CONTROL LINE SCALE 11111 ENGINE COOLING PROBLEMS can cosfly recent Orbiting Eagles Greater Omaha club newsletter member George Lieb noted improper engine cowling can cause poor engine runs some cases irreparable engine damage problem improper cooling overheating engines related problems thought much average sport modeler great concern Scale modeler Most Scale modelers work toward fully enclosing engine effort give model best possible Scale appearance George noted engine cowlings must have proper openings air enter leave Because air expands heated engine exit should larger entrance opening Also air should forced flow over engines cooling fins stay back engine before exiting cowling properly designed cowl will allow engine run just cool fully exposed engine Consecutive flights will overheat properly cooled engine However cowled engines may overheat run ground too long overheating due loss rammed air created model flight Another possible problem tightly cowled engine lack air engine air intake air opening should always larger engines venturi rear-intake engines frontintake engines air cannot flow directly air opening venturi opening should least twice size venturi opening An easy way check intake openings large enough run engine top speed cowling removed install cowling run engine again needle valve setting needs changed cowling restricting flow air engine constructing Scale model engine completely enclosed builder ADDITIONAL COOLING VIA DUMMY EXHAUST ERVO Engine overheating common Scale models proper airflow averts should take opportunity provide much engine cowl venting possible Scale subjects still great favor fighters WW II used radial-type engines engine compartments featured cowl cooling flaps build model fighters should use cowl flap feature provide proper engine cooling Cowl flapssometimes called cooling gillscan installed permanently open position can made adjustable use multichannel electronic control systembecoming popular timeallows cowl flaps operated independently does provide proper cooling counts operational feature model addition dummy exhaust stacks can made useful cooling additions opeinng stacks engine compartment Whether Scale builder average sport flier pays concerned 118 Model Aviation Logans FE2b won FAI F4B 3000 points proving dont need complex multiengine model win Grant Hiestands Sig Skywalker has quiet clean Electric power Astro 90 Steve Davis proudly displays first attempt Scale modeling Grumman Bearcat uses 0S 26 four-stroke Gokiberg ultimate Cowi/ Wheel Pants Wing Sldnning Video Desaflo II Wing Span 685 WelgiW 85-95 Its WinaAea840sch 120 Wing Span 68 WeIgit 85-95 Wing Span 66 WeIght 85-90 lbs Wing Aba XX sq k-i En0ne 120 Wing Area 940 sq h Enie 120 CoklbergExba 300 Co elPant8 Please send $100 Cataiog 615 455-0735 1111 11111 1 215 Bi Snns Avenue ahoma TN 37388 about engine overheating couple hours workbench ensuring engine will have adequate cooling can save hours aggravation flying fieldyou might also save engine Book Review Ironworks Teriy Treadwell story Grumman Aircraft Corporation amazingly strong dependable planes produced book covers Grumman company its inception 1930 present-day activities countrys space programs author begins FF- 1 F2F-1 biplanes first long series planes used US Navy Among famous Grumman planes featured F4F Wildcat F6F Hellcat TBF/TBM Avenger AF-2 Guardian F9F Panther Cougar S-2 Tracker AG-Cat specially designed biplane crop dusting jets such A-6 Intruder F-14 Tomcat Grumman X-29 FSW Forward Swept Wing experimental single-seat fighter book has excellent photos history technical data includes cutaway drawings of planes book does feature three-views information presented good reading might convince build model Grummans great aircraft Ironworks available local book stores such Barnes Noble also available through Zenith Books PO Box 1 Osceola WI 54020 Cat # 1 15630AE hardbound 176-page book designated ISBN 0 87938 488 3 8-inches x 12inches has approximately 200 illustrations cost less $15 New club note Royce Fine Tampa florida informed new control line club Tampa Line flyers Fifteen interested enthusiastic members first meeting November 1993 several founding members interested both CL Scale Carrier events club has applied AMA Charter Club status will putting out newsletter process looking appropriate flying site Anyone Tampa surrounding area interested participating new CL clubs activities should contact Tampa Line flyers 4319 Tyson Ave Tampa FL 33611 Good luck new endeavor hope hear about club Scale activities future National competition photos As probably know Stan Alexander NASA newsletter editor covered CL Scale events 1993 AMA Nats write-up events appeared December 1993 issue MA Stan recently sent large batch photographs covering models December issue would like thank Stan will try use various columns throughout year will give opportunity show readers what flown national competition well competitors stand behind handle wont writing much about models since Stan did excellent job have started month Californian Grant Hiestands electric powered 1A-Scale Skywalker placed first precision event other model RAE FE 2b Bill Logan London Ontario Canada placed first F4B Event FAT Scale Please send ideas notices upcoming CL Scale events contest reports especially photos CL Scale activity address very top column Model Aviation q 0 300 Wing Span 62 Weight 95-100 lbs Wing Area 965sq Engine 60 JekyLL Wing Span 70 WeIgh 85-95 lbs Wing Area 860 sq 1 Engine 120 FAX 615 455-0677
