Control Line Racing John Ballard WINTER months Midwest area bring engine-testing flying halt short days low temperatures keep us inside doing winter building projects Several readers Chicago Cleveland Detroit Wisconsin have written concerning building proj ects possible information various products product earning creditable mention finishing new Goodyear Sport Race airplanes 1986 prod uct introduced last year Pettit Fast Fill brought out almost year ago Kenneth Williams Hobbypoxy sales manager wrote asking opinion product extremely light weight filled well felt sanded hard Apparently other people thought too first year sent let ter another sample product say ing improved Fast Fill incor porate better sanding properties new product has same good filling light weight now sands much easier Sport Race summer flying Mid west Profile Sport Race found couple tips apparently mandatory building extremely light 3 5-sleevebearing-powered aircraft several occasions have noticed competitors having problems built-up wing cracking splitting outboard Continued page 149 See alligator clip soldered side Sport Racers fuel tank pinches off flexible priming line during flight yet allows easy priminglovertlow during pit stop clever idea 66 Model Aviation Glen Lee poor luck recent 700-lap Midwest Sport Race p lane lost outboard wing early race MonoKote covering melted fuel soaked raw balsapianked area went though wingfor little eani nave lots fuel nia e ground pote w inter man pusnea open aii way ano bottlelots runnIng down wing gerous situationfor pit fire Lots fuel spilled hot tarmac past p resent pit stops leaves site ripe ignition especially alcohol vapors hot glow plug flier say market isnt exactly awash hot new stuff potential Stunt flier would understatement outstanding exceptions Sig Top Elite both commended continued recogni tion Control Line activity need quality kits reasonably modern designs distressing lack selec tion primary Stunt student Ster ling Models has continued production Ringmaster has discontinued popular thought YAK P-S 1 profile Stunters Midwest has apparently shut down entire line semi-scale profile Stunters Veco/Dumas line such T-Bird Smoothie Chief etc memory No Ruffys Sharks Spit fire Stunters Ares Stuka Stunts Magi cians Skylarksand on particularly distressed learn Carl Goldberg Models has stopped production its Buster/Cosmic Wind Shoestring Stunter series demise Magician last reasonably stuntable non-flapped kits market thus important step ping-stone primary level Stunt pilot loss would severe blow CL activity Along apparently quite few others wrote Goldberg asking reconsider its decision am pleased report plea met some success has resurrected Shoestring Stunt er once available would like use forum thank Goldberg recognizing need would hope company would future consider occasional CL addition its line late founder Carl Goldberg would Im sure pleased com pany continuing tradition sup port aspects modeling Its probably true Control Line ac tivity no longer can support number kits did before big bucks RC became irresistable apparently relentless force marketplace still seems though viable market should generate some effort part manufacturers keep abreast cur rent trends provide CL frater nity well-engineered competitive kits solicit such support stand ready help manufacturer desirous fill ing needs popularity RC has indeed caused some consternation part Control Liners also true along modelers have enjoyed proliferation available hardware generally useful CL RC especially true control fixtures horns pushrods connectors forth piece control system uniquely Control Line however bellcrank increased popu larity ever-larger Stunters commer cially-available bellcranks generally three-inch size have reached limit capability Control forces simply too large handled efficiently Fortu nately commercial alternatives becoming available have recently received advance sample new LR Products Ltd twoline bellcrank product No C-25 31A-inch metal crank 7A-in arm pushrod should ideal con trol horn arms having lengths % 1i/ front-Up-line planform small amount self-center ing geometry built ie axis rota tion offset lead-out attachpoint unit should available shortly hobby dealer list price will $3 LR also produces 2%-in version may ideal AA size addition SST Products 28746 West field Livonia MI 48150 manufacturing 34-in four-inch plastic cranks very lightweight available mall price $4 last source Fancher 3-in circular crank available mall order Mark Pollard 5412 Brophy Dr Fremont CA 94536 Its machined aluminum priced $10 plus 75 cents postage handling Next month have imported great expense dime wilds New Joisey wit wisdom Lou Dudka Glen Meador discuss extremely popular Supertigre 60 care feeding thereof Enjoy Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Racing/Ballard Continued page 66 inboard sideand longer races wing may fall off foil otherwise excellent run majority people making built-up airframe quarter- halfinch leading edge covering MonoKote some other type shrink able covering problem begins sleeve-bearing engines develop considerable amount vibration causing small cracks delaminations form covering around center section planked areas exhaust running over outboard planked area would quickly become fuel- oil-saturated lose strength resulting lost out board wings addition low-intro 3lo-5o fuel increases potential flammability its large percentage contained metha nol am enclosing picture Glen Lees Sport Racer taken during 700-lap race iro pit stops engine caught airframe fire just se cond two MonoKote covering burned away next pit stop Tuned Pipe Clamp $250** pipe included CLEANER Polisher Glider Pilots Take Note P-Cia 171 3 Tuned Pipe Clamp ood 5000 $149** pipe included U Add $175 Add $050 Shipping Handling Dealer-Dist lnqwries Invited GRAPHICS STRIPING TAPE 60 feet price 36 3 sizes package / 6 /8 -4 14 77 O0VTE 4208R dH hrnPA April 1986 149 THE ONE THAT WORKS PRO-CLAMP ITS SNAP SUPER SHINE SUPER SLICK 8oz $4 95* L WANNA RACE IJADIJAT AOA L BEGINNER RACES 0 * FORM-i Instructions 5 Programs Information Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVE FRANKLIN MASS 02038 Tel 611 528-4043 203 673-2000 QUAY BARBER MODELS 174 Si ZO Falok RI v ut S SEMIKIT $11995 EPOXY/CLASS/FOAM/BALSAKIT$15495 CONSTRUCTION WITH DRAWINGS AND DATA FOR FORMULA 120216 7774172 PYLON SPORT OR STANDOFF SCALE FULL OR SEMIKITSCosmic 8 10 lbs weightWind 790 sq wing areaSEMIKIT $10995 60 2 stroke 12 4 stroke KIT $14495 skit prices plus shipping ecredit cards welcome Ohio residents add 6 % S Other kits coming 27106 Butternut RidgeNorth Olmeted Ohio 44070 Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH KAB Micro-Balloons FILLER K&B SUPER PONY RESIN K&B SUPER PONY THINNER K&B SUPER PONY PRIMER K&B SUPER PONY PAINT K&B MIXING CUPS Glen lost outboard wing pic ture shows him refueling plane continued flew approximately 300 laps 700-lap race out board wing obviously de creased maneuverability speed takeoff characteristics have found taking two-compo nent epoxy thinning 25-50% sol vent applying over planked wing area out about three four ribs center section reduced amount fuel oil intrusion conse quently airframe strength main tained especially desirable shrinkable wing coverings used penetrate woods surface two-component epoxy would coverings have tendency peel back melted slight fire heat virtually no protection wood thinned-down clear twocomponent epoxy can also used coating profile fuselage tail sur faces thinning product get very little build-up wood surfaces consequently excellent adhesion shrinkable covering maintained Safety first will remember Jerry Meyer rather serious fire during Slow Rat racing event 1985 Nats result spilled raw fuel airframe extremely hot Gb-Bee battery large amount spilled fuel tarmac around pitting area have enclosed picture Slow Rat ing fueled pint plastic bottle tank filler fully pushed down overflow raw fuel running down inboard wing enormous amount fuel plus fuel ground under neath plane can easily ignited hot day well-charged Gb Bee battery another picture can see large amount fuel spilled ground vicinity pit man starting area fuel aircraft ground vapors can ignited easi ly majority Slow Rat Sport Race aircraft have automatic priming system basically portion overflow tank prime almost always goes exhaust port area piston closed thus allowing large amount fuel exhaust region hot battery applied fire can easily result case Rat Racers quick fills usually found body portion aircraft consequently amount fuel over rear plane during filling minimized addition ma jority engines rear-exhaust types competitors use mini-pipe directs exhaust away airframe best ways prime Rat engine tilt airplane forward squirt small amount fuel pipe allowing run down ex haust port engine pipe elimi nates majority fire hazard ex haust stack directs oil heat residue away fuel tank area Special priming uniflow tank have noticed several Sport Race enthusiasts utilizing uniflow tank arrangement added overflow tube allows priming engine An ingenious meth od used exiting tube virtually upper portion tank mount ing alligator clip side tank pinching flexible line leads exhaust prime tube fill ing tank alligator clip pressed finger thus opening up overflow allowing air escape tank well priming engine priming finished alligator clip mashed shut system becomes sealed except uniflow tube pointing out airstream am enclosing photo showing alligator clip closed position Another area note large alumi num mounting plate used sleevebearing K&B 35 Without ball bearings case engine vibration definite problem extremely strong fuselage section mounting plate must incor porated sour engine runs reduced airspeed will result As always comments appreci ated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 CL Speed/Hem pel Continued page 67 complete line monoline torque con trol units guarantees torque units life price little steep workmanship superb formation check listing end column have asked numerous Speed modelers would contribute some expertise Speed column appears person willing take up offer Ed Jacoby Glen Cove NY has very interesting way forming aluminum wings As discussed telephone enclosed bit information MA column FYI Department Aluminum Wing Panels Flashing Aluminum sold hardware building supply stores material appears very satisfactory purposes As sold temper approximately half-hard thick ness 012 have found material 14-in wide rolls less $1 per foot Please refer sketch Step 1 Lay out half-span panel shown cut out sharp model ers knife such No 11 X-Acto Step 2 De-burr edges Step 3 Bend panel leading edge line have access bending brake great reasonable substi tute can made using length 1/2 x 3/4-in maple motor mount materi al See sketches Bend panel beyond 90 possible Step 4 Rough up inside surfaces trailing edge 80-grit sand paper Glue two surfaces together Hobbypoxy Formula II Spread epoxy out thin keep other surfaces clean alcohol Step 5 Protect workbench waxed paper clamp trailing edge down using spreader bar shown spreader bar used apply evenly150 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AdaneMaine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices
Edition: Model Aviation - 1986/04
Page Numbers: 66, 149, 150
Control Line Racing John Ballard WINTER months Midwest area bring engine-testing flying halt short days low temperatures keep us inside doing winter building projects Several readers Chicago Cleveland Detroit Wisconsin have written concerning building proj ects possible information various products product earning creditable mention finishing new Goodyear Sport Race airplanes 1986 prod uct introduced last year Pettit Fast Fill brought out almost year ago Kenneth Williams Hobbypoxy sales manager wrote asking opinion product extremely light weight filled well felt sanded hard Apparently other people thought too first year sent let ter another sample product say ing improved Fast Fill incor porate better sanding properties new product has same good filling light weight now sands much easier Sport Race summer flying Mid west Profile Sport Race found couple tips apparently mandatory building extremely light 3 5-sleevebearing-powered aircraft several occasions have noticed competitors having problems built-up wing cracking splitting outboard Continued page 149 See alligator clip soldered side Sport Racers fuel tank pinches off flexible priming line during flight yet allows easy priminglovertlow during pit stop clever idea 66 Model Aviation Glen Lee poor luck recent 700-lap Midwest Sport Race p lane lost outboard wing early race MonoKote covering melted fuel soaked raw balsapianked area went though wingfor little eani nave lots fuel nia e ground pote w inter man pusnea open aii way ano bottlelots runnIng down wing gerous situationfor pit fire Lots fuel spilled hot tarmac past p resent pit stops leaves site ripe ignition especially alcohol vapors hot glow plug flier say market isnt exactly awash hot new stuff potential Stunt flier would understatement outstanding exceptions Sig Top Elite both commended continued recogni tion Control Line activity need quality kits reasonably modern designs distressing lack selec tion primary Stunt student Ster ling Models has continued production Ringmaster has discontinued popular thought YAK P-S 1 profile Stunters Midwest has apparently shut down entire line semi-scale profile Stunters Veco/Dumas line such T-Bird Smoothie Chief etc memory No Ruffys Sharks Spit fire Stunters Ares Stuka Stunts Magi cians Skylarksand on particularly distressed learn Carl Goldberg Models has stopped production its Buster/Cosmic Wind Shoestring Stunter series demise Magician last reasonably stuntable non-flapped kits market thus important step ping-stone primary level Stunt pilot loss would severe blow CL activity Along apparently quite few others wrote Goldberg asking reconsider its decision am pleased report plea met some success has resurrected Shoestring Stunt er once available would like use forum thank Goldberg recognizing need would hope company would future consider occasional CL addition its line late founder Carl Goldberg would Im sure pleased com pany continuing tradition sup port aspects modeling Its probably true Control Line ac tivity no longer can support number kits did before big bucks RC became irresistable apparently relentless force marketplace still seems though viable market should generate some effort part manufacturers keep abreast cur rent trends provide CL frater nity well-engineered competitive kits solicit such support stand ready help manufacturer desirous fill ing needs popularity RC has indeed caused some consternation part Control Liners also true along modelers have enjoyed proliferation available hardware generally useful CL RC especially true control fixtures horns pushrods connectors forth piece control system uniquely Control Line however bellcrank increased popu larity ever-larger Stunters commer cially-available bellcranks generally three-inch size have reached limit capability Control forces simply too large handled efficiently Fortu nately commercial alternatives becoming available have recently received advance sample new LR Products Ltd twoline bellcrank product No C-25 31A-inch metal crank 7A-in arm pushrod should ideal con trol horn arms having lengths % 1i/ front-Up-line planform small amount self-center ing geometry built ie axis rota tion offset lead-out attachpoint unit should available shortly hobby dealer list price will $3 LR also produces 2%-in version may ideal AA size addition SST Products 28746 West field Livonia MI 48150 manufacturing 34-in four-inch plastic cranks very lightweight available mall price $4 last source Fancher 3-in circular crank available mall order Mark Pollard 5412 Brophy Dr Fremont CA 94536 Its machined aluminum priced $10 plus 75 cents postage handling Next month have imported great expense dime wilds New Joisey wit wisdom Lou Dudka Glen Meador discuss extremely popular Supertigre 60 care feeding thereof Enjoy Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Racing/Ballard Continued page 66 inboard sideand longer races wing may fall off foil otherwise excellent run majority people making built-up airframe quarter- halfinch leading edge covering MonoKote some other type shrink able covering problem begins sleeve-bearing engines develop considerable amount vibration causing small cracks delaminations form covering around center section planked areas exhaust running over outboard planked area would quickly become fuel- oil-saturated lose strength resulting lost out board wings addition low-intro 3lo-5o fuel increases potential flammability its large percentage contained metha nol am enclosing picture Glen Lees Sport Racer taken during 700-lap race iro pit stops engine caught airframe fire just se cond two MonoKote covering burned away next pit stop Tuned Pipe Clamp $250** pipe included CLEANER Polisher Glider Pilots Take Note P-Cia 171 3 Tuned Pipe Clamp ood 5000 $149** pipe included U Add $175 Add $050 Shipping Handling Dealer-Dist lnqwries Invited GRAPHICS STRIPING TAPE 60 feet price 36 3 sizes package / 6 /8 -4 14 77 O0VTE 4208R dH hrnPA April 1986 149 THE ONE THAT WORKS PRO-CLAMP ITS SNAP SUPER SHINE SUPER SLICK 8oz $4 95* L WANNA RACE IJADIJAT AOA L BEGINNER RACES 0 * FORM-i Instructions 5 Programs Information Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVE FRANKLIN MASS 02038 Tel 611 528-4043 203 673-2000 QUAY BARBER MODELS 174 Si ZO Falok RI v ut S SEMIKIT $11995 EPOXY/CLASS/FOAM/BALSAKIT$15495 CONSTRUCTION WITH DRAWINGS AND DATA FOR FORMULA 120216 7774172 PYLON SPORT OR STANDOFF SCALE FULL OR SEMIKITSCosmic 8 10 lbs weightWind 790 sq wing areaSEMIKIT $10995 60 2 stroke 12 4 stroke KIT $14495 skit prices plus shipping ecredit cards welcome Ohio residents add 6 % S Other kits coming 27106 Butternut RidgeNorth Olmeted Ohio 44070 Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH KAB Micro-Balloons FILLER K&B SUPER PONY RESIN K&B SUPER PONY THINNER K&B SUPER PONY PRIMER K&B SUPER PONY PAINT K&B MIXING CUPS Glen lost outboard wing pic ture shows him refueling plane continued flew approximately 300 laps 700-lap race out board wing obviously de creased maneuverability speed takeoff characteristics have found taking two-compo nent epoxy thinning 25-50% sol vent applying over planked wing area out about three four ribs center section reduced amount fuel oil intrusion conse quently airframe strength main tained especially desirable shrinkable wing coverings used penetrate woods surface two-component epoxy would coverings have tendency peel back melted slight fire heat virtually no protection wood thinned-down clear twocomponent epoxy can also used coating profile fuselage tail sur faces thinning product get very little build-up wood surfaces consequently excellent adhesion shrinkable covering maintained Safety first will remember Jerry Meyer rather serious fire during Slow Rat racing event 1985 Nats result spilled raw fuel airframe extremely hot Gb-Bee battery large amount spilled fuel tarmac around pitting area have enclosed picture Slow Rat ing fueled pint plastic bottle tank filler fully pushed down overflow raw fuel running down inboard wing enormous amount fuel plus fuel ground under neath plane can easily ignited hot day well-charged Gb Bee battery another picture can see large amount fuel spilled ground vicinity pit man starting area fuel aircraft ground vapors can ignited easi ly majority Slow Rat Sport Race aircraft have automatic priming system basically portion overflow tank prime almost always goes exhaust port area piston closed thus allowing large amount fuel exhaust region hot battery applied fire can easily result case Rat Racers quick fills usually found body portion aircraft consequently amount fuel over rear plane during filling minimized addition ma jority engines rear-exhaust types competitors use mini-pipe directs exhaust away airframe best ways prime Rat engine tilt airplane forward squirt small amount fuel pipe allowing run down ex haust port engine pipe elimi nates majority fire hazard ex haust stack directs oil heat residue away fuel tank area Special priming uniflow tank have noticed several Sport Race enthusiasts utilizing uniflow tank arrangement added overflow tube allows priming engine An ingenious meth od used exiting tube virtually upper portion tank mount ing alligator clip side tank pinching flexible line leads exhaust prime tube fill ing tank alligator clip pressed finger thus opening up overflow allowing air escape tank well priming engine priming finished alligator clip mashed shut system becomes sealed except uniflow tube pointing out airstream am enclosing photo showing alligator clip closed position Another area note large alumi num mounting plate used sleevebearing K&B 35 Without ball bearings case engine vibration definite problem extremely strong fuselage section mounting plate must incor porated sour engine runs reduced airspeed will result As always comments appreci ated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 CL Speed/Hem pel Continued page 67 complete line monoline torque con trol units guarantees torque units life price little steep workmanship superb formation check listing end column have asked numerous Speed modelers would contribute some expertise Speed column appears person willing take up offer Ed Jacoby Glen Cove NY has very interesting way forming aluminum wings As discussed telephone enclosed bit information MA column FYI Department Aluminum Wing Panels Flashing Aluminum sold hardware building supply stores material appears very satisfactory purposes As sold temper approximately half-hard thick ness 012 have found material 14-in wide rolls less $1 per foot Please refer sketch Step 1 Lay out half-span panel shown cut out sharp model ers knife such No 11 X-Acto Step 2 De-burr edges Step 3 Bend panel leading edge line have access bending brake great reasonable substi tute can made using length 1/2 x 3/4-in maple motor mount materi al See sketches Bend panel beyond 90 possible Step 4 Rough up inside surfaces trailing edge 80-grit sand paper Glue two surfaces together Hobbypoxy Formula II Spread epoxy out thin keep other surfaces clean alcohol Step 5 Protect workbench waxed paper clamp trailing edge down using spreader bar shown spreader bar used apply evenly150 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AdaneMaine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices
Edition: Model Aviation - 1986/04
Page Numbers: 66, 149, 150
Control Line Racing John Ballard WINTER months Midwest area bring engine-testing flying halt short days low temperatures keep us inside doing winter building projects Several readers Chicago Cleveland Detroit Wisconsin have written concerning building proj ects possible information various products product earning creditable mention finishing new Goodyear Sport Race airplanes 1986 prod uct introduced last year Pettit Fast Fill brought out almost year ago Kenneth Williams Hobbypoxy sales manager wrote asking opinion product extremely light weight filled well felt sanded hard Apparently other people thought too first year sent let ter another sample product say ing improved Fast Fill incor porate better sanding properties new product has same good filling light weight now sands much easier Sport Race summer flying Mid west Profile Sport Race found couple tips apparently mandatory building extremely light 3 5-sleevebearing-powered aircraft several occasions have noticed competitors having problems built-up wing cracking splitting outboard Continued page 149 See alligator clip soldered side Sport Racers fuel tank pinches off flexible priming line during flight yet allows easy priminglovertlow during pit stop clever idea 66 Model Aviation Glen Lee poor luck recent 700-lap Midwest Sport Race p lane lost outboard wing early race MonoKote covering melted fuel soaked raw balsapianked area went though wingfor little eani nave lots fuel nia e ground pote w inter man pusnea open aii way ano bottlelots runnIng down wing gerous situationfor pit fire Lots fuel spilled hot tarmac past p resent pit stops leaves site ripe ignition especially alcohol vapors hot glow plug flier say market isnt exactly awash hot new stuff potential Stunt flier would understatement outstanding exceptions Sig Top Elite both commended continued recogni tion Control Line activity need quality kits reasonably modern designs distressing lack selec tion primary Stunt student Ster ling Models has continued production Ringmaster has discontinued popular thought YAK P-S 1 profile Stunters Midwest has apparently shut down entire line semi-scale profile Stunters Veco/Dumas line such T-Bird Smoothie Chief etc memory No Ruffys Sharks Spit fire Stunters Ares Stuka Stunts Magi cians Skylarksand on particularly distressed learn Carl Goldberg Models has stopped production its Buster/Cosmic Wind Shoestring Stunter series demise Magician last reasonably stuntable non-flapped kits market thus important step ping-stone primary level Stunt pilot loss would severe blow CL activity Along apparently quite few others wrote Goldberg asking reconsider its decision am pleased report plea met some success has resurrected Shoestring Stunt er once available would like use forum thank Goldberg recognizing need would hope company would future consider occasional CL addition its line late founder Carl Goldberg would Im sure pleased com pany continuing tradition sup port aspects modeling Its probably true Control Line ac tivity no longer can support number kits did before big bucks RC became irresistable apparently relentless force marketplace still seems though viable market should generate some effort part manufacturers keep abreast cur rent trends provide CL frater nity well-engineered competitive kits solicit such support stand ready help manufacturer desirous fill ing needs popularity RC has indeed caused some consternation part Control Liners also true along modelers have enjoyed proliferation available hardware generally useful CL RC especially true control fixtures horns pushrods connectors forth piece control system uniquely Control Line however bellcrank increased popu larity ever-larger Stunters commer cially-available bellcranks generally three-inch size have reached limit capability Control forces simply too large handled efficiently Fortu nately commercial alternatives becoming available have recently received advance sample new LR Products Ltd twoline bellcrank product No C-25 31A-inch metal crank 7A-in arm pushrod should ideal con trol horn arms having lengths % 1i/ front-Up-line planform small amount self-center ing geometry built ie axis rota tion offset lead-out attachpoint unit should available shortly hobby dealer list price will $3 LR also produces 2%-in version may ideal AA size addition SST Products 28746 West field Livonia MI 48150 manufacturing 34-in four-inch plastic cranks very lightweight available mall price $4 last source Fancher 3-in circular crank available mall order Mark Pollard 5412 Brophy Dr Fremont CA 94536 Its machined aluminum priced $10 plus 75 cents postage handling Next month have imported great expense dime wilds New Joisey wit wisdom Lou Dudka Glen Meador discuss extremely popular Supertigre 60 care feeding thereof Enjoy Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Racing/Ballard Continued page 66 inboard sideand longer races wing may fall off foil otherwise excellent run majority people making built-up airframe quarter- halfinch leading edge covering MonoKote some other type shrink able covering problem begins sleeve-bearing engines develop considerable amount vibration causing small cracks delaminations form covering around center section planked areas exhaust running over outboard planked area would quickly become fuel- oil-saturated lose strength resulting lost out board wings addition low-intro 3lo-5o fuel increases potential flammability its large percentage contained metha nol am enclosing picture Glen Lees Sport Racer taken during 700-lap race iro pit stops engine caught airframe fire just se cond two MonoKote covering burned away next pit stop Tuned Pipe Clamp $250** pipe included CLEANER Polisher Glider Pilots Take Note P-Cia 171 3 Tuned Pipe Clamp ood 5000 $149** pipe included U Add $175 Add $050 Shipping Handling Dealer-Dist lnqwries Invited GRAPHICS STRIPING TAPE 60 feet price 36 3 sizes package / 6 /8 -4 14 77 O0VTE 4208R dH hrnPA April 1986 149 THE ONE THAT WORKS PRO-CLAMP ITS SNAP SUPER SHINE SUPER SLICK 8oz $4 95* L WANNA RACE IJADIJAT AOA L BEGINNER RACES 0 * FORM-i Instructions 5 Programs Information Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVE FRANKLIN MASS 02038 Tel 611 528-4043 203 673-2000 QUAY BARBER MODELS 174 Si ZO Falok RI v ut S SEMIKIT $11995 EPOXY/CLASS/FOAM/BALSAKIT$15495 CONSTRUCTION WITH DRAWINGS AND DATA FOR FORMULA 120216 7774172 PYLON SPORT OR STANDOFF SCALE FULL OR SEMIKITSCosmic 8 10 lbs weightWind 790 sq wing areaSEMIKIT $10995 60 2 stroke 12 4 stroke KIT $14495 skit prices plus shipping ecredit cards welcome Ohio residents add 6 % S Other kits coming 27106 Butternut RidgeNorth Olmeted Ohio 44070 Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH KAB Micro-Balloons FILLER K&B SUPER PONY RESIN K&B SUPER PONY THINNER K&B SUPER PONY PRIMER K&B SUPER PONY PAINT K&B MIXING CUPS Glen lost outboard wing pic ture shows him refueling plane continued flew approximately 300 laps 700-lap race out board wing obviously de creased maneuverability speed takeoff characteristics have found taking two-compo nent epoxy thinning 25-50% sol vent applying over planked wing area out about three four ribs center section reduced amount fuel oil intrusion conse quently airframe strength main tained especially desirable shrinkable wing coverings used penetrate woods surface two-component epoxy would coverings have tendency peel back melted slight fire heat virtually no protection wood thinned-down clear twocomponent epoxy can also used coating profile fuselage tail sur faces thinning product get very little build-up wood surfaces consequently excellent adhesion shrinkable covering maintained Safety first will remember Jerry Meyer rather serious fire during Slow Rat racing event 1985 Nats result spilled raw fuel airframe extremely hot Gb-Bee battery large amount spilled fuel tarmac around pitting area have enclosed picture Slow Rat ing fueled pint plastic bottle tank filler fully pushed down overflow raw fuel running down inboard wing enormous amount fuel plus fuel ground under neath plane can easily ignited hot day well-charged Gb Bee battery another picture can see large amount fuel spilled ground vicinity pit man starting area fuel aircraft ground vapors can ignited easi ly majority Slow Rat Sport Race aircraft have automatic priming system basically portion overflow tank prime almost always goes exhaust port area piston closed thus allowing large amount fuel exhaust region hot battery applied fire can easily result case Rat Racers quick fills usually found body portion aircraft consequently amount fuel over rear plane during filling minimized addition ma jority engines rear-exhaust types competitors use mini-pipe directs exhaust away airframe best ways prime Rat engine tilt airplane forward squirt small amount fuel pipe allowing run down ex haust port engine pipe elimi nates majority fire hazard ex haust stack directs oil heat residue away fuel tank area Special priming uniflow tank have noticed several Sport Race enthusiasts utilizing uniflow tank arrangement added overflow tube allows priming engine An ingenious meth od used exiting tube virtually upper portion tank mount ing alligator clip side tank pinching flexible line leads exhaust prime tube fill ing tank alligator clip pressed finger thus opening up overflow allowing air escape tank well priming engine priming finished alligator clip mashed shut system becomes sealed except uniflow tube pointing out airstream am enclosing photo showing alligator clip closed position Another area note large alumi num mounting plate used sleevebearing K&B 35 Without ball bearings case engine vibration definite problem extremely strong fuselage section mounting plate must incor porated sour engine runs reduced airspeed will result As always comments appreci ated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 CL Speed/Hem pel Continued page 67 complete line monoline torque con trol units guarantees torque units life price little steep workmanship superb formation check listing end column have asked numerous Speed modelers would contribute some expertise Speed column appears person willing take up offer Ed Jacoby Glen Cove NY has very interesting way forming aluminum wings As discussed telephone enclosed bit information MA column FYI Department Aluminum Wing Panels Flashing Aluminum sold hardware building supply stores material appears very satisfactory purposes As sold temper approximately half-hard thick ness 012 have found material 14-in wide rolls less $1 per foot Please refer sketch Step 1 Lay out half-span panel shown cut out sharp model ers knife such No 11 X-Acto Step 2 De-burr edges Step 3 Bend panel leading edge line have access bending brake great reasonable substi tute can made using length 1/2 x 3/4-in maple motor mount materi al See sketches Bend panel beyond 90 possible Step 4 Rough up inside surfaces trailing edge 80-grit sand paper Glue two surfaces together Hobbypoxy Formula II Spread epoxy out thin keep other surfaces clean alcohol Step 5 Protect workbench waxed paper clamp trailing edge down using spreader bar shown spreader bar used apply evenly150 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AdaneMaine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices