THE GREAT Bi-Centennial RC Sail plane race Open first 17 AMA chartered clubs pre-register club frequency task will cross-country goal return racetotal distance 76 kilometers got 1776 Scheduled July 17 conjunction Seventh SOAR Nationals race will have following restrictions I Open AMA chartered clubs 2 One entry per club 3 No restrictions sailplane func tions sailplane must within AMA size weight criteria 4 Sailplane must have red white blue color scheme carry patriotic slogan theme press lettering works good 5 A club may enter sailplane flier 6 One back-up flier will allowed 7 Both fliers must LSFlevel III higher 8 Individual clubs must provide least following a an assistant back-up flier can serve assistant b chase vehicle c timer timer exchanged other clubs d own launch equipment maximum launch poten tial 300 meters will allowed hand-tow high-start winch de vices 9 Any number re-launches will allowed during race SOAR will provide winches initial launch 10 Sailplanes entered task need entered regular SOAR Nationals competition however pilots must Prizes will include awards short est overall time longest leg least number launches patriotic looking sailplane So make club effort Pick continued page 87 WINCH STARTER MOTOR SOLONOID\W REGULAR SIITCHA LOAD LIMITINGJ SWITCH B ERY WIRING DIAGRAM Soaring Hugh Stock flying Magnum l2as John Bax ter launches John first Level V Picture taken 1975 1SF Tournament Dan Pruss Below Chet Atkins scale Caproni spans 11 ft. weighs 85 lbs fiberglass fuselage Scratchbuilt its Chets threat 76 competition New concept winches does away line breakage Illii SCALE TOWLINE WINCH CG PLATFORMS BASE Lvj WINCH OUTLINE LOAD-LIMITING SPRING AND CH II DETAIL BELOW k COMPRESSION ADJUSTING NUT LARGE WASHER HEAVY SPRING PLATFORM WLJ /7/ SWITCH CONTACTS BASE LOAD-LIMITING SPRING AND SWITCH DETAILS CHET TUTH ILL 12-2-75 14 Model Aviation PIVOT GENERAL ARRANGEMENT best fliers best builders let artistically inclined allow brushes palettes help project After idea foregoing first conceived feeler put out few sailplane enthusiasts around country reaction such event couldnt have enthusiastic Italy polled possible re newal Mule Miglia youre com ing SOAR Nationals plan coming early just might see event could usher whole new concept inter-club competition regular competition Seventh Soaring Nationals will held Lewis University Lockport IL July 19-20-21 following TGB-CR/CSR Events year will include three sailplane classes per definitions AMA rules However will no class jumping Sailplanes meet specifics classes B C must fly respective class wild card feature will again used year enables flier use last round flying better either precision duration scores modelers getting geared FAI program year decided duration tasks will six mmutes max allowable line length 200 meters will also used 300-meter lines scale using AMA/NSS provi sional rules past limitation 15 con testants per frequency has raised 20 Again awards will given team competition best design best techni cal achievement further details entry form send SASE address end column no doubt soaring has greatest competition flier/sport flier ratios RC flying years contest calendar helps bear out FAI team selection program contest season itselfis well underway Jim SimpsonFAI Contest Coordinatorsays already 16 clubs have plans quarter-finals cluded Blairsville PA York PA Colorado Springs Denver Clovis NM Washington DC Chicago Miami Idaho Wyoming working out specific sites Spokane Los Angeles Fort Worth Fort Wayne Tullahoma TN Elmira will host quarter-finals semi-finals Remember quarterfinals held during Maythe semi finals over July 4th weekend finals will Denver change ear lier announced Albuquerque site over Labor Day weekend still have time plan competing moreover club wants host quarter-final time too particulars write Jim Simpson 1437 Norwood Hurst TX 76053 817 282-5735 John Nielsenfinance chairman FAI program has program well un derway appealing us soaring back US team South Africa becoming team supporter qualify itll cost ten bucks youll get bumper sticker telling others backing USA RC Sailplane team thats receive ten dollars will also get dozen chances list prizes would make planners state lottery envious Through gen erosity some manufacturers names should emblazoned neon lights following prizes will raffled since prizes will drawn ran dom winners list donors listed random ten-speed May1976 87 RC Soaring/Pruss continued page 14 JASCO DESIGNS FOR JUNIORS fling-hi G1 3-12 SPAN lENOTIt 15 Ready-Cot RCIAL Balsa wing tail toselage Hand O offer robber-band launch Bout AMA coupon adjootments assure goOd listing Othnrs X-12 X-18 & 0-24 SCHOOlS 0-12 ideal classroom study Write tor pricesadd 350 ByMaul Box 135 Northredge Ca91324 Note Jets Friends last ad Jefs Friends publicly challenged Radio Control Modeler Magazine actually test Western Wind -our cardboard sailplane Challenge necessary because RCM published misleading review Western Wind trying RCM never took up challenge know what would have happened heres what happened Taylor Collins flew Western Wind review January 1976 issue Model Builder very complete article said1 Since ship is. very inexpensive beginner can throw off cliff being terrified total cash outlay complete Western Wind other radio will exceed S400 Construction easily completed two three hours rudder quite responsive Elevator response adequate normal flying can reduced training purposes will probably never break Western Wind tough R/C Sportsman Dr Larry Fogel commented1 can testify cardboard creation really flies cited its durability too Western Wind has proved itself glad can now devote efforts supplying flyers good airplanes Western Winds stocked dealers distributors locally available can order direct Jets Friends Box 511 Brisbane CA 94005 Send Si 295 plus $125 shipping California residents add 6% sales tax 585 RC Soaring continued Schwinn bicycle $425 crate balsa wood Midwest Products Co call life-time supply just five 25-ft rolls Monokote iron lop Elite Two Magnum 12s Soarcraft Du-Bro Tri*Star helicopter Kraft 61 engine sixcount emradios EK Logictrol Cox/Sanwa Airtronics Aquila radioa Gere Biplane radio engine Q-Tee engine radio Youll note some prizes non-sail plane field will enable en courage other-than-sailplane-enthu siasts word just few left get raffle Support team Support manu facturers subject contests AMA Nationals Dayton will have three-day soaring event under CD Bob Miller DARTS Because heavy schedule es pecially among clubs supporting FAI eliminations LSF Tournament will one-site contest again year San Francisco general area Contest Director Kirby Parker LSF/721 going take blame year Details become available October 1975 issue Model Aviation near solution tow-line breakage described proposed Greater Detroit Lansing fliers month Chet Tuthill Coffee Airfoil ers has sent us drawings better mousetrap Jim Robinsons article follows Answer Towline Breakage problem plagues RC soaring community problem towline breakage forces contest director rule favor re-flight contest ant though knows own mind contestant involved will routinely the contest will con sistently break line worries other contestants line breakage oc curs because follow launch line broke afraid weakened line Also line breakage always seems occur wrong time some times resulting rapid re-kitting model tow nearly always re sults few hairy moments pilot spasms during recovery answer will prevent line breakage will place cause defi nitely being fault line contestants will take decision making away CD because contestant will get automatic re-flight line breaks answer lies maxi mum available line force set below floor-boards winch will get maxWANTED ideas happenings hints/kinks how-to sketches photos news etc Send columnist category concernedat address shown column photo idea printed Model Aviation will pay $5 contributor lines breaking strength contestant imum force available using usual pulsing action known around Tennessee Toe-Tap can ob tain desired tow regular manner Thus system functions winches up allowable maximum load fear breaking line sys tem will work winch 12-volt 6volt 2-in drum 4-in drum whatever system requires no modification winch can calibrated re quired very easily system devised Jim Robinson Coffee Airfoilers shown figure heart system mount winch placed mount held down weight winch can further restrained deemed neces sary platform supports winch attached base way pivot rod Rotation platform about rod restricted compression spring Rotation platform caused pull towline sensed switch cuts power solenoid pull reaches pre-set value pull does reach pre-set value nothing happens As pull exceeds pre-set value power winch cut pull reduced power restored cycle repeats cyclically required maintain applied force pre-set limit pre-set value below line breakage point Actual operation easier describe words amount allowable force easily varied screwing out nut spring rod holding fish scale equivalent noting pull exerted towline Try itit works youll like New Clubs Well through first year activities under wings Western Pennsylvania Conference Soaring Dave Burt Gene Shelkey Co have got Blairsville PA area off ground So youre interested joining RC Sailplane Club youre area contact either above Addresses Dave Burt 180 5 8th St Apt 4 Indiana PA 15701 Gene Shelkey 217 Euclid Ave Scottdale PA 15683 newly formed Mid-Ohio Soaring Society MOSS made up least 24 members Columbus area first effort club newsletter excel lent youre looking thermals club Mid-Ohio contact William F Duemmel 7766 Candlewood Lane Wor thington OH 43085 subject ad dresses National Soaring Society NSS $10 c/o Stanley Pfost 1481 Howell Branch Rd Winter Park FL 32789 League Silent Flight LSFFree PO Box 39068 Dept AM Chicago IL 60639 address Dan Pruss Box 490 Dept AM Plainfield IL 60544 88 Model Aviation FINE QUALITY KITS AND ACCESSORIES 1 72 SCALE PLASTIC KITS FLYING MODEL ACCESSORIES SPINNERS TS LS ENGINE KITS INEGUNS CYLINDERS L PANTS SCALE DRAWINGS PIES SEND 25 FOR COMPLETE CATALOG DEPT MA 4LLIAMS 181 PAWNEE STREET •mosMARCOS CA
Edition: Model Aviation - 1976/05
Page Numbers: 14, 87, 88
Edition: Model Aviation - 1976/05
Page Numbers: 14, 87, 88
THE GREAT Bi-Centennial RC Sail plane race Open first 17 AMA chartered clubs pre-register club frequency task will cross-country goal return racetotal distance 76 kilometers got 1776 Scheduled July 17 conjunction Seventh SOAR Nationals race will have following restrictions I Open AMA chartered clubs 2 One entry per club 3 No restrictions sailplane func tions sailplane must within AMA size weight criteria 4 Sailplane must have red white blue color scheme carry patriotic slogan theme press lettering works good 5 A club may enter sailplane flier 6 One back-up flier will allowed 7 Both fliers must LSFlevel III higher 8 Individual clubs must provide least following a an assistant back-up flier can serve assistant b chase vehicle c timer timer exchanged other clubs d own launch equipment maximum launch poten tial 300 meters will allowed hand-tow high-start winch de vices 9 Any number re-launches will allowed during race SOAR will provide winches initial launch 10 Sailplanes entered task need entered regular SOAR Nationals competition however pilots must Prizes will include awards short est overall time longest leg least number launches patriotic looking sailplane So make club effort Pick continued page 87 WINCH STARTER MOTOR SOLONOID\W REGULAR SIITCHA LOAD LIMITINGJ SWITCH B ERY WIRING DIAGRAM Soaring Hugh Stock flying Magnum l2as John Bax ter launches John first Level V Picture taken 1975 1SF Tournament Dan Pruss Below Chet Atkins scale Caproni spans 11 ft. weighs 85 lbs fiberglass fuselage Scratchbuilt its Chets threat 76 competition New concept winches does away line breakage Illii SCALE TOWLINE WINCH CG PLATFORMS BASE Lvj WINCH OUTLINE LOAD-LIMITING SPRING AND CH II DETAIL BELOW k COMPRESSION ADJUSTING NUT LARGE WASHER HEAVY SPRING PLATFORM WLJ /7/ SWITCH CONTACTS BASE LOAD-LIMITING SPRING AND SWITCH DETAILS CHET TUTH ILL 12-2-75 14 Model Aviation PIVOT GENERAL ARRANGEMENT best fliers best builders let artistically inclined allow brushes palettes help project After idea foregoing first conceived feeler put out few sailplane enthusiasts around country reaction such event couldnt have enthusiastic Italy polled possible re newal Mule Miglia youre com ing SOAR Nationals plan coming early just might see event could usher whole new concept inter-club competition regular competition Seventh Soaring Nationals will held Lewis University Lockport IL July 19-20-21 following TGB-CR/CSR Events year will include three sailplane classes per definitions AMA rules However will no class jumping Sailplanes meet specifics classes B C must fly respective class wild card feature will again used year enables flier use last round flying better either precision duration scores modelers getting geared FAI program year decided duration tasks will six mmutes max allowable line length 200 meters will also used 300-meter lines scale using AMA/NSS provi sional rules past limitation 15 con testants per frequency has raised 20 Again awards will given team competition best design best techni cal achievement further details entry form send SASE address end column no doubt soaring has greatest competition flier/sport flier ratios RC flying years contest calendar helps bear out FAI team selection program contest season itselfis well underway Jim SimpsonFAI Contest Coordinatorsays already 16 clubs have plans quarter-finals cluded Blairsville PA York PA Colorado Springs Denver Clovis NM Washington DC Chicago Miami Idaho Wyoming working out specific sites Spokane Los Angeles Fort Worth Fort Wayne Tullahoma TN Elmira will host quarter-finals semi-finals Remember quarterfinals held during Maythe semi finals over July 4th weekend finals will Denver change ear lier announced Albuquerque site over Labor Day weekend still have time plan competing moreover club wants host quarter-final time too particulars write Jim Simpson 1437 Norwood Hurst TX 76053 817 282-5735 John Nielsenfinance chairman FAI program has program well un derway appealing us soaring back US team South Africa becoming team supporter qualify itll cost ten bucks youll get bumper sticker telling others backing USA RC Sailplane team thats receive ten dollars will also get dozen chances list prizes would make planners state lottery envious Through gen erosity some manufacturers names should emblazoned neon lights following prizes will raffled since prizes will drawn ran dom winners list donors listed random ten-speed May1976 87 RC Soaring/Pruss continued page 14 JASCO DESIGNS FOR JUNIORS fling-hi G1 3-12 SPAN lENOTIt 15 Ready-Cot RCIAL Balsa wing tail toselage Hand O offer robber-band launch Bout AMA coupon adjootments assure goOd listing Othnrs X-12 X-18 & 0-24 SCHOOlS 0-12 ideal classroom study Write tor pricesadd 350 ByMaul Box 135 Northredge Ca91324 Note Jets Friends last ad Jefs Friends publicly challenged Radio Control Modeler Magazine actually test Western Wind -our cardboard sailplane Challenge necessary because RCM published misleading review Western Wind trying RCM never took up challenge know what would have happened heres what happened Taylor Collins flew Western Wind review January 1976 issue Model Builder very complete article said1 Since ship is. very inexpensive beginner can throw off cliff being terrified total cash outlay complete Western Wind other radio will exceed S400 Construction easily completed two three hours rudder quite responsive Elevator response adequate normal flying can reduced training purposes will probably never break Western Wind tough R/C Sportsman Dr Larry Fogel commented1 can testify cardboard creation really flies cited its durability too Western Wind has proved itself glad can now devote efforts supplying flyers good airplanes Western Winds stocked dealers distributors locally available can order direct Jets Friends Box 511 Brisbane CA 94005 Send Si 295 plus $125 shipping California residents add 6% sales tax 585 RC Soaring continued Schwinn bicycle $425 crate balsa wood Midwest Products Co call life-time supply just five 25-ft rolls Monokote iron lop Elite Two Magnum 12s Soarcraft Du-Bro Tri*Star helicopter Kraft 61 engine sixcount emradios EK Logictrol Cox/Sanwa Airtronics Aquila radioa Gere Biplane radio engine Q-Tee engine radio Youll note some prizes non-sail plane field will enable en courage other-than-sailplane-enthu siasts word just few left get raffle Support team Support manu facturers subject contests AMA Nationals Dayton will have three-day soaring event under CD Bob Miller DARTS Because heavy schedule es pecially among clubs supporting FAI eliminations LSF Tournament will one-site contest again year San Francisco general area Contest Director Kirby Parker LSF/721 going take blame year Details become available October 1975 issue Model Aviation near solution tow-line breakage described proposed Greater Detroit Lansing fliers month Chet Tuthill Coffee Airfoil ers has sent us drawings better mousetrap Jim Robinsons article follows Answer Towline Breakage problem plagues RC soaring community problem towline breakage forces contest director rule favor re-flight contest ant though knows own mind contestant involved will routinely the contest will con sistently break line worries other contestants line breakage oc curs because follow launch line broke afraid weakened line Also line breakage always seems occur wrong time some times resulting rapid re-kitting model tow nearly always re sults few hairy moments pilot spasms during recovery answer will prevent line breakage will place cause defi nitely being fault line contestants will take decision making away CD because contestant will get automatic re-flight line breaks answer lies maxi mum available line force set below floor-boards winch will get maxWANTED ideas happenings hints/kinks how-to sketches photos news etc Send columnist category concernedat address shown column photo idea printed Model Aviation will pay $5 contributor lines breaking strength contestant imum force available using usual pulsing action known around Tennessee Toe-Tap can ob tain desired tow regular manner Thus system functions winches up allowable maximum load fear breaking line sys tem will work winch 12-volt 6volt 2-in drum 4-in drum whatever system requires no modification winch can calibrated re quired very easily system devised Jim Robinson Coffee Airfoilers shown figure heart system mount winch placed mount held down weight winch can further restrained deemed neces sary platform supports winch attached base way pivot rod Rotation platform about rod restricted compression spring Rotation platform caused pull towline sensed switch cuts power solenoid pull reaches pre-set value pull does reach pre-set value nothing happens As pull exceeds pre-set value power winch cut pull reduced power restored cycle repeats cyclically required maintain applied force pre-set limit pre-set value below line breakage point Actual operation easier describe words amount allowable force easily varied screwing out nut spring rod holding fish scale equivalent noting pull exerted towline Try itit works youll like New Clubs Well through first year activities under wings Western Pennsylvania Conference Soaring Dave Burt Gene Shelkey Co have got Blairsville PA area off ground So youre interested joining RC Sailplane Club youre area contact either above Addresses Dave Burt 180 5 8th St Apt 4 Indiana PA 15701 Gene Shelkey 217 Euclid Ave Scottdale PA 15683 newly formed Mid-Ohio Soaring Society MOSS made up least 24 members Columbus area first effort club newsletter excel lent youre looking thermals club Mid-Ohio contact William F Duemmel 7766 Candlewood Lane Wor thington OH 43085 subject ad dresses National Soaring Society NSS $10 c/o Stanley Pfost 1481 Howell Branch Rd Winter Park FL 32789 League Silent Flight LSFFree PO Box 39068 Dept AM Chicago IL 60639 address Dan Pruss Box 490 Dept AM Plainfield IL 60544 88 Model Aviation FINE QUALITY KITS AND ACCESSORIES 1 72 SCALE PLASTIC KITS FLYING MODEL ACCESSORIES SPINNERS TS LS ENGINE KITS INEGUNS CYLINDERS L PANTS SCALE DRAWINGS PIES SEND 25 FOR COMPLETE CATALOG DEPT MA 4LLIAMS 181 PAWNEE STREET •mosMARCOS CA
Edition: Model Aviation - 1976/05
Page Numbers: 14, 87, 88
THE GREAT Bi-Centennial RC Sail plane race Open first 17 AMA chartered clubs pre-register club frequency task will cross-country goal return racetotal distance 76 kilometers got 1776 Scheduled July 17 conjunction Seventh SOAR Nationals race will have following restrictions I Open AMA chartered clubs 2 One entry per club 3 No restrictions sailplane func tions sailplane must within AMA size weight criteria 4 Sailplane must have red white blue color scheme carry patriotic slogan theme press lettering works good 5 A club may enter sailplane flier 6 One back-up flier will allowed 7 Both fliers must LSFlevel III higher 8 Individual clubs must provide least following a an assistant back-up flier can serve assistant b chase vehicle c timer timer exchanged other clubs d own launch equipment maximum launch poten tial 300 meters will allowed hand-tow high-start winch de vices 9 Any number re-launches will allowed during race SOAR will provide winches initial launch 10 Sailplanes entered task need entered regular SOAR Nationals competition however pilots must Prizes will include awards short est overall time longest leg least number launches patriotic looking sailplane So make club effort Pick continued page 87 WINCH STARTER MOTOR SOLONOID\W REGULAR SIITCHA LOAD LIMITINGJ SWITCH B ERY WIRING DIAGRAM Soaring Hugh Stock flying Magnum l2as John Bax ter launches John first Level V Picture taken 1975 1SF Tournament Dan Pruss Below Chet Atkins scale Caproni spans 11 ft. weighs 85 lbs fiberglass fuselage Scratchbuilt its Chets threat 76 competition New concept winches does away line breakage Illii SCALE TOWLINE WINCH CG PLATFORMS BASE Lvj WINCH OUTLINE LOAD-LIMITING SPRING AND CH II DETAIL BELOW k COMPRESSION ADJUSTING NUT LARGE WASHER HEAVY SPRING PLATFORM WLJ /7/ SWITCH CONTACTS BASE LOAD-LIMITING SPRING AND SWITCH DETAILS CHET TUTH ILL 12-2-75 14 Model Aviation PIVOT GENERAL ARRANGEMENT best fliers best builders let artistically inclined allow brushes palettes help project After idea foregoing first conceived feeler put out few sailplane enthusiasts around country reaction such event couldnt have enthusiastic Italy polled possible re newal Mule Miglia youre com ing SOAR Nationals plan coming early just might see event could usher whole new concept inter-club competition regular competition Seventh Soaring Nationals will held Lewis University Lockport IL July 19-20-21 following TGB-CR/CSR Events year will include three sailplane classes per definitions AMA rules However will no class jumping Sailplanes meet specifics classes B C must fly respective class wild card feature will again used year enables flier use last round flying better either precision duration scores modelers getting geared FAI program year decided duration tasks will six mmutes max allowable line length 200 meters will also used 300-meter lines scale using AMA/NSS provi sional rules past limitation 15 con testants per frequency has raised 20 Again awards will given team competition best design best techni cal achievement further details entry form send SASE address end column no doubt soaring has greatest competition flier/sport flier ratios RC flying years contest calendar helps bear out FAI team selection program contest season itselfis well underway Jim SimpsonFAI Contest Coordinatorsays already 16 clubs have plans quarter-finals cluded Blairsville PA York PA Colorado Springs Denver Clovis NM Washington DC Chicago Miami Idaho Wyoming working out specific sites Spokane Los Angeles Fort Worth Fort Wayne Tullahoma TN Elmira will host quarter-finals semi-finals Remember quarterfinals held during Maythe semi finals over July 4th weekend finals will Denver change ear lier announced Albuquerque site over Labor Day weekend still have time plan competing moreover club wants host quarter-final time too particulars write Jim Simpson 1437 Norwood Hurst TX 76053 817 282-5735 John Nielsenfinance chairman FAI program has program well un derway appealing us soaring back US team South Africa becoming team supporter qualify itll cost ten bucks youll get bumper sticker telling others backing USA RC Sailplane team thats receive ten dollars will also get dozen chances list prizes would make planners state lottery envious Through gen erosity some manufacturers names should emblazoned neon lights following prizes will raffled since prizes will drawn ran dom winners list donors listed random ten-speed May1976 87 RC Soaring/Pruss continued page 14 JASCO DESIGNS FOR JUNIORS fling-hi G1 3-12 SPAN lENOTIt 15 Ready-Cot RCIAL Balsa wing tail toselage Hand O offer robber-band launch Bout AMA coupon adjootments assure goOd listing Othnrs X-12 X-18 & 0-24 SCHOOlS 0-12 ideal classroom study Write tor pricesadd 350 ByMaul Box 135 Northredge Ca91324 Note Jets Friends last ad Jefs Friends publicly challenged Radio Control Modeler Magazine actually test Western Wind -our cardboard sailplane Challenge necessary because RCM published misleading review Western Wind trying RCM never took up challenge know what would have happened heres what happened Taylor Collins flew Western Wind review January 1976 issue Model Builder very complete article said1 Since ship is. very inexpensive beginner can throw off cliff being terrified total cash outlay complete Western Wind other radio will exceed S400 Construction easily completed two three hours rudder quite responsive Elevator response adequate normal flying can reduced training purposes will probably never break Western Wind tough R/C Sportsman Dr Larry Fogel commented1 can testify cardboard creation really flies cited its durability too Western Wind has proved itself glad can now devote efforts supplying flyers good airplanes Western Winds stocked dealers distributors locally available can order direct Jets Friends Box 511 Brisbane CA 94005 Send Si 295 plus $125 shipping California residents add 6% sales tax 585 RC Soaring continued Schwinn bicycle $425 crate balsa wood Midwest Products Co call life-time supply just five 25-ft rolls Monokote iron lop Elite Two Magnum 12s Soarcraft Du-Bro Tri*Star helicopter Kraft 61 engine sixcount emradios EK Logictrol Cox/Sanwa Airtronics Aquila radioa Gere Biplane radio engine Q-Tee engine radio Youll note some prizes non-sail plane field will enable en courage other-than-sailplane-enthu siasts word just few left get raffle Support team Support manu facturers subject contests AMA Nationals Dayton will have three-day soaring event under CD Bob Miller DARTS Because heavy schedule es pecially among clubs supporting FAI eliminations LSF Tournament will one-site contest again year San Francisco general area Contest Director Kirby Parker LSF/721 going take blame year Details become available October 1975 issue Model Aviation near solution tow-line breakage described proposed Greater Detroit Lansing fliers month Chet Tuthill Coffee Airfoil ers has sent us drawings better mousetrap Jim Robinsons article follows Answer Towline Breakage problem plagues RC soaring community problem towline breakage forces contest director rule favor re-flight contest ant though knows own mind contestant involved will routinely the contest will con sistently break line worries other contestants line breakage oc curs because follow launch line broke afraid weakened line Also line breakage always seems occur wrong time some times resulting rapid re-kitting model tow nearly always re sults few hairy moments pilot spasms during recovery answer will prevent line breakage will place cause defi nitely being fault line contestants will take decision making away CD because contestant will get automatic re-flight line breaks answer lies maxi mum available line force set below floor-boards winch will get maxWANTED ideas happenings hints/kinks how-to sketches photos news etc Send columnist category concernedat address shown column photo idea printed Model Aviation will pay $5 contributor lines breaking strength contestant imum force available using usual pulsing action known around Tennessee Toe-Tap can ob tain desired tow regular manner Thus system functions winches up allowable maximum load fear breaking line sys tem will work winch 12-volt 6volt 2-in drum 4-in drum whatever system requires no modification winch can calibrated re quired very easily system devised Jim Robinson Coffee Airfoilers shown figure heart system mount winch placed mount held down weight winch can further restrained deemed neces sary platform supports winch attached base way pivot rod Rotation platform about rod restricted compression spring Rotation platform caused pull towline sensed switch cuts power solenoid pull reaches pre-set value pull does reach pre-set value nothing happens As pull exceeds pre-set value power winch cut pull reduced power restored cycle repeats cyclically required maintain applied force pre-set limit pre-set value below line breakage point Actual operation easier describe words amount allowable force easily varied screwing out nut spring rod holding fish scale equivalent noting pull exerted towline Try itit works youll like New Clubs Well through first year activities under wings Western Pennsylvania Conference Soaring Dave Burt Gene Shelkey Co have got Blairsville PA area off ground So youre interested joining RC Sailplane Club youre area contact either above Addresses Dave Burt 180 5 8th St Apt 4 Indiana PA 15701 Gene Shelkey 217 Euclid Ave Scottdale PA 15683 newly formed Mid-Ohio Soaring Society MOSS made up least 24 members Columbus area first effort club newsletter excel lent youre looking thermals club Mid-Ohio contact William F Duemmel 7766 Candlewood Lane Wor thington OH 43085 subject ad dresses National Soaring Society NSS $10 c/o Stanley Pfost 1481 Howell Branch Rd Winter Park FL 32789 League Silent Flight LSFFree PO Box 39068 Dept AM Chicago IL 60639 address Dan Pruss Box 490 Dept AM Plainfield IL 60544 88 Model Aviation FINE QUALITY KITS AND ACCESSORIES 1 72 SCALE PLASTIC KITS FLYING MODEL ACCESSORIES SPINNERS TS LS ENGINE KITS INEGUNS CYLINDERS L PANTS SCALE DRAWINGS PIES SEND 25 FOR COMPLETE CATALOG DEPT MA 4LLIAMS 181 PAWNEE STREET •mosMARCOS CA
