Winner Best Scale IN RESEARCHING usually finds sometimes endin2 weak data photos i-vie Award hi remark U Stephen J ever project ni ending up fest itself Such Fairchild After cover EAA Sport N jilt either ft call made 60 miles distant ye Tom Leonhai day picture ns As carefu Left Steve Sterling Award won 77 Nats Award made top static points although plane must make official flight qualify Stinson Voyager won same award 1975 Above Separate wing panels preserve uninterrupted line fuselage top Panels easier build finish one-piece wingand simple attachment system fool-proof 8 Model Aviation Vegas enables normally tiown twoiols thought con cerningespecially important scaleri em strong order survivehand other keep em light because once hit its over anyway think can take credence both approaches depend ing particular type project pre fer former because first flight Las Vegas disaster flying along 10-feet altitude An airplane never should have taken off engine barely half throttle stubborn author insisted attempting fly against wishes able John Roth managed baby Fairchild air straight mounting plans n originai ma us servo bati yards no Otto turn mode e minimal nose cowl landing gear fairing plane back air hour completed two su flights highly doubt feasil lighter built construction practicality sacrificing strength prop erly designed model can inherit tremen dous strength simple techniques strength can induced needed no penalty weight model de signed along conventional lines fre quent references perspective sketches should help clarify prob lem areas y iii mble epoxy Cement vertical b*ih iction ment lywood Ut efore rizing yourself types wood cabin ubood -bal twoclear ance noics tor tneass tubing Secondly attachand epoxy two 015 brass plates tue 1/16 ply wood bottom before assembling sides After framing door opening fore stringers landing gear main fair ing 3/16 dowel compression strut can April1978 9 Rudder elevator s tion arrangement rudder moved bin floor accessible thro htn shows belicrank di Nyrod foreground plans show mo# red Nyrod pu igement resists Seen through di w&ng spars rele Good engineering thing Check give builder 10 Model ip servos mounted ca irn plan top view wing An ervos allow bottom hatch st balsa stwck struts 1 h 1 La ritA ce 5 four ovei e lf NOSE COWLI/B BALSADP2 PLANRINAC.PlOELEVATOR ABP12SOFTBALSACOSTS HORN CARVEFROM71 TAiLWSEER~ /1 15I SPRUCEIIPAIRING BATT ROT 44-B-SCABSRVOOESS ~eOcSA AVSSET 121z[S 005CC 1 IFI SAUNA SLOCEF. SCAR ROT FlMAPLE BLOCES I/IS PLTWTOO UF VEAR STRAPS TO MAPLE BLOCOS I/O ROLSR-l//1/ V S/S SAL S RP'BA LS V R-A- S IDES SVSA BALSA S/IS PLTRAVOBOTTOM fF98 P7U 5000CR CONTROL CARLES 2 SCOT F8 U F IIIi -T/TZ BALSA S TESU plo P9 __ I/S SOUSA PLANKING PASELASE CONNTRACTIONCABIN SIRES REPOSE FOSUESS STRINGERS LORINATE I/VT PLYWOCO LVBINATEOCARVEFROSA- / 00 ACETATE/ OTT ABS SALOOq~ Ii 0 0/ISI rr--SPRACESIFB1IP915F10Tfii /SWITOSIIu 50lJ- ELEVATOR OPSOCEIIRAOOES CARIN SITEU II/TO PLTSCSTOT- II IS FR0/TA SALGAP55 I TO GIS BRATS EPOR/ PATTT FIRESOLASS WHEEL PANTS BAR/C FOAT VALVES FAIRCHILD RANGER 24 OESIGBEO SNO OSRWN BRPLATE o.I/ATM SCALE -a M 0 5 -I 0 75i $ j cg1 FORM HIG ATASS US SHOWN TO ALIOE OVER OGO U ASSEMBLE SPRING I116 BALSA II CH TO P16 BHO-~ LIEW*O RTOHITr~IX SA WAW4j7ThWI BALSA WAW6WAW5 W4WW44W3iiW2 WAAIiz- p I IIIOHlrlTGGHHlFT B = I W NG TIPS ZTHTO BALSA TOTEr1116 BALSA SHEET fIII L GOLUCH 4 RLOCEN\ SCREW EPOGY TO SCREW 4 EPOHYP15 PLOWOOG RUPLE RLHCES TO i HAN PLORUOGTHT SO BALSA URRIT FROM AD TO WILEAPING EGUESSPRUCE WINA SPARS ___ ____ ____ Tz -— III IIIII 0II II-____ U — 0 ____—= ._____ ____ ______________IEHB -W4 W211W3G~PW4HTW4W4W4W5 IHB IHW6ANNANAW6W6 II_____TPLH.HIS OIA61 _______ MRAN\7 — 4AI1~ __ II~JI - I--_ PLAP SHIN RALSAFLAPRINSE TAPERES AS STOWSP15FORMICA LELEO BORN N1- IIWS II II II IITAPER EPHET TO TA SHEETTOTTAM SHEET FLATTENSOLSER RRUHS ORILL TAP FOR SILOER SHLGER W RB NWA BR TOT I-TO MNXXk/LI SWOO RRNRROE MNW-7HIS SHEET BALSA HH PA SO SPRUCETHIS TOWEL RING 4 SOLGERFIRERALAGS SOLUER OIT BRASSBRASS TARN EHOATOOPLTWHHO 4 UHIT THUGSSGLOCR 0I05AST FAIRCHILDRANGER 24 DESIHTED ANG ORGWN RTPLUTE IPX TO SCALEA OF 2 FULL-SIZE PLANS AVAILABLESEE PAGE 104 pHI WI WI 0 o WB Although scale m case about stringers gi involves cererug aetalung imary fuselage box visil simulated batter cabin detailing have inspect act Sport Scale pr o separates men hese details since ma nd off 10 feet exu single detail picture showath allo hole two 4-4C mounted tuselage no tI20 epoxied blind nuts 4-40 screv iventional foam d horizont er top tbi rudder Add a complete g made fror od wheel fox soldered 010 Sig eaIs attachir s tubing Notice epoxied Two flex rod c control steerable tail wheel turns rudder Gear A normal L lb load i pilot makes ngs Althot iaster u cra uld r wing tip sport oi 14 lv rr lay flue P keyh hold Dotai o stitchi~ mor ome some pant ar two nv 1/64detrain bent overvel tap Aut rch pailL pox transi th wire sm Ip IL screw anain Covering & FinishingmodellarUt C covered Sig silk except wood surfaces finished K&B resin primed auto-lacquer pri mer After brushing two coats butyrate clear thinned 50% silk surfaces pinking tape applied thinned white glue Rib stitching simulated applying beads Titebond tooth pick numerous methods simulating pinking tape problem pre-doped Silkspan tissue sharp Saran Wrap serrated edge still end up frayed edges found tracing vellum gives best definition does require pre-doping although little effort required adhere doped surface hence thinned white glue Spray additional two three coats clear over silk surfaces two coasts gray butyrate will make silk surfaces compatible tone wood surfaces finished gray lacquer primer succeeding coats yellow has poor covering qualities anyway will result match preparing wood surfaces polyester resin remember quality finished product will good shaping sanding done balsa wood may have flow resin sections cowl because its shape since tends run over sides Finish 400 wet-or-dry spray few coats gray auto-lacquer primer Sand completely off 300-400 wet-or-dry will notice primer begins fill low spots prefer sand dry since easier tell part paper used part clean use handy damp sponge wipe off dust resi due Final sanding should done 500-600 wet-or-dry paper attempt spray component time such fuselage stab rudder etc Otherwise will end up im proper coverage overspray runs etc Since fuselage tail dif ficult some sort fixture must made accommodate surfaces horizontal spray gun Visualize framework scrap furring strips built support rotate model such would barbecue spit now possible keep surfaces horizontal painting time rotate fuselage completely around ready apply second coat No two coats butyrate 24hour period Vinyl contact paper makes good masking stencil spraying numerals rudder Black pin striping accom either thin stick-on vinyl tape method want something permanent use #3 Rapidograph India ink designed use mylar film Spray dust coat two clear seal ink Cut template flat 030-040 ace tate windshield Cement place 16 Model Aviation landing gear again wing Struts SlIp cuff fastened posi tion Allen screws blind nuts Lower part telescoping main strut brass tubing Wilbold RC-56 white glue Make garnish trim molding 030 ABS flat stock paint before applying wind shield RC-56 glue Apply door window inside cut 3/16-thin rear window molding apply over rear window outside Door handles made either brass aluminum may made function can fixed case hook should epoxied inside door rubberband holding doors tight against fuselage exhaust stacks simulated eter Plastruct covered bright foil painted Flying Originally K&B 61 stalled beam mounts proximity exhaust stack inside cowl necessitated aluminum header right angles order route exhaust gases rearward No room expansion chamber created kinds over heating problems besides being able keep engine running final ap proach first four test flights ended up dead-stick landings suspected small cowl opening contributing factor overheated en gine later learn significant two culprits aluminum manifold created much back pressure exhaust gases no place go Additional room provided some sort expansion cham ber muffler Secondly air entering small opening became turbulent effectively cooling cylinder fins way through out bottom open ing maple beam mounts sawed off flush firewall using Kraft radial mount engine rotated front view far over possible po sition put cylinder behind cowl opening allowed design I-in diameter expansion tube muffler Fabri cate tin stock silver solder solve second problem required ex pertise some engine experts namely Big Al Adamisin Ron Plotske conclusion size cowl opening problem since exit opening certainly sufficient Air turbulent around cylinder passing through fins re quired since inside cowl got larger went rearward air tended favor inside shape Some sort baffle needed Borrowing earlier days speed simple alu minum baffle strapped around cyl inder forcing intake air go through fins out backside next practice session enjoyable first opportunity taxi back another takeoff K&B finally idl ing running properly model flew right off drawing board smooth ap plication power brings ship right up its main gear down elevator Normal flying done just over Continued page 83 April 1978 17 Lower portion rudder showing scale permanent trim tab Other points interest tail wheel fork fin fillet portion elevator fiiqht trim tab simulated rivets upper portion ruddenumeeis ou ted black No 3 Fa1 era lighting make hinge line visible out ordinary light baremy discernible Letters Editor continued page 58 course RC model can sorts aerobatics real aircrafi can do.. Size am writing say thanks excellent article About Size Bradford Powers appeared 1/78 edition magazine Mr Powers presented material clear interesting manner yet supplied enough background equations logic make article value practical application Please let us see articles author others subject model aerody namics David U Zwolak Cincinnati OH Dream Site am 30 members Cen tour Radio Club East Liverpool Ohio club has picked up about 8 new members last 6 months May no field fly wrote head Parks Ohio asked permission RC club use part vast 22000 acres Ohio Beaver Creek State Park Old mills ground flour water over 100 years ago rolling hills etc park manager former Navy carrier pilot escorted us about 5 miles gave us nice field about 25 acres fly put log chains across entrance told us keep locked up avoid pot parties trouble before got members keys pad lock have nice place fly 1 mile nearest house Edwin H Orr East Liverpool OH Well Ill what its worth may offer following Two years ago test flying Wakefield al tube no file put up down R/L thrust did have rudder tab Because aircraft power stalling thought well put some right tab rudder Wind came up same next Sunday Following Sunday full power flights some ground After considerable thought about titude model powering up through air realized Am flying RR rudder tab set right As aircraft rolled right vertical tail slowly became stab What does aircraft down elevatordive comments Ive recd very good modelers Well Ill Don Eggersperger Redondo Beach CA Fairchild Ranger/Sauger continued page 17 half throttle full flaps slow fly-by about ttle about 10-mph headwind close scale fly ing speed possible Full flaps recom mended landings except strong winds means power landing As indicated earlier model will stay ground through rollout very little down trim Time dismantle Remove eight 4-40 screws Reach inside cabin unhook servo quick-release pushrods Squeeze two finger tabs slide out wing time Total time about three minutes little effort con struction youll apppreciate aes thetic value clean fuselage have simpler task storing certainly wish everyone success building flying Fairchild especially may consider graduating Sport Scale AMA appreciation owners N77661 Tom Leonhardt Dick Buck Jud Gud hous cooperation documenting April 1978 83 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 83, 84
Winner Best Scale IN RESEARCHING usually finds sometimes endin2 weak data photos i-vie Award hi remark U Stephen J ever project ni ending up fest itself Such Fairchild After cover EAA Sport N jilt either ft call made 60 miles distant ye Tom Leonhai day picture ns As carefu Left Steve Sterling Award won 77 Nats Award made top static points although plane must make official flight qualify Stinson Voyager won same award 1975 Above Separate wing panels preserve uninterrupted line fuselage top Panels easier build finish one-piece wingand simple attachment system fool-proof 8 Model Aviation Vegas enables normally tiown twoiols thought con cerningespecially important scaleri em strong order survivehand other keep em light because once hit its over anyway think can take credence both approaches depend ing particular type project pre fer former because first flight Las Vegas disaster flying along 10-feet altitude An airplane never should have taken off engine barely half throttle stubborn author insisted attempting fly against wishes able John Roth managed baby Fairchild air straight mounting plans n originai ma us servo bati yards no Otto turn mode e minimal nose cowl landing gear fairing plane back air hour completed two su flights highly doubt feasil lighter built construction practicality sacrificing strength prop erly designed model can inherit tremen dous strength simple techniques strength can induced needed no penalty weight model de signed along conventional lines fre quent references perspective sketches should help clarify prob lem areas y iii mble epoxy Cement vertical b*ih iction ment lywood Ut efore rizing yourself types wood cabin ubood -bal twoclear ance noics tor tneass tubing Secondly attachand epoxy two 015 brass plates tue 1/16 ply wood bottom before assembling sides After framing door opening fore stringers landing gear main fair ing 3/16 dowel compression strut can April1978 9 Rudder elevator s tion arrangement rudder moved bin floor accessible thro htn shows belicrank di Nyrod foreground plans show mo# red Nyrod pu igement resists Seen through di w&ng spars rele Good engineering thing Check give builder 10 Model ip servos mounted ca irn plan top view wing An ervos allow bottom hatch st balsa stwck struts 1 h 1 La ritA ce 5 four ovei e lf NOSE COWLI/B BALSADP2 PLANRINAC.PlOELEVATOR ABP12SOFTBALSACOSTS HORN CARVEFROM71 TAiLWSEER~ /1 15I SPRUCEIIPAIRING BATT ROT 44-B-SCABSRVOOESS ~eOcSA AVSSET 121z[S 005CC 1 IFI SAUNA SLOCEF. SCAR ROT FlMAPLE BLOCES I/IS PLTWTOO UF VEAR STRAPS TO MAPLE BLOCOS I/O ROLSR-l//1/ V S/S SAL S RP'BA LS V R-A- S IDES SVSA BALSA S/IS PLTRAVOBOTTOM fF98 P7U 5000CR CONTROL CARLES 2 SCOT F8 U F IIIi -T/TZ BALSA S TESU plo P9 __ I/S SOUSA PLANKING PASELASE CONNTRACTIONCABIN SIRES REPOSE FOSUESS STRINGERS LORINATE I/VT PLYWOCO LVBINATEOCARVEFROSA- / 00 ACETATE/ OTT ABS SALOOq~ Ii 0 0/ISI rr--SPRACESIFB1IP915F10Tfii /SWITOSIIu 50lJ- ELEVATOR OPSOCEIIRAOOES CARIN SITEU II/TO PLTSCSTOT- II IS FR0/TA SALGAP55 I TO GIS BRATS EPOR/ PATTT FIRESOLASS WHEEL PANTS BAR/C FOAT VALVES FAIRCHILD RANGER 24 OESIGBEO SNO OSRWN BRPLATE o.I/ATM SCALE -a M 0 5 -I 0 75i $ j cg1 FORM HIG ATASS US SHOWN TO ALIOE OVER OGO U ASSEMBLE SPRING I116 BALSA II CH TO P16 BHO-~ LIEW*O RTOHITr~IX SA WAW4j7ThWI BALSA WAW6WAW5 W4WW44W3iiW2 WAAIiz- p I IIIOHlrlTGGHHlFT B = I W NG TIPS ZTHTO BALSA TOTEr1116 BALSA SHEET fIII L GOLUCH 4 RLOCEN\ SCREW EPOGY TO SCREW 4 EPOHYP15 PLOWOOG RUPLE RLHCES TO i HAN PLORUOGTHT SO BALSA URRIT FROM AD TO WILEAPING EGUESSPRUCE WINA SPARS ___ ____ ____ Tz -— III IIIII 0II II-____ U — 0 ____—= ._____ ____ ______________IEHB -W4 W211W3G~PW4HTW4W4W4W5 IHB IHW6ANNANAW6W6 II_____TPLH.HIS OIA61 _______ MRAN\7 — 4AI1~ __ II~JI - I--_ PLAP SHIN RALSAFLAPRINSE TAPERES AS STOWSP15FORMICA LELEO BORN N1- IIWS II II II IITAPER EPHET TO TA SHEETTOTTAM SHEET FLATTENSOLSER RRUHS ORILL TAP FOR SILOER SHLGER W RB NWA BR TOT I-TO MNXXk/LI SWOO RRNRROE MNW-7HIS SHEET BALSA HH PA SO SPRUCETHIS TOWEL RING 4 SOLGERFIRERALAGS SOLUER OIT BRASSBRASS TARN EHOATOOPLTWHHO 4 UHIT THUGSSGLOCR 0I05AST FAIRCHILDRANGER 24 DESIHTED ANG ORGWN RTPLUTE IPX TO SCALEA OF 2 FULL-SIZE PLANS AVAILABLESEE PAGE 104 pHI WI WI 0 o WB Although scale m case about stringers gi involves cererug aetalung imary fuselage box visil simulated batter cabin detailing have inspect act Sport Scale pr o separates men hese details since ma nd off 10 feet exu single detail picture showath allo hole two 4-4C mounted tuselage no tI20 epoxied blind nuts 4-40 screv iventional foam d horizont er top tbi rudder Add a complete g made fror od wheel fox soldered 010 Sig eaIs attachir s tubing Notice epoxied Two flex rod c control steerable tail wheel turns rudder Gear A normal L lb load i pilot makes ngs Althot iaster u cra uld r wing tip sport oi 14 lv rr lay flue P keyh hold Dotai o stitchi~ mor ome some pant ar two nv 1/64detrain bent overvel tap Aut rch pailL pox transi th wire sm Ip IL screw anain Covering & FinishingmodellarUt C covered Sig silk except wood surfaces finished K&B resin primed auto-lacquer pri mer After brushing two coats butyrate clear thinned 50% silk surfaces pinking tape applied thinned white glue Rib stitching simulated applying beads Titebond tooth pick numerous methods simulating pinking tape problem pre-doped Silkspan tissue sharp Saran Wrap serrated edge still end up frayed edges found tracing vellum gives best definition does require pre-doping although little effort required adhere doped surface hence thinned white glue Spray additional two three coats clear over silk surfaces two coasts gray butyrate will make silk surfaces compatible tone wood surfaces finished gray lacquer primer succeeding coats yellow has poor covering qualities anyway will result match preparing wood surfaces polyester resin remember quality finished product will good shaping sanding done balsa wood may have flow resin sections cowl because its shape since tends run over sides Finish 400 wet-or-dry spray few coats gray auto-lacquer primer Sand completely off 300-400 wet-or-dry will notice primer begins fill low spots prefer sand dry since easier tell part paper used part clean use handy damp sponge wipe off dust resi due Final sanding should done 500-600 wet-or-dry paper attempt spray component time such fuselage stab rudder etc Otherwise will end up im proper coverage overspray runs etc Since fuselage tail dif ficult some sort fixture must made accommodate surfaces horizontal spray gun Visualize framework scrap furring strips built support rotate model such would barbecue spit now possible keep surfaces horizontal painting time rotate fuselage completely around ready apply second coat No two coats butyrate 24hour period Vinyl contact paper makes good masking stencil spraying numerals rudder Black pin striping accom either thin stick-on vinyl tape method want something permanent use #3 Rapidograph India ink designed use mylar film Spray dust coat two clear seal ink Cut template flat 030-040 ace tate windshield Cement place 16 Model Aviation landing gear again wing Struts SlIp cuff fastened posi tion Allen screws blind nuts Lower part telescoping main strut brass tubing Wilbold RC-56 white glue Make garnish trim molding 030 ABS flat stock paint before applying wind shield RC-56 glue Apply door window inside cut 3/16-thin rear window molding apply over rear window outside Door handles made either brass aluminum may made function can fixed case hook should epoxied inside door rubberband holding doors tight against fuselage exhaust stacks simulated eter Plastruct covered bright foil painted Flying Originally K&B 61 stalled beam mounts proximity exhaust stack inside cowl necessitated aluminum header right angles order route exhaust gases rearward No room expansion chamber created kinds over heating problems besides being able keep engine running final ap proach first four test flights ended up dead-stick landings suspected small cowl opening contributing factor overheated en gine later learn significant two culprits aluminum manifold created much back pressure exhaust gases no place go Additional room provided some sort expansion cham ber muffler Secondly air entering small opening became turbulent effectively cooling cylinder fins way through out bottom open ing maple beam mounts sawed off flush firewall using Kraft radial mount engine rotated front view far over possible po sition put cylinder behind cowl opening allowed design I-in diameter expansion tube muffler Fabri cate tin stock silver solder solve second problem required ex pertise some engine experts namely Big Al Adamisin Ron Plotske conclusion size cowl opening problem since exit opening certainly sufficient Air turbulent around cylinder passing through fins re quired since inside cowl got larger went rearward air tended favor inside shape Some sort baffle needed Borrowing earlier days speed simple alu minum baffle strapped around cyl inder forcing intake air go through fins out backside next practice session enjoyable first opportunity taxi back another takeoff K&B finally idl ing running properly model flew right off drawing board smooth ap plication power brings ship right up its main gear down elevator Normal flying done just over Continued page 83 April 1978 17 Lower portion rudder showing scale permanent trim tab Other points interest tail wheel fork fin fillet portion elevator fiiqht trim tab simulated rivets upper portion ruddenumeeis ou ted black No 3 Fa1 era lighting make hinge line visible out ordinary light baremy discernible Letters Editor continued page 58 course RC model can sorts aerobatics real aircrafi can do.. Size am writing say thanks excellent article About Size Bradford Powers appeared 1/78 edition magazine Mr Powers presented material clear interesting manner yet supplied enough background equations logic make article value practical application Please let us see articles author others subject model aerody namics David U Zwolak Cincinnati OH Dream Site am 30 members Cen tour Radio Club East Liverpool Ohio club has picked up about 8 new members last 6 months May no field fly wrote head Parks Ohio asked permission RC club use part vast 22000 acres Ohio Beaver Creek State Park Old mills ground flour water over 100 years ago rolling hills etc park manager former Navy carrier pilot escorted us about 5 miles gave us nice field about 25 acres fly put log chains across entrance told us keep locked up avoid pot parties trouble before got members keys pad lock have nice place fly 1 mile nearest house Edwin H Orr East Liverpool OH Well Ill what its worth may offer following Two years ago test flying Wakefield al tube no file put up down R/L thrust did have rudder tab Because aircraft power stalling thought well put some right tab rudder Wind came up same next Sunday Following Sunday full power flights some ground After considerable thought about titude model powering up through air realized Am flying RR rudder tab set right As aircraft rolled right vertical tail slowly became stab What does aircraft down elevatordive comments Ive recd very good modelers Well Ill Don Eggersperger Redondo Beach CA Fairchild Ranger/Sauger continued page 17 half throttle full flaps slow fly-by about ttle about 10-mph headwind close scale fly ing speed possible Full flaps recom mended landings except strong winds means power landing As indicated earlier model will stay ground through rollout very little down trim Time dismantle Remove eight 4-40 screws Reach inside cabin unhook servo quick-release pushrods Squeeze two finger tabs slide out wing time Total time about three minutes little effort con struction youll apppreciate aes thetic value clean fuselage have simpler task storing certainly wish everyone success building flying Fairchild especially may consider graduating Sport Scale AMA appreciation owners N77661 Tom Leonhardt Dick Buck Jud Gud hous cooperation documenting April 1978 83 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 83, 84
Winner Best Scale IN RESEARCHING usually finds sometimes endin2 weak data photos i-vie Award hi remark U Stephen J ever project ni ending up fest itself Such Fairchild After cover EAA Sport N jilt either ft call made 60 miles distant ye Tom Leonhai day picture ns As carefu Left Steve Sterling Award won 77 Nats Award made top static points although plane must make official flight qualify Stinson Voyager won same award 1975 Above Separate wing panels preserve uninterrupted line fuselage top Panels easier build finish one-piece wingand simple attachment system fool-proof 8 Model Aviation Vegas enables normally tiown twoiols thought con cerningespecially important scaleri em strong order survivehand other keep em light because once hit its over anyway think can take credence both approaches depend ing particular type project pre fer former because first flight Las Vegas disaster flying along 10-feet altitude An airplane never should have taken off engine barely half throttle stubborn author insisted attempting fly against wishes able John Roth managed baby Fairchild air straight mounting plans n originai ma us servo bati yards no Otto turn mode e minimal nose cowl landing gear fairing plane back air hour completed two su flights highly doubt feasil lighter built construction practicality sacrificing strength prop erly designed model can inherit tremen dous strength simple techniques strength can induced needed no penalty weight model de signed along conventional lines fre quent references perspective sketches should help clarify prob lem areas y iii mble epoxy Cement vertical b*ih iction ment lywood Ut efore rizing yourself types wood cabin ubood -bal twoclear ance noics tor tneass tubing Secondly attachand epoxy two 015 brass plates tue 1/16 ply wood bottom before assembling sides After framing door opening fore stringers landing gear main fair ing 3/16 dowel compression strut can April1978 9 Rudder elevator s tion arrangement rudder moved bin floor accessible thro htn shows belicrank di Nyrod foreground plans show mo# red Nyrod pu igement resists Seen through di w&ng spars rele Good engineering thing Check give builder 10 Model ip servos mounted ca irn plan top view wing An ervos allow bottom hatch st balsa stwck struts 1 h 1 La ritA ce 5 four ovei e lf NOSE COWLI/B BALSADP2 PLANRINAC.PlOELEVATOR ABP12SOFTBALSACOSTS HORN CARVEFROM71 TAiLWSEER~ /1 15I SPRUCEIIPAIRING BATT ROT 44-B-SCABSRVOOESS ~eOcSA AVSSET 121z[S 005CC 1 IFI SAUNA SLOCEF. SCAR ROT FlMAPLE BLOCES I/IS PLTWTOO UF VEAR STRAPS TO MAPLE BLOCOS I/O ROLSR-l//1/ V S/S SAL S RP'BA LS V R-A- S IDES SVSA BALSA S/IS PLTRAVOBOTTOM fF98 P7U 5000CR CONTROL CARLES 2 SCOT F8 U F IIIi -T/TZ BALSA S TESU plo P9 __ I/S SOUSA PLANKING PASELASE CONNTRACTIONCABIN SIRES REPOSE FOSUESS STRINGERS LORINATE I/VT PLYWOCO LVBINATEOCARVEFROSA- / 00 ACETATE/ OTT ABS SALOOq~ Ii 0 0/ISI rr--SPRACESIFB1IP915F10Tfii /SWITOSIIu 50lJ- ELEVATOR OPSOCEIIRAOOES CARIN SITEU II/TO PLTSCSTOT- II IS FR0/TA SALGAP55 I TO GIS BRATS EPOR/ PATTT FIRESOLASS WHEEL PANTS BAR/C FOAT VALVES FAIRCHILD RANGER 24 OESIGBEO SNO OSRWN BRPLATE o.I/ATM SCALE -a M 0 5 -I 0 75i $ j cg1 FORM HIG ATASS US SHOWN TO ALIOE OVER OGO U ASSEMBLE SPRING I116 BALSA II CH TO P16 BHO-~ LIEW*O RTOHITr~IX SA WAW4j7ThWI BALSA WAW6WAW5 W4WW44W3iiW2 WAAIiz- p I IIIOHlrlTGGHHlFT B = I W NG TIPS ZTHTO BALSA TOTEr1116 BALSA SHEET fIII L GOLUCH 4 RLOCEN\ SCREW EPOGY TO SCREW 4 EPOHYP15 PLOWOOG RUPLE RLHCES TO i HAN PLORUOGTHT SO BALSA URRIT FROM AD TO WILEAPING EGUESSPRUCE WINA SPARS ___ ____ ____ Tz -— III IIIII 0II II-____ U — 0 ____—= ._____ ____ ______________IEHB -W4 W211W3G~PW4HTW4W4W4W5 IHB IHW6ANNANAW6W6 II_____TPLH.HIS OIA61 _______ MRAN\7 — 4AI1~ __ II~JI - I--_ PLAP SHIN RALSAFLAPRINSE TAPERES AS STOWSP15FORMICA LELEO BORN N1- IIWS II II II IITAPER EPHET TO TA SHEETTOTTAM SHEET FLATTENSOLSER RRUHS ORILL TAP FOR SILOER SHLGER W RB NWA BR TOT I-TO MNXXk/LI SWOO RRNRROE MNW-7HIS SHEET BALSA HH PA SO SPRUCETHIS TOWEL RING 4 SOLGERFIRERALAGS SOLUER OIT BRASSBRASS TARN EHOATOOPLTWHHO 4 UHIT THUGSSGLOCR 0I05AST FAIRCHILDRANGER 24 DESIHTED ANG ORGWN RTPLUTE IPX TO SCALEA OF 2 FULL-SIZE PLANS AVAILABLESEE PAGE 104 pHI WI WI 0 o WB Although scale m case about stringers gi involves cererug aetalung imary fuselage box visil simulated batter cabin detailing have inspect act Sport Scale pr o separates men hese details since ma nd off 10 feet exu single detail picture showath allo hole two 4-4C mounted tuselage no tI20 epoxied blind nuts 4-40 screv iventional foam d horizont er top tbi rudder Add a complete g made fror od wheel fox soldered 010 Sig eaIs attachir s tubing Notice epoxied Two flex rod c control steerable tail wheel turns rudder Gear A normal L lb load i pilot makes ngs Althot iaster u cra uld r wing tip sport oi 14 lv rr lay flue P keyh hold Dotai o stitchi~ mor ome some pant ar two nv 1/64detrain bent overvel tap Aut rch pailL pox transi th wire sm Ip IL screw anain Covering & FinishingmodellarUt C covered Sig silk except wood surfaces finished K&B resin primed auto-lacquer pri mer After brushing two coats butyrate clear thinned 50% silk surfaces pinking tape applied thinned white glue Rib stitching simulated applying beads Titebond tooth pick numerous methods simulating pinking tape problem pre-doped Silkspan tissue sharp Saran Wrap serrated edge still end up frayed edges found tracing vellum gives best definition does require pre-doping although little effort required adhere doped surface hence thinned white glue Spray additional two three coats clear over silk surfaces two coasts gray butyrate will make silk surfaces compatible tone wood surfaces finished gray lacquer primer succeeding coats yellow has poor covering qualities anyway will result match preparing wood surfaces polyester resin remember quality finished product will good shaping sanding done balsa wood may have flow resin sections cowl because its shape since tends run over sides Finish 400 wet-or-dry spray few coats gray auto-lacquer primer Sand completely off 300-400 wet-or-dry will notice primer begins fill low spots prefer sand dry since easier tell part paper used part clean use handy damp sponge wipe off dust resi due Final sanding should done 500-600 wet-or-dry paper attempt spray component time such fuselage stab rudder etc Otherwise will end up im proper coverage overspray runs etc Since fuselage tail dif ficult some sort fixture must made accommodate surfaces horizontal spray gun Visualize framework scrap furring strips built support rotate model such would barbecue spit now possible keep surfaces horizontal painting time rotate fuselage completely around ready apply second coat No two coats butyrate 24hour period Vinyl contact paper makes good masking stencil spraying numerals rudder Black pin striping accom either thin stick-on vinyl tape method want something permanent use #3 Rapidograph India ink designed use mylar film Spray dust coat two clear seal ink Cut template flat 030-040 ace tate windshield Cement place 16 Model Aviation landing gear again wing Struts SlIp cuff fastened posi tion Allen screws blind nuts Lower part telescoping main strut brass tubing Wilbold RC-56 white glue Make garnish trim molding 030 ABS flat stock paint before applying wind shield RC-56 glue Apply door window inside cut 3/16-thin rear window molding apply over rear window outside Door handles made either brass aluminum may made function can fixed case hook should epoxied inside door rubberband holding doors tight against fuselage exhaust stacks simulated eter Plastruct covered bright foil painted Flying Originally K&B 61 stalled beam mounts proximity exhaust stack inside cowl necessitated aluminum header right angles order route exhaust gases rearward No room expansion chamber created kinds over heating problems besides being able keep engine running final ap proach first four test flights ended up dead-stick landings suspected small cowl opening contributing factor overheated en gine later learn significant two culprits aluminum manifold created much back pressure exhaust gases no place go Additional room provided some sort expansion cham ber muffler Secondly air entering small opening became turbulent effectively cooling cylinder fins way through out bottom open ing maple beam mounts sawed off flush firewall using Kraft radial mount engine rotated front view far over possible po sition put cylinder behind cowl opening allowed design I-in diameter expansion tube muffler Fabri cate tin stock silver solder solve second problem required ex pertise some engine experts namely Big Al Adamisin Ron Plotske conclusion size cowl opening problem since exit opening certainly sufficient Air turbulent around cylinder passing through fins re quired since inside cowl got larger went rearward air tended favor inside shape Some sort baffle needed Borrowing earlier days speed simple alu minum baffle strapped around cyl inder forcing intake air go through fins out backside next practice session enjoyable first opportunity taxi back another takeoff K&B finally idl ing running properly model flew right off drawing board smooth ap plication power brings ship right up its main gear down elevator Normal flying done just over Continued page 83 April 1978 17 Lower portion rudder showing scale permanent trim tab Other points interest tail wheel fork fin fillet portion elevator fiiqht trim tab simulated rivets upper portion ruddenumeeis ou ted black No 3 Fa1 era lighting make hinge line visible out ordinary light baremy discernible Letters Editor continued page 58 course RC model can sorts aerobatics real aircrafi can do.. Size am writing say thanks excellent article About Size Bradford Powers appeared 1/78 edition magazine Mr Powers presented material clear interesting manner yet supplied enough background equations logic make article value practical application Please let us see articles author others subject model aerody namics David U Zwolak Cincinnati OH Dream Site am 30 members Cen tour Radio Club East Liverpool Ohio club has picked up about 8 new members last 6 months May no field fly wrote head Parks Ohio asked permission RC club use part vast 22000 acres Ohio Beaver Creek State Park Old mills ground flour water over 100 years ago rolling hills etc park manager former Navy carrier pilot escorted us about 5 miles gave us nice field about 25 acres fly put log chains across entrance told us keep locked up avoid pot parties trouble before got members keys pad lock have nice place fly 1 mile nearest house Edwin H Orr East Liverpool OH Well Ill what its worth may offer following Two years ago test flying Wakefield al tube no file put up down R/L thrust did have rudder tab Because aircraft power stalling thought well put some right tab rudder Wind came up same next Sunday Following Sunday full power flights some ground After considerable thought about titude model powering up through air realized Am flying RR rudder tab set right As aircraft rolled right vertical tail slowly became stab What does aircraft down elevatordive comments Ive recd very good modelers Well Ill Don Eggersperger Redondo Beach CA Fairchild Ranger/Sauger continued page 17 half throttle full flaps slow fly-by about ttle about 10-mph headwind close scale fly ing speed possible Full flaps recom mended landings except strong winds means power landing As indicated earlier model will stay ground through rollout very little down trim Time dismantle Remove eight 4-40 screws Reach inside cabin unhook servo quick-release pushrods Squeeze two finger tabs slide out wing time Total time about three minutes little effort con struction youll apppreciate aes thetic value clean fuselage have simpler task storing certainly wish everyone success building flying Fairchild especially may consider graduating Sport Scale AMA appreciation owners N77661 Tom Leonhardt Dick Buck Jud Gud hous cooperation documenting April 1978 83 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 83, 84
Winner Best Scale IN RESEARCHING usually finds sometimes endin2 weak data photos i-vie Award hi remark U Stephen J ever project ni ending up fest itself Such Fairchild After cover EAA Sport N jilt either ft call made 60 miles distant ye Tom Leonhai day picture ns As carefu Left Steve Sterling Award won 77 Nats Award made top static points although plane must make official flight qualify Stinson Voyager won same award 1975 Above Separate wing panels preserve uninterrupted line fuselage top Panels easier build finish one-piece wingand simple attachment system fool-proof 8 Model Aviation Vegas enables normally tiown twoiols thought con cerningespecially important scaleri em strong order survivehand other keep em light because once hit its over anyway think can take credence both approaches depend ing particular type project pre fer former because first flight Las Vegas disaster flying along 10-feet altitude An airplane never should have taken off engine barely half throttle stubborn author insisted attempting fly against wishes able John Roth managed baby Fairchild air straight mounting plans n originai ma us servo bati yards no Otto turn mode e minimal nose cowl landing gear fairing plane back air hour completed two su flights highly doubt feasil lighter built construction practicality sacrificing strength prop erly designed model can inherit tremen dous strength simple techniques strength can induced needed no penalty weight model de signed along conventional lines fre quent references perspective sketches should help clarify prob lem areas y iii mble epoxy Cement vertical b*ih iction ment lywood Ut efore rizing yourself types wood cabin ubood -bal twoclear ance noics tor tneass tubing Secondly attachand epoxy two 015 brass plates tue 1/16 ply wood bottom before assembling sides After framing door opening fore stringers landing gear main fair ing 3/16 dowel compression strut can April1978 9 Rudder elevator s tion arrangement rudder moved bin floor accessible thro htn shows belicrank di Nyrod foreground plans show mo# red Nyrod pu igement resists Seen through di w&ng spars rele Good engineering thing Check give builder 10 Model ip servos mounted ca irn plan top view wing An ervos allow bottom hatch st balsa stwck struts 1 h 1 La ritA ce 5 four ovei e lf NOSE COWLI/B BALSADP2 PLANRINAC.PlOELEVATOR ABP12SOFTBALSACOSTS HORN CARVEFROM71 TAiLWSEER~ /1 15I SPRUCEIIPAIRING BATT ROT 44-B-SCABSRVOOESS ~eOcSA AVSSET 121z[S 005CC 1 IFI SAUNA SLOCEF. SCAR ROT FlMAPLE BLOCES I/IS PLTWTOO UF VEAR STRAPS TO MAPLE BLOCOS I/O ROLSR-l//1/ V S/S SAL S RP'BA LS V R-A- S IDES SVSA BALSA S/IS PLTRAVOBOTTOM fF98 P7U 5000CR CONTROL CARLES 2 SCOT F8 U F IIIi -T/TZ BALSA S TESU plo P9 __ I/S SOUSA PLANKING PASELASE CONNTRACTIONCABIN SIRES REPOSE FOSUESS STRINGERS LORINATE I/VT PLYWOCO LVBINATEOCARVEFROSA- / 00 ACETATE/ OTT ABS SALOOq~ Ii 0 0/ISI rr--SPRACESIFB1IP915F10Tfii /SWITOSIIu 50lJ- ELEVATOR OPSOCEIIRAOOES CARIN SITEU II/TO PLTSCSTOT- II IS FR0/TA SALGAP55 I TO GIS BRATS EPOR/ PATTT FIRESOLASS WHEEL PANTS BAR/C FOAT VALVES FAIRCHILD RANGER 24 OESIGBEO SNO OSRWN BRPLATE o.I/ATM SCALE -a M 0 5 -I 0 75i $ j cg1 FORM HIG ATASS US SHOWN TO ALIOE OVER OGO U ASSEMBLE SPRING I116 BALSA II CH TO P16 BHO-~ LIEW*O RTOHITr~IX SA WAW4j7ThWI BALSA WAW6WAW5 W4WW44W3iiW2 WAAIiz- p I IIIOHlrlTGGHHlFT B = I W NG TIPS ZTHTO BALSA TOTEr1116 BALSA SHEET fIII L GOLUCH 4 RLOCEN\ SCREW EPOGY TO SCREW 4 EPOHYP15 PLOWOOG RUPLE RLHCES TO i HAN PLORUOGTHT SO BALSA URRIT FROM AD TO WILEAPING EGUESSPRUCE WINA SPARS ___ ____ ____ Tz -— III IIIII 0II II-____ U — 0 ____—= ._____ ____ ______________IEHB -W4 W211W3G~PW4HTW4W4W4W5 IHB IHW6ANNANAW6W6 II_____TPLH.HIS OIA61 _______ MRAN\7 — 4AI1~ __ II~JI - I--_ PLAP SHIN RALSAFLAPRINSE TAPERES AS STOWSP15FORMICA LELEO BORN N1- IIWS II II II IITAPER EPHET TO TA SHEETTOTTAM SHEET FLATTENSOLSER RRUHS ORILL TAP FOR SILOER SHLGER W RB NWA BR TOT I-TO MNXXk/LI SWOO RRNRROE MNW-7HIS SHEET BALSA HH PA SO SPRUCETHIS TOWEL RING 4 SOLGERFIRERALAGS SOLUER OIT BRASSBRASS TARN EHOATOOPLTWHHO 4 UHIT THUGSSGLOCR 0I05AST FAIRCHILDRANGER 24 DESIHTED ANG ORGWN RTPLUTE IPX TO SCALEA OF 2 FULL-SIZE PLANS AVAILABLESEE PAGE 104 pHI WI WI 0 o WB Although scale m case about stringers gi involves cererug aetalung imary fuselage box visil simulated batter cabin detailing have inspect act Sport Scale pr o separates men hese details since ma nd off 10 feet exu single detail picture showath allo hole two 4-4C mounted tuselage no tI20 epoxied blind nuts 4-40 screv iventional foam d horizont er top tbi rudder Add a complete g made fror od wheel fox soldered 010 Sig eaIs attachir s tubing Notice epoxied Two flex rod c control steerable tail wheel turns rudder Gear A normal L lb load i pilot makes ngs Althot iaster u cra uld r wing tip sport oi 14 lv rr lay flue P keyh hold Dotai o stitchi~ mor ome some pant ar two nv 1/64detrain bent overvel tap Aut rch pailL pox transi th wire sm Ip IL screw anain Covering & FinishingmodellarUt C covered Sig silk except wood surfaces finished K&B resin primed auto-lacquer pri mer After brushing two coats butyrate clear thinned 50% silk surfaces pinking tape applied thinned white glue Rib stitching simulated applying beads Titebond tooth pick numerous methods simulating pinking tape problem pre-doped Silkspan tissue sharp Saran Wrap serrated edge still end up frayed edges found tracing vellum gives best definition does require pre-doping although little effort required adhere doped surface hence thinned white glue Spray additional two three coats clear over silk surfaces two coasts gray butyrate will make silk surfaces compatible tone wood surfaces finished gray lacquer primer succeeding coats yellow has poor covering qualities anyway will result match preparing wood surfaces polyester resin remember quality finished product will good shaping sanding done balsa wood may have flow resin sections cowl because its shape since tends run over sides Finish 400 wet-or-dry spray few coats gray auto-lacquer primer Sand completely off 300-400 wet-or-dry will notice primer begins fill low spots prefer sand dry since easier tell part paper used part clean use handy damp sponge wipe off dust resi due Final sanding should done 500-600 wet-or-dry paper attempt spray component time such fuselage stab rudder etc Otherwise will end up im proper coverage overspray runs etc Since fuselage tail dif ficult some sort fixture must made accommodate surfaces horizontal spray gun Visualize framework scrap furring strips built support rotate model such would barbecue spit now possible keep surfaces horizontal painting time rotate fuselage completely around ready apply second coat No two coats butyrate 24hour period Vinyl contact paper makes good masking stencil spraying numerals rudder Black pin striping accom either thin stick-on vinyl tape method want something permanent use #3 Rapidograph India ink designed use mylar film Spray dust coat two clear seal ink Cut template flat 030-040 ace tate windshield Cement place 16 Model Aviation landing gear again wing Struts SlIp cuff fastened posi tion Allen screws blind nuts Lower part telescoping main strut brass tubing Wilbold RC-56 white glue Make garnish trim molding 030 ABS flat stock paint before applying wind shield RC-56 glue Apply door window inside cut 3/16-thin rear window molding apply over rear window outside Door handles made either brass aluminum may made function can fixed case hook should epoxied inside door rubberband holding doors tight against fuselage exhaust stacks simulated eter Plastruct covered bright foil painted Flying Originally K&B 61 stalled beam mounts proximity exhaust stack inside cowl necessitated aluminum header right angles order route exhaust gases rearward No room expansion chamber created kinds over heating problems besides being able keep engine running final ap proach first four test flights ended up dead-stick landings suspected small cowl opening contributing factor overheated en gine later learn significant two culprits aluminum manifold created much back pressure exhaust gases no place go Additional room provided some sort expansion cham ber muffler Secondly air entering small opening became turbulent effectively cooling cylinder fins way through out bottom open ing maple beam mounts sawed off flush firewall using Kraft radial mount engine rotated front view far over possible po sition put cylinder behind cowl opening allowed design I-in diameter expansion tube muffler Fabri cate tin stock silver solder solve second problem required ex pertise some engine experts namely Big Al Adamisin Ron Plotske conclusion size cowl opening problem since exit opening certainly sufficient Air turbulent around cylinder passing through fins re quired since inside cowl got larger went rearward air tended favor inside shape Some sort baffle needed Borrowing earlier days speed simple alu minum baffle strapped around cyl inder forcing intake air go through fins out backside next practice session enjoyable first opportunity taxi back another takeoff K&B finally idl ing running properly model flew right off drawing board smooth ap plication power brings ship right up its main gear down elevator Normal flying done just over Continued page 83 April 1978 17 Lower portion rudder showing scale permanent trim tab Other points interest tail wheel fork fin fillet portion elevator fiiqht trim tab simulated rivets upper portion ruddenumeeis ou ted black No 3 Fa1 era lighting make hinge line visible out ordinary light baremy discernible Letters Editor continued page 58 course RC model can sorts aerobatics real aircrafi can do.. Size am writing say thanks excellent article About Size Bradford Powers appeared 1/78 edition magazine Mr Powers presented material clear interesting manner yet supplied enough background equations logic make article value practical application Please let us see articles author others subject model aerody namics David U Zwolak Cincinnati OH Dream Site am 30 members Cen tour Radio Club East Liverpool Ohio club has picked up about 8 new members last 6 months May no field fly wrote head Parks Ohio asked permission RC club use part vast 22000 acres Ohio Beaver Creek State Park Old mills ground flour water over 100 years ago rolling hills etc park manager former Navy carrier pilot escorted us about 5 miles gave us nice field about 25 acres fly put log chains across entrance told us keep locked up avoid pot parties trouble before got members keys pad lock have nice place fly 1 mile nearest house Edwin H Orr East Liverpool OH Well Ill what its worth may offer following Two years ago test flying Wakefield al tube no file put up down R/L thrust did have rudder tab Because aircraft power stalling thought well put some right tab rudder Wind came up same next Sunday Following Sunday full power flights some ground After considerable thought about titude model powering up through air realized Am flying RR rudder tab set right As aircraft rolled right vertical tail slowly became stab What does aircraft down elevatordive comments Ive recd very good modelers Well Ill Don Eggersperger Redondo Beach CA Fairchild Ranger/Sauger continued page 17 half throttle full flaps slow fly-by about ttle about 10-mph headwind close scale fly ing speed possible Full flaps recom mended landings except strong winds means power landing As indicated earlier model will stay ground through rollout very little down trim Time dismantle Remove eight 4-40 screws Reach inside cabin unhook servo quick-release pushrods Squeeze two finger tabs slide out wing time Total time about three minutes little effort con struction youll apppreciate aes thetic value clean fuselage have simpler task storing certainly wish everyone success building flying Fairchild especially may consider graduating Sport Scale AMA appreciation owners N77661 Tom Leonhardt Dick Buck Jud Gud hous cooperation documenting April 1978 83 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 83, 84
Winner Best Scale IN RESEARCHING usually finds sometimes endin2 weak data photos i-vie Award hi remark U Stephen J ever project ni ending up fest itself Such Fairchild After cover EAA Sport N jilt either ft call made 60 miles distant ye Tom Leonhai day picture ns As carefu Left Steve Sterling Award won 77 Nats Award made top static points although plane must make official flight qualify Stinson Voyager won same award 1975 Above Separate wing panels preserve uninterrupted line fuselage top Panels easier build finish one-piece wingand simple attachment system fool-proof 8 Model Aviation Vegas enables normally tiown twoiols thought con cerningespecially important scaleri em strong order survivehand other keep em light because once hit its over anyway think can take credence both approaches depend ing particular type project pre fer former because first flight Las Vegas disaster flying along 10-feet altitude An airplane never should have taken off engine barely half throttle stubborn author insisted attempting fly against wishes able John Roth managed baby Fairchild air straight mounting plans n originai ma us servo bati yards no Otto turn mode e minimal nose cowl landing gear fairing plane back air hour completed two su flights highly doubt feasil lighter built construction practicality sacrificing strength prop erly designed model can inherit tremen dous strength simple techniques strength can induced needed no penalty weight model de signed along conventional lines fre quent references perspective sketches should help clarify prob lem areas y iii mble epoxy Cement vertical b*ih iction ment lywood Ut efore rizing yourself types wood cabin ubood -bal twoclear ance noics tor tneass tubing Secondly attachand epoxy two 015 brass plates tue 1/16 ply wood bottom before assembling sides After framing door opening fore stringers landing gear main fair ing 3/16 dowel compression strut can April1978 9 Rudder elevator s tion arrangement rudder moved bin floor accessible thro htn shows belicrank di Nyrod foreground plans show mo# red Nyrod pu igement resists Seen through di w&ng spars rele Good engineering thing Check give builder 10 Model ip servos mounted ca irn plan top view wing An ervos allow bottom hatch st balsa stwck struts 1 h 1 La ritA ce 5 four ovei e lf NOSE COWLI/B BALSADP2 PLANRINAC.PlOELEVATOR ABP12SOFTBALSACOSTS HORN CARVEFROM71 TAiLWSEER~ /1 15I SPRUCEIIPAIRING BATT ROT 44-B-SCABSRVOOESS ~eOcSA AVSSET 121z[S 005CC 1 IFI SAUNA SLOCEF. SCAR ROT FlMAPLE BLOCES I/IS PLTWTOO UF VEAR STRAPS TO MAPLE BLOCOS I/O ROLSR-l//1/ V S/S SAL S RP'BA LS V R-A- S IDES SVSA BALSA S/IS PLTRAVOBOTTOM fF98 P7U 5000CR CONTROL CARLES 2 SCOT F8 U F IIIi -T/TZ BALSA S TESU plo P9 __ I/S SOUSA PLANKING PASELASE CONNTRACTIONCABIN SIRES REPOSE FOSUESS STRINGERS LORINATE I/VT PLYWOCO LVBINATEOCARVEFROSA- / 00 ACETATE/ OTT ABS SALOOq~ Ii 0 0/ISI rr--SPRACESIFB1IP915F10Tfii /SWITOSIIu 50lJ- ELEVATOR OPSOCEIIRAOOES CARIN SITEU II/TO PLTSCSTOT- II IS FR0/TA SALGAP55 I TO GIS BRATS EPOR/ PATTT FIRESOLASS WHEEL PANTS BAR/C FOAT VALVES FAIRCHILD RANGER 24 OESIGBEO SNO OSRWN BRPLATE o.I/ATM SCALE -a M 0 5 -I 0 75i $ j cg1 FORM HIG ATASS US SHOWN TO ALIOE OVER OGO U ASSEMBLE SPRING I116 BALSA II CH TO P16 BHO-~ LIEW*O RTOHITr~IX SA WAW4j7ThWI BALSA WAW6WAW5 W4WW44W3iiW2 WAAIiz- p I IIIOHlrlTGGHHlFT B = I W NG TIPS ZTHTO BALSA TOTEr1116 BALSA SHEET fIII L GOLUCH 4 RLOCEN\ SCREW EPOGY TO SCREW 4 EPOHYP15 PLOWOOG RUPLE RLHCES TO i HAN PLORUOGTHT SO BALSA URRIT FROM AD TO WILEAPING EGUESSPRUCE WINA SPARS ___ ____ ____ Tz -— III IIIII 0II II-____ U — 0 ____—= ._____ ____ ______________IEHB -W4 W211W3G~PW4HTW4W4W4W5 IHB IHW6ANNANAW6W6 II_____TPLH.HIS OIA61 _______ MRAN\7 — 4AI1~ __ II~JI - I--_ PLAP SHIN RALSAFLAPRINSE TAPERES AS STOWSP15FORMICA LELEO BORN N1- IIWS II II II IITAPER EPHET TO TA SHEETTOTTAM SHEET FLATTENSOLSER RRUHS ORILL TAP FOR SILOER SHLGER W RB NWA BR TOT I-TO MNXXk/LI SWOO RRNRROE MNW-7HIS SHEET BALSA HH PA SO SPRUCETHIS TOWEL RING 4 SOLGERFIRERALAGS SOLUER OIT BRASSBRASS TARN EHOATOOPLTWHHO 4 UHIT THUGSSGLOCR 0I05AST FAIRCHILDRANGER 24 DESIHTED ANG ORGWN RTPLUTE IPX TO SCALEA OF 2 FULL-SIZE PLANS AVAILABLESEE PAGE 104 pHI WI WI 0 o WB Although scale m case about stringers gi involves cererug aetalung imary fuselage box visil simulated batter cabin detailing have inspect act Sport Scale pr o separates men hese details since ma nd off 10 feet exu single detail picture showath allo hole two 4-4C mounted tuselage no tI20 epoxied blind nuts 4-40 screv iventional foam d horizont er top tbi rudder Add a complete g made fror od wheel fox soldered 010 Sig eaIs attachir s tubing Notice epoxied Two flex rod c control steerable tail wheel turns rudder Gear A normal L lb load i pilot makes ngs Althot iaster u cra uld r wing tip sport oi 14 lv rr lay flue P keyh hold Dotai o stitchi~ mor ome some pant ar two nv 1/64detrain bent overvel tap Aut rch pailL pox transi th wire sm Ip IL screw anain Covering & FinishingmodellarUt C covered Sig silk except wood surfaces finished K&B resin primed auto-lacquer pri mer After brushing two coats butyrate clear thinned 50% silk surfaces pinking tape applied thinned white glue Rib stitching simulated applying beads Titebond tooth pick numerous methods simulating pinking tape problem pre-doped Silkspan tissue sharp Saran Wrap serrated edge still end up frayed edges found tracing vellum gives best definition does require pre-doping although little effort required adhere doped surface hence thinned white glue Spray additional two three coats clear over silk surfaces two coasts gray butyrate will make silk surfaces compatible tone wood surfaces finished gray lacquer primer succeeding coats yellow has poor covering qualities anyway will result match preparing wood surfaces polyester resin remember quality finished product will good shaping sanding done balsa wood may have flow resin sections cowl because its shape since tends run over sides Finish 400 wet-or-dry spray few coats gray auto-lacquer primer Sand completely off 300-400 wet-or-dry will notice primer begins fill low spots prefer sand dry since easier tell part paper used part clean use handy damp sponge wipe off dust resi due Final sanding should done 500-600 wet-or-dry paper attempt spray component time such fuselage stab rudder etc Otherwise will end up im proper coverage overspray runs etc Since fuselage tail dif ficult some sort fixture must made accommodate surfaces horizontal spray gun Visualize framework scrap furring strips built support rotate model such would barbecue spit now possible keep surfaces horizontal painting time rotate fuselage completely around ready apply second coat No two coats butyrate 24hour period Vinyl contact paper makes good masking stencil spraying numerals rudder Black pin striping accom either thin stick-on vinyl tape method want something permanent use #3 Rapidograph India ink designed use mylar film Spray dust coat two clear seal ink Cut template flat 030-040 ace tate windshield Cement place 16 Model Aviation landing gear again wing Struts SlIp cuff fastened posi tion Allen screws blind nuts Lower part telescoping main strut brass tubing Wilbold RC-56 white glue Make garnish trim molding 030 ABS flat stock paint before applying wind shield RC-56 glue Apply door window inside cut 3/16-thin rear window molding apply over rear window outside Door handles made either brass aluminum may made function can fixed case hook should epoxied inside door rubberband holding doors tight against fuselage exhaust stacks simulated eter Plastruct covered bright foil painted Flying Originally K&B 61 stalled beam mounts proximity exhaust stack inside cowl necessitated aluminum header right angles order route exhaust gases rearward No room expansion chamber created kinds over heating problems besides being able keep engine running final ap proach first four test flights ended up dead-stick landings suspected small cowl opening contributing factor overheated en gine later learn significant two culprits aluminum manifold created much back pressure exhaust gases no place go Additional room provided some sort expansion cham ber muffler Secondly air entering small opening became turbulent effectively cooling cylinder fins way through out bottom open ing maple beam mounts sawed off flush firewall using Kraft radial mount engine rotated front view far over possible po sition put cylinder behind cowl opening allowed design I-in diameter expansion tube muffler Fabri cate tin stock silver solder solve second problem required ex pertise some engine experts namely Big Al Adamisin Ron Plotske conclusion size cowl opening problem since exit opening certainly sufficient Air turbulent around cylinder passing through fins re quired since inside cowl got larger went rearward air tended favor inside shape Some sort baffle needed Borrowing earlier days speed simple alu minum baffle strapped around cyl inder forcing intake air go through fins out backside next practice session enjoyable first opportunity taxi back another takeoff K&B finally idl ing running properly model flew right off drawing board smooth ap plication power brings ship right up its main gear down elevator Normal flying done just over Continued page 83 April 1978 17 Lower portion rudder showing scale permanent trim tab Other points interest tail wheel fork fin fillet portion elevator fiiqht trim tab simulated rivets upper portion ruddenumeeis ou ted black No 3 Fa1 era lighting make hinge line visible out ordinary light baremy discernible Letters Editor continued page 58 course RC model can sorts aerobatics real aircrafi can do.. Size am writing say thanks excellent article About Size Bradford Powers appeared 1/78 edition magazine Mr Powers presented material clear interesting manner yet supplied enough background equations logic make article value practical application Please let us see articles author others subject model aerody namics David U Zwolak Cincinnati OH Dream Site am 30 members Cen tour Radio Club East Liverpool Ohio club has picked up about 8 new members last 6 months May no field fly wrote head Parks Ohio asked permission RC club use part vast 22000 acres Ohio Beaver Creek State Park Old mills ground flour water over 100 years ago rolling hills etc park manager former Navy carrier pilot escorted us about 5 miles gave us nice field about 25 acres fly put log chains across entrance told us keep locked up avoid pot parties trouble before got members keys pad lock have nice place fly 1 mile nearest house Edwin H Orr East Liverpool OH Well Ill what its worth may offer following Two years ago test flying Wakefield al tube no file put up down R/L thrust did have rudder tab Because aircraft power stalling thought well put some right tab rudder Wind came up same next Sunday Following Sunday full power flights some ground After considerable thought about titude model powering up through air realized Am flying RR rudder tab set right As aircraft rolled right vertical tail slowly became stab What does aircraft down elevatordive comments Ive recd very good modelers Well Ill Don Eggersperger Redondo Beach CA Fairchild Ranger/Sauger continued page 17 half throttle full flaps slow fly-by about ttle about 10-mph headwind close scale fly ing speed possible Full flaps recom mended landings except strong winds means power landing As indicated earlier model will stay ground through rollout very little down trim Time dismantle Remove eight 4-40 screws Reach inside cabin unhook servo quick-release pushrods Squeeze two finger tabs slide out wing time Total time about three minutes little effort con struction youll apppreciate aes thetic value clean fuselage have simpler task storing certainly wish everyone success building flying Fairchild especially may consider graduating Sport Scale AMA appreciation owners N77661 Tom Leonhardt Dick Buck Jud Gud hous cooperation documenting April 1978 83 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 83, 84
Winner Best Scale IN RESEARCHING usually finds sometimes endin2 weak data photos i-vie Award hi remark U Stephen J ever project ni ending up fest itself Such Fairchild After cover EAA Sport N jilt either ft call made 60 miles distant ye Tom Leonhai day picture ns As carefu Left Steve Sterling Award won 77 Nats Award made top static points although plane must make official flight qualify Stinson Voyager won same award 1975 Above Separate wing panels preserve uninterrupted line fuselage top Panels easier build finish one-piece wingand simple attachment system fool-proof 8 Model Aviation Vegas enables normally tiown twoiols thought con cerningespecially important scaleri em strong order survivehand other keep em light because once hit its over anyway think can take credence both approaches depend ing particular type project pre fer former because first flight Las Vegas disaster flying along 10-feet altitude An airplane never should have taken off engine barely half throttle stubborn author insisted attempting fly against wishes able John Roth managed baby Fairchild air straight mounting plans n originai ma us servo bati yards no Otto turn mode e minimal nose cowl landing gear fairing plane back air hour completed two su flights highly doubt feasil lighter built construction practicality sacrificing strength prop erly designed model can inherit tremen dous strength simple techniques strength can induced needed no penalty weight model de signed along conventional lines fre quent references perspective sketches should help clarify prob lem areas y iii mble epoxy Cement vertical b*ih iction ment lywood Ut efore rizing yourself types wood cabin ubood -bal twoclear ance noics tor tneass tubing Secondly attachand epoxy two 015 brass plates tue 1/16 ply wood bottom before assembling sides After framing door opening fore stringers landing gear main fair ing 3/16 dowel compression strut can April1978 9 Rudder elevator s tion arrangement rudder moved bin floor accessible thro htn shows belicrank di Nyrod foreground plans show mo# red Nyrod pu igement resists Seen through di w&ng spars rele Good engineering thing Check give builder 10 Model ip servos mounted ca irn plan top view wing An ervos allow bottom hatch st balsa stwck struts 1 h 1 La ritA ce 5 four ovei e lf NOSE COWLI/B BALSADP2 PLANRINAC.PlOELEVATOR ABP12SOFTBALSACOSTS HORN CARVEFROM71 TAiLWSEER~ /1 15I SPRUCEIIPAIRING BATT ROT 44-B-SCABSRVOOESS ~eOcSA AVSSET 121z[S 005CC 1 IFI SAUNA SLOCEF. SCAR ROT FlMAPLE BLOCES I/IS PLTWTOO UF VEAR STRAPS TO MAPLE BLOCOS I/O ROLSR-l//1/ V S/S SAL S RP'BA LS V R-A- S IDES SVSA BALSA S/IS PLTRAVOBOTTOM fF98 P7U 5000CR CONTROL CARLES 2 SCOT F8 U F IIIi -T/TZ BALSA S TESU plo P9 __ I/S SOUSA PLANKING PASELASE CONNTRACTIONCABIN SIRES REPOSE FOSUESS STRINGERS LORINATE I/VT PLYWOCO LVBINATEOCARVEFROSA- / 00 ACETATE/ OTT ABS SALOOq~ Ii 0 0/ISI rr--SPRACESIFB1IP915F10Tfii /SWITOSIIu 50lJ- ELEVATOR OPSOCEIIRAOOES CARIN SITEU II/TO PLTSCSTOT- II IS FR0/TA SALGAP55 I TO GIS BRATS EPOR/ PATTT FIRESOLASS WHEEL PANTS BAR/C FOAT VALVES FAIRCHILD RANGER 24 OESIGBEO SNO OSRWN BRPLATE o.I/ATM SCALE -a M 0 5 -I 0 75i $ j cg1 FORM HIG ATASS US SHOWN TO ALIOE OVER OGO U ASSEMBLE SPRING I116 BALSA II CH TO P16 BHO-~ LIEW*O RTOHITr~IX SA WAW4j7ThWI BALSA WAW6WAW5 W4WW44W3iiW2 WAAIiz- p I IIIOHlrlTGGHHlFT B = I W NG TIPS ZTHTO BALSA TOTEr1116 BALSA SHEET fIII L GOLUCH 4 RLOCEN\ SCREW EPOGY TO SCREW 4 EPOHYP15 PLOWOOG RUPLE RLHCES TO i HAN PLORUOGTHT SO BALSA URRIT FROM AD TO WILEAPING EGUESSPRUCE WINA SPARS ___ ____ ____ Tz -— III IIIII 0II II-____ U — 0 ____—= ._____ ____ ______________IEHB -W4 W211W3G~PW4HTW4W4W4W5 IHB IHW6ANNANAW6W6 II_____TPLH.HIS OIA61 _______ MRAN\7 — 4AI1~ __ II~JI - I--_ PLAP SHIN RALSAFLAPRINSE TAPERES AS STOWSP15FORMICA LELEO BORN N1- IIWS II II II IITAPER EPHET TO TA SHEETTOTTAM SHEET FLATTENSOLSER RRUHS ORILL TAP FOR SILOER SHLGER W RB NWA BR TOT I-TO MNXXk/LI SWOO RRNRROE MNW-7HIS SHEET BALSA HH PA SO SPRUCETHIS TOWEL RING 4 SOLGERFIRERALAGS SOLUER OIT BRASSBRASS TARN EHOATOOPLTWHHO 4 UHIT THUGSSGLOCR 0I05AST FAIRCHILDRANGER 24 DESIHTED ANG ORGWN RTPLUTE IPX TO SCALEA OF 2 FULL-SIZE PLANS AVAILABLESEE PAGE 104 pHI WI WI 0 o WB Although scale m case about stringers gi involves cererug aetalung imary fuselage box visil simulated batter cabin detailing have inspect act Sport Scale pr o separates men hese details since ma nd off 10 feet exu single detail picture showath allo hole two 4-4C mounted tuselage no tI20 epoxied blind nuts 4-40 screv iventional foam d horizont er top tbi rudder Add a complete g made fror od wheel fox soldered 010 Sig eaIs attachir s tubing Notice epoxied Two flex rod c control steerable tail wheel turns rudder Gear A normal L lb load i pilot makes ngs Althot iaster u cra uld r wing tip sport oi 14 lv rr lay flue P keyh hold Dotai o stitchi~ mor ome some pant ar two nv 1/64detrain bent overvel tap Aut rch pailL pox transi th wire sm Ip IL screw anain Covering & FinishingmodellarUt C covered Sig silk except wood surfaces finished K&B resin primed auto-lacquer pri mer After brushing two coats butyrate clear thinned 50% silk surfaces pinking tape applied thinned white glue Rib stitching simulated applying beads Titebond tooth pick numerous methods simulating pinking tape problem pre-doped Silkspan tissue sharp Saran Wrap serrated edge still end up frayed edges found tracing vellum gives best definition does require pre-doping although little effort required adhere doped surface hence thinned white glue Spray additional two three coats clear over silk surfaces two coasts gray butyrate will make silk surfaces compatible tone wood surfaces finished gray lacquer primer succeeding coats yellow has poor covering qualities anyway will result match preparing wood surfaces polyester resin remember quality finished product will good shaping sanding done balsa wood may have flow resin sections cowl because its shape since tends run over sides Finish 400 wet-or-dry spray few coats gray auto-lacquer primer Sand completely off 300-400 wet-or-dry will notice primer begins fill low spots prefer sand dry since easier tell part paper used part clean use handy damp sponge wipe off dust resi due Final sanding should done 500-600 wet-or-dry paper attempt spray component time such fuselage stab rudder etc Otherwise will end up im proper coverage overspray runs etc Since fuselage tail dif ficult some sort fixture must made accommodate surfaces horizontal spray gun Visualize framework scrap furring strips built support rotate model such would barbecue spit now possible keep surfaces horizontal painting time rotate fuselage completely around ready apply second coat No two coats butyrate 24hour period Vinyl contact paper makes good masking stencil spraying numerals rudder Black pin striping accom either thin stick-on vinyl tape method want something permanent use #3 Rapidograph India ink designed use mylar film Spray dust coat two clear seal ink Cut template flat 030-040 ace tate windshield Cement place 16 Model Aviation landing gear again wing Struts SlIp cuff fastened posi tion Allen screws blind nuts Lower part telescoping main strut brass tubing Wilbold RC-56 white glue Make garnish trim molding 030 ABS flat stock paint before applying wind shield RC-56 glue Apply door window inside cut 3/16-thin rear window molding apply over rear window outside Door handles made either brass aluminum may made function can fixed case hook should epoxied inside door rubberband holding doors tight against fuselage exhaust stacks simulated eter Plastruct covered bright foil painted Flying Originally K&B 61 stalled beam mounts proximity exhaust stack inside cowl necessitated aluminum header right angles order route exhaust gases rearward No room expansion chamber created kinds over heating problems besides being able keep engine running final ap proach first four test flights ended up dead-stick landings suspected small cowl opening contributing factor overheated en gine later learn significant two culprits aluminum manifold created much back pressure exhaust gases no place go Additional room provided some sort expansion cham ber muffler Secondly air entering small opening became turbulent effectively cooling cylinder fins way through out bottom open ing maple beam mounts sawed off flush firewall using Kraft radial mount engine rotated front view far over possible po sition put cylinder behind cowl opening allowed design I-in diameter expansion tube muffler Fabri cate tin stock silver solder solve second problem required ex pertise some engine experts namely Big Al Adamisin Ron Plotske conclusion size cowl opening problem since exit opening certainly sufficient Air turbulent around cylinder passing through fins re quired since inside cowl got larger went rearward air tended favor inside shape Some sort baffle needed Borrowing earlier days speed simple alu minum baffle strapped around cyl inder forcing intake air go through fins out backside next practice session enjoyable first opportunity taxi back another takeoff K&B finally idl ing running properly model flew right off drawing board smooth ap plication power brings ship right up its main gear down elevator Normal flying done just over Continued page 83 April 1978 17 Lower portion rudder showing scale permanent trim tab Other points interest tail wheel fork fin fillet portion elevator fiiqht trim tab simulated rivets upper portion ruddenumeeis ou ted black No 3 Fa1 era lighting make hinge line visible out ordinary light baremy discernible Letters Editor continued page 58 course RC model can sorts aerobatics real aircrafi can do.. Size am writing say thanks excellent article About Size Bradford Powers appeared 1/78 edition magazine Mr Powers presented material clear interesting manner yet supplied enough background equations logic make article value practical application Please let us see articles author others subject model aerody namics David U Zwolak Cincinnati OH Dream Site am 30 members Cen tour Radio Club East Liverpool Ohio club has picked up about 8 new members last 6 months May no field fly wrote head Parks Ohio asked permission RC club use part vast 22000 acres Ohio Beaver Creek State Park Old mills ground flour water over 100 years ago rolling hills etc park manager former Navy carrier pilot escorted us about 5 miles gave us nice field about 25 acres fly put log chains across entrance told us keep locked up avoid pot parties trouble before got members keys pad lock have nice place fly 1 mile nearest house Edwin H Orr East Liverpool OH Well Ill what its worth may offer following Two years ago test flying Wakefield al tube no file put up down R/L thrust did have rudder tab Because aircraft power stalling thought well put some right tab rudder Wind came up same next Sunday Following Sunday full power flights some ground After considerable thought about titude model powering up through air realized Am flying RR rudder tab set right As aircraft rolled right vertical tail slowly became stab What does aircraft down elevatordive comments Ive recd very good modelers Well Ill Don Eggersperger Redondo Beach CA Fairchild Ranger/Sauger continued page 17 half throttle full flaps slow fly-by about ttle about 10-mph headwind close scale fly ing speed possible Full flaps recom mended landings except strong winds means power landing As indicated earlier model will stay ground through rollout very little down trim Time dismantle Remove eight 4-40 screws Reach inside cabin unhook servo quick-release pushrods Squeeze two finger tabs slide out wing time Total time about three minutes little effort con struction youll apppreciate aes thetic value clean fuselage have simpler task storing certainly wish everyone success building flying Fairchild especially may consider graduating Sport Scale AMA appreciation owners N77661 Tom Leonhardt Dick Buck Jud Gud hous cooperation documenting April 1978 83 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 83, 84
Winner Best Scale IN RESEARCHING usually finds sometimes endin2 weak data photos i-vie Award hi remark U Stephen J ever project ni ending up fest itself Such Fairchild After cover EAA Sport N jilt either ft call made 60 miles distant ye Tom Leonhai day picture ns As carefu Left Steve Sterling Award won 77 Nats Award made top static points although plane must make official flight qualify Stinson Voyager won same award 1975 Above Separate wing panels preserve uninterrupted line fuselage top Panels easier build finish one-piece wingand simple attachment system fool-proof 8 Model Aviation Vegas enables normally tiown twoiols thought con cerningespecially important scaleri em strong order survivehand other keep em light because once hit its over anyway think can take credence both approaches depend ing particular type project pre fer former because first flight Las Vegas disaster flying along 10-feet altitude An airplane never should have taken off engine barely half throttle stubborn author insisted attempting fly against wishes able John Roth managed baby Fairchild air straight mounting plans n originai ma us servo bati yards no Otto turn mode e minimal nose cowl landing gear fairing plane back air hour completed two su flights highly doubt feasil lighter built construction practicality sacrificing strength prop erly designed model can inherit tremen dous strength simple techniques strength can induced needed no penalty weight model de signed along conventional lines fre quent references perspective sketches should help clarify prob lem areas y iii mble epoxy Cement vertical b*ih iction ment lywood Ut efore rizing yourself types wood cabin ubood -bal twoclear ance noics tor tneass tubing Secondly attachand epoxy two 015 brass plates tue 1/16 ply wood bottom before assembling sides After framing door opening fore stringers landing gear main fair ing 3/16 dowel compression strut can April1978 9 Rudder elevator s tion arrangement rudder moved bin floor accessible thro htn shows belicrank di Nyrod foreground plans show mo# red Nyrod pu igement resists Seen through di w&ng spars rele Good engineering thing Check give builder 10 Model ip servos mounted ca irn plan top view wing An ervos allow bottom hatch st balsa stwck struts 1 h 1 La ritA ce 5 four ovei e lf NOSE COWLI/B BALSADP2 PLANRINAC.PlOELEVATOR ABP12SOFTBALSACOSTS HORN CARVEFROM71 TAiLWSEER~ /1 15I SPRUCEIIPAIRING BATT ROT 44-B-SCABSRVOOESS ~eOcSA AVSSET 121z[S 005CC 1 IFI SAUNA SLOCEF. SCAR ROT FlMAPLE BLOCES I/IS PLTWTOO UF VEAR STRAPS TO MAPLE BLOCOS I/O ROLSR-l//1/ V S/S SAL S RP'BA LS V R-A- S IDES SVSA BALSA S/IS PLTRAVOBOTTOM fF98 P7U 5000CR CONTROL CARLES 2 SCOT F8 U F IIIi -T/TZ BALSA S TESU plo P9 __ I/S SOUSA PLANKING PASELASE CONNTRACTIONCABIN SIRES REPOSE FOSUESS STRINGERS LORINATE I/VT PLYWOCO LVBINATEOCARVEFROSA- / 00 ACETATE/ OTT ABS SALOOq~ Ii 0 0/ISI rr--SPRACESIFB1IP915F10Tfii /SWITOSIIu 50lJ- ELEVATOR OPSOCEIIRAOOES CARIN SITEU II/TO PLTSCSTOT- II IS FR0/TA SALGAP55 I TO GIS BRATS EPOR/ PATTT FIRESOLASS WHEEL PANTS BAR/C FOAT VALVES FAIRCHILD RANGER 24 OESIGBEO SNO OSRWN BRPLATE o.I/ATM SCALE -a M 0 5 -I 0 75i $ j cg1 FORM HIG ATASS US SHOWN TO ALIOE OVER OGO U ASSEMBLE SPRING I116 BALSA II CH TO P16 BHO-~ LIEW*O RTOHITr~IX SA WAW4j7ThWI BALSA WAW6WAW5 W4WW44W3iiW2 WAAIiz- p I IIIOHlrlTGGHHlFT B = I W NG TIPS ZTHTO BALSA TOTEr1116 BALSA SHEET fIII L GOLUCH 4 RLOCEN\ SCREW EPOGY TO SCREW 4 EPOHYP15 PLOWOOG RUPLE RLHCES TO i HAN PLORUOGTHT SO BALSA URRIT FROM AD TO WILEAPING EGUESSPRUCE WINA SPARS ___ ____ ____ Tz -— III IIIII 0II II-____ U — 0 ____—= ._____ ____ ______________IEHB -W4 W211W3G~PW4HTW4W4W4W5 IHB IHW6ANNANAW6W6 II_____TPLH.HIS OIA61 _______ MRAN\7 — 4AI1~ __ II~JI - I--_ PLAP SHIN RALSAFLAPRINSE TAPERES AS STOWSP15FORMICA LELEO BORN N1- IIWS II II II IITAPER EPHET TO TA SHEETTOTTAM SHEET FLATTENSOLSER RRUHS ORILL TAP FOR SILOER SHLGER W RB NWA BR TOT I-TO MNXXk/LI SWOO RRNRROE MNW-7HIS SHEET BALSA HH PA SO SPRUCETHIS TOWEL RING 4 SOLGERFIRERALAGS SOLUER OIT BRASSBRASS TARN EHOATOOPLTWHHO 4 UHIT THUGSSGLOCR 0I05AST FAIRCHILDRANGER 24 DESIHTED ANG ORGWN RTPLUTE IPX TO SCALEA OF 2 FULL-SIZE PLANS AVAILABLESEE PAGE 104 pHI WI WI 0 o WB Although scale m case about stringers gi involves cererug aetalung imary fuselage box visil simulated batter cabin detailing have inspect act Sport Scale pr o separates men hese details since ma nd off 10 feet exu single detail picture showath allo hole two 4-4C mounted tuselage no tI20 epoxied blind nuts 4-40 screv iventional foam d horizont er top tbi rudder Add a complete g made fror od wheel fox soldered 010 Sig eaIs attachir s tubing Notice epoxied Two flex rod c control steerable tail wheel turns rudder Gear A normal L lb load i pilot makes ngs Althot iaster u cra uld r wing tip sport oi 14 lv rr lay flue P keyh hold Dotai o stitchi~ mor ome some pant ar two nv 1/64detrain bent overvel tap Aut rch pailL pox transi th wire sm Ip IL screw anain Covering & FinishingmodellarUt C covered Sig silk except wood surfaces finished K&B resin primed auto-lacquer pri mer After brushing two coats butyrate clear thinned 50% silk surfaces pinking tape applied thinned white glue Rib stitching simulated applying beads Titebond tooth pick numerous methods simulating pinking tape problem pre-doped Silkspan tissue sharp Saran Wrap serrated edge still end up frayed edges found tracing vellum gives best definition does require pre-doping although little effort required adhere doped surface hence thinned white glue Spray additional two three coats clear over silk surfaces two coasts gray butyrate will make silk surfaces compatible tone wood surfaces finished gray lacquer primer succeeding coats yellow has poor covering qualities anyway will result match preparing wood surfaces polyester resin remember quality finished product will good shaping sanding done balsa wood may have flow resin sections cowl because its shape since tends run over sides Finish 400 wet-or-dry spray few coats gray auto-lacquer primer Sand completely off 300-400 wet-or-dry will notice primer begins fill low spots prefer sand dry since easier tell part paper used part clean use handy damp sponge wipe off dust resi due Final sanding should done 500-600 wet-or-dry paper attempt spray component time such fuselage stab rudder etc Otherwise will end up im proper coverage overspray runs etc Since fuselage tail dif ficult some sort fixture must made accommodate surfaces horizontal spray gun Visualize framework scrap furring strips built support rotate model such would barbecue spit now possible keep surfaces horizontal painting time rotate fuselage completely around ready apply second coat No two coats butyrate 24hour period Vinyl contact paper makes good masking stencil spraying numerals rudder Black pin striping accom either thin stick-on vinyl tape method want something permanent use #3 Rapidograph India ink designed use mylar film Spray dust coat two clear seal ink Cut template flat 030-040 ace tate windshield Cement place 16 Model Aviation landing gear again wing Struts SlIp cuff fastened posi tion Allen screws blind nuts Lower part telescoping main strut brass tubing Wilbold RC-56 white glue Make garnish trim molding 030 ABS flat stock paint before applying wind shield RC-56 glue Apply door window inside cut 3/16-thin rear window molding apply over rear window outside Door handles made either brass aluminum may made function can fixed case hook should epoxied inside door rubberband holding doors tight against fuselage exhaust stacks simulated eter Plastruct covered bright foil painted Flying Originally K&B 61 stalled beam mounts proximity exhaust stack inside cowl necessitated aluminum header right angles order route exhaust gases rearward No room expansion chamber created kinds over heating problems besides being able keep engine running final ap proach first four test flights ended up dead-stick landings suspected small cowl opening contributing factor overheated en gine later learn significant two culprits aluminum manifold created much back pressure exhaust gases no place go Additional room provided some sort expansion cham ber muffler Secondly air entering small opening became turbulent effectively cooling cylinder fins way through out bottom open ing maple beam mounts sawed off flush firewall using Kraft radial mount engine rotated front view far over possible po sition put cylinder behind cowl opening allowed design I-in diameter expansion tube muffler Fabri cate tin stock silver solder solve second problem required ex pertise some engine experts namely Big Al Adamisin Ron Plotske conclusion size cowl opening problem since exit opening certainly sufficient Air turbulent around cylinder passing through fins re quired since inside cowl got larger went rearward air tended favor inside shape Some sort baffle needed Borrowing earlier days speed simple alu minum baffle strapped around cyl inder forcing intake air go through fins out backside next practice session enjoyable first opportunity taxi back another takeoff K&B finally idl ing running properly model flew right off drawing board smooth ap plication power brings ship right up its main gear down elevator Normal flying done just over Continued page 83 April 1978 17 Lower portion rudder showing scale permanent trim tab Other points interest tail wheel fork fin fillet portion elevator fiiqht trim tab simulated rivets upper portion ruddenumeeis ou ted black No 3 Fa1 era lighting make hinge line visible out ordinary light baremy discernible Letters Editor continued page 58 course RC model can sorts aerobatics real aircrafi can do.. Size am writing say thanks excellent article About Size Bradford Powers appeared 1/78 edition magazine Mr Powers presented material clear interesting manner yet supplied enough background equations logic make article value practical application Please let us see articles author others subject model aerody namics David U Zwolak Cincinnati OH Dream Site am 30 members Cen tour Radio Club East Liverpool Ohio club has picked up about 8 new members last 6 months May no field fly wrote head Parks Ohio asked permission RC club use part vast 22000 acres Ohio Beaver Creek State Park Old mills ground flour water over 100 years ago rolling hills etc park manager former Navy carrier pilot escorted us about 5 miles gave us nice field about 25 acres fly put log chains across entrance told us keep locked up avoid pot parties trouble before got members keys pad lock have nice place fly 1 mile nearest house Edwin H Orr East Liverpool OH Well Ill what its worth may offer following Two years ago test flying Wakefield al tube no file put up down R/L thrust did have rudder tab Because aircraft power stalling thought well put some right tab rudder Wind came up same next Sunday Following Sunday full power flights some ground After considerable thought about titude model powering up through air realized Am flying RR rudder tab set right As aircraft rolled right vertical tail slowly became stab What does aircraft down elevatordive comments Ive recd very good modelers Well Ill Don Eggersperger Redondo Beach CA Fairchild Ranger/Sauger continued page 17 half throttle full flaps slow fly-by about ttle about 10-mph headwind close scale fly ing speed possible Full flaps recom mended landings except strong winds means power landing As indicated earlier model will stay ground through rollout very little down trim Time dismantle Remove eight 4-40 screws Reach inside cabin unhook servo quick-release pushrods Squeeze two finger tabs slide out wing time Total time about three minutes little effort con struction youll apppreciate aes thetic value clean fuselage have simpler task storing certainly wish everyone success building flying Fairchild especially may consider graduating Sport Scale AMA appreciation owners N77661 Tom Leonhardt Dick Buck Jud Gud hous cooperation documenting April 1978 83 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 83, 84
Winner Best Scale IN RESEARCHING usually finds sometimes endin2 weak data photos i-vie Award hi remark U Stephen J ever project ni ending up fest itself Such Fairchild After cover EAA Sport N jilt either ft call made 60 miles distant ye Tom Leonhai day picture ns As carefu Left Steve Sterling Award won 77 Nats Award made top static points although plane must make official flight qualify Stinson Voyager won same award 1975 Above Separate wing panels preserve uninterrupted line fuselage top Panels easier build finish one-piece wingand simple attachment system fool-proof 8 Model Aviation Vegas enables normally tiown twoiols thought con cerningespecially important scaleri em strong order survivehand other keep em light because once hit its over anyway think can take credence both approaches depend ing particular type project pre fer former because first flight Las Vegas disaster flying along 10-feet altitude An airplane never should have taken off engine barely half throttle stubborn author insisted attempting fly against wishes able John Roth managed baby Fairchild air straight mounting plans n originai ma us servo bati yards no Otto turn mode e minimal nose cowl landing gear fairing plane back air hour completed two su flights highly doubt feasil lighter built construction practicality sacrificing strength prop erly designed model can inherit tremen dous strength simple techniques strength can induced needed no penalty weight model de signed along conventional lines fre quent references perspective sketches should help clarify prob lem areas y iii mble epoxy Cement vertical b*ih iction ment lywood Ut efore rizing yourself types wood cabin ubood -bal twoclear ance noics tor tneass tubing Secondly attachand epoxy two 015 brass plates tue 1/16 ply wood bottom before assembling sides After framing door opening fore stringers landing gear main fair ing 3/16 dowel compression strut can April1978 9 Rudder elevator s tion arrangement rudder moved bin floor accessible thro htn shows belicrank di Nyrod foreground plans show mo# red Nyrod pu igement resists Seen through di w&ng spars rele Good engineering thing Check give builder 10 Model ip servos mounted ca irn plan top view wing An ervos allow bottom hatch st balsa stwck struts 1 h 1 La ritA ce 5 four ovei e lf NOSE COWLI/B BALSADP2 PLANRINAC.PlOELEVATOR ABP12SOFTBALSACOSTS HORN CARVEFROM71 TAiLWSEER~ /1 15I SPRUCEIIPAIRING BATT ROT 44-B-SCABSRVOOESS ~eOcSA AVSSET 121z[S 005CC 1 IFI SAUNA SLOCEF. SCAR ROT FlMAPLE BLOCES I/IS PLTWTOO UF VEAR STRAPS TO MAPLE BLOCOS I/O ROLSR-l//1/ V S/S SAL S RP'BA LS V R-A- S IDES SVSA BALSA S/IS PLTRAVOBOTTOM fF98 P7U 5000CR CONTROL CARLES 2 SCOT F8 U F IIIi -T/TZ BALSA S TESU plo P9 __ I/S SOUSA PLANKING PASELASE CONNTRACTIONCABIN SIRES REPOSE FOSUESS STRINGERS LORINATE I/VT PLYWOCO LVBINATEOCARVEFROSA- / 00 ACETATE/ OTT ABS SALOOq~ Ii 0 0/ISI rr--SPRACESIFB1IP915F10Tfii /SWITOSIIu 50lJ- ELEVATOR OPSOCEIIRAOOES CARIN SITEU II/TO PLTSCSTOT- II IS FR0/TA SALGAP55 I TO GIS BRATS EPOR/ PATTT FIRESOLASS WHEEL PANTS BAR/C FOAT VALVES FAIRCHILD RANGER 24 OESIGBEO SNO OSRWN BRPLATE o.I/ATM SCALE -a M 0 5 -I 0 75i $ j cg1 FORM HIG ATASS US SHOWN TO ALIOE OVER OGO U ASSEMBLE SPRING I116 BALSA II CH TO P16 BHO-~ LIEW*O RTOHITr~IX SA WAW4j7ThWI BALSA WAW6WAW5 W4WW44W3iiW2 WAAIiz- p I IIIOHlrlTGGHHlFT B = I W NG TIPS ZTHTO BALSA TOTEr1116 BALSA SHEET fIII L GOLUCH 4 RLOCEN\ SCREW EPOGY TO SCREW 4 EPOHYP15 PLOWOOG RUPLE RLHCES TO i HAN PLORUOGTHT SO BALSA URRIT FROM AD TO WILEAPING EGUESSPRUCE WINA SPARS ___ ____ ____ Tz -— III IIIII 0II II-____ U — 0 ____—= ._____ ____ ______________IEHB -W4 W211W3G~PW4HTW4W4W4W5 IHB IHW6ANNANAW6W6 II_____TPLH.HIS OIA61 _______ MRAN\7 — 4AI1~ __ II~JI - I--_ PLAP SHIN RALSAFLAPRINSE TAPERES AS STOWSP15FORMICA LELEO BORN N1- IIWS II II II IITAPER EPHET TO TA SHEETTOTTAM SHEET FLATTENSOLSER RRUHS ORILL TAP FOR SILOER SHLGER W RB NWA BR TOT I-TO MNXXk/LI SWOO RRNRROE MNW-7HIS SHEET BALSA HH PA SO SPRUCETHIS TOWEL RING 4 SOLGERFIRERALAGS SOLUER OIT BRASSBRASS TARN EHOATOOPLTWHHO 4 UHIT THUGSSGLOCR 0I05AST FAIRCHILDRANGER 24 DESIHTED ANG ORGWN RTPLUTE IPX TO SCALEA OF 2 FULL-SIZE PLANS AVAILABLESEE PAGE 104 pHI WI WI 0 o WB Although scale m case about stringers gi involves cererug aetalung imary fuselage box visil simulated batter cabin detailing have inspect act Sport Scale pr o separates men hese details since ma nd off 10 feet exu single detail picture showath allo hole two 4-4C mounted tuselage no tI20 epoxied blind nuts 4-40 screv iventional foam d horizont er top tbi rudder Add a complete g made fror od wheel fox soldered 010 Sig eaIs attachir s tubing Notice epoxied Two flex rod c control steerable tail wheel turns rudder Gear A normal L lb load i pilot makes ngs Althot iaster u cra uld r wing tip sport oi 14 lv rr lay flue P keyh hold Dotai o stitchi~ mor ome some pant ar two nv 1/64detrain bent overvel tap Aut rch pailL pox transi th wire sm Ip IL screw anain Covering & FinishingmodellarUt C covered Sig silk except wood surfaces finished K&B resin primed auto-lacquer pri mer After brushing two coats butyrate clear thinned 50% silk surfaces pinking tape applied thinned white glue Rib stitching simulated applying beads Titebond tooth pick numerous methods simulating pinking tape problem pre-doped Silkspan tissue sharp Saran Wrap serrated edge still end up frayed edges found tracing vellum gives best definition does require pre-doping although little effort required adhere doped surface hence thinned white glue Spray additional two three coats clear over silk surfaces two coasts gray butyrate will make silk surfaces compatible tone wood surfaces finished gray lacquer primer succeeding coats yellow has poor covering qualities anyway will result match preparing wood surfaces polyester resin remember quality finished product will good shaping sanding done balsa wood may have flow resin sections cowl because its shape since tends run over sides Finish 400 wet-or-dry spray few coats gray auto-lacquer primer Sand completely off 300-400 wet-or-dry will notice primer begins fill low spots prefer sand dry since easier tell part paper used part clean use handy damp sponge wipe off dust resi due Final sanding should done 500-600 wet-or-dry paper attempt spray component time such fuselage stab rudder etc Otherwise will end up im proper coverage overspray runs etc Since fuselage tail dif ficult some sort fixture must made accommodate surfaces horizontal spray gun Visualize framework scrap furring strips built support rotate model such would barbecue spit now possible keep surfaces horizontal painting time rotate fuselage completely around ready apply second coat No two coats butyrate 24hour period Vinyl contact paper makes good masking stencil spraying numerals rudder Black pin striping accom either thin stick-on vinyl tape method want something permanent use #3 Rapidograph India ink designed use mylar film Spray dust coat two clear seal ink Cut template flat 030-040 ace tate windshield Cement place 16 Model Aviation landing gear again wing Struts SlIp cuff fastened posi tion Allen screws blind nuts Lower part telescoping main strut brass tubing Wilbold RC-56 white glue Make garnish trim molding 030 ABS flat stock paint before applying wind shield RC-56 glue Apply door window inside cut 3/16-thin rear window molding apply over rear window outside Door handles made either brass aluminum may made function can fixed case hook should epoxied inside door rubberband holding doors tight against fuselage exhaust stacks simulated eter Plastruct covered bright foil painted Flying Originally K&B 61 stalled beam mounts proximity exhaust stack inside cowl necessitated aluminum header right angles order route exhaust gases rearward No room expansion chamber created kinds over heating problems besides being able keep engine running final ap proach first four test flights ended up dead-stick landings suspected small cowl opening contributing factor overheated en gine later learn significant two culprits aluminum manifold created much back pressure exhaust gases no place go Additional room provided some sort expansion cham ber muffler Secondly air entering small opening became turbulent effectively cooling cylinder fins way through out bottom open ing maple beam mounts sawed off flush firewall using Kraft radial mount engine rotated front view far over possible po sition put cylinder behind cowl opening allowed design I-in diameter expansion tube muffler Fabri cate tin stock silver solder solve second problem required ex pertise some engine experts namely Big Al Adamisin Ron Plotske conclusion size cowl opening problem since exit opening certainly sufficient Air turbulent around cylinder passing through fins re quired since inside cowl got larger went rearward air tended favor inside shape Some sort baffle needed Borrowing earlier days speed simple alu minum baffle strapped around cyl inder forcing intake air go through fins out backside next practice session enjoyable first opportunity taxi back another takeoff K&B finally idl ing running properly model flew right off drawing board smooth ap plication power brings ship right up its main gear down elevator Normal flying done just over Continued page 83 April 1978 17 Lower portion rudder showing scale permanent trim tab Other points interest tail wheel fork fin fillet portion elevator fiiqht trim tab simulated rivets upper portion ruddenumeeis ou ted black No 3 Fa1 era lighting make hinge line visible out ordinary light baremy discernible Letters Editor continued page 58 course RC model can sorts aerobatics real aircrafi can do.. Size am writing say thanks excellent article About Size Bradford Powers appeared 1/78 edition magazine Mr Powers presented material clear interesting manner yet supplied enough background equations logic make article value practical application Please let us see articles author others subject model aerody namics David U Zwolak Cincinnati OH Dream Site am 30 members Cen tour Radio Club East Liverpool Ohio club has picked up about 8 new members last 6 months May no field fly wrote head Parks Ohio asked permission RC club use part vast 22000 acres Ohio Beaver Creek State Park Old mills ground flour water over 100 years ago rolling hills etc park manager former Navy carrier pilot escorted us about 5 miles gave us nice field about 25 acres fly put log chains across entrance told us keep locked up avoid pot parties trouble before got members keys pad lock have nice place fly 1 mile nearest house Edwin H Orr East Liverpool OH Well Ill what its worth may offer following Two years ago test flying Wakefield al tube no file put up down R/L thrust did have rudder tab Because aircraft power stalling thought well put some right tab rudder Wind came up same next Sunday Following Sunday full power flights some ground After considerable thought about titude model powering up through air realized Am flying RR rudder tab set right As aircraft rolled right vertical tail slowly became stab What does aircraft down elevatordive comments Ive recd very good modelers Well Ill Don Eggersperger Redondo Beach CA Fairchild Ranger/Sauger continued page 17 half throttle full flaps slow fly-by about ttle about 10-mph headwind close scale fly ing speed possible Full flaps recom mended landings except strong winds means power landing As indicated earlier model will stay ground through rollout very little down trim Time dismantle Remove eight 4-40 screws Reach inside cabin unhook servo quick-release pushrods Squeeze two finger tabs slide out wing time Total time about three minutes little effort con struction youll apppreciate aes thetic value clean fuselage have simpler task storing certainly wish everyone success building flying Fairchild especially may consider graduating Sport Scale AMA appreciation owners N77661 Tom Leonhardt Dick Buck Jud Gud hous cooperation documenting April 1978 83 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 83, 84
Winner Best Scale IN RESEARCHING usually finds sometimes endin2 weak data photos i-vie Award hi remark U Stephen J ever project ni ending up fest itself Such Fairchild After cover EAA Sport N jilt either ft call made 60 miles distant ye Tom Leonhai day picture ns As carefu Left Steve Sterling Award won 77 Nats Award made top static points although plane must make official flight qualify Stinson Voyager won same award 1975 Above Separate wing panels preserve uninterrupted line fuselage top Panels easier build finish one-piece wingand simple attachment system fool-proof 8 Model Aviation Vegas enables normally tiown twoiols thought con cerningespecially important scaleri em strong order survivehand other keep em light because once hit its over anyway think can take credence both approaches depend ing particular type project pre fer former because first flight Las Vegas disaster flying along 10-feet altitude An airplane never should have taken off engine barely half throttle stubborn author insisted attempting fly against wishes able John Roth managed baby Fairchild air straight mounting plans n originai ma us servo bati yards no Otto turn mode e minimal nose cowl landing gear fairing plane back air hour completed two su flights highly doubt feasil lighter built construction practicality sacrificing strength prop erly designed model can inherit tremen dous strength simple techniques strength can induced needed no penalty weight model de signed along conventional lines fre quent references perspective sketches should help clarify prob lem areas y iii mble epoxy Cement vertical b*ih iction ment lywood Ut efore rizing yourself types wood cabin ubood -bal twoclear ance noics tor tneass tubing Secondly attachand epoxy two 015 brass plates tue 1/16 ply wood bottom before assembling sides After framing door opening fore stringers landing gear main fair ing 3/16 dowel compression strut can April1978 9 Rudder elevator s tion arrangement rudder moved bin floor accessible thro htn shows belicrank di Nyrod foreground plans show mo# red Nyrod pu igement resists Seen through di w&ng spars rele Good engineering thing Check give builder 10 Model ip servos mounted ca irn plan top view wing An ervos allow bottom hatch st balsa stwck struts 1 h 1 La ritA ce 5 four ovei e lf NOSE COWLI/B BALSADP2 PLANRINAC.PlOELEVATOR ABP12SOFTBALSACOSTS HORN CARVEFROM71 TAiLWSEER~ /1 15I SPRUCEIIPAIRING BATT ROT 44-B-SCABSRVOOESS ~eOcSA AVSSET 121z[S 005CC 1 IFI SAUNA SLOCEF. SCAR ROT FlMAPLE BLOCES I/IS PLTWTOO UF VEAR STRAPS TO MAPLE BLOCOS I/O ROLSR-l//1/ V S/S SAL S RP'BA LS V R-A- S IDES SVSA BALSA S/IS PLTRAVOBOTTOM fF98 P7U 5000CR CONTROL CARLES 2 SCOT F8 U F IIIi -T/TZ BALSA S TESU plo P9 __ I/S SOUSA PLANKING PASELASE CONNTRACTIONCABIN SIRES REPOSE FOSUESS STRINGERS LORINATE I/VT PLYWOCO LVBINATEOCARVEFROSA- / 00 ACETATE/ OTT ABS SALOOq~ Ii 0 0/ISI rr--SPRACESIFB1IP915F10Tfii /SWITOSIIu 50lJ- ELEVATOR OPSOCEIIRAOOES CARIN SITEU II/TO PLTSCSTOT- II IS FR0/TA SALGAP55 I TO GIS BRATS EPOR/ PATTT FIRESOLASS WHEEL PANTS BAR/C FOAT VALVES FAIRCHILD RANGER 24 OESIGBEO SNO OSRWN BRPLATE o.I/ATM SCALE -a M 0 5 -I 0 75i $ j cg1 FORM HIG ATASS US SHOWN TO ALIOE OVER OGO U ASSEMBLE SPRING I116 BALSA II CH TO P16 BHO-~ LIEW*O RTOHITr~IX SA WAW4j7ThWI BALSA WAW6WAW5 W4WW44W3iiW2 WAAIiz- p I IIIOHlrlTGGHHlFT B = I W NG TIPS ZTHTO BALSA TOTEr1116 BALSA SHEET fIII L GOLUCH 4 RLOCEN\ SCREW EPOGY TO SCREW 4 EPOHYP15 PLOWOOG RUPLE RLHCES TO i HAN PLORUOGTHT SO BALSA URRIT FROM AD TO WILEAPING EGUESSPRUCE WINA SPARS ___ ____ ____ Tz -— III IIIII 0II II-____ U — 0 ____—= ._____ ____ ______________IEHB -W4 W211W3G~PW4HTW4W4W4W5 IHB IHW6ANNANAW6W6 II_____TPLH.HIS OIA61 _______ MRAN\7 — 4AI1~ __ II~JI - I--_ PLAP SHIN RALSAFLAPRINSE TAPERES AS STOWSP15FORMICA LELEO BORN N1- IIWS II II II IITAPER EPHET TO TA SHEETTOTTAM SHEET FLATTENSOLSER RRUHS ORILL TAP FOR SILOER SHLGER W RB NWA BR TOT I-TO MNXXk/LI SWOO RRNRROE MNW-7HIS SHEET BALSA HH PA SO SPRUCETHIS TOWEL RING 4 SOLGERFIRERALAGS SOLUER OIT BRASSBRASS TARN EHOATOOPLTWHHO 4 UHIT THUGSSGLOCR 0I05AST FAIRCHILDRANGER 24 DESIHTED ANG ORGWN RTPLUTE IPX TO SCALEA OF 2 FULL-SIZE PLANS AVAILABLESEE PAGE 104 pHI WI WI 0 o WB Although scale m case about stringers gi involves cererug aetalung imary fuselage box visil simulated batter cabin detailing have inspect act Sport Scale pr o separates men hese details since ma nd off 10 feet exu single detail picture showath allo hole two 4-4C mounted tuselage no tI20 epoxied blind nuts 4-40 screv iventional foam d horizont er top tbi rudder Add a complete g made fror od wheel fox soldered 010 Sig eaIs attachir s tubing Notice epoxied Two flex rod c control steerable tail wheel turns rudder Gear A normal L lb load i pilot makes ngs Althot iaster u cra uld r wing tip sport oi 14 lv rr lay flue P keyh hold Dotai o stitchi~ mor ome some pant ar two nv 1/64detrain bent overvel tap Aut rch pailL pox transi th wire sm Ip IL screw anain Covering & FinishingmodellarUt C covered Sig silk except wood surfaces finished K&B resin primed auto-lacquer pri mer After brushing two coats butyrate clear thinned 50% silk surfaces pinking tape applied thinned white glue Rib stitching simulated applying beads Titebond tooth pick numerous methods simulating pinking tape problem pre-doped Silkspan tissue sharp Saran Wrap serrated edge still end up frayed edges found tracing vellum gives best definition does require pre-doping although little effort required adhere doped surface hence thinned white glue Spray additional two three coats clear over silk surfaces two coasts gray butyrate will make silk surfaces compatible tone wood surfaces finished gray lacquer primer succeeding coats yellow has poor covering qualities anyway will result match preparing wood surfaces polyester resin remember quality finished product will good shaping sanding done balsa wood may have flow resin sections cowl because its shape since tends run over sides Finish 400 wet-or-dry spray few coats gray auto-lacquer primer Sand completely off 300-400 wet-or-dry will notice primer begins fill low spots prefer sand dry since easier tell part paper used part clean use handy damp sponge wipe off dust resi due Final sanding should done 500-600 wet-or-dry paper attempt spray component time such fuselage stab rudder etc Otherwise will end up im proper coverage overspray runs etc Since fuselage tail dif ficult some sort fixture must made accommodate surfaces horizontal spray gun Visualize framework scrap furring strips built support rotate model such would barbecue spit now possible keep surfaces horizontal painting time rotate fuselage completely around ready apply second coat No two coats butyrate 24hour period Vinyl contact paper makes good masking stencil spraying numerals rudder Black pin striping accom either thin stick-on vinyl tape method want something permanent use #3 Rapidograph India ink designed use mylar film Spray dust coat two clear seal ink Cut template flat 030-040 ace tate windshield Cement place 16 Model Aviation landing gear again wing Struts SlIp cuff fastened posi tion Allen screws blind nuts Lower part telescoping main strut brass tubing Wilbold RC-56 white glue Make garnish trim molding 030 ABS flat stock paint before applying wind shield RC-56 glue Apply door window inside cut 3/16-thin rear window molding apply over rear window outside Door handles made either brass aluminum may made function can fixed case hook should epoxied inside door rubberband holding doors tight against fuselage exhaust stacks simulated eter Plastruct covered bright foil painted Flying Originally K&B 61 stalled beam mounts proximity exhaust stack inside cowl necessitated aluminum header right angles order route exhaust gases rearward No room expansion chamber created kinds over heating problems besides being able keep engine running final ap proach first four test flights ended up dead-stick landings suspected small cowl opening contributing factor overheated en gine later learn significant two culprits aluminum manifold created much back pressure exhaust gases no place go Additional room provided some sort expansion cham ber muffler Secondly air entering small opening became turbulent effectively cooling cylinder fins way through out bottom open ing maple beam mounts sawed off flush firewall using Kraft radial mount engine rotated front view far over possible po sition put cylinder behind cowl opening allowed design I-in diameter expansion tube muffler Fabri cate tin stock silver solder solve second problem required ex pertise some engine experts namely Big Al Adamisin Ron Plotske conclusion size cowl opening problem since exit opening certainly sufficient Air turbulent around cylinder passing through fins re quired since inside cowl got larger went rearward air tended favor inside shape Some sort baffle needed Borrowing earlier days speed simple alu minum baffle strapped around cyl inder forcing intake air go through fins out backside next practice session enjoyable first opportunity taxi back another takeoff K&B finally idl ing running properly model flew right off drawing board smooth ap plication power brings ship right up its main gear down elevator Normal flying done just over Continued page 83 April 1978 17 Lower portion rudder showing scale permanent trim tab Other points interest tail wheel fork fin fillet portion elevator fiiqht trim tab simulated rivets upper portion ruddenumeeis ou ted black No 3 Fa1 era lighting make hinge line visible out ordinary light baremy discernible Letters Editor continued page 58 course RC model can sorts aerobatics real aircrafi can do.. Size am writing say thanks excellent article About Size Bradford Powers appeared 1/78 edition magazine Mr Powers presented material clear interesting manner yet supplied enough background equations logic make article value practical application Please let us see articles author others subject model aerody namics David U Zwolak Cincinnati OH Dream Site am 30 members Cen tour Radio Club East Liverpool Ohio club has picked up about 8 new members last 6 months May no field fly wrote head Parks Ohio asked permission RC club use part vast 22000 acres Ohio Beaver Creek State Park Old mills ground flour water over 100 years ago rolling hills etc park manager former Navy carrier pilot escorted us about 5 miles gave us nice field about 25 acres fly put log chains across entrance told us keep locked up avoid pot parties trouble before got members keys pad lock have nice place fly 1 mile nearest house Edwin H Orr East Liverpool OH Well Ill what its worth may offer following Two years ago test flying Wakefield al tube no file put up down R/L thrust did have rudder tab Because aircraft power stalling thought well put some right tab rudder Wind came up same next Sunday Following Sunday full power flights some ground After considerable thought about titude model powering up through air realized Am flying RR rudder tab set right As aircraft rolled right vertical tail slowly became stab What does aircraft down elevatordive comments Ive recd very good modelers Well Ill Don Eggersperger Redondo Beach CA Fairchild Ranger/Sauger continued page 17 half throttle full flaps slow fly-by about ttle about 10-mph headwind close scale fly ing speed possible Full flaps recom mended landings except strong winds means power landing As indicated earlier model will stay ground through rollout very little down trim Time dismantle Remove eight 4-40 screws Reach inside cabin unhook servo quick-release pushrods Squeeze two finger tabs slide out wing time Total time about three minutes little effort con struction youll apppreciate aes thetic value clean fuselage have simpler task storing certainly wish everyone success building flying Fairchild especially may consider graduating Sport Scale AMA appreciation owners N77661 Tom Leonhardt Dick Buck Jud Gud hous cooperation documenting April 1978 83 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 83, 84
Winner Best Scale IN RESEARCHING usually finds sometimes endin2 weak data photos i-vie Award hi remark U Stephen J ever project ni ending up fest itself Such Fairchild After cover EAA Sport N jilt either ft call made 60 miles distant ye Tom Leonhai day picture ns As carefu Left Steve Sterling Award won 77 Nats Award made top static points although plane must make official flight qualify Stinson Voyager won same award 1975 Above Separate wing panels preserve uninterrupted line fuselage top Panels easier build finish one-piece wingand simple attachment system fool-proof 8 Model Aviation Vegas enables normally tiown twoiols thought con cerningespecially important scaleri em strong order survivehand other keep em light because once hit its over anyway think can take credence both approaches depend ing particular type project pre fer former because first flight Las Vegas disaster flying along 10-feet altitude An airplane never should have taken off engine barely half throttle stubborn author insisted attempting fly against wishes able John Roth managed baby Fairchild air straight mounting plans n originai ma us servo bati yards no Otto turn mode e minimal nose cowl landing gear fairing plane back air hour completed two su flights highly doubt feasil lighter built construction practicality sacrificing strength prop erly designed model can inherit tremen dous strength simple techniques strength can induced needed no penalty weight model de signed along conventional lines fre quent references perspective sketches should help clarify prob lem areas y iii mble epoxy Cement vertical b*ih iction ment lywood Ut efore rizing yourself types wood cabin ubood -bal twoclear ance noics tor tneass tubing Secondly attachand epoxy two 015 brass plates tue 1/16 ply wood bottom before assembling sides After framing door opening fore stringers landing gear main fair ing 3/16 dowel compression strut can April1978 9 Rudder elevator s tion arrangement rudder moved bin floor accessible thro htn shows belicrank di Nyrod foreground plans show mo# red Nyrod pu igement resists Seen through di w&ng spars rele Good engineering thing Check give builder 10 Model ip servos mounted ca irn plan top view wing An ervos allow bottom hatch st balsa stwck struts 1 h 1 La ritA ce 5 four ovei e lf NOSE COWLI/B BALSADP2 PLANRINAC.PlOELEVATOR ABP12SOFTBALSACOSTS HORN CARVEFROM71 TAiLWSEER~ /1 15I SPRUCEIIPAIRING BATT ROT 44-B-SCABSRVOOESS ~eOcSA AVSSET 121z[S 005CC 1 IFI SAUNA SLOCEF. SCAR ROT FlMAPLE BLOCES I/IS PLTWTOO UF VEAR STRAPS TO MAPLE BLOCOS I/O ROLSR-l//1/ V S/S SAL S RP'BA LS V R-A- S IDES SVSA BALSA S/IS PLTRAVOBOTTOM fF98 P7U 5000CR CONTROL CARLES 2 SCOT F8 U F IIIi -T/TZ BALSA S TESU plo P9 __ I/S SOUSA PLANKING PASELASE CONNTRACTIONCABIN SIRES REPOSE FOSUESS STRINGERS LORINATE I/VT PLYWOCO LVBINATEOCARVEFROSA- / 00 ACETATE/ OTT ABS SALOOq~ Ii 0 0/ISI rr--SPRACESIFB1IP915F10Tfii /SWITOSIIu 50lJ- ELEVATOR OPSOCEIIRAOOES CARIN SITEU II/TO PLTSCSTOT- II IS FR0/TA SALGAP55 I TO GIS BRATS EPOR/ PATTT FIRESOLASS WHEEL PANTS BAR/C FOAT VALVES FAIRCHILD RANGER 24 OESIGBEO SNO OSRWN BRPLATE o.I/ATM SCALE -a M 0 5 -I 0 75i $ j cg1 FORM HIG ATASS US SHOWN TO ALIOE OVER OGO U ASSEMBLE SPRING I116 BALSA II CH TO P16 BHO-~ LIEW*O RTOHITr~IX SA WAW4j7ThWI BALSA WAW6WAW5 W4WW44W3iiW2 WAAIiz- p I IIIOHlrlTGGHHlFT B = I W NG TIPS ZTHTO BALSA TOTEr1116 BALSA SHEET fIII L GOLUCH 4 RLOCEN\ SCREW EPOGY TO SCREW 4 EPOHYP15 PLOWOOG RUPLE RLHCES TO i HAN PLORUOGTHT SO BALSA URRIT FROM AD TO WILEAPING EGUESSPRUCE WINA SPARS ___ ____ ____ Tz -— III IIIII 0II II-____ U — 0 ____—= ._____ ____ ______________IEHB -W4 W211W3G~PW4HTW4W4W4W5 IHB IHW6ANNANAW6W6 II_____TPLH.HIS OIA61 _______ MRAN\7 — 4AI1~ __ II~JI - I--_ PLAP SHIN RALSAFLAPRINSE TAPERES AS STOWSP15FORMICA LELEO BORN N1- IIWS II II II IITAPER EPHET TO TA SHEETTOTTAM SHEET FLATTENSOLSER RRUHS ORILL TAP FOR SILOER SHLGER W RB NWA BR TOT I-TO MNXXk/LI SWOO RRNRROE MNW-7HIS SHEET BALSA HH PA SO SPRUCETHIS TOWEL RING 4 SOLGERFIRERALAGS SOLUER OIT BRASSBRASS TARN EHOATOOPLTWHHO 4 UHIT THUGSSGLOCR 0I05AST FAIRCHILDRANGER 24 DESIHTED ANG ORGWN RTPLUTE IPX TO SCALEA OF 2 FULL-SIZE PLANS AVAILABLESEE PAGE 104 pHI WI WI 0 o WB Although scale m case about stringers gi involves cererug aetalung imary fuselage box visil simulated batter cabin detailing have inspect act Sport Scale pr o separates men hese details since ma nd off 10 feet exu single detail picture showath allo hole two 4-4C mounted tuselage no tI20 epoxied blind nuts 4-40 screv iventional foam d horizont er top tbi rudder Add a complete g made fror od wheel fox soldered 010 Sig eaIs attachir s tubing Notice epoxied Two flex rod c control steerable tail wheel turns rudder Gear A normal L lb load i pilot makes ngs Althot iaster u cra uld r wing tip sport oi 14 lv rr lay flue P keyh hold Dotai o stitchi~ mor ome some pant ar two nv 1/64detrain bent overvel tap Aut rch pailL pox transi th wire sm Ip IL screw anain Covering & FinishingmodellarUt C covered Sig silk except wood surfaces finished K&B resin primed auto-lacquer pri mer After brushing two coats butyrate clear thinned 50% silk surfaces pinking tape applied thinned white glue Rib stitching simulated applying beads Titebond tooth pick numerous methods simulating pinking tape problem pre-doped Silkspan tissue sharp Saran Wrap serrated edge still end up frayed edges found tracing vellum gives best definition does require pre-doping although little effort required adhere doped surface hence thinned white glue Spray additional two three coats clear over silk surfaces two coasts gray butyrate will make silk surfaces compatible tone wood surfaces finished gray lacquer primer succeeding coats yellow has poor covering qualities anyway will result match preparing wood surfaces polyester resin remember quality finished product will good shaping sanding done balsa wood may have flow resin sections cowl because its shape since tends run over sides Finish 400 wet-or-dry spray few coats gray auto-lacquer primer Sand completely off 300-400 wet-or-dry will notice primer begins fill low spots prefer sand dry since easier tell part paper used part clean use handy damp sponge wipe off dust resi due Final sanding should done 500-600 wet-or-dry paper attempt spray component time such fuselage stab rudder etc Otherwise will end up im proper coverage overspray runs etc Since fuselage tail dif ficult some sort fixture must made accommodate surfaces horizontal spray gun Visualize framework scrap furring strips built support rotate model such would barbecue spit now possible keep surfaces horizontal painting time rotate fuselage completely around ready apply second coat No two coats butyrate 24hour period Vinyl contact paper makes good masking stencil spraying numerals rudder Black pin striping accom either thin stick-on vinyl tape method want something permanent use #3 Rapidograph India ink designed use mylar film Spray dust coat two clear seal ink Cut template flat 030-040 ace tate windshield Cement place 16 Model Aviation landing gear again wing Struts SlIp cuff fastened posi tion Allen screws blind nuts Lower part telescoping main strut brass tubing Wilbold RC-56 white glue Make garnish trim molding 030 ABS flat stock paint before applying wind shield RC-56 glue Apply door window inside cut 3/16-thin rear window molding apply over rear window outside Door handles made either brass aluminum may made function can fixed case hook should epoxied inside door rubberband holding doors tight against fuselage exhaust stacks simulated eter Plastruct covered bright foil painted Flying Originally K&B 61 stalled beam mounts proximity exhaust stack inside cowl necessitated aluminum header right angles order route exhaust gases rearward No room expansion chamber created kinds over heating problems besides being able keep engine running final ap proach first four test flights ended up dead-stick landings suspected small cowl opening contributing factor overheated en gine later learn significant two culprits aluminum manifold created much back pressure exhaust gases no place go Additional room provided some sort expansion cham ber muffler Secondly air entering small opening became turbulent effectively cooling cylinder fins way through out bottom open ing maple beam mounts sawed off flush firewall using Kraft radial mount engine rotated front view far over possible po sition put cylinder behind cowl opening allowed design I-in diameter expansion tube muffler Fabri cate tin stock silver solder solve second problem required ex pertise some engine experts namely Big Al Adamisin Ron Plotske conclusion size cowl opening problem since exit opening certainly sufficient Air turbulent around cylinder passing through fins re quired since inside cowl got larger went rearward air tended favor inside shape Some sort baffle needed Borrowing earlier days speed simple alu minum baffle strapped around cyl inder forcing intake air go through fins out backside next practice session enjoyable first opportunity taxi back another takeoff K&B finally idl ing running properly model flew right off drawing board smooth ap plication power brings ship right up its main gear down elevator Normal flying done just over Continued page 83 April 1978 17 Lower portion rudder showing scale permanent trim tab Other points interest tail wheel fork fin fillet portion elevator fiiqht trim tab simulated rivets upper portion ruddenumeeis ou ted black No 3 Fa1 era lighting make hinge line visible out ordinary light baremy discernible Letters Editor continued page 58 course RC model can sorts aerobatics real aircrafi can do.. Size am writing say thanks excellent article About Size Bradford Powers appeared 1/78 edition magazine Mr Powers presented material clear interesting manner yet supplied enough background equations logic make article value practical application Please let us see articles author others subject model aerody namics David U Zwolak Cincinnati OH Dream Site am 30 members Cen tour Radio Club East Liverpool Ohio club has picked up about 8 new members last 6 months May no field fly wrote head Parks Ohio asked permission RC club use part vast 22000 acres Ohio Beaver Creek State Park Old mills ground flour water over 100 years ago rolling hills etc park manager former Navy carrier pilot escorted us about 5 miles gave us nice field about 25 acres fly put log chains across entrance told us keep locked up avoid pot parties trouble before got members keys pad lock have nice place fly 1 mile nearest house Edwin H Orr East Liverpool OH Well Ill what its worth may offer following Two years ago test flying Wakefield al tube no file put up down R/L thrust did have rudder tab Because aircraft power stalling thought well put some right tab rudder Wind came up same next Sunday Following Sunday full power flights some ground After considerable thought about titude model powering up through air realized Am flying RR rudder tab set right As aircraft rolled right vertical tail slowly became stab What does aircraft down elevatordive comments Ive recd very good modelers Well Ill Don Eggersperger Redondo Beach CA Fairchild Ranger/Sauger continued page 17 half throttle full flaps slow fly-by about ttle about 10-mph headwind close scale fly ing speed possible Full flaps recom mended landings except strong winds means power landing As indicated earlier model will stay ground through rollout very little down trim Time dismantle Remove eight 4-40 screws Reach inside cabin unhook servo quick-release pushrods Squeeze two finger tabs slide out wing time Total time about three minutes little effort con struction youll apppreciate aes thetic value clean fuselage have simpler task storing certainly wish everyone success building flying Fairchild especially may consider graduating Sport Scale AMA appreciation owners N77661 Tom Leonhardt Dick Buck Jud Gud hous cooperation documenting April 1978 83 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review