Free Flight: Indoor

NFFS PUBLICATIONS National Free Flight Society has publications foremost being annual Symposium report latest issue SYMPO 88 has 26 articles sev eral based computer simulations As usual design articles trim articles construc tion articles broad variety other topics cluding piece Jim Richmond Jim describes general philosophy approach has led him become Indoor World Champion five times have Symposi um reports NFFS has compiled indexed bibli ography Symposium reports using 34 keywords help locate articles model-ofthe-year selections references cited re ports valuable reference available $9 postpaid NFFS members $11 nonmem bers Order NFFS Publications 4858 Moorpark Avenue San Jose CA 95129 computer users same data available AppleWorks floppy disk author Jim Wilson 1030 Avenue D Redondo Beach CA 90277 $20 North America $25 else49 deg 253 pi5eh / / / 45 deg. 22 pitch / 35 Blade Station Figure 4 Above Analysis pitch change asymmetrical blade shape see info column FIgure 5 Below Modi led prop pitch setup block see text / Curve matches prof blocksetup block / Location block layout angle prop-mount block will work size Indoor prop holds safely shown glued inside Buds Novice Pennyplane transport box -V 12 see text 6 1/2 prop-mount block consists 3 layers 1/16 sheet balsa center layer slotted prop shaft NFFS Publications also has issues past Sympo reports 1972 through 1987 sev eral other technical historical publications Rules comments Don Slusarezyk very active 12 1/4 NI18 1 5 typ Figure 1 Two corrugated cardboard pieces used build up tmnsport box See text important differences between box its lid --zzim Flap edge inset Inner box ZIiZ\ Flap edge L set out U Outer box Figure 2 glue tabs offset permit fold inside inner box out side outer box leaves mat ing surfaces two parts smooth competent Senior following reaction ban steering proposal IND-90-l pub lished October 88 MA create air conditions building should penalized because conditions challenge anyone give three occasions flier inten tionally steered model illegally someone protested actions someone cheat ing flight should disqualified rather change rules Changing rules penal izes legal steerers' Continued page 172 ___ ~1 Inner Box Outer Box box joints look viewed above Bud uses white carpenters glue strong joints Another type joint butt joint can used its harder make uses length square hardwood strip corners no glue tabs heavy paper tape hold edges together 66 Model Aviation Free Flight Indoor Bud Tenny Box 545 Richardson TX 75080 Ceffikd Airtmnics Gold Label Super Namw Band Dual Receivers set 1991 certified independent tests state art FM PCIVI receivers meet eeed AMA RCMA specifications guidelines RIG operation 1991 beyond compact lightweight high performance Dual Conver sionFM PCvI Receivers produce dearei efficient signal less susceptible specific types intermodulation problems Speslflcatlons Aktruitss FM PCM Bold Label Super Nanny Band Dual Cotwemlon Ruulvars Receiver9296592765 TransmitternguardPCM4&6VanguardFM4& 92785 Module FM 92985 SpectralQuantum PCM Length2427 Width15136 Height08085 Weight2oz2oz 2 oz 2 oz AdjacentBetter -694 dBBetter -8t3 d8 Channel@85KHz Rejection-773dB @ -85 KIlz-692 dB@ 45 lHz Image671 dB7U8 riB Rejection 3rd QIP59 riSM38 riSM Airtivnics r ConversionReceiv eyou advantages supenor image rejection improved sensitivity nanvw bandwidth maxi mum interference rejection outstanding aircmft performance comes dual con version receiver technology thatlitters isnt gold Airtionics Receivers set gold standard 1991 beyond Contact Airtronics prices availability Sportsman Advanced trophies awarded promptly top 11 finishers you-know-who spared trans portation hassle coveted hunks walnut Next year maybe Guess will depend next years left RC Pattern awards ceremony held headquarters Holiday Inn NSRCA National Society RadioControlled Aerobatics treated comers fine buffet supper segment hobby maintains its separate activity group under AMA umbrella Chiefly groups organize area contests issue news letter take part rules making serve particular modeling activity manner possible Dynamic affable NSRCA President Craig Millet explained lo cal members assisted AMA running Nats Amazingly 41 volunteers re quired just staff Sportsman competi tion its 64 entrants Nats certainly labor intensive No question about competition doesnt appeal everyone other hand experience attending Nats seems strong catalyst energizing teaming up families saw scores examples photos inadequately depict few Competition pulse quickening spectator else would likes Jack Niclaus Al Unser Peggy Thomas Mike Tyson Dale Strawberry Mario Lemieux have loyal followers modelers have own champions Kristen sen Hyde Helms Able Richmond others neednt buy ticket watch superior efforts superstars have climbed peak achievement ladder summit ourselves un likely ever reach wouldnt grand bottom could manage just step higher Ill give up trying toehold next rung up Wont join 89 Nats maybe FF Duration/Linstrum Continued page 65 1 use 4 oz clear color wing tips bottom stab using Carters Marks-A-Lot 2 cut open Marks-A-Lot pull Out wick soak about 30cc denatured alco hol three four hours Remove wick squeeze pair pliers remove color spray brush inside dull side Micafllm mixture Let dry 3 Apply coat Balsarite thinned about 10-20% nitrate dope thinner Apply surfaces let dry Apply coat nitrate dope thinner allows some additional penetration Balsante removes globs 4 Apply coat Quickstik allow dry Use Quickstilc overlaps applying material edges before covering Use cyA stubborn spots comparison purposes find follow ing weights 85 x 29 sheets Micafilm Clearfour grams Clear colored blackfive grams Standard red Micafllmseven grains interested building Bobcat can supply black-line three-view full size about $4 postpaid FF Indoor/Tenny Continued page 66 comment Steering originated FlD soon became important competition tactic originally voiced reason adopting steering AMA events give additional training opportunities toward international compe tition IND-90-1 has nothing illegal steering Presumably CDs can enforce current rule suitably IND-90-l passed will mean tac tic steering has application speci fied AMA events FM Stick AMA Stick ROG Cabin Models kind danger poor conditiona natural obstructions site can still ballooned hut flight time tenni nates model touched balloon line Building Indoor boxes previous column October 88 M4 showed pictures new Novice Pennyplane box model box fits against rear small Sainsonite suitcase use transport leaving room box re pair tools cardboard folder balsa other repair materials extra-strong suitcase good model packing allows models shipped regular airline luggage Jim Clem has shipped similar Samsonite suitcase models mounted directly inside several years no problems 172 Model Aviation sGoodasGckl QRO Airtmnics \offers golden oppor tunity meet umdmceconvex challenge 1991 lowtransmitter receiver 1991 AMA Gold label spedfications operation Airtmnics major manufacturer offering compre hensive RIC system conversions economical price 1A stand behind comjatlble line accessones unmatched 1991 system upgrade service Alitroniw 1991 RICswtumcsnvorsIons $7495 *1Chpi0hlplSR AM FM Duei Conversion 1991 Receiver Nandlsg $5995 *XLICtaonWplModulelFM FM DualConversion 1991 Receiver sgac Stipping $5995 M Dual72 MHz ConversJon 1991 Receiver Sppagfl1ad ReUim RF Module arid Receiver An additional checkout charge will incurred complete transmitter returned * *Retum entIre Vanguard AM transmitter receiver Prices si4ject change notice Airtronics want known best just best known provides alternative ecper replacement Now latest new Airlatnics 1991 R/C transmitter receiver technology available cus tomers A]l system modulation changes indude new receiver RE Module ciiystal flag alignment xjAIRTRONICS INC 11 Autry Irvine CA 92718 714 830-8769 model box consists inner box outer box serving full-depth lid fits snugly over inner box inside dimensions suitcase define outside dimensions outer box Figure 1 shows dimensions corru gated cardboard used build Pennyplane box inner space box 18 x 1225 65 deep Figure 2 shows very important detail box ends inset inner box flaps will fit inside corners outer box reverse true Figure 3 shows top view both boxes flaps attach avoid interfering fit between lid box An alternate way assemble boxes use butt joint very corner joint %-in-sq hardwood strip reinforces joint paper wrapping tape covers outside joint neater solution requires much greater accuracy cutting cardboard purchase 4 x 8-ft cardboard sheets lo cal container vendor carefully lay out pat tern After cutting out pattern carefully scored along inner line flaps folded up right angles adjacent panel prebend seams until box almost holds its shape make trial assembly tempo rarily tape everything place long enough ver ify planned dimensions Finally glue joint time using white yellow carpenters glue laying out lid increase basic di mensions ensure lid will slip over inner box Remember glue flaps alternate prevent interference change lid layout accordingly two photos show prop mounts Pennyplane box built used mounts glue directly side box made three layers 1/16 balsa sheet center layer slotted pass prop shaft gallon-jug props Whats real pitch jug prop has asymmetrical shape regard layout line form actual pitch differs pitch form Figure 4 shows section through prop blank symmetrical respect layout line As blade gets narrow dashed line blade angle pitch increases amount shown important station shown used align blades prop sembly angle station prop de creases same angle Figure 5 shows prevent blade angle change Instead conventional angle tem plate add curved block layout line lo cation marked shown Align blade layout line blade will have calculated pitch blade symmetrical blade angle change nonsymmetrical area can calculated Flying opportunities following listing gives contact person area known have regular Indoor activity CDs If can give about 11 weeks no tice tell about contests Ill list California Santa Ana Santa Ana hangar currently available curt Stevens 25108 Marguerite Parkway Mis sion Viejo CA 92692 phone 714 240-8433 San Diego Monthly sessions Cat egory Howard Haupt 3860 Eco chee Ave San Diego CA 92117 ColoradoDenver Les Shaw 995 Mclntire St Boulder CO 80303 phone 303 499-0946 Connecti-Glastonbury George Armstead 89 CutHarvest Lane Glastonbury CT 06037 Florida Miami Dr John Martin 2180 Ti gertail Ave Miami FL 33133 phone 305 858-6363 Iowa Cedar Rapids Approximately weekly flying sessions winter 34ft ceiling Contact Paul Mcllrath 1524 48th St NE Cedar Rapids IA 52402 phone 319 393-4677 Massa- Cambridge Ray Harlan 15 Happy chuserts Hollow Rd Wayland MA 01778 phone 617 358-4013 New Jer- Glassboro Doug Barber 146 Strat sey ton House Maple Shade NJ 08052 phone 609235-5318 New York NYC Contact Ed Whitten PO Box 176 Wall St Station New York NY 10005 phone 212 7855327 info about possible flying Columbia University Oklahoma Oklahoma City Bill Baker PO Box 249 Norman OK 73070-0249 Pennsyl- Philadelphia Joe Krush 409 vania Warner Rd Wayne PA 19087 phone 215 688-3927 Doug Barber 146 Stratton House Maple Shade NJ 08052 phone 609 23553 18 Texas Ft Worth/Dallas Jesse Shepherd 2713 Summit View Bedford TX 76021 phone 817 282-3770 Utah Salt Like City Franldin Anderson 6137 Dee Park Dr Salt Lake City UT 84118 Continued page 176 January 1989 173 * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed SIG CHAMPION 2-STROKE FUEL FREIGHT FREE SHIPPING ON ORDERS OVER $1500 COLLECT PINTQUART GALLON55 GAL DRUM 0%Nitromethane$315$450$1075$19695 5%Nitromethane$365$525$1275$26495 10%Nitromethane$415$550$1475$32995 15%Nitromethane$430$635$1675$38995 25%Nitromethane$515$795$2195$52495 35% Nitromethane $595$925$2695$66995 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425$29995 15% Nitromethane$1625I$36495 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourself Ipcoo sotsect ehong wrihoot noSe See dealer first available order direct Call LZJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 iETHEM -pTjjjJ ~3to] BETTER NIII~ADDS up TO II111111PERFORMANCE NYROD THE ORIGINAL dU PUSH ROD COMPLETE WITH ALL REQUIRED METAL ____________________________________ FITTINGS IDEALLY SUITED FOR ANY PUSH ROD AcTION RUDDERS ELEvATORS AILERONS THROTTLE CONTROL BOATS SEA PLANES. YOUR jiac . IMAGINATION g 34 LONG ASSEMBLED LENGTHCat NYROD Su-PR-uNE PRODUCTS INC 18800 Stat Rout 47 E SIdne, Otilo 45365 Pt 513488-1721 HARDWARE INCLUDED 1-4 NYRODapter 1if Rod 2-56 Threaded end Washing-Seattle Kevin Collins 2320 Saha tonlee Dr E Redmond WA 98023 phone 206-868-8273 FF Old-Timers/Baker Continued page 67 Jim retired now after successful career engineering bit gold prospecting some song writing did share US Army Air Corps WW II flew Wakefield up until about 1950 never got around publish ing design think will forgotten once todays SAM fliers see plans hear California correspondents 50th anniversary 1939 Wakefield Championships will celebrated Taft Free Flight Champs SAM Champs nounced earlier Memorial Day weekend 1989 will feature genuine imported British fliersand maybe some fliers other coun tries such Canada Texasflying 1939 Wakefields should fun hope someone builds Bohash US Standard time gets trimand keeps away stockyards other two photos appearing months column show compressed-air-powered models 1988 SAM Champs Note both used three-cylinder motors made Bert Pond Bert has making Whoosier Whirl wind motors out bits brass tube sheet since ll long time ran him SAM Champs sold copy new book Erpansion Engine Powered Model Air craft $1895 book wonderful fun containing about total worlds knowl edge pertaining form model propulsion models find very interesting just stare plans motors figure out valves things work Compressed air models popular Twenties Thirties have rare since still flown SAM Champs must have near-calm conditions As conse quence official flights allowed contest day get good day during week fly event unusual original designs permitted going over plas tic bottles air tanks instead traditional brass sheet soldered up cylinder Bert still sells motors way have runs smoothly Singer sewing machine Anyway asked Bert should tell folks send him $20 get book mail No said postage handling surance comes $2055 OK what get talking left-brain dominant Just show him can too put copy book trusty Ohaus weighs 5677 grams figures out mere $0036 per grama bargain Someone will check weight complain copy lighter Well humid today copy may weigh less dry day Hey technical hobby Order book Bert Pond 128 Warren Terrace Longmeadow MA 01106 September issue wrongly identified photo Cabin Gas Model Berkeley Mus keteer heard Bill Effinger said didnt know what wasbut knew Musketeer heard Paul Forrette says does know what Long Cabin Paul says great flier RC sport flying maybe OK RC Texaco agrees Continued page 181 176 Model Aviation FF Old-Timers/Baker Continued page 176 big fin makes high power very tricky wants spiral dive flown hands-off same September column talked about importance having small fin area going fly Free Flight high power pleased get letter Bill McCombs senior engineer Vought Corporation agrees great book published Air Age Inc Model Airplane News some years ago entitled Flying Improving Scale Model Airplanes Find copy can Does anyone still have bunch sale includes much data FF performance stabil ity trim limited Scale models Bill later published Making Scale Models Fly mostly limited Scale principles apply flying thing think can buy later book directly him 2106 Siesta Dr Dallas TX 75224 last time saw Peck-Polymers catalog listed too can find copy earlier larger book think will agree worth hunt Bill says power climbing angle crease fin size can tolerated spiral flight developing smaller very large dihedral spiral flight can climb old enemy spiral dive lurks nearby very old antique Cabin models nce allowed cut off fin area increase dihedral d better fly Long Cabins Musketeers power levels designed handle next time Please keep letters photos coming Hansa No-CaI/Lidberg Continued page 69 Lay body down its left covered side glue motor stick making sure place stick wing must fit Add stabilizer wing havent already done make up tip tanks add jet engine Make lightening holes sheet balsa parts using piece sharpened brass tub ing eraser holder old wooden pencil cover parts glue place Attach ioop rubber check balance Add clay front body necessary obtain balance point shown plan Check plane over warps us ing dry heat electric stove burner space heater straighten out Try test glide making sure prop freewheels air Some adjustment add ing removing clay may necessary optimal glide Try some power flights Use about 100 turns making sure wind correct direction Power adjustments made largely using bendable thrust bear ing model stalls bend bit downthrust wont climb take out some downthrust add turns and/or take off some clay airplane seems happiest wide climb turn youre ready turn few heads flying field Hansa surefire way have some fun doing Lippisch/Mcllrath Continued page 72 another idea didnt pan out course such failures frustrations common research work some times disappointments can provide laughalthough humor situa tion might obvious time Such incident occurred building new tail duct replace dam aged flying model should light flies off workbench itself favorite Lippisch expression Saving weight always pri mary building goals particular morning doctor stopped workbench inspect nearly completed duct section picked up part weighed hand tossed down bench obvious dissatisfaction Too heavy announced Much too heavy its lots lighter old argued Twenty-three grams instead 31 Dr Lippisch sputtered moment stmggling find way explain such obvious principle poor slow-witted fellow Finally controlling himself ef fort quoted what might called Lip pischs First Law Aerodynamics feels too heavy too heavy marched out shop probably silently lamenting problem finding good model builders anymore As several stories have shown Dr Lippischs wit often mixed wisdom Sometimes after care ful reflection listener could tease out much playfulness much penetration words contained example friend once told discussion Dr Lippisch building pedal-powered plane jokingly called pedalfiugel un der consideration plane built like giant Indoor model using balsa much stmcture doctor describing amazing strength balsa tail boom section just tested Fifteen hundred pounds supported compression reported enthusiastically can keep compression interrupted another listener What some unexpected loads buckles tail collapses asked lis tener thinking course fate unfortunate individual manning ped als handlebars breaks fix answered doctorhis standard response whenever questioned strength unmanned models immediately resumed earlier dis cussion surprised hear doctor seemingly brush aside issue pilots safety safety people flying airplanes always Dr Lippischs pri mary concern proud fact never fatal accident during testing of civil designs wartime development fu turistic rocket-powered Me-163 ad hered cautious methods doctor followed earlier work Testing gan unpowered flights glider tiny interceptor towed aloft plane released high altitude Engineering measurements pilot familiarization exciting aerobatics safely per formed during long glides back earth Obviously pilots safety line breaks fix just wasnt like doctor ignoring danger accident pedalfiugel Looking back dont think Dr Lippisch years experi ence areas related man-powered air craft low-speed flight lightweight struc tures ground effect phenomena testing unorthodox machines Long before conversation understandably con cerned listener must have visualized actually calculated floating shoulderhigh flight giant Indoor model clearly sure serious injury highiy unlikely considered prob lem decided would problem erased mind Years later history Gossamer Condor Albatross projects confirmed principles extreme lightuess easy repairability two keys success human-powered flight As breaks fix dozens crashes Condor Albatross sur vived serious injury proved underneath its apparent casualness Dr Lip pischs maxim expressed sound engineer ing principle Dr Alexander Lippisch man ahead time ideas advanced spent whole adult life dragging much aeronautical world along behind him Trying convince doubting experts hed snort used term pleading businessmen research funds trying make rest us see future through eyes Sustaining kind effort year after year demands combination qualities few men possess Probably vivid sense humor traits made possible Doctor Lippischs brilliant leadership aeronautical science nearly 60 years CL Aerobatics/Fancher Continued page 74 response rate somewhat Nonetheless found ship could flown fairly comfort ably supplied Dacron lines handle later fly ship bellcrank itself mounted top wing control lines exit fuselage along top inboard wing similar cur rent Combat models clever two-piece lead out guide provided locate lead-outs January 1989 181

NFFS PUBLICATIONS National Free Flight Society has publications foremost being annual Symposium report latest issue SYMPO 88 has 26 articles sev eral based computer simulations As usual design articles trim articles construc tion articles broad variety other topics cluding piece Jim Richmond Jim describes general philosophy approach has led him become Indoor World Champion five times have Symposi um reports NFFS has compiled indexed bibli ography Symposium reports using 34 keywords help locate articles model-ofthe-year selections references cited re ports valuable reference available $9 postpaid NFFS members $11 nonmem bers Order NFFS Publications 4858 Moorpark Avenue San Jose CA 95129 computer users same data available AppleWorks floppy disk author Jim Wilson 1030 Avenue D Redondo Beach CA 90277 $20 North America $25 else49 deg 253 pi5eh / / / 45 deg. 22 pitch / 35 Blade Station Figure 4 Above Analysis pitch change asymmetrical blade shape see info column FIgure 5 Below Modi led prop pitch setup block see text / Curve matches prof blocksetup block / Location block layout angle prop-mount block will work size Indoor prop holds safely shown glued inside Buds Novice Pennyplane transport box -V 12 see text 6 1/2 prop-mount block consists 3 layers 1/16 sheet balsa center layer slotted prop shaft NFFS Publications also has issues past Sympo reports 1972 through 1987 sev eral other technical historical publications Rules comments Don Slusarezyk very active 12 1/4 NI18 1 5 typ Figure 1 Two corrugated cardboard pieces used build up tmnsport box See text important differences between box its lid --zzim Flap edge inset Inner box ZIiZ\ Flap edge L set out U Outer box Figure 2 glue tabs offset permit fold inside inner box out side outer box leaves mat ing surfaces two parts smooth competent Senior following reaction ban steering proposal IND-90-l pub lished October 88 MA create air conditions building should penalized because conditions challenge anyone give three occasions flier inten tionally steered model illegally someone protested actions someone cheat ing flight should disqualified rather change rules Changing rules penal izes legal steerers' Continued page 172 ___ ~1 Inner Box Outer Box box joints look viewed above Bud uses white carpenters glue strong joints Another type joint butt joint can used its harder make uses length square hardwood strip corners no glue tabs heavy paper tape hold edges together 66 Model Aviation Free Flight Indoor Bud Tenny Box 545 Richardson TX 75080 Ceffikd Airtmnics Gold Label Super Namw Band Dual Receivers set 1991 certified independent tests state art FM PCIVI receivers meet eeed AMA RCMA specifications guidelines RIG operation 1991 beyond compact lightweight high performance Dual Conver sionFM PCvI Receivers produce dearei efficient signal less susceptible specific types intermodulation problems Speslflcatlons Aktruitss FM PCM Bold Label Super Nanny Band Dual Cotwemlon Ruulvars Receiver9296592765 TransmitternguardPCM4&6VanguardFM4& 92785 Module FM 92985 SpectralQuantum PCM Length2427 Width15136 Height08085 Weight2oz2oz 2 oz 2 oz AdjacentBetter -694 dBBetter -8t3 d8 Channel@85KHz Rejection-773dB @ -85 KIlz-692 dB@ 45 lHz Image671 dB7U8 riB Rejection 3rd QIP59 riSM38 riSM Airtivnics r ConversionReceiv eyou advantages supenor image rejection improved sensitivity nanvw bandwidth maxi mum interference rejection outstanding aircmft performance comes dual con version receiver technology thatlitters isnt gold Airtionics Receivers set gold standard 1991 beyond Contact Airtronics prices availability Sportsman Advanced trophies awarded promptly top 11 finishers you-know-who spared trans portation hassle coveted hunks walnut Next year maybe Guess will depend next years left RC Pattern awards ceremony held headquarters Holiday Inn NSRCA National Society RadioControlled Aerobatics treated comers fine buffet supper segment hobby maintains its separate activity group under AMA umbrella Chiefly groups organize area contests issue news letter take part rules making serve particular modeling activity manner possible Dynamic affable NSRCA President Craig Millet explained lo cal members assisted AMA running Nats Amazingly 41 volunteers re quired just staff Sportsman competi tion its 64 entrants Nats certainly labor intensive No question about competition doesnt appeal everyone other hand experience attending Nats seems strong catalyst energizing teaming up families saw scores examples photos inadequately depict few Competition pulse quickening spectator else would likes Jack Niclaus Al Unser Peggy Thomas Mike Tyson Dale Strawberry Mario Lemieux have loyal followers modelers have own champions Kristen sen Hyde Helms Able Richmond others neednt buy ticket watch superior efforts superstars have climbed peak achievement ladder summit ourselves un likely ever reach wouldnt grand bottom could manage just step higher Ill give up trying toehold next rung up Wont join 89 Nats maybe FF Duration/Linstrum Continued page 65 1 use 4 oz clear color wing tips bottom stab using Carters Marks-A-Lot 2 cut open Marks-A-Lot pull Out wick soak about 30cc denatured alco hol three four hours Remove wick squeeze pair pliers remove color spray brush inside dull side Micafllm mixture Let dry 3 Apply coat Balsarite thinned about 10-20% nitrate dope thinner Apply surfaces let dry Apply coat nitrate dope thinner allows some additional penetration Balsante removes globs 4 Apply coat Quickstik allow dry Use Quickstilc overlaps applying material edges before covering Use cyA stubborn spots comparison purposes find follow ing weights 85 x 29 sheets Micafilm Clearfour grams Clear colored blackfive grams Standard red Micafllmseven grains interested building Bobcat can supply black-line three-view full size about $4 postpaid FF Indoor/Tenny Continued page 66 comment Steering originated FlD soon became important competition tactic originally voiced reason adopting steering AMA events give additional training opportunities toward international compe tition IND-90-1 has nothing illegal steering Presumably CDs can enforce current rule suitably IND-90-l passed will mean tac tic steering has application speci fied AMA events FM Stick AMA Stick ROG Cabin Models kind danger poor conditiona natural obstructions site can still ballooned hut flight time tenni nates model touched balloon line Building Indoor boxes previous column October 88 M4 showed pictures new Novice Pennyplane box model box fits against rear small Sainsonite suitcase use transport leaving room box re pair tools cardboard folder balsa other repair materials extra-strong suitcase good model packing allows models shipped regular airline luggage Jim Clem has shipped similar Samsonite suitcase models mounted directly inside several years no problems 172 Model Aviation sGoodasGckl QRO Airtmnics \offers golden oppor tunity meet umdmceconvex challenge 1991 lowtransmitter receiver 1991 AMA Gold label spedfications operation Airtmnics major manufacturer offering compre hensive RIC system conversions economical price 1A stand behind comjatlble line accessones unmatched 1991 system upgrade service Alitroniw 1991 RICswtumcsnvorsIons $7495 *1Chpi0hlplSR AM FM Duei Conversion 1991 Receiver Nandlsg $5995 *XLICtaonWplModulelFM FM DualConversion 1991 Receiver sgac Stipping $5995 M Dual72 MHz ConversJon 1991 Receiver Sppagfl1ad ReUim RF Module arid Receiver An additional checkout charge will incurred complete transmitter returned * *Retum entIre Vanguard AM transmitter receiver Prices si4ject change notice Airtronics want known best just best known provides alternative ecper replacement Now latest new Airlatnics 1991 R/C transmitter receiver technology available cus tomers A]l system modulation changes indude new receiver RE Module ciiystal flag alignment xjAIRTRONICS INC 11 Autry Irvine CA 92718 714 830-8769 model box consists inner box outer box serving full-depth lid fits snugly over inner box inside dimensions suitcase define outside dimensions outer box Figure 1 shows dimensions corru gated cardboard used build Pennyplane box inner space box 18 x 1225 65 deep Figure 2 shows very important detail box ends inset inner box flaps will fit inside corners outer box reverse true Figure 3 shows top view both boxes flaps attach avoid interfering fit between lid box An alternate way assemble boxes use butt joint very corner joint %-in-sq hardwood strip reinforces joint paper wrapping tape covers outside joint neater solution requires much greater accuracy cutting cardboard purchase 4 x 8-ft cardboard sheets lo cal container vendor carefully lay out pat tern After cutting out pattern carefully scored along inner line flaps folded up right angles adjacent panel prebend seams until box almost holds its shape make trial assembly tempo rarily tape everything place long enough ver ify planned dimensions Finally glue joint time using white yellow carpenters glue laying out lid increase basic di mensions ensure lid will slip over inner box Remember glue flaps alternate prevent interference change lid layout accordingly two photos show prop mounts Pennyplane box built used mounts glue directly side box made three layers 1/16 balsa sheet center layer slotted pass prop shaft gallon-jug props Whats real pitch jug prop has asymmetrical shape regard layout line form actual pitch differs pitch form Figure 4 shows section through prop blank symmetrical respect layout line As blade gets narrow dashed line blade angle pitch increases amount shown important station shown used align blades prop sembly angle station prop de creases same angle Figure 5 shows prevent blade angle change Instead conventional angle tem plate add curved block layout line lo cation marked shown Align blade layout line blade will have calculated pitch blade symmetrical blade angle change nonsymmetrical area can calculated Flying opportunities following listing gives contact person area known have regular Indoor activity CDs If can give about 11 weeks no tice tell about contests Ill list California Santa Ana Santa Ana hangar currently available curt Stevens 25108 Marguerite Parkway Mis sion Viejo CA 92692 phone 714 240-8433 San Diego Monthly sessions Cat egory Howard Haupt 3860 Eco chee Ave San Diego CA 92117 ColoradoDenver Les Shaw 995 Mclntire St Boulder CO 80303 phone 303 499-0946 Connecti-Glastonbury George Armstead 89 CutHarvest Lane Glastonbury CT 06037 Florida Miami Dr John Martin 2180 Ti gertail Ave Miami FL 33133 phone 305 858-6363 Iowa Cedar Rapids Approximately weekly flying sessions winter 34ft ceiling Contact Paul Mcllrath 1524 48th St NE Cedar Rapids IA 52402 phone 319 393-4677 Massa- Cambridge Ray Harlan 15 Happy chuserts Hollow Rd Wayland MA 01778 phone 617 358-4013 New Jer- Glassboro Doug Barber 146 Strat sey ton House Maple Shade NJ 08052 phone 609235-5318 New York NYC Contact Ed Whitten PO Box 176 Wall St Station New York NY 10005 phone 212 7855327 info about possible flying Columbia University Oklahoma Oklahoma City Bill Baker PO Box 249 Norman OK 73070-0249 Pennsyl- Philadelphia Joe Krush 409 vania Warner Rd Wayne PA 19087 phone 215 688-3927 Doug Barber 146 Stratton House Maple Shade NJ 08052 phone 609 23553 18 Texas Ft Worth/Dallas Jesse Shepherd 2713 Summit View Bedford TX 76021 phone 817 282-3770 Utah Salt Like City Franldin Anderson 6137 Dee Park Dr Salt Lake City UT 84118 Continued page 176 January 1989 173 * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed SIG CHAMPION 2-STROKE FUEL FREIGHT FREE SHIPPING ON ORDERS OVER $1500 COLLECT PINTQUART GALLON55 GAL DRUM 0%Nitromethane$315$450$1075$19695 5%Nitromethane$365$525$1275$26495 10%Nitromethane$415$550$1475$32995 15%Nitromethane$430$635$1675$38995 25%Nitromethane$515$795$2195$52495 35% Nitromethane $595$925$2695$66995 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425$29995 15% Nitromethane$1625I$36495 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourself Ipcoo sotsect ehong wrihoot noSe See dealer first available order direct Call LZJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 iETHEM -pTjjjJ ~3to] BETTER NIII~ADDS up TO II111111PERFORMANCE NYROD THE ORIGINAL dU PUSH ROD COMPLETE WITH ALL REQUIRED METAL ____________________________________ FITTINGS IDEALLY SUITED FOR ANY PUSH ROD AcTION RUDDERS ELEvATORS AILERONS THROTTLE CONTROL BOATS SEA PLANES. YOUR jiac . IMAGINATION g 34 LONG ASSEMBLED LENGTHCat NYROD Su-PR-uNE PRODUCTS INC 18800 Stat Rout 47 E SIdne, Otilo 45365 Pt 513488-1721 HARDWARE INCLUDED 1-4 NYRODapter 1if Rod 2-56 Threaded end Washing-Seattle Kevin Collins 2320 Saha tonlee Dr E Redmond WA 98023 phone 206-868-8273 FF Old-Timers/Baker Continued page 67 Jim retired now after successful career engineering bit gold prospecting some song writing did share US Army Air Corps WW II flew Wakefield up until about 1950 never got around publish ing design think will forgotten once todays SAM fliers see plans hear California correspondents 50th anniversary 1939 Wakefield Championships will celebrated Taft Free Flight Champs SAM Champs nounced earlier Memorial Day weekend 1989 will feature genuine imported British fliersand maybe some fliers other coun tries such Canada Texasflying 1939 Wakefields should fun hope someone builds Bohash US Standard time gets trimand keeps away stockyards other two photos appearing months column show compressed-air-powered models 1988 SAM Champs Note both used three-cylinder motors made Bert Pond Bert has making Whoosier Whirl wind motors out bits brass tube sheet since ll long time ran him SAM Champs sold copy new book Erpansion Engine Powered Model Air craft $1895 book wonderful fun containing about total worlds knowl edge pertaining form model propulsion models find very interesting just stare plans motors figure out valves things work Compressed air models popular Twenties Thirties have rare since still flown SAM Champs must have near-calm conditions As conse quence official flights allowed contest day get good day during week fly event unusual original designs permitted going over plas tic bottles air tanks instead traditional brass sheet soldered up cylinder Bert still sells motors way have runs smoothly Singer sewing machine Anyway asked Bert should tell folks send him $20 get book mail No said postage handling surance comes $2055 OK what get talking left-brain dominant Just show him can too put copy book trusty Ohaus weighs 5677 grams figures out mere $0036 per grama bargain Someone will check weight complain copy lighter Well humid today copy may weigh less dry day Hey technical hobby Order book Bert Pond 128 Warren Terrace Longmeadow MA 01106 September issue wrongly identified photo Cabin Gas Model Berkeley Mus keteer heard Bill Effinger said didnt know what wasbut knew Musketeer heard Paul Forrette says does know what Long Cabin Paul says great flier RC sport flying maybe OK RC Texaco agrees Continued page 181 176 Model Aviation FF Old-Timers/Baker Continued page 176 big fin makes high power very tricky wants spiral dive flown hands-off same September column talked about importance having small fin area going fly Free Flight high power pleased get letter Bill McCombs senior engineer Vought Corporation agrees great book published Air Age Inc Model Airplane News some years ago entitled Flying Improving Scale Model Airplanes Find copy can Does anyone still have bunch sale includes much data FF performance stabil ity trim limited Scale models Bill later published Making Scale Models Fly mostly limited Scale principles apply flying thing think can buy later book directly him 2106 Siesta Dr Dallas TX 75224 last time saw Peck-Polymers catalog listed too can find copy earlier larger book think will agree worth hunt Bill says power climbing angle crease fin size can tolerated spiral flight developing smaller very large dihedral spiral flight can climb old enemy spiral dive lurks nearby very old antique Cabin models nce allowed cut off fin area increase dihedral d better fly Long Cabins Musketeers power levels designed handle next time Please keep letters photos coming Hansa No-CaI/Lidberg Continued page 69 Lay body down its left covered side glue motor stick making sure place stick wing must fit Add stabilizer wing havent already done make up tip tanks add jet engine Make lightening holes sheet balsa parts using piece sharpened brass tub ing eraser holder old wooden pencil cover parts glue place Attach ioop rubber check balance Add clay front body necessary obtain balance point shown plan Check plane over warps us ing dry heat electric stove burner space heater straighten out Try test glide making sure prop freewheels air Some adjustment add ing removing clay may necessary optimal glide Try some power flights Use about 100 turns making sure wind correct direction Power adjustments made largely using bendable thrust bear ing model stalls bend bit downthrust wont climb take out some downthrust add turns and/or take off some clay airplane seems happiest wide climb turn youre ready turn few heads flying field Hansa surefire way have some fun doing Lippisch/Mcllrath Continued page 72 another idea didnt pan out course such failures frustrations common research work some times disappointments can provide laughalthough humor situa tion might obvious time Such incident occurred building new tail duct replace dam aged flying model should light flies off workbench itself favorite Lippisch expression Saving weight always pri mary building goals particular morning doctor stopped workbench inspect nearly completed duct section picked up part weighed hand tossed down bench obvious dissatisfaction Too heavy announced Much too heavy its lots lighter old argued Twenty-three grams instead 31 Dr Lippisch sputtered moment stmggling find way explain such obvious principle poor slow-witted fellow Finally controlling himself ef fort quoted what might called Lip pischs First Law Aerodynamics feels too heavy too heavy marched out shop probably silently lamenting problem finding good model builders anymore As several stories have shown Dr Lippischs wit often mixed wisdom Sometimes after care ful reflection listener could tease out much playfulness much penetration words contained example friend once told discussion Dr Lippisch building pedal-powered plane jokingly called pedalfiugel un der consideration plane built like giant Indoor model using balsa much stmcture doctor describing amazing strength balsa tail boom section just tested Fifteen hundred pounds supported compression reported enthusiastically can keep compression interrupted another listener What some unexpected loads buckles tail collapses asked lis tener thinking course fate unfortunate individual manning ped als handlebars breaks fix answered doctorhis standard response whenever questioned strength unmanned models immediately resumed earlier dis cussion surprised hear doctor seemingly brush aside issue pilots safety safety people flying airplanes always Dr Lippischs pri mary concern proud fact never fatal accident during testing of civil designs wartime development fu turistic rocket-powered Me-163 ad hered cautious methods doctor followed earlier work Testing gan unpowered flights glider tiny interceptor towed aloft plane released high altitude Engineering measurements pilot familiarization exciting aerobatics safely per formed during long glides back earth Obviously pilots safety line breaks fix just wasnt like doctor ignoring danger accident pedalfiugel Looking back dont think Dr Lippisch years experi ence areas related man-powered air craft low-speed flight lightweight struc tures ground effect phenomena testing unorthodox machines Long before conversation understandably con cerned listener must have visualized actually calculated floating shoulderhigh flight giant Indoor model clearly sure serious injury highiy unlikely considered prob lem decided would problem erased mind Years later history Gossamer Condor Albatross projects confirmed principles extreme lightuess easy repairability two keys success human-powered flight As breaks fix dozens crashes Condor Albatross sur vived serious injury proved underneath its apparent casualness Dr Lip pischs maxim expressed sound engineer ing principle Dr Alexander Lippisch man ahead time ideas advanced spent whole adult life dragging much aeronautical world along behind him Trying convince doubting experts hed snort used term pleading businessmen research funds trying make rest us see future through eyes Sustaining kind effort year after year demands combination qualities few men possess Probably vivid sense humor traits made possible Doctor Lippischs brilliant leadership aeronautical science nearly 60 years CL Aerobatics/Fancher Continued page 74 response rate somewhat Nonetheless found ship could flown fairly comfort ably supplied Dacron lines handle later fly ship bellcrank itself mounted top wing control lines exit fuselage along top inboard wing similar cur rent Combat models clever two-piece lead out guide provided locate lead-outs January 1989 181