Control Line eroba tics Ted Fancher WOW knew contributing editors gained enormous influence result monthly blatherings never would have guessed could bring dead back life Al Rabe no less mid-season form See CL Stunt Design MA January 1985 seems toss-off column P-factor has become almost cause celebre amongst Stunt aficionados proving selves much sophisticated aerodynamic puzzles adult divertissements grown-ups toys ever would have guessed Very pleasing encouraging opens door future subject matter much interesting Although very much tempted rebut Als article item item common sense finally prevailed As stated own column January controversy assuming proportions far beyond its importance Al obviously disagree doubt very much either us going convince other error ways However want use some points disagreement lead two new areas significant Stunt design flying Pitching moment design reasons apparent reduced tension outsides Al seeking remedies flight Boy can feel howls protest about 50% already starting fill mail box support theories Al submitted two drawings propeller wing sec AOJA 50 LBSX tions both wings same aero dynamic angle attack ie angle relative wind chord line wing wing achieved angle through deflection flaps other through pitching unflapped wing nose-high point flapped wing achieved angle attack pitching aircraft thus aircraft would turn ever changing its geometric angle attack ie angle aircraft itself strikes relative wind conse quence would P-factor influences would never generated Curiously never addresses un flapped wing obviously nose-high attitude thus generating P-effects haps rudder should work way flapped Stunters other way unflapped ones Sorry cheap shot apparent conclusion sup posed draw lift causes What has pitching moment got line tension its iong story d coiumn aircraft body angle change Well anyone really feels aircraft Continued page 162 Nose detaii L Marc Lavaiettes OS 45-powered Panter its paint scheme reminiscent Lea McDonaids Stiiletosred/white/ biue/sliver/beautifui Photo Ciaus Maikis new F2B World Champion Zhu Younan R Peopies Republic Chna ac knowiedges cheers USAs Bob Barron eft ponders two years hence Photo Windy Urtnowski addition above drawings Charles can provide microfilm printouts 15 cents almost specific Mustang detail might need Send requests drawings other Mustang details Charle L Neely 2703 E Goshen Ave Visalia CA 93291 Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 67 flapped unflapped can make abrupt pitch change 90 achieving positive geometric angle attack body angle relative wind can certainly understand came possession beachfront prop erty hes trying palm off Take look drawing similar Als addition two pieces information two items lift vector center gravity CG major factors phenomenon known pitching moment Stunt glossary moment prod uct force applied over given dis tance fulcrum Stunt ship CG fulcrum forces applied will cause ship react about CG Ergo 50 pounds lift applied 1 inches aft CG will produce 75 inch-pounds torque about CG Weight acts upon airframe center gravity CG com petitive Stunters gas tank empty located approximately 16% aft leading edge mean chord can either take word go measure some plans did reassure myself measured Als Mustunts found 16-percenters well lift vector located center lift always point aft CG really always exceptions arent germane Stunt design center lift symmetrical airfoil located 25% mean chord cambered airfoils such symmetri cal wing flaps deflected fur ther aft varying forward maximum 25% aft maximum infinity As can see net result lift weight vectors nose-down force level flight pitching moment smallbut still exists stabilizing function tall surfaces comes play tail must supply slight download overcome negative pitching moment wings angle attack increased lift pro duced exactly equals weight air craft plus download tall stable level flight will malntained answers recurring question symmetrical non-lifting airfoil can fly straight level CG moved aft center lift moment will become destabilizing ship will fly level l-heavy experience can relate Back drawing suddenly deflect flaps square-cornered maneuver instantly dramatically increase lift vector addition since point lift centered moves aft cambered surface now have have also increased distance between CG center lift result changes dramatically increased pitching moment despite generally vertical com ponent acts behind CG will thus result aircraft pitching nose-down doubt disconnect eleva tors turn ship flaps Hint Use old airplane practice adverse pitching mo ment Stunt ship overcome very powerful horizontal tall surfaces coupled flaps rotate ship about center gravity desired body angle. coincidentally achieving posi tive body-angle relative wind thus introducing necessary prerequisites P-effects become factor Heh heh heh Snuck didnt Lets make some general statements flaps foregoing mind First flaps increase lift turn airplane fact retard rate turn ship stable pitch axis ie CG ahead center lift Second since increase lift primary advantage Stunter allow Continued page 164 ENGINEERING 201 SE l2thStreet Pompano Beach FL 33060 305-785-7978 THE tANDING GEAB PEOPLE Tired kit landing gears dont lit biggie properly tI & 0 Engineena can 010 problems * Custom built needs & specs guaranteed lit * Strong & durable withstand toughoet aiding * It & 0 Engineeriog gear will work & keep biggie hying * In stock replacoinent gear tar popular models Byron PItIs Chnsten Eagle CAP 21 Balsa liSA J3 CUB Air Tach Pawn Eagle Nose Big Stick Champ Citabria B & B models Snapper Stinger Snapper Too 162 Model Aviation P0 OOX 3957TORRANCE CA 90510 FA RUBBER Sizes1I43116l/83I32 1116 1mm thick 042 Boxed 16 oz rubber per box Price $1250 per box ppd USA Calif residents add 6% sales taxi Coupe VIII $2395 plus UPS Finished prop- Very very comptete SEND 50 FOR 190411905 CATALOG FAI Model Supply NEWNEWNEW 1/5 SCALE 4/STROKE ENGINES WACO HKS-7 7481 2-4/STR ENG GREAT LAKES TRAINER 6490-4ISTR ENG GREAT LAKES SPECIAL 6490-4/STR ENG PLANS FG COWLS ECONO-PAC $45 ALSOALSOALSO 1/4 GIANT SCALE BIG ENGINES WACO I-IKS-7 997525-4 ENG GREAT LAKES SPECIAL802-25 ENG GREAT LAKES TRAINER802 ENG PLANS EG COWLS FGPANTS $25 ECONO-PAC except TRAINER $49 MOREMOREMORE FARMAN MOUSTIGUE 1/4 SCALE/80/40 4/STR NEWNEWNEW 2 ANTIQUE RIO MODELS BILL WINTERS ROOKIE 7240-60/4 5TH DEBOLTS LIVE WIRE TRAINER 25% 60 SPAN 21-40 4/STR ENG PLANS e three 0 ordera PP CONT USA NYS Rex 8% Tax ASE tor Brochure NORM ROSENSTOCK 94 CEDAR DRIVE PLAINVIEW NY 11803 us fly heavier airplane high G-loads exceeding lift capability wing Note entirely possible generate lift required flaps larger necessary deflected needed case suffer consequences lots negative pitching moment gaining nothing value Therefore purpose make tighter cornering possible ideal flap should no larger necessary pro vide lift required radius corner desired have thereby kept adverse pitching moment mini mum turn will reduce force required tail produce desired rapid change pitch Got New subject very root dif ference opinion Al some others about P-factor gyroscopic preces sion forth conviction part Stunters have less line ten sion outsides insides say submit P-factor evidence reverse will admit times Stunt pattern ship seems light outsides still maintain position respect controversy come Lets examine three areas feel dis tort perception line tension Body human asymmetry Stunt-pattern asym metry maneuver placement relative wind maneuver Stunters primarily through manipulation flying hand wrist elbow shoulder fingers five components four essen tially uniform ability input Up Down control Only elbow unidirectional aiding inside maneuvers Watch good Stunt fliers will see following hand wrist fingers will provide lions share control inputs shoulder joint will change little elbow will provide control input exclusively insides addition movement elbow effectively pulls model toward thus increasing perceived line ten sion Neither forms aid. control tension. available outsides Experiment doing Inside Out side Loops Squares etc using wrist action see dont agree Stunt-pattern asymmetry sub tle problem Due rules dont accomplish similarbut reversed maneuvers same manner same starting point Only Outside Loops mirror-image Insides think will agree outside ten sion generally greater Inside Sqixre Loops start level flight turn up away already good-ten sion entry Outside Square Loops en tered position poor tension 450 flight elevation start dive wherein gravity further reducing line tension dont outside Triangles try think youll amazed improved line tension comparison insides Vertical Eight obviously discriminatory outsides done above 450 insides below Worst Hourglass wherein toughest corners whole pattern outsides done least advantageous positions directly overhead Finally consider what flown-out-of-maneuver pattern bar Thats right first loop Four Leaf Clover. time entire pattern ship required inside maneuver above 450 except overheads Wheres precession really need Now stop Fancher Finally fliers maneuver placement relative wind has serious effect outside portions Figure Eights Four Leaf Clover rule book requires inside por tion Figure Eights first inside Clover performed first fliers natural inclination insure safe entry maneuvers result will bias entry left dead downwind insures comple tion first inside sometimes essential Four Leaf puts successful completion outside portions jeopardy will performed en tirely left downwind inter sections held Again dont take word Watch some Stunt patterns flown breeze letting pur pose known see aint true Okay Ive got armor Let have havent plugged PAMPA lately fly Stunt havent joined Precision Aerobatic Model Pilots Association youre missing half fun Contact Doug Figgs 329 Lincoln Place Brooklyn NY 11238 Dues $1500 annually worth Fly Stunt Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Sped/HempeI Continued page 68 Dont silent about new rules pro posals Read summaries Octo ber November December 1984 issues Mpdel Aviation write Distrt Control Line Contest Board member Gene Hempel 301 N Yale Dr Garland TX 75042 Sharing Reach out help someone Like fledgling young old Dont let good deed go undone Bring another modeler fold Lou Roberts 164 Model Aviation I
Edition: Model Aviation - 1985/04
Page Numbers: 67, 162, 164
Control Line eroba tics Ted Fancher WOW knew contributing editors gained enormous influence result monthly blatherings never would have guessed could bring dead back life Al Rabe no less mid-season form See CL Stunt Design MA January 1985 seems toss-off column P-factor has become almost cause celebre amongst Stunt aficionados proving selves much sophisticated aerodynamic puzzles adult divertissements grown-ups toys ever would have guessed Very pleasing encouraging opens door future subject matter much interesting Although very much tempted rebut Als article item item common sense finally prevailed As stated own column January controversy assuming proportions far beyond its importance Al obviously disagree doubt very much either us going convince other error ways However want use some points disagreement lead two new areas significant Stunt design flying Pitching moment design reasons apparent reduced tension outsides Al seeking remedies flight Boy can feel howls protest about 50% already starting fill mail box support theories Al submitted two drawings propeller wing sec AOJA 50 LBSX tions both wings same aero dynamic angle attack ie angle relative wind chord line wing wing achieved angle through deflection flaps other through pitching unflapped wing nose-high point flapped wing achieved angle attack pitching aircraft thus aircraft would turn ever changing its geometric angle attack ie angle aircraft itself strikes relative wind conse quence would P-factor influences would never generated Curiously never addresses un flapped wing obviously nose-high attitude thus generating P-effects haps rudder should work way flapped Stunters other way unflapped ones Sorry cheap shot apparent conclusion sup posed draw lift causes What has pitching moment got line tension its iong story d coiumn aircraft body angle change Well anyone really feels aircraft Continued page 162 Nose detaii L Marc Lavaiettes OS 45-powered Panter its paint scheme reminiscent Lea McDonaids Stiiletosred/white/ biue/sliver/beautifui Photo Ciaus Maikis new F2B World Champion Zhu Younan R Peopies Republic Chna ac knowiedges cheers USAs Bob Barron eft ponders two years hence Photo Windy Urtnowski addition above drawings Charles can provide microfilm printouts 15 cents almost specific Mustang detail might need Send requests drawings other Mustang details Charle L Neely 2703 E Goshen Ave Visalia CA 93291 Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 67 flapped unflapped can make abrupt pitch change 90 achieving positive geometric angle attack body angle relative wind can certainly understand came possession beachfront prop erty hes trying palm off Take look drawing similar Als addition two pieces information two items lift vector center gravity CG major factors phenomenon known pitching moment Stunt glossary moment prod uct force applied over given dis tance fulcrum Stunt ship CG fulcrum forces applied will cause ship react about CG Ergo 50 pounds lift applied 1 inches aft CG will produce 75 inch-pounds torque about CG Weight acts upon airframe center gravity CG com petitive Stunters gas tank empty located approximately 16% aft leading edge mean chord can either take word go measure some plans did reassure myself measured Als Mustunts found 16-percenters well lift vector located center lift always point aft CG really always exceptions arent germane Stunt design center lift symmetrical airfoil located 25% mean chord cambered airfoils such symmetri cal wing flaps deflected fur ther aft varying forward maximum 25% aft maximum infinity As can see net result lift weight vectors nose-down force level flight pitching moment smallbut still exists stabilizing function tall surfaces comes play tail must supply slight download overcome negative pitching moment wings angle attack increased lift pro duced exactly equals weight air craft plus download tall stable level flight will malntained answers recurring question symmetrical non-lifting airfoil can fly straight level CG moved aft center lift moment will become destabilizing ship will fly level l-heavy experience can relate Back drawing suddenly deflect flaps square-cornered maneuver instantly dramatically increase lift vector addition since point lift centered moves aft cambered surface now have have also increased distance between CG center lift result changes dramatically increased pitching moment despite generally vertical com ponent acts behind CG will thus result aircraft pitching nose-down doubt disconnect eleva tors turn ship flaps Hint Use old airplane practice adverse pitching mo ment Stunt ship overcome very powerful horizontal tall surfaces coupled flaps rotate ship about center gravity desired body angle. coincidentally achieving posi tive body-angle relative wind thus introducing necessary prerequisites P-effects become factor Heh heh heh Snuck didnt Lets make some general statements flaps foregoing mind First flaps increase lift turn airplane fact retard rate turn ship stable pitch axis ie CG ahead center lift Second since increase lift primary advantage Stunter allow Continued page 164 ENGINEERING 201 SE l2thStreet Pompano Beach FL 33060 305-785-7978 THE tANDING GEAB PEOPLE Tired kit landing gears dont lit biggie properly tI & 0 Engineena can 010 problems * Custom built needs & specs guaranteed lit * Strong & durable withstand toughoet aiding * It & 0 Engineeriog gear will work & keep biggie hying * In stock replacoinent gear tar popular models Byron PItIs Chnsten Eagle CAP 21 Balsa liSA J3 CUB Air Tach Pawn Eagle Nose Big Stick Champ Citabria B & B models Snapper Stinger Snapper Too 162 Model Aviation P0 OOX 3957TORRANCE CA 90510 FA RUBBER Sizes1I43116l/83I32 1116 1mm thick 042 Boxed 16 oz rubber per box Price $1250 per box ppd USA Calif residents add 6% sales taxi Coupe VIII $2395 plus UPS Finished prop- Very very comptete SEND 50 FOR 190411905 CATALOG FAI Model Supply NEWNEWNEW 1/5 SCALE 4/STROKE ENGINES WACO HKS-7 7481 2-4/STR ENG GREAT LAKES TRAINER 6490-4ISTR ENG GREAT LAKES SPECIAL 6490-4/STR ENG PLANS FG COWLS ECONO-PAC $45 ALSOALSOALSO 1/4 GIANT SCALE BIG ENGINES WACO I-IKS-7 997525-4 ENG GREAT LAKES SPECIAL802-25 ENG GREAT LAKES TRAINER802 ENG PLANS EG COWLS FGPANTS $25 ECONO-PAC except TRAINER $49 MOREMOREMORE FARMAN MOUSTIGUE 1/4 SCALE/80/40 4/STR NEWNEWNEW 2 ANTIQUE RIO MODELS BILL WINTERS ROOKIE 7240-60/4 5TH DEBOLTS LIVE WIRE TRAINER 25% 60 SPAN 21-40 4/STR ENG PLANS e three 0 ordera PP CONT USA NYS Rex 8% Tax ASE tor Brochure NORM ROSENSTOCK 94 CEDAR DRIVE PLAINVIEW NY 11803 us fly heavier airplane high G-loads exceeding lift capability wing Note entirely possible generate lift required flaps larger necessary deflected needed case suffer consequences lots negative pitching moment gaining nothing value Therefore purpose make tighter cornering possible ideal flap should no larger necessary pro vide lift required radius corner desired have thereby kept adverse pitching moment mini mum turn will reduce force required tail produce desired rapid change pitch Got New subject very root dif ference opinion Al some others about P-factor gyroscopic preces sion forth conviction part Stunters have less line ten sion outsides insides say submit P-factor evidence reverse will admit times Stunt pattern ship seems light outsides still maintain position respect controversy come Lets examine three areas feel dis tort perception line tension Body human asymmetry Stunt-pattern asym metry maneuver placement relative wind maneuver Stunters primarily through manipulation flying hand wrist elbow shoulder fingers five components four essen tially uniform ability input Up Down control Only elbow unidirectional aiding inside maneuvers Watch good Stunt fliers will see following hand wrist fingers will provide lions share control inputs shoulder joint will change little elbow will provide control input exclusively insides addition movement elbow effectively pulls model toward thus increasing perceived line ten sion Neither forms aid. control tension. available outsides Experiment doing Inside Out side Loops Squares etc using wrist action see dont agree Stunt-pattern asymmetry sub tle problem Due rules dont accomplish similarbut reversed maneuvers same manner same starting point Only Outside Loops mirror-image Insides think will agree outside ten sion generally greater Inside Sqixre Loops start level flight turn up away already good-ten sion entry Outside Square Loops en tered position poor tension 450 flight elevation start dive wherein gravity further reducing line tension dont outside Triangles try think youll amazed improved line tension comparison insides Vertical Eight obviously discriminatory outsides done above 450 insides below Worst Hourglass wherein toughest corners whole pattern outsides done least advantageous positions directly overhead Finally consider what flown-out-of-maneuver pattern bar Thats right first loop Four Leaf Clover. time entire pattern ship required inside maneuver above 450 except overheads Wheres precession really need Now stop Fancher Finally fliers maneuver placement relative wind has serious effect outside portions Figure Eights Four Leaf Clover rule book requires inside por tion Figure Eights first inside Clover performed first fliers natural inclination insure safe entry maneuvers result will bias entry left dead downwind insures comple tion first inside sometimes essential Four Leaf puts successful completion outside portions jeopardy will performed en tirely left downwind inter sections held Again dont take word Watch some Stunt patterns flown breeze letting pur pose known see aint true Okay Ive got armor Let have havent plugged PAMPA lately fly Stunt havent joined Precision Aerobatic Model Pilots Association youre missing half fun Contact Doug Figgs 329 Lincoln Place Brooklyn NY 11238 Dues $1500 annually worth Fly Stunt Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Sped/HempeI Continued page 68 Dont silent about new rules pro posals Read summaries Octo ber November December 1984 issues Mpdel Aviation write Distrt Control Line Contest Board member Gene Hempel 301 N Yale Dr Garland TX 75042 Sharing Reach out help someone Like fledgling young old Dont let good deed go undone Bring another modeler fold Lou Roberts 164 Model Aviation I
Edition: Model Aviation - 1985/04
Page Numbers: 67, 162, 164
Control Line eroba tics Ted Fancher WOW knew contributing editors gained enormous influence result monthly blatherings never would have guessed could bring dead back life Al Rabe no less mid-season form See CL Stunt Design MA January 1985 seems toss-off column P-factor has become almost cause celebre amongst Stunt aficionados proving selves much sophisticated aerodynamic puzzles adult divertissements grown-ups toys ever would have guessed Very pleasing encouraging opens door future subject matter much interesting Although very much tempted rebut Als article item item common sense finally prevailed As stated own column January controversy assuming proportions far beyond its importance Al obviously disagree doubt very much either us going convince other error ways However want use some points disagreement lead two new areas significant Stunt design flying Pitching moment design reasons apparent reduced tension outsides Al seeking remedies flight Boy can feel howls protest about 50% already starting fill mail box support theories Al submitted two drawings propeller wing sec AOJA 50 LBSX tions both wings same aero dynamic angle attack ie angle relative wind chord line wing wing achieved angle through deflection flaps other through pitching unflapped wing nose-high point flapped wing achieved angle attack pitching aircraft thus aircraft would turn ever changing its geometric angle attack ie angle aircraft itself strikes relative wind conse quence would P-factor influences would never generated Curiously never addresses un flapped wing obviously nose-high attitude thus generating P-effects haps rudder should work way flapped Stunters other way unflapped ones Sorry cheap shot apparent conclusion sup posed draw lift causes What has pitching moment got line tension its iong story d coiumn aircraft body angle change Well anyone really feels aircraft Continued page 162 Nose detaii L Marc Lavaiettes OS 45-powered Panter its paint scheme reminiscent Lea McDonaids Stiiletosred/white/ biue/sliver/beautifui Photo Ciaus Maikis new F2B World Champion Zhu Younan R Peopies Republic Chna ac knowiedges cheers USAs Bob Barron eft ponders two years hence Photo Windy Urtnowski addition above drawings Charles can provide microfilm printouts 15 cents almost specific Mustang detail might need Send requests drawings other Mustang details Charle L Neely 2703 E Goshen Ave Visalia CA 93291 Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 67 flapped unflapped can make abrupt pitch change 90 achieving positive geometric angle attack body angle relative wind can certainly understand came possession beachfront prop erty hes trying palm off Take look drawing similar Als addition two pieces information two items lift vector center gravity CG major factors phenomenon known pitching moment Stunt glossary moment prod uct force applied over given dis tance fulcrum Stunt ship CG fulcrum forces applied will cause ship react about CG Ergo 50 pounds lift applied 1 inches aft CG will produce 75 inch-pounds torque about CG Weight acts upon airframe center gravity CG com petitive Stunters gas tank empty located approximately 16% aft leading edge mean chord can either take word go measure some plans did reassure myself measured Als Mustunts found 16-percenters well lift vector located center lift always point aft CG really always exceptions arent germane Stunt design center lift symmetrical airfoil located 25% mean chord cambered airfoils such symmetri cal wing flaps deflected fur ther aft varying forward maximum 25% aft maximum infinity As can see net result lift weight vectors nose-down force level flight pitching moment smallbut still exists stabilizing function tall surfaces comes play tail must supply slight download overcome negative pitching moment wings angle attack increased lift pro duced exactly equals weight air craft plus download tall stable level flight will malntained answers recurring question symmetrical non-lifting airfoil can fly straight level CG moved aft center lift moment will become destabilizing ship will fly level l-heavy experience can relate Back drawing suddenly deflect flaps square-cornered maneuver instantly dramatically increase lift vector addition since point lift centered moves aft cambered surface now have have also increased distance between CG center lift result changes dramatically increased pitching moment despite generally vertical com ponent acts behind CG will thus result aircraft pitching nose-down doubt disconnect eleva tors turn ship flaps Hint Use old airplane practice adverse pitching mo ment Stunt ship overcome very powerful horizontal tall surfaces coupled flaps rotate ship about center gravity desired body angle. coincidentally achieving posi tive body-angle relative wind thus introducing necessary prerequisites P-effects become factor Heh heh heh Snuck didnt Lets make some general statements flaps foregoing mind First flaps increase lift turn airplane fact retard rate turn ship stable pitch axis ie CG ahead center lift Second since increase lift primary advantage Stunter allow Continued page 164 ENGINEERING 201 SE l2thStreet Pompano Beach FL 33060 305-785-7978 THE tANDING GEAB PEOPLE Tired kit landing gears dont lit biggie properly tI & 0 Engineena can 010 problems * Custom built needs & specs guaranteed lit * Strong & durable withstand toughoet aiding * It & 0 Engineeriog gear will work & keep biggie hying * In stock replacoinent gear tar popular models Byron PItIs Chnsten Eagle CAP 21 Balsa liSA J3 CUB Air Tach Pawn Eagle Nose Big Stick Champ Citabria B & B models Snapper Stinger Snapper Too 162 Model Aviation P0 OOX 3957TORRANCE CA 90510 FA RUBBER Sizes1I43116l/83I32 1116 1mm thick 042 Boxed 16 oz rubber per box Price $1250 per box ppd USA Calif residents add 6% sales taxi Coupe VIII $2395 plus UPS Finished prop- Very very comptete SEND 50 FOR 190411905 CATALOG FAI Model Supply NEWNEWNEW 1/5 SCALE 4/STROKE ENGINES WACO HKS-7 7481 2-4/STR ENG GREAT LAKES TRAINER 6490-4ISTR ENG GREAT LAKES SPECIAL 6490-4/STR ENG PLANS FG COWLS ECONO-PAC $45 ALSOALSOALSO 1/4 GIANT SCALE BIG ENGINES WACO I-IKS-7 997525-4 ENG GREAT LAKES SPECIAL802-25 ENG GREAT LAKES TRAINER802 ENG PLANS EG COWLS FGPANTS $25 ECONO-PAC except TRAINER $49 MOREMOREMORE FARMAN MOUSTIGUE 1/4 SCALE/80/40 4/STR NEWNEWNEW 2 ANTIQUE RIO MODELS BILL WINTERS ROOKIE 7240-60/4 5TH DEBOLTS LIVE WIRE TRAINER 25% 60 SPAN 21-40 4/STR ENG PLANS e three 0 ordera PP CONT USA NYS Rex 8% Tax ASE tor Brochure NORM ROSENSTOCK 94 CEDAR DRIVE PLAINVIEW NY 11803 us fly heavier airplane high G-loads exceeding lift capability wing Note entirely possible generate lift required flaps larger necessary deflected needed case suffer consequences lots negative pitching moment gaining nothing value Therefore purpose make tighter cornering possible ideal flap should no larger necessary pro vide lift required radius corner desired have thereby kept adverse pitching moment mini mum turn will reduce force required tail produce desired rapid change pitch Got New subject very root dif ference opinion Al some others about P-factor gyroscopic preces sion forth conviction part Stunters have less line ten sion outsides insides say submit P-factor evidence reverse will admit times Stunt pattern ship seems light outsides still maintain position respect controversy come Lets examine three areas feel dis tort perception line tension Body human asymmetry Stunt-pattern asym metry maneuver placement relative wind maneuver Stunters primarily through manipulation flying hand wrist elbow shoulder fingers five components four essen tially uniform ability input Up Down control Only elbow unidirectional aiding inside maneuvers Watch good Stunt fliers will see following hand wrist fingers will provide lions share control inputs shoulder joint will change little elbow will provide control input exclusively insides addition movement elbow effectively pulls model toward thus increasing perceived line ten sion Neither forms aid. control tension. available outsides Experiment doing Inside Out side Loops Squares etc using wrist action see dont agree Stunt-pattern asymmetry sub tle problem Due rules dont accomplish similarbut reversed maneuvers same manner same starting point Only Outside Loops mirror-image Insides think will agree outside ten sion generally greater Inside Sqixre Loops start level flight turn up away already good-ten sion entry Outside Square Loops en tered position poor tension 450 flight elevation start dive wherein gravity further reducing line tension dont outside Triangles try think youll amazed improved line tension comparison insides Vertical Eight obviously discriminatory outsides done above 450 insides below Worst Hourglass wherein toughest corners whole pattern outsides done least advantageous positions directly overhead Finally consider what flown-out-of-maneuver pattern bar Thats right first loop Four Leaf Clover. time entire pattern ship required inside maneuver above 450 except overheads Wheres precession really need Now stop Fancher Finally fliers maneuver placement relative wind has serious effect outside portions Figure Eights Four Leaf Clover rule book requires inside por tion Figure Eights first inside Clover performed first fliers natural inclination insure safe entry maneuvers result will bias entry left dead downwind insures comple tion first inside sometimes essential Four Leaf puts successful completion outside portions jeopardy will performed en tirely left downwind inter sections held Again dont take word Watch some Stunt patterns flown breeze letting pur pose known see aint true Okay Ive got armor Let have havent plugged PAMPA lately fly Stunt havent joined Precision Aerobatic Model Pilots Association youre missing half fun Contact Doug Figgs 329 Lincoln Place Brooklyn NY 11238 Dues $1500 annually worth Fly Stunt Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Sped/HempeI Continued page 68 Dont silent about new rules pro posals Read summaries Octo ber November December 1984 issues Mpdel Aviation write Distrt Control Line Contest Board member Gene Hempel 301 N Yale Dr Garland TX 75042 Sharing Reach out help someone Like fledgling young old Dont let good deed go undone Bring another modeler fold Lou Roberts 164 Model Aviation I