Lil' Chugger

T Lii Chugger no new kid block having flown several configurations since 1988 competition Free Flight airplane developed AMA 1/2A classes FAJ FlJ easily constructed proven winner Nats level competition F 265 300 sizes Variable Incidence Tailplane VIT Chugger 300 Mk II evolved first-generation Chugger 265 originally built 1988 based Gil Morris Matchsticks construction simplified conventional building materials employed Cox TD 049 engine used time flying surfaces MylarTM covered led inconsistencies power patternno doubt because wing flex MylarTM Photos author Graphic Design Carla Kunz removed replaced tissue-and-dope solved problem have used tissue small power models ever since After covering swapout airplane placed high 1989 90 Nats fifth second introduction more-powerful Shuriken engine required design update 1991 wing area increased 265 square inches 300 lengthened tail moment smaller stab enabled comfortably handle increased power glide also improved airplane subsequently lost 1993 Nats after encountering some super lift seen dethermalize DT never found Flights finished 265 backup ended up fourth place 1994 Lubbock Nats six-year-old plain-vanilla Chugger 265 retrofitted Stels 049 again brought out semiretirement posted five maxes downer somewhat iffy weather capture first win Open 1/2A class Left The author Chugger Nats-winning design has thoroughly tested sized optimize available power 60 Model Aviation onal Free Flight So7md Power Year U Robert Dunham II Above Ready launch Robert about pull release pin modified Tomy timer Built-up tailboom no problem current version sports easily formed music-wire ViT 1/2 gram operated customized Tomy engine cutoff timer improvement climb angle speed impressive bonus being able independently fine-tune glide setting wing aspect ratio increased diagonals added wing stab make surfaces torsion-resistant 300 Mk II VIT best Chuggers date confirmed winning Gas placing second F1J 1996 Nats reversing positions 1997 potential winner FlJ against very tough competition Free Flighters composite materials construction methods hope others will attracted Chugger-type modelsnot sophisticated proven ability successfully compete against so-called high-tech competition big plus stick-and-tissue construction modus operandi average modeler gather up lumber parts required hobby shop morning start chips flying aftemoon actually become builder model instead assembler good reliable steady running 05 06 engine must will no need purchase often-expensive long-delivery cottage-industry parts such machined pans carbon tailbooms VIT/bunt hardware elevator saddle folding prop formed composite leading edges etc Instead might look investing good locator system could come very handy Chugger finds some really good lift all-up flying weight 300 Mk II complete VIT should 675 75 ounces weight range very attainable build carefully watch wood selection covering material finish time have chosen employ bunt method transition depend light weight modest-but-adequate wing aspect ratio forward balance point help make transition go smoothly features assist transition critical short engine runs allowed deciding late rounds am antibunt good bunt pretty watch untimely misfire can bring string maxes screeching halt hurry Good air-picking necessity no matter what design features happen beand therein often lurks thin line separation between fliers CONSTRUCTION Spend couple evenings studying plans going scratch-build project although its difficult should have some previous knowledge working balsa structures should have built several similarly constructed models have good Cox TD AME 049 wish use take 300 plan copy shop have make print using 5% reduction factor cost will minimal result will 265-squareinch flat wing plan everything else proper proportion Wood sizes remain same finished weight combination should exceed 625 ounces use Duco cement primary glue balsa construction because its lightness repairability plus its brittle sands well Cyanoacrylate CyA glues epoxies have applications heavily fuel-wetted areas used sparingly However quick-fix field repairs CyA can best friend Fuselage skeptics about merits stick-and-tissue tailbooms can say four Chuggers have logged several hundred flights has boom broken reason Small lightly loaded power models descend slowly DT mode land much fuss fabricated wooden structure seems forgiving probably less brittle seems io flex breaking main 1/ square longerons should matched closely possible grain stiffness hardness sometimes difficult use prestripped stock suggest build borrow buy balsa stripper cut own strips sheet stock Produce four good square-sided strips tag end can keep track came off sheet Pin plan heavy end nose YI6 sheet side panel should installed vertical uprights positioned shown diagonals added 62 Model Aviation king radio top type sold Jim Waiston light weight offers protection against loss Snuffer tube lower left extinguishes detilermalizer fuse Timer weighs eight grams handles engine shutoff far left VIT functions Pacifier mounted bottom makes wire skid unnecessary saves weight might find simple cutting jig shown helpful producing en masse minimum time effort Repeat companion side construct directly top just completed Remember diagonals side run opposite corners makes structure fully geodetic finished sides removed plan separated placed flat surface lightly block-sanded front back remove glue bumps other irregularities Carefully prepare A6 bulkheads six-pound balsa making sure cut accurately square corners Lay right-side structure flat building board glue bulkheads appropriate positions keeping vertical until set left side glued vertical bulkheads two positions time beginning F-l back F-3 watching make sure everything kept aligned true Lift basic fuselage frame building board drop glue forward fuselage bottom panels grain long way top panel cross-grain Install cross-members diagonals F-3 forward let everything set least hour Bring fuselage sides together rear before gluing cut former F-4 width retain curvature have chosen satisfied sighted symmetrical appearance glue everything together install top bottom braces followed diagonals front firewall 1/8 plywood engine mounting method will depend power plant selected can probably purchase machined radialmount adapter ring replaces engine backplate greatly simplifying problem Blind mounting nuts installed back side plywood accept ring firewall slow-cure epoxied place fuselage thrust offsets shown plan 1/2A Gas 1989 USOC 1990 Nats 1991 Nats 1993 Nats 1994 Nats 1995 Nats 1996 Nats 1997 Nats Fl J 1995 Nats 1996 Nats 1997 Nats 5th265 2nd265 2nd300 4th300 1st265 4th300 1st300 2nd300 2nd 2nd 1st 300 300 300 Cox ID 049 Cox TD049 Shuriken 05 Shuriken 05 Stels 049 Shuriken 05 VIT Shuriken 05 VIT Shuriken 05 VII Shuriken 05 VII Shuriken 05 VII Shuriken 05 VII July1998 63 Music wire Variable Incidence Tailpiane VIT arm allows fine-tuning climb glide settings best performance Power position shown w Type FF /2A-FlJ Wingspan 53 inches Engine 05-06 Flying weight 675-75 ounces Construction Built-up Covering/finish Japanese tissue dope VIT arm pivots rearward allow stab pop up DT Limit line holds stab proper angle floating descent 4-40 screw used adjust incidence Full-Size Plans Availablesee page 181 II 0 z33 F0 3 303 00 3o i-I 330 00 033 3 3 3- 30 I33 0 F-0 33 33 333 33333 V3330 330 ~.oo33 3t000 FI 33333333 I-I 0 F3 I-3 I-FTh I3 33 IFIIN 0II 3 0I I-I 033333 I-Fil/ / A-.- jI F .r~IF I3 30 FI0I3l 3 - 33 000 3 3 3 3 33 033 0F-0/033X ~FF /03 33 F I0 F-330F F3333333 103 F3/ 3 F F30/ 3033\ 0 I / FF-33... 3333\3F 3/33 IF033 I33303333 0033 33 /F 333 3333 IF -3.3/ F3 F333-\F F3F F-3/ F- 0/ 3F F~ F-I03 333iii3 333g/133\\ 330 I/I~A 333-3/1~/0 -/0 3.-.0\ /3333 3\/33 /3 L13 3333/33333 033 /003 F-03 uiE330/30 333/330333 333333-333 F F 3 F F F-0Iii/ 3F0FF 3333 \\ Ji ~rtK2 ~ - %\$F33IF F F iiI34J1K 333 33 3 33 333 %% 30 00 0 033 3F 33333 330 0 -30 0 033 3333 00 03 3/ 300 330 IF 33 33333 -F333003 /3 3F-33 33 3-0003 F-3333-F-003 333330 333—Z0F-3333 3300330033330 *033 33333F31*0 OF0 333303 3333333333 333 330 03333 0333333 033333 3300030033 003333 033303333 000333 33 0 64 Model Aviation 333 33 33 33333 3303 333 33333 33301 II K 2 33 F ji r JO 333 03 -33- lack landing skid oversight has found unnecessary good place save several grams valuable weight /te sheet rudder should no problem assemblejust keep grain direction shown Sand symmetrical airfoil section dont overlook 1/16 square stiffener insert rudder extends through fuselage bottom sheet until makes good solid contact top sheet final-gluing close attention should paid perpendicularity neutral alignment Timer I have used modified Tomy timers engine cutoff VIT activation small power models years find very reliable run steadily minimally affected engine vibration also tolerate reasonable amount disc loading believe timer malfunctions centered around pilot errornot activating start button incorrect disc positioning wrong line hookups etc happen everyone manufacturer toys continually introduces new figures have different articulations shaft takeoffs accommodate animation required never know until disassembly whether toy will suited application However fortunate stumble across Tomy motorboat attributes required purchased dozen am going elaborate modification procedure several good articles have published US British magazines Attention should brought Tomys eight-gram finished weight $2 cost enjoyment received gyrations prior loboTomy crossover wire system makes unnecessary slow down pawl thereby reducing chance stalling action happens end result total disaster Balsa Building Board smooth surface is3 Sizes excellent pining parts available place gluing together Pieces cut cross grain end wood grain makes up surface allows multiple cuts surface crumbling Board slightly flexible Price includes S & H MI residents add 6% sales tax will conform table topSorry no orders outside continenlal U S #24 24V#3636~1#48 O734-434-8928 D0VF4lA@Prodigycom PO Box 178 Check money Milan MI 48160 order T-ON Davis Diesel Heads Over 101 models 04936 ci OWEN Wadis krgest prodeur Model Diesel Feels LESS HASSIEYMORE FUN Dieselize Davis Diesel Its Awesome * Up 50% Power Easy Starting Sk1S4J No Glow Plugs Jlvice Long * Scale Sound DAVIS P0 Box 141 DeMA MODEL PRODUCTS complete rmation packet send $400 credit applied first order 1120 Wrigley Way Milpitas California 95035 Voice/Fax 408 946-4751 408 WINGS-51 LOOK no further fully molded sailplane needs RnR offer selection high performance sailplanes will address specific requirements F3BThermal Duration Slope Cross Country Mark Allen designed World Championship F3B EAGLE now being produced RnR its new lower price RnR sailplane enjoys design construction enhancements 1997 RnRs composite molded technology provides unique blend strength weight optimization Noticeable results found through increased durability torsional stability stiffness incorporated wing fuselage tail section also offer selection parts joiner systems scratch builders out catch latest visuals specifications competitive pricing RnRs sailplanes contact RnR RnR skys limit. July1998 65 PRODUCTS NE tachometer Used Dave Patrick OC Teau Easterday Sill Ileaupel M144C/Made*a Cheapieu Doug Creakkite C1 e, Radio Specfrtim FEATURES Auto shut-off Surperb Accuracy Ergonomic design Display x 10 RPM Large LCD display Reads 2 3 4 blades RPM range 10 99990 Advance touch control 9 Volt battery included Available local hobby shop call us number below will need bring another load balsa dont want try luck Tomy purchase Texas Timer Mini Seelig four-function /2A timer Both dependable require no modification weigh 16-20 grams Regardless line hookups will require some improvisation depending run lines internally externally choose VIT locked-up Just dont forget 9-12-gram weight penalty rides along flight Pylon The wing pylon best built halves Prepare /s x ing trailing edges /s plywood holddown inserts epoxied place Three pylon ribs cut A2 balsa sheet two cut half long direction match-marked Pin LE TE pieces plan glue bottom middle half-ribs Remove plan attach companion half-ribs full top rib 1/6 square vertical stiffener fitted place glued sides A2 sheet added edges trimmed As sheet wing platform pieced together cut length width 1/16 x Vs hard edge runners added completed platform glued pylon attention being paid alignment part put aside until other components completed airplane completely assembled locate pylon CG 66% chord Wing The wing constructed separate panels care should taken choose wood somewhere near density grain indicated accurate gram scale helps A6 plywood cutting template should made center panel rib W- 1 helpful push straight pins through template two positions just barely protruding CyA place pins ensure template stays put slicing ribs light As C-grain balsa sheet Locate spar notches during operation trailing edge chosen wrapfree medium-weight x p stock WATER JET CUT CARBON FIBER STRIPS Latest Technology No Sanding Necessary Smooth Edges Great Spar Caps Precision Cut Strips Foam Wing Reinforcement Bondable Surf eces Lowest Prices CLi 1007 Thick l/Cx48 2/pkgl S315 3/8n48 2 pkgl S350 CL2I014Thkkl 1/4x46 2/phg S400 3/8x48 12 pkgl S415 CL3 1022 Thick 1/4x4812/pkgS500 3/8x4812 phg SA15 CL4 1030 Thick 1/4x48 2/pkgl SAtO 3/8x48 2 pkg S900 Send SASE information additional sizes products Add $500 shipping handlinq Calif residents odd 825% tax Overseas orders add 15% OrderCOD MCI VISA send check money order Aerospace CompositeProducts 1 4210 DOOLITILt Ot SAN LEANDRO CA 94577 352-2022 FAX 510 3522021 rib inset notches located cut Dremel scroll saw /is deep insets greatly strengthen rib attachment point should tight fit rib TE has very slight taper conform top camber slope sanding block mini razor-plane will job careful Dont let blunt trailing edge construction turn off have used construction power models Mulvihills cant tell difference performance compared full taper Windtunnel tests show top surface air flow has turbulated broken away long before reaching point wing blunt construction no disadvantage Just try think might like Weight consideration better wood selection other reasons choice Pin LE TE /s square bottom spar plan lay full straight ribs As vertical shear webs installed flush back edge bottom spar half-ribs installed followed /s square top spar Cut diagonal ribs C-grain sheet install Omit rear spar notches can located accurately later after panels joined tip panels similar construction main panels except As x diagonals used between full straight ribs crossover point diagonals should glued rear spar crossover doesnt touch spar gap must bridged short lengths scrap balsa glued points add integrity part wing provide considerable torsional stiffness preventing high-speed flutter twisting completed panels prepared polyhedral carefully trimming sanding LE TE main spars slow tedious job abutments must tight fit touching points Epoxy used overlapping /A plywood braces Since TE does have large gluing area small /64 plywood keepers imbedded strengthen critical juncture carving LE shape introduce small 66 Model Aviation rt *ircra ft us sw dIt,bute w 107 EDWARD AVE FULLERTON CA 92833 tnfo7t4 680-5858 Fax7t468t3-5550 DEALERS INQUIRiES WELCOME amount /32 inch Phillips entry bottom side other bits pieces can now added including TE wing rubber plywood reinforcement LE balsa fill slanted 3A2 tip ribs whole structure should sanded smooth prepared covering Stabilizer The construction similar wing except trailing edge constructed L-shaped cross-section using A6 X /8 medium balsa Light wood should used throughout target finished weight should 9-1 1 grams Construct install stab mount slight amount left turn tilt /l6 inch should visible translates left tip being high viewed rear Covering/Finish Japanese tissue recommended covering material Chugger principally because its light weight tautness structures edges contact covering should given coat unthinned butyrate dope lightly sanded 200-grit paper remove fuzz raised grain Tissue applied same dope sprayed water tighten Two coats thinned clear dope applied flying surfaces boom portion fuselage bottom side first three inboard bays wing double-covered tissue watershrunk doped spray coat colored epoxy paint applied front fuselage starting just behind pylon provides additional protection against deterioration fuel spray handling slight amount /32 less washout trailing edge high viewed rear should introduced tip panels holding position until dope has dried Over-tweaking generally needed since will tendency structure return its original shape hopefully 1/16 washout will retained same method used apply /s washin right main wing panel tweaking-and-holding procedure repeated subsequent occasions recovering doping large areas required normal maintenance have successful building-in subtle wing warps open-structured surfaces find best induced during covering operation Check intentional warps periodically especially damp conditions before making competition flights Preflight Before proceeding flying field important complete detail work prove-out various flight systems make sure everything functioning properly wing keyed short lengths square balsa resulting slide fit wing platform center gravity CG can now located within range 62-66% wing chord fuselage ballasted lead make corrections safe CC should rearward 66% point flight adjustments could become complicated difficult diagnose correct especially important ascertain VIT/engine cutoff timer disc overloaded point will run steadily must able withstand sufficient rubber band tension keep stab firmly seated power mode sure fuel pinchoff mechanism Reid Simpson gadget located close proximity engine needle valve closes shut authority foolproof last check done engine running course same time can observe rotational speed timer disc mark three-second location first test flights maiden test hop should preceded test-gliding over high grass stab glide position prop removed optimum glide slight left bank no tendency stall Correct stall dive deftly adjusting wire VIT arm using needle-nose pliers adding /64 plywood shims stab top bottom rub plates establish initial power setting lower stab TE about 1 /2 turns 440 adjusting screw Never fly fuse take care matter cutting CONVENIENT WAY TO HOLD AND SUPPORT YOUR PLANE Sturdy steel tube construction Protective padded uprightsl EASY ON YOUR BACK NO NEED TO BEND OVER WHILE ASSEMBLING MODEL Sturdy steel tube construction Supports up 55 lbs weight Available Now Contact favorite hobby supplier pricing INC 400 S Indiana St PO Box 564 Hobart IN 46342 800 348-3497 EMaiI kits@midwestpmductscom July1998 67 KEEPS YUUH KNLL ULAN AND COMFORTABLE LargelO5 x 22 pad Water resistant FAIL SAFES RAM has originated fail safes other R/C manufacturer Check out latest versions local hobby shop send stamped 1 0 envelope full info RAM 09BATTERY BACKER redundant baft syst up 60 size model$3995 RAM 11LOW BATTERY ALARM audio visual 48V 96V2495 RAM 12LOW FUEL LIGHT glo fuel monitor visible flight1995 RAM 17LOST PLANE FINDER Mk Il 65 DB 50 battery2495 RAM 18BIG AIRPLANE RF DE-GLITOHER SYSTEM replaces 10 chokes895 RAM 22SIMPLE CYCLER discharges 48V & 96V batt up 600 MA1995 RAM 25BIG PLANE BATTERY BACKER 10 amp cap w/2 switch harnesses5995 RAM 26BIG BATTERY CYCLER discharges 48V baIt up 4000 MA2495 RAM 49IGNITER 800 MA board driver/starter 20 & 21 engine4995 RAM 50IGNITER 1300 MA board driver/starter 35 & up engine4995 RAM 62SERVO FAIL SAFE adj sate point & delay waterproo fable2495 RAM 83RADIO SIGNAL WATCH DOG Provides 4 functions 1/2 oz1495 unavailable locally send check money order full credit card info cost item plus $400 l$500 foreignl immediate shipment Include full address UPS Sorry no COD ~am 229E E Rollins Rd d Lake BeaCh IL 60073 Introducing 30 Wingspan Laser Cut Rubber Powered Flying Models #301 Over 80 LASER CUT PARTS Kit #302 Over 70 LPARTS Kit #303 Over 75 LASER CUT PARTS good thing just got bigger expanding line airplanes addition new 30 wingspan laser cut kits Like walnut series line geared toward exciting subject matter captures best model aviation has offer Besides offering cleanest laser cuts comprehensive plans free flight kit provide following quality features I-land Selected Balsa Color Peel & Stick Decal Set 9 Plastic Propeller Full Size Plan FAI Tan II Rubber Step Step Instructions Vacuum Molded Parts Light Weight Colored Tissue Call today 1-800-458-2828 Ext 800 ask information packet Dumas line Rubber Powered Flying Models dumas aircraft DUMAS PRODUCTS INC 9O9AMA E 17th St Tucson AZ 85719 Phone 520-623-3742 Fax 520-620-1329 E-MAIL dumas@azstarnetcom installing short fuse has end charred easy lighting Set engine timer no three seconds Start engine needle nearly full power using mild fuel 30% nitru Light fuse gently launch Chugger straight up keeping wings level should accelerate rapidly nearly vertical right spiral should about 200 feet high engine cuts Hopefully will get glimpse glide before DT correct dive stall adjusting wire VII arm Chugger headed vertical loop under power overelevated stab adjustment screw should lowered /2 turn depending upon severity maneuver power pattern flat arcs over toward ground underelevated raise screw -Y2 turn glide circle adjusted stab tilt approximately 150 feet diameter power turn adjusted making small changes rudder tab cant emphasize enough much effect changes magnified during highspeed climb engine thrust offsets have built correctly no adjustments should required long engine runs observe gentle left roll conjunction right turn no problem long does become excessive right wing washin becomes effective high speed causing lift against right turn induced prop wash impinging pylon underslung rudderall keeping nose up during climb As climb glide pattern optimized gradually increase fuel nitro engine run up seven seconds longer gliding flights can observed before DI may take dozen flights test session Chugger should close being ready hit contest circuit Flyoff Tactics presumptuous believe Chugger others should capable consistently making AMA Cat III seven-second engine run two-minute-max flights another matter however consistently successful four-second engine-run 2/2-minute max reach plateau observations careful attention details required prior official flight ground- possibly air- check engine run should performed second attempts allowed Backing-off engine timer recommended allow sound travel timekeeper reaction delays lime management also comes play since toward days end often two three fliers left Few airplanes short engine runs being flown late may have rely other means bubbles streamers thermistors observe monitor air quality Flyoff flights commonly take place waning houi-s meet air cooling time running out flight behind less hour remains might consider assembling backup model flights can put up rapid succession Just act preparing second airplaneeven competitivecan sometimes create panic cause opposition rush pick bad air Hopefully can take advantage move aheaddesperate measures desperate times Round up some chasing help can remain flightline get airbome again FIJ flying format completely different rounds first five flights progressively longer maxes flyoff Under certain weather conditions long flights introduce timers eyesight equation always supply timer good pair binoculars Ask him acquaint himself strongly suggest focus well advance airplane disappearing event ask him spot airplane down mark line terrain feature hope build Lil Chugger paths will cross some future competition please introduce yourself relate experiences design have questions want confer building question please contact Robert Dunham II Box 904066 Tulsa OK 74105 -ss Antiques Military Civrlion Helicopters Sailplanes2 hove worlds largest airrult documentation collection 7000 different full color photo studies 1903-1997 1998 C 350003 view line drawings ulde 200 pose JYQe ea $500 OflIv8OO Canada -Bob Banka e Research -enue a Mesa CA 92626 7141 979-8058 http //www mt net ms/scaie htmi 68 Model Aviation

T Lii Chugger no new kid block having flown several configurations since 1988 competition Free Flight airplane developed AMA 1/2A classes FAJ FlJ easily constructed proven winner Nats level competition F 265 300 sizes Variable Incidence Tailplane VIT Chugger 300 Mk II evolved first-generation Chugger 265 originally built 1988 based Gil Morris Matchsticks construction simplified conventional building materials employed Cox TD 049 engine used time flying surfaces MylarTM covered led inconsistencies power patternno doubt because wing flex MylarTM Photos author Graphic Design Carla Kunz removed replaced tissue-and-dope solved problem have used tissue small power models ever since After covering swapout airplane placed high 1989 90 Nats fifth second introduction more-powerful Shuriken engine required design update 1991 wing area increased 265 square inches 300 lengthened tail moment smaller stab enabled comfortably handle increased power glide also improved airplane subsequently lost 1993 Nats after encountering some super lift seen dethermalize DT never found Flights finished 265 backup ended up fourth place 1994 Lubbock Nats six-year-old plain-vanilla Chugger 265 retrofitted Stels 049 again brought out semiretirement posted five maxes downer somewhat iffy weather capture first win Open 1/2A class Left The author Chugger Nats-winning design has thoroughly tested sized optimize available power 60 Model Aviation onal Free Flight So7md Power Year U Robert Dunham II Above Ready launch Robert about pull release pin modified Tomy timer Built-up tailboom no problem current version sports easily formed music-wire ViT 1/2 gram operated customized Tomy engine cutoff timer improvement climb angle speed impressive bonus being able independently fine-tune glide setting wing aspect ratio increased diagonals added wing stab make surfaces torsion-resistant 300 Mk II VIT best Chuggers date confirmed winning Gas placing second F1J 1996 Nats reversing positions 1997 potential winner FlJ against very tough competition Free Flighters composite materials construction methods hope others will attracted Chugger-type modelsnot sophisticated proven ability successfully compete against so-called high-tech competition big plus stick-and-tissue construction modus operandi average modeler gather up lumber parts required hobby shop morning start chips flying aftemoon actually become builder model instead assembler good reliable steady running 05 06 engine must will no need purchase often-expensive long-delivery cottage-industry parts such machined pans carbon tailbooms VIT/bunt hardware elevator saddle folding prop formed composite leading edges etc Instead might look investing good locator system could come very handy Chugger finds some really good lift all-up flying weight 300 Mk II complete VIT should 675 75 ounces weight range very attainable build carefully watch wood selection covering material finish time have chosen employ bunt method transition depend light weight modest-but-adequate wing aspect ratio forward balance point help make transition go smoothly features assist transition critical short engine runs allowed deciding late rounds am antibunt good bunt pretty watch untimely misfire can bring string maxes screeching halt hurry Good air-picking necessity no matter what design features happen beand therein often lurks thin line separation between fliers CONSTRUCTION Spend couple evenings studying plans going scratch-build project although its difficult should have some previous knowledge working balsa structures should have built several similarly constructed models have good Cox TD AME 049 wish use take 300 plan copy shop have make print using 5% reduction factor cost will minimal result will 265-squareinch flat wing plan everything else proper proportion Wood sizes remain same finished weight combination should exceed 625 ounces use Duco cement primary glue balsa construction because its lightness repairability plus its brittle sands well Cyanoacrylate CyA glues epoxies have applications heavily fuel-wetted areas used sparingly However quick-fix field repairs CyA can best friend Fuselage skeptics about merits stick-and-tissue tailbooms can say four Chuggers have logged several hundred flights has boom broken reason Small lightly loaded power models descend slowly DT mode land much fuss fabricated wooden structure seems forgiving probably less brittle seems io flex breaking main 1/ square longerons should matched closely possible grain stiffness hardness sometimes difficult use prestripped stock suggest build borrow buy balsa stripper cut own strips sheet stock Produce four good square-sided strips tag end can keep track came off sheet Pin plan heavy end nose YI6 sheet side panel should installed vertical uprights positioned shown diagonals added 62 Model Aviation king radio top type sold Jim Waiston light weight offers protection against loss Snuffer tube lower left extinguishes detilermalizer fuse Timer weighs eight grams handles engine shutoff far left VIT functions Pacifier mounted bottom makes wire skid unnecessary saves weight might find simple cutting jig shown helpful producing en masse minimum time effort Repeat companion side construct directly top just completed Remember diagonals side run opposite corners makes structure fully geodetic finished sides removed plan separated placed flat surface lightly block-sanded front back remove glue bumps other irregularities Carefully prepare A6 bulkheads six-pound balsa making sure cut accurately square corners Lay right-side structure flat building board glue bulkheads appropriate positions keeping vertical until set left side glued vertical bulkheads two positions time beginning F-l back F-3 watching make sure everything kept aligned true Lift basic fuselage frame building board drop glue forward fuselage bottom panels grain long way top panel cross-grain Install cross-members diagonals F-3 forward let everything set least hour Bring fuselage sides together rear before gluing cut former F-4 width retain curvature have chosen satisfied sighted symmetrical appearance glue everything together install top bottom braces followed diagonals front firewall 1/8 plywood engine mounting method will depend power plant selected can probably purchase machined radialmount adapter ring replaces engine backplate greatly simplifying problem Blind mounting nuts installed back side plywood accept ring firewall slow-cure epoxied place fuselage thrust offsets shown plan 1/2A Gas 1989 USOC 1990 Nats 1991 Nats 1993 Nats 1994 Nats 1995 Nats 1996 Nats 1997 Nats Fl J 1995 Nats 1996 Nats 1997 Nats 5th265 2nd265 2nd300 4th300 1st265 4th300 1st300 2nd300 2nd 2nd 1st 300 300 300 Cox ID 049 Cox TD049 Shuriken 05 Shuriken 05 Stels 049 Shuriken 05 VIT Shuriken 05 VIT Shuriken 05 VII Shuriken 05 VII Shuriken 05 VII Shuriken 05 VII July1998 63 Music wire Variable Incidence Tailpiane VIT arm allows fine-tuning climb glide settings best performance Power position shown w Type FF /2A-FlJ Wingspan 53 inches Engine 05-06 Flying weight 675-75 ounces Construction Built-up Covering/finish Japanese tissue dope VIT arm pivots rearward allow stab pop up DT Limit line holds stab proper angle floating descent 4-40 screw used adjust incidence Full-Size Plans Availablesee page 181 II 0 z33 F0 3 303 00 3o i-I 330 00 033 3 3 3- 30 I33 0 F-0 33 33 333 33333 V3330 330 ~.oo33 3t000 FI 33333333 I-I 0 F3 I-3 I-FTh I3 33 IFIIN 0II 3 0I I-I 033333 I-Fil/ / A-.- jI F .r~IF I3 30 FI0I3l 3 - 33 000 3 3 3 3 33 033 0F-0/033X ~FF /03 33 F I0 F-330F F3333333 103 F3/ 3 F F30/ 3033\ 0 I / FF-33... 3333\3F 3/33 IF033 I33303333 0033 33 /F 333 3333 IF -3.3/ F3 F333-\F F3F F-3/ F- 0/ 3F F~ F-I03 333iii3 333g/133\\ 330 I/I~A 333-3/1~/0 -/0 3.-.0\ /3333 3\/33 /3 L13 3333/33333 033 /003 F-03 uiE330/30 333/330333 333333-333 F F 3 F F F-0Iii/ 3F0FF 3333 \\ Ji ~rtK2 ~ - %\$F33IF F F iiI34J1K 333 33 3 33 333 %% 30 00 0 033 3F 33333 330 0 -30 0 033 3333 00 03 3/ 300 330 IF 33 33333 -F333003 /3 3F-33 33 3-0003 F-3333-F-003 333330 333—Z0F-3333 3300330033330 *033 33333F31*0 OF0 333303 3333333333 333 330 03333 0333333 033333 3300030033 003333 033303333 000333 33 0 64 Model Aviation 333 33 33 33333 3303 333 33333 33301 II K 2 33 F ji r JO 333 03 -33- lack landing skid oversight has found unnecessary good place save several grams valuable weight /te sheet rudder should no problem assemblejust keep grain direction shown Sand symmetrical airfoil section dont overlook 1/16 square stiffener insert rudder extends through fuselage bottom sheet until makes good solid contact top sheet final-gluing close attention should paid perpendicularity neutral alignment Timer I have used modified Tomy timers engine cutoff VIT activation small power models years find very reliable run steadily minimally affected engine vibration also tolerate reasonable amount disc loading believe timer malfunctions centered around pilot errornot activating start button incorrect disc positioning wrong line hookups etc happen everyone manufacturer toys continually introduces new figures have different articulations shaft takeoffs accommodate animation required never know until disassembly whether toy will suited application However fortunate stumble across Tomy motorboat attributes required purchased dozen am going elaborate modification procedure several good articles have published US British magazines Attention should brought Tomys eight-gram finished weight $2 cost enjoyment received gyrations prior loboTomy crossover wire system makes unnecessary slow down pawl thereby reducing chance stalling action happens end result total disaster Balsa Building Board smooth surface is3 Sizes excellent pining parts available place gluing together Pieces cut cross grain end wood grain makes up surface allows multiple cuts surface crumbling Board slightly flexible Price includes S & H MI residents add 6% sales tax will conform table topSorry no orders outside continenlal U S #24 24V#3636~1#48 O734-434-8928 D0VF4lA@Prodigycom PO Box 178 Check money Milan MI 48160 order T-ON Davis Diesel Heads Over 101 models 04936 ci OWEN Wadis krgest prodeur Model Diesel Feels LESS HASSIEYMORE FUN Dieselize Davis Diesel Its Awesome * Up 50% Power Easy Starting Sk1S4J No Glow Plugs Jlvice Long * Scale Sound DAVIS P0 Box 141 DeMA MODEL PRODUCTS complete rmation packet send $400 credit applied first order 1120 Wrigley Way Milpitas California 95035 Voice/Fax 408 946-4751 408 WINGS-51 LOOK no further fully molded sailplane needs RnR offer selection high performance sailplanes will address specific requirements F3BThermal Duration Slope Cross Country Mark Allen designed World Championship F3B EAGLE now being produced RnR its new lower price RnR sailplane enjoys design construction enhancements 1997 RnRs composite molded technology provides unique blend strength weight optimization Noticeable results found through increased durability torsional stability stiffness incorporated wing fuselage tail section also offer selection parts joiner systems scratch builders out catch latest visuals specifications competitive pricing RnRs sailplanes contact RnR RnR skys limit. July1998 65 PRODUCTS NE tachometer Used Dave Patrick OC Teau Easterday Sill Ileaupel M144C/Made*a Cheapieu Doug Creakkite C1 e, Radio Specfrtim FEATURES Auto shut-off Surperb Accuracy Ergonomic design Display x 10 RPM Large LCD display Reads 2 3 4 blades RPM range 10 99990 Advance touch control 9 Volt battery included Available local hobby shop call us number below will need bring another load balsa dont want try luck Tomy purchase Texas Timer Mini Seelig four-function /2A timer Both dependable require no modification weigh 16-20 grams Regardless line hookups will require some improvisation depending run lines internally externally choose VIT locked-up Just dont forget 9-12-gram weight penalty rides along flight Pylon The wing pylon best built halves Prepare /s x ing trailing edges /s plywood holddown inserts epoxied place Three pylon ribs cut A2 balsa sheet two cut half long direction match-marked Pin LE TE pieces plan glue bottom middle half-ribs Remove plan attach companion half-ribs full top rib 1/6 square vertical stiffener fitted place glued sides A2 sheet added edges trimmed As sheet wing platform pieced together cut length width 1/16 x Vs hard edge runners added completed platform glued pylon attention being paid alignment part put aside until other components completed airplane completely assembled locate pylon CG 66% chord Wing The wing constructed separate panels care should taken choose wood somewhere near density grain indicated accurate gram scale helps A6 plywood cutting template should made center panel rib W- 1 helpful push straight pins through template two positions just barely protruding CyA place pins ensure template stays put slicing ribs light As C-grain balsa sheet Locate spar notches during operation trailing edge chosen wrapfree medium-weight x p stock WATER JET CUT CARBON FIBER STRIPS Latest Technology No Sanding Necessary Smooth Edges Great Spar Caps Precision Cut Strips Foam Wing Reinforcement Bondable Surf eces Lowest Prices CLi 1007 Thick l/Cx48 2/pkgl S315 3/8n48 2 pkgl S350 CL2I014Thkkl 1/4x46 2/phg S400 3/8x48 12 pkgl S415 CL3 1022 Thick 1/4x4812/pkgS500 3/8x4812 phg SA15 CL4 1030 Thick 1/4x48 2/pkgl SAtO 3/8x48 2 pkg S900 Send SASE information additional sizes products Add $500 shipping handlinq Calif residents odd 825% tax Overseas orders add 15% OrderCOD MCI VISA send check money order Aerospace CompositeProducts 1 4210 DOOLITILt Ot SAN LEANDRO CA 94577 352-2022 FAX 510 3522021 rib inset notches located cut Dremel scroll saw /is deep insets greatly strengthen rib attachment point should tight fit rib TE has very slight taper conform top camber slope sanding block mini razor-plane will job careful Dont let blunt trailing edge construction turn off have used construction power models Mulvihills cant tell difference performance compared full taper Windtunnel tests show top surface air flow has turbulated broken away long before reaching point wing blunt construction no disadvantage Just try think might like Weight consideration better wood selection other reasons choice Pin LE TE /s square bottom spar plan lay full straight ribs As vertical shear webs installed flush back edge bottom spar half-ribs installed followed /s square top spar Cut diagonal ribs C-grain sheet install Omit rear spar notches can located accurately later after panels joined tip panels similar construction main panels except As x diagonals used between full straight ribs crossover point diagonals should glued rear spar crossover doesnt touch spar gap must bridged short lengths scrap balsa glued points add integrity part wing provide considerable torsional stiffness preventing high-speed flutter twisting completed panels prepared polyhedral carefully trimming sanding LE TE main spars slow tedious job abutments must tight fit touching points Epoxy used overlapping /A plywood braces Since TE does have large gluing area small /64 plywood keepers imbedded strengthen critical juncture carving LE shape introduce small 66 Model Aviation rt *ircra ft us sw dIt,bute w 107 EDWARD AVE FULLERTON CA 92833 tnfo7t4 680-5858 Fax7t468t3-5550 DEALERS INQUIRiES WELCOME amount /32 inch Phillips entry bottom side other bits pieces can now added including TE wing rubber plywood reinforcement LE balsa fill slanted 3A2 tip ribs whole structure should sanded smooth prepared covering Stabilizer The construction similar wing except trailing edge constructed L-shaped cross-section using A6 X /8 medium balsa Light wood should used throughout target finished weight should 9-1 1 grams Construct install stab mount slight amount left turn tilt /l6 inch should visible translates left tip being high viewed rear Covering/Finish Japanese tissue recommended covering material Chugger principally because its light weight tautness structures edges contact covering should given coat unthinned butyrate dope lightly sanded 200-grit paper remove fuzz raised grain Tissue applied same dope sprayed water tighten Two coats thinned clear dope applied flying surfaces boom portion fuselage bottom side first three inboard bays wing double-covered tissue watershrunk doped spray coat colored epoxy paint applied front fuselage starting just behind pylon provides additional protection against deterioration fuel spray handling slight amount /32 less washout trailing edge high viewed rear should introduced tip panels holding position until dope has dried Over-tweaking generally needed since will tendency structure return its original shape hopefully 1/16 washout will retained same method used apply /s washin right main wing panel tweaking-and-holding procedure repeated subsequent occasions recovering doping large areas required normal maintenance have successful building-in subtle wing warps open-structured surfaces find best induced during covering operation Check intentional warps periodically especially damp conditions before making competition flights Preflight Before proceeding flying field important complete detail work prove-out various flight systems make sure everything functioning properly wing keyed short lengths square balsa resulting slide fit wing platform center gravity CG can now located within range 62-66% wing chord fuselage ballasted lead make corrections safe CC should rearward 66% point flight adjustments could become complicated difficult diagnose correct especially important ascertain VIT/engine cutoff timer disc overloaded point will run steadily must able withstand sufficient rubber band tension keep stab firmly seated power mode sure fuel pinchoff mechanism Reid Simpson gadget located close proximity engine needle valve closes shut authority foolproof last check done engine running course same time can observe rotational speed timer disc mark three-second location first test flights maiden test hop should preceded test-gliding over high grass stab glide position prop removed optimum glide slight left bank no tendency stall Correct stall dive deftly adjusting wire VIT arm using needle-nose pliers adding /64 plywood shims stab top bottom rub plates establish initial power setting lower stab TE about 1 /2 turns 440 adjusting screw Never fly fuse take care matter cutting CONVENIENT WAY TO HOLD AND SUPPORT YOUR PLANE Sturdy steel tube construction Protective padded uprightsl EASY ON YOUR BACK NO NEED TO BEND OVER WHILE ASSEMBLING MODEL Sturdy steel tube construction Supports up 55 lbs weight Available Now Contact favorite hobby supplier pricing INC 400 S Indiana St PO Box 564 Hobart IN 46342 800 348-3497 EMaiI kits@midwestpmductscom July1998 67 KEEPS YUUH KNLL ULAN AND COMFORTABLE LargelO5 x 22 pad Water resistant FAIL SAFES RAM has originated fail safes other R/C manufacturer Check out latest versions local hobby shop send stamped 1 0 envelope full info RAM 09BATTERY BACKER redundant baft syst up 60 size model$3995 RAM 11LOW BATTERY ALARM audio visual 48V 96V2495 RAM 12LOW FUEL LIGHT glo fuel monitor visible flight1995 RAM 17LOST PLANE FINDER Mk Il 65 DB 50 battery2495 RAM 18BIG AIRPLANE RF DE-GLITOHER SYSTEM replaces 10 chokes895 RAM 22SIMPLE CYCLER discharges 48V & 96V batt up 600 MA1995 RAM 25BIG PLANE BATTERY BACKER 10 amp cap w/2 switch harnesses5995 RAM 26BIG BATTERY CYCLER discharges 48V baIt up 4000 MA2495 RAM 49IGNITER 800 MA board driver/starter 20 & 21 engine4995 RAM 50IGNITER 1300 MA board driver/starter 35 & up engine4995 RAM 62SERVO FAIL SAFE adj sate point & delay waterproo fable2495 RAM 83RADIO SIGNAL WATCH DOG Provides 4 functions 1/2 oz1495 unavailable locally send check money order full credit card info cost item plus $400 l$500 foreignl immediate shipment Include full address UPS Sorry no COD ~am 229E E Rollins Rd d Lake BeaCh IL 60073 Introducing 30 Wingspan Laser Cut Rubber Powered Flying Models #301 Over 80 LASER CUT PARTS Kit #302 Over 70 LPARTS Kit #303 Over 75 LASER CUT PARTS good thing just got bigger expanding line airplanes addition new 30 wingspan laser cut kits Like walnut series line geared toward exciting subject matter captures best model aviation has offer Besides offering cleanest laser cuts comprehensive plans free flight kit provide following quality features I-land Selected Balsa Color Peel & Stick Decal Set 9 Plastic Propeller Full Size Plan FAI Tan II Rubber Step Step Instructions Vacuum Molded Parts Light Weight Colored Tissue Call today 1-800-458-2828 Ext 800 ask information packet Dumas line Rubber Powered Flying Models dumas aircraft DUMAS PRODUCTS INC 9O9AMA E 17th St Tucson AZ 85719 Phone 520-623-3742 Fax 520-620-1329 E-MAIL dumas@azstarnetcom installing short fuse has end charred easy lighting Set engine timer no three seconds Start engine needle nearly full power using mild fuel 30% nitru Light fuse gently launch Chugger straight up keeping wings level should accelerate rapidly nearly vertical right spiral should about 200 feet high engine cuts Hopefully will get glimpse glide before DT correct dive stall adjusting wire VII arm Chugger headed vertical loop under power overelevated stab adjustment screw should lowered /2 turn depending upon severity maneuver power pattern flat arcs over toward ground underelevated raise screw -Y2 turn glide circle adjusted stab tilt approximately 150 feet diameter power turn adjusted making small changes rudder tab cant emphasize enough much effect changes magnified during highspeed climb engine thrust offsets have built correctly no adjustments should required long engine runs observe gentle left roll conjunction right turn no problem long does become excessive right wing washin becomes effective high speed causing lift against right turn induced prop wash impinging pylon underslung rudderall keeping nose up during climb As climb glide pattern optimized gradually increase fuel nitro engine run up seven seconds longer gliding flights can observed before DI may take dozen flights test session Chugger should close being ready hit contest circuit Flyoff Tactics presumptuous believe Chugger others should capable consistently making AMA Cat III seven-second engine run two-minute-max flights another matter however consistently successful four-second engine-run 2/2-minute max reach plateau observations careful attention details required prior official flight ground- possibly air- check engine run should performed second attempts allowed Backing-off engine timer recommended allow sound travel timekeeper reaction delays lime management also comes play since toward days end often two three fliers left Few airplanes short engine runs being flown late may have rely other means bubbles streamers thermistors observe monitor air quality Flyoff flights commonly take place waning houi-s meet air cooling time running out flight behind less hour remains might consider assembling backup model flights can put up rapid succession Just act preparing second airplaneeven competitivecan sometimes create panic cause opposition rush pick bad air Hopefully can take advantage move aheaddesperate measures desperate times Round up some chasing help can remain flightline get airbome again FIJ flying format completely different rounds first five flights progressively longer maxes flyoff Under certain weather conditions long flights introduce timers eyesight equation always supply timer good pair binoculars Ask him acquaint himself strongly suggest focus well advance airplane disappearing event ask him spot airplane down mark line terrain feature hope build Lil Chugger paths will cross some future competition please introduce yourself relate experiences design have questions want confer building question please contact Robert Dunham II Box 904066 Tulsa OK 74105 -ss Antiques Military Civrlion Helicopters Sailplanes2 hove worlds largest airrult documentation collection 7000 different full color photo studies 1903-1997 1998 C 350003 view line drawings ulde 200 pose JYQe ea $500 OflIv8OO Canada -Bob Banka e Research -enue a Mesa CA 92626 7141 979-8058 http //www mt net ms/scaie htmi 68 Model Aviation

T Lii Chugger no new kid block having flown several configurations since 1988 competition Free Flight airplane developed AMA 1/2A classes FAJ FlJ easily constructed proven winner Nats level competition F 265 300 sizes Variable Incidence Tailplane VIT Chugger 300 Mk II evolved first-generation Chugger 265 originally built 1988 based Gil Morris Matchsticks construction simplified conventional building materials employed Cox TD 049 engine used time flying surfaces MylarTM covered led inconsistencies power patternno doubt because wing flex MylarTM Photos author Graphic Design Carla Kunz removed replaced tissue-and-dope solved problem have used tissue small power models ever since After covering swapout airplane placed high 1989 90 Nats fifth second introduction more-powerful Shuriken engine required design update 1991 wing area increased 265 square inches 300 lengthened tail moment smaller stab enabled comfortably handle increased power glide also improved airplane subsequently lost 1993 Nats after encountering some super lift seen dethermalize DT never found Flights finished 265 backup ended up fourth place 1994 Lubbock Nats six-year-old plain-vanilla Chugger 265 retrofitted Stels 049 again brought out semiretirement posted five maxes downer somewhat iffy weather capture first win Open 1/2A class Left The author Chugger Nats-winning design has thoroughly tested sized optimize available power 60 Model Aviation onal Free Flight So7md Power Year U Robert Dunham II Above Ready launch Robert about pull release pin modified Tomy timer Built-up tailboom no problem current version sports easily formed music-wire ViT 1/2 gram operated customized Tomy engine cutoff timer improvement climb angle speed impressive bonus being able independently fine-tune glide setting wing aspect ratio increased diagonals added wing stab make surfaces torsion-resistant 300 Mk II VIT best Chuggers date confirmed winning Gas placing second F1J 1996 Nats reversing positions 1997 potential winner FlJ against very tough competition Free Flighters composite materials construction methods hope others will attracted Chugger-type modelsnot sophisticated proven ability successfully compete against so-called high-tech competition big plus stick-and-tissue construction modus operandi average modeler gather up lumber parts required hobby shop morning start chips flying aftemoon actually become builder model instead assembler good reliable steady running 05 06 engine must will no need purchase often-expensive long-delivery cottage-industry parts such machined pans carbon tailbooms VIT/bunt hardware elevator saddle folding prop formed composite leading edges etc Instead might look investing good locator system could come very handy Chugger finds some really good lift all-up flying weight 300 Mk II complete VIT should 675 75 ounces weight range very attainable build carefully watch wood selection covering material finish time have chosen employ bunt method transition depend light weight modest-but-adequate wing aspect ratio forward balance point help make transition go smoothly features assist transition critical short engine runs allowed deciding late rounds am antibunt good bunt pretty watch untimely misfire can bring string maxes screeching halt hurry Good air-picking necessity no matter what design features happen beand therein often lurks thin line separation between fliers CONSTRUCTION Spend couple evenings studying plans going scratch-build project although its difficult should have some previous knowledge working balsa structures should have built several similarly constructed models have good Cox TD AME 049 wish use take 300 plan copy shop have make print using 5% reduction factor cost will minimal result will 265-squareinch flat wing plan everything else proper proportion Wood sizes remain same finished weight combination should exceed 625 ounces use Duco cement primary glue balsa construction because its lightness repairability plus its brittle sands well Cyanoacrylate CyA glues epoxies have applications heavily fuel-wetted areas used sparingly However quick-fix field repairs CyA can best friend Fuselage skeptics about merits stick-and-tissue tailbooms can say four Chuggers have logged several hundred flights has boom broken reason Small lightly loaded power models descend slowly DT mode land much fuss fabricated wooden structure seems forgiving probably less brittle seems io flex breaking main 1/ square longerons should matched closely possible grain stiffness hardness sometimes difficult use prestripped stock suggest build borrow buy balsa stripper cut own strips sheet stock Produce four good square-sided strips tag end can keep track came off sheet Pin plan heavy end nose YI6 sheet side panel should installed vertical uprights positioned shown diagonals added 62 Model Aviation king radio top type sold Jim Waiston light weight offers protection against loss Snuffer tube lower left extinguishes detilermalizer fuse Timer weighs eight grams handles engine shutoff far left VIT functions Pacifier mounted bottom makes wire skid unnecessary saves weight might find simple cutting jig shown helpful producing en masse minimum time effort Repeat companion side construct directly top just completed Remember diagonals side run opposite corners makes structure fully geodetic finished sides removed plan separated placed flat surface lightly block-sanded front back remove glue bumps other irregularities Carefully prepare A6 bulkheads six-pound balsa making sure cut accurately square corners Lay right-side structure flat building board glue bulkheads appropriate positions keeping vertical until set left side glued vertical bulkheads two positions time beginning F-l back F-3 watching make sure everything kept aligned true Lift basic fuselage frame building board drop glue forward fuselage bottom panels grain long way top panel cross-grain Install cross-members diagonals F-3 forward let everything set least hour Bring fuselage sides together rear before gluing cut former F-4 width retain curvature have chosen satisfied sighted symmetrical appearance glue everything together install top bottom braces followed diagonals front firewall 1/8 plywood engine mounting method will depend power plant selected can probably purchase machined radialmount adapter ring replaces engine backplate greatly simplifying problem Blind mounting nuts installed back side plywood accept ring firewall slow-cure epoxied place fuselage thrust offsets shown plan 1/2A Gas 1989 USOC 1990 Nats 1991 Nats 1993 Nats 1994 Nats 1995 Nats 1996 Nats 1997 Nats Fl J 1995 Nats 1996 Nats 1997 Nats 5th265 2nd265 2nd300 4th300 1st265 4th300 1st300 2nd300 2nd 2nd 1st 300 300 300 Cox ID 049 Cox TD049 Shuriken 05 Shuriken 05 Stels 049 Shuriken 05 VIT Shuriken 05 VIT Shuriken 05 VII Shuriken 05 VII Shuriken 05 VII Shuriken 05 VII July1998 63 Music wire Variable Incidence Tailpiane VIT arm allows fine-tuning climb glide settings best performance Power position shown w Type FF /2A-FlJ Wingspan 53 inches Engine 05-06 Flying weight 675-75 ounces Construction Built-up Covering/finish Japanese tissue dope VIT arm pivots rearward allow stab pop up DT Limit line holds stab proper angle floating descent 4-40 screw used adjust incidence Full-Size Plans Availablesee page 181 II 0 z33 F0 3 303 00 3o i-I 330 00 033 3 3 3- 30 I33 0 F-0 33 33 333 33333 V3330 330 ~.oo33 3t000 FI 33333333 I-I 0 F3 I-3 I-FTh I3 33 IFIIN 0II 3 0I I-I 033333 I-Fil/ / A-.- jI F .r~IF I3 30 FI0I3l 3 - 33 000 3 3 3 3 33 033 0F-0/033X ~FF /03 33 F I0 F-330F F3333333 103 F3/ 3 F F30/ 3033\ 0 I / FF-33... 3333\3F 3/33 IF033 I33303333 0033 33 /F 333 3333 IF -3.3/ F3 F333-\F F3F F-3/ F- 0/ 3F F~ F-I03 333iii3 333g/133\\ 330 I/I~A 333-3/1~/0 -/0 3.-.0\ /3333 3\/33 /3 L13 3333/33333 033 /003 F-03 uiE330/30 333/330333 333333-333 F F 3 F F F-0Iii/ 3F0FF 3333 \\ Ji ~rtK2 ~ - %\$F33IF F F iiI34J1K 333 33 3 33 333 %% 30 00 0 033 3F 33333 330 0 -30 0 033 3333 00 03 3/ 300 330 IF 33 33333 -F333003 /3 3F-33 33 3-0003 F-3333-F-003 333330 333—Z0F-3333 3300330033330 *033 33333F31*0 OF0 333303 3333333333 333 330 03333 0333333 033333 3300030033 003333 033303333 000333 33 0 64 Model Aviation 333 33 33 33333 3303 333 33333 33301 II K 2 33 F ji r JO 333 03 -33- lack landing skid oversight has found unnecessary good place save several grams valuable weight /te sheet rudder should no problem assemblejust keep grain direction shown Sand symmetrical airfoil section dont overlook 1/16 square stiffener insert rudder extends through fuselage bottom sheet until makes good solid contact top sheet final-gluing close attention should paid perpendicularity neutral alignment Timer I have used modified Tomy timers engine cutoff VIT activation small power models years find very reliable run steadily minimally affected engine vibration also tolerate reasonable amount disc loading believe timer malfunctions centered around pilot errornot activating start button incorrect disc positioning wrong line hookups etc happen everyone manufacturer toys continually introduces new figures have different articulations shaft takeoffs accommodate animation required never know until disassembly whether toy will suited application However fortunate stumble across Tomy motorboat attributes required purchased dozen am going elaborate modification procedure several good articles have published US British magazines Attention should brought Tomys eight-gram finished weight $2 cost enjoyment received gyrations prior loboTomy crossover wire system makes unnecessary slow down pawl thereby reducing chance stalling action happens end result total disaster Balsa Building Board smooth surface is3 Sizes excellent pining parts available place gluing together Pieces cut cross grain end wood grain makes up surface allows multiple cuts surface crumbling Board slightly flexible Price includes S & H MI residents add 6% sales tax will conform table topSorry no orders outside continenlal U S #24 24V#3636~1#48 O734-434-8928 D0VF4lA@Prodigycom PO Box 178 Check money Milan MI 48160 order T-ON Davis Diesel Heads Over 101 models 04936 ci OWEN Wadis krgest prodeur Model Diesel Feels LESS HASSIEYMORE FUN Dieselize Davis Diesel Its Awesome * Up 50% Power Easy Starting Sk1S4J No Glow Plugs Jlvice Long * Scale Sound DAVIS P0 Box 141 DeMA MODEL PRODUCTS complete rmation packet send $400 credit applied first order 1120 Wrigley Way Milpitas California 95035 Voice/Fax 408 946-4751 408 WINGS-51 LOOK no further fully molded sailplane needs RnR offer selection high performance sailplanes will address specific requirements F3BThermal Duration Slope Cross Country Mark Allen designed World Championship F3B EAGLE now being produced RnR its new lower price RnR sailplane enjoys design construction enhancements 1997 RnRs composite molded technology provides unique blend strength weight optimization Noticeable results found through increased durability torsional stability stiffness incorporated wing fuselage tail section also offer selection parts joiner systems scratch builders out catch latest visuals specifications competitive pricing RnRs sailplanes contact RnR RnR skys limit. July1998 65 PRODUCTS NE tachometer Used Dave Patrick OC Teau Easterday Sill Ileaupel M144C/Made*a Cheapieu Doug Creakkite C1 e, Radio Specfrtim FEATURES Auto shut-off Surperb Accuracy Ergonomic design Display x 10 RPM Large LCD display Reads 2 3 4 blades RPM range 10 99990 Advance touch control 9 Volt battery included Available local hobby shop call us number below will need bring another load balsa dont want try luck Tomy purchase Texas Timer Mini Seelig four-function /2A timer Both dependable require no modification weigh 16-20 grams Regardless line hookups will require some improvisation depending run lines internally externally choose VIT locked-up Just dont forget 9-12-gram weight penalty rides along flight Pylon The wing pylon best built halves Prepare /s x ing trailing edges /s plywood holddown inserts epoxied place Three pylon ribs cut A2 balsa sheet two cut half long direction match-marked Pin LE TE pieces plan glue bottom middle half-ribs Remove plan attach companion half-ribs full top rib 1/6 square vertical stiffener fitted place glued sides A2 sheet added edges trimmed As sheet wing platform pieced together cut length width 1/16 x Vs hard edge runners added completed platform glued pylon attention being paid alignment part put aside until other components completed airplane completely assembled locate pylon CG 66% chord Wing The wing constructed separate panels care should taken choose wood somewhere near density grain indicated accurate gram scale helps A6 plywood cutting template should made center panel rib W- 1 helpful push straight pins through template two positions just barely protruding CyA place pins ensure template stays put slicing ribs light As C-grain balsa sheet Locate spar notches during operation trailing edge chosen wrapfree medium-weight x p stock WATER JET CUT CARBON FIBER STRIPS Latest Technology No Sanding Necessary Smooth Edges Great Spar Caps Precision Cut Strips Foam Wing Reinforcement Bondable Surf eces Lowest Prices CLi 1007 Thick l/Cx48 2/pkgl S315 3/8n48 2 pkgl S350 CL2I014Thkkl 1/4x46 2/phg S400 3/8x48 12 pkgl S415 CL3 1022 Thick 1/4x4812/pkgS500 3/8x4812 phg SA15 CL4 1030 Thick 1/4x48 2/pkgl SAtO 3/8x48 2 pkg S900 Send SASE information additional sizes products Add $500 shipping handlinq Calif residents odd 825% tax Overseas orders add 15% OrderCOD MCI VISA send check money order Aerospace CompositeProducts 1 4210 DOOLITILt Ot SAN LEANDRO CA 94577 352-2022 FAX 510 3522021 rib inset notches located cut Dremel scroll saw /is deep insets greatly strengthen rib attachment point should tight fit rib TE has very slight taper conform top camber slope sanding block mini razor-plane will job careful Dont let blunt trailing edge construction turn off have used construction power models Mulvihills cant tell difference performance compared full taper Windtunnel tests show top surface air flow has turbulated broken away long before reaching point wing blunt construction no disadvantage Just try think might like Weight consideration better wood selection other reasons choice Pin LE TE /s square bottom spar plan lay full straight ribs As vertical shear webs installed flush back edge bottom spar half-ribs installed followed /s square top spar Cut diagonal ribs C-grain sheet install Omit rear spar notches can located accurately later after panels joined tip panels similar construction main panels except As x diagonals used between full straight ribs crossover point diagonals should glued rear spar crossover doesnt touch spar gap must bridged short lengths scrap balsa glued points add integrity part wing provide considerable torsional stiffness preventing high-speed flutter twisting completed panels prepared polyhedral carefully trimming sanding LE TE main spars slow tedious job abutments must tight fit touching points Epoxy used overlapping /A plywood braces Since TE does have large gluing area small /64 plywood keepers imbedded strengthen critical juncture carving LE shape introduce small 66 Model Aviation rt *ircra ft us sw dIt,bute w 107 EDWARD AVE FULLERTON CA 92833 tnfo7t4 680-5858 Fax7t468t3-5550 DEALERS INQUIRiES WELCOME amount /32 inch Phillips entry bottom side other bits pieces can now added including TE wing rubber plywood reinforcement LE balsa fill slanted 3A2 tip ribs whole structure should sanded smooth prepared covering Stabilizer The construction similar wing except trailing edge constructed L-shaped cross-section using A6 X /8 medium balsa Light wood should used throughout target finished weight should 9-1 1 grams Construct install stab mount slight amount left turn tilt /l6 inch should visible translates left tip being high viewed rear Covering/Finish Japanese tissue recommended covering material Chugger principally because its light weight tautness structures edges contact covering should given coat unthinned butyrate dope lightly sanded 200-grit paper remove fuzz raised grain Tissue applied same dope sprayed water tighten Two coats thinned clear dope applied flying surfaces boom portion fuselage bottom side first three inboard bays wing double-covered tissue watershrunk doped spray coat colored epoxy paint applied front fuselage starting just behind pylon provides additional protection against deterioration fuel spray handling slight amount /32 less washout trailing edge high viewed rear should introduced tip panels holding position until dope has dried Over-tweaking generally needed since will tendency structure return its original shape hopefully 1/16 washout will retained same method used apply /s washin right main wing panel tweaking-and-holding procedure repeated subsequent occasions recovering doping large areas required normal maintenance have successful building-in subtle wing warps open-structured surfaces find best induced during covering operation Check intentional warps periodically especially damp conditions before making competition flights Preflight Before proceeding flying field important complete detail work prove-out various flight systems make sure everything functioning properly wing keyed short lengths square balsa resulting slide fit wing platform center gravity CG can now located within range 62-66% wing chord fuselage ballasted lead make corrections safe CC should rearward 66% point flight adjustments could become complicated difficult diagnose correct especially important ascertain VIT/engine cutoff timer disc overloaded point will run steadily must able withstand sufficient rubber band tension keep stab firmly seated power mode sure fuel pinchoff mechanism Reid Simpson gadget located close proximity engine needle valve closes shut authority foolproof last check done engine running course same time can observe rotational speed timer disc mark three-second location first test flights maiden test hop should preceded test-gliding over high grass stab glide position prop removed optimum glide slight left bank no tendency stall Correct stall dive deftly adjusting wire VIT arm using needle-nose pliers adding /64 plywood shims stab top bottom rub plates establish initial power setting lower stab TE about 1 /2 turns 440 adjusting screw Never fly fuse take care matter cutting CONVENIENT WAY TO HOLD AND SUPPORT YOUR PLANE Sturdy steel tube construction Protective padded uprightsl EASY ON YOUR BACK NO NEED TO BEND OVER WHILE ASSEMBLING MODEL Sturdy steel tube construction Supports up 55 lbs weight Available Now Contact favorite hobby supplier pricing INC 400 S Indiana St PO Box 564 Hobart IN 46342 800 348-3497 EMaiI kits@midwestpmductscom July1998 67 KEEPS YUUH KNLL ULAN AND COMFORTABLE LargelO5 x 22 pad Water resistant FAIL SAFES RAM has originated fail safes other R/C manufacturer Check out latest versions local hobby shop send stamped 1 0 envelope full info RAM 09BATTERY BACKER redundant baft syst up 60 size model$3995 RAM 11LOW BATTERY ALARM audio visual 48V 96V2495 RAM 12LOW FUEL LIGHT glo fuel monitor visible flight1995 RAM 17LOST PLANE FINDER Mk Il 65 DB 50 battery2495 RAM 18BIG AIRPLANE RF DE-GLITOHER SYSTEM replaces 10 chokes895 RAM 22SIMPLE CYCLER discharges 48V & 96V batt up 600 MA1995 RAM 25BIG PLANE BATTERY BACKER 10 amp cap w/2 switch harnesses5995 RAM 26BIG BATTERY CYCLER discharges 48V baIt up 4000 MA2495 RAM 49IGNITER 800 MA board driver/starter 20 & 21 engine4995 RAM 50IGNITER 1300 MA board driver/starter 35 & up engine4995 RAM 62SERVO FAIL SAFE adj sate point & delay waterproo fable2495 RAM 83RADIO SIGNAL WATCH DOG Provides 4 functions 1/2 oz1495 unavailable locally send check money order full credit card info cost item plus $400 l$500 foreignl immediate shipment Include full address UPS Sorry no COD ~am 229E E Rollins Rd d Lake BeaCh IL 60073 Introducing 30 Wingspan Laser Cut Rubber Powered Flying Models #301 Over 80 LASER CUT PARTS Kit #302 Over 70 LPARTS Kit #303 Over 75 LASER CUT PARTS good thing just got bigger expanding line airplanes addition new 30 wingspan laser cut kits Like walnut series line geared toward exciting subject matter captures best model aviation has offer Besides offering cleanest laser cuts comprehensive plans free flight kit provide following quality features I-land Selected Balsa Color Peel & Stick Decal Set 9 Plastic Propeller Full Size Plan FAI Tan II Rubber Step Step Instructions Vacuum Molded Parts Light Weight Colored Tissue Call today 1-800-458-2828 Ext 800 ask information packet Dumas line Rubber Powered Flying Models dumas aircraft DUMAS PRODUCTS INC 9O9AMA E 17th St Tucson AZ 85719 Phone 520-623-3742 Fax 520-620-1329 E-MAIL dumas@azstarnetcom installing short fuse has end charred easy lighting Set engine timer no three seconds Start engine needle nearly full power using mild fuel 30% nitru Light fuse gently launch Chugger straight up keeping wings level should accelerate rapidly nearly vertical right spiral should about 200 feet high engine cuts Hopefully will get glimpse glide before DT correct dive stall adjusting wire VII arm Chugger headed vertical loop under power overelevated stab adjustment screw should lowered /2 turn depending upon severity maneuver power pattern flat arcs over toward ground underelevated raise screw -Y2 turn glide circle adjusted stab tilt approximately 150 feet diameter power turn adjusted making small changes rudder tab cant emphasize enough much effect changes magnified during highspeed climb engine thrust offsets have built correctly no adjustments should required long engine runs observe gentle left roll conjunction right turn no problem long does become excessive right wing washin becomes effective high speed causing lift against right turn induced prop wash impinging pylon underslung rudderall keeping nose up during climb As climb glide pattern optimized gradually increase fuel nitro engine run up seven seconds longer gliding flights can observed before DI may take dozen flights test session Chugger should close being ready hit contest circuit Flyoff Tactics presumptuous believe Chugger others should capable consistently making AMA Cat III seven-second engine run two-minute-max flights another matter however consistently successful four-second engine-run 2/2-minute max reach plateau observations careful attention details required prior official flight ground- possibly air- check engine run should performed second attempts allowed Backing-off engine timer recommended allow sound travel timekeeper reaction delays lime management also comes play since toward days end often two three fliers left Few airplanes short engine runs being flown late may have rely other means bubbles streamers thermistors observe monitor air quality Flyoff flights commonly take place waning houi-s meet air cooling time running out flight behind less hour remains might consider assembling backup model flights can put up rapid succession Just act preparing second airplaneeven competitivecan sometimes create panic cause opposition rush pick bad air Hopefully can take advantage move aheaddesperate measures desperate times Round up some chasing help can remain flightline get airbome again FIJ flying format completely different rounds first five flights progressively longer maxes flyoff Under certain weather conditions long flights introduce timers eyesight equation always supply timer good pair binoculars Ask him acquaint himself strongly suggest focus well advance airplane disappearing event ask him spot airplane down mark line terrain feature hope build Lil Chugger paths will cross some future competition please introduce yourself relate experiences design have questions want confer building question please contact Robert Dunham II Box 904066 Tulsa OK 74105 -ss Antiques Military Civrlion Helicopters Sailplanes2 hove worlds largest airrult documentation collection 7000 different full color photo studies 1903-1997 1998 C 350003 view line drawings ulde 200 pose JYQe ea $500 OflIv8OO Canada -Bob Banka e Research -enue a Mesa CA 92626 7141 979-8058 http //www mt net ms/scaie htmi 68 Model Aviation