Safety Comes First

___John Preston___________________________ Safety Comes First allergic re actions epoxy CyA glues Another prop safety item RC fail-safe devices work like want MOST will reading column dunng first weeks April However write January 31 backyard still has two feet snow dumped Washington DC area just week ago have ski-equipped model trip flying field would probably require use four-wheeldrive vehicle Lets just say its good building weather have filing cabinet office contains letters readers column other material Ive accumulated since first started writing MA back January 1980 part files arranged subject fattest bunch far titled Chemical Hazards Under category goes material conceming effect health may occur use glues paints etc number letters have mentioned trips doctor because respiratory skin ailments ultimtely diagnosed being result exposure various modeling chemicals Sur prisingly number cases doctor did connect use modeling materials symptoms being experienced patient Such appeared case Bill Fike dermatographism may have result use cyanoacrylate glue Portions Bills letter published Safety column appeared February 1987 issue MA appeared print resulted nu merous letters readers believe use cyanoacrylate glue may also responsible skin respiratory ailments Typical among letter Dick Yelm Lombard IL age 69 has hobby longer us Dick has experienced allergic reactions use both epoxy cyanoacrylate glue described following account taken letter 1972 used particular brand liquid epoxy glue Parts B considerable amount time required reinforce fuel-tank compartment early summer following week after flying hot sun experienced severe itching scaling around both eyes eyelids nose mouth chin well some around both ears thought case severe sunburn did eye doctor took about three four weeks alleviate did relate problem use epoxy glue fall use epoxy glue again small quantity immediately broke out rash same areas before hope might particular brand causing problems tried sev eral other brands including water-soluble epoxy glues results always same severe rash scaling purchased used recom mended mask containing charcoal filters result again same telephoned manufacturers epoxy glue told amine molecule culprit released during curing process after Parts B mixed company spokesman stated some individuals may able take bath epoxy glue affected others cannot enter fac tory door having skin problems Further effects exposure amine mole cule cumulative can never purged system Therefore suggested refrain ever using epoxy again since mere presence same room could result break ing out rash Although has now excess 10 years still cannot near epoxy glues few years ago first became avail able started using cyanoacrylate CyA glues experienced no problems whatsoever although some modelers complaining However again after flying very sunny day experi enced severe itching around lower front neck looked like sunburn did break out small bumps welts some would burst open Furthermore stayed throughout entire summer 1986 although would periodically come go few months ago upper part left ann broke out several small welts like hives doctor expressed opinion might form psoriasis doctor once told could over 10000 forms skin diseases yet identified So doubt call pso riasis prescribed salve although welts dried up scars still continued use CyA sparingly few weeks ago left forearm broke out three rows about 21 bumps welts itch may break open have yet disappear Now right forearm has welts few back two thighs legs Continued page 16 14 Model Aviation $tK C, YA INOWGW$., IM 5EININ& 1DTI4IN1TI4S &LIAE DOES WIEPTNII4S 10 tAE column ii provided address llamas concern regarding safety aspects model aviation activities Content column however opinion author does met necessarily represent official positiom Acadmy Model Aerouauties Satisfaction Guaranteed Direct Only BALSA SHUTS 36 48 30I 11162331/16 1/4 3/322401/16 3/8 1/8 2431/16 1/2 3/162493/32 1/4 1/4 2563/32 3/8 1/323373/32 1/2 1/263371/6 1/6 1/1633749311/8 1/4 3/3234458371/8 3/8 1/8 35471451/8 1/2 3/1636282553/163/16 1/4 37395613/16 3/8 5/163853/16 1/2 3/8 388124711/4 1/4 1/2 31101561/4 3/8 3/4 31651/4 1/2 1/1645676481/4 3/4 3/3247094561/4 1 1/8 485106665/165/16 3/16493122753/8 3/6 1/4 4110134843/8 1/2 3/6 41652253/8 3/4 1/2 42252613/8 1 MATCHED SHUTS 421/2 1/2 1/2 34 3/3241801/2 1 1/841065/8 5/8 1/441 31 BALSA SliCKS 3648 09 10 14 10 12 16 06 11 12 18 11 17 22 16 19 21 34 40 21 27 32 42 52 36 46 56 48 67 BALSA HOT LINE Cmli 806 745-6394 10 am 6 pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 VAI V_ BALSA TRIANGLES 36WOOD 1/41/425 1/323 3/83/6301/203 1/21/2351/163 3/43/445 3/323 1 155 1/63 3/163 BALSA PLANKS36 1/43 11853/83 121501/23 132003/43 1428013 11/232751/164 11/243603/324 222251/64 233253/164 244351/44 334853/84 346891/24 TAPERED SHEETS36 1/4265TRAJLIHG EDGE36 1/43851/4132 3/82485/1611/438 3/83883/611/246 1/231201/2270 16 18 24 16 30 24 26 30 44 28 37 48 55 53 62 LONE STAR EPOXY 9,Lsl-895 0 win 598 15, 506 30 sin 580 INSTANTGLUE 1 T5ck 280 1 , TSn 298 2, Thck 550 2 , Th, 550 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 4-6 LB 38 49 49 49 56 67 76 85 115 138 220 380 78 91 106 117 138 207 282 must try 4-6 lb balsa BASSWOOD 3/16 3/16 3/161/4 3/163/6 3/161/2 3/16 3/4 1/4 1/4 1/4 3/8 1/4 3/4 3/8 3/9 3/812 3/8 3/4 1/21/2 1/2 3/4 48 26 30 38 46 80 42 49 80 60 70 80 80 100 BUNDLE DEALS 20-1/6338 685 20-1/16434 1020 20-3/32 336 04E 15-3/32434 955 15-1/83534 715 10-1/6438 675 15-3/16336 900 10-3/16436 810 101/4336 630 18-1/4436 890 183/8336 850 5-3/8436 625 5-1/2334 540 5-1/2434 855 10-3/32448 840 5-1/8448 485 53/16448 585 5-1/4448 625 PINE STICKS 36 48 1/8 1/6 1/814 1/83/8 376316 316 3/8 3/161/2 11414 1/43/5 1412 383/8 1317 1623 2027 1724 2332 3840 2637 3842 3447 3752 SPRUCE STICKS 36 48 1/8 1/815 1/8 1/41824 1/8 3/83838 3/163/162534 14 1/43145 14 3/83450 3/8 3/64563 3/8 125570 1/2 1/25088 1i2 3/45688 SPRUCE TRIANGLES 3/63/8 1/21/2 34 3/4 61 77 HARD MAPLE 1/43/6 3/63/8 3/8 1/2 3/63/4 1/2 3/4 BIRCH 00 WELS 16 316 14 516 38 18 45 46 50 56 68 36 09 11 14 25 32 3PLYBIRCH48 16412525 1/3212425 1/1612435 1/812450 SPLVBIRCH48 332 0 1812585 3/1612585 1/412680 GROOVED LG MOUNTS l2eh88 3/634/19/40 3/834/5/32/45 1/23/413/16/45 LITEPLY 48 1/86150 1/812350 Handling ChargeS300 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Masle Caid peisona/ checks oi COD 4-1/8% Ia Teos US crrency MnnunOrde 51000 ______________I 6] 314 TRIM KNIFE Trim Knfe /5 designed precisely edge trim excess cover /flQ materal ur model Can used outside edges straight curved Blade can set 1/18 101/4 simple adjustment screw Trm Knife wIl make perfect overlap bus seams Works cover, g materials 6 blades Trim Knife Set includes 6 blades$9 00 Trim Knife Blades 5$3 00 rck No Notches Straight Cuts Heavy duty entra sharp no notch olade Same sze regular blades tip does ties cuBing strip ping thicker materials Great big birds Big Bird Blades box 100 blades$950 Trial sze oaciaoe 120 bladeol$250 addition left foot sometimes itches like crazy very small area far has no evidence welts believe am now allergic cyanoacrylate glue recent articles have read may dermatographism believe majority modelers use above glues will sooner later experience some degree allergic reaction Its just some individuals resistant others recently talked two people 14 years ago did believe warning concerning epoxy glue Recently both broke out severe rashes like cannot exposed anymore epoxy glue Also February 1987 Safety column cluded warning Graham Hicks about plac ing epoxy microwave oven order heat make easier spread response Gra hams warning received letter Maxwell Todd Columbus GA also bad experi ence heating cured epoxy Maxwell following say winter 1982 shortly after building first RC model airplane decided loosen up some cured epoxy heating propane torch epoxy question some used secure metal clevis onto throttle cable stead soldering it cured least two three months time inci dent Anyway heated wire clevis epoxy torch soften As pulling clevis off wire still heating torch epoxy caught fire flame lasted few seconds before extinguished smell horrible air filled small floating pieces black carbon-like matter opened window Continued page 18 Hoi3y Horn Old Timer IJLIa born JJq4i 1/id ~wi~LalZo8 Gas Moan 1951 BROOKLYN DODGER 55 Cabin 5"NEWEST5 Retail $529555INTROOUCTORY PRICE $3969 1930 Record Breaker 96 $6956 1939 Zipper 5855356 1930 Kloud King 63 $8236 18141 Brigidier 56 SSO76 1981 Super Quaker 70 $7276 1950 So Long 50$3936 1936 Buccaneer 85 $0996 1930 Clipper MKI 72$5t06 1937 Dallaire 108 $75 16 1938 Miss America 84 $7196 1851 Ptayby Sr 00 $5116 1981 Playboy Jr 55 $3116 1530 Powerhouse 85 $5306 1950 Sailplane 78 $8476 1938 Trenton Terror 72 $5076 1940 Ranger 56$3196 1939 Korda Wake 55 $1916 1939 Mercury 72 6 Thee kit qualify far SAM events 1FF 5 RIG feature highest quaScy machine cut S anded part 5uperior t 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B blade gives t acceso Cuts weed plastIc melal HARDENED MUSIC WIRE extra htades-3/S199 room left area air out went living room feeling quite nauseated fumes burned epoxy thought just sickening smell sat down watch TV Within two minutes dizzy feeling like going faint Within five minutes dizziness gone hor rible headache felt someone driving 16-penny nail cranium headache lasted several hours before going away have never allergic glues type epoxy causes no problems whatsoever get onto hands working knew im mediately after headache appeared burning epoxy poisoned through con taminated air room no other aftereffects have other problems since incident guarantee will never heat epoxy again Before leaving subject chemical hazards Id like ask reader has answer question contained letter received Den nis Weatherly modeler Auburn WA Dennis following say have using CyA glues several years have problem accelerators came out decided give try seined time used accelerator after about 15 minutes would get sharp pain chest shortness breath splitting headache symptoms would pass after about half hour occurred after used accel erator wasnt sure what happening quit using About month later cleaning tape drive computer work using Freon TF spray can 15 minutes experienced same Continued page 20 18Model Aviation Carry Largest Only Stock Kralt Parts World rstt alive working KRAFT MIDWEST ILL FLAT Authorized Warranty Service FREOIJENCY CONVERSION alone 5255with repair 5105 DIeco.nt Dunt oOtwnreIon end 1 extr8 Alt tuning done epectrum unetyxer. 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DETROIT AVENUE CLEVELAND OHIO 44102 1ORE POWERTh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESEUZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm and 930 pm EST DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion4 hnology since 1976 previous Safety columns Ive mentioned potential hazard getting jacket drawstrings transmitter neck-straps caught rotating props Dennis account zipper incident Ive heard before aware loose clothing may get sucked prop arc thereby result eye face injuty close Fail-safe devicespro con Several times previous Safety columns Ive discussed fail-safe devices intended minimize eliminate loss control RC model event radio interference equipment failure de vices come forms add-on ac cessories some built radio itself Such fail-safe device subject recent letter Athens Greece sent An tonis Papadopoulos will see fol lowing account Antonis questions merits such devices would like describe what happened clubs field week ago Helicopter flier using top-line radio system built-in fail safe features tryingto adjust engine new Hirobo Shuttle model sitting Continued page 146 Extra 230 Two Popular Sizes 1/3 1/4 Standoff Scale 1/3 Scale Wing Span nches Wing Area 1300 sq/in Power20 cu no hardware $19995 ship Partial Kit$11995 $8 ship Plans$2000 $3 ship Cowl$2995 $3 ship Canopy$2000 $3 ship Landing Gear$1995 $3 ship Foam Parts wing & decks$45 00 hip Decals pac$500 hip 1/4 Scale Wing Span72/2 inches Wing Area855 sqIin Power61 2-C 120 4-C Kit wheel pants & decals md $16995 hip Plans $2500 Cowl $2495 Wheel Pants $1500 Landing Gear $1250 Foam Parts wng & decks $4000 Canopy$1000 Decals pac $5 00 $3 ship $3 ship $3 ship $3 ship $8 ship $3 ship $1 ship CASH Y ORDER CERTIFIED CHECK 3 weeks personal checks VISA ERCARD ACCEPTED SEND SASE FOR MORE INFORMATION 712-943-4102 R/C EXTRAS RR #1 Box 288 Sergeant Bluff IA 51054 22 Model Aviation coat unzipped bottom edge coat getting pulled toward prop came around wing tip warn just leaned forward tweak needle felt tug friend fell ground zipper jacket pulled prop ripped zipper slide off threw friends face hitting him corner eye wife club members nurse bandaged up eye before rushed hospital accident cost buddy sight eye SPECILISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 05 IS & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD COX ENGINES IF ITS COX ENGINE CALL US! 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WE ALSO STOCK KLOTZ OIL BROAD RANGE OF GLOW PLUGS SPECIAL FUEL TUBING & HARD-TO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES CARBON FIBER COILS PLUGS CONDENSERS SILK TIMERS TRANSISTOR IGNITION SYSTEMS l/2A TEXACO ENGINES EVERYTHING YOU NEED FOR OLD TIMER INCLUDING REPLICA OR WiCK ENGINES NE WI! 1/2A PLAYBOY SR FOR l/2A TEXACO R/C FF ELECTRIC OR SPORT KIT $2995 Safety/Preston Continued page 22 ground After couple minutes engine nmning perfectly throttled back ofasuddenthe Heicopterenginestartedtorev up seconds hovering nicely boom deviation Moments later started climbing What first flight No need trim no need touch control sticks no need transmitter eithet What happened turned out battery voltage dropped below safe level fail-safe devices took control As result Helicopter became just point sky After engine stopped started coming down Hi roho must very proud because after autorotation Helicopter landed minor damage question after What reason fail-safe switches devices since dont know time attitude model really going use would like know readers have reported anything favor device really want opinion switch secondary frequency during emer gency because purpose lose control rather have control surfaces model move preset positions am familiar radio system involved seems fail-safe device throttle reversed drop battery voltage level unsafe should have closed throttle rather opened However issue question Antonis has asked readers What wants know advantage having con trol surfaces go preset position neutral case flying controls event trans mitter signal lost whatever reason Cer tainly isnt going help Aerobatic flier save model control surfaces suddenly go neutral middle complex maneuver other hand Im favor having engine go low throttle upon loss transmitter signal receiver battery voltage drops below safe level readers wish express opinions Id welcome letters Have safe month John Preston 2812 Northampton Sr N W Washington DC 20015 responding advertisers mention thatyou read aboutthem ModelAviation Doubler/Shepherd Continued page 36 be mowed grass little too tall lettering model done dry transfers art supply store coat clear Sig Skybrite applied over protection sponsor decals canopy model auto decal sheets pilot head started out Williams Bros figure back side goggles painted black enamel give appearance sunglasses am pleased way project has turned out easy build flies very nicely will either clip current wing build another reduced span will also trying other engines model ing event becoming quite popular local clubs 500 sport racer stock Royal 25s HR 25s clippedwing version should fit right expanding Pylon Racing event model qsite change pace decide build hope will have fun enjoy Remember fourcycles dont scream just putt-putt Radio Technique/Myers Continued page 39 FCC time will able tell whether system contemplating has certificated according AMA Guidelines Right now have nothing Resource managemenl Noninterfrring RC channel arrangements think Dennis Tier ney has best solution See Whistle Blows Dont Fly page 93 et seq Model Aviation March 1987 urge Dennis con tinue working design until includes 80 RC channels scheduled 1991 well seven old channels 27 MHz 50 MHz 53 MHz channels Besides should reduce wiring double-sided PC board will put him position sell useful gimmick RC airplane boat car clubs over United States Canada have feeling once people see easily Dennis gadget works organization will want Its sort self-policing transmitter impound manager Go Dennis 146 Model Aviation OUR REV-UP INVENTORY AVERAGES 12000 PROPSIII SEE OUR AD LAST MONTH FOR LIST OF PROPS AND PRICES ding iiThg ring. 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___John Preston___________________________ Safety Comes First allergic re actions epoxy CyA glues Another prop safety item RC fail-safe devices work like want MOST will reading column dunng first weeks April However write January 31 backyard still has two feet snow dumped Washington DC area just week ago have ski-equipped model trip flying field would probably require use four-wheeldrive vehicle Lets just say its good building weather have filing cabinet office contains letters readers column other material Ive accumulated since first started writing MA back January 1980 part files arranged subject fattest bunch far titled Chemical Hazards Under category goes material conceming effect health may occur use glues paints etc number letters have mentioned trips doctor because respiratory skin ailments ultimtely diagnosed being result exposure various modeling chemicals Sur prisingly number cases doctor did connect use modeling materials symptoms being experienced patient Such appeared case Bill Fike dermatographism may have result use cyanoacrylate glue Portions Bills letter published Safety column appeared February 1987 issue MA appeared print resulted nu merous letters readers believe use cyanoacrylate glue may also responsible skin respiratory ailments Typical among letter Dick Yelm Lombard IL age 69 has hobby longer us Dick has experienced allergic reactions use both epoxy cyanoacrylate glue described following account taken letter 1972 used particular brand liquid epoxy glue Parts B considerable amount time required reinforce fuel-tank compartment early summer following week after flying hot sun experienced severe itching scaling around both eyes eyelids nose mouth chin well some around both ears thought case severe sunburn did eye doctor took about three four weeks alleviate did relate problem use epoxy glue fall use epoxy glue again small quantity immediately broke out rash same areas before hope might particular brand causing problems tried sev eral other brands including water-soluble epoxy glues results always same severe rash scaling purchased used recom mended mask containing charcoal filters result again same telephoned manufacturers epoxy glue told amine molecule culprit released during curing process after Parts B mixed company spokesman stated some individuals may able take bath epoxy glue affected others cannot enter fac tory door having skin problems Further effects exposure amine mole cule cumulative can never purged system Therefore suggested refrain ever using epoxy again since mere presence same room could result break ing out rash Although has now excess 10 years still cannot near epoxy glues few years ago first became avail able started using cyanoacrylate CyA glues experienced no problems whatsoever although some modelers complaining However again after flying very sunny day experi enced severe itching around lower front neck looked like sunburn did break out small bumps welts some would burst open Furthermore stayed throughout entire summer 1986 although would periodically come go few months ago upper part left ann broke out several small welts like hives doctor expressed opinion might form psoriasis doctor once told could over 10000 forms skin diseases yet identified So doubt call pso riasis prescribed salve although welts dried up scars still continued use CyA sparingly few weeks ago left forearm broke out three rows about 21 bumps welts itch may break open have yet disappear Now right forearm has welts few back two thighs legs Continued page 16 14 Model Aviation $tK C, YA INOWGW$., IM 5EININ& 1DTI4IN1TI4S &LIAE DOES WIEPTNII4S 10 tAE column ii provided address llamas concern regarding safety aspects model aviation activities Content column however opinion author does met necessarily represent official positiom Acadmy Model Aerouauties Satisfaction Guaranteed Direct Only BALSA SHUTS 36 48 30I 11162331/16 1/4 3/322401/16 3/8 1/8 2431/16 1/2 3/162493/32 1/4 1/4 2563/32 3/8 1/323373/32 1/2 1/263371/6 1/6 1/1633749311/8 1/4 3/3234458371/8 3/8 1/8 35471451/8 1/2 3/1636282553/163/16 1/4 37395613/16 3/8 5/163853/16 1/2 3/8 388124711/4 1/4 1/2 31101561/4 3/8 3/4 31651/4 1/2 1/1645676481/4 3/4 3/3247094561/4 1 1/8 485106665/165/16 3/16493122753/8 3/6 1/4 4110134843/8 1/2 3/6 41652253/8 3/4 1/2 42252613/8 1 MATCHED SHUTS 421/2 1/2 1/2 34 3/3241801/2 1 1/841065/8 5/8 1/441 31 BALSA SliCKS 3648 09 10 14 10 12 16 06 11 12 18 11 17 22 16 19 21 34 40 21 27 32 42 52 36 46 56 48 67 BALSA HOT LINE Cmli 806 745-6394 10 am 6 pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 VAI V_ BALSA TRIANGLES 36WOOD 1/41/425 1/323 3/83/6301/203 1/21/2351/163 3/43/445 3/323 1 155 1/63 3/163 BALSA PLANKS36 1/43 11853/83 121501/23 132003/43 1428013 11/232751/164 11/243603/324 222251/64 233253/164 244351/44 334853/84 346891/24 TAPERED SHEETS36 1/4265TRAJLIHG EDGE36 1/43851/4132 3/82485/1611/438 3/83883/611/246 1/231201/2270 16 18 24 16 30 24 26 30 44 28 37 48 55 53 62 LONE STAR EPOXY 9,Lsl-895 0 win 598 15, 506 30 sin 580 INSTANTGLUE 1 T5ck 280 1 , TSn 298 2, Thck 550 2 , Th, 550 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 4-6 LB 38 49 49 49 56 67 76 85 115 138 220 380 78 91 106 117 138 207 282 must try 4-6 lb balsa BASSWOOD 3/16 3/16 3/161/4 3/163/6 3/161/2 3/16 3/4 1/4 1/4 1/4 3/8 1/4 3/4 3/8 3/9 3/812 3/8 3/4 1/21/2 1/2 3/4 48 26 30 38 46 80 42 49 80 60 70 80 80 100 BUNDLE DEALS 20-1/6338 685 20-1/16434 1020 20-3/32 336 04E 15-3/32434 955 15-1/83534 715 10-1/6438 675 15-3/16336 900 10-3/16436 810 101/4336 630 18-1/4436 890 183/8336 850 5-3/8436 625 5-1/2334 540 5-1/2434 855 10-3/32448 840 5-1/8448 485 53/16448 585 5-1/4448 625 PINE STICKS 36 48 1/8 1/6 1/814 1/83/8 376316 316 3/8 3/161/2 11414 1/43/5 1412 383/8 1317 1623 2027 1724 2332 3840 2637 3842 3447 3752 SPRUCE STICKS 36 48 1/8 1/815 1/8 1/41824 1/8 3/83838 3/163/162534 14 1/43145 14 3/83450 3/8 3/64563 3/8 125570 1/2 1/25088 1i2 3/45688 SPRUCE TRIANGLES 3/63/8 1/21/2 34 3/4 61 77 HARD MAPLE 1/43/6 3/63/8 3/8 1/2 3/63/4 1/2 3/4 BIRCH 00 WELS 16 316 14 516 38 18 45 46 50 56 68 36 09 11 14 25 32 3PLYBIRCH48 16412525 1/3212425 1/1612435 1/812450 SPLVBIRCH48 332 0 1812585 3/1612585 1/412680 GROOVED LG MOUNTS l2eh88 3/634/19/40 3/834/5/32/45 1/23/413/16/45 LITEPLY 48 1/86150 1/812350 Handling ChargeS300 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Masle Caid peisona/ checks oi COD 4-1/8% Ia Teos US crrency MnnunOrde 51000 ______________I 6] 314 TRIM KNIFE Trim Knfe /5 designed precisely edge trim excess cover /flQ materal ur model Can used outside edges straight curved Blade can set 1/18 101/4 simple adjustment screw Trm Knife wIl make perfect overlap bus seams Works cover, g materials 6 blades Trim Knife Set includes 6 blades$9 00 Trim Knife Blades 5$3 00 rck No Notches Straight Cuts Heavy duty entra sharp no notch olade Same sze regular blades tip does ties cuBing strip ping thicker materials Great big birds Big Bird Blades box 100 blades$950 Trial sze oaciaoe 120 bladeol$250 addition left foot sometimes itches like crazy very small area far has no evidence welts believe am now allergic cyanoacrylate glue recent articles have read may dermatographism believe majority modelers use above glues will sooner later experience some degree allergic reaction Its just some individuals resistant others recently talked two people 14 years ago did believe warning concerning epoxy glue Recently both broke out severe rashes like cannot exposed anymore epoxy glue Also February 1987 Safety column cluded warning Graham Hicks about plac ing epoxy microwave oven order heat make easier spread response Gra hams warning received letter Maxwell Todd Columbus GA also bad experi ence heating cured epoxy Maxwell following say winter 1982 shortly after building first RC model airplane decided loosen up some cured epoxy heating propane torch epoxy question some used secure metal clevis onto throttle cable stead soldering it cured least two three months time inci dent Anyway heated wire clevis epoxy torch soften As pulling clevis off wire still heating torch epoxy caught fire flame lasted few seconds before extinguished smell horrible air filled small floating pieces black carbon-like matter opened window Continued page 18 Hoi3y Horn Old Timer IJLIa born JJq4i 1/id ~wi~LalZo8 Gas Moan 1951 BROOKLYN DODGER 55 Cabin 5"NEWEST5 Retail $529555INTROOUCTORY PRICE $3969 1930 Record Breaker 96 $6956 1939 Zipper 5855356 1930 Kloud King 63 $8236 18141 Brigidier 56 SSO76 1981 Super Quaker 70 $7276 1950 So Long 50$3936 1936 Buccaneer 85 $0996 1930 Clipper MKI 72$5t06 1937 Dallaire 108 $75 16 1938 Miss America 84 $7196 1851 Ptayby Sr 00 $5116 1981 Playboy Jr 55 $3116 1530 Powerhouse 85 $5306 1950 Sailplane 78 $8476 1938 Trenton Terror 72 $5076 1940 Ranger 56$3196 1939 Korda Wake 55 $1916 1939 Mercury 72 6 Thee kit qualify far SAM events 1FF 5 RIG feature highest quaScy machine cut S anded part 5uperior t Competition sheet strip wood wire 6 window ,ateriat Plans orig PP models easily convertible 3cb R/G KITS Sailplane Electric power Gas Hobby Horn SENSOAR Glider 78 $1808 Midway Model GNOME RIG Hand Launch Glider$2500 Jo6y Models FLINGER R/C HLG 50 Span$2505 Midway Model FAST 80018 Acrobatic /05 Elec$t900 Jolly Madels ELECTRICUS Electric Glider 05s$3250 Leisure PLAYBOY SR 67 Gear 05 Elect $3000 Astro ASTRO SPORT 37 Direct 05 Elect $2350 Leisure WASP 37 Direct 95 Electrics$2359 Miway ULTRA MK IV 06 Geared 05 EP $3969 Midway FLYING QUAKER 84 5055 8 stroke $6576 5ks/Midmay DENNY JR 72 Alum Comet5639% Sks/Midwav BUZZARD BOMBSHELL 72$519 PULL LINE OP ELECTRIC SYSTEMS 0 Parts Avail 5lfll-IINb 8 HAPIULINli Up $890 add $150 $091 $2060 add $225 $2051 $5500 add $360 $5501 $7096 add $350 over $7660 add $496 CA Addressees add 6% tax Send MO Visa/MC#Exp Check allow up 30 days CK clearance CoD Exact Charges plus $156 HdI Cash Only] 16 Model Aviation 64 Page CATALUUUE $209 PP/lst Class copy wifl sent 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B blade gives t acceso Cuts weed plastIc melal HARDENED MUSIC WIRE extra htades-3/S199 room left area air out went living room feeling quite nauseated fumes burned epoxy thought just sickening smell sat down watch TV Within two minutes dizzy feeling like going faint Within five minutes dizziness gone hor rible headache felt someone driving 16-penny nail cranium headache lasted several hours before going away have never allergic glues type epoxy causes no problems whatsoever get onto hands working knew im mediately after headache appeared burning epoxy poisoned through con taminated air room no other aftereffects have other problems since incident guarantee will never heat epoxy again Before leaving subject chemical hazards Id like ask reader has answer question contained letter received Den nis Weatherly modeler Auburn WA Dennis following say have using CyA glues several years have problem accelerators came out decided give try seined time used accelerator after about 15 minutes would get sharp pain chest shortness breath splitting headache symptoms would pass after about half hour occurred after used accel erator wasnt sure what happening quit using About month later cleaning tape drive computer work using Freon TF spray can 15 minutes experienced same Continued page 20 18Model Aviation Carry Largest Only Stock Kralt Parts World rstt alive working KRAFT MIDWEST ILL FLAT Authorized Warranty Service FREOIJENCY CONVERSION alone 5255with repair 5105 DIeco.nt Dunt oOtwnreIon end 1 extr8 Alt tuning done epectrum unetyxer. 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HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft 3595 True Olde Japanese Tissue 10 3 colors 5 Japanese Tissue 12 6 colors3335 Microlite Plain .. 3225 Silver .. 3395 Microfilm Glue81U Solvent Condenser Paper 3 sheets ...... 3375 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thnt 065 ... 1175 3132t11ru5132each 3195 Winder 61 295 Mark 1161 195 Complete Line Brown CO2 Motors Balsa Wood Outdoor & Indoor Sheets & Stops Add 10% Postage mum Postage 3150 COMPLETE CATALOG 3159 Model SuPply C9 105! DETROIT AVENUE CLEVELAND OHIO 44102 1ORE POWERTh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESEUZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm and 930 pm EST DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion4 hnology since 1976 previous Safety columns Ive mentioned potential hazard getting jacket drawstrings transmitter neck-straps caught rotating props Dennis account zipper incident Ive heard before aware loose clothing may get sucked prop arc thereby result eye face injuty close Fail-safe devicespro con Several times previous Safety columns Ive discussed fail-safe devices intended minimize eliminate loss control RC model event radio interference equipment failure de vices come forms add-on ac cessories some built radio itself Such fail-safe device subject recent letter Athens Greece sent An tonis Papadopoulos will see fol lowing account Antonis questions merits such devices would like describe what happened clubs field week ago Helicopter flier using top-line radio system built-in fail safe features tryingto adjust engine new Hirobo Shuttle model sitting Continued page 146 Extra 230 Two Popular Sizes 1/3 1/4 Standoff Scale 1/3 Scale Wing Span nches Wing Area 1300 sq/in Power20 cu no hardware $19995 ship Partial Kit$11995 $8 ship Plans$2000 $3 ship Cowl$2995 $3 ship Canopy$2000 $3 ship Landing Gear$1995 $3 ship Foam Parts wing & decks$45 00 hip Decals pac$500 hip 1/4 Scale Wing Span72/2 inches Wing Area855 sqIin Power61 2-C 120 4-C Kit wheel pants & decals md $16995 hip Plans $2500 Cowl $2495 Wheel Pants $1500 Landing Gear $1250 Foam Parts wng & decks $4000 Canopy$1000 Decals pac $5 00 $3 ship $3 ship $3 ship $3 ship $8 ship $3 ship $1 ship CASH Y ORDER CERTIFIED CHECK 3 weeks personal checks VISA ERCARD ACCEPTED SEND SASE FOR MORE INFORMATION 712-943-4102 R/C EXTRAS RR #1 Box 288 Sergeant Bluff IA 51054 22 Model Aviation coat unzipped bottom edge coat getting pulled toward prop came around wing tip warn just leaned forward tweak needle felt tug friend fell ground zipper jacket pulled prop ripped zipper slide off threw friends face hitting him corner eye wife club members nurse bandaged up eye before rushed hospital accident cost buddy sight eye SPECILISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 05 IS & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD COX ENGINES IF ITS COX ENGINE CALL US! FREE FUGHT K&B CUSTOMIZED ENGINES ALSO COMPLETE LINE OF U/C & R/C RACING PARTS SOLID UNES RACING WHEELS QUICK FILLS AND MORE.. WE ALSO STOCK KLOTZ OIL BROAD RANGE OF GLOW PLUGS SPECIAL FUEL TUBING & HARD-TO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES CARBON FIBER COILS PLUGS CONDENSERS SILK TIMERS TRANSISTOR IGNITION SYSTEMS l/2A TEXACO ENGINES EVERYTHING YOU NEED FOR OLD TIMER INCLUDING REPLICA OR WiCK ENGINES NE WI! 1/2A PLAYBOY SR FOR l/2A TEXACO R/C FF ELECTRIC OR SPORT KIT $2995 Safety/Preston Continued page 22 ground After couple minutes engine nmning perfectly throttled back ofasuddenthe Heicopterenginestartedtorev up seconds hovering nicely boom deviation Moments later started climbing What first flight No need trim no need touch control sticks no need transmitter eithet What happened turned out battery voltage dropped below safe level fail-safe devices took control As result Helicopter became just point sky After engine stopped started coming down Hi roho must very proud because after autorotation Helicopter landed minor damage question after What reason fail-safe switches devices since dont know time attitude model really going use would like know readers have reported anything favor device really want opinion switch secondary frequency during emer gency because purpose lose control rather have control surfaces model move preset positions am familiar radio system involved seems fail-safe device throttle reversed drop battery voltage level unsafe should have closed throttle rather opened However issue question Antonis has asked readers What wants know advantage having con trol surfaces go preset position neutral case flying controls event trans mitter signal lost whatever reason Cer tainly isnt going help Aerobatic flier save model control surfaces suddenly go neutral middle complex maneuver other hand Im favor having engine go low throttle upon loss transmitter signal receiver battery voltage drops below safe level readers wish express opinions Id welcome letters Have safe month John Preston 2812 Northampton Sr N W Washington DC 20015 responding advertisers mention thatyou read aboutthem ModelAviation Doubler/Shepherd Continued page 36 be mowed grass little too tall lettering model done dry transfers art supply store coat clear Sig Skybrite applied over protection sponsor decals canopy model auto decal sheets pilot head started out Williams Bros figure back side goggles painted black enamel give appearance sunglasses am pleased way project has turned out easy build flies very nicely will either clip current wing build another reduced span will also trying other engines model ing event becoming quite popular local clubs 500 sport racer stock Royal 25s HR 25s clippedwing version should fit right expanding Pylon Racing event model qsite change pace decide build hope will have fun enjoy Remember fourcycles dont scream just putt-putt Radio Technique/Myers Continued page 39 FCC time will able tell whether system contemplating has certificated according AMA Guidelines Right now have nothing Resource managemenl Noninterfrring RC channel arrangements think Dennis Tier ney has best solution See Whistle Blows Dont Fly page 93 et seq Model Aviation March 1987 urge Dennis con tinue working design until includes 80 RC channels scheduled 1991 well seven old channels 27 MHz 50 MHz 53 MHz channels Besides should reduce wiring double-sided PC board will put him position sell useful gimmick RC airplane boat car clubs over United States Canada have feeling once people see easily Dennis gadget works organization will want Its sort self-policing transmitter impound manager Go Dennis 146 Model Aviation OUR REV-UP INVENTORY AVERAGES 12000 PROPSIII SEE OUR AD LAST MONTH FOR LIST OF PROPS AND PRICES ding iiThg ring. AJ iNTERCEPTOR4e9S compiete U-build Kit photos easy instructions NOTEPLE*SEAOO 5300 O P00*0f S DANOCING nESt 00E URUILD OES ADO TEN PERCENT OP PEICE POD EACA ADbrtIONAL ~CRAFT COMPANY RO Box 68132 Portland OR 97268 1000/0 Satisfaction Ouaraneea Money Back SEND 450 per 5/8 ID Coupler or550per3/4ID DANA AEROSPACE CORP 1110 E 5th St rior WI 54880 OLD TIMER SUPPLIES ORDER DY MAIL OR PHONE 714 830-5162 SOAR V NO COD VISA MASTERCARD WELCOME DEALER INQUIRIES INVITED ALL PRICES POSTPAID MINIMUM ORDER *1000 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HAS EAI R~ifl#MT0 Aflfl * TA V