THE INFAMOUS Peace Ladies camped outsi4e Greenham Common Air Base England did seem too perturbed few score modelers cars lined-up enter main gate thing nearest re semblance Cruise missile motley assortment RC models packed rear some vehicles However cars model eyes least just revolutionary sophisti cated missile destined make historythough modeling history Sunday February 27 1983 day scheduled maiden flight RC model fitted genuine gas turbine jet engine true British tradition day cold wet windy following description efforts Gerry Jackman team produce practical model jet turbine engine gives some insight dedication small years mod elers have dreamed jet engine power true manner full-size airplanes wasnt until last March best knowledge someone actually flew RC model powered gas turbine en gine author pro vides first-hand account flight some background con cerning engines development U David Boddington 88 Model Aviation Top Designed Barry Beicher Bar-Jay successfully flown under power minia ture gas turbine let engine developed Gelry Jackmans team Flying weight around 16 lb Landing gear fixed prototype though future versions will include retracts Design includes twin booms high-mounted horizontal tail surfaces clear engines powerful jet blast Above victorious team Gerry Jackman center hard working assist ants L-R David Stitch Barry Baicher Jackman Chris White Ray Carter obscured group people prepared abandon project face setbacks frustrations disappointments Despite admonitions what attempting impossible realization various times throughout development period detractors might well right persisted plans stage dreams became reality past 35 years have arti cles written modeling magazines about model gas turbine enginessome purely theoretical others purporting based practical experiences few contributors have honest enough admit efforts crowned suc cess producing engine useful output experiments exciting Less forthright contributors tended give impression gas turbine engines built successfully run fitted flown models individual gall otfer plans instructions working jet turbine engineno working examples have seen date No photographic corroborative evidence presented prove RC model aircraft flown under power genuine gas turbine engine first pure jet aircraft flew 1939 Heinkel 178 Frank Whittle already carrying out test runs jet engine two years 1930 Whittle first took out patent form propulsion Perhaps surprising nearly 50 years after original design full-size gas turbine aircraft engine just reaching stage developing equivalent model size look few considerations involved pro ducing such engine will soon give insight goal has eluded engineers modelers long form jet engine has found favor modelers has pulsejet have us since 1950s Pulse-jets have big advantage have minimum working partsjust reed flap valves front combustion chamber Air introduced through valves mixed fuel mixture ignited spark plug After corn bustion completed gasses have expelled high velocity via tail pipe partial vacaum created com bustion chamber cycle repeated frequency pulses governed design shape combustion area tail pipe simple pulse-jet unfortunately ideal answer Scale modelers prayer jet engine Starting requires high-pressure blast air intake throttling qualities virtually zero noise levels sufficient put selfMounting brackets made aluminum alloy designed permit rapid removal engine inspection testing top engine fuel line returning preheating area carburetor Rear pipe temperature checked before putting cowl flight December 1983 89 engine revealed see course critical parts inside air inlet moulding fiberglass/epoxy engine cowling Bar-Jay fuselage Test sockets provided engine ground-monitoring compressor speeds tail pipe tempera ture Liquid propane fuel preheated beforeentering engine via twin fuel lines Cylindrical oil supply reservoir lubricate bearings situated just behind RC gear rear oil reservoir just visible airborne propane fuel tank holds enough about six minutes fliqht time ohotos author respecting heavy rock band shame Worse still sound doesnt resemble full-size jetexcept dreaded V-I flying bomb essential difference between ram jet pulse-jets ajet turbine engine latter uses compressor multi-stage axial compressors draw air com bustion chamber compress rotate compressor unit turbine wheel fitted common shaft gasses com bustion chamber pass through turbine blades turn complete compressor turbine assembly Part energy ab sorbed turbine remainder pro vides propulsive thrust jet engines based fundamental law physics states action equal reaction Combustion gasses expelled much higher velocity result compression heating combustion intake air velocity producing thrust big problems producing miniature jet turbine engine operating temperatures will region 6000C Another shaft speed compressor/turbine assembly may ap proaching 100000 rpm obtain workable thrust levels degree technological expertise required fields metal lurgy thermodynamics engineering considerable expanding team Gerry Jackman originator project decided build ajet turbine engine given little encouragement colleagues con sidered him loser Only determination obvious will succeed encouraged fel low modelers offer assistance Grad ually over past eight years strength team has increased inclusion specialist knowledge various facets technical design engi neering First offer services Barry Belcher aerodynamicist has responsible design Bar-Jay model used testbed latest en gine Barry also responsible major breakthrough designed revised turbine blade section improving static Continued page 174 90 Model Aviation Left The compressor blades can seen top right Underneath wing fillet tuel till overflow vents forward gear fitted abrasion brake acting tire Right View partial rear shows good fits expects well thought out design reservoir oil lubricate front rear shaft bearings engine can seen clearly picture well throttle servo Has four-channel Futaba controls trs . Ray Carter about connect propane fuel hose models fitting front model high-speed starter 24V motor geared turn up about 30000 rpm THIS FUEL FEATURES ORUST PREVENTION AGENTS ODETERGENTS OLUBRICAllON WITH HIGH FLASH POINTS sWElliNG AGENTS FOR MORE EFFICIENT AND DEPENDABLE RJEL FLOW OANTI-FOAMING AGENTS TO PREVENT LEAN RUNS KEEPS YOUR ENGINE RUNNING COOL sAN ODORLESS HIGHLY REFINED FUEL CHILDPROOF LIDS Available FAI 5 10 15 25 & AO% NiITo-Methane Contents Formulated synthetic lubriconts Also available castor DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT This competition fuel tast becoming THE CHOICE top profesionols first cash product Contact us price structures ordering information Manufacturers Major Brand Distributors Model Engines Kits Radios Accessories SUPER K Fuels brand KiNGS RADIO CONTROL HOBBIES INTERNATIONAL 3960 West 46 Ave Hialeah Florida 33042 305 557-2024 cross-grain tips rudders etc harder wood better grain should laid out run same direc tion span wing Make own plans Keep sketching top view until suitable draw side view along front tail views same scale Trace final top view onto selected board carbon paper below plan Redraw board ball-point pen dark pencil permanent imprint wood has inter esting grains along board might want select spot fall midfuselage location grain patterns finished wing will same both sides lucky can find boards swirls fall identically both wing halves Cut outline top view first want square sides top bottom board Once rough cut complete cut outside line allow errors sawcut bungles Dremel trim sand lines Next draw side views -in edge sim ply start carving until have removed excess wood down will file grind away remainder finished surfaces use No 50 production paper sand first smooth outline after filing done go No 120 followed final sanding No 220 wet-or-dry A-weight paper Dont strive too much detail unless expert finish can either natural wood makes fine model enjoy can make glossy spraying three coats Krylon Clear sanding No 220 wet-or-dry between coats have add rigging youll probably drilling holes Use nylon thread Mark location hole sharp pin wobble pin make starting place drill Drill handturning chuck power-drill could slip destroy few hours work almost impossible remove damaged areas sanding because wings already very thin case Whitehead 1901 No 21 carving Whitehead 1905 hang gliders nine-rib five-rib types rigging piece thread continuous pattern struts landing gear frame work pilot hang find popsicle sticks wooden forks French fries quite useful having strong grains structural needs Years age perhaps centuries Euro peans could afford fancy blown-glass ornaments Christmas trees make made orna ments curly shavings off car penters planewith much artistic imagination some glue SAFE FLYING IS NO ACCIDENT ornaments often accompanied other clevet attractive pieces such crib made nut shells infant figure bedded scraps cloth colors Animals skiing Santas host other wonderful wooden ornaments grew popularity exported over world Most made Germany Alps Copies now guessed made Hong Kong Airplane ornaments some thing can make enjoy Turbine/Boddington Continued oaae 90 thrust engine 20% Following turbine failure earlier enginesa traumatic cata strophic event served emphasize compiexitles dangers project Ray Carter brought work stress calculations engineering design Since time have no similar failures Ray has able advise special welding techniques pressed steel work prepare technical drawings recurring problem early engines failure rate shaft bearings speeds temperatures involved bearings would survive matter minutes full operating power Failures due partly high temperatures speeds serious contributing factor shafts whirlthe whipping oscil lation over unsupported length about 6 David Sitch bearings con sultant able advise cor rect selection bearings obtain combat shaft whirl correlation compressor design combustion chamber heat output nozzle ring turbine blade angle settings paramount importance efficient output small gas turbine engine points critical model-sized engines commercial-sized units efficiencies will result power outputs too low practical purposes Thermodynamic design considerations became responsibility Chris White has constantly striving refine design engine improve thermal efficiency produce useful thrust current development work aimed producing superior tail pipe design Whereas model aircraft can usually designed built will fly straight off building board no easy straightforward solutions constructing miniature gas turbine engine Gerry Jackman has phlegmatic tenacious personality freely admits eight years development have number occasions prospect eventual success appeared very remote Without support strong backup team proj ect may have faltered crisis suc ceeded another seemingly impassable complication have triumphed others have failed because have refused beaten have collective faith see job through end 174 Model Aviation specially formulated chemically balanced fuel top performance minimum engine wear weather condition PRODUCTS FOA~ Complete Line Exhaust Systems * Tuned Pipes led Tuned Pines * Headers * Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpassed WokmanshiD & Performance mtcfled Performance ystem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMERK&B SUPER POSY PAINT K&B MIXING CLIPS opinion no reason com mercial firm could have produced prac tical working jet turbine engine modelersprovided prepared invest thousands dollars de velopment experimental work Theirs has solo effort have received no assistance advice manufacturers designers full-size turbojet engines has amateurism highest pro fessional standards Design construction data view proprietary nature miniature gas turbine engine would unfair give detailed information design con struction unit After thousands hours research development work team naturally hopes recoup some re ward its efforts following brief comments will provide idea meth ods employed considerable technical barriers overcome Nimonic alloys stainless steel principal metals used construction engine Correct selection metals allow complimentary rates expansion closely-mating components vitally impor tant Equally important metals capable withstanding high stresses cer tain components tip speed com pressor 1100 ft per second high temperatures compressor ma chined high-quality duralumin dropforged material would have preferable couldnt easily obtained small quantity needed development prototypes Early attempts producing turbine wheel totally successful previ ously explained eventually nec essary construct special spark-eroding machine manufacture item tur bine takes 130 hours machining erod ing fumes dielectric fluid dur ing eroding process pretty obnoxious despite being perfumed Balancing compressor/turbine rotor has ultra pre cise rebalancing has carried out time bearing replaced Close-tolerance machining obviously needed project sophisticated gas MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler holiday season Standing 51/2 inches tall large 10 oz capacity its real attention getter definite colector piece years come ORDER NOW FOR THE HOLIDAYS ONLY $695 ER PLUS $200 POSTAGE & HANDLING PER ORDER RJL INDUSTRIES OX 5654 DENA CA 91107 795-9821 TAN COLORED OVEN GLAZED LIMITED PRODUCTION turbine engine work carried out Myford Super 7 lathe mod est commercial standards small mill ing machine typical power hand tools would expect find modelers well-stocked workshop present engine has tested over past 12 months concentrating initially obtaining reliable running im proving thrust levels Propane gas used bench running proved very suitable fuel engine fit ted model change made liquid propane storage vessel propane gas form too large bonus injecting liquid propane combustion chamber increased thermal efficiency engine disadvantage became difficult accurately meter fuel supply Rear bearings now survive accept able period proving team has able select correct bearings obtain reasonable operating temperatures rear end rotor shaft Temperature readings various points engine have monitored throughout test period Indeed total development has logical planned throughout eight years experimentation Temptations bolt unit temporary airframejust see whether would flyhave re sisted whole project has pro fessionally handled Good throttling respone feature engine although aircraft response power changes slow compared propeller-driven aircraft Shaft speeds 80-85000 rpm maximum result static thrusts 7 8 lb jet pipe tem peratures region 600-6500C comparison average internal combustion engine seems pretty pedestrian Greenbam Common debut Waiting rain cease least gave oppor tunity chatting Gerry Jackman before maiden flight attempted seemed remarkably relaxed com posed view circumstances wish get engine started aim model down runway watch make sky assured would make previous struggles 176 Model Aviation b p ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX A&A Industries AMA Membership Ace RC Inc Aero Tech RC . Air Tech Airtronics Phase Art ec Products Inc Americas Hobby Center b&r Hobbies Balsa USA Bavarian Precision Products Dave Brown Products Buckeye Balsa Buzzard Aircraft Byron Originals California Model Imports lina-Taffinder1 11 Johnnie Casburn Mfg27 Chevron153 Circus Hobbies86-87 Cleveland Model & Supply Co166 Condor Hobbies47 Consumers Guide RC Aircraft Prod. 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Mt * *SAILPLANE* * launching equipment hi-starts/winches/accessories complete line/best pricesltop quality send self-addressed stamped envelope catalog/information RLF PRODUCTS R3 Box 178-Y PaoIi IN 47454812123-4310 impending darkness ____________________________________________________________[v32][b1588152171700]] say failure get model airborne disappointment spec tators stating obvious team __________________________________________________________must have devastating confidence venture would suc cess thwarted last No 426 China Clipper$2000minute RC Fantastic Sport Scale flying boat four 10-size engines 4-channel RO Three sheets no documentation Spans 74 in The sweet smell success tt did take No 427 Profiles$200long Gerry crew overcome FF Travelair Mystery Ship Miss Los Angeles profile all-balsa rubber mod- temporary setback soon els sport flying Wingspans 17 investigating reasons erratic runNo 428 Bearcat$525ning engine worked perfectly CL Big competition-caliber profile Precision Aerobatics plane 60 power on bench conclusion came No 131Gee Bee Modei Y 40-powered BC stand-off scale Ifre great old-tone racers$500 No 193Slillelto CL Stunt model McDonald winner 19761980 1982 FAI World champs$375was liquid propane fully No 225Ole Reliable BC 70 version 3ff old-toner REM controls 19-25$425 No 239Blue Beds RC Ken Willares formation plane 4-rh 10 vaporizing combustion chamber No 262Crasimusslee CL Crash-proof trainer 2 srzes 15-30 36-40$125secondary combustion taking place No262Gee Bee RC Granger Withams magnifrcent Model Z 40 engine$750 No291Csp2O dOpowered scale BC French aerohaff C plane Low wing tail-dragger2 sheetssothe jet pipe cure fuel feed line No269Gee Bee Sr Spoelsten RC t/4-scale Hafffte 91 finwer Prototype 5P 1175was taken around tail pipe preheat No 302Mini P18 FE Sarpolus 049 ducted fan sport f 2-rh Balsa wings tad tone strudore$275 No 3101930 Fleet Biplane RC Sport Orate icr 35-40 4-rh Wingspan 56 1/6 scale Two sheets$625fuel before injected com $375 No 314*e B BC Ken Wrflards flying boat 3-rh. 15-Power Ft7 wtttl rrtttoraltle ~bustion chambers Excessive pressure No326Tayice Cult PC Don Stolts schordyard-Scale 049s 2-2 CS Spans 50 te No 332Zepmye BC Soraif 2-rh glider br hand-launch tow thennid stope soadng$200 No 343Wasp Vi FF Mike Stoys Hats-winning Orddonr HEG$100built up fuel line first experi No348one RcTramerhasoeryforgfongffytnggsidtses3-dr 10-25power-$425ments further modifications showed No 354Menbyn FE Giant 155-in span Sadfdane uses 3 RC channels$750 No 358 Pieces FF Indoor Easy B RaSher-power contest-winner W Van Gorder$100greater promise No 362Supeecat BC Haff-APyfon Racer/sport ffmr aileron idevator control Foam sing -$200 meantime decided next sNo 365Seemastee BC Wtllards 40-size ttying boat 4-rh Strap-on gear fandplanet 2 shts-$1100 No 368space Shuttle B FE targer improved version Boo glider 3-rh$550outing would carry out extended No 370CAP21 BC GiantSrale French aerohatic craft spans 71/4 9 Quadra power 2 sheets dec$1400 278Me Spout U FE Fly Sport Pyfon NoviSportsman Paoern sheet sport Uses 4-dr 25-40 pwr$500taxi trials before attempting fly model oNo 379 m Spg Cf t Coorhat stdp large Ight super pertoniter-The throttle opening fixed give CJNo 383CaUsto 93 FE Fly sleek Nato mowing Salt plane AMA Mod tad thrfemfed classes-$750 o No366Laser 260 FE Sport Scale rephca 01 rhantyfooship Aerohafic flier uses 40 power 4-5dr 2sf9s$1075upper operating limit 60000 rpmwell No366US Mate BC I-loge gentle-lIving Styfane trainer sport Spans BOrn 00 errgsre 3-rh Tee shts-$1400 No 382Ciwisfiaphen FE Sport Scale porarhotist Two-dr set tories torso moves anon 425below maximum speed avail-No 383A Kioud King BC Reduced modernized verston 193ff design t2A Old-tatter 2cr 3dr-able No 294Ron Crow FF High-performance Quidoor Hand Launched Glider -$175 orNo386 yB CL t2A Racer lot MooseorScale Plans shewCoBtack Widow Spans 182/4 mV-tad$175 further trip Greenham Common Air aNo 396Lee-Rictueds FF Eledno-powered 020 Scale ring-sing oldie .$350 No398 flflcriarger Fouruhfa dnc$2225Base kind permission CO No396Zephyr 1100 FE AMA Ctoss B Sadplane 3-channel BC gear.made Again weather poor o No 401Royal Lancer FF Basic competitron wodid icr AMA Ctass uses stasdard-pertcrrttanre 15 engines $550 Z 0No 403Cub Ficalpiane BC Sport Scale tar OAg-tO-stce engines 4-dr BC J3 ffoats sa clanror$600time less critical - No 404Focke-Wuff 100 CL Proffie Scale tp.A power ieatarea anique engine mount icr erote reaienn$300 No405RegenflOnotOueSklesFEFuntopobiptarefor4060Power4-~f2ch -$1350only taxiing Gerry quite happy No 406Piper Coerancle CL Sport Scale uses 2Ss firroftle control 2 sheets$625 No407BoelngXFS8-l RCSpooScaiefori2Apower2-3drannelsgeneral ground handling qualities $600model decided give faster run a- taNo 406 ReVoff-Er BC elertuc power sport filer 2-chaneef 05 motor .. No409 Folikee Spin 16 PP Scale ot early monoplane trainer 049 power Three sheets plus dertallentatiotl- $825 410 pobee Plate BC Scale famous EAA plane 40-power 4-dr Bainid sport t$1200Acceleration considerably rapid $825 ~ Stunterbalndoor ~uh0rt lines $175than anyone predicted found No413 BonanasCLPtOStetonscaleStunterforlSto 25 engines PC scated-ap 1939 totter power tavonte $325 himself position having make No 414 Etecttic Sperimy BC ideduc powered ton tlmr 05 motor0000 reNo415 NawimerlkarrlceneNkl FEElectncpowerSportSraietort5mofcr3-4cham$1175instant decision Flying speed being 6 Stuntfire 60 CL Big 62-in-span Stonter 80-power - reached either engine shut 17 Spoetwagon JR BC Pulse-rudder uportsfer 02-power $300 No 418 Luton Minor BC Sport Scale model t930s Bn5sh Sgfintptane Icr 19-power 4-draminof PC $725 down flight made No 419 Dove 650 CL Coropetitien Stonter ior 40-46 power has foam wing slab $700 No426 Buck600FFCotllpe6tleOCtas5AorBfcrto-2t powerHassatialtle-arrtdettcetadVtT $600 Being man conviction faith No 421 Annes Plane CL WA traeter/sporfsfer rugged balsa faul-Suinlang Gerry e 9No422 Scooter tiC Two-Meter Saddarte has won Hats eveot 1992 t9fl3 plan Other contests$550ased back elevator stick No422 Cloud Cruiser FE Old-tatter takes 60-power 3-dr BC Two-piece wing OPSOn ler easy transport Two sheets $1275 immense surprise fortunate No 424 Good Tern PP Embryo Erinderance ruSher-power floatyfane has optional wheels strdr-attd-hssue delrgto $200 enough witness historic event No425 Skyrocket CL Pus-Scale sport tier tooks like Grummans on-none Navy twin moles hen 1P.M $325 wheels left ground After climbing 0 00 mmmmm mm mmmm m moothly away Bar-Jay flown U two complete circuits rcle numbers plans wish order brought gentle touchdown 193225239262282291299302 310It happened suddenly i31432332343348354358362365 368 some time enormity event 0I sink hardly believable Fortu 378379383386389392393394395Inately spectators armed video camera happenings 396398399401403404405406407408recorded posterityand team wE 10411412413414415416417418be able prove really did happen E 0 U Sunday March 20 1983 will remem 9 420421422423424425426427 428bered day model aero e includes first-class poStage Send ChBCk money order payable tonautical achievement attainedafter Model Aviation AMA 1810 Samuel MorSo Dr ReSton VA 22090I nearly 40 years quest Likely will se print carefullyEnclosed $ --_____ __I substantially change hobby few modelers may able use ajet turbine 4i NAME neif become available STREET_____- __ __-__commercidlly ___I significance achievement 5E CITY~ ____ ____ p modelers have NSTATE _____ ______________~ ZIP pioneering spirit accept challenge ______ ___________________ also determination carry through successful conclusion mmmmmmmmmmmmmmmmmmmmmmmmm 178 Model Aviation
Edition: Model Aviation - 1983/12
Page Numbers: 88, 89, 90, 174, 176, 177, 178
THE INFAMOUS Peace Ladies camped outsi4e Greenham Common Air Base England did seem too perturbed few score modelers cars lined-up enter main gate thing nearest re semblance Cruise missile motley assortment RC models packed rear some vehicles However cars model eyes least just revolutionary sophisti cated missile destined make historythough modeling history Sunday February 27 1983 day scheduled maiden flight RC model fitted genuine gas turbine jet engine true British tradition day cold wet windy following description efforts Gerry Jackman team produce practical model jet turbine engine gives some insight dedication small years mod elers have dreamed jet engine power true manner full-size airplanes wasnt until last March best knowledge someone actually flew RC model powered gas turbine en gine author pro vides first-hand account flight some background con cerning engines development U David Boddington 88 Model Aviation Top Designed Barry Beicher Bar-Jay successfully flown under power minia ture gas turbine let engine developed Gelry Jackmans team Flying weight around 16 lb Landing gear fixed prototype though future versions will include retracts Design includes twin booms high-mounted horizontal tail surfaces clear engines powerful jet blast Above victorious team Gerry Jackman center hard working assist ants L-R David Stitch Barry Baicher Jackman Chris White Ray Carter obscured group people prepared abandon project face setbacks frustrations disappointments Despite admonitions what attempting impossible realization various times throughout development period detractors might well right persisted plans stage dreams became reality past 35 years have arti cles written modeling magazines about model gas turbine enginessome purely theoretical others purporting based practical experiences few contributors have honest enough admit efforts crowned suc cess producing engine useful output experiments exciting Less forthright contributors tended give impression gas turbine engines built successfully run fitted flown models individual gall otfer plans instructions working jet turbine engineno working examples have seen date No photographic corroborative evidence presented prove RC model aircraft flown under power genuine gas turbine engine first pure jet aircraft flew 1939 Heinkel 178 Frank Whittle already carrying out test runs jet engine two years 1930 Whittle first took out patent form propulsion Perhaps surprising nearly 50 years after original design full-size gas turbine aircraft engine just reaching stage developing equivalent model size look few considerations involved pro ducing such engine will soon give insight goal has eluded engineers modelers long form jet engine has found favor modelers has pulsejet have us since 1950s Pulse-jets have big advantage have minimum working partsjust reed flap valves front combustion chamber Air introduced through valves mixed fuel mixture ignited spark plug After corn bustion completed gasses have expelled high velocity via tail pipe partial vacaum created com bustion chamber cycle repeated frequency pulses governed design shape combustion area tail pipe simple pulse-jet unfortunately ideal answer Scale modelers prayer jet engine Starting requires high-pressure blast air intake throttling qualities virtually zero noise levels sufficient put selfMounting brackets made aluminum alloy designed permit rapid removal engine inspection testing top engine fuel line returning preheating area carburetor Rear pipe temperature checked before putting cowl flight December 1983 89 engine revealed see course critical parts inside air inlet moulding fiberglass/epoxy engine cowling Bar-Jay fuselage Test sockets provided engine ground-monitoring compressor speeds tail pipe tempera ture Liquid propane fuel preheated beforeentering engine via twin fuel lines Cylindrical oil supply reservoir lubricate bearings situated just behind RC gear rear oil reservoir just visible airborne propane fuel tank holds enough about six minutes fliqht time ohotos author respecting heavy rock band shame Worse still sound doesnt resemble full-size jetexcept dreaded V-I flying bomb essential difference between ram jet pulse-jets ajet turbine engine latter uses compressor multi-stage axial compressors draw air com bustion chamber compress rotate compressor unit turbine wheel fitted common shaft gasses com bustion chamber pass through turbine blades turn complete compressor turbine assembly Part energy ab sorbed turbine remainder pro vides propulsive thrust jet engines based fundamental law physics states action equal reaction Combustion gasses expelled much higher velocity result compression heating combustion intake air velocity producing thrust big problems producing miniature jet turbine engine operating temperatures will region 6000C Another shaft speed compressor/turbine assembly may ap proaching 100000 rpm obtain workable thrust levels degree technological expertise required fields metal lurgy thermodynamics engineering considerable expanding team Gerry Jackman originator project decided build ajet turbine engine given little encouragement colleagues con sidered him loser Only determination obvious will succeed encouraged fel low modelers offer assistance Grad ually over past eight years strength team has increased inclusion specialist knowledge various facets technical design engi neering First offer services Barry Belcher aerodynamicist has responsible design Bar-Jay model used testbed latest en gine Barry also responsible major breakthrough designed revised turbine blade section improving static Continued page 174 90 Model Aviation Left The compressor blades can seen top right Underneath wing fillet tuel till overflow vents forward gear fitted abrasion brake acting tire Right View partial rear shows good fits expects well thought out design reservoir oil lubricate front rear shaft bearings engine can seen clearly picture well throttle servo Has four-channel Futaba controls trs . Ray Carter about connect propane fuel hose models fitting front model high-speed starter 24V motor geared turn up about 30000 rpm THIS FUEL FEATURES ORUST PREVENTION AGENTS ODETERGENTS OLUBRICAllON WITH HIGH FLASH POINTS sWElliNG AGENTS FOR MORE EFFICIENT AND DEPENDABLE RJEL FLOW OANTI-FOAMING AGENTS TO PREVENT LEAN RUNS KEEPS YOUR ENGINE RUNNING COOL sAN ODORLESS HIGHLY REFINED FUEL CHILDPROOF LIDS Available FAI 5 10 15 25 & AO% NiITo-Methane Contents Formulated synthetic lubriconts Also available castor DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT This competition fuel tast becoming THE CHOICE top profesionols first cash product Contact us price structures ordering information Manufacturers Major Brand Distributors Model Engines Kits Radios Accessories SUPER K Fuels brand KiNGS RADIO CONTROL HOBBIES INTERNATIONAL 3960 West 46 Ave Hialeah Florida 33042 305 557-2024 cross-grain tips rudders etc harder wood better grain should laid out run same direc tion span wing Make own plans Keep sketching top view until suitable draw side view along front tail views same scale Trace final top view onto selected board carbon paper below plan Redraw board ball-point pen dark pencil permanent imprint wood has inter esting grains along board might want select spot fall midfuselage location grain patterns finished wing will same both sides lucky can find boards swirls fall identically both wing halves Cut outline top view first want square sides top bottom board Once rough cut complete cut outside line allow errors sawcut bungles Dremel trim sand lines Next draw side views -in edge sim ply start carving until have removed excess wood down will file grind away remainder finished surfaces use No 50 production paper sand first smooth outline after filing done go No 120 followed final sanding No 220 wet-or-dry A-weight paper Dont strive too much detail unless expert finish can either natural wood makes fine model enjoy can make glossy spraying three coats Krylon Clear sanding No 220 wet-or-dry between coats have add rigging youll probably drilling holes Use nylon thread Mark location hole sharp pin wobble pin make starting place drill Drill handturning chuck power-drill could slip destroy few hours work almost impossible remove damaged areas sanding because wings already very thin case Whitehead 1901 No 21 carving Whitehead 1905 hang gliders nine-rib five-rib types rigging piece thread continuous pattern struts landing gear frame work pilot hang find popsicle sticks wooden forks French fries quite useful having strong grains structural needs Years age perhaps centuries Euro peans could afford fancy blown-glass ornaments Christmas trees make made orna ments curly shavings off car penters planewith much artistic imagination some glue SAFE FLYING IS NO ACCIDENT ornaments often accompanied other clevet attractive pieces such crib made nut shells infant figure bedded scraps cloth colors Animals skiing Santas host other wonderful wooden ornaments grew popularity exported over world Most made Germany Alps Copies now guessed made Hong Kong Airplane ornaments some thing can make enjoy Turbine/Boddington Continued oaae 90 thrust engine 20% Following turbine failure earlier enginesa traumatic cata strophic event served emphasize compiexitles dangers project Ray Carter brought work stress calculations engineering design Since time have no similar failures Ray has able advise special welding techniques pressed steel work prepare technical drawings recurring problem early engines failure rate shaft bearings speeds temperatures involved bearings would survive matter minutes full operating power Failures due partly high temperatures speeds serious contributing factor shafts whirlthe whipping oscil lation over unsupported length about 6 David Sitch bearings con sultant able advise cor rect selection bearings obtain combat shaft whirl correlation compressor design combustion chamber heat output nozzle ring turbine blade angle settings paramount importance efficient output small gas turbine engine points critical model-sized engines commercial-sized units efficiencies will result power outputs too low practical purposes Thermodynamic design considerations became responsibility Chris White has constantly striving refine design engine improve thermal efficiency produce useful thrust current development work aimed producing superior tail pipe design Whereas model aircraft can usually designed built will fly straight off building board no easy straightforward solutions constructing miniature gas turbine engine Gerry Jackman has phlegmatic tenacious personality freely admits eight years development have number occasions prospect eventual success appeared very remote Without support strong backup team proj ect may have faltered crisis suc ceeded another seemingly impassable complication have triumphed others have failed because have refused beaten have collective faith see job through end 174 Model Aviation specially formulated chemically balanced fuel top performance minimum engine wear weather condition PRODUCTS FOA~ Complete Line Exhaust Systems * Tuned Pipes led Tuned Pines * Headers * Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpassed WokmanshiD & Performance mtcfled Performance ystem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMERK&B SUPER POSY PAINT K&B MIXING CLIPS opinion no reason com mercial firm could have produced prac tical working jet turbine engine modelersprovided prepared invest thousands dollars de velopment experimental work Theirs has solo effort have received no assistance advice manufacturers designers full-size turbojet engines has amateurism highest pro fessional standards Design construction data view proprietary nature miniature gas turbine engine would unfair give detailed information design con struction unit After thousands hours research development work team naturally hopes recoup some re ward its efforts following brief comments will provide idea meth ods employed considerable technical barriers overcome Nimonic alloys stainless steel principal metals used construction engine Correct selection metals allow complimentary rates expansion closely-mating components vitally impor tant Equally important metals capable withstanding high stresses cer tain components tip speed com pressor 1100 ft per second high temperatures compressor ma chined high-quality duralumin dropforged material would have preferable couldnt easily obtained small quantity needed development prototypes Early attempts producing turbine wheel totally successful previ ously explained eventually nec essary construct special spark-eroding machine manufacture item tur bine takes 130 hours machining erod ing fumes dielectric fluid dur ing eroding process pretty obnoxious despite being perfumed Balancing compressor/turbine rotor has ultra pre cise rebalancing has carried out time bearing replaced Close-tolerance machining obviously needed project sophisticated gas MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler holiday season Standing 51/2 inches tall large 10 oz capacity its real attention getter definite colector piece years come ORDER NOW FOR THE HOLIDAYS ONLY $695 ER PLUS $200 POSTAGE & HANDLING PER ORDER RJL INDUSTRIES OX 5654 DENA CA 91107 795-9821 TAN COLORED OVEN GLAZED LIMITED PRODUCTION turbine engine work carried out Myford Super 7 lathe mod est commercial standards small mill ing machine typical power hand tools would expect find modelers well-stocked workshop present engine has tested over past 12 months concentrating initially obtaining reliable running im proving thrust levels Propane gas used bench running proved very suitable fuel engine fit ted model change made liquid propane storage vessel propane gas form too large bonus injecting liquid propane combustion chamber increased thermal efficiency engine disadvantage became difficult accurately meter fuel supply Rear bearings now survive accept able period proving team has able select correct bearings obtain reasonable operating temperatures rear end rotor shaft Temperature readings various points engine have monitored throughout test period Indeed total development has logical planned throughout eight years experimentation Temptations bolt unit temporary airframejust see whether would flyhave re sisted whole project has pro fessionally handled Good throttling respone feature engine although aircraft response power changes slow compared propeller-driven aircraft Shaft speeds 80-85000 rpm maximum result static thrusts 7 8 lb jet pipe tem peratures region 600-6500C comparison average internal combustion engine seems pretty pedestrian Greenbam Common debut Waiting rain cease least gave oppor tunity chatting Gerry Jackman before maiden flight attempted seemed remarkably relaxed com posed view circumstances wish get engine started aim model down runway watch make sky assured would make previous struggles 176 Model Aviation b p ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX A&A Industries AMA Membership Ace RC Inc Aero Tech RC . Air Tech Airtronics Phase Art ec Products Inc Americas Hobby Center b&r Hobbies Balsa USA Bavarian Precision Products Dave Brown Products Buckeye Balsa Buzzard Aircraft Byron Originals California Model Imports lina-Taffinder1 11 Johnnie Casburn Mfg27 Chevron153 Circus Hobbies86-87 Cleveland Model & Supply Co166 Condor Hobbies47 Consumers Guide RC Aircraft Prod. Consumers Hobby Corp150-151 Coverite 92 DA Enterprises26 D&D Engineering157 DG Products156 DGA Designs129136 DGM Industries177 Davey Systems Corp156 Larry Dodge Aero Inc140 Dougs Hobby Shop138-139 Du-Bro Products46 Dynathrust Props18 E&L Manufacturing84 Eastern Soaring Supply177 Addis Elmore159 Enys Model Engines nside Back Cover FAI Model Supply FHS Supply Inc Fab-Tek Inc Fabtronics Fiberglass Master Flite Line Products Flyline Models Fourmost Products Fox Mfg Co Full Command Systems14 Futaba Corp America93 163 98 53 154 132 140 82 91 4 92 140 141 152 Gator RC Products Giezendanner USA Carl Goldberg Models Gorham Model Products Great Lakes Model & Mold Great Planes Model Mfg Co Grish Brothers Art Gross Enterprises 14 9165 15 129 18 162 156 Hardware Systems William Hawke Heritage Models Inc Historic Aviation Hobby Barn Hobby Capitol Distributors Hobby Hideaway Hobby Horn 25 Hobby Lobby International Hobby Radio Shop Hobby Swap News 10 159 180 11 130-131 171 161 172 81 158 173 172 146-147 133 Ikon NWest Indy RC Sales International Modeler Show J-5 Enterprises Hi Johnson Model Products Jomar Products K&B Manufacturing Co K&S Engineering Kalee Inc Kin Craft Kings RC Hobbies Intl. K raft Systems Kustom Kraftsmanship Leisure Electronics n J Lind Co LoneStar Models 176 154 161 136 167174 49 171 164 Nor-Cal Aviaonics28 Ohio Superstar144 P&G Metal Products Pacer Technology & Resources Pacific Air Peck-Polymers Pica Products Polks Hobby Proctor Enterprises 157 179 173 161 136 155 4 RF Enterprises168 R LF Products177 RJL Industries176 Radio Equipment Exchange141 Radio South141 Redwood Hobby Imports172 Repla-Tech International141 Richardson Precision Machining172 Robbe Modellsport ide Front Cover 1 Roush Mfg Co 145 SR Batteries S&W Hobby Supply Saf-Flite Models 159Satellite City 160Scratch-A-Plane 157Seaglen Model Co Semco Sheldons Hobby Shop Sig Manufacturing Co St Croix Park Falls Ltd Sterling Models Swanson Associates T&D Fiberglass 173 Tatone Products 171 Taylor-Craft Ltd 137 Tide Distributors Inc Top Flite Models r Hobbies Twinn-K Inc.MACS Products MGA Enterprises Magus Model Aircraft 160 Majestic Models 170 Marks Models 148 George Marsden 158 Master Kit 176 McDaniel RCService 8 Jim Messers Quality Model Products 144 Midwest Model Supply Co 161 Midwest Products Co 169 Mills Airplane Models Model Rectifier Corp 176 145 148 173 51 26 137 160 171 41 23 132 29 134-135 Mutchlers Hobbies 92 82 177 160 24 167 170 83 142-143 13 158 28 157 144 83 156 19 149 175 82 VK Model Aircraft Bob Violett Models Vogel Aviation WE Technical Services iams Brothers Windsor Propeller Co World Engines 145 168 137 166 10 10 Back Cover Zenith Aviation Books5 Nick Ziroli Models132 153 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX worthwhile whole team would probably dissolve floods tears rain eventually ceased late afternoon Bar-Jay model quickly assembled numerous spectators moved safe position models fuel tank filled Looking down line critical spectatorsincluding some cynical prophets doomit impos sible admire courage Gerry inviting such gathering proposed maiden flight Anxious faces watched ignition plug energized starter applied nose cone Would fire life Starter speeds 25000 rpm required over come turbine losses speed reached could heard un mistakable jet turbine whine ignition took place Gradually pitch whine creased sound ex-jet-pilot pure music Surprisingly overall noise levels no means objectionable As engine built up full operating speed signs rough running almost though afterburner operating intermittently Just hatch about attached engine began die Further attempts starting engine resulted same erratic running Eventu ally efforts abandoned because GET ORGANIZED s set 4 sturdy tries thai holds over 4 yeas taoote 8 11 magazines 4 MAG FILES $495 Send 5495 p1058100 postage handling 0GM INDUOTNIES PO SOX 388-K DOVER NH 03880 December 1983 177 CUSTOM FOAM WINGS d IAIL CUS TOM SAILPLANE WINGSd TAILS SPRAY ADHESIVES FIBERGLASS FUSELAGES HI STARTS BALSA d PLYWOOD SEND 50 d 10 SASE FOR INFO ESS BOX 437 LEMONT PA /685/ P40 GAIl KIT FW.L COLOR EXACT REPRODUCTION heR pdea Sand Ta NOW00 REMEMBER HOW WELL THEY FLEW Spaniel nfl hatsda eases tar raeatakg sat StFm Madatap am Mmd Reansfi. Mt * *SAILPLANE* * launching equipment hi-starts/winches/accessories complete line/best pricesltop quality send self-addressed stamped envelope catalog/information RLF PRODUCTS R3 Box 178-Y PaoIi IN 47454812123-4310 impending darkness ____________________________________________________________[v32][b1588152171700]] say failure get model airborne disappointment spec tators stating obvious team __________________________________________________________must have devastating confidence venture would suc cess thwarted last No 426 China Clipper$2000minute RC Fantastic Sport Scale flying boat four 10-size engines 4-channel RO Three sheets no documentation Spans 74 in The sweet smell success tt did take No 427 Profiles$200long Gerry crew overcome FF Travelair Mystery Ship Miss Los Angeles profile all-balsa rubber mod- temporary setback soon els sport flying Wingspans 17 investigating reasons erratic runNo 428 Bearcat$525ning engine worked perfectly CL Big competition-caliber profile Precision Aerobatics plane 60 power on bench conclusion came No 131Gee Bee Modei Y 40-powered BC stand-off scale Ifre great old-tone racers$500 No 193Slillelto CL Stunt model McDonald winner 19761980 1982 FAI World champs$375was liquid propane fully No 225Ole Reliable BC 70 version 3ff old-toner REM controls 19-25$425 No 239Blue Beds RC Ken Willares formation plane 4-rh 10 vaporizing combustion chamber No 262Crasimusslee CL Crash-proof trainer 2 srzes 15-30 36-40$125secondary combustion taking place No262Gee Bee RC Granger Withams magnifrcent Model Z 40 engine$750 No291Csp2O dOpowered scale BC French aerohaff C plane Low wing tail-dragger2 sheetssothe jet pipe cure fuel feed line No269Gee Bee Sr Spoelsten RC t/4-scale Hafffte 91 finwer Prototype 5P 1175was taken around tail pipe preheat No 302Mini P18 FE Sarpolus 049 ducted fan sport f 2-rh Balsa wings tad tone strudore$275 No 3101930 Fleet Biplane RC Sport Orate icr 35-40 4-rh Wingspan 56 1/6 scale Two sheets$625fuel before injected com $375 No 314*e B BC Ken Wrflards flying boat 3-rh. 15-Power Ft7 wtttl rrtttoraltle ~bustion chambers Excessive pressure No326Tayice Cult PC Don Stolts schordyard-Scale 049s 2-2 CS Spans 50 te No 332Zepmye BC Soraif 2-rh glider br hand-launch tow thennid stope soadng$200 No 343Wasp Vi FF Mike Stoys Hats-winning Orddonr HEG$100built up fuel line first experi No348one RcTramerhasoeryforgfongffytnggsidtses3-dr 10-25power-$425ments further modifications showed No 354Menbyn FE Giant 155-in span Sadfdane uses 3 RC channels$750 No 358 Pieces FF Indoor Easy B RaSher-power contest-winner W Van Gorder$100greater promise No 362Supeecat BC Haff-APyfon Racer/sport ffmr aileron idevator control Foam sing -$200 meantime decided next sNo 365Seemastee BC Wtllards 40-size ttying boat 4-rh Strap-on gear fandplanet 2 shts-$1100 No 368space Shuttle B FE targer improved version Boo glider 3-rh$550outing would carry out extended No 370CAP21 BC GiantSrale French aerohatic craft spans 71/4 9 Quadra power 2 sheets dec$1400 278Me Spout U FE Fly Sport Pyfon NoviSportsman Paoern sheet sport Uses 4-dr 25-40 pwr$500taxi trials before attempting fly model oNo 379 m Spg Cf t Coorhat stdp large Ight super pertoniter-The throttle opening fixed give CJNo 383CaUsto 93 FE Fly sleek Nato mowing Salt plane AMA Mod tad thrfemfed classes-$750 o No366Laser 260 FE Sport Scale rephca 01 rhantyfooship Aerohafic flier uses 40 power 4-5dr 2sf9s$1075upper operating limit 60000 rpmwell No366US Mate BC I-loge gentle-lIving Styfane trainer sport Spans BOrn 00 errgsre 3-rh Tee shts-$1400 No 382Ciwisfiaphen FE Sport Scale porarhotist Two-dr set tories torso moves anon 425below maximum speed avail-No 383A Kioud King BC Reduced modernized verston 193ff design t2A Old-tatter 2cr 3dr-able No 294Ron Crow FF High-performance Quidoor Hand Launched Glider -$175 orNo386 yB CL t2A Racer lot MooseorScale Plans shewCoBtack Widow Spans 182/4 mV-tad$175 further trip Greenham Common Air aNo 396Lee-Rictueds FF Eledno-powered 020 Scale ring-sing oldie .$350 No398 flflcriarger Fouruhfa dnc$2225Base kind permission CO No396Zephyr 1100 FE AMA Ctoss B Sadplane 3-channel BC gear.made Again weather poor o No 401Royal Lancer FF Basic competitron wodid icr AMA Ctass uses stasdard-pertcrrttanre 15 engines $550 Z 0No 403Cub Ficalpiane BC Sport Scale tar OAg-tO-stce engines 4-dr BC J3 ffoats sa clanror$600time less critical - No 404Focke-Wuff 100 CL Proffie Scale tp.A power ieatarea anique engine mount icr erote reaienn$300 No405RegenflOnotOueSklesFEFuntopobiptarefor4060Power4-~f2ch -$1350only taxiing Gerry quite happy No 406Piper Coerancle CL Sport Scale uses 2Ss firroftle control 2 sheets$625 No407BoelngXFS8-l RCSpooScaiefori2Apower2-3drannelsgeneral ground handling qualities $600model decided give faster run a- taNo 406 ReVoff-Er BC elertuc power sport filer 2-chaneef 05 motor .. No409 Folikee Spin 16 PP Scale ot early monoplane trainer 049 power Three sheets plus dertallentatiotl- $825 410 pobee Plate BC Scale famous EAA plane 40-power 4-dr Bainid sport t$1200Acceleration considerably rapid $825 ~ Stunterbalndoor ~uh0rt lines $175than anyone predicted found No413 BonanasCLPtOStetonscaleStunterforlSto 25 engines PC scated-ap 1939 totter power tavonte $325 himself position having make No 414 Etecttic Sperimy BC ideduc powered ton tlmr 05 motor0000 reNo415 NawimerlkarrlceneNkl FEElectncpowerSportSraietort5mofcr3-4cham$1175instant decision Flying speed being 6 Stuntfire 60 CL Big 62-in-span Stonter 80-power - reached either engine shut 17 Spoetwagon JR BC Pulse-rudder uportsfer 02-power $300 No 418 Luton Minor BC Sport Scale model t930s Bn5sh Sgfintptane Icr 19-power 4-draminof PC $725 down flight made No 419 Dove 650 CL Coropetitien Stonter ior 40-46 power has foam wing slab $700 No426 Buck600FFCotllpe6tleOCtas5AorBfcrto-2t powerHassatialtle-arrtdettcetadVtT $600 Being man conviction faith No 421 Annes Plane CL WA traeter/sporfsfer rugged balsa faul-Suinlang Gerry e 9No422 Scooter tiC Two-Meter Saddarte has won Hats eveot 1992 t9fl3 plan Other contests$550ased back elevator stick No422 Cloud Cruiser FE Old-tatter takes 60-power 3-dr BC Two-piece wing OPSOn ler easy transport Two sheets $1275 immense surprise fortunate No 424 Good Tern PP Embryo Erinderance ruSher-power floatyfane has optional wheels strdr-attd-hssue delrgto $200 enough witness historic event No425 Skyrocket CL Pus-Scale sport tier tooks like Grummans on-none Navy twin moles hen 1P.M $325 wheels left ground After climbing 0 00 mmmmm mm mmmm m moothly away Bar-Jay flown U two complete circuits rcle numbers plans wish order brought gentle touchdown 193225239262282291299302 310It happened suddenly i31432332343348354358362365 368 some time enormity event 0I sink hardly believable Fortu 378379383386389392393394395Inately spectators armed video camera happenings 396398399401403404405406407408recorded posterityand team wE 10411412413414415416417418be able prove really did happen E 0 U Sunday March 20 1983 will remem 9 420421422423424425426427 428bered day model aero e includes first-class poStage Send ChBCk money order payable tonautical achievement attainedafter Model Aviation AMA 1810 Samuel MorSo Dr ReSton VA 22090I nearly 40 years quest Likely will se print carefullyEnclosed $ --_____ __I substantially change hobby few modelers may able use ajet turbine 4i NAME neif become available STREET_____- __ __-__commercidlly ___I significance achievement 5E CITY~ ____ ____ p modelers have NSTATE _____ ______________~ ZIP pioneering spirit accept challenge ______ ___________________ also determination carry through successful conclusion mmmmmmmmmmmmmmmmmmmmmmmmm 178 Model Aviation
Edition: Model Aviation - 1983/12
Page Numbers: 88, 89, 90, 174, 176, 177, 178
THE INFAMOUS Peace Ladies camped outsi4e Greenham Common Air Base England did seem too perturbed few score modelers cars lined-up enter main gate thing nearest re semblance Cruise missile motley assortment RC models packed rear some vehicles However cars model eyes least just revolutionary sophisti cated missile destined make historythough modeling history Sunday February 27 1983 day scheduled maiden flight RC model fitted genuine gas turbine jet engine true British tradition day cold wet windy following description efforts Gerry Jackman team produce practical model jet turbine engine gives some insight dedication small years mod elers have dreamed jet engine power true manner full-size airplanes wasnt until last March best knowledge someone actually flew RC model powered gas turbine en gine author pro vides first-hand account flight some background con cerning engines development U David Boddington 88 Model Aviation Top Designed Barry Beicher Bar-Jay successfully flown under power minia ture gas turbine let engine developed Gelry Jackmans team Flying weight around 16 lb Landing gear fixed prototype though future versions will include retracts Design includes twin booms high-mounted horizontal tail surfaces clear engines powerful jet blast Above victorious team Gerry Jackman center hard working assist ants L-R David Stitch Barry Baicher Jackman Chris White Ray Carter obscured group people prepared abandon project face setbacks frustrations disappointments Despite admonitions what attempting impossible realization various times throughout development period detractors might well right persisted plans stage dreams became reality past 35 years have arti cles written modeling magazines about model gas turbine enginessome purely theoretical others purporting based practical experiences few contributors have honest enough admit efforts crowned suc cess producing engine useful output experiments exciting Less forthright contributors tended give impression gas turbine engines built successfully run fitted flown models individual gall otfer plans instructions working jet turbine engineno working examples have seen date No photographic corroborative evidence presented prove RC model aircraft flown under power genuine gas turbine engine first pure jet aircraft flew 1939 Heinkel 178 Frank Whittle already carrying out test runs jet engine two years 1930 Whittle first took out patent form propulsion Perhaps surprising nearly 50 years after original design full-size gas turbine aircraft engine just reaching stage developing equivalent model size look few considerations involved pro ducing such engine will soon give insight goal has eluded engineers modelers long form jet engine has found favor modelers has pulsejet have us since 1950s Pulse-jets have big advantage have minimum working partsjust reed flap valves front combustion chamber Air introduced through valves mixed fuel mixture ignited spark plug After corn bustion completed gasses have expelled high velocity via tail pipe partial vacaum created com bustion chamber cycle repeated frequency pulses governed design shape combustion area tail pipe simple pulse-jet unfortunately ideal answer Scale modelers prayer jet engine Starting requires high-pressure blast air intake throttling qualities virtually zero noise levels sufficient put selfMounting brackets made aluminum alloy designed permit rapid removal engine inspection testing top engine fuel line returning preheating area carburetor Rear pipe temperature checked before putting cowl flight December 1983 89 engine revealed see course critical parts inside air inlet moulding fiberglass/epoxy engine cowling Bar-Jay fuselage Test sockets provided engine ground-monitoring compressor speeds tail pipe tempera ture Liquid propane fuel preheated beforeentering engine via twin fuel lines Cylindrical oil supply reservoir lubricate bearings situated just behind RC gear rear oil reservoir just visible airborne propane fuel tank holds enough about six minutes fliqht time ohotos author respecting heavy rock band shame Worse still sound doesnt resemble full-size jetexcept dreaded V-I flying bomb essential difference between ram jet pulse-jets ajet turbine engine latter uses compressor multi-stage axial compressors draw air com bustion chamber compress rotate compressor unit turbine wheel fitted common shaft gasses com bustion chamber pass through turbine blades turn complete compressor turbine assembly Part energy ab sorbed turbine remainder pro vides propulsive thrust jet engines based fundamental law physics states action equal reaction Combustion gasses expelled much higher velocity result compression heating combustion intake air velocity producing thrust big problems producing miniature jet turbine engine operating temperatures will region 6000C Another shaft speed compressor/turbine assembly may ap proaching 100000 rpm obtain workable thrust levels degree technological expertise required fields metal lurgy thermodynamics engineering considerable expanding team Gerry Jackman originator project decided build ajet turbine engine given little encouragement colleagues con sidered him loser Only determination obvious will succeed encouraged fel low modelers offer assistance Grad ually over past eight years strength team has increased inclusion specialist knowledge various facets technical design engi neering First offer services Barry Belcher aerodynamicist has responsible design Bar-Jay model used testbed latest en gine Barry also responsible major breakthrough designed revised turbine blade section improving static Continued page 174 90 Model Aviation Left The compressor blades can seen top right Underneath wing fillet tuel till overflow vents forward gear fitted abrasion brake acting tire Right View partial rear shows good fits expects well thought out design reservoir oil lubricate front rear shaft bearings engine can seen clearly picture well throttle servo Has four-channel Futaba controls trs . Ray Carter about connect propane fuel hose models fitting front model high-speed starter 24V motor geared turn up about 30000 rpm THIS FUEL FEATURES ORUST PREVENTION AGENTS ODETERGENTS OLUBRICAllON WITH HIGH FLASH POINTS sWElliNG AGENTS FOR MORE EFFICIENT AND DEPENDABLE RJEL FLOW OANTI-FOAMING AGENTS TO PREVENT LEAN RUNS KEEPS YOUR ENGINE RUNNING COOL sAN ODORLESS HIGHLY REFINED FUEL CHILDPROOF LIDS Available FAI 5 10 15 25 & AO% NiITo-Methane Contents Formulated synthetic lubriconts Also available castor DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT This competition fuel tast becoming THE CHOICE top profesionols first cash product Contact us price structures ordering information Manufacturers Major Brand Distributors Model Engines Kits Radios Accessories SUPER K Fuels brand KiNGS RADIO CONTROL HOBBIES INTERNATIONAL 3960 West 46 Ave Hialeah Florida 33042 305 557-2024 cross-grain tips rudders etc harder wood better grain should laid out run same direc tion span wing Make own plans Keep sketching top view until suitable draw side view along front tail views same scale Trace final top view onto selected board carbon paper below plan Redraw board ball-point pen dark pencil permanent imprint wood has inter esting grains along board might want select spot fall midfuselage location grain patterns finished wing will same both sides lucky can find boards swirls fall identically both wing halves Cut outline top view first want square sides top bottom board Once rough cut complete cut outside line allow errors sawcut bungles Dremel trim sand lines Next draw side views -in edge sim ply start carving until have removed excess wood down will file grind away remainder finished surfaces use No 50 production paper sand first smooth outline after filing done go No 120 followed final sanding No 220 wet-or-dry A-weight paper Dont strive too much detail unless expert finish can either natural wood makes fine model enjoy can make glossy spraying three coats Krylon Clear sanding No 220 wet-or-dry between coats have add rigging youll probably drilling holes Use nylon thread Mark location hole sharp pin wobble pin make starting place drill Drill handturning chuck power-drill could slip destroy few hours work almost impossible remove damaged areas sanding because wings already very thin case Whitehead 1901 No 21 carving Whitehead 1905 hang gliders nine-rib five-rib types rigging piece thread continuous pattern struts landing gear frame work pilot hang find popsicle sticks wooden forks French fries quite useful having strong grains structural needs Years age perhaps centuries Euro peans could afford fancy blown-glass ornaments Christmas trees make made orna ments curly shavings off car penters planewith much artistic imagination some glue SAFE FLYING IS NO ACCIDENT ornaments often accompanied other clevet attractive pieces such crib made nut shells infant figure bedded scraps cloth colors Animals skiing Santas host other wonderful wooden ornaments grew popularity exported over world Most made Germany Alps Copies now guessed made Hong Kong Airplane ornaments some thing can make enjoy Turbine/Boddington Continued oaae 90 thrust engine 20% Following turbine failure earlier enginesa traumatic cata strophic event served emphasize compiexitles dangers project Ray Carter brought work stress calculations engineering design Since time have no similar failures Ray has able advise special welding techniques pressed steel work prepare technical drawings recurring problem early engines failure rate shaft bearings speeds temperatures involved bearings would survive matter minutes full operating power Failures due partly high temperatures speeds serious contributing factor shafts whirlthe whipping oscil lation over unsupported length about 6 David Sitch bearings con sultant able advise cor rect selection bearings obtain combat shaft whirl correlation compressor design combustion chamber heat output nozzle ring turbine blade angle settings paramount importance efficient output small gas turbine engine points critical model-sized engines commercial-sized units efficiencies will result power outputs too low practical purposes Thermodynamic design considerations became responsibility Chris White has constantly striving refine design engine improve thermal efficiency produce useful thrust current development work aimed producing superior tail pipe design Whereas model aircraft can usually designed built will fly straight off building board no easy straightforward solutions constructing miniature gas turbine engine Gerry Jackman has phlegmatic tenacious personality freely admits eight years development have number occasions prospect eventual success appeared very remote Without support strong backup team proj ect may have faltered crisis suc ceeded another seemingly impassable complication have triumphed others have failed because have refused beaten have collective faith see job through end 174 Model Aviation specially formulated chemically balanced fuel top performance minimum engine wear weather condition PRODUCTS FOA~ Complete Line Exhaust Systems * Tuned Pipes led Tuned Pines * Headers * Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpassed WokmanshiD & Performance mtcfled Performance ystem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMERK&B SUPER POSY PAINT K&B MIXING CLIPS opinion no reason com mercial firm could have produced prac tical working jet turbine engine modelersprovided prepared invest thousands dollars de velopment experimental work Theirs has solo effort have received no assistance advice manufacturers designers full-size turbojet engines has amateurism highest pro fessional standards Design construction data view proprietary nature miniature gas turbine engine would unfair give detailed information design con struction unit After thousands hours research development work team naturally hopes recoup some re ward its efforts following brief comments will provide idea meth ods employed considerable technical barriers overcome Nimonic alloys stainless steel principal metals used construction engine Correct selection metals allow complimentary rates expansion closely-mating components vitally impor tant Equally important metals capable withstanding high stresses cer tain components tip speed com pressor 1100 ft per second high temperatures compressor ma chined high-quality duralumin dropforged material would have preferable couldnt easily obtained small quantity needed development prototypes Early attempts producing turbine wheel totally successful previ ously explained eventually nec essary construct special spark-eroding machine manufacture item tur bine takes 130 hours machining erod ing fumes dielectric fluid dur ing eroding process pretty obnoxious despite being perfumed Balancing compressor/turbine rotor has ultra pre cise rebalancing has carried out time bearing replaced Close-tolerance machining obviously needed project sophisticated gas MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler holiday season Standing 51/2 inches tall large 10 oz capacity its real attention getter definite colector piece years come ORDER NOW FOR THE HOLIDAYS ONLY $695 ER PLUS $200 POSTAGE & HANDLING PER ORDER RJL INDUSTRIES OX 5654 DENA CA 91107 795-9821 TAN COLORED OVEN GLAZED LIMITED PRODUCTION turbine engine work carried out Myford Super 7 lathe mod est commercial standards small mill ing machine typical power hand tools would expect find modelers well-stocked workshop present engine has tested over past 12 months concentrating initially obtaining reliable running im proving thrust levels Propane gas used bench running proved very suitable fuel engine fit ted model change made liquid propane storage vessel propane gas form too large bonus injecting liquid propane combustion chamber increased thermal efficiency engine disadvantage became difficult accurately meter fuel supply Rear bearings now survive accept able period proving team has able select correct bearings obtain reasonable operating temperatures rear end rotor shaft Temperature readings various points engine have monitored throughout test period Indeed total development has logical planned throughout eight years experimentation Temptations bolt unit temporary airframejust see whether would flyhave re sisted whole project has pro fessionally handled Good throttling respone feature engine although aircraft response power changes slow compared propeller-driven aircraft Shaft speeds 80-85000 rpm maximum result static thrusts 7 8 lb jet pipe tem peratures region 600-6500C comparison average internal combustion engine seems pretty pedestrian Greenbam Common debut Waiting rain cease least gave oppor tunity chatting Gerry Jackman before maiden flight attempted seemed remarkably relaxed com posed view circumstances wish get engine started aim model down runway watch make sky assured would make previous struggles 176 Model Aviation b p ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX A&A Industries AMA Membership Ace RC Inc Aero Tech RC . Air Tech Airtronics Phase Art ec Products Inc Americas Hobby Center b&r Hobbies Balsa USA Bavarian Precision Products Dave Brown Products Buckeye Balsa Buzzard Aircraft Byron Originals California Model Imports lina-Taffinder1 11 Johnnie Casburn Mfg27 Chevron153 Circus Hobbies86-87 Cleveland Model & Supply Co166 Condor Hobbies47 Consumers Guide RC Aircraft Prod. Consumers Hobby Corp150-151 Coverite 92 DA Enterprises26 D&D Engineering157 DG Products156 DGA Designs129136 DGM Industries177 Davey Systems Corp156 Larry Dodge Aero Inc140 Dougs Hobby Shop138-139 Du-Bro Products46 Dynathrust Props18 E&L Manufacturing84 Eastern Soaring Supply177 Addis Elmore159 Enys Model Engines nside Back Cover FAI Model Supply FHS Supply Inc Fab-Tek Inc Fabtronics Fiberglass Master Flite Line Products Flyline Models Fourmost Products Fox Mfg Co Full Command Systems14 Futaba Corp America93 163 98 53 154 132 140 82 91 4 92 140 141 152 Gator RC Products Giezendanner USA Carl Goldberg Models Gorham Model Products Great Lakes Model & Mold Great Planes Model Mfg Co Grish Brothers Art Gross Enterprises 14 9165 15 129 18 162 156 Hardware Systems William Hawke Heritage Models Inc Historic Aviation Hobby Barn Hobby Capitol Distributors Hobby Hideaway Hobby Horn 25 Hobby Lobby International Hobby Radio Shop Hobby Swap News 10 159 180 11 130-131 171 161 172 81 158 173 172 146-147 133 Ikon NWest Indy RC Sales International Modeler Show J-5 Enterprises Hi Johnson Model Products Jomar Products K&B Manufacturing Co K&S Engineering Kalee Inc Kin Craft Kings RC Hobbies Intl. K raft Systems Kustom Kraftsmanship Leisure Electronics n J Lind Co LoneStar Models 176 154 161 136 167174 49 171 164 Nor-Cal Aviaonics28 Ohio Superstar144 P&G Metal Products Pacer Technology & Resources Pacific Air Peck-Polymers Pica Products Polks Hobby Proctor Enterprises 157 179 173 161 136 155 4 RF Enterprises168 R LF Products177 RJL Industries176 Radio Equipment Exchange141 Radio South141 Redwood Hobby Imports172 Repla-Tech International141 Richardson Precision Machining172 Robbe Modellsport ide Front Cover 1 Roush Mfg Co 145 SR Batteries S&W Hobby Supply Saf-Flite Models 159Satellite City 160Scratch-A-Plane 157Seaglen Model Co Semco Sheldons Hobby Shop Sig Manufacturing Co St Croix Park Falls Ltd Sterling Models Swanson Associates T&D Fiberglass 173 Tatone Products 171 Taylor-Craft Ltd 137 Tide Distributors Inc Top Flite Models r Hobbies Twinn-K Inc.MACS Products MGA Enterprises Magus Model Aircraft 160 Majestic Models 170 Marks Models 148 George Marsden 158 Master Kit 176 McDaniel RCService 8 Jim Messers Quality Model Products 144 Midwest Model Supply Co 161 Midwest Products Co 169 Mills Airplane Models Model Rectifier Corp 176 145 148 173 51 26 137 160 171 41 23 132 29 134-135 Mutchlers Hobbies 92 82 177 160 24 167 170 83 142-143 13 158 28 157 144 83 156 19 149 175 82 VK Model Aircraft Bob Violett Models Vogel Aviation WE Technical Services iams Brothers Windsor Propeller Co World Engines 145 168 137 166 10 10 Back Cover Zenith Aviation Books5 Nick Ziroli Models132 153 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX worthwhile whole team would probably dissolve floods tears rain eventually ceased late afternoon Bar-Jay model quickly assembled numerous spectators moved safe position models fuel tank filled Looking down line critical spectatorsincluding some cynical prophets doomit impos sible admire courage Gerry inviting such gathering proposed maiden flight Anxious faces watched ignition plug energized starter applied nose cone Would fire life Starter speeds 25000 rpm required over come turbine losses speed reached could heard un mistakable jet turbine whine ignition took place Gradually pitch whine creased sound ex-jet-pilot pure music Surprisingly overall noise levels no means objectionable As engine built up full operating speed signs rough running almost though afterburner operating intermittently Just hatch about attached engine began die Further attempts starting engine resulted same erratic running Eventu ally efforts abandoned because GET ORGANIZED s set 4 sturdy tries thai holds over 4 yeas taoote 8 11 magazines 4 MAG FILES $495 Send 5495 p1058100 postage handling 0GM INDUOTNIES PO SOX 388-K DOVER NH 03880 December 1983 177 CUSTOM FOAM WINGS d IAIL CUS TOM SAILPLANE WINGSd TAILS SPRAY ADHESIVES FIBERGLASS FUSELAGES HI STARTS BALSA d PLYWOOD SEND 50 d 10 SASE FOR INFO ESS BOX 437 LEMONT PA /685/ P40 GAIl KIT FW.L COLOR EXACT REPRODUCTION heR pdea Sand Ta NOW00 REMEMBER HOW WELL THEY FLEW Spaniel nfl hatsda eases tar raeatakg sat StFm Madatap am Mmd Reansfi. Mt * *SAILPLANE* * launching equipment hi-starts/winches/accessories complete line/best pricesltop quality send self-addressed stamped envelope catalog/information RLF PRODUCTS R3 Box 178-Y PaoIi IN 47454812123-4310 impending darkness ____________________________________________________________[v32][b1588152171700]] say failure get model airborne disappointment spec tators stating obvious team __________________________________________________________must have devastating confidence venture would suc cess thwarted last No 426 China Clipper$2000minute RC Fantastic Sport Scale flying boat four 10-size engines 4-channel RO Three sheets no documentation Spans 74 in The sweet smell success tt did take No 427 Profiles$200long Gerry crew overcome FF Travelair Mystery Ship Miss Los Angeles profile all-balsa rubber mod- temporary setback soon els sport flying Wingspans 17 investigating reasons erratic runNo 428 Bearcat$525ning engine worked perfectly CL Big competition-caliber profile Precision Aerobatics plane 60 power on bench conclusion came No 131Gee Bee Modei Y 40-powered BC stand-off scale Ifre great old-tone racers$500 No 193Slillelto CL Stunt model McDonald winner 19761980 1982 FAI World champs$375was liquid propane fully No 225Ole Reliable BC 70 version 3ff old-toner REM controls 19-25$425 No 239Blue Beds RC Ken Willares formation plane 4-rh 10 vaporizing combustion chamber No 262Crasimusslee CL Crash-proof trainer 2 srzes 15-30 36-40$125secondary combustion taking place No262Gee Bee RC Granger Withams magnifrcent Model Z 40 engine$750 No291Csp2O dOpowered scale BC French aerohaff C plane Low wing tail-dragger2 sheetssothe jet pipe cure fuel feed line No269Gee Bee Sr Spoelsten RC t/4-scale Hafffte 91 finwer Prototype 5P 1175was taken around tail pipe preheat No 302Mini P18 FE Sarpolus 049 ducted fan sport f 2-rh Balsa wings tad tone strudore$275 No 3101930 Fleet Biplane RC Sport Orate icr 35-40 4-rh Wingspan 56 1/6 scale Two sheets$625fuel before injected com $375 No 314*e B BC Ken Wrflards flying boat 3-rh. 15-Power Ft7 wtttl rrtttoraltle ~bustion chambers Excessive pressure No326Tayice Cult PC Don Stolts schordyard-Scale 049s 2-2 CS Spans 50 te No 332Zepmye BC Soraif 2-rh glider br hand-launch tow thennid stope soadng$200 No 343Wasp Vi FF Mike Stoys Hats-winning Orddonr HEG$100built up fuel line first experi No348one RcTramerhasoeryforgfongffytnggsidtses3-dr 10-25power-$425ments further modifications showed No 354Menbyn FE Giant 155-in span Sadfdane uses 3 RC channels$750 No 358 Pieces FF Indoor Easy B RaSher-power contest-winner W Van Gorder$100greater promise No 362Supeecat BC Haff-APyfon Racer/sport ffmr aileron idevator control Foam sing -$200 meantime decided next sNo 365Seemastee BC Wtllards 40-size ttying boat 4-rh Strap-on gear fandplanet 2 shts-$1100 No 368space Shuttle B FE targer improved version Boo glider 3-rh$550outing would carry out extended No 370CAP21 BC GiantSrale French aerohatic craft spans 71/4 9 Quadra power 2 sheets dec$1400 278Me Spout U FE Fly Sport Pyfon NoviSportsman Paoern sheet sport Uses 4-dr 25-40 pwr$500taxi trials before attempting fly model oNo 379 m Spg Cf t Coorhat stdp large Ight super pertoniter-The throttle opening fixed give CJNo 383CaUsto 93 FE Fly sleek Nato mowing Salt plane AMA Mod tad thrfemfed classes-$750 o No366Laser 260 FE Sport Scale rephca 01 rhantyfooship Aerohafic flier uses 40 power 4-5dr 2sf9s$1075upper operating limit 60000 rpmwell No366US Mate BC I-loge gentle-lIving Styfane trainer sport Spans BOrn 00 errgsre 3-rh Tee shts-$1400 No 382Ciwisfiaphen FE Sport Scale porarhotist Two-dr set tories torso moves anon 425below maximum speed avail-No 383A Kioud King BC Reduced modernized verston 193ff design t2A Old-tatter 2cr 3dr-able No 294Ron Crow FF High-performance Quidoor Hand Launched Glider -$175 orNo386 yB CL t2A Racer lot MooseorScale Plans shewCoBtack Widow Spans 182/4 mV-tad$175 further trip Greenham Common Air aNo 396Lee-Rictueds FF Eledno-powered 020 Scale ring-sing oldie .$350 No398 flflcriarger Fouruhfa dnc$2225Base kind permission CO No396Zephyr 1100 FE AMA Ctoss B Sadplane 3-channel BC gear.made Again weather poor o No 401Royal Lancer FF Basic competitron wodid icr AMA Ctass uses stasdard-pertcrrttanre 15 engines $550 Z 0No 403Cub Ficalpiane BC Sport Scale tar OAg-tO-stce engines 4-dr BC J3 ffoats sa clanror$600time less critical - No 404Focke-Wuff 100 CL Proffie Scale tp.A power ieatarea anique engine mount icr erote reaienn$300 No405RegenflOnotOueSklesFEFuntopobiptarefor4060Power4-~f2ch -$1350only taxiing Gerry quite happy No 406Piper Coerancle CL Sport Scale uses 2Ss firroftle control 2 sheets$625 No407BoelngXFS8-l RCSpooScaiefori2Apower2-3drannelsgeneral ground handling qualities $600model decided give faster run a- taNo 406 ReVoff-Er BC elertuc power sport filer 2-chaneef 05 motor .. No409 Folikee Spin 16 PP Scale ot early monoplane trainer 049 power Three sheets plus dertallentatiotl- $825 410 pobee Plate BC Scale famous EAA plane 40-power 4-dr Bainid sport t$1200Acceleration considerably rapid $825 ~ Stunterbalndoor ~uh0rt lines $175than anyone predicted found No413 BonanasCLPtOStetonscaleStunterforlSto 25 engines PC scated-ap 1939 totter power tavonte $325 himself position having make No 414 Etecttic Sperimy BC ideduc powered ton tlmr 05 motor0000 reNo415 NawimerlkarrlceneNkl FEElectncpowerSportSraietort5mofcr3-4cham$1175instant decision Flying speed being 6 Stuntfire 60 CL Big 62-in-span Stonter 80-power - reached either engine shut 17 Spoetwagon JR BC Pulse-rudder uportsfer 02-power $300 No 418 Luton Minor BC Sport Scale model t930s Bn5sh Sgfintptane Icr 19-power 4-draminof PC $725 down flight made No 419 Dove 650 CL Coropetitien Stonter ior 40-46 power has foam wing slab $700 No426 Buck600FFCotllpe6tleOCtas5AorBfcrto-2t powerHassatialtle-arrtdettcetadVtT $600 Being man conviction faith No 421 Annes Plane CL WA traeter/sporfsfer rugged balsa faul-Suinlang Gerry e 9No422 Scooter tiC Two-Meter Saddarte has won Hats eveot 1992 t9fl3 plan Other contests$550ased back elevator stick No422 Cloud Cruiser FE Old-tatter takes 60-power 3-dr BC Two-piece wing OPSOn ler easy transport Two sheets $1275 immense surprise fortunate No 424 Good Tern PP Embryo Erinderance ruSher-power floatyfane has optional wheels strdr-attd-hssue delrgto $200 enough witness historic event No425 Skyrocket CL Pus-Scale sport tier tooks like Grummans on-none Navy twin moles hen 1P.M $325 wheels left ground After climbing 0 00 mmmmm mm mmmm m moothly away Bar-Jay flown U two complete circuits rcle numbers plans wish order brought gentle touchdown 193225239262282291299302 310It happened suddenly i31432332343348354358362365 368 some time enormity event 0I sink hardly believable Fortu 378379383386389392393394395Inately spectators armed video camera happenings 396398399401403404405406407408recorded posterityand team wE 10411412413414415416417418be able prove really did happen E 0 U Sunday March 20 1983 will remem 9 420421422423424425426427 428bered day model aero e includes first-class poStage Send ChBCk money order payable tonautical achievement attainedafter Model Aviation AMA 1810 Samuel MorSo Dr ReSton VA 22090I nearly 40 years quest Likely will se print carefullyEnclosed $ --_____ __I substantially change hobby few modelers may able use ajet turbine 4i NAME neif become available STREET_____- __ __-__commercidlly ___I significance achievement 5E CITY~ ____ ____ p modelers have NSTATE _____ ______________~ ZIP pioneering spirit accept challenge ______ ___________________ also determination carry through successful conclusion mmmmmmmmmmmmmmmmmmmmmmmmm 178 Model Aviation
Edition: Model Aviation - 1983/12
Page Numbers: 88, 89, 90, 174, 176, 177, 178
THE INFAMOUS Peace Ladies camped outsi4e Greenham Common Air Base England did seem too perturbed few score modelers cars lined-up enter main gate thing nearest re semblance Cruise missile motley assortment RC models packed rear some vehicles However cars model eyes least just revolutionary sophisti cated missile destined make historythough modeling history Sunday February 27 1983 day scheduled maiden flight RC model fitted genuine gas turbine jet engine true British tradition day cold wet windy following description efforts Gerry Jackman team produce practical model jet turbine engine gives some insight dedication small years mod elers have dreamed jet engine power true manner full-size airplanes wasnt until last March best knowledge someone actually flew RC model powered gas turbine en gine author pro vides first-hand account flight some background con cerning engines development U David Boddington 88 Model Aviation Top Designed Barry Beicher Bar-Jay successfully flown under power minia ture gas turbine let engine developed Gelry Jackmans team Flying weight around 16 lb Landing gear fixed prototype though future versions will include retracts Design includes twin booms high-mounted horizontal tail surfaces clear engines powerful jet blast Above victorious team Gerry Jackman center hard working assist ants L-R David Stitch Barry Baicher Jackman Chris White Ray Carter obscured group people prepared abandon project face setbacks frustrations disappointments Despite admonitions what attempting impossible realization various times throughout development period detractors might well right persisted plans stage dreams became reality past 35 years have arti cles written modeling magazines about model gas turbine enginessome purely theoretical others purporting based practical experiences few contributors have honest enough admit efforts crowned suc cess producing engine useful output experiments exciting Less forthright contributors tended give impression gas turbine engines built successfully run fitted flown models individual gall otfer plans instructions working jet turbine engineno working examples have seen date No photographic corroborative evidence presented prove RC model aircraft flown under power genuine gas turbine engine first pure jet aircraft flew 1939 Heinkel 178 Frank Whittle already carrying out test runs jet engine two years 1930 Whittle first took out patent form propulsion Perhaps surprising nearly 50 years after original design full-size gas turbine aircraft engine just reaching stage developing equivalent model size look few considerations involved pro ducing such engine will soon give insight goal has eluded engineers modelers long form jet engine has found favor modelers has pulsejet have us since 1950s Pulse-jets have big advantage have minimum working partsjust reed flap valves front combustion chamber Air introduced through valves mixed fuel mixture ignited spark plug After corn bustion completed gasses have expelled high velocity via tail pipe partial vacaum created com bustion chamber cycle repeated frequency pulses governed design shape combustion area tail pipe simple pulse-jet unfortunately ideal answer Scale modelers prayer jet engine Starting requires high-pressure blast air intake throttling qualities virtually zero noise levels sufficient put selfMounting brackets made aluminum alloy designed permit rapid removal engine inspection testing top engine fuel line returning preheating area carburetor Rear pipe temperature checked before putting cowl flight December 1983 89 engine revealed see course critical parts inside air inlet moulding fiberglass/epoxy engine cowling Bar-Jay fuselage Test sockets provided engine ground-monitoring compressor speeds tail pipe tempera ture Liquid propane fuel preheated beforeentering engine via twin fuel lines Cylindrical oil supply reservoir lubricate bearings situated just behind RC gear rear oil reservoir just visible airborne propane fuel tank holds enough about six minutes fliqht time ohotos author respecting heavy rock band shame Worse still sound doesnt resemble full-size jetexcept dreaded V-I flying bomb essential difference between ram jet pulse-jets ajet turbine engine latter uses compressor multi-stage axial compressors draw air com bustion chamber compress rotate compressor unit turbine wheel fitted common shaft gasses com bustion chamber pass through turbine blades turn complete compressor turbine assembly Part energy ab sorbed turbine remainder pro vides propulsive thrust jet engines based fundamental law physics states action equal reaction Combustion gasses expelled much higher velocity result compression heating combustion intake air velocity producing thrust big problems producing miniature jet turbine engine operating temperatures will region 6000C Another shaft speed compressor/turbine assembly may ap proaching 100000 rpm obtain workable thrust levels degree technological expertise required fields metal lurgy thermodynamics engineering considerable expanding team Gerry Jackman originator project decided build ajet turbine engine given little encouragement colleagues con sidered him loser Only determination obvious will succeed encouraged fel low modelers offer assistance Grad ually over past eight years strength team has increased inclusion specialist knowledge various facets technical design engi neering First offer services Barry Belcher aerodynamicist has responsible design Bar-Jay model used testbed latest en gine Barry also responsible major breakthrough designed revised turbine blade section improving static Continued page 174 90 Model Aviation Left The compressor blades can seen top right Underneath wing fillet tuel till overflow vents forward gear fitted abrasion brake acting tire Right View partial rear shows good fits expects well thought out design reservoir oil lubricate front rear shaft bearings engine can seen clearly picture well throttle servo Has four-channel Futaba controls trs . Ray Carter about connect propane fuel hose models fitting front model high-speed starter 24V motor geared turn up about 30000 rpm THIS FUEL FEATURES ORUST PREVENTION AGENTS ODETERGENTS OLUBRICAllON WITH HIGH FLASH POINTS sWElliNG AGENTS FOR MORE EFFICIENT AND DEPENDABLE RJEL FLOW OANTI-FOAMING AGENTS TO PREVENT LEAN RUNS KEEPS YOUR ENGINE RUNNING COOL sAN ODORLESS HIGHLY REFINED FUEL CHILDPROOF LIDS Available FAI 5 10 15 25 & AO% NiITo-Methane Contents Formulated synthetic lubriconts Also available castor DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT This competition fuel tast becoming THE CHOICE top profesionols first cash product Contact us price structures ordering information Manufacturers Major Brand Distributors Model Engines Kits Radios Accessories SUPER K Fuels brand KiNGS RADIO CONTROL HOBBIES INTERNATIONAL 3960 West 46 Ave Hialeah Florida 33042 305 557-2024 cross-grain tips rudders etc harder wood better grain should laid out run same direc tion span wing Make own plans Keep sketching top view until suitable draw side view along front tail views same scale Trace final top view onto selected board carbon paper below plan Redraw board ball-point pen dark pencil permanent imprint wood has inter esting grains along board might want select spot fall midfuselage location grain patterns finished wing will same both sides lucky can find boards swirls fall identically both wing halves Cut outline top view first want square sides top bottom board Once rough cut complete cut outside line allow errors sawcut bungles Dremel trim sand lines Next draw side views -in edge sim ply start carving until have removed excess wood down will file grind away remainder finished surfaces use No 50 production paper sand first smooth outline after filing done go No 120 followed final sanding No 220 wet-or-dry A-weight paper Dont strive too much detail unless expert finish can either natural wood makes fine model enjoy can make glossy spraying three coats Krylon Clear sanding No 220 wet-or-dry between coats have add rigging youll probably drilling holes Use nylon thread Mark location hole sharp pin wobble pin make starting place drill Drill handturning chuck power-drill could slip destroy few hours work almost impossible remove damaged areas sanding because wings already very thin case Whitehead 1901 No 21 carving Whitehead 1905 hang gliders nine-rib five-rib types rigging piece thread continuous pattern struts landing gear frame work pilot hang find popsicle sticks wooden forks French fries quite useful having strong grains structural needs Years age perhaps centuries Euro peans could afford fancy blown-glass ornaments Christmas trees make made orna ments curly shavings off car penters planewith much artistic imagination some glue SAFE FLYING IS NO ACCIDENT ornaments often accompanied other clevet attractive pieces such crib made nut shells infant figure bedded scraps cloth colors Animals skiing Santas host other wonderful wooden ornaments grew popularity exported over world Most made Germany Alps Copies now guessed made Hong Kong Airplane ornaments some thing can make enjoy Turbine/Boddington Continued oaae 90 thrust engine 20% Following turbine failure earlier enginesa traumatic cata strophic event served emphasize compiexitles dangers project Ray Carter brought work stress calculations engineering design Since time have no similar failures Ray has able advise special welding techniques pressed steel work prepare technical drawings recurring problem early engines failure rate shaft bearings speeds temperatures involved bearings would survive matter minutes full operating power Failures due partly high temperatures speeds serious contributing factor shafts whirlthe whipping oscil lation over unsupported length about 6 David Sitch bearings con sultant able advise cor rect selection bearings obtain combat shaft whirl correlation compressor design combustion chamber heat output nozzle ring turbine blade angle settings paramount importance efficient output small gas turbine engine points critical model-sized engines commercial-sized units efficiencies will result power outputs too low practical purposes Thermodynamic design considerations became responsibility Chris White has constantly striving refine design engine improve thermal efficiency produce useful thrust current development work aimed producing superior tail pipe design Whereas model aircraft can usually designed built will fly straight off building board no easy straightforward solutions constructing miniature gas turbine engine Gerry Jackman has phlegmatic tenacious personality freely admits eight years development have number occasions prospect eventual success appeared very remote Without support strong backup team proj ect may have faltered crisis suc ceeded another seemingly impassable complication have triumphed others have failed because have refused beaten have collective faith see job through end 174 Model Aviation specially formulated chemically balanced fuel top performance minimum engine wear weather condition PRODUCTS FOA~ Complete Line Exhaust Systems * Tuned Pipes led Tuned Pines * Headers * Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpassed WokmanshiD & Performance mtcfled Performance ystem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMERK&B SUPER POSY PAINT K&B MIXING CLIPS opinion no reason com mercial firm could have produced prac tical working jet turbine engine modelersprovided prepared invest thousands dollars de velopment experimental work Theirs has solo effort have received no assistance advice manufacturers designers full-size turbojet engines has amateurism highest pro fessional standards Design construction data view proprietary nature miniature gas turbine engine would unfair give detailed information design con struction unit After thousands hours research development work team naturally hopes recoup some re ward its efforts following brief comments will provide idea meth ods employed considerable technical barriers overcome Nimonic alloys stainless steel principal metals used construction engine Correct selection metals allow complimentary rates expansion closely-mating components vitally impor tant Equally important metals capable withstanding high stresses cer tain components tip speed com pressor 1100 ft per second high temperatures compressor ma chined high-quality duralumin dropforged material would have preferable couldnt easily obtained small quantity needed development prototypes Early attempts producing turbine wheel totally successful previ ously explained eventually nec essary construct special spark-eroding machine manufacture item tur bine takes 130 hours machining erod ing fumes dielectric fluid dur ing eroding process pretty obnoxious despite being perfumed Balancing compressor/turbine rotor has ultra pre cise rebalancing has carried out time bearing replaced Close-tolerance machining obviously needed project sophisticated gas MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler holiday season Standing 51/2 inches tall large 10 oz capacity its real attention getter definite colector piece years come ORDER NOW FOR THE HOLIDAYS ONLY $695 ER PLUS $200 POSTAGE & HANDLING PER ORDER RJL INDUSTRIES OX 5654 DENA CA 91107 795-9821 TAN COLORED OVEN GLAZED LIMITED PRODUCTION turbine engine work carried out Myford Super 7 lathe mod est commercial standards small mill ing machine typical power hand tools would expect find modelers well-stocked workshop present engine has tested over past 12 months concentrating initially obtaining reliable running im proving thrust levels Propane gas used bench running proved very suitable fuel engine fit ted model change made liquid propane storage vessel propane gas form too large bonus injecting liquid propane combustion chamber increased thermal efficiency engine disadvantage became difficult accurately meter fuel supply Rear bearings now survive accept able period proving team has able select correct bearings obtain reasonable operating temperatures rear end rotor shaft Temperature readings various points engine have monitored throughout test period Indeed total development has logical planned throughout eight years experimentation Temptations bolt unit temporary airframejust see whether would flyhave re sisted whole project has pro fessionally handled Good throttling respone feature engine although aircraft response power changes slow compared propeller-driven aircraft Shaft speeds 80-85000 rpm maximum result static thrusts 7 8 lb jet pipe tem peratures region 600-6500C comparison average internal combustion engine seems pretty pedestrian Greenbam Common debut Waiting rain cease least gave oppor tunity chatting Gerry Jackman before maiden flight attempted seemed remarkably relaxed com posed view circumstances wish get engine started aim model down runway watch make sky assured would make previous struggles 176 Model Aviation b p ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX A&A Industries AMA Membership Ace RC Inc Aero Tech RC . Air Tech Airtronics Phase Art ec Products Inc Americas Hobby Center b&r Hobbies Balsa USA Bavarian Precision Products Dave Brown Products Buckeye Balsa Buzzard Aircraft Byron Originals California Model Imports lina-Taffinder1 11 Johnnie Casburn Mfg27 Chevron153 Circus Hobbies86-87 Cleveland Model & Supply Co166 Condor Hobbies47 Consumers Guide RC Aircraft Prod. Consumers Hobby Corp150-151 Coverite 92 DA Enterprises26 D&D Engineering157 DG Products156 DGA Designs129136 DGM Industries177 Davey Systems Corp156 Larry Dodge Aero Inc140 Dougs Hobby Shop138-139 Du-Bro Products46 Dynathrust Props18 E&L Manufacturing84 Eastern Soaring Supply177 Addis Elmore159 Enys Model Engines nside Back Cover FAI Model Supply FHS Supply Inc Fab-Tek Inc Fabtronics Fiberglass Master Flite Line Products Flyline Models Fourmost Products Fox Mfg Co Full Command Systems14 Futaba Corp America93 163 98 53 154 132 140 82 91 4 92 140 141 152 Gator RC Products Giezendanner USA Carl Goldberg Models Gorham Model Products Great Lakes Model & Mold Great Planes Model Mfg Co Grish Brothers Art Gross Enterprises 14 9165 15 129 18 162 156 Hardware Systems William Hawke Heritage Models Inc Historic Aviation Hobby Barn Hobby Capitol Distributors Hobby Hideaway Hobby Horn 25 Hobby Lobby International Hobby Radio Shop Hobby Swap News 10 159 180 11 130-131 171 161 172 81 158 173 172 146-147 133 Ikon NWest Indy RC Sales International Modeler Show J-5 Enterprises Hi Johnson Model Products Jomar Products K&B Manufacturing Co K&S Engineering Kalee Inc Kin Craft Kings RC Hobbies Intl. K raft Systems Kustom Kraftsmanship Leisure Electronics n J Lind Co LoneStar Models 176 154 161 136 167174 49 171 164 Nor-Cal Aviaonics28 Ohio Superstar144 P&G Metal Products Pacer Technology & Resources Pacific Air Peck-Polymers Pica Products Polks Hobby Proctor Enterprises 157 179 173 161 136 155 4 RF Enterprises168 R LF Products177 RJL Industries176 Radio Equipment Exchange141 Radio South141 Redwood Hobby Imports172 Repla-Tech International141 Richardson Precision Machining172 Robbe Modellsport ide Front Cover 1 Roush Mfg Co 145 SR Batteries S&W Hobby Supply Saf-Flite Models 159Satellite City 160Scratch-A-Plane 157Seaglen Model Co Semco Sheldons Hobby Shop Sig Manufacturing Co St Croix Park Falls Ltd Sterling Models Swanson Associates T&D Fiberglass 173 Tatone Products 171 Taylor-Craft Ltd 137 Tide Distributors Inc Top Flite Models r Hobbies Twinn-K Inc.MACS Products MGA Enterprises Magus Model Aircraft 160 Majestic Models 170 Marks Models 148 George Marsden 158 Master Kit 176 McDaniel RCService 8 Jim Messers Quality Model Products 144 Midwest Model Supply Co 161 Midwest Products Co 169 Mills Airplane Models Model Rectifier Corp 176 145 148 173 51 26 137 160 171 41 23 132 29 134-135 Mutchlers Hobbies 92 82 177 160 24 167 170 83 142-143 13 158 28 157 144 83 156 19 149 175 82 VK Model Aircraft Bob Violett Models Vogel Aviation WE Technical Services iams Brothers Windsor Propeller Co World Engines 145 168 137 166 10 10 Back Cover Zenith Aviation Books5 Nick Ziroli Models132 153 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX worthwhile whole team would probably dissolve floods tears rain eventually ceased late afternoon Bar-Jay model quickly assembled numerous spectators moved safe position models fuel tank filled Looking down line critical spectatorsincluding some cynical prophets doomit impos sible admire courage Gerry inviting such gathering proposed maiden flight Anxious faces watched ignition plug energized starter applied nose cone Would fire life Starter speeds 25000 rpm required over come turbine losses speed reached could heard un mistakable jet turbine whine ignition took place Gradually pitch whine creased sound ex-jet-pilot pure music Surprisingly overall noise levels no means objectionable As engine built up full operating speed signs rough running almost though afterburner operating intermittently Just hatch about attached engine began die Further attempts starting engine resulted same erratic running Eventu ally efforts abandoned because GET ORGANIZED s set 4 sturdy tries thai holds over 4 yeas taoote 8 11 magazines 4 MAG FILES $495 Send 5495 p1058100 postage handling 0GM INDUOTNIES PO SOX 388-K DOVER NH 03880 December 1983 177 CUSTOM FOAM WINGS d IAIL CUS TOM SAILPLANE WINGSd TAILS SPRAY ADHESIVES FIBERGLASS FUSELAGES HI STARTS BALSA d PLYWOOD SEND 50 d 10 SASE FOR INFO ESS BOX 437 LEMONT PA /685/ P40 GAIl KIT FW.L COLOR EXACT REPRODUCTION heR pdea Sand Ta NOW00 REMEMBER HOW WELL THEY FLEW Spaniel nfl hatsda eases tar raeatakg sat StFm Madatap am Mmd Reansfi. Mt * *SAILPLANE* * launching equipment hi-starts/winches/accessories complete line/best pricesltop quality send self-addressed stamped envelope catalog/information RLF PRODUCTS R3 Box 178-Y PaoIi IN 47454812123-4310 impending darkness ____________________________________________________________[v32][b1588152171700]] say failure get model airborne disappointment spec tators stating obvious team __________________________________________________________must have devastating confidence venture would suc cess thwarted last No 426 China Clipper$2000minute RC Fantastic Sport Scale flying boat four 10-size engines 4-channel RO Three sheets no documentation Spans 74 in The sweet smell success tt did take No 427 Profiles$200long Gerry crew overcome FF Travelair Mystery Ship Miss Los Angeles profile all-balsa rubber mod- temporary setback soon els sport flying Wingspans 17 investigating reasons erratic runNo 428 Bearcat$525ning engine worked perfectly CL Big competition-caliber profile Precision Aerobatics plane 60 power on bench conclusion came No 131Gee Bee Modei Y 40-powered BC stand-off scale Ifre great old-tone racers$500 No 193Slillelto CL Stunt model McDonald winner 19761980 1982 FAI World champs$375was liquid propane fully No 225Ole Reliable BC 70 version 3ff old-toner REM controls 19-25$425 No 239Blue Beds RC Ken Willares formation plane 4-rh 10 vaporizing combustion chamber No 262Crasimusslee CL Crash-proof trainer 2 srzes 15-30 36-40$125secondary combustion taking place No262Gee Bee RC Granger Withams magnifrcent Model Z 40 engine$750 No291Csp2O dOpowered scale BC French aerohaff C plane Low wing tail-dragger2 sheetssothe jet pipe cure fuel feed line No269Gee Bee Sr Spoelsten RC t/4-scale Hafffte 91 finwer Prototype 5P 1175was taken around tail pipe preheat No 302Mini P18 FE Sarpolus 049 ducted fan sport f 2-rh Balsa wings tad tone strudore$275 No 3101930 Fleet Biplane RC Sport Orate icr 35-40 4-rh Wingspan 56 1/6 scale Two sheets$625fuel before injected com $375 No 314*e B BC Ken Wrflards flying boat 3-rh. 15-Power Ft7 wtttl rrtttoraltle ~bustion chambers Excessive pressure No326Tayice Cult PC Don Stolts schordyard-Scale 049s 2-2 CS Spans 50 te No 332Zepmye BC Soraif 2-rh glider br hand-launch tow thennid stope soadng$200 No 343Wasp Vi FF Mike Stoys Hats-winning Orddonr HEG$100built up fuel line first experi No348one RcTramerhasoeryforgfongffytnggsidtses3-dr 10-25power-$425ments further modifications showed No 354Menbyn FE Giant 155-in span Sadfdane uses 3 RC channels$750 No 358 Pieces FF Indoor Easy B RaSher-power contest-winner W Van Gorder$100greater promise No 362Supeecat BC Haff-APyfon Racer/sport ffmr aileron idevator control Foam sing -$200 meantime decided next sNo 365Seemastee BC Wtllards 40-size ttying boat 4-rh Strap-on gear fandplanet 2 shts-$1100 No 368space Shuttle B FE targer improved version Boo glider 3-rh$550outing would carry out extended No 370CAP21 BC GiantSrale French aerohatic craft spans 71/4 9 Quadra power 2 sheets dec$1400 278Me Spout U FE Fly Sport Pyfon NoviSportsman Paoern sheet sport Uses 4-dr 25-40 pwr$500taxi trials before attempting fly model oNo 379 m Spg Cf t Coorhat stdp large Ight super pertoniter-The throttle opening fixed give CJNo 383CaUsto 93 FE Fly sleek Nato mowing Salt plane AMA Mod tad thrfemfed classes-$750 o No366Laser 260 FE Sport Scale rephca 01 rhantyfooship Aerohafic flier uses 40 power 4-5dr 2sf9s$1075upper operating limit 60000 rpmwell No366US Mate BC I-loge gentle-lIving Styfane trainer sport Spans BOrn 00 errgsre 3-rh Tee shts-$1400 No 382Ciwisfiaphen FE Sport Scale porarhotist Two-dr set tories torso moves anon 425below maximum speed avail-No 383A Kioud King BC Reduced modernized verston 193ff design t2A Old-tatter 2cr 3dr-able No 294Ron Crow FF High-performance Quidoor Hand Launched Glider -$175 orNo386 yB CL t2A Racer lot MooseorScale Plans shewCoBtack Widow Spans 182/4 mV-tad$175 further trip Greenham Common Air aNo 396Lee-Rictueds FF Eledno-powered 020 Scale ring-sing oldie .$350 No398 flflcriarger Fouruhfa dnc$2225Base kind permission CO No396Zephyr 1100 FE AMA Ctoss B Sadplane 3-channel BC gear.made Again weather poor o No 401Royal Lancer FF Basic competitron wodid icr AMA Ctass uses stasdard-pertcrrttanre 15 engines $550 Z 0No 403Cub Ficalpiane BC Sport Scale tar OAg-tO-stce engines 4-dr BC J3 ffoats sa clanror$600time less critical - No 404Focke-Wuff 100 CL Proffie Scale tp.A power ieatarea anique engine mount icr erote reaienn$300 No405RegenflOnotOueSklesFEFuntopobiptarefor4060Power4-~f2ch -$1350only taxiing Gerry quite happy No 406Piper Coerancle CL Sport Scale uses 2Ss firroftle control 2 sheets$625 No407BoelngXFS8-l RCSpooScaiefori2Apower2-3drannelsgeneral ground handling qualities $600model decided give faster run a- taNo 406 ReVoff-Er BC elertuc power sport filer 2-chaneef 05 motor .. No409 Folikee Spin 16 PP Scale ot early monoplane trainer 049 power Three sheets plus dertallentatiotl- $825 410 pobee Plate BC Scale famous EAA plane 40-power 4-dr Bainid sport t$1200Acceleration considerably rapid $825 ~ Stunterbalndoor ~uh0rt lines $175than anyone predicted found No413 BonanasCLPtOStetonscaleStunterforlSto 25 engines PC scated-ap 1939 totter power tavonte $325 himself position having make No 414 Etecttic Sperimy BC ideduc powered ton tlmr 05 motor0000 reNo415 NawimerlkarrlceneNkl FEElectncpowerSportSraietort5mofcr3-4cham$1175instant decision Flying speed being 6 Stuntfire 60 CL Big 62-in-span Stonter 80-power - reached either engine shut 17 Spoetwagon JR BC Pulse-rudder uportsfer 02-power $300 No 418 Luton Minor BC Sport Scale model t930s Bn5sh Sgfintptane Icr 19-power 4-draminof PC $725 down flight made No 419 Dove 650 CL Coropetitien Stonter ior 40-46 power has foam wing slab $700 No426 Buck600FFCotllpe6tleOCtas5AorBfcrto-2t powerHassatialtle-arrtdettcetadVtT $600 Being man conviction faith No 421 Annes Plane CL WA traeter/sporfsfer rugged balsa faul-Suinlang Gerry e 9No422 Scooter tiC Two-Meter Saddarte has won Hats eveot 1992 t9fl3 plan Other contests$550ased back elevator stick No422 Cloud Cruiser FE Old-tatter takes 60-power 3-dr BC Two-piece wing OPSOn ler easy transport Two sheets $1275 immense surprise fortunate No 424 Good Tern PP Embryo Erinderance ruSher-power floatyfane has optional wheels strdr-attd-hssue delrgto $200 enough witness historic event No425 Skyrocket CL Pus-Scale sport tier tooks like Grummans on-none Navy twin moles hen 1P.M $325 wheels left ground After climbing 0 00 mmmmm mm mmmm m moothly away Bar-Jay flown U two complete circuits rcle numbers plans wish order brought gentle touchdown 193225239262282291299302 310It happened suddenly i31432332343348354358362365 368 some time enormity event 0I sink hardly believable Fortu 378379383386389392393394395Inately spectators armed video camera happenings 396398399401403404405406407408recorded posterityand team wE 10411412413414415416417418be able prove really did happen E 0 U Sunday March 20 1983 will remem 9 420421422423424425426427 428bered day model aero e includes first-class poStage Send ChBCk money order payable tonautical achievement attainedafter Model Aviation AMA 1810 Samuel MorSo Dr ReSton VA 22090I nearly 40 years quest Likely will se print carefullyEnclosed $ --_____ __I substantially change hobby few modelers may able use ajet turbine 4i NAME neif become available STREET_____- __ __-__commercidlly ___I significance achievement 5E CITY~ ____ ____ p modelers have NSTATE _____ ______________~ ZIP pioneering spirit accept challenge ______ ___________________ also determination carry through successful conclusion mmmmmmmmmmmmmmmmmmmmmmmmm 178 Model Aviation
Edition: Model Aviation - 1983/12
Page Numbers: 88, 89, 90, 174, 176, 177, 178
THE INFAMOUS Peace Ladies camped outsi4e Greenham Common Air Base England did seem too perturbed few score modelers cars lined-up enter main gate thing nearest re semblance Cruise missile motley assortment RC models packed rear some vehicles However cars model eyes least just revolutionary sophisti cated missile destined make historythough modeling history Sunday February 27 1983 day scheduled maiden flight RC model fitted genuine gas turbine jet engine true British tradition day cold wet windy following description efforts Gerry Jackman team produce practical model jet turbine engine gives some insight dedication small years mod elers have dreamed jet engine power true manner full-size airplanes wasnt until last March best knowledge someone actually flew RC model powered gas turbine en gine author pro vides first-hand account flight some background con cerning engines development U David Boddington 88 Model Aviation Top Designed Barry Beicher Bar-Jay successfully flown under power minia ture gas turbine let engine developed Gelry Jackmans team Flying weight around 16 lb Landing gear fixed prototype though future versions will include retracts Design includes twin booms high-mounted horizontal tail surfaces clear engines powerful jet blast Above victorious team Gerry Jackman center hard working assist ants L-R David Stitch Barry Baicher Jackman Chris White Ray Carter obscured group people prepared abandon project face setbacks frustrations disappointments Despite admonitions what attempting impossible realization various times throughout development period detractors might well right persisted plans stage dreams became reality past 35 years have arti cles written modeling magazines about model gas turbine enginessome purely theoretical others purporting based practical experiences few contributors have honest enough admit efforts crowned suc cess producing engine useful output experiments exciting Less forthright contributors tended give impression gas turbine engines built successfully run fitted flown models individual gall otfer plans instructions working jet turbine engineno working examples have seen date No photographic corroborative evidence presented prove RC model aircraft flown under power genuine gas turbine engine first pure jet aircraft flew 1939 Heinkel 178 Frank Whittle already carrying out test runs jet engine two years 1930 Whittle first took out patent form propulsion Perhaps surprising nearly 50 years after original design full-size gas turbine aircraft engine just reaching stage developing equivalent model size look few considerations involved pro ducing such engine will soon give insight goal has eluded engineers modelers long form jet engine has found favor modelers has pulsejet have us since 1950s Pulse-jets have big advantage have minimum working partsjust reed flap valves front combustion chamber Air introduced through valves mixed fuel mixture ignited spark plug After corn bustion completed gasses have expelled high velocity via tail pipe partial vacaum created com bustion chamber cycle repeated frequency pulses governed design shape combustion area tail pipe simple pulse-jet unfortunately ideal answer Scale modelers prayer jet engine Starting requires high-pressure blast air intake throttling qualities virtually zero noise levels sufficient put selfMounting brackets made aluminum alloy designed permit rapid removal engine inspection testing top engine fuel line returning preheating area carburetor Rear pipe temperature checked before putting cowl flight December 1983 89 engine revealed see course critical parts inside air inlet moulding fiberglass/epoxy engine cowling Bar-Jay fuselage Test sockets provided engine ground-monitoring compressor speeds tail pipe tempera ture Liquid propane fuel preheated beforeentering engine via twin fuel lines Cylindrical oil supply reservoir lubricate bearings situated just behind RC gear rear oil reservoir just visible airborne propane fuel tank holds enough about six minutes fliqht time ohotos author respecting heavy rock band shame Worse still sound doesnt resemble full-size jetexcept dreaded V-I flying bomb essential difference between ram jet pulse-jets ajet turbine engine latter uses compressor multi-stage axial compressors draw air com bustion chamber compress rotate compressor unit turbine wheel fitted common shaft gasses com bustion chamber pass through turbine blades turn complete compressor turbine assembly Part energy ab sorbed turbine remainder pro vides propulsive thrust jet engines based fundamental law physics states action equal reaction Combustion gasses expelled much higher velocity result compression heating combustion intake air velocity producing thrust big problems producing miniature jet turbine engine operating temperatures will region 6000C Another shaft speed compressor/turbine assembly may ap proaching 100000 rpm obtain workable thrust levels degree technological expertise required fields metal lurgy thermodynamics engineering considerable expanding team Gerry Jackman originator project decided build ajet turbine engine given little encouragement colleagues con sidered him loser Only determination obvious will succeed encouraged fel low modelers offer assistance Grad ually over past eight years strength team has increased inclusion specialist knowledge various facets technical design engi neering First offer services Barry Belcher aerodynamicist has responsible design Bar-Jay model used testbed latest en gine Barry also responsible major breakthrough designed revised turbine blade section improving static Continued page 174 90 Model Aviation Left The compressor blades can seen top right Underneath wing fillet tuel till overflow vents forward gear fitted abrasion brake acting tire Right View partial rear shows good fits expects well thought out design reservoir oil lubricate front rear shaft bearings engine can seen clearly picture well throttle servo Has four-channel Futaba controls trs . Ray Carter about connect propane fuel hose models fitting front model high-speed starter 24V motor geared turn up about 30000 rpm THIS FUEL FEATURES ORUST PREVENTION AGENTS ODETERGENTS OLUBRICAllON WITH HIGH FLASH POINTS sWElliNG AGENTS FOR MORE EFFICIENT AND DEPENDABLE RJEL FLOW OANTI-FOAMING AGENTS TO PREVENT LEAN RUNS KEEPS YOUR ENGINE RUNNING COOL sAN ODORLESS HIGHLY REFINED FUEL CHILDPROOF LIDS Available FAI 5 10 15 25 & AO% NiITo-Methane Contents Formulated synthetic lubriconts Also available castor DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT This competition fuel tast becoming THE CHOICE top profesionols first cash product Contact us price structures ordering information Manufacturers Major Brand Distributors Model Engines Kits Radios Accessories SUPER K Fuels brand KiNGS RADIO CONTROL HOBBIES INTERNATIONAL 3960 West 46 Ave Hialeah Florida 33042 305 557-2024 cross-grain tips rudders etc harder wood better grain should laid out run same direc tion span wing Make own plans Keep sketching top view until suitable draw side view along front tail views same scale Trace final top view onto selected board carbon paper below plan Redraw board ball-point pen dark pencil permanent imprint wood has inter esting grains along board might want select spot fall midfuselage location grain patterns finished wing will same both sides lucky can find boards swirls fall identically both wing halves Cut outline top view first want square sides top bottom board Once rough cut complete cut outside line allow errors sawcut bungles Dremel trim sand lines Next draw side views -in edge sim ply start carving until have removed excess wood down will file grind away remainder finished surfaces use No 50 production paper sand first smooth outline after filing done go No 120 followed final sanding No 220 wet-or-dry A-weight paper Dont strive too much detail unless expert finish can either natural wood makes fine model enjoy can make glossy spraying three coats Krylon Clear sanding No 220 wet-or-dry between coats have add rigging youll probably drilling holes Use nylon thread Mark location hole sharp pin wobble pin make starting place drill Drill handturning chuck power-drill could slip destroy few hours work almost impossible remove damaged areas sanding because wings already very thin case Whitehead 1901 No 21 carving Whitehead 1905 hang gliders nine-rib five-rib types rigging piece thread continuous pattern struts landing gear frame work pilot hang find popsicle sticks wooden forks French fries quite useful having strong grains structural needs Years age perhaps centuries Euro peans could afford fancy blown-glass ornaments Christmas trees make made orna ments curly shavings off car penters planewith much artistic imagination some glue SAFE FLYING IS NO ACCIDENT ornaments often accompanied other clevet attractive pieces such crib made nut shells infant figure bedded scraps cloth colors Animals skiing Santas host other wonderful wooden ornaments grew popularity exported over world Most made Germany Alps Copies now guessed made Hong Kong Airplane ornaments some thing can make enjoy Turbine/Boddington Continued oaae 90 thrust engine 20% Following turbine failure earlier enginesa traumatic cata strophic event served emphasize compiexitles dangers project Ray Carter brought work stress calculations engineering design Since time have no similar failures Ray has able advise special welding techniques pressed steel work prepare technical drawings recurring problem early engines failure rate shaft bearings speeds temperatures involved bearings would survive matter minutes full operating power Failures due partly high temperatures speeds serious contributing factor shafts whirlthe whipping oscil lation over unsupported length about 6 David Sitch bearings con sultant able advise cor rect selection bearings obtain combat shaft whirl correlation compressor design combustion chamber heat output nozzle ring turbine blade angle settings paramount importance efficient output small gas turbine engine points critical model-sized engines commercial-sized units efficiencies will result power outputs too low practical purposes Thermodynamic design considerations became responsibility Chris White has constantly striving refine design engine improve thermal efficiency produce useful thrust current development work aimed producing superior tail pipe design Whereas model aircraft can usually designed built will fly straight off building board no easy straightforward solutions constructing miniature gas turbine engine Gerry Jackman has phlegmatic tenacious personality freely admits eight years development have number occasions prospect eventual success appeared very remote Without support strong backup team proj ect may have faltered crisis suc ceeded another seemingly impassable complication have triumphed others have failed because have refused beaten have collective faith see job through end 174 Model Aviation specially formulated chemically balanced fuel top performance minimum engine wear weather condition PRODUCTS FOA~ Complete Line Exhaust Systems * Tuned Pipes led Tuned Pines * Headers * Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpassed WokmanshiD & Performance mtcfled Performance ystem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMERK&B SUPER POSY PAINT K&B MIXING CLIPS opinion no reason com mercial firm could have produced prac tical working jet turbine engine modelersprovided prepared invest thousands dollars de velopment experimental work Theirs has solo effort have received no assistance advice manufacturers designers full-size turbojet engines has amateurism highest pro fessional standards Design construction data view proprietary nature miniature gas turbine engine would unfair give detailed information design con struction unit After thousands hours research development work team naturally hopes recoup some re ward its efforts following brief comments will provide idea meth ods employed considerable technical barriers overcome Nimonic alloys stainless steel principal metals used construction engine Correct selection metals allow complimentary rates expansion closely-mating components vitally impor tant Equally important metals capable withstanding high stresses cer tain components tip speed com pressor 1100 ft per second high temperatures compressor ma chined high-quality duralumin dropforged material would have preferable couldnt easily obtained small quantity needed development prototypes Early attempts producing turbine wheel totally successful previ ously explained eventually nec essary construct special spark-eroding machine manufacture item tur bine takes 130 hours machining erod ing fumes dielectric fluid dur ing eroding process pretty obnoxious despite being perfumed Balancing compressor/turbine rotor has ultra pre cise rebalancing has carried out time bearing replaced Close-tolerance machining obviously needed project sophisticated gas MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler holiday season Standing 51/2 inches tall large 10 oz capacity its real attention getter definite colector piece years come ORDER NOW FOR THE HOLIDAYS ONLY $695 ER PLUS $200 POSTAGE & HANDLING PER ORDER RJL INDUSTRIES OX 5654 DENA CA 91107 795-9821 TAN COLORED OVEN GLAZED LIMITED PRODUCTION turbine engine work carried out Myford Super 7 lathe mod est commercial standards small mill ing machine typical power hand tools would expect find modelers well-stocked workshop present engine has tested over past 12 months concentrating initially obtaining reliable running im proving thrust levels Propane gas used bench running proved very suitable fuel engine fit ted model change made liquid propane storage vessel propane gas form too large bonus injecting liquid propane combustion chamber increased thermal efficiency engine disadvantage became difficult accurately meter fuel supply Rear bearings now survive accept able period proving team has able select correct bearings obtain reasonable operating temperatures rear end rotor shaft Temperature readings various points engine have monitored throughout test period Indeed total development has logical planned throughout eight years experimentation Temptations bolt unit temporary airframejust see whether would flyhave re sisted whole project has pro fessionally handled Good throttling respone feature engine although aircraft response power changes slow compared propeller-driven aircraft Shaft speeds 80-85000 rpm maximum result static thrusts 7 8 lb jet pipe tem peratures region 600-6500C comparison average internal combustion engine seems pretty pedestrian Greenbam Common debut Waiting rain cease least gave oppor tunity chatting Gerry Jackman before maiden flight attempted seemed remarkably relaxed com posed view circumstances wish get engine started aim model down runway watch make sky assured would make previous struggles 176 Model Aviation b p ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX A&A Industries AMA Membership Ace RC Inc Aero Tech RC . Air Tech Airtronics Phase Art ec Products Inc Americas Hobby Center b&r Hobbies Balsa USA Bavarian Precision Products Dave Brown Products Buckeye Balsa Buzzard Aircraft Byron Originals California Model Imports lina-Taffinder1 11 Johnnie Casburn Mfg27 Chevron153 Circus Hobbies86-87 Cleveland Model & Supply Co166 Condor Hobbies47 Consumers Guide RC Aircraft Prod. Consumers Hobby Corp150-151 Coverite 92 DA Enterprises26 D&D Engineering157 DG Products156 DGA Designs129136 DGM Industries177 Davey Systems Corp156 Larry Dodge Aero Inc140 Dougs Hobby Shop138-139 Du-Bro Products46 Dynathrust Props18 E&L Manufacturing84 Eastern Soaring Supply177 Addis Elmore159 Enys Model Engines nside Back Cover FAI Model Supply FHS Supply Inc Fab-Tek Inc Fabtronics Fiberglass Master Flite Line Products Flyline Models Fourmost Products Fox Mfg Co Full Command Systems14 Futaba Corp America93 163 98 53 154 132 140 82 91 4 92 140 141 152 Gator RC Products Giezendanner USA Carl Goldberg Models Gorham Model Products Great Lakes Model & Mold Great Planes Model Mfg Co Grish Brothers Art Gross Enterprises 14 9165 15 129 18 162 156 Hardware Systems William Hawke Heritage Models Inc Historic Aviation Hobby Barn Hobby Capitol Distributors Hobby Hideaway Hobby Horn 25 Hobby Lobby International Hobby Radio Shop Hobby Swap News 10 159 180 11 130-131 171 161 172 81 158 173 172 146-147 133 Ikon NWest Indy RC Sales International Modeler Show J-5 Enterprises Hi Johnson Model Products Jomar Products K&B Manufacturing Co K&S Engineering Kalee Inc Kin Craft Kings RC Hobbies Intl. K raft Systems Kustom Kraftsmanship Leisure Electronics n J Lind Co LoneStar Models 176 154 161 136 167174 49 171 164 Nor-Cal Aviaonics28 Ohio Superstar144 P&G Metal Products Pacer Technology & Resources Pacific Air Peck-Polymers Pica Products Polks Hobby Proctor Enterprises 157 179 173 161 136 155 4 RF Enterprises168 R LF Products177 RJL Industries176 Radio Equipment Exchange141 Radio South141 Redwood Hobby Imports172 Repla-Tech International141 Richardson Precision Machining172 Robbe Modellsport ide Front Cover 1 Roush Mfg Co 145 SR Batteries S&W Hobby Supply Saf-Flite Models 159Satellite City 160Scratch-A-Plane 157Seaglen Model Co Semco Sheldons Hobby Shop Sig Manufacturing Co St Croix Park Falls Ltd Sterling Models Swanson Associates T&D Fiberglass 173 Tatone Products 171 Taylor-Craft Ltd 137 Tide Distributors Inc Top Flite Models r Hobbies Twinn-K Inc.MACS Products MGA Enterprises Magus Model Aircraft 160 Majestic Models 170 Marks Models 148 George Marsden 158 Master Kit 176 McDaniel RCService 8 Jim Messers Quality Model Products 144 Midwest Model Supply Co 161 Midwest Products Co 169 Mills Airplane Models Model Rectifier Corp 176 145 148 173 51 26 137 160 171 41 23 132 29 134-135 Mutchlers Hobbies 92 82 177 160 24 167 170 83 142-143 13 158 28 157 144 83 156 19 149 175 82 VK Model Aircraft Bob Violett Models Vogel Aviation WE Technical Services iams Brothers Windsor Propeller Co World Engines 145 168 137 166 10 10 Back Cover Zenith Aviation Books5 Nick Ziroli Models132 153 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX worthwhile whole team would probably dissolve floods tears rain eventually ceased late afternoon Bar-Jay model quickly assembled numerous spectators moved safe position models fuel tank filled Looking down line critical spectatorsincluding some cynical prophets doomit impos sible admire courage Gerry inviting such gathering proposed maiden flight Anxious faces watched ignition plug energized starter applied nose cone Would fire life Starter speeds 25000 rpm required over come turbine losses speed reached could heard un mistakable jet turbine whine ignition took place Gradually pitch whine creased sound ex-jet-pilot pure music Surprisingly overall noise levels no means objectionable As engine built up full operating speed signs rough running almost though afterburner operating intermittently Just hatch about attached engine began die Further attempts starting engine resulted same erratic running Eventu ally efforts abandoned because GET ORGANIZED s set 4 sturdy tries thai holds over 4 yeas taoote 8 11 magazines 4 MAG FILES $495 Send 5495 p1058100 postage handling 0GM INDUOTNIES PO SOX 388-K DOVER NH 03880 December 1983 177 CUSTOM FOAM WINGS d IAIL CUS TOM SAILPLANE WINGSd TAILS SPRAY ADHESIVES FIBERGLASS FUSELAGES HI STARTS BALSA d PLYWOOD SEND 50 d 10 SASE FOR INFO ESS BOX 437 LEMONT PA /685/ P40 GAIl KIT FW.L COLOR EXACT REPRODUCTION heR pdea Sand Ta NOW00 REMEMBER HOW WELL THEY FLEW Spaniel nfl hatsda eases tar raeatakg sat StFm Madatap am Mmd Reansfi. Mt * *SAILPLANE* * launching equipment hi-starts/winches/accessories complete line/best pricesltop quality send self-addressed stamped envelope catalog/information RLF PRODUCTS R3 Box 178-Y PaoIi IN 47454812123-4310 impending darkness ____________________________________________________________[v32][b1588152171700]] say failure get model airborne disappointment spec tators stating obvious team __________________________________________________________must have devastating confidence venture would suc cess thwarted last No 426 China Clipper$2000minute RC Fantastic Sport Scale flying boat four 10-size engines 4-channel RO Three sheets no documentation Spans 74 in The sweet smell success tt did take No 427 Profiles$200long Gerry crew overcome FF Travelair Mystery Ship Miss Los Angeles profile all-balsa rubber mod- temporary setback soon els sport flying Wingspans 17 investigating reasons erratic runNo 428 Bearcat$525ning engine worked perfectly CL Big competition-caliber profile Precision Aerobatics plane 60 power on bench conclusion came No 131Gee Bee Modei Y 40-powered BC stand-off scale Ifre great old-tone racers$500 No 193Slillelto CL Stunt model McDonald winner 19761980 1982 FAI World champs$375was liquid propane fully No 225Ole Reliable BC 70 version 3ff old-toner REM controls 19-25$425 No 239Blue Beds RC Ken Willares formation plane 4-rh 10 vaporizing combustion chamber No 262Crasimusslee CL Crash-proof trainer 2 srzes 15-30 36-40$125secondary combustion taking place No262Gee Bee RC Granger Withams magnifrcent Model Z 40 engine$750 No291Csp2O dOpowered scale BC French aerohaff C plane Low wing tail-dragger2 sheetssothe jet pipe cure fuel feed line No269Gee Bee Sr Spoelsten RC t/4-scale Hafffte 91 finwer Prototype 5P 1175was taken around tail pipe preheat No 302Mini P18 FE Sarpolus 049 ducted fan sport f 2-rh Balsa wings tad tone strudore$275 No 3101930 Fleet Biplane RC Sport Orate icr 35-40 4-rh Wingspan 56 1/6 scale Two sheets$625fuel before injected com $375 No 314*e B BC Ken Wrflards flying boat 3-rh. 15-Power Ft7 wtttl rrtttoraltle ~bustion chambers Excessive pressure No326Tayice Cult PC Don Stolts schordyard-Scale 049s 2-2 CS Spans 50 te No 332Zepmye BC Soraif 2-rh glider br hand-launch tow thennid stope soadng$200 No 343Wasp Vi FF Mike Stoys Hats-winning Orddonr HEG$100built up fuel line first experi No348one RcTramerhasoeryforgfongffytnggsidtses3-dr 10-25power-$425ments further modifications showed No 354Menbyn FE Giant 155-in span Sadfdane uses 3 RC channels$750 No 358 Pieces FF Indoor Easy B RaSher-power contest-winner W Van Gorder$100greater promise No 362Supeecat BC Haff-APyfon Racer/sport ffmr aileron idevator control Foam sing -$200 meantime decided next sNo 365Seemastee BC Wtllards 40-size ttying boat 4-rh Strap-on gear fandplanet 2 shts-$1100 No 368space Shuttle B FE targer improved version Boo glider 3-rh$550outing would carry out extended No 370CAP21 BC GiantSrale French aerohatic craft spans 71/4 9 Quadra power 2 sheets dec$1400 278Me Spout U FE Fly Sport Pyfon NoviSportsman Paoern sheet sport Uses 4-dr 25-40 pwr$500taxi trials before attempting fly model oNo 379 m Spg Cf t Coorhat stdp large Ight super pertoniter-The throttle opening fixed give CJNo 383CaUsto 93 FE Fly sleek Nato mowing Salt plane AMA Mod tad thrfemfed classes-$750 o No366Laser 260 FE Sport Scale rephca 01 rhantyfooship Aerohafic flier uses 40 power 4-5dr 2sf9s$1075upper operating limit 60000 rpmwell No366US Mate BC I-loge gentle-lIving Styfane trainer sport Spans BOrn 00 errgsre 3-rh Tee shts-$1400 No 382Ciwisfiaphen FE Sport Scale porarhotist Two-dr set tories torso moves anon 425below maximum speed avail-No 383A Kioud King BC Reduced modernized verston 193ff design t2A Old-tatter 2cr 3dr-able No 294Ron Crow FF High-performance Quidoor Hand Launched Glider -$175 orNo386 yB CL t2A Racer lot MooseorScale Plans shewCoBtack Widow Spans 182/4 mV-tad$175 further trip Greenham Common Air aNo 396Lee-Rictueds FF Eledno-powered 020 Scale ring-sing oldie .$350 No398 flflcriarger Fouruhfa dnc$2225Base kind permission CO No396Zephyr 1100 FE AMA Ctoss B Sadplane 3-channel BC gear.made Again weather poor o No 401Royal Lancer FF Basic competitron wodid icr AMA Ctass uses stasdard-pertcrrttanre 15 engines $550 Z 0No 403Cub Ficalpiane BC Sport Scale tar OAg-tO-stce engines 4-dr BC J3 ffoats sa clanror$600time less critical - No 404Focke-Wuff 100 CL Proffie Scale tp.A power ieatarea anique engine mount icr erote reaienn$300 No405RegenflOnotOueSklesFEFuntopobiptarefor4060Power4-~f2ch -$1350only taxiing Gerry quite happy No 406Piper Coerancle CL Sport Scale uses 2Ss firroftle control 2 sheets$625 No407BoelngXFS8-l RCSpooScaiefori2Apower2-3drannelsgeneral ground handling qualities $600model decided give faster run a- taNo 406 ReVoff-Er BC elertuc power sport filer 2-chaneef 05 motor .. No409 Folikee Spin 16 PP Scale ot early monoplane trainer 049 power Three sheets plus dertallentatiotl- $825 410 pobee Plate BC Scale famous EAA plane 40-power 4-dr Bainid sport t$1200Acceleration considerably rapid $825 ~ Stunterbalndoor ~uh0rt lines $175than anyone predicted found No413 BonanasCLPtOStetonscaleStunterforlSto 25 engines PC scated-ap 1939 totter power tavonte $325 himself position having make No 414 Etecttic Sperimy BC ideduc powered ton tlmr 05 motor0000 reNo415 NawimerlkarrlceneNkl FEElectncpowerSportSraietort5mofcr3-4cham$1175instant decision Flying speed being 6 Stuntfire 60 CL Big 62-in-span Stonter 80-power - reached either engine shut 17 Spoetwagon JR BC Pulse-rudder uportsfer 02-power $300 No 418 Luton Minor BC Sport Scale model t930s Bn5sh Sgfintptane Icr 19-power 4-draminof PC $725 down flight made No 419 Dove 650 CL Coropetitien Stonter ior 40-46 power has foam wing slab $700 No426 Buck600FFCotllpe6tleOCtas5AorBfcrto-2t powerHassatialtle-arrtdettcetadVtT $600 Being man conviction faith No 421 Annes Plane CL WA traeter/sporfsfer rugged balsa faul-Suinlang Gerry e 9No422 Scooter tiC Two-Meter Saddarte has won Hats eveot 1992 t9fl3 plan Other contests$550ased back elevator stick No422 Cloud Cruiser FE Old-tatter takes 60-power 3-dr BC Two-piece wing OPSOn ler easy transport Two sheets $1275 immense surprise fortunate No 424 Good Tern PP Embryo Erinderance ruSher-power floatyfane has optional wheels strdr-attd-hssue delrgto $200 enough witness historic event No425 Skyrocket CL Pus-Scale sport tier tooks like Grummans on-none Navy twin moles hen 1P.M $325 wheels left ground After climbing 0 00 mmmmm mm mmmm m moothly away Bar-Jay flown U two complete circuits rcle numbers plans wish order brought gentle touchdown 193225239262282291299302 310It happened suddenly i31432332343348354358362365 368 some time enormity event 0I sink hardly believable Fortu 378379383386389392393394395Inately spectators armed video camera happenings 396398399401403404405406407408recorded posterityand team wE 10411412413414415416417418be able prove really did happen E 0 U Sunday March 20 1983 will remem 9 420421422423424425426427 428bered day model aero e includes first-class poStage Send ChBCk money order payable tonautical achievement attainedafter Model Aviation AMA 1810 Samuel MorSo Dr ReSton VA 22090I nearly 40 years quest Likely will se print carefullyEnclosed $ --_____ __I substantially change hobby few modelers may able use ajet turbine 4i NAME neif become available STREET_____- __ __-__commercidlly ___I significance achievement 5E CITY~ ____ ____ p modelers have NSTATE _____ ______________~ ZIP pioneering spirit accept challenge ______ ___________________ also determination carry through successful conclusion mmmmmmmmmmmmmmmmmmmmmmmmm 178 Model Aviation
Edition: Model Aviation - 1983/12
Page Numbers: 88, 89, 90, 174, 176, 177, 178
THE INFAMOUS Peace Ladies camped outsi4e Greenham Common Air Base England did seem too perturbed few score modelers cars lined-up enter main gate thing nearest re semblance Cruise missile motley assortment RC models packed rear some vehicles However cars model eyes least just revolutionary sophisti cated missile destined make historythough modeling history Sunday February 27 1983 day scheduled maiden flight RC model fitted genuine gas turbine jet engine true British tradition day cold wet windy following description efforts Gerry Jackman team produce practical model jet turbine engine gives some insight dedication small years mod elers have dreamed jet engine power true manner full-size airplanes wasnt until last March best knowledge someone actually flew RC model powered gas turbine en gine author pro vides first-hand account flight some background con cerning engines development U David Boddington 88 Model Aviation Top Designed Barry Beicher Bar-Jay successfully flown under power minia ture gas turbine let engine developed Gelry Jackmans team Flying weight around 16 lb Landing gear fixed prototype though future versions will include retracts Design includes twin booms high-mounted horizontal tail surfaces clear engines powerful jet blast Above victorious team Gerry Jackman center hard working assist ants L-R David Stitch Barry Baicher Jackman Chris White Ray Carter obscured group people prepared abandon project face setbacks frustrations disappointments Despite admonitions what attempting impossible realization various times throughout development period detractors might well right persisted plans stage dreams became reality past 35 years have arti cles written modeling magazines about model gas turbine enginessome purely theoretical others purporting based practical experiences few contributors have honest enough admit efforts crowned suc cess producing engine useful output experiments exciting Less forthright contributors tended give impression gas turbine engines built successfully run fitted flown models individual gall otfer plans instructions working jet turbine engineno working examples have seen date No photographic corroborative evidence presented prove RC model aircraft flown under power genuine gas turbine engine first pure jet aircraft flew 1939 Heinkel 178 Frank Whittle already carrying out test runs jet engine two years 1930 Whittle first took out patent form propulsion Perhaps surprising nearly 50 years after original design full-size gas turbine aircraft engine just reaching stage developing equivalent model size look few considerations involved pro ducing such engine will soon give insight goal has eluded engineers modelers long form jet engine has found favor modelers has pulsejet have us since 1950s Pulse-jets have big advantage have minimum working partsjust reed flap valves front combustion chamber Air introduced through valves mixed fuel mixture ignited spark plug After corn bustion completed gasses have expelled high velocity via tail pipe partial vacaum created com bustion chamber cycle repeated frequency pulses governed design shape combustion area tail pipe simple pulse-jet unfortunately ideal answer Scale modelers prayer jet engine Starting requires high-pressure blast air intake throttling qualities virtually zero noise levels sufficient put selfMounting brackets made aluminum alloy designed permit rapid removal engine inspection testing top engine fuel line returning preheating area carburetor Rear pipe temperature checked before putting cowl flight December 1983 89 engine revealed see course critical parts inside air inlet moulding fiberglass/epoxy engine cowling Bar-Jay fuselage Test sockets provided engine ground-monitoring compressor speeds tail pipe tempera ture Liquid propane fuel preheated beforeentering engine via twin fuel lines Cylindrical oil supply reservoir lubricate bearings situated just behind RC gear rear oil reservoir just visible airborne propane fuel tank holds enough about six minutes fliqht time ohotos author respecting heavy rock band shame Worse still sound doesnt resemble full-size jetexcept dreaded V-I flying bomb essential difference between ram jet pulse-jets ajet turbine engine latter uses compressor multi-stage axial compressors draw air com bustion chamber compress rotate compressor unit turbine wheel fitted common shaft gasses com bustion chamber pass through turbine blades turn complete compressor turbine assembly Part energy ab sorbed turbine remainder pro vides propulsive thrust jet engines based fundamental law physics states action equal reaction Combustion gasses expelled much higher velocity result compression heating combustion intake air velocity producing thrust big problems producing miniature jet turbine engine operating temperatures will region 6000C Another shaft speed compressor/turbine assembly may ap proaching 100000 rpm obtain workable thrust levels degree technological expertise required fields metal lurgy thermodynamics engineering considerable expanding team Gerry Jackman originator project decided build ajet turbine engine given little encouragement colleagues con sidered him loser Only determination obvious will succeed encouraged fel low modelers offer assistance Grad ually over past eight years strength team has increased inclusion specialist knowledge various facets technical design engi neering First offer services Barry Belcher aerodynamicist has responsible design Bar-Jay model used testbed latest en gine Barry also responsible major breakthrough designed revised turbine blade section improving static Continued page 174 90 Model Aviation Left The compressor blades can seen top right Underneath wing fillet tuel till overflow vents forward gear fitted abrasion brake acting tire Right View partial rear shows good fits expects well thought out design reservoir oil lubricate front rear shaft bearings engine can seen clearly picture well throttle servo Has four-channel Futaba controls trs . Ray Carter about connect propane fuel hose models fitting front model high-speed starter 24V motor geared turn up about 30000 rpm THIS FUEL FEATURES ORUST PREVENTION AGENTS ODETERGENTS OLUBRICAllON WITH HIGH FLASH POINTS sWElliNG AGENTS FOR MORE EFFICIENT AND DEPENDABLE RJEL FLOW OANTI-FOAMING AGENTS TO PREVENT LEAN RUNS KEEPS YOUR ENGINE RUNNING COOL sAN ODORLESS HIGHLY REFINED FUEL CHILDPROOF LIDS Available FAI 5 10 15 25 & AO% NiITo-Methane Contents Formulated synthetic lubriconts Also available castor DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT This competition fuel tast becoming THE CHOICE top profesionols first cash product Contact us price structures ordering information Manufacturers Major Brand Distributors Model Engines Kits Radios Accessories SUPER K Fuels brand KiNGS RADIO CONTROL HOBBIES INTERNATIONAL 3960 West 46 Ave Hialeah Florida 33042 305 557-2024 cross-grain tips rudders etc harder wood better grain should laid out run same direc tion span wing Make own plans Keep sketching top view until suitable draw side view along front tail views same scale Trace final top view onto selected board carbon paper below plan Redraw board ball-point pen dark pencil permanent imprint wood has inter esting grains along board might want select spot fall midfuselage location grain patterns finished wing will same both sides lucky can find boards swirls fall identically both wing halves Cut outline top view first want square sides top bottom board Once rough cut complete cut outside line allow errors sawcut bungles Dremel trim sand lines Next draw side views -in edge sim ply start carving until have removed excess wood down will file grind away remainder finished surfaces use No 50 production paper sand first smooth outline after filing done go No 120 followed final sanding No 220 wet-or-dry A-weight paper Dont strive too much detail unless expert finish can either natural wood makes fine model enjoy can make glossy spraying three coats Krylon Clear sanding No 220 wet-or-dry between coats have add rigging youll probably drilling holes Use nylon thread Mark location hole sharp pin wobble pin make starting place drill Drill handturning chuck power-drill could slip destroy few hours work almost impossible remove damaged areas sanding because wings already very thin case Whitehead 1901 No 21 carving Whitehead 1905 hang gliders nine-rib five-rib types rigging piece thread continuous pattern struts landing gear frame work pilot hang find popsicle sticks wooden forks French fries quite useful having strong grains structural needs Years age perhaps centuries Euro peans could afford fancy blown-glass ornaments Christmas trees make made orna ments curly shavings off car penters planewith much artistic imagination some glue SAFE FLYING IS NO ACCIDENT ornaments often accompanied other clevet attractive pieces such crib made nut shells infant figure bedded scraps cloth colors Animals skiing Santas host other wonderful wooden ornaments grew popularity exported over world Most made Germany Alps Copies now guessed made Hong Kong Airplane ornaments some thing can make enjoy Turbine/Boddington Continued oaae 90 thrust engine 20% Following turbine failure earlier enginesa traumatic cata strophic event served emphasize compiexitles dangers project Ray Carter brought work stress calculations engineering design Since time have no similar failures Ray has able advise special welding techniques pressed steel work prepare technical drawings recurring problem early engines failure rate shaft bearings speeds temperatures involved bearings would survive matter minutes full operating power Failures due partly high temperatures speeds serious contributing factor shafts whirlthe whipping oscil lation over unsupported length about 6 David Sitch bearings con sultant able advise cor rect selection bearings obtain combat shaft whirl correlation compressor design combustion chamber heat output nozzle ring turbine blade angle settings paramount importance efficient output small gas turbine engine points critical model-sized engines commercial-sized units efficiencies will result power outputs too low practical purposes Thermodynamic design considerations became responsibility Chris White has constantly striving refine design engine improve thermal efficiency produce useful thrust current development work aimed producing superior tail pipe design Whereas model aircraft can usually designed built will fly straight off building board no easy straightforward solutions constructing miniature gas turbine engine Gerry Jackman has phlegmatic tenacious personality freely admits eight years development have number occasions prospect eventual success appeared very remote Without support strong backup team proj ect may have faltered crisis suc ceeded another seemingly impassable complication have triumphed others have failed because have refused beaten have collective faith see job through end 174 Model Aviation specially formulated chemically balanced fuel top performance minimum engine wear weather condition PRODUCTS FOA~ Complete Line Exhaust Systems * Tuned Pipes led Tuned Pines * Headers * Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpassed WokmanshiD & Performance mtcfled Performance ystem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMERK&B SUPER POSY PAINT K&B MIXING CLIPS opinion no reason com mercial firm could have produced prac tical working jet turbine engine modelersprovided prepared invest thousands dollars de velopment experimental work Theirs has solo effort have received no assistance advice manufacturers designers full-size turbojet engines has amateurism highest pro fessional standards Design construction data view proprietary nature miniature gas turbine engine would unfair give detailed information design con struction unit After thousands hours research development work team naturally hopes recoup some re ward its efforts following brief comments will provide idea meth ods employed considerable technical barriers overcome Nimonic alloys stainless steel principal metals used construction engine Correct selection metals allow complimentary rates expansion closely-mating components vitally impor tant Equally important metals capable withstanding high stresses cer tain components tip speed com pressor 1100 ft per second high temperatures compressor ma chined high-quality duralumin dropforged material would have preferable couldnt easily obtained small quantity needed development prototypes Early attempts producing turbine wheel totally successful previ ously explained eventually nec essary construct special spark-eroding machine manufacture item tur bine takes 130 hours machining erod ing fumes dielectric fluid dur ing eroding process pretty obnoxious despite being perfumed Balancing compressor/turbine rotor has ultra pre cise rebalancing has carried out time bearing replaced Close-tolerance machining obviously needed project sophisticated gas MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler holiday season Standing 51/2 inches tall large 10 oz capacity its real attention getter definite colector piece years come ORDER NOW FOR THE HOLIDAYS ONLY $695 ER PLUS $200 POSTAGE & HANDLING PER ORDER RJL INDUSTRIES OX 5654 DENA CA 91107 795-9821 TAN COLORED OVEN GLAZED LIMITED PRODUCTION turbine engine work carried out Myford Super 7 lathe mod est commercial standards small mill ing machine typical power hand tools would expect find modelers well-stocked workshop present engine has tested over past 12 months concentrating initially obtaining reliable running im proving thrust levels Propane gas used bench running proved very suitable fuel engine fit ted model change made liquid propane storage vessel propane gas form too large bonus injecting liquid propane combustion chamber increased thermal efficiency engine disadvantage became difficult accurately meter fuel supply Rear bearings now survive accept able period proving team has able select correct bearings obtain reasonable operating temperatures rear end rotor shaft Temperature readings various points engine have monitored throughout test period Indeed total development has logical planned throughout eight years experimentation Temptations bolt unit temporary airframejust see whether would flyhave re sisted whole project has pro fessionally handled Good throttling respone feature engine although aircraft response power changes slow compared propeller-driven aircraft Shaft speeds 80-85000 rpm maximum result static thrusts 7 8 lb jet pipe tem peratures region 600-6500C comparison average internal combustion engine seems pretty pedestrian Greenbam Common debut Waiting rain cease least gave oppor tunity chatting Gerry Jackman before maiden flight attempted seemed remarkably relaxed com posed view circumstances wish get engine started aim model down runway watch make sky assured would make previous struggles 176 Model Aviation b p ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX A&A Industries AMA Membership Ace RC Inc Aero Tech RC . Air Tech Airtronics Phase Art ec Products Inc Americas Hobby Center b&r Hobbies Balsa USA Bavarian Precision Products Dave Brown Products Buckeye Balsa Buzzard Aircraft Byron Originals California Model Imports lina-Taffinder1 11 Johnnie Casburn Mfg27 Chevron153 Circus Hobbies86-87 Cleveland Model & Supply Co166 Condor Hobbies47 Consumers Guide RC Aircraft Prod. Consumers Hobby Corp150-151 Coverite 92 DA Enterprises26 D&D Engineering157 DG Products156 DGA Designs129136 DGM Industries177 Davey Systems Corp156 Larry Dodge Aero Inc140 Dougs Hobby Shop138-139 Du-Bro Products46 Dynathrust Props18 E&L Manufacturing84 Eastern Soaring Supply177 Addis Elmore159 Enys Model Engines nside Back Cover FAI Model Supply FHS Supply Inc Fab-Tek Inc Fabtronics Fiberglass Master Flite Line Products Flyline Models Fourmost Products Fox Mfg Co Full Command Systems14 Futaba Corp America93 163 98 53 154 132 140 82 91 4 92 140 141 152 Gator RC Products Giezendanner USA Carl Goldberg Models Gorham Model Products Great Lakes Model & Mold Great Planes Model Mfg Co Grish Brothers Art Gross Enterprises 14 9165 15 129 18 162 156 Hardware Systems William Hawke Heritage Models Inc Historic Aviation Hobby Barn Hobby Capitol Distributors Hobby Hideaway Hobby Horn 25 Hobby Lobby International Hobby Radio Shop Hobby Swap News 10 159 180 11 130-131 171 161 172 81 158 173 172 146-147 133 Ikon NWest Indy RC Sales International Modeler Show J-5 Enterprises Hi Johnson Model Products Jomar Products K&B Manufacturing Co K&S Engineering Kalee Inc Kin Craft Kings RC Hobbies Intl. K raft Systems Kustom Kraftsmanship Leisure Electronics n J Lind Co LoneStar Models 176 154 161 136 167174 49 171 164 Nor-Cal Aviaonics28 Ohio Superstar144 P&G Metal Products Pacer Technology & Resources Pacific Air Peck-Polymers Pica Products Polks Hobby Proctor Enterprises 157 179 173 161 136 155 4 RF Enterprises168 R LF Products177 RJL Industries176 Radio Equipment Exchange141 Radio South141 Redwood Hobby Imports172 Repla-Tech International141 Richardson Precision Machining172 Robbe Modellsport ide Front Cover 1 Roush Mfg Co 145 SR Batteries S&W Hobby Supply Saf-Flite Models 159Satellite City 160Scratch-A-Plane 157Seaglen Model Co Semco Sheldons Hobby Shop Sig Manufacturing Co St Croix Park Falls Ltd Sterling Models Swanson Associates T&D Fiberglass 173 Tatone Products 171 Taylor-Craft Ltd 137 Tide Distributors Inc Top Flite Models r Hobbies Twinn-K Inc.MACS Products MGA Enterprises Magus Model Aircraft 160 Majestic Models 170 Marks Models 148 George Marsden 158 Master Kit 176 McDaniel RCService 8 Jim Messers Quality Model Products 144 Midwest Model Supply Co 161 Midwest Products Co 169 Mills Airplane Models Model Rectifier Corp 176 145 148 173 51 26 137 160 171 41 23 132 29 134-135 Mutchlers Hobbies 92 82 177 160 24 167 170 83 142-143 13 158 28 157 144 83 156 19 149 175 82 VK Model Aircraft Bob Violett Models Vogel Aviation WE Technical Services iams Brothers Windsor Propeller Co World Engines 145 168 137 166 10 10 Back Cover Zenith Aviation Books5 Nick Ziroli Models132 153 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX worthwhile whole team would probably dissolve floods tears rain eventually ceased late afternoon Bar-Jay model quickly assembled numerous spectators moved safe position models fuel tank filled Looking down line critical spectatorsincluding some cynical prophets doomit impos sible admire courage Gerry inviting such gathering proposed maiden flight Anxious faces watched ignition plug energized starter applied nose cone Would fire life Starter speeds 25000 rpm required over come turbine losses speed reached could heard un mistakable jet turbine whine ignition took place Gradually pitch whine creased sound ex-jet-pilot pure music Surprisingly overall noise levels no means objectionable As engine built up full operating speed signs rough running almost though afterburner operating intermittently Just hatch about attached engine began die Further attempts starting engine resulted same erratic running Eventu ally efforts abandoned because GET ORGANIZED s set 4 sturdy tries thai holds over 4 yeas taoote 8 11 magazines 4 MAG FILES $495 Send 5495 p1058100 postage handling 0GM INDUOTNIES PO SOX 388-K DOVER NH 03880 December 1983 177 CUSTOM FOAM WINGS d IAIL CUS TOM SAILPLANE WINGSd TAILS SPRAY ADHESIVES FIBERGLASS FUSELAGES HI STARTS BALSA d PLYWOOD SEND 50 d 10 SASE FOR INFO ESS BOX 437 LEMONT PA /685/ P40 GAIl KIT FW.L COLOR EXACT REPRODUCTION heR pdea Sand Ta NOW00 REMEMBER HOW WELL THEY FLEW Spaniel nfl hatsda eases tar raeatakg sat StFm Madatap am Mmd Reansfi. Mt * *SAILPLANE* * launching equipment hi-starts/winches/accessories complete line/best pricesltop quality send self-addressed stamped envelope catalog/information RLF PRODUCTS R3 Box 178-Y PaoIi IN 47454812123-4310 impending darkness ____________________________________________________________[v32][b1588152171700]] say failure get model airborne disappointment spec tators stating obvious team __________________________________________________________must have devastating confidence venture would suc cess thwarted last No 426 China Clipper$2000minute RC Fantastic Sport Scale flying boat four 10-size engines 4-channel RO Three sheets no documentation Spans 74 in The sweet smell success tt did take No 427 Profiles$200long Gerry crew overcome FF Travelair Mystery Ship Miss Los Angeles profile all-balsa rubber mod- temporary setback soon els sport flying Wingspans 17 investigating reasons erratic runNo 428 Bearcat$525ning engine worked perfectly CL Big competition-caliber profile Precision Aerobatics plane 60 power on bench conclusion came No 131Gee Bee Modei Y 40-powered BC stand-off scale Ifre great old-tone racers$500 No 193Slillelto CL Stunt model McDonald winner 19761980 1982 FAI World champs$375was liquid propane fully No 225Ole Reliable BC 70 version 3ff old-toner REM controls 19-25$425 No 239Blue Beds RC Ken Willares formation plane 4-rh 10 vaporizing combustion chamber No 262Crasimusslee CL Crash-proof trainer 2 srzes 15-30 36-40$125secondary combustion taking place No262Gee Bee RC Granger Withams magnifrcent Model Z 40 engine$750 No291Csp2O dOpowered scale BC French aerohaff C plane Low wing tail-dragger2 sheetssothe jet pipe cure fuel feed line No269Gee Bee Sr Spoelsten RC t/4-scale Hafffte 91 finwer Prototype 5P 1175was taken around tail pipe preheat No 302Mini P18 FE Sarpolus 049 ducted fan sport f 2-rh Balsa wings tad tone strudore$275 No 3101930 Fleet Biplane RC Sport Orate icr 35-40 4-rh Wingspan 56 1/6 scale Two sheets$625fuel before injected com $375 No 314*e B BC Ken Wrflards flying boat 3-rh. 15-Power Ft7 wtttl rrtttoraltle ~bustion chambers Excessive pressure No326Tayice Cult PC Don Stolts schordyard-Scale 049s 2-2 CS Spans 50 te No 332Zepmye BC Soraif 2-rh glider br hand-launch tow thennid stope soadng$200 No 343Wasp Vi FF Mike Stoys Hats-winning Orddonr HEG$100built up fuel line first experi No348one RcTramerhasoeryforgfongffytnggsidtses3-dr 10-25power-$425ments further modifications showed No 354Menbyn FE Giant 155-in span Sadfdane uses 3 RC channels$750 No 358 Pieces FF Indoor Easy B RaSher-power contest-winner W Van Gorder$100greater promise No 362Supeecat BC Haff-APyfon Racer/sport ffmr aileron idevator control Foam sing -$200 meantime decided next sNo 365Seemastee BC Wtllards 40-size ttying boat 4-rh Strap-on gear fandplanet 2 shts-$1100 No 368space Shuttle B FE targer improved version Boo glider 3-rh$550outing would carry out extended No 370CAP21 BC GiantSrale French aerohatic craft spans 71/4 9 Quadra power 2 sheets dec$1400 278Me Spout U FE Fly Sport Pyfon NoviSportsman Paoern sheet sport Uses 4-dr 25-40 pwr$500taxi trials before attempting fly model oNo 379 m Spg Cf t Coorhat stdp large Ight super pertoniter-The throttle opening fixed give CJNo 383CaUsto 93 FE Fly sleek Nato mowing Salt plane AMA Mod tad thrfemfed classes-$750 o No366Laser 260 FE Sport Scale rephca 01 rhantyfooship Aerohafic flier uses 40 power 4-5dr 2sf9s$1075upper operating limit 60000 rpmwell No366US Mate BC I-loge gentle-lIving Styfane trainer sport Spans BOrn 00 errgsre 3-rh Tee shts-$1400 No 382Ciwisfiaphen FE Sport Scale porarhotist Two-dr set tories torso moves anon 425below maximum speed avail-No 383A Kioud King BC Reduced modernized verston 193ff design t2A Old-tatter 2cr 3dr-able No 294Ron Crow FF High-performance Quidoor Hand Launched Glider -$175 orNo386 yB CL t2A Racer lot MooseorScale Plans shewCoBtack Widow Spans 182/4 mV-tad$175 further trip Greenham Common Air aNo 396Lee-Rictueds FF Eledno-powered 020 Scale ring-sing oldie .$350 No398 flflcriarger Fouruhfa dnc$2225Base kind permission CO No396Zephyr 1100 FE AMA Ctoss B Sadplane 3-channel BC gear.made Again weather poor o No 401Royal Lancer FF Basic competitron wodid icr AMA Ctass uses stasdard-pertcrrttanre 15 engines $550 Z 0No 403Cub Ficalpiane BC Sport Scale tar OAg-tO-stce engines 4-dr BC J3 ffoats sa clanror$600time less critical - No 404Focke-Wuff 100 CL Proffie Scale tp.A power ieatarea anique engine mount icr erote reaienn$300 No405RegenflOnotOueSklesFEFuntopobiptarefor4060Power4-~f2ch -$1350only taxiing Gerry quite happy No 406Piper Coerancle CL Sport Scale uses 2Ss firroftle control 2 sheets$625 No407BoelngXFS8-l RCSpooScaiefori2Apower2-3drannelsgeneral ground handling qualities $600model decided give faster run a- taNo 406 ReVoff-Er BC elertuc power sport filer 2-chaneef 05 motor .. No409 Folikee Spin 16 PP Scale ot early monoplane trainer 049 power Three sheets plus dertallentatiotl- $825 410 pobee Plate BC Scale famous EAA plane 40-power 4-dr Bainid sport t$1200Acceleration considerably rapid $825 ~ Stunterbalndoor ~uh0rt lines $175than anyone predicted found No413 BonanasCLPtOStetonscaleStunterforlSto 25 engines PC scated-ap 1939 totter power tavonte $325 himself position having make No 414 Etecttic Sperimy BC ideduc powered ton tlmr 05 motor0000 reNo415 NawimerlkarrlceneNkl FEElectncpowerSportSraietort5mofcr3-4cham$1175instant decision Flying speed being 6 Stuntfire 60 CL Big 62-in-span Stonter 80-power - reached either engine shut 17 Spoetwagon JR BC Pulse-rudder uportsfer 02-power $300 No 418 Luton Minor BC Sport Scale model t930s Bn5sh Sgfintptane Icr 19-power 4-draminof PC $725 down flight made No 419 Dove 650 CL Coropetitien Stonter ior 40-46 power has foam wing slab $700 No426 Buck600FFCotllpe6tleOCtas5AorBfcrto-2t powerHassatialtle-arrtdettcetadVtT $600 Being man conviction faith No 421 Annes Plane CL WA traeter/sporfsfer rugged balsa faul-Suinlang Gerry e 9No422 Scooter tiC Two-Meter Saddarte has won Hats eveot 1992 t9fl3 plan Other contests$550ased back elevator stick No422 Cloud Cruiser FE Old-tatter takes 60-power 3-dr BC Two-piece wing OPSOn ler easy transport Two sheets $1275 immense surprise fortunate No 424 Good Tern PP Embryo Erinderance ruSher-power floatyfane has optional wheels strdr-attd-hssue delrgto $200 enough witness historic event No425 Skyrocket CL Pus-Scale sport tier tooks like Grummans on-none Navy twin moles hen 1P.M $325 wheels left ground After climbing 0 00 mmmmm mm mmmm m moothly away Bar-Jay flown U two complete circuits rcle numbers plans wish order brought gentle touchdown 193225239262282291299302 310It happened suddenly i31432332343348354358362365 368 some time enormity event 0I sink hardly believable Fortu 378379383386389392393394395Inately spectators armed video camera happenings 396398399401403404405406407408recorded posterityand team wE 10411412413414415416417418be able prove really did happen E 0 U Sunday March 20 1983 will remem 9 420421422423424425426427 428bered day model aero e includes first-class poStage Send ChBCk money order payable tonautical achievement attainedafter Model Aviation AMA 1810 Samuel MorSo Dr ReSton VA 22090I nearly 40 years quest Likely will se print carefullyEnclosed $ --_____ __I substantially change hobby few modelers may able use ajet turbine 4i NAME neif become available STREET_____- __ __-__commercidlly ___I significance achievement 5E CITY~ ____ ____ p modelers have NSTATE _____ ______________~ ZIP pioneering spirit accept challenge ______ ___________________ also determination carry through successful conclusion mmmmmmmmmmmmmmmmmmmmmmmmm 178 Model Aviation
Edition: Model Aviation - 1983/12
Page Numbers: 88, 89, 90, 174, 176, 177, 178
THE INFAMOUS Peace Ladies camped outsi4e Greenham Common Air Base England did seem too perturbed few score modelers cars lined-up enter main gate thing nearest re semblance Cruise missile motley assortment RC models packed rear some vehicles However cars model eyes least just revolutionary sophisti cated missile destined make historythough modeling history Sunday February 27 1983 day scheduled maiden flight RC model fitted genuine gas turbine jet engine true British tradition day cold wet windy following description efforts Gerry Jackman team produce practical model jet turbine engine gives some insight dedication small years mod elers have dreamed jet engine power true manner full-size airplanes wasnt until last March best knowledge someone actually flew RC model powered gas turbine en gine author pro vides first-hand account flight some background con cerning engines development U David Boddington 88 Model Aviation Top Designed Barry Beicher Bar-Jay successfully flown under power minia ture gas turbine let engine developed Gelry Jackmans team Flying weight around 16 lb Landing gear fixed prototype though future versions will include retracts Design includes twin booms high-mounted horizontal tail surfaces clear engines powerful jet blast Above victorious team Gerry Jackman center hard working assist ants L-R David Stitch Barry Baicher Jackman Chris White Ray Carter obscured group people prepared abandon project face setbacks frustrations disappointments Despite admonitions what attempting impossible realization various times throughout development period detractors might well right persisted plans stage dreams became reality past 35 years have arti cles written modeling magazines about model gas turbine enginessome purely theoretical others purporting based practical experiences few contributors have honest enough admit efforts crowned suc cess producing engine useful output experiments exciting Less forthright contributors tended give impression gas turbine engines built successfully run fitted flown models individual gall otfer plans instructions working jet turbine engineno working examples have seen date No photographic corroborative evidence presented prove RC model aircraft flown under power genuine gas turbine engine first pure jet aircraft flew 1939 Heinkel 178 Frank Whittle already carrying out test runs jet engine two years 1930 Whittle first took out patent form propulsion Perhaps surprising nearly 50 years after original design full-size gas turbine aircraft engine just reaching stage developing equivalent model size look few considerations involved pro ducing such engine will soon give insight goal has eluded engineers modelers long form jet engine has found favor modelers has pulsejet have us since 1950s Pulse-jets have big advantage have minimum working partsjust reed flap valves front combustion chamber Air introduced through valves mixed fuel mixture ignited spark plug After corn bustion completed gasses have expelled high velocity via tail pipe partial vacaum created com bustion chamber cycle repeated frequency pulses governed design shape combustion area tail pipe simple pulse-jet unfortunately ideal answer Scale modelers prayer jet engine Starting requires high-pressure blast air intake throttling qualities virtually zero noise levels sufficient put selfMounting brackets made aluminum alloy designed permit rapid removal engine inspection testing top engine fuel line returning preheating area carburetor Rear pipe temperature checked before putting cowl flight December 1983 89 engine revealed see course critical parts inside air inlet moulding fiberglass/epoxy engine cowling Bar-Jay fuselage Test sockets provided engine ground-monitoring compressor speeds tail pipe tempera ture Liquid propane fuel preheated beforeentering engine via twin fuel lines Cylindrical oil supply reservoir lubricate bearings situated just behind RC gear rear oil reservoir just visible airborne propane fuel tank holds enough about six minutes fliqht time ohotos author respecting heavy rock band shame Worse still sound doesnt resemble full-size jetexcept dreaded V-I flying bomb essential difference between ram jet pulse-jets ajet turbine engine latter uses compressor multi-stage axial compressors draw air com bustion chamber compress rotate compressor unit turbine wheel fitted common shaft gasses com bustion chamber pass through turbine blades turn complete compressor turbine assembly Part energy ab sorbed turbine remainder pro vides propulsive thrust jet engines based fundamental law physics states action equal reaction Combustion gasses expelled much higher velocity result compression heating combustion intake air velocity producing thrust big problems producing miniature jet turbine engine operating temperatures will region 6000C Another shaft speed compressor/turbine assembly may ap proaching 100000 rpm obtain workable thrust levels degree technological expertise required fields metal lurgy thermodynamics engineering considerable expanding team Gerry Jackman originator project decided build ajet turbine engine given little encouragement colleagues con sidered him loser Only determination obvious will succeed encouraged fel low modelers offer assistance Grad ually over past eight years strength team has increased inclusion specialist knowledge various facets technical design engi neering First offer services Barry Belcher aerodynamicist has responsible design Bar-Jay model used testbed latest en gine Barry also responsible major breakthrough designed revised turbine blade section improving static Continued page 174 90 Model Aviation Left The compressor blades can seen top right Underneath wing fillet tuel till overflow vents forward gear fitted abrasion brake acting tire Right View partial rear shows good fits expects well thought out design reservoir oil lubricate front rear shaft bearings engine can seen clearly picture well throttle servo Has four-channel Futaba controls trs . Ray Carter about connect propane fuel hose models fitting front model high-speed starter 24V motor geared turn up about 30000 rpm THIS FUEL FEATURES ORUST PREVENTION AGENTS ODETERGENTS OLUBRICAllON WITH HIGH FLASH POINTS sWElliNG AGENTS FOR MORE EFFICIENT AND DEPENDABLE RJEL FLOW OANTI-FOAMING AGENTS TO PREVENT LEAN RUNS KEEPS YOUR ENGINE RUNNING COOL sAN ODORLESS HIGHLY REFINED FUEL CHILDPROOF LIDS Available FAI 5 10 15 25 & AO% NiITo-Methane Contents Formulated synthetic lubriconts Also available castor DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT This competition fuel tast becoming THE CHOICE top profesionols first cash product Contact us price structures ordering information Manufacturers Major Brand Distributors Model Engines Kits Radios Accessories SUPER K Fuels brand KiNGS RADIO CONTROL HOBBIES INTERNATIONAL 3960 West 46 Ave Hialeah Florida 33042 305 557-2024 cross-grain tips rudders etc harder wood better grain should laid out run same direc tion span wing Make own plans Keep sketching top view until suitable draw side view along front tail views same scale Trace final top view onto selected board carbon paper below plan Redraw board ball-point pen dark pencil permanent imprint wood has inter esting grains along board might want select spot fall midfuselage location grain patterns finished wing will same both sides lucky can find boards swirls fall identically both wing halves Cut outline top view first want square sides top bottom board Once rough cut complete cut outside line allow errors sawcut bungles Dremel trim sand lines Next draw side views -in edge sim ply start carving until have removed excess wood down will file grind away remainder finished surfaces use No 50 production paper sand first smooth outline after filing done go No 120 followed final sanding No 220 wet-or-dry A-weight paper Dont strive too much detail unless expert finish can either natural wood makes fine model enjoy can make glossy spraying three coats Krylon Clear sanding No 220 wet-or-dry between coats have add rigging youll probably drilling holes Use nylon thread Mark location hole sharp pin wobble pin make starting place drill Drill handturning chuck power-drill could slip destroy few hours work almost impossible remove damaged areas sanding because wings already very thin case Whitehead 1901 No 21 carving Whitehead 1905 hang gliders nine-rib five-rib types rigging piece thread continuous pattern struts landing gear frame work pilot hang find popsicle sticks wooden forks French fries quite useful having strong grains structural needs Years age perhaps centuries Euro peans could afford fancy blown-glass ornaments Christmas trees make made orna ments curly shavings off car penters planewith much artistic imagination some glue SAFE FLYING IS NO ACCIDENT ornaments often accompanied other clevet attractive pieces such crib made nut shells infant figure bedded scraps cloth colors Animals skiing Santas host other wonderful wooden ornaments grew popularity exported over world Most made Germany Alps Copies now guessed made Hong Kong Airplane ornaments some thing can make enjoy Turbine/Boddington Continued oaae 90 thrust engine 20% Following turbine failure earlier enginesa traumatic cata strophic event served emphasize compiexitles dangers project Ray Carter brought work stress calculations engineering design Since time have no similar failures Ray has able advise special welding techniques pressed steel work prepare technical drawings recurring problem early engines failure rate shaft bearings speeds temperatures involved bearings would survive matter minutes full operating power Failures due partly high temperatures speeds serious contributing factor shafts whirlthe whipping oscil lation over unsupported length about 6 David Sitch bearings con sultant able advise cor rect selection bearings obtain combat shaft whirl correlation compressor design combustion chamber heat output nozzle ring turbine blade angle settings paramount importance efficient output small gas turbine engine points critical model-sized engines commercial-sized units efficiencies will result power outputs too low practical purposes Thermodynamic design considerations became responsibility Chris White has constantly striving refine design engine improve thermal efficiency produce useful thrust current development work aimed producing superior tail pipe design Whereas model aircraft can usually designed built will fly straight off building board no easy straightforward solutions constructing miniature gas turbine engine Gerry Jackman has phlegmatic tenacious personality freely admits eight years development have number occasions prospect eventual success appeared very remote Without support strong backup team proj ect may have faltered crisis suc ceeded another seemingly impassable complication have triumphed others have failed because have refused beaten have collective faith see job through end 174 Model Aviation specially formulated chemically balanced fuel top performance minimum engine wear weather condition PRODUCTS FOA~ Complete Line Exhaust Systems * Tuned Pipes led Tuned Pines * Headers * Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpassed WokmanshiD & Performance mtcfled Performance ystem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMERK&B SUPER POSY PAINT K&B MIXING CLIPS opinion no reason com mercial firm could have produced prac tical working jet turbine engine modelersprovided prepared invest thousands dollars de velopment experimental work Theirs has solo effort have received no assistance advice manufacturers designers full-size turbojet engines has amateurism highest pro fessional standards Design construction data view proprietary nature miniature gas turbine engine would unfair give detailed information design con struction unit After thousands hours research development work team naturally hopes recoup some re ward its efforts following brief comments will provide idea meth ods employed considerable technical barriers overcome Nimonic alloys stainless steel principal metals used construction engine Correct selection metals allow complimentary rates expansion closely-mating components vitally impor tant Equally important metals capable withstanding high stresses cer tain components tip speed com pressor 1100 ft per second high temperatures compressor ma chined high-quality duralumin dropforged material would have preferable couldnt easily obtained small quantity needed development prototypes Early attempts producing turbine wheel totally successful previ ously explained eventually nec essary construct special spark-eroding machine manufacture item tur bine takes 130 hours machining erod ing fumes dielectric fluid dur ing eroding process pretty obnoxious despite being perfumed Balancing compressor/turbine rotor has ultra pre cise rebalancing has carried out time bearing replaced Close-tolerance machining obviously needed project sophisticated gas MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler holiday season Standing 51/2 inches tall large 10 oz capacity its real attention getter definite colector piece years come ORDER NOW FOR THE HOLIDAYS ONLY $695 ER PLUS $200 POSTAGE & HANDLING PER ORDER RJL INDUSTRIES OX 5654 DENA CA 91107 795-9821 TAN COLORED OVEN GLAZED LIMITED PRODUCTION turbine engine work carried out Myford Super 7 lathe mod est commercial standards small mill ing machine typical power hand tools would expect find modelers well-stocked workshop present engine has tested over past 12 months concentrating initially obtaining reliable running im proving thrust levels Propane gas used bench running proved very suitable fuel engine fit ted model change made liquid propane storage vessel propane gas form too large bonus injecting liquid propane combustion chamber increased thermal efficiency engine disadvantage became difficult accurately meter fuel supply Rear bearings now survive accept able period proving team has able select correct bearings obtain reasonable operating temperatures rear end rotor shaft Temperature readings various points engine have monitored throughout test period Indeed total development has logical planned throughout eight years experimentation Temptations bolt unit temporary airframejust see whether would flyhave re sisted whole project has pro fessionally handled Good throttling respone feature engine although aircraft response power changes slow compared propeller-driven aircraft Shaft speeds 80-85000 rpm maximum result static thrusts 7 8 lb jet pipe tem peratures region 600-6500C comparison average internal combustion engine seems pretty pedestrian Greenbam Common debut Waiting rain cease least gave oppor tunity chatting Gerry Jackman before maiden flight attempted seemed remarkably relaxed com posed view circumstances wish get engine started aim model down runway watch make sky assured would make previous struggles 176 Model Aviation b p ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX A&A Industries AMA Membership Ace RC Inc Aero Tech RC . Air Tech Airtronics Phase Art ec Products Inc Americas Hobby Center b&r Hobbies Balsa USA Bavarian Precision Products Dave Brown Products Buckeye Balsa Buzzard Aircraft Byron Originals California Model Imports lina-Taffinder1 11 Johnnie Casburn Mfg27 Chevron153 Circus Hobbies86-87 Cleveland Model & Supply Co166 Condor Hobbies47 Consumers Guide RC Aircraft Prod. Consumers Hobby Corp150-151 Coverite 92 DA Enterprises26 D&D Engineering157 DG Products156 DGA Designs129136 DGM Industries177 Davey Systems Corp156 Larry Dodge Aero Inc140 Dougs Hobby Shop138-139 Du-Bro Products46 Dynathrust Props18 E&L Manufacturing84 Eastern Soaring Supply177 Addis Elmore159 Enys Model Engines nside Back Cover FAI Model Supply FHS Supply Inc Fab-Tek Inc Fabtronics Fiberglass Master Flite Line Products Flyline Models Fourmost Products Fox Mfg Co Full Command Systems14 Futaba Corp America93 163 98 53 154 132 140 82 91 4 92 140 141 152 Gator RC Products Giezendanner USA Carl Goldberg Models Gorham Model Products Great Lakes Model & Mold Great Planes Model Mfg Co Grish Brothers Art Gross Enterprises 14 9165 15 129 18 162 156 Hardware Systems William Hawke Heritage Models Inc Historic Aviation Hobby Barn Hobby Capitol Distributors Hobby Hideaway Hobby Horn 25 Hobby Lobby International Hobby Radio Shop Hobby Swap News 10 159 180 11 130-131 171 161 172 81 158 173 172 146-147 133 Ikon NWest Indy RC Sales International Modeler Show J-5 Enterprises Hi Johnson Model Products Jomar Products K&B Manufacturing Co K&S Engineering Kalee Inc Kin Craft Kings RC Hobbies Intl. K raft Systems Kustom Kraftsmanship Leisure Electronics n J Lind Co LoneStar Models 176 154 161 136 167174 49 171 164 Nor-Cal Aviaonics28 Ohio Superstar144 P&G Metal Products Pacer Technology & Resources Pacific Air Peck-Polymers Pica Products Polks Hobby Proctor Enterprises 157 179 173 161 136 155 4 RF Enterprises168 R LF Products177 RJL Industries176 Radio Equipment Exchange141 Radio South141 Redwood Hobby Imports172 Repla-Tech International141 Richardson Precision Machining172 Robbe Modellsport ide Front Cover 1 Roush Mfg Co 145 SR Batteries S&W Hobby Supply Saf-Flite Models 159Satellite City 160Scratch-A-Plane 157Seaglen Model Co Semco Sheldons Hobby Shop Sig Manufacturing Co St Croix Park Falls Ltd Sterling Models Swanson Associates T&D Fiberglass 173 Tatone Products 171 Taylor-Craft Ltd 137 Tide Distributors Inc Top Flite Models r Hobbies Twinn-K Inc.MACS Products MGA Enterprises Magus Model Aircraft 160 Majestic Models 170 Marks Models 148 George Marsden 158 Master Kit 176 McDaniel RCService 8 Jim Messers Quality Model Products 144 Midwest Model Supply Co 161 Midwest Products Co 169 Mills Airplane Models Model Rectifier Corp 176 145 148 173 51 26 137 160 171 41 23 132 29 134-135 Mutchlers Hobbies 92 82 177 160 24 167 170 83 142-143 13 158 28 157 144 83 156 19 149 175 82 VK Model Aircraft Bob Violett Models Vogel Aviation WE Technical Services iams Brothers Windsor Propeller Co World Engines 145 168 137 166 10 10 Back Cover Zenith Aviation Books5 Nick Ziroli Models132 153 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX worthwhile whole team would probably dissolve floods tears rain eventually ceased late afternoon Bar-Jay model quickly assembled numerous spectators moved safe position models fuel tank filled Looking down line critical spectatorsincluding some cynical prophets doomit impos sible admire courage Gerry inviting such gathering proposed maiden flight Anxious faces watched ignition plug energized starter applied nose cone Would fire life Starter speeds 25000 rpm required over come turbine losses speed reached could heard un mistakable jet turbine whine ignition took place Gradually pitch whine creased sound ex-jet-pilot pure music Surprisingly overall noise levels no means objectionable As engine built up full operating speed signs rough running almost though afterburner operating intermittently Just hatch about attached engine began die Further attempts starting engine resulted same erratic running Eventu ally efforts abandoned because GET ORGANIZED s set 4 sturdy tries thai holds over 4 yeas taoote 8 11 magazines 4 MAG FILES $495 Send 5495 p1058100 postage handling 0GM INDUOTNIES PO SOX 388-K DOVER NH 03880 December 1983 177 CUSTOM FOAM WINGS d IAIL CUS TOM SAILPLANE WINGSd TAILS SPRAY ADHESIVES FIBERGLASS FUSELAGES HI STARTS BALSA d PLYWOOD SEND 50 d 10 SASE FOR INFO ESS BOX 437 LEMONT PA /685/ P40 GAIl KIT FW.L COLOR EXACT REPRODUCTION heR pdea Sand Ta NOW00 REMEMBER HOW WELL THEY FLEW Spaniel nfl hatsda eases tar raeatakg sat StFm Madatap am Mmd Reansfi. Mt * *SAILPLANE* * launching equipment hi-starts/winches/accessories complete line/best pricesltop quality send self-addressed stamped envelope catalog/information RLF PRODUCTS R3 Box 178-Y PaoIi IN 47454812123-4310 impending darkness ____________________________________________________________[v32][b1588152171700]] say failure get model airborne disappointment spec tators stating obvious team __________________________________________________________must have devastating confidence venture would suc cess thwarted last No 426 China Clipper$2000minute RC Fantastic Sport Scale flying boat four 10-size engines 4-channel RO Three sheets no documentation Spans 74 in The sweet smell success tt did take No 427 Profiles$200long Gerry crew overcome FF Travelair Mystery Ship Miss Los Angeles profile all-balsa rubber mod- temporary setback soon els sport flying Wingspans 17 investigating reasons erratic runNo 428 Bearcat$525ning engine worked perfectly CL Big competition-caliber profile Precision Aerobatics plane 60 power on bench conclusion came No 131Gee Bee Modei Y 40-powered BC stand-off scale Ifre great old-tone racers$500 No 193Slillelto CL Stunt model McDonald winner 19761980 1982 FAI World champs$375was liquid propane fully No 225Ole Reliable BC 70 version 3ff old-toner REM controls 19-25$425 No 239Blue Beds RC Ken Willares formation plane 4-rh 10 vaporizing combustion chamber No 262Crasimusslee CL Crash-proof trainer 2 srzes 15-30 36-40$125secondary combustion taking place No262Gee Bee RC Granger Withams magnifrcent Model Z 40 engine$750 No291Csp2O dOpowered scale BC French aerohaff C plane Low wing tail-dragger2 sheetssothe jet pipe cure fuel feed line No269Gee Bee Sr Spoelsten RC t/4-scale Hafffte 91 finwer Prototype 5P 1175was taken around tail pipe preheat No 302Mini P18 FE Sarpolus 049 ducted fan sport f 2-rh Balsa wings tad tone strudore$275 No 3101930 Fleet Biplane RC Sport Orate icr 35-40 4-rh Wingspan 56 1/6 scale Two sheets$625fuel before injected com $375 No 314*e B BC Ken Wrflards flying boat 3-rh. 15-Power Ft7 wtttl rrtttoraltle ~bustion chambers Excessive pressure No326Tayice Cult PC Don Stolts schordyard-Scale 049s 2-2 CS Spans 50 te No 332Zepmye BC Soraif 2-rh glider br hand-launch tow thennid stope soadng$200 No 343Wasp Vi FF Mike Stoys Hats-winning Orddonr HEG$100built up fuel line first experi No348one RcTramerhasoeryforgfongffytnggsidtses3-dr 10-25power-$425ments further modifications showed No 354Menbyn FE Giant 155-in span Sadfdane uses 3 RC channels$750 No 358 Pieces FF Indoor Easy B RaSher-power contest-winner W Van Gorder$100greater promise No 362Supeecat BC Haff-APyfon Racer/sport ffmr aileron idevator control Foam sing -$200 meantime decided next sNo 365Seemastee BC Wtllards 40-size ttying boat 4-rh Strap-on gear fandplanet 2 shts-$1100 No 368space Shuttle B FE targer improved version Boo glider 3-rh$550outing would carry out extended No 370CAP21 BC GiantSrale French aerohatic craft spans 71/4 9 Quadra power 2 sheets dec$1400 278Me Spout U FE Fly Sport Pyfon NoviSportsman Paoern sheet sport Uses 4-dr 25-40 pwr$500taxi trials before attempting fly model oNo 379 m Spg Cf t Coorhat stdp large Ight super pertoniter-The throttle opening fixed give CJNo 383CaUsto 93 FE Fly sleek Nato mowing Salt plane AMA Mod tad thrfemfed classes-$750 o No366Laser 260 FE Sport Scale rephca 01 rhantyfooship Aerohafic flier uses 40 power 4-5dr 2sf9s$1075upper operating limit 60000 rpmwell No366US Mate BC I-loge gentle-lIving Styfane trainer sport Spans BOrn 00 errgsre 3-rh Tee shts-$1400 No 382Ciwisfiaphen FE Sport Scale porarhotist Two-dr set tories torso moves anon 425below maximum speed avail-No 383A Kioud King BC Reduced modernized verston 193ff design t2A Old-tatter 2cr 3dr-able No 294Ron Crow FF High-performance Quidoor Hand Launched Glider -$175 orNo386 yB CL t2A Racer lot MooseorScale Plans shewCoBtack Widow Spans 182/4 mV-tad$175 further trip Greenham Common Air aNo 396Lee-Rictueds FF Eledno-powered 020 Scale ring-sing oldie .$350 No398 flflcriarger Fouruhfa dnc$2225Base kind permission CO No396Zephyr 1100 FE AMA Ctoss B Sadplane 3-channel BC gear.made Again weather poor o No 401Royal Lancer FF Basic competitron wodid icr AMA Ctass uses stasdard-pertcrrttanre 15 engines $550 Z 0No 403Cub Ficalpiane BC Sport Scale tar OAg-tO-stce engines 4-dr BC J3 ffoats sa clanror$600time less critical - No 404Focke-Wuff 100 CL Proffie Scale tp.A power ieatarea anique engine mount icr erote reaienn$300 No405RegenflOnotOueSklesFEFuntopobiptarefor4060Power4-~f2ch -$1350only taxiing Gerry quite happy No 406Piper Coerancle CL Sport Scale uses 2Ss firroftle control 2 sheets$625 No407BoelngXFS8-l RCSpooScaiefori2Apower2-3drannelsgeneral ground handling qualities $600model decided give faster run a- taNo 406 ReVoff-Er BC elertuc power sport filer 2-chaneef 05 motor .. No409 Folikee Spin 16 PP Scale ot early monoplane trainer 049 power Three sheets plus dertallentatiotl- $825 410 pobee Plate BC Scale famous EAA plane 40-power 4-dr Bainid sport t$1200Acceleration considerably rapid $825 ~ Stunterbalndoor ~uh0rt lines $175than anyone predicted found No413 BonanasCLPtOStetonscaleStunterforlSto 25 engines PC scated-ap 1939 totter power tavonte $325 himself position having make No 414 Etecttic Sperimy BC ideduc powered ton tlmr 05 motor0000 reNo415 NawimerlkarrlceneNkl FEElectncpowerSportSraietort5mofcr3-4cham$1175instant decision Flying speed being 6 Stuntfire 60 CL Big 62-in-span Stonter 80-power - reached either engine shut 17 Spoetwagon JR BC Pulse-rudder uportsfer 02-power $300 No 418 Luton Minor BC Sport Scale model t930s Bn5sh Sgfintptane Icr 19-power 4-draminof PC $725 down flight made No 419 Dove 650 CL Coropetitien Stonter ior 40-46 power has foam wing slab $700 No426 Buck600FFCotllpe6tleOCtas5AorBfcrto-2t powerHassatialtle-arrtdettcetadVtT $600 Being man conviction faith No 421 Annes Plane CL WA traeter/sporfsfer rugged balsa faul-Suinlang Gerry e 9No422 Scooter tiC Two-Meter Saddarte has won Hats eveot 1992 t9fl3 plan Other contests$550ased back elevator stick No422 Cloud Cruiser FE Old-tatter takes 60-power 3-dr BC Two-piece wing OPSOn ler easy transport Two sheets $1275 immense surprise fortunate No 424 Good Tern PP Embryo Erinderance ruSher-power floatyfane has optional wheels strdr-attd-hssue delrgto $200 enough witness historic event No425 Skyrocket CL Pus-Scale sport tier tooks like Grummans on-none Navy twin moles hen 1P.M $325 wheels left ground After climbing 0 00 mmmmm mm mmmm m moothly away Bar-Jay flown U two complete circuits rcle numbers plans wish order brought gentle touchdown 193225239262282291299302 310It happened suddenly i31432332343348354358362365 368 some time enormity event 0I sink hardly believable Fortu 378379383386389392393394395Inately spectators armed video camera happenings 396398399401403404405406407408recorded posterityand team wE 10411412413414415416417418be able prove really did happen E 0 U Sunday March 20 1983 will remem 9 420421422423424425426427 428bered day model aero e includes first-class poStage Send ChBCk money order payable tonautical achievement attainedafter Model Aviation AMA 1810 Samuel MorSo Dr ReSton VA 22090I nearly 40 years quest Likely will se print carefullyEnclosed $ --_____ __I substantially change hobby few modelers may able use ajet turbine 4i NAME neif become available STREET_____- __ __-__commercidlly ___I significance achievement 5E CITY~ ____ ____ p modelers have NSTATE _____ ______________~ ZIP pioneering spirit accept challenge ______ ___________________ also determination carry through successful conclusion mmmmmmmmmmmmmmmmmmmmmmmmm 178 Model Aviation