Radio Control SCALE Bob & Dolly Wischer IMPROVING OLD MODELS ancient Douglas Mailpiane before its retirement new AMA museum flying bet ter time during its 13-year life important difference flight handling came about old four-wire servos replaced new three-wire Royal Titans never regarded older servos being less reliable operation proof improvement comparison tween flights before after change Most pronounced improvement new-found ability fly hands off transmitter controls extended periods result positive servocentering greater torque output Most noticeable change improvement aileron response Four very large ailerons could now moved centered 38 in-oz torque positive return neutral Douglas went museum its servos installed 12-year-old Emeraude replace old heavy fourwire types used since model new Improvement perfor mance revelation model became much active responsive control inputs Once set up straight-and-level would become fly-away something wasnt done bring back An additional benefit decrease model weight Titans servos mounted considerable distance behind center gravity change servos actu ally moved CG forward pronounced increase stability model will perform tailspins snap rolls command inadvertent snap roll slow speed now absent Emeraude may now bit nose-heavy preferred condition now requires lot less attention airborne downright relaxing fly Improvement Emeraudes flight aroused curiosity what would happen newer servos used 15-year-old Sopwith 1 V2 Strutter large airplane 1100 sq wing area quite light 6/2 lb reasoned highertorque servos wouldnt necessary Ban- tam Midgets installed some Jim PepInos 83 Nats entry upermarinC Spitfire Mk-16 originated Pica kit Perfect Paint used finish Kraft 61-powered Sport Scale WW II fighter Jim proprietor Scale Plan Photo Service Greensboro NC could used advantage Most surprising amount pilot effort get scalelike flight considerably reduced old four-wire servos may serviceable throttle rudder However preference aileron elevator applications active positive-centering threedoubt about ability 18 in-oz servo move four large ailerons proved no problem aileron response posi tive speeds change servos already lightweight Sopwith lost other half-pound first time models true potential aerobatic aircraft SR MAIAI Aiitirr1 Fred Menna modified Mick Heeves kit produce fine Hawker Hurricane flew 83 Nats Sport Scale ship uses 05 90 has Aero Gloss over silkapan weighs 1475 lb Stanley Jonutis prepares Spinks Akromaster built Pilot kit Sport Scale static judging 83 Nats aerobatic 7-lb 60-in-span model covered MonoKote uses Kraft 61 engine Akromaster prototype now EAA U.m nt Ohknmh WI wire servos obtain realistic flight has always some question servo torque necessary control heavy fast models Giant Scale doubts arise because know experi ence large excursions control surface travel required low airspeeds less travel speed increases Its quite possible small servo low torque may able move control surface fast-moving airstream reality its never expected accomplish task Transmitter controls moved greater dis tance model speeds near stall much less model cruising speed minimize weight Douglas A-20 twin Ace Bantam Midget servos used model rather large heavy 79-in span 14 lb pair 40 engines its airspeed very high Ailerons very sensitive speeds good indi cation tiny servos doing job undue strain Keep old models flying models mentioned earlier have actually im proved age though accidents have put out service temporarily Sopwith has strained through trees along runway Rhinebeck Em eraude encounter tree Tou louse France Mailpiane once scat tered itself over large area flying field Kitchener-Waterloo Scale Rally survived restored usefulness went win contests Restoration crashed airplane demands much less time starting scratch contrary common beliefs modelers topquality Scale model particular may have thousand hours construction time shouldnt scrapped willingly sport plane assembled several weeks Invest ment time Scale model too great written-off hastily also vestment documentation special parts Continued page 136 POWER * PERFORNNANCE * PRECISION TAIPAN PROPS Outperformed others extensive bench field tests Absolutely true helical pitch boss tip No flexing power loss vibration Glass-filled plastic Made Australia SIZERETAILCONDOR10-PACK 7 x 4075049450 7 x 6075049450 8x4085055510 8x6085055510 9 x 4105069630 9 x 6105069630 lOx 4125080750 10x6125080750 lix 5150097900 11 x 7150097900 Rfloolor Con Eohoe Hog 4 BInd 8o. Hol,ROtInlo con Shop mail phone Visit CONDOR HOBBIES SHOWROOM 17971 Skypark Circle Suite D Irvine California 92714 714 261-5132 250-1425 Hours Monday thru Friday 900 700 Open Saturdays 1000 500 TELE TACHOMETER NEWl Digicon TT-01 Tele Tachometer first time can read engine mm and/or airspeed tually flight No guesr Nnw lIohlI knpno odo kop prop plug fuel giving CdS sen sors coupled subminiature air borne TX send data handheld unit Accurate rpm 30k airspeed 300 Km/h Audible stall warning RDF traces lost aircraft Reg $18495 Condor $14995 TUNED PIPES ARE FUSSY COMPLICATED & EXPENSIVE RIGHT NOT ANYMOREl unique slide valve design lets tune engine its peak power ght nowl Right field Just warm-up slide adjusting wire highest rpm see instructions tighten lock screw bore holes sky Youll love wide powerband uncritical -.....needle setting extra power Clarence Lee picked up F1quick 1000 rpm first bench run K&B report gains 700 1500 rpm ious competi 65 FR Formula 500 reference engine Most novices tors size handles engines 25 go CONDOR discounts headers youll Handling Charges onneed side exhaust engines SPECS dia Prepaid Orders $250stainless steel tubing 20% overall length 5 oz wt COD Orders Credit Cards $475 Sugg Retail $2996/Condor just $2450 March 1984 47 Heres small Sport Scale Boeing B29A scratchbuilt F J Gonzalez Four OS 25 engines power l9Vsib 126in wingspan WW ii bomber First place Military Scale class Chicago Expo won Ruth Curtis Fokker 0-ViI Its finish silk Aero Gloss dope Power K&B 61 PEAK POWER PIPELook 10011 Adloen,, Shd LJ~U POWRZOOM winch serious flyer demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplane ijchoose speed select pulleys j% launcha minute flights use companion RETRIEVER $250 Electrics/Kopski Continued page 133 Im convinced both planes good candidate designs Electric structures must beefed up lightness Personally felt terrible because somehow failed convey importance lightweight flying friendnot once twice Being determined stal wart modeler now off finishing two electric-powered Old-Timers Buzzard Bombshell Playboy Remember what said earlier series suggest thinking terms quarter ouncesfour make up ounce four make up quarter pounder Playboy Old-Timer Vital Statistics Wing styleElliptical tips Wingspan68 Wing chord constant9/2 Wing area planform576 sq DihedralPoly Wing frame weight4 Oz DAVE V SYSTEMS CORPOR ION ONE WOOD LANE MALVERNPA19355 215644-0692 Write call information Wing weight covered6 oz AirfoilUndercambered Tail assemblyBuilt-up Tail weight covered11/2 OZ Fuselage construction uilt-up stick Fuselage weight covered 31/3 OZ RadioThree channels used Controls .. RudElev ON/OFF Mot Radio battery250 mAh Radio weight6/2 OZ Motor batterySix 12 Ah cells Motor controlMicroswitch Battery weight12 oz MotorLeisure LT-50 DriveLeisure 251 gear Prop10-6 11-6 Mot gear prop weight7/2 Oz Misc weightApprox1 2 oz Total plane weight41 oz Power system weight20 oz Wing loading1O/4oz/sq ft need new timers fly like plane second installment Planes Flying next month 11 look some ways build strong lightweight model structures Therell some rules thumb will help maximize Electric achievementand some thoughts what plane choose Meanwhile please direct comments questions SASE author Bob Kopski 25 West End Dr Lansdale PA 19446 RC Scale/Wischers Continued oaoe 47 made exclusively model cant used another plane Too much lost model isnt rebuilt large investment time money normal Scale modeling makes sense expend effort direction preservation No 1 admonition make certain good battery life before flying session since batteries common source problems lead air plane damage Cyclers have place arent really insurance against failure much inclined rely upon expanded-scale voltmeter resistance load quick battery check first time voltmeter needle drops sud denly doesnt come up proper level good Scale model will have saved possible destruction next flight Overworked receiver cells carrying load swarm servos subject vibration weak link RC sys tem Using larger-capacity cells isnt solu tion because dead cell drops voltage below requirements Larger cells per mit flights larger servos 18 Scale airplanes nine flown regu larly have same charging jack sake convenience Deans-type socket switch wiring harness Plug ging meter simple matter leaves no excuse omitting check same meter can used checking trans mitter batteries peace mind alone its worth $16 price Tower Hobbies Second importance models bal ance point Tail-heavy models can flown incidence angles wing stabilizer properly set up burden controlling such unstable beast too great experienced fliers nose-heavy model may WING SPAN4 WING AREA198 51 ENGINE15 WEIGHT34 IS Babe body loan wing sheeting die Cut formert rolled planS 2 nSf. 15 HIGHLY AEROBATIC DESIGNED Weller Nu Dentouk Jr PEPPERMINT PATTIE 15 STINGER II CMASTER KJT Div BAR/RICH SALES CO 2 FAIRWAY-HANNIBAL M0834G1314/221 8853 WING SPAN 30 WING AREABOA sqin ENGINE45 EIGHT5s balsa unstractiOn die Cut lornCrs ribs 2shts InlI Claw plans Good ground Seedling gaelIc lending good first bipe FU LLY AEROB ATIC NEW R/C BOOKLET Answers questions often asked want get started R/C flying PLUS troduces best airplane start GOLDEN FALCON receive Copy ____________ SEND $200 TO ST CROIX OF PARK FALLS LTD PO Box 279P Park Falls WI 54552 136 Model Aviation batter inc1d * plus shipping BUILDS WING STAB & FUSE gz CHOICE OF MODELERS flTHEWORLDOVER Standard-o Full House Wing Jig $69~ Fuse iI$~o Wing & Fuse $79 Jig 4justojig CoR R Box 673Noblenville Indiana 46060317 877-2223 Whether consider yourself novice oran expert model builder A-Justo Jig will improve aircraft construc tion e valuable time bargain A-Justo-Jig holds major com ponents proper alignment entire unit will rotate 36O permit fit glue plank shape sand con venient position No messy glu ing over plans waiting dry before beginning opposite side A-Justo-Jig will adjust rib former spacing lets build-in wing dihedral strong warp-free construction TO USE simple template rib indexing tool included locate drill holes rib alignment rods easy preparation takes approx 15 minutes average wing A-Justo-Jig builds em better Ask favorite hobby dealer Youll glad did arantee non-aerobatic its stability will keep out trouble dreaded inadvertent stall-and-snap-roll Its true adding weight nose merely increases total model weight thereby raising wing loading stall speed model may never fly properly safely After rebuilding crashed airplane find almost invariably balance point has shifted aft due extra few coats paint bit added plywood re inforcement happened recently restoration crashed Ryan SCW now has 12 oz lead cowl fastened far forward possible Perfor mance hasnt suffered too badly landing speed isnt perceptibly higher may need weight because aircraft has long tail short nose other words resist temptation lavish extra finishing coats long tail Another important consideration long-lived model provide convenient means adjusting engines needle valve needle cant adjusted leads temptation fly isnt set optimum point reliable fuel feed flight attitudes heavy Scale model needs full engine output climb may suf fer early return earth power sags due lean setting Fully-cowled en gines vulnerable dont like poke hole through cowl con spicuous location make needle acces sible As consequence engine runs hot because needle cant moved richer setting closed cowl may con tribute heat build-up because poor air circulation unhappy combination could lead short life both engine air plane fuel tank too low fuselage can also contribute overheatingusually late flight level fuel drops causing mixture become lean Muffler pressure tank Robart Pumper may answer After accident have made prac tice retrieving broken piece crashed airplane disagree able tasks modeling experience helps have assistant someone will resist immediate inclination burn remains Quite often parts can re assembled like giant jigsaw puzzle glue joint stronger surrounding balsa Wing spars longerons may need thin plywood gussets reinforcement Ex ternal cracks can filled spackling compound Hobbypoxy Stuff become invisible after sanding re finishing Some weight added pro cess least several ounces averagesize plane balsa may pieced together plywood portions such bulk heads need completely replaced Rebuilding wreck may actually ideal opportunity make improvements though old plane has already thoroughly de-bugged may become evi dent certain balsa parts overstressed should replaced ply wood rough rule-of-thumb says plywood having one-fourth thickness balsa part will have equal weight twice strength example V4-in balsa Continued page 140 March 1984 137 DONT WANT -m HOLD l1 ThIS TIME RALN Perma-Grit TM Lifetime * Tungsten Carbide grit hardest material next diamondl * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knite rasp & sanding blocks excellent tools modeler can use Don Lowe Pro tessional Engineer Ask Dealer send check MO No CODs DG Products 209 Carrlands Dr Dayton OH 45429 513 294-1192 RC Scale/Wischers Continued page 137 piece could replaced /16-in ply no sacrifice weight gain strength Landing gears certainly subject abuse damage minor accident After first landing mishap time has come increase strength example brass-tube struts can changed steel Brass may quickly accessible hardware stores hobby shops steel has longer life high stress applications Air craft steel tubing other hand doesnt telescope successive sizes brass tube bit harder find airports air craft supply dealers worthwhile search better material Aluminum tubing can used single-strut-type land ing gears provided alloy pure aluminum soft aluminum tubing sold hardware stores less satisfactory brass unless very heavy wall thicknesses used Preferred aluminum tube 2024-T3 alloy 6061-T6 second choice proper choice wall thicknesses aluminum tubes will telescope Local steel supply houses carry alloy aluminum tubes First flights after major repair very similar very first new model mixed feelings anticipation apprehension goes well usual case elation follows Resurrection model unsightly mess pro vides satisfaction equal completion Paul Clements Presents BEAUTIFUL 84A&6 AWARD-WINNING COMPETITOR AMA 5 FAI PATTERN DESIGN \ gsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made IJSA Average Modelers Use F100Flat Coarse/Fine$695 F-101 Flat Fine$695 F-102Flat Course$695 R-200 Redius Course/Fine$695 1201 Tangent Coerse/Fine$695 E202RoundCourse/Fine$625 R-203 1/2 Hound Coarse/fine$495 1204 t/a Round Course/Fine$495 Postage Paid Oho residents add 6% tax new aircraft Bob Dolly Wiseher S-221 Lapham Peak Rd Delafield WI 53018 RC Aerobatics/Van Putte Continued tram oaoe 49 gives off electromagnetic vibrations can occupy frequencies DC out through light frequencies radiations presented RC receivers antenna receivers RF circuits have some ability reject unwanted signals ability limited power levels vicinity design power level control transmitter presented stronger signals signals may overload receivers filters force way through set pro ducing interference extreme cases currents induced lightning can physical damage active parts circuit melting down transistors ICs punching holes low-voltage capacitors Whether happens depends primarily distance between RC receiver lightning bolt general see lightning bolts shouldnt flying Its easy deter electrical storm approach ing Any broadcast-band AM receiver will crackle sputter response lightning bolts tens miles away Hearing such noises should warning enough Gary Malchus Milford UT wrote have worked National Weather Ser Designed Manufactured Paul Clements KITTY IAWI MODELI RR 2 Pauli lAd 47454 Phone 812 7233601 WING SPAN ING AREA 704 sq inBasic Kit $9895 MOTOR u 0 Deluxe Kit $14995 WEIGHTs 9 lbs BASIC KIT INCLUDEs F5erglass fuselage bulkhead installed molded fin foam wing stab cores LG blocks wrres nose gearwire 4fiberglassfape plans instroofions DELUXE KIT INCLUDES aboon plas balsa Eardwoad fiberglass wing tips hinges fiberglass pass rods aileron linkage snap links tO straps screws wing bolts 005101 horns nose gear afeering arm 80 throffle linkage vice 28 years lightning thing have observed times Four years ago friend flying afternoon thunderstorm developed about three miles away flying QB 405 Aero Sport radio 72320 As mak ing high-speed flyby about 20 ft off ground bolt lightning hit about two miles away plane rolled over hit ground about 450 angle friend flying QB 205 Cirrus radio 72160 about 200 ft air flying straight level lightning hit airplane went spin about four rotations able re cover make landing no problems During latter part July early August get flow moist air off Gulf Mexico comes southwest Utah call monsoon season period two three weeks get thun derstorms almost afternoon 1982 during monsoon season numer ous glitches decided would no longer fly lightning within about eight miles flying 1 spent three days Reno NV during Aero Scale 82 afternoon thun derstorms would develop about 2 pm would lightning over place am convinced least three crashes due lightning area certainly sounds like Garys experience bears out Georges observations prob Continued page 144 Quality Wood Products Serious Modeler Send $1 br catalog Price applied tirst order Buckeye Balsa supplies AAA quality balsa certified aircraft plywood fine kits Aero Composites Curtis Model Aircraft Co Fliteglas Models Fourmost Products Kitty Hawk Models Dave Platt Precision Built Models RIC Kits Mfg VK Models Bob Dively Model Aircraft hobby shops Hobby Shop Orders Welcome 216 533 3607 P0 Box 174 Canfleld OH 44406 140 Model Aviation See dealer distributor available send check money order VISA MasterCdrd plus $700 UPS shipping to
Edition: Model Aviation - 1984/03
Page Numbers: 46, 47, 136, 137, 140
Radio Control SCALE Bob & Dolly Wischer IMPROVING OLD MODELS ancient Douglas Mailpiane before its retirement new AMA museum flying bet ter time during its 13-year life important difference flight handling came about old four-wire servos replaced new three-wire Royal Titans never regarded older servos being less reliable operation proof improvement comparison tween flights before after change Most pronounced improvement new-found ability fly hands off transmitter controls extended periods result positive servocentering greater torque output Most noticeable change improvement aileron response Four very large ailerons could now moved centered 38 in-oz torque positive return neutral Douglas went museum its servos installed 12-year-old Emeraude replace old heavy fourwire types used since model new Improvement perfor mance revelation model became much active responsive control inputs Once set up straight-and-level would become fly-away something wasnt done bring back An additional benefit decrease model weight Titans servos mounted considerable distance behind center gravity change servos actu ally moved CG forward pronounced increase stability model will perform tailspins snap rolls command inadvertent snap roll slow speed now absent Emeraude may now bit nose-heavy preferred condition now requires lot less attention airborne downright relaxing fly Improvement Emeraudes flight aroused curiosity what would happen newer servos used 15-year-old Sopwith 1 V2 Strutter large airplane 1100 sq wing area quite light 6/2 lb reasoned highertorque servos wouldnt necessary Ban- tam Midgets installed some Jim PepInos 83 Nats entry upermarinC Spitfire Mk-16 originated Pica kit Perfect Paint used finish Kraft 61-powered Sport Scale WW II fighter Jim proprietor Scale Plan Photo Service Greensboro NC could used advantage Most surprising amount pilot effort get scalelike flight considerably reduced old four-wire servos may serviceable throttle rudder However preference aileron elevator applications active positive-centering threedoubt about ability 18 in-oz servo move four large ailerons proved no problem aileron response posi tive speeds change servos already lightweight Sopwith lost other half-pound first time models true potential aerobatic aircraft SR MAIAI Aiitirr1 Fred Menna modified Mick Heeves kit produce fine Hawker Hurricane flew 83 Nats Sport Scale ship uses 05 90 has Aero Gloss over silkapan weighs 1475 lb Stanley Jonutis prepares Spinks Akromaster built Pilot kit Sport Scale static judging 83 Nats aerobatic 7-lb 60-in-span model covered MonoKote uses Kraft 61 engine Akromaster prototype now EAA U.m nt Ohknmh WI wire servos obtain realistic flight has always some question servo torque necessary control heavy fast models Giant Scale doubts arise because know experi ence large excursions control surface travel required low airspeeds less travel speed increases Its quite possible small servo low torque may able move control surface fast-moving airstream reality its never expected accomplish task Transmitter controls moved greater dis tance model speeds near stall much less model cruising speed minimize weight Douglas A-20 twin Ace Bantam Midget servos used model rather large heavy 79-in span 14 lb pair 40 engines its airspeed very high Ailerons very sensitive speeds good indi cation tiny servos doing job undue strain Keep old models flying models mentioned earlier have actually im proved age though accidents have put out service temporarily Sopwith has strained through trees along runway Rhinebeck Em eraude encounter tree Tou louse France Mailpiane once scat tered itself over large area flying field Kitchener-Waterloo Scale Rally survived restored usefulness went win contests Restoration crashed airplane demands much less time starting scratch contrary common beliefs modelers topquality Scale model particular may have thousand hours construction time shouldnt scrapped willingly sport plane assembled several weeks Invest ment time Scale model too great written-off hastily also vestment documentation special parts Continued page 136 POWER * PERFORNNANCE * PRECISION TAIPAN PROPS Outperformed others extensive bench field tests Absolutely true helical pitch boss tip No flexing power loss vibration Glass-filled plastic Made Australia SIZERETAILCONDOR10-PACK 7 x 4075049450 7 x 6075049450 8x4085055510 8x6085055510 9 x 4105069630 9 x 6105069630 lOx 4125080750 10x6125080750 lix 5150097900 11 x 7150097900 Rfloolor Con Eohoe Hog 4 BInd 8o. Hol,ROtInlo con Shop mail phone Visit CONDOR HOBBIES SHOWROOM 17971 Skypark Circle Suite D Irvine California 92714 714 261-5132 250-1425 Hours Monday thru Friday 900 700 Open Saturdays 1000 500 TELE TACHOMETER NEWl Digicon TT-01 Tele Tachometer first time can read engine mm and/or airspeed tually flight No guesr Nnw lIohlI knpno odo kop prop plug fuel giving CdS sen sors coupled subminiature air borne TX send data handheld unit Accurate rpm 30k airspeed 300 Km/h Audible stall warning RDF traces lost aircraft Reg $18495 Condor $14995 TUNED PIPES ARE FUSSY COMPLICATED & EXPENSIVE RIGHT NOT ANYMOREl unique slide valve design lets tune engine its peak power ght nowl Right field Just warm-up slide adjusting wire highest rpm see instructions tighten lock screw bore holes sky Youll love wide powerband uncritical -.....needle setting extra power Clarence Lee picked up F1quick 1000 rpm first bench run K&B report gains 700 1500 rpm ious competi 65 FR Formula 500 reference engine Most novices tors size handles engines 25 go CONDOR discounts headers youll Handling Charges onneed side exhaust engines SPECS dia Prepaid Orders $250stainless steel tubing 20% overall length 5 oz wt COD Orders Credit Cards $475 Sugg Retail $2996/Condor just $2450 March 1984 47 Heres small Sport Scale Boeing B29A scratchbuilt F J Gonzalez Four OS 25 engines power l9Vsib 126in wingspan WW ii bomber First place Military Scale class Chicago Expo won Ruth Curtis Fokker 0-ViI Its finish silk Aero Gloss dope Power K&B 61 PEAK POWER PIPELook 10011 Adloen,, Shd LJ~U POWRZOOM winch serious flyer demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplane ijchoose speed select pulleys j% launcha minute flights use companion RETRIEVER $250 Electrics/Kopski Continued page 133 Im convinced both planes good candidate designs Electric structures must beefed up lightness Personally felt terrible because somehow failed convey importance lightweight flying friendnot once twice Being determined stal wart modeler now off finishing two electric-powered Old-Timers Buzzard Bombshell Playboy Remember what said earlier series suggest thinking terms quarter ouncesfour make up ounce four make up quarter pounder Playboy Old-Timer Vital Statistics Wing styleElliptical tips Wingspan68 Wing chord constant9/2 Wing area planform576 sq DihedralPoly Wing frame weight4 Oz DAVE V SYSTEMS CORPOR ION ONE WOOD LANE MALVERNPA19355 215644-0692 Write call information Wing weight covered6 oz AirfoilUndercambered Tail assemblyBuilt-up Tail weight covered11/2 OZ Fuselage construction uilt-up stick Fuselage weight covered 31/3 OZ RadioThree channels used Controls .. RudElev ON/OFF Mot Radio battery250 mAh Radio weight6/2 OZ Motor batterySix 12 Ah cells Motor controlMicroswitch Battery weight12 oz MotorLeisure LT-50 DriveLeisure 251 gear Prop10-6 11-6 Mot gear prop weight7/2 Oz Misc weightApprox1 2 oz Total plane weight41 oz Power system weight20 oz Wing loading1O/4oz/sq ft need new timers fly like plane second installment Planes Flying next month 11 look some ways build strong lightweight model structures Therell some rules thumb will help maximize Electric achievementand some thoughts what plane choose Meanwhile please direct comments questions SASE author Bob Kopski 25 West End Dr Lansdale PA 19446 RC Scale/Wischers Continued oaoe 47 made exclusively model cant used another plane Too much lost model isnt rebuilt large investment time money normal Scale modeling makes sense expend effort direction preservation No 1 admonition make certain good battery life before flying session since batteries common source problems lead air plane damage Cyclers have place arent really insurance against failure much inclined rely upon expanded-scale voltmeter resistance load quick battery check first time voltmeter needle drops sud denly doesnt come up proper level good Scale model will have saved possible destruction next flight Overworked receiver cells carrying load swarm servos subject vibration weak link RC sys tem Using larger-capacity cells isnt solu tion because dead cell drops voltage below requirements Larger cells per mit flights larger servos 18 Scale airplanes nine flown regu larly have same charging jack sake convenience Deans-type socket switch wiring harness Plug ging meter simple matter leaves no excuse omitting check same meter can used checking trans mitter batteries peace mind alone its worth $16 price Tower Hobbies Second importance models bal ance point Tail-heavy models can flown incidence angles wing stabilizer properly set up burden controlling such unstable beast too great experienced fliers nose-heavy model may WING SPAN4 WING AREA198 51 ENGINE15 WEIGHT34 IS Babe body loan wing sheeting die Cut formert rolled planS 2 nSf. 15 HIGHLY AEROBATIC DESIGNED Weller Nu Dentouk Jr PEPPERMINT PATTIE 15 STINGER II CMASTER KJT Div BAR/RICH SALES CO 2 FAIRWAY-HANNIBAL M0834G1314/221 8853 WING SPAN 30 WING AREABOA sqin ENGINE45 EIGHT5s balsa unstractiOn die Cut lornCrs ribs 2shts InlI Claw plans Good ground Seedling gaelIc lending good first bipe FU LLY AEROB ATIC NEW R/C BOOKLET Answers questions often asked want get started R/C flying PLUS troduces best airplane start GOLDEN FALCON receive Copy ____________ SEND $200 TO ST CROIX OF PARK FALLS LTD PO Box 279P Park Falls WI 54552 136 Model Aviation batter inc1d * plus shipping BUILDS WING STAB & FUSE gz CHOICE OF MODELERS flTHEWORLDOVER Standard-o Full House Wing Jig $69~ Fuse iI$~o Wing & Fuse $79 Jig 4justojig CoR R Box 673Noblenville Indiana 46060317 877-2223 Whether consider yourself novice oran expert model builder A-Justo Jig will improve aircraft construc tion e valuable time bargain A-Justo-Jig holds major com ponents proper alignment entire unit will rotate 36O permit fit glue plank shape sand con venient position No messy glu ing over plans waiting dry before beginning opposite side A-Justo-Jig will adjust rib former spacing lets build-in wing dihedral strong warp-free construction TO USE simple template rib indexing tool included locate drill holes rib alignment rods easy preparation takes approx 15 minutes average wing A-Justo-Jig builds em better Ask favorite hobby dealer Youll glad did arantee non-aerobatic its stability will keep out trouble dreaded inadvertent stall-and-snap-roll Its true adding weight nose merely increases total model weight thereby raising wing loading stall speed model may never fly properly safely After rebuilding crashed airplane find almost invariably balance point has shifted aft due extra few coats paint bit added plywood re inforcement happened recently restoration crashed Ryan SCW now has 12 oz lead cowl fastened far forward possible Perfor mance hasnt suffered too badly landing speed isnt perceptibly higher may need weight because aircraft has long tail short nose other words resist temptation lavish extra finishing coats long tail Another important consideration long-lived model provide convenient means adjusting engines needle valve needle cant adjusted leads temptation fly isnt set optimum point reliable fuel feed flight attitudes heavy Scale model needs full engine output climb may suf fer early return earth power sags due lean setting Fully-cowled en gines vulnerable dont like poke hole through cowl con spicuous location make needle acces sible As consequence engine runs hot because needle cant moved richer setting closed cowl may con tribute heat build-up because poor air circulation unhappy combination could lead short life both engine air plane fuel tank too low fuselage can also contribute overheatingusually late flight level fuel drops causing mixture become lean Muffler pressure tank Robart Pumper may answer After accident have made prac tice retrieving broken piece crashed airplane disagree able tasks modeling experience helps have assistant someone will resist immediate inclination burn remains Quite often parts can re assembled like giant jigsaw puzzle glue joint stronger surrounding balsa Wing spars longerons may need thin plywood gussets reinforcement Ex ternal cracks can filled spackling compound Hobbypoxy Stuff become invisible after sanding re finishing Some weight added pro cess least several ounces averagesize plane balsa may pieced together plywood portions such bulk heads need completely replaced Rebuilding wreck may actually ideal opportunity make improvements though old plane has already thoroughly de-bugged may become evi dent certain balsa parts overstressed should replaced ply wood rough rule-of-thumb says plywood having one-fourth thickness balsa part will have equal weight twice strength example V4-in balsa Continued page 140 March 1984 137 DONT WANT -m HOLD l1 ThIS TIME RALN Perma-Grit TM Lifetime * Tungsten Carbide grit hardest material next diamondl * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knite rasp & sanding blocks excellent tools modeler can use Don Lowe Pro tessional Engineer Ask Dealer send check MO No CODs DG Products 209 Carrlands Dr Dayton OH 45429 513 294-1192 RC Scale/Wischers Continued page 137 piece could replaced /16-in ply no sacrifice weight gain strength Landing gears certainly subject abuse damage minor accident After first landing mishap time has come increase strength example brass-tube struts can changed steel Brass may quickly accessible hardware stores hobby shops steel has longer life high stress applications Air craft steel tubing other hand doesnt telescope successive sizes brass tube bit harder find airports air craft supply dealers worthwhile search better material Aluminum tubing can used single-strut-type land ing gears provided alloy pure aluminum soft aluminum tubing sold hardware stores less satisfactory brass unless very heavy wall thicknesses used Preferred aluminum tube 2024-T3 alloy 6061-T6 second choice proper choice wall thicknesses aluminum tubes will telescope Local steel supply houses carry alloy aluminum tubes First flights after major repair very similar very first new model mixed feelings anticipation apprehension goes well usual case elation follows Resurrection model unsightly mess pro vides satisfaction equal completion Paul Clements Presents BEAUTIFUL 84A&6 AWARD-WINNING COMPETITOR AMA 5 FAI PATTERN DESIGN \ gsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made IJSA Average Modelers Use F100Flat Coarse/Fine$695 F-101 Flat Fine$695 F-102Flat Course$695 R-200 Redius Course/Fine$695 1201 Tangent Coerse/Fine$695 E202RoundCourse/Fine$625 R-203 1/2 Hound Coarse/fine$495 1204 t/a Round Course/Fine$495 Postage Paid Oho residents add 6% tax new aircraft Bob Dolly Wiseher S-221 Lapham Peak Rd Delafield WI 53018 RC Aerobatics/Van Putte Continued tram oaoe 49 gives off electromagnetic vibrations can occupy frequencies DC out through light frequencies radiations presented RC receivers antenna receivers RF circuits have some ability reject unwanted signals ability limited power levels vicinity design power level control transmitter presented stronger signals signals may overload receivers filters force way through set pro ducing interference extreme cases currents induced lightning can physical damage active parts circuit melting down transistors ICs punching holes low-voltage capacitors Whether happens depends primarily distance between RC receiver lightning bolt general see lightning bolts shouldnt flying Its easy deter electrical storm approach ing Any broadcast-band AM receiver will crackle sputter response lightning bolts tens miles away Hearing such noises should warning enough Gary Malchus Milford UT wrote have worked National Weather Ser Designed Manufactured Paul Clements KITTY IAWI MODELI RR 2 Pauli lAd 47454 Phone 812 7233601 WING SPAN ING AREA 704 sq inBasic Kit $9895 MOTOR u 0 Deluxe Kit $14995 WEIGHTs 9 lbs BASIC KIT INCLUDEs F5erglass fuselage bulkhead installed molded fin foam wing stab cores LG blocks wrres nose gearwire 4fiberglassfape plans instroofions DELUXE KIT INCLUDES aboon plas balsa Eardwoad fiberglass wing tips hinges fiberglass pass rods aileron linkage snap links tO straps screws wing bolts 005101 horns nose gear afeering arm 80 throffle linkage vice 28 years lightning thing have observed times Four years ago friend flying afternoon thunderstorm developed about three miles away flying QB 405 Aero Sport radio 72320 As mak ing high-speed flyby about 20 ft off ground bolt lightning hit about two miles away plane rolled over hit ground about 450 angle friend flying QB 205 Cirrus radio 72160 about 200 ft air flying straight level lightning hit airplane went spin about four rotations able re cover make landing no problems During latter part July early August get flow moist air off Gulf Mexico comes southwest Utah call monsoon season period two three weeks get thun derstorms almost afternoon 1982 during monsoon season numer ous glitches decided would no longer fly lightning within about eight miles flying 1 spent three days Reno NV during Aero Scale 82 afternoon thun derstorms would develop about 2 pm would lightning over place am convinced least three crashes due lightning area certainly sounds like Garys experience bears out Georges observations prob Continued page 144 Quality Wood Products Serious Modeler Send $1 br catalog Price applied tirst order Buckeye Balsa supplies AAA quality balsa certified aircraft plywood fine kits Aero Composites Curtis Model Aircraft Co Fliteglas Models Fourmost Products Kitty Hawk Models Dave Platt Precision Built Models RIC Kits Mfg VK Models Bob Dively Model Aircraft hobby shops Hobby Shop Orders Welcome 216 533 3607 P0 Box 174 Canfleld OH 44406 140 Model Aviation See dealer distributor available send check money order VISA MasterCdrd plus $700 UPS shipping to
Edition: Model Aviation - 1984/03
Page Numbers: 46, 47, 136, 137, 140
Radio Control SCALE Bob & Dolly Wischer IMPROVING OLD MODELS ancient Douglas Mailpiane before its retirement new AMA museum flying bet ter time during its 13-year life important difference flight handling came about old four-wire servos replaced new three-wire Royal Titans never regarded older servos being less reliable operation proof improvement comparison tween flights before after change Most pronounced improvement new-found ability fly hands off transmitter controls extended periods result positive servocentering greater torque output Most noticeable change improvement aileron response Four very large ailerons could now moved centered 38 in-oz torque positive return neutral Douglas went museum its servos installed 12-year-old Emeraude replace old heavy fourwire types used since model new Improvement perfor mance revelation model became much active responsive control inputs Once set up straight-and-level would become fly-away something wasnt done bring back An additional benefit decrease model weight Titans servos mounted considerable distance behind center gravity change servos actu ally moved CG forward pronounced increase stability model will perform tailspins snap rolls command inadvertent snap roll slow speed now absent Emeraude may now bit nose-heavy preferred condition now requires lot less attention airborne downright relaxing fly Improvement Emeraudes flight aroused curiosity what would happen newer servos used 15-year-old Sopwith 1 V2 Strutter large airplane 1100 sq wing area quite light 6/2 lb reasoned highertorque servos wouldnt necessary Ban- tam Midgets installed some Jim PepInos 83 Nats entry upermarinC Spitfire Mk-16 originated Pica kit Perfect Paint used finish Kraft 61-powered Sport Scale WW II fighter Jim proprietor Scale Plan Photo Service Greensboro NC could used advantage Most surprising amount pilot effort get scalelike flight considerably reduced old four-wire servos may serviceable throttle rudder However preference aileron elevator applications active positive-centering threedoubt about ability 18 in-oz servo move four large ailerons proved no problem aileron response posi tive speeds change servos already lightweight Sopwith lost other half-pound first time models true potential aerobatic aircraft SR MAIAI Aiitirr1 Fred Menna modified Mick Heeves kit produce fine Hawker Hurricane flew 83 Nats Sport Scale ship uses 05 90 has Aero Gloss over silkapan weighs 1475 lb Stanley Jonutis prepares Spinks Akromaster built Pilot kit Sport Scale static judging 83 Nats aerobatic 7-lb 60-in-span model covered MonoKote uses Kraft 61 engine Akromaster prototype now EAA U.m nt Ohknmh WI wire servos obtain realistic flight has always some question servo torque necessary control heavy fast models Giant Scale doubts arise because know experi ence large excursions control surface travel required low airspeeds less travel speed increases Its quite possible small servo low torque may able move control surface fast-moving airstream reality its never expected accomplish task Transmitter controls moved greater dis tance model speeds near stall much less model cruising speed minimize weight Douglas A-20 twin Ace Bantam Midget servos used model rather large heavy 79-in span 14 lb pair 40 engines its airspeed very high Ailerons very sensitive speeds good indi cation tiny servos doing job undue strain Keep old models flying models mentioned earlier have actually im proved age though accidents have put out service temporarily Sopwith has strained through trees along runway Rhinebeck Em eraude encounter tree Tou louse France Mailpiane once scat tered itself over large area flying field Kitchener-Waterloo Scale Rally survived restored usefulness went win contests Restoration crashed airplane demands much less time starting scratch contrary common beliefs modelers topquality Scale model particular may have thousand hours construction time shouldnt scrapped willingly sport plane assembled several weeks Invest ment time Scale model too great written-off hastily also vestment documentation special parts Continued page 136 POWER * PERFORNNANCE * PRECISION TAIPAN PROPS Outperformed others extensive bench field tests Absolutely true helical pitch boss tip No flexing power loss vibration Glass-filled plastic Made Australia SIZERETAILCONDOR10-PACK 7 x 4075049450 7 x 6075049450 8x4085055510 8x6085055510 9 x 4105069630 9 x 6105069630 lOx 4125080750 10x6125080750 lix 5150097900 11 x 7150097900 Rfloolor Con Eohoe Hog 4 BInd 8o. Hol,ROtInlo con Shop mail phone Visit CONDOR HOBBIES SHOWROOM 17971 Skypark Circle Suite D Irvine California 92714 714 261-5132 250-1425 Hours Monday thru Friday 900 700 Open Saturdays 1000 500 TELE TACHOMETER NEWl Digicon TT-01 Tele Tachometer first time can read engine mm and/or airspeed tually flight No guesr Nnw lIohlI knpno odo kop prop plug fuel giving CdS sen sors coupled subminiature air borne TX send data handheld unit Accurate rpm 30k airspeed 300 Km/h Audible stall warning RDF traces lost aircraft Reg $18495 Condor $14995 TUNED PIPES ARE FUSSY COMPLICATED & EXPENSIVE RIGHT NOT ANYMOREl unique slide valve design lets tune engine its peak power ght nowl Right field Just warm-up slide adjusting wire highest rpm see instructions tighten lock screw bore holes sky Youll love wide powerband uncritical -.....needle setting extra power Clarence Lee picked up F1quick 1000 rpm first bench run K&B report gains 700 1500 rpm ious competi 65 FR Formula 500 reference engine Most novices tors size handles engines 25 go CONDOR discounts headers youll Handling Charges onneed side exhaust engines SPECS dia Prepaid Orders $250stainless steel tubing 20% overall length 5 oz wt COD Orders Credit Cards $475 Sugg Retail $2996/Condor just $2450 March 1984 47 Heres small Sport Scale Boeing B29A scratchbuilt F J Gonzalez Four OS 25 engines power l9Vsib 126in wingspan WW ii bomber First place Military Scale class Chicago Expo won Ruth Curtis Fokker 0-ViI Its finish silk Aero Gloss dope Power K&B 61 PEAK POWER PIPELook 10011 Adloen,, Shd LJ~U POWRZOOM winch serious flyer demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplane ijchoose speed select pulleys j% launcha minute flights use companion RETRIEVER $250 Electrics/Kopski Continued page 133 Im convinced both planes good candidate designs Electric structures must beefed up lightness Personally felt terrible because somehow failed convey importance lightweight flying friendnot once twice Being determined stal wart modeler now off finishing two electric-powered Old-Timers Buzzard Bombshell Playboy Remember what said earlier series suggest thinking terms quarter ouncesfour make up ounce four make up quarter pounder Playboy Old-Timer Vital Statistics Wing styleElliptical tips Wingspan68 Wing chord constant9/2 Wing area planform576 sq DihedralPoly Wing frame weight4 Oz DAVE V SYSTEMS CORPOR ION ONE WOOD LANE MALVERNPA19355 215644-0692 Write call information Wing weight covered6 oz AirfoilUndercambered Tail assemblyBuilt-up Tail weight covered11/2 OZ Fuselage construction uilt-up stick Fuselage weight covered 31/3 OZ RadioThree channels used Controls .. RudElev ON/OFF Mot Radio battery250 mAh Radio weight6/2 OZ Motor batterySix 12 Ah cells Motor controlMicroswitch Battery weight12 oz MotorLeisure LT-50 DriveLeisure 251 gear Prop10-6 11-6 Mot gear prop weight7/2 Oz Misc weightApprox1 2 oz Total plane weight41 oz Power system weight20 oz Wing loading1O/4oz/sq ft need new timers fly like plane second installment Planes Flying next month 11 look some ways build strong lightweight model structures Therell some rules thumb will help maximize Electric achievementand some thoughts what plane choose Meanwhile please direct comments questions SASE author Bob Kopski 25 West End Dr Lansdale PA 19446 RC Scale/Wischers Continued oaoe 47 made exclusively model cant used another plane Too much lost model isnt rebuilt large investment time money normal Scale modeling makes sense expend effort direction preservation No 1 admonition make certain good battery life before flying session since batteries common source problems lead air plane damage Cyclers have place arent really insurance against failure much inclined rely upon expanded-scale voltmeter resistance load quick battery check first time voltmeter needle drops sud denly doesnt come up proper level good Scale model will have saved possible destruction next flight Overworked receiver cells carrying load swarm servos subject vibration weak link RC sys tem Using larger-capacity cells isnt solu tion because dead cell drops voltage below requirements Larger cells per mit flights larger servos 18 Scale airplanes nine flown regu larly have same charging jack sake convenience Deans-type socket switch wiring harness Plug ging meter simple matter leaves no excuse omitting check same meter can used checking trans mitter batteries peace mind alone its worth $16 price Tower Hobbies Second importance models bal ance point Tail-heavy models can flown incidence angles wing stabilizer properly set up burden controlling such unstable beast too great experienced fliers nose-heavy model may WING SPAN4 WING AREA198 51 ENGINE15 WEIGHT34 IS Babe body loan wing sheeting die Cut formert rolled planS 2 nSf. 15 HIGHLY AEROBATIC DESIGNED Weller Nu Dentouk Jr PEPPERMINT PATTIE 15 STINGER II CMASTER KJT Div BAR/RICH SALES CO 2 FAIRWAY-HANNIBAL M0834G1314/221 8853 WING SPAN 30 WING AREABOA sqin ENGINE45 EIGHT5s balsa unstractiOn die Cut lornCrs ribs 2shts InlI Claw plans Good ground Seedling gaelIc lending good first bipe FU LLY AEROB ATIC NEW R/C BOOKLET Answers questions often asked want get started R/C flying PLUS troduces best airplane start GOLDEN FALCON receive Copy ____________ SEND $200 TO ST CROIX OF PARK FALLS LTD PO Box 279P Park Falls WI 54552 136 Model Aviation batter inc1d * plus shipping BUILDS WING STAB & FUSE gz CHOICE OF MODELERS flTHEWORLDOVER Standard-o Full House Wing Jig $69~ Fuse iI$~o Wing & Fuse $79 Jig 4justojig CoR R Box 673Noblenville Indiana 46060317 877-2223 Whether consider yourself novice oran expert model builder A-Justo Jig will improve aircraft construc tion e valuable time bargain A-Justo-Jig holds major com ponents proper alignment entire unit will rotate 36O permit fit glue plank shape sand con venient position No messy glu ing over plans waiting dry before beginning opposite side A-Justo-Jig will adjust rib former spacing lets build-in wing dihedral strong warp-free construction TO USE simple template rib indexing tool included locate drill holes rib alignment rods easy preparation takes approx 15 minutes average wing A-Justo-Jig builds em better Ask favorite hobby dealer Youll glad did arantee non-aerobatic its stability will keep out trouble dreaded inadvertent stall-and-snap-roll Its true adding weight nose merely increases total model weight thereby raising wing loading stall speed model may never fly properly safely After rebuilding crashed airplane find almost invariably balance point has shifted aft due extra few coats paint bit added plywood re inforcement happened recently restoration crashed Ryan SCW now has 12 oz lead cowl fastened far forward possible Perfor mance hasnt suffered too badly landing speed isnt perceptibly higher may need weight because aircraft has long tail short nose other words resist temptation lavish extra finishing coats long tail Another important consideration long-lived model provide convenient means adjusting engines needle valve needle cant adjusted leads temptation fly isnt set optimum point reliable fuel feed flight attitudes heavy Scale model needs full engine output climb may suf fer early return earth power sags due lean setting Fully-cowled en gines vulnerable dont like poke hole through cowl con spicuous location make needle acces sible As consequence engine runs hot because needle cant moved richer setting closed cowl may con tribute heat build-up because poor air circulation unhappy combination could lead short life both engine air plane fuel tank too low fuselage can also contribute overheatingusually late flight level fuel drops causing mixture become lean Muffler pressure tank Robart Pumper may answer After accident have made prac tice retrieving broken piece crashed airplane disagree able tasks modeling experience helps have assistant someone will resist immediate inclination burn remains Quite often parts can re assembled like giant jigsaw puzzle glue joint stronger surrounding balsa Wing spars longerons may need thin plywood gussets reinforcement Ex ternal cracks can filled spackling compound Hobbypoxy Stuff become invisible after sanding re finishing Some weight added pro cess least several ounces averagesize plane balsa may pieced together plywood portions such bulk heads need completely replaced Rebuilding wreck may actually ideal opportunity make improvements though old plane has already thoroughly de-bugged may become evi dent certain balsa parts overstressed should replaced ply wood rough rule-of-thumb says plywood having one-fourth thickness balsa part will have equal weight twice strength example V4-in balsa Continued page 140 March 1984 137 DONT WANT -m HOLD l1 ThIS TIME RALN Perma-Grit TM Lifetime * Tungsten Carbide grit hardest material next diamondl * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knite rasp & sanding blocks excellent tools modeler can use Don Lowe Pro tessional Engineer Ask Dealer send check MO No CODs DG Products 209 Carrlands Dr Dayton OH 45429 513 294-1192 RC Scale/Wischers Continued page 137 piece could replaced /16-in ply no sacrifice weight gain strength Landing gears certainly subject abuse damage minor accident After first landing mishap time has come increase strength example brass-tube struts can changed steel Brass may quickly accessible hardware stores hobby shops steel has longer life high stress applications Air craft steel tubing other hand doesnt telescope successive sizes brass tube bit harder find airports air craft supply dealers worthwhile search better material Aluminum tubing can used single-strut-type land ing gears provided alloy pure aluminum soft aluminum tubing sold hardware stores less satisfactory brass unless very heavy wall thicknesses used Preferred aluminum tube 2024-T3 alloy 6061-T6 second choice proper choice wall thicknesses aluminum tubes will telescope Local steel supply houses carry alloy aluminum tubes First flights after major repair very similar very first new model mixed feelings anticipation apprehension goes well usual case elation follows Resurrection model unsightly mess pro vides satisfaction equal completion Paul Clements Presents BEAUTIFUL 84A&6 AWARD-WINNING COMPETITOR AMA 5 FAI PATTERN DESIGN \ gsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made IJSA Average Modelers Use F100Flat Coarse/Fine$695 F-101 Flat Fine$695 F-102Flat Course$695 R-200 Redius Course/Fine$695 1201 Tangent Coerse/Fine$695 E202RoundCourse/Fine$625 R-203 1/2 Hound Coarse/fine$495 1204 t/a Round Course/Fine$495 Postage Paid Oho residents add 6% tax new aircraft Bob Dolly Wiseher S-221 Lapham Peak Rd Delafield WI 53018 RC Aerobatics/Van Putte Continued tram oaoe 49 gives off electromagnetic vibrations can occupy frequencies DC out through light frequencies radiations presented RC receivers antenna receivers RF circuits have some ability reject unwanted signals ability limited power levels vicinity design power level control transmitter presented stronger signals signals may overload receivers filters force way through set pro ducing interference extreme cases currents induced lightning can physical damage active parts circuit melting down transistors ICs punching holes low-voltage capacitors Whether happens depends primarily distance between RC receiver lightning bolt general see lightning bolts shouldnt flying Its easy deter electrical storm approach ing Any broadcast-band AM receiver will crackle sputter response lightning bolts tens miles away Hearing such noises should warning enough Gary Malchus Milford UT wrote have worked National Weather Ser Designed Manufactured Paul Clements KITTY IAWI MODELI RR 2 Pauli lAd 47454 Phone 812 7233601 WING SPAN ING AREA 704 sq inBasic Kit $9895 MOTOR u 0 Deluxe Kit $14995 WEIGHTs 9 lbs BASIC KIT INCLUDEs F5erglass fuselage bulkhead installed molded fin foam wing stab cores LG blocks wrres nose gearwire 4fiberglassfape plans instroofions DELUXE KIT INCLUDES aboon plas balsa Eardwoad fiberglass wing tips hinges fiberglass pass rods aileron linkage snap links tO straps screws wing bolts 005101 horns nose gear afeering arm 80 throffle linkage vice 28 years lightning thing have observed times Four years ago friend flying afternoon thunderstorm developed about three miles away flying QB 405 Aero Sport radio 72320 As mak ing high-speed flyby about 20 ft off ground bolt lightning hit about two miles away plane rolled over hit ground about 450 angle friend flying QB 205 Cirrus radio 72160 about 200 ft air flying straight level lightning hit airplane went spin about four rotations able re cover make landing no problems During latter part July early August get flow moist air off Gulf Mexico comes southwest Utah call monsoon season period two three weeks get thun derstorms almost afternoon 1982 during monsoon season numer ous glitches decided would no longer fly lightning within about eight miles flying 1 spent three days Reno NV during Aero Scale 82 afternoon thun derstorms would develop about 2 pm would lightning over place am convinced least three crashes due lightning area certainly sounds like Garys experience bears out Georges observations prob Continued page 144 Quality Wood Products Serious Modeler Send $1 br catalog Price applied tirst order Buckeye Balsa supplies AAA quality balsa certified aircraft plywood fine kits Aero Composites Curtis Model Aircraft Co Fliteglas Models Fourmost Products Kitty Hawk Models Dave Platt Precision Built Models RIC Kits Mfg VK Models Bob Dively Model Aircraft hobby shops Hobby Shop Orders Welcome 216 533 3607 P0 Box 174 Canfleld OH 44406 140 Model Aviation See dealer distributor available send check money order VISA MasterCdrd plus $700 UPS shipping to
Edition: Model Aviation - 1984/03
Page Numbers: 46, 47, 136, 137, 140
Radio Control SCALE Bob & Dolly Wischer IMPROVING OLD MODELS ancient Douglas Mailpiane before its retirement new AMA museum flying bet ter time during its 13-year life important difference flight handling came about old four-wire servos replaced new three-wire Royal Titans never regarded older servos being less reliable operation proof improvement comparison tween flights before after change Most pronounced improvement new-found ability fly hands off transmitter controls extended periods result positive servocentering greater torque output Most noticeable change improvement aileron response Four very large ailerons could now moved centered 38 in-oz torque positive return neutral Douglas went museum its servos installed 12-year-old Emeraude replace old heavy fourwire types used since model new Improvement perfor mance revelation model became much active responsive control inputs Once set up straight-and-level would become fly-away something wasnt done bring back An additional benefit decrease model weight Titans servos mounted considerable distance behind center gravity change servos actu ally moved CG forward pronounced increase stability model will perform tailspins snap rolls command inadvertent snap roll slow speed now absent Emeraude may now bit nose-heavy preferred condition now requires lot less attention airborne downright relaxing fly Improvement Emeraudes flight aroused curiosity what would happen newer servos used 15-year-old Sopwith 1 V2 Strutter large airplane 1100 sq wing area quite light 6/2 lb reasoned highertorque servos wouldnt necessary Ban- tam Midgets installed some Jim PepInos 83 Nats entry upermarinC Spitfire Mk-16 originated Pica kit Perfect Paint used finish Kraft 61-powered Sport Scale WW II fighter Jim proprietor Scale Plan Photo Service Greensboro NC could used advantage Most surprising amount pilot effort get scalelike flight considerably reduced old four-wire servos may serviceable throttle rudder However preference aileron elevator applications active positive-centering threedoubt about ability 18 in-oz servo move four large ailerons proved no problem aileron response posi tive speeds change servos already lightweight Sopwith lost other half-pound first time models true potential aerobatic aircraft SR MAIAI Aiitirr1 Fred Menna modified Mick Heeves kit produce fine Hawker Hurricane flew 83 Nats Sport Scale ship uses 05 90 has Aero Gloss over silkapan weighs 1475 lb Stanley Jonutis prepares Spinks Akromaster built Pilot kit Sport Scale static judging 83 Nats aerobatic 7-lb 60-in-span model covered MonoKote uses Kraft 61 engine Akromaster prototype now EAA U.m nt Ohknmh WI wire servos obtain realistic flight has always some question servo torque necessary control heavy fast models Giant Scale doubts arise because know experi ence large excursions control surface travel required low airspeeds less travel speed increases Its quite possible small servo low torque may able move control surface fast-moving airstream reality its never expected accomplish task Transmitter controls moved greater dis tance model speeds near stall much less model cruising speed minimize weight Douglas A-20 twin Ace Bantam Midget servos used model rather large heavy 79-in span 14 lb pair 40 engines its airspeed very high Ailerons very sensitive speeds good indi cation tiny servos doing job undue strain Keep old models flying models mentioned earlier have actually im proved age though accidents have put out service temporarily Sopwith has strained through trees along runway Rhinebeck Em eraude encounter tree Tou louse France Mailpiane once scat tered itself over large area flying field Kitchener-Waterloo Scale Rally survived restored usefulness went win contests Restoration crashed airplane demands much less time starting scratch contrary common beliefs modelers topquality Scale model particular may have thousand hours construction time shouldnt scrapped willingly sport plane assembled several weeks Invest ment time Scale model too great written-off hastily also vestment documentation special parts Continued page 136 POWER * PERFORNNANCE * PRECISION TAIPAN PROPS Outperformed others extensive bench field tests Absolutely true helical pitch boss tip No flexing power loss vibration Glass-filled plastic Made Australia SIZERETAILCONDOR10-PACK 7 x 4075049450 7 x 6075049450 8x4085055510 8x6085055510 9 x 4105069630 9 x 6105069630 lOx 4125080750 10x6125080750 lix 5150097900 11 x 7150097900 Rfloolor Con Eohoe Hog 4 BInd 8o. Hol,ROtInlo con Shop mail phone Visit CONDOR HOBBIES SHOWROOM 17971 Skypark Circle Suite D Irvine California 92714 714 261-5132 250-1425 Hours Monday thru Friday 900 700 Open Saturdays 1000 500 TELE TACHOMETER NEWl Digicon TT-01 Tele Tachometer first time can read engine mm and/or airspeed tually flight No guesr Nnw lIohlI knpno odo kop prop plug fuel giving CdS sen sors coupled subminiature air borne TX send data handheld unit Accurate rpm 30k airspeed 300 Km/h Audible stall warning RDF traces lost aircraft Reg $18495 Condor $14995 TUNED PIPES ARE FUSSY COMPLICATED & EXPENSIVE RIGHT NOT ANYMOREl unique slide valve design lets tune engine its peak power ght nowl Right field Just warm-up slide adjusting wire highest rpm see instructions tighten lock screw bore holes sky Youll love wide powerband uncritical -.....needle setting extra power Clarence Lee picked up F1quick 1000 rpm first bench run K&B report gains 700 1500 rpm ious competi 65 FR Formula 500 reference engine Most novices tors size handles engines 25 go CONDOR discounts headers youll Handling Charges onneed side exhaust engines SPECS dia Prepaid Orders $250stainless steel tubing 20% overall length 5 oz wt COD Orders Credit Cards $475 Sugg Retail $2996/Condor just $2450 March 1984 47 Heres small Sport Scale Boeing B29A scratchbuilt F J Gonzalez Four OS 25 engines power l9Vsib 126in wingspan WW ii bomber First place Military Scale class Chicago Expo won Ruth Curtis Fokker 0-ViI Its finish silk Aero Gloss dope Power K&B 61 PEAK POWER PIPELook 10011 Adloen,, Shd LJ~U POWRZOOM winch serious flyer demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplane ijchoose speed select pulleys j% launcha minute flights use companion RETRIEVER $250 Electrics/Kopski Continued page 133 Im convinced both planes good candidate designs Electric structures must beefed up lightness Personally felt terrible because somehow failed convey importance lightweight flying friendnot once twice Being determined stal wart modeler now off finishing two electric-powered Old-Timers Buzzard Bombshell Playboy Remember what said earlier series suggest thinking terms quarter ouncesfour make up ounce four make up quarter pounder Playboy Old-Timer Vital Statistics Wing styleElliptical tips Wingspan68 Wing chord constant9/2 Wing area planform576 sq DihedralPoly Wing frame weight4 Oz DAVE V SYSTEMS CORPOR ION ONE WOOD LANE MALVERNPA19355 215644-0692 Write call information Wing weight covered6 oz AirfoilUndercambered Tail assemblyBuilt-up Tail weight covered11/2 OZ Fuselage construction uilt-up stick Fuselage weight covered 31/3 OZ RadioThree channels used Controls .. RudElev ON/OFF Mot Radio battery250 mAh Radio weight6/2 OZ Motor batterySix 12 Ah cells Motor controlMicroswitch Battery weight12 oz MotorLeisure LT-50 DriveLeisure 251 gear Prop10-6 11-6 Mot gear prop weight7/2 Oz Misc weightApprox1 2 oz Total plane weight41 oz Power system weight20 oz Wing loading1O/4oz/sq ft need new timers fly like plane second installment Planes Flying next month 11 look some ways build strong lightweight model structures Therell some rules thumb will help maximize Electric achievementand some thoughts what plane choose Meanwhile please direct comments questions SASE author Bob Kopski 25 West End Dr Lansdale PA 19446 RC Scale/Wischers Continued oaoe 47 made exclusively model cant used another plane Too much lost model isnt rebuilt large investment time money normal Scale modeling makes sense expend effort direction preservation No 1 admonition make certain good battery life before flying session since batteries common source problems lead air plane damage Cyclers have place arent really insurance against failure much inclined rely upon expanded-scale voltmeter resistance load quick battery check first time voltmeter needle drops sud denly doesnt come up proper level good Scale model will have saved possible destruction next flight Overworked receiver cells carrying load swarm servos subject vibration weak link RC sys tem Using larger-capacity cells isnt solu tion because dead cell drops voltage below requirements Larger cells per mit flights larger servos 18 Scale airplanes nine flown regu larly have same charging jack sake convenience Deans-type socket switch wiring harness Plug ging meter simple matter leaves no excuse omitting check same meter can used checking trans mitter batteries peace mind alone its worth $16 price Tower Hobbies Second importance models bal ance point Tail-heavy models can flown incidence angles wing stabilizer properly set up burden controlling such unstable beast too great experienced fliers nose-heavy model may WING SPAN4 WING AREA198 51 ENGINE15 WEIGHT34 IS Babe body loan wing sheeting die Cut formert rolled planS 2 nSf. 15 HIGHLY AEROBATIC DESIGNED Weller Nu Dentouk Jr PEPPERMINT PATTIE 15 STINGER II CMASTER KJT Div BAR/RICH SALES CO 2 FAIRWAY-HANNIBAL M0834G1314/221 8853 WING SPAN 30 WING AREABOA sqin ENGINE45 EIGHT5s balsa unstractiOn die Cut lornCrs ribs 2shts InlI Claw plans Good ground Seedling gaelIc lending good first bipe FU LLY AEROB ATIC NEW R/C BOOKLET Answers questions often asked want get started R/C flying PLUS troduces best airplane start GOLDEN FALCON receive Copy ____________ SEND $200 TO ST CROIX OF PARK FALLS LTD PO Box 279P Park Falls WI 54552 136 Model Aviation batter inc1d * plus shipping BUILDS WING STAB & FUSE gz CHOICE OF MODELERS flTHEWORLDOVER Standard-o Full House Wing Jig $69~ Fuse iI$~o Wing & Fuse $79 Jig 4justojig CoR R Box 673Noblenville Indiana 46060317 877-2223 Whether consider yourself novice oran expert model builder A-Justo Jig will improve aircraft construc tion e valuable time bargain A-Justo-Jig holds major com ponents proper alignment entire unit will rotate 36O permit fit glue plank shape sand con venient position No messy glu ing over plans waiting dry before beginning opposite side A-Justo-Jig will adjust rib former spacing lets build-in wing dihedral strong warp-free construction TO USE simple template rib indexing tool included locate drill holes rib alignment rods easy preparation takes approx 15 minutes average wing A-Justo-Jig builds em better Ask favorite hobby dealer Youll glad did arantee non-aerobatic its stability will keep out trouble dreaded inadvertent stall-and-snap-roll Its true adding weight nose merely increases total model weight thereby raising wing loading stall speed model may never fly properly safely After rebuilding crashed airplane find almost invariably balance point has shifted aft due extra few coats paint bit added plywood re inforcement happened recently restoration crashed Ryan SCW now has 12 oz lead cowl fastened far forward possible Perfor mance hasnt suffered too badly landing speed isnt perceptibly higher may need weight because aircraft has long tail short nose other words resist temptation lavish extra finishing coats long tail Another important consideration long-lived model provide convenient means adjusting engines needle valve needle cant adjusted leads temptation fly isnt set optimum point reliable fuel feed flight attitudes heavy Scale model needs full engine output climb may suf fer early return earth power sags due lean setting Fully-cowled en gines vulnerable dont like poke hole through cowl con spicuous location make needle acces sible As consequence engine runs hot because needle cant moved richer setting closed cowl may con tribute heat build-up because poor air circulation unhappy combination could lead short life both engine air plane fuel tank too low fuselage can also contribute overheatingusually late flight level fuel drops causing mixture become lean Muffler pressure tank Robart Pumper may answer After accident have made prac tice retrieving broken piece crashed airplane disagree able tasks modeling experience helps have assistant someone will resist immediate inclination burn remains Quite often parts can re assembled like giant jigsaw puzzle glue joint stronger surrounding balsa Wing spars longerons may need thin plywood gussets reinforcement Ex ternal cracks can filled spackling compound Hobbypoxy Stuff become invisible after sanding re finishing Some weight added pro cess least several ounces averagesize plane balsa may pieced together plywood portions such bulk heads need completely replaced Rebuilding wreck may actually ideal opportunity make improvements though old plane has already thoroughly de-bugged may become evi dent certain balsa parts overstressed should replaced ply wood rough rule-of-thumb says plywood having one-fourth thickness balsa part will have equal weight twice strength example V4-in balsa Continued page 140 March 1984 137 DONT WANT -m HOLD l1 ThIS TIME RALN Perma-Grit TM Lifetime * Tungsten Carbide grit hardest material next diamondl * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knite rasp & sanding blocks excellent tools modeler can use Don Lowe Pro tessional Engineer Ask Dealer send check MO No CODs DG Products 209 Carrlands Dr Dayton OH 45429 513 294-1192 RC Scale/Wischers Continued page 137 piece could replaced /16-in ply no sacrifice weight gain strength Landing gears certainly subject abuse damage minor accident After first landing mishap time has come increase strength example brass-tube struts can changed steel Brass may quickly accessible hardware stores hobby shops steel has longer life high stress applications Air craft steel tubing other hand doesnt telescope successive sizes brass tube bit harder find airports air craft supply dealers worthwhile search better material Aluminum tubing can used single-strut-type land ing gears provided alloy pure aluminum soft aluminum tubing sold hardware stores less satisfactory brass unless very heavy wall thicknesses used Preferred aluminum tube 2024-T3 alloy 6061-T6 second choice proper choice wall thicknesses aluminum tubes will telescope Local steel supply houses carry alloy aluminum tubes First flights after major repair very similar very first new model mixed feelings anticipation apprehension goes well usual case elation follows Resurrection model unsightly mess pro vides satisfaction equal completion Paul Clements Presents BEAUTIFUL 84A&6 AWARD-WINNING COMPETITOR AMA 5 FAI PATTERN DESIGN \ gsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made IJSA Average Modelers Use F100Flat Coarse/Fine$695 F-101 Flat Fine$695 F-102Flat Course$695 R-200 Redius Course/Fine$695 1201 Tangent Coerse/Fine$695 E202RoundCourse/Fine$625 R-203 1/2 Hound Coarse/fine$495 1204 t/a Round Course/Fine$495 Postage Paid Oho residents add 6% tax new aircraft Bob Dolly Wiseher S-221 Lapham Peak Rd Delafield WI 53018 RC Aerobatics/Van Putte Continued tram oaoe 49 gives off electromagnetic vibrations can occupy frequencies DC out through light frequencies radiations presented RC receivers antenna receivers RF circuits have some ability reject unwanted signals ability limited power levels vicinity design power level control transmitter presented stronger signals signals may overload receivers filters force way through set pro ducing interference extreme cases currents induced lightning can physical damage active parts circuit melting down transistors ICs punching holes low-voltage capacitors Whether happens depends primarily distance between RC receiver lightning bolt general see lightning bolts shouldnt flying Its easy deter electrical storm approach ing Any broadcast-band AM receiver will crackle sputter response lightning bolts tens miles away Hearing such noises should warning enough Gary Malchus Milford UT wrote have worked National Weather Ser Designed Manufactured Paul Clements KITTY IAWI MODELI RR 2 Pauli lAd 47454 Phone 812 7233601 WING SPAN ING AREA 704 sq inBasic Kit $9895 MOTOR u 0 Deluxe Kit $14995 WEIGHTs 9 lbs BASIC KIT INCLUDEs F5erglass fuselage bulkhead installed molded fin foam wing stab cores LG blocks wrres nose gearwire 4fiberglassfape plans instroofions DELUXE KIT INCLUDES aboon plas balsa Eardwoad fiberglass wing tips hinges fiberglass pass rods aileron linkage snap links tO straps screws wing bolts 005101 horns nose gear afeering arm 80 throffle linkage vice 28 years lightning thing have observed times Four years ago friend flying afternoon thunderstorm developed about three miles away flying QB 405 Aero Sport radio 72320 As mak ing high-speed flyby about 20 ft off ground bolt lightning hit about two miles away plane rolled over hit ground about 450 angle friend flying QB 205 Cirrus radio 72160 about 200 ft air flying straight level lightning hit airplane went spin about four rotations able re cover make landing no problems During latter part July early August get flow moist air off Gulf Mexico comes southwest Utah call monsoon season period two three weeks get thun derstorms almost afternoon 1982 during monsoon season numer ous glitches decided would no longer fly lightning within about eight miles flying 1 spent three days Reno NV during Aero Scale 82 afternoon thun derstorms would develop about 2 pm would lightning over place am convinced least three crashes due lightning area certainly sounds like Garys experience bears out Georges observations prob Continued page 144 Quality Wood Products Serious Modeler Send $1 br catalog Price applied tirst order Buckeye Balsa supplies AAA quality balsa certified aircraft plywood fine kits Aero Composites Curtis Model Aircraft Co Fliteglas Models Fourmost Products Kitty Hawk Models Dave Platt Precision Built Models RIC Kits Mfg VK Models Bob Dively Model Aircraft hobby shops Hobby Shop Orders Welcome 216 533 3607 P0 Box 174 Canfleld OH 44406 140 Model Aviation See dealer distributor available send check money order VISA MasterCdrd plus $700 UPS shipping to
Edition: Model Aviation - 1984/03
Page Numbers: 46, 47, 136, 137, 140
Radio Control SCALE Bob & Dolly Wischer IMPROVING OLD MODELS ancient Douglas Mailpiane before its retirement new AMA museum flying bet ter time during its 13-year life important difference flight handling came about old four-wire servos replaced new three-wire Royal Titans never regarded older servos being less reliable operation proof improvement comparison tween flights before after change Most pronounced improvement new-found ability fly hands off transmitter controls extended periods result positive servocentering greater torque output Most noticeable change improvement aileron response Four very large ailerons could now moved centered 38 in-oz torque positive return neutral Douglas went museum its servos installed 12-year-old Emeraude replace old heavy fourwire types used since model new Improvement perfor mance revelation model became much active responsive control inputs Once set up straight-and-level would become fly-away something wasnt done bring back An additional benefit decrease model weight Titans servos mounted considerable distance behind center gravity change servos actu ally moved CG forward pronounced increase stability model will perform tailspins snap rolls command inadvertent snap roll slow speed now absent Emeraude may now bit nose-heavy preferred condition now requires lot less attention airborne downright relaxing fly Improvement Emeraudes flight aroused curiosity what would happen newer servos used 15-year-old Sopwith 1 V2 Strutter large airplane 1100 sq wing area quite light 6/2 lb reasoned highertorque servos wouldnt necessary Ban- tam Midgets installed some Jim PepInos 83 Nats entry upermarinC Spitfire Mk-16 originated Pica kit Perfect Paint used finish Kraft 61-powered Sport Scale WW II fighter Jim proprietor Scale Plan Photo Service Greensboro NC could used advantage Most surprising amount pilot effort get scalelike flight considerably reduced old four-wire servos may serviceable throttle rudder However preference aileron elevator applications active positive-centering threedoubt about ability 18 in-oz servo move four large ailerons proved no problem aileron response posi tive speeds change servos already lightweight Sopwith lost other half-pound first time models true potential aerobatic aircraft SR MAIAI Aiitirr1 Fred Menna modified Mick Heeves kit produce fine Hawker Hurricane flew 83 Nats Sport Scale ship uses 05 90 has Aero Gloss over silkapan weighs 1475 lb Stanley Jonutis prepares Spinks Akromaster built Pilot kit Sport Scale static judging 83 Nats aerobatic 7-lb 60-in-span model covered MonoKote uses Kraft 61 engine Akromaster prototype now EAA U.m nt Ohknmh WI wire servos obtain realistic flight has always some question servo torque necessary control heavy fast models Giant Scale doubts arise because know experi ence large excursions control surface travel required low airspeeds less travel speed increases Its quite possible small servo low torque may able move control surface fast-moving airstream reality its never expected accomplish task Transmitter controls moved greater dis tance model speeds near stall much less model cruising speed minimize weight Douglas A-20 twin Ace Bantam Midget servos used model rather large heavy 79-in span 14 lb pair 40 engines its airspeed very high Ailerons very sensitive speeds good indi cation tiny servos doing job undue strain Keep old models flying models mentioned earlier have actually im proved age though accidents have put out service temporarily Sopwith has strained through trees along runway Rhinebeck Em eraude encounter tree Tou louse France Mailpiane once scat tered itself over large area flying field Kitchener-Waterloo Scale Rally survived restored usefulness went win contests Restoration crashed airplane demands much less time starting scratch contrary common beliefs modelers topquality Scale model particular may have thousand hours construction time shouldnt scrapped willingly sport plane assembled several weeks Invest ment time Scale model too great written-off hastily also vestment documentation special parts Continued page 136 POWER * PERFORNNANCE * PRECISION TAIPAN PROPS Outperformed others extensive bench field tests Absolutely true helical pitch boss tip No flexing power loss vibration Glass-filled plastic Made Australia SIZERETAILCONDOR10-PACK 7 x 4075049450 7 x 6075049450 8x4085055510 8x6085055510 9 x 4105069630 9 x 6105069630 lOx 4125080750 10x6125080750 lix 5150097900 11 x 7150097900 Rfloolor Con Eohoe Hog 4 BInd 8o. Hol,ROtInlo con Shop mail phone Visit CONDOR HOBBIES SHOWROOM 17971 Skypark Circle Suite D Irvine California 92714 714 261-5132 250-1425 Hours Monday thru Friday 900 700 Open Saturdays 1000 500 TELE TACHOMETER NEWl Digicon TT-01 Tele Tachometer first time can read engine mm and/or airspeed tually flight No guesr Nnw lIohlI knpno odo kop prop plug fuel giving CdS sen sors coupled subminiature air borne TX send data handheld unit Accurate rpm 30k airspeed 300 Km/h Audible stall warning RDF traces lost aircraft Reg $18495 Condor $14995 TUNED PIPES ARE FUSSY COMPLICATED & EXPENSIVE RIGHT NOT ANYMOREl unique slide valve design lets tune engine its peak power ght nowl Right field Just warm-up slide adjusting wire highest rpm see instructions tighten lock screw bore holes sky Youll love wide powerband uncritical -.....needle setting extra power Clarence Lee picked up F1quick 1000 rpm first bench run K&B report gains 700 1500 rpm ious competi 65 FR Formula 500 reference engine Most novices tors size handles engines 25 go CONDOR discounts headers youll Handling Charges onneed side exhaust engines SPECS dia Prepaid Orders $250stainless steel tubing 20% overall length 5 oz wt COD Orders Credit Cards $475 Sugg Retail $2996/Condor just $2450 March 1984 47 Heres small Sport Scale Boeing B29A scratchbuilt F J Gonzalez Four OS 25 engines power l9Vsib 126in wingspan WW ii bomber First place Military Scale class Chicago Expo won Ruth Curtis Fokker 0-ViI Its finish silk Aero Gloss dope Power K&B 61 PEAK POWER PIPELook 10011 Adloen,, Shd LJ~U POWRZOOM winch serious flyer demands extraordinary launching power sailplane particularly F3Bscale cross-country Included antikiting/ antibacklash brake 2200 ft braided nylon 160 lb line manual tow drum foot brake new specially engineered motor much capable drum speeds 5000 rpm launching 3 meter sailplane ijchoose speed select pulleys j% launcha minute flights use companion RETRIEVER $250 Electrics/Kopski Continued page 133 Im convinced both planes good candidate designs Electric structures must beefed up lightness Personally felt terrible because somehow failed convey importance lightweight flying friendnot once twice Being determined stal wart modeler now off finishing two electric-powered Old-Timers Buzzard Bombshell Playboy Remember what said earlier series suggest thinking terms quarter ouncesfour make up ounce four make up quarter pounder Playboy Old-Timer Vital Statistics Wing styleElliptical tips Wingspan68 Wing chord constant9/2 Wing area planform576 sq DihedralPoly Wing frame weight4 Oz DAVE V SYSTEMS CORPOR ION ONE WOOD LANE MALVERNPA19355 215644-0692 Write call information Wing weight covered6 oz AirfoilUndercambered Tail assemblyBuilt-up Tail weight covered11/2 OZ Fuselage construction uilt-up stick Fuselage weight covered 31/3 OZ RadioThree channels used Controls .. RudElev ON/OFF Mot Radio battery250 mAh Radio weight6/2 OZ Motor batterySix 12 Ah cells Motor controlMicroswitch Battery weight12 oz MotorLeisure LT-50 DriveLeisure 251 gear Prop10-6 11-6 Mot gear prop weight7/2 Oz Misc weightApprox1 2 oz Total plane weight41 oz Power system weight20 oz Wing loading1O/4oz/sq ft need new timers fly like plane second installment Planes Flying next month 11 look some ways build strong lightweight model structures Therell some rules thumb will help maximize Electric achievementand some thoughts what plane choose Meanwhile please direct comments questions SASE author Bob Kopski 25 West End Dr Lansdale PA 19446 RC Scale/Wischers Continued oaoe 47 made exclusively model cant used another plane Too much lost model isnt rebuilt large investment time money normal Scale modeling makes sense expend effort direction preservation No 1 admonition make certain good battery life before flying session since batteries common source problems lead air plane damage Cyclers have place arent really insurance against failure much inclined rely upon expanded-scale voltmeter resistance load quick battery check first time voltmeter needle drops sud denly doesnt come up proper level good Scale model will have saved possible destruction next flight Overworked receiver cells carrying load swarm servos subject vibration weak link RC sys tem Using larger-capacity cells isnt solu tion because dead cell drops voltage below requirements Larger cells per mit flights larger servos 18 Scale airplanes nine flown regu larly have same charging jack sake convenience Deans-type socket switch wiring harness Plug ging meter simple matter leaves no excuse omitting check same meter can used checking trans mitter batteries peace mind alone its worth $16 price Tower Hobbies Second importance models bal ance point Tail-heavy models can flown incidence angles wing stabilizer properly set up burden controlling such unstable beast too great experienced fliers nose-heavy model may WING SPAN4 WING AREA198 51 ENGINE15 WEIGHT34 IS Babe body loan wing sheeting die Cut formert rolled planS 2 nSf. 15 HIGHLY AEROBATIC DESIGNED Weller Nu Dentouk Jr PEPPERMINT PATTIE 15 STINGER II CMASTER KJT Div BAR/RICH SALES CO 2 FAIRWAY-HANNIBAL M0834G1314/221 8853 WING SPAN 30 WING AREABOA sqin ENGINE45 EIGHT5s balsa unstractiOn die Cut lornCrs ribs 2shts InlI Claw plans Good ground Seedling gaelIc lending good first bipe FU LLY AEROB ATIC NEW R/C BOOKLET Answers questions often asked want get started R/C flying PLUS troduces best airplane start GOLDEN FALCON receive Copy ____________ SEND $200 TO ST CROIX OF PARK FALLS LTD PO Box 279P Park Falls WI 54552 136 Model Aviation batter inc1d * plus shipping BUILDS WING STAB & FUSE gz CHOICE OF MODELERS flTHEWORLDOVER Standard-o Full House Wing Jig $69~ Fuse iI$~o Wing & Fuse $79 Jig 4justojig CoR R Box 673Noblenville Indiana 46060317 877-2223 Whether consider yourself novice oran expert model builder A-Justo Jig will improve aircraft construc tion e valuable time bargain A-Justo-Jig holds major com ponents proper alignment entire unit will rotate 36O permit fit glue plank shape sand con venient position No messy glu ing over plans waiting dry before beginning opposite side A-Justo-Jig will adjust rib former spacing lets build-in wing dihedral strong warp-free construction TO USE simple template rib indexing tool included locate drill holes rib alignment rods easy preparation takes approx 15 minutes average wing A-Justo-Jig builds em better Ask favorite hobby dealer Youll glad did arantee non-aerobatic its stability will keep out trouble dreaded inadvertent stall-and-snap-roll Its true adding weight nose merely increases total model weight thereby raising wing loading stall speed model may never fly properly safely After rebuilding crashed airplane find almost invariably balance point has shifted aft due extra few coats paint bit added plywood re inforcement happened recently restoration crashed Ryan SCW now has 12 oz lead cowl fastened far forward possible Perfor mance hasnt suffered too badly landing speed isnt perceptibly higher may need weight because aircraft has long tail short nose other words resist temptation lavish extra finishing coats long tail Another important consideration long-lived model provide convenient means adjusting engines needle valve needle cant adjusted leads temptation fly isnt set optimum point reliable fuel feed flight attitudes heavy Scale model needs full engine output climb may suf fer early return earth power sags due lean setting Fully-cowled en gines vulnerable dont like poke hole through cowl con spicuous location make needle acces sible As consequence engine runs hot because needle cant moved richer setting closed cowl may con tribute heat build-up because poor air circulation unhappy combination could lead short life both engine air plane fuel tank too low fuselage can also contribute overheatingusually late flight level fuel drops causing mixture become lean Muffler pressure tank Robart Pumper may answer After accident have made prac tice retrieving broken piece crashed airplane disagree able tasks modeling experience helps have assistant someone will resist immediate inclination burn remains Quite often parts can re assembled like giant jigsaw puzzle glue joint stronger surrounding balsa Wing spars longerons may need thin plywood gussets reinforcement Ex ternal cracks can filled spackling compound Hobbypoxy Stuff become invisible after sanding re finishing Some weight added pro cess least several ounces averagesize plane balsa may pieced together plywood portions such bulk heads need completely replaced Rebuilding wreck may actually ideal opportunity make improvements though old plane has already thoroughly de-bugged may become evi dent certain balsa parts overstressed should replaced ply wood rough rule-of-thumb says plywood having one-fourth thickness balsa part will have equal weight twice strength example V4-in balsa Continued page 140 March 1984 137 DONT WANT -m HOLD l1 ThIS TIME RALN Perma-Grit TM Lifetime * Tungsten Carbide grit hardest material next diamondl * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knite rasp & sanding blocks excellent tools modeler can use Don Lowe Pro tessional Engineer Ask Dealer send check MO No CODs DG Products 209 Carrlands Dr Dayton OH 45429 513 294-1192 RC Scale/Wischers Continued page 137 piece could replaced /16-in ply no sacrifice weight gain strength Landing gears certainly subject abuse damage minor accident After first landing mishap time has come increase strength example brass-tube struts can changed steel Brass may quickly accessible hardware stores hobby shops steel has longer life high stress applications Air craft steel tubing other hand doesnt telescope successive sizes brass tube bit harder find airports air craft supply dealers worthwhile search better material Aluminum tubing can used single-strut-type land ing gears provided alloy pure aluminum soft aluminum tubing sold hardware stores less satisfactory brass unless very heavy wall thicknesses used Preferred aluminum tube 2024-T3 alloy 6061-T6 second choice proper choice wall thicknesses aluminum tubes will telescope Local steel supply houses carry alloy aluminum tubes First flights after major repair very similar very first new model mixed feelings anticipation apprehension goes well usual case elation follows Resurrection model unsightly mess pro vides satisfaction equal completion Paul Clements Presents BEAUTIFUL 84A&6 AWARD-WINNING COMPETITOR AMA 5 FAI PATTERN DESIGN \ gsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made IJSA Average Modelers Use F100Flat Coarse/Fine$695 F-101 Flat Fine$695 F-102Flat Course$695 R-200 Redius Course/Fine$695 1201 Tangent Coerse/Fine$695 E202RoundCourse/Fine$625 R-203 1/2 Hound Coarse/fine$495 1204 t/a Round Course/Fine$495 Postage Paid Oho residents add 6% tax new aircraft Bob Dolly Wiseher S-221 Lapham Peak Rd Delafield WI 53018 RC Aerobatics/Van Putte Continued tram oaoe 49 gives off electromagnetic vibrations can occupy frequencies DC out through light frequencies radiations presented RC receivers antenna receivers RF circuits have some ability reject unwanted signals ability limited power levels vicinity design power level control transmitter presented stronger signals signals may overload receivers filters force way through set pro ducing interference extreme cases currents induced lightning can physical damage active parts circuit melting down transistors ICs punching holes low-voltage capacitors Whether happens depends primarily distance between RC receiver lightning bolt general see lightning bolts shouldnt flying Its easy deter electrical storm approach ing Any broadcast-band AM receiver will crackle sputter response lightning bolts tens miles away Hearing such noises should warning enough Gary Malchus Milford UT wrote have worked National Weather Ser Designed Manufactured Paul Clements KITTY IAWI MODELI RR 2 Pauli lAd 47454 Phone 812 7233601 WING SPAN ING AREA 704 sq inBasic Kit $9895 MOTOR u 0 Deluxe Kit $14995 WEIGHTs 9 lbs BASIC KIT INCLUDEs F5erglass fuselage bulkhead installed molded fin foam wing stab cores LG blocks wrres nose gearwire 4fiberglassfape plans instroofions DELUXE KIT INCLUDES aboon plas balsa Eardwoad fiberglass wing tips hinges fiberglass pass rods aileron linkage snap links tO straps screws wing bolts 005101 horns nose gear afeering arm 80 throffle linkage vice 28 years lightning thing have observed times Four years ago friend flying afternoon thunderstorm developed about three miles away flying QB 405 Aero Sport radio 72320 As mak ing high-speed flyby about 20 ft off ground bolt lightning hit about two miles away plane rolled over hit ground about 450 angle friend flying QB 205 Cirrus radio 72160 about 200 ft air flying straight level lightning hit airplane went spin about four rotations able re cover make landing no problems During latter part July early August get flow moist air off Gulf Mexico comes southwest Utah call monsoon season period two three weeks get thun derstorms almost afternoon 1982 during monsoon season numer ous glitches decided would no longer fly lightning within about eight miles flying 1 spent three days Reno NV during Aero Scale 82 afternoon thun derstorms would develop about 2 pm would lightning over place am convinced least three crashes due lightning area certainly sounds like Garys experience bears out Georges observations prob Continued page 144 Quality Wood Products Serious Modeler Send $1 br catalog Price applied tirst order Buckeye Balsa supplies AAA quality balsa certified aircraft plywood fine kits Aero Composites Curtis Model Aircraft Co Fliteglas Models Fourmost Products Kitty Hawk Models Dave Platt Precision Built Models RIC Kits Mfg VK Models Bob Dively Model Aircraft hobby shops Hobby Shop Orders Welcome 216 533 3607 P0 Box 174 Canfleld OH 44406 140 Model Aviation See dealer distributor available send check money order VISA MasterCdrd plus $700 UPS shipping to