S unwslirst WE START months column quoting edi trrial Ed Fitzwater m February issue ne DCRC Newsletter Its title same column Safety Comes First John Preston first started writing safety article Model Aviation magazine thought would last about three months die lack copy Boy wrong Funny thing thoughthe read Johns articles remembered about similar things happened around over years Safety has become big deal. should wouldnt want get hit planelet alone think about hitting being hit Pattern Giant Scale ple. think goes saying dont fly over people near misses have seen Yeah too can talk about safety. can talk about safety. until think act safe careful manner airplanes things day n will safe Most accidents can avoided really try things safe manner Please remember SAFETY IS ATTITUDE Fitz main reason used Eds editorial open months column can found first sentence Like Ed thought column would die lack material during first year Thanks readers have managed find something say 28 issues maga zine However morning sat down typewriter 29th time hard time coming up opening paragraph until remembered Eds DCRC Newsletter editorial Eds comments about wanting hit plane let alone bigger brings us letter recently received Publisher Carl Wheeley John Burdick New Paltz NY Johns letter complimented publisher quality magazine stating.. feel Model Aviation has grown immensely now best presents fine balance articles Among favorites have historical articles. technical articles. monthly columns ticles unconventional modeling nt turned page two Johns letter hoping see column speci fically listed favorites us like receive warm fuzzy once However page 2 began follows thing have disliked recently statement safety editor Giant models no dangerous smaller models since least death occurred small model struck spectator specious logic degrees hazard small model much less likely produce injuries striking person currently popular monsters feel demonstrably lethal weapons have always felt AMA should have taken much stronger stand regarding sensible size weight power limits large models once wrote article intended submit MA detailing discussion safety hazards strikes small large models Safety tips battery chargers John Preston standpoint ot physicist am sort comparative hazards Giant Scale Pattern models gave up found couldnt rewrite fast enough keep up facts time chose new upper limit horrible example picture would appear model magazines showing still bigger heavier powerful model still abomi nate things both because lethal potential because feel inviting stringent government regulation perhaps abolition Radio Control modeling So instead warm fuzzy hoping page 2 Johns letter gave us cold prickly instead So cant please people time column devoted safety lets look statement appeared column think caused John dislike writings must have following appeared March1980 issue MA Recent very Apparently believe result collision between -scaler human being would significantly worse collision involving aconventional-sized model personally dont think serves purpose discuss issue since model has sufficient energy cause death strikes vulnerable body part know case Europe 1 9-powered trainer caused death 6-year-old boy some reason loss control occurred What trying say statement wasthatyoucantbe killeddeaderthandead five- six-pound model has sufficient energy cause death should strike person should hazardous struck 50- 60-pound monster some degree agree John specious logic wing 6-lb model may strike back head cause minor injury same strike wing 60-lb model likely cause serious injury death could use physics engineering principles since happen engineer either prove disprove statement example what influences hazard dur ing collision Should use kinetic energy compare hazard big versus small models small model might shown just hazardous big Since kinetic energy varies square velocity could say since small models will very often fly higher velocities big ones must hazardous As alter native kinetic energy might argue Continued page 12 10 Model Aviation 0 -cc SURELY YOURE NOT GOING TO LET GO OF TWAT MONSTER WITHOUT WEARING n OC USSLUC Y LIICLU ur LUUCtUEI U UaOLUC aIU SLFSCLU U 4 Gal Case 24 Gal126 Gal NitroPer GalPer Gal 0%575525 5%650575 10%750675 12%800725 15%825775 25%10501000 40%15001400 60%24002300 54 Gal Drum EA 13500 20500 26500 29600 33000 46600 66800 105800 Prixex xbjext change ithe,t ,otic Free delivery 14525126 gal deals USA 30854 gal drums freight collect FOB Clover SC Gallon price determined nitro content 8 total quantity ordered SC orders add 4% sales tax Shipping & handling fee $500 per package less $400 cash purchases NEWPower Booster e eng $12/qt S38/gal freight mci Use 3 ozigai S -S 803222-7488 J kit contains ii metal instrument cases machinedTho TATONE engine test turned plated Glasses diet backs precisioncast alaminum Cut fit cases Also Included selection ol twentyie hold sit size typicat Instrument dial faces instnjcttonsrom /eA 80 KtT SIZESudes 4 oz tank eases fittings completely dia400I die578assembled Tank strap anc 1. dia400f die7 50mounting screws Included %dls500I die850 Idia500 1 dia950 JQnIy 1496 TT Teach Bird Sing introducing new A-47 AUTOMATIC HOMING BEEPER IL nois residenfs add 6% sa/es fax] PO Box 94787 riECTRONiCSSchaumburg1L60194 damage occurs during collision result force generated point impact higher force equals damage Since force function mass de celeration moving object could say big model collides something both mass deceleration will higher same collision involving small model Before write tell us weve flipped wig because deceleration small model will higher due its higher speed lets consider distance over two models brought halt Deceleration inversely proportional distance over velocity reduced zero distance equals less deceleration Since components big model likely rigid small model less likely collapse crush during impact will therefore produce higher force since must stop shorter distance Being hit wing will collapse during impact preferable being hit has high strength doesnt collapse Automobiles crushable front ends safer collisions rigid front ends whole principle behind energy-absorbing bumpers required Federal Government currently-manufac tured cars another factor might considered assessing hazard different types model aircraft probability being struck risk being criticized segment hobby let us say time have felt uncomfortable watching models flight Pylon Race model going get away its pilot wed rather itwere slow fast Cries ofI aint got infrequent average RC field weekend its slow model pilot aint got cry might provide sufficient warning bystanders get bead take cover necessary None discussion really proves thing regard safety big versus small models However before getting onto another topic would like have opinion recent change AMA Safety Code meeting November 7/8 1981 AMA Executive Council deleted 40-lb weight limit effect since July 1 1979 applied model covered AMA liability insurance policy would like know members feel about change ask drop us card letter stating opinion include major area interest hobby ie FF Rubber CL Combat RC Pattern etc get sufficient response request will pub lish results future column Battery chargers As sat down write column friend called tell us about just zapped chargers RC equipment also know fellow allegedly set fire house trying charge some Ni-Cds too high rate similar experience could have resulted few years back made error hooking up Ni-Cd starter pack charger cases errors correct procedure charging batteries will result damaged equipment However ii paycheck has shrunk terms its former buying power much Im sure youd rather have lay out bucks ney charger just because werent paying atten tion hooked up old part chargers accompany new RC system essentially foolproof Polarized plugs prevent hooking up charger Continued page 92 12 Model Aviation Oneor 5 Gal Can30 Gal Drum Gal Per Gal 105062510300 115069514200 125077518400 132582520400 140085022400 1850110030400 2500160042500 3000260065400 Photo s snown necossari p nose completed Kits P47 Military Scale $180 INCLUDES Top Flight P-47 kit Rhom retracts Aerosport 6 channel radio 5 servos Fox Eagle 60 engine J-3 CUB Quarter Scale $227 INCLUDESBud Nosen 1/4 scale J-3 Cub kit Kraft 4 channel radio rvos Quadra engine mount & props S212 Super Hustler engine SUPER KAOS Fast & Fun $185 INCLUDES Bridi Super Kaos kit Proline 5 channel radio 4 servos OX Max 60 engine $205 Rhom retracts items shown plus HUNDREDS others individually offered sale recent issues Hobby Swap News model en thusiasts Used Equipment Guide BuySell-Trade first ad tree 50 words max subscription $10/yr 10 issues $19/2yr. $27/3yr Add $3/yr 1st class mail Canada & Mexico must use 1st class rates other countries write first MC & Visa Accepted include numbers expiration date Expect 4 8 weeks delivery 1st issue address changes Submit free ad B&W photo $2 extra subscription orders Hobby Swap News Dept AR-3 PO Box 834 Santa Marta CA 93456 LOWERING THE COST OF HAVING FUN Safety Preston Continued page 12 batteries backwards zapping charger friend did case hooking up batteries charger caused red charg ing indicator light glow before power cord charger inserted wall outlet should have alerted him something amiss since light tell batteries indeed being charged think glows after unit plugged AC source Failure indi cator glow could mean plugged switched outlet didnt turn wall switch could mean blown fuse also might have left transmitter receiver switch thereby connecting batteries Tx Rx circuitry instead charger friend thinks son charger recently loaned may have reversed polarity output plug match different brand radio Whatever reason result defunct charger story somewhat different occurred least eight years ago purchased some wet cell Ni-Cds club auction use starting batteries automotive battery charger cumbersome equipped Variac pressed service charge up batteries Some time later another club auc tion purchased small plug-in-the-wall charger tl Brand X variety paper sticker marked 1 2V wanted charge 12-volt gel-cell field box worked perfectly some time came night error thinking tried charge two wet-cell starting Ni-Cds connected series using small 2V charger charger kind equipped indicator light covered amber lens lets know allis well its use guess light also serves fuse since isnt other fuse circuitry connected two starting Ni-Cds did appear indicator light somewhat brighter normal late night brain didnt register anything amiss some reason dont remember what occasion return workshop before turning night immediately apparent problem some kind since strong odor burning insulation glance charger took diagnose source since brown sticky substance exuding its bottom indicator light bulb didnt blow dont know Presumably though current too much forthe chargers transformer handle still below rating bulb chargers metal case too hot pull out wall socket protection rag hand often break out goose bumps think what might have happened handt made return trip workshop prior hitting sack Its possible might have ended up different author pages moral stories unless know what youre doing dont mess around electrical equipment now have decent VOM think must serious modeler Micronta Radio Shack brand Cat No 22-207A isnt cheap est model Radio Shack sale catalog arrived just yesterday has Micronta VOM No 22-204 plenty good enough other serious electroncis hobbyist its sale price $2488 have number cheaper models too periodically will go sale closing months column wed like thank responded request infor mation allergic reactions epoxy glues appeared March 1982 issue will talk about after have-run down some leads provided readers Mean have experienced allergic reac tion epoxy buy small fan work shop keep glue off hands Have safe month John Preston 7012 Elvira Ct Falls Church VA 22042 WRAM Show/Myers Continued page 16 prepared recommended Phase-In Plan protect use old sets long possible Frequency-Flag Plan get away foreign streamers weak pastels cant tell orange brown red and/or dirty yellow Logic dictates eventually transmitters receivers will have synthesizers fre quency-changing switches few bucks transmitter could have monitor receiver built before switching transmitter could switch monitor make sure no nearby using frequency wouldnt protect inter ference coming somewhere off field would keep shooting buddy down being shot down yourself transmitter left impound area could worked transmitter switch would have go through Monitor position get the Transmit position Being Transmit would disable monitor wouldnt driven nutty noise Something manufacturers think about havent already went WRAM Show ask question What willing say publication about companys response impending change RC channels As reporter think its job ask questions would ask bore until believe answer Thats what did answer Anyone selling European market ready narrow-band radio now Kraft Futaba Sanwa Circus Hob bies name few other folks either say walting things settle out told things confidence about what youd expect think will have pretty good selection narrow-band radios choose around Christmas concerned about consequences new situation John Maloney president World Engines has offered following state ment recent edition newsletter Scratchpad going make commit ment right now just single frequency conversion wanted will convert equipment right now new frequencies retail price crystals plus reasonable charge handling postage What else happened WRAM Show Two things important First District II meetingheld WRAM Show John Byrne presiding gentleman see Ed Whittens Jr Flight AMA News section suggested AMA club should adopt school vicinity Ithink its capital idea idea club pay membership AMA faculty member arts/crafts teacher coach audio/visual leader person will pick up ball run buy member ship get ModelAviation Chartered 92 Model Aviation
Edition: Model Aviation - 1982/06
Page Numbers: 10, 12, 92
Edition: Model Aviation - 1982/06
Page Numbers: 10, 12, 92
S unwslirst WE START months column quoting edi trrial Ed Fitzwater m February issue ne DCRC Newsletter Its title same column Safety Comes First John Preston first started writing safety article Model Aviation magazine thought would last about three months die lack copy Boy wrong Funny thing thoughthe read Johns articles remembered about similar things happened around over years Safety has become big deal. should wouldnt want get hit planelet alone think about hitting being hit Pattern Giant Scale ple. think goes saying dont fly over people near misses have seen Yeah too can talk about safety. can talk about safety. until think act safe careful manner airplanes things day n will safe Most accidents can avoided really try things safe manner Please remember SAFETY IS ATTITUDE Fitz main reason used Eds editorial open months column can found first sentence Like Ed thought column would die lack material during first year Thanks readers have managed find something say 28 issues maga zine However morning sat down typewriter 29th time hard time coming up opening paragraph until remembered Eds DCRC Newsletter editorial Eds comments about wanting hit plane let alone bigger brings us letter recently received Publisher Carl Wheeley John Burdick New Paltz NY Johns letter complimented publisher quality magazine stating.. feel Model Aviation has grown immensely now best presents fine balance articles Among favorites have historical articles. technical articles. monthly columns ticles unconventional modeling nt turned page two Johns letter hoping see column speci fically listed favorites us like receive warm fuzzy once However page 2 began follows thing have disliked recently statement safety editor Giant models no dangerous smaller models since least death occurred small model struck spectator specious logic degrees hazard small model much less likely produce injuries striking person currently popular monsters feel demonstrably lethal weapons have always felt AMA should have taken much stronger stand regarding sensible size weight power limits large models once wrote article intended submit MA detailing discussion safety hazards strikes small large models Safety tips battery chargers John Preston standpoint ot physicist am sort comparative hazards Giant Scale Pattern models gave up found couldnt rewrite fast enough keep up facts time chose new upper limit horrible example picture would appear model magazines showing still bigger heavier powerful model still abomi nate things both because lethal potential because feel inviting stringent government regulation perhaps abolition Radio Control modeling So instead warm fuzzy hoping page 2 Johns letter gave us cold prickly instead So cant please people time column devoted safety lets look statement appeared column think caused John dislike writings must have following appeared March1980 issue MA Recent very Apparently believe result collision between -scaler human being would significantly worse collision involving aconventional-sized model personally dont think serves purpose discuss issue since model has sufficient energy cause death strikes vulnerable body part know case Europe 1 9-powered trainer caused death 6-year-old boy some reason loss control occurred What trying say statement wasthatyoucantbe killeddeaderthandead five- six-pound model has sufficient energy cause death should strike person should hazardous struck 50- 60-pound monster some degree agree John specious logic wing 6-lb model may strike back head cause minor injury same strike wing 60-lb model likely cause serious injury death could use physics engineering principles since happen engineer either prove disprove statement example what influences hazard dur ing collision Should use kinetic energy compare hazard big versus small models small model might shown just hazardous big Since kinetic energy varies square velocity could say since small models will very often fly higher velocities big ones must hazardous As alter native kinetic energy might argue Continued page 12 10 Model Aviation 0 -cc SURELY YOURE NOT GOING TO LET GO OF TWAT MONSTER WITHOUT WEARING n OC USSLUC Y LIICLU ur LUUCtUEI U UaOLUC aIU SLFSCLU U 4 Gal Case 24 Gal126 Gal NitroPer GalPer Gal 0%575525 5%650575 10%750675 12%800725 15%825775 25%10501000 40%15001400 60%24002300 54 Gal Drum EA 13500 20500 26500 29600 33000 46600 66800 105800 Prixex xbjext change ithe,t ,otic Free delivery 14525126 gal deals USA 30854 gal drums freight collect FOB Clover SC Gallon price determined nitro content 8 total quantity ordered SC orders add 4% sales tax Shipping & handling fee $500 per package less $400 cash purchases NEWPower Booster e eng $12/qt S38/gal freight mci Use 3 ozigai S -S 803222-7488 J kit contains ii metal instrument cases machinedTho TATONE engine test turned plated Glasses diet backs precisioncast alaminum Cut fit cases Also Included selection ol twentyie hold sit size typicat Instrument dial faces instnjcttonsrom /eA 80 KtT SIZESudes 4 oz tank eases fittings completely dia400I die578assembled Tank strap anc 1. dia400f die7 50mounting screws Included %dls500I die850 Idia500 1 dia950 JQnIy 1496 TT Teach Bird Sing introducing new A-47 AUTOMATIC HOMING BEEPER IL nois residenfs add 6% sa/es fax] PO Box 94787 riECTRONiCSSchaumburg1L60194 damage occurs during collision result force generated point impact higher force equals damage Since force function mass de celeration moving object could say big model collides something both mass deceleration will higher same collision involving small model Before write tell us weve flipped wig because deceleration small model will higher due its higher speed lets consider distance over two models brought halt Deceleration inversely proportional distance over velocity reduced zero distance equals less deceleration Since components big model likely rigid small model less likely collapse crush during impact will therefore produce higher force since must stop shorter distance Being hit wing will collapse during impact preferable being hit has high strength doesnt collapse Automobiles crushable front ends safer collisions rigid front ends whole principle behind energy-absorbing bumpers required Federal Government currently-manufac tured cars another factor might considered assessing hazard different types model aircraft probability being struck risk being criticized segment hobby let us say time have felt uncomfortable watching models flight Pylon Race model going get away its pilot wed rather itwere slow fast Cries ofI aint got infrequent average RC field weekend its slow model pilot aint got cry might provide sufficient warning bystanders get bead take cover necessary None discussion really proves thing regard safety big versus small models However before getting onto another topic would like have opinion recent change AMA Safety Code meeting November 7/8 1981 AMA Executive Council deleted 40-lb weight limit effect since July 1 1979 applied model covered AMA liability insurance policy would like know members feel about change ask drop us card letter stating opinion include major area interest hobby ie FF Rubber CL Combat RC Pattern etc get sufficient response request will pub lish results future column Battery chargers As sat down write column friend called tell us about just zapped chargers RC equipment also know fellow allegedly set fire house trying charge some Ni-Cds too high rate similar experience could have resulted few years back made error hooking up Ni-Cd starter pack charger cases errors correct procedure charging batteries will result damaged equipment However ii paycheck has shrunk terms its former buying power much Im sure youd rather have lay out bucks ney charger just because werent paying atten tion hooked up old part chargers accompany new RC system essentially foolproof Polarized plugs prevent hooking up charger Continued page 92 12 Model Aviation Oneor 5 Gal Can30 Gal Drum Gal Per Gal 105062510300 115069514200 125077518400 132582520400 140085022400 1850110030400 2500160042500 3000260065400 Photo s snown necossari p nose completed Kits P47 Military Scale $180 INCLUDES Top Flight P-47 kit Rhom retracts Aerosport 6 channel radio 5 servos Fox Eagle 60 engine J-3 CUB Quarter Scale $227 INCLUDESBud Nosen 1/4 scale J-3 Cub kit Kraft 4 channel radio rvos Quadra engine mount & props S212 Super Hustler engine SUPER KAOS Fast & Fun $185 INCLUDES Bridi Super Kaos kit Proline 5 channel radio 4 servos OX Max 60 engine $205 Rhom retracts items shown plus HUNDREDS others individually offered sale recent issues Hobby Swap News model en thusiasts Used Equipment Guide BuySell-Trade first ad tree 50 words max subscription $10/yr 10 issues $19/2yr. $27/3yr Add $3/yr 1st class mail Canada & Mexico must use 1st class rates other countries write first MC & Visa Accepted include numbers expiration date Expect 4 8 weeks delivery 1st issue address changes Submit free ad B&W photo $2 extra subscription orders Hobby Swap News Dept AR-3 PO Box 834 Santa Marta CA 93456 LOWERING THE COST OF HAVING FUN Safety Preston Continued page 12 batteries backwards zapping charger friend did case hooking up batteries charger caused red charg ing indicator light glow before power cord charger inserted wall outlet should have alerted him something amiss since light tell batteries indeed being charged think glows after unit plugged AC source Failure indi cator glow could mean plugged switched outlet didnt turn wall switch could mean blown fuse also might have left transmitter receiver switch thereby connecting batteries Tx Rx circuitry instead charger friend thinks son charger recently loaned may have reversed polarity output plug match different brand radio Whatever reason result defunct charger story somewhat different occurred least eight years ago purchased some wet cell Ni-Cds club auction use starting batteries automotive battery charger cumbersome equipped Variac pressed service charge up batteries Some time later another club auc tion purchased small plug-in-the-wall charger tl Brand X variety paper sticker marked 1 2V wanted charge 12-volt gel-cell field box worked perfectly some time came night error thinking tried charge two wet-cell starting Ni-Cds connected series using small 2V charger charger kind equipped indicator light covered amber lens lets know allis well its use guess light also serves fuse since isnt other fuse circuitry connected two starting Ni-Cds did appear indicator light somewhat brighter normal late night brain didnt register anything amiss some reason dont remember what occasion return workshop before turning night immediately apparent problem some kind since strong odor burning insulation glance charger took diagnose source since brown sticky substance exuding its bottom indicator light bulb didnt blow dont know Presumably though current too much forthe chargers transformer handle still below rating bulb chargers metal case too hot pull out wall socket protection rag hand often break out goose bumps think what might have happened handt made return trip workshop prior hitting sack Its possible might have ended up different author pages moral stories unless know what youre doing dont mess around electrical equipment now have decent VOM think must serious modeler Micronta Radio Shack brand Cat No 22-207A isnt cheap est model Radio Shack sale catalog arrived just yesterday has Micronta VOM No 22-204 plenty good enough other serious electroncis hobbyist its sale price $2488 have number cheaper models too periodically will go sale closing months column wed like thank responded request infor mation allergic reactions epoxy glues appeared March 1982 issue will talk about after have-run down some leads provided readers Mean have experienced allergic reac tion epoxy buy small fan work shop keep glue off hands Have safe month John Preston 7012 Elvira Ct Falls Church VA 22042 WRAM Show/Myers Continued page 16 prepared recommended Phase-In Plan protect use old sets long possible Frequency-Flag Plan get away foreign streamers weak pastels cant tell orange brown red and/or dirty yellow Logic dictates eventually transmitters receivers will have synthesizers fre quency-changing switches few bucks transmitter could have monitor receiver built before switching transmitter could switch monitor make sure no nearby using frequency wouldnt protect inter ference coming somewhere off field would keep shooting buddy down being shot down yourself transmitter left impound area could worked transmitter switch would have go through Monitor position get the Transmit position Being Transmit would disable monitor wouldnt driven nutty noise Something manufacturers think about havent already went WRAM Show ask question What willing say publication about companys response impending change RC channels As reporter think its job ask questions would ask bore until believe answer Thats what did answer Anyone selling European market ready narrow-band radio now Kraft Futaba Sanwa Circus Hob bies name few other folks either say walting things settle out told things confidence about what youd expect think will have pretty good selection narrow-band radios choose around Christmas concerned about consequences new situation John Maloney president World Engines has offered following state ment recent edition newsletter Scratchpad going make commit ment right now just single frequency conversion wanted will convert equipment right now new frequencies retail price crystals plus reasonable charge handling postage What else happened WRAM Show Two things important First District II meetingheld WRAM Show John Byrne presiding gentleman see Ed Whittens Jr Flight AMA News section suggested AMA club should adopt school vicinity Ithink its capital idea idea club pay membership AMA faculty member arts/crafts teacher coach audio/visual leader person will pick up ball run buy member ship get ModelAviation Chartered 92 Model Aviation
Edition: Model Aviation - 1982/06
Page Numbers: 10, 12, 92
S unwslirst WE START months column quoting edi trrial Ed Fitzwater m February issue ne DCRC Newsletter Its title same column Safety Comes First John Preston first started writing safety article Model Aviation magazine thought would last about three months die lack copy Boy wrong Funny thing thoughthe read Johns articles remembered about similar things happened around over years Safety has become big deal. should wouldnt want get hit planelet alone think about hitting being hit Pattern Giant Scale ple. think goes saying dont fly over people near misses have seen Yeah too can talk about safety. can talk about safety. until think act safe careful manner airplanes things day n will safe Most accidents can avoided really try things safe manner Please remember SAFETY IS ATTITUDE Fitz main reason used Eds editorial open months column can found first sentence Like Ed thought column would die lack material during first year Thanks readers have managed find something say 28 issues maga zine However morning sat down typewriter 29th time hard time coming up opening paragraph until remembered Eds DCRC Newsletter editorial Eds comments about wanting hit plane let alone bigger brings us letter recently received Publisher Carl Wheeley John Burdick New Paltz NY Johns letter complimented publisher quality magazine stating.. feel Model Aviation has grown immensely now best presents fine balance articles Among favorites have historical articles. technical articles. monthly columns ticles unconventional modeling nt turned page two Johns letter hoping see column speci fically listed favorites us like receive warm fuzzy once However page 2 began follows thing have disliked recently statement safety editor Giant models no dangerous smaller models since least death occurred small model struck spectator specious logic degrees hazard small model much less likely produce injuries striking person currently popular monsters feel demonstrably lethal weapons have always felt AMA should have taken much stronger stand regarding sensible size weight power limits large models once wrote article intended submit MA detailing discussion safety hazards strikes small large models Safety tips battery chargers John Preston standpoint ot physicist am sort comparative hazards Giant Scale Pattern models gave up found couldnt rewrite fast enough keep up facts time chose new upper limit horrible example picture would appear model magazines showing still bigger heavier powerful model still abomi nate things both because lethal potential because feel inviting stringent government regulation perhaps abolition Radio Control modeling So instead warm fuzzy hoping page 2 Johns letter gave us cold prickly instead So cant please people time column devoted safety lets look statement appeared column think caused John dislike writings must have following appeared March1980 issue MA Recent very Apparently believe result collision between -scaler human being would significantly worse collision involving aconventional-sized model personally dont think serves purpose discuss issue since model has sufficient energy cause death strikes vulnerable body part know case Europe 1 9-powered trainer caused death 6-year-old boy some reason loss control occurred What trying say statement wasthatyoucantbe killeddeaderthandead five- six-pound model has sufficient energy cause death should strike person should hazardous struck 50- 60-pound monster some degree agree John specious logic wing 6-lb model may strike back head cause minor injury same strike wing 60-lb model likely cause serious injury death could use physics engineering principles since happen engineer either prove disprove statement example what influences hazard dur ing collision Should use kinetic energy compare hazard big versus small models small model might shown just hazardous big Since kinetic energy varies square velocity could say since small models will very often fly higher velocities big ones must hazardous As alter native kinetic energy might argue Continued page 12 10 Model Aviation 0 -cc SURELY YOURE NOT GOING TO LET GO OF TWAT MONSTER WITHOUT WEARING n OC USSLUC Y LIICLU ur LUUCtUEI U UaOLUC aIU SLFSCLU U 4 Gal Case 24 Gal126 Gal NitroPer GalPer Gal 0%575525 5%650575 10%750675 12%800725 15%825775 25%10501000 40%15001400 60%24002300 54 Gal Drum EA 13500 20500 26500 29600 33000 46600 66800 105800 Prixex xbjext change ithe,t ,otic Free delivery 14525126 gal deals USA 30854 gal drums freight collect FOB Clover SC Gallon price determined nitro content 8 total quantity ordered SC orders add 4% sales tax Shipping & handling fee $500 per package less $400 cash purchases NEWPower Booster e eng $12/qt S38/gal freight mci Use 3 ozigai S -S 803222-7488 J kit contains ii metal instrument cases machinedTho TATONE engine test turned plated Glasses diet backs precisioncast alaminum Cut fit cases Also Included selection ol twentyie hold sit size typicat Instrument dial faces instnjcttonsrom /eA 80 KtT SIZESudes 4 oz tank eases fittings completely dia400I die578assembled Tank strap anc 1. dia400f die7 50mounting screws Included %dls500I die850 Idia500 1 dia950 JQnIy 1496 TT Teach Bird Sing introducing new A-47 AUTOMATIC HOMING BEEPER IL nois residenfs add 6% sa/es fax] PO Box 94787 riECTRONiCSSchaumburg1L60194 damage occurs during collision result force generated point impact higher force equals damage Since force function mass de celeration moving object could say big model collides something both mass deceleration will higher same collision involving small model Before write tell us weve flipped wig because deceleration small model will higher due its higher speed lets consider distance over two models brought halt Deceleration inversely proportional distance over velocity reduced zero distance equals less deceleration Since components big model likely rigid small model less likely collapse crush during impact will therefore produce higher force since must stop shorter distance Being hit wing will collapse during impact preferable being hit has high strength doesnt collapse Automobiles crushable front ends safer collisions rigid front ends whole principle behind energy-absorbing bumpers required Federal Government currently-manufac tured cars another factor might considered assessing hazard different types model aircraft probability being struck risk being criticized segment hobby let us say time have felt uncomfortable watching models flight Pylon Race model going get away its pilot wed rather itwere slow fast Cries ofI aint got infrequent average RC field weekend its slow model pilot aint got cry might provide sufficient warning bystanders get bead take cover necessary None discussion really proves thing regard safety big versus small models However before getting onto another topic would like have opinion recent change AMA Safety Code meeting November 7/8 1981 AMA Executive Council deleted 40-lb weight limit effect since July 1 1979 applied model covered AMA liability insurance policy would like know members feel about change ask drop us card letter stating opinion include major area interest hobby ie FF Rubber CL Combat RC Pattern etc get sufficient response request will pub lish results future column Battery chargers As sat down write column friend called tell us about just zapped chargers RC equipment also know fellow allegedly set fire house trying charge some Ni-Cds too high rate similar experience could have resulted few years back made error hooking up Ni-Cd starter pack charger cases errors correct procedure charging batteries will result damaged equipment However ii paycheck has shrunk terms its former buying power much Im sure youd rather have lay out bucks ney charger just because werent paying atten tion hooked up old part chargers accompany new RC system essentially foolproof Polarized plugs prevent hooking up charger Continued page 92 12 Model Aviation Oneor 5 Gal Can30 Gal Drum Gal Per Gal 105062510300 115069514200 125077518400 132582520400 140085022400 1850110030400 2500160042500 3000260065400 Photo s snown necossari p nose completed Kits P47 Military Scale $180 INCLUDES Top Flight P-47 kit Rhom retracts Aerosport 6 channel radio 5 servos Fox Eagle 60 engine J-3 CUB Quarter Scale $227 INCLUDESBud Nosen 1/4 scale J-3 Cub kit Kraft 4 channel radio rvos Quadra engine mount & props S212 Super Hustler engine SUPER KAOS Fast & Fun $185 INCLUDES Bridi Super Kaos kit Proline 5 channel radio 4 servos OX Max 60 engine $205 Rhom retracts items shown plus HUNDREDS others individually offered sale recent issues Hobby Swap News model en thusiasts Used Equipment Guide BuySell-Trade first ad tree 50 words max subscription $10/yr 10 issues $19/2yr. $27/3yr Add $3/yr 1st class mail Canada & Mexico must use 1st class rates other countries write first MC & Visa Accepted include numbers expiration date Expect 4 8 weeks delivery 1st issue address changes Submit free ad B&W photo $2 extra subscription orders Hobby Swap News Dept AR-3 PO Box 834 Santa Marta CA 93456 LOWERING THE COST OF HAVING FUN Safety Preston Continued page 12 batteries backwards zapping charger friend did case hooking up batteries charger caused red charg ing indicator light glow before power cord charger inserted wall outlet should have alerted him something amiss since light tell batteries indeed being charged think glows after unit plugged AC source Failure indi cator glow could mean plugged switched outlet didnt turn wall switch could mean blown fuse also might have left transmitter receiver switch thereby connecting batteries Tx Rx circuitry instead charger friend thinks son charger recently loaned may have reversed polarity output plug match different brand radio Whatever reason result defunct charger story somewhat different occurred least eight years ago purchased some wet cell Ni-Cds club auction use starting batteries automotive battery charger cumbersome equipped Variac pressed service charge up batteries Some time later another club auc tion purchased small plug-in-the-wall charger tl Brand X variety paper sticker marked 1 2V wanted charge 12-volt gel-cell field box worked perfectly some time came night error thinking tried charge two wet-cell starting Ni-Cds connected series using small 2V charger charger kind equipped indicator light covered amber lens lets know allis well its use guess light also serves fuse since isnt other fuse circuitry connected two starting Ni-Cds did appear indicator light somewhat brighter normal late night brain didnt register anything amiss some reason dont remember what occasion return workshop before turning night immediately apparent problem some kind since strong odor burning insulation glance charger took diagnose source since brown sticky substance exuding its bottom indicator light bulb didnt blow dont know Presumably though current too much forthe chargers transformer handle still below rating bulb chargers metal case too hot pull out wall socket protection rag hand often break out goose bumps think what might have happened handt made return trip workshop prior hitting sack Its possible might have ended up different author pages moral stories unless know what youre doing dont mess around electrical equipment now have decent VOM think must serious modeler Micronta Radio Shack brand Cat No 22-207A isnt cheap est model Radio Shack sale catalog arrived just yesterday has Micronta VOM No 22-204 plenty good enough other serious electroncis hobbyist its sale price $2488 have number cheaper models too periodically will go sale closing months column wed like thank responded request infor mation allergic reactions epoxy glues appeared March 1982 issue will talk about after have-run down some leads provided readers Mean have experienced allergic reac tion epoxy buy small fan work shop keep glue off hands Have safe month John Preston 7012 Elvira Ct Falls Church VA 22042 WRAM Show/Myers Continued page 16 prepared recommended Phase-In Plan protect use old sets long possible Frequency-Flag Plan get away foreign streamers weak pastels cant tell orange brown red and/or dirty yellow Logic dictates eventually transmitters receivers will have synthesizers fre quency-changing switches few bucks transmitter could have monitor receiver built before switching transmitter could switch monitor make sure no nearby using frequency wouldnt protect inter ference coming somewhere off field would keep shooting buddy down being shot down yourself transmitter left impound area could worked transmitter switch would have go through Monitor position get the Transmit position Being Transmit would disable monitor wouldnt driven nutty noise Something manufacturers think about havent already went WRAM Show ask question What willing say publication about companys response impending change RC channels As reporter think its job ask questions would ask bore until believe answer Thats what did answer Anyone selling European market ready narrow-band radio now Kraft Futaba Sanwa Circus Hob bies name few other folks either say walting things settle out told things confidence about what youd expect think will have pretty good selection narrow-band radios choose around Christmas concerned about consequences new situation John Maloney president World Engines has offered following state ment recent edition newsletter Scratchpad going make commit ment right now just single frequency conversion wanted will convert equipment right now new frequencies retail price crystals plus reasonable charge handling postage What else happened WRAM Show Two things important First District II meetingheld WRAM Show John Byrne presiding gentleman see Ed Whittens Jr Flight AMA News section suggested AMA club should adopt school vicinity Ithink its capital idea idea club pay membership AMA faculty member arts/crafts teacher coach audio/visual leader person will pick up ball run buy member ship get ModelAviation Chartered 92 Model Aviation
