Clarence Haught DEDflZNGE~ IN THE EARLY years aviation flights terminated due engine failure Pioneers quick realize safety fac tor multiple engines Weight maneuverabil ity costs limiting factors however Single-engine aircraft continued dominate private small business aviation until advent so-called Ught twins introduced 195 Os Since time have multitude small twin-engine aircraft offered least push-pull engine arrangement four-engine version Cessna Most de signed carry minimum five people upwards dozen Derringer served inspiration pseudo-scale model deemed some ultimate sport/business twin uniquely designed two people design provides combination twin-engine safety pure fun multi-engine flight Full-size multi-engine aircraft arent ones fun fly After mastering basic Control Line flying skills addition 52 Model Aviation 1-rom oouomsioecan oeseen nowinemain ianoinggearwiresiipsiflto hole plywood nacelle bottom secured standard nylon landing gear clamps Retain wheels soldered washers wheel collars nose gear gouno wiin snreao woou oowel gluea hole nose/doubler Note firewall angle provide side-thrust outward engine Side-thrust must outboard engine Derringer two-place light twin general aviation market present Design sleek sporty demanding modern paint scheme Models control outlines made automotive trim tape Entire f angled provide line tension flight Forward-projecting nose gear saves props rough landings Model great introduction multi flight Long something different CL sport model twin mild 1/2A5 may just ticket Idea first venture multi-engines second power plant adds new excitement modeling First neat sound two engines working unison theres challenge maintaining flight engine fuel exhausted engine before other finally joy having something bit different flying field son have enjoyed multi-engine Control Line years beginning old converted-to-twin Ambroid Whipsaw DC-3 110 Bell X-P twin pusher finally Derringer Derringer intended first venture world multi-engine Control Line flight has designed ease construction important accurate alignment components [he basic model constructed right over plan pinned building board until final stages construction Any modeler has completed two kits has mastered basic flying engine operating skills should ready Derringer Begin construction wing width chord wing designed utilize 4-in May 1981 53 Nose doublers Vs-in balsa add strength fuselage-wing joint Engines side-mounsca oniy tor sake appearanceimproves sideimprove models appearance Engine nacelles built-up ensure view profile Rotate tank keep filler/vents needle valve vertical good glue bond add rigidity thereby reducing vibration sure fuel intake inside tank points outside circle FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 ALL WOOO IS BALSA EAW AS ROOTS ~wALct1KLJahL 7 TLOS OR CLOTS SPACESOFFSET LS SOEST ORAP TO ISOcoo ossBALaNcE AROSERELO SARE STVMeWSEASTS/S ROEET cr 5S 015 /SS SO REEL I-ES El S/S EA o EEILCOAAO I/WI SIWIm S REET SRJCE SIS V SA TE aESORWI NAVEL RRAO IRA 1VR ROEET ARROWS III LISRESC WIRE LSAESSC RFE 0 5/rAAORO WEE III I-SIR ROWE OR LI/S STEELS IV COA VOSTROL SOON SLERMAO 13 REARER SRAVSTSROOEV IA LA EIS/RTS BALSAOSELA IS/EOS/STEOTOVOVSSLE VSO LS SALSAR 55 LV VELTSA4SALSAO OSLO LI ILSOSEOLSAOSSLC OUR/WI OAEALSAA SALC II/SOYEALOAXRALC II LROASALSAVSSLC I111111/ w IIr4SCI ft4ZLLLIL-~VL IL--4ItIIIf IIIIIIII ~zIz1VErir 11r ILRV400JVL- IV i7------4A------4--------- ft1-TZ04Ii 1 TfII Z77VI ITlit IIIIIIII OW WEASYTAL LA 01/4AIR S SS S/A SOUSA ER LOLOHA EOVELOVE VETS IK~I/SO S Al ThE DERRINGER IRA TISSN AEWOSPO ASO SCALP ST CE AVOROT ORASCO AT 0 OAAAOT ss 5055 sheet allowing trimming obtain straight edges compensating top sheets slightly greater width requirement due airfoil curvature 4-in sheet unavailable join narrower strips edge-to-edge will probably require truing up using straightedge good way join sheets tape together side masking tape flat bench fold back open up joint glue applied laid bench tape-side down held place weights until dry fit sheet Nylon control horn moves one-piece elevator Soldered washer retains pushrod least control sensivity pushrod goes Outer hole edges very good new cyanoacrylate glues will speed things up Remove tape dry Tack plan building board cover plastic kitchen wrap Study plan care fully before beginning construction wing internal details will obscured during construc tion Because rib locations shown outside component outlines Pin trimmed bottom wing sheet down over plan glue place eading edge 3/16 red trailing-edge stock Vs spars Cut out 22 ribs Vs sheet Mark drill ribs have leadout wires running through Glue ribs place Add top spar 1 / 16 vertical webbing between spars Out third rib tip Bind solder leadout wires 2-in bellcrank bolt bellcrank 3/32 plywood mount Secure mounting nut drop epoxy glue prevent its loosening due vibration Install 1/16-in music wire pushrod bellcrank install complete assembly wingthreading leadout wires through pre-drilled holes ribs Add /2-oz weight 4 pennies outboard wing tip glue securely Carefully trim top sheeting proper width glue place securing pins weights rubberbands An inch-thick stack magazines works well Make wing tips scrap balsa Drill leadout holes left tip line brass nylon tubing Glue place completely dry remove wing board shape leading edges wing tips Sand thoroughly Rough-out two fuselage parts t Continued page 121 Rear view Derringer shows general layout also reveals high aspect-ratio wing Model constructed aligned right over plan After removal fuselage bottom nacelles capped completing structure System assures accurate alignment 54 Model Aviation 1 S/WI BALSA S/TA VS RROSS IL about 3000 rpm ringed version seen Nationals enough horsepower compete nowdominant Fox 36 John also mentioned soon-to-be-released FAT 15 designed FAT Combat Competitive horsepower lower nitro ease handling promise make engine very popular youre after ounce power rd recommend Nelson 15s will available June Fox 36 appears work better new venturi arrangement liner shim shim liner up flying Fast Combat take shim out Slow need midrange punch pulling heavier planes suction Naturally have move head compensate new venturi also improve ment partly because better fit partly having spraybar moved outboard some whatit helps keeping engine running over-lean end tank Tanks have bunch last issue no hit streets received UPS shipment Randys Model Aeronautics 515 Coleman Blvd Mt Pleasant SC 29464 must dozen different types tanks test Randys tanks basically familiar Dons tanks know Theyre really well made some come uniflow venting have good solder joints wash out real well gas burner stove just itching get since through Regionals can now get down testing some samples people have sent about Craig Cervos cheap alternative commercial tanksCarnation milk cans Somebody sent sample has vents pickup lines know what theyre it minute its almost April 1st Charlie Johnsoz 3716 Ingraham St San Diego CA 92109 Derringer/H aught Continued page 54 glue together seam line dry complete shaping Wrap sandpaper over top wing use wing sanding block finish wing saddle fuselage best accomplished wing secured bench moving fuselage back forth sideways over sandpaper Fabri cate engine nacelle sides fuselage nose doublers similar manner Cut out shape stabilizer elevators t Elevators may joined stabilizer time using three favorite hinges Join shape rudder parts Begin final assembly pinning wing stabilizer place over plan Glue fuselage position being sure perpendicular plan check square small triangle Sand rear edges fuselage doublers shape glue place Install engine nacelle sides 1/16 sheet over top careful cover over pins securing structure building board Glue rudder place offsetting leading edge left looking rear sure vertical checking square Allow dry thoroughly remove building board Cut engine nacelle bottoms 3/32 plywood Note small blocks receive landing gear wires may solid hardwood laminated scraps plywood edges nacelle bottoms should beveled except leading edge Glue place under wing nacelle sides Install re strip fuselage bottom doublers Note angle firewalls sand nacelles angle inboard engine may left Don McCarthy Ace Aero Sport Cannon Cirrus Kraft World Engines EK Logictrol Micro Avionics Pro Line Orbit Mathes MRC * RS Systems Royal Simprop Jerobee ALSO WARRANTY SERVICE QUALITY SER VICE FOR ALL BRANDS Z Factory trained technicians over 15 years Radio Control Electronics HOURS Cloged Sun & Mon lOam-B pmWedFri 10 am6 pm Sat 10 am-2 pm 714 639-8886 941 N MAIN ST ORANGE CALIFORNIA 92667 0 May1981 121 \uthorizec FACTORY AUTHORIZED SER VICE QdiO FOR ALL OF THE FOLLOWING BRA NDS QontroI ervice DO 110___ TWENTY-SEVENTH N UAL RADIO CONTROL EXPOSITION DO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 1011 &12 1981 FRIDAY 9am-6pm SATURDAY 9am-6pm SUNDAY gam-43OPm I presented WEAK SIGNALS R/C CLUB 20 BOX 5772 TOLEDO OHIO 43613 NO NONSENSE BALSA STRIPPERS NU Strips Balsa FUZZ Freew/out Adjustments Small $10 00 Large shown $20 00 Please add $1 00 postage PNut Kits GEE BEE shown $600 please ad 51 00 postagE Catalog 75 Miniature Replicas See uealer uruer GENE DUBOIS1 P0 Box Acushnet MA 02743 ...DEALER INQUIRIES INVITED P 0 BOX 2496 MA PES aUEKf-w7aIeS LA MEaA CALIF 92041 PHONE 714 44e8e75 714 442-4636 straight desired angle shown outboard engine important maintain line tension inboard engine quits first flight Firewalls made laminating two pieces 3/32 plywood using single piece plywood Glue securely epoxy Bend landing gear parts 3/32-in music wire Bind nose gear wire piece Ys dowel heavy thread fine wire Drill hole fuselage accept nose gear best accomplished piece sharpened brass tubingrather drill bitto avoid acciden tai splitting chipping Coat assembly epoxy glue push place Give model final sanding proceed favorite finish would suggest traditional fuel-proof dope Fill imperfections plastic balsa Give complete model two coats clear dope sanding lightly after coat Apply coat commerciai sanding sealer make own adding talcum powder clear dope until consistency cream Sandthis coat aimost completely away leaving filler wood grain Add two coats clear should now have good base color finish Brush preferably spray couple coats basic color Dope sold aerosol cans works great small model like Let basic finish dry couple days before adding trim Trim may either painted using masking tape may simply apply some new plastic trim tapes trimming dope use brush avoid necessity masking entire model paint trim sure seal edges masking tape clear dope prevents paint seeping under tape spoiling job used striping tape control surface outlines coat paste wax will protect trim tapes model now ready final touches Install main landing gear wires securing nylon straps screws Secure wheels collars soldered washers Bolt nylon control horn elevator hook up pushrod Check control movement Place control rod outer holes elevator horn reduce control sensitivity Form loops leadout wires bind copper wire solder Attach engines firewalls * 3 x i screws englnes mounted upright remove tanks place fuel feed lines toward outside flight circle reinstail tanks filler tubes vertical Install 6-in propellers 3-in pitch origlnal model powered Cox Baby Bee englnes Golden Bees work fine glve longer flights McCoy 049 engines should work equally well Cox Black Widow englnes would probably put out little too much power Check baiance point shown plan try fly slightly tail-heavy airplane will very sensitive difficult control slightly nose-heavy model safe fly will sluggish Add ballast necessary bring model balance Tail weight may epoxied fuselage side under stabilizer Nose weight best inserted hole nose doublers cut sharpened piece brass tubing Flying Derringer much like flying other model few precautions differences need consider First foremost never fly anything metal lines Fabric lines used sport flying will hold twin Size 008-in multistrand 35-ft ideal Fuel prime both englnes before starting INTRODUCING THE NEW RAPIER Control functions ailerons elevators rudder throttle All-balsa construction Instruction manual step-by-step building Kit includes die-cut balsa pre-shaped parts hardwoodplywood landing gear hardware Introductory price INNOVATION IN MODELINI 2657 N E 1881h SIreel $OIi95 Miami Florida 33180 Telephone 935-1436 122 Model Aviation KWH 13 ii LACEY M-1O 11 PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M19 ANDRESONDRUINE C0APLETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND PLANS FOR RUBBER POWERED MODELS w ILGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience EE Fu 1925 E Creighton Road NNIRJI modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control VISA Line Pensacola FL 32504 904/478-6745 first engine Use fuel bulb some other system top-off both tanks engines runningjust before releasing model Start inboard engine first will reaching over running engine starting second Tune engines just under peak rpm sure both engines running right direction checking breeze off prop Keep rag handy toss prop stop engines need arises basic concern multi-engine flight airplanes behavior dead engine As long line tension maintained single-engine performances will satisfactory outboard engine quits first line tension no problem inboard engine quits first outboard engine will maintain line tension has proper side-thrust shown plans speed/performance Derringer directly related engine-propeller combinations model seems too fast experiment shorter-diameter lesser-pitch propellers Cox makes nice three-blade prop works well looks great rubber spinner combination nice electric starter starter eliminates problem engine running backwards Pick calm day test flights enter new stage aeromodeling reed about Model ing advertisers mention FF Indoor/Tenny Continued page 58 too steady Photo 4 close-up adjustable support tail boom curved top support works well both built-up rolled tail booms height adjustment simple tissue socket round peg about twice diameter normally use wing posts Photo 5 close-up parallel bar support construction wire post anchored base drilling hole through base using epoxy tie wire base square reinforcement block base 3/16-in x 1 -in balsa vertical wire 1/16-in music wire Just above base Photo 4 parallel bar bar itself made 1/16-in x 1-in balsa black sliding tube neoprene fuel tubing neoprene tubing fastened bar two pieces wire bent U shape pressed through bar wires fastened bar back dabs epoxy wires can pinched together somewhat needlenose pliers adjust easly bar slides wire post Model assembly follow certain proce dure assembling Indoor model possible assure best possible alignment finished model fixtures discussed above similar setup will work very well example once motor stick has assembled braced desired next logical step attach tall boom Fasten motor stick cradle shown Photo 3 take special pains stick rotated thrust bearing exactly vertical use offset bearing vertical model completely assembled necessary sure thrust bearing makes proper angie vertical Once alignment motor stick complete mate tail boom rear motor stick Presumably will some means make motor stick support front boom such balsa sleeve reinforces stick/boom junction Support rear boom adjustable stand sight along stick/boom combination front rear boom offset torn carefully adjust stands position until correct angle achieved Some us eyeball adjustment better measure offset reference straightedge possible No glue yet Once boom alignment correct horizontal plane measure distance top boom front rear boom Most builders make boom tilt up toward rear stabilizer has small amount negative incidence respect centerline motor stick usually makes easier get proper wing incidence during test flying results having both wing r s CAP YOUR CLUB LOGO Great NC CIubsI I Low Minimum Reasonable Prices I I Good Service InquireCall Write cuatomEl printed TEE TOP DOG TS too 4730 SW 75th Ave 4jJyf Miami FL 33155 1305 261 7768 1 BLAINES PLANES & R/C Box 109A Rt 1 Fremont IN 46737 May 1981 123 Let Know Members Arel PRA CT/CE AEROBA TICS ON PENNIES INSTEAD OF DOLLARS INTRODUCING THE MISER FOR 1981 R/C SPORT FLYER DELUXE Four channel radio mixer required flaperons Stable smooth flying characteristics Responds like controline aerobatic model Youll love MISER ECONOMY plus PERFORMANCE - plus STYLE-on 15 Eng 15- 25 Max Chord 13 Wing Area 385 sq Symmetrical Wing Span 36 Length 36 Kit $3995 Plans $500 Shipped prepaid USA No handling charge Order exclusively from
Edition: Model Aviation - 1981/05
Page Numbers: 52, 53, 54, 121, 122, 123
Clarence Haught DEDflZNGE~ IN THE EARLY years aviation flights terminated due engine failure Pioneers quick realize safety fac tor multiple engines Weight maneuverabil ity costs limiting factors however Single-engine aircraft continued dominate private small business aviation until advent so-called Ught twins introduced 195 Os Since time have multitude small twin-engine aircraft offered least push-pull engine arrangement four-engine version Cessna Most de signed carry minimum five people upwards dozen Derringer served inspiration pseudo-scale model deemed some ultimate sport/business twin uniquely designed two people design provides combination twin-engine safety pure fun multi-engine flight Full-size multi-engine aircraft arent ones fun fly After mastering basic Control Line flying skills addition 52 Model Aviation 1-rom oouomsioecan oeseen nowinemain ianoinggearwiresiipsiflto hole plywood nacelle bottom secured standard nylon landing gear clamps Retain wheels soldered washers wheel collars nose gear gouno wiin snreao woou oowel gluea hole nose/doubler Note firewall angle provide side-thrust outward engine Side-thrust must outboard engine Derringer two-place light twin general aviation market present Design sleek sporty demanding modern paint scheme Models control outlines made automotive trim tape Entire f angled provide line tension flight Forward-projecting nose gear saves props rough landings Model great introduction multi flight Long something different CL sport model twin mild 1/2A5 may just ticket Idea first venture multi-engines second power plant adds new excitement modeling First neat sound two engines working unison theres challenge maintaining flight engine fuel exhausted engine before other finally joy having something bit different flying field son have enjoyed multi-engine Control Line years beginning old converted-to-twin Ambroid Whipsaw DC-3 110 Bell X-P twin pusher finally Derringer Derringer intended first venture world multi-engine Control Line flight has designed ease construction important accurate alignment components [he basic model constructed right over plan pinned building board until final stages construction Any modeler has completed two kits has mastered basic flying engine operating skills should ready Derringer Begin construction wing width chord wing designed utilize 4-in May 1981 53 Nose doublers Vs-in balsa add strength fuselage-wing joint Engines side-mounsca oniy tor sake appearanceimproves sideimprove models appearance Engine nacelles built-up ensure view profile Rotate tank keep filler/vents needle valve vertical good glue bond add rigidity thereby reducing vibration sure fuel intake inside tank points outside circle FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 ALL WOOO IS BALSA EAW AS ROOTS ~wALct1KLJahL 7 TLOS OR CLOTS SPACESOFFSET LS SOEST ORAP TO ISOcoo ossBALaNcE AROSERELO SARE STVMeWSEASTS/S ROEET cr 5S 015 /SS SO REEL I-ES El S/S EA o EEILCOAAO I/WI SIWIm S REET SRJCE SIS V SA TE aESORWI NAVEL RRAO IRA 1VR ROEET ARROWS III LISRESC WIRE LSAESSC RFE 0 5/rAAORO WEE III I-SIR ROWE OR LI/S STEELS IV COA VOSTROL SOON SLERMAO 13 REARER SRAVSTSROOEV IA LA EIS/RTS BALSAOSELA IS/EOS/STEOTOVOVSSLE VSO LS SALSAR 55 LV VELTSA4SALSAO OSLO LI ILSOSEOLSAOSSLC OUR/WI OAEALSAA SALC II/SOYEALOAXRALC II LROASALSAVSSLC I111111/ w IIr4SCI ft4ZLLLIL-~VL IL--4ItIIIf IIIIIIII ~zIz1VErir 11r ILRV400JVL- IV i7------4A------4--------- ft1-TZ04Ii 1 TfII Z77VI ITlit IIIIIIII OW WEASYTAL LA 01/4AIR S SS S/A SOUSA ER LOLOHA EOVELOVE VETS IK~I/SO S Al ThE DERRINGER IRA TISSN AEWOSPO ASO SCALP ST CE AVOROT ORASCO AT 0 OAAAOT ss 5055 sheet allowing trimming obtain straight edges compensating top sheets slightly greater width requirement due airfoil curvature 4-in sheet unavailable join narrower strips edge-to-edge will probably require truing up using straightedge good way join sheets tape together side masking tape flat bench fold back open up joint glue applied laid bench tape-side down held place weights until dry fit sheet Nylon control horn moves one-piece elevator Soldered washer retains pushrod least control sensivity pushrod goes Outer hole edges very good new cyanoacrylate glues will speed things up Remove tape dry Tack plan building board cover plastic kitchen wrap Study plan care fully before beginning construction wing internal details will obscured during construc tion Because rib locations shown outside component outlines Pin trimmed bottom wing sheet down over plan glue place eading edge 3/16 red trailing-edge stock Vs spars Cut out 22 ribs Vs sheet Mark drill ribs have leadout wires running through Glue ribs place Add top spar 1 / 16 vertical webbing between spars Out third rib tip Bind solder leadout wires 2-in bellcrank bolt bellcrank 3/32 plywood mount Secure mounting nut drop epoxy glue prevent its loosening due vibration Install 1/16-in music wire pushrod bellcrank install complete assembly wingthreading leadout wires through pre-drilled holes ribs Add /2-oz weight 4 pennies outboard wing tip glue securely Carefully trim top sheeting proper width glue place securing pins weights rubberbands An inch-thick stack magazines works well Make wing tips scrap balsa Drill leadout holes left tip line brass nylon tubing Glue place completely dry remove wing board shape leading edges wing tips Sand thoroughly Rough-out two fuselage parts t Continued page 121 Rear view Derringer shows general layout also reveals high aspect-ratio wing Model constructed aligned right over plan After removal fuselage bottom nacelles capped completing structure System assures accurate alignment 54 Model Aviation 1 S/WI BALSA S/TA VS RROSS IL about 3000 rpm ringed version seen Nationals enough horsepower compete nowdominant Fox 36 John also mentioned soon-to-be-released FAT 15 designed FAT Combat Competitive horsepower lower nitro ease handling promise make engine very popular youre after ounce power rd recommend Nelson 15s will available June Fox 36 appears work better new venturi arrangement liner shim shim liner up flying Fast Combat take shim out Slow need midrange punch pulling heavier planes suction Naturally have move head compensate new venturi also improve ment partly because better fit partly having spraybar moved outboard some whatit helps keeping engine running over-lean end tank Tanks have bunch last issue no hit streets received UPS shipment Randys Model Aeronautics 515 Coleman Blvd Mt Pleasant SC 29464 must dozen different types tanks test Randys tanks basically familiar Dons tanks know Theyre really well made some come uniflow venting have good solder joints wash out real well gas burner stove just itching get since through Regionals can now get down testing some samples people have sent about Craig Cervos cheap alternative commercial tanksCarnation milk cans Somebody sent sample has vents pickup lines know what theyre it minute its almost April 1st Charlie Johnsoz 3716 Ingraham St San Diego CA 92109 Derringer/H aught Continued page 54 glue together seam line dry complete shaping Wrap sandpaper over top wing use wing sanding block finish wing saddle fuselage best accomplished wing secured bench moving fuselage back forth sideways over sandpaper Fabri cate engine nacelle sides fuselage nose doublers similar manner Cut out shape stabilizer elevators t Elevators may joined stabilizer time using three favorite hinges Join shape rudder parts Begin final assembly pinning wing stabilizer place over plan Glue fuselage position being sure perpendicular plan check square small triangle Sand rear edges fuselage doublers shape glue place Install engine nacelle sides 1/16 sheet over top careful cover over pins securing structure building board Glue rudder place offsetting leading edge left looking rear sure vertical checking square Allow dry thoroughly remove building board Cut engine nacelle bottoms 3/32 plywood Note small blocks receive landing gear wires may solid hardwood laminated scraps plywood edges nacelle bottoms should beveled except leading edge Glue place under wing nacelle sides Install re strip fuselage bottom doublers Note angle firewalls sand nacelles angle inboard engine may left Don McCarthy Ace Aero Sport Cannon Cirrus Kraft World Engines EK Logictrol Micro Avionics Pro Line Orbit Mathes MRC * RS Systems Royal Simprop Jerobee ALSO WARRANTY SERVICE QUALITY SER VICE FOR ALL BRANDS Z Factory trained technicians over 15 years Radio Control Electronics HOURS Cloged Sun & Mon lOam-B pmWedFri 10 am6 pm Sat 10 am-2 pm 714 639-8886 941 N MAIN ST ORANGE CALIFORNIA 92667 0 May1981 121 \uthorizec FACTORY AUTHORIZED SER VICE QdiO FOR ALL OF THE FOLLOWING BRA NDS QontroI ervice DO 110___ TWENTY-SEVENTH N UAL RADIO CONTROL EXPOSITION DO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 1011 &12 1981 FRIDAY 9am-6pm SATURDAY 9am-6pm SUNDAY gam-43OPm I presented WEAK SIGNALS R/C CLUB 20 BOX 5772 TOLEDO OHIO 43613 NO NONSENSE BALSA STRIPPERS NU Strips Balsa FUZZ Freew/out Adjustments Small $10 00 Large shown $20 00 Please add $1 00 postage PNut Kits GEE BEE shown $600 please ad 51 00 postagE Catalog 75 Miniature Replicas See uealer uruer GENE DUBOIS1 P0 Box Acushnet MA 02743 ...DEALER INQUIRIES INVITED P 0 BOX 2496 MA PES aUEKf-w7aIeS LA MEaA CALIF 92041 PHONE 714 44e8e75 714 442-4636 straight desired angle shown outboard engine important maintain line tension inboard engine quits first flight Firewalls made laminating two pieces 3/32 plywood using single piece plywood Glue securely epoxy Bend landing gear parts 3/32-in music wire Bind nose gear wire piece Ys dowel heavy thread fine wire Drill hole fuselage accept nose gear best accomplished piece sharpened brass tubingrather drill bitto avoid acciden tai splitting chipping Coat assembly epoxy glue push place Give model final sanding proceed favorite finish would suggest traditional fuel-proof dope Fill imperfections plastic balsa Give complete model two coats clear dope sanding lightly after coat Apply coat commerciai sanding sealer make own adding talcum powder clear dope until consistency cream Sandthis coat aimost completely away leaving filler wood grain Add two coats clear should now have good base color finish Brush preferably spray couple coats basic color Dope sold aerosol cans works great small model like Let basic finish dry couple days before adding trim Trim may either painted using masking tape may simply apply some new plastic trim tapes trimming dope use brush avoid necessity masking entire model paint trim sure seal edges masking tape clear dope prevents paint seeping under tape spoiling job used striping tape control surface outlines coat paste wax will protect trim tapes model now ready final touches Install main landing gear wires securing nylon straps screws Secure wheels collars soldered washers Bolt nylon control horn elevator hook up pushrod Check control movement Place control rod outer holes elevator horn reduce control sensitivity Form loops leadout wires bind copper wire solder Attach engines firewalls * 3 x i screws englnes mounted upright remove tanks place fuel feed lines toward outside flight circle reinstail tanks filler tubes vertical Install 6-in propellers 3-in pitch origlnal model powered Cox Baby Bee englnes Golden Bees work fine glve longer flights McCoy 049 engines should work equally well Cox Black Widow englnes would probably put out little too much power Check baiance point shown plan try fly slightly tail-heavy airplane will very sensitive difficult control slightly nose-heavy model safe fly will sluggish Add ballast necessary bring model balance Tail weight may epoxied fuselage side under stabilizer Nose weight best inserted hole nose doublers cut sharpened piece brass tubing Flying Derringer much like flying other model few precautions differences need consider First foremost never fly anything metal lines Fabric lines used sport flying will hold twin Size 008-in multistrand 35-ft ideal Fuel prime both englnes before starting INTRODUCING THE NEW RAPIER Control functions ailerons elevators rudder throttle All-balsa construction Instruction manual step-by-step building Kit includes die-cut balsa pre-shaped parts hardwoodplywood landing gear hardware Introductory price INNOVATION IN MODELINI 2657 N E 1881h SIreel $OIi95 Miami Florida 33180 Telephone 935-1436 122 Model Aviation KWH 13 ii LACEY M-1O 11 PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M19 ANDRESONDRUINE C0APLETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND PLANS FOR RUBBER POWERED MODELS w ILGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience EE Fu 1925 E Creighton Road NNIRJI modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control VISA Line Pensacola FL 32504 904/478-6745 first engine Use fuel bulb some other system top-off both tanks engines runningjust before releasing model Start inboard engine first will reaching over running engine starting second Tune engines just under peak rpm sure both engines running right direction checking breeze off prop Keep rag handy toss prop stop engines need arises basic concern multi-engine flight airplanes behavior dead engine As long line tension maintained single-engine performances will satisfactory outboard engine quits first line tension no problem inboard engine quits first outboard engine will maintain line tension has proper side-thrust shown plans speed/performance Derringer directly related engine-propeller combinations model seems too fast experiment shorter-diameter lesser-pitch propellers Cox makes nice three-blade prop works well looks great rubber spinner combination nice electric starter starter eliminates problem engine running backwards Pick calm day test flights enter new stage aeromodeling reed about Model ing advertisers mention FF Indoor/Tenny Continued page 58 too steady Photo 4 close-up adjustable support tail boom curved top support works well both built-up rolled tail booms height adjustment simple tissue socket round peg about twice diameter normally use wing posts Photo 5 close-up parallel bar support construction wire post anchored base drilling hole through base using epoxy tie wire base square reinforcement block base 3/16-in x 1 -in balsa vertical wire 1/16-in music wire Just above base Photo 4 parallel bar bar itself made 1/16-in x 1-in balsa black sliding tube neoprene fuel tubing neoprene tubing fastened bar two pieces wire bent U shape pressed through bar wires fastened bar back dabs epoxy wires can pinched together somewhat needlenose pliers adjust easly bar slides wire post Model assembly follow certain proce dure assembling Indoor model possible assure best possible alignment finished model fixtures discussed above similar setup will work very well example once motor stick has assembled braced desired next logical step attach tall boom Fasten motor stick cradle shown Photo 3 take special pains stick rotated thrust bearing exactly vertical use offset bearing vertical model completely assembled necessary sure thrust bearing makes proper angie vertical Once alignment motor stick complete mate tail boom rear motor stick Presumably will some means make motor stick support front boom such balsa sleeve reinforces stick/boom junction Support rear boom adjustable stand sight along stick/boom combination front rear boom offset torn carefully adjust stands position until correct angle achieved Some us eyeball adjustment better measure offset reference straightedge possible No glue yet Once boom alignment correct horizontal plane measure distance top boom front rear boom Most builders make boom tilt up toward rear stabilizer has small amount negative incidence respect centerline motor stick usually makes easier get proper wing incidence during test flying results having both wing r s CAP YOUR CLUB LOGO Great NC CIubsI I Low Minimum Reasonable Prices I I Good Service InquireCall Write cuatomEl printed TEE TOP DOG TS too 4730 SW 75th Ave 4jJyf Miami FL 33155 1305 261 7768 1 BLAINES PLANES & R/C Box 109A Rt 1 Fremont IN 46737 May 1981 123 Let Know Members Arel PRA CT/CE AEROBA TICS ON PENNIES INSTEAD OF DOLLARS INTRODUCING THE MISER FOR 1981 R/C SPORT FLYER DELUXE Four channel radio mixer required flaperons Stable smooth flying characteristics Responds like controline aerobatic model Youll love MISER ECONOMY plus PERFORMANCE - plus STYLE-on 15 Eng 15- 25 Max Chord 13 Wing Area 385 sq Symmetrical Wing Span 36 Length 36 Kit $3995 Plans $500 Shipped prepaid USA No handling charge Order exclusively from
Edition: Model Aviation - 1981/05
Page Numbers: 52, 53, 54, 121, 122, 123
Clarence Haught DEDflZNGE~ IN THE EARLY years aviation flights terminated due engine failure Pioneers quick realize safety fac tor multiple engines Weight maneuverabil ity costs limiting factors however Single-engine aircraft continued dominate private small business aviation until advent so-called Ught twins introduced 195 Os Since time have multitude small twin-engine aircraft offered least push-pull engine arrangement four-engine version Cessna Most de signed carry minimum five people upwards dozen Derringer served inspiration pseudo-scale model deemed some ultimate sport/business twin uniquely designed two people design provides combination twin-engine safety pure fun multi-engine flight Full-size multi-engine aircraft arent ones fun fly After mastering basic Control Line flying skills addition 52 Model Aviation 1-rom oouomsioecan oeseen nowinemain ianoinggearwiresiipsiflto hole plywood nacelle bottom secured standard nylon landing gear clamps Retain wheels soldered washers wheel collars nose gear gouno wiin snreao woou oowel gluea hole nose/doubler Note firewall angle provide side-thrust outward engine Side-thrust must outboard engine Derringer two-place light twin general aviation market present Design sleek sporty demanding modern paint scheme Models control outlines made automotive trim tape Entire f angled provide line tension flight Forward-projecting nose gear saves props rough landings Model great introduction multi flight Long something different CL sport model twin mild 1/2A5 may just ticket Idea first venture multi-engines second power plant adds new excitement modeling First neat sound two engines working unison theres challenge maintaining flight engine fuel exhausted engine before other finally joy having something bit different flying field son have enjoyed multi-engine Control Line years beginning old converted-to-twin Ambroid Whipsaw DC-3 110 Bell X-P twin pusher finally Derringer Derringer intended first venture world multi-engine Control Line flight has designed ease construction important accurate alignment components [he basic model constructed right over plan pinned building board until final stages construction Any modeler has completed two kits has mastered basic flying engine operating skills should ready Derringer Begin construction wing width chord wing designed utilize 4-in May 1981 53 Nose doublers Vs-in balsa add strength fuselage-wing joint Engines side-mounsca oniy tor sake appearanceimproves sideimprove models appearance Engine nacelles built-up ensure view profile Rotate tank keep filler/vents needle valve vertical good glue bond add rigidity thereby reducing vibration sure fuel intake inside tank points outside circle FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 ALL WOOO IS BALSA EAW AS ROOTS ~wALct1KLJahL 7 TLOS OR CLOTS SPACESOFFSET LS SOEST ORAP TO ISOcoo ossBALaNcE AROSERELO SARE STVMeWSEASTS/S ROEET cr 5S 015 /SS SO REEL I-ES El S/S EA o EEILCOAAO I/WI SIWIm S REET SRJCE SIS V SA TE aESORWI NAVEL RRAO IRA 1VR ROEET ARROWS III LISRESC WIRE LSAESSC RFE 0 5/rAAORO WEE III I-SIR ROWE OR LI/S STEELS IV COA VOSTROL SOON SLERMAO 13 REARER SRAVSTSROOEV IA LA EIS/RTS BALSAOSELA IS/EOS/STEOTOVOVSSLE VSO LS SALSAR 55 LV VELTSA4SALSAO OSLO LI ILSOSEOLSAOSSLC OUR/WI OAEALSAA SALC II/SOYEALOAXRALC II LROASALSAVSSLC I111111/ w IIr4SCI ft4ZLLLIL-~VL IL--4ItIIIf IIIIIIII ~zIz1VErir 11r ILRV400JVL- IV i7------4A------4--------- ft1-TZ04Ii 1 TfII Z77VI ITlit IIIIIIII OW WEASYTAL LA 01/4AIR S SS S/A SOUSA ER LOLOHA EOVELOVE VETS IK~I/SO S Al ThE DERRINGER IRA TISSN AEWOSPO ASO SCALP ST CE AVOROT ORASCO AT 0 OAAAOT ss 5055 sheet allowing trimming obtain straight edges compensating top sheets slightly greater width requirement due airfoil curvature 4-in sheet unavailable join narrower strips edge-to-edge will probably require truing up using straightedge good way join sheets tape together side masking tape flat bench fold back open up joint glue applied laid bench tape-side down held place weights until dry fit sheet Nylon control horn moves one-piece elevator Soldered washer retains pushrod least control sensivity pushrod goes Outer hole edges very good new cyanoacrylate glues will speed things up Remove tape dry Tack plan building board cover plastic kitchen wrap Study plan care fully before beginning construction wing internal details will obscured during construc tion Because rib locations shown outside component outlines Pin trimmed bottom wing sheet down over plan glue place eading edge 3/16 red trailing-edge stock Vs spars Cut out 22 ribs Vs sheet Mark drill ribs have leadout wires running through Glue ribs place Add top spar 1 / 16 vertical webbing between spars Out third rib tip Bind solder leadout wires 2-in bellcrank bolt bellcrank 3/32 plywood mount Secure mounting nut drop epoxy glue prevent its loosening due vibration Install 1/16-in music wire pushrod bellcrank install complete assembly wingthreading leadout wires through pre-drilled holes ribs Add /2-oz weight 4 pennies outboard wing tip glue securely Carefully trim top sheeting proper width glue place securing pins weights rubberbands An inch-thick stack magazines works well Make wing tips scrap balsa Drill leadout holes left tip line brass nylon tubing Glue place completely dry remove wing board shape leading edges wing tips Sand thoroughly Rough-out two fuselage parts t Continued page 121 Rear view Derringer shows general layout also reveals high aspect-ratio wing Model constructed aligned right over plan After removal fuselage bottom nacelles capped completing structure System assures accurate alignment 54 Model Aviation 1 S/WI BALSA S/TA VS RROSS IL about 3000 rpm ringed version seen Nationals enough horsepower compete nowdominant Fox 36 John also mentioned soon-to-be-released FAT 15 designed FAT Combat Competitive horsepower lower nitro ease handling promise make engine very popular youre after ounce power rd recommend Nelson 15s will available June Fox 36 appears work better new venturi arrangement liner shim shim liner up flying Fast Combat take shim out Slow need midrange punch pulling heavier planes suction Naturally have move head compensate new venturi also improve ment partly because better fit partly having spraybar moved outboard some whatit helps keeping engine running over-lean end tank Tanks have bunch last issue no hit streets received UPS shipment Randys Model Aeronautics 515 Coleman Blvd Mt Pleasant SC 29464 must dozen different types tanks test Randys tanks basically familiar Dons tanks know Theyre really well made some come uniflow venting have good solder joints wash out real well gas burner stove just itching get since through Regionals can now get down testing some samples people have sent about Craig Cervos cheap alternative commercial tanksCarnation milk cans Somebody sent sample has vents pickup lines know what theyre it minute its almost April 1st Charlie Johnsoz 3716 Ingraham St San Diego CA 92109 Derringer/H aught Continued page 54 glue together seam line dry complete shaping Wrap sandpaper over top wing use wing sanding block finish wing saddle fuselage best accomplished wing secured bench moving fuselage back forth sideways over sandpaper Fabri cate engine nacelle sides fuselage nose doublers similar manner Cut out shape stabilizer elevators t Elevators may joined stabilizer time using three favorite hinges Join shape rudder parts Begin final assembly pinning wing stabilizer place over plan Glue fuselage position being sure perpendicular plan check square small triangle Sand rear edges fuselage doublers shape glue place Install engine nacelle sides 1/16 sheet over top careful cover over pins securing structure building board Glue rudder place offsetting leading edge left looking rear sure vertical checking square Allow dry thoroughly remove building board Cut engine nacelle bottoms 3/32 plywood Note small blocks receive landing gear wires may solid hardwood laminated scraps plywood edges nacelle bottoms should beveled except leading edge Glue place under wing nacelle sides Install re strip fuselage bottom doublers Note angle firewalls sand nacelles angle inboard engine may left Don McCarthy Ace Aero Sport Cannon Cirrus Kraft World Engines EK Logictrol Micro Avionics Pro Line Orbit Mathes MRC * RS Systems Royal Simprop Jerobee ALSO WARRANTY SERVICE QUALITY SER VICE FOR ALL BRANDS Z Factory trained technicians over 15 years Radio Control Electronics HOURS Cloged Sun & Mon lOam-B pmWedFri 10 am6 pm Sat 10 am-2 pm 714 639-8886 941 N MAIN ST ORANGE CALIFORNIA 92667 0 May1981 121 \uthorizec FACTORY AUTHORIZED SER VICE QdiO FOR ALL OF THE FOLLOWING BRA NDS QontroI ervice DO 110___ TWENTY-SEVENTH N UAL RADIO CONTROL EXPOSITION DO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 1011 &12 1981 FRIDAY 9am-6pm SATURDAY 9am-6pm SUNDAY gam-43OPm I presented WEAK SIGNALS R/C CLUB 20 BOX 5772 TOLEDO OHIO 43613 NO NONSENSE BALSA STRIPPERS NU Strips Balsa FUZZ Freew/out Adjustments Small $10 00 Large shown $20 00 Please add $1 00 postage PNut Kits GEE BEE shown $600 please ad 51 00 postagE Catalog 75 Miniature Replicas See uealer uruer GENE DUBOIS1 P0 Box Acushnet MA 02743 ...DEALER INQUIRIES INVITED P 0 BOX 2496 MA PES aUEKf-w7aIeS LA MEaA CALIF 92041 PHONE 714 44e8e75 714 442-4636 straight desired angle shown outboard engine important maintain line tension inboard engine quits first flight Firewalls made laminating two pieces 3/32 plywood using single piece plywood Glue securely epoxy Bend landing gear parts 3/32-in music wire Bind nose gear wire piece Ys dowel heavy thread fine wire Drill hole fuselage accept nose gear best accomplished piece sharpened brass tubingrather drill bitto avoid acciden tai splitting chipping Coat assembly epoxy glue push place Give model final sanding proceed favorite finish would suggest traditional fuel-proof dope Fill imperfections plastic balsa Give complete model two coats clear dope sanding lightly after coat Apply coat commerciai sanding sealer make own adding talcum powder clear dope until consistency cream Sandthis coat aimost completely away leaving filler wood grain Add two coats clear should now have good base color finish Brush preferably spray couple coats basic color Dope sold aerosol cans works great small model like Let basic finish dry couple days before adding trim Trim may either painted using masking tape may simply apply some new plastic trim tapes trimming dope use brush avoid necessity masking entire model paint trim sure seal edges masking tape clear dope prevents paint seeping under tape spoiling job used striping tape control surface outlines coat paste wax will protect trim tapes model now ready final touches Install main landing gear wires securing nylon straps screws Secure wheels collars soldered washers Bolt nylon control horn elevator hook up pushrod Check control movement Place control rod outer holes elevator horn reduce control sensitivity Form loops leadout wires bind copper wire solder Attach engines firewalls * 3 x i screws englnes mounted upright remove tanks place fuel feed lines toward outside flight circle reinstail tanks filler tubes vertical Install 6-in propellers 3-in pitch origlnal model powered Cox Baby Bee englnes Golden Bees work fine glve longer flights McCoy 049 engines should work equally well Cox Black Widow englnes would probably put out little too much power Check baiance point shown plan try fly slightly tail-heavy airplane will very sensitive difficult control slightly nose-heavy model safe fly will sluggish Add ballast necessary bring model balance Tail weight may epoxied fuselage side under stabilizer Nose weight best inserted hole nose doublers cut sharpened piece brass tubing Flying Derringer much like flying other model few precautions differences need consider First foremost never fly anything metal lines Fabric lines used sport flying will hold twin Size 008-in multistrand 35-ft ideal Fuel prime both englnes before starting INTRODUCING THE NEW RAPIER Control functions ailerons elevators rudder throttle All-balsa construction Instruction manual step-by-step building Kit includes die-cut balsa pre-shaped parts hardwoodplywood landing gear hardware Introductory price INNOVATION IN MODELINI 2657 N E 1881h SIreel $OIi95 Miami Florida 33180 Telephone 935-1436 122 Model Aviation KWH 13 ii LACEY M-1O 11 PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M19 ANDRESONDRUINE C0APLETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND PLANS FOR RUBBER POWERED MODELS w ILGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience EE Fu 1925 E Creighton Road NNIRJI modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control VISA Line Pensacola FL 32504 904/478-6745 first engine Use fuel bulb some other system top-off both tanks engines runningjust before releasing model Start inboard engine first will reaching over running engine starting second Tune engines just under peak rpm sure both engines running right direction checking breeze off prop Keep rag handy toss prop stop engines need arises basic concern multi-engine flight airplanes behavior dead engine As long line tension maintained single-engine performances will satisfactory outboard engine quits first line tension no problem inboard engine quits first outboard engine will maintain line tension has proper side-thrust shown plans speed/performance Derringer directly related engine-propeller combinations model seems too fast experiment shorter-diameter lesser-pitch propellers Cox makes nice three-blade prop works well looks great rubber spinner combination nice electric starter starter eliminates problem engine running backwards Pick calm day test flights enter new stage aeromodeling reed about Model ing advertisers mention FF Indoor/Tenny Continued page 58 too steady Photo 4 close-up adjustable support tail boom curved top support works well both built-up rolled tail booms height adjustment simple tissue socket round peg about twice diameter normally use wing posts Photo 5 close-up parallel bar support construction wire post anchored base drilling hole through base using epoxy tie wire base square reinforcement block base 3/16-in x 1 -in balsa vertical wire 1/16-in music wire Just above base Photo 4 parallel bar bar itself made 1/16-in x 1-in balsa black sliding tube neoprene fuel tubing neoprene tubing fastened bar two pieces wire bent U shape pressed through bar wires fastened bar back dabs epoxy wires can pinched together somewhat needlenose pliers adjust easly bar slides wire post Model assembly follow certain proce dure assembling Indoor model possible assure best possible alignment finished model fixtures discussed above similar setup will work very well example once motor stick has assembled braced desired next logical step attach tall boom Fasten motor stick cradle shown Photo 3 take special pains stick rotated thrust bearing exactly vertical use offset bearing vertical model completely assembled necessary sure thrust bearing makes proper angie vertical Once alignment motor stick complete mate tail boom rear motor stick Presumably will some means make motor stick support front boom such balsa sleeve reinforces stick/boom junction Support rear boom adjustable stand sight along stick/boom combination front rear boom offset torn carefully adjust stands position until correct angle achieved Some us eyeball adjustment better measure offset reference straightedge possible No glue yet Once boom alignment correct horizontal plane measure distance top boom front rear boom Most builders make boom tilt up toward rear stabilizer has small amount negative incidence respect centerline motor stick usually makes easier get proper wing incidence during test flying results having both wing r s CAP YOUR CLUB LOGO Great NC CIubsI I Low Minimum Reasonable Prices I I Good Service InquireCall Write cuatomEl printed TEE TOP DOG TS too 4730 SW 75th Ave 4jJyf Miami FL 33155 1305 261 7768 1 BLAINES PLANES & R/C Box 109A Rt 1 Fremont IN 46737 May 1981 123 Let Know Members Arel PRA CT/CE AEROBA TICS ON PENNIES INSTEAD OF DOLLARS INTRODUCING THE MISER FOR 1981 R/C SPORT FLYER DELUXE Four channel radio mixer required flaperons Stable smooth flying characteristics Responds like controline aerobatic model Youll love MISER ECONOMY plus PERFORMANCE - plus STYLE-on 15 Eng 15- 25 Max Chord 13 Wing Area 385 sq Symmetrical Wing Span 36 Length 36 Kit $3995 Plans $500 Shipped prepaid USA No handling charge Order exclusively from
Edition: Model Aviation - 1981/05
Page Numbers: 52, 53, 54, 121, 122, 123
Clarence Haught DEDflZNGE~ IN THE EARLY years aviation flights terminated due engine failure Pioneers quick realize safety fac tor multiple engines Weight maneuverabil ity costs limiting factors however Single-engine aircraft continued dominate private small business aviation until advent so-called Ught twins introduced 195 Os Since time have multitude small twin-engine aircraft offered least push-pull engine arrangement four-engine version Cessna Most de signed carry minimum five people upwards dozen Derringer served inspiration pseudo-scale model deemed some ultimate sport/business twin uniquely designed two people design provides combination twin-engine safety pure fun multi-engine flight Full-size multi-engine aircraft arent ones fun fly After mastering basic Control Line flying skills addition 52 Model Aviation 1-rom oouomsioecan oeseen nowinemain ianoinggearwiresiipsiflto hole plywood nacelle bottom secured standard nylon landing gear clamps Retain wheels soldered washers wheel collars nose gear gouno wiin snreao woou oowel gluea hole nose/doubler Note firewall angle provide side-thrust outward engine Side-thrust must outboard engine Derringer two-place light twin general aviation market present Design sleek sporty demanding modern paint scheme Models control outlines made automotive trim tape Entire f angled provide line tension flight Forward-projecting nose gear saves props rough landings Model great introduction multi flight Long something different CL sport model twin mild 1/2A5 may just ticket Idea first venture multi-engines second power plant adds new excitement modeling First neat sound two engines working unison theres challenge maintaining flight engine fuel exhausted engine before other finally joy having something bit different flying field son have enjoyed multi-engine Control Line years beginning old converted-to-twin Ambroid Whipsaw DC-3 110 Bell X-P twin pusher finally Derringer Derringer intended first venture world multi-engine Control Line flight has designed ease construction important accurate alignment components [he basic model constructed right over plan pinned building board until final stages construction Any modeler has completed two kits has mastered basic flying engine operating skills should ready Derringer Begin construction wing width chord wing designed utilize 4-in May 1981 53 Nose doublers Vs-in balsa add strength fuselage-wing joint Engines side-mounsca oniy tor sake appearanceimproves sideimprove models appearance Engine nacelles built-up ensure view profile Rotate tank keep filler/vents needle valve vertical good glue bond add rigidity thereby reducing vibration sure fuel intake inside tank points outside circle FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 ALL WOOO IS BALSA EAW AS ROOTS ~wALct1KLJahL 7 TLOS OR CLOTS SPACESOFFSET LS SOEST ORAP TO ISOcoo ossBALaNcE AROSERELO SARE STVMeWSEASTS/S ROEET cr 5S 015 /SS SO REEL I-ES El S/S EA o EEILCOAAO I/WI SIWIm S REET SRJCE SIS V SA TE aESORWI NAVEL RRAO IRA 1VR ROEET ARROWS III LISRESC WIRE LSAESSC RFE 0 5/rAAORO WEE III I-SIR ROWE OR LI/S STEELS IV COA VOSTROL SOON SLERMAO 13 REARER SRAVSTSROOEV IA LA EIS/RTS BALSAOSELA IS/EOS/STEOTOVOVSSLE VSO LS SALSAR 55 LV VELTSA4SALSAO OSLO LI ILSOSEOLSAOSSLC OUR/WI OAEALSAA SALC II/SOYEALOAXRALC II LROASALSAVSSLC I111111/ w IIr4SCI ft4ZLLLIL-~VL IL--4ItIIIf IIIIIIII ~zIz1VErir 11r ILRV400JVL- IV i7------4A------4--------- ft1-TZ04Ii 1 TfII Z77VI ITlit IIIIIIII OW WEASYTAL LA 01/4AIR S SS S/A SOUSA ER LOLOHA EOVELOVE VETS IK~I/SO S Al ThE DERRINGER IRA TISSN AEWOSPO ASO SCALP ST CE AVOROT ORASCO AT 0 OAAAOT ss 5055 sheet allowing trimming obtain straight edges compensating top sheets slightly greater width requirement due airfoil curvature 4-in sheet unavailable join narrower strips edge-to-edge will probably require truing up using straightedge good way join sheets tape together side masking tape flat bench fold back open up joint glue applied laid bench tape-side down held place weights until dry fit sheet Nylon control horn moves one-piece elevator Soldered washer retains pushrod least control sensivity pushrod goes Outer hole edges very good new cyanoacrylate glues will speed things up Remove tape dry Tack plan building board cover plastic kitchen wrap Study plan care fully before beginning construction wing internal details will obscured during construc tion Because rib locations shown outside component outlines Pin trimmed bottom wing sheet down over plan glue place eading edge 3/16 red trailing-edge stock Vs spars Cut out 22 ribs Vs sheet Mark drill ribs have leadout wires running through Glue ribs place Add top spar 1 / 16 vertical webbing between spars Out third rib tip Bind solder leadout wires 2-in bellcrank bolt bellcrank 3/32 plywood mount Secure mounting nut drop epoxy glue prevent its loosening due vibration Install 1/16-in music wire pushrod bellcrank install complete assembly wingthreading leadout wires through pre-drilled holes ribs Add /2-oz weight 4 pennies outboard wing tip glue securely Carefully trim top sheeting proper width glue place securing pins weights rubberbands An inch-thick stack magazines works well Make wing tips scrap balsa Drill leadout holes left tip line brass nylon tubing Glue place completely dry remove wing board shape leading edges wing tips Sand thoroughly Rough-out two fuselage parts t Continued page 121 Rear view Derringer shows general layout also reveals high aspect-ratio wing Model constructed aligned right over plan After removal fuselage bottom nacelles capped completing structure System assures accurate alignment 54 Model Aviation 1 S/WI BALSA S/TA VS RROSS IL about 3000 rpm ringed version seen Nationals enough horsepower compete nowdominant Fox 36 John also mentioned soon-to-be-released FAT 15 designed FAT Combat Competitive horsepower lower nitro ease handling promise make engine very popular youre after ounce power rd recommend Nelson 15s will available June Fox 36 appears work better new venturi arrangement liner shim shim liner up flying Fast Combat take shim out Slow need midrange punch pulling heavier planes suction Naturally have move head compensate new venturi also improve ment partly because better fit partly having spraybar moved outboard some whatit helps keeping engine running over-lean end tank Tanks have bunch last issue no hit streets received UPS shipment Randys Model Aeronautics 515 Coleman Blvd Mt Pleasant SC 29464 must dozen different types tanks test Randys tanks basically familiar Dons tanks know Theyre really well made some come uniflow venting have good solder joints wash out real well gas burner stove just itching get since through Regionals can now get down testing some samples people have sent about Craig Cervos cheap alternative commercial tanksCarnation milk cans Somebody sent sample has vents pickup lines know what theyre it minute its almost April 1st Charlie Johnsoz 3716 Ingraham St San Diego CA 92109 Derringer/H aught Continued page 54 glue together seam line dry complete shaping Wrap sandpaper over top wing use wing sanding block finish wing saddle fuselage best accomplished wing secured bench moving fuselage back forth sideways over sandpaper Fabri cate engine nacelle sides fuselage nose doublers similar manner Cut out shape stabilizer elevators t Elevators may joined stabilizer time using three favorite hinges Join shape rudder parts Begin final assembly pinning wing stabilizer place over plan Glue fuselage position being sure perpendicular plan check square small triangle Sand rear edges fuselage doublers shape glue place Install engine nacelle sides 1/16 sheet over top careful cover over pins securing structure building board Glue rudder place offsetting leading edge left looking rear sure vertical checking square Allow dry thoroughly remove building board Cut engine nacelle bottoms 3/32 plywood Note small blocks receive landing gear wires may solid hardwood laminated scraps plywood edges nacelle bottoms should beveled except leading edge Glue place under wing nacelle sides Install re strip fuselage bottom doublers Note angle firewalls sand nacelles angle inboard engine may left Don McCarthy Ace Aero Sport Cannon Cirrus Kraft World Engines EK Logictrol Micro Avionics Pro Line Orbit Mathes MRC * RS Systems Royal Simprop Jerobee ALSO WARRANTY SERVICE QUALITY SER VICE FOR ALL BRANDS Z Factory trained technicians over 15 years Radio Control Electronics HOURS Cloged Sun & Mon lOam-B pmWedFri 10 am6 pm Sat 10 am-2 pm 714 639-8886 941 N MAIN ST ORANGE CALIFORNIA 92667 0 May1981 121 \uthorizec FACTORY AUTHORIZED SER VICE QdiO FOR ALL OF THE FOLLOWING BRA NDS QontroI ervice DO 110___ TWENTY-SEVENTH N UAL RADIO CONTROL EXPOSITION DO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 1011 &12 1981 FRIDAY 9am-6pm SATURDAY 9am-6pm SUNDAY gam-43OPm I presented WEAK SIGNALS R/C CLUB 20 BOX 5772 TOLEDO OHIO 43613 NO NONSENSE BALSA STRIPPERS NU Strips Balsa FUZZ Freew/out Adjustments Small $10 00 Large shown $20 00 Please add $1 00 postage PNut Kits GEE BEE shown $600 please ad 51 00 postagE Catalog 75 Miniature Replicas See uealer uruer GENE DUBOIS1 P0 Box Acushnet MA 02743 ...DEALER INQUIRIES INVITED P 0 BOX 2496 MA PES aUEKf-w7aIeS LA MEaA CALIF 92041 PHONE 714 44e8e75 714 442-4636 straight desired angle shown outboard engine important maintain line tension inboard engine quits first flight Firewalls made laminating two pieces 3/32 plywood using single piece plywood Glue securely epoxy Bend landing gear parts 3/32-in music wire Bind nose gear wire piece Ys dowel heavy thread fine wire Drill hole fuselage accept nose gear best accomplished piece sharpened brass tubingrather drill bitto avoid acciden tai splitting chipping Coat assembly epoxy glue push place Give model final sanding proceed favorite finish would suggest traditional fuel-proof dope Fill imperfections plastic balsa Give complete model two coats clear dope sanding lightly after coat Apply coat commerciai sanding sealer make own adding talcum powder clear dope until consistency cream Sandthis coat aimost completely away leaving filler wood grain Add two coats clear should now have good base color finish Brush preferably spray couple coats basic color Dope sold aerosol cans works great small model like Let basic finish dry couple days before adding trim Trim may either painted using masking tape may simply apply some new plastic trim tapes trimming dope use brush avoid necessity masking entire model paint trim sure seal edges masking tape clear dope prevents paint seeping under tape spoiling job used striping tape control surface outlines coat paste wax will protect trim tapes model now ready final touches Install main landing gear wires securing nylon straps screws Secure wheels collars soldered washers Bolt nylon control horn elevator hook up pushrod Check control movement Place control rod outer holes elevator horn reduce control sensitivity Form loops leadout wires bind copper wire solder Attach engines firewalls * 3 x i screws englnes mounted upright remove tanks place fuel feed lines toward outside flight circle reinstail tanks filler tubes vertical Install 6-in propellers 3-in pitch origlnal model powered Cox Baby Bee englnes Golden Bees work fine glve longer flights McCoy 049 engines should work equally well Cox Black Widow englnes would probably put out little too much power Check baiance point shown plan try fly slightly tail-heavy airplane will very sensitive difficult control slightly nose-heavy model safe fly will sluggish Add ballast necessary bring model balance Tail weight may epoxied fuselage side under stabilizer Nose weight best inserted hole nose doublers cut sharpened piece brass tubing Flying Derringer much like flying other model few precautions differences need consider First foremost never fly anything metal lines Fabric lines used sport flying will hold twin Size 008-in multistrand 35-ft ideal Fuel prime both englnes before starting INTRODUCING THE NEW RAPIER Control functions ailerons elevators rudder throttle All-balsa construction Instruction manual step-by-step building Kit includes die-cut balsa pre-shaped parts hardwoodplywood landing gear hardware Introductory price INNOVATION IN MODELINI 2657 N E 1881h SIreel $OIi95 Miami Florida 33180 Telephone 935-1436 122 Model Aviation KWH 13 ii LACEY M-1O 11 PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M19 ANDRESONDRUINE C0APLETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND PLANS FOR RUBBER POWERED MODELS w ILGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience EE Fu 1925 E Creighton Road NNIRJI modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control VISA Line Pensacola FL 32504 904/478-6745 first engine Use fuel bulb some other system top-off both tanks engines runningjust before releasing model Start inboard engine first will reaching over running engine starting second Tune engines just under peak rpm sure both engines running right direction checking breeze off prop Keep rag handy toss prop stop engines need arises basic concern multi-engine flight airplanes behavior dead engine As long line tension maintained single-engine performances will satisfactory outboard engine quits first line tension no problem inboard engine quits first outboard engine will maintain line tension has proper side-thrust shown plans speed/performance Derringer directly related engine-propeller combinations model seems too fast experiment shorter-diameter lesser-pitch propellers Cox makes nice three-blade prop works well looks great rubber spinner combination nice electric starter starter eliminates problem engine running backwards Pick calm day test flights enter new stage aeromodeling reed about Model ing advertisers mention FF Indoor/Tenny Continued page 58 too steady Photo 4 close-up adjustable support tail boom curved top support works well both built-up rolled tail booms height adjustment simple tissue socket round peg about twice diameter normally use wing posts Photo 5 close-up parallel bar support construction wire post anchored base drilling hole through base using epoxy tie wire base square reinforcement block base 3/16-in x 1 -in balsa vertical wire 1/16-in music wire Just above base Photo 4 parallel bar bar itself made 1/16-in x 1-in balsa black sliding tube neoprene fuel tubing neoprene tubing fastened bar two pieces wire bent U shape pressed through bar wires fastened bar back dabs epoxy wires can pinched together somewhat needlenose pliers adjust easly bar slides wire post Model assembly follow certain proce dure assembling Indoor model possible assure best possible alignment finished model fixtures discussed above similar setup will work very well example once motor stick has assembled braced desired next logical step attach tall boom Fasten motor stick cradle shown Photo 3 take special pains stick rotated thrust bearing exactly vertical use offset bearing vertical model completely assembled necessary sure thrust bearing makes proper angie vertical Once alignment motor stick complete mate tail boom rear motor stick Presumably will some means make motor stick support front boom such balsa sleeve reinforces stick/boom junction Support rear boom adjustable stand sight along stick/boom combination front rear boom offset torn carefully adjust stands position until correct angle achieved Some us eyeball adjustment better measure offset reference straightedge possible No glue yet Once boom alignment correct horizontal plane measure distance top boom front rear boom Most builders make boom tilt up toward rear stabilizer has small amount negative incidence respect centerline motor stick usually makes easier get proper wing incidence during test flying results having both wing r s CAP YOUR CLUB LOGO Great NC CIubsI I Low Minimum Reasonable Prices I I Good Service InquireCall Write cuatomEl printed TEE TOP DOG TS too 4730 SW 75th Ave 4jJyf Miami FL 33155 1305 261 7768 1 BLAINES PLANES & R/C Box 109A Rt 1 Fremont IN 46737 May 1981 123 Let Know Members Arel PRA CT/CE AEROBA TICS ON PENNIES INSTEAD OF DOLLARS INTRODUCING THE MISER FOR 1981 R/C SPORT FLYER DELUXE Four channel radio mixer required flaperons Stable smooth flying characteristics Responds like controline aerobatic model Youll love MISER ECONOMY plus PERFORMANCE - plus STYLE-on 15 Eng 15- 25 Max Chord 13 Wing Area 385 sq Symmetrical Wing Span 36 Length 36 Kit $3995 Plans $500 Shipped prepaid USA No handling charge Order exclusively from
Edition: Model Aviation - 1981/05
Page Numbers: 52, 53, 54, 121, 122, 123
Clarence Haught DEDflZNGE~ IN THE EARLY years aviation flights terminated due engine failure Pioneers quick realize safety fac tor multiple engines Weight maneuverabil ity costs limiting factors however Single-engine aircraft continued dominate private small business aviation until advent so-called Ught twins introduced 195 Os Since time have multitude small twin-engine aircraft offered least push-pull engine arrangement four-engine version Cessna Most de signed carry minimum five people upwards dozen Derringer served inspiration pseudo-scale model deemed some ultimate sport/business twin uniquely designed two people design provides combination twin-engine safety pure fun multi-engine flight Full-size multi-engine aircraft arent ones fun fly After mastering basic Control Line flying skills addition 52 Model Aviation 1-rom oouomsioecan oeseen nowinemain ianoinggearwiresiipsiflto hole plywood nacelle bottom secured standard nylon landing gear clamps Retain wheels soldered washers wheel collars nose gear gouno wiin snreao woou oowel gluea hole nose/doubler Note firewall angle provide side-thrust outward engine Side-thrust must outboard engine Derringer two-place light twin general aviation market present Design sleek sporty demanding modern paint scheme Models control outlines made automotive trim tape Entire f angled provide line tension flight Forward-projecting nose gear saves props rough landings Model great introduction multi flight Long something different CL sport model twin mild 1/2A5 may just ticket Idea first venture multi-engines second power plant adds new excitement modeling First neat sound two engines working unison theres challenge maintaining flight engine fuel exhausted engine before other finally joy having something bit different flying field son have enjoyed multi-engine Control Line years beginning old converted-to-twin Ambroid Whipsaw DC-3 110 Bell X-P twin pusher finally Derringer Derringer intended first venture world multi-engine Control Line flight has designed ease construction important accurate alignment components [he basic model constructed right over plan pinned building board until final stages construction Any modeler has completed two kits has mastered basic flying engine operating skills should ready Derringer Begin construction wing width chord wing designed utilize 4-in May 1981 53 Nose doublers Vs-in balsa add strength fuselage-wing joint Engines side-mounsca oniy tor sake appearanceimproves sideimprove models appearance Engine nacelles built-up ensure view profile Rotate tank keep filler/vents needle valve vertical good glue bond add rigidity thereby reducing vibration sure fuel intake inside tank points outside circle FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 ALL WOOO IS BALSA EAW AS ROOTS ~wALct1KLJahL 7 TLOS OR CLOTS SPACESOFFSET LS SOEST ORAP TO ISOcoo ossBALaNcE AROSERELO SARE STVMeWSEASTS/S ROEET cr 5S 015 /SS SO REEL I-ES El S/S EA o EEILCOAAO I/WI SIWIm S REET SRJCE SIS V SA TE aESORWI NAVEL RRAO IRA 1VR ROEET ARROWS III LISRESC WIRE LSAESSC RFE 0 5/rAAORO WEE III I-SIR ROWE OR LI/S STEELS IV COA VOSTROL SOON SLERMAO 13 REARER SRAVSTSROOEV IA LA EIS/RTS BALSAOSELA IS/EOS/STEOTOVOVSSLE VSO LS SALSAR 55 LV VELTSA4SALSAO OSLO LI ILSOSEOLSAOSSLC OUR/WI OAEALSAA SALC II/SOYEALOAXRALC II LROASALSAVSSLC I111111/ w IIr4SCI ft4ZLLLIL-~VL IL--4ItIIIf IIIIIIII ~zIz1VErir 11r ILRV400JVL- IV i7------4A------4--------- ft1-TZ04Ii 1 TfII Z77VI ITlit IIIIIIII OW WEASYTAL LA 01/4AIR S SS S/A SOUSA ER LOLOHA EOVELOVE VETS IK~I/SO S Al ThE DERRINGER IRA TISSN AEWOSPO ASO SCALP ST CE AVOROT ORASCO AT 0 OAAAOT ss 5055 sheet allowing trimming obtain straight edges compensating top sheets slightly greater width requirement due airfoil curvature 4-in sheet unavailable join narrower strips edge-to-edge will probably require truing up using straightedge good way join sheets tape together side masking tape flat bench fold back open up joint glue applied laid bench tape-side down held place weights until dry fit sheet Nylon control horn moves one-piece elevator Soldered washer retains pushrod least control sensivity pushrod goes Outer hole edges very good new cyanoacrylate glues will speed things up Remove tape dry Tack plan building board cover plastic kitchen wrap Study plan care fully before beginning construction wing internal details will obscured during construc tion Because rib locations shown outside component outlines Pin trimmed bottom wing sheet down over plan glue place eading edge 3/16 red trailing-edge stock Vs spars Cut out 22 ribs Vs sheet Mark drill ribs have leadout wires running through Glue ribs place Add top spar 1 / 16 vertical webbing between spars Out third rib tip Bind solder leadout wires 2-in bellcrank bolt bellcrank 3/32 plywood mount Secure mounting nut drop epoxy glue prevent its loosening due vibration Install 1/16-in music wire pushrod bellcrank install complete assembly wingthreading leadout wires through pre-drilled holes ribs Add /2-oz weight 4 pennies outboard wing tip glue securely Carefully trim top sheeting proper width glue place securing pins weights rubberbands An inch-thick stack magazines works well Make wing tips scrap balsa Drill leadout holes left tip line brass nylon tubing Glue place completely dry remove wing board shape leading edges wing tips Sand thoroughly Rough-out two fuselage parts t Continued page 121 Rear view Derringer shows general layout also reveals high aspect-ratio wing Model constructed aligned right over plan After removal fuselage bottom nacelles capped completing structure System assures accurate alignment 54 Model Aviation 1 S/WI BALSA S/TA VS RROSS IL about 3000 rpm ringed version seen Nationals enough horsepower compete nowdominant Fox 36 John also mentioned soon-to-be-released FAT 15 designed FAT Combat Competitive horsepower lower nitro ease handling promise make engine very popular youre after ounce power rd recommend Nelson 15s will available June Fox 36 appears work better new venturi arrangement liner shim shim liner up flying Fast Combat take shim out Slow need midrange punch pulling heavier planes suction Naturally have move head compensate new venturi also improve ment partly because better fit partly having spraybar moved outboard some whatit helps keeping engine running over-lean end tank Tanks have bunch last issue no hit streets received UPS shipment Randys Model Aeronautics 515 Coleman Blvd Mt Pleasant SC 29464 must dozen different types tanks test Randys tanks basically familiar Dons tanks know Theyre really well made some come uniflow venting have good solder joints wash out real well gas burner stove just itching get since through Regionals can now get down testing some samples people have sent about Craig Cervos cheap alternative commercial tanksCarnation milk cans Somebody sent sample has vents pickup lines know what theyre it minute its almost April 1st Charlie Johnsoz 3716 Ingraham St San Diego CA 92109 Derringer/H aught Continued page 54 glue together seam line dry complete shaping Wrap sandpaper over top wing use wing sanding block finish wing saddle fuselage best accomplished wing secured bench moving fuselage back forth sideways over sandpaper Fabri cate engine nacelle sides fuselage nose doublers similar manner Cut out shape stabilizer elevators t Elevators may joined stabilizer time using three favorite hinges Join shape rudder parts Begin final assembly pinning wing stabilizer place over plan Glue fuselage position being sure perpendicular plan check square small triangle Sand rear edges fuselage doublers shape glue place Install engine nacelle sides 1/16 sheet over top careful cover over pins securing structure building board Glue rudder place offsetting leading edge left looking rear sure vertical checking square Allow dry thoroughly remove building board Cut engine nacelle bottoms 3/32 plywood Note small blocks receive landing gear wires may solid hardwood laminated scraps plywood edges nacelle bottoms should beveled except leading edge Glue place under wing nacelle sides Install re strip fuselage bottom doublers Note angle firewalls sand nacelles angle inboard engine may left Don McCarthy Ace Aero Sport Cannon Cirrus Kraft World Engines EK Logictrol Micro Avionics Pro Line Orbit Mathes MRC * RS Systems Royal Simprop Jerobee ALSO WARRANTY SERVICE QUALITY SER VICE FOR ALL BRANDS Z Factory trained technicians over 15 years Radio Control Electronics HOURS Cloged Sun & Mon lOam-B pmWedFri 10 am6 pm Sat 10 am-2 pm 714 639-8886 941 N MAIN ST ORANGE CALIFORNIA 92667 0 May1981 121 \uthorizec FACTORY AUTHORIZED SER VICE QdiO FOR ALL OF THE FOLLOWING BRA NDS QontroI ervice DO 110___ TWENTY-SEVENTH N UAL RADIO CONTROL EXPOSITION DO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 1011 &12 1981 FRIDAY 9am-6pm SATURDAY 9am-6pm SUNDAY gam-43OPm I presented WEAK SIGNALS R/C CLUB 20 BOX 5772 TOLEDO OHIO 43613 NO NONSENSE BALSA STRIPPERS NU Strips Balsa FUZZ Freew/out Adjustments Small $10 00 Large shown $20 00 Please add $1 00 postage PNut Kits GEE BEE shown $600 please ad 51 00 postagE Catalog 75 Miniature Replicas See uealer uruer GENE DUBOIS1 P0 Box Acushnet MA 02743 ...DEALER INQUIRIES INVITED P 0 BOX 2496 MA PES aUEKf-w7aIeS LA MEaA CALIF 92041 PHONE 714 44e8e75 714 442-4636 straight desired angle shown outboard engine important maintain line tension inboard engine quits first flight Firewalls made laminating two pieces 3/32 plywood using single piece plywood Glue securely epoxy Bend landing gear parts 3/32-in music wire Bind nose gear wire piece Ys dowel heavy thread fine wire Drill hole fuselage accept nose gear best accomplished piece sharpened brass tubingrather drill bitto avoid acciden tai splitting chipping Coat assembly epoxy glue push place Give model final sanding proceed favorite finish would suggest traditional fuel-proof dope Fill imperfections plastic balsa Give complete model two coats clear dope sanding lightly after coat Apply coat commerciai sanding sealer make own adding talcum powder clear dope until consistency cream Sandthis coat aimost completely away leaving filler wood grain Add two coats clear should now have good base color finish Brush preferably spray couple coats basic color Dope sold aerosol cans works great small model like Let basic finish dry couple days before adding trim Trim may either painted using masking tape may simply apply some new plastic trim tapes trimming dope use brush avoid necessity masking entire model paint trim sure seal edges masking tape clear dope prevents paint seeping under tape spoiling job used striping tape control surface outlines coat paste wax will protect trim tapes model now ready final touches Install main landing gear wires securing nylon straps screws Secure wheels collars soldered washers Bolt nylon control horn elevator hook up pushrod Check control movement Place control rod outer holes elevator horn reduce control sensitivity Form loops leadout wires bind copper wire solder Attach engines firewalls * 3 x i screws englnes mounted upright remove tanks place fuel feed lines toward outside flight circle reinstail tanks filler tubes vertical Install 6-in propellers 3-in pitch origlnal model powered Cox Baby Bee englnes Golden Bees work fine glve longer flights McCoy 049 engines should work equally well Cox Black Widow englnes would probably put out little too much power Check baiance point shown plan try fly slightly tail-heavy airplane will very sensitive difficult control slightly nose-heavy model safe fly will sluggish Add ballast necessary bring model balance Tail weight may epoxied fuselage side under stabilizer Nose weight best inserted hole nose doublers cut sharpened piece brass tubing Flying Derringer much like flying other model few precautions differences need consider First foremost never fly anything metal lines Fabric lines used sport flying will hold twin Size 008-in multistrand 35-ft ideal Fuel prime both englnes before starting INTRODUCING THE NEW RAPIER Control functions ailerons elevators rudder throttle All-balsa construction Instruction manual step-by-step building Kit includes die-cut balsa pre-shaped parts hardwoodplywood landing gear hardware Introductory price INNOVATION IN MODELINI 2657 N E 1881h SIreel $OIi95 Miami Florida 33180 Telephone 935-1436 122 Model Aviation KWH 13 ii LACEY M-1O 11 PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M19 ANDRESONDRUINE C0APLETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND PLANS FOR RUBBER POWERED MODELS w ILGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience EE Fu 1925 E Creighton Road NNIRJI modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control VISA Line Pensacola FL 32504 904/478-6745 first engine Use fuel bulb some other system top-off both tanks engines runningjust before releasing model Start inboard engine first will reaching over running engine starting second Tune engines just under peak rpm sure both engines running right direction checking breeze off prop Keep rag handy toss prop stop engines need arises basic concern multi-engine flight airplanes behavior dead engine As long line tension maintained single-engine performances will satisfactory outboard engine quits first line tension no problem inboard engine quits first outboard engine will maintain line tension has proper side-thrust shown plans speed/performance Derringer directly related engine-propeller combinations model seems too fast experiment shorter-diameter lesser-pitch propellers Cox makes nice three-blade prop works well looks great rubber spinner combination nice electric starter starter eliminates problem engine running backwards Pick calm day test flights enter new stage aeromodeling reed about Model ing advertisers mention FF Indoor/Tenny Continued page 58 too steady Photo 4 close-up adjustable support tail boom curved top support works well both built-up rolled tail booms height adjustment simple tissue socket round peg about twice diameter normally use wing posts Photo 5 close-up parallel bar support construction wire post anchored base drilling hole through base using epoxy tie wire base square reinforcement block base 3/16-in x 1 -in balsa vertical wire 1/16-in music wire Just above base Photo 4 parallel bar bar itself made 1/16-in x 1-in balsa black sliding tube neoprene fuel tubing neoprene tubing fastened bar two pieces wire bent U shape pressed through bar wires fastened bar back dabs epoxy wires can pinched together somewhat needlenose pliers adjust easly bar slides wire post Model assembly follow certain proce dure assembling Indoor model possible assure best possible alignment finished model fixtures discussed above similar setup will work very well example once motor stick has assembled braced desired next logical step attach tall boom Fasten motor stick cradle shown Photo 3 take special pains stick rotated thrust bearing exactly vertical use offset bearing vertical model completely assembled necessary sure thrust bearing makes proper angie vertical Once alignment motor stick complete mate tail boom rear motor stick Presumably will some means make motor stick support front boom such balsa sleeve reinforces stick/boom junction Support rear boom adjustable stand sight along stick/boom combination front rear boom offset torn carefully adjust stands position until correct angle achieved Some us eyeball adjustment better measure offset reference straightedge possible No glue yet Once boom alignment correct horizontal plane measure distance top boom front rear boom Most builders make boom tilt up toward rear stabilizer has small amount negative incidence respect centerline motor stick usually makes easier get proper wing incidence during test flying results having both wing r s CAP YOUR CLUB LOGO Great NC CIubsI I Low Minimum Reasonable Prices I I Good Service InquireCall Write cuatomEl printed TEE TOP DOG TS too 4730 SW 75th Ave 4jJyf Miami FL 33155 1305 261 7768 1 BLAINES PLANES & R/C Box 109A Rt 1 Fremont IN 46737 May 1981 123 Let Know Members Arel PRA CT/CE AEROBA TICS ON PENNIES INSTEAD OF DOLLARS INTRODUCING THE MISER FOR 1981 R/C SPORT FLYER DELUXE Four channel radio mixer required flaperons Stable smooth flying characteristics Responds like controline aerobatic model Youll love MISER ECONOMY plus PERFORMANCE - plus STYLE-on 15 Eng 15- 25 Max Chord 13 Wing Area 385 sq Symmetrical Wing Span 36 Length 36 Kit $3995 Plans $500 Shipped prepaid USA No handling charge Order exclusively from
Edition: Model Aviation - 1981/05
Page Numbers: 52, 53, 54, 121, 122, 123
Clarence Haught DEDflZNGE~ IN THE EARLY years aviation flights terminated due engine failure Pioneers quick realize safety fac tor multiple engines Weight maneuverabil ity costs limiting factors however Single-engine aircraft continued dominate private small business aviation until advent so-called Ught twins introduced 195 Os Since time have multitude small twin-engine aircraft offered least push-pull engine arrangement four-engine version Cessna Most de signed carry minimum five people upwards dozen Derringer served inspiration pseudo-scale model deemed some ultimate sport/business twin uniquely designed two people design provides combination twin-engine safety pure fun multi-engine flight Full-size multi-engine aircraft arent ones fun fly After mastering basic Control Line flying skills addition 52 Model Aviation 1-rom oouomsioecan oeseen nowinemain ianoinggearwiresiipsiflto hole plywood nacelle bottom secured standard nylon landing gear clamps Retain wheels soldered washers wheel collars nose gear gouno wiin snreao woou oowel gluea hole nose/doubler Note firewall angle provide side-thrust outward engine Side-thrust must outboard engine Derringer two-place light twin general aviation market present Design sleek sporty demanding modern paint scheme Models control outlines made automotive trim tape Entire f angled provide line tension flight Forward-projecting nose gear saves props rough landings Model great introduction multi flight Long something different CL sport model twin mild 1/2A5 may just ticket Idea first venture multi-engines second power plant adds new excitement modeling First neat sound two engines working unison theres challenge maintaining flight engine fuel exhausted engine before other finally joy having something bit different flying field son have enjoyed multi-engine Control Line years beginning old converted-to-twin Ambroid Whipsaw DC-3 110 Bell X-P twin pusher finally Derringer Derringer intended first venture world multi-engine Control Line flight has designed ease construction important accurate alignment components [he basic model constructed right over plan pinned building board until final stages construction Any modeler has completed two kits has mastered basic flying engine operating skills should ready Derringer Begin construction wing width chord wing designed utilize 4-in May 1981 53 Nose doublers Vs-in balsa add strength fuselage-wing joint Engines side-mounsca oniy tor sake appearanceimproves sideimprove models appearance Engine nacelles built-up ensure view profile Rotate tank keep filler/vents needle valve vertical good glue bond add rigidity thereby reducing vibration sure fuel intake inside tank points outside circle FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 ALL WOOO IS BALSA EAW AS ROOTS ~wALct1KLJahL 7 TLOS OR CLOTS SPACESOFFSET LS SOEST ORAP TO ISOcoo ossBALaNcE AROSERELO SARE STVMeWSEASTS/S ROEET cr 5S 015 /SS SO REEL I-ES El S/S EA o EEILCOAAO I/WI SIWIm S REET SRJCE SIS V SA TE aESORWI NAVEL RRAO IRA 1VR ROEET ARROWS III LISRESC WIRE LSAESSC RFE 0 5/rAAORO WEE III I-SIR ROWE OR LI/S STEELS IV COA VOSTROL SOON SLERMAO 13 REARER SRAVSTSROOEV IA LA EIS/RTS BALSAOSELA IS/EOS/STEOTOVOVSSLE VSO LS SALSAR 55 LV VELTSA4SALSAO OSLO LI ILSOSEOLSAOSSLC OUR/WI OAEALSAA SALC II/SOYEALOAXRALC II LROASALSAVSSLC I111111/ w IIr4SCI ft4ZLLLIL-~VL IL--4ItIIIf IIIIIIII ~zIz1VErir 11r ILRV400JVL- IV i7------4A------4--------- ft1-TZ04Ii 1 TfII Z77VI ITlit IIIIIIII OW WEASYTAL LA 01/4AIR S SS S/A SOUSA ER LOLOHA EOVELOVE VETS IK~I/SO S Al ThE DERRINGER IRA TISSN AEWOSPO ASO SCALP ST CE AVOROT ORASCO AT 0 OAAAOT ss 5055 sheet allowing trimming obtain straight edges compensating top sheets slightly greater width requirement due airfoil curvature 4-in sheet unavailable join narrower strips edge-to-edge will probably require truing up using straightedge good way join sheets tape together side masking tape flat bench fold back open up joint glue applied laid bench tape-side down held place weights until dry fit sheet Nylon control horn moves one-piece elevator Soldered washer retains pushrod least control sensivity pushrod goes Outer hole edges very good new cyanoacrylate glues will speed things up Remove tape dry Tack plan building board cover plastic kitchen wrap Study plan care fully before beginning construction wing internal details will obscured during construc tion Because rib locations shown outside component outlines Pin trimmed bottom wing sheet down over plan glue place eading edge 3/16 red trailing-edge stock Vs spars Cut out 22 ribs Vs sheet Mark drill ribs have leadout wires running through Glue ribs place Add top spar 1 / 16 vertical webbing between spars Out third rib tip Bind solder leadout wires 2-in bellcrank bolt bellcrank 3/32 plywood mount Secure mounting nut drop epoxy glue prevent its loosening due vibration Install 1/16-in music wire pushrod bellcrank install complete assembly wingthreading leadout wires through pre-drilled holes ribs Add /2-oz weight 4 pennies outboard wing tip glue securely Carefully trim top sheeting proper width glue place securing pins weights rubberbands An inch-thick stack magazines works well Make wing tips scrap balsa Drill leadout holes left tip line brass nylon tubing Glue place completely dry remove wing board shape leading edges wing tips Sand thoroughly Rough-out two fuselage parts t Continued page 121 Rear view Derringer shows general layout also reveals high aspect-ratio wing Model constructed aligned right over plan After removal fuselage bottom nacelles capped completing structure System assures accurate alignment 54 Model Aviation 1 S/WI BALSA S/TA VS RROSS IL about 3000 rpm ringed version seen Nationals enough horsepower compete nowdominant Fox 36 John also mentioned soon-to-be-released FAT 15 designed FAT Combat Competitive horsepower lower nitro ease handling promise make engine very popular youre after ounce power rd recommend Nelson 15s will available June Fox 36 appears work better new venturi arrangement liner shim shim liner up flying Fast Combat take shim out Slow need midrange punch pulling heavier planes suction Naturally have move head compensate new venturi also improve ment partly because better fit partly having spraybar moved outboard some whatit helps keeping engine running over-lean end tank Tanks have bunch last issue no hit streets received UPS shipment Randys Model Aeronautics 515 Coleman Blvd Mt Pleasant SC 29464 must dozen different types tanks test Randys tanks basically familiar Dons tanks know Theyre really well made some come uniflow venting have good solder joints wash out real well gas burner stove just itching get since through Regionals can now get down testing some samples people have sent about Craig Cervos cheap alternative commercial tanksCarnation milk cans Somebody sent sample has vents pickup lines know what theyre it minute its almost April 1st Charlie Johnsoz 3716 Ingraham St San Diego CA 92109 Derringer/H aught Continued page 54 glue together seam line dry complete shaping Wrap sandpaper over top wing use wing sanding block finish wing saddle fuselage best accomplished wing secured bench moving fuselage back forth sideways over sandpaper Fabri cate engine nacelle sides fuselage nose doublers similar manner Cut out shape stabilizer elevators t Elevators may joined stabilizer time using three favorite hinges Join shape rudder parts Begin final assembly pinning wing stabilizer place over plan Glue fuselage position being sure perpendicular plan check square small triangle Sand rear edges fuselage doublers shape glue place Install engine nacelle sides 1/16 sheet over top careful cover over pins securing structure building board Glue rudder place offsetting leading edge left looking rear sure vertical checking square Allow dry thoroughly remove building board Cut engine nacelle bottoms 3/32 plywood Note small blocks receive landing gear wires may solid hardwood laminated scraps plywood edges nacelle bottoms should beveled except leading edge Glue place under wing nacelle sides Install re strip fuselage bottom doublers Note angle firewalls sand nacelles angle inboard engine may left Don McCarthy Ace Aero Sport Cannon Cirrus Kraft World Engines EK Logictrol Micro Avionics Pro Line Orbit Mathes MRC * RS Systems Royal Simprop Jerobee ALSO WARRANTY SERVICE QUALITY SER VICE FOR ALL BRANDS Z Factory trained technicians over 15 years Radio Control Electronics HOURS Cloged Sun & Mon lOam-B pmWedFri 10 am6 pm Sat 10 am-2 pm 714 639-8886 941 N MAIN ST ORANGE CALIFORNIA 92667 0 May1981 121 \uthorizec FACTORY AUTHORIZED SER VICE QdiO FOR ALL OF THE FOLLOWING BRA NDS QontroI ervice DO 110___ TWENTY-SEVENTH N UAL RADIO CONTROL EXPOSITION DO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 1011 &12 1981 FRIDAY 9am-6pm SATURDAY 9am-6pm SUNDAY gam-43OPm I presented WEAK SIGNALS R/C CLUB 20 BOX 5772 TOLEDO OHIO 43613 NO NONSENSE BALSA STRIPPERS NU Strips Balsa FUZZ Freew/out Adjustments Small $10 00 Large shown $20 00 Please add $1 00 postage PNut Kits GEE BEE shown $600 please ad 51 00 postagE Catalog 75 Miniature Replicas See uealer uruer GENE DUBOIS1 P0 Box Acushnet MA 02743 ...DEALER INQUIRIES INVITED P 0 BOX 2496 MA PES aUEKf-w7aIeS LA MEaA CALIF 92041 PHONE 714 44e8e75 714 442-4636 straight desired angle shown outboard engine important maintain line tension inboard engine quits first flight Firewalls made laminating two pieces 3/32 plywood using single piece plywood Glue securely epoxy Bend landing gear parts 3/32-in music wire Bind nose gear wire piece Ys dowel heavy thread fine wire Drill hole fuselage accept nose gear best accomplished piece sharpened brass tubingrather drill bitto avoid acciden tai splitting chipping Coat assembly epoxy glue push place Give model final sanding proceed favorite finish would suggest traditional fuel-proof dope Fill imperfections plastic balsa Give complete model two coats clear dope sanding lightly after coat Apply coat commerciai sanding sealer make own adding talcum powder clear dope until consistency cream Sandthis coat aimost completely away leaving filler wood grain Add two coats clear should now have good base color finish Brush preferably spray couple coats basic color Dope sold aerosol cans works great small model like Let basic finish dry couple days before adding trim Trim may either painted using masking tape may simply apply some new plastic trim tapes trimming dope use brush avoid necessity masking entire model paint trim sure seal edges masking tape clear dope prevents paint seeping under tape spoiling job used striping tape control surface outlines coat paste wax will protect trim tapes model now ready final touches Install main landing gear wires securing nylon straps screws Secure wheels collars soldered washers Bolt nylon control horn elevator hook up pushrod Check control movement Place control rod outer holes elevator horn reduce control sensitivity Form loops leadout wires bind copper wire solder Attach engines firewalls * 3 x i screws englnes mounted upright remove tanks place fuel feed lines toward outside flight circle reinstail tanks filler tubes vertical Install 6-in propellers 3-in pitch origlnal model powered Cox Baby Bee englnes Golden Bees work fine glve longer flights McCoy 049 engines should work equally well Cox Black Widow englnes would probably put out little too much power Check baiance point shown plan try fly slightly tail-heavy airplane will very sensitive difficult control slightly nose-heavy model safe fly will sluggish Add ballast necessary bring model balance Tail weight may epoxied fuselage side under stabilizer Nose weight best inserted hole nose doublers cut sharpened piece brass tubing Flying Derringer much like flying other model few precautions differences need consider First foremost never fly anything metal lines Fabric lines used sport flying will hold twin Size 008-in multistrand 35-ft ideal Fuel prime both englnes before starting INTRODUCING THE NEW RAPIER Control functions ailerons elevators rudder throttle All-balsa construction Instruction manual step-by-step building Kit includes die-cut balsa pre-shaped parts hardwoodplywood landing gear hardware Introductory price INNOVATION IN MODELINI 2657 N E 1881h SIreel $OIi95 Miami Florida 33180 Telephone 935-1436 122 Model Aviation KWH 13 ii LACEY M-1O 11 PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M19 ANDRESONDRUINE C0APLETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND PLANS FOR RUBBER POWERED MODELS w ILGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience EE Fu 1925 E Creighton Road NNIRJI modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control VISA Line Pensacola FL 32504 904/478-6745 first engine Use fuel bulb some other system top-off both tanks engines runningjust before releasing model Start inboard engine first will reaching over running engine starting second Tune engines just under peak rpm sure both engines running right direction checking breeze off prop Keep rag handy toss prop stop engines need arises basic concern multi-engine flight airplanes behavior dead engine As long line tension maintained single-engine performances will satisfactory outboard engine quits first line tension no problem inboard engine quits first outboard engine will maintain line tension has proper side-thrust shown plans speed/performance Derringer directly related engine-propeller combinations model seems too fast experiment shorter-diameter lesser-pitch propellers Cox makes nice three-blade prop works well looks great rubber spinner combination nice electric starter starter eliminates problem engine running backwards Pick calm day test flights enter new stage aeromodeling reed about Model ing advertisers mention FF Indoor/Tenny Continued page 58 too steady Photo 4 close-up adjustable support tail boom curved top support works well both built-up rolled tail booms height adjustment simple tissue socket round peg about twice diameter normally use wing posts Photo 5 close-up parallel bar support construction wire post anchored base drilling hole through base using epoxy tie wire base square reinforcement block base 3/16-in x 1 -in balsa vertical wire 1/16-in music wire Just above base Photo 4 parallel bar bar itself made 1/16-in x 1-in balsa black sliding tube neoprene fuel tubing neoprene tubing fastened bar two pieces wire bent U shape pressed through bar wires fastened bar back dabs epoxy wires can pinched together somewhat needlenose pliers adjust easly bar slides wire post Model assembly follow certain proce dure assembling Indoor model possible assure best possible alignment finished model fixtures discussed above similar setup will work very well example once motor stick has assembled braced desired next logical step attach tall boom Fasten motor stick cradle shown Photo 3 take special pains stick rotated thrust bearing exactly vertical use offset bearing vertical model completely assembled necessary sure thrust bearing makes proper angie vertical Once alignment motor stick complete mate tail boom rear motor stick Presumably will some means make motor stick support front boom such balsa sleeve reinforces stick/boom junction Support rear boom adjustable stand sight along stick/boom combination front rear boom offset torn carefully adjust stands position until correct angle achieved Some us eyeball adjustment better measure offset reference straightedge possible No glue yet Once boom alignment correct horizontal plane measure distance top boom front rear boom Most builders make boom tilt up toward rear stabilizer has small amount negative incidence respect centerline motor stick usually makes easier get proper wing incidence during test flying results having both wing r s CAP YOUR CLUB LOGO Great NC CIubsI I Low Minimum Reasonable Prices I I Good Service InquireCall Write cuatomEl printed TEE TOP DOG TS too 4730 SW 75th Ave 4jJyf Miami FL 33155 1305 261 7768 1 BLAINES PLANES & R/C Box 109A Rt 1 Fremont IN 46737 May 1981 123 Let Know Members Arel PRA CT/CE AEROBA TICS ON PENNIES INSTEAD OF DOLLARS INTRODUCING THE MISER FOR 1981 R/C SPORT FLYER DELUXE Four channel radio mixer required flaperons Stable smooth flying characteristics Responds like controline aerobatic model Youll love MISER ECONOMY plus PERFORMANCE - plus STYLE-on 15 Eng 15- 25 Max Chord 13 Wing Area 385 sq Symmetrical Wing Span 36 Length 36 Kit $3995 Plans $500 Shipped prepaid USA No handling charge Order exclusively from