John Preston Safety Comes First Epoxy allergies revisited buddy system could save life Four-stroke engines still throw props EPOXY ALLERGIES several previous Safety columns Ive discussed allergic reactions readers have experienced after using epoxy glues paints few weeks ago received note Virgil Pollock MeHenry IL tached copy letter subject re cently appeared EAA Magazine Sport Aviation letter written EAA member Allen Kennedy claims have found solu tion epoxy-allergy problems Allens letter follows am writing because just possibly have run something importance have build ing Dragonfly past 4/2 years have fighting epoxy allergy After first few months hands below elbow would blister peel though burned As immediate reaction also other factors consider time did blame epoxyparticularly Safe-T-Poxy advertised absolutely safe time After determined problem ep oxy wrote inquiry article Sport Aviation heralded herbal tea supposed give immediate relief turned out ad lifetime high-cost program left cold keep thinking EAA help other fellowship airmen recalled reading about method increas ing oils body help correct effects exposure long dry winters article stated have need oil will actually taste good require it may As part effect epoxy allergy extremely dry cracking skin leaves after bum heals tried tablespoon cold-pressed safflower oil effect ovemight took tablespoon day now occasionally worked epoxy nearly two weeks hands still itching cracking extremely sensitive next day after taking oil itching stopped began gradual improvement care can now work epoxy again After three four months now have fingerprints back can work garden skin crack ing open time move Part reason retired carpentry work 1983 because hands messed up epoxy As am already middleaged 65 also take Vitamins E B Cin moderate doses None effect until tried unsaturated oil Good luckand does anyone good would nice hear Staying subject epoxy its health effects body recent letter Jim Turner Mountainside NJ described what sounds like much serious reaction experi enced may have result use epoxy glue Jims description symptoms follows As RC modeler have using epoxy glues construction models 18 years time period have noticed serious aftereffects until recently few years ago started using cyanoacrylate CyA glues have some severe bouts sinus drainage can last few days week Also red spots blotches last day appear around nose mouth area Over 1984 Christmas holi4ay vaca tion work afforded good days building during vacation en countered irregular heartbeat prompted doctor EKG printout irregular would frighten anyone doctor gave medication made appointment echogram Following stress test two-week period spent about $1 OOO doctor bills treatment Within short time everything back normal until 1985-86 Christmas holiday crossed mind problem may have cyanoacrylate glue did use during period After few days however did use about three small mixes five-minute epoxy glue night next day heartbeat irregular seems proof epoxy glue especially five-minute kind get along problem working winter basement windows closed up no ventilation hope may help some read ers have similar symptoms aware potential problem Unfortunately have no evidence cor roborate Jims belief symptoms caused use epoxy glue have seen other account airline pilot alleged Continued page 20 18 Model Aviation 2 ri-I i 3OM BUDDY SVSTEM YOLC supposs HELP ME WI4EH T4tNGS 4c WR0N mn provided addreu items concern regarding safet3p aspects model aviation activities Content column hewevr opinion 1 author des necessarily represent official position Academy 1 Medel Aeronautics Before leaving subject epoxy its pos sible effects health have two other ques tions put readers column hope someone may have answer first con cerns heating epoxy microwave oven make flow easily February 1987 column mentioned letter Graham Hicks seen tip another model magazine described ill effects suffered several years previously followed procedure According Grahams doctor Certain types epoxies heated manner give off lethal fumes have able verify statement would appreciate anyone can verify refute Meanwhile must warm epoxy make runny suggest place two bottles containing unmixed components warm-water bath prior mixing have used procedure past have suffered no ill effects However aware warm epoxy may start cure sooner mixed room temperature second question readers concerns arti cle appeared club newsletter re cently received stated Health Safety Division 3-M Company warns hazardous iso-cyanate vapors formed epoxy paint mixed its catalyst such hazardous vapors result certain multi-component polyurethane paints such Dupont Imron mixed am aware epoxy paint produces such vapors reader has information associates iso-cyanate vapors epoxy paint Id like hear buddy system Back 1980 column published list suggested rules safe operation RC flying field sugges tions rule would stipulate NEVER FLY ALONE Some readers took issue suggestion grounds flying alone impossible injure fellow club member guess people didnt consider likely injuries occuring flying field will self-inflicted Letters Ive received during eight years Ive writing column document self-inflicted injuries far common letters also show number cases self-inflicted injury oc cued modeler involved alone flying field may have able summon help Hence suggestion never flyor attempt start engineif alone flying field Several months ago letter received magazine related account unusual incident led its writer George Werber conclude safer have buddy flying field fly oneself Georges letter following account August 1985 son Bill flying H-Ray OS 25-powered plane north end flying field Westford Massachusetts enormous swamp least mile long V3-mile wide As flying over said Please dont fly over swamp area made sharp turn come back sure enough Swamp Monster got us wing snapped Continued page 22 have similar experience later Meanwhile column has previously stated believed have false allegation would sure use effective respirator having very interested hearing readers pressurized fresh-air supply insist using may have information subject polyurethane paint containing iso-cyanates 20 Model Aviation [ m9@ pilots 1 1/6scalefullyposeablel2 action pilots dressed removable fabric flight gear time No painting assembly required WWI & Civilian weigh 6 oz WWII pilot has removable Parachute Mae West weighs 8 oz Add $325 per figure P&H Calif res add sales tax Allow 10 days delivery Note Pilots can also fly 1/5 scale ships Send Check money order MGA Enterprises PO Box 626 Dept Fresno Calif 93709 turn knew going bad day swamp reeds way over head nonnally sink muck somewhere between knees waist So its slow going cant see very far wore old pair pants old sneakers still goo someplace sun went down quit retumed home showered found kinds little animal critters between toes next day Sunday weather foul field alone Slowly working way through swamp back forth grid pattern saw round area nothing growing perhaps about nine feet diameter Since mind focused looking plane didnt think too important soon found out what sank up chest Yup Quicksand Would believe took 20 minutes struggle out spot 56 years age Im no spring chicken anymore enough quit went home deciding wasnt worth take kinds risks buddy system safest way go instead doing alone isnt end story Six months later middle Febmary 1986 phone rang president club Art Coreman said flying field skis plane couple snowmobilers came out swamp area told him seen planes tail ice phone call came 900 pm 1000 pm son back out swamp pitch black 100 F temperature time walking top ice much simpler Sure enough found tail began cutting ship out Since ice 18-in thick quite job make sure didnt hit plane axe shovel cut extra-large hole police usually patrol area about once hour hoped wouldnt spot us Lets face cutting coffin-sized hole swamp middle night would have put handcuffs us real quick could have spent rest night pokey finally dragged big chunk ice car let thaw out basement After thoroughly washing drying engine radio servos found everything te OK except burned-out servo outer surface engine uniformly dull call special swamp finish Conclusion never never fly over swamp area anymore will always use buddy system safety Four-stroke engines continue receive trickle reports about incidents props four-stroke engines either shatter thrown off shaft Just month ago Bob Hundemer friend some years breaking 05 90 test stand experienced prop ex plosion incident during run-in period engine previously run consumed about 24 oz four-stroke fuel no problems experienced 14 x 6 prop drilled accept pins hub accordance manufacturers instructions engine being run rich mixture producing 8800 rpm full throttle battery left connected glow plug Just before prop exploded slight tick ing sound heard coming engine Fortunately no path prop hub failed threw pieces much 30 ft engine appears props pinned drive washer four-stroke engines possi bility blade-shedding incident other Continued page 124 22 Model Aviation tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16
Edition: Model Aviation - 1987/09
Page Numbers: 18, 20, 22, 124
John Preston Safety Comes First Epoxy allergies revisited buddy system could save life Four-stroke engines still throw props EPOXY ALLERGIES several previous Safety columns Ive discussed allergic reactions readers have experienced after using epoxy glues paints few weeks ago received note Virgil Pollock MeHenry IL tached copy letter subject re cently appeared EAA Magazine Sport Aviation letter written EAA member Allen Kennedy claims have found solu tion epoxy-allergy problems Allens letter follows am writing because just possibly have run something importance have build ing Dragonfly past 4/2 years have fighting epoxy allergy After first few months hands below elbow would blister peel though burned As immediate reaction also other factors consider time did blame epoxyparticularly Safe-T-Poxy advertised absolutely safe time After determined problem ep oxy wrote inquiry article Sport Aviation heralded herbal tea supposed give immediate relief turned out ad lifetime high-cost program left cold keep thinking EAA help other fellowship airmen recalled reading about method increas ing oils body help correct effects exposure long dry winters article stated have need oil will actually taste good require it may As part effect epoxy allergy extremely dry cracking skin leaves after bum heals tried tablespoon cold-pressed safflower oil effect ovemight took tablespoon day now occasionally worked epoxy nearly two weeks hands still itching cracking extremely sensitive next day after taking oil itching stopped began gradual improvement care can now work epoxy again After three four months now have fingerprints back can work garden skin crack ing open time move Part reason retired carpentry work 1983 because hands messed up epoxy As am already middleaged 65 also take Vitamins E B Cin moderate doses None effect until tried unsaturated oil Good luckand does anyone good would nice hear Staying subject epoxy its health effects body recent letter Jim Turner Mountainside NJ described what sounds like much serious reaction experi enced may have result use epoxy glue Jims description symptoms follows As RC modeler have using epoxy glues construction models 18 years time period have noticed serious aftereffects until recently few years ago started using cyanoacrylate CyA glues have some severe bouts sinus drainage can last few days week Also red spots blotches last day appear around nose mouth area Over 1984 Christmas holi4ay vaca tion work afforded good days building during vacation en countered irregular heartbeat prompted doctor EKG printout irregular would frighten anyone doctor gave medication made appointment echogram Following stress test two-week period spent about $1 OOO doctor bills treatment Within short time everything back normal until 1985-86 Christmas holiday crossed mind problem may have cyanoacrylate glue did use during period After few days however did use about three small mixes five-minute epoxy glue night next day heartbeat irregular seems proof epoxy glue especially five-minute kind get along problem working winter basement windows closed up no ventilation hope may help some read ers have similar symptoms aware potential problem Unfortunately have no evidence cor roborate Jims belief symptoms caused use epoxy glue have seen other account airline pilot alleged Continued page 20 18 Model Aviation 2 ri-I i 3OM BUDDY SVSTEM YOLC supposs HELP ME WI4EH T4tNGS 4c WR0N mn provided addreu items concern regarding safet3p aspects model aviation activities Content column hewevr opinion 1 author des necessarily represent official position Academy 1 Medel Aeronautics Before leaving subject epoxy its pos sible effects health have two other ques tions put readers column hope someone may have answer first con cerns heating epoxy microwave oven make flow easily February 1987 column mentioned letter Graham Hicks seen tip another model magazine described ill effects suffered several years previously followed procedure According Grahams doctor Certain types epoxies heated manner give off lethal fumes have able verify statement would appreciate anyone can verify refute Meanwhile must warm epoxy make runny suggest place two bottles containing unmixed components warm-water bath prior mixing have used procedure past have suffered no ill effects However aware warm epoxy may start cure sooner mixed room temperature second question readers concerns arti cle appeared club newsletter re cently received stated Health Safety Division 3-M Company warns hazardous iso-cyanate vapors formed epoxy paint mixed its catalyst such hazardous vapors result certain multi-component polyurethane paints such Dupont Imron mixed am aware epoxy paint produces such vapors reader has information associates iso-cyanate vapors epoxy paint Id like hear buddy system Back 1980 column published list suggested rules safe operation RC flying field sugges tions rule would stipulate NEVER FLY ALONE Some readers took issue suggestion grounds flying alone impossible injure fellow club member guess people didnt consider likely injuries occuring flying field will self-inflicted Letters Ive received during eight years Ive writing column document self-inflicted injuries far common letters also show number cases self-inflicted injury oc cued modeler involved alone flying field may have able summon help Hence suggestion never flyor attempt start engineif alone flying field Several months ago letter received magazine related account unusual incident led its writer George Werber conclude safer have buddy flying field fly oneself Georges letter following account August 1985 son Bill flying H-Ray OS 25-powered plane north end flying field Westford Massachusetts enormous swamp least mile long V3-mile wide As flying over said Please dont fly over swamp area made sharp turn come back sure enough Swamp Monster got us wing snapped Continued page 22 have similar experience later Meanwhile column has previously stated believed have false allegation would sure use effective respirator having very interested hearing readers pressurized fresh-air supply insist using may have information subject polyurethane paint containing iso-cyanates 20 Model Aviation [ m9@ pilots 1 1/6scalefullyposeablel2 action pilots dressed removable fabric flight gear time No painting assembly required WWI & Civilian weigh 6 oz WWII pilot has removable Parachute Mae West weighs 8 oz Add $325 per figure P&H Calif res add sales tax Allow 10 days delivery Note Pilots can also fly 1/5 scale ships Send Check money order MGA Enterprises PO Box 626 Dept Fresno Calif 93709 turn knew going bad day swamp reeds way over head nonnally sink muck somewhere between knees waist So its slow going cant see very far wore old pair pants old sneakers still goo someplace sun went down quit retumed home showered found kinds little animal critters between toes next day Sunday weather foul field alone Slowly working way through swamp back forth grid pattern saw round area nothing growing perhaps about nine feet diameter Since mind focused looking plane didnt think too important soon found out what sank up chest Yup Quicksand Would believe took 20 minutes struggle out spot 56 years age Im no spring chicken anymore enough quit went home deciding wasnt worth take kinds risks buddy system safest way go instead doing alone isnt end story Six months later middle Febmary 1986 phone rang president club Art Coreman said flying field skis plane couple snowmobilers came out swamp area told him seen planes tail ice phone call came 900 pm 1000 pm son back out swamp pitch black 100 F temperature time walking top ice much simpler Sure enough found tail began cutting ship out Since ice 18-in thick quite job make sure didnt hit plane axe shovel cut extra-large hole police usually patrol area about once hour hoped wouldnt spot us Lets face cutting coffin-sized hole swamp middle night would have put handcuffs us real quick could have spent rest night pokey finally dragged big chunk ice car let thaw out basement After thoroughly washing drying engine radio servos found everything te OK except burned-out servo outer surface engine uniformly dull call special swamp finish Conclusion never never fly over swamp area anymore will always use buddy system safety Four-stroke engines continue receive trickle reports about incidents props four-stroke engines either shatter thrown off shaft Just month ago Bob Hundemer friend some years breaking 05 90 test stand experienced prop ex plosion incident during run-in period engine previously run consumed about 24 oz four-stroke fuel no problems experienced 14 x 6 prop drilled accept pins hub accordance manufacturers instructions engine being run rich mixture producing 8800 rpm full throttle battery left connected glow plug Just before prop exploded slight tick ing sound heard coming engine Fortunately no path prop hub failed threw pieces much 30 ft engine appears props pinned drive washer four-stroke engines possi bility blade-shedding incident other Continued page 124 22 Model Aviation tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16
Edition: Model Aviation - 1987/09
Page Numbers: 18, 20, 22, 124
John Preston Safety Comes First Epoxy allergies revisited buddy system could save life Four-stroke engines still throw props EPOXY ALLERGIES several previous Safety columns Ive discussed allergic reactions readers have experienced after using epoxy glues paints few weeks ago received note Virgil Pollock MeHenry IL tached copy letter subject re cently appeared EAA Magazine Sport Aviation letter written EAA member Allen Kennedy claims have found solu tion epoxy-allergy problems Allens letter follows am writing because just possibly have run something importance have build ing Dragonfly past 4/2 years have fighting epoxy allergy After first few months hands below elbow would blister peel though burned As immediate reaction also other factors consider time did blame epoxyparticularly Safe-T-Poxy advertised absolutely safe time After determined problem ep oxy wrote inquiry article Sport Aviation heralded herbal tea supposed give immediate relief turned out ad lifetime high-cost program left cold keep thinking EAA help other fellowship airmen recalled reading about method increas ing oils body help correct effects exposure long dry winters article stated have need oil will actually taste good require it may As part effect epoxy allergy extremely dry cracking skin leaves after bum heals tried tablespoon cold-pressed safflower oil effect ovemight took tablespoon day now occasionally worked epoxy nearly two weeks hands still itching cracking extremely sensitive next day after taking oil itching stopped began gradual improvement care can now work epoxy again After three four months now have fingerprints back can work garden skin crack ing open time move Part reason retired carpentry work 1983 because hands messed up epoxy As am already middleaged 65 also take Vitamins E B Cin moderate doses None effect until tried unsaturated oil Good luckand does anyone good would nice hear Staying subject epoxy its health effects body recent letter Jim Turner Mountainside NJ described what sounds like much serious reaction experi enced may have result use epoxy glue Jims description symptoms follows As RC modeler have using epoxy glues construction models 18 years time period have noticed serious aftereffects until recently few years ago started using cyanoacrylate CyA glues have some severe bouts sinus drainage can last few days week Also red spots blotches last day appear around nose mouth area Over 1984 Christmas holi4ay vaca tion work afforded good days building during vacation en countered irregular heartbeat prompted doctor EKG printout irregular would frighten anyone doctor gave medication made appointment echogram Following stress test two-week period spent about $1 OOO doctor bills treatment Within short time everything back normal until 1985-86 Christmas holiday crossed mind problem may have cyanoacrylate glue did use during period After few days however did use about three small mixes five-minute epoxy glue night next day heartbeat irregular seems proof epoxy glue especially five-minute kind get along problem working winter basement windows closed up no ventilation hope may help some read ers have similar symptoms aware potential problem Unfortunately have no evidence cor roborate Jims belief symptoms caused use epoxy glue have seen other account airline pilot alleged Continued page 20 18 Model Aviation 2 ri-I i 3OM BUDDY SVSTEM YOLC supposs HELP ME WI4EH T4tNGS 4c WR0N mn provided addreu items concern regarding safet3p aspects model aviation activities Content column hewevr opinion 1 author des necessarily represent official position Academy 1 Medel Aeronautics Before leaving subject epoxy its pos sible effects health have two other ques tions put readers column hope someone may have answer first con cerns heating epoxy microwave oven make flow easily February 1987 column mentioned letter Graham Hicks seen tip another model magazine described ill effects suffered several years previously followed procedure According Grahams doctor Certain types epoxies heated manner give off lethal fumes have able verify statement would appreciate anyone can verify refute Meanwhile must warm epoxy make runny suggest place two bottles containing unmixed components warm-water bath prior mixing have used procedure past have suffered no ill effects However aware warm epoxy may start cure sooner mixed room temperature second question readers concerns arti cle appeared club newsletter re cently received stated Health Safety Division 3-M Company warns hazardous iso-cyanate vapors formed epoxy paint mixed its catalyst such hazardous vapors result certain multi-component polyurethane paints such Dupont Imron mixed am aware epoxy paint produces such vapors reader has information associates iso-cyanate vapors epoxy paint Id like hear buddy system Back 1980 column published list suggested rules safe operation RC flying field sugges tions rule would stipulate NEVER FLY ALONE Some readers took issue suggestion grounds flying alone impossible injure fellow club member guess people didnt consider likely injuries occuring flying field will self-inflicted Letters Ive received during eight years Ive writing column document self-inflicted injuries far common letters also show number cases self-inflicted injury oc cued modeler involved alone flying field may have able summon help Hence suggestion never flyor attempt start engineif alone flying field Several months ago letter received magazine related account unusual incident led its writer George Werber conclude safer have buddy flying field fly oneself Georges letter following account August 1985 son Bill flying H-Ray OS 25-powered plane north end flying field Westford Massachusetts enormous swamp least mile long V3-mile wide As flying over said Please dont fly over swamp area made sharp turn come back sure enough Swamp Monster got us wing snapped Continued page 22 have similar experience later Meanwhile column has previously stated believed have false allegation would sure use effective respirator having very interested hearing readers pressurized fresh-air supply insist using may have information subject polyurethane paint containing iso-cyanates 20 Model Aviation [ m9@ pilots 1 1/6scalefullyposeablel2 action pilots dressed removable fabric flight gear time No painting assembly required WWI & Civilian weigh 6 oz WWII pilot has removable Parachute Mae West weighs 8 oz Add $325 per figure P&H Calif res add sales tax Allow 10 days delivery Note Pilots can also fly 1/5 scale ships Send Check money order MGA Enterprises PO Box 626 Dept Fresno Calif 93709 turn knew going bad day swamp reeds way over head nonnally sink muck somewhere between knees waist So its slow going cant see very far wore old pair pants old sneakers still goo someplace sun went down quit retumed home showered found kinds little animal critters between toes next day Sunday weather foul field alone Slowly working way through swamp back forth grid pattern saw round area nothing growing perhaps about nine feet diameter Since mind focused looking plane didnt think too important soon found out what sank up chest Yup Quicksand Would believe took 20 minutes struggle out spot 56 years age Im no spring chicken anymore enough quit went home deciding wasnt worth take kinds risks buddy system safest way go instead doing alone isnt end story Six months later middle Febmary 1986 phone rang president club Art Coreman said flying field skis plane couple snowmobilers came out swamp area told him seen planes tail ice phone call came 900 pm 1000 pm son back out swamp pitch black 100 F temperature time walking top ice much simpler Sure enough found tail began cutting ship out Since ice 18-in thick quite job make sure didnt hit plane axe shovel cut extra-large hole police usually patrol area about once hour hoped wouldnt spot us Lets face cutting coffin-sized hole swamp middle night would have put handcuffs us real quick could have spent rest night pokey finally dragged big chunk ice car let thaw out basement After thoroughly washing drying engine radio servos found everything te OK except burned-out servo outer surface engine uniformly dull call special swamp finish Conclusion never never fly over swamp area anymore will always use buddy system safety Four-stroke engines continue receive trickle reports about incidents props four-stroke engines either shatter thrown off shaft Just month ago Bob Hundemer friend some years breaking 05 90 test stand experienced prop ex plosion incident during run-in period engine previously run consumed about 24 oz four-stroke fuel no problems experienced 14 x 6 prop drilled accept pins hub accordance manufacturers instructions engine being run rich mixture producing 8800 rpm full throttle battery left connected glow plug Just before prop exploded slight tick ing sound heard coming engine Fortunately no path prop hub failed threw pieces much 30 ft engine appears props pinned drive washer four-stroke engines possi bility blade-shedding incident other Continued page 124 22 Model Aviation tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16
Edition: Model Aviation - 1987/09
Page Numbers: 18, 20, 22, 124
John Preston Safety Comes First Epoxy allergies revisited buddy system could save life Four-stroke engines still throw props EPOXY ALLERGIES several previous Safety columns Ive discussed allergic reactions readers have experienced after using epoxy glues paints few weeks ago received note Virgil Pollock MeHenry IL tached copy letter subject re cently appeared EAA Magazine Sport Aviation letter written EAA member Allen Kennedy claims have found solu tion epoxy-allergy problems Allens letter follows am writing because just possibly have run something importance have build ing Dragonfly past 4/2 years have fighting epoxy allergy After first few months hands below elbow would blister peel though burned As immediate reaction also other factors consider time did blame epoxyparticularly Safe-T-Poxy advertised absolutely safe time After determined problem ep oxy wrote inquiry article Sport Aviation heralded herbal tea supposed give immediate relief turned out ad lifetime high-cost program left cold keep thinking EAA help other fellowship airmen recalled reading about method increas ing oils body help correct effects exposure long dry winters article stated have need oil will actually taste good require it may As part effect epoxy allergy extremely dry cracking skin leaves after bum heals tried tablespoon cold-pressed safflower oil effect ovemight took tablespoon day now occasionally worked epoxy nearly two weeks hands still itching cracking extremely sensitive next day after taking oil itching stopped began gradual improvement care can now work epoxy again After three four months now have fingerprints back can work garden skin crack ing open time move Part reason retired carpentry work 1983 because hands messed up epoxy As am already middleaged 65 also take Vitamins E B Cin moderate doses None effect until tried unsaturated oil Good luckand does anyone good would nice hear Staying subject epoxy its health effects body recent letter Jim Turner Mountainside NJ described what sounds like much serious reaction experi enced may have result use epoxy glue Jims description symptoms follows As RC modeler have using epoxy glues construction models 18 years time period have noticed serious aftereffects until recently few years ago started using cyanoacrylate CyA glues have some severe bouts sinus drainage can last few days week Also red spots blotches last day appear around nose mouth area Over 1984 Christmas holi4ay vaca tion work afforded good days building during vacation en countered irregular heartbeat prompted doctor EKG printout irregular would frighten anyone doctor gave medication made appointment echogram Following stress test two-week period spent about $1 OOO doctor bills treatment Within short time everything back normal until 1985-86 Christmas holiday crossed mind problem may have cyanoacrylate glue did use during period After few days however did use about three small mixes five-minute epoxy glue night next day heartbeat irregular seems proof epoxy glue especially five-minute kind get along problem working winter basement windows closed up no ventilation hope may help some read ers have similar symptoms aware potential problem Unfortunately have no evidence cor roborate Jims belief symptoms caused use epoxy glue have seen other account airline pilot alleged Continued page 20 18 Model Aviation 2 ri-I i 3OM BUDDY SVSTEM YOLC supposs HELP ME WI4EH T4tNGS 4c WR0N mn provided addreu items concern regarding safet3p aspects model aviation activities Content column hewevr opinion 1 author des necessarily represent official position Academy 1 Medel Aeronautics Before leaving subject epoxy its pos sible effects health have two other ques tions put readers column hope someone may have answer first con cerns heating epoxy microwave oven make flow easily February 1987 column mentioned letter Graham Hicks seen tip another model magazine described ill effects suffered several years previously followed procedure According Grahams doctor Certain types epoxies heated manner give off lethal fumes have able verify statement would appreciate anyone can verify refute Meanwhile must warm epoxy make runny suggest place two bottles containing unmixed components warm-water bath prior mixing have used procedure past have suffered no ill effects However aware warm epoxy may start cure sooner mixed room temperature second question readers concerns arti cle appeared club newsletter re cently received stated Health Safety Division 3-M Company warns hazardous iso-cyanate vapors formed epoxy paint mixed its catalyst such hazardous vapors result certain multi-component polyurethane paints such Dupont Imron mixed am aware epoxy paint produces such vapors reader has information associates iso-cyanate vapors epoxy paint Id like hear buddy system Back 1980 column published list suggested rules safe operation RC flying field sugges tions rule would stipulate NEVER FLY ALONE Some readers took issue suggestion grounds flying alone impossible injure fellow club member guess people didnt consider likely injuries occuring flying field will self-inflicted Letters Ive received during eight years Ive writing column document self-inflicted injuries far common letters also show number cases self-inflicted injury oc cued modeler involved alone flying field may have able summon help Hence suggestion never flyor attempt start engineif alone flying field Several months ago letter received magazine related account unusual incident led its writer George Werber conclude safer have buddy flying field fly oneself Georges letter following account August 1985 son Bill flying H-Ray OS 25-powered plane north end flying field Westford Massachusetts enormous swamp least mile long V3-mile wide As flying over said Please dont fly over swamp area made sharp turn come back sure enough Swamp Monster got us wing snapped Continued page 22 have similar experience later Meanwhile column has previously stated believed have false allegation would sure use effective respirator having very interested hearing readers pressurized fresh-air supply insist using may have information subject polyurethane paint containing iso-cyanates 20 Model Aviation [ m9@ pilots 1 1/6scalefullyposeablel2 action pilots dressed removable fabric flight gear time No painting assembly required WWI & Civilian weigh 6 oz WWII pilot has removable Parachute Mae West weighs 8 oz Add $325 per figure P&H Calif res add sales tax Allow 10 days delivery Note Pilots can also fly 1/5 scale ships Send Check money order MGA Enterprises PO Box 626 Dept Fresno Calif 93709 turn knew going bad day swamp reeds way over head nonnally sink muck somewhere between knees waist So its slow going cant see very far wore old pair pants old sneakers still goo someplace sun went down quit retumed home showered found kinds little animal critters between toes next day Sunday weather foul field alone Slowly working way through swamp back forth grid pattern saw round area nothing growing perhaps about nine feet diameter Since mind focused looking plane didnt think too important soon found out what sank up chest Yup Quicksand Would believe took 20 minutes struggle out spot 56 years age Im no spring chicken anymore enough quit went home deciding wasnt worth take kinds risks buddy system safest way go instead doing alone isnt end story Six months later middle Febmary 1986 phone rang president club Art Coreman said flying field skis plane couple snowmobilers came out swamp area told him seen planes tail ice phone call came 900 pm 1000 pm son back out swamp pitch black 100 F temperature time walking top ice much simpler Sure enough found tail began cutting ship out Since ice 18-in thick quite job make sure didnt hit plane axe shovel cut extra-large hole police usually patrol area about once hour hoped wouldnt spot us Lets face cutting coffin-sized hole swamp middle night would have put handcuffs us real quick could have spent rest night pokey finally dragged big chunk ice car let thaw out basement After thoroughly washing drying engine radio servos found everything te OK except burned-out servo outer surface engine uniformly dull call special swamp finish Conclusion never never fly over swamp area anymore will always use buddy system safety Four-stroke engines continue receive trickle reports about incidents props four-stroke engines either shatter thrown off shaft Just month ago Bob Hundemer friend some years breaking 05 90 test stand experienced prop ex plosion incident during run-in period engine previously run consumed about 24 oz four-stroke fuel no problems experienced 14 x 6 prop drilled accept pins hub accordance manufacturers instructions engine being run rich mixture producing 8800 rpm full throttle battery left connected glow plug Just before prop exploded slight tick ing sound heard coming engine Fortunately no path prop hub failed threw pieces much 30 ft engine appears props pinned drive washer four-stroke engines possi bility blade-shedding incident other Continued page 124 22 Model Aviation tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16