hot-dog pilots No has overwhelming advantage club Madison Area Radio Control Society MARCS contest event has cap tured interest large number members 1/2A pylon racing event beginning racer pro can both have great time neophyte just trying stay pack fin Yet same race experienced racers shaving pylons using pet strategies popularity due number factors equipment requirements hence investment minimal rules preclude winning event machine shop design parameters lead variety aircraft comparable performance finally little no practice necessary Evolution racer Top aircraft Hare MARCS rules preclude winning event machine shop Design parameters lead van etyof aircraft having comparable performance unfable Hare beats tortoise Most points well understood competition-oriented flier example nothing turns off average member quicker event such pattern requires hours hours practice before contest Some successful pilots fly 1/2A pylon racers contest Although old hands often win average club member leaves contest knowing point closely fought Around 1968 Frank Garcher commissioned MARCS member Owen Kampen design two 1/2A pylon racers rudder elevator controlpower Cox Golden Bees Bonzo Hoosier Hotshot published RCM kitted Midwest Products Typical 1/2A planes based upon chosen engine Testors foam wing slow difficult keep groove rudder/elevator After Owen designed Pacer speed poten tial clean airplane utilizing ACE foam wing recognized 1976 author designed Hare using 200 sq ACE straight foam wing fuselage meeting 2X4 rules effect Al Scidmore Frank Baker October1979 45 Flown out-of-the-box engines well proven 1 /2A pylon racer popular MARCS cluband circuit flyboth average members Left handy vise razor saw nylon belicrank quickly converted elevator horn center ievator aOWeI CIOSS TI norn vs orass tubing best dowel used should epoxied Right Presto elevator horn assemblytake care alignment Frank Baker built plans However being inveterate scratch builder cleaned up wing-fuselage junction lightened simplified construction ACE GLH appeared 1977 clear new level performance established Both Frank andl created own versions ofasweptwing Hare built-up wings Both competitive GLH possessed better aerodynamic properties end 1978 season number local modelers indicated interest building Hare 1979 season Consequently Frank never built two airplanes exactly alike same plansand agreed pool variations provide plans Hare-V version shown plans version has desirable properties 1/2A pylon racer stability especially launch cornering abil itytightly loss speed altitude very fast straight-away superior grooving capability unusually good wind pene tration ability plow through turbulence finally very smooth controllable glide Left Applying fiberglass fuselage bottom Excess epoxy resin removed toilet paper shown using entire roll Right Laying medium light glass cloth back midpoint wing using shaped foam cowl form mix epoxy thinner Use epoxy re sinsuch Hobbypoxy II does attack foam Polyester resin dissolves foam doubt try small amount resin onatest sample first 46 Model Aviation Tatone engine mount witn aummy U engine piace guide cowl shaping fiberglass cowl made bythe balloon methodgives superior smooth finish Pettit Paint has Easy Does brochure describes technique pictures Something should know anyway Front end fiberglass cowl place Filler aaaea sanded smooth transition glass cowl balsa fuselage FULL SIZE PLANS AVAILABLE SEE PAGE 128 WING ALIGNMENT KEY UBE /6 MW RIBS ID 1/16 BALSA41,BIiTEMPLATA 122z4AILERON THROW 1/4 4 I/B BALSA II I II Y--i i FUSELAGE TOP OZH O THRUST LINE FIBERGLASS COWL 1/4 PLY ONE ARM OF AS AILERON BELLCRANK EPOSY ON DOWLS/SD SHEET A-A A-ABALSA CANOPYFIN WING ALIGNMT KEY-V32 PLY FUSE DOUBLER COS 049/051 OT TO SCALE ENGINE4-40 NYLON/IRSHEET CROSS GRAIN____________ -BOLT i/4 -III IIt111/IIII TWB WING SADDLEELEVB5HRODII IIfr FY/4i4SS-2 TANKIIIKSIDES1'FR _________FUSELAGE SIDE VIEWS/SD FUSE Fl ..~II IIII\1FRF7ELEV THROW 3/IR F2 [Y-I1-------I/32 PLY DOUBLERFS FS P4 KRAFT-HAYES 053/32 SHEET CROSS GRAINI----------I/IR SHEET CROSS GRAIN MOTGR MOUNT 0 FS __________________I BALSA 0 IAFR/32 BALSA 3 P4 RASAI/RP0I23 HARE 1/ZA PYLON RACER DESIGNED BY AKSCIDMORE B FR BARER STAB I/B SHEET BALSA_______ ____ 2-YJ ELEVrnH4 /B DOWEL two predominant philosophies building pylon racers light expendable stout durable 20-oz minimum weight rule allows reasonable compromise Hare construction sturdy yet designed come 20 ounces Because small size high flight speeds around 70 mph 1/2A pylon racers must built absolutely true Hare no exception Fuselage Cut sides out medium-hard straightgrain 3/32 sheet check two sides equal flex Draw thrust line side aid aligning parts Use contact cement glue 1/32 ply doublers Glue saddle Cut out fuse lage formers draw horizontal thrust line vertical center line former Draw straight line work surface pin tops formers F4-S board aligning center lines Use 5minute epoxy glue body sides formers Before glue sets use square check front fuselage sides body sides thrust lines match Pin formers F6-8 board glue sides install pered tail post Install F2 F3 last use triangle square insure firewall zero degrees Use lines formers body sides insure proper alignment Once basic box established install elevator pushrod tube before sheeting top bottom fuselage Except noted use PICA Gluit dries quickly strong fiber glass cowl built using balloon method Pettit Paint Co has Easy Does brochure describes technique pictures Install engine mount crankcase Cox TD Medallion guide shaping foam nose form Cut foam block fit closely possible crankcase mount completely enclose Cut foam leave about nd front prop driver glue F-i foam Use razor blade carve foam rough shape finishsand 120 paper Practice sanding piece scrap foam before working nose foam Place masking tape fuselage about nd fire wall fuselage areas close nose will fiberglassed Cut two layers fairly heavy glass cloth fit Use epoxy resin such Hobbypoxy 2 foam will attacked mix resin thinner use polyester resin foam will dissolve cover tightly-fitting rubber balloon will create real mess front plane doubt test epoxy intend use foam scrap Put small amount epoxy foam nose form areas covered lay first layer fiberglass cloth use small loose pieces cloth unless pass over nose form will forced out position balloon Smear resin add second cloth layer sure both layers well coated resin Support fuselage both hands will available Blow up very large balloon least 12 diameter Place center balloon over end nose push down firmly Once balloon covers glassed areas use hand keep balloon sliding back up fuselage slowly releasing air balloon Use masking tape secure bottom edge balloon opposite nozzle fuselage epoxy hard remove balloon Cut hole large enough retrieve crank case pick out foam Cowl will very smooth quite strong Any weak areas can found additionalcloth epoxy added inside cowl Shape engine access area requirements Some fliers treat 1/2A racers expendable others expect plane last two seasons Area nose midpoint wing takes beating since slides field landing Layer glass cloth resin area will prolong fuselage life medium light cloth October 1979 47 1/32 PLY 2 REG Continued page 116 simpie interesting conrlguratlonswept wings canopy blacK-magic wing sipsasi ott uy numbers few stripes Aileron right wing panel also shows clearly NNOUNCINGThe New Instant-Dry Q I Adhesive Process Fib ToSheet Foam Wing Cores new product Coreflim replaces using white glue epoxy contact cement sheeting foam wing cores Corefilm rough thin lightweight mylar tape has coated both sides contact adhesive Corefilm ready instant use After covering wing core 1Y2 strips corefilm remove paper backing set plywood balsa sheeting material place press foam core bond instant Corefilm flight tested gliders power ships tough mylar film provides strapping tape effect both top bottom has proven desirable superior quality Corefilm comes P12 wide 36 yard rolls roll will cover over 1900 sq 13 sq - At dealer direct Write brochure complete line BILL EVANSAIR/CRAFT 19216 Calvert Street Reseda CA213/344-6391 Winning Ideas FOURMOST Le RETRACTABLE TOW HOOK RELEASE Pr ice $575 Simplest reliable device avail able After line released hook retracts body unit leaving smooth surface bot tom aircraft No special attach ments required Weight 1Aoz PRICE 525 40 AIRFLO ENGINE MOUNT IDEAL FOR QUICKY 500 ER FOURMOST PRODUCTS Fuel Fitting SetsFuel Manifold Strut FairingsGapless Hinge Slotter Fuel Shut OffGapless Hinges Cockpit Coaming 049/051 Airflow Engine Mounts Send SASE Complete Information Fuivi~i 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 Quiet Power -Tatone Makes Easy new super quiet K&B 40 R/C muffler requires no exhaust plugs fittings adaptors Muffler machined fit exhaust stack cover exposed holes Just bolt on.thats Will reduce noise 10 12 decibels little no loss rpms Noise cancelled interposing sound waves eRadi cal free flow expansion chamber angled blow exhaust away fuselage attach provision pressure fitting Also available ENVA 29 35 40 45 OS MAX 30 35 40 SUPER TIGRE G21 35 46 Add $100 extra above engines specify type Mounting strap screw included $1295 No 306 N Add $125 postage handling CA residents add 6% tax Dealer inquiries invited goes out Nick DeCarlis Gainesville FL 5-minute OOS flight Peanut Cessna Cardinal RG plane weighed 8 9 grams used NP 5-1/2 propsanded turned 1014 loop FAI 1/16 rubber Congratulations Nick Send us dope TWA space devoted FF scale major magazines seems too little taste remem ber advertising money talks Have considered FF scale club Drop SASE Ill see can put touch club newsletter fellow modeler might find interesting Thanks cards letters photos etc Bill Warner 423-C San VicenteBlvd Santa Monica CA 90402 Hare/Scidmore/ Baker continued page 47 used excess resin soaked up toilet tissue very light weight job can done Wings standard Note plans call use 1 trailing edge stock both panels ailerons cut out later Install aileron servo mounting rails before sheeting center section Alignment crucial Easy way get true wings pin trailing edge truly flat work surface Place spacer under trailing edge elevate spars may pinned flat working surface Glue both top bottom wing spars place glue wet glue ribs trailing edge Use ruler insure leading edges ribs same height above work surface Glue leading edge hold place pins weights until glue set Leave wing board until shear webs have glued place top sheeting stalled ensures straight true wing very strong very rigld light weight wing Epoxy gloss center strengthen wing meets fuselage Balance wing center line check equal panel weight adjust sanding until balanced Wing alignment key tip plates installed after basic wing covered Foam wings have used noticeable difference being heavier built-up Once wing completed trim fuselage wing saddle until wing fits perfectly horizontal fuselage sides vertical sure wing center line parallel thrust linezero degrees inci dence Install wing hold-down block Before drilling pilot holes wing hold-down screws use string measure tip wing same distance fuselage hard balsa carve front hold-down block fit wing glue place Install elevator sure horizontal relative wing Use triangle check fin verticaL Sight fin front sure true parallel fuselage center line Various covering schemes have used heat-shrink covering Solar Film EconoKote etc works well author uses painted fuse lages film other surfaces other covers fuselage up leading edge film paints forward important use colors trim make plane very visible distinguishable other aircraft Whites yel lows orange combinations work well Flying Hare should set up grooves yet turns rapidly Aileron elevator throws shown plans approximate Roll rate should positive being quick Too much aileron elevator throw can make aircraft difficult handle should initiate turn aileron use up elevator tighten up turn preference allow nose drop slightly during turn Adjust CG until straightand-level flight can maintained no eleva tor inputs built true airplane weighs 116 Model Aviation between 20 21 ounces properties men- Different brands graphite lubricant tioned should achieved Only other prerequisite available both powder liquid versions hottest possible out-of-box engine Any l/2A hardware stores addition bellpylon racer no better its engine pilot crank instance its also helpful using flexible cable pushrods especially long ones work powdered graphite outer plastic sheathing before gluing pushrod ____________________________________ model can held vertically squirting graphite Better yet smear cable itself powder before sliding inside sheathing Next month coverage CL Scale 79 Nationals cables alone multi-throttle control Piper Twin Comnianche flew last years Nats type arrangement order get carburetors opening same direction engines right side model need have throttle arms reversed top carb two braided cables wrapped soldered center along short drive wire attaches bellcrank Note wire attached same bellcrank arm throttle leadout normal place Du-Bro threaded coup lers soldered carburetor end cable RC link goes gives necessary adjustment get engines working together important thing keep mind three control installations eliminate binding friction wherever pos sible system must work perfectly free smooth throughout its entire range maximum effectiveness dependability During steps assembly double check make sure building bind develops find cure before proceeding further parts control system have nylon-to-metal bearing surfaces shouldnt need extra lubrication However metal-to-metal surfaces such bellcrank normally use little graphite lubricant help make system work silky smooth Mike Gre*z Box 162 Montezuma IA 50171 CL Aerobatics/Paul continued page 49 Finish sanding 600 wet point plane should ready color coat intend continue epoxy paint spray base coat color want use nitrate butyrate dopes should first apply coat Aero Gloss clear over talcum powder coat Ac cording Paul base coats added about four ounces 57-in span plane 28 stab and47 fuselage Figure another fouroz use epoxy-type paint question recently asked about what special building M&P Stiletto kit First remember two runs kits first some bad ribs instructions little vague control hookup second run much better ribs Either way certain wing ribs true stack up Replace off Also may have cut out larger holes inboard ribs leadouts several Stilettos Les McDonald used two pushrods bellcrank going flap horn elevator horn gives less flap travel standard Nobler hookup actually 1-to-i ratio flap elevator what 95 percent stunt fliers use further illustrate simplified terms set up 1-to-i ratio connect pushrod bellcrank hole flap horn t pushrod flap horn elevator horn connected hole t point flap horn also pivot point elevator horn Dont forget brass bushings long life horns bellcrank pushrod should connect hole bellcrank approximately 3/4 bellcrank pivot Actually Top Flite bellcrank hole 11/16 Sig bellcrank hole about t point writer suggests kit builder follow 1-to-i setup first planes until can accumulate enough experience evaluate possible change different ratio Most Stiletto kits writer has seen have built using ST 46 engine wing area kit weight 48 54 oz can expect just makes sense use powerful engine certain allow tank 525 550 oz constructing front end fuselage means tank will 525 575 long Probably necessary substitution wood om block Several people have stated replaced bottom block two other pieces attempt cut October1979 117 CL Scale/Gretz continued page 48
Edition: Model Aviation - 1979/10
Page Numbers: 45, 46, 47, 116, 117
hot-dog pilots No has overwhelming advantage club Madison Area Radio Control Society MARCS contest event has cap tured interest large number members 1/2A pylon racing event beginning racer pro can both have great time neophyte just trying stay pack fin Yet same race experienced racers shaving pylons using pet strategies popularity due number factors equipment requirements hence investment minimal rules preclude winning event machine shop design parameters lead variety aircraft comparable performance finally little no practice necessary Evolution racer Top aircraft Hare MARCS rules preclude winning event machine shop Design parameters lead van etyof aircraft having comparable performance unfable Hare beats tortoise Most points well understood competition-oriented flier example nothing turns off average member quicker event such pattern requires hours hours practice before contest Some successful pilots fly 1/2A pylon racers contest Although old hands often win average club member leaves contest knowing point closely fought Around 1968 Frank Garcher commissioned MARCS member Owen Kampen design two 1/2A pylon racers rudder elevator controlpower Cox Golden Bees Bonzo Hoosier Hotshot published RCM kitted Midwest Products Typical 1/2A planes based upon chosen engine Testors foam wing slow difficult keep groove rudder/elevator After Owen designed Pacer speed poten tial clean airplane utilizing ACE foam wing recognized 1976 author designed Hare using 200 sq ACE straight foam wing fuselage meeting 2X4 rules effect Al Scidmore Frank Baker October1979 45 Flown out-of-the-box engines well proven 1 /2A pylon racer popular MARCS cluband circuit flyboth average members Left handy vise razor saw nylon belicrank quickly converted elevator horn center ievator aOWeI CIOSS TI norn vs orass tubing best dowel used should epoxied Right Presto elevator horn assemblytake care alignment Frank Baker built plans However being inveterate scratch builder cleaned up wing-fuselage junction lightened simplified construction ACE GLH appeared 1977 clear new level performance established Both Frank andl created own versions ofasweptwing Hare built-up wings Both competitive GLH possessed better aerodynamic properties end 1978 season number local modelers indicated interest building Hare 1979 season Consequently Frank never built two airplanes exactly alike same plansand agreed pool variations provide plans Hare-V version shown plans version has desirable properties 1/2A pylon racer stability especially launch cornering abil itytightly loss speed altitude very fast straight-away superior grooving capability unusually good wind pene tration ability plow through turbulence finally very smooth controllable glide Left Applying fiberglass fuselage bottom Excess epoxy resin removed toilet paper shown using entire roll Right Laying medium light glass cloth back midpoint wing using shaped foam cowl form mix epoxy thinner Use epoxy re sinsuch Hobbypoxy II does attack foam Polyester resin dissolves foam doubt try small amount resin onatest sample first 46 Model Aviation Tatone engine mount witn aummy U engine piace guide cowl shaping fiberglass cowl made bythe balloon methodgives superior smooth finish Pettit Paint has Easy Does brochure describes technique pictures Something should know anyway Front end fiberglass cowl place Filler aaaea sanded smooth transition glass cowl balsa fuselage FULL SIZE PLANS AVAILABLE SEE PAGE 128 WING ALIGNMENT KEY UBE /6 MW RIBS ID 1/16 BALSA41,BIiTEMPLATA 122z4AILERON THROW 1/4 4 I/B BALSA II I II Y--i i FUSELAGE TOP OZH O THRUST LINE FIBERGLASS COWL 1/4 PLY ONE ARM OF AS AILERON BELLCRANK EPOSY ON DOWLS/SD SHEET A-A A-ABALSA CANOPYFIN WING ALIGNMT KEY-V32 PLY FUSE DOUBLER COS 049/051 OT TO SCALE ENGINE4-40 NYLON/IRSHEET CROSS GRAIN____________ -BOLT i/4 -III IIt111/IIII TWB WING SADDLEELEVB5HRODII IIfr FY/4i4SS-2 TANKIIIKSIDES1'FR _________FUSELAGE SIDE VIEWS/SD FUSE Fl ..~II IIII\1FRF7ELEV THROW 3/IR F2 [Y-I1-------I/32 PLY DOUBLERFS FS P4 KRAFT-HAYES 053/32 SHEET CROSS GRAINI----------I/IR SHEET CROSS GRAIN MOTGR MOUNT 0 FS __________________I BALSA 0 IAFR/32 BALSA 3 P4 RASAI/RP0I23 HARE 1/ZA PYLON RACER DESIGNED BY AKSCIDMORE B FR BARER STAB I/B SHEET BALSA_______ ____ 2-YJ ELEVrnH4 /B DOWEL two predominant philosophies building pylon racers light expendable stout durable 20-oz minimum weight rule allows reasonable compromise Hare construction sturdy yet designed come 20 ounces Because small size high flight speeds around 70 mph 1/2A pylon racers must built absolutely true Hare no exception Fuselage Cut sides out medium-hard straightgrain 3/32 sheet check two sides equal flex Draw thrust line side aid aligning parts Use contact cement glue 1/32 ply doublers Glue saddle Cut out fuse lage formers draw horizontal thrust line vertical center line former Draw straight line work surface pin tops formers F4-S board aligning center lines Use 5minute epoxy glue body sides formers Before glue sets use square check front fuselage sides body sides thrust lines match Pin formers F6-8 board glue sides install pered tail post Install F2 F3 last use triangle square insure firewall zero degrees Use lines formers body sides insure proper alignment Once basic box established install elevator pushrod tube before sheeting top bottom fuselage Except noted use PICA Gluit dries quickly strong fiber glass cowl built using balloon method Pettit Paint Co has Easy Does brochure describes technique pictures Install engine mount crankcase Cox TD Medallion guide shaping foam nose form Cut foam block fit closely possible crankcase mount completely enclose Cut foam leave about nd front prop driver glue F-i foam Use razor blade carve foam rough shape finishsand 120 paper Practice sanding piece scrap foam before working nose foam Place masking tape fuselage about nd fire wall fuselage areas close nose will fiberglassed Cut two layers fairly heavy glass cloth fit Use epoxy resin such Hobbypoxy 2 foam will attacked mix resin thinner use polyester resin foam will dissolve cover tightly-fitting rubber balloon will create real mess front plane doubt test epoxy intend use foam scrap Put small amount epoxy foam nose form areas covered lay first layer fiberglass cloth use small loose pieces cloth unless pass over nose form will forced out position balloon Smear resin add second cloth layer sure both layers well coated resin Support fuselage both hands will available Blow up very large balloon least 12 diameter Place center balloon over end nose push down firmly Once balloon covers glassed areas use hand keep balloon sliding back up fuselage slowly releasing air balloon Use masking tape secure bottom edge balloon opposite nozzle fuselage epoxy hard remove balloon Cut hole large enough retrieve crank case pick out foam Cowl will very smooth quite strong Any weak areas can found additionalcloth epoxy added inside cowl Shape engine access area requirements Some fliers treat 1/2A racers expendable others expect plane last two seasons Area nose midpoint wing takes beating since slides field landing Layer glass cloth resin area will prolong fuselage life medium light cloth October 1979 47 1/32 PLY 2 REG Continued page 116 simpie interesting conrlguratlonswept wings canopy blacK-magic wing sipsasi ott uy numbers few stripes Aileron right wing panel also shows clearly NNOUNCINGThe New Instant-Dry Q I Adhesive Process Fib ToSheet Foam Wing Cores new product Coreflim replaces using white glue epoxy contact cement sheeting foam wing cores Corefilm rough thin lightweight mylar tape has coated both sides contact adhesive Corefilm ready instant use After covering wing core 1Y2 strips corefilm remove paper backing set plywood balsa sheeting material place press foam core bond instant Corefilm flight tested gliders power ships tough mylar film provides strapping tape effect both top bottom has proven desirable superior quality Corefilm comes P12 wide 36 yard rolls roll will cover over 1900 sq 13 sq - At dealer direct Write brochure complete line BILL EVANSAIR/CRAFT 19216 Calvert Street Reseda CA213/344-6391 Winning Ideas FOURMOST Le RETRACTABLE TOW HOOK RELEASE Pr ice $575 Simplest reliable device avail able After line released hook retracts body unit leaving smooth surface bot tom aircraft No special attach ments required Weight 1Aoz PRICE 525 40 AIRFLO ENGINE MOUNT IDEAL FOR QUICKY 500 ER FOURMOST PRODUCTS Fuel Fitting SetsFuel Manifold Strut FairingsGapless Hinge Slotter Fuel Shut OffGapless Hinges Cockpit Coaming 049/051 Airflow Engine Mounts Send SASE Complete Information Fuivi~i 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 Quiet Power -Tatone Makes Easy new super quiet K&B 40 R/C muffler requires no exhaust plugs fittings adaptors Muffler machined fit exhaust stack cover exposed holes Just bolt on.thats Will reduce noise 10 12 decibels little no loss rpms Noise cancelled interposing sound waves eRadi cal free flow expansion chamber angled blow exhaust away fuselage attach provision pressure fitting Also available ENVA 29 35 40 45 OS MAX 30 35 40 SUPER TIGRE G21 35 46 Add $100 extra above engines specify type Mounting strap screw included $1295 No 306 N Add $125 postage handling CA residents add 6% tax Dealer inquiries invited goes out Nick DeCarlis Gainesville FL 5-minute OOS flight Peanut Cessna Cardinal RG plane weighed 8 9 grams used NP 5-1/2 propsanded turned 1014 loop FAI 1/16 rubber Congratulations Nick Send us dope TWA space devoted FF scale major magazines seems too little taste remem ber advertising money talks Have considered FF scale club Drop SASE Ill see can put touch club newsletter fellow modeler might find interesting Thanks cards letters photos etc Bill Warner 423-C San VicenteBlvd Santa Monica CA 90402 Hare/Scidmore/ Baker continued page 47 used excess resin soaked up toilet tissue very light weight job can done Wings standard Note plans call use 1 trailing edge stock both panels ailerons cut out later Install aileron servo mounting rails before sheeting center section Alignment crucial Easy way get true wings pin trailing edge truly flat work surface Place spacer under trailing edge elevate spars may pinned flat working surface Glue both top bottom wing spars place glue wet glue ribs trailing edge Use ruler insure leading edges ribs same height above work surface Glue leading edge hold place pins weights until glue set Leave wing board until shear webs have glued place top sheeting stalled ensures straight true wing very strong very rigld light weight wing Epoxy gloss center strengthen wing meets fuselage Balance wing center line check equal panel weight adjust sanding until balanced Wing alignment key tip plates installed after basic wing covered Foam wings have used noticeable difference being heavier built-up Once wing completed trim fuselage wing saddle until wing fits perfectly horizontal fuselage sides vertical sure wing center line parallel thrust linezero degrees inci dence Install wing hold-down block Before drilling pilot holes wing hold-down screws use string measure tip wing same distance fuselage hard balsa carve front hold-down block fit wing glue place Install elevator sure horizontal relative wing Use triangle check fin verticaL Sight fin front sure true parallel fuselage center line Various covering schemes have used heat-shrink covering Solar Film EconoKote etc works well author uses painted fuse lages film other surfaces other covers fuselage up leading edge film paints forward important use colors trim make plane very visible distinguishable other aircraft Whites yel lows orange combinations work well Flying Hare should set up grooves yet turns rapidly Aileron elevator throws shown plans approximate Roll rate should positive being quick Too much aileron elevator throw can make aircraft difficult handle should initiate turn aileron use up elevator tighten up turn preference allow nose drop slightly during turn Adjust CG until straightand-level flight can maintained no eleva tor inputs built true airplane weighs 116 Model Aviation between 20 21 ounces properties men- Different brands graphite lubricant tioned should achieved Only other prerequisite available both powder liquid versions hottest possible out-of-box engine Any l/2A hardware stores addition bellpylon racer no better its engine pilot crank instance its also helpful using flexible cable pushrods especially long ones work powdered graphite outer plastic sheathing before gluing pushrod ____________________________________ model can held vertically squirting graphite Better yet smear cable itself powder before sliding inside sheathing Next month coverage CL Scale 79 Nationals cables alone multi-throttle control Piper Twin Comnianche flew last years Nats type arrangement order get carburetors opening same direction engines right side model need have throttle arms reversed top carb two braided cables wrapped soldered center along short drive wire attaches bellcrank Note wire attached same bellcrank arm throttle leadout normal place Du-Bro threaded coup lers soldered carburetor end cable RC link goes gives necessary adjustment get engines working together important thing keep mind three control installations eliminate binding friction wherever pos sible system must work perfectly free smooth throughout its entire range maximum effectiveness dependability During steps assembly double check make sure building bind develops find cure before proceeding further parts control system have nylon-to-metal bearing surfaces shouldnt need extra lubrication However metal-to-metal surfaces such bellcrank normally use little graphite lubricant help make system work silky smooth Mike Gre*z Box 162 Montezuma IA 50171 CL Aerobatics/Paul continued page 49 Finish sanding 600 wet point plane should ready color coat intend continue epoxy paint spray base coat color want use nitrate butyrate dopes should first apply coat Aero Gloss clear over talcum powder coat Ac cording Paul base coats added about four ounces 57-in span plane 28 stab and47 fuselage Figure another fouroz use epoxy-type paint question recently asked about what special building M&P Stiletto kit First remember two runs kits first some bad ribs instructions little vague control hookup second run much better ribs Either way certain wing ribs true stack up Replace off Also may have cut out larger holes inboard ribs leadouts several Stilettos Les McDonald used two pushrods bellcrank going flap horn elevator horn gives less flap travel standard Nobler hookup actually 1-to-i ratio flap elevator what 95 percent stunt fliers use further illustrate simplified terms set up 1-to-i ratio connect pushrod bellcrank hole flap horn t pushrod flap horn elevator horn connected hole t point flap horn also pivot point elevator horn Dont forget brass bushings long life horns bellcrank pushrod should connect hole bellcrank approximately 3/4 bellcrank pivot Actually Top Flite bellcrank hole 11/16 Sig bellcrank hole about t point writer suggests kit builder follow 1-to-i setup first planes until can accumulate enough experience evaluate possible change different ratio Most Stiletto kits writer has seen have built using ST 46 engine wing area kit weight 48 54 oz can expect just makes sense use powerful engine certain allow tank 525 550 oz constructing front end fuselage means tank will 525 575 long Probably necessary substitution wood om block Several people have stated replaced bottom block two other pieces attempt cut October1979 117 CL Scale/Gretz continued page 48
Edition: Model Aviation - 1979/10
Page Numbers: 45, 46, 47, 116, 117
hot-dog pilots No has overwhelming advantage club Madison Area Radio Control Society MARCS contest event has cap tured interest large number members 1/2A pylon racing event beginning racer pro can both have great time neophyte just trying stay pack fin Yet same race experienced racers shaving pylons using pet strategies popularity due number factors equipment requirements hence investment minimal rules preclude winning event machine shop design parameters lead variety aircraft comparable performance finally little no practice necessary Evolution racer Top aircraft Hare MARCS rules preclude winning event machine shop Design parameters lead van etyof aircraft having comparable performance unfable Hare beats tortoise Most points well understood competition-oriented flier example nothing turns off average member quicker event such pattern requires hours hours practice before contest Some successful pilots fly 1/2A pylon racers contest Although old hands often win average club member leaves contest knowing point closely fought Around 1968 Frank Garcher commissioned MARCS member Owen Kampen design two 1/2A pylon racers rudder elevator controlpower Cox Golden Bees Bonzo Hoosier Hotshot published RCM kitted Midwest Products Typical 1/2A planes based upon chosen engine Testors foam wing slow difficult keep groove rudder/elevator After Owen designed Pacer speed poten tial clean airplane utilizing ACE foam wing recognized 1976 author designed Hare using 200 sq ACE straight foam wing fuselage meeting 2X4 rules effect Al Scidmore Frank Baker October1979 45 Flown out-of-the-box engines well proven 1 /2A pylon racer popular MARCS cluband circuit flyboth average members Left handy vise razor saw nylon belicrank quickly converted elevator horn center ievator aOWeI CIOSS TI norn vs orass tubing best dowel used should epoxied Right Presto elevator horn assemblytake care alignment Frank Baker built plans However being inveterate scratch builder cleaned up wing-fuselage junction lightened simplified construction ACE GLH appeared 1977 clear new level performance established Both Frank andl created own versions ofasweptwing Hare built-up wings Both competitive GLH possessed better aerodynamic properties end 1978 season number local modelers indicated interest building Hare 1979 season Consequently Frank never built two airplanes exactly alike same plansand agreed pool variations provide plans Hare-V version shown plans version has desirable properties 1/2A pylon racer stability especially launch cornering abil itytightly loss speed altitude very fast straight-away superior grooving capability unusually good wind pene tration ability plow through turbulence finally very smooth controllable glide Left Applying fiberglass fuselage bottom Excess epoxy resin removed toilet paper shown using entire roll Right Laying medium light glass cloth back midpoint wing using shaped foam cowl form mix epoxy thinner Use epoxy re sinsuch Hobbypoxy II does attack foam Polyester resin dissolves foam doubt try small amount resin onatest sample first 46 Model Aviation Tatone engine mount witn aummy U engine piace guide cowl shaping fiberglass cowl made bythe balloon methodgives superior smooth finish Pettit Paint has Easy Does brochure describes technique pictures Something should know anyway Front end fiberglass cowl place Filler aaaea sanded smooth transition glass cowl balsa fuselage FULL SIZE PLANS AVAILABLE SEE PAGE 128 WING ALIGNMENT KEY UBE /6 MW RIBS ID 1/16 BALSA41,BIiTEMPLATA 122z4AILERON THROW 1/4 4 I/B BALSA II I II Y--i i FUSELAGE TOP OZH O THRUST LINE FIBERGLASS COWL 1/4 PLY ONE ARM OF AS AILERON BELLCRANK EPOSY ON DOWLS/SD SHEET A-A A-ABALSA CANOPYFIN WING ALIGNMT KEY-V32 PLY FUSE DOUBLER COS 049/051 OT TO SCALE ENGINE4-40 NYLON/IRSHEET CROSS GRAIN____________ -BOLT i/4 -III IIt111/IIII TWB WING SADDLEELEVB5HRODII IIfr FY/4i4SS-2 TANKIIIKSIDES1'FR _________FUSELAGE SIDE VIEWS/SD FUSE Fl ..~II IIII\1FRF7ELEV THROW 3/IR F2 [Y-I1-------I/32 PLY DOUBLERFS FS P4 KRAFT-HAYES 053/32 SHEET CROSS GRAINI----------I/IR SHEET CROSS GRAIN MOTGR MOUNT 0 FS __________________I BALSA 0 IAFR/32 BALSA 3 P4 RASAI/RP0I23 HARE 1/ZA PYLON RACER DESIGNED BY AKSCIDMORE B FR BARER STAB I/B SHEET BALSA_______ ____ 2-YJ ELEVrnH4 /B DOWEL two predominant philosophies building pylon racers light expendable stout durable 20-oz minimum weight rule allows reasonable compromise Hare construction sturdy yet designed come 20 ounces Because small size high flight speeds around 70 mph 1/2A pylon racers must built absolutely true Hare no exception Fuselage Cut sides out medium-hard straightgrain 3/32 sheet check two sides equal flex Draw thrust line side aid aligning parts Use contact cement glue 1/32 ply doublers Glue saddle Cut out fuse lage formers draw horizontal thrust line vertical center line former Draw straight line work surface pin tops formers F4-S board aligning center lines Use 5minute epoxy glue body sides formers Before glue sets use square check front fuselage sides body sides thrust lines match Pin formers F6-8 board glue sides install pered tail post Install F2 F3 last use triangle square insure firewall zero degrees Use lines formers body sides insure proper alignment Once basic box established install elevator pushrod tube before sheeting top bottom fuselage Except noted use PICA Gluit dries quickly strong fiber glass cowl built using balloon method Pettit Paint Co has Easy Does brochure describes technique pictures Install engine mount crankcase Cox TD Medallion guide shaping foam nose form Cut foam block fit closely possible crankcase mount completely enclose Cut foam leave about nd front prop driver glue F-i foam Use razor blade carve foam rough shape finishsand 120 paper Practice sanding piece scrap foam before working nose foam Place masking tape fuselage about nd fire wall fuselage areas close nose will fiberglassed Cut two layers fairly heavy glass cloth fit Use epoxy resin such Hobbypoxy 2 foam will attacked mix resin thinner use polyester resin foam will dissolve cover tightly-fitting rubber balloon will create real mess front plane doubt test epoxy intend use foam scrap Put small amount epoxy foam nose form areas covered lay first layer fiberglass cloth use small loose pieces cloth unless pass over nose form will forced out position balloon Smear resin add second cloth layer sure both layers well coated resin Support fuselage both hands will available Blow up very large balloon least 12 diameter Place center balloon over end nose push down firmly Once balloon covers glassed areas use hand keep balloon sliding back up fuselage slowly releasing air balloon Use masking tape secure bottom edge balloon opposite nozzle fuselage epoxy hard remove balloon Cut hole large enough retrieve crank case pick out foam Cowl will very smooth quite strong Any weak areas can found additionalcloth epoxy added inside cowl Shape engine access area requirements Some fliers treat 1/2A racers expendable others expect plane last two seasons Area nose midpoint wing takes beating since slides field landing Layer glass cloth resin area will prolong fuselage life medium light cloth October 1979 47 1/32 PLY 2 REG Continued page 116 simpie interesting conrlguratlonswept wings canopy blacK-magic wing sipsasi ott uy numbers few stripes Aileron right wing panel also shows clearly NNOUNCINGThe New Instant-Dry Q I Adhesive Process Fib ToSheet Foam Wing Cores new product Coreflim replaces using white glue epoxy contact cement sheeting foam wing cores Corefilm rough thin lightweight mylar tape has coated both sides contact adhesive Corefilm ready instant use After covering wing core 1Y2 strips corefilm remove paper backing set plywood balsa sheeting material place press foam core bond instant Corefilm flight tested gliders power ships tough mylar film provides strapping tape effect both top bottom has proven desirable superior quality Corefilm comes P12 wide 36 yard rolls roll will cover over 1900 sq 13 sq - At dealer direct Write brochure complete line BILL EVANSAIR/CRAFT 19216 Calvert Street Reseda CA213/344-6391 Winning Ideas FOURMOST Le RETRACTABLE TOW HOOK RELEASE Pr ice $575 Simplest reliable device avail able After line released hook retracts body unit leaving smooth surface bot tom aircraft No special attach ments required Weight 1Aoz PRICE 525 40 AIRFLO ENGINE MOUNT IDEAL FOR QUICKY 500 ER FOURMOST PRODUCTS Fuel Fitting SetsFuel Manifold Strut FairingsGapless Hinge Slotter Fuel Shut OffGapless Hinges Cockpit Coaming 049/051 Airflow Engine Mounts Send SASE Complete Information Fuivi~i 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 Quiet Power -Tatone Makes Easy new super quiet K&B 40 R/C muffler requires no exhaust plugs fittings adaptors Muffler machined fit exhaust stack cover exposed holes Just bolt on.thats Will reduce noise 10 12 decibels little no loss rpms Noise cancelled interposing sound waves eRadi cal free flow expansion chamber angled blow exhaust away fuselage attach provision pressure fitting Also available ENVA 29 35 40 45 OS MAX 30 35 40 SUPER TIGRE G21 35 46 Add $100 extra above engines specify type Mounting strap screw included $1295 No 306 N Add $125 postage handling CA residents add 6% tax Dealer inquiries invited goes out Nick DeCarlis Gainesville FL 5-minute OOS flight Peanut Cessna Cardinal RG plane weighed 8 9 grams used NP 5-1/2 propsanded turned 1014 loop FAI 1/16 rubber Congratulations Nick Send us dope TWA space devoted FF scale major magazines seems too little taste remem ber advertising money talks Have considered FF scale club Drop SASE Ill see can put touch club newsletter fellow modeler might find interesting Thanks cards letters photos etc Bill Warner 423-C San VicenteBlvd Santa Monica CA 90402 Hare/Scidmore/ Baker continued page 47 used excess resin soaked up toilet tissue very light weight job can done Wings standard Note plans call use 1 trailing edge stock both panels ailerons cut out later Install aileron servo mounting rails before sheeting center section Alignment crucial Easy way get true wings pin trailing edge truly flat work surface Place spacer under trailing edge elevate spars may pinned flat working surface Glue both top bottom wing spars place glue wet glue ribs trailing edge Use ruler insure leading edges ribs same height above work surface Glue leading edge hold place pins weights until glue set Leave wing board until shear webs have glued place top sheeting stalled ensures straight true wing very strong very rigld light weight wing Epoxy gloss center strengthen wing meets fuselage Balance wing center line check equal panel weight adjust sanding until balanced Wing alignment key tip plates installed after basic wing covered Foam wings have used noticeable difference being heavier built-up Once wing completed trim fuselage wing saddle until wing fits perfectly horizontal fuselage sides vertical sure wing center line parallel thrust linezero degrees inci dence Install wing hold-down block Before drilling pilot holes wing hold-down screws use string measure tip wing same distance fuselage hard balsa carve front hold-down block fit wing glue place Install elevator sure horizontal relative wing Use triangle check fin verticaL Sight fin front sure true parallel fuselage center line Various covering schemes have used heat-shrink covering Solar Film EconoKote etc works well author uses painted fuse lages film other surfaces other covers fuselage up leading edge film paints forward important use colors trim make plane very visible distinguishable other aircraft Whites yel lows orange combinations work well Flying Hare should set up grooves yet turns rapidly Aileron elevator throws shown plans approximate Roll rate should positive being quick Too much aileron elevator throw can make aircraft difficult handle should initiate turn aileron use up elevator tighten up turn preference allow nose drop slightly during turn Adjust CG until straightand-level flight can maintained no eleva tor inputs built true airplane weighs 116 Model Aviation between 20 21 ounces properties men- Different brands graphite lubricant tioned should achieved Only other prerequisite available both powder liquid versions hottest possible out-of-box engine Any l/2A hardware stores addition bellpylon racer no better its engine pilot crank instance its also helpful using flexible cable pushrods especially long ones work powdered graphite outer plastic sheathing before gluing pushrod ____________________________________ model can held vertically squirting graphite Better yet smear cable itself powder before sliding inside sheathing Next month coverage CL Scale 79 Nationals cables alone multi-throttle control Piper Twin Comnianche flew last years Nats type arrangement order get carburetors opening same direction engines right side model need have throttle arms reversed top carb two braided cables wrapped soldered center along short drive wire attaches bellcrank Note wire attached same bellcrank arm throttle leadout normal place Du-Bro threaded coup lers soldered carburetor end cable RC link goes gives necessary adjustment get engines working together important thing keep mind three control installations eliminate binding friction wherever pos sible system must work perfectly free smooth throughout its entire range maximum effectiveness dependability During steps assembly double check make sure building bind develops find cure before proceeding further parts control system have nylon-to-metal bearing surfaces shouldnt need extra lubrication However metal-to-metal surfaces such bellcrank normally use little graphite lubricant help make system work silky smooth Mike Gre*z Box 162 Montezuma IA 50171 CL Aerobatics/Paul continued page 49 Finish sanding 600 wet point plane should ready color coat intend continue epoxy paint spray base coat color want use nitrate butyrate dopes should first apply coat Aero Gloss clear over talcum powder coat Ac cording Paul base coats added about four ounces 57-in span plane 28 stab and47 fuselage Figure another fouroz use epoxy-type paint question recently asked about what special building M&P Stiletto kit First remember two runs kits first some bad ribs instructions little vague control hookup second run much better ribs Either way certain wing ribs true stack up Replace off Also may have cut out larger holes inboard ribs leadouts several Stilettos Les McDonald used two pushrods bellcrank going flap horn elevator horn gives less flap travel standard Nobler hookup actually 1-to-i ratio flap elevator what 95 percent stunt fliers use further illustrate simplified terms set up 1-to-i ratio connect pushrod bellcrank hole flap horn t pushrod flap horn elevator horn connected hole t point flap horn also pivot point elevator horn Dont forget brass bushings long life horns bellcrank pushrod should connect hole bellcrank approximately 3/4 bellcrank pivot Actually Top Flite bellcrank hole 11/16 Sig bellcrank hole about t point writer suggests kit builder follow 1-to-i setup first planes until can accumulate enough experience evaluate possible change different ratio Most Stiletto kits writer has seen have built using ST 46 engine wing area kit weight 48 54 oz can expect just makes sense use powerful engine certain allow tank 525 550 oz constructing front end fuselage means tank will 525 575 long Probably necessary substitution wood om block Several people have stated replaced bottom block two other pieces attempt cut October1979 117 CL Scale/Gretz continued page 48
Edition: Model Aviation - 1979/10
Page Numbers: 45, 46, 47, 116, 117
hot-dog pilots No has overwhelming advantage club Madison Area Radio Control Society MARCS contest event has cap tured interest large number members 1/2A pylon racing event beginning racer pro can both have great time neophyte just trying stay pack fin Yet same race experienced racers shaving pylons using pet strategies popularity due number factors equipment requirements hence investment minimal rules preclude winning event machine shop design parameters lead variety aircraft comparable performance finally little no practice necessary Evolution racer Top aircraft Hare MARCS rules preclude winning event machine shop Design parameters lead van etyof aircraft having comparable performance unfable Hare beats tortoise Most points well understood competition-oriented flier example nothing turns off average member quicker event such pattern requires hours hours practice before contest Some successful pilots fly 1/2A pylon racers contest Although old hands often win average club member leaves contest knowing point closely fought Around 1968 Frank Garcher commissioned MARCS member Owen Kampen design two 1/2A pylon racers rudder elevator controlpower Cox Golden Bees Bonzo Hoosier Hotshot published RCM kitted Midwest Products Typical 1/2A planes based upon chosen engine Testors foam wing slow difficult keep groove rudder/elevator After Owen designed Pacer speed poten tial clean airplane utilizing ACE foam wing recognized 1976 author designed Hare using 200 sq ACE straight foam wing fuselage meeting 2X4 rules effect Al Scidmore Frank Baker October1979 45 Flown out-of-the-box engines well proven 1 /2A pylon racer popular MARCS cluband circuit flyboth average members Left handy vise razor saw nylon belicrank quickly converted elevator horn center ievator aOWeI CIOSS TI norn vs orass tubing best dowel used should epoxied Right Presto elevator horn assemblytake care alignment Frank Baker built plans However being inveterate scratch builder cleaned up wing-fuselage junction lightened simplified construction ACE GLH appeared 1977 clear new level performance established Both Frank andl created own versions ofasweptwing Hare built-up wings Both competitive GLH possessed better aerodynamic properties end 1978 season number local modelers indicated interest building Hare 1979 season Consequently Frank never built two airplanes exactly alike same plansand agreed pool variations provide plans Hare-V version shown plans version has desirable properties 1/2A pylon racer stability especially launch cornering abil itytightly loss speed altitude very fast straight-away superior grooving capability unusually good wind pene tration ability plow through turbulence finally very smooth controllable glide Left Applying fiberglass fuselage bottom Excess epoxy resin removed toilet paper shown using entire roll Right Laying medium light glass cloth back midpoint wing using shaped foam cowl form mix epoxy thinner Use epoxy re sinsuch Hobbypoxy II does attack foam Polyester resin dissolves foam doubt try small amount resin onatest sample first 46 Model Aviation Tatone engine mount witn aummy U engine piace guide cowl shaping fiberglass cowl made bythe balloon methodgives superior smooth finish Pettit Paint has Easy Does brochure describes technique pictures Something should know anyway Front end fiberglass cowl place Filler aaaea sanded smooth transition glass cowl balsa fuselage FULL SIZE PLANS AVAILABLE SEE PAGE 128 WING ALIGNMENT KEY UBE /6 MW RIBS ID 1/16 BALSA41,BIiTEMPLATA 122z4AILERON THROW 1/4 4 I/B BALSA II I II Y--i i FUSELAGE TOP OZH O THRUST LINE FIBERGLASS COWL 1/4 PLY ONE ARM OF AS AILERON BELLCRANK EPOSY ON DOWLS/SD SHEET A-A A-ABALSA CANOPYFIN WING ALIGNMT KEY-V32 PLY FUSE DOUBLER COS 049/051 OT TO SCALE ENGINE4-40 NYLON/IRSHEET CROSS GRAIN____________ -BOLT i/4 -III IIt111/IIII TWB WING SADDLEELEVB5HRODII IIfr FY/4i4SS-2 TANKIIIKSIDES1'FR _________FUSELAGE SIDE VIEWS/SD FUSE Fl ..~II IIII\1FRF7ELEV THROW 3/IR F2 [Y-I1-------I/32 PLY DOUBLERFS FS P4 KRAFT-HAYES 053/32 SHEET CROSS GRAINI----------I/IR SHEET CROSS GRAIN MOTGR MOUNT 0 FS __________________I BALSA 0 IAFR/32 BALSA 3 P4 RASAI/RP0I23 HARE 1/ZA PYLON RACER DESIGNED BY AKSCIDMORE B FR BARER STAB I/B SHEET BALSA_______ ____ 2-YJ ELEVrnH4 /B DOWEL two predominant philosophies building pylon racers light expendable stout durable 20-oz minimum weight rule allows reasonable compromise Hare construction sturdy yet designed come 20 ounces Because small size high flight speeds around 70 mph 1/2A pylon racers must built absolutely true Hare no exception Fuselage Cut sides out medium-hard straightgrain 3/32 sheet check two sides equal flex Draw thrust line side aid aligning parts Use contact cement glue 1/32 ply doublers Glue saddle Cut out fuse lage formers draw horizontal thrust line vertical center line former Draw straight line work surface pin tops formers F4-S board aligning center lines Use 5minute epoxy glue body sides formers Before glue sets use square check front fuselage sides body sides thrust lines match Pin formers F6-8 board glue sides install pered tail post Install F2 F3 last use triangle square insure firewall zero degrees Use lines formers body sides insure proper alignment Once basic box established install elevator pushrod tube before sheeting top bottom fuselage Except noted use PICA Gluit dries quickly strong fiber glass cowl built using balloon method Pettit Paint Co has Easy Does brochure describes technique pictures Install engine mount crankcase Cox TD Medallion guide shaping foam nose form Cut foam block fit closely possible crankcase mount completely enclose Cut foam leave about nd front prop driver glue F-i foam Use razor blade carve foam rough shape finishsand 120 paper Practice sanding piece scrap foam before working nose foam Place masking tape fuselage about nd fire wall fuselage areas close nose will fiberglassed Cut two layers fairly heavy glass cloth fit Use epoxy resin such Hobbypoxy 2 foam will attacked mix resin thinner use polyester resin foam will dissolve cover tightly-fitting rubber balloon will create real mess front plane doubt test epoxy intend use foam scrap Put small amount epoxy foam nose form areas covered lay first layer fiberglass cloth use small loose pieces cloth unless pass over nose form will forced out position balloon Smear resin add second cloth layer sure both layers well coated resin Support fuselage both hands will available Blow up very large balloon least 12 diameter Place center balloon over end nose push down firmly Once balloon covers glassed areas use hand keep balloon sliding back up fuselage slowly releasing air balloon Use masking tape secure bottom edge balloon opposite nozzle fuselage epoxy hard remove balloon Cut hole large enough retrieve crank case pick out foam Cowl will very smooth quite strong Any weak areas can found additionalcloth epoxy added inside cowl Shape engine access area requirements Some fliers treat 1/2A racers expendable others expect plane last two seasons Area nose midpoint wing takes beating since slides field landing Layer glass cloth resin area will prolong fuselage life medium light cloth October 1979 47 1/32 PLY 2 REG Continued page 116 simpie interesting conrlguratlonswept wings canopy blacK-magic wing sipsasi ott uy numbers few stripes Aileron right wing panel also shows clearly NNOUNCINGThe New Instant-Dry Q I Adhesive Process Fib ToSheet Foam Wing Cores new product Coreflim replaces using white glue epoxy contact cement sheeting foam wing cores Corefilm rough thin lightweight mylar tape has coated both sides contact adhesive Corefilm ready instant use After covering wing core 1Y2 strips corefilm remove paper backing set plywood balsa sheeting material place press foam core bond instant Corefilm flight tested gliders power ships tough mylar film provides strapping tape effect both top bottom has proven desirable superior quality Corefilm comes P12 wide 36 yard rolls roll will cover over 1900 sq 13 sq - At dealer direct Write brochure complete line BILL EVANSAIR/CRAFT 19216 Calvert Street Reseda CA213/344-6391 Winning Ideas FOURMOST Le RETRACTABLE TOW HOOK RELEASE Pr ice $575 Simplest reliable device avail able After line released hook retracts body unit leaving smooth surface bot tom aircraft No special attach ments required Weight 1Aoz PRICE 525 40 AIRFLO ENGINE MOUNT IDEAL FOR QUICKY 500 ER FOURMOST PRODUCTS Fuel Fitting SetsFuel Manifold Strut FairingsGapless Hinge Slotter Fuel Shut OffGapless Hinges Cockpit Coaming 049/051 Airflow Engine Mounts Send SASE Complete Information Fuivi~i 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 Quiet Power -Tatone Makes Easy new super quiet K&B 40 R/C muffler requires no exhaust plugs fittings adaptors Muffler machined fit exhaust stack cover exposed holes Just bolt on.thats Will reduce noise 10 12 decibels little no loss rpms Noise cancelled interposing sound waves eRadi cal free flow expansion chamber angled blow exhaust away fuselage attach provision pressure fitting Also available ENVA 29 35 40 45 OS MAX 30 35 40 SUPER TIGRE G21 35 46 Add $100 extra above engines specify type Mounting strap screw included $1295 No 306 N Add $125 postage handling CA residents add 6% tax Dealer inquiries invited goes out Nick DeCarlis Gainesville FL 5-minute OOS flight Peanut Cessna Cardinal RG plane weighed 8 9 grams used NP 5-1/2 propsanded turned 1014 loop FAI 1/16 rubber Congratulations Nick Send us dope TWA space devoted FF scale major magazines seems too little taste remem ber advertising money talks Have considered FF scale club Drop SASE Ill see can put touch club newsletter fellow modeler might find interesting Thanks cards letters photos etc Bill Warner 423-C San VicenteBlvd Santa Monica CA 90402 Hare/Scidmore/ Baker continued page 47 used excess resin soaked up toilet tissue very light weight job can done Wings standard Note plans call use 1 trailing edge stock both panels ailerons cut out later Install aileron servo mounting rails before sheeting center section Alignment crucial Easy way get true wings pin trailing edge truly flat work surface Place spacer under trailing edge elevate spars may pinned flat working surface Glue both top bottom wing spars place glue wet glue ribs trailing edge Use ruler insure leading edges ribs same height above work surface Glue leading edge hold place pins weights until glue set Leave wing board until shear webs have glued place top sheeting stalled ensures straight true wing very strong very rigld light weight wing Epoxy gloss center strengthen wing meets fuselage Balance wing center line check equal panel weight adjust sanding until balanced Wing alignment key tip plates installed after basic wing covered Foam wings have used noticeable difference being heavier built-up Once wing completed trim fuselage wing saddle until wing fits perfectly horizontal fuselage sides vertical sure wing center line parallel thrust linezero degrees inci dence Install wing hold-down block Before drilling pilot holes wing hold-down screws use string measure tip wing same distance fuselage hard balsa carve front hold-down block fit wing glue place Install elevator sure horizontal relative wing Use triangle check fin verticaL Sight fin front sure true parallel fuselage center line Various covering schemes have used heat-shrink covering Solar Film EconoKote etc works well author uses painted fuse lages film other surfaces other covers fuselage up leading edge film paints forward important use colors trim make plane very visible distinguishable other aircraft Whites yel lows orange combinations work well Flying Hare should set up grooves yet turns rapidly Aileron elevator throws shown plans approximate Roll rate should positive being quick Too much aileron elevator throw can make aircraft difficult handle should initiate turn aileron use up elevator tighten up turn preference allow nose drop slightly during turn Adjust CG until straightand-level flight can maintained no eleva tor inputs built true airplane weighs 116 Model Aviation between 20 21 ounces properties men- Different brands graphite lubricant tioned should achieved Only other prerequisite available both powder liquid versions hottest possible out-of-box engine Any l/2A hardware stores addition bellpylon racer no better its engine pilot crank instance its also helpful using flexible cable pushrods especially long ones work powdered graphite outer plastic sheathing before gluing pushrod ____________________________________ model can held vertically squirting graphite Better yet smear cable itself powder before sliding inside sheathing Next month coverage CL Scale 79 Nationals cables alone multi-throttle control Piper Twin Comnianche flew last years Nats type arrangement order get carburetors opening same direction engines right side model need have throttle arms reversed top carb two braided cables wrapped soldered center along short drive wire attaches bellcrank Note wire attached same bellcrank arm throttle leadout normal place Du-Bro threaded coup lers soldered carburetor end cable RC link goes gives necessary adjustment get engines working together important thing keep mind three control installations eliminate binding friction wherever pos sible system must work perfectly free smooth throughout its entire range maximum effectiveness dependability During steps assembly double check make sure building bind develops find cure before proceeding further parts control system have nylon-to-metal bearing surfaces shouldnt need extra lubrication However metal-to-metal surfaces such bellcrank normally use little graphite lubricant help make system work silky smooth Mike Gre*z Box 162 Montezuma IA 50171 CL Aerobatics/Paul continued page 49 Finish sanding 600 wet point plane should ready color coat intend continue epoxy paint spray base coat color want use nitrate butyrate dopes should first apply coat Aero Gloss clear over talcum powder coat Ac cording Paul base coats added about four ounces 57-in span plane 28 stab and47 fuselage Figure another fouroz use epoxy-type paint question recently asked about what special building M&P Stiletto kit First remember two runs kits first some bad ribs instructions little vague control hookup second run much better ribs Either way certain wing ribs true stack up Replace off Also may have cut out larger holes inboard ribs leadouts several Stilettos Les McDonald used two pushrods bellcrank going flap horn elevator horn gives less flap travel standard Nobler hookup actually 1-to-i ratio flap elevator what 95 percent stunt fliers use further illustrate simplified terms set up 1-to-i ratio connect pushrod bellcrank hole flap horn t pushrod flap horn elevator horn connected hole t point flap horn also pivot point elevator horn Dont forget brass bushings long life horns bellcrank pushrod should connect hole bellcrank approximately 3/4 bellcrank pivot Actually Top Flite bellcrank hole 11/16 Sig bellcrank hole about t point writer suggests kit builder follow 1-to-i setup first planes until can accumulate enough experience evaluate possible change different ratio Most Stiletto kits writer has seen have built using ST 46 engine wing area kit weight 48 54 oz can expect just makes sense use powerful engine certain allow tank 525 550 oz constructing front end fuselage means tank will 525 575 long Probably necessary substitution wood om block Several people have stated replaced bottom block two other pieces attempt cut October1979 117 CL Scale/Gretz continued page 48
Edition: Model Aviation - 1979/10
Page Numbers: 45, 46, 47, 116, 117
hot-dog pilots No has overwhelming advantage club Madison Area Radio Control Society MARCS contest event has cap tured interest large number members 1/2A pylon racing event beginning racer pro can both have great time neophyte just trying stay pack fin Yet same race experienced racers shaving pylons using pet strategies popularity due number factors equipment requirements hence investment minimal rules preclude winning event machine shop design parameters lead variety aircraft comparable performance finally little no practice necessary Evolution racer Top aircraft Hare MARCS rules preclude winning event machine shop Design parameters lead van etyof aircraft having comparable performance unfable Hare beats tortoise Most points well understood competition-oriented flier example nothing turns off average member quicker event such pattern requires hours hours practice before contest Some successful pilots fly 1/2A pylon racers contest Although old hands often win average club member leaves contest knowing point closely fought Around 1968 Frank Garcher commissioned MARCS member Owen Kampen design two 1/2A pylon racers rudder elevator controlpower Cox Golden Bees Bonzo Hoosier Hotshot published RCM kitted Midwest Products Typical 1/2A planes based upon chosen engine Testors foam wing slow difficult keep groove rudder/elevator After Owen designed Pacer speed poten tial clean airplane utilizing ACE foam wing recognized 1976 author designed Hare using 200 sq ACE straight foam wing fuselage meeting 2X4 rules effect Al Scidmore Frank Baker October1979 45 Flown out-of-the-box engines well proven 1 /2A pylon racer popular MARCS cluband circuit flyboth average members Left handy vise razor saw nylon belicrank quickly converted elevator horn center ievator aOWeI CIOSS TI norn vs orass tubing best dowel used should epoxied Right Presto elevator horn assemblytake care alignment Frank Baker built plans However being inveterate scratch builder cleaned up wing-fuselage junction lightened simplified construction ACE GLH appeared 1977 clear new level performance established Both Frank andl created own versions ofasweptwing Hare built-up wings Both competitive GLH possessed better aerodynamic properties end 1978 season number local modelers indicated interest building Hare 1979 season Consequently Frank never built two airplanes exactly alike same plansand agreed pool variations provide plans Hare-V version shown plans version has desirable properties 1/2A pylon racer stability especially launch cornering abil itytightly loss speed altitude very fast straight-away superior grooving capability unusually good wind pene tration ability plow through turbulence finally very smooth controllable glide Left Applying fiberglass fuselage bottom Excess epoxy resin removed toilet paper shown using entire roll Right Laying medium light glass cloth back midpoint wing using shaped foam cowl form mix epoxy thinner Use epoxy re sinsuch Hobbypoxy II does attack foam Polyester resin dissolves foam doubt try small amount resin onatest sample first 46 Model Aviation Tatone engine mount witn aummy U engine piace guide cowl shaping fiberglass cowl made bythe balloon methodgives superior smooth finish Pettit Paint has Easy Does brochure describes technique pictures Something should know anyway Front end fiberglass cowl place Filler aaaea sanded smooth transition glass cowl balsa fuselage FULL SIZE PLANS AVAILABLE SEE PAGE 128 WING ALIGNMENT KEY UBE /6 MW RIBS ID 1/16 BALSA41,BIiTEMPLATA 122z4AILERON THROW 1/4 4 I/B BALSA II I II Y--i i FUSELAGE TOP OZH O THRUST LINE FIBERGLASS COWL 1/4 PLY ONE ARM OF AS AILERON BELLCRANK EPOSY ON DOWLS/SD SHEET A-A A-ABALSA CANOPYFIN WING ALIGNMT KEY-V32 PLY FUSE DOUBLER COS 049/051 OT TO SCALE ENGINE4-40 NYLON/IRSHEET CROSS GRAIN____________ -BOLT i/4 -III IIt111/IIII TWB WING SADDLEELEVB5HRODII IIfr FY/4i4SS-2 TANKIIIKSIDES1'FR _________FUSELAGE SIDE VIEWS/SD FUSE Fl ..~II IIII\1FRF7ELEV THROW 3/IR F2 [Y-I1-------I/32 PLY DOUBLERFS FS P4 KRAFT-HAYES 053/32 SHEET CROSS GRAINI----------I/IR SHEET CROSS GRAIN MOTGR MOUNT 0 FS __________________I BALSA 0 IAFR/32 BALSA 3 P4 RASAI/RP0I23 HARE 1/ZA PYLON RACER DESIGNED BY AKSCIDMORE B FR BARER STAB I/B SHEET BALSA_______ ____ 2-YJ ELEVrnH4 /B DOWEL two predominant philosophies building pylon racers light expendable stout durable 20-oz minimum weight rule allows reasonable compromise Hare construction sturdy yet designed come 20 ounces Because small size high flight speeds around 70 mph 1/2A pylon racers must built absolutely true Hare no exception Fuselage Cut sides out medium-hard straightgrain 3/32 sheet check two sides equal flex Draw thrust line side aid aligning parts Use contact cement glue 1/32 ply doublers Glue saddle Cut out fuse lage formers draw horizontal thrust line vertical center line former Draw straight line work surface pin tops formers F4-S board aligning center lines Use 5minute epoxy glue body sides formers Before glue sets use square check front fuselage sides body sides thrust lines match Pin formers F6-8 board glue sides install pered tail post Install F2 F3 last use triangle square insure firewall zero degrees Use lines formers body sides insure proper alignment Once basic box established install elevator pushrod tube before sheeting top bottom fuselage Except noted use PICA Gluit dries quickly strong fiber glass cowl built using balloon method Pettit Paint Co has Easy Does brochure describes technique pictures Install engine mount crankcase Cox TD Medallion guide shaping foam nose form Cut foam block fit closely possible crankcase mount completely enclose Cut foam leave about nd front prop driver glue F-i foam Use razor blade carve foam rough shape finishsand 120 paper Practice sanding piece scrap foam before working nose foam Place masking tape fuselage about nd fire wall fuselage areas close nose will fiberglassed Cut two layers fairly heavy glass cloth fit Use epoxy resin such Hobbypoxy 2 foam will attacked mix resin thinner use polyester resin foam will dissolve cover tightly-fitting rubber balloon will create real mess front plane doubt test epoxy intend use foam scrap Put small amount epoxy foam nose form areas covered lay first layer fiberglass cloth use small loose pieces cloth unless pass over nose form will forced out position balloon Smear resin add second cloth layer sure both layers well coated resin Support fuselage both hands will available Blow up very large balloon least 12 diameter Place center balloon over end nose push down firmly Once balloon covers glassed areas use hand keep balloon sliding back up fuselage slowly releasing air balloon Use masking tape secure bottom edge balloon opposite nozzle fuselage epoxy hard remove balloon Cut hole large enough retrieve crank case pick out foam Cowl will very smooth quite strong Any weak areas can found additionalcloth epoxy added inside cowl Shape engine access area requirements Some fliers treat 1/2A racers expendable others expect plane last two seasons Area nose midpoint wing takes beating since slides field landing Layer glass cloth resin area will prolong fuselage life medium light cloth October 1979 47 1/32 PLY 2 REG Continued page 116 simpie interesting conrlguratlonswept wings canopy blacK-magic wing sipsasi ott uy numbers few stripes Aileron right wing panel also shows clearly NNOUNCINGThe New Instant-Dry Q I Adhesive Process Fib ToSheet Foam Wing Cores new product Coreflim replaces using white glue epoxy contact cement sheeting foam wing cores Corefilm rough thin lightweight mylar tape has coated both sides contact adhesive Corefilm ready instant use After covering wing core 1Y2 strips corefilm remove paper backing set plywood balsa sheeting material place press foam core bond instant Corefilm flight tested gliders power ships tough mylar film provides strapping tape effect both top bottom has proven desirable superior quality Corefilm comes P12 wide 36 yard rolls roll will cover over 1900 sq 13 sq - At dealer direct Write brochure complete line BILL EVANSAIR/CRAFT 19216 Calvert Street Reseda CA213/344-6391 Winning Ideas FOURMOST Le RETRACTABLE TOW HOOK RELEASE Pr ice $575 Simplest reliable device avail able After line released hook retracts body unit leaving smooth surface bot tom aircraft No special attach ments required Weight 1Aoz PRICE 525 40 AIRFLO ENGINE MOUNT IDEAL FOR QUICKY 500 ER FOURMOST PRODUCTS Fuel Fitting SetsFuel Manifold Strut FairingsGapless Hinge Slotter Fuel Shut OffGapless Hinges Cockpit Coaming 049/051 Airflow Engine Mounts Send SASE Complete Information Fuivi~i 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 Quiet Power -Tatone Makes Easy new super quiet K&B 40 R/C muffler requires no exhaust plugs fittings adaptors Muffler machined fit exhaust stack cover exposed holes Just bolt on.thats Will reduce noise 10 12 decibels little no loss rpms Noise cancelled interposing sound waves eRadi cal free flow expansion chamber angled blow exhaust away fuselage attach provision pressure fitting Also available ENVA 29 35 40 45 OS MAX 30 35 40 SUPER TIGRE G21 35 46 Add $100 extra above engines specify type Mounting strap screw included $1295 No 306 N Add $125 postage handling CA residents add 6% tax Dealer inquiries invited goes out Nick DeCarlis Gainesville FL 5-minute OOS flight Peanut Cessna Cardinal RG plane weighed 8 9 grams used NP 5-1/2 propsanded turned 1014 loop FAI 1/16 rubber Congratulations Nick Send us dope TWA space devoted FF scale major magazines seems too little taste remem ber advertising money talks Have considered FF scale club Drop SASE Ill see can put touch club newsletter fellow modeler might find interesting Thanks cards letters photos etc Bill Warner 423-C San VicenteBlvd Santa Monica CA 90402 Hare/Scidmore/ Baker continued page 47 used excess resin soaked up toilet tissue very light weight job can done Wings standard Note plans call use 1 trailing edge stock both panels ailerons cut out later Install aileron servo mounting rails before sheeting center section Alignment crucial Easy way get true wings pin trailing edge truly flat work surface Place spacer under trailing edge elevate spars may pinned flat working surface Glue both top bottom wing spars place glue wet glue ribs trailing edge Use ruler insure leading edges ribs same height above work surface Glue leading edge hold place pins weights until glue set Leave wing board until shear webs have glued place top sheeting stalled ensures straight true wing very strong very rigld light weight wing Epoxy gloss center strengthen wing meets fuselage Balance wing center line check equal panel weight adjust sanding until balanced Wing alignment key tip plates installed after basic wing covered Foam wings have used noticeable difference being heavier built-up Once wing completed trim fuselage wing saddle until wing fits perfectly horizontal fuselage sides vertical sure wing center line parallel thrust linezero degrees inci dence Install wing hold-down block Before drilling pilot holes wing hold-down screws use string measure tip wing same distance fuselage hard balsa carve front hold-down block fit wing glue place Install elevator sure horizontal relative wing Use triangle check fin verticaL Sight fin front sure true parallel fuselage center line Various covering schemes have used heat-shrink covering Solar Film EconoKote etc works well author uses painted fuse lages film other surfaces other covers fuselage up leading edge film paints forward important use colors trim make plane very visible distinguishable other aircraft Whites yel lows orange combinations work well Flying Hare should set up grooves yet turns rapidly Aileron elevator throws shown plans approximate Roll rate should positive being quick Too much aileron elevator throw can make aircraft difficult handle should initiate turn aileron use up elevator tighten up turn preference allow nose drop slightly during turn Adjust CG until straightand-level flight can maintained no eleva tor inputs built true airplane weighs 116 Model Aviation between 20 21 ounces properties men- Different brands graphite lubricant tioned should achieved Only other prerequisite available both powder liquid versions hottest possible out-of-box engine Any l/2A hardware stores addition bellpylon racer no better its engine pilot crank instance its also helpful using flexible cable pushrods especially long ones work powdered graphite outer plastic sheathing before gluing pushrod ____________________________________ model can held vertically squirting graphite Better yet smear cable itself powder before sliding inside sheathing Next month coverage CL Scale 79 Nationals cables alone multi-throttle control Piper Twin Comnianche flew last years Nats type arrangement order get carburetors opening same direction engines right side model need have throttle arms reversed top carb two braided cables wrapped soldered center along short drive wire attaches bellcrank Note wire attached same bellcrank arm throttle leadout normal place Du-Bro threaded coup lers soldered carburetor end cable RC link goes gives necessary adjustment get engines working together important thing keep mind three control installations eliminate binding friction wherever pos sible system must work perfectly free smooth throughout its entire range maximum effectiveness dependability During steps assembly double check make sure building bind develops find cure before proceeding further parts control system have nylon-to-metal bearing surfaces shouldnt need extra lubrication However metal-to-metal surfaces such bellcrank normally use little graphite lubricant help make system work silky smooth Mike Gre*z Box 162 Montezuma IA 50171 CL Aerobatics/Paul continued page 49 Finish sanding 600 wet point plane should ready color coat intend continue epoxy paint spray base coat color want use nitrate butyrate dopes should first apply coat Aero Gloss clear over talcum powder coat Ac cording Paul base coats added about four ounces 57-in span plane 28 stab and47 fuselage Figure another fouroz use epoxy-type paint question recently asked about what special building M&P Stiletto kit First remember two runs kits first some bad ribs instructions little vague control hookup second run much better ribs Either way certain wing ribs true stack up Replace off Also may have cut out larger holes inboard ribs leadouts several Stilettos Les McDonald used two pushrods bellcrank going flap horn elevator horn gives less flap travel standard Nobler hookup actually 1-to-i ratio flap elevator what 95 percent stunt fliers use further illustrate simplified terms set up 1-to-i ratio connect pushrod bellcrank hole flap horn t pushrod flap horn elevator horn connected hole t point flap horn also pivot point elevator horn Dont forget brass bushings long life horns bellcrank pushrod should connect hole bellcrank approximately 3/4 bellcrank pivot Actually Top Flite bellcrank hole 11/16 Sig bellcrank hole about t point writer suggests kit builder follow 1-to-i setup first planes until can accumulate enough experience evaluate possible change different ratio Most Stiletto kits writer has seen have built using ST 46 engine wing area kit weight 48 54 oz can expect just makes sense use powerful engine certain allow tank 525 550 oz constructing front end fuselage means tank will 525 575 long Probably necessary substitution wood om block Several people have stated replaced bottom block two other pieces attempt cut October1979 117 CL Scale/Gretz continued page 48