Control Line: Aerobatics

Control Line Aerobatics Ted Fancher IVE SEEN Magnum real Ive also flown Probably exciting development last few years Control Line Stunt announcement early year pending release new Stunt kit Sigthe Mag num Everywhere Ive last six months announcement greeted anxious anticipation Wow Terrific will good Let put concerns rest Magnum entirely competitive aircraft kit promises another example Sigs usual high quality month May pleased find schedule included layovers Des Moines IAjust 60 miles Sig plant Monte zuma Just last month Mike Pratt Mag nums designer invited visit . ever Des Moines Needless say took him up offer twice found self enjoying hospitality Mike lovely wife family Both visits took form tour Sig facilities followed flying session Sigs combination airport model flying field located rolling outskirtsof Montezuma Any modeler planning drive through Iowa should definitely include similar visit tour itinerary Im sure will find interesting did will over whelmed scope operation essive huge building out approximately six major ones includes area set aside prod uct development fully-equipped shop building model airplanes Mike building pre-production versions Magnum insure what sounded good theory will fact function well kit form addition taking pictures con struction process writing notes con struction manual although SOP stand ard operating procedure RC kits will first Sig control-liner couple construction features worthy comment wing cored foam type Lite-Ply stub spars identical highquality hand-built wings Mike has developed ingenious method doing coring labor-intensive absolute must keep costs under control horizontal stab also foam elevators flaps War ren truss-style construction Die cutting has kept minimum very interesting reason As know important use very light balsa building Stunter However successful die cutting can performed very light wood because lacks resilience heavier densities tends crush Much die mashing see result dull cutters assumed last 30 years kit will include construction hard ware including glass-fiber pushrod spe cial control horns serious disappoint ment lack modern large bellcrank airplane size strongly feel minimum bellcrank length 35 four inches needed overcome air loads large control surfaces flew original later experience reinforced con viction Mike agrees principle however costs producing new die injection-mold larger bellcrank would exceed $10000an amount Sig quite understandably unwilling budget just kit build Magnumand hope will suggest using larger bellcrank Aerodynamically Mike has done excel lent job staying right middle ball park no secret weapon far out unproven features moderate size moderate moment arms adequate tail size fly very competitive corners being sensitive Set up Young Paul Zawada Poland filsa mostiyfoam Stunt trainer designed PoppaPlotr Zawada its Cox 09 will pull through round maneuvers really cute kid Photo Piotr Zawada Mikes full-bore ST 60 plen ty power would have preferred de tuning bit good OS FSR strong ST 46 would perfectly adequate dont tell anyone told considering Saito 45 four-cycle Its roughly same weight 60 uses 25 ounces fuel per pattern Hmmmm think Sig giving us real winner urge consider soberIng note came conversation Hazel Sig-Hester has serious con cerns about Sigs ability remain Con trol Line business because current na tionwide crisis liability insurance coverage Although far largest numbers claims come RC flying serious acci dents deaths disablements apparently CL encourage exercise great est possible attention safety activities insure fly well addition drop line con gressman demand write sup port legislation returns responsibility ones actions oneself rapidly ap proaching time liability insurance will simply available institutions provide means whereby support leisure-time activities Lets let happen New subject have twice honored peers Concours dElegance Na tionals 1977 Citation 1981 Intimidation Needless say have some thoughts finishes yet have never done Continued page 162 Preview Fanchers 1986 Nats plane its glossy finish K&B Superpoxynot rubbed outyet photos Ted tells us did column nose fuil Enya 46 four-strokeri Look sneaky cooling air passages Has 4cycie revolution started 66 Model Aviation uceigner MIKS inrau helper BruceTharp prepare fire up ST 60 new Sig Magnum demo flight Sigs Montezu ma IA airstrip Magnum first new Stunter kit ages Ted says files nice SMALL SIZE E PERFORMANCE Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength THE HAND LAUNCH E HI-START H 59 Span 15 Oz 2 Channel 370 Sq Area Computer Modified E-193 Airfoil 4DAVEY SYSTEMS 05EV CORPORATION WOOD LANE MALVERN PA 19355 215 644-6772 Although prop does turn up required 25000 rpm ground seems hook up well engine excellent speeds obtained completely-finished propeller 80-cent price range requires enlargement shaft hole reamer slight amount balancing looks like winner 10%-nitro fuel After full year racing 10%-nitro fuel rule Racing events contest organizers now purchasing decent 10% fuel variability excess water content becoming minimum factors CDs two recent meets supplied Red Max brand fuel excellent results contest also used some Cool-Power found also quite satisfactory Several competitors have commented engine life has really extended since running fuel having 60%-70% nitro commonly case before last rules change As always comments photos solicited John Ballard 10102 Kimblewick Dr Louis ville KY 40223 CL Aerobatics/Fancher Continued page 66 column two reasons First hesitant suggest system presented serious health hazardsas recently-popular ones Second Ive never found system felt wasnt replete land mines like bubbling fillets curdling clears palnts clung des perately masking tape airplane Ive just completed finishing Citation V years Nats last Im pleased enough recommend system As can tell pictures finish Concours-qual ity though yet spit-polished addi tion extremely durable doesnt display evils previous paragraph light weight marvelous system nothing ex otic properly-applied K&B Superpoxy just little help some friends Heres base epoxy applied good old silkspan applied wet over two coats Sig clear butyrate dope thinned always cover wing tail before installing fuselage overlap centerline about inch side produces uniformly rigid wing wont tend break wing/fuse joint After assembly cover nose back high point wing very light glass cloth applied Hobbypoxy Formula II glue thinned brushing consistency Hobby poxy thinner Hint Tack cloth place instant glue before brushing Thin leftover Formula II till its like water brush over bare-wood aft fuselage will seal pores wood provide firm base rest finish Now give fuse its two full coats clear cover light silkspan Apply two coats dope thinned 50e entire air frame allow dry add fillets strong ly suggest fillets epoxy base such Sig Epoxolite Use other fillet mate rials own risk since out everything will epoxy Allow dope fillets dry least 24 hours Sand lightly remove gloss feather paper edges wipe en tire model down thoroughly Sig Airplane Cleaner Prep-Solespecially fillets keep ship scrupulously clean Spray medium coat K&B primer allow cure Eyeball surfaces low spots blemishes fill spack ling compound Sand entire airplane back till paper grain uniformly visible Dont sand through paper Rather pressing hard No 400 paper sand lightly No 220 used dry No 320 also dry Use new paper frequently arent tempt ed press Spray second light-to-medium coat primer repeat process Examine surfaces angle strong light detect final flaws respray such last coat primer resand final surface should uniformly flat no paper grain showing done No 400 paper used wet Rinse plane completely clear water let dry once wipe everything down Sig Cleaner Prep-Sol Make final wipe-down tack rag remove lint static cling Mix epoxy base color ratio col hardener thinner ratio key light epoxy finishes should used mixing colors clear top coat get some orange peel sur face add small amounts additional thinner until palnt flows smoothly Heating paint also helps flow evenly Spray mist coat over entire plane provide tacky surface come right NO55YHIDEAWAYHOB5YHIDEAWAYHO55YHI5EAWAYH55BYHIDEAWAY 22 long 911 upacca 1e CONCORDE Slingshot glider kit PP FAMOUS BRITISH DIESELS CATALOG-DIESEL HANDBOOK pp HOBBY HIDEWAYDELAVAN IL 244-7389 61734 HOSSYHIOEAWAYHOBBVHIOtAWAYIIO55YHIOEAWAYI4OB5YHIOEAU 162 Model Aviation ZO NA MVVO famous line hobby sews Razor #200 Universal #500 Classic R/C ScaleLAK5 ~GRAT TII 0 Wing 15 26 Engines Dealers & Distributors Welcomed Phone 703 273 9593 FLYLINE MODELS INC P 0 Boa 2136 Fsrfs, Vrgrna 22031 U 5 Replacement Blades available dealer FAI Model Supply P0 Box 3967 Torrance CA 90610 back spray wet coat tack coat im portant since undetected grease spots will accept provide surface wont make fisheyes wet coat applied light sanding No 400 paper used wet can followed second light coat color still transparent Another light wet-sanding will prepare surface trim colors Good masking supplies important stencils use Frisket paper available rolls art supply stores masking use Scotch 3M Fine Line Tape part No 021200 Neither material requires clear sealer Make stencil trim design thin poster board tape appropri ate surface trace design soft pencil Mask pencil lines spray trim color Lightly sand time remove ridges trim colors Add detail hearts desire spray mist coat followed im mediately wet coat Super-Poxy clear Twenty-four hours after applying clear polish plane Dupont polishing compound follow good paste wax couple days later Polishing early makes easier obtain buffed finish opposed normal wet look epoxy Waiting couple days before waxing allows epoxy cure completely secret system using same-brand materials paper base final top coat Compatability problems thus eliminated proper precautions namely good spray mask health hazards minimal system works Use confidence Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Scale/Boss Continued page 67 fuselage Low-Wing B would have fuse lage-mounted belicrank lead-outs exiting fuselage above wings upper surface As can seen sketch both situations require some sort lead-out guides near wing tip effort obtain straight line belicrank flying handle mentioned earlier point might appropriate comment lead-out guide used should located respect inboard wingtip Lets assume talking about model has wingspan about 60 inches Experience practice has shown regard less lead-outs exit wing fuselage guide should located close possible wingtip case would say maximum about six inches wing tip have talked about normal practice using external lead-out guides alternative low-and mid-wing installation isin spite couple degrees dihedral wing might haveto put entire control system inside wing meth od have used successfully years low-wing models encountering flight problems does away need unsightly lead-out guides lead-out holes fuselage undersurface wing gives model much better appearance static judging Should use either lowwing methods B external lead-out guides keep mind Method would best-suited Precision Scale models room inside fuselage cockpit detail required Biplanes high-wing planes present unique problems isnt much can hide unsightly lead-outs guides sketch shows typical methods used case high-wing plane location bellcrank fuselage will determine long wing tip lead-out guides have lead-outs parallel bottom wing biplane best results achieved lead-out guide usually attached wing struts located somewhere between ance between wings measured upper surface lower wing cases have tried show sketch form examples typical types lead-out guides used Alongside Low-Wing sketch have shown possible method making removable guides can used low- mid- highwing models guide nothing screw drilled out accept piece formed piano wire nut lock place installed guide mount can made brass aluminum attached appropriate rib other location wing Next LowWing B sketch type lead-out guide can simply piece 1/8-in plywood affixed appropriate rib made removable shown removable appropriate mount will have provided guide shown alongside high-wing sketch simply made bending/forming piano wire attaching rib near tip wing biplane lead-out guide generally made apiece plywood apiece sheet aluminum attached struts between upper lower wings As case low-wing guide examples high-wing biplane guides could also made removable thus providing better model appearance static judging course ultimate alternative methods types planes little ingenuity design removable lead-out guides means connecting flying lines directly belicrank Such case Dave Copemans North American T2J-1 Buck eye 83 Nats Dave could after removing cockpit module model connect flying lines directly belicrank via removable guide wingtip setup certainly allowed model displayed its best static judging would seem little planning some extra effort almost types CL Scale models could made have nonshowing control systems Certainly models WViI II fighters bombers could have attach able line guides removable wing panels line connections could made Biplanes high-wing planes could also have removable line guides perhaps well-executed remov able panel models fuselage behind flexible lead-outs could coiled stored until ready flight object able present model static judging encumbered unsightly lead-out wires However before rushing off incorporate ideas latest creation aware following Unlike RC Scale events contestant allowed rules add antenna model no provision current Control Line rules allows anything added changed model after static judging except propeller spinner flying purposes interpret include removable line guides addition line guide has rarely contested point out possible source trouble plan see area concern addressed during present rules-making cycle submitting rulesSeptember 1986 163 Name Street Address City State Zip