inJohn Preston__________________ Choosing flightbox fire extin guisher Use caution hightech materials An old flyingsafety problem strikes again FOLLOW-UP explosions fire Oc tober 1986 issue column carried reports explosions fires associated glow fuel cans Several readers issue sent letters offered some explanations concerning hazards advised minimize possi bility happening First let quote letter Jim Marble modeler Aurora IN some comments fuel can fire basement modeler left flying field because impending thunderstorm dont keep back issues magazines incident involved almost empty fuel can modeler attempted unscrew cap refill basement workshop resulted ig nition fuel vapor can caused severe second-degree burns hand Jim following say Nothing will burn unless first vaporized Any organic substance will vaporize 1000 F less classified flammable Above 1000 F called combustible such wood An empty nearly-empty gas can likely explode full because larger air space allows fuel vapors accumulate carpet victim standing key culprit explosion modeler moved rubbersoled shoes carpet built up static charge body discharged himself top metal can triggering explosion thunderstorm should have prevented accident increasing humidity reducing possi bility static discharge carpet must have very dry remaining fuel can did burn because explosion removed oxy gen can order fuel vapor bum must have mixture 15% fuel vapor 85% air give take 5% Did ever see John Wayne movie Hell Fire think called Hell Fighters JDP used dynamite extinguish gas well fire example controlled explosions being used remove oxygen fight fire Jims explanation cause fuel-can ignition seems logical other com ment caution may have carpeted workshop area ever alert possibility spark due discharge static electricity build-up handling fuel cans especially metal cans Another letter subject fuel-can ex plosions came Ernie Razzano Florida modeler Ernies letter accompanied some photographs flight box arrangement designed minimize chance explosion fire caused proximity ignition source battery fuel supply Since Ernie builder Giant Scale models fuel gasoline also carries fuel models smoke systeris flight box bet ter idea separate fuel battery using two separate flight boxes box con tains 12-volt battery starter allimportant fire extinguisher phone jack plug provided connect power source two automobile diaphram-type fuel pumps installed other box along fuel cans believe Ernies two-flight-box arrange ment definite plus minimizing chance fuel can explosion fire Another solution might less expensive would attach manually-operated fuel pump fuel can always carry separately flight box would battery power glow plug engine starter etc Fire extinguishers Ernie Razzanos letter men tioned flight boxes carries allimportant fire extinguisher Another modeler Russ Larson responded column about fuel fires explosions enclosed letter copy article Aviation Safety June 1986 issue subject different types fire J U- extinguishers might carried full-scale general-aviation-type aircraft handle gas oil electrical fire article concluded Halon fire extin guisher way go Two other types fire extinguishers might encountered light aircraft cockpit dry-chemical type CO2 aircraft cockpit both types may produce fog obscures pilots vision incidents record discharge such extinguishers aircraft cockpit re sulted crash because loss vision pilot Pilots model aircraft dont have worry about vision problems fire extinguishers discharged extinguish model aircraft fire However might still want consider purchase Halon extinguisher inclusion flight box because other reasons Aviation Safety article following say about dry chemical fire extinguishers Yet another problem corrosive nature powder discharge applications notably computer rooms dry chemical extin guishers have bannednot because dont put out fire because will de stroy equipment protecting Although should never considered rea son let fire go unfought person using dry chemical extinguisher aircraft panel can practically count avionics rendered Continued page 18 THA14$15 Foi 114 EhONTPATio 16 Model Aviation Satisfaction Guaranteed Direct Only BALSA SHUTS 36 48 3O 1/18233 3/32240 1/8243 3/16249 114 256 1/32337 1/20337 1/163374931 3/323445837 l/8 3547145 3/183828255 1/4 561 5/16395 3/9 38912471 3/43165 1/164567649 3/324709456 1/849010666 3/1649312275 1/4411013494 3/84165225 1/24225261 MATCHED SHEETS 42 3/324100 1/84109 3/164120 1/44121 5A3A 3AT * WE ARE SHOOTING DOWN HIGH BALSA PRICES OM CUT CONTEST BALSA Sheets Piece ed Close Tolerances WITH SUPER QUALITYAAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa LIGHT4-6 LB BASSWOOD 48 PVHESTICKS 36 48 HARD MAPLE 18 3/163/18261/81/813 171/43/840 BALSATRIANGLES35 WOOD363/181/4301/81/41623 I3/83/849 1/41/4251/323493/163/8381/83/820 273/81/260 3/83/8301/203493/16 1/2463183/1617 243/83/456 1/21/2351/16349 3/163/4603/163823 321/23/468 3/43/4453/323561/41/4423/16 1/230 40 1156 1/83671/43/8491/41/426 APLAHKS 3/163761/43/4801/43/830 42BIRCH DO WELS36 1/43853/83/8801/4 1/234 471/809 11853/831153/91/2703/83/627 523/1611 121561/231393/83/490 13200 3/43220 1/21/2901/414 5/1625 14290133001/23/4100SPRJCESTICKS3645 3/832 11/232751/16478 1/8 1/8 15 11/243603/32491 1/8 1/4 18 24 222251/84100 233253/164117BUHDLEDEALS1/8 3/920 293PLYBIRCH 48 24435I/44139201/6336 6903/l83/1625 34 33495 3/84207201/16430 10201/4 1431 1451/6412525 1/3212425 34688 I/2428220-3/323348401/4 3/834 1/1012435 15-3/32434oss 3/845 631/912460 TAPEREDSHEETS 36151/83387153/8 1/25670 1/42 65TRAILING [DOE 36101/84361/2 1/26090 1/4385 1/4132153/163361/2 3/460 89 5fty59f 48 3/8268 5/1611/4103/16434810 3/8396 3/811/246101/4336630 12570 1/812585 1/23120 1/2270101/4436890 SPRVCETRIAHGLES 36 31612595 103/83308563/83/8451/412600 53/84346251/21/261 51/2334540343/477 LONE STAR EPOXYINSTANT CL UE51/2434855 'BALSA HOT L Ll 8851 ,Thek289103/32440845GROOVEDLGMOIJHTS 5,,59810 Thi29851/8440485121chs CaN 806743-639410, 6pntCentrolrme15,,5902 Thik55653/18448585 PLS483/83/4/1/8/40 30,,55655651/4440625 j 1/961563/83/4/5/32/40 LONE STAR MODELS1/8123001/23/4/3/16/45 123 57th St Lubbock TX 79412Handling Charge$300 pay UPS Add $200 COD $300 extra PP APO FPO accept Via Master Card personal checks COO 4-1/8% las inTea US currency Mnnun Order $1000 useless aircraft salvager refused let report ers try dry chemical extinguisher wrecked fuselage because chemical would have cor roded remains worthless junk short currently carrying dry chemical extinguisher flight box its use model may successfully put out firebut may result destruction due corrosion radio equipment So leaves choice CO2 extinguisher containing Halon Again quote Aviation Safety article Another special hazard CO2 units explosions extinguisher gets too hot sitting enclosed area such aircraft out ramp sun safety disc should rupture empty extinguisher before ex plodes according publication National Association Fire Equipment Dis tributors NAFED CO2 extinguishers may ex plode anywaysometimes because defects cylinders sometimes because double safety discs have accidentally installed NAFED cites case CO2 cylinder corroded internally exploded auto repair shop bottom extinguisher sliced completely through both sides auto chassis large upper portion skyrocketed mile away after tearing through heavy wood-truss roof C02-type fire extinguisher hardly likely reach temperature stored field box would result explosion other hand stored car parked sun just might reach temperature similar airplane cockpit similar environment So Halon might best bet comes selection extinguisher clusion flight box So what Halon extinguisher Can also explode stored hot automobile direct sunlight Again quote Aviation Safety arti cle can explode like CO2 extinguishers might according several industry people spoke Amerex manufacturer Halon extinguishers explained extinguisher con tainers tested about four times pressure experience normal circumstances reach pressure would require temperatures around 280 Fahrenheit likely encountered uses am far being considered expert comes choice fore extinguisher what read hear Halon extin guisher would definitely choice extin guish fire model airplane Russ Larson apparently came same conclusion pur chased Ace RC After reading Safety column October 1986 issue Russ decided try out Halon extinguisher simulated model fire letter following say about test nearby street set up mock fuselage dumped eight 10 ounces glow fuel lit mess Halon way go took part t2 ounces fire out absolutely no mess set another fire gasoline extinguished short blast Halon same extinguisher certainly can see alcohol fire insidious cant see flames difficult extinguish gasolineContinued page 20 BALSA STICKS 36 48 1/16 1/409 1/16 3/810 1/16 1/214 3/32 1/410 3/32 3/612 3/32 1/216 1/8 1/806 1/8 1/41116 1/8 3/81218 1/6 1/21624 3/163/161116 3/16 3/917 3/16 1/22230 1/4 1/41824 1/4 3/81926 1/4 1/22130 1/4 3/43444 1/4 140 5/160/162128 3/8 3/92737 3/9 1/23246 3/8 3/44255 3/9 152 1/2 1/23053 1/2 3/44062 1/2 156 5/9 5/846 2/4 3/467 18 Model Aviation POSI CURE CYAN OAC RYLATE TiY to] 1 J 1 [ U 1 1 1I1 [oil SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec49 Savings 50% Off 2 oz Fast Cure 3-5 Sec895$396 56% Off 1 oz Gap-Filling 5 Sec495$249 50% Off 2 oz Gap-Filling 5 Sec895$396 56% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 2135 Old Oakland Rd Jose CA 95131 FOR ORDERS ONLY PLEASE 800 228-3237 8OO8221688w Out State INFO 408 943-0872 California $395 SHIPPING per order Hours Mon-Wed Fri & Sat 930-530 FAST SERVICE Thur 930-900 1200-500 COD ADD $190 CLEVEJAND GIANTS iW FOR GIANT SCALE BUFFS *C 87 Cert INA Jnny 537 81DH Mooqoito 81 $42 $4 Pobber 07 Fir $39r tOO OH MocqoBoeck $55 70 Boyle Ge-Bee $32 98 Steer PTt7Keydet $56Honrerd Pete Bet $32 99 NBik Widove POt $49 60 Seporerarine 066 $24 71 Deog SC3 C47 $25 09 Soperreorine S6B 53595 Doog SC-3 C47 $55 63 Ccrt Haceb 9-OE $42 86 Hook Tecaco t3 $32 94 Ccrt Hook 96E $54 64 Stect Sky-Cor $18 74 Dootittie 0-B $48 72Cer02$t/4 LAS $46 95 Monoreope Sport $36 108 Ce 0201/4 LAS 556 00 tt0il Spr Belideg 54360 Doeglo M2 Meli $24 07 Aeroeco C-3 Spt $33 68 Bride Boiidog PIr $30 42 Heererd Bate ito $45t 59 BrccnBece MeLA $54 78 Tore W-W Re $35 107 Gre Beoct P89 $54 ot Gocirk Pt iC $42 69 Lindkergc NO-St t $28 ~4 Ce CookI 91 tC $54r91 Lin4kerg NX31 1 $39 -44 OeHov Cenret Bee $2496 WrNWlNev Rot $48 2 Hoce96Meliigon $3574 C $eil4r SB2C-4 $55 94 $ec.MrMoiii$on $45rtOg FotrclPT19 Tr $592 Beajeg F26A Pt $366OWoo TopeWitg $36 4 Boeing F26A Pt $48-90 Woco Topor-Wieg $48r-69 Woco C6 Cabin $3675 Wettld Lycoedar $32 * -64Baaek C17B Stait38100 Weotidtyonder $49 9 Ct7B Stog $69r 5tPord Triret 4-AT $36 55 Lock11$ietce $30 76 Perd Triert 4-AT$48 82 Lock Ricoiro $48 114 Ford Triert 4AT $65 * 62 Stiesee T/W SR7 $18 96 Bolioece Aircrccle $40 81 Stincon T/W SR7 $26 93 Soening CSAerpk $69 122 Stincee T/W 38703858 Greet 12P Dock $29. 59 Britoi Pt F2B $20 78 Gre, 12-F Dock $56 118 Britoi Pt P2-B $45- 124 Lorb Air Roprec $487dToreor Peace 04562 irk Ai Eepoee $24 56 Cot Warkit P-40 $24 83 Lock Ar Roprece $36 60 Vo8t Coraair P40 $25 77W W, 121 BedS 54$ 80 Vogt Coroir P40 $69 63 C Seakacek P7 78 took Ligkte8 P-28 $38 94 C Seobocek F7C1 $3756 BepSee-Bee Ace $24 108 Sibe S28 Aerpir $49 74 RepSao-Bae Ace $39 60 Boeieg 100 Sport $36 70 Piper 1-3 Cob$29 90 Boeleg 100 Sport $49 106 Piper 1-2 Cek$29-72 NortHrop Goerere $48 98 Look t4edoe Brek $28 96 NortHrop Goerero $75 63 Orere P4P Hellcat $38 90 StincA torn 3/M $56 7 Boeing B17G Port $25 60S6nALoe3/M $42 103 800 B-17G Fort $55 120 Sic too 3 $83 8 WeetI Wiciriccied $22 78 CeeoT Cot PBY5A 842 68 N Aceor Nocioc $39 104 Cee Cot FBY 5A $56 68 BBonoeoo VToil $29 65 Id Cit no Cl epo 065 77 Leecocek Sadon $35 HiM Cit no Cil9po $ * 72 NA B-25 Booker $49 62 Con cc NC 4$59 65 MMorooder B-26 $49 94 Cort, NC 4 Aces SlOE teeteAtes 80*3106 Sin aiAtO RAN B Sold Titre Soolata Price eob1eot 1400 SOc Up 6-124 Pott Alooys Inc Add 10% erdore ekippln8 & es etc USA Cee & Moo EIeoitee 15% 25% 8 01 Picteriol cotalog $200 leciodee Price cc Price 11 * eao6or alone $100 ot foreige odd $100 LEVELANDMODEL&SUPPL o 103076 OET8OIT AVE CLEVELAND 0610 44182 etonneearecltnocca coeeco 515 PME ST 10 SSTl 2161 9612600 toC-Oae-eecraceta dont already have recommend go out purchase Halon-type fire extin gui$her flight box can serve double duty protecting you home should experience fire electrical chem ical origin Carbon fiber have previously cautioned users high-tech materials boron filament lesser extent carbon fiber about pain anguish getting piece materials stuck anatomy letter Bill Warner re inforces what Ive previously stated adds special twist wish maintain har monious relationship wife read following clipping attached Bills letter comes Okie Flyer Ralph Preys fine newsletter Speaking carbon fiber - wife speaking again last club meeting reported went foot surgeon have suspected wart removed bottom foot Seems no wart effort part body protect place sliver carbon fiber stuck straight foot surgeon removed sliver about -in long hurt after removed lived sore foot two weeks went back again see still hurt didnt want probe around sore foot put compress pad sent way - 35 bucks visit $80 first time After another painful week glaring stares sat building sewing room combo snide remarks about cleaning up after myself suddenly became old self smiles kisses Seems paln suddenly disappeared just like turning out light can touch area no paln shoes dont bother now So love kisses again house word advice may use carbon fiber - nice wife Vacuum floor after sanding carbon fiber thought careful damned stuff gets over Its just like dog poo OK just lying once disturb it seems get over Another $100 lesson -- - FREE guys previous safety column related account modeler inadvertently bonded wifes finger cheek sosisting him undertaking involved use CyA glue Its difficult enough get wives accept hobby causing physical anguish due pursuits wish remain active modeler also stay married urge alert hazards can cause injuy others family Propeller/engine torque According high school physics textbook Mechanical Proper ties Matter Sir Isaac Newton expressed ideas motion three laws still looked upon foundation mechanics Newtons third law states An action always opposed equal reaction mutual ac tions two bodies always equal act opposite directions Sir Isaac dwelled earth 1642 1727 50 its pretty safe say model flier laws motion came up affect models behave some 260 years after passed away evidenced letter written Bill Win ter Just Fun Henry Thomas Little Rock AR Bill forwarded letter note Continued page 127 20Model Aviation POT 0 GOLD RC SHOW Swaps HBENDUP Dealers5OUT Manufacturers SUNDAY FEB 8 87 1000-400 ADMISSION DONATION S 3 Iwblduaal 55 FamIly * Outdoor Flying Demonstrations * Swap Tables $5 * Raffle & Door Prizes advance reseivatlons encouraged * Static Aircraft Display Pilzes Awarded Popular Vote 300 * Site Concessions * FREE PARKING Letters Editor Continued page 14 dissemination information RCers year beginning threeevening symposium conjunction Tangerine will three dIferent programs held three evenings Weve assembled Whos panel speakers staff program Admission will $750 per night $1500 three nights Complete information about entire Tangerine Week Florida including symposium can obtained sending stamped pre-addressed envelope RCACF PO Box 8213 Maitland FL 32751 telephoning 305/695-2836 leaving full mailing address Dave Tyson RCACF Pres Stu Richmond RCACF Sec Maitland FL Safety Preston Continued page 20 stated Heres safety thingit could have quite bad agree could have resulted in jury loss life following account incident related Bill Henry has slighfly changed preserve anonymity involved modeler could have happened us Yesterday friends drove 200 miles attend -Scale Fly-In just great best flying Ive seen year P-47 winner similar contest last year lost during landing ran crowd scared heck out everyone flown very well landing coming little hot its pilot decided gun go around again big Sachs engine roared full throttle torque produced twisted airplane left off runway right towards microphone pilot cut throttle model continued its flight tore chairs etc about 10 feet away broke up stopped side wheelchair occu pant wasnt touched Another fellow right path fell backward get out way wasnt touched either fact nobody struck model blind luck pilot came running up ashen really shaken up gathered up debris packed things left purely pilot error majority model engines rotate counter clockwise viewed front model Because phenomenon stated Sir Isaac Newton third law pour coal engine torque produced engine attempts rotate model viewed behind left us alert effect engine/prop torque path models es pecially tail-draggers during takeoff may get effect adding power during goaround Generous corrections aileron and/or rudder may required prevent over-flying spectator area pilot responsible flight safety model Dont forget Sir Isaac third law Have safe month John Preston Model Aviation 1810 Samuel Morse Dr Reston Virginia 22090 Sparrowhawk/Lefl non Continued page 30 ensure good fit Install engine negative wiring glow plug Add Tatone manifold Use 6-in pushrod threaded both ends bent shown Notice flat filed manifold nut seat Install pressure tubing manifold tank Add upper cowl align spinner backplate add lower cowl Radius windshield block fit fuselage Wing Take two pieces h-in plywood 3 wide 20 long Align inner ends prop up outer ends 30 dihedrali 1/16 19 centerline Pin lower left right-hand skins boards Align trailing edge skins side boards Add lower center section bass spar four central short ribs Install ply webs upper bass spar A-in triangles Add central short leading edge rib Install trailing edge spar remaining ribs Wrap lower skin around ribs overhanging board hold place CyA Add aileron torque tube assembly epoxy plywood supports ribs rear spar cut Continued page 130 January1987 127 2 contactDennis Norkus Kensington P1 awaka IN 46544 255-4366 [ advance table reservations Chairman Jack Allinger 272-5073
Edition: Model Aviation - 1987/01
Page Numbers: 16, 18, 20, 127
inJohn Preston__________________ Choosing flightbox fire extin guisher Use caution hightech materials An old flyingsafety problem strikes again FOLLOW-UP explosions fire Oc tober 1986 issue column carried reports explosions fires associated glow fuel cans Several readers issue sent letters offered some explanations concerning hazards advised minimize possi bility happening First let quote letter Jim Marble modeler Aurora IN some comments fuel can fire basement modeler left flying field because impending thunderstorm dont keep back issues magazines incident involved almost empty fuel can modeler attempted unscrew cap refill basement workshop resulted ig nition fuel vapor can caused severe second-degree burns hand Jim following say Nothing will burn unless first vaporized Any organic substance will vaporize 1000 F less classified flammable Above 1000 F called combustible such wood An empty nearly-empty gas can likely explode full because larger air space allows fuel vapors accumulate carpet victim standing key culprit explosion modeler moved rubbersoled shoes carpet built up static charge body discharged himself top metal can triggering explosion thunderstorm should have prevented accident increasing humidity reducing possi bility static discharge carpet must have very dry remaining fuel can did burn because explosion removed oxy gen can order fuel vapor bum must have mixture 15% fuel vapor 85% air give take 5% Did ever see John Wayne movie Hell Fire think called Hell Fighters JDP used dynamite extinguish gas well fire example controlled explosions being used remove oxygen fight fire Jims explanation cause fuel-can ignition seems logical other com ment caution may have carpeted workshop area ever alert possibility spark due discharge static electricity build-up handling fuel cans especially metal cans Another letter subject fuel-can ex plosions came Ernie Razzano Florida modeler Ernies letter accompanied some photographs flight box arrangement designed minimize chance explosion fire caused proximity ignition source battery fuel supply Since Ernie builder Giant Scale models fuel gasoline also carries fuel models smoke systeris flight box bet ter idea separate fuel battery using two separate flight boxes box con tains 12-volt battery starter allimportant fire extinguisher phone jack plug provided connect power source two automobile diaphram-type fuel pumps installed other box along fuel cans believe Ernies two-flight-box arrange ment definite plus minimizing chance fuel can explosion fire Another solution might less expensive would attach manually-operated fuel pump fuel can always carry separately flight box would battery power glow plug engine starter etc Fire extinguishers Ernie Razzanos letter men tioned flight boxes carries allimportant fire extinguisher Another modeler Russ Larson responded column about fuel fires explosions enclosed letter copy article Aviation Safety June 1986 issue subject different types fire J U- extinguishers might carried full-scale general-aviation-type aircraft handle gas oil electrical fire article concluded Halon fire extin guisher way go Two other types fire extinguishers might encountered light aircraft cockpit dry-chemical type CO2 aircraft cockpit both types may produce fog obscures pilots vision incidents record discharge such extinguishers aircraft cockpit re sulted crash because loss vision pilot Pilots model aircraft dont have worry about vision problems fire extinguishers discharged extinguish model aircraft fire However might still want consider purchase Halon extinguisher inclusion flight box because other reasons Aviation Safety article following say about dry chemical fire extinguishers Yet another problem corrosive nature powder discharge applications notably computer rooms dry chemical extin guishers have bannednot because dont put out fire because will de stroy equipment protecting Although should never considered rea son let fire go unfought person using dry chemical extinguisher aircraft panel can practically count avionics rendered Continued page 18 THA14$15 Foi 114 EhONTPATio 16 Model Aviation Satisfaction Guaranteed Direct Only BALSA SHUTS 36 48 3O 1/18233 3/32240 1/8243 3/16249 114 256 1/32337 1/20337 1/163374931 3/323445837 l/8 3547145 3/183828255 1/4 561 5/16395 3/9 38912471 3/43165 1/164567649 3/324709456 1/849010666 3/1649312275 1/4411013494 3/84165225 1/24225261 MATCHED SHEETS 42 3/324100 1/84109 3/164120 1/44121 5A3A 3AT * WE ARE SHOOTING DOWN HIGH BALSA PRICES OM CUT CONTEST BALSA Sheets Piece ed Close Tolerances WITH SUPER QUALITYAAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa LIGHT4-6 LB BASSWOOD 48 PVHESTICKS 36 48 HARD MAPLE 18 3/163/18261/81/813 171/43/840 BALSATRIANGLES35 WOOD363/181/4301/81/41623 I3/83/849 1/41/4251/323493/163/8381/83/820 273/81/260 3/83/8301/203493/16 1/2463183/1617 243/83/456 1/21/2351/16349 3/163/4603/163823 321/23/468 3/43/4453/323561/41/4423/16 1/230 40 1156 1/83671/43/8491/41/426 APLAHKS 3/163761/43/4801/43/830 42BIRCH DO WELS36 1/43853/83/8801/4 1/234 471/809 11853/831153/91/2703/83/627 523/1611 121561/231393/83/490 13200 3/43220 1/21/2901/414 5/1625 14290133001/23/4100SPRJCESTICKS3645 3/832 11/232751/16478 1/8 1/8 15 11/243603/32491 1/8 1/4 18 24 222251/84100 233253/164117BUHDLEDEALS1/8 3/920 293PLYBIRCH 48 24435I/44139201/6336 6903/l83/1625 34 33495 3/84207201/16430 10201/4 1431 1451/6412525 1/3212425 34688 I/2428220-3/323348401/4 3/834 1/1012435 15-3/32434oss 3/845 631/912460 TAPEREDSHEETS 36151/83387153/8 1/25670 1/42 65TRAILING [DOE 36101/84361/2 1/26090 1/4385 1/4132153/163361/2 3/460 89 5fty59f 48 3/8268 5/1611/4103/16434810 3/8396 3/811/246101/4336630 12570 1/812585 1/23120 1/2270101/4436890 SPRVCETRIAHGLES 36 31612595 103/83308563/83/8451/412600 53/84346251/21/261 51/2334540343/477 LONE STAR EPOXYINSTANT CL UE51/2434855 'BALSA HOT L Ll 8851 ,Thek289103/32440845GROOVEDLGMOIJHTS 5,,59810 Thi29851/8440485121chs CaN 806743-639410, 6pntCentrolrme15,,5902 Thik55653/18448585 PLS483/83/4/1/8/40 30,,55655651/4440625 j 1/961563/83/4/5/32/40 LONE STAR MODELS1/8123001/23/4/3/16/45 123 57th St Lubbock TX 79412Handling Charge$300 pay UPS Add $200 COD $300 extra PP APO FPO accept Via Master Card personal checks COO 4-1/8% las inTea US currency Mnnun Order $1000 useless aircraft salvager refused let report ers try dry chemical extinguisher wrecked fuselage because chemical would have cor roded remains worthless junk short currently carrying dry chemical extinguisher flight box its use model may successfully put out firebut may result destruction due corrosion radio equipment So leaves choice CO2 extinguisher containing Halon Again quote Aviation Safety article Another special hazard CO2 units explosions extinguisher gets too hot sitting enclosed area such aircraft out ramp sun safety disc should rupture empty extinguisher before ex plodes according publication National Association Fire Equipment Dis tributors NAFED CO2 extinguishers may ex plode anywaysometimes because defects cylinders sometimes because double safety discs have accidentally installed NAFED cites case CO2 cylinder corroded internally exploded auto repair shop bottom extinguisher sliced completely through both sides auto chassis large upper portion skyrocketed mile away after tearing through heavy wood-truss roof C02-type fire extinguisher hardly likely reach temperature stored field box would result explosion other hand stored car parked sun just might reach temperature similar airplane cockpit similar environment So Halon might best bet comes selection extinguisher clusion flight box So what Halon extinguisher Can also explode stored hot automobile direct sunlight Again quote Aviation Safety arti cle can explode like CO2 extinguishers might according several industry people spoke Amerex manufacturer Halon extinguishers explained extinguisher con tainers tested about four times pressure experience normal circumstances reach pressure would require temperatures around 280 Fahrenheit likely encountered uses am far being considered expert comes choice fore extinguisher what read hear Halon extin guisher would definitely choice extin guish fire model airplane Russ Larson apparently came same conclusion pur chased Ace RC After reading Safety column October 1986 issue Russ decided try out Halon extinguisher simulated model fire letter following say about test nearby street set up mock fuselage dumped eight 10 ounces glow fuel lit mess Halon way go took part t2 ounces fire out absolutely no mess set another fire gasoline extinguished short blast Halon same extinguisher certainly can see alcohol fire insidious cant see flames difficult extinguish gasolineContinued page 20 BALSA STICKS 36 48 1/16 1/409 1/16 3/810 1/16 1/214 3/32 1/410 3/32 3/612 3/32 1/216 1/8 1/806 1/8 1/41116 1/8 3/81218 1/6 1/21624 3/163/161116 3/16 3/917 3/16 1/22230 1/4 1/41824 1/4 3/81926 1/4 1/22130 1/4 3/43444 1/4 140 5/160/162128 3/8 3/92737 3/9 1/23246 3/8 3/44255 3/9 152 1/2 1/23053 1/2 3/44062 1/2 156 5/9 5/846 2/4 3/467 18 Model Aviation POSI CURE CYAN OAC RYLATE TiY to] 1 J 1 [ U 1 1 1I1 [oil SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec49 Savings 50% Off 2 oz Fast Cure 3-5 Sec895$396 56% Off 1 oz Gap-Filling 5 Sec495$249 50% Off 2 oz Gap-Filling 5 Sec895$396 56% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 2135 Old Oakland Rd Jose CA 95131 FOR ORDERS ONLY PLEASE 800 228-3237 8OO8221688w Out State INFO 408 943-0872 California $395 SHIPPING per order Hours Mon-Wed Fri & Sat 930-530 FAST SERVICE Thur 930-900 1200-500 COD ADD $190 CLEVEJAND GIANTS iW FOR GIANT SCALE BUFFS *C 87 Cert INA Jnny 537 81DH Mooqoito 81 $42 $4 Pobber 07 Fir $39r tOO OH MocqoBoeck $55 70 Boyle Ge-Bee $32 98 Steer PTt7Keydet $56Honrerd Pete Bet $32 99 NBik Widove POt $49 60 Seporerarine 066 $24 71 Deog SC3 C47 $25 09 Soperreorine S6B 53595 Doog SC-3 C47 $55 63 Ccrt Haceb 9-OE $42 86 Hook Tecaco t3 $32 94 Ccrt Hook 96E $54 64 Stect Sky-Cor $18 74 Dootittie 0-B $48 72Cer02$t/4 LAS $46 95 Monoreope Sport $36 108 Ce 0201/4 LAS 556 00 tt0il Spr Belideg 54360 Doeglo M2 Meli $24 07 Aeroeco C-3 Spt $33 68 Bride Boiidog PIr $30 42 Heererd Bate ito $45t 59 BrccnBece MeLA $54 78 Tore W-W Re $35 107 Gre Beoct P89 $54 ot Gocirk Pt iC $42 69 Lindkergc NO-St t $28 ~4 Ce CookI 91 tC $54r91 Lin4kerg NX31 1 $39 -44 OeHov Cenret Bee $2496 WrNWlNev Rot $48 2 Hoce96Meliigon $3574 C $eil4r SB2C-4 $55 94 $ec.MrMoiii$on $45rtOg FotrclPT19 Tr $592 Beajeg F26A Pt $366OWoo TopeWitg $36 4 Boeing F26A Pt $48-90 Woco Topor-Wieg $48r-69 Woco C6 Cabin $3675 Wettld Lycoedar $32 * -64Baaek C17B Stait38100 Weotidtyonder $49 9 Ct7B Stog $69r 5tPord Triret 4-AT $36 55 Lock11$ietce $30 76 Perd Triert 4-AT$48 82 Lock Ricoiro $48 114 Ford Triert 4AT $65 * 62 Stiesee T/W SR7 $18 96 Bolioece Aircrccle $40 81 Stincon T/W SR7 $26 93 Soening CSAerpk $69 122 Stincee T/W 38703858 Greet 12P Dock $29. 59 Britoi Pt F2B $20 78 Gre, 12-F Dock $56 118 Britoi Pt P2-B $45- 124 Lorb Air Roprec $487dToreor Peace 04562 irk Ai Eepoee $24 56 Cot Warkit P-40 $24 83 Lock Ar Roprece $36 60 Vo8t Coraair P40 $25 77W W, 121 BedS 54$ 80 Vogt Coroir P40 $69 63 C Seakacek P7 78 took Ligkte8 P-28 $38 94 C Seobocek F7C1 $3756 BepSee-Bee Ace $24 108 Sibe S28 Aerpir $49 74 RepSao-Bae Ace $39 60 Boeieg 100 Sport $36 70 Piper 1-3 Cob$29 90 Boeleg 100 Sport $49 106 Piper 1-2 Cek$29-72 NortHrop Goerere $48 98 Look t4edoe Brek $28 96 NortHrop Goerero $75 63 Orere P4P Hellcat $38 90 StincA torn 3/M $56 7 Boeing B17G Port $25 60S6nALoe3/M $42 103 800 B-17G Fort $55 120 Sic too 3 $83 8 WeetI Wiciriccied $22 78 CeeoT Cot PBY5A 842 68 N Aceor Nocioc $39 104 Cee Cot FBY 5A $56 68 BBonoeoo VToil $29 65 Id Cit no Cl epo 065 77 Leecocek Sadon $35 HiM Cit no Cil9po $ * 72 NA B-25 Booker $49 62 Con cc NC 4$59 65 MMorooder B-26 $49 94 Cort, NC 4 Aces SlOE teeteAtes 80*3106 Sin aiAtO RAN B Sold Titre Soolata Price eob1eot 1400 SOc Up 6-124 Pott Alooys Inc Add 10% erdore ekippln8 & es etc USA Cee & Moo EIeoitee 15% 25% 8 01 Picteriol cotalog $200 leciodee Price cc Price 11 * eao6or alone $100 ot foreige odd $100 LEVELANDMODEL&SUPPL o 103076 OET8OIT AVE CLEVELAND 0610 44182 etonneearecltnocca coeeco 515 PME ST 10 SSTl 2161 9612600 toC-Oae-eecraceta dont already have recommend go out purchase Halon-type fire extin gui$her flight box can serve double duty protecting you home should experience fire electrical chem ical origin Carbon fiber have previously cautioned users high-tech materials boron filament lesser extent carbon fiber about pain anguish getting piece materials stuck anatomy letter Bill Warner re inforces what Ive previously stated adds special twist wish maintain har monious relationship wife read following clipping attached Bills letter comes Okie Flyer Ralph Preys fine newsletter Speaking carbon fiber - wife speaking again last club meeting reported went foot surgeon have suspected wart removed bottom foot Seems no wart effort part body protect place sliver carbon fiber stuck straight foot surgeon removed sliver about -in long hurt after removed lived sore foot two weeks went back again see still hurt didnt want probe around sore foot put compress pad sent way - 35 bucks visit $80 first time After another painful week glaring stares sat building sewing room combo snide remarks about cleaning up after myself suddenly became old self smiles kisses Seems paln suddenly disappeared just like turning out light can touch area no paln shoes dont bother now So love kisses again house word advice may use carbon fiber - nice wife Vacuum floor after sanding carbon fiber thought careful damned stuff gets over Its just like dog poo OK just lying once disturb it seems get over Another $100 lesson -- - FREE guys previous safety column related account modeler inadvertently bonded wifes finger cheek sosisting him undertaking involved use CyA glue Its difficult enough get wives accept hobby causing physical anguish due pursuits wish remain active modeler also stay married urge alert hazards can cause injuy others family Propeller/engine torque According high school physics textbook Mechanical Proper ties Matter Sir Isaac Newton expressed ideas motion three laws still looked upon foundation mechanics Newtons third law states An action always opposed equal reaction mutual ac tions two bodies always equal act opposite directions Sir Isaac dwelled earth 1642 1727 50 its pretty safe say model flier laws motion came up affect models behave some 260 years after passed away evidenced letter written Bill Win ter Just Fun Henry Thomas Little Rock AR Bill forwarded letter note Continued page 127 20Model Aviation POT 0 GOLD RC SHOW Swaps HBENDUP Dealers5OUT Manufacturers SUNDAY FEB 8 87 1000-400 ADMISSION DONATION S 3 Iwblduaal 55 FamIly * Outdoor Flying Demonstrations * Swap Tables $5 * Raffle & Door Prizes advance reseivatlons encouraged * Static Aircraft Display Pilzes Awarded Popular Vote 300 * Site Concessions * FREE PARKING Letters Editor Continued page 14 dissemination information RCers year beginning threeevening symposium conjunction Tangerine will three dIferent programs held three evenings Weve assembled Whos panel speakers staff program Admission will $750 per night $1500 three nights Complete information about entire Tangerine Week Florida including symposium can obtained sending stamped pre-addressed envelope RCACF PO Box 8213 Maitland FL 32751 telephoning 305/695-2836 leaving full mailing address Dave Tyson RCACF Pres Stu Richmond RCACF Sec Maitland FL Safety Preston Continued page 20 stated Heres safety thingit could have quite bad agree could have resulted in jury loss life following account incident related Bill Henry has slighfly changed preserve anonymity involved modeler could have happened us Yesterday friends drove 200 miles attend -Scale Fly-In just great best flying Ive seen year P-47 winner similar contest last year lost during landing ran crowd scared heck out everyone flown very well landing coming little hot its pilot decided gun go around again big Sachs engine roared full throttle torque produced twisted airplane left off runway right towards microphone pilot cut throttle model continued its flight tore chairs etc about 10 feet away broke up stopped side wheelchair occu pant wasnt touched Another fellow right path fell backward get out way wasnt touched either fact nobody struck model blind luck pilot came running up ashen really shaken up gathered up debris packed things left purely pilot error majority model engines rotate counter clockwise viewed front model Because phenomenon stated Sir Isaac Newton third law pour coal engine torque produced engine attempts rotate model viewed behind left us alert effect engine/prop torque path models es pecially tail-draggers during takeoff may get effect adding power during goaround Generous corrections aileron and/or rudder may required prevent over-flying spectator area pilot responsible flight safety model Dont forget Sir Isaac third law Have safe month John Preston Model Aviation 1810 Samuel Morse Dr Reston Virginia 22090 Sparrowhawk/Lefl non Continued page 30 ensure good fit Install engine negative wiring glow plug Add Tatone manifold Use 6-in pushrod threaded both ends bent shown Notice flat filed manifold nut seat Install pressure tubing manifold tank Add upper cowl align spinner backplate add lower cowl Radius windshield block fit fuselage Wing Take two pieces h-in plywood 3 wide 20 long Align inner ends prop up outer ends 30 dihedrali 1/16 19 centerline Pin lower left right-hand skins boards Align trailing edge skins side boards Add lower center section bass spar four central short ribs Install ply webs upper bass spar A-in triangles Add central short leading edge rib Install trailing edge spar remaining ribs Wrap lower skin around ribs overhanging board hold place CyA Add aileron torque tube assembly epoxy plywood supports ribs rear spar cut Continued page 130 January1987 127 2 contactDennis Norkus Kensington P1 awaka IN 46544 255-4366 [ advance table reservations Chairman Jack Allinger 272-5073
Edition: Model Aviation - 1987/01
Page Numbers: 16, 18, 20, 127
inJohn Preston__________________ Choosing flightbox fire extin guisher Use caution hightech materials An old flyingsafety problem strikes again FOLLOW-UP explosions fire Oc tober 1986 issue column carried reports explosions fires associated glow fuel cans Several readers issue sent letters offered some explanations concerning hazards advised minimize possi bility happening First let quote letter Jim Marble modeler Aurora IN some comments fuel can fire basement modeler left flying field because impending thunderstorm dont keep back issues magazines incident involved almost empty fuel can modeler attempted unscrew cap refill basement workshop resulted ig nition fuel vapor can caused severe second-degree burns hand Jim following say Nothing will burn unless first vaporized Any organic substance will vaporize 1000 F less classified flammable Above 1000 F called combustible such wood An empty nearly-empty gas can likely explode full because larger air space allows fuel vapors accumulate carpet victim standing key culprit explosion modeler moved rubbersoled shoes carpet built up static charge body discharged himself top metal can triggering explosion thunderstorm should have prevented accident increasing humidity reducing possi bility static discharge carpet must have very dry remaining fuel can did burn because explosion removed oxy gen can order fuel vapor bum must have mixture 15% fuel vapor 85% air give take 5% Did ever see John Wayne movie Hell Fire think called Hell Fighters JDP used dynamite extinguish gas well fire example controlled explosions being used remove oxygen fight fire Jims explanation cause fuel-can ignition seems logical other com ment caution may have carpeted workshop area ever alert possibility spark due discharge static electricity build-up handling fuel cans especially metal cans Another letter subject fuel-can ex plosions came Ernie Razzano Florida modeler Ernies letter accompanied some photographs flight box arrangement designed minimize chance explosion fire caused proximity ignition source battery fuel supply Since Ernie builder Giant Scale models fuel gasoline also carries fuel models smoke systeris flight box bet ter idea separate fuel battery using two separate flight boxes box con tains 12-volt battery starter allimportant fire extinguisher phone jack plug provided connect power source two automobile diaphram-type fuel pumps installed other box along fuel cans believe Ernies two-flight-box arrange ment definite plus minimizing chance fuel can explosion fire Another solution might less expensive would attach manually-operated fuel pump fuel can always carry separately flight box would battery power glow plug engine starter etc Fire extinguishers Ernie Razzanos letter men tioned flight boxes carries allimportant fire extinguisher Another modeler Russ Larson responded column about fuel fires explosions enclosed letter copy article Aviation Safety June 1986 issue subject different types fire J U- extinguishers might carried full-scale general-aviation-type aircraft handle gas oil electrical fire article concluded Halon fire extin guisher way go Two other types fire extinguishers might encountered light aircraft cockpit dry-chemical type CO2 aircraft cockpit both types may produce fog obscures pilots vision incidents record discharge such extinguishers aircraft cockpit re sulted crash because loss vision pilot Pilots model aircraft dont have worry about vision problems fire extinguishers discharged extinguish model aircraft fire However might still want consider purchase Halon extinguisher inclusion flight box because other reasons Aviation Safety article following say about dry chemical fire extinguishers Yet another problem corrosive nature powder discharge applications notably computer rooms dry chemical extin guishers have bannednot because dont put out fire because will de stroy equipment protecting Although should never considered rea son let fire go unfought person using dry chemical extinguisher aircraft panel can practically count avionics rendered Continued page 18 THA14$15 Foi 114 EhONTPATio 16 Model Aviation Satisfaction Guaranteed Direct Only BALSA SHUTS 36 48 3O 1/18233 3/32240 1/8243 3/16249 114 256 1/32337 1/20337 1/163374931 3/323445837 l/8 3547145 3/183828255 1/4 561 5/16395 3/9 38912471 3/43165 1/164567649 3/324709456 1/849010666 3/1649312275 1/4411013494 3/84165225 1/24225261 MATCHED SHEETS 42 3/324100 1/84109 3/164120 1/44121 5A3A 3AT * WE ARE SHOOTING DOWN HIGH BALSA PRICES OM CUT CONTEST BALSA Sheets Piece ed Close Tolerances WITH SUPER QUALITYAAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa LIGHT4-6 LB BASSWOOD 48 PVHESTICKS 36 48 HARD MAPLE 18 3/163/18261/81/813 171/43/840 BALSATRIANGLES35 WOOD363/181/4301/81/41623 I3/83/849 1/41/4251/323493/163/8381/83/820 273/81/260 3/83/8301/203493/16 1/2463183/1617 243/83/456 1/21/2351/16349 3/163/4603/163823 321/23/468 3/43/4453/323561/41/4423/16 1/230 40 1156 1/83671/43/8491/41/426 APLAHKS 3/163761/43/4801/43/830 42BIRCH DO WELS36 1/43853/83/8801/4 1/234 471/809 11853/831153/91/2703/83/627 523/1611 121561/231393/83/490 13200 3/43220 1/21/2901/414 5/1625 14290133001/23/4100SPRJCESTICKS3645 3/832 11/232751/16478 1/8 1/8 15 11/243603/32491 1/8 1/4 18 24 222251/84100 233253/164117BUHDLEDEALS1/8 3/920 293PLYBIRCH 48 24435I/44139201/6336 6903/l83/1625 34 33495 3/84207201/16430 10201/4 1431 1451/6412525 1/3212425 34688 I/2428220-3/323348401/4 3/834 1/1012435 15-3/32434oss 3/845 631/912460 TAPEREDSHEETS 36151/83387153/8 1/25670 1/42 65TRAILING [DOE 36101/84361/2 1/26090 1/4385 1/4132153/163361/2 3/460 89 5fty59f 48 3/8268 5/1611/4103/16434810 3/8396 3/811/246101/4336630 12570 1/812585 1/23120 1/2270101/4436890 SPRVCETRIAHGLES 36 31612595 103/83308563/83/8451/412600 53/84346251/21/261 51/2334540343/477 LONE STAR EPOXYINSTANT CL UE51/2434855 'BALSA HOT L Ll 8851 ,Thek289103/32440845GROOVEDLGMOIJHTS 5,,59810 Thi29851/8440485121chs CaN 806743-639410, 6pntCentrolrme15,,5902 Thik55653/18448585 PLS483/83/4/1/8/40 30,,55655651/4440625 j 1/961563/83/4/5/32/40 LONE STAR MODELS1/8123001/23/4/3/16/45 123 57th St Lubbock TX 79412Handling Charge$300 pay UPS Add $200 COD $300 extra PP APO FPO accept Via Master Card personal checks COO 4-1/8% las inTea US currency Mnnun Order $1000 useless aircraft salvager refused let report ers try dry chemical extinguisher wrecked fuselage because chemical would have cor roded remains worthless junk short currently carrying dry chemical extinguisher flight box its use model may successfully put out firebut may result destruction due corrosion radio equipment So leaves choice CO2 extinguisher containing Halon Again quote Aviation Safety article Another special hazard CO2 units explosions extinguisher gets too hot sitting enclosed area such aircraft out ramp sun safety disc should rupture empty extinguisher before ex plodes according publication National Association Fire Equipment Dis tributors NAFED CO2 extinguishers may ex plode anywaysometimes because defects cylinders sometimes because double safety discs have accidentally installed NAFED cites case CO2 cylinder corroded internally exploded auto repair shop bottom extinguisher sliced completely through both sides auto chassis large upper portion skyrocketed mile away after tearing through heavy wood-truss roof C02-type fire extinguisher hardly likely reach temperature stored field box would result explosion other hand stored car parked sun just might reach temperature similar airplane cockpit similar environment So Halon might best bet comes selection extinguisher clusion flight box So what Halon extinguisher Can also explode stored hot automobile direct sunlight Again quote Aviation Safety arti cle can explode like CO2 extinguishers might according several industry people spoke Amerex manufacturer Halon extinguishers explained extinguisher con tainers tested about four times pressure experience normal circumstances reach pressure would require temperatures around 280 Fahrenheit likely encountered uses am far being considered expert comes choice fore extinguisher what read hear Halon extin guisher would definitely choice extin guish fire model airplane Russ Larson apparently came same conclusion pur chased Ace RC After reading Safety column October 1986 issue Russ decided try out Halon extinguisher simulated model fire letter following say about test nearby street set up mock fuselage dumped eight 10 ounces glow fuel lit mess Halon way go took part t2 ounces fire out absolutely no mess set another fire gasoline extinguished short blast Halon same extinguisher certainly can see alcohol fire insidious cant see flames difficult extinguish gasolineContinued page 20 BALSA STICKS 36 48 1/16 1/409 1/16 3/810 1/16 1/214 3/32 1/410 3/32 3/612 3/32 1/216 1/8 1/806 1/8 1/41116 1/8 3/81218 1/6 1/21624 3/163/161116 3/16 3/917 3/16 1/22230 1/4 1/41824 1/4 3/81926 1/4 1/22130 1/4 3/43444 1/4 140 5/160/162128 3/8 3/92737 3/9 1/23246 3/8 3/44255 3/9 152 1/2 1/23053 1/2 3/44062 1/2 156 5/9 5/846 2/4 3/467 18 Model Aviation POSI CURE CYAN OAC RYLATE TiY to] 1 J 1 [ U 1 1 1I1 [oil SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec49 Savings 50% Off 2 oz Fast Cure 3-5 Sec895$396 56% Off 1 oz Gap-Filling 5 Sec495$249 50% Off 2 oz Gap-Filling 5 Sec895$396 56% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 2135 Old Oakland Rd Jose CA 95131 FOR ORDERS ONLY PLEASE 800 228-3237 8OO8221688w Out State INFO 408 943-0872 California $395 SHIPPING per order Hours Mon-Wed Fri & Sat 930-530 FAST SERVICE Thur 930-900 1200-500 COD ADD $190 CLEVEJAND GIANTS iW FOR GIANT SCALE BUFFS *C 87 Cert INA Jnny 537 81DH Mooqoito 81 $42 $4 Pobber 07 Fir $39r tOO OH MocqoBoeck $55 70 Boyle Ge-Bee $32 98 Steer PTt7Keydet $56Honrerd Pete Bet $32 99 NBik Widove POt $49 60 Seporerarine 066 $24 71 Deog SC3 C47 $25 09 Soperreorine S6B 53595 Doog SC-3 C47 $55 63 Ccrt Haceb 9-OE $42 86 Hook Tecaco t3 $32 94 Ccrt Hook 96E $54 64 Stect Sky-Cor $18 74 Dootittie 0-B $48 72Cer02$t/4 LAS $46 95 Monoreope Sport $36 108 Ce 0201/4 LAS 556 00 tt0il Spr Belideg 54360 Doeglo M2 Meli $24 07 Aeroeco C-3 Spt $33 68 Bride Boiidog PIr $30 42 Heererd Bate ito $45t 59 BrccnBece MeLA $54 78 Tore W-W Re $35 107 Gre Beoct P89 $54 ot Gocirk Pt iC $42 69 Lindkergc NO-St t $28 ~4 Ce CookI 91 tC $54r91 Lin4kerg NX31 1 $39 -44 OeHov Cenret Bee $2496 WrNWlNev Rot $48 2 Hoce96Meliigon $3574 C $eil4r SB2C-4 $55 94 $ec.MrMoiii$on $45rtOg FotrclPT19 Tr $592 Beajeg F26A Pt $366OWoo TopeWitg $36 4 Boeing F26A Pt $48-90 Woco Topor-Wieg $48r-69 Woco C6 Cabin $3675 Wettld Lycoedar $32 * -64Baaek C17B Stait38100 Weotidtyonder $49 9 Ct7B Stog $69r 5tPord Triret 4-AT $36 55 Lock11$ietce $30 76 Perd Triert 4-AT$48 82 Lock Ricoiro $48 114 Ford Triert 4AT $65 * 62 Stiesee T/W SR7 $18 96 Bolioece Aircrccle $40 81 Stincon T/W SR7 $26 93 Soening CSAerpk $69 122 Stincee T/W 38703858 Greet 12P Dock $29. 59 Britoi Pt F2B $20 78 Gre, 12-F Dock $56 118 Britoi Pt P2-B $45- 124 Lorb Air Roprec $487dToreor Peace 04562 irk Ai Eepoee $24 56 Cot Warkit P-40 $24 83 Lock Ar Roprece $36 60 Vo8t Coraair P40 $25 77W W, 121 BedS 54$ 80 Vogt Coroir P40 $69 63 C Seakacek P7 78 took Ligkte8 P-28 $38 94 C Seobocek F7C1 $3756 BepSee-Bee Ace $24 108 Sibe S28 Aerpir $49 74 RepSao-Bae Ace $39 60 Boeieg 100 Sport $36 70 Piper 1-3 Cob$29 90 Boeleg 100 Sport $49 106 Piper 1-2 Cek$29-72 NortHrop Goerere $48 98 Look t4edoe Brek $28 96 NortHrop Goerero $75 63 Orere P4P Hellcat $38 90 StincA torn 3/M $56 7 Boeing B17G Port $25 60S6nALoe3/M $42 103 800 B-17G Fort $55 120 Sic too 3 $83 8 WeetI Wiciriccied $22 78 CeeoT Cot PBY5A 842 68 N Aceor Nocioc $39 104 Cee Cot FBY 5A $56 68 BBonoeoo VToil $29 65 Id Cit no Cl epo 065 77 Leecocek Sadon $35 HiM Cit no Cil9po $ * 72 NA B-25 Booker $49 62 Con cc NC 4$59 65 MMorooder B-26 $49 94 Cort, NC 4 Aces SlOE teeteAtes 80*3106 Sin aiAtO RAN B Sold Titre Soolata Price eob1eot 1400 SOc Up 6-124 Pott Alooys Inc Add 10% erdore ekippln8 & es etc USA Cee & Moo EIeoitee 15% 25% 8 01 Picteriol cotalog $200 leciodee Price cc Price 11 * eao6or alone $100 ot foreige odd $100 LEVELANDMODEL&SUPPL o 103076 OET8OIT AVE CLEVELAND 0610 44182 etonneearecltnocca coeeco 515 PME ST 10 SSTl 2161 9612600 toC-Oae-eecraceta dont already have recommend go out purchase Halon-type fire extin gui$her flight box can serve double duty protecting you home should experience fire electrical chem ical origin Carbon fiber have previously cautioned users high-tech materials boron filament lesser extent carbon fiber about pain anguish getting piece materials stuck anatomy letter Bill Warner re inforces what Ive previously stated adds special twist wish maintain har monious relationship wife read following clipping attached Bills letter comes Okie Flyer Ralph Preys fine newsletter Speaking carbon fiber - wife speaking again last club meeting reported went foot surgeon have suspected wart removed bottom foot Seems no wart effort part body protect place sliver carbon fiber stuck straight foot surgeon removed sliver about -in long hurt after removed lived sore foot two weeks went back again see still hurt didnt want probe around sore foot put compress pad sent way - 35 bucks visit $80 first time After another painful week glaring stares sat building sewing room combo snide remarks about cleaning up after myself suddenly became old self smiles kisses Seems paln suddenly disappeared just like turning out light can touch area no paln shoes dont bother now So love kisses again house word advice may use carbon fiber - nice wife Vacuum floor after sanding carbon fiber thought careful damned stuff gets over Its just like dog poo OK just lying once disturb it seems get over Another $100 lesson -- - FREE guys previous safety column related account modeler inadvertently bonded wifes finger cheek sosisting him undertaking involved use CyA glue Its difficult enough get wives accept hobby causing physical anguish due pursuits wish remain active modeler also stay married urge alert hazards can cause injuy others family Propeller/engine torque According high school physics textbook Mechanical Proper ties Matter Sir Isaac Newton expressed ideas motion three laws still looked upon foundation mechanics Newtons third law states An action always opposed equal reaction mutual ac tions two bodies always equal act opposite directions Sir Isaac dwelled earth 1642 1727 50 its pretty safe say model flier laws motion came up affect models behave some 260 years after passed away evidenced letter written Bill Win ter Just Fun Henry Thomas Little Rock AR Bill forwarded letter note Continued page 127 20Model Aviation POT 0 GOLD RC SHOW Swaps HBENDUP Dealers5OUT Manufacturers SUNDAY FEB 8 87 1000-400 ADMISSION DONATION S 3 Iwblduaal 55 FamIly * Outdoor Flying Demonstrations * Swap Tables $5 * Raffle & Door Prizes advance reseivatlons encouraged * Static Aircraft Display Pilzes Awarded Popular Vote 300 * Site Concessions * FREE PARKING Letters Editor Continued page 14 dissemination information RCers year beginning threeevening symposium conjunction Tangerine will three dIferent programs held three evenings Weve assembled Whos panel speakers staff program Admission will $750 per night $1500 three nights Complete information about entire Tangerine Week Florida including symposium can obtained sending stamped pre-addressed envelope RCACF PO Box 8213 Maitland FL 32751 telephoning 305/695-2836 leaving full mailing address Dave Tyson RCACF Pres Stu Richmond RCACF Sec Maitland FL Safety Preston Continued page 20 stated Heres safety thingit could have quite bad agree could have resulted in jury loss life following account incident related Bill Henry has slighfly changed preserve anonymity involved modeler could have happened us Yesterday friends drove 200 miles attend -Scale Fly-In just great best flying Ive seen year P-47 winner similar contest last year lost during landing ran crowd scared heck out everyone flown very well landing coming little hot its pilot decided gun go around again big Sachs engine roared full throttle torque produced twisted airplane left off runway right towards microphone pilot cut throttle model continued its flight tore chairs etc about 10 feet away broke up stopped side wheelchair occu pant wasnt touched Another fellow right path fell backward get out way wasnt touched either fact nobody struck model blind luck pilot came running up ashen really shaken up gathered up debris packed things left purely pilot error majority model engines rotate counter clockwise viewed front model Because phenomenon stated Sir Isaac Newton third law pour coal engine torque produced engine attempts rotate model viewed behind left us alert effect engine/prop torque path models es pecially tail-draggers during takeoff may get effect adding power during goaround Generous corrections aileron and/or rudder may required prevent over-flying spectator area pilot responsible flight safety model Dont forget Sir Isaac third law Have safe month John Preston Model Aviation 1810 Samuel Morse Dr Reston Virginia 22090 Sparrowhawk/Lefl non Continued page 30 ensure good fit Install engine negative wiring glow plug Add Tatone manifold Use 6-in pushrod threaded both ends bent shown Notice flat filed manifold nut seat Install pressure tubing manifold tank Add upper cowl align spinner backplate add lower cowl Radius windshield block fit fuselage Wing Take two pieces h-in plywood 3 wide 20 long Align inner ends prop up outer ends 30 dihedrali 1/16 19 centerline Pin lower left right-hand skins boards Align trailing edge skins side boards Add lower center section bass spar four central short ribs Install ply webs upper bass spar A-in triangles Add central short leading edge rib Install trailing edge spar remaining ribs Wrap lower skin around ribs overhanging board hold place CyA Add aileron torque tube assembly epoxy plywood supports ribs rear spar cut Continued page 130 January1987 127 2 contactDennis Norkus Kensington P1 awaka IN 46544 255-4366 [ advance table reservations Chairman Jack Allinger 272-5073
Edition: Model Aviation - 1987/01
Page Numbers: 16, 18, 20, 127
inJohn Preston__________________ Choosing flightbox fire extin guisher Use caution hightech materials An old flyingsafety problem strikes again FOLLOW-UP explosions fire Oc tober 1986 issue column carried reports explosions fires associated glow fuel cans Several readers issue sent letters offered some explanations concerning hazards advised minimize possi bility happening First let quote letter Jim Marble modeler Aurora IN some comments fuel can fire basement modeler left flying field because impending thunderstorm dont keep back issues magazines incident involved almost empty fuel can modeler attempted unscrew cap refill basement workshop resulted ig nition fuel vapor can caused severe second-degree burns hand Jim following say Nothing will burn unless first vaporized Any organic substance will vaporize 1000 F less classified flammable Above 1000 F called combustible such wood An empty nearly-empty gas can likely explode full because larger air space allows fuel vapors accumulate carpet victim standing key culprit explosion modeler moved rubbersoled shoes carpet built up static charge body discharged himself top metal can triggering explosion thunderstorm should have prevented accident increasing humidity reducing possi bility static discharge carpet must have very dry remaining fuel can did burn because explosion removed oxy gen can order fuel vapor bum must have mixture 15% fuel vapor 85% air give take 5% Did ever see John Wayne movie Hell Fire think called Hell Fighters JDP used dynamite extinguish gas well fire example controlled explosions being used remove oxygen fight fire Jims explanation cause fuel-can ignition seems logical other com ment caution may have carpeted workshop area ever alert possibility spark due discharge static electricity build-up handling fuel cans especially metal cans Another letter subject fuel-can ex plosions came Ernie Razzano Florida modeler Ernies letter accompanied some photographs flight box arrangement designed minimize chance explosion fire caused proximity ignition source battery fuel supply Since Ernie builder Giant Scale models fuel gasoline also carries fuel models smoke systeris flight box bet ter idea separate fuel battery using two separate flight boxes box con tains 12-volt battery starter allimportant fire extinguisher phone jack plug provided connect power source two automobile diaphram-type fuel pumps installed other box along fuel cans believe Ernies two-flight-box arrange ment definite plus minimizing chance fuel can explosion fire Another solution might less expensive would attach manually-operated fuel pump fuel can always carry separately flight box would battery power glow plug engine starter etc Fire extinguishers Ernie Razzanos letter men tioned flight boxes carries allimportant fire extinguisher Another modeler Russ Larson responded column about fuel fires explosions enclosed letter copy article Aviation Safety June 1986 issue subject different types fire J U- extinguishers might carried full-scale general-aviation-type aircraft handle gas oil electrical fire article concluded Halon fire extin guisher way go Two other types fire extinguishers might encountered light aircraft cockpit dry-chemical type CO2 aircraft cockpit both types may produce fog obscures pilots vision incidents record discharge such extinguishers aircraft cockpit re sulted crash because loss vision pilot Pilots model aircraft dont have worry about vision problems fire extinguishers discharged extinguish model aircraft fire However might still want consider purchase Halon extinguisher inclusion flight box because other reasons Aviation Safety article following say about dry chemical fire extinguishers Yet another problem corrosive nature powder discharge applications notably computer rooms dry chemical extin guishers have bannednot because dont put out fire because will de stroy equipment protecting Although should never considered rea son let fire go unfought person using dry chemical extinguisher aircraft panel can practically count avionics rendered Continued page 18 THA14$15 Foi 114 EhONTPATio 16 Model Aviation Satisfaction Guaranteed Direct Only BALSA SHUTS 36 48 3O 1/18233 3/32240 1/8243 3/16249 114 256 1/32337 1/20337 1/163374931 3/323445837 l/8 3547145 3/183828255 1/4 561 5/16395 3/9 38912471 3/43165 1/164567649 3/324709456 1/849010666 3/1649312275 1/4411013494 3/84165225 1/24225261 MATCHED SHEETS 42 3/324100 1/84109 3/164120 1/44121 5A3A 3AT * WE ARE SHOOTING DOWN HIGH BALSA PRICES OM CUT CONTEST BALSA Sheets Piece ed Close Tolerances WITH SUPER QUALITYAAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa LIGHT4-6 LB BASSWOOD 48 PVHESTICKS 36 48 HARD MAPLE 18 3/163/18261/81/813 171/43/840 BALSATRIANGLES35 WOOD363/181/4301/81/41623 I3/83/849 1/41/4251/323493/163/8381/83/820 273/81/260 3/83/8301/203493/16 1/2463183/1617 243/83/456 1/21/2351/16349 3/163/4603/163823 321/23/468 3/43/4453/323561/41/4423/16 1/230 40 1156 1/83671/43/8491/41/426 APLAHKS 3/163761/43/4801/43/830 42BIRCH DO WELS36 1/43853/83/8801/4 1/234 471/809 11853/831153/91/2703/83/627 523/1611 121561/231393/83/490 13200 3/43220 1/21/2901/414 5/1625 14290133001/23/4100SPRJCESTICKS3645 3/832 11/232751/16478 1/8 1/8 15 11/243603/32491 1/8 1/4 18 24 222251/84100 233253/164117BUHDLEDEALS1/8 3/920 293PLYBIRCH 48 24435I/44139201/6336 6903/l83/1625 34 33495 3/84207201/16430 10201/4 1431 1451/6412525 1/3212425 34688 I/2428220-3/323348401/4 3/834 1/1012435 15-3/32434oss 3/845 631/912460 TAPEREDSHEETS 36151/83387153/8 1/25670 1/42 65TRAILING [DOE 36101/84361/2 1/26090 1/4385 1/4132153/163361/2 3/460 89 5fty59f 48 3/8268 5/1611/4103/16434810 3/8396 3/811/246101/4336630 12570 1/812585 1/23120 1/2270101/4436890 SPRVCETRIAHGLES 36 31612595 103/83308563/83/8451/412600 53/84346251/21/261 51/2334540343/477 LONE STAR EPOXYINSTANT CL UE51/2434855 'BALSA HOT L Ll 8851 ,Thek289103/32440845GROOVEDLGMOIJHTS 5,,59810 Thi29851/8440485121chs CaN 806743-639410, 6pntCentrolrme15,,5902 Thik55653/18448585 PLS483/83/4/1/8/40 30,,55655651/4440625 j 1/961563/83/4/5/32/40 LONE STAR MODELS1/8123001/23/4/3/16/45 123 57th St Lubbock TX 79412Handling Charge$300 pay UPS Add $200 COD $300 extra PP APO FPO accept Via Master Card personal checks COO 4-1/8% las inTea US currency Mnnun Order $1000 useless aircraft salvager refused let report ers try dry chemical extinguisher wrecked fuselage because chemical would have cor roded remains worthless junk short currently carrying dry chemical extinguisher flight box its use model may successfully put out firebut may result destruction due corrosion radio equipment So leaves choice CO2 extinguisher containing Halon Again quote Aviation Safety article Another special hazard CO2 units explosions extinguisher gets too hot sitting enclosed area such aircraft out ramp sun safety disc should rupture empty extinguisher before ex plodes according publication National Association Fire Equipment Dis tributors NAFED CO2 extinguishers may ex plode anywaysometimes because defects cylinders sometimes because double safety discs have accidentally installed NAFED cites case CO2 cylinder corroded internally exploded auto repair shop bottom extinguisher sliced completely through both sides auto chassis large upper portion skyrocketed mile away after tearing through heavy wood-truss roof C02-type fire extinguisher hardly likely reach temperature stored field box would result explosion other hand stored car parked sun just might reach temperature similar airplane cockpit similar environment So Halon might best bet comes selection extinguisher clusion flight box So what Halon extinguisher Can also explode stored hot automobile direct sunlight Again quote Aviation Safety arti cle can explode like CO2 extinguishers might according several industry people spoke Amerex manufacturer Halon extinguishers explained extinguisher con tainers tested about four times pressure experience normal circumstances reach pressure would require temperatures around 280 Fahrenheit likely encountered uses am far being considered expert comes choice fore extinguisher what read hear Halon extin guisher would definitely choice extin guish fire model airplane Russ Larson apparently came same conclusion pur chased Ace RC After reading Safety column October 1986 issue Russ decided try out Halon extinguisher simulated model fire letter following say about test nearby street set up mock fuselage dumped eight 10 ounces glow fuel lit mess Halon way go took part t2 ounces fire out absolutely no mess set another fire gasoline extinguished short blast Halon same extinguisher certainly can see alcohol fire insidious cant see flames difficult extinguish gasolineContinued page 20 BALSA STICKS 36 48 1/16 1/409 1/16 3/810 1/16 1/214 3/32 1/410 3/32 3/612 3/32 1/216 1/8 1/806 1/8 1/41116 1/8 3/81218 1/6 1/21624 3/163/161116 3/16 3/917 3/16 1/22230 1/4 1/41824 1/4 3/81926 1/4 1/22130 1/4 3/43444 1/4 140 5/160/162128 3/8 3/92737 3/9 1/23246 3/8 3/44255 3/9 152 1/2 1/23053 1/2 3/44062 1/2 156 5/9 5/846 2/4 3/467 18 Model Aviation POSI CURE CYAN OAC RYLATE TiY to] 1 J 1 [ U 1 1 1I1 [oil SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec49 Savings 50% Off 2 oz Fast Cure 3-5 Sec895$396 56% Off 1 oz Gap-Filling 5 Sec495$249 50% Off 2 oz Gap-Filling 5 Sec895$396 56% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 2135 Old Oakland Rd Jose CA 95131 FOR ORDERS ONLY PLEASE 800 228-3237 8OO8221688w Out State INFO 408 943-0872 California $395 SHIPPING per order Hours Mon-Wed Fri & Sat 930-530 FAST SERVICE Thur 930-900 1200-500 COD ADD $190 CLEVEJAND GIANTS iW FOR GIANT SCALE BUFFS *C 87 Cert INA Jnny 537 81DH Mooqoito 81 $42 $4 Pobber 07 Fir $39r tOO OH MocqoBoeck $55 70 Boyle Ge-Bee $32 98 Steer PTt7Keydet $56Honrerd Pete Bet $32 99 NBik Widove POt $49 60 Seporerarine 066 $24 71 Deog SC3 C47 $25 09 Soperreorine S6B 53595 Doog SC-3 C47 $55 63 Ccrt Haceb 9-OE $42 86 Hook Tecaco t3 $32 94 Ccrt Hook 96E $54 64 Stect Sky-Cor $18 74 Dootittie 0-B $48 72Cer02$t/4 LAS $46 95 Monoreope Sport $36 108 Ce 0201/4 LAS 556 00 tt0il Spr Belideg 54360 Doeglo M2 Meli $24 07 Aeroeco C-3 Spt $33 68 Bride Boiidog PIr $30 42 Heererd Bate ito $45t 59 BrccnBece MeLA $54 78 Tore W-W Re $35 107 Gre Beoct P89 $54 ot Gocirk Pt iC $42 69 Lindkergc NO-St t $28 ~4 Ce CookI 91 tC $54r91 Lin4kerg NX31 1 $39 -44 OeHov Cenret Bee $2496 WrNWlNev Rot $48 2 Hoce96Meliigon $3574 C $eil4r SB2C-4 $55 94 $ec.MrMoiii$on $45rtOg FotrclPT19 Tr $592 Beajeg F26A Pt $366OWoo TopeWitg $36 4 Boeing F26A Pt $48-90 Woco Topor-Wieg $48r-69 Woco C6 Cabin $3675 Wettld Lycoedar $32 * -64Baaek C17B Stait38100 Weotidtyonder $49 9 Ct7B Stog $69r 5tPord Triret 4-AT $36 55 Lock11$ietce $30 76 Perd Triert 4-AT$48 82 Lock Ricoiro $48 114 Ford Triert 4AT $65 * 62 Stiesee T/W SR7 $18 96 Bolioece Aircrccle $40 81 Stincon T/W SR7 $26 93 Soening CSAerpk $69 122 Stincee T/W 38703858 Greet 12P Dock $29. 59 Britoi Pt F2B $20 78 Gre, 12-F Dock $56 118 Britoi Pt P2-B $45- 124 Lorb Air Roprec $487dToreor Peace 04562 irk Ai Eepoee $24 56 Cot Warkit P-40 $24 83 Lock Ar Roprece $36 60 Vo8t Coraair P40 $25 77W W, 121 BedS 54$ 80 Vogt Coroir P40 $69 63 C Seakacek P7 78 took Ligkte8 P-28 $38 94 C Seobocek F7C1 $3756 BepSee-Bee Ace $24 108 Sibe S28 Aerpir $49 74 RepSao-Bae Ace $39 60 Boeieg 100 Sport $36 70 Piper 1-3 Cob$29 90 Boeleg 100 Sport $49 106 Piper 1-2 Cek$29-72 NortHrop Goerere $48 98 Look t4edoe Brek $28 96 NortHrop Goerero $75 63 Orere P4P Hellcat $38 90 StincA torn 3/M $56 7 Boeing B17G Port $25 60S6nALoe3/M $42 103 800 B-17G Fort $55 120 Sic too 3 $83 8 WeetI Wiciriccied $22 78 CeeoT Cot PBY5A 842 68 N Aceor Nocioc $39 104 Cee Cot FBY 5A $56 68 BBonoeoo VToil $29 65 Id Cit no Cl epo 065 77 Leecocek Sadon $35 HiM Cit no Cil9po $ * 72 NA B-25 Booker $49 62 Con cc NC 4$59 65 MMorooder B-26 $49 94 Cort, NC 4 Aces SlOE teeteAtes 80*3106 Sin aiAtO RAN B Sold Titre Soolata Price eob1eot 1400 SOc Up 6-124 Pott Alooys Inc Add 10% erdore ekippln8 & es etc USA Cee & Moo EIeoitee 15% 25% 8 01 Picteriol cotalog $200 leciodee Price cc Price 11 * eao6or alone $100 ot foreige odd $100 LEVELANDMODEL&SUPPL o 103076 OET8OIT AVE CLEVELAND 0610 44182 etonneearecltnocca coeeco 515 PME ST 10 SSTl 2161 9612600 toC-Oae-eecraceta dont already have recommend go out purchase Halon-type fire extin gui$her flight box can serve double duty protecting you home should experience fire electrical chem ical origin Carbon fiber have previously cautioned users high-tech materials boron filament lesser extent carbon fiber about pain anguish getting piece materials stuck anatomy letter Bill Warner re inforces what Ive previously stated adds special twist wish maintain har monious relationship wife read following clipping attached Bills letter comes Okie Flyer Ralph Preys fine newsletter Speaking carbon fiber - wife speaking again last club meeting reported went foot surgeon have suspected wart removed bottom foot Seems no wart effort part body protect place sliver carbon fiber stuck straight foot surgeon removed sliver about -in long hurt after removed lived sore foot two weeks went back again see still hurt didnt want probe around sore foot put compress pad sent way - 35 bucks visit $80 first time After another painful week glaring stares sat building sewing room combo snide remarks about cleaning up after myself suddenly became old self smiles kisses Seems paln suddenly disappeared just like turning out light can touch area no paln shoes dont bother now So love kisses again house word advice may use carbon fiber - nice wife Vacuum floor after sanding carbon fiber thought careful damned stuff gets over Its just like dog poo OK just lying once disturb it seems get over Another $100 lesson -- - FREE guys previous safety column related account modeler inadvertently bonded wifes finger cheek sosisting him undertaking involved use CyA glue Its difficult enough get wives accept hobby causing physical anguish due pursuits wish remain active modeler also stay married urge alert hazards can cause injuy others family Propeller/engine torque According high school physics textbook Mechanical Proper ties Matter Sir Isaac Newton expressed ideas motion three laws still looked upon foundation mechanics Newtons third law states An action always opposed equal reaction mutual ac tions two bodies always equal act opposite directions Sir Isaac dwelled earth 1642 1727 50 its pretty safe say model flier laws motion came up affect models behave some 260 years after passed away evidenced letter written Bill Win ter Just Fun Henry Thomas Little Rock AR Bill forwarded letter note Continued page 127 20Model Aviation POT 0 GOLD RC SHOW Swaps HBENDUP Dealers5OUT Manufacturers SUNDAY FEB 8 87 1000-400 ADMISSION DONATION S 3 Iwblduaal 55 FamIly * Outdoor Flying Demonstrations * Swap Tables $5 * Raffle & Door Prizes advance reseivatlons encouraged * Static Aircraft Display Pilzes Awarded Popular Vote 300 * Site Concessions * FREE PARKING Letters Editor Continued page 14 dissemination information RCers year beginning threeevening symposium conjunction Tangerine will three dIferent programs held three evenings Weve assembled Whos panel speakers staff program Admission will $750 per night $1500 three nights Complete information about entire Tangerine Week Florida including symposium can obtained sending stamped pre-addressed envelope RCACF PO Box 8213 Maitland FL 32751 telephoning 305/695-2836 leaving full mailing address Dave Tyson RCACF Pres Stu Richmond RCACF Sec Maitland FL Safety Preston Continued page 20 stated Heres safety thingit could have quite bad agree could have resulted in jury loss life following account incident related Bill Henry has slighfly changed preserve anonymity involved modeler could have happened us Yesterday friends drove 200 miles attend -Scale Fly-In just great best flying Ive seen year P-47 winner similar contest last year lost during landing ran crowd scared heck out everyone flown very well landing coming little hot its pilot decided gun go around again big Sachs engine roared full throttle torque produced twisted airplane left off runway right towards microphone pilot cut throttle model continued its flight tore chairs etc about 10 feet away broke up stopped side wheelchair occu pant wasnt touched Another fellow right path fell backward get out way wasnt touched either fact nobody struck model blind luck pilot came running up ashen really shaken up gathered up debris packed things left purely pilot error majority model engines rotate counter clockwise viewed front model Because phenomenon stated Sir Isaac Newton third law pour coal engine torque produced engine attempts rotate model viewed behind left us alert effect engine/prop torque path models es pecially tail-draggers during takeoff may get effect adding power during goaround Generous corrections aileron and/or rudder may required prevent over-flying spectator area pilot responsible flight safety model Dont forget Sir Isaac third law Have safe month John Preston Model Aviation 1810 Samuel Morse Dr Reston Virginia 22090 Sparrowhawk/Lefl non Continued page 30 ensure good fit Install engine negative wiring glow plug Add Tatone manifold Use 6-in pushrod threaded both ends bent shown Notice flat filed manifold nut seat Install pressure tubing manifold tank Add upper cowl align spinner backplate add lower cowl Radius windshield block fit fuselage Wing Take two pieces h-in plywood 3 wide 20 long Align inner ends prop up outer ends 30 dihedrali 1/16 19 centerline Pin lower left right-hand skins boards Align trailing edge skins side boards Add lower center section bass spar four central short ribs Install ply webs upper bass spar A-in triangles Add central short leading edge rib Install trailing edge spar remaining ribs Wrap lower skin around ribs overhanging board hold place CyA Add aileron torque tube assembly epoxy plywood supports ribs rear spar cut Continued page 130 January1987 127 2 contactDennis Norkus Kensington P1 awaka IN 46544 255-4366 [ advance table reservations Chairman Jack Allinger 272-5073