Above left Ready fly Feather Merchant authors first Old-Timer converted electric power first Electric Leisure Playboy destroyed result battery failure Feather Merchant has exaggerated dihedral flies quite well CG 40 50 percent Above right After trying several motor/prop/battery combos geared Astro 05 pIctured proved best compromise runs seven 1 200-mAh cells swings Geist 13 x 6 foldIng prop Below left Theres plenty room servos on/off switches Velcrosecured receiver battery pack Below right Cooling air battery pack exits through vent slots built fuselage bottom WHEN ELECTRIC power first appeared Electric Old-Timer seemed ideal project because pressures career wasnt until 1985 found time build first Electric model Leisure Playboy geared 05 motor specifications airplane follow Leisure Playboy Span 67 weight 44 oz Area 576 sq Power Leisure LT5O 25/1 gear Battery six 1 200-mAh cells Best propeller 11 x 5 Modelers accustomed building sheet balsa foam will no doubt find challenging construction project however building Playboy like trip down memory lane mod els years ago fond recollections fi nally convinced start building OldTimers electric power reasonable care construction Playboy quite reliable performer think secret models success its very light airframe makes difficult Dr Cohn McKinley build overweight know Play boy weighs about 60 oz its still flying well Though model destroyed because battery failure other models de scribed article still flying writing Lehmberg Feather Merchant Span 72 weight 64 oz Area 660 sq Power Keller 25/12 Battery 12 800-mAli cells Best propeller 11 x 6 10 x 7 first attempt full Electric conver sion Lehmberg Feather Mer chant As project progressed became apparent using geared 05 motor Playboy would result marginal performance able purchase Kel ler 25/12 Toledo found great increase power opened up whole new world performancewith minimal weight increase Takeoff runs rough field just few feet three climbs 800 ft charge routine local SAM Society Antique Mod elers group allowed fly its contests giving extra 60-sec motor run subtracted end flight compensate extra weight Electric have able place both Limited Motor Run Antique events model Feather Merchant has exagger ated amount washout flies beautifully CG center-of-gravity 50 60 percent range Since Old-Timer plans dont show CO location new build ers often dont realize old designs lifting stabs intended fly CG positions far aft Often de signs seem fly poorly balanced 30 percent range us accus tomed Old-Timers have landing gear positioned far forward wing leading edge bad ground handling great saving props old days sufficient power well-built OldTimer gets air quickly landElectric OldTimers medley Old-Timer designs can easily converted elec tric power still have performance characteristics close equalling original glow-powered counterparts 78 Model Aviation model result its too heavy Based experience gained subsequent proj ects think could build almost pound lighter out compro mise strength model flies well moder ately aerobatic flat-bot stallation radio power system very difficult During construction forgot needed aft CG redo power ra dio installation its final form entire power system can serviced removing cowl cockpit natural cooling air exit well perfect place ser vos performance model made construction problems worthwhile climb rate probably good glow-powered Old-Timers very windy conditions think New Ruler has betTop picture Scientific Mercury conversion No 2 turned out too heavy will still fly moderate aerobatics pound less weight undercambered wings would make sing large fuselage served well test bed various systems Above left interior shot shows entire control setup including Jomar SC4 speed controller heat sink Above right Geist 30/10 motor aluminum mount runs 14 800-mAh cells best prop combo Geist folding 13 x 6 shown Below cooling air intake exhaust ing gear position doesnt seem great problem low-powered model might wise move gear back until wheels below leading edge wing will destroy look au thenticity Feather Merchant has now re powered geared Astro 05 using seven 1200-mAli cells 13 x 6 Geist fold ing propeller performance much im proved probably because big slow-moving prop better duplicates orig inal power setup smaller fastturning Keller power package wasted large airframe lot drag Scientific Mercury Span 72 weight 84 oz Area 720 sq Power Geist 30/10 Battery 14 800-mAh cells Best propeller Geist 13 x 6 folding Mercury chosen because think its realistic prettiest Old-Timer designs ever published Too much spruce ply used building tomed wing easy build cover lacks glide undercambered airfoil big roomy fuselage makes ideal test bed variety battery packs speed controls New Ruler Span 74 weight 96 oz Area 835 sq Power Keller 50/24 Battery 21 800-mAh cells Best propellers Geist 13 x 6 wood 12 x 6 consider New Ruler beautiful Old-Timer designs first project started using spruce/balsa laminates gain strength great gain weight project nearly disaster because started two sets plans speed up building process plans different sources varied up inch some critical measurements great deal models weight comes stringers formers used pro duce its streamlined shape pylon de sign plus streamlining made inter performance some lighter weight ships Miss America 4/7-scale Span 48 weight 32 oz Area 310 sq Power Astro 035 cobalt Battery five 800-mAh cells Best Propeller 7 x 4 wood model loosely based early 70s Micro Models kit kit de signed like tank present version lightened much possible Actually ribs tip outlines used original kit Youll find old designs have reasonable wing tail structures fuselages designed withstand stresses Free Flight test ing flying reasonable care de sign construction can often build Old-Timer electric power may come close design weight orig inal model will take off almost instantly slight headwind Ive logged several flights excess 20 minutes ther September 1990 79 Span 84 weight 100 oz Area 1126 sq Power Astro 60 cobalt Battery 24 800-mAh cells 28 400-mAh project began attempt con struct Electric model performance equal glow-powered ship Exten sive use made spruce balsa car bon fiber laminates using aluminum Above left Miss America based old Micro Models kit considerably lightened model takes off almost instantly ther mals beautifully logging flights over 20 minutes Above right Astro 035 cobalt motor secured rubberbands receiver battery oack fit below servos forward unit RJM on/off switch orog brake Below battery cooling air intake exhaust 80 Model Aviation Above left Sleek beautiful New Ruler quite striking built sprucelbaisa laminates save weight gain strength Perform ance outstanding climb rate equal Old-Timers Above right Side hatch removed showing access battery pack servos Below left Close-up Keller 50124 motor Installation standard automotive hose clamp holds motor place microawitch mounted bulkhead just above landing gear wire Below right control surface servos mounted cockpit less noisy what seen some contests Electrics reliable mals quite well weight 32 OZ IBest propeller 14 x 6 THP 14 x 6-10 entered Miss America /2A Texaco event able place fourthPowerhouseprogressive pitch Some consideration should given creating Texaco events electric power motor run small Astro co balt motors probably close Cox 049 electric power lot L Above len Ineyre getting iggeri owernouse its 84-in span powered Astro 60 cobalt motor designed equal glowpowered performance Extensive use spruce balsa carbon laminates kept strong light Above right An aluminum right angle tached balsa nose block serves motor mount Below left takes 28 450-mAh cells 24 900-mAh cells shown drive Astro 60 Below right interior layout showing microservos onloff switch wiring motor its aluminum mount angle ajig can lay up material wing spars fuselage longerons simul taneously Besides plywood dihedral braces landing gear mounts other plywood model /64 ply used line cabin area A6 ply battery mount surface outlines A6 balsa lami nates motor mount simple alumi num right angle thats attached balsa nose block wood screws set dowel plugs battery pack secured bot tom fuselage no special duct ing necessary cooling performance model compares favorably glow-powered versions has excellent glide characteristics can improved upon using smaller battery pack battery pack mounted floor cabin its exposed cooling easy changing yet visible model viewed directly below Because large size fuselage control linkages can internal no bends control reds allows use smallest servos available Ive no problems control system Power house model purchased another builder because wanted see air plane size would fly electric power motor attached standard en gine mounts couple Nyrod straps batteries wrapped foam rubber simply dropped fuselage Continued page 82 Left Goiberg Vaikyre its 1 20-in-span wing purchased author another builder order experiment electric power systems model size Astro 60 cobalt motor running 24 800-mAh cells swinging 14 x 6 prop plane will take off 10 feet has climb rate about 500 ft per mm flies fast trot motor standard mount battery simply wrapped foam dropped fuselage Right Valkyre silently soars stately pace over Michigan countryside September 1990 81 Battery 24 800-mAh cells Best propeller 14 x 6 SHOOT YOUR ENEMY DOWN LANIER RCs p-SI Sport CAT NO 74112 THE ORIGINATORS OF ALMOST-READY-TO-FLY AIRCRAFT MADE OF PLASTIC AND FOAM Fuselage Length 45 Rec Engine Size 45-60 4 Stroke 80-90 Flying Weight 6 lbs Wing Span 63 Area 630 sq Radio Channels 4 Available favorite Hobby Dealer Replacement parts available Dealer distributor Inquiries invited Write today free color catalog PO Box 458 Oakwood Georgia 30566 Made USA 404-532-6401 MLL PARTS PRE-CUT & PRE-PAINTED BUILD & FLY IN TWO HOURS PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Vol I/Cat $1500 REVISED & EXPANDED Contains over 2000 airplanes postage stamp size 6 ft wing span RCl Gliders rubber powered Die-cut you-cut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDINGI Vol I/Cat CORSAIR oaper airplane above $1800 plus $250 postage X Easily attached 25 108 size engine silencers FREEDOM 90 Muffler gives AMA recommended 90 dBA 9 silencing noise noise cornplaints Ensure yourX freedom fly Unchallenged through 90sX FREEDOM 90 Tested qualified US published engine reviewer Silences 50-98% engine noise WITHOUT POWER LOSSI Uc US SNUF-LER Patent #4858722 X CALL 1-800-NOW GO RC 1-800-669-4672 VISA AND MASTERCARD 309 Laurelwood #1accepted Add $250 shipping Please allow Santa Clara CA 950542 weeks delivery time jxxxxxxxxxxx model takes off about 10 ft less flies what might called fast trot still climbs about 500 ft per mm Its likely threat anything else field Valkyre really does tract crowd Building hints As true Electric project light structure essential wing tail de signs Old-Timers adequate addition some shear webs streng wings Some weight can saved laminating tip outlines several lay ers 1/16 balsa soaked water shaped over cardboard form Wing spars can either balsa carbon fiber inlays lam inates balsa carbon fiber spruce technique used uncov ered wing Powerhouse weighed 10 ounces opinion 34-oz Micafilm looks lot like doped silkspan best covering material models Fuselages can lightened great deal loss strength using smaller sizes wood Lining cabin ar eas produces very strong struc ture much increase weight Mo tor mounts can eliminated either strap ping electric motor nose block rubberbands making metal mount described Powerhouse choose mount battery inter nally must provide cooling air en try exit Mounting battery cav ity bottom fuselage de scribed Powerhouse provides maxi mum cooling ease service bother weight building cooling ducts First-time models should cabin de signs boxy fuselages since expe rience pylon designs streamlined fuse lages make mounting batteries radios very difficult Battery mounting should al low easy shifting batteries until find best CG location will often 50 60 percent range can build electric-powered OldTimer will weigh little original design through careful attention selection wood covering materials Depending selection power package flight patterns close origi nal near-vertical performance seen SAM contests can achieved built considerably above specified weight OldTimer designs have beautiful floating glides Its easy understand went OOS out-of-sight 15- 20-sec engine runs years ago have found Electric Old-Timers fun build fly Flight characteristics cover wide range depending power package used hope modelers will consider developing Electric /2A Texaco event using new 02 035 mo tors prefer events allow flight per Continued page 184 82 Model Aviation Paper Flying Scale Model Airplane $io ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE RONS MODEL Radio Controiled BUILDINGAirplanes Other Aircraft Boats 213 451-0414 ii Build Ry model should climb right turn glide left Glide controlled stabilizer tilt thickness aft incidence block Climb adjusted after satisfac tory glide trim has established Adjust climb small changes thrust line Thrust adjusted gently filing end motor tube change angle nose block rests very small increments Dont fly full power until youre completely satisfied models trim Make sure model climbs right turn avoid tendency loop hang prop power stall youre ready fly full power launch model about 450 angle tends go its pointed have flown few Conscientious Objectors just didnt want turn left glide ri diculous amount tilt stabilizer simply let turn right glide well climb Still unless really know what youre doing left glide right climb safe way go Dethermalizer accompanying photo dethermalizer shows its layout quite clearly guide tube under SHOC sta bilizer mount has multiple functions con ducts DT line keeps stabilizer rub bers touching line serves DT limit stop piece monofilament line can used DT line loop end fitted over peg top sta bilizer rubber must installed over loop stay place rubber loops over peg extends across leading edge stabilizer goes down around fuselage back up peg bit fuel tubing serves nicely DT line limit can tied line simple overhand knot adjusted strike line guide tube under SHOC mount tubing should adjusted allow about 450 stabilizer DT angle Tied other end DT line paper clip wire hook fuse rubberband extends hook across fuse around motor peg Use sharpened piece aluminum tubing drill holes fuselage makes cleaner hole does drill Use A-in tube fuse holder extending through both sides fuselage way can poke fuse material through piece wire can also pull out bit fuse case delay between lighting launching Glue tube firmly place heat sink can made alumi num can must selected care Ive used Coors Light cans cant say whether another brand would work well will gladly try answer questions might have about Conscientious Ob jector Send SASE 1902 Peter Pan St Norman OK 73072 responding advertisers mention read about Model Aviation Convert/McKinley Continued page 82 charge rather three some plan ning use small battery packs can aim think 20- 30-sec motor runs climb rates equal glow- ignition-powered models little no weight penalty Rally/Homer Continued page 88 forget did didnt fly AMA Rally Scobie Field Nor will other Houston modelers Bomber Field Club planning major event October Sev eral B-17s air simultaneously would something behold AMA Frequency Committee member George Steiner traveled Sacra mento CA teamed Bob Spivey Aus tin TX handle transmitter impound chores Charlie Marilyn Stevens Vance Dottie Wyman coordinated host local volunteers assist planning running event course rally would have possible efforts AMA HAMCI staff volunteers AMA Presi dent Don Lowe District VIH Vice Presi dent Gene Hempel AMA Executive Di rector Vince Mankowski hand Continued page 188 184 Model Aviation Caii Write 435 San Vicente Bivd J Santa Monica CA 90402 turn yoor printer lot oil plotter with.. FOILED AGAIN! C PLOT AIRFOILS IN ANY CIIORD u 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR 5HEETED WINGS ENTER DATA EASILY VIA INTELUGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED U5ER MANUAL $45oo a cram prom slain ~2Z4i IiwflaihOO COopuV ira dot INI Clv conwaS potfli tWo w* irding ipioty 550 o 30 dOic Sm ram urocoy ordi CYGNET Software714 4966961 24843 Del Prado #141B Dana Point CA 92629 CAPACITIVE-DISCHARGE IGNITION SEA5 AMAN No moving parts No eng ne mod oat ons Basic unit $ 9995 Opposedcylinder twin $ 11995 ELECTRONIC CIRCUITRY REPLACES ANY MECHANICAL ADVANCE MAKES MAGNETO CONVERSIONS SNAPII
Edition: Model Aviation - 1990/09
Page Numbers: 78, 79, 80, 81, 82, 184
Above left Ready fly Feather Merchant authors first Old-Timer converted electric power first Electric Leisure Playboy destroyed result battery failure Feather Merchant has exaggerated dihedral flies quite well CG 40 50 percent Above right After trying several motor/prop/battery combos geared Astro 05 pIctured proved best compromise runs seven 1 200-mAh cells swings Geist 13 x 6 foldIng prop Below left Theres plenty room servos on/off switches Velcrosecured receiver battery pack Below right Cooling air battery pack exits through vent slots built fuselage bottom WHEN ELECTRIC power first appeared Electric Old-Timer seemed ideal project because pressures career wasnt until 1985 found time build first Electric model Leisure Playboy geared 05 motor specifications airplane follow Leisure Playboy Span 67 weight 44 oz Area 576 sq Power Leisure LT5O 25/1 gear Battery six 1 200-mAh cells Best propeller 11 x 5 Modelers accustomed building sheet balsa foam will no doubt find challenging construction project however building Playboy like trip down memory lane mod els years ago fond recollections fi nally convinced start building OldTimers electric power reasonable care construction Playboy quite reliable performer think secret models success its very light airframe makes difficult Dr Cohn McKinley build overweight know Play boy weighs about 60 oz its still flying well Though model destroyed because battery failure other models de scribed article still flying writing Lehmberg Feather Merchant Span 72 weight 64 oz Area 660 sq Power Keller 25/12 Battery 12 800-mAli cells Best propeller 11 x 6 10 x 7 first attempt full Electric conver sion Lehmberg Feather Mer chant As project progressed became apparent using geared 05 motor Playboy would result marginal performance able purchase Kel ler 25/12 Toledo found great increase power opened up whole new world performancewith minimal weight increase Takeoff runs rough field just few feet three climbs 800 ft charge routine local SAM Society Antique Mod elers group allowed fly its contests giving extra 60-sec motor run subtracted end flight compensate extra weight Electric have able place both Limited Motor Run Antique events model Feather Merchant has exagger ated amount washout flies beautifully CG center-of-gravity 50 60 percent range Since Old-Timer plans dont show CO location new build ers often dont realize old designs lifting stabs intended fly CG positions far aft Often de signs seem fly poorly balanced 30 percent range us accus tomed Old-Timers have landing gear positioned far forward wing leading edge bad ground handling great saving props old days sufficient power well-built OldTimer gets air quickly landElectric OldTimers medley Old-Timer designs can easily converted elec tric power still have performance characteristics close equalling original glow-powered counterparts 78 Model Aviation model result its too heavy Based experience gained subsequent proj ects think could build almost pound lighter out compro mise strength model flies well moder ately aerobatic flat-bot stallation radio power system very difficult During construction forgot needed aft CG redo power ra dio installation its final form entire power system can serviced removing cowl cockpit natural cooling air exit well perfect place ser vos performance model made construction problems worthwhile climb rate probably good glow-powered Old-Timers very windy conditions think New Ruler has betTop picture Scientific Mercury conversion No 2 turned out too heavy will still fly moderate aerobatics pound less weight undercambered wings would make sing large fuselage served well test bed various systems Above left interior shot shows entire control setup including Jomar SC4 speed controller heat sink Above right Geist 30/10 motor aluminum mount runs 14 800-mAh cells best prop combo Geist folding 13 x 6 shown Below cooling air intake exhaust ing gear position doesnt seem great problem low-powered model might wise move gear back until wheels below leading edge wing will destroy look au thenticity Feather Merchant has now re powered geared Astro 05 using seven 1200-mAli cells 13 x 6 Geist fold ing propeller performance much im proved probably because big slow-moving prop better duplicates orig inal power setup smaller fastturning Keller power package wasted large airframe lot drag Scientific Mercury Span 72 weight 84 oz Area 720 sq Power Geist 30/10 Battery 14 800-mAh cells Best propeller Geist 13 x 6 folding Mercury chosen because think its realistic prettiest Old-Timer designs ever published Too much spruce ply used building tomed wing easy build cover lacks glide undercambered airfoil big roomy fuselage makes ideal test bed variety battery packs speed controls New Ruler Span 74 weight 96 oz Area 835 sq Power Keller 50/24 Battery 21 800-mAh cells Best propellers Geist 13 x 6 wood 12 x 6 consider New Ruler beautiful Old-Timer designs first project started using spruce/balsa laminates gain strength great gain weight project nearly disaster because started two sets plans speed up building process plans different sources varied up inch some critical measurements great deal models weight comes stringers formers used pro duce its streamlined shape pylon de sign plus streamlining made inter performance some lighter weight ships Miss America 4/7-scale Span 48 weight 32 oz Area 310 sq Power Astro 035 cobalt Battery five 800-mAh cells Best Propeller 7 x 4 wood model loosely based early 70s Micro Models kit kit de signed like tank present version lightened much possible Actually ribs tip outlines used original kit Youll find old designs have reasonable wing tail structures fuselages designed withstand stresses Free Flight test ing flying reasonable care de sign construction can often build Old-Timer electric power may come close design weight orig inal model will take off almost instantly slight headwind Ive logged several flights excess 20 minutes ther September 1990 79 Span 84 weight 100 oz Area 1126 sq Power Astro 60 cobalt Battery 24 800-mAh cells 28 400-mAh project began attempt con struct Electric model performance equal glow-powered ship Exten sive use made spruce balsa car bon fiber laminates using aluminum Above left Miss America based old Micro Models kit considerably lightened model takes off almost instantly ther mals beautifully logging flights over 20 minutes Above right Astro 035 cobalt motor secured rubberbands receiver battery oack fit below servos forward unit RJM on/off switch orog brake Below battery cooling air intake exhaust 80 Model Aviation Above left Sleek beautiful New Ruler quite striking built sprucelbaisa laminates save weight gain strength Perform ance outstanding climb rate equal Old-Timers Above right Side hatch removed showing access battery pack servos Below left Close-up Keller 50124 motor Installation standard automotive hose clamp holds motor place microawitch mounted bulkhead just above landing gear wire Below right control surface servos mounted cockpit less noisy what seen some contests Electrics reliable mals quite well weight 32 OZ IBest propeller 14 x 6 THP 14 x 6-10 entered Miss America /2A Texaco event able place fourthPowerhouseprogressive pitch Some consideration should given creating Texaco events electric power motor run small Astro co balt motors probably close Cox 049 electric power lot L Above len Ineyre getting iggeri owernouse its 84-in span powered Astro 60 cobalt motor designed equal glowpowered performance Extensive use spruce balsa carbon laminates kept strong light Above right An aluminum right angle tached balsa nose block serves motor mount Below left takes 28 450-mAh cells 24 900-mAh cells shown drive Astro 60 Below right interior layout showing microservos onloff switch wiring motor its aluminum mount angle ajig can lay up material wing spars fuselage longerons simul taneously Besides plywood dihedral braces landing gear mounts other plywood model /64 ply used line cabin area A6 ply battery mount surface outlines A6 balsa lami nates motor mount simple alumi num right angle thats attached balsa nose block wood screws set dowel plugs battery pack secured bot tom fuselage no special duct ing necessary cooling performance model compares favorably glow-powered versions has excellent glide characteristics can improved upon using smaller battery pack battery pack mounted floor cabin its exposed cooling easy changing yet visible model viewed directly below Because large size fuselage control linkages can internal no bends control reds allows use smallest servos available Ive no problems control system Power house model purchased another builder because wanted see air plane size would fly electric power motor attached standard en gine mounts couple Nyrod straps batteries wrapped foam rubber simply dropped fuselage Continued page 82 Left Goiberg Vaikyre its 1 20-in-span wing purchased author another builder order experiment electric power systems model size Astro 60 cobalt motor running 24 800-mAh cells swinging 14 x 6 prop plane will take off 10 feet has climb rate about 500 ft per mm flies fast trot motor standard mount battery simply wrapped foam dropped fuselage Right Valkyre silently soars stately pace over Michigan countryside September 1990 81 Battery 24 800-mAh cells Best propeller 14 x 6 SHOOT YOUR ENEMY DOWN LANIER RCs p-SI Sport CAT NO 74112 THE ORIGINATORS OF ALMOST-READY-TO-FLY AIRCRAFT MADE OF PLASTIC AND FOAM Fuselage Length 45 Rec Engine Size 45-60 4 Stroke 80-90 Flying Weight 6 lbs Wing Span 63 Area 630 sq Radio Channels 4 Available favorite Hobby Dealer Replacement parts available Dealer distributor Inquiries invited Write today free color catalog PO Box 458 Oakwood Georgia 30566 Made USA 404-532-6401 MLL PARTS PRE-CUT & PRE-PAINTED BUILD & FLY IN TWO HOURS PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Vol I/Cat $1500 REVISED & EXPANDED Contains over 2000 airplanes postage stamp size 6 ft wing span RCl Gliders rubber powered Die-cut you-cut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDINGI Vol I/Cat CORSAIR oaper airplane above $1800 plus $250 postage X Easily attached 25 108 size engine silencers FREEDOM 90 Muffler gives AMA recommended 90 dBA 9 silencing noise noise cornplaints Ensure yourX freedom fly Unchallenged through 90sX FREEDOM 90 Tested qualified US published engine reviewer Silences 50-98% engine noise WITHOUT POWER LOSSI Uc US SNUF-LER Patent #4858722 X CALL 1-800-NOW GO RC 1-800-669-4672 VISA AND MASTERCARD 309 Laurelwood #1accepted Add $250 shipping Please allow Santa Clara CA 950542 weeks delivery time jxxxxxxxxxxx model takes off about 10 ft less flies what might called fast trot still climbs about 500 ft per mm Its likely threat anything else field Valkyre really does tract crowd Building hints As true Electric project light structure essential wing tail de signs Old-Timers adequate addition some shear webs streng wings Some weight can saved laminating tip outlines several lay ers 1/16 balsa soaked water shaped over cardboard form Wing spars can either balsa carbon fiber inlays lam inates balsa carbon fiber spruce technique used uncov ered wing Powerhouse weighed 10 ounces opinion 34-oz Micafilm looks lot like doped silkspan best covering material models Fuselages can lightened great deal loss strength using smaller sizes wood Lining cabin ar eas produces very strong struc ture much increase weight Mo tor mounts can eliminated either strap ping electric motor nose block rubberbands making metal mount described Powerhouse choose mount battery inter nally must provide cooling air en try exit Mounting battery cav ity bottom fuselage de scribed Powerhouse provides maxi mum cooling ease service bother weight building cooling ducts First-time models should cabin de signs boxy fuselages since expe rience pylon designs streamlined fuse lages make mounting batteries radios very difficult Battery mounting should al low easy shifting batteries until find best CG location will often 50 60 percent range can build electric-powered OldTimer will weigh little original design through careful attention selection wood covering materials Depending selection power package flight patterns close origi nal near-vertical performance seen SAM contests can achieved built considerably above specified weight OldTimer designs have beautiful floating glides Its easy understand went OOS out-of-sight 15- 20-sec engine runs years ago have found Electric Old-Timers fun build fly Flight characteristics cover wide range depending power package used hope modelers will consider developing Electric /2A Texaco event using new 02 035 mo tors prefer events allow flight per Continued page 184 82 Model Aviation Paper Flying Scale Model Airplane $io ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE RONS MODEL Radio Controiled BUILDINGAirplanes Other Aircraft Boats 213 451-0414 ii Build Ry model should climb right turn glide left Glide controlled stabilizer tilt thickness aft incidence block Climb adjusted after satisfac tory glide trim has established Adjust climb small changes thrust line Thrust adjusted gently filing end motor tube change angle nose block rests very small increments Dont fly full power until youre completely satisfied models trim Make sure model climbs right turn avoid tendency loop hang prop power stall youre ready fly full power launch model about 450 angle tends go its pointed have flown few Conscientious Objectors just didnt want turn left glide ri diculous amount tilt stabilizer simply let turn right glide well climb Still unless really know what youre doing left glide right climb safe way go Dethermalizer accompanying photo dethermalizer shows its layout quite clearly guide tube under SHOC sta bilizer mount has multiple functions con ducts DT line keeps stabilizer rub bers touching line serves DT limit stop piece monofilament line can used DT line loop end fitted over peg top sta bilizer rubber must installed over loop stay place rubber loops over peg extends across leading edge stabilizer goes down around fuselage back up peg bit fuel tubing serves nicely DT line limit can tied line simple overhand knot adjusted strike line guide tube under SHOC mount tubing should adjusted allow about 450 stabilizer DT angle Tied other end DT line paper clip wire hook fuse rubberband extends hook across fuse around motor peg Use sharpened piece aluminum tubing drill holes fuselage makes cleaner hole does drill Use A-in tube fuse holder extending through both sides fuselage way can poke fuse material through piece wire can also pull out bit fuse case delay between lighting launching Glue tube firmly place heat sink can made alumi num can must selected care Ive used Coors Light cans cant say whether another brand would work well will gladly try answer questions might have about Conscientious Ob jector Send SASE 1902 Peter Pan St Norman OK 73072 responding advertisers mention read about Model Aviation Convert/McKinley Continued page 82 charge rather three some plan ning use small battery packs can aim think 20- 30-sec motor runs climb rates equal glow- ignition-powered models little no weight penalty Rally/Homer Continued page 88 forget did didnt fly AMA Rally Scobie Field Nor will other Houston modelers Bomber Field Club planning major event October Sev eral B-17s air simultaneously would something behold AMA Frequency Committee member George Steiner traveled Sacra mento CA teamed Bob Spivey Aus tin TX handle transmitter impound chores Charlie Marilyn Stevens Vance Dottie Wyman coordinated host local volunteers assist planning running event course rally would have possible efforts AMA HAMCI staff volunteers AMA Presi dent Don Lowe District VIH Vice Presi dent Gene Hempel AMA Executive Di rector Vince Mankowski hand Continued page 188 184 Model Aviation Caii Write 435 San Vicente Bivd J Santa Monica CA 90402 turn yoor printer lot oil plotter with.. FOILED AGAIN! C PLOT AIRFOILS IN ANY CIIORD u 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR 5HEETED WINGS ENTER DATA EASILY VIA INTELUGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED U5ER MANUAL $45oo a cram prom slain ~2Z4i IiwflaihOO COopuV ira dot INI Clv conwaS potfli tWo w* irding ipioty 550 o 30 dOic Sm ram urocoy ordi CYGNET Software714 4966961 24843 Del Prado #141B Dana Point CA 92629 CAPACITIVE-DISCHARGE IGNITION SEA5 AMAN No moving parts No eng ne mod oat ons Basic unit $ 9995 Opposedcylinder twin $ 11995 ELECTRONIC CIRCUITRY REPLACES ANY MECHANICAL ADVANCE MAKES MAGNETO CONVERSIONS SNAPII
Edition: Model Aviation - 1990/09
Page Numbers: 78, 79, 80, 81, 82, 184
Above left Ready fly Feather Merchant authors first Old-Timer converted electric power first Electric Leisure Playboy destroyed result battery failure Feather Merchant has exaggerated dihedral flies quite well CG 40 50 percent Above right After trying several motor/prop/battery combos geared Astro 05 pIctured proved best compromise runs seven 1 200-mAh cells swings Geist 13 x 6 foldIng prop Below left Theres plenty room servos on/off switches Velcrosecured receiver battery pack Below right Cooling air battery pack exits through vent slots built fuselage bottom WHEN ELECTRIC power first appeared Electric Old-Timer seemed ideal project because pressures career wasnt until 1985 found time build first Electric model Leisure Playboy geared 05 motor specifications airplane follow Leisure Playboy Span 67 weight 44 oz Area 576 sq Power Leisure LT5O 25/1 gear Battery six 1 200-mAh cells Best propeller 11 x 5 Modelers accustomed building sheet balsa foam will no doubt find challenging construction project however building Playboy like trip down memory lane mod els years ago fond recollections fi nally convinced start building OldTimers electric power reasonable care construction Playboy quite reliable performer think secret models success its very light airframe makes difficult Dr Cohn McKinley build overweight know Play boy weighs about 60 oz its still flying well Though model destroyed because battery failure other models de scribed article still flying writing Lehmberg Feather Merchant Span 72 weight 64 oz Area 660 sq Power Keller 25/12 Battery 12 800-mAli cells Best propeller 11 x 6 10 x 7 first attempt full Electric conver sion Lehmberg Feather Mer chant As project progressed became apparent using geared 05 motor Playboy would result marginal performance able purchase Kel ler 25/12 Toledo found great increase power opened up whole new world performancewith minimal weight increase Takeoff runs rough field just few feet three climbs 800 ft charge routine local SAM Society Antique Mod elers group allowed fly its contests giving extra 60-sec motor run subtracted end flight compensate extra weight Electric have able place both Limited Motor Run Antique events model Feather Merchant has exagger ated amount washout flies beautifully CG center-of-gravity 50 60 percent range Since Old-Timer plans dont show CO location new build ers often dont realize old designs lifting stabs intended fly CG positions far aft Often de signs seem fly poorly balanced 30 percent range us accus tomed Old-Timers have landing gear positioned far forward wing leading edge bad ground handling great saving props old days sufficient power well-built OldTimer gets air quickly landElectric OldTimers medley Old-Timer designs can easily converted elec tric power still have performance characteristics close equalling original glow-powered counterparts 78 Model Aviation model result its too heavy Based experience gained subsequent proj ects think could build almost pound lighter out compro mise strength model flies well moder ately aerobatic flat-bot stallation radio power system very difficult During construction forgot needed aft CG redo power ra dio installation its final form entire power system can serviced removing cowl cockpit natural cooling air exit well perfect place ser vos performance model made construction problems worthwhile climb rate probably good glow-powered Old-Timers very windy conditions think New Ruler has betTop picture Scientific Mercury conversion No 2 turned out too heavy will still fly moderate aerobatics pound less weight undercambered wings would make sing large fuselage served well test bed various systems Above left interior shot shows entire control setup including Jomar SC4 speed controller heat sink Above right Geist 30/10 motor aluminum mount runs 14 800-mAh cells best prop combo Geist folding 13 x 6 shown Below cooling air intake exhaust ing gear position doesnt seem great problem low-powered model might wise move gear back until wheels below leading edge wing will destroy look au thenticity Feather Merchant has now re powered geared Astro 05 using seven 1200-mAli cells 13 x 6 Geist fold ing propeller performance much im proved probably because big slow-moving prop better duplicates orig inal power setup smaller fastturning Keller power package wasted large airframe lot drag Scientific Mercury Span 72 weight 84 oz Area 720 sq Power Geist 30/10 Battery 14 800-mAh cells Best propeller Geist 13 x 6 folding Mercury chosen because think its realistic prettiest Old-Timer designs ever published Too much spruce ply used building tomed wing easy build cover lacks glide undercambered airfoil big roomy fuselage makes ideal test bed variety battery packs speed controls New Ruler Span 74 weight 96 oz Area 835 sq Power Keller 50/24 Battery 21 800-mAh cells Best propellers Geist 13 x 6 wood 12 x 6 consider New Ruler beautiful Old-Timer designs first project started using spruce/balsa laminates gain strength great gain weight project nearly disaster because started two sets plans speed up building process plans different sources varied up inch some critical measurements great deal models weight comes stringers formers used pro duce its streamlined shape pylon de sign plus streamlining made inter performance some lighter weight ships Miss America 4/7-scale Span 48 weight 32 oz Area 310 sq Power Astro 035 cobalt Battery five 800-mAh cells Best Propeller 7 x 4 wood model loosely based early 70s Micro Models kit kit de signed like tank present version lightened much possible Actually ribs tip outlines used original kit Youll find old designs have reasonable wing tail structures fuselages designed withstand stresses Free Flight test ing flying reasonable care de sign construction can often build Old-Timer electric power may come close design weight orig inal model will take off almost instantly slight headwind Ive logged several flights excess 20 minutes ther September 1990 79 Span 84 weight 100 oz Area 1126 sq Power Astro 60 cobalt Battery 24 800-mAh cells 28 400-mAh project began attempt con struct Electric model performance equal glow-powered ship Exten sive use made spruce balsa car bon fiber laminates using aluminum Above left Miss America based old Micro Models kit considerably lightened model takes off almost instantly ther mals beautifully logging flights over 20 minutes Above right Astro 035 cobalt motor secured rubberbands receiver battery oack fit below servos forward unit RJM on/off switch orog brake Below battery cooling air intake exhaust 80 Model Aviation Above left Sleek beautiful New Ruler quite striking built sprucelbaisa laminates save weight gain strength Perform ance outstanding climb rate equal Old-Timers Above right Side hatch removed showing access battery pack servos Below left Close-up Keller 50124 motor Installation standard automotive hose clamp holds motor place microawitch mounted bulkhead just above landing gear wire Below right control surface servos mounted cockpit less noisy what seen some contests Electrics reliable mals quite well weight 32 OZ IBest propeller 14 x 6 THP 14 x 6-10 entered Miss America /2A Texaco event able place fourthPowerhouseprogressive pitch Some consideration should given creating Texaco events electric power motor run small Astro co balt motors probably close Cox 049 electric power lot L Above len Ineyre getting iggeri owernouse its 84-in span powered Astro 60 cobalt motor designed equal glowpowered performance Extensive use spruce balsa carbon laminates kept strong light Above right An aluminum right angle tached balsa nose block serves motor mount Below left takes 28 450-mAh cells 24 900-mAh cells shown drive Astro 60 Below right interior layout showing microservos onloff switch wiring motor its aluminum mount angle ajig can lay up material wing spars fuselage longerons simul taneously Besides plywood dihedral braces landing gear mounts other plywood model /64 ply used line cabin area A6 ply battery mount surface outlines A6 balsa lami nates motor mount simple alumi num right angle thats attached balsa nose block wood screws set dowel plugs battery pack secured bot tom fuselage no special duct ing necessary cooling performance model compares favorably glow-powered versions has excellent glide characteristics can improved upon using smaller battery pack battery pack mounted floor cabin its exposed cooling easy changing yet visible model viewed directly below Because large size fuselage control linkages can internal no bends control reds allows use smallest servos available Ive no problems control system Power house model purchased another builder because wanted see air plane size would fly electric power motor attached standard en gine mounts couple Nyrod straps batteries wrapped foam rubber simply dropped fuselage Continued page 82 Left Goiberg Vaikyre its 1 20-in-span wing purchased author another builder order experiment electric power systems model size Astro 60 cobalt motor running 24 800-mAh cells swinging 14 x 6 prop plane will take off 10 feet has climb rate about 500 ft per mm flies fast trot motor standard mount battery simply wrapped foam dropped fuselage Right Valkyre silently soars stately pace over Michigan countryside September 1990 81 Battery 24 800-mAh cells Best propeller 14 x 6 SHOOT YOUR ENEMY DOWN LANIER RCs p-SI Sport CAT NO 74112 THE ORIGINATORS OF ALMOST-READY-TO-FLY AIRCRAFT MADE OF PLASTIC AND FOAM Fuselage Length 45 Rec Engine Size 45-60 4 Stroke 80-90 Flying Weight 6 lbs Wing Span 63 Area 630 sq Radio Channels 4 Available favorite Hobby Dealer Replacement parts available Dealer distributor Inquiries invited Write today free color catalog PO Box 458 Oakwood Georgia 30566 Made USA 404-532-6401 MLL PARTS PRE-CUT & PRE-PAINTED BUILD & FLY IN TWO HOURS PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Vol I/Cat $1500 REVISED & EXPANDED Contains over 2000 airplanes postage stamp size 6 ft wing span RCl Gliders rubber powered Die-cut you-cut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDINGI Vol I/Cat CORSAIR oaper airplane above $1800 plus $250 postage X Easily attached 25 108 size engine silencers FREEDOM 90 Muffler gives AMA recommended 90 dBA 9 silencing noise noise cornplaints Ensure yourX freedom fly Unchallenged through 90sX FREEDOM 90 Tested qualified US published engine reviewer Silences 50-98% engine noise WITHOUT POWER LOSSI Uc US SNUF-LER Patent #4858722 X CALL 1-800-NOW GO RC 1-800-669-4672 VISA AND MASTERCARD 309 Laurelwood #1accepted Add $250 shipping Please allow Santa Clara CA 950542 weeks delivery time jxxxxxxxxxxx model takes off about 10 ft less flies what might called fast trot still climbs about 500 ft per mm Its likely threat anything else field Valkyre really does tract crowd Building hints As true Electric project light structure essential wing tail de signs Old-Timers adequate addition some shear webs streng wings Some weight can saved laminating tip outlines several lay ers 1/16 balsa soaked water shaped over cardboard form Wing spars can either balsa carbon fiber inlays lam inates balsa carbon fiber spruce technique used uncov ered wing Powerhouse weighed 10 ounces opinion 34-oz Micafilm looks lot like doped silkspan best covering material models Fuselages can lightened great deal loss strength using smaller sizes wood Lining cabin ar eas produces very strong struc ture much increase weight Mo tor mounts can eliminated either strap ping electric motor nose block rubberbands making metal mount described Powerhouse choose mount battery inter nally must provide cooling air en try exit Mounting battery cav ity bottom fuselage de scribed Powerhouse provides maxi mum cooling ease service bother weight building cooling ducts First-time models should cabin de signs boxy fuselages since expe rience pylon designs streamlined fuse lages make mounting batteries radios very difficult Battery mounting should al low easy shifting batteries until find best CG location will often 50 60 percent range can build electric-powered OldTimer will weigh little original design through careful attention selection wood covering materials Depending selection power package flight patterns close origi nal near-vertical performance seen SAM contests can achieved built considerably above specified weight OldTimer designs have beautiful floating glides Its easy understand went OOS out-of-sight 15- 20-sec engine runs years ago have found Electric Old-Timers fun build fly Flight characteristics cover wide range depending power package used hope modelers will consider developing Electric /2A Texaco event using new 02 035 mo tors prefer events allow flight per Continued page 184 82 Model Aviation Paper Flying Scale Model Airplane $io ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE RONS MODEL Radio Controiled BUILDINGAirplanes Other Aircraft Boats 213 451-0414 ii Build Ry model should climb right turn glide left Glide controlled stabilizer tilt thickness aft incidence block Climb adjusted after satisfac tory glide trim has established Adjust climb small changes thrust line Thrust adjusted gently filing end motor tube change angle nose block rests very small increments Dont fly full power until youre completely satisfied models trim Make sure model climbs right turn avoid tendency loop hang prop power stall youre ready fly full power launch model about 450 angle tends go its pointed have flown few Conscientious Objectors just didnt want turn left glide ri diculous amount tilt stabilizer simply let turn right glide well climb Still unless really know what youre doing left glide right climb safe way go Dethermalizer accompanying photo dethermalizer shows its layout quite clearly guide tube under SHOC sta bilizer mount has multiple functions con ducts DT line keeps stabilizer rub bers touching line serves DT limit stop piece monofilament line can used DT line loop end fitted over peg top sta bilizer rubber must installed over loop stay place rubber loops over peg extends across leading edge stabilizer goes down around fuselage back up peg bit fuel tubing serves nicely DT line limit can tied line simple overhand knot adjusted strike line guide tube under SHOC mount tubing should adjusted allow about 450 stabilizer DT angle Tied other end DT line paper clip wire hook fuse rubberband extends hook across fuse around motor peg Use sharpened piece aluminum tubing drill holes fuselage makes cleaner hole does drill Use A-in tube fuse holder extending through both sides fuselage way can poke fuse material through piece wire can also pull out bit fuse case delay between lighting launching Glue tube firmly place heat sink can made alumi num can must selected care Ive used Coors Light cans cant say whether another brand would work well will gladly try answer questions might have about Conscientious Ob jector Send SASE 1902 Peter Pan St Norman OK 73072 responding advertisers mention read about Model Aviation Convert/McKinley Continued page 82 charge rather three some plan ning use small battery packs can aim think 20- 30-sec motor runs climb rates equal glow- ignition-powered models little no weight penalty Rally/Homer Continued page 88 forget did didnt fly AMA Rally Scobie Field Nor will other Houston modelers Bomber Field Club planning major event October Sev eral B-17s air simultaneously would something behold AMA Frequency Committee member George Steiner traveled Sacra mento CA teamed Bob Spivey Aus tin TX handle transmitter impound chores Charlie Marilyn Stevens Vance Dottie Wyman coordinated host local volunteers assist planning running event course rally would have possible efforts AMA HAMCI staff volunteers AMA Presi dent Don Lowe District VIH Vice Presi dent Gene Hempel AMA Executive Di rector Vince Mankowski hand Continued page 188 184 Model Aviation Caii Write 435 San Vicente Bivd J Santa Monica CA 90402 turn yoor printer lot oil plotter with.. FOILED AGAIN! C PLOT AIRFOILS IN ANY CIIORD u 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR 5HEETED WINGS ENTER DATA EASILY VIA INTELUGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED U5ER MANUAL $45oo a cram prom slain ~2Z4i IiwflaihOO COopuV ira dot INI Clv conwaS potfli tWo w* irding ipioty 550 o 30 dOic Sm ram urocoy ordi CYGNET Software714 4966961 24843 Del Prado #141B Dana Point CA 92629 CAPACITIVE-DISCHARGE IGNITION SEA5 AMAN No moving parts No eng ne mod oat ons Basic unit $ 9995 Opposedcylinder twin $ 11995 ELECTRONIC CIRCUITRY REPLACES ANY MECHANICAL ADVANCE MAKES MAGNETO CONVERSIONS SNAPII
Edition: Model Aviation - 1990/09
Page Numbers: 78, 79, 80, 81, 82, 184
Above left Ready fly Feather Merchant authors first Old-Timer converted electric power first Electric Leisure Playboy destroyed result battery failure Feather Merchant has exaggerated dihedral flies quite well CG 40 50 percent Above right After trying several motor/prop/battery combos geared Astro 05 pIctured proved best compromise runs seven 1 200-mAh cells swings Geist 13 x 6 foldIng prop Below left Theres plenty room servos on/off switches Velcrosecured receiver battery pack Below right Cooling air battery pack exits through vent slots built fuselage bottom WHEN ELECTRIC power first appeared Electric Old-Timer seemed ideal project because pressures career wasnt until 1985 found time build first Electric model Leisure Playboy geared 05 motor specifications airplane follow Leisure Playboy Span 67 weight 44 oz Area 576 sq Power Leisure LT5O 25/1 gear Battery six 1 200-mAh cells Best propeller 11 x 5 Modelers accustomed building sheet balsa foam will no doubt find challenging construction project however building Playboy like trip down memory lane mod els years ago fond recollections fi nally convinced start building OldTimers electric power reasonable care construction Playboy quite reliable performer think secret models success its very light airframe makes difficult Dr Cohn McKinley build overweight know Play boy weighs about 60 oz its still flying well Though model destroyed because battery failure other models de scribed article still flying writing Lehmberg Feather Merchant Span 72 weight 64 oz Area 660 sq Power Keller 25/12 Battery 12 800-mAli cells Best propeller 11 x 6 10 x 7 first attempt full Electric conver sion Lehmberg Feather Mer chant As project progressed became apparent using geared 05 motor Playboy would result marginal performance able purchase Kel ler 25/12 Toledo found great increase power opened up whole new world performancewith minimal weight increase Takeoff runs rough field just few feet three climbs 800 ft charge routine local SAM Society Antique Mod elers group allowed fly its contests giving extra 60-sec motor run subtracted end flight compensate extra weight Electric have able place both Limited Motor Run Antique events model Feather Merchant has exagger ated amount washout flies beautifully CG center-of-gravity 50 60 percent range Since Old-Timer plans dont show CO location new build ers often dont realize old designs lifting stabs intended fly CG positions far aft Often de signs seem fly poorly balanced 30 percent range us accus tomed Old-Timers have landing gear positioned far forward wing leading edge bad ground handling great saving props old days sufficient power well-built OldTimer gets air quickly landElectric OldTimers medley Old-Timer designs can easily converted elec tric power still have performance characteristics close equalling original glow-powered counterparts 78 Model Aviation model result its too heavy Based experience gained subsequent proj ects think could build almost pound lighter out compro mise strength model flies well moder ately aerobatic flat-bot stallation radio power system very difficult During construction forgot needed aft CG redo power ra dio installation its final form entire power system can serviced removing cowl cockpit natural cooling air exit well perfect place ser vos performance model made construction problems worthwhile climb rate probably good glow-powered Old-Timers very windy conditions think New Ruler has betTop picture Scientific Mercury conversion No 2 turned out too heavy will still fly moderate aerobatics pound less weight undercambered wings would make sing large fuselage served well test bed various systems Above left interior shot shows entire control setup including Jomar SC4 speed controller heat sink Above right Geist 30/10 motor aluminum mount runs 14 800-mAh cells best prop combo Geist folding 13 x 6 shown Below cooling air intake exhaust ing gear position doesnt seem great problem low-powered model might wise move gear back until wheels below leading edge wing will destroy look au thenticity Feather Merchant has now re powered geared Astro 05 using seven 1200-mAli cells 13 x 6 Geist fold ing propeller performance much im proved probably because big slow-moving prop better duplicates orig inal power setup smaller fastturning Keller power package wasted large airframe lot drag Scientific Mercury Span 72 weight 84 oz Area 720 sq Power Geist 30/10 Battery 14 800-mAh cells Best propeller Geist 13 x 6 folding Mercury chosen because think its realistic prettiest Old-Timer designs ever published Too much spruce ply used building tomed wing easy build cover lacks glide undercambered airfoil big roomy fuselage makes ideal test bed variety battery packs speed controls New Ruler Span 74 weight 96 oz Area 835 sq Power Keller 50/24 Battery 21 800-mAh cells Best propellers Geist 13 x 6 wood 12 x 6 consider New Ruler beautiful Old-Timer designs first project started using spruce/balsa laminates gain strength great gain weight project nearly disaster because started two sets plans speed up building process plans different sources varied up inch some critical measurements great deal models weight comes stringers formers used pro duce its streamlined shape pylon de sign plus streamlining made inter performance some lighter weight ships Miss America 4/7-scale Span 48 weight 32 oz Area 310 sq Power Astro 035 cobalt Battery five 800-mAh cells Best Propeller 7 x 4 wood model loosely based early 70s Micro Models kit kit de signed like tank present version lightened much possible Actually ribs tip outlines used original kit Youll find old designs have reasonable wing tail structures fuselages designed withstand stresses Free Flight test ing flying reasonable care de sign construction can often build Old-Timer electric power may come close design weight orig inal model will take off almost instantly slight headwind Ive logged several flights excess 20 minutes ther September 1990 79 Span 84 weight 100 oz Area 1126 sq Power Astro 60 cobalt Battery 24 800-mAh cells 28 400-mAh project began attempt con struct Electric model performance equal glow-powered ship Exten sive use made spruce balsa car bon fiber laminates using aluminum Above left Miss America based old Micro Models kit considerably lightened model takes off almost instantly ther mals beautifully logging flights over 20 minutes Above right Astro 035 cobalt motor secured rubberbands receiver battery oack fit below servos forward unit RJM on/off switch orog brake Below battery cooling air intake exhaust 80 Model Aviation Above left Sleek beautiful New Ruler quite striking built sprucelbaisa laminates save weight gain strength Perform ance outstanding climb rate equal Old-Timers Above right Side hatch removed showing access battery pack servos Below left Close-up Keller 50124 motor Installation standard automotive hose clamp holds motor place microawitch mounted bulkhead just above landing gear wire Below right control surface servos mounted cockpit less noisy what seen some contests Electrics reliable mals quite well weight 32 OZ IBest propeller 14 x 6 THP 14 x 6-10 entered Miss America /2A Texaco event able place fourthPowerhouseprogressive pitch Some consideration should given creating Texaco events electric power motor run small Astro co balt motors probably close Cox 049 electric power lot L Above len Ineyre getting iggeri owernouse its 84-in span powered Astro 60 cobalt motor designed equal glowpowered performance Extensive use spruce balsa carbon laminates kept strong light Above right An aluminum right angle tached balsa nose block serves motor mount Below left takes 28 450-mAh cells 24 900-mAh cells shown drive Astro 60 Below right interior layout showing microservos onloff switch wiring motor its aluminum mount angle ajig can lay up material wing spars fuselage longerons simul taneously Besides plywood dihedral braces landing gear mounts other plywood model /64 ply used line cabin area A6 ply battery mount surface outlines A6 balsa lami nates motor mount simple alumi num right angle thats attached balsa nose block wood screws set dowel plugs battery pack secured bot tom fuselage no special duct ing necessary cooling performance model compares favorably glow-powered versions has excellent glide characteristics can improved upon using smaller battery pack battery pack mounted floor cabin its exposed cooling easy changing yet visible model viewed directly below Because large size fuselage control linkages can internal no bends control reds allows use smallest servos available Ive no problems control system Power house model purchased another builder because wanted see air plane size would fly electric power motor attached standard en gine mounts couple Nyrod straps batteries wrapped foam rubber simply dropped fuselage Continued page 82 Left Goiberg Vaikyre its 1 20-in-span wing purchased author another builder order experiment electric power systems model size Astro 60 cobalt motor running 24 800-mAh cells swinging 14 x 6 prop plane will take off 10 feet has climb rate about 500 ft per mm flies fast trot motor standard mount battery simply wrapped foam dropped fuselage Right Valkyre silently soars stately pace over Michigan countryside September 1990 81 Battery 24 800-mAh cells Best propeller 14 x 6 SHOOT YOUR ENEMY DOWN LANIER RCs p-SI Sport CAT NO 74112 THE ORIGINATORS OF ALMOST-READY-TO-FLY AIRCRAFT MADE OF PLASTIC AND FOAM Fuselage Length 45 Rec Engine Size 45-60 4 Stroke 80-90 Flying Weight 6 lbs Wing Span 63 Area 630 sq Radio Channels 4 Available favorite Hobby Dealer Replacement parts available Dealer distributor Inquiries invited Write today free color catalog PO Box 458 Oakwood Georgia 30566 Made USA 404-532-6401 MLL PARTS PRE-CUT & PRE-PAINTED BUILD & FLY IN TWO HOURS PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Vol I/Cat $1500 REVISED & EXPANDED Contains over 2000 airplanes postage stamp size 6 ft wing span RCl Gliders rubber powered Die-cut you-cut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDINGI Vol I/Cat CORSAIR oaper airplane above $1800 plus $250 postage X Easily attached 25 108 size engine silencers FREEDOM 90 Muffler gives AMA recommended 90 dBA 9 silencing noise noise cornplaints Ensure yourX freedom fly Unchallenged through 90sX FREEDOM 90 Tested qualified US published engine reviewer Silences 50-98% engine noise WITHOUT POWER LOSSI Uc US SNUF-LER Patent #4858722 X CALL 1-800-NOW GO RC 1-800-669-4672 VISA AND MASTERCARD 309 Laurelwood #1accepted Add $250 shipping Please allow Santa Clara CA 950542 weeks delivery time jxxxxxxxxxxx model takes off about 10 ft less flies what might called fast trot still climbs about 500 ft per mm Its likely threat anything else field Valkyre really does tract crowd Building hints As true Electric project light structure essential wing tail de signs Old-Timers adequate addition some shear webs streng wings Some weight can saved laminating tip outlines several lay ers 1/16 balsa soaked water shaped over cardboard form Wing spars can either balsa carbon fiber inlays lam inates balsa carbon fiber spruce technique used uncov ered wing Powerhouse weighed 10 ounces opinion 34-oz Micafilm looks lot like doped silkspan best covering material models Fuselages can lightened great deal loss strength using smaller sizes wood Lining cabin ar eas produces very strong struc ture much increase weight Mo tor mounts can eliminated either strap ping electric motor nose block rubberbands making metal mount described Powerhouse choose mount battery inter nally must provide cooling air en try exit Mounting battery cav ity bottom fuselage de scribed Powerhouse provides maxi mum cooling ease service bother weight building cooling ducts First-time models should cabin de signs boxy fuselages since expe rience pylon designs streamlined fuse lages make mounting batteries radios very difficult Battery mounting should al low easy shifting batteries until find best CG location will often 50 60 percent range can build electric-powered OldTimer will weigh little original design through careful attention selection wood covering materials Depending selection power package flight patterns close origi nal near-vertical performance seen SAM contests can achieved built considerably above specified weight OldTimer designs have beautiful floating glides Its easy understand went OOS out-of-sight 15- 20-sec engine runs years ago have found Electric Old-Timers fun build fly Flight characteristics cover wide range depending power package used hope modelers will consider developing Electric /2A Texaco event using new 02 035 mo tors prefer events allow flight per Continued page 184 82 Model Aviation Paper Flying Scale Model Airplane $io ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE RONS MODEL Radio Controiled BUILDINGAirplanes Other Aircraft Boats 213 451-0414 ii Build Ry model should climb right turn glide left Glide controlled stabilizer tilt thickness aft incidence block Climb adjusted after satisfac tory glide trim has established Adjust climb small changes thrust line Thrust adjusted gently filing end motor tube change angle nose block rests very small increments Dont fly full power until youre completely satisfied models trim Make sure model climbs right turn avoid tendency loop hang prop power stall youre ready fly full power launch model about 450 angle tends go its pointed have flown few Conscientious Objectors just didnt want turn left glide ri diculous amount tilt stabilizer simply let turn right glide well climb Still unless really know what youre doing left glide right climb safe way go Dethermalizer accompanying photo dethermalizer shows its layout quite clearly guide tube under SHOC sta bilizer mount has multiple functions con ducts DT line keeps stabilizer rub bers touching line serves DT limit stop piece monofilament line can used DT line loop end fitted over peg top sta bilizer rubber must installed over loop stay place rubber loops over peg extends across leading edge stabilizer goes down around fuselage back up peg bit fuel tubing serves nicely DT line limit can tied line simple overhand knot adjusted strike line guide tube under SHOC mount tubing should adjusted allow about 450 stabilizer DT angle Tied other end DT line paper clip wire hook fuse rubberband extends hook across fuse around motor peg Use sharpened piece aluminum tubing drill holes fuselage makes cleaner hole does drill Use A-in tube fuse holder extending through both sides fuselage way can poke fuse material through piece wire can also pull out bit fuse case delay between lighting launching Glue tube firmly place heat sink can made alumi num can must selected care Ive used Coors Light cans cant say whether another brand would work well will gladly try answer questions might have about Conscientious Ob jector Send SASE 1902 Peter Pan St Norman OK 73072 responding advertisers mention read about Model Aviation Convert/McKinley Continued page 82 charge rather three some plan ning use small battery packs can aim think 20- 30-sec motor runs climb rates equal glow- ignition-powered models little no weight penalty Rally/Homer Continued page 88 forget did didnt fly AMA Rally Scobie Field Nor will other Houston modelers Bomber Field Club planning major event October Sev eral B-17s air simultaneously would something behold AMA Frequency Committee member George Steiner traveled Sacra mento CA teamed Bob Spivey Aus tin TX handle transmitter impound chores Charlie Marilyn Stevens Vance Dottie Wyman coordinated host local volunteers assist planning running event course rally would have possible efforts AMA HAMCI staff volunteers AMA Presi dent Don Lowe District VIH Vice Presi dent Gene Hempel AMA Executive Di rector Vince Mankowski hand Continued page 188 184 Model Aviation Caii Write 435 San Vicente Bivd J Santa Monica CA 90402 turn yoor printer lot oil plotter with.. FOILED AGAIN! C PLOT AIRFOILS IN ANY CIIORD u 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR 5HEETED WINGS ENTER DATA EASILY VIA INTELUGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED U5ER MANUAL $45oo a cram prom slain ~2Z4i IiwflaihOO COopuV ira dot INI Clv conwaS potfli tWo w* irding ipioty 550 o 30 dOic Sm ram urocoy ordi CYGNET Software714 4966961 24843 Del Prado #141B Dana Point CA 92629 CAPACITIVE-DISCHARGE IGNITION SEA5 AMAN No moving parts No eng ne mod oat ons Basic unit $ 9995 Opposedcylinder twin $ 11995 ELECTRONIC CIRCUITRY REPLACES ANY MECHANICAL ADVANCE MAKES MAGNETO CONVERSIONS SNAPII
Edition: Model Aviation - 1990/09
Page Numbers: 78, 79, 80, 81, 82, 184
Above left Ready fly Feather Merchant authors first Old-Timer converted electric power first Electric Leisure Playboy destroyed result battery failure Feather Merchant has exaggerated dihedral flies quite well CG 40 50 percent Above right After trying several motor/prop/battery combos geared Astro 05 pIctured proved best compromise runs seven 1 200-mAh cells swings Geist 13 x 6 foldIng prop Below left Theres plenty room servos on/off switches Velcrosecured receiver battery pack Below right Cooling air battery pack exits through vent slots built fuselage bottom WHEN ELECTRIC power first appeared Electric Old-Timer seemed ideal project because pressures career wasnt until 1985 found time build first Electric model Leisure Playboy geared 05 motor specifications airplane follow Leisure Playboy Span 67 weight 44 oz Area 576 sq Power Leisure LT5O 25/1 gear Battery six 1 200-mAh cells Best propeller 11 x 5 Modelers accustomed building sheet balsa foam will no doubt find challenging construction project however building Playboy like trip down memory lane mod els years ago fond recollections fi nally convinced start building OldTimers electric power reasonable care construction Playboy quite reliable performer think secret models success its very light airframe makes difficult Dr Cohn McKinley build overweight know Play boy weighs about 60 oz its still flying well Though model destroyed because battery failure other models de scribed article still flying writing Lehmberg Feather Merchant Span 72 weight 64 oz Area 660 sq Power Keller 25/12 Battery 12 800-mAli cells Best propeller 11 x 6 10 x 7 first attempt full Electric conver sion Lehmberg Feather Mer chant As project progressed became apparent using geared 05 motor Playboy would result marginal performance able purchase Kel ler 25/12 Toledo found great increase power opened up whole new world performancewith minimal weight increase Takeoff runs rough field just few feet three climbs 800 ft charge routine local SAM Society Antique Mod elers group allowed fly its contests giving extra 60-sec motor run subtracted end flight compensate extra weight Electric have able place both Limited Motor Run Antique events model Feather Merchant has exagger ated amount washout flies beautifully CG center-of-gravity 50 60 percent range Since Old-Timer plans dont show CO location new build ers often dont realize old designs lifting stabs intended fly CG positions far aft Often de signs seem fly poorly balanced 30 percent range us accus tomed Old-Timers have landing gear positioned far forward wing leading edge bad ground handling great saving props old days sufficient power well-built OldTimer gets air quickly landElectric OldTimers medley Old-Timer designs can easily converted elec tric power still have performance characteristics close equalling original glow-powered counterparts 78 Model Aviation model result its too heavy Based experience gained subsequent proj ects think could build almost pound lighter out compro mise strength model flies well moder ately aerobatic flat-bot stallation radio power system very difficult During construction forgot needed aft CG redo power ra dio installation its final form entire power system can serviced removing cowl cockpit natural cooling air exit well perfect place ser vos performance model made construction problems worthwhile climb rate probably good glow-powered Old-Timers very windy conditions think New Ruler has betTop picture Scientific Mercury conversion No 2 turned out too heavy will still fly moderate aerobatics pound less weight undercambered wings would make sing large fuselage served well test bed various systems Above left interior shot shows entire control setup including Jomar SC4 speed controller heat sink Above right Geist 30/10 motor aluminum mount runs 14 800-mAh cells best prop combo Geist folding 13 x 6 shown Below cooling air intake exhaust ing gear position doesnt seem great problem low-powered model might wise move gear back until wheels below leading edge wing will destroy look au thenticity Feather Merchant has now re powered geared Astro 05 using seven 1200-mAli cells 13 x 6 Geist fold ing propeller performance much im proved probably because big slow-moving prop better duplicates orig inal power setup smaller fastturning Keller power package wasted large airframe lot drag Scientific Mercury Span 72 weight 84 oz Area 720 sq Power Geist 30/10 Battery 14 800-mAh cells Best propeller Geist 13 x 6 folding Mercury chosen because think its realistic prettiest Old-Timer designs ever published Too much spruce ply used building tomed wing easy build cover lacks glide undercambered airfoil big roomy fuselage makes ideal test bed variety battery packs speed controls New Ruler Span 74 weight 96 oz Area 835 sq Power Keller 50/24 Battery 21 800-mAh cells Best propellers Geist 13 x 6 wood 12 x 6 consider New Ruler beautiful Old-Timer designs first project started using spruce/balsa laminates gain strength great gain weight project nearly disaster because started two sets plans speed up building process plans different sources varied up inch some critical measurements great deal models weight comes stringers formers used pro duce its streamlined shape pylon de sign plus streamlining made inter performance some lighter weight ships Miss America 4/7-scale Span 48 weight 32 oz Area 310 sq Power Astro 035 cobalt Battery five 800-mAh cells Best Propeller 7 x 4 wood model loosely based early 70s Micro Models kit kit de signed like tank present version lightened much possible Actually ribs tip outlines used original kit Youll find old designs have reasonable wing tail structures fuselages designed withstand stresses Free Flight test ing flying reasonable care de sign construction can often build Old-Timer electric power may come close design weight orig inal model will take off almost instantly slight headwind Ive logged several flights excess 20 minutes ther September 1990 79 Span 84 weight 100 oz Area 1126 sq Power Astro 60 cobalt Battery 24 800-mAh cells 28 400-mAh project began attempt con struct Electric model performance equal glow-powered ship Exten sive use made spruce balsa car bon fiber laminates using aluminum Above left Miss America based old Micro Models kit considerably lightened model takes off almost instantly ther mals beautifully logging flights over 20 minutes Above right Astro 035 cobalt motor secured rubberbands receiver battery oack fit below servos forward unit RJM on/off switch orog brake Below battery cooling air intake exhaust 80 Model Aviation Above left Sleek beautiful New Ruler quite striking built sprucelbaisa laminates save weight gain strength Perform ance outstanding climb rate equal Old-Timers Above right Side hatch removed showing access battery pack servos Below left Close-up Keller 50124 motor Installation standard automotive hose clamp holds motor place microawitch mounted bulkhead just above landing gear wire Below right control surface servos mounted cockpit less noisy what seen some contests Electrics reliable mals quite well weight 32 OZ IBest propeller 14 x 6 THP 14 x 6-10 entered Miss America /2A Texaco event able place fourthPowerhouseprogressive pitch Some consideration should given creating Texaco events electric power motor run small Astro co balt motors probably close Cox 049 electric power lot L Above len Ineyre getting iggeri owernouse its 84-in span powered Astro 60 cobalt motor designed equal glowpowered performance Extensive use spruce balsa carbon laminates kept strong light Above right An aluminum right angle tached balsa nose block serves motor mount Below left takes 28 450-mAh cells 24 900-mAh cells shown drive Astro 60 Below right interior layout showing microservos onloff switch wiring motor its aluminum mount angle ajig can lay up material wing spars fuselage longerons simul taneously Besides plywood dihedral braces landing gear mounts other plywood model /64 ply used line cabin area A6 ply battery mount surface outlines A6 balsa lami nates motor mount simple alumi num right angle thats attached balsa nose block wood screws set dowel plugs battery pack secured bot tom fuselage no special duct ing necessary cooling performance model compares favorably glow-powered versions has excellent glide characteristics can improved upon using smaller battery pack battery pack mounted floor cabin its exposed cooling easy changing yet visible model viewed directly below Because large size fuselage control linkages can internal no bends control reds allows use smallest servos available Ive no problems control system Power house model purchased another builder because wanted see air plane size would fly electric power motor attached standard en gine mounts couple Nyrod straps batteries wrapped foam rubber simply dropped fuselage Continued page 82 Left Goiberg Vaikyre its 1 20-in-span wing purchased author another builder order experiment electric power systems model size Astro 60 cobalt motor running 24 800-mAh cells swinging 14 x 6 prop plane will take off 10 feet has climb rate about 500 ft per mm flies fast trot motor standard mount battery simply wrapped foam dropped fuselage Right Valkyre silently soars stately pace over Michigan countryside September 1990 81 Battery 24 800-mAh cells Best propeller 14 x 6 SHOOT YOUR ENEMY DOWN LANIER RCs p-SI Sport CAT NO 74112 THE ORIGINATORS OF ALMOST-READY-TO-FLY AIRCRAFT MADE OF PLASTIC AND FOAM Fuselage Length 45 Rec Engine Size 45-60 4 Stroke 80-90 Flying Weight 6 lbs Wing Span 63 Area 630 sq Radio Channels 4 Available favorite Hobby Dealer Replacement parts available Dealer distributor Inquiries invited Write today free color catalog PO Box 458 Oakwood Georgia 30566 Made USA 404-532-6401 MLL PARTS PRE-CUT & PRE-PAINTED BUILD & FLY IN TWO HOURS PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Vol I/Cat $1500 REVISED & EXPANDED Contains over 2000 airplanes postage stamp size 6 ft wing span RCl Gliders rubber powered Die-cut you-cut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDINGI Vol I/Cat CORSAIR oaper airplane above $1800 plus $250 postage X Easily attached 25 108 size engine silencers FREEDOM 90 Muffler gives AMA recommended 90 dBA 9 silencing noise noise cornplaints Ensure yourX freedom fly Unchallenged through 90sX FREEDOM 90 Tested qualified US published engine reviewer Silences 50-98% engine noise WITHOUT POWER LOSSI Uc US SNUF-LER Patent #4858722 X CALL 1-800-NOW GO RC 1-800-669-4672 VISA AND MASTERCARD 309 Laurelwood #1accepted Add $250 shipping Please allow Santa Clara CA 950542 weeks delivery time jxxxxxxxxxxx model takes off about 10 ft less flies what might called fast trot still climbs about 500 ft per mm Its likely threat anything else field Valkyre really does tract crowd Building hints As true Electric project light structure essential wing tail de signs Old-Timers adequate addition some shear webs streng wings Some weight can saved laminating tip outlines several lay ers 1/16 balsa soaked water shaped over cardboard form Wing spars can either balsa carbon fiber inlays lam inates balsa carbon fiber spruce technique used uncov ered wing Powerhouse weighed 10 ounces opinion 34-oz Micafilm looks lot like doped silkspan best covering material models Fuselages can lightened great deal loss strength using smaller sizes wood Lining cabin ar eas produces very strong struc ture much increase weight Mo tor mounts can eliminated either strap ping electric motor nose block rubberbands making metal mount described Powerhouse choose mount battery inter nally must provide cooling air en try exit Mounting battery cav ity bottom fuselage de scribed Powerhouse provides maxi mum cooling ease service bother weight building cooling ducts First-time models should cabin de signs boxy fuselages since expe rience pylon designs streamlined fuse lages make mounting batteries radios very difficult Battery mounting should al low easy shifting batteries until find best CG location will often 50 60 percent range can build electric-powered OldTimer will weigh little original design through careful attention selection wood covering materials Depending selection power package flight patterns close origi nal near-vertical performance seen SAM contests can achieved built considerably above specified weight OldTimer designs have beautiful floating glides Its easy understand went OOS out-of-sight 15- 20-sec engine runs years ago have found Electric Old-Timers fun build fly Flight characteristics cover wide range depending power package used hope modelers will consider developing Electric /2A Texaco event using new 02 035 mo tors prefer events allow flight per Continued page 184 82 Model Aviation Paper Flying Scale Model Airplane $io ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE RONS MODEL Radio Controiled BUILDINGAirplanes Other Aircraft Boats 213 451-0414 ii Build Ry model should climb right turn glide left Glide controlled stabilizer tilt thickness aft incidence block Climb adjusted after satisfac tory glide trim has established Adjust climb small changes thrust line Thrust adjusted gently filing end motor tube change angle nose block rests very small increments Dont fly full power until youre completely satisfied models trim Make sure model climbs right turn avoid tendency loop hang prop power stall youre ready fly full power launch model about 450 angle tends go its pointed have flown few Conscientious Objectors just didnt want turn left glide ri diculous amount tilt stabilizer simply let turn right glide well climb Still unless really know what youre doing left glide right climb safe way go Dethermalizer accompanying photo dethermalizer shows its layout quite clearly guide tube under SHOC sta bilizer mount has multiple functions con ducts DT line keeps stabilizer rub bers touching line serves DT limit stop piece monofilament line can used DT line loop end fitted over peg top sta bilizer rubber must installed over loop stay place rubber loops over peg extends across leading edge stabilizer goes down around fuselage back up peg bit fuel tubing serves nicely DT line limit can tied line simple overhand knot adjusted strike line guide tube under SHOC mount tubing should adjusted allow about 450 stabilizer DT angle Tied other end DT line paper clip wire hook fuse rubberband extends hook across fuse around motor peg Use sharpened piece aluminum tubing drill holes fuselage makes cleaner hole does drill Use A-in tube fuse holder extending through both sides fuselage way can poke fuse material through piece wire can also pull out bit fuse case delay between lighting launching Glue tube firmly place heat sink can made alumi num can must selected care Ive used Coors Light cans cant say whether another brand would work well will gladly try answer questions might have about Conscientious Ob jector Send SASE 1902 Peter Pan St Norman OK 73072 responding advertisers mention read about Model Aviation Convert/McKinley Continued page 82 charge rather three some plan ning use small battery packs can aim think 20- 30-sec motor runs climb rates equal glow- ignition-powered models little no weight penalty Rally/Homer Continued page 88 forget did didnt fly AMA Rally Scobie Field Nor will other Houston modelers Bomber Field Club planning major event October Sev eral B-17s air simultaneously would something behold AMA Frequency Committee member George Steiner traveled Sacra mento CA teamed Bob Spivey Aus tin TX handle transmitter impound chores Charlie Marilyn Stevens Vance Dottie Wyman coordinated host local volunteers assist planning running event course rally would have possible efforts AMA HAMCI staff volunteers AMA Presi dent Don Lowe District VIH Vice Presi dent Gene Hempel AMA Executive Di rector Vince Mankowski hand Continued page 188 184 Model Aviation Caii Write 435 San Vicente Bivd J Santa Monica CA 90402 turn yoor printer lot oil plotter with.. FOILED AGAIN! C PLOT AIRFOILS IN ANY CIIORD u 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR 5HEETED WINGS ENTER DATA EASILY VIA INTELUGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED U5ER MANUAL $45oo a cram prom slain ~2Z4i IiwflaihOO COopuV ira dot INI Clv conwaS potfli tWo w* irding ipioty 550 o 30 dOic Sm ram urocoy ordi CYGNET Software714 4966961 24843 Del Prado #141B Dana Point CA 92629 CAPACITIVE-DISCHARGE IGNITION SEA5 AMAN No moving parts No eng ne mod oat ons Basic unit $ 9995 Opposedcylinder twin $ 11995 ELECTRONIC CIRCUITRY REPLACES ANY MECHANICAL ADVANCE MAKES MAGNETO CONVERSIONS SNAPII
Edition: Model Aviation - 1990/09
Page Numbers: 78, 79, 80, 81, 82, 184
Above left Ready fly Feather Merchant authors first Old-Timer converted electric power first Electric Leisure Playboy destroyed result battery failure Feather Merchant has exaggerated dihedral flies quite well CG 40 50 percent Above right After trying several motor/prop/battery combos geared Astro 05 pIctured proved best compromise runs seven 1 200-mAh cells swings Geist 13 x 6 foldIng prop Below left Theres plenty room servos on/off switches Velcrosecured receiver battery pack Below right Cooling air battery pack exits through vent slots built fuselage bottom WHEN ELECTRIC power first appeared Electric Old-Timer seemed ideal project because pressures career wasnt until 1985 found time build first Electric model Leisure Playboy geared 05 motor specifications airplane follow Leisure Playboy Span 67 weight 44 oz Area 576 sq Power Leisure LT5O 25/1 gear Battery six 1 200-mAh cells Best propeller 11 x 5 Modelers accustomed building sheet balsa foam will no doubt find challenging construction project however building Playboy like trip down memory lane mod els years ago fond recollections fi nally convinced start building OldTimers electric power reasonable care construction Playboy quite reliable performer think secret models success its very light airframe makes difficult Dr Cohn McKinley build overweight know Play boy weighs about 60 oz its still flying well Though model destroyed because battery failure other models de scribed article still flying writing Lehmberg Feather Merchant Span 72 weight 64 oz Area 660 sq Power Keller 25/12 Battery 12 800-mAli cells Best propeller 11 x 6 10 x 7 first attempt full Electric conver sion Lehmberg Feather Mer chant As project progressed became apparent using geared 05 motor Playboy would result marginal performance able purchase Kel ler 25/12 Toledo found great increase power opened up whole new world performancewith minimal weight increase Takeoff runs rough field just few feet three climbs 800 ft charge routine local SAM Society Antique Mod elers group allowed fly its contests giving extra 60-sec motor run subtracted end flight compensate extra weight Electric have able place both Limited Motor Run Antique events model Feather Merchant has exagger ated amount washout flies beautifully CG center-of-gravity 50 60 percent range Since Old-Timer plans dont show CO location new build ers often dont realize old designs lifting stabs intended fly CG positions far aft Often de signs seem fly poorly balanced 30 percent range us accus tomed Old-Timers have landing gear positioned far forward wing leading edge bad ground handling great saving props old days sufficient power well-built OldTimer gets air quickly landElectric OldTimers medley Old-Timer designs can easily converted elec tric power still have performance characteristics close equalling original glow-powered counterparts 78 Model Aviation model result its too heavy Based experience gained subsequent proj ects think could build almost pound lighter out compro mise strength model flies well moder ately aerobatic flat-bot stallation radio power system very difficult During construction forgot needed aft CG redo power ra dio installation its final form entire power system can serviced removing cowl cockpit natural cooling air exit well perfect place ser vos performance model made construction problems worthwhile climb rate probably good glow-powered Old-Timers very windy conditions think New Ruler has betTop picture Scientific Mercury conversion No 2 turned out too heavy will still fly moderate aerobatics pound less weight undercambered wings would make sing large fuselage served well test bed various systems Above left interior shot shows entire control setup including Jomar SC4 speed controller heat sink Above right Geist 30/10 motor aluminum mount runs 14 800-mAh cells best prop combo Geist folding 13 x 6 shown Below cooling air intake exhaust ing gear position doesnt seem great problem low-powered model might wise move gear back until wheels below leading edge wing will destroy look au thenticity Feather Merchant has now re powered geared Astro 05 using seven 1200-mAli cells 13 x 6 Geist fold ing propeller performance much im proved probably because big slow-moving prop better duplicates orig inal power setup smaller fastturning Keller power package wasted large airframe lot drag Scientific Mercury Span 72 weight 84 oz Area 720 sq Power Geist 30/10 Battery 14 800-mAh cells Best propeller Geist 13 x 6 folding Mercury chosen because think its realistic prettiest Old-Timer designs ever published Too much spruce ply used building tomed wing easy build cover lacks glide undercambered airfoil big roomy fuselage makes ideal test bed variety battery packs speed controls New Ruler Span 74 weight 96 oz Area 835 sq Power Keller 50/24 Battery 21 800-mAh cells Best propellers Geist 13 x 6 wood 12 x 6 consider New Ruler beautiful Old-Timer designs first project started using spruce/balsa laminates gain strength great gain weight project nearly disaster because started two sets plans speed up building process plans different sources varied up inch some critical measurements great deal models weight comes stringers formers used pro duce its streamlined shape pylon de sign plus streamlining made inter performance some lighter weight ships Miss America 4/7-scale Span 48 weight 32 oz Area 310 sq Power Astro 035 cobalt Battery five 800-mAh cells Best Propeller 7 x 4 wood model loosely based early 70s Micro Models kit kit de signed like tank present version lightened much possible Actually ribs tip outlines used original kit Youll find old designs have reasonable wing tail structures fuselages designed withstand stresses Free Flight test ing flying reasonable care de sign construction can often build Old-Timer electric power may come close design weight orig inal model will take off almost instantly slight headwind Ive logged several flights excess 20 minutes ther September 1990 79 Span 84 weight 100 oz Area 1126 sq Power Astro 60 cobalt Battery 24 800-mAh cells 28 400-mAh project began attempt con struct Electric model performance equal glow-powered ship Exten sive use made spruce balsa car bon fiber laminates using aluminum Above left Miss America based old Micro Models kit considerably lightened model takes off almost instantly ther mals beautifully logging flights over 20 minutes Above right Astro 035 cobalt motor secured rubberbands receiver battery oack fit below servos forward unit RJM on/off switch orog brake Below battery cooling air intake exhaust 80 Model Aviation Above left Sleek beautiful New Ruler quite striking built sprucelbaisa laminates save weight gain strength Perform ance outstanding climb rate equal Old-Timers Above right Side hatch removed showing access battery pack servos Below left Close-up Keller 50124 motor Installation standard automotive hose clamp holds motor place microawitch mounted bulkhead just above landing gear wire Below right control surface servos mounted cockpit less noisy what seen some contests Electrics reliable mals quite well weight 32 OZ IBest propeller 14 x 6 THP 14 x 6-10 entered Miss America /2A Texaco event able place fourthPowerhouseprogressive pitch Some consideration should given creating Texaco events electric power motor run small Astro co balt motors probably close Cox 049 electric power lot L Above len Ineyre getting iggeri owernouse its 84-in span powered Astro 60 cobalt motor designed equal glowpowered performance Extensive use spruce balsa carbon laminates kept strong light Above right An aluminum right angle tached balsa nose block serves motor mount Below left takes 28 450-mAh cells 24 900-mAh cells shown drive Astro 60 Below right interior layout showing microservos onloff switch wiring motor its aluminum mount angle ajig can lay up material wing spars fuselage longerons simul taneously Besides plywood dihedral braces landing gear mounts other plywood model /64 ply used line cabin area A6 ply battery mount surface outlines A6 balsa lami nates motor mount simple alumi num right angle thats attached balsa nose block wood screws set dowel plugs battery pack secured bot tom fuselage no special duct ing necessary cooling performance model compares favorably glow-powered versions has excellent glide characteristics can improved upon using smaller battery pack battery pack mounted floor cabin its exposed cooling easy changing yet visible model viewed directly below Because large size fuselage control linkages can internal no bends control reds allows use smallest servos available Ive no problems control system Power house model purchased another builder because wanted see air plane size would fly electric power motor attached standard en gine mounts couple Nyrod straps batteries wrapped foam rubber simply dropped fuselage Continued page 82 Left Goiberg Vaikyre its 1 20-in-span wing purchased author another builder order experiment electric power systems model size Astro 60 cobalt motor running 24 800-mAh cells swinging 14 x 6 prop plane will take off 10 feet has climb rate about 500 ft per mm flies fast trot motor standard mount battery simply wrapped foam dropped fuselage Right Valkyre silently soars stately pace over Michigan countryside September 1990 81 Battery 24 800-mAh cells Best propeller 14 x 6 SHOOT YOUR ENEMY DOWN LANIER RCs p-SI Sport CAT NO 74112 THE ORIGINATORS OF ALMOST-READY-TO-FLY AIRCRAFT MADE OF PLASTIC AND FOAM Fuselage Length 45 Rec Engine Size 45-60 4 Stroke 80-90 Flying Weight 6 lbs Wing Span 63 Area 630 sq Radio Channels 4 Available favorite Hobby Dealer Replacement parts available Dealer distributor Inquiries invited Write today free color catalog PO Box 458 Oakwood Georgia 30566 Made USA 404-532-6401 MLL PARTS PRE-CUT & PRE-PAINTED BUILD & FLY IN TWO HOURS PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Vol I/Cat $1500 REVISED & EXPANDED Contains over 2000 airplanes postage stamp size 6 ft wing span RCl Gliders rubber powered Die-cut you-cut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDINGI Vol I/Cat CORSAIR oaper airplane above $1800 plus $250 postage X Easily attached 25 108 size engine silencers FREEDOM 90 Muffler gives AMA recommended 90 dBA 9 silencing noise noise cornplaints Ensure yourX freedom fly Unchallenged through 90sX FREEDOM 90 Tested qualified US published engine reviewer Silences 50-98% engine noise WITHOUT POWER LOSSI Uc US SNUF-LER Patent #4858722 X CALL 1-800-NOW GO RC 1-800-669-4672 VISA AND MASTERCARD 309 Laurelwood #1accepted Add $250 shipping Please allow Santa Clara CA 950542 weeks delivery time jxxxxxxxxxxx model takes off about 10 ft less flies what might called fast trot still climbs about 500 ft per mm Its likely threat anything else field Valkyre really does tract crowd Building hints As true Electric project light structure essential wing tail de signs Old-Timers adequate addition some shear webs streng wings Some weight can saved laminating tip outlines several lay ers 1/16 balsa soaked water shaped over cardboard form Wing spars can either balsa carbon fiber inlays lam inates balsa carbon fiber spruce technique used uncov ered wing Powerhouse weighed 10 ounces opinion 34-oz Micafilm looks lot like doped silkspan best covering material models Fuselages can lightened great deal loss strength using smaller sizes wood Lining cabin ar eas produces very strong struc ture much increase weight Mo tor mounts can eliminated either strap ping electric motor nose block rubberbands making metal mount described Powerhouse choose mount battery inter nally must provide cooling air en try exit Mounting battery cav ity bottom fuselage de scribed Powerhouse provides maxi mum cooling ease service bother weight building cooling ducts First-time models should cabin de signs boxy fuselages since expe rience pylon designs streamlined fuse lages make mounting batteries radios very difficult Battery mounting should al low easy shifting batteries until find best CG location will often 50 60 percent range can build electric-powered OldTimer will weigh little original design through careful attention selection wood covering materials Depending selection power package flight patterns close origi nal near-vertical performance seen SAM contests can achieved built considerably above specified weight OldTimer designs have beautiful floating glides Its easy understand went OOS out-of-sight 15- 20-sec engine runs years ago have found Electric Old-Timers fun build fly Flight characteristics cover wide range depending power package used hope modelers will consider developing Electric /2A Texaco event using new 02 035 mo tors prefer events allow flight per Continued page 184 82 Model Aviation Paper Flying Scale Model Airplane $io ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE RONS MODEL Radio Controiled BUILDINGAirplanes Other Aircraft Boats 213 451-0414 ii Build Ry model should climb right turn glide left Glide controlled stabilizer tilt thickness aft incidence block Climb adjusted after satisfac tory glide trim has established Adjust climb small changes thrust line Thrust adjusted gently filing end motor tube change angle nose block rests very small increments Dont fly full power until youre completely satisfied models trim Make sure model climbs right turn avoid tendency loop hang prop power stall youre ready fly full power launch model about 450 angle tends go its pointed have flown few Conscientious Objectors just didnt want turn left glide ri diculous amount tilt stabilizer simply let turn right glide well climb Still unless really know what youre doing left glide right climb safe way go Dethermalizer accompanying photo dethermalizer shows its layout quite clearly guide tube under SHOC sta bilizer mount has multiple functions con ducts DT line keeps stabilizer rub bers touching line serves DT limit stop piece monofilament line can used DT line loop end fitted over peg top sta bilizer rubber must installed over loop stay place rubber loops over peg extends across leading edge stabilizer goes down around fuselage back up peg bit fuel tubing serves nicely DT line limit can tied line simple overhand knot adjusted strike line guide tube under SHOC mount tubing should adjusted allow about 450 stabilizer DT angle Tied other end DT line paper clip wire hook fuse rubberband extends hook across fuse around motor peg Use sharpened piece aluminum tubing drill holes fuselage makes cleaner hole does drill Use A-in tube fuse holder extending through both sides fuselage way can poke fuse material through piece wire can also pull out bit fuse case delay between lighting launching Glue tube firmly place heat sink can made alumi num can must selected care Ive used Coors Light cans cant say whether another brand would work well will gladly try answer questions might have about Conscientious Ob jector Send SASE 1902 Peter Pan St Norman OK 73072 responding advertisers mention read about Model Aviation Convert/McKinley Continued page 82 charge rather three some plan ning use small battery packs can aim think 20- 30-sec motor runs climb rates equal glow- ignition-powered models little no weight penalty Rally/Homer Continued page 88 forget did didnt fly AMA Rally Scobie Field Nor will other Houston modelers Bomber Field Club planning major event October Sev eral B-17s air simultaneously would something behold AMA Frequency Committee member George Steiner traveled Sacra mento CA teamed Bob Spivey Aus tin TX handle transmitter impound chores Charlie Marilyn Stevens Vance Dottie Wyman coordinated host local volunteers assist planning running event course rally would have possible efforts AMA HAMCI staff volunteers AMA Presi dent Don Lowe District VIH Vice Presi dent Gene Hempel AMA Executive Di rector Vince Mankowski hand Continued page 188 184 Model Aviation Caii Write 435 San Vicente Bivd J Santa Monica CA 90402 turn yoor printer lot oil plotter with.. FOILED AGAIN! C PLOT AIRFOILS IN ANY CIIORD u 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR 5HEETED WINGS ENTER DATA EASILY VIA INTELUGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED U5ER MANUAL $45oo a cram prom slain ~2Z4i IiwflaihOO COopuV ira dot INI Clv conwaS potfli tWo w* irding ipioty 550 o 30 dOic Sm ram urocoy ordi CYGNET Software714 4966961 24843 Del Prado #141B Dana Point CA 92629 CAPACITIVE-DISCHARGE IGNITION SEA5 AMAN No moving parts No eng ne mod oat ons Basic unit $ 9995 Opposedcylinder twin $ 11995 ELECTRONIC CIRCUITRY REPLACES ANY MECHANICAL ADVANCE MAKES MAGNETO CONVERSIONS SNAPII