___John Preston___________________________ Safety Comes First ENGINES Starting techniques injury asso ciated sport model airplanes frequently reported laceration caused contact rotating propeller Judging mail seems likely time mod elers will contact turning prop during en gine starting/tuning operation models engine equipped throttle case installations Free Flight Control Line models have no alternative flip prop expect engine scream full bore minute fires However greatest number AMA members fly radio-controlled models en gines models equipped throt tle So full-throttle starts can beand opinion should beavoided Therefore some surprise read some engine-starting instructions sent Peter Jacobitz modeler East Boston MA instructions contained fol lowing note carbureted engines throt tle valve should wide open during engine starting letter Peter asked correct invitation disaster give en gines manufacturer fair due instructions did also state Make sure holding airplane firmly prevent suddenly lurch ing forward engine starts other words followed engine-starting directions disaster should averted However curious learn whether particular engine required wide-open throt tie order start easily wrote man ufacturer response received another instruction sheet particular engine manufacturer proposed changes starting instructions will read follows 1 booster battery disconnected turn needle valve counterclockwise two turns fully closed position 2 throttle wide open place fin gertip over carburetor inlet flip propel ler quickly two times prime engine 3 Remove fingertip carburetor inlet close throttle fast idle setting flip propeller quickly two three times booster battery still disconnected NOTE Make sure holding airplane firmly prevent lurching forward engine starts After starts maintain hold until have reduced throttle lowidle setting 4 Connect booster battery clip glow plug 5 Slowly turn propeller counterclock wise feel momentary resistance indicates ignltion mixture cyl inder 6 Quickly flip propeller start en gine disconnect booster battery much prefer starting instructions both Wanted Reliable bud dies buddy system Sailplane towlines deserve re spect Safe enginestarting procedures safety experience ease start ing case Im boring experienced modelers let throw anecdote true story incident occurred few years ago nearby airport pilot full-scale aircraft flipped prop engines throttle wide open aircraft DeHavilland Tiger Moth flies barnstorming-type air show Sunday during summer airfield Vir ginla Its owner experiencing engine starting problems several weeks would frequently become flooded during operation solution flooding problem ro tate propeller through several revolutions hand Tiger Moth has no starter e b throttle wide open day inci dent owner friend arrived late air field airplane hangared luck would have engine didnt want start became flooded owners friend front cockpit instructed open throttle Im sure whether also told turn off magneto ignition switches Anyway owner pulled prop through compression engine burst life aircraft proceeded accelerate down taxiway between two rows hangars Editors note Unless liger Moth modified no wheel brakesthe plane relies drag tail skid slow down under normal circumstances RMcM told own ers friend airline pilot either familiar Tiger Moths just plain reacted too late result aircraft became airborne hit dirt embankment end taxiway However flight short-lived because struck some telephone wires other side embankment ended up its nose field Fortunately no body injuredjust plane story about heard after inci dent happened because British Continued page 16 /I 7 II AND ThEN TI-IE PROP FLEW OFF OF TWE 4STROKE AND WOULD vtU 6ELIEVE mAr 0L LIG44TNIN& LARRY HERE ACTUALLY CAU14T THE SUCKER 14 Model Aviation column provided address items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily represent official position Academy Model Aeronautics ATTENTION AMA MEMBERS THE ALL NEW 11th EDITION Radio Control Buyers Guide IS HOT OFF THE PRESS Hobbyistts Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1 495 $1195 i $300 postage/handling RADIO CONTROL BUYERS GUIDE Clifton House ton VA 22024 may use VISA MasterCard citarpe payment sending card number expiration date order DGA Designs OS DGA. DCA Designs 0 0 0 It1 o5 S 0 SPORT BIPE QUARTER SCALE PLANS QuarterMaster Sport Ripe $21 Quadra 35.73Spafl.E-Z build. Great Flyer.SSe,,tutAcailacle.. DAViS 0-1K 905Spar. 0 Quadra 35 power similar. PPO 1933 KINNER SPORTSTER Model K.llrSpan 035 power FF0 s25 4-CYCLE PROJECTS t ts&E AKRON FUNK VS Scale SC span 60 Size 4 cycle. Fantastic Flyppo s21 ________0 S DlK603 Span.I C 45 4 cycle similar. caD S.j Two Inch scale Sixth scale $1933 KINNER SPORTSTER** 4 Model K. 78 Span. lt1-75.4cyPco5lO C** Photo -educed t-On 14 Scale plane. OTwo scat SlatS seal ________0 tdce OS PlanS coming Scale Piano t PHOTO DOCUMENTATION PACKS aoai table- 0 ALL PLANS ROLLEDSHIPPED UPS Complete wlnstructe, Booklet Send 5100 Catalog New York State SesOentS add 7% sales tax. Send check MO s. Allow 3 weeks tOr check clear S plane throttie works opposite direction conventional US planes just because assisted Tiger Moths owner starting another occasion prior accident What reversed British aircraft such Tiger Moth action engines magneto switches Up Off down Fur thermore mag switches Tiger Moth instrument panel US lightplanes mounted exterior fu selage left ofand betweenthe cockpits Its guess owners friend either familiar up-Off/down-On convention txtag switches didnt know located end story happier note Tiger repairable its owner still flying Sunday air shows overhauled engine now starts easily Before leaving subject engine-starting juries Id like repeat suggestion previ ously made April 1987 column reminded article Buddy Box newsletter Cloud Busters club California Under title Safety Notes editor Jacklast name known reported cident club member got arm arc 18-in prop being turned Big Banger Apparently no holding plane time incident because throt tle half-open plane started move engine came life Its owner instinctively moved hand stop model sustained arm lacerations required 100 stitches se cure As possible way avert such incidents future editor Buddy Box suggested Continued page 18 INTRODUCING NEW COLD WEATHER FRIEND YOU CAN COUNT ON TRANZMITTEN 0 Simple yet very effective 0 Keeps out wind cold o Will restrict hand motions 0 Made USA AMA modeler Fits Tx-Sturdy construct opolyoster filled nylon quilting oCotton jersey lining lD label 0Velcro closuresfastsure fit 0Choose RedBlue Brt Orange AMA patch included yourswell sewone free NO POSTAL HANDLING FEE send patchcolor choice SKYHI ENTERPRISE 422E 20th AVE COLUMBUS OHIO 43201 SATISFACTION GUARANTEED 16 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30I 1/16233 3/32240 1/8 243 3/16249 1/4 258 1/32337 1/20337 1/163374931 3/32 3445837 1/8 3547145 3/163828255 1/4 3739561 5/16385 3/8 3 88 124 71 1/2 3 110 155 3/4 3 165 1/1845876 48 3/3247084 56 1/9 4 85 106 66 3/164 93 122 75 1/4 4110 13484 3/6 4 165 225 1/2 4 225 261 MATCHED SHEETS 42 3/324100 1/84108 3/164120 1/44131 BALSA STICKS 3S4 1/16 1/409 1/16 3/610 1/16 1/214 3/32 1/410 3/32 3/912 3/32 1/216 1/8 1/606 1/9 1/411 1/8 3/812 1/8 1/216 3/163/1011 3/16 3/617 3/16 1/222 14 1/416 1/4 3/819 1/4 1/221 1/4 3/434 1/4 140 5/165/1621 3/8 3/827 3/6 1/232 3/8 3/442 36 152 1/2 1/236 12 3/446 1/2 150 5/6 5/646 3/4 3/467 BALSA HOT LINE Call 806 7456394 10 ant -6pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 3I iwj~rwLIGHT4-6 LB BALSA TRIANGLES 36WOOD36 4 4251/32349 36 38301/20349 2 2391/16349 34 34453/32358 551/8367 63/16376 8BALSA PLANKS361/4395 24853/83115 62501/23139 32003/43220 301429613300 2411/232751/16479 2611/243603/32491 30222251/84100 44233253/164117 244351/44138 28334953/94207 37346881/24292 46 65TAPERED SHEETS36 1/4265TRAILING EDGE36 531/43951/4132 623/82685/1611/439 3/83963/81 1/246 1/231201/2270 LONE STAR EPOXY 0 oz111845 5,,588 1511/IT588 30 nli598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa BASSWOOD 3/16 3/16 3/181/4 3/163/8 3/16 1/2 3/163/4 1/4 1/4 1/4 3/8 1/43/4 3/83/8 3/6 1/2 3/8 3/4 1/2 1/2 1/2 3/4 4 26 39 39 46 50 42 49 88 80 70 90 90 100 BUNDLEDEALS 201/6338695 201/164361020 203/32336841 153/32439955 151/8336715 101/8439675 153/16338900 103/18436810 101/4339630 101/4439890 103/8336650 5-3/8436629 51/2334540 INSTANT CLUE 51/2436855 1 o TS6 296 103/32448845 1 sThi 299 51/8446495 2eTSAk 550 53/16448985 2, rs 550 51/4446625 2 PINE STICKS 36 4 1/81/81317 1/61/41623 1/83/82027 3183/161724 3/16 3/92332 3/161/23040 1/4142637 1/43/93042 1/41/23447 3/6 3/83752 SPRUCESTICKS 36 4 1/8 1/815 1/8 1/41824 1/8 3/82039 3/163/162534 1/4 1/43145 1/4 3/83650 3/9 3/84583 3/8 1/25570 1/2 1/28086 12 3/48888 SPRUCE TRiANGLES 3/83/8 1/2 1/2 3/4 3/4 34651 11 77 HARD MAPLE 1/4 3/6 3/8 3/9 3/8 1/2 3/9 3/4 1/23/4 BIRCH DOWELS 1/8 3/16 1/4 5/16 3/8 18 40 45 50 58 58 36 00 11 14 25 32 3PLYBIRCN4 1/6412525 1/3212425 1/1812435 1/812450 SPLYBIRCH4 3/3212570 1/812585 3/1812595 1/412600 GROOVED LG. MOUNTS 82 lecheR LaTE PLY43/83/411/8/40 1/861503/83/4/5/32/40 1/8123881/23/4/3/18/45 Handling ChargeS300 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Master Card personal checks COD 4-118% ta Teas US currency Mnmam Order $1000 PILOT GLASSES Safety Products Modelers Modelers Sunglasses ANSI Z871 approved safety glasses Rts over prescription glasses Extremely light weight additional comfort Free-flow ventilation system temples Wrap around side protection Anti-fog Anti-ultraviolet radiation Available clear gray mirror case included Clear $1095Gray $1195 Mirror $1495 CYA Mask 5 1BC Halon Fire Extinguisher $1495 Shipping handling add $275 Visa Mastercard accepted NO CODs Send cashiers check money order Safety Plus _________PO Box 1173 FLU5924-9640 cmlton MS members try use airplane-restraining device much possible included cop ies photographs three such devices featured April 1987 Safety col umn Yes means item lug out flying field some designs also serve re straining devices prevent model taxi ing around back van station wagon during journey suggest consider such device dont already have Hi-start hazard isnt propellers can cause injuries modelers hands letter Joshua Fiero East Lyme CT points out hi-startprobably commonly used Sailplane launching devicecan also bite un wary Editors note unfamiliar hi-start launching device consists con siderable lengthperhaps 100 ft thickwalled rubber surgical tubing attached end stake driven ground other end lengthperhaps 400 ft monofilament braided nylon line free end line attached towhook Sailplane flier pulls plane back consid erable distance stretch rubber tube re leases noodel flight force rubber tube returning its unstretched length im parts sufficient force tow model aloft after end towline falls free towhook RMcM Joshua described incident follows Several weeks ago Gentle Lady Sailplane using hi-start-type launch device being pre pared flight pilots assistant too fansil iar RC flying assisting operation helping bring tension nylon launch line Continued page 20 00 E~ri wM 64 503 2 75 25ygtCe0201/419132714542613001/006 3005 CaLina PsySa12397842 19C,L1s 004 N625990-9* 17F55, 07 FEc1492110 310ay1a G,se117178351807 2 7032 13SapernaE1eo 165157228441660 24 8035 36 0a1fhAk1472102316 ICALP161 35t,/ EE,La #11271841208240Lck 6155 430,e AvengBe 3sF301440169032F,d JAl465 425, 0170 Ft. 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* PRICES FOR ALL DESIGNS 1* AGO AND INSUEANCE.A800T IHOISAND ADDITIONAL PLANS MANY 5/165S Ia 13650 375 CATALOG $200 09 PRICE LIST ALONE 9/ FREE lE FOREIGN bC CAN & MEO/ 03___g /2/6/ 6El~O Model 8 DETROIT AVSNaE CLEVEtAWO OHIO 44102 18 Model Aviation 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 DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm and 930 pm EST Mon & Wed DAVIS DiESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 pilot backing up almost ready hand-launch assistant fore warned about possibility taken un awares holding tension nylon line bare hand nylon line broke para chute attachment point near plane assistant sustained hand injuries consist ing burn-cut groove across three four fingers Amazingly no bleeding drop blood being medic would guess fast-moving nylon line auto matically cauterized cut due extremely high temperature generated its friction cut through tissues lack bleeding cut estimated up %-in deep probably blessing Think simple cut nice newX-Acto other hobby knife blade bleeds slips finger can recall incident experienced number years ago could have simi lar results time Graupner Cirrus Sailplane frequently launched histart occasion pulling nylon line back launch site local recreational area sawn-off VW appeared field some off-road cavorting Despite shouted warnings its driver went straight nylon line hi-start needless say dropped like hot potato seen VW approaching too might have fingers cau terized severed Whether use histart winch launch Sailplane treat line extreme caution respect Four-stroke backfire solution recent letter Duke Iden described yet another incident prop thrown four-stroke engine resulted trip hospital Dukes letter Continued page 22 1/6 scale fully poseable 12 action pilots dressed in-removable fabric flight gear time No painting assembly required WWI & Civilian weigh 6 oz WWII pilot has removable Parachute Mae West weighs 8 oz Add $325 per figure P&H Calif res add sales tax Allow 10 days delivery Note Pilots can also fly 1/5 scale ships Send Check money order MGA Enterprises PO Box 626 Dept Fresno Calif 93709 20 Model Aviation F mga pilots 1 N1ORE POWEii WITH LESS NOISE four-cycle measuring up expectations read IAVEY YSTEMS Performance Quiet Clean Electric Power THE HERONBILL WINTERS SENSATIONAL HERON NEW SPORT/COMPETITION DESIGN FOR 05/ 075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE COMBINES NEW SPECIAL AIRFOIL AND LIFTING STABILATOR FOR GREAT PER FORMANCE 65 SPAN 545 SQ AREA AND 440Z LUCIFERAIWO METER EASY TO BUILD AND FLY SAILPLANE FOR THE NOVICE OR COMPETITOR USING THE POPULAR PROPHET SERIES MODIFIED E-193 AIRFOIL DESIGNED FOR 05/075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE CAN ALSO BE FLOWN WITH 15 COBALT MOTORS OR 049 ENGINES 78 SPAN 600 SQ AREA AND 40 OZ ALL DAVEY SYSTEMS ELECTRIC KITS ARE NOW AVAILABLE WITH THE NEW 075 HYPERTHRUST MOTOR AND SWITCH HARNESS ON THE MOTOR SWITCH HARNESS AND GEAR REDUCER MOTOR/HARNESS MOTOR/HARNESS/GEARS follows also describes solution _________________________________________ problem Talk about timing Ive just returned hospital after getting seven stitches right index fingerthe use start engines As lying bed wonderful wife brought September issue Model Avia tion started article headline jumped right out uddy system could save life Four-stroke engines still throw props Boy Talk about timely journalism Heres story started five weeks Id rebuilding scratch-built -scale Tay loreraft Sid Morgan plans plane got new radio 48-size four-cycle engine inverted installation using 15%-nitro fuel 12-6 prop did use electric starter start several timesbut made certain really tighten nut hand-starting engine half-throttle setting per instructions Suddenly engine fired prop flew off towards inflicted deep cut finger hit lip Im glad wasnt . Meanwhile finger bleeding like sieve Now wonderful wife buddy sys tem clubs field like others real close help injuries serious nature could present problem solo flier Earlier morning loading van Sue asked would like go has always very understanding backs hobby lucky am said Sure several minutes ready go T-Crafts maiden flight bit ner vous As can see darned good thing wife came because time Continued page 133 22 Model Aviation TRIM KNIFE * -M vrnI RAVEY675 TOWER LANE YSTEMSWEST CHESTER PA 19380 oRPORATION Trim Knife designed precisely edge trim excess cover ing material model Can used outside edges straight curved Blade can set ftom 1/16 1/4 mith simple adjustmest screm Trim Knife mill make perfect overlap butt seams Works cover rg materials 6 blades Trim Knife Set includes B blades Trim Knife Blades 5 per pack 1987 NATIONAL CHAMPION Tony Frackowiak shown winning FAI RC Pattern 1987 NATS original design LENGE IV CHALLENGE IV available basic kit featuring epoxyglass fuselage foam wings stab $14995 Deluxe Kit $35000 much assem bly complete exceptionally smooth pre cise flying aircraft equally adept AMA FAI pattern Much individual preference can accomodated including choice Tn-Gear Tail Dragger 790 sq wing 820 sq depending desired flight speed C\Soe\C $8je ~ ietractS9 GO& par1terSs a0d atpiP~3 ~oyS oriented public relations better way us go Martin Dilly West Wickham Kent England can t think anyone wouldn t like see high respect airplane mod eling general public unfortunate ly doesnt seem magic answers assure giant leap di rection Safety/Preston Continued page 22 accident no else field Just two minutes before accident two other members left leaving just two us accident happened grabbed torn finger Sue helped load van drove nearby fire station para medic gave preliminary check said going live bound up wound off went hospital After receiving seven stitches finger several days later returned field T-Craft did again time prop flew off hit leg no hospital trip time made deep cut After lengthy dis cussion club president engine expert Frank Warren electronics expert Ron Roeder bought zero-to-five-ohm wirewound rheostat could handle 25 amps found local surplus outlet $150 also picked up toggle switch 50 cents lit tle fellows went power panel field box Since Ive no problems Frank Ron contended glow plug getting too much juice causing detonation problem loosening prop nut causing insurance company shudder would recommend addition anyone firing up four-stroke toggle switch works kill-switch glow plug can cut heat quickly havent personally tried out Dukes sugges tion However worked him may work others Meanwhile wonder engine manufacturers going provide some means positively retain prop nut shaft column has discussed several methods have suggested readers its ex actly new technology wrap up months column letter Joe Wagner New Wilmington PA points out buddy system infallible Ill let Joe tell tale Im responding latest column Sep tember 87 mentioning buddy tystem good bit model flying alone although Ive never problems agree its better have buddy along However make sure youve got dependable An experience back 1942 case point building solid Scale models friend basement big knife using roughly shape Short Stirling fuse lage slipped made huge gash hand Blood everywhere before could pick up rag slow flow turned buddy help saw him collapsed heap floor learned later despite Boy Scout training merit badges First Aid friend people simply can stand sight blood did know Bleeding hand managed carry friend upstairs alone house lay him down couch make sure breathing OK before left made way doctors office circumstances Id have better off alone now wonder about some peo ple occasionally fly would react case bloody accident Maybe ought ask themtactfully course Have another safe month John Preston 2812 Northampton St N W Washington DC 20015 TR-260/Shepherd Continued page 34 Select some grain 3/ sheet tur fledeck sides cut little oversize Wet outside sheet will curve over formers stringers easily use CyA glue attach Sand top sheets flush formers top stringers glue -in light sheet top Cut excess off sides A-in sheet sand top long straight block Glue landing gear plate place epoxy Glue bottom A-in sheet place December 1987 133 U Letters Editor Continued page 12
Edition: Model Aviation - 1987/12
Page Numbers: 14, 16, 18, 20, 22, 133
___John Preston___________________________ Safety Comes First ENGINES Starting techniques injury asso ciated sport model airplanes frequently reported laceration caused contact rotating propeller Judging mail seems likely time mod elers will contact turning prop during en gine starting/tuning operation models engine equipped throttle case installations Free Flight Control Line models have no alternative flip prop expect engine scream full bore minute fires However greatest number AMA members fly radio-controlled models en gines models equipped throt tle So full-throttle starts can beand opinion should beavoided Therefore some surprise read some engine-starting instructions sent Peter Jacobitz modeler East Boston MA instructions contained fol lowing note carbureted engines throt tle valve should wide open during engine starting letter Peter asked correct invitation disaster give en gines manufacturer fair due instructions did also state Make sure holding airplane firmly prevent suddenly lurch ing forward engine starts other words followed engine-starting directions disaster should averted However curious learn whether particular engine required wide-open throt tie order start easily wrote man ufacturer response received another instruction sheet particular engine manufacturer proposed changes starting instructions will read follows 1 booster battery disconnected turn needle valve counterclockwise two turns fully closed position 2 throttle wide open place fin gertip over carburetor inlet flip propel ler quickly two times prime engine 3 Remove fingertip carburetor inlet close throttle fast idle setting flip propeller quickly two three times booster battery still disconnected NOTE Make sure holding airplane firmly prevent lurching forward engine starts After starts maintain hold until have reduced throttle lowidle setting 4 Connect booster battery clip glow plug 5 Slowly turn propeller counterclock wise feel momentary resistance indicates ignltion mixture cyl inder 6 Quickly flip propeller start en gine disconnect booster battery much prefer starting instructions both Wanted Reliable bud dies buddy system Sailplane towlines deserve re spect Safe enginestarting procedures safety experience ease start ing case Im boring experienced modelers let throw anecdote true story incident occurred few years ago nearby airport pilot full-scale aircraft flipped prop engines throttle wide open aircraft DeHavilland Tiger Moth flies barnstorming-type air show Sunday during summer airfield Vir ginla Its owner experiencing engine starting problems several weeks would frequently become flooded during operation solution flooding problem ro tate propeller through several revolutions hand Tiger Moth has no starter e b throttle wide open day inci dent owner friend arrived late air field airplane hangared luck would have engine didnt want start became flooded owners friend front cockpit instructed open throttle Im sure whether also told turn off magneto ignition switches Anyway owner pulled prop through compression engine burst life aircraft proceeded accelerate down taxiway between two rows hangars Editors note Unless liger Moth modified no wheel brakesthe plane relies drag tail skid slow down under normal circumstances RMcM told own ers friend airline pilot either familiar Tiger Moths just plain reacted too late result aircraft became airborne hit dirt embankment end taxiway However flight short-lived because struck some telephone wires other side embankment ended up its nose field Fortunately no body injuredjust plane story about heard after inci dent happened because British Continued page 16 /I 7 II AND ThEN TI-IE PROP FLEW OFF OF TWE 4STROKE AND WOULD vtU 6ELIEVE mAr 0L LIG44TNIN& LARRY HERE ACTUALLY CAU14T THE SUCKER 14 Model Aviation column provided address items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily represent official position Academy Model Aeronautics ATTENTION AMA MEMBERS THE ALL NEW 11th EDITION Radio Control Buyers Guide IS HOT OFF THE PRESS Hobbyistts Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1 495 $1195 i $300 postage/handling RADIO CONTROL BUYERS GUIDE Clifton House ton VA 22024 may use VISA MasterCard citarpe payment sending card number expiration date order DGA Designs OS DGA. DCA Designs 0 0 0 It1 o5 S 0 SPORT BIPE QUARTER SCALE PLANS QuarterMaster Sport Ripe $21 Quadra 35.73Spafl.E-Z build. Great Flyer.SSe,,tutAcailacle.. DAViS 0-1K 905Spar. 0 Quadra 35 power similar. PPO 1933 KINNER SPORTSTER Model K.llrSpan 035 power FF0 s25 4-CYCLE PROJECTS t ts&E AKRON FUNK VS Scale SC span 60 Size 4 cycle. Fantastic Flyppo s21 ________0 S DlK603 Span.I C 45 4 cycle similar. caD S.j Two Inch scale Sixth scale $1933 KINNER SPORTSTER** 4 Model K. 78 Span. lt1-75.4cyPco5lO C** Photo -educed t-On 14 Scale plane. OTwo scat SlatS seal ________0 tdce OS PlanS coming Scale Piano t PHOTO DOCUMENTATION PACKS aoai table- 0 ALL PLANS ROLLEDSHIPPED UPS Complete wlnstructe, Booklet Send 5100 Catalog New York State SesOentS add 7% sales tax. Send check MO s. Allow 3 weeks tOr check clear S plane throttie works opposite direction conventional US planes just because assisted Tiger Moths owner starting another occasion prior accident What reversed British aircraft such Tiger Moth action engines magneto switches Up Off down Fur thermore mag switches Tiger Moth instrument panel US lightplanes mounted exterior fu selage left ofand betweenthe cockpits Its guess owners friend either familiar up-Off/down-On convention txtag switches didnt know located end story happier note Tiger repairable its owner still flying Sunday air shows overhauled engine now starts easily Before leaving subject engine-starting juries Id like repeat suggestion previ ously made April 1987 column reminded article Buddy Box newsletter Cloud Busters club California Under title Safety Notes editor Jacklast name known reported cident club member got arm arc 18-in prop being turned Big Banger Apparently no holding plane time incident because throt tle half-open plane started move engine came life Its owner instinctively moved hand stop model sustained arm lacerations required 100 stitches se cure As possible way avert such incidents future editor Buddy Box suggested Continued page 18 INTRODUCING NEW COLD WEATHER FRIEND YOU CAN COUNT ON TRANZMITTEN 0 Simple yet very effective 0 Keeps out wind cold o Will restrict hand motions 0 Made USA AMA modeler Fits Tx-Sturdy construct opolyoster filled nylon quilting oCotton jersey lining lD label 0Velcro closuresfastsure fit 0Choose RedBlue Brt Orange AMA patch included yourswell sewone free NO POSTAL HANDLING FEE send patchcolor choice SKYHI ENTERPRISE 422E 20th AVE COLUMBUS OHIO 43201 SATISFACTION GUARANTEED 16 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30I 1/16233 3/32240 1/8 243 3/16249 1/4 258 1/32337 1/20337 1/163374931 3/32 3445837 1/8 3547145 3/163828255 1/4 3739561 5/16385 3/8 3 88 124 71 1/2 3 110 155 3/4 3 165 1/1845876 48 3/3247084 56 1/9 4 85 106 66 3/164 93 122 75 1/4 4110 13484 3/6 4 165 225 1/2 4 225 261 MATCHED SHEETS 42 3/324100 1/84108 3/164120 1/44131 BALSA STICKS 3S4 1/16 1/409 1/16 3/610 1/16 1/214 3/32 1/410 3/32 3/912 3/32 1/216 1/8 1/606 1/9 1/411 1/8 3/812 1/8 1/216 3/163/1011 3/16 3/617 3/16 1/222 14 1/416 1/4 3/819 1/4 1/221 1/4 3/434 1/4 140 5/165/1621 3/8 3/827 3/6 1/232 3/8 3/442 36 152 1/2 1/236 12 3/446 1/2 150 5/6 5/646 3/4 3/467 BALSA HOT LINE Call 806 7456394 10 ant -6pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 3I iwj~rwLIGHT4-6 LB BALSA TRIANGLES 36WOOD36 4 4251/32349 36 38301/20349 2 2391/16349 34 34453/32358 551/8367 63/16376 8BALSA PLANKS361/4395 24853/83115 62501/23139 32003/43220 301429613300 2411/232751/16479 2611/243603/32491 30222251/84100 44233253/164117 244351/44138 28334953/94207 37346881/24292 46 65TAPERED SHEETS36 1/4265TRAILING EDGE36 531/43951/4132 623/82685/1611/439 3/83963/81 1/246 1/231201/2270 LONE STAR EPOXY 0 oz111845 5,,588 1511/IT588 30 nli598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa BASSWOOD 3/16 3/16 3/181/4 3/163/8 3/16 1/2 3/163/4 1/4 1/4 1/4 3/8 1/43/4 3/83/8 3/6 1/2 3/8 3/4 1/2 1/2 1/2 3/4 4 26 39 39 46 50 42 49 88 80 70 90 90 100 BUNDLEDEALS 201/6338695 201/164361020 203/32336841 153/32439955 151/8336715 101/8439675 153/16338900 103/18436810 101/4339630 101/4439890 103/8336650 5-3/8436629 51/2334540 INSTANT CLUE 51/2436855 1 o TS6 296 103/32448845 1 sThi 299 51/8446495 2eTSAk 550 53/16448985 2, rs 550 51/4446625 2 PINE STICKS 36 4 1/81/81317 1/61/41623 1/83/82027 3183/161724 3/16 3/92332 3/161/23040 1/4142637 1/43/93042 1/41/23447 3/6 3/83752 SPRUCESTICKS 36 4 1/8 1/815 1/8 1/41824 1/8 3/82039 3/163/162534 1/4 1/43145 1/4 3/83650 3/9 3/84583 3/8 1/25570 1/2 1/28086 12 3/48888 SPRUCE TRiANGLES 3/83/8 1/2 1/2 3/4 3/4 34651 11 77 HARD MAPLE 1/4 3/6 3/8 3/9 3/8 1/2 3/9 3/4 1/23/4 BIRCH DOWELS 1/8 3/16 1/4 5/16 3/8 18 40 45 50 58 58 36 00 11 14 25 32 3PLYBIRCN4 1/6412525 1/3212425 1/1812435 1/812450 SPLYBIRCH4 3/3212570 1/812585 3/1812595 1/412600 GROOVED LG. MOUNTS 82 lecheR LaTE PLY43/83/411/8/40 1/861503/83/4/5/32/40 1/8123881/23/4/3/18/45 Handling ChargeS300 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Master Card personal checks COD 4-118% ta Teas US currency Mnmam Order $1000 PILOT GLASSES Safety Products Modelers Modelers Sunglasses ANSI Z871 approved safety glasses Rts over prescription glasses Extremely light weight additional comfort Free-flow ventilation system temples Wrap around side protection Anti-fog Anti-ultraviolet radiation Available clear gray mirror case included Clear $1095Gray $1195 Mirror $1495 CYA Mask 5 1BC Halon Fire Extinguisher $1495 Shipping handling add $275 Visa Mastercard accepted NO CODs Send cashiers check money order Safety Plus _________PO Box 1173 FLU5924-9640 cmlton MS members try use airplane-restraining device much possible included cop ies photographs three such devices featured April 1987 Safety col umn Yes means item lug out flying field some designs also serve re straining devices prevent model taxi ing around back van station wagon during journey suggest consider such device dont already have Hi-start hazard isnt propellers can cause injuries modelers hands letter Joshua Fiero East Lyme CT points out hi-startprobably commonly used Sailplane launching devicecan also bite un wary Editors note unfamiliar hi-start launching device consists con siderable lengthperhaps 100 ft thickwalled rubber surgical tubing attached end stake driven ground other end lengthperhaps 400 ft monofilament braided nylon line free end line attached towhook Sailplane flier pulls plane back consid erable distance stretch rubber tube re leases noodel flight force rubber tube returning its unstretched length im parts sufficient force tow model aloft after end towline falls free towhook RMcM Joshua described incident follows Several weeks ago Gentle Lady Sailplane using hi-start-type launch device being pre pared flight pilots assistant too fansil iar RC flying assisting operation helping bring tension nylon launch line Continued page 20 00 E~ri wM 64 503 2 75 25ygtCe0201/419132714542613001/006 3005 CaLina PsySa12397842 19C,L1s 004 N625990-9* 17F55, 07 FEc1492110 310ay1a G,se117178351807 2 7032 13SapernaE1eo 165157228441660 24 8035 36 0a1fhAk1472102316 ICALP161 35t,/ EE,La #11271841208240Lck 6155 430,e AvengBe 3sF301440169032F,d JAl465 425, 0170 Ft. 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* PRICES FOR ALL DESIGNS 1* AGO AND INSUEANCE.A800T IHOISAND ADDITIONAL PLANS MANY 5/165S Ia 13650 375 CATALOG $200 09 PRICE LIST ALONE 9/ FREE lE FOREIGN bC CAN & MEO/ 03___g /2/6/ 6El~O Model 8 DETROIT AVSNaE CLEVEtAWO OHIO 44102 18 Model Aviation 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 DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm and 930 pm EST Mon & Wed DAVIS DiESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 pilot backing up almost ready hand-launch assistant fore warned about possibility taken un awares holding tension nylon line bare hand nylon line broke para chute attachment point near plane assistant sustained hand injuries consist ing burn-cut groove across three four fingers Amazingly no bleeding drop blood being medic would guess fast-moving nylon line auto matically cauterized cut due extremely high temperature generated its friction cut through tissues lack bleeding cut estimated up %-in deep probably blessing Think simple cut nice newX-Acto other hobby knife blade bleeds slips finger can recall incident experienced number years ago could have simi lar results time Graupner Cirrus Sailplane frequently launched histart occasion pulling nylon line back launch site local recreational area sawn-off VW appeared field some off-road cavorting Despite shouted warnings its driver went straight nylon line hi-start needless say dropped like hot potato seen VW approaching too might have fingers cau terized severed Whether use histart winch launch Sailplane treat line extreme caution respect Four-stroke backfire solution recent letter Duke Iden described yet another incident prop thrown four-stroke engine resulted trip hospital Dukes letter Continued page 22 1/6 scale fully poseable 12 action pilots dressed in-removable fabric flight gear time No painting assembly required WWI & Civilian weigh 6 oz WWII pilot has removable Parachute Mae West weighs 8 oz Add $325 per figure P&H Calif res add sales tax Allow 10 days delivery Note Pilots can also fly 1/5 scale ships Send Check money order MGA Enterprises PO Box 626 Dept Fresno Calif 93709 20 Model Aviation F mga pilots 1 N1ORE POWEii WITH LESS NOISE four-cycle measuring up expectations read IAVEY YSTEMS Performance Quiet Clean Electric Power THE HERONBILL WINTERS SENSATIONAL HERON NEW SPORT/COMPETITION DESIGN FOR 05/ 075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE COMBINES NEW SPECIAL AIRFOIL AND LIFTING STABILATOR FOR GREAT PER FORMANCE 65 SPAN 545 SQ AREA AND 440Z LUCIFERAIWO METER EASY TO BUILD AND FLY SAILPLANE FOR THE NOVICE OR COMPETITOR USING THE POPULAR PROPHET SERIES MODIFIED E-193 AIRFOIL DESIGNED FOR 05/075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE CAN ALSO BE FLOWN WITH 15 COBALT MOTORS OR 049 ENGINES 78 SPAN 600 SQ AREA AND 40 OZ ALL DAVEY SYSTEMS ELECTRIC KITS ARE NOW AVAILABLE WITH THE NEW 075 HYPERTHRUST MOTOR AND SWITCH HARNESS ON THE MOTOR SWITCH HARNESS AND GEAR REDUCER MOTOR/HARNESS MOTOR/HARNESS/GEARS follows also describes solution _________________________________________ problem Talk about timing Ive just returned hospital after getting seven stitches right index fingerthe use start engines As lying bed wonderful wife brought September issue Model Avia tion started article headline jumped right out uddy system could save life Four-stroke engines still throw props Boy Talk about timely journalism Heres story started five weeks Id rebuilding scratch-built -scale Tay loreraft Sid Morgan plans plane got new radio 48-size four-cycle engine inverted installation using 15%-nitro fuel 12-6 prop did use electric starter start several timesbut made certain really tighten nut hand-starting engine half-throttle setting per instructions Suddenly engine fired prop flew off towards inflicted deep cut finger hit lip Im glad wasnt . Meanwhile finger bleeding like sieve Now wonderful wife buddy sys tem clubs field like others real close help injuries serious nature could present problem solo flier Earlier morning loading van Sue asked would like go has always very understanding backs hobby lucky am said Sure several minutes ready go T-Crafts maiden flight bit ner vous As can see darned good thing wife came because time Continued page 133 22 Model Aviation TRIM KNIFE * -M vrnI RAVEY675 TOWER LANE YSTEMSWEST CHESTER PA 19380 oRPORATION Trim Knife designed precisely edge trim excess cover ing material model Can used outside edges straight curved Blade can set ftom 1/16 1/4 mith simple adjustmest screm Trim Knife mill make perfect overlap butt seams Works cover rg materials 6 blades Trim Knife Set includes B blades Trim Knife Blades 5 per pack 1987 NATIONAL CHAMPION Tony Frackowiak shown winning FAI RC Pattern 1987 NATS original design LENGE IV CHALLENGE IV available basic kit featuring epoxyglass fuselage foam wings stab $14995 Deluxe Kit $35000 much assem bly complete exceptionally smooth pre cise flying aircraft equally adept AMA FAI pattern Much individual preference can accomodated including choice Tn-Gear Tail Dragger 790 sq wing 820 sq depending desired flight speed C\Soe\C $8je ~ ietractS9 GO& par1terSs a0d atpiP~3 ~oyS oriented public relations better way us go Martin Dilly West Wickham Kent England can t think anyone wouldn t like see high respect airplane mod eling general public unfortunate ly doesnt seem magic answers assure giant leap di rection Safety/Preston Continued page 22 accident no else field Just two minutes before accident two other members left leaving just two us accident happened grabbed torn finger Sue helped load van drove nearby fire station para medic gave preliminary check said going live bound up wound off went hospital After receiving seven stitches finger several days later returned field T-Craft did again time prop flew off hit leg no hospital trip time made deep cut After lengthy dis cussion club president engine expert Frank Warren electronics expert Ron Roeder bought zero-to-five-ohm wirewound rheostat could handle 25 amps found local surplus outlet $150 also picked up toggle switch 50 cents lit tle fellows went power panel field box Since Ive no problems Frank Ron contended glow plug getting too much juice causing detonation problem loosening prop nut causing insurance company shudder would recommend addition anyone firing up four-stroke toggle switch works kill-switch glow plug can cut heat quickly havent personally tried out Dukes sugges tion However worked him may work others Meanwhile wonder engine manufacturers going provide some means positively retain prop nut shaft column has discussed several methods have suggested readers its ex actly new technology wrap up months column letter Joe Wagner New Wilmington PA points out buddy system infallible Ill let Joe tell tale Im responding latest column Sep tember 87 mentioning buddy tystem good bit model flying alone although Ive never problems agree its better have buddy along However make sure youve got dependable An experience back 1942 case point building solid Scale models friend basement big knife using roughly shape Short Stirling fuse lage slipped made huge gash hand Blood everywhere before could pick up rag slow flow turned buddy help saw him collapsed heap floor learned later despite Boy Scout training merit badges First Aid friend people simply can stand sight blood did know Bleeding hand managed carry friend upstairs alone house lay him down couch make sure breathing OK before left made way doctors office circumstances Id have better off alone now wonder about some peo ple occasionally fly would react case bloody accident Maybe ought ask themtactfully course Have another safe month John Preston 2812 Northampton St N W Washington DC 20015 TR-260/Shepherd Continued page 34 Select some grain 3/ sheet tur fledeck sides cut little oversize Wet outside sheet will curve over formers stringers easily use CyA glue attach Sand top sheets flush formers top stringers glue -in light sheet top Cut excess off sides A-in sheet sand top long straight block Glue landing gear plate place epoxy Glue bottom A-in sheet place December 1987 133 U Letters Editor Continued page 12
Edition: Model Aviation - 1987/12
Page Numbers: 14, 16, 18, 20, 22, 133
___John Preston___________________________ Safety Comes First ENGINES Starting techniques injury asso ciated sport model airplanes frequently reported laceration caused contact rotating propeller Judging mail seems likely time mod elers will contact turning prop during en gine starting/tuning operation models engine equipped throttle case installations Free Flight Control Line models have no alternative flip prop expect engine scream full bore minute fires However greatest number AMA members fly radio-controlled models en gines models equipped throt tle So full-throttle starts can beand opinion should beavoided Therefore some surprise read some engine-starting instructions sent Peter Jacobitz modeler East Boston MA instructions contained fol lowing note carbureted engines throt tle valve should wide open during engine starting letter Peter asked correct invitation disaster give en gines manufacturer fair due instructions did also state Make sure holding airplane firmly prevent suddenly lurch ing forward engine starts other words followed engine-starting directions disaster should averted However curious learn whether particular engine required wide-open throt tie order start easily wrote man ufacturer response received another instruction sheet particular engine manufacturer proposed changes starting instructions will read follows 1 booster battery disconnected turn needle valve counterclockwise two turns fully closed position 2 throttle wide open place fin gertip over carburetor inlet flip propel ler quickly two times prime engine 3 Remove fingertip carburetor inlet close throttle fast idle setting flip propeller quickly two three times booster battery still disconnected NOTE Make sure holding airplane firmly prevent lurching forward engine starts After starts maintain hold until have reduced throttle lowidle setting 4 Connect booster battery clip glow plug 5 Slowly turn propeller counterclock wise feel momentary resistance indicates ignltion mixture cyl inder 6 Quickly flip propeller start en gine disconnect booster battery much prefer starting instructions both Wanted Reliable bud dies buddy system Sailplane towlines deserve re spect Safe enginestarting procedures safety experience ease start ing case Im boring experienced modelers let throw anecdote true story incident occurred few years ago nearby airport pilot full-scale aircraft flipped prop engines throttle wide open aircraft DeHavilland Tiger Moth flies barnstorming-type air show Sunday during summer airfield Vir ginla Its owner experiencing engine starting problems several weeks would frequently become flooded during operation solution flooding problem ro tate propeller through several revolutions hand Tiger Moth has no starter e b throttle wide open day inci dent owner friend arrived late air field airplane hangared luck would have engine didnt want start became flooded owners friend front cockpit instructed open throttle Im sure whether also told turn off magneto ignition switches Anyway owner pulled prop through compression engine burst life aircraft proceeded accelerate down taxiway between two rows hangars Editors note Unless liger Moth modified no wheel brakesthe plane relies drag tail skid slow down under normal circumstances RMcM told own ers friend airline pilot either familiar Tiger Moths just plain reacted too late result aircraft became airborne hit dirt embankment end taxiway However flight short-lived because struck some telephone wires other side embankment ended up its nose field Fortunately no body injuredjust plane story about heard after inci dent happened because British Continued page 16 /I 7 II AND ThEN TI-IE PROP FLEW OFF OF TWE 4STROKE AND WOULD vtU 6ELIEVE mAr 0L LIG44TNIN& LARRY HERE ACTUALLY CAU14T THE SUCKER 14 Model Aviation column provided address items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily represent official position Academy Model Aeronautics ATTENTION AMA MEMBERS THE ALL NEW 11th EDITION Radio Control Buyers Guide IS HOT OFF THE PRESS Hobbyistts Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1 495 $1195 i $300 postage/handling RADIO CONTROL BUYERS GUIDE Clifton House ton VA 22024 may use VISA MasterCard citarpe payment sending card number expiration date order DGA Designs OS DGA. DCA Designs 0 0 0 It1 o5 S 0 SPORT BIPE QUARTER SCALE PLANS QuarterMaster Sport Ripe $21 Quadra 35.73Spafl.E-Z build. Great Flyer.SSe,,tutAcailacle.. DAViS 0-1K 905Spar. 0 Quadra 35 power similar. PPO 1933 KINNER SPORTSTER Model K.llrSpan 035 power FF0 s25 4-CYCLE PROJECTS t ts&E AKRON FUNK VS Scale SC span 60 Size 4 cycle. Fantastic Flyppo s21 ________0 S DlK603 Span.I C 45 4 cycle similar. caD S.j Two Inch scale Sixth scale $1933 KINNER SPORTSTER** 4 Model K. 78 Span. lt1-75.4cyPco5lO C** Photo -educed t-On 14 Scale plane. OTwo scat SlatS seal ________0 tdce OS PlanS coming Scale Piano t PHOTO DOCUMENTATION PACKS aoai table- 0 ALL PLANS ROLLEDSHIPPED UPS Complete wlnstructe, Booklet Send 5100 Catalog New York State SesOentS add 7% sales tax. Send check MO s. Allow 3 weeks tOr check clear S plane throttie works opposite direction conventional US planes just because assisted Tiger Moths owner starting another occasion prior accident What reversed British aircraft such Tiger Moth action engines magneto switches Up Off down Fur thermore mag switches Tiger Moth instrument panel US lightplanes mounted exterior fu selage left ofand betweenthe cockpits Its guess owners friend either familiar up-Off/down-On convention txtag switches didnt know located end story happier note Tiger repairable its owner still flying Sunday air shows overhauled engine now starts easily Before leaving subject engine-starting juries Id like repeat suggestion previ ously made April 1987 column reminded article Buddy Box newsletter Cloud Busters club California Under title Safety Notes editor Jacklast name known reported cident club member got arm arc 18-in prop being turned Big Banger Apparently no holding plane time incident because throt tle half-open plane started move engine came life Its owner instinctively moved hand stop model sustained arm lacerations required 100 stitches se cure As possible way avert such incidents future editor Buddy Box suggested Continued page 18 INTRODUCING NEW COLD WEATHER FRIEND YOU CAN COUNT ON TRANZMITTEN 0 Simple yet very effective 0 Keeps out wind cold o Will restrict hand motions 0 Made USA AMA modeler Fits Tx-Sturdy construct opolyoster filled nylon quilting oCotton jersey lining lD label 0Velcro closuresfastsure fit 0Choose RedBlue Brt Orange AMA patch included yourswell sewone free NO POSTAL HANDLING FEE send patchcolor choice SKYHI ENTERPRISE 422E 20th AVE COLUMBUS OHIO 43201 SATISFACTION GUARANTEED 16 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30I 1/16233 3/32240 1/8 243 3/16249 1/4 258 1/32337 1/20337 1/163374931 3/32 3445837 1/8 3547145 3/163828255 1/4 3739561 5/16385 3/8 3 88 124 71 1/2 3 110 155 3/4 3 165 1/1845876 48 3/3247084 56 1/9 4 85 106 66 3/164 93 122 75 1/4 4110 13484 3/6 4 165 225 1/2 4 225 261 MATCHED SHEETS 42 3/324100 1/84108 3/164120 1/44131 BALSA STICKS 3S4 1/16 1/409 1/16 3/610 1/16 1/214 3/32 1/410 3/32 3/912 3/32 1/216 1/8 1/606 1/9 1/411 1/8 3/812 1/8 1/216 3/163/1011 3/16 3/617 3/16 1/222 14 1/416 1/4 3/819 1/4 1/221 1/4 3/434 1/4 140 5/165/1621 3/8 3/827 3/6 1/232 3/8 3/442 36 152 1/2 1/236 12 3/446 1/2 150 5/6 5/646 3/4 3/467 BALSA HOT LINE Call 806 7456394 10 ant -6pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 3I iwj~rwLIGHT4-6 LB BALSA TRIANGLES 36WOOD36 4 4251/32349 36 38301/20349 2 2391/16349 34 34453/32358 551/8367 63/16376 8BALSA PLANKS361/4395 24853/83115 62501/23139 32003/43220 301429613300 2411/232751/16479 2611/243603/32491 30222251/84100 44233253/164117 244351/44138 28334953/94207 37346881/24292 46 65TAPERED SHEETS36 1/4265TRAILING EDGE36 531/43951/4132 623/82685/1611/439 3/83963/81 1/246 1/231201/2270 LONE STAR EPOXY 0 oz111845 5,,588 1511/IT588 30 nli598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa BASSWOOD 3/16 3/16 3/181/4 3/163/8 3/16 1/2 3/163/4 1/4 1/4 1/4 3/8 1/43/4 3/83/8 3/6 1/2 3/8 3/4 1/2 1/2 1/2 3/4 4 26 39 39 46 50 42 49 88 80 70 90 90 100 BUNDLEDEALS 201/6338695 201/164361020 203/32336841 153/32439955 151/8336715 101/8439675 153/16338900 103/18436810 101/4339630 101/4439890 103/8336650 5-3/8436629 51/2334540 INSTANT CLUE 51/2436855 1 o TS6 296 103/32448845 1 sThi 299 51/8446495 2eTSAk 550 53/16448985 2, rs 550 51/4446625 2 PINE STICKS 36 4 1/81/81317 1/61/41623 1/83/82027 3183/161724 3/16 3/92332 3/161/23040 1/4142637 1/43/93042 1/41/23447 3/6 3/83752 SPRUCESTICKS 36 4 1/8 1/815 1/8 1/41824 1/8 3/82039 3/163/162534 1/4 1/43145 1/4 3/83650 3/9 3/84583 3/8 1/25570 1/2 1/28086 12 3/48888 SPRUCE TRiANGLES 3/83/8 1/2 1/2 3/4 3/4 34651 11 77 HARD MAPLE 1/4 3/6 3/8 3/9 3/8 1/2 3/9 3/4 1/23/4 BIRCH DOWELS 1/8 3/16 1/4 5/16 3/8 18 40 45 50 58 58 36 00 11 14 25 32 3PLYBIRCN4 1/6412525 1/3212425 1/1812435 1/812450 SPLYBIRCH4 3/3212570 1/812585 3/1812595 1/412600 GROOVED LG. MOUNTS 82 lecheR LaTE PLY43/83/411/8/40 1/861503/83/4/5/32/40 1/8123881/23/4/3/18/45 Handling ChargeS300 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Master Card personal checks COD 4-118% ta Teas US currency Mnmam Order $1000 PILOT GLASSES Safety Products Modelers Modelers Sunglasses ANSI Z871 approved safety glasses Rts over prescription glasses Extremely light weight additional comfort Free-flow ventilation system temples Wrap around side protection Anti-fog Anti-ultraviolet radiation Available clear gray mirror case included Clear $1095Gray $1195 Mirror $1495 CYA Mask 5 1BC Halon Fire Extinguisher $1495 Shipping handling add $275 Visa Mastercard accepted NO CODs Send cashiers check money order Safety Plus _________PO Box 1173 FLU5924-9640 cmlton MS members try use airplane-restraining device much possible included cop ies photographs three such devices featured April 1987 Safety col umn Yes means item lug out flying field some designs also serve re straining devices prevent model taxi ing around back van station wagon during journey suggest consider such device dont already have Hi-start hazard isnt propellers can cause injuries modelers hands letter Joshua Fiero East Lyme CT points out hi-startprobably commonly used Sailplane launching devicecan also bite un wary Editors note unfamiliar hi-start launching device consists con siderable lengthperhaps 100 ft thickwalled rubber surgical tubing attached end stake driven ground other end lengthperhaps 400 ft monofilament braided nylon line free end line attached towhook Sailplane flier pulls plane back consid erable distance stretch rubber tube re leases noodel flight force rubber tube returning its unstretched length im parts sufficient force tow model aloft after end towline falls free towhook RMcM Joshua described incident follows Several weeks ago Gentle Lady Sailplane using hi-start-type launch device being pre pared flight pilots assistant too fansil iar RC flying assisting operation helping bring tension nylon launch line Continued page 20 00 E~ri wM 64 503 2 75 25ygtCe0201/419132714542613001/006 3005 CaLina PsySa12397842 19C,L1s 004 N625990-9* 17F55, 07 FEc1492110 310ay1a G,se117178351807 2 7032 13SapernaE1eo 165157228441660 24 8035 36 0a1fhAk1472102316 ICALP161 35t,/ EE,La #11271841208240Lck 6155 430,e AvengBe 3sF301440169032F,d JAl465 425, 0170 Ft. 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* PRICES FOR ALL DESIGNS 1* AGO AND INSUEANCE.A800T IHOISAND ADDITIONAL PLANS MANY 5/165S Ia 13650 375 CATALOG $200 09 PRICE LIST ALONE 9/ FREE lE FOREIGN bC CAN & MEO/ 03___g /2/6/ 6El~O Model 8 DETROIT AVSNaE CLEVEtAWO OHIO 44102 18 Model Aviation 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 DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm and 930 pm EST Mon & Wed DAVIS DiESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 pilot backing up almost ready hand-launch assistant fore warned about possibility taken un awares holding tension nylon line bare hand nylon line broke para chute attachment point near plane assistant sustained hand injuries consist ing burn-cut groove across three four fingers Amazingly no bleeding drop blood being medic would guess fast-moving nylon line auto matically cauterized cut due extremely high temperature generated its friction cut through tissues lack bleeding cut estimated up %-in deep probably blessing Think simple cut nice newX-Acto other hobby knife blade bleeds slips finger can recall incident experienced number years ago could have simi lar results time Graupner Cirrus Sailplane frequently launched histart occasion pulling nylon line back launch site local recreational area sawn-off VW appeared field some off-road cavorting Despite shouted warnings its driver went straight nylon line hi-start needless say dropped like hot potato seen VW approaching too might have fingers cau terized severed Whether use histart winch launch Sailplane treat line extreme caution respect Four-stroke backfire solution recent letter Duke Iden described yet another incident prop thrown four-stroke engine resulted trip hospital Dukes letter Continued page 22 1/6 scale fully poseable 12 action pilots dressed in-removable fabric flight gear time No painting assembly required WWI & Civilian weigh 6 oz WWII pilot has removable Parachute Mae West weighs 8 oz Add $325 per figure P&H Calif res add sales tax Allow 10 days delivery Note Pilots can also fly 1/5 scale ships Send Check money order MGA Enterprises PO Box 626 Dept Fresno Calif 93709 20 Model Aviation F mga pilots 1 N1ORE POWEii WITH LESS NOISE four-cycle measuring up expectations read IAVEY YSTEMS Performance Quiet Clean Electric Power THE HERONBILL WINTERS SENSATIONAL HERON NEW SPORT/COMPETITION DESIGN FOR 05/ 075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE COMBINES NEW SPECIAL AIRFOIL AND LIFTING STABILATOR FOR GREAT PER FORMANCE 65 SPAN 545 SQ AREA AND 440Z LUCIFERAIWO METER EASY TO BUILD AND FLY SAILPLANE FOR THE NOVICE OR COMPETITOR USING THE POPULAR PROPHET SERIES MODIFIED E-193 AIRFOIL DESIGNED FOR 05/075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE CAN ALSO BE FLOWN WITH 15 COBALT MOTORS OR 049 ENGINES 78 SPAN 600 SQ AREA AND 40 OZ ALL DAVEY SYSTEMS ELECTRIC KITS ARE NOW AVAILABLE WITH THE NEW 075 HYPERTHRUST MOTOR AND SWITCH HARNESS ON THE MOTOR SWITCH HARNESS AND GEAR REDUCER MOTOR/HARNESS MOTOR/HARNESS/GEARS follows also describes solution _________________________________________ problem Talk about timing Ive just returned hospital after getting seven stitches right index fingerthe use start engines As lying bed wonderful wife brought September issue Model Avia tion started article headline jumped right out uddy system could save life Four-stroke engines still throw props Boy Talk about timely journalism Heres story started five weeks Id rebuilding scratch-built -scale Tay loreraft Sid Morgan plans plane got new radio 48-size four-cycle engine inverted installation using 15%-nitro fuel 12-6 prop did use electric starter start several timesbut made certain really tighten nut hand-starting engine half-throttle setting per instructions Suddenly engine fired prop flew off towards inflicted deep cut finger hit lip Im glad wasnt . Meanwhile finger bleeding like sieve Now wonderful wife buddy sys tem clubs field like others real close help injuries serious nature could present problem solo flier Earlier morning loading van Sue asked would like go has always very understanding backs hobby lucky am said Sure several minutes ready go T-Crafts maiden flight bit ner vous As can see darned good thing wife came because time Continued page 133 22 Model Aviation TRIM KNIFE * -M vrnI RAVEY675 TOWER LANE YSTEMSWEST CHESTER PA 19380 oRPORATION Trim Knife designed precisely edge trim excess cover ing material model Can used outside edges straight curved Blade can set ftom 1/16 1/4 mith simple adjustmest screm Trim Knife mill make perfect overlap butt seams Works cover rg materials 6 blades Trim Knife Set includes B blades Trim Knife Blades 5 per pack 1987 NATIONAL CHAMPION Tony Frackowiak shown winning FAI RC Pattern 1987 NATS original design LENGE IV CHALLENGE IV available basic kit featuring epoxyglass fuselage foam wings stab $14995 Deluxe Kit $35000 much assem bly complete exceptionally smooth pre cise flying aircraft equally adept AMA FAI pattern Much individual preference can accomodated including choice Tn-Gear Tail Dragger 790 sq wing 820 sq depending desired flight speed C\Soe\C $8je ~ ietractS9 GO& par1terSs a0d atpiP~3 ~oyS oriented public relations better way us go Martin Dilly West Wickham Kent England can t think anyone wouldn t like see high respect airplane mod eling general public unfortunate ly doesnt seem magic answers assure giant leap di rection Safety/Preston Continued page 22 accident no else field Just two minutes before accident two other members left leaving just two us accident happened grabbed torn finger Sue helped load van drove nearby fire station para medic gave preliminary check said going live bound up wound off went hospital After receiving seven stitches finger several days later returned field T-Craft did again time prop flew off hit leg no hospital trip time made deep cut After lengthy dis cussion club president engine expert Frank Warren electronics expert Ron Roeder bought zero-to-five-ohm wirewound rheostat could handle 25 amps found local surplus outlet $150 also picked up toggle switch 50 cents lit tle fellows went power panel field box Since Ive no problems Frank Ron contended glow plug getting too much juice causing detonation problem loosening prop nut causing insurance company shudder would recommend addition anyone firing up four-stroke toggle switch works kill-switch glow plug can cut heat quickly havent personally tried out Dukes sugges tion However worked him may work others Meanwhile wonder engine manufacturers going provide some means positively retain prop nut shaft column has discussed several methods have suggested readers its ex actly new technology wrap up months column letter Joe Wagner New Wilmington PA points out buddy system infallible Ill let Joe tell tale Im responding latest column Sep tember 87 mentioning buddy tystem good bit model flying alone although Ive never problems agree its better have buddy along However make sure youve got dependable An experience back 1942 case point building solid Scale models friend basement big knife using roughly shape Short Stirling fuse lage slipped made huge gash hand Blood everywhere before could pick up rag slow flow turned buddy help saw him collapsed heap floor learned later despite Boy Scout training merit badges First Aid friend people simply can stand sight blood did know Bleeding hand managed carry friend upstairs alone house lay him down couch make sure breathing OK before left made way doctors office circumstances Id have better off alone now wonder about some peo ple occasionally fly would react case bloody accident Maybe ought ask themtactfully course Have another safe month John Preston 2812 Northampton St N W Washington DC 20015 TR-260/Shepherd Continued page 34 Select some grain 3/ sheet tur fledeck sides cut little oversize Wet outside sheet will curve over formers stringers easily use CyA glue attach Sand top sheets flush formers top stringers glue -in light sheet top Cut excess off sides A-in sheet sand top long straight block Glue landing gear plate place epoxy Glue bottom A-in sheet place December 1987 133 U Letters Editor Continued page 12
Edition: Model Aviation - 1987/12
Page Numbers: 14, 16, 18, 20, 22, 133
___John Preston___________________________ Safety Comes First ENGINES Starting techniques injury asso ciated sport model airplanes frequently reported laceration caused contact rotating propeller Judging mail seems likely time mod elers will contact turning prop during en gine starting/tuning operation models engine equipped throttle case installations Free Flight Control Line models have no alternative flip prop expect engine scream full bore minute fires However greatest number AMA members fly radio-controlled models en gines models equipped throt tle So full-throttle starts can beand opinion should beavoided Therefore some surprise read some engine-starting instructions sent Peter Jacobitz modeler East Boston MA instructions contained fol lowing note carbureted engines throt tle valve should wide open during engine starting letter Peter asked correct invitation disaster give en gines manufacturer fair due instructions did also state Make sure holding airplane firmly prevent suddenly lurch ing forward engine starts other words followed engine-starting directions disaster should averted However curious learn whether particular engine required wide-open throt tie order start easily wrote man ufacturer response received another instruction sheet particular engine manufacturer proposed changes starting instructions will read follows 1 booster battery disconnected turn needle valve counterclockwise two turns fully closed position 2 throttle wide open place fin gertip over carburetor inlet flip propel ler quickly two times prime engine 3 Remove fingertip carburetor inlet close throttle fast idle setting flip propeller quickly two three times booster battery still disconnected NOTE Make sure holding airplane firmly prevent lurching forward engine starts After starts maintain hold until have reduced throttle lowidle setting 4 Connect booster battery clip glow plug 5 Slowly turn propeller counterclock wise feel momentary resistance indicates ignltion mixture cyl inder 6 Quickly flip propeller start en gine disconnect booster battery much prefer starting instructions both Wanted Reliable bud dies buddy system Sailplane towlines deserve re spect Safe enginestarting procedures safety experience ease start ing case Im boring experienced modelers let throw anecdote true story incident occurred few years ago nearby airport pilot full-scale aircraft flipped prop engines throttle wide open aircraft DeHavilland Tiger Moth flies barnstorming-type air show Sunday during summer airfield Vir ginla Its owner experiencing engine starting problems several weeks would frequently become flooded during operation solution flooding problem ro tate propeller through several revolutions hand Tiger Moth has no starter e b throttle wide open day inci dent owner friend arrived late air field airplane hangared luck would have engine didnt want start became flooded owners friend front cockpit instructed open throttle Im sure whether also told turn off magneto ignition switches Anyway owner pulled prop through compression engine burst life aircraft proceeded accelerate down taxiway between two rows hangars Editors note Unless liger Moth modified no wheel brakesthe plane relies drag tail skid slow down under normal circumstances RMcM told own ers friend airline pilot either familiar Tiger Moths just plain reacted too late result aircraft became airborne hit dirt embankment end taxiway However flight short-lived because struck some telephone wires other side embankment ended up its nose field Fortunately no body injuredjust plane story about heard after inci dent happened because British Continued page 16 /I 7 II AND ThEN TI-IE PROP FLEW OFF OF TWE 4STROKE AND WOULD vtU 6ELIEVE mAr 0L LIG44TNIN& LARRY HERE ACTUALLY CAU14T THE SUCKER 14 Model Aviation column provided address items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily represent official position Academy Model Aeronautics ATTENTION AMA MEMBERS THE ALL NEW 11th EDITION Radio Control Buyers Guide IS HOT OFF THE PRESS Hobbyistts Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1 495 $1195 i $300 postage/handling RADIO CONTROL BUYERS GUIDE Clifton House ton VA 22024 may use VISA MasterCard citarpe payment sending card number expiration date order DGA Designs OS DGA. DCA Designs 0 0 0 It1 o5 S 0 SPORT BIPE QUARTER SCALE PLANS QuarterMaster Sport Ripe $21 Quadra 35.73Spafl.E-Z build. Great Flyer.SSe,,tutAcailacle.. DAViS 0-1K 905Spar. 0 Quadra 35 power similar. PPO 1933 KINNER SPORTSTER Model K.llrSpan 035 power FF0 s25 4-CYCLE PROJECTS t ts&E AKRON FUNK VS Scale SC span 60 Size 4 cycle. Fantastic Flyppo s21 ________0 S DlK603 Span.I C 45 4 cycle similar. caD S.j Two Inch scale Sixth scale $1933 KINNER SPORTSTER** 4 Model K. 78 Span. lt1-75.4cyPco5lO C** Photo -educed t-On 14 Scale plane. OTwo scat SlatS seal ________0 tdce OS PlanS coming Scale Piano t PHOTO DOCUMENTATION PACKS aoai table- 0 ALL PLANS ROLLEDSHIPPED UPS Complete wlnstructe, Booklet Send 5100 Catalog New York State SesOentS add 7% sales tax. Send check MO s. Allow 3 weeks tOr check clear S plane throttie works opposite direction conventional US planes just because assisted Tiger Moths owner starting another occasion prior accident What reversed British aircraft such Tiger Moth action engines magneto switches Up Off down Fur thermore mag switches Tiger Moth instrument panel US lightplanes mounted exterior fu selage left ofand betweenthe cockpits Its guess owners friend either familiar up-Off/down-On convention txtag switches didnt know located end story happier note Tiger repairable its owner still flying Sunday air shows overhauled engine now starts easily Before leaving subject engine-starting juries Id like repeat suggestion previ ously made April 1987 column reminded article Buddy Box newsletter Cloud Busters club California Under title Safety Notes editor Jacklast name known reported cident club member got arm arc 18-in prop being turned Big Banger Apparently no holding plane time incident because throt tle half-open plane started move engine came life Its owner instinctively moved hand stop model sustained arm lacerations required 100 stitches se cure As possible way avert such incidents future editor Buddy Box suggested Continued page 18 INTRODUCING NEW COLD WEATHER FRIEND YOU CAN COUNT ON TRANZMITTEN 0 Simple yet very effective 0 Keeps out wind cold o Will restrict hand motions 0 Made USA AMA modeler Fits Tx-Sturdy construct opolyoster filled nylon quilting oCotton jersey lining lD label 0Velcro closuresfastsure fit 0Choose RedBlue Brt Orange AMA patch included yourswell sewone free NO POSTAL HANDLING FEE send patchcolor choice SKYHI ENTERPRISE 422E 20th AVE COLUMBUS OHIO 43201 SATISFACTION GUARANTEED 16 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30I 1/16233 3/32240 1/8 243 3/16249 1/4 258 1/32337 1/20337 1/163374931 3/32 3445837 1/8 3547145 3/163828255 1/4 3739561 5/16385 3/8 3 88 124 71 1/2 3 110 155 3/4 3 165 1/1845876 48 3/3247084 56 1/9 4 85 106 66 3/164 93 122 75 1/4 4110 13484 3/6 4 165 225 1/2 4 225 261 MATCHED SHEETS 42 3/324100 1/84108 3/164120 1/44131 BALSA STICKS 3S4 1/16 1/409 1/16 3/610 1/16 1/214 3/32 1/410 3/32 3/912 3/32 1/216 1/8 1/606 1/9 1/411 1/8 3/812 1/8 1/216 3/163/1011 3/16 3/617 3/16 1/222 14 1/416 1/4 3/819 1/4 1/221 1/4 3/434 1/4 140 5/165/1621 3/8 3/827 3/6 1/232 3/8 3/442 36 152 1/2 1/236 12 3/446 1/2 150 5/6 5/646 3/4 3/467 BALSA HOT LINE Call 806 7456394 10 ant -6pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 3I iwj~rwLIGHT4-6 LB BALSA TRIANGLES 36WOOD36 4 4251/32349 36 38301/20349 2 2391/16349 34 34453/32358 551/8367 63/16376 8BALSA PLANKS361/4395 24853/83115 62501/23139 32003/43220 301429613300 2411/232751/16479 2611/243603/32491 30222251/84100 44233253/164117 244351/44138 28334953/94207 37346881/24292 46 65TAPERED SHEETS36 1/4265TRAILING EDGE36 531/43951/4132 623/82685/1611/439 3/83963/81 1/246 1/231201/2270 LONE STAR EPOXY 0 oz111845 5,,588 1511/IT588 30 nli598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa BASSWOOD 3/16 3/16 3/181/4 3/163/8 3/16 1/2 3/163/4 1/4 1/4 1/4 3/8 1/43/4 3/83/8 3/6 1/2 3/8 3/4 1/2 1/2 1/2 3/4 4 26 39 39 46 50 42 49 88 80 70 90 90 100 BUNDLEDEALS 201/6338695 201/164361020 203/32336841 153/32439955 151/8336715 101/8439675 153/16338900 103/18436810 101/4339630 101/4439890 103/8336650 5-3/8436629 51/2334540 INSTANT CLUE 51/2436855 1 o TS6 296 103/32448845 1 sThi 299 51/8446495 2eTSAk 550 53/16448985 2, rs 550 51/4446625 2 PINE STICKS 36 4 1/81/81317 1/61/41623 1/83/82027 3183/161724 3/16 3/92332 3/161/23040 1/4142637 1/43/93042 1/41/23447 3/6 3/83752 SPRUCESTICKS 36 4 1/8 1/815 1/8 1/41824 1/8 3/82039 3/163/162534 1/4 1/43145 1/4 3/83650 3/9 3/84583 3/8 1/25570 1/2 1/28086 12 3/48888 SPRUCE TRiANGLES 3/83/8 1/2 1/2 3/4 3/4 34651 11 77 HARD MAPLE 1/4 3/6 3/8 3/9 3/8 1/2 3/9 3/4 1/23/4 BIRCH DOWELS 1/8 3/16 1/4 5/16 3/8 18 40 45 50 58 58 36 00 11 14 25 32 3PLYBIRCN4 1/6412525 1/3212425 1/1812435 1/812450 SPLYBIRCH4 3/3212570 1/812585 3/1812595 1/412600 GROOVED LG. MOUNTS 82 lecheR LaTE PLY43/83/411/8/40 1/861503/83/4/5/32/40 1/8123881/23/4/3/18/45 Handling ChargeS300 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Master Card personal checks COD 4-118% ta Teas US currency Mnmam Order $1000 PILOT GLASSES Safety Products Modelers Modelers Sunglasses ANSI Z871 approved safety glasses Rts over prescription glasses Extremely light weight additional comfort Free-flow ventilation system temples Wrap around side protection Anti-fog Anti-ultraviolet radiation Available clear gray mirror case included Clear $1095Gray $1195 Mirror $1495 CYA Mask 5 1BC Halon Fire Extinguisher $1495 Shipping handling add $275 Visa Mastercard accepted NO CODs Send cashiers check money order Safety Plus _________PO Box 1173 FLU5924-9640 cmlton MS members try use airplane-restraining device much possible included cop ies photographs three such devices featured April 1987 Safety col umn Yes means item lug out flying field some designs also serve re straining devices prevent model taxi ing around back van station wagon during journey suggest consider such device dont already have Hi-start hazard isnt propellers can cause injuries modelers hands letter Joshua Fiero East Lyme CT points out hi-startprobably commonly used Sailplane launching devicecan also bite un wary Editors note unfamiliar hi-start launching device consists con siderable lengthperhaps 100 ft thickwalled rubber surgical tubing attached end stake driven ground other end lengthperhaps 400 ft monofilament braided nylon line free end line attached towhook Sailplane flier pulls plane back consid erable distance stretch rubber tube re leases noodel flight force rubber tube returning its unstretched length im parts sufficient force tow model aloft after end towline falls free towhook RMcM Joshua described incident follows Several weeks ago Gentle Lady Sailplane using hi-start-type launch device being pre pared flight pilots assistant too fansil iar RC flying assisting operation helping bring tension nylon launch line Continued page 20 00 E~ri wM 64 503 2 75 25ygtCe0201/419132714542613001/006 3005 CaLina PsySa12397842 19C,L1s 004 N625990-9* 17F55, 07 FEc1492110 310ay1a G,se117178351807 2 7032 13SapernaE1eo 165157228441660 24 8035 36 0a1fhAk1472102316 ICALP161 35t,/ EE,La #11271841208240Lck 6155 430,e AvengBe 3sF301440169032F,d JAl465 425, 0170 Ft. 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* PRICES FOR ALL DESIGNS 1* AGO AND INSUEANCE.A800T IHOISAND ADDITIONAL PLANS MANY 5/165S Ia 13650 375 CATALOG $200 09 PRICE LIST ALONE 9/ FREE lE FOREIGN bC CAN & MEO/ 03___g /2/6/ 6El~O Model 8 DETROIT AVSNaE CLEVEtAWO OHIO 44102 18 Model Aviation 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 DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm and 930 pm EST Mon & Wed DAVIS DiESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 pilot backing up almost ready hand-launch assistant fore warned about possibility taken un awares holding tension nylon line bare hand nylon line broke para chute attachment point near plane assistant sustained hand injuries consist ing burn-cut groove across three four fingers Amazingly no bleeding drop blood being medic would guess fast-moving nylon line auto matically cauterized cut due extremely high temperature generated its friction cut through tissues lack bleeding cut estimated up %-in deep probably blessing Think simple cut nice newX-Acto other hobby knife blade bleeds slips finger can recall incident experienced number years ago could have simi lar results time Graupner Cirrus Sailplane frequently launched histart occasion pulling nylon line back launch site local recreational area sawn-off VW appeared field some off-road cavorting Despite shouted warnings its driver went straight nylon line hi-start needless say dropped like hot potato seen VW approaching too might have fingers cau terized severed Whether use histart winch launch Sailplane treat line extreme caution respect Four-stroke backfire solution recent letter Duke Iden described yet another incident prop thrown four-stroke engine resulted trip hospital Dukes letter Continued page 22 1/6 scale fully poseable 12 action pilots dressed in-removable fabric flight gear time No painting assembly required WWI & Civilian weigh 6 oz WWII pilot has removable Parachute Mae West weighs 8 oz Add $325 per figure P&H Calif res add sales tax Allow 10 days delivery Note Pilots can also fly 1/5 scale ships Send Check money order MGA Enterprises PO Box 626 Dept Fresno Calif 93709 20 Model Aviation F mga pilots 1 N1ORE POWEii WITH LESS NOISE four-cycle measuring up expectations read IAVEY YSTEMS Performance Quiet Clean Electric Power THE HERONBILL WINTERS SENSATIONAL HERON NEW SPORT/COMPETITION DESIGN FOR 05/ 075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE COMBINES NEW SPECIAL AIRFOIL AND LIFTING STABILATOR FOR GREAT PER FORMANCE 65 SPAN 545 SQ AREA AND 440Z LUCIFERAIWO METER EASY TO BUILD AND FLY SAILPLANE FOR THE NOVICE OR COMPETITOR USING THE POPULAR PROPHET SERIES MODIFIED E-193 AIRFOIL DESIGNED FOR 05/075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE CAN ALSO BE FLOWN WITH 15 COBALT MOTORS OR 049 ENGINES 78 SPAN 600 SQ AREA AND 40 OZ ALL DAVEY SYSTEMS ELECTRIC KITS ARE NOW AVAILABLE WITH THE NEW 075 HYPERTHRUST MOTOR AND SWITCH HARNESS ON THE MOTOR SWITCH HARNESS AND GEAR REDUCER MOTOR/HARNESS MOTOR/HARNESS/GEARS follows also describes solution _________________________________________ problem Talk about timing Ive just returned hospital after getting seven stitches right index fingerthe use start engines As lying bed wonderful wife brought September issue Model Avia tion started article headline jumped right out uddy system could save life Four-stroke engines still throw props Boy Talk about timely journalism Heres story started five weeks Id rebuilding scratch-built -scale Tay loreraft Sid Morgan plans plane got new radio 48-size four-cycle engine inverted installation using 15%-nitro fuel 12-6 prop did use electric starter start several timesbut made certain really tighten nut hand-starting engine half-throttle setting per instructions Suddenly engine fired prop flew off towards inflicted deep cut finger hit lip Im glad wasnt . Meanwhile finger bleeding like sieve Now wonderful wife buddy sys tem clubs field like others real close help injuries serious nature could present problem solo flier Earlier morning loading van Sue asked would like go has always very understanding backs hobby lucky am said Sure several minutes ready go T-Crafts maiden flight bit ner vous As can see darned good thing wife came because time Continued page 133 22 Model Aviation TRIM KNIFE * -M vrnI RAVEY675 TOWER LANE YSTEMSWEST CHESTER PA 19380 oRPORATION Trim Knife designed precisely edge trim excess cover ing material model Can used outside edges straight curved Blade can set ftom 1/16 1/4 mith simple adjustmest screm Trim Knife mill make perfect overlap butt seams Works cover rg materials 6 blades Trim Knife Set includes B blades Trim Knife Blades 5 per pack 1987 NATIONAL CHAMPION Tony Frackowiak shown winning FAI RC Pattern 1987 NATS original design LENGE IV CHALLENGE IV available basic kit featuring epoxyglass fuselage foam wings stab $14995 Deluxe Kit $35000 much assem bly complete exceptionally smooth pre cise flying aircraft equally adept AMA FAI pattern Much individual preference can accomodated including choice Tn-Gear Tail Dragger 790 sq wing 820 sq depending desired flight speed C\Soe\C $8je ~ ietractS9 GO& par1terSs a0d atpiP~3 ~oyS oriented public relations better way us go Martin Dilly West Wickham Kent England can t think anyone wouldn t like see high respect airplane mod eling general public unfortunate ly doesnt seem magic answers assure giant leap di rection Safety/Preston Continued page 22 accident no else field Just two minutes before accident two other members left leaving just two us accident happened grabbed torn finger Sue helped load van drove nearby fire station para medic gave preliminary check said going live bound up wound off went hospital After receiving seven stitches finger several days later returned field T-Craft did again time prop flew off hit leg no hospital trip time made deep cut After lengthy dis cussion club president engine expert Frank Warren electronics expert Ron Roeder bought zero-to-five-ohm wirewound rheostat could handle 25 amps found local surplus outlet $150 also picked up toggle switch 50 cents lit tle fellows went power panel field box Since Ive no problems Frank Ron contended glow plug getting too much juice causing detonation problem loosening prop nut causing insurance company shudder would recommend addition anyone firing up four-stroke toggle switch works kill-switch glow plug can cut heat quickly havent personally tried out Dukes sugges tion However worked him may work others Meanwhile wonder engine manufacturers going provide some means positively retain prop nut shaft column has discussed several methods have suggested readers its ex actly new technology wrap up months column letter Joe Wagner New Wilmington PA points out buddy system infallible Ill let Joe tell tale Im responding latest column Sep tember 87 mentioning buddy tystem good bit model flying alone although Ive never problems agree its better have buddy along However make sure youve got dependable An experience back 1942 case point building solid Scale models friend basement big knife using roughly shape Short Stirling fuse lage slipped made huge gash hand Blood everywhere before could pick up rag slow flow turned buddy help saw him collapsed heap floor learned later despite Boy Scout training merit badges First Aid friend people simply can stand sight blood did know Bleeding hand managed carry friend upstairs alone house lay him down couch make sure breathing OK before left made way doctors office circumstances Id have better off alone now wonder about some peo ple occasionally fly would react case bloody accident Maybe ought ask themtactfully course Have another safe month John Preston 2812 Northampton St N W Washington DC 20015 TR-260/Shepherd Continued page 34 Select some grain 3/ sheet tur fledeck sides cut little oversize Wet outside sheet will curve over formers stringers easily use CyA glue attach Sand top sheets flush formers top stringers glue -in light sheet top Cut excess off sides A-in sheet sand top long straight block Glue landing gear plate place epoxy Glue bottom A-in sheet place December 1987 133 U Letters Editor Continued page 12
Edition: Model Aviation - 1987/12
Page Numbers: 14, 16, 18, 20, 22, 133
___John Preston___________________________ Safety Comes First ENGINES Starting techniques injury asso ciated sport model airplanes frequently reported laceration caused contact rotating propeller Judging mail seems likely time mod elers will contact turning prop during en gine starting/tuning operation models engine equipped throttle case installations Free Flight Control Line models have no alternative flip prop expect engine scream full bore minute fires However greatest number AMA members fly radio-controlled models en gines models equipped throt tle So full-throttle starts can beand opinion should beavoided Therefore some surprise read some engine-starting instructions sent Peter Jacobitz modeler East Boston MA instructions contained fol lowing note carbureted engines throt tle valve should wide open during engine starting letter Peter asked correct invitation disaster give en gines manufacturer fair due instructions did also state Make sure holding airplane firmly prevent suddenly lurch ing forward engine starts other words followed engine-starting directions disaster should averted However curious learn whether particular engine required wide-open throt tie order start easily wrote man ufacturer response received another instruction sheet particular engine manufacturer proposed changes starting instructions will read follows 1 booster battery disconnected turn needle valve counterclockwise two turns fully closed position 2 throttle wide open place fin gertip over carburetor inlet flip propel ler quickly two times prime engine 3 Remove fingertip carburetor inlet close throttle fast idle setting flip propeller quickly two three times booster battery still disconnected NOTE Make sure holding airplane firmly prevent lurching forward engine starts After starts maintain hold until have reduced throttle lowidle setting 4 Connect booster battery clip glow plug 5 Slowly turn propeller counterclock wise feel momentary resistance indicates ignltion mixture cyl inder 6 Quickly flip propeller start en gine disconnect booster battery much prefer starting instructions both Wanted Reliable bud dies buddy system Sailplane towlines deserve re spect Safe enginestarting procedures safety experience ease start ing case Im boring experienced modelers let throw anecdote true story incident occurred few years ago nearby airport pilot full-scale aircraft flipped prop engines throttle wide open aircraft DeHavilland Tiger Moth flies barnstorming-type air show Sunday during summer airfield Vir ginla Its owner experiencing engine starting problems several weeks would frequently become flooded during operation solution flooding problem ro tate propeller through several revolutions hand Tiger Moth has no starter e b throttle wide open day inci dent owner friend arrived late air field airplane hangared luck would have engine didnt want start became flooded owners friend front cockpit instructed open throttle Im sure whether also told turn off magneto ignition switches Anyway owner pulled prop through compression engine burst life aircraft proceeded accelerate down taxiway between two rows hangars Editors note Unless liger Moth modified no wheel brakesthe plane relies drag tail skid slow down under normal circumstances RMcM told own ers friend airline pilot either familiar Tiger Moths just plain reacted too late result aircraft became airborne hit dirt embankment end taxiway However flight short-lived because struck some telephone wires other side embankment ended up its nose field Fortunately no body injuredjust plane story about heard after inci dent happened because British Continued page 16 /I 7 II AND ThEN TI-IE PROP FLEW OFF OF TWE 4STROKE AND WOULD vtU 6ELIEVE mAr 0L LIG44TNIN& LARRY HERE ACTUALLY CAU14T THE SUCKER 14 Model Aviation column provided address items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily represent official position Academy Model Aeronautics ATTENTION AMA MEMBERS THE ALL NEW 11th EDITION Radio Control Buyers Guide IS HOT OFF THE PRESS Hobbyistts Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1 495 $1195 i $300 postage/handling RADIO CONTROL BUYERS GUIDE Clifton House ton VA 22024 may use VISA MasterCard citarpe payment sending card number expiration date order DGA Designs OS DGA. DCA Designs 0 0 0 It1 o5 S 0 SPORT BIPE QUARTER SCALE PLANS QuarterMaster Sport Ripe $21 Quadra 35.73Spafl.E-Z build. Great Flyer.SSe,,tutAcailacle.. DAViS 0-1K 905Spar. 0 Quadra 35 power similar. PPO 1933 KINNER SPORTSTER Model K.llrSpan 035 power FF0 s25 4-CYCLE PROJECTS t ts&E AKRON FUNK VS Scale SC span 60 Size 4 cycle. Fantastic Flyppo s21 ________0 S DlK603 Span.I C 45 4 cycle similar. caD S.j Two Inch scale Sixth scale $1933 KINNER SPORTSTER** 4 Model K. 78 Span. lt1-75.4cyPco5lO C** Photo -educed t-On 14 Scale plane. OTwo scat SlatS seal ________0 tdce OS PlanS coming Scale Piano t PHOTO DOCUMENTATION PACKS aoai table- 0 ALL PLANS ROLLEDSHIPPED UPS Complete wlnstructe, Booklet Send 5100 Catalog New York State SesOentS add 7% sales tax. Send check MO s. Allow 3 weeks tOr check clear S plane throttie works opposite direction conventional US planes just because assisted Tiger Moths owner starting another occasion prior accident What reversed British aircraft such Tiger Moth action engines magneto switches Up Off down Fur thermore mag switches Tiger Moth instrument panel US lightplanes mounted exterior fu selage left ofand betweenthe cockpits Its guess owners friend either familiar up-Off/down-On convention txtag switches didnt know located end story happier note Tiger repairable its owner still flying Sunday air shows overhauled engine now starts easily Before leaving subject engine-starting juries Id like repeat suggestion previ ously made April 1987 column reminded article Buddy Box newsletter Cloud Busters club California Under title Safety Notes editor Jacklast name known reported cident club member got arm arc 18-in prop being turned Big Banger Apparently no holding plane time incident because throt tle half-open plane started move engine came life Its owner instinctively moved hand stop model sustained arm lacerations required 100 stitches se cure As possible way avert such incidents future editor Buddy Box suggested Continued page 18 INTRODUCING NEW COLD WEATHER FRIEND YOU CAN COUNT ON TRANZMITTEN 0 Simple yet very effective 0 Keeps out wind cold o Will restrict hand motions 0 Made USA AMA modeler Fits Tx-Sturdy construct opolyoster filled nylon quilting oCotton jersey lining lD label 0Velcro closuresfastsure fit 0Choose RedBlue Brt Orange AMA patch included yourswell sewone free NO POSTAL HANDLING FEE send patchcolor choice SKYHI ENTERPRISE 422E 20th AVE COLUMBUS OHIO 43201 SATISFACTION GUARANTEED 16 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30I 1/16233 3/32240 1/8 243 3/16249 1/4 258 1/32337 1/20337 1/163374931 3/32 3445837 1/8 3547145 3/163828255 1/4 3739561 5/16385 3/8 3 88 124 71 1/2 3 110 155 3/4 3 165 1/1845876 48 3/3247084 56 1/9 4 85 106 66 3/164 93 122 75 1/4 4110 13484 3/6 4 165 225 1/2 4 225 261 MATCHED SHEETS 42 3/324100 1/84108 3/164120 1/44131 BALSA STICKS 3S4 1/16 1/409 1/16 3/610 1/16 1/214 3/32 1/410 3/32 3/912 3/32 1/216 1/8 1/606 1/9 1/411 1/8 3/812 1/8 1/216 3/163/1011 3/16 3/617 3/16 1/222 14 1/416 1/4 3/819 1/4 1/221 1/4 3/434 1/4 140 5/165/1621 3/8 3/827 3/6 1/232 3/8 3/442 36 152 1/2 1/236 12 3/446 1/2 150 5/6 5/646 3/4 3/467 BALSA HOT LINE Call 806 7456394 10 ant -6pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 3I iwj~rwLIGHT4-6 LB BALSA TRIANGLES 36WOOD36 4 4251/32349 36 38301/20349 2 2391/16349 34 34453/32358 551/8367 63/16376 8BALSA PLANKS361/4395 24853/83115 62501/23139 32003/43220 301429613300 2411/232751/16479 2611/243603/32491 30222251/84100 44233253/164117 244351/44138 28334953/94207 37346881/24292 46 65TAPERED SHEETS36 1/4265TRAILING EDGE36 531/43951/4132 623/82685/1611/439 3/83963/81 1/246 1/231201/2270 LONE STAR EPOXY 0 oz111845 5,,588 1511/IT588 30 nli598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa BASSWOOD 3/16 3/16 3/181/4 3/163/8 3/16 1/2 3/163/4 1/4 1/4 1/4 3/8 1/43/4 3/83/8 3/6 1/2 3/8 3/4 1/2 1/2 1/2 3/4 4 26 39 39 46 50 42 49 88 80 70 90 90 100 BUNDLEDEALS 201/6338695 201/164361020 203/32336841 153/32439955 151/8336715 101/8439675 153/16338900 103/18436810 101/4339630 101/4439890 103/8336650 5-3/8436629 51/2334540 INSTANT CLUE 51/2436855 1 o TS6 296 103/32448845 1 sThi 299 51/8446495 2eTSAk 550 53/16448985 2, rs 550 51/4446625 2 PINE STICKS 36 4 1/81/81317 1/61/41623 1/83/82027 3183/161724 3/16 3/92332 3/161/23040 1/4142637 1/43/93042 1/41/23447 3/6 3/83752 SPRUCESTICKS 36 4 1/8 1/815 1/8 1/41824 1/8 3/82039 3/163/162534 1/4 1/43145 1/4 3/83650 3/9 3/84583 3/8 1/25570 1/2 1/28086 12 3/48888 SPRUCE TRiANGLES 3/83/8 1/2 1/2 3/4 3/4 34651 11 77 HARD MAPLE 1/4 3/6 3/8 3/9 3/8 1/2 3/9 3/4 1/23/4 BIRCH DOWELS 1/8 3/16 1/4 5/16 3/8 18 40 45 50 58 58 36 00 11 14 25 32 3PLYBIRCN4 1/6412525 1/3212425 1/1812435 1/812450 SPLYBIRCH4 3/3212570 1/812585 3/1812595 1/412600 GROOVED LG. MOUNTS 82 lecheR LaTE PLY43/83/411/8/40 1/861503/83/4/5/32/40 1/8123881/23/4/3/18/45 Handling ChargeS300 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Master Card personal checks COD 4-118% ta Teas US currency Mnmam Order $1000 PILOT GLASSES Safety Products Modelers Modelers Sunglasses ANSI Z871 approved safety glasses Rts over prescription glasses Extremely light weight additional comfort Free-flow ventilation system temples Wrap around side protection Anti-fog Anti-ultraviolet radiation Available clear gray mirror case included Clear $1095Gray $1195 Mirror $1495 CYA Mask 5 1BC Halon Fire Extinguisher $1495 Shipping handling add $275 Visa Mastercard accepted NO CODs Send cashiers check money order Safety Plus _________PO Box 1173 FLU5924-9640 cmlton MS members try use airplane-restraining device much possible included cop ies photographs three such devices featured April 1987 Safety col umn Yes means item lug out flying field some designs also serve re straining devices prevent model taxi ing around back van station wagon during journey suggest consider such device dont already have Hi-start hazard isnt propellers can cause injuries modelers hands letter Joshua Fiero East Lyme CT points out hi-startprobably commonly used Sailplane launching devicecan also bite un wary Editors note unfamiliar hi-start launching device consists con siderable lengthperhaps 100 ft thickwalled rubber surgical tubing attached end stake driven ground other end lengthperhaps 400 ft monofilament braided nylon line free end line attached towhook Sailplane flier pulls plane back consid erable distance stretch rubber tube re leases noodel flight force rubber tube returning its unstretched length im parts sufficient force tow model aloft after end towline falls free towhook RMcM Joshua described incident follows Several weeks ago Gentle Lady Sailplane using hi-start-type launch device being pre pared flight pilots assistant too fansil iar RC flying assisting operation helping bring tension nylon launch line Continued page 20 00 E~ri wM 64 503 2 75 25ygtCe0201/419132714542613001/006 3005 CaLina PsySa12397842 19C,L1s 004 N625990-9* 17F55, 07 FEc1492110 310ay1a G,se117178351807 2 7032 13SapernaE1eo 165157228441660 24 8035 36 0a1fhAk1472102316 ICALP161 35t,/ EE,La #11271841208240Lck 6155 430,e AvengBe 3sF301440169032F,d JAl465 425, 0170 Ft. 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* PRICES FOR ALL DESIGNS 1* AGO AND INSUEANCE.A800T IHOISAND ADDITIONAL PLANS MANY 5/165S Ia 13650 375 CATALOG $200 09 PRICE LIST ALONE 9/ FREE lE FOREIGN bC CAN & MEO/ 03___g /2/6/ 6El~O Model 8 DETROIT AVSNaE CLEVEtAWO OHIO 44102 18 Model Aviation 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 DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm and 930 pm EST Mon & Wed DAVIS DiESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 pilot backing up almost ready hand-launch assistant fore warned about possibility taken un awares holding tension nylon line bare hand nylon line broke para chute attachment point near plane assistant sustained hand injuries consist ing burn-cut groove across three four fingers Amazingly no bleeding drop blood being medic would guess fast-moving nylon line auto matically cauterized cut due extremely high temperature generated its friction cut through tissues lack bleeding cut estimated up %-in deep probably blessing Think simple cut nice newX-Acto other hobby knife blade bleeds slips finger can recall incident experienced number years ago could have simi lar results time Graupner Cirrus Sailplane frequently launched histart occasion pulling nylon line back launch site local recreational area sawn-off VW appeared field some off-road cavorting Despite shouted warnings its driver went straight nylon line hi-start needless say dropped like hot potato seen VW approaching too might have fingers cau terized severed Whether use histart winch launch Sailplane treat line extreme caution respect Four-stroke backfire solution recent letter Duke Iden described yet another incident prop thrown four-stroke engine resulted trip hospital Dukes letter Continued page 22 1/6 scale fully poseable 12 action pilots dressed in-removable fabric flight gear time No painting assembly required WWI & Civilian weigh 6 oz WWII pilot has removable Parachute Mae West weighs 8 oz Add $325 per figure P&H Calif res add sales tax Allow 10 days delivery Note Pilots can also fly 1/5 scale ships Send Check money order MGA Enterprises PO Box 626 Dept Fresno Calif 93709 20 Model Aviation F mga pilots 1 N1ORE POWEii WITH LESS NOISE four-cycle measuring up expectations read IAVEY YSTEMS Performance Quiet Clean Electric Power THE HERONBILL WINTERS SENSATIONAL HERON NEW SPORT/COMPETITION DESIGN FOR 05/ 075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE COMBINES NEW SPECIAL AIRFOIL AND LIFTING STABILATOR FOR GREAT PER FORMANCE 65 SPAN 545 SQ AREA AND 440Z LUCIFERAIWO METER EASY TO BUILD AND FLY SAILPLANE FOR THE NOVICE OR COMPETITOR USING THE POPULAR PROPHET SERIES MODIFIED E-193 AIRFOIL DESIGNED FOR 05/075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE CAN ALSO BE FLOWN WITH 15 COBALT MOTORS OR 049 ENGINES 78 SPAN 600 SQ AREA AND 40 OZ ALL DAVEY SYSTEMS ELECTRIC KITS ARE NOW AVAILABLE WITH THE NEW 075 HYPERTHRUST MOTOR AND SWITCH HARNESS ON THE MOTOR SWITCH HARNESS AND GEAR REDUCER MOTOR/HARNESS MOTOR/HARNESS/GEARS follows also describes solution _________________________________________ problem Talk about timing Ive just returned hospital after getting seven stitches right index fingerthe use start engines As lying bed wonderful wife brought September issue Model Avia tion started article headline jumped right out uddy system could save life Four-stroke engines still throw props Boy Talk about timely journalism Heres story started five weeks Id rebuilding scratch-built -scale Tay loreraft Sid Morgan plans plane got new radio 48-size four-cycle engine inverted installation using 15%-nitro fuel 12-6 prop did use electric starter start several timesbut made certain really tighten nut hand-starting engine half-throttle setting per instructions Suddenly engine fired prop flew off towards inflicted deep cut finger hit lip Im glad wasnt . Meanwhile finger bleeding like sieve Now wonderful wife buddy sys tem clubs field like others real close help injuries serious nature could present problem solo flier Earlier morning loading van Sue asked would like go has always very understanding backs hobby lucky am said Sure several minutes ready go T-Crafts maiden flight bit ner vous As can see darned good thing wife came because time Continued page 133 22 Model Aviation TRIM KNIFE * -M vrnI RAVEY675 TOWER LANE YSTEMSWEST CHESTER PA 19380 oRPORATION Trim Knife designed precisely edge trim excess cover ing material model Can used outside edges straight curved Blade can set ftom 1/16 1/4 mith simple adjustmest screm Trim Knife mill make perfect overlap butt seams Works cover rg materials 6 blades Trim Knife Set includes B blades Trim Knife Blades 5 per pack 1987 NATIONAL CHAMPION Tony Frackowiak shown winning FAI RC Pattern 1987 NATS original design LENGE IV CHALLENGE IV available basic kit featuring epoxyglass fuselage foam wings stab $14995 Deluxe Kit $35000 much assem bly complete exceptionally smooth pre cise flying aircraft equally adept AMA FAI pattern Much individual preference can accomodated including choice Tn-Gear Tail Dragger 790 sq wing 820 sq depending desired flight speed C\Soe\C $8je ~ ietractS9 GO& par1terSs a0d atpiP~3 ~oyS oriented public relations better way us go Martin Dilly West Wickham Kent England can t think anyone wouldn t like see high respect airplane mod eling general public unfortunate ly doesnt seem magic answers assure giant leap di rection Safety/Preston Continued page 22 accident no else field Just two minutes before accident two other members left leaving just two us accident happened grabbed torn finger Sue helped load van drove nearby fire station para medic gave preliminary check said going live bound up wound off went hospital After receiving seven stitches finger several days later returned field T-Craft did again time prop flew off hit leg no hospital trip time made deep cut After lengthy dis cussion club president engine expert Frank Warren electronics expert Ron Roeder bought zero-to-five-ohm wirewound rheostat could handle 25 amps found local surplus outlet $150 also picked up toggle switch 50 cents lit tle fellows went power panel field box Since Ive no problems Frank Ron contended glow plug getting too much juice causing detonation problem loosening prop nut causing insurance company shudder would recommend addition anyone firing up four-stroke toggle switch works kill-switch glow plug can cut heat quickly havent personally tried out Dukes sugges tion However worked him may work others Meanwhile wonder engine manufacturers going provide some means positively retain prop nut shaft column has discussed several methods have suggested readers its ex actly new technology wrap up months column letter Joe Wagner New Wilmington PA points out buddy system infallible Ill let Joe tell tale Im responding latest column Sep tember 87 mentioning buddy tystem good bit model flying alone although Ive never problems agree its better have buddy along However make sure youve got dependable An experience back 1942 case point building solid Scale models friend basement big knife using roughly shape Short Stirling fuse lage slipped made huge gash hand Blood everywhere before could pick up rag slow flow turned buddy help saw him collapsed heap floor learned later despite Boy Scout training merit badges First Aid friend people simply can stand sight blood did know Bleeding hand managed carry friend upstairs alone house lay him down couch make sure breathing OK before left made way doctors office circumstances Id have better off alone now wonder about some peo ple occasionally fly would react case bloody accident Maybe ought ask themtactfully course Have another safe month John Preston 2812 Northampton St N W Washington DC 20015 TR-260/Shepherd Continued page 34 Select some grain 3/ sheet tur fledeck sides cut little oversize Wet outside sheet will curve over formers stringers easily use CyA glue attach Sand top sheets flush formers top stringers glue -in light sheet top Cut excess off sides A-in sheet sand top long straight block Glue landing gear plate place epoxy Glue bottom A-in sheet place December 1987 133 U Letters Editor Continued page 12
Edition: Model Aviation - 1987/12
Page Numbers: 14, 16, 18, 20, 22, 133
___John Preston___________________________ Safety Comes First ENGINES Starting techniques injury asso ciated sport model airplanes frequently reported laceration caused contact rotating propeller Judging mail seems likely time mod elers will contact turning prop during en gine starting/tuning operation models engine equipped throttle case installations Free Flight Control Line models have no alternative flip prop expect engine scream full bore minute fires However greatest number AMA members fly radio-controlled models en gines models equipped throt tle So full-throttle starts can beand opinion should beavoided Therefore some surprise read some engine-starting instructions sent Peter Jacobitz modeler East Boston MA instructions contained fol lowing note carbureted engines throt tle valve should wide open during engine starting letter Peter asked correct invitation disaster give en gines manufacturer fair due instructions did also state Make sure holding airplane firmly prevent suddenly lurch ing forward engine starts other words followed engine-starting directions disaster should averted However curious learn whether particular engine required wide-open throt tie order start easily wrote man ufacturer response received another instruction sheet particular engine manufacturer proposed changes starting instructions will read follows 1 booster battery disconnected turn needle valve counterclockwise two turns fully closed position 2 throttle wide open place fin gertip over carburetor inlet flip propel ler quickly two times prime engine 3 Remove fingertip carburetor inlet close throttle fast idle setting flip propeller quickly two three times booster battery still disconnected NOTE Make sure holding airplane firmly prevent lurching forward engine starts After starts maintain hold until have reduced throttle lowidle setting 4 Connect booster battery clip glow plug 5 Slowly turn propeller counterclock wise feel momentary resistance indicates ignltion mixture cyl inder 6 Quickly flip propeller start en gine disconnect booster battery much prefer starting instructions both Wanted Reliable bud dies buddy system Sailplane towlines deserve re spect Safe enginestarting procedures safety experience ease start ing case Im boring experienced modelers let throw anecdote true story incident occurred few years ago nearby airport pilot full-scale aircraft flipped prop engines throttle wide open aircraft DeHavilland Tiger Moth flies barnstorming-type air show Sunday during summer airfield Vir ginla Its owner experiencing engine starting problems several weeks would frequently become flooded during operation solution flooding problem ro tate propeller through several revolutions hand Tiger Moth has no starter e b throttle wide open day inci dent owner friend arrived late air field airplane hangared luck would have engine didnt want start became flooded owners friend front cockpit instructed open throttle Im sure whether also told turn off magneto ignition switches Anyway owner pulled prop through compression engine burst life aircraft proceeded accelerate down taxiway between two rows hangars Editors note Unless liger Moth modified no wheel brakesthe plane relies drag tail skid slow down under normal circumstances RMcM told own ers friend airline pilot either familiar Tiger Moths just plain reacted too late result aircraft became airborne hit dirt embankment end taxiway However flight short-lived because struck some telephone wires other side embankment ended up its nose field Fortunately no body injuredjust plane story about heard after inci dent happened because British Continued page 16 /I 7 II AND ThEN TI-IE PROP FLEW OFF OF TWE 4STROKE AND WOULD vtU 6ELIEVE mAr 0L LIG44TNIN& LARRY HERE ACTUALLY CAU14T THE SUCKER 14 Model Aviation column provided address items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily represent official position Academy Model Aeronautics ATTENTION AMA MEMBERS THE ALL NEW 11th EDITION Radio Control Buyers Guide IS HOT OFF THE PRESS Hobbyistts Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1 495 $1195 i $300 postage/handling RADIO CONTROL BUYERS GUIDE Clifton House ton VA 22024 may use VISA MasterCard citarpe payment sending card number expiration date order DGA Designs OS DGA. DCA Designs 0 0 0 It1 o5 S 0 SPORT BIPE QUARTER SCALE PLANS QuarterMaster Sport Ripe $21 Quadra 35.73Spafl.E-Z build. Great Flyer.SSe,,tutAcailacle.. DAViS 0-1K 905Spar. 0 Quadra 35 power similar. PPO 1933 KINNER SPORTSTER Model K.llrSpan 035 power FF0 s25 4-CYCLE PROJECTS t ts&E AKRON FUNK VS Scale SC span 60 Size 4 cycle. Fantastic Flyppo s21 ________0 S DlK603 Span.I C 45 4 cycle similar. caD S.j Two Inch scale Sixth scale $1933 KINNER SPORTSTER** 4 Model K. 78 Span. lt1-75.4cyPco5lO C** Photo -educed t-On 14 Scale plane. OTwo scat SlatS seal ________0 tdce OS PlanS coming Scale Piano t PHOTO DOCUMENTATION PACKS aoai table- 0 ALL PLANS ROLLEDSHIPPED UPS Complete wlnstructe, Booklet Send 5100 Catalog New York State SesOentS add 7% sales tax. Send check MO s. Allow 3 weeks tOr check clear S plane throttie works opposite direction conventional US planes just because assisted Tiger Moths owner starting another occasion prior accident What reversed British aircraft such Tiger Moth action engines magneto switches Up Off down Fur thermore mag switches Tiger Moth instrument panel US lightplanes mounted exterior fu selage left ofand betweenthe cockpits Its guess owners friend either familiar up-Off/down-On convention txtag switches didnt know located end story happier note Tiger repairable its owner still flying Sunday air shows overhauled engine now starts easily Before leaving subject engine-starting juries Id like repeat suggestion previ ously made April 1987 column reminded article Buddy Box newsletter Cloud Busters club California Under title Safety Notes editor Jacklast name known reported cident club member got arm arc 18-in prop being turned Big Banger Apparently no holding plane time incident because throt tle half-open plane started move engine came life Its owner instinctively moved hand stop model sustained arm lacerations required 100 stitches se cure As possible way avert such incidents future editor Buddy Box suggested Continued page 18 INTRODUCING NEW COLD WEATHER FRIEND YOU CAN COUNT ON TRANZMITTEN 0 Simple yet very effective 0 Keeps out wind cold o Will restrict hand motions 0 Made USA AMA modeler Fits Tx-Sturdy construct opolyoster filled nylon quilting oCotton jersey lining lD label 0Velcro closuresfastsure fit 0Choose RedBlue Brt Orange AMA patch included yourswell sewone free NO POSTAL HANDLING FEE send patchcolor choice SKYHI ENTERPRISE 422E 20th AVE COLUMBUS OHIO 43201 SATISFACTION GUARANTEED 16 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30I 1/16233 3/32240 1/8 243 3/16249 1/4 258 1/32337 1/20337 1/163374931 3/32 3445837 1/8 3547145 3/163828255 1/4 3739561 5/16385 3/8 3 88 124 71 1/2 3 110 155 3/4 3 165 1/1845876 48 3/3247084 56 1/9 4 85 106 66 3/164 93 122 75 1/4 4110 13484 3/6 4 165 225 1/2 4 225 261 MATCHED SHEETS 42 3/324100 1/84108 3/164120 1/44131 BALSA STICKS 3S4 1/16 1/409 1/16 3/610 1/16 1/214 3/32 1/410 3/32 3/912 3/32 1/216 1/8 1/606 1/9 1/411 1/8 3/812 1/8 1/216 3/163/1011 3/16 3/617 3/16 1/222 14 1/416 1/4 3/819 1/4 1/221 1/4 3/434 1/4 140 5/165/1621 3/8 3/827 3/6 1/232 3/8 3/442 36 152 1/2 1/236 12 3/446 1/2 150 5/6 5/646 3/4 3/467 BALSA HOT LINE Call 806 7456394 10 ant -6pm Central Time LONE STAR MODELS 1623 57th St Lubbock TX 79412 3I iwj~rwLIGHT4-6 LB BALSA TRIANGLES 36WOOD36 4 4251/32349 36 38301/20349 2 2391/16349 34 34453/32358 551/8367 63/16376 8BALSA PLANKS361/4395 24853/83115 62501/23139 32003/43220 301429613300 2411/232751/16479 2611/243603/32491 30222251/84100 44233253/164117 244351/44138 28334953/94207 37346881/24292 46 65TAPERED SHEETS36 1/4265TRAILING EDGE36 531/43951/4132 623/82685/1611/439 3/83963/81 1/246 1/231201/2270 LONE STAR EPOXY 0 oz111845 5,,588 1511/IT588 30 nli598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa BASSWOOD 3/16 3/16 3/181/4 3/163/8 3/16 1/2 3/163/4 1/4 1/4 1/4 3/8 1/43/4 3/83/8 3/6 1/2 3/8 3/4 1/2 1/2 1/2 3/4 4 26 39 39 46 50 42 49 88 80 70 90 90 100 BUNDLEDEALS 201/6338695 201/164361020 203/32336841 153/32439955 151/8336715 101/8439675 153/16338900 103/18436810 101/4339630 101/4439890 103/8336650 5-3/8436629 51/2334540 INSTANT CLUE 51/2436855 1 o TS6 296 103/32448845 1 sThi 299 51/8446495 2eTSAk 550 53/16448985 2, rs 550 51/4446625 2 PINE STICKS 36 4 1/81/81317 1/61/41623 1/83/82027 3183/161724 3/16 3/92332 3/161/23040 1/4142637 1/43/93042 1/41/23447 3/6 3/83752 SPRUCESTICKS 36 4 1/8 1/815 1/8 1/41824 1/8 3/82039 3/163/162534 1/4 1/43145 1/4 3/83650 3/9 3/84583 3/8 1/25570 1/2 1/28086 12 3/48888 SPRUCE TRiANGLES 3/83/8 1/2 1/2 3/4 3/4 34651 11 77 HARD MAPLE 1/4 3/6 3/8 3/9 3/8 1/2 3/9 3/4 1/23/4 BIRCH DOWELS 1/8 3/16 1/4 5/16 3/8 18 40 45 50 58 58 36 00 11 14 25 32 3PLYBIRCN4 1/6412525 1/3212425 1/1812435 1/812450 SPLYBIRCH4 3/3212570 1/812585 3/1812595 1/412600 GROOVED LG. MOUNTS 82 lecheR LaTE PLY43/83/411/8/40 1/861503/83/4/5/32/40 1/8123881/23/4/3/18/45 Handling ChargeS300 pay UPS Add $200 COD $300 extra PP APO FPO accept Visa Master Card personal checks COD 4-118% ta Teas US currency Mnmam Order $1000 PILOT GLASSES Safety Products Modelers Modelers Sunglasses ANSI Z871 approved safety glasses Rts over prescription glasses Extremely light weight additional comfort Free-flow ventilation system temples Wrap around side protection Anti-fog Anti-ultraviolet radiation Available clear gray mirror case included Clear $1095Gray $1195 Mirror $1495 CYA Mask 5 1BC Halon Fire Extinguisher $1495 Shipping handling add $275 Visa Mastercard accepted NO CODs Send cashiers check money order Safety Plus _________PO Box 1173 FLU5924-9640 cmlton MS members try use airplane-restraining device much possible included cop ies photographs three such devices featured April 1987 Safety col umn Yes means item lug out flying field some designs also serve re straining devices prevent model taxi ing around back van station wagon during journey suggest consider such device dont already have Hi-start hazard isnt propellers can cause injuries modelers hands letter Joshua Fiero East Lyme CT points out hi-startprobably commonly used Sailplane launching devicecan also bite un wary Editors note unfamiliar hi-start launching device consists con siderable lengthperhaps 100 ft thickwalled rubber surgical tubing attached end stake driven ground other end lengthperhaps 400 ft monofilament braided nylon line free end line attached towhook Sailplane flier pulls plane back consid erable distance stretch rubber tube re leases noodel flight force rubber tube returning its unstretched length im parts sufficient force tow model aloft after end towline falls free towhook RMcM Joshua described incident follows Several weeks ago Gentle Lady Sailplane using hi-start-type launch device being pre pared flight pilots assistant too fansil iar RC flying assisting operation helping bring tension nylon launch line Continued page 20 00 E~ri wM 64 503 2 75 25ygtCe0201/419132714542613001/006 3005 CaLina PsySa12397842 19C,L1s 004 N625990-9* 17F55, 07 FEc1492110 310ay1a G,se117178351807 2 7032 13SapernaE1eo 165157228441660 24 8035 36 0a1fhAk1472102316 ICALP161 35t,/ EE,La #11271841208240Lck 6155 430,e AvengBe 3sF301440169032F,d JAl465 425, 0170 Ft. FetSt327735Ba 81705 38NA t4t1ch011 825362655290A 925 34Oacci0ao6011403157239516/1 14 626 37Car Navy 003011992811057200te T1 2506, 83014251816193349Oadlylaae 34t/aag Traesp 120-342327135 Dc-S 33CaeL HawS 0-611511223140776 4 32Da11Lt1, 05811121210114372449 3617440 315, P45364 612915142216452660 3919059 32lpetld 8110,,13492010402053L3d 6043 328waed i6&MI1e1071563116 6245 34Tse, S04 95,13719839165 301 7035 3500w 51 561118,1692310472062 3519445 33Be t26A Law 510014 1121 12 42 2453 361 8440 35SlIn,a 351 1872017308621691 24j12230 4250 t4,tait 8-e37194122014210052.N 37Oleac, P517169241104928 43N 915 Wldaw 6613332491359960 30TAXI Owl, T,a13141 7 211 9 43 19/~I 5032 42008204 6etldtve253037357455 26F,d 34151 443932573611465 31Bellanca Ale B322048249640/ 330aea 22 OaaS*14 18 29 25 50 oI 755 27C Sabawk F7C115122314472663 4 26115 AepSIb 0-3836255428104 144Pge 0-400 5eb50327535 31Llndy L01rt,211131112632N 3/1/4 10 F1aL146261037"201" 318aM Race Pet,IO158301660-3 31C Dpaehwl F902121121914392930530 76SI 31BeeSeg FCC F45315142216452660 39 905 38TeIers Feeca Ip12191910372049 35 744 29La1ng 02 AapS231213524705293 69 READ BEFORE ORDRRING1* * 3/9 SCALE /1/33 9118/ PLANI* Mini,a, 04 51988AVAILARLE ATONE DOLLAC * 81 SURE TO ADD 141 USUAL*OND8R 188 1/3 SCALE /0% FOR PACKAGING POST - * PRICES FOR ALL DESIGNS 1* AGO AND INSUEANCE.A800T IHOISAND ADDITIONAL PLANS MANY 5/165S Ia 13650 375 CATALOG $200 09 PRICE LIST ALONE 9/ FREE lE FOREIGN bC CAN & MEO/ 03___g /2/6/ 6El~O Model 8 DETROIT AVSNaE CLEVEtAWO OHIO 44102 18 Model Aviation 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 DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm and 930 pm EST Mon & Wed DAVIS DiESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 pilot backing up almost ready hand-launch assistant fore warned about possibility taken un awares holding tension nylon line bare hand nylon line broke para chute attachment point near plane assistant sustained hand injuries consist ing burn-cut groove across three four fingers Amazingly no bleeding drop blood being medic would guess fast-moving nylon line auto matically cauterized cut due extremely high temperature generated its friction cut through tissues lack bleeding cut estimated up %-in deep probably blessing Think simple cut nice newX-Acto other hobby knife blade bleeds slips finger can recall incident experienced number years ago could have simi lar results time Graupner Cirrus Sailplane frequently launched histart occasion pulling nylon line back launch site local recreational area sawn-off VW appeared field some off-road cavorting Despite shouted warnings its driver went straight nylon line hi-start needless say dropped like hot potato seen VW approaching too might have fingers cau terized severed Whether use histart winch launch Sailplane treat line extreme caution respect Four-stroke backfire solution recent letter Duke Iden described yet another incident prop thrown four-stroke engine resulted trip hospital Dukes letter Continued page 22 1/6 scale fully poseable 12 action pilots dressed in-removable fabric flight gear time No painting assembly required WWI & Civilian weigh 6 oz WWII pilot has removable Parachute Mae West weighs 8 oz Add $325 per figure P&H Calif res add sales tax Allow 10 days delivery Note Pilots can also fly 1/5 scale ships Send Check money order MGA Enterprises PO Box 626 Dept Fresno Calif 93709 20 Model Aviation F mga pilots 1 N1ORE POWEii WITH LESS NOISE four-cycle measuring up expectations read IAVEY YSTEMS Performance Quiet Clean Electric Power THE HERONBILL WINTERS SENSATIONAL HERON NEW SPORT/COMPETITION DESIGN FOR 05/ 075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE COMBINES NEW SPECIAL AIRFOIL AND LIFTING STABILATOR FOR GREAT PER FORMANCE 65 SPAN 545 SQ AREA AND 440Z LUCIFERAIWO METER EASY TO BUILD AND FLY SAILPLANE FOR THE NOVICE OR COMPETITOR USING THE POPULAR PROPHET SERIES MODIFIED E-193 AIRFOIL DESIGNED FOR 05/075 ELECTRIC MOTORS DIRECT OR GEARED DRIVE CAN ALSO BE FLOWN WITH 15 COBALT MOTORS OR 049 ENGINES 78 SPAN 600 SQ AREA AND 40 OZ ALL DAVEY SYSTEMS ELECTRIC KITS ARE NOW AVAILABLE WITH THE NEW 075 HYPERTHRUST MOTOR AND SWITCH HARNESS ON THE MOTOR SWITCH HARNESS AND GEAR REDUCER MOTOR/HARNESS MOTOR/HARNESS/GEARS follows also describes solution _________________________________________ problem Talk about timing Ive just returned hospital after getting seven stitches right index fingerthe use start engines As lying bed wonderful wife brought September issue Model Avia tion started article headline jumped right out uddy system could save life Four-stroke engines still throw props Boy Talk about timely journalism Heres story started five weeks Id rebuilding scratch-built -scale Tay loreraft Sid Morgan plans plane got new radio 48-size four-cycle engine inverted installation using 15%-nitro fuel 12-6 prop did use electric starter start several timesbut made certain really tighten nut hand-starting engine half-throttle setting per instructions Suddenly engine fired prop flew off towards inflicted deep cut finger hit lip Im glad wasnt . Meanwhile finger bleeding like sieve Now wonderful wife buddy sys tem clubs field like others real close help injuries serious nature could present problem solo flier Earlier morning loading van Sue asked would like go has always very understanding backs hobby lucky am said Sure several minutes ready go T-Crafts maiden flight bit ner vous As can see darned good thing wife came because time Continued page 133 22 Model Aviation TRIM KNIFE * -M vrnI RAVEY675 TOWER LANE YSTEMSWEST CHESTER PA 19380 oRPORATION Trim Knife designed precisely edge trim excess cover ing material model Can used outside edges straight curved Blade can set ftom 1/16 1/4 mith simple adjustmest screm Trim Knife mill make perfect overlap butt seams Works cover rg materials 6 blades Trim Knife Set includes B blades Trim Knife Blades 5 per pack 1987 NATIONAL CHAMPION Tony Frackowiak shown winning FAI RC Pattern 1987 NATS original design LENGE IV CHALLENGE IV available basic kit featuring epoxyglass fuselage foam wings stab $14995 Deluxe Kit $35000 much assem bly complete exceptionally smooth pre cise flying aircraft equally adept AMA FAI pattern Much individual preference can accomodated including choice Tn-Gear Tail Dragger 790 sq wing 820 sq depending desired flight speed C\Soe\C $8je ~ ietractS9 GO& par1terSs a0d atpiP~3 ~oyS oriented public relations better way us go Martin Dilly West Wickham Kent England can t think anyone wouldn t like see high respect airplane mod eling general public unfortunate ly doesnt seem magic answers assure giant leap di rection Safety/Preston Continued page 22 accident no else field Just two minutes before accident two other members left leaving just two us accident happened grabbed torn finger Sue helped load van drove nearby fire station para medic gave preliminary check said going live bound up wound off went hospital After receiving seven stitches finger several days later returned field T-Craft did again time prop flew off hit leg no hospital trip time made deep cut After lengthy dis cussion club president engine expert Frank Warren electronics expert Ron Roeder bought zero-to-five-ohm wirewound rheostat could handle 25 amps found local surplus outlet $150 also picked up toggle switch 50 cents lit tle fellows went power panel field box Since Ive no problems Frank Ron contended glow plug getting too much juice causing detonation problem loosening prop nut causing insurance company shudder would recommend addition anyone firing up four-stroke toggle switch works kill-switch glow plug can cut heat quickly havent personally tried out Dukes sugges tion However worked him may work others Meanwhile wonder engine manufacturers going provide some means positively retain prop nut shaft column has discussed several methods have suggested readers its ex actly new technology wrap up months column letter Joe Wagner New Wilmington PA points out buddy system infallible Ill let Joe tell tale Im responding latest column Sep tember 87 mentioning buddy tystem good bit model flying alone although Ive never problems agree its better have buddy along However make sure youve got dependable An experience back 1942 case point building solid Scale models friend basement big knife using roughly shape Short Stirling fuse lage slipped made huge gash hand Blood everywhere before could pick up rag slow flow turned buddy help saw him collapsed heap floor learned later despite Boy Scout training merit badges First Aid friend people simply can stand sight blood did know Bleeding hand managed carry friend upstairs alone house lay him down couch make sure breathing OK before left made way doctors office circumstances Id have better off alone now wonder about some peo ple occasionally fly would react case bloody accident Maybe ought ask themtactfully course Have another safe month John Preston 2812 Northampton St N W Washington DC 20015 TR-260/Shepherd Continued page 34 Select some grain 3/ sheet tur fledeck sides cut little oversize Wet outside sheet will curve over formers stringers easily use CyA glue attach Sand top sheets flush formers top stringers glue -in light sheet top Cut excess off sides A-in sheet sand top long straight block Glue landing gear plate place epoxy Glue bottom A-in sheet place December 1987 133 U Letters Editor Continued page 12