CONTROL LINE NAVY CARRIER Three-Line Control Systems September 1995 issue Model Aviation contained article John Brownlee describing construction operation alternative three-line control system alternative mean handle and-bellcrank design could used place commercially available three-line control systems currently manufactured marketed John Brodak commercial units have available 35 years various manufacturers derivatives same design originated Bob J Robert Smurthwaite Johns handle fine piece work apparently pleased results achieves using points out advantage low investment requires Another obvious advantage personal satisfaction using equipment youve built yourself advantages appeal you might want try Johns design Personally use commercial units dont recommend alternatives column explains some reasons recommending alternative systems Johns first alternative system describes handle D Chinery have other designs some complex some simpler November 1968 Aero Modeller Mick Reeves presented two handle four airplane alternatives Two offered completely independent throttle elevator does commercial system Two airplane units differing degrees interaction between two controls handle balanced unit much like commercial variety other bareminimum throttle controllittle third line attached fliers middle finger Both Reeves handles way used fliers middle finger operating throttle Johns design airplane unit calls Perfect Fox bellcranksI recommend use Perfect bellcranks fine normal control line applications Ive used years However Johns design others Ive seen puts twisting load bellcranks twisting movement has caused some Perfect bellcranks separate pivot bearings occurs flight result could range slight degradation control response loss model Another disadvantage two bellcrank system described John throttle elevator controls completely independent Because elevator bellcrank moves arc throttle control moved varying amount elevator movement whenever throttle moves properly rigged commercial three-line bellcrank offers complete independence two controls handle end few factors consider Because commercial units balanced no load throttle trigger As line tension varies no throttle control movement alternative handle tension throttle trigger varies directly overall line tension Throttle trigger movement also consideration Johns handle offers just over inch throttle-line movement drawn amount trigger movement corresponding inch line movement about 3/ inch Commercial units offer 11/2 inches line movement inch trigger displacement greater degree trigger movement offers precise control Another characteristic Brownlee design trigger finger bears unequal share loadand bears rather narrow surface load can little 15-20 pounds low-performance lightweight Profile model much 60 pounds high-performance three-pound Class II model Because trigger ring rotates throttle moves addition wear tear trigger finger possible commercial units trigger-ring movement linear Carrier modelers prefer fly 124 Model Aviation il Wilburs AD Skyraider GS Brodak kit An Fred Cronenwett found Douglas Skyshark turboprop electronic throttle controls SuperTigre 36 derivative Skyraider prototype Chino CA Merle Mohring built 39-inch-span de Havilland Sea Hornet Profile Carrier An OS 20 OS 15 electronic throttle control power model throttle trigger aft during high-speed flight segment elect use forward position high speed its possible rig handle airplane unit third-line control rests against stop handle during high-speed flight configuration relieves finger loadat least until want close throttle potential problem case airplane unit cant also against stop line loads wont balanced such case potential pull-test official rule control system has two lines bearing load model flight Such ruling occurred recent Northwest Regionals Another point worth mentioning concerns photos accompanied Johns article Im sure Perfect clips shown photos used demonstration still however instances modelers using old-style Perfect clips similar fishing connectors line connectors rules quite specific about load-carrying capacity required line clips old Perfect clips too weak anything lightest Profile models Single-piece clips separate clasp commercial clips rated strong enough Carrier applications available Perfect Pylon New Rules Cycle time read Executive Council chairmen Contest Boards will have met work out new schedule procedures submitting approving rules change proposals meeting still month away write column watch Focus Competition details Now time consider submitting rules change proposals youve thinking Take time talk out fellow modelers submit Hi Low Landings newsletter encourage discussion among Navy Carrier Society members thought discussion goes proposal easier present strong arguments favor adopting likely pass Roland Baltes Memorial second annual Roland Baltes Memonal Canier Contest will held March Whittier Narrows California Check Contest Calendar exact date Contest details can obtained Virgil Wilbur 9984 Cedaidale Drive Santa Fe Springs CA 90670 Fred Cronenwett 7352 Independence Avenue Apt 201 Canoga Park CA 91303 Virgil Fred working hard revive Carrier flying Southern California Whittier Narrows facility excellent Canier flying theres potential fine contest hope youll support bringing Carrier back part country 5EflTED C 3EOfiGIA AIRCRAFT MODELEFI5 ASSOC IIIC TU A~AL 80U TEABTEN XOEL BHOW FEB 17 1996 $500 ADMITTANCE TABLES $500 800 AI TIL 500 P19 /iued %/7/oJeAhow AIR rn WARNER RODENI GEORQZA PERRI GEORGiA N InterstateGRI-CENTER 1-75 CONTACT NORM DEPUTY 912-328-2689 OJIM DUCKWORTH 912-922-8663 Are yoir models structuraly challenged VACUUM BAG CSTs Pro Systems Extremely Reliable Pump Precise Vacuum Control Optional Multi-Bag Capability Choice Bag Kits Wing Skinning Kit Molded Parts Kit Deluxe Kit both Free Price List $5 Complete Product Guide L*EEE Building Todays Technology Composite Structures Technology P0 Box 642 Dept JL Tehachapi CA 93581 Order Toll Free 1-800-338-1278 Technical Support 805822-4162 JA e * 4. HERE WE ARE
Edition: Model Aviation - 1996/02
Page Numbers: 124, 125
CONTROL LINE NAVY CARRIER Three-Line Control Systems September 1995 issue Model Aviation contained article John Brownlee describing construction operation alternative three-line control system alternative mean handle and-bellcrank design could used place commercially available three-line control systems currently manufactured marketed John Brodak commercial units have available 35 years various manufacturers derivatives same design originated Bob J Robert Smurthwaite Johns handle fine piece work apparently pleased results achieves using points out advantage low investment requires Another obvious advantage personal satisfaction using equipment youve built yourself advantages appeal you might want try Johns design Personally use commercial units dont recommend alternatives column explains some reasons recommending alternative systems Johns first alternative system describes handle D Chinery have other designs some complex some simpler November 1968 Aero Modeller Mick Reeves presented two handle four airplane alternatives Two offered completely independent throttle elevator does commercial system Two airplane units differing degrees interaction between two controls handle balanced unit much like commercial variety other bareminimum throttle controllittle third line attached fliers middle finger Both Reeves handles way used fliers middle finger operating throttle Johns design airplane unit calls Perfect Fox bellcranksI recommend use Perfect bellcranks fine normal control line applications Ive used years However Johns design others Ive seen puts twisting load bellcranks twisting movement has caused some Perfect bellcranks separate pivot bearings occurs flight result could range slight degradation control response loss model Another disadvantage two bellcrank system described John throttle elevator controls completely independent Because elevator bellcrank moves arc throttle control moved varying amount elevator movement whenever throttle moves properly rigged commercial three-line bellcrank offers complete independence two controls handle end few factors consider Because commercial units balanced no load throttle trigger As line tension varies no throttle control movement alternative handle tension throttle trigger varies directly overall line tension Throttle trigger movement also consideration Johns handle offers just over inch throttle-line movement drawn amount trigger movement corresponding inch line movement about 3/ inch Commercial units offer 11/2 inches line movement inch trigger displacement greater degree trigger movement offers precise control Another characteristic Brownlee design trigger finger bears unequal share loadand bears rather narrow surface load can little 15-20 pounds low-performance lightweight Profile model much 60 pounds high-performance three-pound Class II model Because trigger ring rotates throttle moves addition wear tear trigger finger possible commercial units trigger-ring movement linear Carrier modelers prefer fly 124 Model Aviation il Wilburs AD Skyraider GS Brodak kit An Fred Cronenwett found Douglas Skyshark turboprop electronic throttle controls SuperTigre 36 derivative Skyraider prototype Chino CA Merle Mohring built 39-inch-span de Havilland Sea Hornet Profile Carrier An OS 20 OS 15 electronic throttle control power model throttle trigger aft during high-speed flight segment elect use forward position high speed its possible rig handle airplane unit third-line control rests against stop handle during high-speed flight configuration relieves finger loadat least until want close throttle potential problem case airplane unit cant also against stop line loads wont balanced such case potential pull-test official rule control system has two lines bearing load model flight Such ruling occurred recent Northwest Regionals Another point worth mentioning concerns photos accompanied Johns article Im sure Perfect clips shown photos used demonstration still however instances modelers using old-style Perfect clips similar fishing connectors line connectors rules quite specific about load-carrying capacity required line clips old Perfect clips too weak anything lightest Profile models Single-piece clips separate clasp commercial clips rated strong enough Carrier applications available Perfect Pylon New Rules Cycle time read Executive Council chairmen Contest Boards will have met work out new schedule procedures submitting approving rules change proposals meeting still month away write column watch Focus Competition details Now time consider submitting rules change proposals youve thinking Take time talk out fellow modelers submit Hi Low Landings newsletter encourage discussion among Navy Carrier Society members thought discussion goes proposal easier present strong arguments favor adopting likely pass Roland Baltes Memorial second annual Roland Baltes Memonal Canier Contest will held March Whittier Narrows California Check Contest Calendar exact date Contest details can obtained Virgil Wilbur 9984 Cedaidale Drive Santa Fe Springs CA 90670 Fred Cronenwett 7352 Independence Avenue Apt 201 Canoga Park CA 91303 Virgil Fred working hard revive Carrier flying Southern California Whittier Narrows facility excellent Canier flying theres potential fine contest hope youll support bringing Carrier back part country 5EflTED C 3EOfiGIA AIRCRAFT MODELEFI5 ASSOC IIIC TU A~AL 80U TEABTEN XOEL BHOW FEB 17 1996 $500 ADMITTANCE TABLES $500 800 AI TIL 500 P19 /iued %/7/oJeAhow AIR rn WARNER RODENI GEORQZA PERRI GEORGiA N InterstateGRI-CENTER 1-75 CONTACT NORM DEPUTY 912-328-2689 OJIM DUCKWORTH 912-922-8663 Are yoir models structuraly challenged VACUUM BAG CSTs Pro Systems Extremely Reliable Pump Precise Vacuum Control Optional Multi-Bag Capability Choice Bag Kits Wing Skinning Kit Molded Parts Kit Deluxe Kit both Free Price List $5 Complete Product Guide L*EEE Building Todays Technology Composite Structures Technology P0 Box 642 Dept JL Tehachapi CA 93581 Order Toll Free 1-800-338-1278 Technical Support 805822-4162 JA e * 4. HERE WE ARE