NO OCR TEXT Victory brings out smiles faces tired crew after 20-hr flight near Brookeville MD September 21-22 1 gai DCRC members worked hard during preparatory flights well official attempt Left right Mike DeMuth pilots assistant Jack Anglin Wayne Simpson timers Maynard Hill pilot George Pickrell Charlie Calvert CD Glen Scillian assistant CD Secrets success revealed test took literally years planning new FAI Dura tion World Record just over 20 hours powered RC models pilot estab lished last Septem ber lot problems solved keep model airthat long man set record describes prob lems trials errors eventual success unique flying machine planes may seem ugly facts boxes dont try move too fast Mother Nature puts some beautiful useful curves invisible air flowing near Inside boxes Well New Faithfuls internals also lessthan-elegant appearance Wires springs fuel tubes lacing cords shock-mounted para phernalia tangled end end scene included few splotches dried blood deposited evidence elbows propellers dont mix Any way look machine beautiful accurate adjective something admirable about way models guts frame muscles operated produce desired performance Twenty-five explosions per second shook machine like being hit tympanists mallet mezzo-forte Cranks turned valves slid bearings twirled gears whined sparks zapped springs twanged pushrods rocker arms beat tickety-tack rhythm against drone vibrating drum-tight skins cacaphony compounded whooshing propeller piccolo-like whistle air rushing tiny carburetor Indoors trillions electrons shoved alternator through maze diodes chips chokes connector plugs rainbow-colored harness wires move motors gears July 198279 Truss structures false ribs holey main ribs balsa box fuel tank visible shot Fuselage bottoms wing tips andstab covered wIth white opaque MonoKote remainder translucent orange scheme viewed best compromise visibility night during day Lights located teardrop-shaped lenses wing tip under stab Dark patches wing tips copper tape Staticmaster ionizers used part electrostatic wing leveller Flywheel magneto look like ugly bulges aerodynamic penalty small linkages Incandescent lights glowed wing tip atmospheric ions also being interrogated get reports bank angle happened comfortable womb laboratory out Mother Natures soggy foggy bumpy atmosphere very gratifing experience coax machine through two million thumps missed beat project hobby venture extraneous authors profession deals development remotely-piloted vehicles goal fly long time approach keep simple schedule whenever ready motivation fun Some aeromodeling techniques equipment employed may practical interest responsible developing long-duration drones unmanned vehicles UVs com munication relays decoys surveillance elec tronic countermeasures other uses idea model airplane technology might used reduce cost operational military systems very popular early 70s mixed reviews its merits have cropped up because some goals expectations went out bounds Perhaps article will bolster fundamentally sound idea would gratifying result However inside out side secrets New Faithful will exposed primarily help modelers also perhaps steer few fun breaking records Features New Faithful crate-like appear ance New Faithful consequence FAI rule limits Scale models gross takeoffweight 5 kg 1102 lb Aerobatic racing models seldom approach limit Duration models restriction means way increase fuel capacity decrease structural weight Engine displacement limited 10cc 061 cu lifting surface areawing tail restricted l5m sq 1615 sq ft neither rules influenced design wing sized fit inside Toyota Hatchback although largest per missible engine installed normally loafed 80 Model Aviation Left Charlie Calvert CD congratulates Maynard Hill Lots things have changed since similar picture made Frank Ehling Hill Old Faithful September1904 Planes look alike bellies larger important valuable changes have brought hobby AMA Only 18000 members got black-and-white pamphlet 1964 AMA close trouble now iargest sport aviation organization world Modified 05 FS6O used New Faithful mounted horizontally vibration dampening Reworked 05 10 throttle used Text explains lubrication wear problems magneto-flywheel spark ignition system Warningread text about flywheel shape Vibration testing done hanging model coat hangers foam pads elastic lines running ceiling back porch Hill FlyBy Night Aircraft Co Tail tied spring-loaded storm door door opening used approximate prop thrust Fuel frothing servowear other problems can detected method author recommends forchainsaw-powered models New Faithful wentthrough continuous 50-hour run prior its first test flight along 20% full power model size configuration could probably climb Out gross weight 11 lb loaded maximum fuel would have potential flight 200hr duration 6400-km 4000-mi range FAIs technical rules sensible promote safety provide common basis world-wide comparison generate some tough challenges rule permits pilot handle radio controls however would have repealed Duration records much beyond present made possible Editor FAIModel Committee ClAM has agreed provide pilot relief during such record attempts Subject approval overall FAI Sporting Com mittee will effective 1983 Development airplane matter putting some old principles together func tional way Reliability obtained fixing changing things failed during hours testing approach solving problems always seek simpler principle rather add complicated parts key functional components shown structural drawing engine modified 05 FS6O FS means four-stroke Fuel fed carburetor tank wing Fuel flow rate pressure steadied inter dicting float chamber Herein lies reason droop snoot Gravity dependable pumps modified bicycle alternator connected engine power takeoff through 21 step-up gear train Electric power alternator rectified dc filtered choked RF delivered aft under stabilizer RC receiver servos set small 100 mAh nickel-cadmium batteries located batteries provide safe landing case engine failure alternator powers control equipment three tiny lights needed wing tips tail night flying Also wing tips Staticmaster ionization units used electro static autopilot senses vector electric field exists atmosphere thereb4 Jrovides automatic leveling wings l telemetry transmitter hangs its dipole antenna station forward electrostatic stabilizer shown another vital unit Kraft transmitter flight tied automobile battery Thats put fuel tank spin prop life thing sustains itself least 20 hours airframe Balsa wood bridge-truss structures efficient easy build Streamlining boxes would add weight worth category competition Most airframe made ofcontest grade balsa coveringis Top Flites MonoKate fuselage outer wing panels stabilizer white opaque remainder translucent orange combination chosen best compromise daytime nighttime visibility bridge-truss spar wing front member protrudes way promotes early Onset turbulence boundary layer Usually airplane designers try keep boundary layers laminar over first half wing chord slow-flying models its easy induce laminar boundary layer persist too far flow can separate easily rear portion airfoil separation occursand probably will bumpy air en counteredthe result can drag force consid erably larger associated tripped turbulent boundary layer tends stay attached fuel tank does double duty center wing spar assembly 1/16 00 e 00 OCo tii~n 332 v0r 322 t8t5 23 212334 25 2357 5 10 1112150 O Propellor 16 dia tO pitch O Magneto & flywheel 05F560 engine modified @ 0S10 carbureto, modified Cam housing rea power take-off Filler made-from chemists filter paper O Float chamber Flearbie coupling rubber auto fuel hosel Two utep op gear train Fleoible coupling tygon tuhiegi Bicycle alternator @ Rectifier filter 6J Filters mesh iretal 3 200 mesh nylon er paper 062 Fuei tank sump also main center spar Telemetry transmitter j Incandescent bulbSO ma @SV red & greee lenses Stattcmaster 2y 500 ionizer Grounded guard strip copper tapel Auxiliary collector copper tapel @ Electrostatic autopilot Same 16 white lens @ Throttle serno Elevator rudder servos Kraft KP7F receiner @ Battery pack 1100 maHi NEW FAITHFUL cture componBnt layout sheets contest grade balsa coated internally epoxy resins impervious gasoline polyester resin covered externally fuel discussed later failures can result single layer fiberglass i/a oz/sq yd impreg- additions nitromethane propylene oxide ether nated same resin Most polyester Continued page 133 July 198281 Super Mini Boy Recommended Eigines Radios- Mufflers Helicopter tools stock Worlds stable easiest fly small 40 size R/O Helicopter Low maintenance mechanics engineer ed Dieter Schiuter Father RIO Helicopters Features fully collective Bell mixing main rotor head upright spinner starting straight shaft driven tail rotor & automatic compensation symmet rical prebuilt main rotor tail rotor blades autorotation clutch Uses standard 4 chanel radio Kits parts stock guarantee helicopters fly Ask man flies Move up Schiuter inSifrp U SEAN IflG subsidiary MINIATURE AIRCRAFT 2594 North Orange Blossom Trail ndo FL 32804 Phone 30514224531 test fuselages six flight fuselages high-altitude version Ranger V- 12 seriously delayed XP-77 use low-altitude engine its performance would inferior fighter airplane comparison existing models now production ac cording USAAF Technical Report #5359 Vidal Research took over job building wings made schedule slip Problems arose over matters basic time needed spread glue Completion first airplane delayed February 1944 Marcfr would make almost 1 years late wasnt until April Fools Day 1944 XP-77 flew Bells Niagra Falls NY factory Success last Far proto type arrived Wright Field May 2 soon revealed serious vibration 1700 rpm 2300 rpm probably due lack shock absorbers engine mounts June 6 1944 Allied troops storming Nor mandy beaches final assault Nazi-held Europe USAAF got around giving prototype XP-77 its serial number 43-34915 Official flight tests carried out Eglin Field FL second XP-77 43-34916 starting late July 1944 October 2 airplane fell out Immelmann turn inverted spin pilot recovered air plane went upright flat spin could recover forced jump pilot landed safely airplane demolished proved last straw project ended December 2 March 1945 war drawing close Army Air Forces completed report Flight Tests Bell XP-77 Airplane following has excerpted general handling characteristics XP-77 airplane satisfactory although restric tions evented dives spins violent maneuvers jectionable feature control system fixed trim tabs ailerons rudder results condition flight airplane will fly stick- rudder-free ground setting the. tabs Visibility good conditions flight ground handling Noise vibration cockpit considerable cockpit becomes very cold uncomfortable cold weather high altitude cockpit heat available high speed 328 mph obtained military power 3150 rpm 416 mani fold pressure 12600 ft critical altitude high speed 330 mph obtained war emergencypower 3300 rpm and57 at4000 ft critical altitude maximum rate climb obtained war emergency power 3630 feet per minute critical altitude 2000 ft ConclusionsThe overall performance XP-77 airplane inferior present fighter aircraft employed AAF results flight tests considerably lower estimated performance set Bell Aircraft Corp maximum speed airplane war emergency power considerably lower other AAF interceptor aircraft operating military power maximum rate climb military power very low interceptor air craft low service ceiling airplane renders useless against high altitude aircraft bad XP-77 fell 90 mph short its promised top speed rate climb no better 200-hp Pins Special aerobatic biplane service ceiling 30000 ft era P-38s would go 39000 ft P 51s would top 40000 ft interesting idea didnt work taught its creators lesson very very difficult build truly lightweight fighter plane General Dynamics learning lesson over again its F- 16 no longer lightweight Mach 2 ter course doesnt make sense give up such worthy goal As matter fact start Cassutt will close 250 mph 135-hp weighing little over 500 lb add couple machine guns some fuel radio two ours/Hill Continued page 80 other useful ingredients avoid building wing spar might dis solve its contents during flight samples balsa coated variety resins placed baby food jars containing candidate fuels array samples stored months backyard greenhouse exposure thermal cycling solvents brutal test Some combinations looked satisfactory dur ing winter turned messes July Sig Mfg Cos polyester finishing resin eventually chosen K&B finishing resin fared equally well test Scale modelers using chainsaw engines might find idea useful Its OK gasoline havent found resins will resist fuels containing nitromethane ether Engine modifications OS F560 engine received designed use glow plug ignition regular alcohol-based model fuel Gasoline far efficient alcohol glow plug ignition doesnt work well gasoline based fuels unless compression ratio increased point mechanical problems July 1982 133 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS 444444444* **4ATYOURFINoERTIPS4444MAYU* * Watch For**SHOWED ALLOY PARTS WITH* ***NO ORGANIZER AT OVER FIFTY* *Upcoming Ktsl**OOLLARS THAN TWICEOUR* *** 495* ****************44444444*444444* HSA735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST 2-56 3 16 SOCKET HEAD CAP SCREW 2-56 1 4 SOCKET HEAD CAP SCREW 3-56 I 2 SOCKET HEAD CAP SCREW 4-40 I 4 SOCKET HEAD CAP SCREW 4-40 1 2 SOCKET HEAD CAP SCREW 4-40 34 SOCKET HEAD CAP SCREW 4-40 1 SOCKET HEAD CAP SCREW 6-32 1 4 SOCKET HEAD CAP SCREW 6-32 I 2 SOCKET HEAD CAP SCREW 6-32 34 SOCKET HEAD CAP SCREW 6-32 1 SOCKET HEAD CAP SCREW 6-32 l SOCKET HEAD CAP SCREW 6-32 2 SOCKET HEAD CAP SCREW FLAT WASHERS SAE ZINC PLATED 2 4 iii~ PCS 25 25 25 20 20 20 20 IS 15 IS 15 15 15 75 50 75 90 TOTAL PCS 735 5 NYLON INSERT LOCK NUTS ZINC PLATED 2-56 4-40 6-32 * * * **** ********************* KITS COME COMPLETE WITH 18 COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER ONLY $2495 NEW THE POWRWIr%IC4ANDTHE RETRIEVER POW RWINCH perfect casanion * $27500 RErRThVER Both units use special plus shipping 4pole permanent magnet lc* current drain less battery 12 volt nortor design also inCnrpor ates lighteeight heavy duty welded arKi painted steel frane features adjustable nvtor sounting plate insure proper drive tension PCM R b mater unlimited ttnnaters WINaS has handle either ,u anythirsg between rid pro tected font switch operation ed towline druis a-sstruction required anti-kiting braking can readily disengaged e Manual drun brake retrieval takeup antrol 2000 feet braided nylon line tCs riixn ball-beering swivel bearing turnaround hub RETR EVER will eliminate losing turn frequency because long turnaround tines retrieving lines Line orossings due wind shifts using multiple winches will longer probl40n Best 11 have launch-a-minute capability Other features incltxle e Drag-free operation due flycasting imde Battery cables heavy duty clips feet braided nylon line ball bearing swivel Guide line aligrinent takeup nEsie nd prevent line tangling drive shaft WRITE FOR MORE I14FO1L&flON 4DAVEY $22500SYSTEMS plusmFinE CORPORATION shippingONE WOOD LANEMALVERNPA19355 * INTRODUCTORY PRICE 1982 134 Model Aviation severe Furthermore fuel-air mixtures become extremely critical Sensitive temperature humidity changes toyed enough Such ideas reach conclusion spark ignition its heavy coils radio interference problems bound better method So magneto coil flywheel grass trimmer engine Lawn Boy part #06823-07 -08 mounted front housing flywheel originally round cut dumbbell shape reduce weight Warning Dont try dodge engine turns up usual 9000 rpm dumb bell will fly apart prove have paint can hole waste basket large bulge sand annulus between containers Some sand flew out top flywheel broke Taking fatigue account wouldnt trust thing above 5000 rpm Top speed engine 16 x 10 hand-carved propeller around 4500 rpm coil called solid-state magneto spark discharge triggered same magnetic flux energizes coil inner secrets device seem proprietary two important observations can made knowing exactly works 1 no points wear Out 2 generates milder form radio-frequency noise either point systems capacitance discharge systems RF noise can effectively suppressed putting 10K resistor series plug putting shield over high-tension lead Until about 1979 engines being massproduced hobby use two-stroke type until flight 1981 World Records Power categories estab lished such engines Although experi mented earlier homemade four-stroke engines have better fuel efficiency perfecting engine Duration takes lots spare parts no serious effort made use such design until OS FS6O appeared engine remarkably well built have run 400 hours bearings piston fit compression practically good new Some problems however showed up valve/rocker-arm/cam system partly because very little lubricant being used effort attain high fuel efficiency Valve clearances reset three hours after 24 hours pushrods too short permit further adjustment problem partially fixed weakening shortening valve springs replacing pushrods pieces Allen hexwrench material 5/64 across flats tips pushrods tips cam follower pins hardened heating microtorch about 16000F near orange glow quenchingwith water No annealing tempering done after quench Next valve-drive cam started wear problem mitigated adding oil fuel drilling small breather hole crank case aft cam Oil thereby blown through cam housing splattering oil made new black mess inside models nose now valve system good 50 hours between adjustments next problem Carbon build-up valves spark plug choked engine stop about 10 hours unless baby-sat gradually backed out needle valve reached old bag tricks polyisobutylene chemical used manufacture synthetic rubber viscous liquid does pretty good job lubricating metals instead producing carbon particles cracks mostly combustible hydrocarbon molecules heated Presto Very little carbon formed fuel efficiency increased composition fuel 93% premium grade Mail YOUr Order To* Please Include $250 postage HARDWARE SYSTEMS handling 42a WushingRon Ave S.* Add $150 COD Eden Prairie Mm. 55344* Minn realdenta add 5% sales tax * Orders will shipped within 48 Phone *129418757hours INDIAN CITY RADIO CONTROL CLUB Presents DETROIT EXPO IV Greater Michigan Modelers Show PLANES BOATS 0 CARS MANUFACTURERS STATIC DISPLAYS0 SWAP-SHOP October 123 1982 Eight Mile Artillery Armory Oak Park Michigan Info 6909 Monroe Blvd Taylor MI 48180 U U U I I I like world-taits actual-Sullivan Insta-Just Plstk Conoar Starter. ine Handles feel good tn serve Hook hand can adjus*t quick Dattery itll 38$ IJ-2 especially suiia$e inftaine Incredible ill fit sizes Grab hold starter can shake huNts 5suppliesup ds enginesand unleaded gasoline 7% polyisobutylene tedious work dealt carbure tor standard RC-type needle valve could have installed would have defied simpli city rule Besides hearing poor US FS6O very quiet engine Instead built-in means keeping fuel-air ratio constant throughout power range sought car buretor 15cc OS 10 engine adapted inlet manifold mercury ma nometer attached monitor inlet-manifold pressure fuel fed engine via float chamber 50cc graduated burette needle valve first adjusted lean smooth running full throttle periodic readings rpm manifold pressure fuel level burette number proportional fuel-air ratio calculated Additional sets data recorded lower throttle settings fuel-air ratio never came out constant stock carburetor Usually mixture became very rith low power peculiarly-shaped notch carburetor barrel needed notch shape found grinding little testing fuel-air ratio over whole rpm range grinding little testing again etc etc got right third carburetor fifth weekend during long procedure got absent-minded forgot propeller revving front Ouch Shake shake shake Eventually continuous hands-oft run 50 hours duration made run engine mounted aircraft suspended elastic lines allow entire flight-ready assembly vibrate airborne often hears builder new airplane exclaim flew right off drawing board effusion signifies bad consisted Kraft 533 FM receiver Ace Bantam Midget servos placed far aft reduce chances ignition noise would Continued page 142 July 1982 135 IL GRAB HOLD ly iii th Sri I I I I I I I I I I practice really ought hang up new model shake about 15 minutes per pound before trying fly Controls fuselage radio equipment V -NW yone Sec after 100 pm September 22 touchdown Open apace available landing model chose sit down cook tent PAl rules require landing within 500 meters launch point spot within 10 meters although embarrassing acceptable No damage iota fuel left tank wuniversai type ror encauseg cowls Thrse tail tubes suit engine position Seiect tail pipe remove others desired 0 Small Compact easy attach Tsil pipe extension Included AII mounting hardware clamps screws included THREE SIZES EM-I -19 . 1195 EM-2 -40.. 1295 EM-345.80. 1430 leading dealers available ORDER DIRECT Add 10% postage handling Calif residents add 6% tsi Check Cod accepted_Supply card number date ViSi_or MASTER CARD manifold fit scale model cowls TWo exhaust tubes allow maximum sxhaust removal less heating PITTS STYLE MUFFLERS OFor scale aircraft such PiflS CESSNA 150 Angied exhaust tubee exit bottom cowling OWorm drive mounting strap OTait pipe extensions -. mounting hardwan -1 cause jitter excessive current drain servos As turned out precaution really necessary because very effective shielding eventually installed nickel-cadmium batteries special Hi-Rate type obtained Ace Radio Control can withstand severe over charging no need voltage regulator telemetering unit sensed current flowing out batteries monotonous musical note ground-based receiver gave pleasant assurance well board Servo motions could detected superimposed buzz since charging cur rent changed engine rpm pitch tone indicated engine speed Interference glitching due weak signals could also detected presence scratchy noise ominous sound wasnt heard during record flight polyhedral wing minimizes spiral instability basic model fuel shifting side wing other during uncoordinated turns generates quite load rudder work pilot So electrostatic stabilizer78910 used automatic wing leveling total weight system 1 oz equal hours worth fuel good trade Devices type can also used stabilize pitch attitude feature omitted instance Instead long tail large stabilizer used simple expedient provided substantial margin inher ent pitch stability precluded potential troubles related servo wear extra current drain active pitch stabilization loop Practice practice practice trials work air bugs out system com ponents installed model made relics left over 1960s record attempts flights during dusk dawn periods airplane cannot seen very well neither dark enough see small red green white navigation lights electrostatic stabilizer found big help during periods well during night visual determina tion attitude airplane based solely orientation three tiny candescent bulbs planned flight altitude about 1500 ft above ground 2000 ft above sea level array closely spaced color contrast strongly discernible staring star-like wanderers amongst Orion other rocks heavens hypnotic effect mesmerized keyed-up senses limit three four hours However FAI rule states no assistant pilots allowed use control transmitter electrostatic stabilizer served very effectively towards over coming roadblock Instead having pay attention compensate spiral instability able close eyes relax chaise lounge momentarily pulse control stick hard over response verbal commands observers could staring relays So cat skinned pretested equipment transferred new airframe July 4 baptismal flight mid-August assembly tortured 75 hours ground 25 hours air confidence machine very high remaining task flying 20 hours official witnesses would call some truly dedicated people Exciting boredom what John Worth called during previous 1964 record flight Care taken pick helpers officials qualities included patience stam ina sense humor Weather loomed last barrier model strong enough withstand fairly severe turbu lence avoid unpredictable thunderstorms keep pilots work acceptable level seemed wise wait calm characteristic equinoctial highs convectively stable masses hot air frequently stagnate area during last half September Synoptic weather information sources watched signs usually precede favorable conditions September 12 1 3 great crew officials off Bealeton VA running DCRCs annual Scale competition Wouldnt know year series rapidly-moving cold fronts followed September 20 crew gathered under drizzling clouds went through test run official weighing launching timing procedures next afternoon occluded front stretched east-west Kansas City Philadelphia rain 100 miles north field decided see far could get though 15-mph wind southeast partial overcast gray strato cumulus clouds Usually such conditions get worse before get better Rain high winds expected unless front changed its direction record flight launch went off planned 5 pm sundown 730 pm clouds cleared wind dead calm ground obviously flow 1500 ft model sat nearly stationary its airspeed matching wind must have near 20 mph southeast 830 pm observer method working well clear star-laden sky Two artificial satellites seen about time boredom relieved philosophical 142 Model Aviation I I Plasticote Propeller OR LARGE new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER LIGHTER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 discussions inspired sightings couple old Sputnik jokes came out woodwork too like Hey did hear Russians put 10 cows orbit say its herd shot round world midnight observers practiced giving yaw pitch trim commands competing see could hold new constellation stationary longest period long times could mistaken star got little sleepy missed few commands stir attention George Pickrell jumped up onto box bellowed Holy cats three guys coming over hill camels Theres nothing like healthy guffaw keep party alive About 2 am heavy ground fog formed stayed through night never grew thicker about 75 ft Sideways visibility 50 ft would have no way accom plish safe landing engine failed Vertically navigation lights stars could seen through cone-shaped hole 5 am wind aloft shifted west Hooray front moving away visibility cone however diminished about 200 included angle Ground equipment crew blankets soaked dew tension building because never flown through very foggy dawn six pairs eyes two pairs field glasses made 9 am thermal convection winds about 10 mph ground level causing model bounce nighttime observer procedure abandoned 1030 husky bumps causing excessive currents electrostatic stabilizer system aid shut down 1 pm 3V3 hours past prior record airplane performing admirably telemetry saying everthings fine grumpy over one-pilot rule otherwise felt OK landing 500 meters launch would scrub record claim decided wed done enough pushed engine shutdown button gust blew airplane onto collision couse wifes shiny new Honda during final approach interest continued harmony no choice except pull up over car model ignominously impaled corner pole cook tent 10 meters launch point home nonetheless valid claim record Inferred results implications gross takeoff weight model 498kg 1096 lbs 173kg 61 oz fuel model landed little half 089kg3 oz fuel still tank Thus model has theoretical capability flight excess 40 hours models gas mileage figure 1500 mpg its estimated FAI legal range wind nearly 1000 miles fuel consumption rate 42 gm/hr 15 oz/hr impressively low no miraculous engine efficiency involved performance As evidence consider following points model flown about 25 mph through flight probably has liftto-drag ratio about 10 speed Assuming propeller efficiency about 05 specific fuel consumption can calculated about 103 lb/hp-hr rae about 10 times smaller what goes nto two-cycle engines alcohol still nearly twice some larger four-cycle engines used manned air craft Further improvements engine therefore theoretically possible would easily achieved small size Continued page 146 Its incredible heres true Epoxy Paint thats Pre-mixed 000 can! 0@ RITES BLACK AARON PueIPrc42 pa Tnt No pot life ixing proof Lightweight r tough a Flexible C@/ERITE 420 BABYLON ROAD/HORSHAM PA 19044 Model Ii S th I10 5O1 4O IJ Local Dealer Send $1 00 Catalog Juiy 1982 143 System Hi-Starts 101 Ceeaplet Nt-Seen Kit Mie AeceenEly 14 Pound Pull tOO Feet Sleet Surgical Late Continuous Piece Section Reel Line Chute Stoke Tow Rings Hardware elig240o 102 Coenplcee 2-Mete Hi-Stan Kit 5 Pound Pill hO Feet 1 4 inch Slack Late Reel Line Chute Stake HardwCrC Etc $1700 103 Splaoetet Tobeg Opees Cl. Type tOO Feet Slack Surgical Late. 14 lb Pull $1800 104 Seplaoeerel Tebing 2-Megee S lb Poll S 500 10$ Nylee Hi-Stan UeeTwitted S 326 55 lb Test White ColorStaided g42S 106 Steedeed Pereehot Sd Celee Tow SinS5 325 105 Reel SiC Poe Hi-Stan Oteok Wied-UpLarge $ BOO CeterpletO Teogh Pleohe HdweeSmall 5 450 System II Winch 111 Pro-Lasech Coerteat WieOtt Mb ho Keen Edge State 01 art comelernlc ready-to-use less hatternI 12 oclt nonahie winch ncudecwheelc handle motor tuct twIn h reel ritnarcund oIl electrical wiring lice chute Hock-nc hatterc end ccii readn Ic fly S2$$00 112 Pre-tasech Wktch Preen. Seal Tureeroced includes drilled Iroere reel turnarnundS cairo $15000 107 Winch Cleat 18 led Ojeeseter 230 lb Teet Heauc DuIn Tow Sing Connecting Ring $825 105 Wiech Line 2000 Cl Scaided Nylee $3 lbTeet$1500 Choice ci Pill Test White Colot 1 tS lb Test $2000 Top Ouclito Acailable Soacral 153 lb Test $2600 Orders Othet Listed 180 lb Test $3200 System III Power Pod 110 Powee Pod desigeed Ed Ceontghtl Icr 2-mole sci Iclaces lihergiacs huill- ecira tank allowS tO mint- engine run fur use OdS metal lank engines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 P011 IN 47454 ELECTRONIC SERVICENTER FACTORY AUTHORIZED WARRANTY SERVICE FOR KRAFT over 35 other manufacturers Cleaning adjustment nsmitter receiver up 4 servos $2500 plus parts 24 HOUR SERVICE74 ZOUR SERVICE NEAL WARREN ~c13 South 21st Street Sp Philadelphia PA 19103 Tel 215 564-0800 Mon-Fri 9AM-53OPM Wed night till 8PM Sat 9AM Noon KIT S 9 Hi GLIDERS 3 SATELLITE KITS 17 OLD TIME GAS Send 25 for5 RUBBER 3 NORDICfine instruments 1980 catalog9 COMPETITION GASsmall craft & aircraft design FUEL DT TIMERS -$1075 eachOur comprehensive catalog return F Al Model SupplyBox 1534 Southold NY Ei P0 BOX 3957TORRANCE CA 90510inc 11971 516 765196Oar interesting Speculate what kind per formances might obtained all-out legal FAT model Suppose example spindly toothpicky monster model utmost structural efficiency made instead fairly robust Also assume use carbon fibers Kevlar titanium samarium cobalt magnets lith ium batteries solar cells tough microfilm coverings Further make tandem wing maximum allowable arear course install lightweight electrostatic pitch stabilizer allow equal loading both surfaces Work improving specific fuel consumption fly still slower speed long might fly Two hundred hours seems possible far Capa bility non-stop San Francisco Boston flight would reasonable expectation matter would New York Paris flight would some very difficult logistics problems associated such attempts have absolutely no interest trying prove can stay awake longer somebody elseso Itm inclined try something easier like tuming electrostatically- stabilized machines loose upper end Grand Canyon terrain avoidance features stabilizer would automatically steer machine down valley70 Wetd launch Moab UTr hop jet HooverDam sit inabartellingflyingstories waiting machine arrive day later Another dream another time Acknowledgements officials observers provided valuable help encouragement during record flight also during preparatory test flights am very grateful patience humor hard work contributed Mr Charles Calvert Contest Director Mr Wayne Simpsonr Mr Jack Anglin timers Mssrs Michael DeMuth George Pickrell Glen Scillian official observers pilOtrs assistants Helpful advice about lubrication problems obtained Mr Don Lindley Amoco Research Laboratories Mr Ray Cramer provided useful consultations aerodynamics Valuable technical assistance contributed members District Columbia Radio Control Club DCRC particular Mr Ben Givens worked telemetry devices Messrs Melvin Newcomer William Charbonneau Robert Lee assisted design fabri cation electrostatic stabilizer other electronic units Mr Paul Nash granted use runways gliderport Brookeville MD facility valuable asset project Mrs Lillian Goldfinger Johns Hopkins Uni versity Applied Physics LabAPL made useful suggestions patiently typed badly scribbled drafts Dr Gordon Dugger APL edited improved original manuscript effot greatly appreciated References I Hill ML. Beat RuSsians Bust Model Airplane News Vol 72 No Feb 1965 p 28 2 Hill ML. 27000 Feet Its Catbird Country Fisning Models #406 Jan 1971 p 18 3 Hill ML. Shuffle Off Buffalo Model Air plane News Vol 73 No 2 Feb 1966 p 30 4 Hill ML. II l Hours Exciting Boredom Firing Models #390 Sept 1969 p 6 5 Hill M L Tonoise World Speed Record Model Elsing Models *359 Jan 1967 p 20 6 Hill ML. Bong Boomer World Record Soaring Glider Fisring Models #360 Feb 1967 p 9 7 Hill ML. Introducing Electrostatic Autopilots Astronautics Aeronautics Vol 10 No 1 Nov 1972 pp 22-31 8 Hill ML. Electrostatic Autopilot RC MOdelsrr Flying Models #431 Feb 1973 p 20 9 Hill ML. Design Performance Electro statically Stabilized Delta Planform Mini RPVs Con ference Proceedings Milirarsr Electronics Defense Ex position Wiesbaden Germany Oct 977 Injeravia SA Geneva Switzerland pp 847-861 10 Hill ML. Whyte TR. Weiss RO. Rubio R Isquierdo M.Use Atmospheric Electric Fields Vertical Stabilization Terrain Avoidancerr Pro ceedings ofAJAA Guidance & Control Conf Albu querque NM. August 19-21 1981 ATAA Paper *81-I 848-CP AMA Building/Mankowski Continued page 45 New Chaiter Members AMA Builders plaques recognizing $500 contributions Ilsis lnonth Free Flight Model Airplanc Association Southern California Northern Virginia Radio Control Inc Detroit Aero Modeler RCr tner Robert Reder Walter Hartung Contributing Members Honor Roll listing donations $100 up now included Sooner Circle Burners Kennebec Valley Mod el Avialors Twin City Radio Controllers Inc l-lightmasters Klamath Falls Cincin nati Aero Modelers San Gabriel Valley RC League WINGSr Tidewater RC Club Ever green Radio Modelers Association Monmouth Model Airplane Club Skylarks Sharon McDonnell-Douglas RC Club Memphis Prop Rusters Niagra County RC Club Sacramento RC Club Reno Radio Control Club Greater Cincinnati RC Arvada Associated Modelers Goodyear Model Aircraft Club Niagara Sun day l1rers Inc Pomona Valley Model Air plane ClObr Riverside RC Club again Alfred Twyla Lchmberg Robert Krafft Carl Otto Margaret Walinski John Williams John Grigg Ed Louise 146 Model Aviation PRC LRUflCH SYSTEMS Rugged Simplicity Top Performance Reasonable Price Oreect 5alee/ Ida MiddleMen/Hi-5taetoAle KitFoemftd Minute Aasewblv 7 Coerplete looteuctruce Included No special 71010 Regoreed / Seod SANE Fun Funhen lirfeematron Ordee List peodoots Total / Add S200 Skipping gend Menen aede Cheeb CreditCord Notetbet end Eep Data/COO Add 5150/ Aleska Add 5350 / Hawaii Will COO Shipping Mail ot Phone I Wiech OtiterePegeteet Adneeco Will COO Phone Orders Waloerne / Mail Order Phone Orders nS/ Welcome
Edition: Model Aviation - 1982/07
Page Numbers: 78, 79, 80, 81, 133, 134, 135, 142, 143, 146
NO OCR TEXT Victory brings out smiles faces tired crew after 20-hr flight near Brookeville MD September 21-22 1 gai DCRC members worked hard during preparatory flights well official attempt Left right Mike DeMuth pilots assistant Jack Anglin Wayne Simpson timers Maynard Hill pilot George Pickrell Charlie Calvert CD Glen Scillian assistant CD Secrets success revealed test took literally years planning new FAI Dura tion World Record just over 20 hours powered RC models pilot estab lished last Septem ber lot problems solved keep model airthat long man set record describes prob lems trials errors eventual success unique flying machine planes may seem ugly facts boxes dont try move too fast Mother Nature puts some beautiful useful curves invisible air flowing near Inside boxes Well New Faithfuls internals also lessthan-elegant appearance Wires springs fuel tubes lacing cords shock-mounted para phernalia tangled end end scene included few splotches dried blood deposited evidence elbows propellers dont mix Any way look machine beautiful accurate adjective something admirable about way models guts frame muscles operated produce desired performance Twenty-five explosions per second shook machine like being hit tympanists mallet mezzo-forte Cranks turned valves slid bearings twirled gears whined sparks zapped springs twanged pushrods rocker arms beat tickety-tack rhythm against drone vibrating drum-tight skins cacaphony compounded whooshing propeller piccolo-like whistle air rushing tiny carburetor Indoors trillions electrons shoved alternator through maze diodes chips chokes connector plugs rainbow-colored harness wires move motors gears July 198279 Truss structures false ribs holey main ribs balsa box fuel tank visible shot Fuselage bottoms wing tips andstab covered wIth white opaque MonoKote remainder translucent orange scheme viewed best compromise visibility night during day Lights located teardrop-shaped lenses wing tip under stab Dark patches wing tips copper tape Staticmaster ionizers used part electrostatic wing leveller Flywheel magneto look like ugly bulges aerodynamic penalty small linkages Incandescent lights glowed wing tip atmospheric ions also being interrogated get reports bank angle happened comfortable womb laboratory out Mother Natures soggy foggy bumpy atmosphere very gratifing experience coax machine through two million thumps missed beat project hobby venture extraneous authors profession deals development remotely-piloted vehicles goal fly long time approach keep simple schedule whenever ready motivation fun Some aeromodeling techniques equipment employed may practical interest responsible developing long-duration drones unmanned vehicles UVs com munication relays decoys surveillance elec tronic countermeasures other uses idea model airplane technology might used reduce cost operational military systems very popular early 70s mixed reviews its merits have cropped up because some goals expectations went out bounds Perhaps article will bolster fundamentally sound idea would gratifying result However inside out side secrets New Faithful will exposed primarily help modelers also perhaps steer few fun breaking records Features New Faithful crate-like appear ance New Faithful consequence FAI rule limits Scale models gross takeoffweight 5 kg 1102 lb Aerobatic racing models seldom approach limit Duration models restriction means way increase fuel capacity decrease structural weight Engine displacement limited 10cc 061 cu lifting surface areawing tail restricted l5m sq 1615 sq ft neither rules influenced design wing sized fit inside Toyota Hatchback although largest per missible engine installed normally loafed 80 Model Aviation Left Charlie Calvert CD congratulates Maynard Hill Lots things have changed since similar picture made Frank Ehling Hill Old Faithful September1904 Planes look alike bellies larger important valuable changes have brought hobby AMA Only 18000 members got black-and-white pamphlet 1964 AMA close trouble now iargest sport aviation organization world Modified 05 FS6O used New Faithful mounted horizontally vibration dampening Reworked 05 10 throttle used Text explains lubrication wear problems magneto-flywheel spark ignition system Warningread text about flywheel shape Vibration testing done hanging model coat hangers foam pads elastic lines running ceiling back porch Hill FlyBy Night Aircraft Co Tail tied spring-loaded storm door door opening used approximate prop thrust Fuel frothing servowear other problems can detected method author recommends forchainsaw-powered models New Faithful wentthrough continuous 50-hour run prior its first test flight along 20% full power model size configuration could probably climb Out gross weight 11 lb loaded maximum fuel would have potential flight 200hr duration 6400-km 4000-mi range FAIs technical rules sensible promote safety provide common basis world-wide comparison generate some tough challenges rule permits pilot handle radio controls however would have repealed Duration records much beyond present made possible Editor FAIModel Committee ClAM has agreed provide pilot relief during such record attempts Subject approval overall FAI Sporting Com mittee will effective 1983 Development airplane matter putting some old principles together func tional way Reliability obtained fixing changing things failed during hours testing approach solving problems always seek simpler principle rather add complicated parts key functional components shown structural drawing engine modified 05 FS6O FS means four-stroke Fuel fed carburetor tank wing Fuel flow rate pressure steadied inter dicting float chamber Herein lies reason droop snoot Gravity dependable pumps modified bicycle alternator connected engine power takeoff through 21 step-up gear train Electric power alternator rectified dc filtered choked RF delivered aft under stabilizer RC receiver servos set small 100 mAh nickel-cadmium batteries located batteries provide safe landing case engine failure alternator powers control equipment three tiny lights needed wing tips tail night flying Also wing tips Staticmaster ionization units used electro static autopilot senses vector electric field exists atmosphere thereb4 Jrovides automatic leveling wings l telemetry transmitter hangs its dipole antenna station forward electrostatic stabilizer shown another vital unit Kraft transmitter flight tied automobile battery Thats put fuel tank spin prop life thing sustains itself least 20 hours airframe Balsa wood bridge-truss structures efficient easy build Streamlining boxes would add weight worth category competition Most airframe made ofcontest grade balsa coveringis Top Flites MonoKate fuselage outer wing panels stabilizer white opaque remainder translucent orange combination chosen best compromise daytime nighttime visibility bridge-truss spar wing front member protrudes way promotes early Onset turbulence boundary layer Usually airplane designers try keep boundary layers laminar over first half wing chord slow-flying models its easy induce laminar boundary layer persist too far flow can separate easily rear portion airfoil separation occursand probably will bumpy air en counteredthe result can drag force consid erably larger associated tripped turbulent boundary layer tends stay attached fuel tank does double duty center wing spar assembly 1/16 00 e 00 OCo tii~n 332 v0r 322 t8t5 23 212334 25 2357 5 10 1112150 O Propellor 16 dia tO pitch O Magneto & flywheel 05F560 engine modified @ 0S10 carbureto, modified Cam housing rea power take-off Filler made-from chemists filter paper O Float chamber Flearbie coupling rubber auto fuel hosel Two utep op gear train Fleoible coupling tygon tuhiegi Bicycle alternator @ Rectifier filter 6J Filters mesh iretal 3 200 mesh nylon er paper 062 Fuei tank sump also main center spar Telemetry transmitter j Incandescent bulbSO ma @SV red & greee lenses Stattcmaster 2y 500 ionizer Grounded guard strip copper tapel Auxiliary collector copper tapel @ Electrostatic autopilot Same 16 white lens @ Throttle serno Elevator rudder servos Kraft KP7F receiner @ Battery pack 1100 maHi NEW FAITHFUL cture componBnt layout sheets contest grade balsa coated internally epoxy resins impervious gasoline polyester resin covered externally fuel discussed later failures can result single layer fiberglass i/a oz/sq yd impreg- additions nitromethane propylene oxide ether nated same resin Most polyester Continued page 133 July 198281 Super Mini Boy Recommended Eigines Radios- Mufflers Helicopter tools stock Worlds stable easiest fly small 40 size R/O Helicopter Low maintenance mechanics engineer ed Dieter Schiuter Father RIO Helicopters Features fully collective Bell mixing main rotor head upright spinner starting straight shaft driven tail rotor & automatic compensation symmet rical prebuilt main rotor tail rotor blades autorotation clutch Uses standard 4 chanel radio Kits parts stock guarantee helicopters fly Ask man flies Move up Schiuter inSifrp U SEAN IflG subsidiary MINIATURE AIRCRAFT 2594 North Orange Blossom Trail ndo FL 32804 Phone 30514224531 test fuselages six flight fuselages high-altitude version Ranger V- 12 seriously delayed XP-77 use low-altitude engine its performance would inferior fighter airplane comparison existing models now production ac cording USAAF Technical Report #5359 Vidal Research took over job building wings made schedule slip Problems arose over matters basic time needed spread glue Completion first airplane delayed February 1944 Marcfr would make almost 1 years late wasnt until April Fools Day 1944 XP-77 flew Bells Niagra Falls NY factory Success last Far proto type arrived Wright Field May 2 soon revealed serious vibration 1700 rpm 2300 rpm probably due lack shock absorbers engine mounts June 6 1944 Allied troops storming Nor mandy beaches final assault Nazi-held Europe USAAF got around giving prototype XP-77 its serial number 43-34915 Official flight tests carried out Eglin Field FL second XP-77 43-34916 starting late July 1944 October 2 airplane fell out Immelmann turn inverted spin pilot recovered air plane went upright flat spin could recover forced jump pilot landed safely airplane demolished proved last straw project ended December 2 March 1945 war drawing close Army Air Forces completed report Flight Tests Bell XP-77 Airplane following has excerpted general handling characteristics XP-77 airplane satisfactory although restric tions evented dives spins violent maneuvers jectionable feature control system fixed trim tabs ailerons rudder results condition flight airplane will fly stick- rudder-free ground setting the. tabs Visibility good conditions flight ground handling Noise vibration cockpit considerable cockpit becomes very cold uncomfortable cold weather high altitude cockpit heat available high speed 328 mph obtained military power 3150 rpm 416 mani fold pressure 12600 ft critical altitude high speed 330 mph obtained war emergencypower 3300 rpm and57 at4000 ft critical altitude maximum rate climb obtained war emergency power 3630 feet per minute critical altitude 2000 ft ConclusionsThe overall performance XP-77 airplane inferior present fighter aircraft employed AAF results flight tests considerably lower estimated performance set Bell Aircraft Corp maximum speed airplane war emergency power considerably lower other AAF interceptor aircraft operating military power maximum rate climb military power very low interceptor air craft low service ceiling airplane renders useless against high altitude aircraft bad XP-77 fell 90 mph short its promised top speed rate climb no better 200-hp Pins Special aerobatic biplane service ceiling 30000 ft era P-38s would go 39000 ft P 51s would top 40000 ft interesting idea didnt work taught its creators lesson very very difficult build truly lightweight fighter plane General Dynamics learning lesson over again its F- 16 no longer lightweight Mach 2 ter course doesnt make sense give up such worthy goal As matter fact start Cassutt will close 250 mph 135-hp weighing little over 500 lb add couple machine guns some fuel radio two ours/Hill Continued page 80 other useful ingredients avoid building wing spar might dis solve its contents during flight samples balsa coated variety resins placed baby food jars containing candidate fuels array samples stored months backyard greenhouse exposure thermal cycling solvents brutal test Some combinations looked satisfactory dur ing winter turned messes July Sig Mfg Cos polyester finishing resin eventually chosen K&B finishing resin fared equally well test Scale modelers using chainsaw engines might find idea useful Its OK gasoline havent found resins will resist fuels containing nitromethane ether Engine modifications OS F560 engine received designed use glow plug ignition regular alcohol-based model fuel Gasoline far efficient alcohol glow plug ignition doesnt work well gasoline based fuels unless compression ratio increased point mechanical problems July 1982 133 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS 444444444* **4ATYOURFINoERTIPS4444MAYU* * Watch For**SHOWED ALLOY PARTS WITH* ***NO ORGANIZER AT OVER FIFTY* *Upcoming Ktsl**OOLLARS THAN TWICEOUR* *** 495* ****************44444444*444444* HSA735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST 2-56 3 16 SOCKET HEAD CAP SCREW 2-56 1 4 SOCKET HEAD CAP SCREW 3-56 I 2 SOCKET HEAD CAP SCREW 4-40 I 4 SOCKET HEAD CAP SCREW 4-40 1 2 SOCKET HEAD CAP SCREW 4-40 34 SOCKET HEAD CAP SCREW 4-40 1 SOCKET HEAD CAP SCREW 6-32 1 4 SOCKET HEAD CAP SCREW 6-32 I 2 SOCKET HEAD CAP SCREW 6-32 34 SOCKET HEAD CAP SCREW 6-32 1 SOCKET HEAD CAP SCREW 6-32 l SOCKET HEAD CAP SCREW 6-32 2 SOCKET HEAD CAP SCREW FLAT WASHERS SAE ZINC PLATED 2 4 iii~ PCS 25 25 25 20 20 20 20 IS 15 IS 15 15 15 75 50 75 90 TOTAL PCS 735 5 NYLON INSERT LOCK NUTS ZINC PLATED 2-56 4-40 6-32 * * * **** ********************* KITS COME COMPLETE WITH 18 COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER ONLY $2495 NEW THE POWRWIr%IC4ANDTHE RETRIEVER POW RWINCH perfect casanion * $27500 RErRThVER Both units use special plus shipping 4pole permanent magnet lc* current drain less battery 12 volt nortor design also inCnrpor ates lighteeight heavy duty welded arKi painted steel frane features adjustable nvtor sounting plate insure proper drive tension PCM R b mater unlimited ttnnaters WINaS has handle either ,u anythirsg between rid pro tected font switch operation ed towline druis a-sstruction required anti-kiting braking can readily disengaged e Manual drun brake retrieval takeup antrol 2000 feet braided nylon line tCs riixn ball-beering swivel bearing turnaround hub RETR EVER will eliminate losing turn frequency because long turnaround tines retrieving lines Line orossings due wind shifts using multiple winches will longer probl40n Best 11 have launch-a-minute capability Other features incltxle e Drag-free operation due flycasting imde Battery cables heavy duty clips feet braided nylon line ball bearing swivel Guide line aligrinent takeup nEsie nd prevent line tangling drive shaft WRITE FOR MORE I14FO1L&flON 4DAVEY $22500SYSTEMS plusmFinE CORPORATION shippingONE WOOD LANEMALVERNPA19355 * INTRODUCTORY PRICE 1982 134 Model Aviation severe Furthermore fuel-air mixtures become extremely critical Sensitive temperature humidity changes toyed enough Such ideas reach conclusion spark ignition its heavy coils radio interference problems bound better method So magneto coil flywheel grass trimmer engine Lawn Boy part #06823-07 -08 mounted front housing flywheel originally round cut dumbbell shape reduce weight Warning Dont try dodge engine turns up usual 9000 rpm dumb bell will fly apart prove have paint can hole waste basket large bulge sand annulus between containers Some sand flew out top flywheel broke Taking fatigue account wouldnt trust thing above 5000 rpm Top speed engine 16 x 10 hand-carved propeller around 4500 rpm coil called solid-state magneto spark discharge triggered same magnetic flux energizes coil inner secrets device seem proprietary two important observations can made knowing exactly works 1 no points wear Out 2 generates milder form radio-frequency noise either point systems capacitance discharge systems RF noise can effectively suppressed putting 10K resistor series plug putting shield over high-tension lead Until about 1979 engines being massproduced hobby use two-stroke type until flight 1981 World Records Power categories estab lished such engines Although experi mented earlier homemade four-stroke engines have better fuel efficiency perfecting engine Duration takes lots spare parts no serious effort made use such design until OS FS6O appeared engine remarkably well built have run 400 hours bearings piston fit compression practically good new Some problems however showed up valve/rocker-arm/cam system partly because very little lubricant being used effort attain high fuel efficiency Valve clearances reset three hours after 24 hours pushrods too short permit further adjustment problem partially fixed weakening shortening valve springs replacing pushrods pieces Allen hexwrench material 5/64 across flats tips pushrods tips cam follower pins hardened heating microtorch about 16000F near orange glow quenchingwith water No annealing tempering done after quench Next valve-drive cam started wear problem mitigated adding oil fuel drilling small breather hole crank case aft cam Oil thereby blown through cam housing splattering oil made new black mess inside models nose now valve system good 50 hours between adjustments next problem Carbon build-up valves spark plug choked engine stop about 10 hours unless baby-sat gradually backed out needle valve reached old bag tricks polyisobutylene chemical used manufacture synthetic rubber viscous liquid does pretty good job lubricating metals instead producing carbon particles cracks mostly combustible hydrocarbon molecules heated Presto Very little carbon formed fuel efficiency increased composition fuel 93% premium grade Mail YOUr Order To* Please Include $250 postage HARDWARE SYSTEMS handling 42a WushingRon Ave S.* Add $150 COD Eden Prairie Mm. 55344* Minn realdenta add 5% sales tax * Orders will shipped within 48 Phone *129418757hours INDIAN CITY RADIO CONTROL CLUB Presents DETROIT EXPO IV Greater Michigan Modelers Show PLANES BOATS 0 CARS MANUFACTURERS STATIC DISPLAYS0 SWAP-SHOP October 123 1982 Eight Mile Artillery Armory Oak Park Michigan Info 6909 Monroe Blvd Taylor MI 48180 U U U I I I like world-taits actual-Sullivan Insta-Just Plstk Conoar Starter. ine Handles feel good tn serve Hook hand can adjus*t quick Dattery itll 38$ IJ-2 especially suiia$e inftaine Incredible ill fit sizes Grab hold starter can shake huNts 5suppliesup ds enginesand unleaded gasoline 7% polyisobutylene tedious work dealt carbure tor standard RC-type needle valve could have installed would have defied simpli city rule Besides hearing poor US FS6O very quiet engine Instead built-in means keeping fuel-air ratio constant throughout power range sought car buretor 15cc OS 10 engine adapted inlet manifold mercury ma nometer attached monitor inlet-manifold pressure fuel fed engine via float chamber 50cc graduated burette needle valve first adjusted lean smooth running full throttle periodic readings rpm manifold pressure fuel level burette number proportional fuel-air ratio calculated Additional sets data recorded lower throttle settings fuel-air ratio never came out constant stock carburetor Usually mixture became very rith low power peculiarly-shaped notch carburetor barrel needed notch shape found grinding little testing fuel-air ratio over whole rpm range grinding little testing again etc etc got right third carburetor fifth weekend during long procedure got absent-minded forgot propeller revving front Ouch Shake shake shake Eventually continuous hands-oft run 50 hours duration made run engine mounted aircraft suspended elastic lines allow entire flight-ready assembly vibrate airborne often hears builder new airplane exclaim flew right off drawing board effusion signifies bad consisted Kraft 533 FM receiver Ace Bantam Midget servos placed far aft reduce chances ignition noise would Continued page 142 July 1982 135 IL GRAB HOLD ly iii th Sri I I I I I I I I I I practice really ought hang up new model shake about 15 minutes per pound before trying fly Controls fuselage radio equipment V -NW yone Sec after 100 pm September 22 touchdown Open apace available landing model chose sit down cook tent PAl rules require landing within 500 meters launch point spot within 10 meters although embarrassing acceptable No damage iota fuel left tank wuniversai type ror encauseg cowls Thrse tail tubes suit engine position Seiect tail pipe remove others desired 0 Small Compact easy attach Tsil pipe extension Included AII mounting hardware clamps screws included THREE SIZES EM-I -19 . 1195 EM-2 -40.. 1295 EM-345.80. 1430 leading dealers available ORDER DIRECT Add 10% postage handling Calif residents add 6% tsi Check Cod accepted_Supply card number date ViSi_or MASTER CARD manifold fit scale model cowls TWo exhaust tubes allow maximum sxhaust removal less heating PITTS STYLE MUFFLERS OFor scale aircraft such PiflS CESSNA 150 Angied exhaust tubee exit bottom cowling OWorm drive mounting strap OTait pipe extensions -. mounting hardwan -1 cause jitter excessive current drain servos As turned out precaution really necessary because very effective shielding eventually installed nickel-cadmium batteries special Hi-Rate type obtained Ace Radio Control can withstand severe over charging no need voltage regulator telemetering unit sensed current flowing out batteries monotonous musical note ground-based receiver gave pleasant assurance well board Servo motions could detected superimposed buzz since charging cur rent changed engine rpm pitch tone indicated engine speed Interference glitching due weak signals could also detected presence scratchy noise ominous sound wasnt heard during record flight polyhedral wing minimizes spiral instability basic model fuel shifting side wing other during uncoordinated turns generates quite load rudder work pilot So electrostatic stabilizer78910 used automatic wing leveling total weight system 1 oz equal hours worth fuel good trade Devices type can also used stabilize pitch attitude feature omitted instance Instead long tail large stabilizer used simple expedient provided substantial margin inher ent pitch stability precluded potential troubles related servo wear extra current drain active pitch stabilization loop Practice practice practice trials work air bugs out system com ponents installed model made relics left over 1960s record attempts flights during dusk dawn periods airplane cannot seen very well neither dark enough see small red green white navigation lights electrostatic stabilizer found big help during periods well during night visual determina tion attitude airplane based solely orientation three tiny candescent bulbs planned flight altitude about 1500 ft above ground 2000 ft above sea level array closely spaced color contrast strongly discernible staring star-like wanderers amongst Orion other rocks heavens hypnotic effect mesmerized keyed-up senses limit three four hours However FAI rule states no assistant pilots allowed use control transmitter electrostatic stabilizer served very effectively towards over coming roadblock Instead having pay attention compensate spiral instability able close eyes relax chaise lounge momentarily pulse control stick hard over response verbal commands observers could staring relays So cat skinned pretested equipment transferred new airframe July 4 baptismal flight mid-August assembly tortured 75 hours ground 25 hours air confidence machine very high remaining task flying 20 hours official witnesses would call some truly dedicated people Exciting boredom what John Worth called during previous 1964 record flight Care taken pick helpers officials qualities included patience stam ina sense humor Weather loomed last barrier model strong enough withstand fairly severe turbu lence avoid unpredictable thunderstorms keep pilots work acceptable level seemed wise wait calm characteristic equinoctial highs convectively stable masses hot air frequently stagnate area during last half September Synoptic weather information sources watched signs usually precede favorable conditions September 12 1 3 great crew officials off Bealeton VA running DCRCs annual Scale competition Wouldnt know year series rapidly-moving cold fronts followed September 20 crew gathered under drizzling clouds went through test run official weighing launching timing procedures next afternoon occluded front stretched east-west Kansas City Philadelphia rain 100 miles north field decided see far could get though 15-mph wind southeast partial overcast gray strato cumulus clouds Usually such conditions get worse before get better Rain high winds expected unless front changed its direction record flight launch went off planned 5 pm sundown 730 pm clouds cleared wind dead calm ground obviously flow 1500 ft model sat nearly stationary its airspeed matching wind must have near 20 mph southeast 830 pm observer method working well clear star-laden sky Two artificial satellites seen about time boredom relieved philosophical 142 Model Aviation I I Plasticote Propeller OR LARGE new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER LIGHTER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 discussions inspired sightings couple old Sputnik jokes came out woodwork too like Hey did hear Russians put 10 cows orbit say its herd shot round world midnight observers practiced giving yaw pitch trim commands competing see could hold new constellation stationary longest period long times could mistaken star got little sleepy missed few commands stir attention George Pickrell jumped up onto box bellowed Holy cats three guys coming over hill camels Theres nothing like healthy guffaw keep party alive About 2 am heavy ground fog formed stayed through night never grew thicker about 75 ft Sideways visibility 50 ft would have no way accom plish safe landing engine failed Vertically navigation lights stars could seen through cone-shaped hole 5 am wind aloft shifted west Hooray front moving away visibility cone however diminished about 200 included angle Ground equipment crew blankets soaked dew tension building because never flown through very foggy dawn six pairs eyes two pairs field glasses made 9 am thermal convection winds about 10 mph ground level causing model bounce nighttime observer procedure abandoned 1030 husky bumps causing excessive currents electrostatic stabilizer system aid shut down 1 pm 3V3 hours past prior record airplane performing admirably telemetry saying everthings fine grumpy over one-pilot rule otherwise felt OK landing 500 meters launch would scrub record claim decided wed done enough pushed engine shutdown button gust blew airplane onto collision couse wifes shiny new Honda during final approach interest continued harmony no choice except pull up over car model ignominously impaled corner pole cook tent 10 meters launch point home nonetheless valid claim record Inferred results implications gross takeoff weight model 498kg 1096 lbs 173kg 61 oz fuel model landed little half 089kg3 oz fuel still tank Thus model has theoretical capability flight excess 40 hours models gas mileage figure 1500 mpg its estimated FAI legal range wind nearly 1000 miles fuel consumption rate 42 gm/hr 15 oz/hr impressively low no miraculous engine efficiency involved performance As evidence consider following points model flown about 25 mph through flight probably has liftto-drag ratio about 10 speed Assuming propeller efficiency about 05 specific fuel consumption can calculated about 103 lb/hp-hr rae about 10 times smaller what goes nto two-cycle engines alcohol still nearly twice some larger four-cycle engines used manned air craft Further improvements engine therefore theoretically possible would easily achieved small size Continued page 146 Its incredible heres true Epoxy Paint thats Pre-mixed 000 can! 0@ RITES BLACK AARON PueIPrc42 pa Tnt No pot life ixing proof Lightweight r tough a Flexible C@/ERITE 420 BABYLON ROAD/HORSHAM PA 19044 Model Ii S th I10 5O1 4O IJ Local Dealer Send $1 00 Catalog Juiy 1982 143 System Hi-Starts 101 Ceeaplet Nt-Seen Kit Mie AeceenEly 14 Pound Pull tOO Feet Sleet Surgical Late Continuous Piece Section Reel Line Chute Stoke Tow Rings Hardware elig240o 102 Coenplcee 2-Mete Hi-Stan Kit 5 Pound Pill hO Feet 1 4 inch Slack Late Reel Line Chute Stake HardwCrC Etc $1700 103 Splaoetet Tobeg Opees Cl. Type tOO Feet Slack Surgical Late. 14 lb Pull $1800 104 Seplaoeerel Tebing 2-Megee S lb Poll S 500 10$ Nylee Hi-Stan UeeTwitted S 326 55 lb Test White ColorStaided g42S 106 Steedeed Pereehot Sd Celee Tow SinS5 325 105 Reel SiC Poe Hi-Stan Oteok Wied-UpLarge $ BOO CeterpletO Teogh Pleohe HdweeSmall 5 450 System II Winch 111 Pro-Lasech Coerteat WieOtt Mb ho Keen Edge State 01 art comelernlc ready-to-use less hatternI 12 oclt nonahie winch ncudecwheelc handle motor tuct twIn h reel ritnarcund oIl electrical wiring lice chute Hock-nc hatterc end ccii readn Ic fly S2$$00 112 Pre-tasech Wktch Preen. Seal Tureeroced includes drilled Iroere reel turnarnundS cairo $15000 107 Winch Cleat 18 led Ojeeseter 230 lb Teet Heauc DuIn Tow Sing Connecting Ring $825 105 Wiech Line 2000 Cl Scaided Nylee $3 lbTeet$1500 Choice ci Pill Test White Colot 1 tS lb Test $2000 Top Ouclito Acailable Soacral 153 lb Test $2600 Orders Othet Listed 180 lb Test $3200 System III Power Pod 110 Powee Pod desigeed Ed Ceontghtl Icr 2-mole sci Iclaces lihergiacs huill- ecira tank allowS tO mint- engine run fur use OdS metal lank engines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 P011 IN 47454 ELECTRONIC SERVICENTER FACTORY AUTHORIZED WARRANTY SERVICE FOR KRAFT over 35 other manufacturers Cleaning adjustment nsmitter receiver up 4 servos $2500 plus parts 24 HOUR SERVICE74 ZOUR SERVICE NEAL WARREN ~c13 South 21st Street Sp Philadelphia PA 19103 Tel 215 564-0800 Mon-Fri 9AM-53OPM Wed night till 8PM Sat 9AM Noon KIT S 9 Hi GLIDERS 3 SATELLITE KITS 17 OLD TIME GAS Send 25 for5 RUBBER 3 NORDICfine instruments 1980 catalog9 COMPETITION GASsmall craft & aircraft design FUEL DT TIMERS -$1075 eachOur comprehensive catalog return F Al Model SupplyBox 1534 Southold NY Ei P0 BOX 3957TORRANCE CA 90510inc 11971 516 765196Oar interesting Speculate what kind per formances might obtained all-out legal FAT model Suppose example spindly toothpicky monster model utmost structural efficiency made instead fairly robust Also assume use carbon fibers Kevlar titanium samarium cobalt magnets lith ium batteries solar cells tough microfilm coverings Further make tandem wing maximum allowable arear course install lightweight electrostatic pitch stabilizer allow equal loading both surfaces Work improving specific fuel consumption fly still slower speed long might fly Two hundred hours seems possible far Capa bility non-stop San Francisco Boston flight would reasonable expectation matter would New York Paris flight would some very difficult logistics problems associated such attempts have absolutely no interest trying prove can stay awake longer somebody elseso Itm inclined try something easier like tuming electrostatically- stabilized machines loose upper end Grand Canyon terrain avoidance features stabilizer would automatically steer machine down valley70 Wetd launch Moab UTr hop jet HooverDam sit inabartellingflyingstories waiting machine arrive day later Another dream another time Acknowledgements officials observers provided valuable help encouragement during record flight also during preparatory test flights am very grateful patience humor hard work contributed Mr Charles Calvert Contest Director Mr Wayne Simpsonr Mr Jack Anglin timers Mssrs Michael DeMuth George Pickrell Glen Scillian official observers pilOtrs assistants Helpful advice about lubrication problems obtained Mr Don Lindley Amoco Research Laboratories Mr Ray Cramer provided useful consultations aerodynamics Valuable technical assistance contributed members District Columbia Radio Control Club DCRC particular Mr Ben Givens worked telemetry devices Messrs Melvin Newcomer William Charbonneau Robert Lee assisted design fabri cation electrostatic stabilizer other electronic units Mr Paul Nash granted use runways gliderport Brookeville MD facility valuable asset project Mrs Lillian Goldfinger Johns Hopkins Uni versity Applied Physics LabAPL made useful suggestions patiently typed badly scribbled drafts Dr Gordon Dugger APL edited improved original manuscript effot greatly appreciated References I Hill ML. Beat RuSsians Bust Model Airplane News Vol 72 No Feb 1965 p 28 2 Hill ML. 27000 Feet Its Catbird Country Fisning Models #406 Jan 1971 p 18 3 Hill ML. Shuffle Off Buffalo Model Air plane News Vol 73 No 2 Feb 1966 p 30 4 Hill ML. II l Hours Exciting Boredom Firing Models #390 Sept 1969 p 6 5 Hill M L Tonoise World Speed Record Model Elsing Models *359 Jan 1967 p 20 6 Hill ML. Bong Boomer World Record Soaring Glider Fisring Models #360 Feb 1967 p 9 7 Hill ML. Introducing Electrostatic Autopilots Astronautics Aeronautics Vol 10 No 1 Nov 1972 pp 22-31 8 Hill ML. Electrostatic Autopilot RC MOdelsrr Flying Models #431 Feb 1973 p 20 9 Hill ML. Design Performance Electro statically Stabilized Delta Planform Mini RPVs Con ference Proceedings Milirarsr Electronics Defense Ex position Wiesbaden Germany Oct 977 Injeravia SA Geneva Switzerland pp 847-861 10 Hill ML. Whyte TR. Weiss RO. Rubio R Isquierdo M.Use Atmospheric Electric Fields Vertical Stabilization Terrain Avoidancerr Pro ceedings ofAJAA Guidance & Control Conf Albu querque NM. August 19-21 1981 ATAA Paper *81-I 848-CP AMA Building/Mankowski Continued page 45 New Chaiter Members AMA Builders plaques recognizing $500 contributions Ilsis lnonth Free Flight Model Airplanc Association Southern California Northern Virginia Radio Control Inc Detroit Aero Modeler RCr tner Robert Reder Walter Hartung Contributing Members Honor Roll listing donations $100 up now included Sooner Circle Burners Kennebec Valley Mod el Avialors Twin City Radio Controllers Inc l-lightmasters Klamath Falls Cincin nati Aero Modelers San Gabriel Valley RC League WINGSr Tidewater RC Club Ever green Radio Modelers Association Monmouth Model Airplane Club Skylarks Sharon McDonnell-Douglas RC Club Memphis Prop Rusters Niagra County RC Club Sacramento RC Club Reno Radio Control Club Greater Cincinnati RC Arvada Associated Modelers Goodyear Model Aircraft Club Niagara Sun day l1rers Inc Pomona Valley Model Air plane ClObr Riverside RC Club again Alfred Twyla Lchmberg Robert Krafft Carl Otto Margaret Walinski John Williams John Grigg Ed Louise 146 Model Aviation PRC LRUflCH SYSTEMS Rugged Simplicity Top Performance Reasonable Price Oreect 5alee/ Ida MiddleMen/Hi-5taetoAle KitFoemftd Minute Aasewblv 7 Coerplete looteuctruce Included No special 71010 Regoreed / Seod SANE Fun Funhen lirfeematron Ordee List peodoots Total / Add S200 Skipping gend Menen aede Cheeb CreditCord Notetbet end Eep Data/COO Add 5150/ Aleska Add 5350 / Hawaii Will COO Shipping Mail ot Phone I Wiech OtiterePegeteet Adneeco Will COO Phone Orders Waloerne / Mail Order Phone Orders nS/ Welcome
Edition: Model Aviation - 1982/07
Page Numbers: 78, 79, 80, 81, 133, 134, 135, 142, 143, 146
NO OCR TEXT Victory brings out smiles faces tired crew after 20-hr flight near Brookeville MD September 21-22 1 gai DCRC members worked hard during preparatory flights well official attempt Left right Mike DeMuth pilots assistant Jack Anglin Wayne Simpson timers Maynard Hill pilot George Pickrell Charlie Calvert CD Glen Scillian assistant CD Secrets success revealed test took literally years planning new FAI Dura tion World Record just over 20 hours powered RC models pilot estab lished last Septem ber lot problems solved keep model airthat long man set record describes prob lems trials errors eventual success unique flying machine planes may seem ugly facts boxes dont try move too fast Mother Nature puts some beautiful useful curves invisible air flowing near Inside boxes Well New Faithfuls internals also lessthan-elegant appearance Wires springs fuel tubes lacing cords shock-mounted para phernalia tangled end end scene included few splotches dried blood deposited evidence elbows propellers dont mix Any way look machine beautiful accurate adjective something admirable about way models guts frame muscles operated produce desired performance Twenty-five explosions per second shook machine like being hit tympanists mallet mezzo-forte Cranks turned valves slid bearings twirled gears whined sparks zapped springs twanged pushrods rocker arms beat tickety-tack rhythm against drone vibrating drum-tight skins cacaphony compounded whooshing propeller piccolo-like whistle air rushing tiny carburetor Indoors trillions electrons shoved alternator through maze diodes chips chokes connector plugs rainbow-colored harness wires move motors gears July 198279 Truss structures false ribs holey main ribs balsa box fuel tank visible shot Fuselage bottoms wing tips andstab covered wIth white opaque MonoKote remainder translucent orange scheme viewed best compromise visibility night during day Lights located teardrop-shaped lenses wing tip under stab Dark patches wing tips copper tape Staticmaster ionizers used part electrostatic wing leveller Flywheel magneto look like ugly bulges aerodynamic penalty small linkages Incandescent lights glowed wing tip atmospheric ions also being interrogated get reports bank angle happened comfortable womb laboratory out Mother Natures soggy foggy bumpy atmosphere very gratifing experience coax machine through two million thumps missed beat project hobby venture extraneous authors profession deals development remotely-piloted vehicles goal fly long time approach keep simple schedule whenever ready motivation fun Some aeromodeling techniques equipment employed may practical interest responsible developing long-duration drones unmanned vehicles UVs com munication relays decoys surveillance elec tronic countermeasures other uses idea model airplane technology might used reduce cost operational military systems very popular early 70s mixed reviews its merits have cropped up because some goals expectations went out bounds Perhaps article will bolster fundamentally sound idea would gratifying result However inside out side secrets New Faithful will exposed primarily help modelers also perhaps steer few fun breaking records Features New Faithful crate-like appear ance New Faithful consequence FAI rule limits Scale models gross takeoffweight 5 kg 1102 lb Aerobatic racing models seldom approach limit Duration models restriction means way increase fuel capacity decrease structural weight Engine displacement limited 10cc 061 cu lifting surface areawing tail restricted l5m sq 1615 sq ft neither rules influenced design wing sized fit inside Toyota Hatchback although largest per missible engine installed normally loafed 80 Model Aviation Left Charlie Calvert CD congratulates Maynard Hill Lots things have changed since similar picture made Frank Ehling Hill Old Faithful September1904 Planes look alike bellies larger important valuable changes have brought hobby AMA Only 18000 members got black-and-white pamphlet 1964 AMA close trouble now iargest sport aviation organization world Modified 05 FS6O used New Faithful mounted horizontally vibration dampening Reworked 05 10 throttle used Text explains lubrication wear problems magneto-flywheel spark ignition system Warningread text about flywheel shape Vibration testing done hanging model coat hangers foam pads elastic lines running ceiling back porch Hill FlyBy Night Aircraft Co Tail tied spring-loaded storm door door opening used approximate prop thrust Fuel frothing servowear other problems can detected method author recommends forchainsaw-powered models New Faithful wentthrough continuous 50-hour run prior its first test flight along 20% full power model size configuration could probably climb Out gross weight 11 lb loaded maximum fuel would have potential flight 200hr duration 6400-km 4000-mi range FAIs technical rules sensible promote safety provide common basis world-wide comparison generate some tough challenges rule permits pilot handle radio controls however would have repealed Duration records much beyond present made possible Editor FAIModel Committee ClAM has agreed provide pilot relief during such record attempts Subject approval overall FAI Sporting Com mittee will effective 1983 Development airplane matter putting some old principles together func tional way Reliability obtained fixing changing things failed during hours testing approach solving problems always seek simpler principle rather add complicated parts key functional components shown structural drawing engine modified 05 FS6O FS means four-stroke Fuel fed carburetor tank wing Fuel flow rate pressure steadied inter dicting float chamber Herein lies reason droop snoot Gravity dependable pumps modified bicycle alternator connected engine power takeoff through 21 step-up gear train Electric power alternator rectified dc filtered choked RF delivered aft under stabilizer RC receiver servos set small 100 mAh nickel-cadmium batteries located batteries provide safe landing case engine failure alternator powers control equipment three tiny lights needed wing tips tail night flying Also wing tips Staticmaster ionization units used electro static autopilot senses vector electric field exists atmosphere thereb4 Jrovides automatic leveling wings l telemetry transmitter hangs its dipole antenna station forward electrostatic stabilizer shown another vital unit Kraft transmitter flight tied automobile battery Thats put fuel tank spin prop life thing sustains itself least 20 hours airframe Balsa wood bridge-truss structures efficient easy build Streamlining boxes would add weight worth category competition Most airframe made ofcontest grade balsa coveringis Top Flites MonoKate fuselage outer wing panels stabilizer white opaque remainder translucent orange combination chosen best compromise daytime nighttime visibility bridge-truss spar wing front member protrudes way promotes early Onset turbulence boundary layer Usually airplane designers try keep boundary layers laminar over first half wing chord slow-flying models its easy induce laminar boundary layer persist too far flow can separate easily rear portion airfoil separation occursand probably will bumpy air en counteredthe result can drag force consid erably larger associated tripped turbulent boundary layer tends stay attached fuel tank does double duty center wing spar assembly 1/16 00 e 00 OCo tii~n 332 v0r 322 t8t5 23 212334 25 2357 5 10 1112150 O Propellor 16 dia tO pitch O Magneto & flywheel 05F560 engine modified @ 0S10 carbureto, modified Cam housing rea power take-off Filler made-from chemists filter paper O Float chamber Flearbie coupling rubber auto fuel hosel Two utep op gear train Fleoible coupling tygon tuhiegi Bicycle alternator @ Rectifier filter 6J Filters mesh iretal 3 200 mesh nylon er paper 062 Fuei tank sump also main center spar Telemetry transmitter j Incandescent bulbSO ma @SV red & greee lenses Stattcmaster 2y 500 ionizer Grounded guard strip copper tapel Auxiliary collector copper tapel @ Electrostatic autopilot Same 16 white lens @ Throttle serno Elevator rudder servos Kraft KP7F receiner @ Battery pack 1100 maHi NEW FAITHFUL cture componBnt layout sheets contest grade balsa coated internally epoxy resins impervious gasoline polyester resin covered externally fuel discussed later failures can result single layer fiberglass i/a oz/sq yd impreg- additions nitromethane propylene oxide ether nated same resin Most polyester Continued page 133 July 198281 Super Mini Boy Recommended Eigines Radios- Mufflers Helicopter tools stock Worlds stable easiest fly small 40 size R/O Helicopter Low maintenance mechanics engineer ed Dieter Schiuter Father RIO Helicopters Features fully collective Bell mixing main rotor head upright spinner starting straight shaft driven tail rotor & automatic compensation symmet rical prebuilt main rotor tail rotor blades autorotation clutch Uses standard 4 chanel radio Kits parts stock guarantee helicopters fly Ask man flies Move up Schiuter inSifrp U SEAN IflG subsidiary MINIATURE AIRCRAFT 2594 North Orange Blossom Trail ndo FL 32804 Phone 30514224531 test fuselages six flight fuselages high-altitude version Ranger V- 12 seriously delayed XP-77 use low-altitude engine its performance would inferior fighter airplane comparison existing models now production ac cording USAAF Technical Report #5359 Vidal Research took over job building wings made schedule slip Problems arose over matters basic time needed spread glue Completion first airplane delayed February 1944 Marcfr would make almost 1 years late wasnt until April Fools Day 1944 XP-77 flew Bells Niagra Falls NY factory Success last Far proto type arrived Wright Field May 2 soon revealed serious vibration 1700 rpm 2300 rpm probably due lack shock absorbers engine mounts June 6 1944 Allied troops storming Nor mandy beaches final assault Nazi-held Europe USAAF got around giving prototype XP-77 its serial number 43-34915 Official flight tests carried out Eglin Field FL second XP-77 43-34916 starting late July 1944 October 2 airplane fell out Immelmann turn inverted spin pilot recovered air plane went upright flat spin could recover forced jump pilot landed safely airplane demolished proved last straw project ended December 2 March 1945 war drawing close Army Air Forces completed report Flight Tests Bell XP-77 Airplane following has excerpted general handling characteristics XP-77 airplane satisfactory although restric tions evented dives spins violent maneuvers jectionable feature control system fixed trim tabs ailerons rudder results condition flight airplane will fly stick- rudder-free ground setting the. tabs Visibility good conditions flight ground handling Noise vibration cockpit considerable cockpit becomes very cold uncomfortable cold weather high altitude cockpit heat available high speed 328 mph obtained military power 3150 rpm 416 mani fold pressure 12600 ft critical altitude high speed 330 mph obtained war emergencypower 3300 rpm and57 at4000 ft critical altitude maximum rate climb obtained war emergency power 3630 feet per minute critical altitude 2000 ft ConclusionsThe overall performance XP-77 airplane inferior present fighter aircraft employed AAF results flight tests considerably lower estimated performance set Bell Aircraft Corp maximum speed airplane war emergency power considerably lower other AAF interceptor aircraft operating military power maximum rate climb military power very low interceptor air craft low service ceiling airplane renders useless against high altitude aircraft bad XP-77 fell 90 mph short its promised top speed rate climb no better 200-hp Pins Special aerobatic biplane service ceiling 30000 ft era P-38s would go 39000 ft P 51s would top 40000 ft interesting idea didnt work taught its creators lesson very very difficult build truly lightweight fighter plane General Dynamics learning lesson over again its F- 16 no longer lightweight Mach 2 ter course doesnt make sense give up such worthy goal As matter fact start Cassutt will close 250 mph 135-hp weighing little over 500 lb add couple machine guns some fuel radio two ours/Hill Continued page 80 other useful ingredients avoid building wing spar might dis solve its contents during flight samples balsa coated variety resins placed baby food jars containing candidate fuels array samples stored months backyard greenhouse exposure thermal cycling solvents brutal test Some combinations looked satisfactory dur ing winter turned messes July Sig Mfg Cos polyester finishing resin eventually chosen K&B finishing resin fared equally well test Scale modelers using chainsaw engines might find idea useful Its OK gasoline havent found resins will resist fuels containing nitromethane ether Engine modifications OS F560 engine received designed use glow plug ignition regular alcohol-based model fuel Gasoline far efficient alcohol glow plug ignition doesnt work well gasoline based fuels unless compression ratio increased point mechanical problems July 1982 133 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS 444444444* **4ATYOURFINoERTIPS4444MAYU* * Watch For**SHOWED ALLOY PARTS WITH* ***NO ORGANIZER AT OVER FIFTY* *Upcoming Ktsl**OOLLARS THAN TWICEOUR* *** 495* ****************44444444*444444* HSA735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST 2-56 3 16 SOCKET HEAD CAP SCREW 2-56 1 4 SOCKET HEAD CAP SCREW 3-56 I 2 SOCKET HEAD CAP SCREW 4-40 I 4 SOCKET HEAD CAP SCREW 4-40 1 2 SOCKET HEAD CAP SCREW 4-40 34 SOCKET HEAD CAP SCREW 4-40 1 SOCKET HEAD CAP SCREW 6-32 1 4 SOCKET HEAD CAP SCREW 6-32 I 2 SOCKET HEAD CAP SCREW 6-32 34 SOCKET HEAD CAP SCREW 6-32 1 SOCKET HEAD CAP SCREW 6-32 l SOCKET HEAD CAP SCREW 6-32 2 SOCKET HEAD CAP SCREW FLAT WASHERS SAE ZINC PLATED 2 4 iii~ PCS 25 25 25 20 20 20 20 IS 15 IS 15 15 15 75 50 75 90 TOTAL PCS 735 5 NYLON INSERT LOCK NUTS ZINC PLATED 2-56 4-40 6-32 * * * **** ********************* KITS COME COMPLETE WITH 18 COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER ONLY $2495 NEW THE POWRWIr%IC4ANDTHE RETRIEVER POW RWINCH perfect casanion * $27500 RErRThVER Both units use special plus shipping 4pole permanent magnet lc* current drain less battery 12 volt nortor design also inCnrpor ates lighteeight heavy duty welded arKi painted steel frane features adjustable nvtor sounting plate insure proper drive tension PCM R b mater unlimited ttnnaters WINaS has handle either ,u anythirsg between rid pro tected font switch operation ed towline druis a-sstruction required anti-kiting braking can readily disengaged e Manual drun brake retrieval takeup antrol 2000 feet braided nylon line tCs riixn ball-beering swivel bearing turnaround hub RETR EVER will eliminate losing turn frequency because long turnaround tines retrieving lines Line orossings due wind shifts using multiple winches will longer probl40n Best 11 have launch-a-minute capability Other features incltxle e Drag-free operation due flycasting imde Battery cables heavy duty clips feet braided nylon line ball bearing swivel Guide line aligrinent takeup nEsie nd prevent line tangling drive shaft WRITE FOR MORE I14FO1L&flON 4DAVEY $22500SYSTEMS plusmFinE CORPORATION shippingONE WOOD LANEMALVERNPA19355 * INTRODUCTORY PRICE 1982 134 Model Aviation severe Furthermore fuel-air mixtures become extremely critical Sensitive temperature humidity changes toyed enough Such ideas reach conclusion spark ignition its heavy coils radio interference problems bound better method So magneto coil flywheel grass trimmer engine Lawn Boy part #06823-07 -08 mounted front housing flywheel originally round cut dumbbell shape reduce weight Warning Dont try dodge engine turns up usual 9000 rpm dumb bell will fly apart prove have paint can hole waste basket large bulge sand annulus between containers Some sand flew out top flywheel broke Taking fatigue account wouldnt trust thing above 5000 rpm Top speed engine 16 x 10 hand-carved propeller around 4500 rpm coil called solid-state magneto spark discharge triggered same magnetic flux energizes coil inner secrets device seem proprietary two important observations can made knowing exactly works 1 no points wear Out 2 generates milder form radio-frequency noise either point systems capacitance discharge systems RF noise can effectively suppressed putting 10K resistor series plug putting shield over high-tension lead Until about 1979 engines being massproduced hobby use two-stroke type until flight 1981 World Records Power categories estab lished such engines Although experi mented earlier homemade four-stroke engines have better fuel efficiency perfecting engine Duration takes lots spare parts no serious effort made use such design until OS FS6O appeared engine remarkably well built have run 400 hours bearings piston fit compression practically good new Some problems however showed up valve/rocker-arm/cam system partly because very little lubricant being used effort attain high fuel efficiency Valve clearances reset three hours after 24 hours pushrods too short permit further adjustment problem partially fixed weakening shortening valve springs replacing pushrods pieces Allen hexwrench material 5/64 across flats tips pushrods tips cam follower pins hardened heating microtorch about 16000F near orange glow quenchingwith water No annealing tempering done after quench Next valve-drive cam started wear problem mitigated adding oil fuel drilling small breather hole crank case aft cam Oil thereby blown through cam housing splattering oil made new black mess inside models nose now valve system good 50 hours between adjustments next problem Carbon build-up valves spark plug choked engine stop about 10 hours unless baby-sat gradually backed out needle valve reached old bag tricks polyisobutylene chemical used manufacture synthetic rubber viscous liquid does pretty good job lubricating metals instead producing carbon particles cracks mostly combustible hydrocarbon molecules heated Presto Very little carbon formed fuel efficiency increased composition fuel 93% premium grade Mail YOUr Order To* Please Include $250 postage HARDWARE SYSTEMS handling 42a WushingRon Ave S.* Add $150 COD Eden Prairie Mm. 55344* Minn realdenta add 5% sales tax * Orders will shipped within 48 Phone *129418757hours INDIAN CITY RADIO CONTROL CLUB Presents DETROIT EXPO IV Greater Michigan Modelers Show PLANES BOATS 0 CARS MANUFACTURERS STATIC DISPLAYS0 SWAP-SHOP October 123 1982 Eight Mile Artillery Armory Oak Park Michigan Info 6909 Monroe Blvd Taylor MI 48180 U U U I I I like world-taits actual-Sullivan Insta-Just Plstk Conoar Starter. ine Handles feel good tn serve Hook hand can adjus*t quick Dattery itll 38$ IJ-2 especially suiia$e inftaine Incredible ill fit sizes Grab hold starter can shake huNts 5suppliesup ds enginesand unleaded gasoline 7% polyisobutylene tedious work dealt carbure tor standard RC-type needle valve could have installed would have defied simpli city rule Besides hearing poor US FS6O very quiet engine Instead built-in means keeping fuel-air ratio constant throughout power range sought car buretor 15cc OS 10 engine adapted inlet manifold mercury ma nometer attached monitor inlet-manifold pressure fuel fed engine via float chamber 50cc graduated burette needle valve first adjusted lean smooth running full throttle periodic readings rpm manifold pressure fuel level burette number proportional fuel-air ratio calculated Additional sets data recorded lower throttle settings fuel-air ratio never came out constant stock carburetor Usually mixture became very rith low power peculiarly-shaped notch carburetor barrel needed notch shape found grinding little testing fuel-air ratio over whole rpm range grinding little testing again etc etc got right third carburetor fifth weekend during long procedure got absent-minded forgot propeller revving front Ouch Shake shake shake Eventually continuous hands-oft run 50 hours duration made run engine mounted aircraft suspended elastic lines allow entire flight-ready assembly vibrate airborne often hears builder new airplane exclaim flew right off drawing board effusion signifies bad consisted Kraft 533 FM receiver Ace Bantam Midget servos placed far aft reduce chances ignition noise would Continued page 142 July 1982 135 IL GRAB HOLD ly iii th Sri I I I I I I I I I I practice really ought hang up new model shake about 15 minutes per pound before trying fly Controls fuselage radio equipment V -NW yone Sec after 100 pm September 22 touchdown Open apace available landing model chose sit down cook tent PAl rules require landing within 500 meters launch point spot within 10 meters although embarrassing acceptable No damage iota fuel left tank wuniversai type ror encauseg cowls Thrse tail tubes suit engine position Seiect tail pipe remove others desired 0 Small Compact easy attach Tsil pipe extension Included AII mounting hardware clamps screws included THREE SIZES EM-I -19 . 1195 EM-2 -40.. 1295 EM-345.80. 1430 leading dealers available ORDER DIRECT Add 10% postage handling Calif residents add 6% tsi Check Cod accepted_Supply card number date ViSi_or MASTER CARD manifold fit scale model cowls TWo exhaust tubes allow maximum sxhaust removal less heating PITTS STYLE MUFFLERS OFor scale aircraft such PiflS CESSNA 150 Angied exhaust tubee exit bottom cowling OWorm drive mounting strap OTait pipe extensions -. mounting hardwan -1 cause jitter excessive current drain servos As turned out precaution really necessary because very effective shielding eventually installed nickel-cadmium batteries special Hi-Rate type obtained Ace Radio Control can withstand severe over charging no need voltage regulator telemetering unit sensed current flowing out batteries monotonous musical note ground-based receiver gave pleasant assurance well board Servo motions could detected superimposed buzz since charging cur rent changed engine rpm pitch tone indicated engine speed Interference glitching due weak signals could also detected presence scratchy noise ominous sound wasnt heard during record flight polyhedral wing minimizes spiral instability basic model fuel shifting side wing other during uncoordinated turns generates quite load rudder work pilot So electrostatic stabilizer78910 used automatic wing leveling total weight system 1 oz equal hours worth fuel good trade Devices type can also used stabilize pitch attitude feature omitted instance Instead long tail large stabilizer used simple expedient provided substantial margin inher ent pitch stability precluded potential troubles related servo wear extra current drain active pitch stabilization loop Practice practice practice trials work air bugs out system com ponents installed model made relics left over 1960s record attempts flights during dusk dawn periods airplane cannot seen very well neither dark enough see small red green white navigation lights electrostatic stabilizer found big help during periods well during night visual determina tion attitude airplane based solely orientation three tiny candescent bulbs planned flight altitude about 1500 ft above ground 2000 ft above sea level array closely spaced color contrast strongly discernible staring star-like wanderers amongst Orion other rocks heavens hypnotic effect mesmerized keyed-up senses limit three four hours However FAI rule states no assistant pilots allowed use control transmitter electrostatic stabilizer served very effectively towards over coming roadblock Instead having pay attention compensate spiral instability able close eyes relax chaise lounge momentarily pulse control stick hard over response verbal commands observers could staring relays So cat skinned pretested equipment transferred new airframe July 4 baptismal flight mid-August assembly tortured 75 hours ground 25 hours air confidence machine very high remaining task flying 20 hours official witnesses would call some truly dedicated people Exciting boredom what John Worth called during previous 1964 record flight Care taken pick helpers officials qualities included patience stam ina sense humor Weather loomed last barrier model strong enough withstand fairly severe turbu lence avoid unpredictable thunderstorms keep pilots work acceptable level seemed wise wait calm characteristic equinoctial highs convectively stable masses hot air frequently stagnate area during last half September Synoptic weather information sources watched signs usually precede favorable conditions September 12 1 3 great crew officials off Bealeton VA running DCRCs annual Scale competition Wouldnt know year series rapidly-moving cold fronts followed September 20 crew gathered under drizzling clouds went through test run official weighing launching timing procedures next afternoon occluded front stretched east-west Kansas City Philadelphia rain 100 miles north field decided see far could get though 15-mph wind southeast partial overcast gray strato cumulus clouds Usually such conditions get worse before get better Rain high winds expected unless front changed its direction record flight launch went off planned 5 pm sundown 730 pm clouds cleared wind dead calm ground obviously flow 1500 ft model sat nearly stationary its airspeed matching wind must have near 20 mph southeast 830 pm observer method working well clear star-laden sky Two artificial satellites seen about time boredom relieved philosophical 142 Model Aviation I I Plasticote Propeller OR LARGE new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER LIGHTER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 discussions inspired sightings couple old Sputnik jokes came out woodwork too like Hey did hear Russians put 10 cows orbit say its herd shot round world midnight observers practiced giving yaw pitch trim commands competing see could hold new constellation stationary longest period long times could mistaken star got little sleepy missed few commands stir attention George Pickrell jumped up onto box bellowed Holy cats three guys coming over hill camels Theres nothing like healthy guffaw keep party alive About 2 am heavy ground fog formed stayed through night never grew thicker about 75 ft Sideways visibility 50 ft would have no way accom plish safe landing engine failed Vertically navigation lights stars could seen through cone-shaped hole 5 am wind aloft shifted west Hooray front moving away visibility cone however diminished about 200 included angle Ground equipment crew blankets soaked dew tension building because never flown through very foggy dawn six pairs eyes two pairs field glasses made 9 am thermal convection winds about 10 mph ground level causing model bounce nighttime observer procedure abandoned 1030 husky bumps causing excessive currents electrostatic stabilizer system aid shut down 1 pm 3V3 hours past prior record airplane performing admirably telemetry saying everthings fine grumpy over one-pilot rule otherwise felt OK landing 500 meters launch would scrub record claim decided wed done enough pushed engine shutdown button gust blew airplane onto collision couse wifes shiny new Honda during final approach interest continued harmony no choice except pull up over car model ignominously impaled corner pole cook tent 10 meters launch point home nonetheless valid claim record Inferred results implications gross takeoff weight model 498kg 1096 lbs 173kg 61 oz fuel model landed little half 089kg3 oz fuel still tank Thus model has theoretical capability flight excess 40 hours models gas mileage figure 1500 mpg its estimated FAI legal range wind nearly 1000 miles fuel consumption rate 42 gm/hr 15 oz/hr impressively low no miraculous engine efficiency involved performance As evidence consider following points model flown about 25 mph through flight probably has liftto-drag ratio about 10 speed Assuming propeller efficiency about 05 specific fuel consumption can calculated about 103 lb/hp-hr rae about 10 times smaller what goes nto two-cycle engines alcohol still nearly twice some larger four-cycle engines used manned air craft Further improvements engine therefore theoretically possible would easily achieved small size Continued page 146 Its incredible heres true Epoxy Paint thats Pre-mixed 000 can! 0@ RITES BLACK AARON PueIPrc42 pa Tnt No pot life ixing proof Lightweight r tough a Flexible C@/ERITE 420 BABYLON ROAD/HORSHAM PA 19044 Model Ii S th I10 5O1 4O IJ Local Dealer Send $1 00 Catalog Juiy 1982 143 System Hi-Starts 101 Ceeaplet Nt-Seen Kit Mie AeceenEly 14 Pound Pull tOO Feet Sleet Surgical Late Continuous Piece Section Reel Line Chute Stoke Tow Rings Hardware elig240o 102 Coenplcee 2-Mete Hi-Stan Kit 5 Pound Pill hO Feet 1 4 inch Slack Late Reel Line Chute Stake HardwCrC Etc $1700 103 Splaoetet Tobeg Opees Cl. Type tOO Feet Slack Surgical Late. 14 lb Pull $1800 104 Seplaoeerel Tebing 2-Megee S lb Poll S 500 10$ Nylee Hi-Stan UeeTwitted S 326 55 lb Test White ColorStaided g42S 106 Steedeed Pereehot Sd Celee Tow SinS5 325 105 Reel SiC Poe Hi-Stan Oteok Wied-UpLarge $ BOO CeterpletO Teogh Pleohe HdweeSmall 5 450 System II Winch 111 Pro-Lasech Coerteat WieOtt Mb ho Keen Edge State 01 art comelernlc ready-to-use less hatternI 12 oclt nonahie winch ncudecwheelc handle motor tuct twIn h reel ritnarcund oIl electrical wiring lice chute Hock-nc hatterc end ccii readn Ic fly S2$$00 112 Pre-tasech Wktch Preen. Seal Tureeroced includes drilled Iroere reel turnarnundS cairo $15000 107 Winch Cleat 18 led Ojeeseter 230 lb Teet Heauc DuIn Tow Sing Connecting Ring $825 105 Wiech Line 2000 Cl Scaided Nylee $3 lbTeet$1500 Choice ci Pill Test White Colot 1 tS lb Test $2000 Top Ouclito Acailable Soacral 153 lb Test $2600 Orders Othet Listed 180 lb Test $3200 System III Power Pod 110 Powee Pod desigeed Ed Ceontghtl Icr 2-mole sci Iclaces lihergiacs huill- ecira tank allowS tO mint- engine run fur use OdS metal lank engines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 P011 IN 47454 ELECTRONIC SERVICENTER FACTORY AUTHORIZED WARRANTY SERVICE FOR KRAFT over 35 other manufacturers Cleaning adjustment nsmitter receiver up 4 servos $2500 plus parts 24 HOUR SERVICE74 ZOUR SERVICE NEAL WARREN ~c13 South 21st Street Sp Philadelphia PA 19103 Tel 215 564-0800 Mon-Fri 9AM-53OPM Wed night till 8PM Sat 9AM Noon KIT S 9 Hi GLIDERS 3 SATELLITE KITS 17 OLD TIME GAS Send 25 for5 RUBBER 3 NORDICfine instruments 1980 catalog9 COMPETITION GASsmall craft & aircraft design FUEL DT TIMERS -$1075 eachOur comprehensive catalog return F Al Model SupplyBox 1534 Southold NY Ei P0 BOX 3957TORRANCE CA 90510inc 11971 516 765196Oar interesting Speculate what kind per formances might obtained all-out legal FAT model Suppose example spindly toothpicky monster model utmost structural efficiency made instead fairly robust Also assume use carbon fibers Kevlar titanium samarium cobalt magnets lith ium batteries solar cells tough microfilm coverings Further make tandem wing maximum allowable arear course install lightweight electrostatic pitch stabilizer allow equal loading both surfaces Work improving specific fuel consumption fly still slower speed long might fly Two hundred hours seems possible far Capa bility non-stop San Francisco Boston flight would reasonable expectation matter would New York Paris flight would some very difficult logistics problems associated such attempts have absolutely no interest trying prove can stay awake longer somebody elseso Itm inclined try something easier like tuming electrostatically- stabilized machines loose upper end Grand Canyon terrain avoidance features stabilizer would automatically steer machine down valley70 Wetd launch Moab UTr hop jet HooverDam sit inabartellingflyingstories waiting machine arrive day later Another dream another time Acknowledgements officials observers provided valuable help encouragement during record flight also during preparatory test flights am very grateful patience humor hard work contributed Mr Charles Calvert Contest Director Mr Wayne Simpsonr Mr Jack Anglin timers Mssrs Michael DeMuth George Pickrell Glen Scillian official observers pilOtrs assistants Helpful advice about lubrication problems obtained Mr Don Lindley Amoco Research Laboratories Mr Ray Cramer provided useful consultations aerodynamics Valuable technical assistance contributed members District Columbia Radio Control Club DCRC particular Mr Ben Givens worked telemetry devices Messrs Melvin Newcomer William Charbonneau Robert Lee assisted design fabri cation electrostatic stabilizer other electronic units Mr Paul Nash granted use runways gliderport Brookeville MD facility valuable asset project Mrs Lillian Goldfinger Johns Hopkins Uni versity Applied Physics LabAPL made useful suggestions patiently typed badly scribbled drafts Dr Gordon Dugger APL edited improved original manuscript effot greatly appreciated References I Hill ML. Beat RuSsians Bust Model Airplane News Vol 72 No Feb 1965 p 28 2 Hill ML. 27000 Feet Its Catbird Country Fisning Models #406 Jan 1971 p 18 3 Hill ML. Shuffle Off Buffalo Model Air plane News Vol 73 No 2 Feb 1966 p 30 4 Hill ML. II l Hours Exciting Boredom Firing Models #390 Sept 1969 p 6 5 Hill M L Tonoise World Speed Record Model Elsing Models *359 Jan 1967 p 20 6 Hill ML. Bong Boomer World Record Soaring Glider Fisring Models #360 Feb 1967 p 9 7 Hill ML. Introducing Electrostatic Autopilots Astronautics Aeronautics Vol 10 No 1 Nov 1972 pp 22-31 8 Hill ML. Electrostatic Autopilot RC MOdelsrr Flying Models #431 Feb 1973 p 20 9 Hill ML. Design Performance Electro statically Stabilized Delta Planform Mini RPVs Con ference Proceedings Milirarsr Electronics Defense Ex position Wiesbaden Germany Oct 977 Injeravia SA Geneva Switzerland pp 847-861 10 Hill ML. Whyte TR. Weiss RO. Rubio R Isquierdo M.Use Atmospheric Electric Fields Vertical Stabilization Terrain Avoidancerr Pro ceedings ofAJAA Guidance & Control Conf Albu querque NM. August 19-21 1981 ATAA Paper *81-I 848-CP AMA Building/Mankowski Continued page 45 New Chaiter Members AMA Builders plaques recognizing $500 contributions Ilsis lnonth Free Flight Model Airplanc Association Southern California Northern Virginia Radio Control Inc Detroit Aero Modeler RCr tner Robert Reder Walter Hartung Contributing Members Honor Roll listing donations $100 up now included Sooner Circle Burners Kennebec Valley Mod el Avialors Twin City Radio Controllers Inc l-lightmasters Klamath Falls Cincin nati Aero Modelers San Gabriel Valley RC League WINGSr Tidewater RC Club Ever green Radio Modelers Association Monmouth Model Airplane Club Skylarks Sharon McDonnell-Douglas RC Club Memphis Prop Rusters Niagra County RC Club Sacramento RC Club Reno Radio Control Club Greater Cincinnati RC Arvada Associated Modelers Goodyear Model Aircraft Club Niagara Sun day l1rers Inc Pomona Valley Model Air plane ClObr Riverside RC Club again Alfred Twyla Lchmberg Robert Krafft Carl Otto Margaret Walinski John Williams John Grigg Ed Louise 146 Model Aviation PRC LRUflCH SYSTEMS Rugged Simplicity Top Performance Reasonable Price Oreect 5alee/ Ida MiddleMen/Hi-5taetoAle KitFoemftd Minute Aasewblv 7 Coerplete looteuctruce Included No special 71010 Regoreed / Seod SANE Fun Funhen lirfeematron Ordee List peodoots Total / Add S200 Skipping gend Menen aede Cheeb CreditCord Notetbet end Eep Data/COO Add 5150/ Aleska Add 5350 / Hawaii Will COO Shipping Mail ot Phone I Wiech OtiterePegeteet Adneeco Will COO Phone Orders Waloerne / Mail Order Phone Orders nS/ Welcome
Edition: Model Aviation - 1982/07
Page Numbers: 78, 79, 80, 81, 133, 134, 135, 142, 143, 146
NO OCR TEXT Victory brings out smiles faces tired crew after 20-hr flight near Brookeville MD September 21-22 1 gai DCRC members worked hard during preparatory flights well official attempt Left right Mike DeMuth pilots assistant Jack Anglin Wayne Simpson timers Maynard Hill pilot George Pickrell Charlie Calvert CD Glen Scillian assistant CD Secrets success revealed test took literally years planning new FAI Dura tion World Record just over 20 hours powered RC models pilot estab lished last Septem ber lot problems solved keep model airthat long man set record describes prob lems trials errors eventual success unique flying machine planes may seem ugly facts boxes dont try move too fast Mother Nature puts some beautiful useful curves invisible air flowing near Inside boxes Well New Faithfuls internals also lessthan-elegant appearance Wires springs fuel tubes lacing cords shock-mounted para phernalia tangled end end scene included few splotches dried blood deposited evidence elbows propellers dont mix Any way look machine beautiful accurate adjective something admirable about way models guts frame muscles operated produce desired performance Twenty-five explosions per second shook machine like being hit tympanists mallet mezzo-forte Cranks turned valves slid bearings twirled gears whined sparks zapped springs twanged pushrods rocker arms beat tickety-tack rhythm against drone vibrating drum-tight skins cacaphony compounded whooshing propeller piccolo-like whistle air rushing tiny carburetor Indoors trillions electrons shoved alternator through maze diodes chips chokes connector plugs rainbow-colored harness wires move motors gears July 198279 Truss structures false ribs holey main ribs balsa box fuel tank visible shot Fuselage bottoms wing tips andstab covered wIth white opaque MonoKote remainder translucent orange scheme viewed best compromise visibility night during day Lights located teardrop-shaped lenses wing tip under stab Dark patches wing tips copper tape Staticmaster ionizers used part electrostatic wing leveller Flywheel magneto look like ugly bulges aerodynamic penalty small linkages Incandescent lights glowed wing tip atmospheric ions also being interrogated get reports bank angle happened comfortable womb laboratory out Mother Natures soggy foggy bumpy atmosphere very gratifing experience coax machine through two million thumps missed beat project hobby venture extraneous authors profession deals development remotely-piloted vehicles goal fly long time approach keep simple schedule whenever ready motivation fun Some aeromodeling techniques equipment employed may practical interest responsible developing long-duration drones unmanned vehicles UVs com munication relays decoys surveillance elec tronic countermeasures other uses idea model airplane technology might used reduce cost operational military systems very popular early 70s mixed reviews its merits have cropped up because some goals expectations went out bounds Perhaps article will bolster fundamentally sound idea would gratifying result However inside out side secrets New Faithful will exposed primarily help modelers also perhaps steer few fun breaking records Features New Faithful crate-like appear ance New Faithful consequence FAI rule limits Scale models gross takeoffweight 5 kg 1102 lb Aerobatic racing models seldom approach limit Duration models restriction means way increase fuel capacity decrease structural weight Engine displacement limited 10cc 061 cu lifting surface areawing tail restricted l5m sq 1615 sq ft neither rules influenced design wing sized fit inside Toyota Hatchback although largest per missible engine installed normally loafed 80 Model Aviation Left Charlie Calvert CD congratulates Maynard Hill Lots things have changed since similar picture made Frank Ehling Hill Old Faithful September1904 Planes look alike bellies larger important valuable changes have brought hobby AMA Only 18000 members got black-and-white pamphlet 1964 AMA close trouble now iargest sport aviation organization world Modified 05 FS6O used New Faithful mounted horizontally vibration dampening Reworked 05 10 throttle used Text explains lubrication wear problems magneto-flywheel spark ignition system Warningread text about flywheel shape Vibration testing done hanging model coat hangers foam pads elastic lines running ceiling back porch Hill FlyBy Night Aircraft Co Tail tied spring-loaded storm door door opening used approximate prop thrust Fuel frothing servowear other problems can detected method author recommends forchainsaw-powered models New Faithful wentthrough continuous 50-hour run prior its first test flight along 20% full power model size configuration could probably climb Out gross weight 11 lb loaded maximum fuel would have potential flight 200hr duration 6400-km 4000-mi range FAIs technical rules sensible promote safety provide common basis world-wide comparison generate some tough challenges rule permits pilot handle radio controls however would have repealed Duration records much beyond present made possible Editor FAIModel Committee ClAM has agreed provide pilot relief during such record attempts Subject approval overall FAI Sporting Com mittee will effective 1983 Development airplane matter putting some old principles together func tional way Reliability obtained fixing changing things failed during hours testing approach solving problems always seek simpler principle rather add complicated parts key functional components shown structural drawing engine modified 05 FS6O FS means four-stroke Fuel fed carburetor tank wing Fuel flow rate pressure steadied inter dicting float chamber Herein lies reason droop snoot Gravity dependable pumps modified bicycle alternator connected engine power takeoff through 21 step-up gear train Electric power alternator rectified dc filtered choked RF delivered aft under stabilizer RC receiver servos set small 100 mAh nickel-cadmium batteries located batteries provide safe landing case engine failure alternator powers control equipment three tiny lights needed wing tips tail night flying Also wing tips Staticmaster ionization units used electro static autopilot senses vector electric field exists atmosphere thereb4 Jrovides automatic leveling wings l telemetry transmitter hangs its dipole antenna station forward electrostatic stabilizer shown another vital unit Kraft transmitter flight tied automobile battery Thats put fuel tank spin prop life thing sustains itself least 20 hours airframe Balsa wood bridge-truss structures efficient easy build Streamlining boxes would add weight worth category competition Most airframe made ofcontest grade balsa coveringis Top Flites MonoKate fuselage outer wing panels stabilizer white opaque remainder translucent orange combination chosen best compromise daytime nighttime visibility bridge-truss spar wing front member protrudes way promotes early Onset turbulence boundary layer Usually airplane designers try keep boundary layers laminar over first half wing chord slow-flying models its easy induce laminar boundary layer persist too far flow can separate easily rear portion airfoil separation occursand probably will bumpy air en counteredthe result can drag force consid erably larger associated tripped turbulent boundary layer tends stay attached fuel tank does double duty center wing spar assembly 1/16 00 e 00 OCo tii~n 332 v0r 322 t8t5 23 212334 25 2357 5 10 1112150 O Propellor 16 dia tO pitch O Magneto & flywheel 05F560 engine modified @ 0S10 carbureto, modified Cam housing rea power take-off Filler made-from chemists filter paper O Float chamber Flearbie coupling rubber auto fuel hosel Two utep op gear train Fleoible coupling tygon tuhiegi Bicycle alternator @ Rectifier filter 6J Filters mesh iretal 3 200 mesh nylon er paper 062 Fuei tank sump also main center spar Telemetry transmitter j Incandescent bulbSO ma @SV red & greee lenses Stattcmaster 2y 500 ionizer Grounded guard strip copper tapel Auxiliary collector copper tapel @ Electrostatic autopilot Same 16 white lens @ Throttle serno Elevator rudder servos Kraft KP7F receiner @ Battery pack 1100 maHi NEW FAITHFUL cture componBnt layout sheets contest grade balsa coated internally epoxy resins impervious gasoline polyester resin covered externally fuel discussed later failures can result single layer fiberglass i/a oz/sq yd impreg- additions nitromethane propylene oxide ether nated same resin Most polyester Continued page 133 July 198281 Super Mini Boy Recommended Eigines Radios- Mufflers Helicopter tools stock Worlds stable easiest fly small 40 size R/O Helicopter Low maintenance mechanics engineer ed Dieter Schiuter Father RIO Helicopters Features fully collective Bell mixing main rotor head upright spinner starting straight shaft driven tail rotor & automatic compensation symmet rical prebuilt main rotor tail rotor blades autorotation clutch Uses standard 4 chanel radio Kits parts stock guarantee helicopters fly Ask man flies Move up Schiuter inSifrp U SEAN IflG subsidiary MINIATURE AIRCRAFT 2594 North Orange Blossom Trail ndo FL 32804 Phone 30514224531 test fuselages six flight fuselages high-altitude version Ranger V- 12 seriously delayed XP-77 use low-altitude engine its performance would inferior fighter airplane comparison existing models now production ac cording USAAF Technical Report #5359 Vidal Research took over job building wings made schedule slip Problems arose over matters basic time needed spread glue Completion first airplane delayed February 1944 Marcfr would make almost 1 years late wasnt until April Fools Day 1944 XP-77 flew Bells Niagra Falls NY factory Success last Far proto type arrived Wright Field May 2 soon revealed serious vibration 1700 rpm 2300 rpm probably due lack shock absorbers engine mounts June 6 1944 Allied troops storming Nor mandy beaches final assault Nazi-held Europe USAAF got around giving prototype XP-77 its serial number 43-34915 Official flight tests carried out Eglin Field FL second XP-77 43-34916 starting late July 1944 October 2 airplane fell out Immelmann turn inverted spin pilot recovered air plane went upright flat spin could recover forced jump pilot landed safely airplane demolished proved last straw project ended December 2 March 1945 war drawing close Army Air Forces completed report Flight Tests Bell XP-77 Airplane following has excerpted general handling characteristics XP-77 airplane satisfactory although restric tions evented dives spins violent maneuvers jectionable feature control system fixed trim tabs ailerons rudder results condition flight airplane will fly stick- rudder-free ground setting the. tabs Visibility good conditions flight ground handling Noise vibration cockpit considerable cockpit becomes very cold uncomfortable cold weather high altitude cockpit heat available high speed 328 mph obtained military power 3150 rpm 416 mani fold pressure 12600 ft critical altitude high speed 330 mph obtained war emergencypower 3300 rpm and57 at4000 ft critical altitude maximum rate climb obtained war emergency power 3630 feet per minute critical altitude 2000 ft ConclusionsThe overall performance XP-77 airplane inferior present fighter aircraft employed AAF results flight tests considerably lower estimated performance set Bell Aircraft Corp maximum speed airplane war emergency power considerably lower other AAF interceptor aircraft operating military power maximum rate climb military power very low interceptor air craft low service ceiling airplane renders useless against high altitude aircraft bad XP-77 fell 90 mph short its promised top speed rate climb no better 200-hp Pins Special aerobatic biplane service ceiling 30000 ft era P-38s would go 39000 ft P 51s would top 40000 ft interesting idea didnt work taught its creators lesson very very difficult build truly lightweight fighter plane General Dynamics learning lesson over again its F- 16 no longer lightweight Mach 2 ter course doesnt make sense give up such worthy goal As matter fact start Cassutt will close 250 mph 135-hp weighing little over 500 lb add couple machine guns some fuel radio two ours/Hill Continued page 80 other useful ingredients avoid building wing spar might dis solve its contents during flight samples balsa coated variety resins placed baby food jars containing candidate fuels array samples stored months backyard greenhouse exposure thermal cycling solvents brutal test Some combinations looked satisfactory dur ing winter turned messes July Sig Mfg Cos polyester finishing resin eventually chosen K&B finishing resin fared equally well test Scale modelers using chainsaw engines might find idea useful Its OK gasoline havent found resins will resist fuels containing nitromethane ether Engine modifications OS F560 engine received designed use glow plug ignition regular alcohol-based model fuel Gasoline far efficient alcohol glow plug ignition doesnt work well gasoline based fuels unless compression ratio increased point mechanical problems July 1982 133 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS 444444444* **4ATYOURFINoERTIPS4444MAYU* * Watch For**SHOWED ALLOY PARTS WITH* ***NO ORGANIZER AT OVER FIFTY* *Upcoming Ktsl**OOLLARS THAN TWICEOUR* *** 495* ****************44444444*444444* HSA735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST 2-56 3 16 SOCKET HEAD CAP SCREW 2-56 1 4 SOCKET HEAD CAP SCREW 3-56 I 2 SOCKET HEAD CAP SCREW 4-40 I 4 SOCKET HEAD CAP SCREW 4-40 1 2 SOCKET HEAD CAP SCREW 4-40 34 SOCKET HEAD CAP SCREW 4-40 1 SOCKET HEAD CAP SCREW 6-32 1 4 SOCKET HEAD CAP SCREW 6-32 I 2 SOCKET HEAD CAP SCREW 6-32 34 SOCKET HEAD CAP SCREW 6-32 1 SOCKET HEAD CAP SCREW 6-32 l SOCKET HEAD CAP SCREW 6-32 2 SOCKET HEAD CAP SCREW FLAT WASHERS SAE ZINC PLATED 2 4 iii~ PCS 25 25 25 20 20 20 20 IS 15 IS 15 15 15 75 50 75 90 TOTAL PCS 735 5 NYLON INSERT LOCK NUTS ZINC PLATED 2-56 4-40 6-32 * * * **** ********************* KITS COME COMPLETE WITH 18 COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER ONLY $2495 NEW THE POWRWIr%IC4ANDTHE RETRIEVER POW RWINCH perfect casanion * $27500 RErRThVER Both units use special plus shipping 4pole permanent magnet lc* current drain less battery 12 volt nortor design also inCnrpor ates lighteeight heavy duty welded arKi painted steel frane features adjustable nvtor sounting plate insure proper drive tension PCM R b mater unlimited ttnnaters WINaS has handle either ,u anythirsg between rid pro tected font switch operation ed towline druis a-sstruction required anti-kiting braking can readily disengaged e Manual drun brake retrieval takeup antrol 2000 feet braided nylon line tCs riixn ball-beering swivel bearing turnaround hub RETR EVER will eliminate losing turn frequency because long turnaround tines retrieving lines Line orossings due wind shifts using multiple winches will longer probl40n Best 11 have launch-a-minute capability Other features incltxle e Drag-free operation due flycasting imde Battery cables heavy duty clips feet braided nylon line ball bearing swivel Guide line aligrinent takeup nEsie nd prevent line tangling drive shaft WRITE FOR MORE I14FO1L&flON 4DAVEY $22500SYSTEMS plusmFinE CORPORATION shippingONE WOOD LANEMALVERNPA19355 * INTRODUCTORY PRICE 1982 134 Model Aviation severe Furthermore fuel-air mixtures become extremely critical Sensitive temperature humidity changes toyed enough Such ideas reach conclusion spark ignition its heavy coils radio interference problems bound better method So magneto coil flywheel grass trimmer engine Lawn Boy part #06823-07 -08 mounted front housing flywheel originally round cut dumbbell shape reduce weight Warning Dont try dodge engine turns up usual 9000 rpm dumb bell will fly apart prove have paint can hole waste basket large bulge sand annulus between containers Some sand flew out top flywheel broke Taking fatigue account wouldnt trust thing above 5000 rpm Top speed engine 16 x 10 hand-carved propeller around 4500 rpm coil called solid-state magneto spark discharge triggered same magnetic flux energizes coil inner secrets device seem proprietary two important observations can made knowing exactly works 1 no points wear Out 2 generates milder form radio-frequency noise either point systems capacitance discharge systems RF noise can effectively suppressed putting 10K resistor series plug putting shield over high-tension lead Until about 1979 engines being massproduced hobby use two-stroke type until flight 1981 World Records Power categories estab lished such engines Although experi mented earlier homemade four-stroke engines have better fuel efficiency perfecting engine Duration takes lots spare parts no serious effort made use such design until OS FS6O appeared engine remarkably well built have run 400 hours bearings piston fit compression practically good new Some problems however showed up valve/rocker-arm/cam system partly because very little lubricant being used effort attain high fuel efficiency Valve clearances reset three hours after 24 hours pushrods too short permit further adjustment problem partially fixed weakening shortening valve springs replacing pushrods pieces Allen hexwrench material 5/64 across flats tips pushrods tips cam follower pins hardened heating microtorch about 16000F near orange glow quenchingwith water No annealing tempering done after quench Next valve-drive cam started wear problem mitigated adding oil fuel drilling small breather hole crank case aft cam Oil thereby blown through cam housing splattering oil made new black mess inside models nose now valve system good 50 hours between adjustments next problem Carbon build-up valves spark plug choked engine stop about 10 hours unless baby-sat gradually backed out needle valve reached old bag tricks polyisobutylene chemical used manufacture synthetic rubber viscous liquid does pretty good job lubricating metals instead producing carbon particles cracks mostly combustible hydrocarbon molecules heated Presto Very little carbon formed fuel efficiency increased composition fuel 93% premium grade Mail YOUr Order To* Please Include $250 postage HARDWARE SYSTEMS handling 42a WushingRon Ave S.* Add $150 COD Eden Prairie Mm. 55344* Minn realdenta add 5% sales tax * Orders will shipped within 48 Phone *129418757hours INDIAN CITY RADIO CONTROL CLUB Presents DETROIT EXPO IV Greater Michigan Modelers Show PLANES BOATS 0 CARS MANUFACTURERS STATIC DISPLAYS0 SWAP-SHOP October 123 1982 Eight Mile Artillery Armory Oak Park Michigan Info 6909 Monroe Blvd Taylor MI 48180 U U U I I I like world-taits actual-Sullivan Insta-Just Plstk Conoar Starter. ine Handles feel good tn serve Hook hand can adjus*t quick Dattery itll 38$ IJ-2 especially suiia$e inftaine Incredible ill fit sizes Grab hold starter can shake huNts 5suppliesup ds enginesand unleaded gasoline 7% polyisobutylene tedious work dealt carbure tor standard RC-type needle valve could have installed would have defied simpli city rule Besides hearing poor US FS6O very quiet engine Instead built-in means keeping fuel-air ratio constant throughout power range sought car buretor 15cc OS 10 engine adapted inlet manifold mercury ma nometer attached monitor inlet-manifold pressure fuel fed engine via float chamber 50cc graduated burette needle valve first adjusted lean smooth running full throttle periodic readings rpm manifold pressure fuel level burette number proportional fuel-air ratio calculated Additional sets data recorded lower throttle settings fuel-air ratio never came out constant stock carburetor Usually mixture became very rith low power peculiarly-shaped notch carburetor barrel needed notch shape found grinding little testing fuel-air ratio over whole rpm range grinding little testing again etc etc got right third carburetor fifth weekend during long procedure got absent-minded forgot propeller revving front Ouch Shake shake shake Eventually continuous hands-oft run 50 hours duration made run engine mounted aircraft suspended elastic lines allow entire flight-ready assembly vibrate airborne often hears builder new airplane exclaim flew right off drawing board effusion signifies bad consisted Kraft 533 FM receiver Ace Bantam Midget servos placed far aft reduce chances ignition noise would Continued page 142 July 1982 135 IL GRAB HOLD ly iii th Sri I I I I I I I I I I practice really ought hang up new model shake about 15 minutes per pound before trying fly Controls fuselage radio equipment V -NW yone Sec after 100 pm September 22 touchdown Open apace available landing model chose sit down cook tent PAl rules require landing within 500 meters launch point spot within 10 meters although embarrassing acceptable No damage iota fuel left tank wuniversai type ror encauseg cowls Thrse tail tubes suit engine position Seiect tail pipe remove others desired 0 Small Compact easy attach Tsil pipe extension Included AII mounting hardware clamps screws included THREE SIZES EM-I -19 . 1195 EM-2 -40.. 1295 EM-345.80. 1430 leading dealers available ORDER DIRECT Add 10% postage handling Calif residents add 6% tsi Check Cod accepted_Supply card number date ViSi_or MASTER CARD manifold fit scale model cowls TWo exhaust tubes allow maximum sxhaust removal less heating PITTS STYLE MUFFLERS OFor scale aircraft such PiflS CESSNA 150 Angied exhaust tubee exit bottom cowling OWorm drive mounting strap OTait pipe extensions -. mounting hardwan -1 cause jitter excessive current drain servos As turned out precaution really necessary because very effective shielding eventually installed nickel-cadmium batteries special Hi-Rate type obtained Ace Radio Control can withstand severe over charging no need voltage regulator telemetering unit sensed current flowing out batteries monotonous musical note ground-based receiver gave pleasant assurance well board Servo motions could detected superimposed buzz since charging cur rent changed engine rpm pitch tone indicated engine speed Interference glitching due weak signals could also detected presence scratchy noise ominous sound wasnt heard during record flight polyhedral wing minimizes spiral instability basic model fuel shifting side wing other during uncoordinated turns generates quite load rudder work pilot So electrostatic stabilizer78910 used automatic wing leveling total weight system 1 oz equal hours worth fuel good trade Devices type can also used stabilize pitch attitude feature omitted instance Instead long tail large stabilizer used simple expedient provided substantial margin inher ent pitch stability precluded potential troubles related servo wear extra current drain active pitch stabilization loop Practice practice practice trials work air bugs out system com ponents installed model made relics left over 1960s record attempts flights during dusk dawn periods airplane cannot seen very well neither dark enough see small red green white navigation lights electrostatic stabilizer found big help during periods well during night visual determina tion attitude airplane based solely orientation three tiny candescent bulbs planned flight altitude about 1500 ft above ground 2000 ft above sea level array closely spaced color contrast strongly discernible staring star-like wanderers amongst Orion other rocks heavens hypnotic effect mesmerized keyed-up senses limit three four hours However FAI rule states no assistant pilots allowed use control transmitter electrostatic stabilizer served very effectively towards over coming roadblock Instead having pay attention compensate spiral instability able close eyes relax chaise lounge momentarily pulse control stick hard over response verbal commands observers could staring relays So cat skinned pretested equipment transferred new airframe July 4 baptismal flight mid-August assembly tortured 75 hours ground 25 hours air confidence machine very high remaining task flying 20 hours official witnesses would call some truly dedicated people Exciting boredom what John Worth called during previous 1964 record flight Care taken pick helpers officials qualities included patience stam ina sense humor Weather loomed last barrier model strong enough withstand fairly severe turbu lence avoid unpredictable thunderstorms keep pilots work acceptable level seemed wise wait calm characteristic equinoctial highs convectively stable masses hot air frequently stagnate area during last half September Synoptic weather information sources watched signs usually precede favorable conditions September 12 1 3 great crew officials off Bealeton VA running DCRCs annual Scale competition Wouldnt know year series rapidly-moving cold fronts followed September 20 crew gathered under drizzling clouds went through test run official weighing launching timing procedures next afternoon occluded front stretched east-west Kansas City Philadelphia rain 100 miles north field decided see far could get though 15-mph wind southeast partial overcast gray strato cumulus clouds Usually such conditions get worse before get better Rain high winds expected unless front changed its direction record flight launch went off planned 5 pm sundown 730 pm clouds cleared wind dead calm ground obviously flow 1500 ft model sat nearly stationary its airspeed matching wind must have near 20 mph southeast 830 pm observer method working well clear star-laden sky Two artificial satellites seen about time boredom relieved philosophical 142 Model Aviation I I Plasticote Propeller OR LARGE new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER LIGHTER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 discussions inspired sightings couple old Sputnik jokes came out woodwork too like Hey did hear Russians put 10 cows orbit say its herd shot round world midnight observers practiced giving yaw pitch trim commands competing see could hold new constellation stationary longest period long times could mistaken star got little sleepy missed few commands stir attention George Pickrell jumped up onto box bellowed Holy cats three guys coming over hill camels Theres nothing like healthy guffaw keep party alive About 2 am heavy ground fog formed stayed through night never grew thicker about 75 ft Sideways visibility 50 ft would have no way accom plish safe landing engine failed Vertically navigation lights stars could seen through cone-shaped hole 5 am wind aloft shifted west Hooray front moving away visibility cone however diminished about 200 included angle Ground equipment crew blankets soaked dew tension building because never flown through very foggy dawn six pairs eyes two pairs field glasses made 9 am thermal convection winds about 10 mph ground level causing model bounce nighttime observer procedure abandoned 1030 husky bumps causing excessive currents electrostatic stabilizer system aid shut down 1 pm 3V3 hours past prior record airplane performing admirably telemetry saying everthings fine grumpy over one-pilot rule otherwise felt OK landing 500 meters launch would scrub record claim decided wed done enough pushed engine shutdown button gust blew airplane onto collision couse wifes shiny new Honda during final approach interest continued harmony no choice except pull up over car model ignominously impaled corner pole cook tent 10 meters launch point home nonetheless valid claim record Inferred results implications gross takeoff weight model 498kg 1096 lbs 173kg 61 oz fuel model landed little half 089kg3 oz fuel still tank Thus model has theoretical capability flight excess 40 hours models gas mileage figure 1500 mpg its estimated FAI legal range wind nearly 1000 miles fuel consumption rate 42 gm/hr 15 oz/hr impressively low no miraculous engine efficiency involved performance As evidence consider following points model flown about 25 mph through flight probably has liftto-drag ratio about 10 speed Assuming propeller efficiency about 05 specific fuel consumption can calculated about 103 lb/hp-hr rae about 10 times smaller what goes nto two-cycle engines alcohol still nearly twice some larger four-cycle engines used manned air craft Further improvements engine therefore theoretically possible would easily achieved small size Continued page 146 Its incredible heres true Epoxy Paint thats Pre-mixed 000 can! 0@ RITES BLACK AARON PueIPrc42 pa Tnt No pot life ixing proof Lightweight r tough a Flexible C@/ERITE 420 BABYLON ROAD/HORSHAM PA 19044 Model Ii S th I10 5O1 4O IJ Local Dealer Send $1 00 Catalog Juiy 1982 143 System Hi-Starts 101 Ceeaplet Nt-Seen Kit Mie AeceenEly 14 Pound Pull tOO Feet Sleet Surgical Late Continuous Piece Section Reel Line Chute Stoke Tow Rings Hardware elig240o 102 Coenplcee 2-Mete Hi-Stan Kit 5 Pound Pill hO Feet 1 4 inch Slack Late Reel Line Chute Stake HardwCrC Etc $1700 103 Splaoetet Tobeg Opees Cl. Type tOO Feet Slack Surgical Late. 14 lb Pull $1800 104 Seplaoeerel Tebing 2-Megee S lb Poll S 500 10$ Nylee Hi-Stan UeeTwitted S 326 55 lb Test White ColorStaided g42S 106 Steedeed Pereehot Sd Celee Tow SinS5 325 105 Reel SiC Poe Hi-Stan Oteok Wied-UpLarge $ BOO CeterpletO Teogh Pleohe HdweeSmall 5 450 System II Winch 111 Pro-Lasech Coerteat WieOtt Mb ho Keen Edge State 01 art comelernlc ready-to-use less hatternI 12 oclt nonahie winch ncudecwheelc handle motor tuct twIn h reel ritnarcund oIl electrical wiring lice chute Hock-nc hatterc end ccii readn Ic fly S2$$00 112 Pre-tasech Wktch Preen. Seal Tureeroced includes drilled Iroere reel turnarnundS cairo $15000 107 Winch Cleat 18 led Ojeeseter 230 lb Teet Heauc DuIn Tow Sing Connecting Ring $825 105 Wiech Line 2000 Cl Scaided Nylee $3 lbTeet$1500 Choice ci Pill Test White Colot 1 tS lb Test $2000 Top Ouclito Acailable Soacral 153 lb Test $2600 Orders Othet Listed 180 lb Test $3200 System III Power Pod 110 Powee Pod desigeed Ed Ceontghtl Icr 2-mole sci Iclaces lihergiacs huill- ecira tank allowS tO mint- engine run fur use OdS metal lank engines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 P011 IN 47454 ELECTRONIC SERVICENTER FACTORY AUTHORIZED WARRANTY SERVICE FOR KRAFT over 35 other manufacturers Cleaning adjustment nsmitter receiver up 4 servos $2500 plus parts 24 HOUR SERVICE74 ZOUR SERVICE NEAL WARREN ~c13 South 21st Street Sp Philadelphia PA 19103 Tel 215 564-0800 Mon-Fri 9AM-53OPM Wed night till 8PM Sat 9AM Noon KIT S 9 Hi GLIDERS 3 SATELLITE KITS 17 OLD TIME GAS Send 25 for5 RUBBER 3 NORDICfine instruments 1980 catalog9 COMPETITION GASsmall craft & aircraft design FUEL DT TIMERS -$1075 eachOur comprehensive catalog return F Al Model SupplyBox 1534 Southold NY Ei P0 BOX 3957TORRANCE CA 90510inc 11971 516 765196Oar interesting Speculate what kind per formances might obtained all-out legal FAT model Suppose example spindly toothpicky monster model utmost structural efficiency made instead fairly robust Also assume use carbon fibers Kevlar titanium samarium cobalt magnets lith ium batteries solar cells tough microfilm coverings Further make tandem wing maximum allowable arear course install lightweight electrostatic pitch stabilizer allow equal loading both surfaces Work improving specific fuel consumption fly still slower speed long might fly Two hundred hours seems possible far Capa bility non-stop San Francisco Boston flight would reasonable expectation matter would New York Paris flight would some very difficult logistics problems associated such attempts have absolutely no interest trying prove can stay awake longer somebody elseso Itm inclined try something easier like tuming electrostatically- stabilized machines loose upper end Grand Canyon terrain avoidance features stabilizer would automatically steer machine down valley70 Wetd launch Moab UTr hop jet HooverDam sit inabartellingflyingstories waiting machine arrive day later Another dream another time Acknowledgements officials observers provided valuable help encouragement during record flight also during preparatory test flights am very grateful patience humor hard work contributed Mr Charles Calvert Contest Director Mr Wayne Simpsonr Mr Jack Anglin timers Mssrs Michael DeMuth George Pickrell Glen Scillian official observers pilOtrs assistants Helpful advice about lubrication problems obtained Mr Don Lindley Amoco Research Laboratories Mr Ray Cramer provided useful consultations aerodynamics Valuable technical assistance contributed members District Columbia Radio Control Club DCRC particular Mr Ben Givens worked telemetry devices Messrs Melvin Newcomer William Charbonneau Robert Lee assisted design fabri cation electrostatic stabilizer other electronic units Mr Paul Nash granted use runways gliderport Brookeville MD facility valuable asset project Mrs Lillian Goldfinger Johns Hopkins Uni versity Applied Physics LabAPL made useful suggestions patiently typed badly scribbled drafts Dr Gordon Dugger APL edited improved original manuscript effot greatly appreciated References I Hill ML. Beat RuSsians Bust Model Airplane News Vol 72 No Feb 1965 p 28 2 Hill ML. 27000 Feet Its Catbird Country Fisning Models #406 Jan 1971 p 18 3 Hill ML. Shuffle Off Buffalo Model Air plane News Vol 73 No 2 Feb 1966 p 30 4 Hill ML. II l Hours Exciting Boredom Firing Models #390 Sept 1969 p 6 5 Hill M L Tonoise World Speed Record Model Elsing Models *359 Jan 1967 p 20 6 Hill ML. Bong Boomer World Record Soaring Glider Fisring Models #360 Feb 1967 p 9 7 Hill ML. Introducing Electrostatic Autopilots Astronautics Aeronautics Vol 10 No 1 Nov 1972 pp 22-31 8 Hill ML. Electrostatic Autopilot RC MOdelsrr Flying Models #431 Feb 1973 p 20 9 Hill ML. Design Performance Electro statically Stabilized Delta Planform Mini RPVs Con ference Proceedings Milirarsr Electronics Defense Ex position Wiesbaden Germany Oct 977 Injeravia SA Geneva Switzerland pp 847-861 10 Hill ML. Whyte TR. Weiss RO. Rubio R Isquierdo M.Use Atmospheric Electric Fields Vertical Stabilization Terrain Avoidancerr Pro ceedings ofAJAA Guidance & Control Conf Albu querque NM. August 19-21 1981 ATAA Paper *81-I 848-CP AMA Building/Mankowski Continued page 45 New Chaiter Members AMA Builders plaques recognizing $500 contributions Ilsis lnonth Free Flight Model Airplanc Association Southern California Northern Virginia Radio Control Inc Detroit Aero Modeler RCr tner Robert Reder Walter Hartung Contributing Members Honor Roll listing donations $100 up now included Sooner Circle Burners Kennebec Valley Mod el Avialors Twin City Radio Controllers Inc l-lightmasters Klamath Falls Cincin nati Aero Modelers San Gabriel Valley RC League WINGSr Tidewater RC Club Ever green Radio Modelers Association Monmouth Model Airplane Club Skylarks Sharon McDonnell-Douglas RC Club Memphis Prop Rusters Niagra County RC Club Sacramento RC Club Reno Radio Control Club Greater Cincinnati RC Arvada Associated Modelers Goodyear Model Aircraft Club Niagara Sun day l1rers Inc Pomona Valley Model Air plane ClObr Riverside RC Club again Alfred Twyla Lchmberg Robert Krafft Carl Otto Margaret Walinski John Williams John Grigg Ed Louise 146 Model Aviation PRC LRUflCH SYSTEMS Rugged Simplicity Top Performance Reasonable Price Oreect 5alee/ Ida MiddleMen/Hi-5taetoAle KitFoemftd Minute Aasewblv 7 Coerplete looteuctruce Included No special 71010 Regoreed / Seod SANE Fun Funhen lirfeematron Ordee List peodoots Total / Add S200 Skipping gend Menen aede Cheeb CreditCord Notetbet end Eep Data/COO Add 5150/ Aleska Add 5350 / Hawaii Will COO Shipping Mail ot Phone I Wiech OtiterePegeteet Adneeco Will COO Phone Orders Waloerne / Mail Order Phone Orders nS/ Welcome
Edition: Model Aviation - 1982/07
Page Numbers: 78, 79, 80, 81, 133, 134, 135, 142, 143, 146
NO OCR TEXT Victory brings out smiles faces tired crew after 20-hr flight near Brookeville MD September 21-22 1 gai DCRC members worked hard during preparatory flights well official attempt Left right Mike DeMuth pilots assistant Jack Anglin Wayne Simpson timers Maynard Hill pilot George Pickrell Charlie Calvert CD Glen Scillian assistant CD Secrets success revealed test took literally years planning new FAI Dura tion World Record just over 20 hours powered RC models pilot estab lished last Septem ber lot problems solved keep model airthat long man set record describes prob lems trials errors eventual success unique flying machine planes may seem ugly facts boxes dont try move too fast Mother Nature puts some beautiful useful curves invisible air flowing near Inside boxes Well New Faithfuls internals also lessthan-elegant appearance Wires springs fuel tubes lacing cords shock-mounted para phernalia tangled end end scene included few splotches dried blood deposited evidence elbows propellers dont mix Any way look machine beautiful accurate adjective something admirable about way models guts frame muscles operated produce desired performance Twenty-five explosions per second shook machine like being hit tympanists mallet mezzo-forte Cranks turned valves slid bearings twirled gears whined sparks zapped springs twanged pushrods rocker arms beat tickety-tack rhythm against drone vibrating drum-tight skins cacaphony compounded whooshing propeller piccolo-like whistle air rushing tiny carburetor Indoors trillions electrons shoved alternator through maze diodes chips chokes connector plugs rainbow-colored harness wires move motors gears July 198279 Truss structures false ribs holey main ribs balsa box fuel tank visible shot Fuselage bottoms wing tips andstab covered wIth white opaque MonoKote remainder translucent orange scheme viewed best compromise visibility night during day Lights located teardrop-shaped lenses wing tip under stab Dark patches wing tips copper tape Staticmaster ionizers used part electrostatic wing leveller Flywheel magneto look like ugly bulges aerodynamic penalty small linkages Incandescent lights glowed wing tip atmospheric ions also being interrogated get reports bank angle happened comfortable womb laboratory out Mother Natures soggy foggy bumpy atmosphere very gratifing experience coax machine through two million thumps missed beat project hobby venture extraneous authors profession deals development remotely-piloted vehicles goal fly long time approach keep simple schedule whenever ready motivation fun Some aeromodeling techniques equipment employed may practical interest responsible developing long-duration drones unmanned vehicles UVs com munication relays decoys surveillance elec tronic countermeasures other uses idea model airplane technology might used reduce cost operational military systems very popular early 70s mixed reviews its merits have cropped up because some goals expectations went out bounds Perhaps article will bolster fundamentally sound idea would gratifying result However inside out side secrets New Faithful will exposed primarily help modelers also perhaps steer few fun breaking records Features New Faithful crate-like appear ance New Faithful consequence FAI rule limits Scale models gross takeoffweight 5 kg 1102 lb Aerobatic racing models seldom approach limit Duration models restriction means way increase fuel capacity decrease structural weight Engine displacement limited 10cc 061 cu lifting surface areawing tail restricted l5m sq 1615 sq ft neither rules influenced design wing sized fit inside Toyota Hatchback although largest per missible engine installed normally loafed 80 Model Aviation Left Charlie Calvert CD congratulates Maynard Hill Lots things have changed since similar picture made Frank Ehling Hill Old Faithful September1904 Planes look alike bellies larger important valuable changes have brought hobby AMA Only 18000 members got black-and-white pamphlet 1964 AMA close trouble now iargest sport aviation organization world Modified 05 FS6O used New Faithful mounted horizontally vibration dampening Reworked 05 10 throttle used Text explains lubrication wear problems magneto-flywheel spark ignition system Warningread text about flywheel shape Vibration testing done hanging model coat hangers foam pads elastic lines running ceiling back porch Hill FlyBy Night Aircraft Co Tail tied spring-loaded storm door door opening used approximate prop thrust Fuel frothing servowear other problems can detected method author recommends forchainsaw-powered models New Faithful wentthrough continuous 50-hour run prior its first test flight along 20% full power model size configuration could probably climb Out gross weight 11 lb loaded maximum fuel would have potential flight 200hr duration 6400-km 4000-mi range FAIs technical rules sensible promote safety provide common basis world-wide comparison generate some tough challenges rule permits pilot handle radio controls however would have repealed Duration records much beyond present made possible Editor FAIModel Committee ClAM has agreed provide pilot relief during such record attempts Subject approval overall FAI Sporting Com mittee will effective 1983 Development airplane matter putting some old principles together func tional way Reliability obtained fixing changing things failed during hours testing approach solving problems always seek simpler principle rather add complicated parts key functional components shown structural drawing engine modified 05 FS6O FS means four-stroke Fuel fed carburetor tank wing Fuel flow rate pressure steadied inter dicting float chamber Herein lies reason droop snoot Gravity dependable pumps modified bicycle alternator connected engine power takeoff through 21 step-up gear train Electric power alternator rectified dc filtered choked RF delivered aft under stabilizer RC receiver servos set small 100 mAh nickel-cadmium batteries located batteries provide safe landing case engine failure alternator powers control equipment three tiny lights needed wing tips tail night flying Also wing tips Staticmaster ionization units used electro static autopilot senses vector electric field exists atmosphere thereb4 Jrovides automatic leveling wings l telemetry transmitter hangs its dipole antenna station forward electrostatic stabilizer shown another vital unit Kraft transmitter flight tied automobile battery Thats put fuel tank spin prop life thing sustains itself least 20 hours airframe Balsa wood bridge-truss structures efficient easy build Streamlining boxes would add weight worth category competition Most airframe made ofcontest grade balsa coveringis Top Flites MonoKate fuselage outer wing panels stabilizer white opaque remainder translucent orange combination chosen best compromise daytime nighttime visibility bridge-truss spar wing front member protrudes way promotes early Onset turbulence boundary layer Usually airplane designers try keep boundary layers laminar over first half wing chord slow-flying models its easy induce laminar boundary layer persist too far flow can separate easily rear portion airfoil separation occursand probably will bumpy air en counteredthe result can drag force consid erably larger associated tripped turbulent boundary layer tends stay attached fuel tank does double duty center wing spar assembly 1/16 00 e 00 OCo tii~n 332 v0r 322 t8t5 23 212334 25 2357 5 10 1112150 O Propellor 16 dia tO pitch O Magneto & flywheel 05F560 engine modified @ 0S10 carbureto, modified Cam housing rea power take-off Filler made-from chemists filter paper O Float chamber Flearbie coupling rubber auto fuel hosel Two utep op gear train Fleoible coupling tygon tuhiegi Bicycle alternator @ Rectifier filter 6J Filters mesh iretal 3 200 mesh nylon er paper 062 Fuei tank sump also main center spar Telemetry transmitter j Incandescent bulbSO ma @SV red & greee lenses Stattcmaster 2y 500 ionizer Grounded guard strip copper tapel Auxiliary collector copper tapel @ Electrostatic autopilot Same 16 white lens @ Throttle serno Elevator rudder servos Kraft KP7F receiner @ Battery pack 1100 maHi NEW FAITHFUL cture componBnt layout sheets contest grade balsa coated internally epoxy resins impervious gasoline polyester resin covered externally fuel discussed later failures can result single layer fiberglass i/a oz/sq yd impreg- additions nitromethane propylene oxide ether nated same resin Most polyester Continued page 133 July 198281 Super Mini Boy Recommended Eigines Radios- Mufflers Helicopter tools stock Worlds stable easiest fly small 40 size R/O Helicopter Low maintenance mechanics engineer ed Dieter Schiuter Father RIO Helicopters Features fully collective Bell mixing main rotor head upright spinner starting straight shaft driven tail rotor & automatic compensation symmet rical prebuilt main rotor tail rotor blades autorotation clutch Uses standard 4 chanel radio Kits parts stock guarantee helicopters fly Ask man flies Move up Schiuter inSifrp U SEAN IflG subsidiary MINIATURE AIRCRAFT 2594 North Orange Blossom Trail ndo FL 32804 Phone 30514224531 test fuselages six flight fuselages high-altitude version Ranger V- 12 seriously delayed XP-77 use low-altitude engine its performance would inferior fighter airplane comparison existing models now production ac cording USAAF Technical Report #5359 Vidal Research took over job building wings made schedule slip Problems arose over matters basic time needed spread glue Completion first airplane delayed February 1944 Marcfr would make almost 1 years late wasnt until April Fools Day 1944 XP-77 flew Bells Niagra Falls NY factory Success last Far proto type arrived Wright Field May 2 soon revealed serious vibration 1700 rpm 2300 rpm probably due lack shock absorbers engine mounts June 6 1944 Allied troops storming Nor mandy beaches final assault Nazi-held Europe USAAF got around giving prototype XP-77 its serial number 43-34915 Official flight tests carried out Eglin Field FL second XP-77 43-34916 starting late July 1944 October 2 airplane fell out Immelmann turn inverted spin pilot recovered air plane went upright flat spin could recover forced jump pilot landed safely airplane demolished proved last straw project ended December 2 March 1945 war drawing close Army Air Forces completed report Flight Tests Bell XP-77 Airplane following has excerpted general handling characteristics XP-77 airplane satisfactory although restric tions evented dives spins violent maneuvers jectionable feature control system fixed trim tabs ailerons rudder results condition flight airplane will fly stick- rudder-free ground setting the. tabs Visibility good conditions flight ground handling Noise vibration cockpit considerable cockpit becomes very cold uncomfortable cold weather high altitude cockpit heat available high speed 328 mph obtained military power 3150 rpm 416 mani fold pressure 12600 ft critical altitude high speed 330 mph obtained war emergencypower 3300 rpm and57 at4000 ft critical altitude maximum rate climb obtained war emergency power 3630 feet per minute critical altitude 2000 ft ConclusionsThe overall performance XP-77 airplane inferior present fighter aircraft employed AAF results flight tests considerably lower estimated performance set Bell Aircraft Corp maximum speed airplane war emergency power considerably lower other AAF interceptor aircraft operating military power maximum rate climb military power very low interceptor air craft low service ceiling airplane renders useless against high altitude aircraft bad XP-77 fell 90 mph short its promised top speed rate climb no better 200-hp Pins Special aerobatic biplane service ceiling 30000 ft era P-38s would go 39000 ft P 51s would top 40000 ft interesting idea didnt work taught its creators lesson very very difficult build truly lightweight fighter plane General Dynamics learning lesson over again its F- 16 no longer lightweight Mach 2 ter course doesnt make sense give up such worthy goal As matter fact start Cassutt will close 250 mph 135-hp weighing little over 500 lb add couple machine guns some fuel radio two ours/Hill Continued page 80 other useful ingredients avoid building wing spar might dis solve its contents during flight samples balsa coated variety resins placed baby food jars containing candidate fuels array samples stored months backyard greenhouse exposure thermal cycling solvents brutal test Some combinations looked satisfactory dur ing winter turned messes July Sig Mfg Cos polyester finishing resin eventually chosen K&B finishing resin fared equally well test Scale modelers using chainsaw engines might find idea useful Its OK gasoline havent found resins will resist fuels containing nitromethane ether Engine modifications OS F560 engine received designed use glow plug ignition regular alcohol-based model fuel Gasoline far efficient alcohol glow plug ignition doesnt work well gasoline based fuels unless compression ratio increased point mechanical problems July 1982 133 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS 444444444* **4ATYOURFINoERTIPS4444MAYU* * Watch For**SHOWED ALLOY PARTS WITH* ***NO ORGANIZER AT OVER FIFTY* *Upcoming Ktsl**OOLLARS THAN TWICEOUR* *** 495* ****************44444444*444444* HSA735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST 2-56 3 16 SOCKET HEAD CAP SCREW 2-56 1 4 SOCKET HEAD CAP SCREW 3-56 I 2 SOCKET HEAD CAP SCREW 4-40 I 4 SOCKET HEAD CAP SCREW 4-40 1 2 SOCKET HEAD CAP SCREW 4-40 34 SOCKET HEAD CAP SCREW 4-40 1 SOCKET HEAD CAP SCREW 6-32 1 4 SOCKET HEAD CAP SCREW 6-32 I 2 SOCKET HEAD CAP SCREW 6-32 34 SOCKET HEAD CAP SCREW 6-32 1 SOCKET HEAD CAP SCREW 6-32 l SOCKET HEAD CAP SCREW 6-32 2 SOCKET HEAD CAP SCREW FLAT WASHERS SAE ZINC PLATED 2 4 iii~ PCS 25 25 25 20 20 20 20 IS 15 IS 15 15 15 75 50 75 90 TOTAL PCS 735 5 NYLON INSERT LOCK NUTS ZINC PLATED 2-56 4-40 6-32 * * * **** ********************* KITS COME COMPLETE WITH 18 COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER ONLY $2495 NEW THE POWRWIr%IC4ANDTHE RETRIEVER POW RWINCH perfect casanion * $27500 RErRThVER Both units use special plus shipping 4pole permanent magnet lc* current drain less battery 12 volt nortor design also inCnrpor ates lighteeight heavy duty welded arKi painted steel frane features adjustable nvtor sounting plate insure proper drive tension PCM R b mater unlimited ttnnaters WINaS has handle either ,u anythirsg between rid pro tected font switch operation ed towline druis a-sstruction required anti-kiting braking can readily disengaged e Manual drun brake retrieval takeup antrol 2000 feet braided nylon line tCs riixn ball-beering swivel bearing turnaround hub RETR EVER will eliminate losing turn frequency because long turnaround tines retrieving lines Line orossings due wind shifts using multiple winches will longer probl40n Best 11 have launch-a-minute capability Other features incltxle e Drag-free operation due flycasting imde Battery cables heavy duty clips feet braided nylon line ball bearing swivel Guide line aligrinent takeup nEsie nd prevent line tangling drive shaft WRITE FOR MORE I14FO1L&flON 4DAVEY $22500SYSTEMS plusmFinE CORPORATION shippingONE WOOD LANEMALVERNPA19355 * INTRODUCTORY PRICE 1982 134 Model Aviation severe Furthermore fuel-air mixtures become extremely critical Sensitive temperature humidity changes toyed enough Such ideas reach conclusion spark ignition its heavy coils radio interference problems bound better method So magneto coil flywheel grass trimmer engine Lawn Boy part #06823-07 -08 mounted front housing flywheel originally round cut dumbbell shape reduce weight Warning Dont try dodge engine turns up usual 9000 rpm dumb bell will fly apart prove have paint can hole waste basket large bulge sand annulus between containers Some sand flew out top flywheel broke Taking fatigue account wouldnt trust thing above 5000 rpm Top speed engine 16 x 10 hand-carved propeller around 4500 rpm coil called solid-state magneto spark discharge triggered same magnetic flux energizes coil inner secrets device seem proprietary two important observations can made knowing exactly works 1 no points wear Out 2 generates milder form radio-frequency noise either point systems capacitance discharge systems RF noise can effectively suppressed putting 10K resistor series plug putting shield over high-tension lead Until about 1979 engines being massproduced hobby use two-stroke type until flight 1981 World Records Power categories estab lished such engines Although experi mented earlier homemade four-stroke engines have better fuel efficiency perfecting engine Duration takes lots spare parts no serious effort made use such design until OS FS6O appeared engine remarkably well built have run 400 hours bearings piston fit compression practically good new Some problems however showed up valve/rocker-arm/cam system partly because very little lubricant being used effort attain high fuel efficiency Valve clearances reset three hours after 24 hours pushrods too short permit further adjustment problem partially fixed weakening shortening valve springs replacing pushrods pieces Allen hexwrench material 5/64 across flats tips pushrods tips cam follower pins hardened heating microtorch about 16000F near orange glow quenchingwith water No annealing tempering done after quench Next valve-drive cam started wear problem mitigated adding oil fuel drilling small breather hole crank case aft cam Oil thereby blown through cam housing splattering oil made new black mess inside models nose now valve system good 50 hours between adjustments next problem Carbon build-up valves spark plug choked engine stop about 10 hours unless baby-sat gradually backed out needle valve reached old bag tricks polyisobutylene chemical used manufacture synthetic rubber viscous liquid does pretty good job lubricating metals instead producing carbon particles cracks mostly combustible hydrocarbon molecules heated Presto Very little carbon formed fuel efficiency increased composition fuel 93% premium grade Mail YOUr Order To* Please Include $250 postage HARDWARE SYSTEMS handling 42a WushingRon Ave S.* Add $150 COD Eden Prairie Mm. 55344* Minn realdenta add 5% sales tax * Orders will shipped within 48 Phone *129418757hours INDIAN CITY RADIO CONTROL CLUB Presents DETROIT EXPO IV Greater Michigan Modelers Show PLANES BOATS 0 CARS MANUFACTURERS STATIC DISPLAYS0 SWAP-SHOP October 123 1982 Eight Mile Artillery Armory Oak Park Michigan Info 6909 Monroe Blvd Taylor MI 48180 U U U I I I like world-taits actual-Sullivan Insta-Just Plstk Conoar Starter. ine Handles feel good tn serve Hook hand can adjus*t quick Dattery itll 38$ IJ-2 especially suiia$e inftaine Incredible ill fit sizes Grab hold starter can shake huNts 5suppliesup ds enginesand unleaded gasoline 7% polyisobutylene tedious work dealt carbure tor standard RC-type needle valve could have installed would have defied simpli city rule Besides hearing poor US FS6O very quiet engine Instead built-in means keeping fuel-air ratio constant throughout power range sought car buretor 15cc OS 10 engine adapted inlet manifold mercury ma nometer attached monitor inlet-manifold pressure fuel fed engine via float chamber 50cc graduated burette needle valve first adjusted lean smooth running full throttle periodic readings rpm manifold pressure fuel level burette number proportional fuel-air ratio calculated Additional sets data recorded lower throttle settings fuel-air ratio never came out constant stock carburetor Usually mixture became very rith low power peculiarly-shaped notch carburetor barrel needed notch shape found grinding little testing fuel-air ratio over whole rpm range grinding little testing again etc etc got right third carburetor fifth weekend during long procedure got absent-minded forgot propeller revving front Ouch Shake shake shake Eventually continuous hands-oft run 50 hours duration made run engine mounted aircraft suspended elastic lines allow entire flight-ready assembly vibrate airborne often hears builder new airplane exclaim flew right off drawing board effusion signifies bad consisted Kraft 533 FM receiver Ace Bantam Midget servos placed far aft reduce chances ignition noise would Continued page 142 July 1982 135 IL GRAB HOLD ly iii th Sri I I I I I I I I I I practice really ought hang up new model shake about 15 minutes per pound before trying fly Controls fuselage radio equipment V -NW yone Sec after 100 pm September 22 touchdown Open apace available landing model chose sit down cook tent PAl rules require landing within 500 meters launch point spot within 10 meters although embarrassing acceptable No damage iota fuel left tank wuniversai type ror encauseg cowls Thrse tail tubes suit engine position Seiect tail pipe remove others desired 0 Small Compact easy attach Tsil pipe extension Included AII mounting hardware clamps screws included THREE SIZES EM-I -19 . 1195 EM-2 -40.. 1295 EM-345.80. 1430 leading dealers available ORDER DIRECT Add 10% postage handling Calif residents add 6% tsi Check Cod accepted_Supply card number date ViSi_or MASTER CARD manifold fit scale model cowls TWo exhaust tubes allow maximum sxhaust removal less heating PITTS STYLE MUFFLERS OFor scale aircraft such PiflS CESSNA 150 Angied exhaust tubee exit bottom cowling OWorm drive mounting strap OTait pipe extensions -. mounting hardwan -1 cause jitter excessive current drain servos As turned out precaution really necessary because very effective shielding eventually installed nickel-cadmium batteries special Hi-Rate type obtained Ace Radio Control can withstand severe over charging no need voltage regulator telemetering unit sensed current flowing out batteries monotonous musical note ground-based receiver gave pleasant assurance well board Servo motions could detected superimposed buzz since charging cur rent changed engine rpm pitch tone indicated engine speed Interference glitching due weak signals could also detected presence scratchy noise ominous sound wasnt heard during record flight polyhedral wing minimizes spiral instability basic model fuel shifting side wing other during uncoordinated turns generates quite load rudder work pilot So electrostatic stabilizer78910 used automatic wing leveling total weight system 1 oz equal hours worth fuel good trade Devices type can also used stabilize pitch attitude feature omitted instance Instead long tail large stabilizer used simple expedient provided substantial margin inher ent pitch stability precluded potential troubles related servo wear extra current drain active pitch stabilization loop Practice practice practice trials work air bugs out system com ponents installed model made relics left over 1960s record attempts flights during dusk dawn periods airplane cannot seen very well neither dark enough see small red green white navigation lights electrostatic stabilizer found big help during periods well during night visual determina tion attitude airplane based solely orientation three tiny candescent bulbs planned flight altitude about 1500 ft above ground 2000 ft above sea level array closely spaced color contrast strongly discernible staring star-like wanderers amongst Orion other rocks heavens hypnotic effect mesmerized keyed-up senses limit three four hours However FAI rule states no assistant pilots allowed use control transmitter electrostatic stabilizer served very effectively towards over coming roadblock Instead having pay attention compensate spiral instability able close eyes relax chaise lounge momentarily pulse control stick hard over response verbal commands observers could staring relays So cat skinned pretested equipment transferred new airframe July 4 baptismal flight mid-August assembly tortured 75 hours ground 25 hours air confidence machine very high remaining task flying 20 hours official witnesses would call some truly dedicated people Exciting boredom what John Worth called during previous 1964 record flight Care taken pick helpers officials qualities included patience stam ina sense humor Weather loomed last barrier model strong enough withstand fairly severe turbu lence avoid unpredictable thunderstorms keep pilots work acceptable level seemed wise wait calm characteristic equinoctial highs convectively stable masses hot air frequently stagnate area during last half September Synoptic weather information sources watched signs usually precede favorable conditions September 12 1 3 great crew officials off Bealeton VA running DCRCs annual Scale competition Wouldnt know year series rapidly-moving cold fronts followed September 20 crew gathered under drizzling clouds went through test run official weighing launching timing procedures next afternoon occluded front stretched east-west Kansas City Philadelphia rain 100 miles north field decided see far could get though 15-mph wind southeast partial overcast gray strato cumulus clouds Usually such conditions get worse before get better Rain high winds expected unless front changed its direction record flight launch went off planned 5 pm sundown 730 pm clouds cleared wind dead calm ground obviously flow 1500 ft model sat nearly stationary its airspeed matching wind must have near 20 mph southeast 830 pm observer method working well clear star-laden sky Two artificial satellites seen about time boredom relieved philosophical 142 Model Aviation I I Plasticote Propeller OR LARGE new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER LIGHTER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 discussions inspired sightings couple old Sputnik jokes came out woodwork too like Hey did hear Russians put 10 cows orbit say its herd shot round world midnight observers practiced giving yaw pitch trim commands competing see could hold new constellation stationary longest period long times could mistaken star got little sleepy missed few commands stir attention George Pickrell jumped up onto box bellowed Holy cats three guys coming over hill camels Theres nothing like healthy guffaw keep party alive About 2 am heavy ground fog formed stayed through night never grew thicker about 75 ft Sideways visibility 50 ft would have no way accom plish safe landing engine failed Vertically navigation lights stars could seen through cone-shaped hole 5 am wind aloft shifted west Hooray front moving away visibility cone however diminished about 200 included angle Ground equipment crew blankets soaked dew tension building because never flown through very foggy dawn six pairs eyes two pairs field glasses made 9 am thermal convection winds about 10 mph ground level causing model bounce nighttime observer procedure abandoned 1030 husky bumps causing excessive currents electrostatic stabilizer system aid shut down 1 pm 3V3 hours past prior record airplane performing admirably telemetry saying everthings fine grumpy over one-pilot rule otherwise felt OK landing 500 meters launch would scrub record claim decided wed done enough pushed engine shutdown button gust blew airplane onto collision couse wifes shiny new Honda during final approach interest continued harmony no choice except pull up over car model ignominously impaled corner pole cook tent 10 meters launch point home nonetheless valid claim record Inferred results implications gross takeoff weight model 498kg 1096 lbs 173kg 61 oz fuel model landed little half 089kg3 oz fuel still tank Thus model has theoretical capability flight excess 40 hours models gas mileage figure 1500 mpg its estimated FAI legal range wind nearly 1000 miles fuel consumption rate 42 gm/hr 15 oz/hr impressively low no miraculous engine efficiency involved performance As evidence consider following points model flown about 25 mph through flight probably has liftto-drag ratio about 10 speed Assuming propeller efficiency about 05 specific fuel consumption can calculated about 103 lb/hp-hr rae about 10 times smaller what goes nto two-cycle engines alcohol still nearly twice some larger four-cycle engines used manned air craft Further improvements engine therefore theoretically possible would easily achieved small size Continued page 146 Its incredible heres true Epoxy Paint thats Pre-mixed 000 can! 0@ RITES BLACK AARON PueIPrc42 pa Tnt No pot life ixing proof Lightweight r tough a Flexible C@/ERITE 420 BABYLON ROAD/HORSHAM PA 19044 Model Ii S th I10 5O1 4O IJ Local Dealer Send $1 00 Catalog Juiy 1982 143 System Hi-Starts 101 Ceeaplet Nt-Seen Kit Mie AeceenEly 14 Pound Pull tOO Feet Sleet Surgical Late Continuous Piece Section Reel Line Chute Stoke Tow Rings Hardware elig240o 102 Coenplcee 2-Mete Hi-Stan Kit 5 Pound Pill hO Feet 1 4 inch Slack Late Reel Line Chute Stake HardwCrC Etc $1700 103 Splaoetet Tobeg Opees Cl. Type tOO Feet Slack Surgical Late. 14 lb Pull $1800 104 Seplaoeerel Tebing 2-Megee S lb Poll S 500 10$ Nylee Hi-Stan UeeTwitted S 326 55 lb Test White ColorStaided g42S 106 Steedeed Pereehot Sd Celee Tow SinS5 325 105 Reel SiC Poe Hi-Stan Oteok Wied-UpLarge $ BOO CeterpletO Teogh Pleohe HdweeSmall 5 450 System II Winch 111 Pro-Lasech Coerteat WieOtt Mb ho Keen Edge State 01 art comelernlc ready-to-use less hatternI 12 oclt nonahie winch ncudecwheelc handle motor tuct twIn h reel ritnarcund oIl electrical wiring lice chute Hock-nc hatterc end ccii readn Ic fly S2$$00 112 Pre-tasech Wktch Preen. Seal Tureeroced includes drilled Iroere reel turnarnundS cairo $15000 107 Winch Cleat 18 led Ojeeseter 230 lb Teet Heauc DuIn Tow Sing Connecting Ring $825 105 Wiech Line 2000 Cl Scaided Nylee $3 lbTeet$1500 Choice ci Pill Test White Colot 1 tS lb Test $2000 Top Ouclito Acailable Soacral 153 lb Test $2600 Orders Othet Listed 180 lb Test $3200 System III Power Pod 110 Powee Pod desigeed Ed Ceontghtl Icr 2-mole sci Iclaces lihergiacs huill- ecira tank allowS tO mint- engine run fur use OdS metal lank engines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 P011 IN 47454 ELECTRONIC SERVICENTER FACTORY AUTHORIZED WARRANTY SERVICE FOR KRAFT over 35 other manufacturers Cleaning adjustment nsmitter receiver up 4 servos $2500 plus parts 24 HOUR SERVICE74 ZOUR SERVICE NEAL WARREN ~c13 South 21st Street Sp Philadelphia PA 19103 Tel 215 564-0800 Mon-Fri 9AM-53OPM Wed night till 8PM Sat 9AM Noon KIT S 9 Hi GLIDERS 3 SATELLITE KITS 17 OLD TIME GAS Send 25 for5 RUBBER 3 NORDICfine instruments 1980 catalog9 COMPETITION GASsmall craft & aircraft design FUEL DT TIMERS -$1075 eachOur comprehensive catalog return F Al Model SupplyBox 1534 Southold NY Ei P0 BOX 3957TORRANCE CA 90510inc 11971 516 765196Oar interesting Speculate what kind per formances might obtained all-out legal FAT model Suppose example spindly toothpicky monster model utmost structural efficiency made instead fairly robust Also assume use carbon fibers Kevlar titanium samarium cobalt magnets lith ium batteries solar cells tough microfilm coverings Further make tandem wing maximum allowable arear course install lightweight electrostatic pitch stabilizer allow equal loading both surfaces Work improving specific fuel consumption fly still slower speed long might fly Two hundred hours seems possible far Capa bility non-stop San Francisco Boston flight would reasonable expectation matter would New York Paris flight would some very difficult logistics problems associated such attempts have absolutely no interest trying prove can stay awake longer somebody elseso Itm inclined try something easier like tuming electrostatically- stabilized machines loose upper end Grand Canyon terrain avoidance features stabilizer would automatically steer machine down valley70 Wetd launch Moab UTr hop jet HooverDam sit inabartellingflyingstories waiting machine arrive day later Another dream another time Acknowledgements officials observers provided valuable help encouragement during record flight also during preparatory test flights am very grateful patience humor hard work contributed Mr Charles Calvert Contest Director Mr Wayne Simpsonr Mr Jack Anglin timers Mssrs Michael DeMuth George Pickrell Glen Scillian official observers pilOtrs assistants Helpful advice about lubrication problems obtained Mr Don Lindley Amoco Research Laboratories Mr Ray Cramer provided useful consultations aerodynamics Valuable technical assistance contributed members District Columbia Radio Control Club DCRC particular Mr Ben Givens worked telemetry devices Messrs Melvin Newcomer William Charbonneau Robert Lee assisted design fabri cation electrostatic stabilizer other electronic units Mr Paul Nash granted use runways gliderport Brookeville MD facility valuable asset project Mrs Lillian Goldfinger Johns Hopkins Uni versity Applied Physics LabAPL made useful suggestions patiently typed badly scribbled drafts Dr Gordon Dugger APL edited improved original manuscript effot greatly appreciated References I Hill ML. Beat RuSsians Bust Model Airplane News Vol 72 No Feb 1965 p 28 2 Hill ML. 27000 Feet Its Catbird Country Fisning Models #406 Jan 1971 p 18 3 Hill ML. Shuffle Off Buffalo Model Air plane News Vol 73 No 2 Feb 1966 p 30 4 Hill ML. II l Hours Exciting Boredom Firing Models #390 Sept 1969 p 6 5 Hill M L Tonoise World Speed Record Model Elsing Models *359 Jan 1967 p 20 6 Hill ML. Bong Boomer World Record Soaring Glider Fisring Models #360 Feb 1967 p 9 7 Hill ML. Introducing Electrostatic Autopilots Astronautics Aeronautics Vol 10 No 1 Nov 1972 pp 22-31 8 Hill ML. Electrostatic Autopilot RC MOdelsrr Flying Models #431 Feb 1973 p 20 9 Hill ML. Design Performance Electro statically Stabilized Delta Planform Mini RPVs Con ference Proceedings Milirarsr Electronics Defense Ex position Wiesbaden Germany Oct 977 Injeravia SA Geneva Switzerland pp 847-861 10 Hill ML. Whyte TR. Weiss RO. Rubio R Isquierdo M.Use Atmospheric Electric Fields Vertical Stabilization Terrain Avoidancerr Pro ceedings ofAJAA Guidance & Control Conf Albu querque NM. August 19-21 1981 ATAA Paper *81-I 848-CP AMA Building/Mankowski Continued page 45 New Chaiter Members AMA Builders plaques recognizing $500 contributions Ilsis lnonth Free Flight Model Airplanc Association Southern California Northern Virginia Radio Control Inc Detroit Aero Modeler RCr tner Robert Reder Walter Hartung Contributing Members Honor Roll listing donations $100 up now included Sooner Circle Burners Kennebec Valley Mod el Avialors Twin City Radio Controllers Inc l-lightmasters Klamath Falls Cincin nati Aero Modelers San Gabriel Valley RC League WINGSr Tidewater RC Club Ever green Radio Modelers Association Monmouth Model Airplane Club Skylarks Sharon McDonnell-Douglas RC Club Memphis Prop Rusters Niagra County RC Club Sacramento RC Club Reno Radio Control Club Greater Cincinnati RC Arvada Associated Modelers Goodyear Model Aircraft Club Niagara Sun day l1rers Inc Pomona Valley Model Air plane ClObr Riverside RC Club again Alfred Twyla Lchmberg Robert Krafft Carl Otto Margaret Walinski John Williams John Grigg Ed Louise 146 Model Aviation PRC LRUflCH SYSTEMS Rugged Simplicity Top Performance Reasonable Price Oreect 5alee/ Ida MiddleMen/Hi-5taetoAle KitFoemftd Minute Aasewblv 7 Coerplete looteuctruce Included No special 71010 Regoreed / Seod SANE Fun Funhen lirfeematron Ordee List peodoots Total / Add S200 Skipping gend Menen aede Cheeb CreditCord Notetbet end Eep Data/COO Add 5150/ Aleska Add 5350 / Hawaii Will COO Shipping Mail ot Phone I Wiech OtiterePegeteet Adneeco Will COO Phone Orders Waloerne / Mail Order Phone Orders nS/ Welcome
Edition: Model Aviation - 1982/07
Page Numbers: 78, 79, 80, 81, 133, 134, 135, 142, 143, 146
NO OCR TEXT Victory brings out smiles faces tired crew after 20-hr flight near Brookeville MD September 21-22 1 gai DCRC members worked hard during preparatory flights well official attempt Left right Mike DeMuth pilots assistant Jack Anglin Wayne Simpson timers Maynard Hill pilot George Pickrell Charlie Calvert CD Glen Scillian assistant CD Secrets success revealed test took literally years planning new FAI Dura tion World Record just over 20 hours powered RC models pilot estab lished last Septem ber lot problems solved keep model airthat long man set record describes prob lems trials errors eventual success unique flying machine planes may seem ugly facts boxes dont try move too fast Mother Nature puts some beautiful useful curves invisible air flowing near Inside boxes Well New Faithfuls internals also lessthan-elegant appearance Wires springs fuel tubes lacing cords shock-mounted para phernalia tangled end end scene included few splotches dried blood deposited evidence elbows propellers dont mix Any way look machine beautiful accurate adjective something admirable about way models guts frame muscles operated produce desired performance Twenty-five explosions per second shook machine like being hit tympanists mallet mezzo-forte Cranks turned valves slid bearings twirled gears whined sparks zapped springs twanged pushrods rocker arms beat tickety-tack rhythm against drone vibrating drum-tight skins cacaphony compounded whooshing propeller piccolo-like whistle air rushing tiny carburetor Indoors trillions electrons shoved alternator through maze diodes chips chokes connector plugs rainbow-colored harness wires move motors gears July 198279 Truss structures false ribs holey main ribs balsa box fuel tank visible shot Fuselage bottoms wing tips andstab covered wIth white opaque MonoKote remainder translucent orange scheme viewed best compromise visibility night during day Lights located teardrop-shaped lenses wing tip under stab Dark patches wing tips copper tape Staticmaster ionizers used part electrostatic wing leveller Flywheel magneto look like ugly bulges aerodynamic penalty small linkages Incandescent lights glowed wing tip atmospheric ions also being interrogated get reports bank angle happened comfortable womb laboratory out Mother Natures soggy foggy bumpy atmosphere very gratifing experience coax machine through two million thumps missed beat project hobby venture extraneous authors profession deals development remotely-piloted vehicles goal fly long time approach keep simple schedule whenever ready motivation fun Some aeromodeling techniques equipment employed may practical interest responsible developing long-duration drones unmanned vehicles UVs com munication relays decoys surveillance elec tronic countermeasures other uses idea model airplane technology might used reduce cost operational military systems very popular early 70s mixed reviews its merits have cropped up because some goals expectations went out bounds Perhaps article will bolster fundamentally sound idea would gratifying result However inside out side secrets New Faithful will exposed primarily help modelers also perhaps steer few fun breaking records Features New Faithful crate-like appear ance New Faithful consequence FAI rule limits Scale models gross takeoffweight 5 kg 1102 lb Aerobatic racing models seldom approach limit Duration models restriction means way increase fuel capacity decrease structural weight Engine displacement limited 10cc 061 cu lifting surface areawing tail restricted l5m sq 1615 sq ft neither rules influenced design wing sized fit inside Toyota Hatchback although largest per missible engine installed normally loafed 80 Model Aviation Left Charlie Calvert CD congratulates Maynard Hill Lots things have changed since similar picture made Frank Ehling Hill Old Faithful September1904 Planes look alike bellies larger important valuable changes have brought hobby AMA Only 18000 members got black-and-white pamphlet 1964 AMA close trouble now iargest sport aviation organization world Modified 05 FS6O used New Faithful mounted horizontally vibration dampening Reworked 05 10 throttle used Text explains lubrication wear problems magneto-flywheel spark ignition system Warningread text about flywheel shape Vibration testing done hanging model coat hangers foam pads elastic lines running ceiling back porch Hill FlyBy Night Aircraft Co Tail tied spring-loaded storm door door opening used approximate prop thrust Fuel frothing servowear other problems can detected method author recommends forchainsaw-powered models New Faithful wentthrough continuous 50-hour run prior its first test flight along 20% full power model size configuration could probably climb Out gross weight 11 lb loaded maximum fuel would have potential flight 200hr duration 6400-km 4000-mi range FAIs technical rules sensible promote safety provide common basis world-wide comparison generate some tough challenges rule permits pilot handle radio controls however would have repealed Duration records much beyond present made possible Editor FAIModel Committee ClAM has agreed provide pilot relief during such record attempts Subject approval overall FAI Sporting Com mittee will effective 1983 Development airplane matter putting some old principles together func tional way Reliability obtained fixing changing things failed during hours testing approach solving problems always seek simpler principle rather add complicated parts key functional components shown structural drawing engine modified 05 FS6O FS means four-stroke Fuel fed carburetor tank wing Fuel flow rate pressure steadied inter dicting float chamber Herein lies reason droop snoot Gravity dependable pumps modified bicycle alternator connected engine power takeoff through 21 step-up gear train Electric power alternator rectified dc filtered choked RF delivered aft under stabilizer RC receiver servos set small 100 mAh nickel-cadmium batteries located batteries provide safe landing case engine failure alternator powers control equipment three tiny lights needed wing tips tail night flying Also wing tips Staticmaster ionization units used electro static autopilot senses vector electric field exists atmosphere thereb4 Jrovides automatic leveling wings l telemetry transmitter hangs its dipole antenna station forward electrostatic stabilizer shown another vital unit Kraft transmitter flight tied automobile battery Thats put fuel tank spin prop life thing sustains itself least 20 hours airframe Balsa wood bridge-truss structures efficient easy build Streamlining boxes would add weight worth category competition Most airframe made ofcontest grade balsa coveringis Top Flites MonoKate fuselage outer wing panels stabilizer white opaque remainder translucent orange combination chosen best compromise daytime nighttime visibility bridge-truss spar wing front member protrudes way promotes early Onset turbulence boundary layer Usually airplane designers try keep boundary layers laminar over first half wing chord slow-flying models its easy induce laminar boundary layer persist too far flow can separate easily rear portion airfoil separation occursand probably will bumpy air en counteredthe result can drag force consid erably larger associated tripped turbulent boundary layer tends stay attached fuel tank does double duty center wing spar assembly 1/16 00 e 00 OCo tii~n 332 v0r 322 t8t5 23 212334 25 2357 5 10 1112150 O Propellor 16 dia tO pitch O Magneto & flywheel 05F560 engine modified @ 0S10 carbureto, modified Cam housing rea power take-off Filler made-from chemists filter paper O Float chamber Flearbie coupling rubber auto fuel hosel Two utep op gear train Fleoible coupling tygon tuhiegi Bicycle alternator @ Rectifier filter 6J Filters mesh iretal 3 200 mesh nylon er paper 062 Fuei tank sump also main center spar Telemetry transmitter j Incandescent bulbSO ma @SV red & greee lenses Stattcmaster 2y 500 ionizer Grounded guard strip copper tapel Auxiliary collector copper tapel @ Electrostatic autopilot Same 16 white lens @ Throttle serno Elevator rudder servos Kraft KP7F receiner @ Battery pack 1100 maHi NEW FAITHFUL cture componBnt layout sheets contest grade balsa coated internally epoxy resins impervious gasoline polyester resin covered externally fuel discussed later failures can result single layer fiberglass i/a oz/sq yd impreg- additions nitromethane propylene oxide ether nated same resin Most polyester Continued page 133 July 198281 Super Mini Boy Recommended Eigines Radios- Mufflers Helicopter tools stock Worlds stable easiest fly small 40 size R/O Helicopter Low maintenance mechanics engineer ed Dieter Schiuter Father RIO Helicopters Features fully collective Bell mixing main rotor head upright spinner starting straight shaft driven tail rotor & automatic compensation symmet rical prebuilt main rotor tail rotor blades autorotation clutch Uses standard 4 chanel radio Kits parts stock guarantee helicopters fly Ask man flies Move up Schiuter inSifrp U SEAN IflG subsidiary MINIATURE AIRCRAFT 2594 North Orange Blossom Trail ndo FL 32804 Phone 30514224531 test fuselages six flight fuselages high-altitude version Ranger V- 12 seriously delayed XP-77 use low-altitude engine its performance would inferior fighter airplane comparison existing models now production ac cording USAAF Technical Report #5359 Vidal Research took over job building wings made schedule slip Problems arose over matters basic time needed spread glue Completion first airplane delayed February 1944 Marcfr would make almost 1 years late wasnt until April Fools Day 1944 XP-77 flew Bells Niagra Falls NY factory Success last Far proto type arrived Wright Field May 2 soon revealed serious vibration 1700 rpm 2300 rpm probably due lack shock absorbers engine mounts June 6 1944 Allied troops storming Nor mandy beaches final assault Nazi-held Europe USAAF got around giving prototype XP-77 its serial number 43-34915 Official flight tests carried out Eglin Field FL second XP-77 43-34916 starting late July 1944 October 2 airplane fell out Immelmann turn inverted spin pilot recovered air plane went upright flat spin could recover forced jump pilot landed safely airplane demolished proved last straw project ended December 2 March 1945 war drawing close Army Air Forces completed report Flight Tests Bell XP-77 Airplane following has excerpted general handling characteristics XP-77 airplane satisfactory although restric tions evented dives spins violent maneuvers jectionable feature control system fixed trim tabs ailerons rudder results condition flight airplane will fly stick- rudder-free ground setting the. tabs Visibility good conditions flight ground handling Noise vibration cockpit considerable cockpit becomes very cold uncomfortable cold weather high altitude cockpit heat available high speed 328 mph obtained military power 3150 rpm 416 mani fold pressure 12600 ft critical altitude high speed 330 mph obtained war emergencypower 3300 rpm and57 at4000 ft critical altitude maximum rate climb obtained war emergency power 3630 feet per minute critical altitude 2000 ft ConclusionsThe overall performance XP-77 airplane inferior present fighter aircraft employed AAF results flight tests considerably lower estimated performance set Bell Aircraft Corp maximum speed airplane war emergency power considerably lower other AAF interceptor aircraft operating military power maximum rate climb military power very low interceptor air craft low service ceiling airplane renders useless against high altitude aircraft bad XP-77 fell 90 mph short its promised top speed rate climb no better 200-hp Pins Special aerobatic biplane service ceiling 30000 ft era P-38s would go 39000 ft P 51s would top 40000 ft interesting idea didnt work taught its creators lesson very very difficult build truly lightweight fighter plane General Dynamics learning lesson over again its F- 16 no longer lightweight Mach 2 ter course doesnt make sense give up such worthy goal As matter fact start Cassutt will close 250 mph 135-hp weighing little over 500 lb add couple machine guns some fuel radio two ours/Hill Continued page 80 other useful ingredients avoid building wing spar might dis solve its contents during flight samples balsa coated variety resins placed baby food jars containing candidate fuels array samples stored months backyard greenhouse exposure thermal cycling solvents brutal test Some combinations looked satisfactory dur ing winter turned messes July Sig Mfg Cos polyester finishing resin eventually chosen K&B finishing resin fared equally well test Scale modelers using chainsaw engines might find idea useful Its OK gasoline havent found resins will resist fuels containing nitromethane ether Engine modifications OS F560 engine received designed use glow plug ignition regular alcohol-based model fuel Gasoline far efficient alcohol glow plug ignition doesnt work well gasoline based fuels unless compression ratio increased point mechanical problems July 1982 133 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS 444444444* **4ATYOURFINoERTIPS4444MAYU* * Watch For**SHOWED ALLOY PARTS WITH* ***NO ORGANIZER AT OVER FIFTY* *Upcoming Ktsl**OOLLARS THAN TWICEOUR* *** 495* ****************44444444*444444* HSA735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST 2-56 3 16 SOCKET HEAD CAP SCREW 2-56 1 4 SOCKET HEAD CAP SCREW 3-56 I 2 SOCKET HEAD CAP SCREW 4-40 I 4 SOCKET HEAD CAP SCREW 4-40 1 2 SOCKET HEAD CAP SCREW 4-40 34 SOCKET HEAD CAP SCREW 4-40 1 SOCKET HEAD CAP SCREW 6-32 1 4 SOCKET HEAD CAP SCREW 6-32 I 2 SOCKET HEAD CAP SCREW 6-32 34 SOCKET HEAD CAP SCREW 6-32 1 SOCKET HEAD CAP SCREW 6-32 l SOCKET HEAD CAP SCREW 6-32 2 SOCKET HEAD CAP SCREW FLAT WASHERS SAE ZINC PLATED 2 4 iii~ PCS 25 25 25 20 20 20 20 IS 15 IS 15 15 15 75 50 75 90 TOTAL PCS 735 5 NYLON INSERT LOCK NUTS ZINC PLATED 2-56 4-40 6-32 * * * **** ********************* KITS COME COMPLETE WITH 18 COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER ONLY $2495 NEW THE POWRWIr%IC4ANDTHE RETRIEVER POW RWINCH perfect casanion * $27500 RErRThVER Both units use special plus shipping 4pole permanent magnet lc* current drain less battery 12 volt nortor design also inCnrpor ates lighteeight heavy duty welded arKi painted steel frane features adjustable nvtor sounting plate insure proper drive tension PCM R b mater unlimited ttnnaters WINaS has handle either ,u anythirsg between rid pro tected font switch operation ed towline druis a-sstruction required anti-kiting braking can readily disengaged e Manual drun brake retrieval takeup antrol 2000 feet braided nylon line tCs riixn ball-beering swivel bearing turnaround hub RETR EVER will eliminate losing turn frequency because long turnaround tines retrieving lines Line orossings due wind shifts using multiple winches will longer probl40n Best 11 have launch-a-minute capability Other features incltxle e Drag-free operation due flycasting imde Battery cables heavy duty clips feet braided nylon line ball bearing swivel Guide line aligrinent takeup nEsie nd prevent line tangling drive shaft WRITE FOR MORE I14FO1L&flON 4DAVEY $22500SYSTEMS plusmFinE CORPORATION shippingONE WOOD LANEMALVERNPA19355 * INTRODUCTORY PRICE 1982 134 Model Aviation severe Furthermore fuel-air mixtures become extremely critical Sensitive temperature humidity changes toyed enough Such ideas reach conclusion spark ignition its heavy coils radio interference problems bound better method So magneto coil flywheel grass trimmer engine Lawn Boy part #06823-07 -08 mounted front housing flywheel originally round cut dumbbell shape reduce weight Warning Dont try dodge engine turns up usual 9000 rpm dumb bell will fly apart prove have paint can hole waste basket large bulge sand annulus between containers Some sand flew out top flywheel broke Taking fatigue account wouldnt trust thing above 5000 rpm Top speed engine 16 x 10 hand-carved propeller around 4500 rpm coil called solid-state magneto spark discharge triggered same magnetic flux energizes coil inner secrets device seem proprietary two important observations can made knowing exactly works 1 no points wear Out 2 generates milder form radio-frequency noise either point systems capacitance discharge systems RF noise can effectively suppressed putting 10K resistor series plug putting shield over high-tension lead Until about 1979 engines being massproduced hobby use two-stroke type until flight 1981 World Records Power categories estab lished such engines Although experi mented earlier homemade four-stroke engines have better fuel efficiency perfecting engine Duration takes lots spare parts no serious effort made use such design until OS FS6O appeared engine remarkably well built have run 400 hours bearings piston fit compression practically good new Some problems however showed up valve/rocker-arm/cam system partly because very little lubricant being used effort attain high fuel efficiency Valve clearances reset three hours after 24 hours pushrods too short permit further adjustment problem partially fixed weakening shortening valve springs replacing pushrods pieces Allen hexwrench material 5/64 across flats tips pushrods tips cam follower pins hardened heating microtorch about 16000F near orange glow quenchingwith water No annealing tempering done after quench Next valve-drive cam started wear problem mitigated adding oil fuel drilling small breather hole crank case aft cam Oil thereby blown through cam housing splattering oil made new black mess inside models nose now valve system good 50 hours between adjustments next problem Carbon build-up valves spark plug choked engine stop about 10 hours unless baby-sat gradually backed out needle valve reached old bag tricks polyisobutylene chemical used manufacture synthetic rubber viscous liquid does pretty good job lubricating metals instead producing carbon particles cracks mostly combustible hydrocarbon molecules heated Presto Very little carbon formed fuel efficiency increased composition fuel 93% premium grade Mail YOUr Order To* Please Include $250 postage HARDWARE SYSTEMS handling 42a WushingRon Ave S.* Add $150 COD Eden Prairie Mm. 55344* Minn realdenta add 5% sales tax * Orders will shipped within 48 Phone *129418757hours INDIAN CITY RADIO CONTROL CLUB Presents DETROIT EXPO IV Greater Michigan Modelers Show PLANES BOATS 0 CARS MANUFACTURERS STATIC DISPLAYS0 SWAP-SHOP October 123 1982 Eight Mile Artillery Armory Oak Park Michigan Info 6909 Monroe Blvd Taylor MI 48180 U U U I I I like world-taits actual-Sullivan Insta-Just Plstk Conoar Starter. ine Handles feel good tn serve Hook hand can adjus*t quick Dattery itll 38$ IJ-2 especially suiia$e inftaine Incredible ill fit sizes Grab hold starter can shake huNts 5suppliesup ds enginesand unleaded gasoline 7% polyisobutylene tedious work dealt carbure tor standard RC-type needle valve could have installed would have defied simpli city rule Besides hearing poor US FS6O very quiet engine Instead built-in means keeping fuel-air ratio constant throughout power range sought car buretor 15cc OS 10 engine adapted inlet manifold mercury ma nometer attached monitor inlet-manifold pressure fuel fed engine via float chamber 50cc graduated burette needle valve first adjusted lean smooth running full throttle periodic readings rpm manifold pressure fuel level burette number proportional fuel-air ratio calculated Additional sets data recorded lower throttle settings fuel-air ratio never came out constant stock carburetor Usually mixture became very rith low power peculiarly-shaped notch carburetor barrel needed notch shape found grinding little testing fuel-air ratio over whole rpm range grinding little testing again etc etc got right third carburetor fifth weekend during long procedure got absent-minded forgot propeller revving front Ouch Shake shake shake Eventually continuous hands-oft run 50 hours duration made run engine mounted aircraft suspended elastic lines allow entire flight-ready assembly vibrate airborne often hears builder new airplane exclaim flew right off drawing board effusion signifies bad consisted Kraft 533 FM receiver Ace Bantam Midget servos placed far aft reduce chances ignition noise would Continued page 142 July 1982 135 IL GRAB HOLD ly iii th Sri I I I I I I I I I I practice really ought hang up new model shake about 15 minutes per pound before trying fly Controls fuselage radio equipment V -NW yone Sec after 100 pm September 22 touchdown Open apace available landing model chose sit down cook tent PAl rules require landing within 500 meters launch point spot within 10 meters although embarrassing acceptable No damage iota fuel left tank wuniversai type ror encauseg cowls Thrse tail tubes suit engine position Seiect tail pipe remove others desired 0 Small Compact easy attach Tsil pipe extension Included AII mounting hardware clamps screws included THREE SIZES EM-I -19 . 1195 EM-2 -40.. 1295 EM-345.80. 1430 leading dealers available ORDER DIRECT Add 10% postage handling Calif residents add 6% tsi Check Cod accepted_Supply card number date ViSi_or MASTER CARD manifold fit scale model cowls TWo exhaust tubes allow maximum sxhaust removal less heating PITTS STYLE MUFFLERS OFor scale aircraft such PiflS CESSNA 150 Angied exhaust tubee exit bottom cowling OWorm drive mounting strap OTait pipe extensions -. mounting hardwan -1 cause jitter excessive current drain servos As turned out precaution really necessary because very effective shielding eventually installed nickel-cadmium batteries special Hi-Rate type obtained Ace Radio Control can withstand severe over charging no need voltage regulator telemetering unit sensed current flowing out batteries monotonous musical note ground-based receiver gave pleasant assurance well board Servo motions could detected superimposed buzz since charging cur rent changed engine rpm pitch tone indicated engine speed Interference glitching due weak signals could also detected presence scratchy noise ominous sound wasnt heard during record flight polyhedral wing minimizes spiral instability basic model fuel shifting side wing other during uncoordinated turns generates quite load rudder work pilot So electrostatic stabilizer78910 used automatic wing leveling total weight system 1 oz equal hours worth fuel good trade Devices type can also used stabilize pitch attitude feature omitted instance Instead long tail large stabilizer used simple expedient provided substantial margin inher ent pitch stability precluded potential troubles related servo wear extra current drain active pitch stabilization loop Practice practice practice trials work air bugs out system com ponents installed model made relics left over 1960s record attempts flights during dusk dawn periods airplane cannot seen very well neither dark enough see small red green white navigation lights electrostatic stabilizer found big help during periods well during night visual determina tion attitude airplane based solely orientation three tiny candescent bulbs planned flight altitude about 1500 ft above ground 2000 ft above sea level array closely spaced color contrast strongly discernible staring star-like wanderers amongst Orion other rocks heavens hypnotic effect mesmerized keyed-up senses limit three four hours However FAI rule states no assistant pilots allowed use control transmitter electrostatic stabilizer served very effectively towards over coming roadblock Instead having pay attention compensate spiral instability able close eyes relax chaise lounge momentarily pulse control stick hard over response verbal commands observers could staring relays So cat skinned pretested equipment transferred new airframe July 4 baptismal flight mid-August assembly tortured 75 hours ground 25 hours air confidence machine very high remaining task flying 20 hours official witnesses would call some truly dedicated people Exciting boredom what John Worth called during previous 1964 record flight Care taken pick helpers officials qualities included patience stam ina sense humor Weather loomed last barrier model strong enough withstand fairly severe turbu lence avoid unpredictable thunderstorms keep pilots work acceptable level seemed wise wait calm characteristic equinoctial highs convectively stable masses hot air frequently stagnate area during last half September Synoptic weather information sources watched signs usually precede favorable conditions September 12 1 3 great crew officials off Bealeton VA running DCRCs annual Scale competition Wouldnt know year series rapidly-moving cold fronts followed September 20 crew gathered under drizzling clouds went through test run official weighing launching timing procedures next afternoon occluded front stretched east-west Kansas City Philadelphia rain 100 miles north field decided see far could get though 15-mph wind southeast partial overcast gray strato cumulus clouds Usually such conditions get worse before get better Rain high winds expected unless front changed its direction record flight launch went off planned 5 pm sundown 730 pm clouds cleared wind dead calm ground obviously flow 1500 ft model sat nearly stationary its airspeed matching wind must have near 20 mph southeast 830 pm observer method working well clear star-laden sky Two artificial satellites seen about time boredom relieved philosophical 142 Model Aviation I I Plasticote Propeller OR LARGE new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER LIGHTER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 discussions inspired sightings couple old Sputnik jokes came out woodwork too like Hey did hear Russians put 10 cows orbit say its herd shot round world midnight observers practiced giving yaw pitch trim commands competing see could hold new constellation stationary longest period long times could mistaken star got little sleepy missed few commands stir attention George Pickrell jumped up onto box bellowed Holy cats three guys coming over hill camels Theres nothing like healthy guffaw keep party alive About 2 am heavy ground fog formed stayed through night never grew thicker about 75 ft Sideways visibility 50 ft would have no way accom plish safe landing engine failed Vertically navigation lights stars could seen through cone-shaped hole 5 am wind aloft shifted west Hooray front moving away visibility cone however diminished about 200 included angle Ground equipment crew blankets soaked dew tension building because never flown through very foggy dawn six pairs eyes two pairs field glasses made 9 am thermal convection winds about 10 mph ground level causing model bounce nighttime observer procedure abandoned 1030 husky bumps causing excessive currents electrostatic stabilizer system aid shut down 1 pm 3V3 hours past prior record airplane performing admirably telemetry saying everthings fine grumpy over one-pilot rule otherwise felt OK landing 500 meters launch would scrub record claim decided wed done enough pushed engine shutdown button gust blew airplane onto collision couse wifes shiny new Honda during final approach interest continued harmony no choice except pull up over car model ignominously impaled corner pole cook tent 10 meters launch point home nonetheless valid claim record Inferred results implications gross takeoff weight model 498kg 1096 lbs 173kg 61 oz fuel model landed little half 089kg3 oz fuel still tank Thus model has theoretical capability flight excess 40 hours models gas mileage figure 1500 mpg its estimated FAI legal range wind nearly 1000 miles fuel consumption rate 42 gm/hr 15 oz/hr impressively low no miraculous engine efficiency involved performance As evidence consider following points model flown about 25 mph through flight probably has liftto-drag ratio about 10 speed Assuming propeller efficiency about 05 specific fuel consumption can calculated about 103 lb/hp-hr rae about 10 times smaller what goes nto two-cycle engines alcohol still nearly twice some larger four-cycle engines used manned air craft Further improvements engine therefore theoretically possible would easily achieved small size Continued page 146 Its incredible heres true Epoxy Paint thats Pre-mixed 000 can! 0@ RITES BLACK AARON PueIPrc42 pa Tnt No pot life ixing proof Lightweight r tough a Flexible C@/ERITE 420 BABYLON ROAD/HORSHAM PA 19044 Model Ii S th I10 5O1 4O IJ Local Dealer Send $1 00 Catalog Juiy 1982 143 System Hi-Starts 101 Ceeaplet Nt-Seen Kit Mie AeceenEly 14 Pound Pull tOO Feet Sleet Surgical Late Continuous Piece Section Reel Line Chute Stoke Tow Rings Hardware elig240o 102 Coenplcee 2-Mete Hi-Stan Kit 5 Pound Pill hO Feet 1 4 inch Slack Late Reel Line Chute Stake HardwCrC Etc $1700 103 Splaoetet Tobeg Opees Cl. Type tOO Feet Slack Surgical Late. 14 lb Pull $1800 104 Seplaoeerel Tebing 2-Megee S lb Poll S 500 10$ Nylee Hi-Stan UeeTwitted S 326 55 lb Test White ColorStaided g42S 106 Steedeed Pereehot Sd Celee Tow SinS5 325 105 Reel SiC Poe Hi-Stan Oteok Wied-UpLarge $ BOO CeterpletO Teogh Pleohe HdweeSmall 5 450 System II Winch 111 Pro-Lasech Coerteat WieOtt Mb ho Keen Edge State 01 art comelernlc ready-to-use less hatternI 12 oclt nonahie winch ncudecwheelc handle motor tuct twIn h reel ritnarcund oIl electrical wiring lice chute Hock-nc hatterc end ccii readn Ic fly S2$$00 112 Pre-tasech Wktch Preen. Seal Tureeroced includes drilled Iroere reel turnarnundS cairo $15000 107 Winch Cleat 18 led Ojeeseter 230 lb Teet Heauc DuIn Tow Sing Connecting Ring $825 105 Wiech Line 2000 Cl Scaided Nylee $3 lbTeet$1500 Choice ci Pill Test White Colot 1 tS lb Test $2000 Top Ouclito Acailable Soacral 153 lb Test $2600 Orders Othet Listed 180 lb Test $3200 System III Power Pod 110 Powee Pod desigeed Ed Ceontghtl Icr 2-mole sci Iclaces lihergiacs huill- ecira tank allowS tO mint- engine run fur use OdS metal lank engines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 P011 IN 47454 ELECTRONIC SERVICENTER FACTORY AUTHORIZED WARRANTY SERVICE FOR KRAFT over 35 other manufacturers Cleaning adjustment nsmitter receiver up 4 servos $2500 plus parts 24 HOUR SERVICE74 ZOUR SERVICE NEAL WARREN ~c13 South 21st Street Sp Philadelphia PA 19103 Tel 215 564-0800 Mon-Fri 9AM-53OPM Wed night till 8PM Sat 9AM Noon KIT S 9 Hi GLIDERS 3 SATELLITE KITS 17 OLD TIME GAS Send 25 for5 RUBBER 3 NORDICfine instruments 1980 catalog9 COMPETITION GASsmall craft & aircraft design FUEL DT TIMERS -$1075 eachOur comprehensive catalog return F Al Model SupplyBox 1534 Southold NY Ei P0 BOX 3957TORRANCE CA 90510inc 11971 516 765196Oar interesting Speculate what kind per formances might obtained all-out legal FAT model Suppose example spindly toothpicky monster model utmost structural efficiency made instead fairly robust Also assume use carbon fibers Kevlar titanium samarium cobalt magnets lith ium batteries solar cells tough microfilm coverings Further make tandem wing maximum allowable arear course install lightweight electrostatic pitch stabilizer allow equal loading both surfaces Work improving specific fuel consumption fly still slower speed long might fly Two hundred hours seems possible far Capa bility non-stop San Francisco Boston flight would reasonable expectation matter would New York Paris flight would some very difficult logistics problems associated such attempts have absolutely no interest trying prove can stay awake longer somebody elseso Itm inclined try something easier like tuming electrostatically- stabilized machines loose upper end Grand Canyon terrain avoidance features stabilizer would automatically steer machine down valley70 Wetd launch Moab UTr hop jet HooverDam sit inabartellingflyingstories waiting machine arrive day later Another dream another time Acknowledgements officials observers provided valuable help encouragement during record flight also during preparatory test flights am very grateful patience humor hard work contributed Mr Charles Calvert Contest Director Mr Wayne Simpsonr Mr Jack Anglin timers Mssrs Michael DeMuth George Pickrell Glen Scillian official observers pilOtrs assistants Helpful advice about lubrication problems obtained Mr Don Lindley Amoco Research Laboratories Mr Ray Cramer provided useful consultations aerodynamics Valuable technical assistance contributed members District Columbia Radio Control Club DCRC particular Mr Ben Givens worked telemetry devices Messrs Melvin Newcomer William Charbonneau Robert Lee assisted design fabri cation electrostatic stabilizer other electronic units Mr Paul Nash granted use runways gliderport Brookeville MD facility valuable asset project Mrs Lillian Goldfinger Johns Hopkins Uni versity Applied Physics LabAPL made useful suggestions patiently typed badly scribbled drafts Dr Gordon Dugger APL edited improved original manuscript effot greatly appreciated References I Hill ML. Beat RuSsians Bust Model Airplane News Vol 72 No Feb 1965 p 28 2 Hill ML. 27000 Feet Its Catbird Country Fisning Models #406 Jan 1971 p 18 3 Hill ML. Shuffle Off Buffalo Model Air plane News Vol 73 No 2 Feb 1966 p 30 4 Hill ML. II l Hours Exciting Boredom Firing Models #390 Sept 1969 p 6 5 Hill M L Tonoise World Speed Record Model Elsing Models *359 Jan 1967 p 20 6 Hill ML. Bong Boomer World Record Soaring Glider Fisring Models #360 Feb 1967 p 9 7 Hill ML. Introducing Electrostatic Autopilots Astronautics Aeronautics Vol 10 No 1 Nov 1972 pp 22-31 8 Hill ML. Electrostatic Autopilot RC MOdelsrr Flying Models #431 Feb 1973 p 20 9 Hill ML. Design Performance Electro statically Stabilized Delta Planform Mini RPVs Con ference Proceedings Milirarsr Electronics Defense Ex position Wiesbaden Germany Oct 977 Injeravia SA Geneva Switzerland pp 847-861 10 Hill ML. Whyte TR. Weiss RO. Rubio R Isquierdo M.Use Atmospheric Electric Fields Vertical Stabilization Terrain Avoidancerr Pro ceedings ofAJAA Guidance & Control Conf Albu querque NM. August 19-21 1981 ATAA Paper *81-I 848-CP AMA Building/Mankowski Continued page 45 New Chaiter Members AMA Builders plaques recognizing $500 contributions Ilsis lnonth Free Flight Model Airplanc Association Southern California Northern Virginia Radio Control Inc Detroit Aero Modeler RCr tner Robert Reder Walter Hartung Contributing Members Honor Roll listing donations $100 up now included Sooner Circle Burners Kennebec Valley Mod el Avialors Twin City Radio Controllers Inc l-lightmasters Klamath Falls Cincin nati Aero Modelers San Gabriel Valley RC League WINGSr Tidewater RC Club Ever green Radio Modelers Association Monmouth Model Airplane Club Skylarks Sharon McDonnell-Douglas RC Club Memphis Prop Rusters Niagra County RC Club Sacramento RC Club Reno Radio Control Club Greater Cincinnati RC Arvada Associated Modelers Goodyear Model Aircraft Club Niagara Sun day l1rers Inc Pomona Valley Model Air plane ClObr Riverside RC Club again Alfred Twyla Lchmberg Robert Krafft Carl Otto Margaret Walinski John Williams John Grigg Ed Louise 146 Model Aviation PRC LRUflCH SYSTEMS Rugged Simplicity Top Performance Reasonable Price Oreect 5alee/ Ida MiddleMen/Hi-5taetoAle KitFoemftd Minute Aasewblv 7 Coerplete looteuctruce Included No special 71010 Regoreed / Seod SANE Fun Funhen lirfeematron Ordee List peodoots Total / Add S200 Skipping gend Menen aede Cheeb CreditCord Notetbet end Eep Data/COO Add 5150/ Aleska Add 5350 / Hawaii Will COO Shipping Mail ot Phone I Wiech OtiterePegeteet Adneeco Will COO Phone Orders Waloerne / Mail Order Phone Orders nS/ Welcome
Edition: Model Aviation - 1982/07
Page Numbers: 78, 79, 80, 81, 133, 134, 135, 142, 143, 146
NO OCR TEXT Victory brings out smiles faces tired crew after 20-hr flight near Brookeville MD September 21-22 1 gai DCRC members worked hard during preparatory flights well official attempt Left right Mike DeMuth pilots assistant Jack Anglin Wayne Simpson timers Maynard Hill pilot George Pickrell Charlie Calvert CD Glen Scillian assistant CD Secrets success revealed test took literally years planning new FAI Dura tion World Record just over 20 hours powered RC models pilot estab lished last Septem ber lot problems solved keep model airthat long man set record describes prob lems trials errors eventual success unique flying machine planes may seem ugly facts boxes dont try move too fast Mother Nature puts some beautiful useful curves invisible air flowing near Inside boxes Well New Faithfuls internals also lessthan-elegant appearance Wires springs fuel tubes lacing cords shock-mounted para phernalia tangled end end scene included few splotches dried blood deposited evidence elbows propellers dont mix Any way look machine beautiful accurate adjective something admirable about way models guts frame muscles operated produce desired performance Twenty-five explosions per second shook machine like being hit tympanists mallet mezzo-forte Cranks turned valves slid bearings twirled gears whined sparks zapped springs twanged pushrods rocker arms beat tickety-tack rhythm against drone vibrating drum-tight skins cacaphony compounded whooshing propeller piccolo-like whistle air rushing tiny carburetor Indoors trillions electrons shoved alternator through maze diodes chips chokes connector plugs rainbow-colored harness wires move motors gears July 198279 Truss structures false ribs holey main ribs balsa box fuel tank visible shot Fuselage bottoms wing tips andstab covered wIth white opaque MonoKote remainder translucent orange scheme viewed best compromise visibility night during day Lights located teardrop-shaped lenses wing tip under stab Dark patches wing tips copper tape Staticmaster ionizers used part electrostatic wing leveller Flywheel magneto look like ugly bulges aerodynamic penalty small linkages Incandescent lights glowed wing tip atmospheric ions also being interrogated get reports bank angle happened comfortable womb laboratory out Mother Natures soggy foggy bumpy atmosphere very gratifing experience coax machine through two million thumps missed beat project hobby venture extraneous authors profession deals development remotely-piloted vehicles goal fly long time approach keep simple schedule whenever ready motivation fun Some aeromodeling techniques equipment employed may practical interest responsible developing long-duration drones unmanned vehicles UVs com munication relays decoys surveillance elec tronic countermeasures other uses idea model airplane technology might used reduce cost operational military systems very popular early 70s mixed reviews its merits have cropped up because some goals expectations went out bounds Perhaps article will bolster fundamentally sound idea would gratifying result However inside out side secrets New Faithful will exposed primarily help modelers also perhaps steer few fun breaking records Features New Faithful crate-like appear ance New Faithful consequence FAI rule limits Scale models gross takeoffweight 5 kg 1102 lb Aerobatic racing models seldom approach limit Duration models restriction means way increase fuel capacity decrease structural weight Engine displacement limited 10cc 061 cu lifting surface areawing tail restricted l5m sq 1615 sq ft neither rules influenced design wing sized fit inside Toyota Hatchback although largest per missible engine installed normally loafed 80 Model Aviation Left Charlie Calvert CD congratulates Maynard Hill Lots things have changed since similar picture made Frank Ehling Hill Old Faithful September1904 Planes look alike bellies larger important valuable changes have brought hobby AMA Only 18000 members got black-and-white pamphlet 1964 AMA close trouble now iargest sport aviation organization world Modified 05 FS6O used New Faithful mounted horizontally vibration dampening Reworked 05 10 throttle used Text explains lubrication wear problems magneto-flywheel spark ignition system Warningread text about flywheel shape Vibration testing done hanging model coat hangers foam pads elastic lines running ceiling back porch Hill FlyBy Night Aircraft Co Tail tied spring-loaded storm door door opening used approximate prop thrust Fuel frothing servowear other problems can detected method author recommends forchainsaw-powered models New Faithful wentthrough continuous 50-hour run prior its first test flight along 20% full power model size configuration could probably climb Out gross weight 11 lb loaded maximum fuel would have potential flight 200hr duration 6400-km 4000-mi range FAIs technical rules sensible promote safety provide common basis world-wide comparison generate some tough challenges rule permits pilot handle radio controls however would have repealed Duration records much beyond present made possible Editor FAIModel Committee ClAM has agreed provide pilot relief during such record attempts Subject approval overall FAI Sporting Com mittee will effective 1983 Development airplane matter putting some old principles together func tional way Reliability obtained fixing changing things failed during hours testing approach solving problems always seek simpler principle rather add complicated parts key functional components shown structural drawing engine modified 05 FS6O FS means four-stroke Fuel fed carburetor tank wing Fuel flow rate pressure steadied inter dicting float chamber Herein lies reason droop snoot Gravity dependable pumps modified bicycle alternator connected engine power takeoff through 21 step-up gear train Electric power alternator rectified dc filtered choked RF delivered aft under stabilizer RC receiver servos set small 100 mAh nickel-cadmium batteries located batteries provide safe landing case engine failure alternator powers control equipment three tiny lights needed wing tips tail night flying Also wing tips Staticmaster ionization units used electro static autopilot senses vector electric field exists atmosphere thereb4 Jrovides automatic leveling wings l telemetry transmitter hangs its dipole antenna station forward electrostatic stabilizer shown another vital unit Kraft transmitter flight tied automobile battery Thats put fuel tank spin prop life thing sustains itself least 20 hours airframe Balsa wood bridge-truss structures efficient easy build Streamlining boxes would add weight worth category competition Most airframe made ofcontest grade balsa coveringis Top Flites MonoKate fuselage outer wing panels stabilizer white opaque remainder translucent orange combination chosen best compromise daytime nighttime visibility bridge-truss spar wing front member protrudes way promotes early Onset turbulence boundary layer Usually airplane designers try keep boundary layers laminar over first half wing chord slow-flying models its easy induce laminar boundary layer persist too far flow can separate easily rear portion airfoil separation occursand probably will bumpy air en counteredthe result can drag force consid erably larger associated tripped turbulent boundary layer tends stay attached fuel tank does double duty center wing spar assembly 1/16 00 e 00 OCo tii~n 332 v0r 322 t8t5 23 212334 25 2357 5 10 1112150 O Propellor 16 dia tO pitch O Magneto & flywheel 05F560 engine modified @ 0S10 carbureto, modified Cam housing rea power take-off Filler made-from chemists filter paper O Float chamber Flearbie coupling rubber auto fuel hosel Two utep op gear train Fleoible coupling tygon tuhiegi Bicycle alternator @ Rectifier filter 6J Filters mesh iretal 3 200 mesh nylon er paper 062 Fuei tank sump also main center spar Telemetry transmitter j Incandescent bulbSO ma @SV red & greee lenses Stattcmaster 2y 500 ionizer Grounded guard strip copper tapel Auxiliary collector copper tapel @ Electrostatic autopilot Same 16 white lens @ Throttle serno Elevator rudder servos Kraft KP7F receiner @ Battery pack 1100 maHi NEW FAITHFUL cture componBnt layout sheets contest grade balsa coated internally epoxy resins impervious gasoline polyester resin covered externally fuel discussed later failures can result single layer fiberglass i/a oz/sq yd impreg- additions nitromethane propylene oxide ether nated same resin Most polyester Continued page 133 July 198281 Super Mini Boy Recommended Eigines Radios- Mufflers Helicopter tools stock Worlds stable easiest fly small 40 size R/O Helicopter Low maintenance mechanics engineer ed Dieter Schiuter Father RIO Helicopters Features fully collective Bell mixing main rotor head upright spinner starting straight shaft driven tail rotor & automatic compensation symmet rical prebuilt main rotor tail rotor blades autorotation clutch Uses standard 4 chanel radio Kits parts stock guarantee helicopters fly Ask man flies Move up Schiuter inSifrp U SEAN IflG subsidiary MINIATURE AIRCRAFT 2594 North Orange Blossom Trail ndo FL 32804 Phone 30514224531 test fuselages six flight fuselages high-altitude version Ranger V- 12 seriously delayed XP-77 use low-altitude engine its performance would inferior fighter airplane comparison existing models now production ac cording USAAF Technical Report #5359 Vidal Research took over job building wings made schedule slip Problems arose over matters basic time needed spread glue Completion first airplane delayed February 1944 Marcfr would make almost 1 years late wasnt until April Fools Day 1944 XP-77 flew Bells Niagra Falls NY factory Success last Far proto type arrived Wright Field May 2 soon revealed serious vibration 1700 rpm 2300 rpm probably due lack shock absorbers engine mounts June 6 1944 Allied troops storming Nor mandy beaches final assault Nazi-held Europe USAAF got around giving prototype XP-77 its serial number 43-34915 Official flight tests carried out Eglin Field FL second XP-77 43-34916 starting late July 1944 October 2 airplane fell out Immelmann turn inverted spin pilot recovered air plane went upright flat spin could recover forced jump pilot landed safely airplane demolished proved last straw project ended December 2 March 1945 war drawing close Army Air Forces completed report Flight Tests Bell XP-77 Airplane following has excerpted general handling characteristics XP-77 airplane satisfactory although restric tions evented dives spins violent maneuvers jectionable feature control system fixed trim tabs ailerons rudder results condition flight airplane will fly stick- rudder-free ground setting the. tabs Visibility good conditions flight ground handling Noise vibration cockpit considerable cockpit becomes very cold uncomfortable cold weather high altitude cockpit heat available high speed 328 mph obtained military power 3150 rpm 416 mani fold pressure 12600 ft critical altitude high speed 330 mph obtained war emergencypower 3300 rpm and57 at4000 ft critical altitude maximum rate climb obtained war emergency power 3630 feet per minute critical altitude 2000 ft ConclusionsThe overall performance XP-77 airplane inferior present fighter aircraft employed AAF results flight tests considerably lower estimated performance set Bell Aircraft Corp maximum speed airplane war emergency power considerably lower other AAF interceptor aircraft operating military power maximum rate climb military power very low interceptor air craft low service ceiling airplane renders useless against high altitude aircraft bad XP-77 fell 90 mph short its promised top speed rate climb no better 200-hp Pins Special aerobatic biplane service ceiling 30000 ft era P-38s would go 39000 ft P 51s would top 40000 ft interesting idea didnt work taught its creators lesson very very difficult build truly lightweight fighter plane General Dynamics learning lesson over again its F- 16 no longer lightweight Mach 2 ter course doesnt make sense give up such worthy goal As matter fact start Cassutt will close 250 mph 135-hp weighing little over 500 lb add couple machine guns some fuel radio two ours/Hill Continued page 80 other useful ingredients avoid building wing spar might dis solve its contents during flight samples balsa coated variety resins placed baby food jars containing candidate fuels array samples stored months backyard greenhouse exposure thermal cycling solvents brutal test Some combinations looked satisfactory dur ing winter turned messes July Sig Mfg Cos polyester finishing resin eventually chosen K&B finishing resin fared equally well test Scale modelers using chainsaw engines might find idea useful Its OK gasoline havent found resins will resist fuels containing nitromethane ether Engine modifications OS F560 engine received designed use glow plug ignition regular alcohol-based model fuel Gasoline far efficient alcohol glow plug ignition doesnt work well gasoline based fuels unless compression ratio increased point mechanical problems July 1982 133 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS 444444444* **4ATYOURFINoERTIPS4444MAYU* * Watch For**SHOWED ALLOY PARTS WITH* ***NO ORGANIZER AT OVER FIFTY* *Upcoming Ktsl**OOLLARS THAN TWICEOUR* *** 495* ****************44444444*444444* HSA735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST 2-56 3 16 SOCKET HEAD CAP SCREW 2-56 1 4 SOCKET HEAD CAP SCREW 3-56 I 2 SOCKET HEAD CAP SCREW 4-40 I 4 SOCKET HEAD CAP SCREW 4-40 1 2 SOCKET HEAD CAP SCREW 4-40 34 SOCKET HEAD CAP SCREW 4-40 1 SOCKET HEAD CAP SCREW 6-32 1 4 SOCKET HEAD CAP SCREW 6-32 I 2 SOCKET HEAD CAP SCREW 6-32 34 SOCKET HEAD CAP SCREW 6-32 1 SOCKET HEAD CAP SCREW 6-32 l SOCKET HEAD CAP SCREW 6-32 2 SOCKET HEAD CAP SCREW FLAT WASHERS SAE ZINC PLATED 2 4 iii~ PCS 25 25 25 20 20 20 20 IS 15 IS 15 15 15 75 50 75 90 TOTAL PCS 735 5 NYLON INSERT LOCK NUTS ZINC PLATED 2-56 4-40 6-32 * * * **** ********************* KITS COME COMPLETE WITH 18 COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER ONLY $2495 NEW THE POWRWIr%IC4ANDTHE RETRIEVER POW RWINCH perfect casanion * $27500 RErRThVER Both units use special plus shipping 4pole permanent magnet lc* current drain less battery 12 volt nortor design also inCnrpor ates lighteeight heavy duty welded arKi painted steel frane features adjustable nvtor sounting plate insure proper drive tension PCM R b mater unlimited ttnnaters WINaS has handle either ,u anythirsg between rid pro tected font switch operation ed towline druis a-sstruction required anti-kiting braking can readily disengaged e Manual drun brake retrieval takeup antrol 2000 feet braided nylon line tCs riixn ball-beering swivel bearing turnaround hub RETR EVER will eliminate losing turn frequency because long turnaround tines retrieving lines Line orossings due wind shifts using multiple winches will longer probl40n Best 11 have launch-a-minute capability Other features incltxle e Drag-free operation due flycasting imde Battery cables heavy duty clips feet braided nylon line ball bearing swivel Guide line aligrinent takeup nEsie nd prevent line tangling drive shaft WRITE FOR MORE I14FO1L&flON 4DAVEY $22500SYSTEMS plusmFinE CORPORATION shippingONE WOOD LANEMALVERNPA19355 * INTRODUCTORY PRICE 1982 134 Model Aviation severe Furthermore fuel-air mixtures become extremely critical Sensitive temperature humidity changes toyed enough Such ideas reach conclusion spark ignition its heavy coils radio interference problems bound better method So magneto coil flywheel grass trimmer engine Lawn Boy part #06823-07 -08 mounted front housing flywheel originally round cut dumbbell shape reduce weight Warning Dont try dodge engine turns up usual 9000 rpm dumb bell will fly apart prove have paint can hole waste basket large bulge sand annulus between containers Some sand flew out top flywheel broke Taking fatigue account wouldnt trust thing above 5000 rpm Top speed engine 16 x 10 hand-carved propeller around 4500 rpm coil called solid-state magneto spark discharge triggered same magnetic flux energizes coil inner secrets device seem proprietary two important observations can made knowing exactly works 1 no points wear Out 2 generates milder form radio-frequency noise either point systems capacitance discharge systems RF noise can effectively suppressed putting 10K resistor series plug putting shield over high-tension lead Until about 1979 engines being massproduced hobby use two-stroke type until flight 1981 World Records Power categories estab lished such engines Although experi mented earlier homemade four-stroke engines have better fuel efficiency perfecting engine Duration takes lots spare parts no serious effort made use such design until OS FS6O appeared engine remarkably well built have run 400 hours bearings piston fit compression practically good new Some problems however showed up valve/rocker-arm/cam system partly because very little lubricant being used effort attain high fuel efficiency Valve clearances reset three hours after 24 hours pushrods too short permit further adjustment problem partially fixed weakening shortening valve springs replacing pushrods pieces Allen hexwrench material 5/64 across flats tips pushrods tips cam follower pins hardened heating microtorch about 16000F near orange glow quenchingwith water No annealing tempering done after quench Next valve-drive cam started wear problem mitigated adding oil fuel drilling small breather hole crank case aft cam Oil thereby blown through cam housing splattering oil made new black mess inside models nose now valve system good 50 hours between adjustments next problem Carbon build-up valves spark plug choked engine stop about 10 hours unless baby-sat gradually backed out needle valve reached old bag tricks polyisobutylene chemical used manufacture synthetic rubber viscous liquid does pretty good job lubricating metals instead producing carbon particles cracks mostly combustible hydrocarbon molecules heated Presto Very little carbon formed fuel efficiency increased composition fuel 93% premium grade Mail YOUr Order To* Please Include $250 postage HARDWARE SYSTEMS handling 42a WushingRon Ave S.* Add $150 COD Eden Prairie Mm. 55344* Minn realdenta add 5% sales tax * Orders will shipped within 48 Phone *129418757hours INDIAN CITY RADIO CONTROL CLUB Presents DETROIT EXPO IV Greater Michigan Modelers Show PLANES BOATS 0 CARS MANUFACTURERS STATIC DISPLAYS0 SWAP-SHOP October 123 1982 Eight Mile Artillery Armory Oak Park Michigan Info 6909 Monroe Blvd Taylor MI 48180 U U U I I I like world-taits actual-Sullivan Insta-Just Plstk Conoar Starter. ine Handles feel good tn serve Hook hand can adjus*t quick Dattery itll 38$ IJ-2 especially suiia$e inftaine Incredible ill fit sizes Grab hold starter can shake huNts 5suppliesup ds enginesand unleaded gasoline 7% polyisobutylene tedious work dealt carbure tor standard RC-type needle valve could have installed would have defied simpli city rule Besides hearing poor US FS6O very quiet engine Instead built-in means keeping fuel-air ratio constant throughout power range sought car buretor 15cc OS 10 engine adapted inlet manifold mercury ma nometer attached monitor inlet-manifold pressure fuel fed engine via float chamber 50cc graduated burette needle valve first adjusted lean smooth running full throttle periodic readings rpm manifold pressure fuel level burette number proportional fuel-air ratio calculated Additional sets data recorded lower throttle settings fuel-air ratio never came out constant stock carburetor Usually mixture became very rith low power peculiarly-shaped notch carburetor barrel needed notch shape found grinding little testing fuel-air ratio over whole rpm range grinding little testing again etc etc got right third carburetor fifth weekend during long procedure got absent-minded forgot propeller revving front Ouch Shake shake shake Eventually continuous hands-oft run 50 hours duration made run engine mounted aircraft suspended elastic lines allow entire flight-ready assembly vibrate airborne often hears builder new airplane exclaim flew right off drawing board effusion signifies bad consisted Kraft 533 FM receiver Ace Bantam Midget servos placed far aft reduce chances ignition noise would Continued page 142 July 1982 135 IL GRAB HOLD ly iii th Sri I I I I I I I I I I practice really ought hang up new model shake about 15 minutes per pound before trying fly Controls fuselage radio equipment V -NW yone Sec after 100 pm September 22 touchdown Open apace available landing model chose sit down cook tent PAl rules require landing within 500 meters launch point spot within 10 meters although embarrassing acceptable No damage iota fuel left tank wuniversai type ror encauseg cowls Thrse tail tubes suit engine position Seiect tail pipe remove others desired 0 Small Compact easy attach Tsil pipe extension Included AII mounting hardware clamps screws included THREE SIZES EM-I -19 . 1195 EM-2 -40.. 1295 EM-345.80. 1430 leading dealers available ORDER DIRECT Add 10% postage handling Calif residents add 6% tsi Check Cod accepted_Supply card number date ViSi_or MASTER CARD manifold fit scale model cowls TWo exhaust tubes allow maximum sxhaust removal less heating PITTS STYLE MUFFLERS OFor scale aircraft such PiflS CESSNA 150 Angied exhaust tubee exit bottom cowling OWorm drive mounting strap OTait pipe extensions -. mounting hardwan -1 cause jitter excessive current drain servos As turned out precaution really necessary because very effective shielding eventually installed nickel-cadmium batteries special Hi-Rate type obtained Ace Radio Control can withstand severe over charging no need voltage regulator telemetering unit sensed current flowing out batteries monotonous musical note ground-based receiver gave pleasant assurance well board Servo motions could detected superimposed buzz since charging cur rent changed engine rpm pitch tone indicated engine speed Interference glitching due weak signals could also detected presence scratchy noise ominous sound wasnt heard during record flight polyhedral wing minimizes spiral instability basic model fuel shifting side wing other during uncoordinated turns generates quite load rudder work pilot So electrostatic stabilizer78910 used automatic wing leveling total weight system 1 oz equal hours worth fuel good trade Devices type can also used stabilize pitch attitude feature omitted instance Instead long tail large stabilizer used simple expedient provided substantial margin inher ent pitch stability precluded potential troubles related servo wear extra current drain active pitch stabilization loop Practice practice practice trials work air bugs out system com ponents installed model made relics left over 1960s record attempts flights during dusk dawn periods airplane cannot seen very well neither dark enough see small red green white navigation lights electrostatic stabilizer found big help during periods well during night visual determina tion attitude airplane based solely orientation three tiny candescent bulbs planned flight altitude about 1500 ft above ground 2000 ft above sea level array closely spaced color contrast strongly discernible staring star-like wanderers amongst Orion other rocks heavens hypnotic effect mesmerized keyed-up senses limit three four hours However FAI rule states no assistant pilots allowed use control transmitter electrostatic stabilizer served very effectively towards over coming roadblock Instead having pay attention compensate spiral instability able close eyes relax chaise lounge momentarily pulse control stick hard over response verbal commands observers could staring relays So cat skinned pretested equipment transferred new airframe July 4 baptismal flight mid-August assembly tortured 75 hours ground 25 hours air confidence machine very high remaining task flying 20 hours official witnesses would call some truly dedicated people Exciting boredom what John Worth called during previous 1964 record flight Care taken pick helpers officials qualities included patience stam ina sense humor Weather loomed last barrier model strong enough withstand fairly severe turbu lence avoid unpredictable thunderstorms keep pilots work acceptable level seemed wise wait calm characteristic equinoctial highs convectively stable masses hot air frequently stagnate area during last half September Synoptic weather information sources watched signs usually precede favorable conditions September 12 1 3 great crew officials off Bealeton VA running DCRCs annual Scale competition Wouldnt know year series rapidly-moving cold fronts followed September 20 crew gathered under drizzling clouds went through test run official weighing launching timing procedures next afternoon occluded front stretched east-west Kansas City Philadelphia rain 100 miles north field decided see far could get though 15-mph wind southeast partial overcast gray strato cumulus clouds Usually such conditions get worse before get better Rain high winds expected unless front changed its direction record flight launch went off planned 5 pm sundown 730 pm clouds cleared wind dead calm ground obviously flow 1500 ft model sat nearly stationary its airspeed matching wind must have near 20 mph southeast 830 pm observer method working well clear star-laden sky Two artificial satellites seen about time boredom relieved philosophical 142 Model Aviation I I Plasticote Propeller OR LARGE new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER LIGHTER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 discussions inspired sightings couple old Sputnik jokes came out woodwork too like Hey did hear Russians put 10 cows orbit say its herd shot round world midnight observers practiced giving yaw pitch trim commands competing see could hold new constellation stationary longest period long times could mistaken star got little sleepy missed few commands stir attention George Pickrell jumped up onto box bellowed Holy cats three guys coming over hill camels Theres nothing like healthy guffaw keep party alive About 2 am heavy ground fog formed stayed through night never grew thicker about 75 ft Sideways visibility 50 ft would have no way accom plish safe landing engine failed Vertically navigation lights stars could seen through cone-shaped hole 5 am wind aloft shifted west Hooray front moving away visibility cone however diminished about 200 included angle Ground equipment crew blankets soaked dew tension building because never flown through very foggy dawn six pairs eyes two pairs field glasses made 9 am thermal convection winds about 10 mph ground level causing model bounce nighttime observer procedure abandoned 1030 husky bumps causing excessive currents electrostatic stabilizer system aid shut down 1 pm 3V3 hours past prior record airplane performing admirably telemetry saying everthings fine grumpy over one-pilot rule otherwise felt OK landing 500 meters launch would scrub record claim decided wed done enough pushed engine shutdown button gust blew airplane onto collision couse wifes shiny new Honda during final approach interest continued harmony no choice except pull up over car model ignominously impaled corner pole cook tent 10 meters launch point home nonetheless valid claim record Inferred results implications gross takeoff weight model 498kg 1096 lbs 173kg 61 oz fuel model landed little half 089kg3 oz fuel still tank Thus model has theoretical capability flight excess 40 hours models gas mileage figure 1500 mpg its estimated FAI legal range wind nearly 1000 miles fuel consumption rate 42 gm/hr 15 oz/hr impressively low no miraculous engine efficiency involved performance As evidence consider following points model flown about 25 mph through flight probably has liftto-drag ratio about 10 speed Assuming propeller efficiency about 05 specific fuel consumption can calculated about 103 lb/hp-hr rae about 10 times smaller what goes nto two-cycle engines alcohol still nearly twice some larger four-cycle engines used manned air craft Further improvements engine therefore theoretically possible would easily achieved small size Continued page 146 Its incredible heres true Epoxy Paint thats Pre-mixed 000 can! 0@ RITES BLACK AARON PueIPrc42 pa Tnt No pot life ixing proof Lightweight r tough a Flexible C@/ERITE 420 BABYLON ROAD/HORSHAM PA 19044 Model Ii S th I10 5O1 4O IJ Local Dealer Send $1 00 Catalog Juiy 1982 143 System Hi-Starts 101 Ceeaplet Nt-Seen Kit Mie AeceenEly 14 Pound Pull tOO Feet Sleet Surgical Late Continuous Piece Section Reel Line Chute Stoke Tow Rings Hardware elig240o 102 Coenplcee 2-Mete Hi-Stan Kit 5 Pound Pill hO Feet 1 4 inch Slack Late Reel Line Chute Stake HardwCrC Etc $1700 103 Splaoetet Tobeg Opees Cl. Type tOO Feet Slack Surgical Late. 14 lb Pull $1800 104 Seplaoeerel Tebing 2-Megee S lb Poll S 500 10$ Nylee Hi-Stan UeeTwitted S 326 55 lb Test White ColorStaided g42S 106 Steedeed Pereehot Sd Celee Tow SinS5 325 105 Reel SiC Poe Hi-Stan Oteok Wied-UpLarge $ BOO CeterpletO Teogh Pleohe HdweeSmall 5 450 System II Winch 111 Pro-Lasech Coerteat WieOtt Mb ho Keen Edge State 01 art comelernlc ready-to-use less hatternI 12 oclt nonahie winch ncudecwheelc handle motor tuct twIn h reel ritnarcund oIl electrical wiring lice chute Hock-nc hatterc end ccii readn Ic fly S2$$00 112 Pre-tasech Wktch Preen. Seal Tureeroced includes drilled Iroere reel turnarnundS cairo $15000 107 Winch Cleat 18 led Ojeeseter 230 lb Teet Heauc DuIn Tow Sing Connecting Ring $825 105 Wiech Line 2000 Cl Scaided Nylee $3 lbTeet$1500 Choice ci Pill Test White Colot 1 tS lb Test $2000 Top Ouclito Acailable Soacral 153 lb Test $2600 Orders Othet Listed 180 lb Test $3200 System III Power Pod 110 Powee Pod desigeed Ed Ceontghtl Icr 2-mole sci Iclaces lihergiacs huill- ecira tank allowS tO mint- engine run fur use OdS metal lank engines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 P011 IN 47454 ELECTRONIC SERVICENTER FACTORY AUTHORIZED WARRANTY SERVICE FOR KRAFT over 35 other manufacturers Cleaning adjustment nsmitter receiver up 4 servos $2500 plus parts 24 HOUR SERVICE74 ZOUR SERVICE NEAL WARREN ~c13 South 21st Street Sp Philadelphia PA 19103 Tel 215 564-0800 Mon-Fri 9AM-53OPM Wed night till 8PM Sat 9AM Noon KIT S 9 Hi GLIDERS 3 SATELLITE KITS 17 OLD TIME GAS Send 25 for5 RUBBER 3 NORDICfine instruments 1980 catalog9 COMPETITION GASsmall craft & aircraft design FUEL DT TIMERS -$1075 eachOur comprehensive catalog return F Al Model SupplyBox 1534 Southold NY Ei P0 BOX 3957TORRANCE CA 90510inc 11971 516 765196Oar interesting Speculate what kind per formances might obtained all-out legal FAT model Suppose example spindly toothpicky monster model utmost structural efficiency made instead fairly robust Also assume use carbon fibers Kevlar titanium samarium cobalt magnets lith ium batteries solar cells tough microfilm coverings Further make tandem wing maximum allowable arear course install lightweight electrostatic pitch stabilizer allow equal loading both surfaces Work improving specific fuel consumption fly still slower speed long might fly Two hundred hours seems possible far Capa bility non-stop San Francisco Boston flight would reasonable expectation matter would New York Paris flight would some very difficult logistics problems associated such attempts have absolutely no interest trying prove can stay awake longer somebody elseso Itm inclined try something easier like tuming electrostatically- stabilized machines loose upper end Grand Canyon terrain avoidance features stabilizer would automatically steer machine down valley70 Wetd launch Moab UTr hop jet HooverDam sit inabartellingflyingstories waiting machine arrive day later Another dream another time Acknowledgements officials observers provided valuable help encouragement during record flight also during preparatory test flights am very grateful patience humor hard work contributed Mr Charles Calvert Contest Director Mr Wayne Simpsonr Mr Jack Anglin timers Mssrs Michael DeMuth George Pickrell Glen Scillian official observers pilOtrs assistants Helpful advice about lubrication problems obtained Mr Don Lindley Amoco Research Laboratories Mr Ray Cramer provided useful consultations aerodynamics Valuable technical assistance contributed members District Columbia Radio Control Club DCRC particular Mr Ben Givens worked telemetry devices Messrs Melvin Newcomer William Charbonneau Robert Lee assisted design fabri cation electrostatic stabilizer other electronic units Mr Paul Nash granted use runways gliderport Brookeville MD facility valuable asset project Mrs Lillian Goldfinger Johns Hopkins Uni versity Applied Physics LabAPL made useful suggestions patiently typed badly scribbled drafts Dr Gordon Dugger APL edited improved original manuscript effot greatly appreciated References I Hill ML. Beat RuSsians Bust Model Airplane News Vol 72 No Feb 1965 p 28 2 Hill ML. 27000 Feet Its Catbird Country Fisning Models #406 Jan 1971 p 18 3 Hill ML. Shuffle Off Buffalo Model Air plane News Vol 73 No 2 Feb 1966 p 30 4 Hill ML. II l Hours Exciting Boredom Firing Models #390 Sept 1969 p 6 5 Hill M L Tonoise World Speed Record Model Elsing Models *359 Jan 1967 p 20 6 Hill ML. Bong Boomer World Record Soaring Glider Fisring Models #360 Feb 1967 p 9 7 Hill ML. Introducing Electrostatic Autopilots Astronautics Aeronautics Vol 10 No 1 Nov 1972 pp 22-31 8 Hill ML. Electrostatic Autopilot RC MOdelsrr Flying Models #431 Feb 1973 p 20 9 Hill ML. Design Performance Electro statically Stabilized Delta Planform Mini RPVs Con ference Proceedings Milirarsr Electronics Defense Ex position Wiesbaden Germany Oct 977 Injeravia SA Geneva Switzerland pp 847-861 10 Hill ML. Whyte TR. Weiss RO. Rubio R Isquierdo M.Use Atmospheric Electric Fields Vertical Stabilization Terrain Avoidancerr Pro ceedings ofAJAA Guidance & Control Conf Albu querque NM. August 19-21 1981 ATAA Paper *81-I 848-CP AMA Building/Mankowski Continued page 45 New Chaiter Members AMA Builders plaques recognizing $500 contributions Ilsis lnonth Free Flight Model Airplanc Association Southern California Northern Virginia Radio Control Inc Detroit Aero Modeler RCr tner Robert Reder Walter Hartung Contributing Members Honor Roll listing donations $100 up now included Sooner Circle Burners Kennebec Valley Mod el Avialors Twin City Radio Controllers Inc l-lightmasters Klamath Falls Cincin nati Aero Modelers San Gabriel Valley RC League WINGSr Tidewater RC Club Ever green Radio Modelers Association Monmouth Model Airplane Club Skylarks Sharon McDonnell-Douglas RC Club Memphis Prop Rusters Niagra County RC Club Sacramento RC Club Reno Radio Control Club Greater Cincinnati RC Arvada Associated Modelers Goodyear Model Aircraft Club Niagara Sun day l1rers Inc Pomona Valley Model Air plane ClObr Riverside RC Club again Alfred Twyla Lchmberg Robert Krafft Carl Otto Margaret Walinski John Williams John Grigg Ed Louise 146 Model Aviation PRC LRUflCH SYSTEMS Rugged Simplicity Top Performance Reasonable Price Oreect 5alee/ Ida MiddleMen/Hi-5taetoAle KitFoemftd Minute Aasewblv 7 Coerplete looteuctruce Included No special 71010 Regoreed / Seod SANE Fun Funhen lirfeematron Ordee List peodoots Total / Add S200 Skipping gend Menen aede Cheeb CreditCord Notetbet end Eep Data/COO Add 5150/ Aleska Add 5350 / Hawaii Will COO Shipping Mail ot Phone I Wiech OtiterePegeteet Adneeco Will COO Phone Orders Waloerne / Mail Order Phone Orders nS/ Welcome
Edition: Model Aviation - 1982/07
Page Numbers: 78, 79, 80, 81, 133, 134, 135, 142, 143, 146
NO OCR TEXT Victory brings out smiles faces tired crew after 20-hr flight near Brookeville MD September 21-22 1 gai DCRC members worked hard during preparatory flights well official attempt Left right Mike DeMuth pilots assistant Jack Anglin Wayne Simpson timers Maynard Hill pilot George Pickrell Charlie Calvert CD Glen Scillian assistant CD Secrets success revealed test took literally years planning new FAI Dura tion World Record just over 20 hours powered RC models pilot estab lished last Septem ber lot problems solved keep model airthat long man set record describes prob lems trials errors eventual success unique flying machine planes may seem ugly facts boxes dont try move too fast Mother Nature puts some beautiful useful curves invisible air flowing near Inside boxes Well New Faithfuls internals also lessthan-elegant appearance Wires springs fuel tubes lacing cords shock-mounted para phernalia tangled end end scene included few splotches dried blood deposited evidence elbows propellers dont mix Any way look machine beautiful accurate adjective something admirable about way models guts frame muscles operated produce desired performance Twenty-five explosions per second shook machine like being hit tympanists mallet mezzo-forte Cranks turned valves slid bearings twirled gears whined sparks zapped springs twanged pushrods rocker arms beat tickety-tack rhythm against drone vibrating drum-tight skins cacaphony compounded whooshing propeller piccolo-like whistle air rushing tiny carburetor Indoors trillions electrons shoved alternator through maze diodes chips chokes connector plugs rainbow-colored harness wires move motors gears July 198279 Truss structures false ribs holey main ribs balsa box fuel tank visible shot Fuselage bottoms wing tips andstab covered wIth white opaque MonoKote remainder translucent orange scheme viewed best compromise visibility night during day Lights located teardrop-shaped lenses wing tip under stab Dark patches wing tips copper tape Staticmaster ionizers used part electrostatic wing leveller Flywheel magneto look like ugly bulges aerodynamic penalty small linkages Incandescent lights glowed wing tip atmospheric ions also being interrogated get reports bank angle happened comfortable womb laboratory out Mother Natures soggy foggy bumpy atmosphere very gratifing experience coax machine through two million thumps missed beat project hobby venture extraneous authors profession deals development remotely-piloted vehicles goal fly long time approach keep simple schedule whenever ready motivation fun Some aeromodeling techniques equipment employed may practical interest responsible developing long-duration drones unmanned vehicles UVs com munication relays decoys surveillance elec tronic countermeasures other uses idea model airplane technology might used reduce cost operational military systems very popular early 70s mixed reviews its merits have cropped up because some goals expectations went out bounds Perhaps article will bolster fundamentally sound idea would gratifying result However inside out side secrets New Faithful will exposed primarily help modelers also perhaps steer few fun breaking records Features New Faithful crate-like appear ance New Faithful consequence FAI rule limits Scale models gross takeoffweight 5 kg 1102 lb Aerobatic racing models seldom approach limit Duration models restriction means way increase fuel capacity decrease structural weight Engine displacement limited 10cc 061 cu lifting surface areawing tail restricted l5m sq 1615 sq ft neither rules influenced design wing sized fit inside Toyota Hatchback although largest per missible engine installed normally loafed 80 Model Aviation Left Charlie Calvert CD congratulates Maynard Hill Lots things have changed since similar picture made Frank Ehling Hill Old Faithful September1904 Planes look alike bellies larger important valuable changes have brought hobby AMA Only 18000 members got black-and-white pamphlet 1964 AMA close trouble now iargest sport aviation organization world Modified 05 FS6O used New Faithful mounted horizontally vibration dampening Reworked 05 10 throttle used Text explains lubrication wear problems magneto-flywheel spark ignition system Warningread text about flywheel shape Vibration testing done hanging model coat hangers foam pads elastic lines running ceiling back porch Hill FlyBy Night Aircraft Co Tail tied spring-loaded storm door door opening used approximate prop thrust Fuel frothing servowear other problems can detected method author recommends forchainsaw-powered models New Faithful wentthrough continuous 50-hour run prior its first test flight along 20% full power model size configuration could probably climb Out gross weight 11 lb loaded maximum fuel would have potential flight 200hr duration 6400-km 4000-mi range FAIs technical rules sensible promote safety provide common basis world-wide comparison generate some tough challenges rule permits pilot handle radio controls however would have repealed Duration records much beyond present made possible Editor FAIModel Committee ClAM has agreed provide pilot relief during such record attempts Subject approval overall FAI Sporting Com mittee will effective 1983 Development airplane matter putting some old principles together func tional way Reliability obtained fixing changing things failed during hours testing approach solving problems always seek simpler principle rather add complicated parts key functional components shown structural drawing engine modified 05 FS6O FS means four-stroke Fuel fed carburetor tank wing Fuel flow rate pressure steadied inter dicting float chamber Herein lies reason droop snoot Gravity dependable pumps modified bicycle alternator connected engine power takeoff through 21 step-up gear train Electric power alternator rectified dc filtered choked RF delivered aft under stabilizer RC receiver servos set small 100 mAh nickel-cadmium batteries located batteries provide safe landing case engine failure alternator powers control equipment three tiny lights needed wing tips tail night flying Also wing tips Staticmaster ionization units used electro static autopilot senses vector electric field exists atmosphere thereb4 Jrovides automatic leveling wings l telemetry transmitter hangs its dipole antenna station forward electrostatic stabilizer shown another vital unit Kraft transmitter flight tied automobile battery Thats put fuel tank spin prop life thing sustains itself least 20 hours airframe Balsa wood bridge-truss structures efficient easy build Streamlining boxes would add weight worth category competition Most airframe made ofcontest grade balsa coveringis Top Flites MonoKate fuselage outer wing panels stabilizer white opaque remainder translucent orange combination chosen best compromise daytime nighttime visibility bridge-truss spar wing front member protrudes way promotes early Onset turbulence boundary layer Usually airplane designers try keep boundary layers laminar over first half wing chord slow-flying models its easy induce laminar boundary layer persist too far flow can separate easily rear portion airfoil separation occursand probably will bumpy air en counteredthe result can drag force consid erably larger associated tripped turbulent boundary layer tends stay attached fuel tank does double duty center wing spar assembly 1/16 00 e 00 OCo tii~n 332 v0r 322 t8t5 23 212334 25 2357 5 10 1112150 O Propellor 16 dia tO pitch O Magneto & flywheel 05F560 engine modified @ 0S10 carbureto, modified Cam housing rea power take-off Filler made-from chemists filter paper O Float chamber Flearbie coupling rubber auto fuel hosel Two utep op gear train Fleoible coupling tygon tuhiegi Bicycle alternator @ Rectifier filter 6J Filters mesh iretal 3 200 mesh nylon er paper 062 Fuei tank sump also main center spar Telemetry transmitter j Incandescent bulbSO ma @SV red & greee lenses Stattcmaster 2y 500 ionizer Grounded guard strip copper tapel Auxiliary collector copper tapel @ Electrostatic autopilot Same 16 white lens @ Throttle serno Elevator rudder servos Kraft KP7F receiner @ Battery pack 1100 maHi NEW FAITHFUL cture componBnt layout sheets contest grade balsa coated internally epoxy resins impervious gasoline polyester resin covered externally fuel discussed later failures can result single layer fiberglass i/a oz/sq yd impreg- additions nitromethane propylene oxide ether nated same resin Most polyester Continued page 133 July 198281 Super Mini Boy Recommended Eigines Radios- Mufflers Helicopter tools stock Worlds stable easiest fly small 40 size R/O Helicopter Low maintenance mechanics engineer ed Dieter Schiuter Father RIO Helicopters Features fully collective Bell mixing main rotor head upright spinner starting straight shaft driven tail rotor & automatic compensation symmet rical prebuilt main rotor tail rotor blades autorotation clutch Uses standard 4 chanel radio Kits parts stock guarantee helicopters fly Ask man flies Move up Schiuter inSifrp U SEAN IflG subsidiary MINIATURE AIRCRAFT 2594 North Orange Blossom Trail ndo FL 32804 Phone 30514224531 test fuselages six flight fuselages high-altitude version Ranger V- 12 seriously delayed XP-77 use low-altitude engine its performance would inferior fighter airplane comparison existing models now production ac cording USAAF Technical Report #5359 Vidal Research took over job building wings made schedule slip Problems arose over matters basic time needed spread glue Completion first airplane delayed February 1944 Marcfr would make almost 1 years late wasnt until April Fools Day 1944 XP-77 flew Bells Niagra Falls NY factory Success last Far proto type arrived Wright Field May 2 soon revealed serious vibration 1700 rpm 2300 rpm probably due lack shock absorbers engine mounts June 6 1944 Allied troops storming Nor mandy beaches final assault Nazi-held Europe USAAF got around giving prototype XP-77 its serial number 43-34915 Official flight tests carried out Eglin Field FL second XP-77 43-34916 starting late July 1944 October 2 airplane fell out Immelmann turn inverted spin pilot recovered air plane went upright flat spin could recover forced jump pilot landed safely airplane demolished proved last straw project ended December 2 March 1945 war drawing close Army Air Forces completed report Flight Tests Bell XP-77 Airplane following has excerpted general handling characteristics XP-77 airplane satisfactory although restric tions evented dives spins violent maneuvers jectionable feature control system fixed trim tabs ailerons rudder results condition flight airplane will fly stick- rudder-free ground setting the. tabs Visibility good conditions flight ground handling Noise vibration cockpit considerable cockpit becomes very cold uncomfortable cold weather high altitude cockpit heat available high speed 328 mph obtained military power 3150 rpm 416 mani fold pressure 12600 ft critical altitude high speed 330 mph obtained war emergencypower 3300 rpm and57 at4000 ft critical altitude maximum rate climb obtained war emergency power 3630 feet per minute critical altitude 2000 ft ConclusionsThe overall performance XP-77 airplane inferior present fighter aircraft employed AAF results flight tests considerably lower estimated performance set Bell Aircraft Corp maximum speed airplane war emergency power considerably lower other AAF interceptor aircraft operating military power maximum rate climb military power very low interceptor air craft low service ceiling airplane renders useless against high altitude aircraft bad XP-77 fell 90 mph short its promised top speed rate climb no better 200-hp Pins Special aerobatic biplane service ceiling 30000 ft era P-38s would go 39000 ft P 51s would top 40000 ft interesting idea didnt work taught its creators lesson very very difficult build truly lightweight fighter plane General Dynamics learning lesson over again its F- 16 no longer lightweight Mach 2 ter course doesnt make sense give up such worthy goal As matter fact start Cassutt will close 250 mph 135-hp weighing little over 500 lb add couple machine guns some fuel radio two ours/Hill Continued page 80 other useful ingredients avoid building wing spar might dis solve its contents during flight samples balsa coated variety resins placed baby food jars containing candidate fuels array samples stored months backyard greenhouse exposure thermal cycling solvents brutal test Some combinations looked satisfactory dur ing winter turned messes July Sig Mfg Cos polyester finishing resin eventually chosen K&B finishing resin fared equally well test Scale modelers using chainsaw engines might find idea useful Its OK gasoline havent found resins will resist fuels containing nitromethane ether Engine modifications OS F560 engine received designed use glow plug ignition regular alcohol-based model fuel Gasoline far efficient alcohol glow plug ignition doesnt work well gasoline based fuels unless compression ratio increased point mechanical problems July 1982 133 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS 444444444* **4ATYOURFINoERTIPS4444MAYU* * Watch For**SHOWED ALLOY PARTS WITH* ***NO ORGANIZER AT OVER FIFTY* *Upcoming Ktsl**OOLLARS THAN TWICEOUR* *** 495* ****************44444444*444444* HSA735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST 2-56 3 16 SOCKET HEAD CAP SCREW 2-56 1 4 SOCKET HEAD CAP SCREW 3-56 I 2 SOCKET HEAD CAP SCREW 4-40 I 4 SOCKET HEAD CAP SCREW 4-40 1 2 SOCKET HEAD CAP SCREW 4-40 34 SOCKET HEAD CAP SCREW 4-40 1 SOCKET HEAD CAP SCREW 6-32 1 4 SOCKET HEAD CAP SCREW 6-32 I 2 SOCKET HEAD CAP SCREW 6-32 34 SOCKET HEAD CAP SCREW 6-32 1 SOCKET HEAD CAP SCREW 6-32 l SOCKET HEAD CAP SCREW 6-32 2 SOCKET HEAD CAP SCREW FLAT WASHERS SAE ZINC PLATED 2 4 iii~ PCS 25 25 25 20 20 20 20 IS 15 IS 15 15 15 75 50 75 90 TOTAL PCS 735 5 NYLON INSERT LOCK NUTS ZINC PLATED 2-56 4-40 6-32 * * * **** ********************* KITS COME COMPLETE WITH 18 COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER ONLY $2495 NEW THE POWRWIr%IC4ANDTHE RETRIEVER POW RWINCH perfect casanion * $27500 RErRThVER Both units use special plus shipping 4pole permanent magnet lc* current drain less battery 12 volt nortor design also inCnrpor ates lighteeight heavy duty welded arKi painted steel frane features adjustable nvtor sounting plate insure proper drive tension PCM R b mater unlimited ttnnaters WINaS has handle either ,u anythirsg between rid pro tected font switch operation ed towline druis a-sstruction required anti-kiting braking can readily disengaged e Manual drun brake retrieval takeup antrol 2000 feet braided nylon line tCs riixn ball-beering swivel bearing turnaround hub RETR EVER will eliminate losing turn frequency because long turnaround tines retrieving lines Line orossings due wind shifts using multiple winches will longer probl40n Best 11 have launch-a-minute capability Other features incltxle e Drag-free operation due flycasting imde Battery cables heavy duty clips feet braided nylon line ball bearing swivel Guide line aligrinent takeup nEsie nd prevent line tangling drive shaft WRITE FOR MORE I14FO1L&flON 4DAVEY $22500SYSTEMS plusmFinE CORPORATION shippingONE WOOD LANEMALVERNPA19355 * INTRODUCTORY PRICE 1982 134 Model Aviation severe Furthermore fuel-air mixtures become extremely critical Sensitive temperature humidity changes toyed enough Such ideas reach conclusion spark ignition its heavy coils radio interference problems bound better method So magneto coil flywheel grass trimmer engine Lawn Boy part #06823-07 -08 mounted front housing flywheel originally round cut dumbbell shape reduce weight Warning Dont try dodge engine turns up usual 9000 rpm dumb bell will fly apart prove have paint can hole waste basket large bulge sand annulus between containers Some sand flew out top flywheel broke Taking fatigue account wouldnt trust thing above 5000 rpm Top speed engine 16 x 10 hand-carved propeller around 4500 rpm coil called solid-state magneto spark discharge triggered same magnetic flux energizes coil inner secrets device seem proprietary two important observations can made knowing exactly works 1 no points wear Out 2 generates milder form radio-frequency noise either point systems capacitance discharge systems RF noise can effectively suppressed putting 10K resistor series plug putting shield over high-tension lead Until about 1979 engines being massproduced hobby use two-stroke type until flight 1981 World Records Power categories estab lished such engines Although experi mented earlier homemade four-stroke engines have better fuel efficiency perfecting engine Duration takes lots spare parts no serious effort made use such design until OS FS6O appeared engine remarkably well built have run 400 hours bearings piston fit compression practically good new Some problems however showed up valve/rocker-arm/cam system partly because very little lubricant being used effort attain high fuel efficiency Valve clearances reset three hours after 24 hours pushrods too short permit further adjustment problem partially fixed weakening shortening valve springs replacing pushrods pieces Allen hexwrench material 5/64 across flats tips pushrods tips cam follower pins hardened heating microtorch about 16000F near orange glow quenchingwith water No annealing tempering done after quench Next valve-drive cam started wear problem mitigated adding oil fuel drilling small breather hole crank case aft cam Oil thereby blown through cam housing splattering oil made new black mess inside models nose now valve system good 50 hours between adjustments next problem Carbon build-up valves spark plug choked engine stop about 10 hours unless baby-sat gradually backed out needle valve reached old bag tricks polyisobutylene chemical used manufacture synthetic rubber viscous liquid does pretty good job lubricating metals instead producing carbon particles cracks mostly combustible hydrocarbon molecules heated Presto Very little carbon formed fuel efficiency increased composition fuel 93% premium grade Mail YOUr Order To* Please Include $250 postage HARDWARE SYSTEMS handling 42a WushingRon Ave S.* Add $150 COD Eden Prairie Mm. 55344* Minn realdenta add 5% sales tax * Orders will shipped within 48 Phone *129418757hours INDIAN CITY RADIO CONTROL CLUB Presents DETROIT EXPO IV Greater Michigan Modelers Show PLANES BOATS 0 CARS MANUFACTURERS STATIC DISPLAYS0 SWAP-SHOP October 123 1982 Eight Mile Artillery Armory Oak Park Michigan Info 6909 Monroe Blvd Taylor MI 48180 U U U I I I like world-taits actual-Sullivan Insta-Just Plstk Conoar Starter. ine Handles feel good tn serve Hook hand can adjus*t quick Dattery itll 38$ IJ-2 especially suiia$e inftaine Incredible ill fit sizes Grab hold starter can shake huNts 5suppliesup ds enginesand unleaded gasoline 7% polyisobutylene tedious work dealt carbure tor standard RC-type needle valve could have installed would have defied simpli city rule Besides hearing poor US FS6O very quiet engine Instead built-in means keeping fuel-air ratio constant throughout power range sought car buretor 15cc OS 10 engine adapted inlet manifold mercury ma nometer attached monitor inlet-manifold pressure fuel fed engine via float chamber 50cc graduated burette needle valve first adjusted lean smooth running full throttle periodic readings rpm manifold pressure fuel level burette number proportional fuel-air ratio calculated Additional sets data recorded lower throttle settings fuel-air ratio never came out constant stock carburetor Usually mixture became very rith low power peculiarly-shaped notch carburetor barrel needed notch shape found grinding little testing fuel-air ratio over whole rpm range grinding little testing again etc etc got right third carburetor fifth weekend during long procedure got absent-minded forgot propeller revving front Ouch Shake shake shake Eventually continuous hands-oft run 50 hours duration made run engine mounted aircraft suspended elastic lines allow entire flight-ready assembly vibrate airborne often hears builder new airplane exclaim flew right off drawing board effusion signifies bad consisted Kraft 533 FM receiver Ace Bantam Midget servos placed far aft reduce chances ignition noise would Continued page 142 July 1982 135 IL GRAB HOLD ly iii th Sri I I I I I I I I I I practice really ought hang up new model shake about 15 minutes per pound before trying fly Controls fuselage radio equipment V -NW yone Sec after 100 pm September 22 touchdown Open apace available landing model chose sit down cook tent PAl rules require landing within 500 meters launch point spot within 10 meters although embarrassing acceptable No damage iota fuel left tank wuniversai type ror encauseg cowls Thrse tail tubes suit engine position Seiect tail pipe remove others desired 0 Small Compact easy attach Tsil pipe extension Included AII mounting hardware clamps screws included THREE SIZES EM-I -19 . 1195 EM-2 -40.. 1295 EM-345.80. 1430 leading dealers available ORDER DIRECT Add 10% postage handling Calif residents add 6% tsi Check Cod accepted_Supply card number date ViSi_or MASTER CARD manifold fit scale model cowls TWo exhaust tubes allow maximum sxhaust removal less heating PITTS STYLE MUFFLERS OFor scale aircraft such PiflS CESSNA 150 Angied exhaust tubee exit bottom cowling OWorm drive mounting strap OTait pipe extensions -. mounting hardwan -1 cause jitter excessive current drain servos As turned out precaution really necessary because very effective shielding eventually installed nickel-cadmium batteries special Hi-Rate type obtained Ace Radio Control can withstand severe over charging no need voltage regulator telemetering unit sensed current flowing out batteries monotonous musical note ground-based receiver gave pleasant assurance well board Servo motions could detected superimposed buzz since charging cur rent changed engine rpm pitch tone indicated engine speed Interference glitching due weak signals could also detected presence scratchy noise ominous sound wasnt heard during record flight polyhedral wing minimizes spiral instability basic model fuel shifting side wing other during uncoordinated turns generates quite load rudder work pilot So electrostatic stabilizer78910 used automatic wing leveling total weight system 1 oz equal hours worth fuel good trade Devices type can also used stabilize pitch attitude feature omitted instance Instead long tail large stabilizer used simple expedient provided substantial margin inher ent pitch stability precluded potential troubles related servo wear extra current drain active pitch stabilization loop Practice practice practice trials work air bugs out system com ponents installed model made relics left over 1960s record attempts flights during dusk dawn periods airplane cannot seen very well neither dark enough see small red green white navigation lights electrostatic stabilizer found big help during periods well during night visual determina tion attitude airplane based solely orientation three tiny candescent bulbs planned flight altitude about 1500 ft above ground 2000 ft above sea level array closely spaced color contrast strongly discernible staring star-like wanderers amongst Orion other rocks heavens hypnotic effect mesmerized keyed-up senses limit three four hours However FAI rule states no assistant pilots allowed use control transmitter electrostatic stabilizer served very effectively towards over coming roadblock Instead having pay attention compensate spiral instability able close eyes relax chaise lounge momentarily pulse control stick hard over response verbal commands observers could staring relays So cat skinned pretested equipment transferred new airframe July 4 baptismal flight mid-August assembly tortured 75 hours ground 25 hours air confidence machine very high remaining task flying 20 hours official witnesses would call some truly dedicated people Exciting boredom what John Worth called during previous 1964 record flight Care taken pick helpers officials qualities included patience stam ina sense humor Weather loomed last barrier model strong enough withstand fairly severe turbu lence avoid unpredictable thunderstorms keep pilots work acceptable level seemed wise wait calm characteristic equinoctial highs convectively stable masses hot air frequently stagnate area during last half September Synoptic weather information sources watched signs usually precede favorable conditions September 12 1 3 great crew officials off Bealeton VA running DCRCs annual Scale competition Wouldnt know year series rapidly-moving cold fronts followed September 20 crew gathered under drizzling clouds went through test run official weighing launching timing procedures next afternoon occluded front stretched east-west Kansas City Philadelphia rain 100 miles north field decided see far could get though 15-mph wind southeast partial overcast gray strato cumulus clouds Usually such conditions get worse before get better Rain high winds expected unless front changed its direction record flight launch went off planned 5 pm sundown 730 pm clouds cleared wind dead calm ground obviously flow 1500 ft model sat nearly stationary its airspeed matching wind must have near 20 mph southeast 830 pm observer method working well clear star-laden sky Two artificial satellites seen about time boredom relieved philosophical 142 Model Aviation I I Plasticote Propeller OR LARGE new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER LIGHTER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 discussions inspired sightings couple old Sputnik jokes came out woodwork too like Hey did hear Russians put 10 cows orbit say its herd shot round world midnight observers practiced giving yaw pitch trim commands competing see could hold new constellation stationary longest period long times could mistaken star got little sleepy missed few commands stir attention George Pickrell jumped up onto box bellowed Holy cats three guys coming over hill camels Theres nothing like healthy guffaw keep party alive About 2 am heavy ground fog formed stayed through night never grew thicker about 75 ft Sideways visibility 50 ft would have no way accom plish safe landing engine failed Vertically navigation lights stars could seen through cone-shaped hole 5 am wind aloft shifted west Hooray front moving away visibility cone however diminished about 200 included angle Ground equipment crew blankets soaked dew tension building because never flown through very foggy dawn six pairs eyes two pairs field glasses made 9 am thermal convection winds about 10 mph ground level causing model bounce nighttime observer procedure abandoned 1030 husky bumps causing excessive currents electrostatic stabilizer system aid shut down 1 pm 3V3 hours past prior record airplane performing admirably telemetry saying everthings fine grumpy over one-pilot rule otherwise felt OK landing 500 meters launch would scrub record claim decided wed done enough pushed engine shutdown button gust blew airplane onto collision couse wifes shiny new Honda during final approach interest continued harmony no choice except pull up over car model ignominously impaled corner pole cook tent 10 meters launch point home nonetheless valid claim record Inferred results implications gross takeoff weight model 498kg 1096 lbs 173kg 61 oz fuel model landed little half 089kg3 oz fuel still tank Thus model has theoretical capability flight excess 40 hours models gas mileage figure 1500 mpg its estimated FAI legal range wind nearly 1000 miles fuel consumption rate 42 gm/hr 15 oz/hr impressively low no miraculous engine efficiency involved performance As evidence consider following points model flown about 25 mph through flight probably has liftto-drag ratio about 10 speed Assuming propeller efficiency about 05 specific fuel consumption can calculated about 103 lb/hp-hr rae about 10 times smaller what goes nto two-cycle engines alcohol still nearly twice some larger four-cycle engines used manned air craft Further improvements engine therefore theoretically possible would easily achieved small size Continued page 146 Its incredible heres true Epoxy Paint thats Pre-mixed 000 can! 0@ RITES BLACK AARON PueIPrc42 pa Tnt No pot life ixing proof Lightweight r tough a Flexible C@/ERITE 420 BABYLON ROAD/HORSHAM PA 19044 Model Ii S th I10 5O1 4O IJ Local Dealer Send $1 00 Catalog Juiy 1982 143 System Hi-Starts 101 Ceeaplet Nt-Seen Kit Mie AeceenEly 14 Pound Pull tOO Feet Sleet Surgical Late Continuous Piece Section Reel Line Chute Stoke Tow Rings Hardware elig240o 102 Coenplcee 2-Mete Hi-Stan Kit 5 Pound Pill hO Feet 1 4 inch Slack Late Reel Line Chute Stake HardwCrC Etc $1700 103 Splaoetet Tobeg Opees Cl. Type tOO Feet Slack Surgical Late. 14 lb Pull $1800 104 Seplaoeerel Tebing 2-Megee S lb Poll S 500 10$ Nylee Hi-Stan UeeTwitted S 326 55 lb Test White ColorStaided g42S 106 Steedeed Pereehot Sd Celee Tow SinS5 325 105 Reel SiC Poe Hi-Stan Oteok Wied-UpLarge $ BOO CeterpletO Teogh Pleohe HdweeSmall 5 450 System II Winch 111 Pro-Lasech Coerteat WieOtt Mb ho Keen Edge State 01 art comelernlc ready-to-use less hatternI 12 oclt nonahie winch ncudecwheelc handle motor tuct twIn h reel ritnarcund oIl electrical wiring lice chute Hock-nc hatterc end ccii readn Ic fly S2$$00 112 Pre-tasech Wktch Preen. Seal Tureeroced includes drilled Iroere reel turnarnundS cairo $15000 107 Winch Cleat 18 led Ojeeseter 230 lb Teet Heauc DuIn Tow Sing Connecting Ring $825 105 Wiech Line 2000 Cl Scaided Nylee $3 lbTeet$1500 Choice ci Pill Test White Colot 1 tS lb Test $2000 Top Ouclito Acailable Soacral 153 lb Test $2600 Orders Othet Listed 180 lb Test $3200 System III Power Pod 110 Powee Pod desigeed Ed Ceontghtl Icr 2-mole sci Iclaces lihergiacs huill- ecira tank allowS tO mint- engine run fur use OdS metal lank engines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 P011 IN 47454 ELECTRONIC SERVICENTER FACTORY AUTHORIZED WARRANTY SERVICE FOR KRAFT over 35 other manufacturers Cleaning adjustment nsmitter receiver up 4 servos $2500 plus parts 24 HOUR SERVICE74 ZOUR SERVICE NEAL WARREN ~c13 South 21st Street Sp Philadelphia PA 19103 Tel 215 564-0800 Mon-Fri 9AM-53OPM Wed night till 8PM Sat 9AM Noon KIT S 9 Hi GLIDERS 3 SATELLITE KITS 17 OLD TIME GAS Send 25 for5 RUBBER 3 NORDICfine instruments 1980 catalog9 COMPETITION GASsmall craft & aircraft design FUEL DT TIMERS -$1075 eachOur comprehensive catalog return F Al Model SupplyBox 1534 Southold NY Ei P0 BOX 3957TORRANCE CA 90510inc 11971 516 765196Oar interesting Speculate what kind per formances might obtained all-out legal FAT model Suppose example spindly toothpicky monster model utmost structural efficiency made instead fairly robust Also assume use carbon fibers Kevlar titanium samarium cobalt magnets lith ium batteries solar cells tough microfilm coverings Further make tandem wing maximum allowable arear course install lightweight electrostatic pitch stabilizer allow equal loading both surfaces Work improving specific fuel consumption fly still slower speed long might fly Two hundred hours seems possible far Capa bility non-stop San Francisco Boston flight would reasonable expectation matter would New York Paris flight would some very difficult logistics problems associated such attempts have absolutely no interest trying prove can stay awake longer somebody elseso Itm inclined try something easier like tuming electrostatically- stabilized machines loose upper end Grand Canyon terrain avoidance features stabilizer would automatically steer machine down valley70 Wetd launch Moab UTr hop jet HooverDam sit inabartellingflyingstories waiting machine arrive day later Another dream another time Acknowledgements officials observers provided valuable help encouragement during record flight also during preparatory test flights am very grateful patience humor hard work contributed Mr Charles Calvert Contest Director Mr Wayne Simpsonr Mr Jack Anglin timers Mssrs Michael DeMuth George Pickrell Glen Scillian official observers pilOtrs assistants Helpful advice about lubrication problems obtained Mr Don Lindley Amoco Research Laboratories Mr Ray Cramer provided useful consultations aerodynamics Valuable technical assistance contributed members District Columbia Radio Control Club DCRC particular Mr Ben Givens worked telemetry devices Messrs Melvin Newcomer William Charbonneau Robert Lee assisted design fabri cation electrostatic stabilizer other electronic units Mr Paul Nash granted use runways gliderport Brookeville MD facility valuable asset project Mrs Lillian Goldfinger Johns Hopkins Uni versity Applied Physics LabAPL made useful suggestions patiently typed badly scribbled drafts Dr Gordon Dugger APL edited improved original manuscript effot greatly appreciated References I Hill ML. Beat RuSsians Bust Model Airplane News Vol 72 No Feb 1965 p 28 2 Hill ML. 27000 Feet Its Catbird Country Fisning Models #406 Jan 1971 p 18 3 Hill ML. Shuffle Off Buffalo Model Air plane News Vol 73 No 2 Feb 1966 p 30 4 Hill ML. II l Hours Exciting Boredom Firing Models #390 Sept 1969 p 6 5 Hill M L Tonoise World Speed Record Model Elsing Models *359 Jan 1967 p 20 6 Hill ML. Bong Boomer World Record Soaring Glider Fisring Models #360 Feb 1967 p 9 7 Hill ML. Introducing Electrostatic Autopilots Astronautics Aeronautics Vol 10 No 1 Nov 1972 pp 22-31 8 Hill ML. Electrostatic Autopilot RC MOdelsrr Flying Models #431 Feb 1973 p 20 9 Hill ML. Design Performance Electro statically Stabilized Delta Planform Mini RPVs Con ference Proceedings Milirarsr Electronics Defense Ex position Wiesbaden Germany Oct 977 Injeravia SA Geneva Switzerland pp 847-861 10 Hill ML. Whyte TR. Weiss RO. Rubio R Isquierdo M.Use Atmospheric Electric Fields Vertical Stabilization Terrain Avoidancerr Pro ceedings ofAJAA Guidance & Control Conf Albu querque NM. August 19-21 1981 ATAA Paper *81-I 848-CP AMA Building/Mankowski Continued page 45 New Chaiter Members AMA Builders plaques recognizing $500 contributions Ilsis lnonth Free Flight Model Airplanc Association Southern California Northern Virginia Radio Control Inc Detroit Aero Modeler RCr tner Robert Reder Walter Hartung Contributing Members Honor Roll listing donations $100 up now included Sooner Circle Burners Kennebec Valley Mod el Avialors Twin City Radio Controllers Inc l-lightmasters Klamath Falls Cincin nati Aero Modelers San Gabriel Valley RC League WINGSr Tidewater RC Club Ever green Radio Modelers Association Monmouth Model Airplane Club Skylarks Sharon McDonnell-Douglas RC Club Memphis Prop Rusters Niagra County RC Club Sacramento RC Club Reno Radio Control Club Greater Cincinnati RC Arvada Associated Modelers Goodyear Model Aircraft Club Niagara Sun day l1rers Inc Pomona Valley Model Air plane ClObr Riverside RC Club again Alfred Twyla Lchmberg Robert Krafft Carl Otto Margaret Walinski John Williams John Grigg Ed Louise 146 Model Aviation PRC LRUflCH SYSTEMS Rugged Simplicity Top Performance Reasonable Price Oreect 5alee/ Ida MiddleMen/Hi-5taetoAle KitFoemftd Minute Aasewblv 7 Coerplete looteuctruce Included No special 71010 Regoreed / Seod SANE Fun Funhen lirfeematron Ordee List peodoots Total / Add S200 Skipping gend Menen aede Cheeb CreditCord Notetbet end Eep Data/COO Add 5150/ Aleska Add 5350 / Hawaii Will COO Shipping Mail ot Phone I Wiech OtiterePegeteet Adneeco Will COO Phone Orders Waloerne / Mail Order Phone Orders nS/ Welcome
Edition: Model Aviation - 1982/07
Page Numbers: 78, 79, 80, 81, 133, 134, 135, 142, 143, 146
NO OCR TEXT Victory brings out smiles faces tired crew after 20-hr flight near Brookeville MD September 21-22 1 gai DCRC members worked hard during preparatory flights well official attempt Left right Mike DeMuth pilots assistant Jack Anglin Wayne Simpson timers Maynard Hill pilot George Pickrell Charlie Calvert CD Glen Scillian assistant CD Secrets success revealed test took literally years planning new FAI Dura tion World Record just over 20 hours powered RC models pilot estab lished last Septem ber lot problems solved keep model airthat long man set record describes prob lems trials errors eventual success unique flying machine planes may seem ugly facts boxes dont try move too fast Mother Nature puts some beautiful useful curves invisible air flowing near Inside boxes Well New Faithfuls internals also lessthan-elegant appearance Wires springs fuel tubes lacing cords shock-mounted para phernalia tangled end end scene included few splotches dried blood deposited evidence elbows propellers dont mix Any way look machine beautiful accurate adjective something admirable about way models guts frame muscles operated produce desired performance Twenty-five explosions per second shook machine like being hit tympanists mallet mezzo-forte Cranks turned valves slid bearings twirled gears whined sparks zapped springs twanged pushrods rocker arms beat tickety-tack rhythm against drone vibrating drum-tight skins cacaphony compounded whooshing propeller piccolo-like whistle air rushing tiny carburetor Indoors trillions electrons shoved alternator through maze diodes chips chokes connector plugs rainbow-colored harness wires move motors gears July 198279 Truss structures false ribs holey main ribs balsa box fuel tank visible shot Fuselage bottoms wing tips andstab covered wIth white opaque MonoKote remainder translucent orange scheme viewed best compromise visibility night during day Lights located teardrop-shaped lenses wing tip under stab Dark patches wing tips copper tape Staticmaster ionizers used part electrostatic wing leveller Flywheel magneto look like ugly bulges aerodynamic penalty small linkages Incandescent lights glowed wing tip atmospheric ions also being interrogated get reports bank angle happened comfortable womb laboratory out Mother Natures soggy foggy bumpy atmosphere very gratifing experience coax machine through two million thumps missed beat project hobby venture extraneous authors profession deals development remotely-piloted vehicles goal fly long time approach keep simple schedule whenever ready motivation fun Some aeromodeling techniques equipment employed may practical interest responsible developing long-duration drones unmanned vehicles UVs com munication relays decoys surveillance elec tronic countermeasures other uses idea model airplane technology might used reduce cost operational military systems very popular early 70s mixed reviews its merits have cropped up because some goals expectations went out bounds Perhaps article will bolster fundamentally sound idea would gratifying result However inside out side secrets New Faithful will exposed primarily help modelers also perhaps steer few fun breaking records Features New Faithful crate-like appear ance New Faithful consequence FAI rule limits Scale models gross takeoffweight 5 kg 1102 lb Aerobatic racing models seldom approach limit Duration models restriction means way increase fuel capacity decrease structural weight Engine displacement limited 10cc 061 cu lifting surface areawing tail restricted l5m sq 1615 sq ft neither rules influenced design wing sized fit inside Toyota Hatchback although largest per missible engine installed normally loafed 80 Model Aviation Left Charlie Calvert CD congratulates Maynard Hill Lots things have changed since similar picture made Frank Ehling Hill Old Faithful September1904 Planes look alike bellies larger important valuable changes have brought hobby AMA Only 18000 members got black-and-white pamphlet 1964 AMA close trouble now iargest sport aviation organization world Modified 05 FS6O used New Faithful mounted horizontally vibration dampening Reworked 05 10 throttle used Text explains lubrication wear problems magneto-flywheel spark ignition system Warningread text about flywheel shape Vibration testing done hanging model coat hangers foam pads elastic lines running ceiling back porch Hill FlyBy Night Aircraft Co Tail tied spring-loaded storm door door opening used approximate prop thrust Fuel frothing servowear other problems can detected method author recommends forchainsaw-powered models New Faithful wentthrough continuous 50-hour run prior its first test flight along 20% full power model size configuration could probably climb Out gross weight 11 lb loaded maximum fuel would have potential flight 200hr duration 6400-km 4000-mi range FAIs technical rules sensible promote safety provide common basis world-wide comparison generate some tough challenges rule permits pilot handle radio controls however would have repealed Duration records much beyond present made possible Editor FAIModel Committee ClAM has agreed provide pilot relief during such record attempts Subject approval overall FAI Sporting Com mittee will effective 1983 Development airplane matter putting some old principles together func tional way Reliability obtained fixing changing things failed during hours testing approach solving problems always seek simpler principle rather add complicated parts key functional components shown structural drawing engine modified 05 FS6O FS means four-stroke Fuel fed carburetor tank wing Fuel flow rate pressure steadied inter dicting float chamber Herein lies reason droop snoot Gravity dependable pumps modified bicycle alternator connected engine power takeoff through 21 step-up gear train Electric power alternator rectified dc filtered choked RF delivered aft under stabilizer RC receiver servos set small 100 mAh nickel-cadmium batteries located batteries provide safe landing case engine failure alternator powers control equipment three tiny lights needed wing tips tail night flying Also wing tips Staticmaster ionization units used electro static autopilot senses vector electric field exists atmosphere thereb4 Jrovides automatic leveling wings l telemetry transmitter hangs its dipole antenna station forward electrostatic stabilizer shown another vital unit Kraft transmitter flight tied automobile battery Thats put fuel tank spin prop life thing sustains itself least 20 hours airframe Balsa wood bridge-truss structures efficient easy build Streamlining boxes would add weight worth category competition Most airframe made ofcontest grade balsa coveringis Top Flites MonoKate fuselage outer wing panels stabilizer white opaque remainder translucent orange combination chosen best compromise daytime nighttime visibility bridge-truss spar wing front member protrudes way promotes early Onset turbulence boundary layer Usually airplane designers try keep boundary layers laminar over first half wing chord slow-flying models its easy induce laminar boundary layer persist too far flow can separate easily rear portion airfoil separation occursand probably will bumpy air en counteredthe result can drag force consid erably larger associated tripped turbulent boundary layer tends stay attached fuel tank does double duty center wing spar assembly 1/16 00 e 00 OCo tii~n 332 v0r 322 t8t5 23 212334 25 2357 5 10 1112150 O Propellor 16 dia tO pitch O Magneto & flywheel 05F560 engine modified @ 0S10 carbureto, modified Cam housing rea power take-off Filler made-from chemists filter paper O Float chamber Flearbie coupling rubber auto fuel hosel Two utep op gear train Fleoible coupling tygon tuhiegi Bicycle alternator @ Rectifier filter 6J Filters mesh iretal 3 200 mesh nylon er paper 062 Fuei tank sump also main center spar Telemetry transmitter j Incandescent bulbSO ma @SV red & greee lenses Stattcmaster 2y 500 ionizer Grounded guard strip copper tapel Auxiliary collector copper tapel @ Electrostatic autopilot Same 16 white lens @ Throttle serno Elevator rudder servos Kraft KP7F receiner @ Battery pack 1100 maHi NEW FAITHFUL cture componBnt layout sheets contest grade balsa coated internally epoxy resins impervious gasoline polyester resin covered externally fuel discussed later failures can result single layer fiberglass i/a oz/sq yd impreg- additions nitromethane propylene oxide ether nated same resin Most polyester Continued page 133 July 198281 Super Mini Boy Recommended Eigines Radios- Mufflers Helicopter tools stock Worlds stable easiest fly small 40 size R/O Helicopter Low maintenance mechanics engineer ed Dieter Schiuter Father RIO Helicopters Features fully collective Bell mixing main rotor head upright spinner starting straight shaft driven tail rotor & automatic compensation symmet rical prebuilt main rotor tail rotor blades autorotation clutch Uses standard 4 chanel radio Kits parts stock guarantee helicopters fly Ask man flies Move up Schiuter inSifrp U SEAN IflG subsidiary MINIATURE AIRCRAFT 2594 North Orange Blossom Trail ndo FL 32804 Phone 30514224531 test fuselages six flight fuselages high-altitude version Ranger V- 12 seriously delayed XP-77 use low-altitude engine its performance would inferior fighter airplane comparison existing models now production ac cording USAAF Technical Report #5359 Vidal Research took over job building wings made schedule slip Problems arose over matters basic time needed spread glue Completion first airplane delayed February 1944 Marcfr would make almost 1 years late wasnt until April Fools Day 1944 XP-77 flew Bells Niagra Falls NY factory Success last Far proto type arrived Wright Field May 2 soon revealed serious vibration 1700 rpm 2300 rpm probably due lack shock absorbers engine mounts June 6 1944 Allied troops storming Nor mandy beaches final assault Nazi-held Europe USAAF got around giving prototype XP-77 its serial number 43-34915 Official flight tests carried out Eglin Field FL second XP-77 43-34916 starting late July 1944 October 2 airplane fell out Immelmann turn inverted spin pilot recovered air plane went upright flat spin could recover forced jump pilot landed safely airplane demolished proved last straw project ended December 2 March 1945 war drawing close Army Air Forces completed report Flight Tests Bell XP-77 Airplane following has excerpted general handling characteristics XP-77 airplane satisfactory although restric tions evented dives spins violent maneuvers jectionable feature control system fixed trim tabs ailerons rudder results condition flight airplane will fly stick- rudder-free ground setting the. tabs Visibility good conditions flight ground handling Noise vibration cockpit considerable cockpit becomes very cold uncomfortable cold weather high altitude cockpit heat available high speed 328 mph obtained military power 3150 rpm 416 mani fold pressure 12600 ft critical altitude high speed 330 mph obtained war emergencypower 3300 rpm and57 at4000 ft critical altitude maximum rate climb obtained war emergency power 3630 feet per minute critical altitude 2000 ft ConclusionsThe overall performance XP-77 airplane inferior present fighter aircraft employed AAF results flight tests considerably lower estimated performance set Bell Aircraft Corp maximum speed airplane war emergency power considerably lower other AAF interceptor aircraft operating military power maximum rate climb military power very low interceptor air craft low service ceiling airplane renders useless against high altitude aircraft bad XP-77 fell 90 mph short its promised top speed rate climb no better 200-hp Pins Special aerobatic biplane service ceiling 30000 ft era P-38s would go 39000 ft P 51s would top 40000 ft interesting idea didnt work taught its creators lesson very very difficult build truly lightweight fighter plane General Dynamics learning lesson over again its F- 16 no longer lightweight Mach 2 ter course doesnt make sense give up such worthy goal As matter fact start Cassutt will close 250 mph 135-hp weighing little over 500 lb add couple machine guns some fuel radio two ours/Hill Continued page 80 other useful ingredients avoid building wing spar might dis solve its contents during flight samples balsa coated variety resins placed baby food jars containing candidate fuels array samples stored months backyard greenhouse exposure thermal cycling solvents brutal test Some combinations looked satisfactory dur ing winter turned messes July Sig Mfg Cos polyester finishing resin eventually chosen K&B finishing resin fared equally well test Scale modelers using chainsaw engines might find idea useful Its OK gasoline havent found resins will resist fuels containing nitromethane ether Engine modifications OS F560 engine received designed use glow plug ignition regular alcohol-based model fuel Gasoline far efficient alcohol glow plug ignition doesnt work well gasoline based fuels unless compression ratio increased point mechanical problems July 1982 133 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS 444444444* **4ATYOURFINoERTIPS4444MAYU* * Watch For**SHOWED ALLOY PARTS WITH* ***NO ORGANIZER AT OVER FIFTY* *Upcoming Ktsl**OOLLARS THAN TWICEOUR* *** 495* ****************44444444*444444* HSA735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST 2-56 3 16 SOCKET HEAD CAP SCREW 2-56 1 4 SOCKET HEAD CAP SCREW 3-56 I 2 SOCKET HEAD CAP SCREW 4-40 I 4 SOCKET HEAD CAP SCREW 4-40 1 2 SOCKET HEAD CAP SCREW 4-40 34 SOCKET HEAD CAP SCREW 4-40 1 SOCKET HEAD CAP SCREW 6-32 1 4 SOCKET HEAD CAP SCREW 6-32 I 2 SOCKET HEAD CAP SCREW 6-32 34 SOCKET HEAD CAP SCREW 6-32 1 SOCKET HEAD CAP SCREW 6-32 l SOCKET HEAD CAP SCREW 6-32 2 SOCKET HEAD CAP SCREW FLAT WASHERS SAE ZINC PLATED 2 4 iii~ PCS 25 25 25 20 20 20 20 IS 15 IS 15 15 15 75 50 75 90 TOTAL PCS 735 5 NYLON INSERT LOCK NUTS ZINC PLATED 2-56 4-40 6-32 * * * **** ********************* KITS COME COMPLETE WITH 18 COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER ONLY $2495 NEW THE POWRWIr%IC4ANDTHE RETRIEVER POW RWINCH perfect casanion * $27500 RErRThVER Both units use special plus shipping 4pole permanent magnet lc* current drain less battery 12 volt nortor design also inCnrpor ates lighteeight heavy duty welded arKi painted steel frane features adjustable nvtor sounting plate insure proper drive tension PCM R b mater unlimited ttnnaters WINaS has handle either ,u anythirsg between rid pro tected font switch operation ed towline druis a-sstruction required anti-kiting braking can readily disengaged e Manual drun brake retrieval takeup antrol 2000 feet braided nylon line tCs riixn ball-beering swivel bearing turnaround hub RETR EVER will eliminate losing turn frequency because long turnaround tines retrieving lines Line orossings due wind shifts using multiple winches will longer probl40n Best 11 have launch-a-minute capability Other features incltxle e Drag-free operation due flycasting imde Battery cables heavy duty clips feet braided nylon line ball bearing swivel Guide line aligrinent takeup nEsie nd prevent line tangling drive shaft WRITE FOR MORE I14FO1L&flON 4DAVEY $22500SYSTEMS plusmFinE CORPORATION shippingONE WOOD LANEMALVERNPA19355 * INTRODUCTORY PRICE 1982 134 Model Aviation severe Furthermore fuel-air mixtures become extremely critical Sensitive temperature humidity changes toyed enough Such ideas reach conclusion spark ignition its heavy coils radio interference problems bound better method So magneto coil flywheel grass trimmer engine Lawn Boy part #06823-07 -08 mounted front housing flywheel originally round cut dumbbell shape reduce weight Warning Dont try dodge engine turns up usual 9000 rpm dumb bell will fly apart prove have paint can hole waste basket large bulge sand annulus between containers Some sand flew out top flywheel broke Taking fatigue account wouldnt trust thing above 5000 rpm Top speed engine 16 x 10 hand-carved propeller around 4500 rpm coil called solid-state magneto spark discharge triggered same magnetic flux energizes coil inner secrets device seem proprietary two important observations can made knowing exactly works 1 no points wear Out 2 generates milder form radio-frequency noise either point systems capacitance discharge systems RF noise can effectively suppressed putting 10K resistor series plug putting shield over high-tension lead Until about 1979 engines being massproduced hobby use two-stroke type until flight 1981 World Records Power categories estab lished such engines Although experi mented earlier homemade four-stroke engines have better fuel efficiency perfecting engine Duration takes lots spare parts no serious effort made use such design until OS FS6O appeared engine remarkably well built have run 400 hours bearings piston fit compression practically good new Some problems however showed up valve/rocker-arm/cam system partly because very little lubricant being used effort attain high fuel efficiency Valve clearances reset three hours after 24 hours pushrods too short permit further adjustment problem partially fixed weakening shortening valve springs replacing pushrods pieces Allen hexwrench material 5/64 across flats tips pushrods tips cam follower pins hardened heating microtorch about 16000F near orange glow quenchingwith water No annealing tempering done after quench Next valve-drive cam started wear problem mitigated adding oil fuel drilling small breather hole crank case aft cam Oil thereby blown through cam housing splattering oil made new black mess inside models nose now valve system good 50 hours between adjustments next problem Carbon build-up valves spark plug choked engine stop about 10 hours unless baby-sat gradually backed out needle valve reached old bag tricks polyisobutylene chemical used manufacture synthetic rubber viscous liquid does pretty good job lubricating metals instead producing carbon particles cracks mostly combustible hydrocarbon molecules heated Presto Very little carbon formed fuel efficiency increased composition fuel 93% premium grade Mail YOUr Order To* Please Include $250 postage HARDWARE SYSTEMS handling 42a WushingRon Ave S.* Add $150 COD Eden Prairie Mm. 55344* Minn realdenta add 5% sales tax * Orders will shipped within 48 Phone *129418757hours INDIAN CITY RADIO CONTROL CLUB Presents DETROIT EXPO IV Greater Michigan Modelers Show PLANES BOATS 0 CARS MANUFACTURERS STATIC DISPLAYS0 SWAP-SHOP October 123 1982 Eight Mile Artillery Armory Oak Park Michigan Info 6909 Monroe Blvd Taylor MI 48180 U U U I I I like world-taits actual-Sullivan Insta-Just Plstk Conoar Starter. ine Handles feel good tn serve Hook hand can adjus*t quick Dattery itll 38$ IJ-2 especially suiia$e inftaine Incredible ill fit sizes Grab hold starter can shake huNts 5suppliesup ds enginesand unleaded gasoline 7% polyisobutylene tedious work dealt carbure tor standard RC-type needle valve could have installed would have defied simpli city rule Besides hearing poor US FS6O very quiet engine Instead built-in means keeping fuel-air ratio constant throughout power range sought car buretor 15cc OS 10 engine adapted inlet manifold mercury ma nometer attached monitor inlet-manifold pressure fuel fed engine via float chamber 50cc graduated burette needle valve first adjusted lean smooth running full throttle periodic readings rpm manifold pressure fuel level burette number proportional fuel-air ratio calculated Additional sets data recorded lower throttle settings fuel-air ratio never came out constant stock carburetor Usually mixture became very rith low power peculiarly-shaped notch carburetor barrel needed notch shape found grinding little testing fuel-air ratio over whole rpm range grinding little testing again etc etc got right third carburetor fifth weekend during long procedure got absent-minded forgot propeller revving front Ouch Shake shake shake Eventually continuous hands-oft run 50 hours duration made run engine mounted aircraft suspended elastic lines allow entire flight-ready assembly vibrate airborne often hears builder new airplane exclaim flew right off drawing board effusion signifies bad consisted Kraft 533 FM receiver Ace Bantam Midget servos placed far aft reduce chances ignition noise would Continued page 142 July 1982 135 IL GRAB HOLD ly iii th Sri I I I I I I I I I I practice really ought hang up new model shake about 15 minutes per pound before trying fly Controls fuselage radio equipment V -NW yone Sec after 100 pm September 22 touchdown Open apace available landing model chose sit down cook tent PAl rules require landing within 500 meters launch point spot within 10 meters although embarrassing acceptable No damage iota fuel left tank wuniversai type ror encauseg cowls Thrse tail tubes suit engine position Seiect tail pipe remove others desired 0 Small Compact easy attach Tsil pipe extension Included AII mounting hardware clamps screws included THREE SIZES EM-I -19 . 1195 EM-2 -40.. 1295 EM-345.80. 1430 leading dealers available ORDER DIRECT Add 10% postage handling Calif residents add 6% tsi Check Cod accepted_Supply card number date ViSi_or MASTER CARD manifold fit scale model cowls TWo exhaust tubes allow maximum sxhaust removal less heating PITTS STYLE MUFFLERS OFor scale aircraft such PiflS CESSNA 150 Angied exhaust tubee exit bottom cowling OWorm drive mounting strap OTait pipe extensions -. mounting hardwan -1 cause jitter excessive current drain servos As turned out precaution really necessary because very effective shielding eventually installed nickel-cadmium batteries special Hi-Rate type obtained Ace Radio Control can withstand severe over charging no need voltage regulator telemetering unit sensed current flowing out batteries monotonous musical note ground-based receiver gave pleasant assurance well board Servo motions could detected superimposed buzz since charging cur rent changed engine rpm pitch tone indicated engine speed Interference glitching due weak signals could also detected presence scratchy noise ominous sound wasnt heard during record flight polyhedral wing minimizes spiral instability basic model fuel shifting side wing other during uncoordinated turns generates quite load rudder work pilot So electrostatic stabilizer78910 used automatic wing leveling total weight system 1 oz equal hours worth fuel good trade Devices type can also used stabilize pitch attitude feature omitted instance Instead long tail large stabilizer used simple expedient provided substantial margin inher ent pitch stability precluded potential troubles related servo wear extra current drain active pitch stabilization loop Practice practice practice trials work air bugs out system com ponents installed model made relics left over 1960s record attempts flights during dusk dawn periods airplane cannot seen very well neither dark enough see small red green white navigation lights electrostatic stabilizer found big help during periods well during night visual determina tion attitude airplane based solely orientation three tiny candescent bulbs planned flight altitude about 1500 ft above ground 2000 ft above sea level array closely spaced color contrast strongly discernible staring star-like wanderers amongst Orion other rocks heavens hypnotic effect mesmerized keyed-up senses limit three four hours However FAI rule states no assistant pilots allowed use control transmitter electrostatic stabilizer served very effectively towards over coming roadblock Instead having pay attention compensate spiral instability able close eyes relax chaise lounge momentarily pulse control stick hard over response verbal commands observers could staring relays So cat skinned pretested equipment transferred new airframe July 4 baptismal flight mid-August assembly tortured 75 hours ground 25 hours air confidence machine very high remaining task flying 20 hours official witnesses would call some truly dedicated people Exciting boredom what John Worth called during previous 1964 record flight Care taken pick helpers officials qualities included patience stam ina sense humor Weather loomed last barrier model strong enough withstand fairly severe turbu lence avoid unpredictable thunderstorms keep pilots work acceptable level seemed wise wait calm characteristic equinoctial highs convectively stable masses hot air frequently stagnate area during last half September Synoptic weather information sources watched signs usually precede favorable conditions September 12 1 3 great crew officials off Bealeton VA running DCRCs annual Scale competition Wouldnt know year series rapidly-moving cold fronts followed September 20 crew gathered under drizzling clouds went through test run official weighing launching timing procedures next afternoon occluded front stretched east-west Kansas City Philadelphia rain 100 miles north field decided see far could get though 15-mph wind southeast partial overcast gray strato cumulus clouds Usually such conditions get worse before get better Rain high winds expected unless front changed its direction record flight launch went off planned 5 pm sundown 730 pm clouds cleared wind dead calm ground obviously flow 1500 ft model sat nearly stationary its airspeed matching wind must have near 20 mph southeast 830 pm observer method working well clear star-laden sky Two artificial satellites seen about time boredom relieved philosophical 142 Model Aviation I I Plasticote Propeller OR LARGE new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER LIGHTER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 discussions inspired sightings couple old Sputnik jokes came out woodwork too like Hey did hear Russians put 10 cows orbit say its herd shot round world midnight observers practiced giving yaw pitch trim commands competing see could hold new constellation stationary longest period long times could mistaken star got little sleepy missed few commands stir attention George Pickrell jumped up onto box bellowed Holy cats three guys coming over hill camels Theres nothing like healthy guffaw keep party alive About 2 am heavy ground fog formed stayed through night never grew thicker about 75 ft Sideways visibility 50 ft would have no way accom plish safe landing engine failed Vertically navigation lights stars could seen through cone-shaped hole 5 am wind aloft shifted west Hooray front moving away visibility cone however diminished about 200 included angle Ground equipment crew blankets soaked dew tension building because never flown through very foggy dawn six pairs eyes two pairs field glasses made 9 am thermal convection winds about 10 mph ground level causing model bounce nighttime observer procedure abandoned 1030 husky bumps causing excessive currents electrostatic stabilizer system aid shut down 1 pm 3V3 hours past prior record airplane performing admirably telemetry saying everthings fine grumpy over one-pilot rule otherwise felt OK landing 500 meters launch would scrub record claim decided wed done enough pushed engine shutdown button gust blew airplane onto collision couse wifes shiny new Honda during final approach interest continued harmony no choice except pull up over car model ignominously impaled corner pole cook tent 10 meters launch point home nonetheless valid claim record Inferred results implications gross takeoff weight model 498kg 1096 lbs 173kg 61 oz fuel model landed little half 089kg3 oz fuel still tank Thus model has theoretical capability flight excess 40 hours models gas mileage figure 1500 mpg its estimated FAI legal range wind nearly 1000 miles fuel consumption rate 42 gm/hr 15 oz/hr impressively low no miraculous engine efficiency involved performance As evidence consider following points model flown about 25 mph through flight probably has liftto-drag ratio about 10 speed Assuming propeller efficiency about 05 specific fuel consumption can calculated about 103 lb/hp-hr rae about 10 times smaller what goes nto two-cycle engines alcohol still nearly twice some larger four-cycle engines used manned air craft Further improvements engine therefore theoretically possible would easily achieved small size Continued page 146 Its incredible heres true Epoxy Paint thats Pre-mixed 000 can! 0@ RITES BLACK AARON PueIPrc42 pa Tnt No pot life ixing proof Lightweight r tough a Flexible C@/ERITE 420 BABYLON ROAD/HORSHAM PA 19044 Model Ii S th I10 5O1 4O IJ Local Dealer Send $1 00 Catalog Juiy 1982 143 System Hi-Starts 101 Ceeaplet Nt-Seen Kit Mie AeceenEly 14 Pound Pull tOO Feet Sleet Surgical Late Continuous Piece Section Reel Line Chute Stoke Tow Rings Hardware elig240o 102 Coenplcee 2-Mete Hi-Stan Kit 5 Pound Pill hO Feet 1 4 inch Slack Late Reel Line Chute Stake HardwCrC Etc $1700 103 Splaoetet Tobeg Opees Cl. Type tOO Feet Slack Surgical Late. 14 lb Pull $1800 104 Seplaoeerel Tebing 2-Megee S lb Poll S 500 10$ Nylee Hi-Stan UeeTwitted S 326 55 lb Test White ColorStaided g42S 106 Steedeed Pereehot Sd Celee Tow SinS5 325 105 Reel SiC Poe Hi-Stan Oteok Wied-UpLarge $ BOO CeterpletO Teogh Pleohe HdweeSmall 5 450 System II Winch 111 Pro-Lasech Coerteat WieOtt Mb ho Keen Edge State 01 art comelernlc ready-to-use less hatternI 12 oclt nonahie winch ncudecwheelc handle motor tuct twIn h reel ritnarcund oIl electrical wiring lice chute Hock-nc hatterc end ccii readn Ic fly S2$$00 112 Pre-tasech Wktch Preen. Seal Tureeroced includes drilled Iroere reel turnarnundS cairo $15000 107 Winch Cleat 18 led Ojeeseter 230 lb Teet Heauc DuIn Tow Sing Connecting Ring $825 105 Wiech Line 2000 Cl Scaided Nylee $3 lbTeet$1500 Choice ci Pill Test White Colot 1 tS lb Test $2000 Top Ouclito Acailable Soacral 153 lb Test $2600 Orders Othet Listed 180 lb Test $3200 System III Power Pod 110 Powee Pod desigeed Ed Ceontghtl Icr 2-mole sci Iclaces lihergiacs huill- ecira tank allowS tO mint- engine run fur use OdS metal lank engines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 P011 IN 47454 ELECTRONIC SERVICENTER FACTORY AUTHORIZED WARRANTY SERVICE FOR KRAFT over 35 other manufacturers Cleaning adjustment nsmitter receiver up 4 servos $2500 plus parts 24 HOUR SERVICE74 ZOUR SERVICE NEAL WARREN ~c13 South 21st Street Sp Philadelphia PA 19103 Tel 215 564-0800 Mon-Fri 9AM-53OPM Wed night till 8PM Sat 9AM Noon KIT S 9 Hi GLIDERS 3 SATELLITE KITS 17 OLD TIME GAS Send 25 for5 RUBBER 3 NORDICfine instruments 1980 catalog9 COMPETITION GASsmall craft & aircraft design FUEL DT TIMERS -$1075 eachOur comprehensive catalog return F Al Model SupplyBox 1534 Southold NY Ei P0 BOX 3957TORRANCE CA 90510inc 11971 516 765196Oar interesting Speculate what kind per formances might obtained all-out legal FAT model Suppose example spindly toothpicky monster model utmost structural efficiency made instead fairly robust Also assume use carbon fibers Kevlar titanium samarium cobalt magnets lith ium batteries solar cells tough microfilm coverings Further make tandem wing maximum allowable arear course install lightweight electrostatic pitch stabilizer allow equal loading both surfaces Work improving specific fuel consumption fly still slower speed long might fly Two hundred hours seems possible far Capa bility non-stop San Francisco Boston flight would reasonable expectation matter would New York Paris flight would some very difficult logistics problems associated such attempts have absolutely no interest trying prove can stay awake longer somebody elseso Itm inclined try something easier like tuming electrostatically- stabilized machines loose upper end Grand Canyon terrain avoidance features stabilizer would automatically steer machine down valley70 Wetd launch Moab UTr hop jet HooverDam sit inabartellingflyingstories waiting machine arrive day later Another dream another time Acknowledgements officials observers provided valuable help encouragement during record flight also during preparatory test flights am very grateful patience humor hard work contributed Mr Charles Calvert Contest Director Mr Wayne Simpsonr Mr Jack Anglin timers Mssrs Michael DeMuth George Pickrell Glen Scillian official observers pilOtrs assistants Helpful advice about lubrication problems obtained Mr Don Lindley Amoco Research Laboratories Mr Ray Cramer provided useful consultations aerodynamics Valuable technical assistance contributed members District Columbia Radio Control Club DCRC particular Mr Ben Givens worked telemetry devices Messrs Melvin Newcomer William Charbonneau Robert Lee assisted design fabri cation electrostatic stabilizer other electronic units Mr Paul Nash granted use runways gliderport Brookeville MD facility valuable asset project Mrs Lillian Goldfinger Johns Hopkins Uni versity Applied Physics LabAPL made useful suggestions patiently typed badly scribbled drafts Dr Gordon Dugger APL edited improved original manuscript effot greatly appreciated References I Hill ML. Beat RuSsians Bust Model Airplane News Vol 72 No Feb 1965 p 28 2 Hill ML. 27000 Feet Its Catbird Country Fisning Models #406 Jan 1971 p 18 3 Hill ML. Shuffle Off Buffalo Model Air plane News Vol 73 No 2 Feb 1966 p 30 4 Hill ML. II l Hours Exciting Boredom Firing Models #390 Sept 1969 p 6 5 Hill M L Tonoise World Speed Record Model Elsing Models *359 Jan 1967 p 20 6 Hill ML. Bong Boomer World Record Soaring Glider Fisring Models #360 Feb 1967 p 9 7 Hill ML. Introducing Electrostatic Autopilots Astronautics Aeronautics Vol 10 No 1 Nov 1972 pp 22-31 8 Hill ML. Electrostatic Autopilot RC MOdelsrr Flying Models #431 Feb 1973 p 20 9 Hill ML. Design Performance Electro statically Stabilized Delta Planform Mini RPVs Con ference Proceedings Milirarsr Electronics Defense Ex position Wiesbaden Germany Oct 977 Injeravia SA Geneva Switzerland pp 847-861 10 Hill ML. Whyte TR. Weiss RO. Rubio R Isquierdo M.Use Atmospheric Electric Fields Vertical Stabilization Terrain Avoidancerr Pro ceedings ofAJAA Guidance & Control Conf Albu querque NM. August 19-21 1981 ATAA Paper *81-I 848-CP AMA Building/Mankowski Continued page 45 New Chaiter Members AMA Builders plaques recognizing $500 contributions Ilsis lnonth Free Flight Model Airplanc Association Southern California Northern Virginia Radio Control Inc Detroit Aero Modeler RCr tner Robert Reder Walter Hartung Contributing Members Honor Roll listing donations $100 up now included Sooner Circle Burners Kennebec Valley Mod el Avialors Twin City Radio Controllers Inc l-lightmasters Klamath Falls Cincin nati Aero Modelers San Gabriel Valley RC League WINGSr Tidewater RC Club Ever green Radio Modelers Association Monmouth Model Airplane Club Skylarks Sharon McDonnell-Douglas RC Club Memphis Prop Rusters Niagra County RC Club Sacramento RC Club Reno Radio Control Club Greater Cincinnati RC Arvada Associated Modelers Goodyear Model Aircraft Club Niagara Sun day l1rers Inc Pomona Valley Model Air plane ClObr Riverside RC Club again Alfred Twyla Lchmberg Robert Krafft Carl Otto Margaret Walinski John Williams John Grigg Ed Louise 146 Model Aviation PRC LRUflCH SYSTEMS Rugged Simplicity Top Performance Reasonable Price Oreect 5alee/ Ida MiddleMen/Hi-5taetoAle KitFoemftd Minute Aasewblv 7 Coerplete looteuctruce Included No special 71010 Regoreed / Seod SANE Fun Funhen lirfeematron Ordee List peodoots Total / Add S200 Skipping gend Menen aede Cheeb CreditCord Notetbet end Eep Data/COO Add 5150/ Aleska Add 5350 / Hawaii Will COO Shipping Mail ot Phone I Wiech OtiterePegeteet Adneeco Will COO Phone Orders Waloerne / Mail Order Phone Orders nS/ Welcome
Edition: Model Aviation - 1982/07
Page Numbers: 78, 79, 80, 81, 133, 134, 135, 142, 143, 146
NO OCR TEXT Victory brings out smiles faces tired crew after 20-hr flight near Brookeville MD September 21-22 1 gai DCRC members worked hard during preparatory flights well official attempt Left right Mike DeMuth pilots assistant Jack Anglin Wayne Simpson timers Maynard Hill pilot George Pickrell Charlie Calvert CD Glen Scillian assistant CD Secrets success revealed test took literally years planning new FAI Dura tion World Record just over 20 hours powered RC models pilot estab lished last Septem ber lot problems solved keep model airthat long man set record describes prob lems trials errors eventual success unique flying machine planes may seem ugly facts boxes dont try move too fast Mother Nature puts some beautiful useful curves invisible air flowing near Inside boxes Well New Faithfuls internals also lessthan-elegant appearance Wires springs fuel tubes lacing cords shock-mounted para phernalia tangled end end scene included few splotches dried blood deposited evidence elbows propellers dont mix Any way look machine beautiful accurate adjective something admirable about way models guts frame muscles operated produce desired performance Twenty-five explosions per second shook machine like being hit tympanists mallet mezzo-forte Cranks turned valves slid bearings twirled gears whined sparks zapped springs twanged pushrods rocker arms beat tickety-tack rhythm against drone vibrating drum-tight skins cacaphony compounded whooshing propeller piccolo-like whistle air rushing tiny carburetor Indoors trillions electrons shoved alternator through maze diodes chips chokes connector plugs rainbow-colored harness wires move motors gears July 198279 Truss structures false ribs holey main ribs balsa box fuel tank visible shot Fuselage bottoms wing tips andstab covered wIth white opaque MonoKote remainder translucent orange scheme viewed best compromise visibility night during day Lights located teardrop-shaped lenses wing tip under stab Dark patches wing tips copper tape Staticmaster ionizers used part electrostatic wing leveller Flywheel magneto look like ugly bulges aerodynamic penalty small linkages Incandescent lights glowed wing tip atmospheric ions also being interrogated get reports bank angle happened comfortable womb laboratory out Mother Natures soggy foggy bumpy atmosphere very gratifing experience coax machine through two million thumps missed beat project hobby venture extraneous authors profession deals development remotely-piloted vehicles goal fly long time approach keep simple schedule whenever ready motivation fun Some aeromodeling techniques equipment employed may practical interest responsible developing long-duration drones unmanned vehicles UVs com munication relays decoys surveillance elec tronic countermeasures other uses idea model airplane technology might used reduce cost operational military systems very popular early 70s mixed reviews its merits have cropped up because some goals expectations went out bounds Perhaps article will bolster fundamentally sound idea would gratifying result However inside out side secrets New Faithful will exposed primarily help modelers also perhaps steer few fun breaking records Features New Faithful crate-like appear ance New Faithful consequence FAI rule limits Scale models gross takeoffweight 5 kg 1102 lb Aerobatic racing models seldom approach limit Duration models restriction means way increase fuel capacity decrease structural weight Engine displacement limited 10cc 061 cu lifting surface areawing tail restricted l5m sq 1615 sq ft neither rules influenced design wing sized fit inside Toyota Hatchback although largest per missible engine installed normally loafed 80 Model Aviation Left Charlie Calvert CD congratulates Maynard Hill Lots things have changed since similar picture made Frank Ehling Hill Old Faithful September1904 Planes look alike bellies larger important valuable changes have brought hobby AMA Only 18000 members got black-and-white pamphlet 1964 AMA close trouble now iargest sport aviation organization world Modified 05 FS6O used New Faithful mounted horizontally vibration dampening Reworked 05 10 throttle used Text explains lubrication wear problems magneto-flywheel spark ignition system Warningread text about flywheel shape Vibration testing done hanging model coat hangers foam pads elastic lines running ceiling back porch Hill FlyBy Night Aircraft Co Tail tied spring-loaded storm door door opening used approximate prop thrust Fuel frothing servowear other problems can detected method author recommends forchainsaw-powered models New Faithful wentthrough continuous 50-hour run prior its first test flight along 20% full power model size configuration could probably climb Out gross weight 11 lb loaded maximum fuel would have potential flight 200hr duration 6400-km 4000-mi range FAIs technical rules sensible promote safety provide common basis world-wide comparison generate some tough challenges rule permits pilot handle radio controls however would have repealed Duration records much beyond present made possible Editor FAIModel Committee ClAM has agreed provide pilot relief during such record attempts Subject approval overall FAI Sporting Com mittee will effective 1983 Development airplane matter putting some old principles together func tional way Reliability obtained fixing changing things failed during hours testing approach solving problems always seek simpler principle rather add complicated parts key functional components shown structural drawing engine modified 05 FS6O FS means four-stroke Fuel fed carburetor tank wing Fuel flow rate pressure steadied inter dicting float chamber Herein lies reason droop snoot Gravity dependable pumps modified bicycle alternator connected engine power takeoff through 21 step-up gear train Electric power alternator rectified dc filtered choked RF delivered aft under stabilizer RC receiver servos set small 100 mAh nickel-cadmium batteries located batteries provide safe landing case engine failure alternator powers control equipment three tiny lights needed wing tips tail night flying Also wing tips Staticmaster ionization units used electro static autopilot senses vector electric field exists atmosphere thereb4 Jrovides automatic leveling wings l telemetry transmitter hangs its dipole antenna station forward electrostatic stabilizer shown another vital unit Kraft transmitter flight tied automobile battery Thats put fuel tank spin prop life thing sustains itself least 20 hours airframe Balsa wood bridge-truss structures efficient easy build Streamlining boxes would add weight worth category competition Most airframe made ofcontest grade balsa coveringis Top Flites MonoKate fuselage outer wing panels stabilizer white opaque remainder translucent orange combination chosen best compromise daytime nighttime visibility bridge-truss spar wing front member protrudes way promotes early Onset turbulence boundary layer Usually airplane designers try keep boundary layers laminar over first half wing chord slow-flying models its easy induce laminar boundary layer persist too far flow can separate easily rear portion airfoil separation occursand probably will bumpy air en counteredthe result can drag force consid erably larger associated tripped turbulent boundary layer tends stay attached fuel tank does double duty center wing spar assembly 1/16 00 e 00 OCo tii~n 332 v0r 322 t8t5 23 212334 25 2357 5 10 1112150 O Propellor 16 dia tO pitch O Magneto & flywheel 05F560 engine modified @ 0S10 carbureto, modified Cam housing rea power take-off Filler made-from chemists filter paper O Float chamber Flearbie coupling rubber auto fuel hosel Two utep op gear train Fleoible coupling tygon tuhiegi Bicycle alternator @ Rectifier filter 6J Filters mesh iretal 3 200 mesh nylon er paper 062 Fuei tank sump also main center spar Telemetry transmitter j Incandescent bulbSO ma @SV red & greee lenses Stattcmaster 2y 500 ionizer Grounded guard strip copper tapel Auxiliary collector copper tapel @ Electrostatic autopilot Same 16 white lens @ Throttle serno Elevator rudder servos Kraft KP7F receiner @ Battery pack 1100 maHi NEW FAITHFUL cture componBnt layout sheets contest grade balsa coated internally epoxy resins impervious gasoline polyester resin covered externally fuel discussed later failures can result single layer fiberglass i/a oz/sq yd impreg- additions nitromethane propylene oxide ether nated same resin Most polyester Continued page 133 July 198281 Super Mini Boy Recommended Eigines Radios- Mufflers Helicopter tools stock Worlds stable easiest fly small 40 size R/O Helicopter Low maintenance mechanics engineer ed Dieter Schiuter Father RIO Helicopters Features fully collective Bell mixing main rotor head upright spinner starting straight shaft driven tail rotor & automatic compensation symmet rical prebuilt main rotor tail rotor blades autorotation clutch Uses standard 4 chanel radio Kits parts stock guarantee helicopters fly Ask man flies Move up Schiuter inSifrp U SEAN IflG subsidiary MINIATURE AIRCRAFT 2594 North Orange Blossom Trail ndo FL 32804 Phone 30514224531 test fuselages six flight fuselages high-altitude version Ranger V- 12 seriously delayed XP-77 use low-altitude engine its performance would inferior fighter airplane comparison existing models now production ac cording USAAF Technical Report #5359 Vidal Research took over job building wings made schedule slip Problems arose over matters basic time needed spread glue Completion first airplane delayed February 1944 Marcfr would make almost 1 years late wasnt until April Fools Day 1944 XP-77 flew Bells Niagra Falls NY factory Success last Far proto type arrived Wright Field May 2 soon revealed serious vibration 1700 rpm 2300 rpm probably due lack shock absorbers engine mounts June 6 1944 Allied troops storming Nor mandy beaches final assault Nazi-held Europe USAAF got around giving prototype XP-77 its serial number 43-34915 Official flight tests carried out Eglin Field FL second XP-77 43-34916 starting late July 1944 October 2 airplane fell out Immelmann turn inverted spin pilot recovered air plane went upright flat spin could recover forced jump pilot landed safely airplane demolished proved last straw project ended December 2 March 1945 war drawing close Army Air Forces completed report Flight Tests Bell XP-77 Airplane following has excerpted general handling characteristics XP-77 airplane satisfactory although restric tions evented dives spins violent maneuvers jectionable feature control system fixed trim tabs ailerons rudder results condition flight airplane will fly stick- rudder-free ground setting the. tabs Visibility good conditions flight ground handling Noise vibration cockpit considerable cockpit becomes very cold uncomfortable cold weather high altitude cockpit heat available high speed 328 mph obtained military power 3150 rpm 416 mani fold pressure 12600 ft critical altitude high speed 330 mph obtained war emergencypower 3300 rpm and57 at4000 ft critical altitude maximum rate climb obtained war emergency power 3630 feet per minute critical altitude 2000 ft ConclusionsThe overall performance XP-77 airplane inferior present fighter aircraft employed AAF results flight tests considerably lower estimated performance set Bell Aircraft Corp maximum speed airplane war emergency power considerably lower other AAF interceptor aircraft operating military power maximum rate climb military power very low interceptor air craft low service ceiling airplane renders useless against high altitude aircraft bad XP-77 fell 90 mph short its promised top speed rate climb no better 200-hp Pins Special aerobatic biplane service ceiling 30000 ft era P-38s would go 39000 ft P 51s would top 40000 ft interesting idea didnt work taught its creators lesson very very difficult build truly lightweight fighter plane General Dynamics learning lesson over again its F- 16 no longer lightweight Mach 2 ter course doesnt make sense give up such worthy goal As matter fact start Cassutt will close 250 mph 135-hp weighing little over 500 lb add couple machine guns some fuel radio two ours/Hill Continued page 80 other useful ingredients avoid building wing spar might dis solve its contents during flight samples balsa coated variety resins placed baby food jars containing candidate fuels array samples stored months backyard greenhouse exposure thermal cycling solvents brutal test Some combinations looked satisfactory dur ing winter turned messes July Sig Mfg Cos polyester finishing resin eventually chosen K&B finishing resin fared equally well test Scale modelers using chainsaw engines might find idea useful Its OK gasoline havent found resins will resist fuels containing nitromethane ether Engine modifications OS F560 engine received designed use glow plug ignition regular alcohol-based model fuel Gasoline far efficient alcohol glow plug ignition doesnt work well gasoline based fuels unless compression ratio increased point mechanical problems July 1982 133 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS 444444444* **4ATYOURFINoERTIPS4444MAYU* * Watch For**SHOWED ALLOY PARTS WITH* ***NO ORGANIZER AT OVER FIFTY* *Upcoming Ktsl**OOLLARS THAN TWICEOUR* *** 495* ****************44444444*444444* HSA735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST 2-56 3 16 SOCKET HEAD CAP SCREW 2-56 1 4 SOCKET HEAD CAP SCREW 3-56 I 2 SOCKET HEAD CAP SCREW 4-40 I 4 SOCKET HEAD CAP SCREW 4-40 1 2 SOCKET HEAD CAP SCREW 4-40 34 SOCKET HEAD CAP SCREW 4-40 1 SOCKET HEAD CAP SCREW 6-32 1 4 SOCKET HEAD CAP SCREW 6-32 I 2 SOCKET HEAD CAP SCREW 6-32 34 SOCKET HEAD CAP SCREW 6-32 1 SOCKET HEAD CAP SCREW 6-32 l SOCKET HEAD CAP SCREW 6-32 2 SOCKET HEAD CAP SCREW FLAT WASHERS SAE ZINC PLATED 2 4 iii~ PCS 25 25 25 20 20 20 20 IS 15 IS 15 15 15 75 50 75 90 TOTAL PCS 735 5 NYLON INSERT LOCK NUTS ZINC PLATED 2-56 4-40 6-32 * * * **** ********************* KITS COME COMPLETE WITH 18 COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER ONLY $2495 NEW THE POWRWIr%IC4ANDTHE RETRIEVER POW RWINCH perfect casanion * $27500 RErRThVER Both units use special plus shipping 4pole permanent magnet lc* current drain less battery 12 volt nortor design also inCnrpor ates lighteeight heavy duty welded arKi painted steel frane features adjustable nvtor sounting plate insure proper drive tension PCM R b mater unlimited ttnnaters WINaS has handle either ,u anythirsg between rid pro tected font switch operation ed towline druis a-sstruction required anti-kiting braking can readily disengaged e Manual drun brake retrieval takeup antrol 2000 feet braided nylon line tCs riixn ball-beering swivel bearing turnaround hub RETR EVER will eliminate losing turn frequency because long turnaround tines retrieving lines Line orossings due wind shifts using multiple winches will longer probl40n Best 11 have launch-a-minute capability Other features incltxle e Drag-free operation due flycasting imde Battery cables heavy duty clips feet braided nylon line ball bearing swivel Guide line aligrinent takeup nEsie nd prevent line tangling drive shaft WRITE FOR MORE I14FO1L&flON 4DAVEY $22500SYSTEMS plusmFinE CORPORATION shippingONE WOOD LANEMALVERNPA19355 * INTRODUCTORY PRICE 1982 134 Model Aviation severe Furthermore fuel-air mixtures become extremely critical Sensitive temperature humidity changes toyed enough Such ideas reach conclusion spark ignition its heavy coils radio interference problems bound better method So magneto coil flywheel grass trimmer engine Lawn Boy part #06823-07 -08 mounted front housing flywheel originally round cut dumbbell shape reduce weight Warning Dont try dodge engine turns up usual 9000 rpm dumb bell will fly apart prove have paint can hole waste basket large bulge sand annulus between containers Some sand flew out top flywheel broke Taking fatigue account wouldnt trust thing above 5000 rpm Top speed engine 16 x 10 hand-carved propeller around 4500 rpm coil called solid-state magneto spark discharge triggered same magnetic flux energizes coil inner secrets device seem proprietary two important observations can made knowing exactly works 1 no points wear Out 2 generates milder form radio-frequency noise either point systems capacitance discharge systems RF noise can effectively suppressed putting 10K resistor series plug putting shield over high-tension lead Until about 1979 engines being massproduced hobby use two-stroke type until flight 1981 World Records Power categories estab lished such engines Although experi mented earlier homemade four-stroke engines have better fuel efficiency perfecting engine Duration takes lots spare parts no serious effort made use such design until OS FS6O appeared engine remarkably well built have run 400 hours bearings piston fit compression practically good new Some problems however showed up valve/rocker-arm/cam system partly because very little lubricant being used effort attain high fuel efficiency Valve clearances reset three hours after 24 hours pushrods too short permit further adjustment problem partially fixed weakening shortening valve springs replacing pushrods pieces Allen hexwrench material 5/64 across flats tips pushrods tips cam follower pins hardened heating microtorch about 16000F near orange glow quenchingwith water No annealing tempering done after quench Next valve-drive cam started wear problem mitigated adding oil fuel drilling small breather hole crank case aft cam Oil thereby blown through cam housing splattering oil made new black mess inside models nose now valve system good 50 hours between adjustments next problem Carbon build-up valves spark plug choked engine stop about 10 hours unless baby-sat gradually backed out needle valve reached old bag tricks polyisobutylene chemical used manufacture synthetic rubber viscous liquid does pretty good job lubricating metals instead producing carbon particles cracks mostly combustible hydrocarbon molecules heated Presto Very little carbon formed fuel efficiency increased composition fuel 93% premium grade Mail YOUr Order To* Please Include $250 postage HARDWARE SYSTEMS handling 42a WushingRon Ave S.* Add $150 COD Eden Prairie Mm. 55344* Minn realdenta add 5% sales tax * Orders will shipped within 48 Phone *129418757hours INDIAN CITY RADIO CONTROL CLUB Presents DETROIT EXPO IV Greater Michigan Modelers Show PLANES BOATS 0 CARS MANUFACTURERS STATIC DISPLAYS0 SWAP-SHOP October 123 1982 Eight Mile Artillery Armory Oak Park Michigan Info 6909 Monroe Blvd Taylor MI 48180 U U U I I I like world-taits actual-Sullivan Insta-Just Plstk Conoar Starter. ine Handles feel good tn serve Hook hand can adjus*t quick Dattery itll 38$ IJ-2 especially suiia$e inftaine Incredible ill fit sizes Grab hold starter can shake huNts 5suppliesup ds enginesand unleaded gasoline 7% polyisobutylene tedious work dealt carbure tor standard RC-type needle valve could have installed would have defied simpli city rule Besides hearing poor US FS6O very quiet engine Instead built-in means keeping fuel-air ratio constant throughout power range sought car buretor 15cc OS 10 engine adapted inlet manifold mercury ma nometer attached monitor inlet-manifold pressure fuel fed engine via float chamber 50cc graduated burette needle valve first adjusted lean smooth running full throttle periodic readings rpm manifold pressure fuel level burette number proportional fuel-air ratio calculated Additional sets data recorded lower throttle settings fuel-air ratio never came out constant stock carburetor Usually mixture became very rith low power peculiarly-shaped notch carburetor barrel needed notch shape found grinding little testing fuel-air ratio over whole rpm range grinding little testing again etc etc got right third carburetor fifth weekend during long procedure got absent-minded forgot propeller revving front Ouch Shake shake shake Eventually continuous hands-oft run 50 hours duration made run engine mounted aircraft suspended elastic lines allow entire flight-ready assembly vibrate airborne often hears builder new airplane exclaim flew right off drawing board effusion signifies bad consisted Kraft 533 FM receiver Ace Bantam Midget servos placed far aft reduce chances ignition noise would Continued page 142 July 1982 135 IL GRAB HOLD ly iii th Sri I I I I I I I I I I practice really ought hang up new model shake about 15 minutes per pound before trying fly Controls fuselage radio equipment V -NW yone Sec after 100 pm September 22 touchdown Open apace available landing model chose sit down cook tent PAl rules require landing within 500 meters launch point spot within 10 meters although embarrassing acceptable No damage iota fuel left tank wuniversai type ror encauseg cowls Thrse tail tubes suit engine position Seiect tail pipe remove others desired 0 Small Compact easy attach Tsil pipe extension Included AII mounting hardware clamps screws included THREE SIZES EM-I -19 . 1195 EM-2 -40.. 1295 EM-345.80. 1430 leading dealers available ORDER DIRECT Add 10% postage handling Calif residents add 6% tsi Check Cod accepted_Supply card number date ViSi_or MASTER CARD manifold fit scale model cowls TWo exhaust tubes allow maximum sxhaust removal less heating PITTS STYLE MUFFLERS OFor scale aircraft such PiflS CESSNA 150 Angied exhaust tubee exit bottom cowling OWorm drive mounting strap OTait pipe extensions -. mounting hardwan -1 cause jitter excessive current drain servos As turned out precaution really necessary because very effective shielding eventually installed nickel-cadmium batteries special Hi-Rate type obtained Ace Radio Control can withstand severe over charging no need voltage regulator telemetering unit sensed current flowing out batteries monotonous musical note ground-based receiver gave pleasant assurance well board Servo motions could detected superimposed buzz since charging cur rent changed engine rpm pitch tone indicated engine speed Interference glitching due weak signals could also detected presence scratchy noise ominous sound wasnt heard during record flight polyhedral wing minimizes spiral instability basic model fuel shifting side wing other during uncoordinated turns generates quite load rudder work pilot So electrostatic stabilizer78910 used automatic wing leveling total weight system 1 oz equal hours worth fuel good trade Devices type can also used stabilize pitch attitude feature omitted instance Instead long tail large stabilizer used simple expedient provided substantial margin inher ent pitch stability precluded potential troubles related servo wear extra current drain active pitch stabilization loop Practice practice practice trials work air bugs out system com ponents installed model made relics left over 1960s record attempts flights during dusk dawn periods airplane cannot seen very well neither dark enough see small red green white navigation lights electrostatic stabilizer found big help during periods well during night visual determina tion attitude airplane based solely orientation three tiny candescent bulbs planned flight altitude about 1500 ft above ground 2000 ft above sea level array closely spaced color contrast strongly discernible staring star-like wanderers amongst Orion other rocks heavens hypnotic effect mesmerized keyed-up senses limit three four hours However FAI rule states no assistant pilots allowed use control transmitter electrostatic stabilizer served very effectively towards over coming roadblock Instead having pay attention compensate spiral instability able close eyes relax chaise lounge momentarily pulse control stick hard over response verbal commands observers could staring relays So cat skinned pretested equipment transferred new airframe July 4 baptismal flight mid-August assembly tortured 75 hours ground 25 hours air confidence machine very high remaining task flying 20 hours official witnesses would call some truly dedicated people Exciting boredom what John Worth called during previous 1964 record flight Care taken pick helpers officials qualities included patience stam ina sense humor Weather loomed last barrier model strong enough withstand fairly severe turbu lence avoid unpredictable thunderstorms keep pilots work acceptable level seemed wise wait calm characteristic equinoctial highs convectively stable masses hot air frequently stagnate area during last half September Synoptic weather information sources watched signs usually precede favorable conditions September 12 1 3 great crew officials off Bealeton VA running DCRCs annual Scale competition Wouldnt know year series rapidly-moving cold fronts followed September 20 crew gathered under drizzling clouds went through test run official weighing launching timing procedures next afternoon occluded front stretched east-west Kansas City Philadelphia rain 100 miles north field decided see far could get though 15-mph wind southeast partial overcast gray strato cumulus clouds Usually such conditions get worse before get better Rain high winds expected unless front changed its direction record flight launch went off planned 5 pm sundown 730 pm clouds cleared wind dead calm ground obviously flow 1500 ft model sat nearly stationary its airspeed matching wind must have near 20 mph southeast 830 pm observer method working well clear star-laden sky Two artificial satellites seen about time boredom relieved philosophical 142 Model Aviation I I Plasticote Propeller OR LARGE new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER LIGHTER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 discussions inspired sightings couple old Sputnik jokes came out woodwork too like Hey did hear Russians put 10 cows orbit say its herd shot round world midnight observers practiced giving yaw pitch trim commands competing see could hold new constellation stationary longest period long times could mistaken star got little sleepy missed few commands stir attention George Pickrell jumped up onto box bellowed Holy cats three guys coming over hill camels Theres nothing like healthy guffaw keep party alive About 2 am heavy ground fog formed stayed through night never grew thicker about 75 ft Sideways visibility 50 ft would have no way accom plish safe landing engine failed Vertically navigation lights stars could seen through cone-shaped hole 5 am wind aloft shifted west Hooray front moving away visibility cone however diminished about 200 included angle Ground equipment crew blankets soaked dew tension building because never flown through very foggy dawn six pairs eyes two pairs field glasses made 9 am thermal convection winds about 10 mph ground level causing model bounce nighttime observer procedure abandoned 1030 husky bumps causing excessive currents electrostatic stabilizer system aid shut down 1 pm 3V3 hours past prior record airplane performing admirably telemetry saying everthings fine grumpy over one-pilot rule otherwise felt OK landing 500 meters launch would scrub record claim decided wed done enough pushed engine shutdown button gust blew airplane onto collision couse wifes shiny new Honda during final approach interest continued harmony no choice except pull up over car model ignominously impaled corner pole cook tent 10 meters launch point home nonetheless valid claim record Inferred results implications gross takeoff weight model 498kg 1096 lbs 173kg 61 oz fuel model landed little half 089kg3 oz fuel still tank Thus model has theoretical capability flight excess 40 hours models gas mileage figure 1500 mpg its estimated FAI legal range wind nearly 1000 miles fuel consumption rate 42 gm/hr 15 oz/hr impressively low no miraculous engine efficiency involved performance As evidence consider following points model flown about 25 mph through flight probably has liftto-drag ratio about 10 speed Assuming propeller efficiency about 05 specific fuel consumption can calculated about 103 lb/hp-hr rae about 10 times smaller what goes nto two-cycle engines alcohol still nearly twice some larger four-cycle engines used manned air craft Further improvements engine therefore theoretically possible would easily achieved small size Continued page 146 Its incredible heres true Epoxy Paint thats Pre-mixed 000 can! 0@ RITES BLACK AARON PueIPrc42 pa Tnt No pot life ixing proof Lightweight r tough a Flexible C@/ERITE 420 BABYLON ROAD/HORSHAM PA 19044 Model Ii S th I10 5O1 4O IJ Local Dealer Send $1 00 Catalog Juiy 1982 143 System Hi-Starts 101 Ceeaplet Nt-Seen Kit Mie AeceenEly 14 Pound Pull tOO Feet Sleet Surgical Late Continuous Piece Section Reel Line Chute Stoke Tow Rings Hardware elig240o 102 Coenplcee 2-Mete Hi-Stan Kit 5 Pound Pill hO Feet 1 4 inch Slack Late Reel Line Chute Stake HardwCrC Etc $1700 103 Splaoetet Tobeg Opees Cl. Type tOO Feet Slack Surgical Late. 14 lb Pull $1800 104 Seplaoeerel Tebing 2-Megee S lb Poll S 500 10$ Nylee Hi-Stan UeeTwitted S 326 55 lb Test White ColorStaided g42S 106 Steedeed Pereehot Sd Celee Tow SinS5 325 105 Reel SiC Poe Hi-Stan Oteok Wied-UpLarge $ BOO CeterpletO Teogh Pleohe HdweeSmall 5 450 System II Winch 111 Pro-Lasech Coerteat WieOtt Mb ho Keen Edge State 01 art comelernlc ready-to-use less hatternI 12 oclt nonahie winch ncudecwheelc handle motor tuct twIn h reel ritnarcund oIl electrical wiring lice chute Hock-nc hatterc end ccii readn Ic fly S2$$00 112 Pre-tasech Wktch Preen. Seal Tureeroced includes drilled Iroere reel turnarnundS cairo $15000 107 Winch Cleat 18 led Ojeeseter 230 lb Teet Heauc DuIn Tow Sing Connecting Ring $825 105 Wiech Line 2000 Cl Scaided Nylee $3 lbTeet$1500 Choice ci Pill Test White Colot 1 tS lb Test $2000 Top Ouclito Acailable Soacral 153 lb Test $2600 Orders Othet Listed 180 lb Test $3200 System III Power Pod 110 Powee Pod desigeed Ed Ceontghtl Icr 2-mole sci Iclaces lihergiacs huill- ecira tank allowS tO mint- engine run fur use OdS metal lank engines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 P011 IN 47454 ELECTRONIC SERVICENTER FACTORY AUTHORIZED WARRANTY SERVICE FOR KRAFT over 35 other manufacturers Cleaning adjustment nsmitter receiver up 4 servos $2500 plus parts 24 HOUR SERVICE74 ZOUR SERVICE NEAL WARREN ~c13 South 21st Street Sp Philadelphia PA 19103 Tel 215 564-0800 Mon-Fri 9AM-53OPM Wed night till 8PM Sat 9AM Noon KIT S 9 Hi GLIDERS 3 SATELLITE KITS 17 OLD TIME GAS Send 25 for5 RUBBER 3 NORDICfine instruments 1980 catalog9 COMPETITION GASsmall craft & aircraft design FUEL DT TIMERS -$1075 eachOur comprehensive catalog return F Al Model SupplyBox 1534 Southold NY Ei P0 BOX 3957TORRANCE CA 90510inc 11971 516 765196Oar interesting Speculate what kind per formances might obtained all-out legal FAT model Suppose example spindly toothpicky monster model utmost structural efficiency made instead fairly robust Also assume use carbon fibers Kevlar titanium samarium cobalt magnets lith ium batteries solar cells tough microfilm coverings Further make tandem wing maximum allowable arear course install lightweight electrostatic pitch stabilizer allow equal loading both surfaces Work improving specific fuel consumption fly still slower speed long might fly Two hundred hours seems possible far Capa bility non-stop San Francisco Boston flight would reasonable expectation matter would New York Paris flight would some very difficult logistics problems associated such attempts have absolutely no interest trying prove can stay awake longer somebody elseso Itm inclined try something easier like tuming electrostatically- stabilized machines loose upper end Grand Canyon terrain avoidance features stabilizer would automatically steer machine down valley70 Wetd launch Moab UTr hop jet HooverDam sit inabartellingflyingstories waiting machine arrive day later Another dream another time Acknowledgements officials observers provided valuable help encouragement during record flight also during preparatory test flights am very grateful patience humor hard work contributed Mr Charles Calvert Contest Director Mr Wayne Simpsonr Mr Jack Anglin timers Mssrs Michael DeMuth George Pickrell Glen Scillian official observers pilOtrs assistants Helpful advice about lubrication problems obtained Mr Don Lindley Amoco Research Laboratories Mr Ray Cramer provided useful consultations aerodynamics Valuable technical assistance contributed members District Columbia Radio Control Club DCRC particular Mr Ben Givens worked telemetry devices Messrs Melvin Newcomer William Charbonneau Robert Lee assisted design fabri cation electrostatic stabilizer other electronic units Mr Paul Nash granted use runways gliderport Brookeville MD facility valuable asset project Mrs Lillian Goldfinger Johns Hopkins Uni versity Applied Physics LabAPL made useful suggestions patiently typed badly scribbled drafts Dr Gordon Dugger APL edited improved original manuscript effot greatly appreciated References I Hill ML. Beat RuSsians Bust Model Airplane News Vol 72 No Feb 1965 p 28 2 Hill ML. 27000 Feet Its Catbird Country Fisning Models #406 Jan 1971 p 18 3 Hill ML. Shuffle Off Buffalo Model Air plane News Vol 73 No 2 Feb 1966 p 30 4 Hill ML. II l Hours Exciting Boredom Firing Models #390 Sept 1969 p 6 5 Hill M L Tonoise World Speed Record Model Elsing Models *359 Jan 1967 p 20 6 Hill ML. Bong Boomer World Record Soaring Glider Fisring Models #360 Feb 1967 p 9 7 Hill ML. Introducing Electrostatic Autopilots Astronautics Aeronautics Vol 10 No 1 Nov 1972 pp 22-31 8 Hill ML. Electrostatic Autopilot RC MOdelsrr Flying Models #431 Feb 1973 p 20 9 Hill ML. Design Performance Electro statically Stabilized Delta Planform Mini RPVs Con ference Proceedings Milirarsr Electronics Defense Ex position Wiesbaden Germany Oct 977 Injeravia SA Geneva Switzerland pp 847-861 10 Hill ML. Whyte TR. Weiss RO. Rubio R Isquierdo M.Use Atmospheric Electric Fields Vertical Stabilization Terrain Avoidancerr Pro ceedings ofAJAA Guidance & Control Conf Albu querque NM. August 19-21 1981 ATAA Paper *81-I 848-CP AMA Building/Mankowski Continued page 45 New Chaiter Members AMA Builders plaques recognizing $500 contributions Ilsis lnonth Free Flight Model Airplanc Association Southern California Northern Virginia Radio Control Inc Detroit Aero Modeler RCr tner Robert Reder Walter Hartung Contributing Members Honor Roll listing donations $100 up now included Sooner Circle Burners Kennebec Valley Mod el Avialors Twin City Radio Controllers Inc l-lightmasters Klamath Falls Cincin nati Aero Modelers San Gabriel Valley RC League WINGSr Tidewater RC Club Ever green Radio Modelers Association Monmouth Model Airplane Club Skylarks Sharon McDonnell-Douglas RC Club Memphis Prop Rusters Niagra County RC Club Sacramento RC Club Reno Radio Control Club Greater Cincinnati RC Arvada Associated Modelers Goodyear Model Aircraft Club Niagara Sun day l1rers Inc Pomona Valley Model Air plane ClObr Riverside RC Club again Alfred Twyla Lchmberg Robert Krafft Carl Otto Margaret Walinski John Williams John Grigg Ed Louise 146 Model Aviation PRC LRUflCH SYSTEMS Rugged Simplicity Top Performance Reasonable Price Oreect 5alee/ Ida MiddleMen/Hi-5taetoAle KitFoemftd Minute Aasewblv 7 Coerplete looteuctruce Included No special 71010 Regoreed / Seod SANE Fun Funhen lirfeematron Ordee List peodoots Total / Add S200 Skipping gend Menen aede Cheeb CreditCord Notetbet end Eep Data/COO Add 5150/ Aleska Add 5350 / Hawaii Will COO Shipping Mail ot Phone I Wiech OtiterePegeteet Adneeco Will COO Phone Orders Waloerne / Mail Order Phone Orders nS/ Welcome