Free Flight. Du ration Bob Meu ser MAGNUM Although semantic im plications small magnum earth shattering Vic Cunnyngham Jr son Jeff have built several magnums various sizes during past four years design scientific models Start Galaxie size suit fancy Add rib bay wing tip Lengthen body stabilizer chord Turn rudder around mount hind stab Fuselage easy-to-build uniform-width construction cheeks added just behind firewall Everything built flat no intentional warps geodetic construction ensures wont unintentional ones either Vic says flies right off draw ing board didnt mention lands Venerable S-Hook Re-Re-Revisited First off lets get nomenclature straight term S-hook has two rather different meanings Free Flight parlance refers situation rubber motor connected directly propshaft Looking propshaft rear S-hook looks like 5 See article No Noncents July 1976 ModAv supposed keep rubber centered doesnt thats getting ahead 71r7- ~7 ==J~= N-, \ 7 IIII mcsm Vc Cunnpt8ham Jr Vic Cunnyngham son Jeff have building Magnums several sizes far past four years story another usage S-hook means whatever sort gadget used connect rubber propshaft Such gad get necessary kind model beefier Peanut Scale Indoor model wound rubber motor discon nected prop olden times simply piece music wire bent look like 5 IZx~ber Lctnd rizznJ - TZz wire tuiin variation old clothspin trick almost filed under dumb ideas before Bob tried biggest advantage Vince Ferrareses pin instant adjustability clamping force 56 Model Aviation P-ju outdoor rubber rapidly increasing popularity Bobs Spookweight 30 grams out rubber Borrows few indoor construction techniques torque controlled auto-stab Dolores Snyder displays little Asteroid rub ber-powered model George Perryman design early Thirtiesbefore George began de signing funny looking ships Roselle plc Having some standard time proven S-hooks fail job re cently gave cause reconsider problem has come up motors considerably longer hook-to-hook distance new made-in-America rubber youre still flying Wakefield Pirelli perhaps dont have problem result has Mulvihill Oldtimer stickntissue fuselages have suffered internal hemorrhages S-hook got side ways George Xenakis has using scheme connecting motor propshaft looks should work under imaginable conditions fact does design comes originally Frank Parmenter sketch shows have tape-controlled milling machine basement its cinch limited drills files hacksaws lots cussin still possible cross pin removable necessary number strands twice odd number 10 14 18 etc num ber strands twice number say multiple 412 16 20 etc cross pin can permanently tached number strands twice neither odd nor number dont want hear about Pirelli Rubber mixed emotions present report seems abun dantly clear both Fred Pearces tests reports others have used stuff both indoor outdoor competition activities new Pirelli rubber some 5 10% better best rubber have previously access Thats good part bad parts cant get could b couldnt afford writing mid-August no steady US source has developed neighbors uncle has nightwatchman Pirelli works Milano Quoted prices high $30 pound begins make RC seem cheap Fred tests small quantities rubber5 grams soby stretching rubber nearly breaking point plot ting tensile force against stretch distance force relaxed Chris Mat suno tests full-size motors winding Fred points out Chris compare notes frequently stretch tests winding tests give virtually same results specific energy energy per unit mass new Pirelli 3860 ft lb/lb Thats way saying quantity rubber will release enough energy raise itself altitude 3860 ft best energy storage figure Ive encountered previous best Continued page 116 Music wire dip % od frciss tt4e 1 rivet jl C 3 32 7 lb ft-Ib/W 3 ( make S-hook just bend piece wire Right use connect prop shaft some models might find need George Xenakis Good luck text 242220iS 4 12 JO 8 6 4 2 0 fr77{Lati 7jPi-di 77A1 T5FAI / II 78 PirelLiI / l70 II I I/ 200400oO0090400 Stretdt in6u6 Fred Pearce tests small quantities rubber stretching nearly breaking point plotting tensile force against stretch distance force relaxed Graph shows typical results 77 1A1 78 FAT 7 Filatt 72 PirelLi December1978 57 3 r 3 140IZO AMA WINGS ME AND MY RC 78 NATS 4 COLOR4 COLOR PERMISSION FROM AMA LUSIVE RIGHTSWhile Last FROM ROYAL CROWN COLA Green color Pattern Pylon Soaring Chopper Free Flight RC Widow Heavenly Sport RC Cherub Ukie Speed Rat Racer Combat Aerobatics choice white 50/50% polyester shirt navy trim $550 Postage FLI CAP 4 Color AMA Wines 5 M L Size Adjustable $550 Postage custom work clubsspecial events businesses Any size color print shirts jackets caps Information sent request FLI * HIRT 5132 DEL REY LAS VEGAS NEVADA 89102 proper balance achieved flying surfaces may glued place Use slow hardening epoxy glue cement wing stab place advisable dowel pin wing fuselage done drilling three 3/16 holes through center section wing about inch fuselage whereupon drilled holes fitted hard wood dowel pins glued place point wing stabilizer filleted fuselage Fiberglass recommended material rear cap strip added top rear fuselage contoured shape fuselage Fabricate rear engine mounting bracket bracket constructed 1/4 3-16 aluminum stock airfoiled shape bracket can mounted ways however suggested methods follows Drill mount ing bracket positions denoted plans 6-32 clearance drill also drill fuselage least center po sition way through bot tom point blind mounting nut pulled place hole has drilled way through body body must hollowed proper place accommodate blind nuts second method drill tap bracket two 6-32 machine screws body drilled way through clearance drill whereupon machine screws run up through fuselage thread bracket second method used record setting air plane equivalent strength method bit easier install pipe retaining clip formed 020 steel stock stainless steel stock Stain less steel stock preferred material because will rust dur able clip fastened bracket 4-40 machine screw Sand entire airplane smooth Fill nicks cracks holes filler resand have preferred finishing technique use provided fuel-proof finish record airplane two coats Hobbypoxy clear sanded between coats two coats Super Poxy color first coat being brushed sanded last coat just sprayed oni am sure would work very well After takeoff get pylon soon pos Flying fuel speed sible fly airplane near records have set 50% nitromethane perfect groove possible Jets much 50% propylene oxide although some susceptible extreme loss others have success varying speed due deviating perfect nitro-propyl ratio slightly possibly suit groove case propeller weather conditions given day aircraft number 46 081 dia drill size Good luck Super Burp metering jet seems work best have questions feel free contact series 1 head number 42 0935 Mike Langlois 2408 W Cornwallis dia series 2 head Drill 12 metering Dr Greensboro NC 27408 jets #42 thru #53 Larger metering jets can made Dooling needle valve fittings F F Duration/Meuser similar brass fittings long continued page 57 seat properly spray bar ring used seal Only trial error will determine metering jet size will work best particular engine airplane combina tion Make first flight attempts richest metering jet will run ship hand held ground engine cuts off after release try next size smaller metering jet until keeps run ning Usually rule upright engine design richer run faster go Uprights usually lean out start finish although uni flow fuel tank Super Burp tends minimize change 100% rule engine/airplane combina tion try leaning yours down metering jet after have run rich can start engine use truck tire pump source air Any other source compressed air will work equally well buzz box conjunction probe used supply spark needed ignite fuel-air mixture entering combustion chamber during ignition probe use electric stove oven element cut end will protrude approximate spark plug location tail pipe used element can ob tained local used furniture appliance store flying airplane make sure line taut takeoff ready pull airplane pitmans hand releases airplane can skidded off use dolly wish use properly designed dolly takeoff 116 Model Aviation Pirelli 1964 material gave 3520 whereas average Pirelli near 3300 Current FAT Supply rubber run ning 3545 excellent average new Pirelli confused Filati 1977 batch Filati tested out 1570 graph shows results some Freds recent tests Note fall-off tension new Pirelli grad ual other kinds rubber Fred points out too-rapid fall-off can treacherous torque falls off too rapidly model unable readjust its climb attitude rapidly enough result ing mushing stall shortly after launching test data shown meas ured during mid-1978 except 1972 Pirelli measured mid1977 Note 1977 FAT rubber slightly harder 1978 FAI rub ber specific energy about same Fred thinks rubber actually about same man ufactured difference simply typical effect aging Test curves 1977 material made during 1977 look about like 1978 test curves 1978 material Anybody know can get some 1977 Filati Id like have some give friends CO-2 Duration New Indoor Class Bob Bailey England writing eromodel ler magazine tells about attempts half-dozen modelers see what could such models best far 642 flight Ian Dowsett model spans 44 inches Construction light course light Wing diagonal-rib Easy B construction 1/16 sq sliced ribs 1/16 X / leading trailing edges tapering 1/16 sq Stab 1/16 sq measures 4 X 18 smallish Fuselage 1/32-sheet box rub ber 1/32 sheet Max wing chord 61/8 tips tapered 4 All-up weight 26 grams plastic 7 inch Super Sleek Streak prop used giving motor run about 4 minutes rest glide Bailey sug gests prop develop ment effort should placed sus pect well soon seeing 9- 10-inch Pennyplane-style props sized engine puts out its last grunt just model touches down Telco isor British put Telco aretaking interest possibility trophy annual event wonder theyll limit event own brand stuff commercially available stuff just what Given free hand can see possibly develop highly sophisticated thing experts building own potentially danger ous hardware next thing know well asking Say whatever happened Indoor CO-2 Seems like sort dumb event wonder theyll accept proxyflown models CO-2 Duration New Outdoor Class 1978 British Nats saw first running Scramble event CO-2 duration models idea scramble origi nated Australia Clearly continued ex posure inverted environment made bit light head Anyhow idea get much total flight duration given time period can 'max~ number flights limited laws nature human endurance Contestants re quired retrieve foot Nats CO-2 Scramble halfhour time limit held during mid-afternoon heat exceptionally hot Nats Phil Ball won nine flights totaling 1042 Dihedral Joints Dihedral joints always pain about best can say methods making some less painful others methodone less painful ones have used several models recent ly has worked out rather well Say building model having flat center panel tip dihedral Build center section first canting end ribs inward course glue dry prop up proper dihedral angle Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 mare RPM greater power longer life replacing plug popular Y2-A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VDC charger recommended build tip right onto after has set spell prop whole thing up proper angle build other tip could start tip prop up add center panel forth little thought can arrange things minimum amount wing sticking up minimum length time somewhat vulnerable damage method works poly hedral too course Ribs dihedral joints tend warp due tension covering should thicker harder material regular ribs Leading Edges leading-edge conD FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VOC Stingerat big savings - championship products world modelers --DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 struction shown sketch used Jim Jones little complicated sticking piece quarter-square has lot offer tee-section basically lot stiffer conventional leading edge same weight way Jim does leading edge automat ically comes out rather accurately formed since leading edge shape prob December1978 117 NEW 1/2-A plugs Join Team ably important feature air foil thats important Furthermore stem T well anchored ribs wrinkles covering ribs join leading edge unlikely idea strip exactly right width begin about left sanding until notches disappear An accurate drawing leading edge regionperhaps two three times life size smaller modelsis starting point design leading edge way want cut strips suit take easier route designing leading edge accom modate stock wood sizes Variation No 437 Common House hold Clothespin about file under Dumb Ideas until tried Its really neat main feature Vince Ferrareses clothespin mod shown sketch instant adjustability clamping force Just slide fulcrum pin Vince used /s music wire fulcrum other things easily cut aluminum tubing examplewould work well /s inch tubing doesnt give wide enough jaw opening try o 78 Although will have cooled considerably time gets writing report Eleventh Annual Symposium National Free Flight Society hot off presses something new has added Free Flight Hall Fame Having oneupped AMA Hall Fame appoint ments starters NFFS chose reaffirm appointments made AMA Free Flighters add its saluta tion Future appointments will continue identify celebrate enshrine special individuals life work has formative lasting way Free Flight Model Aviation Following introductions NFFS Exec Direc Hardy Brodersen Editor Bob Dodds papers section thats followed Ten Models Year section 10 papers Id like present penetrating indepth analysis fact havent read yet Ill just comment briefly few caught eye Bruce Carmichael has work ing airfoil selection RPV flown atmosphere Mars presents analysis little-known work Dr Werner Pfenninger low-Reynoldsnumber airfoils Pfenninger employed succession trippers turbulators thin cambered airfoil obtained characteristics would hard beat Nordic A-2 glider glide would unusually fast also unusually flat sinking speed incredibly low Peter Allnut presents some wind-tunnel flight-test results new computerdesigned airfoils Thats sort like re ferring Thorn Birds typewriterwritten book airfoils look mite strange to Mother Nature apparently Earl Bailey presents some wind-tunneltest results series Top Flite wood props seems model airplane props arent efficient Durands classic 1923 tests would lead us believe John Worth points out thatfun seems Missing Ingredient modern competition Free Flight John points out high-technology high-perform ance gassies tend turn off potential participants sport indicates flying slow easy often road increased participation Its hard deny RC FF Oldtimer RC Soaring Peanut Scale growing participation AMA FAI Power events growth goal John probably right put practice Although low-and-slow free flight events spectator likely see sound fury AMA Gas events December1978 119 Please send me........ copies new fourth edition Radio Control Buyers Guide Enclosed $600 copy ordered $525 Guide plus $75 postage & handling Total Enclosed ___________ anada City State ZlP Return Boynton & Assoc Clifton House Clifton VA 22024 SAFE FLYING IS NO ACCIDENT ULL-SIZE PLA________ No 239Blue Birds$375 RC Ken Willards marvelous formation plane 4-chan 10power No 240Misfit$400 RC Randolphs classy shoulder wing sport job 4-chan 15power No 241Ace-Dart$175 RC Scale-up Ehling Dart Ace pulse rudder Pee Wee 02 No 242Dakota$275 FF Scale-up famous Dakota bipe great fun 049 power No243Super Burp$150 CL Record jet Speed model 1/2-size plan full-size details Kioud King 15-19 RC OldTimor Free Flight based upon 1938 record breaker FF 0 Wiley Post Biplane Petite durable scale design either rubber tail wagger pulse rudder GollyGaeWhiz Dan Rutherfords simple Half-A powered combat job turns dime .. $150 Gremlin Sturdy aerobatic RC biplane flies well 35s up SOs $300 4-Bits 40-powered RC 500 Club Racer has winning ways Good sport too $400 Semi-Pro Contest-winning HL glider has pop-up tail dethermalizer$100 Hall-Korda rubber John Oldenkamps 1/2-size all-balsa OldTimer 178 Gee Bee Medal Y 40-powered REZ stand-off scale great old-time racers $500 Callisto superb Standard Class RC sailplane also took Nets first $400 Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 QuickSilver RC 1/2A Pylon Racer incorporates latest techniques.. $200 comedian RC fun-fly aerobatic biplane good looker 40 60 $400 Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 Tercel Keith Trostles 1/2A CL Stunt ship flies excellent pattern$200 MidgetMustang CL 1975-1976 NatswinningGoodyearbyJohn Ballard $200 Nothing Fancy RC biplane 35 engines pretty handles baaufully..$825 Simitar RC spectacular flying wing 15 nose-mounted tractor $3 00 Dennyplene RC version famed cabin model kit 1937 1 9-25$400 zonker RC canard has pattern capebility 40 power 0 Country Boy FFbyJim Clem isthoroughbred/09/ 51 1/2A. $300 Bed Check Charlie RC Scale model Russian PT trainer 09115 . $300 Answer RC FF cabin 02 sized Replica Old-Timer Seville RC Sport low-wing sailplane 60 wing has excellent performance$350 Vintage 11 RC Antique type old-time open fuse construction 60$475 Chipmunk RC Scale winner 1976 World Championships Nets$9 00 Stiletto CL stunt model McDonald winner 1976 FAI World Champs$375 Vol ubre FF rubber-powered Wakefield Bob White Great winner$275 Natz Biplane RC aerobatic scale job takes 40/50 built-in muffler$475 Sportater RC deBolt wing choice aerobatics/racing. $375 Fokker 0-VIII RC 45 50 Two sheets 2-1/2 scale -$900 Hot Rock RC aerobatics 19-40 engines Simple tail-dragger$350 Air Camper FF Pientenpol 1/2A Charming old-timer 2-sheets $300 Livesey DL 5 RC English homebuilt 3-chan. 15s Exotic easy Good flier $500 Miss America RC Antique famous historic model 2 big sheets 35 40 $925 Eliminator II CL Class Speed asymmetric design record job$175 Windlord Ken Bates RC flying wing sailplane highly competitive$550 Mustang Al Meyers lovely CL P-Si 36 46 Sport Scale 5tunt$400 RocketeerA Al Lidbergs 02 FF replica famed 5choenbrun old-timer$200 RC Fairchild Ranger 24 AMA Sport Scale 2 big sheets$1000 FF Fokker universal Jumbo-sized rubber scale model Bill Noonan$500 CL Bobcat John Kilsdonks Slow Ratlatest state art . $150 RC Insider indoorsand out Electric power pulse rudder$300 Winterhawk RC standard class sailplane rugged escellent soarer$350 Fly Baby CL Scala model Pete Bowers homebuiltfor 35-40 RC engine$375 Horsefly RC sport job Ace pulse rudderless than$l00with radio$250 Ole Reliable RC 70 version 38 oldtimer REM controls 19-25$426 Spitfire CL profile 2 versionsbuilt-up solid stunter 35$450 AG-i Agrivation RC 4-chan 25-40 realistic trike gear low wing$400 Fighters Two CL 1/2A balsa profiles Japanese Nate us P-26 Peashooter$200 Solution RC competitive pattern deBolt 40 power$475 AR-25 RC tiny high performance sailplane 2 channelswinglets$276 Tiny white Mouse CL 1/2A powered mouse racer frequent big time winner$150 Ms Peach Embryo rubber endurance Bill Warner Nets winner$150 Sport 40 RC 4-chan. trike-gear shoulder-wing 40$425 Typhoon CL profile 15 WW II fighter Paul Scheef$300 Mentor FF Very nice 40 towliner small fields$300 Dasher RC combo racing pattern characteristics 15 25$300 Stits Jr CL worlds smallest plane good flier 25 35$300 Wildcat RC Ace pulse rudder 02 Grumman fighter Bowers Srull$175 Circle numbers plans wish order 103 104 118 121 123124125131134136146149155159165166 168169177178181183184189192193194195 198203205206207212213215216217218219 220221222223224225226227228229230231 232 233 234 235 236 237 238 239 240 241 242 243 Enclosed S NAME STREET CITY STATE ZIP Price includes first-Class postage Send Check money order payable Mode/Aviation AMA 815 Fifteenth St. NW Washington DC 20005 S know others exist wouldnt much good tell soundand-fury advocates should go off fly oldtimers peanut scale Ten Models Year section has usual stories about develop ment of models plus excep tionally well prepared drawings Joe McCarthy price $825 including postage seems like lot until consider much pure free flight get $825 worth model magazines nowa days Bob Meuser 4200 Gregory St. Oak land CA 94619 ADVERTISERS INDEX Ace Radio Control99 Andrews Aircraft Model Co101 Richard C Barron104 Bavarian Precision Products Co 8 Boynton Associates119 Coverite5 Cox Hobbies Inc ide Front Cover DGM Industries112 Du-Bro Products115 EAA-Experimental Aircraft Assoc E K-Products7 Flyline Models98 Fli Shirts116 Fox Mfg Company7 Fusite117 Grish Brothers103 Paul K Guillow Inc111 K&B Mfg Company3 Kraft Southwestern Inc110 Kustom Kraftsmanship114 Midwest Model Products6 105 Modernistic Models114 Morrison Repla-Tech110 Original Mitt102 Packard Associates100 Pactra Industries106 Peck-Polymers112 Pica Enterprises97 113 Progress Mfg Company8 Sig Mfg Company1 Sterling Models Inc9 Tatone Products Inc9 Westport International Inc107 Williams Brothers109 World EnginesBack Cover 120 Model Aviation No103 No 104 No 118 No121 No 123 No 124 No 126 No131 No134 No 136 No 148 No 149 No155 No159 No 155 No 156 No 168 No 169 No177 No 178 No 181 No 183 No184 No189 No192 No193 No 194 No 195 No198 No 203 No 205 No 206 No 207 No212 No213 No215 No216 No217 No218 No219 No220 No 221 No 222 No 223 No224 No 225 No 226 No 227 No 228 No 229 No 230 No231 No 232 No233 No234 No235 No236 No 237 No238 Please print carefully Full-Size Plan List Available complete listing plans pre viously published mag azine through No 235 may obtained free charge writing enclose stamped self-addressed business-size envelope Model Aviation 815 15th St NW Washington DC 20005
Edition: Model Aviation - 1978/12
Page Numbers: 56, 57, 116, 117, 119, 120
Free Flight. Du ration Bob Meu ser MAGNUM Although semantic im plications small magnum earth shattering Vic Cunnyngham Jr son Jeff have built several magnums various sizes during past four years design scientific models Start Galaxie size suit fancy Add rib bay wing tip Lengthen body stabilizer chord Turn rudder around mount hind stab Fuselage easy-to-build uniform-width construction cheeks added just behind firewall Everything built flat no intentional warps geodetic construction ensures wont unintentional ones either Vic says flies right off draw ing board didnt mention lands Venerable S-Hook Re-Re-Revisited First off lets get nomenclature straight term S-hook has two rather different meanings Free Flight parlance refers situation rubber motor connected directly propshaft Looking propshaft rear S-hook looks like 5 See article No Noncents July 1976 ModAv supposed keep rubber centered doesnt thats getting ahead 71r7- ~7 ==J~= N-, \ 7 IIII mcsm Vc Cunnpt8ham Jr Vic Cunnyngham son Jeff have building Magnums several sizes far past four years story another usage S-hook means whatever sort gadget used connect rubber propshaft Such gad get necessary kind model beefier Peanut Scale Indoor model wound rubber motor discon nected prop olden times simply piece music wire bent look like 5 IZx~ber Lctnd rizznJ - TZz wire tuiin variation old clothspin trick almost filed under dumb ideas before Bob tried biggest advantage Vince Ferrareses pin instant adjustability clamping force 56 Model Aviation P-ju outdoor rubber rapidly increasing popularity Bobs Spookweight 30 grams out rubber Borrows few indoor construction techniques torque controlled auto-stab Dolores Snyder displays little Asteroid rub ber-powered model George Perryman design early Thirtiesbefore George began de signing funny looking ships Roselle plc Having some standard time proven S-hooks fail job re cently gave cause reconsider problem has come up motors considerably longer hook-to-hook distance new made-in-America rubber youre still flying Wakefield Pirelli perhaps dont have problem result has Mulvihill Oldtimer stickntissue fuselages have suffered internal hemorrhages S-hook got side ways George Xenakis has using scheme connecting motor propshaft looks should work under imaginable conditions fact does design comes originally Frank Parmenter sketch shows have tape-controlled milling machine basement its cinch limited drills files hacksaws lots cussin still possible cross pin removable necessary number strands twice odd number 10 14 18 etc num ber strands twice number say multiple 412 16 20 etc cross pin can permanently tached number strands twice neither odd nor number dont want hear about Pirelli Rubber mixed emotions present report seems abun dantly clear both Fred Pearces tests reports others have used stuff both indoor outdoor competition activities new Pirelli rubber some 5 10% better best rubber have previously access Thats good part bad parts cant get could b couldnt afford writing mid-August no steady US source has developed neighbors uncle has nightwatchman Pirelli works Milano Quoted prices high $30 pound begins make RC seem cheap Fred tests small quantities rubber5 grams soby stretching rubber nearly breaking point plot ting tensile force against stretch distance force relaxed Chris Mat suno tests full-size motors winding Fred points out Chris compare notes frequently stretch tests winding tests give virtually same results specific energy energy per unit mass new Pirelli 3860 ft lb/lb Thats way saying quantity rubber will release enough energy raise itself altitude 3860 ft best energy storage figure Ive encountered previous best Continued page 116 Music wire dip % od frciss tt4e 1 rivet jl C 3 32 7 lb ft-Ib/W 3 ( make S-hook just bend piece wire Right use connect prop shaft some models might find need George Xenakis Good luck text 242220iS 4 12 JO 8 6 4 2 0 fr77{Lati 7jPi-di 77A1 T5FAI / II 78 PirelLiI / l70 II I I/ 200400oO0090400 Stretdt in6u6 Fred Pearce tests small quantities rubber stretching nearly breaking point plotting tensile force against stretch distance force relaxed Graph shows typical results 77 1A1 78 FAT 7 Filatt 72 PirelLi December1978 57 3 r 3 140IZO AMA WINGS ME AND MY RC 78 NATS 4 COLOR4 COLOR PERMISSION FROM AMA LUSIVE RIGHTSWhile Last FROM ROYAL CROWN COLA Green color Pattern Pylon Soaring Chopper Free Flight RC Widow Heavenly Sport RC Cherub Ukie Speed Rat Racer Combat Aerobatics choice white 50/50% polyester shirt navy trim $550 Postage FLI CAP 4 Color AMA Wines 5 M L Size Adjustable $550 Postage custom work clubsspecial events businesses Any size color print shirts jackets caps Information sent request FLI * HIRT 5132 DEL REY LAS VEGAS NEVADA 89102 proper balance achieved flying surfaces may glued place Use slow hardening epoxy glue cement wing stab place advisable dowel pin wing fuselage done drilling three 3/16 holes through center section wing about inch fuselage whereupon drilled holes fitted hard wood dowel pins glued place point wing stabilizer filleted fuselage Fiberglass recommended material rear cap strip added top rear fuselage contoured shape fuselage Fabricate rear engine mounting bracket bracket constructed 1/4 3-16 aluminum stock airfoiled shape bracket can mounted ways however suggested methods follows Drill mount ing bracket positions denoted plans 6-32 clearance drill also drill fuselage least center po sition way through bot tom point blind mounting nut pulled place hole has drilled way through body body must hollowed proper place accommodate blind nuts second method drill tap bracket two 6-32 machine screws body drilled way through clearance drill whereupon machine screws run up through fuselage thread bracket second method used record setting air plane equivalent strength method bit easier install pipe retaining clip formed 020 steel stock stainless steel stock Stain less steel stock preferred material because will rust dur able clip fastened bracket 4-40 machine screw Sand entire airplane smooth Fill nicks cracks holes filler resand have preferred finishing technique use provided fuel-proof finish record airplane two coats Hobbypoxy clear sanded between coats two coats Super Poxy color first coat being brushed sanded last coat just sprayed oni am sure would work very well After takeoff get pylon soon pos Flying fuel speed sible fly airplane near records have set 50% nitromethane perfect groove possible Jets much 50% propylene oxide although some susceptible extreme loss others have success varying speed due deviating perfect nitro-propyl ratio slightly possibly suit groove case propeller weather conditions given day aircraft number 46 081 dia drill size Good luck Super Burp metering jet seems work best have questions feel free contact series 1 head number 42 0935 Mike Langlois 2408 W Cornwallis dia series 2 head Drill 12 metering Dr Greensboro NC 27408 jets #42 thru #53 Larger metering jets can made Dooling needle valve fittings F F Duration/Meuser similar brass fittings long continued page 57 seat properly spray bar ring used seal Only trial error will determine metering jet size will work best particular engine airplane combina tion Make first flight attempts richest metering jet will run ship hand held ground engine cuts off after release try next size smaller metering jet until keeps run ning Usually rule upright engine design richer run faster go Uprights usually lean out start finish although uni flow fuel tank Super Burp tends minimize change 100% rule engine/airplane combina tion try leaning yours down metering jet after have run rich can start engine use truck tire pump source air Any other source compressed air will work equally well buzz box conjunction probe used supply spark needed ignite fuel-air mixture entering combustion chamber during ignition probe use electric stove oven element cut end will protrude approximate spark plug location tail pipe used element can ob tained local used furniture appliance store flying airplane make sure line taut takeoff ready pull airplane pitmans hand releases airplane can skidded off use dolly wish use properly designed dolly takeoff 116 Model Aviation Pirelli 1964 material gave 3520 whereas average Pirelli near 3300 Current FAT Supply rubber run ning 3545 excellent average new Pirelli confused Filati 1977 batch Filati tested out 1570 graph shows results some Freds recent tests Note fall-off tension new Pirelli grad ual other kinds rubber Fred points out too-rapid fall-off can treacherous torque falls off too rapidly model unable readjust its climb attitude rapidly enough result ing mushing stall shortly after launching test data shown meas ured during mid-1978 except 1972 Pirelli measured mid1977 Note 1977 FAT rubber slightly harder 1978 FAI rub ber specific energy about same Fred thinks rubber actually about same man ufactured difference simply typical effect aging Test curves 1977 material made during 1977 look about like 1978 test curves 1978 material Anybody know can get some 1977 Filati Id like have some give friends CO-2 Duration New Indoor Class Bob Bailey England writing eromodel ler magazine tells about attempts half-dozen modelers see what could such models best far 642 flight Ian Dowsett model spans 44 inches Construction light course light Wing diagonal-rib Easy B construction 1/16 sq sliced ribs 1/16 X / leading trailing edges tapering 1/16 sq Stab 1/16 sq measures 4 X 18 smallish Fuselage 1/32-sheet box rub ber 1/32 sheet Max wing chord 61/8 tips tapered 4 All-up weight 26 grams plastic 7 inch Super Sleek Streak prop used giving motor run about 4 minutes rest glide Bailey sug gests prop develop ment effort should placed sus pect well soon seeing 9- 10-inch Pennyplane-style props sized engine puts out its last grunt just model touches down Telco isor British put Telco aretaking interest possibility trophy annual event wonder theyll limit event own brand stuff commercially available stuff just what Given free hand can see possibly develop highly sophisticated thing experts building own potentially danger ous hardware next thing know well asking Say whatever happened Indoor CO-2 Seems like sort dumb event wonder theyll accept proxyflown models CO-2 Duration New Outdoor Class 1978 British Nats saw first running Scramble event CO-2 duration models idea scramble origi nated Australia Clearly continued ex posure inverted environment made bit light head Anyhow idea get much total flight duration given time period can 'max~ number flights limited laws nature human endurance Contestants re quired retrieve foot Nats CO-2 Scramble halfhour time limit held during mid-afternoon heat exceptionally hot Nats Phil Ball won nine flights totaling 1042 Dihedral Joints Dihedral joints always pain about best can say methods making some less painful others methodone less painful ones have used several models recent ly has worked out rather well Say building model having flat center panel tip dihedral Build center section first canting end ribs inward course glue dry prop up proper dihedral angle Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 mare RPM greater power longer life replacing plug popular Y2-A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VDC charger recommended build tip right onto after has set spell prop whole thing up proper angle build other tip could start tip prop up add center panel forth little thought can arrange things minimum amount wing sticking up minimum length time somewhat vulnerable damage method works poly hedral too course Ribs dihedral joints tend warp due tension covering should thicker harder material regular ribs Leading Edges leading-edge conD FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VOC Stingerat big savings - championship products world modelers --DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 struction shown sketch used Jim Jones little complicated sticking piece quarter-square has lot offer tee-section basically lot stiffer conventional leading edge same weight way Jim does leading edge automat ically comes out rather accurately formed since leading edge shape prob December1978 117 NEW 1/2-A plugs Join Team ably important feature air foil thats important Furthermore stem T well anchored ribs wrinkles covering ribs join leading edge unlikely idea strip exactly right width begin about left sanding until notches disappear An accurate drawing leading edge regionperhaps two three times life size smaller modelsis starting point design leading edge way want cut strips suit take easier route designing leading edge accom modate stock wood sizes Variation No 437 Common House hold Clothespin about file under Dumb Ideas until tried Its really neat main feature Vince Ferrareses clothespin mod shown sketch instant adjustability clamping force Just slide fulcrum pin Vince used /s music wire fulcrum other things easily cut aluminum tubing examplewould work well /s inch tubing doesnt give wide enough jaw opening try o 78 Although will have cooled considerably time gets writing report Eleventh Annual Symposium National Free Flight Society hot off presses something new has added Free Flight Hall Fame Having oneupped AMA Hall Fame appoint ments starters NFFS chose reaffirm appointments made AMA Free Flighters add its saluta tion Future appointments will continue identify celebrate enshrine special individuals life work has formative lasting way Free Flight Model Aviation Following introductions NFFS Exec Direc Hardy Brodersen Editor Bob Dodds papers section thats followed Ten Models Year section 10 papers Id like present penetrating indepth analysis fact havent read yet Ill just comment briefly few caught eye Bruce Carmichael has work ing airfoil selection RPV flown atmosphere Mars presents analysis little-known work Dr Werner Pfenninger low-Reynoldsnumber airfoils Pfenninger employed succession trippers turbulators thin cambered airfoil obtained characteristics would hard beat Nordic A-2 glider glide would unusually fast also unusually flat sinking speed incredibly low Peter Allnut presents some wind-tunnel flight-test results new computerdesigned airfoils Thats sort like re ferring Thorn Birds typewriterwritten book airfoils look mite strange to Mother Nature apparently Earl Bailey presents some wind-tunneltest results series Top Flite wood props seems model airplane props arent efficient Durands classic 1923 tests would lead us believe John Worth points out thatfun seems Missing Ingredient modern competition Free Flight John points out high-technology high-perform ance gassies tend turn off potential participants sport indicates flying slow easy often road increased participation Its hard deny RC FF Oldtimer RC Soaring Peanut Scale growing participation AMA FAI Power events growth goal John probably right put practice Although low-and-slow free flight events spectator likely see sound fury AMA Gas events December1978 119 Please send me........ copies new fourth edition Radio Control Buyers Guide Enclosed $600 copy ordered $525 Guide plus $75 postage & handling Total Enclosed ___________ anada City State ZlP Return Boynton & Assoc Clifton House Clifton VA 22024 SAFE FLYING IS NO ACCIDENT ULL-SIZE PLA________ No 239Blue Birds$375 RC Ken Willards marvelous formation plane 4-chan 10power No 240Misfit$400 RC Randolphs classy shoulder wing sport job 4-chan 15power No 241Ace-Dart$175 RC Scale-up Ehling Dart Ace pulse rudder Pee Wee 02 No 242Dakota$275 FF Scale-up famous Dakota bipe great fun 049 power No243Super Burp$150 CL Record jet Speed model 1/2-size plan full-size details Kioud King 15-19 RC OldTimor Free Flight based upon 1938 record breaker FF 0 Wiley Post Biplane Petite durable scale design either rubber tail wagger pulse rudder GollyGaeWhiz Dan Rutherfords simple Half-A powered combat job turns dime .. $150 Gremlin Sturdy aerobatic RC biplane flies well 35s up SOs $300 4-Bits 40-powered RC 500 Club Racer has winning ways Good sport too $400 Semi-Pro Contest-winning HL glider has pop-up tail dethermalizer$100 Hall-Korda rubber John Oldenkamps 1/2-size all-balsa OldTimer 178 Gee Bee Medal Y 40-powered REZ stand-off scale great old-time racers $500 Callisto superb Standard Class RC sailplane also took Nets first $400 Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 QuickSilver RC 1/2A Pylon Racer incorporates latest techniques.. $200 comedian RC fun-fly aerobatic biplane good looker 40 60 $400 Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 Tercel Keith Trostles 1/2A CL Stunt ship flies excellent pattern$200 MidgetMustang CL 1975-1976 NatswinningGoodyearbyJohn Ballard $200 Nothing Fancy RC biplane 35 engines pretty handles baaufully..$825 Simitar RC spectacular flying wing 15 nose-mounted tractor $3 00 Dennyplene RC version famed cabin model kit 1937 1 9-25$400 zonker RC canard has pattern capebility 40 power 0 Country Boy FFbyJim Clem isthoroughbred/09/ 51 1/2A. $300 Bed Check Charlie RC Scale model Russian PT trainer 09115 . $300 Answer RC FF cabin 02 sized Replica Old-Timer Seville RC Sport low-wing sailplane 60 wing has excellent performance$350 Vintage 11 RC Antique type old-time open fuse construction 60$475 Chipmunk RC Scale winner 1976 World Championships Nets$9 00 Stiletto CL stunt model McDonald winner 1976 FAI World Champs$375 Vol ubre FF rubber-powered Wakefield Bob White Great winner$275 Natz Biplane RC aerobatic scale job takes 40/50 built-in muffler$475 Sportater RC deBolt wing choice aerobatics/racing. $375 Fokker 0-VIII RC 45 50 Two sheets 2-1/2 scale -$900 Hot Rock RC aerobatics 19-40 engines Simple tail-dragger$350 Air Camper FF Pientenpol 1/2A Charming old-timer 2-sheets $300 Livesey DL 5 RC English homebuilt 3-chan. 15s Exotic easy Good flier $500 Miss America RC Antique famous historic model 2 big sheets 35 40 $925 Eliminator II CL Class Speed asymmetric design record job$175 Windlord Ken Bates RC flying wing sailplane highly competitive$550 Mustang Al Meyers lovely CL P-Si 36 46 Sport Scale 5tunt$400 RocketeerA Al Lidbergs 02 FF replica famed 5choenbrun old-timer$200 RC Fairchild Ranger 24 AMA Sport Scale 2 big sheets$1000 FF Fokker universal Jumbo-sized rubber scale model Bill Noonan$500 CL Bobcat John Kilsdonks Slow Ratlatest state art . $150 RC Insider indoorsand out Electric power pulse rudder$300 Winterhawk RC standard class sailplane rugged escellent soarer$350 Fly Baby CL Scala model Pete Bowers homebuiltfor 35-40 RC engine$375 Horsefly RC sport job Ace pulse rudderless than$l00with radio$250 Ole Reliable RC 70 version 38 oldtimer REM controls 19-25$426 Spitfire CL profile 2 versionsbuilt-up solid stunter 35$450 AG-i Agrivation RC 4-chan 25-40 realistic trike gear low wing$400 Fighters Two CL 1/2A balsa profiles Japanese Nate us P-26 Peashooter$200 Solution RC competitive pattern deBolt 40 power$475 AR-25 RC tiny high performance sailplane 2 channelswinglets$276 Tiny white Mouse CL 1/2A powered mouse racer frequent big time winner$150 Ms Peach Embryo rubber endurance Bill Warner Nets winner$150 Sport 40 RC 4-chan. trike-gear shoulder-wing 40$425 Typhoon CL profile 15 WW II fighter Paul Scheef$300 Mentor FF Very nice 40 towliner small fields$300 Dasher RC combo racing pattern characteristics 15 25$300 Stits Jr CL worlds smallest plane good flier 25 35$300 Wildcat RC Ace pulse rudder 02 Grumman fighter Bowers Srull$175 Circle numbers plans wish order 103 104 118 121 123124125131134136146149155159165166 168169177178181183184189192193194195 198203205206207212213215216217218219 220221222223224225226227228229230231 232 233 234 235 236 237 238 239 240 241 242 243 Enclosed S NAME STREET CITY STATE ZIP Price includes first-Class postage Send Check money order payable Mode/Aviation AMA 815 Fifteenth St. NW Washington DC 20005 S know others exist wouldnt much good tell soundand-fury advocates should go off fly oldtimers peanut scale Ten Models Year section has usual stories about develop ment of models plus excep tionally well prepared drawings Joe McCarthy price $825 including postage seems like lot until consider much pure free flight get $825 worth model magazines nowa days Bob Meuser 4200 Gregory St. Oak land CA 94619 ADVERTISERS INDEX Ace Radio Control99 Andrews Aircraft Model Co101 Richard C Barron104 Bavarian Precision Products Co 8 Boynton Associates119 Coverite5 Cox Hobbies Inc ide Front Cover DGM Industries112 Du-Bro Products115 EAA-Experimental Aircraft Assoc E K-Products7 Flyline Models98 Fli Shirts116 Fox Mfg Company7 Fusite117 Grish Brothers103 Paul K Guillow Inc111 K&B Mfg Company3 Kraft Southwestern Inc110 Kustom Kraftsmanship114 Midwest Model Products6 105 Modernistic Models114 Morrison Repla-Tech110 Original Mitt102 Packard Associates100 Pactra Industries106 Peck-Polymers112 Pica Enterprises97 113 Progress Mfg Company8 Sig Mfg Company1 Sterling Models Inc9 Tatone Products Inc9 Westport International Inc107 Williams Brothers109 World EnginesBack Cover 120 Model Aviation No103 No 104 No 118 No121 No 123 No 124 No 126 No131 No134 No 136 No 148 No 149 No155 No159 No 155 No 156 No 168 No 169 No177 No 178 No 181 No 183 No184 No189 No192 No193 No 194 No 195 No198 No 203 No 205 No 206 No 207 No212 No213 No215 No216 No217 No218 No219 No220 No 221 No 222 No 223 No224 No 225 No 226 No 227 No 228 No 229 No 230 No231 No 232 No233 No234 No235 No236 No 237 No238 Please print carefully Full-Size Plan List Available complete listing plans pre viously published mag azine through No 235 may obtained free charge writing enclose stamped self-addressed business-size envelope Model Aviation 815 15th St NW Washington DC 20005
Edition: Model Aviation - 1978/12
Page Numbers: 56, 57, 116, 117, 119, 120
Free Flight. Du ration Bob Meu ser MAGNUM Although semantic im plications small magnum earth shattering Vic Cunnyngham Jr son Jeff have built several magnums various sizes during past four years design scientific models Start Galaxie size suit fancy Add rib bay wing tip Lengthen body stabilizer chord Turn rudder around mount hind stab Fuselage easy-to-build uniform-width construction cheeks added just behind firewall Everything built flat no intentional warps geodetic construction ensures wont unintentional ones either Vic says flies right off draw ing board didnt mention lands Venerable S-Hook Re-Re-Revisited First off lets get nomenclature straight term S-hook has two rather different meanings Free Flight parlance refers situation rubber motor connected directly propshaft Looking propshaft rear S-hook looks like 5 See article No Noncents July 1976 ModAv supposed keep rubber centered doesnt thats getting ahead 71r7- ~7 ==J~= N-, \ 7 IIII mcsm Vc Cunnpt8ham Jr Vic Cunnyngham son Jeff have building Magnums several sizes far past four years story another usage S-hook means whatever sort gadget used connect rubber propshaft Such gad get necessary kind model beefier Peanut Scale Indoor model wound rubber motor discon nected prop olden times simply piece music wire bent look like 5 IZx~ber Lctnd rizznJ - TZz wire tuiin variation old clothspin trick almost filed under dumb ideas before Bob tried biggest advantage Vince Ferrareses pin instant adjustability clamping force 56 Model Aviation P-ju outdoor rubber rapidly increasing popularity Bobs Spookweight 30 grams out rubber Borrows few indoor construction techniques torque controlled auto-stab Dolores Snyder displays little Asteroid rub ber-powered model George Perryman design early Thirtiesbefore George began de signing funny looking ships Roselle plc Having some standard time proven S-hooks fail job re cently gave cause reconsider problem has come up motors considerably longer hook-to-hook distance new made-in-America rubber youre still flying Wakefield Pirelli perhaps dont have problem result has Mulvihill Oldtimer stickntissue fuselages have suffered internal hemorrhages S-hook got side ways George Xenakis has using scheme connecting motor propshaft looks should work under imaginable conditions fact does design comes originally Frank Parmenter sketch shows have tape-controlled milling machine basement its cinch limited drills files hacksaws lots cussin still possible cross pin removable necessary number strands twice odd number 10 14 18 etc num ber strands twice number say multiple 412 16 20 etc cross pin can permanently tached number strands twice neither odd nor number dont want hear about Pirelli Rubber mixed emotions present report seems abun dantly clear both Fred Pearces tests reports others have used stuff both indoor outdoor competition activities new Pirelli rubber some 5 10% better best rubber have previously access Thats good part bad parts cant get could b couldnt afford writing mid-August no steady US source has developed neighbors uncle has nightwatchman Pirelli works Milano Quoted prices high $30 pound begins make RC seem cheap Fred tests small quantities rubber5 grams soby stretching rubber nearly breaking point plot ting tensile force against stretch distance force relaxed Chris Mat suno tests full-size motors winding Fred points out Chris compare notes frequently stretch tests winding tests give virtually same results specific energy energy per unit mass new Pirelli 3860 ft lb/lb Thats way saying quantity rubber will release enough energy raise itself altitude 3860 ft best energy storage figure Ive encountered previous best Continued page 116 Music wire dip % od frciss tt4e 1 rivet jl C 3 32 7 lb ft-Ib/W 3 ( make S-hook just bend piece wire Right use connect prop shaft some models might find need George Xenakis Good luck text 242220iS 4 12 JO 8 6 4 2 0 fr77{Lati 7jPi-di 77A1 T5FAI / II 78 PirelLiI / l70 II I I/ 200400oO0090400 Stretdt in6u6 Fred Pearce tests small quantities rubber stretching nearly breaking point plotting tensile force against stretch distance force relaxed Graph shows typical results 77 1A1 78 FAT 7 Filatt 72 PirelLi December1978 57 3 r 3 140IZO AMA WINGS ME AND MY RC 78 NATS 4 COLOR4 COLOR PERMISSION FROM AMA LUSIVE RIGHTSWhile Last FROM ROYAL CROWN COLA Green color Pattern Pylon Soaring Chopper Free Flight RC Widow Heavenly Sport RC Cherub Ukie Speed Rat Racer Combat Aerobatics choice white 50/50% polyester shirt navy trim $550 Postage FLI CAP 4 Color AMA Wines 5 M L Size Adjustable $550 Postage custom work clubsspecial events businesses Any size color print shirts jackets caps Information sent request FLI * HIRT 5132 DEL REY LAS VEGAS NEVADA 89102 proper balance achieved flying surfaces may glued place Use slow hardening epoxy glue cement wing stab place advisable dowel pin wing fuselage done drilling three 3/16 holes through center section wing about inch fuselage whereupon drilled holes fitted hard wood dowel pins glued place point wing stabilizer filleted fuselage Fiberglass recommended material rear cap strip added top rear fuselage contoured shape fuselage Fabricate rear engine mounting bracket bracket constructed 1/4 3-16 aluminum stock airfoiled shape bracket can mounted ways however suggested methods follows Drill mount ing bracket positions denoted plans 6-32 clearance drill also drill fuselage least center po sition way through bot tom point blind mounting nut pulled place hole has drilled way through body body must hollowed proper place accommodate blind nuts second method drill tap bracket two 6-32 machine screws body drilled way through clearance drill whereupon machine screws run up through fuselage thread bracket second method used record setting air plane equivalent strength method bit easier install pipe retaining clip formed 020 steel stock stainless steel stock Stain less steel stock preferred material because will rust dur able clip fastened bracket 4-40 machine screw Sand entire airplane smooth Fill nicks cracks holes filler resand have preferred finishing technique use provided fuel-proof finish record airplane two coats Hobbypoxy clear sanded between coats two coats Super Poxy color first coat being brushed sanded last coat just sprayed oni am sure would work very well After takeoff get pylon soon pos Flying fuel speed sible fly airplane near records have set 50% nitromethane perfect groove possible Jets much 50% propylene oxide although some susceptible extreme loss others have success varying speed due deviating perfect nitro-propyl ratio slightly possibly suit groove case propeller weather conditions given day aircraft number 46 081 dia drill size Good luck Super Burp metering jet seems work best have questions feel free contact series 1 head number 42 0935 Mike Langlois 2408 W Cornwallis dia series 2 head Drill 12 metering Dr Greensboro NC 27408 jets #42 thru #53 Larger metering jets can made Dooling needle valve fittings F F Duration/Meuser similar brass fittings long continued page 57 seat properly spray bar ring used seal Only trial error will determine metering jet size will work best particular engine airplane combina tion Make first flight attempts richest metering jet will run ship hand held ground engine cuts off after release try next size smaller metering jet until keeps run ning Usually rule upright engine design richer run faster go Uprights usually lean out start finish although uni flow fuel tank Super Burp tends minimize change 100% rule engine/airplane combina tion try leaning yours down metering jet after have run rich can start engine use truck tire pump source air Any other source compressed air will work equally well buzz box conjunction probe used supply spark needed ignite fuel-air mixture entering combustion chamber during ignition probe use electric stove oven element cut end will protrude approximate spark plug location tail pipe used element can ob tained local used furniture appliance store flying airplane make sure line taut takeoff ready pull airplane pitmans hand releases airplane can skidded off use dolly wish use properly designed dolly takeoff 116 Model Aviation Pirelli 1964 material gave 3520 whereas average Pirelli near 3300 Current FAT Supply rubber run ning 3545 excellent average new Pirelli confused Filati 1977 batch Filati tested out 1570 graph shows results some Freds recent tests Note fall-off tension new Pirelli grad ual other kinds rubber Fred points out too-rapid fall-off can treacherous torque falls off too rapidly model unable readjust its climb attitude rapidly enough result ing mushing stall shortly after launching test data shown meas ured during mid-1978 except 1972 Pirelli measured mid1977 Note 1977 FAT rubber slightly harder 1978 FAI rub ber specific energy about same Fred thinks rubber actually about same man ufactured difference simply typical effect aging Test curves 1977 material made during 1977 look about like 1978 test curves 1978 material Anybody know can get some 1977 Filati Id like have some give friends CO-2 Duration New Indoor Class Bob Bailey England writing eromodel ler magazine tells about attempts half-dozen modelers see what could such models best far 642 flight Ian Dowsett model spans 44 inches Construction light course light Wing diagonal-rib Easy B construction 1/16 sq sliced ribs 1/16 X / leading trailing edges tapering 1/16 sq Stab 1/16 sq measures 4 X 18 smallish Fuselage 1/32-sheet box rub ber 1/32 sheet Max wing chord 61/8 tips tapered 4 All-up weight 26 grams plastic 7 inch Super Sleek Streak prop used giving motor run about 4 minutes rest glide Bailey sug gests prop develop ment effort should placed sus pect well soon seeing 9- 10-inch Pennyplane-style props sized engine puts out its last grunt just model touches down Telco isor British put Telco aretaking interest possibility trophy annual event wonder theyll limit event own brand stuff commercially available stuff just what Given free hand can see possibly develop highly sophisticated thing experts building own potentially danger ous hardware next thing know well asking Say whatever happened Indoor CO-2 Seems like sort dumb event wonder theyll accept proxyflown models CO-2 Duration New Outdoor Class 1978 British Nats saw first running Scramble event CO-2 duration models idea scramble origi nated Australia Clearly continued ex posure inverted environment made bit light head Anyhow idea get much total flight duration given time period can 'max~ number flights limited laws nature human endurance Contestants re quired retrieve foot Nats CO-2 Scramble halfhour time limit held during mid-afternoon heat exceptionally hot Nats Phil Ball won nine flights totaling 1042 Dihedral Joints Dihedral joints always pain about best can say methods making some less painful others methodone less painful ones have used several models recent ly has worked out rather well Say building model having flat center panel tip dihedral Build center section first canting end ribs inward course glue dry prop up proper dihedral angle Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 mare RPM greater power longer life replacing plug popular Y2-A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VDC charger recommended build tip right onto after has set spell prop whole thing up proper angle build other tip could start tip prop up add center panel forth little thought can arrange things minimum amount wing sticking up minimum length time somewhat vulnerable damage method works poly hedral too course Ribs dihedral joints tend warp due tension covering should thicker harder material regular ribs Leading Edges leading-edge conD FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VOC Stingerat big savings - championship products world modelers --DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 struction shown sketch used Jim Jones little complicated sticking piece quarter-square has lot offer tee-section basically lot stiffer conventional leading edge same weight way Jim does leading edge automat ically comes out rather accurately formed since leading edge shape prob December1978 117 NEW 1/2-A plugs Join Team ably important feature air foil thats important Furthermore stem T well anchored ribs wrinkles covering ribs join leading edge unlikely idea strip exactly right width begin about left sanding until notches disappear An accurate drawing leading edge regionperhaps two three times life size smaller modelsis starting point design leading edge way want cut strips suit take easier route designing leading edge accom modate stock wood sizes Variation No 437 Common House hold Clothespin about file under Dumb Ideas until tried Its really neat main feature Vince Ferrareses clothespin mod shown sketch instant adjustability clamping force Just slide fulcrum pin Vince used /s music wire fulcrum other things easily cut aluminum tubing examplewould work well /s inch tubing doesnt give wide enough jaw opening try o 78 Although will have cooled considerably time gets writing report Eleventh Annual Symposium National Free Flight Society hot off presses something new has added Free Flight Hall Fame Having oneupped AMA Hall Fame appoint ments starters NFFS chose reaffirm appointments made AMA Free Flighters add its saluta tion Future appointments will continue identify celebrate enshrine special individuals life work has formative lasting way Free Flight Model Aviation Following introductions NFFS Exec Direc Hardy Brodersen Editor Bob Dodds papers section thats followed Ten Models Year section 10 papers Id like present penetrating indepth analysis fact havent read yet Ill just comment briefly few caught eye Bruce Carmichael has work ing airfoil selection RPV flown atmosphere Mars presents analysis little-known work Dr Werner Pfenninger low-Reynoldsnumber airfoils Pfenninger employed succession trippers turbulators thin cambered airfoil obtained characteristics would hard beat Nordic A-2 glider glide would unusually fast also unusually flat sinking speed incredibly low Peter Allnut presents some wind-tunnel flight-test results new computerdesigned airfoils Thats sort like re ferring Thorn Birds typewriterwritten book airfoils look mite strange to Mother Nature apparently Earl Bailey presents some wind-tunneltest results series Top Flite wood props seems model airplane props arent efficient Durands classic 1923 tests would lead us believe John Worth points out thatfun seems Missing Ingredient modern competition Free Flight John points out high-technology high-perform ance gassies tend turn off potential participants sport indicates flying slow easy often road increased participation Its hard deny RC FF Oldtimer RC Soaring Peanut Scale growing participation AMA FAI Power events growth goal John probably right put practice Although low-and-slow free flight events spectator likely see sound fury AMA Gas events December1978 119 Please send me........ copies new fourth edition Radio Control Buyers Guide Enclosed $600 copy ordered $525 Guide plus $75 postage & handling Total Enclosed ___________ anada City State ZlP Return Boynton & Assoc Clifton House Clifton VA 22024 SAFE FLYING IS NO ACCIDENT ULL-SIZE PLA________ No 239Blue Birds$375 RC Ken Willards marvelous formation plane 4-chan 10power No 240Misfit$400 RC Randolphs classy shoulder wing sport job 4-chan 15power No 241Ace-Dart$175 RC Scale-up Ehling Dart Ace pulse rudder Pee Wee 02 No 242Dakota$275 FF Scale-up famous Dakota bipe great fun 049 power No243Super Burp$150 CL Record jet Speed model 1/2-size plan full-size details Kioud King 15-19 RC OldTimor Free Flight based upon 1938 record breaker FF 0 Wiley Post Biplane Petite durable scale design either rubber tail wagger pulse rudder GollyGaeWhiz Dan Rutherfords simple Half-A powered combat job turns dime .. $150 Gremlin Sturdy aerobatic RC biplane flies well 35s up SOs $300 4-Bits 40-powered RC 500 Club Racer has winning ways Good sport too $400 Semi-Pro Contest-winning HL glider has pop-up tail dethermalizer$100 Hall-Korda rubber John Oldenkamps 1/2-size all-balsa OldTimer 178 Gee Bee Medal Y 40-powered REZ stand-off scale great old-time racers $500 Callisto superb Standard Class RC sailplane also took Nets first $400 Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 QuickSilver RC 1/2A Pylon Racer incorporates latest techniques.. $200 comedian RC fun-fly aerobatic biplane good looker 40 60 $400 Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 Tercel Keith Trostles 1/2A CL Stunt ship flies excellent pattern$200 MidgetMustang CL 1975-1976 NatswinningGoodyearbyJohn Ballard $200 Nothing Fancy RC biplane 35 engines pretty handles baaufully..$825 Simitar RC spectacular flying wing 15 nose-mounted tractor $3 00 Dennyplene RC version famed cabin model kit 1937 1 9-25$400 zonker RC canard has pattern capebility 40 power 0 Country Boy FFbyJim Clem isthoroughbred/09/ 51 1/2A. $300 Bed Check Charlie RC Scale model Russian PT trainer 09115 . $300 Answer RC FF cabin 02 sized Replica Old-Timer Seville RC Sport low-wing sailplane 60 wing has excellent performance$350 Vintage 11 RC Antique type old-time open fuse construction 60$475 Chipmunk RC Scale winner 1976 World Championships Nets$9 00 Stiletto CL stunt model McDonald winner 1976 FAI World Champs$375 Vol ubre FF rubber-powered Wakefield Bob White Great winner$275 Natz Biplane RC aerobatic scale job takes 40/50 built-in muffler$475 Sportater RC deBolt wing choice aerobatics/racing. $375 Fokker 0-VIII RC 45 50 Two sheets 2-1/2 scale -$900 Hot Rock RC aerobatics 19-40 engines Simple tail-dragger$350 Air Camper FF Pientenpol 1/2A Charming old-timer 2-sheets $300 Livesey DL 5 RC English homebuilt 3-chan. 15s Exotic easy Good flier $500 Miss America RC Antique famous historic model 2 big sheets 35 40 $925 Eliminator II CL Class Speed asymmetric design record job$175 Windlord Ken Bates RC flying wing sailplane highly competitive$550 Mustang Al Meyers lovely CL P-Si 36 46 Sport Scale 5tunt$400 RocketeerA Al Lidbergs 02 FF replica famed 5choenbrun old-timer$200 RC Fairchild Ranger 24 AMA Sport Scale 2 big sheets$1000 FF Fokker universal Jumbo-sized rubber scale model Bill Noonan$500 CL Bobcat John Kilsdonks Slow Ratlatest state art . $150 RC Insider indoorsand out Electric power pulse rudder$300 Winterhawk RC standard class sailplane rugged escellent soarer$350 Fly Baby CL Scala model Pete Bowers homebuiltfor 35-40 RC engine$375 Horsefly RC sport job Ace pulse rudderless than$l00with radio$250 Ole Reliable RC 70 version 38 oldtimer REM controls 19-25$426 Spitfire CL profile 2 versionsbuilt-up solid stunter 35$450 AG-i Agrivation RC 4-chan 25-40 realistic trike gear low wing$400 Fighters Two CL 1/2A balsa profiles Japanese Nate us P-26 Peashooter$200 Solution RC competitive pattern deBolt 40 power$475 AR-25 RC tiny high performance sailplane 2 channelswinglets$276 Tiny white Mouse CL 1/2A powered mouse racer frequent big time winner$150 Ms Peach Embryo rubber endurance Bill Warner Nets winner$150 Sport 40 RC 4-chan. trike-gear shoulder-wing 40$425 Typhoon CL profile 15 WW II fighter Paul Scheef$300 Mentor FF Very nice 40 towliner small fields$300 Dasher RC combo racing pattern characteristics 15 25$300 Stits Jr CL worlds smallest plane good flier 25 35$300 Wildcat RC Ace pulse rudder 02 Grumman fighter Bowers Srull$175 Circle numbers plans wish order 103 104 118 121 123124125131134136146149155159165166 168169177178181183184189192193194195 198203205206207212213215216217218219 220221222223224225226227228229230231 232 233 234 235 236 237 238 239 240 241 242 243 Enclosed S NAME STREET CITY STATE ZIP Price includes first-Class postage Send Check money order payable Mode/Aviation AMA 815 Fifteenth St. NW Washington DC 20005 S know others exist wouldnt much good tell soundand-fury advocates should go off fly oldtimers peanut scale Ten Models Year section has usual stories about develop ment of models plus excep tionally well prepared drawings Joe McCarthy price $825 including postage seems like lot until consider much pure free flight get $825 worth model magazines nowa days Bob Meuser 4200 Gregory St. Oak land CA 94619 ADVERTISERS INDEX Ace Radio Control99 Andrews Aircraft Model Co101 Richard C Barron104 Bavarian Precision Products Co 8 Boynton Associates119 Coverite5 Cox Hobbies Inc ide Front Cover DGM Industries112 Du-Bro Products115 EAA-Experimental Aircraft Assoc E K-Products7 Flyline Models98 Fli Shirts116 Fox Mfg Company7 Fusite117 Grish Brothers103 Paul K Guillow Inc111 K&B Mfg Company3 Kraft Southwestern Inc110 Kustom Kraftsmanship114 Midwest Model Products6 105 Modernistic Models114 Morrison Repla-Tech110 Original Mitt102 Packard Associates100 Pactra Industries106 Peck-Polymers112 Pica Enterprises97 113 Progress Mfg Company8 Sig Mfg Company1 Sterling Models Inc9 Tatone Products Inc9 Westport International Inc107 Williams Brothers109 World EnginesBack Cover 120 Model Aviation No103 No 104 No 118 No121 No 123 No 124 No 126 No131 No134 No 136 No 148 No 149 No155 No159 No 155 No 156 No 168 No 169 No177 No 178 No 181 No 183 No184 No189 No192 No193 No 194 No 195 No198 No 203 No 205 No 206 No 207 No212 No213 No215 No216 No217 No218 No219 No220 No 221 No 222 No 223 No224 No 225 No 226 No 227 No 228 No 229 No 230 No231 No 232 No233 No234 No235 No236 No 237 No238 Please print carefully Full-Size Plan List Available complete listing plans pre viously published mag azine through No 235 may obtained free charge writing enclose stamped self-addressed business-size envelope Model Aviation 815 15th St NW Washington DC 20005
Edition: Model Aviation - 1978/12
Page Numbers: 56, 57, 116, 117, 119, 120
Free Flight. Du ration Bob Meu ser MAGNUM Although semantic im plications small magnum earth shattering Vic Cunnyngham Jr son Jeff have built several magnums various sizes during past four years design scientific models Start Galaxie size suit fancy Add rib bay wing tip Lengthen body stabilizer chord Turn rudder around mount hind stab Fuselage easy-to-build uniform-width construction cheeks added just behind firewall Everything built flat no intentional warps geodetic construction ensures wont unintentional ones either Vic says flies right off draw ing board didnt mention lands Venerable S-Hook Re-Re-Revisited First off lets get nomenclature straight term S-hook has two rather different meanings Free Flight parlance refers situation rubber motor connected directly propshaft Looking propshaft rear S-hook looks like 5 See article No Noncents July 1976 ModAv supposed keep rubber centered doesnt thats getting ahead 71r7- ~7 ==J~= N-, \ 7 IIII mcsm Vc Cunnpt8ham Jr Vic Cunnyngham son Jeff have building Magnums several sizes far past four years story another usage S-hook means whatever sort gadget used connect rubber propshaft Such gad get necessary kind model beefier Peanut Scale Indoor model wound rubber motor discon nected prop olden times simply piece music wire bent look like 5 IZx~ber Lctnd rizznJ - TZz wire tuiin variation old clothspin trick almost filed under dumb ideas before Bob tried biggest advantage Vince Ferrareses pin instant adjustability clamping force 56 Model Aviation P-ju outdoor rubber rapidly increasing popularity Bobs Spookweight 30 grams out rubber Borrows few indoor construction techniques torque controlled auto-stab Dolores Snyder displays little Asteroid rub ber-powered model George Perryman design early Thirtiesbefore George began de signing funny looking ships Roselle plc Having some standard time proven S-hooks fail job re cently gave cause reconsider problem has come up motors considerably longer hook-to-hook distance new made-in-America rubber youre still flying Wakefield Pirelli perhaps dont have problem result has Mulvihill Oldtimer stickntissue fuselages have suffered internal hemorrhages S-hook got side ways George Xenakis has using scheme connecting motor propshaft looks should work under imaginable conditions fact does design comes originally Frank Parmenter sketch shows have tape-controlled milling machine basement its cinch limited drills files hacksaws lots cussin still possible cross pin removable necessary number strands twice odd number 10 14 18 etc num ber strands twice number say multiple 412 16 20 etc cross pin can permanently tached number strands twice neither odd nor number dont want hear about Pirelli Rubber mixed emotions present report seems abun dantly clear both Fred Pearces tests reports others have used stuff both indoor outdoor competition activities new Pirelli rubber some 5 10% better best rubber have previously access Thats good part bad parts cant get could b couldnt afford writing mid-August no steady US source has developed neighbors uncle has nightwatchman Pirelli works Milano Quoted prices high $30 pound begins make RC seem cheap Fred tests small quantities rubber5 grams soby stretching rubber nearly breaking point plot ting tensile force against stretch distance force relaxed Chris Mat suno tests full-size motors winding Fred points out Chris compare notes frequently stretch tests winding tests give virtually same results specific energy energy per unit mass new Pirelli 3860 ft lb/lb Thats way saying quantity rubber will release enough energy raise itself altitude 3860 ft best energy storage figure Ive encountered previous best Continued page 116 Music wire dip % od frciss tt4e 1 rivet jl C 3 32 7 lb ft-Ib/W 3 ( make S-hook just bend piece wire Right use connect prop shaft some models might find need George Xenakis Good luck text 242220iS 4 12 JO 8 6 4 2 0 fr77{Lati 7jPi-di 77A1 T5FAI / II 78 PirelLiI / l70 II I I/ 200400oO0090400 Stretdt in6u6 Fred Pearce tests small quantities rubber stretching nearly breaking point plotting tensile force against stretch distance force relaxed Graph shows typical results 77 1A1 78 FAT 7 Filatt 72 PirelLi December1978 57 3 r 3 140IZO AMA WINGS ME AND MY RC 78 NATS 4 COLOR4 COLOR PERMISSION FROM AMA LUSIVE RIGHTSWhile Last FROM ROYAL CROWN COLA Green color Pattern Pylon Soaring Chopper Free Flight RC Widow Heavenly Sport RC Cherub Ukie Speed Rat Racer Combat Aerobatics choice white 50/50% polyester shirt navy trim $550 Postage FLI CAP 4 Color AMA Wines 5 M L Size Adjustable $550 Postage custom work clubsspecial events businesses Any size color print shirts jackets caps Information sent request FLI * HIRT 5132 DEL REY LAS VEGAS NEVADA 89102 proper balance achieved flying surfaces may glued place Use slow hardening epoxy glue cement wing stab place advisable dowel pin wing fuselage done drilling three 3/16 holes through center section wing about inch fuselage whereupon drilled holes fitted hard wood dowel pins glued place point wing stabilizer filleted fuselage Fiberglass recommended material rear cap strip added top rear fuselage contoured shape fuselage Fabricate rear engine mounting bracket bracket constructed 1/4 3-16 aluminum stock airfoiled shape bracket can mounted ways however suggested methods follows Drill mount ing bracket positions denoted plans 6-32 clearance drill also drill fuselage least center po sition way through bot tom point blind mounting nut pulled place hole has drilled way through body body must hollowed proper place accommodate blind nuts second method drill tap bracket two 6-32 machine screws body drilled way through clearance drill whereupon machine screws run up through fuselage thread bracket second method used record setting air plane equivalent strength method bit easier install pipe retaining clip formed 020 steel stock stainless steel stock Stain less steel stock preferred material because will rust dur able clip fastened bracket 4-40 machine screw Sand entire airplane smooth Fill nicks cracks holes filler resand have preferred finishing technique use provided fuel-proof finish record airplane two coats Hobbypoxy clear sanded between coats two coats Super Poxy color first coat being brushed sanded last coat just sprayed oni am sure would work very well After takeoff get pylon soon pos Flying fuel speed sible fly airplane near records have set 50% nitromethane perfect groove possible Jets much 50% propylene oxide although some susceptible extreme loss others have success varying speed due deviating perfect nitro-propyl ratio slightly possibly suit groove case propeller weather conditions given day aircraft number 46 081 dia drill size Good luck Super Burp metering jet seems work best have questions feel free contact series 1 head number 42 0935 Mike Langlois 2408 W Cornwallis dia series 2 head Drill 12 metering Dr Greensboro NC 27408 jets #42 thru #53 Larger metering jets can made Dooling needle valve fittings F F Duration/Meuser similar brass fittings long continued page 57 seat properly spray bar ring used seal Only trial error will determine metering jet size will work best particular engine airplane combina tion Make first flight attempts richest metering jet will run ship hand held ground engine cuts off after release try next size smaller metering jet until keeps run ning Usually rule upright engine design richer run faster go Uprights usually lean out start finish although uni flow fuel tank Super Burp tends minimize change 100% rule engine/airplane combina tion try leaning yours down metering jet after have run rich can start engine use truck tire pump source air Any other source compressed air will work equally well buzz box conjunction probe used supply spark needed ignite fuel-air mixture entering combustion chamber during ignition probe use electric stove oven element cut end will protrude approximate spark plug location tail pipe used element can ob tained local used furniture appliance store flying airplane make sure line taut takeoff ready pull airplane pitmans hand releases airplane can skidded off use dolly wish use properly designed dolly takeoff 116 Model Aviation Pirelli 1964 material gave 3520 whereas average Pirelli near 3300 Current FAT Supply rubber run ning 3545 excellent average new Pirelli confused Filati 1977 batch Filati tested out 1570 graph shows results some Freds recent tests Note fall-off tension new Pirelli grad ual other kinds rubber Fred points out too-rapid fall-off can treacherous torque falls off too rapidly model unable readjust its climb attitude rapidly enough result ing mushing stall shortly after launching test data shown meas ured during mid-1978 except 1972 Pirelli measured mid1977 Note 1977 FAT rubber slightly harder 1978 FAI rub ber specific energy about same Fred thinks rubber actually about same man ufactured difference simply typical effect aging Test curves 1977 material made during 1977 look about like 1978 test curves 1978 material Anybody know can get some 1977 Filati Id like have some give friends CO-2 Duration New Indoor Class Bob Bailey England writing eromodel ler magazine tells about attempts half-dozen modelers see what could such models best far 642 flight Ian Dowsett model spans 44 inches Construction light course light Wing diagonal-rib Easy B construction 1/16 sq sliced ribs 1/16 X / leading trailing edges tapering 1/16 sq Stab 1/16 sq measures 4 X 18 smallish Fuselage 1/32-sheet box rub ber 1/32 sheet Max wing chord 61/8 tips tapered 4 All-up weight 26 grams plastic 7 inch Super Sleek Streak prop used giving motor run about 4 minutes rest glide Bailey sug gests prop develop ment effort should placed sus pect well soon seeing 9- 10-inch Pennyplane-style props sized engine puts out its last grunt just model touches down Telco isor British put Telco aretaking interest possibility trophy annual event wonder theyll limit event own brand stuff commercially available stuff just what Given free hand can see possibly develop highly sophisticated thing experts building own potentially danger ous hardware next thing know well asking Say whatever happened Indoor CO-2 Seems like sort dumb event wonder theyll accept proxyflown models CO-2 Duration New Outdoor Class 1978 British Nats saw first running Scramble event CO-2 duration models idea scramble origi nated Australia Clearly continued ex posure inverted environment made bit light head Anyhow idea get much total flight duration given time period can 'max~ number flights limited laws nature human endurance Contestants re quired retrieve foot Nats CO-2 Scramble halfhour time limit held during mid-afternoon heat exceptionally hot Nats Phil Ball won nine flights totaling 1042 Dihedral Joints Dihedral joints always pain about best can say methods making some less painful others methodone less painful ones have used several models recent ly has worked out rather well Say building model having flat center panel tip dihedral Build center section first canting end ribs inward course glue dry prop up proper dihedral angle Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 mare RPM greater power longer life replacing plug popular Y2-A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VDC charger recommended build tip right onto after has set spell prop whole thing up proper angle build other tip could start tip prop up add center panel forth little thought can arrange things minimum amount wing sticking up minimum length time somewhat vulnerable damage method works poly hedral too course Ribs dihedral joints tend warp due tension covering should thicker harder material regular ribs Leading Edges leading-edge conD FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VOC Stingerat big savings - championship products world modelers --DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 struction shown sketch used Jim Jones little complicated sticking piece quarter-square has lot offer tee-section basically lot stiffer conventional leading edge same weight way Jim does leading edge automat ically comes out rather accurately formed since leading edge shape prob December1978 117 NEW 1/2-A plugs Join Team ably important feature air foil thats important Furthermore stem T well anchored ribs wrinkles covering ribs join leading edge unlikely idea strip exactly right width begin about left sanding until notches disappear An accurate drawing leading edge regionperhaps two three times life size smaller modelsis starting point design leading edge way want cut strips suit take easier route designing leading edge accom modate stock wood sizes Variation No 437 Common House hold Clothespin about file under Dumb Ideas until tried Its really neat main feature Vince Ferrareses clothespin mod shown sketch instant adjustability clamping force Just slide fulcrum pin Vince used /s music wire fulcrum other things easily cut aluminum tubing examplewould work well /s inch tubing doesnt give wide enough jaw opening try o 78 Although will have cooled considerably time gets writing report Eleventh Annual Symposium National Free Flight Society hot off presses something new has added Free Flight Hall Fame Having oneupped AMA Hall Fame appoint ments starters NFFS chose reaffirm appointments made AMA Free Flighters add its saluta tion Future appointments will continue identify celebrate enshrine special individuals life work has formative lasting way Free Flight Model Aviation Following introductions NFFS Exec Direc Hardy Brodersen Editor Bob Dodds papers section thats followed Ten Models Year section 10 papers Id like present penetrating indepth analysis fact havent read yet Ill just comment briefly few caught eye Bruce Carmichael has work ing airfoil selection RPV flown atmosphere Mars presents analysis little-known work Dr Werner Pfenninger low-Reynoldsnumber airfoils Pfenninger employed succession trippers turbulators thin cambered airfoil obtained characteristics would hard beat Nordic A-2 glider glide would unusually fast also unusually flat sinking speed incredibly low Peter Allnut presents some wind-tunnel flight-test results new computerdesigned airfoils Thats sort like re ferring Thorn Birds typewriterwritten book airfoils look mite strange to Mother Nature apparently Earl Bailey presents some wind-tunneltest results series Top Flite wood props seems model airplane props arent efficient Durands classic 1923 tests would lead us believe John Worth points out thatfun seems Missing Ingredient modern competition Free Flight John points out high-technology high-perform ance gassies tend turn off potential participants sport indicates flying slow easy often road increased participation Its hard deny RC FF Oldtimer RC Soaring Peanut Scale growing participation AMA FAI Power events growth goal John probably right put practice Although low-and-slow free flight events spectator likely see sound fury AMA Gas events December1978 119 Please send me........ copies new fourth edition Radio Control Buyers Guide Enclosed $600 copy ordered $525 Guide plus $75 postage & handling Total Enclosed ___________ anada City State ZlP Return Boynton & Assoc Clifton House Clifton VA 22024 SAFE FLYING IS NO ACCIDENT ULL-SIZE PLA________ No 239Blue Birds$375 RC Ken Willards marvelous formation plane 4-chan 10power No 240Misfit$400 RC Randolphs classy shoulder wing sport job 4-chan 15power No 241Ace-Dart$175 RC Scale-up Ehling Dart Ace pulse rudder Pee Wee 02 No 242Dakota$275 FF Scale-up famous Dakota bipe great fun 049 power No243Super Burp$150 CL Record jet Speed model 1/2-size plan full-size details Kioud King 15-19 RC OldTimor Free Flight based upon 1938 record breaker FF 0 Wiley Post Biplane Petite durable scale design either rubber tail wagger pulse rudder GollyGaeWhiz Dan Rutherfords simple Half-A powered combat job turns dime .. $150 Gremlin Sturdy aerobatic RC biplane flies well 35s up SOs $300 4-Bits 40-powered RC 500 Club Racer has winning ways Good sport too $400 Semi-Pro Contest-winning HL glider has pop-up tail dethermalizer$100 Hall-Korda rubber John Oldenkamps 1/2-size all-balsa OldTimer 178 Gee Bee Medal Y 40-powered REZ stand-off scale great old-time racers $500 Callisto superb Standard Class RC sailplane also took Nets first $400 Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 QuickSilver RC 1/2A Pylon Racer incorporates latest techniques.. $200 comedian RC fun-fly aerobatic biplane good looker 40 60 $400 Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 Tercel Keith Trostles 1/2A CL Stunt ship flies excellent pattern$200 MidgetMustang CL 1975-1976 NatswinningGoodyearbyJohn Ballard $200 Nothing Fancy RC biplane 35 engines pretty handles baaufully..$825 Simitar RC spectacular flying wing 15 nose-mounted tractor $3 00 Dennyplene RC version famed cabin model kit 1937 1 9-25$400 zonker RC canard has pattern capebility 40 power 0 Country Boy FFbyJim Clem isthoroughbred/09/ 51 1/2A. $300 Bed Check Charlie RC Scale model Russian PT trainer 09115 . $300 Answer RC FF cabin 02 sized Replica Old-Timer Seville RC Sport low-wing sailplane 60 wing has excellent performance$350 Vintage 11 RC Antique type old-time open fuse construction 60$475 Chipmunk RC Scale winner 1976 World Championships Nets$9 00 Stiletto CL stunt model McDonald winner 1976 FAI World Champs$375 Vol ubre FF rubber-powered Wakefield Bob White Great winner$275 Natz Biplane RC aerobatic scale job takes 40/50 built-in muffler$475 Sportater RC deBolt wing choice aerobatics/racing. $375 Fokker 0-VIII RC 45 50 Two sheets 2-1/2 scale -$900 Hot Rock RC aerobatics 19-40 engines Simple tail-dragger$350 Air Camper FF Pientenpol 1/2A Charming old-timer 2-sheets $300 Livesey DL 5 RC English homebuilt 3-chan. 15s Exotic easy Good flier $500 Miss America RC Antique famous historic model 2 big sheets 35 40 $925 Eliminator II CL Class Speed asymmetric design record job$175 Windlord Ken Bates RC flying wing sailplane highly competitive$550 Mustang Al Meyers lovely CL P-Si 36 46 Sport Scale 5tunt$400 RocketeerA Al Lidbergs 02 FF replica famed 5choenbrun old-timer$200 RC Fairchild Ranger 24 AMA Sport Scale 2 big sheets$1000 FF Fokker universal Jumbo-sized rubber scale model Bill Noonan$500 CL Bobcat John Kilsdonks Slow Ratlatest state art . $150 RC Insider indoorsand out Electric power pulse rudder$300 Winterhawk RC standard class sailplane rugged escellent soarer$350 Fly Baby CL Scala model Pete Bowers homebuiltfor 35-40 RC engine$375 Horsefly RC sport job Ace pulse rudderless than$l00with radio$250 Ole Reliable RC 70 version 38 oldtimer REM controls 19-25$426 Spitfire CL profile 2 versionsbuilt-up solid stunter 35$450 AG-i Agrivation RC 4-chan 25-40 realistic trike gear low wing$400 Fighters Two CL 1/2A balsa profiles Japanese Nate us P-26 Peashooter$200 Solution RC competitive pattern deBolt 40 power$475 AR-25 RC tiny high performance sailplane 2 channelswinglets$276 Tiny white Mouse CL 1/2A powered mouse racer frequent big time winner$150 Ms Peach Embryo rubber endurance Bill Warner Nets winner$150 Sport 40 RC 4-chan. trike-gear shoulder-wing 40$425 Typhoon CL profile 15 WW II fighter Paul Scheef$300 Mentor FF Very nice 40 towliner small fields$300 Dasher RC combo racing pattern characteristics 15 25$300 Stits Jr CL worlds smallest plane good flier 25 35$300 Wildcat RC Ace pulse rudder 02 Grumman fighter Bowers Srull$175 Circle numbers plans wish order 103 104 118 121 123124125131134136146149155159165166 168169177178181183184189192193194195 198203205206207212213215216217218219 220221222223224225226227228229230231 232 233 234 235 236 237 238 239 240 241 242 243 Enclosed S NAME STREET CITY STATE ZIP Price includes first-Class postage Send Check money order payable Mode/Aviation AMA 815 Fifteenth St. NW Washington DC 20005 S know others exist wouldnt much good tell soundand-fury advocates should go off fly oldtimers peanut scale Ten Models Year section has usual stories about develop ment of models plus excep tionally well prepared drawings Joe McCarthy price $825 including postage seems like lot until consider much pure free flight get $825 worth model magazines nowa days Bob Meuser 4200 Gregory St. Oak land CA 94619 ADVERTISERS INDEX Ace Radio Control99 Andrews Aircraft Model Co101 Richard C Barron104 Bavarian Precision Products Co 8 Boynton Associates119 Coverite5 Cox Hobbies Inc ide Front Cover DGM Industries112 Du-Bro Products115 EAA-Experimental Aircraft Assoc E K-Products7 Flyline Models98 Fli Shirts116 Fox Mfg Company7 Fusite117 Grish Brothers103 Paul K Guillow Inc111 K&B Mfg Company3 Kraft Southwestern Inc110 Kustom Kraftsmanship114 Midwest Model Products6 105 Modernistic Models114 Morrison Repla-Tech110 Original Mitt102 Packard Associates100 Pactra Industries106 Peck-Polymers112 Pica Enterprises97 113 Progress Mfg Company8 Sig Mfg Company1 Sterling Models Inc9 Tatone Products Inc9 Westport International Inc107 Williams Brothers109 World EnginesBack Cover 120 Model Aviation No103 No 104 No 118 No121 No 123 No 124 No 126 No131 No134 No 136 No 148 No 149 No155 No159 No 155 No 156 No 168 No 169 No177 No 178 No 181 No 183 No184 No189 No192 No193 No 194 No 195 No198 No 203 No 205 No 206 No 207 No212 No213 No215 No216 No217 No218 No219 No220 No 221 No 222 No 223 No224 No 225 No 226 No 227 No 228 No 229 No 230 No231 No 232 No233 No234 No235 No236 No 237 No238 Please print carefully Full-Size Plan List Available complete listing plans pre viously published mag azine through No 235 may obtained free charge writing enclose stamped self-addressed business-size envelope Model Aviation 815 15th St NW Washington DC 20005
Edition: Model Aviation - 1978/12
Page Numbers: 56, 57, 116, 117, 119, 120
Free Flight. Du ration Bob Meu ser MAGNUM Although semantic im plications small magnum earth shattering Vic Cunnyngham Jr son Jeff have built several magnums various sizes during past four years design scientific models Start Galaxie size suit fancy Add rib bay wing tip Lengthen body stabilizer chord Turn rudder around mount hind stab Fuselage easy-to-build uniform-width construction cheeks added just behind firewall Everything built flat no intentional warps geodetic construction ensures wont unintentional ones either Vic says flies right off draw ing board didnt mention lands Venerable S-Hook Re-Re-Revisited First off lets get nomenclature straight term S-hook has two rather different meanings Free Flight parlance refers situation rubber motor connected directly propshaft Looking propshaft rear S-hook looks like 5 See article No Noncents July 1976 ModAv supposed keep rubber centered doesnt thats getting ahead 71r7- ~7 ==J~= N-, \ 7 IIII mcsm Vc Cunnpt8ham Jr Vic Cunnyngham son Jeff have building Magnums several sizes far past four years story another usage S-hook means whatever sort gadget used connect rubber propshaft Such gad get necessary kind model beefier Peanut Scale Indoor model wound rubber motor discon nected prop olden times simply piece music wire bent look like 5 IZx~ber Lctnd rizznJ - TZz wire tuiin variation old clothspin trick almost filed under dumb ideas before Bob tried biggest advantage Vince Ferrareses pin instant adjustability clamping force 56 Model Aviation P-ju outdoor rubber rapidly increasing popularity Bobs Spookweight 30 grams out rubber Borrows few indoor construction techniques torque controlled auto-stab Dolores Snyder displays little Asteroid rub ber-powered model George Perryman design early Thirtiesbefore George began de signing funny looking ships Roselle plc Having some standard time proven S-hooks fail job re cently gave cause reconsider problem has come up motors considerably longer hook-to-hook distance new made-in-America rubber youre still flying Wakefield Pirelli perhaps dont have problem result has Mulvihill Oldtimer stickntissue fuselages have suffered internal hemorrhages S-hook got side ways George Xenakis has using scheme connecting motor propshaft looks should work under imaginable conditions fact does design comes originally Frank Parmenter sketch shows have tape-controlled milling machine basement its cinch limited drills files hacksaws lots cussin still possible cross pin removable necessary number strands twice odd number 10 14 18 etc num ber strands twice number say multiple 412 16 20 etc cross pin can permanently tached number strands twice neither odd nor number dont want hear about Pirelli Rubber mixed emotions present report seems abun dantly clear both Fred Pearces tests reports others have used stuff both indoor outdoor competition activities new Pirelli rubber some 5 10% better best rubber have previously access Thats good part bad parts cant get could b couldnt afford writing mid-August no steady US source has developed neighbors uncle has nightwatchman Pirelli works Milano Quoted prices high $30 pound begins make RC seem cheap Fred tests small quantities rubber5 grams soby stretching rubber nearly breaking point plot ting tensile force against stretch distance force relaxed Chris Mat suno tests full-size motors winding Fred points out Chris compare notes frequently stretch tests winding tests give virtually same results specific energy energy per unit mass new Pirelli 3860 ft lb/lb Thats way saying quantity rubber will release enough energy raise itself altitude 3860 ft best energy storage figure Ive encountered previous best Continued page 116 Music wire dip % od frciss tt4e 1 rivet jl C 3 32 7 lb ft-Ib/W 3 ( make S-hook just bend piece wire Right use connect prop shaft some models might find need George Xenakis Good luck text 242220iS 4 12 JO 8 6 4 2 0 fr77{Lati 7jPi-di 77A1 T5FAI / II 78 PirelLiI / l70 II I I/ 200400oO0090400 Stretdt in6u6 Fred Pearce tests small quantities rubber stretching nearly breaking point plotting tensile force against stretch distance force relaxed Graph shows typical results 77 1A1 78 FAT 7 Filatt 72 PirelLi December1978 57 3 r 3 140IZO AMA WINGS ME AND MY RC 78 NATS 4 COLOR4 COLOR PERMISSION FROM AMA LUSIVE RIGHTSWhile Last FROM ROYAL CROWN COLA Green color Pattern Pylon Soaring Chopper Free Flight RC Widow Heavenly Sport RC Cherub Ukie Speed Rat Racer Combat Aerobatics choice white 50/50% polyester shirt navy trim $550 Postage FLI CAP 4 Color AMA Wines 5 M L Size Adjustable $550 Postage custom work clubsspecial events businesses Any size color print shirts jackets caps Information sent request FLI * HIRT 5132 DEL REY LAS VEGAS NEVADA 89102 proper balance achieved flying surfaces may glued place Use slow hardening epoxy glue cement wing stab place advisable dowel pin wing fuselage done drilling three 3/16 holes through center section wing about inch fuselage whereupon drilled holes fitted hard wood dowel pins glued place point wing stabilizer filleted fuselage Fiberglass recommended material rear cap strip added top rear fuselage contoured shape fuselage Fabricate rear engine mounting bracket bracket constructed 1/4 3-16 aluminum stock airfoiled shape bracket can mounted ways however suggested methods follows Drill mount ing bracket positions denoted plans 6-32 clearance drill also drill fuselage least center po sition way through bot tom point blind mounting nut pulled place hole has drilled way through body body must hollowed proper place accommodate blind nuts second method drill tap bracket two 6-32 machine screws body drilled way through clearance drill whereupon machine screws run up through fuselage thread bracket second method used record setting air plane equivalent strength method bit easier install pipe retaining clip formed 020 steel stock stainless steel stock Stain less steel stock preferred material because will rust dur able clip fastened bracket 4-40 machine screw Sand entire airplane smooth Fill nicks cracks holes filler resand have preferred finishing technique use provided fuel-proof finish record airplane two coats Hobbypoxy clear sanded between coats two coats Super Poxy color first coat being brushed sanded last coat just sprayed oni am sure would work very well After takeoff get pylon soon pos Flying fuel speed sible fly airplane near records have set 50% nitromethane perfect groove possible Jets much 50% propylene oxide although some susceptible extreme loss others have success varying speed due deviating perfect nitro-propyl ratio slightly possibly suit groove case propeller weather conditions given day aircraft number 46 081 dia drill size Good luck Super Burp metering jet seems work best have questions feel free contact series 1 head number 42 0935 Mike Langlois 2408 W Cornwallis dia series 2 head Drill 12 metering Dr Greensboro NC 27408 jets #42 thru #53 Larger metering jets can made Dooling needle valve fittings F F Duration/Meuser similar brass fittings long continued page 57 seat properly spray bar ring used seal Only trial error will determine metering jet size will work best particular engine airplane combina tion Make first flight attempts richest metering jet will run ship hand held ground engine cuts off after release try next size smaller metering jet until keeps run ning Usually rule upright engine design richer run faster go Uprights usually lean out start finish although uni flow fuel tank Super Burp tends minimize change 100% rule engine/airplane combina tion try leaning yours down metering jet after have run rich can start engine use truck tire pump source air Any other source compressed air will work equally well buzz box conjunction probe used supply spark needed ignite fuel-air mixture entering combustion chamber during ignition probe use electric stove oven element cut end will protrude approximate spark plug location tail pipe used element can ob tained local used furniture appliance store flying airplane make sure line taut takeoff ready pull airplane pitmans hand releases airplane can skidded off use dolly wish use properly designed dolly takeoff 116 Model Aviation Pirelli 1964 material gave 3520 whereas average Pirelli near 3300 Current FAT Supply rubber run ning 3545 excellent average new Pirelli confused Filati 1977 batch Filati tested out 1570 graph shows results some Freds recent tests Note fall-off tension new Pirelli grad ual other kinds rubber Fred points out too-rapid fall-off can treacherous torque falls off too rapidly model unable readjust its climb attitude rapidly enough result ing mushing stall shortly after launching test data shown meas ured during mid-1978 except 1972 Pirelli measured mid1977 Note 1977 FAT rubber slightly harder 1978 FAI rub ber specific energy about same Fred thinks rubber actually about same man ufactured difference simply typical effect aging Test curves 1977 material made during 1977 look about like 1978 test curves 1978 material Anybody know can get some 1977 Filati Id like have some give friends CO-2 Duration New Indoor Class Bob Bailey England writing eromodel ler magazine tells about attempts half-dozen modelers see what could such models best far 642 flight Ian Dowsett model spans 44 inches Construction light course light Wing diagonal-rib Easy B construction 1/16 sq sliced ribs 1/16 X / leading trailing edges tapering 1/16 sq Stab 1/16 sq measures 4 X 18 smallish Fuselage 1/32-sheet box rub ber 1/32 sheet Max wing chord 61/8 tips tapered 4 All-up weight 26 grams plastic 7 inch Super Sleek Streak prop used giving motor run about 4 minutes rest glide Bailey sug gests prop develop ment effort should placed sus pect well soon seeing 9- 10-inch Pennyplane-style props sized engine puts out its last grunt just model touches down Telco isor British put Telco aretaking interest possibility trophy annual event wonder theyll limit event own brand stuff commercially available stuff just what Given free hand can see possibly develop highly sophisticated thing experts building own potentially danger ous hardware next thing know well asking Say whatever happened Indoor CO-2 Seems like sort dumb event wonder theyll accept proxyflown models CO-2 Duration New Outdoor Class 1978 British Nats saw first running Scramble event CO-2 duration models idea scramble origi nated Australia Clearly continued ex posure inverted environment made bit light head Anyhow idea get much total flight duration given time period can 'max~ number flights limited laws nature human endurance Contestants re quired retrieve foot Nats CO-2 Scramble halfhour time limit held during mid-afternoon heat exceptionally hot Nats Phil Ball won nine flights totaling 1042 Dihedral Joints Dihedral joints always pain about best can say methods making some less painful others methodone less painful ones have used several models recent ly has worked out rather well Say building model having flat center panel tip dihedral Build center section first canting end ribs inward course glue dry prop up proper dihedral angle Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 mare RPM greater power longer life replacing plug popular Y2-A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VDC charger recommended build tip right onto after has set spell prop whole thing up proper angle build other tip could start tip prop up add center panel forth little thought can arrange things minimum amount wing sticking up minimum length time somewhat vulnerable damage method works poly hedral too course Ribs dihedral joints tend warp due tension covering should thicker harder material regular ribs Leading Edges leading-edge conD FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VOC Stingerat big savings - championship products world modelers --DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 struction shown sketch used Jim Jones little complicated sticking piece quarter-square has lot offer tee-section basically lot stiffer conventional leading edge same weight way Jim does leading edge automat ically comes out rather accurately formed since leading edge shape prob December1978 117 NEW 1/2-A plugs Join Team ably important feature air foil thats important Furthermore stem T well anchored ribs wrinkles covering ribs join leading edge unlikely idea strip exactly right width begin about left sanding until notches disappear An accurate drawing leading edge regionperhaps two three times life size smaller modelsis starting point design leading edge way want cut strips suit take easier route designing leading edge accom modate stock wood sizes Variation No 437 Common House hold Clothespin about file under Dumb Ideas until tried Its really neat main feature Vince Ferrareses clothespin mod shown sketch instant adjustability clamping force Just slide fulcrum pin Vince used /s music wire fulcrum other things easily cut aluminum tubing examplewould work well /s inch tubing doesnt give wide enough jaw opening try o 78 Although will have cooled considerably time gets writing report Eleventh Annual Symposium National Free Flight Society hot off presses something new has added Free Flight Hall Fame Having oneupped AMA Hall Fame appoint ments starters NFFS chose reaffirm appointments made AMA Free Flighters add its saluta tion Future appointments will continue identify celebrate enshrine special individuals life work has formative lasting way Free Flight Model Aviation Following introductions NFFS Exec Direc Hardy Brodersen Editor Bob Dodds papers section thats followed Ten Models Year section 10 papers Id like present penetrating indepth analysis fact havent read yet Ill just comment briefly few caught eye Bruce Carmichael has work ing airfoil selection RPV flown atmosphere Mars presents analysis little-known work Dr Werner Pfenninger low-Reynoldsnumber airfoils Pfenninger employed succession trippers turbulators thin cambered airfoil obtained characteristics would hard beat Nordic A-2 glider glide would unusually fast also unusually flat sinking speed incredibly low Peter Allnut presents some wind-tunnel flight-test results new computerdesigned airfoils Thats sort like re ferring Thorn Birds typewriterwritten book airfoils look mite strange to Mother Nature apparently Earl Bailey presents some wind-tunneltest results series Top Flite wood props seems model airplane props arent efficient Durands classic 1923 tests would lead us believe John Worth points out thatfun seems Missing Ingredient modern competition Free Flight John points out high-technology high-perform ance gassies tend turn off potential participants sport indicates flying slow easy often road increased participation Its hard deny RC FF Oldtimer RC Soaring Peanut Scale growing participation AMA FAI Power events growth goal John probably right put practice Although low-and-slow free flight events spectator likely see sound fury AMA Gas events December1978 119 Please send me........ copies new fourth edition Radio Control Buyers Guide Enclosed $600 copy ordered $525 Guide plus $75 postage & handling Total Enclosed ___________ anada City State ZlP Return Boynton & Assoc Clifton House Clifton VA 22024 SAFE FLYING IS NO ACCIDENT ULL-SIZE PLA________ No 239Blue Birds$375 RC Ken Willards marvelous formation plane 4-chan 10power No 240Misfit$400 RC Randolphs classy shoulder wing sport job 4-chan 15power No 241Ace-Dart$175 RC Scale-up Ehling Dart Ace pulse rudder Pee Wee 02 No 242Dakota$275 FF Scale-up famous Dakota bipe great fun 049 power No243Super Burp$150 CL Record jet Speed model 1/2-size plan full-size details Kioud King 15-19 RC OldTimor Free Flight based upon 1938 record breaker FF 0 Wiley Post Biplane Petite durable scale design either rubber tail wagger pulse rudder GollyGaeWhiz Dan Rutherfords simple Half-A powered combat job turns dime .. $150 Gremlin Sturdy aerobatic RC biplane flies well 35s up SOs $300 4-Bits 40-powered RC 500 Club Racer has winning ways Good sport too $400 Semi-Pro Contest-winning HL glider has pop-up tail dethermalizer$100 Hall-Korda rubber John Oldenkamps 1/2-size all-balsa OldTimer 178 Gee Bee Medal Y 40-powered REZ stand-off scale great old-time racers $500 Callisto superb Standard Class RC sailplane also took Nets first $400 Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 QuickSilver RC 1/2A Pylon Racer incorporates latest techniques.. $200 comedian RC fun-fly aerobatic biplane good looker 40 60 $400 Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 Tercel Keith Trostles 1/2A CL Stunt ship flies excellent pattern$200 MidgetMustang CL 1975-1976 NatswinningGoodyearbyJohn Ballard $200 Nothing Fancy RC biplane 35 engines pretty handles baaufully..$825 Simitar RC spectacular flying wing 15 nose-mounted tractor $3 00 Dennyplene RC version famed cabin model kit 1937 1 9-25$400 zonker RC canard has pattern capebility 40 power 0 Country Boy FFbyJim Clem isthoroughbred/09/ 51 1/2A. $300 Bed Check Charlie RC Scale model Russian PT trainer 09115 . $300 Answer RC FF cabin 02 sized Replica Old-Timer Seville RC Sport low-wing sailplane 60 wing has excellent performance$350 Vintage 11 RC Antique type old-time open fuse construction 60$475 Chipmunk RC Scale winner 1976 World Championships Nets$9 00 Stiletto CL stunt model McDonald winner 1976 FAI World Champs$375 Vol ubre FF rubber-powered Wakefield Bob White Great winner$275 Natz Biplane RC aerobatic scale job takes 40/50 built-in muffler$475 Sportater RC deBolt wing choice aerobatics/racing. $375 Fokker 0-VIII RC 45 50 Two sheets 2-1/2 scale -$900 Hot Rock RC aerobatics 19-40 engines Simple tail-dragger$350 Air Camper FF Pientenpol 1/2A Charming old-timer 2-sheets $300 Livesey DL 5 RC English homebuilt 3-chan. 15s Exotic easy Good flier $500 Miss America RC Antique famous historic model 2 big sheets 35 40 $925 Eliminator II CL Class Speed asymmetric design record job$175 Windlord Ken Bates RC flying wing sailplane highly competitive$550 Mustang Al Meyers lovely CL P-Si 36 46 Sport Scale 5tunt$400 RocketeerA Al Lidbergs 02 FF replica famed 5choenbrun old-timer$200 RC Fairchild Ranger 24 AMA Sport Scale 2 big sheets$1000 FF Fokker universal Jumbo-sized rubber scale model Bill Noonan$500 CL Bobcat John Kilsdonks Slow Ratlatest state art . $150 RC Insider indoorsand out Electric power pulse rudder$300 Winterhawk RC standard class sailplane rugged escellent soarer$350 Fly Baby CL Scala model Pete Bowers homebuiltfor 35-40 RC engine$375 Horsefly RC sport job Ace pulse rudderless than$l00with radio$250 Ole Reliable RC 70 version 38 oldtimer REM controls 19-25$426 Spitfire CL profile 2 versionsbuilt-up solid stunter 35$450 AG-i Agrivation RC 4-chan 25-40 realistic trike gear low wing$400 Fighters Two CL 1/2A balsa profiles Japanese Nate us P-26 Peashooter$200 Solution RC competitive pattern deBolt 40 power$475 AR-25 RC tiny high performance sailplane 2 channelswinglets$276 Tiny white Mouse CL 1/2A powered mouse racer frequent big time winner$150 Ms Peach Embryo rubber endurance Bill Warner Nets winner$150 Sport 40 RC 4-chan. trike-gear shoulder-wing 40$425 Typhoon CL profile 15 WW II fighter Paul Scheef$300 Mentor FF Very nice 40 towliner small fields$300 Dasher RC combo racing pattern characteristics 15 25$300 Stits Jr CL worlds smallest plane good flier 25 35$300 Wildcat RC Ace pulse rudder 02 Grumman fighter Bowers Srull$175 Circle numbers plans wish order 103 104 118 121 123124125131134136146149155159165166 168169177178181183184189192193194195 198203205206207212213215216217218219 220221222223224225226227228229230231 232 233 234 235 236 237 238 239 240 241 242 243 Enclosed S NAME STREET CITY STATE ZIP Price includes first-Class postage Send Check money order payable Mode/Aviation AMA 815 Fifteenth St. NW Washington DC 20005 S know others exist wouldnt much good tell soundand-fury advocates should go off fly oldtimers peanut scale Ten Models Year section has usual stories about develop ment of models plus excep tionally well prepared drawings Joe McCarthy price $825 including postage seems like lot until consider much pure free flight get $825 worth model magazines nowa days Bob Meuser 4200 Gregory St. Oak land CA 94619 ADVERTISERS INDEX Ace Radio Control99 Andrews Aircraft Model Co101 Richard C Barron104 Bavarian Precision Products Co 8 Boynton Associates119 Coverite5 Cox Hobbies Inc ide Front Cover DGM Industries112 Du-Bro Products115 EAA-Experimental Aircraft Assoc E K-Products7 Flyline Models98 Fli Shirts116 Fox Mfg Company7 Fusite117 Grish Brothers103 Paul K Guillow Inc111 K&B Mfg Company3 Kraft Southwestern Inc110 Kustom Kraftsmanship114 Midwest Model Products6 105 Modernistic Models114 Morrison Repla-Tech110 Original Mitt102 Packard Associates100 Pactra Industries106 Peck-Polymers112 Pica Enterprises97 113 Progress Mfg Company8 Sig Mfg Company1 Sterling Models Inc9 Tatone Products Inc9 Westport International Inc107 Williams Brothers109 World EnginesBack Cover 120 Model Aviation No103 No 104 No 118 No121 No 123 No 124 No 126 No131 No134 No 136 No 148 No 149 No155 No159 No 155 No 156 No 168 No 169 No177 No 178 No 181 No 183 No184 No189 No192 No193 No 194 No 195 No198 No 203 No 205 No 206 No 207 No212 No213 No215 No216 No217 No218 No219 No220 No 221 No 222 No 223 No224 No 225 No 226 No 227 No 228 No 229 No 230 No231 No 232 No233 No234 No235 No236 No 237 No238 Please print carefully Full-Size Plan List Available complete listing plans pre viously published mag azine through No 235 may obtained free charge writing enclose stamped self-addressed business-size envelope Model Aviation 815 15th St NW Washington DC 20005
Edition: Model Aviation - 1978/12
Page Numbers: 56, 57, 116, 117, 119, 120
Free Flight. Du ration Bob Meu ser MAGNUM Although semantic im plications small magnum earth shattering Vic Cunnyngham Jr son Jeff have built several magnums various sizes during past four years design scientific models Start Galaxie size suit fancy Add rib bay wing tip Lengthen body stabilizer chord Turn rudder around mount hind stab Fuselage easy-to-build uniform-width construction cheeks added just behind firewall Everything built flat no intentional warps geodetic construction ensures wont unintentional ones either Vic says flies right off draw ing board didnt mention lands Venerable S-Hook Re-Re-Revisited First off lets get nomenclature straight term S-hook has two rather different meanings Free Flight parlance refers situation rubber motor connected directly propshaft Looking propshaft rear S-hook looks like 5 See article No Noncents July 1976 ModAv supposed keep rubber centered doesnt thats getting ahead 71r7- ~7 ==J~= N-, \ 7 IIII mcsm Vc Cunnpt8ham Jr Vic Cunnyngham son Jeff have building Magnums several sizes far past four years story another usage S-hook means whatever sort gadget used connect rubber propshaft Such gad get necessary kind model beefier Peanut Scale Indoor model wound rubber motor discon nected prop olden times simply piece music wire bent look like 5 IZx~ber Lctnd rizznJ - TZz wire tuiin variation old clothspin trick almost filed under dumb ideas before Bob tried biggest advantage Vince Ferrareses pin instant adjustability clamping force 56 Model Aviation P-ju outdoor rubber rapidly increasing popularity Bobs Spookweight 30 grams out rubber Borrows few indoor construction techniques torque controlled auto-stab Dolores Snyder displays little Asteroid rub ber-powered model George Perryman design early Thirtiesbefore George began de signing funny looking ships Roselle plc Having some standard time proven S-hooks fail job re cently gave cause reconsider problem has come up motors considerably longer hook-to-hook distance new made-in-America rubber youre still flying Wakefield Pirelli perhaps dont have problem result has Mulvihill Oldtimer stickntissue fuselages have suffered internal hemorrhages S-hook got side ways George Xenakis has using scheme connecting motor propshaft looks should work under imaginable conditions fact does design comes originally Frank Parmenter sketch shows have tape-controlled milling machine basement its cinch limited drills files hacksaws lots cussin still possible cross pin removable necessary number strands twice odd number 10 14 18 etc num ber strands twice number say multiple 412 16 20 etc cross pin can permanently tached number strands twice neither odd nor number dont want hear about Pirelli Rubber mixed emotions present report seems abun dantly clear both Fred Pearces tests reports others have used stuff both indoor outdoor competition activities new Pirelli rubber some 5 10% better best rubber have previously access Thats good part bad parts cant get could b couldnt afford writing mid-August no steady US source has developed neighbors uncle has nightwatchman Pirelli works Milano Quoted prices high $30 pound begins make RC seem cheap Fred tests small quantities rubber5 grams soby stretching rubber nearly breaking point plot ting tensile force against stretch distance force relaxed Chris Mat suno tests full-size motors winding Fred points out Chris compare notes frequently stretch tests winding tests give virtually same results specific energy energy per unit mass new Pirelli 3860 ft lb/lb Thats way saying quantity rubber will release enough energy raise itself altitude 3860 ft best energy storage figure Ive encountered previous best Continued page 116 Music wire dip % od frciss tt4e 1 rivet jl C 3 32 7 lb ft-Ib/W 3 ( make S-hook just bend piece wire Right use connect prop shaft some models might find need George Xenakis Good luck text 242220iS 4 12 JO 8 6 4 2 0 fr77{Lati 7jPi-di 77A1 T5FAI / II 78 PirelLiI / l70 II I I/ 200400oO0090400 Stretdt in6u6 Fred Pearce tests small quantities rubber stretching nearly breaking point plotting tensile force against stretch distance force relaxed Graph shows typical results 77 1A1 78 FAT 7 Filatt 72 PirelLi December1978 57 3 r 3 140IZO AMA WINGS ME AND MY RC 78 NATS 4 COLOR4 COLOR PERMISSION FROM AMA LUSIVE RIGHTSWhile Last FROM ROYAL CROWN COLA Green color Pattern Pylon Soaring Chopper Free Flight RC Widow Heavenly Sport RC Cherub Ukie Speed Rat Racer Combat Aerobatics choice white 50/50% polyester shirt navy trim $550 Postage FLI CAP 4 Color AMA Wines 5 M L Size Adjustable $550 Postage custom work clubsspecial events businesses Any size color print shirts jackets caps Information sent request FLI * HIRT 5132 DEL REY LAS VEGAS NEVADA 89102 proper balance achieved flying surfaces may glued place Use slow hardening epoxy glue cement wing stab place advisable dowel pin wing fuselage done drilling three 3/16 holes through center section wing about inch fuselage whereupon drilled holes fitted hard wood dowel pins glued place point wing stabilizer filleted fuselage Fiberglass recommended material rear cap strip added top rear fuselage contoured shape fuselage Fabricate rear engine mounting bracket bracket constructed 1/4 3-16 aluminum stock airfoiled shape bracket can mounted ways however suggested methods follows Drill mount ing bracket positions denoted plans 6-32 clearance drill also drill fuselage least center po sition way through bot tom point blind mounting nut pulled place hole has drilled way through body body must hollowed proper place accommodate blind nuts second method drill tap bracket two 6-32 machine screws body drilled way through clearance drill whereupon machine screws run up through fuselage thread bracket second method used record setting air plane equivalent strength method bit easier install pipe retaining clip formed 020 steel stock stainless steel stock Stain less steel stock preferred material because will rust dur able clip fastened bracket 4-40 machine screw Sand entire airplane smooth Fill nicks cracks holes filler resand have preferred finishing technique use provided fuel-proof finish record airplane two coats Hobbypoxy clear sanded between coats two coats Super Poxy color first coat being brushed sanded last coat just sprayed oni am sure would work very well After takeoff get pylon soon pos Flying fuel speed sible fly airplane near records have set 50% nitromethane perfect groove possible Jets much 50% propylene oxide although some susceptible extreme loss others have success varying speed due deviating perfect nitro-propyl ratio slightly possibly suit groove case propeller weather conditions given day aircraft number 46 081 dia drill size Good luck Super Burp metering jet seems work best have questions feel free contact series 1 head number 42 0935 Mike Langlois 2408 W Cornwallis dia series 2 head Drill 12 metering Dr Greensboro NC 27408 jets #42 thru #53 Larger metering jets can made Dooling needle valve fittings F F Duration/Meuser similar brass fittings long continued page 57 seat properly spray bar ring used seal Only trial error will determine metering jet size will work best particular engine airplane combina tion Make first flight attempts richest metering jet will run ship hand held ground engine cuts off after release try next size smaller metering jet until keeps run ning Usually rule upright engine design richer run faster go Uprights usually lean out start finish although uni flow fuel tank Super Burp tends minimize change 100% rule engine/airplane combina tion try leaning yours down metering jet after have run rich can start engine use truck tire pump source air Any other source compressed air will work equally well buzz box conjunction probe used supply spark needed ignite fuel-air mixture entering combustion chamber during ignition probe use electric stove oven element cut end will protrude approximate spark plug location tail pipe used element can ob tained local used furniture appliance store flying airplane make sure line taut takeoff ready pull airplane pitmans hand releases airplane can skidded off use dolly wish use properly designed dolly takeoff 116 Model Aviation Pirelli 1964 material gave 3520 whereas average Pirelli near 3300 Current FAT Supply rubber run ning 3545 excellent average new Pirelli confused Filati 1977 batch Filati tested out 1570 graph shows results some Freds recent tests Note fall-off tension new Pirelli grad ual other kinds rubber Fred points out too-rapid fall-off can treacherous torque falls off too rapidly model unable readjust its climb attitude rapidly enough result ing mushing stall shortly after launching test data shown meas ured during mid-1978 except 1972 Pirelli measured mid1977 Note 1977 FAT rubber slightly harder 1978 FAI rub ber specific energy about same Fred thinks rubber actually about same man ufactured difference simply typical effect aging Test curves 1977 material made during 1977 look about like 1978 test curves 1978 material Anybody know can get some 1977 Filati Id like have some give friends CO-2 Duration New Indoor Class Bob Bailey England writing eromodel ler magazine tells about attempts half-dozen modelers see what could such models best far 642 flight Ian Dowsett model spans 44 inches Construction light course light Wing diagonal-rib Easy B construction 1/16 sq sliced ribs 1/16 X / leading trailing edges tapering 1/16 sq Stab 1/16 sq measures 4 X 18 smallish Fuselage 1/32-sheet box rub ber 1/32 sheet Max wing chord 61/8 tips tapered 4 All-up weight 26 grams plastic 7 inch Super Sleek Streak prop used giving motor run about 4 minutes rest glide Bailey sug gests prop develop ment effort should placed sus pect well soon seeing 9- 10-inch Pennyplane-style props sized engine puts out its last grunt just model touches down Telco isor British put Telco aretaking interest possibility trophy annual event wonder theyll limit event own brand stuff commercially available stuff just what Given free hand can see possibly develop highly sophisticated thing experts building own potentially danger ous hardware next thing know well asking Say whatever happened Indoor CO-2 Seems like sort dumb event wonder theyll accept proxyflown models CO-2 Duration New Outdoor Class 1978 British Nats saw first running Scramble event CO-2 duration models idea scramble origi nated Australia Clearly continued ex posure inverted environment made bit light head Anyhow idea get much total flight duration given time period can 'max~ number flights limited laws nature human endurance Contestants re quired retrieve foot Nats CO-2 Scramble halfhour time limit held during mid-afternoon heat exceptionally hot Nats Phil Ball won nine flights totaling 1042 Dihedral Joints Dihedral joints always pain about best can say methods making some less painful others methodone less painful ones have used several models recent ly has worked out rather well Say building model having flat center panel tip dihedral Build center section first canting end ribs inward course glue dry prop up proper dihedral angle Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 mare RPM greater power longer life replacing plug popular Y2-A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VDC charger recommended build tip right onto after has set spell prop whole thing up proper angle build other tip could start tip prop up add center panel forth little thought can arrange things minimum amount wing sticking up minimum length time somewhat vulnerable damage method works poly hedral too course Ribs dihedral joints tend warp due tension covering should thicker harder material regular ribs Leading Edges leading-edge conD FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VOC Stingerat big savings - championship products world modelers --DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 struction shown sketch used Jim Jones little complicated sticking piece quarter-square has lot offer tee-section basically lot stiffer conventional leading edge same weight way Jim does leading edge automat ically comes out rather accurately formed since leading edge shape prob December1978 117 NEW 1/2-A plugs Join Team ably important feature air foil thats important Furthermore stem T well anchored ribs wrinkles covering ribs join leading edge unlikely idea strip exactly right width begin about left sanding until notches disappear An accurate drawing leading edge regionperhaps two three times life size smaller modelsis starting point design leading edge way want cut strips suit take easier route designing leading edge accom modate stock wood sizes Variation No 437 Common House hold Clothespin about file under Dumb Ideas until tried Its really neat main feature Vince Ferrareses clothespin mod shown sketch instant adjustability clamping force Just slide fulcrum pin Vince used /s music wire fulcrum other things easily cut aluminum tubing examplewould work well /s inch tubing doesnt give wide enough jaw opening try o 78 Although will have cooled considerably time gets writing report Eleventh Annual Symposium National Free Flight Society hot off presses something new has added Free Flight Hall Fame Having oneupped AMA Hall Fame appoint ments starters NFFS chose reaffirm appointments made AMA Free Flighters add its saluta tion Future appointments will continue identify celebrate enshrine special individuals life work has formative lasting way Free Flight Model Aviation Following introductions NFFS Exec Direc Hardy Brodersen Editor Bob Dodds papers section thats followed Ten Models Year section 10 papers Id like present penetrating indepth analysis fact havent read yet Ill just comment briefly few caught eye Bruce Carmichael has work ing airfoil selection RPV flown atmosphere Mars presents analysis little-known work Dr Werner Pfenninger low-Reynoldsnumber airfoils Pfenninger employed succession trippers turbulators thin cambered airfoil obtained characteristics would hard beat Nordic A-2 glider glide would unusually fast also unusually flat sinking speed incredibly low Peter Allnut presents some wind-tunnel flight-test results new computerdesigned airfoils Thats sort like re ferring Thorn Birds typewriterwritten book airfoils look mite strange to Mother Nature apparently Earl Bailey presents some wind-tunneltest results series Top Flite wood props seems model airplane props arent efficient Durands classic 1923 tests would lead us believe John Worth points out thatfun seems Missing Ingredient modern competition Free Flight John points out high-technology high-perform ance gassies tend turn off potential participants sport indicates flying slow easy often road increased participation Its hard deny RC FF Oldtimer RC Soaring Peanut Scale growing participation AMA FAI Power events growth goal John probably right put practice Although low-and-slow free flight events spectator likely see sound fury AMA Gas events December1978 119 Please send me........ copies new fourth edition Radio Control Buyers Guide Enclosed $600 copy ordered $525 Guide plus $75 postage & handling Total Enclosed ___________ anada City State ZlP Return Boynton & Assoc Clifton House Clifton VA 22024 SAFE FLYING IS NO ACCIDENT ULL-SIZE PLA________ No 239Blue Birds$375 RC Ken Willards marvelous formation plane 4-chan 10power No 240Misfit$400 RC Randolphs classy shoulder wing sport job 4-chan 15power No 241Ace-Dart$175 RC Scale-up Ehling Dart Ace pulse rudder Pee Wee 02 No 242Dakota$275 FF Scale-up famous Dakota bipe great fun 049 power No243Super Burp$150 CL Record jet Speed model 1/2-size plan full-size details Kioud King 15-19 RC OldTimor Free Flight based upon 1938 record breaker FF 0 Wiley Post Biplane Petite durable scale design either rubber tail wagger pulse rudder GollyGaeWhiz Dan Rutherfords simple Half-A powered combat job turns dime .. $150 Gremlin Sturdy aerobatic RC biplane flies well 35s up SOs $300 4-Bits 40-powered RC 500 Club Racer has winning ways Good sport too $400 Semi-Pro Contest-winning HL glider has pop-up tail dethermalizer$100 Hall-Korda rubber John Oldenkamps 1/2-size all-balsa OldTimer 178 Gee Bee Medal Y 40-powered REZ stand-off scale great old-time racers $500 Callisto superb Standard Class RC sailplane also took Nets first $400 Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 QuickSilver RC 1/2A Pylon Racer incorporates latest techniques.. $200 comedian RC fun-fly aerobatic biplane good looker 40 60 $400 Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 Tercel Keith Trostles 1/2A CL Stunt ship flies excellent pattern$200 MidgetMustang CL 1975-1976 NatswinningGoodyearbyJohn Ballard $200 Nothing Fancy RC biplane 35 engines pretty handles baaufully..$825 Simitar RC spectacular flying wing 15 nose-mounted tractor $3 00 Dennyplene RC version famed cabin model kit 1937 1 9-25$400 zonker RC canard has pattern capebility 40 power 0 Country Boy FFbyJim Clem isthoroughbred/09/ 51 1/2A. $300 Bed Check Charlie RC Scale model Russian PT trainer 09115 . $300 Answer RC FF cabin 02 sized Replica Old-Timer Seville RC Sport low-wing sailplane 60 wing has excellent performance$350 Vintage 11 RC Antique type old-time open fuse construction 60$475 Chipmunk RC Scale winner 1976 World Championships Nets$9 00 Stiletto CL stunt model McDonald winner 1976 FAI World Champs$375 Vol ubre FF rubber-powered Wakefield Bob White Great winner$275 Natz Biplane RC aerobatic scale job takes 40/50 built-in muffler$475 Sportater RC deBolt wing choice aerobatics/racing. $375 Fokker 0-VIII RC 45 50 Two sheets 2-1/2 scale -$900 Hot Rock RC aerobatics 19-40 engines Simple tail-dragger$350 Air Camper FF Pientenpol 1/2A Charming old-timer 2-sheets $300 Livesey DL 5 RC English homebuilt 3-chan. 15s Exotic easy Good flier $500 Miss America RC Antique famous historic model 2 big sheets 35 40 $925 Eliminator II CL Class Speed asymmetric design record job$175 Windlord Ken Bates RC flying wing sailplane highly competitive$550 Mustang Al Meyers lovely CL P-Si 36 46 Sport Scale 5tunt$400 RocketeerA Al Lidbergs 02 FF replica famed 5choenbrun old-timer$200 RC Fairchild Ranger 24 AMA Sport Scale 2 big sheets$1000 FF Fokker universal Jumbo-sized rubber scale model Bill Noonan$500 CL Bobcat John Kilsdonks Slow Ratlatest state art . $150 RC Insider indoorsand out Electric power pulse rudder$300 Winterhawk RC standard class sailplane rugged escellent soarer$350 Fly Baby CL Scala model Pete Bowers homebuiltfor 35-40 RC engine$375 Horsefly RC sport job Ace pulse rudderless than$l00with radio$250 Ole Reliable RC 70 version 38 oldtimer REM controls 19-25$426 Spitfire CL profile 2 versionsbuilt-up solid stunter 35$450 AG-i Agrivation RC 4-chan 25-40 realistic trike gear low wing$400 Fighters Two CL 1/2A balsa profiles Japanese Nate us P-26 Peashooter$200 Solution RC competitive pattern deBolt 40 power$475 AR-25 RC tiny high performance sailplane 2 channelswinglets$276 Tiny white Mouse CL 1/2A powered mouse racer frequent big time winner$150 Ms Peach Embryo rubber endurance Bill Warner Nets winner$150 Sport 40 RC 4-chan. trike-gear shoulder-wing 40$425 Typhoon CL profile 15 WW II fighter Paul Scheef$300 Mentor FF Very nice 40 towliner small fields$300 Dasher RC combo racing pattern characteristics 15 25$300 Stits Jr CL worlds smallest plane good flier 25 35$300 Wildcat RC Ace pulse rudder 02 Grumman fighter Bowers Srull$175 Circle numbers plans wish order 103 104 118 121 123124125131134136146149155159165166 168169177178181183184189192193194195 198203205206207212213215216217218219 220221222223224225226227228229230231 232 233 234 235 236 237 238 239 240 241 242 243 Enclosed S NAME STREET CITY STATE ZIP Price includes first-Class postage Send Check money order payable Mode/Aviation AMA 815 Fifteenth St. NW Washington DC 20005 S know others exist wouldnt much good tell soundand-fury advocates should go off fly oldtimers peanut scale Ten Models Year section has usual stories about develop ment of models plus excep tionally well prepared drawings Joe McCarthy price $825 including postage seems like lot until consider much pure free flight get $825 worth model magazines nowa days Bob Meuser 4200 Gregory St. Oak land CA 94619 ADVERTISERS INDEX Ace Radio Control99 Andrews Aircraft Model Co101 Richard C Barron104 Bavarian Precision Products Co 8 Boynton Associates119 Coverite5 Cox Hobbies Inc ide Front Cover DGM Industries112 Du-Bro Products115 EAA-Experimental Aircraft Assoc E K-Products7 Flyline Models98 Fli Shirts116 Fox Mfg Company7 Fusite117 Grish Brothers103 Paul K Guillow Inc111 K&B Mfg Company3 Kraft Southwestern Inc110 Kustom Kraftsmanship114 Midwest Model Products6 105 Modernistic Models114 Morrison Repla-Tech110 Original Mitt102 Packard Associates100 Pactra Industries106 Peck-Polymers112 Pica Enterprises97 113 Progress Mfg Company8 Sig Mfg Company1 Sterling Models Inc9 Tatone Products Inc9 Westport International Inc107 Williams Brothers109 World EnginesBack Cover 120 Model Aviation No103 No 104 No 118 No121 No 123 No 124 No 126 No131 No134 No 136 No 148 No 149 No155 No159 No 155 No 156 No 168 No 169 No177 No 178 No 181 No 183 No184 No189 No192 No193 No 194 No 195 No198 No 203 No 205 No 206 No 207 No212 No213 No215 No216 No217 No218 No219 No220 No 221 No 222 No 223 No224 No 225 No 226 No 227 No 228 No 229 No 230 No231 No 232 No233 No234 No235 No236 No 237 No238 Please print carefully Full-Size Plan List Available complete listing plans pre viously published mag azine through No 235 may obtained free charge writing enclose stamped self-addressed business-size envelope Model Aviation 815 15th St NW Washington DC 20005