___John Preston___________________________ Safety Comes First Lead/acid batter ies can explode Model restrain ing devices Al low models over 55 lb AMA events EXPLODING BAITERIES Im sure aware jump-starting dead automobile battery possibility explosion can occur During last month re ceived letter Mitch Poling column safety written Model Builder magazine enclosed Mitchs column illustrates lead/acid batteries us use pursuit hobby may also present same hazard Excerpts Mitchs MB column Electric Power February 87 issue follows read JoIm Onians Offshore column November 1986 Model Airplane News about very bad charging accident Usually dont men tion safety other use fuses deserves some extra attention am doing because have strong feeling grace God go Mel Schmidt well-known Free Flight charging starting battery lead/acid battery Gas planes checked charger connection jiggling connector saw some sparks fly clip next thing knew hospital blind both eyes Since eye has recovered other damaged beyond repair battery fragments lead/acid battery exploded violently sounded like bomb Only some plates part bottom casing remained lead/acid battery generates hydrogen gas under charge violently explosive sparks no-no However time get away once awhile some comes up unlucky number Several years ago recall brochure 4 hi lii K IT TIME WE TAKE CLOSE LCOk AT OTI-IE RES-IVAINU4cV tEV ICES ished Shell Oil Co contained safety tips motorists tips addressed correct procedure connecting jumper cables between good dead car battery As best recall brochure said first con nect positive terminals two batteries jumper cable attach second cable negative terminal good battery make final connection negative cable some grounded part car away dead battery make final connection negative pole dead battery cause make final connection will sudden flow current will almost inevi tably result spark before achieve secure connection After starting car dead battery disconnection jumper cables should made reverse order connection So much starting dead car batteries Back Mitchs MB column use lead/acid batteries lot charge nickel-cadmium packs have seen lot sparks fly years Electric flying since 1972 have lucky know what hydrogen explosion like small hydrogen gas generator once blew up next because own carelessness Again lucky latest close call basement using six-amp charger charge 30-amphour lawnmower battery use shop charg ing connected Ni-Cd charger Ni-Cd connected sparks flew bat tery bubbling gas might very well have Continued page 16 14 Model Aviation Model-restraining device constructed plastIc water pipe fittings Otto Walin ski info columnIncluding order yourself Keith Wilsons device serves double duty restrains model its being transported family car also its being started flying field WE DenBeste used 1/2-in birch piywood model-restraining device folds storage transportation Note copy AMA Safety Code nearest upright piece IRON. WITh ROLL-BARSI 1% Blackatone coating slides like buffer almost no adhesive buildup /- HI-Tech 50 vthermostat solves bubble m9lster5f new Black Baron Iron designed specif icafly model airplanes photographers shoe manufacturers exdusive roll bars fit fillets & undercambers flat sole sheeted & open structures its bevelled edges provide constant heat marks toe rounded & flat turned up toes cute counter productive coating 100% Black stone big improvement over less expensive coatings slides like butter over tacky surfaces almost no adhesive buildup An advanced Hi-Tech thermostat reduces temperature drift 50 Ordinary irons vary up 400 No wonder get bubbles cant explain See dealer ask new Black Baron Iron ____ hes out stock patient iron hand made individually checked accuracy comes qual ity Coverite always striving something JL CGVERflE 420 Babylon Rd Horsham PA1 19044 DAVE RORELENS Parke eti Outstanding small field performance novice & expert alike om airfoils top performance quality balsa plywood gned 3 channels Precision machine-cut balsa plywood 5995 Playmate 3 ch 50 sportfun fly 1 5-25 2 4 cycle fast assembly hand-cut kit$4995 Pronto 50 span 15-252 4 cycle 3 ch. hand-cut kit easily converted dec excellent beginner also challenges expert $3995 Windbreaker 50 span 20-25 2 4 cycle 4 ch aerobatic docile 6-5 hr rapid-fire assembly preci sion pre-cut balsa & ply wood complete hardware package mci capable complete AMA pattern $4995 Available dealer order dIrect 4L Add $2 shipping additional $2 COD Save COD send check money order WATER HOBBY ENTERPRISES 26 Sapphire Run Ocala FL 32672 5 687-2160 904-245-4653 next statistic Nothing happenedI lucky again Ive decided quit pushing luck some rules Im starting use right now recommend 1 Connect lead/acid battery charger battery want charge before plug charger AC supply other waythat charger already plugged AC supply connect charger output batterysparks will fly make con nection done charging unplug charger AC supply first should unclip charged lead acid battery charger charging oper ation generates lot hydrogen charged battery will probably bubbling think step disconnect battery charger dangerous Dont unclip charger until AC plug pulled 2 Never use lead/acid battery charge Ni-Cdt AC charger itself may producing gas inevitably sparks will occur charging Ni-Cds use lead/acid battery under charge advice doesnt apply does because have habit using charging battery leveling devicein effect using AC charger run Ni-Cd charger gives nice high-power charge Someday might really high-power charge have discontinued practice Ive lucky 3 Never connect Ni-Cd charger charge battery Ni-Cd pack plugged will cause heavy spark charger turned off Connect Ni-Cd charger charge battery first plug Ni-Cd pack Ni-Cd pack charged make sure charger turned off unplug Ni-Cd pack After can disconnect Ni-Cd charger charger battery before '4 using charger inverterthat boosts voltage seven cells can chargedbe very careful An inverter draws very high initial current no Ni-Cd pack connected may cause spark will much safer set up charger battery power cable booster charger can plug cable sparks farther away charge battery Use heavy-duty wire 14-gauge heavier 5 Use sealed lead/acid batteries much possible produce very little hydrogen gas Gel cells Gates cells made GE type writing months Safety column received second letter Mitch Poling described incident illustrates advocate fuses motor/battery circuit electric-powered models stated following reason among recommend fuses serious fire hazard shorted Ni-Cd pack presents currents can go well over 30 amps have plane burn up did have fuse heard problems similar until last week Howard Lazerson wrote tell about plane burned too did have fuse used bare spade lugs connect fuse plastic type spade con nectors type recommend crash flame Southern California such fire can result serious brushfire So Howard some fast work to put out fortunately able Howard using insulated spade lugs uninsulated ones Continued page 22 16Model Aviation INTRODUCING THE BLACK BARON / Exclusive roll-bars roil filets & undercambers BoTrou BONUSIII Two stands includ iuaj WEattaches iron STAND so los dont have look e span Lo engines POSI CURETM CYANOACRYLATE • ISI U J 1 [61 I1E1S lie] SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec495 Savings 50% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec$2950% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS 2135 Old Oakland Rd Jose CA FOR ORDERS ONLY PLEASt 80022832376 800 822-1688 Out StateIn California INFO 408 943-0872 Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 pushed together crash circumvented fuse always wrap spade connectors tape see now bare spade connectors rare item Most sold auto parts stores insulateda good thing way both ards plane 020-size four-cell packs Considering motor packs larger fire hazard shorted pack gets serious Pay attention insulation watch out shorting possibilities Thank Mitch sharing above safety tips readers Model Aviation well Mode Builder subject electric power Im going add third tip own Always discon nect motor battery model use Unlike fuel-powered model requires very deliberate series operations start motor Electric will spring life flick switch Just because Electrocs quiet doesnt mean props have less chewing ability equivalent-size fuel-powered model suppose manufacturers household electric fans put guards around blades Cer tainly improve appearance Model restraining devices subject prop-chewing incidents since column published pictures Jim Newmans Aus terized Telemaster during starting Jim uses wheel chocks Ive received number letters describe methods secure models starting ground-running engine An example such device fabricated PVC ABS water pipe fittings sent Otto Walinski owns Hobby Center Abilene TX As can seen accompanying photo graph Ottos device calls Face Saver secures model its stabilizer turn secured ground means metal spike passing through eyebolt vertical padded yoke unplugs release model may replugged parallel horizontal yoke convenient stowage transporting flying site Otto cautions others wish make such device should copied exactly $1495 plus postage willing supply device anyone wants interested write Janco 1175 N 2nd St Abilene TX 79601 Im also including photographs two other designs model-restraining devices submitted W E DenBeste Keith Wilson As Keith noted accompanying letter design such can also used secure model back family station wagon driving flying field dont already use some type restraining device secure model starting adjusting engine suggest consider other illustrated designs Model weight limit revisited Much has previously published column other columns modeling press concerning weight restriction 55 lb model aircraft stipulated paragraph five General section AMA Safety Code Mail received during last month informs move afoot persuade AMA Executive Council remove weight limit models built and/or flown according certain suggested plans appears plans have formulated because stifle growth experimenta tion radio-controlled aircraft now would like turning switch off projector finest Continued page 123 L sa mrrorI8o per order FAST SERVICE COD ADD $190 CIIVELANDS GI IS bondA WFOR R/C4UFFS hdlB4ip PoWyp No01. Wood end FeboIC Rofjo B4Mro Us T&o5b,oJoI Yo. Newt HietooiooIIy Pe.ntedl 87 Corn JN4 Jenny $37 61 OH Moqoito Bb $4 BA Fokko 07 FIr $39 108 DH MoqoBook $55 70 Boyle Ono-So $32 98 Stoor FT17Koydt $5 60 Howord Polo Boo $32 99 FIBIk Widow P61 $6 60 Sop. soon. S6B S34 71 Doog DC3 C47 $35-* 89 Soponoorino S6B $35 95 Doog [23 C47 $5 63 Con Howk P68 $42 86 Howko Tooooo 13 $3 94 Cort Howk P68 S54 64 Stoot SkyCo, $1 74 Doolioio G-B $48 72 Cor02$t /4 L&5 $4 95 Monoooopo Spool $36 108 Cor 0251/4 L&$ $5 00 808 Op Boiidog $43 60 Doogioo lo2 Moii $3 107 Aoronoo C3 Opt $3568 Oriotoi Boiidog Fir $3 62 Howord Boo ike $48 59 8ron8ooo MoLA $5 78 Tornor WW Boo $35 107 Grow 80001 P89 $5 63Cor GoIl FliC 542 69LindkorgoNX2ii $2 94 Cor CookI Ft 1C 85491 Liodkorg NX31 1 $3 66 Ool4oo Coorot Boo $24 96 WrNWlNov Roo $4 62 HowMrMoiiigoo $35 74 C Hoildor SB2C-4 $5 94 HosMrMotiigoo $45 108 FoirolrPT19 Yr $5 63 Booiog P-26A Ptr $36 60 Wooo Topor-Wing $3 84 Boolog P-26A FIr $48 98 Wooo Topor-Wiog $4 69 Woo0 C6 Cgkin $36 75 Wonlid Lyooodor $3 64 Boool Ct7-B Slog $38 100 Woold Lyooodor $4 96 Boool C17-B Slog 549 57 Ford Triorr 4-Al $3 55 Look ii Bleotro $38 76 Ford Trirolr 4AT $4 83 Look 11 Binolro $40 114 Food Trio 4-AT $65 62 Sinoo, T/W 087 $10 96 Boilooco Ainorolo $4 81 Stinoon nW $87 $26 93 Loonlng C2Anpk $6 123 Stioooo TIW 387 $38- 58 Grow J3F Dock $3 59 Molot FIr P28 $20 78 Grow J2-F Doot $5 118 Briloi FIr P288 $45 124 Look Air Eoproo-$4 74 Toroon Foooo $45 62 Look Air Boproto $ 56 Cc Workk P40 $24 83 Look Air Eopoooo $3 60 VogI Corooir P45 $35 77 WWw 131 BodL $480 80 vog Corsoir F4$ $69 63 C Sookowk F7C-t $4 78 Look Ligklog 9-38 $38 96 C Sookonok F7Ct $5 26 RopSow-Bo Aw 024 108 Sikor 0-38 Awpk $4 74 BopOoo-Bo Aw $39 60 Booing 100 Sport $3 70 Fipor J3 Cok$29 90 Booing 100 Sport $4 106 Piper J3 Cob83972 NortkropGowwo $4 98Look ttodsoo Bwk $38 96 Nortkroe Gowwo $7 63 Grow F6F Heitoot $28 90 OtinA Low 3/M $56 * 77 Booing 8170 Fort $35 60 S9nA Low 3/W 84 103 Boo 8170 Fort $55 120 StinoA Low 3/M $8 68 Wood Wklriwind $32 78 CoooiCotP8VSA 04 68 N Awor Novion $39 104 ConCotPBYSA $5 68 BBononeo V-Toil $29 65 MCkino Cii. $6 77 Loooowko Sodon $25 97 loCkino Ciippor $7 72 NA 8-25 Bowkor $49 62 Cortlo NC4 $5 65 MMoroodor 8-26 $49 94 Cortioo NC4 $6 AflON POICE OOICATo 00*0100 OtOO 01*01 PLAN Ovor 1200 Olkor 6 7S Au Potto looi SOc $p Add 10% oil ordors okipping & ioo. eto $$A Con & Moo Eioowkoro 15% Z25 olo Pioloriol oooolog $2$$ linotodo Polo LiotI Prioo II bootico i0 $100 oir loroigo odd $100 LEVELANDMODEL&SUPPLYCo LOwome 1 cOocaeAOcOOe-S oar wooBlooe lO309B8TBO4T AVI CLBVBLAND OHIO 4410t OtrooOoooo i 5Osool 50wti 22 Model Aviation Sat ety/ Preston Continued page 22 movie have ever seen never able view outcome movie has also stated put cap RCs safest area sport Giant Scale would tragedy Rather get soapbox give opinion whether current weight limit stifling growth experimentation Id like seek opinion readers subject Specif ically would like comments fol lowing two plans have submitted AMA VP may discussed AMA Executive Council upcoming meeting Plan #1 Remove existing 55-lb weight limit allow size RC aircraft flown providing A The aircraft non-man-carrying B The aircraft meets safety requirements C The aircraft has flown least six 12 times prior presentation D The model flown demonstration means no other aircraft will flown model being demon strated E The model will flown accordance what its full-scale counterpart able perform no would aerobatics 200-lb C-130 Plan #2 Keep existing 55-lb weight limit force create Experimental category FAA has category am certain EAA would hardly exist category RC models non-man-carrying type would fall Experimental category would subject certain regulations much like above restrictions A No weight limit B Non-man-carrying C No engine size limitations However IMAA would determine what minimum en gine sizes might recommended Under powered aircraft have proven danger ous under certain conditions D Twelve prior proven airworthy flights before model could demonstrated AMAIIMAA-sanctioned event E Model must pass safety inspection sanc tioned events meet safety standards equipment installation IMAA presently working updated version its present safety guidelines safety inspectors handbook will available 1987 reader would like copy present 1986 prior IMAA safety guidelines please drop line address end column include SASE Note new address moved end 1986 Rock ville MD Washington DC time column appears print have received IMAAs updated 1987 version safety guide lines will send recent version take time send opinion also take time send copy AMA VP has vote AMA Execu tive Council matters Have safe month John Preston 2812 Northampton St N W Washington DC 20015 e Register NOW. 87 NATS *SITE FEATURES.. Ample parking On-site Hobby Shop Frequency Analyser Single Site convenien/ Hotel/Motel accommodation S 0 Arnprior Summer Carnival Competitors INFOPAK now availablewrite yours today.. Canadian NATS 87 PO Box 5477 Postal StnF Ottawa Ont K2C 3M1 L April 1987123 *CLOSE TO.. ALOG $750 Deducted 1st order over $2500 2.*USA ~ *JAPAN Mi1hJhU ./OlbliYILI LU1 t RHANY responding advertisers mention thatyou read about MadelAvlatlon 1000s choose Solar rubber povered gliders copters scale lasercut diecut youcut rockets origami some vith ving span 6 feetl ALL MADE OUT OF PAPER Limited number printed i8i88A23455PAPER AIRPLANES INTERNATIONALI 213822-9185 1521 Morningslde Drive Burbank California91506USA
Edition: Model Aviation - 1987/04
Page Numbers: 14, 16, 22, 123
___John Preston___________________________ Safety Comes First Lead/acid batter ies can explode Model restrain ing devices Al low models over 55 lb AMA events EXPLODING BAITERIES Im sure aware jump-starting dead automobile battery possibility explosion can occur During last month re ceived letter Mitch Poling column safety written Model Builder magazine enclosed Mitchs column illustrates lead/acid batteries us use pursuit hobby may also present same hazard Excerpts Mitchs MB column Electric Power February 87 issue follows read JoIm Onians Offshore column November 1986 Model Airplane News about very bad charging accident Usually dont men tion safety other use fuses deserves some extra attention am doing because have strong feeling grace God go Mel Schmidt well-known Free Flight charging starting battery lead/acid battery Gas planes checked charger connection jiggling connector saw some sparks fly clip next thing knew hospital blind both eyes Since eye has recovered other damaged beyond repair battery fragments lead/acid battery exploded violently sounded like bomb Only some plates part bottom casing remained lead/acid battery generates hydrogen gas under charge violently explosive sparks no-no However time get away once awhile some comes up unlucky number Several years ago recall brochure 4 hi lii K IT TIME WE TAKE CLOSE LCOk AT OTI-IE RES-IVAINU4cV tEV ICES ished Shell Oil Co contained safety tips motorists tips addressed correct procedure connecting jumper cables between good dead car battery As best recall brochure said first con nect positive terminals two batteries jumper cable attach second cable negative terminal good battery make final connection negative cable some grounded part car away dead battery make final connection negative pole dead battery cause make final connection will sudden flow current will almost inevi tably result spark before achieve secure connection After starting car dead battery disconnection jumper cables should made reverse order connection So much starting dead car batteries Back Mitchs MB column use lead/acid batteries lot charge nickel-cadmium packs have seen lot sparks fly years Electric flying since 1972 have lucky know what hydrogen explosion like small hydrogen gas generator once blew up next because own carelessness Again lucky latest close call basement using six-amp charger charge 30-amphour lawnmower battery use shop charg ing connected Ni-Cd charger Ni-Cd connected sparks flew bat tery bubbling gas might very well have Continued page 16 14 Model Aviation Model-restraining device constructed plastIc water pipe fittings Otto Walin ski info columnIncluding order yourself Keith Wilsons device serves double duty restrains model its being transported family car also its being started flying field WE DenBeste used 1/2-in birch piywood model-restraining device folds storage transportation Note copy AMA Safety Code nearest upright piece IRON. WITh ROLL-BARSI 1% Blackatone coating slides like buffer almost no adhesive buildup /- HI-Tech 50 vthermostat solves bubble m9lster5f new Black Baron Iron designed specif icafly model airplanes photographers shoe manufacturers exdusive roll bars fit fillets & undercambers flat sole sheeted & open structures its bevelled edges provide constant heat marks toe rounded & flat turned up toes cute counter productive coating 100% Black stone big improvement over less expensive coatings slides like butter over tacky surfaces almost no adhesive buildup An advanced Hi-Tech thermostat reduces temperature drift 50 Ordinary irons vary up 400 No wonder get bubbles cant explain See dealer ask new Black Baron Iron ____ hes out stock patient iron hand made individually checked accuracy comes qual ity Coverite always striving something JL CGVERflE 420 Babylon Rd Horsham PA1 19044 DAVE RORELENS Parke eti Outstanding small field performance novice & expert alike om airfoils top performance quality balsa plywood gned 3 channels Precision machine-cut balsa plywood 5995 Playmate 3 ch 50 sportfun fly 1 5-25 2 4 cycle fast assembly hand-cut kit$4995 Pronto 50 span 15-252 4 cycle 3 ch. hand-cut kit easily converted dec excellent beginner also challenges expert $3995 Windbreaker 50 span 20-25 2 4 cycle 4 ch aerobatic docile 6-5 hr rapid-fire assembly preci sion pre-cut balsa & ply wood complete hardware package mci capable complete AMA pattern $4995 Available dealer order dIrect 4L Add $2 shipping additional $2 COD Save COD send check money order WATER HOBBY ENTERPRISES 26 Sapphire Run Ocala FL 32672 5 687-2160 904-245-4653 next statistic Nothing happenedI lucky again Ive decided quit pushing luck some rules Im starting use right now recommend 1 Connect lead/acid battery charger battery want charge before plug charger AC supply other waythat charger already plugged AC supply connect charger output batterysparks will fly make con nection done charging unplug charger AC supply first should unclip charged lead acid battery charger charging oper ation generates lot hydrogen charged battery will probably bubbling think step disconnect battery charger dangerous Dont unclip charger until AC plug pulled 2 Never use lead/acid battery charge Ni-Cdt AC charger itself may producing gas inevitably sparks will occur charging Ni-Cds use lead/acid battery under charge advice doesnt apply does because have habit using charging battery leveling devicein effect using AC charger run Ni-Cd charger gives nice high-power charge Someday might really high-power charge have discontinued practice Ive lucky 3 Never connect Ni-Cd charger charge battery Ni-Cd pack plugged will cause heavy spark charger turned off Connect Ni-Cd charger charge battery first plug Ni-Cd pack Ni-Cd pack charged make sure charger turned off unplug Ni-Cd pack After can disconnect Ni-Cd charger charger battery before '4 using charger inverterthat boosts voltage seven cells can chargedbe very careful An inverter draws very high initial current no Ni-Cd pack connected may cause spark will much safer set up charger battery power cable booster charger can plug cable sparks farther away charge battery Use heavy-duty wire 14-gauge heavier 5 Use sealed lead/acid batteries much possible produce very little hydrogen gas Gel cells Gates cells made GE type writing months Safety column received second letter Mitch Poling described incident illustrates advocate fuses motor/battery circuit electric-powered models stated following reason among recommend fuses serious fire hazard shorted Ni-Cd pack presents currents can go well over 30 amps have plane burn up did have fuse heard problems similar until last week Howard Lazerson wrote tell about plane burned too did have fuse used bare spade lugs connect fuse plastic type spade con nectors type recommend crash flame Southern California such fire can result serious brushfire So Howard some fast work to put out fortunately able Howard using insulated spade lugs uninsulated ones Continued page 22 16Model Aviation INTRODUCING THE BLACK BARON / Exclusive roll-bars roil filets & undercambers BoTrou BONUSIII Two stands includ iuaj WEattaches iron STAND so los dont have look e span Lo engines POSI CURETM CYANOACRYLATE • ISI U J 1 [61 I1E1S lie] SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec495 Savings 50% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec$2950% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS 2135 Old Oakland Rd Jose CA FOR ORDERS ONLY PLEASt 80022832376 800 822-1688 Out StateIn California INFO 408 943-0872 Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 pushed together crash circumvented fuse always wrap spade connectors tape see now bare spade connectors rare item Most sold auto parts stores insulateda good thing way both ards plane 020-size four-cell packs Considering motor packs larger fire hazard shorted pack gets serious Pay attention insulation watch out shorting possibilities Thank Mitch sharing above safety tips readers Model Aviation well Mode Builder subject electric power Im going add third tip own Always discon nect motor battery model use Unlike fuel-powered model requires very deliberate series operations start motor Electric will spring life flick switch Just because Electrocs quiet doesnt mean props have less chewing ability equivalent-size fuel-powered model suppose manufacturers household electric fans put guards around blades Cer tainly improve appearance Model restraining devices subject prop-chewing incidents since column published pictures Jim Newmans Aus terized Telemaster during starting Jim uses wheel chocks Ive received number letters describe methods secure models starting ground-running engine An example such device fabricated PVC ABS water pipe fittings sent Otto Walinski owns Hobby Center Abilene TX As can seen accompanying photo graph Ottos device calls Face Saver secures model its stabilizer turn secured ground means metal spike passing through eyebolt vertical padded yoke unplugs release model may replugged parallel horizontal yoke convenient stowage transporting flying site Otto cautions others wish make such device should copied exactly $1495 plus postage willing supply device anyone wants interested write Janco 1175 N 2nd St Abilene TX 79601 Im also including photographs two other designs model-restraining devices submitted W E DenBeste Keith Wilson As Keith noted accompanying letter design such can also used secure model back family station wagon driving flying field dont already use some type restraining device secure model starting adjusting engine suggest consider other illustrated designs Model weight limit revisited Much has previously published column other columns modeling press concerning weight restriction 55 lb model aircraft stipulated paragraph five General section AMA Safety Code Mail received during last month informs move afoot persuade AMA Executive Council remove weight limit models built and/or flown according certain suggested plans appears plans have formulated because stifle growth experimenta tion radio-controlled aircraft now would like turning switch off projector finest Continued page 123 L sa mrrorI8o per order FAST SERVICE COD ADD $190 CIIVELANDS GI IS bondA WFOR R/C4UFFS hdlB4ip PoWyp No01. Wood end FeboIC Rofjo B4Mro Us T&o5b,oJoI Yo. Newt HietooiooIIy Pe.ntedl 87 Corn JN4 Jenny $37 61 OH Moqoito Bb $4 BA Fokko 07 FIr $39 108 DH MoqoBook $55 70 Boyle Ono-So $32 98 Stoor FT17Koydt $5 60 Howord Polo Boo $32 99 FIBIk Widow P61 $6 60 Sop. soon. S6B S34 71 Doog DC3 C47 $35-* 89 Soponoorino S6B $35 95 Doog [23 C47 $5 63 Con Howk P68 $42 86 Howko Tooooo 13 $3 94 Cort Howk P68 S54 64 Stoot SkyCo, $1 74 Doolioio G-B $48 72 Cor02$t /4 L&5 $4 95 Monoooopo Spool $36 108 Cor 0251/4 L&$ $5 00 808 Op Boiidog $43 60 Doogioo lo2 Moii $3 107 Aoronoo C3 Opt $3568 Oriotoi Boiidog Fir $3 62 Howord Boo ike $48 59 8ron8ooo MoLA $5 78 Tornor WW Boo $35 107 Grow 80001 P89 $5 63Cor GoIl FliC 542 69LindkorgoNX2ii $2 94 Cor CookI Ft 1C 85491 Liodkorg NX31 1 $3 66 Ool4oo Coorot Boo $24 96 WrNWlNov Roo $4 62 HowMrMoiiigoo $35 74 C Hoildor SB2C-4 $5 94 HosMrMotiigoo $45 108 FoirolrPT19 Yr $5 63 Booiog P-26A Ptr $36 60 Wooo Topor-Wing $3 84 Boolog P-26A FIr $48 98 Wooo Topor-Wiog $4 69 Woo0 C6 Cgkin $36 75 Wonlid Lyooodor $3 64 Boool Ct7-B Slog $38 100 Woold Lyooodor $4 96 Boool C17-B Slog 549 57 Ford Triorr 4-Al $3 55 Look ii Bleotro $38 76 Ford Trirolr 4AT $4 83 Look 11 Binolro $40 114 Food Trio 4-AT $65 62 Sinoo, T/W 087 $10 96 Boilooco Ainorolo $4 81 Stinoon nW $87 $26 93 Loonlng C2Anpk $6 123 Stioooo TIW 387 $38- 58 Grow J3F Dock $3 59 Molot FIr P28 $20 78 Grow J2-F Doot $5 118 Briloi FIr P288 $45 124 Look Air Eoproo-$4 74 Toroon Foooo $45 62 Look Air Boproto $ 56 Cc Workk P40 $24 83 Look Air Eopoooo $3 60 VogI Corooir P45 $35 77 WWw 131 BodL $480 80 vog Corsoir F4$ $69 63 C Sookowk F7C-t $4 78 Look Ligklog 9-38 $38 96 C Sookonok F7Ct $5 26 RopSow-Bo Aw 024 108 Sikor 0-38 Awpk $4 74 BopOoo-Bo Aw $39 60 Booing 100 Sport $3 70 Fipor J3 Cok$29 90 Booing 100 Sport $4 106 Piper J3 Cob83972 NortkropGowwo $4 98Look ttodsoo Bwk $38 96 Nortkroe Gowwo $7 63 Grow F6F Heitoot $28 90 OtinA Low 3/M $56 * 77 Booing 8170 Fort $35 60 S9nA Low 3/W 84 103 Boo 8170 Fort $55 120 StinoA Low 3/M $8 68 Wood Wklriwind $32 78 CoooiCotP8VSA 04 68 N Awor Novion $39 104 ConCotPBYSA $5 68 BBononeo V-Toil $29 65 MCkino Cii. $6 77 Loooowko Sodon $25 97 loCkino Ciippor $7 72 NA 8-25 Bowkor $49 62 Cortlo NC4 $5 65 MMoroodor 8-26 $49 94 Cortioo NC4 $6 AflON POICE OOICATo 00*0100 OtOO 01*01 PLAN Ovor 1200 Olkor 6 7S Au Potto looi SOc $p Add 10% oil ordors okipping & ioo. eto $$A Con & Moo Eioowkoro 15% Z25 olo Pioloriol oooolog $2$$ linotodo Polo LiotI Prioo II bootico i0 $100 oir loroigo odd $100 LEVELANDMODEL&SUPPLYCo LOwome 1 cOocaeAOcOOe-S oar wooBlooe lO309B8TBO4T AVI CLBVBLAND OHIO 4410t OtrooOoooo i 5Osool 50wti 22 Model Aviation Sat ety/ Preston Continued page 22 movie have ever seen never able view outcome movie has also stated put cap RCs safest area sport Giant Scale would tragedy Rather get soapbox give opinion whether current weight limit stifling growth experimentation Id like seek opinion readers subject Specif ically would like comments fol lowing two plans have submitted AMA VP may discussed AMA Executive Council upcoming meeting Plan #1 Remove existing 55-lb weight limit allow size RC aircraft flown providing A The aircraft non-man-carrying B The aircraft meets safety requirements C The aircraft has flown least six 12 times prior presentation D The model flown demonstration means no other aircraft will flown model being demon strated E The model will flown accordance what its full-scale counterpart able perform no would aerobatics 200-lb C-130 Plan #2 Keep existing 55-lb weight limit force create Experimental category FAA has category am certain EAA would hardly exist category RC models non-man-carrying type would fall Experimental category would subject certain regulations much like above restrictions A No weight limit B Non-man-carrying C No engine size limitations However IMAA would determine what minimum en gine sizes might recommended Under powered aircraft have proven danger ous under certain conditions D Twelve prior proven airworthy flights before model could demonstrated AMAIIMAA-sanctioned event E Model must pass safety inspection sanc tioned events meet safety standards equipment installation IMAA presently working updated version its present safety guidelines safety inspectors handbook will available 1987 reader would like copy present 1986 prior IMAA safety guidelines please drop line address end column include SASE Note new address moved end 1986 Rock ville MD Washington DC time column appears print have received IMAAs updated 1987 version safety guide lines will send recent version take time send opinion also take time send copy AMA VP has vote AMA Execu tive Council matters Have safe month John Preston 2812 Northampton St N W Washington DC 20015 e Register NOW. 87 NATS *SITE FEATURES.. Ample parking On-site Hobby Shop Frequency Analyser Single Site convenien/ Hotel/Motel accommodation S 0 Arnprior Summer Carnival Competitors INFOPAK now availablewrite yours today.. Canadian NATS 87 PO Box 5477 Postal StnF Ottawa Ont K2C 3M1 L April 1987123 *CLOSE TO.. ALOG $750 Deducted 1st order over $2500 2.*USA ~ *JAPAN Mi1hJhU ./OlbliYILI LU1 t RHANY responding advertisers mention thatyou read about MadelAvlatlon 1000s choose Solar rubber povered gliders copters scale lasercut diecut youcut rockets origami some vith ving span 6 feetl ALL MADE OUT OF PAPER Limited number printed i8i88A23455PAPER AIRPLANES INTERNATIONALI 213822-9185 1521 Morningslde Drive Burbank California91506USA
Edition: Model Aviation - 1987/04
Page Numbers: 14, 16, 22, 123
___John Preston___________________________ Safety Comes First Lead/acid batter ies can explode Model restrain ing devices Al low models over 55 lb AMA events EXPLODING BAITERIES Im sure aware jump-starting dead automobile battery possibility explosion can occur During last month re ceived letter Mitch Poling column safety written Model Builder magazine enclosed Mitchs column illustrates lead/acid batteries us use pursuit hobby may also present same hazard Excerpts Mitchs MB column Electric Power February 87 issue follows read JoIm Onians Offshore column November 1986 Model Airplane News about very bad charging accident Usually dont men tion safety other use fuses deserves some extra attention am doing because have strong feeling grace God go Mel Schmidt well-known Free Flight charging starting battery lead/acid battery Gas planes checked charger connection jiggling connector saw some sparks fly clip next thing knew hospital blind both eyes Since eye has recovered other damaged beyond repair battery fragments lead/acid battery exploded violently sounded like bomb Only some plates part bottom casing remained lead/acid battery generates hydrogen gas under charge violently explosive sparks no-no However time get away once awhile some comes up unlucky number Several years ago recall brochure 4 hi lii K IT TIME WE TAKE CLOSE LCOk AT OTI-IE RES-IVAINU4cV tEV ICES ished Shell Oil Co contained safety tips motorists tips addressed correct procedure connecting jumper cables between good dead car battery As best recall brochure said first con nect positive terminals two batteries jumper cable attach second cable negative terminal good battery make final connection negative cable some grounded part car away dead battery make final connection negative pole dead battery cause make final connection will sudden flow current will almost inevi tably result spark before achieve secure connection After starting car dead battery disconnection jumper cables should made reverse order connection So much starting dead car batteries Back Mitchs MB column use lead/acid batteries lot charge nickel-cadmium packs have seen lot sparks fly years Electric flying since 1972 have lucky know what hydrogen explosion like small hydrogen gas generator once blew up next because own carelessness Again lucky latest close call basement using six-amp charger charge 30-amphour lawnmower battery use shop charg ing connected Ni-Cd charger Ni-Cd connected sparks flew bat tery bubbling gas might very well have Continued page 16 14 Model Aviation Model-restraining device constructed plastIc water pipe fittings Otto Walin ski info columnIncluding order yourself Keith Wilsons device serves double duty restrains model its being transported family car also its being started flying field WE DenBeste used 1/2-in birch piywood model-restraining device folds storage transportation Note copy AMA Safety Code nearest upright piece IRON. WITh ROLL-BARSI 1% Blackatone coating slides like buffer almost no adhesive buildup /- HI-Tech 50 vthermostat solves bubble m9lster5f new Black Baron Iron designed specif icafly model airplanes photographers shoe manufacturers exdusive roll bars fit fillets & undercambers flat sole sheeted & open structures its bevelled edges provide constant heat marks toe rounded & flat turned up toes cute counter productive coating 100% Black stone big improvement over less expensive coatings slides like butter over tacky surfaces almost no adhesive buildup An advanced Hi-Tech thermostat reduces temperature drift 50 Ordinary irons vary up 400 No wonder get bubbles cant explain See dealer ask new Black Baron Iron ____ hes out stock patient iron hand made individually checked accuracy comes qual ity Coverite always striving something JL CGVERflE 420 Babylon Rd Horsham PA1 19044 DAVE RORELENS Parke eti Outstanding small field performance novice & expert alike om airfoils top performance quality balsa plywood gned 3 channels Precision machine-cut balsa plywood 5995 Playmate 3 ch 50 sportfun fly 1 5-25 2 4 cycle fast assembly hand-cut kit$4995 Pronto 50 span 15-252 4 cycle 3 ch. hand-cut kit easily converted dec excellent beginner also challenges expert $3995 Windbreaker 50 span 20-25 2 4 cycle 4 ch aerobatic docile 6-5 hr rapid-fire assembly preci sion pre-cut balsa & ply wood complete hardware package mci capable complete AMA pattern $4995 Available dealer order dIrect 4L Add $2 shipping additional $2 COD Save COD send check money order WATER HOBBY ENTERPRISES 26 Sapphire Run Ocala FL 32672 5 687-2160 904-245-4653 next statistic Nothing happenedI lucky again Ive decided quit pushing luck some rules Im starting use right now recommend 1 Connect lead/acid battery charger battery want charge before plug charger AC supply other waythat charger already plugged AC supply connect charger output batterysparks will fly make con nection done charging unplug charger AC supply first should unclip charged lead acid battery charger charging oper ation generates lot hydrogen charged battery will probably bubbling think step disconnect battery charger dangerous Dont unclip charger until AC plug pulled 2 Never use lead/acid battery charge Ni-Cdt AC charger itself may producing gas inevitably sparks will occur charging Ni-Cds use lead/acid battery under charge advice doesnt apply does because have habit using charging battery leveling devicein effect using AC charger run Ni-Cd charger gives nice high-power charge Someday might really high-power charge have discontinued practice Ive lucky 3 Never connect Ni-Cd charger charge battery Ni-Cd pack plugged will cause heavy spark charger turned off Connect Ni-Cd charger charge battery first plug Ni-Cd pack Ni-Cd pack charged make sure charger turned off unplug Ni-Cd pack After can disconnect Ni-Cd charger charger battery before '4 using charger inverterthat boosts voltage seven cells can chargedbe very careful An inverter draws very high initial current no Ni-Cd pack connected may cause spark will much safer set up charger battery power cable booster charger can plug cable sparks farther away charge battery Use heavy-duty wire 14-gauge heavier 5 Use sealed lead/acid batteries much possible produce very little hydrogen gas Gel cells Gates cells made GE type writing months Safety column received second letter Mitch Poling described incident illustrates advocate fuses motor/battery circuit electric-powered models stated following reason among recommend fuses serious fire hazard shorted Ni-Cd pack presents currents can go well over 30 amps have plane burn up did have fuse heard problems similar until last week Howard Lazerson wrote tell about plane burned too did have fuse used bare spade lugs connect fuse plastic type spade con nectors type recommend crash flame Southern California such fire can result serious brushfire So Howard some fast work to put out fortunately able Howard using insulated spade lugs uninsulated ones Continued page 22 16Model Aviation INTRODUCING THE BLACK BARON / Exclusive roll-bars roil filets & undercambers BoTrou BONUSIII Two stands includ iuaj WEattaches iron STAND so los dont have look e span Lo engines POSI CURETM CYANOACRYLATE • ISI U J 1 [61 I1E1S lie] SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec495 Savings 50% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec$2950% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS 2135 Old Oakland Rd Jose CA FOR ORDERS ONLY PLEASt 80022832376 800 822-1688 Out StateIn California INFO 408 943-0872 Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 pushed together crash circumvented fuse always wrap spade connectors tape see now bare spade connectors rare item Most sold auto parts stores insulateda good thing way both ards plane 020-size four-cell packs Considering motor packs larger fire hazard shorted pack gets serious Pay attention insulation watch out shorting possibilities Thank Mitch sharing above safety tips readers Model Aviation well Mode Builder subject electric power Im going add third tip own Always discon nect motor battery model use Unlike fuel-powered model requires very deliberate series operations start motor Electric will spring life flick switch Just because Electrocs quiet doesnt mean props have less chewing ability equivalent-size fuel-powered model suppose manufacturers household electric fans put guards around blades Cer tainly improve appearance Model restraining devices subject prop-chewing incidents since column published pictures Jim Newmans Aus terized Telemaster during starting Jim uses wheel chocks Ive received number letters describe methods secure models starting ground-running engine An example such device fabricated PVC ABS water pipe fittings sent Otto Walinski owns Hobby Center Abilene TX As can seen accompanying photo graph Ottos device calls Face Saver secures model its stabilizer turn secured ground means metal spike passing through eyebolt vertical padded yoke unplugs release model may replugged parallel horizontal yoke convenient stowage transporting flying site Otto cautions others wish make such device should copied exactly $1495 plus postage willing supply device anyone wants interested write Janco 1175 N 2nd St Abilene TX 79601 Im also including photographs two other designs model-restraining devices submitted W E DenBeste Keith Wilson As Keith noted accompanying letter design such can also used secure model back family station wagon driving flying field dont already use some type restraining device secure model starting adjusting engine suggest consider other illustrated designs Model weight limit revisited Much has previously published column other columns modeling press concerning weight restriction 55 lb model aircraft stipulated paragraph five General section AMA Safety Code Mail received during last month informs move afoot persuade AMA Executive Council remove weight limit models built and/or flown according certain suggested plans appears plans have formulated because stifle growth experimenta tion radio-controlled aircraft now would like turning switch off projector finest Continued page 123 L sa mrrorI8o per order FAST SERVICE COD ADD $190 CIIVELANDS GI IS bondA WFOR R/C4UFFS hdlB4ip PoWyp No01. Wood end FeboIC Rofjo B4Mro Us T&o5b,oJoI Yo. Newt HietooiooIIy Pe.ntedl 87 Corn JN4 Jenny $37 61 OH Moqoito Bb $4 BA Fokko 07 FIr $39 108 DH MoqoBook $55 70 Boyle Ono-So $32 98 Stoor FT17Koydt $5 60 Howord Polo Boo $32 99 FIBIk Widow P61 $6 60 Sop. soon. S6B S34 71 Doog DC3 C47 $35-* 89 Soponoorino S6B $35 95 Doog [23 C47 $5 63 Con Howk P68 $42 86 Howko Tooooo 13 $3 94 Cort Howk P68 S54 64 Stoot SkyCo, $1 74 Doolioio G-B $48 72 Cor02$t /4 L&5 $4 95 Monoooopo Spool $36 108 Cor 0251/4 L&$ $5 00 808 Op Boiidog $43 60 Doogioo lo2 Moii $3 107 Aoronoo C3 Opt $3568 Oriotoi Boiidog Fir $3 62 Howord Boo ike $48 59 8ron8ooo MoLA $5 78 Tornor WW Boo $35 107 Grow 80001 P89 $5 63Cor GoIl FliC 542 69LindkorgoNX2ii $2 94 Cor CookI Ft 1C 85491 Liodkorg NX31 1 $3 66 Ool4oo Coorot Boo $24 96 WrNWlNov Roo $4 62 HowMrMoiiigoo $35 74 C Hoildor SB2C-4 $5 94 HosMrMotiigoo $45 108 FoirolrPT19 Yr $5 63 Booiog P-26A Ptr $36 60 Wooo Topor-Wing $3 84 Boolog P-26A FIr $48 98 Wooo Topor-Wiog $4 69 Woo0 C6 Cgkin $36 75 Wonlid Lyooodor $3 64 Boool Ct7-B Slog $38 100 Woold Lyooodor $4 96 Boool C17-B Slog 549 57 Ford Triorr 4-Al $3 55 Look ii Bleotro $38 76 Ford Trirolr 4AT $4 83 Look 11 Binolro $40 114 Food Trio 4-AT $65 62 Sinoo, T/W 087 $10 96 Boilooco Ainorolo $4 81 Stinoon nW $87 $26 93 Loonlng C2Anpk $6 123 Stioooo TIW 387 $38- 58 Grow J3F Dock $3 59 Molot FIr P28 $20 78 Grow J2-F Doot $5 118 Briloi FIr P288 $45 124 Look Air Eoproo-$4 74 Toroon Foooo $45 62 Look Air Boproto $ 56 Cc Workk P40 $24 83 Look Air Eopoooo $3 60 VogI Corooir P45 $35 77 WWw 131 BodL $480 80 vog Corsoir F4$ $69 63 C Sookowk F7C-t $4 78 Look Ligklog 9-38 $38 96 C Sookonok F7Ct $5 26 RopSow-Bo Aw 024 108 Sikor 0-38 Awpk $4 74 BopOoo-Bo Aw $39 60 Booing 100 Sport $3 70 Fipor J3 Cok$29 90 Booing 100 Sport $4 106 Piper J3 Cob83972 NortkropGowwo $4 98Look ttodsoo Bwk $38 96 Nortkroe Gowwo $7 63 Grow F6F Heitoot $28 90 OtinA Low 3/M $56 * 77 Booing 8170 Fort $35 60 S9nA Low 3/W 84 103 Boo 8170 Fort $55 120 StinoA Low 3/M $8 68 Wood Wklriwind $32 78 CoooiCotP8VSA 04 68 N Awor Novion $39 104 ConCotPBYSA $5 68 BBononeo V-Toil $29 65 MCkino Cii. $6 77 Loooowko Sodon $25 97 loCkino Ciippor $7 72 NA 8-25 Bowkor $49 62 Cortlo NC4 $5 65 MMoroodor 8-26 $49 94 Cortioo NC4 $6 AflON POICE OOICATo 00*0100 OtOO 01*01 PLAN Ovor 1200 Olkor 6 7S Au Potto looi SOc $p Add 10% oil ordors okipping & ioo. eto $$A Con & Moo Eioowkoro 15% Z25 olo Pioloriol oooolog $2$$ linotodo Polo LiotI Prioo II bootico i0 $100 oir loroigo odd $100 LEVELANDMODEL&SUPPLYCo LOwome 1 cOocaeAOcOOe-S oar wooBlooe lO309B8TBO4T AVI CLBVBLAND OHIO 4410t OtrooOoooo i 5Osool 50wti 22 Model Aviation Sat ety/ Preston Continued page 22 movie have ever seen never able view outcome movie has also stated put cap RCs safest area sport Giant Scale would tragedy Rather get soapbox give opinion whether current weight limit stifling growth experimentation Id like seek opinion readers subject Specif ically would like comments fol lowing two plans have submitted AMA VP may discussed AMA Executive Council upcoming meeting Plan #1 Remove existing 55-lb weight limit allow size RC aircraft flown providing A The aircraft non-man-carrying B The aircraft meets safety requirements C The aircraft has flown least six 12 times prior presentation D The model flown demonstration means no other aircraft will flown model being demon strated E The model will flown accordance what its full-scale counterpart able perform no would aerobatics 200-lb C-130 Plan #2 Keep existing 55-lb weight limit force create Experimental category FAA has category am certain EAA would hardly exist category RC models non-man-carrying type would fall Experimental category would subject certain regulations much like above restrictions A No weight limit B Non-man-carrying C No engine size limitations However IMAA would determine what minimum en gine sizes might recommended Under powered aircraft have proven danger ous under certain conditions D Twelve prior proven airworthy flights before model could demonstrated AMAIIMAA-sanctioned event E Model must pass safety inspection sanc tioned events meet safety standards equipment installation IMAA presently working updated version its present safety guidelines safety inspectors handbook will available 1987 reader would like copy present 1986 prior IMAA safety guidelines please drop line address end column include SASE Note new address moved end 1986 Rock ville MD Washington DC time column appears print have received IMAAs updated 1987 version safety guide lines will send recent version take time send opinion also take time send copy AMA VP has vote AMA Execu tive Council matters Have safe month John Preston 2812 Northampton St N W Washington DC 20015 e Register NOW. 87 NATS *SITE FEATURES.. Ample parking On-site Hobby Shop Frequency Analyser Single Site convenien/ Hotel/Motel accommodation S 0 Arnprior Summer Carnival Competitors INFOPAK now availablewrite yours today.. Canadian NATS 87 PO Box 5477 Postal StnF Ottawa Ont K2C 3M1 L April 1987123 *CLOSE TO.. ALOG $750 Deducted 1st order over $2500 2.*USA ~ *JAPAN Mi1hJhU ./OlbliYILI LU1 t RHANY responding advertisers mention thatyou read about MadelAvlatlon 1000s choose Solar rubber povered gliders copters scale lasercut diecut youcut rockets origami some vith ving span 6 feetl ALL MADE OUT OF PAPER Limited number printed i8i88A23455PAPER AIRPLANES INTERNATIONALI 213822-9185 1521 Morningslde Drive Burbank California91506USA
Edition: Model Aviation - 1987/04
Page Numbers: 14, 16, 22, 123
___John Preston___________________________ Safety Comes First Lead/acid batter ies can explode Model restrain ing devices Al low models over 55 lb AMA events EXPLODING BAITERIES Im sure aware jump-starting dead automobile battery possibility explosion can occur During last month re ceived letter Mitch Poling column safety written Model Builder magazine enclosed Mitchs column illustrates lead/acid batteries us use pursuit hobby may also present same hazard Excerpts Mitchs MB column Electric Power February 87 issue follows read JoIm Onians Offshore column November 1986 Model Airplane News about very bad charging accident Usually dont men tion safety other use fuses deserves some extra attention am doing because have strong feeling grace God go Mel Schmidt well-known Free Flight charging starting battery lead/acid battery Gas planes checked charger connection jiggling connector saw some sparks fly clip next thing knew hospital blind both eyes Since eye has recovered other damaged beyond repair battery fragments lead/acid battery exploded violently sounded like bomb Only some plates part bottom casing remained lead/acid battery generates hydrogen gas under charge violently explosive sparks no-no However time get away once awhile some comes up unlucky number Several years ago recall brochure 4 hi lii K IT TIME WE TAKE CLOSE LCOk AT OTI-IE RES-IVAINU4cV tEV ICES ished Shell Oil Co contained safety tips motorists tips addressed correct procedure connecting jumper cables between good dead car battery As best recall brochure said first con nect positive terminals two batteries jumper cable attach second cable negative terminal good battery make final connection negative cable some grounded part car away dead battery make final connection negative pole dead battery cause make final connection will sudden flow current will almost inevi tably result spark before achieve secure connection After starting car dead battery disconnection jumper cables should made reverse order connection So much starting dead car batteries Back Mitchs MB column use lead/acid batteries lot charge nickel-cadmium packs have seen lot sparks fly years Electric flying since 1972 have lucky know what hydrogen explosion like small hydrogen gas generator once blew up next because own carelessness Again lucky latest close call basement using six-amp charger charge 30-amphour lawnmower battery use shop charg ing connected Ni-Cd charger Ni-Cd connected sparks flew bat tery bubbling gas might very well have Continued page 16 14 Model Aviation Model-restraining device constructed plastIc water pipe fittings Otto Walin ski info columnIncluding order yourself Keith Wilsons device serves double duty restrains model its being transported family car also its being started flying field WE DenBeste used 1/2-in birch piywood model-restraining device folds storage transportation Note copy AMA Safety Code nearest upright piece IRON. WITh ROLL-BARSI 1% Blackatone coating slides like buffer almost no adhesive buildup /- HI-Tech 50 vthermostat solves bubble m9lster5f new Black Baron Iron designed specif icafly model airplanes photographers shoe manufacturers exdusive roll bars fit fillets & undercambers flat sole sheeted & open structures its bevelled edges provide constant heat marks toe rounded & flat turned up toes cute counter productive coating 100% Black stone big improvement over less expensive coatings slides like butter over tacky surfaces almost no adhesive buildup An advanced Hi-Tech thermostat reduces temperature drift 50 Ordinary irons vary up 400 No wonder get bubbles cant explain See dealer ask new Black Baron Iron ____ hes out stock patient iron hand made individually checked accuracy comes qual ity Coverite always striving something JL CGVERflE 420 Babylon Rd Horsham PA1 19044 DAVE RORELENS Parke eti Outstanding small field performance novice & expert alike om airfoils top performance quality balsa plywood gned 3 channels Precision machine-cut balsa plywood 5995 Playmate 3 ch 50 sportfun fly 1 5-25 2 4 cycle fast assembly hand-cut kit$4995 Pronto 50 span 15-252 4 cycle 3 ch. hand-cut kit easily converted dec excellent beginner also challenges expert $3995 Windbreaker 50 span 20-25 2 4 cycle 4 ch aerobatic docile 6-5 hr rapid-fire assembly preci sion pre-cut balsa & ply wood complete hardware package mci capable complete AMA pattern $4995 Available dealer order dIrect 4L Add $2 shipping additional $2 COD Save COD send check money order WATER HOBBY ENTERPRISES 26 Sapphire Run Ocala FL 32672 5 687-2160 904-245-4653 next statistic Nothing happenedI lucky again Ive decided quit pushing luck some rules Im starting use right now recommend 1 Connect lead/acid battery charger battery want charge before plug charger AC supply other waythat charger already plugged AC supply connect charger output batterysparks will fly make con nection done charging unplug charger AC supply first should unclip charged lead acid battery charger charging oper ation generates lot hydrogen charged battery will probably bubbling think step disconnect battery charger dangerous Dont unclip charger until AC plug pulled 2 Never use lead/acid battery charge Ni-Cdt AC charger itself may producing gas inevitably sparks will occur charging Ni-Cds use lead/acid battery under charge advice doesnt apply does because have habit using charging battery leveling devicein effect using AC charger run Ni-Cd charger gives nice high-power charge Someday might really high-power charge have discontinued practice Ive lucky 3 Never connect Ni-Cd charger charge battery Ni-Cd pack plugged will cause heavy spark charger turned off Connect Ni-Cd charger charge battery first plug Ni-Cd pack Ni-Cd pack charged make sure charger turned off unplug Ni-Cd pack After can disconnect Ni-Cd charger charger battery before '4 using charger inverterthat boosts voltage seven cells can chargedbe very careful An inverter draws very high initial current no Ni-Cd pack connected may cause spark will much safer set up charger battery power cable booster charger can plug cable sparks farther away charge battery Use heavy-duty wire 14-gauge heavier 5 Use sealed lead/acid batteries much possible produce very little hydrogen gas Gel cells Gates cells made GE type writing months Safety column received second letter Mitch Poling described incident illustrates advocate fuses motor/battery circuit electric-powered models stated following reason among recommend fuses serious fire hazard shorted Ni-Cd pack presents currents can go well over 30 amps have plane burn up did have fuse heard problems similar until last week Howard Lazerson wrote tell about plane burned too did have fuse used bare spade lugs connect fuse plastic type spade con nectors type recommend crash flame Southern California such fire can result serious brushfire So Howard some fast work to put out fortunately able Howard using insulated spade lugs uninsulated ones Continued page 22 16Model Aviation INTRODUCING THE BLACK BARON / Exclusive roll-bars roil filets & undercambers BoTrou BONUSIII Two stands includ iuaj WEattaches iron STAND so los dont have look e span Lo engines POSI CURETM CYANOACRYLATE • ISI U J 1 [61 I1E1S lie] SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec495 Savings 50% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec$2950% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS 2135 Old Oakland Rd Jose CA FOR ORDERS ONLY PLEASt 80022832376 800 822-1688 Out StateIn California INFO 408 943-0872 Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 pushed together crash circumvented fuse always wrap spade connectors tape see now bare spade connectors rare item Most sold auto parts stores insulateda good thing way both ards plane 020-size four-cell packs Considering motor packs larger fire hazard shorted pack gets serious Pay attention insulation watch out shorting possibilities Thank Mitch sharing above safety tips readers Model Aviation well Mode Builder subject electric power Im going add third tip own Always discon nect motor battery model use Unlike fuel-powered model requires very deliberate series operations start motor Electric will spring life flick switch Just because Electrocs quiet doesnt mean props have less chewing ability equivalent-size fuel-powered model suppose manufacturers household electric fans put guards around blades Cer tainly improve appearance Model restraining devices subject prop-chewing incidents since column published pictures Jim Newmans Aus terized Telemaster during starting Jim uses wheel chocks Ive received number letters describe methods secure models starting ground-running engine An example such device fabricated PVC ABS water pipe fittings sent Otto Walinski owns Hobby Center Abilene TX As can seen accompanying photo graph Ottos device calls Face Saver secures model its stabilizer turn secured ground means metal spike passing through eyebolt vertical padded yoke unplugs release model may replugged parallel horizontal yoke convenient stowage transporting flying site Otto cautions others wish make such device should copied exactly $1495 plus postage willing supply device anyone wants interested write Janco 1175 N 2nd St Abilene TX 79601 Im also including photographs two other designs model-restraining devices submitted W E DenBeste Keith Wilson As Keith noted accompanying letter design such can also used secure model back family station wagon driving flying field dont already use some type restraining device secure model starting adjusting engine suggest consider other illustrated designs Model weight limit revisited Much has previously published column other columns modeling press concerning weight restriction 55 lb model aircraft stipulated paragraph five General section AMA Safety Code Mail received during last month informs move afoot persuade AMA Executive Council remove weight limit models built and/or flown according certain suggested plans appears plans have formulated because stifle growth experimenta tion radio-controlled aircraft now would like turning switch off projector finest Continued page 123 L sa mrrorI8o per order FAST SERVICE COD ADD $190 CIIVELANDS GI IS bondA WFOR R/C4UFFS hdlB4ip PoWyp No01. Wood end FeboIC Rofjo B4Mro Us T&o5b,oJoI Yo. Newt HietooiooIIy Pe.ntedl 87 Corn JN4 Jenny $37 61 OH Moqoito Bb $4 BA Fokko 07 FIr $39 108 DH MoqoBook $55 70 Boyle Ono-So $32 98 Stoor FT17Koydt $5 60 Howord Polo Boo $32 99 FIBIk Widow P61 $6 60 Sop. soon. S6B S34 71 Doog DC3 C47 $35-* 89 Soponoorino S6B $35 95 Doog [23 C47 $5 63 Con Howk P68 $42 86 Howko Tooooo 13 $3 94 Cort Howk P68 S54 64 Stoot SkyCo, $1 74 Doolioio G-B $48 72 Cor02$t /4 L&5 $4 95 Monoooopo Spool $36 108 Cor 0251/4 L&$ $5 00 808 Op Boiidog $43 60 Doogioo lo2 Moii $3 107 Aoronoo C3 Opt $3568 Oriotoi Boiidog Fir $3 62 Howord Boo ike $48 59 8ron8ooo MoLA $5 78 Tornor WW Boo $35 107 Grow 80001 P89 $5 63Cor GoIl FliC 542 69LindkorgoNX2ii $2 94 Cor CookI Ft 1C 85491 Liodkorg NX31 1 $3 66 Ool4oo Coorot Boo $24 96 WrNWlNov Roo $4 62 HowMrMoiiigoo $35 74 C Hoildor SB2C-4 $5 94 HosMrMotiigoo $45 108 FoirolrPT19 Yr $5 63 Booiog P-26A Ptr $36 60 Wooo Topor-Wing $3 84 Boolog P-26A FIr $48 98 Wooo Topor-Wiog $4 69 Woo0 C6 Cgkin $36 75 Wonlid Lyooodor $3 64 Boool Ct7-B Slog $38 100 Woold Lyooodor $4 96 Boool C17-B Slog 549 57 Ford Triorr 4-Al $3 55 Look ii Bleotro $38 76 Ford Trirolr 4AT $4 83 Look 11 Binolro $40 114 Food Trio 4-AT $65 62 Sinoo, T/W 087 $10 96 Boilooco Ainorolo $4 81 Stinoon nW $87 $26 93 Loonlng C2Anpk $6 123 Stioooo TIW 387 $38- 58 Grow J3F Dock $3 59 Molot FIr P28 $20 78 Grow J2-F Doot $5 118 Briloi FIr P288 $45 124 Look Air Eoproo-$4 74 Toroon Foooo $45 62 Look Air Boproto $ 56 Cc Workk P40 $24 83 Look Air Eopoooo $3 60 VogI Corooir P45 $35 77 WWw 131 BodL $480 80 vog Corsoir F4$ $69 63 C Sookowk F7C-t $4 78 Look Ligklog 9-38 $38 96 C Sookonok F7Ct $5 26 RopSow-Bo Aw 024 108 Sikor 0-38 Awpk $4 74 BopOoo-Bo Aw $39 60 Booing 100 Sport $3 70 Fipor J3 Cok$29 90 Booing 100 Sport $4 106 Piper J3 Cob83972 NortkropGowwo $4 98Look ttodsoo Bwk $38 96 Nortkroe Gowwo $7 63 Grow F6F Heitoot $28 90 OtinA Low 3/M $56 * 77 Booing 8170 Fort $35 60 S9nA Low 3/W 84 103 Boo 8170 Fort $55 120 StinoA Low 3/M $8 68 Wood Wklriwind $32 78 CoooiCotP8VSA 04 68 N Awor Novion $39 104 ConCotPBYSA $5 68 BBononeo V-Toil $29 65 MCkino Cii. $6 77 Loooowko Sodon $25 97 loCkino Ciippor $7 72 NA 8-25 Bowkor $49 62 Cortlo NC4 $5 65 MMoroodor 8-26 $49 94 Cortioo NC4 $6 AflON POICE OOICATo 00*0100 OtOO 01*01 PLAN Ovor 1200 Olkor 6 7S Au Potto looi SOc $p Add 10% oil ordors okipping & ioo. eto $$A Con & Moo Eioowkoro 15% Z25 olo Pioloriol oooolog $2$$ linotodo Polo LiotI Prioo II bootico i0 $100 oir loroigo odd $100 LEVELANDMODEL&SUPPLYCo LOwome 1 cOocaeAOcOOe-S oar wooBlooe lO309B8TBO4T AVI CLBVBLAND OHIO 4410t OtrooOoooo i 5Osool 50wti 22 Model Aviation Sat ety/ Preston Continued page 22 movie have ever seen never able view outcome movie has also stated put cap RCs safest area sport Giant Scale would tragedy Rather get soapbox give opinion whether current weight limit stifling growth experimentation Id like seek opinion readers subject Specif ically would like comments fol lowing two plans have submitted AMA VP may discussed AMA Executive Council upcoming meeting Plan #1 Remove existing 55-lb weight limit allow size RC aircraft flown providing A The aircraft non-man-carrying B The aircraft meets safety requirements C The aircraft has flown least six 12 times prior presentation D The model flown demonstration means no other aircraft will flown model being demon strated E The model will flown accordance what its full-scale counterpart able perform no would aerobatics 200-lb C-130 Plan #2 Keep existing 55-lb weight limit force create Experimental category FAA has category am certain EAA would hardly exist category RC models non-man-carrying type would fall Experimental category would subject certain regulations much like above restrictions A No weight limit B Non-man-carrying C No engine size limitations However IMAA would determine what minimum en gine sizes might recommended Under powered aircraft have proven danger ous under certain conditions D Twelve prior proven airworthy flights before model could demonstrated AMAIIMAA-sanctioned event E Model must pass safety inspection sanc tioned events meet safety standards equipment installation IMAA presently working updated version its present safety guidelines safety inspectors handbook will available 1987 reader would like copy present 1986 prior IMAA safety guidelines please drop line address end column include SASE Note new address moved end 1986 Rock ville MD Washington DC time column appears print have received IMAAs updated 1987 version safety guide lines will send recent version take time send opinion also take time send copy AMA VP has vote AMA Execu tive Council matters Have safe month John Preston 2812 Northampton St N W Washington DC 20015 e Register NOW. 87 NATS *SITE FEATURES.. Ample parking On-site Hobby Shop Frequency Analyser Single Site convenien/ Hotel/Motel accommodation S 0 Arnprior Summer Carnival Competitors INFOPAK now availablewrite yours today.. Canadian NATS 87 PO Box 5477 Postal StnF Ottawa Ont K2C 3M1 L April 1987123 *CLOSE TO.. ALOG $750 Deducted 1st order over $2500 2.*USA ~ *JAPAN Mi1hJhU ./OlbliYILI LU1 t RHANY responding advertisers mention thatyou read about MadelAvlatlon 1000s choose Solar rubber povered gliders copters scale lasercut diecut youcut rockets origami some vith ving span 6 feetl ALL MADE OUT OF PAPER Limited number printed i8i88A23455PAPER AIRPLANES INTERNATIONALI 213822-9185 1521 Morningslde Drive Burbank California91506USA