John Preston Safety812 Corny First Northampion Sc NW Washington DC column provided address items concern regauing safety aspects model aviation activities Content column however opinion author does necessadly represent official position Academy Model Aeronautics Use extra caution recharging NiCd battery packs Power panel hazard danger overheating Super Glue joints BATTERY PACK FIRES June 1988 Salfety Comes First column mentioned couple incidents alleged NiCd batteries being recharged cause fires destroyed houses two model ers column asked anyone else ex perienced incident fire resulted Ni-Cds being charged Several modelers re sponded descriptions incidentsnone fortunately resulted loss home David Reagan modeler Englewood CO sent photograph receiver pack showing much charring heat shrink covering end together following letter Enclosed picture battery pack just happened take out airplane re charge evening As recall used about year performed problems No modifications other changes made it standard bat tery pack came radio being recharged charger supplied radio standard four-channel setup Once started burningand did burn open flame until whole end charredit impossible extinguish though out open workbench hesitate estimate damage should have occurred airplane checking charger later found everything normal have since used charger times other bat tery packs incident consider myself inexperienced model aviation since have building mod els over 30 years am copilot United Air lines have A&P license What am say ing consider myself well qualified care feeding batteries mechanical contrivances incident caught sur prise As say aint careful might learn something arned some thing guess Davids battery fire result some kind fault developing bat tery pack over its approximately year use Since Im mechanical engineer rather electrical engineer Im going try guess what fault nor occurred Like Da vid can say battery model time incident results could have very much serious As clear next letter John Ath erton Stockton CA charger problems too can result fires own words Johns experi ence follows wanted hear about fires such battery chargers Although Im airplane nut wife likes trucks RC cars Thats ended up truck charger As per instruc tions discharged six-cell battery pack com pletely before recharging turned switch Charge timer 15 minutes turned TV sat back became en grossed movieforgetting about charger As well can figure chargers timer dial became stock 15-minute mark quite some time sure long next thing knew like Vietnam over again think yelled Incoming several loud bangs pieces flying over house piece carpet truck sitting caught fire should noted batteries being charged still truck cell flew Out truck went through box charger sitting broke side chargers plastic case no other damage other door truck holds batter ies place warped heat swept up carbon other pieces batteries week afterward fortu nate now very careful set another timer chimes remind us charger Johns letter reminded charging inci dent experienced number years ago RC equipment manufacturers first intro duced dual-rate chargers connected receiver pack charger set High Rate As recall 20 minutes recommended dura tion charging rate guessed promptly forgot about think must have changed mind about going flying day something Anyway 24 hours later remembered what done previous day rushed down basement correct error hot receiver pack moral story al ways what John Atherton now does Buy timer chime other type alarm hu man memory infallible letter George Erdel Jacksonville FL pointed Out self-incineration batteries being charged confined used RC models letter follows just read article Ni-Cd battery charg ing fires problem can encountered model aircraft also prob lem full-scale aircraft condition known Continued page 16 14 Model Aviation CRA4iD TO 17 WANT THIS BATTERY PACK CVE--EASY1 ORV/ILLTI4IS DQ ChicAqo ModEl Hobby Show R/C Planes Cars Boats Trains & Games October 14-1619880 OHare Expo Center ago Illinois Hours Friday October144pm 10 pm Saturday October1510 am 6 pm Sunday October1610 am 5 pm Admission Adults$500 Children 6 12$250 Children 5 underFree Sponsored Radio Control Hobby Trade Association RCHTA CoSponsored Model Railroad Industry Association MRIA See 350 &hi bits Hottest New Model & Hobby Equipment PLUS Boat Pond Track il Store l Railroad Demonstrations NEW 88 AMA Model Display Open Trade Only October 13 10 am 6 pm & October 14 10 am 4 pm thermal runaway process goes like battery charging naturaliy gets warm rise temperature also get corresponding rise internal resistabce turn causes another rise temperature caus ing another increase internal resistance As can see continuous cycle will end battery destroys itself selfincineration important monitor charging process assure maximum safe charging current exceeded may take longer charge standard trickle charger comes radio gearbut much safer rapid charger used should done batteries approved manufacturer fast charging Thermal runaway can occur during charging battery Without charging cur rent being present whole cycle comes halt batteries feel hot touch during charging should immediately discon nected charging source have taught young fliers periodically check battery temperature charger have felt HOT Ni-Cd fast-charging video camcorder battery have seen hot can get wife checks has properly instructed disconnect temperature starts rise problem has cause several fa tal accidents turbine-powered aircraft avi ation industry has installed temperature sensors batteries monitored cockpit temperature gauges annunciators good example yet another similar ity between Scale models full-scale brothers Continued page 18 INTRODUCING rHE \ELET/L7L/TE FOR 020035-050 ELECTRIC S 30 AREA 257 CHANNELS 2-3 30TH 30 FLYrNO WT TO 3002 Instantly removable in-cycle gear wheels Pra-built boom landing gaar sockata & push-rode Aatro motor mount cobalt adapter Pra-formed leading adgea knotchad trailing edgea AirframeS oz. anding gear Perfect performanca 020-035-36 cysiams Maximum duration & glider-like motor-off flight cheracteriatica ARF build ft cover wing elee completely built jell surfacea hingad . *7996 wlo gear p696 gear ladd $3 ahipping TX rea add 6% ealee taxI Designed built Electric Modal Co 218 Oyster k r Lend TX 77479 242-6229 Souths rgest inventory astro motors ft acceasorien Need help sefth electtc alrgieee alder Ask br Don 16 Model Aviation Fourth Annual CAhbI1 RIC Idle-Bar Glow Plugs Long Short Only $189 BLUES RRCAT getting down get protected RRCATT mask Safety Plus mask will eliminate RRCArT fumes epoxy polyester resin vapors air breath Lightweight easy breathing comfortable CA Mask $1595 Paint Mask $2045 See hobby dealer first doesnt have what need order direct Safety Plus PO Box 1173 Dept 12M Clinton Mississippi 39056 Call toll free 1-800-842-7233 Mississippi dial 601-924-9640 VISA MASTERCARD accepted COD add $250 shipping handling included Dealer Inquiries Invited Also. Traditional line nonidle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates PO Box 151 ce 7948 Wayne NJ 07470 BALSA SHEETS 36 45 30 1/162 33 3132 2 40 1/8 n2 43 31162 49 114 2 56 1/323 37 1/203 37 1/163 3749 31 3/323 4458 27 1/8 3 5471 45 3/163 628255 1/4 9561 5/163 65 110 3/8 n388 12471 1/2 3 110 155 34 n3 165 191 1/104 59 76 48 3/324 70 94 56 1/8 n4 80 106 66 3/164 93 122 75 1144110 134 64 3/84165 225 139 /2 4 225 261 MATCHED SHEETS 42 3/324100 1/84105 3/164120 1/44131 BALSA STICKS 3648 1/18 1/4 09 116 3/8 10 116 1/2 14 3/32 14 10 3/32 3/9 12 332 12 16 1/6 10 08 1/8 381218 1/9 121024 3163/161116 316 3/81720 316 1/22230 14 141624 1/4 381926 /4 122130 1/4 3/43444 1/4 14555 5/165/162128 3/8 3/82737 3/8 1/23246 3/0 3/44255 36 15270 12 123653 12 3/44662 12 15978 5/6 564865 3/4 90 w BALSA TRIANGLES 36 4425 383830 2235 343445 55 SAL BA PLANKS 36 85 250 3200 4280 11/23275 1124360 22225 23325 24435 33495 34688124282 TAPERED SHEETS36 1/42 65TRAILING EDGE36 143 8514132 382 695/181 1439 3/83 993811246 1/2312012270 LONE STAR EPOXY 9Lot800 Sm,588 15mm588 30mm599 INSTANT GLUE 1 0 Think299 1 cc TSn299 2, TSi,050 2cc rh/n550 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% you are serious modeler want performance must try 4-6 lb balsa BASSWOOD48 3/163/1626 3/181/430 3/163/838 3/181/246 3183/460 1/41442 1/43/949 143/480 3/93/960 3/91/270 3/93/490 1/21/200 SUNDLE DEALS 39-1/18338685 201/164381020 203/323368411 15-3/32436950 15-1/8336715 1018436675 15316336900 103/16438810 101/4336630 1014436990 1039336850 53/8436825 51/2336540 51/24391000 10332448845 51/8440485 03/164 48585 51/4448825 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 18 1/81522 18 141824 19 3/82029 316 3162534 1/4 1/43145 1/4 3/83650 1/4 1/24565 3/8 3/84563 3/8 1/25570 1/2 1/20088 1/23/488 99 SPRUCE TRIANGLES 36 3/83/8 40 1/21/2 61 343/4 77 LITEPLS 48 1/86100 1/812300 1/412475 HARD MAPLE 1/43/8 3/8 3/8 3812 3/834 123/4 40 40 50 58 66 BIRCH DOWELS36 1/909 31611 1414 51625 3832 3PLYBIRCH48 16412620 1/3212449 1/1612455 1/912450 S PLY BIRCH 3/32 12 1/812 3/16 12 1/412 3/8 12 1/212 48 999 828 825 825 725 900 GROOVED LG MOUNTS l2lachaa 393/4/18/40 3/83/4/5/32/40 1/23/4/316/45 Cost 48 Handling charge W pay UPS Add $250 COD $300 extra PP APO FPO Statee accept V188 Master Card personal checks COO 6W Ia To, US carrency onip Mini,, Wood Order $1000 LIGHT 4-6 LB WOOD36 132349 120349 118349 3/323S6 1/8367 316376 14395 3/83115 1/23139 3/43220 13300 1/16478 332 194100 3/164117 144139 384207 6tg may greater likelihood battery-related fire during charging operations letter George Sommerer Rock Hilt SC modeler describes another type fire caused models battery pack flying electric-powered airplane too windy day downwind turn just af ter takeoff resulted unscheduled uncon trolled landing sounds better crash impact severe enough separate re ceiver battery wires connector re ceiver pack 500 mAb fully charged since first flight day gathered pieces balsa foam bat teries electric motor etc put pa per bag bag placed back pickup truck wife went about business watching other club members fly cannot tell exact time longer 10 minutes noticed paper bag smoldering about burst flames dumped bag Out stepped smold ering pieces found culprit wires pulled out connector plug receiver pack touched shorted pack creating enough heat start fire consider myself conscientious person either overlooked shorting dismissed mind being anything serious did fact torn out have minor consequences ponder what could have happened bag put cab truck left flying field right after crash Also wonder what might have happened plane gas-powered instead electricpowered put fuel-soaked foam balsa bag final item wife operate Continued page 131 18 Model Aviation Dual Stnit Nose Gear 161 loistannel -5F3502 A/0801195 [~I4IIIiI{ 5/3260001405 AFOSO0 750S 1 Fults Tooling PO Box 95 Champagn IL 61820 Wa SUNSHINE HOBBY READY TO FLY Call 1-800-45-TO FLY ACCESSORIES INCLUDED PIPER CHEROKEE-40$12999 PIPER CHEROKEE-2510899 FOKKER E111-4011999 FANCY STICK-4011499 FANCY STICK-256999 CESSNA 172-2010899 CONOOR-40L11999 TERCEL-4512199 ENGINE NOT INCLUDED PIONEER CAR$6000 ENGINE INCLUDED 17221 South Western Avenue Gardena California 90247 CONTACT us FOR THIS MONTHS SPECIAL WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE Call 306 745 6394 10am -6 pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 PROTEC YOUR EYES IN COMFORT WITH AFFORDABLE HANDSOME SAFE! 6LASSES vision 15 important sense high-quality scratch resistant polycarbonate lens safety glasses must modelers Available clear gray dark green light green gradient mirrored gray lens Adjustable temples Wide view ANSI Z87l approved GREAT PRICES Iwant protect Iiny eyes wIth style aad comfort LlCIear-$725 eaL Gray-$855ea LLL Green-$855ea L]Dk Green-$8SSea ientMirror-$t05Oea ADDRESS crIYSTATEtZIP Send check er money order C&C Enterprises 141 Willa Dr Columbia SC 29209 SC Residents add 5% Sales Tax Safety/Preston Continued page 18 hobby store occasion have youngster bring 72-volt car pack shrink wrap melted off due over charging never given much thought un dl fire Now try explain possible dangers overcharging fast-chargers get info fast-charging its possible dangers Ill get back Another report fire occurred fly ing field described letter Richard Kaye Richards incident involved field box like used us contained battery power panel own words heres what happened few years ago purchased garden-variety power panel flight box major mail order firm Despite apparent dangers its de sign see similar units still readily avail able panel has glow plug driver am meter rheostat Im well versed elec tronics believe delivers 12 volts pulse bum out glow plug ammeter hooked up parallel mchrome wire coil serves resistor calibrate meter current delivery Until accident never imagined uncovered wire could potential source danger time happened using alli gator clips attach leads glow plug clips attached power cord staggered fashion avoid shorting have since learned wire leads sufficiently flexible short may still result power panel mounted box above storage bin clips shorted exposed nichrome wire heated sufficiently burn through fail some fuel-soaked pa per toweling lying bin finished flight amazed find smoky fire going field box time total loss explain got started Fuel rife report explosion fire modelers basement appeared May 3 issue Newsday Long Island NY newspaper Hank Anholzer modeler Valley Stream NY sent clipping report AMA HQ attention According report modeler assembling -propelled model air plane wife two children watched television another area familys finished basement explosion modeler ap peared flames knocked floor other family members rolled blanket Upon being taken hospital listed stable condition burns hands leg chest Fire officials believed cause explosion fumes variety fuels basement However ignition source reported appears modeler AMA mem ber intend follow up report try determine ignition source Meanwhile suggest check own workshop areas see flannnable liquids materials stored safe manneraway likely igni tion sources Super glue bold headiine wam ing notice appeared bulletin board plant major aircraft manufacturer old friend Clarence Ehrlich employed Clar ence able determine origin warning stated super glues contain cy anoacrylate anything repaired such glue subsequently heated will produce hydro gen cyanide gas specifically notice stated 5250 F gas will 10 times threshold limit fatal particu larly dangerous kitchenware has repaired placed oven discussed statement co-worker happens work area toxic materi als opinion hydrogen cyanide gas may released product repaired CyA glue heated would such small quantity would uniikely constitute health hazard let alone fatal anyone read ing column has information says other wise Id like hear As postscript elect drop line please use home address shown head column letters addressed AMA HQ get forwarded someone has take time perform task Have safe month aware energy contained battery packs Seely/Wei n reich Continued page 23 mic books model magazines course printed cheap paper simply disintegrated over years y became dealer 1967 opportunity buy out existing dealer wanted leave business fellow aeronautica dealer Blame small town Canadian border says Seely knew him stock urging wife took plunge Seely found out too surprisingly bank refused take old airplane books magazines collateral However able borrow needed $2000 bought collection published first list successful enough pay loan off seven months Now 20 years later Seelys old airplane books maga zines look like very good collateral indeed banks Since time has bought out several collectors dealers wanted exit business retire also buys estates other dealers have bought general collections interested aviation portions 1972 bought world-famous EL Sterne Aeronautica bookstore San Francisco Sterne re tired As dealer Blame Seely known Sterne years regards him mentor 1974 Seely bought out another big col lector dealer Richard Bueschel Chi cago some bargaining back forth end Bueschel sold Seely reasonable price because knew Seely knew prized collection would respected Getting Bueschel collection back home Olympia WA adventure itself Seely brother-in-law flew Chicago loaded THE LEADER IN COMPETITION N SERIES 100 \DIAPRICE 16 NEW PRO SERIES 3 II I NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN TH RU ST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCH PRICE 53/34 634 72833/456 833/4568 64566/7 94566/77 104566/7 106W6W 106EW Ii4677/7/78 115W 116EW 1167 124W 125W 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N5N 8I 67/7/6 SERIES 400C 86677/7 977/7/ W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 6 677 8 677 8 67 678 September 1988 131
Edition: Model Aviation - 1988/09
Page Numbers: 14, 16, 18, 131
John Preston Safety812 Corny First Northampion Sc NW Washington DC column provided address items concern regauing safety aspects model aviation activities Content column however opinion author does necessadly represent official position Academy Model Aeronautics Use extra caution recharging NiCd battery packs Power panel hazard danger overheating Super Glue joints BATTERY PACK FIRES June 1988 Salfety Comes First column mentioned couple incidents alleged NiCd batteries being recharged cause fires destroyed houses two model ers column asked anyone else ex perienced incident fire resulted Ni-Cds being charged Several modelers re sponded descriptions incidentsnone fortunately resulted loss home David Reagan modeler Englewood CO sent photograph receiver pack showing much charring heat shrink covering end together following letter Enclosed picture battery pack just happened take out airplane re charge evening As recall used about year performed problems No modifications other changes made it standard bat tery pack came radio being recharged charger supplied radio standard four-channel setup Once started burningand did burn open flame until whole end charredit impossible extinguish though out open workbench hesitate estimate damage should have occurred airplane checking charger later found everything normal have since used charger times other bat tery packs incident consider myself inexperienced model aviation since have building mod els over 30 years am copilot United Air lines have A&P license What am say ing consider myself well qualified care feeding batteries mechanical contrivances incident caught sur prise As say aint careful might learn something arned some thing guess Davids battery fire result some kind fault developing bat tery pack over its approximately year use Since Im mechanical engineer rather electrical engineer Im going try guess what fault nor occurred Like Da vid can say battery model time incident results could have very much serious As clear next letter John Ath erton Stockton CA charger problems too can result fires own words Johns experi ence follows wanted hear about fires such battery chargers Although Im airplane nut wife likes trucks RC cars Thats ended up truck charger As per instruc tions discharged six-cell battery pack com pletely before recharging turned switch Charge timer 15 minutes turned TV sat back became en grossed movieforgetting about charger As well can figure chargers timer dial became stock 15-minute mark quite some time sure long next thing knew like Vietnam over again think yelled Incoming several loud bangs pieces flying over house piece carpet truck sitting caught fire should noted batteries being charged still truck cell flew Out truck went through box charger sitting broke side chargers plastic case no other damage other door truck holds batter ies place warped heat swept up carbon other pieces batteries week afterward fortu nate now very careful set another timer chimes remind us charger Johns letter reminded charging inci dent experienced number years ago RC equipment manufacturers first intro duced dual-rate chargers connected receiver pack charger set High Rate As recall 20 minutes recommended dura tion charging rate guessed promptly forgot about think must have changed mind about going flying day something Anyway 24 hours later remembered what done previous day rushed down basement correct error hot receiver pack moral story al ways what John Atherton now does Buy timer chime other type alarm hu man memory infallible letter George Erdel Jacksonville FL pointed Out self-incineration batteries being charged confined used RC models letter follows just read article Ni-Cd battery charg ing fires problem can encountered model aircraft also prob lem full-scale aircraft condition known Continued page 16 14 Model Aviation CRA4iD TO 17 WANT THIS BATTERY PACK CVE--EASY1 ORV/ILLTI4IS DQ ChicAqo ModEl Hobby Show R/C Planes Cars Boats Trains & Games October 14-1619880 OHare Expo Center ago Illinois Hours Friday October144pm 10 pm Saturday October1510 am 6 pm Sunday October1610 am 5 pm Admission Adults$500 Children 6 12$250 Children 5 underFree Sponsored Radio Control Hobby Trade Association RCHTA CoSponsored Model Railroad Industry Association MRIA See 350 &hi bits Hottest New Model & Hobby Equipment PLUS Boat Pond Track il Store l Railroad Demonstrations NEW 88 AMA Model Display Open Trade Only October 13 10 am 6 pm & October 14 10 am 4 pm thermal runaway process goes like battery charging naturaliy gets warm rise temperature also get corresponding rise internal resistabce turn causes another rise temperature caus ing another increase internal resistance As can see continuous cycle will end battery destroys itself selfincineration important monitor charging process assure maximum safe charging current exceeded may take longer charge standard trickle charger comes radio gearbut much safer rapid charger used should done batteries approved manufacturer fast charging Thermal runaway can occur during charging battery Without charging cur rent being present whole cycle comes halt batteries feel hot touch during charging should immediately discon nected charging source have taught young fliers periodically check battery temperature charger have felt HOT Ni-Cd fast-charging video camcorder battery have seen hot can get wife checks has properly instructed disconnect temperature starts rise problem has cause several fa tal accidents turbine-powered aircraft avi ation industry has installed temperature sensors batteries monitored cockpit temperature gauges annunciators good example yet another similar ity between Scale models full-scale brothers Continued page 18 INTRODUCING rHE \ELET/L7L/TE FOR 020035-050 ELECTRIC S 30 AREA 257 CHANNELS 2-3 30TH 30 FLYrNO WT TO 3002 Instantly removable in-cycle gear wheels Pra-built boom landing gaar sockata & push-rode Aatro motor mount cobalt adapter Pra-formed leading adgea knotchad trailing edgea AirframeS oz. anding gear Perfect performanca 020-035-36 cysiams Maximum duration & glider-like motor-off flight cheracteriatica ARF build ft cover wing elee completely built jell surfacea hingad . *7996 wlo gear p696 gear ladd $3 ahipping TX rea add 6% ealee taxI Designed built Electric Modal Co 218 Oyster k r Lend TX 77479 242-6229 Souths rgest inventory astro motors ft acceasorien Need help sefth electtc alrgieee alder Ask br Don 16 Model Aviation Fourth Annual CAhbI1 RIC Idle-Bar Glow Plugs Long Short Only $189 BLUES RRCAT getting down get protected RRCATT mask Safety Plus mask will eliminate RRCArT fumes epoxy polyester resin vapors air breath Lightweight easy breathing comfortable CA Mask $1595 Paint Mask $2045 See hobby dealer first doesnt have what need order direct Safety Plus PO Box 1173 Dept 12M Clinton Mississippi 39056 Call toll free 1-800-842-7233 Mississippi dial 601-924-9640 VISA MASTERCARD accepted COD add $250 shipping handling included Dealer Inquiries Invited Also. Traditional line nonidle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates PO Box 151 ce 7948 Wayne NJ 07470 BALSA SHEETS 36 45 30 1/162 33 3132 2 40 1/8 n2 43 31162 49 114 2 56 1/323 37 1/203 37 1/163 3749 31 3/323 4458 27 1/8 3 5471 45 3/163 628255 1/4 9561 5/163 65 110 3/8 n388 12471 1/2 3 110 155 34 n3 165 191 1/104 59 76 48 3/324 70 94 56 1/8 n4 80 106 66 3/164 93 122 75 1144110 134 64 3/84165 225 139 /2 4 225 261 MATCHED SHEETS 42 3/324100 1/84105 3/164120 1/44131 BALSA STICKS 3648 1/18 1/4 09 116 3/8 10 116 1/2 14 3/32 14 10 3/32 3/9 12 332 12 16 1/6 10 08 1/8 381218 1/9 121024 3163/161116 316 3/81720 316 1/22230 14 141624 1/4 381926 /4 122130 1/4 3/43444 1/4 14555 5/165/162128 3/8 3/82737 3/8 1/23246 3/0 3/44255 36 15270 12 123653 12 3/44662 12 15978 5/6 564865 3/4 90 w BALSA TRIANGLES 36 4425 383830 2235 343445 55 SAL BA PLANKS 36 85 250 3200 4280 11/23275 1124360 22225 23325 24435 33495 34688124282 TAPERED SHEETS36 1/42 65TRAILING EDGE36 143 8514132 382 695/181 1439 3/83 993811246 1/2312012270 LONE STAR EPOXY 9Lot800 Sm,588 15mm588 30mm599 INSTANT GLUE 1 0 Think299 1 cc TSn299 2, TSi,050 2cc rh/n550 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% you are serious modeler want performance must try 4-6 lb balsa BASSWOOD48 3/163/1626 3/181/430 3/163/838 3/181/246 3183/460 1/41442 1/43/949 143/480 3/93/960 3/91/270 3/93/490 1/21/200 SUNDLE DEALS 39-1/18338685 201/164381020 203/323368411 15-3/32436950 15-1/8336715 1018436675 15316336900 103/16438810 101/4336630 1014436990 1039336850 53/8436825 51/2336540 51/24391000 10332448845 51/8440485 03/164 48585 51/4448825 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 18 1/81522 18 141824 19 3/82029 316 3162534 1/4 1/43145 1/4 3/83650 1/4 1/24565 3/8 3/84563 3/8 1/25570 1/2 1/20088 1/23/488 99 SPRUCE TRIANGLES 36 3/83/8 40 1/21/2 61 343/4 77 LITEPLS 48 1/86100 1/812300 1/412475 HARD MAPLE 1/43/8 3/8 3/8 3812 3/834 123/4 40 40 50 58 66 BIRCH DOWELS36 1/909 31611 1414 51625 3832 3PLYBIRCH48 16412620 1/3212449 1/1612455 1/912450 S PLY BIRCH 3/32 12 1/812 3/16 12 1/412 3/8 12 1/212 48 999 828 825 825 725 900 GROOVED LG MOUNTS l2lachaa 393/4/18/40 3/83/4/5/32/40 1/23/4/316/45 Cost 48 Handling charge W pay UPS Add $250 COD $300 extra PP APO FPO Statee accept V188 Master Card personal checks COO 6W Ia To, US carrency onip Mini,, Wood Order $1000 LIGHT 4-6 LB WOOD36 132349 120349 118349 3/323S6 1/8367 316376 14395 3/83115 1/23139 3/43220 13300 1/16478 332 194100 3/164117 144139 384207 6tg may greater likelihood battery-related fire during charging operations letter George Sommerer Rock Hilt SC modeler describes another type fire caused models battery pack flying electric-powered airplane too windy day downwind turn just af ter takeoff resulted unscheduled uncon trolled landing sounds better crash impact severe enough separate re ceiver battery wires connector re ceiver pack 500 mAb fully charged since first flight day gathered pieces balsa foam bat teries electric motor etc put pa per bag bag placed back pickup truck wife went about business watching other club members fly cannot tell exact time longer 10 minutes noticed paper bag smoldering about burst flames dumped bag Out stepped smold ering pieces found culprit wires pulled out connector plug receiver pack touched shorted pack creating enough heat start fire consider myself conscientious person either overlooked shorting dismissed mind being anything serious did fact torn out have minor consequences ponder what could have happened bag put cab truck left flying field right after crash Also wonder what might have happened plane gas-powered instead electricpowered put fuel-soaked foam balsa bag final item wife operate Continued page 131 18 Model Aviation Dual Stnit Nose Gear 161 loistannel -5F3502 A/0801195 [~I4IIIiI{ 5/3260001405 AFOSO0 750S 1 Fults Tooling PO Box 95 Champagn IL 61820 Wa SUNSHINE HOBBY READY TO FLY Call 1-800-45-TO FLY ACCESSORIES INCLUDED PIPER CHEROKEE-40$12999 PIPER CHEROKEE-2510899 FOKKER E111-4011999 FANCY STICK-4011499 FANCY STICK-256999 CESSNA 172-2010899 CONOOR-40L11999 TERCEL-4512199 ENGINE NOT INCLUDED PIONEER CAR$6000 ENGINE INCLUDED 17221 South Western Avenue Gardena California 90247 CONTACT us FOR THIS MONTHS SPECIAL WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE Call 306 745 6394 10am -6 pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 PROTEC YOUR EYES IN COMFORT WITH AFFORDABLE HANDSOME SAFE! 6LASSES vision 15 important sense high-quality scratch resistant polycarbonate lens safety glasses must modelers Available clear gray dark green light green gradient mirrored gray lens Adjustable temples Wide view ANSI Z87l approved GREAT PRICES Iwant protect Iiny eyes wIth style aad comfort LlCIear-$725 eaL Gray-$855ea LLL Green-$855ea L]Dk Green-$8SSea ientMirror-$t05Oea ADDRESS crIYSTATEtZIP Send check er money order C&C Enterprises 141 Willa Dr Columbia SC 29209 SC Residents add 5% Sales Tax Safety/Preston Continued page 18 hobby store occasion have youngster bring 72-volt car pack shrink wrap melted off due over charging never given much thought un dl fire Now try explain possible dangers overcharging fast-chargers get info fast-charging its possible dangers Ill get back Another report fire occurred fly ing field described letter Richard Kaye Richards incident involved field box like used us contained battery power panel own words heres what happened few years ago purchased garden-variety power panel flight box major mail order firm Despite apparent dangers its de sign see similar units still readily avail able panel has glow plug driver am meter rheostat Im well versed elec tronics believe delivers 12 volts pulse bum out glow plug ammeter hooked up parallel mchrome wire coil serves resistor calibrate meter current delivery Until accident never imagined uncovered wire could potential source danger time happened using alli gator clips attach leads glow plug clips attached power cord staggered fashion avoid shorting have since learned wire leads sufficiently flexible short may still result power panel mounted box above storage bin clips shorted exposed nichrome wire heated sufficiently burn through fail some fuel-soaked pa per toweling lying bin finished flight amazed find smoky fire going field box time total loss explain got started Fuel rife report explosion fire modelers basement appeared May 3 issue Newsday Long Island NY newspaper Hank Anholzer modeler Valley Stream NY sent clipping report AMA HQ attention According report modeler assembling -propelled model air plane wife two children watched television another area familys finished basement explosion modeler ap peared flames knocked floor other family members rolled blanket Upon being taken hospital listed stable condition burns hands leg chest Fire officials believed cause explosion fumes variety fuels basement However ignition source reported appears modeler AMA mem ber intend follow up report try determine ignition source Meanwhile suggest check own workshop areas see flannnable liquids materials stored safe manneraway likely igni tion sources Super glue bold headiine wam ing notice appeared bulletin board plant major aircraft manufacturer old friend Clarence Ehrlich employed Clar ence able determine origin warning stated super glues contain cy anoacrylate anything repaired such glue subsequently heated will produce hydro gen cyanide gas specifically notice stated 5250 F gas will 10 times threshold limit fatal particu larly dangerous kitchenware has repaired placed oven discussed statement co-worker happens work area toxic materi als opinion hydrogen cyanide gas may released product repaired CyA glue heated would such small quantity would uniikely constitute health hazard let alone fatal anyone read ing column has information says other wise Id like hear As postscript elect drop line please use home address shown head column letters addressed AMA HQ get forwarded someone has take time perform task Have safe month aware energy contained battery packs Seely/Wei n reich Continued page 23 mic books model magazines course printed cheap paper simply disintegrated over years y became dealer 1967 opportunity buy out existing dealer wanted leave business fellow aeronautica dealer Blame small town Canadian border says Seely knew him stock urging wife took plunge Seely found out too surprisingly bank refused take old airplane books magazines collateral However able borrow needed $2000 bought collection published first list successful enough pay loan off seven months Now 20 years later Seelys old airplane books maga zines look like very good collateral indeed banks Since time has bought out several collectors dealers wanted exit business retire also buys estates other dealers have bought general collections interested aviation portions 1972 bought world-famous EL Sterne Aeronautica bookstore San Francisco Sterne re tired As dealer Blame Seely known Sterne years regards him mentor 1974 Seely bought out another big col lector dealer Richard Bueschel Chi cago some bargaining back forth end Bueschel sold Seely reasonable price because knew Seely knew prized collection would respected Getting Bueschel collection back home Olympia WA adventure itself Seely brother-in-law flew Chicago loaded THE LEADER IN COMPETITION N SERIES 100 \DIAPRICE 16 NEW PRO SERIES 3 II I NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN TH RU ST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCH PRICE 53/34 634 72833/456 833/4568 64566/7 94566/77 104566/7 106W6W 106EW Ii4677/7/78 115W 116EW 1167 124W 125W 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N5N 8I 67/7/6 SERIES 400C 86677/7 977/7/ W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 6 677 8 677 8 67 678 September 1988 131
Edition: Model Aviation - 1988/09
Page Numbers: 14, 16, 18, 131
John Preston Safety812 Corny First Northampion Sc NW Washington DC column provided address items concern regauing safety aspects model aviation activities Content column however opinion author does necessadly represent official position Academy Model Aeronautics Use extra caution recharging NiCd battery packs Power panel hazard danger overheating Super Glue joints BATTERY PACK FIRES June 1988 Salfety Comes First column mentioned couple incidents alleged NiCd batteries being recharged cause fires destroyed houses two model ers column asked anyone else ex perienced incident fire resulted Ni-Cds being charged Several modelers re sponded descriptions incidentsnone fortunately resulted loss home David Reagan modeler Englewood CO sent photograph receiver pack showing much charring heat shrink covering end together following letter Enclosed picture battery pack just happened take out airplane re charge evening As recall used about year performed problems No modifications other changes made it standard bat tery pack came radio being recharged charger supplied radio standard four-channel setup Once started burningand did burn open flame until whole end charredit impossible extinguish though out open workbench hesitate estimate damage should have occurred airplane checking charger later found everything normal have since used charger times other bat tery packs incident consider myself inexperienced model aviation since have building mod els over 30 years am copilot United Air lines have A&P license What am say ing consider myself well qualified care feeding batteries mechanical contrivances incident caught sur prise As say aint careful might learn something arned some thing guess Davids battery fire result some kind fault developing bat tery pack over its approximately year use Since Im mechanical engineer rather electrical engineer Im going try guess what fault nor occurred Like Da vid can say battery model time incident results could have very much serious As clear next letter John Ath erton Stockton CA charger problems too can result fires own words Johns experi ence follows wanted hear about fires such battery chargers Although Im airplane nut wife likes trucks RC cars Thats ended up truck charger As per instruc tions discharged six-cell battery pack com pletely before recharging turned switch Charge timer 15 minutes turned TV sat back became en grossed movieforgetting about charger As well can figure chargers timer dial became stock 15-minute mark quite some time sure long next thing knew like Vietnam over again think yelled Incoming several loud bangs pieces flying over house piece carpet truck sitting caught fire should noted batteries being charged still truck cell flew Out truck went through box charger sitting broke side chargers plastic case no other damage other door truck holds batter ies place warped heat swept up carbon other pieces batteries week afterward fortu nate now very careful set another timer chimes remind us charger Johns letter reminded charging inci dent experienced number years ago RC equipment manufacturers first intro duced dual-rate chargers connected receiver pack charger set High Rate As recall 20 minutes recommended dura tion charging rate guessed promptly forgot about think must have changed mind about going flying day something Anyway 24 hours later remembered what done previous day rushed down basement correct error hot receiver pack moral story al ways what John Atherton now does Buy timer chime other type alarm hu man memory infallible letter George Erdel Jacksonville FL pointed Out self-incineration batteries being charged confined used RC models letter follows just read article Ni-Cd battery charg ing fires problem can encountered model aircraft also prob lem full-scale aircraft condition known Continued page 16 14 Model Aviation CRA4iD TO 17 WANT THIS BATTERY PACK CVE--EASY1 ORV/ILLTI4IS DQ ChicAqo ModEl Hobby Show R/C Planes Cars Boats Trains & Games October 14-1619880 OHare Expo Center ago Illinois Hours Friday October144pm 10 pm Saturday October1510 am 6 pm Sunday October1610 am 5 pm Admission Adults$500 Children 6 12$250 Children 5 underFree Sponsored Radio Control Hobby Trade Association RCHTA CoSponsored Model Railroad Industry Association MRIA See 350 &hi bits Hottest New Model & Hobby Equipment PLUS Boat Pond Track il Store l Railroad Demonstrations NEW 88 AMA Model Display Open Trade Only October 13 10 am 6 pm & October 14 10 am 4 pm thermal runaway process goes like battery charging naturaliy gets warm rise temperature also get corresponding rise internal resistabce turn causes another rise temperature caus ing another increase internal resistance As can see continuous cycle will end battery destroys itself selfincineration important monitor charging process assure maximum safe charging current exceeded may take longer charge standard trickle charger comes radio gearbut much safer rapid charger used should done batteries approved manufacturer fast charging Thermal runaway can occur during charging battery Without charging cur rent being present whole cycle comes halt batteries feel hot touch during charging should immediately discon nected charging source have taught young fliers periodically check battery temperature charger have felt HOT Ni-Cd fast-charging video camcorder battery have seen hot can get wife checks has properly instructed disconnect temperature starts rise problem has cause several fa tal accidents turbine-powered aircraft avi ation industry has installed temperature sensors batteries monitored cockpit temperature gauges annunciators good example yet another similar ity between Scale models full-scale brothers Continued page 18 INTRODUCING rHE \ELET/L7L/TE FOR 020035-050 ELECTRIC S 30 AREA 257 CHANNELS 2-3 30TH 30 FLYrNO WT TO 3002 Instantly removable in-cycle gear wheels Pra-built boom landing gaar sockata & push-rode Aatro motor mount cobalt adapter Pra-formed leading adgea knotchad trailing edgea AirframeS oz. anding gear Perfect performanca 020-035-36 cysiams Maximum duration & glider-like motor-off flight cheracteriatica ARF build ft cover wing elee completely built jell surfacea hingad . *7996 wlo gear p696 gear ladd $3 ahipping TX rea add 6% ealee taxI Designed built Electric Modal Co 218 Oyster k r Lend TX 77479 242-6229 Souths rgest inventory astro motors ft acceasorien Need help sefth electtc alrgieee alder Ask br Don 16 Model Aviation Fourth Annual CAhbI1 RIC Idle-Bar Glow Plugs Long Short Only $189 BLUES RRCAT getting down get protected RRCATT mask Safety Plus mask will eliminate RRCArT fumes epoxy polyester resin vapors air breath Lightweight easy breathing comfortable CA Mask $1595 Paint Mask $2045 See hobby dealer first doesnt have what need order direct Safety Plus PO Box 1173 Dept 12M Clinton Mississippi 39056 Call toll free 1-800-842-7233 Mississippi dial 601-924-9640 VISA MASTERCARD accepted COD add $250 shipping handling included Dealer Inquiries Invited Also. Traditional line nonidle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates PO Box 151 ce 7948 Wayne NJ 07470 BALSA SHEETS 36 45 30 1/162 33 3132 2 40 1/8 n2 43 31162 49 114 2 56 1/323 37 1/203 37 1/163 3749 31 3/323 4458 27 1/8 3 5471 45 3/163 628255 1/4 9561 5/163 65 110 3/8 n388 12471 1/2 3 110 155 34 n3 165 191 1/104 59 76 48 3/324 70 94 56 1/8 n4 80 106 66 3/164 93 122 75 1144110 134 64 3/84165 225 139 /2 4 225 261 MATCHED SHEETS 42 3/324100 1/84105 3/164120 1/44131 BALSA STICKS 3648 1/18 1/4 09 116 3/8 10 116 1/2 14 3/32 14 10 3/32 3/9 12 332 12 16 1/6 10 08 1/8 381218 1/9 121024 3163/161116 316 3/81720 316 1/22230 14 141624 1/4 381926 /4 122130 1/4 3/43444 1/4 14555 5/165/162128 3/8 3/82737 3/8 1/23246 3/0 3/44255 36 15270 12 123653 12 3/44662 12 15978 5/6 564865 3/4 90 w BALSA TRIANGLES 36 4425 383830 2235 343445 55 SAL BA PLANKS 36 85 250 3200 4280 11/23275 1124360 22225 23325 24435 33495 34688124282 TAPERED SHEETS36 1/42 65TRAILING EDGE36 143 8514132 382 695/181 1439 3/83 993811246 1/2312012270 LONE STAR EPOXY 9Lot800 Sm,588 15mm588 30mm599 INSTANT GLUE 1 0 Think299 1 cc TSn299 2, TSi,050 2cc rh/n550 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% you are serious modeler want performance must try 4-6 lb balsa BASSWOOD48 3/163/1626 3/181/430 3/163/838 3/181/246 3183/460 1/41442 1/43/949 143/480 3/93/960 3/91/270 3/93/490 1/21/200 SUNDLE DEALS 39-1/18338685 201/164381020 203/323368411 15-3/32436950 15-1/8336715 1018436675 15316336900 103/16438810 101/4336630 1014436990 1039336850 53/8436825 51/2336540 51/24391000 10332448845 51/8440485 03/164 48585 51/4448825 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 18 1/81522 18 141824 19 3/82029 316 3162534 1/4 1/43145 1/4 3/83650 1/4 1/24565 3/8 3/84563 3/8 1/25570 1/2 1/20088 1/23/488 99 SPRUCE TRIANGLES 36 3/83/8 40 1/21/2 61 343/4 77 LITEPLS 48 1/86100 1/812300 1/412475 HARD MAPLE 1/43/8 3/8 3/8 3812 3/834 123/4 40 40 50 58 66 BIRCH DOWELS36 1/909 31611 1414 51625 3832 3PLYBIRCH48 16412620 1/3212449 1/1612455 1/912450 S PLY BIRCH 3/32 12 1/812 3/16 12 1/412 3/8 12 1/212 48 999 828 825 825 725 900 GROOVED LG MOUNTS l2lachaa 393/4/18/40 3/83/4/5/32/40 1/23/4/316/45 Cost 48 Handling charge W pay UPS Add $250 COD $300 extra PP APO FPO Statee accept V188 Master Card personal checks COO 6W Ia To, US carrency onip Mini,, Wood Order $1000 LIGHT 4-6 LB WOOD36 132349 120349 118349 3/323S6 1/8367 316376 14395 3/83115 1/23139 3/43220 13300 1/16478 332 194100 3/164117 144139 384207 6tg may greater likelihood battery-related fire during charging operations letter George Sommerer Rock Hilt SC modeler describes another type fire caused models battery pack flying electric-powered airplane too windy day downwind turn just af ter takeoff resulted unscheduled uncon trolled landing sounds better crash impact severe enough separate re ceiver battery wires connector re ceiver pack 500 mAb fully charged since first flight day gathered pieces balsa foam bat teries electric motor etc put pa per bag bag placed back pickup truck wife went about business watching other club members fly cannot tell exact time longer 10 minutes noticed paper bag smoldering about burst flames dumped bag Out stepped smold ering pieces found culprit wires pulled out connector plug receiver pack touched shorted pack creating enough heat start fire consider myself conscientious person either overlooked shorting dismissed mind being anything serious did fact torn out have minor consequences ponder what could have happened bag put cab truck left flying field right after crash Also wonder what might have happened plane gas-powered instead electricpowered put fuel-soaked foam balsa bag final item wife operate Continued page 131 18 Model Aviation Dual Stnit Nose Gear 161 loistannel -5F3502 A/0801195 [~I4IIIiI{ 5/3260001405 AFOSO0 750S 1 Fults Tooling PO Box 95 Champagn IL 61820 Wa SUNSHINE HOBBY READY TO FLY Call 1-800-45-TO FLY ACCESSORIES INCLUDED PIPER CHEROKEE-40$12999 PIPER CHEROKEE-2510899 FOKKER E111-4011999 FANCY STICK-4011499 FANCY STICK-256999 CESSNA 172-2010899 CONOOR-40L11999 TERCEL-4512199 ENGINE NOT INCLUDED PIONEER CAR$6000 ENGINE INCLUDED 17221 South Western Avenue Gardena California 90247 CONTACT us FOR THIS MONTHS SPECIAL WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE Call 306 745 6394 10am -6 pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 PROTEC YOUR EYES IN COMFORT WITH AFFORDABLE HANDSOME SAFE! 6LASSES vision 15 important sense high-quality scratch resistant polycarbonate lens safety glasses must modelers Available clear gray dark green light green gradient mirrored gray lens Adjustable temples Wide view ANSI Z87l approved GREAT PRICES Iwant protect Iiny eyes wIth style aad comfort LlCIear-$725 eaL Gray-$855ea LLL Green-$855ea L]Dk Green-$8SSea ientMirror-$t05Oea ADDRESS crIYSTATEtZIP Send check er money order C&C Enterprises 141 Willa Dr Columbia SC 29209 SC Residents add 5% Sales Tax Safety/Preston Continued page 18 hobby store occasion have youngster bring 72-volt car pack shrink wrap melted off due over charging never given much thought un dl fire Now try explain possible dangers overcharging fast-chargers get info fast-charging its possible dangers Ill get back Another report fire occurred fly ing field described letter Richard Kaye Richards incident involved field box like used us contained battery power panel own words heres what happened few years ago purchased garden-variety power panel flight box major mail order firm Despite apparent dangers its de sign see similar units still readily avail able panel has glow plug driver am meter rheostat Im well versed elec tronics believe delivers 12 volts pulse bum out glow plug ammeter hooked up parallel mchrome wire coil serves resistor calibrate meter current delivery Until accident never imagined uncovered wire could potential source danger time happened using alli gator clips attach leads glow plug clips attached power cord staggered fashion avoid shorting have since learned wire leads sufficiently flexible short may still result power panel mounted box above storage bin clips shorted exposed nichrome wire heated sufficiently burn through fail some fuel-soaked pa per toweling lying bin finished flight amazed find smoky fire going field box time total loss explain got started Fuel rife report explosion fire modelers basement appeared May 3 issue Newsday Long Island NY newspaper Hank Anholzer modeler Valley Stream NY sent clipping report AMA HQ attention According report modeler assembling -propelled model air plane wife two children watched television another area familys finished basement explosion modeler ap peared flames knocked floor other family members rolled blanket Upon being taken hospital listed stable condition burns hands leg chest Fire officials believed cause explosion fumes variety fuels basement However ignition source reported appears modeler AMA mem ber intend follow up report try determine ignition source Meanwhile suggest check own workshop areas see flannnable liquids materials stored safe manneraway likely igni tion sources Super glue bold headiine wam ing notice appeared bulletin board plant major aircraft manufacturer old friend Clarence Ehrlich employed Clar ence able determine origin warning stated super glues contain cy anoacrylate anything repaired such glue subsequently heated will produce hydro gen cyanide gas specifically notice stated 5250 F gas will 10 times threshold limit fatal particu larly dangerous kitchenware has repaired placed oven discussed statement co-worker happens work area toxic materi als opinion hydrogen cyanide gas may released product repaired CyA glue heated would such small quantity would uniikely constitute health hazard let alone fatal anyone read ing column has information says other wise Id like hear As postscript elect drop line please use home address shown head column letters addressed AMA HQ get forwarded someone has take time perform task Have safe month aware energy contained battery packs Seely/Wei n reich Continued page 23 mic books model magazines course printed cheap paper simply disintegrated over years y became dealer 1967 opportunity buy out existing dealer wanted leave business fellow aeronautica dealer Blame small town Canadian border says Seely knew him stock urging wife took plunge Seely found out too surprisingly bank refused take old airplane books magazines collateral However able borrow needed $2000 bought collection published first list successful enough pay loan off seven months Now 20 years later Seelys old airplane books maga zines look like very good collateral indeed banks Since time has bought out several collectors dealers wanted exit business retire also buys estates other dealers have bought general collections interested aviation portions 1972 bought world-famous EL Sterne Aeronautica bookstore San Francisco Sterne re tired As dealer Blame Seely known Sterne years regards him mentor 1974 Seely bought out another big col lector dealer Richard Bueschel Chi cago some bargaining back forth end Bueschel sold Seely reasonable price because knew Seely knew prized collection would respected Getting Bueschel collection back home Olympia WA adventure itself Seely brother-in-law flew Chicago loaded THE LEADER IN COMPETITION N SERIES 100 \DIAPRICE 16 NEW PRO SERIES 3 II I NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN TH RU ST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCH PRICE 53/34 634 72833/456 833/4568 64566/7 94566/77 104566/7 106W6W 106EW Ii4677/7/78 115W 116EW 1167 124W 125W 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N5N 8I 67/7/6 SERIES 400C 86677/7 977/7/ W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 6 677 8 677 8 67 678 September 1988 131
Edition: Model Aviation - 1988/09
Page Numbers: 14, 16, 18, 131
John Preston Safety812 Corny First Northampion Sc NW Washington DC column provided address items concern regauing safety aspects model aviation activities Content column however opinion author does necessadly represent official position Academy Model Aeronautics Use extra caution recharging NiCd battery packs Power panel hazard danger overheating Super Glue joints BATTERY PACK FIRES June 1988 Salfety Comes First column mentioned couple incidents alleged NiCd batteries being recharged cause fires destroyed houses two model ers column asked anyone else ex perienced incident fire resulted Ni-Cds being charged Several modelers re sponded descriptions incidentsnone fortunately resulted loss home David Reagan modeler Englewood CO sent photograph receiver pack showing much charring heat shrink covering end together following letter Enclosed picture battery pack just happened take out airplane re charge evening As recall used about year performed problems No modifications other changes made it standard bat tery pack came radio being recharged charger supplied radio standard four-channel setup Once started burningand did burn open flame until whole end charredit impossible extinguish though out open workbench hesitate estimate damage should have occurred airplane checking charger later found everything normal have since used charger times other bat tery packs incident consider myself inexperienced model aviation since have building mod els over 30 years am copilot United Air lines have A&P license What am say ing consider myself well qualified care feeding batteries mechanical contrivances incident caught sur prise As say aint careful might learn something arned some thing guess Davids battery fire result some kind fault developing bat tery pack over its approximately year use Since Im mechanical engineer rather electrical engineer Im going try guess what fault nor occurred Like Da vid can say battery model time incident results could have very much serious As clear next letter John Ath erton Stockton CA charger problems too can result fires own words Johns experi ence follows wanted hear about fires such battery chargers Although Im airplane nut wife likes trucks RC cars Thats ended up truck charger As per instruc tions discharged six-cell battery pack com pletely before recharging turned switch Charge timer 15 minutes turned TV sat back became en grossed movieforgetting about charger As well can figure chargers timer dial became stock 15-minute mark quite some time sure long next thing knew like Vietnam over again think yelled Incoming several loud bangs pieces flying over house piece carpet truck sitting caught fire should noted batteries being charged still truck cell flew Out truck went through box charger sitting broke side chargers plastic case no other damage other door truck holds batter ies place warped heat swept up carbon other pieces batteries week afterward fortu nate now very careful set another timer chimes remind us charger Johns letter reminded charging inci dent experienced number years ago RC equipment manufacturers first intro duced dual-rate chargers connected receiver pack charger set High Rate As recall 20 minutes recommended dura tion charging rate guessed promptly forgot about think must have changed mind about going flying day something Anyway 24 hours later remembered what done previous day rushed down basement correct error hot receiver pack moral story al ways what John Atherton now does Buy timer chime other type alarm hu man memory infallible letter George Erdel Jacksonville FL pointed Out self-incineration batteries being charged confined used RC models letter follows just read article Ni-Cd battery charg ing fires problem can encountered model aircraft also prob lem full-scale aircraft condition known Continued page 16 14 Model Aviation CRA4iD TO 17 WANT THIS BATTERY PACK CVE--EASY1 ORV/ILLTI4IS DQ ChicAqo ModEl Hobby Show R/C Planes Cars Boats Trains & Games October 14-1619880 OHare Expo Center ago Illinois Hours Friday October144pm 10 pm Saturday October1510 am 6 pm Sunday October1610 am 5 pm Admission Adults$500 Children 6 12$250 Children 5 underFree Sponsored Radio Control Hobby Trade Association RCHTA CoSponsored Model Railroad Industry Association MRIA See 350 &hi bits Hottest New Model & Hobby Equipment PLUS Boat Pond Track il Store l Railroad Demonstrations NEW 88 AMA Model Display Open Trade Only October 13 10 am 6 pm & October 14 10 am 4 pm thermal runaway process goes like battery charging naturaliy gets warm rise temperature also get corresponding rise internal resistabce turn causes another rise temperature caus ing another increase internal resistance As can see continuous cycle will end battery destroys itself selfincineration important monitor charging process assure maximum safe charging current exceeded may take longer charge standard trickle charger comes radio gearbut much safer rapid charger used should done batteries approved manufacturer fast charging Thermal runaway can occur during charging battery Without charging cur rent being present whole cycle comes halt batteries feel hot touch during charging should immediately discon nected charging source have taught young fliers periodically check battery temperature charger have felt HOT Ni-Cd fast-charging video camcorder battery have seen hot can get wife checks has properly instructed disconnect temperature starts rise problem has cause several fa tal accidents turbine-powered aircraft avi ation industry has installed temperature sensors batteries monitored cockpit temperature gauges annunciators good example yet another similar ity between Scale models full-scale brothers Continued page 18 INTRODUCING rHE \ELET/L7L/TE FOR 020035-050 ELECTRIC S 30 AREA 257 CHANNELS 2-3 30TH 30 FLYrNO WT TO 3002 Instantly removable in-cycle gear wheels Pra-built boom landing gaar sockata & push-rode Aatro motor mount cobalt adapter Pra-formed leading adgea knotchad trailing edgea AirframeS oz. anding gear Perfect performanca 020-035-36 cysiams Maximum duration & glider-like motor-off flight cheracteriatica ARF build ft cover wing elee completely built jell surfacea hingad . *7996 wlo gear p696 gear ladd $3 ahipping TX rea add 6% ealee taxI Designed built Electric Modal Co 218 Oyster k r Lend TX 77479 242-6229 Souths rgest inventory astro motors ft acceasorien Need help sefth electtc alrgieee alder Ask br Don 16 Model Aviation Fourth Annual CAhbI1 RIC Idle-Bar Glow Plugs Long Short Only $189 BLUES RRCAT getting down get protected RRCATT mask Safety Plus mask will eliminate RRCArT fumes epoxy polyester resin vapors air breath Lightweight easy breathing comfortable CA Mask $1595 Paint Mask $2045 See hobby dealer first doesnt have what need order direct Safety Plus PO Box 1173 Dept 12M Clinton Mississippi 39056 Call toll free 1-800-842-7233 Mississippi dial 601-924-9640 VISA MASTERCARD accepted COD add $250 shipping handling included Dealer Inquiries Invited Also. Traditional line nonidle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates PO Box 151 ce 7948 Wayne NJ 07470 BALSA SHEETS 36 45 30 1/162 33 3132 2 40 1/8 n2 43 31162 49 114 2 56 1/323 37 1/203 37 1/163 3749 31 3/323 4458 27 1/8 3 5471 45 3/163 628255 1/4 9561 5/163 65 110 3/8 n388 12471 1/2 3 110 155 34 n3 165 191 1/104 59 76 48 3/324 70 94 56 1/8 n4 80 106 66 3/164 93 122 75 1144110 134 64 3/84165 225 139 /2 4 225 261 MATCHED SHEETS 42 3/324100 1/84105 3/164120 1/44131 BALSA STICKS 3648 1/18 1/4 09 116 3/8 10 116 1/2 14 3/32 14 10 3/32 3/9 12 332 12 16 1/6 10 08 1/8 381218 1/9 121024 3163/161116 316 3/81720 316 1/22230 14 141624 1/4 381926 /4 122130 1/4 3/43444 1/4 14555 5/165/162128 3/8 3/82737 3/8 1/23246 3/0 3/44255 36 15270 12 123653 12 3/44662 12 15978 5/6 564865 3/4 90 w BALSA TRIANGLES 36 4425 383830 2235 343445 55 SAL BA PLANKS 36 85 250 3200 4280 11/23275 1124360 22225 23325 24435 33495 34688124282 TAPERED SHEETS36 1/42 65TRAILING EDGE36 143 8514132 382 695/181 1439 3/83 993811246 1/2312012270 LONE STAR EPOXY 9Lot800 Sm,588 15mm588 30mm599 INSTANT GLUE 1 0 Think299 1 cc TSn299 2, TSi,050 2cc rh/n550 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% you are serious modeler want performance must try 4-6 lb balsa BASSWOOD48 3/163/1626 3/181/430 3/163/838 3/181/246 3183/460 1/41442 1/43/949 143/480 3/93/960 3/91/270 3/93/490 1/21/200 SUNDLE DEALS 39-1/18338685 201/164381020 203/323368411 15-3/32436950 15-1/8336715 1018436675 15316336900 103/16438810 101/4336630 1014436990 1039336850 53/8436825 51/2336540 51/24391000 10332448845 51/8440485 03/164 48585 51/4448825 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 18 1/81522 18 141824 19 3/82029 316 3162534 1/4 1/43145 1/4 3/83650 1/4 1/24565 3/8 3/84563 3/8 1/25570 1/2 1/20088 1/23/488 99 SPRUCE TRIANGLES 36 3/83/8 40 1/21/2 61 343/4 77 LITEPLS 48 1/86100 1/812300 1/412475 HARD MAPLE 1/43/8 3/8 3/8 3812 3/834 123/4 40 40 50 58 66 BIRCH DOWELS36 1/909 31611 1414 51625 3832 3PLYBIRCH48 16412620 1/3212449 1/1612455 1/912450 S PLY BIRCH 3/32 12 1/812 3/16 12 1/412 3/8 12 1/212 48 999 828 825 825 725 900 GROOVED LG MOUNTS l2lachaa 393/4/18/40 3/83/4/5/32/40 1/23/4/316/45 Cost 48 Handling charge W pay UPS Add $250 COD $300 extra PP APO FPO Statee accept V188 Master Card personal checks COO 6W Ia To, US carrency onip Mini,, Wood Order $1000 LIGHT 4-6 LB WOOD36 132349 120349 118349 3/323S6 1/8367 316376 14395 3/83115 1/23139 3/43220 13300 1/16478 332 194100 3/164117 144139 384207 6tg may greater likelihood battery-related fire during charging operations letter George Sommerer Rock Hilt SC modeler describes another type fire caused models battery pack flying electric-powered airplane too windy day downwind turn just af ter takeoff resulted unscheduled uncon trolled landing sounds better crash impact severe enough separate re ceiver battery wires connector re ceiver pack 500 mAb fully charged since first flight day gathered pieces balsa foam bat teries electric motor etc put pa per bag bag placed back pickup truck wife went about business watching other club members fly cannot tell exact time longer 10 minutes noticed paper bag smoldering about burst flames dumped bag Out stepped smold ering pieces found culprit wires pulled out connector plug receiver pack touched shorted pack creating enough heat start fire consider myself conscientious person either overlooked shorting dismissed mind being anything serious did fact torn out have minor consequences ponder what could have happened bag put cab truck left flying field right after crash Also wonder what might have happened plane gas-powered instead electricpowered put fuel-soaked foam balsa bag final item wife operate Continued page 131 18 Model Aviation Dual Stnit Nose Gear 161 loistannel -5F3502 A/0801195 [~I4IIIiI{ 5/3260001405 AFOSO0 750S 1 Fults Tooling PO Box 95 Champagn IL 61820 Wa SUNSHINE HOBBY READY TO FLY Call 1-800-45-TO FLY ACCESSORIES INCLUDED PIPER CHEROKEE-40$12999 PIPER CHEROKEE-2510899 FOKKER E111-4011999 FANCY STICK-4011499 FANCY STICK-256999 CESSNA 172-2010899 CONOOR-40L11999 TERCEL-4512199 ENGINE NOT INCLUDED PIONEER CAR$6000 ENGINE INCLUDED 17221 South Western Avenue Gardena California 90247 CONTACT us FOR THIS MONTHS SPECIAL WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE Call 306 745 6394 10am -6 pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 PROTEC YOUR EYES IN COMFORT WITH AFFORDABLE HANDSOME SAFE! 6LASSES vision 15 important sense high-quality scratch resistant polycarbonate lens safety glasses must modelers Available clear gray dark green light green gradient mirrored gray lens Adjustable temples Wide view ANSI Z87l approved GREAT PRICES Iwant protect Iiny eyes wIth style aad comfort LlCIear-$725 eaL Gray-$855ea LLL Green-$855ea L]Dk Green-$8SSea ientMirror-$t05Oea ADDRESS crIYSTATEtZIP Send check er money order C&C Enterprises 141 Willa Dr Columbia SC 29209 SC Residents add 5% Sales Tax Safety/Preston Continued page 18 hobby store occasion have youngster bring 72-volt car pack shrink wrap melted off due over charging never given much thought un dl fire Now try explain possible dangers overcharging fast-chargers get info fast-charging its possible dangers Ill get back Another report fire occurred fly ing field described letter Richard Kaye Richards incident involved field box like used us contained battery power panel own words heres what happened few years ago purchased garden-variety power panel flight box major mail order firm Despite apparent dangers its de sign see similar units still readily avail able panel has glow plug driver am meter rheostat Im well versed elec tronics believe delivers 12 volts pulse bum out glow plug ammeter hooked up parallel mchrome wire coil serves resistor calibrate meter current delivery Until accident never imagined uncovered wire could potential source danger time happened using alli gator clips attach leads glow plug clips attached power cord staggered fashion avoid shorting have since learned wire leads sufficiently flexible short may still result power panel mounted box above storage bin clips shorted exposed nichrome wire heated sufficiently burn through fail some fuel-soaked pa per toweling lying bin finished flight amazed find smoky fire going field box time total loss explain got started Fuel rife report explosion fire modelers basement appeared May 3 issue Newsday Long Island NY newspaper Hank Anholzer modeler Valley Stream NY sent clipping report AMA HQ attention According report modeler assembling -propelled model air plane wife two children watched television another area familys finished basement explosion modeler ap peared flames knocked floor other family members rolled blanket Upon being taken hospital listed stable condition burns hands leg chest Fire officials believed cause explosion fumes variety fuels basement However ignition source reported appears modeler AMA mem ber intend follow up report try determine ignition source Meanwhile suggest check own workshop areas see flannnable liquids materials stored safe manneraway likely igni tion sources Super glue bold headiine wam ing notice appeared bulletin board plant major aircraft manufacturer old friend Clarence Ehrlich employed Clar ence able determine origin warning stated super glues contain cy anoacrylate anything repaired such glue subsequently heated will produce hydro gen cyanide gas specifically notice stated 5250 F gas will 10 times threshold limit fatal particu larly dangerous kitchenware has repaired placed oven discussed statement co-worker happens work area toxic materi als opinion hydrogen cyanide gas may released product repaired CyA glue heated would such small quantity would uniikely constitute health hazard let alone fatal anyone read ing column has information says other wise Id like hear As postscript elect drop line please use home address shown head column letters addressed AMA HQ get forwarded someone has take time perform task Have safe month aware energy contained battery packs Seely/Wei n reich Continued page 23 mic books model magazines course printed cheap paper simply disintegrated over years y became dealer 1967 opportunity buy out existing dealer wanted leave business fellow aeronautica dealer Blame small town Canadian border says Seely knew him stock urging wife took plunge Seely found out too surprisingly bank refused take old airplane books magazines collateral However able borrow needed $2000 bought collection published first list successful enough pay loan off seven months Now 20 years later Seelys old airplane books maga zines look like very good collateral indeed banks Since time has bought out several collectors dealers wanted exit business retire also buys estates other dealers have bought general collections interested aviation portions 1972 bought world-famous EL Sterne Aeronautica bookstore San Francisco Sterne re tired As dealer Blame Seely known Sterne years regards him mentor 1974 Seely bought out another big col lector dealer Richard Bueschel Chi cago some bargaining back forth end Bueschel sold Seely reasonable price because knew Seely knew prized collection would respected Getting Bueschel collection back home Olympia WA adventure itself Seely brother-in-law flew Chicago loaded THE LEADER IN COMPETITION N SERIES 100 \DIAPRICE 16 NEW PRO SERIES 3 II I NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN TH RU ST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCH PRICE 53/34 634 72833/456 833/4568 64566/7 94566/77 104566/7 106W6W 106EW Ii4677/7/78 115W 116EW 1167 124W 125W 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N5N 8I 67/7/6 SERIES 400C 86677/7 977/7/ W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 6 677 8 677 8 67 678 September 1988 131