Aerobalics El Wynn Paul SEMI-SCALE STUNT planes have important part scene since first Nationals 1946 Ralph Roof won Open Stunt flying six-foot Taylorcraft Forester 99 up front course stunt pattern quite different featuring such maneuvers wheel touch ing 7 points stall recovery 8 glider pick up 10 laying smoke screen 3 rolls 35 flying two planes once 7 Weve come long way molded balsa fuselage foam wing polyester finish multiple adjustable features todays semi-scale stunters favorite semi-scales Bearcat have least four excellent ones Al Rabes Jim Lynchs Ron Hardings Mike Wag ners Als article appeared AAM March 1970 molded balsa fuselage must plane weighs 55 oz youre trouble difficult plane build certainly impressive flight Al Jim suggest some changes basic model shown AA M can obtain specs changes two modelers word requesting information know top fliers get numerous requests help information tips etc Some modelers very cooperative taking time effort answer letter Others answer requests However modelers search assistance should realize answering letter re quest takes time Requests should spe cific form mini-question naire space provided answer Always provide self-addressed stamped return envelope postcard much easier people fill out ques tionnaire-type letter slip stamped return envelope likely receive answer F-S 1 probably common semi-scale Rabe Bill Rutherford have versions very competitive host other fliers trying P-Si Wing loading can get out hand easily planes have careful origi nal Mustang Rabe AAM June 1969 again model has up dated Al Bill Al Meyers 666 Orr St Joliet IL 60436 has plans available competitive version want reasonably light wing loading bet ter build scratch Bearcat Mustang would good subjects Atlanta Stunt Conspiracy plans similar Gieseke Nobler available Perhaps Rabe Rutherford Lynch Harding could send drawings Tom Dixon possible publi cation According index have least 50 semi-scale stunt ships magazines since 1960 trick ob tain magazine article plans Ill discuss some other possibilities below have several Stukas over years Don Stills original 48-in contender would make good 35-powered stunter cause its small size plane sev eral others still available Hobby Helpers 1543 StilIwell Ave Bronx NY 10451 Also available same source Frank Warburtons Tony 57-in span probably should have 5T46 instead listed 35 Charles Mackeys Mark Spitfire 57-in span Arch Adamisin also Tony stunter 35 size foam wing Plans available RC Sportsman P0 Box 11247 Reno NV 89510 MAN good 3-view Tony June 1966 French Dewoitine D-520 should make good semi-scale ship Art Adami sin Kent Rogers good exam ples craft 35 46 size re spectively No plans available Profile series no 135 good start advanced modeler An airplane certainly lends itself stunt configuration Keith Trostles Continued page 92 36 Model Aviation Pleasant lines distinguish Ron Rays Javelin Powered Enya 35 equipped uni flow tank Civilian-type pilot figure pit Bearcats forever Great piston-engine fighter perennial favorite Ron Hardings flashy look- World Trophy awarded Les McDonald ing rendition powered ST 46 friends Orange Blossom Hobby Shop Miami Speaking subjects never diestunt radio CL scalethe P51 Mustang must popular WW II subjects semi-scale Al Meyers has 54-in span ST 40 ATTENTION ALL AMA CLUBS Need Working Capital Earn $2000 0 next contest EASY WAY complete docket send $995 plus 50 cents postage Godfrey & Son Inc 254 Washington St Binghamton NV 13901 THE BIG HIs AM CCOMING dont work well too thin break finish blade few coats plasticized nitrate dope dont fill grain wood turbulator does work keeps prop pulling slower portion power run winding loop made solid heat-treated aluminum may ordered Jim Crocket Flying No 8 designed fly right un der power glide left glide right recommended because have never plane design fly well right glide Tape ballast motor tube ballast consists lead weight making up difference between weight plane 190 grams location plane balances shown plan Glide plane over soft area dont have tall grass live just cactus sagebrush Put shims under stab until plane glides Adjust rudder tabs get wide left turn Wind about 50 turns gently launch straight ahead Make thrust adjustments get moderate too steep right turn pow er climb pattern should straight steep first turning right tightening power decreases near end power run rudders turn plane left glide can tighten glide turn after climb correct use 16 strands strong Pirelli wind 330 340 turns fully wound motor should have 110 120 in/oz torque FAI rubber use 14 strands wind about 310 320 turns should give torque 120 130 in/oz should mention factors consider winding motors maximum rubber must well broken test wound find out actual breaking point takes place wind winding tube protect plane help remove broken motors motor tube will stand broken motor difficult remove shock other parts also lessened motor tube Flying Wakefield both joy frustration above unend ing challenge never easy make good flight As things life difficult task greater reward CL Aerobatics/Paul continued page 36 Focke Wuif TA-152 first appeared MAN Dec 1968 Originally set up 35 Keith built new 1976 about same size ST 46 flew quite well picture plane appeared Nov 76 Nats report Model via tion German Me-109 can built top bottom blocks rather molded balsa evidenced Jack Sheeks two versions 35 size FM April 1970 46 size FM May 1977 trike gear could try Bill Si mons P-39 FM August 1968 35-size airplane Both Lew Woolard Charlie Reeves have flown P-39s success Woolard quali fied 72 Nats Two Hawker Typhoons have appeared over years Dennis Adamisin won Ju nior 69 Nats got third Senior 70 35 version appeared AM September 1970 now available RC Sportsman Steve Ashby 46-size Typhoon FM January 1976 writer Seafang F 31/32 final version WW-II Spit fire look closely Bruce Robert sons book Spitfire will see good choice semi-scale has adequate nose length laminar-flow non-elliptical wing enlarged tailplane air scoop under engine wide landing gear placement Unfortunately came out very heavy very warped got very scattered around runway 73 Nats However still think would good semi-scale plane Another favorite warbird would Martin-Baker 5 looks rather like Mustang stretched nose Frank Mc Millan started apparently never completed Ive never seen Zero competition Bernie Ash sent picture Don Ogran Indianapolis way back 1961 campaigned several years like find just little diffi cult watch WW-II fighter plane doing square-eights F-14 Tomcat doing tri angles might try Dennis Duvalls Miss Dara 35-powered pylon racer ap peared FM December 1973 Tom Dixon developed Stephens Akro AAM March 1975 fullscale aerobatics airplane Use ST 46 does Jon Ramsden order plans RC Sportsman Speaking Akros Lew McFarlands Akromaster AAM November 1974 plans also available same source one-of-a-kind prototype campaigned Lew several years finishing high fourth 72 Nats Speaking real thing have Jim Van Loo s version Hal Kriers Chip munk appeared MAN March 1968 35 40 engines 55-in wing course ship later evolved Sig Chipmunk dandy kit built correctly Pete Tindals 40-size Chipmonk Model Aviation April 1977 57-in wing should fly well use ST 46 engine Lew McFarland built beautiful Chipmunk McCoy 40 never got around flying much looked great air Some planes have left out because plans available could get magazine article work Dave Hemstroughts PT-19 AM Febru ary 1960 Lew McFarlands Vega 35 AM June 1962 Aldrichs AG-l Duster MAN August 1966 Jack Sheeks Spit fire Mk FM September 1968 course Sea Fury Al Rabe AAM March 1973 Al suggests no try because its difficult build Well list few could de veloped competitive stunt planes can obtain old magazine adapt plans contemporary design Mac chi 202 FM October 1974 plans avail92 Model Aviation product review product review product review New K & B Engines addition 7 new airplane engines ranging size 325cc 65cc K & Bs line now totals 16 airplane 4 marine engines seven new engines 325cc 19 front rotor 35cc 21 front rotor 49cc 29 58cc 35 front rotorall F F CL 35 RIO Sport 65 RIO 40 front rotor Perry carburetor 65cc 40 front rotorfor FF Pylon Total line 20 engines provides range sizes types powerplant demand available dealers K & B Manufacturing 12152 Woodruff Ave Downey CA 90241 product review product review product review iew product review product review CoxlSanwa Single Stick Conversion As comes manufacturer transmit ter provides two functions two single-axis stickswhich fine because beginner learns configuration may have problem moves up 4-channel fly ing looks help because has learned differently way ROers fly Ace offers conversion package consists new vinyl-clad case Dunham open-gim bal stick assembly two-stick owner can convert Complete instructions Price $1895 Ace RIC Box 511 116 W 19th St Higgineville MO 64037 product review product review product review able Flying Models P-26 Pea Shoot er FM March 1974 plans FM Hurricane FM August 1972 Skyraider FM March 1972Bill Werwage sup posed have very good flying tucked away basement Shoe string FM September 1971 Midget Mustang MAN October 1968 Bellanca Super Viking MAN October 1969 Ryan S-T AM July 1962 Bonzo AM November/December 1964 few sources old maga zines Bills Mail Order Hobby 503 West Astor Lees Summit MO 64063 bodys Bookshop 317 W 6th St Los Angeles CA 90014 Mal MacLean 6 Larry Dr Commack NY 11725 David Braun 5670 Ensenada Way Meca #436 Riverside CA 92504 Modelers everywhere express sym pathy Bob Gieseke children upon learning death wife Anna Mae drowning accident vacation Acapulco Mexico early March information stunt PA MPA Wynn Paul 1640 Maywick Dr Lex KY 40504 Th SPORTSTER 39 span 049 power op 3nhomets rio great sport t930s $1295 FAtRctfiLD 22 48 Wingspanperce 09 to25 Poweromouced 3Chonnet #ic *107 qw VA SESICCOOS Ann AS TAOCAC 10% FOR PACKISA *00 POSTAGE see local hobby dealer AMORICAN CLASStCS worlds finest models Send br tree brochAre Aristocrat Sceanc3 FAC SCOW COG PALRE WIASSE SI WISASPMI ASS POSER FOR V11255SAOOCOETSOL UP TO 01050 5A WIPASPAS 00 POt..COCSAELIATRCC CLASSIC AR FOR RAAIO COSTRAL OS FREE FLIOIITCRAFT FROG 01W SOLOES ESA B EL LA NCA OUNSCA OCA OR 00K POWER #101* #102tel 703 2739593 35 WIRASFAS 02C POWER FOR PULSE ANE WALL 2AALTI-RAAIO LYLINE MODELS 0643 ASFIBY PL FAIRFAX VA 22030 FF Scale/Kuenz continued page 43 bottom Also look weight savings Obviously wing J3 would need two 1/16 sq string ers because struts would provide strength maintain alignment reason need strength control old bugaboo warps strong wing will resist warping will hold warps needed trim Well talk about later about wing tips Throw away parts look like jigsaw puzzle replace laminated wing tips De cide right now bite bullet making proper form constructing laminated wing tips three advantages laminated wing tips much stronger 2 lighter 3 can easily assembled provide tip dihedral Use laminations much possible Stab Construction First off look size stab prints stab span isnt about same distance fuselage side wing tip stab area may too small Redraw layout retaining its distinctive outline very difficult trim around too small stab especially outside Also look curved outlines stab shoull made up laminations just like wing tips nothing like laminated stab outlines keep weight mini mum critical STAB OPENING STAB THICKNESS TACK GLUE STAB HERE ONLY WHILE TRIMMING FROM STAB PLATES MAKE SHEET BALSA WITH SLOT CUT 30 STAB THICKNESS ASSEMBLE BETWhN STRINGERS 2 METHODS OF MOUNTING STAB IN BIFFEREUT FUSELAGES STAB PLATE SHOWING POSITION OF STAB AND ROOM FOR ALTERING INCIDENCE stab mounted fuse lage Alter construction allow stab shimmed through range 4 6 degrees stab fits slot widen slot about three times thick ness stab Tack glue stab leading trailing edge allow ease adjustment during trim flights After model trimmed fill open areas wood tissue over Rudder Under circumstances scale rudder outline sufficient direc tional stability except some cases bi planes radial rotary engined largefuselage models seems types especially trimmed mod erately high climb very little slipstream gets rudder therefore little directional stability model falls category may need taller rudder careful too much rudder just bad since can make wing dihedral less effective keeping model turn may become spiral dive di hedral able return model normal flight Rudder construction should follow methods used stab Use laminations much possible keep strength up weight down Incorporate changes next scale model Ill guarantee wont product review product review product review REL OfScOFWCT 10 FLL Leakproof Fuel Manifold mounted tween tank engine manifold pro vides convenient method tank filling draining engine priming $ 95 Fourmost Racing Products 4040 24th Ave Forest Grove OR 97116 product review product review product review July1977 93
Edition: Model Aviation - 1977/07
Page Numbers: 36, 92, 93
Aerobalics El Wynn Paul SEMI-SCALE STUNT planes have important part scene since first Nationals 1946 Ralph Roof won Open Stunt flying six-foot Taylorcraft Forester 99 up front course stunt pattern quite different featuring such maneuvers wheel touch ing 7 points stall recovery 8 glider pick up 10 laying smoke screen 3 rolls 35 flying two planes once 7 Weve come long way molded balsa fuselage foam wing polyester finish multiple adjustable features todays semi-scale stunters favorite semi-scales Bearcat have least four excellent ones Al Rabes Jim Lynchs Ron Hardings Mike Wag ners Als article appeared AAM March 1970 molded balsa fuselage must plane weighs 55 oz youre trouble difficult plane build certainly impressive flight Al Jim suggest some changes basic model shown AA M can obtain specs changes two modelers word requesting information know top fliers get numerous requests help information tips etc Some modelers very cooperative taking time effort answer letter Others answer requests However modelers search assistance should realize answering letter re quest takes time Requests should spe cific form mini-question naire space provided answer Always provide self-addressed stamped return envelope postcard much easier people fill out ques tionnaire-type letter slip stamped return envelope likely receive answer F-S 1 probably common semi-scale Rabe Bill Rutherford have versions very competitive host other fliers trying P-Si Wing loading can get out hand easily planes have careful origi nal Mustang Rabe AAM June 1969 again model has up dated Al Bill Al Meyers 666 Orr St Joliet IL 60436 has plans available competitive version want reasonably light wing loading bet ter build scratch Bearcat Mustang would good subjects Atlanta Stunt Conspiracy plans similar Gieseke Nobler available Perhaps Rabe Rutherford Lynch Harding could send drawings Tom Dixon possible publi cation According index have least 50 semi-scale stunt ships magazines since 1960 trick ob tain magazine article plans Ill discuss some other possibilities below have several Stukas over years Don Stills original 48-in contender would make good 35-powered stunter cause its small size plane sev eral others still available Hobby Helpers 1543 StilIwell Ave Bronx NY 10451 Also available same source Frank Warburtons Tony 57-in span probably should have 5T46 instead listed 35 Charles Mackeys Mark Spitfire 57-in span Arch Adamisin also Tony stunter 35 size foam wing Plans available RC Sportsman P0 Box 11247 Reno NV 89510 MAN good 3-view Tony June 1966 French Dewoitine D-520 should make good semi-scale ship Art Adami sin Kent Rogers good exam ples craft 35 46 size re spectively No plans available Profile series no 135 good start advanced modeler An airplane certainly lends itself stunt configuration Keith Trostles Continued page 92 36 Model Aviation Pleasant lines distinguish Ron Rays Javelin Powered Enya 35 equipped uni flow tank Civilian-type pilot figure pit Bearcats forever Great piston-engine fighter perennial favorite Ron Hardings flashy look- World Trophy awarded Les McDonald ing rendition powered ST 46 friends Orange Blossom Hobby Shop Miami Speaking subjects never diestunt radio CL scalethe P51 Mustang must popular WW II subjects semi-scale Al Meyers has 54-in span ST 40 ATTENTION ALL AMA CLUBS Need Working Capital Earn $2000 0 next contest EASY WAY complete docket send $995 plus 50 cents postage Godfrey & Son Inc 254 Washington St Binghamton NV 13901 THE BIG HIs AM CCOMING dont work well too thin break finish blade few coats plasticized nitrate dope dont fill grain wood turbulator does work keeps prop pulling slower portion power run winding loop made solid heat-treated aluminum may ordered Jim Crocket Flying No 8 designed fly right un der power glide left glide right recommended because have never plane design fly well right glide Tape ballast motor tube ballast consists lead weight making up difference between weight plane 190 grams location plane balances shown plan Glide plane over soft area dont have tall grass live just cactus sagebrush Put shims under stab until plane glides Adjust rudder tabs get wide left turn Wind about 50 turns gently launch straight ahead Make thrust adjustments get moderate too steep right turn pow er climb pattern should straight steep first turning right tightening power decreases near end power run rudders turn plane left glide can tighten glide turn after climb correct use 16 strands strong Pirelli wind 330 340 turns fully wound motor should have 110 120 in/oz torque FAI rubber use 14 strands wind about 310 320 turns should give torque 120 130 in/oz should mention factors consider winding motors maximum rubber must well broken test wound find out actual breaking point takes place wind winding tube protect plane help remove broken motors motor tube will stand broken motor difficult remove shock other parts also lessened motor tube Flying Wakefield both joy frustration above unend ing challenge never easy make good flight As things life difficult task greater reward CL Aerobatics/Paul continued page 36 Focke Wuif TA-152 first appeared MAN Dec 1968 Originally set up 35 Keith built new 1976 about same size ST 46 flew quite well picture plane appeared Nov 76 Nats report Model via tion German Me-109 can built top bottom blocks rather molded balsa evidenced Jack Sheeks two versions 35 size FM April 1970 46 size FM May 1977 trike gear could try Bill Si mons P-39 FM August 1968 35-size airplane Both Lew Woolard Charlie Reeves have flown P-39s success Woolard quali fied 72 Nats Two Hawker Typhoons have appeared over years Dennis Adamisin won Ju nior 69 Nats got third Senior 70 35 version appeared AM September 1970 now available RC Sportsman Steve Ashby 46-size Typhoon FM January 1976 writer Seafang F 31/32 final version WW-II Spit fire look closely Bruce Robert sons book Spitfire will see good choice semi-scale has adequate nose length laminar-flow non-elliptical wing enlarged tailplane air scoop under engine wide landing gear placement Unfortunately came out very heavy very warped got very scattered around runway 73 Nats However still think would good semi-scale plane Another favorite warbird would Martin-Baker 5 looks rather like Mustang stretched nose Frank Mc Millan started apparently never completed Ive never seen Zero competition Bernie Ash sent picture Don Ogran Indianapolis way back 1961 campaigned several years like find just little diffi cult watch WW-II fighter plane doing square-eights F-14 Tomcat doing tri angles might try Dennis Duvalls Miss Dara 35-powered pylon racer ap peared FM December 1973 Tom Dixon developed Stephens Akro AAM March 1975 fullscale aerobatics airplane Use ST 46 does Jon Ramsden order plans RC Sportsman Speaking Akros Lew McFarlands Akromaster AAM November 1974 plans also available same source one-of-a-kind prototype campaigned Lew several years finishing high fourth 72 Nats Speaking real thing have Jim Van Loo s version Hal Kriers Chip munk appeared MAN March 1968 35 40 engines 55-in wing course ship later evolved Sig Chipmunk dandy kit built correctly Pete Tindals 40-size Chipmonk Model Aviation April 1977 57-in wing should fly well use ST 46 engine Lew McFarland built beautiful Chipmunk McCoy 40 never got around flying much looked great air Some planes have left out because plans available could get magazine article work Dave Hemstroughts PT-19 AM Febru ary 1960 Lew McFarlands Vega 35 AM June 1962 Aldrichs AG-l Duster MAN August 1966 Jack Sheeks Spit fire Mk FM September 1968 course Sea Fury Al Rabe AAM March 1973 Al suggests no try because its difficult build Well list few could de veloped competitive stunt planes can obtain old magazine adapt plans contemporary design Mac chi 202 FM October 1974 plans avail92 Model Aviation product review product review product review New K & B Engines addition 7 new airplane engines ranging size 325cc 65cc K & Bs line now totals 16 airplane 4 marine engines seven new engines 325cc 19 front rotor 35cc 21 front rotor 49cc 29 58cc 35 front rotorall F F CL 35 RIO Sport 65 RIO 40 front rotor Perry carburetor 65cc 40 front rotorfor FF Pylon Total line 20 engines provides range sizes types powerplant demand available dealers K & B Manufacturing 12152 Woodruff Ave Downey CA 90241 product review product review product review iew product review product review CoxlSanwa Single Stick Conversion As comes manufacturer transmit ter provides two functions two single-axis stickswhich fine because beginner learns configuration may have problem moves up 4-channel fly ing looks help because has learned differently way ROers fly Ace offers conversion package consists new vinyl-clad case Dunham open-gim bal stick assembly two-stick owner can convert Complete instructions Price $1895 Ace RIC Box 511 116 W 19th St Higgineville MO 64037 product review product review product review able Flying Models P-26 Pea Shoot er FM March 1974 plans FM Hurricane FM August 1972 Skyraider FM March 1972Bill Werwage sup posed have very good flying tucked away basement Shoe string FM September 1971 Midget Mustang MAN October 1968 Bellanca Super Viking MAN October 1969 Ryan S-T AM July 1962 Bonzo AM November/December 1964 few sources old maga zines Bills Mail Order Hobby 503 West Astor Lees Summit MO 64063 bodys Bookshop 317 W 6th St Los Angeles CA 90014 Mal MacLean 6 Larry Dr Commack NY 11725 David Braun 5670 Ensenada Way Meca #436 Riverside CA 92504 Modelers everywhere express sym pathy Bob Gieseke children upon learning death wife Anna Mae drowning accident vacation Acapulco Mexico early March information stunt PA MPA Wynn Paul 1640 Maywick Dr Lex KY 40504 Th SPORTSTER 39 span 049 power op 3nhomets rio great sport t930s $1295 FAtRctfiLD 22 48 Wingspanperce 09 to25 Poweromouced 3Chonnet #ic *107 qw VA SESICCOOS Ann AS TAOCAC 10% FOR PACKISA *00 POSTAGE see local hobby dealer AMORICAN CLASStCS worlds finest models Send br tree brochAre Aristocrat Sceanc3 FAC SCOW COG PALRE WIASSE SI WISASPMI ASS POSER FOR V11255SAOOCOETSOL UP TO 01050 5A WIPASPAS 00 POt..COCSAELIATRCC CLASSIC AR FOR RAAIO COSTRAL OS FREE FLIOIITCRAFT FROG 01W SOLOES ESA B EL LA NCA OUNSCA OCA OR 00K POWER #101* #102tel 703 2739593 35 WIRASFAS 02C POWER FOR PULSE ANE WALL 2AALTI-RAAIO LYLINE MODELS 0643 ASFIBY PL FAIRFAX VA 22030 FF Scale/Kuenz continued page 43 bottom Also look weight savings Obviously wing J3 would need two 1/16 sq string ers because struts would provide strength maintain alignment reason need strength control old bugaboo warps strong wing will resist warping will hold warps needed trim Well talk about later about wing tips Throw away parts look like jigsaw puzzle replace laminated wing tips De cide right now bite bullet making proper form constructing laminated wing tips three advantages laminated wing tips much stronger 2 lighter 3 can easily assembled provide tip dihedral Use laminations much possible Stab Construction First off look size stab prints stab span isnt about same distance fuselage side wing tip stab area may too small Redraw layout retaining its distinctive outline very difficult trim around too small stab especially outside Also look curved outlines stab shoull made up laminations just like wing tips nothing like laminated stab outlines keep weight mini mum critical STAB OPENING STAB THICKNESS TACK GLUE STAB HERE ONLY WHILE TRIMMING FROM STAB PLATES MAKE SHEET BALSA WITH SLOT CUT 30 STAB THICKNESS ASSEMBLE BETWhN STRINGERS 2 METHODS OF MOUNTING STAB IN BIFFEREUT FUSELAGES STAB PLATE SHOWING POSITION OF STAB AND ROOM FOR ALTERING INCIDENCE stab mounted fuse lage Alter construction allow stab shimmed through range 4 6 degrees stab fits slot widen slot about three times thick ness stab Tack glue stab leading trailing edge allow ease adjustment during trim flights After model trimmed fill open areas wood tissue over Rudder Under circumstances scale rudder outline sufficient direc tional stability except some cases bi planes radial rotary engined largefuselage models seems types especially trimmed mod erately high climb very little slipstream gets rudder therefore little directional stability model falls category may need taller rudder careful too much rudder just bad since can make wing dihedral less effective keeping model turn may become spiral dive di hedral able return model normal flight Rudder construction should follow methods used stab Use laminations much possible keep strength up weight down Incorporate changes next scale model Ill guarantee wont product review product review product review REL OfScOFWCT 10 FLL Leakproof Fuel Manifold mounted tween tank engine manifold pro vides convenient method tank filling draining engine priming $ 95 Fourmost Racing Products 4040 24th Ave Forest Grove OR 97116 product review product review product review July1977 93
Edition: Model Aviation - 1977/07
Page Numbers: 36, 92, 93
Aerobalics El Wynn Paul SEMI-SCALE STUNT planes have important part scene since first Nationals 1946 Ralph Roof won Open Stunt flying six-foot Taylorcraft Forester 99 up front course stunt pattern quite different featuring such maneuvers wheel touch ing 7 points stall recovery 8 glider pick up 10 laying smoke screen 3 rolls 35 flying two planes once 7 Weve come long way molded balsa fuselage foam wing polyester finish multiple adjustable features todays semi-scale stunters favorite semi-scales Bearcat have least four excellent ones Al Rabes Jim Lynchs Ron Hardings Mike Wag ners Als article appeared AAM March 1970 molded balsa fuselage must plane weighs 55 oz youre trouble difficult plane build certainly impressive flight Al Jim suggest some changes basic model shown AA M can obtain specs changes two modelers word requesting information know top fliers get numerous requests help information tips etc Some modelers very cooperative taking time effort answer letter Others answer requests However modelers search assistance should realize answering letter re quest takes time Requests should spe cific form mini-question naire space provided answer Always provide self-addressed stamped return envelope postcard much easier people fill out ques tionnaire-type letter slip stamped return envelope likely receive answer F-S 1 probably common semi-scale Rabe Bill Rutherford have versions very competitive host other fliers trying P-Si Wing loading can get out hand easily planes have careful origi nal Mustang Rabe AAM June 1969 again model has up dated Al Bill Al Meyers 666 Orr St Joliet IL 60436 has plans available competitive version want reasonably light wing loading bet ter build scratch Bearcat Mustang would good subjects Atlanta Stunt Conspiracy plans similar Gieseke Nobler available Perhaps Rabe Rutherford Lynch Harding could send drawings Tom Dixon possible publi cation According index have least 50 semi-scale stunt ships magazines since 1960 trick ob tain magazine article plans Ill discuss some other possibilities below have several Stukas over years Don Stills original 48-in contender would make good 35-powered stunter cause its small size plane sev eral others still available Hobby Helpers 1543 StilIwell Ave Bronx NY 10451 Also available same source Frank Warburtons Tony 57-in span probably should have 5T46 instead listed 35 Charles Mackeys Mark Spitfire 57-in span Arch Adamisin also Tony stunter 35 size foam wing Plans available RC Sportsman P0 Box 11247 Reno NV 89510 MAN good 3-view Tony June 1966 French Dewoitine D-520 should make good semi-scale ship Art Adami sin Kent Rogers good exam ples craft 35 46 size re spectively No plans available Profile series no 135 good start advanced modeler An airplane certainly lends itself stunt configuration Keith Trostles Continued page 92 36 Model Aviation Pleasant lines distinguish Ron Rays Javelin Powered Enya 35 equipped uni flow tank Civilian-type pilot figure pit Bearcats forever Great piston-engine fighter perennial favorite Ron Hardings flashy look- World Trophy awarded Les McDonald ing rendition powered ST 46 friends Orange Blossom Hobby Shop Miami Speaking subjects never diestunt radio CL scalethe P51 Mustang must popular WW II subjects semi-scale Al Meyers has 54-in span ST 40 ATTENTION ALL AMA CLUBS Need Working Capital Earn $2000 0 next contest EASY WAY complete docket send $995 plus 50 cents postage Godfrey & Son Inc 254 Washington St Binghamton NV 13901 THE BIG HIs AM CCOMING dont work well too thin break finish blade few coats plasticized nitrate dope dont fill grain wood turbulator does work keeps prop pulling slower portion power run winding loop made solid heat-treated aluminum may ordered Jim Crocket Flying No 8 designed fly right un der power glide left glide right recommended because have never plane design fly well right glide Tape ballast motor tube ballast consists lead weight making up difference between weight plane 190 grams location plane balances shown plan Glide plane over soft area dont have tall grass live just cactus sagebrush Put shims under stab until plane glides Adjust rudder tabs get wide left turn Wind about 50 turns gently launch straight ahead Make thrust adjustments get moderate too steep right turn pow er climb pattern should straight steep first turning right tightening power decreases near end power run rudders turn plane left glide can tighten glide turn after climb correct use 16 strands strong Pirelli wind 330 340 turns fully wound motor should have 110 120 in/oz torque FAI rubber use 14 strands wind about 310 320 turns should give torque 120 130 in/oz should mention factors consider winding motors maximum rubber must well broken test wound find out actual breaking point takes place wind winding tube protect plane help remove broken motors motor tube will stand broken motor difficult remove shock other parts also lessened motor tube Flying Wakefield both joy frustration above unend ing challenge never easy make good flight As things life difficult task greater reward CL Aerobatics/Paul continued page 36 Focke Wuif TA-152 first appeared MAN Dec 1968 Originally set up 35 Keith built new 1976 about same size ST 46 flew quite well picture plane appeared Nov 76 Nats report Model via tion German Me-109 can built top bottom blocks rather molded balsa evidenced Jack Sheeks two versions 35 size FM April 1970 46 size FM May 1977 trike gear could try Bill Si mons P-39 FM August 1968 35-size airplane Both Lew Woolard Charlie Reeves have flown P-39s success Woolard quali fied 72 Nats Two Hawker Typhoons have appeared over years Dennis Adamisin won Ju nior 69 Nats got third Senior 70 35 version appeared AM September 1970 now available RC Sportsman Steve Ashby 46-size Typhoon FM January 1976 writer Seafang F 31/32 final version WW-II Spit fire look closely Bruce Robert sons book Spitfire will see good choice semi-scale has adequate nose length laminar-flow non-elliptical wing enlarged tailplane air scoop under engine wide landing gear placement Unfortunately came out very heavy very warped got very scattered around runway 73 Nats However still think would good semi-scale plane Another favorite warbird would Martin-Baker 5 looks rather like Mustang stretched nose Frank Mc Millan started apparently never completed Ive never seen Zero competition Bernie Ash sent picture Don Ogran Indianapolis way back 1961 campaigned several years like find just little diffi cult watch WW-II fighter plane doing square-eights F-14 Tomcat doing tri angles might try Dennis Duvalls Miss Dara 35-powered pylon racer ap peared FM December 1973 Tom Dixon developed Stephens Akro AAM March 1975 fullscale aerobatics airplane Use ST 46 does Jon Ramsden order plans RC Sportsman Speaking Akros Lew McFarlands Akromaster AAM November 1974 plans also available same source one-of-a-kind prototype campaigned Lew several years finishing high fourth 72 Nats Speaking real thing have Jim Van Loo s version Hal Kriers Chip munk appeared MAN March 1968 35 40 engines 55-in wing course ship later evolved Sig Chipmunk dandy kit built correctly Pete Tindals 40-size Chipmonk Model Aviation April 1977 57-in wing should fly well use ST 46 engine Lew McFarland built beautiful Chipmunk McCoy 40 never got around flying much looked great air Some planes have left out because plans available could get magazine article work Dave Hemstroughts PT-19 AM Febru ary 1960 Lew McFarlands Vega 35 AM June 1962 Aldrichs AG-l Duster MAN August 1966 Jack Sheeks Spit fire Mk FM September 1968 course Sea Fury Al Rabe AAM March 1973 Al suggests no try because its difficult build Well list few could de veloped competitive stunt planes can obtain old magazine adapt plans contemporary design Mac chi 202 FM October 1974 plans avail92 Model Aviation product review product review product review New K & B Engines addition 7 new airplane engines ranging size 325cc 65cc K & Bs line now totals 16 airplane 4 marine engines seven new engines 325cc 19 front rotor 35cc 21 front rotor 49cc 29 58cc 35 front rotorall F F CL 35 RIO Sport 65 RIO 40 front rotor Perry carburetor 65cc 40 front rotorfor FF Pylon Total line 20 engines provides range sizes types powerplant demand available dealers K & B Manufacturing 12152 Woodruff Ave Downey CA 90241 product review product review product review iew product review product review CoxlSanwa Single Stick Conversion As comes manufacturer transmit ter provides two functions two single-axis stickswhich fine because beginner learns configuration may have problem moves up 4-channel fly ing looks help because has learned differently way ROers fly Ace offers conversion package consists new vinyl-clad case Dunham open-gim bal stick assembly two-stick owner can convert Complete instructions Price $1895 Ace RIC Box 511 116 W 19th St Higgineville MO 64037 product review product review product review able Flying Models P-26 Pea Shoot er FM March 1974 plans FM Hurricane FM August 1972 Skyraider FM March 1972Bill Werwage sup posed have very good flying tucked away basement Shoe string FM September 1971 Midget Mustang MAN October 1968 Bellanca Super Viking MAN October 1969 Ryan S-T AM July 1962 Bonzo AM November/December 1964 few sources old maga zines Bills Mail Order Hobby 503 West Astor Lees Summit MO 64063 bodys Bookshop 317 W 6th St Los Angeles CA 90014 Mal MacLean 6 Larry Dr Commack NY 11725 David Braun 5670 Ensenada Way Meca #436 Riverside CA 92504 Modelers everywhere express sym pathy Bob Gieseke children upon learning death wife Anna Mae drowning accident vacation Acapulco Mexico early March information stunt PA MPA Wynn Paul 1640 Maywick Dr Lex KY 40504 Th SPORTSTER 39 span 049 power op 3nhomets rio great sport t930s $1295 FAtRctfiLD 22 48 Wingspanperce 09 to25 Poweromouced 3Chonnet #ic *107 qw VA SESICCOOS Ann AS TAOCAC 10% FOR PACKISA *00 POSTAGE see local hobby dealer AMORICAN CLASStCS worlds finest models Send br tree brochAre Aristocrat Sceanc3 FAC SCOW COG PALRE WIASSE SI WISASPMI ASS POSER FOR V11255SAOOCOETSOL UP TO 01050 5A WIPASPAS 00 POt..COCSAELIATRCC CLASSIC AR FOR RAAIO COSTRAL OS FREE FLIOIITCRAFT FROG 01W SOLOES ESA B EL LA NCA OUNSCA OCA OR 00K POWER #101* #102tel 703 2739593 35 WIRASFAS 02C POWER FOR PULSE ANE WALL 2AALTI-RAAIO LYLINE MODELS 0643 ASFIBY PL FAIRFAX VA 22030 FF Scale/Kuenz continued page 43 bottom Also look weight savings Obviously wing J3 would need two 1/16 sq string ers because struts would provide strength maintain alignment reason need strength control old bugaboo warps strong wing will resist warping will hold warps needed trim Well talk about later about wing tips Throw away parts look like jigsaw puzzle replace laminated wing tips De cide right now bite bullet making proper form constructing laminated wing tips three advantages laminated wing tips much stronger 2 lighter 3 can easily assembled provide tip dihedral Use laminations much possible Stab Construction First off look size stab prints stab span isnt about same distance fuselage side wing tip stab area may too small Redraw layout retaining its distinctive outline very difficult trim around too small stab especially outside Also look curved outlines stab shoull made up laminations just like wing tips nothing like laminated stab outlines keep weight mini mum critical STAB OPENING STAB THICKNESS TACK GLUE STAB HERE ONLY WHILE TRIMMING FROM STAB PLATES MAKE SHEET BALSA WITH SLOT CUT 30 STAB THICKNESS ASSEMBLE BETWhN STRINGERS 2 METHODS OF MOUNTING STAB IN BIFFEREUT FUSELAGES STAB PLATE SHOWING POSITION OF STAB AND ROOM FOR ALTERING INCIDENCE stab mounted fuse lage Alter construction allow stab shimmed through range 4 6 degrees stab fits slot widen slot about three times thick ness stab Tack glue stab leading trailing edge allow ease adjustment during trim flights After model trimmed fill open areas wood tissue over Rudder Under circumstances scale rudder outline sufficient direc tional stability except some cases bi planes radial rotary engined largefuselage models seems types especially trimmed mod erately high climb very little slipstream gets rudder therefore little directional stability model falls category may need taller rudder careful too much rudder just bad since can make wing dihedral less effective keeping model turn may become spiral dive di hedral able return model normal flight Rudder construction should follow methods used stab Use laminations much possible keep strength up weight down Incorporate changes next scale model Ill guarantee wont product review product review product review REL OfScOFWCT 10 FLL Leakproof Fuel Manifold mounted tween tank engine manifold pro vides convenient method tank filling draining engine priming $ 95 Fourmost Racing Products 4040 24th Ave Forest Grove OR 97116 product review product review product review July1977 93