FIVE MINUTES AGO bellyaching temperature bone-chilling snow about superheated summer 1983 falling resolution made Now write shortly after New involuntary stay away epoxy Years Daythe low sky lead gray the past five years Ive increas During 1948 Vince Bentley obtained three amazing photos Ray Arden Vince believes Ray designed after Atom 09 Bill Winter remembers lrv Polk talking about somebodys miniature engines before Atom produced Poiks tiny Free Flight held Arden model would ROG ice front yard lake tiny square hole spinner accepted ratcheted starter Ray spun between forefinger thumb three engines appear different Two ob viously spark ignition note timer ad vance arms Two have underslung tanks different No tank visible the model engine could have glowl No spark-ignition points visible Props turn clockwise appears lami nated small engines paper match much longer inch ing sensitivity whiff produces angry welts itching lasts months did resolve fly year want fly Electric high-per formance fighter-like thing flaps cobalt direct-drive 05and some ultimate efficient thing yet paper will run 13-min-plus perhaps attain total duration 15 1 8 mm thermal assistance using reduction setup huge fold ing fan have five glow-powered slow ships soaring ability shy either radio engine Two Giant Scale jobs roost rafters up Long Island retread guy cant cope such giants guys will buy van Ill reconsider Ever hang 10-ft monsters shop have battered Kadet fun Eaglet will have Enya 40 fourcycle Eagle springwith flaps big Krackerjac spoilers study procrastinated maintenance Theres Midwest Sniffer Astro 035 elec tric motor get too confused will fly nearby school yard until sort things out What else Oh yes Farman 400 Scale project shared Bill Kaluf Its tail-dragger no-dihedral can tilever wing huge flaps OS 40 four-cycle have rubber-powered Lincoln monoplane mind Rub ber power isnt peculiar Flying Models magazine sold over 800 plans year Srulls Shinden canard Only rare RC ships surpass Theres rud der-only throttle 22-year-old make-beheve Airknocker repub lished April Flying Models first printed 1963 Its wheels almost shapeless blobs pocked rubber treads long gone engine Enya lapped 09 also over 20 years old high-tech engines bite dust soon have Wankel engine havent yet figured out what rack mysterious wings tells have other ships hidden somewhere should trash can see dont want face up writing Too much talk about ship have 10 stories tell cat asleep foot-high mound photos Im asleep top Hermes just told editor de mand entire magazine remminds bad would nothing write about Four-cycle engines lost flying sites U jUSt fun Bill Winter U preoccupy Three years ago mesmerized first four-cycle heard run Andrews Aeromaster 05 60 yielded kind per formance old-timers dreamed about since someone named Feeney produced four-cycle briefly during war never saw Now fourcycles everywhere Oddly exception AMA PR Departments Doug Pratt four-cycles few far between huge local club Doug kid behind ice cream counter whomping out everything gliders Coverite Gee Bees scads kits gaggles RTFs Electrics now Giant Scale drag Pratt along nearby sites sits folding chair flies back forth extreme distances usually about 45 mm After such ses sion found antenna Adcom receiver unwrapped identify two planes son Mike started RC began hA-powered Gentle Lady Top Flite Metrick latter slip pery got him try Air Scout Concept Models OS 15 1 liked enough urge Doug try Ace RC acquired Owen Kampen design reengineered simplicity Lite Ply sides Dougs moves out Saito 30 four-cycle turning big prop Mean Mike transferred after framing G-S Stinson design Bob Smurthwaite Pratt powered Saito 40 four-cycle Years ago G-S Stinson won RCMs Best Scale Year award Its too big has scale ribs etc seemingly quite heavy seen pictures Smurthwaites Stinson Howard flying floats nagging doubts use flaps properly ailerons slightly reflexed joy Doug has RAM lights includ ing strobe rudder tip running lights bright landing lights Touch5~OVTU~Z .kn&IQtIi~ CILsCCQLi15SULN CM T Sru_________ 1I$SVE2 CtEO FUSLGE0 IO0 UMR KlACk OPLANDS RTP MODEL 0 0M4 PROPOLLER_______________ RJLQR9O'LII L.2Li LENGTh 176 TOTAL WFIrwT top drawing 1946 issue British magazine Model Aircraft since discontinued Vince Bentleys Round-the-Pole speedster RTP flying craze England years capable 222 5 OL rubber two loops geared 11 geared prop 21 Noted Wakefielder Bob Copland quickly boosted RTP mark 4-plus mm illustrated model having microfilm covering single-wheel gear Drawings both models appeared same issue Coplands 10-in prop almost half 21%-in span Model weighed 5/8 oz Broken line outlining wing shows larger version broke 4% mm Flown 6-ft lines and-goes lights quite fly experience normally too dark Kaluf modernized RC Spe Winter thinks four-cycle engines real Silent Revolution hes intrigued sight Doug Pratt seated folding chair flying two ships back forth 45 mm long-legged flights planes interesting left G-S Stinson Saito 40 flaps work flawlessly picture-book landings rather high loading also has RAM strobe tail light tip lights landing lights glow brilliantly dusk other plane Air Scout designed Owen Kampen Concept Madels now kitted Ace Its Saito 30 heavy plane chugs along like lightplane cross countrytached 800850 rpm idle 8-6 Master Airacrew May1984 19 Taken Radiaplane plant 1943 Reginald Denny stands second right interna tional movie star Denny active aviation modeling Radioplane produced some 13000 early drones target practice ancestors todays sophisticated RPVs Denny remembered Dervnymite engine famous kit Dennyplane realistic fine-flying cabin plane revived Doc Mathews January 1977 MA Plan No 169 photo Warren Anderson AMA 1083 also license number NAA before AMA began Saito 30 Hobby Lobbys Klemm can landed tick-tick idle Dougs Saito 30 idles low 860 rpmOK dont believe 0S 40 four-cycle Farman four-cycles vastly underrated cial using 2 deg dihedral longer nose flaps ailerons chose 05 40 four-cycle turns 13-5 superb flier Kalufs redesigned RC Special will two-parter Aus tralian Airborne magazine also has 25/8djhedrol R/O 7/8for ailerons0 optional wing geometry K K__ LI [J L4 flop deflection ASTRO SPOOK Designed BILL WINTER WING SPANS 45 l/2 WING AREA 356 SO INS POWERASTRO FLIGHT 05 COBALT DIRECT PROP 7D X 4P fIap piece 0 0 Li Winters experimental low-winger direct-drive cobalt electric motor features ailerons/ elevator/shut-offand center-section flaps battery radiator tunnel low center gravity good cooling Theres much about design characteristics text turn big props large disk areas have great thrust burn fuel 50% less normal rate Since four-cycles quiet may answer noise problem Muffled Schnuerles have improved horrendous situation goes back years understand noise sound frequency annoys peopletheres nothing irritating whining Ive involved ongoing battle between people roughtly mile flying site guys fly park use strict muffler rules stern practices guys measure sound officials observing sound has measured area com plaints level lowerusing noisiest engine divethan passing truck several blocks away car start ing up three driveways equip ment park officials agreed complaints groundless 35 people signed petition threatened legal action Will public park organization want legal pursuit town citizens answer would seem obvious modelers now belatedly en courage four-cycle engines limit number planes simultaneously flight Consider engine sound measured mile away club flies five planes together club modelers rubbing salt wounds tagonists Forget lawnmowers passing freight trains full-size planes over headali means absolutely nothing us different sizes engines simultaneous flight doing aerobatics what sort sound frequen cies result Perhaps have noted AMA Contest Board has approved limit 124 cu four-cycle engines RC Pattern special meets fly-ins four-cycles Twilight zone am looking letter R Vince Bentley California Its hIc stationery Control Research Model Dvision found ad index magazine Thats because Control Research vanished early 195 Os its crowning achievement very 20 Model Aviation First class way Eloy Marezs CAP 20 confused 20L powered Kavan Twin spans 88 weighs less 20 lbevidence trend light ness Giant Scaleeven though carries dual airborne system paint scheme authentic Eloy about model early 1984 issues Model Builder magazine Bionic Bat right its first flight Kremer Speed prize flew 1500-meter triangular course roughly 2Y2 mm Permitted 10-mm preflight period during pilot can store energy assist pedaling flight An Astro 40 wound generator pedaled charge 3-lb Ni-Cd pack two Astro 40s contributed propulsion claim prize denied because battery wasnt flat starteven though plane landed charge start MacCready team planning tries may well have won prize before issue reaches readers AeroVironment photo close-up left Bionic Bat plane evidently still development supplied Astros Bob Boucher answers riddle pusher prop installed boom supporting tail sur faces blade configuration theoretical ideal may worth copying large Rubber models geared Electrics big proDs nice two-tube receiver gas-filled RK-61 tube developed Ed Lorenz already pioneered first super-small lightweight single-tuber also RK-61 led Berkeleys Aerotrol miniature British Hivac tube fiendish device Reeds com ing followed proportional days witchcraft about over single tube idled no 15 mils signal dropped 2 3 doing operated relay between 8 Ll activated infamous escapement Eds twotuber idled first tube 2 mils signal triggered second tube now relay tube 25 mils gave authority relaywhich previously loved dance vibration driving escapement model pilot crazy two-tuber got around terrible Continued page 22 What can Telemaster two unique examples snapped H Thomas last years Petit Jean Jumbo Fly-In Left black four-engine ship three-blade props has OS 25s popular multi fliers twin tail pointed nosel Wing integral nacelles straps generous rubber flew finehad great sound Right Ford Trimotor note lovely Commodore ignition Super Cyke foreground flying fantasy performed well 40 noseand dummy windmilling outboard props Two stellar attractions last years Electric Fly Pennsylvania Kim Smith left shows off Ellis Grumers Smith Miniplane Astro Cobalt 15 reduction drivel6cellsof 550 mAh capacity 13-B prop Right Shag Ill hydro wheels held builder Nelson Whit man has Astro Cobalt 15 twelve 12 Ah cells 8-4 prop Pics Herb Dirks May1984 21 limitation single-tuber because gas-filled tubes gave up ghost nothing flat idled 15 mils cost $3 after war few modelers such money Vinces letter Warp 4 stuff Says mention Ed Lorenz John Worth same Control Re search triggered 1949/50 John three other partners gels can dance head pin Ed myself Dick dont remember last name Dick broke ties 1950 1 backed out 1951 Ed wound up firms affairs July 1983 started talk ing about Wakefields Ron Warring Bob Copland etc sent looking up some memorabiliathought readers might like share Author need know Vince wife emigrated England 1947 Ed Bentleys witness acquired citizenship 1954 'During war years England~ Vince recalls new flying sport introducedRound-the-Pole RTP door flying radius 6 ft permis sible around pole thus allowing sport flying average room Clubs competed month mailed times duration SMAE monthly winning times 45-60-sec mark Vince goes decided go out something outstandinga semiscale low wing weighing 5 oz slightly less 5 oz rubber Class slighly over 5 oz rubber Class B two -oz loops rubber geared together l-to-l geared 2-to-i faster-turning propel ler prop automatic variablepitch affair started high pitch went finer pitch progressively torque diminished model set new duration mark 2 mm 22 sec stood until super-duration de sign came Bob Copland low wing later won several speed contests After converting 300 sq Rubber job RC 1949/50 help Lorenz installed early singletuber four-arm escapement Vince became photographer migrated full-size aeronautics Lockheed Burbank spent 25 years Li aison Engineering corresponded Don Dickerson develop ing B&D proportional system about 20 years ago author others flew B&D systemwhich hernia-threatening hand-held transmitter Dons system contem porary Zel Ritchies California latter first brick produced 1956 big brick cause housed servos same case massive receiver Called Space Control later became Orbits first attempt proportional radio 22 Model Aviation WITH FEATURES YOU THE MODELER WANTED Ritchie priced $600 trade show Grand Rapids asked Hal d eBolt any6ne would buy anything expensiveat least $1500 todays dollarsand said Oh theyll buy airight Bentley added fourth chan nel B&D unflown ship VK cabin given Tony Addie Nacarrato Hobby Lobby says Vince pass some deserving youngster Vince spent 18 years fooling live steamstill getting back RC wish could fly darn things laments Vince met Ray Ardn can tell Ray flown gas-powered FF across Van Courtland Park New York City 1904 1904 correct mar ried girl feet landed known modelers worldwide development glow plug 1947and wonderful postwar Arden 09 19 interviewed Ray about time Candlewood Lake home north west Connecticut Before war designed famous Atom 09 Lou Garami working Polks Seventh Ave NYC two floors up almost opposite Penn Station brought national attention published designs especially Strato-Streak Ray Arden made other engines now hear about possibly first time designed tie tacks ran Ray no photos interviewed him Vince seems beaten punch 1948 now Vinces permission privileged show long lost photos remarkable engines virtually no knew existed thought Cox 010 miracle Spook stuff Like other creaky guys have through twin-pushers ROGs gas engines FF Gas CL RC rudder-only whistles-and-bells Scale new worthwhile tech nical development relished dont need Electrified dig discussion X design Weve Astro Hogs Astro this-and thats call Astro Spook Bob Boucher Astro Flight tickled pink name because ship mo tivated Astro Cobalt 05 refers geared big-prop floaters Win ter Syndrome although sells plenty reduction-drive systems both geared belt lovely things please Free Flight soulbut challenged says guys want raw power Can have best two worlds design three-view obviously can powered glow engine weli What different about theme model think unit unit can enlarged provide three basic sizes both glow Continued page 24 High film strength lubricant increased power long engine life Detergents cut performance robbing varnish Highest quality ingredients insure top engine performance reliability Gal Price Drum Price TypeNitro 0/0LubricantFreight PaidFreight-Collect FAI0%Synthetic $ 675 995 5s5%Synthetic $ 775 995 ScS0/oCastor $ 775 995 4cyI7%Castor $ 850 995 lOs10%Synthetic $ 895 995 lOc10%Castor $ 895 995 RIG12%Syn & Castor $ 995 95 iSs15%Synthetic $ 995 995 20c20%Castor 5 95 25s25%Synthetic 5 95 4040%15 Syn-5 Castor 5 95 5050%Synthetic 5 95 6060%Synthetic 5 95 C centlaunus US EXCEPT 54 GAL DRUMS MINIMUM ORDER 4 Gal Asst OK DISCOUNTS 24 63 Gal Deduct 50/a Asstd OK 64 Gal Orders Deduct 100/a Asstd OK SHELDONS Hours HOBBY SHOP Mon-Wed Fri & Sat 3157 Alum Rock Avenue -530 San Jose95127 Thur 930-900 M/C VISA CaliforniaSun 1200-500 UPS COD sis408 2514787 VIJLTMATEFI Voitmaster very precisely measures transmitter receiver battery voltage under load determine whether battery reaching discharged state Green yellow red scales indicate go-caution-no go situation unique features include four voltage ranges including 1 2V starter batteries Load Engage switch monitor recovery rate cells important parameter deter mining cell condition plus Load Status switch two different loads 200 ma 500 ma can engaged large packs 0 mah up mon itored validity Less connectors 26K18Voltmaster Kit$2495 26K 18CVoltmaster Assembled$2995 Send $200 complete catalog Ace items available ACE dealer must order direct add $100 handlingfaeP0 BO511E HIGGIIJ5vILLE MO 64037 816484-7121 May 1984 23 WINNERS Flat platinum coil element Ceramic core Idle Bar Idle cap Send SIOO catalogue ox 31228 Indpls IN 46231 electric-powered sport Electric see 035 right-on 05 075 direct drive mid-sized brother 15s 25s both geared direct big brother 25s 40s glow can 049s 09s 15s 20s perhaps 25s 30s 40s size can have wing cut off tip-bay extended what see soar ing adding bay yields nine versions Naturally wood sizes would beefier glow Bob wanted go 300 sq aileroned high-performance aerobatic thing Im hot pilot compromised 356 sq Cut off tip wish wanted good glide perhaps bit hard-bought soar ing rd need design trick book could fly safely ever get away powered gliders conservative high wings must able duplicate glow engine de signs see Thus low wing Ive always impressed ap pearance performance Don Srulls Rubber Scale model Hem kel fighter produced kit Flyline Models swept-forward trailing edges give aggressive appearance make design difficult minimum-area model ailerons scare Low dragrequires thin wing area shown tip rib model thinner drawn three-view fa miliar center-section flap Top Flites Contender especially poly version know much ship can slowed Like bobbing around top rubber ball Small crements flap proportional could boost lift needed slowed ap proaches flap close touch-down 2 3 deg flap carried tremendous washout effect insurance against snap An optional swept leading edge geom etry showna la theZlin DC-3 AT-6 etc Because washout rear ward-swept version would stable around stall safer - awkward attitudes less proficient piloting save weight small version no rudder used although rudder hinge line shown should wish swept-back rudder hinge line has sub stantial effect holding up inside wing turning small ver sion four servos would required rudder due flaps have three relying ailerons turn roll smooth aileron turns cant afford down-aileron yaw effects vertical tail must large enough pre vent yaw fighting against smooth turns maximum roll-axis stability tips washed-out slightly inclining aileron spar up tip during 24 Model Aviation L5 K construction aft tip section sanded beneath yield stable tip airfoilthus still washout addition center section leading edge rounded lines extreme leading edge descending tip rib washout tip rib flat board no Phillips entry small ships motor battery con sumes much internal space difficult cool case mishap cells become battery ram have quickly-detachable simulated radiator tunnel small version will take either six seven sub-C cells 05 five 800 mAh cells 035easily shifted balancing battery can pop out front fixed tunnel little no harm being done bigger versions twin tunnels located outward center would accommodate twin six-packs tunnels can eliminated favor side scoops jet-fighter style side view profile configuration minimizes diving turns spiraling side area front high rear low Fuselage flat-bottomed top swept down tail Vertical tail height limited tall tails produce ex cess leverage around rolling axis tendency cone glide-turn trims Much vertical tail area below centerline As Pattern need high profile area forward tall canopy made foam bit knife-edge-holding effect keep CG low possibleanother reason tunnel-batterythe flap aileron servos mounted flat line inside wing center section forward main spars other aft Probably six sub-Cs good begin ning point since ship clean 7-5 wood prop could better traditional 7-4 plastic all-up weight should fall between 30 35 oz fuselage seems long reflexes dont permit jackrabbit responses fingers crossed See-through magic Only Charles Dick ens could plot course item Lets begin stunning shot Bionic Bat taken last September 25 during first its two qualifying flights Shafter CA Kremer Speed Prizeto awarded achiev ing average speed 20 mph around 1500-meter triangular course two turning points 750 ters apart triangle otherwise variable Required fly course opposite directions Bionic Bat Bi onic muscle power Bat bat tery used store air crews energy during 1 0-mm period prior takeoff employed case power two I special Astro 40s assisted ped aling pilot making its second pass two Continued page 26 Heres Why. new Zero think youre going like model First its simple common-sense construction will get out workshop onto flying field sooner can really appreciate model Its large size 79 span 90 120 power gives realism stability flight smaller models cant begin match Its total accuracy scale has already made award winner highest Scale Masters static score ever awarded 985 Pilots Choice trophy 1983 excellent choice RC modeler looking step up truly impressive scale model Find out about new Zero other beautiful 1/5 scale models Call write catalog LE1ave iIatt ivuodels inc 6940 NW 15th st1 Plantation FIa 33313 Phone 305 501-4861 02810Mb IJ IJ3fl Butt fif Astounding realism attainabie plastics Very light weight discriminating hobbiest. Either Pilot version kit.. Sportsman Barnstormer.. Darn Good Airmen .. complete NEW LOW PRICES Scale $595 1/4 Scale $795 1/3 Scale 142 May 1984 25 See Deaier add Dollar direct order handiingI 0 The POWR ZOOM winch serious flyer 14 demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplaneXgJL choose speed select pulleys launchaminute flights use companion RETRIEVER MFG OF NI-STARTER $2995 Charger PLEASE SPECIFY WHICH CHARGER WHEN ORDERING DAVEY ICORPORATION SYSTEMS ONE WOOD ANEMALVERNPA19355 215644-0692 Write call information TORK-STARTER revolutionary concept power 15V glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/tO charger has LED indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment raceive free shiopinci handlinci YORK-STARTER $2995 Chargar 11 OV 220V 1 2V Fast Charter $2095 Without Charger CHARGERS $1295 Charger Only 1 1OV 220V 12V Fant Charger 301 464-2260 Send $1 Complete Catalog kits aCCessones Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 26 Model Aviation days later September 27 thought have won Paul Mac Cready-headed bunch prize about $30000 time record initial prizewinner broken other contenders additional prizes about $7500 will awarded until fund about $150000 depleted Editor formation received after column written indicates Royal Aeronautical Society has turned down Human Power Speed claim September 25/2 7 Mac Cready group turn-down due starting non-flat batteryeven though charge battery after attempt before Piloted MacCreadys son Parker 45-ft 84-lb Bionic Bat flew course 2 mm 39 sec 2 mm 35 sec 10-mm energy storage achieved pedaling third Astro 40 especially wound generator charge 3-lb Ni-Cd battery pack Al though carried man could con sider machine big model airplane fact weighs roughly half gross number Giant Scale models have flown successful ly sort thing Bob Campbell might build interested duration Indeed would make ideal electric-powered model Bob Boucher tells us prop re volved 250 rpm dont know gear-down ratio earlier Mac Cready machines did have energy assistance depending pedal ing alone props up 12-ft dia turned 1 00-to-l reduction speed flight safe say its some what faster-turning airscrew smaller diameter could build rather big model Bionic Bat almost anything 02 up doubt ful could built big enough require 40 modelers Bionic Bat spec ulative bonanza will note long prop spinner fact tail surfaces mounted thin boom close-up plc ture prop Bob Boucher Consultant Supplier GeneratorBattery-Motor electrical systems evi dently earlier test craft either re placed intensely modified shows prop hub attached long bearing-like concentric tube re volves boom What appears large ailerons three-axis controllable mount well inboard polydihedral break configuration tapered uptilted tip panels seems bit like winglets deed slow airspeeds angle inclination winglet may consid erably less angle see Learjets etc Like Free Flighters often speculate flight perform ance polydihedral panels because Continued page 28 plus shipping VISA MASTERCARD source QUIET FLIGHT supplies hi-starts accessorieselectric motors & reducers batteriescbutes braided nylon Iinetow lIne drums 12721 HASKELL LANE BOWIE MARYLAND 20716 JSPARROWHAWK1 1/32 SCALE PLASTIC MODEL KIT US Navy Sparrowhawks operated two dirigibles aircraft Carrier uuriIiy tile uS among Colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monotilament rigging U Detailed interior 21488 ClOUD WAY HAYWARD CA 94545 783-4868 28 Model Aviation 47 seem impart something special affect glide-turn characteristics Unexplained what could narrow-chord surfaces trailing edge tipand white blob could well Hoerner-varia tion tip trick light Bionic Bat level flight photo little things become intrigu ing man ground holding wind direction indicator two streamers probably Mylar reveal modest component head cross wind thrust line obviously zero tail boom wing may set slight incidence respect boom hence thrust line all-flying stabilizer tilted up about 5 6 deg pilot has posi tioned Bob Boucher tipped story last September sent scrawled notes some fascinating close-ups prop chain-drive system months went chased loose ends Astro Flight also supplied magic propulsion system Gossamer Penguin 1980 became first airplane history fly direct power sun solar cells 1981 solar-powered Solar Challenger flew 163 miles Paris England altitude 11000 ft Astro 40s translated energy propulsive force big props ticked over like Indoor Rubber stuff remind Gossamer Con dor purely man-powered won first Kremer prize fuel-less flight 1977 craft National Air & Space Museum 1979 Gossamer Albatross won another Kremer prize human-powered flight scross En glish Channel plane Lon don Science Museum Paul MacCready well-known modeler Bob Boucher take great pleasure effects full-scale aviation books Inc magazine growing companies released No vember its annual selection Americas 500 Fastest Growing Private Companies ranked according percentage sales increase fiscal 1978 through fiscal 1983 No 269 Gorham Model Products model Helicopter people boggles mind doesnt inclined think monster cor porations note words Private ly Owned doesnt mean firms have thousands employees al though some might Gorhams own press release proudly tells us company employs 12 full-time office factory personnel uses services 35 Ameri can companies subcontractors manufacturing process its Helicop ters sale popular Cricket given nearing 10000 kits Thats Continued page 13S 01 VOlta01008 O8O Fun/Winter Continued page 28 modest figure still lot choppers modeling world have others course including rotor span 10 ft Army An other requirement magazine s selection sales above $100000 less $15000000 drone connection Although first patented remotely-piloted vehicle drone dated WW days until WW II RPVs became practical part military hardware mainly lifelike targets Things like OQ2A remembered modelers later full-scale all-wood Culver Ca det About 12 ft span generous dihedral OQ2A powered Mc Culloch engine Ive told thing 5 10 hp up 18 looked like overblown Outdoor Rub ber job flat-topped triangular cross-sectioned fuselage thing catapulted shock cord off long launcher open-frame tubular con struction could hit 175 retrieval hit shut down engine popped chute top hatch first Mirror Meet 1947 Grummans Bethpage Long Island Army demonstrated three Wild man shot vertically over head heard did see thunderous impact concrete runway under Good Humor truck As Free Flight er knew what expect An other tore up sky until pilot goofed radio glitched demolish ing chicken coop its feathered habitants So heres Warren Anderson started Ohlsson 23 FF Gas jobs before WW II military assignments writes crew chief Radio Airplane Target Detachment flying OQ 2A drones first crew trained Army personnel Fort Bliss TX 1943 related us Good brothers taken RC idea several military units unable stir up much interest Finally US Cavalry accepted idea ac cording developed OQ2A wonder what Walt Good has say about Reginald Denny involved early manufacturing plane Mr Smith pointed out article merican Aircraft Modeler March 1971 picture took Radioplane plant 1943 shows both Smith Denny Reginald Denny handsome movie actor considerable fame truly good guy aviation Im going check out believe Reginald pilot interested air schools certainly major model airplane manufacturer advertised heavily mags grand FF Gas model kit Dennyplane fondly-re membered engine Dennymite Dennyplane famous day round-nosed aluminum cowl highwinged cabin model flew superb ly gosh looked like full-size plane lot people recent years have built thanks Doc Mathews revival January 1977 Model Aviation Plan No 169 $4 Power 19 25 Denny far cellu loid hero us Youll love Dennyplane Incidentally Radioplane produced 13935 drones under three designations Bill Winter 4426 Altura Ct Fairfax VA 22030 Cavalier/Laycock Continued oaoe 37 Epoxy balsa blocks place engine cowl Shape sand final contour keep very sharp chisel handy shaping carving balsa find faster using razor blades knife Use chisel carve close final size finish sanding Add gussets windshield side windows affixed contact cement engine compartment given two coats epoxy paint little tricky paint around engine mount used long cotton swab inserted through drain Continued page 138 May1984 135
Edition: Model Aviation - 1984/05
Page Numbers: 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 135
FIVE MINUTES AGO bellyaching temperature bone-chilling snow about superheated summer 1983 falling resolution made Now write shortly after New involuntary stay away epoxy Years Daythe low sky lead gray the past five years Ive increas During 1948 Vince Bentley obtained three amazing photos Ray Arden Vince believes Ray designed after Atom 09 Bill Winter remembers lrv Polk talking about somebodys miniature engines before Atom produced Poiks tiny Free Flight held Arden model would ROG ice front yard lake tiny square hole spinner accepted ratcheted starter Ray spun between forefinger thumb three engines appear different Two ob viously spark ignition note timer ad vance arms Two have underslung tanks different No tank visible the model engine could have glowl No spark-ignition points visible Props turn clockwise appears lami nated small engines paper match much longer inch ing sensitivity whiff produces angry welts itching lasts months did resolve fly year want fly Electric high-per formance fighter-like thing flaps cobalt direct-drive 05and some ultimate efficient thing yet paper will run 13-min-plus perhaps attain total duration 15 1 8 mm thermal assistance using reduction setup huge fold ing fan have five glow-powered slow ships soaring ability shy either radio engine Two Giant Scale jobs roost rafters up Long Island retread guy cant cope such giants guys will buy van Ill reconsider Ever hang 10-ft monsters shop have battered Kadet fun Eaglet will have Enya 40 fourcycle Eagle springwith flaps big Krackerjac spoilers study procrastinated maintenance Theres Midwest Sniffer Astro 035 elec tric motor get too confused will fly nearby school yard until sort things out What else Oh yes Farman 400 Scale project shared Bill Kaluf Its tail-dragger no-dihedral can tilever wing huge flaps OS 40 four-cycle have rubber-powered Lincoln monoplane mind Rub ber power isnt peculiar Flying Models magazine sold over 800 plans year Srulls Shinden canard Only rare RC ships surpass Theres rud der-only throttle 22-year-old make-beheve Airknocker repub lished April Flying Models first printed 1963 Its wheels almost shapeless blobs pocked rubber treads long gone engine Enya lapped 09 also over 20 years old high-tech engines bite dust soon have Wankel engine havent yet figured out what rack mysterious wings tells have other ships hidden somewhere should trash can see dont want face up writing Too much talk about ship have 10 stories tell cat asleep foot-high mound photos Im asleep top Hermes just told editor de mand entire magazine remminds bad would nothing write about Four-cycle engines lost flying sites U jUSt fun Bill Winter U preoccupy Three years ago mesmerized first four-cycle heard run Andrews Aeromaster 05 60 yielded kind per formance old-timers dreamed about since someone named Feeney produced four-cycle briefly during war never saw Now fourcycles everywhere Oddly exception AMA PR Departments Doug Pratt four-cycles few far between huge local club Doug kid behind ice cream counter whomping out everything gliders Coverite Gee Bees scads kits gaggles RTFs Electrics now Giant Scale drag Pratt along nearby sites sits folding chair flies back forth extreme distances usually about 45 mm After such ses sion found antenna Adcom receiver unwrapped identify two planes son Mike started RC began hA-powered Gentle Lady Top Flite Metrick latter slip pery got him try Air Scout Concept Models OS 15 1 liked enough urge Doug try Ace RC acquired Owen Kampen design reengineered simplicity Lite Ply sides Dougs moves out Saito 30 four-cycle turning big prop Mean Mike transferred after framing G-S Stinson design Bob Smurthwaite Pratt powered Saito 40 four-cycle Years ago G-S Stinson won RCMs Best Scale Year award Its too big has scale ribs etc seemingly quite heavy seen pictures Smurthwaites Stinson Howard flying floats nagging doubts use flaps properly ailerons slightly reflexed joy Doug has RAM lights includ ing strobe rudder tip running lights bright landing lights Touch5~OVTU~Z .kn&IQtIi~ CILsCCQLi15SULN CM T Sru_________ 1I$SVE2 CtEO FUSLGE0 IO0 UMR KlACk OPLANDS RTP MODEL 0 0M4 PROPOLLER_______________ RJLQR9O'LII L.2Li LENGTh 176 TOTAL WFIrwT top drawing 1946 issue British magazine Model Aircraft since discontinued Vince Bentleys Round-the-Pole speedster RTP flying craze England years capable 222 5 OL rubber two loops geared 11 geared prop 21 Noted Wakefielder Bob Copland quickly boosted RTP mark 4-plus mm illustrated model having microfilm covering single-wheel gear Drawings both models appeared same issue Coplands 10-in prop almost half 21%-in span Model weighed 5/8 oz Broken line outlining wing shows larger version broke 4% mm Flown 6-ft lines and-goes lights quite fly experience normally too dark Kaluf modernized RC Spe Winter thinks four-cycle engines real Silent Revolution hes intrigued sight Doug Pratt seated folding chair flying two ships back forth 45 mm long-legged flights planes interesting left G-S Stinson Saito 40 flaps work flawlessly picture-book landings rather high loading also has RAM strobe tail light tip lights landing lights glow brilliantly dusk other plane Air Scout designed Owen Kampen Concept Madels now kitted Ace Its Saito 30 heavy plane chugs along like lightplane cross countrytached 800850 rpm idle 8-6 Master Airacrew May1984 19 Taken Radiaplane plant 1943 Reginald Denny stands second right interna tional movie star Denny active aviation modeling Radioplane produced some 13000 early drones target practice ancestors todays sophisticated RPVs Denny remembered Dervnymite engine famous kit Dennyplane realistic fine-flying cabin plane revived Doc Mathews January 1977 MA Plan No 169 photo Warren Anderson AMA 1083 also license number NAA before AMA began Saito 30 Hobby Lobbys Klemm can landed tick-tick idle Dougs Saito 30 idles low 860 rpmOK dont believe 0S 40 four-cycle Farman four-cycles vastly underrated cial using 2 deg dihedral longer nose flaps ailerons chose 05 40 four-cycle turns 13-5 superb flier Kalufs redesigned RC Special will two-parter Aus tralian Airborne magazine also has 25/8djhedrol R/O 7/8for ailerons0 optional wing geometry K K__ LI [J L4 flop deflection ASTRO SPOOK Designed BILL WINTER WING SPANS 45 l/2 WING AREA 356 SO INS POWERASTRO FLIGHT 05 COBALT DIRECT PROP 7D X 4P fIap piece 0 0 Li Winters experimental low-winger direct-drive cobalt electric motor features ailerons/ elevator/shut-offand center-section flaps battery radiator tunnel low center gravity good cooling Theres much about design characteristics text turn big props large disk areas have great thrust burn fuel 50% less normal rate Since four-cycles quiet may answer noise problem Muffled Schnuerles have improved horrendous situation goes back years understand noise sound frequency annoys peopletheres nothing irritating whining Ive involved ongoing battle between people roughtly mile flying site guys fly park use strict muffler rules stern practices guys measure sound officials observing sound has measured area com plaints level lowerusing noisiest engine divethan passing truck several blocks away car start ing up three driveways equip ment park officials agreed complaints groundless 35 people signed petition threatened legal action Will public park organization want legal pursuit town citizens answer would seem obvious modelers now belatedly en courage four-cycle engines limit number planes simultaneously flight Consider engine sound measured mile away club flies five planes together club modelers rubbing salt wounds tagonists Forget lawnmowers passing freight trains full-size planes over headali means absolutely nothing us different sizes engines simultaneous flight doing aerobatics what sort sound frequen cies result Perhaps have noted AMA Contest Board has approved limit 124 cu four-cycle engines RC Pattern special meets fly-ins four-cycles Twilight zone am looking letter R Vince Bentley California Its hIc stationery Control Research Model Dvision found ad index magazine Thats because Control Research vanished early 195 Os its crowning achievement very 20 Model Aviation First class way Eloy Marezs CAP 20 confused 20L powered Kavan Twin spans 88 weighs less 20 lbevidence trend light ness Giant Scaleeven though carries dual airborne system paint scheme authentic Eloy about model early 1984 issues Model Builder magazine Bionic Bat right its first flight Kremer Speed prize flew 1500-meter triangular course roughly 2Y2 mm Permitted 10-mm preflight period during pilot can store energy assist pedaling flight An Astro 40 wound generator pedaled charge 3-lb Ni-Cd pack two Astro 40s contributed propulsion claim prize denied because battery wasnt flat starteven though plane landed charge start MacCready team planning tries may well have won prize before issue reaches readers AeroVironment photo close-up left Bionic Bat plane evidently still development supplied Astros Bob Boucher answers riddle pusher prop installed boom supporting tail sur faces blade configuration theoretical ideal may worth copying large Rubber models geared Electrics big proDs nice two-tube receiver gas-filled RK-61 tube developed Ed Lorenz already pioneered first super-small lightweight single-tuber also RK-61 led Berkeleys Aerotrol miniature British Hivac tube fiendish device Reeds com ing followed proportional days witchcraft about over single tube idled no 15 mils signal dropped 2 3 doing operated relay between 8 Ll activated infamous escapement Eds twotuber idled first tube 2 mils signal triggered second tube now relay tube 25 mils gave authority relaywhich previously loved dance vibration driving escapement model pilot crazy two-tuber got around terrible Continued page 22 What can Telemaster two unique examples snapped H Thomas last years Petit Jean Jumbo Fly-In Left black four-engine ship three-blade props has OS 25s popular multi fliers twin tail pointed nosel Wing integral nacelles straps generous rubber flew finehad great sound Right Ford Trimotor note lovely Commodore ignition Super Cyke foreground flying fantasy performed well 40 noseand dummy windmilling outboard props Two stellar attractions last years Electric Fly Pennsylvania Kim Smith left shows off Ellis Grumers Smith Miniplane Astro Cobalt 15 reduction drivel6cellsof 550 mAh capacity 13-B prop Right Shag Ill hydro wheels held builder Nelson Whit man has Astro Cobalt 15 twelve 12 Ah cells 8-4 prop Pics Herb Dirks May1984 21 limitation single-tuber because gas-filled tubes gave up ghost nothing flat idled 15 mils cost $3 after war few modelers such money Vinces letter Warp 4 stuff Says mention Ed Lorenz John Worth same Control Re search triggered 1949/50 John three other partners gels can dance head pin Ed myself Dick dont remember last name Dick broke ties 1950 1 backed out 1951 Ed wound up firms affairs July 1983 started talk ing about Wakefields Ron Warring Bob Copland etc sent looking up some memorabiliathought readers might like share Author need know Vince wife emigrated England 1947 Ed Bentleys witness acquired citizenship 1954 'During war years England~ Vince recalls new flying sport introducedRound-the-Pole RTP door flying radius 6 ft permis sible around pole thus allowing sport flying average room Clubs competed month mailed times duration SMAE monthly winning times 45-60-sec mark Vince goes decided go out something outstandinga semiscale low wing weighing 5 oz slightly less 5 oz rubber Class slighly over 5 oz rubber Class B two -oz loops rubber geared together l-to-l geared 2-to-i faster-turning propel ler prop automatic variablepitch affair started high pitch went finer pitch progressively torque diminished model set new duration mark 2 mm 22 sec stood until super-duration de sign came Bob Copland low wing later won several speed contests After converting 300 sq Rubber job RC 1949/50 help Lorenz installed early singletuber four-arm escapement Vince became photographer migrated full-size aeronautics Lockheed Burbank spent 25 years Li aison Engineering corresponded Don Dickerson develop ing B&D proportional system about 20 years ago author others flew B&D systemwhich hernia-threatening hand-held transmitter Dons system contem porary Zel Ritchies California latter first brick produced 1956 big brick cause housed servos same case massive receiver Called Space Control later became Orbits first attempt proportional radio 22 Model Aviation WITH FEATURES YOU THE MODELER WANTED Ritchie priced $600 trade show Grand Rapids asked Hal d eBolt any6ne would buy anything expensiveat least $1500 todays dollarsand said Oh theyll buy airight Bentley added fourth chan nel B&D unflown ship VK cabin given Tony Addie Nacarrato Hobby Lobby says Vince pass some deserving youngster Vince spent 18 years fooling live steamstill getting back RC wish could fly darn things laments Vince met Ray Ardn can tell Ray flown gas-powered FF across Van Courtland Park New York City 1904 1904 correct mar ried girl feet landed known modelers worldwide development glow plug 1947and wonderful postwar Arden 09 19 interviewed Ray about time Candlewood Lake home north west Connecticut Before war designed famous Atom 09 Lou Garami working Polks Seventh Ave NYC two floors up almost opposite Penn Station brought national attention published designs especially Strato-Streak Ray Arden made other engines now hear about possibly first time designed tie tacks ran Ray no photos interviewed him Vince seems beaten punch 1948 now Vinces permission privileged show long lost photos remarkable engines virtually no knew existed thought Cox 010 miracle Spook stuff Like other creaky guys have through twin-pushers ROGs gas engines FF Gas CL RC rudder-only whistles-and-bells Scale new worthwhile tech nical development relished dont need Electrified dig discussion X design Weve Astro Hogs Astro this-and thats call Astro Spook Bob Boucher Astro Flight tickled pink name because ship mo tivated Astro Cobalt 05 refers geared big-prop floaters Win ter Syndrome although sells plenty reduction-drive systems both geared belt lovely things please Free Flight soulbut challenged says guys want raw power Can have best two worlds design three-view obviously can powered glow engine weli What different about theme model think unit unit can enlarged provide three basic sizes both glow Continued page 24 High film strength lubricant increased power long engine life Detergents cut performance robbing varnish Highest quality ingredients insure top engine performance reliability Gal Price Drum Price TypeNitro 0/0LubricantFreight PaidFreight-Collect FAI0%Synthetic $ 675 995 5s5%Synthetic $ 775 995 ScS0/oCastor $ 775 995 4cyI7%Castor $ 850 995 lOs10%Synthetic $ 895 995 lOc10%Castor $ 895 995 RIG12%Syn & Castor $ 995 95 iSs15%Synthetic $ 995 995 20c20%Castor 5 95 25s25%Synthetic 5 95 4040%15 Syn-5 Castor 5 95 5050%Synthetic 5 95 6060%Synthetic 5 95 C centlaunus US EXCEPT 54 GAL DRUMS MINIMUM ORDER 4 Gal Asst OK DISCOUNTS 24 63 Gal Deduct 50/a Asstd OK 64 Gal Orders Deduct 100/a Asstd OK SHELDONS Hours HOBBY SHOP Mon-Wed Fri & Sat 3157 Alum Rock Avenue -530 San Jose95127 Thur 930-900 M/C VISA CaliforniaSun 1200-500 UPS COD sis408 2514787 VIJLTMATEFI Voitmaster very precisely measures transmitter receiver battery voltage under load determine whether battery reaching discharged state Green yellow red scales indicate go-caution-no go situation unique features include four voltage ranges including 1 2V starter batteries Load Engage switch monitor recovery rate cells important parameter deter mining cell condition plus Load Status switch two different loads 200 ma 500 ma can engaged large packs 0 mah up mon itored validity Less connectors 26K18Voltmaster Kit$2495 26K 18CVoltmaster Assembled$2995 Send $200 complete catalog Ace items available ACE dealer must order direct add $100 handlingfaeP0 BO511E HIGGIIJ5vILLE MO 64037 816484-7121 May 1984 23 WINNERS Flat platinum coil element Ceramic core Idle Bar Idle cap Send SIOO catalogue ox 31228 Indpls IN 46231 electric-powered sport Electric see 035 right-on 05 075 direct drive mid-sized brother 15s 25s both geared direct big brother 25s 40s glow can 049s 09s 15s 20s perhaps 25s 30s 40s size can have wing cut off tip-bay extended what see soar ing adding bay yields nine versions Naturally wood sizes would beefier glow Bob wanted go 300 sq aileroned high-performance aerobatic thing Im hot pilot compromised 356 sq Cut off tip wish wanted good glide perhaps bit hard-bought soar ing rd need design trick book could fly safely ever get away powered gliders conservative high wings must able duplicate glow engine de signs see Thus low wing Ive always impressed ap pearance performance Don Srulls Rubber Scale model Hem kel fighter produced kit Flyline Models swept-forward trailing edges give aggressive appearance make design difficult minimum-area model ailerons scare Low dragrequires thin wing area shown tip rib model thinner drawn three-view fa miliar center-section flap Top Flites Contender especially poly version know much ship can slowed Like bobbing around top rubber ball Small crements flap proportional could boost lift needed slowed ap proaches flap close touch-down 2 3 deg flap carried tremendous washout effect insurance against snap An optional swept leading edge geom etry showna la theZlin DC-3 AT-6 etc Because washout rear ward-swept version would stable around stall safer - awkward attitudes less proficient piloting save weight small version no rudder used although rudder hinge line shown should wish swept-back rudder hinge line has sub stantial effect holding up inside wing turning small ver sion four servos would required rudder due flaps have three relying ailerons turn roll smooth aileron turns cant afford down-aileron yaw effects vertical tail must large enough pre vent yaw fighting against smooth turns maximum roll-axis stability tips washed-out slightly inclining aileron spar up tip during 24 Model Aviation L5 K construction aft tip section sanded beneath yield stable tip airfoilthus still washout addition center section leading edge rounded lines extreme leading edge descending tip rib washout tip rib flat board no Phillips entry small ships motor battery con sumes much internal space difficult cool case mishap cells become battery ram have quickly-detachable simulated radiator tunnel small version will take either six seven sub-C cells 05 five 800 mAh cells 035easily shifted balancing battery can pop out front fixed tunnel little no harm being done bigger versions twin tunnels located outward center would accommodate twin six-packs tunnels can eliminated favor side scoops jet-fighter style side view profile configuration minimizes diving turns spiraling side area front high rear low Fuselage flat-bottomed top swept down tail Vertical tail height limited tall tails produce ex cess leverage around rolling axis tendency cone glide-turn trims Much vertical tail area below centerline As Pattern need high profile area forward tall canopy made foam bit knife-edge-holding effect keep CG low possibleanother reason tunnel-batterythe flap aileron servos mounted flat line inside wing center section forward main spars other aft Probably six sub-Cs good begin ning point since ship clean 7-5 wood prop could better traditional 7-4 plastic all-up weight should fall between 30 35 oz fuselage seems long reflexes dont permit jackrabbit responses fingers crossed See-through magic Only Charles Dick ens could plot course item Lets begin stunning shot Bionic Bat taken last September 25 during first its two qualifying flights Shafter CA Kremer Speed Prizeto awarded achiev ing average speed 20 mph around 1500-meter triangular course two turning points 750 ters apart triangle otherwise variable Required fly course opposite directions Bionic Bat Bi onic muscle power Bat bat tery used store air crews energy during 1 0-mm period prior takeoff employed case power two I special Astro 40s assisted ped aling pilot making its second pass two Continued page 26 Heres Why. new Zero think youre going like model First its simple common-sense construction will get out workshop onto flying field sooner can really appreciate model Its large size 79 span 90 120 power gives realism stability flight smaller models cant begin match Its total accuracy scale has already made award winner highest Scale Masters static score ever awarded 985 Pilots Choice trophy 1983 excellent choice RC modeler looking step up truly impressive scale model Find out about new Zero other beautiful 1/5 scale models Call write catalog LE1ave iIatt ivuodels inc 6940 NW 15th st1 Plantation FIa 33313 Phone 305 501-4861 02810Mb IJ IJ3fl Butt fif Astounding realism attainabie plastics Very light weight discriminating hobbiest. Either Pilot version kit.. Sportsman Barnstormer.. Darn Good Airmen .. complete NEW LOW PRICES Scale $595 1/4 Scale $795 1/3 Scale 142 May 1984 25 See Deaier add Dollar direct order handiingI 0 The POWR ZOOM winch serious flyer 14 demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplaneXgJL choose speed select pulleys launchaminute flights use companion RETRIEVER MFG OF NI-STARTER $2995 Charger PLEASE SPECIFY WHICH CHARGER WHEN ORDERING DAVEY ICORPORATION SYSTEMS ONE WOOD ANEMALVERNPA19355 215644-0692 Write call information TORK-STARTER revolutionary concept power 15V glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/tO charger has LED indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment raceive free shiopinci handlinci YORK-STARTER $2995 Chargar 11 OV 220V 1 2V Fast Charter $2095 Without Charger CHARGERS $1295 Charger Only 1 1OV 220V 12V Fant Charger 301 464-2260 Send $1 Complete Catalog kits aCCessones Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 26 Model Aviation days later September 27 thought have won Paul Mac Cready-headed bunch prize about $30000 time record initial prizewinner broken other contenders additional prizes about $7500 will awarded until fund about $150000 depleted Editor formation received after column written indicates Royal Aeronautical Society has turned down Human Power Speed claim September 25/2 7 Mac Cready group turn-down due starting non-flat batteryeven though charge battery after attempt before Piloted MacCreadys son Parker 45-ft 84-lb Bionic Bat flew course 2 mm 39 sec 2 mm 35 sec 10-mm energy storage achieved pedaling third Astro 40 especially wound generator charge 3-lb Ni-Cd battery pack Al though carried man could con sider machine big model airplane fact weighs roughly half gross number Giant Scale models have flown successful ly sort thing Bob Campbell might build interested duration Indeed would make ideal electric-powered model Bob Boucher tells us prop re volved 250 rpm dont know gear-down ratio earlier Mac Cready machines did have energy assistance depending pedal ing alone props up 12-ft dia turned 1 00-to-l reduction speed flight safe say its some what faster-turning airscrew smaller diameter could build rather big model Bionic Bat almost anything 02 up doubt ful could built big enough require 40 modelers Bionic Bat spec ulative bonanza will note long prop spinner fact tail surfaces mounted thin boom close-up plc ture prop Bob Boucher Consultant Supplier GeneratorBattery-Motor electrical systems evi dently earlier test craft either re placed intensely modified shows prop hub attached long bearing-like concentric tube re volves boom What appears large ailerons three-axis controllable mount well inboard polydihedral break configuration tapered uptilted tip panels seems bit like winglets deed slow airspeeds angle inclination winglet may consid erably less angle see Learjets etc Like Free Flighters often speculate flight perform ance polydihedral panels because Continued page 28 plus shipping VISA MASTERCARD source QUIET FLIGHT supplies hi-starts accessorieselectric motors & reducers batteriescbutes braided nylon Iinetow lIne drums 12721 HASKELL LANE BOWIE MARYLAND 20716 JSPARROWHAWK1 1/32 SCALE PLASTIC MODEL KIT US Navy Sparrowhawks operated two dirigibles aircraft Carrier uuriIiy tile uS among Colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monotilament rigging U Detailed interior 21488 ClOUD WAY HAYWARD CA 94545 783-4868 28 Model Aviation 47 seem impart something special affect glide-turn characteristics Unexplained what could narrow-chord surfaces trailing edge tipand white blob could well Hoerner-varia tion tip trick light Bionic Bat level flight photo little things become intrigu ing man ground holding wind direction indicator two streamers probably Mylar reveal modest component head cross wind thrust line obviously zero tail boom wing may set slight incidence respect boom hence thrust line all-flying stabilizer tilted up about 5 6 deg pilot has posi tioned Bob Boucher tipped story last September sent scrawled notes some fascinating close-ups prop chain-drive system months went chased loose ends Astro Flight also supplied magic propulsion system Gossamer Penguin 1980 became first airplane history fly direct power sun solar cells 1981 solar-powered Solar Challenger flew 163 miles Paris England altitude 11000 ft Astro 40s translated energy propulsive force big props ticked over like Indoor Rubber stuff remind Gossamer Con dor purely man-powered won first Kremer prize fuel-less flight 1977 craft National Air & Space Museum 1979 Gossamer Albatross won another Kremer prize human-powered flight scross En glish Channel plane Lon don Science Museum Paul MacCready well-known modeler Bob Boucher take great pleasure effects full-scale aviation books Inc magazine growing companies released No vember its annual selection Americas 500 Fastest Growing Private Companies ranked according percentage sales increase fiscal 1978 through fiscal 1983 No 269 Gorham Model Products model Helicopter people boggles mind doesnt inclined think monster cor porations note words Private ly Owned doesnt mean firms have thousands employees al though some might Gorhams own press release proudly tells us company employs 12 full-time office factory personnel uses services 35 Ameri can companies subcontractors manufacturing process its Helicop ters sale popular Cricket given nearing 10000 kits Thats Continued page 13S 01 VOlta01008 O8O Fun/Winter Continued page 28 modest figure still lot choppers modeling world have others course including rotor span 10 ft Army An other requirement magazine s selection sales above $100000 less $15000000 drone connection Although first patented remotely-piloted vehicle drone dated WW days until WW II RPVs became practical part military hardware mainly lifelike targets Things like OQ2A remembered modelers later full-scale all-wood Culver Ca det About 12 ft span generous dihedral OQ2A powered Mc Culloch engine Ive told thing 5 10 hp up 18 looked like overblown Outdoor Rub ber job flat-topped triangular cross-sectioned fuselage thing catapulted shock cord off long launcher open-frame tubular con struction could hit 175 retrieval hit shut down engine popped chute top hatch first Mirror Meet 1947 Grummans Bethpage Long Island Army demonstrated three Wild man shot vertically over head heard did see thunderous impact concrete runway under Good Humor truck As Free Flight er knew what expect An other tore up sky until pilot goofed radio glitched demolish ing chicken coop its feathered habitants So heres Warren Anderson started Ohlsson 23 FF Gas jobs before WW II military assignments writes crew chief Radio Airplane Target Detachment flying OQ 2A drones first crew trained Army personnel Fort Bliss TX 1943 related us Good brothers taken RC idea several military units unable stir up much interest Finally US Cavalry accepted idea ac cording developed OQ2A wonder what Walt Good has say about Reginald Denny involved early manufacturing plane Mr Smith pointed out article merican Aircraft Modeler March 1971 picture took Radioplane plant 1943 shows both Smith Denny Reginald Denny handsome movie actor considerable fame truly good guy aviation Im going check out believe Reginald pilot interested air schools certainly major model airplane manufacturer advertised heavily mags grand FF Gas model kit Dennyplane fondly-re membered engine Dennymite Dennyplane famous day round-nosed aluminum cowl highwinged cabin model flew superb ly gosh looked like full-size plane lot people recent years have built thanks Doc Mathews revival January 1977 Model Aviation Plan No 169 $4 Power 19 25 Denny far cellu loid hero us Youll love Dennyplane Incidentally Radioplane produced 13935 drones under three designations Bill Winter 4426 Altura Ct Fairfax VA 22030 Cavalier/Laycock Continued oaoe 37 Epoxy balsa blocks place engine cowl Shape sand final contour keep very sharp chisel handy shaping carving balsa find faster using razor blades knife Use chisel carve close final size finish sanding Add gussets windshield side windows affixed contact cement engine compartment given two coats epoxy paint little tricky paint around engine mount used long cotton swab inserted through drain Continued page 138 May1984 135
Edition: Model Aviation - 1984/05
Page Numbers: 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 135
FIVE MINUTES AGO bellyaching temperature bone-chilling snow about superheated summer 1983 falling resolution made Now write shortly after New involuntary stay away epoxy Years Daythe low sky lead gray the past five years Ive increas During 1948 Vince Bentley obtained three amazing photos Ray Arden Vince believes Ray designed after Atom 09 Bill Winter remembers lrv Polk talking about somebodys miniature engines before Atom produced Poiks tiny Free Flight held Arden model would ROG ice front yard lake tiny square hole spinner accepted ratcheted starter Ray spun between forefinger thumb three engines appear different Two ob viously spark ignition note timer ad vance arms Two have underslung tanks different No tank visible the model engine could have glowl No spark-ignition points visible Props turn clockwise appears lami nated small engines paper match much longer inch ing sensitivity whiff produces angry welts itching lasts months did resolve fly year want fly Electric high-per formance fighter-like thing flaps cobalt direct-drive 05and some ultimate efficient thing yet paper will run 13-min-plus perhaps attain total duration 15 1 8 mm thermal assistance using reduction setup huge fold ing fan have five glow-powered slow ships soaring ability shy either radio engine Two Giant Scale jobs roost rafters up Long Island retread guy cant cope such giants guys will buy van Ill reconsider Ever hang 10-ft monsters shop have battered Kadet fun Eaglet will have Enya 40 fourcycle Eagle springwith flaps big Krackerjac spoilers study procrastinated maintenance Theres Midwest Sniffer Astro 035 elec tric motor get too confused will fly nearby school yard until sort things out What else Oh yes Farman 400 Scale project shared Bill Kaluf Its tail-dragger no-dihedral can tilever wing huge flaps OS 40 four-cycle have rubber-powered Lincoln monoplane mind Rub ber power isnt peculiar Flying Models magazine sold over 800 plans year Srulls Shinden canard Only rare RC ships surpass Theres rud der-only throttle 22-year-old make-beheve Airknocker repub lished April Flying Models first printed 1963 Its wheels almost shapeless blobs pocked rubber treads long gone engine Enya lapped 09 also over 20 years old high-tech engines bite dust soon have Wankel engine havent yet figured out what rack mysterious wings tells have other ships hidden somewhere should trash can see dont want face up writing Too much talk about ship have 10 stories tell cat asleep foot-high mound photos Im asleep top Hermes just told editor de mand entire magazine remminds bad would nothing write about Four-cycle engines lost flying sites U jUSt fun Bill Winter U preoccupy Three years ago mesmerized first four-cycle heard run Andrews Aeromaster 05 60 yielded kind per formance old-timers dreamed about since someone named Feeney produced four-cycle briefly during war never saw Now fourcycles everywhere Oddly exception AMA PR Departments Doug Pratt four-cycles few far between huge local club Doug kid behind ice cream counter whomping out everything gliders Coverite Gee Bees scads kits gaggles RTFs Electrics now Giant Scale drag Pratt along nearby sites sits folding chair flies back forth extreme distances usually about 45 mm After such ses sion found antenna Adcom receiver unwrapped identify two planes son Mike started RC began hA-powered Gentle Lady Top Flite Metrick latter slip pery got him try Air Scout Concept Models OS 15 1 liked enough urge Doug try Ace RC acquired Owen Kampen design reengineered simplicity Lite Ply sides Dougs moves out Saito 30 four-cycle turning big prop Mean Mike transferred after framing G-S Stinson design Bob Smurthwaite Pratt powered Saito 40 four-cycle Years ago G-S Stinson won RCMs Best Scale Year award Its too big has scale ribs etc seemingly quite heavy seen pictures Smurthwaites Stinson Howard flying floats nagging doubts use flaps properly ailerons slightly reflexed joy Doug has RAM lights includ ing strobe rudder tip running lights bright landing lights Touch5~OVTU~Z .kn&IQtIi~ CILsCCQLi15SULN CM T Sru_________ 1I$SVE2 CtEO FUSLGE0 IO0 UMR KlACk OPLANDS RTP MODEL 0 0M4 PROPOLLER_______________ RJLQR9O'LII L.2Li LENGTh 176 TOTAL WFIrwT top drawing 1946 issue British magazine Model Aircraft since discontinued Vince Bentleys Round-the-Pole speedster RTP flying craze England years capable 222 5 OL rubber two loops geared 11 geared prop 21 Noted Wakefielder Bob Copland quickly boosted RTP mark 4-plus mm illustrated model having microfilm covering single-wheel gear Drawings both models appeared same issue Coplands 10-in prop almost half 21%-in span Model weighed 5/8 oz Broken line outlining wing shows larger version broke 4% mm Flown 6-ft lines and-goes lights quite fly experience normally too dark Kaluf modernized RC Spe Winter thinks four-cycle engines real Silent Revolution hes intrigued sight Doug Pratt seated folding chair flying two ships back forth 45 mm long-legged flights planes interesting left G-S Stinson Saito 40 flaps work flawlessly picture-book landings rather high loading also has RAM strobe tail light tip lights landing lights glow brilliantly dusk other plane Air Scout designed Owen Kampen Concept Madels now kitted Ace Its Saito 30 heavy plane chugs along like lightplane cross countrytached 800850 rpm idle 8-6 Master Airacrew May1984 19 Taken Radiaplane plant 1943 Reginald Denny stands second right interna tional movie star Denny active aviation modeling Radioplane produced some 13000 early drones target practice ancestors todays sophisticated RPVs Denny remembered Dervnymite engine famous kit Dennyplane realistic fine-flying cabin plane revived Doc Mathews January 1977 MA Plan No 169 photo Warren Anderson AMA 1083 also license number NAA before AMA began Saito 30 Hobby Lobbys Klemm can landed tick-tick idle Dougs Saito 30 idles low 860 rpmOK dont believe 0S 40 four-cycle Farman four-cycles vastly underrated cial using 2 deg dihedral longer nose flaps ailerons chose 05 40 four-cycle turns 13-5 superb flier Kalufs redesigned RC Special will two-parter Aus tralian Airborne magazine also has 25/8djhedrol R/O 7/8for ailerons0 optional wing geometry K K__ LI [J L4 flop deflection ASTRO SPOOK Designed BILL WINTER WING SPANS 45 l/2 WING AREA 356 SO INS POWERASTRO FLIGHT 05 COBALT DIRECT PROP 7D X 4P fIap piece 0 0 Li Winters experimental low-winger direct-drive cobalt electric motor features ailerons/ elevator/shut-offand center-section flaps battery radiator tunnel low center gravity good cooling Theres much about design characteristics text turn big props large disk areas have great thrust burn fuel 50% less normal rate Since four-cycles quiet may answer noise problem Muffled Schnuerles have improved horrendous situation goes back years understand noise sound frequency annoys peopletheres nothing irritating whining Ive involved ongoing battle between people roughtly mile flying site guys fly park use strict muffler rules stern practices guys measure sound officials observing sound has measured area com plaints level lowerusing noisiest engine divethan passing truck several blocks away car start ing up three driveways equip ment park officials agreed complaints groundless 35 people signed petition threatened legal action Will public park organization want legal pursuit town citizens answer would seem obvious modelers now belatedly en courage four-cycle engines limit number planes simultaneously flight Consider engine sound measured mile away club flies five planes together club modelers rubbing salt wounds tagonists Forget lawnmowers passing freight trains full-size planes over headali means absolutely nothing us different sizes engines simultaneous flight doing aerobatics what sort sound frequen cies result Perhaps have noted AMA Contest Board has approved limit 124 cu four-cycle engines RC Pattern special meets fly-ins four-cycles Twilight zone am looking letter R Vince Bentley California Its hIc stationery Control Research Model Dvision found ad index magazine Thats because Control Research vanished early 195 Os its crowning achievement very 20 Model Aviation First class way Eloy Marezs CAP 20 confused 20L powered Kavan Twin spans 88 weighs less 20 lbevidence trend light ness Giant Scaleeven though carries dual airborne system paint scheme authentic Eloy about model early 1984 issues Model Builder magazine Bionic Bat right its first flight Kremer Speed prize flew 1500-meter triangular course roughly 2Y2 mm Permitted 10-mm preflight period during pilot can store energy assist pedaling flight An Astro 40 wound generator pedaled charge 3-lb Ni-Cd pack two Astro 40s contributed propulsion claim prize denied because battery wasnt flat starteven though plane landed charge start MacCready team planning tries may well have won prize before issue reaches readers AeroVironment photo close-up left Bionic Bat plane evidently still development supplied Astros Bob Boucher answers riddle pusher prop installed boom supporting tail sur faces blade configuration theoretical ideal may worth copying large Rubber models geared Electrics big proDs nice two-tube receiver gas-filled RK-61 tube developed Ed Lorenz already pioneered first super-small lightweight single-tuber also RK-61 led Berkeleys Aerotrol miniature British Hivac tube fiendish device Reeds com ing followed proportional days witchcraft about over single tube idled no 15 mils signal dropped 2 3 doing operated relay between 8 Ll activated infamous escapement Eds twotuber idled first tube 2 mils signal triggered second tube now relay tube 25 mils gave authority relaywhich previously loved dance vibration driving escapement model pilot crazy two-tuber got around terrible Continued page 22 What can Telemaster two unique examples snapped H Thomas last years Petit Jean Jumbo Fly-In Left black four-engine ship three-blade props has OS 25s popular multi fliers twin tail pointed nosel Wing integral nacelles straps generous rubber flew finehad great sound Right Ford Trimotor note lovely Commodore ignition Super Cyke foreground flying fantasy performed well 40 noseand dummy windmilling outboard props Two stellar attractions last years Electric Fly Pennsylvania Kim Smith left shows off Ellis Grumers Smith Miniplane Astro Cobalt 15 reduction drivel6cellsof 550 mAh capacity 13-B prop Right Shag Ill hydro wheels held builder Nelson Whit man has Astro Cobalt 15 twelve 12 Ah cells 8-4 prop Pics Herb Dirks May1984 21 limitation single-tuber because gas-filled tubes gave up ghost nothing flat idled 15 mils cost $3 after war few modelers such money Vinces letter Warp 4 stuff Says mention Ed Lorenz John Worth same Control Re search triggered 1949/50 John three other partners gels can dance head pin Ed myself Dick dont remember last name Dick broke ties 1950 1 backed out 1951 Ed wound up firms affairs July 1983 started talk ing about Wakefields Ron Warring Bob Copland etc sent looking up some memorabiliathought readers might like share Author need know Vince wife emigrated England 1947 Ed Bentleys witness acquired citizenship 1954 'During war years England~ Vince recalls new flying sport introducedRound-the-Pole RTP door flying radius 6 ft permis sible around pole thus allowing sport flying average room Clubs competed month mailed times duration SMAE monthly winning times 45-60-sec mark Vince goes decided go out something outstandinga semiscale low wing weighing 5 oz slightly less 5 oz rubber Class slighly over 5 oz rubber Class B two -oz loops rubber geared together l-to-l geared 2-to-i faster-turning propel ler prop automatic variablepitch affair started high pitch went finer pitch progressively torque diminished model set new duration mark 2 mm 22 sec stood until super-duration de sign came Bob Copland low wing later won several speed contests After converting 300 sq Rubber job RC 1949/50 help Lorenz installed early singletuber four-arm escapement Vince became photographer migrated full-size aeronautics Lockheed Burbank spent 25 years Li aison Engineering corresponded Don Dickerson develop ing B&D proportional system about 20 years ago author others flew B&D systemwhich hernia-threatening hand-held transmitter Dons system contem porary Zel Ritchies California latter first brick produced 1956 big brick cause housed servos same case massive receiver Called Space Control later became Orbits first attempt proportional radio 22 Model Aviation WITH FEATURES YOU THE MODELER WANTED Ritchie priced $600 trade show Grand Rapids asked Hal d eBolt any6ne would buy anything expensiveat least $1500 todays dollarsand said Oh theyll buy airight Bentley added fourth chan nel B&D unflown ship VK cabin given Tony Addie Nacarrato Hobby Lobby says Vince pass some deserving youngster Vince spent 18 years fooling live steamstill getting back RC wish could fly darn things laments Vince met Ray Ardn can tell Ray flown gas-powered FF across Van Courtland Park New York City 1904 1904 correct mar ried girl feet landed known modelers worldwide development glow plug 1947and wonderful postwar Arden 09 19 interviewed Ray about time Candlewood Lake home north west Connecticut Before war designed famous Atom 09 Lou Garami working Polks Seventh Ave NYC two floors up almost opposite Penn Station brought national attention published designs especially Strato-Streak Ray Arden made other engines now hear about possibly first time designed tie tacks ran Ray no photos interviewed him Vince seems beaten punch 1948 now Vinces permission privileged show long lost photos remarkable engines virtually no knew existed thought Cox 010 miracle Spook stuff Like other creaky guys have through twin-pushers ROGs gas engines FF Gas CL RC rudder-only whistles-and-bells Scale new worthwhile tech nical development relished dont need Electrified dig discussion X design Weve Astro Hogs Astro this-and thats call Astro Spook Bob Boucher Astro Flight tickled pink name because ship mo tivated Astro Cobalt 05 refers geared big-prop floaters Win ter Syndrome although sells plenty reduction-drive systems both geared belt lovely things please Free Flight soulbut challenged says guys want raw power Can have best two worlds design three-view obviously can powered glow engine weli What different about theme model think unit unit can enlarged provide three basic sizes both glow Continued page 24 High film strength lubricant increased power long engine life Detergents cut performance robbing varnish Highest quality ingredients insure top engine performance reliability Gal Price Drum Price TypeNitro 0/0LubricantFreight PaidFreight-Collect FAI0%Synthetic $ 675 995 5s5%Synthetic $ 775 995 ScS0/oCastor $ 775 995 4cyI7%Castor $ 850 995 lOs10%Synthetic $ 895 995 lOc10%Castor $ 895 995 RIG12%Syn & Castor $ 995 95 iSs15%Synthetic $ 995 995 20c20%Castor 5 95 25s25%Synthetic 5 95 4040%15 Syn-5 Castor 5 95 5050%Synthetic 5 95 6060%Synthetic 5 95 C centlaunus US EXCEPT 54 GAL DRUMS MINIMUM ORDER 4 Gal Asst OK DISCOUNTS 24 63 Gal Deduct 50/a Asstd OK 64 Gal Orders Deduct 100/a Asstd OK SHELDONS Hours HOBBY SHOP Mon-Wed Fri & Sat 3157 Alum Rock Avenue -530 San Jose95127 Thur 930-900 M/C VISA CaliforniaSun 1200-500 UPS COD sis408 2514787 VIJLTMATEFI Voitmaster very precisely measures transmitter receiver battery voltage under load determine whether battery reaching discharged state Green yellow red scales indicate go-caution-no go situation unique features include four voltage ranges including 1 2V starter batteries Load Engage switch monitor recovery rate cells important parameter deter mining cell condition plus Load Status switch two different loads 200 ma 500 ma can engaged large packs 0 mah up mon itored validity Less connectors 26K18Voltmaster Kit$2495 26K 18CVoltmaster Assembled$2995 Send $200 complete catalog Ace items available ACE dealer must order direct add $100 handlingfaeP0 BO511E HIGGIIJ5vILLE MO 64037 816484-7121 May 1984 23 WINNERS Flat platinum coil element Ceramic core Idle Bar Idle cap Send SIOO catalogue ox 31228 Indpls IN 46231 electric-powered sport Electric see 035 right-on 05 075 direct drive mid-sized brother 15s 25s both geared direct big brother 25s 40s glow can 049s 09s 15s 20s perhaps 25s 30s 40s size can have wing cut off tip-bay extended what see soar ing adding bay yields nine versions Naturally wood sizes would beefier glow Bob wanted go 300 sq aileroned high-performance aerobatic thing Im hot pilot compromised 356 sq Cut off tip wish wanted good glide perhaps bit hard-bought soar ing rd need design trick book could fly safely ever get away powered gliders conservative high wings must able duplicate glow engine de signs see Thus low wing Ive always impressed ap pearance performance Don Srulls Rubber Scale model Hem kel fighter produced kit Flyline Models swept-forward trailing edges give aggressive appearance make design difficult minimum-area model ailerons scare Low dragrequires thin wing area shown tip rib model thinner drawn three-view fa miliar center-section flap Top Flites Contender especially poly version know much ship can slowed Like bobbing around top rubber ball Small crements flap proportional could boost lift needed slowed ap proaches flap close touch-down 2 3 deg flap carried tremendous washout effect insurance against snap An optional swept leading edge geom etry showna la theZlin DC-3 AT-6 etc Because washout rear ward-swept version would stable around stall safer - awkward attitudes less proficient piloting save weight small version no rudder used although rudder hinge line shown should wish swept-back rudder hinge line has sub stantial effect holding up inside wing turning small ver sion four servos would required rudder due flaps have three relying ailerons turn roll smooth aileron turns cant afford down-aileron yaw effects vertical tail must large enough pre vent yaw fighting against smooth turns maximum roll-axis stability tips washed-out slightly inclining aileron spar up tip during 24 Model Aviation L5 K construction aft tip section sanded beneath yield stable tip airfoilthus still washout addition center section leading edge rounded lines extreme leading edge descending tip rib washout tip rib flat board no Phillips entry small ships motor battery con sumes much internal space difficult cool case mishap cells become battery ram have quickly-detachable simulated radiator tunnel small version will take either six seven sub-C cells 05 five 800 mAh cells 035easily shifted balancing battery can pop out front fixed tunnel little no harm being done bigger versions twin tunnels located outward center would accommodate twin six-packs tunnels can eliminated favor side scoops jet-fighter style side view profile configuration minimizes diving turns spiraling side area front high rear low Fuselage flat-bottomed top swept down tail Vertical tail height limited tall tails produce ex cess leverage around rolling axis tendency cone glide-turn trims Much vertical tail area below centerline As Pattern need high profile area forward tall canopy made foam bit knife-edge-holding effect keep CG low possibleanother reason tunnel-batterythe flap aileron servos mounted flat line inside wing center section forward main spars other aft Probably six sub-Cs good begin ning point since ship clean 7-5 wood prop could better traditional 7-4 plastic all-up weight should fall between 30 35 oz fuselage seems long reflexes dont permit jackrabbit responses fingers crossed See-through magic Only Charles Dick ens could plot course item Lets begin stunning shot Bionic Bat taken last September 25 during first its two qualifying flights Shafter CA Kremer Speed Prizeto awarded achiev ing average speed 20 mph around 1500-meter triangular course two turning points 750 ters apart triangle otherwise variable Required fly course opposite directions Bionic Bat Bi onic muscle power Bat bat tery used store air crews energy during 1 0-mm period prior takeoff employed case power two I special Astro 40s assisted ped aling pilot making its second pass two Continued page 26 Heres Why. new Zero think youre going like model First its simple common-sense construction will get out workshop onto flying field sooner can really appreciate model Its large size 79 span 90 120 power gives realism stability flight smaller models cant begin match Its total accuracy scale has already made award winner highest Scale Masters static score ever awarded 985 Pilots Choice trophy 1983 excellent choice RC modeler looking step up truly impressive scale model Find out about new Zero other beautiful 1/5 scale models Call write catalog LE1ave iIatt ivuodels inc 6940 NW 15th st1 Plantation FIa 33313 Phone 305 501-4861 02810Mb IJ IJ3fl Butt fif Astounding realism attainabie plastics Very light weight discriminating hobbiest. Either Pilot version kit.. Sportsman Barnstormer.. Darn Good Airmen .. complete NEW LOW PRICES Scale $595 1/4 Scale $795 1/3 Scale 142 May 1984 25 See Deaier add Dollar direct order handiingI 0 The POWR ZOOM winch serious flyer 14 demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplaneXgJL choose speed select pulleys launchaminute flights use companion RETRIEVER MFG OF NI-STARTER $2995 Charger PLEASE SPECIFY WHICH CHARGER WHEN ORDERING DAVEY ICORPORATION SYSTEMS ONE WOOD ANEMALVERNPA19355 215644-0692 Write call information TORK-STARTER revolutionary concept power 15V glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/tO charger has LED indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment raceive free shiopinci handlinci YORK-STARTER $2995 Chargar 11 OV 220V 1 2V Fast Charter $2095 Without Charger CHARGERS $1295 Charger Only 1 1OV 220V 12V Fant Charger 301 464-2260 Send $1 Complete Catalog kits aCCessones Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 26 Model Aviation days later September 27 thought have won Paul Mac Cready-headed bunch prize about $30000 time record initial prizewinner broken other contenders additional prizes about $7500 will awarded until fund about $150000 depleted Editor formation received after column written indicates Royal Aeronautical Society has turned down Human Power Speed claim September 25/2 7 Mac Cready group turn-down due starting non-flat batteryeven though charge battery after attempt before Piloted MacCreadys son Parker 45-ft 84-lb Bionic Bat flew course 2 mm 39 sec 2 mm 35 sec 10-mm energy storage achieved pedaling third Astro 40 especially wound generator charge 3-lb Ni-Cd battery pack Al though carried man could con sider machine big model airplane fact weighs roughly half gross number Giant Scale models have flown successful ly sort thing Bob Campbell might build interested duration Indeed would make ideal electric-powered model Bob Boucher tells us prop re volved 250 rpm dont know gear-down ratio earlier Mac Cready machines did have energy assistance depending pedal ing alone props up 12-ft dia turned 1 00-to-l reduction speed flight safe say its some what faster-turning airscrew smaller diameter could build rather big model Bionic Bat almost anything 02 up doubt ful could built big enough require 40 modelers Bionic Bat spec ulative bonanza will note long prop spinner fact tail surfaces mounted thin boom close-up plc ture prop Bob Boucher Consultant Supplier GeneratorBattery-Motor electrical systems evi dently earlier test craft either re placed intensely modified shows prop hub attached long bearing-like concentric tube re volves boom What appears large ailerons three-axis controllable mount well inboard polydihedral break configuration tapered uptilted tip panels seems bit like winglets deed slow airspeeds angle inclination winglet may consid erably less angle see Learjets etc Like Free Flighters often speculate flight perform ance polydihedral panels because Continued page 28 plus shipping VISA MASTERCARD source QUIET FLIGHT supplies hi-starts accessorieselectric motors & reducers batteriescbutes braided nylon Iinetow lIne drums 12721 HASKELL LANE BOWIE MARYLAND 20716 JSPARROWHAWK1 1/32 SCALE PLASTIC MODEL KIT US Navy Sparrowhawks operated two dirigibles aircraft Carrier uuriIiy tile uS among Colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monotilament rigging U Detailed interior 21488 ClOUD WAY HAYWARD CA 94545 783-4868 28 Model Aviation 47 seem impart something special affect glide-turn characteristics Unexplained what could narrow-chord surfaces trailing edge tipand white blob could well Hoerner-varia tion tip trick light Bionic Bat level flight photo little things become intrigu ing man ground holding wind direction indicator two streamers probably Mylar reveal modest component head cross wind thrust line obviously zero tail boom wing may set slight incidence respect boom hence thrust line all-flying stabilizer tilted up about 5 6 deg pilot has posi tioned Bob Boucher tipped story last September sent scrawled notes some fascinating close-ups prop chain-drive system months went chased loose ends Astro Flight also supplied magic propulsion system Gossamer Penguin 1980 became first airplane history fly direct power sun solar cells 1981 solar-powered Solar Challenger flew 163 miles Paris England altitude 11000 ft Astro 40s translated energy propulsive force big props ticked over like Indoor Rubber stuff remind Gossamer Con dor purely man-powered won first Kremer prize fuel-less flight 1977 craft National Air & Space Museum 1979 Gossamer Albatross won another Kremer prize human-powered flight scross En glish Channel plane Lon don Science Museum Paul MacCready well-known modeler Bob Boucher take great pleasure effects full-scale aviation books Inc magazine growing companies released No vember its annual selection Americas 500 Fastest Growing Private Companies ranked according percentage sales increase fiscal 1978 through fiscal 1983 No 269 Gorham Model Products model Helicopter people boggles mind doesnt inclined think monster cor porations note words Private ly Owned doesnt mean firms have thousands employees al though some might Gorhams own press release proudly tells us company employs 12 full-time office factory personnel uses services 35 Ameri can companies subcontractors manufacturing process its Helicop ters sale popular Cricket given nearing 10000 kits Thats Continued page 13S 01 VOlta01008 O8O Fun/Winter Continued page 28 modest figure still lot choppers modeling world have others course including rotor span 10 ft Army An other requirement magazine s selection sales above $100000 less $15000000 drone connection Although first patented remotely-piloted vehicle drone dated WW days until WW II RPVs became practical part military hardware mainly lifelike targets Things like OQ2A remembered modelers later full-scale all-wood Culver Ca det About 12 ft span generous dihedral OQ2A powered Mc Culloch engine Ive told thing 5 10 hp up 18 looked like overblown Outdoor Rub ber job flat-topped triangular cross-sectioned fuselage thing catapulted shock cord off long launcher open-frame tubular con struction could hit 175 retrieval hit shut down engine popped chute top hatch first Mirror Meet 1947 Grummans Bethpage Long Island Army demonstrated three Wild man shot vertically over head heard did see thunderous impact concrete runway under Good Humor truck As Free Flight er knew what expect An other tore up sky until pilot goofed radio glitched demolish ing chicken coop its feathered habitants So heres Warren Anderson started Ohlsson 23 FF Gas jobs before WW II military assignments writes crew chief Radio Airplane Target Detachment flying OQ 2A drones first crew trained Army personnel Fort Bliss TX 1943 related us Good brothers taken RC idea several military units unable stir up much interest Finally US Cavalry accepted idea ac cording developed OQ2A wonder what Walt Good has say about Reginald Denny involved early manufacturing plane Mr Smith pointed out article merican Aircraft Modeler March 1971 picture took Radioplane plant 1943 shows both Smith Denny Reginald Denny handsome movie actor considerable fame truly good guy aviation Im going check out believe Reginald pilot interested air schools certainly major model airplane manufacturer advertised heavily mags grand FF Gas model kit Dennyplane fondly-re membered engine Dennymite Dennyplane famous day round-nosed aluminum cowl highwinged cabin model flew superb ly gosh looked like full-size plane lot people recent years have built thanks Doc Mathews revival January 1977 Model Aviation Plan No 169 $4 Power 19 25 Denny far cellu loid hero us Youll love Dennyplane Incidentally Radioplane produced 13935 drones under three designations Bill Winter 4426 Altura Ct Fairfax VA 22030 Cavalier/Laycock Continued oaoe 37 Epoxy balsa blocks place engine cowl Shape sand final contour keep very sharp chisel handy shaping carving balsa find faster using razor blades knife Use chisel carve close final size finish sanding Add gussets windshield side windows affixed contact cement engine compartment given two coats epoxy paint little tricky paint around engine mount used long cotton swab inserted through drain Continued page 138 May1984 135
Edition: Model Aviation - 1984/05
Page Numbers: 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 135
FIVE MINUTES AGO bellyaching temperature bone-chilling snow about superheated summer 1983 falling resolution made Now write shortly after New involuntary stay away epoxy Years Daythe low sky lead gray the past five years Ive increas During 1948 Vince Bentley obtained three amazing photos Ray Arden Vince believes Ray designed after Atom 09 Bill Winter remembers lrv Polk talking about somebodys miniature engines before Atom produced Poiks tiny Free Flight held Arden model would ROG ice front yard lake tiny square hole spinner accepted ratcheted starter Ray spun between forefinger thumb three engines appear different Two ob viously spark ignition note timer ad vance arms Two have underslung tanks different No tank visible the model engine could have glowl No spark-ignition points visible Props turn clockwise appears lami nated small engines paper match much longer inch ing sensitivity whiff produces angry welts itching lasts months did resolve fly year want fly Electric high-per formance fighter-like thing flaps cobalt direct-drive 05and some ultimate efficient thing yet paper will run 13-min-plus perhaps attain total duration 15 1 8 mm thermal assistance using reduction setup huge fold ing fan have five glow-powered slow ships soaring ability shy either radio engine Two Giant Scale jobs roost rafters up Long Island retread guy cant cope such giants guys will buy van Ill reconsider Ever hang 10-ft monsters shop have battered Kadet fun Eaglet will have Enya 40 fourcycle Eagle springwith flaps big Krackerjac spoilers study procrastinated maintenance Theres Midwest Sniffer Astro 035 elec tric motor get too confused will fly nearby school yard until sort things out What else Oh yes Farman 400 Scale project shared Bill Kaluf Its tail-dragger no-dihedral can tilever wing huge flaps OS 40 four-cycle have rubber-powered Lincoln monoplane mind Rub ber power isnt peculiar Flying Models magazine sold over 800 plans year Srulls Shinden canard Only rare RC ships surpass Theres rud der-only throttle 22-year-old make-beheve Airknocker repub lished April Flying Models first printed 1963 Its wheels almost shapeless blobs pocked rubber treads long gone engine Enya lapped 09 also over 20 years old high-tech engines bite dust soon have Wankel engine havent yet figured out what rack mysterious wings tells have other ships hidden somewhere should trash can see dont want face up writing Too much talk about ship have 10 stories tell cat asleep foot-high mound photos Im asleep top Hermes just told editor de mand entire magazine remminds bad would nothing write about Four-cycle engines lost flying sites U jUSt fun Bill Winter U preoccupy Three years ago mesmerized first four-cycle heard run Andrews Aeromaster 05 60 yielded kind per formance old-timers dreamed about since someone named Feeney produced four-cycle briefly during war never saw Now fourcycles everywhere Oddly exception AMA PR Departments Doug Pratt four-cycles few far between huge local club Doug kid behind ice cream counter whomping out everything gliders Coverite Gee Bees scads kits gaggles RTFs Electrics now Giant Scale drag Pratt along nearby sites sits folding chair flies back forth extreme distances usually about 45 mm After such ses sion found antenna Adcom receiver unwrapped identify two planes son Mike started RC began hA-powered Gentle Lady Top Flite Metrick latter slip pery got him try Air Scout Concept Models OS 15 1 liked enough urge Doug try Ace RC acquired Owen Kampen design reengineered simplicity Lite Ply sides Dougs moves out Saito 30 four-cycle turning big prop Mean Mike transferred after framing G-S Stinson design Bob Smurthwaite Pratt powered Saito 40 four-cycle Years ago G-S Stinson won RCMs Best Scale Year award Its too big has scale ribs etc seemingly quite heavy seen pictures Smurthwaites Stinson Howard flying floats nagging doubts use flaps properly ailerons slightly reflexed joy Doug has RAM lights includ ing strobe rudder tip running lights bright landing lights Touch5~OVTU~Z .kn&IQtIi~ CILsCCQLi15SULN CM T Sru_________ 1I$SVE2 CtEO FUSLGE0 IO0 UMR KlACk OPLANDS RTP MODEL 0 0M4 PROPOLLER_______________ RJLQR9O'LII L.2Li LENGTh 176 TOTAL WFIrwT top drawing 1946 issue British magazine Model Aircraft since discontinued Vince Bentleys Round-the-Pole speedster RTP flying craze England years capable 222 5 OL rubber two loops geared 11 geared prop 21 Noted Wakefielder Bob Copland quickly boosted RTP mark 4-plus mm illustrated model having microfilm covering single-wheel gear Drawings both models appeared same issue Coplands 10-in prop almost half 21%-in span Model weighed 5/8 oz Broken line outlining wing shows larger version broke 4% mm Flown 6-ft lines and-goes lights quite fly experience normally too dark Kaluf modernized RC Spe Winter thinks four-cycle engines real Silent Revolution hes intrigued sight Doug Pratt seated folding chair flying two ships back forth 45 mm long-legged flights planes interesting left G-S Stinson Saito 40 flaps work flawlessly picture-book landings rather high loading also has RAM strobe tail light tip lights landing lights glow brilliantly dusk other plane Air Scout designed Owen Kampen Concept Madels now kitted Ace Its Saito 30 heavy plane chugs along like lightplane cross countrytached 800850 rpm idle 8-6 Master Airacrew May1984 19 Taken Radiaplane plant 1943 Reginald Denny stands second right interna tional movie star Denny active aviation modeling Radioplane produced some 13000 early drones target practice ancestors todays sophisticated RPVs Denny remembered Dervnymite engine famous kit Dennyplane realistic fine-flying cabin plane revived Doc Mathews January 1977 MA Plan No 169 photo Warren Anderson AMA 1083 also license number NAA before AMA began Saito 30 Hobby Lobbys Klemm can landed tick-tick idle Dougs Saito 30 idles low 860 rpmOK dont believe 0S 40 four-cycle Farman four-cycles vastly underrated cial using 2 deg dihedral longer nose flaps ailerons chose 05 40 four-cycle turns 13-5 superb flier Kalufs redesigned RC Special will two-parter Aus tralian Airborne magazine also has 25/8djhedrol R/O 7/8for ailerons0 optional wing geometry K K__ LI [J L4 flop deflection ASTRO SPOOK Designed BILL WINTER WING SPANS 45 l/2 WING AREA 356 SO INS POWERASTRO FLIGHT 05 COBALT DIRECT PROP 7D X 4P fIap piece 0 0 Li Winters experimental low-winger direct-drive cobalt electric motor features ailerons/ elevator/shut-offand center-section flaps battery radiator tunnel low center gravity good cooling Theres much about design characteristics text turn big props large disk areas have great thrust burn fuel 50% less normal rate Since four-cycles quiet may answer noise problem Muffled Schnuerles have improved horrendous situation goes back years understand noise sound frequency annoys peopletheres nothing irritating whining Ive involved ongoing battle between people roughtly mile flying site guys fly park use strict muffler rules stern practices guys measure sound officials observing sound has measured area com plaints level lowerusing noisiest engine divethan passing truck several blocks away car start ing up three driveways equip ment park officials agreed complaints groundless 35 people signed petition threatened legal action Will public park organization want legal pursuit town citizens answer would seem obvious modelers now belatedly en courage four-cycle engines limit number planes simultaneously flight Consider engine sound measured mile away club flies five planes together club modelers rubbing salt wounds tagonists Forget lawnmowers passing freight trains full-size planes over headali means absolutely nothing us different sizes engines simultaneous flight doing aerobatics what sort sound frequen cies result Perhaps have noted AMA Contest Board has approved limit 124 cu four-cycle engines RC Pattern special meets fly-ins four-cycles Twilight zone am looking letter R Vince Bentley California Its hIc stationery Control Research Model Dvision found ad index magazine Thats because Control Research vanished early 195 Os its crowning achievement very 20 Model Aviation First class way Eloy Marezs CAP 20 confused 20L powered Kavan Twin spans 88 weighs less 20 lbevidence trend light ness Giant Scaleeven though carries dual airborne system paint scheme authentic Eloy about model early 1984 issues Model Builder magazine Bionic Bat right its first flight Kremer Speed prize flew 1500-meter triangular course roughly 2Y2 mm Permitted 10-mm preflight period during pilot can store energy assist pedaling flight An Astro 40 wound generator pedaled charge 3-lb Ni-Cd pack two Astro 40s contributed propulsion claim prize denied because battery wasnt flat starteven though plane landed charge start MacCready team planning tries may well have won prize before issue reaches readers AeroVironment photo close-up left Bionic Bat plane evidently still development supplied Astros Bob Boucher answers riddle pusher prop installed boom supporting tail sur faces blade configuration theoretical ideal may worth copying large Rubber models geared Electrics big proDs nice two-tube receiver gas-filled RK-61 tube developed Ed Lorenz already pioneered first super-small lightweight single-tuber also RK-61 led Berkeleys Aerotrol miniature British Hivac tube fiendish device Reeds com ing followed proportional days witchcraft about over single tube idled no 15 mils signal dropped 2 3 doing operated relay between 8 Ll activated infamous escapement Eds twotuber idled first tube 2 mils signal triggered second tube now relay tube 25 mils gave authority relaywhich previously loved dance vibration driving escapement model pilot crazy two-tuber got around terrible Continued page 22 What can Telemaster two unique examples snapped H Thomas last years Petit Jean Jumbo Fly-In Left black four-engine ship three-blade props has OS 25s popular multi fliers twin tail pointed nosel Wing integral nacelles straps generous rubber flew finehad great sound Right Ford Trimotor note lovely Commodore ignition Super Cyke foreground flying fantasy performed well 40 noseand dummy windmilling outboard props Two stellar attractions last years Electric Fly Pennsylvania Kim Smith left shows off Ellis Grumers Smith Miniplane Astro Cobalt 15 reduction drivel6cellsof 550 mAh capacity 13-B prop Right Shag Ill hydro wheels held builder Nelson Whit man has Astro Cobalt 15 twelve 12 Ah cells 8-4 prop Pics Herb Dirks May1984 21 limitation single-tuber because gas-filled tubes gave up ghost nothing flat idled 15 mils cost $3 after war few modelers such money Vinces letter Warp 4 stuff Says mention Ed Lorenz John Worth same Control Re search triggered 1949/50 John three other partners gels can dance head pin Ed myself Dick dont remember last name Dick broke ties 1950 1 backed out 1951 Ed wound up firms affairs July 1983 started talk ing about Wakefields Ron Warring Bob Copland etc sent looking up some memorabiliathought readers might like share Author need know Vince wife emigrated England 1947 Ed Bentleys witness acquired citizenship 1954 'During war years England~ Vince recalls new flying sport introducedRound-the-Pole RTP door flying radius 6 ft permis sible around pole thus allowing sport flying average room Clubs competed month mailed times duration SMAE monthly winning times 45-60-sec mark Vince goes decided go out something outstandinga semiscale low wing weighing 5 oz slightly less 5 oz rubber Class slighly over 5 oz rubber Class B two -oz loops rubber geared together l-to-l geared 2-to-i faster-turning propel ler prop automatic variablepitch affair started high pitch went finer pitch progressively torque diminished model set new duration mark 2 mm 22 sec stood until super-duration de sign came Bob Copland low wing later won several speed contests After converting 300 sq Rubber job RC 1949/50 help Lorenz installed early singletuber four-arm escapement Vince became photographer migrated full-size aeronautics Lockheed Burbank spent 25 years Li aison Engineering corresponded Don Dickerson develop ing B&D proportional system about 20 years ago author others flew B&D systemwhich hernia-threatening hand-held transmitter Dons system contem porary Zel Ritchies California latter first brick produced 1956 big brick cause housed servos same case massive receiver Called Space Control later became Orbits first attempt proportional radio 22 Model Aviation WITH FEATURES YOU THE MODELER WANTED Ritchie priced $600 trade show Grand Rapids asked Hal d eBolt any6ne would buy anything expensiveat least $1500 todays dollarsand said Oh theyll buy airight Bentley added fourth chan nel B&D unflown ship VK cabin given Tony Addie Nacarrato Hobby Lobby says Vince pass some deserving youngster Vince spent 18 years fooling live steamstill getting back RC wish could fly darn things laments Vince met Ray Ardn can tell Ray flown gas-powered FF across Van Courtland Park New York City 1904 1904 correct mar ried girl feet landed known modelers worldwide development glow plug 1947and wonderful postwar Arden 09 19 interviewed Ray about time Candlewood Lake home north west Connecticut Before war designed famous Atom 09 Lou Garami working Polks Seventh Ave NYC two floors up almost opposite Penn Station brought national attention published designs especially Strato-Streak Ray Arden made other engines now hear about possibly first time designed tie tacks ran Ray no photos interviewed him Vince seems beaten punch 1948 now Vinces permission privileged show long lost photos remarkable engines virtually no knew existed thought Cox 010 miracle Spook stuff Like other creaky guys have through twin-pushers ROGs gas engines FF Gas CL RC rudder-only whistles-and-bells Scale new worthwhile tech nical development relished dont need Electrified dig discussion X design Weve Astro Hogs Astro this-and thats call Astro Spook Bob Boucher Astro Flight tickled pink name because ship mo tivated Astro Cobalt 05 refers geared big-prop floaters Win ter Syndrome although sells plenty reduction-drive systems both geared belt lovely things please Free Flight soulbut challenged says guys want raw power Can have best two worlds design three-view obviously can powered glow engine weli What different about theme model think unit unit can enlarged provide three basic sizes both glow Continued page 24 High film strength lubricant increased power long engine life Detergents cut performance robbing varnish Highest quality ingredients insure top engine performance reliability Gal Price Drum Price TypeNitro 0/0LubricantFreight PaidFreight-Collect FAI0%Synthetic $ 675 995 5s5%Synthetic $ 775 995 ScS0/oCastor $ 775 995 4cyI7%Castor $ 850 995 lOs10%Synthetic $ 895 995 lOc10%Castor $ 895 995 RIG12%Syn & Castor $ 995 95 iSs15%Synthetic $ 995 995 20c20%Castor 5 95 25s25%Synthetic 5 95 4040%15 Syn-5 Castor 5 95 5050%Synthetic 5 95 6060%Synthetic 5 95 C centlaunus US EXCEPT 54 GAL DRUMS MINIMUM ORDER 4 Gal Asst OK DISCOUNTS 24 63 Gal Deduct 50/a Asstd OK 64 Gal Orders Deduct 100/a Asstd OK SHELDONS Hours HOBBY SHOP Mon-Wed Fri & Sat 3157 Alum Rock Avenue -530 San Jose95127 Thur 930-900 M/C VISA CaliforniaSun 1200-500 UPS COD sis408 2514787 VIJLTMATEFI Voitmaster very precisely measures transmitter receiver battery voltage under load determine whether battery reaching discharged state Green yellow red scales indicate go-caution-no go situation unique features include four voltage ranges including 1 2V starter batteries Load Engage switch monitor recovery rate cells important parameter deter mining cell condition plus Load Status switch two different loads 200 ma 500 ma can engaged large packs 0 mah up mon itored validity Less connectors 26K18Voltmaster Kit$2495 26K 18CVoltmaster Assembled$2995 Send $200 complete catalog Ace items available ACE dealer must order direct add $100 handlingfaeP0 BO511E HIGGIIJ5vILLE MO 64037 816484-7121 May 1984 23 WINNERS Flat platinum coil element Ceramic core Idle Bar Idle cap Send SIOO catalogue ox 31228 Indpls IN 46231 electric-powered sport Electric see 035 right-on 05 075 direct drive mid-sized brother 15s 25s both geared direct big brother 25s 40s glow can 049s 09s 15s 20s perhaps 25s 30s 40s size can have wing cut off tip-bay extended what see soar ing adding bay yields nine versions Naturally wood sizes would beefier glow Bob wanted go 300 sq aileroned high-performance aerobatic thing Im hot pilot compromised 356 sq Cut off tip wish wanted good glide perhaps bit hard-bought soar ing rd need design trick book could fly safely ever get away powered gliders conservative high wings must able duplicate glow engine de signs see Thus low wing Ive always impressed ap pearance performance Don Srulls Rubber Scale model Hem kel fighter produced kit Flyline Models swept-forward trailing edges give aggressive appearance make design difficult minimum-area model ailerons scare Low dragrequires thin wing area shown tip rib model thinner drawn three-view fa miliar center-section flap Top Flites Contender especially poly version know much ship can slowed Like bobbing around top rubber ball Small crements flap proportional could boost lift needed slowed ap proaches flap close touch-down 2 3 deg flap carried tremendous washout effect insurance against snap An optional swept leading edge geom etry showna la theZlin DC-3 AT-6 etc Because washout rear ward-swept version would stable around stall safer - awkward attitudes less proficient piloting save weight small version no rudder used although rudder hinge line shown should wish swept-back rudder hinge line has sub stantial effect holding up inside wing turning small ver sion four servos would required rudder due flaps have three relying ailerons turn roll smooth aileron turns cant afford down-aileron yaw effects vertical tail must large enough pre vent yaw fighting against smooth turns maximum roll-axis stability tips washed-out slightly inclining aileron spar up tip during 24 Model Aviation L5 K construction aft tip section sanded beneath yield stable tip airfoilthus still washout addition center section leading edge rounded lines extreme leading edge descending tip rib washout tip rib flat board no Phillips entry small ships motor battery con sumes much internal space difficult cool case mishap cells become battery ram have quickly-detachable simulated radiator tunnel small version will take either six seven sub-C cells 05 five 800 mAh cells 035easily shifted balancing battery can pop out front fixed tunnel little no harm being done bigger versions twin tunnels located outward center would accommodate twin six-packs tunnels can eliminated favor side scoops jet-fighter style side view profile configuration minimizes diving turns spiraling side area front high rear low Fuselage flat-bottomed top swept down tail Vertical tail height limited tall tails produce ex cess leverage around rolling axis tendency cone glide-turn trims Much vertical tail area below centerline As Pattern need high profile area forward tall canopy made foam bit knife-edge-holding effect keep CG low possibleanother reason tunnel-batterythe flap aileron servos mounted flat line inside wing center section forward main spars other aft Probably six sub-Cs good begin ning point since ship clean 7-5 wood prop could better traditional 7-4 plastic all-up weight should fall between 30 35 oz fuselage seems long reflexes dont permit jackrabbit responses fingers crossed See-through magic Only Charles Dick ens could plot course item Lets begin stunning shot Bionic Bat taken last September 25 during first its two qualifying flights Shafter CA Kremer Speed Prizeto awarded achiev ing average speed 20 mph around 1500-meter triangular course two turning points 750 ters apart triangle otherwise variable Required fly course opposite directions Bionic Bat Bi onic muscle power Bat bat tery used store air crews energy during 1 0-mm period prior takeoff employed case power two I special Astro 40s assisted ped aling pilot making its second pass two Continued page 26 Heres Why. new Zero think youre going like model First its simple common-sense construction will get out workshop onto flying field sooner can really appreciate model Its large size 79 span 90 120 power gives realism stability flight smaller models cant begin match Its total accuracy scale has already made award winner highest Scale Masters static score ever awarded 985 Pilots Choice trophy 1983 excellent choice RC modeler looking step up truly impressive scale model Find out about new Zero other beautiful 1/5 scale models Call write catalog LE1ave iIatt ivuodels inc 6940 NW 15th st1 Plantation FIa 33313 Phone 305 501-4861 02810Mb IJ IJ3fl Butt fif Astounding realism attainabie plastics Very light weight discriminating hobbiest. Either Pilot version kit.. Sportsman Barnstormer.. Darn Good Airmen .. complete NEW LOW PRICES Scale $595 1/4 Scale $795 1/3 Scale 142 May 1984 25 See Deaier add Dollar direct order handiingI 0 The POWR ZOOM winch serious flyer 14 demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplaneXgJL choose speed select pulleys launchaminute flights use companion RETRIEVER MFG OF NI-STARTER $2995 Charger PLEASE SPECIFY WHICH CHARGER WHEN ORDERING DAVEY ICORPORATION SYSTEMS ONE WOOD ANEMALVERNPA19355 215644-0692 Write call information TORK-STARTER revolutionary concept power 15V glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/tO charger has LED indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment raceive free shiopinci handlinci YORK-STARTER $2995 Chargar 11 OV 220V 1 2V Fast Charter $2095 Without Charger CHARGERS $1295 Charger Only 1 1OV 220V 12V Fant Charger 301 464-2260 Send $1 Complete Catalog kits aCCessones Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 26 Model Aviation days later September 27 thought have won Paul Mac Cready-headed bunch prize about $30000 time record initial prizewinner broken other contenders additional prizes about $7500 will awarded until fund about $150000 depleted Editor formation received after column written indicates Royal Aeronautical Society has turned down Human Power Speed claim September 25/2 7 Mac Cready group turn-down due starting non-flat batteryeven though charge battery after attempt before Piloted MacCreadys son Parker 45-ft 84-lb Bionic Bat flew course 2 mm 39 sec 2 mm 35 sec 10-mm energy storage achieved pedaling third Astro 40 especially wound generator charge 3-lb Ni-Cd battery pack Al though carried man could con sider machine big model airplane fact weighs roughly half gross number Giant Scale models have flown successful ly sort thing Bob Campbell might build interested duration Indeed would make ideal electric-powered model Bob Boucher tells us prop re volved 250 rpm dont know gear-down ratio earlier Mac Cready machines did have energy assistance depending pedal ing alone props up 12-ft dia turned 1 00-to-l reduction speed flight safe say its some what faster-turning airscrew smaller diameter could build rather big model Bionic Bat almost anything 02 up doubt ful could built big enough require 40 modelers Bionic Bat spec ulative bonanza will note long prop spinner fact tail surfaces mounted thin boom close-up plc ture prop Bob Boucher Consultant Supplier GeneratorBattery-Motor electrical systems evi dently earlier test craft either re placed intensely modified shows prop hub attached long bearing-like concentric tube re volves boom What appears large ailerons three-axis controllable mount well inboard polydihedral break configuration tapered uptilted tip panels seems bit like winglets deed slow airspeeds angle inclination winglet may consid erably less angle see Learjets etc Like Free Flighters often speculate flight perform ance polydihedral panels because Continued page 28 plus shipping VISA MASTERCARD source QUIET FLIGHT supplies hi-starts accessorieselectric motors & reducers batteriescbutes braided nylon Iinetow lIne drums 12721 HASKELL LANE BOWIE MARYLAND 20716 JSPARROWHAWK1 1/32 SCALE PLASTIC MODEL KIT US Navy Sparrowhawks operated two dirigibles aircraft Carrier uuriIiy tile uS among Colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monotilament rigging U Detailed interior 21488 ClOUD WAY HAYWARD CA 94545 783-4868 28 Model Aviation 47 seem impart something special affect glide-turn characteristics Unexplained what could narrow-chord surfaces trailing edge tipand white blob could well Hoerner-varia tion tip trick light Bionic Bat level flight photo little things become intrigu ing man ground holding wind direction indicator two streamers probably Mylar reveal modest component head cross wind thrust line obviously zero tail boom wing may set slight incidence respect boom hence thrust line all-flying stabilizer tilted up about 5 6 deg pilot has posi tioned Bob Boucher tipped story last September sent scrawled notes some fascinating close-ups prop chain-drive system months went chased loose ends Astro Flight also supplied magic propulsion system Gossamer Penguin 1980 became first airplane history fly direct power sun solar cells 1981 solar-powered Solar Challenger flew 163 miles Paris England altitude 11000 ft Astro 40s translated energy propulsive force big props ticked over like Indoor Rubber stuff remind Gossamer Con dor purely man-powered won first Kremer prize fuel-less flight 1977 craft National Air & Space Museum 1979 Gossamer Albatross won another Kremer prize human-powered flight scross En glish Channel plane Lon don Science Museum Paul MacCready well-known modeler Bob Boucher take great pleasure effects full-scale aviation books Inc magazine growing companies released No vember its annual selection Americas 500 Fastest Growing Private Companies ranked according percentage sales increase fiscal 1978 through fiscal 1983 No 269 Gorham Model Products model Helicopter people boggles mind doesnt inclined think monster cor porations note words Private ly Owned doesnt mean firms have thousands employees al though some might Gorhams own press release proudly tells us company employs 12 full-time office factory personnel uses services 35 Ameri can companies subcontractors manufacturing process its Helicop ters sale popular Cricket given nearing 10000 kits Thats Continued page 13S 01 VOlta01008 O8O Fun/Winter Continued page 28 modest figure still lot choppers modeling world have others course including rotor span 10 ft Army An other requirement magazine s selection sales above $100000 less $15000000 drone connection Although first patented remotely-piloted vehicle drone dated WW days until WW II RPVs became practical part military hardware mainly lifelike targets Things like OQ2A remembered modelers later full-scale all-wood Culver Ca det About 12 ft span generous dihedral OQ2A powered Mc Culloch engine Ive told thing 5 10 hp up 18 looked like overblown Outdoor Rub ber job flat-topped triangular cross-sectioned fuselage thing catapulted shock cord off long launcher open-frame tubular con struction could hit 175 retrieval hit shut down engine popped chute top hatch first Mirror Meet 1947 Grummans Bethpage Long Island Army demonstrated three Wild man shot vertically over head heard did see thunderous impact concrete runway under Good Humor truck As Free Flight er knew what expect An other tore up sky until pilot goofed radio glitched demolish ing chicken coop its feathered habitants So heres Warren Anderson started Ohlsson 23 FF Gas jobs before WW II military assignments writes crew chief Radio Airplane Target Detachment flying OQ 2A drones first crew trained Army personnel Fort Bliss TX 1943 related us Good brothers taken RC idea several military units unable stir up much interest Finally US Cavalry accepted idea ac cording developed OQ2A wonder what Walt Good has say about Reginald Denny involved early manufacturing plane Mr Smith pointed out article merican Aircraft Modeler March 1971 picture took Radioplane plant 1943 shows both Smith Denny Reginald Denny handsome movie actor considerable fame truly good guy aviation Im going check out believe Reginald pilot interested air schools certainly major model airplane manufacturer advertised heavily mags grand FF Gas model kit Dennyplane fondly-re membered engine Dennymite Dennyplane famous day round-nosed aluminum cowl highwinged cabin model flew superb ly gosh looked like full-size plane lot people recent years have built thanks Doc Mathews revival January 1977 Model Aviation Plan No 169 $4 Power 19 25 Denny far cellu loid hero us Youll love Dennyplane Incidentally Radioplane produced 13935 drones under three designations Bill Winter 4426 Altura Ct Fairfax VA 22030 Cavalier/Laycock Continued oaoe 37 Epoxy balsa blocks place engine cowl Shape sand final contour keep very sharp chisel handy shaping carving balsa find faster using razor blades knife Use chisel carve close final size finish sanding Add gussets windshield side windows affixed contact cement engine compartment given two coats epoxy paint little tricky paint around engine mount used long cotton swab inserted through drain Continued page 138 May1984 135
Edition: Model Aviation - 1984/05
Page Numbers: 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 135
FIVE MINUTES AGO bellyaching temperature bone-chilling snow about superheated summer 1983 falling resolution made Now write shortly after New involuntary stay away epoxy Years Daythe low sky lead gray the past five years Ive increas During 1948 Vince Bentley obtained three amazing photos Ray Arden Vince believes Ray designed after Atom 09 Bill Winter remembers lrv Polk talking about somebodys miniature engines before Atom produced Poiks tiny Free Flight held Arden model would ROG ice front yard lake tiny square hole spinner accepted ratcheted starter Ray spun between forefinger thumb three engines appear different Two ob viously spark ignition note timer ad vance arms Two have underslung tanks different No tank visible the model engine could have glowl No spark-ignition points visible Props turn clockwise appears lami nated small engines paper match much longer inch ing sensitivity whiff produces angry welts itching lasts months did resolve fly year want fly Electric high-per formance fighter-like thing flaps cobalt direct-drive 05and some ultimate efficient thing yet paper will run 13-min-plus perhaps attain total duration 15 1 8 mm thermal assistance using reduction setup huge fold ing fan have five glow-powered slow ships soaring ability shy either radio engine Two Giant Scale jobs roost rafters up Long Island retread guy cant cope such giants guys will buy van Ill reconsider Ever hang 10-ft monsters shop have battered Kadet fun Eaglet will have Enya 40 fourcycle Eagle springwith flaps big Krackerjac spoilers study procrastinated maintenance Theres Midwest Sniffer Astro 035 elec tric motor get too confused will fly nearby school yard until sort things out What else Oh yes Farman 400 Scale project shared Bill Kaluf Its tail-dragger no-dihedral can tilever wing huge flaps OS 40 four-cycle have rubber-powered Lincoln monoplane mind Rub ber power isnt peculiar Flying Models magazine sold over 800 plans year Srulls Shinden canard Only rare RC ships surpass Theres rud der-only throttle 22-year-old make-beheve Airknocker repub lished April Flying Models first printed 1963 Its wheels almost shapeless blobs pocked rubber treads long gone engine Enya lapped 09 also over 20 years old high-tech engines bite dust soon have Wankel engine havent yet figured out what rack mysterious wings tells have other ships hidden somewhere should trash can see dont want face up writing Too much talk about ship have 10 stories tell cat asleep foot-high mound photos Im asleep top Hermes just told editor de mand entire magazine remminds bad would nothing write about Four-cycle engines lost flying sites U jUSt fun Bill Winter U preoccupy Three years ago mesmerized first four-cycle heard run Andrews Aeromaster 05 60 yielded kind per formance old-timers dreamed about since someone named Feeney produced four-cycle briefly during war never saw Now fourcycles everywhere Oddly exception AMA PR Departments Doug Pratt four-cycles few far between huge local club Doug kid behind ice cream counter whomping out everything gliders Coverite Gee Bees scads kits gaggles RTFs Electrics now Giant Scale drag Pratt along nearby sites sits folding chair flies back forth extreme distances usually about 45 mm After such ses sion found antenna Adcom receiver unwrapped identify two planes son Mike started RC began hA-powered Gentle Lady Top Flite Metrick latter slip pery got him try Air Scout Concept Models OS 15 1 liked enough urge Doug try Ace RC acquired Owen Kampen design reengineered simplicity Lite Ply sides Dougs moves out Saito 30 four-cycle turning big prop Mean Mike transferred after framing G-S Stinson design Bob Smurthwaite Pratt powered Saito 40 four-cycle Years ago G-S Stinson won RCMs Best Scale Year award Its too big has scale ribs etc seemingly quite heavy seen pictures Smurthwaites Stinson Howard flying floats nagging doubts use flaps properly ailerons slightly reflexed joy Doug has RAM lights includ ing strobe rudder tip running lights bright landing lights Touch5~OVTU~Z .kn&IQtIi~ CILsCCQLi15SULN CM T Sru_________ 1I$SVE2 CtEO FUSLGE0 IO0 UMR KlACk OPLANDS RTP MODEL 0 0M4 PROPOLLER_______________ RJLQR9O'LII L.2Li LENGTh 176 TOTAL WFIrwT top drawing 1946 issue British magazine Model Aircraft since discontinued Vince Bentleys Round-the-Pole speedster RTP flying craze England years capable 222 5 OL rubber two loops geared 11 geared prop 21 Noted Wakefielder Bob Copland quickly boosted RTP mark 4-plus mm illustrated model having microfilm covering single-wheel gear Drawings both models appeared same issue Coplands 10-in prop almost half 21%-in span Model weighed 5/8 oz Broken line outlining wing shows larger version broke 4% mm Flown 6-ft lines and-goes lights quite fly experience normally too dark Kaluf modernized RC Spe Winter thinks four-cycle engines real Silent Revolution hes intrigued sight Doug Pratt seated folding chair flying two ships back forth 45 mm long-legged flights planes interesting left G-S Stinson Saito 40 flaps work flawlessly picture-book landings rather high loading also has RAM strobe tail light tip lights landing lights glow brilliantly dusk other plane Air Scout designed Owen Kampen Concept Madels now kitted Ace Its Saito 30 heavy plane chugs along like lightplane cross countrytached 800850 rpm idle 8-6 Master Airacrew May1984 19 Taken Radiaplane plant 1943 Reginald Denny stands second right interna tional movie star Denny active aviation modeling Radioplane produced some 13000 early drones target practice ancestors todays sophisticated RPVs Denny remembered Dervnymite engine famous kit Dennyplane realistic fine-flying cabin plane revived Doc Mathews January 1977 MA Plan No 169 photo Warren Anderson AMA 1083 also license number NAA before AMA began Saito 30 Hobby Lobbys Klemm can landed tick-tick idle Dougs Saito 30 idles low 860 rpmOK dont believe 0S 40 four-cycle Farman four-cycles vastly underrated cial using 2 deg dihedral longer nose flaps ailerons chose 05 40 four-cycle turns 13-5 superb flier Kalufs redesigned RC Special will two-parter Aus tralian Airborne magazine also has 25/8djhedrol R/O 7/8for ailerons0 optional wing geometry K K__ LI [J L4 flop deflection ASTRO SPOOK Designed BILL WINTER WING SPANS 45 l/2 WING AREA 356 SO INS POWERASTRO FLIGHT 05 COBALT DIRECT PROP 7D X 4P fIap piece 0 0 Li Winters experimental low-winger direct-drive cobalt electric motor features ailerons/ elevator/shut-offand center-section flaps battery radiator tunnel low center gravity good cooling Theres much about design characteristics text turn big props large disk areas have great thrust burn fuel 50% less normal rate Since four-cycles quiet may answer noise problem Muffled Schnuerles have improved horrendous situation goes back years understand noise sound frequency annoys peopletheres nothing irritating whining Ive involved ongoing battle between people roughtly mile flying site guys fly park use strict muffler rules stern practices guys measure sound officials observing sound has measured area com plaints level lowerusing noisiest engine divethan passing truck several blocks away car start ing up three driveways equip ment park officials agreed complaints groundless 35 people signed petition threatened legal action Will public park organization want legal pursuit town citizens answer would seem obvious modelers now belatedly en courage four-cycle engines limit number planes simultaneously flight Consider engine sound measured mile away club flies five planes together club modelers rubbing salt wounds tagonists Forget lawnmowers passing freight trains full-size planes over headali means absolutely nothing us different sizes engines simultaneous flight doing aerobatics what sort sound frequen cies result Perhaps have noted AMA Contest Board has approved limit 124 cu four-cycle engines RC Pattern special meets fly-ins four-cycles Twilight zone am looking letter R Vince Bentley California Its hIc stationery Control Research Model Dvision found ad index magazine Thats because Control Research vanished early 195 Os its crowning achievement very 20 Model Aviation First class way Eloy Marezs CAP 20 confused 20L powered Kavan Twin spans 88 weighs less 20 lbevidence trend light ness Giant Scaleeven though carries dual airborne system paint scheme authentic Eloy about model early 1984 issues Model Builder magazine Bionic Bat right its first flight Kremer Speed prize flew 1500-meter triangular course roughly 2Y2 mm Permitted 10-mm preflight period during pilot can store energy assist pedaling flight An Astro 40 wound generator pedaled charge 3-lb Ni-Cd pack two Astro 40s contributed propulsion claim prize denied because battery wasnt flat starteven though plane landed charge start MacCready team planning tries may well have won prize before issue reaches readers AeroVironment photo close-up left Bionic Bat plane evidently still development supplied Astros Bob Boucher answers riddle pusher prop installed boom supporting tail sur faces blade configuration theoretical ideal may worth copying large Rubber models geared Electrics big proDs nice two-tube receiver gas-filled RK-61 tube developed Ed Lorenz already pioneered first super-small lightweight single-tuber also RK-61 led Berkeleys Aerotrol miniature British Hivac tube fiendish device Reeds com ing followed proportional days witchcraft about over single tube idled no 15 mils signal dropped 2 3 doing operated relay between 8 Ll activated infamous escapement Eds twotuber idled first tube 2 mils signal triggered second tube now relay tube 25 mils gave authority relaywhich previously loved dance vibration driving escapement model pilot crazy two-tuber got around terrible Continued page 22 What can Telemaster two unique examples snapped H Thomas last years Petit Jean Jumbo Fly-In Left black four-engine ship three-blade props has OS 25s popular multi fliers twin tail pointed nosel Wing integral nacelles straps generous rubber flew finehad great sound Right Ford Trimotor note lovely Commodore ignition Super Cyke foreground flying fantasy performed well 40 noseand dummy windmilling outboard props Two stellar attractions last years Electric Fly Pennsylvania Kim Smith left shows off Ellis Grumers Smith Miniplane Astro Cobalt 15 reduction drivel6cellsof 550 mAh capacity 13-B prop Right Shag Ill hydro wheels held builder Nelson Whit man has Astro Cobalt 15 twelve 12 Ah cells 8-4 prop Pics Herb Dirks May1984 21 limitation single-tuber because gas-filled tubes gave up ghost nothing flat idled 15 mils cost $3 after war few modelers such money Vinces letter Warp 4 stuff Says mention Ed Lorenz John Worth same Control Re search triggered 1949/50 John three other partners gels can dance head pin Ed myself Dick dont remember last name Dick broke ties 1950 1 backed out 1951 Ed wound up firms affairs July 1983 started talk ing about Wakefields Ron Warring Bob Copland etc sent looking up some memorabiliathought readers might like share Author need know Vince wife emigrated England 1947 Ed Bentleys witness acquired citizenship 1954 'During war years England~ Vince recalls new flying sport introducedRound-the-Pole RTP door flying radius 6 ft permis sible around pole thus allowing sport flying average room Clubs competed month mailed times duration SMAE monthly winning times 45-60-sec mark Vince goes decided go out something outstandinga semiscale low wing weighing 5 oz slightly less 5 oz rubber Class slighly over 5 oz rubber Class B two -oz loops rubber geared together l-to-l geared 2-to-i faster-turning propel ler prop automatic variablepitch affair started high pitch went finer pitch progressively torque diminished model set new duration mark 2 mm 22 sec stood until super-duration de sign came Bob Copland low wing later won several speed contests After converting 300 sq Rubber job RC 1949/50 help Lorenz installed early singletuber four-arm escapement Vince became photographer migrated full-size aeronautics Lockheed Burbank spent 25 years Li aison Engineering corresponded Don Dickerson develop ing B&D proportional system about 20 years ago author others flew B&D systemwhich hernia-threatening hand-held transmitter Dons system contem porary Zel Ritchies California latter first brick produced 1956 big brick cause housed servos same case massive receiver Called Space Control later became Orbits first attempt proportional radio 22 Model Aviation WITH FEATURES YOU THE MODELER WANTED Ritchie priced $600 trade show Grand Rapids asked Hal d eBolt any6ne would buy anything expensiveat least $1500 todays dollarsand said Oh theyll buy airight Bentley added fourth chan nel B&D unflown ship VK cabin given Tony Addie Nacarrato Hobby Lobby says Vince pass some deserving youngster Vince spent 18 years fooling live steamstill getting back RC wish could fly darn things laments Vince met Ray Ardn can tell Ray flown gas-powered FF across Van Courtland Park New York City 1904 1904 correct mar ried girl feet landed known modelers worldwide development glow plug 1947and wonderful postwar Arden 09 19 interviewed Ray about time Candlewood Lake home north west Connecticut Before war designed famous Atom 09 Lou Garami working Polks Seventh Ave NYC two floors up almost opposite Penn Station brought national attention published designs especially Strato-Streak Ray Arden made other engines now hear about possibly first time designed tie tacks ran Ray no photos interviewed him Vince seems beaten punch 1948 now Vinces permission privileged show long lost photos remarkable engines virtually no knew existed thought Cox 010 miracle Spook stuff Like other creaky guys have through twin-pushers ROGs gas engines FF Gas CL RC rudder-only whistles-and-bells Scale new worthwhile tech nical development relished dont need Electrified dig discussion X design Weve Astro Hogs Astro this-and thats call Astro Spook Bob Boucher Astro Flight tickled pink name because ship mo tivated Astro Cobalt 05 refers geared big-prop floaters Win ter Syndrome although sells plenty reduction-drive systems both geared belt lovely things please Free Flight soulbut challenged says guys want raw power Can have best two worlds design three-view obviously can powered glow engine weli What different about theme model think unit unit can enlarged provide three basic sizes both glow Continued page 24 High film strength lubricant increased power long engine life Detergents cut performance robbing varnish Highest quality ingredients insure top engine performance reliability Gal Price Drum Price TypeNitro 0/0LubricantFreight PaidFreight-Collect FAI0%Synthetic $ 675 995 5s5%Synthetic $ 775 995 ScS0/oCastor $ 775 995 4cyI7%Castor $ 850 995 lOs10%Synthetic $ 895 995 lOc10%Castor $ 895 995 RIG12%Syn & Castor $ 995 95 iSs15%Synthetic $ 995 995 20c20%Castor 5 95 25s25%Synthetic 5 95 4040%15 Syn-5 Castor 5 95 5050%Synthetic 5 95 6060%Synthetic 5 95 C centlaunus US EXCEPT 54 GAL DRUMS MINIMUM ORDER 4 Gal Asst OK DISCOUNTS 24 63 Gal Deduct 50/a Asstd OK 64 Gal Orders Deduct 100/a Asstd OK SHELDONS Hours HOBBY SHOP Mon-Wed Fri & Sat 3157 Alum Rock Avenue -530 San Jose95127 Thur 930-900 M/C VISA CaliforniaSun 1200-500 UPS COD sis408 2514787 VIJLTMATEFI Voitmaster very precisely measures transmitter receiver battery voltage under load determine whether battery reaching discharged state Green yellow red scales indicate go-caution-no go situation unique features include four voltage ranges including 1 2V starter batteries Load Engage switch monitor recovery rate cells important parameter deter mining cell condition plus Load Status switch two different loads 200 ma 500 ma can engaged large packs 0 mah up mon itored validity Less connectors 26K18Voltmaster Kit$2495 26K 18CVoltmaster Assembled$2995 Send $200 complete catalog Ace items available ACE dealer must order direct add $100 handlingfaeP0 BO511E HIGGIIJ5vILLE MO 64037 816484-7121 May 1984 23 WINNERS Flat platinum coil element Ceramic core Idle Bar Idle cap Send SIOO catalogue ox 31228 Indpls IN 46231 electric-powered sport Electric see 035 right-on 05 075 direct drive mid-sized brother 15s 25s both geared direct big brother 25s 40s glow can 049s 09s 15s 20s perhaps 25s 30s 40s size can have wing cut off tip-bay extended what see soar ing adding bay yields nine versions Naturally wood sizes would beefier glow Bob wanted go 300 sq aileroned high-performance aerobatic thing Im hot pilot compromised 356 sq Cut off tip wish wanted good glide perhaps bit hard-bought soar ing rd need design trick book could fly safely ever get away powered gliders conservative high wings must able duplicate glow engine de signs see Thus low wing Ive always impressed ap pearance performance Don Srulls Rubber Scale model Hem kel fighter produced kit Flyline Models swept-forward trailing edges give aggressive appearance make design difficult minimum-area model ailerons scare Low dragrequires thin wing area shown tip rib model thinner drawn three-view fa miliar center-section flap Top Flites Contender especially poly version know much ship can slowed Like bobbing around top rubber ball Small crements flap proportional could boost lift needed slowed ap proaches flap close touch-down 2 3 deg flap carried tremendous washout effect insurance against snap An optional swept leading edge geom etry showna la theZlin DC-3 AT-6 etc Because washout rear ward-swept version would stable around stall safer - awkward attitudes less proficient piloting save weight small version no rudder used although rudder hinge line shown should wish swept-back rudder hinge line has sub stantial effect holding up inside wing turning small ver sion four servos would required rudder due flaps have three relying ailerons turn roll smooth aileron turns cant afford down-aileron yaw effects vertical tail must large enough pre vent yaw fighting against smooth turns maximum roll-axis stability tips washed-out slightly inclining aileron spar up tip during 24 Model Aviation L5 K construction aft tip section sanded beneath yield stable tip airfoilthus still washout addition center section leading edge rounded lines extreme leading edge descending tip rib washout tip rib flat board no Phillips entry small ships motor battery con sumes much internal space difficult cool case mishap cells become battery ram have quickly-detachable simulated radiator tunnel small version will take either six seven sub-C cells 05 five 800 mAh cells 035easily shifted balancing battery can pop out front fixed tunnel little no harm being done bigger versions twin tunnels located outward center would accommodate twin six-packs tunnels can eliminated favor side scoops jet-fighter style side view profile configuration minimizes diving turns spiraling side area front high rear low Fuselage flat-bottomed top swept down tail Vertical tail height limited tall tails produce ex cess leverage around rolling axis tendency cone glide-turn trims Much vertical tail area below centerline As Pattern need high profile area forward tall canopy made foam bit knife-edge-holding effect keep CG low possibleanother reason tunnel-batterythe flap aileron servos mounted flat line inside wing center section forward main spars other aft Probably six sub-Cs good begin ning point since ship clean 7-5 wood prop could better traditional 7-4 plastic all-up weight should fall between 30 35 oz fuselage seems long reflexes dont permit jackrabbit responses fingers crossed See-through magic Only Charles Dick ens could plot course item Lets begin stunning shot Bionic Bat taken last September 25 during first its two qualifying flights Shafter CA Kremer Speed Prizeto awarded achiev ing average speed 20 mph around 1500-meter triangular course two turning points 750 ters apart triangle otherwise variable Required fly course opposite directions Bionic Bat Bi onic muscle power Bat bat tery used store air crews energy during 1 0-mm period prior takeoff employed case power two I special Astro 40s assisted ped aling pilot making its second pass two Continued page 26 Heres Why. new Zero think youre going like model First its simple common-sense construction will get out workshop onto flying field sooner can really appreciate model Its large size 79 span 90 120 power gives realism stability flight smaller models cant begin match Its total accuracy scale has already made award winner highest Scale Masters static score ever awarded 985 Pilots Choice trophy 1983 excellent choice RC modeler looking step up truly impressive scale model Find out about new Zero other beautiful 1/5 scale models Call write catalog LE1ave iIatt ivuodels inc 6940 NW 15th st1 Plantation FIa 33313 Phone 305 501-4861 02810Mb IJ IJ3fl Butt fif Astounding realism attainabie plastics Very light weight discriminating hobbiest. Either Pilot version kit.. Sportsman Barnstormer.. Darn Good Airmen .. complete NEW LOW PRICES Scale $595 1/4 Scale $795 1/3 Scale 142 May 1984 25 See Deaier add Dollar direct order handiingI 0 The POWR ZOOM winch serious flyer 14 demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplaneXgJL choose speed select pulleys launchaminute flights use companion RETRIEVER MFG OF NI-STARTER $2995 Charger PLEASE SPECIFY WHICH CHARGER WHEN ORDERING DAVEY ICORPORATION SYSTEMS ONE WOOD ANEMALVERNPA19355 215644-0692 Write call information TORK-STARTER revolutionary concept power 15V glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/tO charger has LED indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment raceive free shiopinci handlinci YORK-STARTER $2995 Chargar 11 OV 220V 1 2V Fast Charter $2095 Without Charger CHARGERS $1295 Charger Only 1 1OV 220V 12V Fant Charger 301 464-2260 Send $1 Complete Catalog kits aCCessones Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 26 Model Aviation days later September 27 thought have won Paul Mac Cready-headed bunch prize about $30000 time record initial prizewinner broken other contenders additional prizes about $7500 will awarded until fund about $150000 depleted Editor formation received after column written indicates Royal Aeronautical Society has turned down Human Power Speed claim September 25/2 7 Mac Cready group turn-down due starting non-flat batteryeven though charge battery after attempt before Piloted MacCreadys son Parker 45-ft 84-lb Bionic Bat flew course 2 mm 39 sec 2 mm 35 sec 10-mm energy storage achieved pedaling third Astro 40 especially wound generator charge 3-lb Ni-Cd battery pack Al though carried man could con sider machine big model airplane fact weighs roughly half gross number Giant Scale models have flown successful ly sort thing Bob Campbell might build interested duration Indeed would make ideal electric-powered model Bob Boucher tells us prop re volved 250 rpm dont know gear-down ratio earlier Mac Cready machines did have energy assistance depending pedal ing alone props up 12-ft dia turned 1 00-to-l reduction speed flight safe say its some what faster-turning airscrew smaller diameter could build rather big model Bionic Bat almost anything 02 up doubt ful could built big enough require 40 modelers Bionic Bat spec ulative bonanza will note long prop spinner fact tail surfaces mounted thin boom close-up plc ture prop Bob Boucher Consultant Supplier GeneratorBattery-Motor electrical systems evi dently earlier test craft either re placed intensely modified shows prop hub attached long bearing-like concentric tube re volves boom What appears large ailerons three-axis controllable mount well inboard polydihedral break configuration tapered uptilted tip panels seems bit like winglets deed slow airspeeds angle inclination winglet may consid erably less angle see Learjets etc Like Free Flighters often speculate flight perform ance polydihedral panels because Continued page 28 plus shipping VISA MASTERCARD source QUIET FLIGHT supplies hi-starts accessorieselectric motors & reducers batteriescbutes braided nylon Iinetow lIne drums 12721 HASKELL LANE BOWIE MARYLAND 20716 JSPARROWHAWK1 1/32 SCALE PLASTIC MODEL KIT US Navy Sparrowhawks operated two dirigibles aircraft Carrier uuriIiy tile uS among Colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monotilament rigging U Detailed interior 21488 ClOUD WAY HAYWARD CA 94545 783-4868 28 Model Aviation 47 seem impart something special affect glide-turn characteristics Unexplained what could narrow-chord surfaces trailing edge tipand white blob could well Hoerner-varia tion tip trick light Bionic Bat level flight photo little things become intrigu ing man ground holding wind direction indicator two streamers probably Mylar reveal modest component head cross wind thrust line obviously zero tail boom wing may set slight incidence respect boom hence thrust line all-flying stabilizer tilted up about 5 6 deg pilot has posi tioned Bob Boucher tipped story last September sent scrawled notes some fascinating close-ups prop chain-drive system months went chased loose ends Astro Flight also supplied magic propulsion system Gossamer Penguin 1980 became first airplane history fly direct power sun solar cells 1981 solar-powered Solar Challenger flew 163 miles Paris England altitude 11000 ft Astro 40s translated energy propulsive force big props ticked over like Indoor Rubber stuff remind Gossamer Con dor purely man-powered won first Kremer prize fuel-less flight 1977 craft National Air & Space Museum 1979 Gossamer Albatross won another Kremer prize human-powered flight scross En glish Channel plane Lon don Science Museum Paul MacCready well-known modeler Bob Boucher take great pleasure effects full-scale aviation books Inc magazine growing companies released No vember its annual selection Americas 500 Fastest Growing Private Companies ranked according percentage sales increase fiscal 1978 through fiscal 1983 No 269 Gorham Model Products model Helicopter people boggles mind doesnt inclined think monster cor porations note words Private ly Owned doesnt mean firms have thousands employees al though some might Gorhams own press release proudly tells us company employs 12 full-time office factory personnel uses services 35 Ameri can companies subcontractors manufacturing process its Helicop ters sale popular Cricket given nearing 10000 kits Thats Continued page 13S 01 VOlta01008 O8O Fun/Winter Continued page 28 modest figure still lot choppers modeling world have others course including rotor span 10 ft Army An other requirement magazine s selection sales above $100000 less $15000000 drone connection Although first patented remotely-piloted vehicle drone dated WW days until WW II RPVs became practical part military hardware mainly lifelike targets Things like OQ2A remembered modelers later full-scale all-wood Culver Ca det About 12 ft span generous dihedral OQ2A powered Mc Culloch engine Ive told thing 5 10 hp up 18 looked like overblown Outdoor Rub ber job flat-topped triangular cross-sectioned fuselage thing catapulted shock cord off long launcher open-frame tubular con struction could hit 175 retrieval hit shut down engine popped chute top hatch first Mirror Meet 1947 Grummans Bethpage Long Island Army demonstrated three Wild man shot vertically over head heard did see thunderous impact concrete runway under Good Humor truck As Free Flight er knew what expect An other tore up sky until pilot goofed radio glitched demolish ing chicken coop its feathered habitants So heres Warren Anderson started Ohlsson 23 FF Gas jobs before WW II military assignments writes crew chief Radio Airplane Target Detachment flying OQ 2A drones first crew trained Army personnel Fort Bliss TX 1943 related us Good brothers taken RC idea several military units unable stir up much interest Finally US Cavalry accepted idea ac cording developed OQ2A wonder what Walt Good has say about Reginald Denny involved early manufacturing plane Mr Smith pointed out article merican Aircraft Modeler March 1971 picture took Radioplane plant 1943 shows both Smith Denny Reginald Denny handsome movie actor considerable fame truly good guy aviation Im going check out believe Reginald pilot interested air schools certainly major model airplane manufacturer advertised heavily mags grand FF Gas model kit Dennyplane fondly-re membered engine Dennymite Dennyplane famous day round-nosed aluminum cowl highwinged cabin model flew superb ly gosh looked like full-size plane lot people recent years have built thanks Doc Mathews revival January 1977 Model Aviation Plan No 169 $4 Power 19 25 Denny far cellu loid hero us Youll love Dennyplane Incidentally Radioplane produced 13935 drones under three designations Bill Winter 4426 Altura Ct Fairfax VA 22030 Cavalier/Laycock Continued oaoe 37 Epoxy balsa blocks place engine cowl Shape sand final contour keep very sharp chisel handy shaping carving balsa find faster using razor blades knife Use chisel carve close final size finish sanding Add gussets windshield side windows affixed contact cement engine compartment given two coats epoxy paint little tricky paint around engine mount used long cotton swab inserted through drain Continued page 138 May1984 135
Edition: Model Aviation - 1984/05
Page Numbers: 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 135
FIVE MINUTES AGO bellyaching temperature bone-chilling snow about superheated summer 1983 falling resolution made Now write shortly after New involuntary stay away epoxy Years Daythe low sky lead gray the past five years Ive increas During 1948 Vince Bentley obtained three amazing photos Ray Arden Vince believes Ray designed after Atom 09 Bill Winter remembers lrv Polk talking about somebodys miniature engines before Atom produced Poiks tiny Free Flight held Arden model would ROG ice front yard lake tiny square hole spinner accepted ratcheted starter Ray spun between forefinger thumb three engines appear different Two ob viously spark ignition note timer ad vance arms Two have underslung tanks different No tank visible the model engine could have glowl No spark-ignition points visible Props turn clockwise appears lami nated small engines paper match much longer inch ing sensitivity whiff produces angry welts itching lasts months did resolve fly year want fly Electric high-per formance fighter-like thing flaps cobalt direct-drive 05and some ultimate efficient thing yet paper will run 13-min-plus perhaps attain total duration 15 1 8 mm thermal assistance using reduction setup huge fold ing fan have five glow-powered slow ships soaring ability shy either radio engine Two Giant Scale jobs roost rafters up Long Island retread guy cant cope such giants guys will buy van Ill reconsider Ever hang 10-ft monsters shop have battered Kadet fun Eaglet will have Enya 40 fourcycle Eagle springwith flaps big Krackerjac spoilers study procrastinated maintenance Theres Midwest Sniffer Astro 035 elec tric motor get too confused will fly nearby school yard until sort things out What else Oh yes Farman 400 Scale project shared Bill Kaluf Its tail-dragger no-dihedral can tilever wing huge flaps OS 40 four-cycle have rubber-powered Lincoln monoplane mind Rub ber power isnt peculiar Flying Models magazine sold over 800 plans year Srulls Shinden canard Only rare RC ships surpass Theres rud der-only throttle 22-year-old make-beheve Airknocker repub lished April Flying Models first printed 1963 Its wheels almost shapeless blobs pocked rubber treads long gone engine Enya lapped 09 also over 20 years old high-tech engines bite dust soon have Wankel engine havent yet figured out what rack mysterious wings tells have other ships hidden somewhere should trash can see dont want face up writing Too much talk about ship have 10 stories tell cat asleep foot-high mound photos Im asleep top Hermes just told editor de mand entire magazine remminds bad would nothing write about Four-cycle engines lost flying sites U jUSt fun Bill Winter U preoccupy Three years ago mesmerized first four-cycle heard run Andrews Aeromaster 05 60 yielded kind per formance old-timers dreamed about since someone named Feeney produced four-cycle briefly during war never saw Now fourcycles everywhere Oddly exception AMA PR Departments Doug Pratt four-cycles few far between huge local club Doug kid behind ice cream counter whomping out everything gliders Coverite Gee Bees scads kits gaggles RTFs Electrics now Giant Scale drag Pratt along nearby sites sits folding chair flies back forth extreme distances usually about 45 mm After such ses sion found antenna Adcom receiver unwrapped identify two planes son Mike started RC began hA-powered Gentle Lady Top Flite Metrick latter slip pery got him try Air Scout Concept Models OS 15 1 liked enough urge Doug try Ace RC acquired Owen Kampen design reengineered simplicity Lite Ply sides Dougs moves out Saito 30 four-cycle turning big prop Mean Mike transferred after framing G-S Stinson design Bob Smurthwaite Pratt powered Saito 40 four-cycle Years ago G-S Stinson won RCMs Best Scale Year award Its too big has scale ribs etc seemingly quite heavy seen pictures Smurthwaites Stinson Howard flying floats nagging doubts use flaps properly ailerons slightly reflexed joy Doug has RAM lights includ ing strobe rudder tip running lights bright landing lights Touch5~OVTU~Z .kn&IQtIi~ CILsCCQLi15SULN CM T Sru_________ 1I$SVE2 CtEO FUSLGE0 IO0 UMR KlACk OPLANDS RTP MODEL 0 0M4 PROPOLLER_______________ RJLQR9O'LII L.2Li LENGTh 176 TOTAL WFIrwT top drawing 1946 issue British magazine Model Aircraft since discontinued Vince Bentleys Round-the-Pole speedster RTP flying craze England years capable 222 5 OL rubber two loops geared 11 geared prop 21 Noted Wakefielder Bob Copland quickly boosted RTP mark 4-plus mm illustrated model having microfilm covering single-wheel gear Drawings both models appeared same issue Coplands 10-in prop almost half 21%-in span Model weighed 5/8 oz Broken line outlining wing shows larger version broke 4% mm Flown 6-ft lines and-goes lights quite fly experience normally too dark Kaluf modernized RC Spe Winter thinks four-cycle engines real Silent Revolution hes intrigued sight Doug Pratt seated folding chair flying two ships back forth 45 mm long-legged flights planes interesting left G-S Stinson Saito 40 flaps work flawlessly picture-book landings rather high loading also has RAM strobe tail light tip lights landing lights glow brilliantly dusk other plane Air Scout designed Owen Kampen Concept Madels now kitted Ace Its Saito 30 heavy plane chugs along like lightplane cross countrytached 800850 rpm idle 8-6 Master Airacrew May1984 19 Taken Radiaplane plant 1943 Reginald Denny stands second right interna tional movie star Denny active aviation modeling Radioplane produced some 13000 early drones target practice ancestors todays sophisticated RPVs Denny remembered Dervnymite engine famous kit Dennyplane realistic fine-flying cabin plane revived Doc Mathews January 1977 MA Plan No 169 photo Warren Anderson AMA 1083 also license number NAA before AMA began Saito 30 Hobby Lobbys Klemm can landed tick-tick idle Dougs Saito 30 idles low 860 rpmOK dont believe 0S 40 four-cycle Farman four-cycles vastly underrated cial using 2 deg dihedral longer nose flaps ailerons chose 05 40 four-cycle turns 13-5 superb flier Kalufs redesigned RC Special will two-parter Aus tralian Airborne magazine also has 25/8djhedrol R/O 7/8for ailerons0 optional wing geometry K K__ LI [J L4 flop deflection ASTRO SPOOK Designed BILL WINTER WING SPANS 45 l/2 WING AREA 356 SO INS POWERASTRO FLIGHT 05 COBALT DIRECT PROP 7D X 4P fIap piece 0 0 Li Winters experimental low-winger direct-drive cobalt electric motor features ailerons/ elevator/shut-offand center-section flaps battery radiator tunnel low center gravity good cooling Theres much about design characteristics text turn big props large disk areas have great thrust burn fuel 50% less normal rate Since four-cycles quiet may answer noise problem Muffled Schnuerles have improved horrendous situation goes back years understand noise sound frequency annoys peopletheres nothing irritating whining Ive involved ongoing battle between people roughtly mile flying site guys fly park use strict muffler rules stern practices guys measure sound officials observing sound has measured area com plaints level lowerusing noisiest engine divethan passing truck several blocks away car start ing up three driveways equip ment park officials agreed complaints groundless 35 people signed petition threatened legal action Will public park organization want legal pursuit town citizens answer would seem obvious modelers now belatedly en courage four-cycle engines limit number planes simultaneously flight Consider engine sound measured mile away club flies five planes together club modelers rubbing salt wounds tagonists Forget lawnmowers passing freight trains full-size planes over headali means absolutely nothing us different sizes engines simultaneous flight doing aerobatics what sort sound frequen cies result Perhaps have noted AMA Contest Board has approved limit 124 cu four-cycle engines RC Pattern special meets fly-ins four-cycles Twilight zone am looking letter R Vince Bentley California Its hIc stationery Control Research Model Dvision found ad index magazine Thats because Control Research vanished early 195 Os its crowning achievement very 20 Model Aviation First class way Eloy Marezs CAP 20 confused 20L powered Kavan Twin spans 88 weighs less 20 lbevidence trend light ness Giant Scaleeven though carries dual airborne system paint scheme authentic Eloy about model early 1984 issues Model Builder magazine Bionic Bat right its first flight Kremer Speed prize flew 1500-meter triangular course roughly 2Y2 mm Permitted 10-mm preflight period during pilot can store energy assist pedaling flight An Astro 40 wound generator pedaled charge 3-lb Ni-Cd pack two Astro 40s contributed propulsion claim prize denied because battery wasnt flat starteven though plane landed charge start MacCready team planning tries may well have won prize before issue reaches readers AeroVironment photo close-up left Bionic Bat plane evidently still development supplied Astros Bob Boucher answers riddle pusher prop installed boom supporting tail sur faces blade configuration theoretical ideal may worth copying large Rubber models geared Electrics big proDs nice two-tube receiver gas-filled RK-61 tube developed Ed Lorenz already pioneered first super-small lightweight single-tuber also RK-61 led Berkeleys Aerotrol miniature British Hivac tube fiendish device Reeds com ing followed proportional days witchcraft about over single tube idled no 15 mils signal dropped 2 3 doing operated relay between 8 Ll activated infamous escapement Eds twotuber idled first tube 2 mils signal triggered second tube now relay tube 25 mils gave authority relaywhich previously loved dance vibration driving escapement model pilot crazy two-tuber got around terrible Continued page 22 What can Telemaster two unique examples snapped H Thomas last years Petit Jean Jumbo Fly-In Left black four-engine ship three-blade props has OS 25s popular multi fliers twin tail pointed nosel Wing integral nacelles straps generous rubber flew finehad great sound Right Ford Trimotor note lovely Commodore ignition Super Cyke foreground flying fantasy performed well 40 noseand dummy windmilling outboard props Two stellar attractions last years Electric Fly Pennsylvania Kim Smith left shows off Ellis Grumers Smith Miniplane Astro Cobalt 15 reduction drivel6cellsof 550 mAh capacity 13-B prop Right Shag Ill hydro wheels held builder Nelson Whit man has Astro Cobalt 15 twelve 12 Ah cells 8-4 prop Pics Herb Dirks May1984 21 limitation single-tuber because gas-filled tubes gave up ghost nothing flat idled 15 mils cost $3 after war few modelers such money Vinces letter Warp 4 stuff Says mention Ed Lorenz John Worth same Control Re search triggered 1949/50 John three other partners gels can dance head pin Ed myself Dick dont remember last name Dick broke ties 1950 1 backed out 1951 Ed wound up firms affairs July 1983 started talk ing about Wakefields Ron Warring Bob Copland etc sent looking up some memorabiliathought readers might like share Author need know Vince wife emigrated England 1947 Ed Bentleys witness acquired citizenship 1954 'During war years England~ Vince recalls new flying sport introducedRound-the-Pole RTP door flying radius 6 ft permis sible around pole thus allowing sport flying average room Clubs competed month mailed times duration SMAE monthly winning times 45-60-sec mark Vince goes decided go out something outstandinga semiscale low wing weighing 5 oz slightly less 5 oz rubber Class slighly over 5 oz rubber Class B two -oz loops rubber geared together l-to-l geared 2-to-i faster-turning propel ler prop automatic variablepitch affair started high pitch went finer pitch progressively torque diminished model set new duration mark 2 mm 22 sec stood until super-duration de sign came Bob Copland low wing later won several speed contests After converting 300 sq Rubber job RC 1949/50 help Lorenz installed early singletuber four-arm escapement Vince became photographer migrated full-size aeronautics Lockheed Burbank spent 25 years Li aison Engineering corresponded Don Dickerson develop ing B&D proportional system about 20 years ago author others flew B&D systemwhich hernia-threatening hand-held transmitter Dons system contem porary Zel Ritchies California latter first brick produced 1956 big brick cause housed servos same case massive receiver Called Space Control later became Orbits first attempt proportional radio 22 Model Aviation WITH FEATURES YOU THE MODELER WANTED Ritchie priced $600 trade show Grand Rapids asked Hal d eBolt any6ne would buy anything expensiveat least $1500 todays dollarsand said Oh theyll buy airight Bentley added fourth chan nel B&D unflown ship VK cabin given Tony Addie Nacarrato Hobby Lobby says Vince pass some deserving youngster Vince spent 18 years fooling live steamstill getting back RC wish could fly darn things laments Vince met Ray Ardn can tell Ray flown gas-powered FF across Van Courtland Park New York City 1904 1904 correct mar ried girl feet landed known modelers worldwide development glow plug 1947and wonderful postwar Arden 09 19 interviewed Ray about time Candlewood Lake home north west Connecticut Before war designed famous Atom 09 Lou Garami working Polks Seventh Ave NYC two floors up almost opposite Penn Station brought national attention published designs especially Strato-Streak Ray Arden made other engines now hear about possibly first time designed tie tacks ran Ray no photos interviewed him Vince seems beaten punch 1948 now Vinces permission privileged show long lost photos remarkable engines virtually no knew existed thought Cox 010 miracle Spook stuff Like other creaky guys have through twin-pushers ROGs gas engines FF Gas CL RC rudder-only whistles-and-bells Scale new worthwhile tech nical development relished dont need Electrified dig discussion X design Weve Astro Hogs Astro this-and thats call Astro Spook Bob Boucher Astro Flight tickled pink name because ship mo tivated Astro Cobalt 05 refers geared big-prop floaters Win ter Syndrome although sells plenty reduction-drive systems both geared belt lovely things please Free Flight soulbut challenged says guys want raw power Can have best two worlds design three-view obviously can powered glow engine weli What different about theme model think unit unit can enlarged provide three basic sizes both glow Continued page 24 High film strength lubricant increased power long engine life Detergents cut performance robbing varnish Highest quality ingredients insure top engine performance reliability Gal Price Drum Price TypeNitro 0/0LubricantFreight PaidFreight-Collect FAI0%Synthetic $ 675 995 5s5%Synthetic $ 775 995 ScS0/oCastor $ 775 995 4cyI7%Castor $ 850 995 lOs10%Synthetic $ 895 995 lOc10%Castor $ 895 995 RIG12%Syn & Castor $ 995 95 iSs15%Synthetic $ 995 995 20c20%Castor 5 95 25s25%Synthetic 5 95 4040%15 Syn-5 Castor 5 95 5050%Synthetic 5 95 6060%Synthetic 5 95 C centlaunus US EXCEPT 54 GAL DRUMS MINIMUM ORDER 4 Gal Asst OK DISCOUNTS 24 63 Gal Deduct 50/a Asstd OK 64 Gal Orders Deduct 100/a Asstd OK SHELDONS Hours HOBBY SHOP Mon-Wed Fri & Sat 3157 Alum Rock Avenue -530 San Jose95127 Thur 930-900 M/C VISA CaliforniaSun 1200-500 UPS COD sis408 2514787 VIJLTMATEFI Voitmaster very precisely measures transmitter receiver battery voltage under load determine whether battery reaching discharged state Green yellow red scales indicate go-caution-no go situation unique features include four voltage ranges including 1 2V starter batteries Load Engage switch monitor recovery rate cells important parameter deter mining cell condition plus Load Status switch two different loads 200 ma 500 ma can engaged large packs 0 mah up mon itored validity Less connectors 26K18Voltmaster Kit$2495 26K 18CVoltmaster Assembled$2995 Send $200 complete catalog Ace items available ACE dealer must order direct add $100 handlingfaeP0 BO511E HIGGIIJ5vILLE MO 64037 816484-7121 May 1984 23 WINNERS Flat platinum coil element Ceramic core Idle Bar Idle cap Send SIOO catalogue ox 31228 Indpls IN 46231 electric-powered sport Electric see 035 right-on 05 075 direct drive mid-sized brother 15s 25s both geared direct big brother 25s 40s glow can 049s 09s 15s 20s perhaps 25s 30s 40s size can have wing cut off tip-bay extended what see soar ing adding bay yields nine versions Naturally wood sizes would beefier glow Bob wanted go 300 sq aileroned high-performance aerobatic thing Im hot pilot compromised 356 sq Cut off tip wish wanted good glide perhaps bit hard-bought soar ing rd need design trick book could fly safely ever get away powered gliders conservative high wings must able duplicate glow engine de signs see Thus low wing Ive always impressed ap pearance performance Don Srulls Rubber Scale model Hem kel fighter produced kit Flyline Models swept-forward trailing edges give aggressive appearance make design difficult minimum-area model ailerons scare Low dragrequires thin wing area shown tip rib model thinner drawn three-view fa miliar center-section flap Top Flites Contender especially poly version know much ship can slowed Like bobbing around top rubber ball Small crements flap proportional could boost lift needed slowed ap proaches flap close touch-down 2 3 deg flap carried tremendous washout effect insurance against snap An optional swept leading edge geom etry showna la theZlin DC-3 AT-6 etc Because washout rear ward-swept version would stable around stall safer - awkward attitudes less proficient piloting save weight small version no rudder used although rudder hinge line shown should wish swept-back rudder hinge line has sub stantial effect holding up inside wing turning small ver sion four servos would required rudder due flaps have three relying ailerons turn roll smooth aileron turns cant afford down-aileron yaw effects vertical tail must large enough pre vent yaw fighting against smooth turns maximum roll-axis stability tips washed-out slightly inclining aileron spar up tip during 24 Model Aviation L5 K construction aft tip section sanded beneath yield stable tip airfoilthus still washout addition center section leading edge rounded lines extreme leading edge descending tip rib washout tip rib flat board no Phillips entry small ships motor battery con sumes much internal space difficult cool case mishap cells become battery ram have quickly-detachable simulated radiator tunnel small version will take either six seven sub-C cells 05 five 800 mAh cells 035easily shifted balancing battery can pop out front fixed tunnel little no harm being done bigger versions twin tunnels located outward center would accommodate twin six-packs tunnels can eliminated favor side scoops jet-fighter style side view profile configuration minimizes diving turns spiraling side area front high rear low Fuselage flat-bottomed top swept down tail Vertical tail height limited tall tails produce ex cess leverage around rolling axis tendency cone glide-turn trims Much vertical tail area below centerline As Pattern need high profile area forward tall canopy made foam bit knife-edge-holding effect keep CG low possibleanother reason tunnel-batterythe flap aileron servos mounted flat line inside wing center section forward main spars other aft Probably six sub-Cs good begin ning point since ship clean 7-5 wood prop could better traditional 7-4 plastic all-up weight should fall between 30 35 oz fuselage seems long reflexes dont permit jackrabbit responses fingers crossed See-through magic Only Charles Dick ens could plot course item Lets begin stunning shot Bionic Bat taken last September 25 during first its two qualifying flights Shafter CA Kremer Speed Prizeto awarded achiev ing average speed 20 mph around 1500-meter triangular course two turning points 750 ters apart triangle otherwise variable Required fly course opposite directions Bionic Bat Bi onic muscle power Bat bat tery used store air crews energy during 1 0-mm period prior takeoff employed case power two I special Astro 40s assisted ped aling pilot making its second pass two Continued page 26 Heres Why. new Zero think youre going like model First its simple common-sense construction will get out workshop onto flying field sooner can really appreciate model Its large size 79 span 90 120 power gives realism stability flight smaller models cant begin match Its total accuracy scale has already made award winner highest Scale Masters static score ever awarded 985 Pilots Choice trophy 1983 excellent choice RC modeler looking step up truly impressive scale model Find out about new Zero other beautiful 1/5 scale models Call write catalog LE1ave iIatt ivuodels inc 6940 NW 15th st1 Plantation FIa 33313 Phone 305 501-4861 02810Mb IJ IJ3fl Butt fif Astounding realism attainabie plastics Very light weight discriminating hobbiest. Either Pilot version kit.. Sportsman Barnstormer.. Darn Good Airmen .. complete NEW LOW PRICES Scale $595 1/4 Scale $795 1/3 Scale 142 May 1984 25 See Deaier add Dollar direct order handiingI 0 The POWR ZOOM winch serious flyer 14 demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplaneXgJL choose speed select pulleys launchaminute flights use companion RETRIEVER MFG OF NI-STARTER $2995 Charger PLEASE SPECIFY WHICH CHARGER WHEN ORDERING DAVEY ICORPORATION SYSTEMS ONE WOOD ANEMALVERNPA19355 215644-0692 Write call information TORK-STARTER revolutionary concept power 15V glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/tO charger has LED indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment raceive free shiopinci handlinci YORK-STARTER $2995 Chargar 11 OV 220V 1 2V Fast Charter $2095 Without Charger CHARGERS $1295 Charger Only 1 1OV 220V 12V Fant Charger 301 464-2260 Send $1 Complete Catalog kits aCCessones Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 26 Model Aviation days later September 27 thought have won Paul Mac Cready-headed bunch prize about $30000 time record initial prizewinner broken other contenders additional prizes about $7500 will awarded until fund about $150000 depleted Editor formation received after column written indicates Royal Aeronautical Society has turned down Human Power Speed claim September 25/2 7 Mac Cready group turn-down due starting non-flat batteryeven though charge battery after attempt before Piloted MacCreadys son Parker 45-ft 84-lb Bionic Bat flew course 2 mm 39 sec 2 mm 35 sec 10-mm energy storage achieved pedaling third Astro 40 especially wound generator charge 3-lb Ni-Cd battery pack Al though carried man could con sider machine big model airplane fact weighs roughly half gross number Giant Scale models have flown successful ly sort thing Bob Campbell might build interested duration Indeed would make ideal electric-powered model Bob Boucher tells us prop re volved 250 rpm dont know gear-down ratio earlier Mac Cready machines did have energy assistance depending pedal ing alone props up 12-ft dia turned 1 00-to-l reduction speed flight safe say its some what faster-turning airscrew smaller diameter could build rather big model Bionic Bat almost anything 02 up doubt ful could built big enough require 40 modelers Bionic Bat spec ulative bonanza will note long prop spinner fact tail surfaces mounted thin boom close-up plc ture prop Bob Boucher Consultant Supplier GeneratorBattery-Motor electrical systems evi dently earlier test craft either re placed intensely modified shows prop hub attached long bearing-like concentric tube re volves boom What appears large ailerons three-axis controllable mount well inboard polydihedral break configuration tapered uptilted tip panels seems bit like winglets deed slow airspeeds angle inclination winglet may consid erably less angle see Learjets etc Like Free Flighters often speculate flight perform ance polydihedral panels because Continued page 28 plus shipping VISA MASTERCARD source QUIET FLIGHT supplies hi-starts accessorieselectric motors & reducers batteriescbutes braided nylon Iinetow lIne drums 12721 HASKELL LANE BOWIE MARYLAND 20716 JSPARROWHAWK1 1/32 SCALE PLASTIC MODEL KIT US Navy Sparrowhawks operated two dirigibles aircraft Carrier uuriIiy tile uS among Colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monotilament rigging U Detailed interior 21488 ClOUD WAY HAYWARD CA 94545 783-4868 28 Model Aviation 47 seem impart something special affect glide-turn characteristics Unexplained what could narrow-chord surfaces trailing edge tipand white blob could well Hoerner-varia tion tip trick light Bionic Bat level flight photo little things become intrigu ing man ground holding wind direction indicator two streamers probably Mylar reveal modest component head cross wind thrust line obviously zero tail boom wing may set slight incidence respect boom hence thrust line all-flying stabilizer tilted up about 5 6 deg pilot has posi tioned Bob Boucher tipped story last September sent scrawled notes some fascinating close-ups prop chain-drive system months went chased loose ends Astro Flight also supplied magic propulsion system Gossamer Penguin 1980 became first airplane history fly direct power sun solar cells 1981 solar-powered Solar Challenger flew 163 miles Paris England altitude 11000 ft Astro 40s translated energy propulsive force big props ticked over like Indoor Rubber stuff remind Gossamer Con dor purely man-powered won first Kremer prize fuel-less flight 1977 craft National Air & Space Museum 1979 Gossamer Albatross won another Kremer prize human-powered flight scross En glish Channel plane Lon don Science Museum Paul MacCready well-known modeler Bob Boucher take great pleasure effects full-scale aviation books Inc magazine growing companies released No vember its annual selection Americas 500 Fastest Growing Private Companies ranked according percentage sales increase fiscal 1978 through fiscal 1983 No 269 Gorham Model Products model Helicopter people boggles mind doesnt inclined think monster cor porations note words Private ly Owned doesnt mean firms have thousands employees al though some might Gorhams own press release proudly tells us company employs 12 full-time office factory personnel uses services 35 Ameri can companies subcontractors manufacturing process its Helicop ters sale popular Cricket given nearing 10000 kits Thats Continued page 13S 01 VOlta01008 O8O Fun/Winter Continued page 28 modest figure still lot choppers modeling world have others course including rotor span 10 ft Army An other requirement magazine s selection sales above $100000 less $15000000 drone connection Although first patented remotely-piloted vehicle drone dated WW days until WW II RPVs became practical part military hardware mainly lifelike targets Things like OQ2A remembered modelers later full-scale all-wood Culver Ca det About 12 ft span generous dihedral OQ2A powered Mc Culloch engine Ive told thing 5 10 hp up 18 looked like overblown Outdoor Rub ber job flat-topped triangular cross-sectioned fuselage thing catapulted shock cord off long launcher open-frame tubular con struction could hit 175 retrieval hit shut down engine popped chute top hatch first Mirror Meet 1947 Grummans Bethpage Long Island Army demonstrated three Wild man shot vertically over head heard did see thunderous impact concrete runway under Good Humor truck As Free Flight er knew what expect An other tore up sky until pilot goofed radio glitched demolish ing chicken coop its feathered habitants So heres Warren Anderson started Ohlsson 23 FF Gas jobs before WW II military assignments writes crew chief Radio Airplane Target Detachment flying OQ 2A drones first crew trained Army personnel Fort Bliss TX 1943 related us Good brothers taken RC idea several military units unable stir up much interest Finally US Cavalry accepted idea ac cording developed OQ2A wonder what Walt Good has say about Reginald Denny involved early manufacturing plane Mr Smith pointed out article merican Aircraft Modeler March 1971 picture took Radioplane plant 1943 shows both Smith Denny Reginald Denny handsome movie actor considerable fame truly good guy aviation Im going check out believe Reginald pilot interested air schools certainly major model airplane manufacturer advertised heavily mags grand FF Gas model kit Dennyplane fondly-re membered engine Dennymite Dennyplane famous day round-nosed aluminum cowl highwinged cabin model flew superb ly gosh looked like full-size plane lot people recent years have built thanks Doc Mathews revival January 1977 Model Aviation Plan No 169 $4 Power 19 25 Denny far cellu loid hero us Youll love Dennyplane Incidentally Radioplane produced 13935 drones under three designations Bill Winter 4426 Altura Ct Fairfax VA 22030 Cavalier/Laycock Continued oaoe 37 Epoxy balsa blocks place engine cowl Shape sand final contour keep very sharp chisel handy shaping carving balsa find faster using razor blades knife Use chisel carve close final size finish sanding Add gussets windshield side windows affixed contact cement engine compartment given two coats epoxy paint little tricky paint around engine mount used long cotton swab inserted through drain Continued page 138 May1984 135
Edition: Model Aviation - 1984/05
Page Numbers: 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 135
FIVE MINUTES AGO bellyaching temperature bone-chilling snow about superheated summer 1983 falling resolution made Now write shortly after New involuntary stay away epoxy Years Daythe low sky lead gray the past five years Ive increas During 1948 Vince Bentley obtained three amazing photos Ray Arden Vince believes Ray designed after Atom 09 Bill Winter remembers lrv Polk talking about somebodys miniature engines before Atom produced Poiks tiny Free Flight held Arden model would ROG ice front yard lake tiny square hole spinner accepted ratcheted starter Ray spun between forefinger thumb three engines appear different Two ob viously spark ignition note timer ad vance arms Two have underslung tanks different No tank visible the model engine could have glowl No spark-ignition points visible Props turn clockwise appears lami nated small engines paper match much longer inch ing sensitivity whiff produces angry welts itching lasts months did resolve fly year want fly Electric high-per formance fighter-like thing flaps cobalt direct-drive 05and some ultimate efficient thing yet paper will run 13-min-plus perhaps attain total duration 15 1 8 mm thermal assistance using reduction setup huge fold ing fan have five glow-powered slow ships soaring ability shy either radio engine Two Giant Scale jobs roost rafters up Long Island retread guy cant cope such giants guys will buy van Ill reconsider Ever hang 10-ft monsters shop have battered Kadet fun Eaglet will have Enya 40 fourcycle Eagle springwith flaps big Krackerjac spoilers study procrastinated maintenance Theres Midwest Sniffer Astro 035 elec tric motor get too confused will fly nearby school yard until sort things out What else Oh yes Farman 400 Scale project shared Bill Kaluf Its tail-dragger no-dihedral can tilever wing huge flaps OS 40 four-cycle have rubber-powered Lincoln monoplane mind Rub ber power isnt peculiar Flying Models magazine sold over 800 plans year Srulls Shinden canard Only rare RC ships surpass Theres rud der-only throttle 22-year-old make-beheve Airknocker repub lished April Flying Models first printed 1963 Its wheels almost shapeless blobs pocked rubber treads long gone engine Enya lapped 09 also over 20 years old high-tech engines bite dust soon have Wankel engine havent yet figured out what rack mysterious wings tells have other ships hidden somewhere should trash can see dont want face up writing Too much talk about ship have 10 stories tell cat asleep foot-high mound photos Im asleep top Hermes just told editor de mand entire magazine remminds bad would nothing write about Four-cycle engines lost flying sites U jUSt fun Bill Winter U preoccupy Three years ago mesmerized first four-cycle heard run Andrews Aeromaster 05 60 yielded kind per formance old-timers dreamed about since someone named Feeney produced four-cycle briefly during war never saw Now fourcycles everywhere Oddly exception AMA PR Departments Doug Pratt four-cycles few far between huge local club Doug kid behind ice cream counter whomping out everything gliders Coverite Gee Bees scads kits gaggles RTFs Electrics now Giant Scale drag Pratt along nearby sites sits folding chair flies back forth extreme distances usually about 45 mm After such ses sion found antenna Adcom receiver unwrapped identify two planes son Mike started RC began hA-powered Gentle Lady Top Flite Metrick latter slip pery got him try Air Scout Concept Models OS 15 1 liked enough urge Doug try Ace RC acquired Owen Kampen design reengineered simplicity Lite Ply sides Dougs moves out Saito 30 four-cycle turning big prop Mean Mike transferred after framing G-S Stinson design Bob Smurthwaite Pratt powered Saito 40 four-cycle Years ago G-S Stinson won RCMs Best Scale Year award Its too big has scale ribs etc seemingly quite heavy seen pictures Smurthwaites Stinson Howard flying floats nagging doubts use flaps properly ailerons slightly reflexed joy Doug has RAM lights includ ing strobe rudder tip running lights bright landing lights Touch5~OVTU~Z .kn&IQtIi~ CILsCCQLi15SULN CM T Sru_________ 1I$SVE2 CtEO FUSLGE0 IO0 UMR KlACk OPLANDS RTP MODEL 0 0M4 PROPOLLER_______________ RJLQR9O'LII L.2Li LENGTh 176 TOTAL WFIrwT top drawing 1946 issue British magazine Model Aircraft since discontinued Vince Bentleys Round-the-Pole speedster RTP flying craze England years capable 222 5 OL rubber two loops geared 11 geared prop 21 Noted Wakefielder Bob Copland quickly boosted RTP mark 4-plus mm illustrated model having microfilm covering single-wheel gear Drawings both models appeared same issue Coplands 10-in prop almost half 21%-in span Model weighed 5/8 oz Broken line outlining wing shows larger version broke 4% mm Flown 6-ft lines and-goes lights quite fly experience normally too dark Kaluf modernized RC Spe Winter thinks four-cycle engines real Silent Revolution hes intrigued sight Doug Pratt seated folding chair flying two ships back forth 45 mm long-legged flights planes interesting left G-S Stinson Saito 40 flaps work flawlessly picture-book landings rather high loading also has RAM strobe tail light tip lights landing lights glow brilliantly dusk other plane Air Scout designed Owen Kampen Concept Madels now kitted Ace Its Saito 30 heavy plane chugs along like lightplane cross countrytached 800850 rpm idle 8-6 Master Airacrew May1984 19 Taken Radiaplane plant 1943 Reginald Denny stands second right interna tional movie star Denny active aviation modeling Radioplane produced some 13000 early drones target practice ancestors todays sophisticated RPVs Denny remembered Dervnymite engine famous kit Dennyplane realistic fine-flying cabin plane revived Doc Mathews January 1977 MA Plan No 169 photo Warren Anderson AMA 1083 also license number NAA before AMA began Saito 30 Hobby Lobbys Klemm can landed tick-tick idle Dougs Saito 30 idles low 860 rpmOK dont believe 0S 40 four-cycle Farman four-cycles vastly underrated cial using 2 deg dihedral longer nose flaps ailerons chose 05 40 four-cycle turns 13-5 superb flier Kalufs redesigned RC Special will two-parter Aus tralian Airborne magazine also has 25/8djhedrol R/O 7/8for ailerons0 optional wing geometry K K__ LI [J L4 flop deflection ASTRO SPOOK Designed BILL WINTER WING SPANS 45 l/2 WING AREA 356 SO INS POWERASTRO FLIGHT 05 COBALT DIRECT PROP 7D X 4P fIap piece 0 0 Li Winters experimental low-winger direct-drive cobalt electric motor features ailerons/ elevator/shut-offand center-section flaps battery radiator tunnel low center gravity good cooling Theres much about design characteristics text turn big props large disk areas have great thrust burn fuel 50% less normal rate Since four-cycles quiet may answer noise problem Muffled Schnuerles have improved horrendous situation goes back years understand noise sound frequency annoys peopletheres nothing irritating whining Ive involved ongoing battle between people roughtly mile flying site guys fly park use strict muffler rules stern practices guys measure sound officials observing sound has measured area com plaints level lowerusing noisiest engine divethan passing truck several blocks away car start ing up three driveways equip ment park officials agreed complaints groundless 35 people signed petition threatened legal action Will public park organization want legal pursuit town citizens answer would seem obvious modelers now belatedly en courage four-cycle engines limit number planes simultaneously flight Consider engine sound measured mile away club flies five planes together club modelers rubbing salt wounds tagonists Forget lawnmowers passing freight trains full-size planes over headali means absolutely nothing us different sizes engines simultaneous flight doing aerobatics what sort sound frequen cies result Perhaps have noted AMA Contest Board has approved limit 124 cu four-cycle engines RC Pattern special meets fly-ins four-cycles Twilight zone am looking letter R Vince Bentley California Its hIc stationery Control Research Model Dvision found ad index magazine Thats because Control Research vanished early 195 Os its crowning achievement very 20 Model Aviation First class way Eloy Marezs CAP 20 confused 20L powered Kavan Twin spans 88 weighs less 20 lbevidence trend light ness Giant Scaleeven though carries dual airborne system paint scheme authentic Eloy about model early 1984 issues Model Builder magazine Bionic Bat right its first flight Kremer Speed prize flew 1500-meter triangular course roughly 2Y2 mm Permitted 10-mm preflight period during pilot can store energy assist pedaling flight An Astro 40 wound generator pedaled charge 3-lb Ni-Cd pack two Astro 40s contributed propulsion claim prize denied because battery wasnt flat starteven though plane landed charge start MacCready team planning tries may well have won prize before issue reaches readers AeroVironment photo close-up left Bionic Bat plane evidently still development supplied Astros Bob Boucher answers riddle pusher prop installed boom supporting tail sur faces blade configuration theoretical ideal may worth copying large Rubber models geared Electrics big proDs nice two-tube receiver gas-filled RK-61 tube developed Ed Lorenz already pioneered first super-small lightweight single-tuber also RK-61 led Berkeleys Aerotrol miniature British Hivac tube fiendish device Reeds com ing followed proportional days witchcraft about over single tube idled no 15 mils signal dropped 2 3 doing operated relay between 8 Ll activated infamous escapement Eds twotuber idled first tube 2 mils signal triggered second tube now relay tube 25 mils gave authority relaywhich previously loved dance vibration driving escapement model pilot crazy two-tuber got around terrible Continued page 22 What can Telemaster two unique examples snapped H Thomas last years Petit Jean Jumbo Fly-In Left black four-engine ship three-blade props has OS 25s popular multi fliers twin tail pointed nosel Wing integral nacelles straps generous rubber flew finehad great sound Right Ford Trimotor note lovely Commodore ignition Super Cyke foreground flying fantasy performed well 40 noseand dummy windmilling outboard props Two stellar attractions last years Electric Fly Pennsylvania Kim Smith left shows off Ellis Grumers Smith Miniplane Astro Cobalt 15 reduction drivel6cellsof 550 mAh capacity 13-B prop Right Shag Ill hydro wheels held builder Nelson Whit man has Astro Cobalt 15 twelve 12 Ah cells 8-4 prop Pics Herb Dirks May1984 21 limitation single-tuber because gas-filled tubes gave up ghost nothing flat idled 15 mils cost $3 after war few modelers such money Vinces letter Warp 4 stuff Says mention Ed Lorenz John Worth same Control Re search triggered 1949/50 John three other partners gels can dance head pin Ed myself Dick dont remember last name Dick broke ties 1950 1 backed out 1951 Ed wound up firms affairs July 1983 started talk ing about Wakefields Ron Warring Bob Copland etc sent looking up some memorabiliathought readers might like share Author need know Vince wife emigrated England 1947 Ed Bentleys witness acquired citizenship 1954 'During war years England~ Vince recalls new flying sport introducedRound-the-Pole RTP door flying radius 6 ft permis sible around pole thus allowing sport flying average room Clubs competed month mailed times duration SMAE monthly winning times 45-60-sec mark Vince goes decided go out something outstandinga semiscale low wing weighing 5 oz slightly less 5 oz rubber Class slighly over 5 oz rubber Class B two -oz loops rubber geared together l-to-l geared 2-to-i faster-turning propel ler prop automatic variablepitch affair started high pitch went finer pitch progressively torque diminished model set new duration mark 2 mm 22 sec stood until super-duration de sign came Bob Copland low wing later won several speed contests After converting 300 sq Rubber job RC 1949/50 help Lorenz installed early singletuber four-arm escapement Vince became photographer migrated full-size aeronautics Lockheed Burbank spent 25 years Li aison Engineering corresponded Don Dickerson develop ing B&D proportional system about 20 years ago author others flew B&D systemwhich hernia-threatening hand-held transmitter Dons system contem porary Zel Ritchies California latter first brick produced 1956 big brick cause housed servos same case massive receiver Called Space Control later became Orbits first attempt proportional radio 22 Model Aviation WITH FEATURES YOU THE MODELER WANTED Ritchie priced $600 trade show Grand Rapids asked Hal d eBolt any6ne would buy anything expensiveat least $1500 todays dollarsand said Oh theyll buy airight Bentley added fourth chan nel B&D unflown ship VK cabin given Tony Addie Nacarrato Hobby Lobby says Vince pass some deserving youngster Vince spent 18 years fooling live steamstill getting back RC wish could fly darn things laments Vince met Ray Ardn can tell Ray flown gas-powered FF across Van Courtland Park New York City 1904 1904 correct mar ried girl feet landed known modelers worldwide development glow plug 1947and wonderful postwar Arden 09 19 interviewed Ray about time Candlewood Lake home north west Connecticut Before war designed famous Atom 09 Lou Garami working Polks Seventh Ave NYC two floors up almost opposite Penn Station brought national attention published designs especially Strato-Streak Ray Arden made other engines now hear about possibly first time designed tie tacks ran Ray no photos interviewed him Vince seems beaten punch 1948 now Vinces permission privileged show long lost photos remarkable engines virtually no knew existed thought Cox 010 miracle Spook stuff Like other creaky guys have through twin-pushers ROGs gas engines FF Gas CL RC rudder-only whistles-and-bells Scale new worthwhile tech nical development relished dont need Electrified dig discussion X design Weve Astro Hogs Astro this-and thats call Astro Spook Bob Boucher Astro Flight tickled pink name because ship mo tivated Astro Cobalt 05 refers geared big-prop floaters Win ter Syndrome although sells plenty reduction-drive systems both geared belt lovely things please Free Flight soulbut challenged says guys want raw power Can have best two worlds design three-view obviously can powered glow engine weli What different about theme model think unit unit can enlarged provide three basic sizes both glow Continued page 24 High film strength lubricant increased power long engine life Detergents cut performance robbing varnish Highest quality ingredients insure top engine performance reliability Gal Price Drum Price TypeNitro 0/0LubricantFreight PaidFreight-Collect FAI0%Synthetic $ 675 995 5s5%Synthetic $ 775 995 ScS0/oCastor $ 775 995 4cyI7%Castor $ 850 995 lOs10%Synthetic $ 895 995 lOc10%Castor $ 895 995 RIG12%Syn & Castor $ 995 95 iSs15%Synthetic $ 995 995 20c20%Castor 5 95 25s25%Synthetic 5 95 4040%15 Syn-5 Castor 5 95 5050%Synthetic 5 95 6060%Synthetic 5 95 C centlaunus US EXCEPT 54 GAL DRUMS MINIMUM ORDER 4 Gal Asst OK DISCOUNTS 24 63 Gal Deduct 50/a Asstd OK 64 Gal Orders Deduct 100/a Asstd OK SHELDONS Hours HOBBY SHOP Mon-Wed Fri & Sat 3157 Alum Rock Avenue -530 San Jose95127 Thur 930-900 M/C VISA CaliforniaSun 1200-500 UPS COD sis408 2514787 VIJLTMATEFI Voitmaster very precisely measures transmitter receiver battery voltage under load determine whether battery reaching discharged state Green yellow red scales indicate go-caution-no go situation unique features include four voltage ranges including 1 2V starter batteries Load Engage switch monitor recovery rate cells important parameter deter mining cell condition plus Load Status switch two different loads 200 ma 500 ma can engaged large packs 0 mah up mon itored validity Less connectors 26K18Voltmaster Kit$2495 26K 18CVoltmaster Assembled$2995 Send $200 complete catalog Ace items available ACE dealer must order direct add $100 handlingfaeP0 BO511E HIGGIIJ5vILLE MO 64037 816484-7121 May 1984 23 WINNERS Flat platinum coil element Ceramic core Idle Bar Idle cap Send SIOO catalogue ox 31228 Indpls IN 46231 electric-powered sport Electric see 035 right-on 05 075 direct drive mid-sized brother 15s 25s both geared direct big brother 25s 40s glow can 049s 09s 15s 20s perhaps 25s 30s 40s size can have wing cut off tip-bay extended what see soar ing adding bay yields nine versions Naturally wood sizes would beefier glow Bob wanted go 300 sq aileroned high-performance aerobatic thing Im hot pilot compromised 356 sq Cut off tip wish wanted good glide perhaps bit hard-bought soar ing rd need design trick book could fly safely ever get away powered gliders conservative high wings must able duplicate glow engine de signs see Thus low wing Ive always impressed ap pearance performance Don Srulls Rubber Scale model Hem kel fighter produced kit Flyline Models swept-forward trailing edges give aggressive appearance make design difficult minimum-area model ailerons scare Low dragrequires thin wing area shown tip rib model thinner drawn three-view fa miliar center-section flap Top Flites Contender especially poly version know much ship can slowed Like bobbing around top rubber ball Small crements flap proportional could boost lift needed slowed ap proaches flap close touch-down 2 3 deg flap carried tremendous washout effect insurance against snap An optional swept leading edge geom etry showna la theZlin DC-3 AT-6 etc Because washout rear ward-swept version would stable around stall safer - awkward attitudes less proficient piloting save weight small version no rudder used although rudder hinge line shown should wish swept-back rudder hinge line has sub stantial effect holding up inside wing turning small ver sion four servos would required rudder due flaps have three relying ailerons turn roll smooth aileron turns cant afford down-aileron yaw effects vertical tail must large enough pre vent yaw fighting against smooth turns maximum roll-axis stability tips washed-out slightly inclining aileron spar up tip during 24 Model Aviation L5 K construction aft tip section sanded beneath yield stable tip airfoilthus still washout addition center section leading edge rounded lines extreme leading edge descending tip rib washout tip rib flat board no Phillips entry small ships motor battery con sumes much internal space difficult cool case mishap cells become battery ram have quickly-detachable simulated radiator tunnel small version will take either six seven sub-C cells 05 five 800 mAh cells 035easily shifted balancing battery can pop out front fixed tunnel little no harm being done bigger versions twin tunnels located outward center would accommodate twin six-packs tunnels can eliminated favor side scoops jet-fighter style side view profile configuration minimizes diving turns spiraling side area front high rear low Fuselage flat-bottomed top swept down tail Vertical tail height limited tall tails produce ex cess leverage around rolling axis tendency cone glide-turn trims Much vertical tail area below centerline As Pattern need high profile area forward tall canopy made foam bit knife-edge-holding effect keep CG low possibleanother reason tunnel-batterythe flap aileron servos mounted flat line inside wing center section forward main spars other aft Probably six sub-Cs good begin ning point since ship clean 7-5 wood prop could better traditional 7-4 plastic all-up weight should fall between 30 35 oz fuselage seems long reflexes dont permit jackrabbit responses fingers crossed See-through magic Only Charles Dick ens could plot course item Lets begin stunning shot Bionic Bat taken last September 25 during first its two qualifying flights Shafter CA Kremer Speed Prizeto awarded achiev ing average speed 20 mph around 1500-meter triangular course two turning points 750 ters apart triangle otherwise variable Required fly course opposite directions Bionic Bat Bi onic muscle power Bat bat tery used store air crews energy during 1 0-mm period prior takeoff employed case power two I special Astro 40s assisted ped aling pilot making its second pass two Continued page 26 Heres Why. new Zero think youre going like model First its simple common-sense construction will get out workshop onto flying field sooner can really appreciate model Its large size 79 span 90 120 power gives realism stability flight smaller models cant begin match Its total accuracy scale has already made award winner highest Scale Masters static score ever awarded 985 Pilots Choice trophy 1983 excellent choice RC modeler looking step up truly impressive scale model Find out about new Zero other beautiful 1/5 scale models Call write catalog LE1ave iIatt ivuodels inc 6940 NW 15th st1 Plantation FIa 33313 Phone 305 501-4861 02810Mb IJ IJ3fl Butt fif Astounding realism attainabie plastics Very light weight discriminating hobbiest. Either Pilot version kit.. Sportsman Barnstormer.. Darn Good Airmen .. complete NEW LOW PRICES Scale $595 1/4 Scale $795 1/3 Scale 142 May 1984 25 See Deaier add Dollar direct order handiingI 0 The POWR ZOOM winch serious flyer 14 demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplaneXgJL choose speed select pulleys launchaminute flights use companion RETRIEVER MFG OF NI-STARTER $2995 Charger PLEASE SPECIFY WHICH CHARGER WHEN ORDERING DAVEY ICORPORATION SYSTEMS ONE WOOD ANEMALVERNPA19355 215644-0692 Write call information TORK-STARTER revolutionary concept power 15V glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/tO charger has LED indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment raceive free shiopinci handlinci YORK-STARTER $2995 Chargar 11 OV 220V 1 2V Fast Charter $2095 Without Charger CHARGERS $1295 Charger Only 1 1OV 220V 12V Fant Charger 301 464-2260 Send $1 Complete Catalog kits aCCessones Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 26 Model Aviation days later September 27 thought have won Paul Mac Cready-headed bunch prize about $30000 time record initial prizewinner broken other contenders additional prizes about $7500 will awarded until fund about $150000 depleted Editor formation received after column written indicates Royal Aeronautical Society has turned down Human Power Speed claim September 25/2 7 Mac Cready group turn-down due starting non-flat batteryeven though charge battery after attempt before Piloted MacCreadys son Parker 45-ft 84-lb Bionic Bat flew course 2 mm 39 sec 2 mm 35 sec 10-mm energy storage achieved pedaling third Astro 40 especially wound generator charge 3-lb Ni-Cd battery pack Al though carried man could con sider machine big model airplane fact weighs roughly half gross number Giant Scale models have flown successful ly sort thing Bob Campbell might build interested duration Indeed would make ideal electric-powered model Bob Boucher tells us prop re volved 250 rpm dont know gear-down ratio earlier Mac Cready machines did have energy assistance depending pedal ing alone props up 12-ft dia turned 1 00-to-l reduction speed flight safe say its some what faster-turning airscrew smaller diameter could build rather big model Bionic Bat almost anything 02 up doubt ful could built big enough require 40 modelers Bionic Bat spec ulative bonanza will note long prop spinner fact tail surfaces mounted thin boom close-up plc ture prop Bob Boucher Consultant Supplier GeneratorBattery-Motor electrical systems evi dently earlier test craft either re placed intensely modified shows prop hub attached long bearing-like concentric tube re volves boom What appears large ailerons three-axis controllable mount well inboard polydihedral break configuration tapered uptilted tip panels seems bit like winglets deed slow airspeeds angle inclination winglet may consid erably less angle see Learjets etc Like Free Flighters often speculate flight perform ance polydihedral panels because Continued page 28 plus shipping VISA MASTERCARD source QUIET FLIGHT supplies hi-starts accessorieselectric motors & reducers batteriescbutes braided nylon Iinetow lIne drums 12721 HASKELL LANE BOWIE MARYLAND 20716 JSPARROWHAWK1 1/32 SCALE PLASTIC MODEL KIT US Navy Sparrowhawks operated two dirigibles aircraft Carrier uuriIiy tile uS among Colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monotilament rigging U Detailed interior 21488 ClOUD WAY HAYWARD CA 94545 783-4868 28 Model Aviation 47 seem impart something special affect glide-turn characteristics Unexplained what could narrow-chord surfaces trailing edge tipand white blob could well Hoerner-varia tion tip trick light Bionic Bat level flight photo little things become intrigu ing man ground holding wind direction indicator two streamers probably Mylar reveal modest component head cross wind thrust line obviously zero tail boom wing may set slight incidence respect boom hence thrust line all-flying stabilizer tilted up about 5 6 deg pilot has posi tioned Bob Boucher tipped story last September sent scrawled notes some fascinating close-ups prop chain-drive system months went chased loose ends Astro Flight also supplied magic propulsion system Gossamer Penguin 1980 became first airplane history fly direct power sun solar cells 1981 solar-powered Solar Challenger flew 163 miles Paris England altitude 11000 ft Astro 40s translated energy propulsive force big props ticked over like Indoor Rubber stuff remind Gossamer Con dor purely man-powered won first Kremer prize fuel-less flight 1977 craft National Air & Space Museum 1979 Gossamer Albatross won another Kremer prize human-powered flight scross En glish Channel plane Lon don Science Museum Paul MacCready well-known modeler Bob Boucher take great pleasure effects full-scale aviation books Inc magazine growing companies released No vember its annual selection Americas 500 Fastest Growing Private Companies ranked according percentage sales increase fiscal 1978 through fiscal 1983 No 269 Gorham Model Products model Helicopter people boggles mind doesnt inclined think monster cor porations note words Private ly Owned doesnt mean firms have thousands employees al though some might Gorhams own press release proudly tells us company employs 12 full-time office factory personnel uses services 35 Ameri can companies subcontractors manufacturing process its Helicop ters sale popular Cricket given nearing 10000 kits Thats Continued page 13S 01 VOlta01008 O8O Fun/Winter Continued page 28 modest figure still lot choppers modeling world have others course including rotor span 10 ft Army An other requirement magazine s selection sales above $100000 less $15000000 drone connection Although first patented remotely-piloted vehicle drone dated WW days until WW II RPVs became practical part military hardware mainly lifelike targets Things like OQ2A remembered modelers later full-scale all-wood Culver Ca det About 12 ft span generous dihedral OQ2A powered Mc Culloch engine Ive told thing 5 10 hp up 18 looked like overblown Outdoor Rub ber job flat-topped triangular cross-sectioned fuselage thing catapulted shock cord off long launcher open-frame tubular con struction could hit 175 retrieval hit shut down engine popped chute top hatch first Mirror Meet 1947 Grummans Bethpage Long Island Army demonstrated three Wild man shot vertically over head heard did see thunderous impact concrete runway under Good Humor truck As Free Flight er knew what expect An other tore up sky until pilot goofed radio glitched demolish ing chicken coop its feathered habitants So heres Warren Anderson started Ohlsson 23 FF Gas jobs before WW II military assignments writes crew chief Radio Airplane Target Detachment flying OQ 2A drones first crew trained Army personnel Fort Bliss TX 1943 related us Good brothers taken RC idea several military units unable stir up much interest Finally US Cavalry accepted idea ac cording developed OQ2A wonder what Walt Good has say about Reginald Denny involved early manufacturing plane Mr Smith pointed out article merican Aircraft Modeler March 1971 picture took Radioplane plant 1943 shows both Smith Denny Reginald Denny handsome movie actor considerable fame truly good guy aviation Im going check out believe Reginald pilot interested air schools certainly major model airplane manufacturer advertised heavily mags grand FF Gas model kit Dennyplane fondly-re membered engine Dennymite Dennyplane famous day round-nosed aluminum cowl highwinged cabin model flew superb ly gosh looked like full-size plane lot people recent years have built thanks Doc Mathews revival January 1977 Model Aviation Plan No 169 $4 Power 19 25 Denny far cellu loid hero us Youll love Dennyplane Incidentally Radioplane produced 13935 drones under three designations Bill Winter 4426 Altura Ct Fairfax VA 22030 Cavalier/Laycock Continued oaoe 37 Epoxy balsa blocks place engine cowl Shape sand final contour keep very sharp chisel handy shaping carving balsa find faster using razor blades knife Use chisel carve close final size finish sanding Add gussets windshield side windows affixed contact cement engine compartment given two coats epoxy paint little tricky paint around engine mount used long cotton swab inserted through drain Continued page 138 May1984 135
Edition: Model Aviation - 1984/05
Page Numbers: 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 135
FIVE MINUTES AGO bellyaching temperature bone-chilling snow about superheated summer 1983 falling resolution made Now write shortly after New involuntary stay away epoxy Years Daythe low sky lead gray the past five years Ive increas During 1948 Vince Bentley obtained three amazing photos Ray Arden Vince believes Ray designed after Atom 09 Bill Winter remembers lrv Polk talking about somebodys miniature engines before Atom produced Poiks tiny Free Flight held Arden model would ROG ice front yard lake tiny square hole spinner accepted ratcheted starter Ray spun between forefinger thumb three engines appear different Two ob viously spark ignition note timer ad vance arms Two have underslung tanks different No tank visible the model engine could have glowl No spark-ignition points visible Props turn clockwise appears lami nated small engines paper match much longer inch ing sensitivity whiff produces angry welts itching lasts months did resolve fly year want fly Electric high-per formance fighter-like thing flaps cobalt direct-drive 05and some ultimate efficient thing yet paper will run 13-min-plus perhaps attain total duration 15 1 8 mm thermal assistance using reduction setup huge fold ing fan have five glow-powered slow ships soaring ability shy either radio engine Two Giant Scale jobs roost rafters up Long Island retread guy cant cope such giants guys will buy van Ill reconsider Ever hang 10-ft monsters shop have battered Kadet fun Eaglet will have Enya 40 fourcycle Eagle springwith flaps big Krackerjac spoilers study procrastinated maintenance Theres Midwest Sniffer Astro 035 elec tric motor get too confused will fly nearby school yard until sort things out What else Oh yes Farman 400 Scale project shared Bill Kaluf Its tail-dragger no-dihedral can tilever wing huge flaps OS 40 four-cycle have rubber-powered Lincoln monoplane mind Rub ber power isnt peculiar Flying Models magazine sold over 800 plans year Srulls Shinden canard Only rare RC ships surpass Theres rud der-only throttle 22-year-old make-beheve Airknocker repub lished April Flying Models first printed 1963 Its wheels almost shapeless blobs pocked rubber treads long gone engine Enya lapped 09 also over 20 years old high-tech engines bite dust soon have Wankel engine havent yet figured out what rack mysterious wings tells have other ships hidden somewhere should trash can see dont want face up writing Too much talk about ship have 10 stories tell cat asleep foot-high mound photos Im asleep top Hermes just told editor de mand entire magazine remminds bad would nothing write about Four-cycle engines lost flying sites U jUSt fun Bill Winter U preoccupy Three years ago mesmerized first four-cycle heard run Andrews Aeromaster 05 60 yielded kind per formance old-timers dreamed about since someone named Feeney produced four-cycle briefly during war never saw Now fourcycles everywhere Oddly exception AMA PR Departments Doug Pratt four-cycles few far between huge local club Doug kid behind ice cream counter whomping out everything gliders Coverite Gee Bees scads kits gaggles RTFs Electrics now Giant Scale drag Pratt along nearby sites sits folding chair flies back forth extreme distances usually about 45 mm After such ses sion found antenna Adcom receiver unwrapped identify two planes son Mike started RC began hA-powered Gentle Lady Top Flite Metrick latter slip pery got him try Air Scout Concept Models OS 15 1 liked enough urge Doug try Ace RC acquired Owen Kampen design reengineered simplicity Lite Ply sides Dougs moves out Saito 30 four-cycle turning big prop Mean Mike transferred after framing G-S Stinson design Bob Smurthwaite Pratt powered Saito 40 four-cycle Years ago G-S Stinson won RCMs Best Scale Year award Its too big has scale ribs etc seemingly quite heavy seen pictures Smurthwaites Stinson Howard flying floats nagging doubts use flaps properly ailerons slightly reflexed joy Doug has RAM lights includ ing strobe rudder tip running lights bright landing lights Touch5~OVTU~Z .kn&IQtIi~ CILsCCQLi15SULN CM T Sru_________ 1I$SVE2 CtEO FUSLGE0 IO0 UMR KlACk OPLANDS RTP MODEL 0 0M4 PROPOLLER_______________ RJLQR9O'LII L.2Li LENGTh 176 TOTAL WFIrwT top drawing 1946 issue British magazine Model Aircraft since discontinued Vince Bentleys Round-the-Pole speedster RTP flying craze England years capable 222 5 OL rubber two loops geared 11 geared prop 21 Noted Wakefielder Bob Copland quickly boosted RTP mark 4-plus mm illustrated model having microfilm covering single-wheel gear Drawings both models appeared same issue Coplands 10-in prop almost half 21%-in span Model weighed 5/8 oz Broken line outlining wing shows larger version broke 4% mm Flown 6-ft lines and-goes lights quite fly experience normally too dark Kaluf modernized RC Spe Winter thinks four-cycle engines real Silent Revolution hes intrigued sight Doug Pratt seated folding chair flying two ships back forth 45 mm long-legged flights planes interesting left G-S Stinson Saito 40 flaps work flawlessly picture-book landings rather high loading also has RAM strobe tail light tip lights landing lights glow brilliantly dusk other plane Air Scout designed Owen Kampen Concept Madels now kitted Ace Its Saito 30 heavy plane chugs along like lightplane cross countrytached 800850 rpm idle 8-6 Master Airacrew May1984 19 Taken Radiaplane plant 1943 Reginald Denny stands second right interna tional movie star Denny active aviation modeling Radioplane produced some 13000 early drones target practice ancestors todays sophisticated RPVs Denny remembered Dervnymite engine famous kit Dennyplane realistic fine-flying cabin plane revived Doc Mathews January 1977 MA Plan No 169 photo Warren Anderson AMA 1083 also license number NAA before AMA began Saito 30 Hobby Lobbys Klemm can landed tick-tick idle Dougs Saito 30 idles low 860 rpmOK dont believe 0S 40 four-cycle Farman four-cycles vastly underrated cial using 2 deg dihedral longer nose flaps ailerons chose 05 40 four-cycle turns 13-5 superb flier Kalufs redesigned RC Special will two-parter Aus tralian Airborne magazine also has 25/8djhedrol R/O 7/8for ailerons0 optional wing geometry K K__ LI [J L4 flop deflection ASTRO SPOOK Designed BILL WINTER WING SPANS 45 l/2 WING AREA 356 SO INS POWERASTRO FLIGHT 05 COBALT DIRECT PROP 7D X 4P fIap piece 0 0 Li Winters experimental low-winger direct-drive cobalt electric motor features ailerons/ elevator/shut-offand center-section flaps battery radiator tunnel low center gravity good cooling Theres much about design characteristics text turn big props large disk areas have great thrust burn fuel 50% less normal rate Since four-cycles quiet may answer noise problem Muffled Schnuerles have improved horrendous situation goes back years understand noise sound frequency annoys peopletheres nothing irritating whining Ive involved ongoing battle between people roughtly mile flying site guys fly park use strict muffler rules stern practices guys measure sound officials observing sound has measured area com plaints level lowerusing noisiest engine divethan passing truck several blocks away car start ing up three driveways equip ment park officials agreed complaints groundless 35 people signed petition threatened legal action Will public park organization want legal pursuit town citizens answer would seem obvious modelers now belatedly en courage four-cycle engines limit number planes simultaneously flight Consider engine sound measured mile away club flies five planes together club modelers rubbing salt wounds tagonists Forget lawnmowers passing freight trains full-size planes over headali means absolutely nothing us different sizes engines simultaneous flight doing aerobatics what sort sound frequen cies result Perhaps have noted AMA Contest Board has approved limit 124 cu four-cycle engines RC Pattern special meets fly-ins four-cycles Twilight zone am looking letter R Vince Bentley California Its hIc stationery Control Research Model Dvision found ad index magazine Thats because Control Research vanished early 195 Os its crowning achievement very 20 Model Aviation First class way Eloy Marezs CAP 20 confused 20L powered Kavan Twin spans 88 weighs less 20 lbevidence trend light ness Giant Scaleeven though carries dual airborne system paint scheme authentic Eloy about model early 1984 issues Model Builder magazine Bionic Bat right its first flight Kremer Speed prize flew 1500-meter triangular course roughly 2Y2 mm Permitted 10-mm preflight period during pilot can store energy assist pedaling flight An Astro 40 wound generator pedaled charge 3-lb Ni-Cd pack two Astro 40s contributed propulsion claim prize denied because battery wasnt flat starteven though plane landed charge start MacCready team planning tries may well have won prize before issue reaches readers AeroVironment photo close-up left Bionic Bat plane evidently still development supplied Astros Bob Boucher answers riddle pusher prop installed boom supporting tail sur faces blade configuration theoretical ideal may worth copying large Rubber models geared Electrics big proDs nice two-tube receiver gas-filled RK-61 tube developed Ed Lorenz already pioneered first super-small lightweight single-tuber also RK-61 led Berkeleys Aerotrol miniature British Hivac tube fiendish device Reeds com ing followed proportional days witchcraft about over single tube idled no 15 mils signal dropped 2 3 doing operated relay between 8 Ll activated infamous escapement Eds twotuber idled first tube 2 mils signal triggered second tube now relay tube 25 mils gave authority relaywhich previously loved dance vibration driving escapement model pilot crazy two-tuber got around terrible Continued page 22 What can Telemaster two unique examples snapped H Thomas last years Petit Jean Jumbo Fly-In Left black four-engine ship three-blade props has OS 25s popular multi fliers twin tail pointed nosel Wing integral nacelles straps generous rubber flew finehad great sound Right Ford Trimotor note lovely Commodore ignition Super Cyke foreground flying fantasy performed well 40 noseand dummy windmilling outboard props Two stellar attractions last years Electric Fly Pennsylvania Kim Smith left shows off Ellis Grumers Smith Miniplane Astro Cobalt 15 reduction drivel6cellsof 550 mAh capacity 13-B prop Right Shag Ill hydro wheels held builder Nelson Whit man has Astro Cobalt 15 twelve 12 Ah cells 8-4 prop Pics Herb Dirks May1984 21 limitation single-tuber because gas-filled tubes gave up ghost nothing flat idled 15 mils cost $3 after war few modelers such money Vinces letter Warp 4 stuff Says mention Ed Lorenz John Worth same Control Re search triggered 1949/50 John three other partners gels can dance head pin Ed myself Dick dont remember last name Dick broke ties 1950 1 backed out 1951 Ed wound up firms affairs July 1983 started talk ing about Wakefields Ron Warring Bob Copland etc sent looking up some memorabiliathought readers might like share Author need know Vince wife emigrated England 1947 Ed Bentleys witness acquired citizenship 1954 'During war years England~ Vince recalls new flying sport introducedRound-the-Pole RTP door flying radius 6 ft permis sible around pole thus allowing sport flying average room Clubs competed month mailed times duration SMAE monthly winning times 45-60-sec mark Vince goes decided go out something outstandinga semiscale low wing weighing 5 oz slightly less 5 oz rubber Class slighly over 5 oz rubber Class B two -oz loops rubber geared together l-to-l geared 2-to-i faster-turning propel ler prop automatic variablepitch affair started high pitch went finer pitch progressively torque diminished model set new duration mark 2 mm 22 sec stood until super-duration de sign came Bob Copland low wing later won several speed contests After converting 300 sq Rubber job RC 1949/50 help Lorenz installed early singletuber four-arm escapement Vince became photographer migrated full-size aeronautics Lockheed Burbank spent 25 years Li aison Engineering corresponded Don Dickerson develop ing B&D proportional system about 20 years ago author others flew B&D systemwhich hernia-threatening hand-held transmitter Dons system contem porary Zel Ritchies California latter first brick produced 1956 big brick cause housed servos same case massive receiver Called Space Control later became Orbits first attempt proportional radio 22 Model Aviation WITH FEATURES YOU THE MODELER WANTED Ritchie priced $600 trade show Grand Rapids asked Hal d eBolt any6ne would buy anything expensiveat least $1500 todays dollarsand said Oh theyll buy airight Bentley added fourth chan nel B&D unflown ship VK cabin given Tony Addie Nacarrato Hobby Lobby says Vince pass some deserving youngster Vince spent 18 years fooling live steamstill getting back RC wish could fly darn things laments Vince met Ray Ardn can tell Ray flown gas-powered FF across Van Courtland Park New York City 1904 1904 correct mar ried girl feet landed known modelers worldwide development glow plug 1947and wonderful postwar Arden 09 19 interviewed Ray about time Candlewood Lake home north west Connecticut Before war designed famous Atom 09 Lou Garami working Polks Seventh Ave NYC two floors up almost opposite Penn Station brought national attention published designs especially Strato-Streak Ray Arden made other engines now hear about possibly first time designed tie tacks ran Ray no photos interviewed him Vince seems beaten punch 1948 now Vinces permission privileged show long lost photos remarkable engines virtually no knew existed thought Cox 010 miracle Spook stuff Like other creaky guys have through twin-pushers ROGs gas engines FF Gas CL RC rudder-only whistles-and-bells Scale new worthwhile tech nical development relished dont need Electrified dig discussion X design Weve Astro Hogs Astro this-and thats call Astro Spook Bob Boucher Astro Flight tickled pink name because ship mo tivated Astro Cobalt 05 refers geared big-prop floaters Win ter Syndrome although sells plenty reduction-drive systems both geared belt lovely things please Free Flight soulbut challenged says guys want raw power Can have best two worlds design three-view obviously can powered glow engine weli What different about theme model think unit unit can enlarged provide three basic sizes both glow Continued page 24 High film strength lubricant increased power long engine life Detergents cut performance robbing varnish Highest quality ingredients insure top engine performance reliability Gal Price Drum Price TypeNitro 0/0LubricantFreight PaidFreight-Collect FAI0%Synthetic $ 675 995 5s5%Synthetic $ 775 995 ScS0/oCastor $ 775 995 4cyI7%Castor $ 850 995 lOs10%Synthetic $ 895 995 lOc10%Castor $ 895 995 RIG12%Syn & Castor $ 995 95 iSs15%Synthetic $ 995 995 20c20%Castor 5 95 25s25%Synthetic 5 95 4040%15 Syn-5 Castor 5 95 5050%Synthetic 5 95 6060%Synthetic 5 95 C centlaunus US EXCEPT 54 GAL DRUMS MINIMUM ORDER 4 Gal Asst OK DISCOUNTS 24 63 Gal Deduct 50/a Asstd OK 64 Gal Orders Deduct 100/a Asstd OK SHELDONS Hours HOBBY SHOP Mon-Wed Fri & Sat 3157 Alum Rock Avenue -530 San Jose95127 Thur 930-900 M/C VISA CaliforniaSun 1200-500 UPS COD sis408 2514787 VIJLTMATEFI Voitmaster very precisely measures transmitter receiver battery voltage under load determine whether battery reaching discharged state Green yellow red scales indicate go-caution-no go situation unique features include four voltage ranges including 1 2V starter batteries Load Engage switch monitor recovery rate cells important parameter deter mining cell condition plus Load Status switch two different loads 200 ma 500 ma can engaged large packs 0 mah up mon itored validity Less connectors 26K18Voltmaster Kit$2495 26K 18CVoltmaster Assembled$2995 Send $200 complete catalog Ace items available ACE dealer must order direct add $100 handlingfaeP0 BO511E HIGGIIJ5vILLE MO 64037 816484-7121 May 1984 23 WINNERS Flat platinum coil element Ceramic core Idle Bar Idle cap Send SIOO catalogue ox 31228 Indpls IN 46231 electric-powered sport Electric see 035 right-on 05 075 direct drive mid-sized brother 15s 25s both geared direct big brother 25s 40s glow can 049s 09s 15s 20s perhaps 25s 30s 40s size can have wing cut off tip-bay extended what see soar ing adding bay yields nine versions Naturally wood sizes would beefier glow Bob wanted go 300 sq aileroned high-performance aerobatic thing Im hot pilot compromised 356 sq Cut off tip wish wanted good glide perhaps bit hard-bought soar ing rd need design trick book could fly safely ever get away powered gliders conservative high wings must able duplicate glow engine de signs see Thus low wing Ive always impressed ap pearance performance Don Srulls Rubber Scale model Hem kel fighter produced kit Flyline Models swept-forward trailing edges give aggressive appearance make design difficult minimum-area model ailerons scare Low dragrequires thin wing area shown tip rib model thinner drawn three-view fa miliar center-section flap Top Flites Contender especially poly version know much ship can slowed Like bobbing around top rubber ball Small crements flap proportional could boost lift needed slowed ap proaches flap close touch-down 2 3 deg flap carried tremendous washout effect insurance against snap An optional swept leading edge geom etry showna la theZlin DC-3 AT-6 etc Because washout rear ward-swept version would stable around stall safer - awkward attitudes less proficient piloting save weight small version no rudder used although rudder hinge line shown should wish swept-back rudder hinge line has sub stantial effect holding up inside wing turning small ver sion four servos would required rudder due flaps have three relying ailerons turn roll smooth aileron turns cant afford down-aileron yaw effects vertical tail must large enough pre vent yaw fighting against smooth turns maximum roll-axis stability tips washed-out slightly inclining aileron spar up tip during 24 Model Aviation L5 K construction aft tip section sanded beneath yield stable tip airfoilthus still washout addition center section leading edge rounded lines extreme leading edge descending tip rib washout tip rib flat board no Phillips entry small ships motor battery con sumes much internal space difficult cool case mishap cells become battery ram have quickly-detachable simulated radiator tunnel small version will take either six seven sub-C cells 05 five 800 mAh cells 035easily shifted balancing battery can pop out front fixed tunnel little no harm being done bigger versions twin tunnels located outward center would accommodate twin six-packs tunnels can eliminated favor side scoops jet-fighter style side view profile configuration minimizes diving turns spiraling side area front high rear low Fuselage flat-bottomed top swept down tail Vertical tail height limited tall tails produce ex cess leverage around rolling axis tendency cone glide-turn trims Much vertical tail area below centerline As Pattern need high profile area forward tall canopy made foam bit knife-edge-holding effect keep CG low possibleanother reason tunnel-batterythe flap aileron servos mounted flat line inside wing center section forward main spars other aft Probably six sub-Cs good begin ning point since ship clean 7-5 wood prop could better traditional 7-4 plastic all-up weight should fall between 30 35 oz fuselage seems long reflexes dont permit jackrabbit responses fingers crossed See-through magic Only Charles Dick ens could plot course item Lets begin stunning shot Bionic Bat taken last September 25 during first its two qualifying flights Shafter CA Kremer Speed Prizeto awarded achiev ing average speed 20 mph around 1500-meter triangular course two turning points 750 ters apart triangle otherwise variable Required fly course opposite directions Bionic Bat Bi onic muscle power Bat bat tery used store air crews energy during 1 0-mm period prior takeoff employed case power two I special Astro 40s assisted ped aling pilot making its second pass two Continued page 26 Heres Why. new Zero think youre going like model First its simple common-sense construction will get out workshop onto flying field sooner can really appreciate model Its large size 79 span 90 120 power gives realism stability flight smaller models cant begin match Its total accuracy scale has already made award winner highest Scale Masters static score ever awarded 985 Pilots Choice trophy 1983 excellent choice RC modeler looking step up truly impressive scale model Find out about new Zero other beautiful 1/5 scale models Call write catalog LE1ave iIatt ivuodels inc 6940 NW 15th st1 Plantation FIa 33313 Phone 305 501-4861 02810Mb IJ IJ3fl Butt fif Astounding realism attainabie plastics Very light weight discriminating hobbiest. Either Pilot version kit.. Sportsman Barnstormer.. Darn Good Airmen .. complete NEW LOW PRICES Scale $595 1/4 Scale $795 1/3 Scale 142 May 1984 25 See Deaier add Dollar direct order handiingI 0 The POWR ZOOM winch serious flyer 14 demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplaneXgJL choose speed select pulleys launchaminute flights use companion RETRIEVER MFG OF NI-STARTER $2995 Charger PLEASE SPECIFY WHICH CHARGER WHEN ORDERING DAVEY ICORPORATION SYSTEMS ONE WOOD ANEMALVERNPA19355 215644-0692 Write call information TORK-STARTER revolutionary concept power 15V glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/tO charger has LED indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment raceive free shiopinci handlinci YORK-STARTER $2995 Chargar 11 OV 220V 1 2V Fast Charter $2095 Without Charger CHARGERS $1295 Charger Only 1 1OV 220V 12V Fant Charger 301 464-2260 Send $1 Complete Catalog kits aCCessones Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 26 Model Aviation days later September 27 thought have won Paul Mac Cready-headed bunch prize about $30000 time record initial prizewinner broken other contenders additional prizes about $7500 will awarded until fund about $150000 depleted Editor formation received after column written indicates Royal Aeronautical Society has turned down Human Power Speed claim September 25/2 7 Mac Cready group turn-down due starting non-flat batteryeven though charge battery after attempt before Piloted MacCreadys son Parker 45-ft 84-lb Bionic Bat flew course 2 mm 39 sec 2 mm 35 sec 10-mm energy storage achieved pedaling third Astro 40 especially wound generator charge 3-lb Ni-Cd battery pack Al though carried man could con sider machine big model airplane fact weighs roughly half gross number Giant Scale models have flown successful ly sort thing Bob Campbell might build interested duration Indeed would make ideal electric-powered model Bob Boucher tells us prop re volved 250 rpm dont know gear-down ratio earlier Mac Cready machines did have energy assistance depending pedal ing alone props up 12-ft dia turned 1 00-to-l reduction speed flight safe say its some what faster-turning airscrew smaller diameter could build rather big model Bionic Bat almost anything 02 up doubt ful could built big enough require 40 modelers Bionic Bat spec ulative bonanza will note long prop spinner fact tail surfaces mounted thin boom close-up plc ture prop Bob Boucher Consultant Supplier GeneratorBattery-Motor electrical systems evi dently earlier test craft either re placed intensely modified shows prop hub attached long bearing-like concentric tube re volves boom What appears large ailerons three-axis controllable mount well inboard polydihedral break configuration tapered uptilted tip panels seems bit like winglets deed slow airspeeds angle inclination winglet may consid erably less angle see Learjets etc Like Free Flighters often speculate flight perform ance polydihedral panels because Continued page 28 plus shipping VISA MASTERCARD source QUIET FLIGHT supplies hi-starts accessorieselectric motors & reducers batteriescbutes braided nylon Iinetow lIne drums 12721 HASKELL LANE BOWIE MARYLAND 20716 JSPARROWHAWK1 1/32 SCALE PLASTIC MODEL KIT US Navy Sparrowhawks operated two dirigibles aircraft Carrier uuriIiy tile uS among Colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monotilament rigging U Detailed interior 21488 ClOUD WAY HAYWARD CA 94545 783-4868 28 Model Aviation 47 seem impart something special affect glide-turn characteristics Unexplained what could narrow-chord surfaces trailing edge tipand white blob could well Hoerner-varia tion tip trick light Bionic Bat level flight photo little things become intrigu ing man ground holding wind direction indicator two streamers probably Mylar reveal modest component head cross wind thrust line obviously zero tail boom wing may set slight incidence respect boom hence thrust line all-flying stabilizer tilted up about 5 6 deg pilot has posi tioned Bob Boucher tipped story last September sent scrawled notes some fascinating close-ups prop chain-drive system months went chased loose ends Astro Flight also supplied magic propulsion system Gossamer Penguin 1980 became first airplane history fly direct power sun solar cells 1981 solar-powered Solar Challenger flew 163 miles Paris England altitude 11000 ft Astro 40s translated energy propulsive force big props ticked over like Indoor Rubber stuff remind Gossamer Con dor purely man-powered won first Kremer prize fuel-less flight 1977 craft National Air & Space Museum 1979 Gossamer Albatross won another Kremer prize human-powered flight scross En glish Channel plane Lon don Science Museum Paul MacCready well-known modeler Bob Boucher take great pleasure effects full-scale aviation books Inc magazine growing companies released No vember its annual selection Americas 500 Fastest Growing Private Companies ranked according percentage sales increase fiscal 1978 through fiscal 1983 No 269 Gorham Model Products model Helicopter people boggles mind doesnt inclined think monster cor porations note words Private ly Owned doesnt mean firms have thousands employees al though some might Gorhams own press release proudly tells us company employs 12 full-time office factory personnel uses services 35 Ameri can companies subcontractors manufacturing process its Helicop ters sale popular Cricket given nearing 10000 kits Thats Continued page 13S 01 VOlta01008 O8O Fun/Winter Continued page 28 modest figure still lot choppers modeling world have others course including rotor span 10 ft Army An other requirement magazine s selection sales above $100000 less $15000000 drone connection Although first patented remotely-piloted vehicle drone dated WW days until WW II RPVs became practical part military hardware mainly lifelike targets Things like OQ2A remembered modelers later full-scale all-wood Culver Ca det About 12 ft span generous dihedral OQ2A powered Mc Culloch engine Ive told thing 5 10 hp up 18 looked like overblown Outdoor Rub ber job flat-topped triangular cross-sectioned fuselage thing catapulted shock cord off long launcher open-frame tubular con struction could hit 175 retrieval hit shut down engine popped chute top hatch first Mirror Meet 1947 Grummans Bethpage Long Island Army demonstrated three Wild man shot vertically over head heard did see thunderous impact concrete runway under Good Humor truck As Free Flight er knew what expect An other tore up sky until pilot goofed radio glitched demolish ing chicken coop its feathered habitants So heres Warren Anderson started Ohlsson 23 FF Gas jobs before WW II military assignments writes crew chief Radio Airplane Target Detachment flying OQ 2A drones first crew trained Army personnel Fort Bliss TX 1943 related us Good brothers taken RC idea several military units unable stir up much interest Finally US Cavalry accepted idea ac cording developed OQ2A wonder what Walt Good has say about Reginald Denny involved early manufacturing plane Mr Smith pointed out article merican Aircraft Modeler March 1971 picture took Radioplane plant 1943 shows both Smith Denny Reginald Denny handsome movie actor considerable fame truly good guy aviation Im going check out believe Reginald pilot interested air schools certainly major model airplane manufacturer advertised heavily mags grand FF Gas model kit Dennyplane fondly-re membered engine Dennymite Dennyplane famous day round-nosed aluminum cowl highwinged cabin model flew superb ly gosh looked like full-size plane lot people recent years have built thanks Doc Mathews revival January 1977 Model Aviation Plan No 169 $4 Power 19 25 Denny far cellu loid hero us Youll love Dennyplane Incidentally Radioplane produced 13935 drones under three designations Bill Winter 4426 Altura Ct Fairfax VA 22030 Cavalier/Laycock Continued oaoe 37 Epoxy balsa blocks place engine cowl Shape sand final contour keep very sharp chisel handy shaping carving balsa find faster using razor blades knife Use chisel carve close final size finish sanding Add gussets windshield side windows affixed contact cement engine compartment given two coats epoxy paint little tricky paint around engine mount used long cotton swab inserted through drain Continued page 138 May1984 135
Edition: Model Aviation - 1984/05
Page Numbers: 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 135
FIVE MINUTES AGO bellyaching temperature bone-chilling snow about superheated summer 1983 falling resolution made Now write shortly after New involuntary stay away epoxy Years Daythe low sky lead gray the past five years Ive increas During 1948 Vince Bentley obtained three amazing photos Ray Arden Vince believes Ray designed after Atom 09 Bill Winter remembers lrv Polk talking about somebodys miniature engines before Atom produced Poiks tiny Free Flight held Arden model would ROG ice front yard lake tiny square hole spinner accepted ratcheted starter Ray spun between forefinger thumb three engines appear different Two ob viously spark ignition note timer ad vance arms Two have underslung tanks different No tank visible the model engine could have glowl No spark-ignition points visible Props turn clockwise appears lami nated small engines paper match much longer inch ing sensitivity whiff produces angry welts itching lasts months did resolve fly year want fly Electric high-per formance fighter-like thing flaps cobalt direct-drive 05and some ultimate efficient thing yet paper will run 13-min-plus perhaps attain total duration 15 1 8 mm thermal assistance using reduction setup huge fold ing fan have five glow-powered slow ships soaring ability shy either radio engine Two Giant Scale jobs roost rafters up Long Island retread guy cant cope such giants guys will buy van Ill reconsider Ever hang 10-ft monsters shop have battered Kadet fun Eaglet will have Enya 40 fourcycle Eagle springwith flaps big Krackerjac spoilers study procrastinated maintenance Theres Midwest Sniffer Astro 035 elec tric motor get too confused will fly nearby school yard until sort things out What else Oh yes Farman 400 Scale project shared Bill Kaluf Its tail-dragger no-dihedral can tilever wing huge flaps OS 40 four-cycle have rubber-powered Lincoln monoplane mind Rub ber power isnt peculiar Flying Models magazine sold over 800 plans year Srulls Shinden canard Only rare RC ships surpass Theres rud der-only throttle 22-year-old make-beheve Airknocker repub lished April Flying Models first printed 1963 Its wheels almost shapeless blobs pocked rubber treads long gone engine Enya lapped 09 also over 20 years old high-tech engines bite dust soon have Wankel engine havent yet figured out what rack mysterious wings tells have other ships hidden somewhere should trash can see dont want face up writing Too much talk about ship have 10 stories tell cat asleep foot-high mound photos Im asleep top Hermes just told editor de mand entire magazine remminds bad would nothing write about Four-cycle engines lost flying sites U jUSt fun Bill Winter U preoccupy Three years ago mesmerized first four-cycle heard run Andrews Aeromaster 05 60 yielded kind per formance old-timers dreamed about since someone named Feeney produced four-cycle briefly during war never saw Now fourcycles everywhere Oddly exception AMA PR Departments Doug Pratt four-cycles few far between huge local club Doug kid behind ice cream counter whomping out everything gliders Coverite Gee Bees scads kits gaggles RTFs Electrics now Giant Scale drag Pratt along nearby sites sits folding chair flies back forth extreme distances usually about 45 mm After such ses sion found antenna Adcom receiver unwrapped identify two planes son Mike started RC began hA-powered Gentle Lady Top Flite Metrick latter slip pery got him try Air Scout Concept Models OS 15 1 liked enough urge Doug try Ace RC acquired Owen Kampen design reengineered simplicity Lite Ply sides Dougs moves out Saito 30 four-cycle turning big prop Mean Mike transferred after framing G-S Stinson design Bob Smurthwaite Pratt powered Saito 40 four-cycle Years ago G-S Stinson won RCMs Best Scale Year award Its too big has scale ribs etc seemingly quite heavy seen pictures Smurthwaites Stinson Howard flying floats nagging doubts use flaps properly ailerons slightly reflexed joy Doug has RAM lights includ ing strobe rudder tip running lights bright landing lights Touch5~OVTU~Z .kn&IQtIi~ CILsCCQLi15SULN CM T Sru_________ 1I$SVE2 CtEO FUSLGE0 IO0 UMR KlACk OPLANDS RTP MODEL 0 0M4 PROPOLLER_______________ RJLQR9O'LII L.2Li LENGTh 176 TOTAL WFIrwT top drawing 1946 issue British magazine Model Aircraft since discontinued Vince Bentleys Round-the-Pole speedster RTP flying craze England years capable 222 5 OL rubber two loops geared 11 geared prop 21 Noted Wakefielder Bob Copland quickly boosted RTP mark 4-plus mm illustrated model having microfilm covering single-wheel gear Drawings both models appeared same issue Coplands 10-in prop almost half 21%-in span Model weighed 5/8 oz Broken line outlining wing shows larger version broke 4% mm Flown 6-ft lines and-goes lights quite fly experience normally too dark Kaluf modernized RC Spe Winter thinks four-cycle engines real Silent Revolution hes intrigued sight Doug Pratt seated folding chair flying two ships back forth 45 mm long-legged flights planes interesting left G-S Stinson Saito 40 flaps work flawlessly picture-book landings rather high loading also has RAM strobe tail light tip lights landing lights glow brilliantly dusk other plane Air Scout designed Owen Kampen Concept Madels now kitted Ace Its Saito 30 heavy plane chugs along like lightplane cross countrytached 800850 rpm idle 8-6 Master Airacrew May1984 19 Taken Radiaplane plant 1943 Reginald Denny stands second right interna tional movie star Denny active aviation modeling Radioplane produced some 13000 early drones target practice ancestors todays sophisticated RPVs Denny remembered Dervnymite engine famous kit Dennyplane realistic fine-flying cabin plane revived Doc Mathews January 1977 MA Plan No 169 photo Warren Anderson AMA 1083 also license number NAA before AMA began Saito 30 Hobby Lobbys Klemm can landed tick-tick idle Dougs Saito 30 idles low 860 rpmOK dont believe 0S 40 four-cycle Farman four-cycles vastly underrated cial using 2 deg dihedral longer nose flaps ailerons chose 05 40 four-cycle turns 13-5 superb flier Kalufs redesigned RC Special will two-parter Aus tralian Airborne magazine also has 25/8djhedrol R/O 7/8for ailerons0 optional wing geometry K K__ LI [J L4 flop deflection ASTRO SPOOK Designed BILL WINTER WING SPANS 45 l/2 WING AREA 356 SO INS POWERASTRO FLIGHT 05 COBALT DIRECT PROP 7D X 4P fIap piece 0 0 Li Winters experimental low-winger direct-drive cobalt electric motor features ailerons/ elevator/shut-offand center-section flaps battery radiator tunnel low center gravity good cooling Theres much about design characteristics text turn big props large disk areas have great thrust burn fuel 50% less normal rate Since four-cycles quiet may answer noise problem Muffled Schnuerles have improved horrendous situation goes back years understand noise sound frequency annoys peopletheres nothing irritating whining Ive involved ongoing battle between people roughtly mile flying site guys fly park use strict muffler rules stern practices guys measure sound officials observing sound has measured area com plaints level lowerusing noisiest engine divethan passing truck several blocks away car start ing up three driveways equip ment park officials agreed complaints groundless 35 people signed petition threatened legal action Will public park organization want legal pursuit town citizens answer would seem obvious modelers now belatedly en courage four-cycle engines limit number planes simultaneously flight Consider engine sound measured mile away club flies five planes together club modelers rubbing salt wounds tagonists Forget lawnmowers passing freight trains full-size planes over headali means absolutely nothing us different sizes engines simultaneous flight doing aerobatics what sort sound frequen cies result Perhaps have noted AMA Contest Board has approved limit 124 cu four-cycle engines RC Pattern special meets fly-ins four-cycles Twilight zone am looking letter R Vince Bentley California Its hIc stationery Control Research Model Dvision found ad index magazine Thats because Control Research vanished early 195 Os its crowning achievement very 20 Model Aviation First class way Eloy Marezs CAP 20 confused 20L powered Kavan Twin spans 88 weighs less 20 lbevidence trend light ness Giant Scaleeven though carries dual airborne system paint scheme authentic Eloy about model early 1984 issues Model Builder magazine Bionic Bat right its first flight Kremer Speed prize flew 1500-meter triangular course roughly 2Y2 mm Permitted 10-mm preflight period during pilot can store energy assist pedaling flight An Astro 40 wound generator pedaled charge 3-lb Ni-Cd pack two Astro 40s contributed propulsion claim prize denied because battery wasnt flat starteven though plane landed charge start MacCready team planning tries may well have won prize before issue reaches readers AeroVironment photo close-up left Bionic Bat plane evidently still development supplied Astros Bob Boucher answers riddle pusher prop installed boom supporting tail sur faces blade configuration theoretical ideal may worth copying large Rubber models geared Electrics big proDs nice two-tube receiver gas-filled RK-61 tube developed Ed Lorenz already pioneered first super-small lightweight single-tuber also RK-61 led Berkeleys Aerotrol miniature British Hivac tube fiendish device Reeds com ing followed proportional days witchcraft about over single tube idled no 15 mils signal dropped 2 3 doing operated relay between 8 Ll activated infamous escapement Eds twotuber idled first tube 2 mils signal triggered second tube now relay tube 25 mils gave authority relaywhich previously loved dance vibration driving escapement model pilot crazy two-tuber got around terrible Continued page 22 What can Telemaster two unique examples snapped H Thomas last years Petit Jean Jumbo Fly-In Left black four-engine ship three-blade props has OS 25s popular multi fliers twin tail pointed nosel Wing integral nacelles straps generous rubber flew finehad great sound Right Ford Trimotor note lovely Commodore ignition Super Cyke foreground flying fantasy performed well 40 noseand dummy windmilling outboard props Two stellar attractions last years Electric Fly Pennsylvania Kim Smith left shows off Ellis Grumers Smith Miniplane Astro Cobalt 15 reduction drivel6cellsof 550 mAh capacity 13-B prop Right Shag Ill hydro wheels held builder Nelson Whit man has Astro Cobalt 15 twelve 12 Ah cells 8-4 prop Pics Herb Dirks May1984 21 limitation single-tuber because gas-filled tubes gave up ghost nothing flat idled 15 mils cost $3 after war few modelers such money Vinces letter Warp 4 stuff Says mention Ed Lorenz John Worth same Control Re search triggered 1949/50 John three other partners gels can dance head pin Ed myself Dick dont remember last name Dick broke ties 1950 1 backed out 1951 Ed wound up firms affairs July 1983 started talk ing about Wakefields Ron Warring Bob Copland etc sent looking up some memorabiliathought readers might like share Author need know Vince wife emigrated England 1947 Ed Bentleys witness acquired citizenship 1954 'During war years England~ Vince recalls new flying sport introducedRound-the-Pole RTP door flying radius 6 ft permis sible around pole thus allowing sport flying average room Clubs competed month mailed times duration SMAE monthly winning times 45-60-sec mark Vince goes decided go out something outstandinga semiscale low wing weighing 5 oz slightly less 5 oz rubber Class slighly over 5 oz rubber Class B two -oz loops rubber geared together l-to-l geared 2-to-i faster-turning propel ler prop automatic variablepitch affair started high pitch went finer pitch progressively torque diminished model set new duration mark 2 mm 22 sec stood until super-duration de sign came Bob Copland low wing later won several speed contests After converting 300 sq Rubber job RC 1949/50 help Lorenz installed early singletuber four-arm escapement Vince became photographer migrated full-size aeronautics Lockheed Burbank spent 25 years Li aison Engineering corresponded Don Dickerson develop ing B&D proportional system about 20 years ago author others flew B&D systemwhich hernia-threatening hand-held transmitter Dons system contem porary Zel Ritchies California latter first brick produced 1956 big brick cause housed servos same case massive receiver Called Space Control later became Orbits first attempt proportional radio 22 Model Aviation WITH FEATURES YOU THE MODELER WANTED Ritchie priced $600 trade show Grand Rapids asked Hal d eBolt any6ne would buy anything expensiveat least $1500 todays dollarsand said Oh theyll buy airight Bentley added fourth chan nel B&D unflown ship VK cabin given Tony Addie Nacarrato Hobby Lobby says Vince pass some deserving youngster Vince spent 18 years fooling live steamstill getting back RC wish could fly darn things laments Vince met Ray Ardn can tell Ray flown gas-powered FF across Van Courtland Park New York City 1904 1904 correct mar ried girl feet landed known modelers worldwide development glow plug 1947and wonderful postwar Arden 09 19 interviewed Ray about time Candlewood Lake home north west Connecticut Before war designed famous Atom 09 Lou Garami working Polks Seventh Ave NYC two floors up almost opposite Penn Station brought national attention published designs especially Strato-Streak Ray Arden made other engines now hear about possibly first time designed tie tacks ran Ray no photos interviewed him Vince seems beaten punch 1948 now Vinces permission privileged show long lost photos remarkable engines virtually no knew existed thought Cox 010 miracle Spook stuff Like other creaky guys have through twin-pushers ROGs gas engines FF Gas CL RC rudder-only whistles-and-bells Scale new worthwhile tech nical development relished dont need Electrified dig discussion X design Weve Astro Hogs Astro this-and thats call Astro Spook Bob Boucher Astro Flight tickled pink name because ship mo tivated Astro Cobalt 05 refers geared big-prop floaters Win ter Syndrome although sells plenty reduction-drive systems both geared belt lovely things please Free Flight soulbut challenged says guys want raw power Can have best two worlds design three-view obviously can powered glow engine weli What different about theme model think unit unit can enlarged provide three basic sizes both glow Continued page 24 High film strength lubricant increased power long engine life Detergents cut performance robbing varnish Highest quality ingredients insure top engine performance reliability Gal Price Drum Price TypeNitro 0/0LubricantFreight PaidFreight-Collect FAI0%Synthetic $ 675 995 5s5%Synthetic $ 775 995 ScS0/oCastor $ 775 995 4cyI7%Castor $ 850 995 lOs10%Synthetic $ 895 995 lOc10%Castor $ 895 995 RIG12%Syn & Castor $ 995 95 iSs15%Synthetic $ 995 995 20c20%Castor 5 95 25s25%Synthetic 5 95 4040%15 Syn-5 Castor 5 95 5050%Synthetic 5 95 6060%Synthetic 5 95 C centlaunus US EXCEPT 54 GAL DRUMS MINIMUM ORDER 4 Gal Asst OK DISCOUNTS 24 63 Gal Deduct 50/a Asstd OK 64 Gal Orders Deduct 100/a Asstd OK SHELDONS Hours HOBBY SHOP Mon-Wed Fri & Sat 3157 Alum Rock Avenue -530 San Jose95127 Thur 930-900 M/C VISA CaliforniaSun 1200-500 UPS COD sis408 2514787 VIJLTMATEFI Voitmaster very precisely measures transmitter receiver battery voltage under load determine whether battery reaching discharged state Green yellow red scales indicate go-caution-no go situation unique features include four voltage ranges including 1 2V starter batteries Load Engage switch monitor recovery rate cells important parameter deter mining cell condition plus Load Status switch two different loads 200 ma 500 ma can engaged large packs 0 mah up mon itored validity Less connectors 26K18Voltmaster Kit$2495 26K 18CVoltmaster Assembled$2995 Send $200 complete catalog Ace items available ACE dealer must order direct add $100 handlingfaeP0 BO511E HIGGIIJ5vILLE MO 64037 816484-7121 May 1984 23 WINNERS Flat platinum coil element Ceramic core Idle Bar Idle cap Send SIOO catalogue ox 31228 Indpls IN 46231 electric-powered sport Electric see 035 right-on 05 075 direct drive mid-sized brother 15s 25s both geared direct big brother 25s 40s glow can 049s 09s 15s 20s perhaps 25s 30s 40s size can have wing cut off tip-bay extended what see soar ing adding bay yields nine versions Naturally wood sizes would beefier glow Bob wanted go 300 sq aileroned high-performance aerobatic thing Im hot pilot compromised 356 sq Cut off tip wish wanted good glide perhaps bit hard-bought soar ing rd need design trick book could fly safely ever get away powered gliders conservative high wings must able duplicate glow engine de signs see Thus low wing Ive always impressed ap pearance performance Don Srulls Rubber Scale model Hem kel fighter produced kit Flyline Models swept-forward trailing edges give aggressive appearance make design difficult minimum-area model ailerons scare Low dragrequires thin wing area shown tip rib model thinner drawn three-view fa miliar center-section flap Top Flites Contender especially poly version know much ship can slowed Like bobbing around top rubber ball Small crements flap proportional could boost lift needed slowed ap proaches flap close touch-down 2 3 deg flap carried tremendous washout effect insurance against snap An optional swept leading edge geom etry showna la theZlin DC-3 AT-6 etc Because washout rear ward-swept version would stable around stall safer - awkward attitudes less proficient piloting save weight small version no rudder used although rudder hinge line shown should wish swept-back rudder hinge line has sub stantial effect holding up inside wing turning small ver sion four servos would required rudder due flaps have three relying ailerons turn roll smooth aileron turns cant afford down-aileron yaw effects vertical tail must large enough pre vent yaw fighting against smooth turns maximum roll-axis stability tips washed-out slightly inclining aileron spar up tip during 24 Model Aviation L5 K construction aft tip section sanded beneath yield stable tip airfoilthus still washout addition center section leading edge rounded lines extreme leading edge descending tip rib washout tip rib flat board no Phillips entry small ships motor battery con sumes much internal space difficult cool case mishap cells become battery ram have quickly-detachable simulated radiator tunnel small version will take either six seven sub-C cells 05 five 800 mAh cells 035easily shifted balancing battery can pop out front fixed tunnel little no harm being done bigger versions twin tunnels located outward center would accommodate twin six-packs tunnels can eliminated favor side scoops jet-fighter style side view profile configuration minimizes diving turns spiraling side area front high rear low Fuselage flat-bottomed top swept down tail Vertical tail height limited tall tails produce ex cess leverage around rolling axis tendency cone glide-turn trims Much vertical tail area below centerline As Pattern need high profile area forward tall canopy made foam bit knife-edge-holding effect keep CG low possibleanother reason tunnel-batterythe flap aileron servos mounted flat line inside wing center section forward main spars other aft Probably six sub-Cs good begin ning point since ship clean 7-5 wood prop could better traditional 7-4 plastic all-up weight should fall between 30 35 oz fuselage seems long reflexes dont permit jackrabbit responses fingers crossed See-through magic Only Charles Dick ens could plot course item Lets begin stunning shot Bionic Bat taken last September 25 during first its two qualifying flights Shafter CA Kremer Speed Prizeto awarded achiev ing average speed 20 mph around 1500-meter triangular course two turning points 750 ters apart triangle otherwise variable Required fly course opposite directions Bionic Bat Bi onic muscle power Bat bat tery used store air crews energy during 1 0-mm period prior takeoff employed case power two I special Astro 40s assisted ped aling pilot making its second pass two Continued page 26 Heres Why. new Zero think youre going like model First its simple common-sense construction will get out workshop onto flying field sooner can really appreciate model Its large size 79 span 90 120 power gives realism stability flight smaller models cant begin match Its total accuracy scale has already made award winner highest Scale Masters static score ever awarded 985 Pilots Choice trophy 1983 excellent choice RC modeler looking step up truly impressive scale model Find out about new Zero other beautiful 1/5 scale models Call write catalog LE1ave iIatt ivuodels inc 6940 NW 15th st1 Plantation FIa 33313 Phone 305 501-4861 02810Mb IJ IJ3fl Butt fif Astounding realism attainabie plastics Very light weight discriminating hobbiest. Either Pilot version kit.. Sportsman Barnstormer.. Darn Good Airmen .. complete NEW LOW PRICES Scale $595 1/4 Scale $795 1/3 Scale 142 May 1984 25 See Deaier add Dollar direct order handiingI 0 The POWR ZOOM winch serious flyer 14 demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplaneXgJL choose speed select pulleys launchaminute flights use companion RETRIEVER MFG OF NI-STARTER $2995 Charger PLEASE SPECIFY WHICH CHARGER WHEN ORDERING DAVEY ICORPORATION SYSTEMS ONE WOOD ANEMALVERNPA19355 215644-0692 Write call information TORK-STARTER revolutionary concept power 15V glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/tO charger has LED indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment raceive free shiopinci handlinci YORK-STARTER $2995 Chargar 11 OV 220V 1 2V Fast Charter $2095 Without Charger CHARGERS $1295 Charger Only 1 1OV 220V 12V Fant Charger 301 464-2260 Send $1 Complete Catalog kits aCCessones Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 26 Model Aviation days later September 27 thought have won Paul Mac Cready-headed bunch prize about $30000 time record initial prizewinner broken other contenders additional prizes about $7500 will awarded until fund about $150000 depleted Editor formation received after column written indicates Royal Aeronautical Society has turned down Human Power Speed claim September 25/2 7 Mac Cready group turn-down due starting non-flat batteryeven though charge battery after attempt before Piloted MacCreadys son Parker 45-ft 84-lb Bionic Bat flew course 2 mm 39 sec 2 mm 35 sec 10-mm energy storage achieved pedaling third Astro 40 especially wound generator charge 3-lb Ni-Cd battery pack Al though carried man could con sider machine big model airplane fact weighs roughly half gross number Giant Scale models have flown successful ly sort thing Bob Campbell might build interested duration Indeed would make ideal electric-powered model Bob Boucher tells us prop re volved 250 rpm dont know gear-down ratio earlier Mac Cready machines did have energy assistance depending pedal ing alone props up 12-ft dia turned 1 00-to-l reduction speed flight safe say its some what faster-turning airscrew smaller diameter could build rather big model Bionic Bat almost anything 02 up doubt ful could built big enough require 40 modelers Bionic Bat spec ulative bonanza will note long prop spinner fact tail surfaces mounted thin boom close-up plc ture prop Bob Boucher Consultant Supplier GeneratorBattery-Motor electrical systems evi dently earlier test craft either re placed intensely modified shows prop hub attached long bearing-like concentric tube re volves boom What appears large ailerons three-axis controllable mount well inboard polydihedral break configuration tapered uptilted tip panels seems bit like winglets deed slow airspeeds angle inclination winglet may consid erably less angle see Learjets etc Like Free Flighters often speculate flight perform ance polydihedral panels because Continued page 28 plus shipping VISA MASTERCARD source QUIET FLIGHT supplies hi-starts accessorieselectric motors & reducers batteriescbutes braided nylon Iinetow lIne drums 12721 HASKELL LANE BOWIE MARYLAND 20716 JSPARROWHAWK1 1/32 SCALE PLASTIC MODEL KIT US Navy Sparrowhawks operated two dirigibles aircraft Carrier uuriIiy tile uS among Colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monotilament rigging U Detailed interior 21488 ClOUD WAY HAYWARD CA 94545 783-4868 28 Model Aviation 47 seem impart something special affect glide-turn characteristics Unexplained what could narrow-chord surfaces trailing edge tipand white blob could well Hoerner-varia tion tip trick light Bionic Bat level flight photo little things become intrigu ing man ground holding wind direction indicator two streamers probably Mylar reveal modest component head cross wind thrust line obviously zero tail boom wing may set slight incidence respect boom hence thrust line all-flying stabilizer tilted up about 5 6 deg pilot has posi tioned Bob Boucher tipped story last September sent scrawled notes some fascinating close-ups prop chain-drive system months went chased loose ends Astro Flight also supplied magic propulsion system Gossamer Penguin 1980 became first airplane history fly direct power sun solar cells 1981 solar-powered Solar Challenger flew 163 miles Paris England altitude 11000 ft Astro 40s translated energy propulsive force big props ticked over like Indoor Rubber stuff remind Gossamer Con dor purely man-powered won first Kremer prize fuel-less flight 1977 craft National Air & Space Museum 1979 Gossamer Albatross won another Kremer prize human-powered flight scross En glish Channel plane Lon don Science Museum Paul MacCready well-known modeler Bob Boucher take great pleasure effects full-scale aviation books Inc magazine growing companies released No vember its annual selection Americas 500 Fastest Growing Private Companies ranked according percentage sales increase fiscal 1978 through fiscal 1983 No 269 Gorham Model Products model Helicopter people boggles mind doesnt inclined think monster cor porations note words Private ly Owned doesnt mean firms have thousands employees al though some might Gorhams own press release proudly tells us company employs 12 full-time office factory personnel uses services 35 Ameri can companies subcontractors manufacturing process its Helicop ters sale popular Cricket given nearing 10000 kits Thats Continued page 13S 01 VOlta01008 O8O Fun/Winter Continued page 28 modest figure still lot choppers modeling world have others course including rotor span 10 ft Army An other requirement magazine s selection sales above $100000 less $15000000 drone connection Although first patented remotely-piloted vehicle drone dated WW days until WW II RPVs became practical part military hardware mainly lifelike targets Things like OQ2A remembered modelers later full-scale all-wood Culver Ca det About 12 ft span generous dihedral OQ2A powered Mc Culloch engine Ive told thing 5 10 hp up 18 looked like overblown Outdoor Rub ber job flat-topped triangular cross-sectioned fuselage thing catapulted shock cord off long launcher open-frame tubular con struction could hit 175 retrieval hit shut down engine popped chute top hatch first Mirror Meet 1947 Grummans Bethpage Long Island Army demonstrated three Wild man shot vertically over head heard did see thunderous impact concrete runway under Good Humor truck As Free Flight er knew what expect An other tore up sky until pilot goofed radio glitched demolish ing chicken coop its feathered habitants So heres Warren Anderson started Ohlsson 23 FF Gas jobs before WW II military assignments writes crew chief Radio Airplane Target Detachment flying OQ 2A drones first crew trained Army personnel Fort Bliss TX 1943 related us Good brothers taken RC idea several military units unable stir up much interest Finally US Cavalry accepted idea ac cording developed OQ2A wonder what Walt Good has say about Reginald Denny involved early manufacturing plane Mr Smith pointed out article merican Aircraft Modeler March 1971 picture took Radioplane plant 1943 shows both Smith Denny Reginald Denny handsome movie actor considerable fame truly good guy aviation Im going check out believe Reginald pilot interested air schools certainly major model airplane manufacturer advertised heavily mags grand FF Gas model kit Dennyplane fondly-re membered engine Dennymite Dennyplane famous day round-nosed aluminum cowl highwinged cabin model flew superb ly gosh looked like full-size plane lot people recent years have built thanks Doc Mathews revival January 1977 Model Aviation Plan No 169 $4 Power 19 25 Denny far cellu loid hero us Youll love Dennyplane Incidentally Radioplane produced 13935 drones under three designations Bill Winter 4426 Altura Ct Fairfax VA 22030 Cavalier/Laycock Continued oaoe 37 Epoxy balsa blocks place engine cowl Shape sand final contour keep very sharp chisel handy shaping carving balsa find faster using razor blades knife Use chisel carve close final size finish sanding Add gussets windshield side windows affixed contact cement engine compartment given two coats epoxy paint little tricky paint around engine mount used long cotton swab inserted through drain Continued page 138 May1984 135
Edition: Model Aviation - 1984/05
Page Numbers: 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 135
FIVE MINUTES AGO bellyaching temperature bone-chilling snow about superheated summer 1983 falling resolution made Now write shortly after New involuntary stay away epoxy Years Daythe low sky lead gray the past five years Ive increas During 1948 Vince Bentley obtained three amazing photos Ray Arden Vince believes Ray designed after Atom 09 Bill Winter remembers lrv Polk talking about somebodys miniature engines before Atom produced Poiks tiny Free Flight held Arden model would ROG ice front yard lake tiny square hole spinner accepted ratcheted starter Ray spun between forefinger thumb three engines appear different Two ob viously spark ignition note timer ad vance arms Two have underslung tanks different No tank visible the model engine could have glowl No spark-ignition points visible Props turn clockwise appears lami nated small engines paper match much longer inch ing sensitivity whiff produces angry welts itching lasts months did resolve fly year want fly Electric high-per formance fighter-like thing flaps cobalt direct-drive 05and some ultimate efficient thing yet paper will run 13-min-plus perhaps attain total duration 15 1 8 mm thermal assistance using reduction setup huge fold ing fan have five glow-powered slow ships soaring ability shy either radio engine Two Giant Scale jobs roost rafters up Long Island retread guy cant cope such giants guys will buy van Ill reconsider Ever hang 10-ft monsters shop have battered Kadet fun Eaglet will have Enya 40 fourcycle Eagle springwith flaps big Krackerjac spoilers study procrastinated maintenance Theres Midwest Sniffer Astro 035 elec tric motor get too confused will fly nearby school yard until sort things out What else Oh yes Farman 400 Scale project shared Bill Kaluf Its tail-dragger no-dihedral can tilever wing huge flaps OS 40 four-cycle have rubber-powered Lincoln monoplane mind Rub ber power isnt peculiar Flying Models magazine sold over 800 plans year Srulls Shinden canard Only rare RC ships surpass Theres rud der-only throttle 22-year-old make-beheve Airknocker repub lished April Flying Models first printed 1963 Its wheels almost shapeless blobs pocked rubber treads long gone engine Enya lapped 09 also over 20 years old high-tech engines bite dust soon have Wankel engine havent yet figured out what rack mysterious wings tells have other ships hidden somewhere should trash can see dont want face up writing Too much talk about ship have 10 stories tell cat asleep foot-high mound photos Im asleep top Hermes just told editor de mand entire magazine remminds bad would nothing write about Four-cycle engines lost flying sites U jUSt fun Bill Winter U preoccupy Three years ago mesmerized first four-cycle heard run Andrews Aeromaster 05 60 yielded kind per formance old-timers dreamed about since someone named Feeney produced four-cycle briefly during war never saw Now fourcycles everywhere Oddly exception AMA PR Departments Doug Pratt four-cycles few far between huge local club Doug kid behind ice cream counter whomping out everything gliders Coverite Gee Bees scads kits gaggles RTFs Electrics now Giant Scale drag Pratt along nearby sites sits folding chair flies back forth extreme distances usually about 45 mm After such ses sion found antenna Adcom receiver unwrapped identify two planes son Mike started RC began hA-powered Gentle Lady Top Flite Metrick latter slip pery got him try Air Scout Concept Models OS 15 1 liked enough urge Doug try Ace RC acquired Owen Kampen design reengineered simplicity Lite Ply sides Dougs moves out Saito 30 four-cycle turning big prop Mean Mike transferred after framing G-S Stinson design Bob Smurthwaite Pratt powered Saito 40 four-cycle Years ago G-S Stinson won RCMs Best Scale Year award Its too big has scale ribs etc seemingly quite heavy seen pictures Smurthwaites Stinson Howard flying floats nagging doubts use flaps properly ailerons slightly reflexed joy Doug has RAM lights includ ing strobe rudder tip running lights bright landing lights Touch5~OVTU~Z .kn&IQtIi~ CILsCCQLi15SULN CM T Sru_________ 1I$SVE2 CtEO FUSLGE0 IO0 UMR KlACk OPLANDS RTP MODEL 0 0M4 PROPOLLER_______________ RJLQR9O'LII L.2Li LENGTh 176 TOTAL WFIrwT top drawing 1946 issue British magazine Model Aircraft since discontinued Vince Bentleys Round-the-Pole speedster RTP flying craze England years capable 222 5 OL rubber two loops geared 11 geared prop 21 Noted Wakefielder Bob Copland quickly boosted RTP mark 4-plus mm illustrated model having microfilm covering single-wheel gear Drawings both models appeared same issue Coplands 10-in prop almost half 21%-in span Model weighed 5/8 oz Broken line outlining wing shows larger version broke 4% mm Flown 6-ft lines and-goes lights quite fly experience normally too dark Kaluf modernized RC Spe Winter thinks four-cycle engines real Silent Revolution hes intrigued sight Doug Pratt seated folding chair flying two ships back forth 45 mm long-legged flights planes interesting left G-S Stinson Saito 40 flaps work flawlessly picture-book landings rather high loading also has RAM strobe tail light tip lights landing lights glow brilliantly dusk other plane Air Scout designed Owen Kampen Concept Madels now kitted Ace Its Saito 30 heavy plane chugs along like lightplane cross countrytached 800850 rpm idle 8-6 Master Airacrew May1984 19 Taken Radiaplane plant 1943 Reginald Denny stands second right interna tional movie star Denny active aviation modeling Radioplane produced some 13000 early drones target practice ancestors todays sophisticated RPVs Denny remembered Dervnymite engine famous kit Dennyplane realistic fine-flying cabin plane revived Doc Mathews January 1977 MA Plan No 169 photo Warren Anderson AMA 1083 also license number NAA before AMA began Saito 30 Hobby Lobbys Klemm can landed tick-tick idle Dougs Saito 30 idles low 860 rpmOK dont believe 0S 40 four-cycle Farman four-cycles vastly underrated cial using 2 deg dihedral longer nose flaps ailerons chose 05 40 four-cycle turns 13-5 superb flier Kalufs redesigned RC Special will two-parter Aus tralian Airborne magazine also has 25/8djhedrol R/O 7/8for ailerons0 optional wing geometry K K__ LI [J L4 flop deflection ASTRO SPOOK Designed BILL WINTER WING SPANS 45 l/2 WING AREA 356 SO INS POWERASTRO FLIGHT 05 COBALT DIRECT PROP 7D X 4P fIap piece 0 0 Li Winters experimental low-winger direct-drive cobalt electric motor features ailerons/ elevator/shut-offand center-section flaps battery radiator tunnel low center gravity good cooling Theres much about design characteristics text turn big props large disk areas have great thrust burn fuel 50% less normal rate Since four-cycles quiet may answer noise problem Muffled Schnuerles have improved horrendous situation goes back years understand noise sound frequency annoys peopletheres nothing irritating whining Ive involved ongoing battle between people roughtly mile flying site guys fly park use strict muffler rules stern practices guys measure sound officials observing sound has measured area com plaints level lowerusing noisiest engine divethan passing truck several blocks away car start ing up three driveways equip ment park officials agreed complaints groundless 35 people signed petition threatened legal action Will public park organization want legal pursuit town citizens answer would seem obvious modelers now belatedly en courage four-cycle engines limit number planes simultaneously flight Consider engine sound measured mile away club flies five planes together club modelers rubbing salt wounds tagonists Forget lawnmowers passing freight trains full-size planes over headali means absolutely nothing us different sizes engines simultaneous flight doing aerobatics what sort sound frequen cies result Perhaps have noted AMA Contest Board has approved limit 124 cu four-cycle engines RC Pattern special meets fly-ins four-cycles Twilight zone am looking letter R Vince Bentley California Its hIc stationery Control Research Model Dvision found ad index magazine Thats because Control Research vanished early 195 Os its crowning achievement very 20 Model Aviation First class way Eloy Marezs CAP 20 confused 20L powered Kavan Twin spans 88 weighs less 20 lbevidence trend light ness Giant Scaleeven though carries dual airborne system paint scheme authentic Eloy about model early 1984 issues Model Builder magazine Bionic Bat right its first flight Kremer Speed prize flew 1500-meter triangular course roughly 2Y2 mm Permitted 10-mm preflight period during pilot can store energy assist pedaling flight An Astro 40 wound generator pedaled charge 3-lb Ni-Cd pack two Astro 40s contributed propulsion claim prize denied because battery wasnt flat starteven though plane landed charge start MacCready team planning tries may well have won prize before issue reaches readers AeroVironment photo close-up left Bionic Bat plane evidently still development supplied Astros Bob Boucher answers riddle pusher prop installed boom supporting tail sur faces blade configuration theoretical ideal may worth copying large Rubber models geared Electrics big proDs nice two-tube receiver gas-filled RK-61 tube developed Ed Lorenz already pioneered first super-small lightweight single-tuber also RK-61 led Berkeleys Aerotrol miniature British Hivac tube fiendish device Reeds com ing followed proportional days witchcraft about over single tube idled no 15 mils signal dropped 2 3 doing operated relay between 8 Ll activated infamous escapement Eds twotuber idled first tube 2 mils signal triggered second tube now relay tube 25 mils gave authority relaywhich previously loved dance vibration driving escapement model pilot crazy two-tuber got around terrible Continued page 22 What can Telemaster two unique examples snapped H Thomas last years Petit Jean Jumbo Fly-In Left black four-engine ship three-blade props has OS 25s popular multi fliers twin tail pointed nosel Wing integral nacelles straps generous rubber flew finehad great sound Right Ford Trimotor note lovely Commodore ignition Super Cyke foreground flying fantasy performed well 40 noseand dummy windmilling outboard props Two stellar attractions last years Electric Fly Pennsylvania Kim Smith left shows off Ellis Grumers Smith Miniplane Astro Cobalt 15 reduction drivel6cellsof 550 mAh capacity 13-B prop Right Shag Ill hydro wheels held builder Nelson Whit man has Astro Cobalt 15 twelve 12 Ah cells 8-4 prop Pics Herb Dirks May1984 21 limitation single-tuber because gas-filled tubes gave up ghost nothing flat idled 15 mils cost $3 after war few modelers such money Vinces letter Warp 4 stuff Says mention Ed Lorenz John Worth same Control Re search triggered 1949/50 John three other partners gels can dance head pin Ed myself Dick dont remember last name Dick broke ties 1950 1 backed out 1951 Ed wound up firms affairs July 1983 started talk ing about Wakefields Ron Warring Bob Copland etc sent looking up some memorabiliathought readers might like share Author need know Vince wife emigrated England 1947 Ed Bentleys witness acquired citizenship 1954 'During war years England~ Vince recalls new flying sport introducedRound-the-Pole RTP door flying radius 6 ft permis sible around pole thus allowing sport flying average room Clubs competed month mailed times duration SMAE monthly winning times 45-60-sec mark Vince goes decided go out something outstandinga semiscale low wing weighing 5 oz slightly less 5 oz rubber Class slighly over 5 oz rubber Class B two -oz loops rubber geared together l-to-l geared 2-to-i faster-turning propel ler prop automatic variablepitch affair started high pitch went finer pitch progressively torque diminished model set new duration mark 2 mm 22 sec stood until super-duration de sign came Bob Copland low wing later won several speed contests After converting 300 sq Rubber job RC 1949/50 help Lorenz installed early singletuber four-arm escapement Vince became photographer migrated full-size aeronautics Lockheed Burbank spent 25 years Li aison Engineering corresponded Don Dickerson develop ing B&D proportional system about 20 years ago author others flew B&D systemwhich hernia-threatening hand-held transmitter Dons system contem porary Zel Ritchies California latter first brick produced 1956 big brick cause housed servos same case massive receiver Called Space Control later became Orbits first attempt proportional radio 22 Model Aviation WITH FEATURES YOU THE MODELER WANTED Ritchie priced $600 trade show Grand Rapids asked Hal d eBolt any6ne would buy anything expensiveat least $1500 todays dollarsand said Oh theyll buy airight Bentley added fourth chan nel B&D unflown ship VK cabin given Tony Addie Nacarrato Hobby Lobby says Vince pass some deserving youngster Vince spent 18 years fooling live steamstill getting back RC wish could fly darn things laments Vince met Ray Ardn can tell Ray flown gas-powered FF across Van Courtland Park New York City 1904 1904 correct mar ried girl feet landed known modelers worldwide development glow plug 1947and wonderful postwar Arden 09 19 interviewed Ray about time Candlewood Lake home north west Connecticut Before war designed famous Atom 09 Lou Garami working Polks Seventh Ave NYC two floors up almost opposite Penn Station brought national attention published designs especially Strato-Streak Ray Arden made other engines now hear about possibly first time designed tie tacks ran Ray no photos interviewed him Vince seems beaten punch 1948 now Vinces permission privileged show long lost photos remarkable engines virtually no knew existed thought Cox 010 miracle Spook stuff Like other creaky guys have through twin-pushers ROGs gas engines FF Gas CL RC rudder-only whistles-and-bells Scale new worthwhile tech nical development relished dont need Electrified dig discussion X design Weve Astro Hogs Astro this-and thats call Astro Spook Bob Boucher Astro Flight tickled pink name because ship mo tivated Astro Cobalt 05 refers geared big-prop floaters Win ter Syndrome although sells plenty reduction-drive systems both geared belt lovely things please Free Flight soulbut challenged says guys want raw power Can have best two worlds design three-view obviously can powered glow engine weli What different about theme model think unit unit can enlarged provide three basic sizes both glow Continued page 24 High film strength lubricant increased power long engine life Detergents cut performance robbing varnish Highest quality ingredients insure top engine performance reliability Gal Price Drum Price TypeNitro 0/0LubricantFreight PaidFreight-Collect FAI0%Synthetic $ 675 995 5s5%Synthetic $ 775 995 ScS0/oCastor $ 775 995 4cyI7%Castor $ 850 995 lOs10%Synthetic $ 895 995 lOc10%Castor $ 895 995 RIG12%Syn & Castor $ 995 95 iSs15%Synthetic $ 995 995 20c20%Castor 5 95 25s25%Synthetic 5 95 4040%15 Syn-5 Castor 5 95 5050%Synthetic 5 95 6060%Synthetic 5 95 C centlaunus US EXCEPT 54 GAL DRUMS MINIMUM ORDER 4 Gal Asst OK DISCOUNTS 24 63 Gal Deduct 50/a Asstd OK 64 Gal Orders Deduct 100/a Asstd OK SHELDONS Hours HOBBY SHOP Mon-Wed Fri & Sat 3157 Alum Rock Avenue -530 San Jose95127 Thur 930-900 M/C VISA CaliforniaSun 1200-500 UPS COD sis408 2514787 VIJLTMATEFI Voitmaster very precisely measures transmitter receiver battery voltage under load determine whether battery reaching discharged state Green yellow red scales indicate go-caution-no go situation unique features include four voltage ranges including 1 2V starter batteries Load Engage switch monitor recovery rate cells important parameter deter mining cell condition plus Load Status switch two different loads 200 ma 500 ma can engaged large packs 0 mah up mon itored validity Less connectors 26K18Voltmaster Kit$2495 26K 18CVoltmaster Assembled$2995 Send $200 complete catalog Ace items available ACE dealer must order direct add $100 handlingfaeP0 BO511E HIGGIIJ5vILLE MO 64037 816484-7121 May 1984 23 WINNERS Flat platinum coil element Ceramic core Idle Bar Idle cap Send SIOO catalogue ox 31228 Indpls IN 46231 electric-powered sport Electric see 035 right-on 05 075 direct drive mid-sized brother 15s 25s both geared direct big brother 25s 40s glow can 049s 09s 15s 20s perhaps 25s 30s 40s size can have wing cut off tip-bay extended what see soar ing adding bay yields nine versions Naturally wood sizes would beefier glow Bob wanted go 300 sq aileroned high-performance aerobatic thing Im hot pilot compromised 356 sq Cut off tip wish wanted good glide perhaps bit hard-bought soar ing rd need design trick book could fly safely ever get away powered gliders conservative high wings must able duplicate glow engine de signs see Thus low wing Ive always impressed ap pearance performance Don Srulls Rubber Scale model Hem kel fighter produced kit Flyline Models swept-forward trailing edges give aggressive appearance make design difficult minimum-area model ailerons scare Low dragrequires thin wing area shown tip rib model thinner drawn three-view fa miliar center-section flap Top Flites Contender especially poly version know much ship can slowed Like bobbing around top rubber ball Small crements flap proportional could boost lift needed slowed ap proaches flap close touch-down 2 3 deg flap carried tremendous washout effect insurance against snap An optional swept leading edge geom etry showna la theZlin DC-3 AT-6 etc Because washout rear ward-swept version would stable around stall safer - awkward attitudes less proficient piloting save weight small version no rudder used although rudder hinge line shown should wish swept-back rudder hinge line has sub stantial effect holding up inside wing turning small ver sion four servos would required rudder due flaps have three relying ailerons turn roll smooth aileron turns cant afford down-aileron yaw effects vertical tail must large enough pre vent yaw fighting against smooth turns maximum roll-axis stability tips washed-out slightly inclining aileron spar up tip during 24 Model Aviation L5 K construction aft tip section sanded beneath yield stable tip airfoilthus still washout addition center section leading edge rounded lines extreme leading edge descending tip rib washout tip rib flat board no Phillips entry small ships motor battery con sumes much internal space difficult cool case mishap cells become battery ram have quickly-detachable simulated radiator tunnel small version will take either six seven sub-C cells 05 five 800 mAh cells 035easily shifted balancing battery can pop out front fixed tunnel little no harm being done bigger versions twin tunnels located outward center would accommodate twin six-packs tunnels can eliminated favor side scoops jet-fighter style side view profile configuration minimizes diving turns spiraling side area front high rear low Fuselage flat-bottomed top swept down tail Vertical tail height limited tall tails produce ex cess leverage around rolling axis tendency cone glide-turn trims Much vertical tail area below centerline As Pattern need high profile area forward tall canopy made foam bit knife-edge-holding effect keep CG low possibleanother reason tunnel-batterythe flap aileron servos mounted flat line inside wing center section forward main spars other aft Probably six sub-Cs good begin ning point since ship clean 7-5 wood prop could better traditional 7-4 plastic all-up weight should fall between 30 35 oz fuselage seems long reflexes dont permit jackrabbit responses fingers crossed See-through magic Only Charles Dick ens could plot course item Lets begin stunning shot Bionic Bat taken last September 25 during first its two qualifying flights Shafter CA Kremer Speed Prizeto awarded achiev ing average speed 20 mph around 1500-meter triangular course two turning points 750 ters apart triangle otherwise variable Required fly course opposite directions Bionic Bat Bi onic muscle power Bat bat tery used store air crews energy during 1 0-mm period prior takeoff employed case power two I special Astro 40s assisted ped aling pilot making its second pass two Continued page 26 Heres Why. new Zero think youre going like model First its simple common-sense construction will get out workshop onto flying field sooner can really appreciate model Its large size 79 span 90 120 power gives realism stability flight smaller models cant begin match Its total accuracy scale has already made award winner highest Scale Masters static score ever awarded 985 Pilots Choice trophy 1983 excellent choice RC modeler looking step up truly impressive scale model Find out about new Zero other beautiful 1/5 scale models Call write catalog LE1ave iIatt ivuodels inc 6940 NW 15th st1 Plantation FIa 33313 Phone 305 501-4861 02810Mb IJ IJ3fl Butt fif Astounding realism attainabie plastics Very light weight discriminating hobbiest. Either Pilot version kit.. Sportsman Barnstormer.. Darn Good Airmen .. complete NEW LOW PRICES Scale $595 1/4 Scale $795 1/3 Scale 142 May 1984 25 See Deaier add Dollar direct order handiingI 0 The POWR ZOOM winch serious flyer 14 demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplaneXgJL choose speed select pulleys launchaminute flights use companion RETRIEVER MFG OF NI-STARTER $2995 Charger PLEASE SPECIFY WHICH CHARGER WHEN ORDERING DAVEY ICORPORATION SYSTEMS ONE WOOD ANEMALVERNPA19355 215644-0692 Write call information TORK-STARTER revolutionary concept power 15V glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/tO charger has LED indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment raceive free shiopinci handlinci YORK-STARTER $2995 Chargar 11 OV 220V 1 2V Fast Charter $2095 Without Charger CHARGERS $1295 Charger Only 1 1OV 220V 12V Fant Charger 301 464-2260 Send $1 Complete Catalog kits aCCessones Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 26 Model Aviation days later September 27 thought have won Paul Mac Cready-headed bunch prize about $30000 time record initial prizewinner broken other contenders additional prizes about $7500 will awarded until fund about $150000 depleted Editor formation received after column written indicates Royal Aeronautical Society has turned down Human Power Speed claim September 25/2 7 Mac Cready group turn-down due starting non-flat batteryeven though charge battery after attempt before Piloted MacCreadys son Parker 45-ft 84-lb Bionic Bat flew course 2 mm 39 sec 2 mm 35 sec 10-mm energy storage achieved pedaling third Astro 40 especially wound generator charge 3-lb Ni-Cd battery pack Al though carried man could con sider machine big model airplane fact weighs roughly half gross number Giant Scale models have flown successful ly sort thing Bob Campbell might build interested duration Indeed would make ideal electric-powered model Bob Boucher tells us prop re volved 250 rpm dont know gear-down ratio earlier Mac Cready machines did have energy assistance depending pedal ing alone props up 12-ft dia turned 1 00-to-l reduction speed flight safe say its some what faster-turning airscrew smaller diameter could build rather big model Bionic Bat almost anything 02 up doubt ful could built big enough require 40 modelers Bionic Bat spec ulative bonanza will note long prop spinner fact tail surfaces mounted thin boom close-up plc ture prop Bob Boucher Consultant Supplier GeneratorBattery-Motor electrical systems evi dently earlier test craft either re placed intensely modified shows prop hub attached long bearing-like concentric tube re volves boom What appears large ailerons three-axis controllable mount well inboard polydihedral break configuration tapered uptilted tip panels seems bit like winglets deed slow airspeeds angle inclination winglet may consid erably less angle see Learjets etc Like Free Flighters often speculate flight perform ance polydihedral panels because Continued page 28 plus shipping VISA MASTERCARD source QUIET FLIGHT supplies hi-starts accessorieselectric motors & reducers batteriescbutes braided nylon Iinetow lIne drums 12721 HASKELL LANE BOWIE MARYLAND 20716 JSPARROWHAWK1 1/32 SCALE PLASTIC MODEL KIT US Navy Sparrowhawks operated two dirigibles aircraft Carrier uuriIiy tile uS among Colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monotilament rigging U Detailed interior 21488 ClOUD WAY HAYWARD CA 94545 783-4868 28 Model Aviation 47 seem impart something special affect glide-turn characteristics Unexplained what could narrow-chord surfaces trailing edge tipand white blob could well Hoerner-varia tion tip trick light Bionic Bat level flight photo little things become intrigu ing man ground holding wind direction indicator two streamers probably Mylar reveal modest component head cross wind thrust line obviously zero tail boom wing may set slight incidence respect boom hence thrust line all-flying stabilizer tilted up about 5 6 deg pilot has posi tioned Bob Boucher tipped story last September sent scrawled notes some fascinating close-ups prop chain-drive system months went chased loose ends Astro Flight also supplied magic propulsion system Gossamer Penguin 1980 became first airplane history fly direct power sun solar cells 1981 solar-powered Solar Challenger flew 163 miles Paris England altitude 11000 ft Astro 40s translated energy propulsive force big props ticked over like Indoor Rubber stuff remind Gossamer Con dor purely man-powered won first Kremer prize fuel-less flight 1977 craft National Air & Space Museum 1979 Gossamer Albatross won another Kremer prize human-powered flight scross En glish Channel plane Lon don Science Museum Paul MacCready well-known modeler Bob Boucher take great pleasure effects full-scale aviation books Inc magazine growing companies released No vember its annual selection Americas 500 Fastest Growing Private Companies ranked according percentage sales increase fiscal 1978 through fiscal 1983 No 269 Gorham Model Products model Helicopter people boggles mind doesnt inclined think monster cor porations note words Private ly Owned doesnt mean firms have thousands employees al though some might Gorhams own press release proudly tells us company employs 12 full-time office factory personnel uses services 35 Ameri can companies subcontractors manufacturing process its Helicop ters sale popular Cricket given nearing 10000 kits Thats Continued page 13S 01 VOlta01008 O8O Fun/Winter Continued page 28 modest figure still lot choppers modeling world have others course including rotor span 10 ft Army An other requirement magazine s selection sales above $100000 less $15000000 drone connection Although first patented remotely-piloted vehicle drone dated WW days until WW II RPVs became practical part military hardware mainly lifelike targets Things like OQ2A remembered modelers later full-scale all-wood Culver Ca det About 12 ft span generous dihedral OQ2A powered Mc Culloch engine Ive told thing 5 10 hp up 18 looked like overblown Outdoor Rub ber job flat-topped triangular cross-sectioned fuselage thing catapulted shock cord off long launcher open-frame tubular con struction could hit 175 retrieval hit shut down engine popped chute top hatch first Mirror Meet 1947 Grummans Bethpage Long Island Army demonstrated three Wild man shot vertically over head heard did see thunderous impact concrete runway under Good Humor truck As Free Flight er knew what expect An other tore up sky until pilot goofed radio glitched demolish ing chicken coop its feathered habitants So heres Warren Anderson started Ohlsson 23 FF Gas jobs before WW II military assignments writes crew chief Radio Airplane Target Detachment flying OQ 2A drones first crew trained Army personnel Fort Bliss TX 1943 related us Good brothers taken RC idea several military units unable stir up much interest Finally US Cavalry accepted idea ac cording developed OQ2A wonder what Walt Good has say about Reginald Denny involved early manufacturing plane Mr Smith pointed out article merican Aircraft Modeler March 1971 picture took Radioplane plant 1943 shows both Smith Denny Reginald Denny handsome movie actor considerable fame truly good guy aviation Im going check out believe Reginald pilot interested air schools certainly major model airplane manufacturer advertised heavily mags grand FF Gas model kit Dennyplane fondly-re membered engine Dennymite Dennyplane famous day round-nosed aluminum cowl highwinged cabin model flew superb ly gosh looked like full-size plane lot people recent years have built thanks Doc Mathews revival January 1977 Model Aviation Plan No 169 $4 Power 19 25 Denny far cellu loid hero us Youll love Dennyplane Incidentally Radioplane produced 13935 drones under three designations Bill Winter 4426 Altura Ct Fairfax VA 22030 Cavalier/Laycock Continued oaoe 37 Epoxy balsa blocks place engine cowl Shape sand final contour keep very sharp chisel handy shaping carving balsa find faster using razor blades knife Use chisel carve close final size finish sanding Add gussets windshield side windows affixed contact cement engine compartment given two coats epoxy paint little tricky paint around engine mount used long cotton swab inserted through drain Continued page 138 May1984 135