Four-stroke Rooster

NO OCR TEXT NO OCR TEXT ing tn tarmac lOcal airport anoras USC 9000 VISW o ins struts ana manoing guar uumbiies Wing construction mixture foam open framework Otherwise structure buiitfrom baisa plywood four-stroke engine produces pleasing sound model prototype has evolved six other parasols over past five years has thoroughly tested no surprises Metal work hard us practice brings success sure have wasted lot 5/32 music wire Cabanes have kept simple letting lift struts some work system has tested other parasols biplanes great suc cess also contributes great flexi bility parasol configuration flier fly just fun flying guarantee Four-Stroke Rooster will rewarding project like show work might consider Turning flnai approach ianding model comfortabie winds upto 15 knots wing shown pians up 20-knotwinds smaiierwing see Cap-2 1 expect precision vintage-looking model flies true axial rolls slow graceful outside loops close ground surely get ones attention Fuselage basic sides balsa sheet doublers um balsa sheet Ply Lay out basic sides cut shape Build-up doublers cut shape Cut light ening holes doublers before gluing sides sure make right left side two identical ones Fit glue top bottom longerons doublers formers aft cockpit Tape pin sides gether true-up edges shape shown plans Cut out Bulkheads B through F attach triangular balsa Left i5 setup tne autnor uses tor streamer aropping Note cabane fitting its screw locking tab Suggestions made aerial tricks though imagInation limit Right Close-up tail group Balsa guard atthe skid front keeps out grass 28 Model Aviation model poised ready taxi out soun U OT TflU newer generation OT airpianes gets out 0 tne way Notice elephant ease aileron tips author cautions buiiden remove provide aerodynamic baiance permit use smali servo strips Cut out maple cabane mount blocks glue D E fit glue battery compartment floor Bulk head E Cut out maple landing gear blocks glue C E observing angle match belly sheeting mounted servos three-abreast under battery compartment access through utility hatch belly like way good point attach servo tray mounts E F True-up bulkhead edges 3 table saw possible important have square edges no building jig used square edges help achieving good alignment build box lay side inner surface upward level flat sur face glue penetration prick sides bulkhead positions pin such use old needle valve Attach B through F temporarily lay other side weights until bottom joints have cured Dont rush especially sides tend curl Glue top side next before glue sets square top bottom sides another Lay box belly-up over centerline bring ends together rear glue tail block sure keep sides vertical Still over centerline build-up fit G H natural curve sides Cut out Bulkhead temporarily fit position Make maple stabilizer rhis irnaumnury purn nuigni ecu sun cimma ugoura tour oaviousy piiot~ aireaaycoc seven iO see pictureespeciaiiy 180 accessory servo secondary release cisap ana iITt strut mouiig June1985 29 Enya 90 being given test run tne Dackyard prop just ticking over Pilot constructed open-cell blue foam clothes made paper towel material later finished enamel Hobbypoxy Featured model evolved six prototypes before mount block pine steerable skid block glue Bulkhead Glue Ply bottom plate drill aluminum tube bearing slightly flare tubing ends short taper punch Glue Bulkhead fuselage trueup edges sanding engine mounts made lumber yard maple together firewall Nose Block strong cradle engine formed Dont build lighter larger four-strokers need lot dampening About 10 downthrust used another area compromise want keep radio trim inverted flight reasonable off-angles must kept minimum Put 2 down 2 right feel better installing engine mounts may want consider type throttle control routing will use Engines carburetor near firewall difficult respect have running cable under beam mount front using 1 80 bellcrank back carburetor method also allows easy adjustment linkage After beams fit glue sheet balsa triplers under beams square up front end fit nose block made four laminations Lite Ply have better luck making nose block slightly oversize first get ting required engine clearances gluing place sanding off excess have disk sander use true-up belly Attach Ply belly sheeting back Bulkhead G like cut lightening holes everything am able save about 2 oz altogether way Ive known guys spend $100 lighter servos save much weight nitpicker may want cut holes belly sheeting before attaching Run controls rudder elevator next use Nyrods Sheet rest belly medium t balsa applied cross-grained have ac cess fuel-proof inside fuselage front back cockpit area Drill cabane shock strut mounting holes maple blocks visible Fit top formers cockpit forward sheet balsa like mold wet around something close fuselage shape put dry way valleys will form between formers Next fit formers sheeting rear top deck left V Left Assembly point takes less two minutes ieia equhpmeni K5I uumpu Inun u 11 .genuous way wing tached haif-gailon fuel will last day miserly four-stroker author has never considered using electric starter Right Landing gear shock strut needs no extension limiter asthe muslcwlre Vs recoil enough letthe strutexceed maxextension 30 Model Aviation Aileron servo access top camber wing well away engines fuel residue cover made old alumi num printing plate simulates gas tank DUMMY ENGI NE BALSA 8 PLY 90 FOUR CYCLE MAPLE ENGINE MOUNTS 7 SHEET BALSA 7RABLE Al L SKID FOAM 7 STRUCTURAL 7 77 7----5/8 x 1/4 SPRUCE \FOR 10-32 NYLON BOLT CAP STRIPS r J1 X 1 //~ 1/8 x 3/8 BALSA RIBS -I 6-32 NYLON.II SCREWS 1/2 x 3/8 BALSA SPRUCEFRAME HARD POINT 3/32 BALSA 3/16 SHEET BALSA x 15/16 BALSA SPAR # STROKE ROOSTILI BILL DICKEY jiI DOOR CK 1/4 LITE PLY MUSICr SPRING STRUT ACCESS BALSAWIRE 1/8 BALSA1/8 LITE P TYPICAL WHEELS -I H DOWEL HARD POINT 7N 1/2 x 3/8 BALSA N 1/16 BALSA SHEET-1/4 BALSA 1/2 x 1 BALSASOFT BALSA FOR TIPS sides opei model planning cover fuselage nylon Fit rear stabilizer mount block drill thread four mounting posi tions Make hard pattern section use later fitting stabilizer Cover fuselage top area 1/16 med sheet balsa Cut access opening fuel tank using material cut out make door access hatch battery compartment instrument pan el remove battery after flying session keep transmitter charging way can monitor test receiver battery better fuselage covered nylon clear dope using pool-room powder filler Wait about week paint Hobbypoxy try build tail surfaces landing gearor something during waiting time Apply trim paint clear Hobbypoxy fuselage unit should weigh about 26 oz cabane struts will add another 2 oz Tail Surfces designed removable can used other fuselages experimental options Also seems easier construct repair way Use light weight balsa aim bare weight 4 oz Vibration tends eat up parts back recommend using Du-Bro -scale hinges outboard positions fairly light model 90 fourstroke engine suggest wing always attached running en gine help absorb power pulses Build cover fin horizontal stabilizer separately tie together -in dowels epoxy Epoxying torque wire leading edge elevator before removing center section trailing edge will help ensure true unit covered tail surfaces Solartex weighed 6 oz complete lightest durable tail unit have built covered polyester cloth finished dope Hobbypoxy outlasted except hinge phs two 832 NYLON SCREWBALSA BEND TABS UP TO FiT/32 MILD S/B d/4 SPRUCEIIBMWSTEEL MAKE 2FUSELAGE 4//RIGHT SIDEENG VIEW / 77 SLO FOR I/3D 7REMOVE BER HARD STEELWASHETFITTINGS~ STRUTFOLD UF ONE4-40 BLIND NUT/BOLT PA ______LAYER TOCABANSTRUT -SECURE WITH EPOXY TTERNFORM TABS FLATTEN B SOLDER INSIDE 3/16OD BRASS TUBE 10/ I/B MUSIC WIRE 1/32 STEEL7/3200 /BRASS___________________________ TOP VIEW F MAPLE ENGINE MOUNTS ll ____________________S- DRILL FOR ID-3D NYLON BOLT T/L ull DETAILS SHEET 2 i L S/32OD BRAS TUBING STEEL WASHER I/B MUSIC WIREST SHAPE FRONTSOLDER0 TO APPROS 3/32 5/3D COLLAR STEERABLE TAIL SKID SPRING 2-1/4 FULLY COLLASPED ST 8-1/4 LBS 5/32 BRASS1/32 SHOCK STRUT DETAIL MAKE 2 STEEL SO FA 3 6 SPRUCEEADING EDGE WHEN STRAIGHT WING IS USED STR NGERS OR FUE ANKHA H I/B SOFT BALSA I/B BALSA 2 PL S i-ir p-I/B LITE ______ BALSA DOUBLER — -RECEIVER AREA DRILL FORI/2783S MAPLE 10 32 BOLTSTR PLER HARD BALSA ON EACH SIDE-ACCES ____DRE GU S,PSREAD FON B-3DHATCH I/3D HARD-vvz NYLON SCRE SSTEEL oSLOTTEDCABANE FOR B 32 oNYLON SCREWS 16 METAL SCREWS 4 ,IO 32 1/ STEEL NUT SOLDER 1CABANE BLOCKI/BLITE LIFT STRUT MOUNT STRAP 1/4 LITE~p-p-9- PLYWOODTE MAPLE BLOCKP other fuselages 1/32 music wire brace continuous piece through birch dowel hard points anchored lower rudder hinge pin screw ties tail pieces t0gether helps absorb vibration unit removed tension reduced slips off rear tail surfaces secured fuselage four 8-32 nylon bolts brace Left Square-cut glue strips sides bulkheads msIe ueof jig unncessary Two fuselages under construction pic ture Engine mounts wlil instaiied iater mockup shows biocks used keep mounts parailei gluing Right Lite Piy forward sheetIng heid piace glue sets Nose piece already installed sanded shape along belly sheeting 32 Model Aviation FULL-SIZE PLANS AVAILABLE . SEE PAGE 172 ELEVATORMED BALSAMWHERDUBRO LARGE HIN 2 MILD EEL________ REAR STEEL F RONT LG PATTERNBIRCH DOWEL HARD POINTS /32 MWGRIND NOTCH FOR GOOD SOLDER SHOCK STRUT3/16 BALSA GREET STRUTlPZ21/2 3/B BALSA AXLE 5/32 COLIAR /7 p/1/32WASHERifliRUDDERS BUTYRATE VINDSHIELD1/BLITE PLY3/32 MEDDECK B FORMERSB LSADRILL FOR 6-32 INSTRUMENTIiBALSA~2----______NYLON SCREWS---I-I__ /7-___ ____HARDPOINT/ _____ _I _ ___IFIN ______ ___________I/BLS/BBALSA r __I I/B 3/16I/B BIRCH DOWELS ALUFA STRIP FORMEDBALSA5/16 I/B BALSA UND 3/64 WIRELONGERONS _ ______[3/BBALSA DOUBLERIINDICATORS------3/64 MUSIC WIRE FUSELAGE SID ___BALSA DOUBLERBLOCK STRIPS1/2 4 METAL SCREW MAPLE STABILIZER I/BBALSA1/65/B MEDMOUNT HREAD FOR HPLYSHEETINGBALSA6 33 SCREWS 1BIRCH DOWEL OF B -rIII/BL EMODEL AVIATION 1/BLITEIiFPLY SPRUCEROOSTER PLYIBEELFOUR STROKE I/A J/I If~NTL6 IGNED B DRAWN BY BILL DICKEY IIZiIIrcZ TtrJ o2 CING BY JOEDEMARCO ALL NIGHTS RE8VEDSHEET OF 2 wires lower -scale rudder hinge overkill stress air loads ground knocks power pulse stresses seems reasonable tried using keyed dowel front two screws back began get loose after heavy season flying Undercarriage Tin joints mated using plenty flux heat common error use too little heat using butane torch careful apply too much heat use such torch supply general heat conjunction soldering gun pinpoint heat specific areas June1985 33 Left Vl6w bottom showIng servo tray mounts below battery compartment floor Its good Idea get set up before installing belly sheeting Note authors extensive use cutouts reducing weight Right Steerable tail skid mount bearing opening steering arm left side fuselage slotted 1/32-In plywood plate will cover opening want solder flow technique especially useful doing wrapped joints building-up ifilets between joint wheel thrust washer best way have found jig drill hole fit axle wood block set up vertically vise thrust washer should rest wood block Flow solder windings washer remove general heat gun build up fillet Too much general heat solder will flow off work Watch difference flow ball up roll off latter usually work fluxed properly too little general heat metal Use about 2 toe-in about 30 camber possible mostly eyeballed can assure helps shock struts functional have extensively tested work trouble locating compression springs modify Century Spring Corp No C-233 tension springs pur chased local hardware store modified spring stretching it comes package 30 room temperature slipped piece 5/32 music wire held fully com pressed about 5 min resulting compression spring should 1 3Yi longfrom two strut springs can cut Build steerable tail skid shown plans realistic stable ground handling no servo strain have used design eight other aircraft minutes trouble Substitute wheel hard steel shoe flying pavement sure bind servo setting up steerable arm travel clearances Wing oombination foam balsa using foam nose section foundation lightweight rigid struc hire have excellent results method lighter wing produced all-foam types balsa ribs also have flexibility place ment equipment Take care cut true oores cut sections about 24 long glue together make panels what ever length need Cut nose sections oores cut slots ribs bench saw possible panel has 3Y20 sweepback should considered cutting rib slots Achieving straight panel easy true nose section slots ribs true rear spar use metal template cutting ribs individually soft 3/32 balsa Rib caps medium-hard balsa strength medium-hard sands better soft After ribs set nose section rear spar jig panels table saw cut slots upper lower spars Spars medium balsa set foam junction ribs leading edge sheeting soaked Windex fitted over foam leading edge Mark along edge ball-point pen help position nylon cloth strips join sheeting rib caps Hold sheeting around leading edge masking tape until completely dry remove glue nylon strips along pen line add strength spanwise wing too Ailerons made trailing edge section foam cores fixed trailing edge sections inboard aile rons Dont compromise elephant ears type ailerons design provide aerodynamic balance permits small servo big joband super-responsive Provide differential aileron travel 600 bellcranks Setting control horns back hinge line will provide cases wanted quite bit uptravel couldnt obtained relo cating control horns nor would give sufficient differential Make wing aileron tips softest sheet block balsayou can fmdto help absorb shocks usually get cut dral angle wing panel butt joining panels sure get good fit bias-cut spruce joiner blocks takes effort get good 3-1/2 I/2x BALSA BLOCK___ / SOFT BALSA{i /iK BLOCK FORI--I TIP PARTSf III I/4 SOFTII ALSA II IIDUB IiiI / II {jj~/HINI COVERING AlL TIP PROFiLE I UTOFFAFTER 2~ PEE____ GLUING TO/ CYLINDER HEAD BALSA LITE PLYWOOD6-32 NYLON MOUNT SCREWS DUMMY ENGINE DETAILI GRILL MADEFROM AUTO WINDOW SUN SHADE glue bond very important add strength gluing nylon cloth under center section sheeting thinned Titebond Elmers functional lift struts dont need full Left nose piece Lite Ply left engine mount rail has cut drilled forthe 1 800 bellcrankforthrottle control Right balsa tail surfaces i light medium weight Try keep surfaces 6 oz max weight CG point per plans 34 Model Aviation FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 NYLON CLOTH FULL SPANNYLON CLOTH ADDED UNDER TOP AND BOTTOMTHE CENTER SECTION SHEETING TOP AND BOTTOM I/B BIRCH I/2 S/B MEDI/B BALSAPL WOOD BA SPARSSHEETING TEMPLATE SLOT IN I/IS SOFT BALSAFOAM ONLY_____LEADING EDGE LITESHEETING OOD ~'--H ~-F-- i _ HIll 4 1111 II MAPLE LIFT STRUT FITTING HARD3/32I/IB 7/32SPRUCE I III III 1/16 BALSA Jo ~---FILLER BLOCK 3/B 5/16 MED BALSA___ SPARSLiI 2BHEADREST DETAIL/ SOFT BALSA BLOCK NOTESCOVER THEN ATTACH __________LOAI2NGW4OtSOFT SPAN 84 AVG CORD 12 7/BWITH RC-56 AREA 1032 SQ IN WING CROSS SECTION OPTIONSPOWER LOADING 147 OZ CU IN CUP B STUFFSTATIC ThRUST 130 OZ AT 7750 RPM CREPE STREAMERPROPELLER TOP FLITE 156 BOMBAILERON TRAVEL I-I/CUP 3/4 DOWN RUDDER TRAVEL 4 EACH DIRECTION ELEVATOR TRAVEL 2UPB DOWN ~PARACHUTE________ 4 CYLINDER BANKS TOITO1 RELEASE OPTIONS LOCKS MODEL AVIATION IIATOR WITH SPRUCETO 1W OPENS OFUSELAGENORMAL COVERFOUR STROKE ROOSTER PHOTOGRAPHY UTILITY SHOWN DESIGNED 8 DRAWN SY SILL DICKEY 2 3 4 5 6 TRACING SY JOE DEMARCO ALL RISHT5 RESERVEDSHEET 2092 cantilever strengthwing weighs 3O oztail Matching wing area inherent lift like provide access aileronthe modified NACA 2415 airfoil zero servo through top wing using aRigging flying wing designedincidence overall model weight al hatch looks like gas tank top Corn-to fly normal airspeeds zero anglelows tail plane control pletely covered Super MonoKote thebetween wing chord horizontalContinued page 130 Left fuselage roar deck has Installed battery compartment floor can seen ahead open cockpit landing gear foreground about ready fitting fuselage simple jig gear mounted makes doing job easier accurate Right Grinding rear leg mate front leg will make joint neaterand stronger Text has useful soldering tips June1985 35 SCALE RADIO CONTROL JLLOS Safety Preston Continued page 127 parking area Can guess what wrong postmortem discovered ailerons hooked up backwards Remem ber three qualified inspectors spent 30 minutes checking model missed builders error Perhaps case too cooks can spoil broth isnt sufficient just check correct control surface wiggles wiggle appropriate stick has wiggle right direction too WHEELS CONTROL-UNE FREE-FLIGHT 000 AGESMOOTHGOLDEN AGENEW sizes214CONTOURsizes214BALLOON 343/"23/4"3/ 13131/41321/341/3 1144/a11/433/411/443/a3451/4 11/3511/341411453 1/a65/a21451/41/a614 SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS SEND $1 FOR COMPLETE ILLUSTRATED CATALOG DEPT MA PAWNEE ST. SAN MAICOS CA 9 Human error source problems confined builders fliers models Sometimes manufacturing er ror can cause some grief Just last week received fourth recall notice 1978 automobile dont believe Ive ever heard recall concerning hobby product doesnt mean everything purchase local hobby store perfect few months ago received letter Paul Beretta modeler Glen Cove NY fol lowing Pauls own words experi ence manufacturing error want share incident other day Having pur chased new radio charged bat teries time test out airplane servos receiver switch harness already installed just few moments work hook up battery Since main purposes time servo-travel setup CG adjustment left battery unwrapped flipped switch receiver turned pick up transmitter turned back airplane smoke billowing top fuselage managed pull battery loose switch harness minor burns drop still smoking floor Investigation proved cause problem defective shorted switch result destruction switch harness receiver battery wiring battery case cells dont like think what could have happened battery foam-wrapped stuffed deep side nose plane wires glowing red like big glow plug although materials wires battery case merely melted smoked other materials inside plane may have behaved differently manufacturer kind cooperative about replacing damaged components So aside loss new toy week suffered no real loss can sure though future will check out electrical components outside aircraft before installation important thing aware tremendous heat-generat ing capacity short circuited Ni-Cds know until incident aware Pauls letter jogged memory about similar incident report read number years ago model er purchased new radio hobby store during journey home allegedly set fire station wagon time reaction Ho-Hum hes trying get new car out ra dio manufacturers insurance company Perhaps wrong another case short somewhere radios battery circuitry Anyway moral stories Paul did Always bench check new radio before installa tion model Nobody perfectnot hobby-equipment manufacturers Have safe month John Preton 12235 Tilden wood Dr Rockvile MD 20852 Rooster/Dickey Continued page 35 wing Balance model carefully point shown plans average lift centers aft center gravity After have balanced model dont change balance point trying chase trim prob Continued page 132 130 Model Aviation lems Example find down-ele vator needed hold level flight doesnt mean tail heavy needing nose weight trouble wing lifting tail out plane decrease lift slightly raising wing trailing edge dont mistakenly feel have reduced over lifting capability wing because havent lift strut mount pro vided slots adjust wing problems showing another example versatility parasol configuration proper trim wing profile view will appear have negative incidence aircraft close design weight over weight might actually have add positive incidence wing achieve tail trim case would SCALE WHEELS Real rubber tire cast aluminum hubs True scale appearance 65 diameter Pair mains 0 shipping reducing overall lifting capability model Also sure balance model along roll axis nails pushed soft wing tips will usually correct im balance Set control throws amounts shown plans will produce quick responses such needed creative maneuvers Use elevator back pressure turns glides forward elevator pressure inverted flight right rudder takeoffs climbs Use lots rudder slips hold track varying degrees opposite aileron nice knife-edge flight use almost full top rudder Normal outside snap rools easy recovery positive also normal inverted spins Flat turns GIANT SCALE RETRACT Formerly Annco Mfg Co True scale appearance Will support models up 50 lbs Positive locking up down working oleo struts Precision machined metal lightweight construction Air/hydraulic controls 13/16 air cylinder bore Gear leg length 11 pivot axle Installation drawings instructions air tank included Perfect fit Nosen kits RETRACT GEAR $26900 shipping Wheels sold separately ORDER DIRECT ONLY Knights Air 1400 Rte 32 West Friendship MD 21794 301 489-5050 rudder stable look good like em keep some power may sound like model set up just flying aerobatics fly half-power outstanding trainer stable just responsive enough keep out trouble Work hard low engine idle differential between top rpm idle relatively small four-strokers Low idle required realistic glides safe taxiing maneuvers such takeoff-loop-land back-side airspeed must kept low Use other wings added pleasure versatile parasol heavier-loaded low aspect ratio wing about 24 oz per sq ft would good flying high winds try STOL type Clark-Y airfoil section flaps and/or slots its ball Use accessory hatches sorts thingslike bomb dropping banner tow ing tissue dropping parachute dropping photography whatever can think Field assembly disassembly Rooster easy live loosening six nylon bolts about three turns unplug ging aileron servo snapping wing struts out mounts folding lift struts back against fuselage ready load up takes less two minutes no screws lose thread cold numb fingers system works very well metalwork difficult may appear Just sure tabs match screw heads know will like versatile func tional durable vintage-type airplane Charge Timer/Marez Continued page 42 TestingThis actually dual step will learning program charge timer what button does test work AC plug back wall display blinking press Fast Set button blinking should stop Now press boththeFast Slow set buttons simultaneously release display should indicate either 1200 0000 former clock set 12-hour time 24-hour time latter Pressing 24/12 button should change display indications other Leave 1200 pressing Fast button will advance time rate hour minutes second Slow button advances time two minutes per second Press Fast button until display past 1200 pm indicator small dot upper left corner display should now appear Pressing 24/12 button once will cause dot disappear display change equivalent time 24-hour clock example indicated time 235 pm will become 1435 Pressing Alarm Display button will cause change display some arbitrary time desired alarm time can set Fast Slow set buttons 132 Model Aviation IiLL LLLL U L 13311 beach Ave e Marina Del Rey UA 2 121-6242 KNIGHTS AIR J P-51 J