NO OCR TEXT NO OCR TEXT delight Just thought enlarging design seems strengthen its inherent esthetics Little wonder Bowers plagia rized earlier design using same sur face outlines time came de velop entry FAA home-built mar ket outlines dimensions totally SAM legal model blown up com mercial blueprinter using photo enlarger requirements modern RC gear dic tated several structural changes Also developed unusual much simpler sys tem building symmetrical sectioned tail surfaces Two-stroke power adequate Fly Baby prototype has flown both Fox I9BB OS 25 FSR though model could also le gally powered 30 An OS 40 fourcycle engine proved delight 40 four-stroke still legal since SAM rules count 60% four-stroke displacement compared two-stroke Though Fly Baby has yet flown floats illustrated 1945 Model Airplane News article plan try ap proach Should 72-in version prove delightful flying off water air will very likely publish enlarged float plans later date floats model absolute doll Slow speed flight characteris tics outstandingitll almost fly back wards wind Thermaling ability ex cellent Fly Baby will ride very light lift ease Because its steep dihedral will turn tightly strong thermal no tendency spin out Fly Baby 72 also excels sport role has incredibly short takeoff roll good control model flies docilely please 35% power yet will climb like bandit firewall Landings slow controlled bad pilot looks good model does loops spins lovely stall turns making flying re laxed fun experience model good Pete Bowers Fly Baby can get better transla tion Larger easier track orig inal radio controlled greater versatility utility offering new easier con struction techniques updated model makes hard-to-beat choice Old-Timer flying Whether youre going all-out competition just plain old fun-flying rundont walkto workbench Construction As drawn Fly Baby about minimum weight strength youll using model exclusively sport flying consider strengthening substituting spruce wing spars fu selage longerons increased weight would however somewhat reduce mod els slow speed performance characteristics novice RC fliers tendency fly solid objects single dowel front double post rear cabin rubberbanding wing would advisable grabber system shown plans sufficiently strong under normal use damage cabin roof could oc cur wing tip strike anything solid recommend using thick-grade Hot Stuff cyanoacrylate CyA adhesive project Five-minute epoxy works best ply-to-balsa joints wood sizes standard stock Light weight C-grain sheet ideal Beware un 26 Model Aviation Based color trim scheme Bowers used original full-scale home-built Fly Baby RC model generates quite large head turning quotient dressed its bright yellowand-red transparent polyurethane covering covering technique discussed text Inc siaoiiizer seciion ouiit flat men yiiier sheets added sanded symmetri cal section tried-and-true method constructing truly warp-tree structure Also shown rudder control horn Left A wide range power 20 40 can used model minor modifications 19 engine shown proved ideal choice very smooth idle adequate power Right Close-up servo mounting arrangementAce Bantam ser vos tray Note dowel cabin front part wing attachment setup dowel slides grabber arrangement wing leading edge single nylon bolt through trailing edge screws Du-Bro fitting secure wing position Very simple strong WILWJ ~Yf E PETE OWER VIA DOC MA1ThEW& BALOA ~QBAL&A Ysz BJ1LR PLANKING 25 ENGI~ BRLA Y8 DIA MUSIC diR 3 WHLO . 4 LAMLWRTION 6K 4 B5U&A WIN& TIP CAP W/Y4XY8 PRUC PLC /X2 34 BALSA 3/x4 y QBRLA B1LA 8ItT x Y4 BL8A ThIS Fl eiB CONVEI NLCL 10 ELECTRIC RYJR ACE IThRNRTURPL 0LIVT CllN USEP RINDLY. MKE8 FO IiRPP NEIGORS _____ \ /. BELIEVE ira Left The fuselage rudder stabilizer covered painted prior assembly covering carefully cut away epoxy will applied final assembly photo tail section shows stabilizer ready positioned slot provided fu selage elevator rudder yet installed Right stabilizer place hinges attached elevator linkage hooked up elevator assembly installed stabilizer technique provides neat buried elevator horn minimum hassle graded bundles can lot wast age Hardware fittings standard hobby shop stock items / ply used window frames common stock ten used skinning foam wings cant beg scraps Pattern fliers club hobby shop doesnt carry order thin ply Sig Tail surfaces Since empennage structure involving out-of-the-ordinary construction methods well tackle first symmetrical tail surface sections em ployed original design must dupli cated model SAM legal plane will purely sport however can ignore SAM requirement case build surfaces /4 x A-in stock using conventional techniques Since believe building either flat surface jigs developed fol lowing method project Build flat work surface Trace outlines onto appropriately sized wood slipping car bon paper between plans wood point follow standard build ing techniques Pin down glue together -in sta bilizer elevator center sections Re move dry add 3/ x /16 strips both sides original ribs strips butt against 3/6-sq strips added top bottom hinge spars per plans Once pieces have glued place use sanding block create symmetrical air foil technique shown plan side view much easier shim ming outlines cutting out ribs Its also stronger lighter struc ture looks exactly same covered Wing As tail surfaces trace rib patterns balsa stock using carbon pa per Stack cut knife jigsaw carefully sand final shape Notching trailing edge rib interface adds strength Pin trailing edge over 28 Model Aviation Left Partially finished wing showing half-ribs leading edge rib outline drawings clarify laminated tips positioned slots create accurate tip assembly Half-ribs novel Old-Timer case re-create system Bowers used home built also allow smoother covering avoiding tendency sag Right Universal clamps clothespins being used hold three formers fuselage sides alignment before final cementing Use triangles squares flat surface ensures true fuselage Left Early stage wing construction Note laminated wing tip structure fits against spar ends accommodate upward taper wing Right photo shows simple foam board pattern used laminate wing tips author prefers laminating technique use bamboo dural wire Balsa basswood can used ease technique can used laminating applications NYLON MOTOR MOUNT TO SUrF3A6 PLYWOODI/B LITE PLYI/B LITE PLY MOTOR McKJNT FORCUT-OUT FORv SQ FOUR CYCLE ENGINE4 OZ SULLIVAN4SQ BALSA SS-4 FUEL TANKBALSA 3A6 PLYWOODOPTIONAL NOSE FOR/- LO CLIPSPLY FOUR CYCLE ENGINEI/B NYLONI/8LITE/1yLITE 1/4 3/4 3/IA PLYWOODBASSWOOD _______F- 4I F-2F-3LWe 3M BASSWOOD SASA ShEETI/B SIP MUSIC WIRE MOTOR MOUNT FOR ITU coness SelerminedVIEW FOR PLACEMENT OPTIONAL Engine ChoiceFODR CYCLE ENGINEIN ODNSTRUCTION FIREWALLLANDING GEAR DETAIL 1 40 FOUR CYCLE ENG 0 FOUR CYCLE 3/33 BALSA PLANKINGI/As 3/4 SASS RH T COWL PIECES 4 OZ TANKII SERVOS S LAYERS OF 3132 BALSA NOTE GRAIN SOAK IN SNBsIORIA 8 FORM TO UNDERSIDE OF WING-USE CYP B INSTALL DEFLECTIONS RUDOER S1OTAL NYLON MOTOR x - AELEVATOR L MOUNT 1/4 BALSA SHEET1/16 DIP MUSIC WIRE 0LS DIP MUSIC WIRE 0 FUSELAGE SIDE VIEWMODEL AVIATION 0015 CLEAR PLASTIC TRIM TO FITTHE ORIGINAL FLY BABY LT PETE BoWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS 0 2 3 4 5 5TRACING BY JOE DEMARCO WINDSHIELD PATTERNSHEET OF 2 RIGHTS RESERVED Full-Size Plans AvailableSee Page 196 plans position notches cut out jigsaw blade reversed visual reference Since x %-in balsa stock invariably seems warped its best laminate front wing spar spruce balsa Posi tion spruce top since bottom will flared tips wing tips laminated over foam board cardboard form Moisten balsa diluted ammonia water coat al iphatic resin such Sig Bond slowly pull sandwich end form other Use masking tape hold strips place set Youll find technique will result strong lightweight structure Once laminated wing tips dry pin slot cut trailing edge onto shaped spar faces Bevel bottom tip lamination fair trailing edge wing tips can also installed wing off board wary warping center section built integral part left wing panel Use center section rib pattern plan trim down three ribs before adding sheeting Use tilt jig plans establish dihedral angle right left wing panel base ribs sheeting will stalled after wing fitted fuse lage grabber also added later tilt jig used properly set center wing joint rib thats required block up wing tips carefully sand final dihedral angle Make sure three center section ribs absolutely vertical Join panel center section ep oxy along rib faces spar joints Clamp place until epoxy sets spring-type clothespins Repeat process other wing panel Using razor saw cut necessary slots ribs %2 ply dihedral brace wing joiner Epoxy place against back main spar Sand leading edge shape shown plan After final sanding check wing alignment set aside Fuselage Build side over other di rectly plans Use scraps masking tape glue joints prevent sticking Note longerons extend fire wall Dont cut off stubs glue curing cut out jig bulkheads F-2 F-3 Lite Ply prefer able bulkheads due its ease cut ting regular ply may substituted Lay bulkheads directly over plans glue CyA Trace off patterns firewall F-i bulkhead using carbon paper Cut notches fit precisely possible Pre bend landing gear wire drill strap screw holes dont install gear permanently time Separate two side units popping apart table knife Trim sand smooth Replace right side building surface weight down secure ly Trial fit four bulkhead units good joints place appropriate slots fuselage side Use carpenters square 900 triangle ensure perfect alignment youre satisfied glue place Place left side over bulkheads re peat alignment process glue side slots should now have 30 Model Aviation Len I ne two Vuselage sides built one-over-the-other barrier strips masking tape substituted classic waxed paper ladder formers landing gear installed notched assist alignment Right assembled fuselage graced beauty pe culiar stick-and-strip structures modern adhesives construction methods assemblies no longer difficult build i57j structure airplane completed point wing alignment simple piece string used assure proper alignment wing prior drilling hole trailing edge bolt Equal distance center fuselage tail same point wing tip will square wing fuselage Clamp securely drilling mounting hole model temporarily assembled its bare bones give idea its general arrange ment Notice antiflex brace pushrods position single wing bolt 4 LAMINATIONS OF I/l6 1/4 BALSA 3/32 BALSA SHEET C GRAIN 7 DIHEDRAL AT EACH WING TIP I/4BO BALSA LEADING EDGE PLAN LEFT SIDE 1/4 1/2 BALSA SPAR WITH I/4 I/B SPRUCE CAP Kr 1/4 BALSA TRAILING / EDGE STOCK WING RIB 3/32 BA5A SHEET CENTER SECT RIB WING TIP RIB 3/32 C-GRAIN RALSA HALF RIB 3/32 PLY DIHEDRAL 3/32 BALSA SHEET BRACE BLOCK SAND AFTER INSTAIING /4 BALSA SPAR BALSA GUSSET -77 3/32 BALSA RIBS B HALF RIBS SHIM UP 3/IN SHIM UP I/IN I/4 1/2 BALSA SPAR 3/32 PLY DIHED BRACE TILT JIG 7 1/4 50 BALSA LEASING EDGE 77 APW H B SPR E 1/4 BALSA SHEET 1/4 BALSA SHEET 1 TYPICALBALSA HINGE TOR MW JOINER1/4 3/B AND HORNBALSA 3/321/4 BALSA RIBS 3/22 BALSA HALF RIBS WING DIHEDRAL BREAK 3NP [KGRABBER -A PLANRIGHT SIDE 3/32 BALSA 1 - I/lB BALSA CENTER SECTION SHEETING TOP N BOTTOM 3/32 PLYWOOD —4 PIHEDRAL BRACE ~-BALSA GUSSETS --1/4 BASS OR PINE SHAPE TO MATCH T STOCK 7 DIHEDRAL AT EACH WING TIP 4 LAMINATIONS OF I/IN 1/4 BALSA-WING TIP I/4I BALSA TE STOCK 3/IN SO BALSA /4 BALSA SHEET UNSANDED 3/W3/B BALSA 7 3/32 3/IN BALSA FILLER3/32I/4 BASA SANDED FIN/RUDDER B STAB/ELEV CONSTRUCTION 3/IN PLYWOOD V4BALSA SHEET7 OUTLINE GRABBER NOTE SAM EGAL ENLARGEMENT OF 941 ROW- P F RECORD HOLSER I/4 3/B BALSA ENLARGED SO% AND CONVERTED TO N/C ENGINE 19 -25 TWO CYCLE ON 40 FOUR CYCLE SPAN 72 WING CHORD 10- AREA 700 50 IN SAM MIN WT 49 02 PROTOTYPE WT SI 02 POWER 31 CU IN 0345B MODEL AVIATION THE ORIGINAL FLY BABY Li PETE BOWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS TRACING BY OETEM~ ALL RIGHTS O SHEET 2 OF 2 Full-Size Plans AvailableSee Page 196 Kings Symbol Power Sceptor fly Sceptor youre King Hill Bushwacker Designed low power sport flyer Bushwacker flies well 15 20 size engine large wing area light wing loading make Bushwacker almost powered glider will surprise its performance Construction wood straight forward Due complexity recommend intermediate builderlflyer PRICESSuggested Retail Windrifter$ 7695 Bushwacker$ 7395 Mini Bird$ 5695 Stepp Two$ 4795 R V 4$10695 Folke WuIfe 190$10995 P-47 Master Scale$17495 Mystique$ 7995 SCEPTOR MODELS 1934 Comanche Street Oceanside California 92056 619-726-4971 box perfectly square fore aft well top bottom preferred method finishing rear section fuselage leave building board jack up tail post centerline exactly one-half fuselage width Using plan top view cut cross braces pairs install An alternate conventional technique position box wing saddle top view pull tail section gether over plan Regardless method used ensure fuselage straight along centerline Planking hatch area over fuel tank best accomplished stringy sheet balsa soaked ammonia water Using thick Hot Stuff attach sheet base curl up over bulkheads bead CyA opposite side installed same manner making joint top slicing through both halves straight edge Several cuts may required nice seam window frames cut / ply thickness commonly used cover foam wings Using plan guide trace patterns carefully cut out glue fuselage frames provide hidden seam installing clear plastic windows inside will done later using RC 56 An extra filler piece basswood pine now epoxied top F-3 crosspiece wing-seat front pieces will reinforce bracket grab ber tank seated Lite Ply floor plumbing running through engine mount cutout Standard throttle control ca ble used bottom sheeting sanded side taper before its installed thick Hot Stuff Several narrow strips can used lieu single sheet fuselage finished ready covering round longerons pleas ing shape sand nose blocks final shape thickness cheek blocks will vary depending engine installation Notice 25 two-stroke installation shown has thicker ones course thicker cheek blocks greater nose weightand narrower mount will necessarily Finally epoxy front dowel cabin roof Wing-fuselage assembly Drill Y16-dia hole exact center hardwood cen ter section trailing edge Its fore/aft location trailing edge based center hole Du-Bro bracket mounted exact center F-3 Bolt wing onto fuselage Clamp 3A 6 ply grabber against face dihedral brace After pinning end piece heavy string center rearmost fuselage use string check wing tips precisely equi distant Adjust grabber accordingly youre completely satisfied alignment epoxy permanently place 32 Model Aviation crptnr NDRI FiFES WHATEVER YOUR ABILITY THE WINDRIFTER MAKES YOUR FLYING EASIER DELUXE QUALITY KIT DIE CUT RIBS ALL HARDWARE INCLUDED SPOILER KIT INCLUDED Wing Span 2 pecel998 99ng Asee903 sq ro Lifting Sottace1042 sq n Wing Loading638 oz/tt FIpng wegttt4000 AotOlFell5l cthoot ballast Up 4 lbs ballast nap added concept grabber unique Fly Baby 72 have used success fully 12 different designs thus farand have yet see fail wild spins beginner however advised con sider using old-fashioned rubberbands fastening wing Once wing-fuselage assembly com pleted build forward cabin roof Trac ing outlines plan cut two pieces %2 balsa noticing grain direc tion soaked ammonia water laminated using thick Hot Stuff molded fit leading edge wing contour Make sure doesnt stick wing Reinstall wing fuselage adjust roof piece perfect fit glue perma nently fuselage Covering preferred method cover smallest pieces first MonoKote works well Cover fin rudder stabilizer elevator separately cut slots hinges Cover entire fuselage cut out stabilizer slot fin mounting area Similarly cover over windows cut away material installing clear plastic later Slide stabilizer its slot epoxy place after assuring proper midline horizontal-plane alignment Slip fin its slots adjust vertical alignment epoxy place Hinge rudder eleva tor sliding molded hinges pre cut slots securing toothpick segments Hot Stuff color trim model accom plished spraying red Poly-U onto MonoKote covering lightly buffing No 400 steel wool Sig Stripe-Rite makes excellent masking tape since %2 A-in tape will flex around curves quite easily Seal edges against fuel seepage brushing clear Sig Skybrite spray misted can held 12 surface Try smooth thin coat gives semitransparent effect contrasting trim done StripeRite tape sealed clear Skybrite vi nyl numbers purchased office supply store nose area tank com partment fuel-proofed clear Sky brite before painting Radio installation control Ny-Rod stiffened along its length cross members made up scrap balsa connector servo end soldered clev adjustable clevis attached horn control surfaces servos installed pair hardwood beams glued Lite Ply Hot Stuff battery installed bay between F-I F-2 first bay hind firewall easily accessed model balanced quite well RC com ponents positioned drawn Flying preflight testing home away added pressure flying Continued page 146 TM FUEL WIZZARD THE WORLDS FASTEST AND MOST CONVENIENT FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE * DURABLE FOR LONG LIFE FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS SUGGESTED RETAIL $ 995 NOW JUST $ 750 EPRINT PLEASE ENTER MY ORDER FOR FUEL WIZZARDS AT $ 750 POSTAGE PAID ENCLOSE CHECK OR MONEY ORDER NAME STREET ADDRESS___________________ APT NO________ CITY________________________ STATEZIP_______ SEND TO ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 4 DEALER INQUIRIES INVITED October 1989 33 SEE YOUR DEALER OR ORDER DIRECT FROM TILTS AD PRECISION MODEL PRODUCTS uzZZ7Is# Made U S BARSTOCK ALUMINUM SPINNERS Pan No Size TT-150-B .. 1-1/2 TT-175-B . 1-3/4 TT-200-B 11-225-B .. 21/4 11-226-B .. 2-1/4 FAI . TT-250-B . 2-1/2 TT-251-B . 2-1/2 FAI .. TT-275-B 3/4 TT-276-8 .. 2-3/4 FAI .. 11-300-B 11-301-BPAl TT-325-B . 3-1/4 TT-350-B /2 TT-375-B .. 3-3/4 11-400-B 4 RetailApprox PriceWeight $1395058 02 149509502 159510002 169516002 189515002 189519002 209517002 229522002 249520002 269526002 289525002 369534002 499547002 599552002 699557002 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add 5300 Per Spinner PROP NUT ADAPTORS Part No Size TT-140-A . 1/4-28 TT-147-A 4-28/7mm . TT-610-A 10mm TT-710-A 10mm TT-516-A '5/16-24 TT-518-A .. 5/16-24/8mm IT-BiD-A x 10mm TT-825-A . 8x 125mm TT-375-A3/8-24 TT-125-A x 125mm Retail Approx Price Weight $495 061 02 49506102 49506302 49508202 495 602 49507602 495076oz 495 .. 075 02 595 117 02 595 02 3 Pieces Nut Washer anti Machined Bushing Add S350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 other 357th alumnus Chuck Yeager alive well TV again again think single-seat Dornier-335 Air Space Museum Washington DCpossibly same wife Helen beginning push 70 pretty hard both still ac tive licensed pilots have dabbling RC several years am enclosing picture freehand scratch-builts little 50 Saito powered 514-pounderreferred Round big 13-lb 8footer named Mr Big Its powered Zenoah 23 Both fly very well Harvey Mace Ft Bragg CA Safety/Preston Continued page 22 letter stated story apparently first sur faced 1967 So happen prefer assem bling models components arc welding rather gluing also weareontact lenses dont alarmed saw warning National Newsletter Its just true Have another safe Fly Baby/Mathews Continued page 33 site Test range free surface movement deflections per plans engine carbure tor needle settings engine-on radio op eration Finally important make sure model balances slightly ward center-of-gravity shown plans Add ballast needed Dont fly model tail-heavy everything checks out OK Fly Baby ready big try field head wind add little right rudder advance throttle youre air borne 12 ft adding up elevator youre taking off downwind Remember climb rate func tion engine speed elevator Dont horse airplane around heavy-handedly gentle caresses thats needed Take model up bit throttle down dead slow Still isnt sinking much Find little thermal shut engine off Now isnt something kind flying too sedate taste try some slow-speed touch-andbumps Hows easy Did ever prettier Whatever style flying youll find Old-Timer will oblige Versatile brisk smooth responsive Fly Baby will exactly what want See yourself isnt up date Old-Timer could ask dB Facts/Abbott Continued page 35 erates Quiet whisper 20 dB Conversation 65 dB Loud orchestra 80 dB Start danger 90 dB Amplified rock band 110 dB Threshold pain 130 dB Federal agencies have established recom mended standards safe noise exposure eight hours per day 90 dB two hours per day 100 dB less one-quarter hour per day 115 dB Lets reexamine AMA FAI cri teria Current AMA90 dB 9 ft Old FAIl00 dB meter Current FAI98 dB three meters order compare recommenda tions need convert single distancein case 9 ft Thats easy enough involves converting meters feet meter ft applying inverse square law discussed above results Current AMA90 dB 9 ft Old FAI912 dB 9 ft Current FAI988 dB 9 ft As can see new FAI regulation considerably less stringent old 146 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManse K&B FUELS K&B Glow PLUGS 9 Blends4 Choices Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co Electric Motors Rubber Tissue Cox Parts Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 Letters Editor Continued page 12 V
Edition: Model Aviation - 1989/10
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 146
NO OCR TEXT NO OCR TEXT delight Just thought enlarging design seems strengthen its inherent esthetics Little wonder Bowers plagia rized earlier design using same sur face outlines time came de velop entry FAA home-built mar ket outlines dimensions totally SAM legal model blown up com mercial blueprinter using photo enlarger requirements modern RC gear dic tated several structural changes Also developed unusual much simpler sys tem building symmetrical sectioned tail surfaces Two-stroke power adequate Fly Baby prototype has flown both Fox I9BB OS 25 FSR though model could also le gally powered 30 An OS 40 fourcycle engine proved delight 40 four-stroke still legal since SAM rules count 60% four-stroke displacement compared two-stroke Though Fly Baby has yet flown floats illustrated 1945 Model Airplane News article plan try ap proach Should 72-in version prove delightful flying off water air will very likely publish enlarged float plans later date floats model absolute doll Slow speed flight characteris tics outstandingitll almost fly back wards wind Thermaling ability ex cellent Fly Baby will ride very light lift ease Because its steep dihedral will turn tightly strong thermal no tendency spin out Fly Baby 72 also excels sport role has incredibly short takeoff roll good control model flies docilely please 35% power yet will climb like bandit firewall Landings slow controlled bad pilot looks good model does loops spins lovely stall turns making flying re laxed fun experience model good Pete Bowers Fly Baby can get better transla tion Larger easier track orig inal radio controlled greater versatility utility offering new easier con struction techniques updated model makes hard-to-beat choice Old-Timer flying Whether youre going all-out competition just plain old fun-flying rundont walkto workbench Construction As drawn Fly Baby about minimum weight strength youll using model exclusively sport flying consider strengthening substituting spruce wing spars fu selage longerons increased weight would however somewhat reduce mod els slow speed performance characteristics novice RC fliers tendency fly solid objects single dowel front double post rear cabin rubberbanding wing would advisable grabber system shown plans sufficiently strong under normal use damage cabin roof could oc cur wing tip strike anything solid recommend using thick-grade Hot Stuff cyanoacrylate CyA adhesive project Five-minute epoxy works best ply-to-balsa joints wood sizes standard stock Light weight C-grain sheet ideal Beware un 26 Model Aviation Based color trim scheme Bowers used original full-scale home-built Fly Baby RC model generates quite large head turning quotient dressed its bright yellowand-red transparent polyurethane covering covering technique discussed text Inc siaoiiizer seciion ouiit flat men yiiier sheets added sanded symmetri cal section tried-and-true method constructing truly warp-tree structure Also shown rudder control horn Left A wide range power 20 40 can used model minor modifications 19 engine shown proved ideal choice very smooth idle adequate power Right Close-up servo mounting arrangementAce Bantam ser vos tray Note dowel cabin front part wing attachment setup dowel slides grabber arrangement wing leading edge single nylon bolt through trailing edge screws Du-Bro fitting secure wing position Very simple strong WILWJ ~Yf E PETE OWER VIA DOC MA1ThEW& BALOA ~QBAL&A Ysz BJ1LR PLANKING 25 ENGI~ BRLA Y8 DIA MUSIC diR 3 WHLO . 4 LAMLWRTION 6K 4 B5U&A WIN& TIP CAP W/Y4XY8 PRUC PLC /X2 34 BALSA 3/x4 y QBRLA B1LA 8ItT x Y4 BL8A ThIS Fl eiB CONVEI NLCL 10 ELECTRIC RYJR ACE IThRNRTURPL 0LIVT CllN USEP RINDLY. MKE8 FO IiRPP NEIGORS _____ \ /. BELIEVE ira Left The fuselage rudder stabilizer covered painted prior assembly covering carefully cut away epoxy will applied final assembly photo tail section shows stabilizer ready positioned slot provided fu selage elevator rudder yet installed Right stabilizer place hinges attached elevator linkage hooked up elevator assembly installed stabilizer technique provides neat buried elevator horn minimum hassle graded bundles can lot wast age Hardware fittings standard hobby shop stock items / ply used window frames common stock ten used skinning foam wings cant beg scraps Pattern fliers club hobby shop doesnt carry order thin ply Sig Tail surfaces Since empennage structure involving out-of-the-ordinary construction methods well tackle first symmetrical tail surface sections em ployed original design must dupli cated model SAM legal plane will purely sport however can ignore SAM requirement case build surfaces /4 x A-in stock using conventional techniques Since believe building either flat surface jigs developed fol lowing method project Build flat work surface Trace outlines onto appropriately sized wood slipping car bon paper between plans wood point follow standard build ing techniques Pin down glue together -in sta bilizer elevator center sections Re move dry add 3/ x /16 strips both sides original ribs strips butt against 3/6-sq strips added top bottom hinge spars per plans Once pieces have glued place use sanding block create symmetrical air foil technique shown plan side view much easier shim ming outlines cutting out ribs Its also stronger lighter struc ture looks exactly same covered Wing As tail surfaces trace rib patterns balsa stock using carbon pa per Stack cut knife jigsaw carefully sand final shape Notching trailing edge rib interface adds strength Pin trailing edge over 28 Model Aviation Left Partially finished wing showing half-ribs leading edge rib outline drawings clarify laminated tips positioned slots create accurate tip assembly Half-ribs novel Old-Timer case re-create system Bowers used home built also allow smoother covering avoiding tendency sag Right Universal clamps clothespins being used hold three formers fuselage sides alignment before final cementing Use triangles squares flat surface ensures true fuselage Left Early stage wing construction Note laminated wing tip structure fits against spar ends accommodate upward taper wing Right photo shows simple foam board pattern used laminate wing tips author prefers laminating technique use bamboo dural wire Balsa basswood can used ease technique can used laminating applications NYLON MOTOR MOUNT TO SUrF3A6 PLYWOODI/B LITE PLYI/B LITE PLY MOTOR McKJNT FORCUT-OUT FORv SQ FOUR CYCLE ENGINE4 OZ SULLIVAN4SQ BALSA SS-4 FUEL TANKBALSA 3A6 PLYWOODOPTIONAL NOSE FOR/- LO CLIPSPLY FOUR CYCLE ENGINEI/B NYLONI/8LITE/1yLITE 1/4 3/4 3/IA PLYWOODBASSWOOD _______F- 4I F-2F-3LWe 3M BASSWOOD SASA ShEETI/B SIP MUSIC WIRE MOTOR MOUNT FOR ITU coness SelerminedVIEW FOR PLACEMENT OPTIONAL Engine ChoiceFODR CYCLE ENGINEIN ODNSTRUCTION FIREWALLLANDING GEAR DETAIL 1 40 FOUR CYCLE ENG 0 FOUR CYCLE 3/33 BALSA PLANKINGI/As 3/4 SASS RH T COWL PIECES 4 OZ TANKII SERVOS S LAYERS OF 3132 BALSA NOTE GRAIN SOAK IN SNBsIORIA 8 FORM TO UNDERSIDE OF WING-USE CYP B INSTALL DEFLECTIONS RUDOER S1OTAL NYLON MOTOR x - AELEVATOR L MOUNT 1/4 BALSA SHEET1/16 DIP MUSIC WIRE 0LS DIP MUSIC WIRE 0 FUSELAGE SIDE VIEWMODEL AVIATION 0015 CLEAR PLASTIC TRIM TO FITTHE ORIGINAL FLY BABY LT PETE BoWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS 0 2 3 4 5 5TRACING BY JOE DEMARCO WINDSHIELD PATTERNSHEET OF 2 RIGHTS RESERVED Full-Size Plans AvailableSee Page 196 plans position notches cut out jigsaw blade reversed visual reference Since x %-in balsa stock invariably seems warped its best laminate front wing spar spruce balsa Posi tion spruce top since bottom will flared tips wing tips laminated over foam board cardboard form Moisten balsa diluted ammonia water coat al iphatic resin such Sig Bond slowly pull sandwich end form other Use masking tape hold strips place set Youll find technique will result strong lightweight structure Once laminated wing tips dry pin slot cut trailing edge onto shaped spar faces Bevel bottom tip lamination fair trailing edge wing tips can also installed wing off board wary warping center section built integral part left wing panel Use center section rib pattern plan trim down three ribs before adding sheeting Use tilt jig plans establish dihedral angle right left wing panel base ribs sheeting will stalled after wing fitted fuse lage grabber also added later tilt jig used properly set center wing joint rib thats required block up wing tips carefully sand final dihedral angle Make sure three center section ribs absolutely vertical Join panel center section ep oxy along rib faces spar joints Clamp place until epoxy sets spring-type clothespins Repeat process other wing panel Using razor saw cut necessary slots ribs %2 ply dihedral brace wing joiner Epoxy place against back main spar Sand leading edge shape shown plan After final sanding check wing alignment set aside Fuselage Build side over other di rectly plans Use scraps masking tape glue joints prevent sticking Note longerons extend fire wall Dont cut off stubs glue curing cut out jig bulkheads F-2 F-3 Lite Ply prefer able bulkheads due its ease cut ting regular ply may substituted Lay bulkheads directly over plans glue CyA Trace off patterns firewall F-i bulkhead using carbon paper Cut notches fit precisely possible Pre bend landing gear wire drill strap screw holes dont install gear permanently time Separate two side units popping apart table knife Trim sand smooth Replace right side building surface weight down secure ly Trial fit four bulkhead units good joints place appropriate slots fuselage side Use carpenters square 900 triangle ensure perfect alignment youre satisfied glue place Place left side over bulkheads re peat alignment process glue side slots should now have 30 Model Aviation Len I ne two Vuselage sides built one-over-the-other barrier strips masking tape substituted classic waxed paper ladder formers landing gear installed notched assist alignment Right assembled fuselage graced beauty pe culiar stick-and-strip structures modern adhesives construction methods assemblies no longer difficult build i57j structure airplane completed point wing alignment simple piece string used assure proper alignment wing prior drilling hole trailing edge bolt Equal distance center fuselage tail same point wing tip will square wing fuselage Clamp securely drilling mounting hole model temporarily assembled its bare bones give idea its general arrange ment Notice antiflex brace pushrods position single wing bolt 4 LAMINATIONS OF I/l6 1/4 BALSA 3/32 BALSA SHEET C GRAIN 7 DIHEDRAL AT EACH WING TIP I/4BO BALSA LEADING EDGE PLAN LEFT SIDE 1/4 1/2 BALSA SPAR WITH I/4 I/B SPRUCE CAP Kr 1/4 BALSA TRAILING / EDGE STOCK WING RIB 3/32 BA5A SHEET CENTER SECT RIB WING TIP RIB 3/32 C-GRAIN RALSA HALF RIB 3/32 PLY DIHEDRAL 3/32 BALSA SHEET BRACE BLOCK SAND AFTER INSTAIING /4 BALSA SPAR BALSA GUSSET -77 3/32 BALSA RIBS B HALF RIBS SHIM UP 3/IN SHIM UP I/IN I/4 1/2 BALSA SPAR 3/32 PLY DIHED BRACE TILT JIG 7 1/4 50 BALSA LEASING EDGE 77 APW H B SPR E 1/4 BALSA SHEET 1/4 BALSA SHEET 1 TYPICALBALSA HINGE TOR MW JOINER1/4 3/B AND HORNBALSA 3/321/4 BALSA RIBS 3/22 BALSA HALF RIBS WING DIHEDRAL BREAK 3NP [KGRABBER -A PLANRIGHT SIDE 3/32 BALSA 1 - I/lB BALSA CENTER SECTION SHEETING TOP N BOTTOM 3/32 PLYWOOD —4 PIHEDRAL BRACE ~-BALSA GUSSETS --1/4 BASS OR PINE SHAPE TO MATCH T STOCK 7 DIHEDRAL AT EACH WING TIP 4 LAMINATIONS OF I/IN 1/4 BALSA-WING TIP I/4I BALSA TE STOCK 3/IN SO BALSA /4 BALSA SHEET UNSANDED 3/W3/B BALSA 7 3/32 3/IN BALSA FILLER3/32I/4 BASA SANDED FIN/RUDDER B STAB/ELEV CONSTRUCTION 3/IN PLYWOOD V4BALSA SHEET7 OUTLINE GRABBER NOTE SAM EGAL ENLARGEMENT OF 941 ROW- P F RECORD HOLSER I/4 3/B BALSA ENLARGED SO% AND CONVERTED TO N/C ENGINE 19 -25 TWO CYCLE ON 40 FOUR CYCLE SPAN 72 WING CHORD 10- AREA 700 50 IN SAM MIN WT 49 02 PROTOTYPE WT SI 02 POWER 31 CU IN 0345B MODEL AVIATION THE ORIGINAL FLY BABY Li PETE BOWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS TRACING BY OETEM~ ALL RIGHTS O SHEET 2 OF 2 Full-Size Plans AvailableSee Page 196 Kings Symbol Power Sceptor fly Sceptor youre King Hill Bushwacker Designed low power sport flyer Bushwacker flies well 15 20 size engine large wing area light wing loading make Bushwacker almost powered glider will surprise its performance Construction wood straight forward Due complexity recommend intermediate builderlflyer PRICESSuggested Retail Windrifter$ 7695 Bushwacker$ 7395 Mini Bird$ 5695 Stepp Two$ 4795 R V 4$10695 Folke WuIfe 190$10995 P-47 Master Scale$17495 Mystique$ 7995 SCEPTOR MODELS 1934 Comanche Street Oceanside California 92056 619-726-4971 box perfectly square fore aft well top bottom preferred method finishing rear section fuselage leave building board jack up tail post centerline exactly one-half fuselage width Using plan top view cut cross braces pairs install An alternate conventional technique position box wing saddle top view pull tail section gether over plan Regardless method used ensure fuselage straight along centerline Planking hatch area over fuel tank best accomplished stringy sheet balsa soaked ammonia water Using thick Hot Stuff attach sheet base curl up over bulkheads bead CyA opposite side installed same manner making joint top slicing through both halves straight edge Several cuts may required nice seam window frames cut / ply thickness commonly used cover foam wings Using plan guide trace patterns carefully cut out glue fuselage frames provide hidden seam installing clear plastic windows inside will done later using RC 56 An extra filler piece basswood pine now epoxied top F-3 crosspiece wing-seat front pieces will reinforce bracket grab ber tank seated Lite Ply floor plumbing running through engine mount cutout Standard throttle control ca ble used bottom sheeting sanded side taper before its installed thick Hot Stuff Several narrow strips can used lieu single sheet fuselage finished ready covering round longerons pleas ing shape sand nose blocks final shape thickness cheek blocks will vary depending engine installation Notice 25 two-stroke installation shown has thicker ones course thicker cheek blocks greater nose weightand narrower mount will necessarily Finally epoxy front dowel cabin roof Wing-fuselage assembly Drill Y16-dia hole exact center hardwood cen ter section trailing edge Its fore/aft location trailing edge based center hole Du-Bro bracket mounted exact center F-3 Bolt wing onto fuselage Clamp 3A 6 ply grabber against face dihedral brace After pinning end piece heavy string center rearmost fuselage use string check wing tips precisely equi distant Adjust grabber accordingly youre completely satisfied alignment epoxy permanently place 32 Model Aviation crptnr NDRI FiFES WHATEVER YOUR ABILITY THE WINDRIFTER MAKES YOUR FLYING EASIER DELUXE QUALITY KIT DIE CUT RIBS ALL HARDWARE INCLUDED SPOILER KIT INCLUDED Wing Span 2 pecel998 99ng Asee903 sq ro Lifting Sottace1042 sq n Wing Loading638 oz/tt FIpng wegttt4000 AotOlFell5l cthoot ballast Up 4 lbs ballast nap added concept grabber unique Fly Baby 72 have used success fully 12 different designs thus farand have yet see fail wild spins beginner however advised con sider using old-fashioned rubberbands fastening wing Once wing-fuselage assembly com pleted build forward cabin roof Trac ing outlines plan cut two pieces %2 balsa noticing grain direc tion soaked ammonia water laminated using thick Hot Stuff molded fit leading edge wing contour Make sure doesnt stick wing Reinstall wing fuselage adjust roof piece perfect fit glue perma nently fuselage Covering preferred method cover smallest pieces first MonoKote works well Cover fin rudder stabilizer elevator separately cut slots hinges Cover entire fuselage cut out stabilizer slot fin mounting area Similarly cover over windows cut away material installing clear plastic later Slide stabilizer its slot epoxy place after assuring proper midline horizontal-plane alignment Slip fin its slots adjust vertical alignment epoxy place Hinge rudder eleva tor sliding molded hinges pre cut slots securing toothpick segments Hot Stuff color trim model accom plished spraying red Poly-U onto MonoKote covering lightly buffing No 400 steel wool Sig Stripe-Rite makes excellent masking tape since %2 A-in tape will flex around curves quite easily Seal edges against fuel seepage brushing clear Sig Skybrite spray misted can held 12 surface Try smooth thin coat gives semitransparent effect contrasting trim done StripeRite tape sealed clear Skybrite vi nyl numbers purchased office supply store nose area tank com partment fuel-proofed clear Sky brite before painting Radio installation control Ny-Rod stiffened along its length cross members made up scrap balsa connector servo end soldered clev adjustable clevis attached horn control surfaces servos installed pair hardwood beams glued Lite Ply Hot Stuff battery installed bay between F-I F-2 first bay hind firewall easily accessed model balanced quite well RC com ponents positioned drawn Flying preflight testing home away added pressure flying Continued page 146 TM FUEL WIZZARD THE WORLDS FASTEST AND MOST CONVENIENT FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE * DURABLE FOR LONG LIFE FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS SUGGESTED RETAIL $ 995 NOW JUST $ 750 EPRINT PLEASE ENTER MY ORDER FOR FUEL WIZZARDS AT $ 750 POSTAGE PAID ENCLOSE CHECK OR MONEY ORDER NAME STREET ADDRESS___________________ APT NO________ CITY________________________ STATEZIP_______ SEND TO ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 4 DEALER INQUIRIES INVITED October 1989 33 SEE YOUR DEALER OR ORDER DIRECT FROM TILTS AD PRECISION MODEL PRODUCTS uzZZ7Is# Made U S BARSTOCK ALUMINUM SPINNERS Pan No Size TT-150-B .. 1-1/2 TT-175-B . 1-3/4 TT-200-B 11-225-B .. 21/4 11-226-B .. 2-1/4 FAI . TT-250-B . 2-1/2 TT-251-B . 2-1/2 FAI .. TT-275-B 3/4 TT-276-8 .. 2-3/4 FAI .. 11-300-B 11-301-BPAl TT-325-B . 3-1/4 TT-350-B /2 TT-375-B .. 3-3/4 11-400-B 4 RetailApprox PriceWeight $1395058 02 149509502 159510002 169516002 189515002 189519002 209517002 229522002 249520002 269526002 289525002 369534002 499547002 599552002 699557002 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add 5300 Per Spinner PROP NUT ADAPTORS Part No Size TT-140-A . 1/4-28 TT-147-A 4-28/7mm . TT-610-A 10mm TT-710-A 10mm TT-516-A '5/16-24 TT-518-A .. 5/16-24/8mm IT-BiD-A x 10mm TT-825-A . 8x 125mm TT-375-A3/8-24 TT-125-A x 125mm Retail Approx Price Weight $495 061 02 49506102 49506302 49508202 495 602 49507602 495076oz 495 .. 075 02 595 117 02 595 02 3 Pieces Nut Washer anti Machined Bushing Add S350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 other 357th alumnus Chuck Yeager alive well TV again again think single-seat Dornier-335 Air Space Museum Washington DCpossibly same wife Helen beginning push 70 pretty hard both still ac tive licensed pilots have dabbling RC several years am enclosing picture freehand scratch-builts little 50 Saito powered 514-pounderreferred Round big 13-lb 8footer named Mr Big Its powered Zenoah 23 Both fly very well Harvey Mace Ft Bragg CA Safety/Preston Continued page 22 letter stated story apparently first sur faced 1967 So happen prefer assem bling models components arc welding rather gluing also weareontact lenses dont alarmed saw warning National Newsletter Its just true Have another safe Fly Baby/Mathews Continued page 33 site Test range free surface movement deflections per plans engine carbure tor needle settings engine-on radio op eration Finally important make sure model balances slightly ward center-of-gravity shown plans Add ballast needed Dont fly model tail-heavy everything checks out OK Fly Baby ready big try field head wind add little right rudder advance throttle youre air borne 12 ft adding up elevator youre taking off downwind Remember climb rate func tion engine speed elevator Dont horse airplane around heavy-handedly gentle caresses thats needed Take model up bit throttle down dead slow Still isnt sinking much Find little thermal shut engine off Now isnt something kind flying too sedate taste try some slow-speed touch-andbumps Hows easy Did ever prettier Whatever style flying youll find Old-Timer will oblige Versatile brisk smooth responsive Fly Baby will exactly what want See yourself isnt up date Old-Timer could ask dB Facts/Abbott Continued page 35 erates Quiet whisper 20 dB Conversation 65 dB Loud orchestra 80 dB Start danger 90 dB Amplified rock band 110 dB Threshold pain 130 dB Federal agencies have established recom mended standards safe noise exposure eight hours per day 90 dB two hours per day 100 dB less one-quarter hour per day 115 dB Lets reexamine AMA FAI cri teria Current AMA90 dB 9 ft Old FAIl00 dB meter Current FAI98 dB three meters order compare recommenda tions need convert single distancein case 9 ft Thats easy enough involves converting meters feet meter ft applying inverse square law discussed above results Current AMA90 dB 9 ft Old FAI912 dB 9 ft Current FAI988 dB 9 ft As can see new FAI regulation considerably less stringent old 146 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManse K&B FUELS K&B Glow PLUGS 9 Blends4 Choices Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co Electric Motors Rubber Tissue Cox Parts Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 Letters Editor Continued page 12 V
Edition: Model Aviation - 1989/10
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 146
NO OCR TEXT NO OCR TEXT delight Just thought enlarging design seems strengthen its inherent esthetics Little wonder Bowers plagia rized earlier design using same sur face outlines time came de velop entry FAA home-built mar ket outlines dimensions totally SAM legal model blown up com mercial blueprinter using photo enlarger requirements modern RC gear dic tated several structural changes Also developed unusual much simpler sys tem building symmetrical sectioned tail surfaces Two-stroke power adequate Fly Baby prototype has flown both Fox I9BB OS 25 FSR though model could also le gally powered 30 An OS 40 fourcycle engine proved delight 40 four-stroke still legal since SAM rules count 60% four-stroke displacement compared two-stroke Though Fly Baby has yet flown floats illustrated 1945 Model Airplane News article plan try ap proach Should 72-in version prove delightful flying off water air will very likely publish enlarged float plans later date floats model absolute doll Slow speed flight characteris tics outstandingitll almost fly back wards wind Thermaling ability ex cellent Fly Baby will ride very light lift ease Because its steep dihedral will turn tightly strong thermal no tendency spin out Fly Baby 72 also excels sport role has incredibly short takeoff roll good control model flies docilely please 35% power yet will climb like bandit firewall Landings slow controlled bad pilot looks good model does loops spins lovely stall turns making flying re laxed fun experience model good Pete Bowers Fly Baby can get better transla tion Larger easier track orig inal radio controlled greater versatility utility offering new easier con struction techniques updated model makes hard-to-beat choice Old-Timer flying Whether youre going all-out competition just plain old fun-flying rundont walkto workbench Construction As drawn Fly Baby about minimum weight strength youll using model exclusively sport flying consider strengthening substituting spruce wing spars fu selage longerons increased weight would however somewhat reduce mod els slow speed performance characteristics novice RC fliers tendency fly solid objects single dowel front double post rear cabin rubberbanding wing would advisable grabber system shown plans sufficiently strong under normal use damage cabin roof could oc cur wing tip strike anything solid recommend using thick-grade Hot Stuff cyanoacrylate CyA adhesive project Five-minute epoxy works best ply-to-balsa joints wood sizes standard stock Light weight C-grain sheet ideal Beware un 26 Model Aviation Based color trim scheme Bowers used original full-scale home-built Fly Baby RC model generates quite large head turning quotient dressed its bright yellowand-red transparent polyurethane covering covering technique discussed text Inc siaoiiizer seciion ouiit flat men yiiier sheets added sanded symmetri cal section tried-and-true method constructing truly warp-tree structure Also shown rudder control horn Left A wide range power 20 40 can used model minor modifications 19 engine shown proved ideal choice very smooth idle adequate power Right Close-up servo mounting arrangementAce Bantam ser vos tray Note dowel cabin front part wing attachment setup dowel slides grabber arrangement wing leading edge single nylon bolt through trailing edge screws Du-Bro fitting secure wing position Very simple strong WILWJ ~Yf E PETE OWER VIA DOC MA1ThEW& BALOA ~QBAL&A Ysz BJ1LR PLANKING 25 ENGI~ BRLA Y8 DIA MUSIC diR 3 WHLO . 4 LAMLWRTION 6K 4 B5U&A WIN& TIP CAP W/Y4XY8 PRUC PLC /X2 34 BALSA 3/x4 y QBRLA B1LA 8ItT x Y4 BL8A ThIS Fl eiB CONVEI NLCL 10 ELECTRIC RYJR ACE IThRNRTURPL 0LIVT CllN USEP RINDLY. MKE8 FO IiRPP NEIGORS _____ \ /. BELIEVE ira Left The fuselage rudder stabilizer covered painted prior assembly covering carefully cut away epoxy will applied final assembly photo tail section shows stabilizer ready positioned slot provided fu selage elevator rudder yet installed Right stabilizer place hinges attached elevator linkage hooked up elevator assembly installed stabilizer technique provides neat buried elevator horn minimum hassle graded bundles can lot wast age Hardware fittings standard hobby shop stock items / ply used window frames common stock ten used skinning foam wings cant beg scraps Pattern fliers club hobby shop doesnt carry order thin ply Sig Tail surfaces Since empennage structure involving out-of-the-ordinary construction methods well tackle first symmetrical tail surface sections em ployed original design must dupli cated model SAM legal plane will purely sport however can ignore SAM requirement case build surfaces /4 x A-in stock using conventional techniques Since believe building either flat surface jigs developed fol lowing method project Build flat work surface Trace outlines onto appropriately sized wood slipping car bon paper between plans wood point follow standard build ing techniques Pin down glue together -in sta bilizer elevator center sections Re move dry add 3/ x /16 strips both sides original ribs strips butt against 3/6-sq strips added top bottom hinge spars per plans Once pieces have glued place use sanding block create symmetrical air foil technique shown plan side view much easier shim ming outlines cutting out ribs Its also stronger lighter struc ture looks exactly same covered Wing As tail surfaces trace rib patterns balsa stock using carbon pa per Stack cut knife jigsaw carefully sand final shape Notching trailing edge rib interface adds strength Pin trailing edge over 28 Model Aviation Left Partially finished wing showing half-ribs leading edge rib outline drawings clarify laminated tips positioned slots create accurate tip assembly Half-ribs novel Old-Timer case re-create system Bowers used home built also allow smoother covering avoiding tendency sag Right Universal clamps clothespins being used hold three formers fuselage sides alignment before final cementing Use triangles squares flat surface ensures true fuselage Left Early stage wing construction Note laminated wing tip structure fits against spar ends accommodate upward taper wing Right photo shows simple foam board pattern used laminate wing tips author prefers laminating technique use bamboo dural wire Balsa basswood can used ease technique can used laminating applications NYLON MOTOR MOUNT TO SUrF3A6 PLYWOODI/B LITE PLYI/B LITE PLY MOTOR McKJNT FORCUT-OUT FORv SQ FOUR CYCLE ENGINE4 OZ SULLIVAN4SQ BALSA SS-4 FUEL TANKBALSA 3A6 PLYWOODOPTIONAL NOSE FOR/- LO CLIPSPLY FOUR CYCLE ENGINEI/B NYLONI/8LITE/1yLITE 1/4 3/4 3/IA PLYWOODBASSWOOD _______F- 4I F-2F-3LWe 3M BASSWOOD SASA ShEETI/B SIP MUSIC WIRE MOTOR MOUNT FOR ITU coness SelerminedVIEW FOR PLACEMENT OPTIONAL Engine ChoiceFODR CYCLE ENGINEIN ODNSTRUCTION FIREWALLLANDING GEAR DETAIL 1 40 FOUR CYCLE ENG 0 FOUR CYCLE 3/33 BALSA PLANKINGI/As 3/4 SASS RH T COWL PIECES 4 OZ TANKII SERVOS S LAYERS OF 3132 BALSA NOTE GRAIN SOAK IN SNBsIORIA 8 FORM TO UNDERSIDE OF WING-USE CYP B INSTALL DEFLECTIONS RUDOER S1OTAL NYLON MOTOR x - AELEVATOR L MOUNT 1/4 BALSA SHEET1/16 DIP MUSIC WIRE 0LS DIP MUSIC WIRE 0 FUSELAGE SIDE VIEWMODEL AVIATION 0015 CLEAR PLASTIC TRIM TO FITTHE ORIGINAL FLY BABY LT PETE BoWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS 0 2 3 4 5 5TRACING BY JOE DEMARCO WINDSHIELD PATTERNSHEET OF 2 RIGHTS RESERVED Full-Size Plans AvailableSee Page 196 plans position notches cut out jigsaw blade reversed visual reference Since x %-in balsa stock invariably seems warped its best laminate front wing spar spruce balsa Posi tion spruce top since bottom will flared tips wing tips laminated over foam board cardboard form Moisten balsa diluted ammonia water coat al iphatic resin such Sig Bond slowly pull sandwich end form other Use masking tape hold strips place set Youll find technique will result strong lightweight structure Once laminated wing tips dry pin slot cut trailing edge onto shaped spar faces Bevel bottom tip lamination fair trailing edge wing tips can also installed wing off board wary warping center section built integral part left wing panel Use center section rib pattern plan trim down three ribs before adding sheeting Use tilt jig plans establish dihedral angle right left wing panel base ribs sheeting will stalled after wing fitted fuse lage grabber also added later tilt jig used properly set center wing joint rib thats required block up wing tips carefully sand final dihedral angle Make sure three center section ribs absolutely vertical Join panel center section ep oxy along rib faces spar joints Clamp place until epoxy sets spring-type clothespins Repeat process other wing panel Using razor saw cut necessary slots ribs %2 ply dihedral brace wing joiner Epoxy place against back main spar Sand leading edge shape shown plan After final sanding check wing alignment set aside Fuselage Build side over other di rectly plans Use scraps masking tape glue joints prevent sticking Note longerons extend fire wall Dont cut off stubs glue curing cut out jig bulkheads F-2 F-3 Lite Ply prefer able bulkheads due its ease cut ting regular ply may substituted Lay bulkheads directly over plans glue CyA Trace off patterns firewall F-i bulkhead using carbon paper Cut notches fit precisely possible Pre bend landing gear wire drill strap screw holes dont install gear permanently time Separate two side units popping apart table knife Trim sand smooth Replace right side building surface weight down secure ly Trial fit four bulkhead units good joints place appropriate slots fuselage side Use carpenters square 900 triangle ensure perfect alignment youre satisfied glue place Place left side over bulkheads re peat alignment process glue side slots should now have 30 Model Aviation Len I ne two Vuselage sides built one-over-the-other barrier strips masking tape substituted classic waxed paper ladder formers landing gear installed notched assist alignment Right assembled fuselage graced beauty pe culiar stick-and-strip structures modern adhesives construction methods assemblies no longer difficult build i57j structure airplane completed point wing alignment simple piece string used assure proper alignment wing prior drilling hole trailing edge bolt Equal distance center fuselage tail same point wing tip will square wing fuselage Clamp securely drilling mounting hole model temporarily assembled its bare bones give idea its general arrange ment Notice antiflex brace pushrods position single wing bolt 4 LAMINATIONS OF I/l6 1/4 BALSA 3/32 BALSA SHEET C GRAIN 7 DIHEDRAL AT EACH WING TIP I/4BO BALSA LEADING EDGE PLAN LEFT SIDE 1/4 1/2 BALSA SPAR WITH I/4 I/B SPRUCE CAP Kr 1/4 BALSA TRAILING / EDGE STOCK WING RIB 3/32 BA5A SHEET CENTER SECT RIB WING TIP RIB 3/32 C-GRAIN RALSA HALF RIB 3/32 PLY DIHEDRAL 3/32 BALSA SHEET BRACE BLOCK SAND AFTER INSTAIING /4 BALSA SPAR BALSA GUSSET -77 3/32 BALSA RIBS B HALF RIBS SHIM UP 3/IN SHIM UP I/IN I/4 1/2 BALSA SPAR 3/32 PLY DIHED BRACE TILT JIG 7 1/4 50 BALSA LEASING EDGE 77 APW H B SPR E 1/4 BALSA SHEET 1/4 BALSA SHEET 1 TYPICALBALSA HINGE TOR MW JOINER1/4 3/B AND HORNBALSA 3/321/4 BALSA RIBS 3/22 BALSA HALF RIBS WING DIHEDRAL BREAK 3NP [KGRABBER -A PLANRIGHT SIDE 3/32 BALSA 1 - I/lB BALSA CENTER SECTION SHEETING TOP N BOTTOM 3/32 PLYWOOD —4 PIHEDRAL BRACE ~-BALSA GUSSETS --1/4 BASS OR PINE SHAPE TO MATCH T STOCK 7 DIHEDRAL AT EACH WING TIP 4 LAMINATIONS OF I/IN 1/4 BALSA-WING TIP I/4I BALSA TE STOCK 3/IN SO BALSA /4 BALSA SHEET UNSANDED 3/W3/B BALSA 7 3/32 3/IN BALSA FILLER3/32I/4 BASA SANDED FIN/RUDDER B STAB/ELEV CONSTRUCTION 3/IN PLYWOOD V4BALSA SHEET7 OUTLINE GRABBER NOTE SAM EGAL ENLARGEMENT OF 941 ROW- P F RECORD HOLSER I/4 3/B BALSA ENLARGED SO% AND CONVERTED TO N/C ENGINE 19 -25 TWO CYCLE ON 40 FOUR CYCLE SPAN 72 WING CHORD 10- AREA 700 50 IN SAM MIN WT 49 02 PROTOTYPE WT SI 02 POWER 31 CU IN 0345B MODEL AVIATION THE ORIGINAL FLY BABY Li PETE BOWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS TRACING BY OETEM~ ALL RIGHTS O SHEET 2 OF 2 Full-Size Plans AvailableSee Page 196 Kings Symbol Power Sceptor fly Sceptor youre King Hill Bushwacker Designed low power sport flyer Bushwacker flies well 15 20 size engine large wing area light wing loading make Bushwacker almost powered glider will surprise its performance Construction wood straight forward Due complexity recommend intermediate builderlflyer PRICESSuggested Retail Windrifter$ 7695 Bushwacker$ 7395 Mini Bird$ 5695 Stepp Two$ 4795 R V 4$10695 Folke WuIfe 190$10995 P-47 Master Scale$17495 Mystique$ 7995 SCEPTOR MODELS 1934 Comanche Street Oceanside California 92056 619-726-4971 box perfectly square fore aft well top bottom preferred method finishing rear section fuselage leave building board jack up tail post centerline exactly one-half fuselage width Using plan top view cut cross braces pairs install An alternate conventional technique position box wing saddle top view pull tail section gether over plan Regardless method used ensure fuselage straight along centerline Planking hatch area over fuel tank best accomplished stringy sheet balsa soaked ammonia water Using thick Hot Stuff attach sheet base curl up over bulkheads bead CyA opposite side installed same manner making joint top slicing through both halves straight edge Several cuts may required nice seam window frames cut / ply thickness commonly used cover foam wings Using plan guide trace patterns carefully cut out glue fuselage frames provide hidden seam installing clear plastic windows inside will done later using RC 56 An extra filler piece basswood pine now epoxied top F-3 crosspiece wing-seat front pieces will reinforce bracket grab ber tank seated Lite Ply floor plumbing running through engine mount cutout Standard throttle control ca ble used bottom sheeting sanded side taper before its installed thick Hot Stuff Several narrow strips can used lieu single sheet fuselage finished ready covering round longerons pleas ing shape sand nose blocks final shape thickness cheek blocks will vary depending engine installation Notice 25 two-stroke installation shown has thicker ones course thicker cheek blocks greater nose weightand narrower mount will necessarily Finally epoxy front dowel cabin roof Wing-fuselage assembly Drill Y16-dia hole exact center hardwood cen ter section trailing edge Its fore/aft location trailing edge based center hole Du-Bro bracket mounted exact center F-3 Bolt wing onto fuselage Clamp 3A 6 ply grabber against face dihedral brace After pinning end piece heavy string center rearmost fuselage use string check wing tips precisely equi distant Adjust grabber accordingly youre completely satisfied alignment epoxy permanently place 32 Model Aviation crptnr NDRI FiFES WHATEVER YOUR ABILITY THE WINDRIFTER MAKES YOUR FLYING EASIER DELUXE QUALITY KIT DIE CUT RIBS ALL HARDWARE INCLUDED SPOILER KIT INCLUDED Wing Span 2 pecel998 99ng Asee903 sq ro Lifting Sottace1042 sq n Wing Loading638 oz/tt FIpng wegttt4000 AotOlFell5l cthoot ballast Up 4 lbs ballast nap added concept grabber unique Fly Baby 72 have used success fully 12 different designs thus farand have yet see fail wild spins beginner however advised con sider using old-fashioned rubberbands fastening wing Once wing-fuselage assembly com pleted build forward cabin roof Trac ing outlines plan cut two pieces %2 balsa noticing grain direc tion soaked ammonia water laminated using thick Hot Stuff molded fit leading edge wing contour Make sure doesnt stick wing Reinstall wing fuselage adjust roof piece perfect fit glue perma nently fuselage Covering preferred method cover smallest pieces first MonoKote works well Cover fin rudder stabilizer elevator separately cut slots hinges Cover entire fuselage cut out stabilizer slot fin mounting area Similarly cover over windows cut away material installing clear plastic later Slide stabilizer its slot epoxy place after assuring proper midline horizontal-plane alignment Slip fin its slots adjust vertical alignment epoxy place Hinge rudder eleva tor sliding molded hinges pre cut slots securing toothpick segments Hot Stuff color trim model accom plished spraying red Poly-U onto MonoKote covering lightly buffing No 400 steel wool Sig Stripe-Rite makes excellent masking tape since %2 A-in tape will flex around curves quite easily Seal edges against fuel seepage brushing clear Sig Skybrite spray misted can held 12 surface Try smooth thin coat gives semitransparent effect contrasting trim done StripeRite tape sealed clear Skybrite vi nyl numbers purchased office supply store nose area tank com partment fuel-proofed clear Sky brite before painting Radio installation control Ny-Rod stiffened along its length cross members made up scrap balsa connector servo end soldered clev adjustable clevis attached horn control surfaces servos installed pair hardwood beams glued Lite Ply Hot Stuff battery installed bay between F-I F-2 first bay hind firewall easily accessed model balanced quite well RC com ponents positioned drawn Flying preflight testing home away added pressure flying Continued page 146 TM FUEL WIZZARD THE WORLDS FASTEST AND MOST CONVENIENT FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE * DURABLE FOR LONG LIFE FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS SUGGESTED RETAIL $ 995 NOW JUST $ 750 EPRINT PLEASE ENTER MY ORDER FOR FUEL WIZZARDS AT $ 750 POSTAGE PAID ENCLOSE CHECK OR MONEY ORDER NAME STREET ADDRESS___________________ APT NO________ CITY________________________ STATEZIP_______ SEND TO ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 4 DEALER INQUIRIES INVITED October 1989 33 SEE YOUR DEALER OR ORDER DIRECT FROM TILTS AD PRECISION MODEL PRODUCTS uzZZ7Is# Made U S BARSTOCK ALUMINUM SPINNERS Pan No Size TT-150-B .. 1-1/2 TT-175-B . 1-3/4 TT-200-B 11-225-B .. 21/4 11-226-B .. 2-1/4 FAI . TT-250-B . 2-1/2 TT-251-B . 2-1/2 FAI .. TT-275-B 3/4 TT-276-8 .. 2-3/4 FAI .. 11-300-B 11-301-BPAl TT-325-B . 3-1/4 TT-350-B /2 TT-375-B .. 3-3/4 11-400-B 4 RetailApprox PriceWeight $1395058 02 149509502 159510002 169516002 189515002 189519002 209517002 229522002 249520002 269526002 289525002 369534002 499547002 599552002 699557002 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add 5300 Per Spinner PROP NUT ADAPTORS Part No Size TT-140-A . 1/4-28 TT-147-A 4-28/7mm . TT-610-A 10mm TT-710-A 10mm TT-516-A '5/16-24 TT-518-A .. 5/16-24/8mm IT-BiD-A x 10mm TT-825-A . 8x 125mm TT-375-A3/8-24 TT-125-A x 125mm Retail Approx Price Weight $495 061 02 49506102 49506302 49508202 495 602 49507602 495076oz 495 .. 075 02 595 117 02 595 02 3 Pieces Nut Washer anti Machined Bushing Add S350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 other 357th alumnus Chuck Yeager alive well TV again again think single-seat Dornier-335 Air Space Museum Washington DCpossibly same wife Helen beginning push 70 pretty hard both still ac tive licensed pilots have dabbling RC several years am enclosing picture freehand scratch-builts little 50 Saito powered 514-pounderreferred Round big 13-lb 8footer named Mr Big Its powered Zenoah 23 Both fly very well Harvey Mace Ft Bragg CA Safety/Preston Continued page 22 letter stated story apparently first sur faced 1967 So happen prefer assem bling models components arc welding rather gluing also weareontact lenses dont alarmed saw warning National Newsletter Its just true Have another safe Fly Baby/Mathews Continued page 33 site Test range free surface movement deflections per plans engine carbure tor needle settings engine-on radio op eration Finally important make sure model balances slightly ward center-of-gravity shown plans Add ballast needed Dont fly model tail-heavy everything checks out OK Fly Baby ready big try field head wind add little right rudder advance throttle youre air borne 12 ft adding up elevator youre taking off downwind Remember climb rate func tion engine speed elevator Dont horse airplane around heavy-handedly gentle caresses thats needed Take model up bit throttle down dead slow Still isnt sinking much Find little thermal shut engine off Now isnt something kind flying too sedate taste try some slow-speed touch-andbumps Hows easy Did ever prettier Whatever style flying youll find Old-Timer will oblige Versatile brisk smooth responsive Fly Baby will exactly what want See yourself isnt up date Old-Timer could ask dB Facts/Abbott Continued page 35 erates Quiet whisper 20 dB Conversation 65 dB Loud orchestra 80 dB Start danger 90 dB Amplified rock band 110 dB Threshold pain 130 dB Federal agencies have established recom mended standards safe noise exposure eight hours per day 90 dB two hours per day 100 dB less one-quarter hour per day 115 dB Lets reexamine AMA FAI cri teria Current AMA90 dB 9 ft Old FAIl00 dB meter Current FAI98 dB three meters order compare recommenda tions need convert single distancein case 9 ft Thats easy enough involves converting meters feet meter ft applying inverse square law discussed above results Current AMA90 dB 9 ft Old FAI912 dB 9 ft Current FAI988 dB 9 ft As can see new FAI regulation considerably less stringent old 146 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManse K&B FUELS K&B Glow PLUGS 9 Blends4 Choices Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co Electric Motors Rubber Tissue Cox Parts Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 Letters Editor Continued page 12 V
Edition: Model Aviation - 1989/10
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 146
NO OCR TEXT NO OCR TEXT delight Just thought enlarging design seems strengthen its inherent esthetics Little wonder Bowers plagia rized earlier design using same sur face outlines time came de velop entry FAA home-built mar ket outlines dimensions totally SAM legal model blown up com mercial blueprinter using photo enlarger requirements modern RC gear dic tated several structural changes Also developed unusual much simpler sys tem building symmetrical sectioned tail surfaces Two-stroke power adequate Fly Baby prototype has flown both Fox I9BB OS 25 FSR though model could also le gally powered 30 An OS 40 fourcycle engine proved delight 40 four-stroke still legal since SAM rules count 60% four-stroke displacement compared two-stroke Though Fly Baby has yet flown floats illustrated 1945 Model Airplane News article plan try ap proach Should 72-in version prove delightful flying off water air will very likely publish enlarged float plans later date floats model absolute doll Slow speed flight characteris tics outstandingitll almost fly back wards wind Thermaling ability ex cellent Fly Baby will ride very light lift ease Because its steep dihedral will turn tightly strong thermal no tendency spin out Fly Baby 72 also excels sport role has incredibly short takeoff roll good control model flies docilely please 35% power yet will climb like bandit firewall Landings slow controlled bad pilot looks good model does loops spins lovely stall turns making flying re laxed fun experience model good Pete Bowers Fly Baby can get better transla tion Larger easier track orig inal radio controlled greater versatility utility offering new easier con struction techniques updated model makes hard-to-beat choice Old-Timer flying Whether youre going all-out competition just plain old fun-flying rundont walkto workbench Construction As drawn Fly Baby about minimum weight strength youll using model exclusively sport flying consider strengthening substituting spruce wing spars fu selage longerons increased weight would however somewhat reduce mod els slow speed performance characteristics novice RC fliers tendency fly solid objects single dowel front double post rear cabin rubberbanding wing would advisable grabber system shown plans sufficiently strong under normal use damage cabin roof could oc cur wing tip strike anything solid recommend using thick-grade Hot Stuff cyanoacrylate CyA adhesive project Five-minute epoxy works best ply-to-balsa joints wood sizes standard stock Light weight C-grain sheet ideal Beware un 26 Model Aviation Based color trim scheme Bowers used original full-scale home-built Fly Baby RC model generates quite large head turning quotient dressed its bright yellowand-red transparent polyurethane covering covering technique discussed text Inc siaoiiizer seciion ouiit flat men yiiier sheets added sanded symmetri cal section tried-and-true method constructing truly warp-tree structure Also shown rudder control horn Left A wide range power 20 40 can used model minor modifications 19 engine shown proved ideal choice very smooth idle adequate power Right Close-up servo mounting arrangementAce Bantam ser vos tray Note dowel cabin front part wing attachment setup dowel slides grabber arrangement wing leading edge single nylon bolt through trailing edge screws Du-Bro fitting secure wing position Very simple strong WILWJ ~Yf E PETE OWER VIA DOC MA1ThEW& BALOA ~QBAL&A Ysz BJ1LR PLANKING 25 ENGI~ BRLA Y8 DIA MUSIC diR 3 WHLO . 4 LAMLWRTION 6K 4 B5U&A WIN& TIP CAP W/Y4XY8 PRUC PLC /X2 34 BALSA 3/x4 y QBRLA B1LA 8ItT x Y4 BL8A ThIS Fl eiB CONVEI NLCL 10 ELECTRIC RYJR ACE IThRNRTURPL 0LIVT CllN USEP RINDLY. MKE8 FO IiRPP NEIGORS _____ \ /. BELIEVE ira Left The fuselage rudder stabilizer covered painted prior assembly covering carefully cut away epoxy will applied final assembly photo tail section shows stabilizer ready positioned slot provided fu selage elevator rudder yet installed Right stabilizer place hinges attached elevator linkage hooked up elevator assembly installed stabilizer technique provides neat buried elevator horn minimum hassle graded bundles can lot wast age Hardware fittings standard hobby shop stock items / ply used window frames common stock ten used skinning foam wings cant beg scraps Pattern fliers club hobby shop doesnt carry order thin ply Sig Tail surfaces Since empennage structure involving out-of-the-ordinary construction methods well tackle first symmetrical tail surface sections em ployed original design must dupli cated model SAM legal plane will purely sport however can ignore SAM requirement case build surfaces /4 x A-in stock using conventional techniques Since believe building either flat surface jigs developed fol lowing method project Build flat work surface Trace outlines onto appropriately sized wood slipping car bon paper between plans wood point follow standard build ing techniques Pin down glue together -in sta bilizer elevator center sections Re move dry add 3/ x /16 strips both sides original ribs strips butt against 3/6-sq strips added top bottom hinge spars per plans Once pieces have glued place use sanding block create symmetrical air foil technique shown plan side view much easier shim ming outlines cutting out ribs Its also stronger lighter struc ture looks exactly same covered Wing As tail surfaces trace rib patterns balsa stock using carbon pa per Stack cut knife jigsaw carefully sand final shape Notching trailing edge rib interface adds strength Pin trailing edge over 28 Model Aviation Left Partially finished wing showing half-ribs leading edge rib outline drawings clarify laminated tips positioned slots create accurate tip assembly Half-ribs novel Old-Timer case re-create system Bowers used home built also allow smoother covering avoiding tendency sag Right Universal clamps clothespins being used hold three formers fuselage sides alignment before final cementing Use triangles squares flat surface ensures true fuselage Left Early stage wing construction Note laminated wing tip structure fits against spar ends accommodate upward taper wing Right photo shows simple foam board pattern used laminate wing tips author prefers laminating technique use bamboo dural wire Balsa basswood can used ease technique can used laminating applications NYLON MOTOR MOUNT TO SUrF3A6 PLYWOODI/B LITE PLYI/B LITE PLY MOTOR McKJNT FORCUT-OUT FORv SQ FOUR CYCLE ENGINE4 OZ SULLIVAN4SQ BALSA SS-4 FUEL TANKBALSA 3A6 PLYWOODOPTIONAL NOSE FOR/- LO CLIPSPLY FOUR CYCLE ENGINEI/B NYLONI/8LITE/1yLITE 1/4 3/4 3/IA PLYWOODBASSWOOD _______F- 4I F-2F-3LWe 3M BASSWOOD SASA ShEETI/B SIP MUSIC WIRE MOTOR MOUNT FOR ITU coness SelerminedVIEW FOR PLACEMENT OPTIONAL Engine ChoiceFODR CYCLE ENGINEIN ODNSTRUCTION FIREWALLLANDING GEAR DETAIL 1 40 FOUR CYCLE ENG 0 FOUR CYCLE 3/33 BALSA PLANKINGI/As 3/4 SASS RH T COWL PIECES 4 OZ TANKII SERVOS S LAYERS OF 3132 BALSA NOTE GRAIN SOAK IN SNBsIORIA 8 FORM TO UNDERSIDE OF WING-USE CYP B INSTALL DEFLECTIONS RUDOER S1OTAL NYLON MOTOR x - AELEVATOR L MOUNT 1/4 BALSA SHEET1/16 DIP MUSIC WIRE 0LS DIP MUSIC WIRE 0 FUSELAGE SIDE VIEWMODEL AVIATION 0015 CLEAR PLASTIC TRIM TO FITTHE ORIGINAL FLY BABY LT PETE BoWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS 0 2 3 4 5 5TRACING BY JOE DEMARCO WINDSHIELD PATTERNSHEET OF 2 RIGHTS RESERVED Full-Size Plans AvailableSee Page 196 plans position notches cut out jigsaw blade reversed visual reference Since x %-in balsa stock invariably seems warped its best laminate front wing spar spruce balsa Posi tion spruce top since bottom will flared tips wing tips laminated over foam board cardboard form Moisten balsa diluted ammonia water coat al iphatic resin such Sig Bond slowly pull sandwich end form other Use masking tape hold strips place set Youll find technique will result strong lightweight structure Once laminated wing tips dry pin slot cut trailing edge onto shaped spar faces Bevel bottom tip lamination fair trailing edge wing tips can also installed wing off board wary warping center section built integral part left wing panel Use center section rib pattern plan trim down three ribs before adding sheeting Use tilt jig plans establish dihedral angle right left wing panel base ribs sheeting will stalled after wing fitted fuse lage grabber also added later tilt jig used properly set center wing joint rib thats required block up wing tips carefully sand final dihedral angle Make sure three center section ribs absolutely vertical Join panel center section ep oxy along rib faces spar joints Clamp place until epoxy sets spring-type clothespins Repeat process other wing panel Using razor saw cut necessary slots ribs %2 ply dihedral brace wing joiner Epoxy place against back main spar Sand leading edge shape shown plan After final sanding check wing alignment set aside Fuselage Build side over other di rectly plans Use scraps masking tape glue joints prevent sticking Note longerons extend fire wall Dont cut off stubs glue curing cut out jig bulkheads F-2 F-3 Lite Ply prefer able bulkheads due its ease cut ting regular ply may substituted Lay bulkheads directly over plans glue CyA Trace off patterns firewall F-i bulkhead using carbon paper Cut notches fit precisely possible Pre bend landing gear wire drill strap screw holes dont install gear permanently time Separate two side units popping apart table knife Trim sand smooth Replace right side building surface weight down secure ly Trial fit four bulkhead units good joints place appropriate slots fuselage side Use carpenters square 900 triangle ensure perfect alignment youre satisfied glue place Place left side over bulkheads re peat alignment process glue side slots should now have 30 Model Aviation Len I ne two Vuselage sides built one-over-the-other barrier strips masking tape substituted classic waxed paper ladder formers landing gear installed notched assist alignment Right assembled fuselage graced beauty pe culiar stick-and-strip structures modern adhesives construction methods assemblies no longer difficult build i57j structure airplane completed point wing alignment simple piece string used assure proper alignment wing prior drilling hole trailing edge bolt Equal distance center fuselage tail same point wing tip will square wing fuselage Clamp securely drilling mounting hole model temporarily assembled its bare bones give idea its general arrange ment Notice antiflex brace pushrods position single wing bolt 4 LAMINATIONS OF I/l6 1/4 BALSA 3/32 BALSA SHEET C GRAIN 7 DIHEDRAL AT EACH WING TIP I/4BO BALSA LEADING EDGE PLAN LEFT SIDE 1/4 1/2 BALSA SPAR WITH I/4 I/B SPRUCE CAP Kr 1/4 BALSA TRAILING / EDGE STOCK WING RIB 3/32 BA5A SHEET CENTER SECT RIB WING TIP RIB 3/32 C-GRAIN RALSA HALF RIB 3/32 PLY DIHEDRAL 3/32 BALSA SHEET BRACE BLOCK SAND AFTER INSTAIING /4 BALSA SPAR BALSA GUSSET -77 3/32 BALSA RIBS B HALF RIBS SHIM UP 3/IN SHIM UP I/IN I/4 1/2 BALSA SPAR 3/32 PLY DIHED BRACE TILT JIG 7 1/4 50 BALSA LEASING EDGE 77 APW H B SPR E 1/4 BALSA SHEET 1/4 BALSA SHEET 1 TYPICALBALSA HINGE TOR MW JOINER1/4 3/B AND HORNBALSA 3/321/4 BALSA RIBS 3/22 BALSA HALF RIBS WING DIHEDRAL BREAK 3NP [KGRABBER -A PLANRIGHT SIDE 3/32 BALSA 1 - I/lB BALSA CENTER SECTION SHEETING TOP N BOTTOM 3/32 PLYWOOD —4 PIHEDRAL BRACE ~-BALSA GUSSETS --1/4 BASS OR PINE SHAPE TO MATCH T STOCK 7 DIHEDRAL AT EACH WING TIP 4 LAMINATIONS OF I/IN 1/4 BALSA-WING TIP I/4I BALSA TE STOCK 3/IN SO BALSA /4 BALSA SHEET UNSANDED 3/W3/B BALSA 7 3/32 3/IN BALSA FILLER3/32I/4 BASA SANDED FIN/RUDDER B STAB/ELEV CONSTRUCTION 3/IN PLYWOOD V4BALSA SHEET7 OUTLINE GRABBER NOTE SAM EGAL ENLARGEMENT OF 941 ROW- P F RECORD HOLSER I/4 3/B BALSA ENLARGED SO% AND CONVERTED TO N/C ENGINE 19 -25 TWO CYCLE ON 40 FOUR CYCLE SPAN 72 WING CHORD 10- AREA 700 50 IN SAM MIN WT 49 02 PROTOTYPE WT SI 02 POWER 31 CU IN 0345B MODEL AVIATION THE ORIGINAL FLY BABY Li PETE BOWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS TRACING BY OETEM~ ALL RIGHTS O SHEET 2 OF 2 Full-Size Plans AvailableSee Page 196 Kings Symbol Power Sceptor fly Sceptor youre King Hill Bushwacker Designed low power sport flyer Bushwacker flies well 15 20 size engine large wing area light wing loading make Bushwacker almost powered glider will surprise its performance Construction wood straight forward Due complexity recommend intermediate builderlflyer PRICESSuggested Retail Windrifter$ 7695 Bushwacker$ 7395 Mini Bird$ 5695 Stepp Two$ 4795 R V 4$10695 Folke WuIfe 190$10995 P-47 Master Scale$17495 Mystique$ 7995 SCEPTOR MODELS 1934 Comanche Street Oceanside California 92056 619-726-4971 box perfectly square fore aft well top bottom preferred method finishing rear section fuselage leave building board jack up tail post centerline exactly one-half fuselage width Using plan top view cut cross braces pairs install An alternate conventional technique position box wing saddle top view pull tail section gether over plan Regardless method used ensure fuselage straight along centerline Planking hatch area over fuel tank best accomplished stringy sheet balsa soaked ammonia water Using thick Hot Stuff attach sheet base curl up over bulkheads bead CyA opposite side installed same manner making joint top slicing through both halves straight edge Several cuts may required nice seam window frames cut / ply thickness commonly used cover foam wings Using plan guide trace patterns carefully cut out glue fuselage frames provide hidden seam installing clear plastic windows inside will done later using RC 56 An extra filler piece basswood pine now epoxied top F-3 crosspiece wing-seat front pieces will reinforce bracket grab ber tank seated Lite Ply floor plumbing running through engine mount cutout Standard throttle control ca ble used bottom sheeting sanded side taper before its installed thick Hot Stuff Several narrow strips can used lieu single sheet fuselage finished ready covering round longerons pleas ing shape sand nose blocks final shape thickness cheek blocks will vary depending engine installation Notice 25 two-stroke installation shown has thicker ones course thicker cheek blocks greater nose weightand narrower mount will necessarily Finally epoxy front dowel cabin roof Wing-fuselage assembly Drill Y16-dia hole exact center hardwood cen ter section trailing edge Its fore/aft location trailing edge based center hole Du-Bro bracket mounted exact center F-3 Bolt wing onto fuselage Clamp 3A 6 ply grabber against face dihedral brace After pinning end piece heavy string center rearmost fuselage use string check wing tips precisely equi distant Adjust grabber accordingly youre completely satisfied alignment epoxy permanently place 32 Model Aviation crptnr NDRI FiFES WHATEVER YOUR ABILITY THE WINDRIFTER MAKES YOUR FLYING EASIER DELUXE QUALITY KIT DIE CUT RIBS ALL HARDWARE INCLUDED SPOILER KIT INCLUDED Wing Span 2 pecel998 99ng Asee903 sq ro Lifting Sottace1042 sq n Wing Loading638 oz/tt FIpng wegttt4000 AotOlFell5l cthoot ballast Up 4 lbs ballast nap added concept grabber unique Fly Baby 72 have used success fully 12 different designs thus farand have yet see fail wild spins beginner however advised con sider using old-fashioned rubberbands fastening wing Once wing-fuselage assembly com pleted build forward cabin roof Trac ing outlines plan cut two pieces %2 balsa noticing grain direc tion soaked ammonia water laminated using thick Hot Stuff molded fit leading edge wing contour Make sure doesnt stick wing Reinstall wing fuselage adjust roof piece perfect fit glue perma nently fuselage Covering preferred method cover smallest pieces first MonoKote works well Cover fin rudder stabilizer elevator separately cut slots hinges Cover entire fuselage cut out stabilizer slot fin mounting area Similarly cover over windows cut away material installing clear plastic later Slide stabilizer its slot epoxy place after assuring proper midline horizontal-plane alignment Slip fin its slots adjust vertical alignment epoxy place Hinge rudder eleva tor sliding molded hinges pre cut slots securing toothpick segments Hot Stuff color trim model accom plished spraying red Poly-U onto MonoKote covering lightly buffing No 400 steel wool Sig Stripe-Rite makes excellent masking tape since %2 A-in tape will flex around curves quite easily Seal edges against fuel seepage brushing clear Sig Skybrite spray misted can held 12 surface Try smooth thin coat gives semitransparent effect contrasting trim done StripeRite tape sealed clear Skybrite vi nyl numbers purchased office supply store nose area tank com partment fuel-proofed clear Sky brite before painting Radio installation control Ny-Rod stiffened along its length cross members made up scrap balsa connector servo end soldered clev adjustable clevis attached horn control surfaces servos installed pair hardwood beams glued Lite Ply Hot Stuff battery installed bay between F-I F-2 first bay hind firewall easily accessed model balanced quite well RC com ponents positioned drawn Flying preflight testing home away added pressure flying Continued page 146 TM FUEL WIZZARD THE WORLDS FASTEST AND MOST CONVENIENT FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE * DURABLE FOR LONG LIFE FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS SUGGESTED RETAIL $ 995 NOW JUST $ 750 EPRINT PLEASE ENTER MY ORDER FOR FUEL WIZZARDS AT $ 750 POSTAGE PAID ENCLOSE CHECK OR MONEY ORDER NAME STREET ADDRESS___________________ APT NO________ CITY________________________ STATEZIP_______ SEND TO ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 4 DEALER INQUIRIES INVITED October 1989 33 SEE YOUR DEALER OR ORDER DIRECT FROM TILTS AD PRECISION MODEL PRODUCTS uzZZ7Is# Made U S BARSTOCK ALUMINUM SPINNERS Pan No Size TT-150-B .. 1-1/2 TT-175-B . 1-3/4 TT-200-B 11-225-B .. 21/4 11-226-B .. 2-1/4 FAI . TT-250-B . 2-1/2 TT-251-B . 2-1/2 FAI .. TT-275-B 3/4 TT-276-8 .. 2-3/4 FAI .. 11-300-B 11-301-BPAl TT-325-B . 3-1/4 TT-350-B /2 TT-375-B .. 3-3/4 11-400-B 4 RetailApprox PriceWeight $1395058 02 149509502 159510002 169516002 189515002 189519002 209517002 229522002 249520002 269526002 289525002 369534002 499547002 599552002 699557002 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add 5300 Per Spinner PROP NUT ADAPTORS Part No Size TT-140-A . 1/4-28 TT-147-A 4-28/7mm . TT-610-A 10mm TT-710-A 10mm TT-516-A '5/16-24 TT-518-A .. 5/16-24/8mm IT-BiD-A x 10mm TT-825-A . 8x 125mm TT-375-A3/8-24 TT-125-A x 125mm Retail Approx Price Weight $495 061 02 49506102 49506302 49508202 495 602 49507602 495076oz 495 .. 075 02 595 117 02 595 02 3 Pieces Nut Washer anti Machined Bushing Add S350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 other 357th alumnus Chuck Yeager alive well TV again again think single-seat Dornier-335 Air Space Museum Washington DCpossibly same wife Helen beginning push 70 pretty hard both still ac tive licensed pilots have dabbling RC several years am enclosing picture freehand scratch-builts little 50 Saito powered 514-pounderreferred Round big 13-lb 8footer named Mr Big Its powered Zenoah 23 Both fly very well Harvey Mace Ft Bragg CA Safety/Preston Continued page 22 letter stated story apparently first sur faced 1967 So happen prefer assem bling models components arc welding rather gluing also weareontact lenses dont alarmed saw warning National Newsletter Its just true Have another safe Fly Baby/Mathews Continued page 33 site Test range free surface movement deflections per plans engine carbure tor needle settings engine-on radio op eration Finally important make sure model balances slightly ward center-of-gravity shown plans Add ballast needed Dont fly model tail-heavy everything checks out OK Fly Baby ready big try field head wind add little right rudder advance throttle youre air borne 12 ft adding up elevator youre taking off downwind Remember climb rate func tion engine speed elevator Dont horse airplane around heavy-handedly gentle caresses thats needed Take model up bit throttle down dead slow Still isnt sinking much Find little thermal shut engine off Now isnt something kind flying too sedate taste try some slow-speed touch-andbumps Hows easy Did ever prettier Whatever style flying youll find Old-Timer will oblige Versatile brisk smooth responsive Fly Baby will exactly what want See yourself isnt up date Old-Timer could ask dB Facts/Abbott Continued page 35 erates Quiet whisper 20 dB Conversation 65 dB Loud orchestra 80 dB Start danger 90 dB Amplified rock band 110 dB Threshold pain 130 dB Federal agencies have established recom mended standards safe noise exposure eight hours per day 90 dB two hours per day 100 dB less one-quarter hour per day 115 dB Lets reexamine AMA FAI cri teria Current AMA90 dB 9 ft Old FAIl00 dB meter Current FAI98 dB three meters order compare recommenda tions need convert single distancein case 9 ft Thats easy enough involves converting meters feet meter ft applying inverse square law discussed above results Current AMA90 dB 9 ft Old FAI912 dB 9 ft Current FAI988 dB 9 ft As can see new FAI regulation considerably less stringent old 146 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManse K&B FUELS K&B Glow PLUGS 9 Blends4 Choices Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co Electric Motors Rubber Tissue Cox Parts Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 Letters Editor Continued page 12 V
Edition: Model Aviation - 1989/10
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 146
NO OCR TEXT NO OCR TEXT delight Just thought enlarging design seems strengthen its inherent esthetics Little wonder Bowers plagia rized earlier design using same sur face outlines time came de velop entry FAA home-built mar ket outlines dimensions totally SAM legal model blown up com mercial blueprinter using photo enlarger requirements modern RC gear dic tated several structural changes Also developed unusual much simpler sys tem building symmetrical sectioned tail surfaces Two-stroke power adequate Fly Baby prototype has flown both Fox I9BB OS 25 FSR though model could also le gally powered 30 An OS 40 fourcycle engine proved delight 40 four-stroke still legal since SAM rules count 60% four-stroke displacement compared two-stroke Though Fly Baby has yet flown floats illustrated 1945 Model Airplane News article plan try ap proach Should 72-in version prove delightful flying off water air will very likely publish enlarged float plans later date floats model absolute doll Slow speed flight characteris tics outstandingitll almost fly back wards wind Thermaling ability ex cellent Fly Baby will ride very light lift ease Because its steep dihedral will turn tightly strong thermal no tendency spin out Fly Baby 72 also excels sport role has incredibly short takeoff roll good control model flies docilely please 35% power yet will climb like bandit firewall Landings slow controlled bad pilot looks good model does loops spins lovely stall turns making flying re laxed fun experience model good Pete Bowers Fly Baby can get better transla tion Larger easier track orig inal radio controlled greater versatility utility offering new easier con struction techniques updated model makes hard-to-beat choice Old-Timer flying Whether youre going all-out competition just plain old fun-flying rundont walkto workbench Construction As drawn Fly Baby about minimum weight strength youll using model exclusively sport flying consider strengthening substituting spruce wing spars fu selage longerons increased weight would however somewhat reduce mod els slow speed performance characteristics novice RC fliers tendency fly solid objects single dowel front double post rear cabin rubberbanding wing would advisable grabber system shown plans sufficiently strong under normal use damage cabin roof could oc cur wing tip strike anything solid recommend using thick-grade Hot Stuff cyanoacrylate CyA adhesive project Five-minute epoxy works best ply-to-balsa joints wood sizes standard stock Light weight C-grain sheet ideal Beware un 26 Model Aviation Based color trim scheme Bowers used original full-scale home-built Fly Baby RC model generates quite large head turning quotient dressed its bright yellowand-red transparent polyurethane covering covering technique discussed text Inc siaoiiizer seciion ouiit flat men yiiier sheets added sanded symmetri cal section tried-and-true method constructing truly warp-tree structure Also shown rudder control horn Left A wide range power 20 40 can used model minor modifications 19 engine shown proved ideal choice very smooth idle adequate power Right Close-up servo mounting arrangementAce Bantam ser vos tray Note dowel cabin front part wing attachment setup dowel slides grabber arrangement wing leading edge single nylon bolt through trailing edge screws Du-Bro fitting secure wing position Very simple strong WILWJ ~Yf E PETE OWER VIA DOC MA1ThEW& BALOA ~QBAL&A Ysz BJ1LR PLANKING 25 ENGI~ BRLA Y8 DIA MUSIC diR 3 WHLO . 4 LAMLWRTION 6K 4 B5U&A WIN& TIP CAP W/Y4XY8 PRUC PLC /X2 34 BALSA 3/x4 y QBRLA B1LA 8ItT x Y4 BL8A ThIS Fl eiB CONVEI NLCL 10 ELECTRIC RYJR ACE IThRNRTURPL 0LIVT CllN USEP RINDLY. MKE8 FO IiRPP NEIGORS _____ \ /. BELIEVE ira Left The fuselage rudder stabilizer covered painted prior assembly covering carefully cut away epoxy will applied final assembly photo tail section shows stabilizer ready positioned slot provided fu selage elevator rudder yet installed Right stabilizer place hinges attached elevator linkage hooked up elevator assembly installed stabilizer technique provides neat buried elevator horn minimum hassle graded bundles can lot wast age Hardware fittings standard hobby shop stock items / ply used window frames common stock ten used skinning foam wings cant beg scraps Pattern fliers club hobby shop doesnt carry order thin ply Sig Tail surfaces Since empennage structure involving out-of-the-ordinary construction methods well tackle first symmetrical tail surface sections em ployed original design must dupli cated model SAM legal plane will purely sport however can ignore SAM requirement case build surfaces /4 x A-in stock using conventional techniques Since believe building either flat surface jigs developed fol lowing method project Build flat work surface Trace outlines onto appropriately sized wood slipping car bon paper between plans wood point follow standard build ing techniques Pin down glue together -in sta bilizer elevator center sections Re move dry add 3/ x /16 strips both sides original ribs strips butt against 3/6-sq strips added top bottom hinge spars per plans Once pieces have glued place use sanding block create symmetrical air foil technique shown plan side view much easier shim ming outlines cutting out ribs Its also stronger lighter struc ture looks exactly same covered Wing As tail surfaces trace rib patterns balsa stock using carbon pa per Stack cut knife jigsaw carefully sand final shape Notching trailing edge rib interface adds strength Pin trailing edge over 28 Model Aviation Left Partially finished wing showing half-ribs leading edge rib outline drawings clarify laminated tips positioned slots create accurate tip assembly Half-ribs novel Old-Timer case re-create system Bowers used home built also allow smoother covering avoiding tendency sag Right Universal clamps clothespins being used hold three formers fuselage sides alignment before final cementing Use triangles squares flat surface ensures true fuselage Left Early stage wing construction Note laminated wing tip structure fits against spar ends accommodate upward taper wing Right photo shows simple foam board pattern used laminate wing tips author prefers laminating technique use bamboo dural wire Balsa basswood can used ease technique can used laminating applications NYLON MOTOR MOUNT TO SUrF3A6 PLYWOODI/B LITE PLYI/B LITE PLY MOTOR McKJNT FORCUT-OUT FORv SQ FOUR CYCLE ENGINE4 OZ SULLIVAN4SQ BALSA SS-4 FUEL TANKBALSA 3A6 PLYWOODOPTIONAL NOSE FOR/- LO CLIPSPLY FOUR CYCLE ENGINEI/B NYLONI/8LITE/1yLITE 1/4 3/4 3/IA PLYWOODBASSWOOD _______F- 4I F-2F-3LWe 3M BASSWOOD SASA ShEETI/B SIP MUSIC WIRE MOTOR MOUNT FOR ITU coness SelerminedVIEW FOR PLACEMENT OPTIONAL Engine ChoiceFODR CYCLE ENGINEIN ODNSTRUCTION FIREWALLLANDING GEAR DETAIL 1 40 FOUR CYCLE ENG 0 FOUR CYCLE 3/33 BALSA PLANKINGI/As 3/4 SASS RH T COWL PIECES 4 OZ TANKII SERVOS S LAYERS OF 3132 BALSA NOTE GRAIN SOAK IN SNBsIORIA 8 FORM TO UNDERSIDE OF WING-USE CYP B INSTALL DEFLECTIONS RUDOER S1OTAL NYLON MOTOR x - AELEVATOR L MOUNT 1/4 BALSA SHEET1/16 DIP MUSIC WIRE 0LS DIP MUSIC WIRE 0 FUSELAGE SIDE VIEWMODEL AVIATION 0015 CLEAR PLASTIC TRIM TO FITTHE ORIGINAL FLY BABY LT PETE BoWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS 0 2 3 4 5 5TRACING BY JOE DEMARCO WINDSHIELD PATTERNSHEET OF 2 RIGHTS RESERVED Full-Size Plans AvailableSee Page 196 plans position notches cut out jigsaw blade reversed visual reference Since x %-in balsa stock invariably seems warped its best laminate front wing spar spruce balsa Posi tion spruce top since bottom will flared tips wing tips laminated over foam board cardboard form Moisten balsa diluted ammonia water coat al iphatic resin such Sig Bond slowly pull sandwich end form other Use masking tape hold strips place set Youll find technique will result strong lightweight structure Once laminated wing tips dry pin slot cut trailing edge onto shaped spar faces Bevel bottom tip lamination fair trailing edge wing tips can also installed wing off board wary warping center section built integral part left wing panel Use center section rib pattern plan trim down three ribs before adding sheeting Use tilt jig plans establish dihedral angle right left wing panel base ribs sheeting will stalled after wing fitted fuse lage grabber also added later tilt jig used properly set center wing joint rib thats required block up wing tips carefully sand final dihedral angle Make sure three center section ribs absolutely vertical Join panel center section ep oxy along rib faces spar joints Clamp place until epoxy sets spring-type clothespins Repeat process other wing panel Using razor saw cut necessary slots ribs %2 ply dihedral brace wing joiner Epoxy place against back main spar Sand leading edge shape shown plan After final sanding check wing alignment set aside Fuselage Build side over other di rectly plans Use scraps masking tape glue joints prevent sticking Note longerons extend fire wall Dont cut off stubs glue curing cut out jig bulkheads F-2 F-3 Lite Ply prefer able bulkheads due its ease cut ting regular ply may substituted Lay bulkheads directly over plans glue CyA Trace off patterns firewall F-i bulkhead using carbon paper Cut notches fit precisely possible Pre bend landing gear wire drill strap screw holes dont install gear permanently time Separate two side units popping apart table knife Trim sand smooth Replace right side building surface weight down secure ly Trial fit four bulkhead units good joints place appropriate slots fuselage side Use carpenters square 900 triangle ensure perfect alignment youre satisfied glue place Place left side over bulkheads re peat alignment process glue side slots should now have 30 Model Aviation Len I ne two Vuselage sides built one-over-the-other barrier strips masking tape substituted classic waxed paper ladder formers landing gear installed notched assist alignment Right assembled fuselage graced beauty pe culiar stick-and-strip structures modern adhesives construction methods assemblies no longer difficult build i57j structure airplane completed point wing alignment simple piece string used assure proper alignment wing prior drilling hole trailing edge bolt Equal distance center fuselage tail same point wing tip will square wing fuselage Clamp securely drilling mounting hole model temporarily assembled its bare bones give idea its general arrange ment Notice antiflex brace pushrods position single wing bolt 4 LAMINATIONS OF I/l6 1/4 BALSA 3/32 BALSA SHEET C GRAIN 7 DIHEDRAL AT EACH WING TIP I/4BO BALSA LEADING EDGE PLAN LEFT SIDE 1/4 1/2 BALSA SPAR WITH I/4 I/B SPRUCE CAP Kr 1/4 BALSA TRAILING / EDGE STOCK WING RIB 3/32 BA5A SHEET CENTER SECT RIB WING TIP RIB 3/32 C-GRAIN RALSA HALF RIB 3/32 PLY DIHEDRAL 3/32 BALSA SHEET BRACE BLOCK SAND AFTER INSTAIING /4 BALSA SPAR BALSA GUSSET -77 3/32 BALSA RIBS B HALF RIBS SHIM UP 3/IN SHIM UP I/IN I/4 1/2 BALSA SPAR 3/32 PLY DIHED BRACE TILT JIG 7 1/4 50 BALSA LEASING EDGE 77 APW H B SPR E 1/4 BALSA SHEET 1/4 BALSA SHEET 1 TYPICALBALSA HINGE TOR MW JOINER1/4 3/B AND HORNBALSA 3/321/4 BALSA RIBS 3/22 BALSA HALF RIBS WING DIHEDRAL BREAK 3NP [KGRABBER -A PLANRIGHT SIDE 3/32 BALSA 1 - I/lB BALSA CENTER SECTION SHEETING TOP N BOTTOM 3/32 PLYWOOD —4 PIHEDRAL BRACE ~-BALSA GUSSETS --1/4 BASS OR PINE SHAPE TO MATCH T STOCK 7 DIHEDRAL AT EACH WING TIP 4 LAMINATIONS OF I/IN 1/4 BALSA-WING TIP I/4I BALSA TE STOCK 3/IN SO BALSA /4 BALSA SHEET UNSANDED 3/W3/B BALSA 7 3/32 3/IN BALSA FILLER3/32I/4 BASA SANDED FIN/RUDDER B STAB/ELEV CONSTRUCTION 3/IN PLYWOOD V4BALSA SHEET7 OUTLINE GRABBER NOTE SAM EGAL ENLARGEMENT OF 941 ROW- P F RECORD HOLSER I/4 3/B BALSA ENLARGED SO% AND CONVERTED TO N/C ENGINE 19 -25 TWO CYCLE ON 40 FOUR CYCLE SPAN 72 WING CHORD 10- AREA 700 50 IN SAM MIN WT 49 02 PROTOTYPE WT SI 02 POWER 31 CU IN 0345B MODEL AVIATION THE ORIGINAL FLY BABY Li PETE BOWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS TRACING BY OETEM~ ALL RIGHTS O SHEET 2 OF 2 Full-Size Plans AvailableSee Page 196 Kings Symbol Power Sceptor fly Sceptor youre King Hill Bushwacker Designed low power sport flyer Bushwacker flies well 15 20 size engine large wing area light wing loading make Bushwacker almost powered glider will surprise its performance Construction wood straight forward Due complexity recommend intermediate builderlflyer PRICESSuggested Retail Windrifter$ 7695 Bushwacker$ 7395 Mini Bird$ 5695 Stepp Two$ 4795 R V 4$10695 Folke WuIfe 190$10995 P-47 Master Scale$17495 Mystique$ 7995 SCEPTOR MODELS 1934 Comanche Street Oceanside California 92056 619-726-4971 box perfectly square fore aft well top bottom preferred method finishing rear section fuselage leave building board jack up tail post centerline exactly one-half fuselage width Using plan top view cut cross braces pairs install An alternate conventional technique position box wing saddle top view pull tail section gether over plan Regardless method used ensure fuselage straight along centerline Planking hatch area over fuel tank best accomplished stringy sheet balsa soaked ammonia water Using thick Hot Stuff attach sheet base curl up over bulkheads bead CyA opposite side installed same manner making joint top slicing through both halves straight edge Several cuts may required nice seam window frames cut / ply thickness commonly used cover foam wings Using plan guide trace patterns carefully cut out glue fuselage frames provide hidden seam installing clear plastic windows inside will done later using RC 56 An extra filler piece basswood pine now epoxied top F-3 crosspiece wing-seat front pieces will reinforce bracket grab ber tank seated Lite Ply floor plumbing running through engine mount cutout Standard throttle control ca ble used bottom sheeting sanded side taper before its installed thick Hot Stuff Several narrow strips can used lieu single sheet fuselage finished ready covering round longerons pleas ing shape sand nose blocks final shape thickness cheek blocks will vary depending engine installation Notice 25 two-stroke installation shown has thicker ones course thicker cheek blocks greater nose weightand narrower mount will necessarily Finally epoxy front dowel cabin roof Wing-fuselage assembly Drill Y16-dia hole exact center hardwood cen ter section trailing edge Its fore/aft location trailing edge based center hole Du-Bro bracket mounted exact center F-3 Bolt wing onto fuselage Clamp 3A 6 ply grabber against face dihedral brace After pinning end piece heavy string center rearmost fuselage use string check wing tips precisely equi distant Adjust grabber accordingly youre completely satisfied alignment epoxy permanently place 32 Model Aviation crptnr NDRI FiFES WHATEVER YOUR ABILITY THE WINDRIFTER MAKES YOUR FLYING EASIER DELUXE QUALITY KIT DIE CUT RIBS ALL HARDWARE INCLUDED SPOILER KIT INCLUDED Wing Span 2 pecel998 99ng Asee903 sq ro Lifting Sottace1042 sq n Wing Loading638 oz/tt FIpng wegttt4000 AotOlFell5l cthoot ballast Up 4 lbs ballast nap added concept grabber unique Fly Baby 72 have used success fully 12 different designs thus farand have yet see fail wild spins beginner however advised con sider using old-fashioned rubberbands fastening wing Once wing-fuselage assembly com pleted build forward cabin roof Trac ing outlines plan cut two pieces %2 balsa noticing grain direc tion soaked ammonia water laminated using thick Hot Stuff molded fit leading edge wing contour Make sure doesnt stick wing Reinstall wing fuselage adjust roof piece perfect fit glue perma nently fuselage Covering preferred method cover smallest pieces first MonoKote works well Cover fin rudder stabilizer elevator separately cut slots hinges Cover entire fuselage cut out stabilizer slot fin mounting area Similarly cover over windows cut away material installing clear plastic later Slide stabilizer its slot epoxy place after assuring proper midline horizontal-plane alignment Slip fin its slots adjust vertical alignment epoxy place Hinge rudder eleva tor sliding molded hinges pre cut slots securing toothpick segments Hot Stuff color trim model accom plished spraying red Poly-U onto MonoKote covering lightly buffing No 400 steel wool Sig Stripe-Rite makes excellent masking tape since %2 A-in tape will flex around curves quite easily Seal edges against fuel seepage brushing clear Sig Skybrite spray misted can held 12 surface Try smooth thin coat gives semitransparent effect contrasting trim done StripeRite tape sealed clear Skybrite vi nyl numbers purchased office supply store nose area tank com partment fuel-proofed clear Sky brite before painting Radio installation control Ny-Rod stiffened along its length cross members made up scrap balsa connector servo end soldered clev adjustable clevis attached horn control surfaces servos installed pair hardwood beams glued Lite Ply Hot Stuff battery installed bay between F-I F-2 first bay hind firewall easily accessed model balanced quite well RC com ponents positioned drawn Flying preflight testing home away added pressure flying Continued page 146 TM FUEL WIZZARD THE WORLDS FASTEST AND MOST CONVENIENT FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE * DURABLE FOR LONG LIFE FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS SUGGESTED RETAIL $ 995 NOW JUST $ 750 EPRINT PLEASE ENTER MY ORDER FOR FUEL WIZZARDS AT $ 750 POSTAGE PAID ENCLOSE CHECK OR MONEY ORDER NAME STREET ADDRESS___________________ APT NO________ CITY________________________ STATEZIP_______ SEND TO ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 4 DEALER INQUIRIES INVITED October 1989 33 SEE YOUR DEALER OR ORDER DIRECT FROM TILTS AD PRECISION MODEL PRODUCTS uzZZ7Is# Made U S BARSTOCK ALUMINUM SPINNERS Pan No Size TT-150-B .. 1-1/2 TT-175-B . 1-3/4 TT-200-B 11-225-B .. 21/4 11-226-B .. 2-1/4 FAI . TT-250-B . 2-1/2 TT-251-B . 2-1/2 FAI .. TT-275-B 3/4 TT-276-8 .. 2-3/4 FAI .. 11-300-B 11-301-BPAl TT-325-B . 3-1/4 TT-350-B /2 TT-375-B .. 3-3/4 11-400-B 4 RetailApprox PriceWeight $1395058 02 149509502 159510002 169516002 189515002 189519002 209517002 229522002 249520002 269526002 289525002 369534002 499547002 599552002 699557002 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add 5300 Per Spinner PROP NUT ADAPTORS Part No Size TT-140-A . 1/4-28 TT-147-A 4-28/7mm . TT-610-A 10mm TT-710-A 10mm TT-516-A '5/16-24 TT-518-A .. 5/16-24/8mm IT-BiD-A x 10mm TT-825-A . 8x 125mm TT-375-A3/8-24 TT-125-A x 125mm Retail Approx Price Weight $495 061 02 49506102 49506302 49508202 495 602 49507602 495076oz 495 .. 075 02 595 117 02 595 02 3 Pieces Nut Washer anti Machined Bushing Add S350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 other 357th alumnus Chuck Yeager alive well TV again again think single-seat Dornier-335 Air Space Museum Washington DCpossibly same wife Helen beginning push 70 pretty hard both still ac tive licensed pilots have dabbling RC several years am enclosing picture freehand scratch-builts little 50 Saito powered 514-pounderreferred Round big 13-lb 8footer named Mr Big Its powered Zenoah 23 Both fly very well Harvey Mace Ft Bragg CA Safety/Preston Continued page 22 letter stated story apparently first sur faced 1967 So happen prefer assem bling models components arc welding rather gluing also weareontact lenses dont alarmed saw warning National Newsletter Its just true Have another safe Fly Baby/Mathews Continued page 33 site Test range free surface movement deflections per plans engine carbure tor needle settings engine-on radio op eration Finally important make sure model balances slightly ward center-of-gravity shown plans Add ballast needed Dont fly model tail-heavy everything checks out OK Fly Baby ready big try field head wind add little right rudder advance throttle youre air borne 12 ft adding up elevator youre taking off downwind Remember climb rate func tion engine speed elevator Dont horse airplane around heavy-handedly gentle caresses thats needed Take model up bit throttle down dead slow Still isnt sinking much Find little thermal shut engine off Now isnt something kind flying too sedate taste try some slow-speed touch-andbumps Hows easy Did ever prettier Whatever style flying youll find Old-Timer will oblige Versatile brisk smooth responsive Fly Baby will exactly what want See yourself isnt up date Old-Timer could ask dB Facts/Abbott Continued page 35 erates Quiet whisper 20 dB Conversation 65 dB Loud orchestra 80 dB Start danger 90 dB Amplified rock band 110 dB Threshold pain 130 dB Federal agencies have established recom mended standards safe noise exposure eight hours per day 90 dB two hours per day 100 dB less one-quarter hour per day 115 dB Lets reexamine AMA FAI cri teria Current AMA90 dB 9 ft Old FAIl00 dB meter Current FAI98 dB three meters order compare recommenda tions need convert single distancein case 9 ft Thats easy enough involves converting meters feet meter ft applying inverse square law discussed above results Current AMA90 dB 9 ft Old FAI912 dB 9 ft Current FAI988 dB 9 ft As can see new FAI regulation considerably less stringent old 146 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManse K&B FUELS K&B Glow PLUGS 9 Blends4 Choices Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co Electric Motors Rubber Tissue Cox Parts Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 Letters Editor Continued page 12 V
Edition: Model Aviation - 1989/10
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 146
NO OCR TEXT NO OCR TEXT delight Just thought enlarging design seems strengthen its inherent esthetics Little wonder Bowers plagia rized earlier design using same sur face outlines time came de velop entry FAA home-built mar ket outlines dimensions totally SAM legal model blown up com mercial blueprinter using photo enlarger requirements modern RC gear dic tated several structural changes Also developed unusual much simpler sys tem building symmetrical sectioned tail surfaces Two-stroke power adequate Fly Baby prototype has flown both Fox I9BB OS 25 FSR though model could also le gally powered 30 An OS 40 fourcycle engine proved delight 40 four-stroke still legal since SAM rules count 60% four-stroke displacement compared two-stroke Though Fly Baby has yet flown floats illustrated 1945 Model Airplane News article plan try ap proach Should 72-in version prove delightful flying off water air will very likely publish enlarged float plans later date floats model absolute doll Slow speed flight characteris tics outstandingitll almost fly back wards wind Thermaling ability ex cellent Fly Baby will ride very light lift ease Because its steep dihedral will turn tightly strong thermal no tendency spin out Fly Baby 72 also excels sport role has incredibly short takeoff roll good control model flies docilely please 35% power yet will climb like bandit firewall Landings slow controlled bad pilot looks good model does loops spins lovely stall turns making flying re laxed fun experience model good Pete Bowers Fly Baby can get better transla tion Larger easier track orig inal radio controlled greater versatility utility offering new easier con struction techniques updated model makes hard-to-beat choice Old-Timer flying Whether youre going all-out competition just plain old fun-flying rundont walkto workbench Construction As drawn Fly Baby about minimum weight strength youll using model exclusively sport flying consider strengthening substituting spruce wing spars fu selage longerons increased weight would however somewhat reduce mod els slow speed performance characteristics novice RC fliers tendency fly solid objects single dowel front double post rear cabin rubberbanding wing would advisable grabber system shown plans sufficiently strong under normal use damage cabin roof could oc cur wing tip strike anything solid recommend using thick-grade Hot Stuff cyanoacrylate CyA adhesive project Five-minute epoxy works best ply-to-balsa joints wood sizes standard stock Light weight C-grain sheet ideal Beware un 26 Model Aviation Based color trim scheme Bowers used original full-scale home-built Fly Baby RC model generates quite large head turning quotient dressed its bright yellowand-red transparent polyurethane covering covering technique discussed text Inc siaoiiizer seciion ouiit flat men yiiier sheets added sanded symmetri cal section tried-and-true method constructing truly warp-tree structure Also shown rudder control horn Left A wide range power 20 40 can used model minor modifications 19 engine shown proved ideal choice very smooth idle adequate power Right Close-up servo mounting arrangementAce Bantam ser vos tray Note dowel cabin front part wing attachment setup dowel slides grabber arrangement wing leading edge single nylon bolt through trailing edge screws Du-Bro fitting secure wing position Very simple strong WILWJ ~Yf E PETE OWER VIA DOC MA1ThEW& BALOA ~QBAL&A Ysz BJ1LR PLANKING 25 ENGI~ BRLA Y8 DIA MUSIC diR 3 WHLO . 4 LAMLWRTION 6K 4 B5U&A WIN& TIP CAP W/Y4XY8 PRUC PLC /X2 34 BALSA 3/x4 y QBRLA B1LA 8ItT x Y4 BL8A ThIS Fl eiB CONVEI NLCL 10 ELECTRIC RYJR ACE IThRNRTURPL 0LIVT CllN USEP RINDLY. MKE8 FO IiRPP NEIGORS _____ \ /. BELIEVE ira Left The fuselage rudder stabilizer covered painted prior assembly covering carefully cut away epoxy will applied final assembly photo tail section shows stabilizer ready positioned slot provided fu selage elevator rudder yet installed Right stabilizer place hinges attached elevator linkage hooked up elevator assembly installed stabilizer technique provides neat buried elevator horn minimum hassle graded bundles can lot wast age Hardware fittings standard hobby shop stock items / ply used window frames common stock ten used skinning foam wings cant beg scraps Pattern fliers club hobby shop doesnt carry order thin ply Sig Tail surfaces Since empennage structure involving out-of-the-ordinary construction methods well tackle first symmetrical tail surface sections em ployed original design must dupli cated model SAM legal plane will purely sport however can ignore SAM requirement case build surfaces /4 x A-in stock using conventional techniques Since believe building either flat surface jigs developed fol lowing method project Build flat work surface Trace outlines onto appropriately sized wood slipping car bon paper between plans wood point follow standard build ing techniques Pin down glue together -in sta bilizer elevator center sections Re move dry add 3/ x /16 strips both sides original ribs strips butt against 3/6-sq strips added top bottom hinge spars per plans Once pieces have glued place use sanding block create symmetrical air foil technique shown plan side view much easier shim ming outlines cutting out ribs Its also stronger lighter struc ture looks exactly same covered Wing As tail surfaces trace rib patterns balsa stock using carbon pa per Stack cut knife jigsaw carefully sand final shape Notching trailing edge rib interface adds strength Pin trailing edge over 28 Model Aviation Left Partially finished wing showing half-ribs leading edge rib outline drawings clarify laminated tips positioned slots create accurate tip assembly Half-ribs novel Old-Timer case re-create system Bowers used home built also allow smoother covering avoiding tendency sag Right Universal clamps clothespins being used hold three formers fuselage sides alignment before final cementing Use triangles squares flat surface ensures true fuselage Left Early stage wing construction Note laminated wing tip structure fits against spar ends accommodate upward taper wing Right photo shows simple foam board pattern used laminate wing tips author prefers laminating technique use bamboo dural wire Balsa basswood can used ease technique can used laminating applications NYLON MOTOR MOUNT TO SUrF3A6 PLYWOODI/B LITE PLYI/B LITE PLY MOTOR McKJNT FORCUT-OUT FORv SQ FOUR CYCLE ENGINE4 OZ SULLIVAN4SQ BALSA SS-4 FUEL TANKBALSA 3A6 PLYWOODOPTIONAL NOSE FOR/- LO CLIPSPLY FOUR CYCLE ENGINEI/B NYLONI/8LITE/1yLITE 1/4 3/4 3/IA PLYWOODBASSWOOD _______F- 4I F-2F-3LWe 3M BASSWOOD SASA ShEETI/B SIP MUSIC WIRE MOTOR MOUNT FOR ITU coness SelerminedVIEW FOR PLACEMENT OPTIONAL Engine ChoiceFODR CYCLE ENGINEIN ODNSTRUCTION FIREWALLLANDING GEAR DETAIL 1 40 FOUR CYCLE ENG 0 FOUR CYCLE 3/33 BALSA PLANKINGI/As 3/4 SASS RH T COWL PIECES 4 OZ TANKII SERVOS S LAYERS OF 3132 BALSA NOTE GRAIN SOAK IN SNBsIORIA 8 FORM TO UNDERSIDE OF WING-USE CYP B INSTALL DEFLECTIONS RUDOER S1OTAL NYLON MOTOR x - AELEVATOR L MOUNT 1/4 BALSA SHEET1/16 DIP MUSIC WIRE 0LS DIP MUSIC WIRE 0 FUSELAGE SIDE VIEWMODEL AVIATION 0015 CLEAR PLASTIC TRIM TO FITTHE ORIGINAL FLY BABY LT PETE BoWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS 0 2 3 4 5 5TRACING BY JOE DEMARCO WINDSHIELD PATTERNSHEET OF 2 RIGHTS RESERVED Full-Size Plans AvailableSee Page 196 plans position notches cut out jigsaw blade reversed visual reference Since x %-in balsa stock invariably seems warped its best laminate front wing spar spruce balsa Posi tion spruce top since bottom will flared tips wing tips laminated over foam board cardboard form Moisten balsa diluted ammonia water coat al iphatic resin such Sig Bond slowly pull sandwich end form other Use masking tape hold strips place set Youll find technique will result strong lightweight structure Once laminated wing tips dry pin slot cut trailing edge onto shaped spar faces Bevel bottom tip lamination fair trailing edge wing tips can also installed wing off board wary warping center section built integral part left wing panel Use center section rib pattern plan trim down three ribs before adding sheeting Use tilt jig plans establish dihedral angle right left wing panel base ribs sheeting will stalled after wing fitted fuse lage grabber also added later tilt jig used properly set center wing joint rib thats required block up wing tips carefully sand final dihedral angle Make sure three center section ribs absolutely vertical Join panel center section ep oxy along rib faces spar joints Clamp place until epoxy sets spring-type clothespins Repeat process other wing panel Using razor saw cut necessary slots ribs %2 ply dihedral brace wing joiner Epoxy place against back main spar Sand leading edge shape shown plan After final sanding check wing alignment set aside Fuselage Build side over other di rectly plans Use scraps masking tape glue joints prevent sticking Note longerons extend fire wall Dont cut off stubs glue curing cut out jig bulkheads F-2 F-3 Lite Ply prefer able bulkheads due its ease cut ting regular ply may substituted Lay bulkheads directly over plans glue CyA Trace off patterns firewall F-i bulkhead using carbon paper Cut notches fit precisely possible Pre bend landing gear wire drill strap screw holes dont install gear permanently time Separate two side units popping apart table knife Trim sand smooth Replace right side building surface weight down secure ly Trial fit four bulkhead units good joints place appropriate slots fuselage side Use carpenters square 900 triangle ensure perfect alignment youre satisfied glue place Place left side over bulkheads re peat alignment process glue side slots should now have 30 Model Aviation Len I ne two Vuselage sides built one-over-the-other barrier strips masking tape substituted classic waxed paper ladder formers landing gear installed notched assist alignment Right assembled fuselage graced beauty pe culiar stick-and-strip structures modern adhesives construction methods assemblies no longer difficult build i57j structure airplane completed point wing alignment simple piece string used assure proper alignment wing prior drilling hole trailing edge bolt Equal distance center fuselage tail same point wing tip will square wing fuselage Clamp securely drilling mounting hole model temporarily assembled its bare bones give idea its general arrange ment Notice antiflex brace pushrods position single wing bolt 4 LAMINATIONS OF I/l6 1/4 BALSA 3/32 BALSA SHEET C GRAIN 7 DIHEDRAL AT EACH WING TIP I/4BO BALSA LEADING EDGE PLAN LEFT SIDE 1/4 1/2 BALSA SPAR WITH I/4 I/B SPRUCE CAP Kr 1/4 BALSA TRAILING / EDGE STOCK WING RIB 3/32 BA5A SHEET CENTER SECT RIB WING TIP RIB 3/32 C-GRAIN RALSA HALF RIB 3/32 PLY DIHEDRAL 3/32 BALSA SHEET BRACE BLOCK SAND AFTER INSTAIING /4 BALSA SPAR BALSA GUSSET -77 3/32 BALSA RIBS B HALF RIBS SHIM UP 3/IN SHIM UP I/IN I/4 1/2 BALSA SPAR 3/32 PLY DIHED BRACE TILT JIG 7 1/4 50 BALSA LEASING EDGE 77 APW H B SPR E 1/4 BALSA SHEET 1/4 BALSA SHEET 1 TYPICALBALSA HINGE TOR MW JOINER1/4 3/B AND HORNBALSA 3/321/4 BALSA RIBS 3/22 BALSA HALF RIBS WING DIHEDRAL BREAK 3NP [KGRABBER -A PLANRIGHT SIDE 3/32 BALSA 1 - I/lB BALSA CENTER SECTION SHEETING TOP N BOTTOM 3/32 PLYWOOD —4 PIHEDRAL BRACE ~-BALSA GUSSETS --1/4 BASS OR PINE SHAPE TO MATCH T STOCK 7 DIHEDRAL AT EACH WING TIP 4 LAMINATIONS OF I/IN 1/4 BALSA-WING TIP I/4I BALSA TE STOCK 3/IN SO BALSA /4 BALSA SHEET UNSANDED 3/W3/B BALSA 7 3/32 3/IN BALSA FILLER3/32I/4 BASA SANDED FIN/RUDDER B STAB/ELEV CONSTRUCTION 3/IN PLYWOOD V4BALSA SHEET7 OUTLINE GRABBER NOTE SAM EGAL ENLARGEMENT OF 941 ROW- P F RECORD HOLSER I/4 3/B BALSA ENLARGED SO% AND CONVERTED TO N/C ENGINE 19 -25 TWO CYCLE ON 40 FOUR CYCLE SPAN 72 WING CHORD 10- AREA 700 50 IN SAM MIN WT 49 02 PROTOTYPE WT SI 02 POWER 31 CU IN 0345B MODEL AVIATION THE ORIGINAL FLY BABY Li PETE BOWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS TRACING BY OETEM~ ALL RIGHTS O SHEET 2 OF 2 Full-Size Plans AvailableSee Page 196 Kings Symbol Power Sceptor fly Sceptor youre King Hill Bushwacker Designed low power sport flyer Bushwacker flies well 15 20 size engine large wing area light wing loading make Bushwacker almost powered glider will surprise its performance Construction wood straight forward Due complexity recommend intermediate builderlflyer PRICESSuggested Retail Windrifter$ 7695 Bushwacker$ 7395 Mini Bird$ 5695 Stepp Two$ 4795 R V 4$10695 Folke WuIfe 190$10995 P-47 Master Scale$17495 Mystique$ 7995 SCEPTOR MODELS 1934 Comanche Street Oceanside California 92056 619-726-4971 box perfectly square fore aft well top bottom preferred method finishing rear section fuselage leave building board jack up tail post centerline exactly one-half fuselage width Using plan top view cut cross braces pairs install An alternate conventional technique position box wing saddle top view pull tail section gether over plan Regardless method used ensure fuselage straight along centerline Planking hatch area over fuel tank best accomplished stringy sheet balsa soaked ammonia water Using thick Hot Stuff attach sheet base curl up over bulkheads bead CyA opposite side installed same manner making joint top slicing through both halves straight edge Several cuts may required nice seam window frames cut / ply thickness commonly used cover foam wings Using plan guide trace patterns carefully cut out glue fuselage frames provide hidden seam installing clear plastic windows inside will done later using RC 56 An extra filler piece basswood pine now epoxied top F-3 crosspiece wing-seat front pieces will reinforce bracket grab ber tank seated Lite Ply floor plumbing running through engine mount cutout Standard throttle control ca ble used bottom sheeting sanded side taper before its installed thick Hot Stuff Several narrow strips can used lieu single sheet fuselage finished ready covering round longerons pleas ing shape sand nose blocks final shape thickness cheek blocks will vary depending engine installation Notice 25 two-stroke installation shown has thicker ones course thicker cheek blocks greater nose weightand narrower mount will necessarily Finally epoxy front dowel cabin roof Wing-fuselage assembly Drill Y16-dia hole exact center hardwood cen ter section trailing edge Its fore/aft location trailing edge based center hole Du-Bro bracket mounted exact center F-3 Bolt wing onto fuselage Clamp 3A 6 ply grabber against face dihedral brace After pinning end piece heavy string center rearmost fuselage use string check wing tips precisely equi distant Adjust grabber accordingly youre completely satisfied alignment epoxy permanently place 32 Model Aviation crptnr NDRI FiFES WHATEVER YOUR ABILITY THE WINDRIFTER MAKES YOUR FLYING EASIER DELUXE QUALITY KIT DIE CUT RIBS ALL HARDWARE INCLUDED SPOILER KIT INCLUDED Wing Span 2 pecel998 99ng Asee903 sq ro Lifting Sottace1042 sq n Wing Loading638 oz/tt FIpng wegttt4000 AotOlFell5l cthoot ballast Up 4 lbs ballast nap added concept grabber unique Fly Baby 72 have used success fully 12 different designs thus farand have yet see fail wild spins beginner however advised con sider using old-fashioned rubberbands fastening wing Once wing-fuselage assembly com pleted build forward cabin roof Trac ing outlines plan cut two pieces %2 balsa noticing grain direc tion soaked ammonia water laminated using thick Hot Stuff molded fit leading edge wing contour Make sure doesnt stick wing Reinstall wing fuselage adjust roof piece perfect fit glue perma nently fuselage Covering preferred method cover smallest pieces first MonoKote works well Cover fin rudder stabilizer elevator separately cut slots hinges Cover entire fuselage cut out stabilizer slot fin mounting area Similarly cover over windows cut away material installing clear plastic later Slide stabilizer its slot epoxy place after assuring proper midline horizontal-plane alignment Slip fin its slots adjust vertical alignment epoxy place Hinge rudder eleva tor sliding molded hinges pre cut slots securing toothpick segments Hot Stuff color trim model accom plished spraying red Poly-U onto MonoKote covering lightly buffing No 400 steel wool Sig Stripe-Rite makes excellent masking tape since %2 A-in tape will flex around curves quite easily Seal edges against fuel seepage brushing clear Sig Skybrite spray misted can held 12 surface Try smooth thin coat gives semitransparent effect contrasting trim done StripeRite tape sealed clear Skybrite vi nyl numbers purchased office supply store nose area tank com partment fuel-proofed clear Sky brite before painting Radio installation control Ny-Rod stiffened along its length cross members made up scrap balsa connector servo end soldered clev adjustable clevis attached horn control surfaces servos installed pair hardwood beams glued Lite Ply Hot Stuff battery installed bay between F-I F-2 first bay hind firewall easily accessed model balanced quite well RC com ponents positioned drawn Flying preflight testing home away added pressure flying Continued page 146 TM FUEL WIZZARD THE WORLDS FASTEST AND MOST CONVENIENT FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE * DURABLE FOR LONG LIFE FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS SUGGESTED RETAIL $ 995 NOW JUST $ 750 EPRINT PLEASE ENTER MY ORDER FOR FUEL WIZZARDS AT $ 750 POSTAGE PAID ENCLOSE CHECK OR MONEY ORDER NAME STREET ADDRESS___________________ APT NO________ CITY________________________ STATEZIP_______ SEND TO ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 4 DEALER INQUIRIES INVITED October 1989 33 SEE YOUR DEALER OR ORDER DIRECT FROM TILTS AD PRECISION MODEL PRODUCTS uzZZ7Is# Made U S BARSTOCK ALUMINUM SPINNERS Pan No Size TT-150-B .. 1-1/2 TT-175-B . 1-3/4 TT-200-B 11-225-B .. 21/4 11-226-B .. 2-1/4 FAI . TT-250-B . 2-1/2 TT-251-B . 2-1/2 FAI .. TT-275-B 3/4 TT-276-8 .. 2-3/4 FAI .. 11-300-B 11-301-BPAl TT-325-B . 3-1/4 TT-350-B /2 TT-375-B .. 3-3/4 11-400-B 4 RetailApprox PriceWeight $1395058 02 149509502 159510002 169516002 189515002 189519002 209517002 229522002 249520002 269526002 289525002 369534002 499547002 599552002 699557002 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add 5300 Per Spinner PROP NUT ADAPTORS Part No Size TT-140-A . 1/4-28 TT-147-A 4-28/7mm . TT-610-A 10mm TT-710-A 10mm TT-516-A '5/16-24 TT-518-A .. 5/16-24/8mm IT-BiD-A x 10mm TT-825-A . 8x 125mm TT-375-A3/8-24 TT-125-A x 125mm Retail Approx Price Weight $495 061 02 49506102 49506302 49508202 495 602 49507602 495076oz 495 .. 075 02 595 117 02 595 02 3 Pieces Nut Washer anti Machined Bushing Add S350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 other 357th alumnus Chuck Yeager alive well TV again again think single-seat Dornier-335 Air Space Museum Washington DCpossibly same wife Helen beginning push 70 pretty hard both still ac tive licensed pilots have dabbling RC several years am enclosing picture freehand scratch-builts little 50 Saito powered 514-pounderreferred Round big 13-lb 8footer named Mr Big Its powered Zenoah 23 Both fly very well Harvey Mace Ft Bragg CA Safety/Preston Continued page 22 letter stated story apparently first sur faced 1967 So happen prefer assem bling models components arc welding rather gluing also weareontact lenses dont alarmed saw warning National Newsletter Its just true Have another safe Fly Baby/Mathews Continued page 33 site Test range free surface movement deflections per plans engine carbure tor needle settings engine-on radio op eration Finally important make sure model balances slightly ward center-of-gravity shown plans Add ballast needed Dont fly model tail-heavy everything checks out OK Fly Baby ready big try field head wind add little right rudder advance throttle youre air borne 12 ft adding up elevator youre taking off downwind Remember climb rate func tion engine speed elevator Dont horse airplane around heavy-handedly gentle caresses thats needed Take model up bit throttle down dead slow Still isnt sinking much Find little thermal shut engine off Now isnt something kind flying too sedate taste try some slow-speed touch-andbumps Hows easy Did ever prettier Whatever style flying youll find Old-Timer will oblige Versatile brisk smooth responsive Fly Baby will exactly what want See yourself isnt up date Old-Timer could ask dB Facts/Abbott Continued page 35 erates Quiet whisper 20 dB Conversation 65 dB Loud orchestra 80 dB Start danger 90 dB Amplified rock band 110 dB Threshold pain 130 dB Federal agencies have established recom mended standards safe noise exposure eight hours per day 90 dB two hours per day 100 dB less one-quarter hour per day 115 dB Lets reexamine AMA FAI cri teria Current AMA90 dB 9 ft Old FAIl00 dB meter Current FAI98 dB three meters order compare recommenda tions need convert single distancein case 9 ft Thats easy enough involves converting meters feet meter ft applying inverse square law discussed above results Current AMA90 dB 9 ft Old FAI912 dB 9 ft Current FAI988 dB 9 ft As can see new FAI regulation considerably less stringent old 146 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManse K&B FUELS K&B Glow PLUGS 9 Blends4 Choices Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co Electric Motors Rubber Tissue Cox Parts Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 Letters Editor Continued page 12 V
Edition: Model Aviation - 1989/10
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 146
NO OCR TEXT NO OCR TEXT delight Just thought enlarging design seems strengthen its inherent esthetics Little wonder Bowers plagia rized earlier design using same sur face outlines time came de velop entry FAA home-built mar ket outlines dimensions totally SAM legal model blown up com mercial blueprinter using photo enlarger requirements modern RC gear dic tated several structural changes Also developed unusual much simpler sys tem building symmetrical sectioned tail surfaces Two-stroke power adequate Fly Baby prototype has flown both Fox I9BB OS 25 FSR though model could also le gally powered 30 An OS 40 fourcycle engine proved delight 40 four-stroke still legal since SAM rules count 60% four-stroke displacement compared two-stroke Though Fly Baby has yet flown floats illustrated 1945 Model Airplane News article plan try ap proach Should 72-in version prove delightful flying off water air will very likely publish enlarged float plans later date floats model absolute doll Slow speed flight characteris tics outstandingitll almost fly back wards wind Thermaling ability ex cellent Fly Baby will ride very light lift ease Because its steep dihedral will turn tightly strong thermal no tendency spin out Fly Baby 72 also excels sport role has incredibly short takeoff roll good control model flies docilely please 35% power yet will climb like bandit firewall Landings slow controlled bad pilot looks good model does loops spins lovely stall turns making flying re laxed fun experience model good Pete Bowers Fly Baby can get better transla tion Larger easier track orig inal radio controlled greater versatility utility offering new easier con struction techniques updated model makes hard-to-beat choice Old-Timer flying Whether youre going all-out competition just plain old fun-flying rundont walkto workbench Construction As drawn Fly Baby about minimum weight strength youll using model exclusively sport flying consider strengthening substituting spruce wing spars fu selage longerons increased weight would however somewhat reduce mod els slow speed performance characteristics novice RC fliers tendency fly solid objects single dowel front double post rear cabin rubberbanding wing would advisable grabber system shown plans sufficiently strong under normal use damage cabin roof could oc cur wing tip strike anything solid recommend using thick-grade Hot Stuff cyanoacrylate CyA adhesive project Five-minute epoxy works best ply-to-balsa joints wood sizes standard stock Light weight C-grain sheet ideal Beware un 26 Model Aviation Based color trim scheme Bowers used original full-scale home-built Fly Baby RC model generates quite large head turning quotient dressed its bright yellowand-red transparent polyurethane covering covering technique discussed text Inc siaoiiizer seciion ouiit flat men yiiier sheets added sanded symmetri cal section tried-and-true method constructing truly warp-tree structure Also shown rudder control horn Left A wide range power 20 40 can used model minor modifications 19 engine shown proved ideal choice very smooth idle adequate power Right Close-up servo mounting arrangementAce Bantam ser vos tray Note dowel cabin front part wing attachment setup dowel slides grabber arrangement wing leading edge single nylon bolt through trailing edge screws Du-Bro fitting secure wing position Very simple strong WILWJ ~Yf E PETE OWER VIA DOC MA1ThEW& BALOA ~QBAL&A Ysz BJ1LR PLANKING 25 ENGI~ BRLA Y8 DIA MUSIC diR 3 WHLO . 4 LAMLWRTION 6K 4 B5U&A WIN& TIP CAP W/Y4XY8 PRUC PLC /X2 34 BALSA 3/x4 y QBRLA B1LA 8ItT x Y4 BL8A ThIS Fl eiB CONVEI NLCL 10 ELECTRIC RYJR ACE IThRNRTURPL 0LIVT CllN USEP RINDLY. MKE8 FO IiRPP NEIGORS _____ \ /. BELIEVE ira Left The fuselage rudder stabilizer covered painted prior assembly covering carefully cut away epoxy will applied final assembly photo tail section shows stabilizer ready positioned slot provided fu selage elevator rudder yet installed Right stabilizer place hinges attached elevator linkage hooked up elevator assembly installed stabilizer technique provides neat buried elevator horn minimum hassle graded bundles can lot wast age Hardware fittings standard hobby shop stock items / ply used window frames common stock ten used skinning foam wings cant beg scraps Pattern fliers club hobby shop doesnt carry order thin ply Sig Tail surfaces Since empennage structure involving out-of-the-ordinary construction methods well tackle first symmetrical tail surface sections em ployed original design must dupli cated model SAM legal plane will purely sport however can ignore SAM requirement case build surfaces /4 x A-in stock using conventional techniques Since believe building either flat surface jigs developed fol lowing method project Build flat work surface Trace outlines onto appropriately sized wood slipping car bon paper between plans wood point follow standard build ing techniques Pin down glue together -in sta bilizer elevator center sections Re move dry add 3/ x /16 strips both sides original ribs strips butt against 3/6-sq strips added top bottom hinge spars per plans Once pieces have glued place use sanding block create symmetrical air foil technique shown plan side view much easier shim ming outlines cutting out ribs Its also stronger lighter struc ture looks exactly same covered Wing As tail surfaces trace rib patterns balsa stock using carbon pa per Stack cut knife jigsaw carefully sand final shape Notching trailing edge rib interface adds strength Pin trailing edge over 28 Model Aviation Left Partially finished wing showing half-ribs leading edge rib outline drawings clarify laminated tips positioned slots create accurate tip assembly Half-ribs novel Old-Timer case re-create system Bowers used home built also allow smoother covering avoiding tendency sag Right Universal clamps clothespins being used hold three formers fuselage sides alignment before final cementing Use triangles squares flat surface ensures true fuselage Left Early stage wing construction Note laminated wing tip structure fits against spar ends accommodate upward taper wing Right photo shows simple foam board pattern used laminate wing tips author prefers laminating technique use bamboo dural wire Balsa basswood can used ease technique can used laminating applications NYLON MOTOR MOUNT TO SUrF3A6 PLYWOODI/B LITE PLYI/B LITE PLY MOTOR McKJNT FORCUT-OUT FORv SQ FOUR CYCLE ENGINE4 OZ SULLIVAN4SQ BALSA SS-4 FUEL TANKBALSA 3A6 PLYWOODOPTIONAL NOSE FOR/- LO CLIPSPLY FOUR CYCLE ENGINEI/B NYLONI/8LITE/1yLITE 1/4 3/4 3/IA PLYWOODBASSWOOD _______F- 4I F-2F-3LWe 3M BASSWOOD SASA ShEETI/B SIP MUSIC WIRE MOTOR MOUNT FOR ITU coness SelerminedVIEW FOR PLACEMENT OPTIONAL Engine ChoiceFODR CYCLE ENGINEIN ODNSTRUCTION FIREWALLLANDING GEAR DETAIL 1 40 FOUR CYCLE ENG 0 FOUR CYCLE 3/33 BALSA PLANKINGI/As 3/4 SASS RH T COWL PIECES 4 OZ TANKII SERVOS S LAYERS OF 3132 BALSA NOTE GRAIN SOAK IN SNBsIORIA 8 FORM TO UNDERSIDE OF WING-USE CYP B INSTALL DEFLECTIONS RUDOER S1OTAL NYLON MOTOR x - AELEVATOR L MOUNT 1/4 BALSA SHEET1/16 DIP MUSIC WIRE 0LS DIP MUSIC WIRE 0 FUSELAGE SIDE VIEWMODEL AVIATION 0015 CLEAR PLASTIC TRIM TO FITTHE ORIGINAL FLY BABY LT PETE BoWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS 0 2 3 4 5 5TRACING BY JOE DEMARCO WINDSHIELD PATTERNSHEET OF 2 RIGHTS RESERVED Full-Size Plans AvailableSee Page 196 plans position notches cut out jigsaw blade reversed visual reference Since x %-in balsa stock invariably seems warped its best laminate front wing spar spruce balsa Posi tion spruce top since bottom will flared tips wing tips laminated over foam board cardboard form Moisten balsa diluted ammonia water coat al iphatic resin such Sig Bond slowly pull sandwich end form other Use masking tape hold strips place set Youll find technique will result strong lightweight structure Once laminated wing tips dry pin slot cut trailing edge onto shaped spar faces Bevel bottom tip lamination fair trailing edge wing tips can also installed wing off board wary warping center section built integral part left wing panel Use center section rib pattern plan trim down three ribs before adding sheeting Use tilt jig plans establish dihedral angle right left wing panel base ribs sheeting will stalled after wing fitted fuse lage grabber also added later tilt jig used properly set center wing joint rib thats required block up wing tips carefully sand final dihedral angle Make sure three center section ribs absolutely vertical Join panel center section ep oxy along rib faces spar joints Clamp place until epoxy sets spring-type clothespins Repeat process other wing panel Using razor saw cut necessary slots ribs %2 ply dihedral brace wing joiner Epoxy place against back main spar Sand leading edge shape shown plan After final sanding check wing alignment set aside Fuselage Build side over other di rectly plans Use scraps masking tape glue joints prevent sticking Note longerons extend fire wall Dont cut off stubs glue curing cut out jig bulkheads F-2 F-3 Lite Ply prefer able bulkheads due its ease cut ting regular ply may substituted Lay bulkheads directly over plans glue CyA Trace off patterns firewall F-i bulkhead using carbon paper Cut notches fit precisely possible Pre bend landing gear wire drill strap screw holes dont install gear permanently time Separate two side units popping apart table knife Trim sand smooth Replace right side building surface weight down secure ly Trial fit four bulkhead units good joints place appropriate slots fuselage side Use carpenters square 900 triangle ensure perfect alignment youre satisfied glue place Place left side over bulkheads re peat alignment process glue side slots should now have 30 Model Aviation Len I ne two Vuselage sides built one-over-the-other barrier strips masking tape substituted classic waxed paper ladder formers landing gear installed notched assist alignment Right assembled fuselage graced beauty pe culiar stick-and-strip structures modern adhesives construction methods assemblies no longer difficult build i57j structure airplane completed point wing alignment simple piece string used assure proper alignment wing prior drilling hole trailing edge bolt Equal distance center fuselage tail same point wing tip will square wing fuselage Clamp securely drilling mounting hole model temporarily assembled its bare bones give idea its general arrange ment Notice antiflex brace pushrods position single wing bolt 4 LAMINATIONS OF I/l6 1/4 BALSA 3/32 BALSA SHEET C GRAIN 7 DIHEDRAL AT EACH WING TIP I/4BO BALSA LEADING EDGE PLAN LEFT SIDE 1/4 1/2 BALSA SPAR WITH I/4 I/B SPRUCE CAP Kr 1/4 BALSA TRAILING / EDGE STOCK WING RIB 3/32 BA5A SHEET CENTER SECT RIB WING TIP RIB 3/32 C-GRAIN RALSA HALF RIB 3/32 PLY DIHEDRAL 3/32 BALSA SHEET BRACE BLOCK SAND AFTER INSTAIING /4 BALSA SPAR BALSA GUSSET -77 3/32 BALSA RIBS B HALF RIBS SHIM UP 3/IN SHIM UP I/IN I/4 1/2 BALSA SPAR 3/32 PLY DIHED BRACE TILT JIG 7 1/4 50 BALSA LEASING EDGE 77 APW H B SPR E 1/4 BALSA SHEET 1/4 BALSA SHEET 1 TYPICALBALSA HINGE TOR MW JOINER1/4 3/B AND HORNBALSA 3/321/4 BALSA RIBS 3/22 BALSA HALF RIBS WING DIHEDRAL BREAK 3NP [KGRABBER -A PLANRIGHT SIDE 3/32 BALSA 1 - I/lB BALSA CENTER SECTION SHEETING TOP N BOTTOM 3/32 PLYWOOD —4 PIHEDRAL BRACE ~-BALSA GUSSETS --1/4 BASS OR PINE SHAPE TO MATCH T STOCK 7 DIHEDRAL AT EACH WING TIP 4 LAMINATIONS OF I/IN 1/4 BALSA-WING TIP I/4I BALSA TE STOCK 3/IN SO BALSA /4 BALSA SHEET UNSANDED 3/W3/B BALSA 7 3/32 3/IN BALSA FILLER3/32I/4 BASA SANDED FIN/RUDDER B STAB/ELEV CONSTRUCTION 3/IN PLYWOOD V4BALSA SHEET7 OUTLINE GRABBER NOTE SAM EGAL ENLARGEMENT OF 941 ROW- P F RECORD HOLSER I/4 3/B BALSA ENLARGED SO% AND CONVERTED TO N/C ENGINE 19 -25 TWO CYCLE ON 40 FOUR CYCLE SPAN 72 WING CHORD 10- AREA 700 50 IN SAM MIN WT 49 02 PROTOTYPE WT SI 02 POWER 31 CU IN 0345B MODEL AVIATION THE ORIGINAL FLY BABY Li PETE BOWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS TRACING BY OETEM~ ALL RIGHTS O SHEET 2 OF 2 Full-Size Plans AvailableSee Page 196 Kings Symbol Power Sceptor fly Sceptor youre King Hill Bushwacker Designed low power sport flyer Bushwacker flies well 15 20 size engine large wing area light wing loading make Bushwacker almost powered glider will surprise its performance Construction wood straight forward Due complexity recommend intermediate builderlflyer PRICESSuggested Retail Windrifter$ 7695 Bushwacker$ 7395 Mini Bird$ 5695 Stepp Two$ 4795 R V 4$10695 Folke WuIfe 190$10995 P-47 Master Scale$17495 Mystique$ 7995 SCEPTOR MODELS 1934 Comanche Street Oceanside California 92056 619-726-4971 box perfectly square fore aft well top bottom preferred method finishing rear section fuselage leave building board jack up tail post centerline exactly one-half fuselage width Using plan top view cut cross braces pairs install An alternate conventional technique position box wing saddle top view pull tail section gether over plan Regardless method used ensure fuselage straight along centerline Planking hatch area over fuel tank best accomplished stringy sheet balsa soaked ammonia water Using thick Hot Stuff attach sheet base curl up over bulkheads bead CyA opposite side installed same manner making joint top slicing through both halves straight edge Several cuts may required nice seam window frames cut / ply thickness commonly used cover foam wings Using plan guide trace patterns carefully cut out glue fuselage frames provide hidden seam installing clear plastic windows inside will done later using RC 56 An extra filler piece basswood pine now epoxied top F-3 crosspiece wing-seat front pieces will reinforce bracket grab ber tank seated Lite Ply floor plumbing running through engine mount cutout Standard throttle control ca ble used bottom sheeting sanded side taper before its installed thick Hot Stuff Several narrow strips can used lieu single sheet fuselage finished ready covering round longerons pleas ing shape sand nose blocks final shape thickness cheek blocks will vary depending engine installation Notice 25 two-stroke installation shown has thicker ones course thicker cheek blocks greater nose weightand narrower mount will necessarily Finally epoxy front dowel cabin roof Wing-fuselage assembly Drill Y16-dia hole exact center hardwood cen ter section trailing edge Its fore/aft location trailing edge based center hole Du-Bro bracket mounted exact center F-3 Bolt wing onto fuselage Clamp 3A 6 ply grabber against face dihedral brace After pinning end piece heavy string center rearmost fuselage use string check wing tips precisely equi distant Adjust grabber accordingly youre completely satisfied alignment epoxy permanently place 32 Model Aviation crptnr NDRI FiFES WHATEVER YOUR ABILITY THE WINDRIFTER MAKES YOUR FLYING EASIER DELUXE QUALITY KIT DIE CUT RIBS ALL HARDWARE INCLUDED SPOILER KIT INCLUDED Wing Span 2 pecel998 99ng Asee903 sq ro Lifting Sottace1042 sq n Wing Loading638 oz/tt FIpng wegttt4000 AotOlFell5l cthoot ballast Up 4 lbs ballast nap added concept grabber unique Fly Baby 72 have used success fully 12 different designs thus farand have yet see fail wild spins beginner however advised con sider using old-fashioned rubberbands fastening wing Once wing-fuselage assembly com pleted build forward cabin roof Trac ing outlines plan cut two pieces %2 balsa noticing grain direc tion soaked ammonia water laminated using thick Hot Stuff molded fit leading edge wing contour Make sure doesnt stick wing Reinstall wing fuselage adjust roof piece perfect fit glue perma nently fuselage Covering preferred method cover smallest pieces first MonoKote works well Cover fin rudder stabilizer elevator separately cut slots hinges Cover entire fuselage cut out stabilizer slot fin mounting area Similarly cover over windows cut away material installing clear plastic later Slide stabilizer its slot epoxy place after assuring proper midline horizontal-plane alignment Slip fin its slots adjust vertical alignment epoxy place Hinge rudder eleva tor sliding molded hinges pre cut slots securing toothpick segments Hot Stuff color trim model accom plished spraying red Poly-U onto MonoKote covering lightly buffing No 400 steel wool Sig Stripe-Rite makes excellent masking tape since %2 A-in tape will flex around curves quite easily Seal edges against fuel seepage brushing clear Sig Skybrite spray misted can held 12 surface Try smooth thin coat gives semitransparent effect contrasting trim done StripeRite tape sealed clear Skybrite vi nyl numbers purchased office supply store nose area tank com partment fuel-proofed clear Sky brite before painting Radio installation control Ny-Rod stiffened along its length cross members made up scrap balsa connector servo end soldered clev adjustable clevis attached horn control surfaces servos installed pair hardwood beams glued Lite Ply Hot Stuff battery installed bay between F-I F-2 first bay hind firewall easily accessed model balanced quite well RC com ponents positioned drawn Flying preflight testing home away added pressure flying Continued page 146 TM FUEL WIZZARD THE WORLDS FASTEST AND MOST CONVENIENT FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE * DURABLE FOR LONG LIFE FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS SUGGESTED RETAIL $ 995 NOW JUST $ 750 EPRINT PLEASE ENTER MY ORDER FOR FUEL WIZZARDS AT $ 750 POSTAGE PAID ENCLOSE CHECK OR MONEY ORDER NAME STREET ADDRESS___________________ APT NO________ CITY________________________ STATEZIP_______ SEND TO ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 4 DEALER INQUIRIES INVITED October 1989 33 SEE YOUR DEALER OR ORDER DIRECT FROM TILTS AD PRECISION MODEL PRODUCTS uzZZ7Is# Made U S BARSTOCK ALUMINUM SPINNERS Pan No Size TT-150-B .. 1-1/2 TT-175-B . 1-3/4 TT-200-B 11-225-B .. 21/4 11-226-B .. 2-1/4 FAI . TT-250-B . 2-1/2 TT-251-B . 2-1/2 FAI .. TT-275-B 3/4 TT-276-8 .. 2-3/4 FAI .. 11-300-B 11-301-BPAl TT-325-B . 3-1/4 TT-350-B /2 TT-375-B .. 3-3/4 11-400-B 4 RetailApprox PriceWeight $1395058 02 149509502 159510002 169516002 189515002 189519002 209517002 229522002 249520002 269526002 289525002 369534002 499547002 599552002 699557002 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add 5300 Per Spinner PROP NUT ADAPTORS Part No Size TT-140-A . 1/4-28 TT-147-A 4-28/7mm . TT-610-A 10mm TT-710-A 10mm TT-516-A '5/16-24 TT-518-A .. 5/16-24/8mm IT-BiD-A x 10mm TT-825-A . 8x 125mm TT-375-A3/8-24 TT-125-A x 125mm Retail Approx Price Weight $495 061 02 49506102 49506302 49508202 495 602 49507602 495076oz 495 .. 075 02 595 117 02 595 02 3 Pieces Nut Washer anti Machined Bushing Add S350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 other 357th alumnus Chuck Yeager alive well TV again again think single-seat Dornier-335 Air Space Museum Washington DCpossibly same wife Helen beginning push 70 pretty hard both still ac tive licensed pilots have dabbling RC several years am enclosing picture freehand scratch-builts little 50 Saito powered 514-pounderreferred Round big 13-lb 8footer named Mr Big Its powered Zenoah 23 Both fly very well Harvey Mace Ft Bragg CA Safety/Preston Continued page 22 letter stated story apparently first sur faced 1967 So happen prefer assem bling models components arc welding rather gluing also weareontact lenses dont alarmed saw warning National Newsletter Its just true Have another safe Fly Baby/Mathews Continued page 33 site Test range free surface movement deflections per plans engine carbure tor needle settings engine-on radio op eration Finally important make sure model balances slightly ward center-of-gravity shown plans Add ballast needed Dont fly model tail-heavy everything checks out OK Fly Baby ready big try field head wind add little right rudder advance throttle youre air borne 12 ft adding up elevator youre taking off downwind Remember climb rate func tion engine speed elevator Dont horse airplane around heavy-handedly gentle caresses thats needed Take model up bit throttle down dead slow Still isnt sinking much Find little thermal shut engine off Now isnt something kind flying too sedate taste try some slow-speed touch-andbumps Hows easy Did ever prettier Whatever style flying youll find Old-Timer will oblige Versatile brisk smooth responsive Fly Baby will exactly what want See yourself isnt up date Old-Timer could ask dB Facts/Abbott Continued page 35 erates Quiet whisper 20 dB Conversation 65 dB Loud orchestra 80 dB Start danger 90 dB Amplified rock band 110 dB Threshold pain 130 dB Federal agencies have established recom mended standards safe noise exposure eight hours per day 90 dB two hours per day 100 dB less one-quarter hour per day 115 dB Lets reexamine AMA FAI cri teria Current AMA90 dB 9 ft Old FAIl00 dB meter Current FAI98 dB three meters order compare recommenda tions need convert single distancein case 9 ft Thats easy enough involves converting meters feet meter ft applying inverse square law discussed above results Current AMA90 dB 9 ft Old FAI912 dB 9 ft Current FAI988 dB 9 ft As can see new FAI regulation considerably less stringent old 146 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManse K&B FUELS K&B Glow PLUGS 9 Blends4 Choices Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co Electric Motors Rubber Tissue Cox Parts Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 Letters Editor Continued page 12 V
Edition: Model Aviation - 1989/10
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 146
NO OCR TEXT NO OCR TEXT delight Just thought enlarging design seems strengthen its inherent esthetics Little wonder Bowers plagia rized earlier design using same sur face outlines time came de velop entry FAA home-built mar ket outlines dimensions totally SAM legal model blown up com mercial blueprinter using photo enlarger requirements modern RC gear dic tated several structural changes Also developed unusual much simpler sys tem building symmetrical sectioned tail surfaces Two-stroke power adequate Fly Baby prototype has flown both Fox I9BB OS 25 FSR though model could also le gally powered 30 An OS 40 fourcycle engine proved delight 40 four-stroke still legal since SAM rules count 60% four-stroke displacement compared two-stroke Though Fly Baby has yet flown floats illustrated 1945 Model Airplane News article plan try ap proach Should 72-in version prove delightful flying off water air will very likely publish enlarged float plans later date floats model absolute doll Slow speed flight characteris tics outstandingitll almost fly back wards wind Thermaling ability ex cellent Fly Baby will ride very light lift ease Because its steep dihedral will turn tightly strong thermal no tendency spin out Fly Baby 72 also excels sport role has incredibly short takeoff roll good control model flies docilely please 35% power yet will climb like bandit firewall Landings slow controlled bad pilot looks good model does loops spins lovely stall turns making flying re laxed fun experience model good Pete Bowers Fly Baby can get better transla tion Larger easier track orig inal radio controlled greater versatility utility offering new easier con struction techniques updated model makes hard-to-beat choice Old-Timer flying Whether youre going all-out competition just plain old fun-flying rundont walkto workbench Construction As drawn Fly Baby about minimum weight strength youll using model exclusively sport flying consider strengthening substituting spruce wing spars fu selage longerons increased weight would however somewhat reduce mod els slow speed performance characteristics novice RC fliers tendency fly solid objects single dowel front double post rear cabin rubberbanding wing would advisable grabber system shown plans sufficiently strong under normal use damage cabin roof could oc cur wing tip strike anything solid recommend using thick-grade Hot Stuff cyanoacrylate CyA adhesive project Five-minute epoxy works best ply-to-balsa joints wood sizes standard stock Light weight C-grain sheet ideal Beware un 26 Model Aviation Based color trim scheme Bowers used original full-scale home-built Fly Baby RC model generates quite large head turning quotient dressed its bright yellowand-red transparent polyurethane covering covering technique discussed text Inc siaoiiizer seciion ouiit flat men yiiier sheets added sanded symmetri cal section tried-and-true method constructing truly warp-tree structure Also shown rudder control horn Left A wide range power 20 40 can used model minor modifications 19 engine shown proved ideal choice very smooth idle adequate power Right Close-up servo mounting arrangementAce Bantam ser vos tray Note dowel cabin front part wing attachment setup dowel slides grabber arrangement wing leading edge single nylon bolt through trailing edge screws Du-Bro fitting secure wing position Very simple strong WILWJ ~Yf E PETE OWER VIA DOC MA1ThEW& BALOA ~QBAL&A Ysz BJ1LR PLANKING 25 ENGI~ BRLA Y8 DIA MUSIC diR 3 WHLO . 4 LAMLWRTION 6K 4 B5U&A WIN& TIP CAP W/Y4XY8 PRUC PLC /X2 34 BALSA 3/x4 y QBRLA B1LA 8ItT x Y4 BL8A ThIS Fl eiB CONVEI NLCL 10 ELECTRIC RYJR ACE IThRNRTURPL 0LIVT CllN USEP RINDLY. MKE8 FO IiRPP NEIGORS _____ \ /. BELIEVE ira Left The fuselage rudder stabilizer covered painted prior assembly covering carefully cut away epoxy will applied final assembly photo tail section shows stabilizer ready positioned slot provided fu selage elevator rudder yet installed Right stabilizer place hinges attached elevator linkage hooked up elevator assembly installed stabilizer technique provides neat buried elevator horn minimum hassle graded bundles can lot wast age Hardware fittings standard hobby shop stock items / ply used window frames common stock ten used skinning foam wings cant beg scraps Pattern fliers club hobby shop doesnt carry order thin ply Sig Tail surfaces Since empennage structure involving out-of-the-ordinary construction methods well tackle first symmetrical tail surface sections em ployed original design must dupli cated model SAM legal plane will purely sport however can ignore SAM requirement case build surfaces /4 x A-in stock using conventional techniques Since believe building either flat surface jigs developed fol lowing method project Build flat work surface Trace outlines onto appropriately sized wood slipping car bon paper between plans wood point follow standard build ing techniques Pin down glue together -in sta bilizer elevator center sections Re move dry add 3/ x /16 strips both sides original ribs strips butt against 3/6-sq strips added top bottom hinge spars per plans Once pieces have glued place use sanding block create symmetrical air foil technique shown plan side view much easier shim ming outlines cutting out ribs Its also stronger lighter struc ture looks exactly same covered Wing As tail surfaces trace rib patterns balsa stock using carbon pa per Stack cut knife jigsaw carefully sand final shape Notching trailing edge rib interface adds strength Pin trailing edge over 28 Model Aviation Left Partially finished wing showing half-ribs leading edge rib outline drawings clarify laminated tips positioned slots create accurate tip assembly Half-ribs novel Old-Timer case re-create system Bowers used home built also allow smoother covering avoiding tendency sag Right Universal clamps clothespins being used hold three formers fuselage sides alignment before final cementing Use triangles squares flat surface ensures true fuselage Left Early stage wing construction Note laminated wing tip structure fits against spar ends accommodate upward taper wing Right photo shows simple foam board pattern used laminate wing tips author prefers laminating technique use bamboo dural wire Balsa basswood can used ease technique can used laminating applications NYLON MOTOR MOUNT TO SUrF3A6 PLYWOODI/B LITE PLYI/B LITE PLY MOTOR McKJNT FORCUT-OUT FORv SQ FOUR CYCLE ENGINE4 OZ SULLIVAN4SQ BALSA SS-4 FUEL TANKBALSA 3A6 PLYWOODOPTIONAL NOSE FOR/- LO CLIPSPLY FOUR CYCLE ENGINEI/B NYLONI/8LITE/1yLITE 1/4 3/4 3/IA PLYWOODBASSWOOD _______F- 4I F-2F-3LWe 3M BASSWOOD SASA ShEETI/B SIP MUSIC WIRE MOTOR MOUNT FOR ITU coness SelerminedVIEW FOR PLACEMENT OPTIONAL Engine ChoiceFODR CYCLE ENGINEIN ODNSTRUCTION FIREWALLLANDING GEAR DETAIL 1 40 FOUR CYCLE ENG 0 FOUR CYCLE 3/33 BALSA PLANKINGI/As 3/4 SASS RH T COWL PIECES 4 OZ TANKII SERVOS S LAYERS OF 3132 BALSA NOTE GRAIN SOAK IN SNBsIORIA 8 FORM TO UNDERSIDE OF WING-USE CYP B INSTALL DEFLECTIONS RUDOER S1OTAL NYLON MOTOR x - AELEVATOR L MOUNT 1/4 BALSA SHEET1/16 DIP MUSIC WIRE 0LS DIP MUSIC WIRE 0 FUSELAGE SIDE VIEWMODEL AVIATION 0015 CLEAR PLASTIC TRIM TO FITTHE ORIGINAL FLY BABY LT PETE BoWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS 0 2 3 4 5 5TRACING BY JOE DEMARCO WINDSHIELD PATTERNSHEET OF 2 RIGHTS RESERVED Full-Size Plans AvailableSee Page 196 plans position notches cut out jigsaw blade reversed visual reference Since x %-in balsa stock invariably seems warped its best laminate front wing spar spruce balsa Posi tion spruce top since bottom will flared tips wing tips laminated over foam board cardboard form Moisten balsa diluted ammonia water coat al iphatic resin such Sig Bond slowly pull sandwich end form other Use masking tape hold strips place set Youll find technique will result strong lightweight structure Once laminated wing tips dry pin slot cut trailing edge onto shaped spar faces Bevel bottom tip lamination fair trailing edge wing tips can also installed wing off board wary warping center section built integral part left wing panel Use center section rib pattern plan trim down three ribs before adding sheeting Use tilt jig plans establish dihedral angle right left wing panel base ribs sheeting will stalled after wing fitted fuse lage grabber also added later tilt jig used properly set center wing joint rib thats required block up wing tips carefully sand final dihedral angle Make sure three center section ribs absolutely vertical Join panel center section ep oxy along rib faces spar joints Clamp place until epoxy sets spring-type clothespins Repeat process other wing panel Using razor saw cut necessary slots ribs %2 ply dihedral brace wing joiner Epoxy place against back main spar Sand leading edge shape shown plan After final sanding check wing alignment set aside Fuselage Build side over other di rectly plans Use scraps masking tape glue joints prevent sticking Note longerons extend fire wall Dont cut off stubs glue curing cut out jig bulkheads F-2 F-3 Lite Ply prefer able bulkheads due its ease cut ting regular ply may substituted Lay bulkheads directly over plans glue CyA Trace off patterns firewall F-i bulkhead using carbon paper Cut notches fit precisely possible Pre bend landing gear wire drill strap screw holes dont install gear permanently time Separate two side units popping apart table knife Trim sand smooth Replace right side building surface weight down secure ly Trial fit four bulkhead units good joints place appropriate slots fuselage side Use carpenters square 900 triangle ensure perfect alignment youre satisfied glue place Place left side over bulkheads re peat alignment process glue side slots should now have 30 Model Aviation Len I ne two Vuselage sides built one-over-the-other barrier strips masking tape substituted classic waxed paper ladder formers landing gear installed notched assist alignment Right assembled fuselage graced beauty pe culiar stick-and-strip structures modern adhesives construction methods assemblies no longer difficult build i57j structure airplane completed point wing alignment simple piece string used assure proper alignment wing prior drilling hole trailing edge bolt Equal distance center fuselage tail same point wing tip will square wing fuselage Clamp securely drilling mounting hole model temporarily assembled its bare bones give idea its general arrange ment Notice antiflex brace pushrods position single wing bolt 4 LAMINATIONS OF I/l6 1/4 BALSA 3/32 BALSA SHEET C GRAIN 7 DIHEDRAL AT EACH WING TIP I/4BO BALSA LEADING EDGE PLAN LEFT SIDE 1/4 1/2 BALSA SPAR WITH I/4 I/B SPRUCE CAP Kr 1/4 BALSA TRAILING / EDGE STOCK WING RIB 3/32 BA5A SHEET CENTER SECT RIB WING TIP RIB 3/32 C-GRAIN RALSA HALF RIB 3/32 PLY DIHEDRAL 3/32 BALSA SHEET BRACE BLOCK SAND AFTER INSTAIING /4 BALSA SPAR BALSA GUSSET -77 3/32 BALSA RIBS B HALF RIBS SHIM UP 3/IN SHIM UP I/IN I/4 1/2 BALSA SPAR 3/32 PLY DIHED BRACE TILT JIG 7 1/4 50 BALSA LEASING EDGE 77 APW H B SPR E 1/4 BALSA SHEET 1/4 BALSA SHEET 1 TYPICALBALSA HINGE TOR MW JOINER1/4 3/B AND HORNBALSA 3/321/4 BALSA RIBS 3/22 BALSA HALF RIBS WING DIHEDRAL BREAK 3NP [KGRABBER -A PLANRIGHT SIDE 3/32 BALSA 1 - I/lB BALSA CENTER SECTION SHEETING TOP N BOTTOM 3/32 PLYWOOD —4 PIHEDRAL BRACE ~-BALSA GUSSETS --1/4 BASS OR PINE SHAPE TO MATCH T STOCK 7 DIHEDRAL AT EACH WING TIP 4 LAMINATIONS OF I/IN 1/4 BALSA-WING TIP I/4I BALSA TE STOCK 3/IN SO BALSA /4 BALSA SHEET UNSANDED 3/W3/B BALSA 7 3/32 3/IN BALSA FILLER3/32I/4 BASA SANDED FIN/RUDDER B STAB/ELEV CONSTRUCTION 3/IN PLYWOOD V4BALSA SHEET7 OUTLINE GRABBER NOTE SAM EGAL ENLARGEMENT OF 941 ROW- P F RECORD HOLSER I/4 3/B BALSA ENLARGED SO% AND CONVERTED TO N/C ENGINE 19 -25 TWO CYCLE ON 40 FOUR CYCLE SPAN 72 WING CHORD 10- AREA 700 50 IN SAM MIN WT 49 02 PROTOTYPE WT SI 02 POWER 31 CU IN 0345B MODEL AVIATION THE ORIGINAL FLY BABY Li PETE BOWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS TRACING BY OETEM~ ALL RIGHTS O SHEET 2 OF 2 Full-Size Plans AvailableSee Page 196 Kings Symbol Power Sceptor fly Sceptor youre King Hill Bushwacker Designed low power sport flyer Bushwacker flies well 15 20 size engine large wing area light wing loading make Bushwacker almost powered glider will surprise its performance Construction wood straight forward Due complexity recommend intermediate builderlflyer PRICESSuggested Retail Windrifter$ 7695 Bushwacker$ 7395 Mini Bird$ 5695 Stepp Two$ 4795 R V 4$10695 Folke WuIfe 190$10995 P-47 Master Scale$17495 Mystique$ 7995 SCEPTOR MODELS 1934 Comanche Street Oceanside California 92056 619-726-4971 box perfectly square fore aft well top bottom preferred method finishing rear section fuselage leave building board jack up tail post centerline exactly one-half fuselage width Using plan top view cut cross braces pairs install An alternate conventional technique position box wing saddle top view pull tail section gether over plan Regardless method used ensure fuselage straight along centerline Planking hatch area over fuel tank best accomplished stringy sheet balsa soaked ammonia water Using thick Hot Stuff attach sheet base curl up over bulkheads bead CyA opposite side installed same manner making joint top slicing through both halves straight edge Several cuts may required nice seam window frames cut / ply thickness commonly used cover foam wings Using plan guide trace patterns carefully cut out glue fuselage frames provide hidden seam installing clear plastic windows inside will done later using RC 56 An extra filler piece basswood pine now epoxied top F-3 crosspiece wing-seat front pieces will reinforce bracket grab ber tank seated Lite Ply floor plumbing running through engine mount cutout Standard throttle control ca ble used bottom sheeting sanded side taper before its installed thick Hot Stuff Several narrow strips can used lieu single sheet fuselage finished ready covering round longerons pleas ing shape sand nose blocks final shape thickness cheek blocks will vary depending engine installation Notice 25 two-stroke installation shown has thicker ones course thicker cheek blocks greater nose weightand narrower mount will necessarily Finally epoxy front dowel cabin roof Wing-fuselage assembly Drill Y16-dia hole exact center hardwood cen ter section trailing edge Its fore/aft location trailing edge based center hole Du-Bro bracket mounted exact center F-3 Bolt wing onto fuselage Clamp 3A 6 ply grabber against face dihedral brace After pinning end piece heavy string center rearmost fuselage use string check wing tips precisely equi distant Adjust grabber accordingly youre completely satisfied alignment epoxy permanently place 32 Model Aviation crptnr NDRI FiFES WHATEVER YOUR ABILITY THE WINDRIFTER MAKES YOUR FLYING EASIER DELUXE QUALITY KIT DIE CUT RIBS ALL HARDWARE INCLUDED SPOILER KIT INCLUDED Wing Span 2 pecel998 99ng Asee903 sq ro Lifting Sottace1042 sq n Wing Loading638 oz/tt FIpng wegttt4000 AotOlFell5l cthoot ballast Up 4 lbs ballast nap added concept grabber unique Fly Baby 72 have used success fully 12 different designs thus farand have yet see fail wild spins beginner however advised con sider using old-fashioned rubberbands fastening wing Once wing-fuselage assembly com pleted build forward cabin roof Trac ing outlines plan cut two pieces %2 balsa noticing grain direc tion soaked ammonia water laminated using thick Hot Stuff molded fit leading edge wing contour Make sure doesnt stick wing Reinstall wing fuselage adjust roof piece perfect fit glue perma nently fuselage Covering preferred method cover smallest pieces first MonoKote works well Cover fin rudder stabilizer elevator separately cut slots hinges Cover entire fuselage cut out stabilizer slot fin mounting area Similarly cover over windows cut away material installing clear plastic later Slide stabilizer its slot epoxy place after assuring proper midline horizontal-plane alignment Slip fin its slots adjust vertical alignment epoxy place Hinge rudder eleva tor sliding molded hinges pre cut slots securing toothpick segments Hot Stuff color trim model accom plished spraying red Poly-U onto MonoKote covering lightly buffing No 400 steel wool Sig Stripe-Rite makes excellent masking tape since %2 A-in tape will flex around curves quite easily Seal edges against fuel seepage brushing clear Sig Skybrite spray misted can held 12 surface Try smooth thin coat gives semitransparent effect contrasting trim done StripeRite tape sealed clear Skybrite vi nyl numbers purchased office supply store nose area tank com partment fuel-proofed clear Sky brite before painting Radio installation control Ny-Rod stiffened along its length cross members made up scrap balsa connector servo end soldered clev adjustable clevis attached horn control surfaces servos installed pair hardwood beams glued Lite Ply Hot Stuff battery installed bay between F-I F-2 first bay hind firewall easily accessed model balanced quite well RC com ponents positioned drawn Flying preflight testing home away added pressure flying Continued page 146 TM FUEL WIZZARD THE WORLDS FASTEST AND MOST CONVENIENT FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE * DURABLE FOR LONG LIFE FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS SUGGESTED RETAIL $ 995 NOW JUST $ 750 EPRINT PLEASE ENTER MY ORDER FOR FUEL WIZZARDS AT $ 750 POSTAGE PAID ENCLOSE CHECK OR MONEY ORDER NAME STREET ADDRESS___________________ APT NO________ CITY________________________ STATEZIP_______ SEND TO ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 4 DEALER INQUIRIES INVITED October 1989 33 SEE YOUR DEALER OR ORDER DIRECT FROM TILTS AD PRECISION MODEL PRODUCTS uzZZ7Is# Made U S BARSTOCK ALUMINUM SPINNERS Pan No Size TT-150-B .. 1-1/2 TT-175-B . 1-3/4 TT-200-B 11-225-B .. 21/4 11-226-B .. 2-1/4 FAI . TT-250-B . 2-1/2 TT-251-B . 2-1/2 FAI .. TT-275-B 3/4 TT-276-8 .. 2-3/4 FAI .. 11-300-B 11-301-BPAl TT-325-B . 3-1/4 TT-350-B /2 TT-375-B .. 3-3/4 11-400-B 4 RetailApprox PriceWeight $1395058 02 149509502 159510002 169516002 189515002 189519002 209517002 229522002 249520002 269526002 289525002 369534002 499547002 599552002 699557002 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add 5300 Per Spinner PROP NUT ADAPTORS Part No Size TT-140-A . 1/4-28 TT-147-A 4-28/7mm . TT-610-A 10mm TT-710-A 10mm TT-516-A '5/16-24 TT-518-A .. 5/16-24/8mm IT-BiD-A x 10mm TT-825-A . 8x 125mm TT-375-A3/8-24 TT-125-A x 125mm Retail Approx Price Weight $495 061 02 49506102 49506302 49508202 495 602 49507602 495076oz 495 .. 075 02 595 117 02 595 02 3 Pieces Nut Washer anti Machined Bushing Add S350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 other 357th alumnus Chuck Yeager alive well TV again again think single-seat Dornier-335 Air Space Museum Washington DCpossibly same wife Helen beginning push 70 pretty hard both still ac tive licensed pilots have dabbling RC several years am enclosing picture freehand scratch-builts little 50 Saito powered 514-pounderreferred Round big 13-lb 8footer named Mr Big Its powered Zenoah 23 Both fly very well Harvey Mace Ft Bragg CA Safety/Preston Continued page 22 letter stated story apparently first sur faced 1967 So happen prefer assem bling models components arc welding rather gluing also weareontact lenses dont alarmed saw warning National Newsletter Its just true Have another safe Fly Baby/Mathews Continued page 33 site Test range free surface movement deflections per plans engine carbure tor needle settings engine-on radio op eration Finally important make sure model balances slightly ward center-of-gravity shown plans Add ballast needed Dont fly model tail-heavy everything checks out OK Fly Baby ready big try field head wind add little right rudder advance throttle youre air borne 12 ft adding up elevator youre taking off downwind Remember climb rate func tion engine speed elevator Dont horse airplane around heavy-handedly gentle caresses thats needed Take model up bit throttle down dead slow Still isnt sinking much Find little thermal shut engine off Now isnt something kind flying too sedate taste try some slow-speed touch-andbumps Hows easy Did ever prettier Whatever style flying youll find Old-Timer will oblige Versatile brisk smooth responsive Fly Baby will exactly what want See yourself isnt up date Old-Timer could ask dB Facts/Abbott Continued page 35 erates Quiet whisper 20 dB Conversation 65 dB Loud orchestra 80 dB Start danger 90 dB Amplified rock band 110 dB Threshold pain 130 dB Federal agencies have established recom mended standards safe noise exposure eight hours per day 90 dB two hours per day 100 dB less one-quarter hour per day 115 dB Lets reexamine AMA FAI cri teria Current AMA90 dB 9 ft Old FAIl00 dB meter Current FAI98 dB three meters order compare recommenda tions need convert single distancein case 9 ft Thats easy enough involves converting meters feet meter ft applying inverse square law discussed above results Current AMA90 dB 9 ft Old FAI912 dB 9 ft Current FAI988 dB 9 ft As can see new FAI regulation considerably less stringent old 146 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManse K&B FUELS K&B Glow PLUGS 9 Blends4 Choices Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co Electric Motors Rubber Tissue Cox Parts Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 Letters Editor Continued page 12 V
Edition: Model Aviation - 1989/10
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 146
NO OCR TEXT NO OCR TEXT delight Just thought enlarging design seems strengthen its inherent esthetics Little wonder Bowers plagia rized earlier design using same sur face outlines time came de velop entry FAA home-built mar ket outlines dimensions totally SAM legal model blown up com mercial blueprinter using photo enlarger requirements modern RC gear dic tated several structural changes Also developed unusual much simpler sys tem building symmetrical sectioned tail surfaces Two-stroke power adequate Fly Baby prototype has flown both Fox I9BB OS 25 FSR though model could also le gally powered 30 An OS 40 fourcycle engine proved delight 40 four-stroke still legal since SAM rules count 60% four-stroke displacement compared two-stroke Though Fly Baby has yet flown floats illustrated 1945 Model Airplane News article plan try ap proach Should 72-in version prove delightful flying off water air will very likely publish enlarged float plans later date floats model absolute doll Slow speed flight characteris tics outstandingitll almost fly back wards wind Thermaling ability ex cellent Fly Baby will ride very light lift ease Because its steep dihedral will turn tightly strong thermal no tendency spin out Fly Baby 72 also excels sport role has incredibly short takeoff roll good control model flies docilely please 35% power yet will climb like bandit firewall Landings slow controlled bad pilot looks good model does loops spins lovely stall turns making flying re laxed fun experience model good Pete Bowers Fly Baby can get better transla tion Larger easier track orig inal radio controlled greater versatility utility offering new easier con struction techniques updated model makes hard-to-beat choice Old-Timer flying Whether youre going all-out competition just plain old fun-flying rundont walkto workbench Construction As drawn Fly Baby about minimum weight strength youll using model exclusively sport flying consider strengthening substituting spruce wing spars fu selage longerons increased weight would however somewhat reduce mod els slow speed performance characteristics novice RC fliers tendency fly solid objects single dowel front double post rear cabin rubberbanding wing would advisable grabber system shown plans sufficiently strong under normal use damage cabin roof could oc cur wing tip strike anything solid recommend using thick-grade Hot Stuff cyanoacrylate CyA adhesive project Five-minute epoxy works best ply-to-balsa joints wood sizes standard stock Light weight C-grain sheet ideal Beware un 26 Model Aviation Based color trim scheme Bowers used original full-scale home-built Fly Baby RC model generates quite large head turning quotient dressed its bright yellowand-red transparent polyurethane covering covering technique discussed text Inc siaoiiizer seciion ouiit flat men yiiier sheets added sanded symmetri cal section tried-and-true method constructing truly warp-tree structure Also shown rudder control horn Left A wide range power 20 40 can used model minor modifications 19 engine shown proved ideal choice very smooth idle adequate power Right Close-up servo mounting arrangementAce Bantam ser vos tray Note dowel cabin front part wing attachment setup dowel slides grabber arrangement wing leading edge single nylon bolt through trailing edge screws Du-Bro fitting secure wing position Very simple strong WILWJ ~Yf E PETE OWER VIA DOC MA1ThEW& BALOA ~QBAL&A Ysz BJ1LR PLANKING 25 ENGI~ BRLA Y8 DIA MUSIC diR 3 WHLO . 4 LAMLWRTION 6K 4 B5U&A WIN& TIP CAP W/Y4XY8 PRUC PLC /X2 34 BALSA 3/x4 y QBRLA B1LA 8ItT x Y4 BL8A ThIS Fl eiB CONVEI NLCL 10 ELECTRIC RYJR ACE IThRNRTURPL 0LIVT CllN USEP RINDLY. MKE8 FO IiRPP NEIGORS _____ \ /. BELIEVE ira Left The fuselage rudder stabilizer covered painted prior assembly covering carefully cut away epoxy will applied final assembly photo tail section shows stabilizer ready positioned slot provided fu selage elevator rudder yet installed Right stabilizer place hinges attached elevator linkage hooked up elevator assembly installed stabilizer technique provides neat buried elevator horn minimum hassle graded bundles can lot wast age Hardware fittings standard hobby shop stock items / ply used window frames common stock ten used skinning foam wings cant beg scraps Pattern fliers club hobby shop doesnt carry order thin ply Sig Tail surfaces Since empennage structure involving out-of-the-ordinary construction methods well tackle first symmetrical tail surface sections em ployed original design must dupli cated model SAM legal plane will purely sport however can ignore SAM requirement case build surfaces /4 x A-in stock using conventional techniques Since believe building either flat surface jigs developed fol lowing method project Build flat work surface Trace outlines onto appropriately sized wood slipping car bon paper between plans wood point follow standard build ing techniques Pin down glue together -in sta bilizer elevator center sections Re move dry add 3/ x /16 strips both sides original ribs strips butt against 3/6-sq strips added top bottom hinge spars per plans Once pieces have glued place use sanding block create symmetrical air foil technique shown plan side view much easier shim ming outlines cutting out ribs Its also stronger lighter struc ture looks exactly same covered Wing As tail surfaces trace rib patterns balsa stock using carbon pa per Stack cut knife jigsaw carefully sand final shape Notching trailing edge rib interface adds strength Pin trailing edge over 28 Model Aviation Left Partially finished wing showing half-ribs leading edge rib outline drawings clarify laminated tips positioned slots create accurate tip assembly Half-ribs novel Old-Timer case re-create system Bowers used home built also allow smoother covering avoiding tendency sag Right Universal clamps clothespins being used hold three formers fuselage sides alignment before final cementing Use triangles squares flat surface ensures true fuselage Left Early stage wing construction Note laminated wing tip structure fits against spar ends accommodate upward taper wing Right photo shows simple foam board pattern used laminate wing tips author prefers laminating technique use bamboo dural wire Balsa basswood can used ease technique can used laminating applications NYLON MOTOR MOUNT TO SUrF3A6 PLYWOODI/B LITE PLYI/B LITE PLY MOTOR McKJNT FORCUT-OUT FORv SQ FOUR CYCLE ENGINE4 OZ SULLIVAN4SQ BALSA SS-4 FUEL TANKBALSA 3A6 PLYWOODOPTIONAL NOSE FOR/- LO CLIPSPLY FOUR CYCLE ENGINEI/B NYLONI/8LITE/1yLITE 1/4 3/4 3/IA PLYWOODBASSWOOD _______F- 4I F-2F-3LWe 3M BASSWOOD SASA ShEETI/B SIP MUSIC WIRE MOTOR MOUNT FOR ITU coness SelerminedVIEW FOR PLACEMENT OPTIONAL Engine ChoiceFODR CYCLE ENGINEIN ODNSTRUCTION FIREWALLLANDING GEAR DETAIL 1 40 FOUR CYCLE ENG 0 FOUR CYCLE 3/33 BALSA PLANKINGI/As 3/4 SASS RH T COWL PIECES 4 OZ TANKII SERVOS S LAYERS OF 3132 BALSA NOTE GRAIN SOAK IN SNBsIORIA 8 FORM TO UNDERSIDE OF WING-USE CYP B INSTALL DEFLECTIONS RUDOER S1OTAL NYLON MOTOR x - AELEVATOR L MOUNT 1/4 BALSA SHEET1/16 DIP MUSIC WIRE 0LS DIP MUSIC WIRE 0 FUSELAGE SIDE VIEWMODEL AVIATION 0015 CLEAR PLASTIC TRIM TO FITTHE ORIGINAL FLY BABY LT PETE BoWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS 0 2 3 4 5 5TRACING BY JOE DEMARCO WINDSHIELD PATTERNSHEET OF 2 RIGHTS RESERVED Full-Size Plans AvailableSee Page 196 plans position notches cut out jigsaw blade reversed visual reference Since x %-in balsa stock invariably seems warped its best laminate front wing spar spruce balsa Posi tion spruce top since bottom will flared tips wing tips laminated over foam board cardboard form Moisten balsa diluted ammonia water coat al iphatic resin such Sig Bond slowly pull sandwich end form other Use masking tape hold strips place set Youll find technique will result strong lightweight structure Once laminated wing tips dry pin slot cut trailing edge onto shaped spar faces Bevel bottom tip lamination fair trailing edge wing tips can also installed wing off board wary warping center section built integral part left wing panel Use center section rib pattern plan trim down three ribs before adding sheeting Use tilt jig plans establish dihedral angle right left wing panel base ribs sheeting will stalled after wing fitted fuse lage grabber also added later tilt jig used properly set center wing joint rib thats required block up wing tips carefully sand final dihedral angle Make sure three center section ribs absolutely vertical Join panel center section ep oxy along rib faces spar joints Clamp place until epoxy sets spring-type clothespins Repeat process other wing panel Using razor saw cut necessary slots ribs %2 ply dihedral brace wing joiner Epoxy place against back main spar Sand leading edge shape shown plan After final sanding check wing alignment set aside Fuselage Build side over other di rectly plans Use scraps masking tape glue joints prevent sticking Note longerons extend fire wall Dont cut off stubs glue curing cut out jig bulkheads F-2 F-3 Lite Ply prefer able bulkheads due its ease cut ting regular ply may substituted Lay bulkheads directly over plans glue CyA Trace off patterns firewall F-i bulkhead using carbon paper Cut notches fit precisely possible Pre bend landing gear wire drill strap screw holes dont install gear permanently time Separate two side units popping apart table knife Trim sand smooth Replace right side building surface weight down secure ly Trial fit four bulkhead units good joints place appropriate slots fuselage side Use carpenters square 900 triangle ensure perfect alignment youre satisfied glue place Place left side over bulkheads re peat alignment process glue side slots should now have 30 Model Aviation Len I ne two Vuselage sides built one-over-the-other barrier strips masking tape substituted classic waxed paper ladder formers landing gear installed notched assist alignment Right assembled fuselage graced beauty pe culiar stick-and-strip structures modern adhesives construction methods assemblies no longer difficult build i57j structure airplane completed point wing alignment simple piece string used assure proper alignment wing prior drilling hole trailing edge bolt Equal distance center fuselage tail same point wing tip will square wing fuselage Clamp securely drilling mounting hole model temporarily assembled its bare bones give idea its general arrange ment Notice antiflex brace pushrods position single wing bolt 4 LAMINATIONS OF I/l6 1/4 BALSA 3/32 BALSA SHEET C GRAIN 7 DIHEDRAL AT EACH WING TIP I/4BO BALSA LEADING EDGE PLAN LEFT SIDE 1/4 1/2 BALSA SPAR WITH I/4 I/B SPRUCE CAP Kr 1/4 BALSA TRAILING / EDGE STOCK WING RIB 3/32 BA5A SHEET CENTER SECT RIB WING TIP RIB 3/32 C-GRAIN RALSA HALF RIB 3/32 PLY DIHEDRAL 3/32 BALSA SHEET BRACE BLOCK SAND AFTER INSTAIING /4 BALSA SPAR BALSA GUSSET -77 3/32 BALSA RIBS B HALF RIBS SHIM UP 3/IN SHIM UP I/IN I/4 1/2 BALSA SPAR 3/32 PLY DIHED BRACE TILT JIG 7 1/4 50 BALSA LEASING EDGE 77 APW H B SPR E 1/4 BALSA SHEET 1/4 BALSA SHEET 1 TYPICALBALSA HINGE TOR MW JOINER1/4 3/B AND HORNBALSA 3/321/4 BALSA RIBS 3/22 BALSA HALF RIBS WING DIHEDRAL BREAK 3NP [KGRABBER -A PLANRIGHT SIDE 3/32 BALSA 1 - I/lB BALSA CENTER SECTION SHEETING TOP N BOTTOM 3/32 PLYWOOD —4 PIHEDRAL BRACE ~-BALSA GUSSETS --1/4 BASS OR PINE SHAPE TO MATCH T STOCK 7 DIHEDRAL AT EACH WING TIP 4 LAMINATIONS OF I/IN 1/4 BALSA-WING TIP I/4I BALSA TE STOCK 3/IN SO BALSA /4 BALSA SHEET UNSANDED 3/W3/B BALSA 7 3/32 3/IN BALSA FILLER3/32I/4 BASA SANDED FIN/RUDDER B STAB/ELEV CONSTRUCTION 3/IN PLYWOOD V4BALSA SHEET7 OUTLINE GRABBER NOTE SAM EGAL ENLARGEMENT OF 941 ROW- P F RECORD HOLSER I/4 3/B BALSA ENLARGED SO% AND CONVERTED TO N/C ENGINE 19 -25 TWO CYCLE ON 40 FOUR CYCLE SPAN 72 WING CHORD 10- AREA 700 50 IN SAM MIN WT 49 02 PROTOTYPE WT SI 02 POWER 31 CU IN 0345B MODEL AVIATION THE ORIGINAL FLY BABY Li PETE BOWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS TRACING BY OETEM~ ALL RIGHTS O SHEET 2 OF 2 Full-Size Plans AvailableSee Page 196 Kings Symbol Power Sceptor fly Sceptor youre King Hill Bushwacker Designed low power sport flyer Bushwacker flies well 15 20 size engine large wing area light wing loading make Bushwacker almost powered glider will surprise its performance Construction wood straight forward Due complexity recommend intermediate builderlflyer PRICESSuggested Retail Windrifter$ 7695 Bushwacker$ 7395 Mini Bird$ 5695 Stepp Two$ 4795 R V 4$10695 Folke WuIfe 190$10995 P-47 Master Scale$17495 Mystique$ 7995 SCEPTOR MODELS 1934 Comanche Street Oceanside California 92056 619-726-4971 box perfectly square fore aft well top bottom preferred method finishing rear section fuselage leave building board jack up tail post centerline exactly one-half fuselage width Using plan top view cut cross braces pairs install An alternate conventional technique position box wing saddle top view pull tail section gether over plan Regardless method used ensure fuselage straight along centerline Planking hatch area over fuel tank best accomplished stringy sheet balsa soaked ammonia water Using thick Hot Stuff attach sheet base curl up over bulkheads bead CyA opposite side installed same manner making joint top slicing through both halves straight edge Several cuts may required nice seam window frames cut / ply thickness commonly used cover foam wings Using plan guide trace patterns carefully cut out glue fuselage frames provide hidden seam installing clear plastic windows inside will done later using RC 56 An extra filler piece basswood pine now epoxied top F-3 crosspiece wing-seat front pieces will reinforce bracket grab ber tank seated Lite Ply floor plumbing running through engine mount cutout Standard throttle control ca ble used bottom sheeting sanded side taper before its installed thick Hot Stuff Several narrow strips can used lieu single sheet fuselage finished ready covering round longerons pleas ing shape sand nose blocks final shape thickness cheek blocks will vary depending engine installation Notice 25 two-stroke installation shown has thicker ones course thicker cheek blocks greater nose weightand narrower mount will necessarily Finally epoxy front dowel cabin roof Wing-fuselage assembly Drill Y16-dia hole exact center hardwood cen ter section trailing edge Its fore/aft location trailing edge based center hole Du-Bro bracket mounted exact center F-3 Bolt wing onto fuselage Clamp 3A 6 ply grabber against face dihedral brace After pinning end piece heavy string center rearmost fuselage use string check wing tips precisely equi distant Adjust grabber accordingly youre completely satisfied alignment epoxy permanently place 32 Model Aviation crptnr NDRI FiFES WHATEVER YOUR ABILITY THE WINDRIFTER MAKES YOUR FLYING EASIER DELUXE QUALITY KIT DIE CUT RIBS ALL HARDWARE INCLUDED SPOILER KIT INCLUDED Wing Span 2 pecel998 99ng Asee903 sq ro Lifting Sottace1042 sq n Wing Loading638 oz/tt FIpng wegttt4000 AotOlFell5l cthoot ballast Up 4 lbs ballast nap added concept grabber unique Fly Baby 72 have used success fully 12 different designs thus farand have yet see fail wild spins beginner however advised con sider using old-fashioned rubberbands fastening wing Once wing-fuselage assembly com pleted build forward cabin roof Trac ing outlines plan cut two pieces %2 balsa noticing grain direc tion soaked ammonia water laminated using thick Hot Stuff molded fit leading edge wing contour Make sure doesnt stick wing Reinstall wing fuselage adjust roof piece perfect fit glue perma nently fuselage Covering preferred method cover smallest pieces first MonoKote works well Cover fin rudder stabilizer elevator separately cut slots hinges Cover entire fuselage cut out stabilizer slot fin mounting area Similarly cover over windows cut away material installing clear plastic later Slide stabilizer its slot epoxy place after assuring proper midline horizontal-plane alignment Slip fin its slots adjust vertical alignment epoxy place Hinge rudder eleva tor sliding molded hinges pre cut slots securing toothpick segments Hot Stuff color trim model accom plished spraying red Poly-U onto MonoKote covering lightly buffing No 400 steel wool Sig Stripe-Rite makes excellent masking tape since %2 A-in tape will flex around curves quite easily Seal edges against fuel seepage brushing clear Sig Skybrite spray misted can held 12 surface Try smooth thin coat gives semitransparent effect contrasting trim done StripeRite tape sealed clear Skybrite vi nyl numbers purchased office supply store nose area tank com partment fuel-proofed clear Sky brite before painting Radio installation control Ny-Rod stiffened along its length cross members made up scrap balsa connector servo end soldered clev adjustable clevis attached horn control surfaces servos installed pair hardwood beams glued Lite Ply Hot Stuff battery installed bay between F-I F-2 first bay hind firewall easily accessed model balanced quite well RC com ponents positioned drawn Flying preflight testing home away added pressure flying Continued page 146 TM FUEL WIZZARD THE WORLDS FASTEST AND MOST CONVENIENT FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE * DURABLE FOR LONG LIFE FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS SUGGESTED RETAIL $ 995 NOW JUST $ 750 EPRINT PLEASE ENTER MY ORDER FOR FUEL WIZZARDS AT $ 750 POSTAGE PAID ENCLOSE CHECK OR MONEY ORDER NAME STREET ADDRESS___________________ APT NO________ CITY________________________ STATEZIP_______ SEND TO ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 4 DEALER INQUIRIES INVITED October 1989 33 SEE YOUR DEALER OR ORDER DIRECT FROM TILTS AD PRECISION MODEL PRODUCTS uzZZ7Is# Made U S BARSTOCK ALUMINUM SPINNERS Pan No Size TT-150-B .. 1-1/2 TT-175-B . 1-3/4 TT-200-B 11-225-B .. 21/4 11-226-B .. 2-1/4 FAI . TT-250-B . 2-1/2 TT-251-B . 2-1/2 FAI .. TT-275-B 3/4 TT-276-8 .. 2-3/4 FAI .. 11-300-B 11-301-BPAl TT-325-B . 3-1/4 TT-350-B /2 TT-375-B .. 3-3/4 11-400-B 4 RetailApprox PriceWeight $1395058 02 149509502 159510002 169516002 189515002 189519002 209517002 229522002 249520002 269526002 289525002 369534002 499547002 599552002 699557002 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add 5300 Per Spinner PROP NUT ADAPTORS Part No Size TT-140-A . 1/4-28 TT-147-A 4-28/7mm . TT-610-A 10mm TT-710-A 10mm TT-516-A '5/16-24 TT-518-A .. 5/16-24/8mm IT-BiD-A x 10mm TT-825-A . 8x 125mm TT-375-A3/8-24 TT-125-A x 125mm Retail Approx Price Weight $495 061 02 49506102 49506302 49508202 495 602 49507602 495076oz 495 .. 075 02 595 117 02 595 02 3 Pieces Nut Washer anti Machined Bushing Add S350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 other 357th alumnus Chuck Yeager alive well TV again again think single-seat Dornier-335 Air Space Museum Washington DCpossibly same wife Helen beginning push 70 pretty hard both still ac tive licensed pilots have dabbling RC several years am enclosing picture freehand scratch-builts little 50 Saito powered 514-pounderreferred Round big 13-lb 8footer named Mr Big Its powered Zenoah 23 Both fly very well Harvey Mace Ft Bragg CA Safety/Preston Continued page 22 letter stated story apparently first sur faced 1967 So happen prefer assem bling models components arc welding rather gluing also weareontact lenses dont alarmed saw warning National Newsletter Its just true Have another safe Fly Baby/Mathews Continued page 33 site Test range free surface movement deflections per plans engine carbure tor needle settings engine-on radio op eration Finally important make sure model balances slightly ward center-of-gravity shown plans Add ballast needed Dont fly model tail-heavy everything checks out OK Fly Baby ready big try field head wind add little right rudder advance throttle youre air borne 12 ft adding up elevator youre taking off downwind Remember climb rate func tion engine speed elevator Dont horse airplane around heavy-handedly gentle caresses thats needed Take model up bit throttle down dead slow Still isnt sinking much Find little thermal shut engine off Now isnt something kind flying too sedate taste try some slow-speed touch-andbumps Hows easy Did ever prettier Whatever style flying youll find Old-Timer will oblige Versatile brisk smooth responsive Fly Baby will exactly what want See yourself isnt up date Old-Timer could ask dB Facts/Abbott Continued page 35 erates Quiet whisper 20 dB Conversation 65 dB Loud orchestra 80 dB Start danger 90 dB Amplified rock band 110 dB Threshold pain 130 dB Federal agencies have established recom mended standards safe noise exposure eight hours per day 90 dB two hours per day 100 dB less one-quarter hour per day 115 dB Lets reexamine AMA FAI cri teria Current AMA90 dB 9 ft Old FAIl00 dB meter Current FAI98 dB three meters order compare recommenda tions need convert single distancein case 9 ft Thats easy enough involves converting meters feet meter ft applying inverse square law discussed above results Current AMA90 dB 9 ft Old FAI912 dB 9 ft Current FAI988 dB 9 ft As can see new FAI regulation considerably less stringent old 146 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManse K&B FUELS K&B Glow PLUGS 9 Blends4 Choices Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co Electric Motors Rubber Tissue Cox Parts Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 Letters Editor Continued page 12 V
Edition: Model Aviation - 1989/10
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 146
NO OCR TEXT NO OCR TEXT delight Just thought enlarging design seems strengthen its inherent esthetics Little wonder Bowers plagia rized earlier design using same sur face outlines time came de velop entry FAA home-built mar ket outlines dimensions totally SAM legal model blown up com mercial blueprinter using photo enlarger requirements modern RC gear dic tated several structural changes Also developed unusual much simpler sys tem building symmetrical sectioned tail surfaces Two-stroke power adequate Fly Baby prototype has flown both Fox I9BB OS 25 FSR though model could also le gally powered 30 An OS 40 fourcycle engine proved delight 40 four-stroke still legal since SAM rules count 60% four-stroke displacement compared two-stroke Though Fly Baby has yet flown floats illustrated 1945 Model Airplane News article plan try ap proach Should 72-in version prove delightful flying off water air will very likely publish enlarged float plans later date floats model absolute doll Slow speed flight characteris tics outstandingitll almost fly back wards wind Thermaling ability ex cellent Fly Baby will ride very light lift ease Because its steep dihedral will turn tightly strong thermal no tendency spin out Fly Baby 72 also excels sport role has incredibly short takeoff roll good control model flies docilely please 35% power yet will climb like bandit firewall Landings slow controlled bad pilot looks good model does loops spins lovely stall turns making flying re laxed fun experience model good Pete Bowers Fly Baby can get better transla tion Larger easier track orig inal radio controlled greater versatility utility offering new easier con struction techniques updated model makes hard-to-beat choice Old-Timer flying Whether youre going all-out competition just plain old fun-flying rundont walkto workbench Construction As drawn Fly Baby about minimum weight strength youll using model exclusively sport flying consider strengthening substituting spruce wing spars fu selage longerons increased weight would however somewhat reduce mod els slow speed performance characteristics novice RC fliers tendency fly solid objects single dowel front double post rear cabin rubberbanding wing would advisable grabber system shown plans sufficiently strong under normal use damage cabin roof could oc cur wing tip strike anything solid recommend using thick-grade Hot Stuff cyanoacrylate CyA adhesive project Five-minute epoxy works best ply-to-balsa joints wood sizes standard stock Light weight C-grain sheet ideal Beware un 26 Model Aviation Based color trim scheme Bowers used original full-scale home-built Fly Baby RC model generates quite large head turning quotient dressed its bright yellowand-red transparent polyurethane covering covering technique discussed text Inc siaoiiizer seciion ouiit flat men yiiier sheets added sanded symmetri cal section tried-and-true method constructing truly warp-tree structure Also shown rudder control horn Left A wide range power 20 40 can used model minor modifications 19 engine shown proved ideal choice very smooth idle adequate power Right Close-up servo mounting arrangementAce Bantam ser vos tray Note dowel cabin front part wing attachment setup dowel slides grabber arrangement wing leading edge single nylon bolt through trailing edge screws Du-Bro fitting secure wing position Very simple strong WILWJ ~Yf E PETE OWER VIA DOC MA1ThEW& BALOA ~QBAL&A Ysz BJ1LR PLANKING 25 ENGI~ BRLA Y8 DIA MUSIC diR 3 WHLO . 4 LAMLWRTION 6K 4 B5U&A WIN& TIP CAP W/Y4XY8 PRUC PLC /X2 34 BALSA 3/x4 y QBRLA B1LA 8ItT x Y4 BL8A ThIS Fl eiB CONVEI NLCL 10 ELECTRIC RYJR ACE IThRNRTURPL 0LIVT CllN USEP RINDLY. MKE8 FO IiRPP NEIGORS _____ \ /. BELIEVE ira Left The fuselage rudder stabilizer covered painted prior assembly covering carefully cut away epoxy will applied final assembly photo tail section shows stabilizer ready positioned slot provided fu selage elevator rudder yet installed Right stabilizer place hinges attached elevator linkage hooked up elevator assembly installed stabilizer technique provides neat buried elevator horn minimum hassle graded bundles can lot wast age Hardware fittings standard hobby shop stock items / ply used window frames common stock ten used skinning foam wings cant beg scraps Pattern fliers club hobby shop doesnt carry order thin ply Sig Tail surfaces Since empennage structure involving out-of-the-ordinary construction methods well tackle first symmetrical tail surface sections em ployed original design must dupli cated model SAM legal plane will purely sport however can ignore SAM requirement case build surfaces /4 x A-in stock using conventional techniques Since believe building either flat surface jigs developed fol lowing method project Build flat work surface Trace outlines onto appropriately sized wood slipping car bon paper between plans wood point follow standard build ing techniques Pin down glue together -in sta bilizer elevator center sections Re move dry add 3/ x /16 strips both sides original ribs strips butt against 3/6-sq strips added top bottom hinge spars per plans Once pieces have glued place use sanding block create symmetrical air foil technique shown plan side view much easier shim ming outlines cutting out ribs Its also stronger lighter struc ture looks exactly same covered Wing As tail surfaces trace rib patterns balsa stock using carbon pa per Stack cut knife jigsaw carefully sand final shape Notching trailing edge rib interface adds strength Pin trailing edge over 28 Model Aviation Left Partially finished wing showing half-ribs leading edge rib outline drawings clarify laminated tips positioned slots create accurate tip assembly Half-ribs novel Old-Timer case re-create system Bowers used home built also allow smoother covering avoiding tendency sag Right Universal clamps clothespins being used hold three formers fuselage sides alignment before final cementing Use triangles squares flat surface ensures true fuselage Left Early stage wing construction Note laminated wing tip structure fits against spar ends accommodate upward taper wing Right photo shows simple foam board pattern used laminate wing tips author prefers laminating technique use bamboo dural wire Balsa basswood can used ease technique can used laminating applications NYLON MOTOR MOUNT TO SUrF3A6 PLYWOODI/B LITE PLYI/B LITE PLY MOTOR McKJNT FORCUT-OUT FORv SQ FOUR CYCLE ENGINE4 OZ SULLIVAN4SQ BALSA SS-4 FUEL TANKBALSA 3A6 PLYWOODOPTIONAL NOSE FOR/- LO CLIPSPLY FOUR CYCLE ENGINEI/B NYLONI/8LITE/1yLITE 1/4 3/4 3/IA PLYWOODBASSWOOD _______F- 4I F-2F-3LWe 3M BASSWOOD SASA ShEETI/B SIP MUSIC WIRE MOTOR MOUNT FOR ITU coness SelerminedVIEW FOR PLACEMENT OPTIONAL Engine ChoiceFODR CYCLE ENGINEIN ODNSTRUCTION FIREWALLLANDING GEAR DETAIL 1 40 FOUR CYCLE ENG 0 FOUR CYCLE 3/33 BALSA PLANKINGI/As 3/4 SASS RH T COWL PIECES 4 OZ TANKII SERVOS S LAYERS OF 3132 BALSA NOTE GRAIN SOAK IN SNBsIORIA 8 FORM TO UNDERSIDE OF WING-USE CYP B INSTALL DEFLECTIONS RUDOER S1OTAL NYLON MOTOR x - AELEVATOR L MOUNT 1/4 BALSA SHEET1/16 DIP MUSIC WIRE 0LS DIP MUSIC WIRE 0 FUSELAGE SIDE VIEWMODEL AVIATION 0015 CLEAR PLASTIC TRIM TO FITTHE ORIGINAL FLY BABY LT PETE BoWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS 0 2 3 4 5 5TRACING BY JOE DEMARCO WINDSHIELD PATTERNSHEET OF 2 RIGHTS RESERVED Full-Size Plans AvailableSee Page 196 plans position notches cut out jigsaw blade reversed visual reference Since x %-in balsa stock invariably seems warped its best laminate front wing spar spruce balsa Posi tion spruce top since bottom will flared tips wing tips laminated over foam board cardboard form Moisten balsa diluted ammonia water coat al iphatic resin such Sig Bond slowly pull sandwich end form other Use masking tape hold strips place set Youll find technique will result strong lightweight structure Once laminated wing tips dry pin slot cut trailing edge onto shaped spar faces Bevel bottom tip lamination fair trailing edge wing tips can also installed wing off board wary warping center section built integral part left wing panel Use center section rib pattern plan trim down three ribs before adding sheeting Use tilt jig plans establish dihedral angle right left wing panel base ribs sheeting will stalled after wing fitted fuse lage grabber also added later tilt jig used properly set center wing joint rib thats required block up wing tips carefully sand final dihedral angle Make sure three center section ribs absolutely vertical Join panel center section ep oxy along rib faces spar joints Clamp place until epoxy sets spring-type clothespins Repeat process other wing panel Using razor saw cut necessary slots ribs %2 ply dihedral brace wing joiner Epoxy place against back main spar Sand leading edge shape shown plan After final sanding check wing alignment set aside Fuselage Build side over other di rectly plans Use scraps masking tape glue joints prevent sticking Note longerons extend fire wall Dont cut off stubs glue curing cut out jig bulkheads F-2 F-3 Lite Ply prefer able bulkheads due its ease cut ting regular ply may substituted Lay bulkheads directly over plans glue CyA Trace off patterns firewall F-i bulkhead using carbon paper Cut notches fit precisely possible Pre bend landing gear wire drill strap screw holes dont install gear permanently time Separate two side units popping apart table knife Trim sand smooth Replace right side building surface weight down secure ly Trial fit four bulkhead units good joints place appropriate slots fuselage side Use carpenters square 900 triangle ensure perfect alignment youre satisfied glue place Place left side over bulkheads re peat alignment process glue side slots should now have 30 Model Aviation Len I ne two Vuselage sides built one-over-the-other barrier strips masking tape substituted classic waxed paper ladder formers landing gear installed notched assist alignment Right assembled fuselage graced beauty pe culiar stick-and-strip structures modern adhesives construction methods assemblies no longer difficult build i57j structure airplane completed point wing alignment simple piece string used assure proper alignment wing prior drilling hole trailing edge bolt Equal distance center fuselage tail same point wing tip will square wing fuselage Clamp securely drilling mounting hole model temporarily assembled its bare bones give idea its general arrange ment Notice antiflex brace pushrods position single wing bolt 4 LAMINATIONS OF I/l6 1/4 BALSA 3/32 BALSA SHEET C GRAIN 7 DIHEDRAL AT EACH WING TIP I/4BO BALSA LEADING EDGE PLAN LEFT SIDE 1/4 1/2 BALSA SPAR WITH I/4 I/B SPRUCE CAP Kr 1/4 BALSA TRAILING / EDGE STOCK WING RIB 3/32 BA5A SHEET CENTER SECT RIB WING TIP RIB 3/32 C-GRAIN RALSA HALF RIB 3/32 PLY DIHEDRAL 3/32 BALSA SHEET BRACE BLOCK SAND AFTER INSTAIING /4 BALSA SPAR BALSA GUSSET -77 3/32 BALSA RIBS B HALF RIBS SHIM UP 3/IN SHIM UP I/IN I/4 1/2 BALSA SPAR 3/32 PLY DIHED BRACE TILT JIG 7 1/4 50 BALSA LEASING EDGE 77 APW H B SPR E 1/4 BALSA SHEET 1/4 BALSA SHEET 1 TYPICALBALSA HINGE TOR MW JOINER1/4 3/B AND HORNBALSA 3/321/4 BALSA RIBS 3/22 BALSA HALF RIBS WING DIHEDRAL BREAK 3NP [KGRABBER -A PLANRIGHT SIDE 3/32 BALSA 1 - I/lB BALSA CENTER SECTION SHEETING TOP N BOTTOM 3/32 PLYWOOD —4 PIHEDRAL BRACE ~-BALSA GUSSETS --1/4 BASS OR PINE SHAPE TO MATCH T STOCK 7 DIHEDRAL AT EACH WING TIP 4 LAMINATIONS OF I/IN 1/4 BALSA-WING TIP I/4I BALSA TE STOCK 3/IN SO BALSA /4 BALSA SHEET UNSANDED 3/W3/B BALSA 7 3/32 3/IN BALSA FILLER3/32I/4 BASA SANDED FIN/RUDDER B STAB/ELEV CONSTRUCTION 3/IN PLYWOOD V4BALSA SHEET7 OUTLINE GRABBER NOTE SAM EGAL ENLARGEMENT OF 941 ROW- P F RECORD HOLSER I/4 3/B BALSA ENLARGED SO% AND CONVERTED TO N/C ENGINE 19 -25 TWO CYCLE ON 40 FOUR CYCLE SPAN 72 WING CHORD 10- AREA 700 50 IN SAM MIN WT 49 02 PROTOTYPE WT SI 02 POWER 31 CU IN 0345B MODEL AVIATION THE ORIGINAL FLY BABY Li PETE BOWERS MAN APRIL 1945 ENLARGED B CONVERTED BY DOC MATHEWS TRACING BY OETEM~ ALL RIGHTS O SHEET 2 OF 2 Full-Size Plans AvailableSee Page 196 Kings Symbol Power Sceptor fly Sceptor youre King Hill Bushwacker Designed low power sport flyer Bushwacker flies well 15 20 size engine large wing area light wing loading make Bushwacker almost powered glider will surprise its performance Construction wood straight forward Due complexity recommend intermediate builderlflyer PRICESSuggested Retail Windrifter$ 7695 Bushwacker$ 7395 Mini Bird$ 5695 Stepp Two$ 4795 R V 4$10695 Folke WuIfe 190$10995 P-47 Master Scale$17495 Mystique$ 7995 SCEPTOR MODELS 1934 Comanche Street Oceanside California 92056 619-726-4971 box perfectly square fore aft well top bottom preferred method finishing rear section fuselage leave building board jack up tail post centerline exactly one-half fuselage width Using plan top view cut cross braces pairs install An alternate conventional technique position box wing saddle top view pull tail section gether over plan Regardless method used ensure fuselage straight along centerline Planking hatch area over fuel tank best accomplished stringy sheet balsa soaked ammonia water Using thick Hot Stuff attach sheet base curl up over bulkheads bead CyA opposite side installed same manner making joint top slicing through both halves straight edge Several cuts may required nice seam window frames cut / ply thickness commonly used cover foam wings Using plan guide trace patterns carefully cut out glue fuselage frames provide hidden seam installing clear plastic windows inside will done later using RC 56 An extra filler piece basswood pine now epoxied top F-3 crosspiece wing-seat front pieces will reinforce bracket grab ber tank seated Lite Ply floor plumbing running through engine mount cutout Standard throttle control ca ble used bottom sheeting sanded side taper before its installed thick Hot Stuff Several narrow strips can used lieu single sheet fuselage finished ready covering round longerons pleas ing shape sand nose blocks final shape thickness cheek blocks will vary depending engine installation Notice 25 two-stroke installation shown has thicker ones course thicker cheek blocks greater nose weightand narrower mount will necessarily Finally epoxy front dowel cabin roof Wing-fuselage assembly Drill Y16-dia hole exact center hardwood cen ter section trailing edge Its fore/aft location trailing edge based center hole Du-Bro bracket mounted exact center F-3 Bolt wing onto fuselage Clamp 3A 6 ply grabber against face dihedral brace After pinning end piece heavy string center rearmost fuselage use string check wing tips precisely equi distant Adjust grabber accordingly youre completely satisfied alignment epoxy permanently place 32 Model Aviation crptnr NDRI FiFES WHATEVER YOUR ABILITY THE WINDRIFTER MAKES YOUR FLYING EASIER DELUXE QUALITY KIT DIE CUT RIBS ALL HARDWARE INCLUDED SPOILER KIT INCLUDED Wing Span 2 pecel998 99ng Asee903 sq ro Lifting Sottace1042 sq n Wing Loading638 oz/tt FIpng wegttt4000 AotOlFell5l cthoot ballast Up 4 lbs ballast nap added concept grabber unique Fly Baby 72 have used success fully 12 different designs thus farand have yet see fail wild spins beginner however advised con sider using old-fashioned rubberbands fastening wing Once wing-fuselage assembly com pleted build forward cabin roof Trac ing outlines plan cut two pieces %2 balsa noticing grain direc tion soaked ammonia water laminated using thick Hot Stuff molded fit leading edge wing contour Make sure doesnt stick wing Reinstall wing fuselage adjust roof piece perfect fit glue perma nently fuselage Covering preferred method cover smallest pieces first MonoKote works well Cover fin rudder stabilizer elevator separately cut slots hinges Cover entire fuselage cut out stabilizer slot fin mounting area Similarly cover over windows cut away material installing clear plastic later Slide stabilizer its slot epoxy place after assuring proper midline horizontal-plane alignment Slip fin its slots adjust vertical alignment epoxy place Hinge rudder eleva tor sliding molded hinges pre cut slots securing toothpick segments Hot Stuff color trim model accom plished spraying red Poly-U onto MonoKote covering lightly buffing No 400 steel wool Sig Stripe-Rite makes excellent masking tape since %2 A-in tape will flex around curves quite easily Seal edges against fuel seepage brushing clear Sig Skybrite spray misted can held 12 surface Try smooth thin coat gives semitransparent effect contrasting trim done StripeRite tape sealed clear Skybrite vi nyl numbers purchased office supply store nose area tank com partment fuel-proofed clear Sky brite before painting Radio installation control Ny-Rod stiffened along its length cross members made up scrap balsa connector servo end soldered clev adjustable clevis attached horn control surfaces servos installed pair hardwood beams glued Lite Ply Hot Stuff battery installed bay between F-I F-2 first bay hind firewall easily accessed model balanced quite well RC com ponents positioned drawn Flying preflight testing home away added pressure flying Continued page 146 TM FUEL WIZZARD THE WORLDS FASTEST AND MOST CONVENIENT FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE * DURABLE FOR LONG LIFE FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS SUGGESTED RETAIL $ 995 NOW JUST $ 750 EPRINT PLEASE ENTER MY ORDER FOR FUEL WIZZARDS AT $ 750 POSTAGE PAID ENCLOSE CHECK OR MONEY ORDER NAME STREET ADDRESS___________________ APT NO________ CITY________________________ STATEZIP_______ SEND TO ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 4 DEALER INQUIRIES INVITED October 1989 33 SEE YOUR DEALER OR ORDER DIRECT FROM TILTS AD PRECISION MODEL PRODUCTS uzZZ7Is# Made U S BARSTOCK ALUMINUM SPINNERS Pan No Size TT-150-B .. 1-1/2 TT-175-B . 1-3/4 TT-200-B 11-225-B .. 21/4 11-226-B .. 2-1/4 FAI . TT-250-B . 2-1/2 TT-251-B . 2-1/2 FAI .. TT-275-B 3/4 TT-276-8 .. 2-3/4 FAI .. 11-300-B 11-301-BPAl TT-325-B . 3-1/4 TT-350-B /2 TT-375-B .. 3-3/4 11-400-B 4 RetailApprox PriceWeight $1395058 02 149509502 159510002 169516002 189515002 189519002 209517002 229522002 249520002 269526002 289525002 369534002 499547002 599552002 699557002 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add 5300 Per Spinner PROP NUT ADAPTORS Part No Size TT-140-A . 1/4-28 TT-147-A 4-28/7mm . TT-610-A 10mm TT-710-A 10mm TT-516-A '5/16-24 TT-518-A .. 5/16-24/8mm IT-BiD-A x 10mm TT-825-A . 8x 125mm TT-375-A3/8-24 TT-125-A x 125mm Retail Approx Price Weight $495 061 02 49506102 49506302 49508202 495 602 49507602 495076oz 495 .. 075 02 595 117 02 595 02 3 Pieces Nut Washer anti Machined Bushing Add S350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 other 357th alumnus Chuck Yeager alive well TV again again think single-seat Dornier-335 Air Space Museum Washington DCpossibly same wife Helen beginning push 70 pretty hard both still ac tive licensed pilots have dabbling RC several years am enclosing picture freehand scratch-builts little 50 Saito powered 514-pounderreferred Round big 13-lb 8footer named Mr Big Its powered Zenoah 23 Both fly very well Harvey Mace Ft Bragg CA Safety/Preston Continued page 22 letter stated story apparently first sur faced 1967 So happen prefer assem bling models components arc welding rather gluing also weareontact lenses dont alarmed saw warning National Newsletter Its just true Have another safe Fly Baby/Mathews Continued page 33 site Test range free surface movement deflections per plans engine carbure tor needle settings engine-on radio op eration Finally important make sure model balances slightly ward center-of-gravity shown plans Add ballast needed Dont fly model tail-heavy everything checks out OK Fly Baby ready big try field head wind add little right rudder advance throttle youre air borne 12 ft adding up elevator youre taking off downwind Remember climb rate func tion engine speed elevator Dont horse airplane around heavy-handedly gentle caresses thats needed Take model up bit throttle down dead slow Still isnt sinking much Find little thermal shut engine off Now isnt something kind flying too sedate taste try some slow-speed touch-andbumps Hows easy Did ever prettier Whatever style flying youll find Old-Timer will oblige Versatile brisk smooth responsive Fly Baby will exactly what want See yourself isnt up date Old-Timer could ask dB Facts/Abbott Continued page 35 erates Quiet whisper 20 dB Conversation 65 dB Loud orchestra 80 dB Start danger 90 dB Amplified rock band 110 dB Threshold pain 130 dB Federal agencies have established recom mended standards safe noise exposure eight hours per day 90 dB two hours per day 100 dB less one-quarter hour per day 115 dB Lets reexamine AMA FAI cri teria Current AMA90 dB 9 ft Old FAIl00 dB meter Current FAI98 dB three meters order compare recommenda tions need convert single distancein case 9 ft Thats easy enough involves converting meters feet meter ft applying inverse square law discussed above results Current AMA90 dB 9 ft Old FAI912 dB 9 ft Current FAI988 dB 9 ft As can see new FAI regulation considerably less stringent old 146 Model Aviation Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneManse K&B FUELS K&B Glow PLUGS 9 Blends4 Choices Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co Electric Motors Rubber Tissue Cox Parts Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 Letters Editor Continued page 12 V