RADIO CONTROL SOARING Ieg.0 P ## first two-column set basic information resources beginning RC sailplane aerotowing Judging number events staged number magazine articles published topic last two years aerotowing growing rapidly interest sophistication Aerotow events held annually Elmira New York Fayetteville North Carolina Los Banos California other locations often drawing 50 pilots grace majesty launching aerotow plus opportunity cooperation interaction between sailplane pilots powerairplane pilots rare other areas Radio Control RC flying first aerotow seems awkward troublesome perhaps little dangerous OFB Old Flying Buddy Carl Bice Florida RC Scale modeler full-scale soaring pilot observed Think about first guy launch sailplane jerking air another airplanehe brother first guy eat oyster Full-scale RC model aerotow have come age decades common way launch full-scale sailplanes now recognized safest way launch long-span Scale model sailplanes first tried aerotow Thundervolts power flying club field Schenectady NY 1989 observed pros doing World Soaring Jamboree 1994 Los Banos 1996 participated Elmira Aerotow 1996 1997 have lost damaged airplane aerotow have winch launch number launch accidents Ive witnessed has far less single local regional national Thermal Duration contest Ive participated Preparation knowledge fundamental components flight safety flying success Aerotowing works best large sailplanesthose too big too heavy launched safely winch practical minimum span three meters about 120 inches have aerotowed 48-inch two-meter-span airplanes felt tiger tail whole way up February 1998 83 Aerotowing opportunity teamwork between power pilots sailplane pilots L-R Tony Napoleon Ben Willwerth Robin Lehman Ron Wahi Elmira Aerotow 96 Jim Armstrong DownEast Soaring Club president prepares hook up Rodel Modell ASK-21 resting launch dolly Peter George prepares launch Roke ASK-i 8 Tony few seconds after launch Peter Georges Roke ASK-18 Napoleon tow pilot has customized Robin Hood 99 Elmira 96 being towed Tony Napoleons Indy RO Robin Hood 99 familiar flying characteristics control inputs sailplane Beginning aerotow launches generate enough jitters introducing variable unfamiliar sailplane tow pilot key success operation must smooth accomplished flier substantial flight time tow aircraft sailplane pilot can anyone can confidently handle large aileron sailplane Sailplane preparation aerotow launch begins towline release mechanism servo operates wire captures loop line advancing wire captures towline withdrawing wire releases Both aircraft have towline releases case sailplane will release some reason capture mechanism mounted near nose sailplane although does have tip nose underneath wing winchlaunch towhooks can build sailplane towline release mechanism Essentially mount servo front compartment moves stiff wire across small hole fuselage wire can guided control pushrod outer tubing hole need 1/4 inch diameter See drawing way Scale sailplanes may use scale-like release mechanisms available such suppliers Critter Bits Hobby Lobby Sailplanes Unlimited Unbeaten Path Imports towline typically includes clip devices both ends sailplane pilots can insert string loop towline release devices ready area save time flightline swivel reduces line twisting tangling Some tow pilots use stretchy section smooth shock loads both aircraft others flag sailplane end towline makes easier confirm distance sailplane has fact released line Towlines about 150-pound test generally contain intentional weak-link section designed break line under stress conditions case airplane departs controlled flight intentional release cannot made Sometimes launch dolly small wheeled cart used especially training dolly holds sailplane foot off ground sets wing angle attack fixes rotation about three flight axes until sailplane gets up flight speed gains control authority Landing gear serve similar purpose tow airplane like use dolly first few launches makes job easier newbie sailplane pilots Aerotow Flight tow pilot sailplane pilot stand next other make communication easier After final radio check sailplane pilot advises tow pilot hes ready tow pilot begins takeoff roll towline connects models drawn tight tow pilot advances throttle begins takeoff roll sailplane lifts off begins flying first its up takeoff speed tow airplane lifts off cruising speed has reached pair begin climbing turn flight path tow becomes giant spiral keep two aircraft sight tow model formation leader sailplane pilot flies slightly above tow model stay out its wake Towine release mechanism Forwardmounted servo moves stiff wire across small hole fuselage ht Firs t Place Classic Olympic Ills known its ease building slow forgiving flying uncompromising quality Clear detailed plans photo illustrated instruction book make building easy Span 999 Area 928 sq Wing Loading 55 60 oz sq ft 2 Channel Radio Required 3 Channel Radio Required Spoiler Option Formerly AIRTRONICS Specialty Division Phone 760-744-1553 Fax 760-744-2133 84 Model Aviation * Wing 0 Stiff 4J Wire Rear 3/4 View FuselageServo Mid-section lr Tow Airplane Towline Release Dave Garwood Available Leading Hobby Dealers Contact Whyte Wings er Inquiries Invited sailplane flies larger-radius turns sailplane keep towline taut Following tow airplane substantially easier aileron sailplane has separate uncoupled rudder polyhedral model main job sailplane pilot keep wings level maintain correct height above tow airplane tow line will yaw sailplane banking turns needed Sometimes outside rudder needed sailplane keep towline taut tow sailplane will flying faster does its ownmuch faster prepared snappy control responses its newfound ability get out position quickly have highwind slope experience power flying experience will surprise case stay alert tow fly airplane dont let airplane fly two models may circle several times until desired release altitude attained point sailplane pilot declares ready release hits release switch transmitter drops line announces tow pilot off towline tow pilot dives away sailplane quickly loses altitude lands sets up next tow sailplane pilot begins search lift begins aerobatic routine result teamwork sailplane launch higher gentler aesthetic winch launch bungee launch capability method put sailplane part sky desired altitude makes want try again Next month Ill discuss tow airplane selection preparation tow pilots part flight Resources Aerotowing fascinating serious somewhat complex endeavor People have experience have written 4000-word articles about learn see Robin Lehmans treatment topic Sailplane & Electric Modeler S&EM Vol 2 No 2 Vol 2 No 3 Robins columns John Derstines articles recent issues R/C Soaring Digest RCSD Simon Cockers article June/July 1996 Quiet Flight international QFI Some Robins articles appear Sailplanes Unlimited web site wwwsailplanescom set six clear drawings towline release mechanisms sailpianes tow airplanes see Asher Carmichaels article June 1996 RCSD John Derstines web site wwwgeocitiescomlCapeCanaveral/Lab/5 739 Lee Murray has prepared index RCSD articles its available download Bill Bunny Kuhlmans website wwwhalcyoncomlbsquared/RCSDhtml get back issues subscriptions specialty publications contact publishers following addresses RIC Soaring Digest Box 2108 Wylie TX 75098-2 108 972 442-3910 E-mail rcsdigest@aolcom Sailplane & Electric Modeler Box 4267 W Richland WA 99353 509 627-0456 E-mail wilbyers@aolcom Quiet Flight international Traplet Publications Ltd Traplet House Severn Drive Upton-upon-Severn Worcestershire WR8 OJL OJL United Kingdom E-mail qfidj @waveridercouk Closing Quote Anyone stops learning old whether 20 80 Anyone keeps learning stays young greatest thing life keep mind young Henry Ford C HOBBIES Order Line 1-800 309 8314 Info Line 412 795 9344 241w Fax Order line 412-798-9857 will customize Hitec radio Focus 2 SS 72mlvtz AM 6595 Focus 4 FM w14 HS300** 12995 Focus 6 FM w14 ES-422 16095 flash 4 FM w13 ES-SOC 14295 flash 5 FM w14 ES422** 16695 Prism 7XF FM w/4 HS422** 21395 Prism7XS FM wlSpec w/4 ES422**25895 Prism 7X FM w/Spectra Tx only**19295 RDC Supreme Rx w/crystat**5995 535 Micro Ra w/crystal**6195 ES-SO Super Micro 16 ozlin**3195 ES-SO Sub Micro 31 or/in2595 ES-as Mighty Micro 38 or/in2995 HS-101 Mini 24 or/in2195 ES-205 BB Super mini 43 oz/m**2595 HS-225 Super MIni 50 az/in2995 ES-SOC Super Sport 42 ozlin**995 ES300BB Ball Bearing Sport1195 ES-422 Pro-servo 43 or/in1395 HS-425 BR Pro w/dual bearings**1795 ES-525 RB Hi Speed 47 oz/m**3295 HS-545 BR Hi Torque 62 ozlin**3295 US-SOS RB Hi Torque 77 oz/in53495 US-SiS MG Supr Torque /lO7oo/in* 4595 ES-700 SB Giant Scale 133 025*2895 HS-715 RB Sail Arm Servo3495 HS-725 BR Sail Winch Servo4595 HS-75 RB Retract 90 or/in553695 ** New Lower Prices CIRRUS SERVOS CS-20 Sub-Micro2299 CS-SO Pro Mini1999 CS-SO Standard Sport999 CS-SO RB Hi Torque1699 CS-SO MG Hi Torque metal gear2199 CS-70 RB Standard Pro1499 CS-SO MG Super Torque2299 CS-DO RB FsstlLow Profile1799 cs-mo RB Retract2499 CS-400 Giant Pro RB2199 CS-SOO Jumbo Pro Super Torque4499 AIRBORNE PACK SPECIALS Combos include RCD Supreme Receiver w/crystal switch harness & aileron ext #14 CS-SORB Hi-Torque1299S #24 CS-SOMG Hi-Torque14995 #34 CS-SO Standard Sport10195 #44 CS-7OBB Pro11995 #52 CS-SO RB Mini10295 #62 CS-400 BR Giant Pro10595 J&C Sound Security1995 J&C Fun-Bat2495 call 6-Pack special Specials Lanier & Jack Stafford Kits FULL SERVICE HOBBY STORE Shipping & Handling . $500 Continental USA Most Orders Shipped 24 hrs J & C Bobbies Street Penn Bills PA 15235 Visa Mastercard Discover Accepted Prices Subject Chasge Notice High ruiiuiiiuuiuuu Produ VRemote gain41SchulzePlug &ChargeTochnology V Spiral mounted Plow elementSpeed Slim 24beAuto Cell Count VDynamic linkAuto Charge Current _____________________________________________________________________I /Temperature436 cells up 3 packs compensationPc Intedace Also Available Act Competition GyroNew Radio Control Service Center Heading-Look Adjustable Pulse rate Micro Processor Controlled Complete Service Brands Servo Throw adjustment & Solders Directly Motor Dealer inquiries Welcome L RIc Direct 7750 Convoy Court San Diego Ca 92111 619277-4531 fax 619560-9695 WWWRC-DIRECTCOM 4 Since 1936
Edition: Model Aviation - 1998/02
Page Numbers: 83, 84, 85
RADIO CONTROL SOARING Ieg.0 P ## first two-column set basic information resources beginning RC sailplane aerotowing Judging number events staged number magazine articles published topic last two years aerotowing growing rapidly interest sophistication Aerotow events held annually Elmira New York Fayetteville North Carolina Los Banos California other locations often drawing 50 pilots grace majesty launching aerotow plus opportunity cooperation interaction between sailplane pilots powerairplane pilots rare other areas Radio Control RC flying first aerotow seems awkward troublesome perhaps little dangerous OFB Old Flying Buddy Carl Bice Florida RC Scale modeler full-scale soaring pilot observed Think about first guy launch sailplane jerking air another airplanehe brother first guy eat oyster Full-scale RC model aerotow have come age decades common way launch full-scale sailplanes now recognized safest way launch long-span Scale model sailplanes first tried aerotow Thundervolts power flying club field Schenectady NY 1989 observed pros doing World Soaring Jamboree 1994 Los Banos 1996 participated Elmira Aerotow 1996 1997 have lost damaged airplane aerotow have winch launch number launch accidents Ive witnessed has far less single local regional national Thermal Duration contest Ive participated Preparation knowledge fundamental components flight safety flying success Aerotowing works best large sailplanesthose too big too heavy launched safely winch practical minimum span three meters about 120 inches have aerotowed 48-inch two-meter-span airplanes felt tiger tail whole way up February 1998 83 Aerotowing opportunity teamwork between power pilots sailplane pilots L-R Tony Napoleon Ben Willwerth Robin Lehman Ron Wahi Elmira Aerotow 96 Jim Armstrong DownEast Soaring Club president prepares hook up Rodel Modell ASK-21 resting launch dolly Peter George prepares launch Roke ASK-i 8 Tony few seconds after launch Peter Georges Roke ASK-18 Napoleon tow pilot has customized Robin Hood 99 Elmira 96 being towed Tony Napoleons Indy RO Robin Hood 99 familiar flying characteristics control inputs sailplane Beginning aerotow launches generate enough jitters introducing variable unfamiliar sailplane tow pilot key success operation must smooth accomplished flier substantial flight time tow aircraft sailplane pilot can anyone can confidently handle large aileron sailplane Sailplane preparation aerotow launch begins towline release mechanism servo operates wire captures loop line advancing wire captures towline withdrawing wire releases Both aircraft have towline releases case sailplane will release some reason capture mechanism mounted near nose sailplane although does have tip nose underneath wing winchlaunch towhooks can build sailplane towline release mechanism Essentially mount servo front compartment moves stiff wire across small hole fuselage wire can guided control pushrod outer tubing hole need 1/4 inch diameter See drawing way Scale sailplanes may use scale-like release mechanisms available such suppliers Critter Bits Hobby Lobby Sailplanes Unlimited Unbeaten Path Imports towline typically includes clip devices both ends sailplane pilots can insert string loop towline release devices ready area save time flightline swivel reduces line twisting tangling Some tow pilots use stretchy section smooth shock loads both aircraft others flag sailplane end towline makes easier confirm distance sailplane has fact released line Towlines about 150-pound test generally contain intentional weak-link section designed break line under stress conditions case airplane departs controlled flight intentional release cannot made Sometimes launch dolly small wheeled cart used especially training dolly holds sailplane foot off ground sets wing angle attack fixes rotation about three flight axes until sailplane gets up flight speed gains control authority Landing gear serve similar purpose tow airplane like use dolly first few launches makes job easier newbie sailplane pilots Aerotow Flight tow pilot sailplane pilot stand next other make communication easier After final radio check sailplane pilot advises tow pilot hes ready tow pilot begins takeoff roll towline connects models drawn tight tow pilot advances throttle begins takeoff roll sailplane lifts off begins flying first its up takeoff speed tow airplane lifts off cruising speed has reached pair begin climbing turn flight path tow becomes giant spiral keep two aircraft sight tow model formation leader sailplane pilot flies slightly above tow model stay out its wake Towine release mechanism Forwardmounted servo moves stiff wire across small hole fuselage ht Firs t Place Classic Olympic Ills known its ease building slow forgiving flying uncompromising quality Clear detailed plans photo illustrated instruction book make building easy Span 999 Area 928 sq Wing Loading 55 60 oz sq ft 2 Channel Radio Required 3 Channel Radio Required Spoiler Option Formerly AIRTRONICS Specialty Division Phone 760-744-1553 Fax 760-744-2133 84 Model Aviation * Wing 0 Stiff 4J Wire Rear 3/4 View FuselageServo Mid-section lr Tow Airplane Towline Release Dave Garwood Available Leading Hobby Dealers Contact Whyte Wings er Inquiries Invited sailplane flies larger-radius turns sailplane keep towline taut Following tow airplane substantially easier aileron sailplane has separate uncoupled rudder polyhedral model main job sailplane pilot keep wings level maintain correct height above tow airplane tow line will yaw sailplane banking turns needed Sometimes outside rudder needed sailplane keep towline taut tow sailplane will flying faster does its ownmuch faster prepared snappy control responses its newfound ability get out position quickly have highwind slope experience power flying experience will surprise case stay alert tow fly airplane dont let airplane fly two models may circle several times until desired release altitude attained point sailplane pilot declares ready release hits release switch transmitter drops line announces tow pilot off towline tow pilot dives away sailplane quickly loses altitude lands sets up next tow sailplane pilot begins search lift begins aerobatic routine result teamwork sailplane launch higher gentler aesthetic winch launch bungee launch capability method put sailplane part sky desired altitude makes want try again Next month Ill discuss tow airplane selection preparation tow pilots part flight Resources Aerotowing fascinating serious somewhat complex endeavor People have experience have written 4000-word articles about learn see Robin Lehmans treatment topic Sailplane & Electric Modeler S&EM Vol 2 No 2 Vol 2 No 3 Robins columns John Derstines articles recent issues R/C Soaring Digest RCSD Simon Cockers article June/July 1996 Quiet Flight international QFI Some Robins articles appear Sailplanes Unlimited web site wwwsailplanescom set six clear drawings towline release mechanisms sailpianes tow airplanes see Asher Carmichaels article June 1996 RCSD John Derstines web site wwwgeocitiescomlCapeCanaveral/Lab/5 739 Lee Murray has prepared index RCSD articles its available download Bill Bunny Kuhlmans website wwwhalcyoncomlbsquared/RCSDhtml get back issues subscriptions specialty publications contact publishers following addresses RIC Soaring Digest Box 2108 Wylie TX 75098-2 108 972 442-3910 E-mail rcsdigest@aolcom Sailplane & Electric Modeler Box 4267 W Richland WA 99353 509 627-0456 E-mail wilbyers@aolcom Quiet Flight international Traplet Publications Ltd Traplet House Severn Drive Upton-upon-Severn Worcestershire WR8 OJL OJL United Kingdom E-mail qfidj @waveridercouk Closing Quote Anyone stops learning old whether 20 80 Anyone keeps learning stays young greatest thing life keep mind young Henry Ford C HOBBIES Order Line 1-800 309 8314 Info Line 412 795 9344 241w Fax Order line 412-798-9857 will customize Hitec radio Focus 2 SS 72mlvtz AM 6595 Focus 4 FM w14 HS300** 12995 Focus 6 FM w14 ES-422 16095 flash 4 FM w13 ES-SOC 14295 flash 5 FM w14 ES422** 16695 Prism 7XF FM w/4 HS422** 21395 Prism7XS FM wlSpec w/4 ES422**25895 Prism 7X FM w/Spectra Tx only**19295 RDC Supreme Rx w/crystat**5995 535 Micro Ra w/crystal**6195 ES-SO Super Micro 16 ozlin**3195 ES-SO Sub Micro 31 or/in2595 ES-as Mighty Micro 38 or/in2995 HS-101 Mini 24 or/in2195 ES-205 BB Super mini 43 oz/m**2595 HS-225 Super MIni 50 az/in2995 ES-SOC Super Sport 42 ozlin**995 ES300BB Ball Bearing Sport1195 ES-422 Pro-servo 43 or/in1395 HS-425 BR Pro w/dual bearings**1795 ES-525 RB Hi Speed 47 oz/m**3295 HS-545 BR Hi Torque 62 ozlin**3295 US-SOS RB Hi Torque 77 oz/in53495 US-SiS MG Supr Torque /lO7oo/in* 4595 ES-700 SB Giant Scale 133 025*2895 HS-715 RB Sail Arm Servo3495 HS-725 BR Sail Winch Servo4595 HS-75 RB Retract 90 or/in553695 ** New Lower Prices CIRRUS SERVOS CS-20 Sub-Micro2299 CS-SO Pro Mini1999 CS-SO Standard Sport999 CS-SO RB Hi Torque1699 CS-SO MG Hi Torque metal gear2199 CS-70 RB Standard Pro1499 CS-SO MG Super Torque2299 CS-DO RB FsstlLow Profile1799 cs-mo RB Retract2499 CS-400 Giant Pro RB2199 CS-SOO Jumbo Pro Super Torque4499 AIRBORNE PACK SPECIALS Combos include RCD Supreme Receiver w/crystal switch harness & aileron ext #14 CS-SORB Hi-Torque1299S #24 CS-SOMG Hi-Torque14995 #34 CS-SO Standard Sport10195 #44 CS-7OBB Pro11995 #52 CS-SO RB Mini10295 #62 CS-400 BR Giant Pro10595 J&C Sound Security1995 J&C Fun-Bat2495 call 6-Pack special Specials Lanier & Jack Stafford Kits FULL SERVICE HOBBY STORE Shipping & Handling . $500 Continental USA Most Orders Shipped 24 hrs J & C Bobbies Street Penn Bills PA 15235 Visa Mastercard Discover Accepted Prices Subject Chasge Notice High ruiiuiiiuuiuuu Produ VRemote gain41SchulzePlug &ChargeTochnology V Spiral mounted Plow elementSpeed Slim 24beAuto Cell Count VDynamic linkAuto Charge Current _____________________________________________________________________I /Temperature436 cells up 3 packs compensationPc Intedace Also Available Act Competition GyroNew Radio Control Service Center Heading-Look Adjustable Pulse rate Micro Processor Controlled Complete Service Brands Servo Throw adjustment & Solders Directly Motor Dealer inquiries Welcome L RIc Direct 7750 Convoy Court San Diego Ca 92111 619277-4531 fax 619560-9695 WWWRC-DIRECTCOM 4 Since 1936
Edition: Model Aviation - 1998/02
Page Numbers: 83, 84, 85
RADIO CONTROL SOARING Ieg.0 P ## first two-column set basic information resources beginning RC sailplane aerotowing Judging number events staged number magazine articles published topic last two years aerotowing growing rapidly interest sophistication Aerotow events held annually Elmira New York Fayetteville North Carolina Los Banos California other locations often drawing 50 pilots grace majesty launching aerotow plus opportunity cooperation interaction between sailplane pilots powerairplane pilots rare other areas Radio Control RC flying first aerotow seems awkward troublesome perhaps little dangerous OFB Old Flying Buddy Carl Bice Florida RC Scale modeler full-scale soaring pilot observed Think about first guy launch sailplane jerking air another airplanehe brother first guy eat oyster Full-scale RC model aerotow have come age decades common way launch full-scale sailplanes now recognized safest way launch long-span Scale model sailplanes first tried aerotow Thundervolts power flying club field Schenectady NY 1989 observed pros doing World Soaring Jamboree 1994 Los Banos 1996 participated Elmira Aerotow 1996 1997 have lost damaged airplane aerotow have winch launch number launch accidents Ive witnessed has far less single local regional national Thermal Duration contest Ive participated Preparation knowledge fundamental components flight safety flying success Aerotowing works best large sailplanesthose too big too heavy launched safely winch practical minimum span three meters about 120 inches have aerotowed 48-inch two-meter-span airplanes felt tiger tail whole way up February 1998 83 Aerotowing opportunity teamwork between power pilots sailplane pilots L-R Tony Napoleon Ben Willwerth Robin Lehman Ron Wahi Elmira Aerotow 96 Jim Armstrong DownEast Soaring Club president prepares hook up Rodel Modell ASK-21 resting launch dolly Peter George prepares launch Roke ASK-i 8 Tony few seconds after launch Peter Georges Roke ASK-18 Napoleon tow pilot has customized Robin Hood 99 Elmira 96 being towed Tony Napoleons Indy RO Robin Hood 99 familiar flying characteristics control inputs sailplane Beginning aerotow launches generate enough jitters introducing variable unfamiliar sailplane tow pilot key success operation must smooth accomplished flier substantial flight time tow aircraft sailplane pilot can anyone can confidently handle large aileron sailplane Sailplane preparation aerotow launch begins towline release mechanism servo operates wire captures loop line advancing wire captures towline withdrawing wire releases Both aircraft have towline releases case sailplane will release some reason capture mechanism mounted near nose sailplane although does have tip nose underneath wing winchlaunch towhooks can build sailplane towline release mechanism Essentially mount servo front compartment moves stiff wire across small hole fuselage wire can guided control pushrod outer tubing hole need 1/4 inch diameter See drawing way Scale sailplanes may use scale-like release mechanisms available such suppliers Critter Bits Hobby Lobby Sailplanes Unlimited Unbeaten Path Imports towline typically includes clip devices both ends sailplane pilots can insert string loop towline release devices ready area save time flightline swivel reduces line twisting tangling Some tow pilots use stretchy section smooth shock loads both aircraft others flag sailplane end towline makes easier confirm distance sailplane has fact released line Towlines about 150-pound test generally contain intentional weak-link section designed break line under stress conditions case airplane departs controlled flight intentional release cannot made Sometimes launch dolly small wheeled cart used especially training dolly holds sailplane foot off ground sets wing angle attack fixes rotation about three flight axes until sailplane gets up flight speed gains control authority Landing gear serve similar purpose tow airplane like use dolly first few launches makes job easier newbie sailplane pilots Aerotow Flight tow pilot sailplane pilot stand next other make communication easier After final radio check sailplane pilot advises tow pilot hes ready tow pilot begins takeoff roll towline connects models drawn tight tow pilot advances throttle begins takeoff roll sailplane lifts off begins flying first its up takeoff speed tow airplane lifts off cruising speed has reached pair begin climbing turn flight path tow becomes giant spiral keep two aircraft sight tow model formation leader sailplane pilot flies slightly above tow model stay out its wake Towine release mechanism Forwardmounted servo moves stiff wire across small hole fuselage ht Firs t Place Classic Olympic Ills known its ease building slow forgiving flying uncompromising quality Clear detailed plans photo illustrated instruction book make building easy Span 999 Area 928 sq Wing Loading 55 60 oz sq ft 2 Channel Radio Required 3 Channel Radio Required Spoiler Option Formerly AIRTRONICS Specialty Division Phone 760-744-1553 Fax 760-744-2133 84 Model Aviation * Wing 0 Stiff 4J Wire Rear 3/4 View FuselageServo Mid-section lr Tow Airplane Towline Release Dave Garwood Available Leading Hobby Dealers Contact Whyte Wings er Inquiries Invited sailplane flies larger-radius turns sailplane keep towline taut Following tow airplane substantially easier aileron sailplane has separate uncoupled rudder polyhedral model main job sailplane pilot keep wings level maintain correct height above tow airplane tow line will yaw sailplane banking turns needed Sometimes outside rudder needed sailplane keep towline taut tow sailplane will flying faster does its ownmuch faster prepared snappy control responses its newfound ability get out position quickly have highwind slope experience power flying experience will surprise case stay alert tow fly airplane dont let airplane fly two models may circle several times until desired release altitude attained point sailplane pilot declares ready release hits release switch transmitter drops line announces tow pilot off towline tow pilot dives away sailplane quickly loses altitude lands sets up next tow sailplane pilot begins search lift begins aerobatic routine result teamwork sailplane launch higher gentler aesthetic winch launch bungee launch capability method put sailplane part sky desired altitude makes want try again Next month Ill discuss tow airplane selection preparation tow pilots part flight Resources Aerotowing fascinating serious somewhat complex endeavor People have experience have written 4000-word articles about learn see Robin Lehmans treatment topic Sailplane & Electric Modeler S&EM Vol 2 No 2 Vol 2 No 3 Robins columns John Derstines articles recent issues R/C Soaring Digest RCSD Simon Cockers article June/July 1996 Quiet Flight international QFI Some Robins articles appear Sailplanes Unlimited web site wwwsailplanescom set six clear drawings towline release mechanisms sailpianes tow airplanes see Asher Carmichaels article June 1996 RCSD John Derstines web site wwwgeocitiescomlCapeCanaveral/Lab/5 739 Lee Murray has prepared index RCSD articles its available download Bill Bunny Kuhlmans website wwwhalcyoncomlbsquared/RCSDhtml get back issues subscriptions specialty publications contact publishers following addresses RIC Soaring Digest Box 2108 Wylie TX 75098-2 108 972 442-3910 E-mail rcsdigest@aolcom Sailplane & Electric Modeler Box 4267 W Richland WA 99353 509 627-0456 E-mail wilbyers@aolcom Quiet Flight international Traplet Publications Ltd Traplet House Severn Drive Upton-upon-Severn Worcestershire WR8 OJL OJL United Kingdom E-mail qfidj @waveridercouk Closing Quote Anyone stops learning old whether 20 80 Anyone keeps learning stays young greatest thing life keep mind young Henry Ford C HOBBIES Order Line 1-800 309 8314 Info Line 412 795 9344 241w Fax Order line 412-798-9857 will customize Hitec radio Focus 2 SS 72mlvtz AM 6595 Focus 4 FM w14 HS300** 12995 Focus 6 FM w14 ES-422 16095 flash 4 FM w13 ES-SOC 14295 flash 5 FM w14 ES422** 16695 Prism 7XF FM w/4 HS422** 21395 Prism7XS FM wlSpec w/4 ES422**25895 Prism 7X FM w/Spectra Tx only**19295 RDC Supreme Rx w/crystat**5995 535 Micro Ra w/crystal**6195 ES-SO Super Micro 16 ozlin**3195 ES-SO Sub Micro 31 or/in2595 ES-as Mighty Micro 38 or/in2995 HS-101 Mini 24 or/in2195 ES-205 BB Super mini 43 oz/m**2595 HS-225 Super MIni 50 az/in2995 ES-SOC Super Sport 42 ozlin**995 ES300BB Ball Bearing Sport1195 ES-422 Pro-servo 43 or/in1395 HS-425 BR Pro w/dual bearings**1795 ES-525 RB Hi Speed 47 oz/m**3295 HS-545 BR Hi Torque 62 ozlin**3295 US-SOS RB Hi Torque 77 oz/in53495 US-SiS MG Supr Torque /lO7oo/in* 4595 ES-700 SB Giant Scale 133 025*2895 HS-715 RB Sail Arm Servo3495 HS-725 BR Sail Winch Servo4595 HS-75 RB Retract 90 or/in553695 ** New Lower Prices CIRRUS SERVOS CS-20 Sub-Micro2299 CS-SO Pro Mini1999 CS-SO Standard Sport999 CS-SO RB Hi Torque1699 CS-SO MG Hi Torque metal gear2199 CS-70 RB Standard Pro1499 CS-SO MG Super Torque2299 CS-DO RB FsstlLow Profile1799 cs-mo RB Retract2499 CS-400 Giant Pro RB2199 CS-SOO Jumbo Pro Super Torque4499 AIRBORNE PACK SPECIALS Combos include RCD Supreme Receiver w/crystal switch harness & aileron ext #14 CS-SORB Hi-Torque1299S #24 CS-SOMG Hi-Torque14995 #34 CS-SO Standard Sport10195 #44 CS-7OBB Pro11995 #52 CS-SO RB Mini10295 #62 CS-400 BR Giant Pro10595 J&C Sound Security1995 J&C Fun-Bat2495 call 6-Pack special Specials Lanier & Jack Stafford Kits FULL SERVICE HOBBY STORE Shipping & Handling . $500 Continental USA Most Orders Shipped 24 hrs J & C Bobbies Street Penn Bills PA 15235 Visa Mastercard Discover Accepted Prices Subject Chasge Notice High ruiiuiiiuuiuuu Produ VRemote gain41SchulzePlug &ChargeTochnology V Spiral mounted Plow elementSpeed Slim 24beAuto Cell Count VDynamic linkAuto Charge Current _____________________________________________________________________I /Temperature436 cells up 3 packs compensationPc Intedace Also Available Act Competition GyroNew Radio Control Service Center Heading-Look Adjustable Pulse rate Micro Processor Controlled Complete Service Brands Servo Throw adjustment & Solders Directly Motor Dealer inquiries Welcome L RIc Direct 7750 Convoy Court San Diego Ca 92111 619277-4531 fax 619560-9695 WWWRC-DIRECTCOM 4 Since 1936