can launch whole sailplane contest winch crew walking back para chute first launch Strong words painstakingly tested methods described can ex pect 25-yard rollouts 70-foot line less fields too small 049 power-podsno e re quired winch Histart U Timothy J Myers BOB TUPPER nice guy Hes also good sailplane pilot never seen father power-towing act day agreed meet us field try something new explained fly tow Dad set out equipment Dad towed him up Bob didnt have trouble process made couple tows hooked second towline Bobs fifth power-tow double other line sail plane No trouble made dozen doubles evening Now competent pilot can fly double-tows right beginning using transmitter hes never handled before plane hes never flown before cant few things learn course can teach Read equipment need can found lying around RC airport Youll need aerobatic airplane 35 engine larger pilot should very familiar plane Youll need sailplane sailplane pilot should have flown off winch high-start enough get trimmed balanced proper ly sailplane should fairly stable dnt like see start Hobie Hawk unless done some slope soar ing Youll need towline youll have way dont claim first tow RC sail plane RC power plane claim way easy way completion photo session double-tow shown made over 100 tows damaging aircraft used First forget about realistic trailing tows hard enough sailplane pilot sitting right end line know weve tried Schweizer 2-32 RC pilots have remain ground cant see well keeping planes lined up lot harder Therefore need arrangement automatically stable High Tow use very close situation sail plane sees winch Hi-start towed way misalignments between towplane sailplane accommodated changes angle towline changes line tension trailing tow posi tion other hand virtually guarantees will get some slack line Slack always followed twanging always 56 Model Aviation decent towplane pilot followed loss control next misconception have get rid towline should connect sail planes nose towplanes tail like big ones sailplane goes crazy whips side-to-side yanks towplane right out sky correct place attach towline sailplane belly right under center gravity correct place attach towline towplane top right over center gravity allows towline move lot before disturbs either aircraft Finally get rid idea big slow trainer will make good towplane cant make worse choice What need plane lots excess power tremendous control authority use stock Quickie 500 stock K&B 40 10X6 propeller As can see tows two stock Aquilas time climb angle Aquila about 30 degrees may think foregoing statements bit pushy learned hard way tried nose-to-tail hookups tried big slow trainers towplanes also crashed lot stopped crashing went Quickie 500/Aquila combination hightow configuration As pictures show arrangement works kinds weather wind down runway crosswinds no winds Simple best aviation towline 70 feet 40-pound testmonofilanient a2 12 streamer sailplane end line tied Bowline ask Boy Scout simply looped over nose Quickie bears landing gear rests top fuselage soda-pop-can pull tab provides towring sailplane Just before takeoff check sure towline hasnt snagged rudder got under horizontal stabilizer its clear dont worry about will never get closer tail towplane sitting runway Check trims sailplane get good grip hold shoulder height Check towplanes trims controls run up englne sailplane pilot holds convoy back until its time go runs forward few steps puts sailplane air just like test glide will shoot up high start Let climb about 10 feet push over horizontal flight Let towplane reach flying speed both planes rotate climb angle together climb will quite steep very manageable sailplane pilot gets careless lets sailplane nose get too high will stop towplane cold will end up towplane hanging sailplane pointing straight down Dont panic happens sailplane can carry extra weight very easily Get things sorted out cut towplane loose find its own way home too low happens dont cut loose Shut down towplanes englne use sailplane set gently ground Its easy Turning difficulties advantage use way provide safe release method high altitudes As convoy gets higher higher becomes nearly impossible see whats going have established stable climb low altitudes resist temp Fig 4 Ready launch Pennant stretch shows George has K&B 40 full throttle checking out control motions Its always good idea check trim levers both transmitters time before launching Aberle photo January1980 57 Fig 2 Setting up ine has attached both aircraft stretched out along runway Tim pre-setting control trim levers Dad stirs K&B 40 life Bob Aberle photo Fig 3 old George unu mini U5U enu aiuuuuu pflOtO mission successful package Towplane stock Quickee 500 powered stock K&B 40 swinging 10/6 Control Cox/Sanwa Sailplane stock Cox Airtronics Aquila except releasable towhook added Control Cannon 4channel Tini RC system Towline 75 feet Sears 40-Bound-test monofilament Aberle ohoto tation make better way up can get pretty high tow get throttle back towplane engine let sailplanes controls go neutral will have holding some forward stick during tow towplane will end up hanging flm sailplane ideal position insure line release minimum potential fouling either aircraft Cut loose add little power dive down runway get set next tow Landing towline streaming behind caus es plane sink bit faster usual Let Land steep approach drag in usual way run chance catching towline something yanking plane out air Landing towline attached advantage because stays stretched out neatly release air will have go find untangle hook up again say extra work just isnt necessary modification two stock aircraft addition reasonable towhook sailplane made simple changes stock Aquila hook shown Fig 1 scheme fail-safe servo required exert force prevent latch opening worst thing could would design mechanism such servo overcome towing force order release line also use open hook ring held cap tive complicate things dont have couple hints towlines may order Longer better shorten line about 30 feet get very busy flying sailplane Moving towbook forward about two inches makes life easier beginner helps get convoy off ground Fig 8 Ready liftoff Note bend sail planes wing George holds towplane run way forward stick can seen alignment wing stabilizer George calls liftoff both transition fairly steep climb sailplane carrying part weight towplane Aberle photo 58 Model Aviation --a 1-1g b tIII ready takeoff George checks photographer Tims arm gets tired holding back convoy firm grip slippery sailplane Aberle pic Fig 7 Sailplane has just released climbing altitude Towplane pilot must keep plane firmly ground during phase order allow sailplane pilot time get stabil ized tow speed has built up well beyond flying speed towplane should lift off gentle climb Applegate photo Fig 6 Release Tim trots few steps down runway insure towplane moving under control places air George kept busy towplanes rudder during takeoff run keeping convoy lined up runway spite crosswind condition Aberle photo Fig 11 Dont panic convoy gets little out line George has let wind push towplane quite way off runway centerline Tim has gone straight ahead agreed Towplane has already entered climb may see little spoiler put out maintain line tension transitional phase George will turn towplane left wind pretty soon will get sorted out Applegate photo Fig 12 doesnt look way plane bottom doing towingl Practice reasonable altitudes youll know convoy gets high really cant tell planes relative other sailplane pulls towplane stall its usually best cut loose let pilot solve own problems Trying re-establish stable convoy after planes has gone out control masochistic Applegate photo January1980 59 r. auumnmat should round up inu trimmed por tant establish stable configuration early because higher get harder see make appropriate corrections try hand-fly convoy way up going work harder team has everything trimmed right Photo shows Tim put out little spoilers probably compensate fact towplane slowed down little entered climb Gets automatic after Applegate photo Fig 9 convoy its way t3eorge lot ot correction towplane trying hold runway heading Tim already started turn left climb wind sort uncoordinated behavior occurs glider may actually stop towplane Rudder shows Tim already initiated turn get back behind towplane picture taken Aberle photo rue rle caught Tim importaniiask re-trimming sailplane glide Trim everything sailplaning Aberle photo Fig 14 sun bounces highlights off leading edges Tims sailplane brings home spot landing Note spoilers well Out exercise stiff crosswind Aberla photo wind gusty 15-pound-test towline use less breaks too often 40-pound monofilament breaks now usually Bowline knot towplane end use Hangmans Knot sailplane end never has broken Power management tow pilots main con cern sets climb angle angle too steep will find torque sets up left-hand turn cant stopped aileron rudder has got solution let nose down bit can build up some flying speed total ground run measures out 25 yards really dont need lot space powertowing RC sailplanes fact system can set up fields too small usual 049 power-pods never need e would required winch high-start decent towplane pilot can launch whole sailplane contest winch crew walking back parachute first launch doubt Try see yourseW Special thanks order friends came out lend encouragement snap pictures Atnong Bob Aberle provided big slow trainer convinced us find better way Howie Applegate Bob Hare Cathy Blazeyewski gave up time lent talents task photodocumentation dad George M Myers kept pushing project along got discouraged and/or lazy started project nine months ago theres bit left learn about still Let us know what find out Editors Note August 26 Jamesburg NJ Tim won first placeby second last flight last contestat towplane/sailplane meet sponsored Flying Models George dad piloted Quickie 500 OS 60 FSR driving 13/5 prop Aquila flew 100-foot line Both craft towline releases George took third towplane piloted Timall family Tims first-place prize appropriate ride real sailplane courtesy Poocks Island Soar ing Inc Blairstown NJ Fig 17 Towplane lifts off about 26 yards start ground run moment liftoff sailplane pushed over level flight insure towplane will upset critical point flight Since camera taking photographs approximately seconds apart obvious added lift sailplanes wings gives JATO-like boost towplanes takeoff Note high convoy has gone second A-second after liftoff Bob photo 60 Model Aviation Fig 15 Spoilers such Aquila very handy speed control early stage takeoff sailplane has tendency over-run towplane times also make required spot landing lot easier manage George Myers pic 4 Fig 16 Sequential photographs Bob Hares motorized Minolta XD-i 1 shows Tim runs forward about 5 yards before releasing convoy flight allows towplane come under positive control situation Sailplane climbs 10 15 feet altitude towplane runs along ground levels off let towplane gain speed Tim puts up 10-yard markers assist team evaluating what happening Bob Hare photo
Edition: Model Aviation - 1980/01
Page Numbers: 56, 57, 58, 59, 60
can launch whole sailplane contest winch crew walking back para chute first launch Strong words painstakingly tested methods described can ex pect 25-yard rollouts 70-foot line less fields too small 049 power-podsno e re quired winch Histart U Timothy J Myers BOB TUPPER nice guy Hes also good sailplane pilot never seen father power-towing act day agreed meet us field try something new explained fly tow Dad set out equipment Dad towed him up Bob didnt have trouble process made couple tows hooked second towline Bobs fifth power-tow double other line sail plane No trouble made dozen doubles evening Now competent pilot can fly double-tows right beginning using transmitter hes never handled before plane hes never flown before cant few things learn course can teach Read equipment need can found lying around RC airport Youll need aerobatic airplane 35 engine larger pilot should very familiar plane Youll need sailplane sailplane pilot should have flown off winch high-start enough get trimmed balanced proper ly sailplane should fairly stable dnt like see start Hobie Hawk unless done some slope soar ing Youll need towline youll have way dont claim first tow RC sail plane RC power plane claim way easy way completion photo session double-tow shown made over 100 tows damaging aircraft used First forget about realistic trailing tows hard enough sailplane pilot sitting right end line know weve tried Schweizer 2-32 RC pilots have remain ground cant see well keeping planes lined up lot harder Therefore need arrangement automatically stable High Tow use very close situation sail plane sees winch Hi-start towed way misalignments between towplane sailplane accommodated changes angle towline changes line tension trailing tow posi tion other hand virtually guarantees will get some slack line Slack always followed twanging always 56 Model Aviation decent towplane pilot followed loss control next misconception have get rid towline should connect sail planes nose towplanes tail like big ones sailplane goes crazy whips side-to-side yanks towplane right out sky correct place attach towline sailplane belly right under center gravity correct place attach towline towplane top right over center gravity allows towline move lot before disturbs either aircraft Finally get rid idea big slow trainer will make good towplane cant make worse choice What need plane lots excess power tremendous control authority use stock Quickie 500 stock K&B 40 10X6 propeller As can see tows two stock Aquilas time climb angle Aquila about 30 degrees may think foregoing statements bit pushy learned hard way tried nose-to-tail hookups tried big slow trainers towplanes also crashed lot stopped crashing went Quickie 500/Aquila combination hightow configuration As pictures show arrangement works kinds weather wind down runway crosswinds no winds Simple best aviation towline 70 feet 40-pound testmonofilanient a2 12 streamer sailplane end line tied Bowline ask Boy Scout simply looped over nose Quickie bears landing gear rests top fuselage soda-pop-can pull tab provides towring sailplane Just before takeoff check sure towline hasnt snagged rudder got under horizontal stabilizer its clear dont worry about will never get closer tail towplane sitting runway Check trims sailplane get good grip hold shoulder height Check towplanes trims controls run up englne sailplane pilot holds convoy back until its time go runs forward few steps puts sailplane air just like test glide will shoot up high start Let climb about 10 feet push over horizontal flight Let towplane reach flying speed both planes rotate climb angle together climb will quite steep very manageable sailplane pilot gets careless lets sailplane nose get too high will stop towplane cold will end up towplane hanging sailplane pointing straight down Dont panic happens sailplane can carry extra weight very easily Get things sorted out cut towplane loose find its own way home too low happens dont cut loose Shut down towplanes englne use sailplane set gently ground Its easy Turning difficulties advantage use way provide safe release method high altitudes As convoy gets higher higher becomes nearly impossible see whats going have established stable climb low altitudes resist temp Fig 4 Ready launch Pennant stretch shows George has K&B 40 full throttle checking out control motions Its always good idea check trim levers both transmitters time before launching Aberle photo January1980 57 Fig 2 Setting up ine has attached both aircraft stretched out along runway Tim pre-setting control trim levers Dad stirs K&B 40 life Bob Aberle photo Fig 3 old George unu mini U5U enu aiuuuuu pflOtO mission successful package Towplane stock Quickee 500 powered stock K&B 40 swinging 10/6 Control Cox/Sanwa Sailplane stock Cox Airtronics Aquila except releasable towhook added Control Cannon 4channel Tini RC system Towline 75 feet Sears 40-Bound-test monofilament Aberle ohoto tation make better way up can get pretty high tow get throttle back towplane engine let sailplanes controls go neutral will have holding some forward stick during tow towplane will end up hanging flm sailplane ideal position insure line release minimum potential fouling either aircraft Cut loose add little power dive down runway get set next tow Landing towline streaming behind caus es plane sink bit faster usual Let Land steep approach drag in usual way run chance catching towline something yanking plane out air Landing towline attached advantage because stays stretched out neatly release air will have go find untangle hook up again say extra work just isnt necessary modification two stock aircraft addition reasonable towhook sailplane made simple changes stock Aquila hook shown Fig 1 scheme fail-safe servo required exert force prevent latch opening worst thing could would design mechanism such servo overcome towing force order release line also use open hook ring held cap tive complicate things dont have couple hints towlines may order Longer better shorten line about 30 feet get very busy flying sailplane Moving towbook forward about two inches makes life easier beginner helps get convoy off ground Fig 8 Ready liftoff Note bend sail planes wing George holds towplane run way forward stick can seen alignment wing stabilizer George calls liftoff both transition fairly steep climb sailplane carrying part weight towplane Aberle photo 58 Model Aviation --a 1-1g b tIII ready takeoff George checks photographer Tims arm gets tired holding back convoy firm grip slippery sailplane Aberle pic Fig 7 Sailplane has just released climbing altitude Towplane pilot must keep plane firmly ground during phase order allow sailplane pilot time get stabil ized tow speed has built up well beyond flying speed towplane should lift off gentle climb Applegate photo Fig 6 Release Tim trots few steps down runway insure towplane moving under control places air George kept busy towplanes rudder during takeoff run keeping convoy lined up runway spite crosswind condition Aberle photo Fig 11 Dont panic convoy gets little out line George has let wind push towplane quite way off runway centerline Tim has gone straight ahead agreed Towplane has already entered climb may see little spoiler put out maintain line tension transitional phase George will turn towplane left wind pretty soon will get sorted out Applegate photo Fig 12 doesnt look way plane bottom doing towingl Practice reasonable altitudes youll know convoy gets high really cant tell planes relative other sailplane pulls towplane stall its usually best cut loose let pilot solve own problems Trying re-establish stable convoy after planes has gone out control masochistic Applegate photo January1980 59 r. auumnmat should round up inu trimmed por tant establish stable configuration early because higher get harder see make appropriate corrections try hand-fly convoy way up going work harder team has everything trimmed right Photo shows Tim put out little spoilers probably compensate fact towplane slowed down little entered climb Gets automatic after Applegate photo Fig 9 convoy its way t3eorge lot ot correction towplane trying hold runway heading Tim already started turn left climb wind sort uncoordinated behavior occurs glider may actually stop towplane Rudder shows Tim already initiated turn get back behind towplane picture taken Aberle photo rue rle caught Tim importaniiask re-trimming sailplane glide Trim everything sailplaning Aberle photo Fig 14 sun bounces highlights off leading edges Tims sailplane brings home spot landing Note spoilers well Out exercise stiff crosswind Aberla photo wind gusty 15-pound-test towline use less breaks too often 40-pound monofilament breaks now usually Bowline knot towplane end use Hangmans Knot sailplane end never has broken Power management tow pilots main con cern sets climb angle angle too steep will find torque sets up left-hand turn cant stopped aileron rudder has got solution let nose down bit can build up some flying speed total ground run measures out 25 yards really dont need lot space powertowing RC sailplanes fact system can set up fields too small usual 049 power-pods never need e would required winch high-start decent towplane pilot can launch whole sailplane contest winch crew walking back parachute first launch doubt Try see yourseW Special thanks order friends came out lend encouragement snap pictures Atnong Bob Aberle provided big slow trainer convinced us find better way Howie Applegate Bob Hare Cathy Blazeyewski gave up time lent talents task photodocumentation dad George M Myers kept pushing project along got discouraged and/or lazy started project nine months ago theres bit left learn about still Let us know what find out Editors Note August 26 Jamesburg NJ Tim won first placeby second last flight last contestat towplane/sailplane meet sponsored Flying Models George dad piloted Quickie 500 OS 60 FSR driving 13/5 prop Aquila flew 100-foot line Both craft towline releases George took third towplane piloted Timall family Tims first-place prize appropriate ride real sailplane courtesy Poocks Island Soar ing Inc Blairstown NJ Fig 17 Towplane lifts off about 26 yards start ground run moment liftoff sailplane pushed over level flight insure towplane will upset critical point flight Since camera taking photographs approximately seconds apart obvious added lift sailplanes wings gives JATO-like boost towplanes takeoff Note high convoy has gone second A-second after liftoff Bob photo 60 Model Aviation Fig 15 Spoilers such Aquila very handy speed control early stage takeoff sailplane has tendency over-run towplane times also make required spot landing lot easier manage George Myers pic 4 Fig 16 Sequential photographs Bob Hares motorized Minolta XD-i 1 shows Tim runs forward about 5 yards before releasing convoy flight allows towplane come under positive control situation Sailplane climbs 10 15 feet altitude towplane runs along ground levels off let towplane gain speed Tim puts up 10-yard markers assist team evaluating what happening Bob Hare photo
Edition: Model Aviation - 1980/01
Page Numbers: 56, 57, 58, 59, 60
can launch whole sailplane contest winch crew walking back para chute first launch Strong words painstakingly tested methods described can ex pect 25-yard rollouts 70-foot line less fields too small 049 power-podsno e re quired winch Histart U Timothy J Myers BOB TUPPER nice guy Hes also good sailplane pilot never seen father power-towing act day agreed meet us field try something new explained fly tow Dad set out equipment Dad towed him up Bob didnt have trouble process made couple tows hooked second towline Bobs fifth power-tow double other line sail plane No trouble made dozen doubles evening Now competent pilot can fly double-tows right beginning using transmitter hes never handled before plane hes never flown before cant few things learn course can teach Read equipment need can found lying around RC airport Youll need aerobatic airplane 35 engine larger pilot should very familiar plane Youll need sailplane sailplane pilot should have flown off winch high-start enough get trimmed balanced proper ly sailplane should fairly stable dnt like see start Hobie Hawk unless done some slope soar ing Youll need towline youll have way dont claim first tow RC sail plane RC power plane claim way easy way completion photo session double-tow shown made over 100 tows damaging aircraft used First forget about realistic trailing tows hard enough sailplane pilot sitting right end line know weve tried Schweizer 2-32 RC pilots have remain ground cant see well keeping planes lined up lot harder Therefore need arrangement automatically stable High Tow use very close situation sail plane sees winch Hi-start towed way misalignments between towplane sailplane accommodated changes angle towline changes line tension trailing tow posi tion other hand virtually guarantees will get some slack line Slack always followed twanging always 56 Model Aviation decent towplane pilot followed loss control next misconception have get rid towline should connect sail planes nose towplanes tail like big ones sailplane goes crazy whips side-to-side yanks towplane right out sky correct place attach towline sailplane belly right under center gravity correct place attach towline towplane top right over center gravity allows towline move lot before disturbs either aircraft Finally get rid idea big slow trainer will make good towplane cant make worse choice What need plane lots excess power tremendous control authority use stock Quickie 500 stock K&B 40 10X6 propeller As can see tows two stock Aquilas time climb angle Aquila about 30 degrees may think foregoing statements bit pushy learned hard way tried nose-to-tail hookups tried big slow trainers towplanes also crashed lot stopped crashing went Quickie 500/Aquila combination hightow configuration As pictures show arrangement works kinds weather wind down runway crosswinds no winds Simple best aviation towline 70 feet 40-pound testmonofilanient a2 12 streamer sailplane end line tied Bowline ask Boy Scout simply looped over nose Quickie bears landing gear rests top fuselage soda-pop-can pull tab provides towring sailplane Just before takeoff check sure towline hasnt snagged rudder got under horizontal stabilizer its clear dont worry about will never get closer tail towplane sitting runway Check trims sailplane get good grip hold shoulder height Check towplanes trims controls run up englne sailplane pilot holds convoy back until its time go runs forward few steps puts sailplane air just like test glide will shoot up high start Let climb about 10 feet push over horizontal flight Let towplane reach flying speed both planes rotate climb angle together climb will quite steep very manageable sailplane pilot gets careless lets sailplane nose get too high will stop towplane cold will end up towplane hanging sailplane pointing straight down Dont panic happens sailplane can carry extra weight very easily Get things sorted out cut towplane loose find its own way home too low happens dont cut loose Shut down towplanes englne use sailplane set gently ground Its easy Turning difficulties advantage use way provide safe release method high altitudes As convoy gets higher higher becomes nearly impossible see whats going have established stable climb low altitudes resist temp Fig 4 Ready launch Pennant stretch shows George has K&B 40 full throttle checking out control motions Its always good idea check trim levers both transmitters time before launching Aberle photo January1980 57 Fig 2 Setting up ine has attached both aircraft stretched out along runway Tim pre-setting control trim levers Dad stirs K&B 40 life Bob Aberle photo Fig 3 old George unu mini U5U enu aiuuuuu pflOtO mission successful package Towplane stock Quickee 500 powered stock K&B 40 swinging 10/6 Control Cox/Sanwa Sailplane stock Cox Airtronics Aquila except releasable towhook added Control Cannon 4channel Tini RC system Towline 75 feet Sears 40-Bound-test monofilament Aberle ohoto tation make better way up can get pretty high tow get throttle back towplane engine let sailplanes controls go neutral will have holding some forward stick during tow towplane will end up hanging flm sailplane ideal position insure line release minimum potential fouling either aircraft Cut loose add little power dive down runway get set next tow Landing towline streaming behind caus es plane sink bit faster usual Let Land steep approach drag in usual way run chance catching towline something yanking plane out air Landing towline attached advantage because stays stretched out neatly release air will have go find untangle hook up again say extra work just isnt necessary modification two stock aircraft addition reasonable towhook sailplane made simple changes stock Aquila hook shown Fig 1 scheme fail-safe servo required exert force prevent latch opening worst thing could would design mechanism such servo overcome towing force order release line also use open hook ring held cap tive complicate things dont have couple hints towlines may order Longer better shorten line about 30 feet get very busy flying sailplane Moving towbook forward about two inches makes life easier beginner helps get convoy off ground Fig 8 Ready liftoff Note bend sail planes wing George holds towplane run way forward stick can seen alignment wing stabilizer George calls liftoff both transition fairly steep climb sailplane carrying part weight towplane Aberle photo 58 Model Aviation --a 1-1g b tIII ready takeoff George checks photographer Tims arm gets tired holding back convoy firm grip slippery sailplane Aberle pic Fig 7 Sailplane has just released climbing altitude Towplane pilot must keep plane firmly ground during phase order allow sailplane pilot time get stabil ized tow speed has built up well beyond flying speed towplane should lift off gentle climb Applegate photo Fig 6 Release Tim trots few steps down runway insure towplane moving under control places air George kept busy towplanes rudder during takeoff run keeping convoy lined up runway spite crosswind condition Aberle photo Fig 11 Dont panic convoy gets little out line George has let wind push towplane quite way off runway centerline Tim has gone straight ahead agreed Towplane has already entered climb may see little spoiler put out maintain line tension transitional phase George will turn towplane left wind pretty soon will get sorted out Applegate photo Fig 12 doesnt look way plane bottom doing towingl Practice reasonable altitudes youll know convoy gets high really cant tell planes relative other sailplane pulls towplane stall its usually best cut loose let pilot solve own problems Trying re-establish stable convoy after planes has gone out control masochistic Applegate photo January1980 59 r. auumnmat should round up inu trimmed por tant establish stable configuration early because higher get harder see make appropriate corrections try hand-fly convoy way up going work harder team has everything trimmed right Photo shows Tim put out little spoilers probably compensate fact towplane slowed down little entered climb Gets automatic after Applegate photo Fig 9 convoy its way t3eorge lot ot correction towplane trying hold runway heading Tim already started turn left climb wind sort uncoordinated behavior occurs glider may actually stop towplane Rudder shows Tim already initiated turn get back behind towplane picture taken Aberle photo rue rle caught Tim importaniiask re-trimming sailplane glide Trim everything sailplaning Aberle photo Fig 14 sun bounces highlights off leading edges Tims sailplane brings home spot landing Note spoilers well Out exercise stiff crosswind Aberla photo wind gusty 15-pound-test towline use less breaks too often 40-pound monofilament breaks now usually Bowline knot towplane end use Hangmans Knot sailplane end never has broken Power management tow pilots main con cern sets climb angle angle too steep will find torque sets up left-hand turn cant stopped aileron rudder has got solution let nose down bit can build up some flying speed total ground run measures out 25 yards really dont need lot space powertowing RC sailplanes fact system can set up fields too small usual 049 power-pods never need e would required winch high-start decent towplane pilot can launch whole sailplane contest winch crew walking back parachute first launch doubt Try see yourseW Special thanks order friends came out lend encouragement snap pictures Atnong Bob Aberle provided big slow trainer convinced us find better way Howie Applegate Bob Hare Cathy Blazeyewski gave up time lent talents task photodocumentation dad George M Myers kept pushing project along got discouraged and/or lazy started project nine months ago theres bit left learn about still Let us know what find out Editors Note August 26 Jamesburg NJ Tim won first placeby second last flight last contestat towplane/sailplane meet sponsored Flying Models George dad piloted Quickie 500 OS 60 FSR driving 13/5 prop Aquila flew 100-foot line Both craft towline releases George took third towplane piloted Timall family Tims first-place prize appropriate ride real sailplane courtesy Poocks Island Soar ing Inc Blairstown NJ Fig 17 Towplane lifts off about 26 yards start ground run moment liftoff sailplane pushed over level flight insure towplane will upset critical point flight Since camera taking photographs approximately seconds apart obvious added lift sailplanes wings gives JATO-like boost towplanes takeoff Note high convoy has gone second A-second after liftoff Bob photo 60 Model Aviation Fig 15 Spoilers such Aquila very handy speed control early stage takeoff sailplane has tendency over-run towplane times also make required spot landing lot easier manage George Myers pic 4 Fig 16 Sequential photographs Bob Hares motorized Minolta XD-i 1 shows Tim runs forward about 5 yards before releasing convoy flight allows towplane come under positive control situation Sailplane climbs 10 15 feet altitude towplane runs along ground levels off let towplane gain speed Tim puts up 10-yard markers assist team evaluating what happening Bob Hare photo
Edition: Model Aviation - 1980/01
Page Numbers: 56, 57, 58, 59, 60
can launch whole sailplane contest winch crew walking back para chute first launch Strong words painstakingly tested methods described can ex pect 25-yard rollouts 70-foot line less fields too small 049 power-podsno e re quired winch Histart U Timothy J Myers BOB TUPPER nice guy Hes also good sailplane pilot never seen father power-towing act day agreed meet us field try something new explained fly tow Dad set out equipment Dad towed him up Bob didnt have trouble process made couple tows hooked second towline Bobs fifth power-tow double other line sail plane No trouble made dozen doubles evening Now competent pilot can fly double-tows right beginning using transmitter hes never handled before plane hes never flown before cant few things learn course can teach Read equipment need can found lying around RC airport Youll need aerobatic airplane 35 engine larger pilot should very familiar plane Youll need sailplane sailplane pilot should have flown off winch high-start enough get trimmed balanced proper ly sailplane should fairly stable dnt like see start Hobie Hawk unless done some slope soar ing Youll need towline youll have way dont claim first tow RC sail plane RC power plane claim way easy way completion photo session double-tow shown made over 100 tows damaging aircraft used First forget about realistic trailing tows hard enough sailplane pilot sitting right end line know weve tried Schweizer 2-32 RC pilots have remain ground cant see well keeping planes lined up lot harder Therefore need arrangement automatically stable High Tow use very close situation sail plane sees winch Hi-start towed way misalignments between towplane sailplane accommodated changes angle towline changes line tension trailing tow posi tion other hand virtually guarantees will get some slack line Slack always followed twanging always 56 Model Aviation decent towplane pilot followed loss control next misconception have get rid towline should connect sail planes nose towplanes tail like big ones sailplane goes crazy whips side-to-side yanks towplane right out sky correct place attach towline sailplane belly right under center gravity correct place attach towline towplane top right over center gravity allows towline move lot before disturbs either aircraft Finally get rid idea big slow trainer will make good towplane cant make worse choice What need plane lots excess power tremendous control authority use stock Quickie 500 stock K&B 40 10X6 propeller As can see tows two stock Aquilas time climb angle Aquila about 30 degrees may think foregoing statements bit pushy learned hard way tried nose-to-tail hookups tried big slow trainers towplanes also crashed lot stopped crashing went Quickie 500/Aquila combination hightow configuration As pictures show arrangement works kinds weather wind down runway crosswinds no winds Simple best aviation towline 70 feet 40-pound testmonofilanient a2 12 streamer sailplane end line tied Bowline ask Boy Scout simply looped over nose Quickie bears landing gear rests top fuselage soda-pop-can pull tab provides towring sailplane Just before takeoff check sure towline hasnt snagged rudder got under horizontal stabilizer its clear dont worry about will never get closer tail towplane sitting runway Check trims sailplane get good grip hold shoulder height Check towplanes trims controls run up englne sailplane pilot holds convoy back until its time go runs forward few steps puts sailplane air just like test glide will shoot up high start Let climb about 10 feet push over horizontal flight Let towplane reach flying speed both planes rotate climb angle together climb will quite steep very manageable sailplane pilot gets careless lets sailplane nose get too high will stop towplane cold will end up towplane hanging sailplane pointing straight down Dont panic happens sailplane can carry extra weight very easily Get things sorted out cut towplane loose find its own way home too low happens dont cut loose Shut down towplanes englne use sailplane set gently ground Its easy Turning difficulties advantage use way provide safe release method high altitudes As convoy gets higher higher becomes nearly impossible see whats going have established stable climb low altitudes resist temp Fig 4 Ready launch Pennant stretch shows George has K&B 40 full throttle checking out control motions Its always good idea check trim levers both transmitters time before launching Aberle photo January1980 57 Fig 2 Setting up ine has attached both aircraft stretched out along runway Tim pre-setting control trim levers Dad stirs K&B 40 life Bob Aberle photo Fig 3 old George unu mini U5U enu aiuuuuu pflOtO mission successful package Towplane stock Quickee 500 powered stock K&B 40 swinging 10/6 Control Cox/Sanwa Sailplane stock Cox Airtronics Aquila except releasable towhook added Control Cannon 4channel Tini RC system Towline 75 feet Sears 40-Bound-test monofilament Aberle ohoto tation make better way up can get pretty high tow get throttle back towplane engine let sailplanes controls go neutral will have holding some forward stick during tow towplane will end up hanging flm sailplane ideal position insure line release minimum potential fouling either aircraft Cut loose add little power dive down runway get set next tow Landing towline streaming behind caus es plane sink bit faster usual Let Land steep approach drag in usual way run chance catching towline something yanking plane out air Landing towline attached advantage because stays stretched out neatly release air will have go find untangle hook up again say extra work just isnt necessary modification two stock aircraft addition reasonable towhook sailplane made simple changes stock Aquila hook shown Fig 1 scheme fail-safe servo required exert force prevent latch opening worst thing could would design mechanism such servo overcome towing force order release line also use open hook ring held cap tive complicate things dont have couple hints towlines may order Longer better shorten line about 30 feet get very busy flying sailplane Moving towbook forward about two inches makes life easier beginner helps get convoy off ground Fig 8 Ready liftoff Note bend sail planes wing George holds towplane run way forward stick can seen alignment wing stabilizer George calls liftoff both transition fairly steep climb sailplane carrying part weight towplane Aberle photo 58 Model Aviation --a 1-1g b tIII ready takeoff George checks photographer Tims arm gets tired holding back convoy firm grip slippery sailplane Aberle pic Fig 7 Sailplane has just released climbing altitude Towplane pilot must keep plane firmly ground during phase order allow sailplane pilot time get stabil ized tow speed has built up well beyond flying speed towplane should lift off gentle climb Applegate photo Fig 6 Release Tim trots few steps down runway insure towplane moving under control places air George kept busy towplanes rudder during takeoff run keeping convoy lined up runway spite crosswind condition Aberle photo Fig 11 Dont panic convoy gets little out line George has let wind push towplane quite way off runway centerline Tim has gone straight ahead agreed Towplane has already entered climb may see little spoiler put out maintain line tension transitional phase George will turn towplane left wind pretty soon will get sorted out Applegate photo Fig 12 doesnt look way plane bottom doing towingl Practice reasonable altitudes youll know convoy gets high really cant tell planes relative other sailplane pulls towplane stall its usually best cut loose let pilot solve own problems Trying re-establish stable convoy after planes has gone out control masochistic Applegate photo January1980 59 r. auumnmat should round up inu trimmed por tant establish stable configuration early because higher get harder see make appropriate corrections try hand-fly convoy way up going work harder team has everything trimmed right Photo shows Tim put out little spoilers probably compensate fact towplane slowed down little entered climb Gets automatic after Applegate photo Fig 9 convoy its way t3eorge lot ot correction towplane trying hold runway heading Tim already started turn left climb wind sort uncoordinated behavior occurs glider may actually stop towplane Rudder shows Tim already initiated turn get back behind towplane picture taken Aberle photo rue rle caught Tim importaniiask re-trimming sailplane glide Trim everything sailplaning Aberle photo Fig 14 sun bounces highlights off leading edges Tims sailplane brings home spot landing Note spoilers well Out exercise stiff crosswind Aberla photo wind gusty 15-pound-test towline use less breaks too often 40-pound monofilament breaks now usually Bowline knot towplane end use Hangmans Knot sailplane end never has broken Power management tow pilots main con cern sets climb angle angle too steep will find torque sets up left-hand turn cant stopped aileron rudder has got solution let nose down bit can build up some flying speed total ground run measures out 25 yards really dont need lot space powertowing RC sailplanes fact system can set up fields too small usual 049 power-pods never need e would required winch high-start decent towplane pilot can launch whole sailplane contest winch crew walking back parachute first launch doubt Try see yourseW Special thanks order friends came out lend encouragement snap pictures Atnong Bob Aberle provided big slow trainer convinced us find better way Howie Applegate Bob Hare Cathy Blazeyewski gave up time lent talents task photodocumentation dad George M Myers kept pushing project along got discouraged and/or lazy started project nine months ago theres bit left learn about still Let us know what find out Editors Note August 26 Jamesburg NJ Tim won first placeby second last flight last contestat towplane/sailplane meet sponsored Flying Models George dad piloted Quickie 500 OS 60 FSR driving 13/5 prop Aquila flew 100-foot line Both craft towline releases George took third towplane piloted Timall family Tims first-place prize appropriate ride real sailplane courtesy Poocks Island Soar ing Inc Blairstown NJ Fig 17 Towplane lifts off about 26 yards start ground run moment liftoff sailplane pushed over level flight insure towplane will upset critical point flight Since camera taking photographs approximately seconds apart obvious added lift sailplanes wings gives JATO-like boost towplanes takeoff Note high convoy has gone second A-second after liftoff Bob photo 60 Model Aviation Fig 15 Spoilers such Aquila very handy speed control early stage takeoff sailplane has tendency over-run towplane times also make required spot landing lot easier manage George Myers pic 4 Fig 16 Sequential photographs Bob Hares motorized Minolta XD-i 1 shows Tim runs forward about 5 yards before releasing convoy flight allows towplane come under positive control situation Sailplane climbs 10 15 feet altitude towplane runs along ground levels off let towplane gain speed Tim puts up 10-yard markers assist team evaluating what happening Bob Hare photo
Edition: Model Aviation - 1980/01
Page Numbers: 56, 57, 58, 59, 60
can launch whole sailplane contest winch crew walking back para chute first launch Strong words painstakingly tested methods described can ex pect 25-yard rollouts 70-foot line less fields too small 049 power-podsno e re quired winch Histart U Timothy J Myers BOB TUPPER nice guy Hes also good sailplane pilot never seen father power-towing act day agreed meet us field try something new explained fly tow Dad set out equipment Dad towed him up Bob didnt have trouble process made couple tows hooked second towline Bobs fifth power-tow double other line sail plane No trouble made dozen doubles evening Now competent pilot can fly double-tows right beginning using transmitter hes never handled before plane hes never flown before cant few things learn course can teach Read equipment need can found lying around RC airport Youll need aerobatic airplane 35 engine larger pilot should very familiar plane Youll need sailplane sailplane pilot should have flown off winch high-start enough get trimmed balanced proper ly sailplane should fairly stable dnt like see start Hobie Hawk unless done some slope soar ing Youll need towline youll have way dont claim first tow RC sail plane RC power plane claim way easy way completion photo session double-tow shown made over 100 tows damaging aircraft used First forget about realistic trailing tows hard enough sailplane pilot sitting right end line know weve tried Schweizer 2-32 RC pilots have remain ground cant see well keeping planes lined up lot harder Therefore need arrangement automatically stable High Tow use very close situation sail plane sees winch Hi-start towed way misalignments between towplane sailplane accommodated changes angle towline changes line tension trailing tow posi tion other hand virtually guarantees will get some slack line Slack always followed twanging always 56 Model Aviation decent towplane pilot followed loss control next misconception have get rid towline should connect sail planes nose towplanes tail like big ones sailplane goes crazy whips side-to-side yanks towplane right out sky correct place attach towline sailplane belly right under center gravity correct place attach towline towplane top right over center gravity allows towline move lot before disturbs either aircraft Finally get rid idea big slow trainer will make good towplane cant make worse choice What need plane lots excess power tremendous control authority use stock Quickie 500 stock K&B 40 10X6 propeller As can see tows two stock Aquilas time climb angle Aquila about 30 degrees may think foregoing statements bit pushy learned hard way tried nose-to-tail hookups tried big slow trainers towplanes also crashed lot stopped crashing went Quickie 500/Aquila combination hightow configuration As pictures show arrangement works kinds weather wind down runway crosswinds no winds Simple best aviation towline 70 feet 40-pound testmonofilanient a2 12 streamer sailplane end line tied Bowline ask Boy Scout simply looped over nose Quickie bears landing gear rests top fuselage soda-pop-can pull tab provides towring sailplane Just before takeoff check sure towline hasnt snagged rudder got under horizontal stabilizer its clear dont worry about will never get closer tail towplane sitting runway Check trims sailplane get good grip hold shoulder height Check towplanes trims controls run up englne sailplane pilot holds convoy back until its time go runs forward few steps puts sailplane air just like test glide will shoot up high start Let climb about 10 feet push over horizontal flight Let towplane reach flying speed both planes rotate climb angle together climb will quite steep very manageable sailplane pilot gets careless lets sailplane nose get too high will stop towplane cold will end up towplane hanging sailplane pointing straight down Dont panic happens sailplane can carry extra weight very easily Get things sorted out cut towplane loose find its own way home too low happens dont cut loose Shut down towplanes englne use sailplane set gently ground Its easy Turning difficulties advantage use way provide safe release method high altitudes As convoy gets higher higher becomes nearly impossible see whats going have established stable climb low altitudes resist temp Fig 4 Ready launch Pennant stretch shows George has K&B 40 full throttle checking out control motions Its always good idea check trim levers both transmitters time before launching Aberle photo January1980 57 Fig 2 Setting up ine has attached both aircraft stretched out along runway Tim pre-setting control trim levers Dad stirs K&B 40 life Bob Aberle photo Fig 3 old George unu mini U5U enu aiuuuuu pflOtO mission successful package Towplane stock Quickee 500 powered stock K&B 40 swinging 10/6 Control Cox/Sanwa Sailplane stock Cox Airtronics Aquila except releasable towhook added Control Cannon 4channel Tini RC system Towline 75 feet Sears 40-Bound-test monofilament Aberle ohoto tation make better way up can get pretty high tow get throttle back towplane engine let sailplanes controls go neutral will have holding some forward stick during tow towplane will end up hanging flm sailplane ideal position insure line release minimum potential fouling either aircraft Cut loose add little power dive down runway get set next tow Landing towline streaming behind caus es plane sink bit faster usual Let Land steep approach drag in usual way run chance catching towline something yanking plane out air Landing towline attached advantage because stays stretched out neatly release air will have go find untangle hook up again say extra work just isnt necessary modification two stock aircraft addition reasonable towhook sailplane made simple changes stock Aquila hook shown Fig 1 scheme fail-safe servo required exert force prevent latch opening worst thing could would design mechanism such servo overcome towing force order release line also use open hook ring held cap tive complicate things dont have couple hints towlines may order Longer better shorten line about 30 feet get very busy flying sailplane Moving towbook forward about two inches makes life easier beginner helps get convoy off ground Fig 8 Ready liftoff Note bend sail planes wing George holds towplane run way forward stick can seen alignment wing stabilizer George calls liftoff both transition fairly steep climb sailplane carrying part weight towplane Aberle photo 58 Model Aviation --a 1-1g b tIII ready takeoff George checks photographer Tims arm gets tired holding back convoy firm grip slippery sailplane Aberle pic Fig 7 Sailplane has just released climbing altitude Towplane pilot must keep plane firmly ground during phase order allow sailplane pilot time get stabil ized tow speed has built up well beyond flying speed towplane should lift off gentle climb Applegate photo Fig 6 Release Tim trots few steps down runway insure towplane moving under control places air George kept busy towplanes rudder during takeoff run keeping convoy lined up runway spite crosswind condition Aberle photo Fig 11 Dont panic convoy gets little out line George has let wind push towplane quite way off runway centerline Tim has gone straight ahead agreed Towplane has already entered climb may see little spoiler put out maintain line tension transitional phase George will turn towplane left wind pretty soon will get sorted out Applegate photo Fig 12 doesnt look way plane bottom doing towingl Practice reasonable altitudes youll know convoy gets high really cant tell planes relative other sailplane pulls towplane stall its usually best cut loose let pilot solve own problems Trying re-establish stable convoy after planes has gone out control masochistic Applegate photo January1980 59 r. auumnmat should round up inu trimmed por tant establish stable configuration early because higher get harder see make appropriate corrections try hand-fly convoy way up going work harder team has everything trimmed right Photo shows Tim put out little spoilers probably compensate fact towplane slowed down little entered climb Gets automatic after Applegate photo Fig 9 convoy its way t3eorge lot ot correction towplane trying hold runway heading Tim already started turn left climb wind sort uncoordinated behavior occurs glider may actually stop towplane Rudder shows Tim already initiated turn get back behind towplane picture taken Aberle photo rue rle caught Tim importaniiask re-trimming sailplane glide Trim everything sailplaning Aberle photo Fig 14 sun bounces highlights off leading edges Tims sailplane brings home spot landing Note spoilers well Out exercise stiff crosswind Aberla photo wind gusty 15-pound-test towline use less breaks too often 40-pound monofilament breaks now usually Bowline knot towplane end use Hangmans Knot sailplane end never has broken Power management tow pilots main con cern sets climb angle angle too steep will find torque sets up left-hand turn cant stopped aileron rudder has got solution let nose down bit can build up some flying speed total ground run measures out 25 yards really dont need lot space powertowing RC sailplanes fact system can set up fields too small usual 049 power-pods never need e would required winch high-start decent towplane pilot can launch whole sailplane contest winch crew walking back parachute first launch doubt Try see yourseW Special thanks order friends came out lend encouragement snap pictures Atnong Bob Aberle provided big slow trainer convinced us find better way Howie Applegate Bob Hare Cathy Blazeyewski gave up time lent talents task photodocumentation dad George M Myers kept pushing project along got discouraged and/or lazy started project nine months ago theres bit left learn about still Let us know what find out Editors Note August 26 Jamesburg NJ Tim won first placeby second last flight last contestat towplane/sailplane meet sponsored Flying Models George dad piloted Quickie 500 OS 60 FSR driving 13/5 prop Aquila flew 100-foot line Both craft towline releases George took third towplane piloted Timall family Tims first-place prize appropriate ride real sailplane courtesy Poocks Island Soar ing Inc Blairstown NJ Fig 17 Towplane lifts off about 26 yards start ground run moment liftoff sailplane pushed over level flight insure towplane will upset critical point flight Since camera taking photographs approximately seconds apart obvious added lift sailplanes wings gives JATO-like boost towplanes takeoff Note high convoy has gone second A-second after liftoff Bob photo 60 Model Aviation Fig 15 Spoilers such Aquila very handy speed control early stage takeoff sailplane has tendency over-run towplane times also make required spot landing lot easier manage George Myers pic 4 Fig 16 Sequential photographs Bob Hares motorized Minolta XD-i 1 shows Tim runs forward about 5 yards before releasing convoy flight allows towplane come under positive control situation Sailplane climbs 10 15 feet altitude towplane runs along ground levels off let towplane gain speed Tim puts up 10-yard markers assist team evaluating what happening Bob Hare photo