John Preston___________________________ Safety Comes First about warning labels pinned props fourstroke engines RC frequency flag problem WARNING LABELS April 1986 issue magazine reprinted letter David Lewis suggested RC equipment should carry warning label pictorially other wise would identify whether its frequency assigned aircraft models surface boat/car models David felt such labels would minimize sales radios frequencies illegal intended use forwarded Davids suggestion chair man AMA Safety Committee Jim McNeill enclosed letter stated felt suggestion should pursued pleased see Johnny Clemens District VIII VP report August 1986 issue such labels will soon appear RC equipment identifying its legal use recently received letter reader subject warning labels may interest some readers writer shall remain nameless believed recent FAA proposal owners certain Cessna aircraft some what absurd FAA proposal would require among other things posting warning label planes instrument panel advisingthe pilot sure seat latched properly before taxiing taking off landing Perhaps such label absurd response readers letter pointed out possible reason FAA proposal said may have originated proposal Cessna presumably aware inci dents pilots seats latched properly prior taxi takeoff landing Failure warn against potential hazard has apparently grounds number successful product liability suits against manu facturers incorrect use product its owner does let manufacturer off hook Example safety label laid out format suugested American National Stan dard soon published Theres quite bit about column should injury-producing accident occur Again failure manufacturer wam user about consequences incorrect use may grounds lawsuit regular job Federal regulatory agency No FAA have recently involved development waming labels several products According labeling ex perts isnt sufficient rely mere statement says Dont Dont consequences obeying message label should also present Very shortly American National Stan dards Institute will publishing voluntary standard ANSI z5354 Product Signs Labels Safety labels developed accordance provisions standard must contain following elements 1 Signal Word Typical words Danger Warning Caution selection appropriate word depends seriousness hazard label identifying Signal words should colored background red Danger orange Warning yellow Caution 2 Hazard Alert SymboL symbol internationally-recognized exclamation mark ing Look Out placed within triangular border located immediately front signal word 3 Pictorial Some hazards can illustrated pictorially Typical among fire electro cution radiation hazards However modeling hazards may difficult identify pictorial symbol Such symbol optional 4 IdentUlcation Hazard verbal message concisely identifies haz ard first verbal message afterthe signal word 5 Result Ignoring Warning tells reader what might happen warning ignored typical example message related modeling product might lacera tions hand fingers caused contact rotating prop 6 Avoiding Hazard last part label tells reader avoid hazard Elsewhere months column warning label follows provisions set forth draft ANSI labeling standard might value prop manufacturers Im suggesting label should used boxes props because think fingers-in-the-prop haz ard pretty obvious Im saying label could used Pinned props February 1985 Safety column strongly recommended owners four-stroke engines equipped propeller drive pins prop drive washer should remove pins time received number reports blades shattering pinned drive plate four-stroke engine usually 60-size backfired Unfortu nately such prop pinned drive Continued page 18 16 Model Aviation CAUTION ROTATING PROPELLERS CAN CAUSE SERIOUS LACERATIONS TO HAND OR FINGERS ENGINE MIXTURE ADJUSTMENTS SHOULD BE PERFORMED FROM BEHIND THE PROPELLER ARC 1 MAYBE THESE WARNIN6- LAEL$ SHOULD 1-JAVE HAD WARNING LABELS Ua AA WE ARE SHOOTING DOWNjJ* CUSTOM CUT CONTEST BALSA HIGH BALSA PRICES*All Sheets Piece ed Close Tolerances WITH SUPER QUALITY A Grade Dried ped 100% Satisfaction Guaranteed rious modeler want performance Direct Only must try 4-6 lb balsa BALSA SHEETS N ALSASTICKS 3648LIGHT4-6 LBBASSWOOD 48PINESTICKS N 48 HARD MAPLE 18 1/162331/16, 1/4093/163/1626181/813171/4 3/840 3/322 40 1/16 3/8 10 BALSA TRIANGLES36 WOOD363/16 1/43018141623 I3/83/848 1/6 2431/16 1/2141/41/4281/333483/163/8381/83828 27 3/81/250 3/162493/32 1/4103/83/8381/283483/181/2483/163/16II 243/83/408 1/4 2563/32 3/8121/21/2381/163493/163/4603163823 321/23/468 1/323373/32 1/2163/43/4463/323561/4 1/4423/161238 40 1/283371/8 1/8081 1551/83871/43/8491/41428 37 1/1633749311/8 1/411163/163761/43/48014383o42BIRCH DO WELS36 3/3234458 371/8 3/812 18BALSA PLANKS36 1/43883/83/8601/41234 47109 1/8 35471451/8 1/218 2411853/831153/81/278383837 523/1611 3/1636282 553/163/1611 16121501/231383/83/4901414 1/4 37395 613/16 3/817132003/432201/21/2905/1625 5/163653/16 1/22238142801 33001/23/4 150 SPRUCESTPCKS3848 3/832 3/8 388 124 711/4 1/416 2411/232751/1647818 1/615 1/2 3110 1551/4 3/819 2611/243403/324911/8 1418 24 3/4 31651/4 1/221 30222251/84100BUNGLEDEALS1/6 3/828 283PLYBIRCH 48 1/1645676 481/4 3/434 44233253/1641173/163/1625 34 3/324,,,,,,i,201/63386851/6412520 1/3212425 1/8 480 106 665/1651621 2633495 3/84207201/16438 102014 1431 45 3/16493 122 753/8 3/827 37346881/24282203/323366414 3/81/1612435 1/4 4110 134 843/8 1/232 46153/3243803/6 3/845 63 2450 3/6 4165 2253/6 3/442 55TAPEREDSHEETS 38151/83387153/8 1/255 70 1/2 4225 2613/81521/4265TRAJLINO EDGE 38101/843867512 1/280 88 BATCHED SHEETS1/2 1/2531/43851/4132153/1633655012 3/468 88 36 5PLYBIRCN 48 12 3/446 823/8268 5/1611/439103/164368103/3212570 3/3241081/21503/8398 3/811/246101/43366301/812565 1/841085/8 5/8481/23128 1/2270101/4438890 SPRUCETRIANOLES 36 3/1612585 3/1641203/4 3/467103/83368503/83/8451/412650 1/441315-3/84366251/21/261 51/2336540343477 LONE STAR EPOXYINSTANT CL UE51/2436855 9,L/1 8991, Thick28810-3/32448 845GROOVED LC MOUHTS BALSA nul LIIVL 5,,5981, Thi25651/8448485l2Iiwh@S Cmli 806 743-6394 10am ApmCentraIlime15,,5882,TS,k55053/16448585 LITEPLY483/83/4/1/8/40 38,,5962,jrh,55051/44486251/881503/83/4/5/32/40 LONE STAR IVIODELS1/8123081/23/4/3/16/45 1623 57th St Lubbock TX 79412Handling ChargeS3O0 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Mast, Cad persona/ checks,, COD 4-1/8% Ia Teao US crecy Mnin,mOde 01000 II SA53P h keep prop tight hub Almost time Itried start itwould kick loose same time thought should check valve tappet clearance engine Both tappets found too snug adjusted clearance found engine behaved much better during starting pins could always tum prop nut about five six degrees tighten after flight Evidently engine first indica tion valve tappet adjustment off encounter excess detonation starting own safety clearances should checked two other engines encountered loss power tappets out adjustment would surmise case 12 tappets get off coming compression sooner sup posed Hence detonation several other brands 2s use locally having problems have encountered Im using will probably buy another engine size darn sure going same brand last would absolutely recommend prop pins removed brand engine remove courting disaster am under impression prop pins left just matter time before engine gets good like idea gasoline However engine Ive telling about headed ignition $125 will cost go route long run going much cheaper less painful fooling around engine its present form think minimize danger tappets engine should checked three four runs Continued page 20 plate engine backfires will generally cause prop nut prop washer prop itself thrown off solution latter problem suggested Bill Hoffmeister November 1985 Safety column use prop nut locking insert Nylok equivalent brand followed controversy over whether such props should pinned During past month received letter Em Milenberg proprietor Ems R/G Shop Ft Dodge IA Em has number four-stroke engines likes However has 1 2-cu-in engine says has some rather unpleasant traits letter related following account articles suggested engines pins prop hub should have pins removed because could split prop So dutifully removed pins got engine Late last summer having trouble getting engine started fairly new thought would use starter have done occasions other engines response instantaneous spinner went flying prop came off hit upper part chest cut shirt undershirt put welt chest broke tip off prop Five six inches higher would have gotten neck So much using starter critter used engine several times last fall again spring another incident taxied out runway checking controls before taking off engine stopped Ni-Cd starter battery pocket restarted engine As getting up prop came flying off hit twice leg decided pins going back prop hub having terrible time trying 18 Model Aviation POSI CURE CYANQACRYLATE wr1 -urn - r u-i i 1ra dlii WUWJ m A &am SPECIAL INTRODUCTORY OFFER ListSaleSavings 1 ozFast Cure 3-5 Sec4955000 Off 2 ozFast Cure 3-5 Sec895$39656% Off 1 ozGap-Filling -t- 10-25 Sec$2495QO/ Off 2 ozGap-Filling 5 Sec895$3965600 Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion w thin 30 days full refundNo qusad SHELDONS HOBBY SHOP A kAe S nJose CA95 2 FOR ORDERS ONLY PLEASE 800 228-3237 251-0789 INFO 408 251-0787 Clt rn ord r Hour Mon-Wed Fri & Stt 930-530 F X1 ER\iCF thur 930-900 1200500 COD ADD $190 seems running OK means leave prop pins anyone 12 four-stroke engine has experienced similar problems Em wishes write about experiences would welcome letters desire response please enclose SASE Meanwhile controversy pinned props versus nonpinned props four-stroke engines remains Again am very receptive mail subjectespecially manufacturers im porters such engines Frequency flags Another letter received during last month draws attention what its author regards very serious safety problem Bob Cardone following say past month have seen least five people come flying field new radios specific manufacturer no frequency flags questioned people flags transmitters said radios didnt come Last week three people flags flying same time believe manufacturers policy will cause accidents due peoples having flags flying anyway think frequency flag should required part radio system happen agree Bob very least radio manufacturer/importer can ensure safe flying operations supply appropriate frequency flag other hand shoulders safe operations really rest manufacturer/importer ultimate owner/operator Since Im engineer rather lawyer really dont have answer question Perhaps responsibility vendor mail-order house hobby shop RC equipment supplyor point out need forfrequency-identification flags FCC does require frequency flags displayed transmitter antennas order operator conformance regula tions AMA rule page 127 current 1986-87 AMA rule book states Figure 1 describes frequencies flags authorized CB channels old PRS frequencies old Amateur frequencies rule book also states same page Figure 2 describes frequen cies flags new RC channels authorized use AMA-sanctioned competitions interpretation again engineer rather lawyer statements AMA rule book whoever supervising flight opera tions RC models responsible ensuring appropriate frequency-identification flags displayed individual modelers Id interested hear comments statement modelers lawyers Id also like know individual AMA member stands regard AMA insurance coverage flies RC model display ing appropriate frequency flag trans mitter antenna requirement RC flying activities just AMA-sanctioned events responsibility RC club supervises flying-field operations ensure fliers display correct frequency flags transmitter antennas Any mail received subject will discussed future Safety column Wing strut failures following letter William Page California modeler subject wing-strut-attachment failures received last month needs no explanation partContinued page 22 20 Model Aviation oFcIJ SKY D[VI[ 65 Ignition Approved 90 Day Warranty Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug alit iesidtnt add 6% sales tax ORDR DIRICT T&D RESEARCH AssoclAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 SI FOR BROCHURE TaylorCraft Full span 108 Area 1670 Clipped 84 Area 1300 Power 75 12 Cu Beige 8 Ply 2 lbs $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu $9996 Super Kwik FIi Span 70 Area 927 Power 75 12 CU 10 $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 CU $9996 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7995 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2104644610 would like call attention some thing estimation serious safety violation sale use electricalequipment solder lugs wing-strut fittings RC models practice being followed two kit manufacturers solder lugs sup plied kits advertised ads club have two solder-lug failures have very fortunate cases since noticed before accident case two lugs failed -scale biplane occurred during first two flights actually saw wing moving flight have done electrical work know solder lugs made copper plated make easier solder might think appearance made steel As perhaps know copper work-hardens breaks readily dont know lugs bipe work-hardened flexing wing vibration either would have enough cause failure am certain anything made thin copper should used manner am also certain insurance underwriters would appalled knew being done Bills letter did identify names two manufacturers alleges supplying copper solder lugs wing-strut fittings Since have built kit models either manufac turer cannot comment adequacy strut fittings However intend send copies Bills letter identified manufacturers ask comments Safety equipment few days ago received sample new product being marketed Pelican Enterprises Inc Bloomingdale IL Ive mentioned company previously because supply variety products safetyrelated new product havent chance use yet called *202 After Flight Exhaust Cleaner comes 14-oz aerosol can intended remove exhaust goo collects glow-engine-powered models during flight Maybe some questioning product relates safety Let remind incident described ago Bill Winters Just Fun column Bill attempting hand-launch Old-Timer Sniffer model hand slipped gooey fuselage fed fingers through prop After incident Bill added high-friction panels either side fuselage ald grip launching model Pelicans #202 might another solution problem Have safe month John Preston c/o AMA 1810 Samuel Morse Dr Reston VA 22090 22 Model Aviation ROUSH KITS * SCALE DOCUMENTATION* SCALE DRAWINGS MODEL PLANS HPLA-1EcH AIRPLANE CATALOG~ INTERNATIONAL OVER 108 PAtIOS48500 MC KENZIE HWY S3OOVIDA OREGON 97488 PAW DIESELS Englands Finest 049 35 RIC STD Send $100 list Eric Cluttoel 913 Cedar Lane Tullahoma Tenn 37388
Edition: Model Aviation - 1986/11
Page Numbers: 16, 18, 20, 22
John Preston___________________________ Safety Comes First about warning labels pinned props fourstroke engines RC frequency flag problem WARNING LABELS April 1986 issue magazine reprinted letter David Lewis suggested RC equipment should carry warning label pictorially other wise would identify whether its frequency assigned aircraft models surface boat/car models David felt such labels would minimize sales radios frequencies illegal intended use forwarded Davids suggestion chair man AMA Safety Committee Jim McNeill enclosed letter stated felt suggestion should pursued pleased see Johnny Clemens District VIII VP report August 1986 issue such labels will soon appear RC equipment identifying its legal use recently received letter reader subject warning labels may interest some readers writer shall remain nameless believed recent FAA proposal owners certain Cessna aircraft some what absurd FAA proposal would require among other things posting warning label planes instrument panel advisingthe pilot sure seat latched properly before taxiing taking off landing Perhaps such label absurd response readers letter pointed out possible reason FAA proposal said may have originated proposal Cessna presumably aware inci dents pilots seats latched properly prior taxi takeoff landing Failure warn against potential hazard has apparently grounds number successful product liability suits against manu facturers incorrect use product its owner does let manufacturer off hook Example safety label laid out format suugested American National Stan dard soon published Theres quite bit about column should injury-producing accident occur Again failure manufacturer wam user about consequences incorrect use may grounds lawsuit regular job Federal regulatory agency No FAA have recently involved development waming labels several products According labeling ex perts isnt sufficient rely mere statement says Dont Dont consequences obeying message label should also present Very shortly American National Stan dards Institute will publishing voluntary standard ANSI z5354 Product Signs Labels Safety labels developed accordance provisions standard must contain following elements 1 Signal Word Typical words Danger Warning Caution selection appropriate word depends seriousness hazard label identifying Signal words should colored background red Danger orange Warning yellow Caution 2 Hazard Alert SymboL symbol internationally-recognized exclamation mark ing Look Out placed within triangular border located immediately front signal word 3 Pictorial Some hazards can illustrated pictorially Typical among fire electro cution radiation hazards However modeling hazards may difficult identify pictorial symbol Such symbol optional 4 IdentUlcation Hazard verbal message concisely identifies haz ard first verbal message afterthe signal word 5 Result Ignoring Warning tells reader what might happen warning ignored typical example message related modeling product might lacera tions hand fingers caused contact rotating prop 6 Avoiding Hazard last part label tells reader avoid hazard Elsewhere months column warning label follows provisions set forth draft ANSI labeling standard might value prop manufacturers Im suggesting label should used boxes props because think fingers-in-the-prop haz ard pretty obvious Im saying label could used Pinned props February 1985 Safety column strongly recommended owners four-stroke engines equipped propeller drive pins prop drive washer should remove pins time received number reports blades shattering pinned drive plate four-stroke engine usually 60-size backfired Unfortu nately such prop pinned drive Continued page 18 16 Model Aviation CAUTION ROTATING PROPELLERS CAN CAUSE SERIOUS LACERATIONS TO HAND OR FINGERS ENGINE MIXTURE ADJUSTMENTS SHOULD BE PERFORMED FROM BEHIND THE PROPELLER ARC 1 MAYBE THESE WARNIN6- LAEL$ SHOULD 1-JAVE HAD WARNING LABELS Ua AA WE ARE SHOOTING DOWNjJ* CUSTOM CUT CONTEST BALSA HIGH BALSA PRICES*All Sheets Piece ed Close Tolerances WITH SUPER QUALITY A Grade Dried ped 100% Satisfaction Guaranteed rious modeler want performance Direct Only must try 4-6 lb balsa BALSA SHEETS N ALSASTICKS 3648LIGHT4-6 LBBASSWOOD 48PINESTICKS N 48 HARD MAPLE 18 1/162331/16, 1/4093/163/1626181/813171/4 3/840 3/322 40 1/16 3/8 10 BALSA TRIANGLES36 WOOD363/16 1/43018141623 I3/83/848 1/6 2431/16 1/2141/41/4281/333483/163/8381/83828 27 3/81/250 3/162493/32 1/4103/83/8381/283483/181/2483/163/16II 243/83/408 1/4 2563/32 3/8121/21/2381/163493/163/4603163823 321/23/468 1/323373/32 1/2163/43/4463/323561/4 1/4423/161238 40 1/283371/8 1/8081 1551/83871/43/8491/41428 37 1/1633749311/8 1/411163/163761/43/48014383o42BIRCH DO WELS36 3/3234458 371/8 3/812 18BALSA PLANKS36 1/43883/83/8601/41234 47109 1/8 35471451/8 1/218 2411853/831153/81/278383837 523/1611 3/1636282 553/163/1611 16121501/231383/83/4901414 1/4 37395 613/16 3/817132003/432201/21/2905/1625 5/163653/16 1/22238142801 33001/23/4 150 SPRUCESTPCKS3848 3/832 3/8 388 124 711/4 1/416 2411/232751/1647818 1/615 1/2 3110 1551/4 3/819 2611/243403/324911/8 1418 24 3/4 31651/4 1/221 30222251/84100BUNGLEDEALS1/6 3/828 283PLYBIRCH 48 1/1645676 481/4 3/434 44233253/1641173/163/1625 34 3/324,,,,,,i,201/63386851/6412520 1/3212425 1/8 480 106 665/1651621 2633495 3/84207201/16438 102014 1431 45 3/16493 122 753/8 3/827 37346881/24282203/323366414 3/81/1612435 1/4 4110 134 843/8 1/232 46153/3243803/6 3/845 63 2450 3/6 4165 2253/6 3/442 55TAPEREDSHEETS 38151/83387153/8 1/255 70 1/2 4225 2613/81521/4265TRAJLINO EDGE 38101/843867512 1/280 88 BATCHED SHEETS1/2 1/2531/43851/4132153/1633655012 3/468 88 36 5PLYBIRCN 48 12 3/446 823/8268 5/1611/439103/164368103/3212570 3/3241081/21503/8398 3/811/246101/43366301/812565 1/841085/8 5/8481/23128 1/2270101/4438890 SPRUCETRIANOLES 36 3/1612585 3/1641203/4 3/467103/83368503/83/8451/412650 1/441315-3/84366251/21/261 51/2336540343477 LONE STAR EPOXYINSTANT CL UE51/2436855 9,L/1 8991, Thick28810-3/32448 845GROOVED LC MOUHTS BALSA nul LIIVL 5,,5981, Thi25651/8448485l2Iiwh@S Cmli 806 743-6394 10am ApmCentraIlime15,,5882,TS,k55053/16448585 LITEPLY483/83/4/1/8/40 38,,5962,jrh,55051/44486251/881503/83/4/5/32/40 LONE STAR IVIODELS1/8123081/23/4/3/16/45 1623 57th St Lubbock TX 79412Handling ChargeS3O0 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Mast, Cad persona/ checks,, COD 4-1/8% Ia Teao US crecy Mnin,mOde 01000 II SA53P h keep prop tight hub Almost time Itried start itwould kick loose same time thought should check valve tappet clearance engine Both tappets found too snug adjusted clearance found engine behaved much better during starting pins could always tum prop nut about five six degrees tighten after flight Evidently engine first indica tion valve tappet adjustment off encounter excess detonation starting own safety clearances should checked two other engines encountered loss power tappets out adjustment would surmise case 12 tappets get off coming compression sooner sup posed Hence detonation several other brands 2s use locally having problems have encountered Im using will probably buy another engine size darn sure going same brand last would absolutely recommend prop pins removed brand engine remove courting disaster am under impression prop pins left just matter time before engine gets good like idea gasoline However engine Ive telling about headed ignition $125 will cost go route long run going much cheaper less painful fooling around engine its present form think minimize danger tappets engine should checked three four runs Continued page 20 plate engine backfires will generally cause prop nut prop washer prop itself thrown off solution latter problem suggested Bill Hoffmeister November 1985 Safety column use prop nut locking insert Nylok equivalent brand followed controversy over whether such props should pinned During past month received letter Em Milenberg proprietor Ems R/G Shop Ft Dodge IA Em has number four-stroke engines likes However has 1 2-cu-in engine says has some rather unpleasant traits letter related following account articles suggested engines pins prop hub should have pins removed because could split prop So dutifully removed pins got engine Late last summer having trouble getting engine started fairly new thought would use starter have done occasions other engines response instantaneous spinner went flying prop came off hit upper part chest cut shirt undershirt put welt chest broke tip off prop Five six inches higher would have gotten neck So much using starter critter used engine several times last fall again spring another incident taxied out runway checking controls before taking off engine stopped Ni-Cd starter battery pocket restarted engine As getting up prop came flying off hit twice leg decided pins going back prop hub having terrible time trying 18 Model Aviation POSI CURE CYANQACRYLATE wr1 -urn - r u-i i 1ra dlii WUWJ m A &am SPECIAL INTRODUCTORY OFFER ListSaleSavings 1 ozFast Cure 3-5 Sec4955000 Off 2 ozFast Cure 3-5 Sec895$39656% Off 1 ozGap-Filling -t- 10-25 Sec$2495QO/ Off 2 ozGap-Filling 5 Sec895$3965600 Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion w thin 30 days full refundNo qusad SHELDONS HOBBY SHOP A kAe S nJose CA95 2 FOR ORDERS ONLY PLEASE 800 228-3237 251-0789 INFO 408 251-0787 Clt rn ord r Hour Mon-Wed Fri & Stt 930-530 F X1 ER\iCF thur 930-900 1200500 COD ADD $190 seems running OK means leave prop pins anyone 12 four-stroke engine has experienced similar problems Em wishes write about experiences would welcome letters desire response please enclose SASE Meanwhile controversy pinned props versus nonpinned props four-stroke engines remains Again am very receptive mail subjectespecially manufacturers im porters such engines Frequency flags Another letter received during last month draws attention what its author regards very serious safety problem Bob Cardone following say past month have seen least five people come flying field new radios specific manufacturer no frequency flags questioned people flags transmitters said radios didnt come Last week three people flags flying same time believe manufacturers policy will cause accidents due peoples having flags flying anyway think frequency flag should required part radio system happen agree Bob very least radio manufacturer/importer can ensure safe flying operations supply appropriate frequency flag other hand shoulders safe operations really rest manufacturer/importer ultimate owner/operator Since Im engineer rather lawyer really dont have answer question Perhaps responsibility vendor mail-order house hobby shop RC equipment supplyor point out need forfrequency-identification flags FCC does require frequency flags displayed transmitter antennas order operator conformance regula tions AMA rule page 127 current 1986-87 AMA rule book states Figure 1 describes frequencies flags authorized CB channels old PRS frequencies old Amateur frequencies rule book also states same page Figure 2 describes frequen cies flags new RC channels authorized use AMA-sanctioned competitions interpretation again engineer rather lawyer statements AMA rule book whoever supervising flight opera tions RC models responsible ensuring appropriate frequency-identification flags displayed individual modelers Id interested hear comments statement modelers lawyers Id also like know individual AMA member stands regard AMA insurance coverage flies RC model display ing appropriate frequency flag trans mitter antenna requirement RC flying activities just AMA-sanctioned events responsibility RC club supervises flying-field operations ensure fliers display correct frequency flags transmitter antennas Any mail received subject will discussed future Safety column Wing strut failures following letter William Page California modeler subject wing-strut-attachment failures received last month needs no explanation partContinued page 22 20 Model Aviation oFcIJ SKY D[VI[ 65 Ignition Approved 90 Day Warranty Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug alit iesidtnt add 6% sales tax ORDR DIRICT T&D RESEARCH AssoclAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 SI FOR BROCHURE TaylorCraft Full span 108 Area 1670 Clipped 84 Area 1300 Power 75 12 Cu Beige 8 Ply 2 lbs $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu $9996 Super Kwik FIi Span 70 Area 927 Power 75 12 CU 10 $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 CU $9996 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7995 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2104644610 would like call attention some thing estimation serious safety violation sale use electricalequipment solder lugs wing-strut fittings RC models practice being followed two kit manufacturers solder lugs sup plied kits advertised ads club have two solder-lug failures have very fortunate cases since noticed before accident case two lugs failed -scale biplane occurred during first two flights actually saw wing moving flight have done electrical work know solder lugs made copper plated make easier solder might think appearance made steel As perhaps know copper work-hardens breaks readily dont know lugs bipe work-hardened flexing wing vibration either would have enough cause failure am certain anything made thin copper should used manner am also certain insurance underwriters would appalled knew being done Bills letter did identify names two manufacturers alleges supplying copper solder lugs wing-strut fittings Since have built kit models either manufac turer cannot comment adequacy strut fittings However intend send copies Bills letter identified manufacturers ask comments Safety equipment few days ago received sample new product being marketed Pelican Enterprises Inc Bloomingdale IL Ive mentioned company previously because supply variety products safetyrelated new product havent chance use yet called *202 After Flight Exhaust Cleaner comes 14-oz aerosol can intended remove exhaust goo collects glow-engine-powered models during flight Maybe some questioning product relates safety Let remind incident described ago Bill Winters Just Fun column Bill attempting hand-launch Old-Timer Sniffer model hand slipped gooey fuselage fed fingers through prop After incident Bill added high-friction panels either side fuselage ald grip launching model Pelicans #202 might another solution problem Have safe month John Preston c/o AMA 1810 Samuel Morse Dr Reston VA 22090 22 Model Aviation ROUSH KITS * SCALE DOCUMENTATION* SCALE DRAWINGS MODEL PLANS HPLA-1EcH AIRPLANE CATALOG~ INTERNATIONAL OVER 108 PAtIOS48500 MC KENZIE HWY S3OOVIDA OREGON 97488 PAW DIESELS Englands Finest 049 35 RIC STD Send $100 list Eric Cluttoel 913 Cedar Lane Tullahoma Tenn 37388
Edition: Model Aviation - 1986/11
Page Numbers: 16, 18, 20, 22
John Preston___________________________ Safety Comes First about warning labels pinned props fourstroke engines RC frequency flag problem WARNING LABELS April 1986 issue magazine reprinted letter David Lewis suggested RC equipment should carry warning label pictorially other wise would identify whether its frequency assigned aircraft models surface boat/car models David felt such labels would minimize sales radios frequencies illegal intended use forwarded Davids suggestion chair man AMA Safety Committee Jim McNeill enclosed letter stated felt suggestion should pursued pleased see Johnny Clemens District VIII VP report August 1986 issue such labels will soon appear RC equipment identifying its legal use recently received letter reader subject warning labels may interest some readers writer shall remain nameless believed recent FAA proposal owners certain Cessna aircraft some what absurd FAA proposal would require among other things posting warning label planes instrument panel advisingthe pilot sure seat latched properly before taxiing taking off landing Perhaps such label absurd response readers letter pointed out possible reason FAA proposal said may have originated proposal Cessna presumably aware inci dents pilots seats latched properly prior taxi takeoff landing Failure warn against potential hazard has apparently grounds number successful product liability suits against manu facturers incorrect use product its owner does let manufacturer off hook Example safety label laid out format suugested American National Stan dard soon published Theres quite bit about column should injury-producing accident occur Again failure manufacturer wam user about consequences incorrect use may grounds lawsuit regular job Federal regulatory agency No FAA have recently involved development waming labels several products According labeling ex perts isnt sufficient rely mere statement says Dont Dont consequences obeying message label should also present Very shortly American National Stan dards Institute will publishing voluntary standard ANSI z5354 Product Signs Labels Safety labels developed accordance provisions standard must contain following elements 1 Signal Word Typical words Danger Warning Caution selection appropriate word depends seriousness hazard label identifying Signal words should colored background red Danger orange Warning yellow Caution 2 Hazard Alert SymboL symbol internationally-recognized exclamation mark ing Look Out placed within triangular border located immediately front signal word 3 Pictorial Some hazards can illustrated pictorially Typical among fire electro cution radiation hazards However modeling hazards may difficult identify pictorial symbol Such symbol optional 4 IdentUlcation Hazard verbal message concisely identifies haz ard first verbal message afterthe signal word 5 Result Ignoring Warning tells reader what might happen warning ignored typical example message related modeling product might lacera tions hand fingers caused contact rotating prop 6 Avoiding Hazard last part label tells reader avoid hazard Elsewhere months column warning label follows provisions set forth draft ANSI labeling standard might value prop manufacturers Im suggesting label should used boxes props because think fingers-in-the-prop haz ard pretty obvious Im saying label could used Pinned props February 1985 Safety column strongly recommended owners four-stroke engines equipped propeller drive pins prop drive washer should remove pins time received number reports blades shattering pinned drive plate four-stroke engine usually 60-size backfired Unfortu nately such prop pinned drive Continued page 18 16 Model Aviation CAUTION ROTATING PROPELLERS CAN CAUSE SERIOUS LACERATIONS TO HAND OR FINGERS ENGINE MIXTURE ADJUSTMENTS SHOULD BE PERFORMED FROM BEHIND THE PROPELLER ARC 1 MAYBE THESE WARNIN6- LAEL$ SHOULD 1-JAVE HAD WARNING LABELS Ua AA WE ARE SHOOTING DOWNjJ* CUSTOM CUT CONTEST BALSA HIGH BALSA PRICES*All Sheets Piece ed Close Tolerances WITH SUPER QUALITY A Grade Dried ped 100% Satisfaction Guaranteed rious modeler want performance Direct Only must try 4-6 lb balsa BALSA SHEETS N ALSASTICKS 3648LIGHT4-6 LBBASSWOOD 48PINESTICKS N 48 HARD MAPLE 18 1/162331/16, 1/4093/163/1626181/813171/4 3/840 3/322 40 1/16 3/8 10 BALSA TRIANGLES36 WOOD363/16 1/43018141623 I3/83/848 1/6 2431/16 1/2141/41/4281/333483/163/8381/83828 27 3/81/250 3/162493/32 1/4103/83/8381/283483/181/2483/163/16II 243/83/408 1/4 2563/32 3/8121/21/2381/163493/163/4603163823 321/23/468 1/323373/32 1/2163/43/4463/323561/4 1/4423/161238 40 1/283371/8 1/8081 1551/83871/43/8491/41428 37 1/1633749311/8 1/411163/163761/43/48014383o42BIRCH DO WELS36 3/3234458 371/8 3/812 18BALSA PLANKS36 1/43883/83/8601/41234 47109 1/8 35471451/8 1/218 2411853/831153/81/278383837 523/1611 3/1636282 553/163/1611 16121501/231383/83/4901414 1/4 37395 613/16 3/817132003/432201/21/2905/1625 5/163653/16 1/22238142801 33001/23/4 150 SPRUCESTPCKS3848 3/832 3/8 388 124 711/4 1/416 2411/232751/1647818 1/615 1/2 3110 1551/4 3/819 2611/243403/324911/8 1418 24 3/4 31651/4 1/221 30222251/84100BUNGLEDEALS1/6 3/828 283PLYBIRCH 48 1/1645676 481/4 3/434 44233253/1641173/163/1625 34 3/324,,,,,,i,201/63386851/6412520 1/3212425 1/8 480 106 665/1651621 2633495 3/84207201/16438 102014 1431 45 3/16493 122 753/8 3/827 37346881/24282203/323366414 3/81/1612435 1/4 4110 134 843/8 1/232 46153/3243803/6 3/845 63 2450 3/6 4165 2253/6 3/442 55TAPEREDSHEETS 38151/83387153/8 1/255 70 1/2 4225 2613/81521/4265TRAJLINO EDGE 38101/843867512 1/280 88 BATCHED SHEETS1/2 1/2531/43851/4132153/1633655012 3/468 88 36 5PLYBIRCN 48 12 3/446 823/8268 5/1611/439103/164368103/3212570 3/3241081/21503/8398 3/811/246101/43366301/812565 1/841085/8 5/8481/23128 1/2270101/4438890 SPRUCETRIANOLES 36 3/1612585 3/1641203/4 3/467103/83368503/83/8451/412650 1/441315-3/84366251/21/261 51/2336540343477 LONE STAR EPOXYINSTANT CL UE51/2436855 9,L/1 8991, Thick28810-3/32448 845GROOVED LC MOUHTS BALSA nul LIIVL 5,,5981, Thi25651/8448485l2Iiwh@S Cmli 806 743-6394 10am ApmCentraIlime15,,5882,TS,k55053/16448585 LITEPLY483/83/4/1/8/40 38,,5962,jrh,55051/44486251/881503/83/4/5/32/40 LONE STAR IVIODELS1/8123081/23/4/3/16/45 1623 57th St Lubbock TX 79412Handling ChargeS3O0 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Mast, Cad persona/ checks,, COD 4-1/8% Ia Teao US crecy Mnin,mOde 01000 II SA53P h keep prop tight hub Almost time Itried start itwould kick loose same time thought should check valve tappet clearance engine Both tappets found too snug adjusted clearance found engine behaved much better during starting pins could always tum prop nut about five six degrees tighten after flight Evidently engine first indica tion valve tappet adjustment off encounter excess detonation starting own safety clearances should checked two other engines encountered loss power tappets out adjustment would surmise case 12 tappets get off coming compression sooner sup posed Hence detonation several other brands 2s use locally having problems have encountered Im using will probably buy another engine size darn sure going same brand last would absolutely recommend prop pins removed brand engine remove courting disaster am under impression prop pins left just matter time before engine gets good like idea gasoline However engine Ive telling about headed ignition $125 will cost go route long run going much cheaper less painful fooling around engine its present form think minimize danger tappets engine should checked three four runs Continued page 20 plate engine backfires will generally cause prop nut prop washer prop itself thrown off solution latter problem suggested Bill Hoffmeister November 1985 Safety column use prop nut locking insert Nylok equivalent brand followed controversy over whether such props should pinned During past month received letter Em Milenberg proprietor Ems R/G Shop Ft Dodge IA Em has number four-stroke engines likes However has 1 2-cu-in engine says has some rather unpleasant traits letter related following account articles suggested engines pins prop hub should have pins removed because could split prop So dutifully removed pins got engine Late last summer having trouble getting engine started fairly new thought would use starter have done occasions other engines response instantaneous spinner went flying prop came off hit upper part chest cut shirt undershirt put welt chest broke tip off prop Five six inches higher would have gotten neck So much using starter critter used engine several times last fall again spring another incident taxied out runway checking controls before taking off engine stopped Ni-Cd starter battery pocket restarted engine As getting up prop came flying off hit twice leg decided pins going back prop hub having terrible time trying 18 Model Aviation POSI CURE CYANQACRYLATE wr1 -urn - r u-i i 1ra dlii WUWJ m A &am SPECIAL INTRODUCTORY OFFER ListSaleSavings 1 ozFast Cure 3-5 Sec4955000 Off 2 ozFast Cure 3-5 Sec895$39656% Off 1 ozGap-Filling -t- 10-25 Sec$2495QO/ Off 2 ozGap-Filling 5 Sec895$3965600 Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion w thin 30 days full refundNo qusad SHELDONS HOBBY SHOP A kAe S nJose CA95 2 FOR ORDERS ONLY PLEASE 800 228-3237 251-0789 INFO 408 251-0787 Clt rn ord r Hour Mon-Wed Fri & Stt 930-530 F X1 ER\iCF thur 930-900 1200500 COD ADD $190 seems running OK means leave prop pins anyone 12 four-stroke engine has experienced similar problems Em wishes write about experiences would welcome letters desire response please enclose SASE Meanwhile controversy pinned props versus nonpinned props four-stroke engines remains Again am very receptive mail subjectespecially manufacturers im porters such engines Frequency flags Another letter received during last month draws attention what its author regards very serious safety problem Bob Cardone following say past month have seen least five people come flying field new radios specific manufacturer no frequency flags questioned people flags transmitters said radios didnt come Last week three people flags flying same time believe manufacturers policy will cause accidents due peoples having flags flying anyway think frequency flag should required part radio system happen agree Bob very least radio manufacturer/importer can ensure safe flying operations supply appropriate frequency flag other hand shoulders safe operations really rest manufacturer/importer ultimate owner/operator Since Im engineer rather lawyer really dont have answer question Perhaps responsibility vendor mail-order house hobby shop RC equipment supplyor point out need forfrequency-identification flags FCC does require frequency flags displayed transmitter antennas order operator conformance regula tions AMA rule page 127 current 1986-87 AMA rule book states Figure 1 describes frequencies flags authorized CB channels old PRS frequencies old Amateur frequencies rule book also states same page Figure 2 describes frequen cies flags new RC channels authorized use AMA-sanctioned competitions interpretation again engineer rather lawyer statements AMA rule book whoever supervising flight opera tions RC models responsible ensuring appropriate frequency-identification flags displayed individual modelers Id interested hear comments statement modelers lawyers Id also like know individual AMA member stands regard AMA insurance coverage flies RC model display ing appropriate frequency flag trans mitter antenna requirement RC flying activities just AMA-sanctioned events responsibility RC club supervises flying-field operations ensure fliers display correct frequency flags transmitter antennas Any mail received subject will discussed future Safety column Wing strut failures following letter William Page California modeler subject wing-strut-attachment failures received last month needs no explanation partContinued page 22 20 Model Aviation oFcIJ SKY D[VI[ 65 Ignition Approved 90 Day Warranty Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug alit iesidtnt add 6% sales tax ORDR DIRICT T&D RESEARCH AssoclAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 SI FOR BROCHURE TaylorCraft Full span 108 Area 1670 Clipped 84 Area 1300 Power 75 12 Cu Beige 8 Ply 2 lbs $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu $9996 Super Kwik FIi Span 70 Area 927 Power 75 12 CU 10 $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 CU $9996 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7995 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2104644610 would like call attention some thing estimation serious safety violation sale use electricalequipment solder lugs wing-strut fittings RC models practice being followed two kit manufacturers solder lugs sup plied kits advertised ads club have two solder-lug failures have very fortunate cases since noticed before accident case two lugs failed -scale biplane occurred during first two flights actually saw wing moving flight have done electrical work know solder lugs made copper plated make easier solder might think appearance made steel As perhaps know copper work-hardens breaks readily dont know lugs bipe work-hardened flexing wing vibration either would have enough cause failure am certain anything made thin copper should used manner am also certain insurance underwriters would appalled knew being done Bills letter did identify names two manufacturers alleges supplying copper solder lugs wing-strut fittings Since have built kit models either manufac turer cannot comment adequacy strut fittings However intend send copies Bills letter identified manufacturers ask comments Safety equipment few days ago received sample new product being marketed Pelican Enterprises Inc Bloomingdale IL Ive mentioned company previously because supply variety products safetyrelated new product havent chance use yet called *202 After Flight Exhaust Cleaner comes 14-oz aerosol can intended remove exhaust goo collects glow-engine-powered models during flight Maybe some questioning product relates safety Let remind incident described ago Bill Winters Just Fun column Bill attempting hand-launch Old-Timer Sniffer model hand slipped gooey fuselage fed fingers through prop After incident Bill added high-friction panels either side fuselage ald grip launching model Pelicans #202 might another solution problem Have safe month John Preston c/o AMA 1810 Samuel Morse Dr Reston VA 22090 22 Model Aviation ROUSH KITS * SCALE DOCUMENTATION* SCALE DRAWINGS MODEL PLANS HPLA-1EcH AIRPLANE CATALOG~ INTERNATIONAL OVER 108 PAtIOS48500 MC KENZIE HWY S3OOVIDA OREGON 97488 PAW DIESELS Englands Finest 049 35 RIC STD Send $100 list Eric Cluttoel 913 Cedar Lane Tullahoma Tenn 37388
Edition: Model Aviation - 1986/11
Page Numbers: 16, 18, 20, 22
John Preston___________________________ Safety Comes First about warning labels pinned props fourstroke engines RC frequency flag problem WARNING LABELS April 1986 issue magazine reprinted letter David Lewis suggested RC equipment should carry warning label pictorially other wise would identify whether its frequency assigned aircraft models surface boat/car models David felt such labels would minimize sales radios frequencies illegal intended use forwarded Davids suggestion chair man AMA Safety Committee Jim McNeill enclosed letter stated felt suggestion should pursued pleased see Johnny Clemens District VIII VP report August 1986 issue such labels will soon appear RC equipment identifying its legal use recently received letter reader subject warning labels may interest some readers writer shall remain nameless believed recent FAA proposal owners certain Cessna aircraft some what absurd FAA proposal would require among other things posting warning label planes instrument panel advisingthe pilot sure seat latched properly before taxiing taking off landing Perhaps such label absurd response readers letter pointed out possible reason FAA proposal said may have originated proposal Cessna presumably aware inci dents pilots seats latched properly prior taxi takeoff landing Failure warn against potential hazard has apparently grounds number successful product liability suits against manu facturers incorrect use product its owner does let manufacturer off hook Example safety label laid out format suugested American National Stan dard soon published Theres quite bit about column should injury-producing accident occur Again failure manufacturer wam user about consequences incorrect use may grounds lawsuit regular job Federal regulatory agency No FAA have recently involved development waming labels several products According labeling ex perts isnt sufficient rely mere statement says Dont Dont consequences obeying message label should also present Very shortly American National Stan dards Institute will publishing voluntary standard ANSI z5354 Product Signs Labels Safety labels developed accordance provisions standard must contain following elements 1 Signal Word Typical words Danger Warning Caution selection appropriate word depends seriousness hazard label identifying Signal words should colored background red Danger orange Warning yellow Caution 2 Hazard Alert SymboL symbol internationally-recognized exclamation mark ing Look Out placed within triangular border located immediately front signal word 3 Pictorial Some hazards can illustrated pictorially Typical among fire electro cution radiation hazards However modeling hazards may difficult identify pictorial symbol Such symbol optional 4 IdentUlcation Hazard verbal message concisely identifies haz ard first verbal message afterthe signal word 5 Result Ignoring Warning tells reader what might happen warning ignored typical example message related modeling product might lacera tions hand fingers caused contact rotating prop 6 Avoiding Hazard last part label tells reader avoid hazard Elsewhere months column warning label follows provisions set forth draft ANSI labeling standard might value prop manufacturers Im suggesting label should used boxes props because think fingers-in-the-prop haz ard pretty obvious Im saying label could used Pinned props February 1985 Safety column strongly recommended owners four-stroke engines equipped propeller drive pins prop drive washer should remove pins time received number reports blades shattering pinned drive plate four-stroke engine usually 60-size backfired Unfortu nately such prop pinned drive Continued page 18 16 Model Aviation CAUTION ROTATING PROPELLERS CAN CAUSE SERIOUS LACERATIONS TO HAND OR FINGERS ENGINE MIXTURE ADJUSTMENTS SHOULD BE PERFORMED FROM BEHIND THE PROPELLER ARC 1 MAYBE THESE WARNIN6- LAEL$ SHOULD 1-JAVE HAD WARNING LABELS Ua AA WE ARE SHOOTING DOWNjJ* CUSTOM CUT CONTEST BALSA HIGH BALSA PRICES*All Sheets Piece ed Close Tolerances WITH SUPER QUALITY A Grade Dried ped 100% Satisfaction Guaranteed rious modeler want performance Direct Only must try 4-6 lb balsa BALSA SHEETS N ALSASTICKS 3648LIGHT4-6 LBBASSWOOD 48PINESTICKS N 48 HARD MAPLE 18 1/162331/16, 1/4093/163/1626181/813171/4 3/840 3/322 40 1/16 3/8 10 BALSA TRIANGLES36 WOOD363/16 1/43018141623 I3/83/848 1/6 2431/16 1/2141/41/4281/333483/163/8381/83828 27 3/81/250 3/162493/32 1/4103/83/8381/283483/181/2483/163/16II 243/83/408 1/4 2563/32 3/8121/21/2381/163493/163/4603163823 321/23/468 1/323373/32 1/2163/43/4463/323561/4 1/4423/161238 40 1/283371/8 1/8081 1551/83871/43/8491/41428 37 1/1633749311/8 1/411163/163761/43/48014383o42BIRCH DO WELS36 3/3234458 371/8 3/812 18BALSA PLANKS36 1/43883/83/8601/41234 47109 1/8 35471451/8 1/218 2411853/831153/81/278383837 523/1611 3/1636282 553/163/1611 16121501/231383/83/4901414 1/4 37395 613/16 3/817132003/432201/21/2905/1625 5/163653/16 1/22238142801 33001/23/4 150 SPRUCESTPCKS3848 3/832 3/8 388 124 711/4 1/416 2411/232751/1647818 1/615 1/2 3110 1551/4 3/819 2611/243403/324911/8 1418 24 3/4 31651/4 1/221 30222251/84100BUNGLEDEALS1/6 3/828 283PLYBIRCH 48 1/1645676 481/4 3/434 44233253/1641173/163/1625 34 3/324,,,,,,i,201/63386851/6412520 1/3212425 1/8 480 106 665/1651621 2633495 3/84207201/16438 102014 1431 45 3/16493 122 753/8 3/827 37346881/24282203/323366414 3/81/1612435 1/4 4110 134 843/8 1/232 46153/3243803/6 3/845 63 2450 3/6 4165 2253/6 3/442 55TAPEREDSHEETS 38151/83387153/8 1/255 70 1/2 4225 2613/81521/4265TRAJLINO EDGE 38101/843867512 1/280 88 BATCHED SHEETS1/2 1/2531/43851/4132153/1633655012 3/468 88 36 5PLYBIRCN 48 12 3/446 823/8268 5/1611/439103/164368103/3212570 3/3241081/21503/8398 3/811/246101/43366301/812565 1/841085/8 5/8481/23128 1/2270101/4438890 SPRUCETRIANOLES 36 3/1612585 3/1641203/4 3/467103/83368503/83/8451/412650 1/441315-3/84366251/21/261 51/2336540343477 LONE STAR EPOXYINSTANT CL UE51/2436855 9,L/1 8991, Thick28810-3/32448 845GROOVED LC MOUHTS BALSA nul LIIVL 5,,5981, Thi25651/8448485l2Iiwh@S Cmli 806 743-6394 10am ApmCentraIlime15,,5882,TS,k55053/16448585 LITEPLY483/83/4/1/8/40 38,,5962,jrh,55051/44486251/881503/83/4/5/32/40 LONE STAR IVIODELS1/8123081/23/4/3/16/45 1623 57th St Lubbock TX 79412Handling ChargeS3O0 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Mast, Cad persona/ checks,, COD 4-1/8% Ia Teao US crecy Mnin,mOde 01000 II SA53P h keep prop tight hub Almost time Itried start itwould kick loose same time thought should check valve tappet clearance engine Both tappets found too snug adjusted clearance found engine behaved much better during starting pins could always tum prop nut about five six degrees tighten after flight Evidently engine first indica tion valve tappet adjustment off encounter excess detonation starting own safety clearances should checked two other engines encountered loss power tappets out adjustment would surmise case 12 tappets get off coming compression sooner sup posed Hence detonation several other brands 2s use locally having problems have encountered Im using will probably buy another engine size darn sure going same brand last would absolutely recommend prop pins removed brand engine remove courting disaster am under impression prop pins left just matter time before engine gets good like idea gasoline However engine Ive telling about headed ignition $125 will cost go route long run going much cheaper less painful fooling around engine its present form think minimize danger tappets engine should checked three four runs Continued page 20 plate engine backfires will generally cause prop nut prop washer prop itself thrown off solution latter problem suggested Bill Hoffmeister November 1985 Safety column use prop nut locking insert Nylok equivalent brand followed controversy over whether such props should pinned During past month received letter Em Milenberg proprietor Ems R/G Shop Ft Dodge IA Em has number four-stroke engines likes However has 1 2-cu-in engine says has some rather unpleasant traits letter related following account articles suggested engines pins prop hub should have pins removed because could split prop So dutifully removed pins got engine Late last summer having trouble getting engine started fairly new thought would use starter have done occasions other engines response instantaneous spinner went flying prop came off hit upper part chest cut shirt undershirt put welt chest broke tip off prop Five six inches higher would have gotten neck So much using starter critter used engine several times last fall again spring another incident taxied out runway checking controls before taking off engine stopped Ni-Cd starter battery pocket restarted engine As getting up prop came flying off hit twice leg decided pins going back prop hub having terrible time trying 18 Model Aviation POSI CURE CYANQACRYLATE wr1 -urn - r u-i i 1ra dlii WUWJ m A &am SPECIAL INTRODUCTORY OFFER ListSaleSavings 1 ozFast Cure 3-5 Sec4955000 Off 2 ozFast Cure 3-5 Sec895$39656% Off 1 ozGap-Filling -t- 10-25 Sec$2495QO/ Off 2 ozGap-Filling 5 Sec895$3965600 Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion w thin 30 days full refundNo qusad SHELDONS HOBBY SHOP A kAe S nJose CA95 2 FOR ORDERS ONLY PLEASE 800 228-3237 251-0789 INFO 408 251-0787 Clt rn ord r Hour Mon-Wed Fri & Stt 930-530 F X1 ER\iCF thur 930-900 1200500 COD ADD $190 seems running OK means leave prop pins anyone 12 four-stroke engine has experienced similar problems Em wishes write about experiences would welcome letters desire response please enclose SASE Meanwhile controversy pinned props versus nonpinned props four-stroke engines remains Again am very receptive mail subjectespecially manufacturers im porters such engines Frequency flags Another letter received during last month draws attention what its author regards very serious safety problem Bob Cardone following say past month have seen least five people come flying field new radios specific manufacturer no frequency flags questioned people flags transmitters said radios didnt come Last week three people flags flying same time believe manufacturers policy will cause accidents due peoples having flags flying anyway think frequency flag should required part radio system happen agree Bob very least radio manufacturer/importer can ensure safe flying operations supply appropriate frequency flag other hand shoulders safe operations really rest manufacturer/importer ultimate owner/operator Since Im engineer rather lawyer really dont have answer question Perhaps responsibility vendor mail-order house hobby shop RC equipment supplyor point out need forfrequency-identification flags FCC does require frequency flags displayed transmitter antennas order operator conformance regula tions AMA rule page 127 current 1986-87 AMA rule book states Figure 1 describes frequencies flags authorized CB channels old PRS frequencies old Amateur frequencies rule book also states same page Figure 2 describes frequen cies flags new RC channels authorized use AMA-sanctioned competitions interpretation again engineer rather lawyer statements AMA rule book whoever supervising flight opera tions RC models responsible ensuring appropriate frequency-identification flags displayed individual modelers Id interested hear comments statement modelers lawyers Id also like know individual AMA member stands regard AMA insurance coverage flies RC model display ing appropriate frequency flag trans mitter antenna requirement RC flying activities just AMA-sanctioned events responsibility RC club supervises flying-field operations ensure fliers display correct frequency flags transmitter antennas Any mail received subject will discussed future Safety column Wing strut failures following letter William Page California modeler subject wing-strut-attachment failures received last month needs no explanation partContinued page 22 20 Model Aviation oFcIJ SKY D[VI[ 65 Ignition Approved 90 Day Warranty Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug alit iesidtnt add 6% sales tax ORDR DIRICT T&D RESEARCH AssoclAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 SI FOR BROCHURE TaylorCraft Full span 108 Area 1670 Clipped 84 Area 1300 Power 75 12 Cu Beige 8 Ply 2 lbs $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu $9996 Super Kwik FIi Span 70 Area 927 Power 75 12 CU 10 $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 CU $9996 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7995 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2104644610 would like call attention some thing estimation serious safety violation sale use electricalequipment solder lugs wing-strut fittings RC models practice being followed two kit manufacturers solder lugs sup plied kits advertised ads club have two solder-lug failures have very fortunate cases since noticed before accident case two lugs failed -scale biplane occurred during first two flights actually saw wing moving flight have done electrical work know solder lugs made copper plated make easier solder might think appearance made steel As perhaps know copper work-hardens breaks readily dont know lugs bipe work-hardened flexing wing vibration either would have enough cause failure am certain anything made thin copper should used manner am also certain insurance underwriters would appalled knew being done Bills letter did identify names two manufacturers alleges supplying copper solder lugs wing-strut fittings Since have built kit models either manufac turer cannot comment adequacy strut fittings However intend send copies Bills letter identified manufacturers ask comments Safety equipment few days ago received sample new product being marketed Pelican Enterprises Inc Bloomingdale IL Ive mentioned company previously because supply variety products safetyrelated new product havent chance use yet called *202 After Flight Exhaust Cleaner comes 14-oz aerosol can intended remove exhaust goo collects glow-engine-powered models during flight Maybe some questioning product relates safety Let remind incident described ago Bill Winters Just Fun column Bill attempting hand-launch Old-Timer Sniffer model hand slipped gooey fuselage fed fingers through prop After incident Bill added high-friction panels either side fuselage ald grip launching model Pelicans #202 might another solution problem Have safe month John Preston c/o AMA 1810 Samuel Morse Dr Reston VA 22090 22 Model Aviation ROUSH KITS * SCALE DOCUMENTATION* SCALE DRAWINGS MODEL PLANS HPLA-1EcH AIRPLANE CATALOG~ INTERNATIONAL OVER 108 PAtIOS48500 MC KENZIE HWY S3OOVIDA OREGON 97488 PAW DIESELS Englands Finest 049 35 RIC STD Send $100 list Eric Cluttoel 913 Cedar Lane Tullahoma Tenn 37388