QAUUFE~T ~1FLI1 OMES FIRST Working foam plastic can have un expected effects body 0 John Preston WOULD YOU BELIEVE Styrofoam may hazardous health Before describe perhaps should define what mean Styro foam registered trademark Dow Chemical Company best knowledge foam material used manufacture coffee cups ready-to-fly model aircraft material talking about usually sold large sheets varying thickness very often used home insulation may also purchased modelers make foam wing cores sold sheet form usually has paper covering side Styrofoam name together name manufacturer printed letter Ben Brackett Cincinnati OH describes what can happen unwary helping schoolteacher friend work up some boat hulls Styrofoam class project came down pre-flu symptomsdrunk skunk tired achey everything ele vated temperature Well make long story short after staying out workshop two days felt okay 15 minutes hot-wire cutting almost put ear school teacher friend wrote Dow kind enough send enclosed booklet Although Bens case hazard resulted cutting Styrofoam using hot wire same problem can occur during sawing shaping grinding operation explanation Bens misfortune contained Dow booklet extracts follow Styrofoam brand plastic foam made pushing chemical gas melted plastic making foam cools forms solid lightweight Styrofoam brand plastic foam know plastic harmless polystyrene gas methyl chloridea chemical gas can represent potential hazard breathe too much Most methyl chloride gas escapes Styrofoam brand plastic foam before work some stays locked cut saw Styrofoam brand plastic foam foam walls broken letting out gas can cause problem too much gas released stays work area Some first signs overexposure methyl chloride gas dizziness staggering blurred vision Sometimes signs may show up day two later recovery may take several days depending amount exposure Since first results overexposure similar being drunk person suffering such effects will have hard time working safely Such person wont able control actions risks injury himself others avoid overexposure methyl chloride gas properly operate maintain equipment exhaust fans Practice good housekeeping keep finished pieces waste storage minimum Have plenty fresh air around operation dont work Styrofoam brand plastic foam small poorly-ventilated area room short human body designed breathe fresh air asked operate environment polluted other gases may function too well orif concentration pollutants high enoughit may completely cease function workshops need ventila tion Does yours have exhaust fan Recent conversations couple modeler friends together letter Australia indicate its time return old topic propellers First letter David Hipperson Victoria Park W Australia wrote tell us blade-shedding incident wooden propeller Daves wife bought him first big motor 22cc Tartan Equipped 18 x 6 prop checked balance pick up Daves story after engine run once robust test stand allowed cool gloated told wife done good thing Came back checked bolts prop nut filled tank started motor Moved rear did sharp pop something light-coloured shot through air followed two three seconds vibration before could shut down motor sharp crack propeller prop nut washer prop driver flew through air Believe vibration smoothed com pletely would say motor would have run perfectly well shaft ttle wasnt chancing that motor shut down pronto inspection found blade tip sheared off some pretty dappled effects could seenI would guess sort quarter-grain effect No damage motor cup tea restored tattered nerves have used companys props before greatbut blame myself realizing failure could occur area like curestraight grain propellers now onand great care making sure Im well out harms way first incident weve heard involved spontaneous shedding blade wooden prop However problem commonly associated plastic props What surprising case happened engine would guess couldnt have turning 3000 4000rpm maybe less since full bore Tartan 18 x 6 prop will turn about 7000 rpm could argue since Tartan converted industrial engine probably vibrates lot just friend Bill Winter has Tartan -scale Aristocrat find smoothest industrial engine conversions think Dave correct diagnosis grain wood culprit Since 18 x 6 doesnt come cheap suggest modelers take little extra time examine before purchase good example product better purchased local hobby store can see what Continued page 14 10 Model Aviation Ij YOU THE &UV WITW THE MODEL AIRPLANE FOR SALE r SNAP-ON BALL LINKS 2-56 THREADED COUPLER INCL BOLT-ON LINK 3-piece ball link set No 180 must helicopters readily adaptable rudder elevator servo linkage R/C planes boats cars Ball joint action eliminates binding neat clean appearance OnlV 85C fl 0 THREADED FOR 4-40 ROD OR BOLT N TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT I, L2 V THREADED LINK 5-Piece ball link set No 181 excelient off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon ball link Easily adjustable Only 85C AIRCRAFT QUALITY HIGH STRENGTH STEEL 0 1/8 TRIM ADJUSTMENT 4-Piece ball link set No 182 prefer permanent installation Includes nylon link threaded coupler steel ball pin washer peening Absolutely no linkage play ball links used Nylon link helps reduce viabration looks good tool Only 85C AILERON HORN WIRE Excellent hook up assemblyforstripailerons Eliminates differential throw No 189 .2Sets $ 1/16 THREADED BALL LINK No190 BALL LINK SOCKETS Extra nylon sockets styles Du-bro ball links No188 .4 $100 PR00mm DU-BRO PRODUCTS U INCORPORATED Banner Road Wauconda Illinois 60084 USA getting rather discount mail order house Daves incident thanks prudence moving location behind engine after starting did result injury local modeler friend fortunate inadvertently grabbed handful blades prop being turned 90 engine friend shall nameless since starting motor unaided common practice engine size goes past 60 think time have helper friends case engine started low throttle radio transmitter lying ground within easy reach Nobody sure exactly what happened either rag blown wind across transmitter throttle stick friend accidently dragged across stick Anyway engine went full bore prevent being struck prop some groin area friend put up right hand arrested plane prop motor three fingers result trip hospital loss use right hand several weeks maybe permanent loss use fingers Miraculously no fingers lost nor bones broken told friend just loss use ones dominant hand few weeks sufficient cause very careful future last propeller incident happened own clubs field came us second-hand via another club member Quadra-powered model being started hand propping showing no sign firing let alone starting Its owner apparently becoming complacent flipping prop great rapidity engine caught warning immedi ately stopped hand came back another flip resultlacerated fingers required medical attention Several years ago government agency work received petition issue federal regulation would require model airplane engines sold self-contained remotely-operated self-starter time onboard self-starter yet reach market place Needless say petition rejected Since isnt economically practical have self-starters model engines have accept some us will end up feeding fingers through prop use hand-starting techniques happens once full-scale pilotswith obviously dire consequences column can hope periodically remind careful starting adjusting engines can afford use electric starter As alternative use glove chicken stick RC modeler always start engine low throttle move behind prop arc before advancing full throttle adjust mixture fly models equipped engines throttles can urge exercise extra degree caution Try minimize time must spend prop arc final word clarify role contributing editor Model nation magazine None us employed full-time magazine nor us see what will appear magazine other own columns until reaches mail boxes same time reaches yours safety column writer responsible ensuring magazine depicts safe activi ties Thats editors job RMcM letter received month chastised us allowing cartoon appeared page 126 November issue depicted RC Helicopter being flown around head lady Continued page 104 14 Model Aviation NO PLAY SUPER PRECISION THROTTLE MAKES HOOK-UPS TAKES CARE OF ANY MISALIGNMENT new 4 piece threaded ball link set fits perfectly servo arm holes beicranks nylon horns throt tle arms Strong easy hook up Just bolt 85 U3GAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience CONTROl modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control IVIS41 1-i Futaba____ sales ser IS.ipment imported byo Line 2RAFTF2~-e JR-PROPO rado cus Hobbies 1925 E Creighton Road Pensacola FL 32504 904/478-6745 Safety Preston Continued page 14 seated lawn chair promptly swatted out sky fly swatter Quite frankly dont see anything objectionable cartoon safety point view photograph rather cartoon might think differently However correspondent believes too yoyo types out would fly close people especially because saw magazine So addition wishing safe month yoyo types out keep thy RC choppers away folks lest thou get chopped fly swatter John Prestoz 7012 Eliira Couri Falls Church VA 22042 Chicago Expo/Wtschers Cohtinued page 18 Scale model exhibitions Chicago Expo no exception Pattern Spcrt models minority Giant Scale over whelming quantity past Fifty trophies awarded 20 categories individual awards best finishes First place Military Sport Scale class won superb Bell RP-63G target plane Weldon Smith Since last seen Kinecobra has its engine changed Rossi 90 special head fins adequate cooling engine buried deep fuselage rear prototype long extension shaft reaching through beneath cockpit belt reduction bi ESO SPOI S CALIFC SPORT R/C FOR BARNSTORMERS AND STUDENTS nose See August 1981 issue MA detailed description model prove kit airplanes can win Robert Walkers first place Non-Military Sport Scale entry Beechcraft Bonanza E modified Byron kit Paul Clements winner best Pattern plane award also best finish trophy Skynight 6 plane lays rest myth well-finished models never fly Pauls ship has hundreds competition flights Richard Quinlan acquired couple first place trophies Helicopter class Kavan OH-S 8A other Giant class Piper 1-3 Cub An unusual winner Sport Scale Sailplane class Messerschmitt ME-163 Komet rocket plane Mark Weber Scott Christensens Sagitta 900 winner General Sailplane class Contributing success Chicago Expo local hobby industry prominence among commercial exhibitors including well-known namesof Midwest Du-Bro Bridi Robart Gold berg Top Flite augmented nearby Sig Mfg Bud Nosen Byron Originals Kitty Hawk Flite Glas Other exhibitors come great distances Lifting show out strictly local class displays Kraft Royal Elec tronics Ace KC Eastcraft Specialty Products Circus Hobbies MRC AMA six organizations displays writing advertisers mention read about Model Aviation 104 Model Aviation James Oram L Ralph Warner Ram Radio Controlled Products booth market fail-safe devices lighting systems pilotfigures SCALE R/C JEMCO SPORT SCALE BALSA COVEREO FOAM WING CORES
Edition: Model Aviation - 1982/02
Page Numbers: 10, 14, 104
QAUUFE~T ~1FLI1 OMES FIRST Working foam plastic can have un expected effects body 0 John Preston WOULD YOU BELIEVE Styrofoam may hazardous health Before describe perhaps should define what mean Styro foam registered trademark Dow Chemical Company best knowledge foam material used manufacture coffee cups ready-to-fly model aircraft material talking about usually sold large sheets varying thickness very often used home insulation may also purchased modelers make foam wing cores sold sheet form usually has paper covering side Styrofoam name together name manufacturer printed letter Ben Brackett Cincinnati OH describes what can happen unwary helping schoolteacher friend work up some boat hulls Styrofoam class project came down pre-flu symptomsdrunk skunk tired achey everything ele vated temperature Well make long story short after staying out workshop two days felt okay 15 minutes hot-wire cutting almost put ear school teacher friend wrote Dow kind enough send enclosed booklet Although Bens case hazard resulted cutting Styrofoam using hot wire same problem can occur during sawing shaping grinding operation explanation Bens misfortune contained Dow booklet extracts follow Styrofoam brand plastic foam made pushing chemical gas melted plastic making foam cools forms solid lightweight Styrofoam brand plastic foam know plastic harmless polystyrene gas methyl chloridea chemical gas can represent potential hazard breathe too much Most methyl chloride gas escapes Styrofoam brand plastic foam before work some stays locked cut saw Styrofoam brand plastic foam foam walls broken letting out gas can cause problem too much gas released stays work area Some first signs overexposure methyl chloride gas dizziness staggering blurred vision Sometimes signs may show up day two later recovery may take several days depending amount exposure Since first results overexposure similar being drunk person suffering such effects will have hard time working safely Such person wont able control actions risks injury himself others avoid overexposure methyl chloride gas properly operate maintain equipment exhaust fans Practice good housekeeping keep finished pieces waste storage minimum Have plenty fresh air around operation dont work Styrofoam brand plastic foam small poorly-ventilated area room short human body designed breathe fresh air asked operate environment polluted other gases may function too well orif concentration pollutants high enoughit may completely cease function workshops need ventila tion Does yours have exhaust fan Recent conversations couple modeler friends together letter Australia indicate its time return old topic propellers First letter David Hipperson Victoria Park W Australia wrote tell us blade-shedding incident wooden propeller Daves wife bought him first big motor 22cc Tartan Equipped 18 x 6 prop checked balance pick up Daves story after engine run once robust test stand allowed cool gloated told wife done good thing Came back checked bolts prop nut filled tank started motor Moved rear did sharp pop something light-coloured shot through air followed two three seconds vibration before could shut down motor sharp crack propeller prop nut washer prop driver flew through air Believe vibration smoothed com pletely would say motor would have run perfectly well shaft ttle wasnt chancing that motor shut down pronto inspection found blade tip sheared off some pretty dappled effects could seenI would guess sort quarter-grain effect No damage motor cup tea restored tattered nerves have used companys props before greatbut blame myself realizing failure could occur area like curestraight grain propellers now onand great care making sure Im well out harms way first incident weve heard involved spontaneous shedding blade wooden prop However problem commonly associated plastic props What surprising case happened engine would guess couldnt have turning 3000 4000rpm maybe less since full bore Tartan 18 x 6 prop will turn about 7000 rpm could argue since Tartan converted industrial engine probably vibrates lot just friend Bill Winter has Tartan -scale Aristocrat find smoothest industrial engine conversions think Dave correct diagnosis grain wood culprit Since 18 x 6 doesnt come cheap suggest modelers take little extra time examine before purchase good example product better purchased local hobby store can see what Continued page 14 10 Model Aviation Ij YOU THE &UV WITW THE MODEL AIRPLANE FOR SALE r SNAP-ON BALL LINKS 2-56 THREADED COUPLER INCL BOLT-ON LINK 3-piece ball link set No 180 must helicopters readily adaptable rudder elevator servo linkage R/C planes boats cars Ball joint action eliminates binding neat clean appearance OnlV 85C fl 0 THREADED FOR 4-40 ROD OR BOLT N TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT I, L2 V THREADED LINK 5-Piece ball link set No 181 excelient off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon ball link Easily adjustable Only 85C AIRCRAFT QUALITY HIGH STRENGTH STEEL 0 1/8 TRIM ADJUSTMENT 4-Piece ball link set No 182 prefer permanent installation Includes nylon link threaded coupler steel ball pin washer peening Absolutely no linkage play ball links used Nylon link helps reduce viabration looks good tool Only 85C AILERON HORN WIRE Excellent hook up assemblyforstripailerons Eliminates differential throw No 189 .2Sets $ 1/16 THREADED BALL LINK No190 BALL LINK SOCKETS Extra nylon sockets styles Du-bro ball links No188 .4 $100 PR00mm DU-BRO PRODUCTS U INCORPORATED Banner Road Wauconda Illinois 60084 USA getting rather discount mail order house Daves incident thanks prudence moving location behind engine after starting did result injury local modeler friend fortunate inadvertently grabbed handful blades prop being turned 90 engine friend shall nameless since starting motor unaided common practice engine size goes past 60 think time have helper friends case engine started low throttle radio transmitter lying ground within easy reach Nobody sure exactly what happened either rag blown wind across transmitter throttle stick friend accidently dragged across stick Anyway engine went full bore prevent being struck prop some groin area friend put up right hand arrested plane prop motor three fingers result trip hospital loss use right hand several weeks maybe permanent loss use fingers Miraculously no fingers lost nor bones broken told friend just loss use ones dominant hand few weeks sufficient cause very careful future last propeller incident happened own clubs field came us second-hand via another club member Quadra-powered model being started hand propping showing no sign firing let alone starting Its owner apparently becoming complacent flipping prop great rapidity engine caught warning immedi ately stopped hand came back another flip resultlacerated fingers required medical attention Several years ago government agency work received petition issue federal regulation would require model airplane engines sold self-contained remotely-operated self-starter time onboard self-starter yet reach market place Needless say petition rejected Since isnt economically practical have self-starters model engines have accept some us will end up feeding fingers through prop use hand-starting techniques happens once full-scale pilotswith obviously dire consequences column can hope periodically remind careful starting adjusting engines can afford use electric starter As alternative use glove chicken stick RC modeler always start engine low throttle move behind prop arc before advancing full throttle adjust mixture fly models equipped engines throttles can urge exercise extra degree caution Try minimize time must spend prop arc final word clarify role contributing editor Model nation magazine None us employed full-time magazine nor us see what will appear magazine other own columns until reaches mail boxes same time reaches yours safety column writer responsible ensuring magazine depicts safe activi ties Thats editors job RMcM letter received month chastised us allowing cartoon appeared page 126 November issue depicted RC Helicopter being flown around head lady Continued page 104 14 Model Aviation NO PLAY SUPER PRECISION THROTTLE MAKES HOOK-UPS TAKES CARE OF ANY MISALIGNMENT new 4 piece threaded ball link set fits perfectly servo arm holes beicranks nylon horns throt tle arms Strong easy hook up Just bolt 85 U3GAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience CONTROl modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control IVIS41 1-i Futaba____ sales ser IS.ipment imported byo Line 2RAFTF2~-e JR-PROPO rado cus Hobbies 1925 E Creighton Road Pensacola FL 32504 904/478-6745 Safety Preston Continued page 14 seated lawn chair promptly swatted out sky fly swatter Quite frankly dont see anything objectionable cartoon safety point view photograph rather cartoon might think differently However correspondent believes too yoyo types out would fly close people especially because saw magazine So addition wishing safe month yoyo types out keep thy RC choppers away folks lest thou get chopped fly swatter John Prestoz 7012 Eliira Couri Falls Church VA 22042 Chicago Expo/Wtschers Cohtinued page 18 Scale model exhibitions Chicago Expo no exception Pattern Spcrt models minority Giant Scale over whelming quantity past Fifty trophies awarded 20 categories individual awards best finishes First place Military Sport Scale class won superb Bell RP-63G target plane Weldon Smith Since last seen Kinecobra has its engine changed Rossi 90 special head fins adequate cooling engine buried deep fuselage rear prototype long extension shaft reaching through beneath cockpit belt reduction bi ESO SPOI S CALIFC SPORT R/C FOR BARNSTORMERS AND STUDENTS nose See August 1981 issue MA detailed description model prove kit airplanes can win Robert Walkers first place Non-Military Sport Scale entry Beechcraft Bonanza E modified Byron kit Paul Clements winner best Pattern plane award also best finish trophy Skynight 6 plane lays rest myth well-finished models never fly Pauls ship has hundreds competition flights Richard Quinlan acquired couple first place trophies Helicopter class Kavan OH-S 8A other Giant class Piper 1-3 Cub An unusual winner Sport Scale Sailplane class Messerschmitt ME-163 Komet rocket plane Mark Weber Scott Christensens Sagitta 900 winner General Sailplane class Contributing success Chicago Expo local hobby industry prominence among commercial exhibitors including well-known namesof Midwest Du-Bro Bridi Robart Gold berg Top Flite augmented nearby Sig Mfg Bud Nosen Byron Originals Kitty Hawk Flite Glas Other exhibitors come great distances Lifting show out strictly local class displays Kraft Royal Elec tronics Ace KC Eastcraft Specialty Products Circus Hobbies MRC AMA six organizations displays writing advertisers mention read about Model Aviation 104 Model Aviation James Oram L Ralph Warner Ram Radio Controlled Products booth market fail-safe devices lighting systems pilotfigures SCALE R/C JEMCO SPORT SCALE BALSA COVEREO FOAM WING CORES
Edition: Model Aviation - 1982/02
Page Numbers: 10, 14, 104
QAUUFE~T ~1FLI1 OMES FIRST Working foam plastic can have un expected effects body 0 John Preston WOULD YOU BELIEVE Styrofoam may hazardous health Before describe perhaps should define what mean Styro foam registered trademark Dow Chemical Company best knowledge foam material used manufacture coffee cups ready-to-fly model aircraft material talking about usually sold large sheets varying thickness very often used home insulation may also purchased modelers make foam wing cores sold sheet form usually has paper covering side Styrofoam name together name manufacturer printed letter Ben Brackett Cincinnati OH describes what can happen unwary helping schoolteacher friend work up some boat hulls Styrofoam class project came down pre-flu symptomsdrunk skunk tired achey everything ele vated temperature Well make long story short after staying out workshop two days felt okay 15 minutes hot-wire cutting almost put ear school teacher friend wrote Dow kind enough send enclosed booklet Although Bens case hazard resulted cutting Styrofoam using hot wire same problem can occur during sawing shaping grinding operation explanation Bens misfortune contained Dow booklet extracts follow Styrofoam brand plastic foam made pushing chemical gas melted plastic making foam cools forms solid lightweight Styrofoam brand plastic foam know plastic harmless polystyrene gas methyl chloridea chemical gas can represent potential hazard breathe too much Most methyl chloride gas escapes Styrofoam brand plastic foam before work some stays locked cut saw Styrofoam brand plastic foam foam walls broken letting out gas can cause problem too much gas released stays work area Some first signs overexposure methyl chloride gas dizziness staggering blurred vision Sometimes signs may show up day two later recovery may take several days depending amount exposure Since first results overexposure similar being drunk person suffering such effects will have hard time working safely Such person wont able control actions risks injury himself others avoid overexposure methyl chloride gas properly operate maintain equipment exhaust fans Practice good housekeeping keep finished pieces waste storage minimum Have plenty fresh air around operation dont work Styrofoam brand plastic foam small poorly-ventilated area room short human body designed breathe fresh air asked operate environment polluted other gases may function too well orif concentration pollutants high enoughit may completely cease function workshops need ventila tion Does yours have exhaust fan Recent conversations couple modeler friends together letter Australia indicate its time return old topic propellers First letter David Hipperson Victoria Park W Australia wrote tell us blade-shedding incident wooden propeller Daves wife bought him first big motor 22cc Tartan Equipped 18 x 6 prop checked balance pick up Daves story after engine run once robust test stand allowed cool gloated told wife done good thing Came back checked bolts prop nut filled tank started motor Moved rear did sharp pop something light-coloured shot through air followed two three seconds vibration before could shut down motor sharp crack propeller prop nut washer prop driver flew through air Believe vibration smoothed com pletely would say motor would have run perfectly well shaft ttle wasnt chancing that motor shut down pronto inspection found blade tip sheared off some pretty dappled effects could seenI would guess sort quarter-grain effect No damage motor cup tea restored tattered nerves have used companys props before greatbut blame myself realizing failure could occur area like curestraight grain propellers now onand great care making sure Im well out harms way first incident weve heard involved spontaneous shedding blade wooden prop However problem commonly associated plastic props What surprising case happened engine would guess couldnt have turning 3000 4000rpm maybe less since full bore Tartan 18 x 6 prop will turn about 7000 rpm could argue since Tartan converted industrial engine probably vibrates lot just friend Bill Winter has Tartan -scale Aristocrat find smoothest industrial engine conversions think Dave correct diagnosis grain wood culprit Since 18 x 6 doesnt come cheap suggest modelers take little extra time examine before purchase good example product better purchased local hobby store can see what Continued page 14 10 Model Aviation Ij YOU THE &UV WITW THE MODEL AIRPLANE FOR SALE r SNAP-ON BALL LINKS 2-56 THREADED COUPLER INCL BOLT-ON LINK 3-piece ball link set No 180 must helicopters readily adaptable rudder elevator servo linkage R/C planes boats cars Ball joint action eliminates binding neat clean appearance OnlV 85C fl 0 THREADED FOR 4-40 ROD OR BOLT N TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT I, L2 V THREADED LINK 5-Piece ball link set No 181 excelient off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon ball link Easily adjustable Only 85C AIRCRAFT QUALITY HIGH STRENGTH STEEL 0 1/8 TRIM ADJUSTMENT 4-Piece ball link set No 182 prefer permanent installation Includes nylon link threaded coupler steel ball pin washer peening Absolutely no linkage play ball links used Nylon link helps reduce viabration looks good tool Only 85C AILERON HORN WIRE Excellent hook up assemblyforstripailerons Eliminates differential throw No 189 .2Sets $ 1/16 THREADED BALL LINK No190 BALL LINK SOCKETS Extra nylon sockets styles Du-bro ball links No188 .4 $100 PR00mm DU-BRO PRODUCTS U INCORPORATED Banner Road Wauconda Illinois 60084 USA getting rather discount mail order house Daves incident thanks prudence moving location behind engine after starting did result injury local modeler friend fortunate inadvertently grabbed handful blades prop being turned 90 engine friend shall nameless since starting motor unaided common practice engine size goes past 60 think time have helper friends case engine started low throttle radio transmitter lying ground within easy reach Nobody sure exactly what happened either rag blown wind across transmitter throttle stick friend accidently dragged across stick Anyway engine went full bore prevent being struck prop some groin area friend put up right hand arrested plane prop motor three fingers result trip hospital loss use right hand several weeks maybe permanent loss use fingers Miraculously no fingers lost nor bones broken told friend just loss use ones dominant hand few weeks sufficient cause very careful future last propeller incident happened own clubs field came us second-hand via another club member Quadra-powered model being started hand propping showing no sign firing let alone starting Its owner apparently becoming complacent flipping prop great rapidity engine caught warning immedi ately stopped hand came back another flip resultlacerated fingers required medical attention Several years ago government agency work received petition issue federal regulation would require model airplane engines sold self-contained remotely-operated self-starter time onboard self-starter yet reach market place Needless say petition rejected Since isnt economically practical have self-starters model engines have accept some us will end up feeding fingers through prop use hand-starting techniques happens once full-scale pilotswith obviously dire consequences column can hope periodically remind careful starting adjusting engines can afford use electric starter As alternative use glove chicken stick RC modeler always start engine low throttle move behind prop arc before advancing full throttle adjust mixture fly models equipped engines throttles can urge exercise extra degree caution Try minimize time must spend prop arc final word clarify role contributing editor Model nation magazine None us employed full-time magazine nor us see what will appear magazine other own columns until reaches mail boxes same time reaches yours safety column writer responsible ensuring magazine depicts safe activi ties Thats editors job RMcM letter received month chastised us allowing cartoon appeared page 126 November issue depicted RC Helicopter being flown around head lady Continued page 104 14 Model Aviation NO PLAY SUPER PRECISION THROTTLE MAKES HOOK-UPS TAKES CARE OF ANY MISALIGNMENT new 4 piece threaded ball link set fits perfectly servo arm holes beicranks nylon horns throt tle arms Strong easy hook up Just bolt 85 U3GAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience CONTROl modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control IVIS41 1-i Futaba____ sales ser IS.ipment imported byo Line 2RAFTF2~-e JR-PROPO rado cus Hobbies 1925 E Creighton Road Pensacola FL 32504 904/478-6745 Safety Preston Continued page 14 seated lawn chair promptly swatted out sky fly swatter Quite frankly dont see anything objectionable cartoon safety point view photograph rather cartoon might think differently However correspondent believes too yoyo types out would fly close people especially because saw magazine So addition wishing safe month yoyo types out keep thy RC choppers away folks lest thou get chopped fly swatter John Prestoz 7012 Eliira Couri Falls Church VA 22042 Chicago Expo/Wtschers Cohtinued page 18 Scale model exhibitions Chicago Expo no exception Pattern Spcrt models minority Giant Scale over whelming quantity past Fifty trophies awarded 20 categories individual awards best finishes First place Military Sport Scale class won superb Bell RP-63G target plane Weldon Smith Since last seen Kinecobra has its engine changed Rossi 90 special head fins adequate cooling engine buried deep fuselage rear prototype long extension shaft reaching through beneath cockpit belt reduction bi ESO SPOI S CALIFC SPORT R/C FOR BARNSTORMERS AND STUDENTS nose See August 1981 issue MA detailed description model prove kit airplanes can win Robert Walkers first place Non-Military Sport Scale entry Beechcraft Bonanza E modified Byron kit Paul Clements winner best Pattern plane award also best finish trophy Skynight 6 plane lays rest myth well-finished models never fly Pauls ship has hundreds competition flights Richard Quinlan acquired couple first place trophies Helicopter class Kavan OH-S 8A other Giant class Piper 1-3 Cub An unusual winner Sport Scale Sailplane class Messerschmitt ME-163 Komet rocket plane Mark Weber Scott Christensens Sagitta 900 winner General Sailplane class Contributing success Chicago Expo local hobby industry prominence among commercial exhibitors including well-known namesof Midwest Du-Bro Bridi Robart Gold berg Top Flite augmented nearby Sig Mfg Bud Nosen Byron Originals Kitty Hawk Flite Glas Other exhibitors come great distances Lifting show out strictly local class displays Kraft Royal Elec tronics Ace KC Eastcraft Specialty Products Circus Hobbies MRC AMA six organizations displays writing advertisers mention read about Model Aviation 104 Model Aviation James Oram L Ralph Warner Ram Radio Controlled Products booth market fail-safe devices lighting systems pilotfigures SCALE R/C JEMCO SPORT SCALE BALSA COVEREO FOAM WING CORES