CONTROL LINE AEROBATICS 1 d II F 1 I U l II J U 1 difficult rewarding challenges Stunt work another fliers airplane get fly its potential Much has written about trimming surprising much ignored misunderstood wish magic wand could wave would make airplane fly Nationals level isnt areas adjust fliers start plan orderly approach having plan best way best method systematically trimming airplane Paul Walkers article Impact published Flying Models Reprints available through PAMPA Precision Aerobatic Model Pilots Association services Box 2026 Loomis CA 95650-2026 last few years Ive flying other peoples airplanes common theme handle neutral setting rather lack good neutral setting may seem small issue after everyone different politically correct era Some time ago Bill Werwage flying Classic models remarked airplanes flies seem two basic settings angled setting much pistol grip vertical grip might ask whats big deal fliers have chosen hold hands naturally chosestill politically correct problem can arise misaligned handle setting itself can cause misinterpretation trim airplane biasing neutral set up mechanical advantage causes control sensitive/quicker direction Usually up control because handle often canted forward top pushed forward Consider constructing model spent considerable time effort get Junior Flite Streak kit prototype 15 size Brodak George controls neutral Aldrich design come 35 trainer versions surfaces set neutral controls controls latest tricks alignments insure surfaces faithfully followed inputs However after work make controls linear handle setting can destroy linearity Ive finally gotten real dealthe system linearity dont follow through aspect can expect problems Back handle models get try usually have handle set forward have flown several handle rotated airplanes extremely difficult fly level let alone put through pattern safely observation admittedly result being used vertical setting However no question up very sensitive down almost required pulling handle get safe outside corner may sound Im exaggerating Im situation really does prevent flying airplane well prefer vertical setting handle Ive mentioned several times during last few years what shooting handle setting equal pressure control force/feel apply up down assumptionand realize always sois vertical setting brings equal turn practice good patterns need strive honest equal turw cannot fly uniform maneuvers October 1998 135 Brian Eathers latest example Firecracker design powered Precision Aero 51 has own propeller tuned pipe Father son team Darrel Ryan Gronto Dallas TX Texarkana contest Ryan fourth Jr Beginner Darrel second Expert airplane set up turn same way Setting handle vertical position sounds very simple may have noticed adjusting new set lines minute variations neutral tend compensated subconsciously Indeed model specifically set handle what looked awkward up position airplane flight handle properly set particular airplane/handle always took several flights work back because handle position might have work particular setting get best feel strive position very close vertical will give optimum position base trim much same leveling wings start eliminating variations now can affect trimming program can guarantee go through trim process will have honest trim possible Thus far discussion has focused strictly physical position handle comply suggestions Ive made can simply adjust length either line basic handle has feature After youve flown setting few flights will naturally become accustomed way feels start become aware certain characteristics model airplane might tend fly inverted lower four-feet limit fly bit higher After upright can issue slight compensations youthe fliermake adjustment youre after very small experience/feel things once you will understand adjustment take care situation slight pull down line shorten say /32 inch Fly try see what effect ballpark model should settle slightly higher inverted flight Remember very fine adjustment Im fine adjustments other capabilities exist some handles Thumb wheels give ability make extremely fine adjustments flight can valuable now can look next levelthe pressure required handle turn airplane can last step extracting best trim Before look acquiring handle capability should feel comfortable basic handle having flown basic handle will probably want step up next level source Brodak s Distributing Company 100 Park Ave Carmichaels PA 15320 Tel 412 966-2726 handles come standard expert XPA expert series quality excellent using thumb wheels understand very fine adjustment discussion Im going exclude post lengths overhang also adjustable thumb wheels Im after equalizing pressure controls effect movement will take less turn experience change rotate appropriate wheel see affects feel controls its first time try wheel direction no magic can same thing thumb wheels can cable length adjustment However interchangeable because too much thumb wheel can angle bar front handle causing unequal post length changes linearity control input Its best use fine adjustment keep bar same angle basic handlevertical discussion should give some insight making airplane work up its potential Dont reluctant work adjustments can try fun exploring CL ScaleIBoss Continued page 133 overall structure 5- 30-minute epoxy areas requiring stiffening additional strength Epoxy used couple ways first firewall construction mounting engine landing gear servos bellcranks other place would use plywood hardwood can make equivalent plywood hardwood laminating heavy corrugated material mix batch 30-minute epoxy pour open flute ends take 1/s-inchthick diameter wire piece coat hanger will push epoxy flutes twirling action will put coating inside paper material adding considerable strength ultimate strengthening fill flutes solid epoxy needed fully hardened can drilled mounting bolts youre mind fill corrugated material epoxy can epoxy plywood hardwood mounting servos bellcranks etc second important use epoxy glues coat entire area paper other type construction model would come contact fuel have covered considerable amount month Next month Ill talk about covering models structure detailing Ill leave Elmers paper white glue until Wanted anyone out would like part old McCoy 60 AJ Hetzel Jr wants fly New Items As has done times before Randy Smith Aero Products has introduced item help competitor quest perfection time focus wonderful precision CNC spinners years has several kinds available two-inch types profiled Classic Old Veco Needle Nose available aluminum magnesium magnesium special purpose very light expensive Randys revised item combines thinned aluminum shell magnesium backplate/nose cone re-engineering provides equivalent weight allmagnesium better strength handling try quality products contact Randy Aero Products 1880 Scenic Hwy Snellville GA 30278 Tel 770 979-2035 Till next time Send pictures theres topic youd like see discussed let know parts engine would part please contact AJ 130 Seminole Ave Norwood PA 19074-1127 Warbird Tech Series have added recent great books aviation libraryvolumes 12 13 cover North American B-25 Mitchell Douglas A-i Skyraider book contains 100 pages crammed full history black-and-white photos four pages color photos some great drawings photos cockpit detail B-25 Mitchell volume features South Pacific Strafers European bombers 75mm nose cannons gun turrets waist mounts Tokyo Raiders some nose art A- 1 Skyraider book has Vietnam kills dive torpedo versions tech manual drawings battle damage photos gun ordnance loadings cockpits crew stations Warbird Tech series books some best have seen use scale builder great documenting Sport Scale entry good start Precision model books published Specialty Press 11481 Kost Dam Rd North Branch MN 55056 US 612 583-3239 series distributed UK Europe Airlife Publishing Ltd cost $1695 per volume plus shipping handling obtained copies Zenith Books 729 Prospect Ave Osceola WI 54020 800 826-6600 Please send ideas notice upcoming CL Scale events contest reports especially photos CL Scale activity address very top column Model Aviation
Edition: Model Aviation - 1998/10
Page Numbers: 135, 138
Edition: Model Aviation - 1998/10
Page Numbers: 135, 138
CONTROL LINE AEROBATICS 1 d II F 1 I U l II J U 1 difficult rewarding challenges Stunt work another fliers airplane get fly its potential Much has written about trimming surprising much ignored misunderstood wish magic wand could wave would make airplane fly Nationals level isnt areas adjust fliers start plan orderly approach having plan best way best method systematically trimming airplane Paul Walkers article Impact published Flying Models Reprints available through PAMPA Precision Aerobatic Model Pilots Association services Box 2026 Loomis CA 95650-2026 last few years Ive flying other peoples airplanes common theme handle neutral setting rather lack good neutral setting may seem small issue after everyone different politically correct era Some time ago Bill Werwage flying Classic models remarked airplanes flies seem two basic settings angled setting much pistol grip vertical grip might ask whats big deal fliers have chosen hold hands naturally chosestill politically correct problem can arise misaligned handle setting itself can cause misinterpretation trim airplane biasing neutral set up mechanical advantage causes control sensitive/quicker direction Usually up control because handle often canted forward top pushed forward Consider constructing model spent considerable time effort get Junior Flite Streak kit prototype 15 size Brodak George controls neutral Aldrich design come 35 trainer versions surfaces set neutral controls controls latest tricks alignments insure surfaces faithfully followed inputs However after work make controls linear handle setting can destroy linearity Ive finally gotten real dealthe system linearity dont follow through aspect can expect problems Back handle models get try usually have handle set forward have flown several handle rotated airplanes extremely difficult fly level let alone put through pattern safely observation admittedly result being used vertical setting However no question up very sensitive down almost required pulling handle get safe outside corner may sound Im exaggerating Im situation really does prevent flying airplane well prefer vertical setting handle Ive mentioned several times during last few years what shooting handle setting equal pressure control force/feel apply up down assumptionand realize always sois vertical setting brings equal turn practice good patterns need strive honest equal turw cannot fly uniform maneuvers October 1998 135 Brian Eathers latest example Firecracker design powered Precision Aero 51 has own propeller tuned pipe Father son team Darrel Ryan Gronto Dallas TX Texarkana contest Ryan fourth Jr Beginner Darrel second Expert airplane set up turn same way Setting handle vertical position sounds very simple may have noticed adjusting new set lines minute variations neutral tend compensated subconsciously Indeed model specifically set handle what looked awkward up position airplane flight handle properly set particular airplane/handle always took several flights work back because handle position might have work particular setting get best feel strive position very close vertical will give optimum position base trim much same leveling wings start eliminating variations now can affect trimming program can guarantee go through trim process will have honest trim possible Thus far discussion has focused strictly physical position handle comply suggestions Ive made can simply adjust length either line basic handle has feature After youve flown setting few flights will naturally become accustomed way feels start become aware certain characteristics model airplane might tend fly inverted lower four-feet limit fly bit higher After upright can issue slight compensations youthe fliermake adjustment youre after very small experience/feel things once you will understand adjustment take care situation slight pull down line shorten say /32 inch Fly try see what effect ballpark model should settle slightly higher inverted flight Remember very fine adjustment Im fine adjustments other capabilities exist some handles Thumb wheels give ability make extremely fine adjustments flight can valuable now can look next levelthe pressure required handle turn airplane can last step extracting best trim Before look acquiring handle capability should feel comfortable basic handle having flown basic handle will probably want step up next level source Brodak s Distributing Company 100 Park Ave Carmichaels PA 15320 Tel 412 966-2726 handles come standard expert XPA expert series quality excellent using thumb wheels understand very fine adjustment discussion Im going exclude post lengths overhang also adjustable thumb wheels Im after equalizing pressure controls effect movement will take less turn experience change rotate appropriate wheel see affects feel controls its first time try wheel direction no magic can same thing thumb wheels can cable length adjustment However interchangeable because too much thumb wheel can angle bar front handle causing unequal post length changes linearity control input Its best use fine adjustment keep bar same angle basic handlevertical discussion should give some insight making airplane work up its potential Dont reluctant work adjustments can try fun exploring CL ScaleIBoss Continued page 133 overall structure 5- 30-minute epoxy areas requiring stiffening additional strength Epoxy used couple ways first firewall construction mounting engine landing gear servos bellcranks other place would use plywood hardwood can make equivalent plywood hardwood laminating heavy corrugated material mix batch 30-minute epoxy pour open flute ends take 1/s-inchthick diameter wire piece coat hanger will push epoxy flutes twirling action will put coating inside paper material adding considerable strength ultimate strengthening fill flutes solid epoxy needed fully hardened can drilled mounting bolts youre mind fill corrugated material epoxy can epoxy plywood hardwood mounting servos bellcranks etc second important use epoxy glues coat entire area paper other type construction model would come contact fuel have covered considerable amount month Next month Ill talk about covering models structure detailing Ill leave Elmers paper white glue until Wanted anyone out would like part old McCoy 60 AJ Hetzel Jr wants fly New Items As has done times before Randy Smith Aero Products has introduced item help competitor quest perfection time focus wonderful precision CNC spinners years has several kinds available two-inch types profiled Classic Old Veco Needle Nose available aluminum magnesium magnesium special purpose very light expensive Randys revised item combines thinned aluminum shell magnesium backplate/nose cone re-engineering provides equivalent weight allmagnesium better strength handling try quality products contact Randy Aero Products 1880 Scenic Hwy Snellville GA 30278 Tel 770 979-2035 Till next time Send pictures theres topic youd like see discussed let know parts engine would part please contact AJ 130 Seminole Ave Norwood PA 19074-1127 Warbird Tech Series have added recent great books aviation libraryvolumes 12 13 cover North American B-25 Mitchell Douglas A-i Skyraider book contains 100 pages crammed full history black-and-white photos four pages color photos some great drawings photos cockpit detail B-25 Mitchell volume features South Pacific Strafers European bombers 75mm nose cannons gun turrets waist mounts Tokyo Raiders some nose art A- 1 Skyraider book has Vietnam kills dive torpedo versions tech manual drawings battle damage photos gun ordnance loadings cockpits crew stations Warbird Tech series books some best have seen use scale builder great documenting Sport Scale entry good start Precision model books published Specialty Press 11481 Kost Dam Rd North Branch MN 55056 US 612 583-3239 series distributed UK Europe Airlife Publishing Ltd cost $1695 per volume plus shipping handling obtained copies Zenith Books 729 Prospect Ave Osceola WI 54020 800 826-6600 Please send ideas notice upcoming CL Scale events contest reports especially photos CL Scale activity address very top column Model Aviation
