w several years now Pylon Racing circuit has dominated two designs Now theres new name add list its already consistently whip ping planes have led pack long steady stable flight also makes air- nization Notes world-class John H u nton plane easy launch good racing train- CL Team Race competitor J R Aibritton er later article cover maximize FOR THE PYLON RACER wants best RC flier wants get Pylon Racing anyone wants see what Cox Tee Dee can really Taperwing exciting possibility Designed collaboration J E Al britton racer faster GLH smoother Undertaker Thanks its minimal frontal area ta pored wing fuselage single-aileron model achieves 90-plus mph speeds stretch limits standard performance yet still complies AMA rules RC Pylon Racing good test several key facets RC modeling airframe pro pulsion piloting organization value hA subcategoiy sim plifies event makes possible anyone compete Taperwing extends advantage further incorporating con cepts sharpen competitive edge Heres Airframe features lowest possible frontal area within rules wing tapered fuselage well single aileron helps hold up nose airplane entering turn ta pered wing planform improves efficiency turns Incidence twists offsets used greatest aerodynamic efficiency Propulsion getting out engine enhanced See discussion fuels propellers later article Piloting tight Pylon Race course far easier airplane twitchier jumpier model Taperwings elongated configuration gives 52 Model Aviation Contestants Northern Virginal RC Clubs spring 1987 V2A Pylon Race Four Taperwing planlorms visible belong Dave Beazel JE Albritton Clay Hunton earlier version author clubs race August Taperwings won top three places Designer John Hunton Taperwing model model meets requirements AMA Pylon Racing event Clubs Johns area permit crankcase pressure used pit operations increase over reliability taperwing design has gone through iterative development process has two seasons racing behind Although theyre engineered AMA rules shapes proportions model nev ertheless unique Evidence designs inherent stability caine during race Reston VA first heat Taperwing lapping slow er model two collided com plete side horizontal stabilizer el evator Taperwing sheared off flush fuselage half stabi lizer model continued fly did other airplane won race four remaining races AMA rules 1AA racing planes summarized follows Minimum weight20 oz Taperwing can built under 16 oz 20 oz lb nimumwingarea200si sf S Wing root depth% Fuselage width225 Fuselage depth350 following assumptions made calculations Weight z lb r density 38 city Taperwing ph fps rontal area Taperwing si sf rontal area GLH 335 sf rsepower output Tee Dee HPR series calculations can made above information derive gross ap proximation difference perform ance between GLH Taperwing Calculating coefficient drag Cd Taperwing HPR 75 01 Dt x 132/375 Drag T 0284 lb Dt Cd S 284 000238 x 132 x Cd x 157 Cd T 2 Using Cd value GLH g working back drag Dg 000238 x V2 x 00872 x 0233 Dg 241 V now velocity HPR 75 01 00000241V2 V/375 V GLH fps 79 mph calculation shows engine same horsepower output Taperwing will 90 mph GLH will January 1989 53 N7 W5 < Fl - Left The roughed-out wing fuselage components Right plans show wing attachment also another method allows easier access fuel tank Radio installation easy two servos Note foam tape over receiver protect 79 mph simplified calcula tions consider variables thus essentially approximations However actual racing against GLHs Taperwing does seem considerably faster Construction Taperwing simple GLH results worth trouble want compet itive following notes keyed construction sketches Fl Build fuselage crutch directly over plan wax paper Use firm x 1-in balsa crutch crossmembers F2 Cut formers A-in balsa Note doubled formers top fuselage halves part accommo date wing far forward fuse lage divides somewhat discretionary alternate location shown plan However separating fuselage forward leading edge wing will weaken parting leading edge ham pers access fuel tank choice yours suggested plan radio system fuel tank installations pre cut formers will have trimmed out top stringer either very soft in balsa two strips n balsa laminated together F-3 Remove assembly plan assemble bottom formers string ers crutch F-4 Using sanding block sand areas side sheet parts flat except rearmost six eight inches fuselage Use /16 medium-soft balsa sides F-5 Prepare A-in plywood firewall blind nuts Fourmost engine mount glue fuselage Trim sand fuselage prime resand before making wing joint stabilizer mount cutouts After wing cutout made install A-in firm balsa doublers inside lower cutout area dou blers very important continuity strength throughout wing mount area Fourmost engine mount can now trimmed down fitted match fuse lage profile Drill hidden holes mount necessary lighten balance mount delivered factory lit tle heavy kind model W-1 Glue wing plan straight level work surface Cut wing jig parts A-in balsa glue over 4 0 ccUIZL LcZIZ ZZLZ 4i____ zZZzL W 7 UE 7MPU76V II II07 -5LoJ SL~Z / Lz 4 4S77 woil571IISI 7757]GIl1II TAP5MNG K5757 775 MAAW MArL4 Aba. plan Coat jig surfaces soap pre vent adhesion assembled wings jig can reused future wing assemblies W-2 Cut top sheet pieces 1/16 balsa noting top sheet continu ous wing built top down proper dihedral Cut trailing edge pieces length notch Pin parts jig W-3 Cut wing ribs /16 balsa glue place Cut out install four spar gussets Install continuous n tapered block using firm wood across center section Sand assem bly sandpaper board smooth out parts W-4 Cut out install /16 balsa bot tom sheet parts After sanding exposed surfaces smooth apply filament tape shown span sheet joint W-5 Remove wing jig sand surfaces Prime wing center see tion Prepare wing desired ai leron control system continuous aileron will easier notched type efficient plan shows alternate torque rod loca tions Y6-in dowel can used make exposed horn type rod sufficiently rigid will difficult achieve comparable rigidity hidden horn type sure weight opposite wing good lateral balance After mating wing bottom shell fuselage paying very close attention positive incidence setting fuse lage top fairing can joined wing two steps tedious entire assembly careful perform accurately Cut out tailpieces sand smooth airfoil shapes shown Note cross-grained pieces installed tailplane tips Cut out elevator Assemble horizontal vertical tailpieces fuselage Note incidence horizon tal stabilizer offset vertical stabilizer counteracts torque prototypes exposed balsa parts primed nitrate clear dope coated several layers Black Baron 54 Model Aviation Full-Size Plans Available. See Page 196 TAPERWING 1/2 PYLON RACER / DESIGN BY JOHN HUNTON WITH J E ALBRITTON AUG 87 DRAWN BY HUNTON 87 REAR VIEW SHOWING LOW FRONTAL AREA U w NG RIB TEMPLATE JIG TEMPLATE zz HORIZONTAL STABILIZER B ELEVATOR I/B BALSA RIBS I/IBBALSA JIGS 114 BALSA 412Zff2 BALA BLOCK 000000III __ROD 3/16 DOWEL IItTORGUE ROD ALL FORMERS 1/8 BALSA WING_ANTENNA HOLES _CUTOUTSHEATH QM ROUTENOTE SAND CORNERSSHEETS WIR PUSH ROD ROUND--- B SHEETSDS IINUTPLATE r-iIIRECEIVER IiI PlC tJDEE I/IB PLY-LIILL~~L4II GLASS CLOTH WICYANO Bernie Stuecker launches Dave Beazelys Taperwing during race sponsored Prince Georges RC Club Dave back ground gets ready rip around course JE Aibritton shows off very small frontal area Taperwing design Minimal drag key going fast Next important high-speed stability model excells both January 1989 55 [ NOTE FIN OFFSET RADIO CONTROL SHORT KITS FOR THE SPORT MODELER7 BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LIHE DESIGHED BY THE PROFESSIOHAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WiNG AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER AN INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND PUN TO FLY ViSIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL Phone 81514590417 F4U CORSAIR 56 SPAN44 95 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OP MODEL ENGINEERING THAT IS HARD TO BEAT THEY NAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE A-26 INVADER 68 SPAN 6495 MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZBRO 54 SPAN3750 P-40 TOMAHAWK 55 SPAN3750 p39 AIRACOBRA 55 SPAN3750 P51 D MUSTANG 54 SPAN3750 C203 FOLGORE 56 SPAN3750 FOCKE WUIF 190 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST EE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG epoxy clear Use heat shrink covering wing panels strongly advised se lect colors model very light top equally dark bottom racing perspective con stantly changing must able dis cern immediately whether model up right inverted addition use distinc tive scheme top easy recognition judges Suspend fuel tank foam prevent fuel frothing See plan diagrammatic fuel tank rigging AMA rules event mandates fuel shutoff provided Locating fuel pickup near bottom tank allows model verted flight starve engine fuel good hinging systems avail able simplest approaches cut hinges Mylar drafting sheets Install hinges cyanoacrylate glue CyA sure insert pins secure Finish installing controls servos goldenrod-type pushrod system recom mended elevator actuation Install piece pushrod inner sheath run tenna through tail Install radio gear Check balance point carefully Dont hesitate add ballast necessary obtain good control response comes correctly balanced model Check lateral balance well wing heavy re sult will tendency airplane roll out pylon turn following notes engines propel lers fuels provided co-designer J E Albritton Engines Stock AMA rules tollowed closely use stock engines required ever because variances dimen sions due manufacturing tolerances possible get higher-performance engine trying different combinations pistons cylinders several engines test ing see combination produces best results Work glow plug find highest practical compression ratio removing washers increase com pression still maintains good needle valve insensitivity ease starting Semistock Kustom Kraftsmanship KK sells fine powerful example reason able price engine has dimension ally improved comes fine-thread nee dle valve can purchased drilled venturi pressure-tapped backplate KK engine Taperwing make fine team Modified engines Mild Some clubs allow mild modifications Advanced Transmitter Capabilities Low Cost ATRC STM Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability Fully installed kit Control Systems Laboratoi 238 5 Hiliview Dr Milpitas CA 95035 408 946-4142 Airtrunies Module TSP IM registered trademarks Airtronics Inc A-tracks Works with standard FM/PPM Receivers AirtronicsTht PCM Receivers Convertsthe Module 75PM advanced computerized control system Advanced Technology Radio Control System 56 Model Aviation 9 FOR 40 TO 60 ENGINE 9 FOR 25 TO 50 ENGINES P 38 LIGHTNING 70 SPAN . 7495 PRECISION MODEL PRODUCTS 5Zii~V Made n USA BARSTOCK ALUMINUM SPINNERS Part NoSize 11-150-B .. 1-112 11-175-B .. 1-314 11-200-B T1-225-B .. 2-114 T1-226-B .. 2-114 FAt . TT-250-B . 2-112 TT-251-B .. 2-1/2FAI .. T1-275-B 314 TT-276-B .. 2-3/4 FAt .. TT-300-B TT-301-BFAt TT-325-B .. 3-1/4 TT-350-B .. 3-1/2 TT-375-B .. 3-3/4 TT-400-B RetailApprox PriceWeight S1395058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570ez 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS Part NoSize 1T-140-A.1/4-28 TT-147-A114-28/7mm 1T-610-A.6 x 10mm TT-710-A7x 10mm rT-516-A5/16-24 TT-518-A.5/16-24/8mm TT-810-A. 8 x 10mm TT-825-A.8x 125mm TT-375-A3/8-24 . 1T-125-A10 m RetailApprox PriceWeight S495061oz 495061oz 495 063oz 495082oz 4950760z 495076oz 495076oz 4950 75oz 595 oz 5951 lSoz 3 Pieces Nut Washer atid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 will increase engine reliability mods consist using 72-turn needle valve Kustom Kraftsmanship KK pressure fuel system employs pres sure-tapped backplate also KK Wild An appreciable power increase can achieved drilling venturi %2 mod requires use pressure fuel system Another significant change requires special machining modify transfer ports tapered configuration have limited capability perform some mods Write get details J E Aibritton s address appears end article Propellers Stock The Cox 5 x 3 propeller works best prop has actual pitch over 4 Semistock 434 x 3 Kustom Krafts manship Sorta-stock An Aibritton carbon fiber spe cial prop /2A available limited quantities Write details best prop known us time writing Nonstock Remove re leading edge Cox 5 x 3 sand airfoil back onto top shorten 434 Note For optimal engine performance air propeller should al lows engine exceed 23 OOO rpm ground Fuels Cox racing fuel very hard beat Cox engines particular run well No other brand fuel under-30% nitro recommended Reliability organization Follow acronym KISS Keep Sim ple Stupid Plan what equipment need use same equipment time fly Repetition reliability Flying The Taperwing designed built Pylon Racing flying offi cial pylon course model close turns very tight other kinds flying dont let Taperwing get too far away models very low frontal profile makes difficult see distance nose tends rise dip com pletion turn check position transmitter stickchances pulled straight back smoother faster per formance flying pylon course set con trol throws minimum Kustom Kraftsmanship PO Box 3010 Fallbrook CA 92028 J E Albritton 503 Orrin Dr Vienna VA 22180 THE LEADER IN COMPETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEOTOGIVE MAXIM UM TH RUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQU ES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THPPRtCE 126677/28 1567 136778 14677/8 16 678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPtTCHPRICE 53/34 634 72833456 833/4568 645667 9456677/ 1045667 106W8W 10SEW Ii SW 11 6EW 11/ 67 12 4W 12 SW 12 56 13 56 14 56 15 56 16 4N 16 678 RC PYLON RACING SERIES 500 OtA PtTCHPRICE 75N5N 8/67/z78 SERIES 400C 63/a66777 9777 W WtDE BLADE EW EXTRA WtDE N NARROW January 1989 57
Edition: Model Aviation - 1989/01
Page Numbers: 52, 53, 54, 55, 56, 57
w several years now Pylon Racing circuit has dominated two designs Now theres new name add list its already consistently whip ping planes have led pack long steady stable flight also makes air- nization Notes world-class John H u nton plane easy launch good racing train- CL Team Race competitor J R Aibritton er later article cover maximize FOR THE PYLON RACER wants best RC flier wants get Pylon Racing anyone wants see what Cox Tee Dee can really Taperwing exciting possibility Designed collaboration J E Al britton racer faster GLH smoother Undertaker Thanks its minimal frontal area ta pored wing fuselage single-aileron model achieves 90-plus mph speeds stretch limits standard performance yet still complies AMA rules RC Pylon Racing good test several key facets RC modeling airframe pro pulsion piloting organization value hA subcategoiy sim plifies event makes possible anyone compete Taperwing extends advantage further incorporating con cepts sharpen competitive edge Heres Airframe features lowest possible frontal area within rules wing tapered fuselage well single aileron helps hold up nose airplane entering turn ta pered wing planform improves efficiency turns Incidence twists offsets used greatest aerodynamic efficiency Propulsion getting out engine enhanced See discussion fuels propellers later article Piloting tight Pylon Race course far easier airplane twitchier jumpier model Taperwings elongated configuration gives 52 Model Aviation Contestants Northern Virginal RC Clubs spring 1987 V2A Pylon Race Four Taperwing planlorms visible belong Dave Beazel JE Albritton Clay Hunton earlier version author clubs race August Taperwings won top three places Designer John Hunton Taperwing model model meets requirements AMA Pylon Racing event Clubs Johns area permit crankcase pressure used pit operations increase over reliability taperwing design has gone through iterative development process has two seasons racing behind Although theyre engineered AMA rules shapes proportions model nev ertheless unique Evidence designs inherent stability caine during race Reston VA first heat Taperwing lapping slow er model two collided com plete side horizontal stabilizer el evator Taperwing sheared off flush fuselage half stabi lizer model continued fly did other airplane won race four remaining races AMA rules 1AA racing planes summarized follows Minimum weight20 oz Taperwing can built under 16 oz 20 oz lb nimumwingarea200si sf S Wing root depth% Fuselage width225 Fuselage depth350 following assumptions made calculations Weight z lb r density 38 city Taperwing ph fps rontal area Taperwing si sf rontal area GLH 335 sf rsepower output Tee Dee HPR series calculations can made above information derive gross ap proximation difference perform ance between GLH Taperwing Calculating coefficient drag Cd Taperwing HPR 75 01 Dt x 132/375 Drag T 0284 lb Dt Cd S 284 000238 x 132 x Cd x 157 Cd T 2 Using Cd value GLH g working back drag Dg 000238 x V2 x 00872 x 0233 Dg 241 V now velocity HPR 75 01 00000241V2 V/375 V GLH fps 79 mph calculation shows engine same horsepower output Taperwing will 90 mph GLH will January 1989 53 N7 W5 < Fl - Left The roughed-out wing fuselage components Right plans show wing attachment also another method allows easier access fuel tank Radio installation easy two servos Note foam tape over receiver protect 79 mph simplified calcula tions consider variables thus essentially approximations However actual racing against GLHs Taperwing does seem considerably faster Construction Taperwing simple GLH results worth trouble want compet itive following notes keyed construction sketches Fl Build fuselage crutch directly over plan wax paper Use firm x 1-in balsa crutch crossmembers F2 Cut formers A-in balsa Note doubled formers top fuselage halves part accommo date wing far forward fuse lage divides somewhat discretionary alternate location shown plan However separating fuselage forward leading edge wing will weaken parting leading edge ham pers access fuel tank choice yours suggested plan radio system fuel tank installations pre cut formers will have trimmed out top stringer either very soft in balsa two strips n balsa laminated together F-3 Remove assembly plan assemble bottom formers string ers crutch F-4 Using sanding block sand areas side sheet parts flat except rearmost six eight inches fuselage Use /16 medium-soft balsa sides F-5 Prepare A-in plywood firewall blind nuts Fourmost engine mount glue fuselage Trim sand fuselage prime resand before making wing joint stabilizer mount cutouts After wing cutout made install A-in firm balsa doublers inside lower cutout area dou blers very important continuity strength throughout wing mount area Fourmost engine mount can now trimmed down fitted match fuse lage profile Drill hidden holes mount necessary lighten balance mount delivered factory lit tle heavy kind model W-1 Glue wing plan straight level work surface Cut wing jig parts A-in balsa glue over 4 0 ccUIZL LcZIZ ZZLZ 4i____ zZZzL W 7 UE 7MPU76V II II07 -5LoJ SL~Z / Lz 4 4S77 woil571IISI 7757]GIl1II TAP5MNG K5757 775 MAAW MArL4 Aba. plan Coat jig surfaces soap pre vent adhesion assembled wings jig can reused future wing assemblies W-2 Cut top sheet pieces 1/16 balsa noting top sheet continu ous wing built top down proper dihedral Cut trailing edge pieces length notch Pin parts jig W-3 Cut wing ribs /16 balsa glue place Cut out install four spar gussets Install continuous n tapered block using firm wood across center section Sand assem bly sandpaper board smooth out parts W-4 Cut out install /16 balsa bot tom sheet parts After sanding exposed surfaces smooth apply filament tape shown span sheet joint W-5 Remove wing jig sand surfaces Prime wing center see tion Prepare wing desired ai leron control system continuous aileron will easier notched type efficient plan shows alternate torque rod loca tions Y6-in dowel can used make exposed horn type rod sufficiently rigid will difficult achieve comparable rigidity hidden horn type sure weight opposite wing good lateral balance After mating wing bottom shell fuselage paying very close attention positive incidence setting fuse lage top fairing can joined wing two steps tedious entire assembly careful perform accurately Cut out tailpieces sand smooth airfoil shapes shown Note cross-grained pieces installed tailplane tips Cut out elevator Assemble horizontal vertical tailpieces fuselage Note incidence horizon tal stabilizer offset vertical stabilizer counteracts torque prototypes exposed balsa parts primed nitrate clear dope coated several layers Black Baron 54 Model Aviation Full-Size Plans Available. See Page 196 TAPERWING 1/2 PYLON RACER / DESIGN BY JOHN HUNTON WITH J E ALBRITTON AUG 87 DRAWN BY HUNTON 87 REAR VIEW SHOWING LOW FRONTAL AREA U w NG RIB TEMPLATE JIG TEMPLATE zz HORIZONTAL STABILIZER B ELEVATOR I/B BALSA RIBS I/IBBALSA JIGS 114 BALSA 412Zff2 BALA BLOCK 000000III __ROD 3/16 DOWEL IItTORGUE ROD ALL FORMERS 1/8 BALSA WING_ANTENNA HOLES _CUTOUTSHEATH QM ROUTENOTE SAND CORNERSSHEETS WIR PUSH ROD ROUND--- B SHEETSDS IINUTPLATE r-iIIRECEIVER IiI PlC tJDEE I/IB PLY-LIILL~~L4II GLASS CLOTH WICYANO Bernie Stuecker launches Dave Beazelys Taperwing during race sponsored Prince Georges RC Club Dave back ground gets ready rip around course JE Aibritton shows off very small frontal area Taperwing design Minimal drag key going fast Next important high-speed stability model excells both January 1989 55 [ NOTE FIN OFFSET RADIO CONTROL SHORT KITS FOR THE SPORT MODELER7 BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LIHE DESIGHED BY THE PROFESSIOHAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WiNG AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER AN INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND PUN TO FLY ViSIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL Phone 81514590417 F4U CORSAIR 56 SPAN44 95 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OP MODEL ENGINEERING THAT IS HARD TO BEAT THEY NAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE A-26 INVADER 68 SPAN 6495 MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZBRO 54 SPAN3750 P-40 TOMAHAWK 55 SPAN3750 p39 AIRACOBRA 55 SPAN3750 P51 D MUSTANG 54 SPAN3750 C203 FOLGORE 56 SPAN3750 FOCKE WUIF 190 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST EE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG epoxy clear Use heat shrink covering wing panels strongly advised se lect colors model very light top equally dark bottom racing perspective con stantly changing must able dis cern immediately whether model up right inverted addition use distinc tive scheme top easy recognition judges Suspend fuel tank foam prevent fuel frothing See plan diagrammatic fuel tank rigging AMA rules event mandates fuel shutoff provided Locating fuel pickup near bottom tank allows model verted flight starve engine fuel good hinging systems avail able simplest approaches cut hinges Mylar drafting sheets Install hinges cyanoacrylate glue CyA sure insert pins secure Finish installing controls servos goldenrod-type pushrod system recom mended elevator actuation Install piece pushrod inner sheath run tenna through tail Install radio gear Check balance point carefully Dont hesitate add ballast necessary obtain good control response comes correctly balanced model Check lateral balance well wing heavy re sult will tendency airplane roll out pylon turn following notes engines propel lers fuels provided co-designer J E Albritton Engines Stock AMA rules tollowed closely use stock engines required ever because variances dimen sions due manufacturing tolerances possible get higher-performance engine trying different combinations pistons cylinders several engines test ing see combination produces best results Work glow plug find highest practical compression ratio removing washers increase com pression still maintains good needle valve insensitivity ease starting Semistock Kustom Kraftsmanship KK sells fine powerful example reason able price engine has dimension ally improved comes fine-thread nee dle valve can purchased drilled venturi pressure-tapped backplate KK engine Taperwing make fine team Modified engines Mild Some clubs allow mild modifications Advanced Transmitter Capabilities Low Cost ATRC STM Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability Fully installed kit Control Systems Laboratoi 238 5 Hiliview Dr Milpitas CA 95035 408 946-4142 Airtrunies Module TSP IM registered trademarks Airtronics Inc A-tracks Works with standard FM/PPM Receivers AirtronicsTht PCM Receivers Convertsthe Module 75PM advanced computerized control system Advanced Technology Radio Control System 56 Model Aviation 9 FOR 40 TO 60 ENGINE 9 FOR 25 TO 50 ENGINES P 38 LIGHTNING 70 SPAN . 7495 PRECISION MODEL PRODUCTS 5Zii~V Made n USA BARSTOCK ALUMINUM SPINNERS Part NoSize 11-150-B .. 1-112 11-175-B .. 1-314 11-200-B T1-225-B .. 2-114 T1-226-B .. 2-114 FAt . TT-250-B . 2-112 TT-251-B .. 2-1/2FAI .. T1-275-B 314 TT-276-B .. 2-3/4 FAt .. TT-300-B TT-301-BFAt TT-325-B .. 3-1/4 TT-350-B .. 3-1/2 TT-375-B .. 3-3/4 TT-400-B RetailApprox PriceWeight S1395058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570ez 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS Part NoSize 1T-140-A.1/4-28 TT-147-A114-28/7mm 1T-610-A.6 x 10mm TT-710-A7x 10mm rT-516-A5/16-24 TT-518-A.5/16-24/8mm TT-810-A. 8 x 10mm TT-825-A.8x 125mm TT-375-A3/8-24 . 1T-125-A10 m RetailApprox PriceWeight S495061oz 495061oz 495 063oz 495082oz 4950760z 495076oz 495076oz 4950 75oz 595 oz 5951 lSoz 3 Pieces Nut Washer atid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 will increase engine reliability mods consist using 72-turn needle valve Kustom Kraftsmanship KK pressure fuel system employs pres sure-tapped backplate also KK Wild An appreciable power increase can achieved drilling venturi %2 mod requires use pressure fuel system Another significant change requires special machining modify transfer ports tapered configuration have limited capability perform some mods Write get details J E Aibritton s address appears end article Propellers Stock The Cox 5 x 3 propeller works best prop has actual pitch over 4 Semistock 434 x 3 Kustom Krafts manship Sorta-stock An Aibritton carbon fiber spe cial prop /2A available limited quantities Write details best prop known us time writing Nonstock Remove re leading edge Cox 5 x 3 sand airfoil back onto top shorten 434 Note For optimal engine performance air propeller should al lows engine exceed 23 OOO rpm ground Fuels Cox racing fuel very hard beat Cox engines particular run well No other brand fuel under-30% nitro recommended Reliability organization Follow acronym KISS Keep Sim ple Stupid Plan what equipment need use same equipment time fly Repetition reliability Flying The Taperwing designed built Pylon Racing flying offi cial pylon course model close turns very tight other kinds flying dont let Taperwing get too far away models very low frontal profile makes difficult see distance nose tends rise dip com pletion turn check position transmitter stickchances pulled straight back smoother faster per formance flying pylon course set con trol throws minimum Kustom Kraftsmanship PO Box 3010 Fallbrook CA 92028 J E Albritton 503 Orrin Dr Vienna VA 22180 THE LEADER IN COMPETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEOTOGIVE MAXIM UM TH RUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQU ES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THPPRtCE 126677/28 1567 136778 14677/8 16 678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPtTCHPRICE 53/34 634 72833456 833/4568 645667 9456677/ 1045667 106W8W 10SEW Ii SW 11 6EW 11/ 67 12 4W 12 SW 12 56 13 56 14 56 15 56 16 4N 16 678 RC PYLON RACING SERIES 500 OtA PtTCHPRICE 75N5N 8/67/z78 SERIES 400C 63/a66777 9777 W WtDE BLADE EW EXTRA WtDE N NARROW January 1989 57
Edition: Model Aviation - 1989/01
Page Numbers: 52, 53, 54, 55, 56, 57
w several years now Pylon Racing circuit has dominated two designs Now theres new name add list its already consistently whip ping planes have led pack long steady stable flight also makes air- nization Notes world-class John H u nton plane easy launch good racing train- CL Team Race competitor J R Aibritton er later article cover maximize FOR THE PYLON RACER wants best RC flier wants get Pylon Racing anyone wants see what Cox Tee Dee can really Taperwing exciting possibility Designed collaboration J E Al britton racer faster GLH smoother Undertaker Thanks its minimal frontal area ta pored wing fuselage single-aileron model achieves 90-plus mph speeds stretch limits standard performance yet still complies AMA rules RC Pylon Racing good test several key facets RC modeling airframe pro pulsion piloting organization value hA subcategoiy sim plifies event makes possible anyone compete Taperwing extends advantage further incorporating con cepts sharpen competitive edge Heres Airframe features lowest possible frontal area within rules wing tapered fuselage well single aileron helps hold up nose airplane entering turn ta pered wing planform improves efficiency turns Incidence twists offsets used greatest aerodynamic efficiency Propulsion getting out engine enhanced See discussion fuels propellers later article Piloting tight Pylon Race course far easier airplane twitchier jumpier model Taperwings elongated configuration gives 52 Model Aviation Contestants Northern Virginal RC Clubs spring 1987 V2A Pylon Race Four Taperwing planlorms visible belong Dave Beazel JE Albritton Clay Hunton earlier version author clubs race August Taperwings won top three places Designer John Hunton Taperwing model model meets requirements AMA Pylon Racing event Clubs Johns area permit crankcase pressure used pit operations increase over reliability taperwing design has gone through iterative development process has two seasons racing behind Although theyre engineered AMA rules shapes proportions model nev ertheless unique Evidence designs inherent stability caine during race Reston VA first heat Taperwing lapping slow er model two collided com plete side horizontal stabilizer el evator Taperwing sheared off flush fuselage half stabi lizer model continued fly did other airplane won race four remaining races AMA rules 1AA racing planes summarized follows Minimum weight20 oz Taperwing can built under 16 oz 20 oz lb nimumwingarea200si sf S Wing root depth% Fuselage width225 Fuselage depth350 following assumptions made calculations Weight z lb r density 38 city Taperwing ph fps rontal area Taperwing si sf rontal area GLH 335 sf rsepower output Tee Dee HPR series calculations can made above information derive gross ap proximation difference perform ance between GLH Taperwing Calculating coefficient drag Cd Taperwing HPR 75 01 Dt x 132/375 Drag T 0284 lb Dt Cd S 284 000238 x 132 x Cd x 157 Cd T 2 Using Cd value GLH g working back drag Dg 000238 x V2 x 00872 x 0233 Dg 241 V now velocity HPR 75 01 00000241V2 V/375 V GLH fps 79 mph calculation shows engine same horsepower output Taperwing will 90 mph GLH will January 1989 53 N7 W5 < Fl - Left The roughed-out wing fuselage components Right plans show wing attachment also another method allows easier access fuel tank Radio installation easy two servos Note foam tape over receiver protect 79 mph simplified calcula tions consider variables thus essentially approximations However actual racing against GLHs Taperwing does seem considerably faster Construction Taperwing simple GLH results worth trouble want compet itive following notes keyed construction sketches Fl Build fuselage crutch directly over plan wax paper Use firm x 1-in balsa crutch crossmembers F2 Cut formers A-in balsa Note doubled formers top fuselage halves part accommo date wing far forward fuse lage divides somewhat discretionary alternate location shown plan However separating fuselage forward leading edge wing will weaken parting leading edge ham pers access fuel tank choice yours suggested plan radio system fuel tank installations pre cut formers will have trimmed out top stringer either very soft in balsa two strips n balsa laminated together F-3 Remove assembly plan assemble bottom formers string ers crutch F-4 Using sanding block sand areas side sheet parts flat except rearmost six eight inches fuselage Use /16 medium-soft balsa sides F-5 Prepare A-in plywood firewall blind nuts Fourmost engine mount glue fuselage Trim sand fuselage prime resand before making wing joint stabilizer mount cutouts After wing cutout made install A-in firm balsa doublers inside lower cutout area dou blers very important continuity strength throughout wing mount area Fourmost engine mount can now trimmed down fitted match fuse lage profile Drill hidden holes mount necessary lighten balance mount delivered factory lit tle heavy kind model W-1 Glue wing plan straight level work surface Cut wing jig parts A-in balsa glue over 4 0 ccUIZL LcZIZ ZZLZ 4i____ zZZzL W 7 UE 7MPU76V II II07 -5LoJ SL~Z / Lz 4 4S77 woil571IISI 7757]GIl1II TAP5MNG K5757 775 MAAW MArL4 Aba. plan Coat jig surfaces soap pre vent adhesion assembled wings jig can reused future wing assemblies W-2 Cut top sheet pieces 1/16 balsa noting top sheet continu ous wing built top down proper dihedral Cut trailing edge pieces length notch Pin parts jig W-3 Cut wing ribs /16 balsa glue place Cut out install four spar gussets Install continuous n tapered block using firm wood across center section Sand assem bly sandpaper board smooth out parts W-4 Cut out install /16 balsa bot tom sheet parts After sanding exposed surfaces smooth apply filament tape shown span sheet joint W-5 Remove wing jig sand surfaces Prime wing center see tion Prepare wing desired ai leron control system continuous aileron will easier notched type efficient plan shows alternate torque rod loca tions Y6-in dowel can used make exposed horn type rod sufficiently rigid will difficult achieve comparable rigidity hidden horn type sure weight opposite wing good lateral balance After mating wing bottom shell fuselage paying very close attention positive incidence setting fuse lage top fairing can joined wing two steps tedious entire assembly careful perform accurately Cut out tailpieces sand smooth airfoil shapes shown Note cross-grained pieces installed tailplane tips Cut out elevator Assemble horizontal vertical tailpieces fuselage Note incidence horizon tal stabilizer offset vertical stabilizer counteracts torque prototypes exposed balsa parts primed nitrate clear dope coated several layers Black Baron 54 Model Aviation Full-Size Plans Available. See Page 196 TAPERWING 1/2 PYLON RACER / DESIGN BY JOHN HUNTON WITH J E ALBRITTON AUG 87 DRAWN BY HUNTON 87 REAR VIEW SHOWING LOW FRONTAL AREA U w NG RIB TEMPLATE JIG TEMPLATE zz HORIZONTAL STABILIZER B ELEVATOR I/B BALSA RIBS I/IBBALSA JIGS 114 BALSA 412Zff2 BALA BLOCK 000000III __ROD 3/16 DOWEL IItTORGUE ROD ALL FORMERS 1/8 BALSA WING_ANTENNA HOLES _CUTOUTSHEATH QM ROUTENOTE SAND CORNERSSHEETS WIR PUSH ROD ROUND--- B SHEETSDS IINUTPLATE r-iIIRECEIVER IiI PlC tJDEE I/IB PLY-LIILL~~L4II GLASS CLOTH WICYANO Bernie Stuecker launches Dave Beazelys Taperwing during race sponsored Prince Georges RC Club Dave back ground gets ready rip around course JE Aibritton shows off very small frontal area Taperwing design Minimal drag key going fast Next important high-speed stability model excells both January 1989 55 [ NOTE FIN OFFSET RADIO CONTROL SHORT KITS FOR THE SPORT MODELER7 BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LIHE DESIGHED BY THE PROFESSIOHAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WiNG AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER AN INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND PUN TO FLY ViSIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL Phone 81514590417 F4U CORSAIR 56 SPAN44 95 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OP MODEL ENGINEERING THAT IS HARD TO BEAT THEY NAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE A-26 INVADER 68 SPAN 6495 MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZBRO 54 SPAN3750 P-40 TOMAHAWK 55 SPAN3750 p39 AIRACOBRA 55 SPAN3750 P51 D MUSTANG 54 SPAN3750 C203 FOLGORE 56 SPAN3750 FOCKE WUIF 190 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST EE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG epoxy clear Use heat shrink covering wing panels strongly advised se lect colors model very light top equally dark bottom racing perspective con stantly changing must able dis cern immediately whether model up right inverted addition use distinc tive scheme top easy recognition judges Suspend fuel tank foam prevent fuel frothing See plan diagrammatic fuel tank rigging AMA rules event mandates fuel shutoff provided Locating fuel pickup near bottom tank allows model verted flight starve engine fuel good hinging systems avail able simplest approaches cut hinges Mylar drafting sheets Install hinges cyanoacrylate glue CyA sure insert pins secure Finish installing controls servos goldenrod-type pushrod system recom mended elevator actuation Install piece pushrod inner sheath run tenna through tail Install radio gear Check balance point carefully Dont hesitate add ballast necessary obtain good control response comes correctly balanced model Check lateral balance well wing heavy re sult will tendency airplane roll out pylon turn following notes engines propel lers fuels provided co-designer J E Albritton Engines Stock AMA rules tollowed closely use stock engines required ever because variances dimen sions due manufacturing tolerances possible get higher-performance engine trying different combinations pistons cylinders several engines test ing see combination produces best results Work glow plug find highest practical compression ratio removing washers increase com pression still maintains good needle valve insensitivity ease starting Semistock Kustom Kraftsmanship KK sells fine powerful example reason able price engine has dimension ally improved comes fine-thread nee dle valve can purchased drilled venturi pressure-tapped backplate KK engine Taperwing make fine team Modified engines Mild Some clubs allow mild modifications Advanced Transmitter Capabilities Low Cost ATRC STM Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability Fully installed kit Control Systems Laboratoi 238 5 Hiliview Dr Milpitas CA 95035 408 946-4142 Airtrunies Module TSP IM registered trademarks Airtronics Inc A-tracks Works with standard FM/PPM Receivers AirtronicsTht PCM Receivers Convertsthe Module 75PM advanced computerized control system Advanced Technology Radio Control System 56 Model Aviation 9 FOR 40 TO 60 ENGINE 9 FOR 25 TO 50 ENGINES P 38 LIGHTNING 70 SPAN . 7495 PRECISION MODEL PRODUCTS 5Zii~V Made n USA BARSTOCK ALUMINUM SPINNERS Part NoSize 11-150-B .. 1-112 11-175-B .. 1-314 11-200-B T1-225-B .. 2-114 T1-226-B .. 2-114 FAt . TT-250-B . 2-112 TT-251-B .. 2-1/2FAI .. T1-275-B 314 TT-276-B .. 2-3/4 FAt .. TT-300-B TT-301-BFAt TT-325-B .. 3-1/4 TT-350-B .. 3-1/2 TT-375-B .. 3-3/4 TT-400-B RetailApprox PriceWeight S1395058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570ez 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS Part NoSize 1T-140-A.1/4-28 TT-147-A114-28/7mm 1T-610-A.6 x 10mm TT-710-A7x 10mm rT-516-A5/16-24 TT-518-A.5/16-24/8mm TT-810-A. 8 x 10mm TT-825-A.8x 125mm TT-375-A3/8-24 . 1T-125-A10 m RetailApprox PriceWeight S495061oz 495061oz 495 063oz 495082oz 4950760z 495076oz 495076oz 4950 75oz 595 oz 5951 lSoz 3 Pieces Nut Washer atid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 will increase engine reliability mods consist using 72-turn needle valve Kustom Kraftsmanship KK pressure fuel system employs pres sure-tapped backplate also KK Wild An appreciable power increase can achieved drilling venturi %2 mod requires use pressure fuel system Another significant change requires special machining modify transfer ports tapered configuration have limited capability perform some mods Write get details J E Aibritton s address appears end article Propellers Stock The Cox 5 x 3 propeller works best prop has actual pitch over 4 Semistock 434 x 3 Kustom Krafts manship Sorta-stock An Aibritton carbon fiber spe cial prop /2A available limited quantities Write details best prop known us time writing Nonstock Remove re leading edge Cox 5 x 3 sand airfoil back onto top shorten 434 Note For optimal engine performance air propeller should al lows engine exceed 23 OOO rpm ground Fuels Cox racing fuel very hard beat Cox engines particular run well No other brand fuel under-30% nitro recommended Reliability organization Follow acronym KISS Keep Sim ple Stupid Plan what equipment need use same equipment time fly Repetition reliability Flying The Taperwing designed built Pylon Racing flying offi cial pylon course model close turns very tight other kinds flying dont let Taperwing get too far away models very low frontal profile makes difficult see distance nose tends rise dip com pletion turn check position transmitter stickchances pulled straight back smoother faster per formance flying pylon course set con trol throws minimum Kustom Kraftsmanship PO Box 3010 Fallbrook CA 92028 J E Albritton 503 Orrin Dr Vienna VA 22180 THE LEADER IN COMPETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEOTOGIVE MAXIM UM TH RUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQU ES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THPPRtCE 126677/28 1567 136778 14677/8 16 678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPtTCHPRICE 53/34 634 72833456 833/4568 645667 9456677/ 1045667 106W8W 10SEW Ii SW 11 6EW 11/ 67 12 4W 12 SW 12 56 13 56 14 56 15 56 16 4N 16 678 RC PYLON RACING SERIES 500 OtA PtTCHPRICE 75N5N 8/67/z78 SERIES 400C 63/a66777 9777 W WtDE BLADE EW EXTRA WtDE N NARROW January 1989 57
Edition: Model Aviation - 1989/01
Page Numbers: 52, 53, 54, 55, 56, 57
w several years now Pylon Racing circuit has dominated two designs Now theres new name add list its already consistently whip ping planes have led pack long steady stable flight also makes air- nization Notes world-class John H u nton plane easy launch good racing train- CL Team Race competitor J R Aibritton er later article cover maximize FOR THE PYLON RACER wants best RC flier wants get Pylon Racing anyone wants see what Cox Tee Dee can really Taperwing exciting possibility Designed collaboration J E Al britton racer faster GLH smoother Undertaker Thanks its minimal frontal area ta pored wing fuselage single-aileron model achieves 90-plus mph speeds stretch limits standard performance yet still complies AMA rules RC Pylon Racing good test several key facets RC modeling airframe pro pulsion piloting organization value hA subcategoiy sim plifies event makes possible anyone compete Taperwing extends advantage further incorporating con cepts sharpen competitive edge Heres Airframe features lowest possible frontal area within rules wing tapered fuselage well single aileron helps hold up nose airplane entering turn ta pered wing planform improves efficiency turns Incidence twists offsets used greatest aerodynamic efficiency Propulsion getting out engine enhanced See discussion fuels propellers later article Piloting tight Pylon Race course far easier airplane twitchier jumpier model Taperwings elongated configuration gives 52 Model Aviation Contestants Northern Virginal RC Clubs spring 1987 V2A Pylon Race Four Taperwing planlorms visible belong Dave Beazel JE Albritton Clay Hunton earlier version author clubs race August Taperwings won top three places Designer John Hunton Taperwing model model meets requirements AMA Pylon Racing event Clubs Johns area permit crankcase pressure used pit operations increase over reliability taperwing design has gone through iterative development process has two seasons racing behind Although theyre engineered AMA rules shapes proportions model nev ertheless unique Evidence designs inherent stability caine during race Reston VA first heat Taperwing lapping slow er model two collided com plete side horizontal stabilizer el evator Taperwing sheared off flush fuselage half stabi lizer model continued fly did other airplane won race four remaining races AMA rules 1AA racing planes summarized follows Minimum weight20 oz Taperwing can built under 16 oz 20 oz lb nimumwingarea200si sf S Wing root depth% Fuselage width225 Fuselage depth350 following assumptions made calculations Weight z lb r density 38 city Taperwing ph fps rontal area Taperwing si sf rontal area GLH 335 sf rsepower output Tee Dee HPR series calculations can made above information derive gross ap proximation difference perform ance between GLH Taperwing Calculating coefficient drag Cd Taperwing HPR 75 01 Dt x 132/375 Drag T 0284 lb Dt Cd S 284 000238 x 132 x Cd x 157 Cd T 2 Using Cd value GLH g working back drag Dg 000238 x V2 x 00872 x 0233 Dg 241 V now velocity HPR 75 01 00000241V2 V/375 V GLH fps 79 mph calculation shows engine same horsepower output Taperwing will 90 mph GLH will January 1989 53 N7 W5 < Fl - Left The roughed-out wing fuselage components Right plans show wing attachment also another method allows easier access fuel tank Radio installation easy two servos Note foam tape over receiver protect 79 mph simplified calcula tions consider variables thus essentially approximations However actual racing against GLHs Taperwing does seem considerably faster Construction Taperwing simple GLH results worth trouble want compet itive following notes keyed construction sketches Fl Build fuselage crutch directly over plan wax paper Use firm x 1-in balsa crutch crossmembers F2 Cut formers A-in balsa Note doubled formers top fuselage halves part accommo date wing far forward fuse lage divides somewhat discretionary alternate location shown plan However separating fuselage forward leading edge wing will weaken parting leading edge ham pers access fuel tank choice yours suggested plan radio system fuel tank installations pre cut formers will have trimmed out top stringer either very soft in balsa two strips n balsa laminated together F-3 Remove assembly plan assemble bottom formers string ers crutch F-4 Using sanding block sand areas side sheet parts flat except rearmost six eight inches fuselage Use /16 medium-soft balsa sides F-5 Prepare A-in plywood firewall blind nuts Fourmost engine mount glue fuselage Trim sand fuselage prime resand before making wing joint stabilizer mount cutouts After wing cutout made install A-in firm balsa doublers inside lower cutout area dou blers very important continuity strength throughout wing mount area Fourmost engine mount can now trimmed down fitted match fuse lage profile Drill hidden holes mount necessary lighten balance mount delivered factory lit tle heavy kind model W-1 Glue wing plan straight level work surface Cut wing jig parts A-in balsa glue over 4 0 ccUIZL LcZIZ ZZLZ 4i____ zZZzL W 7 UE 7MPU76V II II07 -5LoJ SL~Z / Lz 4 4S77 woil571IISI 7757]GIl1II TAP5MNG K5757 775 MAAW MArL4 Aba. plan Coat jig surfaces soap pre vent adhesion assembled wings jig can reused future wing assemblies W-2 Cut top sheet pieces 1/16 balsa noting top sheet continu ous wing built top down proper dihedral Cut trailing edge pieces length notch Pin parts jig W-3 Cut wing ribs /16 balsa glue place Cut out install four spar gussets Install continuous n tapered block using firm wood across center section Sand assem bly sandpaper board smooth out parts W-4 Cut out install /16 balsa bot tom sheet parts After sanding exposed surfaces smooth apply filament tape shown span sheet joint W-5 Remove wing jig sand surfaces Prime wing center see tion Prepare wing desired ai leron control system continuous aileron will easier notched type efficient plan shows alternate torque rod loca tions Y6-in dowel can used make exposed horn type rod sufficiently rigid will difficult achieve comparable rigidity hidden horn type sure weight opposite wing good lateral balance After mating wing bottom shell fuselage paying very close attention positive incidence setting fuse lage top fairing can joined wing two steps tedious entire assembly careful perform accurately Cut out tailpieces sand smooth airfoil shapes shown Note cross-grained pieces installed tailplane tips Cut out elevator Assemble horizontal vertical tailpieces fuselage Note incidence horizon tal stabilizer offset vertical stabilizer counteracts torque prototypes exposed balsa parts primed nitrate clear dope coated several layers Black Baron 54 Model Aviation Full-Size Plans Available. See Page 196 TAPERWING 1/2 PYLON RACER / DESIGN BY JOHN HUNTON WITH J E ALBRITTON AUG 87 DRAWN BY HUNTON 87 REAR VIEW SHOWING LOW FRONTAL AREA U w NG RIB TEMPLATE JIG TEMPLATE zz HORIZONTAL STABILIZER B ELEVATOR I/B BALSA RIBS I/IBBALSA JIGS 114 BALSA 412Zff2 BALA BLOCK 000000III __ROD 3/16 DOWEL IItTORGUE ROD ALL FORMERS 1/8 BALSA WING_ANTENNA HOLES _CUTOUTSHEATH QM ROUTENOTE SAND CORNERSSHEETS WIR PUSH ROD ROUND--- B SHEETSDS IINUTPLATE r-iIIRECEIVER IiI PlC tJDEE I/IB PLY-LIILL~~L4II GLASS CLOTH WICYANO Bernie Stuecker launches Dave Beazelys Taperwing during race sponsored Prince Georges RC Club Dave back ground gets ready rip around course JE Aibritton shows off very small frontal area Taperwing design Minimal drag key going fast Next important high-speed stability model excells both January 1989 55 [ NOTE FIN OFFSET RADIO CONTROL SHORT KITS FOR THE SPORT MODELER7 BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LIHE DESIGHED BY THE PROFESSIOHAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WiNG AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER AN INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND PUN TO FLY ViSIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL Phone 81514590417 F4U CORSAIR 56 SPAN44 95 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OP MODEL ENGINEERING THAT IS HARD TO BEAT THEY NAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE A-26 INVADER 68 SPAN 6495 MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZBRO 54 SPAN3750 P-40 TOMAHAWK 55 SPAN3750 p39 AIRACOBRA 55 SPAN3750 P51 D MUSTANG 54 SPAN3750 C203 FOLGORE 56 SPAN3750 FOCKE WUIF 190 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST EE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG epoxy clear Use heat shrink covering wing panels strongly advised se lect colors model very light top equally dark bottom racing perspective con stantly changing must able dis cern immediately whether model up right inverted addition use distinc tive scheme top easy recognition judges Suspend fuel tank foam prevent fuel frothing See plan diagrammatic fuel tank rigging AMA rules event mandates fuel shutoff provided Locating fuel pickup near bottom tank allows model verted flight starve engine fuel good hinging systems avail able simplest approaches cut hinges Mylar drafting sheets Install hinges cyanoacrylate glue CyA sure insert pins secure Finish installing controls servos goldenrod-type pushrod system recom mended elevator actuation Install piece pushrod inner sheath run tenna through tail Install radio gear Check balance point carefully Dont hesitate add ballast necessary obtain good control response comes correctly balanced model Check lateral balance well wing heavy re sult will tendency airplane roll out pylon turn following notes engines propel lers fuels provided co-designer J E Albritton Engines Stock AMA rules tollowed closely use stock engines required ever because variances dimen sions due manufacturing tolerances possible get higher-performance engine trying different combinations pistons cylinders several engines test ing see combination produces best results Work glow plug find highest practical compression ratio removing washers increase com pression still maintains good needle valve insensitivity ease starting Semistock Kustom Kraftsmanship KK sells fine powerful example reason able price engine has dimension ally improved comes fine-thread nee dle valve can purchased drilled venturi pressure-tapped backplate KK engine Taperwing make fine team Modified engines Mild Some clubs allow mild modifications Advanced Transmitter Capabilities Low Cost ATRC STM Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability Fully installed kit Control Systems Laboratoi 238 5 Hiliview Dr Milpitas CA 95035 408 946-4142 Airtrunies Module TSP IM registered trademarks Airtronics Inc A-tracks Works with standard FM/PPM Receivers AirtronicsTht PCM Receivers Convertsthe Module 75PM advanced computerized control system Advanced Technology Radio Control System 56 Model Aviation 9 FOR 40 TO 60 ENGINE 9 FOR 25 TO 50 ENGINES P 38 LIGHTNING 70 SPAN . 7495 PRECISION MODEL PRODUCTS 5Zii~V Made n USA BARSTOCK ALUMINUM SPINNERS Part NoSize 11-150-B .. 1-112 11-175-B .. 1-314 11-200-B T1-225-B .. 2-114 T1-226-B .. 2-114 FAt . TT-250-B . 2-112 TT-251-B .. 2-1/2FAI .. T1-275-B 314 TT-276-B .. 2-3/4 FAt .. TT-300-B TT-301-BFAt TT-325-B .. 3-1/4 TT-350-B .. 3-1/2 TT-375-B .. 3-3/4 TT-400-B RetailApprox PriceWeight S1395058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570ez 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS Part NoSize 1T-140-A.1/4-28 TT-147-A114-28/7mm 1T-610-A.6 x 10mm TT-710-A7x 10mm rT-516-A5/16-24 TT-518-A.5/16-24/8mm TT-810-A. 8 x 10mm TT-825-A.8x 125mm TT-375-A3/8-24 . 1T-125-A10 m RetailApprox PriceWeight S495061oz 495061oz 495 063oz 495082oz 4950760z 495076oz 495076oz 4950 75oz 595 oz 5951 lSoz 3 Pieces Nut Washer atid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 will increase engine reliability mods consist using 72-turn needle valve Kustom Kraftsmanship KK pressure fuel system employs pres sure-tapped backplate also KK Wild An appreciable power increase can achieved drilling venturi %2 mod requires use pressure fuel system Another significant change requires special machining modify transfer ports tapered configuration have limited capability perform some mods Write get details J E Aibritton s address appears end article Propellers Stock The Cox 5 x 3 propeller works best prop has actual pitch over 4 Semistock 434 x 3 Kustom Krafts manship Sorta-stock An Aibritton carbon fiber spe cial prop /2A available limited quantities Write details best prop known us time writing Nonstock Remove re leading edge Cox 5 x 3 sand airfoil back onto top shorten 434 Note For optimal engine performance air propeller should al lows engine exceed 23 OOO rpm ground Fuels Cox racing fuel very hard beat Cox engines particular run well No other brand fuel under-30% nitro recommended Reliability organization Follow acronym KISS Keep Sim ple Stupid Plan what equipment need use same equipment time fly Repetition reliability Flying The Taperwing designed built Pylon Racing flying offi cial pylon course model close turns very tight other kinds flying dont let Taperwing get too far away models very low frontal profile makes difficult see distance nose tends rise dip com pletion turn check position transmitter stickchances pulled straight back smoother faster per formance flying pylon course set con trol throws minimum Kustom Kraftsmanship PO Box 3010 Fallbrook CA 92028 J E Albritton 503 Orrin Dr Vienna VA 22180 THE LEADER IN COMPETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEOTOGIVE MAXIM UM TH RUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQU ES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THPPRtCE 126677/28 1567 136778 14677/8 16 678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPtTCHPRICE 53/34 634 72833456 833/4568 645667 9456677/ 1045667 106W8W 10SEW Ii SW 11 6EW 11/ 67 12 4W 12 SW 12 56 13 56 14 56 15 56 16 4N 16 678 RC PYLON RACING SERIES 500 OtA PtTCHPRICE 75N5N 8/67/z78 SERIES 400C 63/a66777 9777 W WtDE BLADE EW EXTRA WtDE N NARROW January 1989 57
Edition: Model Aviation - 1989/01
Page Numbers: 52, 53, 54, 55, 56, 57
w several years now Pylon Racing circuit has dominated two designs Now theres new name add list its already consistently whip ping planes have led pack long steady stable flight also makes air- nization Notes world-class John H u nton plane easy launch good racing train- CL Team Race competitor J R Aibritton er later article cover maximize FOR THE PYLON RACER wants best RC flier wants get Pylon Racing anyone wants see what Cox Tee Dee can really Taperwing exciting possibility Designed collaboration J E Al britton racer faster GLH smoother Undertaker Thanks its minimal frontal area ta pored wing fuselage single-aileron model achieves 90-plus mph speeds stretch limits standard performance yet still complies AMA rules RC Pylon Racing good test several key facets RC modeling airframe pro pulsion piloting organization value hA subcategoiy sim plifies event makes possible anyone compete Taperwing extends advantage further incorporating con cepts sharpen competitive edge Heres Airframe features lowest possible frontal area within rules wing tapered fuselage well single aileron helps hold up nose airplane entering turn ta pered wing planform improves efficiency turns Incidence twists offsets used greatest aerodynamic efficiency Propulsion getting out engine enhanced See discussion fuels propellers later article Piloting tight Pylon Race course far easier airplane twitchier jumpier model Taperwings elongated configuration gives 52 Model Aviation Contestants Northern Virginal RC Clubs spring 1987 V2A Pylon Race Four Taperwing planlorms visible belong Dave Beazel JE Albritton Clay Hunton earlier version author clubs race August Taperwings won top three places Designer John Hunton Taperwing model model meets requirements AMA Pylon Racing event Clubs Johns area permit crankcase pressure used pit operations increase over reliability taperwing design has gone through iterative development process has two seasons racing behind Although theyre engineered AMA rules shapes proportions model nev ertheless unique Evidence designs inherent stability caine during race Reston VA first heat Taperwing lapping slow er model two collided com plete side horizontal stabilizer el evator Taperwing sheared off flush fuselage half stabi lizer model continued fly did other airplane won race four remaining races AMA rules 1AA racing planes summarized follows Minimum weight20 oz Taperwing can built under 16 oz 20 oz lb nimumwingarea200si sf S Wing root depth% Fuselage width225 Fuselage depth350 following assumptions made calculations Weight z lb r density 38 city Taperwing ph fps rontal area Taperwing si sf rontal area GLH 335 sf rsepower output Tee Dee HPR series calculations can made above information derive gross ap proximation difference perform ance between GLH Taperwing Calculating coefficient drag Cd Taperwing HPR 75 01 Dt x 132/375 Drag T 0284 lb Dt Cd S 284 000238 x 132 x Cd x 157 Cd T 2 Using Cd value GLH g working back drag Dg 000238 x V2 x 00872 x 0233 Dg 241 V now velocity HPR 75 01 00000241V2 V/375 V GLH fps 79 mph calculation shows engine same horsepower output Taperwing will 90 mph GLH will January 1989 53 N7 W5 < Fl - Left The roughed-out wing fuselage components Right plans show wing attachment also another method allows easier access fuel tank Radio installation easy two servos Note foam tape over receiver protect 79 mph simplified calcula tions consider variables thus essentially approximations However actual racing against GLHs Taperwing does seem considerably faster Construction Taperwing simple GLH results worth trouble want compet itive following notes keyed construction sketches Fl Build fuselage crutch directly over plan wax paper Use firm x 1-in balsa crutch crossmembers F2 Cut formers A-in balsa Note doubled formers top fuselage halves part accommo date wing far forward fuse lage divides somewhat discretionary alternate location shown plan However separating fuselage forward leading edge wing will weaken parting leading edge ham pers access fuel tank choice yours suggested plan radio system fuel tank installations pre cut formers will have trimmed out top stringer either very soft in balsa two strips n balsa laminated together F-3 Remove assembly plan assemble bottom formers string ers crutch F-4 Using sanding block sand areas side sheet parts flat except rearmost six eight inches fuselage Use /16 medium-soft balsa sides F-5 Prepare A-in plywood firewall blind nuts Fourmost engine mount glue fuselage Trim sand fuselage prime resand before making wing joint stabilizer mount cutouts After wing cutout made install A-in firm balsa doublers inside lower cutout area dou blers very important continuity strength throughout wing mount area Fourmost engine mount can now trimmed down fitted match fuse lage profile Drill hidden holes mount necessary lighten balance mount delivered factory lit tle heavy kind model W-1 Glue wing plan straight level work surface Cut wing jig parts A-in balsa glue over 4 0 ccUIZL LcZIZ ZZLZ 4i____ zZZzL W 7 UE 7MPU76V II II07 -5LoJ SL~Z / Lz 4 4S77 woil571IISI 7757]GIl1II TAP5MNG K5757 775 MAAW MArL4 Aba. plan Coat jig surfaces soap pre vent adhesion assembled wings jig can reused future wing assemblies W-2 Cut top sheet pieces 1/16 balsa noting top sheet continu ous wing built top down proper dihedral Cut trailing edge pieces length notch Pin parts jig W-3 Cut wing ribs /16 balsa glue place Cut out install four spar gussets Install continuous n tapered block using firm wood across center section Sand assem bly sandpaper board smooth out parts W-4 Cut out install /16 balsa bot tom sheet parts After sanding exposed surfaces smooth apply filament tape shown span sheet joint W-5 Remove wing jig sand surfaces Prime wing center see tion Prepare wing desired ai leron control system continuous aileron will easier notched type efficient plan shows alternate torque rod loca tions Y6-in dowel can used make exposed horn type rod sufficiently rigid will difficult achieve comparable rigidity hidden horn type sure weight opposite wing good lateral balance After mating wing bottom shell fuselage paying very close attention positive incidence setting fuse lage top fairing can joined wing two steps tedious entire assembly careful perform accurately Cut out tailpieces sand smooth airfoil shapes shown Note cross-grained pieces installed tailplane tips Cut out elevator Assemble horizontal vertical tailpieces fuselage Note incidence horizon tal stabilizer offset vertical stabilizer counteracts torque prototypes exposed balsa parts primed nitrate clear dope coated several layers Black Baron 54 Model Aviation Full-Size Plans Available. See Page 196 TAPERWING 1/2 PYLON RACER / DESIGN BY JOHN HUNTON WITH J E ALBRITTON AUG 87 DRAWN BY HUNTON 87 REAR VIEW SHOWING LOW FRONTAL AREA U w NG RIB TEMPLATE JIG TEMPLATE zz HORIZONTAL STABILIZER B ELEVATOR I/B BALSA RIBS I/IBBALSA JIGS 114 BALSA 412Zff2 BALA BLOCK 000000III __ROD 3/16 DOWEL IItTORGUE ROD ALL FORMERS 1/8 BALSA WING_ANTENNA HOLES _CUTOUTSHEATH QM ROUTENOTE SAND CORNERSSHEETS WIR PUSH ROD ROUND--- B SHEETSDS IINUTPLATE r-iIIRECEIVER IiI PlC tJDEE I/IB PLY-LIILL~~L4II GLASS CLOTH WICYANO Bernie Stuecker launches Dave Beazelys Taperwing during race sponsored Prince Georges RC Club Dave back ground gets ready rip around course JE Aibritton shows off very small frontal area Taperwing design Minimal drag key going fast Next important high-speed stability model excells both January 1989 55 [ NOTE FIN OFFSET RADIO CONTROL SHORT KITS FOR THE SPORT MODELER7 BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LIHE DESIGHED BY THE PROFESSIOHAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WiNG AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER AN INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND PUN TO FLY ViSIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL Phone 81514590417 F4U CORSAIR 56 SPAN44 95 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OP MODEL ENGINEERING THAT IS HARD TO BEAT THEY NAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE A-26 INVADER 68 SPAN 6495 MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZBRO 54 SPAN3750 P-40 TOMAHAWK 55 SPAN3750 p39 AIRACOBRA 55 SPAN3750 P51 D MUSTANG 54 SPAN3750 C203 FOLGORE 56 SPAN3750 FOCKE WUIF 190 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST EE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG epoxy clear Use heat shrink covering wing panels strongly advised se lect colors model very light top equally dark bottom racing perspective con stantly changing must able dis cern immediately whether model up right inverted addition use distinc tive scheme top easy recognition judges Suspend fuel tank foam prevent fuel frothing See plan diagrammatic fuel tank rigging AMA rules event mandates fuel shutoff provided Locating fuel pickup near bottom tank allows model verted flight starve engine fuel good hinging systems avail able simplest approaches cut hinges Mylar drafting sheets Install hinges cyanoacrylate glue CyA sure insert pins secure Finish installing controls servos goldenrod-type pushrod system recom mended elevator actuation Install piece pushrod inner sheath run tenna through tail Install radio gear Check balance point carefully Dont hesitate add ballast necessary obtain good control response comes correctly balanced model Check lateral balance well wing heavy re sult will tendency airplane roll out pylon turn following notes engines propel lers fuels provided co-designer J E Albritton Engines Stock AMA rules tollowed closely use stock engines required ever because variances dimen sions due manufacturing tolerances possible get higher-performance engine trying different combinations pistons cylinders several engines test ing see combination produces best results Work glow plug find highest practical compression ratio removing washers increase com pression still maintains good needle valve insensitivity ease starting Semistock Kustom Kraftsmanship KK sells fine powerful example reason able price engine has dimension ally improved comes fine-thread nee dle valve can purchased drilled venturi pressure-tapped backplate KK engine Taperwing make fine team Modified engines Mild Some clubs allow mild modifications Advanced Transmitter Capabilities Low Cost ATRC STM Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability Fully installed kit Control Systems Laboratoi 238 5 Hiliview Dr Milpitas CA 95035 408 946-4142 Airtrunies Module TSP IM registered trademarks Airtronics Inc A-tracks Works with standard FM/PPM Receivers AirtronicsTht PCM Receivers Convertsthe Module 75PM advanced computerized control system Advanced Technology Radio Control System 56 Model Aviation 9 FOR 40 TO 60 ENGINE 9 FOR 25 TO 50 ENGINES P 38 LIGHTNING 70 SPAN . 7495 PRECISION MODEL PRODUCTS 5Zii~V Made n USA BARSTOCK ALUMINUM SPINNERS Part NoSize 11-150-B .. 1-112 11-175-B .. 1-314 11-200-B T1-225-B .. 2-114 T1-226-B .. 2-114 FAt . TT-250-B . 2-112 TT-251-B .. 2-1/2FAI .. T1-275-B 314 TT-276-B .. 2-3/4 FAt .. TT-300-B TT-301-BFAt TT-325-B .. 3-1/4 TT-350-B .. 3-1/2 TT-375-B .. 3-3/4 TT-400-B RetailApprox PriceWeight S1395058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570ez 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS Part NoSize 1T-140-A.1/4-28 TT-147-A114-28/7mm 1T-610-A.6 x 10mm TT-710-A7x 10mm rT-516-A5/16-24 TT-518-A.5/16-24/8mm TT-810-A. 8 x 10mm TT-825-A.8x 125mm TT-375-A3/8-24 . 1T-125-A10 m RetailApprox PriceWeight S495061oz 495061oz 495 063oz 495082oz 4950760z 495076oz 495076oz 4950 75oz 595 oz 5951 lSoz 3 Pieces Nut Washer atid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 will increase engine reliability mods consist using 72-turn needle valve Kustom Kraftsmanship KK pressure fuel system employs pres sure-tapped backplate also KK Wild An appreciable power increase can achieved drilling venturi %2 mod requires use pressure fuel system Another significant change requires special machining modify transfer ports tapered configuration have limited capability perform some mods Write get details J E Aibritton s address appears end article Propellers Stock The Cox 5 x 3 propeller works best prop has actual pitch over 4 Semistock 434 x 3 Kustom Krafts manship Sorta-stock An Aibritton carbon fiber spe cial prop /2A available limited quantities Write details best prop known us time writing Nonstock Remove re leading edge Cox 5 x 3 sand airfoil back onto top shorten 434 Note For optimal engine performance air propeller should al lows engine exceed 23 OOO rpm ground Fuels Cox racing fuel very hard beat Cox engines particular run well No other brand fuel under-30% nitro recommended Reliability organization Follow acronym KISS Keep Sim ple Stupid Plan what equipment need use same equipment time fly Repetition reliability Flying The Taperwing designed built Pylon Racing flying offi cial pylon course model close turns very tight other kinds flying dont let Taperwing get too far away models very low frontal profile makes difficult see distance nose tends rise dip com pletion turn check position transmitter stickchances pulled straight back smoother faster per formance flying pylon course set con trol throws minimum Kustom Kraftsmanship PO Box 3010 Fallbrook CA 92028 J E Albritton 503 Orrin Dr Vienna VA 22180 THE LEADER IN COMPETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEOTOGIVE MAXIM UM TH RUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQU ES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THPPRtCE 126677/28 1567 136778 14677/8 16 678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPtTCHPRICE 53/34 634 72833456 833/4568 645667 9456677/ 1045667 106W8W 10SEW Ii SW 11 6EW 11/ 67 12 4W 12 SW 12 56 13 56 14 56 15 56 16 4N 16 678 RC PYLON RACING SERIES 500 OtA PtTCHPRICE 75N5N 8/67/z78 SERIES 400C 63/a66777 9777 W WtDE BLADE EW EXTRA WtDE N NARROW January 1989 57
Edition: Model Aviation - 1989/01
Page Numbers: 52, 53, 54, 55, 56, 57
w several years now Pylon Racing circuit has dominated two designs Now theres new name add list its already consistently whip ping planes have led pack long steady stable flight also makes air- nization Notes world-class John H u nton plane easy launch good racing train- CL Team Race competitor J R Aibritton er later article cover maximize FOR THE PYLON RACER wants best RC flier wants get Pylon Racing anyone wants see what Cox Tee Dee can really Taperwing exciting possibility Designed collaboration J E Al britton racer faster GLH smoother Undertaker Thanks its minimal frontal area ta pored wing fuselage single-aileron model achieves 90-plus mph speeds stretch limits standard performance yet still complies AMA rules RC Pylon Racing good test several key facets RC modeling airframe pro pulsion piloting organization value hA subcategoiy sim plifies event makes possible anyone compete Taperwing extends advantage further incorporating con cepts sharpen competitive edge Heres Airframe features lowest possible frontal area within rules wing tapered fuselage well single aileron helps hold up nose airplane entering turn ta pered wing planform improves efficiency turns Incidence twists offsets used greatest aerodynamic efficiency Propulsion getting out engine enhanced See discussion fuels propellers later article Piloting tight Pylon Race course far easier airplane twitchier jumpier model Taperwings elongated configuration gives 52 Model Aviation Contestants Northern Virginal RC Clubs spring 1987 V2A Pylon Race Four Taperwing planlorms visible belong Dave Beazel JE Albritton Clay Hunton earlier version author clubs race August Taperwings won top three places Designer John Hunton Taperwing model model meets requirements AMA Pylon Racing event Clubs Johns area permit crankcase pressure used pit operations increase over reliability taperwing design has gone through iterative development process has two seasons racing behind Although theyre engineered AMA rules shapes proportions model nev ertheless unique Evidence designs inherent stability caine during race Reston VA first heat Taperwing lapping slow er model two collided com plete side horizontal stabilizer el evator Taperwing sheared off flush fuselage half stabi lizer model continued fly did other airplane won race four remaining races AMA rules 1AA racing planes summarized follows Minimum weight20 oz Taperwing can built under 16 oz 20 oz lb nimumwingarea200si sf S Wing root depth% Fuselage width225 Fuselage depth350 following assumptions made calculations Weight z lb r density 38 city Taperwing ph fps rontal area Taperwing si sf rontal area GLH 335 sf rsepower output Tee Dee HPR series calculations can made above information derive gross ap proximation difference perform ance between GLH Taperwing Calculating coefficient drag Cd Taperwing HPR 75 01 Dt x 132/375 Drag T 0284 lb Dt Cd S 284 000238 x 132 x Cd x 157 Cd T 2 Using Cd value GLH g working back drag Dg 000238 x V2 x 00872 x 0233 Dg 241 V now velocity HPR 75 01 00000241V2 V/375 V GLH fps 79 mph calculation shows engine same horsepower output Taperwing will 90 mph GLH will January 1989 53 N7 W5 < Fl - Left The roughed-out wing fuselage components Right plans show wing attachment also another method allows easier access fuel tank Radio installation easy two servos Note foam tape over receiver protect 79 mph simplified calcula tions consider variables thus essentially approximations However actual racing against GLHs Taperwing does seem considerably faster Construction Taperwing simple GLH results worth trouble want compet itive following notes keyed construction sketches Fl Build fuselage crutch directly over plan wax paper Use firm x 1-in balsa crutch crossmembers F2 Cut formers A-in balsa Note doubled formers top fuselage halves part accommo date wing far forward fuse lage divides somewhat discretionary alternate location shown plan However separating fuselage forward leading edge wing will weaken parting leading edge ham pers access fuel tank choice yours suggested plan radio system fuel tank installations pre cut formers will have trimmed out top stringer either very soft in balsa two strips n balsa laminated together F-3 Remove assembly plan assemble bottom formers string ers crutch F-4 Using sanding block sand areas side sheet parts flat except rearmost six eight inches fuselage Use /16 medium-soft balsa sides F-5 Prepare A-in plywood firewall blind nuts Fourmost engine mount glue fuselage Trim sand fuselage prime resand before making wing joint stabilizer mount cutouts After wing cutout made install A-in firm balsa doublers inside lower cutout area dou blers very important continuity strength throughout wing mount area Fourmost engine mount can now trimmed down fitted match fuse lage profile Drill hidden holes mount necessary lighten balance mount delivered factory lit tle heavy kind model W-1 Glue wing plan straight level work surface Cut wing jig parts A-in balsa glue over 4 0 ccUIZL LcZIZ ZZLZ 4i____ zZZzL W 7 UE 7MPU76V II II07 -5LoJ SL~Z / Lz 4 4S77 woil571IISI 7757]GIl1II TAP5MNG K5757 775 MAAW MArL4 Aba. plan Coat jig surfaces soap pre vent adhesion assembled wings jig can reused future wing assemblies W-2 Cut top sheet pieces 1/16 balsa noting top sheet continu ous wing built top down proper dihedral Cut trailing edge pieces length notch Pin parts jig W-3 Cut wing ribs /16 balsa glue place Cut out install four spar gussets Install continuous n tapered block using firm wood across center section Sand assem bly sandpaper board smooth out parts W-4 Cut out install /16 balsa bot tom sheet parts After sanding exposed surfaces smooth apply filament tape shown span sheet joint W-5 Remove wing jig sand surfaces Prime wing center see tion Prepare wing desired ai leron control system continuous aileron will easier notched type efficient plan shows alternate torque rod loca tions Y6-in dowel can used make exposed horn type rod sufficiently rigid will difficult achieve comparable rigidity hidden horn type sure weight opposite wing good lateral balance After mating wing bottom shell fuselage paying very close attention positive incidence setting fuse lage top fairing can joined wing two steps tedious entire assembly careful perform accurately Cut out tailpieces sand smooth airfoil shapes shown Note cross-grained pieces installed tailplane tips Cut out elevator Assemble horizontal vertical tailpieces fuselage Note incidence horizon tal stabilizer offset vertical stabilizer counteracts torque prototypes exposed balsa parts primed nitrate clear dope coated several layers Black Baron 54 Model Aviation Full-Size Plans Available. See Page 196 TAPERWING 1/2 PYLON RACER / DESIGN BY JOHN HUNTON WITH J E ALBRITTON AUG 87 DRAWN BY HUNTON 87 REAR VIEW SHOWING LOW FRONTAL AREA U w NG RIB TEMPLATE JIG TEMPLATE zz HORIZONTAL STABILIZER B ELEVATOR I/B BALSA RIBS I/IBBALSA JIGS 114 BALSA 412Zff2 BALA BLOCK 000000III __ROD 3/16 DOWEL IItTORGUE ROD ALL FORMERS 1/8 BALSA WING_ANTENNA HOLES _CUTOUTSHEATH QM ROUTENOTE SAND CORNERSSHEETS WIR PUSH ROD ROUND--- B SHEETSDS IINUTPLATE r-iIIRECEIVER IiI PlC tJDEE I/IB PLY-LIILL~~L4II GLASS CLOTH WICYANO Bernie Stuecker launches Dave Beazelys Taperwing during race sponsored Prince Georges RC Club Dave back ground gets ready rip around course JE Aibritton shows off very small frontal area Taperwing design Minimal drag key going fast Next important high-speed stability model excells both January 1989 55 [ NOTE FIN OFFSET RADIO CONTROL SHORT KITS FOR THE SPORT MODELER7 BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LIHE DESIGHED BY THE PROFESSIOHAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WiNG AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER AN INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND PUN TO FLY ViSIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL Phone 81514590417 F4U CORSAIR 56 SPAN44 95 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OP MODEL ENGINEERING THAT IS HARD TO BEAT THEY NAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE A-26 INVADER 68 SPAN 6495 MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZBRO 54 SPAN3750 P-40 TOMAHAWK 55 SPAN3750 p39 AIRACOBRA 55 SPAN3750 P51 D MUSTANG 54 SPAN3750 C203 FOLGORE 56 SPAN3750 FOCKE WUIF 190 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST EE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG epoxy clear Use heat shrink covering wing panels strongly advised se lect colors model very light top equally dark bottom racing perspective con stantly changing must able dis cern immediately whether model up right inverted addition use distinc tive scheme top easy recognition judges Suspend fuel tank foam prevent fuel frothing See plan diagrammatic fuel tank rigging AMA rules event mandates fuel shutoff provided Locating fuel pickup near bottom tank allows model verted flight starve engine fuel good hinging systems avail able simplest approaches cut hinges Mylar drafting sheets Install hinges cyanoacrylate glue CyA sure insert pins secure Finish installing controls servos goldenrod-type pushrod system recom mended elevator actuation Install piece pushrod inner sheath run tenna through tail Install radio gear Check balance point carefully Dont hesitate add ballast necessary obtain good control response comes correctly balanced model Check lateral balance well wing heavy re sult will tendency airplane roll out pylon turn following notes engines propel lers fuels provided co-designer J E Albritton Engines Stock AMA rules tollowed closely use stock engines required ever because variances dimen sions due manufacturing tolerances possible get higher-performance engine trying different combinations pistons cylinders several engines test ing see combination produces best results Work glow plug find highest practical compression ratio removing washers increase com pression still maintains good needle valve insensitivity ease starting Semistock Kustom Kraftsmanship KK sells fine powerful example reason able price engine has dimension ally improved comes fine-thread nee dle valve can purchased drilled venturi pressure-tapped backplate KK engine Taperwing make fine team Modified engines Mild Some clubs allow mild modifications Advanced Transmitter Capabilities Low Cost ATRC STM Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability Fully installed kit Control Systems Laboratoi 238 5 Hiliview Dr Milpitas CA 95035 408 946-4142 Airtrunies Module TSP IM registered trademarks Airtronics Inc A-tracks Works with standard FM/PPM Receivers AirtronicsTht PCM Receivers Convertsthe Module 75PM advanced computerized control system Advanced Technology Radio Control System 56 Model Aviation 9 FOR 40 TO 60 ENGINE 9 FOR 25 TO 50 ENGINES P 38 LIGHTNING 70 SPAN . 7495 PRECISION MODEL PRODUCTS 5Zii~V Made n USA BARSTOCK ALUMINUM SPINNERS Part NoSize 11-150-B .. 1-112 11-175-B .. 1-314 11-200-B T1-225-B .. 2-114 T1-226-B .. 2-114 FAt . TT-250-B . 2-112 TT-251-B .. 2-1/2FAI .. T1-275-B 314 TT-276-B .. 2-3/4 FAt .. TT-300-B TT-301-BFAt TT-325-B .. 3-1/4 TT-350-B .. 3-1/2 TT-375-B .. 3-3/4 TT-400-B RetailApprox PriceWeight S1395058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570ez 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS Part NoSize 1T-140-A.1/4-28 TT-147-A114-28/7mm 1T-610-A.6 x 10mm TT-710-A7x 10mm rT-516-A5/16-24 TT-518-A.5/16-24/8mm TT-810-A. 8 x 10mm TT-825-A.8x 125mm TT-375-A3/8-24 . 1T-125-A10 m RetailApprox PriceWeight S495061oz 495061oz 495 063oz 495082oz 4950760z 495076oz 495076oz 4950 75oz 595 oz 5951 lSoz 3 Pieces Nut Washer atid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 will increase engine reliability mods consist using 72-turn needle valve Kustom Kraftsmanship KK pressure fuel system employs pres sure-tapped backplate also KK Wild An appreciable power increase can achieved drilling venturi %2 mod requires use pressure fuel system Another significant change requires special machining modify transfer ports tapered configuration have limited capability perform some mods Write get details J E Aibritton s address appears end article Propellers Stock The Cox 5 x 3 propeller works best prop has actual pitch over 4 Semistock 434 x 3 Kustom Krafts manship Sorta-stock An Aibritton carbon fiber spe cial prop /2A available limited quantities Write details best prop known us time writing Nonstock Remove re leading edge Cox 5 x 3 sand airfoil back onto top shorten 434 Note For optimal engine performance air propeller should al lows engine exceed 23 OOO rpm ground Fuels Cox racing fuel very hard beat Cox engines particular run well No other brand fuel under-30% nitro recommended Reliability organization Follow acronym KISS Keep Sim ple Stupid Plan what equipment need use same equipment time fly Repetition reliability Flying The Taperwing designed built Pylon Racing flying offi cial pylon course model close turns very tight other kinds flying dont let Taperwing get too far away models very low frontal profile makes difficult see distance nose tends rise dip com pletion turn check position transmitter stickchances pulled straight back smoother faster per formance flying pylon course set con trol throws minimum Kustom Kraftsmanship PO Box 3010 Fallbrook CA 92028 J E Albritton 503 Orrin Dr Vienna VA 22180 THE LEADER IN COMPETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEOTOGIVE MAXIM UM TH RUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQU ES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THPPRtCE 126677/28 1567 136778 14677/8 16 678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPtTCHPRICE 53/34 634 72833456 833/4568 645667 9456677/ 1045667 106W8W 10SEW Ii SW 11 6EW 11/ 67 12 4W 12 SW 12 56 13 56 14 56 15 56 16 4N 16 678 RC PYLON RACING SERIES 500 OtA PtTCHPRICE 75N5N 8/67/z78 SERIES 400C 63/a66777 9777 W WtDE BLADE EW EXTRA WtDE N NARROW January 1989 57