Watch out Propel lers Transmitter pow er switches Servo-re versing switches left wrong position Re ceiver connectors poor contact Children flying field BEWARE props picture worth thousand words Unfortunately dont have pictures months Safety co lumn However photo appeared October 1989 showing Bob McMul lens hand after repaired 59 stitches resulted number letters readers Several people said Bobs accident has convinced thit isnt wise fly alone Yet still get letters others continue take task preaching safety message Bill Hawks people Bill recently flying 20-yearold grandson too became victim fingers-in-the-prop syndrome stated letter look knew next stop would hospital emer gency room stitches After acci dent Bills grandson disassemble two large models brought fly ing field load station wagon also open combination lock gate field relock gate after driving through As Bill reported alone would have very unhandy tear down planes store everything wagon hassle combination pad lock steel gate addition flying alone Bill says will use plastic props since lieves sharp plastic prop might well have cut finger completely off also wears leather glove left hand holds model feels hand likely come contact prop solution securing model safely starting engine use some type model-holding device have topic discussion previous Safety col umns number market However very simple device can easily make yourself de scribed joint letter Lon Muehlen beck Mike Cribbins Lon Mike Birch Run MI letter prompted description Bob McMullens injuries contained Pol aroid pictures device However dont think would reproduce very well magazine Ill just describe device fabricated length 14 -in-diameter steel rod bent shape horseshoe inverted U similar croquet hoop two legs spaced about five six inches apart cen tral portion covered rubber tubing -in automotive vacuum hose use place two legs over rear fuse lage front horizontal stab push ground assuming grass pit area make devices can either bend 14-in rod vise wrap around metal clothesline pole Lon Mike both have such model-holding devices frequently loan other modelers Another prop incident described Sidney Sharp Hanford CA modeler Sid ney sent copy letter wrote mail order retailer explaining returning parts could find 14 x 6 plastic prop installed YS-1 20 four-stroke engine running full throttle 8000-10000 rpm both blades let loose Fortunately Sid injured workbench now has hole Sid modified prop other remove sharp flash ing leading trailing edges blades bore hub fit shaft 8mm think YS-l 20 engine Suppose injury victim brought lawsuit recover cost treatment Would fact mount ing hole prop hub enlarged have exonerated props manufacturer blame much can enlarge hole prop before compromise strength hub dont have swers questions seems props both wood plastic should have sufficient meat hub area en sure adequate strength bored out fit onto largest shaft engine dis placement prop intended Its since Ive reports Continued page 16 14 Model Aviation John Preston Safety812 Comes First Northampton St NW Washington DC 20015 column i provided address Items concern regarding safety aspects model aviation actIvities Content column however opinion author does necessailly represent official posItion Academy Model Aeronautics --I S EQ 0 0 W WIAT DI ttLtR P4fljE AND 1LLIA AO4T P1141*4 ACI4ND 14E ALt4EV . ttU MLC*IT 4UT YOURBLVE/ Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose e Radio installation e Straight wing building e Installing hinges OShear webbing e Applying FG cloth eSerno installation e Setting up new radio e Built-up tail surfaces o Slab tail surlaces e Aileron installation CRFflIT CAR Fuel tank installation eNew engine setup e Fuselage construction eBUILDING STRAIGHT e Installing pustrods eCovering film e Eliminating warps e Aligning Balancing e Final checkout ePLUS MUCH MORE! .uoiuInIcno Use toll tree number place order Have j74 MasterCard VISA ready call OR mail $24g5 S & H TO MasterCardPLANE VIDEO PO Box 23128 Des Moines IA 50322 Iowa residents add 4% sales tax 0 Kr 18003838251 props being kicked off shafts fourstroke engines Maybe modelers now able adjust mixture prevent backfires perhaps people using locknuts such engines letter Eloy Marez service manager Futaba Corporation imports YS 120 four-stroke engine enclosed copy por tion engines instructions shows comes double locknuts safety Eloy states best knowledge has completely elim inated prop-kicking problem Eloys letter also drew attention ads model-size gas turbine engines have begun appear modeling press Will use such engines present special safety problems did note subject turbojet safety raised July 14 AMA Executive Council meeting AMA Safety Committee has asked develop operating criteria acceptability safety standards see page 117 November 1989 issue magazine contemplating use gas tur bine engine near future might want contact member Safety Committee see what have mind Back propellers Bill Spathias mod eler since 1948 resides Dallas TX sent letter describing incident frankly admits should qualify him SOY Sap Year award Bills tale woe goes like Continued page 18 Geared $ 9771 Geared $ltO46 Geared $12749 Geared $16145 Geared $t8696 Geared $31671 $8296 $5500 $3200 $5996 $3196 ASTRO FLIGHT SYSTEMS Cballenger Cobat 4 cell 020 Direct $ 7645 Challenger CabOt 5 cell 035 Direct 9 8920 ChallengerCabat7 cell 09 Direct $lte21 Challenger Cobalt l2cet 15 Direct $14020 Csallenger CabOt 14 cell 25 Direct $16570 Csallenger Cobalt 118 cell 40 Direct $19545 CtallengerCobat 24 cell 61 Direct $28471 Astro DC/DC Onper Charger up 1028 culls Astro AC/DC Csarger carrent 04051 Astro DC/DC Csarger Astro Electric Threttle Anlro On-OS Molar Control Electronic AQQH Anderson Pacer Pole Connector 4 Esasings / 4 pins $200 / yr Gold Pin Malen Connector$210 /pr Tarniya Connector$150/pr Hi-Plea Wire39 ea redo Slack 16 Gai240 Strand$200 Daveys 30 Ans Metert$1999 Micro Swech Harneost$450 3/16 Plat Braid tar Soldering Batteries$050/S Heat Shrink Tobing Pot Banenes 29 tar 4SOAR 900012000CR P101 PaCks 3 tsr 800AR Plat Packs 4 tar OOOAR 012000CR Stacked Packs SANYO CIJTOPF RATTERV PACKS $190/fl $180/fl $109 /9 * t & CELLS 4 Cell 4SOmA$1990 9 Cell 490rmA $2300 490AR $3SOea 6 Cell 500mA$2920 7Cell 600 InS 93319 OOSAR $39tea 6 Cell 900 rrsA $2980 7 Cell 900 InS $3389 900SCR $dSSea 6 Cell l200mA $2920 7 Cell l200nnA $3210 12000CR$3Stea packs wired 1101 packs 1 Please specity desired connectors ELECTRIC POWER KITS MMC Utra MIt IV 88 Span Sailplane tar 05 Gear$3796 MMC Electric Playboy 67 Span Old Timer tsr 00 Gear$2600 Astro Challenger 73 Span Sailplane tarts Gear$3250 EMD Electra Glue II 73 Span Sailplane torso$3100 EMD Themlic Traveler Sailplane 76 Span tar 09$3100 EMD Sky Knight 44 Span Trainer torsO$2400 EMD Lightning 39 Span Aerobatic Span Model tar 09$2400 MMC Past Eddie Aerobatic Spas Model tortS$2400 Astro Soya 37 Sean Aerobatic Snee Model tsr 05$2400 SHIPPINO & IIANOLINO76POgcCATALOOUS Up $800 add$200$200 pp/lot Class froc $9Ot t5 $2000 add$290whrn rrqacstcd ordcr $2001 $4900 add$329 $4501 $7000 add$379 Over $7000 add$450HOBBY HORN CA Addressees 0406% tao Send 3 Moran St [A] MO VISA/ MC 50 Eap Date OBOX 2212 Check allow opts30 days tarWestmnoter Ca 92684 check clearance COD Enact charges plan $190 823-8311 handling Cash OnlyHrs MDP-Fr SAM 5PM 16 Model Aviation MAUL MbIMU HULdI 1/4 SCALE 98 PIPER SUPER CUBCORBEN SUPER ACE 1/4 SCALE 1071/4 SCALE 80 NEWHObbY Horn ~VHS-4 HOUR FORMAT y pe \t~V tape youve waiting isfinallyherell youre new hobby just want learn secret wood plane construction YOU PLANE VIDEO Presents BuILDING IT RIGHT THE FIRST TIME FIRST NO-NONSENSE VIDEO OF WOOD AIRCRAFT CONSTRUCTION APPROX 4 HOURS ON e A3A BALSA SHEETS 36 45 30 118233 332240 18 o243 316249 14 256 132337 1 20337 1 1833748 31 3323445837 18354 71 45 318362 82 55 143738561 518385110 38 388124 71 123110155 343165181 118458 7648 332470 9458 1848010888 318493122 75 14 4110134 84 38 4165225138 12 4225281 MATCHED SHEETS42 3324100 194108 3164120 144131 BALSA SliCKS 3648 1161408 1163810 1161214 332 1410 332 3812 3321216 18 1808 18141118 18 381218 18121024 3183161118 316 381720 316 122230 14 141624 14 381926 4122130 14 343444 14 14055 5165162128 38 382737 38 123248 38 344255 38 15270 12123853 12344682 12 15878 58 584885 34 346790 *1 BALSA TRIANGLES 36 25 8830 35 345 55 BALSA PLANKS36 85 50 06 14zOO 1123275 1124360 22225 23325 24435 33485 34688 TAPERED SHEETS36 142 85 14385 38288 38398 123120 LONE STAR EPOXY 9orLSt-8 95 5r0598 15,,598 30oo598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 46 LB WOOD36 132353 120353 116353 32363 18377 316389 143104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 364236 124322 TRAILING EDGE 36 14132 51611439 3811246 12270 INSTANT DL UE 1, Tlrck296 1 oo Oh,298j 20 05ck550 20 18,550 must try 46 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 1/8 1/81725 16 142026 18 382232 3163162838 14 143450 14 384055 14 0124585 38 3/84869 381/26077 1/2 128868 1234 75 97 SPRUCE TRIANGLES 3/83/8 1212 34 34 LITE PL V 48 1/8x6 1/8 x 12 1/46 114 x 12 BASSWOOD48 31631626 3181430 3183838 3161248 3163460 141442 143649 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 201/16336899 201164361035 20332 336885 15-3/32 438955 151/8338735 1018438895 153163036920 10316436835 1014336855 1014438830 1038336870 536436859 5112336540 51/24361080 10-3/32 0448885 518446500 5316 00 514448645 HARD MAPLE 1 4 38 3838 38 12 3834 1234 18 40 45 50 56 68 BIRCHOOWELS36 18 09 31611 1414 51625 3832 3PLYEIRCII 48 1164x12835 1I32x12475 1I16x12475 11812495 5 PLY3iRCH48 313212700 1I8x12775 363/16x12625 47114x12625 64318x12725 8111212900 GROOVEDLGMtiUNTS 12 Inches 3/834/1 8/40 3/834/532/40 1234/316/45 175 350 275 550 LONE STAR MODELS cant Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 states Weaccept \Pisa MasterCard personal checks coo 65 % tax Texas US currencyonly Minimum Wood Order $1000 working son s hot Fox 50 wanted run short burst dry out storage shop vise handy thought would use hold engine going short run snugged engine vise between two pieces pine primed flipped prop As usual started first try wound up like B-29 garage took off out vise like wings thing actually flew two short feet between vise stomach straight arrow saw slow mo tion just like movies no time move cut causing three lacerations took eight stitches close Luckily wife home staggered house thought shot Thats bad looked blood everywhere luck completely bad day because prior starting engine noticed fiberglass propeller sharp knife Through force habit sanded edges smooth shudder think bad would have done hope will help keep other mod elers trying stunt Transmitter power switches Another topic October 89 column drew some mail story about crash Bob Bingamans Flying Quaker due transmitter being inadvertently Continued page 20 ota timer perfectly proportioned modeling Curtiss Robin 049 EngInes -Channel R/C 41 WIngspan ElectrIc Power Optional o oa Very leon lu/I scale aircraft ideally suited model flight s appealing old curt/os Robin born spruce linen age beautil,lly proportioned tar rubber electric glow engines Easy fun build tralnerlike perfarnance Flyline Models caleb8 508 PhOne 170312736693 FLYLINE MODELS INC 7PO Boa 2136 Pslrfax VIrgInIa 22031 LiSA TO YOUR LOCAL WIMT7I~ HOBBY SHOP GUN7 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE Cell 006 745 6394 10am 6pm Central Time BLUES CA getting down get protected CA mask Safety Plus mask will eliminate CA fumes epoxy polyester resin vapors air breath Lightweight easy breathing comfortable CA Mask $1595 Paint Mask $2045 See hobby dealer first doesnt have what need order direct Safety Plus PO Box 1173 Dept 12M Clinton Mississippi 39056 Call toll free 1-800-842-7233 Mississippi dial 601-924-9640 VISA MASTERCARD accepted COD add $250 shipping handling included Dealer Inquiries Invited PLU5 18 Model Aviation bust completely finished authentically detailed poseable 1/8 scale Ifl 90 unirprmxaas 12091224-4170 p 0 box 5631trosno Co 93755 turned off Bob mistook on/off switch Airtronics Vanguard transmit ter throttle trim lever asked modelers send thoughts design transmitter switches letter re sponding request came North Dakota modeler Frank Cudworth re ported similar experience Futaba 5UAP PCM trans mitter Another letter subject Mrs An drea Belk Sac ramento CA has solution problem have Vanguard transmitter An drea wrote Septem ber 89 issue Model Builder magazine product review Vanguard PCM radio author Stu Rich mond addresses problem ac cidental shutoff points out special feature radio transmit ter on/off switch actuator front ra dio can re moved reveal recessed switch transmitter case external actuator switch may left off user chooses thus preventing ac cidentally switch ing off transmit ter Mr Richmond spoke Cliff Weirick Airtron ics Cliff pointed out fea ture Van guard transmitter Perhaps fea ture available other models well isnt should Maybe can research get ball rolling response Andreas suggestion get ball rolling ask radio manu facturer/importer may read col umn give some serious consideration type location transmitter on/off switches currently being used prod uct Could transmitter inadvertently turned off due mistaking its on/off switch trim lever change its de sign and/or location Connectors Another letter also mentioned transmitter switch problem zeroed problem servo bat tery pack connectors Bjorn Hammarskjold will shortly returnlntrodudng Zap Zap-a-Gap Quarter Pounders Four ounces worlds finest adhesives suggested retail price $1895 Available now better hobby stores everywhere House Balsa House Balsa 20130 State Road Cerritos California 90701 213 860-1276 toboit Frank Tlano Enterprises Robart 2460 SW 85th Terrace 310 North 5th Street Davie Florida 33324St Charles lllinola 60174 305 473-2211 5847616 Manufactured Pacer rechnology Rancho Cucamonga CA contact has problems looked cause found contacts corrodedthis after /2 years too much use remedy problem now have parallel receiver contacts added male 15-pin D-sub connector model have soldered servos fe male 15-pin D sub connector connectors gold plated dont corrode means change re ceiver plane have disconnect just polarized plug always know have servos cor rectly connected exactly first installed re ceiver plane have used sys tem some years back Sweden works fine always make sure preflight check ensure wires con nected importance preflight check has dis cussed previous Safety columns However following tale Granby MA modeler Doug Macbrien points out have pay attention perform such check 'On Saturday night rigging up another model use same transmitter use favor ite Giant use aileron servo-reversing switch tired finished forgot put ing Sweden native country after aswitch back its normal position two-year stay US postdoctoralThe next morning took Giant modstudent biochemistry Bjorn reported theel field went through hurried following problem solutionpreflight check wiggled sticks did dont always get signal thenot observe whether controls moved servos plug servo contacts receiver Sometimes batteryContinued page 22 20 Model Aviation ZP QUARTER POUNDERS correct direction Immediately after takeoff model started turn left tried correct turned steep ly immediately realized what Id done youve never tried fly model reversed ailerons wont able ap preciate difficult skill ac quired over 10 years RC modeling didnt bit good like being novice first flight Within about 30 seconds rolled model done split S crashed full throttle bush es Luckily no parked cars cause earlyand shudder think what might have happened spectators 'With transmitters out servo-reversing switches vital check controls proper di rection before flight agree both Bjorn Doug Al ways perform preflight check before takeoff ensure correct control function Also will see next letter al ways check trim levers transmit ter time retrieve im pound area Children flying field obvious reasons will see writer next account will remain anonymous As avid RCer years wife would like admit Ive seen problem develop club think needs addressed opinion would appreciated con cerns might take note act accordingly see column national magazine club belong has exis tence about five years has few members have kids toddler age group However member partic ular allows kids roam free around flight line pit area members wife often accompanies him flying field kids sit pay no tention safety annoyance other members roam around totally unsupervised occasion member physically pick up youngest child seat child mother tell mother didnt come out fly ing field babysit another occasion children picked up transmitter changed set ting several trim levers might guess surprise awaiting its owner next takeoff Apparently someone must have com plained club member father kids club officer cause recent meeting got up soapbox declared felt kids safer flight line side anywhere else field nobody said anything response statement dont believe everyone $999$749$729$689$599$150 $1152$864$841$772$691$212 ________ $1288$965$939$862$772$266 _______ $1372$1029$1002$919$823$301 _______ $1459$1094$1065$977$876$336 _______ RED MAX RACING FUEL Trophy winner planes boats & cars two boat blends castor ok up 40% nitro RED MAX20$1775$1332$1296$1190$1065 $464 REDMAX2S$1965$1474$1435$1317$1179 $541 RED MAX4O$2539$1905$1894$1701$1524 $774 RED MAX 50$2922$2192$2133$1958$1753 $929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 6593497$2622$2552$2343$209891162 RED MAX 4-CYCLE FUEL Eliminates detonation & kickback 4-cycle engines smoother Idle & power 10-4 CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1166 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1165 $1060 $950$386 RED MAX PERFORMANCE FUEL High flash point heavy oil use tuned pipes ducted fan & other heavy dty app $ Performance$1200$900$876$804$720_____ 10 Performance $1391$1043$1016$922$835_______ iSPerlormance $1583 $1187 $1155 $1060 $950_______ RED MAX PATTERN FUEL Proven best fuel pettsrn engines using pumps tuned pipes 5 Pattern$1198$ 895 $ 870 $ 795 $695________ 10 Pattern$1375$1035 $1009 $ 925 $825_______ iSPattern$1575 $1175 $1145 $1050 $940_______ SUPER TIGER 3000 FUEL Beet fuel Super Tiger 2000-4000 engines .......SuperTiger3000 $1288 $965 $939 $862 $772 RED MAX DIESEL FUEL Superior diesel back list popular demand customers Ball Bearings91767 $1326 $1260 $11 84 $1050________ DieedFlaiiBesings$1867$1426$1360$1294$1160 $225 _________ $299 _________ $375 ________ $266 Power easy starting power Smooth take off s power intricate maneuvers Red MaX makes engine come alive power performance never expected can have power Its phone call away Power today next week next year Red Maxs secret gredients keep engine last ing longer running power fully other 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics other fuel 22 Model Aviation Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL IN OTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free pit gals No hand ling charge Freight collect drums Deduct 3% prepay Mix ply Total pW deter mines price SC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD COD add $2 per cartoni Personal checks may held until cleared OTYFUEL1 GAL 4 GAL 24 GAL 60 GAL 120 Gal ordered MIXTURE RUMAMT RED MAX PREMIUM FUELGAL TOTAL $ fuel beginners ft sport flyers should use Avail synthetic castor blend RED MAX 0 RED MAX S RED MAX 10 RED MAX 12 RED MAX 15 RED MAX FUEL Continued page 135 $231 _________ $309 ___ $396___ Grand Total SMOKER FLUID beat smoker fluid 2 4 cycle engines Smoker Fluid$1265 $965 $939 $862 $772$261 CUSTOM BLENDED FUEL INGRDIENTS Available type engine use Cell price Mm gallon boats-cars-hellcopterssoeedoetternscala/ scaiskavan-ianieirinsntMi PLEASE PRINT BOX STRE FT CITY TATF 71P CARD TYPE AND NO EXPIRAl NI TE SR Battery Packs Make Clean Sweep 89 KRC Electric Fly! Saturday Sunday September 16 17 10th annual KRC Electric Fly held Quakertown PA year two different types endurance events held Saturday Sunday Although weather miserable Saturday up last down event held 12 contestants participated four top finishers using SR packs First place won using SR 1250 Series Magnum pack second place won using SR 1250 Series Magnum pack third place won using SR 1800 Series Magnum pack fourth place won using SR 900 Series Max pack Sunday weather much better different type endurance event held Instead simply longest possible flight contestant made series 4 minute flights 2 minute period between flights retrieve planes allowed recharge change battery packs between flights contestant logged highest number 4 minute flights plus number seconds last flight won objective minimize affect thermals outcome event again SR Battery packs made clean sweep event First place won using SR 1250 Series Magnum pack second place won using SR 1000 Series Max pack third place won using SR 1250 Series Magnum pack As can see comes Electric Power battery packs SR Packs cant beat Two years ago SR recognized need series cells designed exclusively electric flier new series would have give electric fliers longest possible motor runs lowest possible weight new SR Magnum Series cells outgrowth research development Magnum Series cells pack 40% 50% capacity cell increasing its size weight Magnum cells primarily designed Sport applications maximum current load 12 15 amps intermittent applications SRs EP Max Pack Cells other hand designed lowest possible internal impedance could handle extremely high current loads continuous discharge rates 15 30 amps SR Max Pack cells best choice rather Magnum cells addition Electric Flight battery packs SR now Stop source Electric Flight supplies SR now stocks motors props chargers wire connectors switches just about anything else might need Electric Flight addition everyone SR will too happy answer questions help solve problems might have place order ask question can reach us calling Hotline 516-286-0079 between 9am 5pm Monday through Friday youd like us send literature send self addressed business size envelope 50 cents postage SR Batteries Inc Box 287 Bellport NY 11713 -ADVERTISEMENTSafety/Preston Continued page 22 agreed way thinking Back May 1980 Safety column published list flying field rules compiled rules differ ent clubs list contained 43 different rules intention clubs should select believed applied operations list did ad dress pets Rule #39 Pets shall con fined spectator area did specifically address kids However two rules applying adults seem equally appropriate kids Rule #11 Spectators welcome must remain designated area lieve should also apply young chil dren unless escorted parent club member gnated area spectators does include pit area flight line Rule #21 Pilots must stand marked pilots box Only pilots instruc tors spottersare permitted stand pilots box dont believe children toddler age likely qualified pi lots instructors spotters other words dont believe toddlers should permitted flight line So now have opinion right ful place children flying field However please dont misunderstand am very much favor hobby being family affair possible Bring kids flying field means own protection please dont let roam around unsupervised As column points out month accidents hap pen Lets have victims children encourage anyone wishing express different viewpoint concerning issue write Meanwhile lets have safe month Skyvolt/Kopski Continued page 34 ter repinning place add hard /16 x -in leading edge strip top ai leron bottom sheets shown Making sure strip perpendicular surface easily done small blocks pictured spread thin CyA along joint Take care glue blocks process Lightly run felt-tip marking pen over top edge leading edge strip color Using small sanding block tape covering corner edge carefi1ly sand away darkened top edge leading edge strip As maneuver tape-covered corner block bottom sheet-TE joint color disappears youll know leading edge top edge tapered proper angle Its important oversand very front edge strip must remain /4 high Y6 building sur face Fill root end of aileron ta Continued page 138 IA ES MILLS METALS BOOKS PRECISION INSTRUMENTS COMPLETE CATALOG $2 00 1 OUls 0, 4VPDIU FULl Cl S 2100 M So Road Spo oqt old Oh o 45505 mpa 322 8562 January 1990 135 THE WIREMASTER o bender/coder extra large handle bends 118-114 coils 5/ 32-3116 music wire Wire creep eliminated ANTI-KREEP WIRE LOCIV free catalog has hundreds new items free miCro bender offer JCM COMPANY 114 Washington Ter. Waukegan IL 60085 IS* WE BUILD YOUR HELl TEST YOUR HELl YOUR HELl I1- Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION
Edition: Model Aviation - 1990/01
Page Numbers: 14, 16, 18, 20, 22, 135
Watch out Propel lers Transmitter pow er switches Servo-re versing switches left wrong position Re ceiver connectors poor contact Children flying field BEWARE props picture worth thousand words Unfortunately dont have pictures months Safety co lumn However photo appeared October 1989 showing Bob McMul lens hand after repaired 59 stitches resulted number letters readers Several people said Bobs accident has convinced thit isnt wise fly alone Yet still get letters others continue take task preaching safety message Bill Hawks people Bill recently flying 20-yearold grandson too became victim fingers-in-the-prop syndrome stated letter look knew next stop would hospital emer gency room stitches After acci dent Bills grandson disassemble two large models brought fly ing field load station wagon also open combination lock gate field relock gate after driving through As Bill reported alone would have very unhandy tear down planes store everything wagon hassle combination pad lock steel gate addition flying alone Bill says will use plastic props since lieves sharp plastic prop might well have cut finger completely off also wears leather glove left hand holds model feels hand likely come contact prop solution securing model safely starting engine use some type model-holding device have topic discussion previous Safety col umns number market However very simple device can easily make yourself de scribed joint letter Lon Muehlen beck Mike Cribbins Lon Mike Birch Run MI letter prompted description Bob McMullens injuries contained Pol aroid pictures device However dont think would reproduce very well magazine Ill just describe device fabricated length 14 -in-diameter steel rod bent shape horseshoe inverted U similar croquet hoop two legs spaced about five six inches apart cen tral portion covered rubber tubing -in automotive vacuum hose use place two legs over rear fuse lage front horizontal stab push ground assuming grass pit area make devices can either bend 14-in rod vise wrap around metal clothesline pole Lon Mike both have such model-holding devices frequently loan other modelers Another prop incident described Sidney Sharp Hanford CA modeler Sid ney sent copy letter wrote mail order retailer explaining returning parts could find 14 x 6 plastic prop installed YS-1 20 four-stroke engine running full throttle 8000-10000 rpm both blades let loose Fortunately Sid injured workbench now has hole Sid modified prop other remove sharp flash ing leading trailing edges blades bore hub fit shaft 8mm think YS-l 20 engine Suppose injury victim brought lawsuit recover cost treatment Would fact mount ing hole prop hub enlarged have exonerated props manufacturer blame much can enlarge hole prop before compromise strength hub dont have swers questions seems props both wood plastic should have sufficient meat hub area en sure adequate strength bored out fit onto largest shaft engine dis placement prop intended Its since Ive reports Continued page 16 14 Model Aviation John Preston Safety812 Comes First Northampton St NW Washington DC 20015 column i provided address Items concern regarding safety aspects model aviation actIvities Content column however opinion author does necessailly represent official posItion Academy Model Aeronautics --I S EQ 0 0 W WIAT DI ttLtR P4fljE AND 1LLIA AO4T P1141*4 ACI4ND 14E ALt4EV . ttU MLC*IT 4UT YOURBLVE/ Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose e Radio installation e Straight wing building e Installing hinges OShear webbing e Applying FG cloth eSerno installation e Setting up new radio e Built-up tail surfaces o Slab tail surlaces e Aileron installation CRFflIT CAR Fuel tank installation eNew engine setup e Fuselage construction eBUILDING STRAIGHT e Installing pustrods eCovering film e Eliminating warps e Aligning Balancing e Final checkout ePLUS MUCH MORE! .uoiuInIcno Use toll tree number place order Have j74 MasterCard VISA ready call OR mail $24g5 S & H TO MasterCardPLANE VIDEO PO Box 23128 Des Moines IA 50322 Iowa residents add 4% sales tax 0 Kr 18003838251 props being kicked off shafts fourstroke engines Maybe modelers now able adjust mixture prevent backfires perhaps people using locknuts such engines letter Eloy Marez service manager Futaba Corporation imports YS 120 four-stroke engine enclosed copy por tion engines instructions shows comes double locknuts safety Eloy states best knowledge has completely elim inated prop-kicking problem Eloys letter also drew attention ads model-size gas turbine engines have begun appear modeling press Will use such engines present special safety problems did note subject turbojet safety raised July 14 AMA Executive Council meeting AMA Safety Committee has asked develop operating criteria acceptability safety standards see page 117 November 1989 issue magazine contemplating use gas tur bine engine near future might want contact member Safety Committee see what have mind Back propellers Bill Spathias mod eler since 1948 resides Dallas TX sent letter describing incident frankly admits should qualify him SOY Sap Year award Bills tale woe goes like Continued page 18 Geared $ 9771 Geared $ltO46 Geared $12749 Geared $16145 Geared $t8696 Geared $31671 $8296 $5500 $3200 $5996 $3196 ASTRO FLIGHT SYSTEMS Cballenger Cobat 4 cell 020 Direct $ 7645 Challenger CabOt 5 cell 035 Direct 9 8920 ChallengerCabat7 cell 09 Direct $lte21 Challenger Cobalt l2cet 15 Direct $14020 Csallenger CabOt 14 cell 25 Direct $16570 Csallenger Cobalt 118 cell 40 Direct $19545 CtallengerCobat 24 cell 61 Direct $28471 Astro DC/DC Onper Charger up 1028 culls Astro AC/DC Csarger carrent 04051 Astro DC/DC Csarger Astro Electric Threttle Anlro On-OS Molar Control Electronic AQQH Anderson Pacer Pole Connector 4 Esasings / 4 pins $200 / yr Gold Pin Malen Connector$210 /pr Tarniya Connector$150/pr Hi-Plea Wire39 ea redo Slack 16 Gai240 Strand$200 Daveys 30 Ans Metert$1999 Micro Swech Harneost$450 3/16 Plat Braid tar Soldering Batteries$050/S Heat Shrink Tobing Pot Banenes 29 tar 4SOAR 900012000CR P101 PaCks 3 tsr 800AR Plat Packs 4 tar OOOAR 012000CR Stacked Packs SANYO CIJTOPF RATTERV PACKS $190/fl $180/fl $109 /9 * t & CELLS 4 Cell 4SOmA$1990 9 Cell 490rmA $2300 490AR $3SOea 6 Cell 500mA$2920 7Cell 600 InS 93319 OOSAR $39tea 6 Cell 900 rrsA $2980 7 Cell 900 InS $3389 900SCR $dSSea 6 Cell l200mA $2920 7 Cell l200nnA $3210 12000CR$3Stea packs wired 1101 packs 1 Please specity desired connectors ELECTRIC POWER KITS MMC Utra MIt IV 88 Span Sailplane tar 05 Gear$3796 MMC Electric Playboy 67 Span Old Timer tsr 00 Gear$2600 Astro Challenger 73 Span Sailplane tarts Gear$3250 EMD Electra Glue II 73 Span Sailplane torso$3100 EMD Themlic Traveler Sailplane 76 Span tar 09$3100 EMD Sky Knight 44 Span Trainer torsO$2400 EMD Lightning 39 Span Aerobatic Span Model tar 09$2400 MMC Past Eddie Aerobatic Spas Model tortS$2400 Astro Soya 37 Sean Aerobatic Snee Model tsr 05$2400 SHIPPINO & IIANOLINO76POgcCATALOOUS Up $800 add$200$200 pp/lot Class froc $9Ot t5 $2000 add$290whrn rrqacstcd ordcr $2001 $4900 add$329 $4501 $7000 add$379 Over $7000 add$450HOBBY HORN CA Addressees 0406% tao Send 3 Moran St [A] MO VISA/ MC 50 Eap Date OBOX 2212 Check allow opts30 days tarWestmnoter Ca 92684 check clearance COD Enact charges plan $190 823-8311 handling Cash OnlyHrs MDP-Fr SAM 5PM 16 Model Aviation MAUL MbIMU HULdI 1/4 SCALE 98 PIPER SUPER CUBCORBEN SUPER ACE 1/4 SCALE 1071/4 SCALE 80 NEWHObbY Horn ~VHS-4 HOUR FORMAT y pe \t~V tape youve waiting isfinallyherell youre new hobby just want learn secret wood plane construction YOU PLANE VIDEO Presents BuILDING IT RIGHT THE FIRST TIME FIRST NO-NONSENSE VIDEO OF WOOD AIRCRAFT CONSTRUCTION APPROX 4 HOURS ON e A3A BALSA SHEETS 36 45 30 118233 332240 18 o243 316249 14 256 132337 1 20337 1 1833748 31 3323445837 18354 71 45 318362 82 55 143738561 518385110 38 388124 71 123110155 343165181 118458 7648 332470 9458 1848010888 318493122 75 14 4110134 84 38 4165225138 12 4225281 MATCHED SHEETS42 3324100 194108 3164120 144131 BALSA SliCKS 3648 1161408 1163810 1161214 332 1410 332 3812 3321216 18 1808 18141118 18 381218 18121024 3183161118 316 381720 316 122230 14 141624 14 381926 4122130 14 343444 14 14055 5165162128 38 382737 38 123248 38 344255 38 15270 12123853 12344682 12 15878 58 584885 34 346790 *1 BALSA TRIANGLES 36 25 8830 35 345 55 BALSA PLANKS36 85 50 06 14zOO 1123275 1124360 22225 23325 24435 33485 34688 TAPERED SHEETS36 142 85 14385 38288 38398 123120 LONE STAR EPOXY 9orLSt-8 95 5r0598 15,,598 30oo598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 46 LB WOOD36 132353 120353 116353 32363 18377 316389 143104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 364236 124322 TRAILING EDGE 36 14132 51611439 3811246 12270 INSTANT DL UE 1, Tlrck296 1 oo Oh,298j 20 05ck550 20 18,550 must try 46 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 1/8 1/81725 16 142026 18 382232 3163162838 14 143450 14 384055 14 0124585 38 3/84869 381/26077 1/2 128868 1234 75 97 SPRUCE TRIANGLES 3/83/8 1212 34 34 LITE PL V 48 1/8x6 1/8 x 12 1/46 114 x 12 BASSWOOD48 31631626 3181430 3183838 3161248 3163460 141442 143649 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 201/16336899 201164361035 20332 336885 15-3/32 438955 151/8338735 1018438895 153163036920 10316436835 1014336855 1014438830 1038336870 536436859 5112336540 51/24361080 10-3/32 0448885 518446500 5316 00 514448645 HARD MAPLE 1 4 38 3838 38 12 3834 1234 18 40 45 50 56 68 BIRCHOOWELS36 18 09 31611 1414 51625 3832 3PLYEIRCII 48 1164x12835 1I32x12475 1I16x12475 11812495 5 PLY3iRCH48 313212700 1I8x12775 363/16x12625 47114x12625 64318x12725 8111212900 GROOVEDLGMtiUNTS 12 Inches 3/834/1 8/40 3/834/532/40 1234/316/45 175 350 275 550 LONE STAR MODELS cant Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 states Weaccept \Pisa MasterCard personal checks coo 65 % tax Texas US currencyonly Minimum Wood Order $1000 working son s hot Fox 50 wanted run short burst dry out storage shop vise handy thought would use hold engine going short run snugged engine vise between two pieces pine primed flipped prop As usual started first try wound up like B-29 garage took off out vise like wings thing actually flew two short feet between vise stomach straight arrow saw slow mo tion just like movies no time move cut causing three lacerations took eight stitches close Luckily wife home staggered house thought shot Thats bad looked blood everywhere luck completely bad day because prior starting engine noticed fiberglass propeller sharp knife Through force habit sanded edges smooth shudder think bad would have done hope will help keep other mod elers trying stunt Transmitter power switches Another topic October 89 column drew some mail story about crash Bob Bingamans Flying Quaker due transmitter being inadvertently Continued page 20 ota timer perfectly proportioned modeling Curtiss Robin 049 EngInes -Channel R/C 41 WIngspan ElectrIc Power Optional o oa Very leon lu/I scale aircraft ideally suited model flight s appealing old curt/os Robin born spruce linen age beautil,lly proportioned tar rubber electric glow engines Easy fun build tralnerlike perfarnance Flyline Models caleb8 508 PhOne 170312736693 FLYLINE MODELS INC 7PO Boa 2136 Pslrfax VIrgInIa 22031 LiSA TO YOUR LOCAL WIMT7I~ HOBBY SHOP GUN7 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE Cell 006 745 6394 10am 6pm Central Time BLUES CA getting down get protected CA mask Safety Plus mask will eliminate CA fumes epoxy polyester resin vapors air breath Lightweight easy breathing comfortable CA Mask $1595 Paint Mask $2045 See hobby dealer first doesnt have what need order direct Safety Plus PO Box 1173 Dept 12M Clinton Mississippi 39056 Call toll free 1-800-842-7233 Mississippi dial 601-924-9640 VISA MASTERCARD accepted COD add $250 shipping handling included Dealer Inquiries Invited PLU5 18 Model Aviation bust completely finished authentically detailed poseable 1/8 scale Ifl 90 unirprmxaas 12091224-4170 p 0 box 5631trosno Co 93755 turned off Bob mistook on/off switch Airtronics Vanguard transmit ter throttle trim lever asked modelers send thoughts design transmitter switches letter re sponding request came North Dakota modeler Frank Cudworth re ported similar experience Futaba 5UAP PCM trans mitter Another letter subject Mrs An drea Belk Sac ramento CA has solution problem have Vanguard transmitter An drea wrote Septem ber 89 issue Model Builder magazine product review Vanguard PCM radio author Stu Rich mond addresses problem ac cidental shutoff points out special feature radio transmit ter on/off switch actuator front ra dio can re moved reveal recessed switch transmitter case external actuator switch may left off user chooses thus preventing ac cidentally switch ing off transmit ter Mr Richmond spoke Cliff Weirick Airtron ics Cliff pointed out fea ture Van guard transmitter Perhaps fea ture available other models well isnt should Maybe can research get ball rolling response Andreas suggestion get ball rolling ask radio manu facturer/importer may read col umn give some serious consideration type location transmitter on/off switches currently being used prod uct Could transmitter inadvertently turned off due mistaking its on/off switch trim lever change its de sign and/or location Connectors Another letter also mentioned transmitter switch problem zeroed problem servo bat tery pack connectors Bjorn Hammarskjold will shortly returnlntrodudng Zap Zap-a-Gap Quarter Pounders Four ounces worlds finest adhesives suggested retail price $1895 Available now better hobby stores everywhere House Balsa House Balsa 20130 State Road Cerritos California 90701 213 860-1276 toboit Frank Tlano Enterprises Robart 2460 SW 85th Terrace 310 North 5th Street Davie Florida 33324St Charles lllinola 60174 305 473-2211 5847616 Manufactured Pacer rechnology Rancho Cucamonga CA contact has problems looked cause found contacts corrodedthis after /2 years too much use remedy problem now have parallel receiver contacts added male 15-pin D-sub connector model have soldered servos fe male 15-pin D sub connector connectors gold plated dont corrode means change re ceiver plane have disconnect just polarized plug always know have servos cor rectly connected exactly first installed re ceiver plane have used sys tem some years back Sweden works fine always make sure preflight check ensure wires con nected importance preflight check has dis cussed previous Safety columns However following tale Granby MA modeler Doug Macbrien points out have pay attention perform such check 'On Saturday night rigging up another model use same transmitter use favor ite Giant use aileron servo-reversing switch tired finished forgot put ing Sweden native country after aswitch back its normal position two-year stay US postdoctoralThe next morning took Giant modstudent biochemistry Bjorn reported theel field went through hurried following problem solutionpreflight check wiggled sticks did dont always get signal thenot observe whether controls moved servos plug servo contacts receiver Sometimes batteryContinued page 22 20 Model Aviation ZP QUARTER POUNDERS correct direction Immediately after takeoff model started turn left tried correct turned steep ly immediately realized what Id done youve never tried fly model reversed ailerons wont able ap preciate difficult skill ac quired over 10 years RC modeling didnt bit good like being novice first flight Within about 30 seconds rolled model done split S crashed full throttle bush es Luckily no parked cars cause earlyand shudder think what might have happened spectators 'With transmitters out servo-reversing switches vital check controls proper di rection before flight agree both Bjorn Doug Al ways perform preflight check before takeoff ensure correct control function Also will see next letter al ways check trim levers transmit ter time retrieve im pound area Children flying field obvious reasons will see writer next account will remain anonymous As avid RCer years wife would like admit Ive seen problem develop club think needs addressed opinion would appreciated con cerns might take note act accordingly see column national magazine club belong has exis tence about five years has few members have kids toddler age group However member partic ular allows kids roam free around flight line pit area members wife often accompanies him flying field kids sit pay no tention safety annoyance other members roam around totally unsupervised occasion member physically pick up youngest child seat child mother tell mother didnt come out fly ing field babysit another occasion children picked up transmitter changed set ting several trim levers might guess surprise awaiting its owner next takeoff Apparently someone must have com plained club member father kids club officer cause recent meeting got up soapbox declared felt kids safer flight line side anywhere else field nobody said anything response statement dont believe everyone $999$749$729$689$599$150 $1152$864$841$772$691$212 ________ $1288$965$939$862$772$266 _______ $1372$1029$1002$919$823$301 _______ $1459$1094$1065$977$876$336 _______ RED MAX RACING FUEL Trophy winner planes boats & cars two boat blends castor ok up 40% nitro RED MAX20$1775$1332$1296$1190$1065 $464 REDMAX2S$1965$1474$1435$1317$1179 $541 RED MAX4O$2539$1905$1894$1701$1524 $774 RED MAX 50$2922$2192$2133$1958$1753 $929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 6593497$2622$2552$2343$209891162 RED MAX 4-CYCLE FUEL Eliminates detonation & kickback 4-cycle engines smoother Idle & power 10-4 CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1166 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1165 $1060 $950$386 RED MAX PERFORMANCE FUEL High flash point heavy oil use tuned pipes ducted fan & other heavy dty app $ Performance$1200$900$876$804$720_____ 10 Performance $1391$1043$1016$922$835_______ iSPerlormance $1583 $1187 $1155 $1060 $950_______ RED MAX PATTERN FUEL Proven best fuel pettsrn engines using pumps tuned pipes 5 Pattern$1198$ 895 $ 870 $ 795 $695________ 10 Pattern$1375$1035 $1009 $ 925 $825_______ iSPattern$1575 $1175 $1145 $1050 $940_______ SUPER TIGER 3000 FUEL Beet fuel Super Tiger 2000-4000 engines .......SuperTiger3000 $1288 $965 $939 $862 $772 RED MAX DIESEL FUEL Superior diesel back list popular demand customers Ball Bearings91767 $1326 $1260 $11 84 $1050________ DieedFlaiiBesings$1867$1426$1360$1294$1160 $225 _________ $299 _________ $375 ________ $266 Power easy starting power Smooth take off s power intricate maneuvers Red MaX makes engine come alive power performance never expected can have power Its phone call away Power today next week next year Red Maxs secret gredients keep engine last ing longer running power fully other 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics other fuel 22 Model Aviation Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL IN OTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free pit gals No hand ling charge Freight collect drums Deduct 3% prepay Mix ply Total pW deter mines price SC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD COD add $2 per cartoni Personal checks may held until cleared OTYFUEL1 GAL 4 GAL 24 GAL 60 GAL 120 Gal ordered MIXTURE RUMAMT RED MAX PREMIUM FUELGAL TOTAL $ fuel beginners ft sport flyers should use Avail synthetic castor blend RED MAX 0 RED MAX S RED MAX 10 RED MAX 12 RED MAX 15 RED MAX FUEL Continued page 135 $231 _________ $309 ___ $396___ Grand Total SMOKER FLUID beat smoker fluid 2 4 cycle engines Smoker Fluid$1265 $965 $939 $862 $772$261 CUSTOM BLENDED FUEL INGRDIENTS Available type engine use Cell price Mm gallon boats-cars-hellcopterssoeedoetternscala/ scaiskavan-ianieirinsntMi PLEASE PRINT BOX STRE FT CITY TATF 71P CARD TYPE AND NO EXPIRAl NI TE SR Battery Packs Make Clean Sweep 89 KRC Electric Fly! Saturday Sunday September 16 17 10th annual KRC Electric Fly held Quakertown PA year two different types endurance events held Saturday Sunday Although weather miserable Saturday up last down event held 12 contestants participated four top finishers using SR packs First place won using SR 1250 Series Magnum pack second place won using SR 1250 Series Magnum pack third place won using SR 1800 Series Magnum pack fourth place won using SR 900 Series Max pack Sunday weather much better different type endurance event held Instead simply longest possible flight contestant made series 4 minute flights 2 minute period between flights retrieve planes allowed recharge change battery packs between flights contestant logged highest number 4 minute flights plus number seconds last flight won objective minimize affect thermals outcome event again SR Battery packs made clean sweep event First place won using SR 1250 Series Magnum pack second place won using SR 1000 Series Max pack third place won using SR 1250 Series Magnum pack As can see comes Electric Power battery packs SR Packs cant beat Two years ago SR recognized need series cells designed exclusively electric flier new series would have give electric fliers longest possible motor runs lowest possible weight new SR Magnum Series cells outgrowth research development Magnum Series cells pack 40% 50% capacity cell increasing its size weight Magnum cells primarily designed Sport applications maximum current load 12 15 amps intermittent applications SRs EP Max Pack Cells other hand designed lowest possible internal impedance could handle extremely high current loads continuous discharge rates 15 30 amps SR Max Pack cells best choice rather Magnum cells addition Electric Flight battery packs SR now Stop source Electric Flight supplies SR now stocks motors props chargers wire connectors switches just about anything else might need Electric Flight addition everyone SR will too happy answer questions help solve problems might have place order ask question can reach us calling Hotline 516-286-0079 between 9am 5pm Monday through Friday youd like us send literature send self addressed business size envelope 50 cents postage SR Batteries Inc Box 287 Bellport NY 11713 -ADVERTISEMENTSafety/Preston Continued page 22 agreed way thinking Back May 1980 Safety column published list flying field rules compiled rules differ ent clubs list contained 43 different rules intention clubs should select believed applied operations list did ad dress pets Rule #39 Pets shall con fined spectator area did specifically address kids However two rules applying adults seem equally appropriate kids Rule #11 Spectators welcome must remain designated area lieve should also apply young chil dren unless escorted parent club member gnated area spectators does include pit area flight line Rule #21 Pilots must stand marked pilots box Only pilots instruc tors spottersare permitted stand pilots box dont believe children toddler age likely qualified pi lots instructors spotters other words dont believe toddlers should permitted flight line So now have opinion right ful place children flying field However please dont misunderstand am very much favor hobby being family affair possible Bring kids flying field means own protection please dont let roam around unsupervised As column points out month accidents hap pen Lets have victims children encourage anyone wishing express different viewpoint concerning issue write Meanwhile lets have safe month Skyvolt/Kopski Continued page 34 ter repinning place add hard /16 x -in leading edge strip top ai leron bottom sheets shown Making sure strip perpendicular surface easily done small blocks pictured spread thin CyA along joint Take care glue blocks process Lightly run felt-tip marking pen over top edge leading edge strip color Using small sanding block tape covering corner edge carefi1ly sand away darkened top edge leading edge strip As maneuver tape-covered corner block bottom sheet-TE joint color disappears youll know leading edge top edge tapered proper angle Its important oversand very front edge strip must remain /4 high Y6 building sur face Fill root end of aileron ta Continued page 138 IA ES MILLS METALS BOOKS PRECISION INSTRUMENTS COMPLETE CATALOG $2 00 1 OUls 0, 4VPDIU FULl Cl S 2100 M So Road Spo oqt old Oh o 45505 mpa 322 8562 January 1990 135 THE WIREMASTER o bender/coder extra large handle bends 118-114 coils 5/ 32-3116 music wire Wire creep eliminated ANTI-KREEP WIRE LOCIV free catalog has hundreds new items free miCro bender offer JCM COMPANY 114 Washington Ter. Waukegan IL 60085 IS* WE BUILD YOUR HELl TEST YOUR HELl YOUR HELl I1- Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION
Edition: Model Aviation - 1990/01
Page Numbers: 14, 16, 18, 20, 22, 135
Watch out Propel lers Transmitter pow er switches Servo-re versing switches left wrong position Re ceiver connectors poor contact Children flying field BEWARE props picture worth thousand words Unfortunately dont have pictures months Safety co lumn However photo appeared October 1989 showing Bob McMul lens hand after repaired 59 stitches resulted number letters readers Several people said Bobs accident has convinced thit isnt wise fly alone Yet still get letters others continue take task preaching safety message Bill Hawks people Bill recently flying 20-yearold grandson too became victim fingers-in-the-prop syndrome stated letter look knew next stop would hospital emer gency room stitches After acci dent Bills grandson disassemble two large models brought fly ing field load station wagon also open combination lock gate field relock gate after driving through As Bill reported alone would have very unhandy tear down planes store everything wagon hassle combination pad lock steel gate addition flying alone Bill says will use plastic props since lieves sharp plastic prop might well have cut finger completely off also wears leather glove left hand holds model feels hand likely come contact prop solution securing model safely starting engine use some type model-holding device have topic discussion previous Safety col umns number market However very simple device can easily make yourself de scribed joint letter Lon Muehlen beck Mike Cribbins Lon Mike Birch Run MI letter prompted description Bob McMullens injuries contained Pol aroid pictures device However dont think would reproduce very well magazine Ill just describe device fabricated length 14 -in-diameter steel rod bent shape horseshoe inverted U similar croquet hoop two legs spaced about five six inches apart cen tral portion covered rubber tubing -in automotive vacuum hose use place two legs over rear fuse lage front horizontal stab push ground assuming grass pit area make devices can either bend 14-in rod vise wrap around metal clothesline pole Lon Mike both have such model-holding devices frequently loan other modelers Another prop incident described Sidney Sharp Hanford CA modeler Sid ney sent copy letter wrote mail order retailer explaining returning parts could find 14 x 6 plastic prop installed YS-1 20 four-stroke engine running full throttle 8000-10000 rpm both blades let loose Fortunately Sid injured workbench now has hole Sid modified prop other remove sharp flash ing leading trailing edges blades bore hub fit shaft 8mm think YS-l 20 engine Suppose injury victim brought lawsuit recover cost treatment Would fact mount ing hole prop hub enlarged have exonerated props manufacturer blame much can enlarge hole prop before compromise strength hub dont have swers questions seems props both wood plastic should have sufficient meat hub area en sure adequate strength bored out fit onto largest shaft engine dis placement prop intended Its since Ive reports Continued page 16 14 Model Aviation John Preston Safety812 Comes First Northampton St NW Washington DC 20015 column i provided address Items concern regarding safety aspects model aviation actIvities Content column however opinion author does necessailly represent official posItion Academy Model Aeronautics --I S EQ 0 0 W WIAT DI ttLtR P4fljE AND 1LLIA AO4T P1141*4 ACI4ND 14E ALt4EV . ttU MLC*IT 4UT YOURBLVE/ Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose e Radio installation e Straight wing building e Installing hinges OShear webbing e Applying FG cloth eSerno installation e Setting up new radio e Built-up tail surfaces o Slab tail surlaces e Aileron installation CRFflIT CAR Fuel tank installation eNew engine setup e Fuselage construction eBUILDING STRAIGHT e Installing pustrods eCovering film e Eliminating warps e Aligning Balancing e Final checkout ePLUS MUCH MORE! .uoiuInIcno Use toll tree number place order Have j74 MasterCard VISA ready call OR mail $24g5 S & H TO MasterCardPLANE VIDEO PO Box 23128 Des Moines IA 50322 Iowa residents add 4% sales tax 0 Kr 18003838251 props being kicked off shafts fourstroke engines Maybe modelers now able adjust mixture prevent backfires perhaps people using locknuts such engines letter Eloy Marez service manager Futaba Corporation imports YS 120 four-stroke engine enclosed copy por tion engines instructions shows comes double locknuts safety Eloy states best knowledge has completely elim inated prop-kicking problem Eloys letter also drew attention ads model-size gas turbine engines have begun appear modeling press Will use such engines present special safety problems did note subject turbojet safety raised July 14 AMA Executive Council meeting AMA Safety Committee has asked develop operating criteria acceptability safety standards see page 117 November 1989 issue magazine contemplating use gas tur bine engine near future might want contact member Safety Committee see what have mind Back propellers Bill Spathias mod eler since 1948 resides Dallas TX sent letter describing incident frankly admits should qualify him SOY Sap Year award Bills tale woe goes like Continued page 18 Geared $ 9771 Geared $ltO46 Geared $12749 Geared $16145 Geared $t8696 Geared $31671 $8296 $5500 $3200 $5996 $3196 ASTRO FLIGHT SYSTEMS Cballenger Cobat 4 cell 020 Direct $ 7645 Challenger CabOt 5 cell 035 Direct 9 8920 ChallengerCabat7 cell 09 Direct $lte21 Challenger Cobalt l2cet 15 Direct $14020 Csallenger CabOt 14 cell 25 Direct $16570 Csallenger Cobalt 118 cell 40 Direct $19545 CtallengerCobat 24 cell 61 Direct $28471 Astro DC/DC Onper Charger up 1028 culls Astro AC/DC Csarger carrent 04051 Astro DC/DC Csarger Astro Electric Threttle Anlro On-OS Molar Control Electronic AQQH Anderson Pacer Pole Connector 4 Esasings / 4 pins $200 / yr Gold Pin Malen Connector$210 /pr Tarniya Connector$150/pr Hi-Plea Wire39 ea redo Slack 16 Gai240 Strand$200 Daveys 30 Ans Metert$1999 Micro Swech Harneost$450 3/16 Plat Braid tar Soldering Batteries$050/S Heat Shrink Tobing Pot Banenes 29 tar 4SOAR 900012000CR P101 PaCks 3 tsr 800AR Plat Packs 4 tar OOOAR 012000CR Stacked Packs SANYO CIJTOPF RATTERV PACKS $190/fl $180/fl $109 /9 * t & CELLS 4 Cell 4SOmA$1990 9 Cell 490rmA $2300 490AR $3SOea 6 Cell 500mA$2920 7Cell 600 InS 93319 OOSAR $39tea 6 Cell 900 rrsA $2980 7 Cell 900 InS $3389 900SCR $dSSea 6 Cell l200mA $2920 7 Cell l200nnA $3210 12000CR$3Stea packs wired 1101 packs 1 Please specity desired connectors ELECTRIC POWER KITS MMC Utra MIt IV 88 Span Sailplane tar 05 Gear$3796 MMC Electric Playboy 67 Span Old Timer tsr 00 Gear$2600 Astro Challenger 73 Span Sailplane tarts Gear$3250 EMD Electra Glue II 73 Span Sailplane torso$3100 EMD Themlic Traveler Sailplane 76 Span tar 09$3100 EMD Sky Knight 44 Span Trainer torsO$2400 EMD Lightning 39 Span Aerobatic Span Model tar 09$2400 MMC Past Eddie Aerobatic Spas Model tortS$2400 Astro Soya 37 Sean Aerobatic Snee Model tsr 05$2400 SHIPPINO & IIANOLINO76POgcCATALOOUS Up $800 add$200$200 pp/lot Class froc $9Ot t5 $2000 add$290whrn rrqacstcd ordcr $2001 $4900 add$329 $4501 $7000 add$379 Over $7000 add$450HOBBY HORN CA Addressees 0406% tao Send 3 Moran St [A] MO VISA/ MC 50 Eap Date OBOX 2212 Check allow opts30 days tarWestmnoter Ca 92684 check clearance COD Enact charges plan $190 823-8311 handling Cash OnlyHrs MDP-Fr SAM 5PM 16 Model Aviation MAUL MbIMU HULdI 1/4 SCALE 98 PIPER SUPER CUBCORBEN SUPER ACE 1/4 SCALE 1071/4 SCALE 80 NEWHObbY Horn ~VHS-4 HOUR FORMAT y pe \t~V tape youve waiting isfinallyherell youre new hobby just want learn secret wood plane construction YOU PLANE VIDEO Presents BuILDING IT RIGHT THE FIRST TIME FIRST NO-NONSENSE VIDEO OF WOOD AIRCRAFT CONSTRUCTION APPROX 4 HOURS ON e A3A BALSA SHEETS 36 45 30 118233 332240 18 o243 316249 14 256 132337 1 20337 1 1833748 31 3323445837 18354 71 45 318362 82 55 143738561 518385110 38 388124 71 123110155 343165181 118458 7648 332470 9458 1848010888 318493122 75 14 4110134 84 38 4165225138 12 4225281 MATCHED SHEETS42 3324100 194108 3164120 144131 BALSA SliCKS 3648 1161408 1163810 1161214 332 1410 332 3812 3321216 18 1808 18141118 18 381218 18121024 3183161118 316 381720 316 122230 14 141624 14 381926 4122130 14 343444 14 14055 5165162128 38 382737 38 123248 38 344255 38 15270 12123853 12344682 12 15878 58 584885 34 346790 *1 BALSA TRIANGLES 36 25 8830 35 345 55 BALSA PLANKS36 85 50 06 14zOO 1123275 1124360 22225 23325 24435 33485 34688 TAPERED SHEETS36 142 85 14385 38288 38398 123120 LONE STAR EPOXY 9orLSt-8 95 5r0598 15,,598 30oo598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 46 LB WOOD36 132353 120353 116353 32363 18377 316389 143104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 364236 124322 TRAILING EDGE 36 14132 51611439 3811246 12270 INSTANT DL UE 1, Tlrck296 1 oo Oh,298j 20 05ck550 20 18,550 must try 46 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 1/8 1/81725 16 142026 18 382232 3163162838 14 143450 14 384055 14 0124585 38 3/84869 381/26077 1/2 128868 1234 75 97 SPRUCE TRIANGLES 3/83/8 1212 34 34 LITE PL V 48 1/8x6 1/8 x 12 1/46 114 x 12 BASSWOOD48 31631626 3181430 3183838 3161248 3163460 141442 143649 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 201/16336899 201164361035 20332 336885 15-3/32 438955 151/8338735 1018438895 153163036920 10316436835 1014336855 1014438830 1038336870 536436859 5112336540 51/24361080 10-3/32 0448885 518446500 5316 00 514448645 HARD MAPLE 1 4 38 3838 38 12 3834 1234 18 40 45 50 56 68 BIRCHOOWELS36 18 09 31611 1414 51625 3832 3PLYEIRCII 48 1164x12835 1I32x12475 1I16x12475 11812495 5 PLY3iRCH48 313212700 1I8x12775 363/16x12625 47114x12625 64318x12725 8111212900 GROOVEDLGMtiUNTS 12 Inches 3/834/1 8/40 3/834/532/40 1234/316/45 175 350 275 550 LONE STAR MODELS cant Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 states Weaccept \Pisa MasterCard personal checks coo 65 % tax Texas US currencyonly Minimum Wood Order $1000 working son s hot Fox 50 wanted run short burst dry out storage shop vise handy thought would use hold engine going short run snugged engine vise between two pieces pine primed flipped prop As usual started first try wound up like B-29 garage took off out vise like wings thing actually flew two short feet between vise stomach straight arrow saw slow mo tion just like movies no time move cut causing three lacerations took eight stitches close Luckily wife home staggered house thought shot Thats bad looked blood everywhere luck completely bad day because prior starting engine noticed fiberglass propeller sharp knife Through force habit sanded edges smooth shudder think bad would have done hope will help keep other mod elers trying stunt Transmitter power switches Another topic October 89 column drew some mail story about crash Bob Bingamans Flying Quaker due transmitter being inadvertently Continued page 20 ota timer perfectly proportioned modeling Curtiss Robin 049 EngInes -Channel R/C 41 WIngspan ElectrIc Power Optional o oa Very leon lu/I scale aircraft ideally suited model flight s appealing old curt/os Robin born spruce linen age beautil,lly proportioned tar rubber electric glow engines Easy fun build tralnerlike perfarnance Flyline Models caleb8 508 PhOne 170312736693 FLYLINE MODELS INC 7PO Boa 2136 Pslrfax VIrgInIa 22031 LiSA TO YOUR LOCAL WIMT7I~ HOBBY SHOP GUN7 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE Cell 006 745 6394 10am 6pm Central Time BLUES CA getting down get protected CA mask Safety Plus mask will eliminate CA fumes epoxy polyester resin vapors air breath Lightweight easy breathing comfortable CA Mask $1595 Paint Mask $2045 See hobby dealer first doesnt have what need order direct Safety Plus PO Box 1173 Dept 12M Clinton Mississippi 39056 Call toll free 1-800-842-7233 Mississippi dial 601-924-9640 VISA MASTERCARD accepted COD add $250 shipping handling included Dealer Inquiries Invited PLU5 18 Model Aviation bust completely finished authentically detailed poseable 1/8 scale Ifl 90 unirprmxaas 12091224-4170 p 0 box 5631trosno Co 93755 turned off Bob mistook on/off switch Airtronics Vanguard transmit ter throttle trim lever asked modelers send thoughts design transmitter switches letter re sponding request came North Dakota modeler Frank Cudworth re ported similar experience Futaba 5UAP PCM trans mitter Another letter subject Mrs An drea Belk Sac ramento CA has solution problem have Vanguard transmitter An drea wrote Septem ber 89 issue Model Builder magazine product review Vanguard PCM radio author Stu Rich mond addresses problem ac cidental shutoff points out special feature radio transmit ter on/off switch actuator front ra dio can re moved reveal recessed switch transmitter case external actuator switch may left off user chooses thus preventing ac cidentally switch ing off transmit ter Mr Richmond spoke Cliff Weirick Airtron ics Cliff pointed out fea ture Van guard transmitter Perhaps fea ture available other models well isnt should Maybe can research get ball rolling response Andreas suggestion get ball rolling ask radio manu facturer/importer may read col umn give some serious consideration type location transmitter on/off switches currently being used prod uct Could transmitter inadvertently turned off due mistaking its on/off switch trim lever change its de sign and/or location Connectors Another letter also mentioned transmitter switch problem zeroed problem servo bat tery pack connectors Bjorn Hammarskjold will shortly returnlntrodudng Zap Zap-a-Gap Quarter Pounders Four ounces worlds finest adhesives suggested retail price $1895 Available now better hobby stores everywhere House Balsa House Balsa 20130 State Road Cerritos California 90701 213 860-1276 toboit Frank Tlano Enterprises Robart 2460 SW 85th Terrace 310 North 5th Street Davie Florida 33324St Charles lllinola 60174 305 473-2211 5847616 Manufactured Pacer rechnology Rancho Cucamonga CA contact has problems looked cause found contacts corrodedthis after /2 years too much use remedy problem now have parallel receiver contacts added male 15-pin D-sub connector model have soldered servos fe male 15-pin D sub connector connectors gold plated dont corrode means change re ceiver plane have disconnect just polarized plug always know have servos cor rectly connected exactly first installed re ceiver plane have used sys tem some years back Sweden works fine always make sure preflight check ensure wires con nected importance preflight check has dis cussed previous Safety columns However following tale Granby MA modeler Doug Macbrien points out have pay attention perform such check 'On Saturday night rigging up another model use same transmitter use favor ite Giant use aileron servo-reversing switch tired finished forgot put ing Sweden native country after aswitch back its normal position two-year stay US postdoctoralThe next morning took Giant modstudent biochemistry Bjorn reported theel field went through hurried following problem solutionpreflight check wiggled sticks did dont always get signal thenot observe whether controls moved servos plug servo contacts receiver Sometimes batteryContinued page 22 20 Model Aviation ZP QUARTER POUNDERS correct direction Immediately after takeoff model started turn left tried correct turned steep ly immediately realized what Id done youve never tried fly model reversed ailerons wont able ap preciate difficult skill ac quired over 10 years RC modeling didnt bit good like being novice first flight Within about 30 seconds rolled model done split S crashed full throttle bush es Luckily no parked cars cause earlyand shudder think what might have happened spectators 'With transmitters out servo-reversing switches vital check controls proper di rection before flight agree both Bjorn Doug Al ways perform preflight check before takeoff ensure correct control function Also will see next letter al ways check trim levers transmit ter time retrieve im pound area Children flying field obvious reasons will see writer next account will remain anonymous As avid RCer years wife would like admit Ive seen problem develop club think needs addressed opinion would appreciated con cerns might take note act accordingly see column national magazine club belong has exis tence about five years has few members have kids toddler age group However member partic ular allows kids roam free around flight line pit area members wife often accompanies him flying field kids sit pay no tention safety annoyance other members roam around totally unsupervised occasion member physically pick up youngest child seat child mother tell mother didnt come out fly ing field babysit another occasion children picked up transmitter changed set ting several trim levers might guess surprise awaiting its owner next takeoff Apparently someone must have com plained club member father kids club officer cause recent meeting got up soapbox declared felt kids safer flight line side anywhere else field nobody said anything response statement dont believe everyone $999$749$729$689$599$150 $1152$864$841$772$691$212 ________ $1288$965$939$862$772$266 _______ $1372$1029$1002$919$823$301 _______ $1459$1094$1065$977$876$336 _______ RED MAX RACING FUEL Trophy winner planes boats & cars two boat blends castor ok up 40% nitro RED MAX20$1775$1332$1296$1190$1065 $464 REDMAX2S$1965$1474$1435$1317$1179 $541 RED MAX4O$2539$1905$1894$1701$1524 $774 RED MAX 50$2922$2192$2133$1958$1753 $929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 6593497$2622$2552$2343$209891162 RED MAX 4-CYCLE FUEL Eliminates detonation & kickback 4-cycle engines smoother Idle & power 10-4 CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1166 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1165 $1060 $950$386 RED MAX PERFORMANCE FUEL High flash point heavy oil use tuned pipes ducted fan & other heavy dty app $ Performance$1200$900$876$804$720_____ 10 Performance $1391$1043$1016$922$835_______ iSPerlormance $1583 $1187 $1155 $1060 $950_______ RED MAX PATTERN FUEL Proven best fuel pettsrn engines using pumps tuned pipes 5 Pattern$1198$ 895 $ 870 $ 795 $695________ 10 Pattern$1375$1035 $1009 $ 925 $825_______ iSPattern$1575 $1175 $1145 $1050 $940_______ SUPER TIGER 3000 FUEL Beet fuel Super Tiger 2000-4000 engines .......SuperTiger3000 $1288 $965 $939 $862 $772 RED MAX DIESEL FUEL Superior diesel back list popular demand customers Ball Bearings91767 $1326 $1260 $11 84 $1050________ DieedFlaiiBesings$1867$1426$1360$1294$1160 $225 _________ $299 _________ $375 ________ $266 Power easy starting power Smooth take off s power intricate maneuvers Red MaX makes engine come alive power performance never expected can have power Its phone call away Power today next week next year Red Maxs secret gredients keep engine last ing longer running power fully other 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics other fuel 22 Model Aviation Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL IN OTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free pit gals No hand ling charge Freight collect drums Deduct 3% prepay Mix ply Total pW deter mines price SC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD COD add $2 per cartoni Personal checks may held until cleared OTYFUEL1 GAL 4 GAL 24 GAL 60 GAL 120 Gal ordered MIXTURE RUMAMT RED MAX PREMIUM FUELGAL TOTAL $ fuel beginners ft sport flyers should use Avail synthetic castor blend RED MAX 0 RED MAX S RED MAX 10 RED MAX 12 RED MAX 15 RED MAX FUEL Continued page 135 $231 _________ $309 ___ $396___ Grand Total SMOKER FLUID beat smoker fluid 2 4 cycle engines Smoker Fluid$1265 $965 $939 $862 $772$261 CUSTOM BLENDED FUEL INGRDIENTS Available type engine use Cell price Mm gallon boats-cars-hellcopterssoeedoetternscala/ scaiskavan-ianieirinsntMi PLEASE PRINT BOX STRE FT CITY TATF 71P CARD TYPE AND NO EXPIRAl NI TE SR Battery Packs Make Clean Sweep 89 KRC Electric Fly! Saturday Sunday September 16 17 10th annual KRC Electric Fly held Quakertown PA year two different types endurance events held Saturday Sunday Although weather miserable Saturday up last down event held 12 contestants participated four top finishers using SR packs First place won using SR 1250 Series Magnum pack second place won using SR 1250 Series Magnum pack third place won using SR 1800 Series Magnum pack fourth place won using SR 900 Series Max pack Sunday weather much better different type endurance event held Instead simply longest possible flight contestant made series 4 minute flights 2 minute period between flights retrieve planes allowed recharge change battery packs between flights contestant logged highest number 4 minute flights plus number seconds last flight won objective minimize affect thermals outcome event again SR Battery packs made clean sweep event First place won using SR 1250 Series Magnum pack second place won using SR 1000 Series Max pack third place won using SR 1250 Series Magnum pack As can see comes Electric Power battery packs SR Packs cant beat Two years ago SR recognized need series cells designed exclusively electric flier new series would have give electric fliers longest possible motor runs lowest possible weight new SR Magnum Series cells outgrowth research development Magnum Series cells pack 40% 50% capacity cell increasing its size weight Magnum cells primarily designed Sport applications maximum current load 12 15 amps intermittent applications SRs EP Max Pack Cells other hand designed lowest possible internal impedance could handle extremely high current loads continuous discharge rates 15 30 amps SR Max Pack cells best choice rather Magnum cells addition Electric Flight battery packs SR now Stop source Electric Flight supplies SR now stocks motors props chargers wire connectors switches just about anything else might need Electric Flight addition everyone SR will too happy answer questions help solve problems might have place order ask question can reach us calling Hotline 516-286-0079 between 9am 5pm Monday through Friday youd like us send literature send self addressed business size envelope 50 cents postage SR Batteries Inc Box 287 Bellport NY 11713 -ADVERTISEMENTSafety/Preston Continued page 22 agreed way thinking Back May 1980 Safety column published list flying field rules compiled rules differ ent clubs list contained 43 different rules intention clubs should select believed applied operations list did ad dress pets Rule #39 Pets shall con fined spectator area did specifically address kids However two rules applying adults seem equally appropriate kids Rule #11 Spectators welcome must remain designated area lieve should also apply young chil dren unless escorted parent club member gnated area spectators does include pit area flight line Rule #21 Pilots must stand marked pilots box Only pilots instruc tors spottersare permitted stand pilots box dont believe children toddler age likely qualified pi lots instructors spotters other words dont believe toddlers should permitted flight line So now have opinion right ful place children flying field However please dont misunderstand am very much favor hobby being family affair possible Bring kids flying field means own protection please dont let roam around unsupervised As column points out month accidents hap pen Lets have victims children encourage anyone wishing express different viewpoint concerning issue write Meanwhile lets have safe month Skyvolt/Kopski Continued page 34 ter repinning place add hard /16 x -in leading edge strip top ai leron bottom sheets shown Making sure strip perpendicular surface easily done small blocks pictured spread thin CyA along joint Take care glue blocks process Lightly run felt-tip marking pen over top edge leading edge strip color Using small sanding block tape covering corner edge carefi1ly sand away darkened top edge leading edge strip As maneuver tape-covered corner block bottom sheet-TE joint color disappears youll know leading edge top edge tapered proper angle Its important oversand very front edge strip must remain /4 high Y6 building sur face Fill root end of aileron ta Continued page 138 IA ES MILLS METALS BOOKS PRECISION INSTRUMENTS COMPLETE CATALOG $2 00 1 OUls 0, 4VPDIU FULl Cl S 2100 M So Road Spo oqt old Oh o 45505 mpa 322 8562 January 1990 135 THE WIREMASTER o bender/coder extra large handle bends 118-114 coils 5/ 32-3116 music wire Wire creep eliminated ANTI-KREEP WIRE LOCIV free catalog has hundreds new items free miCro bender offer JCM COMPANY 114 Washington Ter. Waukegan IL 60085 IS* WE BUILD YOUR HELl TEST YOUR HELl YOUR HELl I1- Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION
Edition: Model Aviation - 1990/01
Page Numbers: 14, 16, 18, 20, 22, 135
Watch out Propel lers Transmitter pow er switches Servo-re versing switches left wrong position Re ceiver connectors poor contact Children flying field BEWARE props picture worth thousand words Unfortunately dont have pictures months Safety co lumn However photo appeared October 1989 showing Bob McMul lens hand after repaired 59 stitches resulted number letters readers Several people said Bobs accident has convinced thit isnt wise fly alone Yet still get letters others continue take task preaching safety message Bill Hawks people Bill recently flying 20-yearold grandson too became victim fingers-in-the-prop syndrome stated letter look knew next stop would hospital emer gency room stitches After acci dent Bills grandson disassemble two large models brought fly ing field load station wagon also open combination lock gate field relock gate after driving through As Bill reported alone would have very unhandy tear down planes store everything wagon hassle combination pad lock steel gate addition flying alone Bill says will use plastic props since lieves sharp plastic prop might well have cut finger completely off also wears leather glove left hand holds model feels hand likely come contact prop solution securing model safely starting engine use some type model-holding device have topic discussion previous Safety col umns number market However very simple device can easily make yourself de scribed joint letter Lon Muehlen beck Mike Cribbins Lon Mike Birch Run MI letter prompted description Bob McMullens injuries contained Pol aroid pictures device However dont think would reproduce very well magazine Ill just describe device fabricated length 14 -in-diameter steel rod bent shape horseshoe inverted U similar croquet hoop two legs spaced about five six inches apart cen tral portion covered rubber tubing -in automotive vacuum hose use place two legs over rear fuse lage front horizontal stab push ground assuming grass pit area make devices can either bend 14-in rod vise wrap around metal clothesline pole Lon Mike both have such model-holding devices frequently loan other modelers Another prop incident described Sidney Sharp Hanford CA modeler Sid ney sent copy letter wrote mail order retailer explaining returning parts could find 14 x 6 plastic prop installed YS-1 20 four-stroke engine running full throttle 8000-10000 rpm both blades let loose Fortunately Sid injured workbench now has hole Sid modified prop other remove sharp flash ing leading trailing edges blades bore hub fit shaft 8mm think YS-l 20 engine Suppose injury victim brought lawsuit recover cost treatment Would fact mount ing hole prop hub enlarged have exonerated props manufacturer blame much can enlarge hole prop before compromise strength hub dont have swers questions seems props both wood plastic should have sufficient meat hub area en sure adequate strength bored out fit onto largest shaft engine dis placement prop intended Its since Ive reports Continued page 16 14 Model Aviation John Preston Safety812 Comes First Northampton St NW Washington DC 20015 column i provided address Items concern regarding safety aspects model aviation actIvities Content column however opinion author does necessailly represent official posItion Academy Model Aeronautics --I S EQ 0 0 W WIAT DI ttLtR P4fljE AND 1LLIA AO4T P1141*4 ACI4ND 14E ALt4EV . ttU MLC*IT 4UT YOURBLVE/ Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose e Radio installation e Straight wing building e Installing hinges OShear webbing e Applying FG cloth eSerno installation e Setting up new radio e Built-up tail surfaces o Slab tail surlaces e Aileron installation CRFflIT CAR Fuel tank installation eNew engine setup e Fuselage construction eBUILDING STRAIGHT e Installing pustrods eCovering film e Eliminating warps e Aligning Balancing e Final checkout ePLUS MUCH MORE! .uoiuInIcno Use toll tree number place order Have j74 MasterCard VISA ready call OR mail $24g5 S & H TO MasterCardPLANE VIDEO PO Box 23128 Des Moines IA 50322 Iowa residents add 4% sales tax 0 Kr 18003838251 props being kicked off shafts fourstroke engines Maybe modelers now able adjust mixture prevent backfires perhaps people using locknuts such engines letter Eloy Marez service manager Futaba Corporation imports YS 120 four-stroke engine enclosed copy por tion engines instructions shows comes double locknuts safety Eloy states best knowledge has completely elim inated prop-kicking problem Eloys letter also drew attention ads model-size gas turbine engines have begun appear modeling press Will use such engines present special safety problems did note subject turbojet safety raised July 14 AMA Executive Council meeting AMA Safety Committee has asked develop operating criteria acceptability safety standards see page 117 November 1989 issue magazine contemplating use gas tur bine engine near future might want contact member Safety Committee see what have mind Back propellers Bill Spathias mod eler since 1948 resides Dallas TX sent letter describing incident frankly admits should qualify him SOY Sap Year award Bills tale woe goes like Continued page 18 Geared $ 9771 Geared $ltO46 Geared $12749 Geared $16145 Geared $t8696 Geared $31671 $8296 $5500 $3200 $5996 $3196 ASTRO FLIGHT SYSTEMS Cballenger Cobat 4 cell 020 Direct $ 7645 Challenger CabOt 5 cell 035 Direct 9 8920 ChallengerCabat7 cell 09 Direct $lte21 Challenger Cobalt l2cet 15 Direct $14020 Csallenger CabOt 14 cell 25 Direct $16570 Csallenger Cobalt 118 cell 40 Direct $19545 CtallengerCobat 24 cell 61 Direct $28471 Astro DC/DC Onper Charger up 1028 culls Astro AC/DC Csarger carrent 04051 Astro DC/DC Csarger Astro Electric Threttle Anlro On-OS Molar Control Electronic AQQH Anderson Pacer Pole Connector 4 Esasings / 4 pins $200 / yr Gold Pin Malen Connector$210 /pr Tarniya Connector$150/pr Hi-Plea Wire39 ea redo Slack 16 Gai240 Strand$200 Daveys 30 Ans Metert$1999 Micro Swech Harneost$450 3/16 Plat Braid tar Soldering Batteries$050/S Heat Shrink Tobing Pot Banenes 29 tar 4SOAR 900012000CR P101 PaCks 3 tsr 800AR Plat Packs 4 tar OOOAR 012000CR Stacked Packs SANYO CIJTOPF RATTERV PACKS $190/fl $180/fl $109 /9 * t & CELLS 4 Cell 4SOmA$1990 9 Cell 490rmA $2300 490AR $3SOea 6 Cell 500mA$2920 7Cell 600 InS 93319 OOSAR $39tea 6 Cell 900 rrsA $2980 7 Cell 900 InS $3389 900SCR $dSSea 6 Cell l200mA $2920 7 Cell l200nnA $3210 12000CR$3Stea packs wired 1101 packs 1 Please specity desired connectors ELECTRIC POWER KITS MMC Utra MIt IV 88 Span Sailplane tar 05 Gear$3796 MMC Electric Playboy 67 Span Old Timer tsr 00 Gear$2600 Astro Challenger 73 Span Sailplane tarts Gear$3250 EMD Electra Glue II 73 Span Sailplane torso$3100 EMD Themlic Traveler Sailplane 76 Span tar 09$3100 EMD Sky Knight 44 Span Trainer torsO$2400 EMD Lightning 39 Span Aerobatic Span Model tar 09$2400 MMC Past Eddie Aerobatic Spas Model tortS$2400 Astro Soya 37 Sean Aerobatic Snee Model tsr 05$2400 SHIPPINO & IIANOLINO76POgcCATALOOUS Up $800 add$200$200 pp/lot Class froc $9Ot t5 $2000 add$290whrn rrqacstcd ordcr $2001 $4900 add$329 $4501 $7000 add$379 Over $7000 add$450HOBBY HORN CA Addressees 0406% tao Send 3 Moran St [A] MO VISA/ MC 50 Eap Date OBOX 2212 Check allow opts30 days tarWestmnoter Ca 92684 check clearance COD Enact charges plan $190 823-8311 handling Cash OnlyHrs MDP-Fr SAM 5PM 16 Model Aviation MAUL MbIMU HULdI 1/4 SCALE 98 PIPER SUPER CUBCORBEN SUPER ACE 1/4 SCALE 1071/4 SCALE 80 NEWHObbY Horn ~VHS-4 HOUR FORMAT y pe \t~V tape youve waiting isfinallyherell youre new hobby just want learn secret wood plane construction YOU PLANE VIDEO Presents BuILDING IT RIGHT THE FIRST TIME FIRST NO-NONSENSE VIDEO OF WOOD AIRCRAFT CONSTRUCTION APPROX 4 HOURS ON e A3A BALSA SHEETS 36 45 30 118233 332240 18 o243 316249 14 256 132337 1 20337 1 1833748 31 3323445837 18354 71 45 318362 82 55 143738561 518385110 38 388124 71 123110155 343165181 118458 7648 332470 9458 1848010888 318493122 75 14 4110134 84 38 4165225138 12 4225281 MATCHED SHEETS42 3324100 194108 3164120 144131 BALSA SliCKS 3648 1161408 1163810 1161214 332 1410 332 3812 3321216 18 1808 18141118 18 381218 18121024 3183161118 316 381720 316 122230 14 141624 14 381926 4122130 14 343444 14 14055 5165162128 38 382737 38 123248 38 344255 38 15270 12123853 12344682 12 15878 58 584885 34 346790 *1 BALSA TRIANGLES 36 25 8830 35 345 55 BALSA PLANKS36 85 50 06 14zOO 1123275 1124360 22225 23325 24435 33485 34688 TAPERED SHEETS36 142 85 14385 38288 38398 123120 LONE STAR EPOXY 9orLSt-8 95 5r0598 15,,598 30oo598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 46 LB WOOD36 132353 120353 116353 32363 18377 316389 143104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 364236 124322 TRAILING EDGE 36 14132 51611439 3811246 12270 INSTANT DL UE 1, Tlrck296 1 oo Oh,298j 20 05ck550 20 18,550 must try 46 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 1/8 1/81725 16 142026 18 382232 3163162838 14 143450 14 384055 14 0124585 38 3/84869 381/26077 1/2 128868 1234 75 97 SPRUCE TRIANGLES 3/83/8 1212 34 34 LITE PL V 48 1/8x6 1/8 x 12 1/46 114 x 12 BASSWOOD48 31631626 3181430 3183838 3161248 3163460 141442 143649 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 201/16336899 201164361035 20332 336885 15-3/32 438955 151/8338735 1018438895 153163036920 10316436835 1014336855 1014438830 1038336870 536436859 5112336540 51/24361080 10-3/32 0448885 518446500 5316 00 514448645 HARD MAPLE 1 4 38 3838 38 12 3834 1234 18 40 45 50 56 68 BIRCHOOWELS36 18 09 31611 1414 51625 3832 3PLYEIRCII 48 1164x12835 1I32x12475 1I16x12475 11812495 5 PLY3iRCH48 313212700 1I8x12775 363/16x12625 47114x12625 64318x12725 8111212900 GROOVEDLGMtiUNTS 12 Inches 3/834/1 8/40 3/834/532/40 1234/316/45 175 350 275 550 LONE STAR MODELS cant Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 states Weaccept \Pisa MasterCard personal checks coo 65 % tax Texas US currencyonly Minimum Wood Order $1000 working son s hot Fox 50 wanted run short burst dry out storage shop vise handy thought would use hold engine going short run snugged engine vise between two pieces pine primed flipped prop As usual started first try wound up like B-29 garage took off out vise like wings thing actually flew two short feet between vise stomach straight arrow saw slow mo tion just like movies no time move cut causing three lacerations took eight stitches close Luckily wife home staggered house thought shot Thats bad looked blood everywhere luck completely bad day because prior starting engine noticed fiberglass propeller sharp knife Through force habit sanded edges smooth shudder think bad would have done hope will help keep other mod elers trying stunt Transmitter power switches Another topic October 89 column drew some mail story about crash Bob Bingamans Flying Quaker due transmitter being inadvertently Continued page 20 ota timer perfectly proportioned modeling Curtiss Robin 049 EngInes -Channel R/C 41 WIngspan ElectrIc Power Optional o oa Very leon lu/I scale aircraft ideally suited model flight s appealing old curt/os Robin born spruce linen age beautil,lly proportioned tar rubber electric glow engines Easy fun build tralnerlike perfarnance Flyline Models caleb8 508 PhOne 170312736693 FLYLINE MODELS INC 7PO Boa 2136 Pslrfax VIrgInIa 22031 LiSA TO YOUR LOCAL WIMT7I~ HOBBY SHOP GUN7 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE Cell 006 745 6394 10am 6pm Central Time BLUES CA getting down get protected CA mask Safety Plus mask will eliminate CA fumes epoxy polyester resin vapors air breath Lightweight easy breathing comfortable CA Mask $1595 Paint Mask $2045 See hobby dealer first doesnt have what need order direct Safety Plus PO Box 1173 Dept 12M Clinton Mississippi 39056 Call toll free 1-800-842-7233 Mississippi dial 601-924-9640 VISA MASTERCARD accepted COD add $250 shipping handling included Dealer Inquiries Invited PLU5 18 Model Aviation bust completely finished authentically detailed poseable 1/8 scale Ifl 90 unirprmxaas 12091224-4170 p 0 box 5631trosno Co 93755 turned off Bob mistook on/off switch Airtronics Vanguard transmit ter throttle trim lever asked modelers send thoughts design transmitter switches letter re sponding request came North Dakota modeler Frank Cudworth re ported similar experience Futaba 5UAP PCM trans mitter Another letter subject Mrs An drea Belk Sac ramento CA has solution problem have Vanguard transmitter An drea wrote Septem ber 89 issue Model Builder magazine product review Vanguard PCM radio author Stu Rich mond addresses problem ac cidental shutoff points out special feature radio transmit ter on/off switch actuator front ra dio can re moved reveal recessed switch transmitter case external actuator switch may left off user chooses thus preventing ac cidentally switch ing off transmit ter Mr Richmond spoke Cliff Weirick Airtron ics Cliff pointed out fea ture Van guard transmitter Perhaps fea ture available other models well isnt should Maybe can research get ball rolling response Andreas suggestion get ball rolling ask radio manu facturer/importer may read col umn give some serious consideration type location transmitter on/off switches currently being used prod uct Could transmitter inadvertently turned off due mistaking its on/off switch trim lever change its de sign and/or location Connectors Another letter also mentioned transmitter switch problem zeroed problem servo bat tery pack connectors Bjorn Hammarskjold will shortly returnlntrodudng Zap Zap-a-Gap Quarter Pounders Four ounces worlds finest adhesives suggested retail price $1895 Available now better hobby stores everywhere House Balsa House Balsa 20130 State Road Cerritos California 90701 213 860-1276 toboit Frank Tlano Enterprises Robart 2460 SW 85th Terrace 310 North 5th Street Davie Florida 33324St Charles lllinola 60174 305 473-2211 5847616 Manufactured Pacer rechnology Rancho Cucamonga CA contact has problems looked cause found contacts corrodedthis after /2 years too much use remedy problem now have parallel receiver contacts added male 15-pin D-sub connector model have soldered servos fe male 15-pin D sub connector connectors gold plated dont corrode means change re ceiver plane have disconnect just polarized plug always know have servos cor rectly connected exactly first installed re ceiver plane have used sys tem some years back Sweden works fine always make sure preflight check ensure wires con nected importance preflight check has dis cussed previous Safety columns However following tale Granby MA modeler Doug Macbrien points out have pay attention perform such check 'On Saturday night rigging up another model use same transmitter use favor ite Giant use aileron servo-reversing switch tired finished forgot put ing Sweden native country after aswitch back its normal position two-year stay US postdoctoralThe next morning took Giant modstudent biochemistry Bjorn reported theel field went through hurried following problem solutionpreflight check wiggled sticks did dont always get signal thenot observe whether controls moved servos plug servo contacts receiver Sometimes batteryContinued page 22 20 Model Aviation ZP QUARTER POUNDERS correct direction Immediately after takeoff model started turn left tried correct turned steep ly immediately realized what Id done youve never tried fly model reversed ailerons wont able ap preciate difficult skill ac quired over 10 years RC modeling didnt bit good like being novice first flight Within about 30 seconds rolled model done split S crashed full throttle bush es Luckily no parked cars cause earlyand shudder think what might have happened spectators 'With transmitters out servo-reversing switches vital check controls proper di rection before flight agree both Bjorn Doug Al ways perform preflight check before takeoff ensure correct control function Also will see next letter al ways check trim levers transmit ter time retrieve im pound area Children flying field obvious reasons will see writer next account will remain anonymous As avid RCer years wife would like admit Ive seen problem develop club think needs addressed opinion would appreciated con cerns might take note act accordingly see column national magazine club belong has exis tence about five years has few members have kids toddler age group However member partic ular allows kids roam free around flight line pit area members wife often accompanies him flying field kids sit pay no tention safety annoyance other members roam around totally unsupervised occasion member physically pick up youngest child seat child mother tell mother didnt come out fly ing field babysit another occasion children picked up transmitter changed set ting several trim levers might guess surprise awaiting its owner next takeoff Apparently someone must have com plained club member father kids club officer cause recent meeting got up soapbox declared felt kids safer flight line side anywhere else field nobody said anything response statement dont believe everyone $999$749$729$689$599$150 $1152$864$841$772$691$212 ________ $1288$965$939$862$772$266 _______ $1372$1029$1002$919$823$301 _______ $1459$1094$1065$977$876$336 _______ RED MAX RACING FUEL Trophy winner planes boats & cars two boat blends castor ok up 40% nitro RED MAX20$1775$1332$1296$1190$1065 $464 REDMAX2S$1965$1474$1435$1317$1179 $541 RED MAX4O$2539$1905$1894$1701$1524 $774 RED MAX 50$2922$2192$2133$1958$1753 $929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 6593497$2622$2552$2343$209891162 RED MAX 4-CYCLE FUEL Eliminates detonation & kickback 4-cycle engines smoother Idle & power 10-4 CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1166 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1165 $1060 $950$386 RED MAX PERFORMANCE FUEL High flash point heavy oil use tuned pipes ducted fan & other heavy dty app $ Performance$1200$900$876$804$720_____ 10 Performance $1391$1043$1016$922$835_______ iSPerlormance $1583 $1187 $1155 $1060 $950_______ RED MAX PATTERN FUEL Proven best fuel pettsrn engines using pumps tuned pipes 5 Pattern$1198$ 895 $ 870 $ 795 $695________ 10 Pattern$1375$1035 $1009 $ 925 $825_______ iSPattern$1575 $1175 $1145 $1050 $940_______ SUPER TIGER 3000 FUEL Beet fuel Super Tiger 2000-4000 engines .......SuperTiger3000 $1288 $965 $939 $862 $772 RED MAX DIESEL FUEL Superior diesel back list popular demand customers Ball Bearings91767 $1326 $1260 $11 84 $1050________ DieedFlaiiBesings$1867$1426$1360$1294$1160 $225 _________ $299 _________ $375 ________ $266 Power easy starting power Smooth take off s power intricate maneuvers Red MaX makes engine come alive power performance never expected can have power Its phone call away Power today next week next year Red Maxs secret gredients keep engine last ing longer running power fully other 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics other fuel 22 Model Aviation Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL IN OTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free pit gals No hand ling charge Freight collect drums Deduct 3% prepay Mix ply Total pW deter mines price SC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD COD add $2 per cartoni Personal checks may held until cleared OTYFUEL1 GAL 4 GAL 24 GAL 60 GAL 120 Gal ordered MIXTURE RUMAMT RED MAX PREMIUM FUELGAL TOTAL $ fuel beginners ft sport flyers should use Avail synthetic castor blend RED MAX 0 RED MAX S RED MAX 10 RED MAX 12 RED MAX 15 RED MAX FUEL Continued page 135 $231 _________ $309 ___ $396___ Grand Total SMOKER FLUID beat smoker fluid 2 4 cycle engines Smoker Fluid$1265 $965 $939 $862 $772$261 CUSTOM BLENDED FUEL INGRDIENTS Available type engine use Cell price Mm gallon boats-cars-hellcopterssoeedoetternscala/ scaiskavan-ianieirinsntMi PLEASE PRINT BOX STRE FT CITY TATF 71P CARD TYPE AND NO EXPIRAl NI TE SR Battery Packs Make Clean Sweep 89 KRC Electric Fly! Saturday Sunday September 16 17 10th annual KRC Electric Fly held Quakertown PA year two different types endurance events held Saturday Sunday Although weather miserable Saturday up last down event held 12 contestants participated four top finishers using SR packs First place won using SR 1250 Series Magnum pack second place won using SR 1250 Series Magnum pack third place won using SR 1800 Series Magnum pack fourth place won using SR 900 Series Max pack Sunday weather much better different type endurance event held Instead simply longest possible flight contestant made series 4 minute flights 2 minute period between flights retrieve planes allowed recharge change battery packs between flights contestant logged highest number 4 minute flights plus number seconds last flight won objective minimize affect thermals outcome event again SR Battery packs made clean sweep event First place won using SR 1250 Series Magnum pack second place won using SR 1000 Series Max pack third place won using SR 1250 Series Magnum pack As can see comes Electric Power battery packs SR Packs cant beat Two years ago SR recognized need series cells designed exclusively electric flier new series would have give electric fliers longest possible motor runs lowest possible weight new SR Magnum Series cells outgrowth research development Magnum Series cells pack 40% 50% capacity cell increasing its size weight Magnum cells primarily designed Sport applications maximum current load 12 15 amps intermittent applications SRs EP Max Pack Cells other hand designed lowest possible internal impedance could handle extremely high current loads continuous discharge rates 15 30 amps SR Max Pack cells best choice rather Magnum cells addition Electric Flight battery packs SR now Stop source Electric Flight supplies SR now stocks motors props chargers wire connectors switches just about anything else might need Electric Flight addition everyone SR will too happy answer questions help solve problems might have place order ask question can reach us calling Hotline 516-286-0079 between 9am 5pm Monday through Friday youd like us send literature send self addressed business size envelope 50 cents postage SR Batteries Inc Box 287 Bellport NY 11713 -ADVERTISEMENTSafety/Preston Continued page 22 agreed way thinking Back May 1980 Safety column published list flying field rules compiled rules differ ent clubs list contained 43 different rules intention clubs should select believed applied operations list did ad dress pets Rule #39 Pets shall con fined spectator area did specifically address kids However two rules applying adults seem equally appropriate kids Rule #11 Spectators welcome must remain designated area lieve should also apply young chil dren unless escorted parent club member gnated area spectators does include pit area flight line Rule #21 Pilots must stand marked pilots box Only pilots instruc tors spottersare permitted stand pilots box dont believe children toddler age likely qualified pi lots instructors spotters other words dont believe toddlers should permitted flight line So now have opinion right ful place children flying field However please dont misunderstand am very much favor hobby being family affair possible Bring kids flying field means own protection please dont let roam around unsupervised As column points out month accidents hap pen Lets have victims children encourage anyone wishing express different viewpoint concerning issue write Meanwhile lets have safe month Skyvolt/Kopski Continued page 34 ter repinning place add hard /16 x -in leading edge strip top ai leron bottom sheets shown Making sure strip perpendicular surface easily done small blocks pictured spread thin CyA along joint Take care glue blocks process Lightly run felt-tip marking pen over top edge leading edge strip color Using small sanding block tape covering corner edge carefi1ly sand away darkened top edge leading edge strip As maneuver tape-covered corner block bottom sheet-TE joint color disappears youll know leading edge top edge tapered proper angle Its important oversand very front edge strip must remain /4 high Y6 building sur face Fill root end of aileron ta Continued page 138 IA ES MILLS METALS BOOKS PRECISION INSTRUMENTS COMPLETE CATALOG $2 00 1 OUls 0, 4VPDIU FULl Cl S 2100 M So Road Spo oqt old Oh o 45505 mpa 322 8562 January 1990 135 THE WIREMASTER o bender/coder extra large handle bends 118-114 coils 5/ 32-3116 music wire Wire creep eliminated ANTI-KREEP WIRE LOCIV free catalog has hundreds new items free miCro bender offer JCM COMPANY 114 Washington Ter. Waukegan IL 60085 IS* WE BUILD YOUR HELl TEST YOUR HELl YOUR HELl I1- Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION
Edition: Model Aviation - 1990/01
Page Numbers: 14, 16, 18, 20, 22, 135
Watch out Propel lers Transmitter pow er switches Servo-re versing switches left wrong position Re ceiver connectors poor contact Children flying field BEWARE props picture worth thousand words Unfortunately dont have pictures months Safety co lumn However photo appeared October 1989 showing Bob McMul lens hand after repaired 59 stitches resulted number letters readers Several people said Bobs accident has convinced thit isnt wise fly alone Yet still get letters others continue take task preaching safety message Bill Hawks people Bill recently flying 20-yearold grandson too became victim fingers-in-the-prop syndrome stated letter look knew next stop would hospital emer gency room stitches After acci dent Bills grandson disassemble two large models brought fly ing field load station wagon also open combination lock gate field relock gate after driving through As Bill reported alone would have very unhandy tear down planes store everything wagon hassle combination pad lock steel gate addition flying alone Bill says will use plastic props since lieves sharp plastic prop might well have cut finger completely off also wears leather glove left hand holds model feels hand likely come contact prop solution securing model safely starting engine use some type model-holding device have topic discussion previous Safety col umns number market However very simple device can easily make yourself de scribed joint letter Lon Muehlen beck Mike Cribbins Lon Mike Birch Run MI letter prompted description Bob McMullens injuries contained Pol aroid pictures device However dont think would reproduce very well magazine Ill just describe device fabricated length 14 -in-diameter steel rod bent shape horseshoe inverted U similar croquet hoop two legs spaced about five six inches apart cen tral portion covered rubber tubing -in automotive vacuum hose use place two legs over rear fuse lage front horizontal stab push ground assuming grass pit area make devices can either bend 14-in rod vise wrap around metal clothesline pole Lon Mike both have such model-holding devices frequently loan other modelers Another prop incident described Sidney Sharp Hanford CA modeler Sid ney sent copy letter wrote mail order retailer explaining returning parts could find 14 x 6 plastic prop installed YS-1 20 four-stroke engine running full throttle 8000-10000 rpm both blades let loose Fortunately Sid injured workbench now has hole Sid modified prop other remove sharp flash ing leading trailing edges blades bore hub fit shaft 8mm think YS-l 20 engine Suppose injury victim brought lawsuit recover cost treatment Would fact mount ing hole prop hub enlarged have exonerated props manufacturer blame much can enlarge hole prop before compromise strength hub dont have swers questions seems props both wood plastic should have sufficient meat hub area en sure adequate strength bored out fit onto largest shaft engine dis placement prop intended Its since Ive reports Continued page 16 14 Model Aviation John Preston Safety812 Comes First Northampton St NW Washington DC 20015 column i provided address Items concern regarding safety aspects model aviation actIvities Content column however opinion author does necessailly represent official posItion Academy Model Aeronautics --I S EQ 0 0 W WIAT DI ttLtR P4fljE AND 1LLIA AO4T P1141*4 ACI4ND 14E ALt4EV . ttU MLC*IT 4UT YOURBLVE/ Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose e Radio installation e Straight wing building e Installing hinges OShear webbing e Applying FG cloth eSerno installation e Setting up new radio e Built-up tail surfaces o Slab tail surlaces e Aileron installation CRFflIT CAR Fuel tank installation eNew engine setup e Fuselage construction eBUILDING STRAIGHT e Installing pustrods eCovering film e Eliminating warps e Aligning Balancing e Final checkout ePLUS MUCH MORE! .uoiuInIcno Use toll tree number place order Have j74 MasterCard VISA ready call OR mail $24g5 S & H TO MasterCardPLANE VIDEO PO Box 23128 Des Moines IA 50322 Iowa residents add 4% sales tax 0 Kr 18003838251 props being kicked off shafts fourstroke engines Maybe modelers now able adjust mixture prevent backfires perhaps people using locknuts such engines letter Eloy Marez service manager Futaba Corporation imports YS 120 four-stroke engine enclosed copy por tion engines instructions shows comes double locknuts safety Eloy states best knowledge has completely elim inated prop-kicking problem Eloys letter also drew attention ads model-size gas turbine engines have begun appear modeling press Will use such engines present special safety problems did note subject turbojet safety raised July 14 AMA Executive Council meeting AMA Safety Committee has asked develop operating criteria acceptability safety standards see page 117 November 1989 issue magazine contemplating use gas tur bine engine near future might want contact member Safety Committee see what have mind Back propellers Bill Spathias mod eler since 1948 resides Dallas TX sent letter describing incident frankly admits should qualify him SOY Sap Year award Bills tale woe goes like Continued page 18 Geared $ 9771 Geared $ltO46 Geared $12749 Geared $16145 Geared $t8696 Geared $31671 $8296 $5500 $3200 $5996 $3196 ASTRO FLIGHT SYSTEMS Cballenger Cobat 4 cell 020 Direct $ 7645 Challenger CabOt 5 cell 035 Direct 9 8920 ChallengerCabat7 cell 09 Direct $lte21 Challenger Cobalt l2cet 15 Direct $14020 Csallenger CabOt 14 cell 25 Direct $16570 Csallenger Cobalt 118 cell 40 Direct $19545 CtallengerCobat 24 cell 61 Direct $28471 Astro DC/DC Onper Charger up 1028 culls Astro AC/DC Csarger carrent 04051 Astro DC/DC Csarger Astro Electric Threttle Anlro On-OS Molar Control Electronic AQQH Anderson Pacer Pole Connector 4 Esasings / 4 pins $200 / yr Gold Pin Malen Connector$210 /pr Tarniya Connector$150/pr Hi-Plea Wire39 ea redo Slack 16 Gai240 Strand$200 Daveys 30 Ans Metert$1999 Micro Swech Harneost$450 3/16 Plat Braid tar Soldering Batteries$050/S Heat Shrink Tobing Pot Banenes 29 tar 4SOAR 900012000CR P101 PaCks 3 tsr 800AR Plat Packs 4 tar OOOAR 012000CR Stacked Packs SANYO CIJTOPF RATTERV PACKS $190/fl $180/fl $109 /9 * t & CELLS 4 Cell 4SOmA$1990 9 Cell 490rmA $2300 490AR $3SOea 6 Cell 500mA$2920 7Cell 600 InS 93319 OOSAR $39tea 6 Cell 900 rrsA $2980 7 Cell 900 InS $3389 900SCR $dSSea 6 Cell l200mA $2920 7 Cell l200nnA $3210 12000CR$3Stea packs wired 1101 packs 1 Please specity desired connectors ELECTRIC POWER KITS MMC Utra MIt IV 88 Span Sailplane tar 05 Gear$3796 MMC Electric Playboy 67 Span Old Timer tsr 00 Gear$2600 Astro Challenger 73 Span Sailplane tarts Gear$3250 EMD Electra Glue II 73 Span Sailplane torso$3100 EMD Themlic Traveler Sailplane 76 Span tar 09$3100 EMD Sky Knight 44 Span Trainer torsO$2400 EMD Lightning 39 Span Aerobatic Span Model tar 09$2400 MMC Past Eddie Aerobatic Spas Model tortS$2400 Astro Soya 37 Sean Aerobatic Snee Model tsr 05$2400 SHIPPINO & IIANOLINO76POgcCATALOOUS Up $800 add$200$200 pp/lot Class froc $9Ot t5 $2000 add$290whrn rrqacstcd ordcr $2001 $4900 add$329 $4501 $7000 add$379 Over $7000 add$450HOBBY HORN CA Addressees 0406% tao Send 3 Moran St [A] MO VISA/ MC 50 Eap Date OBOX 2212 Check allow opts30 days tarWestmnoter Ca 92684 check clearance COD Enact charges plan $190 823-8311 handling Cash OnlyHrs MDP-Fr SAM 5PM 16 Model Aviation MAUL MbIMU HULdI 1/4 SCALE 98 PIPER SUPER CUBCORBEN SUPER ACE 1/4 SCALE 1071/4 SCALE 80 NEWHObbY Horn ~VHS-4 HOUR FORMAT y pe \t~V tape youve waiting isfinallyherell youre new hobby just want learn secret wood plane construction YOU PLANE VIDEO Presents BuILDING IT RIGHT THE FIRST TIME FIRST NO-NONSENSE VIDEO OF WOOD AIRCRAFT CONSTRUCTION APPROX 4 HOURS ON e A3A BALSA SHEETS 36 45 30 118233 332240 18 o243 316249 14 256 132337 1 20337 1 1833748 31 3323445837 18354 71 45 318362 82 55 143738561 518385110 38 388124 71 123110155 343165181 118458 7648 332470 9458 1848010888 318493122 75 14 4110134 84 38 4165225138 12 4225281 MATCHED SHEETS42 3324100 194108 3164120 144131 BALSA SliCKS 3648 1161408 1163810 1161214 332 1410 332 3812 3321216 18 1808 18141118 18 381218 18121024 3183161118 316 381720 316 122230 14 141624 14 381926 4122130 14 343444 14 14055 5165162128 38 382737 38 123248 38 344255 38 15270 12123853 12344682 12 15878 58 584885 34 346790 *1 BALSA TRIANGLES 36 25 8830 35 345 55 BALSA PLANKS36 85 50 06 14zOO 1123275 1124360 22225 23325 24435 33485 34688 TAPERED SHEETS36 142 85 14385 38288 38398 123120 LONE STAR EPOXY 9orLSt-8 95 5r0598 15,,598 30oo598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 46 LB WOOD36 132353 120353 116353 32363 18377 316389 143104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 364236 124322 TRAILING EDGE 36 14132 51611439 3811246 12270 INSTANT DL UE 1, Tlrck296 1 oo Oh,298j 20 05ck550 20 18,550 must try 46 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 1/8 1/81725 16 142026 18 382232 3163162838 14 143450 14 384055 14 0124585 38 3/84869 381/26077 1/2 128868 1234 75 97 SPRUCE TRIANGLES 3/83/8 1212 34 34 LITE PL V 48 1/8x6 1/8 x 12 1/46 114 x 12 BASSWOOD48 31631626 3181430 3183838 3161248 3163460 141442 143649 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 201/16336899 201164361035 20332 336885 15-3/32 438955 151/8338735 1018438895 153163036920 10316436835 1014336855 1014438830 1038336870 536436859 5112336540 51/24361080 10-3/32 0448885 518446500 5316 00 514448645 HARD MAPLE 1 4 38 3838 38 12 3834 1234 18 40 45 50 56 68 BIRCHOOWELS36 18 09 31611 1414 51625 3832 3PLYEIRCII 48 1164x12835 1I32x12475 1I16x12475 11812495 5 PLY3iRCH48 313212700 1I8x12775 363/16x12625 47114x12625 64318x12725 8111212900 GROOVEDLGMtiUNTS 12 Inches 3/834/1 8/40 3/834/532/40 1234/316/45 175 350 275 550 LONE STAR MODELS cant Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 states Weaccept \Pisa MasterCard personal checks coo 65 % tax Texas US currencyonly Minimum Wood Order $1000 working son s hot Fox 50 wanted run short burst dry out storage shop vise handy thought would use hold engine going short run snugged engine vise between two pieces pine primed flipped prop As usual started first try wound up like B-29 garage took off out vise like wings thing actually flew two short feet between vise stomach straight arrow saw slow mo tion just like movies no time move cut causing three lacerations took eight stitches close Luckily wife home staggered house thought shot Thats bad looked blood everywhere luck completely bad day because prior starting engine noticed fiberglass propeller sharp knife Through force habit sanded edges smooth shudder think bad would have done hope will help keep other mod elers trying stunt Transmitter power switches Another topic October 89 column drew some mail story about crash Bob Bingamans Flying Quaker due transmitter being inadvertently Continued page 20 ota timer perfectly proportioned modeling Curtiss Robin 049 EngInes -Channel R/C 41 WIngspan ElectrIc Power Optional o oa Very leon lu/I scale aircraft ideally suited model flight s appealing old curt/os Robin born spruce linen age beautil,lly proportioned tar rubber electric glow engines Easy fun build tralnerlike perfarnance Flyline Models caleb8 508 PhOne 170312736693 FLYLINE MODELS INC 7PO Boa 2136 Pslrfax VIrgInIa 22031 LiSA TO YOUR LOCAL WIMT7I~ HOBBY SHOP GUN7 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE Cell 006 745 6394 10am 6pm Central Time BLUES CA getting down get protected CA mask Safety Plus mask will eliminate CA fumes epoxy polyester resin vapors air breath Lightweight easy breathing comfortable CA Mask $1595 Paint Mask $2045 See hobby dealer first doesnt have what need order direct Safety Plus PO Box 1173 Dept 12M Clinton Mississippi 39056 Call toll free 1-800-842-7233 Mississippi dial 601-924-9640 VISA MASTERCARD accepted COD add $250 shipping handling included Dealer Inquiries Invited PLU5 18 Model Aviation bust completely finished authentically detailed poseable 1/8 scale Ifl 90 unirprmxaas 12091224-4170 p 0 box 5631trosno Co 93755 turned off Bob mistook on/off switch Airtronics Vanguard transmit ter throttle trim lever asked modelers send thoughts design transmitter switches letter re sponding request came North Dakota modeler Frank Cudworth re ported similar experience Futaba 5UAP PCM trans mitter Another letter subject Mrs An drea Belk Sac ramento CA has solution problem have Vanguard transmitter An drea wrote Septem ber 89 issue Model Builder magazine product review Vanguard PCM radio author Stu Rich mond addresses problem ac cidental shutoff points out special feature radio transmit ter on/off switch actuator front ra dio can re moved reveal recessed switch transmitter case external actuator switch may left off user chooses thus preventing ac cidentally switch ing off transmit ter Mr Richmond spoke Cliff Weirick Airtron ics Cliff pointed out fea ture Van guard transmitter Perhaps fea ture available other models well isnt should Maybe can research get ball rolling response Andreas suggestion get ball rolling ask radio manu facturer/importer may read col umn give some serious consideration type location transmitter on/off switches currently being used prod uct Could transmitter inadvertently turned off due mistaking its on/off switch trim lever change its de sign and/or location Connectors Another letter also mentioned transmitter switch problem zeroed problem servo bat tery pack connectors Bjorn Hammarskjold will shortly returnlntrodudng Zap Zap-a-Gap Quarter Pounders Four ounces worlds finest adhesives suggested retail price $1895 Available now better hobby stores everywhere House Balsa House Balsa 20130 State Road Cerritos California 90701 213 860-1276 toboit Frank Tlano Enterprises Robart 2460 SW 85th Terrace 310 North 5th Street Davie Florida 33324St Charles lllinola 60174 305 473-2211 5847616 Manufactured Pacer rechnology Rancho Cucamonga CA contact has problems looked cause found contacts corrodedthis after /2 years too much use remedy problem now have parallel receiver contacts added male 15-pin D-sub connector model have soldered servos fe male 15-pin D sub connector connectors gold plated dont corrode means change re ceiver plane have disconnect just polarized plug always know have servos cor rectly connected exactly first installed re ceiver plane have used sys tem some years back Sweden works fine always make sure preflight check ensure wires con nected importance preflight check has dis cussed previous Safety columns However following tale Granby MA modeler Doug Macbrien points out have pay attention perform such check 'On Saturday night rigging up another model use same transmitter use favor ite Giant use aileron servo-reversing switch tired finished forgot put ing Sweden native country after aswitch back its normal position two-year stay US postdoctoralThe next morning took Giant modstudent biochemistry Bjorn reported theel field went through hurried following problem solutionpreflight check wiggled sticks did dont always get signal thenot observe whether controls moved servos plug servo contacts receiver Sometimes batteryContinued page 22 20 Model Aviation ZP QUARTER POUNDERS correct direction Immediately after takeoff model started turn left tried correct turned steep ly immediately realized what Id done youve never tried fly model reversed ailerons wont able ap preciate difficult skill ac quired over 10 years RC modeling didnt bit good like being novice first flight Within about 30 seconds rolled model done split S crashed full throttle bush es Luckily no parked cars cause earlyand shudder think what might have happened spectators 'With transmitters out servo-reversing switches vital check controls proper di rection before flight agree both Bjorn Doug Al ways perform preflight check before takeoff ensure correct control function Also will see next letter al ways check trim levers transmit ter time retrieve im pound area Children flying field obvious reasons will see writer next account will remain anonymous As avid RCer years wife would like admit Ive seen problem develop club think needs addressed opinion would appreciated con cerns might take note act accordingly see column national magazine club belong has exis tence about five years has few members have kids toddler age group However member partic ular allows kids roam free around flight line pit area members wife often accompanies him flying field kids sit pay no tention safety annoyance other members roam around totally unsupervised occasion member physically pick up youngest child seat child mother tell mother didnt come out fly ing field babysit another occasion children picked up transmitter changed set ting several trim levers might guess surprise awaiting its owner next takeoff Apparently someone must have com plained club member father kids club officer cause recent meeting got up soapbox declared felt kids safer flight line side anywhere else field nobody said anything response statement dont believe everyone $999$749$729$689$599$150 $1152$864$841$772$691$212 ________ $1288$965$939$862$772$266 _______ $1372$1029$1002$919$823$301 _______ $1459$1094$1065$977$876$336 _______ RED MAX RACING FUEL Trophy winner planes boats & cars two boat blends castor ok up 40% nitro RED MAX20$1775$1332$1296$1190$1065 $464 REDMAX2S$1965$1474$1435$1317$1179 $541 RED MAX4O$2539$1905$1894$1701$1524 $774 RED MAX 50$2922$2192$2133$1958$1753 $929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 6593497$2622$2552$2343$209891162 RED MAX 4-CYCLE FUEL Eliminates detonation & kickback 4-cycle engines smoother Idle & power 10-4 CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1166 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1165 $1060 $950$386 RED MAX PERFORMANCE FUEL High flash point heavy oil use tuned pipes ducted fan & other heavy dty app $ Performance$1200$900$876$804$720_____ 10 Performance $1391$1043$1016$922$835_______ iSPerlormance $1583 $1187 $1155 $1060 $950_______ RED MAX PATTERN FUEL Proven best fuel pettsrn engines using pumps tuned pipes 5 Pattern$1198$ 895 $ 870 $ 795 $695________ 10 Pattern$1375$1035 $1009 $ 925 $825_______ iSPattern$1575 $1175 $1145 $1050 $940_______ SUPER TIGER 3000 FUEL Beet fuel Super Tiger 2000-4000 engines .......SuperTiger3000 $1288 $965 $939 $862 $772 RED MAX DIESEL FUEL Superior diesel back list popular demand customers Ball Bearings91767 $1326 $1260 $11 84 $1050________ DieedFlaiiBesings$1867$1426$1360$1294$1160 $225 _________ $299 _________ $375 ________ $266 Power easy starting power Smooth take off s power intricate maneuvers Red MaX makes engine come alive power performance never expected can have power Its phone call away Power today next week next year Red Maxs secret gredients keep engine last ing longer running power fully other 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics other fuel 22 Model Aviation Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL IN OTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free pit gals No hand ling charge Freight collect drums Deduct 3% prepay Mix ply Total pW deter mines price SC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD COD add $2 per cartoni Personal checks may held until cleared OTYFUEL1 GAL 4 GAL 24 GAL 60 GAL 120 Gal ordered MIXTURE RUMAMT RED MAX PREMIUM FUELGAL TOTAL $ fuel beginners ft sport flyers should use Avail synthetic castor blend RED MAX 0 RED MAX S RED MAX 10 RED MAX 12 RED MAX 15 RED MAX FUEL Continued page 135 $231 _________ $309 ___ $396___ Grand Total SMOKER FLUID beat smoker fluid 2 4 cycle engines Smoker Fluid$1265 $965 $939 $862 $772$261 CUSTOM BLENDED FUEL INGRDIENTS Available type engine use Cell price Mm gallon boats-cars-hellcopterssoeedoetternscala/ scaiskavan-ianieirinsntMi PLEASE PRINT BOX STRE FT CITY TATF 71P CARD TYPE AND NO EXPIRAl NI TE SR Battery Packs Make Clean Sweep 89 KRC Electric Fly! Saturday Sunday September 16 17 10th annual KRC Electric Fly held Quakertown PA year two different types endurance events held Saturday Sunday Although weather miserable Saturday up last down event held 12 contestants participated four top finishers using SR packs First place won using SR 1250 Series Magnum pack second place won using SR 1250 Series Magnum pack third place won using SR 1800 Series Magnum pack fourth place won using SR 900 Series Max pack Sunday weather much better different type endurance event held Instead simply longest possible flight contestant made series 4 minute flights 2 minute period between flights retrieve planes allowed recharge change battery packs between flights contestant logged highest number 4 minute flights plus number seconds last flight won objective minimize affect thermals outcome event again SR Battery packs made clean sweep event First place won using SR 1250 Series Magnum pack second place won using SR 1000 Series Max pack third place won using SR 1250 Series Magnum pack As can see comes Electric Power battery packs SR Packs cant beat Two years ago SR recognized need series cells designed exclusively electric flier new series would have give electric fliers longest possible motor runs lowest possible weight new SR Magnum Series cells outgrowth research development Magnum Series cells pack 40% 50% capacity cell increasing its size weight Magnum cells primarily designed Sport applications maximum current load 12 15 amps intermittent applications SRs EP Max Pack Cells other hand designed lowest possible internal impedance could handle extremely high current loads continuous discharge rates 15 30 amps SR Max Pack cells best choice rather Magnum cells addition Electric Flight battery packs SR now Stop source Electric Flight supplies SR now stocks motors props chargers wire connectors switches just about anything else might need Electric Flight addition everyone SR will too happy answer questions help solve problems might have place order ask question can reach us calling Hotline 516-286-0079 between 9am 5pm Monday through Friday youd like us send literature send self addressed business size envelope 50 cents postage SR Batteries Inc Box 287 Bellport NY 11713 -ADVERTISEMENTSafety/Preston Continued page 22 agreed way thinking Back May 1980 Safety column published list flying field rules compiled rules differ ent clubs list contained 43 different rules intention clubs should select believed applied operations list did ad dress pets Rule #39 Pets shall con fined spectator area did specifically address kids However two rules applying adults seem equally appropriate kids Rule #11 Spectators welcome must remain designated area lieve should also apply young chil dren unless escorted parent club member gnated area spectators does include pit area flight line Rule #21 Pilots must stand marked pilots box Only pilots instruc tors spottersare permitted stand pilots box dont believe children toddler age likely qualified pi lots instructors spotters other words dont believe toddlers should permitted flight line So now have opinion right ful place children flying field However please dont misunderstand am very much favor hobby being family affair possible Bring kids flying field means own protection please dont let roam around unsupervised As column points out month accidents hap pen Lets have victims children encourage anyone wishing express different viewpoint concerning issue write Meanwhile lets have safe month Skyvolt/Kopski Continued page 34 ter repinning place add hard /16 x -in leading edge strip top ai leron bottom sheets shown Making sure strip perpendicular surface easily done small blocks pictured spread thin CyA along joint Take care glue blocks process Lightly run felt-tip marking pen over top edge leading edge strip color Using small sanding block tape covering corner edge carefi1ly sand away darkened top edge leading edge strip As maneuver tape-covered corner block bottom sheet-TE joint color disappears youll know leading edge top edge tapered proper angle Its important oversand very front edge strip must remain /4 high Y6 building sur face Fill root end of aileron ta Continued page 138 IA ES MILLS METALS BOOKS PRECISION INSTRUMENTS COMPLETE CATALOG $2 00 1 OUls 0, 4VPDIU FULl Cl S 2100 M So Road Spo oqt old Oh o 45505 mpa 322 8562 January 1990 135 THE WIREMASTER o bender/coder extra large handle bends 118-114 coils 5/ 32-3116 music wire Wire creep eliminated ANTI-KREEP WIRE LOCIV free catalog has hundreds new items free miCro bender offer JCM COMPANY 114 Washington Ter. Waukegan IL 60085 IS* WE BUILD YOUR HELl TEST YOUR HELl YOUR HELl I1- Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION
Edition: Model Aviation - 1990/01
Page Numbers: 14, 16, 18, 20, 22, 135
Watch out Propel lers Transmitter pow er switches Servo-re versing switches left wrong position Re ceiver connectors poor contact Children flying field BEWARE props picture worth thousand words Unfortunately dont have pictures months Safety co lumn However photo appeared October 1989 showing Bob McMul lens hand after repaired 59 stitches resulted number letters readers Several people said Bobs accident has convinced thit isnt wise fly alone Yet still get letters others continue take task preaching safety message Bill Hawks people Bill recently flying 20-yearold grandson too became victim fingers-in-the-prop syndrome stated letter look knew next stop would hospital emer gency room stitches After acci dent Bills grandson disassemble two large models brought fly ing field load station wagon also open combination lock gate field relock gate after driving through As Bill reported alone would have very unhandy tear down planes store everything wagon hassle combination pad lock steel gate addition flying alone Bill says will use plastic props since lieves sharp plastic prop might well have cut finger completely off also wears leather glove left hand holds model feels hand likely come contact prop solution securing model safely starting engine use some type model-holding device have topic discussion previous Safety col umns number market However very simple device can easily make yourself de scribed joint letter Lon Muehlen beck Mike Cribbins Lon Mike Birch Run MI letter prompted description Bob McMullens injuries contained Pol aroid pictures device However dont think would reproduce very well magazine Ill just describe device fabricated length 14 -in-diameter steel rod bent shape horseshoe inverted U similar croquet hoop two legs spaced about five six inches apart cen tral portion covered rubber tubing -in automotive vacuum hose use place two legs over rear fuse lage front horizontal stab push ground assuming grass pit area make devices can either bend 14-in rod vise wrap around metal clothesline pole Lon Mike both have such model-holding devices frequently loan other modelers Another prop incident described Sidney Sharp Hanford CA modeler Sid ney sent copy letter wrote mail order retailer explaining returning parts could find 14 x 6 plastic prop installed YS-1 20 four-stroke engine running full throttle 8000-10000 rpm both blades let loose Fortunately Sid injured workbench now has hole Sid modified prop other remove sharp flash ing leading trailing edges blades bore hub fit shaft 8mm think YS-l 20 engine Suppose injury victim brought lawsuit recover cost treatment Would fact mount ing hole prop hub enlarged have exonerated props manufacturer blame much can enlarge hole prop before compromise strength hub dont have swers questions seems props both wood plastic should have sufficient meat hub area en sure adequate strength bored out fit onto largest shaft engine dis placement prop intended Its since Ive reports Continued page 16 14 Model Aviation John Preston Safety812 Comes First Northampton St NW Washington DC 20015 column i provided address Items concern regarding safety aspects model aviation actIvities Content column however opinion author does necessailly represent official posItion Academy Model Aeronautics --I S EQ 0 0 W WIAT DI ttLtR P4fljE AND 1LLIA AO4T P1141*4 ACI4ND 14E ALt4EV . ttU MLC*IT 4UT YOURBLVE/ Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose e Radio installation e Straight wing building e Installing hinges OShear webbing e Applying FG cloth eSerno installation e Setting up new radio e Built-up tail surfaces o Slab tail surlaces e Aileron installation CRFflIT CAR Fuel tank installation eNew engine setup e Fuselage construction eBUILDING STRAIGHT e Installing pustrods eCovering film e Eliminating warps e Aligning Balancing e Final checkout ePLUS MUCH MORE! .uoiuInIcno Use toll tree number place order Have j74 MasterCard VISA ready call OR mail $24g5 S & H TO MasterCardPLANE VIDEO PO Box 23128 Des Moines IA 50322 Iowa residents add 4% sales tax 0 Kr 18003838251 props being kicked off shafts fourstroke engines Maybe modelers now able adjust mixture prevent backfires perhaps people using locknuts such engines letter Eloy Marez service manager Futaba Corporation imports YS 120 four-stroke engine enclosed copy por tion engines instructions shows comes double locknuts safety Eloy states best knowledge has completely elim inated prop-kicking problem Eloys letter also drew attention ads model-size gas turbine engines have begun appear modeling press Will use such engines present special safety problems did note subject turbojet safety raised July 14 AMA Executive Council meeting AMA Safety Committee has asked develop operating criteria acceptability safety standards see page 117 November 1989 issue magazine contemplating use gas tur bine engine near future might want contact member Safety Committee see what have mind Back propellers Bill Spathias mod eler since 1948 resides Dallas TX sent letter describing incident frankly admits should qualify him SOY Sap Year award Bills tale woe goes like Continued page 18 Geared $ 9771 Geared $ltO46 Geared $12749 Geared $16145 Geared $t8696 Geared $31671 $8296 $5500 $3200 $5996 $3196 ASTRO FLIGHT SYSTEMS Cballenger Cobat 4 cell 020 Direct $ 7645 Challenger CabOt 5 cell 035 Direct 9 8920 ChallengerCabat7 cell 09 Direct $lte21 Challenger Cobalt l2cet 15 Direct $14020 Csallenger CabOt 14 cell 25 Direct $16570 Csallenger Cobalt 118 cell 40 Direct $19545 CtallengerCobat 24 cell 61 Direct $28471 Astro DC/DC Onper Charger up 1028 culls Astro AC/DC Csarger carrent 04051 Astro DC/DC Csarger Astro Electric Threttle Anlro On-OS Molar Control Electronic AQQH Anderson Pacer Pole Connector 4 Esasings / 4 pins $200 / yr Gold Pin Malen Connector$210 /pr Tarniya Connector$150/pr Hi-Plea Wire39 ea redo Slack 16 Gai240 Strand$200 Daveys 30 Ans Metert$1999 Micro Swech Harneost$450 3/16 Plat Braid tar Soldering Batteries$050/S Heat Shrink Tobing Pot Banenes 29 tar 4SOAR 900012000CR P101 PaCks 3 tsr 800AR Plat Packs 4 tar OOOAR 012000CR Stacked Packs SANYO CIJTOPF RATTERV PACKS $190/fl $180/fl $109 /9 * t & CELLS 4 Cell 4SOmA$1990 9 Cell 490rmA $2300 490AR $3SOea 6 Cell 500mA$2920 7Cell 600 InS 93319 OOSAR $39tea 6 Cell 900 rrsA $2980 7 Cell 900 InS $3389 900SCR $dSSea 6 Cell l200mA $2920 7 Cell l200nnA $3210 12000CR$3Stea packs wired 1101 packs 1 Please specity desired connectors ELECTRIC POWER KITS MMC Utra MIt IV 88 Span Sailplane tar 05 Gear$3796 MMC Electric Playboy 67 Span Old Timer tsr 00 Gear$2600 Astro Challenger 73 Span Sailplane tarts Gear$3250 EMD Electra Glue II 73 Span Sailplane torso$3100 EMD Themlic Traveler Sailplane 76 Span tar 09$3100 EMD Sky Knight 44 Span Trainer torsO$2400 EMD Lightning 39 Span Aerobatic Span Model tar 09$2400 MMC Past Eddie Aerobatic Spas Model tortS$2400 Astro Soya 37 Sean Aerobatic Snee Model tsr 05$2400 SHIPPINO & IIANOLINO76POgcCATALOOUS Up $800 add$200$200 pp/lot Class froc $9Ot t5 $2000 add$290whrn rrqacstcd ordcr $2001 $4900 add$329 $4501 $7000 add$379 Over $7000 add$450HOBBY HORN CA Addressees 0406% tao Send 3 Moran St [A] MO VISA/ MC 50 Eap Date OBOX 2212 Check allow opts30 days tarWestmnoter Ca 92684 check clearance COD Enact charges plan $190 823-8311 handling Cash OnlyHrs MDP-Fr SAM 5PM 16 Model Aviation MAUL MbIMU HULdI 1/4 SCALE 98 PIPER SUPER CUBCORBEN SUPER ACE 1/4 SCALE 1071/4 SCALE 80 NEWHObbY Horn ~VHS-4 HOUR FORMAT y pe \t~V tape youve waiting isfinallyherell youre new hobby just want learn secret wood plane construction YOU PLANE VIDEO Presents BuILDING IT RIGHT THE FIRST TIME FIRST NO-NONSENSE VIDEO OF WOOD AIRCRAFT CONSTRUCTION APPROX 4 HOURS ON e A3A BALSA SHEETS 36 45 30 118233 332240 18 o243 316249 14 256 132337 1 20337 1 1833748 31 3323445837 18354 71 45 318362 82 55 143738561 518385110 38 388124 71 123110155 343165181 118458 7648 332470 9458 1848010888 318493122 75 14 4110134 84 38 4165225138 12 4225281 MATCHED SHEETS42 3324100 194108 3164120 144131 BALSA SliCKS 3648 1161408 1163810 1161214 332 1410 332 3812 3321216 18 1808 18141118 18 381218 18121024 3183161118 316 381720 316 122230 14 141624 14 381926 4122130 14 343444 14 14055 5165162128 38 382737 38 123248 38 344255 38 15270 12123853 12344682 12 15878 58 584885 34 346790 *1 BALSA TRIANGLES 36 25 8830 35 345 55 BALSA PLANKS36 85 50 06 14zOO 1123275 1124360 22225 23325 24435 33485 34688 TAPERED SHEETS36 142 85 14385 38288 38398 123120 LONE STAR EPOXY 9orLSt-8 95 5r0598 15,,598 30oo598 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 46 LB WOOD36 132353 120353 116353 32363 18377 316389 143104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 364236 124322 TRAILING EDGE 36 14132 51611439 3811246 12270 INSTANT DL UE 1, Tlrck296 1 oo Oh,298j 20 05ck550 20 18,550 must try 46 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 1/8 1/81725 16 142026 18 382232 3163162838 14 143450 14 384055 14 0124585 38 3/84869 381/26077 1/2 128868 1234 75 97 SPRUCE TRIANGLES 3/83/8 1212 34 34 LITE PL V 48 1/8x6 1/8 x 12 1/46 114 x 12 BASSWOOD48 31631626 3181430 3183838 3161248 3163460 141442 143649 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 201/16336899 201164361035 20332 336885 15-3/32 438955 151/8338735 1018438895 153163036920 10316436835 1014336855 1014438830 1038336870 536436859 5112336540 51/24361080 10-3/32 0448885 518446500 5316 00 514448645 HARD MAPLE 1 4 38 3838 38 12 3834 1234 18 40 45 50 56 68 BIRCHOOWELS36 18 09 31611 1414 51625 3832 3PLYEIRCII 48 1164x12835 1I32x12475 1I16x12475 11812495 5 PLY3iRCH48 313212700 1I8x12775 363/16x12625 47114x12625 64318x12725 8111212900 GROOVEDLGMtiUNTS 12 Inches 3/834/1 8/40 3/834/532/40 1234/316/45 175 350 275 550 LONE STAR MODELS cant Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 states Weaccept \Pisa MasterCard personal checks coo 65 % tax Texas US currencyonly Minimum Wood Order $1000 working son s hot Fox 50 wanted run short burst dry out storage shop vise handy thought would use hold engine going short run snugged engine vise between two pieces pine primed flipped prop As usual started first try wound up like B-29 garage took off out vise like wings thing actually flew two short feet between vise stomach straight arrow saw slow mo tion just like movies no time move cut causing three lacerations took eight stitches close Luckily wife home staggered house thought shot Thats bad looked blood everywhere luck completely bad day because prior starting engine noticed fiberglass propeller sharp knife Through force habit sanded edges smooth shudder think bad would have done hope will help keep other mod elers trying stunt Transmitter power switches Another topic October 89 column drew some mail story about crash Bob Bingamans Flying Quaker due transmitter being inadvertently Continued page 20 ota timer perfectly proportioned modeling Curtiss Robin 049 EngInes -Channel R/C 41 WIngspan ElectrIc Power Optional o oa Very leon lu/I scale aircraft ideally suited model flight s appealing old curt/os Robin born spruce linen age beautil,lly proportioned tar rubber electric glow engines Easy fun build tralnerlike perfarnance Flyline Models caleb8 508 PhOne 170312736693 FLYLINE MODELS INC 7PO Boa 2136 Pslrfax VIrgInIa 22031 LiSA TO YOUR LOCAL WIMT7I~ HOBBY SHOP GUN7 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE Cell 006 745 6394 10am 6pm Central Time BLUES CA getting down get protected CA mask Safety Plus mask will eliminate CA fumes epoxy polyester resin vapors air breath Lightweight easy breathing comfortable CA Mask $1595 Paint Mask $2045 See hobby dealer first doesnt have what need order direct Safety Plus PO Box 1173 Dept 12M Clinton Mississippi 39056 Call toll free 1-800-842-7233 Mississippi dial 601-924-9640 VISA MASTERCARD accepted COD add $250 shipping handling included Dealer Inquiries Invited PLU5 18 Model Aviation bust completely finished authentically detailed poseable 1/8 scale Ifl 90 unirprmxaas 12091224-4170 p 0 box 5631trosno Co 93755 turned off Bob mistook on/off switch Airtronics Vanguard transmit ter throttle trim lever asked modelers send thoughts design transmitter switches letter re sponding request came North Dakota modeler Frank Cudworth re ported similar experience Futaba 5UAP PCM trans mitter Another letter subject Mrs An drea Belk Sac ramento CA has solution problem have Vanguard transmitter An drea wrote Septem ber 89 issue Model Builder magazine product review Vanguard PCM radio author Stu Rich mond addresses problem ac cidental shutoff points out special feature radio transmit ter on/off switch actuator front ra dio can re moved reveal recessed switch transmitter case external actuator switch may left off user chooses thus preventing ac cidentally switch ing off transmit ter Mr Richmond spoke Cliff Weirick Airtron ics Cliff pointed out fea ture Van guard transmitter Perhaps fea ture available other models well isnt should Maybe can research get ball rolling response Andreas suggestion get ball rolling ask radio manu facturer/importer may read col umn give some serious consideration type location transmitter on/off switches currently being used prod uct Could transmitter inadvertently turned off due mistaking its on/off switch trim lever change its de sign and/or location Connectors Another letter also mentioned transmitter switch problem zeroed problem servo bat tery pack connectors Bjorn Hammarskjold will shortly returnlntrodudng Zap Zap-a-Gap Quarter Pounders Four ounces worlds finest adhesives suggested retail price $1895 Available now better hobby stores everywhere House Balsa House Balsa 20130 State Road Cerritos California 90701 213 860-1276 toboit Frank Tlano Enterprises Robart 2460 SW 85th Terrace 310 North 5th Street Davie Florida 33324St Charles lllinola 60174 305 473-2211 5847616 Manufactured Pacer rechnology Rancho Cucamonga CA contact has problems looked cause found contacts corrodedthis after /2 years too much use remedy problem now have parallel receiver contacts added male 15-pin D-sub connector model have soldered servos fe male 15-pin D sub connector connectors gold plated dont corrode means change re ceiver plane have disconnect just polarized plug always know have servos cor rectly connected exactly first installed re ceiver plane have used sys tem some years back Sweden works fine always make sure preflight check ensure wires con nected importance preflight check has dis cussed previous Safety columns However following tale Granby MA modeler Doug Macbrien points out have pay attention perform such check 'On Saturday night rigging up another model use same transmitter use favor ite Giant use aileron servo-reversing switch tired finished forgot put ing Sweden native country after aswitch back its normal position two-year stay US postdoctoralThe next morning took Giant modstudent biochemistry Bjorn reported theel field went through hurried following problem solutionpreflight check wiggled sticks did dont always get signal thenot observe whether controls moved servos plug servo contacts receiver Sometimes batteryContinued page 22 20 Model Aviation ZP QUARTER POUNDERS correct direction Immediately after takeoff model started turn left tried correct turned steep ly immediately realized what Id done youve never tried fly model reversed ailerons wont able ap preciate difficult skill ac quired over 10 years RC modeling didnt bit good like being novice first flight Within about 30 seconds rolled model done split S crashed full throttle bush es Luckily no parked cars cause earlyand shudder think what might have happened spectators 'With transmitters out servo-reversing switches vital check controls proper di rection before flight agree both Bjorn Doug Al ways perform preflight check before takeoff ensure correct control function Also will see next letter al ways check trim levers transmit ter time retrieve im pound area Children flying field obvious reasons will see writer next account will remain anonymous As avid RCer years wife would like admit Ive seen problem develop club think needs addressed opinion would appreciated con cerns might take note act accordingly see column national magazine club belong has exis tence about five years has few members have kids toddler age group However member partic ular allows kids roam free around flight line pit area members wife often accompanies him flying field kids sit pay no tention safety annoyance other members roam around totally unsupervised occasion member physically pick up youngest child seat child mother tell mother didnt come out fly ing field babysit another occasion children picked up transmitter changed set ting several trim levers might guess surprise awaiting its owner next takeoff Apparently someone must have com plained club member father kids club officer cause recent meeting got up soapbox declared felt kids safer flight line side anywhere else field nobody said anything response statement dont believe everyone $999$749$729$689$599$150 $1152$864$841$772$691$212 ________ $1288$965$939$862$772$266 _______ $1372$1029$1002$919$823$301 _______ $1459$1094$1065$977$876$336 _______ RED MAX RACING FUEL Trophy winner planes boats & cars two boat blends castor ok up 40% nitro RED MAX20$1775$1332$1296$1190$1065 $464 REDMAX2S$1965$1474$1435$1317$1179 $541 RED MAX4O$2539$1905$1894$1701$1524 $774 RED MAX 50$2922$2192$2133$1958$1753 $929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 6593497$2622$2552$2343$209891162 RED MAX 4-CYCLE FUEL Eliminates detonation & kickback 4-cycle engines smoother Idle & power 10-4 CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1166 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1165 $1060 $950$386 RED MAX PERFORMANCE FUEL High flash point heavy oil use tuned pipes ducted fan & other heavy dty app $ Performance$1200$900$876$804$720_____ 10 Performance $1391$1043$1016$922$835_______ iSPerlormance $1583 $1187 $1155 $1060 $950_______ RED MAX PATTERN FUEL Proven best fuel pettsrn engines using pumps tuned pipes 5 Pattern$1198$ 895 $ 870 $ 795 $695________ 10 Pattern$1375$1035 $1009 $ 925 $825_______ iSPattern$1575 $1175 $1145 $1050 $940_______ SUPER TIGER 3000 FUEL Beet fuel Super Tiger 2000-4000 engines .......SuperTiger3000 $1288 $965 $939 $862 $772 RED MAX DIESEL FUEL Superior diesel back list popular demand customers Ball Bearings91767 $1326 $1260 $11 84 $1050________ DieedFlaiiBesings$1867$1426$1360$1294$1160 $225 _________ $299 _________ $375 ________ $266 Power easy starting power Smooth take off s power intricate maneuvers Red MaX makes engine come alive power performance never expected can have power Its phone call away Power today next week next year Red Maxs secret gredients keep engine last ing longer running power fully other 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics other fuel 22 Model Aviation Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL IN OTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free pit gals No hand ling charge Freight collect drums Deduct 3% prepay Mix ply Total pW deter mines price SC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD COD add $2 per cartoni Personal checks may held until cleared OTYFUEL1 GAL 4 GAL 24 GAL 60 GAL 120 Gal ordered MIXTURE RUMAMT RED MAX PREMIUM FUELGAL TOTAL $ fuel beginners ft sport flyers should use Avail synthetic castor blend RED MAX 0 RED MAX S RED MAX 10 RED MAX 12 RED MAX 15 RED MAX FUEL Continued page 135 $231 _________ $309 ___ $396___ Grand Total SMOKER FLUID beat smoker fluid 2 4 cycle engines Smoker Fluid$1265 $965 $939 $862 $772$261 CUSTOM BLENDED FUEL INGRDIENTS Available type engine use Cell price Mm gallon boats-cars-hellcopterssoeedoetternscala/ scaiskavan-ianieirinsntMi PLEASE PRINT BOX STRE FT CITY TATF 71P CARD TYPE AND NO EXPIRAl NI TE SR Battery Packs Make Clean Sweep 89 KRC Electric Fly! Saturday Sunday September 16 17 10th annual KRC Electric Fly held Quakertown PA year two different types endurance events held Saturday Sunday Although weather miserable Saturday up last down event held 12 contestants participated four top finishers using SR packs First place won using SR 1250 Series Magnum pack second place won using SR 1250 Series Magnum pack third place won using SR 1800 Series Magnum pack fourth place won using SR 900 Series Max pack Sunday weather much better different type endurance event held Instead simply longest possible flight contestant made series 4 minute flights 2 minute period between flights retrieve planes allowed recharge change battery packs between flights contestant logged highest number 4 minute flights plus number seconds last flight won objective minimize affect thermals outcome event again SR Battery packs made clean sweep event First place won using SR 1250 Series Magnum pack second place won using SR 1000 Series Max pack third place won using SR 1250 Series Magnum pack As can see comes Electric Power battery packs SR Packs cant beat Two years ago SR recognized need series cells designed exclusively electric flier new series would have give electric fliers longest possible motor runs lowest possible weight new SR Magnum Series cells outgrowth research development Magnum Series cells pack 40% 50% capacity cell increasing its size weight Magnum cells primarily designed Sport applications maximum current load 12 15 amps intermittent applications SRs EP Max Pack Cells other hand designed lowest possible internal impedance could handle extremely high current loads continuous discharge rates 15 30 amps SR Max Pack cells best choice rather Magnum cells addition Electric Flight battery packs SR now Stop source Electric Flight supplies SR now stocks motors props chargers wire connectors switches just about anything else might need Electric Flight addition everyone SR will too happy answer questions help solve problems might have place order ask question can reach us calling Hotline 516-286-0079 between 9am 5pm Monday through Friday youd like us send literature send self addressed business size envelope 50 cents postage SR Batteries Inc Box 287 Bellport NY 11713 -ADVERTISEMENTSafety/Preston Continued page 22 agreed way thinking Back May 1980 Safety column published list flying field rules compiled rules differ ent clubs list contained 43 different rules intention clubs should select believed applied operations list did ad dress pets Rule #39 Pets shall con fined spectator area did specifically address kids However two rules applying adults seem equally appropriate kids Rule #11 Spectators welcome must remain designated area lieve should also apply young chil dren unless escorted parent club member gnated area spectators does include pit area flight line Rule #21 Pilots must stand marked pilots box Only pilots instruc tors spottersare permitted stand pilots box dont believe children toddler age likely qualified pi lots instructors spotters other words dont believe toddlers should permitted flight line So now have opinion right ful place children flying field However please dont misunderstand am very much favor hobby being family affair possible Bring kids flying field means own protection please dont let roam around unsupervised As column points out month accidents hap pen Lets have victims children encourage anyone wishing express different viewpoint concerning issue write Meanwhile lets have safe month Skyvolt/Kopski Continued page 34 ter repinning place add hard /16 x -in leading edge strip top ai leron bottom sheets shown Making sure strip perpendicular surface easily done small blocks pictured spread thin CyA along joint Take care glue blocks process Lightly run felt-tip marking pen over top edge leading edge strip color Using small sanding block tape covering corner edge carefi1ly sand away darkened top edge leading edge strip As maneuver tape-covered corner block bottom sheet-TE joint color disappears youll know leading edge top edge tapered proper angle Its important oversand very front edge strip must remain /4 high Y6 building sur face Fill root end of aileron ta Continued page 138 IA ES MILLS METALS BOOKS PRECISION INSTRUMENTS COMPLETE CATALOG $2 00 1 OUls 0, 4VPDIU FULl Cl S 2100 M So Road Spo oqt old Oh o 45505 mpa 322 8562 January 1990 135 THE WIREMASTER o bender/coder extra large handle bends 118-114 coils 5/ 32-3116 music wire Wire creep eliminated ANTI-KREEP WIRE LOCIV free catalog has hundreds new items free miCro bender offer JCM COMPANY 114 Washington Ter. Waukegan IL 60085 IS* WE BUILD YOUR HELl TEST YOUR HELl YOUR HELl I1- Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION