Control Line: Combat

Combat 0 Charlie Johnson THE COMBAT WORLD challenged Sherwood Buckstaff couple months ago following issue MACA Newsletter torrent comment best lot follows writ ten Rich Brasher Redwood City Texan named Sherwood B Nats will compete hell have no chance Ill just dance kill him simplicity rest comments March 1977 issue MACA N/L fairness Sherwood Buckstaff must remind has won last two Nats Fast Combat events another Texan Dick Stubblefield won year before Ive seen lot comments about hav ing Nats out California Seems Easterners think closer us drive 2200 miles back come out least wont rain March AFB August should 90s bring along good wide-brim hat salt tablets some shims raise head engines Heres neat way make perfectly scaled copies relatively flat object like stab airfoil section etc Youll need access photo enlarger want print slide projector dont mind tracing Take picture favorite elliptical stab airfoil using black-andwhite film planning making prints color-slide film projecting Almost camera will Take care camera parallel object centered Using either enlarger projector possi ble obtain perfect reproductions original size desire Nemesis airfoil can reduced make /2A Nemesis made large enough used full-scale plane can take top shot model project onto blueprint paper special variety get full-size prints get dimensions photography bit helps get basic measurements designer since probably wont remember exact leadout location engine placement dozen other de tails Itll harder keep design secret now Guys like Brasber would pick up broken bits models keep wing falling hands copycats Ill bet thought ecology minded Something tells 35-sized ven turi Tigre X-15 looks bit large dont have machinist friend now solution could cut bit off bottom old suction venturi easiest cheapest method use epoxy Wrap masking tape around venturi after youve cleaned well dont forget cover bottom too youll need large quantities epoxy long-cure epoxies fuel-proof five-minute type OK field work After epoxy sets up remove tape drill hole down center Continued page 80 August1977 35 Eddie Weathermans lines hes No 73 became entangled around opponent himself motor hed flamed Out plane glided Eddie caught just before could hit opponent whos trying keep plane under control Circle marshall pit crews raced rescue Samuel pic Very sleek fast Rossi-powered ship Frank Sanders flown dazzling style newcomer Mark Clemens San Diego Johnson pic Nice design Bob Autry Only 20-oz weight conventional design amazinglittle crash resistance can remain airborne long 8 minutes bushing Tigre huge tank Johnson pic FLYING ACE Thats what you come over SC Modeler know what takes conquer skies soar high maneuver gracefully know because weve ourselves Thats big differ ence nt just sell service dio control modelers ourselves johnny-come-late lys either expertise goes back pioneering days radio control Look us need flying ace want Replacement parts kits radios advice help husiasts enthusiasts Send $1 new helicopter catalog parts list CL ScalelStott continued page 34 appropriate Contest Board Chairman 4 Each committee would consider rules changes affecting Scale category case Unified Rules changes affected categories would consider proposed rules 5 Voting committee rules changes would accordance cur rent Contest Board procedures 6 Results committees rules change considerations accepted appropriate Contest Board Chair man final unless committees find ings contrary rules compe tition category regarding safety con test administration 7 Each committee chairman would responsible final rules change wording updates rulebook above proposals deal action committees responsible Contest Board Chairman Board current Contest Board procedures doesnt seem would have gained anything Advisory Committees still puppet string 8 AMA would expected provide mailing services committee part contest boards activities Again would cost modelers wouldnt using Advisory Com mittees services Boss closing remarks ask question talk really want change Yes need change feel change should form special scale group would assist present scale board organization would work independent AMA SC MODELER HOBBY SHOP Helis Planes Cars Boats Radios Parts RC Hobbyists 1999 Larkin Avenue Elgin Illinois 60120 Dept 128312-697-3737 keep district representatives aware feelings isnt just talk feel have ways go will hap pen overnight need cooperation everyone interested Scale Bill Boss asking comments proposals write him let him know feel Bill Boss 77-06 269th St New Hyde Park NY 11040 Mike F Stoti 118 E Wheeler N Man kato MN 65001 CL Combat/Johnson continued page 35 appropriate size around 7mm case X- 15 Dremel works well shap ing venturi Dont forget grind passage fuel get spray bar venturi engines like Fox might coat inside regular venturi crank make sure port isnt open mold release thin coat grease after epoxy sets youll have removable venturi ready shaping aid removal epoxy might try molding piece string give something pull case gets stub born using suction want maximum size venturi possible mak ing lot power retain decent mix ture control might try next idea Find some brass copper tubing little bigger spray bar Drill grind hole tubing just large enough spray bar fit through piece tubing will located inside regular venturi over outlet jet spray bar Secure epoxy solder top tube should w edge primary venturi extend about below spray bar What happens air enters main venturi starts flow downward air enters secondary venturi pro zeeds normal until reaches spray bar really restricts flow alternative air has speed up order join its friends crank port thus creating low pressure area lot suction would have found larger venturi restriction effect youll able run much bigger primary venturi still have reasonable fuel draw easy settings advantages normal short intake stack combat motor arent nearly great rear intake motor because takes quite distance establish air flow through venturi fastest way seal foam use lowheat plastic like Solarfilm Flite Coat etc Time-wise will cost about 30 minutes per plane pocketbook $3-400 weight penalty 1-2 ounces depending covering size ipodel least expensive ways use wrapping paper contact paper weight penalty greater look cute Possibly lightest cheapest strongest use old standard Silkspan white glue/water mixture adhesive Cut tissue approximate size panel saturate very diluted mixture glue water step old mirror pane glass because youll want squeegee out excess water/glue mixture foam surface can lightly pre-glued some mixture dont get carried away fill pores damp Silkspan now molded over wing core Once dry can sprayed clear epoxy extra dash center fuel likely accumulate Riley Wooten claims ounce finishes ounce would easily acceptable since costs 50 model hard shell adds structural strength method saves money costs time limits life plane since fuel will eventually soak surface Wootens new Slew Combat job needs lit tle work make competitive As de signed will too nose-heavy inboard tank engine moved back minimum 22 thrust washer elevator Either make own body 6 longer splice some wood stock body Slow Combat planes should verge being unstable streamer Always practice streamer know what youve got wont disappointed contest stream er slows down affects handling well wheel fuel tank set-up used Dan Rutherfords Cheat er Slow perfect Teezer Too decide outboard tank would suggest using metal strap rubberbands 80 Model Aviation secure tank rather epoxy suggested instructions full tank fuel weighs almost much engine could easily work loose after few flights ground pounding Besides safety factor will disqualified part plane comes off during flight know person disqualified engine spit out crankhe also writes poems Cox 15 hasnt exactly set world fire FAI combat runs well does G-15 Tigre weighs less re stricted enough pull through maneuvers hold consistent needle settings Rossi 15 far above G-15 G-20 Tigre probably wont make difference Team Trials because people will flying usual Fast Com bat style 15-sized airplanes em phasis wont consistency good pitting good wild matches Ive using Tigre X-15 lately place Rossi have pretty good results though weighs /2 ounce like Cox motor sensitive being over-lean much other high performance engines just slows down has never come near seiz ure Fiberglass props necessity high-revving motors 7-4 nylon used G-15s up task Some new wood Quarter Midget props good too Ive using props designed AMA Goodyears available several different manu facturers tend have bit too much pitch since top-end important acceleration Try keep full 7-in diameter pos sible keep revs up de-pitching tips prop wider blade props will give better feel model super narrow speed types larger di ameter wide blade will give zip climbing during consecutive ma neuvers extra diameter helps bit cutting streamer think youve got perfect setup try some Wil kens Wiggles see motor main tains revs plane speed stays up check well stays lines MACA will running US Team Trials over Joly 4th weekend Due lead time magazine may read until just before contest Im told additional fee may enter late site St Louis Addition al manpower needed help run con test either case might contact MACA president Gary Frost 22 Glynn Dr Florissant MO 63031 last column mentioned some neat bearings available new Fox know few disappointed because didnt fit crankshaft inside diam eter bearings same diameter crank isnt need polish bit off crank until bearing nice fingers push-fit crank Some people tried freezing crank heating bearing brute force repeat crank must fitted bearing dont accomplish thing way Rich Brasher has couple cranks left original batch 100 gone will no Write Rich 327 Howland Redwood City CA Charlie Johnson 3716 Ingraham St San Diego CA 92109telephone 714 273-6530 CL Racing/Lee continued page 36 about 5 10 mph over speed whip ping Joe Turkey just passed fly ing position 4 losing 5 mph hes wondering hot dogs 10-15 mph speed advantage came About now faster plane coming wind jury scowling thinking calling foul pilot stops whip turns around starts flying lines off left shoulder again two laps will ready another pass rate foregoing discussion briefly touched effects acceleration wind next last effect consid ered yo-yo Since angular momen August 1977 81 1111 P R 0 D U CT S N C SVILLE ROAD OW GROVE PA 19090 6593900 NOW. THE SUPER POWER TEAM Could Start Something Big SUPER/GEL. EXPRESSLY FOR MODEL USE Say goodby batteries really designed something else No need make anymore Super/Gel Fast Charge & Discharge Needed Models Sealed-In Gel No water no spiii no leak Full 45 amp hours between recharges Long Life Recharge 500 TImes SULLIVAN CHARGER . GREAT TEAMMATE UL Listed Plugs OrdInary House Current Fully Charges Battery 12 Hours 500 ma Output Ideal New Battery Can Used Most Wet Cell Batteries Too