THE 1937 NATIONAL CONTEST re vealed preceding installment beginning steps RC model plane development blend two different hobbies gas-powered model planes amateur radio modeler needed produce stable controllable plane could easily carry radio gear radioman needed produce airborne radio gear tolerate environment vibration ignition noiseand hard land ings Only few individuals possessed both skills early efforts utilized least two persons stories next four Nats starting 1938 will highlight advancements happened just six entries 1937 number climbed 26 1941 year some old hands would reappear 1938 RC successes burst forth especially final prewar meet 1941 1938 Nationals second AMA Nats RC event Detroit July 9 1938 five entries Two veterans 1937 event Pat Sweeney Walt Good Chet Lanzo 1937 winner did enter time Elmer Wasman spectated due receiver problems Leo Weiss B Schiffman didnt show three new comers Clinton DeSoto Howard Flanigan Mike Roll DeS oto giant 25-lb Cub 14-ft span twin Forster engine two controls rudder elevator required four separate receivers using new RK62 three-part series concluded issue author has taken us first RC event atthe 1936 National Con test year AMA founded 50 years ago final prewar Nats 1941 Offering RC first time may have pure optimism no entrants RC established itself forever dynamic modeling class just five years later Part 3 alt Good Histryot RC Flying newcomers would arrive bolster ranks No person actually entered five prewar Nats RC events Although Wasman Good attended five officially flew four However enough repeaters present meet develop camaraderie among pioneers closeness still remains today 50 years later meet well review top fliers equipmentand observe de velopment trends toward success Fi nally well witness moments Raytheon gas tube one-tube superregen circuit Sigma relay Four transmitters four separate frequencies 56-60 MHz used operate receivers give left/right up/down flight control no signal control surfaces remained last positions No provision made automatic return neutral positions hind sight tells us non-neutral-return system may have difficult fly early stage RC Two reversible motors operated rud der independently simultaneously desired Everyone anxious see behemoth fly Total radio payload 4 lb Before Nats total flight weight 28 lb 10-in-dia wheels steel landing gear lightened bring weight just under RC event limit 25 lb maximum1 very disappointed giant Cub wasnt flown day Ive learned whether Cub ever flown 76 Model Aviation Left WaltGood RC Guff new bodyforthe 1938 Nats LesterGood Pop left ham operator Kreiiick right Right Aithough external damage plane mild lnternai damage receivers appeared awesome repaired used again Goods radio equipment 1938 Ciockwise right receiverwith Type 30 tube sensI tive relay escapement Au homemade picture taken Kalamazoo Airport few weeks afterthe 1938 Nats crash shows Walt amiiing No wonder Guff re built Rxsee side window fiying again 1938 Left DeSoto Cub second 1938 Nats sits Wayne County Airport hangar Wing 25-lb model can seen back ground Center Four RK-82 receivers controlled Cubs rudder elevator Right Cub fuselage outside hangar Its biggie Goods Big Guff new fuselage big radio compartment 12 x 15 x 6 allow easy access airborne gear relays actuators changed 1937 rig Homemade polarized relays lightweight balanced armatures resistant engine vibration would operate reliably current change iampere actuators changed homemade four-spoke escape ments mounted directly fin hori zontal stabilizer allowing very short direct mechanical connection control surfaces 1-az escapement posi tive positions very fasta few tenths second position old cycling actuator took over 3 sec lacked positive home positions Both rudder elevator op erable However rudder ac tually connected 1938 meet Howard Flanigans plane 8-ft span two large four-spoke escapements cabin rudder elevator control used two RK62 receivers 56 60 MHz Brown Jr power Pat Sweeney brought new plane Custom Cavalier well-established design Free Flight Gas arena believed used some 1937 gearwith rubberband-driven escapement rudder control Mike Roll ancient photo album see RC plane streamlined shoulder-wing type similar Cavalier used rudder control Strangely much detail written about equipment early RC models partly because re porters werent very knowledgeable about RC partly because RC event re ports brief order share space other events Nats Radio Control event Satur day July 9 windiest day Nats pioneers liked RC didnt like much wind Good ship chalked up about 30 flights since last Nats gained confidence new controls decided give try keep account 1939 flight accurate unbiased turn description Charlie Grant editor Model Airplane News2 Toward end Saturday afternoon after diligent work during entire day Walter Good radio-controlled mod el prepared flight demonstrated efficiency radio mechanism ground worked perfectly great praise due young man unique efficient mechanism em ployed Paul Kreilick radio operator shares honor mechanism complete efficient has exhibited Finally undertook fly ship though wind blowing about 20 miles per hour very gusty difficult because novelty type ship keep spectators rushing May1986 77 Left Howard Flanigan hat hIs 8-ft cabin plane two controls placed third 1938 Right Flanigans setup used two Sigma relays top two escapements bottom fastened wooden bulkhead fitted Inside cabin Left Bill Good holds Guff fuselage next new 20-watt transmitter storage bat tery 400-volt genemotor Thats portable believe new fin/rudder also added 1939 Center homemade escapement used Guff fin stab rudder elevator control also new 1939 RIght Cutaway view rud der escapement mounted Guff fin Escapement sketched oversize show details 1939 group endeavoring prepare models flight However finally model taken field motor started took off Unfortunately grass quite long some caught elevator flap deflected takeoff model immediately went stall recovered However seoond stall after zoom turned over its back made complete loop meantime Walter endeavor ing 100-yard dash back operating mechanism means hoped remedy disastrous condi tions flight Unfortunately though bottom loop model hit ground just before nosed up before Walter oould oontrol ship ship complete washout radio apparatus inside ship looked someone stirred around concrete mixer tail part mechanism damaged nose pushed spite damage hours work gone model Walter still smile commend him highly must admit smile partly fake because kicking myself being near transmitter end launch carefully instructed radio helper Paul Kreiick W8QQE hold control box oould grasp easily after galloped back launchand cautioned him move switch because never flown plane before touch rudder would have corrected stall placing Guff circling 1940 Left Biebermans transmitterwith V antenna sits top car atthe 1939 Nats Right Biebermans one-tube receiver seen through transparent panei fuseiage 78 Model Aviation Left Joe Raspanti ground-tests Super Buccaneer second 1939 Nats Note tripod-mounted controi box Center controi box used teiephone dial Rudder engine controls dialed Right four-tube receiver sensitive relay inside cabin Left Phil Sonheim fourth 1939 helper shown holding receiver package plane uncle present-dayAMA leader Dick Sonheim Right Elmer Wasman makes always-required adjustments entry just before placing third Wasmans fuselage carried RK-62 tube receiver escapement rudder didnt make successful 1939 Nats flight Irwin Leshners RC entry 1939 Nats 1940 flight dont really believe long grass deflected takeoff Grant suggested Since wing-tip-assisted launch finally released shoulder Left Phil Sonheim 9-ft 3-ch piano Right close-up homemade selector device Note use bulkheads compartments separate heavy equipment Left Wasman launches model wing tlpfrom plywood runway Model hitthe background weeds Jim Walker sits foreground Right Bob Rederand radioman pylon modelrudder-only controls May1986 79 Left Bill Good built two-channel transmitter overnight local electronics store won meet next day Center Bill Wait prepare RC Guff flight fitted rudder elevator engine control rudderwas used 1940 Nats Right Bill tuning receiver meter priorto flighta standard necessary procedure early days Photo byAl Daraghy IegTrIeaspIanewItn -orsieranaseIec tor telephone exchange behind windows Left Custin brothers Tom Jim fourth 1940 Nats 8-ft model Right Tom Custin holds 3-lb RC receiver controlsall removable unit Lull uruuruuw IUUU 1anwith Cecil Winik helping Right JohnAultandeniargedRCBuccaneerBth RC-1 wuih covers removed 5uuwu three motorizeu udpemOnts two ono-tube receivers 1941 Jim Walkers 1941 Nate winnerwith just 7-ft span pulse proportional control rud der engine speed featured trike landing gear powered Brown Jr Left Winnie Davis launches Siggys 1 4-lb RC plane Right Siegfrieds 50-watt transmitter can seen sitting cartrunk control console ground tall 1 4-footerln background Plane foreground backup Siegfried went finish third place height effect grass reduced Normally Guff would climb slowly launch stable Free Flight model first control command could delayed several minutes desired can sure learned lesson about launching wind important flight Later launching such wirrd handled quite easily same model long pilot controls start brother Bill controls instead Great Lakes ship radio operator would have flicked bit rudder before first stall Grant says further 20-mile wind crackup initial flight dis couraged other radio event contestants . evident experiences men least three four days should spent assembling testing before preparation flight days time proved insufficient prime cause lack successful flights radio models gusty weather clinched matter far flights concerned agreed statement would three years before time margin added meet schedule fact 1941 Nats would first set aside three days RC final standings 1938 Nats based ground demonstrations attemp ted flight follows 1 Walt Good Kalamazoo MI 2 Clinton DeSoto Granby CT 3 Howard Flanigan Detroit MI 4 Pat Sweeney Chicago IL 5 Michael Roll Dearborn MI though Guff given first place very satisfying win Thus end second Nats with much RC interest still no convincing demonstration actual maneuvers radio-controlled model plane3 1939 Nationals contrast 1938 Nats five RC entries 1939 Nats 16 11 actually showed up Wayne County Airport Detroit time RC event showed promise some real action Four 11 repeaters 1937 1938 Flanigan Gcod Lan zo Wasman newcomers Bieberman Leshner Mende Raspante Rose Siegfried Sonheim year judges would using point system first time ground points given workmanship control operation before actual flight flight points given several different maneuvers such cross-country return circles left right Figure8 others perfect score would net 100 points Left Earles 9-ft original REM three receivers Right Earle holdethe plane friend works control box table Transmitter located cars trunk pilots meeting judges decided would call out maneuver advance fast-talking pilot wouldnt get away describing what plane just donerather what sup posed contestant suggested model four vacuum tubes receiver should receive points receiver just tube course one-tube fliers objected judges ruled performance principal factor number parts Thank goodness models basic rudder control few also elevator control used new single RK62 gas-tube receiver Sigma relay escapement actuators trend rudder-only beginning emerge Goods weather perfect cumulus clouds very light breeze better brother Bill present first RC Nats having missed two before Gulf new fin rudder replace ments account 1938 Nats flight damage new lighter 05-oz escape ments two receivers rebuilt ver sions same Type 30 tube batteries anchored floor body instead being part receiver/relay package 1938 crash batteries integral receiver package proved decisively pound loose batteries could very destructive Lesson learned mount 80 Model Aviation Hemps Miss America RC fuselage Power Barker engine model placed fourth batteries separately 60 flights Guff several public demonstrations through out southern Michigan during 1938 high hopes might year true RC demonstration Bill pilot always took turns launched Guff running wing tip First judges called left circle followed right circle plane did both came cross-country return request plane climbed light breeze almost two minutes before judges said half-mile paint reached Bill steered 34-circle left followed -circle right headed back toward transmitter Guff soon arrived overhead com plete returnat point well over 1000 feet altitude Guff being turned back wind Figure-8 requested large left circle followed equal-sized right circle form 8 went smoothly Next Bill chose spiral dive stall optional stunt maneuver also went well home practicing spiral dive loop using just rudder control bit unreliable agreed use should mentioned though Guff both rudder elevator controls decided use rud derwith experi ence elevator receiver switched off elevator escapement pinned neutral required air maneuvers completed plane cruising 1500 feet thermal engine stopped 6 min normal 1941 next few minutes Bill repeated several maneuvers try better point score dont remember whether ploy helped control during glide worked well still altitude burn moment district radio inspec tor earlier checked ham licenses witnessing flight asked might have try stick keeping eyes plane Bill calmly asked him ham license reply No Sorry said Bill Fliers other events field collected around transmitter land ing area after word spread radio job air judges trying tell Bill make turns approach butt tell judge last task spot landing Bills job make turns saw fit get close possible Bill using steering technique keeping final turn before landing banked long possible giving quick opposite rudder level wings followedby neutral plane would float smooth landing did less 100 feet judges points awarded 89 out possible 1O0 What nice day flight Zak s 1939 Nats Book said under control9 Sure wasp moment took off until glided back its master worth coming Nationals just see historic per forniance5 Joe Raspante 11-ft Super Buc caneer set up flight Sal Taibi person ever saw could hand-launch giant plane over headnot wing tip Joes plane four-tube receiver rudder control beautifully crafted powered Forster 99 control box used telephone dial five com mands up/down right/left stop engine Since photos plane show no elevator flap believe rudder engine active controls used year flight lasted almost four minutes gathered total 11 points second RC flight made 1939 Nationals account states radio interference stopped engine prematurely Elmer Wasman short flight meet third place told later best RC demonstration took place dedication new airport southern Georgia shortly after Nats According notes total six pilots attempted flights day list below shows placed P1 Name Hometown Age Points 1 Walt Bill Good Kalamazoo MI 23 89 2 Joe Raspante Brooklyn NY 29 11 3 Elmer Wasman Jacksonville FL 30 9 4 Phillip Sonheim Niellsville WI 27 8 5 Charles Siegfried Wichita KS 42 8 6 Robert Mende Flint MI 22 8 7 Erwin Leshner Philadelphia PA 20 6 8 Jesse Bieberman Philadelphia PA 34 6 9 Howard Flanigan Detroit MI 54 1 10 Chester Lanzo Cleveland OH 25 1 11 Robert Rose Highland Park MI 190 1940 NatIonals entries actual flights surprises encountered event held Chicago time 11 planes appeared 16 entries least seven made scored flights Six entries May1986 81 Ault helmet RC Guff-type plane escapement control fifth George Karpovich adjusts Custom Cava lier featuring two-escapement control Clin ton DeSoto helps transmitter controls Left Ken Harker behind Purdue UniversItys 1 21/2ft entry Model demonstrated ground flown Center Harker transmitter used tone control three-channel operation Right 1 0-tube receiver electronic tone selectIon used Harker plane repeaters five newcomers Charlie SiegfrIed Siggy Wichita largest plane 15-ft span 1 3-lb weight Forster 99 power dubbed telephone exchange because its control system rudder elevator engine basically dial telephone simi lar Raspantes system dialing given set pulses airborne selector switch would energize desired electric motor give say left rudder signal turned off rudder would return neutral similar action operated ele vator different number pulses Engine control however remained throttle position set having no automatic neutral return feature airborne collection electronics motors gears selector batteries weighed 3 lb described CE Bohnenblust Charlies radioman QST magazine carried cover photo Charlies plane6 control box size small suitcase complete neck strap made him lcok like street vendor central stick controlled rudder elevator through mechanical pulse generator details revealed long cable box led trunk Siggys car 50-watt transmitter housed typical flight Siggy would start Forster 99 hoist giant plane onto Winnie Davis shoulder quickly don control box check systemalways talking steady stream Winnie would run full speed heave plane air show repeated times meets Siggy became special characters RC circuit can still remember flights plane went dutifully through required maneuvers drifting down wind whole time finally disappearing behind trees outside airfield Spot landings thing controls did work time Siggy eamed second place closest top ever reached proud Joe Raspaate followed Siggy third place very respectable flight Super Buccaneer Jim Tom Custia Wisconsin tcok fourth place original 8-ft cabin plane weighed about 10 lb Power twin-cylinder engine built friend Ed Schunke Earlier tried Forster 99 didnt have enough power suit Tom built radio system control rudder engine7 two control channels gave variable positions based clever sequenced-selector-pulse systemalmost proportional control receiver used RK62 tube home made polarized relay servos Pittman permanent magnet motors using Continued page 171 82 Model Aviation TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals A/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED RC History/Good Continued page 82 lead-screw speed reduction transmit ter control box called wheatfield because dozen clattering relays generate pulses Hmmmdigital con trol Jim being older assumed posi tion pilot made several RC flights just before Chicago Nats Im allowed mention ended treesomething about missed pulse Toms system However day Nats Jim report summer job Lake Michigan ship Tom became pilot official flight Tom says plane got air OK made two maneuvers before ship turned wrong way went ground8 good enough fourth place Tom recently retired General Elec tric Syracuse Jim thinking about retiring job patent lawyer Milwaukee Ben Shereshaw Several planes threefunction controls rudder elevator motor REM unusual Shereshaws twin-boom pusher called RC-1 Cecil Winick Radio Control Headquarters RCH attended ad justments RCH receivers motorized escapements What pretty plane Fifth place John Ault enlarged Buccaneer awarded sixth place using escape ment rudder control Phil Sonheim another REM ship 9-ft mid-winger housed completely homemade selector electric motor system very neat compact took ninth place leamed later uncle Dick Son heim well-known present-day AMA lead er RC system never published probably because Phil turned skills secret war work shortly after Nats Im told died during war under rather mysterious circumstances pursuing work States Goods second time brother Bill able team Nats felt Guff better shape beforeand pilots hundred flights stick practice Some public demonstrations several meets Illinois Michigan Ohio Canada What surprise Bill found waiting us after first night Sherman Hotel After breakfast Wednesday morning went car hotel lot found hole Guff wing stored just beneath car ceiling dad said binoculars gone Bill said Wheres transmitter gone too After few hours discussion hotel management local police became clear recovery stolen items extremely unlikely What next question RC event scheduled next morning Thursday Bill said Walt fix wing Ill build transmitter Thats what happened Bill went Newark Radio Store State Street explained problem manager said lots parts would night inventoryand workbench back room oouldnt believe Bill never worked fast home morning came forth two radio tubes 4-ftsq piece plywood along bunch coils parts reminded overnight transmitter should touched because 400 volts exposed everywhere almost forgot temporary control box Ken Davis rigged up 400 volts too survived somehow way RC site 79th Keeler stopped open field make quick distance test OK after some tuning site word spread about stolen transmitter several fliers offered use Joe Raspante guy beaten out first Save old Timer Podp5jtiqUO si6~ GbaflW0From this.k sped rtmers potfltS Ian9 Mode Engine Parts Only Over 600 items Send *200 current catalog pAN AR 05pA C 200/o Greater Heat Resistance Impervious Exhaust Products Eliminate Burned Up & Blown Out Silicone SEND 4 SOperS/8 D Coupler or500per3/4 ID DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54580 May1986 171 III PROP ASSEMBLY #1 09-ELECTRIC ONLY PROP HUB ASSEMBLY #IOOA 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #100A Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair POOP HUB ASSEMBLY # 110 051 engines electric motor equivalent WeightS grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP 1101 ASSEMBLY N 111 0 engines electric motor equivalent 20 grams$2000 PROP BLADES FOR HUB N 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line FAI RUBBER Sizes 114 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber mdse add $1 50 UPS Over $lSaddlO% Phone O213 830-8939 H377-1959 P30 HEADQUARTERS Special kit/rubber combos NEW NEW P30 prop $2495 Coupe deVIIIe Finished prop Very very complete Tilka____ Wakefield22Fe shed F Oct End_______ KSB TIMERS Fuel Shutoff 3Osec-$1195 BminDT-$1195 $3895 plus $250 UPS Send $100 1986 Catalog F Model Supply L7 P0 Box 3557 Torrance CA 90610 NEW FROM FOX 15X 15 RC featuring all-new Mark X carburetor 42 9O muffler #21500 Bore590 Stroke . 540 Weight 45 oz RPM 7-5 prop14000 muifler installed RPM 8-4 prop 13000 muffler installed lightest weight lowest cost 15 can buy now boasts all-new Marki carburetor better-than-ever per formance Runs best lO/o nitro fuel little jewel still compact enough light enough fit models designed 09s 10s VISA Mastercard Accepted F0x MFG Co 5305 TOWSON AVE 0RT SMITH AR 72901 5011 646-1656 Easiest Hinge Install Now available scale size PRO HINGEJ use cyanoacrylate adhesives No pinning messy epoxyInstant glues neededSpecial Paper No special hinge slotter needed No alignment necessary stic Special Paper RADIO SOUTH Inc 43 West Nine Mile Rd Pensacola FL 32414 904 478-6745 place year before real sports manship Ive always very warm feeling Joe ever since cant say same Sherman Hotel meet decided fly rudder though overnight trans mitter two channels before did use elevator newly-installed throttle control Actually Guff carried two separate receivers option rudder/elevator rudder/engine might have earned some extra points Fortunately opportunity make several flights meet almost pulled off secret maneuver inside loop practicing home field using rudder con trol began using full left rudder start left circle spiraled tighter steeper turn during model picked up considerable speed nose pointing down steeply gave opposite rudder just long enough stop turn held neutral nose rotated rapidly vertical position plane stalled fell over its back recovered level flightmaldng pear-shaped loop9 meet engine quit top stall model flopped down going neatly over its back Luckily altitude sufficient glide back within 20 ft spot maxi mum landing points Note final points listed below lower year before time judges required give fewer points poorly-executed maneuvers Further Leo Weiss judges taldng postmans holiday RC target drone job Wright Field P1 Name 1 Walt Bill Good 2 Charles Siegfried 3 Joe Raspante 4 Jim Tom Custin 5 Ben Shereshaw 6 John Ault 7 Phil Sonheim 8 Elmer Wasman 9 Lester Helle 10 Jesse Bieberman 11 Bob Reder Controls R REM REM REM REM R REM R R R R Points 65 49 34 23 19 17 13 12 11 10 6 1941 Nationals event Chicago July 1-6 fifth RC last prior WW II Up time biggest best ever held field 26 RC entries yielded 12 scoring pilots three repeaters nine newoomers eight total 40 flights over three-day period first time extra days allowed tuning preparations poor weather other delays fortunate first two days plagued windy weather Siegfried Ault Reder repeaters names new comers will emerge go Bill attended meet did enter plane highly-inter ested spectators Bill honey moon finishing PhD research thesis Based sensible priorities neither us should have just couldnt miss time newcomer took first place Jim Walker Fireball Control Line fame Portland OR remembered preceding 1940 Nats Jim spent time carefully observing RC event helped Elmer Wasman launch plane Also several 1940 photos showed Jim critically watch ing RC planes judges Rumors Walkers preparations RC model leaked Bill through some letters Ed Rockwood rabid RC experimenter West Coast rumor mentioned new system called proportional control something dreamed about never seen would new exciting true Jim Walker Sure enough entry small 7-ft ship proportional rudder proportional engine speed used two standard RCH receivers relays very clever way engine control simpler two controls used two sets breaker points engines ignition system set high speed other low speed led primary spark coil wire through relay contacts two timer points Signal oft save low sneed save hish sneed RC $249/pkg 18 Scale $449/pkg 24 neat part pulsing channel gave intermediate speed Theres Changing pulsing dwell time pro duced speed between low high medium speed engine emitted distinc tive burping sound jumped between high low speed rudder channel used dwell-time pulsing used small electric motor driving through fluid coupler rudder pulled left side spring oft signal rudder left signal right Dwell-time pulsing gave 50/50 ratio neutral rudder varying pulse ratio gave desired position full left full right truly propor tional rudder following control stick first contest demonstration dual-proportional system using two independent radio channels model plane Furthermore Jim squeezed equipment small time 7-ft plane weighed 5 lb fully loaded did first taxi maneuvers ever seen proportional systemeven bumpy dirt road tricycle landing gear helped accomplishment Walker awarded 88 points out possible 100 air maneuvers spot landings taxiing clear Walkers last flight carried smoke bomb simulate skywriting skillful competitor RC competitors later Arthur Earle Close behind Walker next plane earned 83 points second place five-point gap differ ence between assisted takeoff 5 points taxi takeoff 10 points Earles 9-ft plane powered Ohlsson 60 used three controls REM original design andget thishis first model plane three controls actuated escapements three sepa rate receivers flying very con sistent spot landings stopped within 54 ft spotexcellent days Earl newcomer knowledge never flew again National Contest Charlie Siegfried using 1940 plane took third place higher score second place year before managed large loop may have first recognizable performed Nationals Ken Harker modem plane brought two electrical engineering stu dents Purdue University attracted great attention its complete complex control system Harker Dick Symonds designed built 14-tube receiver five audio channels rudder ele vator engine controls Selective audio circuits directed command signal desired electric motor control surface No sequence system delays electronic equivalent tuned-reed system used Leo Weiss 1937 ground checkout demonstrated control direction could quickly chosen control surface speed seemed quite slow us since travel time neutral full deflection about four seconds0 12-ft plane sported sleek racertype body 3A-hp Mercury Avia en gine disappointing us flown meet whole system beautifully crafted though Bill didnt bring plane satisfaction seeing two dupli cates 8-ft Guff meetthe first meet two look-alike planes present John Ault flew Guff seven times meet fifth place 50point score called plane Spook gave no explanation why2 now actively retired Arkansas Mike Thomas Pittsburgh RC Contest Director Frank Zaic Harry Copeland judges names other officials couldnt found reference material final standings P1 Name Plaae Equipment Points 1 Jim Walker 7-ft trike gear RM proportional 88 Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blend4 Chnices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balinons FILLER SB SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS r Over 1000 ToolS FREE Catalog I4FROM MicroMark Small Tool Specialists yao asa miniature issla pselt find t~atstaeeting asians ear new MiCNOMANK cafaingl Mann teals hard-ta-find . mann HUGE DISCOUNTS Na mere searctdag frnm stare fanfare New enerynhina pan need clone peer mailbas Save time sane macen Use coupon mend name addresa MICROMARK ass vi 12-201 94 Cant Main 5t Chases NJ sanee I I assneasI tnt _________________________________ snese ______ sip I L1 May1986 173 found talented showman midable opponent Only Way Iy Fabtronics Mark 3 CDI pointless system Works Great Most 2 4 Cycle engines Automatic Spark control now avaitabte moat 4 cycte engines comptene System Batteries non mci69 add $3 poss & HendI FABTRONICS 375 Isle Royal Rd Calesburg IL 61401 2541 NE 11th Court ano Beach Florida 33062 e 305 941-9119 AVAILABLE FROM LEADING DEALERS AND DISTRUBUTORS DIRECT 2 Arthur Earle 9-ft orig REM3esc 83 3 Charles Siegfried 15-ft orig REMselec tor 77 4 Marvin Hemp Miss America RE2esc 73 5 John Ault 8-ft Guff RM2esc 50 6 George Karpovich Custom Cavalier RM 2esc 39 7 HD Edwards 9-ft Cavalier RM2 elect mot 29 8 Bob Reder 8-ft Sailplane Rlesc 13 9 Ken Harker l2-ft orig REMtones 9 10 Clark Hile 8 pts 11 Cecil Winik 6 pts 12 Allen Trinuner 5 pts R er E ator M r account five-year history RC event AMA National Contest makes plain Radio Control arrived time 1941 event small new distinct category model plane family measure rapid buildup near end period number RC flights40 flights 1941 compared total 10 flights previous four years Receivers Technically airborne radio gear still highly experimental extremely fussy Tuning adjusting finicky sets occupied much contest time example receivers 45-volt B battery dropped little volt tuning relay settings redone single-tube receivers both Type 30 vacuum tube RK62 gas tube could coaxed job needed time superregenerative mode opera tion highly resistant spark ignition usually no problem Other types detector modes used three- four-tube sets did fare well extra audio tubes ad versely affected vibration especially powered models Relays Commercial units heavy expensive sensitive vibration mar ginally adequate small plate current changes available receivers Homemade relays fared better tail ored particular receivers use remember brother Bill wrote article 1940 QST magazine giving construction details homemade DG-6 polarized relay received hun dreds requests hams informa tion availability purchasing13 think fact stated built relays 500 350 magnet 150 fine wire grabbed atten tion labor winding half-mile fine wire small form forming metal parts included cost Later Sigma other commercial relays came available Control systems used during period varied may grouped several categories follows 1 Escapements ranging size oz 4 oz seen rapid positive over half models Some used escapement rudder alone others used up three channels giving rudder elevator mo tor REM Escapements would prove around years come would appear various clever arrangements 2 Sequential selector systems worked like dial telephone used Siegfried Wasman Sonheim others group pulses received selector would connect power specific control surface electric motor would move surface desired direction gave multiple controls single channel slow operated control surface timeprobably better slow boat fast airplane 3 Non-sequential selectors such Weiss 1937 tuned reeds would become very popular 195 Os time delay selecting control fraction second Harkers electronic tone selec tion system similar result Both planes ahead time such ambitious projects enormity complexity efforts involved caught unproven contest time 4 Walkers proportional pulsing also ahead its time demonstrated superbly its effective control capability DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 83401 314 221-8803 aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40 SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE 174 Model Aviation PRODUCTS FOR THE DISCERNING MODELER DYNATHRUST PROPS look great too! ALL FUTURE PRODUCTION ON ALL SIZES WILL HAVE LOGO AND TIPS PAINTED SIZES CURRENTLY AVAILABLE 13x6 15X6r 8 $700 18x6 8r 10 0 22x8 10 0 14x6 16X6 8 $800 20X6r 810 0 AddlSizesAvailobleSoonf .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74r3pak$495 4Q4r INTERCEPTOR Folding Wing Gilder U-Build-It Kit $395 4 Ready Fly $795 Add $3 postage handling first additional P0 Box68132 AIRCRAFT Co Portland OR 97268 Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship PrformanC 020 Inglnes FeeFlighl Rubber Pulse small Multi Channel R/C systems suItable 50 pears ago mas very capable aircraft mell$2195 proportioned stable model flight ao interestingKIT #102 design lending itself balsa strontaral techeiqoes Wev aol e wrale line 01 rear tavorites please send 505 tnt Flyline Cetalco prone 17031 273-0503 Sea ens ano Oistibators neited FLYLINE MODELS INC PO Box 2136 Fairfax VIrginia 22031 Transmitters easiest part RC systems since unusual limits weight size Power outputs five 40 watts normal almost used 5 6-60 MHz ham band Thanks ARRL pio neering hams having frequencies basic equipment available right time course would have better simpler radio licenses available need would solved after WW II AMA FCC developed no-exam RC license lessons learned pre WW II years five AMA National Contest RC competitionsand viable RC systems developed pioneers less-successful pioneers showed us directions followthereby help ing others avoid Undoubtedly RC development would have progressed much slowly stimulation provided contests Thanks AMA supporting organizations indi viduals made RC meets possible include Detroit Exchange Club Polks Steve Corbetts Chicago Parks Frank Nekimkens many others period next AMA Nats RC meet would take place until after end WVT II 1946in Wichita KS follow ing decades would see giant leap growth rate AMA membership num bers due primarily bursting popu larity RC competition event period still another storyor group stories Acknowledgements Thanks wife Joyce brother Bill son Terry supportand others helped research series References DeSoto Clinton B QST October 1938 Air Trails May 1939 2Grant CH ModelAirplane News September 1938 3Good Walter Air Trails January 1939 4Good William QST March 1940 Zaic Frank Walter Farynk National Model Airplane Meet Pictures 1939 6Bohnenblust CE QST August 1940 7Custin James R Model Airplane News Au gust September 1947 Custin J T Inverview September 18 1985 9Good Walter Win Air Trails November December 1940 January 1941 0DeSoto Clinton B QST September 1941 little device sounds steady beep guide right plane Easily mounts smallest planes Use connector plug receiver same servo Also tells someone frequency solid state crystal oscillator Comes ready mount full structions included WT 1 oz DIM 1 x2 3/8 x 3/4 MADE IN USA CLUB DISCOUNTS AVAILABLE * ASK * F3H IntI/JoIIy Continued page 86 Rudnick two complete 21km course managed come home minute faster Rud nick Official flying began Monday Decem ber 9 would like travel way around world contest have SEND CHECK OR MONEY ORDER TO ELECTRONIC DESIGNS INC BOX Z 1925 GREENWOOD LK TPK HEWITT NEW JERSEY 07421 PHONE 201 7281616 Plus $200 Shipping cont USA NJ Residents add 6% Sales Tax COD add $200 Allow 2 wks Shipping May1986 175 lightweight package Later other mechanDavis Al ModelAirplane News Septemlr isms single dual proportional sys 1941 tems would become popularKulick Harold Model Airplane News Oc 5 earlier slow-cycling systems used tober 1941 1937 planes Lanzo Good didnotGood William bc cit reappear after first year indicating other methods considered effec tive 1EEV ONLY
Edition: Model Aviation - 1986/05
Page Numbers: 76, 77, 78, 79, 80, 81, 82, 171, 172, 173, 174, 175
THE 1937 NATIONAL CONTEST re vealed preceding installment beginning steps RC model plane development blend two different hobbies gas-powered model planes amateur radio modeler needed produce stable controllable plane could easily carry radio gear radioman needed produce airborne radio gear tolerate environment vibration ignition noiseand hard land ings Only few individuals possessed both skills early efforts utilized least two persons stories next four Nats starting 1938 will highlight advancements happened just six entries 1937 number climbed 26 1941 year some old hands would reappear 1938 RC successes burst forth especially final prewar meet 1941 1938 Nationals second AMA Nats RC event Detroit July 9 1938 five entries Two veterans 1937 event Pat Sweeney Walt Good Chet Lanzo 1937 winner did enter time Elmer Wasman spectated due receiver problems Leo Weiss B Schiffman didnt show three new comers Clinton DeSoto Howard Flanigan Mike Roll DeS oto giant 25-lb Cub 14-ft span twin Forster engine two controls rudder elevator required four separate receivers using new RK62 three-part series concluded issue author has taken us first RC event atthe 1936 National Con test year AMA founded 50 years ago final prewar Nats 1941 Offering RC first time may have pure optimism no entrants RC established itself forever dynamic modeling class just five years later Part 3 alt Good Histryot RC Flying newcomers would arrive bolster ranks No person actually entered five prewar Nats RC events Although Wasman Good attended five officially flew four However enough repeaters present meet develop camaraderie among pioneers closeness still remains today 50 years later meet well review top fliers equipmentand observe de velopment trends toward success Fi nally well witness moments Raytheon gas tube one-tube superregen circuit Sigma relay Four transmitters four separate frequencies 56-60 MHz used operate receivers give left/right up/down flight control no signal control surfaces remained last positions No provision made automatic return neutral positions hind sight tells us non-neutral-return system may have difficult fly early stage RC Two reversible motors operated rud der independently simultaneously desired Everyone anxious see behemoth fly Total radio payload 4 lb Before Nats total flight weight 28 lb 10-in-dia wheels steel landing gear lightened bring weight just under RC event limit 25 lb maximum1 very disappointed giant Cub wasnt flown day Ive learned whether Cub ever flown 76 Model Aviation Left WaltGood RC Guff new bodyforthe 1938 Nats LesterGood Pop left ham operator Kreiiick right Right Aithough external damage plane mild lnternai damage receivers appeared awesome repaired used again Goods radio equipment 1938 Ciockwise right receiverwith Type 30 tube sensI tive relay escapement Au homemade picture taken Kalamazoo Airport few weeks afterthe 1938 Nats crash shows Walt amiiing No wonder Guff re built Rxsee side window fiying again 1938 Left DeSoto Cub second 1938 Nats sits Wayne County Airport hangar Wing 25-lb model can seen back ground Center Four RK-82 receivers controlled Cubs rudder elevator Right Cub fuselage outside hangar Its biggie Goods Big Guff new fuselage big radio compartment 12 x 15 x 6 allow easy access airborne gear relays actuators changed 1937 rig Homemade polarized relays lightweight balanced armatures resistant engine vibration would operate reliably current change iampere actuators changed homemade four-spoke escape ments mounted directly fin hori zontal stabilizer allowing very short direct mechanical connection control surfaces 1-az escapement posi tive positions very fasta few tenths second position old cycling actuator took over 3 sec lacked positive home positions Both rudder elevator op erable However rudder ac tually connected 1938 meet Howard Flanigans plane 8-ft span two large four-spoke escapements cabin rudder elevator control used two RK62 receivers 56 60 MHz Brown Jr power Pat Sweeney brought new plane Custom Cavalier well-established design Free Flight Gas arena believed used some 1937 gearwith rubberband-driven escapement rudder control Mike Roll ancient photo album see RC plane streamlined shoulder-wing type similar Cavalier used rudder control Strangely much detail written about equipment early RC models partly because re porters werent very knowledgeable about RC partly because RC event re ports brief order share space other events Nats Radio Control event Satur day July 9 windiest day Nats pioneers liked RC didnt like much wind Good ship chalked up about 30 flights since last Nats gained confidence new controls decided give try keep account 1939 flight accurate unbiased turn description Charlie Grant editor Model Airplane News2 Toward end Saturday afternoon after diligent work during entire day Walter Good radio-controlled mod el prepared flight demonstrated efficiency radio mechanism ground worked perfectly great praise due young man unique efficient mechanism em ployed Paul Kreilick radio operator shares honor mechanism complete efficient has exhibited Finally undertook fly ship though wind blowing about 20 miles per hour very gusty difficult because novelty type ship keep spectators rushing May1986 77 Left Howard Flanigan hat hIs 8-ft cabin plane two controls placed third 1938 Right Flanigans setup used two Sigma relays top two escapements bottom fastened wooden bulkhead fitted Inside cabin Left Bill Good holds Guff fuselage next new 20-watt transmitter storage bat tery 400-volt genemotor Thats portable believe new fin/rudder also added 1939 Center homemade escapement used Guff fin stab rudder elevator control also new 1939 RIght Cutaway view rud der escapement mounted Guff fin Escapement sketched oversize show details 1939 group endeavoring prepare models flight However finally model taken field motor started took off Unfortunately grass quite long some caught elevator flap deflected takeoff model immediately went stall recovered However seoond stall after zoom turned over its back made complete loop meantime Walter endeavor ing 100-yard dash back operating mechanism means hoped remedy disastrous condi tions flight Unfortunately though bottom loop model hit ground just before nosed up before Walter oould oontrol ship ship complete washout radio apparatus inside ship looked someone stirred around concrete mixer tail part mechanism damaged nose pushed spite damage hours work gone model Walter still smile commend him highly must admit smile partly fake because kicking myself being near transmitter end launch carefully instructed radio helper Paul Kreiick W8QQE hold control box oould grasp easily after galloped back launchand cautioned him move switch because never flown plane before touch rudder would have corrected stall placing Guff circling 1940 Left Biebermans transmitterwith V antenna sits top car atthe 1939 Nats Right Biebermans one-tube receiver seen through transparent panei fuseiage 78 Model Aviation Left Joe Raspanti ground-tests Super Buccaneer second 1939 Nats Note tripod-mounted controi box Center controi box used teiephone dial Rudder engine controls dialed Right four-tube receiver sensitive relay inside cabin Left Phil Sonheim fourth 1939 helper shown holding receiver package plane uncle present-dayAMA leader Dick Sonheim Right Elmer Wasman makes always-required adjustments entry just before placing third Wasmans fuselage carried RK-62 tube receiver escapement rudder didnt make successful 1939 Nats flight Irwin Leshners RC entry 1939 Nats 1940 flight dont really believe long grass deflected takeoff Grant suggested Since wing-tip-assisted launch finally released shoulder Left Phil Sonheim 9-ft 3-ch piano Right close-up homemade selector device Note use bulkheads compartments separate heavy equipment Left Wasman launches model wing tlpfrom plywood runway Model hitthe background weeds Jim Walker sits foreground Right Bob Rederand radioman pylon modelrudder-only controls May1986 79 Left Bill Good built two-channel transmitter overnight local electronics store won meet next day Center Bill Wait prepare RC Guff flight fitted rudder elevator engine control rudderwas used 1940 Nats Right Bill tuning receiver meter priorto flighta standard necessary procedure early days Photo byAl Daraghy IegTrIeaspIanewItn -orsieranaseIec tor telephone exchange behind windows Left Custin brothers Tom Jim fourth 1940 Nats 8-ft model Right Tom Custin holds 3-lb RC receiver controlsall removable unit Lull uruuruuw IUUU 1anwith Cecil Winik helping Right JohnAultandeniargedRCBuccaneerBth RC-1 wuih covers removed 5uuwu three motorizeu udpemOnts two ono-tube receivers 1941 Jim Walkers 1941 Nate winnerwith just 7-ft span pulse proportional control rud der engine speed featured trike landing gear powered Brown Jr Left Winnie Davis launches Siggys 1 4-lb RC plane Right Siegfrieds 50-watt transmitter can seen sitting cartrunk control console ground tall 1 4-footerln background Plane foreground backup Siegfried went finish third place height effect grass reduced Normally Guff would climb slowly launch stable Free Flight model first control command could delayed several minutes desired can sure learned lesson about launching wind important flight Later launching such wirrd handled quite easily same model long pilot controls start brother Bill controls instead Great Lakes ship radio operator would have flicked bit rudder before first stall Grant says further 20-mile wind crackup initial flight dis couraged other radio event contestants . evident experiences men least three four days should spent assembling testing before preparation flight days time proved insufficient prime cause lack successful flights radio models gusty weather clinched matter far flights concerned agreed statement would three years before time margin added meet schedule fact 1941 Nats would first set aside three days RC final standings 1938 Nats based ground demonstrations attemp ted flight follows 1 Walt Good Kalamazoo MI 2 Clinton DeSoto Granby CT 3 Howard Flanigan Detroit MI 4 Pat Sweeney Chicago IL 5 Michael Roll Dearborn MI though Guff given first place very satisfying win Thus end second Nats with much RC interest still no convincing demonstration actual maneuvers radio-controlled model plane3 1939 Nationals contrast 1938 Nats five RC entries 1939 Nats 16 11 actually showed up Wayne County Airport Detroit time RC event showed promise some real action Four 11 repeaters 1937 1938 Flanigan Gcod Lan zo Wasman newcomers Bieberman Leshner Mende Raspante Rose Siegfried Sonheim year judges would using point system first time ground points given workmanship control operation before actual flight flight points given several different maneuvers such cross-country return circles left right Figure8 others perfect score would net 100 points Left Earles 9-ft original REM three receivers Right Earle holdethe plane friend works control box table Transmitter located cars trunk pilots meeting judges decided would call out maneuver advance fast-talking pilot wouldnt get away describing what plane just donerather what sup posed contestant suggested model four vacuum tubes receiver should receive points receiver just tube course one-tube fliers objected judges ruled performance principal factor number parts Thank goodness models basic rudder control few also elevator control used new single RK62 gas-tube receiver Sigma relay escapement actuators trend rudder-only beginning emerge Goods weather perfect cumulus clouds very light breeze better brother Bill present first RC Nats having missed two before Gulf new fin rudder replace ments account 1938 Nats flight damage new lighter 05-oz escape ments two receivers rebuilt ver sions same Type 30 tube batteries anchored floor body instead being part receiver/relay package 1938 crash batteries integral receiver package proved decisively pound loose batteries could very destructive Lesson learned mount 80 Model Aviation Hemps Miss America RC fuselage Power Barker engine model placed fourth batteries separately 60 flights Guff several public demonstrations through out southern Michigan during 1938 high hopes might year true RC demonstration Bill pilot always took turns launched Guff running wing tip First judges called left circle followed right circle plane did both came cross-country return request plane climbed light breeze almost two minutes before judges said half-mile paint reached Bill steered 34-circle left followed -circle right headed back toward transmitter Guff soon arrived overhead com plete returnat point well over 1000 feet altitude Guff being turned back wind Figure-8 requested large left circle followed equal-sized right circle form 8 went smoothly Next Bill chose spiral dive stall optional stunt maneuver also went well home practicing spiral dive loop using just rudder control bit unreliable agreed use should mentioned though Guff both rudder elevator controls decided use rud derwith experi ence elevator receiver switched off elevator escapement pinned neutral required air maneuvers completed plane cruising 1500 feet thermal engine stopped 6 min normal 1941 next few minutes Bill repeated several maneuvers try better point score dont remember whether ploy helped control during glide worked well still altitude burn moment district radio inspec tor earlier checked ham licenses witnessing flight asked might have try stick keeping eyes plane Bill calmly asked him ham license reply No Sorry said Bill Fliers other events field collected around transmitter land ing area after word spread radio job air judges trying tell Bill make turns approach butt tell judge last task spot landing Bills job make turns saw fit get close possible Bill using steering technique keeping final turn before landing banked long possible giving quick opposite rudder level wings followedby neutral plane would float smooth landing did less 100 feet judges points awarded 89 out possible 1O0 What nice day flight Zak s 1939 Nats Book said under control9 Sure wasp moment took off until glided back its master worth coming Nationals just see historic per forniance5 Joe Raspante 11-ft Super Buc caneer set up flight Sal Taibi person ever saw could hand-launch giant plane over headnot wing tip Joes plane four-tube receiver rudder control beautifully crafted powered Forster 99 control box used telephone dial five com mands up/down right/left stop engine Since photos plane show no elevator flap believe rudder engine active controls used year flight lasted almost four minutes gathered total 11 points second RC flight made 1939 Nationals account states radio interference stopped engine prematurely Elmer Wasman short flight meet third place told later best RC demonstration took place dedication new airport southern Georgia shortly after Nats According notes total six pilots attempted flights day list below shows placed P1 Name Hometown Age Points 1 Walt Bill Good Kalamazoo MI 23 89 2 Joe Raspante Brooklyn NY 29 11 3 Elmer Wasman Jacksonville FL 30 9 4 Phillip Sonheim Niellsville WI 27 8 5 Charles Siegfried Wichita KS 42 8 6 Robert Mende Flint MI 22 8 7 Erwin Leshner Philadelphia PA 20 6 8 Jesse Bieberman Philadelphia PA 34 6 9 Howard Flanigan Detroit MI 54 1 10 Chester Lanzo Cleveland OH 25 1 11 Robert Rose Highland Park MI 190 1940 NatIonals entries actual flights surprises encountered event held Chicago time 11 planes appeared 16 entries least seven made scored flights Six entries May1986 81 Ault helmet RC Guff-type plane escapement control fifth George Karpovich adjusts Custom Cava lier featuring two-escapement control Clin ton DeSoto helps transmitter controls Left Ken Harker behind Purdue UniversItys 1 21/2ft entry Model demonstrated ground flown Center Harker transmitter used tone control three-channel operation Right 1 0-tube receiver electronic tone selectIon used Harker plane repeaters five newcomers Charlie SiegfrIed Siggy Wichita largest plane 15-ft span 1 3-lb weight Forster 99 power dubbed telephone exchange because its control system rudder elevator engine basically dial telephone simi lar Raspantes system dialing given set pulses airborne selector switch would energize desired electric motor give say left rudder signal turned off rudder would return neutral similar action operated ele vator different number pulses Engine control however remained throttle position set having no automatic neutral return feature airborne collection electronics motors gears selector batteries weighed 3 lb described CE Bohnenblust Charlies radioman QST magazine carried cover photo Charlies plane6 control box size small suitcase complete neck strap made him lcok like street vendor central stick controlled rudder elevator through mechanical pulse generator details revealed long cable box led trunk Siggys car 50-watt transmitter housed typical flight Siggy would start Forster 99 hoist giant plane onto Winnie Davis shoulder quickly don control box check systemalways talking steady stream Winnie would run full speed heave plane air show repeated times meets Siggy became special characters RC circuit can still remember flights plane went dutifully through required maneuvers drifting down wind whole time finally disappearing behind trees outside airfield Spot landings thing controls did work time Siggy eamed second place closest top ever reached proud Joe Raspaate followed Siggy third place very respectable flight Super Buccaneer Jim Tom Custia Wisconsin tcok fourth place original 8-ft cabin plane weighed about 10 lb Power twin-cylinder engine built friend Ed Schunke Earlier tried Forster 99 didnt have enough power suit Tom built radio system control rudder engine7 two control channels gave variable positions based clever sequenced-selector-pulse systemalmost proportional control receiver used RK62 tube home made polarized relay servos Pittman permanent magnet motors using Continued page 171 82 Model Aviation TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals A/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED RC History/Good Continued page 82 lead-screw speed reduction transmit ter control box called wheatfield because dozen clattering relays generate pulses Hmmmdigital con trol Jim being older assumed posi tion pilot made several RC flights just before Chicago Nats Im allowed mention ended treesomething about missed pulse Toms system However day Nats Jim report summer job Lake Michigan ship Tom became pilot official flight Tom says plane got air OK made two maneuvers before ship turned wrong way went ground8 good enough fourth place Tom recently retired General Elec tric Syracuse Jim thinking about retiring job patent lawyer Milwaukee Ben Shereshaw Several planes threefunction controls rudder elevator motor REM unusual Shereshaws twin-boom pusher called RC-1 Cecil Winick Radio Control Headquarters RCH attended ad justments RCH receivers motorized escapements What pretty plane Fifth place John Ault enlarged Buccaneer awarded sixth place using escape ment rudder control Phil Sonheim another REM ship 9-ft mid-winger housed completely homemade selector electric motor system very neat compact took ninth place leamed later uncle Dick Son heim well-known present-day AMA lead er RC system never published probably because Phil turned skills secret war work shortly after Nats Im told died during war under rather mysterious circumstances pursuing work States Goods second time brother Bill able team Nats felt Guff better shape beforeand pilots hundred flights stick practice Some public demonstrations several meets Illinois Michigan Ohio Canada What surprise Bill found waiting us after first night Sherman Hotel After breakfast Wednesday morning went car hotel lot found hole Guff wing stored just beneath car ceiling dad said binoculars gone Bill said Wheres transmitter gone too After few hours discussion hotel management local police became clear recovery stolen items extremely unlikely What next question RC event scheduled next morning Thursday Bill said Walt fix wing Ill build transmitter Thats what happened Bill went Newark Radio Store State Street explained problem manager said lots parts would night inventoryand workbench back room oouldnt believe Bill never worked fast home morning came forth two radio tubes 4-ftsq piece plywood along bunch coils parts reminded overnight transmitter should touched because 400 volts exposed everywhere almost forgot temporary control box Ken Davis rigged up 400 volts too survived somehow way RC site 79th Keeler stopped open field make quick distance test OK after some tuning site word spread about stolen transmitter several fliers offered use Joe Raspante guy beaten out first Save old Timer Podp5jtiqUO si6~ GbaflW0From this.k sped rtmers potfltS Ian9 Mode Engine Parts Only Over 600 items Send *200 current catalog pAN AR 05pA C 200/o Greater Heat Resistance Impervious Exhaust Products Eliminate Burned Up & Blown Out Silicone SEND 4 SOperS/8 D Coupler or500per3/4 ID DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54580 May1986 171 III PROP ASSEMBLY #1 09-ELECTRIC ONLY PROP HUB ASSEMBLY #IOOA 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #100A Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair POOP HUB ASSEMBLY # 110 051 engines electric motor equivalent WeightS grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP 1101 ASSEMBLY N 111 0 engines electric motor equivalent 20 grams$2000 PROP BLADES FOR HUB N 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line FAI RUBBER Sizes 114 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber mdse add $1 50 UPS Over $lSaddlO% Phone O213 830-8939 H377-1959 P30 HEADQUARTERS Special kit/rubber combos NEW NEW P30 prop $2495 Coupe deVIIIe Finished prop Very very complete Tilka____ Wakefield22Fe shed F Oct End_______ KSB TIMERS Fuel Shutoff 3Osec-$1195 BminDT-$1195 $3895 plus $250 UPS Send $100 1986 Catalog F Model Supply L7 P0 Box 3557 Torrance CA 90610 NEW FROM FOX 15X 15 RC featuring all-new Mark X carburetor 42 9O muffler #21500 Bore590 Stroke . 540 Weight 45 oz RPM 7-5 prop14000 muifler installed RPM 8-4 prop 13000 muffler installed lightest weight lowest cost 15 can buy now boasts all-new Marki carburetor better-than-ever per formance Runs best lO/o nitro fuel little jewel still compact enough light enough fit models designed 09s 10s VISA Mastercard Accepted F0x MFG Co 5305 TOWSON AVE 0RT SMITH AR 72901 5011 646-1656 Easiest Hinge Install Now available scale size PRO HINGEJ use cyanoacrylate adhesives No pinning messy epoxyInstant glues neededSpecial Paper No special hinge slotter needed No alignment necessary stic Special Paper RADIO SOUTH Inc 43 West Nine Mile Rd Pensacola FL 32414 904 478-6745 place year before real sports manship Ive always very warm feeling Joe ever since cant say same Sherman Hotel meet decided fly rudder though overnight trans mitter two channels before did use elevator newly-installed throttle control Actually Guff carried two separate receivers option rudder/elevator rudder/engine might have earned some extra points Fortunately opportunity make several flights meet almost pulled off secret maneuver inside loop practicing home field using rudder con trol began using full left rudder start left circle spiraled tighter steeper turn during model picked up considerable speed nose pointing down steeply gave opposite rudder just long enough stop turn held neutral nose rotated rapidly vertical position plane stalled fell over its back recovered level flightmaldng pear-shaped loop9 meet engine quit top stall model flopped down going neatly over its back Luckily altitude sufficient glide back within 20 ft spot maxi mum landing points Note final points listed below lower year before time judges required give fewer points poorly-executed maneuvers Further Leo Weiss judges taldng postmans holiday RC target drone job Wright Field P1 Name 1 Walt Bill Good 2 Charles Siegfried 3 Joe Raspante 4 Jim Tom Custin 5 Ben Shereshaw 6 John Ault 7 Phil Sonheim 8 Elmer Wasman 9 Lester Helle 10 Jesse Bieberman 11 Bob Reder Controls R REM REM REM REM R REM R R R R Points 65 49 34 23 19 17 13 12 11 10 6 1941 Nationals event Chicago July 1-6 fifth RC last prior WW II Up time biggest best ever held field 26 RC entries yielded 12 scoring pilots three repeaters nine newoomers eight total 40 flights over three-day period first time extra days allowed tuning preparations poor weather other delays fortunate first two days plagued windy weather Siegfried Ault Reder repeaters names new comers will emerge go Bill attended meet did enter plane highly-inter ested spectators Bill honey moon finishing PhD research thesis Based sensible priorities neither us should have just couldnt miss time newcomer took first place Jim Walker Fireball Control Line fame Portland OR remembered preceding 1940 Nats Jim spent time carefully observing RC event helped Elmer Wasman launch plane Also several 1940 photos showed Jim critically watch ing RC planes judges Rumors Walkers preparations RC model leaked Bill through some letters Ed Rockwood rabid RC experimenter West Coast rumor mentioned new system called proportional control something dreamed about never seen would new exciting true Jim Walker Sure enough entry small 7-ft ship proportional rudder proportional engine speed used two standard RCH receivers relays very clever way engine control simpler two controls used two sets breaker points engines ignition system set high speed other low speed led primary spark coil wire through relay contacts two timer points Signal oft save low sneed save hish sneed RC $249/pkg 18 Scale $449/pkg 24 neat part pulsing channel gave intermediate speed Theres Changing pulsing dwell time pro duced speed between low high medium speed engine emitted distinc tive burping sound jumped between high low speed rudder channel used dwell-time pulsing used small electric motor driving through fluid coupler rudder pulled left side spring oft signal rudder left signal right Dwell-time pulsing gave 50/50 ratio neutral rudder varying pulse ratio gave desired position full left full right truly propor tional rudder following control stick first contest demonstration dual-proportional system using two independent radio channels model plane Furthermore Jim squeezed equipment small time 7-ft plane weighed 5 lb fully loaded did first taxi maneuvers ever seen proportional systemeven bumpy dirt road tricycle landing gear helped accomplishment Walker awarded 88 points out possible 100 air maneuvers spot landings taxiing clear Walkers last flight carried smoke bomb simulate skywriting skillful competitor RC competitors later Arthur Earle Close behind Walker next plane earned 83 points second place five-point gap differ ence between assisted takeoff 5 points taxi takeoff 10 points Earles 9-ft plane powered Ohlsson 60 used three controls REM original design andget thishis first model plane three controls actuated escapements three sepa rate receivers flying very con sistent spot landings stopped within 54 ft spotexcellent days Earl newcomer knowledge never flew again National Contest Charlie Siegfried using 1940 plane took third place higher score second place year before managed large loop may have first recognizable performed Nationals Ken Harker modem plane brought two electrical engineering stu dents Purdue University attracted great attention its complete complex control system Harker Dick Symonds designed built 14-tube receiver five audio channels rudder ele vator engine controls Selective audio circuits directed command signal desired electric motor control surface No sequence system delays electronic equivalent tuned-reed system used Leo Weiss 1937 ground checkout demonstrated control direction could quickly chosen control surface speed seemed quite slow us since travel time neutral full deflection about four seconds0 12-ft plane sported sleek racertype body 3A-hp Mercury Avia en gine disappointing us flown meet whole system beautifully crafted though Bill didnt bring plane satisfaction seeing two dupli cates 8-ft Guff meetthe first meet two look-alike planes present John Ault flew Guff seven times meet fifth place 50point score called plane Spook gave no explanation why2 now actively retired Arkansas Mike Thomas Pittsburgh RC Contest Director Frank Zaic Harry Copeland judges names other officials couldnt found reference material final standings P1 Name Plaae Equipment Points 1 Jim Walker 7-ft trike gear RM proportional 88 Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blend4 Chnices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balinons FILLER SB SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS r Over 1000 ToolS FREE Catalog I4FROM MicroMark Small Tool Specialists yao asa miniature issla pselt find t~atstaeeting asians ear new MiCNOMANK cafaingl Mann teals hard-ta-find . mann HUGE DISCOUNTS Na mere searctdag frnm stare fanfare New enerynhina pan need clone peer mailbas Save time sane macen Use coupon mend name addresa MICROMARK ass vi 12-201 94 Cant Main 5t Chases NJ sanee I I assneasI tnt _________________________________ snese ______ sip I L1 May1986 173 found talented showman midable opponent Only Way Iy Fabtronics Mark 3 CDI pointless system Works Great Most 2 4 Cycle engines Automatic Spark control now avaitabte moat 4 cycte engines comptene System Batteries non mci69 add $3 poss & HendI FABTRONICS 375 Isle Royal Rd Calesburg IL 61401 2541 NE 11th Court ano Beach Florida 33062 e 305 941-9119 AVAILABLE FROM LEADING DEALERS AND DISTRUBUTORS DIRECT 2 Arthur Earle 9-ft orig REM3esc 83 3 Charles Siegfried 15-ft orig REMselec tor 77 4 Marvin Hemp Miss America RE2esc 73 5 John Ault 8-ft Guff RM2esc 50 6 George Karpovich Custom Cavalier RM 2esc 39 7 HD Edwards 9-ft Cavalier RM2 elect mot 29 8 Bob Reder 8-ft Sailplane Rlesc 13 9 Ken Harker l2-ft orig REMtones 9 10 Clark Hile 8 pts 11 Cecil Winik 6 pts 12 Allen Trinuner 5 pts R er E ator M r account five-year history RC event AMA National Contest makes plain Radio Control arrived time 1941 event small new distinct category model plane family measure rapid buildup near end period number RC flights40 flights 1941 compared total 10 flights previous four years Receivers Technically airborne radio gear still highly experimental extremely fussy Tuning adjusting finicky sets occupied much contest time example receivers 45-volt B battery dropped little volt tuning relay settings redone single-tube receivers both Type 30 vacuum tube RK62 gas tube could coaxed job needed time superregenerative mode opera tion highly resistant spark ignition usually no problem Other types detector modes used three- four-tube sets did fare well extra audio tubes ad versely affected vibration especially powered models Relays Commercial units heavy expensive sensitive vibration mar ginally adequate small plate current changes available receivers Homemade relays fared better tail ored particular receivers use remember brother Bill wrote article 1940 QST magazine giving construction details homemade DG-6 polarized relay received hun dreds requests hams informa tion availability purchasing13 think fact stated built relays 500 350 magnet 150 fine wire grabbed atten tion labor winding half-mile fine wire small form forming metal parts included cost Later Sigma other commercial relays came available Control systems used during period varied may grouped several categories follows 1 Escapements ranging size oz 4 oz seen rapid positive over half models Some used escapement rudder alone others used up three channels giving rudder elevator mo tor REM Escapements would prove around years come would appear various clever arrangements 2 Sequential selector systems worked like dial telephone used Siegfried Wasman Sonheim others group pulses received selector would connect power specific control surface electric motor would move surface desired direction gave multiple controls single channel slow operated control surface timeprobably better slow boat fast airplane 3 Non-sequential selectors such Weiss 1937 tuned reeds would become very popular 195 Os time delay selecting control fraction second Harkers electronic tone selec tion system similar result Both planes ahead time such ambitious projects enormity complexity efforts involved caught unproven contest time 4 Walkers proportional pulsing also ahead its time demonstrated superbly its effective control capability DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 83401 314 221-8803 aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40 SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE 174 Model Aviation PRODUCTS FOR THE DISCERNING MODELER DYNATHRUST PROPS look great too! ALL FUTURE PRODUCTION ON ALL SIZES WILL HAVE LOGO AND TIPS PAINTED SIZES CURRENTLY AVAILABLE 13x6 15X6r 8 $700 18x6 8r 10 0 22x8 10 0 14x6 16X6 8 $800 20X6r 810 0 AddlSizesAvailobleSoonf .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74r3pak$495 4Q4r INTERCEPTOR Folding Wing Gilder U-Build-It Kit $395 4 Ready Fly $795 Add $3 postage handling first additional P0 Box68132 AIRCRAFT Co Portland OR 97268 Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship PrformanC 020 Inglnes FeeFlighl Rubber Pulse small Multi Channel R/C systems suItable 50 pears ago mas very capable aircraft mell$2195 proportioned stable model flight ao interestingKIT #102 design lending itself balsa strontaral techeiqoes Wev aol e wrale line 01 rear tavorites please send 505 tnt Flyline Cetalco prone 17031 273-0503 Sea ens ano Oistibators neited FLYLINE MODELS INC PO Box 2136 Fairfax VIrginia 22031 Transmitters easiest part RC systems since unusual limits weight size Power outputs five 40 watts normal almost used 5 6-60 MHz ham band Thanks ARRL pio neering hams having frequencies basic equipment available right time course would have better simpler radio licenses available need would solved after WW II AMA FCC developed no-exam RC license lessons learned pre WW II years five AMA National Contest RC competitionsand viable RC systems developed pioneers less-successful pioneers showed us directions followthereby help ing others avoid Undoubtedly RC development would have progressed much slowly stimulation provided contests Thanks AMA supporting organizations indi viduals made RC meets possible include Detroit Exchange Club Polks Steve Corbetts Chicago Parks Frank Nekimkens many others period next AMA Nats RC meet would take place until after end WVT II 1946in Wichita KS follow ing decades would see giant leap growth rate AMA membership num bers due primarily bursting popu larity RC competition event period still another storyor group stories Acknowledgements Thanks wife Joyce brother Bill son Terry supportand others helped research series References DeSoto Clinton B QST October 1938 Air Trails May 1939 2Grant CH ModelAirplane News September 1938 3Good Walter Air Trails January 1939 4Good William QST March 1940 Zaic Frank Walter Farynk National Model Airplane Meet Pictures 1939 6Bohnenblust CE QST August 1940 7Custin James R Model Airplane News Au gust September 1947 Custin J T Inverview September 18 1985 9Good Walter Win Air Trails November December 1940 January 1941 0DeSoto Clinton B QST September 1941 little device sounds steady beep guide right plane Easily mounts smallest planes Use connector plug receiver same servo Also tells someone frequency solid state crystal oscillator Comes ready mount full structions included WT 1 oz DIM 1 x2 3/8 x 3/4 MADE IN USA CLUB DISCOUNTS AVAILABLE * ASK * F3H IntI/JoIIy Continued page 86 Rudnick two complete 21km course managed come home minute faster Rud nick Official flying began Monday Decem ber 9 would like travel way around world contest have SEND CHECK OR MONEY ORDER TO ELECTRONIC DESIGNS INC BOX Z 1925 GREENWOOD LK TPK HEWITT NEW JERSEY 07421 PHONE 201 7281616 Plus $200 Shipping cont USA NJ Residents add 6% Sales Tax COD add $200 Allow 2 wks Shipping May1986 175 lightweight package Later other mechanDavis Al ModelAirplane News Septemlr isms single dual proportional sys 1941 tems would become popularKulick Harold Model Airplane News Oc 5 earlier slow-cycling systems used tober 1941 1937 planes Lanzo Good didnotGood William bc cit reappear after first year indicating other methods considered effec tive 1EEV ONLY
Edition: Model Aviation - 1986/05
Page Numbers: 76, 77, 78, 79, 80, 81, 82, 171, 172, 173, 174, 175
THE 1937 NATIONAL CONTEST re vealed preceding installment beginning steps RC model plane development blend two different hobbies gas-powered model planes amateur radio modeler needed produce stable controllable plane could easily carry radio gear radioman needed produce airborne radio gear tolerate environment vibration ignition noiseand hard land ings Only few individuals possessed both skills early efforts utilized least two persons stories next four Nats starting 1938 will highlight advancements happened just six entries 1937 number climbed 26 1941 year some old hands would reappear 1938 RC successes burst forth especially final prewar meet 1941 1938 Nationals second AMA Nats RC event Detroit July 9 1938 five entries Two veterans 1937 event Pat Sweeney Walt Good Chet Lanzo 1937 winner did enter time Elmer Wasman spectated due receiver problems Leo Weiss B Schiffman didnt show three new comers Clinton DeSoto Howard Flanigan Mike Roll DeS oto giant 25-lb Cub 14-ft span twin Forster engine two controls rudder elevator required four separate receivers using new RK62 three-part series concluded issue author has taken us first RC event atthe 1936 National Con test year AMA founded 50 years ago final prewar Nats 1941 Offering RC first time may have pure optimism no entrants RC established itself forever dynamic modeling class just five years later Part 3 alt Good Histryot RC Flying newcomers would arrive bolster ranks No person actually entered five prewar Nats RC events Although Wasman Good attended five officially flew four However enough repeaters present meet develop camaraderie among pioneers closeness still remains today 50 years later meet well review top fliers equipmentand observe de velopment trends toward success Fi nally well witness moments Raytheon gas tube one-tube superregen circuit Sigma relay Four transmitters four separate frequencies 56-60 MHz used operate receivers give left/right up/down flight control no signal control surfaces remained last positions No provision made automatic return neutral positions hind sight tells us non-neutral-return system may have difficult fly early stage RC Two reversible motors operated rud der independently simultaneously desired Everyone anxious see behemoth fly Total radio payload 4 lb Before Nats total flight weight 28 lb 10-in-dia wheels steel landing gear lightened bring weight just under RC event limit 25 lb maximum1 very disappointed giant Cub wasnt flown day Ive learned whether Cub ever flown 76 Model Aviation Left WaltGood RC Guff new bodyforthe 1938 Nats LesterGood Pop left ham operator Kreiiick right Right Aithough external damage plane mild lnternai damage receivers appeared awesome repaired used again Goods radio equipment 1938 Ciockwise right receiverwith Type 30 tube sensI tive relay escapement Au homemade picture taken Kalamazoo Airport few weeks afterthe 1938 Nats crash shows Walt amiiing No wonder Guff re built Rxsee side window fiying again 1938 Left DeSoto Cub second 1938 Nats sits Wayne County Airport hangar Wing 25-lb model can seen back ground Center Four RK-82 receivers controlled Cubs rudder elevator Right Cub fuselage outside hangar Its biggie Goods Big Guff new fuselage big radio compartment 12 x 15 x 6 allow easy access airborne gear relays actuators changed 1937 rig Homemade polarized relays lightweight balanced armatures resistant engine vibration would operate reliably current change iampere actuators changed homemade four-spoke escape ments mounted directly fin hori zontal stabilizer allowing very short direct mechanical connection control surfaces 1-az escapement posi tive positions very fasta few tenths second position old cycling actuator took over 3 sec lacked positive home positions Both rudder elevator op erable However rudder ac tually connected 1938 meet Howard Flanigans plane 8-ft span two large four-spoke escapements cabin rudder elevator control used two RK62 receivers 56 60 MHz Brown Jr power Pat Sweeney brought new plane Custom Cavalier well-established design Free Flight Gas arena believed used some 1937 gearwith rubberband-driven escapement rudder control Mike Roll ancient photo album see RC plane streamlined shoulder-wing type similar Cavalier used rudder control Strangely much detail written about equipment early RC models partly because re porters werent very knowledgeable about RC partly because RC event re ports brief order share space other events Nats Radio Control event Satur day July 9 windiest day Nats pioneers liked RC didnt like much wind Good ship chalked up about 30 flights since last Nats gained confidence new controls decided give try keep account 1939 flight accurate unbiased turn description Charlie Grant editor Model Airplane News2 Toward end Saturday afternoon after diligent work during entire day Walter Good radio-controlled mod el prepared flight demonstrated efficiency radio mechanism ground worked perfectly great praise due young man unique efficient mechanism em ployed Paul Kreilick radio operator shares honor mechanism complete efficient has exhibited Finally undertook fly ship though wind blowing about 20 miles per hour very gusty difficult because novelty type ship keep spectators rushing May1986 77 Left Howard Flanigan hat hIs 8-ft cabin plane two controls placed third 1938 Right Flanigans setup used two Sigma relays top two escapements bottom fastened wooden bulkhead fitted Inside cabin Left Bill Good holds Guff fuselage next new 20-watt transmitter storage bat tery 400-volt genemotor Thats portable believe new fin/rudder also added 1939 Center homemade escapement used Guff fin stab rudder elevator control also new 1939 RIght Cutaway view rud der escapement mounted Guff fin Escapement sketched oversize show details 1939 group endeavoring prepare models flight However finally model taken field motor started took off Unfortunately grass quite long some caught elevator flap deflected takeoff model immediately went stall recovered However seoond stall after zoom turned over its back made complete loop meantime Walter endeavor ing 100-yard dash back operating mechanism means hoped remedy disastrous condi tions flight Unfortunately though bottom loop model hit ground just before nosed up before Walter oould oontrol ship ship complete washout radio apparatus inside ship looked someone stirred around concrete mixer tail part mechanism damaged nose pushed spite damage hours work gone model Walter still smile commend him highly must admit smile partly fake because kicking myself being near transmitter end launch carefully instructed radio helper Paul Kreiick W8QQE hold control box oould grasp easily after galloped back launchand cautioned him move switch because never flown plane before touch rudder would have corrected stall placing Guff circling 1940 Left Biebermans transmitterwith V antenna sits top car atthe 1939 Nats Right Biebermans one-tube receiver seen through transparent panei fuseiage 78 Model Aviation Left Joe Raspanti ground-tests Super Buccaneer second 1939 Nats Note tripod-mounted controi box Center controi box used teiephone dial Rudder engine controls dialed Right four-tube receiver sensitive relay inside cabin Left Phil Sonheim fourth 1939 helper shown holding receiver package plane uncle present-dayAMA leader Dick Sonheim Right Elmer Wasman makes always-required adjustments entry just before placing third Wasmans fuselage carried RK-62 tube receiver escapement rudder didnt make successful 1939 Nats flight Irwin Leshners RC entry 1939 Nats 1940 flight dont really believe long grass deflected takeoff Grant suggested Since wing-tip-assisted launch finally released shoulder Left Phil Sonheim 9-ft 3-ch piano Right close-up homemade selector device Note use bulkheads compartments separate heavy equipment Left Wasman launches model wing tlpfrom plywood runway Model hitthe background weeds Jim Walker sits foreground Right Bob Rederand radioman pylon modelrudder-only controls May1986 79 Left Bill Good built two-channel transmitter overnight local electronics store won meet next day Center Bill Wait prepare RC Guff flight fitted rudder elevator engine control rudderwas used 1940 Nats Right Bill tuning receiver meter priorto flighta standard necessary procedure early days Photo byAl Daraghy IegTrIeaspIanewItn -orsieranaseIec tor telephone exchange behind windows Left Custin brothers Tom Jim fourth 1940 Nats 8-ft model Right Tom Custin holds 3-lb RC receiver controlsall removable unit Lull uruuruuw IUUU 1anwith Cecil Winik helping Right JohnAultandeniargedRCBuccaneerBth RC-1 wuih covers removed 5uuwu three motorizeu udpemOnts two ono-tube receivers 1941 Jim Walkers 1941 Nate winnerwith just 7-ft span pulse proportional control rud der engine speed featured trike landing gear powered Brown Jr Left Winnie Davis launches Siggys 1 4-lb RC plane Right Siegfrieds 50-watt transmitter can seen sitting cartrunk control console ground tall 1 4-footerln background Plane foreground backup Siegfried went finish third place height effect grass reduced Normally Guff would climb slowly launch stable Free Flight model first control command could delayed several minutes desired can sure learned lesson about launching wind important flight Later launching such wirrd handled quite easily same model long pilot controls start brother Bill controls instead Great Lakes ship radio operator would have flicked bit rudder before first stall Grant says further 20-mile wind crackup initial flight dis couraged other radio event contestants . evident experiences men least three four days should spent assembling testing before preparation flight days time proved insufficient prime cause lack successful flights radio models gusty weather clinched matter far flights concerned agreed statement would three years before time margin added meet schedule fact 1941 Nats would first set aside three days RC final standings 1938 Nats based ground demonstrations attemp ted flight follows 1 Walt Good Kalamazoo MI 2 Clinton DeSoto Granby CT 3 Howard Flanigan Detroit MI 4 Pat Sweeney Chicago IL 5 Michael Roll Dearborn MI though Guff given first place very satisfying win Thus end second Nats with much RC interest still no convincing demonstration actual maneuvers radio-controlled model plane3 1939 Nationals contrast 1938 Nats five RC entries 1939 Nats 16 11 actually showed up Wayne County Airport Detroit time RC event showed promise some real action Four 11 repeaters 1937 1938 Flanigan Gcod Lan zo Wasman newcomers Bieberman Leshner Mende Raspante Rose Siegfried Sonheim year judges would using point system first time ground points given workmanship control operation before actual flight flight points given several different maneuvers such cross-country return circles left right Figure8 others perfect score would net 100 points Left Earles 9-ft original REM three receivers Right Earle holdethe plane friend works control box table Transmitter located cars trunk pilots meeting judges decided would call out maneuver advance fast-talking pilot wouldnt get away describing what plane just donerather what sup posed contestant suggested model four vacuum tubes receiver should receive points receiver just tube course one-tube fliers objected judges ruled performance principal factor number parts Thank goodness models basic rudder control few also elevator control used new single RK62 gas-tube receiver Sigma relay escapement actuators trend rudder-only beginning emerge Goods weather perfect cumulus clouds very light breeze better brother Bill present first RC Nats having missed two before Gulf new fin rudder replace ments account 1938 Nats flight damage new lighter 05-oz escape ments two receivers rebuilt ver sions same Type 30 tube batteries anchored floor body instead being part receiver/relay package 1938 crash batteries integral receiver package proved decisively pound loose batteries could very destructive Lesson learned mount 80 Model Aviation Hemps Miss America RC fuselage Power Barker engine model placed fourth batteries separately 60 flights Guff several public demonstrations through out southern Michigan during 1938 high hopes might year true RC demonstration Bill pilot always took turns launched Guff running wing tip First judges called left circle followed right circle plane did both came cross-country return request plane climbed light breeze almost two minutes before judges said half-mile paint reached Bill steered 34-circle left followed -circle right headed back toward transmitter Guff soon arrived overhead com plete returnat point well over 1000 feet altitude Guff being turned back wind Figure-8 requested large left circle followed equal-sized right circle form 8 went smoothly Next Bill chose spiral dive stall optional stunt maneuver also went well home practicing spiral dive loop using just rudder control bit unreliable agreed use should mentioned though Guff both rudder elevator controls decided use rud derwith experi ence elevator receiver switched off elevator escapement pinned neutral required air maneuvers completed plane cruising 1500 feet thermal engine stopped 6 min normal 1941 next few minutes Bill repeated several maneuvers try better point score dont remember whether ploy helped control during glide worked well still altitude burn moment district radio inspec tor earlier checked ham licenses witnessing flight asked might have try stick keeping eyes plane Bill calmly asked him ham license reply No Sorry said Bill Fliers other events field collected around transmitter land ing area after word spread radio job air judges trying tell Bill make turns approach butt tell judge last task spot landing Bills job make turns saw fit get close possible Bill using steering technique keeping final turn before landing banked long possible giving quick opposite rudder level wings followedby neutral plane would float smooth landing did less 100 feet judges points awarded 89 out possible 1O0 What nice day flight Zak s 1939 Nats Book said under control9 Sure wasp moment took off until glided back its master worth coming Nationals just see historic per forniance5 Joe Raspante 11-ft Super Buc caneer set up flight Sal Taibi person ever saw could hand-launch giant plane over headnot wing tip Joes plane four-tube receiver rudder control beautifully crafted powered Forster 99 control box used telephone dial five com mands up/down right/left stop engine Since photos plane show no elevator flap believe rudder engine active controls used year flight lasted almost four minutes gathered total 11 points second RC flight made 1939 Nationals account states radio interference stopped engine prematurely Elmer Wasman short flight meet third place told later best RC demonstration took place dedication new airport southern Georgia shortly after Nats According notes total six pilots attempted flights day list below shows placed P1 Name Hometown Age Points 1 Walt Bill Good Kalamazoo MI 23 89 2 Joe Raspante Brooklyn NY 29 11 3 Elmer Wasman Jacksonville FL 30 9 4 Phillip Sonheim Niellsville WI 27 8 5 Charles Siegfried Wichita KS 42 8 6 Robert Mende Flint MI 22 8 7 Erwin Leshner Philadelphia PA 20 6 8 Jesse Bieberman Philadelphia PA 34 6 9 Howard Flanigan Detroit MI 54 1 10 Chester Lanzo Cleveland OH 25 1 11 Robert Rose Highland Park MI 190 1940 NatIonals entries actual flights surprises encountered event held Chicago time 11 planes appeared 16 entries least seven made scored flights Six entries May1986 81 Ault helmet RC Guff-type plane escapement control fifth George Karpovich adjusts Custom Cava lier featuring two-escapement control Clin ton DeSoto helps transmitter controls Left Ken Harker behind Purdue UniversItys 1 21/2ft entry Model demonstrated ground flown Center Harker transmitter used tone control three-channel operation Right 1 0-tube receiver electronic tone selectIon used Harker plane repeaters five newcomers Charlie SiegfrIed Siggy Wichita largest plane 15-ft span 1 3-lb weight Forster 99 power dubbed telephone exchange because its control system rudder elevator engine basically dial telephone simi lar Raspantes system dialing given set pulses airborne selector switch would energize desired electric motor give say left rudder signal turned off rudder would return neutral similar action operated ele vator different number pulses Engine control however remained throttle position set having no automatic neutral return feature airborne collection electronics motors gears selector batteries weighed 3 lb described CE Bohnenblust Charlies radioman QST magazine carried cover photo Charlies plane6 control box size small suitcase complete neck strap made him lcok like street vendor central stick controlled rudder elevator through mechanical pulse generator details revealed long cable box led trunk Siggys car 50-watt transmitter housed typical flight Siggy would start Forster 99 hoist giant plane onto Winnie Davis shoulder quickly don control box check systemalways talking steady stream Winnie would run full speed heave plane air show repeated times meets Siggy became special characters RC circuit can still remember flights plane went dutifully through required maneuvers drifting down wind whole time finally disappearing behind trees outside airfield Spot landings thing controls did work time Siggy eamed second place closest top ever reached proud Joe Raspaate followed Siggy third place very respectable flight Super Buccaneer Jim Tom Custia Wisconsin tcok fourth place original 8-ft cabin plane weighed about 10 lb Power twin-cylinder engine built friend Ed Schunke Earlier tried Forster 99 didnt have enough power suit Tom built radio system control rudder engine7 two control channels gave variable positions based clever sequenced-selector-pulse systemalmost proportional control receiver used RK62 tube home made polarized relay servos Pittman permanent magnet motors using Continued page 171 82 Model Aviation TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals A/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED RC History/Good Continued page 82 lead-screw speed reduction transmit ter control box called wheatfield because dozen clattering relays generate pulses Hmmmdigital con trol Jim being older assumed posi tion pilot made several RC flights just before Chicago Nats Im allowed mention ended treesomething about missed pulse Toms system However day Nats Jim report summer job Lake Michigan ship Tom became pilot official flight Tom says plane got air OK made two maneuvers before ship turned wrong way went ground8 good enough fourth place Tom recently retired General Elec tric Syracuse Jim thinking about retiring job patent lawyer Milwaukee Ben Shereshaw Several planes threefunction controls rudder elevator motor REM unusual Shereshaws twin-boom pusher called RC-1 Cecil Winick Radio Control Headquarters RCH attended ad justments RCH receivers motorized escapements What pretty plane Fifth place John Ault enlarged Buccaneer awarded sixth place using escape ment rudder control Phil Sonheim another REM ship 9-ft mid-winger housed completely homemade selector electric motor system very neat compact took ninth place leamed later uncle Dick Son heim well-known present-day AMA lead er RC system never published probably because Phil turned skills secret war work shortly after Nats Im told died during war under rather mysterious circumstances pursuing work States Goods second time brother Bill able team Nats felt Guff better shape beforeand pilots hundred flights stick practice Some public demonstrations several meets Illinois Michigan Ohio Canada What surprise Bill found waiting us after first night Sherman Hotel After breakfast Wednesday morning went car hotel lot found hole Guff wing stored just beneath car ceiling dad said binoculars gone Bill said Wheres transmitter gone too After few hours discussion hotel management local police became clear recovery stolen items extremely unlikely What next question RC event scheduled next morning Thursday Bill said Walt fix wing Ill build transmitter Thats what happened Bill went Newark Radio Store State Street explained problem manager said lots parts would night inventoryand workbench back room oouldnt believe Bill never worked fast home morning came forth two radio tubes 4-ftsq piece plywood along bunch coils parts reminded overnight transmitter should touched because 400 volts exposed everywhere almost forgot temporary control box Ken Davis rigged up 400 volts too survived somehow way RC site 79th Keeler stopped open field make quick distance test OK after some tuning site word spread about stolen transmitter several fliers offered use Joe Raspante guy beaten out first Save old Timer Podp5jtiqUO si6~ GbaflW0From this.k sped rtmers potfltS Ian9 Mode Engine Parts Only Over 600 items Send *200 current catalog pAN AR 05pA C 200/o Greater Heat Resistance Impervious Exhaust Products Eliminate Burned Up & Blown Out Silicone SEND 4 SOperS/8 D Coupler or500per3/4 ID DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54580 May1986 171 III PROP ASSEMBLY #1 09-ELECTRIC ONLY PROP HUB ASSEMBLY #IOOA 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #100A Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair POOP HUB ASSEMBLY # 110 051 engines electric motor equivalent WeightS grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP 1101 ASSEMBLY N 111 0 engines electric motor equivalent 20 grams$2000 PROP BLADES FOR HUB N 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line FAI RUBBER Sizes 114 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber mdse add $1 50 UPS Over $lSaddlO% Phone O213 830-8939 H377-1959 P30 HEADQUARTERS Special kit/rubber combos NEW NEW P30 prop $2495 Coupe deVIIIe Finished prop Very very complete Tilka____ Wakefield22Fe shed F Oct End_______ KSB TIMERS Fuel Shutoff 3Osec-$1195 BminDT-$1195 $3895 plus $250 UPS Send $100 1986 Catalog F Model Supply L7 P0 Box 3557 Torrance CA 90610 NEW FROM FOX 15X 15 RC featuring all-new Mark X carburetor 42 9O muffler #21500 Bore590 Stroke . 540 Weight 45 oz RPM 7-5 prop14000 muifler installed RPM 8-4 prop 13000 muffler installed lightest weight lowest cost 15 can buy now boasts all-new Marki carburetor better-than-ever per formance Runs best lO/o nitro fuel little jewel still compact enough light enough fit models designed 09s 10s VISA Mastercard Accepted F0x MFG Co 5305 TOWSON AVE 0RT SMITH AR 72901 5011 646-1656 Easiest Hinge Install Now available scale size PRO HINGEJ use cyanoacrylate adhesives No pinning messy epoxyInstant glues neededSpecial Paper No special hinge slotter needed No alignment necessary stic Special Paper RADIO SOUTH Inc 43 West Nine Mile Rd Pensacola FL 32414 904 478-6745 place year before real sports manship Ive always very warm feeling Joe ever since cant say same Sherman Hotel meet decided fly rudder though overnight trans mitter two channels before did use elevator newly-installed throttle control Actually Guff carried two separate receivers option rudder/elevator rudder/engine might have earned some extra points Fortunately opportunity make several flights meet almost pulled off secret maneuver inside loop practicing home field using rudder con trol began using full left rudder start left circle spiraled tighter steeper turn during model picked up considerable speed nose pointing down steeply gave opposite rudder just long enough stop turn held neutral nose rotated rapidly vertical position plane stalled fell over its back recovered level flightmaldng pear-shaped loop9 meet engine quit top stall model flopped down going neatly over its back Luckily altitude sufficient glide back within 20 ft spot maxi mum landing points Note final points listed below lower year before time judges required give fewer points poorly-executed maneuvers Further Leo Weiss judges taldng postmans holiday RC target drone job Wright Field P1 Name 1 Walt Bill Good 2 Charles Siegfried 3 Joe Raspante 4 Jim Tom Custin 5 Ben Shereshaw 6 John Ault 7 Phil Sonheim 8 Elmer Wasman 9 Lester Helle 10 Jesse Bieberman 11 Bob Reder Controls R REM REM REM REM R REM R R R R Points 65 49 34 23 19 17 13 12 11 10 6 1941 Nationals event Chicago July 1-6 fifth RC last prior WW II Up time biggest best ever held field 26 RC entries yielded 12 scoring pilots three repeaters nine newoomers eight total 40 flights over three-day period first time extra days allowed tuning preparations poor weather other delays fortunate first two days plagued windy weather Siegfried Ault Reder repeaters names new comers will emerge go Bill attended meet did enter plane highly-inter ested spectators Bill honey moon finishing PhD research thesis Based sensible priorities neither us should have just couldnt miss time newcomer took first place Jim Walker Fireball Control Line fame Portland OR remembered preceding 1940 Nats Jim spent time carefully observing RC event helped Elmer Wasman launch plane Also several 1940 photos showed Jim critically watch ing RC planes judges Rumors Walkers preparations RC model leaked Bill through some letters Ed Rockwood rabid RC experimenter West Coast rumor mentioned new system called proportional control something dreamed about never seen would new exciting true Jim Walker Sure enough entry small 7-ft ship proportional rudder proportional engine speed used two standard RCH receivers relays very clever way engine control simpler two controls used two sets breaker points engines ignition system set high speed other low speed led primary spark coil wire through relay contacts two timer points Signal oft save low sneed save hish sneed RC $249/pkg 18 Scale $449/pkg 24 neat part pulsing channel gave intermediate speed Theres Changing pulsing dwell time pro duced speed between low high medium speed engine emitted distinc tive burping sound jumped between high low speed rudder channel used dwell-time pulsing used small electric motor driving through fluid coupler rudder pulled left side spring oft signal rudder left signal right Dwell-time pulsing gave 50/50 ratio neutral rudder varying pulse ratio gave desired position full left full right truly propor tional rudder following control stick first contest demonstration dual-proportional system using two independent radio channels model plane Furthermore Jim squeezed equipment small time 7-ft plane weighed 5 lb fully loaded did first taxi maneuvers ever seen proportional systemeven bumpy dirt road tricycle landing gear helped accomplishment Walker awarded 88 points out possible 100 air maneuvers spot landings taxiing clear Walkers last flight carried smoke bomb simulate skywriting skillful competitor RC competitors later Arthur Earle Close behind Walker next plane earned 83 points second place five-point gap differ ence between assisted takeoff 5 points taxi takeoff 10 points Earles 9-ft plane powered Ohlsson 60 used three controls REM original design andget thishis first model plane three controls actuated escapements three sepa rate receivers flying very con sistent spot landings stopped within 54 ft spotexcellent days Earl newcomer knowledge never flew again National Contest Charlie Siegfried using 1940 plane took third place higher score second place year before managed large loop may have first recognizable performed Nationals Ken Harker modem plane brought two electrical engineering stu dents Purdue University attracted great attention its complete complex control system Harker Dick Symonds designed built 14-tube receiver five audio channels rudder ele vator engine controls Selective audio circuits directed command signal desired electric motor control surface No sequence system delays electronic equivalent tuned-reed system used Leo Weiss 1937 ground checkout demonstrated control direction could quickly chosen control surface speed seemed quite slow us since travel time neutral full deflection about four seconds0 12-ft plane sported sleek racertype body 3A-hp Mercury Avia en gine disappointing us flown meet whole system beautifully crafted though Bill didnt bring plane satisfaction seeing two dupli cates 8-ft Guff meetthe first meet two look-alike planes present John Ault flew Guff seven times meet fifth place 50point score called plane Spook gave no explanation why2 now actively retired Arkansas Mike Thomas Pittsburgh RC Contest Director Frank Zaic Harry Copeland judges names other officials couldnt found reference material final standings P1 Name Plaae Equipment Points 1 Jim Walker 7-ft trike gear RM proportional 88 Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blend4 Chnices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balinons FILLER SB SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS r Over 1000 ToolS FREE Catalog I4FROM MicroMark Small Tool Specialists yao asa miniature issla pselt find t~atstaeeting asians ear new MiCNOMANK cafaingl Mann teals hard-ta-find . mann HUGE DISCOUNTS Na mere searctdag frnm stare fanfare New enerynhina pan need clone peer mailbas Save time sane macen Use coupon mend name addresa MICROMARK ass vi 12-201 94 Cant Main 5t Chases NJ sanee I I assneasI tnt _________________________________ snese ______ sip I L1 May1986 173 found talented showman midable opponent Only Way Iy Fabtronics Mark 3 CDI pointless system Works Great Most 2 4 Cycle engines Automatic Spark control now avaitabte moat 4 cycte engines comptene System Batteries non mci69 add $3 poss & HendI FABTRONICS 375 Isle Royal Rd Calesburg IL 61401 2541 NE 11th Court ano Beach Florida 33062 e 305 941-9119 AVAILABLE FROM LEADING DEALERS AND DISTRUBUTORS DIRECT 2 Arthur Earle 9-ft orig REM3esc 83 3 Charles Siegfried 15-ft orig REMselec tor 77 4 Marvin Hemp Miss America RE2esc 73 5 John Ault 8-ft Guff RM2esc 50 6 George Karpovich Custom Cavalier RM 2esc 39 7 HD Edwards 9-ft Cavalier RM2 elect mot 29 8 Bob Reder 8-ft Sailplane Rlesc 13 9 Ken Harker l2-ft orig REMtones 9 10 Clark Hile 8 pts 11 Cecil Winik 6 pts 12 Allen Trinuner 5 pts R er E ator M r account five-year history RC event AMA National Contest makes plain Radio Control arrived time 1941 event small new distinct category model plane family measure rapid buildup near end period number RC flights40 flights 1941 compared total 10 flights previous four years Receivers Technically airborne radio gear still highly experimental extremely fussy Tuning adjusting finicky sets occupied much contest time example receivers 45-volt B battery dropped little volt tuning relay settings redone single-tube receivers both Type 30 vacuum tube RK62 gas tube could coaxed job needed time superregenerative mode opera tion highly resistant spark ignition usually no problem Other types detector modes used three- four-tube sets did fare well extra audio tubes ad versely affected vibration especially powered models Relays Commercial units heavy expensive sensitive vibration mar ginally adequate small plate current changes available receivers Homemade relays fared better tail ored particular receivers use remember brother Bill wrote article 1940 QST magazine giving construction details homemade DG-6 polarized relay received hun dreds requests hams informa tion availability purchasing13 think fact stated built relays 500 350 magnet 150 fine wire grabbed atten tion labor winding half-mile fine wire small form forming metal parts included cost Later Sigma other commercial relays came available Control systems used during period varied may grouped several categories follows 1 Escapements ranging size oz 4 oz seen rapid positive over half models Some used escapement rudder alone others used up three channels giving rudder elevator mo tor REM Escapements would prove around years come would appear various clever arrangements 2 Sequential selector systems worked like dial telephone used Siegfried Wasman Sonheim others group pulses received selector would connect power specific control surface electric motor would move surface desired direction gave multiple controls single channel slow operated control surface timeprobably better slow boat fast airplane 3 Non-sequential selectors such Weiss 1937 tuned reeds would become very popular 195 Os time delay selecting control fraction second Harkers electronic tone selec tion system similar result Both planes ahead time such ambitious projects enormity complexity efforts involved caught unproven contest time 4 Walkers proportional pulsing also ahead its time demonstrated superbly its effective control capability DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 83401 314 221-8803 aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40 SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE 174 Model Aviation PRODUCTS FOR THE DISCERNING MODELER DYNATHRUST PROPS look great too! ALL FUTURE PRODUCTION ON ALL SIZES WILL HAVE LOGO AND TIPS PAINTED SIZES CURRENTLY AVAILABLE 13x6 15X6r 8 $700 18x6 8r 10 0 22x8 10 0 14x6 16X6 8 $800 20X6r 810 0 AddlSizesAvailobleSoonf .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74r3pak$495 4Q4r INTERCEPTOR Folding Wing Gilder U-Build-It Kit $395 4 Ready Fly $795 Add $3 postage handling first additional P0 Box68132 AIRCRAFT Co Portland OR 97268 Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship PrformanC 020 Inglnes FeeFlighl Rubber Pulse small Multi Channel R/C systems suItable 50 pears ago mas very capable aircraft mell$2195 proportioned stable model flight ao interestingKIT #102 design lending itself balsa strontaral techeiqoes Wev aol e wrale line 01 rear tavorites please send 505 tnt Flyline Cetalco prone 17031 273-0503 Sea ens ano Oistibators neited FLYLINE MODELS INC PO Box 2136 Fairfax VIrginia 22031 Transmitters easiest part RC systems since unusual limits weight size Power outputs five 40 watts normal almost used 5 6-60 MHz ham band Thanks ARRL pio neering hams having frequencies basic equipment available right time course would have better simpler radio licenses available need would solved after WW II AMA FCC developed no-exam RC license lessons learned pre WW II years five AMA National Contest RC competitionsand viable RC systems developed pioneers less-successful pioneers showed us directions followthereby help ing others avoid Undoubtedly RC development would have progressed much slowly stimulation provided contests Thanks AMA supporting organizations indi viduals made RC meets possible include Detroit Exchange Club Polks Steve Corbetts Chicago Parks Frank Nekimkens many others period next AMA Nats RC meet would take place until after end WVT II 1946in Wichita KS follow ing decades would see giant leap growth rate AMA membership num bers due primarily bursting popu larity RC competition event period still another storyor group stories Acknowledgements Thanks wife Joyce brother Bill son Terry supportand others helped research series References DeSoto Clinton B QST October 1938 Air Trails May 1939 2Grant CH ModelAirplane News September 1938 3Good Walter Air Trails January 1939 4Good William QST March 1940 Zaic Frank Walter Farynk National Model Airplane Meet Pictures 1939 6Bohnenblust CE QST August 1940 7Custin James R Model Airplane News Au gust September 1947 Custin J T Inverview September 18 1985 9Good Walter Win Air Trails November December 1940 January 1941 0DeSoto Clinton B QST September 1941 little device sounds steady beep guide right plane Easily mounts smallest planes Use connector plug receiver same servo Also tells someone frequency solid state crystal oscillator Comes ready mount full structions included WT 1 oz DIM 1 x2 3/8 x 3/4 MADE IN USA CLUB DISCOUNTS AVAILABLE * ASK * F3H IntI/JoIIy Continued page 86 Rudnick two complete 21km course managed come home minute faster Rud nick Official flying began Monday Decem ber 9 would like travel way around world contest have SEND CHECK OR MONEY ORDER TO ELECTRONIC DESIGNS INC BOX Z 1925 GREENWOOD LK TPK HEWITT NEW JERSEY 07421 PHONE 201 7281616 Plus $200 Shipping cont USA NJ Residents add 6% Sales Tax COD add $200 Allow 2 wks Shipping May1986 175 lightweight package Later other mechanDavis Al ModelAirplane News Septemlr isms single dual proportional sys 1941 tems would become popularKulick Harold Model Airplane News Oc 5 earlier slow-cycling systems used tober 1941 1937 planes Lanzo Good didnotGood William bc cit reappear after first year indicating other methods considered effec tive 1EEV ONLY
Edition: Model Aviation - 1986/05
Page Numbers: 76, 77, 78, 79, 80, 81, 82, 171, 172, 173, 174, 175
THE 1937 NATIONAL CONTEST re vealed preceding installment beginning steps RC model plane development blend two different hobbies gas-powered model planes amateur radio modeler needed produce stable controllable plane could easily carry radio gear radioman needed produce airborne radio gear tolerate environment vibration ignition noiseand hard land ings Only few individuals possessed both skills early efforts utilized least two persons stories next four Nats starting 1938 will highlight advancements happened just six entries 1937 number climbed 26 1941 year some old hands would reappear 1938 RC successes burst forth especially final prewar meet 1941 1938 Nationals second AMA Nats RC event Detroit July 9 1938 five entries Two veterans 1937 event Pat Sweeney Walt Good Chet Lanzo 1937 winner did enter time Elmer Wasman spectated due receiver problems Leo Weiss B Schiffman didnt show three new comers Clinton DeSoto Howard Flanigan Mike Roll DeS oto giant 25-lb Cub 14-ft span twin Forster engine two controls rudder elevator required four separate receivers using new RK62 three-part series concluded issue author has taken us first RC event atthe 1936 National Con test year AMA founded 50 years ago final prewar Nats 1941 Offering RC first time may have pure optimism no entrants RC established itself forever dynamic modeling class just five years later Part 3 alt Good Histryot RC Flying newcomers would arrive bolster ranks No person actually entered five prewar Nats RC events Although Wasman Good attended five officially flew four However enough repeaters present meet develop camaraderie among pioneers closeness still remains today 50 years later meet well review top fliers equipmentand observe de velopment trends toward success Fi nally well witness moments Raytheon gas tube one-tube superregen circuit Sigma relay Four transmitters four separate frequencies 56-60 MHz used operate receivers give left/right up/down flight control no signal control surfaces remained last positions No provision made automatic return neutral positions hind sight tells us non-neutral-return system may have difficult fly early stage RC Two reversible motors operated rud der independently simultaneously desired Everyone anxious see behemoth fly Total radio payload 4 lb Before Nats total flight weight 28 lb 10-in-dia wheels steel landing gear lightened bring weight just under RC event limit 25 lb maximum1 very disappointed giant Cub wasnt flown day Ive learned whether Cub ever flown 76 Model Aviation Left WaltGood RC Guff new bodyforthe 1938 Nats LesterGood Pop left ham operator Kreiiick right Right Aithough external damage plane mild lnternai damage receivers appeared awesome repaired used again Goods radio equipment 1938 Ciockwise right receiverwith Type 30 tube sensI tive relay escapement Au homemade picture taken Kalamazoo Airport few weeks afterthe 1938 Nats crash shows Walt amiiing No wonder Guff re built Rxsee side window fiying again 1938 Left DeSoto Cub second 1938 Nats sits Wayne County Airport hangar Wing 25-lb model can seen back ground Center Four RK-82 receivers controlled Cubs rudder elevator Right Cub fuselage outside hangar Its biggie Goods Big Guff new fuselage big radio compartment 12 x 15 x 6 allow easy access airborne gear relays actuators changed 1937 rig Homemade polarized relays lightweight balanced armatures resistant engine vibration would operate reliably current change iampere actuators changed homemade four-spoke escape ments mounted directly fin hori zontal stabilizer allowing very short direct mechanical connection control surfaces 1-az escapement posi tive positions very fasta few tenths second position old cycling actuator took over 3 sec lacked positive home positions Both rudder elevator op erable However rudder ac tually connected 1938 meet Howard Flanigans plane 8-ft span two large four-spoke escapements cabin rudder elevator control used two RK62 receivers 56 60 MHz Brown Jr power Pat Sweeney brought new plane Custom Cavalier well-established design Free Flight Gas arena believed used some 1937 gearwith rubberband-driven escapement rudder control Mike Roll ancient photo album see RC plane streamlined shoulder-wing type similar Cavalier used rudder control Strangely much detail written about equipment early RC models partly because re porters werent very knowledgeable about RC partly because RC event re ports brief order share space other events Nats Radio Control event Satur day July 9 windiest day Nats pioneers liked RC didnt like much wind Good ship chalked up about 30 flights since last Nats gained confidence new controls decided give try keep account 1939 flight accurate unbiased turn description Charlie Grant editor Model Airplane News2 Toward end Saturday afternoon after diligent work during entire day Walter Good radio-controlled mod el prepared flight demonstrated efficiency radio mechanism ground worked perfectly great praise due young man unique efficient mechanism em ployed Paul Kreilick radio operator shares honor mechanism complete efficient has exhibited Finally undertook fly ship though wind blowing about 20 miles per hour very gusty difficult because novelty type ship keep spectators rushing May1986 77 Left Howard Flanigan hat hIs 8-ft cabin plane two controls placed third 1938 Right Flanigans setup used two Sigma relays top two escapements bottom fastened wooden bulkhead fitted Inside cabin Left Bill Good holds Guff fuselage next new 20-watt transmitter storage bat tery 400-volt genemotor Thats portable believe new fin/rudder also added 1939 Center homemade escapement used Guff fin stab rudder elevator control also new 1939 RIght Cutaway view rud der escapement mounted Guff fin Escapement sketched oversize show details 1939 group endeavoring prepare models flight However finally model taken field motor started took off Unfortunately grass quite long some caught elevator flap deflected takeoff model immediately went stall recovered However seoond stall after zoom turned over its back made complete loop meantime Walter endeavor ing 100-yard dash back operating mechanism means hoped remedy disastrous condi tions flight Unfortunately though bottom loop model hit ground just before nosed up before Walter oould oontrol ship ship complete washout radio apparatus inside ship looked someone stirred around concrete mixer tail part mechanism damaged nose pushed spite damage hours work gone model Walter still smile commend him highly must admit smile partly fake because kicking myself being near transmitter end launch carefully instructed radio helper Paul Kreiick W8QQE hold control box oould grasp easily after galloped back launchand cautioned him move switch because never flown plane before touch rudder would have corrected stall placing Guff circling 1940 Left Biebermans transmitterwith V antenna sits top car atthe 1939 Nats Right Biebermans one-tube receiver seen through transparent panei fuseiage 78 Model Aviation Left Joe Raspanti ground-tests Super Buccaneer second 1939 Nats Note tripod-mounted controi box Center controi box used teiephone dial Rudder engine controls dialed Right four-tube receiver sensitive relay inside cabin Left Phil Sonheim fourth 1939 helper shown holding receiver package plane uncle present-dayAMA leader Dick Sonheim Right Elmer Wasman makes always-required adjustments entry just before placing third Wasmans fuselage carried RK-62 tube receiver escapement rudder didnt make successful 1939 Nats flight Irwin Leshners RC entry 1939 Nats 1940 flight dont really believe long grass deflected takeoff Grant suggested Since wing-tip-assisted launch finally released shoulder Left Phil Sonheim 9-ft 3-ch piano Right close-up homemade selector device Note use bulkheads compartments separate heavy equipment Left Wasman launches model wing tlpfrom plywood runway Model hitthe background weeds Jim Walker sits foreground Right Bob Rederand radioman pylon modelrudder-only controls May1986 79 Left Bill Good built two-channel transmitter overnight local electronics store won meet next day Center Bill Wait prepare RC Guff flight fitted rudder elevator engine control rudderwas used 1940 Nats Right Bill tuning receiver meter priorto flighta standard necessary procedure early days Photo byAl Daraghy IegTrIeaspIanewItn -orsieranaseIec tor telephone exchange behind windows Left Custin brothers Tom Jim fourth 1940 Nats 8-ft model Right Tom Custin holds 3-lb RC receiver controlsall removable unit Lull uruuruuw IUUU 1anwith Cecil Winik helping Right JohnAultandeniargedRCBuccaneerBth RC-1 wuih covers removed 5uuwu three motorizeu udpemOnts two ono-tube receivers 1941 Jim Walkers 1941 Nate winnerwith just 7-ft span pulse proportional control rud der engine speed featured trike landing gear powered Brown Jr Left Winnie Davis launches Siggys 1 4-lb RC plane Right Siegfrieds 50-watt transmitter can seen sitting cartrunk control console ground tall 1 4-footerln background Plane foreground backup Siegfried went finish third place height effect grass reduced Normally Guff would climb slowly launch stable Free Flight model first control command could delayed several minutes desired can sure learned lesson about launching wind important flight Later launching such wirrd handled quite easily same model long pilot controls start brother Bill controls instead Great Lakes ship radio operator would have flicked bit rudder before first stall Grant says further 20-mile wind crackup initial flight dis couraged other radio event contestants . evident experiences men least three four days should spent assembling testing before preparation flight days time proved insufficient prime cause lack successful flights radio models gusty weather clinched matter far flights concerned agreed statement would three years before time margin added meet schedule fact 1941 Nats would first set aside three days RC final standings 1938 Nats based ground demonstrations attemp ted flight follows 1 Walt Good Kalamazoo MI 2 Clinton DeSoto Granby CT 3 Howard Flanigan Detroit MI 4 Pat Sweeney Chicago IL 5 Michael Roll Dearborn MI though Guff given first place very satisfying win Thus end second Nats with much RC interest still no convincing demonstration actual maneuvers radio-controlled model plane3 1939 Nationals contrast 1938 Nats five RC entries 1939 Nats 16 11 actually showed up Wayne County Airport Detroit time RC event showed promise some real action Four 11 repeaters 1937 1938 Flanigan Gcod Lan zo Wasman newcomers Bieberman Leshner Mende Raspante Rose Siegfried Sonheim year judges would using point system first time ground points given workmanship control operation before actual flight flight points given several different maneuvers such cross-country return circles left right Figure8 others perfect score would net 100 points Left Earles 9-ft original REM three receivers Right Earle holdethe plane friend works control box table Transmitter located cars trunk pilots meeting judges decided would call out maneuver advance fast-talking pilot wouldnt get away describing what plane just donerather what sup posed contestant suggested model four vacuum tubes receiver should receive points receiver just tube course one-tube fliers objected judges ruled performance principal factor number parts Thank goodness models basic rudder control few also elevator control used new single RK62 gas-tube receiver Sigma relay escapement actuators trend rudder-only beginning emerge Goods weather perfect cumulus clouds very light breeze better brother Bill present first RC Nats having missed two before Gulf new fin rudder replace ments account 1938 Nats flight damage new lighter 05-oz escape ments two receivers rebuilt ver sions same Type 30 tube batteries anchored floor body instead being part receiver/relay package 1938 crash batteries integral receiver package proved decisively pound loose batteries could very destructive Lesson learned mount 80 Model Aviation Hemps Miss America RC fuselage Power Barker engine model placed fourth batteries separately 60 flights Guff several public demonstrations through out southern Michigan during 1938 high hopes might year true RC demonstration Bill pilot always took turns launched Guff running wing tip First judges called left circle followed right circle plane did both came cross-country return request plane climbed light breeze almost two minutes before judges said half-mile paint reached Bill steered 34-circle left followed -circle right headed back toward transmitter Guff soon arrived overhead com plete returnat point well over 1000 feet altitude Guff being turned back wind Figure-8 requested large left circle followed equal-sized right circle form 8 went smoothly Next Bill chose spiral dive stall optional stunt maneuver also went well home practicing spiral dive loop using just rudder control bit unreliable agreed use should mentioned though Guff both rudder elevator controls decided use rud derwith experi ence elevator receiver switched off elevator escapement pinned neutral required air maneuvers completed plane cruising 1500 feet thermal engine stopped 6 min normal 1941 next few minutes Bill repeated several maneuvers try better point score dont remember whether ploy helped control during glide worked well still altitude burn moment district radio inspec tor earlier checked ham licenses witnessing flight asked might have try stick keeping eyes plane Bill calmly asked him ham license reply No Sorry said Bill Fliers other events field collected around transmitter land ing area after word spread radio job air judges trying tell Bill make turns approach butt tell judge last task spot landing Bills job make turns saw fit get close possible Bill using steering technique keeping final turn before landing banked long possible giving quick opposite rudder level wings followedby neutral plane would float smooth landing did less 100 feet judges points awarded 89 out possible 1O0 What nice day flight Zak s 1939 Nats Book said under control9 Sure wasp moment took off until glided back its master worth coming Nationals just see historic per forniance5 Joe Raspante 11-ft Super Buc caneer set up flight Sal Taibi person ever saw could hand-launch giant plane over headnot wing tip Joes plane four-tube receiver rudder control beautifully crafted powered Forster 99 control box used telephone dial five com mands up/down right/left stop engine Since photos plane show no elevator flap believe rudder engine active controls used year flight lasted almost four minutes gathered total 11 points second RC flight made 1939 Nationals account states radio interference stopped engine prematurely Elmer Wasman short flight meet third place told later best RC demonstration took place dedication new airport southern Georgia shortly after Nats According notes total six pilots attempted flights day list below shows placed P1 Name Hometown Age Points 1 Walt Bill Good Kalamazoo MI 23 89 2 Joe Raspante Brooklyn NY 29 11 3 Elmer Wasman Jacksonville FL 30 9 4 Phillip Sonheim Niellsville WI 27 8 5 Charles Siegfried Wichita KS 42 8 6 Robert Mende Flint MI 22 8 7 Erwin Leshner Philadelphia PA 20 6 8 Jesse Bieberman Philadelphia PA 34 6 9 Howard Flanigan Detroit MI 54 1 10 Chester Lanzo Cleveland OH 25 1 11 Robert Rose Highland Park MI 190 1940 NatIonals entries actual flights surprises encountered event held Chicago time 11 planes appeared 16 entries least seven made scored flights Six entries May1986 81 Ault helmet RC Guff-type plane escapement control fifth George Karpovich adjusts Custom Cava lier featuring two-escapement control Clin ton DeSoto helps transmitter controls Left Ken Harker behind Purdue UniversItys 1 21/2ft entry Model demonstrated ground flown Center Harker transmitter used tone control three-channel operation Right 1 0-tube receiver electronic tone selectIon used Harker plane repeaters five newcomers Charlie SiegfrIed Siggy Wichita largest plane 15-ft span 1 3-lb weight Forster 99 power dubbed telephone exchange because its control system rudder elevator engine basically dial telephone simi lar Raspantes system dialing given set pulses airborne selector switch would energize desired electric motor give say left rudder signal turned off rudder would return neutral similar action operated ele vator different number pulses Engine control however remained throttle position set having no automatic neutral return feature airborne collection electronics motors gears selector batteries weighed 3 lb described CE Bohnenblust Charlies radioman QST magazine carried cover photo Charlies plane6 control box size small suitcase complete neck strap made him lcok like street vendor central stick controlled rudder elevator through mechanical pulse generator details revealed long cable box led trunk Siggys car 50-watt transmitter housed typical flight Siggy would start Forster 99 hoist giant plane onto Winnie Davis shoulder quickly don control box check systemalways talking steady stream Winnie would run full speed heave plane air show repeated times meets Siggy became special characters RC circuit can still remember flights plane went dutifully through required maneuvers drifting down wind whole time finally disappearing behind trees outside airfield Spot landings thing controls did work time Siggy eamed second place closest top ever reached proud Joe Raspaate followed Siggy third place very respectable flight Super Buccaneer Jim Tom Custia Wisconsin tcok fourth place original 8-ft cabin plane weighed about 10 lb Power twin-cylinder engine built friend Ed Schunke Earlier tried Forster 99 didnt have enough power suit Tom built radio system control rudder engine7 two control channels gave variable positions based clever sequenced-selector-pulse systemalmost proportional control receiver used RK62 tube home made polarized relay servos Pittman permanent magnet motors using Continued page 171 82 Model Aviation TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals A/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED RC History/Good Continued page 82 lead-screw speed reduction transmit ter control box called wheatfield because dozen clattering relays generate pulses Hmmmdigital con trol Jim being older assumed posi tion pilot made several RC flights just before Chicago Nats Im allowed mention ended treesomething about missed pulse Toms system However day Nats Jim report summer job Lake Michigan ship Tom became pilot official flight Tom says plane got air OK made two maneuvers before ship turned wrong way went ground8 good enough fourth place Tom recently retired General Elec tric Syracuse Jim thinking about retiring job patent lawyer Milwaukee Ben Shereshaw Several planes threefunction controls rudder elevator motor REM unusual Shereshaws twin-boom pusher called RC-1 Cecil Winick Radio Control Headquarters RCH attended ad justments RCH receivers motorized escapements What pretty plane Fifth place John Ault enlarged Buccaneer awarded sixth place using escape ment rudder control Phil Sonheim another REM ship 9-ft mid-winger housed completely homemade selector electric motor system very neat compact took ninth place leamed later uncle Dick Son heim well-known present-day AMA lead er RC system never published probably because Phil turned skills secret war work shortly after Nats Im told died during war under rather mysterious circumstances pursuing work States Goods second time brother Bill able team Nats felt Guff better shape beforeand pilots hundred flights stick practice Some public demonstrations several meets Illinois Michigan Ohio Canada What surprise Bill found waiting us after first night Sherman Hotel After breakfast Wednesday morning went car hotel lot found hole Guff wing stored just beneath car ceiling dad said binoculars gone Bill said Wheres transmitter gone too After few hours discussion hotel management local police became clear recovery stolen items extremely unlikely What next question RC event scheduled next morning Thursday Bill said Walt fix wing Ill build transmitter Thats what happened Bill went Newark Radio Store State Street explained problem manager said lots parts would night inventoryand workbench back room oouldnt believe Bill never worked fast home morning came forth two radio tubes 4-ftsq piece plywood along bunch coils parts reminded overnight transmitter should touched because 400 volts exposed everywhere almost forgot temporary control box Ken Davis rigged up 400 volts too survived somehow way RC site 79th Keeler stopped open field make quick distance test OK after some tuning site word spread about stolen transmitter several fliers offered use Joe Raspante guy beaten out first Save old Timer Podp5jtiqUO si6~ GbaflW0From this.k sped rtmers potfltS Ian9 Mode Engine Parts Only Over 600 items Send *200 current catalog pAN AR 05pA C 200/o Greater Heat Resistance Impervious Exhaust Products Eliminate Burned Up & Blown Out Silicone SEND 4 SOperS/8 D Coupler or500per3/4 ID DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54580 May1986 171 III PROP ASSEMBLY #1 09-ELECTRIC ONLY PROP HUB ASSEMBLY #IOOA 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #100A Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair POOP HUB ASSEMBLY # 110 051 engines electric motor equivalent WeightS grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP 1101 ASSEMBLY N 111 0 engines electric motor equivalent 20 grams$2000 PROP BLADES FOR HUB N 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line FAI RUBBER Sizes 114 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber mdse add $1 50 UPS Over $lSaddlO% Phone O213 830-8939 H377-1959 P30 HEADQUARTERS Special kit/rubber combos NEW NEW P30 prop $2495 Coupe deVIIIe Finished prop Very very complete Tilka____ Wakefield22Fe shed F Oct End_______ KSB TIMERS Fuel Shutoff 3Osec-$1195 BminDT-$1195 $3895 plus $250 UPS Send $100 1986 Catalog F Model Supply L7 P0 Box 3557 Torrance CA 90610 NEW FROM FOX 15X 15 RC featuring all-new Mark X carburetor 42 9O muffler #21500 Bore590 Stroke . 540 Weight 45 oz RPM 7-5 prop14000 muifler installed RPM 8-4 prop 13000 muffler installed lightest weight lowest cost 15 can buy now boasts all-new Marki carburetor better-than-ever per formance Runs best lO/o nitro fuel little jewel still compact enough light enough fit models designed 09s 10s VISA Mastercard Accepted F0x MFG Co 5305 TOWSON AVE 0RT SMITH AR 72901 5011 646-1656 Easiest Hinge Install Now available scale size PRO HINGEJ use cyanoacrylate adhesives No pinning messy epoxyInstant glues neededSpecial Paper No special hinge slotter needed No alignment necessary stic Special Paper RADIO SOUTH Inc 43 West Nine Mile Rd Pensacola FL 32414 904 478-6745 place year before real sports manship Ive always very warm feeling Joe ever since cant say same Sherman Hotel meet decided fly rudder though overnight trans mitter two channels before did use elevator newly-installed throttle control Actually Guff carried two separate receivers option rudder/elevator rudder/engine might have earned some extra points Fortunately opportunity make several flights meet almost pulled off secret maneuver inside loop practicing home field using rudder con trol began using full left rudder start left circle spiraled tighter steeper turn during model picked up considerable speed nose pointing down steeply gave opposite rudder just long enough stop turn held neutral nose rotated rapidly vertical position plane stalled fell over its back recovered level flightmaldng pear-shaped loop9 meet engine quit top stall model flopped down going neatly over its back Luckily altitude sufficient glide back within 20 ft spot maxi mum landing points Note final points listed below lower year before time judges required give fewer points poorly-executed maneuvers Further Leo Weiss judges taldng postmans holiday RC target drone job Wright Field P1 Name 1 Walt Bill Good 2 Charles Siegfried 3 Joe Raspante 4 Jim Tom Custin 5 Ben Shereshaw 6 John Ault 7 Phil Sonheim 8 Elmer Wasman 9 Lester Helle 10 Jesse Bieberman 11 Bob Reder Controls R REM REM REM REM R REM R R R R Points 65 49 34 23 19 17 13 12 11 10 6 1941 Nationals event Chicago July 1-6 fifth RC last prior WW II Up time biggest best ever held field 26 RC entries yielded 12 scoring pilots three repeaters nine newoomers eight total 40 flights over three-day period first time extra days allowed tuning preparations poor weather other delays fortunate first two days plagued windy weather Siegfried Ault Reder repeaters names new comers will emerge go Bill attended meet did enter plane highly-inter ested spectators Bill honey moon finishing PhD research thesis Based sensible priorities neither us should have just couldnt miss time newcomer took first place Jim Walker Fireball Control Line fame Portland OR remembered preceding 1940 Nats Jim spent time carefully observing RC event helped Elmer Wasman launch plane Also several 1940 photos showed Jim critically watch ing RC planes judges Rumors Walkers preparations RC model leaked Bill through some letters Ed Rockwood rabid RC experimenter West Coast rumor mentioned new system called proportional control something dreamed about never seen would new exciting true Jim Walker Sure enough entry small 7-ft ship proportional rudder proportional engine speed used two standard RCH receivers relays very clever way engine control simpler two controls used two sets breaker points engines ignition system set high speed other low speed led primary spark coil wire through relay contacts two timer points Signal oft save low sneed save hish sneed RC $249/pkg 18 Scale $449/pkg 24 neat part pulsing channel gave intermediate speed Theres Changing pulsing dwell time pro duced speed between low high medium speed engine emitted distinc tive burping sound jumped between high low speed rudder channel used dwell-time pulsing used small electric motor driving through fluid coupler rudder pulled left side spring oft signal rudder left signal right Dwell-time pulsing gave 50/50 ratio neutral rudder varying pulse ratio gave desired position full left full right truly propor tional rudder following control stick first contest demonstration dual-proportional system using two independent radio channels model plane Furthermore Jim squeezed equipment small time 7-ft plane weighed 5 lb fully loaded did first taxi maneuvers ever seen proportional systemeven bumpy dirt road tricycle landing gear helped accomplishment Walker awarded 88 points out possible 100 air maneuvers spot landings taxiing clear Walkers last flight carried smoke bomb simulate skywriting skillful competitor RC competitors later Arthur Earle Close behind Walker next plane earned 83 points second place five-point gap differ ence between assisted takeoff 5 points taxi takeoff 10 points Earles 9-ft plane powered Ohlsson 60 used three controls REM original design andget thishis first model plane three controls actuated escapements three sepa rate receivers flying very con sistent spot landings stopped within 54 ft spotexcellent days Earl newcomer knowledge never flew again National Contest Charlie Siegfried using 1940 plane took third place higher score second place year before managed large loop may have first recognizable performed Nationals Ken Harker modem plane brought two electrical engineering stu dents Purdue University attracted great attention its complete complex control system Harker Dick Symonds designed built 14-tube receiver five audio channels rudder ele vator engine controls Selective audio circuits directed command signal desired electric motor control surface No sequence system delays electronic equivalent tuned-reed system used Leo Weiss 1937 ground checkout demonstrated control direction could quickly chosen control surface speed seemed quite slow us since travel time neutral full deflection about four seconds0 12-ft plane sported sleek racertype body 3A-hp Mercury Avia en gine disappointing us flown meet whole system beautifully crafted though Bill didnt bring plane satisfaction seeing two dupli cates 8-ft Guff meetthe first meet two look-alike planes present John Ault flew Guff seven times meet fifth place 50point score called plane Spook gave no explanation why2 now actively retired Arkansas Mike Thomas Pittsburgh RC Contest Director Frank Zaic Harry Copeland judges names other officials couldnt found reference material final standings P1 Name Plaae Equipment Points 1 Jim Walker 7-ft trike gear RM proportional 88 Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blend4 Chnices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balinons FILLER SB SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS r Over 1000 ToolS FREE Catalog I4FROM MicroMark Small Tool Specialists yao asa miniature issla pselt find t~atstaeeting asians ear new MiCNOMANK cafaingl Mann teals hard-ta-find . mann HUGE DISCOUNTS Na mere searctdag frnm stare fanfare New enerynhina pan need clone peer mailbas Save time sane macen Use coupon mend name addresa MICROMARK ass vi 12-201 94 Cant Main 5t Chases NJ sanee I I assneasI tnt _________________________________ snese ______ sip I L1 May1986 173 found talented showman midable opponent Only Way Iy Fabtronics Mark 3 CDI pointless system Works Great Most 2 4 Cycle engines Automatic Spark control now avaitabte moat 4 cycte engines comptene System Batteries non mci69 add $3 poss & HendI FABTRONICS 375 Isle Royal Rd Calesburg IL 61401 2541 NE 11th Court ano Beach Florida 33062 e 305 941-9119 AVAILABLE FROM LEADING DEALERS AND DISTRUBUTORS DIRECT 2 Arthur Earle 9-ft orig REM3esc 83 3 Charles Siegfried 15-ft orig REMselec tor 77 4 Marvin Hemp Miss America RE2esc 73 5 John Ault 8-ft Guff RM2esc 50 6 George Karpovich Custom Cavalier RM 2esc 39 7 HD Edwards 9-ft Cavalier RM2 elect mot 29 8 Bob Reder 8-ft Sailplane Rlesc 13 9 Ken Harker l2-ft orig REMtones 9 10 Clark Hile 8 pts 11 Cecil Winik 6 pts 12 Allen Trinuner 5 pts R er E ator M r account five-year history RC event AMA National Contest makes plain Radio Control arrived time 1941 event small new distinct category model plane family measure rapid buildup near end period number RC flights40 flights 1941 compared total 10 flights previous four years Receivers Technically airborne radio gear still highly experimental extremely fussy Tuning adjusting finicky sets occupied much contest time example receivers 45-volt B battery dropped little volt tuning relay settings redone single-tube receivers both Type 30 vacuum tube RK62 gas tube could coaxed job needed time superregenerative mode opera tion highly resistant spark ignition usually no problem Other types detector modes used three- four-tube sets did fare well extra audio tubes ad versely affected vibration especially powered models Relays Commercial units heavy expensive sensitive vibration mar ginally adequate small plate current changes available receivers Homemade relays fared better tail ored particular receivers use remember brother Bill wrote article 1940 QST magazine giving construction details homemade DG-6 polarized relay received hun dreds requests hams informa tion availability purchasing13 think fact stated built relays 500 350 magnet 150 fine wire grabbed atten tion labor winding half-mile fine wire small form forming metal parts included cost Later Sigma other commercial relays came available Control systems used during period varied may grouped several categories follows 1 Escapements ranging size oz 4 oz seen rapid positive over half models Some used escapement rudder alone others used up three channels giving rudder elevator mo tor REM Escapements would prove around years come would appear various clever arrangements 2 Sequential selector systems worked like dial telephone used Siegfried Wasman Sonheim others group pulses received selector would connect power specific control surface electric motor would move surface desired direction gave multiple controls single channel slow operated control surface timeprobably better slow boat fast airplane 3 Non-sequential selectors such Weiss 1937 tuned reeds would become very popular 195 Os time delay selecting control fraction second Harkers electronic tone selec tion system similar result Both planes ahead time such ambitious projects enormity complexity efforts involved caught unproven contest time 4 Walkers proportional pulsing also ahead its time demonstrated superbly its effective control capability DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 83401 314 221-8803 aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40 SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE 174 Model Aviation PRODUCTS FOR THE DISCERNING MODELER DYNATHRUST PROPS look great too! ALL FUTURE PRODUCTION ON ALL SIZES WILL HAVE LOGO AND TIPS PAINTED SIZES CURRENTLY AVAILABLE 13x6 15X6r 8 $700 18x6 8r 10 0 22x8 10 0 14x6 16X6 8 $800 20X6r 810 0 AddlSizesAvailobleSoonf .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74r3pak$495 4Q4r INTERCEPTOR Folding Wing Gilder U-Build-It Kit $395 4 Ready Fly $795 Add $3 postage handling first additional P0 Box68132 AIRCRAFT Co Portland OR 97268 Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship PrformanC 020 Inglnes FeeFlighl Rubber Pulse small Multi Channel R/C systems suItable 50 pears ago mas very capable aircraft mell$2195 proportioned stable model flight ao interestingKIT #102 design lending itself balsa strontaral techeiqoes Wev aol e wrale line 01 rear tavorites please send 505 tnt Flyline Cetalco prone 17031 273-0503 Sea ens ano Oistibators neited FLYLINE MODELS INC PO Box 2136 Fairfax VIrginia 22031 Transmitters easiest part RC systems since unusual limits weight size Power outputs five 40 watts normal almost used 5 6-60 MHz ham band Thanks ARRL pio neering hams having frequencies basic equipment available right time course would have better simpler radio licenses available need would solved after WW II AMA FCC developed no-exam RC license lessons learned pre WW II years five AMA National Contest RC competitionsand viable RC systems developed pioneers less-successful pioneers showed us directions followthereby help ing others avoid Undoubtedly RC development would have progressed much slowly stimulation provided contests Thanks AMA supporting organizations indi viduals made RC meets possible include Detroit Exchange Club Polks Steve Corbetts Chicago Parks Frank Nekimkens many others period next AMA Nats RC meet would take place until after end WVT II 1946in Wichita KS follow ing decades would see giant leap growth rate AMA membership num bers due primarily bursting popu larity RC competition event period still another storyor group stories Acknowledgements Thanks wife Joyce brother Bill son Terry supportand others helped research series References DeSoto Clinton B QST October 1938 Air Trails May 1939 2Grant CH ModelAirplane News September 1938 3Good Walter Air Trails January 1939 4Good William QST March 1940 Zaic Frank Walter Farynk National Model Airplane Meet Pictures 1939 6Bohnenblust CE QST August 1940 7Custin James R Model Airplane News Au gust September 1947 Custin J T Inverview September 18 1985 9Good Walter Win Air Trails November December 1940 January 1941 0DeSoto Clinton B QST September 1941 little device sounds steady beep guide right plane Easily mounts smallest planes Use connector plug receiver same servo Also tells someone frequency solid state crystal oscillator Comes ready mount full structions included WT 1 oz DIM 1 x2 3/8 x 3/4 MADE IN USA CLUB DISCOUNTS AVAILABLE * ASK * F3H IntI/JoIIy Continued page 86 Rudnick two complete 21km course managed come home minute faster Rud nick Official flying began Monday Decem ber 9 would like travel way around world contest have SEND CHECK OR MONEY ORDER TO ELECTRONIC DESIGNS INC BOX Z 1925 GREENWOOD LK TPK HEWITT NEW JERSEY 07421 PHONE 201 7281616 Plus $200 Shipping cont USA NJ Residents add 6% Sales Tax COD add $200 Allow 2 wks Shipping May1986 175 lightweight package Later other mechanDavis Al ModelAirplane News Septemlr isms single dual proportional sys 1941 tems would become popularKulick Harold Model Airplane News Oc 5 earlier slow-cycling systems used tober 1941 1937 planes Lanzo Good didnotGood William bc cit reappear after first year indicating other methods considered effec tive 1EEV ONLY
Edition: Model Aviation - 1986/05
Page Numbers: 76, 77, 78, 79, 80, 81, 82, 171, 172, 173, 174, 175
THE 1937 NATIONAL CONTEST re vealed preceding installment beginning steps RC model plane development blend two different hobbies gas-powered model planes amateur radio modeler needed produce stable controllable plane could easily carry radio gear radioman needed produce airborne radio gear tolerate environment vibration ignition noiseand hard land ings Only few individuals possessed both skills early efforts utilized least two persons stories next four Nats starting 1938 will highlight advancements happened just six entries 1937 number climbed 26 1941 year some old hands would reappear 1938 RC successes burst forth especially final prewar meet 1941 1938 Nationals second AMA Nats RC event Detroit July 9 1938 five entries Two veterans 1937 event Pat Sweeney Walt Good Chet Lanzo 1937 winner did enter time Elmer Wasman spectated due receiver problems Leo Weiss B Schiffman didnt show three new comers Clinton DeSoto Howard Flanigan Mike Roll DeS oto giant 25-lb Cub 14-ft span twin Forster engine two controls rudder elevator required four separate receivers using new RK62 three-part series concluded issue author has taken us first RC event atthe 1936 National Con test year AMA founded 50 years ago final prewar Nats 1941 Offering RC first time may have pure optimism no entrants RC established itself forever dynamic modeling class just five years later Part 3 alt Good Histryot RC Flying newcomers would arrive bolster ranks No person actually entered five prewar Nats RC events Although Wasman Good attended five officially flew four However enough repeaters present meet develop camaraderie among pioneers closeness still remains today 50 years later meet well review top fliers equipmentand observe de velopment trends toward success Fi nally well witness moments Raytheon gas tube one-tube superregen circuit Sigma relay Four transmitters four separate frequencies 56-60 MHz used operate receivers give left/right up/down flight control no signal control surfaces remained last positions No provision made automatic return neutral positions hind sight tells us non-neutral-return system may have difficult fly early stage RC Two reversible motors operated rud der independently simultaneously desired Everyone anxious see behemoth fly Total radio payload 4 lb Before Nats total flight weight 28 lb 10-in-dia wheels steel landing gear lightened bring weight just under RC event limit 25 lb maximum1 very disappointed giant Cub wasnt flown day Ive learned whether Cub ever flown 76 Model Aviation Left WaltGood RC Guff new bodyforthe 1938 Nats LesterGood Pop left ham operator Kreiiick right Right Aithough external damage plane mild lnternai damage receivers appeared awesome repaired used again Goods radio equipment 1938 Ciockwise right receiverwith Type 30 tube sensI tive relay escapement Au homemade picture taken Kalamazoo Airport few weeks afterthe 1938 Nats crash shows Walt amiiing No wonder Guff re built Rxsee side window fiying again 1938 Left DeSoto Cub second 1938 Nats sits Wayne County Airport hangar Wing 25-lb model can seen back ground Center Four RK-82 receivers controlled Cubs rudder elevator Right Cub fuselage outside hangar Its biggie Goods Big Guff new fuselage big radio compartment 12 x 15 x 6 allow easy access airborne gear relays actuators changed 1937 rig Homemade polarized relays lightweight balanced armatures resistant engine vibration would operate reliably current change iampere actuators changed homemade four-spoke escape ments mounted directly fin hori zontal stabilizer allowing very short direct mechanical connection control surfaces 1-az escapement posi tive positions very fasta few tenths second position old cycling actuator took over 3 sec lacked positive home positions Both rudder elevator op erable However rudder ac tually connected 1938 meet Howard Flanigans plane 8-ft span two large four-spoke escapements cabin rudder elevator control used two RK62 receivers 56 60 MHz Brown Jr power Pat Sweeney brought new plane Custom Cavalier well-established design Free Flight Gas arena believed used some 1937 gearwith rubberband-driven escapement rudder control Mike Roll ancient photo album see RC plane streamlined shoulder-wing type similar Cavalier used rudder control Strangely much detail written about equipment early RC models partly because re porters werent very knowledgeable about RC partly because RC event re ports brief order share space other events Nats Radio Control event Satur day July 9 windiest day Nats pioneers liked RC didnt like much wind Good ship chalked up about 30 flights since last Nats gained confidence new controls decided give try keep account 1939 flight accurate unbiased turn description Charlie Grant editor Model Airplane News2 Toward end Saturday afternoon after diligent work during entire day Walter Good radio-controlled mod el prepared flight demonstrated efficiency radio mechanism ground worked perfectly great praise due young man unique efficient mechanism em ployed Paul Kreilick radio operator shares honor mechanism complete efficient has exhibited Finally undertook fly ship though wind blowing about 20 miles per hour very gusty difficult because novelty type ship keep spectators rushing May1986 77 Left Howard Flanigan hat hIs 8-ft cabin plane two controls placed third 1938 Right Flanigans setup used two Sigma relays top two escapements bottom fastened wooden bulkhead fitted Inside cabin Left Bill Good holds Guff fuselage next new 20-watt transmitter storage bat tery 400-volt genemotor Thats portable believe new fin/rudder also added 1939 Center homemade escapement used Guff fin stab rudder elevator control also new 1939 RIght Cutaway view rud der escapement mounted Guff fin Escapement sketched oversize show details 1939 group endeavoring prepare models flight However finally model taken field motor started took off Unfortunately grass quite long some caught elevator flap deflected takeoff model immediately went stall recovered However seoond stall after zoom turned over its back made complete loop meantime Walter endeavor ing 100-yard dash back operating mechanism means hoped remedy disastrous condi tions flight Unfortunately though bottom loop model hit ground just before nosed up before Walter oould oontrol ship ship complete washout radio apparatus inside ship looked someone stirred around concrete mixer tail part mechanism damaged nose pushed spite damage hours work gone model Walter still smile commend him highly must admit smile partly fake because kicking myself being near transmitter end launch carefully instructed radio helper Paul Kreiick W8QQE hold control box oould grasp easily after galloped back launchand cautioned him move switch because never flown plane before touch rudder would have corrected stall placing Guff circling 1940 Left Biebermans transmitterwith V antenna sits top car atthe 1939 Nats Right Biebermans one-tube receiver seen through transparent panei fuseiage 78 Model Aviation Left Joe Raspanti ground-tests Super Buccaneer second 1939 Nats Note tripod-mounted controi box Center controi box used teiephone dial Rudder engine controls dialed Right four-tube receiver sensitive relay inside cabin Left Phil Sonheim fourth 1939 helper shown holding receiver package plane uncle present-dayAMA leader Dick Sonheim Right Elmer Wasman makes always-required adjustments entry just before placing third Wasmans fuselage carried RK-62 tube receiver escapement rudder didnt make successful 1939 Nats flight Irwin Leshners RC entry 1939 Nats 1940 flight dont really believe long grass deflected takeoff Grant suggested Since wing-tip-assisted launch finally released shoulder Left Phil Sonheim 9-ft 3-ch piano Right close-up homemade selector device Note use bulkheads compartments separate heavy equipment Left Wasman launches model wing tlpfrom plywood runway Model hitthe background weeds Jim Walker sits foreground Right Bob Rederand radioman pylon modelrudder-only controls May1986 79 Left Bill Good built two-channel transmitter overnight local electronics store won meet next day Center Bill Wait prepare RC Guff flight fitted rudder elevator engine control rudderwas used 1940 Nats Right Bill tuning receiver meter priorto flighta standard necessary procedure early days Photo byAl Daraghy IegTrIeaspIanewItn -orsieranaseIec tor telephone exchange behind windows Left Custin brothers Tom Jim fourth 1940 Nats 8-ft model Right Tom Custin holds 3-lb RC receiver controlsall removable unit Lull uruuruuw IUUU 1anwith Cecil Winik helping Right JohnAultandeniargedRCBuccaneerBth RC-1 wuih covers removed 5uuwu three motorizeu udpemOnts two ono-tube receivers 1941 Jim Walkers 1941 Nate winnerwith just 7-ft span pulse proportional control rud der engine speed featured trike landing gear powered Brown Jr Left Winnie Davis launches Siggys 1 4-lb RC plane Right Siegfrieds 50-watt transmitter can seen sitting cartrunk control console ground tall 1 4-footerln background Plane foreground backup Siegfried went finish third place height effect grass reduced Normally Guff would climb slowly launch stable Free Flight model first control command could delayed several minutes desired can sure learned lesson about launching wind important flight Later launching such wirrd handled quite easily same model long pilot controls start brother Bill controls instead Great Lakes ship radio operator would have flicked bit rudder before first stall Grant says further 20-mile wind crackup initial flight dis couraged other radio event contestants . evident experiences men least three four days should spent assembling testing before preparation flight days time proved insufficient prime cause lack successful flights radio models gusty weather clinched matter far flights concerned agreed statement would three years before time margin added meet schedule fact 1941 Nats would first set aside three days RC final standings 1938 Nats based ground demonstrations attemp ted flight follows 1 Walt Good Kalamazoo MI 2 Clinton DeSoto Granby CT 3 Howard Flanigan Detroit MI 4 Pat Sweeney Chicago IL 5 Michael Roll Dearborn MI though Guff given first place very satisfying win Thus end second Nats with much RC interest still no convincing demonstration actual maneuvers radio-controlled model plane3 1939 Nationals contrast 1938 Nats five RC entries 1939 Nats 16 11 actually showed up Wayne County Airport Detroit time RC event showed promise some real action Four 11 repeaters 1937 1938 Flanigan Gcod Lan zo Wasman newcomers Bieberman Leshner Mende Raspante Rose Siegfried Sonheim year judges would using point system first time ground points given workmanship control operation before actual flight flight points given several different maneuvers such cross-country return circles left right Figure8 others perfect score would net 100 points Left Earles 9-ft original REM three receivers Right Earle holdethe plane friend works control box table Transmitter located cars trunk pilots meeting judges decided would call out maneuver advance fast-talking pilot wouldnt get away describing what plane just donerather what sup posed contestant suggested model four vacuum tubes receiver should receive points receiver just tube course one-tube fliers objected judges ruled performance principal factor number parts Thank goodness models basic rudder control few also elevator control used new single RK62 gas-tube receiver Sigma relay escapement actuators trend rudder-only beginning emerge Goods weather perfect cumulus clouds very light breeze better brother Bill present first RC Nats having missed two before Gulf new fin rudder replace ments account 1938 Nats flight damage new lighter 05-oz escape ments two receivers rebuilt ver sions same Type 30 tube batteries anchored floor body instead being part receiver/relay package 1938 crash batteries integral receiver package proved decisively pound loose batteries could very destructive Lesson learned mount 80 Model Aviation Hemps Miss America RC fuselage Power Barker engine model placed fourth batteries separately 60 flights Guff several public demonstrations through out southern Michigan during 1938 high hopes might year true RC demonstration Bill pilot always took turns launched Guff running wing tip First judges called left circle followed right circle plane did both came cross-country return request plane climbed light breeze almost two minutes before judges said half-mile paint reached Bill steered 34-circle left followed -circle right headed back toward transmitter Guff soon arrived overhead com plete returnat point well over 1000 feet altitude Guff being turned back wind Figure-8 requested large left circle followed equal-sized right circle form 8 went smoothly Next Bill chose spiral dive stall optional stunt maneuver also went well home practicing spiral dive loop using just rudder control bit unreliable agreed use should mentioned though Guff both rudder elevator controls decided use rud derwith experi ence elevator receiver switched off elevator escapement pinned neutral required air maneuvers completed plane cruising 1500 feet thermal engine stopped 6 min normal 1941 next few minutes Bill repeated several maneuvers try better point score dont remember whether ploy helped control during glide worked well still altitude burn moment district radio inspec tor earlier checked ham licenses witnessing flight asked might have try stick keeping eyes plane Bill calmly asked him ham license reply No Sorry said Bill Fliers other events field collected around transmitter land ing area after word spread radio job air judges trying tell Bill make turns approach butt tell judge last task spot landing Bills job make turns saw fit get close possible Bill using steering technique keeping final turn before landing banked long possible giving quick opposite rudder level wings followedby neutral plane would float smooth landing did less 100 feet judges points awarded 89 out possible 1O0 What nice day flight Zak s 1939 Nats Book said under control9 Sure wasp moment took off until glided back its master worth coming Nationals just see historic per forniance5 Joe Raspante 11-ft Super Buc caneer set up flight Sal Taibi person ever saw could hand-launch giant plane over headnot wing tip Joes plane four-tube receiver rudder control beautifully crafted powered Forster 99 control box used telephone dial five com mands up/down right/left stop engine Since photos plane show no elevator flap believe rudder engine active controls used year flight lasted almost four minutes gathered total 11 points second RC flight made 1939 Nationals account states radio interference stopped engine prematurely Elmer Wasman short flight meet third place told later best RC demonstration took place dedication new airport southern Georgia shortly after Nats According notes total six pilots attempted flights day list below shows placed P1 Name Hometown Age Points 1 Walt Bill Good Kalamazoo MI 23 89 2 Joe Raspante Brooklyn NY 29 11 3 Elmer Wasman Jacksonville FL 30 9 4 Phillip Sonheim Niellsville WI 27 8 5 Charles Siegfried Wichita KS 42 8 6 Robert Mende Flint MI 22 8 7 Erwin Leshner Philadelphia PA 20 6 8 Jesse Bieberman Philadelphia PA 34 6 9 Howard Flanigan Detroit MI 54 1 10 Chester Lanzo Cleveland OH 25 1 11 Robert Rose Highland Park MI 190 1940 NatIonals entries actual flights surprises encountered event held Chicago time 11 planes appeared 16 entries least seven made scored flights Six entries May1986 81 Ault helmet RC Guff-type plane escapement control fifth George Karpovich adjusts Custom Cava lier featuring two-escapement control Clin ton DeSoto helps transmitter controls Left Ken Harker behind Purdue UniversItys 1 21/2ft entry Model demonstrated ground flown Center Harker transmitter used tone control three-channel operation Right 1 0-tube receiver electronic tone selectIon used Harker plane repeaters five newcomers Charlie SiegfrIed Siggy Wichita largest plane 15-ft span 1 3-lb weight Forster 99 power dubbed telephone exchange because its control system rudder elevator engine basically dial telephone simi lar Raspantes system dialing given set pulses airborne selector switch would energize desired electric motor give say left rudder signal turned off rudder would return neutral similar action operated ele vator different number pulses Engine control however remained throttle position set having no automatic neutral return feature airborne collection electronics motors gears selector batteries weighed 3 lb described CE Bohnenblust Charlies radioman QST magazine carried cover photo Charlies plane6 control box size small suitcase complete neck strap made him lcok like street vendor central stick controlled rudder elevator through mechanical pulse generator details revealed long cable box led trunk Siggys car 50-watt transmitter housed typical flight Siggy would start Forster 99 hoist giant plane onto Winnie Davis shoulder quickly don control box check systemalways talking steady stream Winnie would run full speed heave plane air show repeated times meets Siggy became special characters RC circuit can still remember flights plane went dutifully through required maneuvers drifting down wind whole time finally disappearing behind trees outside airfield Spot landings thing controls did work time Siggy eamed second place closest top ever reached proud Joe Raspaate followed Siggy third place very respectable flight Super Buccaneer Jim Tom Custia Wisconsin tcok fourth place original 8-ft cabin plane weighed about 10 lb Power twin-cylinder engine built friend Ed Schunke Earlier tried Forster 99 didnt have enough power suit Tom built radio system control rudder engine7 two control channels gave variable positions based clever sequenced-selector-pulse systemalmost proportional control receiver used RK62 tube home made polarized relay servos Pittman permanent magnet motors using Continued page 171 82 Model Aviation TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals A/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED RC History/Good Continued page 82 lead-screw speed reduction transmit ter control box called wheatfield because dozen clattering relays generate pulses Hmmmdigital con trol Jim being older assumed posi tion pilot made several RC flights just before Chicago Nats Im allowed mention ended treesomething about missed pulse Toms system However day Nats Jim report summer job Lake Michigan ship Tom became pilot official flight Tom says plane got air OK made two maneuvers before ship turned wrong way went ground8 good enough fourth place Tom recently retired General Elec tric Syracuse Jim thinking about retiring job patent lawyer Milwaukee Ben Shereshaw Several planes threefunction controls rudder elevator motor REM unusual Shereshaws twin-boom pusher called RC-1 Cecil Winick Radio Control Headquarters RCH attended ad justments RCH receivers motorized escapements What pretty plane Fifth place John Ault enlarged Buccaneer awarded sixth place using escape ment rudder control Phil Sonheim another REM ship 9-ft mid-winger housed completely homemade selector electric motor system very neat compact took ninth place leamed later uncle Dick Son heim well-known present-day AMA lead er RC system never published probably because Phil turned skills secret war work shortly after Nats Im told died during war under rather mysterious circumstances pursuing work States Goods second time brother Bill able team Nats felt Guff better shape beforeand pilots hundred flights stick practice Some public demonstrations several meets Illinois Michigan Ohio Canada What surprise Bill found waiting us after first night Sherman Hotel After breakfast Wednesday morning went car hotel lot found hole Guff wing stored just beneath car ceiling dad said binoculars gone Bill said Wheres transmitter gone too After few hours discussion hotel management local police became clear recovery stolen items extremely unlikely What next question RC event scheduled next morning Thursday Bill said Walt fix wing Ill build transmitter Thats what happened Bill went Newark Radio Store State Street explained problem manager said lots parts would night inventoryand workbench back room oouldnt believe Bill never worked fast home morning came forth two radio tubes 4-ftsq piece plywood along bunch coils parts reminded overnight transmitter should touched because 400 volts exposed everywhere almost forgot temporary control box Ken Davis rigged up 400 volts too survived somehow way RC site 79th Keeler stopped open field make quick distance test OK after some tuning site word spread about stolen transmitter several fliers offered use Joe Raspante guy beaten out first Save old Timer Podp5jtiqUO si6~ GbaflW0From this.k sped rtmers potfltS Ian9 Mode Engine Parts Only Over 600 items Send *200 current catalog pAN AR 05pA C 200/o Greater Heat Resistance Impervious Exhaust Products Eliminate Burned Up & Blown Out Silicone SEND 4 SOperS/8 D Coupler or500per3/4 ID DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54580 May1986 171 III PROP ASSEMBLY #1 09-ELECTRIC ONLY PROP HUB ASSEMBLY #IOOA 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #100A Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair POOP HUB ASSEMBLY # 110 051 engines electric motor equivalent WeightS grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP 1101 ASSEMBLY N 111 0 engines electric motor equivalent 20 grams$2000 PROP BLADES FOR HUB N 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line FAI RUBBER Sizes 114 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber mdse add $1 50 UPS Over $lSaddlO% Phone O213 830-8939 H377-1959 P30 HEADQUARTERS Special kit/rubber combos NEW NEW P30 prop $2495 Coupe deVIIIe Finished prop Very very complete Tilka____ Wakefield22Fe shed F Oct End_______ KSB TIMERS Fuel Shutoff 3Osec-$1195 BminDT-$1195 $3895 plus $250 UPS Send $100 1986 Catalog F Model Supply L7 P0 Box 3557 Torrance CA 90610 NEW FROM FOX 15X 15 RC featuring all-new Mark X carburetor 42 9O muffler #21500 Bore590 Stroke . 540 Weight 45 oz RPM 7-5 prop14000 muifler installed RPM 8-4 prop 13000 muffler installed lightest weight lowest cost 15 can buy now boasts all-new Marki carburetor better-than-ever per formance Runs best lO/o nitro fuel little jewel still compact enough light enough fit models designed 09s 10s VISA Mastercard Accepted F0x MFG Co 5305 TOWSON AVE 0RT SMITH AR 72901 5011 646-1656 Easiest Hinge Install Now available scale size PRO HINGEJ use cyanoacrylate adhesives No pinning messy epoxyInstant glues neededSpecial Paper No special hinge slotter needed No alignment necessary stic Special Paper RADIO SOUTH Inc 43 West Nine Mile Rd Pensacola FL 32414 904 478-6745 place year before real sports manship Ive always very warm feeling Joe ever since cant say same Sherman Hotel meet decided fly rudder though overnight trans mitter two channels before did use elevator newly-installed throttle control Actually Guff carried two separate receivers option rudder/elevator rudder/engine might have earned some extra points Fortunately opportunity make several flights meet almost pulled off secret maneuver inside loop practicing home field using rudder con trol began using full left rudder start left circle spiraled tighter steeper turn during model picked up considerable speed nose pointing down steeply gave opposite rudder just long enough stop turn held neutral nose rotated rapidly vertical position plane stalled fell over its back recovered level flightmaldng pear-shaped loop9 meet engine quit top stall model flopped down going neatly over its back Luckily altitude sufficient glide back within 20 ft spot maxi mum landing points Note final points listed below lower year before time judges required give fewer points poorly-executed maneuvers Further Leo Weiss judges taldng postmans holiday RC target drone job Wright Field P1 Name 1 Walt Bill Good 2 Charles Siegfried 3 Joe Raspante 4 Jim Tom Custin 5 Ben Shereshaw 6 John Ault 7 Phil Sonheim 8 Elmer Wasman 9 Lester Helle 10 Jesse Bieberman 11 Bob Reder Controls R REM REM REM REM R REM R R R R Points 65 49 34 23 19 17 13 12 11 10 6 1941 Nationals event Chicago July 1-6 fifth RC last prior WW II Up time biggest best ever held field 26 RC entries yielded 12 scoring pilots three repeaters nine newoomers eight total 40 flights over three-day period first time extra days allowed tuning preparations poor weather other delays fortunate first two days plagued windy weather Siegfried Ault Reder repeaters names new comers will emerge go Bill attended meet did enter plane highly-inter ested spectators Bill honey moon finishing PhD research thesis Based sensible priorities neither us should have just couldnt miss time newcomer took first place Jim Walker Fireball Control Line fame Portland OR remembered preceding 1940 Nats Jim spent time carefully observing RC event helped Elmer Wasman launch plane Also several 1940 photos showed Jim critically watch ing RC planes judges Rumors Walkers preparations RC model leaked Bill through some letters Ed Rockwood rabid RC experimenter West Coast rumor mentioned new system called proportional control something dreamed about never seen would new exciting true Jim Walker Sure enough entry small 7-ft ship proportional rudder proportional engine speed used two standard RCH receivers relays very clever way engine control simpler two controls used two sets breaker points engines ignition system set high speed other low speed led primary spark coil wire through relay contacts two timer points Signal oft save low sneed save hish sneed RC $249/pkg 18 Scale $449/pkg 24 neat part pulsing channel gave intermediate speed Theres Changing pulsing dwell time pro duced speed between low high medium speed engine emitted distinc tive burping sound jumped between high low speed rudder channel used dwell-time pulsing used small electric motor driving through fluid coupler rudder pulled left side spring oft signal rudder left signal right Dwell-time pulsing gave 50/50 ratio neutral rudder varying pulse ratio gave desired position full left full right truly propor tional rudder following control stick first contest demonstration dual-proportional system using two independent radio channels model plane Furthermore Jim squeezed equipment small time 7-ft plane weighed 5 lb fully loaded did first taxi maneuvers ever seen proportional systemeven bumpy dirt road tricycle landing gear helped accomplishment Walker awarded 88 points out possible 100 air maneuvers spot landings taxiing clear Walkers last flight carried smoke bomb simulate skywriting skillful competitor RC competitors later Arthur Earle Close behind Walker next plane earned 83 points second place five-point gap differ ence between assisted takeoff 5 points taxi takeoff 10 points Earles 9-ft plane powered Ohlsson 60 used three controls REM original design andget thishis first model plane three controls actuated escapements three sepa rate receivers flying very con sistent spot landings stopped within 54 ft spotexcellent days Earl newcomer knowledge never flew again National Contest Charlie Siegfried using 1940 plane took third place higher score second place year before managed large loop may have first recognizable performed Nationals Ken Harker modem plane brought two electrical engineering stu dents Purdue University attracted great attention its complete complex control system Harker Dick Symonds designed built 14-tube receiver five audio channels rudder ele vator engine controls Selective audio circuits directed command signal desired electric motor control surface No sequence system delays electronic equivalent tuned-reed system used Leo Weiss 1937 ground checkout demonstrated control direction could quickly chosen control surface speed seemed quite slow us since travel time neutral full deflection about four seconds0 12-ft plane sported sleek racertype body 3A-hp Mercury Avia en gine disappointing us flown meet whole system beautifully crafted though Bill didnt bring plane satisfaction seeing two dupli cates 8-ft Guff meetthe first meet two look-alike planes present John Ault flew Guff seven times meet fifth place 50point score called plane Spook gave no explanation why2 now actively retired Arkansas Mike Thomas Pittsburgh RC Contest Director Frank Zaic Harry Copeland judges names other officials couldnt found reference material final standings P1 Name Plaae Equipment Points 1 Jim Walker 7-ft trike gear RM proportional 88 Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blend4 Chnices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balinons FILLER SB SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS r Over 1000 ToolS FREE Catalog I4FROM MicroMark Small Tool Specialists yao asa miniature issla pselt find t~atstaeeting asians ear new MiCNOMANK cafaingl Mann teals hard-ta-find . mann HUGE DISCOUNTS Na mere searctdag frnm stare fanfare New enerynhina pan need clone peer mailbas Save time sane macen Use coupon mend name addresa MICROMARK ass vi 12-201 94 Cant Main 5t Chases NJ sanee I I assneasI tnt _________________________________ snese ______ sip I L1 May1986 173 found talented showman midable opponent Only Way Iy Fabtronics Mark 3 CDI pointless system Works Great Most 2 4 Cycle engines Automatic Spark control now avaitabte moat 4 cycte engines comptene System Batteries non mci69 add $3 poss & HendI FABTRONICS 375 Isle Royal Rd Calesburg IL 61401 2541 NE 11th Court ano Beach Florida 33062 e 305 941-9119 AVAILABLE FROM LEADING DEALERS AND DISTRUBUTORS DIRECT 2 Arthur Earle 9-ft orig REM3esc 83 3 Charles Siegfried 15-ft orig REMselec tor 77 4 Marvin Hemp Miss America RE2esc 73 5 John Ault 8-ft Guff RM2esc 50 6 George Karpovich Custom Cavalier RM 2esc 39 7 HD Edwards 9-ft Cavalier RM2 elect mot 29 8 Bob Reder 8-ft Sailplane Rlesc 13 9 Ken Harker l2-ft orig REMtones 9 10 Clark Hile 8 pts 11 Cecil Winik 6 pts 12 Allen Trinuner 5 pts R er E ator M r account five-year history RC event AMA National Contest makes plain Radio Control arrived time 1941 event small new distinct category model plane family measure rapid buildup near end period number RC flights40 flights 1941 compared total 10 flights previous four years Receivers Technically airborne radio gear still highly experimental extremely fussy Tuning adjusting finicky sets occupied much contest time example receivers 45-volt B battery dropped little volt tuning relay settings redone single-tube receivers both Type 30 vacuum tube RK62 gas tube could coaxed job needed time superregenerative mode opera tion highly resistant spark ignition usually no problem Other types detector modes used three- four-tube sets did fare well extra audio tubes ad versely affected vibration especially powered models Relays Commercial units heavy expensive sensitive vibration mar ginally adequate small plate current changes available receivers Homemade relays fared better tail ored particular receivers use remember brother Bill wrote article 1940 QST magazine giving construction details homemade DG-6 polarized relay received hun dreds requests hams informa tion availability purchasing13 think fact stated built relays 500 350 magnet 150 fine wire grabbed atten tion labor winding half-mile fine wire small form forming metal parts included cost Later Sigma other commercial relays came available Control systems used during period varied may grouped several categories follows 1 Escapements ranging size oz 4 oz seen rapid positive over half models Some used escapement rudder alone others used up three channels giving rudder elevator mo tor REM Escapements would prove around years come would appear various clever arrangements 2 Sequential selector systems worked like dial telephone used Siegfried Wasman Sonheim others group pulses received selector would connect power specific control surface electric motor would move surface desired direction gave multiple controls single channel slow operated control surface timeprobably better slow boat fast airplane 3 Non-sequential selectors such Weiss 1937 tuned reeds would become very popular 195 Os time delay selecting control fraction second Harkers electronic tone selec tion system similar result Both planes ahead time such ambitious projects enormity complexity efforts involved caught unproven contest time 4 Walkers proportional pulsing also ahead its time demonstrated superbly its effective control capability DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 83401 314 221-8803 aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40 SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE 174 Model Aviation PRODUCTS FOR THE DISCERNING MODELER DYNATHRUST PROPS look great too! ALL FUTURE PRODUCTION ON ALL SIZES WILL HAVE LOGO AND TIPS PAINTED SIZES CURRENTLY AVAILABLE 13x6 15X6r 8 $700 18x6 8r 10 0 22x8 10 0 14x6 16X6 8 $800 20X6r 810 0 AddlSizesAvailobleSoonf .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74r3pak$495 4Q4r INTERCEPTOR Folding Wing Gilder U-Build-It Kit $395 4 Ready Fly $795 Add $3 postage handling first additional P0 Box68132 AIRCRAFT Co Portland OR 97268 Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship PrformanC 020 Inglnes FeeFlighl Rubber Pulse small Multi Channel R/C systems suItable 50 pears ago mas very capable aircraft mell$2195 proportioned stable model flight ao interestingKIT #102 design lending itself balsa strontaral techeiqoes Wev aol e wrale line 01 rear tavorites please send 505 tnt Flyline Cetalco prone 17031 273-0503 Sea ens ano Oistibators neited FLYLINE MODELS INC PO Box 2136 Fairfax VIrginia 22031 Transmitters easiest part RC systems since unusual limits weight size Power outputs five 40 watts normal almost used 5 6-60 MHz ham band Thanks ARRL pio neering hams having frequencies basic equipment available right time course would have better simpler radio licenses available need would solved after WW II AMA FCC developed no-exam RC license lessons learned pre WW II years five AMA National Contest RC competitionsand viable RC systems developed pioneers less-successful pioneers showed us directions followthereby help ing others avoid Undoubtedly RC development would have progressed much slowly stimulation provided contests Thanks AMA supporting organizations indi viduals made RC meets possible include Detroit Exchange Club Polks Steve Corbetts Chicago Parks Frank Nekimkens many others period next AMA Nats RC meet would take place until after end WVT II 1946in Wichita KS follow ing decades would see giant leap growth rate AMA membership num bers due primarily bursting popu larity RC competition event period still another storyor group stories Acknowledgements Thanks wife Joyce brother Bill son Terry supportand others helped research series References DeSoto Clinton B QST October 1938 Air Trails May 1939 2Grant CH ModelAirplane News September 1938 3Good Walter Air Trails January 1939 4Good William QST March 1940 Zaic Frank Walter Farynk National Model Airplane Meet Pictures 1939 6Bohnenblust CE QST August 1940 7Custin James R Model Airplane News Au gust September 1947 Custin J T Inverview September 18 1985 9Good Walter Win Air Trails November December 1940 January 1941 0DeSoto Clinton B QST September 1941 little device sounds steady beep guide right plane Easily mounts smallest planes Use connector plug receiver same servo Also tells someone frequency solid state crystal oscillator Comes ready mount full structions included WT 1 oz DIM 1 x2 3/8 x 3/4 MADE IN USA CLUB DISCOUNTS AVAILABLE * ASK * F3H IntI/JoIIy Continued page 86 Rudnick two complete 21km course managed come home minute faster Rud nick Official flying began Monday Decem ber 9 would like travel way around world contest have SEND CHECK OR MONEY ORDER TO ELECTRONIC DESIGNS INC BOX Z 1925 GREENWOOD LK TPK HEWITT NEW JERSEY 07421 PHONE 201 7281616 Plus $200 Shipping cont USA NJ Residents add 6% Sales Tax COD add $200 Allow 2 wks Shipping May1986 175 lightweight package Later other mechanDavis Al ModelAirplane News Septemlr isms single dual proportional sys 1941 tems would become popularKulick Harold Model Airplane News Oc 5 earlier slow-cycling systems used tober 1941 1937 planes Lanzo Good didnotGood William bc cit reappear after first year indicating other methods considered effec tive 1EEV ONLY
Edition: Model Aviation - 1986/05
Page Numbers: 76, 77, 78, 79, 80, 81, 82, 171, 172, 173, 174, 175
THE 1937 NATIONAL CONTEST re vealed preceding installment beginning steps RC model plane development blend two different hobbies gas-powered model planes amateur radio modeler needed produce stable controllable plane could easily carry radio gear radioman needed produce airborne radio gear tolerate environment vibration ignition noiseand hard land ings Only few individuals possessed both skills early efforts utilized least two persons stories next four Nats starting 1938 will highlight advancements happened just six entries 1937 number climbed 26 1941 year some old hands would reappear 1938 RC successes burst forth especially final prewar meet 1941 1938 Nationals second AMA Nats RC event Detroit July 9 1938 five entries Two veterans 1937 event Pat Sweeney Walt Good Chet Lanzo 1937 winner did enter time Elmer Wasman spectated due receiver problems Leo Weiss B Schiffman didnt show three new comers Clinton DeSoto Howard Flanigan Mike Roll DeS oto giant 25-lb Cub 14-ft span twin Forster engine two controls rudder elevator required four separate receivers using new RK62 three-part series concluded issue author has taken us first RC event atthe 1936 National Con test year AMA founded 50 years ago final prewar Nats 1941 Offering RC first time may have pure optimism no entrants RC established itself forever dynamic modeling class just five years later Part 3 alt Good Histryot RC Flying newcomers would arrive bolster ranks No person actually entered five prewar Nats RC events Although Wasman Good attended five officially flew four However enough repeaters present meet develop camaraderie among pioneers closeness still remains today 50 years later meet well review top fliers equipmentand observe de velopment trends toward success Fi nally well witness moments Raytheon gas tube one-tube superregen circuit Sigma relay Four transmitters four separate frequencies 56-60 MHz used operate receivers give left/right up/down flight control no signal control surfaces remained last positions No provision made automatic return neutral positions hind sight tells us non-neutral-return system may have difficult fly early stage RC Two reversible motors operated rud der independently simultaneously desired Everyone anxious see behemoth fly Total radio payload 4 lb Before Nats total flight weight 28 lb 10-in-dia wheels steel landing gear lightened bring weight just under RC event limit 25 lb maximum1 very disappointed giant Cub wasnt flown day Ive learned whether Cub ever flown 76 Model Aviation Left WaltGood RC Guff new bodyforthe 1938 Nats LesterGood Pop left ham operator Kreiiick right Right Aithough external damage plane mild lnternai damage receivers appeared awesome repaired used again Goods radio equipment 1938 Ciockwise right receiverwith Type 30 tube sensI tive relay escapement Au homemade picture taken Kalamazoo Airport few weeks afterthe 1938 Nats crash shows Walt amiiing No wonder Guff re built Rxsee side window fiying again 1938 Left DeSoto Cub second 1938 Nats sits Wayne County Airport hangar Wing 25-lb model can seen back ground Center Four RK-82 receivers controlled Cubs rudder elevator Right Cub fuselage outside hangar Its biggie Goods Big Guff new fuselage big radio compartment 12 x 15 x 6 allow easy access airborne gear relays actuators changed 1937 rig Homemade polarized relays lightweight balanced armatures resistant engine vibration would operate reliably current change iampere actuators changed homemade four-spoke escape ments mounted directly fin hori zontal stabilizer allowing very short direct mechanical connection control surfaces 1-az escapement posi tive positions very fasta few tenths second position old cycling actuator took over 3 sec lacked positive home positions Both rudder elevator op erable However rudder ac tually connected 1938 meet Howard Flanigans plane 8-ft span two large four-spoke escapements cabin rudder elevator control used two RK62 receivers 56 60 MHz Brown Jr power Pat Sweeney brought new plane Custom Cavalier well-established design Free Flight Gas arena believed used some 1937 gearwith rubberband-driven escapement rudder control Mike Roll ancient photo album see RC plane streamlined shoulder-wing type similar Cavalier used rudder control Strangely much detail written about equipment early RC models partly because re porters werent very knowledgeable about RC partly because RC event re ports brief order share space other events Nats Radio Control event Satur day July 9 windiest day Nats pioneers liked RC didnt like much wind Good ship chalked up about 30 flights since last Nats gained confidence new controls decided give try keep account 1939 flight accurate unbiased turn description Charlie Grant editor Model Airplane News2 Toward end Saturday afternoon after diligent work during entire day Walter Good radio-controlled mod el prepared flight demonstrated efficiency radio mechanism ground worked perfectly great praise due young man unique efficient mechanism em ployed Paul Kreilick radio operator shares honor mechanism complete efficient has exhibited Finally undertook fly ship though wind blowing about 20 miles per hour very gusty difficult because novelty type ship keep spectators rushing May1986 77 Left Howard Flanigan hat hIs 8-ft cabin plane two controls placed third 1938 Right Flanigans setup used two Sigma relays top two escapements bottom fastened wooden bulkhead fitted Inside cabin Left Bill Good holds Guff fuselage next new 20-watt transmitter storage bat tery 400-volt genemotor Thats portable believe new fin/rudder also added 1939 Center homemade escapement used Guff fin stab rudder elevator control also new 1939 RIght Cutaway view rud der escapement mounted Guff fin Escapement sketched oversize show details 1939 group endeavoring prepare models flight However finally model taken field motor started took off Unfortunately grass quite long some caught elevator flap deflected takeoff model immediately went stall recovered However seoond stall after zoom turned over its back made complete loop meantime Walter endeavor ing 100-yard dash back operating mechanism means hoped remedy disastrous condi tions flight Unfortunately though bottom loop model hit ground just before nosed up before Walter oould oontrol ship ship complete washout radio apparatus inside ship looked someone stirred around concrete mixer tail part mechanism damaged nose pushed spite damage hours work gone model Walter still smile commend him highly must admit smile partly fake because kicking myself being near transmitter end launch carefully instructed radio helper Paul Kreiick W8QQE hold control box oould grasp easily after galloped back launchand cautioned him move switch because never flown plane before touch rudder would have corrected stall placing Guff circling 1940 Left Biebermans transmitterwith V antenna sits top car atthe 1939 Nats Right Biebermans one-tube receiver seen through transparent panei fuseiage 78 Model Aviation Left Joe Raspanti ground-tests Super Buccaneer second 1939 Nats Note tripod-mounted controi box Center controi box used teiephone dial Rudder engine controls dialed Right four-tube receiver sensitive relay inside cabin Left Phil Sonheim fourth 1939 helper shown holding receiver package plane uncle present-dayAMA leader Dick Sonheim Right Elmer Wasman makes always-required adjustments entry just before placing third Wasmans fuselage carried RK-62 tube receiver escapement rudder didnt make successful 1939 Nats flight Irwin Leshners RC entry 1939 Nats 1940 flight dont really believe long grass deflected takeoff Grant suggested Since wing-tip-assisted launch finally released shoulder Left Phil Sonheim 9-ft 3-ch piano Right close-up homemade selector device Note use bulkheads compartments separate heavy equipment Left Wasman launches model wing tlpfrom plywood runway Model hitthe background weeds Jim Walker sits foreground Right Bob Rederand radioman pylon modelrudder-only controls May1986 79 Left Bill Good built two-channel transmitter overnight local electronics store won meet next day Center Bill Wait prepare RC Guff flight fitted rudder elevator engine control rudderwas used 1940 Nats Right Bill tuning receiver meter priorto flighta standard necessary procedure early days Photo byAl Daraghy IegTrIeaspIanewItn -orsieranaseIec tor telephone exchange behind windows Left Custin brothers Tom Jim fourth 1940 Nats 8-ft model Right Tom Custin holds 3-lb RC receiver controlsall removable unit Lull uruuruuw IUUU 1anwith Cecil Winik helping Right JohnAultandeniargedRCBuccaneerBth RC-1 wuih covers removed 5uuwu three motorizeu udpemOnts two ono-tube receivers 1941 Jim Walkers 1941 Nate winnerwith just 7-ft span pulse proportional control rud der engine speed featured trike landing gear powered Brown Jr Left Winnie Davis launches Siggys 1 4-lb RC plane Right Siegfrieds 50-watt transmitter can seen sitting cartrunk control console ground tall 1 4-footerln background Plane foreground backup Siegfried went finish third place height effect grass reduced Normally Guff would climb slowly launch stable Free Flight model first control command could delayed several minutes desired can sure learned lesson about launching wind important flight Later launching such wirrd handled quite easily same model long pilot controls start brother Bill controls instead Great Lakes ship radio operator would have flicked bit rudder before first stall Grant says further 20-mile wind crackup initial flight dis couraged other radio event contestants . evident experiences men least three four days should spent assembling testing before preparation flight days time proved insufficient prime cause lack successful flights radio models gusty weather clinched matter far flights concerned agreed statement would three years before time margin added meet schedule fact 1941 Nats would first set aside three days RC final standings 1938 Nats based ground demonstrations attemp ted flight follows 1 Walt Good Kalamazoo MI 2 Clinton DeSoto Granby CT 3 Howard Flanigan Detroit MI 4 Pat Sweeney Chicago IL 5 Michael Roll Dearborn MI though Guff given first place very satisfying win Thus end second Nats with much RC interest still no convincing demonstration actual maneuvers radio-controlled model plane3 1939 Nationals contrast 1938 Nats five RC entries 1939 Nats 16 11 actually showed up Wayne County Airport Detroit time RC event showed promise some real action Four 11 repeaters 1937 1938 Flanigan Gcod Lan zo Wasman newcomers Bieberman Leshner Mende Raspante Rose Siegfried Sonheim year judges would using point system first time ground points given workmanship control operation before actual flight flight points given several different maneuvers such cross-country return circles left right Figure8 others perfect score would net 100 points Left Earles 9-ft original REM three receivers Right Earle holdethe plane friend works control box table Transmitter located cars trunk pilots meeting judges decided would call out maneuver advance fast-talking pilot wouldnt get away describing what plane just donerather what sup posed contestant suggested model four vacuum tubes receiver should receive points receiver just tube course one-tube fliers objected judges ruled performance principal factor number parts Thank goodness models basic rudder control few also elevator control used new single RK62 gas-tube receiver Sigma relay escapement actuators trend rudder-only beginning emerge Goods weather perfect cumulus clouds very light breeze better brother Bill present first RC Nats having missed two before Gulf new fin rudder replace ments account 1938 Nats flight damage new lighter 05-oz escape ments two receivers rebuilt ver sions same Type 30 tube batteries anchored floor body instead being part receiver/relay package 1938 crash batteries integral receiver package proved decisively pound loose batteries could very destructive Lesson learned mount 80 Model Aviation Hemps Miss America RC fuselage Power Barker engine model placed fourth batteries separately 60 flights Guff several public demonstrations through out southern Michigan during 1938 high hopes might year true RC demonstration Bill pilot always took turns launched Guff running wing tip First judges called left circle followed right circle plane did both came cross-country return request plane climbed light breeze almost two minutes before judges said half-mile paint reached Bill steered 34-circle left followed -circle right headed back toward transmitter Guff soon arrived overhead com plete returnat point well over 1000 feet altitude Guff being turned back wind Figure-8 requested large left circle followed equal-sized right circle form 8 went smoothly Next Bill chose spiral dive stall optional stunt maneuver also went well home practicing spiral dive loop using just rudder control bit unreliable agreed use should mentioned though Guff both rudder elevator controls decided use rud derwith experi ence elevator receiver switched off elevator escapement pinned neutral required air maneuvers completed plane cruising 1500 feet thermal engine stopped 6 min normal 1941 next few minutes Bill repeated several maneuvers try better point score dont remember whether ploy helped control during glide worked well still altitude burn moment district radio inspec tor earlier checked ham licenses witnessing flight asked might have try stick keeping eyes plane Bill calmly asked him ham license reply No Sorry said Bill Fliers other events field collected around transmitter land ing area after word spread radio job air judges trying tell Bill make turns approach butt tell judge last task spot landing Bills job make turns saw fit get close possible Bill using steering technique keeping final turn before landing banked long possible giving quick opposite rudder level wings followedby neutral plane would float smooth landing did less 100 feet judges points awarded 89 out possible 1O0 What nice day flight Zak s 1939 Nats Book said under control9 Sure wasp moment took off until glided back its master worth coming Nationals just see historic per forniance5 Joe Raspante 11-ft Super Buc caneer set up flight Sal Taibi person ever saw could hand-launch giant plane over headnot wing tip Joes plane four-tube receiver rudder control beautifully crafted powered Forster 99 control box used telephone dial five com mands up/down right/left stop engine Since photos plane show no elevator flap believe rudder engine active controls used year flight lasted almost four minutes gathered total 11 points second RC flight made 1939 Nationals account states radio interference stopped engine prematurely Elmer Wasman short flight meet third place told later best RC demonstration took place dedication new airport southern Georgia shortly after Nats According notes total six pilots attempted flights day list below shows placed P1 Name Hometown Age Points 1 Walt Bill Good Kalamazoo MI 23 89 2 Joe Raspante Brooklyn NY 29 11 3 Elmer Wasman Jacksonville FL 30 9 4 Phillip Sonheim Niellsville WI 27 8 5 Charles Siegfried Wichita KS 42 8 6 Robert Mende Flint MI 22 8 7 Erwin Leshner Philadelphia PA 20 6 8 Jesse Bieberman Philadelphia PA 34 6 9 Howard Flanigan Detroit MI 54 1 10 Chester Lanzo Cleveland OH 25 1 11 Robert Rose Highland Park MI 190 1940 NatIonals entries actual flights surprises encountered event held Chicago time 11 planes appeared 16 entries least seven made scored flights Six entries May1986 81 Ault helmet RC Guff-type plane escapement control fifth George Karpovich adjusts Custom Cava lier featuring two-escapement control Clin ton DeSoto helps transmitter controls Left Ken Harker behind Purdue UniversItys 1 21/2ft entry Model demonstrated ground flown Center Harker transmitter used tone control three-channel operation Right 1 0-tube receiver electronic tone selectIon used Harker plane repeaters five newcomers Charlie SiegfrIed Siggy Wichita largest plane 15-ft span 1 3-lb weight Forster 99 power dubbed telephone exchange because its control system rudder elevator engine basically dial telephone simi lar Raspantes system dialing given set pulses airborne selector switch would energize desired electric motor give say left rudder signal turned off rudder would return neutral similar action operated ele vator different number pulses Engine control however remained throttle position set having no automatic neutral return feature airborne collection electronics motors gears selector batteries weighed 3 lb described CE Bohnenblust Charlies radioman QST magazine carried cover photo Charlies plane6 control box size small suitcase complete neck strap made him lcok like street vendor central stick controlled rudder elevator through mechanical pulse generator details revealed long cable box led trunk Siggys car 50-watt transmitter housed typical flight Siggy would start Forster 99 hoist giant plane onto Winnie Davis shoulder quickly don control box check systemalways talking steady stream Winnie would run full speed heave plane air show repeated times meets Siggy became special characters RC circuit can still remember flights plane went dutifully through required maneuvers drifting down wind whole time finally disappearing behind trees outside airfield Spot landings thing controls did work time Siggy eamed second place closest top ever reached proud Joe Raspaate followed Siggy third place very respectable flight Super Buccaneer Jim Tom Custia Wisconsin tcok fourth place original 8-ft cabin plane weighed about 10 lb Power twin-cylinder engine built friend Ed Schunke Earlier tried Forster 99 didnt have enough power suit Tom built radio system control rudder engine7 two control channels gave variable positions based clever sequenced-selector-pulse systemalmost proportional control receiver used RK62 tube home made polarized relay servos Pittman permanent magnet motors using Continued page 171 82 Model Aviation TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals A/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED RC History/Good Continued page 82 lead-screw speed reduction transmit ter control box called wheatfield because dozen clattering relays generate pulses Hmmmdigital con trol Jim being older assumed posi tion pilot made several RC flights just before Chicago Nats Im allowed mention ended treesomething about missed pulse Toms system However day Nats Jim report summer job Lake Michigan ship Tom became pilot official flight Tom says plane got air OK made two maneuvers before ship turned wrong way went ground8 good enough fourth place Tom recently retired General Elec tric Syracuse Jim thinking about retiring job patent lawyer Milwaukee Ben Shereshaw Several planes threefunction controls rudder elevator motor REM unusual Shereshaws twin-boom pusher called RC-1 Cecil Winick Radio Control Headquarters RCH attended ad justments RCH receivers motorized escapements What pretty plane Fifth place John Ault enlarged Buccaneer awarded sixth place using escape ment rudder control Phil Sonheim another REM ship 9-ft mid-winger housed completely homemade selector electric motor system very neat compact took ninth place leamed later uncle Dick Son heim well-known present-day AMA lead er RC system never published probably because Phil turned skills secret war work shortly after Nats Im told died during war under rather mysterious circumstances pursuing work States Goods second time brother Bill able team Nats felt Guff better shape beforeand pilots hundred flights stick practice Some public demonstrations several meets Illinois Michigan Ohio Canada What surprise Bill found waiting us after first night Sherman Hotel After breakfast Wednesday morning went car hotel lot found hole Guff wing stored just beneath car ceiling dad said binoculars gone Bill said Wheres transmitter gone too After few hours discussion hotel management local police became clear recovery stolen items extremely unlikely What next question RC event scheduled next morning Thursday Bill said Walt fix wing Ill build transmitter Thats what happened Bill went Newark Radio Store State Street explained problem manager said lots parts would night inventoryand workbench back room oouldnt believe Bill never worked fast home morning came forth two radio tubes 4-ftsq piece plywood along bunch coils parts reminded overnight transmitter should touched because 400 volts exposed everywhere almost forgot temporary control box Ken Davis rigged up 400 volts too survived somehow way RC site 79th Keeler stopped open field make quick distance test OK after some tuning site word spread about stolen transmitter several fliers offered use Joe Raspante guy beaten out first Save old Timer Podp5jtiqUO si6~ GbaflW0From this.k sped rtmers potfltS Ian9 Mode Engine Parts Only Over 600 items Send *200 current catalog pAN AR 05pA C 200/o Greater Heat Resistance Impervious Exhaust Products Eliminate Burned Up & Blown Out Silicone SEND 4 SOperS/8 D Coupler or500per3/4 ID DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54580 May1986 171 III PROP ASSEMBLY #1 09-ELECTRIC ONLY PROP HUB ASSEMBLY #IOOA 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #100A Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair POOP HUB ASSEMBLY # 110 051 engines electric motor equivalent WeightS grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP 1101 ASSEMBLY N 111 0 engines electric motor equivalent 20 grams$2000 PROP BLADES FOR HUB N 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line FAI RUBBER Sizes 114 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber mdse add $1 50 UPS Over $lSaddlO% Phone O213 830-8939 H377-1959 P30 HEADQUARTERS Special kit/rubber combos NEW NEW P30 prop $2495 Coupe deVIIIe Finished prop Very very complete Tilka____ Wakefield22Fe shed F Oct End_______ KSB TIMERS Fuel Shutoff 3Osec-$1195 BminDT-$1195 $3895 plus $250 UPS Send $100 1986 Catalog F Model Supply L7 P0 Box 3557 Torrance CA 90610 NEW FROM FOX 15X 15 RC featuring all-new Mark X carburetor 42 9O muffler #21500 Bore590 Stroke . 540 Weight 45 oz RPM 7-5 prop14000 muifler installed RPM 8-4 prop 13000 muffler installed lightest weight lowest cost 15 can buy now boasts all-new Marki carburetor better-than-ever per formance Runs best lO/o nitro fuel little jewel still compact enough light enough fit models designed 09s 10s VISA Mastercard Accepted F0x MFG Co 5305 TOWSON AVE 0RT SMITH AR 72901 5011 646-1656 Easiest Hinge Install Now available scale size PRO HINGEJ use cyanoacrylate adhesives No pinning messy epoxyInstant glues neededSpecial Paper No special hinge slotter needed No alignment necessary stic Special Paper RADIO SOUTH Inc 43 West Nine Mile Rd Pensacola FL 32414 904 478-6745 place year before real sports manship Ive always very warm feeling Joe ever since cant say same Sherman Hotel meet decided fly rudder though overnight trans mitter two channels before did use elevator newly-installed throttle control Actually Guff carried two separate receivers option rudder/elevator rudder/engine might have earned some extra points Fortunately opportunity make several flights meet almost pulled off secret maneuver inside loop practicing home field using rudder con trol began using full left rudder start left circle spiraled tighter steeper turn during model picked up considerable speed nose pointing down steeply gave opposite rudder just long enough stop turn held neutral nose rotated rapidly vertical position plane stalled fell over its back recovered level flightmaldng pear-shaped loop9 meet engine quit top stall model flopped down going neatly over its back Luckily altitude sufficient glide back within 20 ft spot maxi mum landing points Note final points listed below lower year before time judges required give fewer points poorly-executed maneuvers Further Leo Weiss judges taldng postmans holiday RC target drone job Wright Field P1 Name 1 Walt Bill Good 2 Charles Siegfried 3 Joe Raspante 4 Jim Tom Custin 5 Ben Shereshaw 6 John Ault 7 Phil Sonheim 8 Elmer Wasman 9 Lester Helle 10 Jesse Bieberman 11 Bob Reder Controls R REM REM REM REM R REM R R R R Points 65 49 34 23 19 17 13 12 11 10 6 1941 Nationals event Chicago July 1-6 fifth RC last prior WW II Up time biggest best ever held field 26 RC entries yielded 12 scoring pilots three repeaters nine newoomers eight total 40 flights over three-day period first time extra days allowed tuning preparations poor weather other delays fortunate first two days plagued windy weather Siegfried Ault Reder repeaters names new comers will emerge go Bill attended meet did enter plane highly-inter ested spectators Bill honey moon finishing PhD research thesis Based sensible priorities neither us should have just couldnt miss time newcomer took first place Jim Walker Fireball Control Line fame Portland OR remembered preceding 1940 Nats Jim spent time carefully observing RC event helped Elmer Wasman launch plane Also several 1940 photos showed Jim critically watch ing RC planes judges Rumors Walkers preparations RC model leaked Bill through some letters Ed Rockwood rabid RC experimenter West Coast rumor mentioned new system called proportional control something dreamed about never seen would new exciting true Jim Walker Sure enough entry small 7-ft ship proportional rudder proportional engine speed used two standard RCH receivers relays very clever way engine control simpler two controls used two sets breaker points engines ignition system set high speed other low speed led primary spark coil wire through relay contacts two timer points Signal oft save low sneed save hish sneed RC $249/pkg 18 Scale $449/pkg 24 neat part pulsing channel gave intermediate speed Theres Changing pulsing dwell time pro duced speed between low high medium speed engine emitted distinc tive burping sound jumped between high low speed rudder channel used dwell-time pulsing used small electric motor driving through fluid coupler rudder pulled left side spring oft signal rudder left signal right Dwell-time pulsing gave 50/50 ratio neutral rudder varying pulse ratio gave desired position full left full right truly propor tional rudder following control stick first contest demonstration dual-proportional system using two independent radio channels model plane Furthermore Jim squeezed equipment small time 7-ft plane weighed 5 lb fully loaded did first taxi maneuvers ever seen proportional systemeven bumpy dirt road tricycle landing gear helped accomplishment Walker awarded 88 points out possible 100 air maneuvers spot landings taxiing clear Walkers last flight carried smoke bomb simulate skywriting skillful competitor RC competitors later Arthur Earle Close behind Walker next plane earned 83 points second place five-point gap differ ence between assisted takeoff 5 points taxi takeoff 10 points Earles 9-ft plane powered Ohlsson 60 used three controls REM original design andget thishis first model plane three controls actuated escapements three sepa rate receivers flying very con sistent spot landings stopped within 54 ft spotexcellent days Earl newcomer knowledge never flew again National Contest Charlie Siegfried using 1940 plane took third place higher score second place year before managed large loop may have first recognizable performed Nationals Ken Harker modem plane brought two electrical engineering stu dents Purdue University attracted great attention its complete complex control system Harker Dick Symonds designed built 14-tube receiver five audio channels rudder ele vator engine controls Selective audio circuits directed command signal desired electric motor control surface No sequence system delays electronic equivalent tuned-reed system used Leo Weiss 1937 ground checkout demonstrated control direction could quickly chosen control surface speed seemed quite slow us since travel time neutral full deflection about four seconds0 12-ft plane sported sleek racertype body 3A-hp Mercury Avia en gine disappointing us flown meet whole system beautifully crafted though Bill didnt bring plane satisfaction seeing two dupli cates 8-ft Guff meetthe first meet two look-alike planes present John Ault flew Guff seven times meet fifth place 50point score called plane Spook gave no explanation why2 now actively retired Arkansas Mike Thomas Pittsburgh RC Contest Director Frank Zaic Harry Copeland judges names other officials couldnt found reference material final standings P1 Name Plaae Equipment Points 1 Jim Walker 7-ft trike gear RM proportional 88 Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blend4 Chnices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balinons FILLER SB SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS r Over 1000 ToolS FREE Catalog I4FROM MicroMark Small Tool Specialists yao asa miniature issla pselt find t~atstaeeting asians ear new MiCNOMANK cafaingl Mann teals hard-ta-find . mann HUGE DISCOUNTS Na mere searctdag frnm stare fanfare New enerynhina pan need clone peer mailbas Save time sane macen Use coupon mend name addresa MICROMARK ass vi 12-201 94 Cant Main 5t Chases NJ sanee I I assneasI tnt _________________________________ snese ______ sip I L1 May1986 173 found talented showman midable opponent Only Way Iy Fabtronics Mark 3 CDI pointless system Works Great Most 2 4 Cycle engines Automatic Spark control now avaitabte moat 4 cycte engines comptene System Batteries non mci69 add $3 poss & HendI FABTRONICS 375 Isle Royal Rd Calesburg IL 61401 2541 NE 11th Court ano Beach Florida 33062 e 305 941-9119 AVAILABLE FROM LEADING DEALERS AND DISTRUBUTORS DIRECT 2 Arthur Earle 9-ft orig REM3esc 83 3 Charles Siegfried 15-ft orig REMselec tor 77 4 Marvin Hemp Miss America RE2esc 73 5 John Ault 8-ft Guff RM2esc 50 6 George Karpovich Custom Cavalier RM 2esc 39 7 HD Edwards 9-ft Cavalier RM2 elect mot 29 8 Bob Reder 8-ft Sailplane Rlesc 13 9 Ken Harker l2-ft orig REMtones 9 10 Clark Hile 8 pts 11 Cecil Winik 6 pts 12 Allen Trinuner 5 pts R er E ator M r account five-year history RC event AMA National Contest makes plain Radio Control arrived time 1941 event small new distinct category model plane family measure rapid buildup near end period number RC flights40 flights 1941 compared total 10 flights previous four years Receivers Technically airborne radio gear still highly experimental extremely fussy Tuning adjusting finicky sets occupied much contest time example receivers 45-volt B battery dropped little volt tuning relay settings redone single-tube receivers both Type 30 vacuum tube RK62 gas tube could coaxed job needed time superregenerative mode opera tion highly resistant spark ignition usually no problem Other types detector modes used three- four-tube sets did fare well extra audio tubes ad versely affected vibration especially powered models Relays Commercial units heavy expensive sensitive vibration mar ginally adequate small plate current changes available receivers Homemade relays fared better tail ored particular receivers use remember brother Bill wrote article 1940 QST magazine giving construction details homemade DG-6 polarized relay received hun dreds requests hams informa tion availability purchasing13 think fact stated built relays 500 350 magnet 150 fine wire grabbed atten tion labor winding half-mile fine wire small form forming metal parts included cost Later Sigma other commercial relays came available Control systems used during period varied may grouped several categories follows 1 Escapements ranging size oz 4 oz seen rapid positive over half models Some used escapement rudder alone others used up three channels giving rudder elevator mo tor REM Escapements would prove around years come would appear various clever arrangements 2 Sequential selector systems worked like dial telephone used Siegfried Wasman Sonheim others group pulses received selector would connect power specific control surface electric motor would move surface desired direction gave multiple controls single channel slow operated control surface timeprobably better slow boat fast airplane 3 Non-sequential selectors such Weiss 1937 tuned reeds would become very popular 195 Os time delay selecting control fraction second Harkers electronic tone selec tion system similar result Both planes ahead time such ambitious projects enormity complexity efforts involved caught unproven contest time 4 Walkers proportional pulsing also ahead its time demonstrated superbly its effective control capability DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 83401 314 221-8803 aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40 SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE 174 Model Aviation PRODUCTS FOR THE DISCERNING MODELER DYNATHRUST PROPS look great too! ALL FUTURE PRODUCTION ON ALL SIZES WILL HAVE LOGO AND TIPS PAINTED SIZES CURRENTLY AVAILABLE 13x6 15X6r 8 $700 18x6 8r 10 0 22x8 10 0 14x6 16X6 8 $800 20X6r 810 0 AddlSizesAvailobleSoonf .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74r3pak$495 4Q4r INTERCEPTOR Folding Wing Gilder U-Build-It Kit $395 4 Ready Fly $795 Add $3 postage handling first additional P0 Box68132 AIRCRAFT Co Portland OR 97268 Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship PrformanC 020 Inglnes FeeFlighl Rubber Pulse small Multi Channel R/C systems suItable 50 pears ago mas very capable aircraft mell$2195 proportioned stable model flight ao interestingKIT #102 design lending itself balsa strontaral techeiqoes Wev aol e wrale line 01 rear tavorites please send 505 tnt Flyline Cetalco prone 17031 273-0503 Sea ens ano Oistibators neited FLYLINE MODELS INC PO Box 2136 Fairfax VIrginia 22031 Transmitters easiest part RC systems since unusual limits weight size Power outputs five 40 watts normal almost used 5 6-60 MHz ham band Thanks ARRL pio neering hams having frequencies basic equipment available right time course would have better simpler radio licenses available need would solved after WW II AMA FCC developed no-exam RC license lessons learned pre WW II years five AMA National Contest RC competitionsand viable RC systems developed pioneers less-successful pioneers showed us directions followthereby help ing others avoid Undoubtedly RC development would have progressed much slowly stimulation provided contests Thanks AMA supporting organizations indi viduals made RC meets possible include Detroit Exchange Club Polks Steve Corbetts Chicago Parks Frank Nekimkens many others period next AMA Nats RC meet would take place until after end WVT II 1946in Wichita KS follow ing decades would see giant leap growth rate AMA membership num bers due primarily bursting popu larity RC competition event period still another storyor group stories Acknowledgements Thanks wife Joyce brother Bill son Terry supportand others helped research series References DeSoto Clinton B QST October 1938 Air Trails May 1939 2Grant CH ModelAirplane News September 1938 3Good Walter Air Trails January 1939 4Good William QST March 1940 Zaic Frank Walter Farynk National Model Airplane Meet Pictures 1939 6Bohnenblust CE QST August 1940 7Custin James R Model Airplane News Au gust September 1947 Custin J T Inverview September 18 1985 9Good Walter Win Air Trails November December 1940 January 1941 0DeSoto Clinton B QST September 1941 little device sounds steady beep guide right plane Easily mounts smallest planes Use connector plug receiver same servo Also tells someone frequency solid state crystal oscillator Comes ready mount full structions included WT 1 oz DIM 1 x2 3/8 x 3/4 MADE IN USA CLUB DISCOUNTS AVAILABLE * ASK * F3H IntI/JoIIy Continued page 86 Rudnick two complete 21km course managed come home minute faster Rud nick Official flying began Monday Decem ber 9 would like travel way around world contest have SEND CHECK OR MONEY ORDER TO ELECTRONIC DESIGNS INC BOX Z 1925 GREENWOOD LK TPK HEWITT NEW JERSEY 07421 PHONE 201 7281616 Plus $200 Shipping cont USA NJ Residents add 6% Sales Tax COD add $200 Allow 2 wks Shipping May1986 175 lightweight package Later other mechanDavis Al ModelAirplane News Septemlr isms single dual proportional sys 1941 tems would become popularKulick Harold Model Airplane News Oc 5 earlier slow-cycling systems used tober 1941 1937 planes Lanzo Good didnotGood William bc cit reappear after first year indicating other methods considered effec tive 1EEV ONLY
Edition: Model Aviation - 1986/05
Page Numbers: 76, 77, 78, 79, 80, 81, 82, 171, 172, 173, 174, 175
THE 1937 NATIONAL CONTEST re vealed preceding installment beginning steps RC model plane development blend two different hobbies gas-powered model planes amateur radio modeler needed produce stable controllable plane could easily carry radio gear radioman needed produce airborne radio gear tolerate environment vibration ignition noiseand hard land ings Only few individuals possessed both skills early efforts utilized least two persons stories next four Nats starting 1938 will highlight advancements happened just six entries 1937 number climbed 26 1941 year some old hands would reappear 1938 RC successes burst forth especially final prewar meet 1941 1938 Nationals second AMA Nats RC event Detroit July 9 1938 five entries Two veterans 1937 event Pat Sweeney Walt Good Chet Lanzo 1937 winner did enter time Elmer Wasman spectated due receiver problems Leo Weiss B Schiffman didnt show three new comers Clinton DeSoto Howard Flanigan Mike Roll DeS oto giant 25-lb Cub 14-ft span twin Forster engine two controls rudder elevator required four separate receivers using new RK62 three-part series concluded issue author has taken us first RC event atthe 1936 National Con test year AMA founded 50 years ago final prewar Nats 1941 Offering RC first time may have pure optimism no entrants RC established itself forever dynamic modeling class just five years later Part 3 alt Good Histryot RC Flying newcomers would arrive bolster ranks No person actually entered five prewar Nats RC events Although Wasman Good attended five officially flew four However enough repeaters present meet develop camaraderie among pioneers closeness still remains today 50 years later meet well review top fliers equipmentand observe de velopment trends toward success Fi nally well witness moments Raytheon gas tube one-tube superregen circuit Sigma relay Four transmitters four separate frequencies 56-60 MHz used operate receivers give left/right up/down flight control no signal control surfaces remained last positions No provision made automatic return neutral positions hind sight tells us non-neutral-return system may have difficult fly early stage RC Two reversible motors operated rud der independently simultaneously desired Everyone anxious see behemoth fly Total radio payload 4 lb Before Nats total flight weight 28 lb 10-in-dia wheels steel landing gear lightened bring weight just under RC event limit 25 lb maximum1 very disappointed giant Cub wasnt flown day Ive learned whether Cub ever flown 76 Model Aviation Left WaltGood RC Guff new bodyforthe 1938 Nats LesterGood Pop left ham operator Kreiiick right Right Aithough external damage plane mild lnternai damage receivers appeared awesome repaired used again Goods radio equipment 1938 Ciockwise right receiverwith Type 30 tube sensI tive relay escapement Au homemade picture taken Kalamazoo Airport few weeks afterthe 1938 Nats crash shows Walt amiiing No wonder Guff re built Rxsee side window fiying again 1938 Left DeSoto Cub second 1938 Nats sits Wayne County Airport hangar Wing 25-lb model can seen back ground Center Four RK-82 receivers controlled Cubs rudder elevator Right Cub fuselage outside hangar Its biggie Goods Big Guff new fuselage big radio compartment 12 x 15 x 6 allow easy access airborne gear relays actuators changed 1937 rig Homemade polarized relays lightweight balanced armatures resistant engine vibration would operate reliably current change iampere actuators changed homemade four-spoke escape ments mounted directly fin hori zontal stabilizer allowing very short direct mechanical connection control surfaces 1-az escapement posi tive positions very fasta few tenths second position old cycling actuator took over 3 sec lacked positive home positions Both rudder elevator op erable However rudder ac tually connected 1938 meet Howard Flanigans plane 8-ft span two large four-spoke escapements cabin rudder elevator control used two RK62 receivers 56 60 MHz Brown Jr power Pat Sweeney brought new plane Custom Cavalier well-established design Free Flight Gas arena believed used some 1937 gearwith rubberband-driven escapement rudder control Mike Roll ancient photo album see RC plane streamlined shoulder-wing type similar Cavalier used rudder control Strangely much detail written about equipment early RC models partly because re porters werent very knowledgeable about RC partly because RC event re ports brief order share space other events Nats Radio Control event Satur day July 9 windiest day Nats pioneers liked RC didnt like much wind Good ship chalked up about 30 flights since last Nats gained confidence new controls decided give try keep account 1939 flight accurate unbiased turn description Charlie Grant editor Model Airplane News2 Toward end Saturday afternoon after diligent work during entire day Walter Good radio-controlled mod el prepared flight demonstrated efficiency radio mechanism ground worked perfectly great praise due young man unique efficient mechanism em ployed Paul Kreilick radio operator shares honor mechanism complete efficient has exhibited Finally undertook fly ship though wind blowing about 20 miles per hour very gusty difficult because novelty type ship keep spectators rushing May1986 77 Left Howard Flanigan hat hIs 8-ft cabin plane two controls placed third 1938 Right Flanigans setup used two Sigma relays top two escapements bottom fastened wooden bulkhead fitted Inside cabin Left Bill Good holds Guff fuselage next new 20-watt transmitter storage bat tery 400-volt genemotor Thats portable believe new fin/rudder also added 1939 Center homemade escapement used Guff fin stab rudder elevator control also new 1939 RIght Cutaway view rud der escapement mounted Guff fin Escapement sketched oversize show details 1939 group endeavoring prepare models flight However finally model taken field motor started took off Unfortunately grass quite long some caught elevator flap deflected takeoff model immediately went stall recovered However seoond stall after zoom turned over its back made complete loop meantime Walter endeavor ing 100-yard dash back operating mechanism means hoped remedy disastrous condi tions flight Unfortunately though bottom loop model hit ground just before nosed up before Walter oould oontrol ship ship complete washout radio apparatus inside ship looked someone stirred around concrete mixer tail part mechanism damaged nose pushed spite damage hours work gone model Walter still smile commend him highly must admit smile partly fake because kicking myself being near transmitter end launch carefully instructed radio helper Paul Kreiick W8QQE hold control box oould grasp easily after galloped back launchand cautioned him move switch because never flown plane before touch rudder would have corrected stall placing Guff circling 1940 Left Biebermans transmitterwith V antenna sits top car atthe 1939 Nats Right Biebermans one-tube receiver seen through transparent panei fuseiage 78 Model Aviation Left Joe Raspanti ground-tests Super Buccaneer second 1939 Nats Note tripod-mounted controi box Center controi box used teiephone dial Rudder engine controls dialed Right four-tube receiver sensitive relay inside cabin Left Phil Sonheim fourth 1939 helper shown holding receiver package plane uncle present-dayAMA leader Dick Sonheim Right Elmer Wasman makes always-required adjustments entry just before placing third Wasmans fuselage carried RK-62 tube receiver escapement rudder didnt make successful 1939 Nats flight Irwin Leshners RC entry 1939 Nats 1940 flight dont really believe long grass deflected takeoff Grant suggested Since wing-tip-assisted launch finally released shoulder Left Phil Sonheim 9-ft 3-ch piano Right close-up homemade selector device Note use bulkheads compartments separate heavy equipment Left Wasman launches model wing tlpfrom plywood runway Model hitthe background weeds Jim Walker sits foreground Right Bob Rederand radioman pylon modelrudder-only controls May1986 79 Left Bill Good built two-channel transmitter overnight local electronics store won meet next day Center Bill Wait prepare RC Guff flight fitted rudder elevator engine control rudderwas used 1940 Nats Right Bill tuning receiver meter priorto flighta standard necessary procedure early days Photo byAl Daraghy IegTrIeaspIanewItn -orsieranaseIec tor telephone exchange behind windows Left Custin brothers Tom Jim fourth 1940 Nats 8-ft model Right Tom Custin holds 3-lb RC receiver controlsall removable unit Lull uruuruuw IUUU 1anwith Cecil Winik helping Right JohnAultandeniargedRCBuccaneerBth RC-1 wuih covers removed 5uuwu three motorizeu udpemOnts two ono-tube receivers 1941 Jim Walkers 1941 Nate winnerwith just 7-ft span pulse proportional control rud der engine speed featured trike landing gear powered Brown Jr Left Winnie Davis launches Siggys 1 4-lb RC plane Right Siegfrieds 50-watt transmitter can seen sitting cartrunk control console ground tall 1 4-footerln background Plane foreground backup Siegfried went finish third place height effect grass reduced Normally Guff would climb slowly launch stable Free Flight model first control command could delayed several minutes desired can sure learned lesson about launching wind important flight Later launching such wirrd handled quite easily same model long pilot controls start brother Bill controls instead Great Lakes ship radio operator would have flicked bit rudder before first stall Grant says further 20-mile wind crackup initial flight dis couraged other radio event contestants . evident experiences men least three four days should spent assembling testing before preparation flight days time proved insufficient prime cause lack successful flights radio models gusty weather clinched matter far flights concerned agreed statement would three years before time margin added meet schedule fact 1941 Nats would first set aside three days RC final standings 1938 Nats based ground demonstrations attemp ted flight follows 1 Walt Good Kalamazoo MI 2 Clinton DeSoto Granby CT 3 Howard Flanigan Detroit MI 4 Pat Sweeney Chicago IL 5 Michael Roll Dearborn MI though Guff given first place very satisfying win Thus end second Nats with much RC interest still no convincing demonstration actual maneuvers radio-controlled model plane3 1939 Nationals contrast 1938 Nats five RC entries 1939 Nats 16 11 actually showed up Wayne County Airport Detroit time RC event showed promise some real action Four 11 repeaters 1937 1938 Flanigan Gcod Lan zo Wasman newcomers Bieberman Leshner Mende Raspante Rose Siegfried Sonheim year judges would using point system first time ground points given workmanship control operation before actual flight flight points given several different maneuvers such cross-country return circles left right Figure8 others perfect score would net 100 points Left Earles 9-ft original REM three receivers Right Earle holdethe plane friend works control box table Transmitter located cars trunk pilots meeting judges decided would call out maneuver advance fast-talking pilot wouldnt get away describing what plane just donerather what sup posed contestant suggested model four vacuum tubes receiver should receive points receiver just tube course one-tube fliers objected judges ruled performance principal factor number parts Thank goodness models basic rudder control few also elevator control used new single RK62 gas-tube receiver Sigma relay escapement actuators trend rudder-only beginning emerge Goods weather perfect cumulus clouds very light breeze better brother Bill present first RC Nats having missed two before Gulf new fin rudder replace ments account 1938 Nats flight damage new lighter 05-oz escape ments two receivers rebuilt ver sions same Type 30 tube batteries anchored floor body instead being part receiver/relay package 1938 crash batteries integral receiver package proved decisively pound loose batteries could very destructive Lesson learned mount 80 Model Aviation Hemps Miss America RC fuselage Power Barker engine model placed fourth batteries separately 60 flights Guff several public demonstrations through out southern Michigan during 1938 high hopes might year true RC demonstration Bill pilot always took turns launched Guff running wing tip First judges called left circle followed right circle plane did both came cross-country return request plane climbed light breeze almost two minutes before judges said half-mile paint reached Bill steered 34-circle left followed -circle right headed back toward transmitter Guff soon arrived overhead com plete returnat point well over 1000 feet altitude Guff being turned back wind Figure-8 requested large left circle followed equal-sized right circle form 8 went smoothly Next Bill chose spiral dive stall optional stunt maneuver also went well home practicing spiral dive loop using just rudder control bit unreliable agreed use should mentioned though Guff both rudder elevator controls decided use rud derwith experi ence elevator receiver switched off elevator escapement pinned neutral required air maneuvers completed plane cruising 1500 feet thermal engine stopped 6 min normal 1941 next few minutes Bill repeated several maneuvers try better point score dont remember whether ploy helped control during glide worked well still altitude burn moment district radio inspec tor earlier checked ham licenses witnessing flight asked might have try stick keeping eyes plane Bill calmly asked him ham license reply No Sorry said Bill Fliers other events field collected around transmitter land ing area after word spread radio job air judges trying tell Bill make turns approach butt tell judge last task spot landing Bills job make turns saw fit get close possible Bill using steering technique keeping final turn before landing banked long possible giving quick opposite rudder level wings followedby neutral plane would float smooth landing did less 100 feet judges points awarded 89 out possible 1O0 What nice day flight Zak s 1939 Nats Book said under control9 Sure wasp moment took off until glided back its master worth coming Nationals just see historic per forniance5 Joe Raspante 11-ft Super Buc caneer set up flight Sal Taibi person ever saw could hand-launch giant plane over headnot wing tip Joes plane four-tube receiver rudder control beautifully crafted powered Forster 99 control box used telephone dial five com mands up/down right/left stop engine Since photos plane show no elevator flap believe rudder engine active controls used year flight lasted almost four minutes gathered total 11 points second RC flight made 1939 Nationals account states radio interference stopped engine prematurely Elmer Wasman short flight meet third place told later best RC demonstration took place dedication new airport southern Georgia shortly after Nats According notes total six pilots attempted flights day list below shows placed P1 Name Hometown Age Points 1 Walt Bill Good Kalamazoo MI 23 89 2 Joe Raspante Brooklyn NY 29 11 3 Elmer Wasman Jacksonville FL 30 9 4 Phillip Sonheim Niellsville WI 27 8 5 Charles Siegfried Wichita KS 42 8 6 Robert Mende Flint MI 22 8 7 Erwin Leshner Philadelphia PA 20 6 8 Jesse Bieberman Philadelphia PA 34 6 9 Howard Flanigan Detroit MI 54 1 10 Chester Lanzo Cleveland OH 25 1 11 Robert Rose Highland Park MI 190 1940 NatIonals entries actual flights surprises encountered event held Chicago time 11 planes appeared 16 entries least seven made scored flights Six entries May1986 81 Ault helmet RC Guff-type plane escapement control fifth George Karpovich adjusts Custom Cava lier featuring two-escapement control Clin ton DeSoto helps transmitter controls Left Ken Harker behind Purdue UniversItys 1 21/2ft entry Model demonstrated ground flown Center Harker transmitter used tone control three-channel operation Right 1 0-tube receiver electronic tone selectIon used Harker plane repeaters five newcomers Charlie SiegfrIed Siggy Wichita largest plane 15-ft span 1 3-lb weight Forster 99 power dubbed telephone exchange because its control system rudder elevator engine basically dial telephone simi lar Raspantes system dialing given set pulses airborne selector switch would energize desired electric motor give say left rudder signal turned off rudder would return neutral similar action operated ele vator different number pulses Engine control however remained throttle position set having no automatic neutral return feature airborne collection electronics motors gears selector batteries weighed 3 lb described CE Bohnenblust Charlies radioman QST magazine carried cover photo Charlies plane6 control box size small suitcase complete neck strap made him lcok like street vendor central stick controlled rudder elevator through mechanical pulse generator details revealed long cable box led trunk Siggys car 50-watt transmitter housed typical flight Siggy would start Forster 99 hoist giant plane onto Winnie Davis shoulder quickly don control box check systemalways talking steady stream Winnie would run full speed heave plane air show repeated times meets Siggy became special characters RC circuit can still remember flights plane went dutifully through required maneuvers drifting down wind whole time finally disappearing behind trees outside airfield Spot landings thing controls did work time Siggy eamed second place closest top ever reached proud Joe Raspaate followed Siggy third place very respectable flight Super Buccaneer Jim Tom Custia Wisconsin tcok fourth place original 8-ft cabin plane weighed about 10 lb Power twin-cylinder engine built friend Ed Schunke Earlier tried Forster 99 didnt have enough power suit Tom built radio system control rudder engine7 two control channels gave variable positions based clever sequenced-selector-pulse systemalmost proportional control receiver used RK62 tube home made polarized relay servos Pittman permanent magnet motors using Continued page 171 82 Model Aviation TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals A/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED RC History/Good Continued page 82 lead-screw speed reduction transmit ter control box called wheatfield because dozen clattering relays generate pulses Hmmmdigital con trol Jim being older assumed posi tion pilot made several RC flights just before Chicago Nats Im allowed mention ended treesomething about missed pulse Toms system However day Nats Jim report summer job Lake Michigan ship Tom became pilot official flight Tom says plane got air OK made two maneuvers before ship turned wrong way went ground8 good enough fourth place Tom recently retired General Elec tric Syracuse Jim thinking about retiring job patent lawyer Milwaukee Ben Shereshaw Several planes threefunction controls rudder elevator motor REM unusual Shereshaws twin-boom pusher called RC-1 Cecil Winick Radio Control Headquarters RCH attended ad justments RCH receivers motorized escapements What pretty plane Fifth place John Ault enlarged Buccaneer awarded sixth place using escape ment rudder control Phil Sonheim another REM ship 9-ft mid-winger housed completely homemade selector electric motor system very neat compact took ninth place leamed later uncle Dick Son heim well-known present-day AMA lead er RC system never published probably because Phil turned skills secret war work shortly after Nats Im told died during war under rather mysterious circumstances pursuing work States Goods second time brother Bill able team Nats felt Guff better shape beforeand pilots hundred flights stick practice Some public demonstrations several meets Illinois Michigan Ohio Canada What surprise Bill found waiting us after first night Sherman Hotel After breakfast Wednesday morning went car hotel lot found hole Guff wing stored just beneath car ceiling dad said binoculars gone Bill said Wheres transmitter gone too After few hours discussion hotel management local police became clear recovery stolen items extremely unlikely What next question RC event scheduled next morning Thursday Bill said Walt fix wing Ill build transmitter Thats what happened Bill went Newark Radio Store State Street explained problem manager said lots parts would night inventoryand workbench back room oouldnt believe Bill never worked fast home morning came forth two radio tubes 4-ftsq piece plywood along bunch coils parts reminded overnight transmitter should touched because 400 volts exposed everywhere almost forgot temporary control box Ken Davis rigged up 400 volts too survived somehow way RC site 79th Keeler stopped open field make quick distance test OK after some tuning site word spread about stolen transmitter several fliers offered use Joe Raspante guy beaten out first Save old Timer Podp5jtiqUO si6~ GbaflW0From this.k sped rtmers potfltS Ian9 Mode Engine Parts Only Over 600 items Send *200 current catalog pAN AR 05pA C 200/o Greater Heat Resistance Impervious Exhaust Products Eliminate Burned Up & Blown Out Silicone SEND 4 SOperS/8 D Coupler or500per3/4 ID DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54580 May1986 171 III PROP ASSEMBLY #1 09-ELECTRIC ONLY PROP HUB ASSEMBLY #IOOA 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #100A Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair POOP HUB ASSEMBLY # 110 051 engines electric motor equivalent WeightS grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP 1101 ASSEMBLY N 111 0 engines electric motor equivalent 20 grams$2000 PROP BLADES FOR HUB N 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line FAI RUBBER Sizes 114 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber mdse add $1 50 UPS Over $lSaddlO% Phone O213 830-8939 H377-1959 P30 HEADQUARTERS Special kit/rubber combos NEW NEW P30 prop $2495 Coupe deVIIIe Finished prop Very very complete Tilka____ Wakefield22Fe shed F Oct End_______ KSB TIMERS Fuel Shutoff 3Osec-$1195 BminDT-$1195 $3895 plus $250 UPS Send $100 1986 Catalog F Model Supply L7 P0 Box 3557 Torrance CA 90610 NEW FROM FOX 15X 15 RC featuring all-new Mark X carburetor 42 9O muffler #21500 Bore590 Stroke . 540 Weight 45 oz RPM 7-5 prop14000 muifler installed RPM 8-4 prop 13000 muffler installed lightest weight lowest cost 15 can buy now boasts all-new Marki carburetor better-than-ever per formance Runs best lO/o nitro fuel little jewel still compact enough light enough fit models designed 09s 10s VISA Mastercard Accepted F0x MFG Co 5305 TOWSON AVE 0RT SMITH AR 72901 5011 646-1656 Easiest Hinge Install Now available scale size PRO HINGEJ use cyanoacrylate adhesives No pinning messy epoxyInstant glues neededSpecial Paper No special hinge slotter needed No alignment necessary stic Special Paper RADIO SOUTH Inc 43 West Nine Mile Rd Pensacola FL 32414 904 478-6745 place year before real sports manship Ive always very warm feeling Joe ever since cant say same Sherman Hotel meet decided fly rudder though overnight trans mitter two channels before did use elevator newly-installed throttle control Actually Guff carried two separate receivers option rudder/elevator rudder/engine might have earned some extra points Fortunately opportunity make several flights meet almost pulled off secret maneuver inside loop practicing home field using rudder con trol began using full left rudder start left circle spiraled tighter steeper turn during model picked up considerable speed nose pointing down steeply gave opposite rudder just long enough stop turn held neutral nose rotated rapidly vertical position plane stalled fell over its back recovered level flightmaldng pear-shaped loop9 meet engine quit top stall model flopped down going neatly over its back Luckily altitude sufficient glide back within 20 ft spot maxi mum landing points Note final points listed below lower year before time judges required give fewer points poorly-executed maneuvers Further Leo Weiss judges taldng postmans holiday RC target drone job Wright Field P1 Name 1 Walt Bill Good 2 Charles Siegfried 3 Joe Raspante 4 Jim Tom Custin 5 Ben Shereshaw 6 John Ault 7 Phil Sonheim 8 Elmer Wasman 9 Lester Helle 10 Jesse Bieberman 11 Bob Reder Controls R REM REM REM REM R REM R R R R Points 65 49 34 23 19 17 13 12 11 10 6 1941 Nationals event Chicago July 1-6 fifth RC last prior WW II Up time biggest best ever held field 26 RC entries yielded 12 scoring pilots three repeaters nine newoomers eight total 40 flights over three-day period first time extra days allowed tuning preparations poor weather other delays fortunate first two days plagued windy weather Siegfried Ault Reder repeaters names new comers will emerge go Bill attended meet did enter plane highly-inter ested spectators Bill honey moon finishing PhD research thesis Based sensible priorities neither us should have just couldnt miss time newcomer took first place Jim Walker Fireball Control Line fame Portland OR remembered preceding 1940 Nats Jim spent time carefully observing RC event helped Elmer Wasman launch plane Also several 1940 photos showed Jim critically watch ing RC planes judges Rumors Walkers preparations RC model leaked Bill through some letters Ed Rockwood rabid RC experimenter West Coast rumor mentioned new system called proportional control something dreamed about never seen would new exciting true Jim Walker Sure enough entry small 7-ft ship proportional rudder proportional engine speed used two standard RCH receivers relays very clever way engine control simpler two controls used two sets breaker points engines ignition system set high speed other low speed led primary spark coil wire through relay contacts two timer points Signal oft save low sneed save hish sneed RC $249/pkg 18 Scale $449/pkg 24 neat part pulsing channel gave intermediate speed Theres Changing pulsing dwell time pro duced speed between low high medium speed engine emitted distinc tive burping sound jumped between high low speed rudder channel used dwell-time pulsing used small electric motor driving through fluid coupler rudder pulled left side spring oft signal rudder left signal right Dwell-time pulsing gave 50/50 ratio neutral rudder varying pulse ratio gave desired position full left full right truly propor tional rudder following control stick first contest demonstration dual-proportional system using two independent radio channels model plane Furthermore Jim squeezed equipment small time 7-ft plane weighed 5 lb fully loaded did first taxi maneuvers ever seen proportional systemeven bumpy dirt road tricycle landing gear helped accomplishment Walker awarded 88 points out possible 100 air maneuvers spot landings taxiing clear Walkers last flight carried smoke bomb simulate skywriting skillful competitor RC competitors later Arthur Earle Close behind Walker next plane earned 83 points second place five-point gap differ ence between assisted takeoff 5 points taxi takeoff 10 points Earles 9-ft plane powered Ohlsson 60 used three controls REM original design andget thishis first model plane three controls actuated escapements three sepa rate receivers flying very con sistent spot landings stopped within 54 ft spotexcellent days Earl newcomer knowledge never flew again National Contest Charlie Siegfried using 1940 plane took third place higher score second place year before managed large loop may have first recognizable performed Nationals Ken Harker modem plane brought two electrical engineering stu dents Purdue University attracted great attention its complete complex control system Harker Dick Symonds designed built 14-tube receiver five audio channels rudder ele vator engine controls Selective audio circuits directed command signal desired electric motor control surface No sequence system delays electronic equivalent tuned-reed system used Leo Weiss 1937 ground checkout demonstrated control direction could quickly chosen control surface speed seemed quite slow us since travel time neutral full deflection about four seconds0 12-ft plane sported sleek racertype body 3A-hp Mercury Avia en gine disappointing us flown meet whole system beautifully crafted though Bill didnt bring plane satisfaction seeing two dupli cates 8-ft Guff meetthe first meet two look-alike planes present John Ault flew Guff seven times meet fifth place 50point score called plane Spook gave no explanation why2 now actively retired Arkansas Mike Thomas Pittsburgh RC Contest Director Frank Zaic Harry Copeland judges names other officials couldnt found reference material final standings P1 Name Plaae Equipment Points 1 Jim Walker 7-ft trike gear RM proportional 88 Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blend4 Chnices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balinons FILLER SB SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS r Over 1000 ToolS FREE Catalog I4FROM MicroMark Small Tool Specialists yao asa miniature issla pselt find t~atstaeeting asians ear new MiCNOMANK cafaingl Mann teals hard-ta-find . mann HUGE DISCOUNTS Na mere searctdag frnm stare fanfare New enerynhina pan need clone peer mailbas Save time sane macen Use coupon mend name addresa MICROMARK ass vi 12-201 94 Cant Main 5t Chases NJ sanee I I assneasI tnt _________________________________ snese ______ sip I L1 May1986 173 found talented showman midable opponent Only Way Iy Fabtronics Mark 3 CDI pointless system Works Great Most 2 4 Cycle engines Automatic Spark control now avaitabte moat 4 cycte engines comptene System Batteries non mci69 add $3 poss & HendI FABTRONICS 375 Isle Royal Rd Calesburg IL 61401 2541 NE 11th Court ano Beach Florida 33062 e 305 941-9119 AVAILABLE FROM LEADING DEALERS AND DISTRUBUTORS DIRECT 2 Arthur Earle 9-ft orig REM3esc 83 3 Charles Siegfried 15-ft orig REMselec tor 77 4 Marvin Hemp Miss America RE2esc 73 5 John Ault 8-ft Guff RM2esc 50 6 George Karpovich Custom Cavalier RM 2esc 39 7 HD Edwards 9-ft Cavalier RM2 elect mot 29 8 Bob Reder 8-ft Sailplane Rlesc 13 9 Ken Harker l2-ft orig REMtones 9 10 Clark Hile 8 pts 11 Cecil Winik 6 pts 12 Allen Trinuner 5 pts R er E ator M r account five-year history RC event AMA National Contest makes plain Radio Control arrived time 1941 event small new distinct category model plane family measure rapid buildup near end period number RC flights40 flights 1941 compared total 10 flights previous four years Receivers Technically airborne radio gear still highly experimental extremely fussy Tuning adjusting finicky sets occupied much contest time example receivers 45-volt B battery dropped little volt tuning relay settings redone single-tube receivers both Type 30 vacuum tube RK62 gas tube could coaxed job needed time superregenerative mode opera tion highly resistant spark ignition usually no problem Other types detector modes used three- four-tube sets did fare well extra audio tubes ad versely affected vibration especially powered models Relays Commercial units heavy expensive sensitive vibration mar ginally adequate small plate current changes available receivers Homemade relays fared better tail ored particular receivers use remember brother Bill wrote article 1940 QST magazine giving construction details homemade DG-6 polarized relay received hun dreds requests hams informa tion availability purchasing13 think fact stated built relays 500 350 magnet 150 fine wire grabbed atten tion labor winding half-mile fine wire small form forming metal parts included cost Later Sigma other commercial relays came available Control systems used during period varied may grouped several categories follows 1 Escapements ranging size oz 4 oz seen rapid positive over half models Some used escapement rudder alone others used up three channels giving rudder elevator mo tor REM Escapements would prove around years come would appear various clever arrangements 2 Sequential selector systems worked like dial telephone used Siegfried Wasman Sonheim others group pulses received selector would connect power specific control surface electric motor would move surface desired direction gave multiple controls single channel slow operated control surface timeprobably better slow boat fast airplane 3 Non-sequential selectors such Weiss 1937 tuned reeds would become very popular 195 Os time delay selecting control fraction second Harkers electronic tone selec tion system similar result Both planes ahead time such ambitious projects enormity complexity efforts involved caught unproven contest time 4 Walkers proportional pulsing also ahead its time demonstrated superbly its effective control capability DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 83401 314 221-8803 aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40 SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE 174 Model Aviation PRODUCTS FOR THE DISCERNING MODELER DYNATHRUST PROPS look great too! ALL FUTURE PRODUCTION ON ALL SIZES WILL HAVE LOGO AND TIPS PAINTED SIZES CURRENTLY AVAILABLE 13x6 15X6r 8 $700 18x6 8r 10 0 22x8 10 0 14x6 16X6 8 $800 20X6r 810 0 AddlSizesAvailobleSoonf .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74r3pak$495 4Q4r INTERCEPTOR Folding Wing Gilder U-Build-It Kit $395 4 Ready Fly $795 Add $3 postage handling first additional P0 Box68132 AIRCRAFT Co Portland OR 97268 Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship PrformanC 020 Inglnes FeeFlighl Rubber Pulse small Multi Channel R/C systems suItable 50 pears ago mas very capable aircraft mell$2195 proportioned stable model flight ao interestingKIT #102 design lending itself balsa strontaral techeiqoes Wev aol e wrale line 01 rear tavorites please send 505 tnt Flyline Cetalco prone 17031 273-0503 Sea ens ano Oistibators neited FLYLINE MODELS INC PO Box 2136 Fairfax VIrginia 22031 Transmitters easiest part RC systems since unusual limits weight size Power outputs five 40 watts normal almost used 5 6-60 MHz ham band Thanks ARRL pio neering hams having frequencies basic equipment available right time course would have better simpler radio licenses available need would solved after WW II AMA FCC developed no-exam RC license lessons learned pre WW II years five AMA National Contest RC competitionsand viable RC systems developed pioneers less-successful pioneers showed us directions followthereby help ing others avoid Undoubtedly RC development would have progressed much slowly stimulation provided contests Thanks AMA supporting organizations indi viduals made RC meets possible include Detroit Exchange Club Polks Steve Corbetts Chicago Parks Frank Nekimkens many others period next AMA Nats RC meet would take place until after end WVT II 1946in Wichita KS follow ing decades would see giant leap growth rate AMA membership num bers due primarily bursting popu larity RC competition event period still another storyor group stories Acknowledgements Thanks wife Joyce brother Bill son Terry supportand others helped research series References DeSoto Clinton B QST October 1938 Air Trails May 1939 2Grant CH ModelAirplane News September 1938 3Good Walter Air Trails January 1939 4Good William QST March 1940 Zaic Frank Walter Farynk National Model Airplane Meet Pictures 1939 6Bohnenblust CE QST August 1940 7Custin James R Model Airplane News Au gust September 1947 Custin J T Inverview September 18 1985 9Good Walter Win Air Trails November December 1940 January 1941 0DeSoto Clinton B QST September 1941 little device sounds steady beep guide right plane Easily mounts smallest planes Use connector plug receiver same servo Also tells someone frequency solid state crystal oscillator Comes ready mount full structions included WT 1 oz DIM 1 x2 3/8 x 3/4 MADE IN USA CLUB DISCOUNTS AVAILABLE * ASK * F3H IntI/JoIIy Continued page 86 Rudnick two complete 21km course managed come home minute faster Rud nick Official flying began Monday Decem ber 9 would like travel way around world contest have SEND CHECK OR MONEY ORDER TO ELECTRONIC DESIGNS INC BOX Z 1925 GREENWOOD LK TPK HEWITT NEW JERSEY 07421 PHONE 201 7281616 Plus $200 Shipping cont USA NJ Residents add 6% Sales Tax COD add $200 Allow 2 wks Shipping May1986 175 lightweight package Later other mechanDavis Al ModelAirplane News Septemlr isms single dual proportional sys 1941 tems would become popularKulick Harold Model Airplane News Oc 5 earlier slow-cycling systems used tober 1941 1937 planes Lanzo Good didnotGood William bc cit reappear after first year indicating other methods considered effec tive 1EEV ONLY
Edition: Model Aviation - 1986/05
Page Numbers: 76, 77, 78, 79, 80, 81, 82, 171, 172, 173, 174, 175
THE 1937 NATIONAL CONTEST re vealed preceding installment beginning steps RC model plane development blend two different hobbies gas-powered model planes amateur radio modeler needed produce stable controllable plane could easily carry radio gear radioman needed produce airborne radio gear tolerate environment vibration ignition noiseand hard land ings Only few individuals possessed both skills early efforts utilized least two persons stories next four Nats starting 1938 will highlight advancements happened just six entries 1937 number climbed 26 1941 year some old hands would reappear 1938 RC successes burst forth especially final prewar meet 1941 1938 Nationals second AMA Nats RC event Detroit July 9 1938 five entries Two veterans 1937 event Pat Sweeney Walt Good Chet Lanzo 1937 winner did enter time Elmer Wasman spectated due receiver problems Leo Weiss B Schiffman didnt show three new comers Clinton DeSoto Howard Flanigan Mike Roll DeS oto giant 25-lb Cub 14-ft span twin Forster engine two controls rudder elevator required four separate receivers using new RK62 three-part series concluded issue author has taken us first RC event atthe 1936 National Con test year AMA founded 50 years ago final prewar Nats 1941 Offering RC first time may have pure optimism no entrants RC established itself forever dynamic modeling class just five years later Part 3 alt Good Histryot RC Flying newcomers would arrive bolster ranks No person actually entered five prewar Nats RC events Although Wasman Good attended five officially flew four However enough repeaters present meet develop camaraderie among pioneers closeness still remains today 50 years later meet well review top fliers equipmentand observe de velopment trends toward success Fi nally well witness moments Raytheon gas tube one-tube superregen circuit Sigma relay Four transmitters four separate frequencies 56-60 MHz used operate receivers give left/right up/down flight control no signal control surfaces remained last positions No provision made automatic return neutral positions hind sight tells us non-neutral-return system may have difficult fly early stage RC Two reversible motors operated rud der independently simultaneously desired Everyone anxious see behemoth fly Total radio payload 4 lb Before Nats total flight weight 28 lb 10-in-dia wheels steel landing gear lightened bring weight just under RC event limit 25 lb maximum1 very disappointed giant Cub wasnt flown day Ive learned whether Cub ever flown 76 Model Aviation Left WaltGood RC Guff new bodyforthe 1938 Nats LesterGood Pop left ham operator Kreiiick right Right Aithough external damage plane mild lnternai damage receivers appeared awesome repaired used again Goods radio equipment 1938 Ciockwise right receiverwith Type 30 tube sensI tive relay escapement Au homemade picture taken Kalamazoo Airport few weeks afterthe 1938 Nats crash shows Walt amiiing No wonder Guff re built Rxsee side window fiying again 1938 Left DeSoto Cub second 1938 Nats sits Wayne County Airport hangar Wing 25-lb model can seen back ground Center Four RK-82 receivers controlled Cubs rudder elevator Right Cub fuselage outside hangar Its biggie Goods Big Guff new fuselage big radio compartment 12 x 15 x 6 allow easy access airborne gear relays actuators changed 1937 rig Homemade polarized relays lightweight balanced armatures resistant engine vibration would operate reliably current change iampere actuators changed homemade four-spoke escape ments mounted directly fin hori zontal stabilizer allowing very short direct mechanical connection control surfaces 1-az escapement posi tive positions very fasta few tenths second position old cycling actuator took over 3 sec lacked positive home positions Both rudder elevator op erable However rudder ac tually connected 1938 meet Howard Flanigans plane 8-ft span two large four-spoke escapements cabin rudder elevator control used two RK62 receivers 56 60 MHz Brown Jr power Pat Sweeney brought new plane Custom Cavalier well-established design Free Flight Gas arena believed used some 1937 gearwith rubberband-driven escapement rudder control Mike Roll ancient photo album see RC plane streamlined shoulder-wing type similar Cavalier used rudder control Strangely much detail written about equipment early RC models partly because re porters werent very knowledgeable about RC partly because RC event re ports brief order share space other events Nats Radio Control event Satur day July 9 windiest day Nats pioneers liked RC didnt like much wind Good ship chalked up about 30 flights since last Nats gained confidence new controls decided give try keep account 1939 flight accurate unbiased turn description Charlie Grant editor Model Airplane News2 Toward end Saturday afternoon after diligent work during entire day Walter Good radio-controlled mod el prepared flight demonstrated efficiency radio mechanism ground worked perfectly great praise due young man unique efficient mechanism em ployed Paul Kreilick radio operator shares honor mechanism complete efficient has exhibited Finally undertook fly ship though wind blowing about 20 miles per hour very gusty difficult because novelty type ship keep spectators rushing May1986 77 Left Howard Flanigan hat hIs 8-ft cabin plane two controls placed third 1938 Right Flanigans setup used two Sigma relays top two escapements bottom fastened wooden bulkhead fitted Inside cabin Left Bill Good holds Guff fuselage next new 20-watt transmitter storage bat tery 400-volt genemotor Thats portable believe new fin/rudder also added 1939 Center homemade escapement used Guff fin stab rudder elevator control also new 1939 RIght Cutaway view rud der escapement mounted Guff fin Escapement sketched oversize show details 1939 group endeavoring prepare models flight However finally model taken field motor started took off Unfortunately grass quite long some caught elevator flap deflected takeoff model immediately went stall recovered However seoond stall after zoom turned over its back made complete loop meantime Walter endeavor ing 100-yard dash back operating mechanism means hoped remedy disastrous condi tions flight Unfortunately though bottom loop model hit ground just before nosed up before Walter oould oontrol ship ship complete washout radio apparatus inside ship looked someone stirred around concrete mixer tail part mechanism damaged nose pushed spite damage hours work gone model Walter still smile commend him highly must admit smile partly fake because kicking myself being near transmitter end launch carefully instructed radio helper Paul Kreiick W8QQE hold control box oould grasp easily after galloped back launchand cautioned him move switch because never flown plane before touch rudder would have corrected stall placing Guff circling 1940 Left Biebermans transmitterwith V antenna sits top car atthe 1939 Nats Right Biebermans one-tube receiver seen through transparent panei fuseiage 78 Model Aviation Left Joe Raspanti ground-tests Super Buccaneer second 1939 Nats Note tripod-mounted controi box Center controi box used teiephone dial Rudder engine controls dialed Right four-tube receiver sensitive relay inside cabin Left Phil Sonheim fourth 1939 helper shown holding receiver package plane uncle present-dayAMA leader Dick Sonheim Right Elmer Wasman makes always-required adjustments entry just before placing third Wasmans fuselage carried RK-62 tube receiver escapement rudder didnt make successful 1939 Nats flight Irwin Leshners RC entry 1939 Nats 1940 flight dont really believe long grass deflected takeoff Grant suggested Since wing-tip-assisted launch finally released shoulder Left Phil Sonheim 9-ft 3-ch piano Right close-up homemade selector device Note use bulkheads compartments separate heavy equipment Left Wasman launches model wing tlpfrom plywood runway Model hitthe background weeds Jim Walker sits foreground Right Bob Rederand radioman pylon modelrudder-only controls May1986 79 Left Bill Good built two-channel transmitter overnight local electronics store won meet next day Center Bill Wait prepare RC Guff flight fitted rudder elevator engine control rudderwas used 1940 Nats Right Bill tuning receiver meter priorto flighta standard necessary procedure early days Photo byAl Daraghy IegTrIeaspIanewItn -orsieranaseIec tor telephone exchange behind windows Left Custin brothers Tom Jim fourth 1940 Nats 8-ft model Right Tom Custin holds 3-lb RC receiver controlsall removable unit Lull uruuruuw IUUU 1anwith Cecil Winik helping Right JohnAultandeniargedRCBuccaneerBth RC-1 wuih covers removed 5uuwu three motorizeu udpemOnts two ono-tube receivers 1941 Jim Walkers 1941 Nate winnerwith just 7-ft span pulse proportional control rud der engine speed featured trike landing gear powered Brown Jr Left Winnie Davis launches Siggys 1 4-lb RC plane Right Siegfrieds 50-watt transmitter can seen sitting cartrunk control console ground tall 1 4-footerln background Plane foreground backup Siegfried went finish third place height effect grass reduced Normally Guff would climb slowly launch stable Free Flight model first control command could delayed several minutes desired can sure learned lesson about launching wind important flight Later launching such wirrd handled quite easily same model long pilot controls start brother Bill controls instead Great Lakes ship radio operator would have flicked bit rudder before first stall Grant says further 20-mile wind crackup initial flight dis couraged other radio event contestants . evident experiences men least three four days should spent assembling testing before preparation flight days time proved insufficient prime cause lack successful flights radio models gusty weather clinched matter far flights concerned agreed statement would three years before time margin added meet schedule fact 1941 Nats would first set aside three days RC final standings 1938 Nats based ground demonstrations attemp ted flight follows 1 Walt Good Kalamazoo MI 2 Clinton DeSoto Granby CT 3 Howard Flanigan Detroit MI 4 Pat Sweeney Chicago IL 5 Michael Roll Dearborn MI though Guff given first place very satisfying win Thus end second Nats with much RC interest still no convincing demonstration actual maneuvers radio-controlled model plane3 1939 Nationals contrast 1938 Nats five RC entries 1939 Nats 16 11 actually showed up Wayne County Airport Detroit time RC event showed promise some real action Four 11 repeaters 1937 1938 Flanigan Gcod Lan zo Wasman newcomers Bieberman Leshner Mende Raspante Rose Siegfried Sonheim year judges would using point system first time ground points given workmanship control operation before actual flight flight points given several different maneuvers such cross-country return circles left right Figure8 others perfect score would net 100 points Left Earles 9-ft original REM three receivers Right Earle holdethe plane friend works control box table Transmitter located cars trunk pilots meeting judges decided would call out maneuver advance fast-talking pilot wouldnt get away describing what plane just donerather what sup posed contestant suggested model four vacuum tubes receiver should receive points receiver just tube course one-tube fliers objected judges ruled performance principal factor number parts Thank goodness models basic rudder control few also elevator control used new single RK62 gas-tube receiver Sigma relay escapement actuators trend rudder-only beginning emerge Goods weather perfect cumulus clouds very light breeze better brother Bill present first RC Nats having missed two before Gulf new fin rudder replace ments account 1938 Nats flight damage new lighter 05-oz escape ments two receivers rebuilt ver sions same Type 30 tube batteries anchored floor body instead being part receiver/relay package 1938 crash batteries integral receiver package proved decisively pound loose batteries could very destructive Lesson learned mount 80 Model Aviation Hemps Miss America RC fuselage Power Barker engine model placed fourth batteries separately 60 flights Guff several public demonstrations through out southern Michigan during 1938 high hopes might year true RC demonstration Bill pilot always took turns launched Guff running wing tip First judges called left circle followed right circle plane did both came cross-country return request plane climbed light breeze almost two minutes before judges said half-mile paint reached Bill steered 34-circle left followed -circle right headed back toward transmitter Guff soon arrived overhead com plete returnat point well over 1000 feet altitude Guff being turned back wind Figure-8 requested large left circle followed equal-sized right circle form 8 went smoothly Next Bill chose spiral dive stall optional stunt maneuver also went well home practicing spiral dive loop using just rudder control bit unreliable agreed use should mentioned though Guff both rudder elevator controls decided use rud derwith experi ence elevator receiver switched off elevator escapement pinned neutral required air maneuvers completed plane cruising 1500 feet thermal engine stopped 6 min normal 1941 next few minutes Bill repeated several maneuvers try better point score dont remember whether ploy helped control during glide worked well still altitude burn moment district radio inspec tor earlier checked ham licenses witnessing flight asked might have try stick keeping eyes plane Bill calmly asked him ham license reply No Sorry said Bill Fliers other events field collected around transmitter land ing area after word spread radio job air judges trying tell Bill make turns approach butt tell judge last task spot landing Bills job make turns saw fit get close possible Bill using steering technique keeping final turn before landing banked long possible giving quick opposite rudder level wings followedby neutral plane would float smooth landing did less 100 feet judges points awarded 89 out possible 1O0 What nice day flight Zak s 1939 Nats Book said under control9 Sure wasp moment took off until glided back its master worth coming Nationals just see historic per forniance5 Joe Raspante 11-ft Super Buc caneer set up flight Sal Taibi person ever saw could hand-launch giant plane over headnot wing tip Joes plane four-tube receiver rudder control beautifully crafted powered Forster 99 control box used telephone dial five com mands up/down right/left stop engine Since photos plane show no elevator flap believe rudder engine active controls used year flight lasted almost four minutes gathered total 11 points second RC flight made 1939 Nationals account states radio interference stopped engine prematurely Elmer Wasman short flight meet third place told later best RC demonstration took place dedication new airport southern Georgia shortly after Nats According notes total six pilots attempted flights day list below shows placed P1 Name Hometown Age Points 1 Walt Bill Good Kalamazoo MI 23 89 2 Joe Raspante Brooklyn NY 29 11 3 Elmer Wasman Jacksonville FL 30 9 4 Phillip Sonheim Niellsville WI 27 8 5 Charles Siegfried Wichita KS 42 8 6 Robert Mende Flint MI 22 8 7 Erwin Leshner Philadelphia PA 20 6 8 Jesse Bieberman Philadelphia PA 34 6 9 Howard Flanigan Detroit MI 54 1 10 Chester Lanzo Cleveland OH 25 1 11 Robert Rose Highland Park MI 190 1940 NatIonals entries actual flights surprises encountered event held Chicago time 11 planes appeared 16 entries least seven made scored flights Six entries May1986 81 Ault helmet RC Guff-type plane escapement control fifth George Karpovich adjusts Custom Cava lier featuring two-escapement control Clin ton DeSoto helps transmitter controls Left Ken Harker behind Purdue UniversItys 1 21/2ft entry Model demonstrated ground flown Center Harker transmitter used tone control three-channel operation Right 1 0-tube receiver electronic tone selectIon used Harker plane repeaters five newcomers Charlie SiegfrIed Siggy Wichita largest plane 15-ft span 1 3-lb weight Forster 99 power dubbed telephone exchange because its control system rudder elevator engine basically dial telephone simi lar Raspantes system dialing given set pulses airborne selector switch would energize desired electric motor give say left rudder signal turned off rudder would return neutral similar action operated ele vator different number pulses Engine control however remained throttle position set having no automatic neutral return feature airborne collection electronics motors gears selector batteries weighed 3 lb described CE Bohnenblust Charlies radioman QST magazine carried cover photo Charlies plane6 control box size small suitcase complete neck strap made him lcok like street vendor central stick controlled rudder elevator through mechanical pulse generator details revealed long cable box led trunk Siggys car 50-watt transmitter housed typical flight Siggy would start Forster 99 hoist giant plane onto Winnie Davis shoulder quickly don control box check systemalways talking steady stream Winnie would run full speed heave plane air show repeated times meets Siggy became special characters RC circuit can still remember flights plane went dutifully through required maneuvers drifting down wind whole time finally disappearing behind trees outside airfield Spot landings thing controls did work time Siggy eamed second place closest top ever reached proud Joe Raspaate followed Siggy third place very respectable flight Super Buccaneer Jim Tom Custia Wisconsin tcok fourth place original 8-ft cabin plane weighed about 10 lb Power twin-cylinder engine built friend Ed Schunke Earlier tried Forster 99 didnt have enough power suit Tom built radio system control rudder engine7 two control channels gave variable positions based clever sequenced-selector-pulse systemalmost proportional control receiver used RK62 tube home made polarized relay servos Pittman permanent magnet motors using Continued page 171 82 Model Aviation TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals A/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED RC History/Good Continued page 82 lead-screw speed reduction transmit ter control box called wheatfield because dozen clattering relays generate pulses Hmmmdigital con trol Jim being older assumed posi tion pilot made several RC flights just before Chicago Nats Im allowed mention ended treesomething about missed pulse Toms system However day Nats Jim report summer job Lake Michigan ship Tom became pilot official flight Tom says plane got air OK made two maneuvers before ship turned wrong way went ground8 good enough fourth place Tom recently retired General Elec tric Syracuse Jim thinking about retiring job patent lawyer Milwaukee Ben Shereshaw Several planes threefunction controls rudder elevator motor REM unusual Shereshaws twin-boom pusher called RC-1 Cecil Winick Radio Control Headquarters RCH attended ad justments RCH receivers motorized escapements What pretty plane Fifth place John Ault enlarged Buccaneer awarded sixth place using escape ment rudder control Phil Sonheim another REM ship 9-ft mid-winger housed completely homemade selector electric motor system very neat compact took ninth place leamed later uncle Dick Son heim well-known present-day AMA lead er RC system never published probably because Phil turned skills secret war work shortly after Nats Im told died during war under rather mysterious circumstances pursuing work States Goods second time brother Bill able team Nats felt Guff better shape beforeand pilots hundred flights stick practice Some public demonstrations several meets Illinois Michigan Ohio Canada What surprise Bill found waiting us after first night Sherman Hotel After breakfast Wednesday morning went car hotel lot found hole Guff wing stored just beneath car ceiling dad said binoculars gone Bill said Wheres transmitter gone too After few hours discussion hotel management local police became clear recovery stolen items extremely unlikely What next question RC event scheduled next morning Thursday Bill said Walt fix wing Ill build transmitter Thats what happened Bill went Newark Radio Store State Street explained problem manager said lots parts would night inventoryand workbench back room oouldnt believe Bill never worked fast home morning came forth two radio tubes 4-ftsq piece plywood along bunch coils parts reminded overnight transmitter should touched because 400 volts exposed everywhere almost forgot temporary control box Ken Davis rigged up 400 volts too survived somehow way RC site 79th Keeler stopped open field make quick distance test OK after some tuning site word spread about stolen transmitter several fliers offered use Joe Raspante guy beaten out first Save old Timer Podp5jtiqUO si6~ GbaflW0From this.k sped rtmers potfltS Ian9 Mode Engine Parts Only Over 600 items Send *200 current catalog pAN AR 05pA C 200/o Greater Heat Resistance Impervious Exhaust Products Eliminate Burned Up & Blown Out Silicone SEND 4 SOperS/8 D Coupler or500per3/4 ID DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54580 May1986 171 III PROP ASSEMBLY #1 09-ELECTRIC ONLY PROP HUB ASSEMBLY #IOOA 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #100A Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair POOP HUB ASSEMBLY # 110 051 engines electric motor equivalent WeightS grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP 1101 ASSEMBLY N 111 0 engines electric motor equivalent 20 grams$2000 PROP BLADES FOR HUB N 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line FAI RUBBER Sizes 114 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber mdse add $1 50 UPS Over $lSaddlO% Phone O213 830-8939 H377-1959 P30 HEADQUARTERS Special kit/rubber combos NEW NEW P30 prop $2495 Coupe deVIIIe Finished prop Very very complete Tilka____ Wakefield22Fe shed F Oct End_______ KSB TIMERS Fuel Shutoff 3Osec-$1195 BminDT-$1195 $3895 plus $250 UPS Send $100 1986 Catalog F Model Supply L7 P0 Box 3557 Torrance CA 90610 NEW FROM FOX 15X 15 RC featuring all-new Mark X carburetor 42 9O muffler #21500 Bore590 Stroke . 540 Weight 45 oz RPM 7-5 prop14000 muifler installed RPM 8-4 prop 13000 muffler installed lightest weight lowest cost 15 can buy now boasts all-new Marki carburetor better-than-ever per formance Runs best lO/o nitro fuel little jewel still compact enough light enough fit models designed 09s 10s VISA Mastercard Accepted F0x MFG Co 5305 TOWSON AVE 0RT SMITH AR 72901 5011 646-1656 Easiest Hinge Install Now available scale size PRO HINGEJ use cyanoacrylate adhesives No pinning messy epoxyInstant glues neededSpecial Paper No special hinge slotter needed No alignment necessary stic Special Paper RADIO SOUTH Inc 43 West Nine Mile Rd Pensacola FL 32414 904 478-6745 place year before real sports manship Ive always very warm feeling Joe ever since cant say same Sherman Hotel meet decided fly rudder though overnight trans mitter two channels before did use elevator newly-installed throttle control Actually Guff carried two separate receivers option rudder/elevator rudder/engine might have earned some extra points Fortunately opportunity make several flights meet almost pulled off secret maneuver inside loop practicing home field using rudder con trol began using full left rudder start left circle spiraled tighter steeper turn during model picked up considerable speed nose pointing down steeply gave opposite rudder just long enough stop turn held neutral nose rotated rapidly vertical position plane stalled fell over its back recovered level flightmaldng pear-shaped loop9 meet engine quit top stall model flopped down going neatly over its back Luckily altitude sufficient glide back within 20 ft spot maxi mum landing points Note final points listed below lower year before time judges required give fewer points poorly-executed maneuvers Further Leo Weiss judges taldng postmans holiday RC target drone job Wright Field P1 Name 1 Walt Bill Good 2 Charles Siegfried 3 Joe Raspante 4 Jim Tom Custin 5 Ben Shereshaw 6 John Ault 7 Phil Sonheim 8 Elmer Wasman 9 Lester Helle 10 Jesse Bieberman 11 Bob Reder Controls R REM REM REM REM R REM R R R R Points 65 49 34 23 19 17 13 12 11 10 6 1941 Nationals event Chicago July 1-6 fifth RC last prior WW II Up time biggest best ever held field 26 RC entries yielded 12 scoring pilots three repeaters nine newoomers eight total 40 flights over three-day period first time extra days allowed tuning preparations poor weather other delays fortunate first two days plagued windy weather Siegfried Ault Reder repeaters names new comers will emerge go Bill attended meet did enter plane highly-inter ested spectators Bill honey moon finishing PhD research thesis Based sensible priorities neither us should have just couldnt miss time newcomer took first place Jim Walker Fireball Control Line fame Portland OR remembered preceding 1940 Nats Jim spent time carefully observing RC event helped Elmer Wasman launch plane Also several 1940 photos showed Jim critically watch ing RC planes judges Rumors Walkers preparations RC model leaked Bill through some letters Ed Rockwood rabid RC experimenter West Coast rumor mentioned new system called proportional control something dreamed about never seen would new exciting true Jim Walker Sure enough entry small 7-ft ship proportional rudder proportional engine speed used two standard RCH receivers relays very clever way engine control simpler two controls used two sets breaker points engines ignition system set high speed other low speed led primary spark coil wire through relay contacts two timer points Signal oft save low sneed save hish sneed RC $249/pkg 18 Scale $449/pkg 24 neat part pulsing channel gave intermediate speed Theres Changing pulsing dwell time pro duced speed between low high medium speed engine emitted distinc tive burping sound jumped between high low speed rudder channel used dwell-time pulsing used small electric motor driving through fluid coupler rudder pulled left side spring oft signal rudder left signal right Dwell-time pulsing gave 50/50 ratio neutral rudder varying pulse ratio gave desired position full left full right truly propor tional rudder following control stick first contest demonstration dual-proportional system using two independent radio channels model plane Furthermore Jim squeezed equipment small time 7-ft plane weighed 5 lb fully loaded did first taxi maneuvers ever seen proportional systemeven bumpy dirt road tricycle landing gear helped accomplishment Walker awarded 88 points out possible 100 air maneuvers spot landings taxiing clear Walkers last flight carried smoke bomb simulate skywriting skillful competitor RC competitors later Arthur Earle Close behind Walker next plane earned 83 points second place five-point gap differ ence between assisted takeoff 5 points taxi takeoff 10 points Earles 9-ft plane powered Ohlsson 60 used three controls REM original design andget thishis first model plane three controls actuated escapements three sepa rate receivers flying very con sistent spot landings stopped within 54 ft spotexcellent days Earl newcomer knowledge never flew again National Contest Charlie Siegfried using 1940 plane took third place higher score second place year before managed large loop may have first recognizable performed Nationals Ken Harker modem plane brought two electrical engineering stu dents Purdue University attracted great attention its complete complex control system Harker Dick Symonds designed built 14-tube receiver five audio channels rudder ele vator engine controls Selective audio circuits directed command signal desired electric motor control surface No sequence system delays electronic equivalent tuned-reed system used Leo Weiss 1937 ground checkout demonstrated control direction could quickly chosen control surface speed seemed quite slow us since travel time neutral full deflection about four seconds0 12-ft plane sported sleek racertype body 3A-hp Mercury Avia en gine disappointing us flown meet whole system beautifully crafted though Bill didnt bring plane satisfaction seeing two dupli cates 8-ft Guff meetthe first meet two look-alike planes present John Ault flew Guff seven times meet fifth place 50point score called plane Spook gave no explanation why2 now actively retired Arkansas Mike Thomas Pittsburgh RC Contest Director Frank Zaic Harry Copeland judges names other officials couldnt found reference material final standings P1 Name Plaae Equipment Points 1 Jim Walker 7-ft trike gear RM proportional 88 Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blend4 Chnices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balinons FILLER SB SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS r Over 1000 ToolS FREE Catalog I4FROM MicroMark Small Tool Specialists yao asa miniature issla pselt find t~atstaeeting asians ear new MiCNOMANK cafaingl Mann teals hard-ta-find . mann HUGE DISCOUNTS Na mere searctdag frnm stare fanfare New enerynhina pan need clone peer mailbas Save time sane macen Use coupon mend name addresa MICROMARK ass vi 12-201 94 Cant Main 5t Chases NJ sanee I I assneasI tnt _________________________________ snese ______ sip I L1 May1986 173 found talented showman midable opponent Only Way Iy Fabtronics Mark 3 CDI pointless system Works Great Most 2 4 Cycle engines Automatic Spark control now avaitabte moat 4 cycte engines comptene System Batteries non mci69 add $3 poss & HendI FABTRONICS 375 Isle Royal Rd Calesburg IL 61401 2541 NE 11th Court ano Beach Florida 33062 e 305 941-9119 AVAILABLE FROM LEADING DEALERS AND DISTRUBUTORS DIRECT 2 Arthur Earle 9-ft orig REM3esc 83 3 Charles Siegfried 15-ft orig REMselec tor 77 4 Marvin Hemp Miss America RE2esc 73 5 John Ault 8-ft Guff RM2esc 50 6 George Karpovich Custom Cavalier RM 2esc 39 7 HD Edwards 9-ft Cavalier RM2 elect mot 29 8 Bob Reder 8-ft Sailplane Rlesc 13 9 Ken Harker l2-ft orig REMtones 9 10 Clark Hile 8 pts 11 Cecil Winik 6 pts 12 Allen Trinuner 5 pts R er E ator M r account five-year history RC event AMA National Contest makes plain Radio Control arrived time 1941 event small new distinct category model plane family measure rapid buildup near end period number RC flights40 flights 1941 compared total 10 flights previous four years Receivers Technically airborne radio gear still highly experimental extremely fussy Tuning adjusting finicky sets occupied much contest time example receivers 45-volt B battery dropped little volt tuning relay settings redone single-tube receivers both Type 30 vacuum tube RK62 gas tube could coaxed job needed time superregenerative mode opera tion highly resistant spark ignition usually no problem Other types detector modes used three- four-tube sets did fare well extra audio tubes ad versely affected vibration especially powered models Relays Commercial units heavy expensive sensitive vibration mar ginally adequate small plate current changes available receivers Homemade relays fared better tail ored particular receivers use remember brother Bill wrote article 1940 QST magazine giving construction details homemade DG-6 polarized relay received hun dreds requests hams informa tion availability purchasing13 think fact stated built relays 500 350 magnet 150 fine wire grabbed atten tion labor winding half-mile fine wire small form forming metal parts included cost Later Sigma other commercial relays came available Control systems used during period varied may grouped several categories follows 1 Escapements ranging size oz 4 oz seen rapid positive over half models Some used escapement rudder alone others used up three channels giving rudder elevator mo tor REM Escapements would prove around years come would appear various clever arrangements 2 Sequential selector systems worked like dial telephone used Siegfried Wasman Sonheim others group pulses received selector would connect power specific control surface electric motor would move surface desired direction gave multiple controls single channel slow operated control surface timeprobably better slow boat fast airplane 3 Non-sequential selectors such Weiss 1937 tuned reeds would become very popular 195 Os time delay selecting control fraction second Harkers electronic tone selec tion system similar result Both planes ahead time such ambitious projects enormity complexity efforts involved caught unproven contest time 4 Walkers proportional pulsing also ahead its time demonstrated superbly its effective control capability DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 83401 314 221-8803 aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40 SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE 174 Model Aviation PRODUCTS FOR THE DISCERNING MODELER DYNATHRUST PROPS look great too! ALL FUTURE PRODUCTION ON ALL SIZES WILL HAVE LOGO AND TIPS PAINTED SIZES CURRENTLY AVAILABLE 13x6 15X6r 8 $700 18x6 8r 10 0 22x8 10 0 14x6 16X6 8 $800 20X6r 810 0 AddlSizesAvailobleSoonf .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74r3pak$495 4Q4r INTERCEPTOR Folding Wing Gilder U-Build-It Kit $395 4 Ready Fly $795 Add $3 postage handling first additional P0 Box68132 AIRCRAFT Co Portland OR 97268 Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship PrformanC 020 Inglnes FeeFlighl Rubber Pulse small Multi Channel R/C systems suItable 50 pears ago mas very capable aircraft mell$2195 proportioned stable model flight ao interestingKIT #102 design lending itself balsa strontaral techeiqoes Wev aol e wrale line 01 rear tavorites please send 505 tnt Flyline Cetalco prone 17031 273-0503 Sea ens ano Oistibators neited FLYLINE MODELS INC PO Box 2136 Fairfax VIrginia 22031 Transmitters easiest part RC systems since unusual limits weight size Power outputs five 40 watts normal almost used 5 6-60 MHz ham band Thanks ARRL pio neering hams having frequencies basic equipment available right time course would have better simpler radio licenses available need would solved after WW II AMA FCC developed no-exam RC license lessons learned pre WW II years five AMA National Contest RC competitionsand viable RC systems developed pioneers less-successful pioneers showed us directions followthereby help ing others avoid Undoubtedly RC development would have progressed much slowly stimulation provided contests Thanks AMA supporting organizations indi viduals made RC meets possible include Detroit Exchange Club Polks Steve Corbetts Chicago Parks Frank Nekimkens many others period next AMA Nats RC meet would take place until after end WVT II 1946in Wichita KS follow ing decades would see giant leap growth rate AMA membership num bers due primarily bursting popu larity RC competition event period still another storyor group stories Acknowledgements Thanks wife Joyce brother Bill son Terry supportand others helped research series References DeSoto Clinton B QST October 1938 Air Trails May 1939 2Grant CH ModelAirplane News September 1938 3Good Walter Air Trails January 1939 4Good William QST March 1940 Zaic Frank Walter Farynk National Model Airplane Meet Pictures 1939 6Bohnenblust CE QST August 1940 7Custin James R Model Airplane News Au gust September 1947 Custin J T Inverview September 18 1985 9Good Walter Win Air Trails November December 1940 January 1941 0DeSoto Clinton B QST September 1941 little device sounds steady beep guide right plane Easily mounts smallest planes Use connector plug receiver same servo Also tells someone frequency solid state crystal oscillator Comes ready mount full structions included WT 1 oz DIM 1 x2 3/8 x 3/4 MADE IN USA CLUB DISCOUNTS AVAILABLE * ASK * F3H IntI/JoIIy Continued page 86 Rudnick two complete 21km course managed come home minute faster Rud nick Official flying began Monday Decem ber 9 would like travel way around world contest have SEND CHECK OR MONEY ORDER TO ELECTRONIC DESIGNS INC BOX Z 1925 GREENWOOD LK TPK HEWITT NEW JERSEY 07421 PHONE 201 7281616 Plus $200 Shipping cont USA NJ Residents add 6% Sales Tax COD add $200 Allow 2 wks Shipping May1986 175 lightweight package Later other mechanDavis Al ModelAirplane News Septemlr isms single dual proportional sys 1941 tems would become popularKulick Harold Model Airplane News Oc 5 earlier slow-cycling systems used tober 1941 1937 planes Lanzo Good didnotGood William bc cit reappear after first year indicating other methods considered effec tive 1EEV ONLY
Edition: Model Aviation - 1986/05
Page Numbers: 76, 77, 78, 79, 80, 81, 82, 171, 172, 173, 174, 175
THE 1937 NATIONAL CONTEST re vealed preceding installment beginning steps RC model plane development blend two different hobbies gas-powered model planes amateur radio modeler needed produce stable controllable plane could easily carry radio gear radioman needed produce airborne radio gear tolerate environment vibration ignition noiseand hard land ings Only few individuals possessed both skills early efforts utilized least two persons stories next four Nats starting 1938 will highlight advancements happened just six entries 1937 number climbed 26 1941 year some old hands would reappear 1938 RC successes burst forth especially final prewar meet 1941 1938 Nationals second AMA Nats RC event Detroit July 9 1938 five entries Two veterans 1937 event Pat Sweeney Walt Good Chet Lanzo 1937 winner did enter time Elmer Wasman spectated due receiver problems Leo Weiss B Schiffman didnt show three new comers Clinton DeSoto Howard Flanigan Mike Roll DeS oto giant 25-lb Cub 14-ft span twin Forster engine two controls rudder elevator required four separate receivers using new RK62 three-part series concluded issue author has taken us first RC event atthe 1936 National Con test year AMA founded 50 years ago final prewar Nats 1941 Offering RC first time may have pure optimism no entrants RC established itself forever dynamic modeling class just five years later Part 3 alt Good Histryot RC Flying newcomers would arrive bolster ranks No person actually entered five prewar Nats RC events Although Wasman Good attended five officially flew four However enough repeaters present meet develop camaraderie among pioneers closeness still remains today 50 years later meet well review top fliers equipmentand observe de velopment trends toward success Fi nally well witness moments Raytheon gas tube one-tube superregen circuit Sigma relay Four transmitters four separate frequencies 56-60 MHz used operate receivers give left/right up/down flight control no signal control surfaces remained last positions No provision made automatic return neutral positions hind sight tells us non-neutral-return system may have difficult fly early stage RC Two reversible motors operated rud der independently simultaneously desired Everyone anxious see behemoth fly Total radio payload 4 lb Before Nats total flight weight 28 lb 10-in-dia wheels steel landing gear lightened bring weight just under RC event limit 25 lb maximum1 very disappointed giant Cub wasnt flown day Ive learned whether Cub ever flown 76 Model Aviation Left WaltGood RC Guff new bodyforthe 1938 Nats LesterGood Pop left ham operator Kreiiick right Right Aithough external damage plane mild lnternai damage receivers appeared awesome repaired used again Goods radio equipment 1938 Ciockwise right receiverwith Type 30 tube sensI tive relay escapement Au homemade picture taken Kalamazoo Airport few weeks afterthe 1938 Nats crash shows Walt amiiing No wonder Guff re built Rxsee side window fiying again 1938 Left DeSoto Cub second 1938 Nats sits Wayne County Airport hangar Wing 25-lb model can seen back ground Center Four RK-82 receivers controlled Cubs rudder elevator Right Cub fuselage outside hangar Its biggie Goods Big Guff new fuselage big radio compartment 12 x 15 x 6 allow easy access airborne gear relays actuators changed 1937 rig Homemade polarized relays lightweight balanced armatures resistant engine vibration would operate reliably current change iampere actuators changed homemade four-spoke escape ments mounted directly fin hori zontal stabilizer allowing very short direct mechanical connection control surfaces 1-az escapement posi tive positions very fasta few tenths second position old cycling actuator took over 3 sec lacked positive home positions Both rudder elevator op erable However rudder ac tually connected 1938 meet Howard Flanigans plane 8-ft span two large four-spoke escapements cabin rudder elevator control used two RK62 receivers 56 60 MHz Brown Jr power Pat Sweeney brought new plane Custom Cavalier well-established design Free Flight Gas arena believed used some 1937 gearwith rubberband-driven escapement rudder control Mike Roll ancient photo album see RC plane streamlined shoulder-wing type similar Cavalier used rudder control Strangely much detail written about equipment early RC models partly because re porters werent very knowledgeable about RC partly because RC event re ports brief order share space other events Nats Radio Control event Satur day July 9 windiest day Nats pioneers liked RC didnt like much wind Good ship chalked up about 30 flights since last Nats gained confidence new controls decided give try keep account 1939 flight accurate unbiased turn description Charlie Grant editor Model Airplane News2 Toward end Saturday afternoon after diligent work during entire day Walter Good radio-controlled mod el prepared flight demonstrated efficiency radio mechanism ground worked perfectly great praise due young man unique efficient mechanism em ployed Paul Kreilick radio operator shares honor mechanism complete efficient has exhibited Finally undertook fly ship though wind blowing about 20 miles per hour very gusty difficult because novelty type ship keep spectators rushing May1986 77 Left Howard Flanigan hat hIs 8-ft cabin plane two controls placed third 1938 Right Flanigans setup used two Sigma relays top two escapements bottom fastened wooden bulkhead fitted Inside cabin Left Bill Good holds Guff fuselage next new 20-watt transmitter storage bat tery 400-volt genemotor Thats portable believe new fin/rudder also added 1939 Center homemade escapement used Guff fin stab rudder elevator control also new 1939 RIght Cutaway view rud der escapement mounted Guff fin Escapement sketched oversize show details 1939 group endeavoring prepare models flight However finally model taken field motor started took off Unfortunately grass quite long some caught elevator flap deflected takeoff model immediately went stall recovered However seoond stall after zoom turned over its back made complete loop meantime Walter endeavor ing 100-yard dash back operating mechanism means hoped remedy disastrous condi tions flight Unfortunately though bottom loop model hit ground just before nosed up before Walter oould oontrol ship ship complete washout radio apparatus inside ship looked someone stirred around concrete mixer tail part mechanism damaged nose pushed spite damage hours work gone model Walter still smile commend him highly must admit smile partly fake because kicking myself being near transmitter end launch carefully instructed radio helper Paul Kreiick W8QQE hold control box oould grasp easily after galloped back launchand cautioned him move switch because never flown plane before touch rudder would have corrected stall placing Guff circling 1940 Left Biebermans transmitterwith V antenna sits top car atthe 1939 Nats Right Biebermans one-tube receiver seen through transparent panei fuseiage 78 Model Aviation Left Joe Raspanti ground-tests Super Buccaneer second 1939 Nats Note tripod-mounted controi box Center controi box used teiephone dial Rudder engine controls dialed Right four-tube receiver sensitive relay inside cabin Left Phil Sonheim fourth 1939 helper shown holding receiver package plane uncle present-dayAMA leader Dick Sonheim Right Elmer Wasman makes always-required adjustments entry just before placing third Wasmans fuselage carried RK-62 tube receiver escapement rudder didnt make successful 1939 Nats flight Irwin Leshners RC entry 1939 Nats 1940 flight dont really believe long grass deflected takeoff Grant suggested Since wing-tip-assisted launch finally released shoulder Left Phil Sonheim 9-ft 3-ch piano Right close-up homemade selector device Note use bulkheads compartments separate heavy equipment Left Wasman launches model wing tlpfrom plywood runway Model hitthe background weeds Jim Walker sits foreground Right Bob Rederand radioman pylon modelrudder-only controls May1986 79 Left Bill Good built two-channel transmitter overnight local electronics store won meet next day Center Bill Wait prepare RC Guff flight fitted rudder elevator engine control rudderwas used 1940 Nats Right Bill tuning receiver meter priorto flighta standard necessary procedure early days Photo byAl Daraghy IegTrIeaspIanewItn -orsieranaseIec tor telephone exchange behind windows Left Custin brothers Tom Jim fourth 1940 Nats 8-ft model Right Tom Custin holds 3-lb RC receiver controlsall removable unit Lull uruuruuw IUUU 1anwith Cecil Winik helping Right JohnAultandeniargedRCBuccaneerBth RC-1 wuih covers removed 5uuwu three motorizeu udpemOnts two ono-tube receivers 1941 Jim Walkers 1941 Nate winnerwith just 7-ft span pulse proportional control rud der engine speed featured trike landing gear powered Brown Jr Left Winnie Davis launches Siggys 1 4-lb RC plane Right Siegfrieds 50-watt transmitter can seen sitting cartrunk control console ground tall 1 4-footerln background Plane foreground backup Siegfried went finish third place height effect grass reduced Normally Guff would climb slowly launch stable Free Flight model first control command could delayed several minutes desired can sure learned lesson about launching wind important flight Later launching such wirrd handled quite easily same model long pilot controls start brother Bill controls instead Great Lakes ship radio operator would have flicked bit rudder before first stall Grant says further 20-mile wind crackup initial flight dis couraged other radio event contestants . evident experiences men least three four days should spent assembling testing before preparation flight days time proved insufficient prime cause lack successful flights radio models gusty weather clinched matter far flights concerned agreed statement would three years before time margin added meet schedule fact 1941 Nats would first set aside three days RC final standings 1938 Nats based ground demonstrations attemp ted flight follows 1 Walt Good Kalamazoo MI 2 Clinton DeSoto Granby CT 3 Howard Flanigan Detroit MI 4 Pat Sweeney Chicago IL 5 Michael Roll Dearborn MI though Guff given first place very satisfying win Thus end second Nats with much RC interest still no convincing demonstration actual maneuvers radio-controlled model plane3 1939 Nationals contrast 1938 Nats five RC entries 1939 Nats 16 11 actually showed up Wayne County Airport Detroit time RC event showed promise some real action Four 11 repeaters 1937 1938 Flanigan Gcod Lan zo Wasman newcomers Bieberman Leshner Mende Raspante Rose Siegfried Sonheim year judges would using point system first time ground points given workmanship control operation before actual flight flight points given several different maneuvers such cross-country return circles left right Figure8 others perfect score would net 100 points Left Earles 9-ft original REM three receivers Right Earle holdethe plane friend works control box table Transmitter located cars trunk pilots meeting judges decided would call out maneuver advance fast-talking pilot wouldnt get away describing what plane just donerather what sup posed contestant suggested model four vacuum tubes receiver should receive points receiver just tube course one-tube fliers objected judges ruled performance principal factor number parts Thank goodness models basic rudder control few also elevator control used new single RK62 gas-tube receiver Sigma relay escapement actuators trend rudder-only beginning emerge Goods weather perfect cumulus clouds very light breeze better brother Bill present first RC Nats having missed two before Gulf new fin rudder replace ments account 1938 Nats flight damage new lighter 05-oz escape ments two receivers rebuilt ver sions same Type 30 tube batteries anchored floor body instead being part receiver/relay package 1938 crash batteries integral receiver package proved decisively pound loose batteries could very destructive Lesson learned mount 80 Model Aviation Hemps Miss America RC fuselage Power Barker engine model placed fourth batteries separately 60 flights Guff several public demonstrations through out southern Michigan during 1938 high hopes might year true RC demonstration Bill pilot always took turns launched Guff running wing tip First judges called left circle followed right circle plane did both came cross-country return request plane climbed light breeze almost two minutes before judges said half-mile paint reached Bill steered 34-circle left followed -circle right headed back toward transmitter Guff soon arrived overhead com plete returnat point well over 1000 feet altitude Guff being turned back wind Figure-8 requested large left circle followed equal-sized right circle form 8 went smoothly Next Bill chose spiral dive stall optional stunt maneuver also went well home practicing spiral dive loop using just rudder control bit unreliable agreed use should mentioned though Guff both rudder elevator controls decided use rud derwith experi ence elevator receiver switched off elevator escapement pinned neutral required air maneuvers completed plane cruising 1500 feet thermal engine stopped 6 min normal 1941 next few minutes Bill repeated several maneuvers try better point score dont remember whether ploy helped control during glide worked well still altitude burn moment district radio inspec tor earlier checked ham licenses witnessing flight asked might have try stick keeping eyes plane Bill calmly asked him ham license reply No Sorry said Bill Fliers other events field collected around transmitter land ing area after word spread radio job air judges trying tell Bill make turns approach butt tell judge last task spot landing Bills job make turns saw fit get close possible Bill using steering technique keeping final turn before landing banked long possible giving quick opposite rudder level wings followedby neutral plane would float smooth landing did less 100 feet judges points awarded 89 out possible 1O0 What nice day flight Zak s 1939 Nats Book said under control9 Sure wasp moment took off until glided back its master worth coming Nationals just see historic per forniance5 Joe Raspante 11-ft Super Buc caneer set up flight Sal Taibi person ever saw could hand-launch giant plane over headnot wing tip Joes plane four-tube receiver rudder control beautifully crafted powered Forster 99 control box used telephone dial five com mands up/down right/left stop engine Since photos plane show no elevator flap believe rudder engine active controls used year flight lasted almost four minutes gathered total 11 points second RC flight made 1939 Nationals account states radio interference stopped engine prematurely Elmer Wasman short flight meet third place told later best RC demonstration took place dedication new airport southern Georgia shortly after Nats According notes total six pilots attempted flights day list below shows placed P1 Name Hometown Age Points 1 Walt Bill Good Kalamazoo MI 23 89 2 Joe Raspante Brooklyn NY 29 11 3 Elmer Wasman Jacksonville FL 30 9 4 Phillip Sonheim Niellsville WI 27 8 5 Charles Siegfried Wichita KS 42 8 6 Robert Mende Flint MI 22 8 7 Erwin Leshner Philadelphia PA 20 6 8 Jesse Bieberman Philadelphia PA 34 6 9 Howard Flanigan Detroit MI 54 1 10 Chester Lanzo Cleveland OH 25 1 11 Robert Rose Highland Park MI 190 1940 NatIonals entries actual flights surprises encountered event held Chicago time 11 planes appeared 16 entries least seven made scored flights Six entries May1986 81 Ault helmet RC Guff-type plane escapement control fifth George Karpovich adjusts Custom Cava lier featuring two-escapement control Clin ton DeSoto helps transmitter controls Left Ken Harker behind Purdue UniversItys 1 21/2ft entry Model demonstrated ground flown Center Harker transmitter used tone control three-channel operation Right 1 0-tube receiver electronic tone selectIon used Harker plane repeaters five newcomers Charlie SiegfrIed Siggy Wichita largest plane 15-ft span 1 3-lb weight Forster 99 power dubbed telephone exchange because its control system rudder elevator engine basically dial telephone simi lar Raspantes system dialing given set pulses airborne selector switch would energize desired electric motor give say left rudder signal turned off rudder would return neutral similar action operated ele vator different number pulses Engine control however remained throttle position set having no automatic neutral return feature airborne collection electronics motors gears selector batteries weighed 3 lb described CE Bohnenblust Charlies radioman QST magazine carried cover photo Charlies plane6 control box size small suitcase complete neck strap made him lcok like street vendor central stick controlled rudder elevator through mechanical pulse generator details revealed long cable box led trunk Siggys car 50-watt transmitter housed typical flight Siggy would start Forster 99 hoist giant plane onto Winnie Davis shoulder quickly don control box check systemalways talking steady stream Winnie would run full speed heave plane air show repeated times meets Siggy became special characters RC circuit can still remember flights plane went dutifully through required maneuvers drifting down wind whole time finally disappearing behind trees outside airfield Spot landings thing controls did work time Siggy eamed second place closest top ever reached proud Joe Raspaate followed Siggy third place very respectable flight Super Buccaneer Jim Tom Custia Wisconsin tcok fourth place original 8-ft cabin plane weighed about 10 lb Power twin-cylinder engine built friend Ed Schunke Earlier tried Forster 99 didnt have enough power suit Tom built radio system control rudder engine7 two control channels gave variable positions based clever sequenced-selector-pulse systemalmost proportional control receiver used RK62 tube home made polarized relay servos Pittman permanent magnet motors using Continued page 171 82 Model Aviation TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals A/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED RC History/Good Continued page 82 lead-screw speed reduction transmit ter control box called wheatfield because dozen clattering relays generate pulses Hmmmdigital con trol Jim being older assumed posi tion pilot made several RC flights just before Chicago Nats Im allowed mention ended treesomething about missed pulse Toms system However day Nats Jim report summer job Lake Michigan ship Tom became pilot official flight Tom says plane got air OK made two maneuvers before ship turned wrong way went ground8 good enough fourth place Tom recently retired General Elec tric Syracuse Jim thinking about retiring job patent lawyer Milwaukee Ben Shereshaw Several planes threefunction controls rudder elevator motor REM unusual Shereshaws twin-boom pusher called RC-1 Cecil Winick Radio Control Headquarters RCH attended ad justments RCH receivers motorized escapements What pretty plane Fifth place John Ault enlarged Buccaneer awarded sixth place using escape ment rudder control Phil Sonheim another REM ship 9-ft mid-winger housed completely homemade selector electric motor system very neat compact took ninth place leamed later uncle Dick Son heim well-known present-day AMA lead er RC system never published probably because Phil turned skills secret war work shortly after Nats Im told died during war under rather mysterious circumstances pursuing work States Goods second time brother Bill able team Nats felt Guff better shape beforeand pilots hundred flights stick practice Some public demonstrations several meets Illinois Michigan Ohio Canada What surprise Bill found waiting us after first night Sherman Hotel After breakfast Wednesday morning went car hotel lot found hole Guff wing stored just beneath car ceiling dad said binoculars gone Bill said Wheres transmitter gone too After few hours discussion hotel management local police became clear recovery stolen items extremely unlikely What next question RC event scheduled next morning Thursday Bill said Walt fix wing Ill build transmitter Thats what happened Bill went Newark Radio Store State Street explained problem manager said lots parts would night inventoryand workbench back room oouldnt believe Bill never worked fast home morning came forth two radio tubes 4-ftsq piece plywood along bunch coils parts reminded overnight transmitter should touched because 400 volts exposed everywhere almost forgot temporary control box Ken Davis rigged up 400 volts too survived somehow way RC site 79th Keeler stopped open field make quick distance test OK after some tuning site word spread about stolen transmitter several fliers offered use Joe Raspante guy beaten out first Save old Timer Podp5jtiqUO si6~ GbaflW0From this.k sped rtmers potfltS Ian9 Mode Engine Parts Only Over 600 items Send *200 current catalog pAN AR 05pA C 200/o Greater Heat Resistance Impervious Exhaust Products Eliminate Burned Up & Blown Out Silicone SEND 4 SOperS/8 D Coupler or500per3/4 ID DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54580 May1986 171 III PROP ASSEMBLY #1 09-ELECTRIC ONLY PROP HUB ASSEMBLY #IOOA 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #100A Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair POOP HUB ASSEMBLY # 110 051 engines electric motor equivalent WeightS grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP 1101 ASSEMBLY N 111 0 engines electric motor equivalent 20 grams$2000 PROP BLADES FOR HUB N 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line FAI RUBBER Sizes 114 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber mdse add $1 50 UPS Over $lSaddlO% Phone O213 830-8939 H377-1959 P30 HEADQUARTERS Special kit/rubber combos NEW NEW P30 prop $2495 Coupe deVIIIe Finished prop Very very complete Tilka____ Wakefield22Fe shed F Oct End_______ KSB TIMERS Fuel Shutoff 3Osec-$1195 BminDT-$1195 $3895 plus $250 UPS Send $100 1986 Catalog F Model Supply L7 P0 Box 3557 Torrance CA 90610 NEW FROM FOX 15X 15 RC featuring all-new Mark X carburetor 42 9O muffler #21500 Bore590 Stroke . 540 Weight 45 oz RPM 7-5 prop14000 muifler installed RPM 8-4 prop 13000 muffler installed lightest weight lowest cost 15 can buy now boasts all-new Marki carburetor better-than-ever per formance Runs best lO/o nitro fuel little jewel still compact enough light enough fit models designed 09s 10s VISA Mastercard Accepted F0x MFG Co 5305 TOWSON AVE 0RT SMITH AR 72901 5011 646-1656 Easiest Hinge Install Now available scale size PRO HINGEJ use cyanoacrylate adhesives No pinning messy epoxyInstant glues neededSpecial Paper No special hinge slotter needed No alignment necessary stic Special Paper RADIO SOUTH Inc 43 West Nine Mile Rd Pensacola FL 32414 904 478-6745 place year before real sports manship Ive always very warm feeling Joe ever since cant say same Sherman Hotel meet decided fly rudder though overnight trans mitter two channels before did use elevator newly-installed throttle control Actually Guff carried two separate receivers option rudder/elevator rudder/engine might have earned some extra points Fortunately opportunity make several flights meet almost pulled off secret maneuver inside loop practicing home field using rudder con trol began using full left rudder start left circle spiraled tighter steeper turn during model picked up considerable speed nose pointing down steeply gave opposite rudder just long enough stop turn held neutral nose rotated rapidly vertical position plane stalled fell over its back recovered level flightmaldng pear-shaped loop9 meet engine quit top stall model flopped down going neatly over its back Luckily altitude sufficient glide back within 20 ft spot maxi mum landing points Note final points listed below lower year before time judges required give fewer points poorly-executed maneuvers Further Leo Weiss judges taldng postmans holiday RC target drone job Wright Field P1 Name 1 Walt Bill Good 2 Charles Siegfried 3 Joe Raspante 4 Jim Tom Custin 5 Ben Shereshaw 6 John Ault 7 Phil Sonheim 8 Elmer Wasman 9 Lester Helle 10 Jesse Bieberman 11 Bob Reder Controls R REM REM REM REM R REM R R R R Points 65 49 34 23 19 17 13 12 11 10 6 1941 Nationals event Chicago July 1-6 fifth RC last prior WW II Up time biggest best ever held field 26 RC entries yielded 12 scoring pilots three repeaters nine newoomers eight total 40 flights over three-day period first time extra days allowed tuning preparations poor weather other delays fortunate first two days plagued windy weather Siegfried Ault Reder repeaters names new comers will emerge go Bill attended meet did enter plane highly-inter ested spectators Bill honey moon finishing PhD research thesis Based sensible priorities neither us should have just couldnt miss time newcomer took first place Jim Walker Fireball Control Line fame Portland OR remembered preceding 1940 Nats Jim spent time carefully observing RC event helped Elmer Wasman launch plane Also several 1940 photos showed Jim critically watch ing RC planes judges Rumors Walkers preparations RC model leaked Bill through some letters Ed Rockwood rabid RC experimenter West Coast rumor mentioned new system called proportional control something dreamed about never seen would new exciting true Jim Walker Sure enough entry small 7-ft ship proportional rudder proportional engine speed used two standard RCH receivers relays very clever way engine control simpler two controls used two sets breaker points engines ignition system set high speed other low speed led primary spark coil wire through relay contacts two timer points Signal oft save low sneed save hish sneed RC $249/pkg 18 Scale $449/pkg 24 neat part pulsing channel gave intermediate speed Theres Changing pulsing dwell time pro duced speed between low high medium speed engine emitted distinc tive burping sound jumped between high low speed rudder channel used dwell-time pulsing used small electric motor driving through fluid coupler rudder pulled left side spring oft signal rudder left signal right Dwell-time pulsing gave 50/50 ratio neutral rudder varying pulse ratio gave desired position full left full right truly propor tional rudder following control stick first contest demonstration dual-proportional system using two independent radio channels model plane Furthermore Jim squeezed equipment small time 7-ft plane weighed 5 lb fully loaded did first taxi maneuvers ever seen proportional systemeven bumpy dirt road tricycle landing gear helped accomplishment Walker awarded 88 points out possible 100 air maneuvers spot landings taxiing clear Walkers last flight carried smoke bomb simulate skywriting skillful competitor RC competitors later Arthur Earle Close behind Walker next plane earned 83 points second place five-point gap differ ence between assisted takeoff 5 points taxi takeoff 10 points Earles 9-ft plane powered Ohlsson 60 used three controls REM original design andget thishis first model plane three controls actuated escapements three sepa rate receivers flying very con sistent spot landings stopped within 54 ft spotexcellent days Earl newcomer knowledge never flew again National Contest Charlie Siegfried using 1940 plane took third place higher score second place year before managed large loop may have first recognizable performed Nationals Ken Harker modem plane brought two electrical engineering stu dents Purdue University attracted great attention its complete complex control system Harker Dick Symonds designed built 14-tube receiver five audio channels rudder ele vator engine controls Selective audio circuits directed command signal desired electric motor control surface No sequence system delays electronic equivalent tuned-reed system used Leo Weiss 1937 ground checkout demonstrated control direction could quickly chosen control surface speed seemed quite slow us since travel time neutral full deflection about four seconds0 12-ft plane sported sleek racertype body 3A-hp Mercury Avia en gine disappointing us flown meet whole system beautifully crafted though Bill didnt bring plane satisfaction seeing two dupli cates 8-ft Guff meetthe first meet two look-alike planes present John Ault flew Guff seven times meet fifth place 50point score called plane Spook gave no explanation why2 now actively retired Arkansas Mike Thomas Pittsburgh RC Contest Director Frank Zaic Harry Copeland judges names other officials couldnt found reference material final standings P1 Name Plaae Equipment Points 1 Jim Walker 7-ft trike gear RM proportional 88 Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blend4 Chnices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balinons FILLER SB SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS r Over 1000 ToolS FREE Catalog I4FROM MicroMark Small Tool Specialists yao asa miniature issla pselt find t~atstaeeting asians ear new MiCNOMANK cafaingl Mann teals hard-ta-find . mann HUGE DISCOUNTS Na mere searctdag frnm stare fanfare New enerynhina pan need clone peer mailbas Save time sane macen Use coupon mend name addresa MICROMARK ass vi 12-201 94 Cant Main 5t Chases NJ sanee I I assneasI tnt _________________________________ snese ______ sip I L1 May1986 173 found talented showman midable opponent Only Way Iy Fabtronics Mark 3 CDI pointless system Works Great Most 2 4 Cycle engines Automatic Spark control now avaitabte moat 4 cycte engines comptene System Batteries non mci69 add $3 poss & HendI FABTRONICS 375 Isle Royal Rd Calesburg IL 61401 2541 NE 11th Court ano Beach Florida 33062 e 305 941-9119 AVAILABLE FROM LEADING DEALERS AND DISTRUBUTORS DIRECT 2 Arthur Earle 9-ft orig REM3esc 83 3 Charles Siegfried 15-ft orig REMselec tor 77 4 Marvin Hemp Miss America RE2esc 73 5 John Ault 8-ft Guff RM2esc 50 6 George Karpovich Custom Cavalier RM 2esc 39 7 HD Edwards 9-ft Cavalier RM2 elect mot 29 8 Bob Reder 8-ft Sailplane Rlesc 13 9 Ken Harker l2-ft orig REMtones 9 10 Clark Hile 8 pts 11 Cecil Winik 6 pts 12 Allen Trinuner 5 pts R er E ator M r account five-year history RC event AMA National Contest makes plain Radio Control arrived time 1941 event small new distinct category model plane family measure rapid buildup near end period number RC flights40 flights 1941 compared total 10 flights previous four years Receivers Technically airborne radio gear still highly experimental extremely fussy Tuning adjusting finicky sets occupied much contest time example receivers 45-volt B battery dropped little volt tuning relay settings redone single-tube receivers both Type 30 vacuum tube RK62 gas tube could coaxed job needed time superregenerative mode opera tion highly resistant spark ignition usually no problem Other types detector modes used three- four-tube sets did fare well extra audio tubes ad versely affected vibration especially powered models Relays Commercial units heavy expensive sensitive vibration mar ginally adequate small plate current changes available receivers Homemade relays fared better tail ored particular receivers use remember brother Bill wrote article 1940 QST magazine giving construction details homemade DG-6 polarized relay received hun dreds requests hams informa tion availability purchasing13 think fact stated built relays 500 350 magnet 150 fine wire grabbed atten tion labor winding half-mile fine wire small form forming metal parts included cost Later Sigma other commercial relays came available Control systems used during period varied may grouped several categories follows 1 Escapements ranging size oz 4 oz seen rapid positive over half models Some used escapement rudder alone others used up three channels giving rudder elevator mo tor REM Escapements would prove around years come would appear various clever arrangements 2 Sequential selector systems worked like dial telephone used Siegfried Wasman Sonheim others group pulses received selector would connect power specific control surface electric motor would move surface desired direction gave multiple controls single channel slow operated control surface timeprobably better slow boat fast airplane 3 Non-sequential selectors such Weiss 1937 tuned reeds would become very popular 195 Os time delay selecting control fraction second Harkers electronic tone selec tion system similar result Both planes ahead time such ambitious projects enormity complexity efforts involved caught unproven contest time 4 Walkers proportional pulsing also ahead its time demonstrated superbly its effective control capability DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 83401 314 221-8803 aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40 SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE 174 Model Aviation PRODUCTS FOR THE DISCERNING MODELER DYNATHRUST PROPS look great too! ALL FUTURE PRODUCTION ON ALL SIZES WILL HAVE LOGO AND TIPS PAINTED SIZES CURRENTLY AVAILABLE 13x6 15X6r 8 $700 18x6 8r 10 0 22x8 10 0 14x6 16X6 8 $800 20X6r 810 0 AddlSizesAvailobleSoonf .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74r3pak$495 4Q4r INTERCEPTOR Folding Wing Gilder U-Build-It Kit $395 4 Ready Fly $795 Add $3 postage handling first additional P0 Box68132 AIRCRAFT Co Portland OR 97268 Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship PrformanC 020 Inglnes FeeFlighl Rubber Pulse small Multi Channel R/C systems suItable 50 pears ago mas very capable aircraft mell$2195 proportioned stable model flight ao interestingKIT #102 design lending itself balsa strontaral techeiqoes Wev aol e wrale line 01 rear tavorites please send 505 tnt Flyline Cetalco prone 17031 273-0503 Sea ens ano Oistibators neited FLYLINE MODELS INC PO Box 2136 Fairfax VIrginia 22031 Transmitters easiest part RC systems since unusual limits weight size Power outputs five 40 watts normal almost used 5 6-60 MHz ham band Thanks ARRL pio neering hams having frequencies basic equipment available right time course would have better simpler radio licenses available need would solved after WW II AMA FCC developed no-exam RC license lessons learned pre WW II years five AMA National Contest RC competitionsand viable RC systems developed pioneers less-successful pioneers showed us directions followthereby help ing others avoid Undoubtedly RC development would have progressed much slowly stimulation provided contests Thanks AMA supporting organizations indi viduals made RC meets possible include Detroit Exchange Club Polks Steve Corbetts Chicago Parks Frank Nekimkens many others period next AMA Nats RC meet would take place until after end WVT II 1946in Wichita KS follow ing decades would see giant leap growth rate AMA membership num bers due primarily bursting popu larity RC competition event period still another storyor group stories Acknowledgements Thanks wife Joyce brother Bill son Terry supportand others helped research series References DeSoto Clinton B QST October 1938 Air Trails May 1939 2Grant CH ModelAirplane News September 1938 3Good Walter Air Trails January 1939 4Good William QST March 1940 Zaic Frank Walter Farynk National Model Airplane Meet Pictures 1939 6Bohnenblust CE QST August 1940 7Custin James R Model Airplane News Au gust September 1947 Custin J T Inverview September 18 1985 9Good Walter Win Air Trails November December 1940 January 1941 0DeSoto Clinton B QST September 1941 little device sounds steady beep guide right plane Easily mounts smallest planes Use connector plug receiver same servo Also tells someone frequency solid state crystal oscillator Comes ready mount full structions included WT 1 oz DIM 1 x2 3/8 x 3/4 MADE IN USA CLUB DISCOUNTS AVAILABLE * ASK * F3H IntI/JoIIy Continued page 86 Rudnick two complete 21km course managed come home minute faster Rud nick Official flying began Monday Decem ber 9 would like travel way around world contest have SEND CHECK OR MONEY ORDER TO ELECTRONIC DESIGNS INC BOX Z 1925 GREENWOOD LK TPK HEWITT NEW JERSEY 07421 PHONE 201 7281616 Plus $200 Shipping cont USA NJ Residents add 6% Sales Tax COD add $200 Allow 2 wks Shipping May1986 175 lightweight package Later other mechanDavis Al ModelAirplane News Septemlr isms single dual proportional sys 1941 tems would become popularKulick Harold Model Airplane News Oc 5 earlier slow-cycling systems used tober 1941 1937 planes Lanzo Good didnotGood William bc cit reappear after first year indicating other methods considered effec tive 1EEV ONLY
Edition: Model Aviation - 1986/05
Page Numbers: 76, 77, 78, 79, 80, 81, 82, 171, 172, 173, 174, 175
THE 1937 NATIONAL CONTEST re vealed preceding installment beginning steps RC model plane development blend two different hobbies gas-powered model planes amateur radio modeler needed produce stable controllable plane could easily carry radio gear radioman needed produce airborne radio gear tolerate environment vibration ignition noiseand hard land ings Only few individuals possessed both skills early efforts utilized least two persons stories next four Nats starting 1938 will highlight advancements happened just six entries 1937 number climbed 26 1941 year some old hands would reappear 1938 RC successes burst forth especially final prewar meet 1941 1938 Nationals second AMA Nats RC event Detroit July 9 1938 five entries Two veterans 1937 event Pat Sweeney Walt Good Chet Lanzo 1937 winner did enter time Elmer Wasman spectated due receiver problems Leo Weiss B Schiffman didnt show three new comers Clinton DeSoto Howard Flanigan Mike Roll DeS oto giant 25-lb Cub 14-ft span twin Forster engine two controls rudder elevator required four separate receivers using new RK62 three-part series concluded issue author has taken us first RC event atthe 1936 National Con test year AMA founded 50 years ago final prewar Nats 1941 Offering RC first time may have pure optimism no entrants RC established itself forever dynamic modeling class just five years later Part 3 alt Good Histryot RC Flying newcomers would arrive bolster ranks No person actually entered five prewar Nats RC events Although Wasman Good attended five officially flew four However enough repeaters present meet develop camaraderie among pioneers closeness still remains today 50 years later meet well review top fliers equipmentand observe de velopment trends toward success Fi nally well witness moments Raytheon gas tube one-tube superregen circuit Sigma relay Four transmitters four separate frequencies 56-60 MHz used operate receivers give left/right up/down flight control no signal control surfaces remained last positions No provision made automatic return neutral positions hind sight tells us non-neutral-return system may have difficult fly early stage RC Two reversible motors operated rud der independently simultaneously desired Everyone anxious see behemoth fly Total radio payload 4 lb Before Nats total flight weight 28 lb 10-in-dia wheels steel landing gear lightened bring weight just under RC event limit 25 lb maximum1 very disappointed giant Cub wasnt flown day Ive learned whether Cub ever flown 76 Model Aviation Left WaltGood RC Guff new bodyforthe 1938 Nats LesterGood Pop left ham operator Kreiiick right Right Aithough external damage plane mild lnternai damage receivers appeared awesome repaired used again Goods radio equipment 1938 Ciockwise right receiverwith Type 30 tube sensI tive relay escapement Au homemade picture taken Kalamazoo Airport few weeks afterthe 1938 Nats crash shows Walt amiiing No wonder Guff re built Rxsee side window fiying again 1938 Left DeSoto Cub second 1938 Nats sits Wayne County Airport hangar Wing 25-lb model can seen back ground Center Four RK-82 receivers controlled Cubs rudder elevator Right Cub fuselage outside hangar Its biggie Goods Big Guff new fuselage big radio compartment 12 x 15 x 6 allow easy access airborne gear relays actuators changed 1937 rig Homemade polarized relays lightweight balanced armatures resistant engine vibration would operate reliably current change iampere actuators changed homemade four-spoke escape ments mounted directly fin hori zontal stabilizer allowing very short direct mechanical connection control surfaces 1-az escapement posi tive positions very fasta few tenths second position old cycling actuator took over 3 sec lacked positive home positions Both rudder elevator op erable However rudder ac tually connected 1938 meet Howard Flanigans plane 8-ft span two large four-spoke escapements cabin rudder elevator control used two RK62 receivers 56 60 MHz Brown Jr power Pat Sweeney brought new plane Custom Cavalier well-established design Free Flight Gas arena believed used some 1937 gearwith rubberband-driven escapement rudder control Mike Roll ancient photo album see RC plane streamlined shoulder-wing type similar Cavalier used rudder control Strangely much detail written about equipment early RC models partly because re porters werent very knowledgeable about RC partly because RC event re ports brief order share space other events Nats Radio Control event Satur day July 9 windiest day Nats pioneers liked RC didnt like much wind Good ship chalked up about 30 flights since last Nats gained confidence new controls decided give try keep account 1939 flight accurate unbiased turn description Charlie Grant editor Model Airplane News2 Toward end Saturday afternoon after diligent work during entire day Walter Good radio-controlled mod el prepared flight demonstrated efficiency radio mechanism ground worked perfectly great praise due young man unique efficient mechanism em ployed Paul Kreilick radio operator shares honor mechanism complete efficient has exhibited Finally undertook fly ship though wind blowing about 20 miles per hour very gusty difficult because novelty type ship keep spectators rushing May1986 77 Left Howard Flanigan hat hIs 8-ft cabin plane two controls placed third 1938 Right Flanigans setup used two Sigma relays top two escapements bottom fastened wooden bulkhead fitted Inside cabin Left Bill Good holds Guff fuselage next new 20-watt transmitter storage bat tery 400-volt genemotor Thats portable believe new fin/rudder also added 1939 Center homemade escapement used Guff fin stab rudder elevator control also new 1939 RIght Cutaway view rud der escapement mounted Guff fin Escapement sketched oversize show details 1939 group endeavoring prepare models flight However finally model taken field motor started took off Unfortunately grass quite long some caught elevator flap deflected takeoff model immediately went stall recovered However seoond stall after zoom turned over its back made complete loop meantime Walter endeavor ing 100-yard dash back operating mechanism means hoped remedy disastrous condi tions flight Unfortunately though bottom loop model hit ground just before nosed up before Walter oould oontrol ship ship complete washout radio apparatus inside ship looked someone stirred around concrete mixer tail part mechanism damaged nose pushed spite damage hours work gone model Walter still smile commend him highly must admit smile partly fake because kicking myself being near transmitter end launch carefully instructed radio helper Paul Kreiick W8QQE hold control box oould grasp easily after galloped back launchand cautioned him move switch because never flown plane before touch rudder would have corrected stall placing Guff circling 1940 Left Biebermans transmitterwith V antenna sits top car atthe 1939 Nats Right Biebermans one-tube receiver seen through transparent panei fuseiage 78 Model Aviation Left Joe Raspanti ground-tests Super Buccaneer second 1939 Nats Note tripod-mounted controi box Center controi box used teiephone dial Rudder engine controls dialed Right four-tube receiver sensitive relay inside cabin Left Phil Sonheim fourth 1939 helper shown holding receiver package plane uncle present-dayAMA leader Dick Sonheim Right Elmer Wasman makes always-required adjustments entry just before placing third Wasmans fuselage carried RK-62 tube receiver escapement rudder didnt make successful 1939 Nats flight Irwin Leshners RC entry 1939 Nats 1940 flight dont really believe long grass deflected takeoff Grant suggested Since wing-tip-assisted launch finally released shoulder Left Phil Sonheim 9-ft 3-ch piano Right close-up homemade selector device Note use bulkheads compartments separate heavy equipment Left Wasman launches model wing tlpfrom plywood runway Model hitthe background weeds Jim Walker sits foreground Right Bob Rederand radioman pylon modelrudder-only controls May1986 79 Left Bill Good built two-channel transmitter overnight local electronics store won meet next day Center Bill Wait prepare RC Guff flight fitted rudder elevator engine control rudderwas used 1940 Nats Right Bill tuning receiver meter priorto flighta standard necessary procedure early days Photo byAl Daraghy IegTrIeaspIanewItn -orsieranaseIec tor telephone exchange behind windows Left Custin brothers Tom Jim fourth 1940 Nats 8-ft model Right Tom Custin holds 3-lb RC receiver controlsall removable unit Lull uruuruuw IUUU 1anwith Cecil Winik helping Right JohnAultandeniargedRCBuccaneerBth RC-1 wuih covers removed 5uuwu three motorizeu udpemOnts two ono-tube receivers 1941 Jim Walkers 1941 Nate winnerwith just 7-ft span pulse proportional control rud der engine speed featured trike landing gear powered Brown Jr Left Winnie Davis launches Siggys 1 4-lb RC plane Right Siegfrieds 50-watt transmitter can seen sitting cartrunk control console ground tall 1 4-footerln background Plane foreground backup Siegfried went finish third place height effect grass reduced Normally Guff would climb slowly launch stable Free Flight model first control command could delayed several minutes desired can sure learned lesson about launching wind important flight Later launching such wirrd handled quite easily same model long pilot controls start brother Bill controls instead Great Lakes ship radio operator would have flicked bit rudder before first stall Grant says further 20-mile wind crackup initial flight dis couraged other radio event contestants . evident experiences men least three four days should spent assembling testing before preparation flight days time proved insufficient prime cause lack successful flights radio models gusty weather clinched matter far flights concerned agreed statement would three years before time margin added meet schedule fact 1941 Nats would first set aside three days RC final standings 1938 Nats based ground demonstrations attemp ted flight follows 1 Walt Good Kalamazoo MI 2 Clinton DeSoto Granby CT 3 Howard Flanigan Detroit MI 4 Pat Sweeney Chicago IL 5 Michael Roll Dearborn MI though Guff given first place very satisfying win Thus end second Nats with much RC interest still no convincing demonstration actual maneuvers radio-controlled model plane3 1939 Nationals contrast 1938 Nats five RC entries 1939 Nats 16 11 actually showed up Wayne County Airport Detroit time RC event showed promise some real action Four 11 repeaters 1937 1938 Flanigan Gcod Lan zo Wasman newcomers Bieberman Leshner Mende Raspante Rose Siegfried Sonheim year judges would using point system first time ground points given workmanship control operation before actual flight flight points given several different maneuvers such cross-country return circles left right Figure8 others perfect score would net 100 points Left Earles 9-ft original REM three receivers Right Earle holdethe plane friend works control box table Transmitter located cars trunk pilots meeting judges decided would call out maneuver advance fast-talking pilot wouldnt get away describing what plane just donerather what sup posed contestant suggested model four vacuum tubes receiver should receive points receiver just tube course one-tube fliers objected judges ruled performance principal factor number parts Thank goodness models basic rudder control few also elevator control used new single RK62 gas-tube receiver Sigma relay escapement actuators trend rudder-only beginning emerge Goods weather perfect cumulus clouds very light breeze better brother Bill present first RC Nats having missed two before Gulf new fin rudder replace ments account 1938 Nats flight damage new lighter 05-oz escape ments two receivers rebuilt ver sions same Type 30 tube batteries anchored floor body instead being part receiver/relay package 1938 crash batteries integral receiver package proved decisively pound loose batteries could very destructive Lesson learned mount 80 Model Aviation Hemps Miss America RC fuselage Power Barker engine model placed fourth batteries separately 60 flights Guff several public demonstrations through out southern Michigan during 1938 high hopes might year true RC demonstration Bill pilot always took turns launched Guff running wing tip First judges called left circle followed right circle plane did both came cross-country return request plane climbed light breeze almost two minutes before judges said half-mile paint reached Bill steered 34-circle left followed -circle right headed back toward transmitter Guff soon arrived overhead com plete returnat point well over 1000 feet altitude Guff being turned back wind Figure-8 requested large left circle followed equal-sized right circle form 8 went smoothly Next Bill chose spiral dive stall optional stunt maneuver also went well home practicing spiral dive loop using just rudder control bit unreliable agreed use should mentioned though Guff both rudder elevator controls decided use rud derwith experi ence elevator receiver switched off elevator escapement pinned neutral required air maneuvers completed plane cruising 1500 feet thermal engine stopped 6 min normal 1941 next few minutes Bill repeated several maneuvers try better point score dont remember whether ploy helped control during glide worked well still altitude burn moment district radio inspec tor earlier checked ham licenses witnessing flight asked might have try stick keeping eyes plane Bill calmly asked him ham license reply No Sorry said Bill Fliers other events field collected around transmitter land ing area after word spread radio job air judges trying tell Bill make turns approach butt tell judge last task spot landing Bills job make turns saw fit get close possible Bill using steering technique keeping final turn before landing banked long possible giving quick opposite rudder level wings followedby neutral plane would float smooth landing did less 100 feet judges points awarded 89 out possible 1O0 What nice day flight Zak s 1939 Nats Book said under control9 Sure wasp moment took off until glided back its master worth coming Nationals just see historic per forniance5 Joe Raspante 11-ft Super Buc caneer set up flight Sal Taibi person ever saw could hand-launch giant plane over headnot wing tip Joes plane four-tube receiver rudder control beautifully crafted powered Forster 99 control box used telephone dial five com mands up/down right/left stop engine Since photos plane show no elevator flap believe rudder engine active controls used year flight lasted almost four minutes gathered total 11 points second RC flight made 1939 Nationals account states radio interference stopped engine prematurely Elmer Wasman short flight meet third place told later best RC demonstration took place dedication new airport southern Georgia shortly after Nats According notes total six pilots attempted flights day list below shows placed P1 Name Hometown Age Points 1 Walt Bill Good Kalamazoo MI 23 89 2 Joe Raspante Brooklyn NY 29 11 3 Elmer Wasman Jacksonville FL 30 9 4 Phillip Sonheim Niellsville WI 27 8 5 Charles Siegfried Wichita KS 42 8 6 Robert Mende Flint MI 22 8 7 Erwin Leshner Philadelphia PA 20 6 8 Jesse Bieberman Philadelphia PA 34 6 9 Howard Flanigan Detroit MI 54 1 10 Chester Lanzo Cleveland OH 25 1 11 Robert Rose Highland Park MI 190 1940 NatIonals entries actual flights surprises encountered event held Chicago time 11 planes appeared 16 entries least seven made scored flights Six entries May1986 81 Ault helmet RC Guff-type plane escapement control fifth George Karpovich adjusts Custom Cava lier featuring two-escapement control Clin ton DeSoto helps transmitter controls Left Ken Harker behind Purdue UniversItys 1 21/2ft entry Model demonstrated ground flown Center Harker transmitter used tone control three-channel operation Right 1 0-tube receiver electronic tone selectIon used Harker plane repeaters five newcomers Charlie SiegfrIed Siggy Wichita largest plane 15-ft span 1 3-lb weight Forster 99 power dubbed telephone exchange because its control system rudder elevator engine basically dial telephone simi lar Raspantes system dialing given set pulses airborne selector switch would energize desired electric motor give say left rudder signal turned off rudder would return neutral similar action operated ele vator different number pulses Engine control however remained throttle position set having no automatic neutral return feature airborne collection electronics motors gears selector batteries weighed 3 lb described CE Bohnenblust Charlies radioman QST magazine carried cover photo Charlies plane6 control box size small suitcase complete neck strap made him lcok like street vendor central stick controlled rudder elevator through mechanical pulse generator details revealed long cable box led trunk Siggys car 50-watt transmitter housed typical flight Siggy would start Forster 99 hoist giant plane onto Winnie Davis shoulder quickly don control box check systemalways talking steady stream Winnie would run full speed heave plane air show repeated times meets Siggy became special characters RC circuit can still remember flights plane went dutifully through required maneuvers drifting down wind whole time finally disappearing behind trees outside airfield Spot landings thing controls did work time Siggy eamed second place closest top ever reached proud Joe Raspaate followed Siggy third place very respectable flight Super Buccaneer Jim Tom Custia Wisconsin tcok fourth place original 8-ft cabin plane weighed about 10 lb Power twin-cylinder engine built friend Ed Schunke Earlier tried Forster 99 didnt have enough power suit Tom built radio system control rudder engine7 two control channels gave variable positions based clever sequenced-selector-pulse systemalmost proportional control receiver used RK62 tube home made polarized relay servos Pittman permanent magnet motors using Continued page 171 82 Model Aviation TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals A/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED RC History/Good Continued page 82 lead-screw speed reduction transmit ter control box called wheatfield because dozen clattering relays generate pulses Hmmmdigital con trol Jim being older assumed posi tion pilot made several RC flights just before Chicago Nats Im allowed mention ended treesomething about missed pulse Toms system However day Nats Jim report summer job Lake Michigan ship Tom became pilot official flight Tom says plane got air OK made two maneuvers before ship turned wrong way went ground8 good enough fourth place Tom recently retired General Elec tric Syracuse Jim thinking about retiring job patent lawyer Milwaukee Ben Shereshaw Several planes threefunction controls rudder elevator motor REM unusual Shereshaws twin-boom pusher called RC-1 Cecil Winick Radio Control Headquarters RCH attended ad justments RCH receivers motorized escapements What pretty plane Fifth place John Ault enlarged Buccaneer awarded sixth place using escape ment rudder control Phil Sonheim another REM ship 9-ft mid-winger housed completely homemade selector electric motor system very neat compact took ninth place leamed later uncle Dick Son heim well-known present-day AMA lead er RC system never published probably because Phil turned skills secret war work shortly after Nats Im told died during war under rather mysterious circumstances pursuing work States Goods second time brother Bill able team Nats felt Guff better shape beforeand pilots hundred flights stick practice Some public demonstrations several meets Illinois Michigan Ohio Canada What surprise Bill found waiting us after first night Sherman Hotel After breakfast Wednesday morning went car hotel lot found hole Guff wing stored just beneath car ceiling dad said binoculars gone Bill said Wheres transmitter gone too After few hours discussion hotel management local police became clear recovery stolen items extremely unlikely What next question RC event scheduled next morning Thursday Bill said Walt fix wing Ill build transmitter Thats what happened Bill went Newark Radio Store State Street explained problem manager said lots parts would night inventoryand workbench back room oouldnt believe Bill never worked fast home morning came forth two radio tubes 4-ftsq piece plywood along bunch coils parts reminded overnight transmitter should touched because 400 volts exposed everywhere almost forgot temporary control box Ken Davis rigged up 400 volts too survived somehow way RC site 79th Keeler stopped open field make quick distance test OK after some tuning site word spread about stolen transmitter several fliers offered use Joe Raspante guy beaten out first Save old Timer Podp5jtiqUO si6~ GbaflW0From this.k sped rtmers potfltS Ian9 Mode Engine Parts Only Over 600 items Send *200 current catalog pAN AR 05pA C 200/o Greater Heat Resistance Impervious Exhaust Products Eliminate Burned Up & Blown Out Silicone SEND 4 SOperS/8 D Coupler or500per3/4 ID DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54580 May1986 171 III PROP ASSEMBLY #1 09-ELECTRIC ONLY PROP HUB ASSEMBLY #IOOA 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #100A Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair POOP HUB ASSEMBLY # 110 051 engines electric motor equivalent WeightS grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP 1101 ASSEMBLY N 111 0 engines electric motor equivalent 20 grams$2000 PROP BLADES FOR HUB N 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line FAI RUBBER Sizes 114 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber mdse add $1 50 UPS Over $lSaddlO% Phone O213 830-8939 H377-1959 P30 HEADQUARTERS Special kit/rubber combos NEW NEW P30 prop $2495 Coupe deVIIIe Finished prop Very very complete Tilka____ Wakefield22Fe shed F Oct End_______ KSB TIMERS Fuel Shutoff 3Osec-$1195 BminDT-$1195 $3895 plus $250 UPS Send $100 1986 Catalog F Model Supply L7 P0 Box 3557 Torrance CA 90610 NEW FROM FOX 15X 15 RC featuring all-new Mark X carburetor 42 9O muffler #21500 Bore590 Stroke . 540 Weight 45 oz RPM 7-5 prop14000 muifler installed RPM 8-4 prop 13000 muffler installed lightest weight lowest cost 15 can buy now boasts all-new Marki carburetor better-than-ever per formance Runs best lO/o nitro fuel little jewel still compact enough light enough fit models designed 09s 10s VISA Mastercard Accepted F0x MFG Co 5305 TOWSON AVE 0RT SMITH AR 72901 5011 646-1656 Easiest Hinge Install Now available scale size PRO HINGEJ use cyanoacrylate adhesives No pinning messy epoxyInstant glues neededSpecial Paper No special hinge slotter needed No alignment necessary stic Special Paper RADIO SOUTH Inc 43 West Nine Mile Rd Pensacola FL 32414 904 478-6745 place year before real sports manship Ive always very warm feeling Joe ever since cant say same Sherman Hotel meet decided fly rudder though overnight trans mitter two channels before did use elevator newly-installed throttle control Actually Guff carried two separate receivers option rudder/elevator rudder/engine might have earned some extra points Fortunately opportunity make several flights meet almost pulled off secret maneuver inside loop practicing home field using rudder con trol began using full left rudder start left circle spiraled tighter steeper turn during model picked up considerable speed nose pointing down steeply gave opposite rudder just long enough stop turn held neutral nose rotated rapidly vertical position plane stalled fell over its back recovered level flightmaldng pear-shaped loop9 meet engine quit top stall model flopped down going neatly over its back Luckily altitude sufficient glide back within 20 ft spot maxi mum landing points Note final points listed below lower year before time judges required give fewer points poorly-executed maneuvers Further Leo Weiss judges taldng postmans holiday RC target drone job Wright Field P1 Name 1 Walt Bill Good 2 Charles Siegfried 3 Joe Raspante 4 Jim Tom Custin 5 Ben Shereshaw 6 John Ault 7 Phil Sonheim 8 Elmer Wasman 9 Lester Helle 10 Jesse Bieberman 11 Bob Reder Controls R REM REM REM REM R REM R R R R Points 65 49 34 23 19 17 13 12 11 10 6 1941 Nationals event Chicago July 1-6 fifth RC last prior WW II Up time biggest best ever held field 26 RC entries yielded 12 scoring pilots three repeaters nine newoomers eight total 40 flights over three-day period first time extra days allowed tuning preparations poor weather other delays fortunate first two days plagued windy weather Siegfried Ault Reder repeaters names new comers will emerge go Bill attended meet did enter plane highly-inter ested spectators Bill honey moon finishing PhD research thesis Based sensible priorities neither us should have just couldnt miss time newcomer took first place Jim Walker Fireball Control Line fame Portland OR remembered preceding 1940 Nats Jim spent time carefully observing RC event helped Elmer Wasman launch plane Also several 1940 photos showed Jim critically watch ing RC planes judges Rumors Walkers preparations RC model leaked Bill through some letters Ed Rockwood rabid RC experimenter West Coast rumor mentioned new system called proportional control something dreamed about never seen would new exciting true Jim Walker Sure enough entry small 7-ft ship proportional rudder proportional engine speed used two standard RCH receivers relays very clever way engine control simpler two controls used two sets breaker points engines ignition system set high speed other low speed led primary spark coil wire through relay contacts two timer points Signal oft save low sneed save hish sneed RC $249/pkg 18 Scale $449/pkg 24 neat part pulsing channel gave intermediate speed Theres Changing pulsing dwell time pro duced speed between low high medium speed engine emitted distinc tive burping sound jumped between high low speed rudder channel used dwell-time pulsing used small electric motor driving through fluid coupler rudder pulled left side spring oft signal rudder left signal right Dwell-time pulsing gave 50/50 ratio neutral rudder varying pulse ratio gave desired position full left full right truly propor tional rudder following control stick first contest demonstration dual-proportional system using two independent radio channels model plane Furthermore Jim squeezed equipment small time 7-ft plane weighed 5 lb fully loaded did first taxi maneuvers ever seen proportional systemeven bumpy dirt road tricycle landing gear helped accomplishment Walker awarded 88 points out possible 100 air maneuvers spot landings taxiing clear Walkers last flight carried smoke bomb simulate skywriting skillful competitor RC competitors later Arthur Earle Close behind Walker next plane earned 83 points second place five-point gap differ ence between assisted takeoff 5 points taxi takeoff 10 points Earles 9-ft plane powered Ohlsson 60 used three controls REM original design andget thishis first model plane three controls actuated escapements three sepa rate receivers flying very con sistent spot landings stopped within 54 ft spotexcellent days Earl newcomer knowledge never flew again National Contest Charlie Siegfried using 1940 plane took third place higher score second place year before managed large loop may have first recognizable performed Nationals Ken Harker modem plane brought two electrical engineering stu dents Purdue University attracted great attention its complete complex control system Harker Dick Symonds designed built 14-tube receiver five audio channels rudder ele vator engine controls Selective audio circuits directed command signal desired electric motor control surface No sequence system delays electronic equivalent tuned-reed system used Leo Weiss 1937 ground checkout demonstrated control direction could quickly chosen control surface speed seemed quite slow us since travel time neutral full deflection about four seconds0 12-ft plane sported sleek racertype body 3A-hp Mercury Avia en gine disappointing us flown meet whole system beautifully crafted though Bill didnt bring plane satisfaction seeing two dupli cates 8-ft Guff meetthe first meet two look-alike planes present John Ault flew Guff seven times meet fifth place 50point score called plane Spook gave no explanation why2 now actively retired Arkansas Mike Thomas Pittsburgh RC Contest Director Frank Zaic Harry Copeland judges names other officials couldnt found reference material final standings P1 Name Plaae Equipment Points 1 Jim Walker 7-ft trike gear RM proportional 88 Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blend4 Chnices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balinons FILLER SB SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS r Over 1000 ToolS FREE Catalog I4FROM MicroMark Small Tool Specialists yao asa miniature issla pselt find t~atstaeeting asians ear new MiCNOMANK cafaingl Mann teals hard-ta-find . mann HUGE DISCOUNTS Na mere searctdag frnm stare fanfare New enerynhina pan need clone peer mailbas Save time sane macen Use coupon mend name addresa MICROMARK ass vi 12-201 94 Cant Main 5t Chases NJ sanee I I assneasI tnt _________________________________ snese ______ sip I L1 May1986 173 found talented showman midable opponent Only Way Iy Fabtronics Mark 3 CDI pointless system Works Great Most 2 4 Cycle engines Automatic Spark control now avaitabte moat 4 cycte engines comptene System Batteries non mci69 add $3 poss & HendI FABTRONICS 375 Isle Royal Rd Calesburg IL 61401 2541 NE 11th Court ano Beach Florida 33062 e 305 941-9119 AVAILABLE FROM LEADING DEALERS AND DISTRUBUTORS DIRECT 2 Arthur Earle 9-ft orig REM3esc 83 3 Charles Siegfried 15-ft orig REMselec tor 77 4 Marvin Hemp Miss America RE2esc 73 5 John Ault 8-ft Guff RM2esc 50 6 George Karpovich Custom Cavalier RM 2esc 39 7 HD Edwards 9-ft Cavalier RM2 elect mot 29 8 Bob Reder 8-ft Sailplane Rlesc 13 9 Ken Harker l2-ft orig REMtones 9 10 Clark Hile 8 pts 11 Cecil Winik 6 pts 12 Allen Trinuner 5 pts R er E ator M r account five-year history RC event AMA National Contest makes plain Radio Control arrived time 1941 event small new distinct category model plane family measure rapid buildup near end period number RC flights40 flights 1941 compared total 10 flights previous four years Receivers Technically airborne radio gear still highly experimental extremely fussy Tuning adjusting finicky sets occupied much contest time example receivers 45-volt B battery dropped little volt tuning relay settings redone single-tube receivers both Type 30 vacuum tube RK62 gas tube could coaxed job needed time superregenerative mode opera tion highly resistant spark ignition usually no problem Other types detector modes used three- four-tube sets did fare well extra audio tubes ad versely affected vibration especially powered models Relays Commercial units heavy expensive sensitive vibration mar ginally adequate small plate current changes available receivers Homemade relays fared better tail ored particular receivers use remember brother Bill wrote article 1940 QST magazine giving construction details homemade DG-6 polarized relay received hun dreds requests hams informa tion availability purchasing13 think fact stated built relays 500 350 magnet 150 fine wire grabbed atten tion labor winding half-mile fine wire small form forming metal parts included cost Later Sigma other commercial relays came available Control systems used during period varied may grouped several categories follows 1 Escapements ranging size oz 4 oz seen rapid positive over half models Some used escapement rudder alone others used up three channels giving rudder elevator mo tor REM Escapements would prove around years come would appear various clever arrangements 2 Sequential selector systems worked like dial telephone used Siegfried Wasman Sonheim others group pulses received selector would connect power specific control surface electric motor would move surface desired direction gave multiple controls single channel slow operated control surface timeprobably better slow boat fast airplane 3 Non-sequential selectors such Weiss 1937 tuned reeds would become very popular 195 Os time delay selecting control fraction second Harkers electronic tone selec tion system similar result Both planes ahead time such ambitious projects enormity complexity efforts involved caught unproven contest time 4 Walkers proportional pulsing also ahead its time demonstrated superbly its effective control capability DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 83401 314 221-8803 aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40 SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE 174 Model Aviation PRODUCTS FOR THE DISCERNING MODELER DYNATHRUST PROPS look great too! ALL FUTURE PRODUCTION ON ALL SIZES WILL HAVE LOGO AND TIPS PAINTED SIZES CURRENTLY AVAILABLE 13x6 15X6r 8 $700 18x6 8r 10 0 22x8 10 0 14x6 16X6 8 $800 20X6r 810 0 AddlSizesAvailobleSoonf .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74r3pak$495 4Q4r INTERCEPTOR Folding Wing Gilder U-Build-It Kit $395 4 Ready Fly $795 Add $3 postage handling first additional P0 Box68132 AIRCRAFT Co Portland OR 97268 Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship PrformanC 020 Inglnes FeeFlighl Rubber Pulse small Multi Channel R/C systems suItable 50 pears ago mas very capable aircraft mell$2195 proportioned stable model flight ao interestingKIT #102 design lending itself balsa strontaral techeiqoes Wev aol e wrale line 01 rear tavorites please send 505 tnt Flyline Cetalco prone 17031 273-0503 Sea ens ano Oistibators neited FLYLINE MODELS INC PO Box 2136 Fairfax VIrginia 22031 Transmitters easiest part RC systems since unusual limits weight size Power outputs five 40 watts normal almost used 5 6-60 MHz ham band Thanks ARRL pio neering hams having frequencies basic equipment available right time course would have better simpler radio licenses available need would solved after WW II AMA FCC developed no-exam RC license lessons learned pre WW II years five AMA National Contest RC competitionsand viable RC systems developed pioneers less-successful pioneers showed us directions followthereby help ing others avoid Undoubtedly RC development would have progressed much slowly stimulation provided contests Thanks AMA supporting organizations indi viduals made RC meets possible include Detroit Exchange Club Polks Steve Corbetts Chicago Parks Frank Nekimkens many others period next AMA Nats RC meet would take place until after end WVT II 1946in Wichita KS follow ing decades would see giant leap growth rate AMA membership num bers due primarily bursting popu larity RC competition event period still another storyor group stories Acknowledgements Thanks wife Joyce brother Bill son Terry supportand others helped research series References DeSoto Clinton B QST October 1938 Air Trails May 1939 2Grant CH ModelAirplane News September 1938 3Good Walter Air Trails January 1939 4Good William QST March 1940 Zaic Frank Walter Farynk National Model Airplane Meet Pictures 1939 6Bohnenblust CE QST August 1940 7Custin James R Model Airplane News Au gust September 1947 Custin J T Inverview September 18 1985 9Good Walter Win Air Trails November December 1940 January 1941 0DeSoto Clinton B QST September 1941 little device sounds steady beep guide right plane Easily mounts smallest planes Use connector plug receiver same servo Also tells someone frequency solid state crystal oscillator Comes ready mount full structions included WT 1 oz DIM 1 x2 3/8 x 3/4 MADE IN USA CLUB DISCOUNTS AVAILABLE * ASK * F3H IntI/JoIIy Continued page 86 Rudnick two complete 21km course managed come home minute faster Rud nick Official flying began Monday Decem ber 9 would like travel way around world contest have SEND CHECK OR MONEY ORDER TO ELECTRONIC DESIGNS INC BOX Z 1925 GREENWOOD LK TPK HEWITT NEW JERSEY 07421 PHONE 201 7281616 Plus $200 Shipping cont USA NJ Residents add 6% Sales Tax COD add $200 Allow 2 wks Shipping May1986 175 lightweight package Later other mechanDavis Al ModelAirplane News Septemlr isms single dual proportional sys 1941 tems would become popularKulick Harold Model Airplane News Oc 5 earlier slow-cycling systems used tober 1941 1937 planes Lanzo Good didnotGood William bc cit reappear after first year indicating other methods considered effec tive 1EEV ONLY