CONTROL LINE AEROBATICS U ~Ti1 n previous column discussed importance trimming wings level relates getting airplane fly well adjustment models has impact interrelated also has range zone similar what sports people use reference adjustment out zone its difficult really tune others youre close zone general trimming process reasonably linear reason experts have less trouble initially trimming new model initially preflightpretrim airplane known reasonable settings adjustable features adjustment want discuss center gravity CG Ive written about wing CC speak column tip weight/leveling wings now Ill focus fore/aft CC first point much fore/aft CC can affect airplanes performance also range adjustment other adjustments work need able recognize symptoms out range ome airplanes range can extremely smallsometimes few grams can show effect Aldrich Magnum experiencing slight tracking problem inverted flight tried three-gram increase nose weight tracking improved corner seriously reduced pulled weight corner returned first conditiona forward CC nose-heavinessisnt too bad except extreme years forward CC used gain line tension soften turn wasnt horsepower recent technology early 35-size models Some designs minimum wing area large flaps benefitted forward CC allowed/required elevator deflection turn airplane corresponding large flap deflection hence lift Following some traits look have CC too far forward firsta rock-stable groove level flightis bad second associated nice tracking positive rounds bottoms cornering maneuvers few fliers through years such Jim Casale Bob Baron have favored nose-heavy trim have done well us normal fliers presents problems wind airplane pushes tends stay track probably result additional factors combined nose-heavy trim have experienced wind setup have very disciplined hang ever-increasing control pressures required turn airplane properly Thats problem really stresses pilot However some ways moderate control pressures increase mechanical advantage using larger bellcranks wider handle spacing longer horns Bob Baron does well using widest handle spacing anyone currently flying Al Rabe used very wide spacing semiscale Mustangs measured handle used Martin Baker 5/2 inches recommend avoiding dead noseheavy trim general flier looking overall setup serves conditions pilot can experience nose-heavy setup can cause flier very apprehensive about wind increasing control force Dont discount havent felt its real have lost models being able handle situation Worse yet dont fly wind inhibits competitive process other extreme CC out-of-range rearward position can insidious situation because current designs long tail moments large tail volumes stabilizer/elevator areas 24%-plus range accurately-built models track well corner generally seem fly well also exhibit light control pressures problems arise trying trim condition CC out range model will tend roll inward turned danger youre Larry Shoemakers Springfield MO Old-Time American Seniors Michael Ames Stunterown-design Golden Age racer 1934 Adjustable leadouts weight box PowerVeco 35 McCoy 35 Gilmore Lion Fully aerobatic Stalker pro 61 RE 725 sq November 1998 129 Brian Kieffer proudly displays new Intrepid XL Powered Precision Aero 51 pipe model flies extremely well Czech-MP JET 061 Plain Bearing Glow500065006000 Ball Bearing Glow 650070007500 Ball Bearing Diesel 650070007500 engines include silencer Add $500 P&H per Order Vise & M/C OK 76Wd C4C Sddn ae4 Carison Engine Imports- 814 E Marconi Ave Phoenix Az USA 85022- Ph/Fax 602-863-1684 CUSTOM LETTER TODAY.THE VINYL WRITE WAY IXZIE7fl MM ages Since 1987 mail order company providing modeler EZ apply custom lettering logos stars etc choices type styles & colors decal custom cut pre-aligned & pre-spaced premium vinyl planes boats trains toys etc Heights 1/4 12 Priced right eg AMA er 1 high $250. color style Find out what can foryou S ample infopack free Please include #10 SASE inquiries 16043 TULSA STREET GRANADA HILLS CA 91344 818-363-7131 Mon Thur 1O-4pm PST E-Mail vinylrt@relaypointnet Plus $2 P/H Ca res add tax recognizing probtem CG problem start correct other changes such tip weight flap tweaks have done see other fliers models start chasing good setting no combination works satisfaction Nothing seems linear clue look CG Start moving forward nose weight shoutd see rolling tendency going away get range point will probably have retrim now process will linear Remember wont run problems follow designers instructions us dont Its macho Products It doesnt seem possible its two years since Bob Hunt first issued Stunt Flyer Video Magazine subjects interest usually visits famous famous Bob puts interest how-to features have become foundation magazine last issue includes visit famous personalities StuntBob Gialdini recounts early modeling days fascinating piece others make up wonderful documentation history modeling Bob Hunt has said will donate set AMA museum preservation As technical subject issue Bob continues construction sample Stunt machine demonstrate certain techniques subject proper carving fuselage blocks its useful builders types models have ever noticed particularly nice model things distinguishes flowing lines shapes Conversely merely rounding edges confirms less-thanknowledgeable craftsman Bob does excellent job proceeding through transferring plan shapes blocks establishing successful sequence significant portion describes detail use various sanding tools achieve desired shapes format how-to Stunt Flyer Video Magazine valuable ongoing reference source recommend videos model builders Contact Robins View Production Box 68 Stockertown PA 18083 Tel 610 7469638 Tips I have trouble stencil residue Im working new model adhesive softens remains surface difficult remove Ive tried Sikrens M-600 Prepsol etc mixed results nothing effective However Bill Werwage mentioned 3MTM product General Purpose Adhesive Cleaner part no051135-08984 works extremely well Also try hingesealing tape remove tape residue useful technique apply cleaner QTipTM point tape separating hinge line Slowly work along hinge line tape will come up cleaner contacts adhesive careful foam wings however will melt foam Check cleaner local auto body store Wrigley Way Milpitas California 95035 Voice/Fax 408 946-4751 408 WINGS-SI dCTS LOOK no further far fully molded sailplane needs RnR offer selection high performance sailplanes will address specific requirements F3BThermal Duration Slope Cross Country Mark Allen designed World Championship F3B EAGLE now being produced RnR its new lower price RnR sailplane enjoys design construction enhancements 1997 RnRs composite molded technology provides unique blend strength weight optimization Noticeable results found through increased durability torsional stability stiffness incorporated wing fuselage tail section also offer selection parts joiner systems scratch builders out catch latest visuals specifications competitive pricing RnRs sailplanes contact RnR RnR skys limit. 130 Model Aviation e 1936
Edition: Model Aviation - 1998/11
Page Numbers: 129, 130
Edition: Model Aviation - 1998/11
Page Numbers: 129, 130
CONTROL LINE AEROBATICS U ~Ti1 n previous column discussed importance trimming wings level relates getting airplane fly well adjustment models has impact interrelated also has range zone similar what sports people use reference adjustment out zone its difficult really tune others youre close zone general trimming process reasonably linear reason experts have less trouble initially trimming new model initially preflightpretrim airplane known reasonable settings adjustable features adjustment want discuss center gravity CG Ive written about wing CC speak column tip weight/leveling wings now Ill focus fore/aft CC first point much fore/aft CC can affect airplanes performance also range adjustment other adjustments work need able recognize symptoms out range ome airplanes range can extremely smallsometimes few grams can show effect Aldrich Magnum experiencing slight tracking problem inverted flight tried three-gram increase nose weight tracking improved corner seriously reduced pulled weight corner returned first conditiona forward CC nose-heavinessisnt too bad except extreme years forward CC used gain line tension soften turn wasnt horsepower recent technology early 35-size models Some designs minimum wing area large flaps benefitted forward CC allowed/required elevator deflection turn airplane corresponding large flap deflection hence lift Following some traits look have CC too far forward firsta rock-stable groove level flightis bad second associated nice tracking positive rounds bottoms cornering maneuvers few fliers through years such Jim Casale Bob Baron have favored nose-heavy trim have done well us normal fliers presents problems wind airplane pushes tends stay track probably result additional factors combined nose-heavy trim have experienced wind setup have very disciplined hang ever-increasing control pressures required turn airplane properly Thats problem really stresses pilot However some ways moderate control pressures increase mechanical advantage using larger bellcranks wider handle spacing longer horns Bob Baron does well using widest handle spacing anyone currently flying Al Rabe used very wide spacing semiscale Mustangs measured handle used Martin Baker 5/2 inches recommend avoiding dead noseheavy trim general flier looking overall setup serves conditions pilot can experience nose-heavy setup can cause flier very apprehensive about wind increasing control force Dont discount havent felt its real have lost models being able handle situation Worse yet dont fly wind inhibits competitive process other extreme CC out-of-range rearward position can insidious situation because current designs long tail moments large tail volumes stabilizer/elevator areas 24%-plus range accurately-built models track well corner generally seem fly well also exhibit light control pressures problems arise trying trim condition CC out range model will tend roll inward turned danger youre Larry Shoemakers Springfield MO Old-Time American Seniors Michael Ames Stunterown-design Golden Age racer 1934 Adjustable leadouts weight box PowerVeco 35 McCoy 35 Gilmore Lion Fully aerobatic Stalker pro 61 RE 725 sq November 1998 129 Brian Kieffer proudly displays new Intrepid XL Powered Precision Aero 51 pipe model flies extremely well Czech-MP JET 061 Plain Bearing Glow500065006000 Ball Bearing Glow 650070007500 Ball Bearing Diesel 650070007500 engines include silencer Add $500 P&H per Order Vise & M/C OK 76Wd C4C Sddn ae4 Carison Engine Imports- 814 E Marconi Ave Phoenix Az USA 85022- Ph/Fax 602-863-1684 CUSTOM LETTER TODAY.THE VINYL WRITE WAY IXZIE7fl MM ages Since 1987 mail order company providing modeler EZ apply custom lettering logos stars etc choices type styles & colors decal custom cut pre-aligned & pre-spaced premium vinyl planes boats trains toys etc Heights 1/4 12 Priced right eg AMA er 1 high $250. color style Find out what can foryou S ample infopack free Please include #10 SASE inquiries 16043 TULSA STREET GRANADA HILLS CA 91344 818-363-7131 Mon Thur 1O-4pm PST E-Mail vinylrt@relaypointnet Plus $2 P/H Ca res add tax recognizing probtem CG problem start correct other changes such tip weight flap tweaks have done see other fliers models start chasing good setting no combination works satisfaction Nothing seems linear clue look CG Start moving forward nose weight shoutd see rolling tendency going away get range point will probably have retrim now process will linear Remember wont run problems follow designers instructions us dont Its macho Products It doesnt seem possible its two years since Bob Hunt first issued Stunt Flyer Video Magazine subjects interest usually visits famous famous Bob puts interest how-to features have become foundation magazine last issue includes visit famous personalities StuntBob Gialdini recounts early modeling days fascinating piece others make up wonderful documentation history modeling Bob Hunt has said will donate set AMA museum preservation As technical subject issue Bob continues construction sample Stunt machine demonstrate certain techniques subject proper carving fuselage blocks its useful builders types models have ever noticed particularly nice model things distinguishes flowing lines shapes Conversely merely rounding edges confirms less-thanknowledgeable craftsman Bob does excellent job proceeding through transferring plan shapes blocks establishing successful sequence significant portion describes detail use various sanding tools achieve desired shapes format how-to Stunt Flyer Video Magazine valuable ongoing reference source recommend videos model builders Contact Robins View Production Box 68 Stockertown PA 18083 Tel 610 7469638 Tips I have trouble stencil residue Im working new model adhesive softens remains surface difficult remove Ive tried Sikrens M-600 Prepsol etc mixed results nothing effective However Bill Werwage mentioned 3MTM product General Purpose Adhesive Cleaner part no051135-08984 works extremely well Also try hingesealing tape remove tape residue useful technique apply cleaner QTipTM point tape separating hinge line Slowly work along hinge line tape will come up cleaner contacts adhesive careful foam wings however will melt foam Check cleaner local auto body store Wrigley Way Milpitas California 95035 Voice/Fax 408 946-4751 408 WINGS-SI dCTS LOOK no further far fully molded sailplane needs RnR offer selection high performance sailplanes will address specific requirements F3BThermal Duration Slope Cross Country Mark Allen designed World Championship F3B EAGLE now being produced RnR its new lower price RnR sailplane enjoys design construction enhancements 1997 RnRs composite molded technology provides unique blend strength weight optimization Noticeable results found through increased durability torsional stability stiffness incorporated wing fuselage tail section also offer selection parts joiner systems scratch builders out catch latest visuals specifications competitive pricing RnRs sailplanes contact RnR RnR skys limit. 130 Model Aviation e 1936
