SIMPLE JIGS fuselage alignment subject some photos recent col umns reminded Ed Lidgard sent some photos quite ago Two Eds photos selected month show very genious effective use cardboard hold parts place future columns will show some photographs space permits Ed Lidgard known designer HiHo Eugene Sparky name few popular designs member US Wakefield team several times ability wind rubber motor breaking turns anybody else legendary Considering can imagine surprise phoned night said over Sal Taibis house Sal making Hi-Ho asked him center-of-gravity should couldnt remem ber knew flying well called held phone went out garage put plane together loaded motor found CG About 64% chord would say question him didnt put CG plans 1941 answer great dont know have talked several designers Old-Timer era put same question basic answer seems con sidered model unique therefore requir ing unique combination CG position gles incidence flying surfaces en gines seldom shown plans down side thrust can bet models flew once some Rubber models almost invariably need both down right thrust drawn thrust line parallel centerline fuselage Often incidence blocks chunks wood shim routinely put under leading edge wing before model would flyable never mention plans youd find admonition ar ticle adjust care something else equally helpful serious omission CG po sition Nothing has greater effect per formance Free Flight model location CG know longer tail moment arms larger stabs CG can farther aft performance improved hut far aft far enough far too far CG too far forward ship loopy needs too much downthrust may easy trim super stable low power higher power becomes just about impossi ble trim out So what its too far aft remember spectac ular Civy Boy huge thing about 1200 sq wing area maybe bellowing MCCoy 60 Strong men quaked children followed mothers shelter cars birds left county some cows went dry builder let thing loose went way pointed good Civy Boys wont straight up What relief mighty McCoy fell silent huge model hung moment suspended swapped ends came down like went up straight hit 10 ft launch point tribute builders accurate construction alignment considering velocity attained point CG too far aft some thing lost stability saw way de signer Civy Boy Paul Gilliam fly right aimed up about 600 angle went way going fast en gine cut flew transition like door Hand-Launched Glider speed climb awesome its day due part low incidence permit ted long tail moment very large over 50% wing area stab aft CG lo cated 100% wing chordor skating thin ice stability Forget ROG really sight see ROW rise-off-waterEd day Nats ran full length water tank tails up digress talking about CG location helpful significant article ever pub lished opinion Tail Volume CG Location Bill Bogart Bud Rhodes published Model Airplane News January 1959 say may have misplaced sue Well probably best thing to look up copy 1959/61 Model Aer onautic Yearbook Zaic can buy book AMAs Supply Service Department FAL Model Supply Hannans Hangar Frank Zaic himself PO Box 135 Northridge CA 91328 MAN article con densed Yearbook data Continued page 160 Ed Lidgards recent photos fuselage jig used constructing Rubber model Look closely see centerline pencilled 2 x 4 base Various cardboard clamps its own centerline inscribed attached base bulletin board pins old mas ters careful builders also Indoor fliersa discipline construction jigs have always frequent use 74 Model Aviation Free Flight Old-Timers Bill Baker 1902 Peter Pan Norman OK 73072 David Rosenbergs shot Ed Lidgard 1940 Canadian Nationals Model Hi-Ho construction article published February 1941 issue Air Trails Ed Lidgard 1941 original Sparky dif fered Comets kit version its singlewheel retractable takeoff gear drooped tips stabilizer folding propeller MINI-ELECTRIC QUIET ANT START STEMSCHJrERIES [v32][b-1-10-1-10]]$2495EFC-5001B5 Props Charge Cord andLaw cost Quick Charttht Batteries Reqattns spacers etc4 D type hoonries FC-402 Ideal tar FLIGHT BATTERIES $3295B-62 HY-7t 2w 50 mA-Hr $ 995 attery St-5 SwitchB-63 HY70 3w 50 mA-fir 1295 tractieno B-33L HY42 3 e tOO mA-Hr B-34L HY42 4x itt mA-Hr B-13L IHY42 3w iBO mA-Hr rains1295 424w iBO mA-Hr 45 grams1595 Q40W5 ACfl ,flu . en1905 including all-important graph models used illustrate graph mostly designs Fifties Nostalgia era same laws physics applied 1940 earlier think Rubber models may best flown just bit stable direction 5%-l0% Gas models shown Anyway once understand article simple calculations needed find models location graph can establish safe CG posi tion remains perhaps find optimum CG field trials errors method does work article helps understand Scale model tiny stab must have CG forward 30%-of-wing-chord location fly success fully Civy Boy could fly CU aft wings trailing edge Returning Hi-Ho story Sal later told CG position gave him helpful model flew well Ed Lidgard wrote later telling impressed Sals tech nique finding optimum CU said Sal puts small bolt tail adds sub tracts washers to make small CU changes moves CU aft retrims model until performance gets worse instead better moves CU forward again until per formance suffers point just between two extremes best position Most us satisfied whatever CU have model flyable Sal beats us time RC folk will say large pitch trim change experience between power power Off can reduced moving CU aftbut too far gives model overly sensitive elevator movement will pay op timize CU location ease flying less pitch trim change because glide will improve may want CU bit ahead posi tion Free Flight will get somewhat bet ter control response too far forward will hurt glide increasing drag due Up trim model has have whether realize counter nose-heavy condition am looking two Hand-Launched Glider plans design used Ray Mathews FUBAR fame called FUGAN other kit Testors late Forties no other name Contest Hand-Launched Glider something like some what similar current Campbells Thermal Piglet HLU Ill appreciate leads and/or copies plans Ill make same available theyre ob tained Speaking Campbells Custom Kits has new catalog Out send him couple bucks get yours lists modern Old-Timer Nostalgia era kits good source Free Flight supplies timers winding hooks Zaic yearbooksgood stuff need Lee wife run business manufacture kits quality folks business address PO Box 5996 Lake Worth FL 33466-5996 Recent additions Campbells line would interest Old-Timer fliers Earl Stahls Gypsy Rubber cabin ship similar better-known Korda Wakefield SAM-legal Hand-Launched Glider called Vartanian also various kits formerly made Fresno Easy Built including 1939 Cana dian Wakefield should competitive Scientific Miss Worlds Fair likely competitive sure pretty attended club meeting SAM 56 Wichita KS gave little slide show photos took 1988 SAM Champs wellreceived presentation would willing try something like other clubs trans portation other costs can arranged SAM chapter Tahiti FF Indoor/Tenny Continued page 75 drooping puddle nose tail shifting models balance case Pennyplane braiding seems reduce mation knots hang up side fuselage prevent section motor unwinding So what about 0-rings photos shows both ends braided motor Note motor consists four strands Actually very long loop doubled back both ends rear hook Integrating 0-rings motor requires four hands doing fol lowing 1 Begin strip rubber about three inches longer four times length required motor weighing what fin ished motor needs weigh means 160 Model Aviation MINI POWER AT ITS BEST LIGHT WEIGHT K CHARGE MOTOPROPSPRO HY70$1495VI-ill 7 1 gear ratio trgage disengage Freeloclades HY-7t BB Wheeling 10 grams acladed soaps note meterConnecter sod Access HY-lOR -111R Same HY-70 wittSame VL-ltl Disconnects Slide BathTa oubstitate B H Y-70 H VL-192 HY-42 Includes HY42 Motor P1 Improved sersion HY-48 AppiCharBe Plag Cord Acci $1795 der 7 leads I3aick 1 Motor 30 size models sias 02 tuel esgine $2795 $3795 Remote Battery HolderVL Flight Battery aba ye add $300Field ban FF Old-Timers/Baker Continued page 74 Modelers Choice OMP EPOXIES High Quality Model Construction Jr Kwk Set 6 Minute5 02 $ 695 Kwik Set 6 Minute10 02 $1095 Giant Kwk Set 6 Minute16 02 $1495 Half FastlOMinute100Z$ 995 OMP AIRCRAFT INSTRUMENTS 80in3116114318l/2$ 179 40in3/4andoneinch$ 179 EASY OFF PULLER proper tool removing drive washeraLand flywheels $ 795 Gas Model Products 8773 Russet Dr Cincinnati OH 45239 dealer call 513-385-7398 order direct add $150 postage / / A-J INTERCEPTOR IRTF $750 $595 NO TE PLEASE ADS EL OH fOE POSTAGE * HANDLING FIRST THREE MODELS ODD TEN PERCENT OE PETHE TOE EACH ALOTTIONAL Aw0iJ AIRCRAFT COMPANY RO Box 68132 Portland OR 97268 see Dealer Add Dollar No 30a i/a Scale s59~ REIAHEE le s6~ U mI7U ml IIei
Edition: Model Aviation - 1989/07
Page Numbers: 74, 160
SIMPLE JIGS fuselage alignment subject some photos recent col umns reminded Ed Lidgard sent some photos quite ago Two Eds photos selected month show very genious effective use cardboard hold parts place future columns will show some photographs space permits Ed Lidgard known designer HiHo Eugene Sparky name few popular designs member US Wakefield team several times ability wind rubber motor breaking turns anybody else legendary Considering can imagine surprise phoned night said over Sal Taibis house Sal making Hi-Ho asked him center-of-gravity should couldnt remem ber knew flying well called held phone went out garage put plane together loaded motor found CG About 64% chord would say question him didnt put CG plans 1941 answer great dont know have talked several designers Old-Timer era put same question basic answer seems con sidered model unique therefore requir ing unique combination CG position gles incidence flying surfaces en gines seldom shown plans down side thrust can bet models flew once some Rubber models almost invariably need both down right thrust drawn thrust line parallel centerline fuselage Often incidence blocks chunks wood shim routinely put under leading edge wing before model would flyable never mention plans youd find admonition ar ticle adjust care something else equally helpful serious omission CG po sition Nothing has greater effect per formance Free Flight model location CG know longer tail moment arms larger stabs CG can farther aft performance improved hut far aft far enough far too far CG too far forward ship loopy needs too much downthrust may easy trim super stable low power higher power becomes just about impossi ble trim out So what its too far aft remember spectac ular Civy Boy huge thing about 1200 sq wing area maybe bellowing MCCoy 60 Strong men quaked children followed mothers shelter cars birds left county some cows went dry builder let thing loose went way pointed good Civy Boys wont straight up What relief mighty McCoy fell silent huge model hung moment suspended swapped ends came down like went up straight hit 10 ft launch point tribute builders accurate construction alignment considering velocity attained point CG too far aft some thing lost stability saw way de signer Civy Boy Paul Gilliam fly right aimed up about 600 angle went way going fast en gine cut flew transition like door Hand-Launched Glider speed climb awesome its day due part low incidence permit ted long tail moment very large over 50% wing area stab aft CG lo cated 100% wing chordor skating thin ice stability Forget ROG really sight see ROW rise-off-waterEd day Nats ran full length water tank tails up digress talking about CG location helpful significant article ever pub lished opinion Tail Volume CG Location Bill Bogart Bud Rhodes published Model Airplane News January 1959 say may have misplaced sue Well probably best thing to look up copy 1959/61 Model Aer onautic Yearbook Zaic can buy book AMAs Supply Service Department FAL Model Supply Hannans Hangar Frank Zaic himself PO Box 135 Northridge CA 91328 MAN article con densed Yearbook data Continued page 160 Ed Lidgards recent photos fuselage jig used constructing Rubber model Look closely see centerline pencilled 2 x 4 base Various cardboard clamps its own centerline inscribed attached base bulletin board pins old mas ters careful builders also Indoor fliersa discipline construction jigs have always frequent use 74 Model Aviation Free Flight Old-Timers Bill Baker 1902 Peter Pan Norman OK 73072 David Rosenbergs shot Ed Lidgard 1940 Canadian Nationals Model Hi-Ho construction article published February 1941 issue Air Trails Ed Lidgard 1941 original Sparky dif fered Comets kit version its singlewheel retractable takeoff gear drooped tips stabilizer folding propeller MINI-ELECTRIC QUIET ANT START STEMSCHJrERIES [v32][b-1-10-1-10]]$2495EFC-5001B5 Props Charge Cord andLaw cost Quick Charttht Batteries Reqattns spacers etc4 D type hoonries FC-402 Ideal tar FLIGHT BATTERIES $3295B-62 HY-7t 2w 50 mA-Hr $ 995 attery St-5 SwitchB-63 HY70 3w 50 mA-fir 1295 tractieno B-33L HY42 3 e tOO mA-Hr B-34L HY42 4x itt mA-Hr B-13L IHY42 3w iBO mA-Hr rains1295 424w iBO mA-Hr 45 grams1595 Q40W5 ACfl ,flu . en1905 including all-important graph models used illustrate graph mostly designs Fifties Nostalgia era same laws physics applied 1940 earlier think Rubber models may best flown just bit stable direction 5%-l0% Gas models shown Anyway once understand article simple calculations needed find models location graph can establish safe CG posi tion remains perhaps find optimum CG field trials errors method does work article helps understand Scale model tiny stab must have CG forward 30%-of-wing-chord location fly success fully Civy Boy could fly CU aft wings trailing edge Returning Hi-Ho story Sal later told CG position gave him helpful model flew well Ed Lidgard wrote later telling impressed Sals tech nique finding optimum CU said Sal puts small bolt tail adds sub tracts washers to make small CU changes moves CU aft retrims model until performance gets worse instead better moves CU forward again until per formance suffers point just between two extremes best position Most us satisfied whatever CU have model flyable Sal beats us time RC folk will say large pitch trim change experience between power power Off can reduced moving CU aftbut too far gives model overly sensitive elevator movement will pay op timize CU location ease flying less pitch trim change because glide will improve may want CU bit ahead posi tion Free Flight will get somewhat bet ter control response too far forward will hurt glide increasing drag due Up trim model has have whether realize counter nose-heavy condition am looking two Hand-Launched Glider plans design used Ray Mathews FUBAR fame called FUGAN other kit Testors late Forties no other name Contest Hand-Launched Glider something like some what similar current Campbells Thermal Piglet HLU Ill appreciate leads and/or copies plans Ill make same available theyre ob tained Speaking Campbells Custom Kits has new catalog Out send him couple bucks get yours lists modern Old-Timer Nostalgia era kits good source Free Flight supplies timers winding hooks Zaic yearbooksgood stuff need Lee wife run business manufacture kits quality folks business address PO Box 5996 Lake Worth FL 33466-5996 Recent additions Campbells line would interest Old-Timer fliers Earl Stahls Gypsy Rubber cabin ship similar better-known Korda Wakefield SAM-legal Hand-Launched Glider called Vartanian also various kits formerly made Fresno Easy Built including 1939 Cana dian Wakefield should competitive Scientific Miss Worlds Fair likely competitive sure pretty attended club meeting SAM 56 Wichita KS gave little slide show photos took 1988 SAM Champs wellreceived presentation would willing try something like other clubs trans portation other costs can arranged SAM chapter Tahiti FF Indoor/Tenny Continued page 75 drooping puddle nose tail shifting models balance case Pennyplane braiding seems reduce mation knots hang up side fuselage prevent section motor unwinding So what about 0-rings photos shows both ends braided motor Note motor consists four strands Actually very long loop doubled back both ends rear hook Integrating 0-rings motor requires four hands doing fol lowing 1 Begin strip rubber about three inches longer four times length required motor weighing what fin ished motor needs weigh means 160 Model Aviation MINI POWER AT ITS BEST LIGHT WEIGHT K CHARGE MOTOPROPSPRO HY70$1495VI-ill 7 1 gear ratio trgage disengage Freeloclades HY-7t BB Wheeling 10 grams acladed soaps note meterConnecter sod Access HY-lOR -111R Same HY-70 wittSame VL-ltl Disconnects Slide BathTa oubstitate B H Y-70 H VL-192 HY-42 Includes HY42 Motor P1 Improved sersion HY-48 AppiCharBe Plag Cord Acci $1795 der 7 leads I3aick 1 Motor 30 size models sias 02 tuel esgine $2795 $3795 Remote Battery HolderVL Flight Battery aba ye add $300Field ban FF Old-Timers/Baker Continued page 74 Modelers Choice OMP EPOXIES High Quality Model Construction Jr Kwk Set 6 Minute5 02 $ 695 Kwik Set 6 Minute10 02 $1095 Giant Kwk Set 6 Minute16 02 $1495 Half FastlOMinute100Z$ 995 OMP AIRCRAFT INSTRUMENTS 80in3116114318l/2$ 179 40in3/4andoneinch$ 179 EASY OFF PULLER proper tool removing drive washeraLand flywheels $ 795 Gas Model Products 8773 Russet Dr Cincinnati OH 45239 dealer call 513-385-7398 order direct add $150 postage / / A-J INTERCEPTOR IRTF $750 $595 NO TE PLEASE ADS EL OH fOE POSTAGE * HANDLING FIRST THREE MODELS ODD TEN PERCENT OE PETHE TOE EACH ALOTTIONAL Aw0iJ AIRCRAFT COMPANY RO Box 68132 Portland OR 97268 see Dealer Add Dollar No 30a i/a Scale s59~ REIAHEE le s6~ U mI7U ml IIei