C_________ raiding rubber id motor 4 Put aflow extra long have done Old Time mind reauze Indiana Aer calling tell eir first annua would cx e readership couple o4 S D June 25th46242 Patterson Air usual event OT Hani erson ber seconds speed laps Phil Cartier will keep statistics event Id like publish results should make interesting comparison model performance Under theres gotta better way column local group has tried various ways running combat events latest system does away knock-out pyramid gives flier four matches point total four matches de termines winner slow number wins determines winner Fast flyoffs necessary future contests well try penalty points down time minus point second ground dur ing match two collision rule contestants will put out volved two mid-airs end match Slow Combat system works well allows use FAI type one-minute match winner first meet run way accumulated six cuts almost five minutes air time final match day good comparison pre-glow days England goal have fly 20 minutes combat instill dread fear hitting other guys plane l/2A Combatanother National event Ben Sasnett coordinating efforts make /2A Combat official National event would like share informa tion techniques voice opin ion write Ben 1443 McKinley Ave Escondido CA 92027 Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Old Timer/Haught continued page 54 Another interesting sidelight CIA contest use graduated en gine runs 100% original ignition en gines 75% conversions 60% glow engines 100% figure set CD site depending prevailing con ditions Looks local clubs wont let lack ignition engine keep enjoying Old Timer flight Up Rubber Power seems think Old Timer terms gas jobs forgetting began rubber meets including 77 SAM Champs Las Vegas offer oldtimer rubber power disappointed lack entries compared other events As mentioned before fine old designs around neednt build Lanzo Korda Wake competitive modern modelers have turned away rubber-powered events saying Pirelli nothing Actually industry has respon ded reasonably good rubber avail able again Some evaluators willing compare some average batches extinct Pirelli An advantage GRISH AIRCRAFT TYPE PROPELLERS Made hardwood fully carved true helical pitch airfoil ready sanding ALL SIZES IN18$700 6 8 & 10 PITCH20800 ND221000 241300 3/8 BORE AT YOUR DEALER 304 354 504 654 854 $1 $150 OT rubber dont necessarily have have best rubber because no restrictions amount used Within reasonable weight ranges can simply add few strands make up lack power experience old standard brown rubber its use band wings gas ships really cant say good old rubber have considerable experience Pirelli Some say better others say poorer Rubber actually wel come change pace Some reference made old pub lications regarding use braided mo tors Modelers discovered early point shorter motors just long enough reach prop shaft rear motor peg provided initial burst power relatively short duration run Longer motors 1 2 times dis tance between hook peg would put out longer run problem motor ran down ex tra length prone bunch up either nose tail upsetting CG course glide angle Braiding motor used method making long motor fit properly between hook peg slack Friend flying buddy John Morrell Los Angeles movie photographer showed very interesting method braiding motors First make single double necessary loop desired rubber Anchor end stretch out 1 mes slack length Put 100 winds Now relieving stretch grasp motor center its stretched length fold end winder back anchor point Remove winder attach end anchor point Hook winder folded point crank 50 turns moving towards anchor point until wound motor exact length between hook peg model Hook wound motor prop nose block assem bly Allow motor unwind driving prop hold nose block proper distance motor will automati cally self-braid itself proper length will remain braided condition allowing installation model system will work size models P-nut up few experimental braids youll have hang Event Month Fuel Allotment Antique basic event name would imply flown specified en gine run just done interim period between no limit engine runs timed engine runs still practiced ever restrict ing limits Fuel official flight is sued contest director after weighing model calculating fuel ration according formula /e oz per pound weight up maximum 7/ oz Most modelers make economy run July 1978 95 USE TO PROPEL AIR CREATE THRUST 3E PROPELLED BY AT DISCRETION 01 fioirniddi PROPELLERS ALL GRISH PROPELLERS ARE ENGINEERED TO TRUE HELICAL PITCH AND AIRFOIL FOR EFFICIENCY 2 Blade Tractor 545%35%-4 6-3 6-4 747-67-8 8-48-68-8 9-49-69-7 9-810-410-6 11-411-611-8 12-412-512-6 AT YOUR DEALER mmm ROS G KI5N ST JOHN INDIANA URCHASEI 2 Blade Pusher 5-3 5/-4 6-36-4354 8-6854 9-610-6$1 BLADE 3 BladeTractor 5-3 6-36-4504o 3 BladePusher 6-3Metallic Aluminum Color Made polyesterw boll color r7-67-8Si -8-68-8 5125 9-610-610-4 $150 Pusher 10-6$150 forcettoicly shey should hoow products ore worth because little historic researching fot Sowetiwes other plors ore prettier hut bosic ourheoticity detoiliog oed prototype inforwetioc glue rho t coonts whse its eufhertis wodeliog youre ofter Theres o world costly diPerenee wheo hcy CDs ecee otseoerol tiwen rho price hot os serious wodelerseod eciosion persoocol soy Nore hut CDs gioe yoc oppeoroncethe feel oldtiwers sowehew hoild thew FOR YOUR HOBBY AT R R M N M SENO St OR CATALOG SE 2 YRS SUBS St ADO tOe 1100 PLANS _________________________________ AVAILABLE 1931 Gee Bee Super Sportster 1 eeSle General Arrange ment Drawing Catalog 25c W T Bill Given MODERNISTIC MODELS PO BOX 6974 ALBUG NM 87197 adjusting engines barely ac complish required ROG maintain shallow cruising climb Engine runs over ten minutes common often attain good altitude thermal exten sion flight As can imagine large site minimal drift required event qualify event model de sign must 1938 earlier Wing span must six feet greater orig nal ignition engines allowed clas sic old birds cruising slowly overhead make excellent targets camera buff takeoff runs long slow few feet altitude gained per circle can manage several good shots Clarence Haught Rt 5 Box 16 Coeur dAlene ID 83614 FF Indoor/Tenny continued page 55 hooked twiceonce winder rubber can hooked prop shaft once unhook torquemeter easy enough hook meter prop re-check torque much lost moving motor torquemeter models rear hook Use 0 Ring purist stand point 0 ring rubber synthetic circle rubbera doughnut shape used gasket between metal fittings pressure vacuum systems indoor models 0 ring something slipped meter allows mo tor unhooked removing turns past 0 rings have made small diameter music wire bent circle hooked itself re cently either plastic rings real 0 ringsvery tiny ones-have used Photo shows plastic 0 ring motor Photo 2 shows rubber 0 ring same size motor Note rubber 0 ring fits very closely motor can advantage Because 0 ring fits snugly helps hold motor rear hook motor unwinds completely plastic 0 rings made slicing off end piece Nyrod particular brand pushrod radio con trol models After rings cut sharp edges removed boiling water 0 rings very light flier should experimentally test strength 0 rings winding motors destruction model rubber 0 rings available Ron Plotzke Aorolite 36659 Ledgestone Mt Clem ens Ml 48043 Ray Harlan 15 Happy Hollow Rd. Wayland MA 01778 As mentioned before rubber 0 rings fit rather snugly rubber motor enough difficult get 0 ring slide rubber answer shown Photos 3 4 small diameter wire insect mounting pin shown bent double pushed through 0 ring 0 ring pushed over rubber end rubber pulled through Whether use extra 0 ring question since no doubt mind about using least After experience using 0 rings difficult accept inconvenience uncertainty involved having least 0 ring factors weighing decision model size ceiling height weight 0 ring some cases factors like fail ing eyesight poor lighting contest site enter picture simply easier see hook up 0 ring particularly plastic ones weight 0 ring typically less 0005 oz certainly minor factor FAI Stick model must weigh 0354 oz espe cially since precise control models trajectory possible other factors unchanged altitude model attains directly proportional launch torque too small model such ROG 0 ring higher proportion models fly ing weight loss few turns tiny rubber has almost negligible effect launch torque heavier indoor model power proportionally needs given model size leads problems bunching rubber knots rubbing fuselage usually effects detrimental long flights Pennyplane models com pound problem having high required weight requiring very short fuselages Although rubber model ap proaches its maximum duration rub ber weight approaches 1 s air plane weight short Pennyplane fuse lage poses such rubber handling problems few fliers manage use 80% much rubber weight airplane weight Thus rubber handling problems can solved Pennyplane times bound go up 0 rings tend help pre vent rubber bunching prep no has reported 0 ring really strong enough rubber weight already short improvement helps should o rings Pennyplane Bud Tennv Box 545 Richardson TX 75080 FF Duration/Meuser continued page 53 used several models An added feature fuse easy light check compared uusual tail mount use aluminum tubing curved parts line path plastic tubing could used Metal tubing will easily kink bent sharply use end finger thumb form bend slowly carefully radius inch less can achieved method 3/32 aluminum tubing Metal tubes should flared out bit end line will cut Twenty-pound test Da cron line works well line Other sizes types can used front tube must placed far enough rearward stab will pop up desired angle Check before mounting front hook will catch tube act limiter bend hooks out pins plenty strong enough gas model piece 1/32 ply glued around stab hole adds needed strength point rear wire will slide through hole stab placed parallel string sketch shows typical set-up large model tail-mounted fuse beyond convenient reach flier makes launching two man job small light models CG shift due burn ing fuse can change glide pattern sig nificantly aside fire hazard tail-mounted fuse makes little sense Clarences idea mounting fuse top seems like winner However internal dethermalizer strings plastic tubing running clear inlet outlet often preferred over alu minum tubing original string gets pulled out can easily replaced Twenty-pound woven Dacron Nylon line can pushed through end bends gentle monofilament line can pushed through series se vere bends extremely lightweight models weight plastic tubing might factor external DT string seems like best bet Plastic tubing selected purpose well proved can obtained NFFS Supplies 9525 Achates Cl Sacra mento CA 95826 send SASE complete price list Top following incident will undoubtedly nominated Best Grandstand Act 1978 took place recent Max-Men FAI An96 Model Aviation
Edition: Model Aviation - 1978/07
Page Numbers: 54, 95, 96
C_________ raiding rubber id motor 4 Put aflow extra long have done Old Time mind reauze Indiana Aer calling tell eir first annua would cx e readership couple o4 S D June 25th46242 Patterson Air usual event OT Hani erson ber seconds speed laps Phil Cartier will keep statistics event Id like publish results should make interesting comparison model performance Under theres gotta better way column local group has tried various ways running combat events latest system does away knock-out pyramid gives flier four matches point total four matches de termines winner slow number wins determines winner Fast flyoffs necessary future contests well try penalty points down time minus point second ground dur ing match two collision rule contestants will put out volved two mid-airs end match Slow Combat system works well allows use FAI type one-minute match winner first meet run way accumulated six cuts almost five minutes air time final match day good comparison pre-glow days England goal have fly 20 minutes combat instill dread fear hitting other guys plane l/2A Combatanother National event Ben Sasnett coordinating efforts make /2A Combat official National event would like share informa tion techniques voice opin ion write Ben 1443 McKinley Ave Escondido CA 92027 Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Old Timer/Haught continued page 54 Another interesting sidelight CIA contest use graduated en gine runs 100% original ignition en gines 75% conversions 60% glow engines 100% figure set CD site depending prevailing con ditions Looks local clubs wont let lack ignition engine keep enjoying Old Timer flight Up Rubber Power seems think Old Timer terms gas jobs forgetting began rubber meets including 77 SAM Champs Las Vegas offer oldtimer rubber power disappointed lack entries compared other events As mentioned before fine old designs around neednt build Lanzo Korda Wake competitive modern modelers have turned away rubber-powered events saying Pirelli nothing Actually industry has respon ded reasonably good rubber avail able again Some evaluators willing compare some average batches extinct Pirelli An advantage GRISH AIRCRAFT TYPE PROPELLERS Made hardwood fully carved true helical pitch airfoil ready sanding ALL SIZES IN18$700 6 8 & 10 PITCH20800 ND221000 241300 3/8 BORE AT YOUR DEALER 304 354 504 654 854 $1 $150 OT rubber dont necessarily have have best rubber because no restrictions amount used Within reasonable weight ranges can simply add few strands make up lack power experience old standard brown rubber its use band wings gas ships really cant say good old rubber have considerable experience Pirelli Some say better others say poorer Rubber actually wel come change pace Some reference made old pub lications regarding use braided mo tors Modelers discovered early point shorter motors just long enough reach prop shaft rear motor peg provided initial burst power relatively short duration run Longer motors 1 2 times dis tance between hook peg would put out longer run problem motor ran down ex tra length prone bunch up either nose tail upsetting CG course glide angle Braiding motor used method making long motor fit properly between hook peg slack Friend flying buddy John Morrell Los Angeles movie photographer showed very interesting method braiding motors First make single double necessary loop desired rubber Anchor end stretch out 1 mes slack length Put 100 winds Now relieving stretch grasp motor center its stretched length fold end winder back anchor point Remove winder attach end anchor point Hook winder folded point crank 50 turns moving towards anchor point until wound motor exact length between hook peg model Hook wound motor prop nose block assem bly Allow motor unwind driving prop hold nose block proper distance motor will automati cally self-braid itself proper length will remain braided condition allowing installation model system will work size models P-nut up few experimental braids youll have hang Event Month Fuel Allotment Antique basic event name would imply flown specified en gine run just done interim period between no limit engine runs timed engine runs still practiced ever restrict ing limits Fuel official flight is sued contest director after weighing model calculating fuel ration according formula /e oz per pound weight up maximum 7/ oz Most modelers make economy run July 1978 95 USE TO PROPEL AIR CREATE THRUST 3E PROPELLED BY AT DISCRETION 01 fioirniddi PROPELLERS ALL GRISH PROPELLERS ARE ENGINEERED TO TRUE HELICAL PITCH AND AIRFOIL FOR EFFICIENCY 2 Blade Tractor 545%35%-4 6-3 6-4 747-67-8 8-48-68-8 9-49-69-7 9-810-410-6 11-411-611-8 12-412-512-6 AT YOUR DEALER mmm ROS G KI5N ST JOHN INDIANA URCHASEI 2 Blade Pusher 5-3 5/-4 6-36-4354 8-6854 9-610-6$1 BLADE 3 BladeTractor 5-3 6-36-4504o 3 BladePusher 6-3Metallic Aluminum Color Made polyesterw boll color r7-67-8Si -8-68-8 5125 9-610-610-4 $150 Pusher 10-6$150 forcettoicly shey should hoow products ore worth because little historic researching fot Sowetiwes other plors ore prettier hut bosic ourheoticity detoiliog oed prototype inforwetioc glue rho t coonts whse its eufhertis wodeliog youre ofter Theres o world costly diPerenee wheo hcy CDs ecee otseoerol tiwen rho price hot os serious wodelerseod eciosion persoocol soy Nore hut CDs gioe yoc oppeoroncethe feel oldtiwers sowehew hoild thew FOR YOUR HOBBY AT R R M N M SENO St OR CATALOG SE 2 YRS SUBS St ADO tOe 1100 PLANS _________________________________ AVAILABLE 1931 Gee Bee Super Sportster 1 eeSle General Arrange ment Drawing Catalog 25c W T Bill Given MODERNISTIC MODELS PO BOX 6974 ALBUG NM 87197 adjusting engines barely ac complish required ROG maintain shallow cruising climb Engine runs over ten minutes common often attain good altitude thermal exten sion flight As can imagine large site minimal drift required event qualify event model de sign must 1938 earlier Wing span must six feet greater orig nal ignition engines allowed clas sic old birds cruising slowly overhead make excellent targets camera buff takeoff runs long slow few feet altitude gained per circle can manage several good shots Clarence Haught Rt 5 Box 16 Coeur dAlene ID 83614 FF Indoor/Tenny continued page 55 hooked twiceonce winder rubber can hooked prop shaft once unhook torquemeter easy enough hook meter prop re-check torque much lost moving motor torquemeter models rear hook Use 0 Ring purist stand point 0 ring rubber synthetic circle rubbera doughnut shape used gasket between metal fittings pressure vacuum systems indoor models 0 ring something slipped meter allows mo tor unhooked removing turns past 0 rings have made small diameter music wire bent circle hooked itself re cently either plastic rings real 0 ringsvery tiny ones-have used Photo shows plastic 0 ring motor Photo 2 shows rubber 0 ring same size motor Note rubber 0 ring fits very closely motor can advantage Because 0 ring fits snugly helps hold motor rear hook motor unwinds completely plastic 0 rings made slicing off end piece Nyrod particular brand pushrod radio con trol models After rings cut sharp edges removed boiling water 0 rings very light flier should experimentally test strength 0 rings winding motors destruction model rubber 0 rings available Ron Plotzke Aorolite 36659 Ledgestone Mt Clem ens Ml 48043 Ray Harlan 15 Happy Hollow Rd. Wayland MA 01778 As mentioned before rubber 0 rings fit rather snugly rubber motor enough difficult get 0 ring slide rubber answer shown Photos 3 4 small diameter wire insect mounting pin shown bent double pushed through 0 ring 0 ring pushed over rubber end rubber pulled through Whether use extra 0 ring question since no doubt mind about using least After experience using 0 rings difficult accept inconvenience uncertainty involved having least 0 ring factors weighing decision model size ceiling height weight 0 ring some cases factors like fail ing eyesight poor lighting contest site enter picture simply easier see hook up 0 ring particularly plastic ones weight 0 ring typically less 0005 oz certainly minor factor FAI Stick model must weigh 0354 oz espe cially since precise control models trajectory possible other factors unchanged altitude model attains directly proportional launch torque too small model such ROG 0 ring higher proportion models fly ing weight loss few turns tiny rubber has almost negligible effect launch torque heavier indoor model power proportionally needs given model size leads problems bunching rubber knots rubbing fuselage usually effects detrimental long flights Pennyplane models com pound problem having high required weight requiring very short fuselages Although rubber model ap proaches its maximum duration rub ber weight approaches 1 s air plane weight short Pennyplane fuse lage poses such rubber handling problems few fliers manage use 80% much rubber weight airplane weight Thus rubber handling problems can solved Pennyplane times bound go up 0 rings tend help pre vent rubber bunching prep no has reported 0 ring really strong enough rubber weight already short improvement helps should o rings Pennyplane Bud Tennv Box 545 Richardson TX 75080 FF Duration/Meuser continued page 53 used several models An added feature fuse easy light check compared uusual tail mount use aluminum tubing curved parts line path plastic tubing could used Metal tubing will easily kink bent sharply use end finger thumb form bend slowly carefully radius inch less can achieved method 3/32 aluminum tubing Metal tubes should flared out bit end line will cut Twenty-pound test Da cron line works well line Other sizes types can used front tube must placed far enough rearward stab will pop up desired angle Check before mounting front hook will catch tube act limiter bend hooks out pins plenty strong enough gas model piece 1/32 ply glued around stab hole adds needed strength point rear wire will slide through hole stab placed parallel string sketch shows typical set-up large model tail-mounted fuse beyond convenient reach flier makes launching two man job small light models CG shift due burn ing fuse can change glide pattern sig nificantly aside fire hazard tail-mounted fuse makes little sense Clarences idea mounting fuse top seems like winner However internal dethermalizer strings plastic tubing running clear inlet outlet often preferred over alu minum tubing original string gets pulled out can easily replaced Twenty-pound woven Dacron Nylon line can pushed through end bends gentle monofilament line can pushed through series se vere bends extremely lightweight models weight plastic tubing might factor external DT string seems like best bet Plastic tubing selected purpose well proved can obtained NFFS Supplies 9525 Achates Cl Sacra mento CA 95826 send SASE complete price list Top following incident will undoubtedly nominated Best Grandstand Act 1978 took place recent Max-Men FAI An96 Model Aviation
Edition: Model Aviation - 1978/07
Page Numbers: 54, 95, 96
C_________ raiding rubber id motor 4 Put aflow extra long have done Old Time mind reauze Indiana Aer calling tell eir first annua would cx e readership couple o4 S D June 25th46242 Patterson Air usual event OT Hani erson ber seconds speed laps Phil Cartier will keep statistics event Id like publish results should make interesting comparison model performance Under theres gotta better way column local group has tried various ways running combat events latest system does away knock-out pyramid gives flier four matches point total four matches de termines winner slow number wins determines winner Fast flyoffs necessary future contests well try penalty points down time minus point second ground dur ing match two collision rule contestants will put out volved two mid-airs end match Slow Combat system works well allows use FAI type one-minute match winner first meet run way accumulated six cuts almost five minutes air time final match day good comparison pre-glow days England goal have fly 20 minutes combat instill dread fear hitting other guys plane l/2A Combatanother National event Ben Sasnett coordinating efforts make /2A Combat official National event would like share informa tion techniques voice opin ion write Ben 1443 McKinley Ave Escondido CA 92027 Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Old Timer/Haught continued page 54 Another interesting sidelight CIA contest use graduated en gine runs 100% original ignition en gines 75% conversions 60% glow engines 100% figure set CD site depending prevailing con ditions Looks local clubs wont let lack ignition engine keep enjoying Old Timer flight Up Rubber Power seems think Old Timer terms gas jobs forgetting began rubber meets including 77 SAM Champs Las Vegas offer oldtimer rubber power disappointed lack entries compared other events As mentioned before fine old designs around neednt build Lanzo Korda Wake competitive modern modelers have turned away rubber-powered events saying Pirelli nothing Actually industry has respon ded reasonably good rubber avail able again Some evaluators willing compare some average batches extinct Pirelli An advantage GRISH AIRCRAFT TYPE PROPELLERS Made hardwood fully carved true helical pitch airfoil ready sanding ALL SIZES IN18$700 6 8 & 10 PITCH20800 ND221000 241300 3/8 BORE AT YOUR DEALER 304 354 504 654 854 $1 $150 OT rubber dont necessarily have have best rubber because no restrictions amount used Within reasonable weight ranges can simply add few strands make up lack power experience old standard brown rubber its use band wings gas ships really cant say good old rubber have considerable experience Pirelli Some say better others say poorer Rubber actually wel come change pace Some reference made old pub lications regarding use braided mo tors Modelers discovered early point shorter motors just long enough reach prop shaft rear motor peg provided initial burst power relatively short duration run Longer motors 1 2 times dis tance between hook peg would put out longer run problem motor ran down ex tra length prone bunch up either nose tail upsetting CG course glide angle Braiding motor used method making long motor fit properly between hook peg slack Friend flying buddy John Morrell Los Angeles movie photographer showed very interesting method braiding motors First make single double necessary loop desired rubber Anchor end stretch out 1 mes slack length Put 100 winds Now relieving stretch grasp motor center its stretched length fold end winder back anchor point Remove winder attach end anchor point Hook winder folded point crank 50 turns moving towards anchor point until wound motor exact length between hook peg model Hook wound motor prop nose block assem bly Allow motor unwind driving prop hold nose block proper distance motor will automati cally self-braid itself proper length will remain braided condition allowing installation model system will work size models P-nut up few experimental braids youll have hang Event Month Fuel Allotment Antique basic event name would imply flown specified en gine run just done interim period between no limit engine runs timed engine runs still practiced ever restrict ing limits Fuel official flight is sued contest director after weighing model calculating fuel ration according formula /e oz per pound weight up maximum 7/ oz Most modelers make economy run July 1978 95 USE TO PROPEL AIR CREATE THRUST 3E PROPELLED BY AT DISCRETION 01 fioirniddi PROPELLERS ALL GRISH PROPELLERS ARE ENGINEERED TO TRUE HELICAL PITCH AND AIRFOIL FOR EFFICIENCY 2 Blade Tractor 545%35%-4 6-3 6-4 747-67-8 8-48-68-8 9-49-69-7 9-810-410-6 11-411-611-8 12-412-512-6 AT YOUR DEALER mmm ROS G KI5N ST JOHN INDIANA URCHASEI 2 Blade Pusher 5-3 5/-4 6-36-4354 8-6854 9-610-6$1 BLADE 3 BladeTractor 5-3 6-36-4504o 3 BladePusher 6-3Metallic Aluminum Color Made polyesterw boll color r7-67-8Si -8-68-8 5125 9-610-610-4 $150 Pusher 10-6$150 forcettoicly shey should hoow products ore worth because little historic researching fot Sowetiwes other plors ore prettier hut bosic ourheoticity detoiliog oed prototype inforwetioc glue rho t coonts whse its eufhertis wodeliog youre ofter Theres o world costly diPerenee wheo hcy CDs ecee otseoerol tiwen rho price hot os serious wodelerseod eciosion persoocol soy Nore hut CDs gioe yoc oppeoroncethe feel oldtiwers sowehew hoild thew FOR YOUR HOBBY AT R R M N M SENO St OR CATALOG SE 2 YRS SUBS St ADO tOe 1100 PLANS _________________________________ AVAILABLE 1931 Gee Bee Super Sportster 1 eeSle General Arrange ment Drawing Catalog 25c W T Bill Given MODERNISTIC MODELS PO BOX 6974 ALBUG NM 87197 adjusting engines barely ac complish required ROG maintain shallow cruising climb Engine runs over ten minutes common often attain good altitude thermal exten sion flight As can imagine large site minimal drift required event qualify event model de sign must 1938 earlier Wing span must six feet greater orig nal ignition engines allowed clas sic old birds cruising slowly overhead make excellent targets camera buff takeoff runs long slow few feet altitude gained per circle can manage several good shots Clarence Haught Rt 5 Box 16 Coeur dAlene ID 83614 FF Indoor/Tenny continued page 55 hooked twiceonce winder rubber can hooked prop shaft once unhook torquemeter easy enough hook meter prop re-check torque much lost moving motor torquemeter models rear hook Use 0 Ring purist stand point 0 ring rubber synthetic circle rubbera doughnut shape used gasket between metal fittings pressure vacuum systems indoor models 0 ring something slipped meter allows mo tor unhooked removing turns past 0 rings have made small diameter music wire bent circle hooked itself re cently either plastic rings real 0 ringsvery tiny ones-have used Photo shows plastic 0 ring motor Photo 2 shows rubber 0 ring same size motor Note rubber 0 ring fits very closely motor can advantage Because 0 ring fits snugly helps hold motor rear hook motor unwinds completely plastic 0 rings made slicing off end piece Nyrod particular brand pushrod radio con trol models After rings cut sharp edges removed boiling water 0 rings very light flier should experimentally test strength 0 rings winding motors destruction model rubber 0 rings available Ron Plotzke Aorolite 36659 Ledgestone Mt Clem ens Ml 48043 Ray Harlan 15 Happy Hollow Rd. Wayland MA 01778 As mentioned before rubber 0 rings fit rather snugly rubber motor enough difficult get 0 ring slide rubber answer shown Photos 3 4 small diameter wire insect mounting pin shown bent double pushed through 0 ring 0 ring pushed over rubber end rubber pulled through Whether use extra 0 ring question since no doubt mind about using least After experience using 0 rings difficult accept inconvenience uncertainty involved having least 0 ring factors weighing decision model size ceiling height weight 0 ring some cases factors like fail ing eyesight poor lighting contest site enter picture simply easier see hook up 0 ring particularly plastic ones weight 0 ring typically less 0005 oz certainly minor factor FAI Stick model must weigh 0354 oz espe cially since precise control models trajectory possible other factors unchanged altitude model attains directly proportional launch torque too small model such ROG 0 ring higher proportion models fly ing weight loss few turns tiny rubber has almost negligible effect launch torque heavier indoor model power proportionally needs given model size leads problems bunching rubber knots rubbing fuselage usually effects detrimental long flights Pennyplane models com pound problem having high required weight requiring very short fuselages Although rubber model ap proaches its maximum duration rub ber weight approaches 1 s air plane weight short Pennyplane fuse lage poses such rubber handling problems few fliers manage use 80% much rubber weight airplane weight Thus rubber handling problems can solved Pennyplane times bound go up 0 rings tend help pre vent rubber bunching prep no has reported 0 ring really strong enough rubber weight already short improvement helps should o rings Pennyplane Bud Tennv Box 545 Richardson TX 75080 FF Duration/Meuser continued page 53 used several models An added feature fuse easy light check compared uusual tail mount use aluminum tubing curved parts line path plastic tubing could used Metal tubing will easily kink bent sharply use end finger thumb form bend slowly carefully radius inch less can achieved method 3/32 aluminum tubing Metal tubes should flared out bit end line will cut Twenty-pound test Da cron line works well line Other sizes types can used front tube must placed far enough rearward stab will pop up desired angle Check before mounting front hook will catch tube act limiter bend hooks out pins plenty strong enough gas model piece 1/32 ply glued around stab hole adds needed strength point rear wire will slide through hole stab placed parallel string sketch shows typical set-up large model tail-mounted fuse beyond convenient reach flier makes launching two man job small light models CG shift due burn ing fuse can change glide pattern sig nificantly aside fire hazard tail-mounted fuse makes little sense Clarences idea mounting fuse top seems like winner However internal dethermalizer strings plastic tubing running clear inlet outlet often preferred over alu minum tubing original string gets pulled out can easily replaced Twenty-pound woven Dacron Nylon line can pushed through end bends gentle monofilament line can pushed through series se vere bends extremely lightweight models weight plastic tubing might factor external DT string seems like best bet Plastic tubing selected purpose well proved can obtained NFFS Supplies 9525 Achates Cl Sacra mento CA 95826 send SASE complete price list Top following incident will undoubtedly nominated Best Grandstand Act 1978 took place recent Max-Men FAI An96 Model Aviation