GRUMMAN introduced S-2F Tracker little fanfare shortly after World War II Among least known great Grumman aircraft have seen considerable action worlds navies S-2F nevertheless remains service today fact United States Canada have adapted airplane use firebomber As Control Line Scale model firebomber version S-2F probably unique Two experiences motivated build movie Always its hauntingly accurate portrait firebombers highly explosive environment Fire Eater 7 Inspired boyhood memo ries borate bombers movie Al ways Will twin 0496 soon humming flying field too Updated firebomber Control Line Scale twin-049 model lesser-known Grumman design guaranteed turn heads flying field EAllen WuIf 7 4 LUW4 1 RACKER ne aunor IS ssicier Tar auineniic aelal, aown ins airorusnea exnauss sireaKs authors CL Scale original profile view Dubbed Fire Eater 7 model realistic appearance yet easy build An ingenious drop mechanism ejects red tempera powder borate firebomber role no figment authors imagination reflects actual use S-2F United States Canada todaythough Japan Grumman design used coastal patrol craft Full-Size Plans Available Page 188 41 RIWIT EBUWV450 LL1/irsHi iTIP WAGHTva piy maI/B lIARS SEABLICOW a BOTTOMtRACKS MAKE 2 ECKVAIORB ii I IIIIIIII IiIIIIIIII ~-ti-wMOEsIT4II -111-ZIjW-31W-41 W4IWa IIA-ei- Iiw.w1w. IiIIi F 3SBT ARIE LOCATAMS V4U TI TAS hEFTF iax I/4 A/ARElatEALUM POP CAR- COWL IARWITWIB -I/32 lEA LEASOUTSaSONWA/Ioowas soEws2 PLACUlrsHE ABet PLAII z-B~414 CRUTCH 1111 IIII iiii IIii II, 34 OH EG TIP WRAP JOINT A/GLASS TAMIHRAP A/WAU 5 CLOTH A-7~ Bias FROM __EXCEPT AI MARE IS/S25llT TSP MARE ZEACHIF Wa F IPZF4 IN-IN-Sa-s -IAB WIT PLELPILL 1JBE5 WITH HASA I55049 BLACK MEOW posonoa B-A MARE 4 SF I/B SHT I1/1K MA ____________FORK LLERIMWLaS 5/35 WIT LU - F-5FR BALANCE PT ~I/3S5TTRERE7 EAR DOORS BLOCK NOSE }TZ WRAPII DOWELF-IpS ~WU62F Tiacker BALLEN BSLF B sOLDERU5545B9919Ij fly took back summer 10 hot afternoon Id watch excitedly B-17s B-26s PBY-4Ys fueled up filled thick red borate taxied end runway Seeing hearing feeling big machines rumbled staggered air real thrill article Air & Space magazine learned about contemporary usage Grumman S-2F firebomber suppose diminishing supply WW II bombers made inevitable yet never thought S-2F potential attack plane strictly submarine hunter equipped supply sonar buoys little else hadnt imagined carrying torpedoes well An yet undiscovered Control Line Scale subject can difficult find days Looking through some plan catalogs found ordered CL version the S-2F built 1970s plan revealed faithful Scale model Navy version just bit smaller conceptualized twin-engine /2A firebomber version would update model make unique Weve seen cropdusters dust military bombers drop bombseven Japanese bomber launched kamikaze glider borate drop would take some doing wouldnt neat test idea first revived two dormant 049 engines slipped balsa bed shaped like S-2F Making borate next challenge Everything tried red mud red paint either thinned out invisibility fell emerged big glop solution cameas flashes creativity often meduring course bath Pouring Mr Bubble powder childs bath suddenly realized powder would perfect borate would look authentic bomb bay wouldnt have made watertight Red tempera powder looks exactly right slipstream sculpts resemble real borate flows out model Twin-engine hA models great fun invite experimentation yet inexpensive quick build Squadron/Signal Publications Inc offers excellent volume S-2F Tracker book includes color views January 1992 53 Bottom-up view S-2F showing clean-lined looks wheel well doors openings military civilian versions configurations markings offers bit information about Turbo-Tracker now being built Canada United States could miniaturize Turbo-Tracker different look entirely too borate bomber doesnt catch fancy could go torpedo sonar-buoy drop forget about drop sort simply make fun flier Construction Select test engines before building success twin-engine model begins engines reliable matched must able start engines quickly easily power output should approximately equal Control Line models however skewing power output slightly favor inboard engine advantage outboard engine quits slightly powerful inboard will help keep lines taut borate drop mechanism too complicated ready illustration omitted plan Basically mechanism involves set doors spring loaded close rubberbands pair spring-loaded cams rams doors open cams tripped pulling third lead-out system took lot monkeying works may well come up simpler setup make working model drop mechanism before building fuselage Youll need adjust fuselage construction accommodate particular system Wing Begin making inboard left panel Trim sheet A6 x 4-in balsa fit between leading trailing edges LE TE Pin balsa sheet LE TE over plan Glue ribs except W-l place Install bellcrank its mount String lead-outs through inboard wing Make basic pushrod 1/16 music wire pushrod should extend good eight inches beyond trailing edge point will joined rear twin pushrods after wing has installed glue has set remove inboard wing building board position over plan Build right panel directly atop left Pin down leading trailing edges taking care glue mating leading trailing edges opposite wing Glue ribs W-2 through W- 11 wing tip weight Cut out two plywood dihedral joiners fit center section make small balsa wedges achieve accurate fit Carefully cut two wing panels apart Sand bevel dihedral angle Pin panel building board block up other 1 Epoxy panels together Install dihedral joiners W-l Add top wing spar Lift wing off board dihedral joint has set plank top surface 1A6 sheet Add wing tip blocks Drill lead-out holes install bushings left tip Carve leading edges wing tips shape Sand entire wing thoroughly Coat center section epoxy reinforce center joint lightweight fiberglass cloth Tail surfaces high-placed stabilizer dihedral presents couple challenges assembling tail done little differently usual Continued page 147 54 Model Aviation IIC 0ItJIJft@ catiy U. limits takeofib iu dirt paved . aci - engine soda pop cans ruggea ana realislic Plenty cooling air enters through open fronts exit flaps direct air over wing Contrarotating props came dusty box local hobby shop twin elevator horns less compli cated appear hardest part getting pushrods out fit Goldberg nylon Snap R Keepers make easier work assembly adjusting lead-outs made lightweight ca ble exit through thin nylon tubes third line part bomb bay mecha nism Pulling lead-out trips pair spring-loaded cams connected ramming bomb bay doors open BRAIN TEASER FOUR CELLS OR FIVE friend asked What effect using five-cell Ni-Cd pack place fout-cell pack Isnt voltage same four alkaline dry cells arent radios designed work way Shouldnt get operating time five-cell pack Let make important point cell has two ends make contact circuit Assuming four cells flight pack eight places pack poor spring contact can destroy plane Thats Ni-Cd flight packs welded together Lets look test data measured airplanes has Futaba receiver four regular servos Idle current four-cell pack A Idle current five-cell pack A Same setup two servos loaded 30 -oz about mum torque lead sinkers Four-cell pack mA Five-cell pack mA First notice five-cell pack delivers extra 20 mA both unloaded idle loaded conditions important fact increase battery pack voltage increase idle current increase applies time system Second notice current drawn servo under constant mechanical load stalled isnt affected voltage understand electric motors expect result same constant load can calculate 1 The four-cell pack will last 600/240 hours end point 44 VDC 2 The five-cell pack will last 600/260 hours end point 55 VDC ie 11 VDC per cell case doing same work four-cell pack lasts longer Ill bet didnt expect Another factor hidden Higher THE AMERICAN MADE RJL K61 metal multi mix carburetor o-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened l Crankshaft New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Aerospace Quality Invesmient Cast Crankcase Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price just think dont have send Dollars out country obtain Quality expect Priced just few Dollars cheapies below quality competition American Made K61 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 voltages cause hotter sparks will burn away motor brushes faster look brushes servo motors usually find tiny wires crossed cylindrical commutator segments As such make point contact ability dissipate heat very limited five-cell pack will wear out servo motors faster fourcell pack Given disadvantages would anyone choose use five-cell pack common reason get work out smaller servos case electric Whisper Helicopter other electric-powered airplanes trade servo weight propulsion battery weightE responding advertisers mention read about ModelAviation S-2F/WuIf Continued page 54 Cut out stabilizer elevators stiff 4-in balsa sheet Trim gap between parts provide 4e-in clearance after hinging Sand exposed edges hinge lines round profile Cut hinge slots install hinges used Sigs Easy Hinges Cut stabilizer along centerline bevel halves set dihedral As did wing pin stabilizer half board block up other half 1 Epoxy halves together Add fiberglass reinforcement glue joint has set Cut out rudder /6 soft balsa sheet Sand generous airfoil section Continued page 150 WRITE Foe LOG eC-COMBAT PUN-FLYCL-SLUItCL-COMBATFF-IILGA-A CASP-3 January 1992 147 Dual Ball Bearings Modelers choke GMP EPOXIES High Quality Model Construction Jr Kwik Set 6 minute5 oz $ 695 Kwik Set Set Minute10 oz $1095 Giant Quick Set 6 Minute16 oz $1495 Notso Quick 20 Minute10 oz $ 995 OMP AIRCRAFT INSTRUMENTS SOin3/161/4318 1/2$ 179 40in3/4sndoneinch$ 179 EASY OFF PULLER proper tool removing drive wesheessnd flywheels $ 796 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 dealer call 513-385-7398 order direct add $150 postage COHPETETION AIRFRAHESPLY 4OOC S GENESI P 0 nox NVILLE IN 4743e~ en ees 372 PFA Her, SKI CROLEWINSES S WIzAND TOP TEN 0 S CRMPION RITEC POW FL AINPRANE KEVOLAS KOON & OKAN 1 OPS TAO lOtORUER 255e FLAPS S0 CONPOrEK/NIX EXPEKIENCED PILOTS & BLOEKS ONLYPLEASK ENO30 to40 CHEAP SENSATION KEVOLAS BOOMX32 $599 ea CLCOMBAT STAG OXSLO OBLKlTtfoauys 24t $29 REVOLAS LG3/exe2pc4$799pr CLProtile STONTtFoauySpan 4RPatern HasterSr$29 HvyDutyREVGLAS LG e$1O99pr RCCONBATINPERIAL WARRIOR4045tfoamy $49 40 size SCCombat prop $l99 RCCONBATTAILcAToetwoodyObl kiLt23ChELRVONS$35 FOXOERO RACING PROP $199 CLStunt/SPORT IAO9AMERICAN BOY BLTop PROFILE $t5 AERIAL MODEL AIRCRAPT PRODUCTS AMAP cutter boi 2 13 965-9504I AMAP power supply Anodized available Add $17900 $4900 $1000 FLAIR SLOPE Fuselage $6000 Three-piece fuse P tailor V tail also sell cut cores available airfoils MI-142 MH43 MH62 MH64 7003 RGI5 RG14A Foam cores $5000 n s3omFull Money-Back 30 sasmGuarantee& 50 $4510 FLAIR-SLOPE 11/SPORT ELECTRIC Complete $6000 Length 43 h 3 ht 340 & 60 Size Motor Recomnwnded Slip-on Nose Cone Fuselage made EZ LamEpoxy Blue Foam 2 lb Density 24 X 96 X 2 $29 00 Aerospace composite Products Will cut shipping 12 X 48 please specify Bob Ratzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 171/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 S-2F/Wu Continued page 147 full-scale S-2F has two hinge lines long trim hinge rudder cut rudder second stepped hinge line glued % rudder offset amount offset encourages model turn right against its flying circle providing necessary line tension windy conditions fly Its especially helpful engines running Engine pods twin pods identical except landing gear struts mounts Beginning center crutch cut out parts pairs center crutch should basically match side view nacelle minus thicknesses firewall sheeting Cut out N-4 pieces glue both sides crutch Glue firewall N-2 N-3 side Add wing platform Install landing gear its plywood anchors bracing gear well Plank nacelles Select pieces ain balsa inch wide eight inches long making sure wood grain runs lengthwise Soak pieces hot water hour two make pliable Wipe off excess water fit roughly over nacelles Bind assembly Ace bandage strips cloth pieces dry bend trim accurate fit over nacelles Glue planking place Cap nacelles % sheet joining wing Test fit nacelles wing somewhat complicated wing dihedral angle bend landing gear strut give nacelles desired appearance Fuselage Cut out sides medium -in balsa sheet Shape nose block band saw jigsaw Cut out formers mark locations both sides Glue nose block sides Working front rear add formers F-4 Position assembly over plan top view Pull tail together making sure sides meet centerline Attach tail post quick-setting glue add remaining formers Sheet fuselage bottom % balsa making certain wood grain runs crosswise Drill hole nose gear dowel Make nose gear /i6 music wire Bind solder axle securely strut Bend over top strut bind hardwood dowel shown install hole nose block Check axle straight otherwise model will try taxi center circle Pin wing assembly place top fuselage Trim openings fuselage formers clear pushrod wing Mount two nylon horns elevator bottoms Pin stabilizer place rear fuselage Sight assembly front rear trimming necessary accurate alignment wing stabilizer fuselage Bend up install twin elevator pushrods Cut exit slots pushrods both sides fuselage bend rods bit assure move freely link up main pushrod Adjust slots wires achieve good i/4 up down elevator travel youre satisfied bind three pushrods copper wire solder securely Glue wing stabilizer fuselage CyA cyanoacrylate glue glue has set fillet joints epoxy top block gives S-2F its 150 Model Aviation WOODWORKING MACHINERY 7 POWERMATIC 562-3538 aleo have CATA LOG $100woodworking PO Box 536-Y icane WV 0 25526 WWII AIRCRAFT SCALE DRAWINGS & SPECIFICATION SHEETS Over 200 $300 Sc,e 3 Vev.Fo CtIog 0rvgsRANGER FIBERGLASS RANGER FIBERGLASS CO has been Box 879 speciahzing custom desgn moldngCampton NH aerospace industry since 7959 03223 distinctive look Use lightweight 34-in balsa sheet available laminate block thinner sheets Rough cut block shape fit wing help achieve accurate fit cut template rib W-2 include allowance leading trailing edges top sheeting rudder/stabilizer juncture carve top block fair rudder stabilizer shelf Its worth effort achieve correct appearance Carve top block final shape Remove hollow block glue back Mount nacelles wings Accurately measure distance fuselage side centerline nacelle Pin nacelles place check alignment Glue nacelles good-quality slow-drying epoxy Mix up some epoxy filler using microballoons favorite commercial brand Both reinforcement appearance sake make small epoxy fillet major component joints fillets have set sand entire model well Fill dents pinholes sand structure final time engine cowlings determined models size cowlings shown plan about size aluminum soda pop can Use cans rounded bottoms angled base look wrong might have wander sparkling water section grocer find right type Before cutting cans apart sand well 600-grit paper remove original paint roughen surface new paint will adhere Cut out can bottom punch hole large enough allow finish job tin snips carefulthe cans made very thin metal have extremely sharp edges Cut cowls length Snip short cuts rear cowl edge make cooling air exit flaps Finishing final assembly Finishing personal matter Since replicating all-metal aircraft however finish must smooth clean used seven coats clear dope seal wood pores achieve good gloss followed several light coats gloss white automotive acrylic enamel applied spray gun allowed three days paint cure added trim colors Neon colors widely available day-gb orange paint appropriate firebomber easy find painted glare panels windows flat black fashioned panel lines control outlines trim tape Add wheels landing gear doors used /32 styrene local railroad model shop doors gloss white plastic requires no paint cutting doors shape include tabs can ilL FL Y WHA T FIX Special Fast Turnaround Now Available CALL uency Conversion $4000 udes Crystals Certification Call Today Ultra Narrow BandAMR Model KMRDC4-7A Years developing bul worth wait Features Dual conversion AGC Dual Crystal Ceramic Filters 50 53 72 75 Mhz Connectors Kraft styles Deans World & specials Specifications Size 275 70mm x 165 415mm x 825 205mm Weight 165 oz Working Voltage 38 -60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1- 85 khz 60db down 301P 3db Image 60db down Service ACe Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals 4- 6 Meter Specials Send Self Addressed Envelope Brochures UPS US Mail Federal Express 000 Shipping Charges Extra Mastercard Visa Accepted Kraft Midwest Inc RADIO115 E Main Northville MI 48167 313 348-0085 FAX 313 348-4175 pressed balsa sheeting anchored glue Mount engines oriented twin 049s cylinders facing downward needle valves facing upward Add fuel tube extensions easier fueling File slot screwdriver top needle valve screwdriver can inserted through hole cowl its time adjust valve Fasten both cowls firewalls short wood screws Mount propellers Balance model center-ofgravity shown plan prototype needed no ballast airplane tail-heavy add lead nose gear strut its nose-heavy try live nose-heavy craft will stable flight Flying Test run engines set needle valves Purchase set steel control lines control handle substantial construction Light-duty nylon lines plastic control handles neither strong enough nor safe enough twin-engine models Head flying field friend get set have fun Theres no mistaking sound two engines sync Keep em flyingD January 1992 151 RCD AM & FM 7 Channel Receiver Special exclusive 6 meters -$7995 TX conversion availablel Full 1991 Specsl Rx alone 72175 mhz-$6995 OrderModel RODiCO Futabla G AM$6995 Model RCO15O Futabla J AM$6995 Model RCO200 Futabla J FM$6995 Model RCD300 Airtronic AM$6995 Model RCD15OKB Kratt K-Line B$6995 Model R0D150JR JR AM$6995 Model RODi 50TH Tower 500$6995 Match tuned Gold 1991 Tx$7495 Tuned aligned updating Tx$7995 Tuned aligned Tx frequency change . $8995 List Prices Exceeds AMA Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Line Units add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1992/01
Page Numbers: 52, 53, 54, 147, 150, 151
GRUMMAN introduced S-2F Tracker little fanfare shortly after World War II Among least known great Grumman aircraft have seen considerable action worlds navies S-2F nevertheless remains service today fact United States Canada have adapted airplane use firebomber As Control Line Scale model firebomber version S-2F probably unique Two experiences motivated build movie Always its hauntingly accurate portrait firebombers highly explosive environment Fire Eater 7 Inspired boyhood memo ries borate bombers movie Al ways Will twin 0496 soon humming flying field too Updated firebomber Control Line Scale twin-049 model lesser-known Grumman design guaranteed turn heads flying field EAllen WuIf 7 4 LUW4 1 RACKER ne aunor IS ssicier Tar auineniic aelal, aown ins airorusnea exnauss sireaKs authors CL Scale original profile view Dubbed Fire Eater 7 model realistic appearance yet easy build An ingenious drop mechanism ejects red tempera powder borate firebomber role no figment authors imagination reflects actual use S-2F United States Canada todaythough Japan Grumman design used coastal patrol craft Full-Size Plans Available Page 188 41 RIWIT EBUWV450 LL1/irsHi iTIP WAGHTva piy maI/B lIARS SEABLICOW a BOTTOMtRACKS MAKE 2 ECKVAIORB ii I IIIIIIII IiIIIIIIII ~-ti-wMOEsIT4II -111-ZIjW-31W-41 W4IWa IIA-ei- Iiw.w1w. IiIIi F 3SBT ARIE LOCATAMS V4U TI TAS hEFTF iax I/4 A/ARElatEALUM POP CAR- COWL IARWITWIB -I/32 lEA LEASOUTSaSONWA/Ioowas soEws2 PLACUlrsHE ABet PLAII z-B~414 CRUTCH 1111 IIII iiii IIii II, 34 OH EG TIP WRAP JOINT A/GLASS TAMIHRAP A/WAU 5 CLOTH A-7~ Bias FROM __EXCEPT AI MARE IS/S25llT TSP MARE ZEACHIF Wa F IPZF4 IN-IN-Sa-s -IAB WIT PLELPILL 1JBE5 WITH HASA I55049 BLACK MEOW posonoa B-A MARE 4 SF I/B SHT I1/1K MA ____________FORK LLERIMWLaS 5/35 WIT LU - F-5FR BALANCE PT ~I/3S5TTRERE7 EAR DOORS BLOCK NOSE }TZ WRAPII DOWELF-IpS ~WU62F Tiacker BALLEN BSLF B sOLDERU5545B9919Ij fly took back summer 10 hot afternoon Id watch excitedly B-17s B-26s PBY-4Ys fueled up filled thick red borate taxied end runway Seeing hearing feeling big machines rumbled staggered air real thrill article Air & Space magazine learned about contemporary usage Grumman S-2F firebomber suppose diminishing supply WW II bombers made inevitable yet never thought S-2F potential attack plane strictly submarine hunter equipped supply sonar buoys little else hadnt imagined carrying torpedoes well An yet undiscovered Control Line Scale subject can difficult find days Looking through some plan catalogs found ordered CL version the S-2F built 1970s plan revealed faithful Scale model Navy version just bit smaller conceptualized twin-engine /2A firebomber version would update model make unique Weve seen cropdusters dust military bombers drop bombseven Japanese bomber launched kamikaze glider borate drop would take some doing wouldnt neat test idea first revived two dormant 049 engines slipped balsa bed shaped like S-2F Making borate next challenge Everything tried red mud red paint either thinned out invisibility fell emerged big glop solution cameas flashes creativity often meduring course bath Pouring Mr Bubble powder childs bath suddenly realized powder would perfect borate would look authentic bomb bay wouldnt have made watertight Red tempera powder looks exactly right slipstream sculpts resemble real borate flows out model Twin-engine hA models great fun invite experimentation yet inexpensive quick build Squadron/Signal Publications Inc offers excellent volume S-2F Tracker book includes color views January 1992 53 Bottom-up view S-2F showing clean-lined looks wheel well doors openings military civilian versions configurations markings offers bit information about Turbo-Tracker now being built Canada United States could miniaturize Turbo-Tracker different look entirely too borate bomber doesnt catch fancy could go torpedo sonar-buoy drop forget about drop sort simply make fun flier Construction Select test engines before building success twin-engine model begins engines reliable matched must able start engines quickly easily power output should approximately equal Control Line models however skewing power output slightly favor inboard engine advantage outboard engine quits slightly powerful inboard will help keep lines taut borate drop mechanism too complicated ready illustration omitted plan Basically mechanism involves set doors spring loaded close rubberbands pair spring-loaded cams rams doors open cams tripped pulling third lead-out system took lot monkeying works may well come up simpler setup make working model drop mechanism before building fuselage Youll need adjust fuselage construction accommodate particular system Wing Begin making inboard left panel Trim sheet A6 x 4-in balsa fit between leading trailing edges LE TE Pin balsa sheet LE TE over plan Glue ribs except W-l place Install bellcrank its mount String lead-outs through inboard wing Make basic pushrod 1/16 music wire pushrod should extend good eight inches beyond trailing edge point will joined rear twin pushrods after wing has installed glue has set remove inboard wing building board position over plan Build right panel directly atop left Pin down leading trailing edges taking care glue mating leading trailing edges opposite wing Glue ribs W-2 through W- 11 wing tip weight Cut out two plywood dihedral joiners fit center section make small balsa wedges achieve accurate fit Carefully cut two wing panels apart Sand bevel dihedral angle Pin panel building board block up other 1 Epoxy panels together Install dihedral joiners W-l Add top wing spar Lift wing off board dihedral joint has set plank top surface 1A6 sheet Add wing tip blocks Drill lead-out holes install bushings left tip Carve leading edges wing tips shape Sand entire wing thoroughly Coat center section epoxy reinforce center joint lightweight fiberglass cloth Tail surfaces high-placed stabilizer dihedral presents couple challenges assembling tail done little differently usual Continued page 147 54 Model Aviation IIC 0ItJIJft@ catiy U. limits takeofib iu dirt paved . aci - engine soda pop cans ruggea ana realislic Plenty cooling air enters through open fronts exit flaps direct air over wing Contrarotating props came dusty box local hobby shop twin elevator horns less compli cated appear hardest part getting pushrods out fit Goldberg nylon Snap R Keepers make easier work assembly adjusting lead-outs made lightweight ca ble exit through thin nylon tubes third line part bomb bay mecha nism Pulling lead-out trips pair spring-loaded cams connected ramming bomb bay doors open BRAIN TEASER FOUR CELLS OR FIVE friend asked What effect using five-cell Ni-Cd pack place fout-cell pack Isnt voltage same four alkaline dry cells arent radios designed work way Shouldnt get operating time five-cell pack Let make important point cell has two ends make contact circuit Assuming four cells flight pack eight places pack poor spring contact can destroy plane Thats Ni-Cd flight packs welded together Lets look test data measured airplanes has Futaba receiver four regular servos Idle current four-cell pack A Idle current five-cell pack A Same setup two servos loaded 30 -oz about mum torque lead sinkers Four-cell pack mA Five-cell pack mA First notice five-cell pack delivers extra 20 mA both unloaded idle loaded conditions important fact increase battery pack voltage increase idle current increase applies time system Second notice current drawn servo under constant mechanical load stalled isnt affected voltage understand electric motors expect result same constant load can calculate 1 The four-cell pack will last 600/240 hours end point 44 VDC 2 The five-cell pack will last 600/260 hours end point 55 VDC ie 11 VDC per cell case doing same work four-cell pack lasts longer Ill bet didnt expect Another factor hidden Higher THE AMERICAN MADE RJL K61 metal multi mix carburetor o-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened l Crankshaft New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Aerospace Quality Invesmient Cast Crankcase Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price just think dont have send Dollars out country obtain Quality expect Priced just few Dollars cheapies below quality competition American Made K61 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 voltages cause hotter sparks will burn away motor brushes faster look brushes servo motors usually find tiny wires crossed cylindrical commutator segments As such make point contact ability dissipate heat very limited five-cell pack will wear out servo motors faster fourcell pack Given disadvantages would anyone choose use five-cell pack common reason get work out smaller servos case electric Whisper Helicopter other electric-powered airplanes trade servo weight propulsion battery weightE responding advertisers mention read about ModelAviation S-2F/WuIf Continued page 54 Cut out stabilizer elevators stiff 4-in balsa sheet Trim gap between parts provide 4e-in clearance after hinging Sand exposed edges hinge lines round profile Cut hinge slots install hinges used Sigs Easy Hinges Cut stabilizer along centerline bevel halves set dihedral As did wing pin stabilizer half board block up other half 1 Epoxy halves together Add fiberglass reinforcement glue joint has set Cut out rudder /6 soft balsa sheet Sand generous airfoil section Continued page 150 WRITE Foe LOG eC-COMBAT PUN-FLYCL-SLUItCL-COMBATFF-IILGA-A CASP-3 January 1992 147 Dual Ball Bearings Modelers choke GMP EPOXIES High Quality Model Construction Jr Kwik Set 6 minute5 oz $ 695 Kwik Set Set Minute10 oz $1095 Giant Quick Set 6 Minute16 oz $1495 Notso Quick 20 Minute10 oz $ 995 OMP AIRCRAFT INSTRUMENTS SOin3/161/4318 1/2$ 179 40in3/4sndoneinch$ 179 EASY OFF PULLER proper tool removing drive wesheessnd flywheels $ 796 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 dealer call 513-385-7398 order direct add $150 postage COHPETETION AIRFRAHESPLY 4OOC S GENESI P 0 nox NVILLE IN 4743e~ en ees 372 PFA Her, SKI CROLEWINSES S WIzAND TOP TEN 0 S CRMPION RITEC POW FL AINPRANE KEVOLAS KOON & OKAN 1 OPS TAO lOtORUER 255e FLAPS S0 CONPOrEK/NIX EXPEKIENCED PILOTS & BLOEKS ONLYPLEASK ENO30 to40 CHEAP SENSATION KEVOLAS BOOMX32 $599 ea CLCOMBAT STAG OXSLO OBLKlTtfoauys 24t $29 REVOLAS LG3/exe2pc4$799pr CLProtile STONTtFoauySpan 4RPatern HasterSr$29 HvyDutyREVGLAS LG e$1O99pr RCCONBATINPERIAL WARRIOR4045tfoamy $49 40 size SCCombat prop $l99 RCCONBATTAILcAToetwoodyObl kiLt23ChELRVONS$35 FOXOERO RACING PROP $199 CLStunt/SPORT IAO9AMERICAN BOY BLTop PROFILE $t5 AERIAL MODEL AIRCRAPT PRODUCTS AMAP cutter boi 2 13 965-9504I AMAP power supply Anodized available Add $17900 $4900 $1000 FLAIR SLOPE Fuselage $6000 Three-piece fuse P tailor V tail also sell cut cores available airfoils MI-142 MH43 MH62 MH64 7003 RGI5 RG14A Foam cores $5000 n s3omFull Money-Back 30 sasmGuarantee& 50 $4510 FLAIR-SLOPE 11/SPORT ELECTRIC Complete $6000 Length 43 h 3 ht 340 & 60 Size Motor Recomnwnded Slip-on Nose Cone Fuselage made EZ LamEpoxy Blue Foam 2 lb Density 24 X 96 X 2 $29 00 Aerospace composite Products Will cut shipping 12 X 48 please specify Bob Ratzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 171/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 S-2F/Wu Continued page 147 full-scale S-2F has two hinge lines long trim hinge rudder cut rudder second stepped hinge line glued % rudder offset amount offset encourages model turn right against its flying circle providing necessary line tension windy conditions fly Its especially helpful engines running Engine pods twin pods identical except landing gear struts mounts Beginning center crutch cut out parts pairs center crutch should basically match side view nacelle minus thicknesses firewall sheeting Cut out N-4 pieces glue both sides crutch Glue firewall N-2 N-3 side Add wing platform Install landing gear its plywood anchors bracing gear well Plank nacelles Select pieces ain balsa inch wide eight inches long making sure wood grain runs lengthwise Soak pieces hot water hour two make pliable Wipe off excess water fit roughly over nacelles Bind assembly Ace bandage strips cloth pieces dry bend trim accurate fit over nacelles Glue planking place Cap nacelles % sheet joining wing Test fit nacelles wing somewhat complicated wing dihedral angle bend landing gear strut give nacelles desired appearance Fuselage Cut out sides medium -in balsa sheet Shape nose block band saw jigsaw Cut out formers mark locations both sides Glue nose block sides Working front rear add formers F-4 Position assembly over plan top view Pull tail together making sure sides meet centerline Attach tail post quick-setting glue add remaining formers Sheet fuselage bottom % balsa making certain wood grain runs crosswise Drill hole nose gear dowel Make nose gear /i6 music wire Bind solder axle securely strut Bend over top strut bind hardwood dowel shown install hole nose block Check axle straight otherwise model will try taxi center circle Pin wing assembly place top fuselage Trim openings fuselage formers clear pushrod wing Mount two nylon horns elevator bottoms Pin stabilizer place rear fuselage Sight assembly front rear trimming necessary accurate alignment wing stabilizer fuselage Bend up install twin elevator pushrods Cut exit slots pushrods both sides fuselage bend rods bit assure move freely link up main pushrod Adjust slots wires achieve good i/4 up down elevator travel youre satisfied bind three pushrods copper wire solder securely Glue wing stabilizer fuselage CyA cyanoacrylate glue glue has set fillet joints epoxy top block gives S-2F its 150 Model Aviation WOODWORKING MACHINERY 7 POWERMATIC 562-3538 aleo have CATA LOG $100woodworking PO Box 536-Y icane WV 0 25526 WWII AIRCRAFT SCALE DRAWINGS & SPECIFICATION SHEETS Over 200 $300 Sc,e 3 Vev.Fo CtIog 0rvgsRANGER FIBERGLASS RANGER FIBERGLASS CO has been Box 879 speciahzing custom desgn moldngCampton NH aerospace industry since 7959 03223 distinctive look Use lightweight 34-in balsa sheet available laminate block thinner sheets Rough cut block shape fit wing help achieve accurate fit cut template rib W-2 include allowance leading trailing edges top sheeting rudder/stabilizer juncture carve top block fair rudder stabilizer shelf Its worth effort achieve correct appearance Carve top block final shape Remove hollow block glue back Mount nacelles wings Accurately measure distance fuselage side centerline nacelle Pin nacelles place check alignment Glue nacelles good-quality slow-drying epoxy Mix up some epoxy filler using microballoons favorite commercial brand Both reinforcement appearance sake make small epoxy fillet major component joints fillets have set sand entire model well Fill dents pinholes sand structure final time engine cowlings determined models size cowlings shown plan about size aluminum soda pop can Use cans rounded bottoms angled base look wrong might have wander sparkling water section grocer find right type Before cutting cans apart sand well 600-grit paper remove original paint roughen surface new paint will adhere Cut out can bottom punch hole large enough allow finish job tin snips carefulthe cans made very thin metal have extremely sharp edges Cut cowls length Snip short cuts rear cowl edge make cooling air exit flaps Finishing final assembly Finishing personal matter Since replicating all-metal aircraft however finish must smooth clean used seven coats clear dope seal wood pores achieve good gloss followed several light coats gloss white automotive acrylic enamel applied spray gun allowed three days paint cure added trim colors Neon colors widely available day-gb orange paint appropriate firebomber easy find painted glare panels windows flat black fashioned panel lines control outlines trim tape Add wheels landing gear doors used /32 styrene local railroad model shop doors gloss white plastic requires no paint cutting doors shape include tabs can ilL FL Y WHA T FIX Special Fast Turnaround Now Available CALL uency Conversion $4000 udes Crystals Certification Call Today Ultra Narrow BandAMR Model KMRDC4-7A Years developing bul worth wait Features Dual conversion AGC Dual Crystal Ceramic Filters 50 53 72 75 Mhz Connectors Kraft styles Deans World & specials Specifications Size 275 70mm x 165 415mm x 825 205mm Weight 165 oz Working Voltage 38 -60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1- 85 khz 60db down 301P 3db Image 60db down Service ACe Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals 4- 6 Meter Specials Send Self Addressed Envelope Brochures UPS US Mail Federal Express 000 Shipping Charges Extra Mastercard Visa Accepted Kraft Midwest Inc RADIO115 E Main Northville MI 48167 313 348-0085 FAX 313 348-4175 pressed balsa sheeting anchored glue Mount engines oriented twin 049s cylinders facing downward needle valves facing upward Add fuel tube extensions easier fueling File slot screwdriver top needle valve screwdriver can inserted through hole cowl its time adjust valve Fasten both cowls firewalls short wood screws Mount propellers Balance model center-ofgravity shown plan prototype needed no ballast airplane tail-heavy add lead nose gear strut its nose-heavy try live nose-heavy craft will stable flight Flying Test run engines set needle valves Purchase set steel control lines control handle substantial construction Light-duty nylon lines plastic control handles neither strong enough nor safe enough twin-engine models Head flying field friend get set have fun Theres no mistaking sound two engines sync Keep em flyingD January 1992 151 RCD AM & FM 7 Channel Receiver Special exclusive 6 meters -$7995 TX conversion availablel Full 1991 Specsl Rx alone 72175 mhz-$6995 OrderModel RODiCO Futabla G AM$6995 Model RCO15O Futabla J AM$6995 Model RCO200 Futabla J FM$6995 Model RCD300 Airtronic AM$6995 Model RCD15OKB Kratt K-Line B$6995 Model R0D150JR JR AM$6995 Model RODi 50TH Tower 500$6995 Match tuned Gold 1991 Tx$7495 Tuned aligned updating Tx$7995 Tuned aligned Tx frequency change . $8995 List Prices Exceeds AMA Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Line Units add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1992/01
Page Numbers: 52, 53, 54, 147, 150, 151
GRUMMAN introduced S-2F Tracker little fanfare shortly after World War II Among least known great Grumman aircraft have seen considerable action worlds navies S-2F nevertheless remains service today fact United States Canada have adapted airplane use firebomber As Control Line Scale model firebomber version S-2F probably unique Two experiences motivated build movie Always its hauntingly accurate portrait firebombers highly explosive environment Fire Eater 7 Inspired boyhood memo ries borate bombers movie Al ways Will twin 0496 soon humming flying field too Updated firebomber Control Line Scale twin-049 model lesser-known Grumman design guaranteed turn heads flying field EAllen WuIf 7 4 LUW4 1 RACKER ne aunor IS ssicier Tar auineniic aelal, aown ins airorusnea exnauss sireaKs authors CL Scale original profile view Dubbed Fire Eater 7 model realistic appearance yet easy build An ingenious drop mechanism ejects red tempera powder borate firebomber role no figment authors imagination reflects actual use S-2F United States Canada todaythough Japan Grumman design used coastal patrol craft Full-Size Plans Available Page 188 41 RIWIT EBUWV450 LL1/irsHi iTIP WAGHTva piy maI/B lIARS SEABLICOW a BOTTOMtRACKS MAKE 2 ECKVAIORB ii I IIIIIIII IiIIIIIIII ~-ti-wMOEsIT4II -111-ZIjW-31W-41 W4IWa IIA-ei- Iiw.w1w. IiIIi F 3SBT ARIE LOCATAMS V4U TI TAS hEFTF iax I/4 A/ARElatEALUM POP CAR- COWL IARWITWIB -I/32 lEA LEASOUTSaSONWA/Ioowas soEws2 PLACUlrsHE ABet PLAII z-B~414 CRUTCH 1111 IIII iiii IIii II, 34 OH EG TIP WRAP JOINT A/GLASS TAMIHRAP A/WAU 5 CLOTH A-7~ Bias FROM __EXCEPT AI MARE IS/S25llT TSP MARE ZEACHIF Wa F IPZF4 IN-IN-Sa-s -IAB WIT PLELPILL 1JBE5 WITH HASA I55049 BLACK MEOW posonoa B-A MARE 4 SF I/B SHT I1/1K MA ____________FORK LLERIMWLaS 5/35 WIT LU - F-5FR BALANCE PT ~I/3S5TTRERE7 EAR DOORS BLOCK NOSE }TZ WRAPII DOWELF-IpS ~WU62F Tiacker BALLEN BSLF B sOLDERU5545B9919Ij fly took back summer 10 hot afternoon Id watch excitedly B-17s B-26s PBY-4Ys fueled up filled thick red borate taxied end runway Seeing hearing feeling big machines rumbled staggered air real thrill article Air & Space magazine learned about contemporary usage Grumman S-2F firebomber suppose diminishing supply WW II bombers made inevitable yet never thought S-2F potential attack plane strictly submarine hunter equipped supply sonar buoys little else hadnt imagined carrying torpedoes well An yet undiscovered Control Line Scale subject can difficult find days Looking through some plan catalogs found ordered CL version the S-2F built 1970s plan revealed faithful Scale model Navy version just bit smaller conceptualized twin-engine /2A firebomber version would update model make unique Weve seen cropdusters dust military bombers drop bombseven Japanese bomber launched kamikaze glider borate drop would take some doing wouldnt neat test idea first revived two dormant 049 engines slipped balsa bed shaped like S-2F Making borate next challenge Everything tried red mud red paint either thinned out invisibility fell emerged big glop solution cameas flashes creativity often meduring course bath Pouring Mr Bubble powder childs bath suddenly realized powder would perfect borate would look authentic bomb bay wouldnt have made watertight Red tempera powder looks exactly right slipstream sculpts resemble real borate flows out model Twin-engine hA models great fun invite experimentation yet inexpensive quick build Squadron/Signal Publications Inc offers excellent volume S-2F Tracker book includes color views January 1992 53 Bottom-up view S-2F showing clean-lined looks wheel well doors openings military civilian versions configurations markings offers bit information about Turbo-Tracker now being built Canada United States could miniaturize Turbo-Tracker different look entirely too borate bomber doesnt catch fancy could go torpedo sonar-buoy drop forget about drop sort simply make fun flier Construction Select test engines before building success twin-engine model begins engines reliable matched must able start engines quickly easily power output should approximately equal Control Line models however skewing power output slightly favor inboard engine advantage outboard engine quits slightly powerful inboard will help keep lines taut borate drop mechanism too complicated ready illustration omitted plan Basically mechanism involves set doors spring loaded close rubberbands pair spring-loaded cams rams doors open cams tripped pulling third lead-out system took lot monkeying works may well come up simpler setup make working model drop mechanism before building fuselage Youll need adjust fuselage construction accommodate particular system Wing Begin making inboard left panel Trim sheet A6 x 4-in balsa fit between leading trailing edges LE TE Pin balsa sheet LE TE over plan Glue ribs except W-l place Install bellcrank its mount String lead-outs through inboard wing Make basic pushrod 1/16 music wire pushrod should extend good eight inches beyond trailing edge point will joined rear twin pushrods after wing has installed glue has set remove inboard wing building board position over plan Build right panel directly atop left Pin down leading trailing edges taking care glue mating leading trailing edges opposite wing Glue ribs W-2 through W- 11 wing tip weight Cut out two plywood dihedral joiners fit center section make small balsa wedges achieve accurate fit Carefully cut two wing panels apart Sand bevel dihedral angle Pin panel building board block up other 1 Epoxy panels together Install dihedral joiners W-l Add top wing spar Lift wing off board dihedral joint has set plank top surface 1A6 sheet Add wing tip blocks Drill lead-out holes install bushings left tip Carve leading edges wing tips shape Sand entire wing thoroughly Coat center section epoxy reinforce center joint lightweight fiberglass cloth Tail surfaces high-placed stabilizer dihedral presents couple challenges assembling tail done little differently usual Continued page 147 54 Model Aviation IIC 0ItJIJft@ catiy U. limits takeofib iu dirt paved . aci - engine soda pop cans ruggea ana realislic Plenty cooling air enters through open fronts exit flaps direct air over wing Contrarotating props came dusty box local hobby shop twin elevator horns less compli cated appear hardest part getting pushrods out fit Goldberg nylon Snap R Keepers make easier work assembly adjusting lead-outs made lightweight ca ble exit through thin nylon tubes third line part bomb bay mecha nism Pulling lead-out trips pair spring-loaded cams connected ramming bomb bay doors open BRAIN TEASER FOUR CELLS OR FIVE friend asked What effect using five-cell Ni-Cd pack place fout-cell pack Isnt voltage same four alkaline dry cells arent radios designed work way Shouldnt get operating time five-cell pack Let make important point cell has two ends make contact circuit Assuming four cells flight pack eight places pack poor spring contact can destroy plane Thats Ni-Cd flight packs welded together Lets look test data measured airplanes has Futaba receiver four regular servos Idle current four-cell pack A Idle current five-cell pack A Same setup two servos loaded 30 -oz about mum torque lead sinkers Four-cell pack mA Five-cell pack mA First notice five-cell pack delivers extra 20 mA both unloaded idle loaded conditions important fact increase battery pack voltage increase idle current increase applies time system Second notice current drawn servo under constant mechanical load stalled isnt affected voltage understand electric motors expect result same constant load can calculate 1 The four-cell pack will last 600/240 hours end point 44 VDC 2 The five-cell pack will last 600/260 hours end point 55 VDC ie 11 VDC per cell case doing same work four-cell pack lasts longer Ill bet didnt expect Another factor hidden Higher THE AMERICAN MADE RJL K61 metal multi mix carburetor o-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened l Crankshaft New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Aerospace Quality Invesmient Cast Crankcase Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price just think dont have send Dollars out country obtain Quality expect Priced just few Dollars cheapies below quality competition American Made K61 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 voltages cause hotter sparks will burn away motor brushes faster look brushes servo motors usually find tiny wires crossed cylindrical commutator segments As such make point contact ability dissipate heat very limited five-cell pack will wear out servo motors faster fourcell pack Given disadvantages would anyone choose use five-cell pack common reason get work out smaller servos case electric Whisper Helicopter other electric-powered airplanes trade servo weight propulsion battery weightE responding advertisers mention read about ModelAviation S-2F/WuIf Continued page 54 Cut out stabilizer elevators stiff 4-in balsa sheet Trim gap between parts provide 4e-in clearance after hinging Sand exposed edges hinge lines round profile Cut hinge slots install hinges used Sigs Easy Hinges Cut stabilizer along centerline bevel halves set dihedral As did wing pin stabilizer half board block up other half 1 Epoxy halves together Add fiberglass reinforcement glue joint has set Cut out rudder /6 soft balsa sheet Sand generous airfoil section Continued page 150 WRITE Foe LOG eC-COMBAT PUN-FLYCL-SLUItCL-COMBATFF-IILGA-A CASP-3 January 1992 147 Dual Ball Bearings Modelers choke GMP EPOXIES High Quality Model Construction Jr Kwik Set 6 minute5 oz $ 695 Kwik Set Set Minute10 oz $1095 Giant Quick Set 6 Minute16 oz $1495 Notso Quick 20 Minute10 oz $ 995 OMP AIRCRAFT INSTRUMENTS SOin3/161/4318 1/2$ 179 40in3/4sndoneinch$ 179 EASY OFF PULLER proper tool removing drive wesheessnd flywheels $ 796 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 dealer call 513-385-7398 order direct add $150 postage COHPETETION AIRFRAHESPLY 4OOC S GENESI P 0 nox NVILLE IN 4743e~ en ees 372 PFA Her, SKI CROLEWINSES S WIzAND TOP TEN 0 S CRMPION RITEC POW FL AINPRANE KEVOLAS KOON & OKAN 1 OPS TAO lOtORUER 255e FLAPS S0 CONPOrEK/NIX EXPEKIENCED PILOTS & BLOEKS ONLYPLEASK ENO30 to40 CHEAP SENSATION KEVOLAS BOOMX32 $599 ea CLCOMBAT STAG OXSLO OBLKlTtfoauys 24t $29 REVOLAS LG3/exe2pc4$799pr CLProtile STONTtFoauySpan 4RPatern HasterSr$29 HvyDutyREVGLAS LG e$1O99pr RCCONBATINPERIAL WARRIOR4045tfoamy $49 40 size SCCombat prop $l99 RCCONBATTAILcAToetwoodyObl kiLt23ChELRVONS$35 FOXOERO RACING PROP $199 CLStunt/SPORT IAO9AMERICAN BOY BLTop PROFILE $t5 AERIAL MODEL AIRCRAPT PRODUCTS AMAP cutter boi 2 13 965-9504I AMAP power supply Anodized available Add $17900 $4900 $1000 FLAIR SLOPE Fuselage $6000 Three-piece fuse P tailor V tail also sell cut cores available airfoils MI-142 MH43 MH62 MH64 7003 RGI5 RG14A Foam cores $5000 n s3omFull Money-Back 30 sasmGuarantee& 50 $4510 FLAIR-SLOPE 11/SPORT ELECTRIC Complete $6000 Length 43 h 3 ht 340 & 60 Size Motor Recomnwnded Slip-on Nose Cone Fuselage made EZ LamEpoxy Blue Foam 2 lb Density 24 X 96 X 2 $29 00 Aerospace composite Products Will cut shipping 12 X 48 please specify Bob Ratzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 171/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 S-2F/Wu Continued page 147 full-scale S-2F has two hinge lines long trim hinge rudder cut rudder second stepped hinge line glued % rudder offset amount offset encourages model turn right against its flying circle providing necessary line tension windy conditions fly Its especially helpful engines running Engine pods twin pods identical except landing gear struts mounts Beginning center crutch cut out parts pairs center crutch should basically match side view nacelle minus thicknesses firewall sheeting Cut out N-4 pieces glue both sides crutch Glue firewall N-2 N-3 side Add wing platform Install landing gear its plywood anchors bracing gear well Plank nacelles Select pieces ain balsa inch wide eight inches long making sure wood grain runs lengthwise Soak pieces hot water hour two make pliable Wipe off excess water fit roughly over nacelles Bind assembly Ace bandage strips cloth pieces dry bend trim accurate fit over nacelles Glue planking place Cap nacelles % sheet joining wing Test fit nacelles wing somewhat complicated wing dihedral angle bend landing gear strut give nacelles desired appearance Fuselage Cut out sides medium -in balsa sheet Shape nose block band saw jigsaw Cut out formers mark locations both sides Glue nose block sides Working front rear add formers F-4 Position assembly over plan top view Pull tail together making sure sides meet centerline Attach tail post quick-setting glue add remaining formers Sheet fuselage bottom % balsa making certain wood grain runs crosswise Drill hole nose gear dowel Make nose gear /i6 music wire Bind solder axle securely strut Bend over top strut bind hardwood dowel shown install hole nose block Check axle straight otherwise model will try taxi center circle Pin wing assembly place top fuselage Trim openings fuselage formers clear pushrod wing Mount two nylon horns elevator bottoms Pin stabilizer place rear fuselage Sight assembly front rear trimming necessary accurate alignment wing stabilizer fuselage Bend up install twin elevator pushrods Cut exit slots pushrods both sides fuselage bend rods bit assure move freely link up main pushrod Adjust slots wires achieve good i/4 up down elevator travel youre satisfied bind three pushrods copper wire solder securely Glue wing stabilizer fuselage CyA cyanoacrylate glue glue has set fillet joints epoxy top block gives S-2F its 150 Model Aviation WOODWORKING MACHINERY 7 POWERMATIC 562-3538 aleo have CATA LOG $100woodworking PO Box 536-Y icane WV 0 25526 WWII AIRCRAFT SCALE DRAWINGS & SPECIFICATION SHEETS Over 200 $300 Sc,e 3 Vev.Fo CtIog 0rvgsRANGER FIBERGLASS RANGER FIBERGLASS CO has been Box 879 speciahzing custom desgn moldngCampton NH aerospace industry since 7959 03223 distinctive look Use lightweight 34-in balsa sheet available laminate block thinner sheets Rough cut block shape fit wing help achieve accurate fit cut template rib W-2 include allowance leading trailing edges top sheeting rudder/stabilizer juncture carve top block fair rudder stabilizer shelf Its worth effort achieve correct appearance Carve top block final shape Remove hollow block glue back Mount nacelles wings Accurately measure distance fuselage side centerline nacelle Pin nacelles place check alignment Glue nacelles good-quality slow-drying epoxy Mix up some epoxy filler using microballoons favorite commercial brand Both reinforcement appearance sake make small epoxy fillet major component joints fillets have set sand entire model well Fill dents pinholes sand structure final time engine cowlings determined models size cowlings shown plan about size aluminum soda pop can Use cans rounded bottoms angled base look wrong might have wander sparkling water section grocer find right type Before cutting cans apart sand well 600-grit paper remove original paint roughen surface new paint will adhere Cut out can bottom punch hole large enough allow finish job tin snips carefulthe cans made very thin metal have extremely sharp edges Cut cowls length Snip short cuts rear cowl edge make cooling air exit flaps Finishing final assembly Finishing personal matter Since replicating all-metal aircraft however finish must smooth clean used seven coats clear dope seal wood pores achieve good gloss followed several light coats gloss white automotive acrylic enamel applied spray gun allowed three days paint cure added trim colors Neon colors widely available day-gb orange paint appropriate firebomber easy find painted glare panels windows flat black fashioned panel lines control outlines trim tape Add wheels landing gear doors used /32 styrene local railroad model shop doors gloss white plastic requires no paint cutting doors shape include tabs can ilL FL Y WHA T FIX Special Fast Turnaround Now Available CALL uency Conversion $4000 udes Crystals Certification Call Today Ultra Narrow BandAMR Model KMRDC4-7A Years developing bul worth wait Features Dual conversion AGC Dual Crystal Ceramic Filters 50 53 72 75 Mhz Connectors Kraft styles Deans World & specials Specifications Size 275 70mm x 165 415mm x 825 205mm Weight 165 oz Working Voltage 38 -60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1- 85 khz 60db down 301P 3db Image 60db down Service ACe Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals 4- 6 Meter Specials Send Self Addressed Envelope Brochures UPS US Mail Federal Express 000 Shipping Charges Extra Mastercard Visa Accepted Kraft Midwest Inc RADIO115 E Main Northville MI 48167 313 348-0085 FAX 313 348-4175 pressed balsa sheeting anchored glue Mount engines oriented twin 049s cylinders facing downward needle valves facing upward Add fuel tube extensions easier fueling File slot screwdriver top needle valve screwdriver can inserted through hole cowl its time adjust valve Fasten both cowls firewalls short wood screws Mount propellers Balance model center-ofgravity shown plan prototype needed no ballast airplane tail-heavy add lead nose gear strut its nose-heavy try live nose-heavy craft will stable flight Flying Test run engines set needle valves Purchase set steel control lines control handle substantial construction Light-duty nylon lines plastic control handles neither strong enough nor safe enough twin-engine models Head flying field friend get set have fun Theres no mistaking sound two engines sync Keep em flyingD January 1992 151 RCD AM & FM 7 Channel Receiver Special exclusive 6 meters -$7995 TX conversion availablel Full 1991 Specsl Rx alone 72175 mhz-$6995 OrderModel RODiCO Futabla G AM$6995 Model RCO15O Futabla J AM$6995 Model RCO200 Futabla J FM$6995 Model RCD300 Airtronic AM$6995 Model RCD15OKB Kratt K-Line B$6995 Model R0D150JR JR AM$6995 Model RODi 50TH Tower 500$6995 Match tuned Gold 1991 Tx$7495 Tuned aligned updating Tx$7995 Tuned aligned Tx frequency change . $8995 List Prices Exceeds AMA Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Line Units add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1992/01
Page Numbers: 52, 53, 54, 147, 150, 151
GRUMMAN introduced S-2F Tracker little fanfare shortly after World War II Among least known great Grumman aircraft have seen considerable action worlds navies S-2F nevertheless remains service today fact United States Canada have adapted airplane use firebomber As Control Line Scale model firebomber version S-2F probably unique Two experiences motivated build movie Always its hauntingly accurate portrait firebombers highly explosive environment Fire Eater 7 Inspired boyhood memo ries borate bombers movie Al ways Will twin 0496 soon humming flying field too Updated firebomber Control Line Scale twin-049 model lesser-known Grumman design guaranteed turn heads flying field EAllen WuIf 7 4 LUW4 1 RACKER ne aunor IS ssicier Tar auineniic aelal, aown ins airorusnea exnauss sireaKs authors CL Scale original profile view Dubbed Fire Eater 7 model realistic appearance yet easy build An ingenious drop mechanism ejects red tempera powder borate firebomber role no figment authors imagination reflects actual use S-2F United States Canada todaythough Japan Grumman design used coastal patrol craft Full-Size Plans Available Page 188 41 RIWIT EBUWV450 LL1/irsHi iTIP WAGHTva piy maI/B lIARS SEABLICOW a BOTTOMtRACKS MAKE 2 ECKVAIORB ii I IIIIIIII IiIIIIIIII ~-ti-wMOEsIT4II -111-ZIjW-31W-41 W4IWa IIA-ei- Iiw.w1w. IiIIi F 3SBT ARIE LOCATAMS V4U TI TAS hEFTF iax I/4 A/ARElatEALUM POP CAR- COWL IARWITWIB -I/32 lEA LEASOUTSaSONWA/Ioowas soEws2 PLACUlrsHE ABet PLAII z-B~414 CRUTCH 1111 IIII iiii IIii II, 34 OH EG TIP WRAP JOINT A/GLASS TAMIHRAP A/WAU 5 CLOTH A-7~ Bias FROM __EXCEPT AI MARE IS/S25llT TSP MARE ZEACHIF Wa F IPZF4 IN-IN-Sa-s -IAB WIT PLELPILL 1JBE5 WITH HASA I55049 BLACK MEOW posonoa B-A MARE 4 SF I/B SHT I1/1K MA ____________FORK LLERIMWLaS 5/35 WIT LU - F-5FR BALANCE PT ~I/3S5TTRERE7 EAR DOORS BLOCK NOSE }TZ WRAPII DOWELF-IpS ~WU62F Tiacker BALLEN BSLF B sOLDERU5545B9919Ij fly took back summer 10 hot afternoon Id watch excitedly B-17s B-26s PBY-4Ys fueled up filled thick red borate taxied end runway Seeing hearing feeling big machines rumbled staggered air real thrill article Air & Space magazine learned about contemporary usage Grumman S-2F firebomber suppose diminishing supply WW II bombers made inevitable yet never thought S-2F potential attack plane strictly submarine hunter equipped supply sonar buoys little else hadnt imagined carrying torpedoes well An yet undiscovered Control Line Scale subject can difficult find days Looking through some plan catalogs found ordered CL version the S-2F built 1970s plan revealed faithful Scale model Navy version just bit smaller conceptualized twin-engine /2A firebomber version would update model make unique Weve seen cropdusters dust military bombers drop bombseven Japanese bomber launched kamikaze glider borate drop would take some doing wouldnt neat test idea first revived two dormant 049 engines slipped balsa bed shaped like S-2F Making borate next challenge Everything tried red mud red paint either thinned out invisibility fell emerged big glop solution cameas flashes creativity often meduring course bath Pouring Mr Bubble powder childs bath suddenly realized powder would perfect borate would look authentic bomb bay wouldnt have made watertight Red tempera powder looks exactly right slipstream sculpts resemble real borate flows out model Twin-engine hA models great fun invite experimentation yet inexpensive quick build Squadron/Signal Publications Inc offers excellent volume S-2F Tracker book includes color views January 1992 53 Bottom-up view S-2F showing clean-lined looks wheel well doors openings military civilian versions configurations markings offers bit information about Turbo-Tracker now being built Canada United States could miniaturize Turbo-Tracker different look entirely too borate bomber doesnt catch fancy could go torpedo sonar-buoy drop forget about drop sort simply make fun flier Construction Select test engines before building success twin-engine model begins engines reliable matched must able start engines quickly easily power output should approximately equal Control Line models however skewing power output slightly favor inboard engine advantage outboard engine quits slightly powerful inboard will help keep lines taut borate drop mechanism too complicated ready illustration omitted plan Basically mechanism involves set doors spring loaded close rubberbands pair spring-loaded cams rams doors open cams tripped pulling third lead-out system took lot monkeying works may well come up simpler setup make working model drop mechanism before building fuselage Youll need adjust fuselage construction accommodate particular system Wing Begin making inboard left panel Trim sheet A6 x 4-in balsa fit between leading trailing edges LE TE Pin balsa sheet LE TE over plan Glue ribs except W-l place Install bellcrank its mount String lead-outs through inboard wing Make basic pushrod 1/16 music wire pushrod should extend good eight inches beyond trailing edge point will joined rear twin pushrods after wing has installed glue has set remove inboard wing building board position over plan Build right panel directly atop left Pin down leading trailing edges taking care glue mating leading trailing edges opposite wing Glue ribs W-2 through W- 11 wing tip weight Cut out two plywood dihedral joiners fit center section make small balsa wedges achieve accurate fit Carefully cut two wing panels apart Sand bevel dihedral angle Pin panel building board block up other 1 Epoxy panels together Install dihedral joiners W-l Add top wing spar Lift wing off board dihedral joint has set plank top surface 1A6 sheet Add wing tip blocks Drill lead-out holes install bushings left tip Carve leading edges wing tips shape Sand entire wing thoroughly Coat center section epoxy reinforce center joint lightweight fiberglass cloth Tail surfaces high-placed stabilizer dihedral presents couple challenges assembling tail done little differently usual Continued page 147 54 Model Aviation IIC 0ItJIJft@ catiy U. limits takeofib iu dirt paved . aci - engine soda pop cans ruggea ana realislic Plenty cooling air enters through open fronts exit flaps direct air over wing Contrarotating props came dusty box local hobby shop twin elevator horns less compli cated appear hardest part getting pushrods out fit Goldberg nylon Snap R Keepers make easier work assembly adjusting lead-outs made lightweight ca ble exit through thin nylon tubes third line part bomb bay mecha nism Pulling lead-out trips pair spring-loaded cams connected ramming bomb bay doors open BRAIN TEASER FOUR CELLS OR FIVE friend asked What effect using five-cell Ni-Cd pack place fout-cell pack Isnt voltage same four alkaline dry cells arent radios designed work way Shouldnt get operating time five-cell pack Let make important point cell has two ends make contact circuit Assuming four cells flight pack eight places pack poor spring contact can destroy plane Thats Ni-Cd flight packs welded together Lets look test data measured airplanes has Futaba receiver four regular servos Idle current four-cell pack A Idle current five-cell pack A Same setup two servos loaded 30 -oz about mum torque lead sinkers Four-cell pack mA Five-cell pack mA First notice five-cell pack delivers extra 20 mA both unloaded idle loaded conditions important fact increase battery pack voltage increase idle current increase applies time system Second notice current drawn servo under constant mechanical load stalled isnt affected voltage understand electric motors expect result same constant load can calculate 1 The four-cell pack will last 600/240 hours end point 44 VDC 2 The five-cell pack will last 600/260 hours end point 55 VDC ie 11 VDC per cell case doing same work four-cell pack lasts longer Ill bet didnt expect Another factor hidden Higher THE AMERICAN MADE RJL K61 metal multi mix carburetor o-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened l Crankshaft New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Aerospace Quality Invesmient Cast Crankcase Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price just think dont have send Dollars out country obtain Quality expect Priced just few Dollars cheapies below quality competition American Made K61 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 voltages cause hotter sparks will burn away motor brushes faster look brushes servo motors usually find tiny wires crossed cylindrical commutator segments As such make point contact ability dissipate heat very limited five-cell pack will wear out servo motors faster fourcell pack Given disadvantages would anyone choose use five-cell pack common reason get work out smaller servos case electric Whisper Helicopter other electric-powered airplanes trade servo weight propulsion battery weightE responding advertisers mention read about ModelAviation S-2F/WuIf Continued page 54 Cut out stabilizer elevators stiff 4-in balsa sheet Trim gap between parts provide 4e-in clearance after hinging Sand exposed edges hinge lines round profile Cut hinge slots install hinges used Sigs Easy Hinges Cut stabilizer along centerline bevel halves set dihedral As did wing pin stabilizer half board block up other half 1 Epoxy halves together Add fiberglass reinforcement glue joint has set Cut out rudder /6 soft balsa sheet Sand generous airfoil section Continued page 150 WRITE Foe LOG eC-COMBAT PUN-FLYCL-SLUItCL-COMBATFF-IILGA-A CASP-3 January 1992 147 Dual Ball Bearings Modelers choke GMP EPOXIES High Quality Model Construction Jr Kwik Set 6 minute5 oz $ 695 Kwik Set Set Minute10 oz $1095 Giant Quick Set 6 Minute16 oz $1495 Notso Quick 20 Minute10 oz $ 995 OMP AIRCRAFT INSTRUMENTS SOin3/161/4318 1/2$ 179 40in3/4sndoneinch$ 179 EASY OFF PULLER proper tool removing drive wesheessnd flywheels $ 796 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 dealer call 513-385-7398 order direct add $150 postage COHPETETION AIRFRAHESPLY 4OOC S GENESI P 0 nox NVILLE IN 4743e~ en ees 372 PFA Her, SKI CROLEWINSES S WIzAND TOP TEN 0 S CRMPION RITEC POW FL AINPRANE KEVOLAS KOON & OKAN 1 OPS TAO lOtORUER 255e FLAPS S0 CONPOrEK/NIX EXPEKIENCED PILOTS & BLOEKS ONLYPLEASK ENO30 to40 CHEAP SENSATION KEVOLAS BOOMX32 $599 ea CLCOMBAT STAG OXSLO OBLKlTtfoauys 24t $29 REVOLAS LG3/exe2pc4$799pr CLProtile STONTtFoauySpan 4RPatern HasterSr$29 HvyDutyREVGLAS LG e$1O99pr RCCONBATINPERIAL WARRIOR4045tfoamy $49 40 size SCCombat prop $l99 RCCONBATTAILcAToetwoodyObl kiLt23ChELRVONS$35 FOXOERO RACING PROP $199 CLStunt/SPORT IAO9AMERICAN BOY BLTop PROFILE $t5 AERIAL MODEL AIRCRAPT PRODUCTS AMAP cutter boi 2 13 965-9504I AMAP power supply Anodized available Add $17900 $4900 $1000 FLAIR SLOPE Fuselage $6000 Three-piece fuse P tailor V tail also sell cut cores available airfoils MI-142 MH43 MH62 MH64 7003 RGI5 RG14A Foam cores $5000 n s3omFull Money-Back 30 sasmGuarantee& 50 $4510 FLAIR-SLOPE 11/SPORT ELECTRIC Complete $6000 Length 43 h 3 ht 340 & 60 Size Motor Recomnwnded Slip-on Nose Cone Fuselage made EZ LamEpoxy Blue Foam 2 lb Density 24 X 96 X 2 $29 00 Aerospace composite Products Will cut shipping 12 X 48 please specify Bob Ratzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 171/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 S-2F/Wu Continued page 147 full-scale S-2F has two hinge lines long trim hinge rudder cut rudder second stepped hinge line glued % rudder offset amount offset encourages model turn right against its flying circle providing necessary line tension windy conditions fly Its especially helpful engines running Engine pods twin pods identical except landing gear struts mounts Beginning center crutch cut out parts pairs center crutch should basically match side view nacelle minus thicknesses firewall sheeting Cut out N-4 pieces glue both sides crutch Glue firewall N-2 N-3 side Add wing platform Install landing gear its plywood anchors bracing gear well Plank nacelles Select pieces ain balsa inch wide eight inches long making sure wood grain runs lengthwise Soak pieces hot water hour two make pliable Wipe off excess water fit roughly over nacelles Bind assembly Ace bandage strips cloth pieces dry bend trim accurate fit over nacelles Glue planking place Cap nacelles % sheet joining wing Test fit nacelles wing somewhat complicated wing dihedral angle bend landing gear strut give nacelles desired appearance Fuselage Cut out sides medium -in balsa sheet Shape nose block band saw jigsaw Cut out formers mark locations both sides Glue nose block sides Working front rear add formers F-4 Position assembly over plan top view Pull tail together making sure sides meet centerline Attach tail post quick-setting glue add remaining formers Sheet fuselage bottom % balsa making certain wood grain runs crosswise Drill hole nose gear dowel Make nose gear /i6 music wire Bind solder axle securely strut Bend over top strut bind hardwood dowel shown install hole nose block Check axle straight otherwise model will try taxi center circle Pin wing assembly place top fuselage Trim openings fuselage formers clear pushrod wing Mount two nylon horns elevator bottoms Pin stabilizer place rear fuselage Sight assembly front rear trimming necessary accurate alignment wing stabilizer fuselage Bend up install twin elevator pushrods Cut exit slots pushrods both sides fuselage bend rods bit assure move freely link up main pushrod Adjust slots wires achieve good i/4 up down elevator travel youre satisfied bind three pushrods copper wire solder securely Glue wing stabilizer fuselage CyA cyanoacrylate glue glue has set fillet joints epoxy top block gives S-2F its 150 Model Aviation WOODWORKING MACHINERY 7 POWERMATIC 562-3538 aleo have CATA LOG $100woodworking PO Box 536-Y icane WV 0 25526 WWII AIRCRAFT SCALE DRAWINGS & SPECIFICATION SHEETS Over 200 $300 Sc,e 3 Vev.Fo CtIog 0rvgsRANGER FIBERGLASS RANGER FIBERGLASS CO has been Box 879 speciahzing custom desgn moldngCampton NH aerospace industry since 7959 03223 distinctive look Use lightweight 34-in balsa sheet available laminate block thinner sheets Rough cut block shape fit wing help achieve accurate fit cut template rib W-2 include allowance leading trailing edges top sheeting rudder/stabilizer juncture carve top block fair rudder stabilizer shelf Its worth effort achieve correct appearance Carve top block final shape Remove hollow block glue back Mount nacelles wings Accurately measure distance fuselage side centerline nacelle Pin nacelles place check alignment Glue nacelles good-quality slow-drying epoxy Mix up some epoxy filler using microballoons favorite commercial brand Both reinforcement appearance sake make small epoxy fillet major component joints fillets have set sand entire model well Fill dents pinholes sand structure final time engine cowlings determined models size cowlings shown plan about size aluminum soda pop can Use cans rounded bottoms angled base look wrong might have wander sparkling water section grocer find right type Before cutting cans apart sand well 600-grit paper remove original paint roughen surface new paint will adhere Cut out can bottom punch hole large enough allow finish job tin snips carefulthe cans made very thin metal have extremely sharp edges Cut cowls length Snip short cuts rear cowl edge make cooling air exit flaps Finishing final assembly Finishing personal matter Since replicating all-metal aircraft however finish must smooth clean used seven coats clear dope seal wood pores achieve good gloss followed several light coats gloss white automotive acrylic enamel applied spray gun allowed three days paint cure added trim colors Neon colors widely available day-gb orange paint appropriate firebomber easy find painted glare panels windows flat black fashioned panel lines control outlines trim tape Add wheels landing gear doors used /32 styrene local railroad model shop doors gloss white plastic requires no paint cutting doors shape include tabs can ilL FL Y WHA T FIX Special Fast Turnaround Now Available CALL uency Conversion $4000 udes Crystals Certification Call Today Ultra Narrow BandAMR Model KMRDC4-7A Years developing bul worth wait Features Dual conversion AGC Dual Crystal Ceramic Filters 50 53 72 75 Mhz Connectors Kraft styles Deans World & specials Specifications Size 275 70mm x 165 415mm x 825 205mm Weight 165 oz Working Voltage 38 -60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1- 85 khz 60db down 301P 3db Image 60db down Service ACe Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals 4- 6 Meter Specials Send Self Addressed Envelope Brochures UPS US Mail Federal Express 000 Shipping Charges Extra Mastercard Visa Accepted Kraft Midwest Inc RADIO115 E Main Northville MI 48167 313 348-0085 FAX 313 348-4175 pressed balsa sheeting anchored glue Mount engines oriented twin 049s cylinders facing downward needle valves facing upward Add fuel tube extensions easier fueling File slot screwdriver top needle valve screwdriver can inserted through hole cowl its time adjust valve Fasten both cowls firewalls short wood screws Mount propellers Balance model center-ofgravity shown plan prototype needed no ballast airplane tail-heavy add lead nose gear strut its nose-heavy try live nose-heavy craft will stable flight Flying Test run engines set needle valves Purchase set steel control lines control handle substantial construction Light-duty nylon lines plastic control handles neither strong enough nor safe enough twin-engine models Head flying field friend get set have fun Theres no mistaking sound two engines sync Keep em flyingD January 1992 151 RCD AM & FM 7 Channel Receiver Special exclusive 6 meters -$7995 TX conversion availablel Full 1991 Specsl Rx alone 72175 mhz-$6995 OrderModel RODiCO Futabla G AM$6995 Model RCO15O Futabla J AM$6995 Model RCO200 Futabla J FM$6995 Model RCD300 Airtronic AM$6995 Model RCD15OKB Kratt K-Line B$6995 Model R0D150JR JR AM$6995 Model RODi 50TH Tower 500$6995 Match tuned Gold 1991 Tx$7495 Tuned aligned updating Tx$7995 Tuned aligned Tx frequency change . $8995 List Prices Exceeds AMA Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Line Units add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1992/01
Page Numbers: 52, 53, 54, 147, 150, 151
GRUMMAN introduced S-2F Tracker little fanfare shortly after World War II Among least known great Grumman aircraft have seen considerable action worlds navies S-2F nevertheless remains service today fact United States Canada have adapted airplane use firebomber As Control Line Scale model firebomber version S-2F probably unique Two experiences motivated build movie Always its hauntingly accurate portrait firebombers highly explosive environment Fire Eater 7 Inspired boyhood memo ries borate bombers movie Al ways Will twin 0496 soon humming flying field too Updated firebomber Control Line Scale twin-049 model lesser-known Grumman design guaranteed turn heads flying field EAllen WuIf 7 4 LUW4 1 RACKER ne aunor IS ssicier Tar auineniic aelal, aown ins airorusnea exnauss sireaKs authors CL Scale original profile view Dubbed Fire Eater 7 model realistic appearance yet easy build An ingenious drop mechanism ejects red tempera powder borate firebomber role no figment authors imagination reflects actual use S-2F United States Canada todaythough Japan Grumman design used coastal patrol craft Full-Size Plans Available Page 188 41 RIWIT EBUWV450 LL1/irsHi iTIP WAGHTva piy maI/B lIARS SEABLICOW a BOTTOMtRACKS MAKE 2 ECKVAIORB ii I IIIIIIII IiIIIIIIII ~-ti-wMOEsIT4II -111-ZIjW-31W-41 W4IWa IIA-ei- Iiw.w1w. IiIIi F 3SBT ARIE LOCATAMS V4U TI TAS hEFTF iax I/4 A/ARElatEALUM POP CAR- COWL IARWITWIB -I/32 lEA LEASOUTSaSONWA/Ioowas soEws2 PLACUlrsHE ABet PLAII z-B~414 CRUTCH 1111 IIII iiii IIii II, 34 OH EG TIP WRAP JOINT A/GLASS TAMIHRAP A/WAU 5 CLOTH A-7~ Bias FROM __EXCEPT AI MARE IS/S25llT TSP MARE ZEACHIF Wa F IPZF4 IN-IN-Sa-s -IAB WIT PLELPILL 1JBE5 WITH HASA I55049 BLACK MEOW posonoa B-A MARE 4 SF I/B SHT I1/1K MA ____________FORK LLERIMWLaS 5/35 WIT LU - F-5FR BALANCE PT ~I/3S5TTRERE7 EAR DOORS BLOCK NOSE }TZ WRAPII DOWELF-IpS ~WU62F Tiacker BALLEN BSLF B sOLDERU5545B9919Ij fly took back summer 10 hot afternoon Id watch excitedly B-17s B-26s PBY-4Ys fueled up filled thick red borate taxied end runway Seeing hearing feeling big machines rumbled staggered air real thrill article Air & Space magazine learned about contemporary usage Grumman S-2F firebomber suppose diminishing supply WW II bombers made inevitable yet never thought S-2F potential attack plane strictly submarine hunter equipped supply sonar buoys little else hadnt imagined carrying torpedoes well An yet undiscovered Control Line Scale subject can difficult find days Looking through some plan catalogs found ordered CL version the S-2F built 1970s plan revealed faithful Scale model Navy version just bit smaller conceptualized twin-engine /2A firebomber version would update model make unique Weve seen cropdusters dust military bombers drop bombseven Japanese bomber launched kamikaze glider borate drop would take some doing wouldnt neat test idea first revived two dormant 049 engines slipped balsa bed shaped like S-2F Making borate next challenge Everything tried red mud red paint either thinned out invisibility fell emerged big glop solution cameas flashes creativity often meduring course bath Pouring Mr Bubble powder childs bath suddenly realized powder would perfect borate would look authentic bomb bay wouldnt have made watertight Red tempera powder looks exactly right slipstream sculpts resemble real borate flows out model Twin-engine hA models great fun invite experimentation yet inexpensive quick build Squadron/Signal Publications Inc offers excellent volume S-2F Tracker book includes color views January 1992 53 Bottom-up view S-2F showing clean-lined looks wheel well doors openings military civilian versions configurations markings offers bit information about Turbo-Tracker now being built Canada United States could miniaturize Turbo-Tracker different look entirely too borate bomber doesnt catch fancy could go torpedo sonar-buoy drop forget about drop sort simply make fun flier Construction Select test engines before building success twin-engine model begins engines reliable matched must able start engines quickly easily power output should approximately equal Control Line models however skewing power output slightly favor inboard engine advantage outboard engine quits slightly powerful inboard will help keep lines taut borate drop mechanism too complicated ready illustration omitted plan Basically mechanism involves set doors spring loaded close rubberbands pair spring-loaded cams rams doors open cams tripped pulling third lead-out system took lot monkeying works may well come up simpler setup make working model drop mechanism before building fuselage Youll need adjust fuselage construction accommodate particular system Wing Begin making inboard left panel Trim sheet A6 x 4-in balsa fit between leading trailing edges LE TE Pin balsa sheet LE TE over plan Glue ribs except W-l place Install bellcrank its mount String lead-outs through inboard wing Make basic pushrod 1/16 music wire pushrod should extend good eight inches beyond trailing edge point will joined rear twin pushrods after wing has installed glue has set remove inboard wing building board position over plan Build right panel directly atop left Pin down leading trailing edges taking care glue mating leading trailing edges opposite wing Glue ribs W-2 through W- 11 wing tip weight Cut out two plywood dihedral joiners fit center section make small balsa wedges achieve accurate fit Carefully cut two wing panels apart Sand bevel dihedral angle Pin panel building board block up other 1 Epoxy panels together Install dihedral joiners W-l Add top wing spar Lift wing off board dihedral joint has set plank top surface 1A6 sheet Add wing tip blocks Drill lead-out holes install bushings left tip Carve leading edges wing tips shape Sand entire wing thoroughly Coat center section epoxy reinforce center joint lightweight fiberglass cloth Tail surfaces high-placed stabilizer dihedral presents couple challenges assembling tail done little differently usual Continued page 147 54 Model Aviation IIC 0ItJIJft@ catiy U. limits takeofib iu dirt paved . aci - engine soda pop cans ruggea ana realislic Plenty cooling air enters through open fronts exit flaps direct air over wing Contrarotating props came dusty box local hobby shop twin elevator horns less compli cated appear hardest part getting pushrods out fit Goldberg nylon Snap R Keepers make easier work assembly adjusting lead-outs made lightweight ca ble exit through thin nylon tubes third line part bomb bay mecha nism Pulling lead-out trips pair spring-loaded cams connected ramming bomb bay doors open BRAIN TEASER FOUR CELLS OR FIVE friend asked What effect using five-cell Ni-Cd pack place fout-cell pack Isnt voltage same four alkaline dry cells arent radios designed work way Shouldnt get operating time five-cell pack Let make important point cell has two ends make contact circuit Assuming four cells flight pack eight places pack poor spring contact can destroy plane Thats Ni-Cd flight packs welded together Lets look test data measured airplanes has Futaba receiver four regular servos Idle current four-cell pack A Idle current five-cell pack A Same setup two servos loaded 30 -oz about mum torque lead sinkers Four-cell pack mA Five-cell pack mA First notice five-cell pack delivers extra 20 mA both unloaded idle loaded conditions important fact increase battery pack voltage increase idle current increase applies time system Second notice current drawn servo under constant mechanical load stalled isnt affected voltage understand electric motors expect result same constant load can calculate 1 The four-cell pack will last 600/240 hours end point 44 VDC 2 The five-cell pack will last 600/260 hours end point 55 VDC ie 11 VDC per cell case doing same work four-cell pack lasts longer Ill bet didnt expect Another factor hidden Higher THE AMERICAN MADE RJL K61 metal multi mix carburetor o-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened l Crankshaft New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Aerospace Quality Invesmient Cast Crankcase Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price just think dont have send Dollars out country obtain Quality expect Priced just few Dollars cheapies below quality competition American Made K61 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 voltages cause hotter sparks will burn away motor brushes faster look brushes servo motors usually find tiny wires crossed cylindrical commutator segments As such make point contact ability dissipate heat very limited five-cell pack will wear out servo motors faster fourcell pack Given disadvantages would anyone choose use five-cell pack common reason get work out smaller servos case electric Whisper Helicopter other electric-powered airplanes trade servo weight propulsion battery weightE responding advertisers mention read about ModelAviation S-2F/WuIf Continued page 54 Cut out stabilizer elevators stiff 4-in balsa sheet Trim gap between parts provide 4e-in clearance after hinging Sand exposed edges hinge lines round profile Cut hinge slots install hinges used Sigs Easy Hinges Cut stabilizer along centerline bevel halves set dihedral As did wing pin stabilizer half board block up other half 1 Epoxy halves together Add fiberglass reinforcement glue joint has set Cut out rudder /6 soft balsa sheet Sand generous airfoil section Continued page 150 WRITE Foe LOG eC-COMBAT PUN-FLYCL-SLUItCL-COMBATFF-IILGA-A CASP-3 January 1992 147 Dual Ball Bearings Modelers choke GMP EPOXIES High Quality Model Construction Jr Kwik Set 6 minute5 oz $ 695 Kwik Set Set Minute10 oz $1095 Giant Quick Set 6 Minute16 oz $1495 Notso Quick 20 Minute10 oz $ 995 OMP AIRCRAFT INSTRUMENTS SOin3/161/4318 1/2$ 179 40in3/4sndoneinch$ 179 EASY OFF PULLER proper tool removing drive wesheessnd flywheels $ 796 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 dealer call 513-385-7398 order direct add $150 postage COHPETETION AIRFRAHESPLY 4OOC S GENESI P 0 nox NVILLE IN 4743e~ en ees 372 PFA Her, SKI CROLEWINSES S WIzAND TOP TEN 0 S CRMPION RITEC POW FL AINPRANE KEVOLAS KOON & OKAN 1 OPS TAO lOtORUER 255e FLAPS S0 CONPOrEK/NIX EXPEKIENCED PILOTS & BLOEKS ONLYPLEASK ENO30 to40 CHEAP SENSATION KEVOLAS BOOMX32 $599 ea CLCOMBAT STAG OXSLO OBLKlTtfoauys 24t $29 REVOLAS LG3/exe2pc4$799pr CLProtile STONTtFoauySpan 4RPatern HasterSr$29 HvyDutyREVGLAS LG e$1O99pr RCCONBATINPERIAL WARRIOR4045tfoamy $49 40 size SCCombat prop $l99 RCCONBATTAILcAToetwoodyObl kiLt23ChELRVONS$35 FOXOERO RACING PROP $199 CLStunt/SPORT IAO9AMERICAN BOY BLTop PROFILE $t5 AERIAL MODEL AIRCRAPT PRODUCTS AMAP cutter boi 2 13 965-9504I AMAP power supply Anodized available Add $17900 $4900 $1000 FLAIR SLOPE Fuselage $6000 Three-piece fuse P tailor V tail also sell cut cores available airfoils MI-142 MH43 MH62 MH64 7003 RGI5 RG14A Foam cores $5000 n s3omFull Money-Back 30 sasmGuarantee& 50 $4510 FLAIR-SLOPE 11/SPORT ELECTRIC Complete $6000 Length 43 h 3 ht 340 & 60 Size Motor Recomnwnded Slip-on Nose Cone Fuselage made EZ LamEpoxy Blue Foam 2 lb Density 24 X 96 X 2 $29 00 Aerospace composite Products Will cut shipping 12 X 48 please specify Bob Ratzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 171/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 S-2F/Wu Continued page 147 full-scale S-2F has two hinge lines long trim hinge rudder cut rudder second stepped hinge line glued % rudder offset amount offset encourages model turn right against its flying circle providing necessary line tension windy conditions fly Its especially helpful engines running Engine pods twin pods identical except landing gear struts mounts Beginning center crutch cut out parts pairs center crutch should basically match side view nacelle minus thicknesses firewall sheeting Cut out N-4 pieces glue both sides crutch Glue firewall N-2 N-3 side Add wing platform Install landing gear its plywood anchors bracing gear well Plank nacelles Select pieces ain balsa inch wide eight inches long making sure wood grain runs lengthwise Soak pieces hot water hour two make pliable Wipe off excess water fit roughly over nacelles Bind assembly Ace bandage strips cloth pieces dry bend trim accurate fit over nacelles Glue planking place Cap nacelles % sheet joining wing Test fit nacelles wing somewhat complicated wing dihedral angle bend landing gear strut give nacelles desired appearance Fuselage Cut out sides medium -in balsa sheet Shape nose block band saw jigsaw Cut out formers mark locations both sides Glue nose block sides Working front rear add formers F-4 Position assembly over plan top view Pull tail together making sure sides meet centerline Attach tail post quick-setting glue add remaining formers Sheet fuselage bottom % balsa making certain wood grain runs crosswise Drill hole nose gear dowel Make nose gear /i6 music wire Bind solder axle securely strut Bend over top strut bind hardwood dowel shown install hole nose block Check axle straight otherwise model will try taxi center circle Pin wing assembly place top fuselage Trim openings fuselage formers clear pushrod wing Mount two nylon horns elevator bottoms Pin stabilizer place rear fuselage Sight assembly front rear trimming necessary accurate alignment wing stabilizer fuselage Bend up install twin elevator pushrods Cut exit slots pushrods both sides fuselage bend rods bit assure move freely link up main pushrod Adjust slots wires achieve good i/4 up down elevator travel youre satisfied bind three pushrods copper wire solder securely Glue wing stabilizer fuselage CyA cyanoacrylate glue glue has set fillet joints epoxy top block gives S-2F its 150 Model Aviation WOODWORKING MACHINERY 7 POWERMATIC 562-3538 aleo have CATA LOG $100woodworking PO Box 536-Y icane WV 0 25526 WWII AIRCRAFT SCALE DRAWINGS & SPECIFICATION SHEETS Over 200 $300 Sc,e 3 Vev.Fo CtIog 0rvgsRANGER FIBERGLASS RANGER FIBERGLASS CO has been Box 879 speciahzing custom desgn moldngCampton NH aerospace industry since 7959 03223 distinctive look Use lightweight 34-in balsa sheet available laminate block thinner sheets Rough cut block shape fit wing help achieve accurate fit cut template rib W-2 include allowance leading trailing edges top sheeting rudder/stabilizer juncture carve top block fair rudder stabilizer shelf Its worth effort achieve correct appearance Carve top block final shape Remove hollow block glue back Mount nacelles wings Accurately measure distance fuselage side centerline nacelle Pin nacelles place check alignment Glue nacelles good-quality slow-drying epoxy Mix up some epoxy filler using microballoons favorite commercial brand Both reinforcement appearance sake make small epoxy fillet major component joints fillets have set sand entire model well Fill dents pinholes sand structure final time engine cowlings determined models size cowlings shown plan about size aluminum soda pop can Use cans rounded bottoms angled base look wrong might have wander sparkling water section grocer find right type Before cutting cans apart sand well 600-grit paper remove original paint roughen surface new paint will adhere Cut out can bottom punch hole large enough allow finish job tin snips carefulthe cans made very thin metal have extremely sharp edges Cut cowls length Snip short cuts rear cowl edge make cooling air exit flaps Finishing final assembly Finishing personal matter Since replicating all-metal aircraft however finish must smooth clean used seven coats clear dope seal wood pores achieve good gloss followed several light coats gloss white automotive acrylic enamel applied spray gun allowed three days paint cure added trim colors Neon colors widely available day-gb orange paint appropriate firebomber easy find painted glare panels windows flat black fashioned panel lines control outlines trim tape Add wheels landing gear doors used /32 styrene local railroad model shop doors gloss white plastic requires no paint cutting doors shape include tabs can ilL FL Y WHA T FIX Special Fast Turnaround Now Available CALL uency Conversion $4000 udes Crystals Certification Call Today Ultra Narrow BandAMR Model KMRDC4-7A Years developing bul worth wait Features Dual conversion AGC Dual Crystal Ceramic Filters 50 53 72 75 Mhz Connectors Kraft styles Deans World & specials Specifications Size 275 70mm x 165 415mm x 825 205mm Weight 165 oz Working Voltage 38 -60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1- 85 khz 60db down 301P 3db Image 60db down Service ACe Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals 4- 6 Meter Specials Send Self Addressed Envelope Brochures UPS US Mail Federal Express 000 Shipping Charges Extra Mastercard Visa Accepted Kraft Midwest Inc RADIO115 E Main Northville MI 48167 313 348-0085 FAX 313 348-4175 pressed balsa sheeting anchored glue Mount engines oriented twin 049s cylinders facing downward needle valves facing upward Add fuel tube extensions easier fueling File slot screwdriver top needle valve screwdriver can inserted through hole cowl its time adjust valve Fasten both cowls firewalls short wood screws Mount propellers Balance model center-ofgravity shown plan prototype needed no ballast airplane tail-heavy add lead nose gear strut its nose-heavy try live nose-heavy craft will stable flight Flying Test run engines set needle valves Purchase set steel control lines control handle substantial construction Light-duty nylon lines plastic control handles neither strong enough nor safe enough twin-engine models Head flying field friend get set have fun Theres no mistaking sound two engines sync Keep em flyingD January 1992 151 RCD AM & FM 7 Channel Receiver Special exclusive 6 meters -$7995 TX conversion availablel Full 1991 Specsl Rx alone 72175 mhz-$6995 OrderModel RODiCO Futabla G AM$6995 Model RCO15O Futabla J AM$6995 Model RCO200 Futabla J FM$6995 Model RCD300 Airtronic AM$6995 Model RCD15OKB Kratt K-Line B$6995 Model R0D150JR JR AM$6995 Model RODi 50TH Tower 500$6995 Match tuned Gold 1991 Tx$7495 Tuned aligned updating Tx$7995 Tuned aligned Tx frequency change . $8995 List Prices Exceeds AMA Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Line Units add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1992/01
Page Numbers: 52, 53, 54, 147, 150, 151
GRUMMAN introduced S-2F Tracker little fanfare shortly after World War II Among least known great Grumman aircraft have seen considerable action worlds navies S-2F nevertheless remains service today fact United States Canada have adapted airplane use firebomber As Control Line Scale model firebomber version S-2F probably unique Two experiences motivated build movie Always its hauntingly accurate portrait firebombers highly explosive environment Fire Eater 7 Inspired boyhood memo ries borate bombers movie Al ways Will twin 0496 soon humming flying field too Updated firebomber Control Line Scale twin-049 model lesser-known Grumman design guaranteed turn heads flying field EAllen WuIf 7 4 LUW4 1 RACKER ne aunor IS ssicier Tar auineniic aelal, aown ins airorusnea exnauss sireaKs authors CL Scale original profile view Dubbed Fire Eater 7 model realistic appearance yet easy build An ingenious drop mechanism ejects red tempera powder borate firebomber role no figment authors imagination reflects actual use S-2F United States Canada todaythough Japan Grumman design used coastal patrol craft Full-Size Plans Available Page 188 41 RIWIT EBUWV450 LL1/irsHi iTIP WAGHTva piy maI/B lIARS SEABLICOW a BOTTOMtRACKS MAKE 2 ECKVAIORB ii I IIIIIIII IiIIIIIIII ~-ti-wMOEsIT4II -111-ZIjW-31W-41 W4IWa IIA-ei- Iiw.w1w. IiIIi F 3SBT ARIE LOCATAMS V4U TI TAS hEFTF iax I/4 A/ARElatEALUM POP CAR- COWL IARWITWIB -I/32 lEA LEASOUTSaSONWA/Ioowas soEws2 PLACUlrsHE ABet PLAII z-B~414 CRUTCH 1111 IIII iiii IIii II, 34 OH EG TIP WRAP JOINT A/GLASS TAMIHRAP A/WAU 5 CLOTH A-7~ Bias FROM __EXCEPT AI MARE IS/S25llT TSP MARE ZEACHIF Wa F IPZF4 IN-IN-Sa-s -IAB WIT PLELPILL 1JBE5 WITH HASA I55049 BLACK MEOW posonoa B-A MARE 4 SF I/B SHT I1/1K MA ____________FORK LLERIMWLaS 5/35 WIT LU - F-5FR BALANCE PT ~I/3S5TTRERE7 EAR DOORS BLOCK NOSE }TZ WRAPII DOWELF-IpS ~WU62F Tiacker BALLEN BSLF B sOLDERU5545B9919Ij fly took back summer 10 hot afternoon Id watch excitedly B-17s B-26s PBY-4Ys fueled up filled thick red borate taxied end runway Seeing hearing feeling big machines rumbled staggered air real thrill article Air & Space magazine learned about contemporary usage Grumman S-2F firebomber suppose diminishing supply WW II bombers made inevitable yet never thought S-2F potential attack plane strictly submarine hunter equipped supply sonar buoys little else hadnt imagined carrying torpedoes well An yet undiscovered Control Line Scale subject can difficult find days Looking through some plan catalogs found ordered CL version the S-2F built 1970s plan revealed faithful Scale model Navy version just bit smaller conceptualized twin-engine /2A firebomber version would update model make unique Weve seen cropdusters dust military bombers drop bombseven Japanese bomber launched kamikaze glider borate drop would take some doing wouldnt neat test idea first revived two dormant 049 engines slipped balsa bed shaped like S-2F Making borate next challenge Everything tried red mud red paint either thinned out invisibility fell emerged big glop solution cameas flashes creativity often meduring course bath Pouring Mr Bubble powder childs bath suddenly realized powder would perfect borate would look authentic bomb bay wouldnt have made watertight Red tempera powder looks exactly right slipstream sculpts resemble real borate flows out model Twin-engine hA models great fun invite experimentation yet inexpensive quick build Squadron/Signal Publications Inc offers excellent volume S-2F Tracker book includes color views January 1992 53 Bottom-up view S-2F showing clean-lined looks wheel well doors openings military civilian versions configurations markings offers bit information about Turbo-Tracker now being built Canada United States could miniaturize Turbo-Tracker different look entirely too borate bomber doesnt catch fancy could go torpedo sonar-buoy drop forget about drop sort simply make fun flier Construction Select test engines before building success twin-engine model begins engines reliable matched must able start engines quickly easily power output should approximately equal Control Line models however skewing power output slightly favor inboard engine advantage outboard engine quits slightly powerful inboard will help keep lines taut borate drop mechanism too complicated ready illustration omitted plan Basically mechanism involves set doors spring loaded close rubberbands pair spring-loaded cams rams doors open cams tripped pulling third lead-out system took lot monkeying works may well come up simpler setup make working model drop mechanism before building fuselage Youll need adjust fuselage construction accommodate particular system Wing Begin making inboard left panel Trim sheet A6 x 4-in balsa fit between leading trailing edges LE TE Pin balsa sheet LE TE over plan Glue ribs except W-l place Install bellcrank its mount String lead-outs through inboard wing Make basic pushrod 1/16 music wire pushrod should extend good eight inches beyond trailing edge point will joined rear twin pushrods after wing has installed glue has set remove inboard wing building board position over plan Build right panel directly atop left Pin down leading trailing edges taking care glue mating leading trailing edges opposite wing Glue ribs W-2 through W- 11 wing tip weight Cut out two plywood dihedral joiners fit center section make small balsa wedges achieve accurate fit Carefully cut two wing panels apart Sand bevel dihedral angle Pin panel building board block up other 1 Epoxy panels together Install dihedral joiners W-l Add top wing spar Lift wing off board dihedral joint has set plank top surface 1A6 sheet Add wing tip blocks Drill lead-out holes install bushings left tip Carve leading edges wing tips shape Sand entire wing thoroughly Coat center section epoxy reinforce center joint lightweight fiberglass cloth Tail surfaces high-placed stabilizer dihedral presents couple challenges assembling tail done little differently usual Continued page 147 54 Model Aviation IIC 0ItJIJft@ catiy U. limits takeofib iu dirt paved . aci - engine soda pop cans ruggea ana realislic Plenty cooling air enters through open fronts exit flaps direct air over wing Contrarotating props came dusty box local hobby shop twin elevator horns less compli cated appear hardest part getting pushrods out fit Goldberg nylon Snap R Keepers make easier work assembly adjusting lead-outs made lightweight ca ble exit through thin nylon tubes third line part bomb bay mecha nism Pulling lead-out trips pair spring-loaded cams connected ramming bomb bay doors open BRAIN TEASER FOUR CELLS OR FIVE friend asked What effect using five-cell Ni-Cd pack place fout-cell pack Isnt voltage same four alkaline dry cells arent radios designed work way Shouldnt get operating time five-cell pack Let make important point cell has two ends make contact circuit Assuming four cells flight pack eight places pack poor spring contact can destroy plane Thats Ni-Cd flight packs welded together Lets look test data measured airplanes has Futaba receiver four regular servos Idle current four-cell pack A Idle current five-cell pack A Same setup two servos loaded 30 -oz about mum torque lead sinkers Four-cell pack mA Five-cell pack mA First notice five-cell pack delivers extra 20 mA both unloaded idle loaded conditions important fact increase battery pack voltage increase idle current increase applies time system Second notice current drawn servo under constant mechanical load stalled isnt affected voltage understand electric motors expect result same constant load can calculate 1 The four-cell pack will last 600/240 hours end point 44 VDC 2 The five-cell pack will last 600/260 hours end point 55 VDC ie 11 VDC per cell case doing same work four-cell pack lasts longer Ill bet didnt expect Another factor hidden Higher THE AMERICAN MADE RJL K61 metal multi mix carburetor o-ring sealed needles Suggested Retail $16995 including muffler Two year warranty piece Hardened l Crankshaft New double baffle muffler Exceptionally durable single ring forged piston fitted hardened steel cylinder Schnuerle Ported Forged connecting rod bushed both ends 0-ring sealed Back Cover Aerospace Quality Invesmient Cast Crankcase Last year installed latest computer controlled machine technology now new K6 proof positive superior quality engine can produced right America affordable price just think dont have send Dollars out country obtain Quality expect Priced just few Dollars cheapies below quality competition American Made K61 truly exceptional value Best have problem technical question factory just phone call away See favorite dealer contact us Information complete line RJL HP engines RJL Industries USA ox S Sierra Madre CA 91025 Telephone 818 359-0016 voltages cause hotter sparks will burn away motor brushes faster look brushes servo motors usually find tiny wires crossed cylindrical commutator segments As such make point contact ability dissipate heat very limited five-cell pack will wear out servo motors faster fourcell pack Given disadvantages would anyone choose use five-cell pack common reason get work out smaller servos case electric Whisper Helicopter other electric-powered airplanes trade servo weight propulsion battery weightE responding advertisers mention read about ModelAviation S-2F/WuIf Continued page 54 Cut out stabilizer elevators stiff 4-in balsa sheet Trim gap between parts provide 4e-in clearance after hinging Sand exposed edges hinge lines round profile Cut hinge slots install hinges used Sigs Easy Hinges Cut stabilizer along centerline bevel halves set dihedral As did wing pin stabilizer half board block up other half 1 Epoxy halves together Add fiberglass reinforcement glue joint has set Cut out rudder /6 soft balsa sheet Sand generous airfoil section Continued page 150 WRITE Foe LOG eC-COMBAT PUN-FLYCL-SLUItCL-COMBATFF-IILGA-A CASP-3 January 1992 147 Dual Ball Bearings Modelers choke GMP EPOXIES High Quality Model Construction Jr Kwik Set 6 minute5 oz $ 695 Kwik Set Set Minute10 oz $1095 Giant Quick Set 6 Minute16 oz $1495 Notso Quick 20 Minute10 oz $ 995 OMP AIRCRAFT INSTRUMENTS SOin3/161/4318 1/2$ 179 40in3/4sndoneinch$ 179 EASY OFF PULLER proper tool removing drive wesheessnd flywheels $ 796 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 dealer call 513-385-7398 order direct add $150 postage COHPETETION AIRFRAHESPLY 4OOC S GENESI P 0 nox NVILLE IN 4743e~ en ees 372 PFA Her, SKI CROLEWINSES S WIzAND TOP TEN 0 S CRMPION RITEC POW FL AINPRANE KEVOLAS KOON & OKAN 1 OPS TAO lOtORUER 255e FLAPS S0 CONPOrEK/NIX EXPEKIENCED PILOTS & BLOEKS ONLYPLEASK ENO30 to40 CHEAP SENSATION KEVOLAS BOOMX32 $599 ea CLCOMBAT STAG OXSLO OBLKlTtfoauys 24t $29 REVOLAS LG3/exe2pc4$799pr CLProtile STONTtFoauySpan 4RPatern HasterSr$29 HvyDutyREVGLAS LG e$1O99pr RCCONBATINPERIAL WARRIOR4045tfoamy $49 40 size SCCombat prop $l99 RCCONBATTAILcAToetwoodyObl kiLt23ChELRVONS$35 FOXOERO RACING PROP $199 CLStunt/SPORT IAO9AMERICAN BOY BLTop PROFILE $t5 AERIAL MODEL AIRCRAPT PRODUCTS AMAP cutter boi 2 13 965-9504I AMAP power supply Anodized available Add $17900 $4900 $1000 FLAIR SLOPE Fuselage $6000 Three-piece fuse P tailor V tail also sell cut cores available airfoils MI-142 MH43 MH62 MH64 7003 RGI5 RG14A Foam cores $5000 n s3omFull Money-Back 30 sasmGuarantee& 50 $4510 FLAIR-SLOPE 11/SPORT ELECTRIC Complete $6000 Length 43 h 3 ht 340 & 60 Size Motor Recomnwnded Slip-on Nose Cone Fuselage made EZ LamEpoxy Blue Foam 2 lb Density 24 X 96 X 2 $29 00 Aerospace composite Products Will cut shipping 12 X 48 please specify Bob Ratzlaff 1641 South Elismere Ave Los Angles CA 90019 ASW 171/4 Scale 4 M Basic Kit $28500 Thermal Phase Hand Launch 60 E 387 $5000 S-2F/Wu Continued page 147 full-scale S-2F has two hinge lines long trim hinge rudder cut rudder second stepped hinge line glued % rudder offset amount offset encourages model turn right against its flying circle providing necessary line tension windy conditions fly Its especially helpful engines running Engine pods twin pods identical except landing gear struts mounts Beginning center crutch cut out parts pairs center crutch should basically match side view nacelle minus thicknesses firewall sheeting Cut out N-4 pieces glue both sides crutch Glue firewall N-2 N-3 side Add wing platform Install landing gear its plywood anchors bracing gear well Plank nacelles Select pieces ain balsa inch wide eight inches long making sure wood grain runs lengthwise Soak pieces hot water hour two make pliable Wipe off excess water fit roughly over nacelles Bind assembly Ace bandage strips cloth pieces dry bend trim accurate fit over nacelles Glue planking place Cap nacelles % sheet joining wing Test fit nacelles wing somewhat complicated wing dihedral angle bend landing gear strut give nacelles desired appearance Fuselage Cut out sides medium -in balsa sheet Shape nose block band saw jigsaw Cut out formers mark locations both sides Glue nose block sides Working front rear add formers F-4 Position assembly over plan top view Pull tail together making sure sides meet centerline Attach tail post quick-setting glue add remaining formers Sheet fuselage bottom % balsa making certain wood grain runs crosswise Drill hole nose gear dowel Make nose gear /i6 music wire Bind solder axle securely strut Bend over top strut bind hardwood dowel shown install hole nose block Check axle straight otherwise model will try taxi center circle Pin wing assembly place top fuselage Trim openings fuselage formers clear pushrod wing Mount two nylon horns elevator bottoms Pin stabilizer place rear fuselage Sight assembly front rear trimming necessary accurate alignment wing stabilizer fuselage Bend up install twin elevator pushrods Cut exit slots pushrods both sides fuselage bend rods bit assure move freely link up main pushrod Adjust slots wires achieve good i/4 up down elevator travel youre satisfied bind three pushrods copper wire solder securely Glue wing stabilizer fuselage CyA cyanoacrylate glue glue has set fillet joints epoxy top block gives S-2F its 150 Model Aviation WOODWORKING MACHINERY 7 POWERMATIC 562-3538 aleo have CATA LOG $100woodworking PO Box 536-Y icane WV 0 25526 WWII AIRCRAFT SCALE DRAWINGS & SPECIFICATION SHEETS Over 200 $300 Sc,e 3 Vev.Fo CtIog 0rvgsRANGER FIBERGLASS RANGER FIBERGLASS CO has been Box 879 speciahzing custom desgn moldngCampton NH aerospace industry since 7959 03223 distinctive look Use lightweight 34-in balsa sheet available laminate block thinner sheets Rough cut block shape fit wing help achieve accurate fit cut template rib W-2 include allowance leading trailing edges top sheeting rudder/stabilizer juncture carve top block fair rudder stabilizer shelf Its worth effort achieve correct appearance Carve top block final shape Remove hollow block glue back Mount nacelles wings Accurately measure distance fuselage side centerline nacelle Pin nacelles place check alignment Glue nacelles good-quality slow-drying epoxy Mix up some epoxy filler using microballoons favorite commercial brand Both reinforcement appearance sake make small epoxy fillet major component joints fillets have set sand entire model well Fill dents pinholes sand structure final time engine cowlings determined models size cowlings shown plan about size aluminum soda pop can Use cans rounded bottoms angled base look wrong might have wander sparkling water section grocer find right type Before cutting cans apart sand well 600-grit paper remove original paint roughen surface new paint will adhere Cut out can bottom punch hole large enough allow finish job tin snips carefulthe cans made very thin metal have extremely sharp edges Cut cowls length Snip short cuts rear cowl edge make cooling air exit flaps Finishing final assembly Finishing personal matter Since replicating all-metal aircraft however finish must smooth clean used seven coats clear dope seal wood pores achieve good gloss followed several light coats gloss white automotive acrylic enamel applied spray gun allowed three days paint cure added trim colors Neon colors widely available day-gb orange paint appropriate firebomber easy find painted glare panels windows flat black fashioned panel lines control outlines trim tape Add wheels landing gear doors used /32 styrene local railroad model shop doors gloss white plastic requires no paint cutting doors shape include tabs can ilL FL Y WHA T FIX Special Fast Turnaround Now Available CALL uency Conversion $4000 udes Crystals Certification Call Today Ultra Narrow BandAMR Model KMRDC4-7A Years developing bul worth wait Features Dual conversion AGC Dual Crystal Ceramic Filters 50 53 72 75 Mhz Connectors Kraft styles Deans World & specials Specifications Size 275 70mm x 165 415mm x 825 205mm Weight 165 oz Working Voltage 38 -60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1- 85 khz 60db down 301P 3db Image 60db down Service ACe Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals 4- 6 Meter Specials Send Self Addressed Envelope Brochures UPS US Mail Federal Express 000 Shipping Charges Extra Mastercard Visa Accepted Kraft Midwest Inc RADIO115 E Main Northville MI 48167 313 348-0085 FAX 313 348-4175 pressed balsa sheeting anchored glue Mount engines oriented twin 049s cylinders facing downward needle valves facing upward Add fuel tube extensions easier fueling File slot screwdriver top needle valve screwdriver can inserted through hole cowl its time adjust valve Fasten both cowls firewalls short wood screws Mount propellers Balance model center-ofgravity shown plan prototype needed no ballast airplane tail-heavy add lead nose gear strut its nose-heavy try live nose-heavy craft will stable flight Flying Test run engines set needle valves Purchase set steel control lines control handle substantial construction Light-duty nylon lines plastic control handles neither strong enough nor safe enough twin-engine models Head flying field friend get set have fun Theres no mistaking sound two engines sync Keep em flyingD January 1992 151 RCD AM & FM 7 Channel Receiver Special exclusive 6 meters -$7995 TX conversion availablel Full 1991 Specsl Rx alone 72175 mhz-$6995 OrderModel RODiCO Futabla G AM$6995 Model RCO15O Futabla J AM$6995 Model RCO200 Futabla J FM$6995 Model RCD300 Airtronic AM$6995 Model RCD15OKB Kratt K-Line B$6995 Model R0D150JR JR AM$6995 Model RODi 50TH Tower 500$6995 Match tuned Gold 1991 Tx$7495 Tuned aligned updating Tx$7995 Tuned aligned Tx frequency change . $8995 List Prices Exceeds AMA Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Line Units add $1000 Dealers Discounts available Rx Trade $5-$10