Control Line Aerobatics Ted Fancher SAVED mailman Its two days after Christmas write Ive staring old word processor past half-hour trying conjure up something interest intrigue loyal Stunt fan having absolutely no luck coming up thing old computer no help until give something process As about write resignation frustration should appear over shoulder faithful coffee-cooker Nats com panion Shareen bearing days correspon dence promptly returned bills welcomed diversion letter dealing matters model-aeronautical author letter asking thoughts relative building biplane competitive Stunter Wow What great idea says Better yet what great solution lack material column Since subject will take short note address let body can either profit wisdom laugh ignorance Go ahead can take think person enjoys Aerobatics flies Control Line has time another considered slick would perform CL Stunt close-to-scale biplane know certainly have time built old Sterling Models Flying Fools basically sport biplane fairly smallbut symmetrically-alrfoiledwings seems Flying Fool aptly named fun fly left lot desired caine competition-level Stunt other hand same thing could said about some monoplane kits So maybe just designed right Lets answer obvious question first Yes think biplane could designed built competitive Could win Nats dont think no doubt mind right ship right hands could qualify flyoffs first important thing consider bipe DRAGin capital letters frontal area two wings substantially greater single equal area addition struts etc necessary mount upper wing must considered As know drag must overcome thrust olden days Fox 35s might have too much obstacle Today however have access abundant power form popular 60s both ST Merco current 60 ships could stand little drag anyhow just get slowed down can see First problem solved Plan using big mo-mo second problem also drag-related duced drag drag by-product producing lift fly corner given radius requires certain amount lift ie threepound airplane lOG corner must produce 30 lb lift drag produced developing lift can vary greatly depending almost entirely confignration wing/wings Long slender wings will develop very little drag given lift short stubby ones will develop lot true whether have wing dozen however another problem endemic multi-winged craft interference between upper lower wings total lift developed wings combination reduced pressure upper surface creased pressure bottom As can see reduce pressure top lower wing bipe also reduce pressure bottom upper wing Whoops good huh Continued page 163 Glen Alison driving force behind CLAPA British counterpart PAMPA builtthis lovelysemiscale StunterL ST 60 drives 13 x 5 prop haul Its 52 oz fine style Aces past present R Billy Suarez L best years past has returned fray compete todays best current National Champion Jimmy Casale R two beautiful ships Urtnowski photo Windy Urtnowski seemsto grind out endless number superbly-finished Stunters No nottwo photos same plane Look closely atthe white wing trim stabilizer placement left Relentless Greenaway/ST 60 power other R Overdog has 750 sq wing area weighs 62 oz Wing/fuel tank/engine come Big Jim Greenaway Urtnowskl pics April 1987 67 THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft Cars Boats Radios eSystems Engines Hardware Books eFinishing Materials Accessories Videos R/C Dealers Win $1 000 $500 $250 R/C Merchandise retailer choice eligible simply fill out return reader survey form issue RCBG 10th edition Winners will chosen random drawing Reader Survey participants local hobby shop does stock copies Guide please send request payment IS 10 plus postage/handflng 3 tec RadioContml Buyers Guide Clifton HouseClifton VA 22024 * You may use VISA Mautercard charge payment sending card number Cepiration date order cant expect output unless some form input input has come Scale modeler NASA now requesting input same columnists form photos building ideas contest reports rules problems gripes compliments can used newsletter now send material John Guenther RR#3 Box 261 Borden 1N47106 will see Stan gets FM team trials NASA now working upcoming team selection program urges interested Scale modelers West Coast East Coast make feelings known subject how/when/where trials should held Editors note Bill Boss could have known time wrote column Scale Team Selection Committee voted hold finals 1987 Nats siteLincoln NEon July 8-11 just prior start oftheNats RMcM John Guenther Team Selection Committee Chairman also looking modelers inter ested helping Scale judging chores both CL RC events NASA hopeful years program will produce some new faces new models perhaps team will emerge models fly well can also meet challenge static judging world competition last years team excel lent-flying models did team basis live up static judging challenge NASA-sponsored meet program Dale Arvin NASA VP has suggested NASA develop Scale meet program NASA would sponsor Scale meets AMA district events must FF CL RC Scale program would provide reimbursement AMA meet-sanction fee NASA provide Flight Achievement Award would bestowed along other troPhies awards provided meets primary sponsor Again full details latest effort NASA promote Scale modeling contact John Guenther address given few paragraphs above Well folks looks like NASA has taken several large steps its efforts representing organization Scale matters now up meet challenge respond ing Remember communication key word final analysis NASA can good representative Scale modeling community Scale modeler make Let NASA hear Please send correspondenceand espe ciallyphotosrelatingto CL Scale BillBoss 77-06 269 Street New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 67 usual solution space two wings least chord-width apart vertically have upper wing located somewhat forward lower Because plan operate Stunters fairly large angles attack would consider one-chord-width separation minimum might opt little extra good measure think good planform combat problems would two wings nearly equal size high aspect ratio ie span six seven times average chord upper wing would 1-times-the-average-chord higher lower both wings would approx imately equidistant vertically thrust line * *** MPROUED** * ~jgjj Plaid will mars wait Power * INoDes **WANDIT *U5Pster * *Dealers Irrotnd * yeUxIUrraTtYr 1 loft CORDJ * * torDry Stick Abrasive * *A Keen Machine gives exceptional *sanding control br excellent tinish * * 8ggg llaxrc mcI 1 hat Wand arid 1 * egnin *1 08gj Burlder Special 501 2 tIat 1 saltround wand axd 5 xl t grita *1 xe mxcuden 3 tIat 2 traIt Ixcnd * ndS 1 hull eands tO xl * grrts * Additional Wands Abrasives available * WANDIT MANUFACTURING 214 288-5789 * *PO Box 266 e Mesquite Texas 75149* April 1987 163 5105 Psroee*ucs sAss iAu5d555 cLissus Pass LIcSTCEIcST *LUC5U5 sassuacs *asS Yes PULL SIRS PUTTECsS IVOUC cesict 1LL5ST55Y55 P*eulcarIss *55 PLYInG lIST5UcVl5IS S. 5 5AC5 55 sIs PACK IPICS Sal 0 OGA 0 OGA Designs os OGA Designs o DGA Designs. OGA Designs 0 C C *DARNED GOOD AIRMEN Lightest weight Pilots Available 0 * FULL BODY PILOT KIT Lifelike Vinyl latex trbber parts Easy assenble ttnrsh Kt contains Pilot head hands boots helnnet cap goggles frill tenrplates easy instnnctions Fully positionable too.0 Height- WeighS- NEW Low PeSOS-0 0 No206 1/6 Scale lid8 2 oz S72 No20n tB Scale 14 30zs8c No20* 1/4 Scale l7~ 4oz s *BU5T PILOT KIT rtteoe amyt atc,tayO Bolt[tI 5 No203 —13 Scale 23t8 60z st6 SPORTSMAN ot BARNSTORSoISB-FULL BOOT BUST St Socrates Pilot Bead flettaret aBort cop daddies atd Jacket. . Easy asaCCtbte tntsh CHeight- WeIght- Low prlees0 jetdNo100thOhitCaladdOeh5Qh5 ONo 100 -t hBhaIed70tiaCe 5No ted -ld BCdIOd3 8ti aptS*some01 No OS tdBooIe5352-I dotsl4Z Slttipte5 00*1895 rgtiltOd 50 S .. AotOrondieg realise ottoingblO plOOtlOO.. 0 ODoe yet eoleme light weight Oat cantyiCtad 11 cody Bttat CStats 011 hdae little ca etteot halmttClt hatt atCtdlt -0 0Send slOO Catalog 5 0 New VoltS stole Residents dad ph sates leo. 50011 Check MO. coos AtIots 3 weeks tot Cheek Clear 15 DGA Designs 00 DGA 0 DGA Designs avoid having drag wings affect inside versus outside turn equality would sweep upper wing back little sake appearance locate about quarter third chord forward lower wing average chord would also consider using no 12%-thick airfoil reasons too lengthy now No big deal want use thickness big should wings ask Good question Shouldyou use flaps Another good question Area should based weight assume upper limit 13 ounces per square foot area acceptable competitive flying. do. should based predicted weight Although Ive seen 60 ships heavy 80 oz fly well would prefer limit bipe no 70 again because drag going greater 70-oz ship 13 oz/sq ft wing loading works outto 775 sq m Ive got real problem flaps Because high-aspect-ratio wing dont really think would necessary lift Since bipe has inherent drag also question desirability increased drag caused flaps other hand would really make nervous build Stunter balance think would cross fingers go flaps choose use both wings Couple lower flaps usual bellcrank elevators tie upper flaps lower vertical pushrods trailing edge about halfway out really dIstInctIve things about fullscale bipes short stubby fuselages especially special Aerobatic types such Pitta Christen Eagle Unfortunately such configuration isnt appropriate use short coupling full-size bipes primarily enhancing snap rolls dont snap rolls What some very abrupt pitch changes require impressive amounts tail author ity requires long tail moments large tail feathers stab elevator together should roughiy 16% 18% total wing area no flaps used much 22% use flaps Thats correct bigger tail necessary flaps Check series design ran May-October 1985 issues discussion pitching moment duced flaps tail moment tough define Since biplane configuration differs much normal Stunter becomes impossible use accepted hinge line-to-hinge line measurement what would Looking directly down top ship measure jthe distance leading edge upper wing trailing edge lower halfway out span either wing tapers upper wing swept Lets call average chord both wings Now take 25% number locate spot far aft upper leading edge comes educated guess Multiply first number average chord both wings 20 using no flaps 22 using flaps Plot distance aft 25% location previously noted locate hinge line stab/elevator point number derived Nats-winning Citation V may may final word biplanes never said first would perfect did length nose willbe toughest problems Ideally should long enough 164 Model Aviation THE JOURNAL OFJOURIIAL THE AIRPLANE 1920 1940TItE EARLY AEROPLAINE Leo Opdycke EditorKenn Rust Editor WW1 AERO 1 900-1 91 9 SKYWAYS 1 9201940 two Journals contain information current projects historical research news museums airshows workshop notes technical drawings data information paint color photographs aeroplanes engines parts sale O scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies 54 Published WORLD WAR 1 G #pnat~ INC t5 Crcscertt Road Pottqhkccpste NY 12601 USA 914 473-5679 RADIO SOUTH ufum. 43 W Nine Mile Rd Pensacola FL 32514 Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 4BV1875 Futaba conn2150 1200 ma Pack 48V1975 Futeba conn2250 TX batt Futaba 0-series orPCM2250 Os OS 25 FP 4250 OS 25 FSR 5750 OS 4OFP 4950 OS 4OFSR 8350 OS 2OFC 8950 OS4OFC 10950 0S61 FC 14350 OS9OFC 17250 Alse Carry ACE Field Charger Chargemaster Dual Charger 12 V Charger Voitmaster Tachmaster 4-20 Kit 4-40 Kit 4-60 Kit 3450 3950 3950 2750 2750 3150 3350 4150 5550 FUTABA FP-2NL5700 FP-2PKA-S289000 FP-4NL-S3810700 FP-4NL-S3312200 FP-6NLK AM16400 FP-6NLK FM18400 FP-SNLP PCM22400 FP-8SGA PCM 47900 FP-8SSA PCM 59900 Boki berg Delia MAC Zin go, K & B Rocket City Dave Brown anal I,NCII mit Orders COD VISA MC ge actual UPS charges OPEN 10-6 EST 904 478-6745 Nohandlingcharges es subject change notice Complete Futaba Repair Center balance rest airplane adding useless weight shorter better estimation recognize heavier tend build longer should Again classic measurement leading edge-to-spinner-backplate useless because two wings tendency will make short again like full-scale biplanes Resist temptation make slightly shorter normal Stunter pretty much takes care planform What else has considered 1 Center Gravity should located conventionally except must consider both wings Based once again average chord both wings determined figuring tall moments plan location 16% 20% flaps slightly forward say 12% 15% no flaps 2 Belicrank location ensure biplane flies straight off lines vertical location bellcrank must closely approxi mate vertical location center gravity Unfortunately means must mounted fuselage between upper lower wings lead-outs must exit fuselage supported guide mounted interwing strut inboard side flight circle An eyeball guess mass involved would strongly suggest bellcrank placed slightly below thrust line suming thrust line located sug gested midway between two wings Its foreand-aft location less critical should closv CG usual reasons lead-outs should conventionally swept about three degrees aft CG sure support inter-wing strut allow usual adjustment range should about wont perfect first time what might wondering will add up competitive Stunter dont think can win Nats Fair question optimize planform wings reduce interference induced drag minimum ratio drag lift will still exceed pure monoplane Stunter addition no way know build two wings light same area As result will take exceptional building skills achieve com petitive wing loadings Still have seen some pretty rudi mentary biplanes complete Stunt pattern knows Perhaps could done have wrong before Go Tom Dixon has announced availability special production run Merco 61 Stunt en gines engines feature dual piston rings excellent compression seal glow plug lo cated rear cylinder ensure smooth ignition engines come Merco Standard Silencer CL venturi Anyone witnessed well Toms 61 ran 86 Nats couldnt help interested having copy himself Full parts backnp service available through Tom other Merco engines information write Tom Dixon Suite 401 1938 Peachtree Road NW Atlanta GA 30309 same vein received notification Doc Passen US representative Cipolla Model Engines actively considering production ofalightweight plain-bearing CL 35 aimed Control Line Stunt info get Bye now Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Navy Carrier/Perry Continued page 68 anything Profile models weigh 28 oz less Line Construction four line terminations shown photo legal commercial crimps have either three two lengths wire through crimped sleeve rule book dia gram crimped-sleeve line construction probably based commercial practice better method recommended Remember FLYLINE MODELS INC P 0 Ba 2136 Farfos Vrrgna 22031 U S •cI April 1987165 A Classic R/C ScaleLAK TH O Wing 15 25 Engines Dealers ributors Weicomed Phone 703 273-9593 IEAST Tony Frackowiaks Challenge IV Kit Hattori Pipes Headers ASANO Laminated wood props RC Acrobatic Specialists PO Box 388914-248-8603 Lincolndale NY 10540 Send $100 catalog Puzzled CALL MATT No time build Melt Ill hove time. ead knew 1 Complete 2 Semi-Assembled reedy cover sandedi ca 9am- 8pm lEST 6093951672 Send prices Kits Engines accessories 9D Mitts Model Building P0 Box 49 1 Stockton Drive Crenhury NJ 06512 Rate cards available free SASE 4-118s 9-1/2 also build Cars Boats
Edition: Model Aviation - 1987/04
Page Numbers: 67, 163, 164, 165
Control Line Aerobatics Ted Fancher SAVED mailman Its two days after Christmas write Ive staring old word processor past half-hour trying conjure up something interest intrigue loyal Stunt fan having absolutely no luck coming up thing old computer no help until give something process As about write resignation frustration should appear over shoulder faithful coffee-cooker Nats com panion Shareen bearing days correspon dence promptly returned bills welcomed diversion letter dealing matters model-aeronautical author letter asking thoughts relative building biplane competitive Stunter Wow What great idea says Better yet what great solution lack material column Since subject will take short note address let body can either profit wisdom laugh ignorance Go ahead can take think person enjoys Aerobatics flies Control Line has time another considered slick would perform CL Stunt close-to-scale biplane know certainly have time built old Sterling Models Flying Fools basically sport biplane fairly smallbut symmetrically-alrfoiledwings seems Flying Fool aptly named fun fly left lot desired caine competition-level Stunt other hand same thing could said about some monoplane kits So maybe just designed right Lets answer obvious question first Yes think biplane could designed built competitive Could win Nats dont think no doubt mind right ship right hands could qualify flyoffs first important thing consider bipe DRAGin capital letters frontal area two wings substantially greater single equal area addition struts etc necessary mount upper wing must considered As know drag must overcome thrust olden days Fox 35s might have too much obstacle Today however have access abundant power form popular 60s both ST Merco current 60 ships could stand little drag anyhow just get slowed down can see First problem solved Plan using big mo-mo second problem also drag-related duced drag drag by-product producing lift fly corner given radius requires certain amount lift ie threepound airplane lOG corner must produce 30 lb lift drag produced developing lift can vary greatly depending almost entirely confignration wing/wings Long slender wings will develop very little drag given lift short stubby ones will develop lot true whether have wing dozen however another problem endemic multi-winged craft interference between upper lower wings total lift developed wings combination reduced pressure upper surface creased pressure bottom As can see reduce pressure top lower wing bipe also reduce pressure bottom upper wing Whoops good huh Continued page 163 Glen Alison driving force behind CLAPA British counterpart PAMPA builtthis lovelysemiscale StunterL ST 60 drives 13 x 5 prop haul Its 52 oz fine style Aces past present R Billy Suarez L best years past has returned fray compete todays best current National Champion Jimmy Casale R two beautiful ships Urtnowski photo Windy Urtnowski seemsto grind out endless number superbly-finished Stunters No nottwo photos same plane Look closely atthe white wing trim stabilizer placement left Relentless Greenaway/ST 60 power other R Overdog has 750 sq wing area weighs 62 oz Wing/fuel tank/engine come Big Jim Greenaway Urtnowskl pics April 1987 67 THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft Cars Boats Radios eSystems Engines Hardware Books eFinishing Materials Accessories Videos R/C Dealers Win $1 000 $500 $250 R/C Merchandise retailer choice eligible simply fill out return reader survey form issue RCBG 10th edition Winners will chosen random drawing Reader Survey participants local hobby shop does stock copies Guide please send request payment IS 10 plus postage/handflng 3 tec RadioContml Buyers Guide Clifton HouseClifton VA 22024 * You may use VISA Mautercard charge payment sending card number Cepiration date order cant expect output unless some form input input has come Scale modeler NASA now requesting input same columnists form photos building ideas contest reports rules problems gripes compliments can used newsletter now send material John Guenther RR#3 Box 261 Borden 1N47106 will see Stan gets FM team trials NASA now working upcoming team selection program urges interested Scale modelers West Coast East Coast make feelings known subject how/when/where trials should held Editors note Bill Boss could have known time wrote column Scale Team Selection Committee voted hold finals 1987 Nats siteLincoln NEon July 8-11 just prior start oftheNats RMcM John Guenther Team Selection Committee Chairman also looking modelers inter ested helping Scale judging chores both CL RC events NASA hopeful years program will produce some new faces new models perhaps team will emerge models fly well can also meet challenge static judging world competition last years team excel lent-flying models did team basis live up static judging challenge NASA-sponsored meet program Dale Arvin NASA VP has suggested NASA develop Scale meet program NASA would sponsor Scale meets AMA district events must FF CL RC Scale program would provide reimbursement AMA meet-sanction fee NASA provide Flight Achievement Award would bestowed along other troPhies awards provided meets primary sponsor Again full details latest effort NASA promote Scale modeling contact John Guenther address given few paragraphs above Well folks looks like NASA has taken several large steps its efforts representing organization Scale matters now up meet challenge respond ing Remember communication key word final analysis NASA can good representative Scale modeling community Scale modeler make Let NASA hear Please send correspondenceand espe ciallyphotosrelatingto CL Scale BillBoss 77-06 269 Street New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 67 usual solution space two wings least chord-width apart vertically have upper wing located somewhat forward lower Because plan operate Stunters fairly large angles attack would consider one-chord-width separation minimum might opt little extra good measure think good planform combat problems would two wings nearly equal size high aspect ratio ie span six seven times average chord upper wing would 1-times-the-average-chord higher lower both wings would approx imately equidistant vertically thrust line * *** MPROUED** * ~jgjj Plaid will mars wait Power * INoDes **WANDIT *U5Pster * *Dealers Irrotnd * yeUxIUrraTtYr 1 loft CORDJ * * torDry Stick Abrasive * *A Keen Machine gives exceptional *sanding control br excellent tinish * * 8ggg llaxrc mcI 1 hat Wand arid 1 * egnin *1 08gj Burlder Special 501 2 tIat 1 saltround wand axd 5 xl t grita *1 xe mxcuden 3 tIat 2 traIt Ixcnd * ndS 1 hull eands tO xl * grrts * Additional Wands Abrasives available * WANDIT MANUFACTURING 214 288-5789 * *PO Box 266 e Mesquite Texas 75149* April 1987 163 5105 Psroee*ucs sAss iAu5d555 cLissus Pass LIcSTCEIcST *LUC5U5 sassuacs *asS Yes PULL SIRS PUTTECsS IVOUC cesict 1LL5ST55Y55 P*eulcarIss *55 PLYInG lIST5UcVl5IS S. 5 5AC5 55 sIs PACK IPICS Sal 0 OGA 0 OGA Designs os OGA Designs o DGA Designs. OGA Designs 0 C C *DARNED GOOD AIRMEN Lightest weight Pilots Available 0 * FULL BODY PILOT KIT Lifelike Vinyl latex trbber parts Easy assenble ttnrsh Kt contains Pilot head hands boots helnnet cap goggles frill tenrplates easy instnnctions Fully positionable too.0 Height- WeighS- NEW Low PeSOS-0 0 No206 1/6 Scale lid8 2 oz S72 No20n tB Scale 14 30zs8c No20* 1/4 Scale l7~ 4oz s *BU5T PILOT KIT rtteoe amyt atc,tayO Bolt[tI 5 No203 —13 Scale 23t8 60z st6 SPORTSMAN ot BARNSTORSoISB-FULL BOOT BUST St Socrates Pilot Bead flettaret aBort cop daddies atd Jacket. . Easy asaCCtbte tntsh CHeight- WeIght- Low prlees0 jetdNo100thOhitCaladdOeh5Qh5 ONo 100 -t hBhaIed70tiaCe 5No ted -ld BCdIOd3 8ti aptS*some01 No OS tdBooIe5352-I dotsl4Z Slttipte5 00*1895 rgtiltOd 50 S .. AotOrondieg realise ottoingblO plOOtlOO.. 0 ODoe yet eoleme light weight Oat cantyiCtad 11 cody Bttat CStats 011 hdae little ca etteot halmttClt hatt atCtdlt -0 0Send slOO Catalog 5 0 New VoltS stole Residents dad ph sates leo. 50011 Check MO. coos AtIots 3 weeks tot Cheek Clear 15 DGA Designs 00 DGA 0 DGA Designs avoid having drag wings affect inside versus outside turn equality would sweep upper wing back little sake appearance locate about quarter third chord forward lower wing average chord would also consider using no 12%-thick airfoil reasons too lengthy now No big deal want use thickness big should wings ask Good question Shouldyou use flaps Another good question Area should based weight assume upper limit 13 ounces per square foot area acceptable competitive flying. do. should based predicted weight Although Ive seen 60 ships heavy 80 oz fly well would prefer limit bipe no 70 again because drag going greater 70-oz ship 13 oz/sq ft wing loading works outto 775 sq m Ive got real problem flaps Because high-aspect-ratio wing dont really think would necessary lift Since bipe has inherent drag also question desirability increased drag caused flaps other hand would really make nervous build Stunter balance think would cross fingers go flaps choose use both wings Couple lower flaps usual bellcrank elevators tie upper flaps lower vertical pushrods trailing edge about halfway out really dIstInctIve things about fullscale bipes short stubby fuselages especially special Aerobatic types such Pitta Christen Eagle Unfortunately such configuration isnt appropriate use short coupling full-size bipes primarily enhancing snap rolls dont snap rolls What some very abrupt pitch changes require impressive amounts tail author ity requires long tail moments large tail feathers stab elevator together should roughiy 16% 18% total wing area no flaps used much 22% use flaps Thats correct bigger tail necessary flaps Check series design ran May-October 1985 issues discussion pitching moment duced flaps tail moment tough define Since biplane configuration differs much normal Stunter becomes impossible use accepted hinge line-to-hinge line measurement what would Looking directly down top ship measure jthe distance leading edge upper wing trailing edge lower halfway out span either wing tapers upper wing swept Lets call average chord both wings Now take 25% number locate spot far aft upper leading edge comes educated guess Multiply first number average chord both wings 20 using no flaps 22 using flaps Plot distance aft 25% location previously noted locate hinge line stab/elevator point number derived Nats-winning Citation V may may final word biplanes never said first would perfect did length nose willbe toughest problems Ideally should long enough 164 Model Aviation THE JOURNAL OFJOURIIAL THE AIRPLANE 1920 1940TItE EARLY AEROPLAINE Leo Opdycke EditorKenn Rust Editor WW1 AERO 1 900-1 91 9 SKYWAYS 1 9201940 two Journals contain information current projects historical research news museums airshows workshop notes technical drawings data information paint color photographs aeroplanes engines parts sale O scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies 54 Published WORLD WAR 1 G #pnat~ INC t5 Crcscertt Road Pottqhkccpste NY 12601 USA 914 473-5679 RADIO SOUTH ufum. 43 W Nine Mile Rd Pensacola FL 32514 Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 4BV1875 Futaba conn2150 1200 ma Pack 48V1975 Futeba conn2250 TX batt Futaba 0-series orPCM2250 Os OS 25 FP 4250 OS 25 FSR 5750 OS 4OFP 4950 OS 4OFSR 8350 OS 2OFC 8950 OS4OFC 10950 0S61 FC 14350 OS9OFC 17250 Alse Carry ACE Field Charger Chargemaster Dual Charger 12 V Charger Voitmaster Tachmaster 4-20 Kit 4-40 Kit 4-60 Kit 3450 3950 3950 2750 2750 3150 3350 4150 5550 FUTABA FP-2NL5700 FP-2PKA-S289000 FP-4NL-S3810700 FP-4NL-S3312200 FP-6NLK AM16400 FP-6NLK FM18400 FP-SNLP PCM22400 FP-8SGA PCM 47900 FP-8SSA PCM 59900 Boki berg Delia MAC Zin go, K & B Rocket City Dave Brown anal I,NCII mit Orders COD VISA MC ge actual UPS charges OPEN 10-6 EST 904 478-6745 Nohandlingcharges es subject change notice Complete Futaba Repair Center balance rest airplane adding useless weight shorter better estimation recognize heavier tend build longer should Again classic measurement leading edge-to-spinner-backplate useless because two wings tendency will make short again like full-scale biplanes Resist temptation make slightly shorter normal Stunter pretty much takes care planform What else has considered 1 Center Gravity should located conventionally except must consider both wings Based once again average chord both wings determined figuring tall moments plan location 16% 20% flaps slightly forward say 12% 15% no flaps 2 Belicrank location ensure biplane flies straight off lines vertical location bellcrank must closely approxi mate vertical location center gravity Unfortunately means must mounted fuselage between upper lower wings lead-outs must exit fuselage supported guide mounted interwing strut inboard side flight circle An eyeball guess mass involved would strongly suggest bellcrank placed slightly below thrust line suming thrust line located sug gested midway between two wings Its foreand-aft location less critical should closv CG usual reasons lead-outs should conventionally swept about three degrees aft CG sure support inter-wing strut allow usual adjustment range should about wont perfect first time what might wondering will add up competitive Stunter dont think can win Nats Fair question optimize planform wings reduce interference induced drag minimum ratio drag lift will still exceed pure monoplane Stunter addition no way know build two wings light same area As result will take exceptional building skills achieve com petitive wing loadings Still have seen some pretty rudi mentary biplanes complete Stunt pattern knows Perhaps could done have wrong before Go Tom Dixon has announced availability special production run Merco 61 Stunt en gines engines feature dual piston rings excellent compression seal glow plug lo cated rear cylinder ensure smooth ignition engines come Merco Standard Silencer CL venturi Anyone witnessed well Toms 61 ran 86 Nats couldnt help interested having copy himself Full parts backnp service available through Tom other Merco engines information write Tom Dixon Suite 401 1938 Peachtree Road NW Atlanta GA 30309 same vein received notification Doc Passen US representative Cipolla Model Engines actively considering production ofalightweight plain-bearing CL 35 aimed Control Line Stunt info get Bye now Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Navy Carrier/Perry Continued page 68 anything Profile models weigh 28 oz less Line Construction four line terminations shown photo legal commercial crimps have either three two lengths wire through crimped sleeve rule book dia gram crimped-sleeve line construction probably based commercial practice better method recommended Remember FLYLINE MODELS INC P 0 Ba 2136 Farfos Vrrgna 22031 U S •cI April 1987165 A Classic R/C ScaleLAK TH O Wing 15 25 Engines Dealers ributors Weicomed Phone 703 273-9593 IEAST Tony Frackowiaks Challenge IV Kit Hattori Pipes Headers ASANO Laminated wood props RC Acrobatic Specialists PO Box 388914-248-8603 Lincolndale NY 10540 Send $100 catalog Puzzled CALL MATT No time build Melt Ill hove time. ead knew 1 Complete 2 Semi-Assembled reedy cover sandedi ca 9am- 8pm lEST 6093951672 Send prices Kits Engines accessories 9D Mitts Model Building P0 Box 49 1 Stockton Drive Crenhury NJ 06512 Rate cards available free SASE 4-118s 9-1/2 also build Cars Boats
Edition: Model Aviation - 1987/04
Page Numbers: 67, 163, 164, 165
Control Line Aerobatics Ted Fancher SAVED mailman Its two days after Christmas write Ive staring old word processor past half-hour trying conjure up something interest intrigue loyal Stunt fan having absolutely no luck coming up thing old computer no help until give something process As about write resignation frustration should appear over shoulder faithful coffee-cooker Nats com panion Shareen bearing days correspon dence promptly returned bills welcomed diversion letter dealing matters model-aeronautical author letter asking thoughts relative building biplane competitive Stunter Wow What great idea says Better yet what great solution lack material column Since subject will take short note address let body can either profit wisdom laugh ignorance Go ahead can take think person enjoys Aerobatics flies Control Line has time another considered slick would perform CL Stunt close-to-scale biplane know certainly have time built old Sterling Models Flying Fools basically sport biplane fairly smallbut symmetrically-alrfoiledwings seems Flying Fool aptly named fun fly left lot desired caine competition-level Stunt other hand same thing could said about some monoplane kits So maybe just designed right Lets answer obvious question first Yes think biplane could designed built competitive Could win Nats dont think no doubt mind right ship right hands could qualify flyoffs first important thing consider bipe DRAGin capital letters frontal area two wings substantially greater single equal area addition struts etc necessary mount upper wing must considered As know drag must overcome thrust olden days Fox 35s might have too much obstacle Today however have access abundant power form popular 60s both ST Merco current 60 ships could stand little drag anyhow just get slowed down can see First problem solved Plan using big mo-mo second problem also drag-related duced drag drag by-product producing lift fly corner given radius requires certain amount lift ie threepound airplane lOG corner must produce 30 lb lift drag produced developing lift can vary greatly depending almost entirely confignration wing/wings Long slender wings will develop very little drag given lift short stubby ones will develop lot true whether have wing dozen however another problem endemic multi-winged craft interference between upper lower wings total lift developed wings combination reduced pressure upper surface creased pressure bottom As can see reduce pressure top lower wing bipe also reduce pressure bottom upper wing Whoops good huh Continued page 163 Glen Alison driving force behind CLAPA British counterpart PAMPA builtthis lovelysemiscale StunterL ST 60 drives 13 x 5 prop haul Its 52 oz fine style Aces past present R Billy Suarez L best years past has returned fray compete todays best current National Champion Jimmy Casale R two beautiful ships Urtnowski photo Windy Urtnowski seemsto grind out endless number superbly-finished Stunters No nottwo photos same plane Look closely atthe white wing trim stabilizer placement left Relentless Greenaway/ST 60 power other R Overdog has 750 sq wing area weighs 62 oz Wing/fuel tank/engine come Big Jim Greenaway Urtnowskl pics April 1987 67 THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft Cars Boats Radios eSystems Engines Hardware Books eFinishing Materials Accessories Videos R/C Dealers Win $1 000 $500 $250 R/C Merchandise retailer choice eligible simply fill out return reader survey form issue RCBG 10th edition Winners will chosen random drawing Reader Survey participants local hobby shop does stock copies Guide please send request payment IS 10 plus postage/handflng 3 tec RadioContml Buyers Guide Clifton HouseClifton VA 22024 * You may use VISA Mautercard charge payment sending card number Cepiration date order cant expect output unless some form input input has come Scale modeler NASA now requesting input same columnists form photos building ideas contest reports rules problems gripes compliments can used newsletter now send material John Guenther RR#3 Box 261 Borden 1N47106 will see Stan gets FM team trials NASA now working upcoming team selection program urges interested Scale modelers West Coast East Coast make feelings known subject how/when/where trials should held Editors note Bill Boss could have known time wrote column Scale Team Selection Committee voted hold finals 1987 Nats siteLincoln NEon July 8-11 just prior start oftheNats RMcM John Guenther Team Selection Committee Chairman also looking modelers inter ested helping Scale judging chores both CL RC events NASA hopeful years program will produce some new faces new models perhaps team will emerge models fly well can also meet challenge static judging world competition last years team excel lent-flying models did team basis live up static judging challenge NASA-sponsored meet program Dale Arvin NASA VP has suggested NASA develop Scale meet program NASA would sponsor Scale meets AMA district events must FF CL RC Scale program would provide reimbursement AMA meet-sanction fee NASA provide Flight Achievement Award would bestowed along other troPhies awards provided meets primary sponsor Again full details latest effort NASA promote Scale modeling contact John Guenther address given few paragraphs above Well folks looks like NASA has taken several large steps its efforts representing organization Scale matters now up meet challenge respond ing Remember communication key word final analysis NASA can good representative Scale modeling community Scale modeler make Let NASA hear Please send correspondenceand espe ciallyphotosrelatingto CL Scale BillBoss 77-06 269 Street New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 67 usual solution space two wings least chord-width apart vertically have upper wing located somewhat forward lower Because plan operate Stunters fairly large angles attack would consider one-chord-width separation minimum might opt little extra good measure think good planform combat problems would two wings nearly equal size high aspect ratio ie span six seven times average chord upper wing would 1-times-the-average-chord higher lower both wings would approx imately equidistant vertically thrust line * *** MPROUED** * ~jgjj Plaid will mars wait Power * INoDes **WANDIT *U5Pster * *Dealers Irrotnd * yeUxIUrraTtYr 1 loft CORDJ * * torDry Stick Abrasive * *A Keen Machine gives exceptional *sanding control br excellent tinish * * 8ggg llaxrc mcI 1 hat Wand arid 1 * egnin *1 08gj Burlder Special 501 2 tIat 1 saltround wand axd 5 xl t grita *1 xe mxcuden 3 tIat 2 traIt Ixcnd * ndS 1 hull eands tO xl * grrts * Additional Wands Abrasives available * WANDIT MANUFACTURING 214 288-5789 * *PO Box 266 e Mesquite Texas 75149* April 1987 163 5105 Psroee*ucs sAss iAu5d555 cLissus Pass LIcSTCEIcST *LUC5U5 sassuacs *asS Yes PULL SIRS PUTTECsS IVOUC cesict 1LL5ST55Y55 P*eulcarIss *55 PLYInG lIST5UcVl5IS S. 5 5AC5 55 sIs PACK IPICS Sal 0 OGA 0 OGA Designs os OGA Designs o DGA Designs. OGA Designs 0 C C *DARNED GOOD AIRMEN Lightest weight Pilots Available 0 * FULL BODY PILOT KIT Lifelike Vinyl latex trbber parts Easy assenble ttnrsh Kt contains Pilot head hands boots helnnet cap goggles frill tenrplates easy instnnctions Fully positionable too.0 Height- WeighS- NEW Low PeSOS-0 0 No206 1/6 Scale lid8 2 oz S72 No20n tB Scale 14 30zs8c No20* 1/4 Scale l7~ 4oz s *BU5T PILOT KIT rtteoe amyt atc,tayO Bolt[tI 5 No203 —13 Scale 23t8 60z st6 SPORTSMAN ot BARNSTORSoISB-FULL BOOT BUST St Socrates Pilot Bead flettaret aBort cop daddies atd Jacket. . Easy asaCCtbte tntsh CHeight- WeIght- Low prlees0 jetdNo100thOhitCaladdOeh5Qh5 ONo 100 -t hBhaIed70tiaCe 5No ted -ld BCdIOd3 8ti aptS*some01 No OS tdBooIe5352-I dotsl4Z Slttipte5 00*1895 rgtiltOd 50 S .. AotOrondieg realise ottoingblO plOOtlOO.. 0 ODoe yet eoleme light weight Oat cantyiCtad 11 cody Bttat CStats 011 hdae little ca etteot halmttClt hatt atCtdlt -0 0Send slOO Catalog 5 0 New VoltS stole Residents dad ph sates leo. 50011 Check MO. coos AtIots 3 weeks tot Cheek Clear 15 DGA Designs 00 DGA 0 DGA Designs avoid having drag wings affect inside versus outside turn equality would sweep upper wing back little sake appearance locate about quarter third chord forward lower wing average chord would also consider using no 12%-thick airfoil reasons too lengthy now No big deal want use thickness big should wings ask Good question Shouldyou use flaps Another good question Area should based weight assume upper limit 13 ounces per square foot area acceptable competitive flying. do. should based predicted weight Although Ive seen 60 ships heavy 80 oz fly well would prefer limit bipe no 70 again because drag going greater 70-oz ship 13 oz/sq ft wing loading works outto 775 sq m Ive got real problem flaps Because high-aspect-ratio wing dont really think would necessary lift Since bipe has inherent drag also question desirability increased drag caused flaps other hand would really make nervous build Stunter balance think would cross fingers go flaps choose use both wings Couple lower flaps usual bellcrank elevators tie upper flaps lower vertical pushrods trailing edge about halfway out really dIstInctIve things about fullscale bipes short stubby fuselages especially special Aerobatic types such Pitta Christen Eagle Unfortunately such configuration isnt appropriate use short coupling full-size bipes primarily enhancing snap rolls dont snap rolls What some very abrupt pitch changes require impressive amounts tail author ity requires long tail moments large tail feathers stab elevator together should roughiy 16% 18% total wing area no flaps used much 22% use flaps Thats correct bigger tail necessary flaps Check series design ran May-October 1985 issues discussion pitching moment duced flaps tail moment tough define Since biplane configuration differs much normal Stunter becomes impossible use accepted hinge line-to-hinge line measurement what would Looking directly down top ship measure jthe distance leading edge upper wing trailing edge lower halfway out span either wing tapers upper wing swept Lets call average chord both wings Now take 25% number locate spot far aft upper leading edge comes educated guess Multiply first number average chord both wings 20 using no flaps 22 using flaps Plot distance aft 25% location previously noted locate hinge line stab/elevator point number derived Nats-winning Citation V may may final word biplanes never said first would perfect did length nose willbe toughest problems Ideally should long enough 164 Model Aviation THE JOURNAL OFJOURIIAL THE AIRPLANE 1920 1940TItE EARLY AEROPLAINE Leo Opdycke EditorKenn Rust Editor WW1 AERO 1 900-1 91 9 SKYWAYS 1 9201940 two Journals contain information current projects historical research news museums airshows workshop notes technical drawings data information paint color photographs aeroplanes engines parts sale O scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies 54 Published WORLD WAR 1 G #pnat~ INC t5 Crcscertt Road Pottqhkccpste NY 12601 USA 914 473-5679 RADIO SOUTH ufum. 43 W Nine Mile Rd Pensacola FL 32514 Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 4BV1875 Futaba conn2150 1200 ma Pack 48V1975 Futeba conn2250 TX batt Futaba 0-series orPCM2250 Os OS 25 FP 4250 OS 25 FSR 5750 OS 4OFP 4950 OS 4OFSR 8350 OS 2OFC 8950 OS4OFC 10950 0S61 FC 14350 OS9OFC 17250 Alse Carry ACE Field Charger Chargemaster Dual Charger 12 V Charger Voitmaster Tachmaster 4-20 Kit 4-40 Kit 4-60 Kit 3450 3950 3950 2750 2750 3150 3350 4150 5550 FUTABA FP-2NL5700 FP-2PKA-S289000 FP-4NL-S3810700 FP-4NL-S3312200 FP-6NLK AM16400 FP-6NLK FM18400 FP-SNLP PCM22400 FP-8SGA PCM 47900 FP-8SSA PCM 59900 Boki berg Delia MAC Zin go, K & B Rocket City Dave Brown anal I,NCII mit Orders COD VISA MC ge actual UPS charges OPEN 10-6 EST 904 478-6745 Nohandlingcharges es subject change notice Complete Futaba Repair Center balance rest airplane adding useless weight shorter better estimation recognize heavier tend build longer should Again classic measurement leading edge-to-spinner-backplate useless because two wings tendency will make short again like full-scale biplanes Resist temptation make slightly shorter normal Stunter pretty much takes care planform What else has considered 1 Center Gravity should located conventionally except must consider both wings Based once again average chord both wings determined figuring tall moments plan location 16% 20% flaps slightly forward say 12% 15% no flaps 2 Belicrank location ensure biplane flies straight off lines vertical location bellcrank must closely approxi mate vertical location center gravity Unfortunately means must mounted fuselage between upper lower wings lead-outs must exit fuselage supported guide mounted interwing strut inboard side flight circle An eyeball guess mass involved would strongly suggest bellcrank placed slightly below thrust line suming thrust line located sug gested midway between two wings Its foreand-aft location less critical should closv CG usual reasons lead-outs should conventionally swept about three degrees aft CG sure support inter-wing strut allow usual adjustment range should about wont perfect first time what might wondering will add up competitive Stunter dont think can win Nats Fair question optimize planform wings reduce interference induced drag minimum ratio drag lift will still exceed pure monoplane Stunter addition no way know build two wings light same area As result will take exceptional building skills achieve com petitive wing loadings Still have seen some pretty rudi mentary biplanes complete Stunt pattern knows Perhaps could done have wrong before Go Tom Dixon has announced availability special production run Merco 61 Stunt en gines engines feature dual piston rings excellent compression seal glow plug lo cated rear cylinder ensure smooth ignition engines come Merco Standard Silencer CL venturi Anyone witnessed well Toms 61 ran 86 Nats couldnt help interested having copy himself Full parts backnp service available through Tom other Merco engines information write Tom Dixon Suite 401 1938 Peachtree Road NW Atlanta GA 30309 same vein received notification Doc Passen US representative Cipolla Model Engines actively considering production ofalightweight plain-bearing CL 35 aimed Control Line Stunt info get Bye now Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Navy Carrier/Perry Continued page 68 anything Profile models weigh 28 oz less Line Construction four line terminations shown photo legal commercial crimps have either three two lengths wire through crimped sleeve rule book dia gram crimped-sleeve line construction probably based commercial practice better method recommended Remember FLYLINE MODELS INC P 0 Ba 2136 Farfos Vrrgna 22031 U S •cI April 1987165 A Classic R/C ScaleLAK TH O Wing 15 25 Engines Dealers ributors Weicomed Phone 703 273-9593 IEAST Tony Frackowiaks Challenge IV Kit Hattori Pipes Headers ASANO Laminated wood props RC Acrobatic Specialists PO Box 388914-248-8603 Lincolndale NY 10540 Send $100 catalog Puzzled CALL MATT No time build Melt Ill hove time. ead knew 1 Complete 2 Semi-Assembled reedy cover sandedi ca 9am- 8pm lEST 6093951672 Send prices Kits Engines accessories 9D Mitts Model Building P0 Box 49 1 Stockton Drive Crenhury NJ 06512 Rate cards available free SASE 4-118s 9-1/2 also build Cars Boats
Edition: Model Aviation - 1987/04
Page Numbers: 67, 163, 164, 165
Control Line Aerobatics Ted Fancher SAVED mailman Its two days after Christmas write Ive staring old word processor past half-hour trying conjure up something interest intrigue loyal Stunt fan having absolutely no luck coming up thing old computer no help until give something process As about write resignation frustration should appear over shoulder faithful coffee-cooker Nats com panion Shareen bearing days correspon dence promptly returned bills welcomed diversion letter dealing matters model-aeronautical author letter asking thoughts relative building biplane competitive Stunter Wow What great idea says Better yet what great solution lack material column Since subject will take short note address let body can either profit wisdom laugh ignorance Go ahead can take think person enjoys Aerobatics flies Control Line has time another considered slick would perform CL Stunt close-to-scale biplane know certainly have time built old Sterling Models Flying Fools basically sport biplane fairly smallbut symmetrically-alrfoiledwings seems Flying Fool aptly named fun fly left lot desired caine competition-level Stunt other hand same thing could said about some monoplane kits So maybe just designed right Lets answer obvious question first Yes think biplane could designed built competitive Could win Nats dont think no doubt mind right ship right hands could qualify flyoffs first important thing consider bipe DRAGin capital letters frontal area two wings substantially greater single equal area addition struts etc necessary mount upper wing must considered As know drag must overcome thrust olden days Fox 35s might have too much obstacle Today however have access abundant power form popular 60s both ST Merco current 60 ships could stand little drag anyhow just get slowed down can see First problem solved Plan using big mo-mo second problem also drag-related duced drag drag by-product producing lift fly corner given radius requires certain amount lift ie threepound airplane lOG corner must produce 30 lb lift drag produced developing lift can vary greatly depending almost entirely confignration wing/wings Long slender wings will develop very little drag given lift short stubby ones will develop lot true whether have wing dozen however another problem endemic multi-winged craft interference between upper lower wings total lift developed wings combination reduced pressure upper surface creased pressure bottom As can see reduce pressure top lower wing bipe also reduce pressure bottom upper wing Whoops good huh Continued page 163 Glen Alison driving force behind CLAPA British counterpart PAMPA builtthis lovelysemiscale StunterL ST 60 drives 13 x 5 prop haul Its 52 oz fine style Aces past present R Billy Suarez L best years past has returned fray compete todays best current National Champion Jimmy Casale R two beautiful ships Urtnowski photo Windy Urtnowski seemsto grind out endless number superbly-finished Stunters No nottwo photos same plane Look closely atthe white wing trim stabilizer placement left Relentless Greenaway/ST 60 power other R Overdog has 750 sq wing area weighs 62 oz Wing/fuel tank/engine come Big Jim Greenaway Urtnowskl pics April 1987 67 THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft Cars Boats Radios eSystems Engines Hardware Books eFinishing Materials Accessories Videos R/C Dealers Win $1 000 $500 $250 R/C Merchandise retailer choice eligible simply fill out return reader survey form issue RCBG 10th edition Winners will chosen random drawing Reader Survey participants local hobby shop does stock copies Guide please send request payment IS 10 plus postage/handflng 3 tec RadioContml Buyers Guide Clifton HouseClifton VA 22024 * You may use VISA Mautercard charge payment sending card number Cepiration date order cant expect output unless some form input input has come Scale modeler NASA now requesting input same columnists form photos building ideas contest reports rules problems gripes compliments can used newsletter now send material John Guenther RR#3 Box 261 Borden 1N47106 will see Stan gets FM team trials NASA now working upcoming team selection program urges interested Scale modelers West Coast East Coast make feelings known subject how/when/where trials should held Editors note Bill Boss could have known time wrote column Scale Team Selection Committee voted hold finals 1987 Nats siteLincoln NEon July 8-11 just prior start oftheNats RMcM John Guenther Team Selection Committee Chairman also looking modelers inter ested helping Scale judging chores both CL RC events NASA hopeful years program will produce some new faces new models perhaps team will emerge models fly well can also meet challenge static judging world competition last years team excel lent-flying models did team basis live up static judging challenge NASA-sponsored meet program Dale Arvin NASA VP has suggested NASA develop Scale meet program NASA would sponsor Scale meets AMA district events must FF CL RC Scale program would provide reimbursement AMA meet-sanction fee NASA provide Flight Achievement Award would bestowed along other troPhies awards provided meets primary sponsor Again full details latest effort NASA promote Scale modeling contact John Guenther address given few paragraphs above Well folks looks like NASA has taken several large steps its efforts representing organization Scale matters now up meet challenge respond ing Remember communication key word final analysis NASA can good representative Scale modeling community Scale modeler make Let NASA hear Please send correspondenceand espe ciallyphotosrelatingto CL Scale BillBoss 77-06 269 Street New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 67 usual solution space two wings least chord-width apart vertically have upper wing located somewhat forward lower Because plan operate Stunters fairly large angles attack would consider one-chord-width separation minimum might opt little extra good measure think good planform combat problems would two wings nearly equal size high aspect ratio ie span six seven times average chord upper wing would 1-times-the-average-chord higher lower both wings would approx imately equidistant vertically thrust line * *** MPROUED** * ~jgjj Plaid will mars wait Power * INoDes **WANDIT *U5Pster * *Dealers Irrotnd * yeUxIUrraTtYr 1 loft CORDJ * * torDry Stick Abrasive * *A Keen Machine gives exceptional *sanding control br excellent tinish * * 8ggg llaxrc mcI 1 hat Wand arid 1 * egnin *1 08gj Burlder Special 501 2 tIat 1 saltround wand axd 5 xl t grita *1 xe mxcuden 3 tIat 2 traIt Ixcnd * ndS 1 hull eands tO xl * grrts * Additional Wands Abrasives available * WANDIT MANUFACTURING 214 288-5789 * *PO Box 266 e Mesquite Texas 75149* April 1987 163 5105 Psroee*ucs sAss iAu5d555 cLissus Pass LIcSTCEIcST *LUC5U5 sassuacs *asS Yes PULL SIRS PUTTECsS IVOUC cesict 1LL5ST55Y55 P*eulcarIss *55 PLYInG lIST5UcVl5IS S. 5 5AC5 55 sIs PACK IPICS Sal 0 OGA 0 OGA Designs os OGA Designs o DGA Designs. OGA Designs 0 C C *DARNED GOOD AIRMEN Lightest weight Pilots Available 0 * FULL BODY PILOT KIT Lifelike Vinyl latex trbber parts Easy assenble ttnrsh Kt contains Pilot head hands boots helnnet cap goggles frill tenrplates easy instnnctions Fully positionable too.0 Height- WeighS- NEW Low PeSOS-0 0 No206 1/6 Scale lid8 2 oz S72 No20n tB Scale 14 30zs8c No20* 1/4 Scale l7~ 4oz s *BU5T PILOT KIT rtteoe amyt atc,tayO Bolt[tI 5 No203 —13 Scale 23t8 60z st6 SPORTSMAN ot BARNSTORSoISB-FULL BOOT BUST St Socrates Pilot Bead flettaret aBort cop daddies atd Jacket. . Easy asaCCtbte tntsh CHeight- WeIght- Low prlees0 jetdNo100thOhitCaladdOeh5Qh5 ONo 100 -t hBhaIed70tiaCe 5No ted -ld BCdIOd3 8ti aptS*some01 No OS tdBooIe5352-I dotsl4Z Slttipte5 00*1895 rgtiltOd 50 S .. AotOrondieg realise ottoingblO plOOtlOO.. 0 ODoe yet eoleme light weight Oat cantyiCtad 11 cody Bttat CStats 011 hdae little ca etteot halmttClt hatt atCtdlt -0 0Send slOO Catalog 5 0 New VoltS stole Residents dad ph sates leo. 50011 Check MO. coos AtIots 3 weeks tot Cheek Clear 15 DGA Designs 00 DGA 0 DGA Designs avoid having drag wings affect inside versus outside turn equality would sweep upper wing back little sake appearance locate about quarter third chord forward lower wing average chord would also consider using no 12%-thick airfoil reasons too lengthy now No big deal want use thickness big should wings ask Good question Shouldyou use flaps Another good question Area should based weight assume upper limit 13 ounces per square foot area acceptable competitive flying. do. should based predicted weight Although Ive seen 60 ships heavy 80 oz fly well would prefer limit bipe no 70 again because drag going greater 70-oz ship 13 oz/sq ft wing loading works outto 775 sq m Ive got real problem flaps Because high-aspect-ratio wing dont really think would necessary lift Since bipe has inherent drag also question desirability increased drag caused flaps other hand would really make nervous build Stunter balance think would cross fingers go flaps choose use both wings Couple lower flaps usual bellcrank elevators tie upper flaps lower vertical pushrods trailing edge about halfway out really dIstInctIve things about fullscale bipes short stubby fuselages especially special Aerobatic types such Pitta Christen Eagle Unfortunately such configuration isnt appropriate use short coupling full-size bipes primarily enhancing snap rolls dont snap rolls What some very abrupt pitch changes require impressive amounts tail author ity requires long tail moments large tail feathers stab elevator together should roughiy 16% 18% total wing area no flaps used much 22% use flaps Thats correct bigger tail necessary flaps Check series design ran May-October 1985 issues discussion pitching moment duced flaps tail moment tough define Since biplane configuration differs much normal Stunter becomes impossible use accepted hinge line-to-hinge line measurement what would Looking directly down top ship measure jthe distance leading edge upper wing trailing edge lower halfway out span either wing tapers upper wing swept Lets call average chord both wings Now take 25% number locate spot far aft upper leading edge comes educated guess Multiply first number average chord both wings 20 using no flaps 22 using flaps Plot distance aft 25% location previously noted locate hinge line stab/elevator point number derived Nats-winning Citation V may may final word biplanes never said first would perfect did length nose willbe toughest problems Ideally should long enough 164 Model Aviation THE JOURNAL OFJOURIIAL THE AIRPLANE 1920 1940TItE EARLY AEROPLAINE Leo Opdycke EditorKenn Rust Editor WW1 AERO 1 900-1 91 9 SKYWAYS 1 9201940 two Journals contain information current projects historical research news museums airshows workshop notes technical drawings data information paint color photographs aeroplanes engines parts sale O scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies 54 Published WORLD WAR 1 G #pnat~ INC t5 Crcscertt Road Pottqhkccpste NY 12601 USA 914 473-5679 RADIO SOUTH ufum. 43 W Nine Mile Rd Pensacola FL 32514 Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 4BV1875 Futaba conn2150 1200 ma Pack 48V1975 Futeba conn2250 TX batt Futaba 0-series orPCM2250 Os OS 25 FP 4250 OS 25 FSR 5750 OS 4OFP 4950 OS 4OFSR 8350 OS 2OFC 8950 OS4OFC 10950 0S61 FC 14350 OS9OFC 17250 Alse Carry ACE Field Charger Chargemaster Dual Charger 12 V Charger Voitmaster Tachmaster 4-20 Kit 4-40 Kit 4-60 Kit 3450 3950 3950 2750 2750 3150 3350 4150 5550 FUTABA FP-2NL5700 FP-2PKA-S289000 FP-4NL-S3810700 FP-4NL-S3312200 FP-6NLK AM16400 FP-6NLK FM18400 FP-SNLP PCM22400 FP-8SGA PCM 47900 FP-8SSA PCM 59900 Boki berg Delia MAC Zin go, K & B Rocket City Dave Brown anal I,NCII mit Orders COD VISA MC ge actual UPS charges OPEN 10-6 EST 904 478-6745 Nohandlingcharges es subject change notice Complete Futaba Repair Center balance rest airplane adding useless weight shorter better estimation recognize heavier tend build longer should Again classic measurement leading edge-to-spinner-backplate useless because two wings tendency will make short again like full-scale biplanes Resist temptation make slightly shorter normal Stunter pretty much takes care planform What else has considered 1 Center Gravity should located conventionally except must consider both wings Based once again average chord both wings determined figuring tall moments plan location 16% 20% flaps slightly forward say 12% 15% no flaps 2 Belicrank location ensure biplane flies straight off lines vertical location bellcrank must closely approxi mate vertical location center gravity Unfortunately means must mounted fuselage between upper lower wings lead-outs must exit fuselage supported guide mounted interwing strut inboard side flight circle An eyeball guess mass involved would strongly suggest bellcrank placed slightly below thrust line suming thrust line located sug gested midway between two wings Its foreand-aft location less critical should closv CG usual reasons lead-outs should conventionally swept about three degrees aft CG sure support inter-wing strut allow usual adjustment range should about wont perfect first time what might wondering will add up competitive Stunter dont think can win Nats Fair question optimize planform wings reduce interference induced drag minimum ratio drag lift will still exceed pure monoplane Stunter addition no way know build two wings light same area As result will take exceptional building skills achieve com petitive wing loadings Still have seen some pretty rudi mentary biplanes complete Stunt pattern knows Perhaps could done have wrong before Go Tom Dixon has announced availability special production run Merco 61 Stunt en gines engines feature dual piston rings excellent compression seal glow plug lo cated rear cylinder ensure smooth ignition engines come Merco Standard Silencer CL venturi Anyone witnessed well Toms 61 ran 86 Nats couldnt help interested having copy himself Full parts backnp service available through Tom other Merco engines information write Tom Dixon Suite 401 1938 Peachtree Road NW Atlanta GA 30309 same vein received notification Doc Passen US representative Cipolla Model Engines actively considering production ofalightweight plain-bearing CL 35 aimed Control Line Stunt info get Bye now Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Navy Carrier/Perry Continued page 68 anything Profile models weigh 28 oz less Line Construction four line terminations shown photo legal commercial crimps have either three two lengths wire through crimped sleeve rule book dia gram crimped-sleeve line construction probably based commercial practice better method recommended Remember FLYLINE MODELS INC P 0 Ba 2136 Farfos Vrrgna 22031 U S •cI April 1987165 A Classic R/C ScaleLAK TH O Wing 15 25 Engines Dealers ributors Weicomed Phone 703 273-9593 IEAST Tony Frackowiaks Challenge IV Kit Hattori Pipes Headers ASANO Laminated wood props RC Acrobatic Specialists PO Box 388914-248-8603 Lincolndale NY 10540 Send $100 catalog Puzzled CALL MATT No time build Melt Ill hove time. ead knew 1 Complete 2 Semi-Assembled reedy cover sandedi ca 9am- 8pm lEST 6093951672 Send prices Kits Engines accessories 9D Mitts Model Building P0 Box 49 1 Stockton Drive Crenhury NJ 06512 Rate cards available free SASE 4-118s 9-1/2 also build Cars Boats