NEW MODEL Scale Racing past few years increased growth Racing events has part Mouse Scale Racing general very limited number fullscale racers can accurately scaled down use event Generally fuselage and/or wing location makes unsatisfactory mounting 15 engine fuel shutoff fuel tank Finding full-scale aircraft good fly ing characteristics also satisfies re quired caveats Control Line use difficult early history Scale Racing first subjects produced model excel lent flying characteristics Falcon Special found Midget Mustang lent itself nicely exhaust megaphone middle Sev enties brought Little Quickie could also used megaphone pipe Occasion ally few different aircraft seen numbers still overshadowed accepted winners Leo Wittenberg has scaled Ohm Special 15 meets prerequisites Control Line Scale Racing particular aircraft has wing highest aspect ratio wingspan-to-chord ratioEd full-scale racer seen date wing long slender makes good stability during windy flying conditions fuselage large enough accommodate engine tank fuel shutoff rear fuselage stout enough withstand hard land ings scaled-up elevator satisfactory allowable 15% increase area adequate good control month thought would share simple construction techniques have included Larry Dziaks photographs construction Wing Construction consists bottom panel /16 hard balsa /16 plywood center plate bellerank mount leading edge / x %-in spruce trailing edge 007-in lam mated carbon fiber parts glued place slow-cure Hobbypoxy similar ep oxy cement might mention use waxed pa per under wing section avoid having excess epoxy adhere building board dries spar tapered % center / tip cemented place An other piece /26 plywood bellerank attach ment area further strengthens region gives full /8-in-thick bellerank mount use %-in-sq balsa ribs tapering spar forward leading edge aft carbon fiber trailing edge Some A-in blocks glued over /26 bottom sheeting last 2 wing tip strengthen area sanded airfoil shape use /26 wire hooked drill puncture ribs lead-out wires guide along tended route lead-outs easily punc tures through ribs tip bellcrank assures holes aligned properly mount bellerank pushrod lead out wires install inspection hatch also mount 2-56 screws /26 plywood hold hatch cover place build small lip front hatch has tongue-andgroove effect held down two recessed rear screws check controls move freely through channel sheet top /16 balsa using slow-cure Hobbypoxy Fuselage generally use -in-thick hard balsa fuselage light-grained hard maple % x -in engine mounts addition use spar runs lower engine mount completely through tail skid mount prevents fuselage cracking tail skid mount /8 x spruce use recessed maple hard wood provide solid mount landing gear typically uses Glen Lee 150 tita nium struts Icover back past wing /62 plywood order strengthen nose both sides also use extremely hard piece %-in balsa apple cheek inboard side will notice recessed tank mount engine fuel shutoff a11 easily placed front Racer usual problem cramped space use -in-thick piece 6061 T-6 alu minum plate drilled tapped engine generally like use cylindrical Rat tank modified 2-3-oz capacity addition cut fill tube off does extend above top line fuselage Elevator Since elevator fairly large na ture would suggest using /8 x A-in spruce both its front flap portions So avoid vibration high speed keep /8-in elevator extremely rigid old K&B internal-mount el evator horn seems work well Plastic internal hinges can used desired avoid stab breakage model flips over landing use 3/16-in balsa sandwiched tween /64 plywood sanded shape extremely hard damage-resistant After assembly use -oz fiberglass cloth K&B epoxy filler resin careful thin epoxy ap proximately 25% buildup will kept minimum Embed glass carefully keep added weight down Finished airframe weight 18-23 oz depend ing weight wood selected brand engine used Refer photos get better overview model constructed think will agree Racer has poten tial have problems questions about drop line can also supply construction drawings cost Let know Ohm Special flies 1990 FAI Team Race team selection CL Speed Racing Team Selection Committee has decided US FAL TR team would se lected single-site finals meet will run Continued page 157 August 1989 71 Conoi Line Racing John Ballard 10102 Kimblewick Dr Louisville KY 40223 Construction details Ohm Special Scale Racer author John Ballard comments month L-R Inboard wing tip area shows spars ribs leadouts internal connectors carbon fiber trailing edge insert dark line inspection hatch overall view inboard wing belicrank mounted shows carbon fiber TE basic fuselage nose area hardwood engine mounts full-length spar installed Ohm Special construction details L-R Nearly complete fuselage structure shows engine tank/shutoff cutouts hardwood landing gear mounting block insert piwood doublers lightening holes lower hardwood brace stabilizer spruce spars aft fuselage details internal pushrod routing elevator horn cove assembled Racer engine tank shutoff mounted Theres lots com petition profile-type Racer meeets eye Stresses competition require strength rigidity Note engine mounted aluminum plate CL Racing/Ballard Continued page 71 over two-day period total six rounds being flown three per day Participants final scores will average three fastest heats US team will composed three teams best scores event will held Dick Scobec Memo rial Field Houston TX October 7-8 1989 Host club will Clear Lake Line Winders Contest Director will Frank Williams Discus sion contest procedures processing models will occur Friday evening October 6 can contact Frank Williams 1-713/4881371 motel site directions As always solicit welcome comments photos CL Speed/Hem pel Continued page 72 Nick manufactures complete line Speed pans latest offering Formula 40 Speed event casting exceptional work manship price $2495 including postage handling Send Nick stamped selfaddressed envelope SASE information other items available FAI Speed pan Nelson Competition En gines machined solid bar stock pan copy built USSRs Kal mykov can check out original pan photo Speed column February 1989 issue magazine pan costs $35 plus $3 postage Henry Nelson has number items useful Speed modeler item have found suitable 21 Sport Speed IA-in dia aluminum spinner complete list ing Nelsons products send SASE Nelson Competition Engines RD 2 Box 233 Ramsey Rd Zelienople PA 16063 Jigging Putty Eastwood Co com pany specializes tools techniques auto motive restorations Jigging Putty very handy hold parts position being welded soldered brazed can shield sur faces welding heat damage also acts heat sink eliminate reduce heat dis tortion great product use youre trying repair good tuned pipe just bit dirt Jigging Putty reusable comes convenient 2-lb pail storage cost $1595 plus shipping Eastwood Co also stocks new alumi num welding rods can used ordi nary propane torch information about companys products write Eastwood Co 580 Lancaster Ave PO Box 296 Malvern PA 10355 Aluminum Paste Leichtung Work shops 4944 Commerce Parkway Cleveland OH l28 stuff provides neatest fastest way weld repair aluminum Ive ever seen youve never welded before dont need welding equipment make joints patches anything aluminum Just apply bead paste required apply heat evenly propane torch 7JO F until paste flows turns white finished joint will stronger base metal will oxidize write folks informa tion purchase products please sure tell heard about Model Aviation CL Speed column have information new products available modelers please mail will compile list publish later date share sure remember mail ideas suggestions still holding back Top Gun/Jenkins Continued page 84 stood its nose center stand good top view judge own rotating stand models moved down line evaluated consecutively Since no time constraint judging Friday process took little longer anticipated day However did make accurate independent static scores Following static judging field everyone invited fabulous cocktail party plush Westin Hotel headquar ters invitational Bob Underwood down Virginia well-worn Russian bomber twinengined Petlyakov PE-2 first fly Saturday Bob likes A-scale beauty much hes built four weighing around 14 lb 82in wsngspan Bob chose two Enya 53 fourcycles power uses 11 x 7 props Bob August 1989 157 Kaimbach Publishing Co 1027 N 7th St Milwaukee WI 53233
Edition: Model Aviation - 1989/08
Page Numbers: 71, 157
Edition: Model Aviation - 1989/08
Page Numbers: 71, 157
NEW MODEL Scale Racing past few years increased growth Racing events has part Mouse Scale Racing general very limited number fullscale racers can accurately scaled down use event Generally fuselage and/or wing location makes unsatisfactory mounting 15 engine fuel shutoff fuel tank Finding full-scale aircraft good fly ing characteristics also satisfies re quired caveats Control Line use difficult early history Scale Racing first subjects produced model excel lent flying characteristics Falcon Special found Midget Mustang lent itself nicely exhaust megaphone middle Sev enties brought Little Quickie could also used megaphone pipe Occasion ally few different aircraft seen numbers still overshadowed accepted winners Leo Wittenberg has scaled Ohm Special 15 meets prerequisites Control Line Scale Racing particular aircraft has wing highest aspect ratio wingspan-to-chord ratioEd full-scale racer seen date wing long slender makes good stability during windy flying conditions fuselage large enough accommodate engine tank fuel shutoff rear fuselage stout enough withstand hard land ings scaled-up elevator satisfactory allowable 15% increase area adequate good control month thought would share simple construction techniques have included Larry Dziaks photographs construction Wing Construction consists bottom panel /16 hard balsa /16 plywood center plate bellerank mount leading edge / x %-in spruce trailing edge 007-in lam mated carbon fiber parts glued place slow-cure Hobbypoxy similar ep oxy cement might mention use waxed pa per under wing section avoid having excess epoxy adhere building board dries spar tapered % center / tip cemented place An other piece /26 plywood bellerank attach ment area further strengthens region gives full /8-in-thick bellerank mount use %-in-sq balsa ribs tapering spar forward leading edge aft carbon fiber trailing edge Some A-in blocks glued over /26 bottom sheeting last 2 wing tip strengthen area sanded airfoil shape use /26 wire hooked drill puncture ribs lead-out wires guide along tended route lead-outs easily punc tures through ribs tip bellcrank assures holes aligned properly mount bellerank pushrod lead out wires install inspection hatch also mount 2-56 screws /26 plywood hold hatch cover place build small lip front hatch has tongue-andgroove effect held down two recessed rear screws check controls move freely through channel sheet top /16 balsa using slow-cure Hobbypoxy Fuselage generally use -in-thick hard balsa fuselage light-grained hard maple % x -in engine mounts addition use spar runs lower engine mount completely through tail skid mount prevents fuselage cracking tail skid mount /8 x spruce use recessed maple hard wood provide solid mount landing gear typically uses Glen Lee 150 tita nium struts Icover back past wing /62 plywood order strengthen nose both sides also use extremely hard piece %-in balsa apple cheek inboard side will notice recessed tank mount engine fuel shutoff a11 easily placed front Racer usual problem cramped space use -in-thick piece 6061 T-6 alu minum plate drilled tapped engine generally like use cylindrical Rat tank modified 2-3-oz capacity addition cut fill tube off does extend above top line fuselage Elevator Since elevator fairly large na ture would suggest using /8 x A-in spruce both its front flap portions So avoid vibration high speed keep /8-in elevator extremely rigid old K&B internal-mount el evator horn seems work well Plastic internal hinges can used desired avoid stab breakage model flips over landing use 3/16-in balsa sandwiched tween /64 plywood sanded shape extremely hard damage-resistant After assembly use -oz fiberglass cloth K&B epoxy filler resin careful thin epoxy ap proximately 25% buildup will kept minimum Embed glass carefully keep added weight down Finished airframe weight 18-23 oz depend ing weight wood selected brand engine used Refer photos get better overview model constructed think will agree Racer has poten tial have problems questions about drop line can also supply construction drawings cost Let know Ohm Special flies 1990 FAI Team Race team selection CL Speed Racing Team Selection Committee has decided US FAL TR team would se lected single-site finals meet will run Continued page 157 August 1989 71 Conoi Line Racing John Ballard 10102 Kimblewick Dr Louisville KY 40223 Construction details Ohm Special Scale Racer author John Ballard comments month L-R Inboard wing tip area shows spars ribs leadouts internal connectors carbon fiber trailing edge insert dark line inspection hatch overall view inboard wing belicrank mounted shows carbon fiber TE basic fuselage nose area hardwood engine mounts full-length spar installed Ohm Special construction details L-R Nearly complete fuselage structure shows engine tank/shutoff cutouts hardwood landing gear mounting block insert piwood doublers lightening holes lower hardwood brace stabilizer spruce spars aft fuselage details internal pushrod routing elevator horn cove assembled Racer engine tank shutoff mounted Theres lots com petition profile-type Racer meeets eye Stresses competition require strength rigidity Note engine mounted aluminum plate CL Racing/Ballard Continued page 71 over two-day period total six rounds being flown three per day Participants final scores will average three fastest heats US team will composed three teams best scores event will held Dick Scobec Memo rial Field Houston TX October 7-8 1989 Host club will Clear Lake Line Winders Contest Director will Frank Williams Discus sion contest procedures processing models will occur Friday evening October 6 can contact Frank Williams 1-713/4881371 motel site directions As always solicit welcome comments photos CL Speed/Hem pel Continued page 72 Nick manufactures complete line Speed pans latest offering Formula 40 Speed event casting exceptional work manship price $2495 including postage handling Send Nick stamped selfaddressed envelope SASE information other items available FAI Speed pan Nelson Competition En gines machined solid bar stock pan copy built USSRs Kal mykov can check out original pan photo Speed column February 1989 issue magazine pan costs $35 plus $3 postage Henry Nelson has number items useful Speed modeler item have found suitable 21 Sport Speed IA-in dia aluminum spinner complete list ing Nelsons products send SASE Nelson Competition Engines RD 2 Box 233 Ramsey Rd Zelienople PA 16063 Jigging Putty Eastwood Co com pany specializes tools techniques auto motive restorations Jigging Putty very handy hold parts position being welded soldered brazed can shield sur faces welding heat damage also acts heat sink eliminate reduce heat dis tortion great product use youre trying repair good tuned pipe just bit dirt Jigging Putty reusable comes convenient 2-lb pail storage cost $1595 plus shipping Eastwood Co also stocks new alumi num welding rods can used ordi nary propane torch information about companys products write Eastwood Co 580 Lancaster Ave PO Box 296 Malvern PA 10355 Aluminum Paste Leichtung Work shops 4944 Commerce Parkway Cleveland OH l28 stuff provides neatest fastest way weld repair aluminum Ive ever seen youve never welded before dont need welding equipment make joints patches anything aluminum Just apply bead paste required apply heat evenly propane torch 7JO F until paste flows turns white finished joint will stronger base metal will oxidize write folks informa tion purchase products please sure tell heard about Model Aviation CL Speed column have information new products available modelers please mail will compile list publish later date share sure remember mail ideas suggestions still holding back Top Gun/Jenkins Continued page 84 stood its nose center stand good top view judge own rotating stand models moved down line evaluated consecutively Since no time constraint judging Friday process took little longer anticipated day However did make accurate independent static scores Following static judging field everyone invited fabulous cocktail party plush Westin Hotel headquar ters invitational Bob Underwood down Virginia well-worn Russian bomber twinengined Petlyakov PE-2 first fly Saturday Bob likes A-scale beauty much hes built four weighing around 14 lb 82in wsngspan Bob chose two Enya 53 fourcycles power uses 11 x 7 props Bob August 1989 157 Kaimbach Publishing Co 1027 N 7th St Milwaukee WI 53233
