THERE ARE generally speaking two kinds RCers participate SportScale contests first competent flier builds scale kit can compete both events usual Pat tern/Scale contest other dedi cated scale nut would rather build flyand enters contests because six entrants five prizes stands good chance taking home some loot latter type satisfied keeps miniature airplane pieceand often leaves something desired stick-twiddler Tutor designed dedicated Stand-Off Scale Nutto let him obtain maintain flying proficiency counts rivets checks out exact color schemes builds beautifully-detailed replicas Its quickly-built relatively stable flying design has characteristics usual scale model Its tail-dragger because preponder ance scale models feature tailwheel Its high-winged monoplane because stable scale ships have configu ration has cabin concession semi-realism can built about three weeks evenings couple week endsbecause no true scale builder will want dawdle over construction mere trainer has inset ailerons since few real airplanes have strip ailerons Finally model comfortably mid-sized may flown 25- 35-size engine yet its 46-in wing itll fit cars assembled have choice underpower bit itll probably respond like scale model Incidentally name Tutor indicates training model raised Nth Power isnt intended model abso lute RC beginner Rather requires flying building abilities modeler two three successful RC birds under belt turn page Top Transparent Solarfilm shows off whats inside prototype sniffs clear Colorado air Tutorn builds fastwas ready flight less two months after designers pencil first touched paper way go scratchbuilt modelspre kit Bits pieces ready assembly Fuel tank platform rests 1/16 plywood fuselage doublers Fuselage sides foam core framed 3/16 sq balsa strips January 1977 41 TUTOR LE 5/16 SQ BALSAN. I- ----i--l— - - -i I---H---__ii II ~jIII TIFI ___IIij-Ht~mii1 I-i_______ IIII4II L1L~jj~iL STOP B BOTTOM WEBBINGWING I/8X3/8JOINERADJU TO SUI SERV TE 7/16X 1/4 BALSA J TYPICAL TIP SECTION AILERON EJ1 RIB 4 REQ 1/8 BALSA AILERON RB 6 REQ I/B SHEET BALSA Ii -II-- MAIJ RIB 10 REQ I/8SHEET BALSA ROOT RIB 4 REQ 1/8 SHEET BALSA -I T DOWEL K DIHEE -WiNG JOINER 1/8 PLYWOOD -V FOAM CORE TENFLATE REDUCE THICKNESS TO SUIT COVERHG -It - ft RIB 2 REQ 1/8 SHEET BALSA 4i F IL -SCRAP BLOCK1/16 PLYWOOO GUSSET SHEETPAIRING ______ BALSA.B SECTION AT COWLWING PLATFORMBALANCEj TANK HATCH SPLITI/8DOWELI030 CLEAR COWL-HATCH 10 34X4X 5/83/8 TRIANGLEBUTYRATE BALSA OR FOAM STOCK GUSSETTO HERE 2SPINNER--3/16 X 1/2 BALSA KRAFT4-X FUEL TANK_____ AAII _____ El NII IIII------_ II -I -IJI S--II II1 Iii CEr —ITANK PLATFORMNII II II 3/16FOAM CORE N FILL WITH SCRAP-OR SHEET BALSAII BALSA I I II Nil OIL DRAIN HOLEI1N ________ I HALCO LG RETAIN WITH1/2 TRIANGLE STOCK 6-32HARDWARE3/16 PLYWOOD 0 I/ IFILL IN FUSELAGE BOTTOMINDICA o vi FROM FORMER FORWARDDOUBI NOSE RING WALLINDICATE I/B PLYWOODI/4PLY WOOD2 1/2 WHEELSFCM CO _____SHEET F 11 I TIPS BALSA BLOCK IJIJL II t41-i-i--- ___II-t121____ II II III 11 ___________________ ii jI1 k-a1k-U-jViiII-4 U-Iwzri4IHc ___II -- I.jJIj~Urzz7 IL __n- PNIING -s x 3/8 LE AILERON TORQUE ROD 1/8NYROD MUSIC WIEOUTER FOR MORE POSITIVE AILERON ACTION EAK iINCREASE AILERON AREA INBOARD PLYWOOD .j.. 6 3/16 SHEET - ------3A&XI/2 A CROSSPIECES 3/16 SQ BALSA APPROX WINDSHIELD PATTERN CUT FROM 030 CLEAR BUTYRATE BALSA IG STOP INSERT FRONT WING HOLD DOWN DOWEL AFTER WINDSHIELD S WINDOWS 1 ARE GLUED IN PLACE 1/16 PLYWOOD 3/8 TRIANGLE/ /3/16 STOCK/1/SHEET LIGHTENING HOLES TAIL WHEEL BRACKET LONGERONS & FRAME 3/16 SQ BALSABONNER DUBRO ETC 3/I6X3 BALSA TYP ___________X 3/16 BALSA ltI/8 -J 3/16 SHEET TAILWHEEL 3/4 PERFECT 1/8 X 3/1616 SPRUCE DESIGNED & DRAWN BY JOHN DE VRIES TRACED FOR MOOEL AVIATION BY RAY BORDEN 0I23456 /1/ ii ALSA LINE OD IE OF 3/16 LSA SIDES AFT FORMER 3/I6FOAM CORE OR BALSA choose go foam wing route Tutor builds super-fast plans show ribs both foam built-up wings show foam wing template full-sizedwithout allowance cov ering planking Thin extent re quired material intend use 1/16 sheet balsa plywood veneer card Inlet /8 plywood spar joiner center-section strength foam wing dont forget groove foam cores aileron torque rods before cover Aileron spars sheet balsa should Titebonded place give hinges attachment area chose make built-up wing prototype model requires 22 ribs cut sheet balsa Just looks cut five lightening holes rib cause knew handiwork should visible through transparent Solarfilm intended covering material ribs still stacked torque-rod holes drilled through Spars /t X 3A balsa leading edge 5/16-sq balsa ribs inlet /t Front-end view showing 1/B ply nose ring Contours faired boxy-shaped fuselage Upper cowl Cut away provide Clear ance muffler needle valve standard Sig 1 /4 trailing-edge stock Note built-up wing rib pattern calls 1/16 sheeting leading edge aft spars ailerons course built part wing cut loose later Wing tips either type wing may carved balsa blocks laminated balsa sheet foam blocks Dihedral 1 tip rib above flat center section wing panel Add aileron torque rods after wing assembled length outer Nyrod acts fulllength torque rod bearing Vt music wire actuating rod Strip-aileron-type hardware ties torque rod servo -provides slop-free aileron action course can use bellcranks aileron movement prefer Before leave finished uncovered wing plans show 1/16 balsa webbing between spars ribs Add super-strong wing fuselage constructed 3/16 foam-core framed 3/16-sq balsa can completely built about three hours using Titebond hold balsa foam-core Zap balsa-to-balsa joints Warn ing Keep Zap Hot Stuff away foam foam-core-it melts foam Cut fuselage sides foam-core material consists two layers card surrounding closed-foam layer Its Tutor The stabilizer ready covering pro totype model used transparent red Solar-film Tutor n purposely given charac teristics usual scale modelhence makes good trainer scale fans Below Sanded hinged fin/rudder has triangular stock added fins base providing strong gluing Lower hinge keyed place rudder horns mounting holes usually available well-stocked lumber yards its sold insulating board Foam-core fantastic modeling material 8-in-deep fuselage sides cost 60 pair compared $560 balsa used cut aftwing lightening holes its lighter Ecuador gold Frame cut-out sides 3/16-sq balsa using Titebond masking tape strips hold wood place Pin framed sides plan build-up cabin structure wings incidence set cabin align 3/16-sq upper longeron carefully fit 3/16 X n uprights precisely balsa fuselage framing intended permit Zapping cross pieces place fuselage boxedand may rounded relieve square look fuselage course 1/16 plywood forward fuselage doublers should contactcemented place before boxing fuselage making sure right- left handed fuselage side produced Note doublers reinforce cabin up rights right side doubler should cut 1 / 16 shorter its front edge left thus building proper amount right-thrust ood firewall butts against doublers assembled fuse lage Drill firewall appropriate 44 Model Aviation Construction Kraft-Hayes other engine mount add blind nuts its rear face same rectangular 3/16 ply land ing gear mounta Hailco landing gear P/N B 105-3 will bolted later Theres former fuse lage Its cut foam-core serves primarily point support rudder elevator pushrods Assemble fuse lage gluing four 3/16 X s pieces place cabin area Rather sizing cross pieces plan measure precision Three cross pieces 3 long strument panel two fuselage bot tom front rear cabin area fourth cross piece 3 long aft upper cabin top fuselage cabin front former 3/16 balsa sheet completes basic assembly process aft-wing 3/16-sq cross pieces may fitted after fuselage sides drawn together tail Titebonded gether i/i rudder hinge block added Epoxy ter-square triangu lar stock balsa reinforcers firewallfuselage joint after firewall epoxied place Trace area forward strument panel aft firewall plan-view onto foam-core cut out fuel tank platform Its position within nose depends engine youre using prototype model used OS 30 hummer Raise lower its position keep centerline fuel tank aligned needle valve its glued place strengthens fuse lage substantially Epoxy gear mount place foam-core rectangles form fuselage floor reinforce fuselage doublers triangular stock Bolt engine mount place bolt engine put prop 2-in spinner engine shaft after hanging /8 plywood nose ring around Tape ply wood ring spinner back-plate couple 1/16 ply temporary spacers place fill nose area balsa foam blocks gluing place After blocks dry pull engine its mount tack-glue upper lower fuselage fairing blocks place Precut upper block balsa foam fuel tank hatch separation sand whole nose fuselage fairing back plywood nose ring sanding blocks Microballoons resin will fill dings depressions resulting sanding process cowl sanded shape re move tank hatch hollow tank clearance Itll have cut out clear engine exhaust pipe muffler well needle valve Devise hatch hold-down prototype model used long 4-40 bolt screwed tapped hole top edge firewallthe rear edge hatch wide enough prevent its twisting Wing dowel ply doublers glued place well cabin gussets ply Right Assembled wing center section showing torque rod aileron actuating system Foam cores can substitutedand build faster Below Eye-catcher think youll agree Leading edge center section covered white Super Monokote center quarter-square under forward cabin former aft-wing stop squared fuselage epoxied proper position Nothing too exotic about Tutors tail feathers plans show hardwood spars /8 X 3/16 spruce both rudder stabilizer local hobby shop out wood substituted 3/16 X a prototype model Rudder stab ribs stripped 3/16 balsa sheet theyre /s wide glued 3/16 X ing continued page 94 January 1977 45 Servos lost space Note fuselage former being used hold servo ends elevator rudder pushrods gusseting cabin areas Only formerfoam core CL Navy Carrier/Perry continued page 32 some Profile Carrier models illegal also un safe Nats year large Perfect clip failed during pull-test sub jected 25-lb load well-known Carrier modeler name will mention lost Class II model year Perfect clip up line failed flight Ive seen similar accidents other events photograph accompanying column depicts Pylon brand line connec tors Sullivan clips come two sizes rated 80 lb 110 lb other type clip will use have made myself photo also shows wrapped line terminations thimbles recom mended rule book two-line con struction Wrapped lines stronger crimped terminations easier inspect possible damage also easy make set can made watching favorite TV show thimbles available Perfect sleeves crimped line ends Sullivan serving wire included Larger thimbles included free small package modeling hardware buy local hobby shop Dont take chance losing air plane engine possibly injuring spectator fellow modeler right first time dont have again Soapbox Department numerous proposals before CLCB require reward realistic Profile Carrier models would like very much see realistic models event have talked Carrier modelers agree problems however almost proposals principal concern existing models made obsolete rule change mandatory require ment scale outlines close re semblance would make existing models illegal Scale bonus points can used effectively points awarded few enough non-scale existing models automatically eliminated competition requirement 5% scale tolerance however would eliminate kit airplaneseven G-S Bearcat think good idea Review proposals thinking about would like solve problems Get ready cross proposals would like add realism Profile event Write CLCB represen tative tell him support opposition various proposals way better event through participation rules-making process No has right complain about rules has never taken time let CLCB representative know opinions Richard L Perry 5016 Angelita Ave. Dayton OH 45424 Tutor ide Vries continued page 45 trailing edges Triangular stock added aft fuselage serve widened stabilizer platform fin pro vide reinforced fin/stabilizer gluing joint prototype model bit wood inlet lower edge rudder commercial tailwheel assembly chosen would fit 3/16thick surface long 3/32 music wire tailwheel strut will work other tailwheel bracketsand hold eter tailwheel Extra rudder hinges four recommended assure good rudder action reliable tailwheel steering Nothing much left covering radio installation always-onerous details finishing model Add windshield front dowel glassed areas use 030 clear buytrate plastic windshield windows Epoxy wing hole-down dowels place Bolt engine landing gear place use 2 diame ter main wheels Most radios lostin cavernous fuselage Tutor Theres lots room swathe receiver batteries anti-vibration foam protective plastic baggies Use servo trays fuselage installation making sure theyre posi tioned no strain placed connecting wires wires aile ron servo Theres no problem balancing Tutor fact receiver 450-mah battery prototype model positioned aft servos against fuselage former balance point slightly forward wing spars Flying airfoil computer-plotted 9 Clark-Y section model slightlyheavy 4 pounds slightly-underpowered purpose tail-dragger Make sure models balanced main gear tailwheel track straight ahead Triple-check everything first-flight check-list fire er up Like high-winged models Tutor rudder airplanethe aile rons arent too effective hence sugges tion plans ailerons should extended full rib-bay side Theres lot rudder elevator area use gingerly until have feel effectiveness Remember Tutor designed react like scale model pattern ship takeoff wind above 10 knots Tutor will leap air par ticularly helper holds model run engine up maximum revs Fly rudder until its well up can check effect aile rons Landings made almostlevel attitude since thats way gear set Rudder elevator effective gliding speeds final approach may played almost down stalling speed So use Tutor build up flying time proficiency build precise beautiful complex examples model-building art Hall Fame/i 976 continued page 54 Plans 80 different Ehling designed planes have published model ing magazines through years original designs have kitted Jetco Jasco Scientific Polks designs have won great number contests have responsible starting new trends model plane design Since Franks models designed newer young er modelers mind simple fool proof yet always maintained high level per form ance As result model designs instru mental attracting young people aeromodeling field Ebling has always innovator early competitor expertise recognizing loop holes rules has contributed success Technical Director Academy Model Aeronautics 20s competition rules much simpler today Intended new compressed-air model motors rules stated power may used famous story has contest Frank waited until other fliers turn called timer plane tiny thought too small successfuland string attached ran cigar box Ehling launched ship offi cial flight opening box Out flew pigeon pulling model aloft 00S max Franks crowning achievement Delta Dart No single model design has done create good will good publicity model aviation well introduce young sters over world wonderful sport building flying model planes Hundreds thousands kits have produced date profit Ebling other personal satisfaction since donated design AMA model industry As Technical Director Academy Model Aeronautics also Advertising Manager AMAs monthly magazine Model Aviation Frank currently key figure national organization very much respect ed everyone model aviation industry abilities accomplishments Few men aeromodeling well known over world 94 Model Aviation COX ENGINES COX/SANWA R/C SYSTEMS AIRTRONICS KITS Send C complete catalog 1525 E Warner Ave Santa Ana CA 92702 HOBBIES
Edition: Model Aviation - 1977/01
Page Numbers: 41, 42, 43, 44, 45, 94
THERE ARE generally speaking two kinds RCers participate SportScale contests first competent flier builds scale kit can compete both events usual Pat tern/Scale contest other dedi cated scale nut would rather build flyand enters contests because six entrants five prizes stands good chance taking home some loot latter type satisfied keeps miniature airplane pieceand often leaves something desired stick-twiddler Tutor designed dedicated Stand-Off Scale Nutto let him obtain maintain flying proficiency counts rivets checks out exact color schemes builds beautifully-detailed replicas Its quickly-built relatively stable flying design has characteristics usual scale model Its tail-dragger because preponder ance scale models feature tailwheel Its high-winged monoplane because stable scale ships have configu ration has cabin concession semi-realism can built about three weeks evenings couple week endsbecause no true scale builder will want dawdle over construction mere trainer has inset ailerons since few real airplanes have strip ailerons Finally model comfortably mid-sized may flown 25- 35-size engine yet its 46-in wing itll fit cars assembled have choice underpower bit itll probably respond like scale model Incidentally name Tutor indicates training model raised Nth Power isnt intended model abso lute RC beginner Rather requires flying building abilities modeler two three successful RC birds under belt turn page Top Transparent Solarfilm shows off whats inside prototype sniffs clear Colorado air Tutorn builds fastwas ready flight less two months after designers pencil first touched paper way go scratchbuilt modelspre kit Bits pieces ready assembly Fuel tank platform rests 1/16 plywood fuselage doublers Fuselage sides foam core framed 3/16 sq balsa strips January 1977 41 TUTOR LE 5/16 SQ BALSAN. I- ----i--l— - - -i I---H---__ii II ~jIII TIFI ___IIij-Ht~mii1 I-i_______ IIII4II L1L~jj~iL STOP B BOTTOM WEBBINGWING I/8X3/8JOINERADJU TO SUI SERV TE 7/16X 1/4 BALSA J TYPICAL TIP SECTION AILERON EJ1 RIB 4 REQ 1/8 BALSA AILERON RB 6 REQ I/B SHEET BALSA Ii -II-- MAIJ RIB 10 REQ I/8SHEET BALSA ROOT RIB 4 REQ 1/8 SHEET BALSA -I T DOWEL K DIHEE -WiNG JOINER 1/8 PLYWOOD -V FOAM CORE TENFLATE REDUCE THICKNESS TO SUIT COVERHG -It - ft RIB 2 REQ 1/8 SHEET BALSA 4i F IL -SCRAP BLOCK1/16 PLYWOOO GUSSET SHEETPAIRING ______ BALSA.B SECTION AT COWLWING PLATFORMBALANCEj TANK HATCH SPLITI/8DOWELI030 CLEAR COWL-HATCH 10 34X4X 5/83/8 TRIANGLEBUTYRATE BALSA OR FOAM STOCK GUSSETTO HERE 2SPINNER--3/16 X 1/2 BALSA KRAFT4-X FUEL TANK_____ AAII _____ El NII IIII------_ II -I -IJI S--II II1 Iii CEr —ITANK PLATFORMNII II II 3/16FOAM CORE N FILL WITH SCRAP-OR SHEET BALSAII BALSA I I II Nil OIL DRAIN HOLEI1N ________ I HALCO LG RETAIN WITH1/2 TRIANGLE STOCK 6-32HARDWARE3/16 PLYWOOD 0 I/ IFILL IN FUSELAGE BOTTOMINDICA o vi FROM FORMER FORWARDDOUBI NOSE RING WALLINDICATE I/B PLYWOODI/4PLY WOOD2 1/2 WHEELSFCM CO _____SHEET F 11 I TIPS BALSA BLOCK IJIJL II t41-i-i--- ___II-t121____ II II III 11 ___________________ ii jI1 k-a1k-U-jViiII-4 U-Iwzri4IHc ___II -- I.jJIj~Urzz7 IL __n- PNIING -s x 3/8 LE AILERON TORQUE ROD 1/8NYROD MUSIC WIEOUTER FOR MORE POSITIVE AILERON ACTION EAK iINCREASE AILERON AREA INBOARD PLYWOOD .j.. 6 3/16 SHEET - ------3A&XI/2 A CROSSPIECES 3/16 SQ BALSA APPROX WINDSHIELD PATTERN CUT FROM 030 CLEAR BUTYRATE BALSA IG STOP INSERT FRONT WING HOLD DOWN DOWEL AFTER WINDSHIELD S WINDOWS 1 ARE GLUED IN PLACE 1/16 PLYWOOD 3/8 TRIANGLE/ /3/16 STOCK/1/SHEET LIGHTENING HOLES TAIL WHEEL BRACKET LONGERONS & FRAME 3/16 SQ BALSABONNER DUBRO ETC 3/I6X3 BALSA TYP ___________X 3/16 BALSA ltI/8 -J 3/16 SHEET TAILWHEEL 3/4 PERFECT 1/8 X 3/1616 SPRUCE DESIGNED & DRAWN BY JOHN DE VRIES TRACED FOR MOOEL AVIATION BY RAY BORDEN 0I23456 /1/ ii ALSA LINE OD IE OF 3/16 LSA SIDES AFT FORMER 3/I6FOAM CORE OR BALSA choose go foam wing route Tutor builds super-fast plans show ribs both foam built-up wings show foam wing template full-sizedwithout allowance cov ering planking Thin extent re quired material intend use 1/16 sheet balsa plywood veneer card Inlet /8 plywood spar joiner center-section strength foam wing dont forget groove foam cores aileron torque rods before cover Aileron spars sheet balsa should Titebonded place give hinges attachment area chose make built-up wing prototype model requires 22 ribs cut sheet balsa Just looks cut five lightening holes rib cause knew handiwork should visible through transparent Solarfilm intended covering material ribs still stacked torque-rod holes drilled through Spars /t X 3A balsa leading edge 5/16-sq balsa ribs inlet /t Front-end view showing 1/B ply nose ring Contours faired boxy-shaped fuselage Upper cowl Cut away provide Clear ance muffler needle valve standard Sig 1 /4 trailing-edge stock Note built-up wing rib pattern calls 1/16 sheeting leading edge aft spars ailerons course built part wing cut loose later Wing tips either type wing may carved balsa blocks laminated balsa sheet foam blocks Dihedral 1 tip rib above flat center section wing panel Add aileron torque rods after wing assembled length outer Nyrod acts fulllength torque rod bearing Vt music wire actuating rod Strip-aileron-type hardware ties torque rod servo -provides slop-free aileron action course can use bellcranks aileron movement prefer Before leave finished uncovered wing plans show 1/16 balsa webbing between spars ribs Add super-strong wing fuselage constructed 3/16 foam-core framed 3/16-sq balsa can completely built about three hours using Titebond hold balsa foam-core Zap balsa-to-balsa joints Warn ing Keep Zap Hot Stuff away foam foam-core-it melts foam Cut fuselage sides foam-core material consists two layers card surrounding closed-foam layer Its Tutor The stabilizer ready covering pro totype model used transparent red Solar-film Tutor n purposely given charac teristics usual scale modelhence makes good trainer scale fans Below Sanded hinged fin/rudder has triangular stock added fins base providing strong gluing Lower hinge keyed place rudder horns mounting holes usually available well-stocked lumber yards its sold insulating board Foam-core fantastic modeling material 8-in-deep fuselage sides cost 60 pair compared $560 balsa used cut aftwing lightening holes its lighter Ecuador gold Frame cut-out sides 3/16-sq balsa using Titebond masking tape strips hold wood place Pin framed sides plan build-up cabin structure wings incidence set cabin align 3/16-sq upper longeron carefully fit 3/16 X n uprights precisely balsa fuselage framing intended permit Zapping cross pieces place fuselage boxedand may rounded relieve square look fuselage course 1/16 plywood forward fuselage doublers should contactcemented place before boxing fuselage making sure right- left handed fuselage side produced Note doublers reinforce cabin up rights right side doubler should cut 1 / 16 shorter its front edge left thus building proper amount right-thrust ood firewall butts against doublers assembled fuse lage Drill firewall appropriate 44 Model Aviation Construction Kraft-Hayes other engine mount add blind nuts its rear face same rectangular 3/16 ply land ing gear mounta Hailco landing gear P/N B 105-3 will bolted later Theres former fuse lage Its cut foam-core serves primarily point support rudder elevator pushrods Assemble fuse lage gluing four 3/16 X s pieces place cabin area Rather sizing cross pieces plan measure precision Three cross pieces 3 long strument panel two fuselage bot tom front rear cabin area fourth cross piece 3 long aft upper cabin top fuselage cabin front former 3/16 balsa sheet completes basic assembly process aft-wing 3/16-sq cross pieces may fitted after fuselage sides drawn together tail Titebonded gether i/i rudder hinge block added Epoxy ter-square triangu lar stock balsa reinforcers firewallfuselage joint after firewall epoxied place Trace area forward strument panel aft firewall plan-view onto foam-core cut out fuel tank platform Its position within nose depends engine youre using prototype model used OS 30 hummer Raise lower its position keep centerline fuel tank aligned needle valve its glued place strengthens fuse lage substantially Epoxy gear mount place foam-core rectangles form fuselage floor reinforce fuselage doublers triangular stock Bolt engine mount place bolt engine put prop 2-in spinner engine shaft after hanging /8 plywood nose ring around Tape ply wood ring spinner back-plate couple 1/16 ply temporary spacers place fill nose area balsa foam blocks gluing place After blocks dry pull engine its mount tack-glue upper lower fuselage fairing blocks place Precut upper block balsa foam fuel tank hatch separation sand whole nose fuselage fairing back plywood nose ring sanding blocks Microballoons resin will fill dings depressions resulting sanding process cowl sanded shape re move tank hatch hollow tank clearance Itll have cut out clear engine exhaust pipe muffler well needle valve Devise hatch hold-down prototype model used long 4-40 bolt screwed tapped hole top edge firewallthe rear edge hatch wide enough prevent its twisting Wing dowel ply doublers glued place well cabin gussets ply Right Assembled wing center section showing torque rod aileron actuating system Foam cores can substitutedand build faster Below Eye-catcher think youll agree Leading edge center section covered white Super Monokote center quarter-square under forward cabin former aft-wing stop squared fuselage epoxied proper position Nothing too exotic about Tutors tail feathers plans show hardwood spars /8 X 3/16 spruce both rudder stabilizer local hobby shop out wood substituted 3/16 X a prototype model Rudder stab ribs stripped 3/16 balsa sheet theyre /s wide glued 3/16 X ing continued page 94 January 1977 45 Servos lost space Note fuselage former being used hold servo ends elevator rudder pushrods gusseting cabin areas Only formerfoam core CL Navy Carrier/Perry continued page 32 some Profile Carrier models illegal also un safe Nats year large Perfect clip failed during pull-test sub jected 25-lb load well-known Carrier modeler name will mention lost Class II model year Perfect clip up line failed flight Ive seen similar accidents other events photograph accompanying column depicts Pylon brand line connec tors Sullivan clips come two sizes rated 80 lb 110 lb other type clip will use have made myself photo also shows wrapped line terminations thimbles recom mended rule book two-line con struction Wrapped lines stronger crimped terminations easier inspect possible damage also easy make set can made watching favorite TV show thimbles available Perfect sleeves crimped line ends Sullivan serving wire included Larger thimbles included free small package modeling hardware buy local hobby shop Dont take chance losing air plane engine possibly injuring spectator fellow modeler right first time dont have again Soapbox Department numerous proposals before CLCB require reward realistic Profile Carrier models would like very much see realistic models event have talked Carrier modelers agree problems however almost proposals principal concern existing models made obsolete rule change mandatory require ment scale outlines close re semblance would make existing models illegal Scale bonus points can used effectively points awarded few enough non-scale existing models automatically eliminated competition requirement 5% scale tolerance however would eliminate kit airplaneseven G-S Bearcat think good idea Review proposals thinking about would like solve problems Get ready cross proposals would like add realism Profile event Write CLCB represen tative tell him support opposition various proposals way better event through participation rules-making process No has right complain about rules has never taken time let CLCB representative know opinions Richard L Perry 5016 Angelita Ave. Dayton OH 45424 Tutor ide Vries continued page 45 trailing edges Triangular stock added aft fuselage serve widened stabilizer platform fin pro vide reinforced fin/stabilizer gluing joint prototype model bit wood inlet lower edge rudder commercial tailwheel assembly chosen would fit 3/16thick surface long 3/32 music wire tailwheel strut will work other tailwheel bracketsand hold eter tailwheel Extra rudder hinges four recommended assure good rudder action reliable tailwheel steering Nothing much left covering radio installation always-onerous details finishing model Add windshield front dowel glassed areas use 030 clear buytrate plastic windshield windows Epoxy wing hole-down dowels place Bolt engine landing gear place use 2 diame ter main wheels Most radios lostin cavernous fuselage Tutor Theres lots room swathe receiver batteries anti-vibration foam protective plastic baggies Use servo trays fuselage installation making sure theyre posi tioned no strain placed connecting wires wires aile ron servo Theres no problem balancing Tutor fact receiver 450-mah battery prototype model positioned aft servos against fuselage former balance point slightly forward wing spars Flying airfoil computer-plotted 9 Clark-Y section model slightlyheavy 4 pounds slightly-underpowered purpose tail-dragger Make sure models balanced main gear tailwheel track straight ahead Triple-check everything first-flight check-list fire er up Like high-winged models Tutor rudder airplanethe aile rons arent too effective hence sugges tion plans ailerons should extended full rib-bay side Theres lot rudder elevator area use gingerly until have feel effectiveness Remember Tutor designed react like scale model pattern ship takeoff wind above 10 knots Tutor will leap air par ticularly helper holds model run engine up maximum revs Fly rudder until its well up can check effect aile rons Landings made almostlevel attitude since thats way gear set Rudder elevator effective gliding speeds final approach may played almost down stalling speed So use Tutor build up flying time proficiency build precise beautiful complex examples model-building art Hall Fame/i 976 continued page 54 Plans 80 different Ehling designed planes have published model ing magazines through years original designs have kitted Jetco Jasco Scientific Polks designs have won great number contests have responsible starting new trends model plane design Since Franks models designed newer young er modelers mind simple fool proof yet always maintained high level per form ance As result model designs instru mental attracting young people aeromodeling field Ebling has always innovator early competitor expertise recognizing loop holes rules has contributed success Technical Director Academy Model Aeronautics 20s competition rules much simpler today Intended new compressed-air model motors rules stated power may used famous story has contest Frank waited until other fliers turn called timer plane tiny thought too small successfuland string attached ran cigar box Ehling launched ship offi cial flight opening box Out flew pigeon pulling model aloft 00S max Franks crowning achievement Delta Dart No single model design has done create good will good publicity model aviation well introduce young sters over world wonderful sport building flying model planes Hundreds thousands kits have produced date profit Ebling other personal satisfaction since donated design AMA model industry As Technical Director Academy Model Aeronautics also Advertising Manager AMAs monthly magazine Model Aviation Frank currently key figure national organization very much respect ed everyone model aviation industry abilities accomplishments Few men aeromodeling well known over world 94 Model Aviation COX ENGINES COX/SANWA R/C SYSTEMS AIRTRONICS KITS Send C complete catalog 1525 E Warner Ave Santa Ana CA 92702 HOBBIES
Edition: Model Aviation - 1977/01
Page Numbers: 41, 42, 43, 44, 45, 94
THERE ARE generally speaking two kinds RCers participate SportScale contests first competent flier builds scale kit can compete both events usual Pat tern/Scale contest other dedi cated scale nut would rather build flyand enters contests because six entrants five prizes stands good chance taking home some loot latter type satisfied keeps miniature airplane pieceand often leaves something desired stick-twiddler Tutor designed dedicated Stand-Off Scale Nutto let him obtain maintain flying proficiency counts rivets checks out exact color schemes builds beautifully-detailed replicas Its quickly-built relatively stable flying design has characteristics usual scale model Its tail-dragger because preponder ance scale models feature tailwheel Its high-winged monoplane because stable scale ships have configu ration has cabin concession semi-realism can built about three weeks evenings couple week endsbecause no true scale builder will want dawdle over construction mere trainer has inset ailerons since few real airplanes have strip ailerons Finally model comfortably mid-sized may flown 25- 35-size engine yet its 46-in wing itll fit cars assembled have choice underpower bit itll probably respond like scale model Incidentally name Tutor indicates training model raised Nth Power isnt intended model abso lute RC beginner Rather requires flying building abilities modeler two three successful RC birds under belt turn page Top Transparent Solarfilm shows off whats inside prototype sniffs clear Colorado air Tutorn builds fastwas ready flight less two months after designers pencil first touched paper way go scratchbuilt modelspre kit Bits pieces ready assembly Fuel tank platform rests 1/16 plywood fuselage doublers Fuselage sides foam core framed 3/16 sq balsa strips January 1977 41 TUTOR LE 5/16 SQ BALSAN. I- ----i--l— - - -i I---H---__ii II ~jIII TIFI ___IIij-Ht~mii1 I-i_______ IIII4II L1L~jj~iL STOP B BOTTOM WEBBINGWING I/8X3/8JOINERADJU TO SUI SERV TE 7/16X 1/4 BALSA J TYPICAL TIP SECTION AILERON EJ1 RIB 4 REQ 1/8 BALSA AILERON RB 6 REQ I/B SHEET BALSA Ii -II-- MAIJ RIB 10 REQ I/8SHEET BALSA ROOT RIB 4 REQ 1/8 SHEET BALSA -I T DOWEL K DIHEE -WiNG JOINER 1/8 PLYWOOD -V FOAM CORE TENFLATE REDUCE THICKNESS TO SUIT COVERHG -It - ft RIB 2 REQ 1/8 SHEET BALSA 4i F IL -SCRAP BLOCK1/16 PLYWOOO GUSSET SHEETPAIRING ______ BALSA.B SECTION AT COWLWING PLATFORMBALANCEj TANK HATCH SPLITI/8DOWELI030 CLEAR COWL-HATCH 10 34X4X 5/83/8 TRIANGLEBUTYRATE BALSA OR FOAM STOCK GUSSETTO HERE 2SPINNER--3/16 X 1/2 BALSA KRAFT4-X FUEL TANK_____ AAII _____ El NII IIII------_ II -I -IJI S--II II1 Iii CEr —ITANK PLATFORMNII II II 3/16FOAM CORE N FILL WITH SCRAP-OR SHEET BALSAII BALSA I I II Nil OIL DRAIN HOLEI1N ________ I HALCO LG RETAIN WITH1/2 TRIANGLE STOCK 6-32HARDWARE3/16 PLYWOOD 0 I/ IFILL IN FUSELAGE BOTTOMINDICA o vi FROM FORMER FORWARDDOUBI NOSE RING WALLINDICATE I/B PLYWOODI/4PLY WOOD2 1/2 WHEELSFCM CO _____SHEET F 11 I TIPS BALSA BLOCK IJIJL II t41-i-i--- ___II-t121____ II II III 11 ___________________ ii jI1 k-a1k-U-jViiII-4 U-Iwzri4IHc ___II -- I.jJIj~Urzz7 IL __n- PNIING -s x 3/8 LE AILERON TORQUE ROD 1/8NYROD MUSIC WIEOUTER FOR MORE POSITIVE AILERON ACTION EAK iINCREASE AILERON AREA INBOARD PLYWOOD .j.. 6 3/16 SHEET - ------3A&XI/2 A CROSSPIECES 3/16 SQ BALSA APPROX WINDSHIELD PATTERN CUT FROM 030 CLEAR BUTYRATE BALSA IG STOP INSERT FRONT WING HOLD DOWN DOWEL AFTER WINDSHIELD S WINDOWS 1 ARE GLUED IN PLACE 1/16 PLYWOOD 3/8 TRIANGLE/ /3/16 STOCK/1/SHEET LIGHTENING HOLES TAIL WHEEL BRACKET LONGERONS & FRAME 3/16 SQ BALSABONNER DUBRO ETC 3/I6X3 BALSA TYP ___________X 3/16 BALSA ltI/8 -J 3/16 SHEET TAILWHEEL 3/4 PERFECT 1/8 X 3/1616 SPRUCE DESIGNED & DRAWN BY JOHN DE VRIES TRACED FOR MOOEL AVIATION BY RAY BORDEN 0I23456 /1/ ii ALSA LINE OD IE OF 3/16 LSA SIDES AFT FORMER 3/I6FOAM CORE OR BALSA choose go foam wing route Tutor builds super-fast plans show ribs both foam built-up wings show foam wing template full-sizedwithout allowance cov ering planking Thin extent re quired material intend use 1/16 sheet balsa plywood veneer card Inlet /8 plywood spar joiner center-section strength foam wing dont forget groove foam cores aileron torque rods before cover Aileron spars sheet balsa should Titebonded place give hinges attachment area chose make built-up wing prototype model requires 22 ribs cut sheet balsa Just looks cut five lightening holes rib cause knew handiwork should visible through transparent Solarfilm intended covering material ribs still stacked torque-rod holes drilled through Spars /t X 3A balsa leading edge 5/16-sq balsa ribs inlet /t Front-end view showing 1/B ply nose ring Contours faired boxy-shaped fuselage Upper cowl Cut away provide Clear ance muffler needle valve standard Sig 1 /4 trailing-edge stock Note built-up wing rib pattern calls 1/16 sheeting leading edge aft spars ailerons course built part wing cut loose later Wing tips either type wing may carved balsa blocks laminated balsa sheet foam blocks Dihedral 1 tip rib above flat center section wing panel Add aileron torque rods after wing assembled length outer Nyrod acts fulllength torque rod bearing Vt music wire actuating rod Strip-aileron-type hardware ties torque rod servo -provides slop-free aileron action course can use bellcranks aileron movement prefer Before leave finished uncovered wing plans show 1/16 balsa webbing between spars ribs Add super-strong wing fuselage constructed 3/16 foam-core framed 3/16-sq balsa can completely built about three hours using Titebond hold balsa foam-core Zap balsa-to-balsa joints Warn ing Keep Zap Hot Stuff away foam foam-core-it melts foam Cut fuselage sides foam-core material consists two layers card surrounding closed-foam layer Its Tutor The stabilizer ready covering pro totype model used transparent red Solar-film Tutor n purposely given charac teristics usual scale modelhence makes good trainer scale fans Below Sanded hinged fin/rudder has triangular stock added fins base providing strong gluing Lower hinge keyed place rudder horns mounting holes usually available well-stocked lumber yards its sold insulating board Foam-core fantastic modeling material 8-in-deep fuselage sides cost 60 pair compared $560 balsa used cut aftwing lightening holes its lighter Ecuador gold Frame cut-out sides 3/16-sq balsa using Titebond masking tape strips hold wood place Pin framed sides plan build-up cabin structure wings incidence set cabin align 3/16-sq upper longeron carefully fit 3/16 X n uprights precisely balsa fuselage framing intended permit Zapping cross pieces place fuselage boxedand may rounded relieve square look fuselage course 1/16 plywood forward fuselage doublers should contactcemented place before boxing fuselage making sure right- left handed fuselage side produced Note doublers reinforce cabin up rights right side doubler should cut 1 / 16 shorter its front edge left thus building proper amount right-thrust ood firewall butts against doublers assembled fuse lage Drill firewall appropriate 44 Model Aviation Construction Kraft-Hayes other engine mount add blind nuts its rear face same rectangular 3/16 ply land ing gear mounta Hailco landing gear P/N B 105-3 will bolted later Theres former fuse lage Its cut foam-core serves primarily point support rudder elevator pushrods Assemble fuse lage gluing four 3/16 X s pieces place cabin area Rather sizing cross pieces plan measure precision Three cross pieces 3 long strument panel two fuselage bot tom front rear cabin area fourth cross piece 3 long aft upper cabin top fuselage cabin front former 3/16 balsa sheet completes basic assembly process aft-wing 3/16-sq cross pieces may fitted after fuselage sides drawn together tail Titebonded gether i/i rudder hinge block added Epoxy ter-square triangu lar stock balsa reinforcers firewallfuselage joint after firewall epoxied place Trace area forward strument panel aft firewall plan-view onto foam-core cut out fuel tank platform Its position within nose depends engine youre using prototype model used OS 30 hummer Raise lower its position keep centerline fuel tank aligned needle valve its glued place strengthens fuse lage substantially Epoxy gear mount place foam-core rectangles form fuselage floor reinforce fuselage doublers triangular stock Bolt engine mount place bolt engine put prop 2-in spinner engine shaft after hanging /8 plywood nose ring around Tape ply wood ring spinner back-plate couple 1/16 ply temporary spacers place fill nose area balsa foam blocks gluing place After blocks dry pull engine its mount tack-glue upper lower fuselage fairing blocks place Precut upper block balsa foam fuel tank hatch separation sand whole nose fuselage fairing back plywood nose ring sanding blocks Microballoons resin will fill dings depressions resulting sanding process cowl sanded shape re move tank hatch hollow tank clearance Itll have cut out clear engine exhaust pipe muffler well needle valve Devise hatch hold-down prototype model used long 4-40 bolt screwed tapped hole top edge firewallthe rear edge hatch wide enough prevent its twisting Wing dowel ply doublers glued place well cabin gussets ply Right Assembled wing center section showing torque rod aileron actuating system Foam cores can substitutedand build faster Below Eye-catcher think youll agree Leading edge center section covered white Super Monokote center quarter-square under forward cabin former aft-wing stop squared fuselage epoxied proper position Nothing too exotic about Tutors tail feathers plans show hardwood spars /8 X 3/16 spruce both rudder stabilizer local hobby shop out wood substituted 3/16 X a prototype model Rudder stab ribs stripped 3/16 balsa sheet theyre /s wide glued 3/16 X ing continued page 94 January 1977 45 Servos lost space Note fuselage former being used hold servo ends elevator rudder pushrods gusseting cabin areas Only formerfoam core CL Navy Carrier/Perry continued page 32 some Profile Carrier models illegal also un safe Nats year large Perfect clip failed during pull-test sub jected 25-lb load well-known Carrier modeler name will mention lost Class II model year Perfect clip up line failed flight Ive seen similar accidents other events photograph accompanying column depicts Pylon brand line connec tors Sullivan clips come two sizes rated 80 lb 110 lb other type clip will use have made myself photo also shows wrapped line terminations thimbles recom mended rule book two-line con struction Wrapped lines stronger crimped terminations easier inspect possible damage also easy make set can made watching favorite TV show thimbles available Perfect sleeves crimped line ends Sullivan serving wire included Larger thimbles included free small package modeling hardware buy local hobby shop Dont take chance losing air plane engine possibly injuring spectator fellow modeler right first time dont have again Soapbox Department numerous proposals before CLCB require reward realistic Profile Carrier models would like very much see realistic models event have talked Carrier modelers agree problems however almost proposals principal concern existing models made obsolete rule change mandatory require ment scale outlines close re semblance would make existing models illegal Scale bonus points can used effectively points awarded few enough non-scale existing models automatically eliminated competition requirement 5% scale tolerance however would eliminate kit airplaneseven G-S Bearcat think good idea Review proposals thinking about would like solve problems Get ready cross proposals would like add realism Profile event Write CLCB represen tative tell him support opposition various proposals way better event through participation rules-making process No has right complain about rules has never taken time let CLCB representative know opinions Richard L Perry 5016 Angelita Ave. Dayton OH 45424 Tutor ide Vries continued page 45 trailing edges Triangular stock added aft fuselage serve widened stabilizer platform fin pro vide reinforced fin/stabilizer gluing joint prototype model bit wood inlet lower edge rudder commercial tailwheel assembly chosen would fit 3/16thick surface long 3/32 music wire tailwheel strut will work other tailwheel bracketsand hold eter tailwheel Extra rudder hinges four recommended assure good rudder action reliable tailwheel steering Nothing much left covering radio installation always-onerous details finishing model Add windshield front dowel glassed areas use 030 clear buytrate plastic windshield windows Epoxy wing hole-down dowels place Bolt engine landing gear place use 2 diame ter main wheels Most radios lostin cavernous fuselage Tutor Theres lots room swathe receiver batteries anti-vibration foam protective plastic baggies Use servo trays fuselage installation making sure theyre posi tioned no strain placed connecting wires wires aile ron servo Theres no problem balancing Tutor fact receiver 450-mah battery prototype model positioned aft servos against fuselage former balance point slightly forward wing spars Flying airfoil computer-plotted 9 Clark-Y section model slightlyheavy 4 pounds slightly-underpowered purpose tail-dragger Make sure models balanced main gear tailwheel track straight ahead Triple-check everything first-flight check-list fire er up Like high-winged models Tutor rudder airplanethe aile rons arent too effective hence sugges tion plans ailerons should extended full rib-bay side Theres lot rudder elevator area use gingerly until have feel effectiveness Remember Tutor designed react like scale model pattern ship takeoff wind above 10 knots Tutor will leap air par ticularly helper holds model run engine up maximum revs Fly rudder until its well up can check effect aile rons Landings made almostlevel attitude since thats way gear set Rudder elevator effective gliding speeds final approach may played almost down stalling speed So use Tutor build up flying time proficiency build precise beautiful complex examples model-building art Hall Fame/i 976 continued page 54 Plans 80 different Ehling designed planes have published model ing magazines through years original designs have kitted Jetco Jasco Scientific Polks designs have won great number contests have responsible starting new trends model plane design Since Franks models designed newer young er modelers mind simple fool proof yet always maintained high level per form ance As result model designs instru mental attracting young people aeromodeling field Ebling has always innovator early competitor expertise recognizing loop holes rules has contributed success Technical Director Academy Model Aeronautics 20s competition rules much simpler today Intended new compressed-air model motors rules stated power may used famous story has contest Frank waited until other fliers turn called timer plane tiny thought too small successfuland string attached ran cigar box Ehling launched ship offi cial flight opening box Out flew pigeon pulling model aloft 00S max Franks crowning achievement Delta Dart No single model design has done create good will good publicity model aviation well introduce young sters over world wonderful sport building flying model planes Hundreds thousands kits have produced date profit Ebling other personal satisfaction since donated design AMA model industry As Technical Director Academy Model Aeronautics also Advertising Manager AMAs monthly magazine Model Aviation Frank currently key figure national organization very much respect ed everyone model aviation industry abilities accomplishments Few men aeromodeling well known over world 94 Model Aviation COX ENGINES COX/SANWA R/C SYSTEMS AIRTRONICS KITS Send C complete catalog 1525 E Warner Ave Santa Ana CA 92702 HOBBIES
Edition: Model Aviation - 1977/01
Page Numbers: 41, 42, 43, 44, 45, 94
THERE ARE generally speaking two kinds RCers participate SportScale contests first competent flier builds scale kit can compete both events usual Pat tern/Scale contest other dedi cated scale nut would rather build flyand enters contests because six entrants five prizes stands good chance taking home some loot latter type satisfied keeps miniature airplane pieceand often leaves something desired stick-twiddler Tutor designed dedicated Stand-Off Scale Nutto let him obtain maintain flying proficiency counts rivets checks out exact color schemes builds beautifully-detailed replicas Its quickly-built relatively stable flying design has characteristics usual scale model Its tail-dragger because preponder ance scale models feature tailwheel Its high-winged monoplane because stable scale ships have configu ration has cabin concession semi-realism can built about three weeks evenings couple week endsbecause no true scale builder will want dawdle over construction mere trainer has inset ailerons since few real airplanes have strip ailerons Finally model comfortably mid-sized may flown 25- 35-size engine yet its 46-in wing itll fit cars assembled have choice underpower bit itll probably respond like scale model Incidentally name Tutor indicates training model raised Nth Power isnt intended model abso lute RC beginner Rather requires flying building abilities modeler two three successful RC birds under belt turn page Top Transparent Solarfilm shows off whats inside prototype sniffs clear Colorado air Tutorn builds fastwas ready flight less two months after designers pencil first touched paper way go scratchbuilt modelspre kit Bits pieces ready assembly Fuel tank platform rests 1/16 plywood fuselage doublers Fuselage sides foam core framed 3/16 sq balsa strips January 1977 41 TUTOR LE 5/16 SQ BALSAN. I- ----i--l— - - -i I---H---__ii II ~jIII TIFI ___IIij-Ht~mii1 I-i_______ IIII4II L1L~jj~iL STOP B BOTTOM WEBBINGWING I/8X3/8JOINERADJU TO SUI SERV TE 7/16X 1/4 BALSA J TYPICAL TIP SECTION AILERON EJ1 RIB 4 REQ 1/8 BALSA AILERON RB 6 REQ I/B SHEET BALSA Ii -II-- MAIJ RIB 10 REQ I/8SHEET BALSA ROOT RIB 4 REQ 1/8 SHEET BALSA -I T DOWEL K DIHEE -WiNG JOINER 1/8 PLYWOOD -V FOAM CORE TENFLATE REDUCE THICKNESS TO SUIT COVERHG -It - ft RIB 2 REQ 1/8 SHEET BALSA 4i F IL -SCRAP BLOCK1/16 PLYWOOO GUSSET SHEETPAIRING ______ BALSA.B SECTION AT COWLWING PLATFORMBALANCEj TANK HATCH SPLITI/8DOWELI030 CLEAR COWL-HATCH 10 34X4X 5/83/8 TRIANGLEBUTYRATE BALSA OR FOAM STOCK GUSSETTO HERE 2SPINNER--3/16 X 1/2 BALSA KRAFT4-X FUEL TANK_____ AAII _____ El NII IIII------_ II -I -IJI S--II II1 Iii CEr —ITANK PLATFORMNII II II 3/16FOAM CORE N FILL WITH SCRAP-OR SHEET BALSAII BALSA I I II Nil OIL DRAIN HOLEI1N ________ I HALCO LG RETAIN WITH1/2 TRIANGLE STOCK 6-32HARDWARE3/16 PLYWOOD 0 I/ IFILL IN FUSELAGE BOTTOMINDICA o vi FROM FORMER FORWARDDOUBI NOSE RING WALLINDICATE I/B PLYWOODI/4PLY WOOD2 1/2 WHEELSFCM CO _____SHEET F 11 I TIPS BALSA BLOCK IJIJL II t41-i-i--- ___II-t121____ II II III 11 ___________________ ii jI1 k-a1k-U-jViiII-4 U-Iwzri4IHc ___II -- I.jJIj~Urzz7 IL __n- PNIING -s x 3/8 LE AILERON TORQUE ROD 1/8NYROD MUSIC WIEOUTER FOR MORE POSITIVE AILERON ACTION EAK iINCREASE AILERON AREA INBOARD PLYWOOD .j.. 6 3/16 SHEET - ------3A&XI/2 A CROSSPIECES 3/16 SQ BALSA APPROX WINDSHIELD PATTERN CUT FROM 030 CLEAR BUTYRATE BALSA IG STOP INSERT FRONT WING HOLD DOWN DOWEL AFTER WINDSHIELD S WINDOWS 1 ARE GLUED IN PLACE 1/16 PLYWOOD 3/8 TRIANGLE/ /3/16 STOCK/1/SHEET LIGHTENING HOLES TAIL WHEEL BRACKET LONGERONS & FRAME 3/16 SQ BALSABONNER DUBRO ETC 3/I6X3 BALSA TYP ___________X 3/16 BALSA ltI/8 -J 3/16 SHEET TAILWHEEL 3/4 PERFECT 1/8 X 3/1616 SPRUCE DESIGNED & DRAWN BY JOHN DE VRIES TRACED FOR MOOEL AVIATION BY RAY BORDEN 0I23456 /1/ ii ALSA LINE OD IE OF 3/16 LSA SIDES AFT FORMER 3/I6FOAM CORE OR BALSA choose go foam wing route Tutor builds super-fast plans show ribs both foam built-up wings show foam wing template full-sizedwithout allowance cov ering planking Thin extent re quired material intend use 1/16 sheet balsa plywood veneer card Inlet /8 plywood spar joiner center-section strength foam wing dont forget groove foam cores aileron torque rods before cover Aileron spars sheet balsa should Titebonded place give hinges attachment area chose make built-up wing prototype model requires 22 ribs cut sheet balsa Just looks cut five lightening holes rib cause knew handiwork should visible through transparent Solarfilm intended covering material ribs still stacked torque-rod holes drilled through Spars /t X 3A balsa leading edge 5/16-sq balsa ribs inlet /t Front-end view showing 1/B ply nose ring Contours faired boxy-shaped fuselage Upper cowl Cut away provide Clear ance muffler needle valve standard Sig 1 /4 trailing-edge stock Note built-up wing rib pattern calls 1/16 sheeting leading edge aft spars ailerons course built part wing cut loose later Wing tips either type wing may carved balsa blocks laminated balsa sheet foam blocks Dihedral 1 tip rib above flat center section wing panel Add aileron torque rods after wing assembled length outer Nyrod acts fulllength torque rod bearing Vt music wire actuating rod Strip-aileron-type hardware ties torque rod servo -provides slop-free aileron action course can use bellcranks aileron movement prefer Before leave finished uncovered wing plans show 1/16 balsa webbing between spars ribs Add super-strong wing fuselage constructed 3/16 foam-core framed 3/16-sq balsa can completely built about three hours using Titebond hold balsa foam-core Zap balsa-to-balsa joints Warn ing Keep Zap Hot Stuff away foam foam-core-it melts foam Cut fuselage sides foam-core material consists two layers card surrounding closed-foam layer Its Tutor The stabilizer ready covering pro totype model used transparent red Solar-film Tutor n purposely given charac teristics usual scale modelhence makes good trainer scale fans Below Sanded hinged fin/rudder has triangular stock added fins base providing strong gluing Lower hinge keyed place rudder horns mounting holes usually available well-stocked lumber yards its sold insulating board Foam-core fantastic modeling material 8-in-deep fuselage sides cost 60 pair compared $560 balsa used cut aftwing lightening holes its lighter Ecuador gold Frame cut-out sides 3/16-sq balsa using Titebond masking tape strips hold wood place Pin framed sides plan build-up cabin structure wings incidence set cabin align 3/16-sq upper longeron carefully fit 3/16 X n uprights precisely balsa fuselage framing intended permit Zapping cross pieces place fuselage boxedand may rounded relieve square look fuselage course 1/16 plywood forward fuselage doublers should contactcemented place before boxing fuselage making sure right- left handed fuselage side produced Note doublers reinforce cabin up rights right side doubler should cut 1 / 16 shorter its front edge left thus building proper amount right-thrust ood firewall butts against doublers assembled fuse lage Drill firewall appropriate 44 Model Aviation Construction Kraft-Hayes other engine mount add blind nuts its rear face same rectangular 3/16 ply land ing gear mounta Hailco landing gear P/N B 105-3 will bolted later Theres former fuse lage Its cut foam-core serves primarily point support rudder elevator pushrods Assemble fuse lage gluing four 3/16 X s pieces place cabin area Rather sizing cross pieces plan measure precision Three cross pieces 3 long strument panel two fuselage bot tom front rear cabin area fourth cross piece 3 long aft upper cabin top fuselage cabin front former 3/16 balsa sheet completes basic assembly process aft-wing 3/16-sq cross pieces may fitted after fuselage sides drawn together tail Titebonded gether i/i rudder hinge block added Epoxy ter-square triangu lar stock balsa reinforcers firewallfuselage joint after firewall epoxied place Trace area forward strument panel aft firewall plan-view onto foam-core cut out fuel tank platform Its position within nose depends engine youre using prototype model used OS 30 hummer Raise lower its position keep centerline fuel tank aligned needle valve its glued place strengthens fuse lage substantially Epoxy gear mount place foam-core rectangles form fuselage floor reinforce fuselage doublers triangular stock Bolt engine mount place bolt engine put prop 2-in spinner engine shaft after hanging /8 plywood nose ring around Tape ply wood ring spinner back-plate couple 1/16 ply temporary spacers place fill nose area balsa foam blocks gluing place After blocks dry pull engine its mount tack-glue upper lower fuselage fairing blocks place Precut upper block balsa foam fuel tank hatch separation sand whole nose fuselage fairing back plywood nose ring sanding blocks Microballoons resin will fill dings depressions resulting sanding process cowl sanded shape re move tank hatch hollow tank clearance Itll have cut out clear engine exhaust pipe muffler well needle valve Devise hatch hold-down prototype model used long 4-40 bolt screwed tapped hole top edge firewallthe rear edge hatch wide enough prevent its twisting Wing dowel ply doublers glued place well cabin gussets ply Right Assembled wing center section showing torque rod aileron actuating system Foam cores can substitutedand build faster Below Eye-catcher think youll agree Leading edge center section covered white Super Monokote center quarter-square under forward cabin former aft-wing stop squared fuselage epoxied proper position Nothing too exotic about Tutors tail feathers plans show hardwood spars /8 X 3/16 spruce both rudder stabilizer local hobby shop out wood substituted 3/16 X a prototype model Rudder stab ribs stripped 3/16 balsa sheet theyre /s wide glued 3/16 X ing continued page 94 January 1977 45 Servos lost space Note fuselage former being used hold servo ends elevator rudder pushrods gusseting cabin areas Only formerfoam core CL Navy Carrier/Perry continued page 32 some Profile Carrier models illegal also un safe Nats year large Perfect clip failed during pull-test sub jected 25-lb load well-known Carrier modeler name will mention lost Class II model year Perfect clip up line failed flight Ive seen similar accidents other events photograph accompanying column depicts Pylon brand line connec tors Sullivan clips come two sizes rated 80 lb 110 lb other type clip will use have made myself photo also shows wrapped line terminations thimbles recom mended rule book two-line con struction Wrapped lines stronger crimped terminations easier inspect possible damage also easy make set can made watching favorite TV show thimbles available Perfect sleeves crimped line ends Sullivan serving wire included Larger thimbles included free small package modeling hardware buy local hobby shop Dont take chance losing air plane engine possibly injuring spectator fellow modeler right first time dont have again Soapbox Department numerous proposals before CLCB require reward realistic Profile Carrier models would like very much see realistic models event have talked Carrier modelers agree problems however almost proposals principal concern existing models made obsolete rule change mandatory require ment scale outlines close re semblance would make existing models illegal Scale bonus points can used effectively points awarded few enough non-scale existing models automatically eliminated competition requirement 5% scale tolerance however would eliminate kit airplaneseven G-S Bearcat think good idea Review proposals thinking about would like solve problems Get ready cross proposals would like add realism Profile event Write CLCB represen tative tell him support opposition various proposals way better event through participation rules-making process No has right complain about rules has never taken time let CLCB representative know opinions Richard L Perry 5016 Angelita Ave. Dayton OH 45424 Tutor ide Vries continued page 45 trailing edges Triangular stock added aft fuselage serve widened stabilizer platform fin pro vide reinforced fin/stabilizer gluing joint prototype model bit wood inlet lower edge rudder commercial tailwheel assembly chosen would fit 3/16thick surface long 3/32 music wire tailwheel strut will work other tailwheel bracketsand hold eter tailwheel Extra rudder hinges four recommended assure good rudder action reliable tailwheel steering Nothing much left covering radio installation always-onerous details finishing model Add windshield front dowel glassed areas use 030 clear buytrate plastic windshield windows Epoxy wing hole-down dowels place Bolt engine landing gear place use 2 diame ter main wheels Most radios lostin cavernous fuselage Tutor Theres lots room swathe receiver batteries anti-vibration foam protective plastic baggies Use servo trays fuselage installation making sure theyre posi tioned no strain placed connecting wires wires aile ron servo Theres no problem balancing Tutor fact receiver 450-mah battery prototype model positioned aft servos against fuselage former balance point slightly forward wing spars Flying airfoil computer-plotted 9 Clark-Y section model slightlyheavy 4 pounds slightly-underpowered purpose tail-dragger Make sure models balanced main gear tailwheel track straight ahead Triple-check everything first-flight check-list fire er up Like high-winged models Tutor rudder airplanethe aile rons arent too effective hence sugges tion plans ailerons should extended full rib-bay side Theres lot rudder elevator area use gingerly until have feel effectiveness Remember Tutor designed react like scale model pattern ship takeoff wind above 10 knots Tutor will leap air par ticularly helper holds model run engine up maximum revs Fly rudder until its well up can check effect aile rons Landings made almostlevel attitude since thats way gear set Rudder elevator effective gliding speeds final approach may played almost down stalling speed So use Tutor build up flying time proficiency build precise beautiful complex examples model-building art Hall Fame/i 976 continued page 54 Plans 80 different Ehling designed planes have published model ing magazines through years original designs have kitted Jetco Jasco Scientific Polks designs have won great number contests have responsible starting new trends model plane design Since Franks models designed newer young er modelers mind simple fool proof yet always maintained high level per form ance As result model designs instru mental attracting young people aeromodeling field Ebling has always innovator early competitor expertise recognizing loop holes rules has contributed success Technical Director Academy Model Aeronautics 20s competition rules much simpler today Intended new compressed-air model motors rules stated power may used famous story has contest Frank waited until other fliers turn called timer plane tiny thought too small successfuland string attached ran cigar box Ehling launched ship offi cial flight opening box Out flew pigeon pulling model aloft 00S max Franks crowning achievement Delta Dart No single model design has done create good will good publicity model aviation well introduce young sters over world wonderful sport building flying model planes Hundreds thousands kits have produced date profit Ebling other personal satisfaction since donated design AMA model industry As Technical Director Academy Model Aeronautics also Advertising Manager AMAs monthly magazine Model Aviation Frank currently key figure national organization very much respect ed everyone model aviation industry abilities accomplishments Few men aeromodeling well known over world 94 Model Aviation COX ENGINES COX/SANWA R/C SYSTEMS AIRTRONICS KITS Send C complete catalog 1525 E Warner Ave Santa Ana CA 92702 HOBBIES
Edition: Model Aviation - 1977/01
Page Numbers: 41, 42, 43, 44, 45, 94
THERE ARE generally speaking two kinds RCers participate SportScale contests first competent flier builds scale kit can compete both events usual Pat tern/Scale contest other dedi cated scale nut would rather build flyand enters contests because six entrants five prizes stands good chance taking home some loot latter type satisfied keeps miniature airplane pieceand often leaves something desired stick-twiddler Tutor designed dedicated Stand-Off Scale Nutto let him obtain maintain flying proficiency counts rivets checks out exact color schemes builds beautifully-detailed replicas Its quickly-built relatively stable flying design has characteristics usual scale model Its tail-dragger because preponder ance scale models feature tailwheel Its high-winged monoplane because stable scale ships have configu ration has cabin concession semi-realism can built about three weeks evenings couple week endsbecause no true scale builder will want dawdle over construction mere trainer has inset ailerons since few real airplanes have strip ailerons Finally model comfortably mid-sized may flown 25- 35-size engine yet its 46-in wing itll fit cars assembled have choice underpower bit itll probably respond like scale model Incidentally name Tutor indicates training model raised Nth Power isnt intended model abso lute RC beginner Rather requires flying building abilities modeler two three successful RC birds under belt turn page Top Transparent Solarfilm shows off whats inside prototype sniffs clear Colorado air Tutorn builds fastwas ready flight less two months after designers pencil first touched paper way go scratchbuilt modelspre kit Bits pieces ready assembly Fuel tank platform rests 1/16 plywood fuselage doublers Fuselage sides foam core framed 3/16 sq balsa strips January 1977 41 TUTOR LE 5/16 SQ BALSAN. I- ----i--l— - - -i I---H---__ii II ~jIII TIFI ___IIij-Ht~mii1 I-i_______ IIII4II L1L~jj~iL STOP B BOTTOM WEBBINGWING I/8X3/8JOINERADJU TO SUI SERV TE 7/16X 1/4 BALSA J TYPICAL TIP SECTION AILERON EJ1 RIB 4 REQ 1/8 BALSA AILERON RB 6 REQ I/B SHEET BALSA Ii -II-- MAIJ RIB 10 REQ I/8SHEET BALSA ROOT RIB 4 REQ 1/8 SHEET BALSA -I T DOWEL K DIHEE -WiNG JOINER 1/8 PLYWOOD -V FOAM CORE TENFLATE REDUCE THICKNESS TO SUIT COVERHG -It - ft RIB 2 REQ 1/8 SHEET BALSA 4i F IL -SCRAP BLOCK1/16 PLYWOOO GUSSET SHEETPAIRING ______ BALSA.B SECTION AT COWLWING PLATFORMBALANCEj TANK HATCH SPLITI/8DOWELI030 CLEAR COWL-HATCH 10 34X4X 5/83/8 TRIANGLEBUTYRATE BALSA OR FOAM STOCK GUSSETTO HERE 2SPINNER--3/16 X 1/2 BALSA KRAFT4-X FUEL TANK_____ AAII _____ El NII IIII------_ II -I -IJI S--II II1 Iii CEr —ITANK PLATFORMNII II II 3/16FOAM CORE N FILL WITH SCRAP-OR SHEET BALSAII BALSA I I II Nil OIL DRAIN HOLEI1N ________ I HALCO LG RETAIN WITH1/2 TRIANGLE STOCK 6-32HARDWARE3/16 PLYWOOD 0 I/ IFILL IN FUSELAGE BOTTOMINDICA o vi FROM FORMER FORWARDDOUBI NOSE RING WALLINDICATE I/B PLYWOODI/4PLY WOOD2 1/2 WHEELSFCM CO _____SHEET F 11 I TIPS BALSA BLOCK IJIJL II t41-i-i--- ___II-t121____ II II III 11 ___________________ ii jI1 k-a1k-U-jViiII-4 U-Iwzri4IHc ___II -- I.jJIj~Urzz7 IL __n- PNIING -s x 3/8 LE AILERON TORQUE ROD 1/8NYROD MUSIC WIEOUTER FOR MORE POSITIVE AILERON ACTION EAK iINCREASE AILERON AREA INBOARD PLYWOOD .j.. 6 3/16 SHEET - ------3A&XI/2 A CROSSPIECES 3/16 SQ BALSA APPROX WINDSHIELD PATTERN CUT FROM 030 CLEAR BUTYRATE BALSA IG STOP INSERT FRONT WING HOLD DOWN DOWEL AFTER WINDSHIELD S WINDOWS 1 ARE GLUED IN PLACE 1/16 PLYWOOD 3/8 TRIANGLE/ /3/16 STOCK/1/SHEET LIGHTENING HOLES TAIL WHEEL BRACKET LONGERONS & FRAME 3/16 SQ BALSABONNER DUBRO ETC 3/I6X3 BALSA TYP ___________X 3/16 BALSA ltI/8 -J 3/16 SHEET TAILWHEEL 3/4 PERFECT 1/8 X 3/1616 SPRUCE DESIGNED & DRAWN BY JOHN DE VRIES TRACED FOR MOOEL AVIATION BY RAY BORDEN 0I23456 /1/ ii ALSA LINE OD IE OF 3/16 LSA SIDES AFT FORMER 3/I6FOAM CORE OR BALSA choose go foam wing route Tutor builds super-fast plans show ribs both foam built-up wings show foam wing template full-sizedwithout allowance cov ering planking Thin extent re quired material intend use 1/16 sheet balsa plywood veneer card Inlet /8 plywood spar joiner center-section strength foam wing dont forget groove foam cores aileron torque rods before cover Aileron spars sheet balsa should Titebonded place give hinges attachment area chose make built-up wing prototype model requires 22 ribs cut sheet balsa Just looks cut five lightening holes rib cause knew handiwork should visible through transparent Solarfilm intended covering material ribs still stacked torque-rod holes drilled through Spars /t X 3A balsa leading edge 5/16-sq balsa ribs inlet /t Front-end view showing 1/B ply nose ring Contours faired boxy-shaped fuselage Upper cowl Cut away provide Clear ance muffler needle valve standard Sig 1 /4 trailing-edge stock Note built-up wing rib pattern calls 1/16 sheeting leading edge aft spars ailerons course built part wing cut loose later Wing tips either type wing may carved balsa blocks laminated balsa sheet foam blocks Dihedral 1 tip rib above flat center section wing panel Add aileron torque rods after wing assembled length outer Nyrod acts fulllength torque rod bearing Vt music wire actuating rod Strip-aileron-type hardware ties torque rod servo -provides slop-free aileron action course can use bellcranks aileron movement prefer Before leave finished uncovered wing plans show 1/16 balsa webbing between spars ribs Add super-strong wing fuselage constructed 3/16 foam-core framed 3/16-sq balsa can completely built about three hours using Titebond hold balsa foam-core Zap balsa-to-balsa joints Warn ing Keep Zap Hot Stuff away foam foam-core-it melts foam Cut fuselage sides foam-core material consists two layers card surrounding closed-foam layer Its Tutor The stabilizer ready covering pro totype model used transparent red Solar-film Tutor n purposely given charac teristics usual scale modelhence makes good trainer scale fans Below Sanded hinged fin/rudder has triangular stock added fins base providing strong gluing Lower hinge keyed place rudder horns mounting holes usually available well-stocked lumber yards its sold insulating board Foam-core fantastic modeling material 8-in-deep fuselage sides cost 60 pair compared $560 balsa used cut aftwing lightening holes its lighter Ecuador gold Frame cut-out sides 3/16-sq balsa using Titebond masking tape strips hold wood place Pin framed sides plan build-up cabin structure wings incidence set cabin align 3/16-sq upper longeron carefully fit 3/16 X n uprights precisely balsa fuselage framing intended permit Zapping cross pieces place fuselage boxedand may rounded relieve square look fuselage course 1/16 plywood forward fuselage doublers should contactcemented place before boxing fuselage making sure right- left handed fuselage side produced Note doublers reinforce cabin up rights right side doubler should cut 1 / 16 shorter its front edge left thus building proper amount right-thrust ood firewall butts against doublers assembled fuse lage Drill firewall appropriate 44 Model Aviation Construction Kraft-Hayes other engine mount add blind nuts its rear face same rectangular 3/16 ply land ing gear mounta Hailco landing gear P/N B 105-3 will bolted later Theres former fuse lage Its cut foam-core serves primarily point support rudder elevator pushrods Assemble fuse lage gluing four 3/16 X s pieces place cabin area Rather sizing cross pieces plan measure precision Three cross pieces 3 long strument panel two fuselage bot tom front rear cabin area fourth cross piece 3 long aft upper cabin top fuselage cabin front former 3/16 balsa sheet completes basic assembly process aft-wing 3/16-sq cross pieces may fitted after fuselage sides drawn together tail Titebonded gether i/i rudder hinge block added Epoxy ter-square triangu lar stock balsa reinforcers firewallfuselage joint after firewall epoxied place Trace area forward strument panel aft firewall plan-view onto foam-core cut out fuel tank platform Its position within nose depends engine youre using prototype model used OS 30 hummer Raise lower its position keep centerline fuel tank aligned needle valve its glued place strengthens fuse lage substantially Epoxy gear mount place foam-core rectangles form fuselage floor reinforce fuselage doublers triangular stock Bolt engine mount place bolt engine put prop 2-in spinner engine shaft after hanging /8 plywood nose ring around Tape ply wood ring spinner back-plate couple 1/16 ply temporary spacers place fill nose area balsa foam blocks gluing place After blocks dry pull engine its mount tack-glue upper lower fuselage fairing blocks place Precut upper block balsa foam fuel tank hatch separation sand whole nose fuselage fairing back plywood nose ring sanding blocks Microballoons resin will fill dings depressions resulting sanding process cowl sanded shape re move tank hatch hollow tank clearance Itll have cut out clear engine exhaust pipe muffler well needle valve Devise hatch hold-down prototype model used long 4-40 bolt screwed tapped hole top edge firewallthe rear edge hatch wide enough prevent its twisting Wing dowel ply doublers glued place well cabin gussets ply Right Assembled wing center section showing torque rod aileron actuating system Foam cores can substitutedand build faster Below Eye-catcher think youll agree Leading edge center section covered white Super Monokote center quarter-square under forward cabin former aft-wing stop squared fuselage epoxied proper position Nothing too exotic about Tutors tail feathers plans show hardwood spars /8 X 3/16 spruce both rudder stabilizer local hobby shop out wood substituted 3/16 X a prototype model Rudder stab ribs stripped 3/16 balsa sheet theyre /s wide glued 3/16 X ing continued page 94 January 1977 45 Servos lost space Note fuselage former being used hold servo ends elevator rudder pushrods gusseting cabin areas Only formerfoam core CL Navy Carrier/Perry continued page 32 some Profile Carrier models illegal also un safe Nats year large Perfect clip failed during pull-test sub jected 25-lb load well-known Carrier modeler name will mention lost Class II model year Perfect clip up line failed flight Ive seen similar accidents other events photograph accompanying column depicts Pylon brand line connec tors Sullivan clips come two sizes rated 80 lb 110 lb other type clip will use have made myself photo also shows wrapped line terminations thimbles recom mended rule book two-line con struction Wrapped lines stronger crimped terminations easier inspect possible damage also easy make set can made watching favorite TV show thimbles available Perfect sleeves crimped line ends Sullivan serving wire included Larger thimbles included free small package modeling hardware buy local hobby shop Dont take chance losing air plane engine possibly injuring spectator fellow modeler right first time dont have again Soapbox Department numerous proposals before CLCB require reward realistic Profile Carrier models would like very much see realistic models event have talked Carrier modelers agree problems however almost proposals principal concern existing models made obsolete rule change mandatory require ment scale outlines close re semblance would make existing models illegal Scale bonus points can used effectively points awarded few enough non-scale existing models automatically eliminated competition requirement 5% scale tolerance however would eliminate kit airplaneseven G-S Bearcat think good idea Review proposals thinking about would like solve problems Get ready cross proposals would like add realism Profile event Write CLCB represen tative tell him support opposition various proposals way better event through participation rules-making process No has right complain about rules has never taken time let CLCB representative know opinions Richard L Perry 5016 Angelita Ave. Dayton OH 45424 Tutor ide Vries continued page 45 trailing edges Triangular stock added aft fuselage serve widened stabilizer platform fin pro vide reinforced fin/stabilizer gluing joint prototype model bit wood inlet lower edge rudder commercial tailwheel assembly chosen would fit 3/16thick surface long 3/32 music wire tailwheel strut will work other tailwheel bracketsand hold eter tailwheel Extra rudder hinges four recommended assure good rudder action reliable tailwheel steering Nothing much left covering radio installation always-onerous details finishing model Add windshield front dowel glassed areas use 030 clear buytrate plastic windshield windows Epoxy wing hole-down dowels place Bolt engine landing gear place use 2 diame ter main wheels Most radios lostin cavernous fuselage Tutor Theres lots room swathe receiver batteries anti-vibration foam protective plastic baggies Use servo trays fuselage installation making sure theyre posi tioned no strain placed connecting wires wires aile ron servo Theres no problem balancing Tutor fact receiver 450-mah battery prototype model positioned aft servos against fuselage former balance point slightly forward wing spars Flying airfoil computer-plotted 9 Clark-Y section model slightlyheavy 4 pounds slightly-underpowered purpose tail-dragger Make sure models balanced main gear tailwheel track straight ahead Triple-check everything first-flight check-list fire er up Like high-winged models Tutor rudder airplanethe aile rons arent too effective hence sugges tion plans ailerons should extended full rib-bay side Theres lot rudder elevator area use gingerly until have feel effectiveness Remember Tutor designed react like scale model pattern ship takeoff wind above 10 knots Tutor will leap air par ticularly helper holds model run engine up maximum revs Fly rudder until its well up can check effect aile rons Landings made almostlevel attitude since thats way gear set Rudder elevator effective gliding speeds final approach may played almost down stalling speed So use Tutor build up flying time proficiency build precise beautiful complex examples model-building art Hall Fame/i 976 continued page 54 Plans 80 different Ehling designed planes have published model ing magazines through years original designs have kitted Jetco Jasco Scientific Polks designs have won great number contests have responsible starting new trends model plane design Since Franks models designed newer young er modelers mind simple fool proof yet always maintained high level per form ance As result model designs instru mental attracting young people aeromodeling field Ebling has always innovator early competitor expertise recognizing loop holes rules has contributed success Technical Director Academy Model Aeronautics 20s competition rules much simpler today Intended new compressed-air model motors rules stated power may used famous story has contest Frank waited until other fliers turn called timer plane tiny thought too small successfuland string attached ran cigar box Ehling launched ship offi cial flight opening box Out flew pigeon pulling model aloft 00S max Franks crowning achievement Delta Dart No single model design has done create good will good publicity model aviation well introduce young sters over world wonderful sport building flying model planes Hundreds thousands kits have produced date profit Ebling other personal satisfaction since donated design AMA model industry As Technical Director Academy Model Aeronautics also Advertising Manager AMAs monthly magazine Model Aviation Frank currently key figure national organization very much respect ed everyone model aviation industry abilities accomplishments Few men aeromodeling well known over world 94 Model Aviation COX ENGINES COX/SANWA R/C SYSTEMS AIRTRONICS KITS Send C complete catalog 1525 E Warner Ave Santa Ana CA 92702 HOBBIES
Edition: Model Aviation - 1977/01
Page Numbers: 41, 42, 43, 44, 45, 94
THERE ARE generally speaking two kinds RCers participate SportScale contests first competent flier builds scale kit can compete both events usual Pat tern/Scale contest other dedi cated scale nut would rather build flyand enters contests because six entrants five prizes stands good chance taking home some loot latter type satisfied keeps miniature airplane pieceand often leaves something desired stick-twiddler Tutor designed dedicated Stand-Off Scale Nutto let him obtain maintain flying proficiency counts rivets checks out exact color schemes builds beautifully-detailed replicas Its quickly-built relatively stable flying design has characteristics usual scale model Its tail-dragger because preponder ance scale models feature tailwheel Its high-winged monoplane because stable scale ships have configu ration has cabin concession semi-realism can built about three weeks evenings couple week endsbecause no true scale builder will want dawdle over construction mere trainer has inset ailerons since few real airplanes have strip ailerons Finally model comfortably mid-sized may flown 25- 35-size engine yet its 46-in wing itll fit cars assembled have choice underpower bit itll probably respond like scale model Incidentally name Tutor indicates training model raised Nth Power isnt intended model abso lute RC beginner Rather requires flying building abilities modeler two three successful RC birds under belt turn page Top Transparent Solarfilm shows off whats inside prototype sniffs clear Colorado air Tutorn builds fastwas ready flight less two months after designers pencil first touched paper way go scratchbuilt modelspre kit Bits pieces ready assembly Fuel tank platform rests 1/16 plywood fuselage doublers Fuselage sides foam core framed 3/16 sq balsa strips January 1977 41 TUTOR LE 5/16 SQ BALSAN. I- ----i--l— - - -i I---H---__ii II ~jIII TIFI ___IIij-Ht~mii1 I-i_______ IIII4II L1L~jj~iL STOP B BOTTOM WEBBINGWING I/8X3/8JOINERADJU TO SUI SERV TE 7/16X 1/4 BALSA J TYPICAL TIP SECTION AILERON EJ1 RIB 4 REQ 1/8 BALSA AILERON RB 6 REQ I/B SHEET BALSA Ii -II-- MAIJ RIB 10 REQ I/8SHEET BALSA ROOT RIB 4 REQ 1/8 SHEET BALSA -I T DOWEL K DIHEE -WiNG JOINER 1/8 PLYWOOD -V FOAM CORE TENFLATE REDUCE THICKNESS TO SUIT COVERHG -It - ft RIB 2 REQ 1/8 SHEET BALSA 4i F IL -SCRAP BLOCK1/16 PLYWOOO GUSSET SHEETPAIRING ______ BALSA.B SECTION AT COWLWING PLATFORMBALANCEj TANK HATCH SPLITI/8DOWELI030 CLEAR COWL-HATCH 10 34X4X 5/83/8 TRIANGLEBUTYRATE BALSA OR FOAM STOCK GUSSETTO HERE 2SPINNER--3/16 X 1/2 BALSA KRAFT4-X FUEL TANK_____ AAII _____ El NII IIII------_ II -I -IJI S--II II1 Iii CEr —ITANK PLATFORMNII II II 3/16FOAM CORE N FILL WITH SCRAP-OR SHEET BALSAII BALSA I I II Nil OIL DRAIN HOLEI1N ________ I HALCO LG RETAIN WITH1/2 TRIANGLE STOCK 6-32HARDWARE3/16 PLYWOOD 0 I/ IFILL IN FUSELAGE BOTTOMINDICA o vi FROM FORMER FORWARDDOUBI NOSE RING WALLINDICATE I/B PLYWOODI/4PLY WOOD2 1/2 WHEELSFCM CO _____SHEET F 11 I TIPS BALSA BLOCK IJIJL II t41-i-i--- ___II-t121____ II II III 11 ___________________ ii jI1 k-a1k-U-jViiII-4 U-Iwzri4IHc ___II -- I.jJIj~Urzz7 IL __n- PNIING -s x 3/8 LE AILERON TORQUE ROD 1/8NYROD MUSIC WIEOUTER FOR MORE POSITIVE AILERON ACTION EAK iINCREASE AILERON AREA INBOARD PLYWOOD .j.. 6 3/16 SHEET - ------3A&XI/2 A CROSSPIECES 3/16 SQ BALSA APPROX WINDSHIELD PATTERN CUT FROM 030 CLEAR BUTYRATE BALSA IG STOP INSERT FRONT WING HOLD DOWN DOWEL AFTER WINDSHIELD S WINDOWS 1 ARE GLUED IN PLACE 1/16 PLYWOOD 3/8 TRIANGLE/ /3/16 STOCK/1/SHEET LIGHTENING HOLES TAIL WHEEL BRACKET LONGERONS & FRAME 3/16 SQ BALSABONNER DUBRO ETC 3/I6X3 BALSA TYP ___________X 3/16 BALSA ltI/8 -J 3/16 SHEET TAILWHEEL 3/4 PERFECT 1/8 X 3/1616 SPRUCE DESIGNED & DRAWN BY JOHN DE VRIES TRACED FOR MOOEL AVIATION BY RAY BORDEN 0I23456 /1/ ii ALSA LINE OD IE OF 3/16 LSA SIDES AFT FORMER 3/I6FOAM CORE OR BALSA choose go foam wing route Tutor builds super-fast plans show ribs both foam built-up wings show foam wing template full-sizedwithout allowance cov ering planking Thin extent re quired material intend use 1/16 sheet balsa plywood veneer card Inlet /8 plywood spar joiner center-section strength foam wing dont forget groove foam cores aileron torque rods before cover Aileron spars sheet balsa should Titebonded place give hinges attachment area chose make built-up wing prototype model requires 22 ribs cut sheet balsa Just looks cut five lightening holes rib cause knew handiwork should visible through transparent Solarfilm intended covering material ribs still stacked torque-rod holes drilled through Spars /t X 3A balsa leading edge 5/16-sq balsa ribs inlet /t Front-end view showing 1/B ply nose ring Contours faired boxy-shaped fuselage Upper cowl Cut away provide Clear ance muffler needle valve standard Sig 1 /4 trailing-edge stock Note built-up wing rib pattern calls 1/16 sheeting leading edge aft spars ailerons course built part wing cut loose later Wing tips either type wing may carved balsa blocks laminated balsa sheet foam blocks Dihedral 1 tip rib above flat center section wing panel Add aileron torque rods after wing assembled length outer Nyrod acts fulllength torque rod bearing Vt music wire actuating rod Strip-aileron-type hardware ties torque rod servo -provides slop-free aileron action course can use bellcranks aileron movement prefer Before leave finished uncovered wing plans show 1/16 balsa webbing between spars ribs Add super-strong wing fuselage constructed 3/16 foam-core framed 3/16-sq balsa can completely built about three hours using Titebond hold balsa foam-core Zap balsa-to-balsa joints Warn ing Keep Zap Hot Stuff away foam foam-core-it melts foam Cut fuselage sides foam-core material consists two layers card surrounding closed-foam layer Its Tutor The stabilizer ready covering pro totype model used transparent red Solar-film Tutor n purposely given charac teristics usual scale modelhence makes good trainer scale fans Below Sanded hinged fin/rudder has triangular stock added fins base providing strong gluing Lower hinge keyed place rudder horns mounting holes usually available well-stocked lumber yards its sold insulating board Foam-core fantastic modeling material 8-in-deep fuselage sides cost 60 pair compared $560 balsa used cut aftwing lightening holes its lighter Ecuador gold Frame cut-out sides 3/16-sq balsa using Titebond masking tape strips hold wood place Pin framed sides plan build-up cabin structure wings incidence set cabin align 3/16-sq upper longeron carefully fit 3/16 X n uprights precisely balsa fuselage framing intended permit Zapping cross pieces place fuselage boxedand may rounded relieve square look fuselage course 1/16 plywood forward fuselage doublers should contactcemented place before boxing fuselage making sure right- left handed fuselage side produced Note doublers reinforce cabin up rights right side doubler should cut 1 / 16 shorter its front edge left thus building proper amount right-thrust ood firewall butts against doublers assembled fuse lage Drill firewall appropriate 44 Model Aviation Construction Kraft-Hayes other engine mount add blind nuts its rear face same rectangular 3/16 ply land ing gear mounta Hailco landing gear P/N B 105-3 will bolted later Theres former fuse lage Its cut foam-core serves primarily point support rudder elevator pushrods Assemble fuse lage gluing four 3/16 X s pieces place cabin area Rather sizing cross pieces plan measure precision Three cross pieces 3 long strument panel two fuselage bot tom front rear cabin area fourth cross piece 3 long aft upper cabin top fuselage cabin front former 3/16 balsa sheet completes basic assembly process aft-wing 3/16-sq cross pieces may fitted after fuselage sides drawn together tail Titebonded gether i/i rudder hinge block added Epoxy ter-square triangu lar stock balsa reinforcers firewallfuselage joint after firewall epoxied place Trace area forward strument panel aft firewall plan-view onto foam-core cut out fuel tank platform Its position within nose depends engine youre using prototype model used OS 30 hummer Raise lower its position keep centerline fuel tank aligned needle valve its glued place strengthens fuse lage substantially Epoxy gear mount place foam-core rectangles form fuselage floor reinforce fuselage doublers triangular stock Bolt engine mount place bolt engine put prop 2-in spinner engine shaft after hanging /8 plywood nose ring around Tape ply wood ring spinner back-plate couple 1/16 ply temporary spacers place fill nose area balsa foam blocks gluing place After blocks dry pull engine its mount tack-glue upper lower fuselage fairing blocks place Precut upper block balsa foam fuel tank hatch separation sand whole nose fuselage fairing back plywood nose ring sanding blocks Microballoons resin will fill dings depressions resulting sanding process cowl sanded shape re move tank hatch hollow tank clearance Itll have cut out clear engine exhaust pipe muffler well needle valve Devise hatch hold-down prototype model used long 4-40 bolt screwed tapped hole top edge firewallthe rear edge hatch wide enough prevent its twisting Wing dowel ply doublers glued place well cabin gussets ply Right Assembled wing center section showing torque rod aileron actuating system Foam cores can substitutedand build faster Below Eye-catcher think youll agree Leading edge center section covered white Super Monokote center quarter-square under forward cabin former aft-wing stop squared fuselage epoxied proper position Nothing too exotic about Tutors tail feathers plans show hardwood spars /8 X 3/16 spruce both rudder stabilizer local hobby shop out wood substituted 3/16 X a prototype model Rudder stab ribs stripped 3/16 balsa sheet theyre /s wide glued 3/16 X ing continued page 94 January 1977 45 Servos lost space Note fuselage former being used hold servo ends elevator rudder pushrods gusseting cabin areas Only formerfoam core CL Navy Carrier/Perry continued page 32 some Profile Carrier models illegal also un safe Nats year large Perfect clip failed during pull-test sub jected 25-lb load well-known Carrier modeler name will mention lost Class II model year Perfect clip up line failed flight Ive seen similar accidents other events photograph accompanying column depicts Pylon brand line connec tors Sullivan clips come two sizes rated 80 lb 110 lb other type clip will use have made myself photo also shows wrapped line terminations thimbles recom mended rule book two-line con struction Wrapped lines stronger crimped terminations easier inspect possible damage also easy make set can made watching favorite TV show thimbles available Perfect sleeves crimped line ends Sullivan serving wire included Larger thimbles included free small package modeling hardware buy local hobby shop Dont take chance losing air plane engine possibly injuring spectator fellow modeler right first time dont have again Soapbox Department numerous proposals before CLCB require reward realistic Profile Carrier models would like very much see realistic models event have talked Carrier modelers agree problems however almost proposals principal concern existing models made obsolete rule change mandatory require ment scale outlines close re semblance would make existing models illegal Scale bonus points can used effectively points awarded few enough non-scale existing models automatically eliminated competition requirement 5% scale tolerance however would eliminate kit airplaneseven G-S Bearcat think good idea Review proposals thinking about would like solve problems Get ready cross proposals would like add realism Profile event Write CLCB represen tative tell him support opposition various proposals way better event through participation rules-making process No has right complain about rules has never taken time let CLCB representative know opinions Richard L Perry 5016 Angelita Ave. Dayton OH 45424 Tutor ide Vries continued page 45 trailing edges Triangular stock added aft fuselage serve widened stabilizer platform fin pro vide reinforced fin/stabilizer gluing joint prototype model bit wood inlet lower edge rudder commercial tailwheel assembly chosen would fit 3/16thick surface long 3/32 music wire tailwheel strut will work other tailwheel bracketsand hold eter tailwheel Extra rudder hinges four recommended assure good rudder action reliable tailwheel steering Nothing much left covering radio installation always-onerous details finishing model Add windshield front dowel glassed areas use 030 clear buytrate plastic windshield windows Epoxy wing hole-down dowels place Bolt engine landing gear place use 2 diame ter main wheels Most radios lostin cavernous fuselage Tutor Theres lots room swathe receiver batteries anti-vibration foam protective plastic baggies Use servo trays fuselage installation making sure theyre posi tioned no strain placed connecting wires wires aile ron servo Theres no problem balancing Tutor fact receiver 450-mah battery prototype model positioned aft servos against fuselage former balance point slightly forward wing spars Flying airfoil computer-plotted 9 Clark-Y section model slightlyheavy 4 pounds slightly-underpowered purpose tail-dragger Make sure models balanced main gear tailwheel track straight ahead Triple-check everything first-flight check-list fire er up Like high-winged models Tutor rudder airplanethe aile rons arent too effective hence sugges tion plans ailerons should extended full rib-bay side Theres lot rudder elevator area use gingerly until have feel effectiveness Remember Tutor designed react like scale model pattern ship takeoff wind above 10 knots Tutor will leap air par ticularly helper holds model run engine up maximum revs Fly rudder until its well up can check effect aile rons Landings made almostlevel attitude since thats way gear set Rudder elevator effective gliding speeds final approach may played almost down stalling speed So use Tutor build up flying time proficiency build precise beautiful complex examples model-building art Hall Fame/i 976 continued page 54 Plans 80 different Ehling designed planes have published model ing magazines through years original designs have kitted Jetco Jasco Scientific Polks designs have won great number contests have responsible starting new trends model plane design Since Franks models designed newer young er modelers mind simple fool proof yet always maintained high level per form ance As result model designs instru mental attracting young people aeromodeling field Ebling has always innovator early competitor expertise recognizing loop holes rules has contributed success Technical Director Academy Model Aeronautics 20s competition rules much simpler today Intended new compressed-air model motors rules stated power may used famous story has contest Frank waited until other fliers turn called timer plane tiny thought too small successfuland string attached ran cigar box Ehling launched ship offi cial flight opening box Out flew pigeon pulling model aloft 00S max Franks crowning achievement Delta Dart No single model design has done create good will good publicity model aviation well introduce young sters over world wonderful sport building flying model planes Hundreds thousands kits have produced date profit Ebling other personal satisfaction since donated design AMA model industry As Technical Director Academy Model Aeronautics also Advertising Manager AMAs monthly magazine Model Aviation Frank currently key figure national organization very much respect ed everyone model aviation industry abilities accomplishments Few men aeromodeling well known over world 94 Model Aviation COX ENGINES COX/SANWA R/C SYSTEMS AIRTRONICS KITS Send C complete catalog 1525 E Warner Ave Santa Ana CA 92702 HOBBIES