John Preston___________________________ Safety Comes First pinned props RC Channel/fre quency mixups Would lieve theres no Channel 19 Never fly alone PILOT PROTECTION couple weeks ago interesting telephone conversation JR Griffith down Texas executive committee member Austin RC Club JR called seek opionion concerning con troversial issue has divided clubs mem bers two camps would like ask readers agree response JR Heres story Austin club flies runway 300 feet long 50 feet wide RC pilots located some 60 feet edge runway Recently club installed con crete pads pilots stand project about three inches above ground Apparently pads have caused some damage out-ofcontrol models models ran Some club members want surround concrete pads dirt ramps instead colliding edge pad out-of-control model will merely run up ramp across pad controversy Which better have model strike edge pad stopbut per haps suffer some damage process have model run up dirt ramp surrounding pad doing create hazard pilot may standing pad can probably guess opinion expressed JR Id rather see model damaged con crete pad pilot damaged errant model Whats opinion Id appreciate re spondents describe pilot-protection barriers exist club field pinned props Following publication November 1986 issue MA quoted letter subject pinning props drive washer four-stroke engines received several additional letters subject As might expect writers divided opinions whether props should pinned also divided opinion whether self-locking nut Nylok other brand should used mimimize possibility engine backfires will kick prop entirely off shaft possibly have strike pilot bystander process latter subject Al Evans chose write Al Apex NC stated use nuts nylon inserts retain props model engines No-No support posi tion Al enclosed material Airframe & Powerpant Mechanics General Handbook RULE K sharp stub broken wooden prop took end off modelers thumb almost like nice new No 11 hobby-knife blade could haveand thought follow ing good safety precautions time accident happened Read column special issue Fasteners pub lished Machine Design magazine November 14 1985 A&P handbook states use selflocking nuts joints subject either nut bolts rotation Machine Design recom mends use anaerobic locking adhesive regard latter Al suggests using Loctite 242 color-coded blue available auto parts stores points out product will function properly unless threads prop shaft nut cleaned prior its application opinion self-locking nut may proof-positive preventing prop kicking loose should provide protection against having prop spinning entirely off shaft letter Lyman Slack described propthrowing experience first-generation ex posed valves 075 cu four-stroke engine Ever since incident Lyman has pinned props drive washer used Loctite blue secure prop nut found interesting part Lymans letter incident nothing pinning props locking nuts left him shortened right thumb descirbes follows November 1986 article show safety label referring adjusting needle valve behind what doing day friend during routine engine run purpose setting up everything just right new Scale model before going field test flight friend holding Bucker ground left right behind using three-inch screwdriver adjust idle mixture muffler too close/hot use fingers 91 engine fast idle tip screwdriver vibrated forward rear rotating prop think normally blades would have deflected screwdriver down aft reasons un known screwdriver pulled forward along right thumb As can see Lyman enclosed hub prop photograph Continued page 16 LOOI AT ThAT SEE OW WELL THAT / LoKIN- iJLrr AND AIHESVE HELD TH 7ROP odel Aviation IIII&. . New Breed 1 electronic Sachs/Dolmar Lightest weight ready-to-mount engines C 31 $32500 37- *40000 34- *38000 42- *42000 Includes Shipping & Handling Hardware Kit Sachs 31 points included Includes Shipping Handling Glass body wheel pants cowl foam wIng balsa included Laser built bones$68996 Laser Kit$24996 Laser hardware$3000 extra New two-piece wing conversion$4996 extra Option engines Throttle-coupled spark advance *5000 Features Customized newest German engines parts Muffler t ting Bolts sure Tap Smoke uretor Linkage Ignition Cl-I Electronics 48 Volt Ignition Pack ty Switch lt Hub stor Spark Plugs ar Warranty Faulty Parts Workmanship NEW PROP ADAPTER Byrons 4 3 bladed props Adapter fits Sachs engine 7/8 bolt pattern $3995 plus shipping TG MFGE 857 HIgh Mountain Rd North Haledon NJ 075080201 427-3845 appears elsewhere column JP prop transformed itself #11 X-Acto blade proceeded cut almost throught thumb took half bone instinctively grabbed TX shut down engine buddy loaded field box model van pumping water flush thumb van has sink helped wrap up thumb drove emergency room near home After X-rays bone man called gave options Either could come series operations grafts groin area could complete amputation spot opted latter So now right thumb stops fingernail would normally start As said odds doing everything book accident still hap pened Another case buddy system too just going out engine test run good thing though get 10% discount manicurist subject doing things book adjusting mixture behind prop letter came Scott Reed Greenfield MA Scott drew attention ad tach appeared right middle Safety column December 1986 issue sketch ad shows person determining engines rpm front model persons left arm shown just fractions inch rotating prop person holds model Scott asks come ad right middle column Since have nothing layout magazine cannot provide answer Scotts question would have attribute location tach ad Murphys Law last letter subject pinning props using selflocking prop nuts came Missouri modeler wishes remain anony mous modeler experienced shattering pinned prop first 90 four-stroke removed pins eliminated problem shattering props did result slippage prop respect drive washer mod eler describe unusual experience follows running engine dusk evening friendi both noticed static electricity sparks jumpihg around drive washer crankshaft length sparks 1/2 3/4 inch assume static electricity developed propeller slipping turning drive washer and/or prop washer have never seen described before teeth drive washer also ground depression back side wood propeller engine being run block time wonder what would radio reception should occur air Perhaps Radio Technique editior George Myers would interested commenting possible cause radio interference anonymous Missouri modeler also uses Nylok nut stop prop spinning off shaft commented AMA safety require ment either spinner acorn nut cover exposed end shaft glues emery paper rear spinner backplate minimize slip page problems RC channel number verses RC frequency letter West Coast modeler also requesting anonymity contained interesting tale fre quency conflict/shoot down incident occurred AMA-sanctioned contest own words what happened Continued page 18 a1-bIDZOL-5HP34-BIbsZoz-5HP AU Engines Corn piete Nothing Extra Buy 42-5 lbs 3 oz -7 HP 16 Model Aviation WEBRA NOT Clowning around Anymore MODEL AIRPLANE KITS Markss Models Craft Air Models Fly Max Airplanes Irubber powered Bentom Free Flight Telemaster Kits 140 601 Aerocraft Models Bob Martin Graupner Irubber powered kits GraupnerRIC Kits Gliders ENGINES Fox Engines Fox Mufflers Enya Engines Picco Engines BOATS Graupner RIG Boats Graupner Speed Boats BALSA Bulk Packs ACCESSORIES Fox rt Rocket City Sullivan Lak Hobbies Hinges Graupner Props Star Line Porducts Master Air Screw Dave Brown Products Telemaster Accessory Paks Bulk Accessory Paks Graupner Accessory Paks Parts Hunter Off Road Car HELICOPTERS Graupner Hughes 500 D CARS Hunter 184WD Off Road Gas Racer COVERINGS Super Fabric & Superkote Matts Model Building Stockton Drive PO Box 49 Cranbury NJ 08512 609-395-1672 $\}JKYJ UNITED MODEL PRODUCTS has appointed exclusiveengine d istri butor Only UMP brings full line raceproven WEBRA engines backs top-quality commitment service WEBRA UMP way should because comes choice engines serious UJ/M AND UMP division United Model Distributors letter consulted AMA rule book page 127 talked Bob Underwood AMA Technical Director result both cases no Channel 19 other words RC frequency 72080 MHz using should referred 72080 has no designated channel number first flier shot down error stated Channel 19 registered contest new frequencycontrol person also error logging-in transmitter non-existent Channel 19 Similarly CD error permitting fly performing own check determine frequency pin 72080 Brown & White missing Merely shouting Anyone Brown & White opinion satisfactory check Bob Underwood related another incident brought attention similar yours case flier experienced modeler referred frequency its channel number new frequency did have channel number Another flier same fre quency stated actual frequency MHz proceeded fly simultaneoustly shoot-down occurred experienced modeler blamed other flier relative newcomer knowing channel number However appears ex perienced modeler equally blame knowing actual frequency MHz cor responded Channel Number Before leaving subject frequency con flict would like draw attention frequency control board clipboard illus trated page 128 current 1986/1987 AMA rule book An article concerning board Continued page 125 checked contest asked what frequency would flying re sponded 72080 Brown & White Midway through day called fly grabbed plane went get TX no 72080 MHz frequency pin board TX off went pilots box found CD asked what shouted three other fliers Anyone Brown & White received no reply very windy conversation difficult CD asked looked pin pit area told him no avail frankly believed maybe lost pin last time used didnt think anyone else 72080 plane very old very used willing risk being shot down CD said Go ahead fly other fliers turned launched turned prior launching plane heard cry Ive shot down Fortunately hadnt yet launched obvious turned other fliers frequency hit him As turned out checked morning said Channel 19 frequency-control person new did connect 72080 Brown & White Channel 19 just matter time before cards would come up same hat Now questions told frequencies now referred channel numbers no 72080 correct local CD says isnt register contest what correct nomenclature frenquency following response Mr West Coasts questions order respond questions asked 18 Model Aviation resultant repair has stood up entire season flying failure line visible access hole its underside wing Zap makes fuel-proof bond refinishing unneces sary managed keep small repair job small simply thinking about first improvising reaching tool keep access hatch smalland small hole turn posed no threat structural integrity wing Stephen Risik Killeen TX Safety Preston Continued page 18 published January 1984 issue RCM magazine created Jack E Duff Use such board club field contest should eliminate shoot-down incidents addi tion use frequency flags pages 127 128 rule book TX antenna should mandatory requirement both club field contest December issue mentioned incidents engines went full throttle transmit ters turned off letter Lewis Woodward West Palm Beach FL some interesting conunents subject Lewis said Somewhere along course hobby Lewis added PS letter noted engines accelerate full throttle during range check performed TX antenna collapsed can returned idle simply pull ing up antenna However heat situation modelers might think Better have buddy hold model other wise secure prevent motion last tip fly CL models comes Steve Zweidler Elkins Park PA Junior member Steve stated very CL flying attention hazard bystanders may underestimate injury could result being struck flying model use Steves words Dad very important pit-crew go flying together picked clear park away houses used basketball court runway set up started flying few moments later group youngsters six- seven- eight-year olds started play games airplane chasing etc Dad scolded left could still have gotten seriously hurt Continued page 128 FAI RUBBER Sizes 114 3/16 118 3/32 1116 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber ude add $150 UPS Over $15 add 10% NEW e nahher classics P36 props Air Express Mini-Pearl /2A Crocket hooks Front end ammhiles 3 Preg kits Stardlster Satellites winders hardware looks ZONA SAWS famous line hobby saws Razor #200$255 Replacement Blades available dealer Send $100 1986 Catalog FAt Model Suppty P0 Box 3957 Torrance CA 90510 March 1987 125 told check TX range engine idling Letters EditorOn several o&asions engine idling walked away plane check TX Continued page 10range about 10 feet plane engine accelerated plane headed blue yonder occasioll nose plane over order stop discovered ran toward plane engine would return idle dangerous procedure must alert check TX range engine idling safe way have someone else hold plan making range check THE LEADER IN COMPETITION PROPELLERS b6 NEW tL F 4 CYCLE DIAPITCH THP 1266778 136778 146778 1567 16678 PRICE 299 379 479 689 989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 534149 634149 72833456179 8334568189 845667199 9456677199 1045667209 106W8W209 10BEW219 114677775a8229 115W229 116EW239 1167239 124W279 12SW279 1256279 1356349 1456459 1556659 164N969 16678969 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5N279 8677/a6299 SERIES 400C 866777/a289 9777289 W WIDE BLADE EW EXTRA WIDE hI IUARRAW Safety/Preston Continued page 125 sound running model airplane engine seems draw children like magnet possible launch fly CL model using stooge oneself dont recommend helper sometimes difficult keep people straying circle recall another letter received subject related episode CL modeler flying public park lady walk dog straight through circle totally oblivious fact model flying overhead Ive frequently told RC modelers fly alone message applies equally CL modelers Have safe month John Preston 2812 Northampton St N W Washington DC 20015 Heron/Winter Continued page 38 increments Yes may need override stick comforting thought Heron capable gliding back hair-raising distances Approaches difficult dont have large open areas area confined may windup making series wide 360s around yourself However Heron can maneuvered quickly abort go-round observe last climb sluggish side always shut down leaves enough battery capacity least several gorounds Dont belabor last climb thats can get battery too hot experimentally-minded builder encouraged try different motor bat tery combinationsincluding 800 mAh cells various numbers cells Du ration climb glide will different other may better worse depending what plane ball park docile less spectacular LeCrate geared 05 2l fixed 11-7 wood prop 361 Leisure 05 will handle big folders Id start 12-in Master Airscrew folder other good ones case Mabuchi remember comes iron band Robbe Without band expect performance would what landing gear re moved geared Astro Cobalt seven cells 800 mAh capacity its correct prop Herron will come reasonably close competition things like Heron exactly way RC Aerobatics/Van Putte Continued page 41 wont excerpt Editors note information about Competi tion Newsletter section magazine month RMcM Suffice say Nats should much better year Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 Old Timer 2Yk2kAom L5NZOS 8 Gas MODEL 1941 BROOKLYN DODGER 56 Cabin 0NEW65T Retail $52 95INTRODUCTORY PRICEO $3900 1938 Record Bi-eake- 96 $5956 tt3MZipper t9S5356 1938 Kloud King 63 $42 36 1981 Brigidier 56 $4076 1991 super-Quaker 78 5/276 1940 50 Long 55S3036 1936 Buccaneer 89 $0996 1938 Clipper MKI 72$9156 1937 Dallaire 158 575 16 1935 Miss America 84 $7196 1941 Playboy Sr 80 $5116 1991 Playboy Jr 59 $3116 1938 Powerhouse 89 05356 1990 Sailplane 78 $8976 1938 Trenton Terror 32 $40 76 1990 Ranger 96 $3196 1939 Korda Wake 99 $1916 1939 Mercury 72 6 kits qualify SAM events PP & B/C feature highest quality machine cut & sanded ports Superior oil Competition sheet ond strip wood wire & window material Plans orig FF hut models easily convertible 2ch R IC KITS Sailplanes Electric power Gas Hobby Horn SbNSOAR Glider 78 5s $1000 Midway Model GNOME R/G Hand Launch Glider$2900 Jolly Models FLINGER R/G HLG 58 span $2900 Midway Model FAST EDDIE Aerobatic /05 Elec$1908 Jolly Models ELECTRICUS Electric Glider 05s$3258 Leisure PLAYBOY SR 67 Gear 05 Elect $3000 Astro ASTRO SPORT 37 Direct 05 Elect $2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 86 Geared 09 EP $3900 Midway FLYING QUAKER 09 90-959 stroke $6976 9ks/Midway DENNY JR 72 Alsim Cowel $6396 9ks/Midwav BUZZARD BOMBSHELL 72$0196 FULL LINE OF ELECTRIC SYSTEMS 5 Parts Avail slitrriii & HANDLING Up $000 add $150 $001 $2000 add $225 $2001 $9500 add $300 $9501 $7000 add $350 aver $7000 add $900 CA Addressees add 6% law Send MO Visa/MCI#rEapl Check allow up 30 days CK clearance COD Exact Charges pbs $150 Hdl Cash Only 64 Page lasasuuuum $200 PP/tst Class copy will sent free-when requestedwith order HOBBY HORN 15173 Moran St IA PO Bow 2212 Westminster Ca 92609 719 8938311 [Aft Hrs 714 8951203] SERIES lOU THP DESIGN TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW \ / II vnYE Hedge Hoppin Vol 3 Special Feature Warbird Action Tos Model * Action Interviews Scale JETS British Concorde SST * Relmi Ba Con Ira Beginner $07 Mis 49 95 K 2 Ba F gb TansgForBeginners 65Mm 4495 3 Wo Mode 0500 gOMno 449$ QhkohOe em 55Mm3995 5Airplase Fancies 30 Mm Wild3995 6US Scale Masters 60 Mis413$ 7 Warbirds Action 7$ Mis Fantastic499$ 8Hedge HoppinVoll 45Mm419$ 9Whick Way Up 70 Mis Aerobatics4795 lOHedge Hoppin Vol 2 $0 Mm4095 $1 Hedoe Hoppin Vol 3 30 Mm3495 Hedge Hoppin Series Feature Variety Avaia lion Topics Full Scale & Model OrderIng InformatIon Rentals $1495 Rental DeposIt Retail Price Tape Rental DuratIon 7 Days After Delivery K Paymentt Check 10 days M 0 /M C Card # K & Esp Dale Pbone # C 0 D s Available Phone ShIppIng 3 75 Foreign Canada Add 00% Total Otters 15% IL Res Add 7% Tao Academy AvIatIon R & D PO Box 277 Hazel crest IL 60429 5 312 335-0776 Z 128 Model Aviation
Edition: Model Aviation - 1987/03
Page Numbers: 14, 16, 18, 125, 128
John Preston___________________________ Safety Comes First pinned props RC Channel/fre quency mixups Would lieve theres no Channel 19 Never fly alone PILOT PROTECTION couple weeks ago interesting telephone conversation JR Griffith down Texas executive committee member Austin RC Club JR called seek opionion concerning con troversial issue has divided clubs mem bers two camps would like ask readers agree response JR Heres story Austin club flies runway 300 feet long 50 feet wide RC pilots located some 60 feet edge runway Recently club installed con crete pads pilots stand project about three inches above ground Apparently pads have caused some damage out-ofcontrol models models ran Some club members want surround concrete pads dirt ramps instead colliding edge pad out-of-control model will merely run up ramp across pad controversy Which better have model strike edge pad stopbut per haps suffer some damage process have model run up dirt ramp surrounding pad doing create hazard pilot may standing pad can probably guess opinion expressed JR Id rather see model damaged con crete pad pilot damaged errant model Whats opinion Id appreciate re spondents describe pilot-protection barriers exist club field pinned props Following publication November 1986 issue MA quoted letter subject pinning props drive washer four-stroke engines received several additional letters subject As might expect writers divided opinions whether props should pinned also divided opinion whether self-locking nut Nylok other brand should used mimimize possibility engine backfires will kick prop entirely off shaft possibly have strike pilot bystander process latter subject Al Evans chose write Al Apex NC stated use nuts nylon inserts retain props model engines No-No support posi tion Al enclosed material Airframe & Powerpant Mechanics General Handbook RULE K sharp stub broken wooden prop took end off modelers thumb almost like nice new No 11 hobby-knife blade could haveand thought follow ing good safety precautions time accident happened Read column special issue Fasteners pub lished Machine Design magazine November 14 1985 A&P handbook states use selflocking nuts joints subject either nut bolts rotation Machine Design recom mends use anaerobic locking adhesive regard latter Al suggests using Loctite 242 color-coded blue available auto parts stores points out product will function properly unless threads prop shaft nut cleaned prior its application opinion self-locking nut may proof-positive preventing prop kicking loose should provide protection against having prop spinning entirely off shaft letter Lyman Slack described propthrowing experience first-generation ex posed valves 075 cu four-stroke engine Ever since incident Lyman has pinned props drive washer used Loctite blue secure prop nut found interesting part Lymans letter incident nothing pinning props locking nuts left him shortened right thumb descirbes follows November 1986 article show safety label referring adjusting needle valve behind what doing day friend during routine engine run purpose setting up everything just right new Scale model before going field test flight friend holding Bucker ground left right behind using three-inch screwdriver adjust idle mixture muffler too close/hot use fingers 91 engine fast idle tip screwdriver vibrated forward rear rotating prop think normally blades would have deflected screwdriver down aft reasons un known screwdriver pulled forward along right thumb As can see Lyman enclosed hub prop photograph Continued page 16 LOOI AT ThAT SEE OW WELL THAT / LoKIN- iJLrr AND AIHESVE HELD TH 7ROP odel Aviation IIII&. . New Breed 1 electronic Sachs/Dolmar Lightest weight ready-to-mount engines C 31 $32500 37- *40000 34- *38000 42- *42000 Includes Shipping & Handling Hardware Kit Sachs 31 points included Includes Shipping Handling Glass body wheel pants cowl foam wIng balsa included Laser built bones$68996 Laser Kit$24996 Laser hardware$3000 extra New two-piece wing conversion$4996 extra Option engines Throttle-coupled spark advance *5000 Features Customized newest German engines parts Muffler t ting Bolts sure Tap Smoke uretor Linkage Ignition Cl-I Electronics 48 Volt Ignition Pack ty Switch lt Hub stor Spark Plugs ar Warranty Faulty Parts Workmanship NEW PROP ADAPTER Byrons 4 3 bladed props Adapter fits Sachs engine 7/8 bolt pattern $3995 plus shipping TG MFGE 857 HIgh Mountain Rd North Haledon NJ 075080201 427-3845 appears elsewhere column JP prop transformed itself #11 X-Acto blade proceeded cut almost throught thumb took half bone instinctively grabbed TX shut down engine buddy loaded field box model van pumping water flush thumb van has sink helped wrap up thumb drove emergency room near home After X-rays bone man called gave options Either could come series operations grafts groin area could complete amputation spot opted latter So now right thumb stops fingernail would normally start As said odds doing everything book accident still hap pened Another case buddy system too just going out engine test run good thing though get 10% discount manicurist subject doing things book adjusting mixture behind prop letter came Scott Reed Greenfield MA Scott drew attention ad tach appeared right middle Safety column December 1986 issue sketch ad shows person determining engines rpm front model persons left arm shown just fractions inch rotating prop person holds model Scott asks come ad right middle column Since have nothing layout magazine cannot provide answer Scotts question would have attribute location tach ad Murphys Law last letter subject pinning props using selflocking prop nuts came Missouri modeler wishes remain anony mous modeler experienced shattering pinned prop first 90 four-stroke removed pins eliminated problem shattering props did result slippage prop respect drive washer mod eler describe unusual experience follows running engine dusk evening friendi both noticed static electricity sparks jumpihg around drive washer crankshaft length sparks 1/2 3/4 inch assume static electricity developed propeller slipping turning drive washer and/or prop washer have never seen described before teeth drive washer also ground depression back side wood propeller engine being run block time wonder what would radio reception should occur air Perhaps Radio Technique editior George Myers would interested commenting possible cause radio interference anonymous Missouri modeler also uses Nylok nut stop prop spinning off shaft commented AMA safety require ment either spinner acorn nut cover exposed end shaft glues emery paper rear spinner backplate minimize slip page problems RC channel number verses RC frequency letter West Coast modeler also requesting anonymity contained interesting tale fre quency conflict/shoot down incident occurred AMA-sanctioned contest own words what happened Continued page 18 a1-bIDZOL-5HP34-BIbsZoz-5HP AU Engines Corn piete Nothing Extra Buy 42-5 lbs 3 oz -7 HP 16 Model Aviation WEBRA NOT Clowning around Anymore MODEL AIRPLANE KITS Markss Models Craft Air Models Fly Max Airplanes Irubber powered Bentom Free Flight Telemaster Kits 140 601 Aerocraft Models Bob Martin Graupner Irubber powered kits GraupnerRIC Kits Gliders ENGINES Fox Engines Fox Mufflers Enya Engines Picco Engines BOATS Graupner RIG Boats Graupner Speed Boats BALSA Bulk Packs ACCESSORIES Fox rt Rocket City Sullivan Lak Hobbies Hinges Graupner Props Star Line Porducts Master Air Screw Dave Brown Products Telemaster Accessory Paks Bulk Accessory Paks Graupner Accessory Paks Parts Hunter Off Road Car HELICOPTERS Graupner Hughes 500 D CARS Hunter 184WD Off Road Gas Racer COVERINGS Super Fabric & Superkote Matts Model Building Stockton Drive PO Box 49 Cranbury NJ 08512 609-395-1672 $\}JKYJ UNITED MODEL PRODUCTS has appointed exclusiveengine d istri butor Only UMP brings full line raceproven WEBRA engines backs top-quality commitment service WEBRA UMP way should because comes choice engines serious UJ/M AND UMP division United Model Distributors letter consulted AMA rule book page 127 talked Bob Underwood AMA Technical Director result both cases no Channel 19 other words RC frequency 72080 MHz using should referred 72080 has no designated channel number first flier shot down error stated Channel 19 registered contest new frequencycontrol person also error logging-in transmitter non-existent Channel 19 Similarly CD error permitting fly performing own check determine frequency pin 72080 Brown & White missing Merely shouting Anyone Brown & White opinion satisfactory check Bob Underwood related another incident brought attention similar yours case flier experienced modeler referred frequency its channel number new frequency did have channel number Another flier same fre quency stated actual frequency MHz proceeded fly simultaneoustly shoot-down occurred experienced modeler blamed other flier relative newcomer knowing channel number However appears ex perienced modeler equally blame knowing actual frequency MHz cor responded Channel Number Before leaving subject frequency con flict would like draw attention frequency control board clipboard illus trated page 128 current 1986/1987 AMA rule book An article concerning board Continued page 125 checked contest asked what frequency would flying re sponded 72080 Brown & White Midway through day called fly grabbed plane went get TX no 72080 MHz frequency pin board TX off went pilots box found CD asked what shouted three other fliers Anyone Brown & White received no reply very windy conversation difficult CD asked looked pin pit area told him no avail frankly believed maybe lost pin last time used didnt think anyone else 72080 plane very old very used willing risk being shot down CD said Go ahead fly other fliers turned launched turned prior launching plane heard cry Ive shot down Fortunately hadnt yet launched obvious turned other fliers frequency hit him As turned out checked morning said Channel 19 frequency-control person new did connect 72080 Brown & White Channel 19 just matter time before cards would come up same hat Now questions told frequencies now referred channel numbers no 72080 correct local CD says isnt register contest what correct nomenclature frenquency following response Mr West Coasts questions order respond questions asked 18 Model Aviation resultant repair has stood up entire season flying failure line visible access hole its underside wing Zap makes fuel-proof bond refinishing unneces sary managed keep small repair job small simply thinking about first improvising reaching tool keep access hatch smalland small hole turn posed no threat structural integrity wing Stephen Risik Killeen TX Safety Preston Continued page 18 published January 1984 issue RCM magazine created Jack E Duff Use such board club field contest should eliminate shoot-down incidents addi tion use frequency flags pages 127 128 rule book TX antenna should mandatory requirement both club field contest December issue mentioned incidents engines went full throttle transmit ters turned off letter Lewis Woodward West Palm Beach FL some interesting conunents subject Lewis said Somewhere along course hobby Lewis added PS letter noted engines accelerate full throttle during range check performed TX antenna collapsed can returned idle simply pull ing up antenna However heat situation modelers might think Better have buddy hold model other wise secure prevent motion last tip fly CL models comes Steve Zweidler Elkins Park PA Junior member Steve stated very CL flying attention hazard bystanders may underestimate injury could result being struck flying model use Steves words Dad very important pit-crew go flying together picked clear park away houses used basketball court runway set up started flying few moments later group youngsters six- seven- eight-year olds started play games airplane chasing etc Dad scolded left could still have gotten seriously hurt Continued page 128 FAI RUBBER Sizes 114 3/16 118 3/32 1116 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber ude add $150 UPS Over $15 add 10% NEW e nahher classics P36 props Air Express Mini-Pearl /2A Crocket hooks Front end ammhiles 3 Preg kits Stardlster Satellites winders hardware looks ZONA SAWS famous line hobby saws Razor #200$255 Replacement Blades available dealer Send $100 1986 Catalog FAt Model Suppty P0 Box 3957 Torrance CA 90510 March 1987 125 told check TX range engine idling Letters EditorOn several o&asions engine idling walked away plane check TX Continued page 10range about 10 feet plane engine accelerated plane headed blue yonder occasioll nose plane over order stop discovered ran toward plane engine would return idle dangerous procedure must alert check TX range engine idling safe way have someone else hold plan making range check THE LEADER IN COMPETITION PROPELLERS b6 NEW tL F 4 CYCLE DIAPITCH THP 1266778 136778 146778 1567 16678 PRICE 299 379 479 689 989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 534149 634149 72833456179 8334568189 845667199 9456677199 1045667209 106W8W209 10BEW219 114677775a8229 115W229 116EW239 1167239 124W279 12SW279 1256279 1356349 1456459 1556659 164N969 16678969 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5N279 8677/a6299 SERIES 400C 866777/a289 9777289 W WIDE BLADE EW EXTRA WIDE hI IUARRAW Safety/Preston Continued page 125 sound running model airplane engine seems draw children like magnet possible launch fly CL model using stooge oneself dont recommend helper sometimes difficult keep people straying circle recall another letter received subject related episode CL modeler flying public park lady walk dog straight through circle totally oblivious fact model flying overhead Ive frequently told RC modelers fly alone message applies equally CL modelers Have safe month John Preston 2812 Northampton St N W Washington DC 20015 Heron/Winter Continued page 38 increments Yes may need override stick comforting thought Heron capable gliding back hair-raising distances Approaches difficult dont have large open areas area confined may windup making series wide 360s around yourself However Heron can maneuvered quickly abort go-round observe last climb sluggish side always shut down leaves enough battery capacity least several gorounds Dont belabor last climb thats can get battery too hot experimentally-minded builder encouraged try different motor bat tery combinationsincluding 800 mAh cells various numbers cells Du ration climb glide will different other may better worse depending what plane ball park docile less spectacular LeCrate geared 05 2l fixed 11-7 wood prop 361 Leisure 05 will handle big folders Id start 12-in Master Airscrew folder other good ones case Mabuchi remember comes iron band Robbe Without band expect performance would what landing gear re moved geared Astro Cobalt seven cells 800 mAh capacity its correct prop Herron will come reasonably close competition things like Heron exactly way RC Aerobatics/Van Putte Continued page 41 wont excerpt Editors note information about Competi tion Newsletter section magazine month RMcM Suffice say Nats should much better year Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 Old Timer 2Yk2kAom L5NZOS 8 Gas MODEL 1941 BROOKLYN DODGER 56 Cabin 0NEW65T Retail $52 95INTRODUCTORY PRICEO $3900 1938 Record Bi-eake- 96 $5956 tt3MZipper t9S5356 1938 Kloud King 63 $42 36 1981 Brigidier 56 $4076 1991 super-Quaker 78 5/276 1940 50 Long 55S3036 1936 Buccaneer 89 $0996 1938 Clipper MKI 72$9156 1937 Dallaire 158 575 16 1935 Miss America 84 $7196 1941 Playboy Sr 80 $5116 1991 Playboy Jr 59 $3116 1938 Powerhouse 89 05356 1990 Sailplane 78 $8976 1938 Trenton Terror 32 $40 76 1990 Ranger 96 $3196 1939 Korda Wake 99 $1916 1939 Mercury 72 6 kits qualify SAM events PP & B/C feature highest quality machine cut & sanded ports Superior oil Competition sheet ond strip wood wire & window material Plans orig FF hut models easily convertible 2ch R IC KITS Sailplanes Electric power Gas Hobby Horn SbNSOAR Glider 78 5s $1000 Midway Model GNOME R/G Hand Launch Glider$2900 Jolly Models FLINGER R/G HLG 58 span $2900 Midway Model FAST EDDIE Aerobatic /05 Elec$1908 Jolly Models ELECTRICUS Electric Glider 05s$3258 Leisure PLAYBOY SR 67 Gear 05 Elect $3000 Astro ASTRO SPORT 37 Direct 05 Elect $2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 86 Geared 09 EP $3900 Midway FLYING QUAKER 09 90-959 stroke $6976 9ks/Midway DENNY JR 72 Alsim Cowel $6396 9ks/Midwav BUZZARD BOMBSHELL 72$0196 FULL LINE OF ELECTRIC SYSTEMS 5 Parts Avail slitrriii & HANDLING Up $000 add $150 $001 $2000 add $225 $2001 $9500 add $300 $9501 $7000 add $350 aver $7000 add $900 CA Addressees add 6% law Send MO Visa/MCI#rEapl Check allow up 30 days CK clearance COD Exact Charges pbs $150 Hdl Cash Only 64 Page lasasuuuum $200 PP/tst Class copy will sent free-when requestedwith order HOBBY HORN 15173 Moran St IA PO Bow 2212 Westminster Ca 92609 719 8938311 [Aft Hrs 714 8951203] SERIES lOU THP DESIGN TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW \ / II vnYE Hedge Hoppin Vol 3 Special Feature Warbird Action Tos Model * Action Interviews Scale JETS British Concorde SST * Relmi Ba Con Ira Beginner $07 Mis 49 95 K 2 Ba F gb TansgForBeginners 65Mm 4495 3 Wo Mode 0500 gOMno 449$ QhkohOe em 55Mm3995 5Airplase Fancies 30 Mm Wild3995 6US Scale Masters 60 Mis413$ 7 Warbirds Action 7$ Mis Fantastic499$ 8Hedge HoppinVoll 45Mm419$ 9Whick Way Up 70 Mis Aerobatics4795 lOHedge Hoppin Vol 2 $0 Mm4095 $1 Hedoe Hoppin Vol 3 30 Mm3495 Hedge Hoppin Series Feature Variety Avaia lion Topics Full Scale & Model OrderIng InformatIon Rentals $1495 Rental DeposIt Retail Price Tape Rental DuratIon 7 Days After Delivery K Paymentt Check 10 days M 0 /M C Card # K & Esp Dale Pbone # C 0 D s Available Phone ShIppIng 3 75 Foreign Canada Add 00% Total Otters 15% IL Res Add 7% Tao Academy AvIatIon R & D PO Box 277 Hazel crest IL 60429 5 312 335-0776 Z 128 Model Aviation
Edition: Model Aviation - 1987/03
Page Numbers: 14, 16, 18, 125, 128
John Preston___________________________ Safety Comes First pinned props RC Channel/fre quency mixups Would lieve theres no Channel 19 Never fly alone PILOT PROTECTION couple weeks ago interesting telephone conversation JR Griffith down Texas executive committee member Austin RC Club JR called seek opionion concerning con troversial issue has divided clubs mem bers two camps would like ask readers agree response JR Heres story Austin club flies runway 300 feet long 50 feet wide RC pilots located some 60 feet edge runway Recently club installed con crete pads pilots stand project about three inches above ground Apparently pads have caused some damage out-ofcontrol models models ran Some club members want surround concrete pads dirt ramps instead colliding edge pad out-of-control model will merely run up ramp across pad controversy Which better have model strike edge pad stopbut per haps suffer some damage process have model run up dirt ramp surrounding pad doing create hazard pilot may standing pad can probably guess opinion expressed JR Id rather see model damaged con crete pad pilot damaged errant model Whats opinion Id appreciate re spondents describe pilot-protection barriers exist club field pinned props Following publication November 1986 issue MA quoted letter subject pinning props drive washer four-stroke engines received several additional letters subject As might expect writers divided opinions whether props should pinned also divided opinion whether self-locking nut Nylok other brand should used mimimize possibility engine backfires will kick prop entirely off shaft possibly have strike pilot bystander process latter subject Al Evans chose write Al Apex NC stated use nuts nylon inserts retain props model engines No-No support posi tion Al enclosed material Airframe & Powerpant Mechanics General Handbook RULE K sharp stub broken wooden prop took end off modelers thumb almost like nice new No 11 hobby-knife blade could haveand thought follow ing good safety precautions time accident happened Read column special issue Fasteners pub lished Machine Design magazine November 14 1985 A&P handbook states use selflocking nuts joints subject either nut bolts rotation Machine Design recom mends use anaerobic locking adhesive regard latter Al suggests using Loctite 242 color-coded blue available auto parts stores points out product will function properly unless threads prop shaft nut cleaned prior its application opinion self-locking nut may proof-positive preventing prop kicking loose should provide protection against having prop spinning entirely off shaft letter Lyman Slack described propthrowing experience first-generation ex posed valves 075 cu four-stroke engine Ever since incident Lyman has pinned props drive washer used Loctite blue secure prop nut found interesting part Lymans letter incident nothing pinning props locking nuts left him shortened right thumb descirbes follows November 1986 article show safety label referring adjusting needle valve behind what doing day friend during routine engine run purpose setting up everything just right new Scale model before going field test flight friend holding Bucker ground left right behind using three-inch screwdriver adjust idle mixture muffler too close/hot use fingers 91 engine fast idle tip screwdriver vibrated forward rear rotating prop think normally blades would have deflected screwdriver down aft reasons un known screwdriver pulled forward along right thumb As can see Lyman enclosed hub prop photograph Continued page 16 LOOI AT ThAT SEE OW WELL THAT / LoKIN- iJLrr AND AIHESVE HELD TH 7ROP odel Aviation IIII&. . New Breed 1 electronic Sachs/Dolmar Lightest weight ready-to-mount engines C 31 $32500 37- *40000 34- *38000 42- *42000 Includes Shipping & Handling Hardware Kit Sachs 31 points included Includes Shipping Handling Glass body wheel pants cowl foam wIng balsa included Laser built bones$68996 Laser Kit$24996 Laser hardware$3000 extra New two-piece wing conversion$4996 extra Option engines Throttle-coupled spark advance *5000 Features Customized newest German engines parts Muffler t ting Bolts sure Tap Smoke uretor Linkage Ignition Cl-I Electronics 48 Volt Ignition Pack ty Switch lt Hub stor Spark Plugs ar Warranty Faulty Parts Workmanship NEW PROP ADAPTER Byrons 4 3 bladed props Adapter fits Sachs engine 7/8 bolt pattern $3995 plus shipping TG MFGE 857 HIgh Mountain Rd North Haledon NJ 075080201 427-3845 appears elsewhere column JP prop transformed itself #11 X-Acto blade proceeded cut almost throught thumb took half bone instinctively grabbed TX shut down engine buddy loaded field box model van pumping water flush thumb van has sink helped wrap up thumb drove emergency room near home After X-rays bone man called gave options Either could come series operations grafts groin area could complete amputation spot opted latter So now right thumb stops fingernail would normally start As said odds doing everything book accident still hap pened Another case buddy system too just going out engine test run good thing though get 10% discount manicurist subject doing things book adjusting mixture behind prop letter came Scott Reed Greenfield MA Scott drew attention ad tach appeared right middle Safety column December 1986 issue sketch ad shows person determining engines rpm front model persons left arm shown just fractions inch rotating prop person holds model Scott asks come ad right middle column Since have nothing layout magazine cannot provide answer Scotts question would have attribute location tach ad Murphys Law last letter subject pinning props using selflocking prop nuts came Missouri modeler wishes remain anony mous modeler experienced shattering pinned prop first 90 four-stroke removed pins eliminated problem shattering props did result slippage prop respect drive washer mod eler describe unusual experience follows running engine dusk evening friendi both noticed static electricity sparks jumpihg around drive washer crankshaft length sparks 1/2 3/4 inch assume static electricity developed propeller slipping turning drive washer and/or prop washer have never seen described before teeth drive washer also ground depression back side wood propeller engine being run block time wonder what would radio reception should occur air Perhaps Radio Technique editior George Myers would interested commenting possible cause radio interference anonymous Missouri modeler also uses Nylok nut stop prop spinning off shaft commented AMA safety require ment either spinner acorn nut cover exposed end shaft glues emery paper rear spinner backplate minimize slip page problems RC channel number verses RC frequency letter West Coast modeler also requesting anonymity contained interesting tale fre quency conflict/shoot down incident occurred AMA-sanctioned contest own words what happened Continued page 18 a1-bIDZOL-5HP34-BIbsZoz-5HP AU Engines Corn piete Nothing Extra Buy 42-5 lbs 3 oz -7 HP 16 Model Aviation WEBRA NOT Clowning around Anymore MODEL AIRPLANE KITS Markss Models Craft Air Models Fly Max Airplanes Irubber powered Bentom Free Flight Telemaster Kits 140 601 Aerocraft Models Bob Martin Graupner Irubber powered kits GraupnerRIC Kits Gliders ENGINES Fox Engines Fox Mufflers Enya Engines Picco Engines BOATS Graupner RIG Boats Graupner Speed Boats BALSA Bulk Packs ACCESSORIES Fox rt Rocket City Sullivan Lak Hobbies Hinges Graupner Props Star Line Porducts Master Air Screw Dave Brown Products Telemaster Accessory Paks Bulk Accessory Paks Graupner Accessory Paks Parts Hunter Off Road Car HELICOPTERS Graupner Hughes 500 D CARS Hunter 184WD Off Road Gas Racer COVERINGS Super Fabric & Superkote Matts Model Building Stockton Drive PO Box 49 Cranbury NJ 08512 609-395-1672 $\}JKYJ UNITED MODEL PRODUCTS has appointed exclusiveengine d istri butor Only UMP brings full line raceproven WEBRA engines backs top-quality commitment service WEBRA UMP way should because comes choice engines serious UJ/M AND UMP division United Model Distributors letter consulted AMA rule book page 127 talked Bob Underwood AMA Technical Director result both cases no Channel 19 other words RC frequency 72080 MHz using should referred 72080 has no designated channel number first flier shot down error stated Channel 19 registered contest new frequencycontrol person also error logging-in transmitter non-existent Channel 19 Similarly CD error permitting fly performing own check determine frequency pin 72080 Brown & White missing Merely shouting Anyone Brown & White opinion satisfactory check Bob Underwood related another incident brought attention similar yours case flier experienced modeler referred frequency its channel number new frequency did have channel number Another flier same fre quency stated actual frequency MHz proceeded fly simultaneoustly shoot-down occurred experienced modeler blamed other flier relative newcomer knowing channel number However appears ex perienced modeler equally blame knowing actual frequency MHz cor responded Channel Number Before leaving subject frequency con flict would like draw attention frequency control board clipboard illus trated page 128 current 1986/1987 AMA rule book An article concerning board Continued page 125 checked contest asked what frequency would flying re sponded 72080 Brown & White Midway through day called fly grabbed plane went get TX no 72080 MHz frequency pin board TX off went pilots box found CD asked what shouted three other fliers Anyone Brown & White received no reply very windy conversation difficult CD asked looked pin pit area told him no avail frankly believed maybe lost pin last time used didnt think anyone else 72080 plane very old very used willing risk being shot down CD said Go ahead fly other fliers turned launched turned prior launching plane heard cry Ive shot down Fortunately hadnt yet launched obvious turned other fliers frequency hit him As turned out checked morning said Channel 19 frequency-control person new did connect 72080 Brown & White Channel 19 just matter time before cards would come up same hat Now questions told frequencies now referred channel numbers no 72080 correct local CD says isnt register contest what correct nomenclature frenquency following response Mr West Coasts questions order respond questions asked 18 Model Aviation resultant repair has stood up entire season flying failure line visible access hole its underside wing Zap makes fuel-proof bond refinishing unneces sary managed keep small repair job small simply thinking about first improvising reaching tool keep access hatch smalland small hole turn posed no threat structural integrity wing Stephen Risik Killeen TX Safety Preston Continued page 18 published January 1984 issue RCM magazine created Jack E Duff Use such board club field contest should eliminate shoot-down incidents addi tion use frequency flags pages 127 128 rule book TX antenna should mandatory requirement both club field contest December issue mentioned incidents engines went full throttle transmit ters turned off letter Lewis Woodward West Palm Beach FL some interesting conunents subject Lewis said Somewhere along course hobby Lewis added PS letter noted engines accelerate full throttle during range check performed TX antenna collapsed can returned idle simply pull ing up antenna However heat situation modelers might think Better have buddy hold model other wise secure prevent motion last tip fly CL models comes Steve Zweidler Elkins Park PA Junior member Steve stated very CL flying attention hazard bystanders may underestimate injury could result being struck flying model use Steves words Dad very important pit-crew go flying together picked clear park away houses used basketball court runway set up started flying few moments later group youngsters six- seven- eight-year olds started play games airplane chasing etc Dad scolded left could still have gotten seriously hurt Continued page 128 FAI RUBBER Sizes 114 3/16 118 3/32 1116 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber ude add $150 UPS Over $15 add 10% NEW e nahher classics P36 props Air Express Mini-Pearl /2A Crocket hooks Front end ammhiles 3 Preg kits Stardlster Satellites winders hardware looks ZONA SAWS famous line hobby saws Razor #200$255 Replacement Blades available dealer Send $100 1986 Catalog FAt Model Suppty P0 Box 3957 Torrance CA 90510 March 1987 125 told check TX range engine idling Letters EditorOn several o&asions engine idling walked away plane check TX Continued page 10range about 10 feet plane engine accelerated plane headed blue yonder occasioll nose plane over order stop discovered ran toward plane engine would return idle dangerous procedure must alert check TX range engine idling safe way have someone else hold plan making range check THE LEADER IN COMPETITION PROPELLERS b6 NEW tL F 4 CYCLE DIAPITCH THP 1266778 136778 146778 1567 16678 PRICE 299 379 479 689 989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 534149 634149 72833456179 8334568189 845667199 9456677199 1045667209 106W8W209 10BEW219 114677775a8229 115W229 116EW239 1167239 124W279 12SW279 1256279 1356349 1456459 1556659 164N969 16678969 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5N279 8677/a6299 SERIES 400C 866777/a289 9777289 W WIDE BLADE EW EXTRA WIDE hI IUARRAW Safety/Preston Continued page 125 sound running model airplane engine seems draw children like magnet possible launch fly CL model using stooge oneself dont recommend helper sometimes difficult keep people straying circle recall another letter received subject related episode CL modeler flying public park lady walk dog straight through circle totally oblivious fact model flying overhead Ive frequently told RC modelers fly alone message applies equally CL modelers Have safe month John Preston 2812 Northampton St N W Washington DC 20015 Heron/Winter Continued page 38 increments Yes may need override stick comforting thought Heron capable gliding back hair-raising distances Approaches difficult dont have large open areas area confined may windup making series wide 360s around yourself However Heron can maneuvered quickly abort go-round observe last climb sluggish side always shut down leaves enough battery capacity least several gorounds Dont belabor last climb thats can get battery too hot experimentally-minded builder encouraged try different motor bat tery combinationsincluding 800 mAh cells various numbers cells Du ration climb glide will different other may better worse depending what plane ball park docile less spectacular LeCrate geared 05 2l fixed 11-7 wood prop 361 Leisure 05 will handle big folders Id start 12-in Master Airscrew folder other good ones case Mabuchi remember comes iron band Robbe Without band expect performance would what landing gear re moved geared Astro Cobalt seven cells 800 mAh capacity its correct prop Herron will come reasonably close competition things like Heron exactly way RC Aerobatics/Van Putte Continued page 41 wont excerpt Editors note information about Competi tion Newsletter section magazine month RMcM Suffice say Nats should much better year Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 Old Timer 2Yk2kAom L5NZOS 8 Gas MODEL 1941 BROOKLYN DODGER 56 Cabin 0NEW65T Retail $52 95INTRODUCTORY PRICEO $3900 1938 Record Bi-eake- 96 $5956 tt3MZipper t9S5356 1938 Kloud King 63 $42 36 1981 Brigidier 56 $4076 1991 super-Quaker 78 5/276 1940 50 Long 55S3036 1936 Buccaneer 89 $0996 1938 Clipper MKI 72$9156 1937 Dallaire 158 575 16 1935 Miss America 84 $7196 1941 Playboy Sr 80 $5116 1991 Playboy Jr 59 $3116 1938 Powerhouse 89 05356 1990 Sailplane 78 $8976 1938 Trenton Terror 32 $40 76 1990 Ranger 96 $3196 1939 Korda Wake 99 $1916 1939 Mercury 72 6 kits qualify SAM events PP & B/C feature highest quality machine cut & sanded ports Superior oil Competition sheet ond strip wood wire & window material Plans orig FF hut models easily convertible 2ch R IC KITS Sailplanes Electric power Gas Hobby Horn SbNSOAR Glider 78 5s $1000 Midway Model GNOME R/G Hand Launch Glider$2900 Jolly Models FLINGER R/G HLG 58 span $2900 Midway Model FAST EDDIE Aerobatic /05 Elec$1908 Jolly Models ELECTRICUS Electric Glider 05s$3258 Leisure PLAYBOY SR 67 Gear 05 Elect $3000 Astro ASTRO SPORT 37 Direct 05 Elect $2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 86 Geared 09 EP $3900 Midway FLYING QUAKER 09 90-959 stroke $6976 9ks/Midway DENNY JR 72 Alsim Cowel $6396 9ks/Midwav BUZZARD BOMBSHELL 72$0196 FULL LINE OF ELECTRIC SYSTEMS 5 Parts Avail slitrriii & HANDLING Up $000 add $150 $001 $2000 add $225 $2001 $9500 add $300 $9501 $7000 add $350 aver $7000 add $900 CA Addressees add 6% law Send MO Visa/MCI#rEapl Check allow up 30 days CK clearance COD Exact Charges pbs $150 Hdl Cash Only 64 Page lasasuuuum $200 PP/tst Class copy will sent free-when requestedwith order HOBBY HORN 15173 Moran St IA PO Bow 2212 Westminster Ca 92609 719 8938311 [Aft Hrs 714 8951203] SERIES lOU THP DESIGN TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW \ / II vnYE Hedge Hoppin Vol 3 Special Feature Warbird Action Tos Model * Action Interviews Scale JETS British Concorde SST * Relmi Ba Con Ira Beginner $07 Mis 49 95 K 2 Ba F gb TansgForBeginners 65Mm 4495 3 Wo Mode 0500 gOMno 449$ QhkohOe em 55Mm3995 5Airplase Fancies 30 Mm Wild3995 6US Scale Masters 60 Mis413$ 7 Warbirds Action 7$ Mis Fantastic499$ 8Hedge HoppinVoll 45Mm419$ 9Whick Way Up 70 Mis Aerobatics4795 lOHedge Hoppin Vol 2 $0 Mm4095 $1 Hedoe Hoppin Vol 3 30 Mm3495 Hedge Hoppin Series Feature Variety Avaia lion Topics Full Scale & Model OrderIng InformatIon Rentals $1495 Rental DeposIt Retail Price Tape Rental DuratIon 7 Days After Delivery K Paymentt Check 10 days M 0 /M C Card # K & Esp Dale Pbone # C 0 D s Available Phone ShIppIng 3 75 Foreign Canada Add 00% Total Otters 15% IL Res Add 7% Tao Academy AvIatIon R & D PO Box 277 Hazel crest IL 60429 5 312 335-0776 Z 128 Model Aviation
Edition: Model Aviation - 1987/03
Page Numbers: 14, 16, 18, 125, 128
John Preston___________________________ Safety Comes First pinned props RC Channel/fre quency mixups Would lieve theres no Channel 19 Never fly alone PILOT PROTECTION couple weeks ago interesting telephone conversation JR Griffith down Texas executive committee member Austin RC Club JR called seek opionion concerning con troversial issue has divided clubs mem bers two camps would like ask readers agree response JR Heres story Austin club flies runway 300 feet long 50 feet wide RC pilots located some 60 feet edge runway Recently club installed con crete pads pilots stand project about three inches above ground Apparently pads have caused some damage out-ofcontrol models models ran Some club members want surround concrete pads dirt ramps instead colliding edge pad out-of-control model will merely run up ramp across pad controversy Which better have model strike edge pad stopbut per haps suffer some damage process have model run up dirt ramp surrounding pad doing create hazard pilot may standing pad can probably guess opinion expressed JR Id rather see model damaged con crete pad pilot damaged errant model Whats opinion Id appreciate re spondents describe pilot-protection barriers exist club field pinned props Following publication November 1986 issue MA quoted letter subject pinning props drive washer four-stroke engines received several additional letters subject As might expect writers divided opinions whether props should pinned also divided opinion whether self-locking nut Nylok other brand should used mimimize possibility engine backfires will kick prop entirely off shaft possibly have strike pilot bystander process latter subject Al Evans chose write Al Apex NC stated use nuts nylon inserts retain props model engines No-No support posi tion Al enclosed material Airframe & Powerpant Mechanics General Handbook RULE K sharp stub broken wooden prop took end off modelers thumb almost like nice new No 11 hobby-knife blade could haveand thought follow ing good safety precautions time accident happened Read column special issue Fasteners pub lished Machine Design magazine November 14 1985 A&P handbook states use selflocking nuts joints subject either nut bolts rotation Machine Design recom mends use anaerobic locking adhesive regard latter Al suggests using Loctite 242 color-coded blue available auto parts stores points out product will function properly unless threads prop shaft nut cleaned prior its application opinion self-locking nut may proof-positive preventing prop kicking loose should provide protection against having prop spinning entirely off shaft letter Lyman Slack described propthrowing experience first-generation ex posed valves 075 cu four-stroke engine Ever since incident Lyman has pinned props drive washer used Loctite blue secure prop nut found interesting part Lymans letter incident nothing pinning props locking nuts left him shortened right thumb descirbes follows November 1986 article show safety label referring adjusting needle valve behind what doing day friend during routine engine run purpose setting up everything just right new Scale model before going field test flight friend holding Bucker ground left right behind using three-inch screwdriver adjust idle mixture muffler too close/hot use fingers 91 engine fast idle tip screwdriver vibrated forward rear rotating prop think normally blades would have deflected screwdriver down aft reasons un known screwdriver pulled forward along right thumb As can see Lyman enclosed hub prop photograph Continued page 16 LOOI AT ThAT SEE OW WELL THAT / LoKIN- iJLrr AND AIHESVE HELD TH 7ROP odel Aviation IIII&. . New Breed 1 electronic Sachs/Dolmar Lightest weight ready-to-mount engines C 31 $32500 37- *40000 34- *38000 42- *42000 Includes Shipping & Handling Hardware Kit Sachs 31 points included Includes Shipping Handling Glass body wheel pants cowl foam wIng balsa included Laser built bones$68996 Laser Kit$24996 Laser hardware$3000 extra New two-piece wing conversion$4996 extra Option engines Throttle-coupled spark advance *5000 Features Customized newest German engines parts Muffler t ting Bolts sure Tap Smoke uretor Linkage Ignition Cl-I Electronics 48 Volt Ignition Pack ty Switch lt Hub stor Spark Plugs ar Warranty Faulty Parts Workmanship NEW PROP ADAPTER Byrons 4 3 bladed props Adapter fits Sachs engine 7/8 bolt pattern $3995 plus shipping TG MFGE 857 HIgh Mountain Rd North Haledon NJ 075080201 427-3845 appears elsewhere column JP prop transformed itself #11 X-Acto blade proceeded cut almost throught thumb took half bone instinctively grabbed TX shut down engine buddy loaded field box model van pumping water flush thumb van has sink helped wrap up thumb drove emergency room near home After X-rays bone man called gave options Either could come series operations grafts groin area could complete amputation spot opted latter So now right thumb stops fingernail would normally start As said odds doing everything book accident still hap pened Another case buddy system too just going out engine test run good thing though get 10% discount manicurist subject doing things book adjusting mixture behind prop letter came Scott Reed Greenfield MA Scott drew attention ad tach appeared right middle Safety column December 1986 issue sketch ad shows person determining engines rpm front model persons left arm shown just fractions inch rotating prop person holds model Scott asks come ad right middle column Since have nothing layout magazine cannot provide answer Scotts question would have attribute location tach ad Murphys Law last letter subject pinning props using selflocking prop nuts came Missouri modeler wishes remain anony mous modeler experienced shattering pinned prop first 90 four-stroke removed pins eliminated problem shattering props did result slippage prop respect drive washer mod eler describe unusual experience follows running engine dusk evening friendi both noticed static electricity sparks jumpihg around drive washer crankshaft length sparks 1/2 3/4 inch assume static electricity developed propeller slipping turning drive washer and/or prop washer have never seen described before teeth drive washer also ground depression back side wood propeller engine being run block time wonder what would radio reception should occur air Perhaps Radio Technique editior George Myers would interested commenting possible cause radio interference anonymous Missouri modeler also uses Nylok nut stop prop spinning off shaft commented AMA safety require ment either spinner acorn nut cover exposed end shaft glues emery paper rear spinner backplate minimize slip page problems RC channel number verses RC frequency letter West Coast modeler also requesting anonymity contained interesting tale fre quency conflict/shoot down incident occurred AMA-sanctioned contest own words what happened Continued page 18 a1-bIDZOL-5HP34-BIbsZoz-5HP AU Engines Corn piete Nothing Extra Buy 42-5 lbs 3 oz -7 HP 16 Model Aviation WEBRA NOT Clowning around Anymore MODEL AIRPLANE KITS Markss Models Craft Air Models Fly Max Airplanes Irubber powered Bentom Free Flight Telemaster Kits 140 601 Aerocraft Models Bob Martin Graupner Irubber powered kits GraupnerRIC Kits Gliders ENGINES Fox Engines Fox Mufflers Enya Engines Picco Engines BOATS Graupner RIG Boats Graupner Speed Boats BALSA Bulk Packs ACCESSORIES Fox rt Rocket City Sullivan Lak Hobbies Hinges Graupner Props Star Line Porducts Master Air Screw Dave Brown Products Telemaster Accessory Paks Bulk Accessory Paks Graupner Accessory Paks Parts Hunter Off Road Car HELICOPTERS Graupner Hughes 500 D CARS Hunter 184WD Off Road Gas Racer COVERINGS Super Fabric & Superkote Matts Model Building Stockton Drive PO Box 49 Cranbury NJ 08512 609-395-1672 $\}JKYJ UNITED MODEL PRODUCTS has appointed exclusiveengine d istri butor Only UMP brings full line raceproven WEBRA engines backs top-quality commitment service WEBRA UMP way should because comes choice engines serious UJ/M AND UMP division United Model Distributors letter consulted AMA rule book page 127 talked Bob Underwood AMA Technical Director result both cases no Channel 19 other words RC frequency 72080 MHz using should referred 72080 has no designated channel number first flier shot down error stated Channel 19 registered contest new frequencycontrol person also error logging-in transmitter non-existent Channel 19 Similarly CD error permitting fly performing own check determine frequency pin 72080 Brown & White missing Merely shouting Anyone Brown & White opinion satisfactory check Bob Underwood related another incident brought attention similar yours case flier experienced modeler referred frequency its channel number new frequency did have channel number Another flier same fre quency stated actual frequency MHz proceeded fly simultaneoustly shoot-down occurred experienced modeler blamed other flier relative newcomer knowing channel number However appears ex perienced modeler equally blame knowing actual frequency MHz cor responded Channel Number Before leaving subject frequency con flict would like draw attention frequency control board clipboard illus trated page 128 current 1986/1987 AMA rule book An article concerning board Continued page 125 checked contest asked what frequency would flying re sponded 72080 Brown & White Midway through day called fly grabbed plane went get TX no 72080 MHz frequency pin board TX off went pilots box found CD asked what shouted three other fliers Anyone Brown & White received no reply very windy conversation difficult CD asked looked pin pit area told him no avail frankly believed maybe lost pin last time used didnt think anyone else 72080 plane very old very used willing risk being shot down CD said Go ahead fly other fliers turned launched turned prior launching plane heard cry Ive shot down Fortunately hadnt yet launched obvious turned other fliers frequency hit him As turned out checked morning said Channel 19 frequency-control person new did connect 72080 Brown & White Channel 19 just matter time before cards would come up same hat Now questions told frequencies now referred channel numbers no 72080 correct local CD says isnt register contest what correct nomenclature frenquency following response Mr West Coasts questions order respond questions asked 18 Model Aviation resultant repair has stood up entire season flying failure line visible access hole its underside wing Zap makes fuel-proof bond refinishing unneces sary managed keep small repair job small simply thinking about first improvising reaching tool keep access hatch smalland small hole turn posed no threat structural integrity wing Stephen Risik Killeen TX Safety Preston Continued page 18 published January 1984 issue RCM magazine created Jack E Duff Use such board club field contest should eliminate shoot-down incidents addi tion use frequency flags pages 127 128 rule book TX antenna should mandatory requirement both club field contest December issue mentioned incidents engines went full throttle transmit ters turned off letter Lewis Woodward West Palm Beach FL some interesting conunents subject Lewis said Somewhere along course hobby Lewis added PS letter noted engines accelerate full throttle during range check performed TX antenna collapsed can returned idle simply pull ing up antenna However heat situation modelers might think Better have buddy hold model other wise secure prevent motion last tip fly CL models comes Steve Zweidler Elkins Park PA Junior member Steve stated very CL flying attention hazard bystanders may underestimate injury could result being struck flying model use Steves words Dad very important pit-crew go flying together picked clear park away houses used basketball court runway set up started flying few moments later group youngsters six- seven- eight-year olds started play games airplane chasing etc Dad scolded left could still have gotten seriously hurt Continued page 128 FAI RUBBER Sizes 114 3/16 118 3/32 1116 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber ude add $150 UPS Over $15 add 10% NEW e nahher classics P36 props Air Express Mini-Pearl /2A Crocket hooks Front end ammhiles 3 Preg kits Stardlster Satellites winders hardware looks ZONA SAWS famous line hobby saws Razor #200$255 Replacement Blades available dealer Send $100 1986 Catalog FAt Model Suppty P0 Box 3957 Torrance CA 90510 March 1987 125 told check TX range engine idling Letters EditorOn several o&asions engine idling walked away plane check TX Continued page 10range about 10 feet plane engine accelerated plane headed blue yonder occasioll nose plane over order stop discovered ran toward plane engine would return idle dangerous procedure must alert check TX range engine idling safe way have someone else hold plan making range check THE LEADER IN COMPETITION PROPELLERS b6 NEW tL F 4 CYCLE DIAPITCH THP 1266778 136778 146778 1567 16678 PRICE 299 379 479 689 989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 534149 634149 72833456179 8334568189 845667199 9456677199 1045667209 106W8W209 10BEW219 114677775a8229 115W229 116EW239 1167239 124W279 12SW279 1256279 1356349 1456459 1556659 164N969 16678969 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5N279 8677/a6299 SERIES 400C 866777/a289 9777289 W WIDE BLADE EW EXTRA WIDE hI IUARRAW Safety/Preston Continued page 125 sound running model airplane engine seems draw children like magnet possible launch fly CL model using stooge oneself dont recommend helper sometimes difficult keep people straying circle recall another letter received subject related episode CL modeler flying public park lady walk dog straight through circle totally oblivious fact model flying overhead Ive frequently told RC modelers fly alone message applies equally CL modelers Have safe month John Preston 2812 Northampton St N W Washington DC 20015 Heron/Winter Continued page 38 increments Yes may need override stick comforting thought Heron capable gliding back hair-raising distances Approaches difficult dont have large open areas area confined may windup making series wide 360s around yourself However Heron can maneuvered quickly abort go-round observe last climb sluggish side always shut down leaves enough battery capacity least several gorounds Dont belabor last climb thats can get battery too hot experimentally-minded builder encouraged try different motor bat tery combinationsincluding 800 mAh cells various numbers cells Du ration climb glide will different other may better worse depending what plane ball park docile less spectacular LeCrate geared 05 2l fixed 11-7 wood prop 361 Leisure 05 will handle big folders Id start 12-in Master Airscrew folder other good ones case Mabuchi remember comes iron band Robbe Without band expect performance would what landing gear re moved geared Astro Cobalt seven cells 800 mAh capacity its correct prop Herron will come reasonably close competition things like Heron exactly way RC Aerobatics/Van Putte Continued page 41 wont excerpt Editors note information about Competi tion Newsletter section magazine month RMcM Suffice say Nats should much better year Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 Old Timer 2Yk2kAom L5NZOS 8 Gas MODEL 1941 BROOKLYN DODGER 56 Cabin 0NEW65T Retail $52 95INTRODUCTORY PRICEO $3900 1938 Record Bi-eake- 96 $5956 tt3MZipper t9S5356 1938 Kloud King 63 $42 36 1981 Brigidier 56 $4076 1991 super-Quaker 78 5/276 1940 50 Long 55S3036 1936 Buccaneer 89 $0996 1938 Clipper MKI 72$9156 1937 Dallaire 158 575 16 1935 Miss America 84 $7196 1941 Playboy Sr 80 $5116 1991 Playboy Jr 59 $3116 1938 Powerhouse 89 05356 1990 Sailplane 78 $8976 1938 Trenton Terror 32 $40 76 1990 Ranger 96 $3196 1939 Korda Wake 99 $1916 1939 Mercury 72 6 kits qualify SAM events PP & B/C feature highest quality machine cut & sanded ports Superior oil Competition sheet ond strip wood wire & window material Plans orig FF hut models easily convertible 2ch R IC KITS Sailplanes Electric power Gas Hobby Horn SbNSOAR Glider 78 5s $1000 Midway Model GNOME R/G Hand Launch Glider$2900 Jolly Models FLINGER R/G HLG 58 span $2900 Midway Model FAST EDDIE Aerobatic /05 Elec$1908 Jolly Models ELECTRICUS Electric Glider 05s$3258 Leisure PLAYBOY SR 67 Gear 05 Elect $3000 Astro ASTRO SPORT 37 Direct 05 Elect $2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 86 Geared 09 EP $3900 Midway FLYING QUAKER 09 90-959 stroke $6976 9ks/Midway DENNY JR 72 Alsim Cowel $6396 9ks/Midwav BUZZARD BOMBSHELL 72$0196 FULL LINE OF ELECTRIC SYSTEMS 5 Parts Avail slitrriii & HANDLING Up $000 add $150 $001 $2000 add $225 $2001 $9500 add $300 $9501 $7000 add $350 aver $7000 add $900 CA Addressees add 6% law Send MO Visa/MCI#rEapl Check allow up 30 days CK clearance COD Exact Charges pbs $150 Hdl Cash Only 64 Page lasasuuuum $200 PP/tst Class copy will sent free-when requestedwith order HOBBY HORN 15173 Moran St IA PO Bow 2212 Westminster Ca 92609 719 8938311 [Aft Hrs 714 8951203] SERIES lOU THP DESIGN TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW \ / II vnYE Hedge Hoppin Vol 3 Special Feature Warbird Action Tos Model * Action Interviews Scale JETS British Concorde SST * Relmi Ba Con Ira Beginner $07 Mis 49 95 K 2 Ba F gb TansgForBeginners 65Mm 4495 3 Wo Mode 0500 gOMno 449$ QhkohOe em 55Mm3995 5Airplase Fancies 30 Mm Wild3995 6US Scale Masters 60 Mis413$ 7 Warbirds Action 7$ Mis Fantastic499$ 8Hedge HoppinVoll 45Mm419$ 9Whick Way Up 70 Mis Aerobatics4795 lOHedge Hoppin Vol 2 $0 Mm4095 $1 Hedoe Hoppin Vol 3 30 Mm3495 Hedge Hoppin Series Feature Variety Avaia lion Topics Full Scale & Model OrderIng InformatIon Rentals $1495 Rental DeposIt Retail Price Tape Rental DuratIon 7 Days After Delivery K Paymentt Check 10 days M 0 /M C Card # K & Esp Dale Pbone # C 0 D s Available Phone ShIppIng 3 75 Foreign Canada Add 00% Total Otters 15% IL Res Add 7% Tao Academy AvIatIon R & D PO Box 277 Hazel crest IL 60429 5 312 335-0776 Z 128 Model Aviation
Edition: Model Aviation - 1987/03
Page Numbers: 14, 16, 18, 125, 128
John Preston___________________________ Safety Comes First pinned props RC Channel/fre quency mixups Would lieve theres no Channel 19 Never fly alone PILOT PROTECTION couple weeks ago interesting telephone conversation JR Griffith down Texas executive committee member Austin RC Club JR called seek opionion concerning con troversial issue has divided clubs mem bers two camps would like ask readers agree response JR Heres story Austin club flies runway 300 feet long 50 feet wide RC pilots located some 60 feet edge runway Recently club installed con crete pads pilots stand project about three inches above ground Apparently pads have caused some damage out-ofcontrol models models ran Some club members want surround concrete pads dirt ramps instead colliding edge pad out-of-control model will merely run up ramp across pad controversy Which better have model strike edge pad stopbut per haps suffer some damage process have model run up dirt ramp surrounding pad doing create hazard pilot may standing pad can probably guess opinion expressed JR Id rather see model damaged con crete pad pilot damaged errant model Whats opinion Id appreciate re spondents describe pilot-protection barriers exist club field pinned props Following publication November 1986 issue MA quoted letter subject pinning props drive washer four-stroke engines received several additional letters subject As might expect writers divided opinions whether props should pinned also divided opinion whether self-locking nut Nylok other brand should used mimimize possibility engine backfires will kick prop entirely off shaft possibly have strike pilot bystander process latter subject Al Evans chose write Al Apex NC stated use nuts nylon inserts retain props model engines No-No support posi tion Al enclosed material Airframe & Powerpant Mechanics General Handbook RULE K sharp stub broken wooden prop took end off modelers thumb almost like nice new No 11 hobby-knife blade could haveand thought follow ing good safety precautions time accident happened Read column special issue Fasteners pub lished Machine Design magazine November 14 1985 A&P handbook states use selflocking nuts joints subject either nut bolts rotation Machine Design recom mends use anaerobic locking adhesive regard latter Al suggests using Loctite 242 color-coded blue available auto parts stores points out product will function properly unless threads prop shaft nut cleaned prior its application opinion self-locking nut may proof-positive preventing prop kicking loose should provide protection against having prop spinning entirely off shaft letter Lyman Slack described propthrowing experience first-generation ex posed valves 075 cu four-stroke engine Ever since incident Lyman has pinned props drive washer used Loctite blue secure prop nut found interesting part Lymans letter incident nothing pinning props locking nuts left him shortened right thumb descirbes follows November 1986 article show safety label referring adjusting needle valve behind what doing day friend during routine engine run purpose setting up everything just right new Scale model before going field test flight friend holding Bucker ground left right behind using three-inch screwdriver adjust idle mixture muffler too close/hot use fingers 91 engine fast idle tip screwdriver vibrated forward rear rotating prop think normally blades would have deflected screwdriver down aft reasons un known screwdriver pulled forward along right thumb As can see Lyman enclosed hub prop photograph Continued page 16 LOOI AT ThAT SEE OW WELL THAT / LoKIN- iJLrr AND AIHESVE HELD TH 7ROP odel Aviation IIII&. . New Breed 1 electronic Sachs/Dolmar Lightest weight ready-to-mount engines C 31 $32500 37- *40000 34- *38000 42- *42000 Includes Shipping & Handling Hardware Kit Sachs 31 points included Includes Shipping Handling Glass body wheel pants cowl foam wIng balsa included Laser built bones$68996 Laser Kit$24996 Laser hardware$3000 extra New two-piece wing conversion$4996 extra Option engines Throttle-coupled spark advance *5000 Features Customized newest German engines parts Muffler t ting Bolts sure Tap Smoke uretor Linkage Ignition Cl-I Electronics 48 Volt Ignition Pack ty Switch lt Hub stor Spark Plugs ar Warranty Faulty Parts Workmanship NEW PROP ADAPTER Byrons 4 3 bladed props Adapter fits Sachs engine 7/8 bolt pattern $3995 plus shipping TG MFGE 857 HIgh Mountain Rd North Haledon NJ 075080201 427-3845 appears elsewhere column JP prop transformed itself #11 X-Acto blade proceeded cut almost throught thumb took half bone instinctively grabbed TX shut down engine buddy loaded field box model van pumping water flush thumb van has sink helped wrap up thumb drove emergency room near home After X-rays bone man called gave options Either could come series operations grafts groin area could complete amputation spot opted latter So now right thumb stops fingernail would normally start As said odds doing everything book accident still hap pened Another case buddy system too just going out engine test run good thing though get 10% discount manicurist subject doing things book adjusting mixture behind prop letter came Scott Reed Greenfield MA Scott drew attention ad tach appeared right middle Safety column December 1986 issue sketch ad shows person determining engines rpm front model persons left arm shown just fractions inch rotating prop person holds model Scott asks come ad right middle column Since have nothing layout magazine cannot provide answer Scotts question would have attribute location tach ad Murphys Law last letter subject pinning props using selflocking prop nuts came Missouri modeler wishes remain anony mous modeler experienced shattering pinned prop first 90 four-stroke removed pins eliminated problem shattering props did result slippage prop respect drive washer mod eler describe unusual experience follows running engine dusk evening friendi both noticed static electricity sparks jumpihg around drive washer crankshaft length sparks 1/2 3/4 inch assume static electricity developed propeller slipping turning drive washer and/or prop washer have never seen described before teeth drive washer also ground depression back side wood propeller engine being run block time wonder what would radio reception should occur air Perhaps Radio Technique editior George Myers would interested commenting possible cause radio interference anonymous Missouri modeler also uses Nylok nut stop prop spinning off shaft commented AMA safety require ment either spinner acorn nut cover exposed end shaft glues emery paper rear spinner backplate minimize slip page problems RC channel number verses RC frequency letter West Coast modeler also requesting anonymity contained interesting tale fre quency conflict/shoot down incident occurred AMA-sanctioned contest own words what happened Continued page 18 a1-bIDZOL-5HP34-BIbsZoz-5HP AU Engines Corn piete Nothing Extra Buy 42-5 lbs 3 oz -7 HP 16 Model Aviation WEBRA NOT Clowning around Anymore MODEL AIRPLANE KITS Markss Models Craft Air Models Fly Max Airplanes Irubber powered Bentom Free Flight Telemaster Kits 140 601 Aerocraft Models Bob Martin Graupner Irubber powered kits GraupnerRIC Kits Gliders ENGINES Fox Engines Fox Mufflers Enya Engines Picco Engines BOATS Graupner RIG Boats Graupner Speed Boats BALSA Bulk Packs ACCESSORIES Fox rt Rocket City Sullivan Lak Hobbies Hinges Graupner Props Star Line Porducts Master Air Screw Dave Brown Products Telemaster Accessory Paks Bulk Accessory Paks Graupner Accessory Paks Parts Hunter Off Road Car HELICOPTERS Graupner Hughes 500 D CARS Hunter 184WD Off Road Gas Racer COVERINGS Super Fabric & Superkote Matts Model Building Stockton Drive PO Box 49 Cranbury NJ 08512 609-395-1672 $\}JKYJ UNITED MODEL PRODUCTS has appointed exclusiveengine d istri butor Only UMP brings full line raceproven WEBRA engines backs top-quality commitment service WEBRA UMP way should because comes choice engines serious UJ/M AND UMP division United Model Distributors letter consulted AMA rule book page 127 talked Bob Underwood AMA Technical Director result both cases no Channel 19 other words RC frequency 72080 MHz using should referred 72080 has no designated channel number first flier shot down error stated Channel 19 registered contest new frequencycontrol person also error logging-in transmitter non-existent Channel 19 Similarly CD error permitting fly performing own check determine frequency pin 72080 Brown & White missing Merely shouting Anyone Brown & White opinion satisfactory check Bob Underwood related another incident brought attention similar yours case flier experienced modeler referred frequency its channel number new frequency did have channel number Another flier same fre quency stated actual frequency MHz proceeded fly simultaneoustly shoot-down occurred experienced modeler blamed other flier relative newcomer knowing channel number However appears ex perienced modeler equally blame knowing actual frequency MHz cor responded Channel Number Before leaving subject frequency con flict would like draw attention frequency control board clipboard illus trated page 128 current 1986/1987 AMA rule book An article concerning board Continued page 125 checked contest asked what frequency would flying re sponded 72080 Brown & White Midway through day called fly grabbed plane went get TX no 72080 MHz frequency pin board TX off went pilots box found CD asked what shouted three other fliers Anyone Brown & White received no reply very windy conversation difficult CD asked looked pin pit area told him no avail frankly believed maybe lost pin last time used didnt think anyone else 72080 plane very old very used willing risk being shot down CD said Go ahead fly other fliers turned launched turned prior launching plane heard cry Ive shot down Fortunately hadnt yet launched obvious turned other fliers frequency hit him As turned out checked morning said Channel 19 frequency-control person new did connect 72080 Brown & White Channel 19 just matter time before cards would come up same hat Now questions told frequencies now referred channel numbers no 72080 correct local CD says isnt register contest what correct nomenclature frenquency following response Mr West Coasts questions order respond questions asked 18 Model Aviation resultant repair has stood up entire season flying failure line visible access hole its underside wing Zap makes fuel-proof bond refinishing unneces sary managed keep small repair job small simply thinking about first improvising reaching tool keep access hatch smalland small hole turn posed no threat structural integrity wing Stephen Risik Killeen TX Safety Preston Continued page 18 published January 1984 issue RCM magazine created Jack E Duff Use such board club field contest should eliminate shoot-down incidents addi tion use frequency flags pages 127 128 rule book TX antenna should mandatory requirement both club field contest December issue mentioned incidents engines went full throttle transmit ters turned off letter Lewis Woodward West Palm Beach FL some interesting conunents subject Lewis said Somewhere along course hobby Lewis added PS letter noted engines accelerate full throttle during range check performed TX antenna collapsed can returned idle simply pull ing up antenna However heat situation modelers might think Better have buddy hold model other wise secure prevent motion last tip fly CL models comes Steve Zweidler Elkins Park PA Junior member Steve stated very CL flying attention hazard bystanders may underestimate injury could result being struck flying model use Steves words Dad very important pit-crew go flying together picked clear park away houses used basketball court runway set up started flying few moments later group youngsters six- seven- eight-year olds started play games airplane chasing etc Dad scolded left could still have gotten seriously hurt Continued page 128 FAI RUBBER Sizes 114 3/16 118 3/32 1116 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $175 Postpaid US Via UPS add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber ude add $150 UPS Over $15 add 10% NEW e nahher classics P36 props Air Express Mini-Pearl /2A Crocket hooks Front end ammhiles 3 Preg kits Stardlster Satellites winders hardware looks ZONA SAWS famous line hobby saws Razor #200$255 Replacement Blades available dealer Send $100 1986 Catalog FAt Model Suppty P0 Box 3957 Torrance CA 90510 March 1987 125 told check TX range engine idling Letters EditorOn several o&asions engine idling walked away plane check TX Continued page 10range about 10 feet plane engine accelerated plane headed blue yonder occasioll nose plane over order stop discovered ran toward plane engine would return idle dangerous procedure must alert check TX range engine idling safe way have someone else hold plan making range check THE LEADER IN COMPETITION PROPELLERS b6 NEW tL F 4 CYCLE DIAPITCH THP 1266778 136778 146778 1567 16678 PRICE 299 379 479 689 989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 534149 634149 72833456179 8334568189 845667199 9456677199 1045667209 106W8W209 10BEW219 114677775a8229 115W229 116EW239 1167239 124W279 12SW279 1256279 1356349 1456459 1556659 164N969 16678969 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5N279 8677/a6299 SERIES 400C 866777/a289 9777289 W WIDE BLADE EW EXTRA WIDE hI IUARRAW Safety/Preston Continued page 125 sound running model airplane engine seems draw children like magnet possible launch fly CL model using stooge oneself dont recommend helper sometimes difficult keep people straying circle recall another letter received subject related episode CL modeler flying public park lady walk dog straight through circle totally oblivious fact model flying overhead Ive frequently told RC modelers fly alone message applies equally CL modelers Have safe month John Preston 2812 Northampton St N W Washington DC 20015 Heron/Winter Continued page 38 increments Yes may need override stick comforting thought Heron capable gliding back hair-raising distances Approaches difficult dont have large open areas area confined may windup making series wide 360s around yourself However Heron can maneuvered quickly abort go-round observe last climb sluggish side always shut down leaves enough battery capacity least several gorounds Dont belabor last climb thats can get battery too hot experimentally-minded builder encouraged try different motor bat tery combinationsincluding 800 mAh cells various numbers cells Du ration climb glide will different other may better worse depending what plane ball park docile less spectacular LeCrate geared 05 2l fixed 11-7 wood prop 361 Leisure 05 will handle big folders Id start 12-in Master Airscrew folder other good ones case Mabuchi remember comes iron band Robbe Without band expect performance would what landing gear re moved geared Astro Cobalt seven cells 800 mAh capacity its correct prop Herron will come reasonably close competition things like Heron exactly way RC Aerobatics/Van Putte Continued page 41 wont excerpt Editors note information about Competi tion Newsletter section magazine month RMcM Suffice say Nats should much better year Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 Old Timer 2Yk2kAom L5NZOS 8 Gas MODEL 1941 BROOKLYN DODGER 56 Cabin 0NEW65T Retail $52 95INTRODUCTORY PRICEO $3900 1938 Record Bi-eake- 96 $5956 tt3MZipper t9S5356 1938 Kloud King 63 $42 36 1981 Brigidier 56 $4076 1991 super-Quaker 78 5/276 1940 50 Long 55S3036 1936 Buccaneer 89 $0996 1938 Clipper MKI 72$9156 1937 Dallaire 158 575 16 1935 Miss America 84 $7196 1941 Playboy Sr 80 $5116 1991 Playboy Jr 59 $3116 1938 Powerhouse 89 05356 1990 Sailplane 78 $8976 1938 Trenton Terror 32 $40 76 1990 Ranger 96 $3196 1939 Korda Wake 99 $1916 1939 Mercury 72 6 kits qualify SAM events PP & B/C feature highest quality machine cut & sanded ports Superior oil Competition sheet ond strip wood wire & window material Plans orig FF hut models easily convertible 2ch R IC KITS Sailplanes Electric power Gas Hobby Horn SbNSOAR Glider 78 5s $1000 Midway Model GNOME R/G Hand Launch Glider$2900 Jolly Models FLINGER R/G HLG 58 span $2900 Midway Model FAST EDDIE Aerobatic /05 Elec$1908 Jolly Models ELECTRICUS Electric Glider 05s$3258 Leisure PLAYBOY SR 67 Gear 05 Elect $3000 Astro ASTRO SPORT 37 Direct 05 Elect $2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 86 Geared 09 EP $3900 Midway FLYING QUAKER 09 90-959 stroke $6976 9ks/Midway DENNY JR 72 Alsim Cowel $6396 9ks/Midwav BUZZARD BOMBSHELL 72$0196 FULL LINE OF ELECTRIC SYSTEMS 5 Parts Avail slitrriii & HANDLING Up $000 add $150 $001 $2000 add $225 $2001 $9500 add $300 $9501 $7000 add $350 aver $7000 add $900 CA Addressees add 6% law Send MO Visa/MCI#rEapl Check allow up 30 days CK clearance COD Exact Charges pbs $150 Hdl Cash Only 64 Page lasasuuuum $200 PP/tst Class copy will sent free-when requestedwith order HOBBY HORN 15173 Moran St IA PO Bow 2212 Westminster Ca 92609 719 8938311 [Aft Hrs 714 8951203] SERIES lOU THP DESIGN TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW \ / II vnYE Hedge Hoppin Vol 3 Special Feature Warbird Action Tos Model * Action Interviews Scale JETS British Concorde SST * Relmi Ba Con Ira Beginner $07 Mis 49 95 K 2 Ba F gb TansgForBeginners 65Mm 4495 3 Wo Mode 0500 gOMno 449$ QhkohOe em 55Mm3995 5Airplase Fancies 30 Mm Wild3995 6US Scale Masters 60 Mis413$ 7 Warbirds Action 7$ Mis Fantastic499$ 8Hedge HoppinVoll 45Mm419$ 9Whick Way Up 70 Mis Aerobatics4795 lOHedge Hoppin Vol 2 $0 Mm4095 $1 Hedoe Hoppin Vol 3 30 Mm3495 Hedge Hoppin Series Feature Variety Avaia lion Topics Full Scale & Model OrderIng InformatIon Rentals $1495 Rental DeposIt Retail Price Tape Rental DuratIon 7 Days After Delivery K Paymentt Check 10 days M 0 /M C Card # K & Esp Dale Pbone # C 0 D s Available Phone ShIppIng 3 75 Foreign Canada Add 00% Total Otters 15% IL Res Add 7% Tao Academy AvIatIon R & D PO Box 277 Hazel crest IL 60429 5 312 335-0776 Z 128 Model Aviation