INTERNATIONAL RC Scale Soaring Fun-Fly coming up recently received update Wil Byers years fun-fly Heres what say weekend Memorial Day 1988 weekend first-ever National RC Scale Soar ing Fun-Fly Soaring Social event marked outstanding enthusiasm tremen dous support Soaring community As result event will probably go down Soar ing annuals genuine success therefore Tn-City Soarers feel worthy repeating 1989 Now attended enjoyed yourself want invite come back share event us again however able attend last year think event kind Soaring happening want part heartily welcome come TnCities participate International RC Scale Soaring Fun-Fly May 26 27 28 1989 goal years event attract entrants over world well US Canada successful endeavor will have opportunity share other fine craftsmanship flying skills participation vital end Whether its because youre meticulous crafts man talented flier just all-around nice guy would absolutely miss able attend want Think about much fun would have regis ter great Soaring experience will again using Clover Island Mo tor Inn fun-fly headquarters hotel has greatly improved through complete remod eling management hospitable last year restaurant has added new menu view rooms still just great ever Columbia River flowing just feet away room beautiful desert mountains distance Tn-Cities Soarers genuinely hope registering right now will soon get chance meet see models action Make note re ceive registration will enter event about month prior event will send information packet packet will include maps telephone numbers site location directions Additionally sug gest register early make room res ervation making reservations hotel please indicate Soaring group course get Glider done order Lastly Tri-Cities has picked site 1989 AMA National Championships year will include AMA sanctioned one-day Slope race feel testa ment slopes second provided wind cooperates plans will rewarded fun-fly enjoyable times Soaring life Viking F3F Slope Race event will held Denmark June 1 1989 opportunity see some best Slope fliers world received letter Dale Willoughby will competitors US Dale will team manager/competitor anyone dwel ling east Mississippi River bound Denmark plan attending event get touch Dale soon possible ad dress PO Box 927 Jacksonville NC 285410927 Lift following two-part article ap peared two recent issues Slope Soaring News Written Chuck Korolden discusses what lift find LiftWhat What stupid question Lift Its what live its Just because wind blowing up slope good clip doesnt mean lift good fact wind velocity ladder impor tance several rungs below other factors present readily obvious True Maniah other factors come moot function gether whole called life an lift bout Freudian slip keyboard Lift combination wind velocity Left Members White Sheet Radio Fiying Ciub recent ciub Scaie competition WSRFC premier Siope ciubs UK Obviously specallze Scaie modeiing Right David Brigga waIts judging circie gorgeous quarter-scaie Twin Acoro Southwest main bowi Slope background site has plenty room iand glider Photos Sean Waibank 48 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisier Ct Saratoga CA 95070 Doug Hertzog copilot Troy gets ready aunch Dougs Siihouette Silhouette new kit being produced Doug come future articie Photo Charile Morey air density As long air going up faster plane goes down stay up Soar ing performance has quality air speed its rising two forces optimum planes fly well things arent up snuff best design becomes dog didnt know factors existed until started build own planes day flew thought should next day someone taken flubber out took place under aimost same wind condi tions As learned later wind same air very different day test flying new wing shaped Jack Chambers JC-14 airfoil Something wasnt right tried adding weight taking out made adjustment after adjustContinued page 157 VACUUM BAG UM BAG UM BAG UM BAG SUCKER-KIT manually controlled vacuum bag system makes lay up process combination foam & skins trouble free fast first time SUCKER-KIT$5995 VHS Show & Tell Video$3995 Add $400 shipping & handling MI residents add 40/a sales tax Send $100 SASE product list samples real wood veneer skins Product List Includes Gapless Arrow Shaft Hinges Carbon Tow Mylar Sheet High-Tech items Dealer Inquires Welcome SEND CHECK OR MONEY ORDER TO Box 866 Lapeer Ml 48446 313 664-3330 Polyhedral Wing-$41 PP Aileron Wmg-$46 PP versatile 1/2 meter wingspan Foam Wing Glider Piloted Paul Wilson crewed Rusty Shaw & Leroy Satterlee Chupersoas designers set Glass record 66 miles Eppler 214 Tersy Edmonds famous pair thermal duration 10 has superior per formance 2 meter events CALLISTO takes over dominate standard class May 1989 49 perfect running mate Vortechs P-51 Zero Check text Infor mation Vortechs P-51 new Zero Composite Aircraft Eng & Supplypo Jeff Fukushima Vortech Models P-51 Mustang Designed fly wherever fly aileron planes Jeffs P-Si another fine ex ample power scale Plc Charlie Moray 8971 AVAILABLE AT AMERICAS FINEST HOBBY SHOPS 69786528 DISTRIBUTED BY sMInhII RED WDYZRZD 7660 So, Gobriel Rood cadero CA 95422 806 466-1717 FROM IIAVEY YSTEMS ir really slick trainers little hassles building taken out box before open birds simple build pretty look small parts well sides tail feathers pre cut ready quick assembly Youll air flying own faster ever expected AT-50 four channel advanced trainer 19-30 engines scale look flies rock stable like pattern bird has wide speed range Has 50 span semi-symme trical airfoil 400 sq area Both kits feature rolled plans step-by step instructions hardware wheel pants formed gear accurately die machine cut selected woods BT-20 three channel trainer 15-25 engines Has fully sheeted flat bottom wing can built optional ailerons 50 span 400 sq area IAVEY675 TOWER LANE YSTEMS WEST CHESTER PA 19380 oRPORATIoN tial interference distant sources number measures can take reduce eliminate skywave interfer ence problems some suggestions 1 Use good quality narrow-band re ceiver conforming 1991 specifications especially important source interference transmitter operating frequency absolutely identical fre quency RC equipment 2 Use PCM radio its inherent abil ity reject interference 3 Avoid flying very high far away transmitter 4 Make sure radio equipment properly tuuled adjusted tactics will provide measure protection hits outside sources may already have noticed interfer ence radio glitches six-meter RC equipment functioned reliably past Cycle #22 could quite pos sibly cause *Contact American Radio Relay League 225 Main Street Newington CT 06111 information about ama teur radio bulletins broadcast what information contain ARRL also excellent source information about am ateur radio electronics theory short wave listening League can help get amateur operators license show build electronic equipment tennas provide easily digested information concerning electrical elec tronics theory Theres brief section current ARRL Handbook about Radio Control equipment principles RC Giant Scale/de Vries Continued page 47 new catalogs Both have added substantially copious lists photo packs well stores Scale drawings Bobs list Scale Model Research 2334 Ticonderoga Costa Mesa CA 92626 $3 Docs Scale Plans & Photo Ser vice 3209 Madison Ave Greensboro NC 27403 also $3 North American modelers Bob notes overseas air mail $250 Doc air mails catalog overseas addi tional $2 postage Emil Neelys latest Ikon NWest PO Box 306 Post Falls ID 83854 Giant Scale ver sion Curtiss Robin Emils done both OX-S Curtiss Challenger-powered ver sions venerable Robin both apparently fly delightfully good stable model yours truly remembers good old days Co met 6-ft-span Free Flight version same prototype Mine flew well Dennymite en gine up front What improvements en gines Emils design should good starting point Giant Scale novice Span 98 flying weight about 14 lb 108 powers Ikon test model An Ikon NWest catalog kits available same address three buckswhich seems popular number month Emil Agostas current project huge Bucker Jungmeister Span 863 Length 745 cowl almost foot diameter theres big bipe future contact Mr Agosta care Dry Ridge Models 59 McCurry Road Weav erville NC 28787 indicates building drawings will run $60 per set should ready column appears final word month about 89 IMAA Rally Giants Les Hard editor High Flight notes years go will take place June 14-18 Odessa TX contact person Robbie Carson 6576 Amber Drive Odessa TX 79762 phone 915 368-5874 Pre-registration landing fee $15 June 1 on-site reg istration will $20 Like other IMAA rallies big un will relaxed fly/gab fest us Gi ant Scalers RC Slope Soaring/Triebes Continued page 49 ment flew again again Nothing seemed help about give up donate wing release tension up walked Jim Slatt Jim Slope masters hes made lot hand-shaped wooden wings told him what happening plane said maybe done poor job wing looked very carefully few minutes stated looked him like very good wing proper washout tips clean Phil lips entry leading edge saw nothing wrong suggested put away bring Out some other day wind blow ing hard fairly straight told him Theres plenty lift out Jim said strength wind can misleading should never judge flight characteristics new plane just days flight went tell once designed wing sure performer selected lowest density balsa out Continued page 161 May1989 157 4 w NEW FEATURES ADDED! Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability * User Selectable Cross Trim Capability * Flap Stick Reversing * Elevator Camber VTR * Automatic Selection High Ail Rudder Mixing Launch Landing Modes * New Feature Fully installed kit Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 AirtmnAsTh Module 75P registered trademarks Ainronics Inc RC Slope Soaring/Triebes Continued page 157 stash contest-grade wood went work done could hardly wait fly sure would best-flying plane hed made date flight day disheartening took wing home hung back garage Six months later dug out gave another try everything thought should moral story said never judge something build flying least five different days bit advice stuck read book loaned friend flies hang gliders some questions began answered book called Flying Conditions Micro-meteorology Pilots Dennis Pagan Its written mainly about hang gliders sailplanes conditions same RC Slope pilots Knowing about aerodynamics important building good Slope plane Knowing about dynamics air equally important Im working private pilot rating things Im learning have lot condition air Understanding different factors volved flying now important cause welfare pilot just air craft major consideration ATRCSTM Advaneed Technology Radio control Sysleni Works standard FM/PPM Receivers AirtronicsTh PCM Receivers Converts Module 75P advanced computerized control system LiftWhat Look part two Ill go little depth about what makes good lift what can cause change study atmospheric phenomena very complicated involves lot strange formulas wont go much detail want best place start Dennis Pagans book mentioned earlier Ill keep simple four main factors involved creat ing lift 1 Air density 2 Entry path slope 3 Wind direction relation slope 4 Size shape slope Air density misunderstood ignored aspect lift dynamics two main influences dictate what density air will betemperature humidity two factors can turn small breeze booming lift take punch Out good strong wind air hot humid its less dense especially its foggy Some people out probably saying wa ter air has thicker wont go long dissertation Ill add water molecules force air mole cules spread apart isnt very complete explanation dont want torn seven-part series Now important everyone Elevator /70y// Camber% I/il/I I/72W/ 0 070 100 Elevator Stick Position % flies place great conditions day find yourself sweating through acrobatic ma neuvers easy few days earlier wind blowing hard right direc tion might because change den sity air So recap Dry cool good Hot wet bad Entry path slope refers what wind has go over its way slopebe water ground objects size wind comes right over water will develop no tur bulence therefore generate smooth lift blows over ground no matter smooth unobstructed will have turbulence associ ated lift makes closer obstruc tions slope worse gets trees houses other objects way turbulence create can felt thousands yards past object spawned An example apparent Long Beachs Bluff Park around 11 am noon wind usually coming straight lift good about 1 pm will switch west just few degrees puts line some offshore oil rigs least 600 yards away lift gets very patchy until switches little west clear oil rigs smoothes out flying good again brings us next factor Wind direction relation slope Tidewater Hobby Enterprises l4U SE41t SU*E*flELDFL32691 904 245-4653 FOR AMERICAN QUALITY FOR SUPERIOR PERFORMANCE FOR PROSUCTI YOU CAN NE PROUD OF QUALITY STANSANSI AT TIDEWATER ARE NECESSARILY HIGH BECAUSE THE ElI ME MANUFACTURE IS TUE PRIER YOU TARE TO THE FUELS COMPLETE LINE AVIALARLE AT QUALITY NORHY SHOPS * 64 SIMISYMITRICAL WING WING AREA * 4 CHANNEL CYCLI 90 4CYCLE LITU WEIGHT ILE I8195 * COMPLETE RUT FOLISHEE ALUM LANSING GEAR * ALL HEWE * 5 TAIL WHEEL * H OZ HAYES FUEL TARE * 3 MAIN WHEELS * UDJOY PERFORMING LOOPS S * SPINS SPINS * * SNAP ROLLS L TURNS RTLESS TOSCN ARE COS * May1989 161 850 Clevis Remover Clevis Remover designed especially sit uations clevis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm clevis tilt right towards thread ed part clevis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Carter St Vidalia LA 71373 316336-5606 dukes ture motor quits wrong time still fuel tank blood pressure goes u sometimes airplanes get bent Unfortunately no simple answer like replace transistor XAC will happy However some systematic exploration problems can usually sorted Out corrected First important understand made plane motor quits unexpectedly 99 times Out 100 either isnt gettingfuel else glow plug has cooled point wont fire Ilameout Aflameaut usually occurs motor has idled back quits upon giving throttle An interruptedfuelJlow usually cause motor quits aefi ill powei nearlyfidlpower Nowfirst lets consider possible causes offuel interruption motor seems run well ground thefint two three minutes theflight quits put airplane climb can almost always assume tank tube has cut hole flopper tube slips over sharp tank tube end thefuel level burned down little bit airplane nosed up hole uncovered motor sucks air dies fuel starvation second possible problem sometimes jlopper tube willfallforward get stuck third cause offuelfiow interruption caused too long tank flopper tube afast pass situation fuel wants fall forward approach enough downward pitch bring flopperforward solution seems work well shorten theflopper tube theflopper tube weight abaut 2/3 way back tank way tank has almost empty before effect becomes evident seem explain problem reasonable assume have dirt some obstruction somewhere fuel line Flameout problems harder put yourfinger First thing tsy new glow plug Veiy often aglow plug will come coated impurities some type will become ineffective new glow plug doesnt correct flameout problem go over low speed mixture adjustment procedure Fox motors have best result enough fuel carburetor crankcase motor run 6 8 seconds after shut off check running motor idle glow plug heater pinch thefuel line just back nipple motor runs 8 seconds want lean low speed needle stops immediately want back out little until run-on time achieved should done high speed needle set rich side After low speed set set high speed accordance airplanes needs restriction exhaust pressure supply will tend flood motor athrottle back situation porticularly large spongy plastic tank solution clear line enlarge pressure fitting hole unusualfor light high powered model have carburetor properly set give throttle take-off motor staggers caused cavitation thefuel line good 40 size motor will produce 6 7 pounds thrust takeoff ifyou have 4 pound airplane no way fuel going continue tofeed carburetoc can sometimes trick situation routing fuel line around thefrone carburetor looping carburetor isa httle fuel line post cavitation point often made mistakes idling motor too rich motor will continue idle very well surprising amount offuel accumulated crankcase However advance throttle motor speeds upi sprayed upper cylinder pretty hard keep aglow plug lit afuel stream spraying iv solution course adjust low speed needle leaner Some lesser likely causes motor quitting have run across asfollows Once Ifound piece offuel tubing sliver inside become peeled off acted like afoot valve would pass fuel slowly thefuel demand became great piece tended flop over close passage Another time customer brought motor just positively would idle run partial throttle Upon disassembling motor wefound owner hopped motor up smoothing out ports radiusing upper lip piston particular case small rodius completely changed scavagingflow byposs spraying glow plug Now another cause motor quitting idle low throttle moisture thefuel takes 8 10 drops water gallon offuel completely destroy idling ability day might have 95% humidity leave lid offfor 1/2 hour what going happen thefuel will evaporate evaporates cools becomes cooler surrounding air reaches dew point Water condenses wall container bath inside outside water outside course doesnt anything water inside becomes mixed thefuel prestoyou have haifa jug offuel wont idle worth aXXXX solution toss get another can Probably best insurance can buy against aflameout use Fox Mirocle Plug Ifyou havent tried should Happy Flying 6L~k Manufacturing Company 5305 Toweon Avenue Fort Smith AR 72901 Phone 501 64-1656 ones easy straightet wind blows sttonget lift wind angle becomes less perpendicular slope less lift Size shape slope Smooth solid air straight no obstructions means zilch has nothing blow against Ya gotta have hill dimensions hill cliff slope bump what puts together self-evident higher up better vertical better dont limit yourself just natural heaps dirt rocks some places might never think place fly Sometimes use Olympic pool building Belmont Shore because its got big flat wail facing wind friend stationed Oklahoma few months used hay barns get lift Watch seagulls other soaring birds see what use free ride try same Well thats hope gives some thing work opens up flying pos sibilities important part observant Watch what happens places fly time youll get know good surfer knows kind wave because fun depends wave similaronly invisible dont know look Slope Soaring News great publication Slope fliers does contain interesting articles like Chucks also has great kit re views fantastic photos informative looks such things building fiberglass fuselages vac uum bagging advanced radio techniques would like have another great source Soaring information one-year subscrip tions available $1595 check payable Charles Morey address Slope Soaring News 2601 E 19th St #29 Signal Hill CA 90804 Vortech Models P-Si Zero Jeff Fukn shima better-known fliers south ern California now producing Slope Scale kits P-Si Zero following what Slope Soaring News say about Jeffs P 51 kit Jeff produces complete P-Si Mustang kit fi berglass fuselage foam cores plans wood fuselage piece other words does assembly two halves feature makes kit easy build fiberglass-fuselage foam-core Slope plane airfoil semisymnhetrical configuration wing sheeted / plywood No doesnt come already sheeted have Jeffs P-Si flies Long Beach model should fly just about anywhere Zero brand-new looks great Jeff has reached agreement Bob Ratzlaff Wilshire Model Center sell kits Contact Wilshire Models 2836 Santa Monlca Blvd Santa Monica CA 90404 ph 213 828-9362 information Rohacell Composite materials becoming commonplace todays Sailplanes exciting useful products come along some time Rohacell Matt Gewain Composite Structures Technology sent some small samples test have say stuff amazing what Matt has say about As aeronautical engineer serious FM competitor last 12 years have tried nu merous construction methods closely watched development composite models Europe Recentiy have settled wing con struction method utilizing Kevlar carbon fiber extensively reinforcement balsa foam core materials However polysty rene polyurethane foams tried lacked com patibility model products resulting excessive weight finlshed addition foam compressed easily weakening model creating problems vacuum molding technlques used applying Kevlar carbon fiber Seeking solution led foam product best Euro pean modelers have using years great resultsRohacell Rohacell compatible current model ing adhesives finishes Plus works very easily much like balsawood times stronger polyurethane polystyrene foams modelers familiar 19 lb per Cu ft density F3B World Champion Raif Decker several noteworthy European fliers utiliz ing Rohacell build top competition machines Reiner Hofsas winner FiB 1985 Free Flight World Championships utilized Rohacell carbon fiber later Espada Wakefield FlB models Thomas Koster has used Rohacell foam several years development all-composite FiC models search perfect core material discovered other modelers also terested trying Rohacell experience along success others has convinced material has tremendous potential types modeling serious competitor ad vantages ease construction weight savings strength far outweigh somewhat higher price compared conventional materials Therefore am making Rohacell available modelers via Composite Structures Technology Dept JR2 3701 Inglewood Ave #268 Ingle wood CA 90287 162 Model Aviation tic /C ad fly Leisure Playboy LanZO Bomber valuable electric RIC lessOfl5• ight Fundamental good electric flight weight airframe Leisures Playboy ters both feature jghtWeight airframes takeoff climb capabilities long flights slow ~ndings n build4n stabilitY easy flying original Playboy Bomber designs started two old timers fly hands off too make perfect RIC trainer imnortant lesson Leisure PlayboY teach tO open up see because theyre electric silent can fly almost hobbY dealer pick up Leisure r kit inexpensive LeiSure 05 some good lessons Also available CST Keviar fiberglass cloth 56 oz 6 oz Safe-T-Poxy mold re lease spray vacuum bag sealant ready step up composite technology products may just what looking Pteranodon Press times have tried enlarge shrink airfoil meet needs resort TLAR Looks About Right conclusion like answer question lotsa times number books available show various plots namely Eppler series usually have ex act size want Now thing past Available Pteranodon Press plots size 300 different air foils Rich Neveln mastermind behind Pter anodon Press supplier great ser vice $2 large SASE Rich will send list available airfoils samples order ing info address Pteranodon Press PO Box 3650 Galdand CA 94609-0650 RC Electrics/Kopski Continued page 51 hundreds flights same motor same 12-cell flight battery pack past summer saw rekindled interest part night flying manifestation wing pods have added orig inal Eureka removable balsa pods rub berbanded place fact have used Astro Challenger well call pods Il luminons Illuminons 25-oz balsa struc tures about 17 long contain two 250 mAh cells switch charge jack two lens assem blies toy flashlights pointing ward aft Connections soldered dinary replaceable flashlight bulbs front Illuminon covered transparent yellow MonoKote rear red transparent addi tion several 18-in-long -in-wide strips chrome MonoKote taped rear II luminon what get Nighttime brilli ance dazzling fun multicolored Illumi nons permit full realization model attitude flightpath total darkness spotlight flashlight lens assemblies up front permit dead head-on landing approaches hori zon trailing chrome streamers provide brilli ant fiery afterburner appearance model flies away flight line short its sheer dazzlement may interested strongly recommend type flying docile models skilled pilots thoroughly fa miliar daylight flight characteristics said docile planes Otherwisego Its whole new fun-filled modeling variantbest done quiet clean Electric power course Eleetrostreak kit Great Planes mentioned last months column Im pass ing along suggestion may inter est anyone building As designed Elec trostreak has fully boxed-in nose section motor mount wing leading edge sides top bottom sheeting glued place same time plans show installing speed control receiver battery area just behind motor Well bit challenge tooshort too-fat fingers got very quickiy frustrat ed whole idea proceeded modiIi structure shown photos Sim ply putI installed good ol fashioned hatch As shown hatch fits down recess formed adding some 42 x Y6-in strip top outer edges fuselage sidesright top installed triangle stock area tri angle stock trimmed back inside edges inside step now formed about /6 wide Some top sheeting glued place shown leading edge location top fuselage front over motor formers latter sheeting extends rearward past rear motor former about /16 simple hatch cover made /32 balsa 4-in-wide /64 ply strip glued down side middle shown cover fits re cess formed described above flush glued-in-place top sheeting small tongue ply extends forward cover toes-in underneath front top sheet small plastic catch shown landing gear strap will installed #2 sheet metal screw center balsa top plate leading edge position will swing over rear edge hatch cover hold down swing away desired lift hatch off Either receiver pack speed control whatever can still attached underside hatch double-sticky Velcro originally intended Im sure modification will make fi nal installation subsequent maintenance much pleasant us such fin gers Iand everyone else too Putting alternative general wayI cant imagine Electric having access hatch Continued page 166 May1989 163
Edition: Model Aviation - 1989/05
Page Numbers: 48, 49, 157, 161, 162, 163
INTERNATIONAL RC Scale Soaring Fun-Fly coming up recently received update Wil Byers years fun-fly Heres what say weekend Memorial Day 1988 weekend first-ever National RC Scale Soar ing Fun-Fly Soaring Social event marked outstanding enthusiasm tremen dous support Soaring community As result event will probably go down Soar ing annuals genuine success therefore Tn-City Soarers feel worthy repeating 1989 Now attended enjoyed yourself want invite come back share event us again however able attend last year think event kind Soaring happening want part heartily welcome come TnCities participate International RC Scale Soaring Fun-Fly May 26 27 28 1989 goal years event attract entrants over world well US Canada successful endeavor will have opportunity share other fine craftsmanship flying skills participation vital end Whether its because youre meticulous crafts man talented flier just all-around nice guy would absolutely miss able attend want Think about much fun would have regis ter great Soaring experience will again using Clover Island Mo tor Inn fun-fly headquarters hotel has greatly improved through complete remod eling management hospitable last year restaurant has added new menu view rooms still just great ever Columbia River flowing just feet away room beautiful desert mountains distance Tn-Cities Soarers genuinely hope registering right now will soon get chance meet see models action Make note re ceive registration will enter event about month prior event will send information packet packet will include maps telephone numbers site location directions Additionally sug gest register early make room res ervation making reservations hotel please indicate Soaring group course get Glider done order Lastly Tri-Cities has picked site 1989 AMA National Championships year will include AMA sanctioned one-day Slope race feel testa ment slopes second provided wind cooperates plans will rewarded fun-fly enjoyable times Soaring life Viking F3F Slope Race event will held Denmark June 1 1989 opportunity see some best Slope fliers world received letter Dale Willoughby will competitors US Dale will team manager/competitor anyone dwel ling east Mississippi River bound Denmark plan attending event get touch Dale soon possible ad dress PO Box 927 Jacksonville NC 285410927 Lift following two-part article ap peared two recent issues Slope Soaring News Written Chuck Korolden discusses what lift find LiftWhat What stupid question Lift Its what live its Just because wind blowing up slope good clip doesnt mean lift good fact wind velocity ladder impor tance several rungs below other factors present readily obvious True Maniah other factors come moot function gether whole called life an lift bout Freudian slip keyboard Lift combination wind velocity Left Members White Sheet Radio Fiying Ciub recent ciub Scaie competition WSRFC premier Siope ciubs UK Obviously specallze Scaie modeiing Right David Brigga waIts judging circie gorgeous quarter-scaie Twin Acoro Southwest main bowi Slope background site has plenty room iand glider Photos Sean Waibank 48 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisier Ct Saratoga CA 95070 Doug Hertzog copilot Troy gets ready aunch Dougs Siihouette Silhouette new kit being produced Doug come future articie Photo Charile Morey air density As long air going up faster plane goes down stay up Soar ing performance has quality air speed its rising two forces optimum planes fly well things arent up snuff best design becomes dog didnt know factors existed until started build own planes day flew thought should next day someone taken flubber out took place under aimost same wind condi tions As learned later wind same air very different day test flying new wing shaped Jack Chambers JC-14 airfoil Something wasnt right tried adding weight taking out made adjustment after adjustContinued page 157 VACUUM BAG UM BAG UM BAG UM BAG SUCKER-KIT manually controlled vacuum bag system makes lay up process combination foam & skins trouble free fast first time SUCKER-KIT$5995 VHS Show & Tell Video$3995 Add $400 shipping & handling MI residents add 40/a sales tax Send $100 SASE product list samples real wood veneer skins Product List Includes Gapless Arrow Shaft Hinges Carbon Tow Mylar Sheet High-Tech items Dealer Inquires Welcome SEND CHECK OR MONEY ORDER TO Box 866 Lapeer Ml 48446 313 664-3330 Polyhedral Wing-$41 PP Aileron Wmg-$46 PP versatile 1/2 meter wingspan Foam Wing Glider Piloted Paul Wilson crewed Rusty Shaw & Leroy Satterlee Chupersoas designers set Glass record 66 miles Eppler 214 Tersy Edmonds famous pair thermal duration 10 has superior per formance 2 meter events CALLISTO takes over dominate standard class May 1989 49 perfect running mate Vortechs P-51 Zero Check text Infor mation Vortechs P-51 new Zero Composite Aircraft Eng & Supplypo Jeff Fukushima Vortech Models P-51 Mustang Designed fly wherever fly aileron planes Jeffs P-Si another fine ex ample power scale Plc Charlie Moray 8971 AVAILABLE AT AMERICAS FINEST HOBBY SHOPS 69786528 DISTRIBUTED BY sMInhII RED WDYZRZD 7660 So, Gobriel Rood cadero CA 95422 806 466-1717 FROM IIAVEY YSTEMS ir really slick trainers little hassles building taken out box before open birds simple build pretty look small parts well sides tail feathers pre cut ready quick assembly Youll air flying own faster ever expected AT-50 four channel advanced trainer 19-30 engines scale look flies rock stable like pattern bird has wide speed range Has 50 span semi-symme trical airfoil 400 sq area Both kits feature rolled plans step-by step instructions hardware wheel pants formed gear accurately die machine cut selected woods BT-20 three channel trainer 15-25 engines Has fully sheeted flat bottom wing can built optional ailerons 50 span 400 sq area IAVEY675 TOWER LANE YSTEMS WEST CHESTER PA 19380 oRPORATIoN tial interference distant sources number measures can take reduce eliminate skywave interfer ence problems some suggestions 1 Use good quality narrow-band re ceiver conforming 1991 specifications especially important source interference transmitter operating frequency absolutely identical fre quency RC equipment 2 Use PCM radio its inherent abil ity reject interference 3 Avoid flying very high far away transmitter 4 Make sure radio equipment properly tuuled adjusted tactics will provide measure protection hits outside sources may already have noticed interfer ence radio glitches six-meter RC equipment functioned reliably past Cycle #22 could quite pos sibly cause *Contact American Radio Relay League 225 Main Street Newington CT 06111 information about ama teur radio bulletins broadcast what information contain ARRL also excellent source information about am ateur radio electronics theory short wave listening League can help get amateur operators license show build electronic equipment tennas provide easily digested information concerning electrical elec tronics theory Theres brief section current ARRL Handbook about Radio Control equipment principles RC Giant Scale/de Vries Continued page 47 new catalogs Both have added substantially copious lists photo packs well stores Scale drawings Bobs list Scale Model Research 2334 Ticonderoga Costa Mesa CA 92626 $3 Docs Scale Plans & Photo Ser vice 3209 Madison Ave Greensboro NC 27403 also $3 North American modelers Bob notes overseas air mail $250 Doc air mails catalog overseas addi tional $2 postage Emil Neelys latest Ikon NWest PO Box 306 Post Falls ID 83854 Giant Scale ver sion Curtiss Robin Emils done both OX-S Curtiss Challenger-powered ver sions venerable Robin both apparently fly delightfully good stable model yours truly remembers good old days Co met 6-ft-span Free Flight version same prototype Mine flew well Dennymite en gine up front What improvements en gines Emils design should good starting point Giant Scale novice Span 98 flying weight about 14 lb 108 powers Ikon test model An Ikon NWest catalog kits available same address three buckswhich seems popular number month Emil Agostas current project huge Bucker Jungmeister Span 863 Length 745 cowl almost foot diameter theres big bipe future contact Mr Agosta care Dry Ridge Models 59 McCurry Road Weav erville NC 28787 indicates building drawings will run $60 per set should ready column appears final word month about 89 IMAA Rally Giants Les Hard editor High Flight notes years go will take place June 14-18 Odessa TX contact person Robbie Carson 6576 Amber Drive Odessa TX 79762 phone 915 368-5874 Pre-registration landing fee $15 June 1 on-site reg istration will $20 Like other IMAA rallies big un will relaxed fly/gab fest us Gi ant Scalers RC Slope Soaring/Triebes Continued page 49 ment flew again again Nothing seemed help about give up donate wing release tension up walked Jim Slatt Jim Slope masters hes made lot hand-shaped wooden wings told him what happening plane said maybe done poor job wing looked very carefully few minutes stated looked him like very good wing proper washout tips clean Phil lips entry leading edge saw nothing wrong suggested put away bring Out some other day wind blow ing hard fairly straight told him Theres plenty lift out Jim said strength wind can misleading should never judge flight characteristics new plane just days flight went tell once designed wing sure performer selected lowest density balsa out Continued page 161 May1989 157 4 w NEW FEATURES ADDED! Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability * User Selectable Cross Trim Capability * Flap Stick Reversing * Elevator Camber VTR * Automatic Selection High Ail Rudder Mixing Launch Landing Modes * New Feature Fully installed kit Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 AirtmnAsTh Module 75P registered trademarks Ainronics Inc RC Slope Soaring/Triebes Continued page 157 stash contest-grade wood went work done could hardly wait fly sure would best-flying plane hed made date flight day disheartening took wing home hung back garage Six months later dug out gave another try everything thought should moral story said never judge something build flying least five different days bit advice stuck read book loaned friend flies hang gliders some questions began answered book called Flying Conditions Micro-meteorology Pilots Dennis Pagan Its written mainly about hang gliders sailplanes conditions same RC Slope pilots Knowing about aerodynamics important building good Slope plane Knowing about dynamics air equally important Im working private pilot rating things Im learning have lot condition air Understanding different factors volved flying now important cause welfare pilot just air craft major consideration ATRCSTM Advaneed Technology Radio control Sysleni Works standard FM/PPM Receivers AirtronicsTh PCM Receivers Converts Module 75P advanced computerized control system LiftWhat Look part two Ill go little depth about what makes good lift what can cause change study atmospheric phenomena very complicated involves lot strange formulas wont go much detail want best place start Dennis Pagans book mentioned earlier Ill keep simple four main factors involved creat ing lift 1 Air density 2 Entry path slope 3 Wind direction relation slope 4 Size shape slope Air density misunderstood ignored aspect lift dynamics two main influences dictate what density air will betemperature humidity two factors can turn small breeze booming lift take punch Out good strong wind air hot humid its less dense especially its foggy Some people out probably saying wa ter air has thicker wont go long dissertation Ill add water molecules force air mole cules spread apart isnt very complete explanation dont want torn seven-part series Now important everyone Elevator /70y// Camber% I/il/I I/72W/ 0 070 100 Elevator Stick Position % flies place great conditions day find yourself sweating through acrobatic ma neuvers easy few days earlier wind blowing hard right direc tion might because change den sity air So recap Dry cool good Hot wet bad Entry path slope refers what wind has go over its way slopebe water ground objects size wind comes right over water will develop no tur bulence therefore generate smooth lift blows over ground no matter smooth unobstructed will have turbulence associ ated lift makes closer obstruc tions slope worse gets trees houses other objects way turbulence create can felt thousands yards past object spawned An example apparent Long Beachs Bluff Park around 11 am noon wind usually coming straight lift good about 1 pm will switch west just few degrees puts line some offshore oil rigs least 600 yards away lift gets very patchy until switches little west clear oil rigs smoothes out flying good again brings us next factor Wind direction relation slope Tidewater Hobby Enterprises l4U SE41t SU*E*flELDFL32691 904 245-4653 FOR AMERICAN QUALITY FOR SUPERIOR PERFORMANCE FOR PROSUCTI YOU CAN NE PROUD OF QUALITY STANSANSI AT TIDEWATER ARE NECESSARILY HIGH BECAUSE THE ElI ME MANUFACTURE IS TUE PRIER YOU TARE TO THE FUELS COMPLETE LINE AVIALARLE AT QUALITY NORHY SHOPS * 64 SIMISYMITRICAL WING WING AREA * 4 CHANNEL CYCLI 90 4CYCLE LITU WEIGHT ILE I8195 * COMPLETE RUT FOLISHEE ALUM LANSING GEAR * ALL HEWE * 5 TAIL WHEEL * H OZ HAYES FUEL TARE * 3 MAIN WHEELS * UDJOY PERFORMING LOOPS S * SPINS SPINS * * SNAP ROLLS L TURNS RTLESS TOSCN ARE COS * May1989 161 850 Clevis Remover Clevis Remover designed especially sit uations clevis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm clevis tilt right towards thread ed part clevis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Carter St Vidalia LA 71373 316336-5606 dukes ture motor quits wrong time still fuel tank blood pressure goes u sometimes airplanes get bent Unfortunately no simple answer like replace transistor XAC will happy However some systematic exploration problems can usually sorted Out corrected First important understand made plane motor quits unexpectedly 99 times Out 100 either isnt gettingfuel else glow plug has cooled point wont fire Ilameout Aflameaut usually occurs motor has idled back quits upon giving throttle An interruptedfuelJlow usually cause motor quits aefi ill powei nearlyfidlpower Nowfirst lets consider possible causes offuel interruption motor seems run well ground thefint two three minutes theflight quits put airplane climb can almost always assume tank tube has cut hole flopper tube slips over sharp tank tube end thefuel level burned down little bit airplane nosed up hole uncovered motor sucks air dies fuel starvation second possible problem sometimes jlopper tube willfallforward get stuck third cause offuelfiow interruption caused too long tank flopper tube afast pass situation fuel wants fall forward approach enough downward pitch bring flopperforward solution seems work well shorten theflopper tube theflopper tube weight abaut 2/3 way back tank way tank has almost empty before effect becomes evident seem explain problem reasonable assume have dirt some obstruction somewhere fuel line Flameout problems harder put yourfinger First thing tsy new glow plug Veiy often aglow plug will come coated impurities some type will become ineffective new glow plug doesnt correct flameout problem go over low speed mixture adjustment procedure Fox motors have best result enough fuel carburetor crankcase motor run 6 8 seconds after shut off check running motor idle glow plug heater pinch thefuel line just back nipple motor runs 8 seconds want lean low speed needle stops immediately want back out little until run-on time achieved should done high speed needle set rich side After low speed set set high speed accordance airplanes needs restriction exhaust pressure supply will tend flood motor athrottle back situation porticularly large spongy plastic tank solution clear line enlarge pressure fitting hole unusualfor light high powered model have carburetor properly set give throttle take-off motor staggers caused cavitation thefuel line good 40 size motor will produce 6 7 pounds thrust takeoff ifyou have 4 pound airplane no way fuel going continue tofeed carburetoc can sometimes trick situation routing fuel line around thefrone carburetor looping carburetor isa httle fuel line post cavitation point often made mistakes idling motor too rich motor will continue idle very well surprising amount offuel accumulated crankcase However advance throttle motor speeds upi sprayed upper cylinder pretty hard keep aglow plug lit afuel stream spraying iv solution course adjust low speed needle leaner Some lesser likely causes motor quitting have run across asfollows Once Ifound piece offuel tubing sliver inside become peeled off acted like afoot valve would pass fuel slowly thefuel demand became great piece tended flop over close passage Another time customer brought motor just positively would idle run partial throttle Upon disassembling motor wefound owner hopped motor up smoothing out ports radiusing upper lip piston particular case small rodius completely changed scavagingflow byposs spraying glow plug Now another cause motor quitting idle low throttle moisture thefuel takes 8 10 drops water gallon offuel completely destroy idling ability day might have 95% humidity leave lid offfor 1/2 hour what going happen thefuel will evaporate evaporates cools becomes cooler surrounding air reaches dew point Water condenses wall container bath inside outside water outside course doesnt anything water inside becomes mixed thefuel prestoyou have haifa jug offuel wont idle worth aXXXX solution toss get another can Probably best insurance can buy against aflameout use Fox Mirocle Plug Ifyou havent tried should Happy Flying 6L~k Manufacturing Company 5305 Toweon Avenue Fort Smith AR 72901 Phone 501 64-1656 ones easy straightet wind blows sttonget lift wind angle becomes less perpendicular slope less lift Size shape slope Smooth solid air straight no obstructions means zilch has nothing blow against Ya gotta have hill dimensions hill cliff slope bump what puts together self-evident higher up better vertical better dont limit yourself just natural heaps dirt rocks some places might never think place fly Sometimes use Olympic pool building Belmont Shore because its got big flat wail facing wind friend stationed Oklahoma few months used hay barns get lift Watch seagulls other soaring birds see what use free ride try same Well thats hope gives some thing work opens up flying pos sibilities important part observant Watch what happens places fly time youll get know good surfer knows kind wave because fun depends wave similaronly invisible dont know look Slope Soaring News great publication Slope fliers does contain interesting articles like Chucks also has great kit re views fantastic photos informative looks such things building fiberglass fuselages vac uum bagging advanced radio techniques would like have another great source Soaring information one-year subscrip tions available $1595 check payable Charles Morey address Slope Soaring News 2601 E 19th St #29 Signal Hill CA 90804 Vortech Models P-Si Zero Jeff Fukn shima better-known fliers south ern California now producing Slope Scale kits P-Si Zero following what Slope Soaring News say about Jeffs P 51 kit Jeff produces complete P-Si Mustang kit fi berglass fuselage foam cores plans wood fuselage piece other words does assembly two halves feature makes kit easy build fiberglass-fuselage foam-core Slope plane airfoil semisymnhetrical configuration wing sheeted / plywood No doesnt come already sheeted have Jeffs P-Si flies Long Beach model should fly just about anywhere Zero brand-new looks great Jeff has reached agreement Bob Ratzlaff Wilshire Model Center sell kits Contact Wilshire Models 2836 Santa Monlca Blvd Santa Monica CA 90404 ph 213 828-9362 information Rohacell Composite materials becoming commonplace todays Sailplanes exciting useful products come along some time Rohacell Matt Gewain Composite Structures Technology sent some small samples test have say stuff amazing what Matt has say about As aeronautical engineer serious FM competitor last 12 years have tried nu merous construction methods closely watched development composite models Europe Recentiy have settled wing con struction method utilizing Kevlar carbon fiber extensively reinforcement balsa foam core materials However polysty rene polyurethane foams tried lacked com patibility model products resulting excessive weight finlshed addition foam compressed easily weakening model creating problems vacuum molding technlques used applying Kevlar carbon fiber Seeking solution led foam product best Euro pean modelers have using years great resultsRohacell Rohacell compatible current model ing adhesives finishes Plus works very easily much like balsawood times stronger polyurethane polystyrene foams modelers familiar 19 lb per Cu ft density F3B World Champion Raif Decker several noteworthy European fliers utiliz ing Rohacell build top competition machines Reiner Hofsas winner FiB 1985 Free Flight World Championships utilized Rohacell carbon fiber later Espada Wakefield FlB models Thomas Koster has used Rohacell foam several years development all-composite FiC models search perfect core material discovered other modelers also terested trying Rohacell experience along success others has convinced material has tremendous potential types modeling serious competitor ad vantages ease construction weight savings strength far outweigh somewhat higher price compared conventional materials Therefore am making Rohacell available modelers via Composite Structures Technology Dept JR2 3701 Inglewood Ave #268 Ingle wood CA 90287 162 Model Aviation tic /C ad fly Leisure Playboy LanZO Bomber valuable electric RIC lessOfl5• ight Fundamental good electric flight weight airframe Leisures Playboy ters both feature jghtWeight airframes takeoff climb capabilities long flights slow ~ndings n build4n stabilitY easy flying original Playboy Bomber designs started two old timers fly hands off too make perfect RIC trainer imnortant lesson Leisure PlayboY teach tO open up see because theyre electric silent can fly almost hobbY dealer pick up Leisure r kit inexpensive LeiSure 05 some good lessons Also available CST Keviar fiberglass cloth 56 oz 6 oz Safe-T-Poxy mold re lease spray vacuum bag sealant ready step up composite technology products may just what looking Pteranodon Press times have tried enlarge shrink airfoil meet needs resort TLAR Looks About Right conclusion like answer question lotsa times number books available show various plots namely Eppler series usually have ex act size want Now thing past Available Pteranodon Press plots size 300 different air foils Rich Neveln mastermind behind Pter anodon Press supplier great ser vice $2 large SASE Rich will send list available airfoils samples order ing info address Pteranodon Press PO Box 3650 Galdand CA 94609-0650 RC Electrics/Kopski Continued page 51 hundreds flights same motor same 12-cell flight battery pack past summer saw rekindled interest part night flying manifestation wing pods have added orig inal Eureka removable balsa pods rub berbanded place fact have used Astro Challenger well call pods Il luminons Illuminons 25-oz balsa struc tures about 17 long contain two 250 mAh cells switch charge jack two lens assem blies toy flashlights pointing ward aft Connections soldered dinary replaceable flashlight bulbs front Illuminon covered transparent yellow MonoKote rear red transparent addi tion several 18-in-long -in-wide strips chrome MonoKote taped rear II luminon what get Nighttime brilli ance dazzling fun multicolored Illumi nons permit full realization model attitude flightpath total darkness spotlight flashlight lens assemblies up front permit dead head-on landing approaches hori zon trailing chrome streamers provide brilli ant fiery afterburner appearance model flies away flight line short its sheer dazzlement may interested strongly recommend type flying docile models skilled pilots thoroughly fa miliar daylight flight characteristics said docile planes Otherwisego Its whole new fun-filled modeling variantbest done quiet clean Electric power course Eleetrostreak kit Great Planes mentioned last months column Im pass ing along suggestion may inter est anyone building As designed Elec trostreak has fully boxed-in nose section motor mount wing leading edge sides top bottom sheeting glued place same time plans show installing speed control receiver battery area just behind motor Well bit challenge tooshort too-fat fingers got very quickiy frustrat ed whole idea proceeded modiIi structure shown photos Sim ply putI installed good ol fashioned hatch As shown hatch fits down recess formed adding some 42 x Y6-in strip top outer edges fuselage sidesright top installed triangle stock area tri angle stock trimmed back inside edges inside step now formed about /6 wide Some top sheeting glued place shown leading edge location top fuselage front over motor formers latter sheeting extends rearward past rear motor former about /16 simple hatch cover made /32 balsa 4-in-wide /64 ply strip glued down side middle shown cover fits re cess formed described above flush glued-in-place top sheeting small tongue ply extends forward cover toes-in underneath front top sheet small plastic catch shown landing gear strap will installed #2 sheet metal screw center balsa top plate leading edge position will swing over rear edge hatch cover hold down swing away desired lift hatch off Either receiver pack speed control whatever can still attached underside hatch double-sticky Velcro originally intended Im sure modification will make fi nal installation subsequent maintenance much pleasant us such fin gers Iand everyone else too Putting alternative general wayI cant imagine Electric having access hatch Continued page 166 May1989 163
Edition: Model Aviation - 1989/05
Page Numbers: 48, 49, 157, 161, 162, 163
INTERNATIONAL RC Scale Soaring Fun-Fly coming up recently received update Wil Byers years fun-fly Heres what say weekend Memorial Day 1988 weekend first-ever National RC Scale Soar ing Fun-Fly Soaring Social event marked outstanding enthusiasm tremen dous support Soaring community As result event will probably go down Soar ing annuals genuine success therefore Tn-City Soarers feel worthy repeating 1989 Now attended enjoyed yourself want invite come back share event us again however able attend last year think event kind Soaring happening want part heartily welcome come TnCities participate International RC Scale Soaring Fun-Fly May 26 27 28 1989 goal years event attract entrants over world well US Canada successful endeavor will have opportunity share other fine craftsmanship flying skills participation vital end Whether its because youre meticulous crafts man talented flier just all-around nice guy would absolutely miss able attend want Think about much fun would have regis ter great Soaring experience will again using Clover Island Mo tor Inn fun-fly headquarters hotel has greatly improved through complete remod eling management hospitable last year restaurant has added new menu view rooms still just great ever Columbia River flowing just feet away room beautiful desert mountains distance Tn-Cities Soarers genuinely hope registering right now will soon get chance meet see models action Make note re ceive registration will enter event about month prior event will send information packet packet will include maps telephone numbers site location directions Additionally sug gest register early make room res ervation making reservations hotel please indicate Soaring group course get Glider done order Lastly Tri-Cities has picked site 1989 AMA National Championships year will include AMA sanctioned one-day Slope race feel testa ment slopes second provided wind cooperates plans will rewarded fun-fly enjoyable times Soaring life Viking F3F Slope Race event will held Denmark June 1 1989 opportunity see some best Slope fliers world received letter Dale Willoughby will competitors US Dale will team manager/competitor anyone dwel ling east Mississippi River bound Denmark plan attending event get touch Dale soon possible ad dress PO Box 927 Jacksonville NC 285410927 Lift following two-part article ap peared two recent issues Slope Soaring News Written Chuck Korolden discusses what lift find LiftWhat What stupid question Lift Its what live its Just because wind blowing up slope good clip doesnt mean lift good fact wind velocity ladder impor tance several rungs below other factors present readily obvious True Maniah other factors come moot function gether whole called life an lift bout Freudian slip keyboard Lift combination wind velocity Left Members White Sheet Radio Fiying Ciub recent ciub Scaie competition WSRFC premier Siope ciubs UK Obviously specallze Scaie modeiing Right David Brigga waIts judging circie gorgeous quarter-scaie Twin Acoro Southwest main bowi Slope background site has plenty room iand glider Photos Sean Waibank 48 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisier Ct Saratoga CA 95070 Doug Hertzog copilot Troy gets ready aunch Dougs Siihouette Silhouette new kit being produced Doug come future articie Photo Charile Morey air density As long air going up faster plane goes down stay up Soar ing performance has quality air speed its rising two forces optimum planes fly well things arent up snuff best design becomes dog didnt know factors existed until started build own planes day flew thought should next day someone taken flubber out took place under aimost same wind condi tions As learned later wind same air very different day test flying new wing shaped Jack Chambers JC-14 airfoil Something wasnt right tried adding weight taking out made adjustment after adjustContinued page 157 VACUUM BAG UM BAG UM BAG UM BAG SUCKER-KIT manually controlled vacuum bag system makes lay up process combination foam & skins trouble free fast first time SUCKER-KIT$5995 VHS Show & Tell Video$3995 Add $400 shipping & handling MI residents add 40/a sales tax Send $100 SASE product list samples real wood veneer skins Product List Includes Gapless Arrow Shaft Hinges Carbon Tow Mylar Sheet High-Tech items Dealer Inquires Welcome SEND CHECK OR MONEY ORDER TO Box 866 Lapeer Ml 48446 313 664-3330 Polyhedral Wing-$41 PP Aileron Wmg-$46 PP versatile 1/2 meter wingspan Foam Wing Glider Piloted Paul Wilson crewed Rusty Shaw & Leroy Satterlee Chupersoas designers set Glass record 66 miles Eppler 214 Tersy Edmonds famous pair thermal duration 10 has superior per formance 2 meter events CALLISTO takes over dominate standard class May 1989 49 perfect running mate Vortechs P-51 Zero Check text Infor mation Vortechs P-51 new Zero Composite Aircraft Eng & Supplypo Jeff Fukushima Vortech Models P-51 Mustang Designed fly wherever fly aileron planes Jeffs P-Si another fine ex ample power scale Plc Charlie Moray 8971 AVAILABLE AT AMERICAS FINEST HOBBY SHOPS 69786528 DISTRIBUTED BY sMInhII RED WDYZRZD 7660 So, Gobriel Rood cadero CA 95422 806 466-1717 FROM IIAVEY YSTEMS ir really slick trainers little hassles building taken out box before open birds simple build pretty look small parts well sides tail feathers pre cut ready quick assembly Youll air flying own faster ever expected AT-50 four channel advanced trainer 19-30 engines scale look flies rock stable like pattern bird has wide speed range Has 50 span semi-symme trical airfoil 400 sq area Both kits feature rolled plans step-by step instructions hardware wheel pants formed gear accurately die machine cut selected woods BT-20 three channel trainer 15-25 engines Has fully sheeted flat bottom wing can built optional ailerons 50 span 400 sq area IAVEY675 TOWER LANE YSTEMS WEST CHESTER PA 19380 oRPORATIoN tial interference distant sources number measures can take reduce eliminate skywave interfer ence problems some suggestions 1 Use good quality narrow-band re ceiver conforming 1991 specifications especially important source interference transmitter operating frequency absolutely identical fre quency RC equipment 2 Use PCM radio its inherent abil ity reject interference 3 Avoid flying very high far away transmitter 4 Make sure radio equipment properly tuuled adjusted tactics will provide measure protection hits outside sources may already have noticed interfer ence radio glitches six-meter RC equipment functioned reliably past Cycle #22 could quite pos sibly cause *Contact American Radio Relay League 225 Main Street Newington CT 06111 information about ama teur radio bulletins broadcast what information contain ARRL also excellent source information about am ateur radio electronics theory short wave listening League can help get amateur operators license show build electronic equipment tennas provide easily digested information concerning electrical elec tronics theory Theres brief section current ARRL Handbook about Radio Control equipment principles RC Giant Scale/de Vries Continued page 47 new catalogs Both have added substantially copious lists photo packs well stores Scale drawings Bobs list Scale Model Research 2334 Ticonderoga Costa Mesa CA 92626 $3 Docs Scale Plans & Photo Ser vice 3209 Madison Ave Greensboro NC 27403 also $3 North American modelers Bob notes overseas air mail $250 Doc air mails catalog overseas addi tional $2 postage Emil Neelys latest Ikon NWest PO Box 306 Post Falls ID 83854 Giant Scale ver sion Curtiss Robin Emils done both OX-S Curtiss Challenger-powered ver sions venerable Robin both apparently fly delightfully good stable model yours truly remembers good old days Co met 6-ft-span Free Flight version same prototype Mine flew well Dennymite en gine up front What improvements en gines Emils design should good starting point Giant Scale novice Span 98 flying weight about 14 lb 108 powers Ikon test model An Ikon NWest catalog kits available same address three buckswhich seems popular number month Emil Agostas current project huge Bucker Jungmeister Span 863 Length 745 cowl almost foot diameter theres big bipe future contact Mr Agosta care Dry Ridge Models 59 McCurry Road Weav erville NC 28787 indicates building drawings will run $60 per set should ready column appears final word month about 89 IMAA Rally Giants Les Hard editor High Flight notes years go will take place June 14-18 Odessa TX contact person Robbie Carson 6576 Amber Drive Odessa TX 79762 phone 915 368-5874 Pre-registration landing fee $15 June 1 on-site reg istration will $20 Like other IMAA rallies big un will relaxed fly/gab fest us Gi ant Scalers RC Slope Soaring/Triebes Continued page 49 ment flew again again Nothing seemed help about give up donate wing release tension up walked Jim Slatt Jim Slope masters hes made lot hand-shaped wooden wings told him what happening plane said maybe done poor job wing looked very carefully few minutes stated looked him like very good wing proper washout tips clean Phil lips entry leading edge saw nothing wrong suggested put away bring Out some other day wind blow ing hard fairly straight told him Theres plenty lift out Jim said strength wind can misleading should never judge flight characteristics new plane just days flight went tell once designed wing sure performer selected lowest density balsa out Continued page 161 May1989 157 4 w NEW FEATURES ADDED! Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability * User Selectable Cross Trim Capability * Flap Stick Reversing * Elevator Camber VTR * Automatic Selection High Ail Rudder Mixing Launch Landing Modes * New Feature Fully installed kit Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 AirtmnAsTh Module 75P registered trademarks Ainronics Inc RC Slope Soaring/Triebes Continued page 157 stash contest-grade wood went work done could hardly wait fly sure would best-flying plane hed made date flight day disheartening took wing home hung back garage Six months later dug out gave another try everything thought should moral story said never judge something build flying least five different days bit advice stuck read book loaned friend flies hang gliders some questions began answered book called Flying Conditions Micro-meteorology Pilots Dennis Pagan Its written mainly about hang gliders sailplanes conditions same RC Slope pilots Knowing about aerodynamics important building good Slope plane Knowing about dynamics air equally important Im working private pilot rating things Im learning have lot condition air Understanding different factors volved flying now important cause welfare pilot just air craft major consideration ATRCSTM Advaneed Technology Radio control Sysleni Works standard FM/PPM Receivers AirtronicsTh PCM Receivers Converts Module 75P advanced computerized control system LiftWhat Look part two Ill go little depth about what makes good lift what can cause change study atmospheric phenomena very complicated involves lot strange formulas wont go much detail want best place start Dennis Pagans book mentioned earlier Ill keep simple four main factors involved creat ing lift 1 Air density 2 Entry path slope 3 Wind direction relation slope 4 Size shape slope Air density misunderstood ignored aspect lift dynamics two main influences dictate what density air will betemperature humidity two factors can turn small breeze booming lift take punch Out good strong wind air hot humid its less dense especially its foggy Some people out probably saying wa ter air has thicker wont go long dissertation Ill add water molecules force air mole cules spread apart isnt very complete explanation dont want torn seven-part series Now important everyone Elevator /70y// Camber% I/il/I I/72W/ 0 070 100 Elevator Stick Position % flies place great conditions day find yourself sweating through acrobatic ma neuvers easy few days earlier wind blowing hard right direc tion might because change den sity air So recap Dry cool good Hot wet bad Entry path slope refers what wind has go over its way slopebe water ground objects size wind comes right over water will develop no tur bulence therefore generate smooth lift blows over ground no matter smooth unobstructed will have turbulence associ ated lift makes closer obstruc tions slope worse gets trees houses other objects way turbulence create can felt thousands yards past object spawned An example apparent Long Beachs Bluff Park around 11 am noon wind usually coming straight lift good about 1 pm will switch west just few degrees puts line some offshore oil rigs least 600 yards away lift gets very patchy until switches little west clear oil rigs smoothes out flying good again brings us next factor Wind direction relation slope Tidewater Hobby Enterprises l4U SE41t SU*E*flELDFL32691 904 245-4653 FOR AMERICAN QUALITY FOR SUPERIOR PERFORMANCE FOR PROSUCTI YOU CAN NE PROUD OF QUALITY STANSANSI AT TIDEWATER ARE NECESSARILY HIGH BECAUSE THE ElI ME MANUFACTURE IS TUE PRIER YOU TARE TO THE FUELS COMPLETE LINE AVIALARLE AT QUALITY NORHY SHOPS * 64 SIMISYMITRICAL WING WING AREA * 4 CHANNEL CYCLI 90 4CYCLE LITU WEIGHT ILE I8195 * COMPLETE RUT FOLISHEE ALUM LANSING GEAR * ALL HEWE * 5 TAIL WHEEL * H OZ HAYES FUEL TARE * 3 MAIN WHEELS * UDJOY PERFORMING LOOPS S * SPINS SPINS * * SNAP ROLLS L TURNS RTLESS TOSCN ARE COS * May1989 161 850 Clevis Remover Clevis Remover designed especially sit uations clevis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm clevis tilt right towards thread ed part clevis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Carter St Vidalia LA 71373 316336-5606 dukes ture motor quits wrong time still fuel tank blood pressure goes u sometimes airplanes get bent Unfortunately no simple answer like replace transistor XAC will happy However some systematic exploration problems can usually sorted Out corrected First important understand made plane motor quits unexpectedly 99 times Out 100 either isnt gettingfuel else glow plug has cooled point wont fire Ilameout Aflameaut usually occurs motor has idled back quits upon giving throttle An interruptedfuelJlow usually cause motor quits aefi ill powei nearlyfidlpower Nowfirst lets consider possible causes offuel interruption motor seems run well ground thefint two three minutes theflight quits put airplane climb can almost always assume tank tube has cut hole flopper tube slips over sharp tank tube end thefuel level burned down little bit airplane nosed up hole uncovered motor sucks air dies fuel starvation second possible problem sometimes jlopper tube willfallforward get stuck third cause offuelfiow interruption caused too long tank flopper tube afast pass situation fuel wants fall forward approach enough downward pitch bring flopperforward solution seems work well shorten theflopper tube theflopper tube weight abaut 2/3 way back tank way tank has almost empty before effect becomes evident seem explain problem reasonable assume have dirt some obstruction somewhere fuel line Flameout problems harder put yourfinger First thing tsy new glow plug Veiy often aglow plug will come coated impurities some type will become ineffective new glow plug doesnt correct flameout problem go over low speed mixture adjustment procedure Fox motors have best result enough fuel carburetor crankcase motor run 6 8 seconds after shut off check running motor idle glow plug heater pinch thefuel line just back nipple motor runs 8 seconds want lean low speed needle stops immediately want back out little until run-on time achieved should done high speed needle set rich side After low speed set set high speed accordance airplanes needs restriction exhaust pressure supply will tend flood motor athrottle back situation porticularly large spongy plastic tank solution clear line enlarge pressure fitting hole unusualfor light high powered model have carburetor properly set give throttle take-off motor staggers caused cavitation thefuel line good 40 size motor will produce 6 7 pounds thrust takeoff ifyou have 4 pound airplane no way fuel going continue tofeed carburetoc can sometimes trick situation routing fuel line around thefrone carburetor looping carburetor isa httle fuel line post cavitation point often made mistakes idling motor too rich motor will continue idle very well surprising amount offuel accumulated crankcase However advance throttle motor speeds upi sprayed upper cylinder pretty hard keep aglow plug lit afuel stream spraying iv solution course adjust low speed needle leaner Some lesser likely causes motor quitting have run across asfollows Once Ifound piece offuel tubing sliver inside become peeled off acted like afoot valve would pass fuel slowly thefuel demand became great piece tended flop over close passage Another time customer brought motor just positively would idle run partial throttle Upon disassembling motor wefound owner hopped motor up smoothing out ports radiusing upper lip piston particular case small rodius completely changed scavagingflow byposs spraying glow plug Now another cause motor quitting idle low throttle moisture thefuel takes 8 10 drops water gallon offuel completely destroy idling ability day might have 95% humidity leave lid offfor 1/2 hour what going happen thefuel will evaporate evaporates cools becomes cooler surrounding air reaches dew point Water condenses wall container bath inside outside water outside course doesnt anything water inside becomes mixed thefuel prestoyou have haifa jug offuel wont idle worth aXXXX solution toss get another can Probably best insurance can buy against aflameout use Fox Mirocle Plug Ifyou havent tried should Happy Flying 6L~k Manufacturing Company 5305 Toweon Avenue Fort Smith AR 72901 Phone 501 64-1656 ones easy straightet wind blows sttonget lift wind angle becomes less perpendicular slope less lift Size shape slope Smooth solid air straight no obstructions means zilch has nothing blow against Ya gotta have hill dimensions hill cliff slope bump what puts together self-evident higher up better vertical better dont limit yourself just natural heaps dirt rocks some places might never think place fly Sometimes use Olympic pool building Belmont Shore because its got big flat wail facing wind friend stationed Oklahoma few months used hay barns get lift Watch seagulls other soaring birds see what use free ride try same Well thats hope gives some thing work opens up flying pos sibilities important part observant Watch what happens places fly time youll get know good surfer knows kind wave because fun depends wave similaronly invisible dont know look Slope Soaring News great publication Slope fliers does contain interesting articles like Chucks also has great kit re views fantastic photos informative looks such things building fiberglass fuselages vac uum bagging advanced radio techniques would like have another great source Soaring information one-year subscrip tions available $1595 check payable Charles Morey address Slope Soaring News 2601 E 19th St #29 Signal Hill CA 90804 Vortech Models P-Si Zero Jeff Fukn shima better-known fliers south ern California now producing Slope Scale kits P-Si Zero following what Slope Soaring News say about Jeffs P 51 kit Jeff produces complete P-Si Mustang kit fi berglass fuselage foam cores plans wood fuselage piece other words does assembly two halves feature makes kit easy build fiberglass-fuselage foam-core Slope plane airfoil semisymnhetrical configuration wing sheeted / plywood No doesnt come already sheeted have Jeffs P-Si flies Long Beach model should fly just about anywhere Zero brand-new looks great Jeff has reached agreement Bob Ratzlaff Wilshire Model Center sell kits Contact Wilshire Models 2836 Santa Monlca Blvd Santa Monica CA 90404 ph 213 828-9362 information Rohacell Composite materials becoming commonplace todays Sailplanes exciting useful products come along some time Rohacell Matt Gewain Composite Structures Technology sent some small samples test have say stuff amazing what Matt has say about As aeronautical engineer serious FM competitor last 12 years have tried nu merous construction methods closely watched development composite models Europe Recentiy have settled wing con struction method utilizing Kevlar carbon fiber extensively reinforcement balsa foam core materials However polysty rene polyurethane foams tried lacked com patibility model products resulting excessive weight finlshed addition foam compressed easily weakening model creating problems vacuum molding technlques used applying Kevlar carbon fiber Seeking solution led foam product best Euro pean modelers have using years great resultsRohacell Rohacell compatible current model ing adhesives finishes Plus works very easily much like balsawood times stronger polyurethane polystyrene foams modelers familiar 19 lb per Cu ft density F3B World Champion Raif Decker several noteworthy European fliers utiliz ing Rohacell build top competition machines Reiner Hofsas winner FiB 1985 Free Flight World Championships utilized Rohacell carbon fiber later Espada Wakefield FlB models Thomas Koster has used Rohacell foam several years development all-composite FiC models search perfect core material discovered other modelers also terested trying Rohacell experience along success others has convinced material has tremendous potential types modeling serious competitor ad vantages ease construction weight savings strength far outweigh somewhat higher price compared conventional materials Therefore am making Rohacell available modelers via Composite Structures Technology Dept JR2 3701 Inglewood Ave #268 Ingle wood CA 90287 162 Model Aviation tic /C ad fly Leisure Playboy LanZO Bomber valuable electric RIC lessOfl5• ight Fundamental good electric flight weight airframe Leisures Playboy ters both feature jghtWeight airframes takeoff climb capabilities long flights slow ~ndings n build4n stabilitY easy flying original Playboy Bomber designs started two old timers fly hands off too make perfect RIC trainer imnortant lesson Leisure PlayboY teach tO open up see because theyre electric silent can fly almost hobbY dealer pick up Leisure r kit inexpensive LeiSure 05 some good lessons Also available CST Keviar fiberglass cloth 56 oz 6 oz Safe-T-Poxy mold re lease spray vacuum bag sealant ready step up composite technology products may just what looking Pteranodon Press times have tried enlarge shrink airfoil meet needs resort TLAR Looks About Right conclusion like answer question lotsa times number books available show various plots namely Eppler series usually have ex act size want Now thing past Available Pteranodon Press plots size 300 different air foils Rich Neveln mastermind behind Pter anodon Press supplier great ser vice $2 large SASE Rich will send list available airfoils samples order ing info address Pteranodon Press PO Box 3650 Galdand CA 94609-0650 RC Electrics/Kopski Continued page 51 hundreds flights same motor same 12-cell flight battery pack past summer saw rekindled interest part night flying manifestation wing pods have added orig inal Eureka removable balsa pods rub berbanded place fact have used Astro Challenger well call pods Il luminons Illuminons 25-oz balsa struc tures about 17 long contain two 250 mAh cells switch charge jack two lens assem blies toy flashlights pointing ward aft Connections soldered dinary replaceable flashlight bulbs front Illuminon covered transparent yellow MonoKote rear red transparent addi tion several 18-in-long -in-wide strips chrome MonoKote taped rear II luminon what get Nighttime brilli ance dazzling fun multicolored Illumi nons permit full realization model attitude flightpath total darkness spotlight flashlight lens assemblies up front permit dead head-on landing approaches hori zon trailing chrome streamers provide brilli ant fiery afterburner appearance model flies away flight line short its sheer dazzlement may interested strongly recommend type flying docile models skilled pilots thoroughly fa miliar daylight flight characteristics said docile planes Otherwisego Its whole new fun-filled modeling variantbest done quiet clean Electric power course Eleetrostreak kit Great Planes mentioned last months column Im pass ing along suggestion may inter est anyone building As designed Elec trostreak has fully boxed-in nose section motor mount wing leading edge sides top bottom sheeting glued place same time plans show installing speed control receiver battery area just behind motor Well bit challenge tooshort too-fat fingers got very quickiy frustrat ed whole idea proceeded modiIi structure shown photos Sim ply putI installed good ol fashioned hatch As shown hatch fits down recess formed adding some 42 x Y6-in strip top outer edges fuselage sidesright top installed triangle stock area tri angle stock trimmed back inside edges inside step now formed about /6 wide Some top sheeting glued place shown leading edge location top fuselage front over motor formers latter sheeting extends rearward past rear motor former about /16 simple hatch cover made /32 balsa 4-in-wide /64 ply strip glued down side middle shown cover fits re cess formed described above flush glued-in-place top sheeting small tongue ply extends forward cover toes-in underneath front top sheet small plastic catch shown landing gear strap will installed #2 sheet metal screw center balsa top plate leading edge position will swing over rear edge hatch cover hold down swing away desired lift hatch off Either receiver pack speed control whatever can still attached underside hatch double-sticky Velcro originally intended Im sure modification will make fi nal installation subsequent maintenance much pleasant us such fin gers Iand everyone else too Putting alternative general wayI cant imagine Electric having access hatch Continued page 166 May1989 163
Edition: Model Aviation - 1989/05
Page Numbers: 48, 49, 157, 161, 162, 163
INTERNATIONAL RC Scale Soaring Fun-Fly coming up recently received update Wil Byers years fun-fly Heres what say weekend Memorial Day 1988 weekend first-ever National RC Scale Soar ing Fun-Fly Soaring Social event marked outstanding enthusiasm tremen dous support Soaring community As result event will probably go down Soar ing annuals genuine success therefore Tn-City Soarers feel worthy repeating 1989 Now attended enjoyed yourself want invite come back share event us again however able attend last year think event kind Soaring happening want part heartily welcome come TnCities participate International RC Scale Soaring Fun-Fly May 26 27 28 1989 goal years event attract entrants over world well US Canada successful endeavor will have opportunity share other fine craftsmanship flying skills participation vital end Whether its because youre meticulous crafts man talented flier just all-around nice guy would absolutely miss able attend want Think about much fun would have regis ter great Soaring experience will again using Clover Island Mo tor Inn fun-fly headquarters hotel has greatly improved through complete remod eling management hospitable last year restaurant has added new menu view rooms still just great ever Columbia River flowing just feet away room beautiful desert mountains distance Tn-Cities Soarers genuinely hope registering right now will soon get chance meet see models action Make note re ceive registration will enter event about month prior event will send information packet packet will include maps telephone numbers site location directions Additionally sug gest register early make room res ervation making reservations hotel please indicate Soaring group course get Glider done order Lastly Tri-Cities has picked site 1989 AMA National Championships year will include AMA sanctioned one-day Slope race feel testa ment slopes second provided wind cooperates plans will rewarded fun-fly enjoyable times Soaring life Viking F3F Slope Race event will held Denmark June 1 1989 opportunity see some best Slope fliers world received letter Dale Willoughby will competitors US Dale will team manager/competitor anyone dwel ling east Mississippi River bound Denmark plan attending event get touch Dale soon possible ad dress PO Box 927 Jacksonville NC 285410927 Lift following two-part article ap peared two recent issues Slope Soaring News Written Chuck Korolden discusses what lift find LiftWhat What stupid question Lift Its what live its Just because wind blowing up slope good clip doesnt mean lift good fact wind velocity ladder impor tance several rungs below other factors present readily obvious True Maniah other factors come moot function gether whole called life an lift bout Freudian slip keyboard Lift combination wind velocity Left Members White Sheet Radio Fiying Ciub recent ciub Scaie competition WSRFC premier Siope ciubs UK Obviously specallze Scaie modeiing Right David Brigga waIts judging circie gorgeous quarter-scaie Twin Acoro Southwest main bowi Slope background site has plenty room iand glider Photos Sean Waibank 48 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisier Ct Saratoga CA 95070 Doug Hertzog copilot Troy gets ready aunch Dougs Siihouette Silhouette new kit being produced Doug come future articie Photo Charile Morey air density As long air going up faster plane goes down stay up Soar ing performance has quality air speed its rising two forces optimum planes fly well things arent up snuff best design becomes dog didnt know factors existed until started build own planes day flew thought should next day someone taken flubber out took place under aimost same wind condi tions As learned later wind same air very different day test flying new wing shaped Jack Chambers JC-14 airfoil Something wasnt right tried adding weight taking out made adjustment after adjustContinued page 157 VACUUM BAG UM BAG UM BAG UM BAG SUCKER-KIT manually controlled vacuum bag system makes lay up process combination foam & skins trouble free fast first time SUCKER-KIT$5995 VHS Show & Tell Video$3995 Add $400 shipping & handling MI residents add 40/a sales tax Send $100 SASE product list samples real wood veneer skins Product List Includes Gapless Arrow Shaft Hinges Carbon Tow Mylar Sheet High-Tech items Dealer Inquires Welcome SEND CHECK OR MONEY ORDER TO Box 866 Lapeer Ml 48446 313 664-3330 Polyhedral Wing-$41 PP Aileron Wmg-$46 PP versatile 1/2 meter wingspan Foam Wing Glider Piloted Paul Wilson crewed Rusty Shaw & Leroy Satterlee Chupersoas designers set Glass record 66 miles Eppler 214 Tersy Edmonds famous pair thermal duration 10 has superior per formance 2 meter events CALLISTO takes over dominate standard class May 1989 49 perfect running mate Vortechs P-51 Zero Check text Infor mation Vortechs P-51 new Zero Composite Aircraft Eng & Supplypo Jeff Fukushima Vortech Models P-51 Mustang Designed fly wherever fly aileron planes Jeffs P-Si another fine ex ample power scale Plc Charlie Moray 8971 AVAILABLE AT AMERICAS FINEST HOBBY SHOPS 69786528 DISTRIBUTED BY sMInhII RED WDYZRZD 7660 So, Gobriel Rood cadero CA 95422 806 466-1717 FROM IIAVEY YSTEMS ir really slick trainers little hassles building taken out box before open birds simple build pretty look small parts well sides tail feathers pre cut ready quick assembly Youll air flying own faster ever expected AT-50 four channel advanced trainer 19-30 engines scale look flies rock stable like pattern bird has wide speed range Has 50 span semi-symme trical airfoil 400 sq area Both kits feature rolled plans step-by step instructions hardware wheel pants formed gear accurately die machine cut selected woods BT-20 three channel trainer 15-25 engines Has fully sheeted flat bottom wing can built optional ailerons 50 span 400 sq area IAVEY675 TOWER LANE YSTEMS WEST CHESTER PA 19380 oRPORATIoN tial interference distant sources number measures can take reduce eliminate skywave interfer ence problems some suggestions 1 Use good quality narrow-band re ceiver conforming 1991 specifications especially important source interference transmitter operating frequency absolutely identical fre quency RC equipment 2 Use PCM radio its inherent abil ity reject interference 3 Avoid flying very high far away transmitter 4 Make sure radio equipment properly tuuled adjusted tactics will provide measure protection hits outside sources may already have noticed interfer ence radio glitches six-meter RC equipment functioned reliably past Cycle #22 could quite pos sibly cause *Contact American Radio Relay League 225 Main Street Newington CT 06111 information about ama teur radio bulletins broadcast what information contain ARRL also excellent source information about am ateur radio electronics theory short wave listening League can help get amateur operators license show build electronic equipment tennas provide easily digested information concerning electrical elec tronics theory Theres brief section current ARRL Handbook about Radio Control equipment principles RC Giant Scale/de Vries Continued page 47 new catalogs Both have added substantially copious lists photo packs well stores Scale drawings Bobs list Scale Model Research 2334 Ticonderoga Costa Mesa CA 92626 $3 Docs Scale Plans & Photo Ser vice 3209 Madison Ave Greensboro NC 27403 also $3 North American modelers Bob notes overseas air mail $250 Doc air mails catalog overseas addi tional $2 postage Emil Neelys latest Ikon NWest PO Box 306 Post Falls ID 83854 Giant Scale ver sion Curtiss Robin Emils done both OX-S Curtiss Challenger-powered ver sions venerable Robin both apparently fly delightfully good stable model yours truly remembers good old days Co met 6-ft-span Free Flight version same prototype Mine flew well Dennymite en gine up front What improvements en gines Emils design should good starting point Giant Scale novice Span 98 flying weight about 14 lb 108 powers Ikon test model An Ikon NWest catalog kits available same address three buckswhich seems popular number month Emil Agostas current project huge Bucker Jungmeister Span 863 Length 745 cowl almost foot diameter theres big bipe future contact Mr Agosta care Dry Ridge Models 59 McCurry Road Weav erville NC 28787 indicates building drawings will run $60 per set should ready column appears final word month about 89 IMAA Rally Giants Les Hard editor High Flight notes years go will take place June 14-18 Odessa TX contact person Robbie Carson 6576 Amber Drive Odessa TX 79762 phone 915 368-5874 Pre-registration landing fee $15 June 1 on-site reg istration will $20 Like other IMAA rallies big un will relaxed fly/gab fest us Gi ant Scalers RC Slope Soaring/Triebes Continued page 49 ment flew again again Nothing seemed help about give up donate wing release tension up walked Jim Slatt Jim Slope masters hes made lot hand-shaped wooden wings told him what happening plane said maybe done poor job wing looked very carefully few minutes stated looked him like very good wing proper washout tips clean Phil lips entry leading edge saw nothing wrong suggested put away bring Out some other day wind blow ing hard fairly straight told him Theres plenty lift out Jim said strength wind can misleading should never judge flight characteristics new plane just days flight went tell once designed wing sure performer selected lowest density balsa out Continued page 161 May1989 157 4 w NEW FEATURES ADDED! Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability * User Selectable Cross Trim Capability * Flap Stick Reversing * Elevator Camber VTR * Automatic Selection High Ail Rudder Mixing Launch Landing Modes * New Feature Fully installed kit Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 AirtmnAsTh Module 75P registered trademarks Ainronics Inc RC Slope Soaring/Triebes Continued page 157 stash contest-grade wood went work done could hardly wait fly sure would best-flying plane hed made date flight day disheartening took wing home hung back garage Six months later dug out gave another try everything thought should moral story said never judge something build flying least five different days bit advice stuck read book loaned friend flies hang gliders some questions began answered book called Flying Conditions Micro-meteorology Pilots Dennis Pagan Its written mainly about hang gliders sailplanes conditions same RC Slope pilots Knowing about aerodynamics important building good Slope plane Knowing about dynamics air equally important Im working private pilot rating things Im learning have lot condition air Understanding different factors volved flying now important cause welfare pilot just air craft major consideration ATRCSTM Advaneed Technology Radio control Sysleni Works standard FM/PPM Receivers AirtronicsTh PCM Receivers Converts Module 75P advanced computerized control system LiftWhat Look part two Ill go little depth about what makes good lift what can cause change study atmospheric phenomena very complicated involves lot strange formulas wont go much detail want best place start Dennis Pagans book mentioned earlier Ill keep simple four main factors involved creat ing lift 1 Air density 2 Entry path slope 3 Wind direction relation slope 4 Size shape slope Air density misunderstood ignored aspect lift dynamics two main influences dictate what density air will betemperature humidity two factors can turn small breeze booming lift take punch Out good strong wind air hot humid its less dense especially its foggy Some people out probably saying wa ter air has thicker wont go long dissertation Ill add water molecules force air mole cules spread apart isnt very complete explanation dont want torn seven-part series Now important everyone Elevator /70y// Camber% I/il/I I/72W/ 0 070 100 Elevator Stick Position % flies place great conditions day find yourself sweating through acrobatic ma neuvers easy few days earlier wind blowing hard right direc tion might because change den sity air So recap Dry cool good Hot wet bad Entry path slope refers what wind has go over its way slopebe water ground objects size wind comes right over water will develop no tur bulence therefore generate smooth lift blows over ground no matter smooth unobstructed will have turbulence associ ated lift makes closer obstruc tions slope worse gets trees houses other objects way turbulence create can felt thousands yards past object spawned An example apparent Long Beachs Bluff Park around 11 am noon wind usually coming straight lift good about 1 pm will switch west just few degrees puts line some offshore oil rigs least 600 yards away lift gets very patchy until switches little west clear oil rigs smoothes out flying good again brings us next factor Wind direction relation slope Tidewater Hobby Enterprises l4U SE41t SU*E*flELDFL32691 904 245-4653 FOR AMERICAN QUALITY FOR SUPERIOR PERFORMANCE FOR PROSUCTI YOU CAN NE PROUD OF QUALITY STANSANSI AT TIDEWATER ARE NECESSARILY HIGH BECAUSE THE ElI ME MANUFACTURE IS TUE PRIER YOU TARE TO THE FUELS COMPLETE LINE AVIALARLE AT QUALITY NORHY SHOPS * 64 SIMISYMITRICAL WING WING AREA * 4 CHANNEL CYCLI 90 4CYCLE LITU WEIGHT ILE I8195 * COMPLETE RUT FOLISHEE ALUM LANSING GEAR * ALL HEWE * 5 TAIL WHEEL * H OZ HAYES FUEL TARE * 3 MAIN WHEELS * UDJOY PERFORMING LOOPS S * SPINS SPINS * * SNAP ROLLS L TURNS RTLESS TOSCN ARE COS * May1989 161 850 Clevis Remover Clevis Remover designed especially sit uations clevis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm clevis tilt right towards thread ed part clevis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Carter St Vidalia LA 71373 316336-5606 dukes ture motor quits wrong time still fuel tank blood pressure goes u sometimes airplanes get bent Unfortunately no simple answer like replace transistor XAC will happy However some systematic exploration problems can usually sorted Out corrected First important understand made plane motor quits unexpectedly 99 times Out 100 either isnt gettingfuel else glow plug has cooled point wont fire Ilameout Aflameaut usually occurs motor has idled back quits upon giving throttle An interruptedfuelJlow usually cause motor quits aefi ill powei nearlyfidlpower Nowfirst lets consider possible causes offuel interruption motor seems run well ground thefint two three minutes theflight quits put airplane climb can almost always assume tank tube has cut hole flopper tube slips over sharp tank tube end thefuel level burned down little bit airplane nosed up hole uncovered motor sucks air dies fuel starvation second possible problem sometimes jlopper tube willfallforward get stuck third cause offuelfiow interruption caused too long tank flopper tube afast pass situation fuel wants fall forward approach enough downward pitch bring flopperforward solution seems work well shorten theflopper tube theflopper tube weight abaut 2/3 way back tank way tank has almost empty before effect becomes evident seem explain problem reasonable assume have dirt some obstruction somewhere fuel line Flameout problems harder put yourfinger First thing tsy new glow plug Veiy often aglow plug will come coated impurities some type will become ineffective new glow plug doesnt correct flameout problem go over low speed mixture adjustment procedure Fox motors have best result enough fuel carburetor crankcase motor run 6 8 seconds after shut off check running motor idle glow plug heater pinch thefuel line just back nipple motor runs 8 seconds want lean low speed needle stops immediately want back out little until run-on time achieved should done high speed needle set rich side After low speed set set high speed accordance airplanes needs restriction exhaust pressure supply will tend flood motor athrottle back situation porticularly large spongy plastic tank solution clear line enlarge pressure fitting hole unusualfor light high powered model have carburetor properly set give throttle take-off motor staggers caused cavitation thefuel line good 40 size motor will produce 6 7 pounds thrust takeoff ifyou have 4 pound airplane no way fuel going continue tofeed carburetoc can sometimes trick situation routing fuel line around thefrone carburetor looping carburetor isa httle fuel line post cavitation point often made mistakes idling motor too rich motor will continue idle very well surprising amount offuel accumulated crankcase However advance throttle motor speeds upi sprayed upper cylinder pretty hard keep aglow plug lit afuel stream spraying iv solution course adjust low speed needle leaner Some lesser likely causes motor quitting have run across asfollows Once Ifound piece offuel tubing sliver inside become peeled off acted like afoot valve would pass fuel slowly thefuel demand became great piece tended flop over close passage Another time customer brought motor just positively would idle run partial throttle Upon disassembling motor wefound owner hopped motor up smoothing out ports radiusing upper lip piston particular case small rodius completely changed scavagingflow byposs spraying glow plug Now another cause motor quitting idle low throttle moisture thefuel takes 8 10 drops water gallon offuel completely destroy idling ability day might have 95% humidity leave lid offfor 1/2 hour what going happen thefuel will evaporate evaporates cools becomes cooler surrounding air reaches dew point Water condenses wall container bath inside outside water outside course doesnt anything water inside becomes mixed thefuel prestoyou have haifa jug offuel wont idle worth aXXXX solution toss get another can Probably best insurance can buy against aflameout use Fox Mirocle Plug Ifyou havent tried should Happy Flying 6L~k Manufacturing Company 5305 Toweon Avenue Fort Smith AR 72901 Phone 501 64-1656 ones easy straightet wind blows sttonget lift wind angle becomes less perpendicular slope less lift Size shape slope Smooth solid air straight no obstructions means zilch has nothing blow against Ya gotta have hill dimensions hill cliff slope bump what puts together self-evident higher up better vertical better dont limit yourself just natural heaps dirt rocks some places might never think place fly Sometimes use Olympic pool building Belmont Shore because its got big flat wail facing wind friend stationed Oklahoma few months used hay barns get lift Watch seagulls other soaring birds see what use free ride try same Well thats hope gives some thing work opens up flying pos sibilities important part observant Watch what happens places fly time youll get know good surfer knows kind wave because fun depends wave similaronly invisible dont know look Slope Soaring News great publication Slope fliers does contain interesting articles like Chucks also has great kit re views fantastic photos informative looks such things building fiberglass fuselages vac uum bagging advanced radio techniques would like have another great source Soaring information one-year subscrip tions available $1595 check payable Charles Morey address Slope Soaring News 2601 E 19th St #29 Signal Hill CA 90804 Vortech Models P-Si Zero Jeff Fukn shima better-known fliers south ern California now producing Slope Scale kits P-Si Zero following what Slope Soaring News say about Jeffs P 51 kit Jeff produces complete P-Si Mustang kit fi berglass fuselage foam cores plans wood fuselage piece other words does assembly two halves feature makes kit easy build fiberglass-fuselage foam-core Slope plane airfoil semisymnhetrical configuration wing sheeted / plywood No doesnt come already sheeted have Jeffs P-Si flies Long Beach model should fly just about anywhere Zero brand-new looks great Jeff has reached agreement Bob Ratzlaff Wilshire Model Center sell kits Contact Wilshire Models 2836 Santa Monlca Blvd Santa Monica CA 90404 ph 213 828-9362 information Rohacell Composite materials becoming commonplace todays Sailplanes exciting useful products come along some time Rohacell Matt Gewain Composite Structures Technology sent some small samples test have say stuff amazing what Matt has say about As aeronautical engineer serious FM competitor last 12 years have tried nu merous construction methods closely watched development composite models Europe Recentiy have settled wing con struction method utilizing Kevlar carbon fiber extensively reinforcement balsa foam core materials However polysty rene polyurethane foams tried lacked com patibility model products resulting excessive weight finlshed addition foam compressed easily weakening model creating problems vacuum molding technlques used applying Kevlar carbon fiber Seeking solution led foam product best Euro pean modelers have using years great resultsRohacell Rohacell compatible current model ing adhesives finishes Plus works very easily much like balsawood times stronger polyurethane polystyrene foams modelers familiar 19 lb per Cu ft density F3B World Champion Raif Decker several noteworthy European fliers utiliz ing Rohacell build top competition machines Reiner Hofsas winner FiB 1985 Free Flight World Championships utilized Rohacell carbon fiber later Espada Wakefield FlB models Thomas Koster has used Rohacell foam several years development all-composite FiC models search perfect core material discovered other modelers also terested trying Rohacell experience along success others has convinced material has tremendous potential types modeling serious competitor ad vantages ease construction weight savings strength far outweigh somewhat higher price compared conventional materials Therefore am making Rohacell available modelers via Composite Structures Technology Dept JR2 3701 Inglewood Ave #268 Ingle wood CA 90287 162 Model Aviation tic /C ad fly Leisure Playboy LanZO Bomber valuable electric RIC lessOfl5• ight Fundamental good electric flight weight airframe Leisures Playboy ters both feature jghtWeight airframes takeoff climb capabilities long flights slow ~ndings n build4n stabilitY easy flying original Playboy Bomber designs started two old timers fly hands off too make perfect RIC trainer imnortant lesson Leisure PlayboY teach tO open up see because theyre electric silent can fly almost hobbY dealer pick up Leisure r kit inexpensive LeiSure 05 some good lessons Also available CST Keviar fiberglass cloth 56 oz 6 oz Safe-T-Poxy mold re lease spray vacuum bag sealant ready step up composite technology products may just what looking Pteranodon Press times have tried enlarge shrink airfoil meet needs resort TLAR Looks About Right conclusion like answer question lotsa times number books available show various plots namely Eppler series usually have ex act size want Now thing past Available Pteranodon Press plots size 300 different air foils Rich Neveln mastermind behind Pter anodon Press supplier great ser vice $2 large SASE Rich will send list available airfoils samples order ing info address Pteranodon Press PO Box 3650 Galdand CA 94609-0650 RC Electrics/Kopski Continued page 51 hundreds flights same motor same 12-cell flight battery pack past summer saw rekindled interest part night flying manifestation wing pods have added orig inal Eureka removable balsa pods rub berbanded place fact have used Astro Challenger well call pods Il luminons Illuminons 25-oz balsa struc tures about 17 long contain two 250 mAh cells switch charge jack two lens assem blies toy flashlights pointing ward aft Connections soldered dinary replaceable flashlight bulbs front Illuminon covered transparent yellow MonoKote rear red transparent addi tion several 18-in-long -in-wide strips chrome MonoKote taped rear II luminon what get Nighttime brilli ance dazzling fun multicolored Illumi nons permit full realization model attitude flightpath total darkness spotlight flashlight lens assemblies up front permit dead head-on landing approaches hori zon trailing chrome streamers provide brilli ant fiery afterburner appearance model flies away flight line short its sheer dazzlement may interested strongly recommend type flying docile models skilled pilots thoroughly fa miliar daylight flight characteristics said docile planes Otherwisego Its whole new fun-filled modeling variantbest done quiet clean Electric power course Eleetrostreak kit Great Planes mentioned last months column Im pass ing along suggestion may inter est anyone building As designed Elec trostreak has fully boxed-in nose section motor mount wing leading edge sides top bottom sheeting glued place same time plans show installing speed control receiver battery area just behind motor Well bit challenge tooshort too-fat fingers got very quickiy frustrat ed whole idea proceeded modiIi structure shown photos Sim ply putI installed good ol fashioned hatch As shown hatch fits down recess formed adding some 42 x Y6-in strip top outer edges fuselage sidesright top installed triangle stock area tri angle stock trimmed back inside edges inside step now formed about /6 wide Some top sheeting glued place shown leading edge location top fuselage front over motor formers latter sheeting extends rearward past rear motor former about /16 simple hatch cover made /32 balsa 4-in-wide /64 ply strip glued down side middle shown cover fits re cess formed described above flush glued-in-place top sheeting small tongue ply extends forward cover toes-in underneath front top sheet small plastic catch shown landing gear strap will installed #2 sheet metal screw center balsa top plate leading edge position will swing over rear edge hatch cover hold down swing away desired lift hatch off Either receiver pack speed control whatever can still attached underside hatch double-sticky Velcro originally intended Im sure modification will make fi nal installation subsequent maintenance much pleasant us such fin gers Iand everyone else too Putting alternative general wayI cant imagine Electric having access hatch Continued page 166 May1989 163
Edition: Model Aviation - 1989/05
Page Numbers: 48, 49, 157, 161, 162, 163
INTERNATIONAL RC Scale Soaring Fun-Fly coming up recently received update Wil Byers years fun-fly Heres what say weekend Memorial Day 1988 weekend first-ever National RC Scale Soar ing Fun-Fly Soaring Social event marked outstanding enthusiasm tremen dous support Soaring community As result event will probably go down Soar ing annuals genuine success therefore Tn-City Soarers feel worthy repeating 1989 Now attended enjoyed yourself want invite come back share event us again however able attend last year think event kind Soaring happening want part heartily welcome come TnCities participate International RC Scale Soaring Fun-Fly May 26 27 28 1989 goal years event attract entrants over world well US Canada successful endeavor will have opportunity share other fine craftsmanship flying skills participation vital end Whether its because youre meticulous crafts man talented flier just all-around nice guy would absolutely miss able attend want Think about much fun would have regis ter great Soaring experience will again using Clover Island Mo tor Inn fun-fly headquarters hotel has greatly improved through complete remod eling management hospitable last year restaurant has added new menu view rooms still just great ever Columbia River flowing just feet away room beautiful desert mountains distance Tn-Cities Soarers genuinely hope registering right now will soon get chance meet see models action Make note re ceive registration will enter event about month prior event will send information packet packet will include maps telephone numbers site location directions Additionally sug gest register early make room res ervation making reservations hotel please indicate Soaring group course get Glider done order Lastly Tri-Cities has picked site 1989 AMA National Championships year will include AMA sanctioned one-day Slope race feel testa ment slopes second provided wind cooperates plans will rewarded fun-fly enjoyable times Soaring life Viking F3F Slope Race event will held Denmark June 1 1989 opportunity see some best Slope fliers world received letter Dale Willoughby will competitors US Dale will team manager/competitor anyone dwel ling east Mississippi River bound Denmark plan attending event get touch Dale soon possible ad dress PO Box 927 Jacksonville NC 285410927 Lift following two-part article ap peared two recent issues Slope Soaring News Written Chuck Korolden discusses what lift find LiftWhat What stupid question Lift Its what live its Just because wind blowing up slope good clip doesnt mean lift good fact wind velocity ladder impor tance several rungs below other factors present readily obvious True Maniah other factors come moot function gether whole called life an lift bout Freudian slip keyboard Lift combination wind velocity Left Members White Sheet Radio Fiying Ciub recent ciub Scaie competition WSRFC premier Siope ciubs UK Obviously specallze Scaie modeiing Right David Brigga waIts judging circie gorgeous quarter-scaie Twin Acoro Southwest main bowi Slope background site has plenty room iand glider Photos Sean Waibank 48 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisier Ct Saratoga CA 95070 Doug Hertzog copilot Troy gets ready aunch Dougs Siihouette Silhouette new kit being produced Doug come future articie Photo Charile Morey air density As long air going up faster plane goes down stay up Soar ing performance has quality air speed its rising two forces optimum planes fly well things arent up snuff best design becomes dog didnt know factors existed until started build own planes day flew thought should next day someone taken flubber out took place under aimost same wind condi tions As learned later wind same air very different day test flying new wing shaped Jack Chambers JC-14 airfoil Something wasnt right tried adding weight taking out made adjustment after adjustContinued page 157 VACUUM BAG UM BAG UM BAG UM BAG SUCKER-KIT manually controlled vacuum bag system makes lay up process combination foam & skins trouble free fast first time SUCKER-KIT$5995 VHS Show & Tell Video$3995 Add $400 shipping & handling MI residents add 40/a sales tax Send $100 SASE product list samples real wood veneer skins Product List Includes Gapless Arrow Shaft Hinges Carbon Tow Mylar Sheet High-Tech items Dealer Inquires Welcome SEND CHECK OR MONEY ORDER TO Box 866 Lapeer Ml 48446 313 664-3330 Polyhedral Wing-$41 PP Aileron Wmg-$46 PP versatile 1/2 meter wingspan Foam Wing Glider Piloted Paul Wilson crewed Rusty Shaw & Leroy Satterlee Chupersoas designers set Glass record 66 miles Eppler 214 Tersy Edmonds famous pair thermal duration 10 has superior per formance 2 meter events CALLISTO takes over dominate standard class May 1989 49 perfect running mate Vortechs P-51 Zero Check text Infor mation Vortechs P-51 new Zero Composite Aircraft Eng & Supplypo Jeff Fukushima Vortech Models P-51 Mustang Designed fly wherever fly aileron planes Jeffs P-Si another fine ex ample power scale Plc Charlie Moray 8971 AVAILABLE AT AMERICAS FINEST HOBBY SHOPS 69786528 DISTRIBUTED BY sMInhII RED WDYZRZD 7660 So, Gobriel Rood cadero CA 95422 806 466-1717 FROM IIAVEY YSTEMS ir really slick trainers little hassles building taken out box before open birds simple build pretty look small parts well sides tail feathers pre cut ready quick assembly Youll air flying own faster ever expected AT-50 four channel advanced trainer 19-30 engines scale look flies rock stable like pattern bird has wide speed range Has 50 span semi-symme trical airfoil 400 sq area Both kits feature rolled plans step-by step instructions hardware wheel pants formed gear accurately die machine cut selected woods BT-20 three channel trainer 15-25 engines Has fully sheeted flat bottom wing can built optional ailerons 50 span 400 sq area IAVEY675 TOWER LANE YSTEMS WEST CHESTER PA 19380 oRPORATIoN tial interference distant sources number measures can take reduce eliminate skywave interfer ence problems some suggestions 1 Use good quality narrow-band re ceiver conforming 1991 specifications especially important source interference transmitter operating frequency absolutely identical fre quency RC equipment 2 Use PCM radio its inherent abil ity reject interference 3 Avoid flying very high far away transmitter 4 Make sure radio equipment properly tuuled adjusted tactics will provide measure protection hits outside sources may already have noticed interfer ence radio glitches six-meter RC equipment functioned reliably past Cycle #22 could quite pos sibly cause *Contact American Radio Relay League 225 Main Street Newington CT 06111 information about ama teur radio bulletins broadcast what information contain ARRL also excellent source information about am ateur radio electronics theory short wave listening League can help get amateur operators license show build electronic equipment tennas provide easily digested information concerning electrical elec tronics theory Theres brief section current ARRL Handbook about Radio Control equipment principles RC Giant Scale/de Vries Continued page 47 new catalogs Both have added substantially copious lists photo packs well stores Scale drawings Bobs list Scale Model Research 2334 Ticonderoga Costa Mesa CA 92626 $3 Docs Scale Plans & Photo Ser vice 3209 Madison Ave Greensboro NC 27403 also $3 North American modelers Bob notes overseas air mail $250 Doc air mails catalog overseas addi tional $2 postage Emil Neelys latest Ikon NWest PO Box 306 Post Falls ID 83854 Giant Scale ver sion Curtiss Robin Emils done both OX-S Curtiss Challenger-powered ver sions venerable Robin both apparently fly delightfully good stable model yours truly remembers good old days Co met 6-ft-span Free Flight version same prototype Mine flew well Dennymite en gine up front What improvements en gines Emils design should good starting point Giant Scale novice Span 98 flying weight about 14 lb 108 powers Ikon test model An Ikon NWest catalog kits available same address three buckswhich seems popular number month Emil Agostas current project huge Bucker Jungmeister Span 863 Length 745 cowl almost foot diameter theres big bipe future contact Mr Agosta care Dry Ridge Models 59 McCurry Road Weav erville NC 28787 indicates building drawings will run $60 per set should ready column appears final word month about 89 IMAA Rally Giants Les Hard editor High Flight notes years go will take place June 14-18 Odessa TX contact person Robbie Carson 6576 Amber Drive Odessa TX 79762 phone 915 368-5874 Pre-registration landing fee $15 June 1 on-site reg istration will $20 Like other IMAA rallies big un will relaxed fly/gab fest us Gi ant Scalers RC Slope Soaring/Triebes Continued page 49 ment flew again again Nothing seemed help about give up donate wing release tension up walked Jim Slatt Jim Slope masters hes made lot hand-shaped wooden wings told him what happening plane said maybe done poor job wing looked very carefully few minutes stated looked him like very good wing proper washout tips clean Phil lips entry leading edge saw nothing wrong suggested put away bring Out some other day wind blow ing hard fairly straight told him Theres plenty lift out Jim said strength wind can misleading should never judge flight characteristics new plane just days flight went tell once designed wing sure performer selected lowest density balsa out Continued page 161 May1989 157 4 w NEW FEATURES ADDED! Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability * User Selectable Cross Trim Capability * Flap Stick Reversing * Elevator Camber VTR * Automatic Selection High Ail Rudder Mixing Launch Landing Modes * New Feature Fully installed kit Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 AirtmnAsTh Module 75P registered trademarks Ainronics Inc RC Slope Soaring/Triebes Continued page 157 stash contest-grade wood went work done could hardly wait fly sure would best-flying plane hed made date flight day disheartening took wing home hung back garage Six months later dug out gave another try everything thought should moral story said never judge something build flying least five different days bit advice stuck read book loaned friend flies hang gliders some questions began answered book called Flying Conditions Micro-meteorology Pilots Dennis Pagan Its written mainly about hang gliders sailplanes conditions same RC Slope pilots Knowing about aerodynamics important building good Slope plane Knowing about dynamics air equally important Im working private pilot rating things Im learning have lot condition air Understanding different factors volved flying now important cause welfare pilot just air craft major consideration ATRCSTM Advaneed Technology Radio control Sysleni Works standard FM/PPM Receivers AirtronicsTh PCM Receivers Converts Module 75P advanced computerized control system LiftWhat Look part two Ill go little depth about what makes good lift what can cause change study atmospheric phenomena very complicated involves lot strange formulas wont go much detail want best place start Dennis Pagans book mentioned earlier Ill keep simple four main factors involved creat ing lift 1 Air density 2 Entry path slope 3 Wind direction relation slope 4 Size shape slope Air density misunderstood ignored aspect lift dynamics two main influences dictate what density air will betemperature humidity two factors can turn small breeze booming lift take punch Out good strong wind air hot humid its less dense especially its foggy Some people out probably saying wa ter air has thicker wont go long dissertation Ill add water molecules force air mole cules spread apart isnt very complete explanation dont want torn seven-part series Now important everyone Elevator /70y// Camber% I/il/I I/72W/ 0 070 100 Elevator Stick Position % flies place great conditions day find yourself sweating through acrobatic ma neuvers easy few days earlier wind blowing hard right direc tion might because change den sity air So recap Dry cool good Hot wet bad Entry path slope refers what wind has go over its way slopebe water ground objects size wind comes right over water will develop no tur bulence therefore generate smooth lift blows over ground no matter smooth unobstructed will have turbulence associ ated lift makes closer obstruc tions slope worse gets trees houses other objects way turbulence create can felt thousands yards past object spawned An example apparent Long Beachs Bluff Park around 11 am noon wind usually coming straight lift good about 1 pm will switch west just few degrees puts line some offshore oil rigs least 600 yards away lift gets very patchy until switches little west clear oil rigs smoothes out flying good again brings us next factor Wind direction relation slope Tidewater Hobby Enterprises l4U SE41t SU*E*flELDFL32691 904 245-4653 FOR AMERICAN QUALITY FOR SUPERIOR PERFORMANCE FOR PROSUCTI YOU CAN NE PROUD OF QUALITY STANSANSI AT TIDEWATER ARE NECESSARILY HIGH BECAUSE THE ElI ME MANUFACTURE IS TUE PRIER YOU TARE TO THE FUELS COMPLETE LINE AVIALARLE AT QUALITY NORHY SHOPS * 64 SIMISYMITRICAL WING WING AREA * 4 CHANNEL CYCLI 90 4CYCLE LITU WEIGHT ILE I8195 * COMPLETE RUT FOLISHEE ALUM LANSING GEAR * ALL HEWE * 5 TAIL WHEEL * H OZ HAYES FUEL TARE * 3 MAIN WHEELS * UDJOY PERFORMING LOOPS S * SPINS SPINS * * SNAP ROLLS L TURNS RTLESS TOSCN ARE COS * May1989 161 850 Clevis Remover Clevis Remover designed especially sit uations clevis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm clevis tilt right towards thread ed part clevis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Carter St Vidalia LA 71373 316336-5606 dukes ture motor quits wrong time still fuel tank blood pressure goes u sometimes airplanes get bent Unfortunately no simple answer like replace transistor XAC will happy However some systematic exploration problems can usually sorted Out corrected First important understand made plane motor quits unexpectedly 99 times Out 100 either isnt gettingfuel else glow plug has cooled point wont fire Ilameout Aflameaut usually occurs motor has idled back quits upon giving throttle An interruptedfuelJlow usually cause motor quits aefi ill powei nearlyfidlpower Nowfirst lets consider possible causes offuel interruption motor seems run well ground thefint two three minutes theflight quits put airplane climb can almost always assume tank tube has cut hole flopper tube slips over sharp tank tube end thefuel level burned down little bit airplane nosed up hole uncovered motor sucks air dies fuel starvation second possible problem sometimes jlopper tube willfallforward get stuck third cause offuelfiow interruption caused too long tank flopper tube afast pass situation fuel wants fall forward approach enough downward pitch bring flopperforward solution seems work well shorten theflopper tube theflopper tube weight abaut 2/3 way back tank way tank has almost empty before effect becomes evident seem explain problem reasonable assume have dirt some obstruction somewhere fuel line Flameout problems harder put yourfinger First thing tsy new glow plug Veiy often aglow plug will come coated impurities some type will become ineffective new glow plug doesnt correct flameout problem go over low speed mixture adjustment procedure Fox motors have best result enough fuel carburetor crankcase motor run 6 8 seconds after shut off check running motor idle glow plug heater pinch thefuel line just back nipple motor runs 8 seconds want lean low speed needle stops immediately want back out little until run-on time achieved should done high speed needle set rich side After low speed set set high speed accordance airplanes needs restriction exhaust pressure supply will tend flood motor athrottle back situation porticularly large spongy plastic tank solution clear line enlarge pressure fitting hole unusualfor light high powered model have carburetor properly set give throttle take-off motor staggers caused cavitation thefuel line good 40 size motor will produce 6 7 pounds thrust takeoff ifyou have 4 pound airplane no way fuel going continue tofeed carburetoc can sometimes trick situation routing fuel line around thefrone carburetor looping carburetor isa httle fuel line post cavitation point often made mistakes idling motor too rich motor will continue idle very well surprising amount offuel accumulated crankcase However advance throttle motor speeds upi sprayed upper cylinder pretty hard keep aglow plug lit afuel stream spraying iv solution course adjust low speed needle leaner Some lesser likely causes motor quitting have run across asfollows Once Ifound piece offuel tubing sliver inside become peeled off acted like afoot valve would pass fuel slowly thefuel demand became great piece tended flop over close passage Another time customer brought motor just positively would idle run partial throttle Upon disassembling motor wefound owner hopped motor up smoothing out ports radiusing upper lip piston particular case small rodius completely changed scavagingflow byposs spraying glow plug Now another cause motor quitting idle low throttle moisture thefuel takes 8 10 drops water gallon offuel completely destroy idling ability day might have 95% humidity leave lid offfor 1/2 hour what going happen thefuel will evaporate evaporates cools becomes cooler surrounding air reaches dew point Water condenses wall container bath inside outside water outside course doesnt anything water inside becomes mixed thefuel prestoyou have haifa jug offuel wont idle worth aXXXX solution toss get another can Probably best insurance can buy against aflameout use Fox Mirocle Plug Ifyou havent tried should Happy Flying 6L~k Manufacturing Company 5305 Toweon Avenue Fort Smith AR 72901 Phone 501 64-1656 ones easy straightet wind blows sttonget lift wind angle becomes less perpendicular slope less lift Size shape slope Smooth solid air straight no obstructions means zilch has nothing blow against Ya gotta have hill dimensions hill cliff slope bump what puts together self-evident higher up better vertical better dont limit yourself just natural heaps dirt rocks some places might never think place fly Sometimes use Olympic pool building Belmont Shore because its got big flat wail facing wind friend stationed Oklahoma few months used hay barns get lift Watch seagulls other soaring birds see what use free ride try same Well thats hope gives some thing work opens up flying pos sibilities important part observant Watch what happens places fly time youll get know good surfer knows kind wave because fun depends wave similaronly invisible dont know look Slope Soaring News great publication Slope fliers does contain interesting articles like Chucks also has great kit re views fantastic photos informative looks such things building fiberglass fuselages vac uum bagging advanced radio techniques would like have another great source Soaring information one-year subscrip tions available $1595 check payable Charles Morey address Slope Soaring News 2601 E 19th St #29 Signal Hill CA 90804 Vortech Models P-Si Zero Jeff Fukn shima better-known fliers south ern California now producing Slope Scale kits P-Si Zero following what Slope Soaring News say about Jeffs P 51 kit Jeff produces complete P-Si Mustang kit fi berglass fuselage foam cores plans wood fuselage piece other words does assembly two halves feature makes kit easy build fiberglass-fuselage foam-core Slope plane airfoil semisymnhetrical configuration wing sheeted / plywood No doesnt come already sheeted have Jeffs P-Si flies Long Beach model should fly just about anywhere Zero brand-new looks great Jeff has reached agreement Bob Ratzlaff Wilshire Model Center sell kits Contact Wilshire Models 2836 Santa Monlca Blvd Santa Monica CA 90404 ph 213 828-9362 information Rohacell Composite materials becoming commonplace todays Sailplanes exciting useful products come along some time Rohacell Matt Gewain Composite Structures Technology sent some small samples test have say stuff amazing what Matt has say about As aeronautical engineer serious FM competitor last 12 years have tried nu merous construction methods closely watched development composite models Europe Recentiy have settled wing con struction method utilizing Kevlar carbon fiber extensively reinforcement balsa foam core materials However polysty rene polyurethane foams tried lacked com patibility model products resulting excessive weight finlshed addition foam compressed easily weakening model creating problems vacuum molding technlques used applying Kevlar carbon fiber Seeking solution led foam product best Euro pean modelers have using years great resultsRohacell Rohacell compatible current model ing adhesives finishes Plus works very easily much like balsawood times stronger polyurethane polystyrene foams modelers familiar 19 lb per Cu ft density F3B World Champion Raif Decker several noteworthy European fliers utiliz ing Rohacell build top competition machines Reiner Hofsas winner FiB 1985 Free Flight World Championships utilized Rohacell carbon fiber later Espada Wakefield FlB models Thomas Koster has used Rohacell foam several years development all-composite FiC models search perfect core material discovered other modelers also terested trying Rohacell experience along success others has convinced material has tremendous potential types modeling serious competitor ad vantages ease construction weight savings strength far outweigh somewhat higher price compared conventional materials Therefore am making Rohacell available modelers via Composite Structures Technology Dept JR2 3701 Inglewood Ave #268 Ingle wood CA 90287 162 Model Aviation tic /C ad fly Leisure Playboy LanZO Bomber valuable electric RIC lessOfl5• ight Fundamental good electric flight weight airframe Leisures Playboy ters both feature jghtWeight airframes takeoff climb capabilities long flights slow ~ndings n build4n stabilitY easy flying original Playboy Bomber designs started two old timers fly hands off too make perfect RIC trainer imnortant lesson Leisure PlayboY teach tO open up see because theyre electric silent can fly almost hobbY dealer pick up Leisure r kit inexpensive LeiSure 05 some good lessons Also available CST Keviar fiberglass cloth 56 oz 6 oz Safe-T-Poxy mold re lease spray vacuum bag sealant ready step up composite technology products may just what looking Pteranodon Press times have tried enlarge shrink airfoil meet needs resort TLAR Looks About Right conclusion like answer question lotsa times number books available show various plots namely Eppler series usually have ex act size want Now thing past Available Pteranodon Press plots size 300 different air foils Rich Neveln mastermind behind Pter anodon Press supplier great ser vice $2 large SASE Rich will send list available airfoils samples order ing info address Pteranodon Press PO Box 3650 Galdand CA 94609-0650 RC Electrics/Kopski Continued page 51 hundreds flights same motor same 12-cell flight battery pack past summer saw rekindled interest part night flying manifestation wing pods have added orig inal Eureka removable balsa pods rub berbanded place fact have used Astro Challenger well call pods Il luminons Illuminons 25-oz balsa struc tures about 17 long contain two 250 mAh cells switch charge jack two lens assem blies toy flashlights pointing ward aft Connections soldered dinary replaceable flashlight bulbs front Illuminon covered transparent yellow MonoKote rear red transparent addi tion several 18-in-long -in-wide strips chrome MonoKote taped rear II luminon what get Nighttime brilli ance dazzling fun multicolored Illumi nons permit full realization model attitude flightpath total darkness spotlight flashlight lens assemblies up front permit dead head-on landing approaches hori zon trailing chrome streamers provide brilli ant fiery afterburner appearance model flies away flight line short its sheer dazzlement may interested strongly recommend type flying docile models skilled pilots thoroughly fa miliar daylight flight characteristics said docile planes Otherwisego Its whole new fun-filled modeling variantbest done quiet clean Electric power course Eleetrostreak kit Great Planes mentioned last months column Im pass ing along suggestion may inter est anyone building As designed Elec trostreak has fully boxed-in nose section motor mount wing leading edge sides top bottom sheeting glued place same time plans show installing speed control receiver battery area just behind motor Well bit challenge tooshort too-fat fingers got very quickiy frustrat ed whole idea proceeded modiIi structure shown photos Sim ply putI installed good ol fashioned hatch As shown hatch fits down recess formed adding some 42 x Y6-in strip top outer edges fuselage sidesright top installed triangle stock area tri angle stock trimmed back inside edges inside step now formed about /6 wide Some top sheeting glued place shown leading edge location top fuselage front over motor formers latter sheeting extends rearward past rear motor former about /16 simple hatch cover made /32 balsa 4-in-wide /64 ply strip glued down side middle shown cover fits re cess formed described above flush glued-in-place top sheeting small tongue ply extends forward cover toes-in underneath front top sheet small plastic catch shown landing gear strap will installed #2 sheet metal screw center balsa top plate leading edge position will swing over rear edge hatch cover hold down swing away desired lift hatch off Either receiver pack speed control whatever can still attached underside hatch double-sticky Velcro originally intended Im sure modification will make fi nal installation subsequent maintenance much pleasant us such fin gers Iand everyone else too Putting alternative general wayI cant imagine Electric having access hatch Continued page 166 May1989 163
Edition: Model Aviation - 1989/05
Page Numbers: 48, 49, 157, 161, 162, 163
INTERNATIONAL RC Scale Soaring Fun-Fly coming up recently received update Wil Byers years fun-fly Heres what say weekend Memorial Day 1988 weekend first-ever National RC Scale Soar ing Fun-Fly Soaring Social event marked outstanding enthusiasm tremen dous support Soaring community As result event will probably go down Soar ing annuals genuine success therefore Tn-City Soarers feel worthy repeating 1989 Now attended enjoyed yourself want invite come back share event us again however able attend last year think event kind Soaring happening want part heartily welcome come TnCities participate International RC Scale Soaring Fun-Fly May 26 27 28 1989 goal years event attract entrants over world well US Canada successful endeavor will have opportunity share other fine craftsmanship flying skills participation vital end Whether its because youre meticulous crafts man talented flier just all-around nice guy would absolutely miss able attend want Think about much fun would have regis ter great Soaring experience will again using Clover Island Mo tor Inn fun-fly headquarters hotel has greatly improved through complete remod eling management hospitable last year restaurant has added new menu view rooms still just great ever Columbia River flowing just feet away room beautiful desert mountains distance Tn-Cities Soarers genuinely hope registering right now will soon get chance meet see models action Make note re ceive registration will enter event about month prior event will send information packet packet will include maps telephone numbers site location directions Additionally sug gest register early make room res ervation making reservations hotel please indicate Soaring group course get Glider done order Lastly Tri-Cities has picked site 1989 AMA National Championships year will include AMA sanctioned one-day Slope race feel testa ment slopes second provided wind cooperates plans will rewarded fun-fly enjoyable times Soaring life Viking F3F Slope Race event will held Denmark June 1 1989 opportunity see some best Slope fliers world received letter Dale Willoughby will competitors US Dale will team manager/competitor anyone dwel ling east Mississippi River bound Denmark plan attending event get touch Dale soon possible ad dress PO Box 927 Jacksonville NC 285410927 Lift following two-part article ap peared two recent issues Slope Soaring News Written Chuck Korolden discusses what lift find LiftWhat What stupid question Lift Its what live its Just because wind blowing up slope good clip doesnt mean lift good fact wind velocity ladder impor tance several rungs below other factors present readily obvious True Maniah other factors come moot function gether whole called life an lift bout Freudian slip keyboard Lift combination wind velocity Left Members White Sheet Radio Fiying Ciub recent ciub Scaie competition WSRFC premier Siope ciubs UK Obviously specallze Scaie modeiing Right David Brigga waIts judging circie gorgeous quarter-scaie Twin Acoro Southwest main bowi Slope background site has plenty room iand glider Photos Sean Waibank 48 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisier Ct Saratoga CA 95070 Doug Hertzog copilot Troy gets ready aunch Dougs Siihouette Silhouette new kit being produced Doug come future articie Photo Charile Morey air density As long air going up faster plane goes down stay up Soar ing performance has quality air speed its rising two forces optimum planes fly well things arent up snuff best design becomes dog didnt know factors existed until started build own planes day flew thought should next day someone taken flubber out took place under aimost same wind condi tions As learned later wind same air very different day test flying new wing shaped Jack Chambers JC-14 airfoil Something wasnt right tried adding weight taking out made adjustment after adjustContinued page 157 VACUUM BAG UM BAG UM BAG UM BAG SUCKER-KIT manually controlled vacuum bag system makes lay up process combination foam & skins trouble free fast first time SUCKER-KIT$5995 VHS Show & Tell Video$3995 Add $400 shipping & handling MI residents add 40/a sales tax Send $100 SASE product list samples real wood veneer skins Product List Includes Gapless Arrow Shaft Hinges Carbon Tow Mylar Sheet High-Tech items Dealer Inquires Welcome SEND CHECK OR MONEY ORDER TO Box 866 Lapeer Ml 48446 313 664-3330 Polyhedral Wing-$41 PP Aileron Wmg-$46 PP versatile 1/2 meter wingspan Foam Wing Glider Piloted Paul Wilson crewed Rusty Shaw & Leroy Satterlee Chupersoas designers set Glass record 66 miles Eppler 214 Tersy Edmonds famous pair thermal duration 10 has superior per formance 2 meter events CALLISTO takes over dominate standard class May 1989 49 perfect running mate Vortechs P-51 Zero Check text Infor mation Vortechs P-51 new Zero Composite Aircraft Eng & Supplypo Jeff Fukushima Vortech Models P-51 Mustang Designed fly wherever fly aileron planes Jeffs P-Si another fine ex ample power scale Plc Charlie Moray 8971 AVAILABLE AT AMERICAS FINEST HOBBY SHOPS 69786528 DISTRIBUTED BY sMInhII RED WDYZRZD 7660 So, Gobriel Rood cadero CA 95422 806 466-1717 FROM IIAVEY YSTEMS ir really slick trainers little hassles building taken out box before open birds simple build pretty look small parts well sides tail feathers pre cut ready quick assembly Youll air flying own faster ever expected AT-50 four channel advanced trainer 19-30 engines scale look flies rock stable like pattern bird has wide speed range Has 50 span semi-symme trical airfoil 400 sq area Both kits feature rolled plans step-by step instructions hardware wheel pants formed gear accurately die machine cut selected woods BT-20 three channel trainer 15-25 engines Has fully sheeted flat bottom wing can built optional ailerons 50 span 400 sq area IAVEY675 TOWER LANE YSTEMS WEST CHESTER PA 19380 oRPORATIoN tial interference distant sources number measures can take reduce eliminate skywave interfer ence problems some suggestions 1 Use good quality narrow-band re ceiver conforming 1991 specifications especially important source interference transmitter operating frequency absolutely identical fre quency RC equipment 2 Use PCM radio its inherent abil ity reject interference 3 Avoid flying very high far away transmitter 4 Make sure radio equipment properly tuuled adjusted tactics will provide measure protection hits outside sources may already have noticed interfer ence radio glitches six-meter RC equipment functioned reliably past Cycle #22 could quite pos sibly cause *Contact American Radio Relay League 225 Main Street Newington CT 06111 information about ama teur radio bulletins broadcast what information contain ARRL also excellent source information about am ateur radio electronics theory short wave listening League can help get amateur operators license show build electronic equipment tennas provide easily digested information concerning electrical elec tronics theory Theres brief section current ARRL Handbook about Radio Control equipment principles RC Giant Scale/de Vries Continued page 47 new catalogs Both have added substantially copious lists photo packs well stores Scale drawings Bobs list Scale Model Research 2334 Ticonderoga Costa Mesa CA 92626 $3 Docs Scale Plans & Photo Ser vice 3209 Madison Ave Greensboro NC 27403 also $3 North American modelers Bob notes overseas air mail $250 Doc air mails catalog overseas addi tional $2 postage Emil Neelys latest Ikon NWest PO Box 306 Post Falls ID 83854 Giant Scale ver sion Curtiss Robin Emils done both OX-S Curtiss Challenger-powered ver sions venerable Robin both apparently fly delightfully good stable model yours truly remembers good old days Co met 6-ft-span Free Flight version same prototype Mine flew well Dennymite en gine up front What improvements en gines Emils design should good starting point Giant Scale novice Span 98 flying weight about 14 lb 108 powers Ikon test model An Ikon NWest catalog kits available same address three buckswhich seems popular number month Emil Agostas current project huge Bucker Jungmeister Span 863 Length 745 cowl almost foot diameter theres big bipe future contact Mr Agosta care Dry Ridge Models 59 McCurry Road Weav erville NC 28787 indicates building drawings will run $60 per set should ready column appears final word month about 89 IMAA Rally Giants Les Hard editor High Flight notes years go will take place June 14-18 Odessa TX contact person Robbie Carson 6576 Amber Drive Odessa TX 79762 phone 915 368-5874 Pre-registration landing fee $15 June 1 on-site reg istration will $20 Like other IMAA rallies big un will relaxed fly/gab fest us Gi ant Scalers RC Slope Soaring/Triebes Continued page 49 ment flew again again Nothing seemed help about give up donate wing release tension up walked Jim Slatt Jim Slope masters hes made lot hand-shaped wooden wings told him what happening plane said maybe done poor job wing looked very carefully few minutes stated looked him like very good wing proper washout tips clean Phil lips entry leading edge saw nothing wrong suggested put away bring Out some other day wind blow ing hard fairly straight told him Theres plenty lift out Jim said strength wind can misleading should never judge flight characteristics new plane just days flight went tell once designed wing sure performer selected lowest density balsa out Continued page 161 May1989 157 4 w NEW FEATURES ADDED! Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability * User Selectable Cross Trim Capability * Flap Stick Reversing * Elevator Camber VTR * Automatic Selection High Ail Rudder Mixing Launch Landing Modes * New Feature Fully installed kit Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 AirtmnAsTh Module 75P registered trademarks Ainronics Inc RC Slope Soaring/Triebes Continued page 157 stash contest-grade wood went work done could hardly wait fly sure would best-flying plane hed made date flight day disheartening took wing home hung back garage Six months later dug out gave another try everything thought should moral story said never judge something build flying least five different days bit advice stuck read book loaned friend flies hang gliders some questions began answered book called Flying Conditions Micro-meteorology Pilots Dennis Pagan Its written mainly about hang gliders sailplanes conditions same RC Slope pilots Knowing about aerodynamics important building good Slope plane Knowing about dynamics air equally important Im working private pilot rating things Im learning have lot condition air Understanding different factors volved flying now important cause welfare pilot just air craft major consideration ATRCSTM Advaneed Technology Radio control Sysleni Works standard FM/PPM Receivers AirtronicsTh PCM Receivers Converts Module 75P advanced computerized control system LiftWhat Look part two Ill go little depth about what makes good lift what can cause change study atmospheric phenomena very complicated involves lot strange formulas wont go much detail want best place start Dennis Pagans book mentioned earlier Ill keep simple four main factors involved creat ing lift 1 Air density 2 Entry path slope 3 Wind direction relation slope 4 Size shape slope Air density misunderstood ignored aspect lift dynamics two main influences dictate what density air will betemperature humidity two factors can turn small breeze booming lift take punch Out good strong wind air hot humid its less dense especially its foggy Some people out probably saying wa ter air has thicker wont go long dissertation Ill add water molecules force air mole cules spread apart isnt very complete explanation dont want torn seven-part series Now important everyone Elevator /70y// Camber% I/il/I I/72W/ 0 070 100 Elevator Stick Position % flies place great conditions day find yourself sweating through acrobatic ma neuvers easy few days earlier wind blowing hard right direc tion might because change den sity air So recap Dry cool good Hot wet bad Entry path slope refers what wind has go over its way slopebe water ground objects size wind comes right over water will develop no tur bulence therefore generate smooth lift blows over ground no matter smooth unobstructed will have turbulence associ ated lift makes closer obstruc tions slope worse gets trees houses other objects way turbulence create can felt thousands yards past object spawned An example apparent Long Beachs Bluff Park around 11 am noon wind usually coming straight lift good about 1 pm will switch west just few degrees puts line some offshore oil rigs least 600 yards away lift gets very patchy until switches little west clear oil rigs smoothes out flying good again brings us next factor Wind direction relation slope Tidewater Hobby Enterprises l4U SE41t SU*E*flELDFL32691 904 245-4653 FOR AMERICAN QUALITY FOR SUPERIOR PERFORMANCE FOR PROSUCTI YOU CAN NE PROUD OF QUALITY STANSANSI AT TIDEWATER ARE NECESSARILY HIGH BECAUSE THE ElI ME MANUFACTURE IS TUE PRIER YOU TARE TO THE FUELS COMPLETE LINE AVIALARLE AT QUALITY NORHY SHOPS * 64 SIMISYMITRICAL WING WING AREA * 4 CHANNEL CYCLI 90 4CYCLE LITU WEIGHT ILE I8195 * COMPLETE RUT FOLISHEE ALUM LANSING GEAR * ALL HEWE * 5 TAIL WHEEL * H OZ HAYES FUEL TARE * 3 MAIN WHEELS * UDJOY PERFORMING LOOPS S * SPINS SPINS * * SNAP ROLLS L TURNS RTLESS TOSCN ARE COS * May1989 161 850 Clevis Remover Clevis Remover designed especially sit uations clevis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm clevis tilt right towards thread ed part clevis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Carter St Vidalia LA 71373 316336-5606 dukes ture motor quits wrong time still fuel tank blood pressure goes u sometimes airplanes get bent Unfortunately no simple answer like replace transistor XAC will happy However some systematic exploration problems can usually sorted Out corrected First important understand made plane motor quits unexpectedly 99 times Out 100 either isnt gettingfuel else glow plug has cooled point wont fire Ilameout Aflameaut usually occurs motor has idled back quits upon giving throttle An interruptedfuelJlow usually cause motor quits aefi ill powei nearlyfidlpower Nowfirst lets consider possible causes offuel interruption motor seems run well ground thefint two three minutes theflight quits put airplane climb can almost always assume tank tube has cut hole flopper tube slips over sharp tank tube end thefuel level burned down little bit airplane nosed up hole uncovered motor sucks air dies fuel starvation second possible problem sometimes jlopper tube willfallforward get stuck third cause offuelfiow interruption caused too long tank flopper tube afast pass situation fuel wants fall forward approach enough downward pitch bring flopperforward solution seems work well shorten theflopper tube theflopper tube weight abaut 2/3 way back tank way tank has almost empty before effect becomes evident seem explain problem reasonable assume have dirt some obstruction somewhere fuel line Flameout problems harder put yourfinger First thing tsy new glow plug Veiy often aglow plug will come coated impurities some type will become ineffective new glow plug doesnt correct flameout problem go over low speed mixture adjustment procedure Fox motors have best result enough fuel carburetor crankcase motor run 6 8 seconds after shut off check running motor idle glow plug heater pinch thefuel line just back nipple motor runs 8 seconds want lean low speed needle stops immediately want back out little until run-on time achieved should done high speed needle set rich side After low speed set set high speed accordance airplanes needs restriction exhaust pressure supply will tend flood motor athrottle back situation porticularly large spongy plastic tank solution clear line enlarge pressure fitting hole unusualfor light high powered model have carburetor properly set give throttle take-off motor staggers caused cavitation thefuel line good 40 size motor will produce 6 7 pounds thrust takeoff ifyou have 4 pound airplane no way fuel going continue tofeed carburetoc can sometimes trick situation routing fuel line around thefrone carburetor looping carburetor isa httle fuel line post cavitation point often made mistakes idling motor too rich motor will continue idle very well surprising amount offuel accumulated crankcase However advance throttle motor speeds upi sprayed upper cylinder pretty hard keep aglow plug lit afuel stream spraying iv solution course adjust low speed needle leaner Some lesser likely causes motor quitting have run across asfollows Once Ifound piece offuel tubing sliver inside become peeled off acted like afoot valve would pass fuel slowly thefuel demand became great piece tended flop over close passage Another time customer brought motor just positively would idle run partial throttle Upon disassembling motor wefound owner hopped motor up smoothing out ports radiusing upper lip piston particular case small rodius completely changed scavagingflow byposs spraying glow plug Now another cause motor quitting idle low throttle moisture thefuel takes 8 10 drops water gallon offuel completely destroy idling ability day might have 95% humidity leave lid offfor 1/2 hour what going happen thefuel will evaporate evaporates cools becomes cooler surrounding air reaches dew point Water condenses wall container bath inside outside water outside course doesnt anything water inside becomes mixed thefuel prestoyou have haifa jug offuel wont idle worth aXXXX solution toss get another can Probably best insurance can buy against aflameout use Fox Mirocle Plug Ifyou havent tried should Happy Flying 6L~k Manufacturing Company 5305 Toweon Avenue Fort Smith AR 72901 Phone 501 64-1656 ones easy straightet wind blows sttonget lift wind angle becomes less perpendicular slope less lift Size shape slope Smooth solid air straight no obstructions means zilch has nothing blow against Ya gotta have hill dimensions hill cliff slope bump what puts together self-evident higher up better vertical better dont limit yourself just natural heaps dirt rocks some places might never think place fly Sometimes use Olympic pool building Belmont Shore because its got big flat wail facing wind friend stationed Oklahoma few months used hay barns get lift Watch seagulls other soaring birds see what use free ride try same Well thats hope gives some thing work opens up flying pos sibilities important part observant Watch what happens places fly time youll get know good surfer knows kind wave because fun depends wave similaronly invisible dont know look Slope Soaring News great publication Slope fliers does contain interesting articles like Chucks also has great kit re views fantastic photos informative looks such things building fiberglass fuselages vac uum bagging advanced radio techniques would like have another great source Soaring information one-year subscrip tions available $1595 check payable Charles Morey address Slope Soaring News 2601 E 19th St #29 Signal Hill CA 90804 Vortech Models P-Si Zero Jeff Fukn shima better-known fliers south ern California now producing Slope Scale kits P-Si Zero following what Slope Soaring News say about Jeffs P 51 kit Jeff produces complete P-Si Mustang kit fi berglass fuselage foam cores plans wood fuselage piece other words does assembly two halves feature makes kit easy build fiberglass-fuselage foam-core Slope plane airfoil semisymnhetrical configuration wing sheeted / plywood No doesnt come already sheeted have Jeffs P-Si flies Long Beach model should fly just about anywhere Zero brand-new looks great Jeff has reached agreement Bob Ratzlaff Wilshire Model Center sell kits Contact Wilshire Models 2836 Santa Monlca Blvd Santa Monica CA 90404 ph 213 828-9362 information Rohacell Composite materials becoming commonplace todays Sailplanes exciting useful products come along some time Rohacell Matt Gewain Composite Structures Technology sent some small samples test have say stuff amazing what Matt has say about As aeronautical engineer serious FM competitor last 12 years have tried nu merous construction methods closely watched development composite models Europe Recentiy have settled wing con struction method utilizing Kevlar carbon fiber extensively reinforcement balsa foam core materials However polysty rene polyurethane foams tried lacked com patibility model products resulting excessive weight finlshed addition foam compressed easily weakening model creating problems vacuum molding technlques used applying Kevlar carbon fiber Seeking solution led foam product best Euro pean modelers have using years great resultsRohacell Rohacell compatible current model ing adhesives finishes Plus works very easily much like balsawood times stronger polyurethane polystyrene foams modelers familiar 19 lb per Cu ft density F3B World Champion Raif Decker several noteworthy European fliers utiliz ing Rohacell build top competition machines Reiner Hofsas winner FiB 1985 Free Flight World Championships utilized Rohacell carbon fiber later Espada Wakefield FlB models Thomas Koster has used Rohacell foam several years development all-composite FiC models search perfect core material discovered other modelers also terested trying Rohacell experience along success others has convinced material has tremendous potential types modeling serious competitor ad vantages ease construction weight savings strength far outweigh somewhat higher price compared conventional materials Therefore am making Rohacell available modelers via Composite Structures Technology Dept JR2 3701 Inglewood Ave #268 Ingle wood CA 90287 162 Model Aviation tic /C ad fly Leisure Playboy LanZO Bomber valuable electric RIC lessOfl5• ight Fundamental good electric flight weight airframe Leisures Playboy ters both feature jghtWeight airframes takeoff climb capabilities long flights slow ~ndings n build4n stabilitY easy flying original Playboy Bomber designs started two old timers fly hands off too make perfect RIC trainer imnortant lesson Leisure PlayboY teach tO open up see because theyre electric silent can fly almost hobbY dealer pick up Leisure r kit inexpensive LeiSure 05 some good lessons Also available CST Keviar fiberglass cloth 56 oz 6 oz Safe-T-Poxy mold re lease spray vacuum bag sealant ready step up composite technology products may just what looking Pteranodon Press times have tried enlarge shrink airfoil meet needs resort TLAR Looks About Right conclusion like answer question lotsa times number books available show various plots namely Eppler series usually have ex act size want Now thing past Available Pteranodon Press plots size 300 different air foils Rich Neveln mastermind behind Pter anodon Press supplier great ser vice $2 large SASE Rich will send list available airfoils samples order ing info address Pteranodon Press PO Box 3650 Galdand CA 94609-0650 RC Electrics/Kopski Continued page 51 hundreds flights same motor same 12-cell flight battery pack past summer saw rekindled interest part night flying manifestation wing pods have added orig inal Eureka removable balsa pods rub berbanded place fact have used Astro Challenger well call pods Il luminons Illuminons 25-oz balsa struc tures about 17 long contain two 250 mAh cells switch charge jack two lens assem blies toy flashlights pointing ward aft Connections soldered dinary replaceable flashlight bulbs front Illuminon covered transparent yellow MonoKote rear red transparent addi tion several 18-in-long -in-wide strips chrome MonoKote taped rear II luminon what get Nighttime brilli ance dazzling fun multicolored Illumi nons permit full realization model attitude flightpath total darkness spotlight flashlight lens assemblies up front permit dead head-on landing approaches hori zon trailing chrome streamers provide brilli ant fiery afterburner appearance model flies away flight line short its sheer dazzlement may interested strongly recommend type flying docile models skilled pilots thoroughly fa miliar daylight flight characteristics said docile planes Otherwisego Its whole new fun-filled modeling variantbest done quiet clean Electric power course Eleetrostreak kit Great Planes mentioned last months column Im pass ing along suggestion may inter est anyone building As designed Elec trostreak has fully boxed-in nose section motor mount wing leading edge sides top bottom sheeting glued place same time plans show installing speed control receiver battery area just behind motor Well bit challenge tooshort too-fat fingers got very quickiy frustrat ed whole idea proceeded modiIi structure shown photos Sim ply putI installed good ol fashioned hatch As shown hatch fits down recess formed adding some 42 x Y6-in strip top outer edges fuselage sidesright top installed triangle stock area tri angle stock trimmed back inside edges inside step now formed about /6 wide Some top sheeting glued place shown leading edge location top fuselage front over motor formers latter sheeting extends rearward past rear motor former about /16 simple hatch cover made /32 balsa 4-in-wide /64 ply strip glued down side middle shown cover fits re cess formed described above flush glued-in-place top sheeting small tongue ply extends forward cover toes-in underneath front top sheet small plastic catch shown landing gear strap will installed #2 sheet metal screw center balsa top plate leading edge position will swing over rear edge hatch cover hold down swing away desired lift hatch off Either receiver pack speed control whatever can still attached underside hatch double-sticky Velcro originally intended Im sure modification will make fi nal installation subsequent maintenance much pleasant us such fin gers Iand everyone else too Putting alternative general wayI cant imagine Electric having access hatch Continued page 166 May1989 163