Aeronca K

earlier Aeronca Chief about 1200 built between 1938 1942 todays standards Aeronca K somewhat underpowered Most produced Aeronca E-l 13 twocylinder horizontally-opposed aircooled engine 40 hp though little engine very reliable surely did vi brate airplane also available later 1937 smoother running four-cylinder Continental A-40 few years ago found 3-view fac tory drawing Aeronca K just about right size use building light indoor rubber-powered scale model spite small stabilizer very short nose moment might cause trouble built anyway fear unfounded because say flew right off drawing board making flights minute plus However necessary enlarge horizontal tail surface slightly landing gear lengthened bit accommodate 7-in diameter propeller Except deviations model scale 23/32 equals 1 ft giving wing span 25 7/8 Construction Begin laying side view fuse lage flat surface can easily push straight pins Anchor drawing surface pieces scotch tape like prevent parts sticking drawing start gluing cover clear thin plastic Saran wrap will waxed paper Use 1/16 sq fairly hard balsa longerons uprights Di agonal bracing can 1/32 x 1/16 medium balsa 1/32 sq want go out lightness Cement joints favorite glue go easytoo much adds weight Build second side right top first waiting cover glued joint first side small piece same type film used cover drawing Joining two fuselage sides perfect alignment can difficult sometimes experienced builder First glue two tail posts together station 10 aligning two sides over top view glue top bottom cross-pieces Sta 5 let dry thoroughly cabin sides rather curved Therefore previously glued joints complete ly dry will easier dampen wood ahead Sta 5 before bending simply hold parts curved under faucet However used water soluble glue better try continued page 78 Top When newnow 5-1/2 years oldthe K ultra light weight good 90 seconds Left assembling struts half wing panels can quickly attached removed travel details show clearly photo directly above does center section construction two dowel ends jutting side slide wing holes Model pix rebuilt after another in-flight model fell lightly doped yellow black trim lines Photos John Sites CL Navy Carrier continued page 28 modelers now receiving rules infor mation part services magazine should know what happening events Get views CLCB Ad visory Committee representatives NATS way excellent opportunity direct contact representative contest hoards advisory committees Colors Markings fact appropri ate paint schemes markings required Carrier models Profile included should come no surprise information appro priate paint markings hard find some areas make information available need will section column next few months will follow development US Navy coloring markings Since have numerous color schemes used US Navy aircraft over years Carrier events should never suffer lack variety Before WW Navy no standardized paint scheme no established US national marking internationally rec ognized US entry war standardized national marking necessary standard camouflage paint adopted Navy aircraft color used initially designated stone grey used entire aircraft 1920 color replaced silver parts aircraft except metal areas remained grey lighter shade grey troduced 1930 replaced six years later silver adopted basic color Navy aircraft color persisted until approach WW II camouflage again came desirable During period starting mid-1920s upper surfaces wing horizontal tail air craft painted chrome yellow aid vis ibility first standardized national marking car ried Navy aircraft red white blue star emblem shown drawing emblem carried both sides upper TRY SCALE ACCESSORIES KITS INE GUN KITS ENGINE KITS & CYLINDERS PILOTS LS PROPS & HANGERS SPINNERS INGS CANOPIES K COWLS ASK FOR OUR PRODUCTS AT YOUR DEALER OR SEND 25 FOR OUR CATALOG WILLIAMS BROSDEPT M 181 PAWNEE ST SAN MARCOS CA 92069 AMA NUMBERS TO MATCH AMA LETTERS 21/2 AND 15/5 TWO SETE--$175 FOUR EETE--$3 00 FROM MONTGOMERY SIGNS 409 STONESTREET AVENUE ROeRVILLE MO 20850 lower surfaces wings sup plemented vertical blue white red stripes rudder blue stripe appearing forward stripe standardize US markings allies Navy adopted roundel mark ing consisting white center blue inner ring red outer ring same time order tail stripes reversed red stripe forward blue stripe aft Following WW markings reverted hack original star tail stripes markings continued use until beginning WW II although tail stripes gradually replaced solid color tails used identify particular units next installment will cover some variations appeared during WW 11 New Products accompanying photo new throttle bellcrank put out G-S Prod ucts Corp Intl PO Box 488 La Grande Ore 97850 U-S bellcrank quite strong should handle heaviest Class II ship no fear bending anything having unit hind up bellerank operates very smoothly has throttle arm movement 1 1/4 inches about 50 percent Roberts unit bellcranks come both upright inverted units either short long elevator belleranks giving total four combinations choose photo shows short upright version As can see elevator control arm re versed forward line up line elevator horn mounted below elevator throttle arm shaped allow use clevis type connector terference problems U-S Products will also market handle go bellerank unit U-S handle required take full advantage full throttle range U-S bellerank hut bellerank can used Roberts handle will still give about 25 percent throt tle movement Roberts bellerank price bellerank $495 handle $995 units should available time read Aeronca K continued page 31 damp place structure over top view bend two sides match draw ing Block pin structure place add remaining cross pieces 1/16 sq Cut Sta 2 former instrument panel Sta 3 1/16 sheet glue place space between Sta 2 & 3 covered light weight 1/32 sheet preferably 1/64 have wood grain should run fore aft direction Add re maining diagonal braces top bottom Carve upper nose piece soft balsa block about 3/4 x x /2 hollow out about 3/32 thick Dont try initially carve exact shape final shaping done after everything glued together dry same man ner carve hollow lower piece block approx 5/8 x 3/4 x 1 bottom upper piece Cut four 3/4 diameter discs 1/16 balsa 3/8 sq hole center accom modate Williams Bros plastic nose ton bearing laminate together alter nating grain direction Join upper nose piece both nose pieces front fuselage Carefully sand parts final outline shape drawing Make windshield V-brace two side braces between Sta 3 & 4 1/16 sq sanded round shape Add other V-brac ing 1/32 sq cabin top between Sta 4 & 5 landing gear support piece 1/16 balsa 3/4 x bottom fuse lage centered between cross braces Sta 3 & 4 Cut triangular pieces 7/16 x 7/16 1/32 flat 1/8 hole center fit glue place shown small perspective view 1/8 holes receive ends 1/16 round struts allowing flexing gear fore aft can skip work build optional gear used later K models shown side view broken lines fairing Bend wing strut attach fittings 015 music wire attach fuselage bottom Sta 4 Make two motor peg attach supports 1/32 hard light 1/16 cut 1/8 diam peg hole glue place side Sta 9 Add tail skid shaped 1/16 balsa landing gear single piece 1/32 music wire bent shape glued against bottom fuselage Make fairing two pieces 1/32 flat glued together wire gear leg between dont glue fairing fuselage leave free flex Wheels balsa 3/8 wide lightest can find Glue washer side bearing hollow opposite side about 1/8 deep glue washer bottom other bearing Mount wheels retain another washer held wire axle tiny drop epoxy Cover hole balsa hub cap painted yellow Build two wing panels directly over plans left right Experienced builders may wish use sliced rib technique rather solid ribs less experienced may wish try hand 78 Model Aviation method save weight because really isnt too difficult using solid ribs make template shape cut 20 ribs 1/32 flat medium light weight balsa preferably c grain has flaky mother-ofpearl appearance surface resistant bending use sliced ribs will still need six solid ribs root rib panel four center section use upper curve template slice 14 pieces light 1/16 flat 1/16 deep need tops bot toms 14 pieces 1/16 sq exactly 2 3/4 inches long front spar 1/32 x 3/16 solid rib arrangement 1/32 x 5/32 sliced rear spar 1/32 x 5/32 solid 1/32 x 1/8 sliced Use C grain wood spars Select strong straight 1/16 sq leading edges likewise trailing edges except 1/16 x 1/8 sanded tapered cross section either before after assembly Make wing tips first soaking three strips 1/32 x 1/16 balsa hot water few minutes adding ribbon white glue along bending three wet around form having wing tip shape secret find anchor three joined strips form strip masking tape strips between fingers pull guide around form chor end takes some practice demountable wings cement short 1/16 diam alum tubes top wing spars first cutting holes through root rib ends fit exactly flush outer surface Incline root ribs slightly dihedral 3 degrees Add small triangle pieces 1/32 wing strut attach points Build center section over fuse lage top view composed leading edge trailing edge rear spar 2 3/4 inches long plus four 1/32 ribs skylight rear piece 1/32 x 11/32 x 5/16 two short frontsparseach l/16x 13/64deepx 11/16 Cement whole assembly top fuse lage aligning very carefully Make windshield pattern paper cut try fits use cut windshield very thin clear plastic add glue around edges white glue usually works hold place tape pins until dry stabilizer 1/16 sq except six 1/32 x 1/16 ribs tips laminated three 1/32 x 1/16 strips wing tips Likewise fin rudder assembly 1/16 sq except 1/32 x 1/16 ribs laminated outline Three lengths thin copper wire pushed through pin holes two spars well glued ribs serve bendable binges rudder adjustment Make two front wing struts 3/32 x 7/32 x 6 3/8 sanded streamline cross-section two rear 1/8 x 5/32 x 6 Trim end rear fit against front glue together form V exactly 1/8 between open ends jury strut assembly has front upright 1/8 x 5/32 x 7/32 other two pieces cut fit 1/16 round Bend attach hooks 015 music wir bind thread glue lower end front struts Paint strut assemblies yellow Cover wings see next paragraph first stabilizer rudder fin fuse lage yellow tissue center section until wire wing supports have made mounted glued Make three supports 1/32 wire insert ends aluminum tubes wings sliding up dihedral bend Cut notches root ribs above spars lower support wires wing panels attached onto tops spars glue securely after making sure wings fuselage perfect alignment Now plug notches root ribs scrap 1/32 cover centersection glue stabilizer top fuselage finally mount fin rudder assembly License numbers may cut black tissue before covering prefer lay tissue over drawing part covered trace outlines numbers using black india ink straight edge drafting pen fill outlines ink cover part Door outlines fuselage strips can made similar fashion well cabin window outlines windows cut out tissue within window outline using sharp blade cover holes strip cellophane white glued inner surface tissue cover fuselage side covered parts may lightly sprayed water shrink tissue pin down wings tail parts until dry prevent warping Doping isnt necessary indoor flying two coats thinned well-plasticized dope will seal out moisture prevent tissue sagging high humidity use Micro-Coat available Micro-X 5200 Seven Pines Dr Lorain Ohio 44053 well other indoor model supplies hard find goodies obtainable Oldtimer Models 7454 W Thurston Circle Milwaukee Wise 53218 West Coast try PeckPolymers PO Box 2498 La Mesa Calif 92041 Marlow Engineering 2650 VinelandN Hollywood Ca91605 Make dummy engine balsa pins etc add other details may wish including fuel cap gauge aileron elevator cowl dividing line stripes door handles etc Carve balsa propeller block shown use 7 plastic youve built light 18 20 loop 1/8 Pirelli should fly nicely tail heavy perish thought add clay WANTED ideas happenings hints/kinks how-to sketches photos news etc Send columnist category concernedat address shown column photo idea printed Model Aviation will pa y $5 contributor w -J -J U Lfl IU 0 * COMPETITION PROVEN * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIA PITCH 5%3 63 73/.3/, 4 83%456 94677 10466W 7 8W 106EW* 7h7%8 116EW 1167 126 125W 1356 1436 155 164/ W WIDE BLADE EW EXTRA WIDE ALL NEW SERIES 400 B FOR SPEED & RACING NEW ADVANCED DESIGN TERRIFIC INCREASE IN THRUST & SPEED LEADING SPEED RECORD HOLDER 72 73 74 WAPITCHPRICE 46, 785 4%5 585 678EV95 7 566N7/ 1OA11100 899N105 877/,7/125 977A7I 121325 N NARROW PRICE 75 75 100 100 105 115 120 130 135 135 140 145 165 185 225 275 nose dont want experimental airplane replace X NC model pictures now four years old shows signs wear Wings tail originally covered Microlite very thin polycarbon ate film used making electrical capaci tors available Micro-X fuselage covered dyed condenser paper Original weight less iving flight times 1 minutes plus later painted wings tail yellow vinyl ink caused wrinkles added weight cut flight time Unless just wish experiment suggest Japanese tissue whole model August1975 79 HIGH PERFORMANCE ASK YOUR DEALER