George M Aldrich Up Around 12822 Tarrytown San Antonio TX 78233 MY FIRST engine Super Atom found under Christmas tree 1941 fifth grade class sold magazine subscriptions throughout school year earn points toward multitude prizes Alas come up equivalent $175 short choice between Atom Brownie 29 waning Depression years $175 could just well have $1750 As mothers will arranged principal school make up difference got little Atom run built American Ace 33 10 years old small town never flew war years over finally got first successful flights Spearhead Jr 1946 Years later Old-Timer movement evolved SAM Society Antique Modelers formed first model thought Spearhead Jr disappointing find out design legal Old-Timer since wasnt kitted until after cutoff date December 31 1942 years passed number designs put approved list after designers came forward substantiated model built flown before date mind set out find Jerry Stoloff designer Spearhead took almost year found Jerry Florida Jerry able prove its legality both Spearheads Jr Sr plus design called Yehudi no seemed know existed now legal SAM events great pleasure meet visit Jerry Stoloff Jean Nevada 1991 SAM Champs past October see him inducted SAM Hall Fame great Dill Skipper introduced Akro-Bat 1947 guaranteed fly inverted first such kit market Just look what Bill started Stunt fliers owe Art Adamisin vote thanks huge contribution sport left Bill Hopkins about launch Big Arts Joker nt Vintage Stunt Championships Ill R Don Burgesss Birmingham England Concours dEleganceciass Tipsy Master Models kit Heres model responsible tor Stunt know today Its Mike Pratts faithful rendition Bob Palmers polywog-airfoil Veco Chief Bob also built first tricycle-geared Nationals winner nose wheel brake operated full-down elevator Woisley Photo deeply involved Free Flight also 1946 saw first CL contest first loop Boy hooked Laredo Texas Id hitched ride older guysthe ones 19 20 years old Now older guy goat days goat Free Flight model converted UControl CL La Jimmy Walkers Fireball As 14 year old stood awe guy flipped prop Contestor D6OR-powered goat took off did real ioop really bitten just too older guy turned out Russell Snyder went win Senior Stunt 1946 Nationals Russ went off school Northrop 1946 1949 Olathe Kansas Inglewood Flightmasters national champion club year 1949 Nationals first naturally gravitated toward Russ wound up pitting otherhe taking third Senior Stunt little no practice winner year Senior Don Still As Ive said before Don would have winner Walker Trophy Novelty Stunt points averaged Precision scores Both fine pioneer Stunt fliers flew own designs under present method recognition legal OT Stunt events Surely would order PAMPA organization establish design committee like SAM order least consider documented designs admittance OT Stunt list never cease amazed phone calls get since Mike Keville started Vintage Stunt Champs Last night answered voice other end sez Walt Pyron last time Id seen Walt 1953 Willow Grove Pennsylvaniaor maybe Chicago 54 rate seems Walt picked up September issue Model Aviation read copy about old Nationals VSC event Tucson Well like others us hes bitten again plans Tucson March 21st 22nd VSC IV Hearing fliers true Golden Age CL real kick emerges brings up things Ive forgotten adds authenticity Stunt history thing Walt very certain about time span during Bob Elliot first campaigned Black Tiger later become Berkeley kit P-40 Bob March 1992 59 n Arizona have tabulous hying site neyli nost tue rcn ors 1980 spearhead Junior Jerry toIotT aesign wasnt iegai Tor MIU uveilts wasnt kitted until after cutoff date SAM Hall Famer Stoloff recently fixed Continued page 142 aspiring Stunt fliers young old Heres man started Bob bought Akro-Bats saw panic Palmer shows first Stunt ship flaps ular photo Bill Skipper handle Go-Devil Jr powered McCoy 19RV wouldnt Bill Skipper photo Nationals time 1955 new Nobler George taking summer courses University Texas won year Clue It wasnt guy photo Real Stuff Dave ____________Performance Specialties True AAC & ABC Piston/Cylinder Assemblies Serious Horsepower AAC Nelson 40 FAI Formula OS Hanno Special 05 61 SF/RE YS 61R 1 Q-50 Available Following Engines ABC Nelson 40 FAI Formula 1 Q-500 05 32 05 4OVF VRP OS 46SF OS 61SF/RE OS 61VE 0S61 SEN-H REN-H 0561 FSR 05 91 VRDF ST X-40 Rossi 40 YS 45 YS 60 FR/ES YS61 R/SYS 120 Complete Parts & Service OS ST YS & bra Performance Specialties ox 3146 nerville NV 89410 Phone 702-265-7523 FAX 702-265-7522 ViS4I Send $200 1992 Catalog challenge may find yourself flying alongfeet gracelessly scraping random patterns sand So next time its too windy fly plane field taken over special event another dont frustrated Have ball Go fly kite Robins/Wilson Continued page 56 ovations throughout United States England movie staffing Dennis Morgan especially inspirational children eight-to-12 age group Morgan pushed Hollywood stage prop Curtiss P-40 Warhawk 35-degree dive slightly lifting right wing deflection shot gave chase another Japanese Zero sound theater burst machine gun fire six 50caliber weapons enemy plane went down impressionable young boys mentally wore General Scotts three Distinguished Flying Crosses two Silver Stars five Air Medals bib D overalls T-shirts poured out Saturday matin& onto Main Street USA Not few would go fight future air battles defense freedom General Robert L Scott Jr retired US Air Force 1957 Museum Aviation supported voluntary contributions Scott serves its ongoing Campaign Chairman museum boasts first-rate display Scotts 23rd Fighter Group memorabilia God Co-pilot shown museum theater photographs film display first edition responding advertisers mention read about Model Aviation Scotts book presented him mother can also seen enthusiasm staff volunteers nationally prominent depository historical aircraft memorabilia unmistakable Theyre both preserve history tradition Robins Air Force Base US Air Force make visitors feel welcome Anyone attending can expect cordial southern-style greeting followed fascinating educational experience round/Aldrich Continued page 59 built competed locally design 1952 didnt remember since Georgia gang didnt make 1952 Nationals California conversation last week Bill ** 4620 CRANDALL-I ANF$VILLE RD CORYDON INDIANA 47112 ** ____________________________________ __________________________ Large selection Remote Control Model Airplanes professional LISTED BELOW Business since 1973 ES SUBJECT TO CHANGE WITHOUT NOTICE IS JUST FEW OF THE MFGWE STOCK HOURS MONDAYTHRUTHURSpAVOAAA PAA D7nAVOAAAPM A-i USTO JIGCLOSED SATURDAY& AMBR OlD ARCO RUBBERBANDS BRiDI DAVEYS SYSTEMS cOVERiTE DEvcON DREMEL DU-BRO DY NA Fl LITE SONIc-TRONIcS STERLING SULLIVAN TOP FLiTE VS ENGINES LA Ni ER MILLER NORTHEAST ZINGER PROPS complete listing etcplease sends stamped self-address enve lope DEALERS WANTED Limited Quantity STAFFORD SCALE 8-24$300 ENGINES 4 19-25 WINGSPAN 9Oinebes FKKITSIGkkumI FOX FUTABA GOLDBERG GAS MODEL PROD HALLCO HOBBYPOXY HOT STUFF K & B MFG Si G SAITO 142 Model Aviation 0 STAFFORD AIRCOUPE $9995 PLEASE CALL FOR SPECIALS OF THE MONTH Wisniewski K&B Mfg use K&B 325 35 engines may find interesting call inquire about parts Free Flight versions no longer production particular curious about crankshafts breaking Id number shop recently Bill related has run engines 35000 rpm hour no problems told seen breakage 22000 24000 rpm area certain harmonic node rpm range seems be culprit what its worth Marvin Mace fellow club members top competitor uses new 78 x 4 D-l APC prop has no shaft breakage prop holds revs around 21500 ground yet produces better thrust Now K&B has about recovered its move getting back production perhaps folks will consider making improved version great series engines Some time ago mentioned use Coleman lantern fuel good substitute gasoline engines seems always true Bert Striegler senior engineer now retired major oil company informs type fuel closer charcoal lighter fluid gasoline problem recommending certain brand gasolines blended differently various climates What use Texas may work worth Maine starters Ive found 92 octane unleaded gasoline works well climate During summer 1990 Jim Reynolds tried number ignition fuel mixesincluding gasohol 10% ethane castor oil various synthetics old original 70-weight SAE petroleum lube gasohol worked well stopped using because began etch plastic tanks O&Rs Super Cykes etc Some engines O&Rs particular take well synthetics castor oil have also seen engines have run popular synthetic castor oil pistons 004 out round cylinders warped 007 out grooves wrist pins can hang thumb nail have infinite supply good old ignition engines some synthetics will give rpm treasure ignition engines take heed greatest Sal Taibi still uses 70-weight oil mix Ohlssons 21 standard fuel 25% 70-weight 5% Mobil II turbine lube 70% 92 octane unleaded Mobil II lube available airport services jets Turbine lube also made same specification Shell Exxon others Stunt flier aspiring young wrote long ago asking make engines break two-cycle want As turned out answer took lot longer thought would About time getting needle setting realized engine set break two-cycle because because wanted original Nobler 48 oz second-model Fox 35 up front would have marginal two-cycle break illustrate point replica built VSC-I 1989 has OS 35S up front Everything close original could make including lead-out positions During first flight dismayed find model flying such yaw could see whole outboard wheel gear behind inboard OS has much power both lead-outs have moved forward over inch SST tongue muffler installed doesnt have break two-cycle Some may find interesting know dragged out pieces original old bird found quite different either Model Airplane News plan kit though drew plans both versions original either time late summer 1954 left March 1992 143 New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price Just think dont have send Dollars out country obtain QuaUty expect Priced just few Dollars cheapies below quality competition American Made K6 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 Temco Aircraft gone back school Study habits caine hard after two-year hiatus started suffer Nationals itch about June 1955 though new ship California out question particular Nationals probably set rules lasted year have no idea came pass spot landing written rules lasted year 1956 removed anyone recalls came pass would please share us great Bob Palmer never pass up opportunity Bob built first tricycle-geared Nationals winnerwith nose wheel brake operated full down elevator would paint slick Thunderbird deck roll around pop full down right spot Im sure what points Bob beat Jose Sadurni 11 points Clarence Lee third 21 points John Lenderman came fourth 3313 Bill Cummings won Senior year flying Nobler know Nobler carved cowling him 1954 Bill built still flying 1958 Bill won 141 points over Larry Phillips 36 1 points over James Ebenger third young man named Walton Pyron came fifthonly 344 points behind Walt 53 now great hear him hope brings Blackhawk Tucson Little Eddie May Jr came way North Carolina win Junior flying Fox 35-powered Thunderbird beat Rich Renwald 7 points Don Stills proteges Cliff Woodruff Beaumont Texas third flying Stuka kit Fox 29 Probably no else has done much research history Stunt event Wynn Paul sincere thanks Wynn forwarding copies data spent years accumulating great deal mail expresses little consternation over engines available today select given event class enough interest perhaps could elaborate timing affects power its intended use Contrary what seem believe Schnuerle-ported design can deliver just high speed racing performance Listed below details joining organizations will assist interested vintage modeling help locate sources related supplies parts old engines Model Engine Collectors Association MECA 3007 Travis West Lake LA 70669 $15/yr US Canada other $22 US dollars Precision Aerobatics Model Pilots Association PAMPA 1019 Creek Trail Anniston AL 36206 $15/yr US Canada $20 others $25 US dollars Society Antique Modelers SAM Bob Dodds 209 Summerside Ln Encinitas CA 92024 $15/yr US other countries life $150 write want reply please enclose SASE will always answer also accept phone 3 1/5 scale ~jirneOssi __________All Wood Beech D-18/C-45 114 Span twin 035s orG38s $40 Compact Giant 1/7th Scale P-47 Thunderbolt 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 ENO RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 144 Model Aviation THE AMERICAN MADE RJL K61 metal multi mix carburetor 0-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened Steel Crankshaft Aerospace Quality Dual Ball BearingsInvestment Cast Crankcase B-25 Mitchell101 $3800 Ju-87B Stuka100 .3000 DC-3/C-47140 4200 F4U Corsair93 . 3000 PT-17 Stearman 77 2700 P-40 Warhawk94 . 3000 AT-6 Texan101 . 3000 F8F Bearcat86 . 3000 A6M5 Zero91 .3000 Fokker Dr-I63 2700 Semi Scale Taube882500 calls please dont call writing will suffice have business run address 12822 Tarryton San Antonio TX 78233 Tel 512 656-2021 D Vertical TaiI/McCombs Continued page 63 effects mild violent Dutch roll easily produced observed experimentally simple stick-fuselage Rubber model having moderate wing dihedralabout 9O First trim fly well between successive flights cut away tail area small amountsabout 5% existing areaand watch Dutch roll set become worse finally become violent causing crash can also seen using simple all-balsa glider smallest size tail no Dutch roll will larger model having tractor up-front prop no prop glider smaller pusher rear prop reason spinning prop acts like small vertical tail up front cancels out some tails effect requiring increase size tail rear adds tail area tail can smaller nonexistent spinning prop also acts like small horizontal tail larger prop greater effect largest Rubber models vertical tail quite small enough cause noticeable Dutch roll can still small enough cause two other minor troubles model might wander around flight rather staying groove might found small side thrust vertical tail incidence adjustments very effective controlling turn flight either case small increase vertical tail area will eliminate trouble Controllability during flight no concern FF models piloted airplanes Thats have relatively large tails tail must large enough allow good turns ailerons rudder properly coordinated good sideslipping ability landing crosswinds short fields ability maintain heading high power suddenly applied during low-speed landing flight good control taxiing achieve above rudder portion Figure 2a usually 30% 60% tail area can deflected about 30350 either side low-speed taxiing control high-speed flight large rudder deflections needed early-day airplanes such WW Nieuport 11 12 17 Morane-Saulnier L Bristol Scout D Fokker E-III Triplane Pfalz E-l entire tail deflected required much aerodynamic balance area forward hinge line Figure 2c keep pilots effort reasonably small Such tails smaller fin rudder used piloted airplanes tail large during its low-speed flight airplane spirally unstable improves speed increases ie lift coefficient decreases airplane becomes stable during its high-speed flight generally no problem since pilot can correct motion except flying blind FF5 models such airplanes however spiral instability unacceptable must eliminated described later tail will cause spiral instability related troubles flight understand what meant spiral instability suppose FF Duration model generous dihedral power trimmed fly very steeply upward either straight flight spiraling climb spirally unstable will always roll off straight flight undesired spiral may still upward less steeply desired As result less altitude duration achieved trimmed steep spirally upward flight will always roll off undesired shallower spiral less steeply upward again less altitude Continued page 146 March 1992 145 Spiral instability too large vertical
Edition: Model Aviation - 1992/03
Page Numbers: 60, 61, 144, 145, 146, 147
George M Aldrich Up Around 12822 Tarrytown San Antonio TX 78233 MY FIRST engine Super Atom found under Christmas tree 1941 fifth grade class sold magazine subscriptions throughout school year earn points toward multitude prizes Alas come up equivalent $175 short choice between Atom Brownie 29 waning Depression years $175 could just well have $1750 As mothers will arranged principal school make up difference got little Atom run built American Ace 33 10 years old small town never flew war years over finally got first successful flights Spearhead Jr 1946 Years later Old-Timer movement evolved SAM Society Antique Modelers formed first model thought Spearhead Jr disappointing find out design legal Old-Timer since wasnt kitted until after cutoff date December 31 1942 years passed number designs put approved list after designers came forward substantiated model built flown before date mind set out find Jerry Stoloff designer Spearhead took almost year found Jerry Florida Jerry able prove its legality both Spearheads Jr Sr plus design called Yehudi no seemed know existed now legal SAM events great pleasure meet visit Jerry Stoloff Jean Nevada 1991 SAM Champs past October see him inducted SAM Hall Fame great Dill Skipper introduced Akro-Bat 1947 guaranteed fly inverted first such kit market Just look what Bill started Stunt fliers owe Art Adamisin vote thanks huge contribution sport left Bill Hopkins about launch Big Arts Joker nt Vintage Stunt Championships Ill R Don Burgesss Birmingham England Concours dEleganceciass Tipsy Master Models kit Heres model responsible tor Stunt know today Its Mike Pratts faithful rendition Bob Palmers polywog-airfoil Veco Chief Bob also built first tricycle-geared Nationals winner nose wheel brake operated full-down elevator Woisley Photo deeply involved Free Flight also 1946 saw first CL contest first loop Boy hooked Laredo Texas Id hitched ride older guysthe ones 19 20 years old Now older guy goat days goat Free Flight model converted UControl CL La Jimmy Walkers Fireball As 14 year old stood awe guy flipped prop Contestor D6OR-powered goat took off did real ioop really bitten just too older guy turned out Russell Snyder went win Senior Stunt 1946 Nationals Russ went off school Northrop 1946 1949 Olathe Kansas Inglewood Flightmasters national champion club year 1949 Nationals first naturally gravitated toward Russ wound up pitting otherhe taking third Senior Stunt little no practice winner year Senior Don Still As Ive said before Don would have winner Walker Trophy Novelty Stunt points averaged Precision scores Both fine pioneer Stunt fliers flew own designs under present method recognition legal OT Stunt events Surely would order PAMPA organization establish design committee like SAM order least consider documented designs admittance OT Stunt list never cease amazed phone calls get since Mike Keville started Vintage Stunt Champs Last night answered voice other end sez Walt Pyron last time Id seen Walt 1953 Willow Grove Pennsylvaniaor maybe Chicago 54 rate seems Walt picked up September issue Model Aviation read copy about old Nationals VSC event Tucson Well like others us hes bitten again plans Tucson March 21st 22nd VSC IV Hearing fliers true Golden Age CL real kick emerges brings up things Ive forgotten adds authenticity Stunt history thing Walt very certain about time span during Bob Elliot first campaigned Black Tiger later become Berkeley kit P-40 Bob March 1992 59 n Arizona have tabulous hying site neyli nost tue rcn ors 1980 spearhead Junior Jerry toIotT aesign wasnt iegai Tor MIU uveilts wasnt kitted until after cutoff date SAM Hall Famer Stoloff recently fixed Continued page 142 aspiring Stunt fliers young old Heres man started Bob bought Akro-Bats saw panic Palmer shows first Stunt ship flaps ular photo Bill Skipper handle Go-Devil Jr powered McCoy 19RV wouldnt Bill Skipper photo Nationals time 1955 new Nobler George taking summer courses University Texas won year Clue It wasnt guy photo Real Stuff Dave ____________Performance Specialties True AAC & ABC Piston/Cylinder Assemblies Serious Horsepower AAC Nelson 40 FAI Formula OS Hanno Special 05 61 SF/RE YS 61R 1 Q-50 Available Following Engines ABC Nelson 40 FAI Formula 1 Q-500 05 32 05 4OVF VRP OS 46SF OS 61SF/RE OS 61VE 0S61 SEN-H REN-H 0561 FSR 05 91 VRDF ST X-40 Rossi 40 YS 45 YS 60 FR/ES YS61 R/SYS 120 Complete Parts & Service OS ST YS & bra Performance Specialties ox 3146 nerville NV 89410 Phone 702-265-7523 FAX 702-265-7522 ViS4I Send $200 1992 Catalog challenge may find yourself flying alongfeet gracelessly scraping random patterns sand So next time its too windy fly plane field taken over special event another dont frustrated Have ball Go fly kite Robins/Wilson Continued page 56 ovations throughout United States England movie staffing Dennis Morgan especially inspirational children eight-to-12 age group Morgan pushed Hollywood stage prop Curtiss P-40 Warhawk 35-degree dive slightly lifting right wing deflection shot gave chase another Japanese Zero sound theater burst machine gun fire six 50caliber weapons enemy plane went down impressionable young boys mentally wore General Scotts three Distinguished Flying Crosses two Silver Stars five Air Medals bib D overalls T-shirts poured out Saturday matin& onto Main Street USA Not few would go fight future air battles defense freedom General Robert L Scott Jr retired US Air Force 1957 Museum Aviation supported voluntary contributions Scott serves its ongoing Campaign Chairman museum boasts first-rate display Scotts 23rd Fighter Group memorabilia God Co-pilot shown museum theater photographs film display first edition responding advertisers mention read about Model Aviation Scotts book presented him mother can also seen enthusiasm staff volunteers nationally prominent depository historical aircraft memorabilia unmistakable Theyre both preserve history tradition Robins Air Force Base US Air Force make visitors feel welcome Anyone attending can expect cordial southern-style greeting followed fascinating educational experience round/Aldrich Continued page 59 built competed locally design 1952 didnt remember since Georgia gang didnt make 1952 Nationals California conversation last week Bill ** 4620 CRANDALL-I ANF$VILLE RD CORYDON INDIANA 47112 ** ____________________________________ __________________________ Large selection Remote Control Model Airplanes professional LISTED BELOW Business since 1973 ES SUBJECT TO CHANGE WITHOUT NOTICE IS JUST FEW OF THE MFGWE STOCK HOURS MONDAYTHRUTHURSpAVOAAA PAA D7nAVOAAAPM A-i USTO JIGCLOSED SATURDAY& AMBR OlD ARCO RUBBERBANDS BRiDI DAVEYS SYSTEMS cOVERiTE DEvcON DREMEL DU-BRO DY NA Fl LITE SONIc-TRONIcS STERLING SULLIVAN TOP FLiTE VS ENGINES LA Ni ER MILLER NORTHEAST ZINGER PROPS complete listing etcplease sends stamped self-address enve lope DEALERS WANTED Limited Quantity STAFFORD SCALE 8-24$300 ENGINES 4 19-25 WINGSPAN 9Oinebes FKKITSIGkkumI FOX FUTABA GOLDBERG GAS MODEL PROD HALLCO HOBBYPOXY HOT STUFF K & B MFG Si G SAITO 142 Model Aviation 0 STAFFORD AIRCOUPE $9995 PLEASE CALL FOR SPECIALS OF THE MONTH Wisniewski K&B Mfg use K&B 325 35 engines may find interesting call inquire about parts Free Flight versions no longer production particular curious about crankshafts breaking Id number shop recently Bill related has run engines 35000 rpm hour no problems told seen breakage 22000 24000 rpm area certain harmonic node rpm range seems be culprit what its worth Marvin Mace fellow club members top competitor uses new 78 x 4 D-l APC prop has no shaft breakage prop holds revs around 21500 ground yet produces better thrust Now K&B has about recovered its move getting back production perhaps folks will consider making improved version great series engines Some time ago mentioned use Coleman lantern fuel good substitute gasoline engines seems always true Bert Striegler senior engineer now retired major oil company informs type fuel closer charcoal lighter fluid gasoline problem recommending certain brand gasolines blended differently various climates What use Texas may work worth Maine starters Ive found 92 octane unleaded gasoline works well climate During summer 1990 Jim Reynolds tried number ignition fuel mixesincluding gasohol 10% ethane castor oil various synthetics old original 70-weight SAE petroleum lube gasohol worked well stopped using because began etch plastic tanks O&Rs Super Cykes etc Some engines O&Rs particular take well synthetics castor oil have also seen engines have run popular synthetic castor oil pistons 004 out round cylinders warped 007 out grooves wrist pins can hang thumb nail have infinite supply good old ignition engines some synthetics will give rpm treasure ignition engines take heed greatest Sal Taibi still uses 70-weight oil mix Ohlssons 21 standard fuel 25% 70-weight 5% Mobil II turbine lube 70% 92 octane unleaded Mobil II lube available airport services jets Turbine lube also made same specification Shell Exxon others Stunt flier aspiring young wrote long ago asking make engines break two-cycle want As turned out answer took lot longer thought would About time getting needle setting realized engine set break two-cycle because because wanted original Nobler 48 oz second-model Fox 35 up front would have marginal two-cycle break illustrate point replica built VSC-I 1989 has OS 35S up front Everything close original could make including lead-out positions During first flight dismayed find model flying such yaw could see whole outboard wheel gear behind inboard OS has much power both lead-outs have moved forward over inch SST tongue muffler installed doesnt have break two-cycle Some may find interesting know dragged out pieces original old bird found quite different either Model Airplane News plan kit though drew plans both versions original either time late summer 1954 left March 1992 143 New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price Just think dont have send Dollars out country obtain QuaUty expect Priced just few Dollars cheapies below quality competition American Made K6 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 Temco Aircraft gone back school Study habits caine hard after two-year hiatus started suffer Nationals itch about June 1955 though new ship California out question particular Nationals probably set rules lasted year have no idea came pass spot landing written rules lasted year 1956 removed anyone recalls came pass would please share us great Bob Palmer never pass up opportunity Bob built first tricycle-geared Nationals winnerwith nose wheel brake operated full down elevator would paint slick Thunderbird deck roll around pop full down right spot Im sure what points Bob beat Jose Sadurni 11 points Clarence Lee third 21 points John Lenderman came fourth 3313 Bill Cummings won Senior year flying Nobler know Nobler carved cowling him 1954 Bill built still flying 1958 Bill won 141 points over Larry Phillips 36 1 points over James Ebenger third young man named Walton Pyron came fifthonly 344 points behind Walt 53 now great hear him hope brings Blackhawk Tucson Little Eddie May Jr came way North Carolina win Junior flying Fox 35-powered Thunderbird beat Rich Renwald 7 points Don Stills proteges Cliff Woodruff Beaumont Texas third flying Stuka kit Fox 29 Probably no else has done much research history Stunt event Wynn Paul sincere thanks Wynn forwarding copies data spent years accumulating great deal mail expresses little consternation over engines available today select given event class enough interest perhaps could elaborate timing affects power its intended use Contrary what seem believe Schnuerle-ported design can deliver just high speed racing performance Listed below details joining organizations will assist interested vintage modeling help locate sources related supplies parts old engines Model Engine Collectors Association MECA 3007 Travis West Lake LA 70669 $15/yr US Canada other $22 US dollars Precision Aerobatics Model Pilots Association PAMPA 1019 Creek Trail Anniston AL 36206 $15/yr US Canada $20 others $25 US dollars Society Antique Modelers SAM Bob Dodds 209 Summerside Ln Encinitas CA 92024 $15/yr US other countries life $150 write want reply please enclose SASE will always answer also accept phone 3 1/5 scale ~jirneOssi __________All Wood Beech D-18/C-45 114 Span twin 035s orG38s $40 Compact Giant 1/7th Scale P-47 Thunderbolt 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 ENO RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 144 Model Aviation THE AMERICAN MADE RJL K61 metal multi mix carburetor 0-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened Steel Crankshaft Aerospace Quality Dual Ball BearingsInvestment Cast Crankcase B-25 Mitchell101 $3800 Ju-87B Stuka100 .3000 DC-3/C-47140 4200 F4U Corsair93 . 3000 PT-17 Stearman 77 2700 P-40 Warhawk94 . 3000 AT-6 Texan101 . 3000 F8F Bearcat86 . 3000 A6M5 Zero91 .3000 Fokker Dr-I63 2700 Semi Scale Taube882500 calls please dont call writing will suffice have business run address 12822 Tarryton San Antonio TX 78233 Tel 512 656-2021 D Vertical TaiI/McCombs Continued page 63 effects mild violent Dutch roll easily produced observed experimentally simple stick-fuselage Rubber model having moderate wing dihedralabout 9O First trim fly well between successive flights cut away tail area small amountsabout 5% existing areaand watch Dutch roll set become worse finally become violent causing crash can also seen using simple all-balsa glider smallest size tail no Dutch roll will larger model having tractor up-front prop no prop glider smaller pusher rear prop reason spinning prop acts like small vertical tail up front cancels out some tails effect requiring increase size tail rear adds tail area tail can smaller nonexistent spinning prop also acts like small horizontal tail larger prop greater effect largest Rubber models vertical tail quite small enough cause noticeable Dutch roll can still small enough cause two other minor troubles model might wander around flight rather staying groove might found small side thrust vertical tail incidence adjustments very effective controlling turn flight either case small increase vertical tail area will eliminate trouble Controllability during flight no concern FF models piloted airplanes Thats have relatively large tails tail must large enough allow good turns ailerons rudder properly coordinated good sideslipping ability landing crosswinds short fields ability maintain heading high power suddenly applied during low-speed landing flight good control taxiing achieve above rudder portion Figure 2a usually 30% 60% tail area can deflected about 30350 either side low-speed taxiing control high-speed flight large rudder deflections needed early-day airplanes such WW Nieuport 11 12 17 Morane-Saulnier L Bristol Scout D Fokker E-III Triplane Pfalz E-l entire tail deflected required much aerodynamic balance area forward hinge line Figure 2c keep pilots effort reasonably small Such tails smaller fin rudder used piloted airplanes tail large during its low-speed flight airplane spirally unstable improves speed increases ie lift coefficient decreases airplane becomes stable during its high-speed flight generally no problem since pilot can correct motion except flying blind FF5 models such airplanes however spiral instability unacceptable must eliminated described later tail will cause spiral instability related troubles flight understand what meant spiral instability suppose FF Duration model generous dihedral power trimmed fly very steeply upward either straight flight spiraling climb spirally unstable will always roll off straight flight undesired spiral may still upward less steeply desired As result less altitude duration achieved trimmed steep spirally upward flight will always roll off undesired shallower spiral less steeply upward again less altitude Continued page 146 March 1992 145 Spiral instability too large vertical
Edition: Model Aviation - 1992/03
Page Numbers: 60, 61, 144, 145, 146, 147
George M Aldrich Up Around 12822 Tarrytown San Antonio TX 78233 MY FIRST engine Super Atom found under Christmas tree 1941 fifth grade class sold magazine subscriptions throughout school year earn points toward multitude prizes Alas come up equivalent $175 short choice between Atom Brownie 29 waning Depression years $175 could just well have $1750 As mothers will arranged principal school make up difference got little Atom run built American Ace 33 10 years old small town never flew war years over finally got first successful flights Spearhead Jr 1946 Years later Old-Timer movement evolved SAM Society Antique Modelers formed first model thought Spearhead Jr disappointing find out design legal Old-Timer since wasnt kitted until after cutoff date December 31 1942 years passed number designs put approved list after designers came forward substantiated model built flown before date mind set out find Jerry Stoloff designer Spearhead took almost year found Jerry Florida Jerry able prove its legality both Spearheads Jr Sr plus design called Yehudi no seemed know existed now legal SAM events great pleasure meet visit Jerry Stoloff Jean Nevada 1991 SAM Champs past October see him inducted SAM Hall Fame great Dill Skipper introduced Akro-Bat 1947 guaranteed fly inverted first such kit market Just look what Bill started Stunt fliers owe Art Adamisin vote thanks huge contribution sport left Bill Hopkins about launch Big Arts Joker nt Vintage Stunt Championships Ill R Don Burgesss Birmingham England Concours dEleganceciass Tipsy Master Models kit Heres model responsible tor Stunt know today Its Mike Pratts faithful rendition Bob Palmers polywog-airfoil Veco Chief Bob also built first tricycle-geared Nationals winner nose wheel brake operated full-down elevator Woisley Photo deeply involved Free Flight also 1946 saw first CL contest first loop Boy hooked Laredo Texas Id hitched ride older guysthe ones 19 20 years old Now older guy goat days goat Free Flight model converted UControl CL La Jimmy Walkers Fireball As 14 year old stood awe guy flipped prop Contestor D6OR-powered goat took off did real ioop really bitten just too older guy turned out Russell Snyder went win Senior Stunt 1946 Nationals Russ went off school Northrop 1946 1949 Olathe Kansas Inglewood Flightmasters national champion club year 1949 Nationals first naturally gravitated toward Russ wound up pitting otherhe taking third Senior Stunt little no practice winner year Senior Don Still As Ive said before Don would have winner Walker Trophy Novelty Stunt points averaged Precision scores Both fine pioneer Stunt fliers flew own designs under present method recognition legal OT Stunt events Surely would order PAMPA organization establish design committee like SAM order least consider documented designs admittance OT Stunt list never cease amazed phone calls get since Mike Keville started Vintage Stunt Champs Last night answered voice other end sez Walt Pyron last time Id seen Walt 1953 Willow Grove Pennsylvaniaor maybe Chicago 54 rate seems Walt picked up September issue Model Aviation read copy about old Nationals VSC event Tucson Well like others us hes bitten again plans Tucson March 21st 22nd VSC IV Hearing fliers true Golden Age CL real kick emerges brings up things Ive forgotten adds authenticity Stunt history thing Walt very certain about time span during Bob Elliot first campaigned Black Tiger later become Berkeley kit P-40 Bob March 1992 59 n Arizona have tabulous hying site neyli nost tue rcn ors 1980 spearhead Junior Jerry toIotT aesign wasnt iegai Tor MIU uveilts wasnt kitted until after cutoff date SAM Hall Famer Stoloff recently fixed Continued page 142 aspiring Stunt fliers young old Heres man started Bob bought Akro-Bats saw panic Palmer shows first Stunt ship flaps ular photo Bill Skipper handle Go-Devil Jr powered McCoy 19RV wouldnt Bill Skipper photo Nationals time 1955 new Nobler George taking summer courses University Texas won year Clue It wasnt guy photo Real Stuff Dave ____________Performance Specialties True AAC & ABC Piston/Cylinder Assemblies Serious Horsepower AAC Nelson 40 FAI Formula OS Hanno Special 05 61 SF/RE YS 61R 1 Q-50 Available Following Engines ABC Nelson 40 FAI Formula 1 Q-500 05 32 05 4OVF VRP OS 46SF OS 61SF/RE OS 61VE 0S61 SEN-H REN-H 0561 FSR 05 91 VRDF ST X-40 Rossi 40 YS 45 YS 60 FR/ES YS61 R/SYS 120 Complete Parts & Service OS ST YS & bra Performance Specialties ox 3146 nerville NV 89410 Phone 702-265-7523 FAX 702-265-7522 ViS4I Send $200 1992 Catalog challenge may find yourself flying alongfeet gracelessly scraping random patterns sand So next time its too windy fly plane field taken over special event another dont frustrated Have ball Go fly kite Robins/Wilson Continued page 56 ovations throughout United States England movie staffing Dennis Morgan especially inspirational children eight-to-12 age group Morgan pushed Hollywood stage prop Curtiss P-40 Warhawk 35-degree dive slightly lifting right wing deflection shot gave chase another Japanese Zero sound theater burst machine gun fire six 50caliber weapons enemy plane went down impressionable young boys mentally wore General Scotts three Distinguished Flying Crosses two Silver Stars five Air Medals bib D overalls T-shirts poured out Saturday matin& onto Main Street USA Not few would go fight future air battles defense freedom General Robert L Scott Jr retired US Air Force 1957 Museum Aviation supported voluntary contributions Scott serves its ongoing Campaign Chairman museum boasts first-rate display Scotts 23rd Fighter Group memorabilia God Co-pilot shown museum theater photographs film display first edition responding advertisers mention read about Model Aviation Scotts book presented him mother can also seen enthusiasm staff volunteers nationally prominent depository historical aircraft memorabilia unmistakable Theyre both preserve history tradition Robins Air Force Base US Air Force make visitors feel welcome Anyone attending can expect cordial southern-style greeting followed fascinating educational experience round/Aldrich Continued page 59 built competed locally design 1952 didnt remember since Georgia gang didnt make 1952 Nationals California conversation last week Bill ** 4620 CRANDALL-I ANF$VILLE RD CORYDON INDIANA 47112 ** ____________________________________ __________________________ Large selection Remote Control Model Airplanes professional LISTED BELOW Business since 1973 ES SUBJECT TO CHANGE WITHOUT NOTICE IS JUST FEW OF THE MFGWE STOCK HOURS MONDAYTHRUTHURSpAVOAAA PAA D7nAVOAAAPM A-i USTO JIGCLOSED SATURDAY& AMBR OlD ARCO RUBBERBANDS BRiDI DAVEYS SYSTEMS cOVERiTE DEvcON DREMEL DU-BRO DY NA Fl LITE SONIc-TRONIcS STERLING SULLIVAN TOP FLiTE VS ENGINES LA Ni ER MILLER NORTHEAST ZINGER PROPS complete listing etcplease sends stamped self-address enve lope DEALERS WANTED Limited Quantity STAFFORD SCALE 8-24$300 ENGINES 4 19-25 WINGSPAN 9Oinebes FKKITSIGkkumI FOX FUTABA GOLDBERG GAS MODEL PROD HALLCO HOBBYPOXY HOT STUFF K & B MFG Si G SAITO 142 Model Aviation 0 STAFFORD AIRCOUPE $9995 PLEASE CALL FOR SPECIALS OF THE MONTH Wisniewski K&B Mfg use K&B 325 35 engines may find interesting call inquire about parts Free Flight versions no longer production particular curious about crankshafts breaking Id number shop recently Bill related has run engines 35000 rpm hour no problems told seen breakage 22000 24000 rpm area certain harmonic node rpm range seems be culprit what its worth Marvin Mace fellow club members top competitor uses new 78 x 4 D-l APC prop has no shaft breakage prop holds revs around 21500 ground yet produces better thrust Now K&B has about recovered its move getting back production perhaps folks will consider making improved version great series engines Some time ago mentioned use Coleman lantern fuel good substitute gasoline engines seems always true Bert Striegler senior engineer now retired major oil company informs type fuel closer charcoal lighter fluid gasoline problem recommending certain brand gasolines blended differently various climates What use Texas may work worth Maine starters Ive found 92 octane unleaded gasoline works well climate During summer 1990 Jim Reynolds tried number ignition fuel mixesincluding gasohol 10% ethane castor oil various synthetics old original 70-weight SAE petroleum lube gasohol worked well stopped using because began etch plastic tanks O&Rs Super Cykes etc Some engines O&Rs particular take well synthetics castor oil have also seen engines have run popular synthetic castor oil pistons 004 out round cylinders warped 007 out grooves wrist pins can hang thumb nail have infinite supply good old ignition engines some synthetics will give rpm treasure ignition engines take heed greatest Sal Taibi still uses 70-weight oil mix Ohlssons 21 standard fuel 25% 70-weight 5% Mobil II turbine lube 70% 92 octane unleaded Mobil II lube available airport services jets Turbine lube also made same specification Shell Exxon others Stunt flier aspiring young wrote long ago asking make engines break two-cycle want As turned out answer took lot longer thought would About time getting needle setting realized engine set break two-cycle because because wanted original Nobler 48 oz second-model Fox 35 up front would have marginal two-cycle break illustrate point replica built VSC-I 1989 has OS 35S up front Everything close original could make including lead-out positions During first flight dismayed find model flying such yaw could see whole outboard wheel gear behind inboard OS has much power both lead-outs have moved forward over inch SST tongue muffler installed doesnt have break two-cycle Some may find interesting know dragged out pieces original old bird found quite different either Model Airplane News plan kit though drew plans both versions original either time late summer 1954 left March 1992 143 New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price Just think dont have send Dollars out country obtain QuaUty expect Priced just few Dollars cheapies below quality competition American Made K6 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 Temco Aircraft gone back school Study habits caine hard after two-year hiatus started suffer Nationals itch about June 1955 though new ship California out question particular Nationals probably set rules lasted year have no idea came pass spot landing written rules lasted year 1956 removed anyone recalls came pass would please share us great Bob Palmer never pass up opportunity Bob built first tricycle-geared Nationals winnerwith nose wheel brake operated full down elevator would paint slick Thunderbird deck roll around pop full down right spot Im sure what points Bob beat Jose Sadurni 11 points Clarence Lee third 21 points John Lenderman came fourth 3313 Bill Cummings won Senior year flying Nobler know Nobler carved cowling him 1954 Bill built still flying 1958 Bill won 141 points over Larry Phillips 36 1 points over James Ebenger third young man named Walton Pyron came fifthonly 344 points behind Walt 53 now great hear him hope brings Blackhawk Tucson Little Eddie May Jr came way North Carolina win Junior flying Fox 35-powered Thunderbird beat Rich Renwald 7 points Don Stills proteges Cliff Woodruff Beaumont Texas third flying Stuka kit Fox 29 Probably no else has done much research history Stunt event Wynn Paul sincere thanks Wynn forwarding copies data spent years accumulating great deal mail expresses little consternation over engines available today select given event class enough interest perhaps could elaborate timing affects power its intended use Contrary what seem believe Schnuerle-ported design can deliver just high speed racing performance Listed below details joining organizations will assist interested vintage modeling help locate sources related supplies parts old engines Model Engine Collectors Association MECA 3007 Travis West Lake LA 70669 $15/yr US Canada other $22 US dollars Precision Aerobatics Model Pilots Association PAMPA 1019 Creek Trail Anniston AL 36206 $15/yr US Canada $20 others $25 US dollars Society Antique Modelers SAM Bob Dodds 209 Summerside Ln Encinitas CA 92024 $15/yr US other countries life $150 write want reply please enclose SASE will always answer also accept phone 3 1/5 scale ~jirneOssi __________All Wood Beech D-18/C-45 114 Span twin 035s orG38s $40 Compact Giant 1/7th Scale P-47 Thunderbolt 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 ENO RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 144 Model Aviation THE AMERICAN MADE RJL K61 metal multi mix carburetor 0-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened Steel Crankshaft Aerospace Quality Dual Ball BearingsInvestment Cast Crankcase B-25 Mitchell101 $3800 Ju-87B Stuka100 .3000 DC-3/C-47140 4200 F4U Corsair93 . 3000 PT-17 Stearman 77 2700 P-40 Warhawk94 . 3000 AT-6 Texan101 . 3000 F8F Bearcat86 . 3000 A6M5 Zero91 .3000 Fokker Dr-I63 2700 Semi Scale Taube882500 calls please dont call writing will suffice have business run address 12822 Tarryton San Antonio TX 78233 Tel 512 656-2021 D Vertical TaiI/McCombs Continued page 63 effects mild violent Dutch roll easily produced observed experimentally simple stick-fuselage Rubber model having moderate wing dihedralabout 9O First trim fly well between successive flights cut away tail area small amountsabout 5% existing areaand watch Dutch roll set become worse finally become violent causing crash can also seen using simple all-balsa glider smallest size tail no Dutch roll will larger model having tractor up-front prop no prop glider smaller pusher rear prop reason spinning prop acts like small vertical tail up front cancels out some tails effect requiring increase size tail rear adds tail area tail can smaller nonexistent spinning prop also acts like small horizontal tail larger prop greater effect largest Rubber models vertical tail quite small enough cause noticeable Dutch roll can still small enough cause two other minor troubles model might wander around flight rather staying groove might found small side thrust vertical tail incidence adjustments very effective controlling turn flight either case small increase vertical tail area will eliminate trouble Controllability during flight no concern FF models piloted airplanes Thats have relatively large tails tail must large enough allow good turns ailerons rudder properly coordinated good sideslipping ability landing crosswinds short fields ability maintain heading high power suddenly applied during low-speed landing flight good control taxiing achieve above rudder portion Figure 2a usually 30% 60% tail area can deflected about 30350 either side low-speed taxiing control high-speed flight large rudder deflections needed early-day airplanes such WW Nieuport 11 12 17 Morane-Saulnier L Bristol Scout D Fokker E-III Triplane Pfalz E-l entire tail deflected required much aerodynamic balance area forward hinge line Figure 2c keep pilots effort reasonably small Such tails smaller fin rudder used piloted airplanes tail large during its low-speed flight airplane spirally unstable improves speed increases ie lift coefficient decreases airplane becomes stable during its high-speed flight generally no problem since pilot can correct motion except flying blind FF5 models such airplanes however spiral instability unacceptable must eliminated described later tail will cause spiral instability related troubles flight understand what meant spiral instability suppose FF Duration model generous dihedral power trimmed fly very steeply upward either straight flight spiraling climb spirally unstable will always roll off straight flight undesired spiral may still upward less steeply desired As result less altitude duration achieved trimmed steep spirally upward flight will always roll off undesired shallower spiral less steeply upward again less altitude Continued page 146 March 1992 145 Spiral instability too large vertical
Edition: Model Aviation - 1992/03
Page Numbers: 60, 61, 144, 145, 146, 147
George M Aldrich Up Around 12822 Tarrytown San Antonio TX 78233 MY FIRST engine Super Atom found under Christmas tree 1941 fifth grade class sold magazine subscriptions throughout school year earn points toward multitude prizes Alas come up equivalent $175 short choice between Atom Brownie 29 waning Depression years $175 could just well have $1750 As mothers will arranged principal school make up difference got little Atom run built American Ace 33 10 years old small town never flew war years over finally got first successful flights Spearhead Jr 1946 Years later Old-Timer movement evolved SAM Society Antique Modelers formed first model thought Spearhead Jr disappointing find out design legal Old-Timer since wasnt kitted until after cutoff date December 31 1942 years passed number designs put approved list after designers came forward substantiated model built flown before date mind set out find Jerry Stoloff designer Spearhead took almost year found Jerry Florida Jerry able prove its legality both Spearheads Jr Sr plus design called Yehudi no seemed know existed now legal SAM events great pleasure meet visit Jerry Stoloff Jean Nevada 1991 SAM Champs past October see him inducted SAM Hall Fame great Dill Skipper introduced Akro-Bat 1947 guaranteed fly inverted first such kit market Just look what Bill started Stunt fliers owe Art Adamisin vote thanks huge contribution sport left Bill Hopkins about launch Big Arts Joker nt Vintage Stunt Championships Ill R Don Burgesss Birmingham England Concours dEleganceciass Tipsy Master Models kit Heres model responsible tor Stunt know today Its Mike Pratts faithful rendition Bob Palmers polywog-airfoil Veco Chief Bob also built first tricycle-geared Nationals winner nose wheel brake operated full-down elevator Woisley Photo deeply involved Free Flight also 1946 saw first CL contest first loop Boy hooked Laredo Texas Id hitched ride older guysthe ones 19 20 years old Now older guy goat days goat Free Flight model converted UControl CL La Jimmy Walkers Fireball As 14 year old stood awe guy flipped prop Contestor D6OR-powered goat took off did real ioop really bitten just too older guy turned out Russell Snyder went win Senior Stunt 1946 Nationals Russ went off school Northrop 1946 1949 Olathe Kansas Inglewood Flightmasters national champion club year 1949 Nationals first naturally gravitated toward Russ wound up pitting otherhe taking third Senior Stunt little no practice winner year Senior Don Still As Ive said before Don would have winner Walker Trophy Novelty Stunt points averaged Precision scores Both fine pioneer Stunt fliers flew own designs under present method recognition legal OT Stunt events Surely would order PAMPA organization establish design committee like SAM order least consider documented designs admittance OT Stunt list never cease amazed phone calls get since Mike Keville started Vintage Stunt Champs Last night answered voice other end sez Walt Pyron last time Id seen Walt 1953 Willow Grove Pennsylvaniaor maybe Chicago 54 rate seems Walt picked up September issue Model Aviation read copy about old Nationals VSC event Tucson Well like others us hes bitten again plans Tucson March 21st 22nd VSC IV Hearing fliers true Golden Age CL real kick emerges brings up things Ive forgotten adds authenticity Stunt history thing Walt very certain about time span during Bob Elliot first campaigned Black Tiger later become Berkeley kit P-40 Bob March 1992 59 n Arizona have tabulous hying site neyli nost tue rcn ors 1980 spearhead Junior Jerry toIotT aesign wasnt iegai Tor MIU uveilts wasnt kitted until after cutoff date SAM Hall Famer Stoloff recently fixed Continued page 142 aspiring Stunt fliers young old Heres man started Bob bought Akro-Bats saw panic Palmer shows first Stunt ship flaps ular photo Bill Skipper handle Go-Devil Jr powered McCoy 19RV wouldnt Bill Skipper photo Nationals time 1955 new Nobler George taking summer courses University Texas won year Clue It wasnt guy photo Real Stuff Dave ____________Performance Specialties True AAC & ABC Piston/Cylinder Assemblies Serious Horsepower AAC Nelson 40 FAI Formula OS Hanno Special 05 61 SF/RE YS 61R 1 Q-50 Available Following Engines ABC Nelson 40 FAI Formula 1 Q-500 05 32 05 4OVF VRP OS 46SF OS 61SF/RE OS 61VE 0S61 SEN-H REN-H 0561 FSR 05 91 VRDF ST X-40 Rossi 40 YS 45 YS 60 FR/ES YS61 R/SYS 120 Complete Parts & Service OS ST YS & bra Performance Specialties ox 3146 nerville NV 89410 Phone 702-265-7523 FAX 702-265-7522 ViS4I Send $200 1992 Catalog challenge may find yourself flying alongfeet gracelessly scraping random patterns sand So next time its too windy fly plane field taken over special event another dont frustrated Have ball Go fly kite Robins/Wilson Continued page 56 ovations throughout United States England movie staffing Dennis Morgan especially inspirational children eight-to-12 age group Morgan pushed Hollywood stage prop Curtiss P-40 Warhawk 35-degree dive slightly lifting right wing deflection shot gave chase another Japanese Zero sound theater burst machine gun fire six 50caliber weapons enemy plane went down impressionable young boys mentally wore General Scotts three Distinguished Flying Crosses two Silver Stars five Air Medals bib D overalls T-shirts poured out Saturday matin& onto Main Street USA Not few would go fight future air battles defense freedom General Robert L Scott Jr retired US Air Force 1957 Museum Aviation supported voluntary contributions Scott serves its ongoing Campaign Chairman museum boasts first-rate display Scotts 23rd Fighter Group memorabilia God Co-pilot shown museum theater photographs film display first edition responding advertisers mention read about Model Aviation Scotts book presented him mother can also seen enthusiasm staff volunteers nationally prominent depository historical aircraft memorabilia unmistakable Theyre both preserve history tradition Robins Air Force Base US Air Force make visitors feel welcome Anyone attending can expect cordial southern-style greeting followed fascinating educational experience round/Aldrich Continued page 59 built competed locally design 1952 didnt remember since Georgia gang didnt make 1952 Nationals California conversation last week Bill ** 4620 CRANDALL-I ANF$VILLE RD CORYDON INDIANA 47112 ** ____________________________________ __________________________ Large selection Remote Control Model Airplanes professional LISTED BELOW Business since 1973 ES SUBJECT TO CHANGE WITHOUT NOTICE IS JUST FEW OF THE MFGWE STOCK HOURS MONDAYTHRUTHURSpAVOAAA PAA D7nAVOAAAPM A-i USTO JIGCLOSED SATURDAY& AMBR OlD ARCO RUBBERBANDS BRiDI DAVEYS SYSTEMS cOVERiTE DEvcON DREMEL DU-BRO DY NA Fl LITE SONIc-TRONIcS STERLING SULLIVAN TOP FLiTE VS ENGINES LA Ni ER MILLER NORTHEAST ZINGER PROPS complete listing etcplease sends stamped self-address enve lope DEALERS WANTED Limited Quantity STAFFORD SCALE 8-24$300 ENGINES 4 19-25 WINGSPAN 9Oinebes FKKITSIGkkumI FOX FUTABA GOLDBERG GAS MODEL PROD HALLCO HOBBYPOXY HOT STUFF K & B MFG Si G SAITO 142 Model Aviation 0 STAFFORD AIRCOUPE $9995 PLEASE CALL FOR SPECIALS OF THE MONTH Wisniewski K&B Mfg use K&B 325 35 engines may find interesting call inquire about parts Free Flight versions no longer production particular curious about crankshafts breaking Id number shop recently Bill related has run engines 35000 rpm hour no problems told seen breakage 22000 24000 rpm area certain harmonic node rpm range seems be culprit what its worth Marvin Mace fellow club members top competitor uses new 78 x 4 D-l APC prop has no shaft breakage prop holds revs around 21500 ground yet produces better thrust Now K&B has about recovered its move getting back production perhaps folks will consider making improved version great series engines Some time ago mentioned use Coleman lantern fuel good substitute gasoline engines seems always true Bert Striegler senior engineer now retired major oil company informs type fuel closer charcoal lighter fluid gasoline problem recommending certain brand gasolines blended differently various climates What use Texas may work worth Maine starters Ive found 92 octane unleaded gasoline works well climate During summer 1990 Jim Reynolds tried number ignition fuel mixesincluding gasohol 10% ethane castor oil various synthetics old original 70-weight SAE petroleum lube gasohol worked well stopped using because began etch plastic tanks O&Rs Super Cykes etc Some engines O&Rs particular take well synthetics castor oil have also seen engines have run popular synthetic castor oil pistons 004 out round cylinders warped 007 out grooves wrist pins can hang thumb nail have infinite supply good old ignition engines some synthetics will give rpm treasure ignition engines take heed greatest Sal Taibi still uses 70-weight oil mix Ohlssons 21 standard fuel 25% 70-weight 5% Mobil II turbine lube 70% 92 octane unleaded Mobil II lube available airport services jets Turbine lube also made same specification Shell Exxon others Stunt flier aspiring young wrote long ago asking make engines break two-cycle want As turned out answer took lot longer thought would About time getting needle setting realized engine set break two-cycle because because wanted original Nobler 48 oz second-model Fox 35 up front would have marginal two-cycle break illustrate point replica built VSC-I 1989 has OS 35S up front Everything close original could make including lead-out positions During first flight dismayed find model flying such yaw could see whole outboard wheel gear behind inboard OS has much power both lead-outs have moved forward over inch SST tongue muffler installed doesnt have break two-cycle Some may find interesting know dragged out pieces original old bird found quite different either Model Airplane News plan kit though drew plans both versions original either time late summer 1954 left March 1992 143 New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price Just think dont have send Dollars out country obtain QuaUty expect Priced just few Dollars cheapies below quality competition American Made K6 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 Temco Aircraft gone back school Study habits caine hard after two-year hiatus started suffer Nationals itch about June 1955 though new ship California out question particular Nationals probably set rules lasted year have no idea came pass spot landing written rules lasted year 1956 removed anyone recalls came pass would please share us great Bob Palmer never pass up opportunity Bob built first tricycle-geared Nationals winnerwith nose wheel brake operated full down elevator would paint slick Thunderbird deck roll around pop full down right spot Im sure what points Bob beat Jose Sadurni 11 points Clarence Lee third 21 points John Lenderman came fourth 3313 Bill Cummings won Senior year flying Nobler know Nobler carved cowling him 1954 Bill built still flying 1958 Bill won 141 points over Larry Phillips 36 1 points over James Ebenger third young man named Walton Pyron came fifthonly 344 points behind Walt 53 now great hear him hope brings Blackhawk Tucson Little Eddie May Jr came way North Carolina win Junior flying Fox 35-powered Thunderbird beat Rich Renwald 7 points Don Stills proteges Cliff Woodruff Beaumont Texas third flying Stuka kit Fox 29 Probably no else has done much research history Stunt event Wynn Paul sincere thanks Wynn forwarding copies data spent years accumulating great deal mail expresses little consternation over engines available today select given event class enough interest perhaps could elaborate timing affects power its intended use Contrary what seem believe Schnuerle-ported design can deliver just high speed racing performance Listed below details joining organizations will assist interested vintage modeling help locate sources related supplies parts old engines Model Engine Collectors Association MECA 3007 Travis West Lake LA 70669 $15/yr US Canada other $22 US dollars Precision Aerobatics Model Pilots Association PAMPA 1019 Creek Trail Anniston AL 36206 $15/yr US Canada $20 others $25 US dollars Society Antique Modelers SAM Bob Dodds 209 Summerside Ln Encinitas CA 92024 $15/yr US other countries life $150 write want reply please enclose SASE will always answer also accept phone 3 1/5 scale ~jirneOssi __________All Wood Beech D-18/C-45 114 Span twin 035s orG38s $40 Compact Giant 1/7th Scale P-47 Thunderbolt 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 ENO RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 144 Model Aviation THE AMERICAN MADE RJL K61 metal multi mix carburetor 0-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened Steel Crankshaft Aerospace Quality Dual Ball BearingsInvestment Cast Crankcase B-25 Mitchell101 $3800 Ju-87B Stuka100 .3000 DC-3/C-47140 4200 F4U Corsair93 . 3000 PT-17 Stearman 77 2700 P-40 Warhawk94 . 3000 AT-6 Texan101 . 3000 F8F Bearcat86 . 3000 A6M5 Zero91 .3000 Fokker Dr-I63 2700 Semi Scale Taube882500 calls please dont call writing will suffice have business run address 12822 Tarryton San Antonio TX 78233 Tel 512 656-2021 D Vertical TaiI/McCombs Continued page 63 effects mild violent Dutch roll easily produced observed experimentally simple stick-fuselage Rubber model having moderate wing dihedralabout 9O First trim fly well between successive flights cut away tail area small amountsabout 5% existing areaand watch Dutch roll set become worse finally become violent causing crash can also seen using simple all-balsa glider smallest size tail no Dutch roll will larger model having tractor up-front prop no prop glider smaller pusher rear prop reason spinning prop acts like small vertical tail up front cancels out some tails effect requiring increase size tail rear adds tail area tail can smaller nonexistent spinning prop also acts like small horizontal tail larger prop greater effect largest Rubber models vertical tail quite small enough cause noticeable Dutch roll can still small enough cause two other minor troubles model might wander around flight rather staying groove might found small side thrust vertical tail incidence adjustments very effective controlling turn flight either case small increase vertical tail area will eliminate trouble Controllability during flight no concern FF models piloted airplanes Thats have relatively large tails tail must large enough allow good turns ailerons rudder properly coordinated good sideslipping ability landing crosswinds short fields ability maintain heading high power suddenly applied during low-speed landing flight good control taxiing achieve above rudder portion Figure 2a usually 30% 60% tail area can deflected about 30350 either side low-speed taxiing control high-speed flight large rudder deflections needed early-day airplanes such WW Nieuport 11 12 17 Morane-Saulnier L Bristol Scout D Fokker E-III Triplane Pfalz E-l entire tail deflected required much aerodynamic balance area forward hinge line Figure 2c keep pilots effort reasonably small Such tails smaller fin rudder used piloted airplanes tail large during its low-speed flight airplane spirally unstable improves speed increases ie lift coefficient decreases airplane becomes stable during its high-speed flight generally no problem since pilot can correct motion except flying blind FF5 models such airplanes however spiral instability unacceptable must eliminated described later tail will cause spiral instability related troubles flight understand what meant spiral instability suppose FF Duration model generous dihedral power trimmed fly very steeply upward either straight flight spiraling climb spirally unstable will always roll off straight flight undesired spiral may still upward less steeply desired As result less altitude duration achieved trimmed steep spirally upward flight will always roll off undesired shallower spiral less steeply upward again less altitude Continued page 146 March 1992 145 Spiral instability too large vertical
Edition: Model Aviation - 1992/03
Page Numbers: 60, 61, 144, 145, 146, 147
George M Aldrich Up Around 12822 Tarrytown San Antonio TX 78233 MY FIRST engine Super Atom found under Christmas tree 1941 fifth grade class sold magazine subscriptions throughout school year earn points toward multitude prizes Alas come up equivalent $175 short choice between Atom Brownie 29 waning Depression years $175 could just well have $1750 As mothers will arranged principal school make up difference got little Atom run built American Ace 33 10 years old small town never flew war years over finally got first successful flights Spearhead Jr 1946 Years later Old-Timer movement evolved SAM Society Antique Modelers formed first model thought Spearhead Jr disappointing find out design legal Old-Timer since wasnt kitted until after cutoff date December 31 1942 years passed number designs put approved list after designers came forward substantiated model built flown before date mind set out find Jerry Stoloff designer Spearhead took almost year found Jerry Florida Jerry able prove its legality both Spearheads Jr Sr plus design called Yehudi no seemed know existed now legal SAM events great pleasure meet visit Jerry Stoloff Jean Nevada 1991 SAM Champs past October see him inducted SAM Hall Fame great Dill Skipper introduced Akro-Bat 1947 guaranteed fly inverted first such kit market Just look what Bill started Stunt fliers owe Art Adamisin vote thanks huge contribution sport left Bill Hopkins about launch Big Arts Joker nt Vintage Stunt Championships Ill R Don Burgesss Birmingham England Concours dEleganceciass Tipsy Master Models kit Heres model responsible tor Stunt know today Its Mike Pratts faithful rendition Bob Palmers polywog-airfoil Veco Chief Bob also built first tricycle-geared Nationals winner nose wheel brake operated full-down elevator Woisley Photo deeply involved Free Flight also 1946 saw first CL contest first loop Boy hooked Laredo Texas Id hitched ride older guysthe ones 19 20 years old Now older guy goat days goat Free Flight model converted UControl CL La Jimmy Walkers Fireball As 14 year old stood awe guy flipped prop Contestor D6OR-powered goat took off did real ioop really bitten just too older guy turned out Russell Snyder went win Senior Stunt 1946 Nationals Russ went off school Northrop 1946 1949 Olathe Kansas Inglewood Flightmasters national champion club year 1949 Nationals first naturally gravitated toward Russ wound up pitting otherhe taking third Senior Stunt little no practice winner year Senior Don Still As Ive said before Don would have winner Walker Trophy Novelty Stunt points averaged Precision scores Both fine pioneer Stunt fliers flew own designs under present method recognition legal OT Stunt events Surely would order PAMPA organization establish design committee like SAM order least consider documented designs admittance OT Stunt list never cease amazed phone calls get since Mike Keville started Vintage Stunt Champs Last night answered voice other end sez Walt Pyron last time Id seen Walt 1953 Willow Grove Pennsylvaniaor maybe Chicago 54 rate seems Walt picked up September issue Model Aviation read copy about old Nationals VSC event Tucson Well like others us hes bitten again plans Tucson March 21st 22nd VSC IV Hearing fliers true Golden Age CL real kick emerges brings up things Ive forgotten adds authenticity Stunt history thing Walt very certain about time span during Bob Elliot first campaigned Black Tiger later become Berkeley kit P-40 Bob March 1992 59 n Arizona have tabulous hying site neyli nost tue rcn ors 1980 spearhead Junior Jerry toIotT aesign wasnt iegai Tor MIU uveilts wasnt kitted until after cutoff date SAM Hall Famer Stoloff recently fixed Continued page 142 aspiring Stunt fliers young old Heres man started Bob bought Akro-Bats saw panic Palmer shows first Stunt ship flaps ular photo Bill Skipper handle Go-Devil Jr powered McCoy 19RV wouldnt Bill Skipper photo Nationals time 1955 new Nobler George taking summer courses University Texas won year Clue It wasnt guy photo Real Stuff Dave ____________Performance Specialties True AAC & ABC Piston/Cylinder Assemblies Serious Horsepower AAC Nelson 40 FAI Formula OS Hanno Special 05 61 SF/RE YS 61R 1 Q-50 Available Following Engines ABC Nelson 40 FAI Formula 1 Q-500 05 32 05 4OVF VRP OS 46SF OS 61SF/RE OS 61VE 0S61 SEN-H REN-H 0561 FSR 05 91 VRDF ST X-40 Rossi 40 YS 45 YS 60 FR/ES YS61 R/SYS 120 Complete Parts & Service OS ST YS & bra Performance Specialties ox 3146 nerville NV 89410 Phone 702-265-7523 FAX 702-265-7522 ViS4I Send $200 1992 Catalog challenge may find yourself flying alongfeet gracelessly scraping random patterns sand So next time its too windy fly plane field taken over special event another dont frustrated Have ball Go fly kite Robins/Wilson Continued page 56 ovations throughout United States England movie staffing Dennis Morgan especially inspirational children eight-to-12 age group Morgan pushed Hollywood stage prop Curtiss P-40 Warhawk 35-degree dive slightly lifting right wing deflection shot gave chase another Japanese Zero sound theater burst machine gun fire six 50caliber weapons enemy plane went down impressionable young boys mentally wore General Scotts three Distinguished Flying Crosses two Silver Stars five Air Medals bib D overalls T-shirts poured out Saturday matin& onto Main Street USA Not few would go fight future air battles defense freedom General Robert L Scott Jr retired US Air Force 1957 Museum Aviation supported voluntary contributions Scott serves its ongoing Campaign Chairman museum boasts first-rate display Scotts 23rd Fighter Group memorabilia God Co-pilot shown museum theater photographs film display first edition responding advertisers mention read about Model Aviation Scotts book presented him mother can also seen enthusiasm staff volunteers nationally prominent depository historical aircraft memorabilia unmistakable Theyre both preserve history tradition Robins Air Force Base US Air Force make visitors feel welcome Anyone attending can expect cordial southern-style greeting followed fascinating educational experience round/Aldrich Continued page 59 built competed locally design 1952 didnt remember since Georgia gang didnt make 1952 Nationals California conversation last week Bill ** 4620 CRANDALL-I ANF$VILLE RD CORYDON INDIANA 47112 ** ____________________________________ __________________________ Large selection Remote Control Model Airplanes professional LISTED BELOW Business since 1973 ES SUBJECT TO CHANGE WITHOUT NOTICE IS JUST FEW OF THE MFGWE STOCK HOURS MONDAYTHRUTHURSpAVOAAA PAA D7nAVOAAAPM A-i USTO JIGCLOSED SATURDAY& AMBR OlD ARCO RUBBERBANDS BRiDI DAVEYS SYSTEMS cOVERiTE DEvcON DREMEL DU-BRO DY NA Fl LITE SONIc-TRONIcS STERLING SULLIVAN TOP FLiTE VS ENGINES LA Ni ER MILLER NORTHEAST ZINGER PROPS complete listing etcplease sends stamped self-address enve lope DEALERS WANTED Limited Quantity STAFFORD SCALE 8-24$300 ENGINES 4 19-25 WINGSPAN 9Oinebes FKKITSIGkkumI FOX FUTABA GOLDBERG GAS MODEL PROD HALLCO HOBBYPOXY HOT STUFF K & B MFG Si G SAITO 142 Model Aviation 0 STAFFORD AIRCOUPE $9995 PLEASE CALL FOR SPECIALS OF THE MONTH Wisniewski K&B Mfg use K&B 325 35 engines may find interesting call inquire about parts Free Flight versions no longer production particular curious about crankshafts breaking Id number shop recently Bill related has run engines 35000 rpm hour no problems told seen breakage 22000 24000 rpm area certain harmonic node rpm range seems be culprit what its worth Marvin Mace fellow club members top competitor uses new 78 x 4 D-l APC prop has no shaft breakage prop holds revs around 21500 ground yet produces better thrust Now K&B has about recovered its move getting back production perhaps folks will consider making improved version great series engines Some time ago mentioned use Coleman lantern fuel good substitute gasoline engines seems always true Bert Striegler senior engineer now retired major oil company informs type fuel closer charcoal lighter fluid gasoline problem recommending certain brand gasolines blended differently various climates What use Texas may work worth Maine starters Ive found 92 octane unleaded gasoline works well climate During summer 1990 Jim Reynolds tried number ignition fuel mixesincluding gasohol 10% ethane castor oil various synthetics old original 70-weight SAE petroleum lube gasohol worked well stopped using because began etch plastic tanks O&Rs Super Cykes etc Some engines O&Rs particular take well synthetics castor oil have also seen engines have run popular synthetic castor oil pistons 004 out round cylinders warped 007 out grooves wrist pins can hang thumb nail have infinite supply good old ignition engines some synthetics will give rpm treasure ignition engines take heed greatest Sal Taibi still uses 70-weight oil mix Ohlssons 21 standard fuel 25% 70-weight 5% Mobil II turbine lube 70% 92 octane unleaded Mobil II lube available airport services jets Turbine lube also made same specification Shell Exxon others Stunt flier aspiring young wrote long ago asking make engines break two-cycle want As turned out answer took lot longer thought would About time getting needle setting realized engine set break two-cycle because because wanted original Nobler 48 oz second-model Fox 35 up front would have marginal two-cycle break illustrate point replica built VSC-I 1989 has OS 35S up front Everything close original could make including lead-out positions During first flight dismayed find model flying such yaw could see whole outboard wheel gear behind inboard OS has much power both lead-outs have moved forward over inch SST tongue muffler installed doesnt have break two-cycle Some may find interesting know dragged out pieces original old bird found quite different either Model Airplane News plan kit though drew plans both versions original either time late summer 1954 left March 1992 143 New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price Just think dont have send Dollars out country obtain QuaUty expect Priced just few Dollars cheapies below quality competition American Made K6 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 Temco Aircraft gone back school Study habits caine hard after two-year hiatus started suffer Nationals itch about June 1955 though new ship California out question particular Nationals probably set rules lasted year have no idea came pass spot landing written rules lasted year 1956 removed anyone recalls came pass would please share us great Bob Palmer never pass up opportunity Bob built first tricycle-geared Nationals winnerwith nose wheel brake operated full down elevator would paint slick Thunderbird deck roll around pop full down right spot Im sure what points Bob beat Jose Sadurni 11 points Clarence Lee third 21 points John Lenderman came fourth 3313 Bill Cummings won Senior year flying Nobler know Nobler carved cowling him 1954 Bill built still flying 1958 Bill won 141 points over Larry Phillips 36 1 points over James Ebenger third young man named Walton Pyron came fifthonly 344 points behind Walt 53 now great hear him hope brings Blackhawk Tucson Little Eddie May Jr came way North Carolina win Junior flying Fox 35-powered Thunderbird beat Rich Renwald 7 points Don Stills proteges Cliff Woodruff Beaumont Texas third flying Stuka kit Fox 29 Probably no else has done much research history Stunt event Wynn Paul sincere thanks Wynn forwarding copies data spent years accumulating great deal mail expresses little consternation over engines available today select given event class enough interest perhaps could elaborate timing affects power its intended use Contrary what seem believe Schnuerle-ported design can deliver just high speed racing performance Listed below details joining organizations will assist interested vintage modeling help locate sources related supplies parts old engines Model Engine Collectors Association MECA 3007 Travis West Lake LA 70669 $15/yr US Canada other $22 US dollars Precision Aerobatics Model Pilots Association PAMPA 1019 Creek Trail Anniston AL 36206 $15/yr US Canada $20 others $25 US dollars Society Antique Modelers SAM Bob Dodds 209 Summerside Ln Encinitas CA 92024 $15/yr US other countries life $150 write want reply please enclose SASE will always answer also accept phone 3 1/5 scale ~jirneOssi __________All Wood Beech D-18/C-45 114 Span twin 035s orG38s $40 Compact Giant 1/7th Scale P-47 Thunderbolt 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 ENO RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 144 Model Aviation THE AMERICAN MADE RJL K61 metal multi mix carburetor 0-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened Steel Crankshaft Aerospace Quality Dual Ball BearingsInvestment Cast Crankcase B-25 Mitchell101 $3800 Ju-87B Stuka100 .3000 DC-3/C-47140 4200 F4U Corsair93 . 3000 PT-17 Stearman 77 2700 P-40 Warhawk94 . 3000 AT-6 Texan101 . 3000 F8F Bearcat86 . 3000 A6M5 Zero91 .3000 Fokker Dr-I63 2700 Semi Scale Taube882500 calls please dont call writing will suffice have business run address 12822 Tarryton San Antonio TX 78233 Tel 512 656-2021 D Vertical TaiI/McCombs Continued page 63 effects mild violent Dutch roll easily produced observed experimentally simple stick-fuselage Rubber model having moderate wing dihedralabout 9O First trim fly well between successive flights cut away tail area small amountsabout 5% existing areaand watch Dutch roll set become worse finally become violent causing crash can also seen using simple all-balsa glider smallest size tail no Dutch roll will larger model having tractor up-front prop no prop glider smaller pusher rear prop reason spinning prop acts like small vertical tail up front cancels out some tails effect requiring increase size tail rear adds tail area tail can smaller nonexistent spinning prop also acts like small horizontal tail larger prop greater effect largest Rubber models vertical tail quite small enough cause noticeable Dutch roll can still small enough cause two other minor troubles model might wander around flight rather staying groove might found small side thrust vertical tail incidence adjustments very effective controlling turn flight either case small increase vertical tail area will eliminate trouble Controllability during flight no concern FF models piloted airplanes Thats have relatively large tails tail must large enough allow good turns ailerons rudder properly coordinated good sideslipping ability landing crosswinds short fields ability maintain heading high power suddenly applied during low-speed landing flight good control taxiing achieve above rudder portion Figure 2a usually 30% 60% tail area can deflected about 30350 either side low-speed taxiing control high-speed flight large rudder deflections needed early-day airplanes such WW Nieuport 11 12 17 Morane-Saulnier L Bristol Scout D Fokker E-III Triplane Pfalz E-l entire tail deflected required much aerodynamic balance area forward hinge line Figure 2c keep pilots effort reasonably small Such tails smaller fin rudder used piloted airplanes tail large during its low-speed flight airplane spirally unstable improves speed increases ie lift coefficient decreases airplane becomes stable during its high-speed flight generally no problem since pilot can correct motion except flying blind FF5 models such airplanes however spiral instability unacceptable must eliminated described later tail will cause spiral instability related troubles flight understand what meant spiral instability suppose FF Duration model generous dihedral power trimmed fly very steeply upward either straight flight spiraling climb spirally unstable will always roll off straight flight undesired spiral may still upward less steeply desired As result less altitude duration achieved trimmed steep spirally upward flight will always roll off undesired shallower spiral less steeply upward again less altitude Continued page 146 March 1992 145 Spiral instability too large vertical
Edition: Model Aviation - 1992/03
Page Numbers: 60, 61, 144, 145, 146, 147
George M Aldrich Up Around 12822 Tarrytown San Antonio TX 78233 MY FIRST engine Super Atom found under Christmas tree 1941 fifth grade class sold magazine subscriptions throughout school year earn points toward multitude prizes Alas come up equivalent $175 short choice between Atom Brownie 29 waning Depression years $175 could just well have $1750 As mothers will arranged principal school make up difference got little Atom run built American Ace 33 10 years old small town never flew war years over finally got first successful flights Spearhead Jr 1946 Years later Old-Timer movement evolved SAM Society Antique Modelers formed first model thought Spearhead Jr disappointing find out design legal Old-Timer since wasnt kitted until after cutoff date December 31 1942 years passed number designs put approved list after designers came forward substantiated model built flown before date mind set out find Jerry Stoloff designer Spearhead took almost year found Jerry Florida Jerry able prove its legality both Spearheads Jr Sr plus design called Yehudi no seemed know existed now legal SAM events great pleasure meet visit Jerry Stoloff Jean Nevada 1991 SAM Champs past October see him inducted SAM Hall Fame great Dill Skipper introduced Akro-Bat 1947 guaranteed fly inverted first such kit market Just look what Bill started Stunt fliers owe Art Adamisin vote thanks huge contribution sport left Bill Hopkins about launch Big Arts Joker nt Vintage Stunt Championships Ill R Don Burgesss Birmingham England Concours dEleganceciass Tipsy Master Models kit Heres model responsible tor Stunt know today Its Mike Pratts faithful rendition Bob Palmers polywog-airfoil Veco Chief Bob also built first tricycle-geared Nationals winner nose wheel brake operated full-down elevator Woisley Photo deeply involved Free Flight also 1946 saw first CL contest first loop Boy hooked Laredo Texas Id hitched ride older guysthe ones 19 20 years old Now older guy goat days goat Free Flight model converted UControl CL La Jimmy Walkers Fireball As 14 year old stood awe guy flipped prop Contestor D6OR-powered goat took off did real ioop really bitten just too older guy turned out Russell Snyder went win Senior Stunt 1946 Nationals Russ went off school Northrop 1946 1949 Olathe Kansas Inglewood Flightmasters national champion club year 1949 Nationals first naturally gravitated toward Russ wound up pitting otherhe taking third Senior Stunt little no practice winner year Senior Don Still As Ive said before Don would have winner Walker Trophy Novelty Stunt points averaged Precision scores Both fine pioneer Stunt fliers flew own designs under present method recognition legal OT Stunt events Surely would order PAMPA organization establish design committee like SAM order least consider documented designs admittance OT Stunt list never cease amazed phone calls get since Mike Keville started Vintage Stunt Champs Last night answered voice other end sez Walt Pyron last time Id seen Walt 1953 Willow Grove Pennsylvaniaor maybe Chicago 54 rate seems Walt picked up September issue Model Aviation read copy about old Nationals VSC event Tucson Well like others us hes bitten again plans Tucson March 21st 22nd VSC IV Hearing fliers true Golden Age CL real kick emerges brings up things Ive forgotten adds authenticity Stunt history thing Walt very certain about time span during Bob Elliot first campaigned Black Tiger later become Berkeley kit P-40 Bob March 1992 59 n Arizona have tabulous hying site neyli nost tue rcn ors 1980 spearhead Junior Jerry toIotT aesign wasnt iegai Tor MIU uveilts wasnt kitted until after cutoff date SAM Hall Famer Stoloff recently fixed Continued page 142 aspiring Stunt fliers young old Heres man started Bob bought Akro-Bats saw panic Palmer shows first Stunt ship flaps ular photo Bill Skipper handle Go-Devil Jr powered McCoy 19RV wouldnt Bill Skipper photo Nationals time 1955 new Nobler George taking summer courses University Texas won year Clue It wasnt guy photo Real Stuff Dave ____________Performance Specialties True AAC & ABC Piston/Cylinder Assemblies Serious Horsepower AAC Nelson 40 FAI Formula OS Hanno Special 05 61 SF/RE YS 61R 1 Q-50 Available Following Engines ABC Nelson 40 FAI Formula 1 Q-500 05 32 05 4OVF VRP OS 46SF OS 61SF/RE OS 61VE 0S61 SEN-H REN-H 0561 FSR 05 91 VRDF ST X-40 Rossi 40 YS 45 YS 60 FR/ES YS61 R/SYS 120 Complete Parts & Service OS ST YS & bra Performance Specialties ox 3146 nerville NV 89410 Phone 702-265-7523 FAX 702-265-7522 ViS4I Send $200 1992 Catalog challenge may find yourself flying alongfeet gracelessly scraping random patterns sand So next time its too windy fly plane field taken over special event another dont frustrated Have ball Go fly kite Robins/Wilson Continued page 56 ovations throughout United States England movie staffing Dennis Morgan especially inspirational children eight-to-12 age group Morgan pushed Hollywood stage prop Curtiss P-40 Warhawk 35-degree dive slightly lifting right wing deflection shot gave chase another Japanese Zero sound theater burst machine gun fire six 50caliber weapons enemy plane went down impressionable young boys mentally wore General Scotts three Distinguished Flying Crosses two Silver Stars five Air Medals bib D overalls T-shirts poured out Saturday matin& onto Main Street USA Not few would go fight future air battles defense freedom General Robert L Scott Jr retired US Air Force 1957 Museum Aviation supported voluntary contributions Scott serves its ongoing Campaign Chairman museum boasts first-rate display Scotts 23rd Fighter Group memorabilia God Co-pilot shown museum theater photographs film display first edition responding advertisers mention read about Model Aviation Scotts book presented him mother can also seen enthusiasm staff volunteers nationally prominent depository historical aircraft memorabilia unmistakable Theyre both preserve history tradition Robins Air Force Base US Air Force make visitors feel welcome Anyone attending can expect cordial southern-style greeting followed fascinating educational experience round/Aldrich Continued page 59 built competed locally design 1952 didnt remember since Georgia gang didnt make 1952 Nationals California conversation last week Bill ** 4620 CRANDALL-I ANF$VILLE RD CORYDON INDIANA 47112 ** ____________________________________ __________________________ Large selection Remote Control Model Airplanes professional LISTED BELOW Business since 1973 ES SUBJECT TO CHANGE WITHOUT NOTICE IS JUST FEW OF THE MFGWE STOCK HOURS MONDAYTHRUTHURSpAVOAAA PAA D7nAVOAAAPM A-i USTO JIGCLOSED SATURDAY& AMBR OlD ARCO RUBBERBANDS BRiDI DAVEYS SYSTEMS cOVERiTE DEvcON DREMEL DU-BRO DY NA Fl LITE SONIc-TRONIcS STERLING SULLIVAN TOP FLiTE VS ENGINES LA Ni ER MILLER NORTHEAST ZINGER PROPS complete listing etcplease sends stamped self-address enve lope DEALERS WANTED Limited Quantity STAFFORD SCALE 8-24$300 ENGINES 4 19-25 WINGSPAN 9Oinebes FKKITSIGkkumI FOX FUTABA GOLDBERG GAS MODEL PROD HALLCO HOBBYPOXY HOT STUFF K & B MFG Si G SAITO 142 Model Aviation 0 STAFFORD AIRCOUPE $9995 PLEASE CALL FOR SPECIALS OF THE MONTH Wisniewski K&B Mfg use K&B 325 35 engines may find interesting call inquire about parts Free Flight versions no longer production particular curious about crankshafts breaking Id number shop recently Bill related has run engines 35000 rpm hour no problems told seen breakage 22000 24000 rpm area certain harmonic node rpm range seems be culprit what its worth Marvin Mace fellow club members top competitor uses new 78 x 4 D-l APC prop has no shaft breakage prop holds revs around 21500 ground yet produces better thrust Now K&B has about recovered its move getting back production perhaps folks will consider making improved version great series engines Some time ago mentioned use Coleman lantern fuel good substitute gasoline engines seems always true Bert Striegler senior engineer now retired major oil company informs type fuel closer charcoal lighter fluid gasoline problem recommending certain brand gasolines blended differently various climates What use Texas may work worth Maine starters Ive found 92 octane unleaded gasoline works well climate During summer 1990 Jim Reynolds tried number ignition fuel mixesincluding gasohol 10% ethane castor oil various synthetics old original 70-weight SAE petroleum lube gasohol worked well stopped using because began etch plastic tanks O&Rs Super Cykes etc Some engines O&Rs particular take well synthetics castor oil have also seen engines have run popular synthetic castor oil pistons 004 out round cylinders warped 007 out grooves wrist pins can hang thumb nail have infinite supply good old ignition engines some synthetics will give rpm treasure ignition engines take heed greatest Sal Taibi still uses 70-weight oil mix Ohlssons 21 standard fuel 25% 70-weight 5% Mobil II turbine lube 70% 92 octane unleaded Mobil II lube available airport services jets Turbine lube also made same specification Shell Exxon others Stunt flier aspiring young wrote long ago asking make engines break two-cycle want As turned out answer took lot longer thought would About time getting needle setting realized engine set break two-cycle because because wanted original Nobler 48 oz second-model Fox 35 up front would have marginal two-cycle break illustrate point replica built VSC-I 1989 has OS 35S up front Everything close original could make including lead-out positions During first flight dismayed find model flying such yaw could see whole outboard wheel gear behind inboard OS has much power both lead-outs have moved forward over inch SST tongue muffler installed doesnt have break two-cycle Some may find interesting know dragged out pieces original old bird found quite different either Model Airplane News plan kit though drew plans both versions original either time late summer 1954 left March 1992 143 New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price Just think dont have send Dollars out country obtain QuaUty expect Priced just few Dollars cheapies below quality competition American Made K6 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 Temco Aircraft gone back school Study habits caine hard after two-year hiatus started suffer Nationals itch about June 1955 though new ship California out question particular Nationals probably set rules lasted year have no idea came pass spot landing written rules lasted year 1956 removed anyone recalls came pass would please share us great Bob Palmer never pass up opportunity Bob built first tricycle-geared Nationals winnerwith nose wheel brake operated full down elevator would paint slick Thunderbird deck roll around pop full down right spot Im sure what points Bob beat Jose Sadurni 11 points Clarence Lee third 21 points John Lenderman came fourth 3313 Bill Cummings won Senior year flying Nobler know Nobler carved cowling him 1954 Bill built still flying 1958 Bill won 141 points over Larry Phillips 36 1 points over James Ebenger third young man named Walton Pyron came fifthonly 344 points behind Walt 53 now great hear him hope brings Blackhawk Tucson Little Eddie May Jr came way North Carolina win Junior flying Fox 35-powered Thunderbird beat Rich Renwald 7 points Don Stills proteges Cliff Woodruff Beaumont Texas third flying Stuka kit Fox 29 Probably no else has done much research history Stunt event Wynn Paul sincere thanks Wynn forwarding copies data spent years accumulating great deal mail expresses little consternation over engines available today select given event class enough interest perhaps could elaborate timing affects power its intended use Contrary what seem believe Schnuerle-ported design can deliver just high speed racing performance Listed below details joining organizations will assist interested vintage modeling help locate sources related supplies parts old engines Model Engine Collectors Association MECA 3007 Travis West Lake LA 70669 $15/yr US Canada other $22 US dollars Precision Aerobatics Model Pilots Association PAMPA 1019 Creek Trail Anniston AL 36206 $15/yr US Canada $20 others $25 US dollars Society Antique Modelers SAM Bob Dodds 209 Summerside Ln Encinitas CA 92024 $15/yr US other countries life $150 write want reply please enclose SASE will always answer also accept phone 3 1/5 scale ~jirneOssi __________All Wood Beech D-18/C-45 114 Span twin 035s orG38s $40 Compact Giant 1/7th Scale P-47 Thunderbolt 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 ENO RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 144 Model Aviation THE AMERICAN MADE RJL K61 metal multi mix carburetor 0-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened Steel Crankshaft Aerospace Quality Dual Ball BearingsInvestment Cast Crankcase B-25 Mitchell101 $3800 Ju-87B Stuka100 .3000 DC-3/C-47140 4200 F4U Corsair93 . 3000 PT-17 Stearman 77 2700 P-40 Warhawk94 . 3000 AT-6 Texan101 . 3000 F8F Bearcat86 . 3000 A6M5 Zero91 .3000 Fokker Dr-I63 2700 Semi Scale Taube882500 calls please dont call writing will suffice have business run address 12822 Tarryton San Antonio TX 78233 Tel 512 656-2021 D Vertical TaiI/McCombs Continued page 63 effects mild violent Dutch roll easily produced observed experimentally simple stick-fuselage Rubber model having moderate wing dihedralabout 9O First trim fly well between successive flights cut away tail area small amountsabout 5% existing areaand watch Dutch roll set become worse finally become violent causing crash can also seen using simple all-balsa glider smallest size tail no Dutch roll will larger model having tractor up-front prop no prop glider smaller pusher rear prop reason spinning prop acts like small vertical tail up front cancels out some tails effect requiring increase size tail rear adds tail area tail can smaller nonexistent spinning prop also acts like small horizontal tail larger prop greater effect largest Rubber models vertical tail quite small enough cause noticeable Dutch roll can still small enough cause two other minor troubles model might wander around flight rather staying groove might found small side thrust vertical tail incidence adjustments very effective controlling turn flight either case small increase vertical tail area will eliminate trouble Controllability during flight no concern FF models piloted airplanes Thats have relatively large tails tail must large enough allow good turns ailerons rudder properly coordinated good sideslipping ability landing crosswinds short fields ability maintain heading high power suddenly applied during low-speed landing flight good control taxiing achieve above rudder portion Figure 2a usually 30% 60% tail area can deflected about 30350 either side low-speed taxiing control high-speed flight large rudder deflections needed early-day airplanes such WW Nieuport 11 12 17 Morane-Saulnier L Bristol Scout D Fokker E-III Triplane Pfalz E-l entire tail deflected required much aerodynamic balance area forward hinge line Figure 2c keep pilots effort reasonably small Such tails smaller fin rudder used piloted airplanes tail large during its low-speed flight airplane spirally unstable improves speed increases ie lift coefficient decreases airplane becomes stable during its high-speed flight generally no problem since pilot can correct motion except flying blind FF5 models such airplanes however spiral instability unacceptable must eliminated described later tail will cause spiral instability related troubles flight understand what meant spiral instability suppose FF Duration model generous dihedral power trimmed fly very steeply upward either straight flight spiraling climb spirally unstable will always roll off straight flight undesired spiral may still upward less steeply desired As result less altitude duration achieved trimmed steep spirally upward flight will always roll off undesired shallower spiral less steeply upward again less altitude Continued page 146 March 1992 145 Spiral instability too large vertical