Radio Control Sportand Aerobatics Ron Van Putte HOT EPOXY epoxy microwaving contro versy heats up pun intended couple times past columns mentioned softened Part Dave Browns epoxy microwave oven epoxy became stiff editorial staff Model Aviation took exception pro cedure claiming toxic fumes could pro duced ran David Falkenhagen Sig Manufacturing Company Nats talked quite about heating Part epoxy microwave oven soften After Nats got letter Dave somewhat edited let ter follows After conversation Nats thought prudent double check epoxy situation supplier raw resin informed few things addition what discussed thought might like know turns Out pure epoxy resin tendency has crystallize over course time Purity sense means resin hasnt diluted other chemicals reduce its viscosity extend goes further told common diluent ep ichlorohydrate rather nasty com pound would also chemical could released secondary heating resin good news epoxy proba bly Dave Browns well uses very high pur ity base resin heated will give off no toxic fumes According suppliers chemist talked epoxy resins contain some epichlorohydrate resin makeup epoxy contains less 5 ppm parts per 42 Model Aviation 6 OL $OWI 8-k #&ts engine sot nth Oubt millionR VP usually runs around 2 ppm onknow adequate temperature averageto restore crystallized epoxy resin Any also interesting supplier holdshigher will probably melt the finished base resins temperature l5OFpolyethylene bottle prior bottle-filling operation As basis conversation Bob Green Bayertown PA another flier thinks anhedraled stabs look good Hl Re venger sports OS 61 FSR-ABC B&D air-operted retracts weighs seven pounds unique engine mount Hobby Shacks Supra Fiy kit gives virtuaily unlimited capabil- Robert Apfei Nicevilie FL newcomer RC building talents good ity adjust side- downthrust ones Midwest Aero Star 40 first attempt RC model Looks really great chemist will continue advise custom ers heat Part resin should become crys tallized future use hot water putting microwave 20-30 seconds will pose no health risk product Other manufacturers products may contain extenders other diluents might cause problem heatedmaybebut really cant say anything about product other own got thinking after conversation probably would good idea openly ad vertise name base resin supplier Model Aviation dont mind telling anyone one-to-one basis compe tition would would appreciate discretion manner please men tion supplier name column have very good product dont want compromised Just wanted let know Dave Brown isnt makes good epoxy Good luck column getting printed side comments Duke Fox Fox Manufacturing Co has never avoid unpopular stand thought right Thats put edito rial comment some recent Fox magazine ads about bothering further research quieting engines because could detect wide spread support must have received bunch letters because has apparently changed mind has continued work quieting engines Dukes research resulted letter AMA members via AMA chartered club points-ofcontact Since Im secretary Eglin Aero Modelers AMA Charter No 221 got letters Im going quote letter Project Hush report included greatest threat continued enjoy ment hobby aggravation nonmod elers music sweetly running motor have determined possible quiet present motors sufficiently sound noticed people couple hun dred feet away reduce noise level requires two al terations 1 Replacing propeller quieter 2 Installing effective aftermuffler am happy report Joe Zingali Zinger Props Chris Macbin Rev-Up Props request working quiet props Also Du-Bro Sullivan Products request both working aftermuffler kits Until new-generation aftermufflers props appear market may want try modi fying models per diagram No 1 believe results will surprise article culmination several months experiments conducted object producing substantially quieter running twocycle engine now available results hoped 1 come up supereffective muffler could sell make pro fit 2 make easy customers have quiet-running Fox motor would banned sound-sensitive fields save sus pense no luck item 1but fan tastic success item 2 able get Deluxe 40 running quiet distance 100 ft four-decibel rise over background 64 decibels very little loss performance effective ingredients use two pro pellers stacked front other crankshaft adding aftermuffler made polyethylene fuel bottle Continued page 137 Zamuaiazaa New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows Walk yet Fully Aerobatic Complete Kit 8998 7550 San Gabriel Road cadero CA 93422 486-1717 56 Wing 40 Length 40 Engine 4 lbs 4 CH Fiber Glass Fuse & Belly Pan Foam Wing & Stab Balsa & Plywood dies RId Preducts 112 Basis St Lafayette LA 70508 3181 232-7446 Oealer rnqurrres tnvrted Lets enjoy outdoorsin comfort Little World Comfort Hot Burning Summer Days --- / Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq ff Aa Bg aa muse it cur aa large want becasa add-on tarts double triple et6tIre olze ot Porla-Slrades go ava2able Addon units can uaed taler awdnga pat 0 COVV5 etcl TRAK-LOK-EYE KITS make easy use ymr PortsStrarle mith RN isuipped wits ercunted emrqry kadr canopy a along waterproot heat retecting matedol white steer top aidel wits swique key hole corner Ettlegs no granmeb has no center pole mere anewitle space ateaddle pmiotableoramedelaiplane ttatandsaknost7 loll strorrg 1 olaninesir poles can stand work iday under contort wind reaialurt tested 40 MPH MOVING SALE 15% OFF regular prices listed below Oct ito Dec 1 4M Co products PLEASE NOTE OUR NEW ADDRESS AND PHONE NUMBER BELOW Write call tor additional information 4M Cts producta Free literature avaitebla eae 15% Off aporbanur ModS PPR4-6Osseas53396 5386 UPS ompany Dept MEcesenryMedsiEPFR4-ffO$3296$2500 *8300 UPS 209 SW lucy AvenueAdd-A-SlredeModeIAFRA-eO929565254593 00 LtPS 5 5A5*51SOUPS BartIesvIlle OK 74003RNTr86-EyeKft$10005 550S15012P5 PhoneMasterCudOdere-Chedss Dealer Inqahies hisSed *975AVAILABLE AT AMERICAS6525 FINEST HOBBY SHOPS DISTRIBUTED BY Tiger Tail 4 New Deluxe Kit 16495 Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Betty Pan Foam Wing & Hwd Ask about Kit & Eng Combos 72 Wing 800 sq ELEVENTH ANNUAL MODEL HOBBY TRADE SHOW INDUSTRY MEMBERS ONLY AY JAN 8 1988 10AM 5PM GENERAL PUBLIC RDAY JAN 9 1988 10AM 6PM GENERAL PUBLIC AY JAN 10 1988 10AM 5PM SEE THE LATEST PRODUCTS AND VISIT WITH MAJOR MANUFACTURERS AND DISTRIBUTORS OF MODEL AIRCRAFT MODEL ENGINES GIANT RAFFLE MODEL BOATS RADIO CONTROL SYSTEMS SHOP MODEL CARS MODELING ACCESSORIES * POND R TRACK ADMISSION Adults $500 under 13- $300 IE%T WE%T under 6- free adult STATIC DISPLAY COMPETITION IN MANY CATEGORIES U1~IIILg] aiLswiI sI1~2U 4 ILiI eIe]miw1kTl zii — s] LdIS]k~I-IU [v32]Ufiiiui I_____INTERNATIONAL MODELER SHOW OFFICE PO Box 10127 Costa Mesa CA 92627 Ph 714 548-4700 grey 6 x 3 propeller using K&B Supersonic 1000 fuelall after having run six tanks fuel through engine black stuff stopped com ing out engine during third tank fuel monitored rpm performance Accutach II handiest tools kit problems faced heat 95 0F high humidity 80% high altitude 4500 ft above sea level excessive internal friction engine density altitude about 9000 ft factors conspired reduce weight oxygen inhaled cycle en gine internal combustion engines limited power can produced burning oxygen take can increase power reducing inter nal friction getting oxygen turbochargers increase power stuffing air engine Another facet problem above factors also reduce local air pressure airplane has fly faster lift its weight Sudden thought Electric pro pulsion systems dont lose power increased altitude rate see side-bar en gine fixes solved too-little-power prob lem After doing engine rework next test gave results Same head prop fuel no spring starter 16000 rpm Cox No 325 low-compression head supplied engine using gasket washer high-compression head added another 450 rpm plane now flew quite well able loop roll stall turn etc positive-G maneu vers fuel tanks fuel pickup arrangement prevents inverted flying negative-G maneu vers After flight engine wouldnt run Some bits grass gotten themselves engine holding reed valve open glued piece sponge firewall covering air inlet keep sueh junk Out engine should mention new Cox snap starter catalog No 333 works better its pre decessors cuts performance about 350 rpm used Calebs airplane because makes starting very simple tituck NY built model airplanes see nothing has changed except model air planes now RC instead rubber-powered Free Flight models George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aerobatics/Van Putte Continued page 43 Looking some flying buddies turned ________________________________________ Mark Gilbert Fairview ID neighbor Mark Stacking two propellers manner litis guiding member Franklin County tie strange appearance flies airRadio Controllers has built up small hobby shop service members fathers plane okay really does make substantial business Gilberts White Farm Equipment Sales difference sound unmuffled slightly & Service State Street Fairview ID Mark muffled engine propeller noise noticewas making up flatbed trailer fitted Out look le until muffler becomes reasonably effec like runway dressed RC air- eller becomes predominant planes local RC fliers could assemble und necessary quiet both propeller exhaust No metal muffler itself have tested comes anywhere near amount sound reduc tion little power loss standard muf fler six-ounce Sullivan polyethylene bottle coupled tail Again little strange appearance really does work some tuned-pipe silicone tubing 7A6-in ID %-in wall three inches long slipped over tail stock muffler six-ounce Sullivan fuel bottle just fine fuel bottle used eight -in holes drilled out side fairly evenly spaced doubt po sitioning holes significance quite assembly float about two dozen rodeo parade three nlghts sent out show RC aircraft public Calebs Upstart II added display think quantity variety models displayed impressive con sidering size village short time members have hobby fact parade rodeo pretty impressive too talked some members PRCA Profes sional Rodeo Cowboys Association consensus Famous Preston Night Rodeo best country besides being oldest night rodeo America Based sample say RC flour ishing rural America spite difficul ties think back mid-Thirties believe kid rural MatTo Duke Foxs report justice should look up club point-of-contact wanted whet appetite about significant effort Continued page 141 December 1987 137 RC Aerobatics/Van Putte Continued page 137 success As says reward would appreciate would rush club members buy fly Fox motors Its obvious few serious competitors have already done just Almost everyone used Fox engines Control Line Combat years Nats Ron Van Putte 111 Sleepy Oaks Rd Ft Wal ton Beach FL 32548 RC Scale/Wischers Continued page 45 craftsmanship time highquality home-built airplane exception convention judges needed nitpickers find flaws especially planes com posite construction Ultrasmooth surfaces high-gloss finishes would show slightest blemish almost airplane Hinge gaps small 716-in visible close range almost-invisible line marked canopy outlines result painstaking effort fitting joints Performance matched appearance Bob Heren deen flew Glassair RG through blistering aerobatic routine speeds up 300 mph slender fiberglass fuselage withstood violent maneuvers Apprehensive spectators us wond ered about limits someone must know por tion field loaded intensely beautiful high-performance custom-built air craft main focus interest during four days Oshkosh centers around antique classic aircraft areas find examples type used young active full-scale flight hundreds classes approximately half near-mint condition some recently restored betterthan-new Recently adopted finishing techniques materials give lustrous gloss factory probably never achieved new ma terials have much longer livesThis place see photograph famous Wacos Stinsons Fairchilds Stearmans Beechcrafts Pipers Taylorcrafts well one-ofa-kind airplanes such Rawdon SE5 reproduction worth trip Oshkosh just see Jenny air sunlight penetrat ing through its fabric final flight Dean Crises t91 1 Curtiss pusher now bound museum recent past Nats EAA conven tion have held same week early Au gust two events different dates 1987 other Scale modelers could enjoy both Now hear events may overlap again 1988 probably means RC Scale Nats will flown dur ing portion Oshkosh week great est number aircraft presentthe first weekend midweek Nats participants could finally arrive Oshkosh desirable show planes will have already departed opinion effort should made separate two events permanently Scale enthusiasts can attend bothpreferably least week between Given choice Scale modelers would select Oshkosh Nats Scale attendance suffers met numerous AMA members Oshkosh year some come Nats R/C-56 glue other columns Wilhold R/C-56 glue has recommended cement ing metal wood canopy fuselage plastic painted surface other unusual combinations Its advantages flexibility after curing continues grip under conditions vibration dries clear also useful representing riv ets simulated metal airplane have found metal panels have adhered subsurface R/C-56 very difficult remove afterward de stroying either panel subsurface ever some modelers have informed us RIC-56 available searched substi tute found Weldhond glue has similar properties Recently visit local hobby shop purchased four-ounce bottle R/C-56 glue shelf No scarcity does have higher price tag now before $3 R/C-56 also continues advertised mail order catalogs Weldbond found hobby shops well hardware stores four-ounce larger sizes Balsa selection stack balsa sheets find weight difference about three-to-one heaviest sheet weighs about three times much lightest Because large variation has practice weigh sheet soon after purchase marking end ball-point pen small postal scale gradu ated -oz increments will job pre fer use Pelouze darkroom balance ordinarily used proportioning photographic chemicals Itis graduated grains avoirdupois 4375 grains per ounce accuracy Most balsa sheets standard 4 x 36 permits direct comparison between sheets also between various thicknesses example thickness varies 21 weight varies same wood equal density threeinch-wide sheets marked twice once true weight again weight would four-inch-wide sheet avoids guess work afterward bother weighing balsa Y16-in %2-in sheet particular sheets will tually become wing skins prevents sit uation finished wing badly out balance model has inclination turn direction know no warps cause turn its very likely result wing half being heavier Building wing near-equal weight half-panel becomes simple matter adding weights sheets side assure somewhere near equal Its true model has heavy wing wants turn direction can com pensate flight using aileron trim control leveling wings However compensation effective speed As speed reduced ailerons lose effect heavy wing drops less desirable using Down elevator trim correct sta bilizer incorrect incidence During loop example heavy wing offset ailerons will cause model corkscrew speed varies throughout maneuver Pattern fliers much aware problems Scale modelers because precision flight utmost importance will bury bits metal such nails solder wing tips Scale models wings may well suited such treatment Flying Scale model allerons offset also induces drag undesirable especially ship marginal power possibility tip stall also increased alleron de SEE YOUR DEALER FIRST U cant help you can order direct us sending Ihe full price plus $200 handling fee 10 116W 19th St PO Box U 511E6 HigginsviIIe MO 64037 call 816 584-7121 U U U U U U U U U uEUUUUUUUUUEUUUUEUU December 1987 141
Edition: Model Aviation - 1987/12
Page Numbers: 42, 43, 137, 141
Radio Control Sportand Aerobatics Ron Van Putte HOT EPOXY epoxy microwaving contro versy heats up pun intended couple times past columns mentioned softened Part Dave Browns epoxy microwave oven epoxy became stiff editorial staff Model Aviation took exception pro cedure claiming toxic fumes could pro duced ran David Falkenhagen Sig Manufacturing Company Nats talked quite about heating Part epoxy microwave oven soften After Nats got letter Dave somewhat edited let ter follows After conversation Nats thought prudent double check epoxy situation supplier raw resin informed few things addition what discussed thought might like know turns Out pure epoxy resin tendency has crystallize over course time Purity sense means resin hasnt diluted other chemicals reduce its viscosity extend goes further told common diluent ep ichlorohydrate rather nasty com pound would also chemical could released secondary heating resin good news epoxy proba bly Dave Browns well uses very high pur ity base resin heated will give off no toxic fumes According suppliers chemist talked epoxy resins contain some epichlorohydrate resin makeup epoxy contains less 5 ppm parts per 42 Model Aviation 6 OL $OWI 8-k #&ts engine sot nth Oubt millionR VP usually runs around 2 ppm onknow adequate temperature averageto restore crystallized epoxy resin Any also interesting supplier holdshigher will probably melt the finished base resins temperature l5OFpolyethylene bottle prior bottle-filling operation As basis conversation Bob Green Bayertown PA another flier thinks anhedraled stabs look good Hl Re venger sports OS 61 FSR-ABC B&D air-operted retracts weighs seven pounds unique engine mount Hobby Shacks Supra Fiy kit gives virtuaily unlimited capabil- Robert Apfei Nicevilie FL newcomer RC building talents good ity adjust side- downthrust ones Midwest Aero Star 40 first attempt RC model Looks really great chemist will continue advise custom ers heat Part resin should become crys tallized future use hot water putting microwave 20-30 seconds will pose no health risk product Other manufacturers products may contain extenders other diluents might cause problem heatedmaybebut really cant say anything about product other own got thinking after conversation probably would good idea openly ad vertise name base resin supplier Model Aviation dont mind telling anyone one-to-one basis compe tition would would appreciate discretion manner please men tion supplier name column have very good product dont want compromised Just wanted let know Dave Brown isnt makes good epoxy Good luck column getting printed side comments Duke Fox Fox Manufacturing Co has never avoid unpopular stand thought right Thats put edito rial comment some recent Fox magazine ads about bothering further research quieting engines because could detect wide spread support must have received bunch letters because has apparently changed mind has continued work quieting engines Dukes research resulted letter AMA members via AMA chartered club points-ofcontact Since Im secretary Eglin Aero Modelers AMA Charter No 221 got letters Im going quote letter Project Hush report included greatest threat continued enjoy ment hobby aggravation nonmod elers music sweetly running motor have determined possible quiet present motors sufficiently sound noticed people couple hun dred feet away reduce noise level requires two al terations 1 Replacing propeller quieter 2 Installing effective aftermuffler am happy report Joe Zingali Zinger Props Chris Macbin Rev-Up Props request working quiet props Also Du-Bro Sullivan Products request both working aftermuffler kits Until new-generation aftermufflers props appear market may want try modi fying models per diagram No 1 believe results will surprise article culmination several months experiments conducted object producing substantially quieter running twocycle engine now available results hoped 1 come up supereffective muffler could sell make pro fit 2 make easy customers have quiet-running Fox motor would banned sound-sensitive fields save sus pense no luck item 1but fan tastic success item 2 able get Deluxe 40 running quiet distance 100 ft four-decibel rise over background 64 decibels very little loss performance effective ingredients use two pro pellers stacked front other crankshaft adding aftermuffler made polyethylene fuel bottle Continued page 137 Zamuaiazaa New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows Walk yet Fully Aerobatic Complete Kit 8998 7550 San Gabriel Road cadero CA 93422 486-1717 56 Wing 40 Length 40 Engine 4 lbs 4 CH Fiber Glass Fuse & Belly Pan Foam Wing & Stab Balsa & Plywood dies RId Preducts 112 Basis St Lafayette LA 70508 3181 232-7446 Oealer rnqurrres tnvrted Lets enjoy outdoorsin comfort Little World Comfort Hot Burning Summer Days --- / Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq ff Aa Bg aa muse it cur aa large want becasa add-on tarts double triple et6tIre olze ot Porla-Slrades go ava2able Addon units can uaed taler awdnga pat 0 COVV5 etcl TRAK-LOK-EYE KITS make easy use ymr PortsStrarle mith RN isuipped wits ercunted emrqry kadr canopy a along waterproot heat retecting matedol white steer top aidel wits swique key hole corner Ettlegs no granmeb has no center pole mere anewitle space ateaddle pmiotableoramedelaiplane ttatandsaknost7 loll strorrg 1 olaninesir poles can stand work iday under contort wind reaialurt tested 40 MPH MOVING SALE 15% OFF regular prices listed below Oct ito Dec 1 4M Co products PLEASE NOTE OUR NEW ADDRESS AND PHONE NUMBER BELOW Write call tor additional information 4M Cts producta Free literature avaitebla eae 15% Off aporbanur ModS PPR4-6Osseas53396 5386 UPS ompany Dept MEcesenryMedsiEPFR4-ffO$3296$2500 *8300 UPS 209 SW lucy AvenueAdd-A-SlredeModeIAFRA-eO929565254593 00 LtPS 5 5A5*51SOUPS BartIesvIlle OK 74003RNTr86-EyeKft$10005 550S15012P5 PhoneMasterCudOdere-Chedss Dealer Inqahies hisSed *975AVAILABLE AT AMERICAS6525 FINEST HOBBY SHOPS DISTRIBUTED BY Tiger Tail 4 New Deluxe Kit 16495 Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Betty Pan Foam Wing & Hwd Ask about Kit & Eng Combos 72 Wing 800 sq ELEVENTH ANNUAL MODEL HOBBY TRADE SHOW INDUSTRY MEMBERS ONLY AY JAN 8 1988 10AM 5PM GENERAL PUBLIC RDAY JAN 9 1988 10AM 6PM GENERAL PUBLIC AY JAN 10 1988 10AM 5PM SEE THE LATEST PRODUCTS AND VISIT WITH MAJOR MANUFACTURERS AND DISTRIBUTORS OF MODEL AIRCRAFT MODEL ENGINES GIANT RAFFLE MODEL BOATS RADIO CONTROL SYSTEMS SHOP MODEL CARS MODELING ACCESSORIES * POND R TRACK ADMISSION Adults $500 under 13- $300 IE%T WE%T under 6- free adult STATIC DISPLAY COMPETITION IN MANY CATEGORIES U1~IIILg] aiLswiI sI1~2U 4 ILiI eIe]miw1kTl zii — s] LdIS]k~I-IU [v32]Ufiiiui I_____INTERNATIONAL MODELER SHOW OFFICE PO Box 10127 Costa Mesa CA 92627 Ph 714 548-4700 grey 6 x 3 propeller using K&B Supersonic 1000 fuelall after having run six tanks fuel through engine black stuff stopped com ing out engine during third tank fuel monitored rpm performance Accutach II handiest tools kit problems faced heat 95 0F high humidity 80% high altitude 4500 ft above sea level excessive internal friction engine density altitude about 9000 ft factors conspired reduce weight oxygen inhaled cycle en gine internal combustion engines limited power can produced burning oxygen take can increase power reducing inter nal friction getting oxygen turbochargers increase power stuffing air engine Another facet problem above factors also reduce local air pressure airplane has fly faster lift its weight Sudden thought Electric pro pulsion systems dont lose power increased altitude rate see side-bar en gine fixes solved too-little-power prob lem After doing engine rework next test gave results Same head prop fuel no spring starter 16000 rpm Cox No 325 low-compression head supplied engine using gasket washer high-compression head added another 450 rpm plane now flew quite well able loop roll stall turn etc positive-G maneu vers fuel tanks fuel pickup arrangement prevents inverted flying negative-G maneu vers After flight engine wouldnt run Some bits grass gotten themselves engine holding reed valve open glued piece sponge firewall covering air inlet keep sueh junk Out engine should mention new Cox snap starter catalog No 333 works better its pre decessors cuts performance about 350 rpm used Calebs airplane because makes starting very simple tituck NY built model airplanes see nothing has changed except model air planes now RC instead rubber-powered Free Flight models George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aerobatics/Van Putte Continued page 43 Looking some flying buddies turned ________________________________________ Mark Gilbert Fairview ID neighbor Mark Stacking two propellers manner litis guiding member Franklin County tie strange appearance flies airRadio Controllers has built up small hobby shop service members fathers plane okay really does make substantial business Gilberts White Farm Equipment Sales difference sound unmuffled slightly & Service State Street Fairview ID Mark muffled engine propeller noise noticewas making up flatbed trailer fitted Out look le until muffler becomes reasonably effec like runway dressed RC air- eller becomes predominant planes local RC fliers could assemble und necessary quiet both propeller exhaust No metal muffler itself have tested comes anywhere near amount sound reduc tion little power loss standard muf fler six-ounce Sullivan polyethylene bottle coupled tail Again little strange appearance really does work some tuned-pipe silicone tubing 7A6-in ID %-in wall three inches long slipped over tail stock muffler six-ounce Sullivan fuel bottle just fine fuel bottle used eight -in holes drilled out side fairly evenly spaced doubt po sitioning holes significance quite assembly float about two dozen rodeo parade three nlghts sent out show RC aircraft public Calebs Upstart II added display think quantity variety models displayed impressive con sidering size village short time members have hobby fact parade rodeo pretty impressive too talked some members PRCA Profes sional Rodeo Cowboys Association consensus Famous Preston Night Rodeo best country besides being oldest night rodeo America Based sample say RC flour ishing rural America spite difficul ties think back mid-Thirties believe kid rural MatTo Duke Foxs report justice should look up club point-of-contact wanted whet appetite about significant effort Continued page 141 December 1987 137 RC Aerobatics/Van Putte Continued page 137 success As says reward would appreciate would rush club members buy fly Fox motors Its obvious few serious competitors have already done just Almost everyone used Fox engines Control Line Combat years Nats Ron Van Putte 111 Sleepy Oaks Rd Ft Wal ton Beach FL 32548 RC Scale/Wischers Continued page 45 craftsmanship time highquality home-built airplane exception convention judges needed nitpickers find flaws especially planes com posite construction Ultrasmooth surfaces high-gloss finishes would show slightest blemish almost airplane Hinge gaps small 716-in visible close range almost-invisible line marked canopy outlines result painstaking effort fitting joints Performance matched appearance Bob Heren deen flew Glassair RG through blistering aerobatic routine speeds up 300 mph slender fiberglass fuselage withstood violent maneuvers Apprehensive spectators us wond ered about limits someone must know por tion field loaded intensely beautiful high-performance custom-built air craft main focus interest during four days Oshkosh centers around antique classic aircraft areas find examples type used young active full-scale flight hundreds classes approximately half near-mint condition some recently restored betterthan-new Recently adopted finishing techniques materials give lustrous gloss factory probably never achieved new ma terials have much longer livesThis place see photograph famous Wacos Stinsons Fairchilds Stearmans Beechcrafts Pipers Taylorcrafts well one-ofa-kind airplanes such Rawdon SE5 reproduction worth trip Oshkosh just see Jenny air sunlight penetrat ing through its fabric final flight Dean Crises t91 1 Curtiss pusher now bound museum recent past Nats EAA conven tion have held same week early Au gust two events different dates 1987 other Scale modelers could enjoy both Now hear events may overlap again 1988 probably means RC Scale Nats will flown dur ing portion Oshkosh week great est number aircraft presentthe first weekend midweek Nats participants could finally arrive Oshkosh desirable show planes will have already departed opinion effort should made separate two events permanently Scale enthusiasts can attend bothpreferably least week between Given choice Scale modelers would select Oshkosh Nats Scale attendance suffers met numerous AMA members Oshkosh year some come Nats R/C-56 glue other columns Wilhold R/C-56 glue has recommended cement ing metal wood canopy fuselage plastic painted surface other unusual combinations Its advantages flexibility after curing continues grip under conditions vibration dries clear also useful representing riv ets simulated metal airplane have found metal panels have adhered subsurface R/C-56 very difficult remove afterward de stroying either panel subsurface ever some modelers have informed us RIC-56 available searched substi tute found Weldhond glue has similar properties Recently visit local hobby shop purchased four-ounce bottle R/C-56 glue shelf No scarcity does have higher price tag now before $3 R/C-56 also continues advertised mail order catalogs Weldbond found hobby shops well hardware stores four-ounce larger sizes Balsa selection stack balsa sheets find weight difference about three-to-one heaviest sheet weighs about three times much lightest Because large variation has practice weigh sheet soon after purchase marking end ball-point pen small postal scale gradu ated -oz increments will job pre fer use Pelouze darkroom balance ordinarily used proportioning photographic chemicals Itis graduated grains avoirdupois 4375 grains per ounce accuracy Most balsa sheets standard 4 x 36 permits direct comparison between sheets also between various thicknesses example thickness varies 21 weight varies same wood equal density threeinch-wide sheets marked twice once true weight again weight would four-inch-wide sheet avoids guess work afterward bother weighing balsa Y16-in %2-in sheet particular sheets will tually become wing skins prevents sit uation finished wing badly out balance model has inclination turn direction know no warps cause turn its very likely result wing half being heavier Building wing near-equal weight half-panel becomes simple matter adding weights sheets side assure somewhere near equal Its true model has heavy wing wants turn direction can com pensate flight using aileron trim control leveling wings However compensation effective speed As speed reduced ailerons lose effect heavy wing drops less desirable using Down elevator trim correct sta bilizer incorrect incidence During loop example heavy wing offset ailerons will cause model corkscrew speed varies throughout maneuver Pattern fliers much aware problems Scale modelers because precision flight utmost importance will bury bits metal such nails solder wing tips Scale models wings may well suited such treatment Flying Scale model allerons offset also induces drag undesirable especially ship marginal power possibility tip stall also increased alleron de SEE YOUR DEALER FIRST U cant help you can order direct us sending Ihe full price plus $200 handling fee 10 116W 19th St PO Box U 511E6 HigginsviIIe MO 64037 call 816 584-7121 U U U U U U U U U uEUUUUUUUUUEUUUUEUU December 1987 141
Edition: Model Aviation - 1987/12
Page Numbers: 42, 43, 137, 141
Radio Control Sportand Aerobatics Ron Van Putte HOT EPOXY epoxy microwaving contro versy heats up pun intended couple times past columns mentioned softened Part Dave Browns epoxy microwave oven epoxy became stiff editorial staff Model Aviation took exception pro cedure claiming toxic fumes could pro duced ran David Falkenhagen Sig Manufacturing Company Nats talked quite about heating Part epoxy microwave oven soften After Nats got letter Dave somewhat edited let ter follows After conversation Nats thought prudent double check epoxy situation supplier raw resin informed few things addition what discussed thought might like know turns Out pure epoxy resin tendency has crystallize over course time Purity sense means resin hasnt diluted other chemicals reduce its viscosity extend goes further told common diluent ep ichlorohydrate rather nasty com pound would also chemical could released secondary heating resin good news epoxy proba bly Dave Browns well uses very high pur ity base resin heated will give off no toxic fumes According suppliers chemist talked epoxy resins contain some epichlorohydrate resin makeup epoxy contains less 5 ppm parts per 42 Model Aviation 6 OL $OWI 8-k #&ts engine sot nth Oubt millionR VP usually runs around 2 ppm onknow adequate temperature averageto restore crystallized epoxy resin Any also interesting supplier holdshigher will probably melt the finished base resins temperature l5OFpolyethylene bottle prior bottle-filling operation As basis conversation Bob Green Bayertown PA another flier thinks anhedraled stabs look good Hl Re venger sports OS 61 FSR-ABC B&D air-operted retracts weighs seven pounds unique engine mount Hobby Shacks Supra Fiy kit gives virtuaily unlimited capabil- Robert Apfei Nicevilie FL newcomer RC building talents good ity adjust side- downthrust ones Midwest Aero Star 40 first attempt RC model Looks really great chemist will continue advise custom ers heat Part resin should become crys tallized future use hot water putting microwave 20-30 seconds will pose no health risk product Other manufacturers products may contain extenders other diluents might cause problem heatedmaybebut really cant say anything about product other own got thinking after conversation probably would good idea openly ad vertise name base resin supplier Model Aviation dont mind telling anyone one-to-one basis compe tition would would appreciate discretion manner please men tion supplier name column have very good product dont want compromised Just wanted let know Dave Brown isnt makes good epoxy Good luck column getting printed side comments Duke Fox Fox Manufacturing Co has never avoid unpopular stand thought right Thats put edito rial comment some recent Fox magazine ads about bothering further research quieting engines because could detect wide spread support must have received bunch letters because has apparently changed mind has continued work quieting engines Dukes research resulted letter AMA members via AMA chartered club points-ofcontact Since Im secretary Eglin Aero Modelers AMA Charter No 221 got letters Im going quote letter Project Hush report included greatest threat continued enjoy ment hobby aggravation nonmod elers music sweetly running motor have determined possible quiet present motors sufficiently sound noticed people couple hun dred feet away reduce noise level requires two al terations 1 Replacing propeller quieter 2 Installing effective aftermuffler am happy report Joe Zingali Zinger Props Chris Macbin Rev-Up Props request working quiet props Also Du-Bro Sullivan Products request both working aftermuffler kits Until new-generation aftermufflers props appear market may want try modi fying models per diagram No 1 believe results will surprise article culmination several months experiments conducted object producing substantially quieter running twocycle engine now available results hoped 1 come up supereffective muffler could sell make pro fit 2 make easy customers have quiet-running Fox motor would banned sound-sensitive fields save sus pense no luck item 1but fan tastic success item 2 able get Deluxe 40 running quiet distance 100 ft four-decibel rise over background 64 decibels very little loss performance effective ingredients use two pro pellers stacked front other crankshaft adding aftermuffler made polyethylene fuel bottle Continued page 137 Zamuaiazaa New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows Walk yet Fully Aerobatic Complete Kit 8998 7550 San Gabriel Road cadero CA 93422 486-1717 56 Wing 40 Length 40 Engine 4 lbs 4 CH Fiber Glass Fuse & Belly Pan Foam Wing & Stab Balsa & Plywood dies RId Preducts 112 Basis St Lafayette LA 70508 3181 232-7446 Oealer rnqurrres tnvrted Lets enjoy outdoorsin comfort Little World Comfort Hot Burning Summer Days --- / Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq ff Aa Bg aa muse it cur aa large want becasa add-on tarts double triple et6tIre olze ot Porla-Slrades go ava2able Addon units can uaed taler awdnga pat 0 COVV5 etcl TRAK-LOK-EYE KITS make easy use ymr PortsStrarle mith RN isuipped wits ercunted emrqry kadr canopy a along waterproot heat retecting matedol white steer top aidel wits swique key hole corner Ettlegs no granmeb has no center pole mere anewitle space ateaddle pmiotableoramedelaiplane ttatandsaknost7 loll strorrg 1 olaninesir poles can stand work iday under contort wind reaialurt tested 40 MPH MOVING SALE 15% OFF regular prices listed below Oct ito Dec 1 4M Co products PLEASE NOTE OUR NEW ADDRESS AND PHONE NUMBER BELOW Write call tor additional information 4M Cts producta Free literature avaitebla eae 15% Off aporbanur ModS PPR4-6Osseas53396 5386 UPS ompany Dept MEcesenryMedsiEPFR4-ffO$3296$2500 *8300 UPS 209 SW lucy AvenueAdd-A-SlredeModeIAFRA-eO929565254593 00 LtPS 5 5A5*51SOUPS BartIesvIlle OK 74003RNTr86-EyeKft$10005 550S15012P5 PhoneMasterCudOdere-Chedss Dealer Inqahies hisSed *975AVAILABLE AT AMERICAS6525 FINEST HOBBY SHOPS DISTRIBUTED BY Tiger Tail 4 New Deluxe Kit 16495 Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Betty Pan Foam Wing & Hwd Ask about Kit & Eng Combos 72 Wing 800 sq ELEVENTH ANNUAL MODEL HOBBY TRADE SHOW INDUSTRY MEMBERS ONLY AY JAN 8 1988 10AM 5PM GENERAL PUBLIC RDAY JAN 9 1988 10AM 6PM GENERAL PUBLIC AY JAN 10 1988 10AM 5PM SEE THE LATEST PRODUCTS AND VISIT WITH MAJOR MANUFACTURERS AND DISTRIBUTORS OF MODEL AIRCRAFT MODEL ENGINES GIANT RAFFLE MODEL BOATS RADIO CONTROL SYSTEMS SHOP MODEL CARS MODELING ACCESSORIES * POND R TRACK ADMISSION Adults $500 under 13- $300 IE%T WE%T under 6- free adult STATIC DISPLAY COMPETITION IN MANY CATEGORIES U1~IIILg] aiLswiI sI1~2U 4 ILiI eIe]miw1kTl zii — s] LdIS]k~I-IU [v32]Ufiiiui I_____INTERNATIONAL MODELER SHOW OFFICE PO Box 10127 Costa Mesa CA 92627 Ph 714 548-4700 grey 6 x 3 propeller using K&B Supersonic 1000 fuelall after having run six tanks fuel through engine black stuff stopped com ing out engine during third tank fuel monitored rpm performance Accutach II handiest tools kit problems faced heat 95 0F high humidity 80% high altitude 4500 ft above sea level excessive internal friction engine density altitude about 9000 ft factors conspired reduce weight oxygen inhaled cycle en gine internal combustion engines limited power can produced burning oxygen take can increase power reducing inter nal friction getting oxygen turbochargers increase power stuffing air engine Another facet problem above factors also reduce local air pressure airplane has fly faster lift its weight Sudden thought Electric pro pulsion systems dont lose power increased altitude rate see side-bar en gine fixes solved too-little-power prob lem After doing engine rework next test gave results Same head prop fuel no spring starter 16000 rpm Cox No 325 low-compression head supplied engine using gasket washer high-compression head added another 450 rpm plane now flew quite well able loop roll stall turn etc positive-G maneu vers fuel tanks fuel pickup arrangement prevents inverted flying negative-G maneu vers After flight engine wouldnt run Some bits grass gotten themselves engine holding reed valve open glued piece sponge firewall covering air inlet keep sueh junk Out engine should mention new Cox snap starter catalog No 333 works better its pre decessors cuts performance about 350 rpm used Calebs airplane because makes starting very simple tituck NY built model airplanes see nothing has changed except model air planes now RC instead rubber-powered Free Flight models George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aerobatics/Van Putte Continued page 43 Looking some flying buddies turned ________________________________________ Mark Gilbert Fairview ID neighbor Mark Stacking two propellers manner litis guiding member Franklin County tie strange appearance flies airRadio Controllers has built up small hobby shop service members fathers plane okay really does make substantial business Gilberts White Farm Equipment Sales difference sound unmuffled slightly & Service State Street Fairview ID Mark muffled engine propeller noise noticewas making up flatbed trailer fitted Out look le until muffler becomes reasonably effec like runway dressed RC air- eller becomes predominant planes local RC fliers could assemble und necessary quiet both propeller exhaust No metal muffler itself have tested comes anywhere near amount sound reduc tion little power loss standard muf fler six-ounce Sullivan polyethylene bottle coupled tail Again little strange appearance really does work some tuned-pipe silicone tubing 7A6-in ID %-in wall three inches long slipped over tail stock muffler six-ounce Sullivan fuel bottle just fine fuel bottle used eight -in holes drilled out side fairly evenly spaced doubt po sitioning holes significance quite assembly float about two dozen rodeo parade three nlghts sent out show RC aircraft public Calebs Upstart II added display think quantity variety models displayed impressive con sidering size village short time members have hobby fact parade rodeo pretty impressive too talked some members PRCA Profes sional Rodeo Cowboys Association consensus Famous Preston Night Rodeo best country besides being oldest night rodeo America Based sample say RC flour ishing rural America spite difficul ties think back mid-Thirties believe kid rural MatTo Duke Foxs report justice should look up club point-of-contact wanted whet appetite about significant effort Continued page 141 December 1987 137 RC Aerobatics/Van Putte Continued page 137 success As says reward would appreciate would rush club members buy fly Fox motors Its obvious few serious competitors have already done just Almost everyone used Fox engines Control Line Combat years Nats Ron Van Putte 111 Sleepy Oaks Rd Ft Wal ton Beach FL 32548 RC Scale/Wischers Continued page 45 craftsmanship time highquality home-built airplane exception convention judges needed nitpickers find flaws especially planes com posite construction Ultrasmooth surfaces high-gloss finishes would show slightest blemish almost airplane Hinge gaps small 716-in visible close range almost-invisible line marked canopy outlines result painstaking effort fitting joints Performance matched appearance Bob Heren deen flew Glassair RG through blistering aerobatic routine speeds up 300 mph slender fiberglass fuselage withstood violent maneuvers Apprehensive spectators us wond ered about limits someone must know por tion field loaded intensely beautiful high-performance custom-built air craft main focus interest during four days Oshkosh centers around antique classic aircraft areas find examples type used young active full-scale flight hundreds classes approximately half near-mint condition some recently restored betterthan-new Recently adopted finishing techniques materials give lustrous gloss factory probably never achieved new ma terials have much longer livesThis place see photograph famous Wacos Stinsons Fairchilds Stearmans Beechcrafts Pipers Taylorcrafts well one-ofa-kind airplanes such Rawdon SE5 reproduction worth trip Oshkosh just see Jenny air sunlight penetrat ing through its fabric final flight Dean Crises t91 1 Curtiss pusher now bound museum recent past Nats EAA conven tion have held same week early Au gust two events different dates 1987 other Scale modelers could enjoy both Now hear events may overlap again 1988 probably means RC Scale Nats will flown dur ing portion Oshkosh week great est number aircraft presentthe first weekend midweek Nats participants could finally arrive Oshkosh desirable show planes will have already departed opinion effort should made separate two events permanently Scale enthusiasts can attend bothpreferably least week between Given choice Scale modelers would select Oshkosh Nats Scale attendance suffers met numerous AMA members Oshkosh year some come Nats R/C-56 glue other columns Wilhold R/C-56 glue has recommended cement ing metal wood canopy fuselage plastic painted surface other unusual combinations Its advantages flexibility after curing continues grip under conditions vibration dries clear also useful representing riv ets simulated metal airplane have found metal panels have adhered subsurface R/C-56 very difficult remove afterward de stroying either panel subsurface ever some modelers have informed us RIC-56 available searched substi tute found Weldhond glue has similar properties Recently visit local hobby shop purchased four-ounce bottle R/C-56 glue shelf No scarcity does have higher price tag now before $3 R/C-56 also continues advertised mail order catalogs Weldbond found hobby shops well hardware stores four-ounce larger sizes Balsa selection stack balsa sheets find weight difference about three-to-one heaviest sheet weighs about three times much lightest Because large variation has practice weigh sheet soon after purchase marking end ball-point pen small postal scale gradu ated -oz increments will job pre fer use Pelouze darkroom balance ordinarily used proportioning photographic chemicals Itis graduated grains avoirdupois 4375 grains per ounce accuracy Most balsa sheets standard 4 x 36 permits direct comparison between sheets also between various thicknesses example thickness varies 21 weight varies same wood equal density threeinch-wide sheets marked twice once true weight again weight would four-inch-wide sheet avoids guess work afterward bother weighing balsa Y16-in %2-in sheet particular sheets will tually become wing skins prevents sit uation finished wing badly out balance model has inclination turn direction know no warps cause turn its very likely result wing half being heavier Building wing near-equal weight half-panel becomes simple matter adding weights sheets side assure somewhere near equal Its true model has heavy wing wants turn direction can com pensate flight using aileron trim control leveling wings However compensation effective speed As speed reduced ailerons lose effect heavy wing drops less desirable using Down elevator trim correct sta bilizer incorrect incidence During loop example heavy wing offset ailerons will cause model corkscrew speed varies throughout maneuver Pattern fliers much aware problems Scale modelers because precision flight utmost importance will bury bits metal such nails solder wing tips Scale models wings may well suited such treatment Flying Scale model allerons offset also induces drag undesirable especially ship marginal power possibility tip stall also increased alleron de SEE YOUR DEALER FIRST U cant help you can order direct us sending Ihe full price plus $200 handling fee 10 116W 19th St PO Box U 511E6 HigginsviIIe MO 64037 call 816 584-7121 U U U U U U U U U uEUUUUUUUUUEUUUUEUU December 1987 141
Edition: Model Aviation - 1987/12
Page Numbers: 42, 43, 137, 141
Radio Control Sportand Aerobatics Ron Van Putte HOT EPOXY epoxy microwaving contro versy heats up pun intended couple times past columns mentioned softened Part Dave Browns epoxy microwave oven epoxy became stiff editorial staff Model Aviation took exception pro cedure claiming toxic fumes could pro duced ran David Falkenhagen Sig Manufacturing Company Nats talked quite about heating Part epoxy microwave oven soften After Nats got letter Dave somewhat edited let ter follows After conversation Nats thought prudent double check epoxy situation supplier raw resin informed few things addition what discussed thought might like know turns Out pure epoxy resin tendency has crystallize over course time Purity sense means resin hasnt diluted other chemicals reduce its viscosity extend goes further told common diluent ep ichlorohydrate rather nasty com pound would also chemical could released secondary heating resin good news epoxy proba bly Dave Browns well uses very high pur ity base resin heated will give off no toxic fumes According suppliers chemist talked epoxy resins contain some epichlorohydrate resin makeup epoxy contains less 5 ppm parts per 42 Model Aviation 6 OL $OWI 8-k #&ts engine sot nth Oubt millionR VP usually runs around 2 ppm onknow adequate temperature averageto restore crystallized epoxy resin Any also interesting supplier holdshigher will probably melt the finished base resins temperature l5OFpolyethylene bottle prior bottle-filling operation As basis conversation Bob Green Bayertown PA another flier thinks anhedraled stabs look good Hl Re venger sports OS 61 FSR-ABC B&D air-operted retracts weighs seven pounds unique engine mount Hobby Shacks Supra Fiy kit gives virtuaily unlimited capabil- Robert Apfei Nicevilie FL newcomer RC building talents good ity adjust side- downthrust ones Midwest Aero Star 40 first attempt RC model Looks really great chemist will continue advise custom ers heat Part resin should become crys tallized future use hot water putting microwave 20-30 seconds will pose no health risk product Other manufacturers products may contain extenders other diluents might cause problem heatedmaybebut really cant say anything about product other own got thinking after conversation probably would good idea openly ad vertise name base resin supplier Model Aviation dont mind telling anyone one-to-one basis compe tition would would appreciate discretion manner please men tion supplier name column have very good product dont want compromised Just wanted let know Dave Brown isnt makes good epoxy Good luck column getting printed side comments Duke Fox Fox Manufacturing Co has never avoid unpopular stand thought right Thats put edito rial comment some recent Fox magazine ads about bothering further research quieting engines because could detect wide spread support must have received bunch letters because has apparently changed mind has continued work quieting engines Dukes research resulted letter AMA members via AMA chartered club points-ofcontact Since Im secretary Eglin Aero Modelers AMA Charter No 221 got letters Im going quote letter Project Hush report included greatest threat continued enjoy ment hobby aggravation nonmod elers music sweetly running motor have determined possible quiet present motors sufficiently sound noticed people couple hun dred feet away reduce noise level requires two al terations 1 Replacing propeller quieter 2 Installing effective aftermuffler am happy report Joe Zingali Zinger Props Chris Macbin Rev-Up Props request working quiet props Also Du-Bro Sullivan Products request both working aftermuffler kits Until new-generation aftermufflers props appear market may want try modi fying models per diagram No 1 believe results will surprise article culmination several months experiments conducted object producing substantially quieter running twocycle engine now available results hoped 1 come up supereffective muffler could sell make pro fit 2 make easy customers have quiet-running Fox motor would banned sound-sensitive fields save sus pense no luck item 1but fan tastic success item 2 able get Deluxe 40 running quiet distance 100 ft four-decibel rise over background 64 decibels very little loss performance effective ingredients use two pro pellers stacked front other crankshaft adding aftermuffler made polyethylene fuel bottle Continued page 137 Zamuaiazaa New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows Walk yet Fully Aerobatic Complete Kit 8998 7550 San Gabriel Road cadero CA 93422 486-1717 56 Wing 40 Length 40 Engine 4 lbs 4 CH Fiber Glass Fuse & Belly Pan Foam Wing & Stab Balsa & Plywood dies RId Preducts 112 Basis St Lafayette LA 70508 3181 232-7446 Oealer rnqurrres tnvrted Lets enjoy outdoorsin comfort Little World Comfort Hot Burning Summer Days --- / Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq ff Aa Bg aa muse it cur aa large want becasa add-on tarts double triple et6tIre olze ot Porla-Slrades go ava2able Addon units can uaed taler awdnga pat 0 COVV5 etcl TRAK-LOK-EYE KITS make easy use ymr PortsStrarle mith RN isuipped wits ercunted emrqry kadr canopy a along waterproot heat retecting matedol white steer top aidel wits swique key hole corner Ettlegs no granmeb has no center pole mere anewitle space ateaddle pmiotableoramedelaiplane ttatandsaknost7 loll strorrg 1 olaninesir poles can stand work iday under contort wind reaialurt tested 40 MPH MOVING SALE 15% OFF regular prices listed below Oct ito Dec 1 4M Co products PLEASE NOTE OUR NEW ADDRESS AND PHONE NUMBER BELOW Write call tor additional information 4M Cts producta Free literature avaitebla eae 15% Off aporbanur ModS PPR4-6Osseas53396 5386 UPS ompany Dept MEcesenryMedsiEPFR4-ffO$3296$2500 *8300 UPS 209 SW lucy AvenueAdd-A-SlredeModeIAFRA-eO929565254593 00 LtPS 5 5A5*51SOUPS BartIesvIlle OK 74003RNTr86-EyeKft$10005 550S15012P5 PhoneMasterCudOdere-Chedss Dealer Inqahies hisSed *975AVAILABLE AT AMERICAS6525 FINEST HOBBY SHOPS DISTRIBUTED BY Tiger Tail 4 New Deluxe Kit 16495 Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Betty Pan Foam Wing & Hwd Ask about Kit & Eng Combos 72 Wing 800 sq ELEVENTH ANNUAL MODEL HOBBY TRADE SHOW INDUSTRY MEMBERS ONLY AY JAN 8 1988 10AM 5PM GENERAL PUBLIC RDAY JAN 9 1988 10AM 6PM GENERAL PUBLIC AY JAN 10 1988 10AM 5PM SEE THE LATEST PRODUCTS AND VISIT WITH MAJOR MANUFACTURERS AND DISTRIBUTORS OF MODEL AIRCRAFT MODEL ENGINES GIANT RAFFLE MODEL BOATS RADIO CONTROL SYSTEMS SHOP MODEL CARS MODELING ACCESSORIES * POND R TRACK ADMISSION Adults $500 under 13- $300 IE%T WE%T under 6- free adult STATIC DISPLAY COMPETITION IN MANY CATEGORIES U1~IIILg] aiLswiI sI1~2U 4 ILiI eIe]miw1kTl zii — s] LdIS]k~I-IU [v32]Ufiiiui I_____INTERNATIONAL MODELER SHOW OFFICE PO Box 10127 Costa Mesa CA 92627 Ph 714 548-4700 grey 6 x 3 propeller using K&B Supersonic 1000 fuelall after having run six tanks fuel through engine black stuff stopped com ing out engine during third tank fuel monitored rpm performance Accutach II handiest tools kit problems faced heat 95 0F high humidity 80% high altitude 4500 ft above sea level excessive internal friction engine density altitude about 9000 ft factors conspired reduce weight oxygen inhaled cycle en gine internal combustion engines limited power can produced burning oxygen take can increase power reducing inter nal friction getting oxygen turbochargers increase power stuffing air engine Another facet problem above factors also reduce local air pressure airplane has fly faster lift its weight Sudden thought Electric pro pulsion systems dont lose power increased altitude rate see side-bar en gine fixes solved too-little-power prob lem After doing engine rework next test gave results Same head prop fuel no spring starter 16000 rpm Cox No 325 low-compression head supplied engine using gasket washer high-compression head added another 450 rpm plane now flew quite well able loop roll stall turn etc positive-G maneu vers fuel tanks fuel pickup arrangement prevents inverted flying negative-G maneu vers After flight engine wouldnt run Some bits grass gotten themselves engine holding reed valve open glued piece sponge firewall covering air inlet keep sueh junk Out engine should mention new Cox snap starter catalog No 333 works better its pre decessors cuts performance about 350 rpm used Calebs airplane because makes starting very simple tituck NY built model airplanes see nothing has changed except model air planes now RC instead rubber-powered Free Flight models George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aerobatics/Van Putte Continued page 43 Looking some flying buddies turned ________________________________________ Mark Gilbert Fairview ID neighbor Mark Stacking two propellers manner litis guiding member Franklin County tie strange appearance flies airRadio Controllers has built up small hobby shop service members fathers plane okay really does make substantial business Gilberts White Farm Equipment Sales difference sound unmuffled slightly & Service State Street Fairview ID Mark muffled engine propeller noise noticewas making up flatbed trailer fitted Out look le until muffler becomes reasonably effec like runway dressed RC air- eller becomes predominant planes local RC fliers could assemble und necessary quiet both propeller exhaust No metal muffler itself have tested comes anywhere near amount sound reduc tion little power loss standard muf fler six-ounce Sullivan polyethylene bottle coupled tail Again little strange appearance really does work some tuned-pipe silicone tubing 7A6-in ID %-in wall three inches long slipped over tail stock muffler six-ounce Sullivan fuel bottle just fine fuel bottle used eight -in holes drilled out side fairly evenly spaced doubt po sitioning holes significance quite assembly float about two dozen rodeo parade three nlghts sent out show RC aircraft public Calebs Upstart II added display think quantity variety models displayed impressive con sidering size village short time members have hobby fact parade rodeo pretty impressive too talked some members PRCA Profes sional Rodeo Cowboys Association consensus Famous Preston Night Rodeo best country besides being oldest night rodeo America Based sample say RC flour ishing rural America spite difficul ties think back mid-Thirties believe kid rural MatTo Duke Foxs report justice should look up club point-of-contact wanted whet appetite about significant effort Continued page 141 December 1987 137 RC Aerobatics/Van Putte Continued page 137 success As says reward would appreciate would rush club members buy fly Fox motors Its obvious few serious competitors have already done just Almost everyone used Fox engines Control Line Combat years Nats Ron Van Putte 111 Sleepy Oaks Rd Ft Wal ton Beach FL 32548 RC Scale/Wischers Continued page 45 craftsmanship time highquality home-built airplane exception convention judges needed nitpickers find flaws especially planes com posite construction Ultrasmooth surfaces high-gloss finishes would show slightest blemish almost airplane Hinge gaps small 716-in visible close range almost-invisible line marked canopy outlines result painstaking effort fitting joints Performance matched appearance Bob Heren deen flew Glassair RG through blistering aerobatic routine speeds up 300 mph slender fiberglass fuselage withstood violent maneuvers Apprehensive spectators us wond ered about limits someone must know por tion field loaded intensely beautiful high-performance custom-built air craft main focus interest during four days Oshkosh centers around antique classic aircraft areas find examples type used young active full-scale flight hundreds classes approximately half near-mint condition some recently restored betterthan-new Recently adopted finishing techniques materials give lustrous gloss factory probably never achieved new ma terials have much longer livesThis place see photograph famous Wacos Stinsons Fairchilds Stearmans Beechcrafts Pipers Taylorcrafts well one-ofa-kind airplanes such Rawdon SE5 reproduction worth trip Oshkosh just see Jenny air sunlight penetrat ing through its fabric final flight Dean Crises t91 1 Curtiss pusher now bound museum recent past Nats EAA conven tion have held same week early Au gust two events different dates 1987 other Scale modelers could enjoy both Now hear events may overlap again 1988 probably means RC Scale Nats will flown dur ing portion Oshkosh week great est number aircraft presentthe first weekend midweek Nats participants could finally arrive Oshkosh desirable show planes will have already departed opinion effort should made separate two events permanently Scale enthusiasts can attend bothpreferably least week between Given choice Scale modelers would select Oshkosh Nats Scale attendance suffers met numerous AMA members Oshkosh year some come Nats R/C-56 glue other columns Wilhold R/C-56 glue has recommended cement ing metal wood canopy fuselage plastic painted surface other unusual combinations Its advantages flexibility after curing continues grip under conditions vibration dries clear also useful representing riv ets simulated metal airplane have found metal panels have adhered subsurface R/C-56 very difficult remove afterward de stroying either panel subsurface ever some modelers have informed us RIC-56 available searched substi tute found Weldhond glue has similar properties Recently visit local hobby shop purchased four-ounce bottle R/C-56 glue shelf No scarcity does have higher price tag now before $3 R/C-56 also continues advertised mail order catalogs Weldbond found hobby shops well hardware stores four-ounce larger sizes Balsa selection stack balsa sheets find weight difference about three-to-one heaviest sheet weighs about three times much lightest Because large variation has practice weigh sheet soon after purchase marking end ball-point pen small postal scale gradu ated -oz increments will job pre fer use Pelouze darkroom balance ordinarily used proportioning photographic chemicals Itis graduated grains avoirdupois 4375 grains per ounce accuracy Most balsa sheets standard 4 x 36 permits direct comparison between sheets also between various thicknesses example thickness varies 21 weight varies same wood equal density threeinch-wide sheets marked twice once true weight again weight would four-inch-wide sheet avoids guess work afterward bother weighing balsa Y16-in %2-in sheet particular sheets will tually become wing skins prevents sit uation finished wing badly out balance model has inclination turn direction know no warps cause turn its very likely result wing half being heavier Building wing near-equal weight half-panel becomes simple matter adding weights sheets side assure somewhere near equal Its true model has heavy wing wants turn direction can com pensate flight using aileron trim control leveling wings However compensation effective speed As speed reduced ailerons lose effect heavy wing drops less desirable using Down elevator trim correct sta bilizer incorrect incidence During loop example heavy wing offset ailerons will cause model corkscrew speed varies throughout maneuver Pattern fliers much aware problems Scale modelers because precision flight utmost importance will bury bits metal such nails solder wing tips Scale models wings may well suited such treatment Flying Scale model allerons offset also induces drag undesirable especially ship marginal power possibility tip stall also increased alleron de SEE YOUR DEALER FIRST U cant help you can order direct us sending Ihe full price plus $200 handling fee 10 116W 19th St PO Box U 511E6 HigginsviIIe MO 64037 call 816 584-7121 U U U U U U U U U uEUUUUUUUUUEUUUUEUU December 1987 141