CO-2 STUNT No will say youre copycat Although exactly common August 1948 issue Flying Models carried CO-2 Free Right model suggested movable controls might fitted fly Cl About two years later Frank Ehling powered early Stunters tiny CO-2 engine former kimer model engine company produced large CO-2 engine time Its walletcrunching greed fuel required 2-oz steel sparklet cartridge carried along gave flight new 0036 cu Telco 3000 offers CL FF fans clear advance Invertible gives 40 grams thrust medium power setting build Humm Bug 1 no noise crud mind-jangling flying sites come availablelike meeting room Rub-on dry transfers art supply store can used attractive decorations ordi nary decals too heavyl Odd angle balsa puslirod caused special bellcrank needed 90 Model Aviation FULL-SIZE PLANS AVAILABLE.SEE PAGE 164 -1 WRAP WITN004 A C H~ADD WASHERS fuir5~- ABUTTON E L CoFOR WEIBHT STUB--C--- h POWERED i----\LAIIINATE -TWS 032 PLY _z---------------PUSHROD 062 FIREWALL 052 PLYBAMBOO 2 REQUIREDDOWEL SEW GEAR TO ONEI 004 SOFT WIREFUSELAGE TAPER STA RTS4 FIREWALL WITHI fINSIDE ONL GOES DOW N TO I/B FLISELA5 56 NUT 00V-OOZ BRASS WASHER 032 FLY BUTTONS -- 001 BRASS WASHER PLY DOUBLING BUTTONS BUSH INGS 032 WASHER 005 WASiGB 2-56BOLT DOWN Ii iViSILK HINGESHORN DETAIL NOT SCALE Li -~TLi_ _ Li OIOBRASSHORN 1/16 SQ FACING STRIPS PIN WRUDDER SOFT WIRE ABIUSTS RUDDER 3/4 BIA 0123456 Inches HUMM BUG SPAN 21 AREA 55IN WE IGHT 45GRAIISMAX POWER TELCO{O6%J LOADING AOZS/SQ FT DESIGNED BY DOUG OAHLBE local library after club adjourns theres room heres model 2 can learn much about really building lightweight will hopefully cany over larger models 3 allows us blizzard-bound balsa builders keep hand flying lose lot controlling ability over win ter flying 4 Some Indoor modeling folks may have wanted try Con trol Line losing indoor comfort Heres chance 5 Sport fliers will find real change pace 6 makes unusually good trainer flights can shortened less 10 seconds 7 Malltype hobby shows great attract young beginners doing few simple stunts like loops inverted flight after just such display conceived Humm Bug 8 1 suspect Indoor Combat could flown A-in tissue streamers Wild Realize before start model no Jr Stilettonor last word genre offered starting point Lets build Humm Bug Its gas Construction full night leisure work should produce model Balsa 4 6-lb stock used fuselage Remember 6-lb stock 50% heavier 4-lb building 40-gram thrust level lack scale Model Aviation advertisers will sell plans making accurate $300 youre short time get scale right now re member three standard Daisey steel BBs weigh gram Put 81 BBs 27 grams smallest plastic bag have trim off excess tape shut simple teeter-totter balance can made using common yardstick balsa must balance BBs Cut fuselage shape core out least amount shownmore youre brave Make Warren-trussing strips material just removed identical density wood remaining fuse lage helps reduce warps Glue trussing place cyanoacrylate CyA notch out tank clearance leaving 1/16 around edge Cut out wing tail slots Allow extra 3/s trailing edge shift wing aft balance purposes Cut out both 1/32 ply tirewalls bend 032 wire gear single-wheel landing gear 025- 028 two-wheel setup larger firewall shown trainer version smaller single-wheel gear Sew gear firewall thread after notching clear ance Glue firewalls together glue dries pull 28 BBs neat little plastic bag teeter-totter balance find apiece 1/16 x 3 x 36 balsa does weigh June 1983 91 Model author gives better feel models sise 21-in span big 1A profiles gives great maneu verability CO-2 engine providing fraction typical 4As power extremely lightweight structure must Left Humm Bug has sleek profile reminiscent early 1950s CL planes especially Jim Walker A-J models Upright engine two-wheel gear best trainer version Right Silk hinges used author barely visible Dark spot inboard elevator top control horn Left All pieces before covering fuselage assembly Note Warren-trussing fuselage strength saving weight Right Special bellcrank seen bottom view get pivot point close planes center line Tip-weight box makes use washers nine grams sheet 79 grams giving 49 lb/cu ft density Cut out wing tail surfaces wood Round edges dont try airfoil flat-plate surfaces will cause warp cotton swab stick glued place connect elevators Install soft wire rudder hinges tip weight box Ep oxy firewall tiniest dabs pos sible Glue firewall gussets dry drill engine mount holes bellcrank 1/32 ply wee 1/32-in doubling buttons top side provide support bushings odd bellcrank gets pivot point close aircraft center line possible put ting hole fuselage first pushrod 3/32-in bamboo Overbuilding again next 1/16-in hard balsa dowel wire ends trimming Re sult 50% weight reduction Bind short music wire tips pushrod thread 004 copper wire glue Use white glue silk 7 hinges horn should have least 350 up down elevator Cover fuselage bamboo paper choice color shiny side out can substitute Ply Span Reason very little dope needed seal Old Timer Models California sells both Sig Mfg Co sells Ply Span Permanently borrow lightweight -in hollow plastic wheels old Sleek Streek rubber model whole plane can bought new 79 Serious builders will disdain such things build hollow spoked wheel mushy balsa bitsy 1/64 ply side buttons axle ride built weighed 2/3rds what Streek wheel weighs CyA glue wing place after moving body 3/16 outboard giving unequal panels tip weight box tiny lumpkin pine placed sideways partially balance lead-out drag provide tip skid single-wheel gear operation 048 id 098 eyelets standard Perfect Parts items easily lost beneath fingernails careless Temporary lead-outs 006 wire wrapped 004 copper wire Once sweep adjustment found discarded lines tied directly bellcrank component weights users accurate scales Telco 3000 TT prop 40g thrust Ca 4000 rpm 220 grams Telco 6000 TT prop 45g thrust @ 4500 rpm 260 grams Wing sanded bare 47 grams Wing painted minus controls 54 grams Trainer fuselage papered firewalls two-wheel gear fin paint 795 grams Fuselage above single-wheel gear lightweight nose 495 grams Tip weight box complete screw 3 gram Sleek Streek hollow plastic wheels 45 gram Hardwood rubber model wheels 1-in diameter 23 grams definite no-no properly built model needs neither nose nor tail weight can carve good propeller can probabiy reduce prop weight s lighter model the duration flight less power needed Depending grade wing wood used may notice some wing 92 Model Aviation Close-up adlustable lead-out system change line sweep just unplug eyelets move backward forward needed reinsert flex flight doubt affects flight bothers add 004 copper flying wires top bottomor V-braces 1/32 mushy balsa may have no idea badly us tend overbuild calculator pointed out interesting things like fact given length 045 wire has twice volume hence twice weight 032 wire Ohaus scale told four stock Telco mounting screws weigh total gram toolbox produced four re placements same length thinner weighed 42 gram 58% reduction course single-wheel gear half weight standard two wheels During point testing friend suggested try nose weight Reassemble needed add no weight current 396 grams have vertical takeoff capability medium power set ting despite warnings have managed produce embarrassingly heavy model suggest fit Cox 01 least will have something fly efforts although previouslymentioned advantages will lost Without braces 01 engine may shear wing Finish Brush three separate coats 50/50 clear nitrate dope/thinner fuselage sanding lightly between coats Next spray three coats 30/70 nitrate clear/thinner over whole model sanding needed 600 grit paper Yep 30/70 correct need keep weight down coat Aerogloss Bonanza Blue sprayed color Cockpit lines India ink applied Rapidograph technical pen fin flash reflects Anglo-Saxon heritage Telco Flying read Telcos instructions Oper ating engine isnt hard just bit differ ent what may used shouldnt take over 60 seconds liquid CO-2 td run down through tiny inside diameter needle tank via also tiny tank inlet lay cylinder over level point downward first puncturing cartridge liquid CO-2 may freeze things open charge will lost prop received engine hole off-center check yours sturdy prop low pitch should able withstand very high rpm safely Using ready-made props best results achieved prop no-name CO-2 sold mail few years ago has diameter 5 course balsa prop would best doubt would break very often One-pound-test line will stand l0-g load safelythat model weighs 45 grams less cientswho actually used build models rather import cast themhave known build flying lines well Cloth lines can stretched out doped sanding between coats 600-grit Two thin coats dope need re duces line stretch flight problem also cuts line drag never hurts didnt bother natural lines approximately 010 015 diameter ever try measure cloth lines tried both 10 15-ft lengths 10-ft lines better prepared assist model just PAMPA folks big Precision Aerobatics models occasional whipping during maneuvers have gotten seven side Loops flight before lines started getting sticky Inside Square Loops recognizable Triangle Lazy Eight Inverted Flight have also done Clearly other maneuvers possible Short lines functional equivalent extra gram-power 40 grams what have work Warning girlfriend apparently cowed bark snarl throbbing Telco failed snap prop completely over Only bumping against compression resulted nice engine runbackwards Upon release Humm Bug responded normally negative thrust backing away fair pace Despite being first ca nard clockwise taxi effort realized what wrong kept full-down elevator Im glad happened private coupled times flying inverted ran out charge landed inverted atop copper motor feeder tube such low flying speeds low weight no damContinued page 164 June 1983 93 FULL*SIZE*PLANS 409 Fokker Spin III$825 FF Scale Early Fokker monoplane trainer 049 power 3 shts No 410Pober Pixie$1300 RC Multi-Scale 40 power 4-channels Can built sport flier Precision Scale depending detail added 2 shts No 411Humm Bug$175 CL 00-2-powered profile mite sport Stunt Gee Bee Model Y 40-powered RC stand-off scale great old-bree racers$500 Stiilelto CL Stool rrrodel McDonald winner 19761990 1902 PAl World Champs$375 Ole Reliable PC 70 oersinn 39 old-timer REM controls 19-25$425 Bloc Birds PC Ken Willards lorroation plane 4-ch 105375 crashmaster CL Crash-proof trainer 2 sizes15-30 35-40$125 Gee Bee RC Granger Williams magnificent Model Z br 40 engine$755 cap 29 40-powered scale PC French aerobatic plane Low wing tail-dragger 2 sheelo9750 Gee Bee Sr Sporlster PC t/vscale hp HaSke 91 power Prototypo span 3011 212 sheets$1175 Mini F-16 PC Sarpolas 049 dacted tan sport tIler tor 2-cE Balsa wings tail lose stroctare$275 Pegasus PC Watsons giant sopor sailplane tealores 1bps spoilers Ttail 164 wingspan9675 1930 Fleel Biplaee PC Sport Scale br 35-40 4-ch Wingspan 56 16 scale Two sheets$625 Drake II PC Ken Willards Ilping boat Icr 3-ch 15-power Pip trow land remosable gear$375 Taylor cob PC Don Stalls Schoolyard-Scale tot 049s 2-3 Ch Spans 50 in$350 Zephyr PC Small 2-cs glider hasd-laanch tow thermal slope soaring9299 Wasp VI PP Mike Stops Nato-winning Qaldoor HLG$190 Onestep PC Trainer has very forgining flying qoalities 3-ch. 10- 25 power$425 Merlyn PC Giant 155-is span Sailplane oses 3 PC channels$755 Maule Lanar Rocket PC 1/4-Scale spans 925 5-oh flaps 12 cv engine$1290 PIeces PP Indoor Easy B Robber-power contest-winner Op W Van Gorder$195 Sapercat PC Halt-A Pylon Racersport flier Aileron elenator control Poam wing$250 Seawaster PC Willards 40-size tlping hoar d-ch Strap-on gear tar landylanel 2 shts$1190 Space ShaBle II PC Larger improved version ot Has glider 3-oh$550 cAp-21 PC Giant-Scale Prench aerohatic craft spans 71/411 Qoadra power 2 sheets - 40091400 Stralo-Streak PC Old-Timer vemion Garamis tamoon 41 PP design tot power 2ch$500 Neighelon PC Low-wing tn-gear sportster power d-ch$500 Marlssa PP Robber-powered sportster Golden Age tradition$390 Snapshop Twin PC Workhorse atility/sport ship tot twin 30-40 4-h oh Poam wegs liOs t2lbs2shts$1198 Anrorna PC SportAerohatc flier tot 049-10 -power oses 2 or3 ch$350 Wiegnoaster CL Sport-Stanter Profile toselage sheet wings w hops$200 Mr Spook Ill PC Ply Sport Pylon Non/Sportsman Paoern sheet sport Uses d-ch. 20-40 pint$500 Mgpoboom CL t2A Combat ship large light saper performer$375 WilSIl ljawk 500 PP Hot Class AB Gas competition ship 111-23 power Nats-wrening design$375 Nosy FlIer PP Pobber-power sports flier captains Golden Age flavor Spans 26 in$300 caflisto 62 PC Ply sleek Pats-winning Sailplane AMA Mod Std Unlimited classes$795 Similar Alp PC Evans famous design retains 60-sz Pagern plane Petracts foam wing$550 Laser 200 PC Sport Scale replica championship Anrobatic tlinr Uses 40 power 4-h ch 2 shin$1075 czech Mate PP Cole low-wing spoester tot CO-2 powers spans 211 in$225 US Male PC Hoge gentle-flying biplane tot trainer sport Spans 90 Pot 60 engine 3-ch Two shIn$1450 Lii Gamble CL Nats-wroning Scale Pacer HOT lh power$325 christopher PC Sport Scale parachotistl Two-ch set hides torso mooes arms steer chore$425 Kinod King PC Redoced modernized sersion 011938 design lot Old-Timer 2 3 oh$450 Rain crow II PP High-podormance Goldoor Hand Laonched Glider$175 Sky Behy CL 12A Pacer Moose Scale Plans show Coo Black Widow Spans 18/4 V-fail$175 Lee-Richards PP Electric-powered 020 Scale ring-wing olde$350 Bell YPM-l Airacada CL Sport Scale profile twin tot posher reed-oalve 049s$325 Gee Bee R-1 PC HafIkes latest 1/4-scale spans 75 weighs 15 lb 90 larger Poor shts no dee$2225 Zephyr 1190 PC AMA Class B Sailplane 3-channel PC gear$675 Midi-Slow CL Pat-Pace-style Stoel trainer 20-power Profile$590 Royal Lancer PP Basic competition model tot AMA Clans sees staodard-pedormasce IS engines$550 ApeFP lombO Robber Scale Armnlrong-Whifworth research bplane md-Twentes$475 cub Floalplane PC Sport Scale tot 049-f 0-size engines 4-ch PC J-3 floats classic$650 Focke-ult 190 CL Profile Scale t2A power leatures onirtan engine moont realism$390 Regent Oneen Skies PC Poe-type biplane 40-60 power 4-channels 2 sheets$1390 Piper comanche CL Sport Scale ases twin 25s throOle control 2 sheets$625 Booing XPSB-1 PC Sport Scale power 2-3 channels$425 Re-Volt-Er PC electric-power sport tiler 2-channel 05 motOr$650 ininininin 3 Circle numbers plans wish order 131193225239262282291299302 307 I310 314326332343348354356358 362 365368370371372374375376377 378 3 379380382383385386388389390 392 1 393394395396397398399400401402 403404405406407408409410411 Please print Carefully Enclosed $ __- __ ___ __ ___ ____ __ ___ NAME __ __ ________ __ _ __ _____ STREET __ __ __ __ __________ __ __ ___ __ ___ ___ __ __ __ _ __ __ __ __ __ __ ____ __ __ __ __ __ STATE______ZIP7rder Price includes lirot-class postage Send check moneypayable Model Aviation AMA 1810 SamuBI Morse Dr neston VA 22090 ~.967fjnanything self-destruct engine fea tures chrome liner aluminum piston special ring Everything has proper fit engine doesnt tear itself apart well con tinues run after few ground-poundings well soon find out bccauhe limited number engines should out Memorial Day meets As message Howard Rushs fuel says 10% nitro fuel same can said about motor tests faster number props anything elsehut real world harsh place Combat equipment Charlie Johnson 3716 Ingrohom St San Diego CA 92109 CL Navy Carrier/Perry Continued page 87 problem Ron installed Acme battery holder C-size alkaline cell under canopy Class Guardian single cell would provide enough power three official flights withdut switch open circuit during high speed could used starting Acme battery holders available Sig photo month Glen Magrees 15-sized Wildcat model won Rocky Mountain Aeromodelers 15-class Carrier competition last fall high speed 65 mph stow speed 248 mph event has under develop ment since last summer Glen reports 10 12 models under way years tlying season rules event de scribed February issue Richard L Perry 7578 Vogels Way Spring Iteld VA 22135 Humm Bug/Dahike Continued page 93 age done although would avoid doing repeatedly cement happens helper can easily catch model simply cocking both arms up elbow level floor letting model coast tummy model decelerates quickly power fades typical lightlyloaded aircraft Lightly loaded lowpowered models may stall easily also recover readily tf line tension needed bend rudder add 010 020 shim behind engine give out board thrust alter line sweep crankshaft throttle controlled turning flat hex nut just behind prop raise lower dot 150 factory setting Sprint performance factory calls will give 78 grams thrust shorter period time would however generate power com plex vertical maneuvers Rotating cylin der 900 outward sidewinder con figuration slightly reduces required tip weight extra drag cylinder correctly placed am certain runs well position though seemed have irregularities runs may have due other causes further testing needed Have fun Humm Bug 164 Model Aviation No 131 No 193 No 225 No 239 No 262 No 282 No 291 No 299 No 392 No 307 No 310 No 214 No 326 No 332 No 343 No 340 No 354 No 356 No 350 No 362 No 369 No 369 No 370 No 371 No 372 No 374 No 375 No 376 No 377 No 376 No 379 No 209 No 202 No 382 No 305 No 286 No 380 No 389 No 390 No 392 No 393 No 394 No 395 No 396 No 397 No 398 No 399 No 490 No 401 No 402 No 403 No 4114 No 405 No 406 No 497 No 498 0 00 o 0 0 fv O IN 210 00 010 0. Eco sf
Edition: Model Aviation - 1983/06
Page Numbers: 90, 91, 92, 93, 164
CO-2 STUNT No will say youre copycat Although exactly common August 1948 issue Flying Models carried CO-2 Free Right model suggested movable controls might fitted fly Cl About two years later Frank Ehling powered early Stunters tiny CO-2 engine former kimer model engine company produced large CO-2 engine time Its walletcrunching greed fuel required 2-oz steel sparklet cartridge carried along gave flight new 0036 cu Telco 3000 offers CL FF fans clear advance Invertible gives 40 grams thrust medium power setting build Humm Bug 1 no noise crud mind-jangling flying sites come availablelike meeting room Rub-on dry transfers art supply store can used attractive decorations ordi nary decals too heavyl Odd angle balsa puslirod caused special bellcrank needed 90 Model Aviation FULL-SIZE PLANS AVAILABLE.SEE PAGE 164 -1 WRAP WITN004 A C H~ADD WASHERS fuir5~- ABUTTON E L CoFOR WEIBHT STUB--C--- h POWERED i----\LAIIINATE -TWS 032 PLY _z---------------PUSHROD 062 FIREWALL 052 PLYBAMBOO 2 REQUIREDDOWEL SEW GEAR TO ONEI 004 SOFT WIREFUSELAGE TAPER STA RTS4 FIREWALL WITHI fINSIDE ONL GOES DOW N TO I/B FLISELA5 56 NUT 00V-OOZ BRASS WASHER 032 FLY BUTTONS -- 001 BRASS WASHER PLY DOUBLING BUTTONS BUSH INGS 032 WASHER 005 WASiGB 2-56BOLT DOWN Ii iViSILK HINGESHORN DETAIL NOT SCALE Li -~TLi_ _ Li OIOBRASSHORN 1/16 SQ FACING STRIPS PIN WRUDDER SOFT WIRE ABIUSTS RUDDER 3/4 BIA 0123456 Inches HUMM BUG SPAN 21 AREA 55IN WE IGHT 45GRAIISMAX POWER TELCO{O6%J LOADING AOZS/SQ FT DESIGNED BY DOUG OAHLBE local library after club adjourns theres room heres model 2 can learn much about really building lightweight will hopefully cany over larger models 3 allows us blizzard-bound balsa builders keep hand flying lose lot controlling ability over win ter flying 4 Some Indoor modeling folks may have wanted try Con trol Line losing indoor comfort Heres chance 5 Sport fliers will find real change pace 6 makes unusually good trainer flights can shortened less 10 seconds 7 Malltype hobby shows great attract young beginners doing few simple stunts like loops inverted flight after just such display conceived Humm Bug 8 1 suspect Indoor Combat could flown A-in tissue streamers Wild Realize before start model no Jr Stilettonor last word genre offered starting point Lets build Humm Bug Its gas Construction full night leisure work should produce model Balsa 4 6-lb stock used fuselage Remember 6-lb stock 50% heavier 4-lb building 40-gram thrust level lack scale Model Aviation advertisers will sell plans making accurate $300 youre short time get scale right now re member three standard Daisey steel BBs weigh gram Put 81 BBs 27 grams smallest plastic bag have trim off excess tape shut simple teeter-totter balance can made using common yardstick balsa must balance BBs Cut fuselage shape core out least amount shownmore youre brave Make Warren-trussing strips material just removed identical density wood remaining fuse lage helps reduce warps Glue trussing place cyanoacrylate CyA notch out tank clearance leaving 1/16 around edge Cut out wing tail slots Allow extra 3/s trailing edge shift wing aft balance purposes Cut out both 1/32 ply tirewalls bend 032 wire gear single-wheel landing gear 025- 028 two-wheel setup larger firewall shown trainer version smaller single-wheel gear Sew gear firewall thread after notching clear ance Glue firewalls together glue dries pull 28 BBs neat little plastic bag teeter-totter balance find apiece 1/16 x 3 x 36 balsa does weigh June 1983 91 Model author gives better feel models sise 21-in span big 1A profiles gives great maneu verability CO-2 engine providing fraction typical 4As power extremely lightweight structure must Left Humm Bug has sleek profile reminiscent early 1950s CL planes especially Jim Walker A-J models Upright engine two-wheel gear best trainer version Right Silk hinges used author barely visible Dark spot inboard elevator top control horn Left All pieces before covering fuselage assembly Note Warren-trussing fuselage strength saving weight Right Special bellcrank seen bottom view get pivot point close planes center line Tip-weight box makes use washers nine grams sheet 79 grams giving 49 lb/cu ft density Cut out wing tail surfaces wood Round edges dont try airfoil flat-plate surfaces will cause warp cotton swab stick glued place connect elevators Install soft wire rudder hinges tip weight box Ep oxy firewall tiniest dabs pos sible Glue firewall gussets dry drill engine mount holes bellcrank 1/32 ply wee 1/32-in doubling buttons top side provide support bushings odd bellcrank gets pivot point close aircraft center line possible put ting hole fuselage first pushrod 3/32-in bamboo Overbuilding again next 1/16-in hard balsa dowel wire ends trimming Re sult 50% weight reduction Bind short music wire tips pushrod thread 004 copper wire glue Use white glue silk 7 hinges horn should have least 350 up down elevator Cover fuselage bamboo paper choice color shiny side out can substitute Ply Span Reason very little dope needed seal Old Timer Models California sells both Sig Mfg Co sells Ply Span Permanently borrow lightweight -in hollow plastic wheels old Sleek Streek rubber model whole plane can bought new 79 Serious builders will disdain such things build hollow spoked wheel mushy balsa bitsy 1/64 ply side buttons axle ride built weighed 2/3rds what Streek wheel weighs CyA glue wing place after moving body 3/16 outboard giving unequal panels tip weight box tiny lumpkin pine placed sideways partially balance lead-out drag provide tip skid single-wheel gear operation 048 id 098 eyelets standard Perfect Parts items easily lost beneath fingernails careless Temporary lead-outs 006 wire wrapped 004 copper wire Once sweep adjustment found discarded lines tied directly bellcrank component weights users accurate scales Telco 3000 TT prop 40g thrust Ca 4000 rpm 220 grams Telco 6000 TT prop 45g thrust @ 4500 rpm 260 grams Wing sanded bare 47 grams Wing painted minus controls 54 grams Trainer fuselage papered firewalls two-wheel gear fin paint 795 grams Fuselage above single-wheel gear lightweight nose 495 grams Tip weight box complete screw 3 gram Sleek Streek hollow plastic wheels 45 gram Hardwood rubber model wheels 1-in diameter 23 grams definite no-no properly built model needs neither nose nor tail weight can carve good propeller can probabiy reduce prop weight s lighter model the duration flight less power needed Depending grade wing wood used may notice some wing 92 Model Aviation Close-up adlustable lead-out system change line sweep just unplug eyelets move backward forward needed reinsert flex flight doubt affects flight bothers add 004 copper flying wires top bottomor V-braces 1/32 mushy balsa may have no idea badly us tend overbuild calculator pointed out interesting things like fact given length 045 wire has twice volume hence twice weight 032 wire Ohaus scale told four stock Telco mounting screws weigh total gram toolbox produced four re placements same length thinner weighed 42 gram 58% reduction course single-wheel gear half weight standard two wheels During point testing friend suggested try nose weight Reassemble needed add no weight current 396 grams have vertical takeoff capability medium power set ting despite warnings have managed produce embarrassingly heavy model suggest fit Cox 01 least will have something fly efforts although previouslymentioned advantages will lost Without braces 01 engine may shear wing Finish Brush three separate coats 50/50 clear nitrate dope/thinner fuselage sanding lightly between coats Next spray three coats 30/70 nitrate clear/thinner over whole model sanding needed 600 grit paper Yep 30/70 correct need keep weight down coat Aerogloss Bonanza Blue sprayed color Cockpit lines India ink applied Rapidograph technical pen fin flash reflects Anglo-Saxon heritage Telco Flying read Telcos instructions Oper ating engine isnt hard just bit differ ent what may used shouldnt take over 60 seconds liquid CO-2 td run down through tiny inside diameter needle tank via also tiny tank inlet lay cylinder over level point downward first puncturing cartridge liquid CO-2 may freeze things open charge will lost prop received engine hole off-center check yours sturdy prop low pitch should able withstand very high rpm safely Using ready-made props best results achieved prop no-name CO-2 sold mail few years ago has diameter 5 course balsa prop would best doubt would break very often One-pound-test line will stand l0-g load safelythat model weighs 45 grams less cientswho actually used build models rather import cast themhave known build flying lines well Cloth lines can stretched out doped sanding between coats 600-grit Two thin coats dope need re duces line stretch flight problem also cuts line drag never hurts didnt bother natural lines approximately 010 015 diameter ever try measure cloth lines tried both 10 15-ft lengths 10-ft lines better prepared assist model just PAMPA folks big Precision Aerobatics models occasional whipping during maneuvers have gotten seven side Loops flight before lines started getting sticky Inside Square Loops recognizable Triangle Lazy Eight Inverted Flight have also done Clearly other maneuvers possible Short lines functional equivalent extra gram-power 40 grams what have work Warning girlfriend apparently cowed bark snarl throbbing Telco failed snap prop completely over Only bumping against compression resulted nice engine runbackwards Upon release Humm Bug responded normally negative thrust backing away fair pace Despite being first ca nard clockwise taxi effort realized what wrong kept full-down elevator Im glad happened private coupled times flying inverted ran out charge landed inverted atop copper motor feeder tube such low flying speeds low weight no damContinued page 164 June 1983 93 FULL*SIZE*PLANS 409 Fokker Spin III$825 FF Scale Early Fokker monoplane trainer 049 power 3 shts No 410Pober Pixie$1300 RC Multi-Scale 40 power 4-channels Can built sport flier Precision Scale depending detail added 2 shts No 411Humm Bug$175 CL 00-2-powered profile mite sport Stunt Gee Bee Model Y 40-powered RC stand-off scale great old-bree racers$500 Stiilelto CL Stool rrrodel McDonald winner 19761990 1902 PAl World Champs$375 Ole Reliable PC 70 oersinn 39 old-timer REM controls 19-25$425 Bloc Birds PC Ken Willards lorroation plane 4-ch 105375 crashmaster CL Crash-proof trainer 2 sizes15-30 35-40$125 Gee Bee RC Granger Williams magnificent Model Z br 40 engine$755 cap 29 40-powered scale PC French aerobatic plane Low wing tail-dragger 2 sheelo9750 Gee Bee Sr Sporlster PC t/vscale hp HaSke 91 power Prototypo span 3011 212 sheets$1175 Mini F-16 PC Sarpolas 049 dacted tan sport tIler tor 2-cE Balsa wings tail lose stroctare$275 Pegasus PC Watsons giant sopor sailplane tealores 1bps spoilers Ttail 164 wingspan9675 1930 Fleel Biplaee PC Sport Scale br 35-40 4-ch Wingspan 56 16 scale Two sheets$625 Drake II PC Ken Willards Ilping boat Icr 3-ch 15-power Pip trow land remosable gear$375 Taylor cob PC Don Stalls Schoolyard-Scale tot 049s 2-3 Ch Spans 50 in$350 Zephyr PC Small 2-cs glider hasd-laanch tow thermal slope soaring9299 Wasp VI PP Mike Stops Nato-winning Qaldoor HLG$190 Onestep PC Trainer has very forgining flying qoalities 3-ch. 10- 25 power$425 Merlyn PC Giant 155-is span Sailplane oses 3 PC channels$755 Maule Lanar Rocket PC 1/4-Scale spans 925 5-oh flaps 12 cv engine$1290 PIeces PP Indoor Easy B Robber-power contest-winner Op W Van Gorder$195 Sapercat PC Halt-A Pylon Racersport flier Aileron elenator control Poam wing$250 Seawaster PC Willards 40-size tlping hoar d-ch Strap-on gear tar landylanel 2 shts$1190 Space ShaBle II PC Larger improved version ot Has glider 3-oh$550 cAp-21 PC Giant-Scale Prench aerohatic craft spans 71/411 Qoadra power 2 sheets - 40091400 Stralo-Streak PC Old-Timer vemion Garamis tamoon 41 PP design tot power 2ch$500 Neighelon PC Low-wing tn-gear sportster power d-ch$500 Marlssa PP Robber-powered sportster Golden Age tradition$390 Snapshop Twin PC Workhorse atility/sport ship tot twin 30-40 4-h oh Poam wegs liOs t2lbs2shts$1198 Anrorna PC SportAerohatc flier tot 049-10 -power oses 2 or3 ch$350 Wiegnoaster CL Sport-Stanter Profile toselage sheet wings w hops$200 Mr Spook Ill PC Ply Sport Pylon Non/Sportsman Paoern sheet sport Uses d-ch. 20-40 pint$500 Mgpoboom CL t2A Combat ship large light saper performer$375 WilSIl ljawk 500 PP Hot Class AB Gas competition ship 111-23 power Nats-wrening design$375 Nosy FlIer PP Pobber-power sports flier captains Golden Age flavor Spans 26 in$300 caflisto 62 PC Ply sleek Pats-winning Sailplane AMA Mod Std Unlimited classes$795 Similar Alp PC Evans famous design retains 60-sz Pagern plane Petracts foam wing$550 Laser 200 PC Sport Scale replica championship Anrobatic tlinr Uses 40 power 4-h ch 2 shin$1075 czech Mate PP Cole low-wing spoester tot CO-2 powers spans 211 in$225 US Male PC Hoge gentle-flying biplane tot trainer sport Spans 90 Pot 60 engine 3-ch Two shIn$1450 Lii Gamble CL Nats-wroning Scale Pacer HOT lh power$325 christopher PC Sport Scale parachotistl Two-ch set hides torso mooes arms steer chore$425 Kinod King PC Redoced modernized sersion 011938 design lot Old-Timer 2 3 oh$450 Rain crow II PP High-podormance Goldoor Hand Laonched Glider$175 Sky Behy CL 12A Pacer Moose Scale Plans show Coo Black Widow Spans 18/4 V-fail$175 Lee-Richards PP Electric-powered 020 Scale ring-wing olde$350 Bell YPM-l Airacada CL Sport Scale profile twin tot posher reed-oalve 049s$325 Gee Bee R-1 PC HafIkes latest 1/4-scale spans 75 weighs 15 lb 90 larger Poor shts no dee$2225 Zephyr 1190 PC AMA Class B Sailplane 3-channel PC gear$675 Midi-Slow CL Pat-Pace-style Stoel trainer 20-power Profile$590 Royal Lancer PP Basic competition model tot AMA Clans sees staodard-pedormasce IS engines$550 ApeFP lombO Robber Scale Armnlrong-Whifworth research bplane md-Twentes$475 cub Floalplane PC Sport Scale tot 049-f 0-size engines 4-ch PC J-3 floats classic$650 Focke-ult 190 CL Profile Scale t2A power leatures onirtan engine moont realism$390 Regent Oneen Skies PC Poe-type biplane 40-60 power 4-channels 2 sheets$1390 Piper comanche CL Sport Scale ases twin 25s throOle control 2 sheets$625 Booing XPSB-1 PC Sport Scale power 2-3 channels$425 Re-Volt-Er PC electric-power sport tiler 2-channel 05 motOr$650 ininininin 3 Circle numbers plans wish order 131193225239262282291299302 307 I310 314326332343348354356358 362 365368370371372374375376377 378 3 379380382383385386388389390 392 1 393394395396397398399400401402 403404405406407408409410411 Please print Carefully Enclosed $ __- __ ___ __ ___ ____ __ ___ NAME __ __ ________ __ _ __ _____ STREET __ __ __ __ __________ __ __ ___ __ ___ ___ __ __ __ _ __ __ __ __ __ __ ____ __ __ __ __ __ STATE______ZIP7rder Price includes lirot-class postage Send check moneypayable Model Aviation AMA 1810 SamuBI Morse Dr neston VA 22090 ~.967fjnanything self-destruct engine fea tures chrome liner aluminum piston special ring Everything has proper fit engine doesnt tear itself apart well con tinues run after few ground-poundings well soon find out bccauhe limited number engines should out Memorial Day meets As message Howard Rushs fuel says 10% nitro fuel same can said about motor tests faster number props anything elsehut real world harsh place Combat equipment Charlie Johnson 3716 Ingrohom St San Diego CA 92109 CL Navy Carrier/Perry Continued page 87 problem Ron installed Acme battery holder C-size alkaline cell under canopy Class Guardian single cell would provide enough power three official flights withdut switch open circuit during high speed could used starting Acme battery holders available Sig photo month Glen Magrees 15-sized Wildcat model won Rocky Mountain Aeromodelers 15-class Carrier competition last fall high speed 65 mph stow speed 248 mph event has under develop ment since last summer Glen reports 10 12 models under way years tlying season rules event de scribed February issue Richard L Perry 7578 Vogels Way Spring Iteld VA 22135 Humm Bug/Dahike Continued page 93 age done although would avoid doing repeatedly cement happens helper can easily catch model simply cocking both arms up elbow level floor letting model coast tummy model decelerates quickly power fades typical lightlyloaded aircraft Lightly loaded lowpowered models may stall easily also recover readily tf line tension needed bend rudder add 010 020 shim behind engine give out board thrust alter line sweep crankshaft throttle controlled turning flat hex nut just behind prop raise lower dot 150 factory setting Sprint performance factory calls will give 78 grams thrust shorter period time would however generate power com plex vertical maneuvers Rotating cylin der 900 outward sidewinder con figuration slightly reduces required tip weight extra drag cylinder correctly placed am certain runs well position though seemed have irregularities runs may have due other causes further testing needed Have fun Humm Bug 164 Model Aviation No 131 No 193 No 225 No 239 No 262 No 282 No 291 No 299 No 392 No 307 No 310 No 214 No 326 No 332 No 343 No 340 No 354 No 356 No 350 No 362 No 369 No 369 No 370 No 371 No 372 No 374 No 375 No 376 No 377 No 376 No 379 No 209 No 202 No 382 No 305 No 286 No 380 No 389 No 390 No 392 No 393 No 394 No 395 No 396 No 397 No 398 No 399 No 490 No 401 No 402 No 403 No 4114 No 405 No 406 No 497 No 498 0 00 o 0 0 fv O IN 210 00 010 0. Eco sf
Edition: Model Aviation - 1983/06
Page Numbers: 90, 91, 92, 93, 164
CO-2 STUNT No will say youre copycat Although exactly common August 1948 issue Flying Models carried CO-2 Free Right model suggested movable controls might fitted fly Cl About two years later Frank Ehling powered early Stunters tiny CO-2 engine former kimer model engine company produced large CO-2 engine time Its walletcrunching greed fuel required 2-oz steel sparklet cartridge carried along gave flight new 0036 cu Telco 3000 offers CL FF fans clear advance Invertible gives 40 grams thrust medium power setting build Humm Bug 1 no noise crud mind-jangling flying sites come availablelike meeting room Rub-on dry transfers art supply store can used attractive decorations ordi nary decals too heavyl Odd angle balsa puslirod caused special bellcrank needed 90 Model Aviation FULL-SIZE PLANS AVAILABLE.SEE PAGE 164 -1 WRAP WITN004 A C H~ADD WASHERS fuir5~- ABUTTON E L CoFOR WEIBHT STUB--C--- h POWERED i----\LAIIINATE -TWS 032 PLY _z---------------PUSHROD 062 FIREWALL 052 PLYBAMBOO 2 REQUIREDDOWEL SEW GEAR TO ONEI 004 SOFT WIREFUSELAGE TAPER STA RTS4 FIREWALL WITHI fINSIDE ONL GOES DOW N TO I/B FLISELA5 56 NUT 00V-OOZ BRASS WASHER 032 FLY BUTTONS -- 001 BRASS WASHER PLY DOUBLING BUTTONS BUSH INGS 032 WASHER 005 WASiGB 2-56BOLT DOWN Ii iViSILK HINGESHORN DETAIL NOT SCALE Li -~TLi_ _ Li OIOBRASSHORN 1/16 SQ FACING STRIPS PIN WRUDDER SOFT WIRE ABIUSTS RUDDER 3/4 BIA 0123456 Inches HUMM BUG SPAN 21 AREA 55IN WE IGHT 45GRAIISMAX POWER TELCO{O6%J LOADING AOZS/SQ FT DESIGNED BY DOUG OAHLBE local library after club adjourns theres room heres model 2 can learn much about really building lightweight will hopefully cany over larger models 3 allows us blizzard-bound balsa builders keep hand flying lose lot controlling ability over win ter flying 4 Some Indoor modeling folks may have wanted try Con trol Line losing indoor comfort Heres chance 5 Sport fliers will find real change pace 6 makes unusually good trainer flights can shortened less 10 seconds 7 Malltype hobby shows great attract young beginners doing few simple stunts like loops inverted flight after just such display conceived Humm Bug 8 1 suspect Indoor Combat could flown A-in tissue streamers Wild Realize before start model no Jr Stilettonor last word genre offered starting point Lets build Humm Bug Its gas Construction full night leisure work should produce model Balsa 4 6-lb stock used fuselage Remember 6-lb stock 50% heavier 4-lb building 40-gram thrust level lack scale Model Aviation advertisers will sell plans making accurate $300 youre short time get scale right now re member three standard Daisey steel BBs weigh gram Put 81 BBs 27 grams smallest plastic bag have trim off excess tape shut simple teeter-totter balance can made using common yardstick balsa must balance BBs Cut fuselage shape core out least amount shownmore youre brave Make Warren-trussing strips material just removed identical density wood remaining fuse lage helps reduce warps Glue trussing place cyanoacrylate CyA notch out tank clearance leaving 1/16 around edge Cut out wing tail slots Allow extra 3/s trailing edge shift wing aft balance purposes Cut out both 1/32 ply tirewalls bend 032 wire gear single-wheel landing gear 025- 028 two-wheel setup larger firewall shown trainer version smaller single-wheel gear Sew gear firewall thread after notching clear ance Glue firewalls together glue dries pull 28 BBs neat little plastic bag teeter-totter balance find apiece 1/16 x 3 x 36 balsa does weigh June 1983 91 Model author gives better feel models sise 21-in span big 1A profiles gives great maneu verability CO-2 engine providing fraction typical 4As power extremely lightweight structure must Left Humm Bug has sleek profile reminiscent early 1950s CL planes especially Jim Walker A-J models Upright engine two-wheel gear best trainer version Right Silk hinges used author barely visible Dark spot inboard elevator top control horn Left All pieces before covering fuselage assembly Note Warren-trussing fuselage strength saving weight Right Special bellcrank seen bottom view get pivot point close planes center line Tip-weight box makes use washers nine grams sheet 79 grams giving 49 lb/cu ft density Cut out wing tail surfaces wood Round edges dont try airfoil flat-plate surfaces will cause warp cotton swab stick glued place connect elevators Install soft wire rudder hinges tip weight box Ep oxy firewall tiniest dabs pos sible Glue firewall gussets dry drill engine mount holes bellcrank 1/32 ply wee 1/32-in doubling buttons top side provide support bushings odd bellcrank gets pivot point close aircraft center line possible put ting hole fuselage first pushrod 3/32-in bamboo Overbuilding again next 1/16-in hard balsa dowel wire ends trimming Re sult 50% weight reduction Bind short music wire tips pushrod thread 004 copper wire glue Use white glue silk 7 hinges horn should have least 350 up down elevator Cover fuselage bamboo paper choice color shiny side out can substitute Ply Span Reason very little dope needed seal Old Timer Models California sells both Sig Mfg Co sells Ply Span Permanently borrow lightweight -in hollow plastic wheels old Sleek Streek rubber model whole plane can bought new 79 Serious builders will disdain such things build hollow spoked wheel mushy balsa bitsy 1/64 ply side buttons axle ride built weighed 2/3rds what Streek wheel weighs CyA glue wing place after moving body 3/16 outboard giving unequal panels tip weight box tiny lumpkin pine placed sideways partially balance lead-out drag provide tip skid single-wheel gear operation 048 id 098 eyelets standard Perfect Parts items easily lost beneath fingernails careless Temporary lead-outs 006 wire wrapped 004 copper wire Once sweep adjustment found discarded lines tied directly bellcrank component weights users accurate scales Telco 3000 TT prop 40g thrust Ca 4000 rpm 220 grams Telco 6000 TT prop 45g thrust @ 4500 rpm 260 grams Wing sanded bare 47 grams Wing painted minus controls 54 grams Trainer fuselage papered firewalls two-wheel gear fin paint 795 grams Fuselage above single-wheel gear lightweight nose 495 grams Tip weight box complete screw 3 gram Sleek Streek hollow plastic wheels 45 gram Hardwood rubber model wheels 1-in diameter 23 grams definite no-no properly built model needs neither nose nor tail weight can carve good propeller can probabiy reduce prop weight s lighter model the duration flight less power needed Depending grade wing wood used may notice some wing 92 Model Aviation Close-up adlustable lead-out system change line sweep just unplug eyelets move backward forward needed reinsert flex flight doubt affects flight bothers add 004 copper flying wires top bottomor V-braces 1/32 mushy balsa may have no idea badly us tend overbuild calculator pointed out interesting things like fact given length 045 wire has twice volume hence twice weight 032 wire Ohaus scale told four stock Telco mounting screws weigh total gram toolbox produced four re placements same length thinner weighed 42 gram 58% reduction course single-wheel gear half weight standard two wheels During point testing friend suggested try nose weight Reassemble needed add no weight current 396 grams have vertical takeoff capability medium power set ting despite warnings have managed produce embarrassingly heavy model suggest fit Cox 01 least will have something fly efforts although previouslymentioned advantages will lost Without braces 01 engine may shear wing Finish Brush three separate coats 50/50 clear nitrate dope/thinner fuselage sanding lightly between coats Next spray three coats 30/70 nitrate clear/thinner over whole model sanding needed 600 grit paper Yep 30/70 correct need keep weight down coat Aerogloss Bonanza Blue sprayed color Cockpit lines India ink applied Rapidograph technical pen fin flash reflects Anglo-Saxon heritage Telco Flying read Telcos instructions Oper ating engine isnt hard just bit differ ent what may used shouldnt take over 60 seconds liquid CO-2 td run down through tiny inside diameter needle tank via also tiny tank inlet lay cylinder over level point downward first puncturing cartridge liquid CO-2 may freeze things open charge will lost prop received engine hole off-center check yours sturdy prop low pitch should able withstand very high rpm safely Using ready-made props best results achieved prop no-name CO-2 sold mail few years ago has diameter 5 course balsa prop would best doubt would break very often One-pound-test line will stand l0-g load safelythat model weighs 45 grams less cientswho actually used build models rather import cast themhave known build flying lines well Cloth lines can stretched out doped sanding between coats 600-grit Two thin coats dope need re duces line stretch flight problem also cuts line drag never hurts didnt bother natural lines approximately 010 015 diameter ever try measure cloth lines tried both 10 15-ft lengths 10-ft lines better prepared assist model just PAMPA folks big Precision Aerobatics models occasional whipping during maneuvers have gotten seven side Loops flight before lines started getting sticky Inside Square Loops recognizable Triangle Lazy Eight Inverted Flight have also done Clearly other maneuvers possible Short lines functional equivalent extra gram-power 40 grams what have work Warning girlfriend apparently cowed bark snarl throbbing Telco failed snap prop completely over Only bumping against compression resulted nice engine runbackwards Upon release Humm Bug responded normally negative thrust backing away fair pace Despite being first ca nard clockwise taxi effort realized what wrong kept full-down elevator Im glad happened private coupled times flying inverted ran out charge landed inverted atop copper motor feeder tube such low flying speeds low weight no damContinued page 164 June 1983 93 FULL*SIZE*PLANS 409 Fokker Spin III$825 FF Scale Early Fokker monoplane trainer 049 power 3 shts No 410Pober Pixie$1300 RC Multi-Scale 40 power 4-channels Can built sport flier Precision Scale depending detail added 2 shts No 411Humm Bug$175 CL 00-2-powered profile mite sport Stunt Gee Bee Model Y 40-powered RC stand-off scale great old-bree racers$500 Stiilelto CL Stool rrrodel McDonald winner 19761990 1902 PAl World Champs$375 Ole Reliable PC 70 oersinn 39 old-timer REM controls 19-25$425 Bloc Birds PC Ken Willards lorroation plane 4-ch 105375 crashmaster CL Crash-proof trainer 2 sizes15-30 35-40$125 Gee Bee RC Granger Williams magnificent Model Z br 40 engine$755 cap 29 40-powered scale PC French aerobatic plane Low wing tail-dragger 2 sheelo9750 Gee Bee Sr Sporlster PC t/vscale hp HaSke 91 power Prototypo span 3011 212 sheets$1175 Mini F-16 PC Sarpolas 049 dacted tan sport tIler tor 2-cE Balsa wings tail lose stroctare$275 Pegasus PC Watsons giant sopor sailplane tealores 1bps spoilers Ttail 164 wingspan9675 1930 Fleel Biplaee PC Sport Scale br 35-40 4-ch Wingspan 56 16 scale Two sheets$625 Drake II PC Ken Willards Ilping boat Icr 3-ch 15-power Pip trow land remosable gear$375 Taylor cob PC Don Stalls Schoolyard-Scale tot 049s 2-3 Ch Spans 50 in$350 Zephyr PC Small 2-cs glider hasd-laanch tow thermal slope soaring9299 Wasp VI PP Mike Stops Nato-winning Qaldoor HLG$190 Onestep PC Trainer has very forgining flying qoalities 3-ch. 10- 25 power$425 Merlyn PC Giant 155-is span Sailplane oses 3 PC channels$755 Maule Lanar Rocket PC 1/4-Scale spans 925 5-oh flaps 12 cv engine$1290 PIeces PP Indoor Easy B Robber-power contest-winner Op W Van Gorder$195 Sapercat PC Halt-A Pylon Racersport flier Aileron elenator control Poam wing$250 Seawaster PC Willards 40-size tlping hoar d-ch Strap-on gear tar landylanel 2 shts$1190 Space ShaBle II PC Larger improved version ot Has glider 3-oh$550 cAp-21 PC Giant-Scale Prench aerohatic craft spans 71/411 Qoadra power 2 sheets - 40091400 Stralo-Streak PC Old-Timer vemion Garamis tamoon 41 PP design tot power 2ch$500 Neighelon PC Low-wing tn-gear sportster power d-ch$500 Marlssa PP Robber-powered sportster Golden Age tradition$390 Snapshop Twin PC Workhorse atility/sport ship tot twin 30-40 4-h oh Poam wegs liOs t2lbs2shts$1198 Anrorna PC SportAerohatc flier tot 049-10 -power oses 2 or3 ch$350 Wiegnoaster CL Sport-Stanter Profile toselage sheet wings w hops$200 Mr Spook Ill PC Ply Sport Pylon Non/Sportsman Paoern sheet sport Uses d-ch. 20-40 pint$500 Mgpoboom CL t2A Combat ship large light saper performer$375 WilSIl ljawk 500 PP Hot Class AB Gas competition ship 111-23 power Nats-wrening design$375 Nosy FlIer PP Pobber-power sports flier captains Golden Age flavor Spans 26 in$300 caflisto 62 PC Ply sleek Pats-winning Sailplane AMA Mod Std Unlimited classes$795 Similar Alp PC Evans famous design retains 60-sz Pagern plane Petracts foam wing$550 Laser 200 PC Sport Scale replica championship Anrobatic tlinr Uses 40 power 4-h ch 2 shin$1075 czech Mate PP Cole low-wing spoester tot CO-2 powers spans 211 in$225 US Male PC Hoge gentle-flying biplane tot trainer sport Spans 90 Pot 60 engine 3-ch Two shIn$1450 Lii Gamble CL Nats-wroning Scale Pacer HOT lh power$325 christopher PC Sport Scale parachotistl Two-ch set hides torso mooes arms steer chore$425 Kinod King PC Redoced modernized sersion 011938 design lot Old-Timer 2 3 oh$450 Rain crow II PP High-podormance Goldoor Hand Laonched Glider$175 Sky Behy CL 12A Pacer Moose Scale Plans show Coo Black Widow Spans 18/4 V-fail$175 Lee-Richards PP Electric-powered 020 Scale ring-wing olde$350 Bell YPM-l Airacada CL Sport Scale profile twin tot posher reed-oalve 049s$325 Gee Bee R-1 PC HafIkes latest 1/4-scale spans 75 weighs 15 lb 90 larger Poor shts no dee$2225 Zephyr 1190 PC AMA Class B Sailplane 3-channel PC gear$675 Midi-Slow CL Pat-Pace-style Stoel trainer 20-power Profile$590 Royal Lancer PP Basic competition model tot AMA Clans sees staodard-pedormasce IS engines$550 ApeFP lombO Robber Scale Armnlrong-Whifworth research bplane md-Twentes$475 cub Floalplane PC Sport Scale tot 049-f 0-size engines 4-ch PC J-3 floats classic$650 Focke-ult 190 CL Profile Scale t2A power leatures onirtan engine moont realism$390 Regent Oneen Skies PC Poe-type biplane 40-60 power 4-channels 2 sheets$1390 Piper comanche CL Sport Scale ases twin 25s throOle control 2 sheets$625 Booing XPSB-1 PC Sport Scale power 2-3 channels$425 Re-Volt-Er PC electric-power sport tiler 2-channel 05 motOr$650 ininininin 3 Circle numbers plans wish order 131193225239262282291299302 307 I310 314326332343348354356358 362 365368370371372374375376377 378 3 379380382383385386388389390 392 1 393394395396397398399400401402 403404405406407408409410411 Please print Carefully Enclosed $ __- __ ___ __ ___ ____ __ ___ NAME __ __ ________ __ _ __ _____ STREET __ __ __ __ __________ __ __ ___ __ ___ ___ __ __ __ _ __ __ __ __ __ __ ____ __ __ __ __ __ STATE______ZIP7rder Price includes lirot-class postage Send check moneypayable Model Aviation AMA 1810 SamuBI Morse Dr neston VA 22090 ~.967fjnanything self-destruct engine fea tures chrome liner aluminum piston special ring Everything has proper fit engine doesnt tear itself apart well con tinues run after few ground-poundings well soon find out bccauhe limited number engines should out Memorial Day meets As message Howard Rushs fuel says 10% nitro fuel same can said about motor tests faster number props anything elsehut real world harsh place Combat equipment Charlie Johnson 3716 Ingrohom St San Diego CA 92109 CL Navy Carrier/Perry Continued page 87 problem Ron installed Acme battery holder C-size alkaline cell under canopy Class Guardian single cell would provide enough power three official flights withdut switch open circuit during high speed could used starting Acme battery holders available Sig photo month Glen Magrees 15-sized Wildcat model won Rocky Mountain Aeromodelers 15-class Carrier competition last fall high speed 65 mph stow speed 248 mph event has under develop ment since last summer Glen reports 10 12 models under way years tlying season rules event de scribed February issue Richard L Perry 7578 Vogels Way Spring Iteld VA 22135 Humm Bug/Dahike Continued page 93 age done although would avoid doing repeatedly cement happens helper can easily catch model simply cocking both arms up elbow level floor letting model coast tummy model decelerates quickly power fades typical lightlyloaded aircraft Lightly loaded lowpowered models may stall easily also recover readily tf line tension needed bend rudder add 010 020 shim behind engine give out board thrust alter line sweep crankshaft throttle controlled turning flat hex nut just behind prop raise lower dot 150 factory setting Sprint performance factory calls will give 78 grams thrust shorter period time would however generate power com plex vertical maneuvers Rotating cylin der 900 outward sidewinder con figuration slightly reduces required tip weight extra drag cylinder correctly placed am certain runs well position though seemed have irregularities runs may have due other causes further testing needed Have fun Humm Bug 164 Model Aviation No 131 No 193 No 225 No 239 No 262 No 282 No 291 No 299 No 392 No 307 No 310 No 214 No 326 No 332 No 343 No 340 No 354 No 356 No 350 No 362 No 369 No 369 No 370 No 371 No 372 No 374 No 375 No 376 No 377 No 376 No 379 No 209 No 202 No 382 No 305 No 286 No 380 No 389 No 390 No 392 No 393 No 394 No 395 No 396 No 397 No 398 No 399 No 490 No 401 No 402 No 403 No 4114 No 405 No 406 No 497 No 498 0 00 o 0 0 fv O IN 210 00 010 0. Eco sf
Edition: Model Aviation - 1983/06
Page Numbers: 90, 91, 92, 93, 164
CO-2 STUNT No will say youre copycat Although exactly common August 1948 issue Flying Models carried CO-2 Free Right model suggested movable controls might fitted fly Cl About two years later Frank Ehling powered early Stunters tiny CO-2 engine former kimer model engine company produced large CO-2 engine time Its walletcrunching greed fuel required 2-oz steel sparklet cartridge carried along gave flight new 0036 cu Telco 3000 offers CL FF fans clear advance Invertible gives 40 grams thrust medium power setting build Humm Bug 1 no noise crud mind-jangling flying sites come availablelike meeting room Rub-on dry transfers art supply store can used attractive decorations ordi nary decals too heavyl Odd angle balsa puslirod caused special bellcrank needed 90 Model Aviation FULL-SIZE PLANS AVAILABLE.SEE PAGE 164 -1 WRAP WITN004 A C H~ADD WASHERS fuir5~- ABUTTON E L CoFOR WEIBHT STUB--C--- h POWERED i----\LAIIINATE -TWS 032 PLY _z---------------PUSHROD 062 FIREWALL 052 PLYBAMBOO 2 REQUIREDDOWEL SEW GEAR TO ONEI 004 SOFT WIREFUSELAGE TAPER STA RTS4 FIREWALL WITHI fINSIDE ONL GOES DOW N TO I/B FLISELA5 56 NUT 00V-OOZ BRASS WASHER 032 FLY BUTTONS -- 001 BRASS WASHER PLY DOUBLING BUTTONS BUSH INGS 032 WASHER 005 WASiGB 2-56BOLT DOWN Ii iViSILK HINGESHORN DETAIL NOT SCALE Li -~TLi_ _ Li OIOBRASSHORN 1/16 SQ FACING STRIPS PIN WRUDDER SOFT WIRE ABIUSTS RUDDER 3/4 BIA 0123456 Inches HUMM BUG SPAN 21 AREA 55IN WE IGHT 45GRAIISMAX POWER TELCO{O6%J LOADING AOZS/SQ FT DESIGNED BY DOUG OAHLBE local library after club adjourns theres room heres model 2 can learn much about really building lightweight will hopefully cany over larger models 3 allows us blizzard-bound balsa builders keep hand flying lose lot controlling ability over win ter flying 4 Some Indoor modeling folks may have wanted try Con trol Line losing indoor comfort Heres chance 5 Sport fliers will find real change pace 6 makes unusually good trainer flights can shortened less 10 seconds 7 Malltype hobby shows great attract young beginners doing few simple stunts like loops inverted flight after just such display conceived Humm Bug 8 1 suspect Indoor Combat could flown A-in tissue streamers Wild Realize before start model no Jr Stilettonor last word genre offered starting point Lets build Humm Bug Its gas Construction full night leisure work should produce model Balsa 4 6-lb stock used fuselage Remember 6-lb stock 50% heavier 4-lb building 40-gram thrust level lack scale Model Aviation advertisers will sell plans making accurate $300 youre short time get scale right now re member three standard Daisey steel BBs weigh gram Put 81 BBs 27 grams smallest plastic bag have trim off excess tape shut simple teeter-totter balance can made using common yardstick balsa must balance BBs Cut fuselage shape core out least amount shownmore youre brave Make Warren-trussing strips material just removed identical density wood remaining fuse lage helps reduce warps Glue trussing place cyanoacrylate CyA notch out tank clearance leaving 1/16 around edge Cut out wing tail slots Allow extra 3/s trailing edge shift wing aft balance purposes Cut out both 1/32 ply tirewalls bend 032 wire gear single-wheel landing gear 025- 028 two-wheel setup larger firewall shown trainer version smaller single-wheel gear Sew gear firewall thread after notching clear ance Glue firewalls together glue dries pull 28 BBs neat little plastic bag teeter-totter balance find apiece 1/16 x 3 x 36 balsa does weigh June 1983 91 Model author gives better feel models sise 21-in span big 1A profiles gives great maneu verability CO-2 engine providing fraction typical 4As power extremely lightweight structure must Left Humm Bug has sleek profile reminiscent early 1950s CL planes especially Jim Walker A-J models Upright engine two-wheel gear best trainer version Right Silk hinges used author barely visible Dark spot inboard elevator top control horn Left All pieces before covering fuselage assembly Note Warren-trussing fuselage strength saving weight Right Special bellcrank seen bottom view get pivot point close planes center line Tip-weight box makes use washers nine grams sheet 79 grams giving 49 lb/cu ft density Cut out wing tail surfaces wood Round edges dont try airfoil flat-plate surfaces will cause warp cotton swab stick glued place connect elevators Install soft wire rudder hinges tip weight box Ep oxy firewall tiniest dabs pos sible Glue firewall gussets dry drill engine mount holes bellcrank 1/32 ply wee 1/32-in doubling buttons top side provide support bushings odd bellcrank gets pivot point close aircraft center line possible put ting hole fuselage first pushrod 3/32-in bamboo Overbuilding again next 1/16-in hard balsa dowel wire ends trimming Re sult 50% weight reduction Bind short music wire tips pushrod thread 004 copper wire glue Use white glue silk 7 hinges horn should have least 350 up down elevator Cover fuselage bamboo paper choice color shiny side out can substitute Ply Span Reason very little dope needed seal Old Timer Models California sells both Sig Mfg Co sells Ply Span Permanently borrow lightweight -in hollow plastic wheels old Sleek Streek rubber model whole plane can bought new 79 Serious builders will disdain such things build hollow spoked wheel mushy balsa bitsy 1/64 ply side buttons axle ride built weighed 2/3rds what Streek wheel weighs CyA glue wing place after moving body 3/16 outboard giving unequal panels tip weight box tiny lumpkin pine placed sideways partially balance lead-out drag provide tip skid single-wheel gear operation 048 id 098 eyelets standard Perfect Parts items easily lost beneath fingernails careless Temporary lead-outs 006 wire wrapped 004 copper wire Once sweep adjustment found discarded lines tied directly bellcrank component weights users accurate scales Telco 3000 TT prop 40g thrust Ca 4000 rpm 220 grams Telco 6000 TT prop 45g thrust @ 4500 rpm 260 grams Wing sanded bare 47 grams Wing painted minus controls 54 grams Trainer fuselage papered firewalls two-wheel gear fin paint 795 grams Fuselage above single-wheel gear lightweight nose 495 grams Tip weight box complete screw 3 gram Sleek Streek hollow plastic wheels 45 gram Hardwood rubber model wheels 1-in diameter 23 grams definite no-no properly built model needs neither nose nor tail weight can carve good propeller can probabiy reduce prop weight s lighter model the duration flight less power needed Depending grade wing wood used may notice some wing 92 Model Aviation Close-up adlustable lead-out system change line sweep just unplug eyelets move backward forward needed reinsert flex flight doubt affects flight bothers add 004 copper flying wires top bottomor V-braces 1/32 mushy balsa may have no idea badly us tend overbuild calculator pointed out interesting things like fact given length 045 wire has twice volume hence twice weight 032 wire Ohaus scale told four stock Telco mounting screws weigh total gram toolbox produced four re placements same length thinner weighed 42 gram 58% reduction course single-wheel gear half weight standard two wheels During point testing friend suggested try nose weight Reassemble needed add no weight current 396 grams have vertical takeoff capability medium power set ting despite warnings have managed produce embarrassingly heavy model suggest fit Cox 01 least will have something fly efforts although previouslymentioned advantages will lost Without braces 01 engine may shear wing Finish Brush three separate coats 50/50 clear nitrate dope/thinner fuselage sanding lightly between coats Next spray three coats 30/70 nitrate clear/thinner over whole model sanding needed 600 grit paper Yep 30/70 correct need keep weight down coat Aerogloss Bonanza Blue sprayed color Cockpit lines India ink applied Rapidograph technical pen fin flash reflects Anglo-Saxon heritage Telco Flying read Telcos instructions Oper ating engine isnt hard just bit differ ent what may used shouldnt take over 60 seconds liquid CO-2 td run down through tiny inside diameter needle tank via also tiny tank inlet lay cylinder over level point downward first puncturing cartridge liquid CO-2 may freeze things open charge will lost prop received engine hole off-center check yours sturdy prop low pitch should able withstand very high rpm safely Using ready-made props best results achieved prop no-name CO-2 sold mail few years ago has diameter 5 course balsa prop would best doubt would break very often One-pound-test line will stand l0-g load safelythat model weighs 45 grams less cientswho actually used build models rather import cast themhave known build flying lines well Cloth lines can stretched out doped sanding between coats 600-grit Two thin coats dope need re duces line stretch flight problem also cuts line drag never hurts didnt bother natural lines approximately 010 015 diameter ever try measure cloth lines tried both 10 15-ft lengths 10-ft lines better prepared assist model just PAMPA folks big Precision Aerobatics models occasional whipping during maneuvers have gotten seven side Loops flight before lines started getting sticky Inside Square Loops recognizable Triangle Lazy Eight Inverted Flight have also done Clearly other maneuvers possible Short lines functional equivalent extra gram-power 40 grams what have work Warning girlfriend apparently cowed bark snarl throbbing Telco failed snap prop completely over Only bumping against compression resulted nice engine runbackwards Upon release Humm Bug responded normally negative thrust backing away fair pace Despite being first ca nard clockwise taxi effort realized what wrong kept full-down elevator Im glad happened private coupled times flying inverted ran out charge landed inverted atop copper motor feeder tube such low flying speeds low weight no damContinued page 164 June 1983 93 FULL*SIZE*PLANS 409 Fokker Spin III$825 FF Scale Early Fokker monoplane trainer 049 power 3 shts No 410Pober Pixie$1300 RC Multi-Scale 40 power 4-channels Can built sport flier Precision Scale depending detail added 2 shts No 411Humm Bug$175 CL 00-2-powered profile mite sport Stunt Gee Bee Model Y 40-powered RC stand-off scale great old-bree racers$500 Stiilelto CL Stool rrrodel McDonald winner 19761990 1902 PAl World Champs$375 Ole Reliable PC 70 oersinn 39 old-timer REM controls 19-25$425 Bloc Birds PC Ken Willards lorroation plane 4-ch 105375 crashmaster CL Crash-proof trainer 2 sizes15-30 35-40$125 Gee Bee RC Granger Williams magnificent Model Z br 40 engine$755 cap 29 40-powered scale PC French aerobatic plane Low wing tail-dragger 2 sheelo9750 Gee Bee Sr Sporlster PC t/vscale hp HaSke 91 power Prototypo span 3011 212 sheets$1175 Mini F-16 PC Sarpolas 049 dacted tan sport tIler tor 2-cE Balsa wings tail lose stroctare$275 Pegasus PC Watsons giant sopor sailplane tealores 1bps spoilers Ttail 164 wingspan9675 1930 Fleel Biplaee PC Sport Scale br 35-40 4-ch Wingspan 56 16 scale Two sheets$625 Drake II PC Ken Willards Ilping boat Icr 3-ch 15-power Pip trow land remosable gear$375 Taylor cob PC Don Stalls Schoolyard-Scale tot 049s 2-3 Ch Spans 50 in$350 Zephyr PC Small 2-cs glider hasd-laanch tow thermal slope soaring9299 Wasp VI PP Mike Stops Nato-winning Qaldoor HLG$190 Onestep PC Trainer has very forgining flying qoalities 3-ch. 10- 25 power$425 Merlyn PC Giant 155-is span Sailplane oses 3 PC channels$755 Maule Lanar Rocket PC 1/4-Scale spans 925 5-oh flaps 12 cv engine$1290 PIeces PP Indoor Easy B Robber-power contest-winner Op W Van Gorder$195 Sapercat PC Halt-A Pylon Racersport flier Aileron elenator control Poam wing$250 Seawaster PC Willards 40-size tlping hoar d-ch Strap-on gear tar landylanel 2 shts$1190 Space ShaBle II PC Larger improved version ot Has glider 3-oh$550 cAp-21 PC Giant-Scale Prench aerohatic craft spans 71/411 Qoadra power 2 sheets - 40091400 Stralo-Streak PC Old-Timer vemion Garamis tamoon 41 PP design tot power 2ch$500 Neighelon PC Low-wing tn-gear sportster power d-ch$500 Marlssa PP Robber-powered sportster Golden Age tradition$390 Snapshop Twin PC Workhorse atility/sport ship tot twin 30-40 4-h oh Poam wegs liOs t2lbs2shts$1198 Anrorna PC SportAerohatc flier tot 049-10 -power oses 2 or3 ch$350 Wiegnoaster CL Sport-Stanter Profile toselage sheet wings w hops$200 Mr Spook Ill PC Ply Sport Pylon Non/Sportsman Paoern sheet sport Uses d-ch. 20-40 pint$500 Mgpoboom CL t2A Combat ship large light saper performer$375 WilSIl ljawk 500 PP Hot Class AB Gas competition ship 111-23 power Nats-wrening design$375 Nosy FlIer PP Pobber-power sports flier captains Golden Age flavor Spans 26 in$300 caflisto 62 PC Ply sleek Pats-winning Sailplane AMA Mod Std Unlimited classes$795 Similar Alp PC Evans famous design retains 60-sz Pagern plane Petracts foam wing$550 Laser 200 PC Sport Scale replica championship Anrobatic tlinr Uses 40 power 4-h ch 2 shin$1075 czech Mate PP Cole low-wing spoester tot CO-2 powers spans 211 in$225 US Male PC Hoge gentle-flying biplane tot trainer sport Spans 90 Pot 60 engine 3-ch Two shIn$1450 Lii Gamble CL Nats-wroning Scale Pacer HOT lh power$325 christopher PC Sport Scale parachotistl Two-ch set hides torso mooes arms steer chore$425 Kinod King PC Redoced modernized sersion 011938 design lot Old-Timer 2 3 oh$450 Rain crow II PP High-podormance Goldoor Hand Laonched Glider$175 Sky Behy CL 12A Pacer Moose Scale Plans show Coo Black Widow Spans 18/4 V-fail$175 Lee-Richards PP Electric-powered 020 Scale ring-wing olde$350 Bell YPM-l Airacada CL Sport Scale profile twin tot posher reed-oalve 049s$325 Gee Bee R-1 PC HafIkes latest 1/4-scale spans 75 weighs 15 lb 90 larger Poor shts no dee$2225 Zephyr 1190 PC AMA Class B Sailplane 3-channel PC gear$675 Midi-Slow CL Pat-Pace-style Stoel trainer 20-power Profile$590 Royal Lancer PP Basic competition model tot AMA Clans sees staodard-pedormasce IS engines$550 ApeFP lombO Robber Scale Armnlrong-Whifworth research bplane md-Twentes$475 cub Floalplane PC Sport Scale tot 049-f 0-size engines 4-ch PC J-3 floats classic$650 Focke-ult 190 CL Profile Scale t2A power leatures onirtan engine moont realism$390 Regent Oneen Skies PC Poe-type biplane 40-60 power 4-channels 2 sheets$1390 Piper comanche CL Sport Scale ases twin 25s throOle control 2 sheets$625 Booing XPSB-1 PC Sport Scale power 2-3 channels$425 Re-Volt-Er PC electric-power sport tiler 2-channel 05 motOr$650 ininininin 3 Circle numbers plans wish order 131193225239262282291299302 307 I310 314326332343348354356358 362 365368370371372374375376377 378 3 379380382383385386388389390 392 1 393394395396397398399400401402 403404405406407408409410411 Please print Carefully Enclosed $ __- __ ___ __ ___ ____ __ ___ NAME __ __ ________ __ _ __ _____ STREET __ __ __ __ __________ __ __ ___ __ ___ ___ __ __ __ _ __ __ __ __ __ __ ____ __ __ __ __ __ STATE______ZIP7rder Price includes lirot-class postage Send check moneypayable Model Aviation AMA 1810 SamuBI Morse Dr neston VA 22090 ~.967fjnanything self-destruct engine fea tures chrome liner aluminum piston special ring Everything has proper fit engine doesnt tear itself apart well con tinues run after few ground-poundings well soon find out bccauhe limited number engines should out Memorial Day meets As message Howard Rushs fuel says 10% nitro fuel same can said about motor tests faster number props anything elsehut real world harsh place Combat equipment Charlie Johnson 3716 Ingrohom St San Diego CA 92109 CL Navy Carrier/Perry Continued page 87 problem Ron installed Acme battery holder C-size alkaline cell under canopy Class Guardian single cell would provide enough power three official flights withdut switch open circuit during high speed could used starting Acme battery holders available Sig photo month Glen Magrees 15-sized Wildcat model won Rocky Mountain Aeromodelers 15-class Carrier competition last fall high speed 65 mph stow speed 248 mph event has under develop ment since last summer Glen reports 10 12 models under way years tlying season rules event de scribed February issue Richard L Perry 7578 Vogels Way Spring Iteld VA 22135 Humm Bug/Dahike Continued page 93 age done although would avoid doing repeatedly cement happens helper can easily catch model simply cocking both arms up elbow level floor letting model coast tummy model decelerates quickly power fades typical lightlyloaded aircraft Lightly loaded lowpowered models may stall easily also recover readily tf line tension needed bend rudder add 010 020 shim behind engine give out board thrust alter line sweep crankshaft throttle controlled turning flat hex nut just behind prop raise lower dot 150 factory setting Sprint performance factory calls will give 78 grams thrust shorter period time would however generate power com plex vertical maneuvers Rotating cylin der 900 outward sidewinder con figuration slightly reduces required tip weight extra drag cylinder correctly placed am certain runs well position though seemed have irregularities runs may have due other causes further testing needed Have fun Humm Bug 164 Model Aviation No 131 No 193 No 225 No 239 No 262 No 282 No 291 No 299 No 392 No 307 No 310 No 214 No 326 No 332 No 343 No 340 No 354 No 356 No 350 No 362 No 369 No 369 No 370 No 371 No 372 No 374 No 375 No 376 No 377 No 376 No 379 No 209 No 202 No 382 No 305 No 286 No 380 No 389 No 390 No 392 No 393 No 394 No 395 No 396 No 397 No 398 No 399 No 490 No 401 No 402 No 403 No 4114 No 405 No 406 No 497 No 498 0 00 o 0 0 fv O IN 210 00 010 0. Eco sf
Edition: Model Aviation - 1983/06
Page Numbers: 90, 91, 92, 93, 164
CO-2 STUNT No will say youre copycat Although exactly common August 1948 issue Flying Models carried CO-2 Free Right model suggested movable controls might fitted fly Cl About two years later Frank Ehling powered early Stunters tiny CO-2 engine former kimer model engine company produced large CO-2 engine time Its walletcrunching greed fuel required 2-oz steel sparklet cartridge carried along gave flight new 0036 cu Telco 3000 offers CL FF fans clear advance Invertible gives 40 grams thrust medium power setting build Humm Bug 1 no noise crud mind-jangling flying sites come availablelike meeting room Rub-on dry transfers art supply store can used attractive decorations ordi nary decals too heavyl Odd angle balsa puslirod caused special bellcrank needed 90 Model Aviation FULL-SIZE PLANS AVAILABLE.SEE PAGE 164 -1 WRAP WITN004 A C H~ADD WASHERS fuir5~- ABUTTON E L CoFOR WEIBHT STUB--C--- h POWERED i----\LAIIINATE -TWS 032 PLY _z---------------PUSHROD 062 FIREWALL 052 PLYBAMBOO 2 REQUIREDDOWEL SEW GEAR TO ONEI 004 SOFT WIREFUSELAGE TAPER STA RTS4 FIREWALL WITHI fINSIDE ONL GOES DOW N TO I/B FLISELA5 56 NUT 00V-OOZ BRASS WASHER 032 FLY BUTTONS -- 001 BRASS WASHER PLY DOUBLING BUTTONS BUSH INGS 032 WASHER 005 WASiGB 2-56BOLT DOWN Ii iViSILK HINGESHORN DETAIL NOT SCALE Li -~TLi_ _ Li OIOBRASSHORN 1/16 SQ FACING STRIPS PIN WRUDDER SOFT WIRE ABIUSTS RUDDER 3/4 BIA 0123456 Inches HUMM BUG SPAN 21 AREA 55IN WE IGHT 45GRAIISMAX POWER TELCO{O6%J LOADING AOZS/SQ FT DESIGNED BY DOUG OAHLBE local library after club adjourns theres room heres model 2 can learn much about really building lightweight will hopefully cany over larger models 3 allows us blizzard-bound balsa builders keep hand flying lose lot controlling ability over win ter flying 4 Some Indoor modeling folks may have wanted try Con trol Line losing indoor comfort Heres chance 5 Sport fliers will find real change pace 6 makes unusually good trainer flights can shortened less 10 seconds 7 Malltype hobby shows great attract young beginners doing few simple stunts like loops inverted flight after just such display conceived Humm Bug 8 1 suspect Indoor Combat could flown A-in tissue streamers Wild Realize before start model no Jr Stilettonor last word genre offered starting point Lets build Humm Bug Its gas Construction full night leisure work should produce model Balsa 4 6-lb stock used fuselage Remember 6-lb stock 50% heavier 4-lb building 40-gram thrust level lack scale Model Aviation advertisers will sell plans making accurate $300 youre short time get scale right now re member three standard Daisey steel BBs weigh gram Put 81 BBs 27 grams smallest plastic bag have trim off excess tape shut simple teeter-totter balance can made using common yardstick balsa must balance BBs Cut fuselage shape core out least amount shownmore youre brave Make Warren-trussing strips material just removed identical density wood remaining fuse lage helps reduce warps Glue trussing place cyanoacrylate CyA notch out tank clearance leaving 1/16 around edge Cut out wing tail slots Allow extra 3/s trailing edge shift wing aft balance purposes Cut out both 1/32 ply tirewalls bend 032 wire gear single-wheel landing gear 025- 028 two-wheel setup larger firewall shown trainer version smaller single-wheel gear Sew gear firewall thread after notching clear ance Glue firewalls together glue dries pull 28 BBs neat little plastic bag teeter-totter balance find apiece 1/16 x 3 x 36 balsa does weigh June 1983 91 Model author gives better feel models sise 21-in span big 1A profiles gives great maneu verability CO-2 engine providing fraction typical 4As power extremely lightweight structure must Left Humm Bug has sleek profile reminiscent early 1950s CL planes especially Jim Walker A-J models Upright engine two-wheel gear best trainer version Right Silk hinges used author barely visible Dark spot inboard elevator top control horn Left All pieces before covering fuselage assembly Note Warren-trussing fuselage strength saving weight Right Special bellcrank seen bottom view get pivot point close planes center line Tip-weight box makes use washers nine grams sheet 79 grams giving 49 lb/cu ft density Cut out wing tail surfaces wood Round edges dont try airfoil flat-plate surfaces will cause warp cotton swab stick glued place connect elevators Install soft wire rudder hinges tip weight box Ep oxy firewall tiniest dabs pos sible Glue firewall gussets dry drill engine mount holes bellcrank 1/32 ply wee 1/32-in doubling buttons top side provide support bushings odd bellcrank gets pivot point close aircraft center line possible put ting hole fuselage first pushrod 3/32-in bamboo Overbuilding again next 1/16-in hard balsa dowel wire ends trimming Re sult 50% weight reduction Bind short music wire tips pushrod thread 004 copper wire glue Use white glue silk 7 hinges horn should have least 350 up down elevator Cover fuselage bamboo paper choice color shiny side out can substitute Ply Span Reason very little dope needed seal Old Timer Models California sells both Sig Mfg Co sells Ply Span Permanently borrow lightweight -in hollow plastic wheels old Sleek Streek rubber model whole plane can bought new 79 Serious builders will disdain such things build hollow spoked wheel mushy balsa bitsy 1/64 ply side buttons axle ride built weighed 2/3rds what Streek wheel weighs CyA glue wing place after moving body 3/16 outboard giving unequal panels tip weight box tiny lumpkin pine placed sideways partially balance lead-out drag provide tip skid single-wheel gear operation 048 id 098 eyelets standard Perfect Parts items easily lost beneath fingernails careless Temporary lead-outs 006 wire wrapped 004 copper wire Once sweep adjustment found discarded lines tied directly bellcrank component weights users accurate scales Telco 3000 TT prop 40g thrust Ca 4000 rpm 220 grams Telco 6000 TT prop 45g thrust @ 4500 rpm 260 grams Wing sanded bare 47 grams Wing painted minus controls 54 grams Trainer fuselage papered firewalls two-wheel gear fin paint 795 grams Fuselage above single-wheel gear lightweight nose 495 grams Tip weight box complete screw 3 gram Sleek Streek hollow plastic wheels 45 gram Hardwood rubber model wheels 1-in diameter 23 grams definite no-no properly built model needs neither nose nor tail weight can carve good propeller can probabiy reduce prop weight s lighter model the duration flight less power needed Depending grade wing wood used may notice some wing 92 Model Aviation Close-up adlustable lead-out system change line sweep just unplug eyelets move backward forward needed reinsert flex flight doubt affects flight bothers add 004 copper flying wires top bottomor V-braces 1/32 mushy balsa may have no idea badly us tend overbuild calculator pointed out interesting things like fact given length 045 wire has twice volume hence twice weight 032 wire Ohaus scale told four stock Telco mounting screws weigh total gram toolbox produced four re placements same length thinner weighed 42 gram 58% reduction course single-wheel gear half weight standard two wheels During point testing friend suggested try nose weight Reassemble needed add no weight current 396 grams have vertical takeoff capability medium power set ting despite warnings have managed produce embarrassingly heavy model suggest fit Cox 01 least will have something fly efforts although previouslymentioned advantages will lost Without braces 01 engine may shear wing Finish Brush three separate coats 50/50 clear nitrate dope/thinner fuselage sanding lightly between coats Next spray three coats 30/70 nitrate clear/thinner over whole model sanding needed 600 grit paper Yep 30/70 correct need keep weight down coat Aerogloss Bonanza Blue sprayed color Cockpit lines India ink applied Rapidograph technical pen fin flash reflects Anglo-Saxon heritage Telco Flying read Telcos instructions Oper ating engine isnt hard just bit differ ent what may used shouldnt take over 60 seconds liquid CO-2 td run down through tiny inside diameter needle tank via also tiny tank inlet lay cylinder over level point downward first puncturing cartridge liquid CO-2 may freeze things open charge will lost prop received engine hole off-center check yours sturdy prop low pitch should able withstand very high rpm safely Using ready-made props best results achieved prop no-name CO-2 sold mail few years ago has diameter 5 course balsa prop would best doubt would break very often One-pound-test line will stand l0-g load safelythat model weighs 45 grams less cientswho actually used build models rather import cast themhave known build flying lines well Cloth lines can stretched out doped sanding between coats 600-grit Two thin coats dope need re duces line stretch flight problem also cuts line drag never hurts didnt bother natural lines approximately 010 015 diameter ever try measure cloth lines tried both 10 15-ft lengths 10-ft lines better prepared assist model just PAMPA folks big Precision Aerobatics models occasional whipping during maneuvers have gotten seven side Loops flight before lines started getting sticky Inside Square Loops recognizable Triangle Lazy Eight Inverted Flight have also done Clearly other maneuvers possible Short lines functional equivalent extra gram-power 40 grams what have work Warning girlfriend apparently cowed bark snarl throbbing Telco failed snap prop completely over Only bumping against compression resulted nice engine runbackwards Upon release Humm Bug responded normally negative thrust backing away fair pace Despite being first ca nard clockwise taxi effort realized what wrong kept full-down elevator Im glad happened private coupled times flying inverted ran out charge landed inverted atop copper motor feeder tube such low flying speeds low weight no damContinued page 164 June 1983 93 FULL*SIZE*PLANS 409 Fokker Spin III$825 FF Scale Early Fokker monoplane trainer 049 power 3 shts No 410Pober Pixie$1300 RC Multi-Scale 40 power 4-channels Can built sport flier Precision Scale depending detail added 2 shts No 411Humm Bug$175 CL 00-2-powered profile mite sport Stunt Gee Bee Model Y 40-powered RC stand-off scale great old-bree racers$500 Stiilelto CL Stool rrrodel McDonald winner 19761990 1902 PAl World Champs$375 Ole Reliable PC 70 oersinn 39 old-timer REM controls 19-25$425 Bloc Birds PC Ken Willards lorroation plane 4-ch 105375 crashmaster CL Crash-proof trainer 2 sizes15-30 35-40$125 Gee Bee RC Granger Williams magnificent Model Z br 40 engine$755 cap 29 40-powered scale PC French aerobatic plane Low wing tail-dragger 2 sheelo9750 Gee Bee Sr Sporlster PC t/vscale hp HaSke 91 power Prototypo span 3011 212 sheets$1175 Mini F-16 PC Sarpolas 049 dacted tan sport tIler tor 2-cE Balsa wings tail lose stroctare$275 Pegasus PC Watsons giant sopor sailplane tealores 1bps spoilers Ttail 164 wingspan9675 1930 Fleel Biplaee PC Sport Scale br 35-40 4-ch Wingspan 56 16 scale Two sheets$625 Drake II PC Ken Willards Ilping boat Icr 3-ch 15-power Pip trow land remosable gear$375 Taylor cob PC Don Stalls Schoolyard-Scale tot 049s 2-3 Ch Spans 50 in$350 Zephyr PC Small 2-cs glider hasd-laanch tow thermal slope soaring9299 Wasp VI PP Mike Stops Nato-winning Qaldoor HLG$190 Onestep PC Trainer has very forgining flying qoalities 3-ch. 10- 25 power$425 Merlyn PC Giant 155-is span Sailplane oses 3 PC channels$755 Maule Lanar Rocket PC 1/4-Scale spans 925 5-oh flaps 12 cv engine$1290 PIeces PP Indoor Easy B Robber-power contest-winner Op W Van Gorder$195 Sapercat PC Halt-A Pylon Racersport flier Aileron elenator control Poam wing$250 Seawaster PC Willards 40-size tlping hoar d-ch Strap-on gear tar landylanel 2 shts$1190 Space ShaBle II PC Larger improved version ot Has glider 3-oh$550 cAp-21 PC Giant-Scale Prench aerohatic craft spans 71/411 Qoadra power 2 sheets - 40091400 Stralo-Streak PC Old-Timer vemion Garamis tamoon 41 PP design tot power 2ch$500 Neighelon PC Low-wing tn-gear sportster power d-ch$500 Marlssa PP Robber-powered sportster Golden Age tradition$390 Snapshop Twin PC Workhorse atility/sport ship tot twin 30-40 4-h oh Poam wegs liOs t2lbs2shts$1198 Anrorna PC SportAerohatc flier tot 049-10 -power oses 2 or3 ch$350 Wiegnoaster CL Sport-Stanter Profile toselage sheet wings w hops$200 Mr Spook Ill PC Ply Sport Pylon Non/Sportsman Paoern sheet sport Uses d-ch. 20-40 pint$500 Mgpoboom CL t2A Combat ship large light saper performer$375 WilSIl ljawk 500 PP Hot Class AB Gas competition ship 111-23 power Nats-wrening design$375 Nosy FlIer PP Pobber-power sports flier captains Golden Age flavor Spans 26 in$300 caflisto 62 PC Ply sleek Pats-winning Sailplane AMA Mod Std Unlimited classes$795 Similar Alp PC Evans famous design retains 60-sz Pagern plane Petracts foam wing$550 Laser 200 PC Sport Scale replica championship Anrobatic tlinr Uses 40 power 4-h ch 2 shin$1075 czech Mate PP Cole low-wing spoester tot CO-2 powers spans 211 in$225 US Male PC Hoge gentle-flying biplane tot trainer sport Spans 90 Pot 60 engine 3-ch Two shIn$1450 Lii Gamble CL Nats-wroning Scale Pacer HOT lh power$325 christopher PC Sport Scale parachotistl Two-ch set hides torso mooes arms steer chore$425 Kinod King PC Redoced modernized sersion 011938 design lot Old-Timer 2 3 oh$450 Rain crow II PP High-podormance Goldoor Hand Laonched Glider$175 Sky Behy CL 12A Pacer Moose Scale Plans show Coo Black Widow Spans 18/4 V-fail$175 Lee-Richards PP Electric-powered 020 Scale ring-wing olde$350 Bell YPM-l Airacada CL Sport Scale profile twin tot posher reed-oalve 049s$325 Gee Bee R-1 PC HafIkes latest 1/4-scale spans 75 weighs 15 lb 90 larger Poor shts no dee$2225 Zephyr 1190 PC AMA Class B Sailplane 3-channel PC gear$675 Midi-Slow CL Pat-Pace-style Stoel trainer 20-power Profile$590 Royal Lancer PP Basic competition model tot AMA Clans sees staodard-pedormasce IS engines$550 ApeFP lombO Robber Scale Armnlrong-Whifworth research bplane md-Twentes$475 cub Floalplane PC Sport Scale tot 049-f 0-size engines 4-ch PC J-3 floats classic$650 Focke-ult 190 CL Profile Scale t2A power leatures onirtan engine moont realism$390 Regent Oneen Skies PC Poe-type biplane 40-60 power 4-channels 2 sheets$1390 Piper comanche CL Sport Scale ases twin 25s throOle control 2 sheets$625 Booing XPSB-1 PC Sport Scale power 2-3 channels$425 Re-Volt-Er PC electric-power sport tiler 2-channel 05 motOr$650 ininininin 3 Circle numbers plans wish order 131193225239262282291299302 307 I310 314326332343348354356358 362 365368370371372374375376377 378 3 379380382383385386388389390 392 1 393394395396397398399400401402 403404405406407408409410411 Please print Carefully Enclosed $ __- __ ___ __ ___ ____ __ ___ NAME __ __ ________ __ _ __ _____ STREET __ __ __ __ __________ __ __ ___ __ ___ ___ __ __ __ _ __ __ __ __ __ __ ____ __ __ __ __ __ STATE______ZIP7rder Price includes lirot-class postage Send check moneypayable Model Aviation AMA 1810 SamuBI Morse Dr neston VA 22090 ~.967fjnanything self-destruct engine fea tures chrome liner aluminum piston special ring Everything has proper fit engine doesnt tear itself apart well con tinues run after few ground-poundings well soon find out bccauhe limited number engines should out Memorial Day meets As message Howard Rushs fuel says 10% nitro fuel same can said about motor tests faster number props anything elsehut real world harsh place Combat equipment Charlie Johnson 3716 Ingrohom St San Diego CA 92109 CL Navy Carrier/Perry Continued page 87 problem Ron installed Acme battery holder C-size alkaline cell under canopy Class Guardian single cell would provide enough power three official flights withdut switch open circuit during high speed could used starting Acme battery holders available Sig photo month Glen Magrees 15-sized Wildcat model won Rocky Mountain Aeromodelers 15-class Carrier competition last fall high speed 65 mph stow speed 248 mph event has under develop ment since last summer Glen reports 10 12 models under way years tlying season rules event de scribed February issue Richard L Perry 7578 Vogels Way Spring Iteld VA 22135 Humm Bug/Dahike Continued page 93 age done although would avoid doing repeatedly cement happens helper can easily catch model simply cocking both arms up elbow level floor letting model coast tummy model decelerates quickly power fades typical lightlyloaded aircraft Lightly loaded lowpowered models may stall easily also recover readily tf line tension needed bend rudder add 010 020 shim behind engine give out board thrust alter line sweep crankshaft throttle controlled turning flat hex nut just behind prop raise lower dot 150 factory setting Sprint performance factory calls will give 78 grams thrust shorter period time would however generate power com plex vertical maneuvers Rotating cylin der 900 outward sidewinder con figuration slightly reduces required tip weight extra drag cylinder correctly placed am certain runs well position though seemed have irregularities runs may have due other causes further testing needed Have fun Humm Bug 164 Model Aviation No 131 No 193 No 225 No 239 No 262 No 282 No 291 No 299 No 392 No 307 No 310 No 214 No 326 No 332 No 343 No 340 No 354 No 356 No 350 No 362 No 369 No 369 No 370 No 371 No 372 No 374 No 375 No 376 No 377 No 376 No 379 No 209 No 202 No 382 No 305 No 286 No 380 No 389 No 390 No 392 No 393 No 394 No 395 No 396 No 397 No 398 No 399 No 490 No 401 No 402 No 403 No 4114 No 405 No 406 No 497 No 498 0 00 o 0 0 fv O IN 210 00 010 0. Eco sf