C AEROBATICS Wynn Paul AS STUNT fliers go new year number issues ideas should considered participate event Precision Aerobatics Model Pilots Association president Keith Trostle has recently sent out questionnaire members questions relating rules changes 198081 cycle well ideas PAMPA Categories Half-A stunt FAI team selection process Stunt fliers opinions following topics should direct remarks Keith 10900 Phillips Drive Upper Marlboro MD 20870 first topic has George Aldrichs scoring system adopted 1957 has changed much since biggest com plaint writer has heard about system scoring range 10-30 unrealistic especially since have grown up thinking terms 0-100 dollars cents well schooL international scoring system based 0-10 certainly realistic although FAI scoring also includes degree difficulty factor K factor PAMPA questionnaire suggests scoring range 0-10 one-half point increments no K factor overall range would cut 650 points around 175 points just relative factor Some people argue greater chance ties according writers friends math department University Kentucky chances tie going 650 175 points increase 04 percent significant amount importance having realistic scoring range far outweighs small chance tie Other changes consider regarding pattern 1 throw out appearance points 2 throw out pattern points 3 seven minutes flight limit rather eight minutes 4 reduce appearance points ten maneuver points changed ten 5 require mufflers precision aerobatics 6 throw outthe builder model rule RC has 7 eliminate hand signal make flight official model leaves ground 8 give bonus retractable landing gear 9 change number starting points 10 leave everything alone go flying 11 go entirely FAI international rules 12 elimi nate line diameter requirementuse 15 G pull test decide write Keith please concise point will tallying up some three four hundred answers Another issue what Half-A stunt Should put AMA rule book PAMPA has using set simplified rules last five Nationals include 1 entry per pilot pilot per airplane eliminate several pilots using same plane 2 no builder model rule 3 no appearance points 4 engine displacement allowed 051 Should PAMPA rules Half-A stunt enlarged elaborated upon Should Half-A stunt added local contests rather low entry Half-A stunt Nationals would make appear present unofficial status sufficient please enthusiasts Although FAI team selection process ap pears questionnaire writer feels item stunt world runs pretty much satisfaction fliers method selection dates site selection etc know three people come away team selection feeling judges did Continued page 108 March 1980 43 rledu- view oi os iues i-ernanaez S OT I-rancej moods snowing sprung undercarriage three- bladed propeller Picture Claus Maikis ojenin lie Own soam wing bpan bb weight 48 oz. K&B Series 75 engine Vince Schnetzer beat, -oi oOesiu vvgning eso ounces IT powered Supertigre 46 end finished Sig paints NEW. SIMIlAR WINS 1St PLACEPATTERN PRE-NOVICE 1979 WINTER NATS St MI TAR SI MI TAR SIMITAR SIMITAR SPORT SIMITAR 19- OP Span Sllndar d Kit InLiudes SI MITARPly Wing Sheeting SIMITARBalsa [usCtagC 5 9 TARGear Formed Sliding rray SIMITARFull Si/c Plans SIMIlAR WINS 1St PLACENORTHROP FLYING WING CONTEST 1979 TSHIRTS High Qualit lO0 $ ___ 95 MultI-Lolor Silkscreen U Sues 5 M L & XL Eletk Rider Yellow Plus $100 Astron Light Blue Shipping Similar 540 Tan Charge 5FF YOUR DEALER OR ORDER FROM BILL EVANS AIR/CRAFT 20825 ROSCOE BLVD CANOGA PARK CA 91306 TEL 213 344 6391 OR 709-0894 dozens jobs better amazing Foredom Miniature Power Tools Hangup benchB Variable speeds modelsS Hundreds cutters Powerful motor points abrasives Rugged flexible shaft special tools ENGRAVING SANDING DRNG ERASING SAWING POLISNIN~ DEBURRING ROUTING BUFFING Craftsmen model makers hobbyists know Foredoms professional qualify produces profeSsional results Light weight easy-to-hold handpieces Ideal fast super-precise drilling carving sanding grinding buffing dozens other operaf ions wood metals plas tics ceramics minerals See dealer send now Special offer machines handpieces speed controls tools described FREE Catalog File No 280A3 HEFOPEDOMEEOTRCCOMPAN BeC oeeo203 792 8622 structured like clubs president secretary etc have no formal meetings just get-togethers once discuss building techniques problems main purpose getting together course mutual interest scale secondly make effort promote scale area also making effort get members members other clubs interested trained scale carrier judges ITS WINNER Yellow Fever II SPORT& PYLON ______ II f II II EASY Build & Fly \iI ALL Balsa & Ply ConitI Parts MACHINE CUTI OLLED PLANSDEALERS AND HALLACO GEARSDISTRIBUTORS 500 TED ICI ETS 681 Wefferburn Ave IRPHUI SevernaPk M021148 As part program will holding early 1980 probably May Scale-Carrier meet will running two events can provide best possible judging attention contestants needs hoping presenting such event run strictly accord ing rules will go long way toward promoting both events area Bill sent several photos different scale ships Three included column Well show rest coming months must very enjoyable having group modelers such same interests close together Weve now heard Louisiana Scale Squadron New York Scale Teant past few months Are other Scale Teams out Question ror Month out have definite ideas best way set up tricycle geared scale ship track properly during taxi Mike Gretz Box 162 Montezuma Jl 50171 CL Aerobatics/Paul continued page 43 job. est item subject whether run trials conjunction place Nationals trials have held over Labor Day weekend since 1964 seems give adequate time prepara tion after Nationals good weekend hold competition writer feels team trials should kept separate Nationals just Olympic team tryouts held separately respective National Cham pionships Should trials held year before Championships Since event requires intense physical condition ing such track swimming writer feels holding tryouts year advance actually like nine months allows team members adequately prepare World Championships Another topic consideration estab lishment major PAMPA contest off year FAI team tryouts contest could include PAMPA classes Half-A stunt Old Time stunt well Profile stunt Actually extravaganza organized hosted year Bill Allen somewhere near DeKaIb Illinois gradually becoming second largest controlline contest nation after Nationals Only Winston-Salems 4A contest June bigger Labor Day weekend date Aero- Challenge Muscular Dystrophy Bills much attractive June date since extra day travel allowed least writers case Although Bill has problems year obtaining judges John Laws always need judge 25 30 stunt fliers contest rapidly becoming very popular fact past year Aero- Challenge actually got some fliers might have ordinarily participated FAI tryouts writers opinion PAMPA should throw its support Bill Allen fine contest topic has done stunt last few years attract new faces also perplexing to make AMA sanctioned event PAMPA category system Since first appearance PAMPA cate gories December 1973 issue Stunt News has gradual acceptance using Expert 500 above Advanced 400 499 Intermediate 301 399 Beginner under 300 classes local contests rather Junior Senior Open divisions stunt fliers relied upon Richard Byron publish stunt rankings according score averages However stunt fliers now simply enter name category feel belong event directors have option moving someone up down has done rarely few instances offlierssandbagging pick up cheap trophy problem lies wording category system inclusion AMA rule book Should just list various categories now let competitor voluntarily pick 108 Model Aviation Diesel Conversion Kits e Power Quiet Smooth Economical Send 25 & Stamped Addressed Envelope Dealer Inquiry Invited J Davis Diesel Development Inc Box 141 Milford CT 06460 WWI MODEL ACCESSORIES FINE QUALITY MACHINE GUN KITS JLLOAJS mLINc class should go acquisition certain number first second third places contests should figure point award based number competitors contest place competitor finishes finally should continue attempt keep scoring average fliers Some systems rely someone keep records Can expect AMA headquarters what about numerous contest administrators never send results Stunt News can hope send results AMA headquarters final problem PAMPA categories whether should include Nationals categories Nationals utilized course last Nationals saw 46 Open entries nearly half qualifiers since 20 flew Finals day Yes thats right last day really called Finalfinals day Walker Cup day informaton stunt P4MPA write WvnnPauh 1640 Maywick Dr Lexington KY 40504 WHEELS TS INGS SEND 50t FOR COMPLETE CATALOG DEPT MA 0 181 PAWNEE STREET SAN MARCOS CALIFORNIA 9 BARRONS L E C ASS IC S CL Combat/Johnson continued page 44 rye hearing about new proposed event called Speed Pattern Oh God another event say Sounds less destructive Combat easier Speed precision maneuvers Aerobatics Bob Hunt Mike 1-loffelt promoting event think would good idea two promote years Nationals event goes something like uncowled 40-powered model circulating astounding speeds 60-foot lines signal judge ready model streaks downwind marker judge starts stopwatch As finish first timed lap three inside loops continue around level lap three outside loops same downwind area same level lap used between next three horizontal-eights vertical-eights watch being stopped marker following level lap after vertical-eights Dog FAI did course 24 seconds AMA plane 15 course FAI less distance travel maneuvers would done designated window downwind keep pilot flying over sky Horizontal placement critical whereas vertical framing isnt can fly maneuvers tall want Sounds would least make fun event club meetings Well let 135-mph fire-breathers take over becomes national event event would offer challenge engine man plane designer super pilot would try trim down elapsed time through area proficiency Lets encourage Mike Bob sponsor event year some club level give try figure have give try event worthwhile will perpetuate itself whereas no amount fiddling rules would thing aid its popularity Makes think about long-forgotten Texas combat flier 1952 invented mid-air collision look what thats done rules-making combat general Charlie Johnson 3716 Ingraham St San Diego C4 92109 CL Racing/Lee continued page 45 generated lift wings example Big Goodyear Ac= 115 Gs Accos145 115 x9681 111 Gs Alt in 145 115 x25 29 Gs FIGURE 3 Ac ripetal acceleration Gs Acceleration transmitted through lines Al AccosGAl Ac e AtAg Alt Lift acceleration keep plane altitude Ac sin cceleration balancing Ag Ag Acceleration due gravity e Angle lines make horizontal wing must produce 29 Gs lift just counteract component centripetal force cannot transmitted via lines addition lift necessary support aircraft Al s since lift created perpendicular wing lift neces sary produce 10 G ofvertical force 0/cos0 Hence total lift produced wing Lift 104 Gs almost four times much lift needed 15 feet above handle handle height Quite lot lift needed fly high lift creates drag causes airplane slow down rational explanation see speed fliers actually flying below level pylon going faster because What force acts fuel system flying above handle level Actually same conditions apply applied before slight changes quantity fuel tank sees force acting outward downward Using Big Goodyear example fuel sees about 115 Gs force acting about five degrees below horizon tal big change body tank 112 Model Aiiation ENGINE KITS & CYLINDERS Rosies D&R Fbwer Pod Fits CDX T- D & Med 049 051 Engs Rubber Band Screw Mounting Eng mts upright Inverted Running time appx 4 mm Nylon injection mouldedColors Power 3 lb airplanes total weight 3M OL$595RED BLACK WEYELLOW ALSOORANGE MAKE BANTAM ServosWrite D&R SticksFor Free Connectors Bulkhead SwitchCatalog mountsFin Products ch jeavy duty gear Woid oda *siua D otha fin pveducu 3501-B W Moore St Santa Ana CA 92704 PLANS & cONsTR MANUAL Curtiss Hawk PGE Stinson Reliant SR9 I/4SCALE 94SSP $2250 SASCALE 126SP $2500 2SCALE B3SPAPE 51250 2SCALE S4SPAN $1500 23SCALE 47l/4SF$1050 15sCALr 6iSPAN $1250 Curtiss FIIC2 Curtiss Gulthawk IA ShScALE 54SSP $3000 1MSCALE 945SP $3000 2SCALE 03SP $1500 2SCALE C3SP $1500 PLEASE ADD *200 0RP/H USASEND $100 WRITE row MAE LINO IT7 t INrORMATION INCLUDE $100CATALOGE row CATALOOE 1213 HOLLY Spmoe LANE GRAND BLANC Mi 40439 SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1980/03
Page Numbers: 43, 108, 112
C AEROBATICS Wynn Paul AS STUNT fliers go new year number issues ideas should considered participate event Precision Aerobatics Model Pilots Association president Keith Trostle has recently sent out questionnaire members questions relating rules changes 198081 cycle well ideas PAMPA Categories Half-A stunt FAI team selection process Stunt fliers opinions following topics should direct remarks Keith 10900 Phillips Drive Upper Marlboro MD 20870 first topic has George Aldrichs scoring system adopted 1957 has changed much since biggest com plaint writer has heard about system scoring range 10-30 unrealistic especially since have grown up thinking terms 0-100 dollars cents well schooL international scoring system based 0-10 certainly realistic although FAI scoring also includes degree difficulty factor K factor PAMPA questionnaire suggests scoring range 0-10 one-half point increments no K factor overall range would cut 650 points around 175 points just relative factor Some people argue greater chance ties according writers friends math department University Kentucky chances tie going 650 175 points increase 04 percent significant amount importance having realistic scoring range far outweighs small chance tie Other changes consider regarding pattern 1 throw out appearance points 2 throw out pattern points 3 seven minutes flight limit rather eight minutes 4 reduce appearance points ten maneuver points changed ten 5 require mufflers precision aerobatics 6 throw outthe builder model rule RC has 7 eliminate hand signal make flight official model leaves ground 8 give bonus retractable landing gear 9 change number starting points 10 leave everything alone go flying 11 go entirely FAI international rules 12 elimi nate line diameter requirementuse 15 G pull test decide write Keith please concise point will tallying up some three four hundred answers Another issue what Half-A stunt Should put AMA rule book PAMPA has using set simplified rules last five Nationals include 1 entry per pilot pilot per airplane eliminate several pilots using same plane 2 no builder model rule 3 no appearance points 4 engine displacement allowed 051 Should PAMPA rules Half-A stunt enlarged elaborated upon Should Half-A stunt added local contests rather low entry Half-A stunt Nationals would make appear present unofficial status sufficient please enthusiasts Although FAI team selection process ap pears questionnaire writer feels item stunt world runs pretty much satisfaction fliers method selection dates site selection etc know three people come away team selection feeling judges did Continued page 108 March 1980 43 rledu- view oi os iues i-ernanaez S OT I-rancej moods snowing sprung undercarriage three- bladed propeller Picture Claus Maikis ojenin lie Own soam wing bpan bb weight 48 oz. K&B Series 75 engine Vince Schnetzer beat, -oi oOesiu vvgning eso ounces IT powered Supertigre 46 end finished Sig paints NEW. SIMIlAR WINS 1St PLACEPATTERN PRE-NOVICE 1979 WINTER NATS St MI TAR SI MI TAR SIMITAR SIMITAR SPORT SIMITAR 19- OP Span Sllndar d Kit InLiudes SI MITARPly Wing Sheeting SIMITARBalsa [usCtagC 5 9 TARGear Formed Sliding rray SIMITARFull Si/c Plans SIMIlAR WINS 1St PLACENORTHROP FLYING WING CONTEST 1979 TSHIRTS High Qualit lO0 $ ___ 95 MultI-Lolor Silkscreen U Sues 5 M L & XL Eletk Rider Yellow Plus $100 Astron Light Blue Shipping Similar 540 Tan Charge 5FF YOUR DEALER OR ORDER FROM BILL EVANS AIR/CRAFT 20825 ROSCOE BLVD CANOGA PARK CA 91306 TEL 213 344 6391 OR 709-0894 dozens jobs better amazing Foredom Miniature Power Tools Hangup benchB Variable speeds modelsS Hundreds cutters Powerful motor points abrasives Rugged flexible shaft special tools ENGRAVING SANDING DRNG ERASING SAWING POLISNIN~ DEBURRING ROUTING BUFFING Craftsmen model makers hobbyists know Foredoms professional qualify produces profeSsional results Light weight easy-to-hold handpieces Ideal fast super-precise drilling carving sanding grinding buffing dozens other operaf ions wood metals plas tics ceramics minerals See dealer send now Special offer machines handpieces speed controls tools described FREE Catalog File No 280A3 HEFOPEDOMEEOTRCCOMPAN BeC oeeo203 792 8622 structured like clubs president secretary etc have no formal meetings just get-togethers once discuss building techniques problems main purpose getting together course mutual interest scale secondly make effort promote scale area also making effort get members members other clubs interested trained scale carrier judges ITS WINNER Yellow Fever II SPORT& PYLON ______ II f II II EASY Build & Fly \iI ALL Balsa & Ply ConitI Parts MACHINE CUTI OLLED PLANSDEALERS AND HALLACO GEARSDISTRIBUTORS 500 TED ICI ETS 681 Wefferburn Ave IRPHUI SevernaPk M021148 As part program will holding early 1980 probably May Scale-Carrier meet will running two events can provide best possible judging attention contestants needs hoping presenting such event run strictly accord ing rules will go long way toward promoting both events area Bill sent several photos different scale ships Three included column Well show rest coming months must very enjoyable having group modelers such same interests close together Weve now heard Louisiana Scale Squadron New York Scale Teant past few months Are other Scale Teams out Question ror Month out have definite ideas best way set up tricycle geared scale ship track properly during taxi Mike Gretz Box 162 Montezuma Jl 50171 CL Aerobatics/Paul continued page 43 job. est item subject whether run trials conjunction place Nationals trials have held over Labor Day weekend since 1964 seems give adequate time prepara tion after Nationals good weekend hold competition writer feels team trials should kept separate Nationals just Olympic team tryouts held separately respective National Cham pionships Should trials held year before Championships Since event requires intense physical condition ing such track swimming writer feels holding tryouts year advance actually like nine months allows team members adequately prepare World Championships Another topic consideration estab lishment major PAMPA contest off year FAI team tryouts contest could include PAMPA classes Half-A stunt Old Time stunt well Profile stunt Actually extravaganza organized hosted year Bill Allen somewhere near DeKaIb Illinois gradually becoming second largest controlline contest nation after Nationals Only Winston-Salems 4A contest June bigger Labor Day weekend date Aero- Challenge Muscular Dystrophy Bills much attractive June date since extra day travel allowed least writers case Although Bill has problems year obtaining judges John Laws always need judge 25 30 stunt fliers contest rapidly becoming very popular fact past year Aero- Challenge actually got some fliers might have ordinarily participated FAI tryouts writers opinion PAMPA should throw its support Bill Allen fine contest topic has done stunt last few years attract new faces also perplexing to make AMA sanctioned event PAMPA category system Since first appearance PAMPA cate gories December 1973 issue Stunt News has gradual acceptance using Expert 500 above Advanced 400 499 Intermediate 301 399 Beginner under 300 classes local contests rather Junior Senior Open divisions stunt fliers relied upon Richard Byron publish stunt rankings according score averages However stunt fliers now simply enter name category feel belong event directors have option moving someone up down has done rarely few instances offlierssandbagging pick up cheap trophy problem lies wording category system inclusion AMA rule book Should just list various categories now let competitor voluntarily pick 108 Model Aviation Diesel Conversion Kits e Power Quiet Smooth Economical Send 25 & Stamped Addressed Envelope Dealer Inquiry Invited J Davis Diesel Development Inc Box 141 Milford CT 06460 WWI MODEL ACCESSORIES FINE QUALITY MACHINE GUN KITS JLLOAJS mLINc class should go acquisition certain number first second third places contests should figure point award based number competitors contest place competitor finishes finally should continue attempt keep scoring average fliers Some systems rely someone keep records Can expect AMA headquarters what about numerous contest administrators never send results Stunt News can hope send results AMA headquarters final problem PAMPA categories whether should include Nationals categories Nationals utilized course last Nationals saw 46 Open entries nearly half qualifiers since 20 flew Finals day Yes thats right last day really called Finalfinals day Walker Cup day informaton stunt P4MPA write WvnnPauh 1640 Maywick Dr Lexington KY 40504 WHEELS TS INGS SEND 50t FOR COMPLETE CATALOG DEPT MA 0 181 PAWNEE STREET SAN MARCOS CALIFORNIA 9 BARRONS L E C ASS IC S CL Combat/Johnson continued page 44 rye hearing about new proposed event called Speed Pattern Oh God another event say Sounds less destructive Combat easier Speed precision maneuvers Aerobatics Bob Hunt Mike 1-loffelt promoting event think would good idea two promote years Nationals event goes something like uncowled 40-powered model circulating astounding speeds 60-foot lines signal judge ready model streaks downwind marker judge starts stopwatch As finish first timed lap three inside loops continue around level lap three outside loops same downwind area same level lap used between next three horizontal-eights vertical-eights watch being stopped marker following level lap after vertical-eights Dog FAI did course 24 seconds AMA plane 15 course FAI less distance travel maneuvers would done designated window downwind keep pilot flying over sky Horizontal placement critical whereas vertical framing isnt can fly maneuvers tall want Sounds would least make fun event club meetings Well let 135-mph fire-breathers take over becomes national event event would offer challenge engine man plane designer super pilot would try trim down elapsed time through area proficiency Lets encourage Mike Bob sponsor event year some club level give try figure have give try event worthwhile will perpetuate itself whereas no amount fiddling rules would thing aid its popularity Makes think about long-forgotten Texas combat flier 1952 invented mid-air collision look what thats done rules-making combat general Charlie Johnson 3716 Ingraham St San Diego C4 92109 CL Racing/Lee continued page 45 generated lift wings example Big Goodyear Ac= 115 Gs Accos145 115 x9681 111 Gs Alt in 145 115 x25 29 Gs FIGURE 3 Ac ripetal acceleration Gs Acceleration transmitted through lines Al AccosGAl Ac e AtAg Alt Lift acceleration keep plane altitude Ac sin cceleration balancing Ag Ag Acceleration due gravity e Angle lines make horizontal wing must produce 29 Gs lift just counteract component centripetal force cannot transmitted via lines addition lift necessary support aircraft Al s since lift created perpendicular wing lift neces sary produce 10 G ofvertical force 0/cos0 Hence total lift produced wing Lift 104 Gs almost four times much lift needed 15 feet above handle handle height Quite lot lift needed fly high lift creates drag causes airplane slow down rational explanation see speed fliers actually flying below level pylon going faster because What force acts fuel system flying above handle level Actually same conditions apply applied before slight changes quantity fuel tank sees force acting outward downward Using Big Goodyear example fuel sees about 115 Gs force acting about five degrees below horizon tal big change body tank 112 Model Aiiation ENGINE KITS & CYLINDERS Rosies D&R Fbwer Pod Fits CDX T- D & Med 049 051 Engs Rubber Band Screw Mounting Eng mts upright Inverted Running time appx 4 mm Nylon injection mouldedColors Power 3 lb airplanes total weight 3M OL$595RED BLACK WEYELLOW ALSOORANGE MAKE BANTAM ServosWrite D&R SticksFor Free Connectors Bulkhead SwitchCatalog mountsFin Products ch jeavy duty gear Woid oda *siua D otha fin pveducu 3501-B W Moore St Santa Ana CA 92704 PLANS & cONsTR MANUAL Curtiss Hawk PGE Stinson Reliant SR9 I/4SCALE 94SSP $2250 SASCALE 126SP $2500 2SCALE B3SPAPE 51250 2SCALE S4SPAN $1500 23SCALE 47l/4SF$1050 15sCALr 6iSPAN $1250 Curtiss FIIC2 Curtiss Gulthawk IA ShScALE 54SSP $3000 1MSCALE 945SP $3000 2SCALE 03SP $1500 2SCALE C3SP $1500 PLEASE ADD *200 0RP/H USASEND $100 WRITE row MAE LINO IT7 t INrORMATION INCLUDE $100CATALOGE row CATALOOE 1213 HOLLY Spmoe LANE GRAND BLANC Mi 40439 SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1980/03
Page Numbers: 43, 108, 112
C AEROBATICS Wynn Paul AS STUNT fliers go new year number issues ideas should considered participate event Precision Aerobatics Model Pilots Association president Keith Trostle has recently sent out questionnaire members questions relating rules changes 198081 cycle well ideas PAMPA Categories Half-A stunt FAI team selection process Stunt fliers opinions following topics should direct remarks Keith 10900 Phillips Drive Upper Marlboro MD 20870 first topic has George Aldrichs scoring system adopted 1957 has changed much since biggest com plaint writer has heard about system scoring range 10-30 unrealistic especially since have grown up thinking terms 0-100 dollars cents well schooL international scoring system based 0-10 certainly realistic although FAI scoring also includes degree difficulty factor K factor PAMPA questionnaire suggests scoring range 0-10 one-half point increments no K factor overall range would cut 650 points around 175 points just relative factor Some people argue greater chance ties according writers friends math department University Kentucky chances tie going 650 175 points increase 04 percent significant amount importance having realistic scoring range far outweighs small chance tie Other changes consider regarding pattern 1 throw out appearance points 2 throw out pattern points 3 seven minutes flight limit rather eight minutes 4 reduce appearance points ten maneuver points changed ten 5 require mufflers precision aerobatics 6 throw outthe builder model rule RC has 7 eliminate hand signal make flight official model leaves ground 8 give bonus retractable landing gear 9 change number starting points 10 leave everything alone go flying 11 go entirely FAI international rules 12 elimi nate line diameter requirementuse 15 G pull test decide write Keith please concise point will tallying up some three four hundred answers Another issue what Half-A stunt Should put AMA rule book PAMPA has using set simplified rules last five Nationals include 1 entry per pilot pilot per airplane eliminate several pilots using same plane 2 no builder model rule 3 no appearance points 4 engine displacement allowed 051 Should PAMPA rules Half-A stunt enlarged elaborated upon Should Half-A stunt added local contests rather low entry Half-A stunt Nationals would make appear present unofficial status sufficient please enthusiasts Although FAI team selection process ap pears questionnaire writer feels item stunt world runs pretty much satisfaction fliers method selection dates site selection etc know three people come away team selection feeling judges did Continued page 108 March 1980 43 rledu- view oi os iues i-ernanaez S OT I-rancej moods snowing sprung undercarriage three- bladed propeller Picture Claus Maikis ojenin lie Own soam wing bpan bb weight 48 oz. K&B Series 75 engine Vince Schnetzer beat, -oi oOesiu vvgning eso ounces IT powered Supertigre 46 end finished Sig paints NEW. SIMIlAR WINS 1St PLACEPATTERN PRE-NOVICE 1979 WINTER NATS St MI TAR SI MI TAR SIMITAR SIMITAR SPORT SIMITAR 19- OP Span Sllndar d Kit InLiudes SI MITARPly Wing Sheeting SIMITARBalsa [usCtagC 5 9 TARGear Formed Sliding rray SIMITARFull Si/c Plans SIMIlAR WINS 1St PLACENORTHROP FLYING WING CONTEST 1979 TSHIRTS High Qualit lO0 $ ___ 95 MultI-Lolor Silkscreen U Sues 5 M L & XL Eletk Rider Yellow Plus $100 Astron Light Blue Shipping Similar 540 Tan Charge 5FF YOUR DEALER OR ORDER FROM BILL EVANS AIR/CRAFT 20825 ROSCOE BLVD CANOGA PARK CA 91306 TEL 213 344 6391 OR 709-0894 dozens jobs better amazing Foredom Miniature Power Tools Hangup benchB Variable speeds modelsS Hundreds cutters Powerful motor points abrasives Rugged flexible shaft special tools ENGRAVING SANDING DRNG ERASING SAWING POLISNIN~ DEBURRING ROUTING BUFFING Craftsmen model makers hobbyists know Foredoms professional qualify produces profeSsional results Light weight easy-to-hold handpieces Ideal fast super-precise drilling carving sanding grinding buffing dozens other operaf ions wood metals plas tics ceramics minerals See dealer send now Special offer machines handpieces speed controls tools described FREE Catalog File No 280A3 HEFOPEDOMEEOTRCCOMPAN BeC oeeo203 792 8622 structured like clubs president secretary etc have no formal meetings just get-togethers once discuss building techniques problems main purpose getting together course mutual interest scale secondly make effort promote scale area also making effort get members members other clubs interested trained scale carrier judges ITS WINNER Yellow Fever II SPORT& PYLON ______ II f II II EASY Build & Fly \iI ALL Balsa & Ply ConitI Parts MACHINE CUTI OLLED PLANSDEALERS AND HALLACO GEARSDISTRIBUTORS 500 TED ICI ETS 681 Wefferburn Ave IRPHUI SevernaPk M021148 As part program will holding early 1980 probably May Scale-Carrier meet will running two events can provide best possible judging attention contestants needs hoping presenting such event run strictly accord ing rules will go long way toward promoting both events area Bill sent several photos different scale ships Three included column Well show rest coming months must very enjoyable having group modelers such same interests close together Weve now heard Louisiana Scale Squadron New York Scale Teant past few months Are other Scale Teams out Question ror Month out have definite ideas best way set up tricycle geared scale ship track properly during taxi Mike Gretz Box 162 Montezuma Jl 50171 CL Aerobatics/Paul continued page 43 job. est item subject whether run trials conjunction place Nationals trials have held over Labor Day weekend since 1964 seems give adequate time prepara tion after Nationals good weekend hold competition writer feels team trials should kept separate Nationals just Olympic team tryouts held separately respective National Cham pionships Should trials held year before Championships Since event requires intense physical condition ing such track swimming writer feels holding tryouts year advance actually like nine months allows team members adequately prepare World Championships Another topic consideration estab lishment major PAMPA contest off year FAI team tryouts contest could include PAMPA classes Half-A stunt Old Time stunt well Profile stunt Actually extravaganza organized hosted year Bill Allen somewhere near DeKaIb Illinois gradually becoming second largest controlline contest nation after Nationals Only Winston-Salems 4A contest June bigger Labor Day weekend date Aero- Challenge Muscular Dystrophy Bills much attractive June date since extra day travel allowed least writers case Although Bill has problems year obtaining judges John Laws always need judge 25 30 stunt fliers contest rapidly becoming very popular fact past year Aero- Challenge actually got some fliers might have ordinarily participated FAI tryouts writers opinion PAMPA should throw its support Bill Allen fine contest topic has done stunt last few years attract new faces also perplexing to make AMA sanctioned event PAMPA category system Since first appearance PAMPA cate gories December 1973 issue Stunt News has gradual acceptance using Expert 500 above Advanced 400 499 Intermediate 301 399 Beginner under 300 classes local contests rather Junior Senior Open divisions stunt fliers relied upon Richard Byron publish stunt rankings according score averages However stunt fliers now simply enter name category feel belong event directors have option moving someone up down has done rarely few instances offlierssandbagging pick up cheap trophy problem lies wording category system inclusion AMA rule book Should just list various categories now let competitor voluntarily pick 108 Model Aviation Diesel Conversion Kits e Power Quiet Smooth Economical Send 25 & Stamped Addressed Envelope Dealer Inquiry Invited J Davis Diesel Development Inc Box 141 Milford CT 06460 WWI MODEL ACCESSORIES FINE QUALITY MACHINE GUN KITS JLLOAJS mLINc class should go acquisition certain number first second third places contests should figure point award based number competitors contest place competitor finishes finally should continue attempt keep scoring average fliers Some systems rely someone keep records Can expect AMA headquarters what about numerous contest administrators never send results Stunt News can hope send results AMA headquarters final problem PAMPA categories whether should include Nationals categories Nationals utilized course last Nationals saw 46 Open entries nearly half qualifiers since 20 flew Finals day Yes thats right last day really called Finalfinals day Walker Cup day informaton stunt P4MPA write WvnnPauh 1640 Maywick Dr Lexington KY 40504 WHEELS TS INGS SEND 50t FOR COMPLETE CATALOG DEPT MA 0 181 PAWNEE STREET SAN MARCOS CALIFORNIA 9 BARRONS L E C ASS IC S CL Combat/Johnson continued page 44 rye hearing about new proposed event called Speed Pattern Oh God another event say Sounds less destructive Combat easier Speed precision maneuvers Aerobatics Bob Hunt Mike 1-loffelt promoting event think would good idea two promote years Nationals event goes something like uncowled 40-powered model circulating astounding speeds 60-foot lines signal judge ready model streaks downwind marker judge starts stopwatch As finish first timed lap three inside loops continue around level lap three outside loops same downwind area same level lap used between next three horizontal-eights vertical-eights watch being stopped marker following level lap after vertical-eights Dog FAI did course 24 seconds AMA plane 15 course FAI less distance travel maneuvers would done designated window downwind keep pilot flying over sky Horizontal placement critical whereas vertical framing isnt can fly maneuvers tall want Sounds would least make fun event club meetings Well let 135-mph fire-breathers take over becomes national event event would offer challenge engine man plane designer super pilot would try trim down elapsed time through area proficiency Lets encourage Mike Bob sponsor event year some club level give try figure have give try event worthwhile will perpetuate itself whereas no amount fiddling rules would thing aid its popularity Makes think about long-forgotten Texas combat flier 1952 invented mid-air collision look what thats done rules-making combat general Charlie Johnson 3716 Ingraham St San Diego C4 92109 CL Racing/Lee continued page 45 generated lift wings example Big Goodyear Ac= 115 Gs Accos145 115 x9681 111 Gs Alt in 145 115 x25 29 Gs FIGURE 3 Ac ripetal acceleration Gs Acceleration transmitted through lines Al AccosGAl Ac e AtAg Alt Lift acceleration keep plane altitude Ac sin cceleration balancing Ag Ag Acceleration due gravity e Angle lines make horizontal wing must produce 29 Gs lift just counteract component centripetal force cannot transmitted via lines addition lift necessary support aircraft Al s since lift created perpendicular wing lift neces sary produce 10 G ofvertical force 0/cos0 Hence total lift produced wing Lift 104 Gs almost four times much lift needed 15 feet above handle handle height Quite lot lift needed fly high lift creates drag causes airplane slow down rational explanation see speed fliers actually flying below level pylon going faster because What force acts fuel system flying above handle level Actually same conditions apply applied before slight changes quantity fuel tank sees force acting outward downward Using Big Goodyear example fuel sees about 115 Gs force acting about five degrees below horizon tal big change body tank 112 Model Aiiation ENGINE KITS & CYLINDERS Rosies D&R Fbwer Pod Fits CDX T- D & Med 049 051 Engs Rubber Band Screw Mounting Eng mts upright Inverted Running time appx 4 mm Nylon injection mouldedColors Power 3 lb airplanes total weight 3M OL$595RED BLACK WEYELLOW ALSOORANGE MAKE BANTAM ServosWrite D&R SticksFor Free Connectors Bulkhead SwitchCatalog mountsFin Products ch jeavy duty gear Woid oda *siua D otha fin pveducu 3501-B W Moore St Santa Ana CA 92704 PLANS & cONsTR MANUAL Curtiss Hawk PGE Stinson Reliant SR9 I/4SCALE 94SSP $2250 SASCALE 126SP $2500 2SCALE B3SPAPE 51250 2SCALE S4SPAN $1500 23SCALE 47l/4SF$1050 15sCALr 6iSPAN $1250 Curtiss FIIC2 Curtiss Gulthawk IA ShScALE 54SSP $3000 1MSCALE 945SP $3000 2SCALE 03SP $1500 2SCALE C3SP $1500 PLEASE ADD *200 0RP/H USASEND $100 WRITE row MAE LINO IT7 t INrORMATION INCLUDE $100CATALOGE row CATALOOE 1213 HOLLY Spmoe LANE GRAND BLANC Mi 40439 SAFE FLYING IS NO ACCIDENT