CONTROL LINE AEROBATICS WITHOUT GETTING TOO ESOTERIC Ill continue discussion building good-flying Precision Aerobatics models focusing building light Few Stunt fliers have ever said models too light fewer still could consistently create exceptional-looking exceptional-performing airplanes drove down limits dont believe Aerobatics models can built too light fly better build lighter assuming maintain structural integrity stiffness articles have seen read airplane weighed 66 ounces believe can made 61 ounces have said words myself times have gotten better throughout years Al Rabe Bill Werwage Bob Gieseke modelers have kept models low end scale Constructing light Stunters starts disciplineit may seem strange touches areas Consider components weight Light true accurate structures take time must built induced residual stress Wood selection important important controlling other factors assuming dont get carried away Associated accurate structures precise joints structure should properly aligned stress minimum amount adhesive possible should used make structure airworthy structures use lightest adhesive will job overtime know Ill get some comments have preferences use quick-setting cyanoacrylate CyA glue majority construction use slow-setting 15-25 seconds glue work requires positioning certain pieces such carbon pre preg tow laminating fuselage formers crossgrain 1As sheet 1A2 plywood 3A2 balsa cut Y4 reinforced Kwik Set around interior cutout use Hobbypoxy Smooth N Easy blue box relatively thin 20-minute-set epoxy glue/finishing resin nose section doublers mounts top blocks complete nose section shaped hollowed ready final touches coat inside Smooth N Easy lock everything together make fuelproof help penetration flow apply heat hair dryer Ive used clear silicone hold tanks 5-minute epoxy hold canopies variety other adhesives Try remember main point use minimum amountthats save weight models flying machines term airworthy mean should strong enough sustain airloads last indefinitelya fine line walk try build light possible competition Stunter supposed crash shouldnt built/designed survive crashes Al Rabe mostacknowledged lightweight designers used dissect wreckage investigate could reduce structure change design save few grams general Stunt models structurally overdesigned However avoid reducing structure nose section wing center section including bellcrank mounts landing gear mountspaying strict attention stress factors provides longevity piece structure should tied airplanes exterior skin maybe difficult some areas models long-term integrity stake Because single-cylinder engines nature impossible fully suppress engine vibration stress management dampens Controlling stress structure reaps some benefits can control vibration efficiently should able reduce interior 126 Model Aviation h Trostle R Ted Fanchers Classics last Vintage Stunt Championships Dick Mathis Chizlers 05 35 power Don Hutchison shows off Moitle OldTimer Vintage Stunt Championships model excellent performer October 1996 SeeBree Hayes Memorial Meet pit area Great Ron Cooks stunning Trivial Pursuit powered PA 40 pipe turnout Whittier Narrows Recreation Center southern CA 57 ounces should outstanding performer structure long preserve stress transfer Its possible especially move farther away forward center airplane Al Rabe used carve away Dremel tool much wing structure inside skin possible Bill Werwage significantly reduced tail structure unsheeted Wasren truss stab/elevators maintaining sufficient stiffness design considerations potential weight advantages wing consider spar cross-section typically maintained center tip strength requirements across span diminish approaching tip consider barbell effectweight extremities multiplies upsets aircraft stabilityyou want reduce structure weight go out center gravity CU built-up wing structures taper spars leading edge/trailing edge planking foam wings decreasing thickness foam toward tip viable dont like planform cutouts some people suggest have wing-mounted gear laminate clips rib reinforcements Lite Ply Use two bolts instead four substitute aluminum 4-40 cap screws alloy screws aluminum acceptable except engine mounting wingtips next years Ive used well-hollowed tips best could 9-10 ounce both tips adjustable tip weight box leadout guide going 1/ sheet balsa outlines can save 2-4 ounces tail surfaces Ive used t vertical stabilizers years Ive used built-up 1A6sheet-covered surfacesweightwise approaches toss-up However dont tempted use t cutting out inserting ribs fuselage last because Ive already mentioned skimp nose section section aft CU can make real gains because evesy gram saved multiplies moment doubled maintain same balance point instance save 1 gram 14 multiplier equals 14 grams plus 14 ahead CU balance equals 28 grams Thats significant can disregard convention go 3A2 sides instead ain ngidity strength suggest mold top bottom sections also 3A2 balsa takes time because have work up molds can amortized over several models Rigidity will maintained accurate formers resulting molding process curvature shells once locked down Remember Sand shells oaly male mold havent mentioned integrating composites structure design primary thing some research new products continuously developed used such tapered spar reinforcements thick center taper tip thickness planform Incorporating new composites requires structure redesign using described principles Already popular gaining increasing public exposure 2-ounce carbon veil covering material Ive used several airplanes lives up its claims Application methods using dope work well nitrate method uses thinned nitrate dope applied directiy through veil well-sanded raw balsa butyrate method use applies veil balsa has 2-3 coats dope either method veil sanded after several coats dope several coats added followed filler primary advantage veil forms very stable light hard surface shell Since hardness Garb Covers Glow Engines Dirt moisture cleaning solvents sneak through available opening cially carburetor muffler outlets close door such predators power simply seal outlets durable vinyl caps before cleaning engine storing winter package Garb Covers contains eight total caps four sizes S M L XL fit size glow engine Pick up pack today. help protect engines performance Cap engines outlets Carb Covers before cleaning storage dirt moisture door Don Anderson President Founder Great Planes Model Mt g location dealer nearest please call 1-800-682-8948 mention code number 0412H Distnbuted Exclusively Thrnugh GREAT PLANES MODEL OS R ROTORS COMPAN P0 505 9021 CHAMPAIGN 6 826 952 0 p g 9960 9 July1997 127 own glow engine cant afford NOT protect Great Planes inexpensive Carb Covers Fiberglass Parts available Lanier RO Inc Contact us fax 770-532-2163 information catalog send self-addressed stamped envelope P 0 Box 458 Oakwood GA 30566 II6 SBD 96 6 26 Tigvrhark P91 lIMs Ps 910i99911 DISTRIBUTING2059741307 EIV1EEI620 CR 324 Moulton AL 35650 FAX 205974-5542 depends dope ultimate hardness will develop several monthsespecially butyrate doesnt harden rapidly nitrate As mentioned veil makes superior covering solid surfaces will cover open bays wings woven cloth fragile apply sand until has some dope strengthen have used veil multiple layers nose section strengthen shape surface low spots Just dope patches sand Another area thought saw real gain laminating Laminating veil epoxy center no benefit same infusing composites structures realize gain strength potential structure reduction achieved pushing composite surface structure Im leaving out exotic applications Ive heard about such Paul Walkers carbon spar requires autoclave properly set epoxy Dan Winship has talked about carbon-shell wings lald up foam component autoclaved dissolving foam approaches mature projects require significant amount time conceive execute perhaps someday mull over factors necessarily brief survey should realize cant build light quickly take time things right New Items Dick Byron has photographed outstanding Precision Aerobatics fliers/airplanes action years has decided sell 20 x 30 enlargements recommend capture essence flight suitable framing hang enthusiasts shop den Also avallable pictures World Scale Competitions Dick has parricipated US team member Contact Dick Byron Big D AeroArt 1812 Castle Rd Arlington TX76014Tel 817461-7705 rful pair fast nd easy engine starts TORQMASTERTM 1 2V ELECTRIC STARTERS Rugged economicalwith enormous starting muscle 90 Deluxe engines up 90 cu 180 Heavy-Dub engines up 180 cu Available alligator clips 12V field battery use banana s power panels POWERCORE MKIITM 1 2V STARTER POWER PACK Compact cordless power source lets use electric starter anywherel MICRO DIGITAL MOTOR CONTROLLERS w SAFE NO GLITCH POVER ON SOFT LOV TORQUE \START UP HIGH RATE ALL SIZE LIGHT VEIGHT SELF ALIGNS TO YOUR TRANSMITTER NO ADJUSTMENT NECESSARY MICRO DEMON 100 2OAMP 1-14CELL 12 x085 xO39a 1 3g/46oz wires 4700Hz includes setup LED 995 *NtJIJ* MICRODEMON 102 *NSJI1* 2OAMP 6-8cELL BEC BRAKE 21g175oz wires 4700Hz 18 xOS5 xO 39 includes setup LED$5995 SPEED DEMON 200 35AMP 1-16CELL 16 xl OxO42 26g/92oz wires 2400Hz$8295 VIPER MODEL PRODUCTS 3475 Edison Way Suite Menlo Park CA 94025 1-S00-5g28473 VISA MASTERCARD ElevonMixer ELECTRONIC MIXER elevons v-tails flaps spoilers Ultra-simple setup aod installation Rugged microprocessorbasad design 100% electrooic tsr high reli ability Simply cosnecto betwees servos receiver Peatures semo reoersisg tour ditterect mining rules allow tailor miser seeds model Will overdrive semos nytioss selected simple dip switch Made USA designed work popular radio systemsAM PM PCM Very low power consumption Size fSnll9o Sd Weight ll250Z Less radio consectors Part Ns 0A $3095 lass sennecters $3885 eonplate AccessorySwitch ACCESSORY SWITCH gives ability add oriott function channel secriticing chan nels ability control semo Accesuoryllwitch designed switch 11030 volts up 30 amps man power dinsipotion 300 watts Modern microprocessor ryllwitch very simple setup installlust connect between semo receiver channel choose oft points selected simple dip switches 16 different valses LED indicator help setup Unit automatically turns off transmitter oft Made USA designed work popular radio systems Small size f0o09ll o Sd Weight 12 oz Low power consumphon Less radio connector Part No 0U $3495 Comptete nyntems cod otherprodsctn available planeo cars cod boats call write detallo GlowDriver ON-BOARD GLOW DRIVER makes stalling easier safer Keeps glow ping hot lust engine needs Microproc esour-based design simply connects between throttle semo receiver Reversi ble user-selectable nfl points Can easily drive two-cylinder twin-engine models Unit automatically turns oft trunuwitter oft 100% electronic Made USA und designed work popular radio systems Very small size 17 0 12 5 Sd Weight lldsz Low power consumption Comes web battery/plug wire less connectors cell avd plug clip Part No EA $3495 LiUI LS] Lel 4 1 SPCIALISTS IN COX AND AME ENGINES & CUSTOM PARTS COMPETITION ACCCESSORIES RACING WHEELS SOLID LINES CUSTOM NEEDLE VALVES OLD TIMER KITS & SUPPLIES COILS CONDENSERS PLUGS SILK QUALITY DOPE BRUSHES TRANSISTOR IGNITION SYSTEMS 112A TEXACO PLAYBOY SR KIT PH 619 761-0511 FAX 761-0937 VISA IMC WELCOME NO COD MINIMUM ORDER $1000 PLUS $300 SHIPPING INSURANCE $200 128 Model Aviation 21 Less currrntcrn Part No OA $4095 PO Eon 3129 COePSO Ceelsnr TX 79493-31 29 Send tsr 0R5ER5& SF0 012 014-0a43IOuS7PM DaLn CT FREE add $450 S&H par order CusToUER SEsorce FAX & AFTER Houes 512 814-5843 CataInd TX Faa add 775% ten
Edition: Model Aviation - 1997/07
Page Numbers: 126, 127, 128
Edition: Model Aviation - 1997/07
Page Numbers: 126, 127, 128
CONTROL LINE AEROBATICS WITHOUT GETTING TOO ESOTERIC Ill continue discussion building good-flying Precision Aerobatics models focusing building light Few Stunt fliers have ever said models too light fewer still could consistently create exceptional-looking exceptional-performing airplanes drove down limits dont believe Aerobatics models can built too light fly better build lighter assuming maintain structural integrity stiffness articles have seen read airplane weighed 66 ounces believe can made 61 ounces have said words myself times have gotten better throughout years Al Rabe Bill Werwage Bob Gieseke modelers have kept models low end scale Constructing light Stunters starts disciplineit may seem strange touches areas Consider components weight Light true accurate structures take time must built induced residual stress Wood selection important important controlling other factors assuming dont get carried away Associated accurate structures precise joints structure should properly aligned stress minimum amount adhesive possible should used make structure airworthy structures use lightest adhesive will job overtime know Ill get some comments have preferences use quick-setting cyanoacrylate CyA glue majority construction use slow-setting 15-25 seconds glue work requires positioning certain pieces such carbon pre preg tow laminating fuselage formers crossgrain 1As sheet 1A2 plywood 3A2 balsa cut Y4 reinforced Kwik Set around interior cutout use Hobbypoxy Smooth N Easy blue box relatively thin 20-minute-set epoxy glue/finishing resin nose section doublers mounts top blocks complete nose section shaped hollowed ready final touches coat inside Smooth N Easy lock everything together make fuelproof help penetration flow apply heat hair dryer Ive used clear silicone hold tanks 5-minute epoxy hold canopies variety other adhesives Try remember main point use minimum amountthats save weight models flying machines term airworthy mean should strong enough sustain airloads last indefinitelya fine line walk try build light possible competition Stunter supposed crash shouldnt built/designed survive crashes Al Rabe mostacknowledged lightweight designers used dissect wreckage investigate could reduce structure change design save few grams general Stunt models structurally overdesigned However avoid reducing structure nose section wing center section including bellcrank mounts landing gear mountspaying strict attention stress factors provides longevity piece structure should tied airplanes exterior skin maybe difficult some areas models long-term integrity stake Because single-cylinder engines nature impossible fully suppress engine vibration stress management dampens Controlling stress structure reaps some benefits can control vibration efficiently should able reduce interior 126 Model Aviation h Trostle R Ted Fanchers Classics last Vintage Stunt Championships Dick Mathis Chizlers 05 35 power Don Hutchison shows off Moitle OldTimer Vintage Stunt Championships model excellent performer October 1996 SeeBree Hayes Memorial Meet pit area Great Ron Cooks stunning Trivial Pursuit powered PA 40 pipe turnout Whittier Narrows Recreation Center southern CA 57 ounces should outstanding performer structure long preserve stress transfer Its possible especially move farther away forward center airplane Al Rabe used carve away Dremel tool much wing structure inside skin possible Bill Werwage significantly reduced tail structure unsheeted Wasren truss stab/elevators maintaining sufficient stiffness design considerations potential weight advantages wing consider spar cross-section typically maintained center tip strength requirements across span diminish approaching tip consider barbell effectweight extremities multiplies upsets aircraft stabilityyou want reduce structure weight go out center gravity CU built-up wing structures taper spars leading edge/trailing edge planking foam wings decreasing thickness foam toward tip viable dont like planform cutouts some people suggest have wing-mounted gear laminate clips rib reinforcements Lite Ply Use two bolts instead four substitute aluminum 4-40 cap screws alloy screws aluminum acceptable except engine mounting wingtips next years Ive used well-hollowed tips best could 9-10 ounce both tips adjustable tip weight box leadout guide going 1/ sheet balsa outlines can save 2-4 ounces tail surfaces Ive used t vertical stabilizers years Ive used built-up 1A6sheet-covered surfacesweightwise approaches toss-up However dont tempted use t cutting out inserting ribs fuselage last because Ive already mentioned skimp nose section section aft CU can make real gains because evesy gram saved multiplies moment doubled maintain same balance point instance save 1 gram 14 multiplier equals 14 grams plus 14 ahead CU balance equals 28 grams Thats significant can disregard convention go 3A2 sides instead ain ngidity strength suggest mold top bottom sections also 3A2 balsa takes time because have work up molds can amortized over several models Rigidity will maintained accurate formers resulting molding process curvature shells once locked down Remember Sand shells oaly male mold havent mentioned integrating composites structure design primary thing some research new products continuously developed used such tapered spar reinforcements thick center taper tip thickness planform Incorporating new composites requires structure redesign using described principles Already popular gaining increasing public exposure 2-ounce carbon veil covering material Ive used several airplanes lives up its claims Application methods using dope work well nitrate method uses thinned nitrate dope applied directiy through veil well-sanded raw balsa butyrate method use applies veil balsa has 2-3 coats dope either method veil sanded after several coats dope several coats added followed filler primary advantage veil forms very stable light hard surface shell Since hardness Garb Covers Glow Engines Dirt moisture cleaning solvents sneak through available opening cially carburetor muffler outlets close door such predators power simply seal outlets durable vinyl caps before cleaning engine storing winter package Garb Covers contains eight total caps four sizes S M L XL fit size glow engine Pick up pack today. help protect engines performance Cap engines outlets Carb Covers before cleaning storage dirt moisture door Don Anderson President Founder Great Planes Model Mt g location dealer nearest please call 1-800-682-8948 mention code number 0412H Distnbuted Exclusively Thrnugh GREAT PLANES MODEL OS R ROTORS COMPAN P0 505 9021 CHAMPAIGN 6 826 952 0 p g 9960 9 July1997 127 own glow engine cant afford NOT protect Great Planes inexpensive Carb Covers Fiberglass Parts available Lanier RO Inc Contact us fax 770-532-2163 information catalog send self-addressed stamped envelope P 0 Box 458 Oakwood GA 30566 II6 SBD 96 6 26 Tigvrhark P91 lIMs Ps 910i99911 DISTRIBUTING2059741307 EIV1EEI620 CR 324 Moulton AL 35650 FAX 205974-5542 depends dope ultimate hardness will develop several monthsespecially butyrate doesnt harden rapidly nitrate As mentioned veil makes superior covering solid surfaces will cover open bays wings woven cloth fragile apply sand until has some dope strengthen have used veil multiple layers nose section strengthen shape surface low spots Just dope patches sand Another area thought saw real gain laminating Laminating veil epoxy center no benefit same infusing composites structures realize gain strength potential structure reduction achieved pushing composite surface structure Im leaving out exotic applications Ive heard about such Paul Walkers carbon spar requires autoclave properly set epoxy Dan Winship has talked about carbon-shell wings lald up foam component autoclaved dissolving foam approaches mature projects require significant amount time conceive execute perhaps someday mull over factors necessarily brief survey should realize cant build light quickly take time things right New Items Dick Byron has photographed outstanding Precision Aerobatics fliers/airplanes action years has decided sell 20 x 30 enlargements recommend capture essence flight suitable framing hang enthusiasts shop den Also avallable pictures World Scale Competitions Dick has parricipated US team member Contact Dick Byron Big D AeroArt 1812 Castle Rd Arlington TX76014Tel 817461-7705 rful pair fast nd easy engine starts TORQMASTERTM 1 2V ELECTRIC STARTERS Rugged economicalwith enormous starting muscle 90 Deluxe engines up 90 cu 180 Heavy-Dub engines up 180 cu Available alligator clips 12V field battery use banana s power panels POWERCORE MKIITM 1 2V STARTER POWER PACK Compact cordless power source lets use electric starter anywherel MICRO DIGITAL MOTOR CONTROLLERS w SAFE NO GLITCH POVER ON SOFT LOV TORQUE \START UP HIGH RATE ALL SIZE LIGHT VEIGHT SELF ALIGNS TO YOUR TRANSMITTER NO ADJUSTMENT NECESSARY MICRO DEMON 100 2OAMP 1-14CELL 12 x085 xO39a 1 3g/46oz wires 4700Hz includes setup LED 995 *NtJIJ* MICRODEMON 102 *NSJI1* 2OAMP 6-8cELL BEC BRAKE 21g175oz wires 4700Hz 18 xOS5 xO 39 includes setup LED$5995 SPEED DEMON 200 35AMP 1-16CELL 16 xl OxO42 26g/92oz wires 2400Hz$8295 VIPER MODEL PRODUCTS 3475 Edison Way Suite Menlo Park CA 94025 1-S00-5g28473 VISA MASTERCARD ElevonMixer ELECTRONIC MIXER elevons v-tails flaps spoilers Ultra-simple setup aod installation Rugged microprocessorbasad design 100% electrooic tsr high reli ability Simply cosnecto betwees servos receiver Peatures semo reoersisg tour ditterect mining rules allow tailor miser seeds model Will overdrive semos nytioss selected simple dip switch Made USA designed work popular radio systemsAM PM PCM Very low power consumption Size fSnll9o Sd Weight ll250Z Less radio consectors Part Ns 0A $3095 lass sennecters $3885 eonplate AccessorySwitch ACCESSORY SWITCH gives ability add oriott function channel secriticing chan nels ability control semo Accesuoryllwitch designed switch 11030 volts up 30 amps man power dinsipotion 300 watts Modern microprocessor ryllwitch very simple setup installlust connect between semo receiver channel choose oft points selected simple dip switches 16 different valses LED indicator help setup Unit automatically turns off transmitter oft Made USA designed work popular radio systems Small size f0o09ll o Sd Weight 12 oz Low power consumphon Less radio connector Part No 0U $3495 Comptete nyntems cod otherprodsctn available planeo cars cod boats call write detallo GlowDriver ON-BOARD GLOW DRIVER makes stalling easier safer Keeps glow ping hot lust engine needs Microproc esour-based design simply connects between throttle semo receiver Reversi ble user-selectable nfl points Can easily drive two-cylinder twin-engine models Unit automatically turns oft trunuwitter oft 100% electronic Made USA und designed work popular radio systems Very small size 17 0 12 5 Sd Weight lldsz Low power consumption Comes web battery/plug wire less connectors cell avd plug clip Part No EA $3495 LiUI LS] Lel 4 1 SPCIALISTS IN COX AND AME ENGINES & CUSTOM PARTS COMPETITION ACCCESSORIES RACING WHEELS SOLID LINES CUSTOM NEEDLE VALVES OLD TIMER KITS & SUPPLIES COILS CONDENSERS PLUGS SILK QUALITY DOPE BRUSHES TRANSISTOR IGNITION SYSTEMS 112A TEXACO PLAYBOY SR KIT PH 619 761-0511 FAX 761-0937 VISA IMC WELCOME NO COD MINIMUM ORDER $1000 PLUS $300 SHIPPING INSURANCE $200 128 Model Aviation 21 Less currrntcrn Part No OA $4095 PO Eon 3129 COePSO Ceelsnr TX 79493-31 29 Send tsr 0R5ER5& SF0 012 014-0a43IOuS7PM DaLn CT FREE add $450 S&H par order CusToUER SEsorce FAX & AFTER Houes 512 814-5843 CataInd TX Faa add 775% ten
Edition: Model Aviation - 1997/07
Page Numbers: 126, 127, 128
CONTROL LINE AEROBATICS WITHOUT GETTING TOO ESOTERIC Ill continue discussion building good-flying Precision Aerobatics models focusing building light Few Stunt fliers have ever said models too light fewer still could consistently create exceptional-looking exceptional-performing airplanes drove down limits dont believe Aerobatics models can built too light fly better build lighter assuming maintain structural integrity stiffness articles have seen read airplane weighed 66 ounces believe can made 61 ounces have said words myself times have gotten better throughout years Al Rabe Bill Werwage Bob Gieseke modelers have kept models low end scale Constructing light Stunters starts disciplineit may seem strange touches areas Consider components weight Light true accurate structures take time must built induced residual stress Wood selection important important controlling other factors assuming dont get carried away Associated accurate structures precise joints structure should properly aligned stress minimum amount adhesive possible should used make structure airworthy structures use lightest adhesive will job overtime know Ill get some comments have preferences use quick-setting cyanoacrylate CyA glue majority construction use slow-setting 15-25 seconds glue work requires positioning certain pieces such carbon pre preg tow laminating fuselage formers crossgrain 1As sheet 1A2 plywood 3A2 balsa cut Y4 reinforced Kwik Set around interior cutout use Hobbypoxy Smooth N Easy blue box relatively thin 20-minute-set epoxy glue/finishing resin nose section doublers mounts top blocks complete nose section shaped hollowed ready final touches coat inside Smooth N Easy lock everything together make fuelproof help penetration flow apply heat hair dryer Ive used clear silicone hold tanks 5-minute epoxy hold canopies variety other adhesives Try remember main point use minimum amountthats save weight models flying machines term airworthy mean should strong enough sustain airloads last indefinitelya fine line walk try build light possible competition Stunter supposed crash shouldnt built/designed survive crashes Al Rabe mostacknowledged lightweight designers used dissect wreckage investigate could reduce structure change design save few grams general Stunt models structurally overdesigned However avoid reducing structure nose section wing center section including bellcrank mounts landing gear mountspaying strict attention stress factors provides longevity piece structure should tied airplanes exterior skin maybe difficult some areas models long-term integrity stake Because single-cylinder engines nature impossible fully suppress engine vibration stress management dampens Controlling stress structure reaps some benefits can control vibration efficiently should able reduce interior 126 Model Aviation h Trostle R Ted Fanchers Classics last Vintage Stunt Championships Dick Mathis Chizlers 05 35 power Don Hutchison shows off Moitle OldTimer Vintage Stunt Championships model excellent performer October 1996 SeeBree Hayes Memorial Meet pit area Great Ron Cooks stunning Trivial Pursuit powered PA 40 pipe turnout Whittier Narrows Recreation Center southern CA 57 ounces should outstanding performer structure long preserve stress transfer Its possible especially move farther away forward center airplane Al Rabe used carve away Dremel tool much wing structure inside skin possible Bill Werwage significantly reduced tail structure unsheeted Wasren truss stab/elevators maintaining sufficient stiffness design considerations potential weight advantages wing consider spar cross-section typically maintained center tip strength requirements across span diminish approaching tip consider barbell effectweight extremities multiplies upsets aircraft stabilityyou want reduce structure weight go out center gravity CU built-up wing structures taper spars leading edge/trailing edge planking foam wings decreasing thickness foam toward tip viable dont like planform cutouts some people suggest have wing-mounted gear laminate clips rib reinforcements Lite Ply Use two bolts instead four substitute aluminum 4-40 cap screws alloy screws aluminum acceptable except engine mounting wingtips next years Ive used well-hollowed tips best could 9-10 ounce both tips adjustable tip weight box leadout guide going 1/ sheet balsa outlines can save 2-4 ounces tail surfaces Ive used t vertical stabilizers years Ive used built-up 1A6sheet-covered surfacesweightwise approaches toss-up However dont tempted use t cutting out inserting ribs fuselage last because Ive already mentioned skimp nose section section aft CU can make real gains because evesy gram saved multiplies moment doubled maintain same balance point instance save 1 gram 14 multiplier equals 14 grams plus 14 ahead CU balance equals 28 grams Thats significant can disregard convention go 3A2 sides instead ain ngidity strength suggest mold top bottom sections also 3A2 balsa takes time because have work up molds can amortized over several models Rigidity will maintained accurate formers resulting molding process curvature shells once locked down Remember Sand shells oaly male mold havent mentioned integrating composites structure design primary thing some research new products continuously developed used such tapered spar reinforcements thick center taper tip thickness planform Incorporating new composites requires structure redesign using described principles Already popular gaining increasing public exposure 2-ounce carbon veil covering material Ive used several airplanes lives up its claims Application methods using dope work well nitrate method uses thinned nitrate dope applied directiy through veil well-sanded raw balsa butyrate method use applies veil balsa has 2-3 coats dope either method veil sanded after several coats dope several coats added followed filler primary advantage veil forms very stable light hard surface shell Since hardness Garb Covers Glow Engines Dirt moisture cleaning solvents sneak through available opening cially carburetor muffler outlets close door such predators power simply seal outlets durable vinyl caps before cleaning engine storing winter package Garb Covers contains eight total caps four sizes S M L XL fit size glow engine Pick up pack today. help protect engines performance Cap engines outlets Carb Covers before cleaning storage dirt moisture door Don Anderson President Founder Great Planes Model Mt g location dealer nearest please call 1-800-682-8948 mention code number 0412H Distnbuted Exclusively Thrnugh GREAT PLANES MODEL OS R ROTORS COMPAN P0 505 9021 CHAMPAIGN 6 826 952 0 p g 9960 9 July1997 127 own glow engine cant afford NOT protect Great Planes inexpensive Carb Covers Fiberglass Parts available Lanier RO Inc Contact us fax 770-532-2163 information catalog send self-addressed stamped envelope P 0 Box 458 Oakwood GA 30566 II6 SBD 96 6 26 Tigvrhark P91 lIMs Ps 910i99911 DISTRIBUTING2059741307 EIV1EEI620 CR 324 Moulton AL 35650 FAX 205974-5542 depends dope ultimate hardness will develop several monthsespecially butyrate doesnt harden rapidly nitrate As mentioned veil makes superior covering solid surfaces will cover open bays wings woven cloth fragile apply sand until has some dope strengthen have used veil multiple layers nose section strengthen shape surface low spots Just dope patches sand Another area thought saw real gain laminating Laminating veil epoxy center no benefit same infusing composites structures realize gain strength potential structure reduction achieved pushing composite surface structure Im leaving out exotic applications Ive heard about such Paul Walkers carbon spar requires autoclave properly set epoxy Dan Winship has talked about carbon-shell wings lald up foam component autoclaved dissolving foam approaches mature projects require significant amount time conceive execute perhaps someday mull over factors necessarily brief survey should realize cant build light quickly take time things right New Items Dick Byron has photographed outstanding Precision Aerobatics fliers/airplanes action years has decided sell 20 x 30 enlargements recommend capture essence flight suitable framing hang enthusiasts shop den Also avallable pictures World Scale Competitions Dick has parricipated US team member Contact Dick Byron Big D AeroArt 1812 Castle Rd Arlington TX76014Tel 817461-7705 rful pair fast nd easy engine starts TORQMASTERTM 1 2V ELECTRIC STARTERS Rugged economicalwith enormous starting muscle 90 Deluxe engines up 90 cu 180 Heavy-Dub engines up 180 cu Available alligator clips 12V field battery use banana s power panels POWERCORE MKIITM 1 2V STARTER POWER PACK Compact cordless power source lets use electric starter anywherel MICRO DIGITAL MOTOR CONTROLLERS w SAFE NO GLITCH POVER ON SOFT LOV TORQUE \START UP HIGH RATE ALL SIZE LIGHT VEIGHT SELF ALIGNS TO YOUR TRANSMITTER NO ADJUSTMENT NECESSARY MICRO DEMON 100 2OAMP 1-14CELL 12 x085 xO39a 1 3g/46oz wires 4700Hz includes setup LED 995 *NtJIJ* MICRODEMON 102 *NSJI1* 2OAMP 6-8cELL BEC BRAKE 21g175oz wires 4700Hz 18 xOS5 xO 39 includes setup LED$5995 SPEED DEMON 200 35AMP 1-16CELL 16 xl OxO42 26g/92oz wires 2400Hz$8295 VIPER MODEL PRODUCTS 3475 Edison Way Suite Menlo Park CA 94025 1-S00-5g28473 VISA MASTERCARD ElevonMixer ELECTRONIC MIXER elevons v-tails flaps spoilers Ultra-simple setup aod installation Rugged microprocessorbasad design 100% electrooic tsr high reli ability Simply cosnecto betwees servos receiver Peatures semo reoersisg tour ditterect mining rules allow tailor miser seeds model Will overdrive semos nytioss selected simple dip switch Made USA designed work popular radio systemsAM PM PCM Very low power consumption Size fSnll9o Sd Weight ll250Z Less radio consectors Part Ns 0A $3095 lass sennecters $3885 eonplate AccessorySwitch ACCESSORY SWITCH gives ability add oriott function channel secriticing chan nels ability control semo Accesuoryllwitch designed switch 11030 volts up 30 amps man power dinsipotion 300 watts Modern microprocessor ryllwitch very simple setup installlust connect between semo receiver channel choose oft points selected simple dip switches 16 different valses LED indicator help setup Unit automatically turns off transmitter oft Made USA designed work popular radio systems Small size f0o09ll o Sd Weight 12 oz Low power consumphon Less radio connector Part No 0U $3495 Comptete nyntems cod otherprodsctn available planeo cars cod boats call write detallo GlowDriver ON-BOARD GLOW DRIVER makes stalling easier safer Keeps glow ping hot lust engine needs Microproc esour-based design simply connects between throttle semo receiver Reversi ble user-selectable nfl points Can easily drive two-cylinder twin-engine models Unit automatically turns oft trunuwitter oft 100% electronic Made USA und designed work popular radio systems Very small size 17 0 12 5 Sd Weight lldsz Low power consumption Comes web battery/plug wire less connectors cell avd plug clip Part No EA $3495 LiUI LS] Lel 4 1 SPCIALISTS IN COX AND AME ENGINES & CUSTOM PARTS COMPETITION ACCCESSORIES RACING WHEELS SOLID LINES CUSTOM NEEDLE VALVES OLD TIMER KITS & SUPPLIES COILS CONDENSERS PLUGS SILK QUALITY DOPE BRUSHES TRANSISTOR IGNITION SYSTEMS 112A TEXACO PLAYBOY SR KIT PH 619 761-0511 FAX 761-0937 VISA IMC WELCOME NO COD MINIMUM ORDER $1000 PLUS $300 SHIPPING INSURANCE $200 128 Model Aviation 21 Less currrntcrn Part No OA $4095 PO Eon 3129 COePSO Ceelsnr TX 79493-31 29 Send tsr 0R5ER5& SF0 012 014-0a43IOuS7PM DaLn CT FREE add $450 S&H par order CusToUER SEsorce FAX & AFTER Houes 512 814-5843 CataInd TX Faa add 775% ten
