NO OCR TEXT NO OCR TEXT THE history aviation has produced few men enough courage gamble convictions Wright Brothers Glenn Curt iss Tony Fokker Clyde Cessna Giuseppe Bel lanca Don Douglas Walt Beech Jack Northrop some Granville Brothers Gee Bees remarkable aircraft con tributed greatly advancement aerody namic engineering Granvilles innovations used other aircraft years Yet news media jumped misfortunes befalling built aircraft blowing mishap completely out proportion actuality expanding news accidents catas trophy contributed downfall Granville Brothers Aircraft Company crashes involving Gee Bee aircraft human fail ure pilot error contributed mech anical failures secondary factor Gee Bees aircraft originally designed flown good airplanes Only modified greater horsepower fuel tankage did get trouble stability problems changes authorized manufac turer Most people under impression Doolittle successfully fly Gee Bee R1 flew time Thompson Trophy race fact R1 racer test-flown number times Russell Boardman before Doolittle saw airplanes Doolittle flew R1 several times before Thompson race qualifying racer dedicated scale man 40powered model exact scale version real City Spring fieldeven aerodynamic set-up Granger Williams Shell event trying establish worlds speed record Other pilots flew Gee Bee racers included Lee Gehlbach Russell Thaw Roy Minor Jimmy Haislip Lee Gehlback test flew R2 flew both Bendix Thompson races first aircraft produced Granvilles 1929 small two place biplane side-byside seating Powered 60-hp Velie M5 engine unusual feature adjustable wing flap could changed flight various angles allowed unusually low landing speed still gave good flying perfor mance factory set up company turned building model Biplanes Early 1930 American Flying Derby organized sponsored American Cirrus Engines Inc planes entered would powered Cirrus engines sold sponsors Cirrus engine four-cylinder in-line manufactured Michigan under English patents Springfield Granvilles made plans enter new plane American Derby An engineer Bob Hail joined Granvilles 1929 rest Granville organization produced first Gee Bee Sportster Model X features airplane carried through rest Gee Bee Sportsters racers through 1934 Bob Hall later turn design talents World War 2 Grumman Aircraft Wing span Model X 25 feetsingle-place opencockpit monoplane powered inverted Cirrus engine developing 95 hp at2 100 rpm wing shape same used suc ceeding Gee Bee designs through 1933 Pilot new creation Lowell Bayles flown everything Jennies Ford trimotors After flying derby impressed performance little sportster bought own use fast safe dependable sport plane Production models Gee Bee X fitted engines Two GeeBees two pilots Right Granger Williams Z article Bill Turner GeeBee Miss Los Angeles especially builtboth now flying Most important factor excellent performance Grangers Z its light weight Its struc ture based closely upon Vein Clements CL planVein specialized GeeBees some 25 years side bottom views basic fuselage show root fairings tailor fuselage including 95hp Cirrus model B 95hp Menasco model C 125-hp Menasco model D 135-hp Ranger Model F Radial engined versions powered 1 10hp Warner model E new two-place Senior Sportater Gee Bee designated model Y larger D model 20% designed 210-hp Kinner 215hp Lycoming 240-hp Wright J6 Pratt & Whitney Wasp Jr 300 hp / outside GeeBee exactly like its big counterpart Lowell Bayles looked inside saw nothing like thisl Servos rud der aileron installed before 8oz tank located under neath side tank immediately behind firewall ciuser view uwe outaims uewne seiu -evident Uoi irue tie rod runs woss cockpit attach points wing wires Front view plan makes clear location fourservos Foamwrapped battery pack appears extreme right photo une psesure truy worth 1000 words Especially interesting treat ment landing gear arrangement functional scale rigging wires Proctor streamlined wire No 2 turnbuckles brace wing take sideloads gear Reaay-so-ve-coverea L evokes special feeling real aircraft K&B 40-sized series 71 tipped 20 degrees position working cyl inder between two dummy cylinders Plenty power Zinger 11-5 TATONE ENGINE MOUNT K 8 B 40 ENGINE AT 400 TILT PLASTIC WASP 9 CYL ENGINE FROM WILLIAMS BROS 3/32 X 3/8 BALSA PLANKING FORMER V16 WIRE TIE ROD ON TOP OF FORMER FORMER B B-i BALSA SHEET COWL RINGS OR FORMED FIBERGLASS 3/16 PLYWOOD FIREWALL BETWEEN LOUVERED CcYAL AND RADIAL ENGINE MOUNT ___7 A74fA CAL ~ GLIOC LOTf k77 7-9 A/C 1/8 BRASS TUBING INSIDE SHOCK SPRING METAL COVER GAP UNDER COWLING REAR RIM FOR AIR COOLING N N N BALSA BLOCKS 3/32 WIRE MAINS IAMS BROS 143 SMOOTH WHEELS 3/32 WIRE MAINMETAL PI\OT FORK STRUTBRACKETTURNBUCKLES ANCHOR 10 1/32 WIRE FIBERGLASS FNrS OR BALSA LAMiNATES 1/8 BALSA FORMS UNDER REMOVABLE HATCH AILERON BELLCRANKS FORMER D 1/16 X 3/16 BALSA FOR ALL STRINGERS FORMER E 3/16 SQ SPRUCE FIN POST 3/32 PLYVJCOD PROCTOR STREAMLINE WIRES / 1/16 SHEET BALSA CORE IN RUDDER AND STABILIZER 1/8 DOWEL TORQUE TUBES 1/32 PLY RUDDER HORNS 1/16 X 1/8 BALSA EDGE LAMINATES N WIRE BRACED STRUT TO SPAR BIKE SPOKE SCREW JACK ON 3/32 PLYWCOD PLATFORM ELEVATOR 8ELLCRANK ---- TAIL SKID WITH WHEEL AT BASE 1/16 PLYWOOD FILLET T E 1/8 X 1/2 BALSA TRAILING EDGES AILERON ROD DISCONNECT AILERON TORQUE WIRE 1/4 BALSA AILERON SPAR METAL CLIP ON SPAR FOR WING RIGGING WIRES 3/16 TRIANGULAR FILLETS 1/16 BALSA ALL WING RIBS I/8X 1/4 SPRUCE SPARS FRONT AND REAR 1/16 BALSA L E COVER TOP AND BOTTOM 1/8 PLYWDD WING TIPS I/16X 3/16 BALSA TIP BOW LAMINATED 1931 Bob Hall Zantford Granville designed new plane first strictly racing model model Z Rolled out shop August 22 1931 Gee Bee Z constructed using some duplicate modified parts used building model Ys Powered loaned Pratt & Whitney Wasp Jr engine used Laird Solution won 1930 Thompson Race basic fuselage structure welded chrome-moly tubing wing built wood using M6 airfoil cockpit cover ancestor bubble canopy transparent section fastened removable section top fuselage cover placed after pilot seated held position quick releas able fasteners inside cockpit Aircraft Product wheels brakes actuated full back position control stick directional brake control rudder pedals first day 1933 National Air Races Bob Hall won 25mile race Menasco-powered D model Zantford Granville fourth 30mile race flying Warnerpowered model E Mary Haislip Menasco powered D Maude Tait Warnerpowered E won second third two womens events Lowell Bayles won Shell qualifying event Z 26734 mph new record Bob Hall second 21386 model Y Rudder belicrank spring-loaded cables running aft rudder pushrod extreme left crank Passing over two pushrods engage horns attached aileron torque tubeplan detail shows uncommonly simple coupling arrangement inner torque tube wings Hubber-scale builders will appreciate photo looking aft stringers permit almost shell-like structure weight impor tant can no business basic boxes other popular crudi ties Note bushed pushrod guide also provides stiffening way wasand clearly dont have take word Tile shock strut covers thin aluminum Front view plan shows cross sections both built-up balsa boots Pants can hollowed balsa blocks Granger made two halves using plywood frames two layers glass clothhalves screw together Gear can permanently fixed detachabledetails text help detailed photo plans can duplicate actual strut arrangement real aircraftnote shock-absorbing coil spring Jr cylinders configured just two rings very simple arrangement designer advises loca tion center gravity must behind 18% wing chord FULL SIZE PLANS AVAILABLE SEE PAGE 128 Bayles won 50mile race Z Bob Hall second placeuntil hit water tower forced land two feet wing tip gone model Y Bob Hall won General Tire Trophy Z won mixed free-for-all race also Z Maude Tait won Aerol Trophy Y Lowell Bayles won Thompson Trophy race 23623 mph Z Bob Hall fourth Y too bad first year Gee Bee racing group November 1931 750-hp Pratt & Whit ney Wasp Sr engine installed Gee Bee Z attempt set new speed record Several tries made during November early December set record propeller engine problems kept completing required four passes over course December 5 Bayles flew Z about 1000 feet five miles course went dive gain speed As levelled out roared through course first pass airplane suddenly dipped level flight pulled up sharply right wing folded up Z rolled twice right before crashed exploded physical evidence scene motion pictures crash inspected frame frame leading conclusion loose gas cap started trouble Apparently cap flew off striking cockpit cover canopy shattered inward blinding Bayles causing him lose control Designer Bob Hall said Gee Bee sensitive longitudinally added stress dip pull-up caused right wing fall Speed time estimated excess 325 mph first unfortunate series mishaps exploited news papers hack writers seeking capitalize sensationalism Much information adapted book Gee Bee Story Charles Man drake additional information correc tions Bob Granville Building Model Gee Bee i tired same old quickly-built easy-flying muchmodified scale models never look like original airplaneyou ready take chal lenge exact scale model unusual airplane choose Gee Bee racer because intrigues everyone experts tells wont fly serious enough make exact scale say welcome exclusive group model builders fliers other hand people think scale models will fly unless redesign bigger tails dif ferent airfoils shorter landing gear some other abortive change because know original designer forget buddy talk same language afraid challenge exact scale model presents lousy pilot model Gee Bee Z exact scale proportions aerodynamic layout flying stability equal good high per fonnance model has flown will Continued page 106 ltttj1 . - - -t I .. j 77 j I -t I/ /\ Vh vrr1v II -~1 -A -~2 Painstaking attention engine c pro duced life-like P&W Particularly note Tamitiar trademark location case shaft well pushrod attachment case Plans show balsa ring cowl construction Granger used two-layer fiberglass shell aluminum ring back Granger Z recommends wheel land ings warns against 3-pointers Describes mod ification tires enabled ship take off concrete runways problem begin ning comments proper handling during roll-out after touchdown GeeBee lore fly Fast Combat now am wonder ing could pass along either Mr Hempel Mr Upton someone has experience jets What primarily need know current designs Jet Speed planes could get plans Also recommended Dyna Jet Raven Assuming arent kept secret what some reworking processes done jets make faster other cutting off air nozzle enlarging holes flowiector Dyna Jet Does Curtiss Dyna still make Dyna Jet Any information may able supply will greatly appreci ated Thank very much Cam Dix Ontario Canada have put Mr Dix touch Mike Langlois did wizard article CL Super Burp December 1978 issue MA publishes occasional state-of-the-art articles ob scure types models competition just such purposesto get data down somewhere long-lasting refer ences now possible bellowing sounds wafting across Cam s ho metown Don Mills entire pro vince Ontario yes under stand Curtiss still has Dyna Jets Al discount advertisers has offered item recently Likes Half-A Scale Just few lines let know think choice construction pro jects excellent particularly im pressed Wildcat Bowers SruH have around B-25 March issue would like encourage publish addi tional Frank Baker multisthat A-26 looks very interesting I C Sloane East Hanover NJ Alas JC dont weve got works Hurst cooking up Lockheed Air Express Gee Bee Z/Williams continued page 17 fly itself has no bad habits Landings best made wheel landings try three-point Quick rudder action roll-out necessary avoid ground ioops asphalt other hard surface tail-wheel comes contact small tail-wheel built end tailskid use hard-surfaced runways unable fly airplane off asphalt concrete until some special tires made grinding groove regular tires snapping 0 ring made polypropelene done allowing tires slide no takeoff problems experienced Full backstick required keep tail down push throttle open ease stick forward speed increases ship comes off little back stick 30 50 feet depending upon wind 106 Model Aviation Please send _______________ copies new 5th edition Radio Control Buyers Guide Enclosed $825 copy ordered $725 retail plus $100 postage handling City State ZIP _________________________________________ Return RC Buyers Guide Clifton House Clifton VA 22024 LOOKING FOR A BETTER FIELD BOX VIM RflY Look Aerotrend best market Tested approved reccomended RCM FM MAN magazines Flyin Box right made super durable fiberglas shipped completely assembled stor age bins flip-up plane supports folding legs wood boxesleft offer similar range features low low price Both types offered deluxe models built-In power panels other access ories SEND SA&E FOR FREE CATALOG SHOWING ALL OUR FINE PRODUCTS ST PROSPECT STREET AEROTREND PRODUCTS EAVEN CT 06515 2 $8995 Assembled condition Special tires necessary dirt grass important thing remember about model allow center gravity CG get behind recommended 18 percent wing chord back forward wing spar full-size Gee Bee racers lost 1935 CG limits ignored inexperienced pilot modified aircraft incorporate larger fuel tanks cross-country Bendix race Unfortunately accident blamed design airplane news media feel competent test fly model Gee Bee find good experi enced scale model flier help Believe expert pattern fliers qualified fly airplane Construction I started cutting out fuse lage bulkheads Below top longeron bulkheads made 3/32 sheet balsa 1/64 plywood glued side Temporarily glue X strip wood sides bulkheads top hold being glued top basswood longerons Pin building board carefully align square some other right-angle tool lower half fuselage built upside down board Glue bottom center basswood stringer place clamp pin bulkheads Recheck alignment Glue couple diagonal braces X basswood top bulkhead #A bottom bulkhead #D Now can lay rest medium-hard balsa stringers around fuse lage Fill between stringers 3/32 balsa strips indicated planking Let unit set day two Cut wing ribs out using patterns shown change alrfoil shape thickness racing plane trainer Assemble ribs spars proper order position Cement leading trailing edges place laminate wing tips basswood best results Cut 1/16 sheet balsa leading edge planking trim fit well Cement place sand leading edge proper shape Install aileron hinges torque rods plug-in dowels flying wire fittings landing gear will removable bend shape sewn bolted attachment fasten bulkheads glue ply wood root ribs place Make sure both correct angle want removable landing gear did make up angle brackets aluminum drill gear screw holes Bolt bulkheads bolt root ribs shaped wing-root fairings front bulkhead back made balsa block hollowed out 3/32 balsa planking Cracks low spots filled Maglc Patch similar materiaL Make front contoured section tween 3/16 plywood firewall bulkhead #A out balsa blocks thick sheet stock Hollow out about kness Remove STATEMENT OF OWNERSHIP MANAGEMENT ANO CIRCULATION Pq,dlt 399 SC 1681 1Tttaot PuOIoaton MODEL AVIATION Pobhcaton No 793d 2Date Flng Seotembet 14 1979 3FteooettooOtlssoe Motttflln No 01 Isaac PoEIofled Attnaalo 12 R Annual Sobsonptton Ptce $1600 4 Locatonotlnnossnottceol poblcasonlsteetotvcountostateandZlP codel Pttttetsl baN Ftseenth NI NW Puashttaton DC 2000N N Lopattolt Dl headDarets genetol bosness ol1ces PODISflPt pttttetsl GIN Ffteetth Dl NW WashngtOn DC 2DOON 6 Nattles Potnelete adanesses 01 Puhltsflet Edtpt Manaattg hdtot Pobnshe Cal S Wheeln 6th FIteentflht NWPlaahinglonDC2DSTN PatIo Wllatt 4 Wnte 815 Ftteenth Nt NW WashndtDn DC 20005 Manaona Edto NONE 7 Opane Apadetnto 01 Model Oeonaotcs St N Flteetth Nt asflngtot DC 2OGGN Known Nondholdets tnontaaaees Othet secuttp holdets 0othflg ot hold nul%otttoneottotalantoontotbondsmottgagesot otnelsacottles NONE 9 Fotcotnptetonbononptott otganoatottsaothotoedtomal aIspactal tates lNePsOn 132 122 PDMI outoose lnnpton noonofI 01 ths otganaa tSc enempt stab tot Fedeta noonte tao PuPosps haun hhanaeadutna PtePedtng 12 noontha ID F slant Nato, oIC,ootaton 601001 Aoeaoeno popes no nopnsol sndle do,ngpoElshed ptnpedngneatest l2tnonthstlnodate ATotal No Copes P,nted Net Pesa SonI5467262275 SPaOCtcoatnn 1hal ea thtoooh Oealns Cattets Ntpot Vendots Coontet Dalpa2175 2252 2Mal hohscnpsons4h664h61d6 CTotal Pad C,colaton4913959290 OFteeosttEosonhhMalcattet otOthat Means hampton Contpltnentatoand Othe Fee CoPtes28062212 CTotalDatnEotonlhotnotC&DI5294761610 FCopesNoOst,Noted 1Ott Ce Use Left Ooet Unapononted Opo led alte Pt nI ny1 429653 2Rotons toot howl Agents28612 OTotailNotnot FF1 and2 Ptouldeooa help less ton shownn Al5467262275 11 lpetttothafthasoatomPntsntadehhmPabOoeatpoottePt andoomplete CARLO PInFELCY Puhltahat fuselage structure building board cement contoured section place Place waxed paper top longerons back #D bulkhead pin upper sections bulkheads place Plank top fuse lage back cockpit headrest build adjustable unit indi cated cement stabilizer positive angle degree Leading edge up about 1/16 Build up vertical fin laminated leading edge airplane spent much time its back during asphalt takeoff attempts upper fin strengthened repalred several times Make tail-skid movable rudder control install small tall-wheel expect operate off hard-surface runway scale landing gear shock system works well made per plan Install englne radial mount suit engine Mine tipped 20 degrees right position working engine cylinder between two dummy cylinders scale engine 40-size series 71 K & B engine provides plenty power 115 Zinger prop fuel tank installed directly behind firewall left side fuselage after aileron rudder servos mounted Servos installed directly behind firewall under alongside 8-ounce tank receiver behind bulkhead #A battery pack located will balance aircraft Mine behind receiver extra weight adjustable stabilizer may have farther forward Rubber bands hold battery receiver place plenty foam wrap Lou Proctors streamlined wire #2 turnbuckles used rigging upper rigging wings attaches piece music wire across fuselage longerons Rig degree two wash-out both wings will some flexing torque rods ailerons no amount sloppiness should allowed 1/16 music wire pushrod supported center used elevator control Cables small stiff spring used rudder control Rudder bellcrank length critical link servo should just outside cable attachment point top fuselage hatch held place back internal rubber band front modified Dzues fastener Wheel pants could made hollowed balsa blocks However used two layers fiberglass cloth plywood frames allow pant halves screwed together cowling could made up balsa rings prefer two layers fiberglass cloth aluminum ring about 1/16 X 1/2 glassed back Drill screw holes through attachment stand-off fittings fastened firewall model covered natural Coverite except rudder stabilizer elevators covered Silkspan Several light coats clear Sig dope applied sanded Sig Cub yellow dope sprayed three coats lightly sanded weave cloth should still visible finished except metal covering simulated planking Scalloping numbers masked off sprayed Sig black dope Use 1/16-in wide red striping tape separation black yellow scalloping around numbers small lettering generally black except Springfield Air Racing Association Inc Powered P&W Wasp Hartahorn Steel Tie Rods Supersportster Aircraft Products Wheels & Brakes red Also red edging around Gee Bee rudder N77V Unless good small lettering striping unlikely will come up 108 Model Aviation MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS
Edition: Model Aviation - 1979/12
Page Numbers: 10, 11, 12, 13, 14, 15, 16, 17, 106, 108, 110
NO OCR TEXT NO OCR TEXT THE history aviation has produced few men enough courage gamble convictions Wright Brothers Glenn Curt iss Tony Fokker Clyde Cessna Giuseppe Bel lanca Don Douglas Walt Beech Jack Northrop some Granville Brothers Gee Bees remarkable aircraft con tributed greatly advancement aerody namic engineering Granvilles innovations used other aircraft years Yet news media jumped misfortunes befalling built aircraft blowing mishap completely out proportion actuality expanding news accidents catas trophy contributed downfall Granville Brothers Aircraft Company crashes involving Gee Bee aircraft human fail ure pilot error contributed mech anical failures secondary factor Gee Bees aircraft originally designed flown good airplanes Only modified greater horsepower fuel tankage did get trouble stability problems changes authorized manufac turer Most people under impression Doolittle successfully fly Gee Bee R1 flew time Thompson Trophy race fact R1 racer test-flown number times Russell Boardman before Doolittle saw airplanes Doolittle flew R1 several times before Thompson race qualifying racer dedicated scale man 40powered model exact scale version real City Spring fieldeven aerodynamic set-up Granger Williams Shell event trying establish worlds speed record Other pilots flew Gee Bee racers included Lee Gehlbach Russell Thaw Roy Minor Jimmy Haislip Lee Gehlback test flew R2 flew both Bendix Thompson races first aircraft produced Granvilles 1929 small two place biplane side-byside seating Powered 60-hp Velie M5 engine unusual feature adjustable wing flap could changed flight various angles allowed unusually low landing speed still gave good flying perfor mance factory set up company turned building model Biplanes Early 1930 American Flying Derby organized sponsored American Cirrus Engines Inc planes entered would powered Cirrus engines sold sponsors Cirrus engine four-cylinder in-line manufactured Michigan under English patents Springfield Granvilles made plans enter new plane American Derby An engineer Bob Hail joined Granvilles 1929 rest Granville organization produced first Gee Bee Sportster Model X features airplane carried through rest Gee Bee Sportsters racers through 1934 Bob Hall later turn design talents World War 2 Grumman Aircraft Wing span Model X 25 feetsingle-place opencockpit monoplane powered inverted Cirrus engine developing 95 hp at2 100 rpm wing shape same used suc ceeding Gee Bee designs through 1933 Pilot new creation Lowell Bayles flown everything Jennies Ford trimotors After flying derby impressed performance little sportster bought own use fast safe dependable sport plane Production models Gee Bee X fitted engines Two GeeBees two pilots Right Granger Williams Z article Bill Turner GeeBee Miss Los Angeles especially builtboth now flying Most important factor excellent performance Grangers Z its light weight Its struc ture based closely upon Vein Clements CL planVein specialized GeeBees some 25 years side bottom views basic fuselage show root fairings tailor fuselage including 95hp Cirrus model B 95hp Menasco model C 125-hp Menasco model D 135-hp Ranger Model F Radial engined versions powered 1 10hp Warner model E new two-place Senior Sportater Gee Bee designated model Y larger D model 20% designed 210-hp Kinner 215hp Lycoming 240-hp Wright J6 Pratt & Whitney Wasp Jr 300 hp / outside GeeBee exactly like its big counterpart Lowell Bayles looked inside saw nothing like thisl Servos rud der aileron installed before 8oz tank located under neath side tank immediately behind firewall ciuser view uwe outaims uewne seiu -evident Uoi irue tie rod runs woss cockpit attach points wing wires Front view plan makes clear location fourservos Foamwrapped battery pack appears extreme right photo une psesure truy worth 1000 words Especially interesting treat ment landing gear arrangement functional scale rigging wires Proctor streamlined wire No 2 turnbuckles brace wing take sideloads gear Reaay-so-ve-coverea L evokes special feeling real aircraft K&B 40-sized series 71 tipped 20 degrees position working cyl inder between two dummy cylinders Plenty power Zinger 11-5 TATONE ENGINE MOUNT K 8 B 40 ENGINE AT 400 TILT PLASTIC WASP 9 CYL ENGINE FROM WILLIAMS BROS 3/32 X 3/8 BALSA PLANKING FORMER V16 WIRE TIE ROD ON TOP OF FORMER FORMER B B-i BALSA SHEET COWL RINGS OR FORMED FIBERGLASS 3/16 PLYWOOD FIREWALL BETWEEN LOUVERED CcYAL AND RADIAL ENGINE MOUNT ___7 A74fA CAL ~ GLIOC LOTf k77 7-9 A/C 1/8 BRASS TUBING INSIDE SHOCK SPRING METAL COVER GAP UNDER COWLING REAR RIM FOR AIR COOLING N N N BALSA BLOCKS 3/32 WIRE MAINS IAMS BROS 143 SMOOTH WHEELS 3/32 WIRE MAINMETAL PI\OT FORK STRUTBRACKETTURNBUCKLES ANCHOR 10 1/32 WIRE FIBERGLASS FNrS OR BALSA LAMiNATES 1/8 BALSA FORMS UNDER REMOVABLE HATCH AILERON BELLCRANKS FORMER D 1/16 X 3/16 BALSA FOR ALL STRINGERS FORMER E 3/16 SQ SPRUCE FIN POST 3/32 PLYVJCOD PROCTOR STREAMLINE WIRES / 1/16 SHEET BALSA CORE IN RUDDER AND STABILIZER 1/8 DOWEL TORQUE TUBES 1/32 PLY RUDDER HORNS 1/16 X 1/8 BALSA EDGE LAMINATES N WIRE BRACED STRUT TO SPAR BIKE SPOKE SCREW JACK ON 3/32 PLYWCOD PLATFORM ELEVATOR 8ELLCRANK ---- TAIL SKID WITH WHEEL AT BASE 1/16 PLYWOOD FILLET T E 1/8 X 1/2 BALSA TRAILING EDGES AILERON ROD DISCONNECT AILERON TORQUE WIRE 1/4 BALSA AILERON SPAR METAL CLIP ON SPAR FOR WING RIGGING WIRES 3/16 TRIANGULAR FILLETS 1/16 BALSA ALL WING RIBS I/8X 1/4 SPRUCE SPARS FRONT AND REAR 1/16 BALSA L E COVER TOP AND BOTTOM 1/8 PLYWDD WING TIPS I/16X 3/16 BALSA TIP BOW LAMINATED 1931 Bob Hall Zantford Granville designed new plane first strictly racing model model Z Rolled out shop August 22 1931 Gee Bee Z constructed using some duplicate modified parts used building model Ys Powered loaned Pratt & Whitney Wasp Jr engine used Laird Solution won 1930 Thompson Race basic fuselage structure welded chrome-moly tubing wing built wood using M6 airfoil cockpit cover ancestor bubble canopy transparent section fastened removable section top fuselage cover placed after pilot seated held position quick releas able fasteners inside cockpit Aircraft Product wheels brakes actuated full back position control stick directional brake control rudder pedals first day 1933 National Air Races Bob Hall won 25mile race Menasco-powered D model Zantford Granville fourth 30mile race flying Warnerpowered model E Mary Haislip Menasco powered D Maude Tait Warnerpowered E won second third two womens events Lowell Bayles won Shell qualifying event Z 26734 mph new record Bob Hall second 21386 model Y Rudder belicrank spring-loaded cables running aft rudder pushrod extreme left crank Passing over two pushrods engage horns attached aileron torque tubeplan detail shows uncommonly simple coupling arrangement inner torque tube wings Hubber-scale builders will appreciate photo looking aft stringers permit almost shell-like structure weight impor tant can no business basic boxes other popular crudi ties Note bushed pushrod guide also provides stiffening way wasand clearly dont have take word Tile shock strut covers thin aluminum Front view plan shows cross sections both built-up balsa boots Pants can hollowed balsa blocks Granger made two halves using plywood frames two layers glass clothhalves screw together Gear can permanently fixed detachabledetails text help detailed photo plans can duplicate actual strut arrangement real aircraftnote shock-absorbing coil spring Jr cylinders configured just two rings very simple arrangement designer advises loca tion center gravity must behind 18% wing chord FULL SIZE PLANS AVAILABLE SEE PAGE 128 Bayles won 50mile race Z Bob Hall second placeuntil hit water tower forced land two feet wing tip gone model Y Bob Hall won General Tire Trophy Z won mixed free-for-all race also Z Maude Tait won Aerol Trophy Y Lowell Bayles won Thompson Trophy race 23623 mph Z Bob Hall fourth Y too bad first year Gee Bee racing group November 1931 750-hp Pratt & Whit ney Wasp Sr engine installed Gee Bee Z attempt set new speed record Several tries made during November early December set record propeller engine problems kept completing required four passes over course December 5 Bayles flew Z about 1000 feet five miles course went dive gain speed As levelled out roared through course first pass airplane suddenly dipped level flight pulled up sharply right wing folded up Z rolled twice right before crashed exploded physical evidence scene motion pictures crash inspected frame frame leading conclusion loose gas cap started trouble Apparently cap flew off striking cockpit cover canopy shattered inward blinding Bayles causing him lose control Designer Bob Hall said Gee Bee sensitive longitudinally added stress dip pull-up caused right wing fall Speed time estimated excess 325 mph first unfortunate series mishaps exploited news papers hack writers seeking capitalize sensationalism Much information adapted book Gee Bee Story Charles Man drake additional information correc tions Bob Granville Building Model Gee Bee i tired same old quickly-built easy-flying muchmodified scale models never look like original airplaneyou ready take chal lenge exact scale model unusual airplane choose Gee Bee racer because intrigues everyone experts tells wont fly serious enough make exact scale say welcome exclusive group model builders fliers other hand people think scale models will fly unless redesign bigger tails dif ferent airfoils shorter landing gear some other abortive change because know original designer forget buddy talk same language afraid challenge exact scale model presents lousy pilot model Gee Bee Z exact scale proportions aerodynamic layout flying stability equal good high per fonnance model has flown will Continued page 106 ltttj1 . - - -t I .. j 77 j I -t I/ /\ Vh vrr1v II -~1 -A -~2 Painstaking attention engine c pro duced life-like P&W Particularly note Tamitiar trademark location case shaft well pushrod attachment case Plans show balsa ring cowl construction Granger used two-layer fiberglass shell aluminum ring back Granger Z recommends wheel land ings warns against 3-pointers Describes mod ification tires enabled ship take off concrete runways problem begin ning comments proper handling during roll-out after touchdown GeeBee lore fly Fast Combat now am wonder ing could pass along either Mr Hempel Mr Upton someone has experience jets What primarily need know current designs Jet Speed planes could get plans Also recommended Dyna Jet Raven Assuming arent kept secret what some reworking processes done jets make faster other cutting off air nozzle enlarging holes flowiector Dyna Jet Does Curtiss Dyna still make Dyna Jet Any information may able supply will greatly appreci ated Thank very much Cam Dix Ontario Canada have put Mr Dix touch Mike Langlois did wizard article CL Super Burp December 1978 issue MA publishes occasional state-of-the-art articles ob scure types models competition just such purposesto get data down somewhere long-lasting refer ences now possible bellowing sounds wafting across Cam s ho metown Don Mills entire pro vince Ontario yes under stand Curtiss still has Dyna Jets Al discount advertisers has offered item recently Likes Half-A Scale Just few lines let know think choice construction pro jects excellent particularly im pressed Wildcat Bowers SruH have around B-25 March issue would like encourage publish addi tional Frank Baker multisthat A-26 looks very interesting I C Sloane East Hanover NJ Alas JC dont weve got works Hurst cooking up Lockheed Air Express Gee Bee Z/Williams continued page 17 fly itself has no bad habits Landings best made wheel landings try three-point Quick rudder action roll-out necessary avoid ground ioops asphalt other hard surface tail-wheel comes contact small tail-wheel built end tailskid use hard-surfaced runways unable fly airplane off asphalt concrete until some special tires made grinding groove regular tires snapping 0 ring made polypropelene done allowing tires slide no takeoff problems experienced Full backstick required keep tail down push throttle open ease stick forward speed increases ship comes off little back stick 30 50 feet depending upon wind 106 Model Aviation Please send _______________ copies new 5th edition Radio Control Buyers Guide Enclosed $825 copy ordered $725 retail plus $100 postage handling City State ZIP _________________________________________ Return RC Buyers Guide Clifton House Clifton VA 22024 LOOKING FOR A BETTER FIELD BOX VIM RflY Look Aerotrend best market Tested approved reccomended RCM FM MAN magazines Flyin Box right made super durable fiberglas shipped completely assembled stor age bins flip-up plane supports folding legs wood boxesleft offer similar range features low low price Both types offered deluxe models built-In power panels other access ories SEND SA&E FOR FREE CATALOG SHOWING ALL OUR FINE PRODUCTS ST PROSPECT STREET AEROTREND PRODUCTS EAVEN CT 06515 2 $8995 Assembled condition Special tires necessary dirt grass important thing remember about model allow center gravity CG get behind recommended 18 percent wing chord back forward wing spar full-size Gee Bee racers lost 1935 CG limits ignored inexperienced pilot modified aircraft incorporate larger fuel tanks cross-country Bendix race Unfortunately accident blamed design airplane news media feel competent test fly model Gee Bee find good experi enced scale model flier help Believe expert pattern fliers qualified fly airplane Construction I started cutting out fuse lage bulkheads Below top longeron bulkheads made 3/32 sheet balsa 1/64 plywood glued side Temporarily glue X strip wood sides bulkheads top hold being glued top basswood longerons Pin building board carefully align square some other right-angle tool lower half fuselage built upside down board Glue bottom center basswood stringer place clamp pin bulkheads Recheck alignment Glue couple diagonal braces X basswood top bulkhead #A bottom bulkhead #D Now can lay rest medium-hard balsa stringers around fuse lage Fill between stringers 3/32 balsa strips indicated planking Let unit set day two Cut wing ribs out using patterns shown change alrfoil shape thickness racing plane trainer Assemble ribs spars proper order position Cement leading trailing edges place laminate wing tips basswood best results Cut 1/16 sheet balsa leading edge planking trim fit well Cement place sand leading edge proper shape Install aileron hinges torque rods plug-in dowels flying wire fittings landing gear will removable bend shape sewn bolted attachment fasten bulkheads glue ply wood root ribs place Make sure both correct angle want removable landing gear did make up angle brackets aluminum drill gear screw holes Bolt bulkheads bolt root ribs shaped wing-root fairings front bulkhead back made balsa block hollowed out 3/32 balsa planking Cracks low spots filled Maglc Patch similar materiaL Make front contoured section tween 3/16 plywood firewall bulkhead #A out balsa blocks thick sheet stock Hollow out about kness Remove STATEMENT OF OWNERSHIP MANAGEMENT ANO CIRCULATION Pq,dlt 399 SC 1681 1Tttaot PuOIoaton MODEL AVIATION Pobhcaton No 793d 2Date Flng Seotembet 14 1979 3FteooettooOtlssoe Motttflln No 01 Isaac PoEIofled Attnaalo 12 R Annual Sobsonptton Ptce $1600 4 Locatonotlnnossnottceol poblcasonlsteetotvcountostateandZlP codel Pttttetsl baN Ftseenth NI NW Puashttaton DC 2000N N Lopattolt Dl headDarets genetol bosness ol1ces PODISflPt pttttetsl GIN Ffteetth Dl NW WashngtOn DC 2DOON 6 Nattles Potnelete adanesses 01 Puhltsflet Edtpt Manaattg hdtot Pobnshe Cal S Wheeln 6th FIteentflht NWPlaahinglonDC2DSTN PatIo Wllatt 4 Wnte 815 Ftteenth Nt NW WashndtDn DC 20005 Manaona Edto NONE 7 Opane Apadetnto 01 Model Oeonaotcs St N Flteetth Nt asflngtot DC 2OGGN Known Nondholdets tnontaaaees Othet secuttp holdets 0othflg ot hold nul%otttoneottotalantoontotbondsmottgagesot otnelsacottles NONE 9 Fotcotnptetonbononptott otganoatottsaothotoedtomal aIspactal tates lNePsOn 132 122 PDMI outoose lnnpton noonofI 01 ths otganaa tSc enempt stab tot Fedeta noonte tao PuPosps haun hhanaeadutna PtePedtng 12 noontha ID F slant Nato, oIC,ootaton 601001 Aoeaoeno popes no nopnsol sndle do,ngpoElshed ptnpedngneatest l2tnonthstlnodate ATotal No Copes P,nted Net Pesa SonI5467262275 SPaOCtcoatnn 1hal ea thtoooh Oealns Cattets Ntpot Vendots Coontet Dalpa2175 2252 2Mal hohscnpsons4h664h61d6 CTotal Pad C,colaton4913959290 OFteeosttEosonhhMalcattet otOthat Means hampton Contpltnentatoand Othe Fee CoPtes28062212 CTotalDatnEotonlhotnotC&DI5294761610 FCopesNoOst,Noted 1Ott Ce Use Left Ooet Unapononted Opo led alte Pt nI ny1 429653 2Rotons toot howl Agents28612 OTotailNotnot FF1 and2 Ptouldeooa help less ton shownn Al5467262275 11 lpetttothafthasoatomPntsntadehhmPabOoeatpoottePt andoomplete CARLO PInFELCY Puhltahat fuselage structure building board cement contoured section place Place waxed paper top longerons back #D bulkhead pin upper sections bulkheads place Plank top fuse lage back cockpit headrest build adjustable unit indi cated cement stabilizer positive angle degree Leading edge up about 1/16 Build up vertical fin laminated leading edge airplane spent much time its back during asphalt takeoff attempts upper fin strengthened repalred several times Make tail-skid movable rudder control install small tall-wheel expect operate off hard-surface runway scale landing gear shock system works well made per plan Install englne radial mount suit engine Mine tipped 20 degrees right position working engine cylinder between two dummy cylinders scale engine 40-size series 71 K & B engine provides plenty power 115 Zinger prop fuel tank installed directly behind firewall left side fuselage after aileron rudder servos mounted Servos installed directly behind firewall under alongside 8-ounce tank receiver behind bulkhead #A battery pack located will balance aircraft Mine behind receiver extra weight adjustable stabilizer may have farther forward Rubber bands hold battery receiver place plenty foam wrap Lou Proctors streamlined wire #2 turnbuckles used rigging upper rigging wings attaches piece music wire across fuselage longerons Rig degree two wash-out both wings will some flexing torque rods ailerons no amount sloppiness should allowed 1/16 music wire pushrod supported center used elevator control Cables small stiff spring used rudder control Rudder bellcrank length critical link servo should just outside cable attachment point top fuselage hatch held place back internal rubber band front modified Dzues fastener Wheel pants could made hollowed balsa blocks However used two layers fiberglass cloth plywood frames allow pant halves screwed together cowling could made up balsa rings prefer two layers fiberglass cloth aluminum ring about 1/16 X 1/2 glassed back Drill screw holes through attachment stand-off fittings fastened firewall model covered natural Coverite except rudder stabilizer elevators covered Silkspan Several light coats clear Sig dope applied sanded Sig Cub yellow dope sprayed three coats lightly sanded weave cloth should still visible finished except metal covering simulated planking Scalloping numbers masked off sprayed Sig black dope Use 1/16-in wide red striping tape separation black yellow scalloping around numbers small lettering generally black except Springfield Air Racing Association Inc Powered P&W Wasp Hartahorn Steel Tie Rods Supersportster Aircraft Products Wheels & Brakes red Also red edging around Gee Bee rudder N77V Unless good small lettering striping unlikely will come up 108 Model Aviation MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS
Edition: Model Aviation - 1979/12
Page Numbers: 10, 11, 12, 13, 14, 15, 16, 17, 106, 108, 110
NO OCR TEXT NO OCR TEXT THE history aviation has produced few men enough courage gamble convictions Wright Brothers Glenn Curt iss Tony Fokker Clyde Cessna Giuseppe Bel lanca Don Douglas Walt Beech Jack Northrop some Granville Brothers Gee Bees remarkable aircraft con tributed greatly advancement aerody namic engineering Granvilles innovations used other aircraft years Yet news media jumped misfortunes befalling built aircraft blowing mishap completely out proportion actuality expanding news accidents catas trophy contributed downfall Granville Brothers Aircraft Company crashes involving Gee Bee aircraft human fail ure pilot error contributed mech anical failures secondary factor Gee Bees aircraft originally designed flown good airplanes Only modified greater horsepower fuel tankage did get trouble stability problems changes authorized manufac turer Most people under impression Doolittle successfully fly Gee Bee R1 flew time Thompson Trophy race fact R1 racer test-flown number times Russell Boardman before Doolittle saw airplanes Doolittle flew R1 several times before Thompson race qualifying racer dedicated scale man 40powered model exact scale version real City Spring fieldeven aerodynamic set-up Granger Williams Shell event trying establish worlds speed record Other pilots flew Gee Bee racers included Lee Gehlbach Russell Thaw Roy Minor Jimmy Haislip Lee Gehlback test flew R2 flew both Bendix Thompson races first aircraft produced Granvilles 1929 small two place biplane side-byside seating Powered 60-hp Velie M5 engine unusual feature adjustable wing flap could changed flight various angles allowed unusually low landing speed still gave good flying perfor mance factory set up company turned building model Biplanes Early 1930 American Flying Derby organized sponsored American Cirrus Engines Inc planes entered would powered Cirrus engines sold sponsors Cirrus engine four-cylinder in-line manufactured Michigan under English patents Springfield Granvilles made plans enter new plane American Derby An engineer Bob Hail joined Granvilles 1929 rest Granville organization produced first Gee Bee Sportster Model X features airplane carried through rest Gee Bee Sportsters racers through 1934 Bob Hall later turn design talents World War 2 Grumman Aircraft Wing span Model X 25 feetsingle-place opencockpit monoplane powered inverted Cirrus engine developing 95 hp at2 100 rpm wing shape same used suc ceeding Gee Bee designs through 1933 Pilot new creation Lowell Bayles flown everything Jennies Ford trimotors After flying derby impressed performance little sportster bought own use fast safe dependable sport plane Production models Gee Bee X fitted engines Two GeeBees two pilots Right Granger Williams Z article Bill Turner GeeBee Miss Los Angeles especially builtboth now flying Most important factor excellent performance Grangers Z its light weight Its struc ture based closely upon Vein Clements CL planVein specialized GeeBees some 25 years side bottom views basic fuselage show root fairings tailor fuselage including 95hp Cirrus model B 95hp Menasco model C 125-hp Menasco model D 135-hp Ranger Model F Radial engined versions powered 1 10hp Warner model E new two-place Senior Sportater Gee Bee designated model Y larger D model 20% designed 210-hp Kinner 215hp Lycoming 240-hp Wright J6 Pratt & Whitney Wasp Jr 300 hp / outside GeeBee exactly like its big counterpart Lowell Bayles looked inside saw nothing like thisl Servos rud der aileron installed before 8oz tank located under neath side tank immediately behind firewall ciuser view uwe outaims uewne seiu -evident Uoi irue tie rod runs woss cockpit attach points wing wires Front view plan makes clear location fourservos Foamwrapped battery pack appears extreme right photo une psesure truy worth 1000 words Especially interesting treat ment landing gear arrangement functional scale rigging wires Proctor streamlined wire No 2 turnbuckles brace wing take sideloads gear Reaay-so-ve-coverea L evokes special feeling real aircraft K&B 40-sized series 71 tipped 20 degrees position working cyl inder between two dummy cylinders Plenty power Zinger 11-5 TATONE ENGINE MOUNT K 8 B 40 ENGINE AT 400 TILT PLASTIC WASP 9 CYL ENGINE FROM WILLIAMS BROS 3/32 X 3/8 BALSA PLANKING FORMER V16 WIRE TIE ROD ON TOP OF FORMER FORMER B B-i BALSA SHEET COWL RINGS OR FORMED FIBERGLASS 3/16 PLYWOOD FIREWALL BETWEEN LOUVERED CcYAL AND RADIAL ENGINE MOUNT ___7 A74fA CAL ~ GLIOC LOTf k77 7-9 A/C 1/8 BRASS TUBING INSIDE SHOCK SPRING METAL COVER GAP UNDER COWLING REAR RIM FOR AIR COOLING N N N BALSA BLOCKS 3/32 WIRE MAINS IAMS BROS 143 SMOOTH WHEELS 3/32 WIRE MAINMETAL PI\OT FORK STRUTBRACKETTURNBUCKLES ANCHOR 10 1/32 WIRE FIBERGLASS FNrS OR BALSA LAMiNATES 1/8 BALSA FORMS UNDER REMOVABLE HATCH AILERON BELLCRANKS FORMER D 1/16 X 3/16 BALSA FOR ALL STRINGERS FORMER E 3/16 SQ SPRUCE FIN POST 3/32 PLYVJCOD PROCTOR STREAMLINE WIRES / 1/16 SHEET BALSA CORE IN RUDDER AND STABILIZER 1/8 DOWEL TORQUE TUBES 1/32 PLY RUDDER HORNS 1/16 X 1/8 BALSA EDGE LAMINATES N WIRE BRACED STRUT TO SPAR BIKE SPOKE SCREW JACK ON 3/32 PLYWCOD PLATFORM ELEVATOR 8ELLCRANK ---- TAIL SKID WITH WHEEL AT BASE 1/16 PLYWOOD FILLET T E 1/8 X 1/2 BALSA TRAILING EDGES AILERON ROD DISCONNECT AILERON TORQUE WIRE 1/4 BALSA AILERON SPAR METAL CLIP ON SPAR FOR WING RIGGING WIRES 3/16 TRIANGULAR FILLETS 1/16 BALSA ALL WING RIBS I/8X 1/4 SPRUCE SPARS FRONT AND REAR 1/16 BALSA L E COVER TOP AND BOTTOM 1/8 PLYWDD WING TIPS I/16X 3/16 BALSA TIP BOW LAMINATED 1931 Bob Hall Zantford Granville designed new plane first strictly racing model model Z Rolled out shop August 22 1931 Gee Bee Z constructed using some duplicate modified parts used building model Ys Powered loaned Pratt & Whitney Wasp Jr engine used Laird Solution won 1930 Thompson Race basic fuselage structure welded chrome-moly tubing wing built wood using M6 airfoil cockpit cover ancestor bubble canopy transparent section fastened removable section top fuselage cover placed after pilot seated held position quick releas able fasteners inside cockpit Aircraft Product wheels brakes actuated full back position control stick directional brake control rudder pedals first day 1933 National Air Races Bob Hall won 25mile race Menasco-powered D model Zantford Granville fourth 30mile race flying Warnerpowered model E Mary Haislip Menasco powered D Maude Tait Warnerpowered E won second third two womens events Lowell Bayles won Shell qualifying event Z 26734 mph new record Bob Hall second 21386 model Y Rudder belicrank spring-loaded cables running aft rudder pushrod extreme left crank Passing over two pushrods engage horns attached aileron torque tubeplan detail shows uncommonly simple coupling arrangement inner torque tube wings Hubber-scale builders will appreciate photo looking aft stringers permit almost shell-like structure weight impor tant can no business basic boxes other popular crudi ties Note bushed pushrod guide also provides stiffening way wasand clearly dont have take word Tile shock strut covers thin aluminum Front view plan shows cross sections both built-up balsa boots Pants can hollowed balsa blocks Granger made two halves using plywood frames two layers glass clothhalves screw together Gear can permanently fixed detachabledetails text help detailed photo plans can duplicate actual strut arrangement real aircraftnote shock-absorbing coil spring Jr cylinders configured just two rings very simple arrangement designer advises loca tion center gravity must behind 18% wing chord FULL SIZE PLANS AVAILABLE SEE PAGE 128 Bayles won 50mile race Z Bob Hall second placeuntil hit water tower forced land two feet wing tip gone model Y Bob Hall won General Tire Trophy Z won mixed free-for-all race also Z Maude Tait won Aerol Trophy Y Lowell Bayles won Thompson Trophy race 23623 mph Z Bob Hall fourth Y too bad first year Gee Bee racing group November 1931 750-hp Pratt & Whit ney Wasp Sr engine installed Gee Bee Z attempt set new speed record Several tries made during November early December set record propeller engine problems kept completing required four passes over course December 5 Bayles flew Z about 1000 feet five miles course went dive gain speed As levelled out roared through course first pass airplane suddenly dipped level flight pulled up sharply right wing folded up Z rolled twice right before crashed exploded physical evidence scene motion pictures crash inspected frame frame leading conclusion loose gas cap started trouble Apparently cap flew off striking cockpit cover canopy shattered inward blinding Bayles causing him lose control Designer Bob Hall said Gee Bee sensitive longitudinally added stress dip pull-up caused right wing fall Speed time estimated excess 325 mph first unfortunate series mishaps exploited news papers hack writers seeking capitalize sensationalism Much information adapted book Gee Bee Story Charles Man drake additional information correc tions Bob Granville Building Model Gee Bee i tired same old quickly-built easy-flying muchmodified scale models never look like original airplaneyou ready take chal lenge exact scale model unusual airplane choose Gee Bee racer because intrigues everyone experts tells wont fly serious enough make exact scale say welcome exclusive group model builders fliers other hand people think scale models will fly unless redesign bigger tails dif ferent airfoils shorter landing gear some other abortive change because know original designer forget buddy talk same language afraid challenge exact scale model presents lousy pilot model Gee Bee Z exact scale proportions aerodynamic layout flying stability equal good high per fonnance model has flown will Continued page 106 ltttj1 . - - -t I .. j 77 j I -t I/ /\ Vh vrr1v II -~1 -A -~2 Painstaking attention engine c pro duced life-like P&W Particularly note Tamitiar trademark location case shaft well pushrod attachment case Plans show balsa ring cowl construction Granger used two-layer fiberglass shell aluminum ring back Granger Z recommends wheel land ings warns against 3-pointers Describes mod ification tires enabled ship take off concrete runways problem begin ning comments proper handling during roll-out after touchdown GeeBee lore fly Fast Combat now am wonder ing could pass along either Mr Hempel Mr Upton someone has experience jets What primarily need know current designs Jet Speed planes could get plans Also recommended Dyna Jet Raven Assuming arent kept secret what some reworking processes done jets make faster other cutting off air nozzle enlarging holes flowiector Dyna Jet Does Curtiss Dyna still make Dyna Jet Any information may able supply will greatly appreci ated Thank very much Cam Dix Ontario Canada have put Mr Dix touch Mike Langlois did wizard article CL Super Burp December 1978 issue MA publishes occasional state-of-the-art articles ob scure types models competition just such purposesto get data down somewhere long-lasting refer ences now possible bellowing sounds wafting across Cam s ho metown Don Mills entire pro vince Ontario yes under stand Curtiss still has Dyna Jets Al discount advertisers has offered item recently Likes Half-A Scale Just few lines let know think choice construction pro jects excellent particularly im pressed Wildcat Bowers SruH have around B-25 March issue would like encourage publish addi tional Frank Baker multisthat A-26 looks very interesting I C Sloane East Hanover NJ Alas JC dont weve got works Hurst cooking up Lockheed Air Express Gee Bee Z/Williams continued page 17 fly itself has no bad habits Landings best made wheel landings try three-point Quick rudder action roll-out necessary avoid ground ioops asphalt other hard surface tail-wheel comes contact small tail-wheel built end tailskid use hard-surfaced runways unable fly airplane off asphalt concrete until some special tires made grinding groove regular tires snapping 0 ring made polypropelene done allowing tires slide no takeoff problems experienced Full backstick required keep tail down push throttle open ease stick forward speed increases ship comes off little back stick 30 50 feet depending upon wind 106 Model Aviation Please send _______________ copies new 5th edition Radio Control Buyers Guide Enclosed $825 copy ordered $725 retail plus $100 postage handling City State ZIP _________________________________________ Return RC Buyers Guide Clifton House Clifton VA 22024 LOOKING FOR A BETTER FIELD BOX VIM RflY Look Aerotrend best market Tested approved reccomended RCM FM MAN magazines Flyin Box right made super durable fiberglas shipped completely assembled stor age bins flip-up plane supports folding legs wood boxesleft offer similar range features low low price Both types offered deluxe models built-In power panels other access ories SEND SA&E FOR FREE CATALOG SHOWING ALL OUR FINE PRODUCTS ST PROSPECT STREET AEROTREND PRODUCTS EAVEN CT 06515 2 $8995 Assembled condition Special tires necessary dirt grass important thing remember about model allow center gravity CG get behind recommended 18 percent wing chord back forward wing spar full-size Gee Bee racers lost 1935 CG limits ignored inexperienced pilot modified aircraft incorporate larger fuel tanks cross-country Bendix race Unfortunately accident blamed design airplane news media feel competent test fly model Gee Bee find good experi enced scale model flier help Believe expert pattern fliers qualified fly airplane Construction I started cutting out fuse lage bulkheads Below top longeron bulkheads made 3/32 sheet balsa 1/64 plywood glued side Temporarily glue X strip wood sides bulkheads top hold being glued top basswood longerons Pin building board carefully align square some other right-angle tool lower half fuselage built upside down board Glue bottom center basswood stringer place clamp pin bulkheads Recheck alignment Glue couple diagonal braces X basswood top bulkhead #A bottom bulkhead #D Now can lay rest medium-hard balsa stringers around fuse lage Fill between stringers 3/32 balsa strips indicated planking Let unit set day two Cut wing ribs out using patterns shown change alrfoil shape thickness racing plane trainer Assemble ribs spars proper order position Cement leading trailing edges place laminate wing tips basswood best results Cut 1/16 sheet balsa leading edge planking trim fit well Cement place sand leading edge proper shape Install aileron hinges torque rods plug-in dowels flying wire fittings landing gear will removable bend shape sewn bolted attachment fasten bulkheads glue ply wood root ribs place Make sure both correct angle want removable landing gear did make up angle brackets aluminum drill gear screw holes Bolt bulkheads bolt root ribs shaped wing-root fairings front bulkhead back made balsa block hollowed out 3/32 balsa planking Cracks low spots filled Maglc Patch similar materiaL Make front contoured section tween 3/16 plywood firewall bulkhead #A out balsa blocks thick sheet stock Hollow out about kness Remove STATEMENT OF OWNERSHIP MANAGEMENT ANO CIRCULATION Pq,dlt 399 SC 1681 1Tttaot PuOIoaton MODEL AVIATION Pobhcaton No 793d 2Date Flng Seotembet 14 1979 3FteooettooOtlssoe Motttflln No 01 Isaac PoEIofled Attnaalo 12 R Annual Sobsonptton Ptce $1600 4 Locatonotlnnossnottceol poblcasonlsteetotvcountostateandZlP codel Pttttetsl baN Ftseenth NI NW Puashttaton DC 2000N N Lopattolt Dl headDarets genetol bosness ol1ces PODISflPt pttttetsl GIN Ffteetth Dl NW WashngtOn DC 2DOON 6 Nattles Potnelete adanesses 01 Puhltsflet Edtpt Manaattg hdtot Pobnshe Cal S Wheeln 6th FIteentflht NWPlaahinglonDC2DSTN PatIo Wllatt 4 Wnte 815 Ftteenth Nt NW WashndtDn DC 20005 Manaona Edto NONE 7 Opane Apadetnto 01 Model Oeonaotcs St N Flteetth Nt asflngtot DC 2OGGN Known Nondholdets tnontaaaees Othet secuttp holdets 0othflg ot hold nul%otttoneottotalantoontotbondsmottgagesot otnelsacottles NONE 9 Fotcotnptetonbononptott otganoatottsaothotoedtomal aIspactal tates lNePsOn 132 122 PDMI outoose lnnpton noonofI 01 ths otganaa tSc enempt stab tot Fedeta noonte tao PuPosps haun hhanaeadutna PtePedtng 12 noontha ID F slant Nato, oIC,ootaton 601001 Aoeaoeno popes no nopnsol sndle do,ngpoElshed ptnpedngneatest l2tnonthstlnodate ATotal No Copes P,nted Net Pesa SonI5467262275 SPaOCtcoatnn 1hal ea thtoooh Oealns Cattets Ntpot Vendots Coontet Dalpa2175 2252 2Mal hohscnpsons4h664h61d6 CTotal Pad C,colaton4913959290 OFteeosttEosonhhMalcattet otOthat Means hampton Contpltnentatoand Othe Fee CoPtes28062212 CTotalDatnEotonlhotnotC&DI5294761610 FCopesNoOst,Noted 1Ott Ce Use Left Ooet Unapononted Opo led alte Pt nI ny1 429653 2Rotons toot howl Agents28612 OTotailNotnot FF1 and2 Ptouldeooa help less ton shownn Al5467262275 11 lpetttothafthasoatomPntsntadehhmPabOoeatpoottePt andoomplete CARLO PInFELCY Puhltahat fuselage structure building board cement contoured section place Place waxed paper top longerons back #D bulkhead pin upper sections bulkheads place Plank top fuse lage back cockpit headrest build adjustable unit indi cated cement stabilizer positive angle degree Leading edge up about 1/16 Build up vertical fin laminated leading edge airplane spent much time its back during asphalt takeoff attempts upper fin strengthened repalred several times Make tail-skid movable rudder control install small tall-wheel expect operate off hard-surface runway scale landing gear shock system works well made per plan Install englne radial mount suit engine Mine tipped 20 degrees right position working engine cylinder between two dummy cylinders scale engine 40-size series 71 K & B engine provides plenty power 115 Zinger prop fuel tank installed directly behind firewall left side fuselage after aileron rudder servos mounted Servos installed directly behind firewall under alongside 8-ounce tank receiver behind bulkhead #A battery pack located will balance aircraft Mine behind receiver extra weight adjustable stabilizer may have farther forward Rubber bands hold battery receiver place plenty foam wrap Lou Proctors streamlined wire #2 turnbuckles used rigging upper rigging wings attaches piece music wire across fuselage longerons Rig degree two wash-out both wings will some flexing torque rods ailerons no amount sloppiness should allowed 1/16 music wire pushrod supported center used elevator control Cables small stiff spring used rudder control Rudder bellcrank length critical link servo should just outside cable attachment point top fuselage hatch held place back internal rubber band front modified Dzues fastener Wheel pants could made hollowed balsa blocks However used two layers fiberglass cloth plywood frames allow pant halves screwed together cowling could made up balsa rings prefer two layers fiberglass cloth aluminum ring about 1/16 X 1/2 glassed back Drill screw holes through attachment stand-off fittings fastened firewall model covered natural Coverite except rudder stabilizer elevators covered Silkspan Several light coats clear Sig dope applied sanded Sig Cub yellow dope sprayed three coats lightly sanded weave cloth should still visible finished except metal covering simulated planking Scalloping numbers masked off sprayed Sig black dope Use 1/16-in wide red striping tape separation black yellow scalloping around numbers small lettering generally black except Springfield Air Racing Association Inc Powered P&W Wasp Hartahorn Steel Tie Rods Supersportster Aircraft Products Wheels & Brakes red Also red edging around Gee Bee rudder N77V Unless good small lettering striping unlikely will come up 108 Model Aviation MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS
Edition: Model Aviation - 1979/12
Page Numbers: 10, 11, 12, 13, 14, 15, 16, 17, 106, 108, 110
NO OCR TEXT NO OCR TEXT THE history aviation has produced few men enough courage gamble convictions Wright Brothers Glenn Curt iss Tony Fokker Clyde Cessna Giuseppe Bel lanca Don Douglas Walt Beech Jack Northrop some Granville Brothers Gee Bees remarkable aircraft con tributed greatly advancement aerody namic engineering Granvilles innovations used other aircraft years Yet news media jumped misfortunes befalling built aircraft blowing mishap completely out proportion actuality expanding news accidents catas trophy contributed downfall Granville Brothers Aircraft Company crashes involving Gee Bee aircraft human fail ure pilot error contributed mech anical failures secondary factor Gee Bees aircraft originally designed flown good airplanes Only modified greater horsepower fuel tankage did get trouble stability problems changes authorized manufac turer Most people under impression Doolittle successfully fly Gee Bee R1 flew time Thompson Trophy race fact R1 racer test-flown number times Russell Boardman before Doolittle saw airplanes Doolittle flew R1 several times before Thompson race qualifying racer dedicated scale man 40powered model exact scale version real City Spring fieldeven aerodynamic set-up Granger Williams Shell event trying establish worlds speed record Other pilots flew Gee Bee racers included Lee Gehlbach Russell Thaw Roy Minor Jimmy Haislip Lee Gehlback test flew R2 flew both Bendix Thompson races first aircraft produced Granvilles 1929 small two place biplane side-byside seating Powered 60-hp Velie M5 engine unusual feature adjustable wing flap could changed flight various angles allowed unusually low landing speed still gave good flying perfor mance factory set up company turned building model Biplanes Early 1930 American Flying Derby organized sponsored American Cirrus Engines Inc planes entered would powered Cirrus engines sold sponsors Cirrus engine four-cylinder in-line manufactured Michigan under English patents Springfield Granvilles made plans enter new plane American Derby An engineer Bob Hail joined Granvilles 1929 rest Granville organization produced first Gee Bee Sportster Model X features airplane carried through rest Gee Bee Sportsters racers through 1934 Bob Hall later turn design talents World War 2 Grumman Aircraft Wing span Model X 25 feetsingle-place opencockpit monoplane powered inverted Cirrus engine developing 95 hp at2 100 rpm wing shape same used suc ceeding Gee Bee designs through 1933 Pilot new creation Lowell Bayles flown everything Jennies Ford trimotors After flying derby impressed performance little sportster bought own use fast safe dependable sport plane Production models Gee Bee X fitted engines Two GeeBees two pilots Right Granger Williams Z article Bill Turner GeeBee Miss Los Angeles especially builtboth now flying Most important factor excellent performance Grangers Z its light weight Its struc ture based closely upon Vein Clements CL planVein specialized GeeBees some 25 years side bottom views basic fuselage show root fairings tailor fuselage including 95hp Cirrus model B 95hp Menasco model C 125-hp Menasco model D 135-hp Ranger Model F Radial engined versions powered 1 10hp Warner model E new two-place Senior Sportater Gee Bee designated model Y larger D model 20% designed 210-hp Kinner 215hp Lycoming 240-hp Wright J6 Pratt & Whitney Wasp Jr 300 hp / outside GeeBee exactly like its big counterpart Lowell Bayles looked inside saw nothing like thisl Servos rud der aileron installed before 8oz tank located under neath side tank immediately behind firewall ciuser view uwe outaims uewne seiu -evident Uoi irue tie rod runs woss cockpit attach points wing wires Front view plan makes clear location fourservos Foamwrapped battery pack appears extreme right photo une psesure truy worth 1000 words Especially interesting treat ment landing gear arrangement functional scale rigging wires Proctor streamlined wire No 2 turnbuckles brace wing take sideloads gear Reaay-so-ve-coverea L evokes special feeling real aircraft K&B 40-sized series 71 tipped 20 degrees position working cyl inder between two dummy cylinders Plenty power Zinger 11-5 TATONE ENGINE MOUNT K 8 B 40 ENGINE AT 400 TILT PLASTIC WASP 9 CYL ENGINE FROM WILLIAMS BROS 3/32 X 3/8 BALSA PLANKING FORMER V16 WIRE TIE ROD ON TOP OF FORMER FORMER B B-i BALSA SHEET COWL RINGS OR FORMED FIBERGLASS 3/16 PLYWOOD FIREWALL BETWEEN LOUVERED CcYAL AND RADIAL ENGINE MOUNT ___7 A74fA CAL ~ GLIOC LOTf k77 7-9 A/C 1/8 BRASS TUBING INSIDE SHOCK SPRING METAL COVER GAP UNDER COWLING REAR RIM FOR AIR COOLING N N N BALSA BLOCKS 3/32 WIRE MAINS IAMS BROS 143 SMOOTH WHEELS 3/32 WIRE MAINMETAL PI\OT FORK STRUTBRACKETTURNBUCKLES ANCHOR 10 1/32 WIRE FIBERGLASS FNrS OR BALSA LAMiNATES 1/8 BALSA FORMS UNDER REMOVABLE HATCH AILERON BELLCRANKS FORMER D 1/16 X 3/16 BALSA FOR ALL STRINGERS FORMER E 3/16 SQ SPRUCE FIN POST 3/32 PLYVJCOD PROCTOR STREAMLINE WIRES / 1/16 SHEET BALSA CORE IN RUDDER AND STABILIZER 1/8 DOWEL TORQUE TUBES 1/32 PLY RUDDER HORNS 1/16 X 1/8 BALSA EDGE LAMINATES N WIRE BRACED STRUT TO SPAR BIKE SPOKE SCREW JACK ON 3/32 PLYWCOD PLATFORM ELEVATOR 8ELLCRANK ---- TAIL SKID WITH WHEEL AT BASE 1/16 PLYWOOD FILLET T E 1/8 X 1/2 BALSA TRAILING EDGES AILERON ROD DISCONNECT AILERON TORQUE WIRE 1/4 BALSA AILERON SPAR METAL CLIP ON SPAR FOR WING RIGGING WIRES 3/16 TRIANGULAR FILLETS 1/16 BALSA ALL WING RIBS I/8X 1/4 SPRUCE SPARS FRONT AND REAR 1/16 BALSA L E COVER TOP AND BOTTOM 1/8 PLYWDD WING TIPS I/16X 3/16 BALSA TIP BOW LAMINATED 1931 Bob Hall Zantford Granville designed new plane first strictly racing model model Z Rolled out shop August 22 1931 Gee Bee Z constructed using some duplicate modified parts used building model Ys Powered loaned Pratt & Whitney Wasp Jr engine used Laird Solution won 1930 Thompson Race basic fuselage structure welded chrome-moly tubing wing built wood using M6 airfoil cockpit cover ancestor bubble canopy transparent section fastened removable section top fuselage cover placed after pilot seated held position quick releas able fasteners inside cockpit Aircraft Product wheels brakes actuated full back position control stick directional brake control rudder pedals first day 1933 National Air Races Bob Hall won 25mile race Menasco-powered D model Zantford Granville fourth 30mile race flying Warnerpowered model E Mary Haislip Menasco powered D Maude Tait Warnerpowered E won second third two womens events Lowell Bayles won Shell qualifying event Z 26734 mph new record Bob Hall second 21386 model Y Rudder belicrank spring-loaded cables running aft rudder pushrod extreme left crank Passing over two pushrods engage horns attached aileron torque tubeplan detail shows uncommonly simple coupling arrangement inner torque tube wings Hubber-scale builders will appreciate photo looking aft stringers permit almost shell-like structure weight impor tant can no business basic boxes other popular crudi ties Note bushed pushrod guide also provides stiffening way wasand clearly dont have take word Tile shock strut covers thin aluminum Front view plan shows cross sections both built-up balsa boots Pants can hollowed balsa blocks Granger made two halves using plywood frames two layers glass clothhalves screw together Gear can permanently fixed detachabledetails text help detailed photo plans can duplicate actual strut arrangement real aircraftnote shock-absorbing coil spring Jr cylinders configured just two rings very simple arrangement designer advises loca tion center gravity must behind 18% wing chord FULL SIZE PLANS AVAILABLE SEE PAGE 128 Bayles won 50mile race Z Bob Hall second placeuntil hit water tower forced land two feet wing tip gone model Y Bob Hall won General Tire Trophy Z won mixed free-for-all race also Z Maude Tait won Aerol Trophy Y Lowell Bayles won Thompson Trophy race 23623 mph Z Bob Hall fourth Y too bad first year Gee Bee racing group November 1931 750-hp Pratt & Whit ney Wasp Sr engine installed Gee Bee Z attempt set new speed record Several tries made during November early December set record propeller engine problems kept completing required four passes over course December 5 Bayles flew Z about 1000 feet five miles course went dive gain speed As levelled out roared through course first pass airplane suddenly dipped level flight pulled up sharply right wing folded up Z rolled twice right before crashed exploded physical evidence scene motion pictures crash inspected frame frame leading conclusion loose gas cap started trouble Apparently cap flew off striking cockpit cover canopy shattered inward blinding Bayles causing him lose control Designer Bob Hall said Gee Bee sensitive longitudinally added stress dip pull-up caused right wing fall Speed time estimated excess 325 mph first unfortunate series mishaps exploited news papers hack writers seeking capitalize sensationalism Much information adapted book Gee Bee Story Charles Man drake additional information correc tions Bob Granville Building Model Gee Bee i tired same old quickly-built easy-flying muchmodified scale models never look like original airplaneyou ready take chal lenge exact scale model unusual airplane choose Gee Bee racer because intrigues everyone experts tells wont fly serious enough make exact scale say welcome exclusive group model builders fliers other hand people think scale models will fly unless redesign bigger tails dif ferent airfoils shorter landing gear some other abortive change because know original designer forget buddy talk same language afraid challenge exact scale model presents lousy pilot model Gee Bee Z exact scale proportions aerodynamic layout flying stability equal good high per fonnance model has flown will Continued page 106 ltttj1 . - - -t I .. j 77 j I -t I/ /\ Vh vrr1v II -~1 -A -~2 Painstaking attention engine c pro duced life-like P&W Particularly note Tamitiar trademark location case shaft well pushrod attachment case Plans show balsa ring cowl construction Granger used two-layer fiberglass shell aluminum ring back Granger Z recommends wheel land ings warns against 3-pointers Describes mod ification tires enabled ship take off concrete runways problem begin ning comments proper handling during roll-out after touchdown GeeBee lore fly Fast Combat now am wonder ing could pass along either Mr Hempel Mr Upton someone has experience jets What primarily need know current designs Jet Speed planes could get plans Also recommended Dyna Jet Raven Assuming arent kept secret what some reworking processes done jets make faster other cutting off air nozzle enlarging holes flowiector Dyna Jet Does Curtiss Dyna still make Dyna Jet Any information may able supply will greatly appreci ated Thank very much Cam Dix Ontario Canada have put Mr Dix touch Mike Langlois did wizard article CL Super Burp December 1978 issue MA publishes occasional state-of-the-art articles ob scure types models competition just such purposesto get data down somewhere long-lasting refer ences now possible bellowing sounds wafting across Cam s ho metown Don Mills entire pro vince Ontario yes under stand Curtiss still has Dyna Jets Al discount advertisers has offered item recently Likes Half-A Scale Just few lines let know think choice construction pro jects excellent particularly im pressed Wildcat Bowers SruH have around B-25 March issue would like encourage publish addi tional Frank Baker multisthat A-26 looks very interesting I C Sloane East Hanover NJ Alas JC dont weve got works Hurst cooking up Lockheed Air Express Gee Bee Z/Williams continued page 17 fly itself has no bad habits Landings best made wheel landings try three-point Quick rudder action roll-out necessary avoid ground ioops asphalt other hard surface tail-wheel comes contact small tail-wheel built end tailskid use hard-surfaced runways unable fly airplane off asphalt concrete until some special tires made grinding groove regular tires snapping 0 ring made polypropelene done allowing tires slide no takeoff problems experienced Full backstick required keep tail down push throttle open ease stick forward speed increases ship comes off little back stick 30 50 feet depending upon wind 106 Model Aviation Please send _______________ copies new 5th edition Radio Control Buyers Guide Enclosed $825 copy ordered $725 retail plus $100 postage handling City State ZIP _________________________________________ Return RC Buyers Guide Clifton House Clifton VA 22024 LOOKING FOR A BETTER FIELD BOX VIM RflY Look Aerotrend best market Tested approved reccomended RCM FM MAN magazines Flyin Box right made super durable fiberglas shipped completely assembled stor age bins flip-up plane supports folding legs wood boxesleft offer similar range features low low price Both types offered deluxe models built-In power panels other access ories SEND SA&E FOR FREE CATALOG SHOWING ALL OUR FINE PRODUCTS ST PROSPECT STREET AEROTREND PRODUCTS EAVEN CT 06515 2 $8995 Assembled condition Special tires necessary dirt grass important thing remember about model allow center gravity CG get behind recommended 18 percent wing chord back forward wing spar full-size Gee Bee racers lost 1935 CG limits ignored inexperienced pilot modified aircraft incorporate larger fuel tanks cross-country Bendix race Unfortunately accident blamed design airplane news media feel competent test fly model Gee Bee find good experi enced scale model flier help Believe expert pattern fliers qualified fly airplane Construction I started cutting out fuse lage bulkheads Below top longeron bulkheads made 3/32 sheet balsa 1/64 plywood glued side Temporarily glue X strip wood sides bulkheads top hold being glued top basswood longerons Pin building board carefully align square some other right-angle tool lower half fuselage built upside down board Glue bottom center basswood stringer place clamp pin bulkheads Recheck alignment Glue couple diagonal braces X basswood top bulkhead #A bottom bulkhead #D Now can lay rest medium-hard balsa stringers around fuse lage Fill between stringers 3/32 balsa strips indicated planking Let unit set day two Cut wing ribs out using patterns shown change alrfoil shape thickness racing plane trainer Assemble ribs spars proper order position Cement leading trailing edges place laminate wing tips basswood best results Cut 1/16 sheet balsa leading edge planking trim fit well Cement place sand leading edge proper shape Install aileron hinges torque rods plug-in dowels flying wire fittings landing gear will removable bend shape sewn bolted attachment fasten bulkheads glue ply wood root ribs place Make sure both correct angle want removable landing gear did make up angle brackets aluminum drill gear screw holes Bolt bulkheads bolt root ribs shaped wing-root fairings front bulkhead back made balsa block hollowed out 3/32 balsa planking Cracks low spots filled Maglc Patch similar materiaL Make front contoured section tween 3/16 plywood firewall bulkhead #A out balsa blocks thick sheet stock Hollow out about kness Remove STATEMENT OF OWNERSHIP MANAGEMENT ANO CIRCULATION Pq,dlt 399 SC 1681 1Tttaot PuOIoaton MODEL AVIATION Pobhcaton No 793d 2Date Flng Seotembet 14 1979 3FteooettooOtlssoe Motttflln No 01 Isaac PoEIofled Attnaalo 12 R Annual Sobsonptton Ptce $1600 4 Locatonotlnnossnottceol poblcasonlsteetotvcountostateandZlP codel Pttttetsl baN Ftseenth NI NW Puashttaton DC 2000N N Lopattolt Dl headDarets genetol bosness ol1ces PODISflPt pttttetsl GIN Ffteetth Dl NW WashngtOn DC 2DOON 6 Nattles Potnelete adanesses 01 Puhltsflet Edtpt Manaattg hdtot Pobnshe Cal S Wheeln 6th FIteentflht NWPlaahinglonDC2DSTN PatIo Wllatt 4 Wnte 815 Ftteenth Nt NW WashndtDn DC 20005 Manaona Edto NONE 7 Opane Apadetnto 01 Model Oeonaotcs St N Flteetth Nt asflngtot DC 2OGGN Known Nondholdets tnontaaaees Othet secuttp holdets 0othflg ot hold nul%otttoneottotalantoontotbondsmottgagesot otnelsacottles NONE 9 Fotcotnptetonbononptott otganoatottsaothotoedtomal aIspactal tates lNePsOn 132 122 PDMI outoose lnnpton noonofI 01 ths otganaa tSc enempt stab tot Fedeta noonte tao PuPosps haun hhanaeadutna PtePedtng 12 noontha ID F slant Nato, oIC,ootaton 601001 Aoeaoeno popes no nopnsol sndle do,ngpoElshed ptnpedngneatest l2tnonthstlnodate ATotal No Copes P,nted Net Pesa SonI5467262275 SPaOCtcoatnn 1hal ea thtoooh Oealns Cattets Ntpot Vendots Coontet Dalpa2175 2252 2Mal hohscnpsons4h664h61d6 CTotal Pad C,colaton4913959290 OFteeosttEosonhhMalcattet otOthat Means hampton Contpltnentatoand Othe Fee CoPtes28062212 CTotalDatnEotonlhotnotC&DI5294761610 FCopesNoOst,Noted 1Ott Ce Use Left Ooet Unapononted Opo led alte Pt nI ny1 429653 2Rotons toot howl Agents28612 OTotailNotnot FF1 and2 Ptouldeooa help less ton shownn Al5467262275 11 lpetttothafthasoatomPntsntadehhmPabOoeatpoottePt andoomplete CARLO PInFELCY Puhltahat fuselage structure building board cement contoured section place Place waxed paper top longerons back #D bulkhead pin upper sections bulkheads place Plank top fuse lage back cockpit headrest build adjustable unit indi cated cement stabilizer positive angle degree Leading edge up about 1/16 Build up vertical fin laminated leading edge airplane spent much time its back during asphalt takeoff attempts upper fin strengthened repalred several times Make tail-skid movable rudder control install small tall-wheel expect operate off hard-surface runway scale landing gear shock system works well made per plan Install englne radial mount suit engine Mine tipped 20 degrees right position working engine cylinder between two dummy cylinders scale engine 40-size series 71 K & B engine provides plenty power 115 Zinger prop fuel tank installed directly behind firewall left side fuselage after aileron rudder servos mounted Servos installed directly behind firewall under alongside 8-ounce tank receiver behind bulkhead #A battery pack located will balance aircraft Mine behind receiver extra weight adjustable stabilizer may have farther forward Rubber bands hold battery receiver place plenty foam wrap Lou Proctors streamlined wire #2 turnbuckles used rigging upper rigging wings attaches piece music wire across fuselage longerons Rig degree two wash-out both wings will some flexing torque rods ailerons no amount sloppiness should allowed 1/16 music wire pushrod supported center used elevator control Cables small stiff spring used rudder control Rudder bellcrank length critical link servo should just outside cable attachment point top fuselage hatch held place back internal rubber band front modified Dzues fastener Wheel pants could made hollowed balsa blocks However used two layers fiberglass cloth plywood frames allow pant halves screwed together cowling could made up balsa rings prefer two layers fiberglass cloth aluminum ring about 1/16 X 1/2 glassed back Drill screw holes through attachment stand-off fittings fastened firewall model covered natural Coverite except rudder stabilizer elevators covered Silkspan Several light coats clear Sig dope applied sanded Sig Cub yellow dope sprayed three coats lightly sanded weave cloth should still visible finished except metal covering simulated planking Scalloping numbers masked off sprayed Sig black dope Use 1/16-in wide red striping tape separation black yellow scalloping around numbers small lettering generally black except Springfield Air Racing Association Inc Powered P&W Wasp Hartahorn Steel Tie Rods Supersportster Aircraft Products Wheels & Brakes red Also red edging around Gee Bee rudder N77V Unless good small lettering striping unlikely will come up 108 Model Aviation MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS
Edition: Model Aviation - 1979/12
Page Numbers: 10, 11, 12, 13, 14, 15, 16, 17, 106, 108, 110
NO OCR TEXT NO OCR TEXT THE history aviation has produced few men enough courage gamble convictions Wright Brothers Glenn Curt iss Tony Fokker Clyde Cessna Giuseppe Bel lanca Don Douglas Walt Beech Jack Northrop some Granville Brothers Gee Bees remarkable aircraft con tributed greatly advancement aerody namic engineering Granvilles innovations used other aircraft years Yet news media jumped misfortunes befalling built aircraft blowing mishap completely out proportion actuality expanding news accidents catas trophy contributed downfall Granville Brothers Aircraft Company crashes involving Gee Bee aircraft human fail ure pilot error contributed mech anical failures secondary factor Gee Bees aircraft originally designed flown good airplanes Only modified greater horsepower fuel tankage did get trouble stability problems changes authorized manufac turer Most people under impression Doolittle successfully fly Gee Bee R1 flew time Thompson Trophy race fact R1 racer test-flown number times Russell Boardman before Doolittle saw airplanes Doolittle flew R1 several times before Thompson race qualifying racer dedicated scale man 40powered model exact scale version real City Spring fieldeven aerodynamic set-up Granger Williams Shell event trying establish worlds speed record Other pilots flew Gee Bee racers included Lee Gehlbach Russell Thaw Roy Minor Jimmy Haislip Lee Gehlback test flew R2 flew both Bendix Thompson races first aircraft produced Granvilles 1929 small two place biplane side-byside seating Powered 60-hp Velie M5 engine unusual feature adjustable wing flap could changed flight various angles allowed unusually low landing speed still gave good flying perfor mance factory set up company turned building model Biplanes Early 1930 American Flying Derby organized sponsored American Cirrus Engines Inc planes entered would powered Cirrus engines sold sponsors Cirrus engine four-cylinder in-line manufactured Michigan under English patents Springfield Granvilles made plans enter new plane American Derby An engineer Bob Hail joined Granvilles 1929 rest Granville organization produced first Gee Bee Sportster Model X features airplane carried through rest Gee Bee Sportsters racers through 1934 Bob Hall later turn design talents World War 2 Grumman Aircraft Wing span Model X 25 feetsingle-place opencockpit monoplane powered inverted Cirrus engine developing 95 hp at2 100 rpm wing shape same used suc ceeding Gee Bee designs through 1933 Pilot new creation Lowell Bayles flown everything Jennies Ford trimotors After flying derby impressed performance little sportster bought own use fast safe dependable sport plane Production models Gee Bee X fitted engines Two GeeBees two pilots Right Granger Williams Z article Bill Turner GeeBee Miss Los Angeles especially builtboth now flying Most important factor excellent performance Grangers Z its light weight Its struc ture based closely upon Vein Clements CL planVein specialized GeeBees some 25 years side bottom views basic fuselage show root fairings tailor fuselage including 95hp Cirrus model B 95hp Menasco model C 125-hp Menasco model D 135-hp Ranger Model F Radial engined versions powered 1 10hp Warner model E new two-place Senior Sportater Gee Bee designated model Y larger D model 20% designed 210-hp Kinner 215hp Lycoming 240-hp Wright J6 Pratt & Whitney Wasp Jr 300 hp / outside GeeBee exactly like its big counterpart Lowell Bayles looked inside saw nothing like thisl Servos rud der aileron installed before 8oz tank located under neath side tank immediately behind firewall ciuser view uwe outaims uewne seiu -evident Uoi irue tie rod runs woss cockpit attach points wing wires Front view plan makes clear location fourservos Foamwrapped battery pack appears extreme right photo une psesure truy worth 1000 words Especially interesting treat ment landing gear arrangement functional scale rigging wires Proctor streamlined wire No 2 turnbuckles brace wing take sideloads gear Reaay-so-ve-coverea L evokes special feeling real aircraft K&B 40-sized series 71 tipped 20 degrees position working cyl inder between two dummy cylinders Plenty power Zinger 11-5 TATONE ENGINE MOUNT K 8 B 40 ENGINE AT 400 TILT PLASTIC WASP 9 CYL ENGINE FROM WILLIAMS BROS 3/32 X 3/8 BALSA PLANKING FORMER V16 WIRE TIE ROD ON TOP OF FORMER FORMER B B-i BALSA SHEET COWL RINGS OR FORMED FIBERGLASS 3/16 PLYWOOD FIREWALL BETWEEN LOUVERED CcYAL AND RADIAL ENGINE MOUNT ___7 A74fA CAL ~ GLIOC LOTf k77 7-9 A/C 1/8 BRASS TUBING INSIDE SHOCK SPRING METAL COVER GAP UNDER COWLING REAR RIM FOR AIR COOLING N N N BALSA BLOCKS 3/32 WIRE MAINS IAMS BROS 143 SMOOTH WHEELS 3/32 WIRE MAINMETAL PI\OT FORK STRUTBRACKETTURNBUCKLES ANCHOR 10 1/32 WIRE FIBERGLASS FNrS OR BALSA LAMiNATES 1/8 BALSA FORMS UNDER REMOVABLE HATCH AILERON BELLCRANKS FORMER D 1/16 X 3/16 BALSA FOR ALL STRINGERS FORMER E 3/16 SQ SPRUCE FIN POST 3/32 PLYVJCOD PROCTOR STREAMLINE WIRES / 1/16 SHEET BALSA CORE IN RUDDER AND STABILIZER 1/8 DOWEL TORQUE TUBES 1/32 PLY RUDDER HORNS 1/16 X 1/8 BALSA EDGE LAMINATES N WIRE BRACED STRUT TO SPAR BIKE SPOKE SCREW JACK ON 3/32 PLYWCOD PLATFORM ELEVATOR 8ELLCRANK ---- TAIL SKID WITH WHEEL AT BASE 1/16 PLYWOOD FILLET T E 1/8 X 1/2 BALSA TRAILING EDGES AILERON ROD DISCONNECT AILERON TORQUE WIRE 1/4 BALSA AILERON SPAR METAL CLIP ON SPAR FOR WING RIGGING WIRES 3/16 TRIANGULAR FILLETS 1/16 BALSA ALL WING RIBS I/8X 1/4 SPRUCE SPARS FRONT AND REAR 1/16 BALSA L E COVER TOP AND BOTTOM 1/8 PLYWDD WING TIPS I/16X 3/16 BALSA TIP BOW LAMINATED 1931 Bob Hall Zantford Granville designed new plane first strictly racing model model Z Rolled out shop August 22 1931 Gee Bee Z constructed using some duplicate modified parts used building model Ys Powered loaned Pratt & Whitney Wasp Jr engine used Laird Solution won 1930 Thompson Race basic fuselage structure welded chrome-moly tubing wing built wood using M6 airfoil cockpit cover ancestor bubble canopy transparent section fastened removable section top fuselage cover placed after pilot seated held position quick releas able fasteners inside cockpit Aircraft Product wheels brakes actuated full back position control stick directional brake control rudder pedals first day 1933 National Air Races Bob Hall won 25mile race Menasco-powered D model Zantford Granville fourth 30mile race flying Warnerpowered model E Mary Haislip Menasco powered D Maude Tait Warnerpowered E won second third two womens events Lowell Bayles won Shell qualifying event Z 26734 mph new record Bob Hall second 21386 model Y Rudder belicrank spring-loaded cables running aft rudder pushrod extreme left crank Passing over two pushrods engage horns attached aileron torque tubeplan detail shows uncommonly simple coupling arrangement inner torque tube wings Hubber-scale builders will appreciate photo looking aft stringers permit almost shell-like structure weight impor tant can no business basic boxes other popular crudi ties Note bushed pushrod guide also provides stiffening way wasand clearly dont have take word Tile shock strut covers thin aluminum Front view plan shows cross sections both built-up balsa boots Pants can hollowed balsa blocks Granger made two halves using plywood frames two layers glass clothhalves screw together Gear can permanently fixed detachabledetails text help detailed photo plans can duplicate actual strut arrangement real aircraftnote shock-absorbing coil spring Jr cylinders configured just two rings very simple arrangement designer advises loca tion center gravity must behind 18% wing chord FULL SIZE PLANS AVAILABLE SEE PAGE 128 Bayles won 50mile race Z Bob Hall second placeuntil hit water tower forced land two feet wing tip gone model Y Bob Hall won General Tire Trophy Z won mixed free-for-all race also Z Maude Tait won Aerol Trophy Y Lowell Bayles won Thompson Trophy race 23623 mph Z Bob Hall fourth Y too bad first year Gee Bee racing group November 1931 750-hp Pratt & Whit ney Wasp Sr engine installed Gee Bee Z attempt set new speed record Several tries made during November early December set record propeller engine problems kept completing required four passes over course December 5 Bayles flew Z about 1000 feet five miles course went dive gain speed As levelled out roared through course first pass airplane suddenly dipped level flight pulled up sharply right wing folded up Z rolled twice right before crashed exploded physical evidence scene motion pictures crash inspected frame frame leading conclusion loose gas cap started trouble Apparently cap flew off striking cockpit cover canopy shattered inward blinding Bayles causing him lose control Designer Bob Hall said Gee Bee sensitive longitudinally added stress dip pull-up caused right wing fall Speed time estimated excess 325 mph first unfortunate series mishaps exploited news papers hack writers seeking capitalize sensationalism Much information adapted book Gee Bee Story Charles Man drake additional information correc tions Bob Granville Building Model Gee Bee i tired same old quickly-built easy-flying muchmodified scale models never look like original airplaneyou ready take chal lenge exact scale model unusual airplane choose Gee Bee racer because intrigues everyone experts tells wont fly serious enough make exact scale say welcome exclusive group model builders fliers other hand people think scale models will fly unless redesign bigger tails dif ferent airfoils shorter landing gear some other abortive change because know original designer forget buddy talk same language afraid challenge exact scale model presents lousy pilot model Gee Bee Z exact scale proportions aerodynamic layout flying stability equal good high per fonnance model has flown will Continued page 106 ltttj1 . - - -t I .. j 77 j I -t I/ /\ Vh vrr1v II -~1 -A -~2 Painstaking attention engine c pro duced life-like P&W Particularly note Tamitiar trademark location case shaft well pushrod attachment case Plans show balsa ring cowl construction Granger used two-layer fiberglass shell aluminum ring back Granger Z recommends wheel land ings warns against 3-pointers Describes mod ification tires enabled ship take off concrete runways problem begin ning comments proper handling during roll-out after touchdown GeeBee lore fly Fast Combat now am wonder ing could pass along either Mr Hempel Mr Upton someone has experience jets What primarily need know current designs Jet Speed planes could get plans Also recommended Dyna Jet Raven Assuming arent kept secret what some reworking processes done jets make faster other cutting off air nozzle enlarging holes flowiector Dyna Jet Does Curtiss Dyna still make Dyna Jet Any information may able supply will greatly appreci ated Thank very much Cam Dix Ontario Canada have put Mr Dix touch Mike Langlois did wizard article CL Super Burp December 1978 issue MA publishes occasional state-of-the-art articles ob scure types models competition just such purposesto get data down somewhere long-lasting refer ences now possible bellowing sounds wafting across Cam s ho metown Don Mills entire pro vince Ontario yes under stand Curtiss still has Dyna Jets Al discount advertisers has offered item recently Likes Half-A Scale Just few lines let know think choice construction pro jects excellent particularly im pressed Wildcat Bowers SruH have around B-25 March issue would like encourage publish addi tional Frank Baker multisthat A-26 looks very interesting I C Sloane East Hanover NJ Alas JC dont weve got works Hurst cooking up Lockheed Air Express Gee Bee Z/Williams continued page 17 fly itself has no bad habits Landings best made wheel landings try three-point Quick rudder action roll-out necessary avoid ground ioops asphalt other hard surface tail-wheel comes contact small tail-wheel built end tailskid use hard-surfaced runways unable fly airplane off asphalt concrete until some special tires made grinding groove regular tires snapping 0 ring made polypropelene done allowing tires slide no takeoff problems experienced Full backstick required keep tail down push throttle open ease stick forward speed increases ship comes off little back stick 30 50 feet depending upon wind 106 Model Aviation Please send _______________ copies new 5th edition Radio Control Buyers Guide Enclosed $825 copy ordered $725 retail plus $100 postage handling City State ZIP _________________________________________ Return RC Buyers Guide Clifton House Clifton VA 22024 LOOKING FOR A BETTER FIELD BOX VIM RflY Look Aerotrend best market Tested approved reccomended RCM FM MAN magazines Flyin Box right made super durable fiberglas shipped completely assembled stor age bins flip-up plane supports folding legs wood boxesleft offer similar range features low low price Both types offered deluxe models built-In power panels other access ories SEND SA&E FOR FREE CATALOG SHOWING ALL OUR FINE PRODUCTS ST PROSPECT STREET AEROTREND PRODUCTS EAVEN CT 06515 2 $8995 Assembled condition Special tires necessary dirt grass important thing remember about model allow center gravity CG get behind recommended 18 percent wing chord back forward wing spar full-size Gee Bee racers lost 1935 CG limits ignored inexperienced pilot modified aircraft incorporate larger fuel tanks cross-country Bendix race Unfortunately accident blamed design airplane news media feel competent test fly model Gee Bee find good experi enced scale model flier help Believe expert pattern fliers qualified fly airplane Construction I started cutting out fuse lage bulkheads Below top longeron bulkheads made 3/32 sheet balsa 1/64 plywood glued side Temporarily glue X strip wood sides bulkheads top hold being glued top basswood longerons Pin building board carefully align square some other right-angle tool lower half fuselage built upside down board Glue bottom center basswood stringer place clamp pin bulkheads Recheck alignment Glue couple diagonal braces X basswood top bulkhead #A bottom bulkhead #D Now can lay rest medium-hard balsa stringers around fuse lage Fill between stringers 3/32 balsa strips indicated planking Let unit set day two Cut wing ribs out using patterns shown change alrfoil shape thickness racing plane trainer Assemble ribs spars proper order position Cement leading trailing edges place laminate wing tips basswood best results Cut 1/16 sheet balsa leading edge planking trim fit well Cement place sand leading edge proper shape Install aileron hinges torque rods plug-in dowels flying wire fittings landing gear will removable bend shape sewn bolted attachment fasten bulkheads glue ply wood root ribs place Make sure both correct angle want removable landing gear did make up angle brackets aluminum drill gear screw holes Bolt bulkheads bolt root ribs shaped wing-root fairings front bulkhead back made balsa block hollowed out 3/32 balsa planking Cracks low spots filled Maglc Patch similar materiaL Make front contoured section tween 3/16 plywood firewall bulkhead #A out balsa blocks thick sheet stock Hollow out about kness Remove STATEMENT OF OWNERSHIP MANAGEMENT ANO CIRCULATION Pq,dlt 399 SC 1681 1Tttaot PuOIoaton MODEL AVIATION Pobhcaton No 793d 2Date Flng Seotembet 14 1979 3FteooettooOtlssoe Motttflln No 01 Isaac PoEIofled Attnaalo 12 R Annual Sobsonptton Ptce $1600 4 Locatonotlnnossnottceol poblcasonlsteetotvcountostateandZlP codel Pttttetsl baN Ftseenth NI NW Puashttaton DC 2000N N Lopattolt Dl headDarets genetol bosness ol1ces PODISflPt pttttetsl GIN Ffteetth Dl NW WashngtOn DC 2DOON 6 Nattles Potnelete adanesses 01 Puhltsflet Edtpt Manaattg hdtot Pobnshe Cal S Wheeln 6th FIteentflht NWPlaahinglonDC2DSTN PatIo Wllatt 4 Wnte 815 Ftteenth Nt NW WashndtDn DC 20005 Manaona Edto NONE 7 Opane Apadetnto 01 Model Oeonaotcs St N Flteetth Nt asflngtot DC 2OGGN Known Nondholdets tnontaaaees Othet secuttp holdets 0othflg ot hold nul%otttoneottotalantoontotbondsmottgagesot otnelsacottles NONE 9 Fotcotnptetonbononptott otganoatottsaothotoedtomal aIspactal tates lNePsOn 132 122 PDMI outoose lnnpton noonofI 01 ths otganaa tSc enempt stab tot Fedeta noonte tao PuPosps haun hhanaeadutna PtePedtng 12 noontha ID F slant Nato, oIC,ootaton 601001 Aoeaoeno popes no nopnsol sndle do,ngpoElshed ptnpedngneatest l2tnonthstlnodate ATotal No Copes P,nted Net Pesa SonI5467262275 SPaOCtcoatnn 1hal ea thtoooh Oealns Cattets Ntpot Vendots Coontet Dalpa2175 2252 2Mal hohscnpsons4h664h61d6 CTotal Pad C,colaton4913959290 OFteeosttEosonhhMalcattet otOthat Means hampton Contpltnentatoand Othe Fee CoPtes28062212 CTotalDatnEotonlhotnotC&DI5294761610 FCopesNoOst,Noted 1Ott Ce Use Left Ooet Unapononted Opo led alte Pt nI ny1 429653 2Rotons toot howl Agents28612 OTotailNotnot FF1 and2 Ptouldeooa help less ton shownn Al5467262275 11 lpetttothafthasoatomPntsntadehhmPabOoeatpoottePt andoomplete CARLO PInFELCY Puhltahat fuselage structure building board cement contoured section place Place waxed paper top longerons back #D bulkhead pin upper sections bulkheads place Plank top fuse lage back cockpit headrest build adjustable unit indi cated cement stabilizer positive angle degree Leading edge up about 1/16 Build up vertical fin laminated leading edge airplane spent much time its back during asphalt takeoff attempts upper fin strengthened repalred several times Make tail-skid movable rudder control install small tall-wheel expect operate off hard-surface runway scale landing gear shock system works well made per plan Install englne radial mount suit engine Mine tipped 20 degrees right position working engine cylinder between two dummy cylinders scale engine 40-size series 71 K & B engine provides plenty power 115 Zinger prop fuel tank installed directly behind firewall left side fuselage after aileron rudder servos mounted Servos installed directly behind firewall under alongside 8-ounce tank receiver behind bulkhead #A battery pack located will balance aircraft Mine behind receiver extra weight adjustable stabilizer may have farther forward Rubber bands hold battery receiver place plenty foam wrap Lou Proctors streamlined wire #2 turnbuckles used rigging upper rigging wings attaches piece music wire across fuselage longerons Rig degree two wash-out both wings will some flexing torque rods ailerons no amount sloppiness should allowed 1/16 music wire pushrod supported center used elevator control Cables small stiff spring used rudder control Rudder bellcrank length critical link servo should just outside cable attachment point top fuselage hatch held place back internal rubber band front modified Dzues fastener Wheel pants could made hollowed balsa blocks However used two layers fiberglass cloth plywood frames allow pant halves screwed together cowling could made up balsa rings prefer two layers fiberglass cloth aluminum ring about 1/16 X 1/2 glassed back Drill screw holes through attachment stand-off fittings fastened firewall model covered natural Coverite except rudder stabilizer elevators covered Silkspan Several light coats clear Sig dope applied sanded Sig Cub yellow dope sprayed three coats lightly sanded weave cloth should still visible finished except metal covering simulated planking Scalloping numbers masked off sprayed Sig black dope Use 1/16-in wide red striping tape separation black yellow scalloping around numbers small lettering generally black except Springfield Air Racing Association Inc Powered P&W Wasp Hartahorn Steel Tie Rods Supersportster Aircraft Products Wheels & Brakes red Also red edging around Gee Bee rudder N77V Unless good small lettering striping unlikely will come up 108 Model Aviation MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS
Edition: Model Aviation - 1979/12
Page Numbers: 10, 11, 12, 13, 14, 15, 16, 17, 106, 108, 110
NO OCR TEXT NO OCR TEXT THE history aviation has produced few men enough courage gamble convictions Wright Brothers Glenn Curt iss Tony Fokker Clyde Cessna Giuseppe Bel lanca Don Douglas Walt Beech Jack Northrop some Granville Brothers Gee Bees remarkable aircraft con tributed greatly advancement aerody namic engineering Granvilles innovations used other aircraft years Yet news media jumped misfortunes befalling built aircraft blowing mishap completely out proportion actuality expanding news accidents catas trophy contributed downfall Granville Brothers Aircraft Company crashes involving Gee Bee aircraft human fail ure pilot error contributed mech anical failures secondary factor Gee Bees aircraft originally designed flown good airplanes Only modified greater horsepower fuel tankage did get trouble stability problems changes authorized manufac turer Most people under impression Doolittle successfully fly Gee Bee R1 flew time Thompson Trophy race fact R1 racer test-flown number times Russell Boardman before Doolittle saw airplanes Doolittle flew R1 several times before Thompson race qualifying racer dedicated scale man 40powered model exact scale version real City Spring fieldeven aerodynamic set-up Granger Williams Shell event trying establish worlds speed record Other pilots flew Gee Bee racers included Lee Gehlbach Russell Thaw Roy Minor Jimmy Haislip Lee Gehlback test flew R2 flew both Bendix Thompson races first aircraft produced Granvilles 1929 small two place biplane side-byside seating Powered 60-hp Velie M5 engine unusual feature adjustable wing flap could changed flight various angles allowed unusually low landing speed still gave good flying perfor mance factory set up company turned building model Biplanes Early 1930 American Flying Derby organized sponsored American Cirrus Engines Inc planes entered would powered Cirrus engines sold sponsors Cirrus engine four-cylinder in-line manufactured Michigan under English patents Springfield Granvilles made plans enter new plane American Derby An engineer Bob Hail joined Granvilles 1929 rest Granville organization produced first Gee Bee Sportster Model X features airplane carried through rest Gee Bee Sportsters racers through 1934 Bob Hall later turn design talents World War 2 Grumman Aircraft Wing span Model X 25 feetsingle-place opencockpit monoplane powered inverted Cirrus engine developing 95 hp at2 100 rpm wing shape same used suc ceeding Gee Bee designs through 1933 Pilot new creation Lowell Bayles flown everything Jennies Ford trimotors After flying derby impressed performance little sportster bought own use fast safe dependable sport plane Production models Gee Bee X fitted engines Two GeeBees two pilots Right Granger Williams Z article Bill Turner GeeBee Miss Los Angeles especially builtboth now flying Most important factor excellent performance Grangers Z its light weight Its struc ture based closely upon Vein Clements CL planVein specialized GeeBees some 25 years side bottom views basic fuselage show root fairings tailor fuselage including 95hp Cirrus model B 95hp Menasco model C 125-hp Menasco model D 135-hp Ranger Model F Radial engined versions powered 1 10hp Warner model E new two-place Senior Sportater Gee Bee designated model Y larger D model 20% designed 210-hp Kinner 215hp Lycoming 240-hp Wright J6 Pratt & Whitney Wasp Jr 300 hp / outside GeeBee exactly like its big counterpart Lowell Bayles looked inside saw nothing like thisl Servos rud der aileron installed before 8oz tank located under neath side tank immediately behind firewall ciuser view uwe outaims uewne seiu -evident Uoi irue tie rod runs woss cockpit attach points wing wires Front view plan makes clear location fourservos Foamwrapped battery pack appears extreme right photo une psesure truy worth 1000 words Especially interesting treat ment landing gear arrangement functional scale rigging wires Proctor streamlined wire No 2 turnbuckles brace wing take sideloads gear Reaay-so-ve-coverea L evokes special feeling real aircraft K&B 40-sized series 71 tipped 20 degrees position working cyl inder between two dummy cylinders Plenty power Zinger 11-5 TATONE ENGINE MOUNT K 8 B 40 ENGINE AT 400 TILT PLASTIC WASP 9 CYL ENGINE FROM WILLIAMS BROS 3/32 X 3/8 BALSA PLANKING FORMER V16 WIRE TIE ROD ON TOP OF FORMER FORMER B B-i BALSA SHEET COWL RINGS OR FORMED FIBERGLASS 3/16 PLYWOOD FIREWALL BETWEEN LOUVERED CcYAL AND RADIAL ENGINE MOUNT ___7 A74fA CAL ~ GLIOC LOTf k77 7-9 A/C 1/8 BRASS TUBING INSIDE SHOCK SPRING METAL COVER GAP UNDER COWLING REAR RIM FOR AIR COOLING N N N BALSA BLOCKS 3/32 WIRE MAINS IAMS BROS 143 SMOOTH WHEELS 3/32 WIRE MAINMETAL PI\OT FORK STRUTBRACKETTURNBUCKLES ANCHOR 10 1/32 WIRE FIBERGLASS FNrS OR BALSA LAMiNATES 1/8 BALSA FORMS UNDER REMOVABLE HATCH AILERON BELLCRANKS FORMER D 1/16 X 3/16 BALSA FOR ALL STRINGERS FORMER E 3/16 SQ SPRUCE FIN POST 3/32 PLYVJCOD PROCTOR STREAMLINE WIRES / 1/16 SHEET BALSA CORE IN RUDDER AND STABILIZER 1/8 DOWEL TORQUE TUBES 1/32 PLY RUDDER HORNS 1/16 X 1/8 BALSA EDGE LAMINATES N WIRE BRACED STRUT TO SPAR BIKE SPOKE SCREW JACK ON 3/32 PLYWCOD PLATFORM ELEVATOR 8ELLCRANK ---- TAIL SKID WITH WHEEL AT BASE 1/16 PLYWOOD FILLET T E 1/8 X 1/2 BALSA TRAILING EDGES AILERON ROD DISCONNECT AILERON TORQUE WIRE 1/4 BALSA AILERON SPAR METAL CLIP ON SPAR FOR WING RIGGING WIRES 3/16 TRIANGULAR FILLETS 1/16 BALSA ALL WING RIBS I/8X 1/4 SPRUCE SPARS FRONT AND REAR 1/16 BALSA L E COVER TOP AND BOTTOM 1/8 PLYWDD WING TIPS I/16X 3/16 BALSA TIP BOW LAMINATED 1931 Bob Hall Zantford Granville designed new plane first strictly racing model model Z Rolled out shop August 22 1931 Gee Bee Z constructed using some duplicate modified parts used building model Ys Powered loaned Pratt & Whitney Wasp Jr engine used Laird Solution won 1930 Thompson Race basic fuselage structure welded chrome-moly tubing wing built wood using M6 airfoil cockpit cover ancestor bubble canopy transparent section fastened removable section top fuselage cover placed after pilot seated held position quick releas able fasteners inside cockpit Aircraft Product wheels brakes actuated full back position control stick directional brake control rudder pedals first day 1933 National Air Races Bob Hall won 25mile race Menasco-powered D model Zantford Granville fourth 30mile race flying Warnerpowered model E Mary Haislip Menasco powered D Maude Tait Warnerpowered E won second third two womens events Lowell Bayles won Shell qualifying event Z 26734 mph new record Bob Hall second 21386 model Y Rudder belicrank spring-loaded cables running aft rudder pushrod extreme left crank Passing over two pushrods engage horns attached aileron torque tubeplan detail shows uncommonly simple coupling arrangement inner torque tube wings Hubber-scale builders will appreciate photo looking aft stringers permit almost shell-like structure weight impor tant can no business basic boxes other popular crudi ties Note bushed pushrod guide also provides stiffening way wasand clearly dont have take word Tile shock strut covers thin aluminum Front view plan shows cross sections both built-up balsa boots Pants can hollowed balsa blocks Granger made two halves using plywood frames two layers glass clothhalves screw together Gear can permanently fixed detachabledetails text help detailed photo plans can duplicate actual strut arrangement real aircraftnote shock-absorbing coil spring Jr cylinders configured just two rings very simple arrangement designer advises loca tion center gravity must behind 18% wing chord FULL SIZE PLANS AVAILABLE SEE PAGE 128 Bayles won 50mile race Z Bob Hall second placeuntil hit water tower forced land two feet wing tip gone model Y Bob Hall won General Tire Trophy Z won mixed free-for-all race also Z Maude Tait won Aerol Trophy Y Lowell Bayles won Thompson Trophy race 23623 mph Z Bob Hall fourth Y too bad first year Gee Bee racing group November 1931 750-hp Pratt & Whit ney Wasp Sr engine installed Gee Bee Z attempt set new speed record Several tries made during November early December set record propeller engine problems kept completing required four passes over course December 5 Bayles flew Z about 1000 feet five miles course went dive gain speed As levelled out roared through course first pass airplane suddenly dipped level flight pulled up sharply right wing folded up Z rolled twice right before crashed exploded physical evidence scene motion pictures crash inspected frame frame leading conclusion loose gas cap started trouble Apparently cap flew off striking cockpit cover canopy shattered inward blinding Bayles causing him lose control Designer Bob Hall said Gee Bee sensitive longitudinally added stress dip pull-up caused right wing fall Speed time estimated excess 325 mph first unfortunate series mishaps exploited news papers hack writers seeking capitalize sensationalism Much information adapted book Gee Bee Story Charles Man drake additional information correc tions Bob Granville Building Model Gee Bee i tired same old quickly-built easy-flying muchmodified scale models never look like original airplaneyou ready take chal lenge exact scale model unusual airplane choose Gee Bee racer because intrigues everyone experts tells wont fly serious enough make exact scale say welcome exclusive group model builders fliers other hand people think scale models will fly unless redesign bigger tails dif ferent airfoils shorter landing gear some other abortive change because know original designer forget buddy talk same language afraid challenge exact scale model presents lousy pilot model Gee Bee Z exact scale proportions aerodynamic layout flying stability equal good high per fonnance model has flown will Continued page 106 ltttj1 . - - -t I .. j 77 j I -t I/ /\ Vh vrr1v II -~1 -A -~2 Painstaking attention engine c pro duced life-like P&W Particularly note Tamitiar trademark location case shaft well pushrod attachment case Plans show balsa ring cowl construction Granger used two-layer fiberglass shell aluminum ring back Granger Z recommends wheel land ings warns against 3-pointers Describes mod ification tires enabled ship take off concrete runways problem begin ning comments proper handling during roll-out after touchdown GeeBee lore fly Fast Combat now am wonder ing could pass along either Mr Hempel Mr Upton someone has experience jets What primarily need know current designs Jet Speed planes could get plans Also recommended Dyna Jet Raven Assuming arent kept secret what some reworking processes done jets make faster other cutting off air nozzle enlarging holes flowiector Dyna Jet Does Curtiss Dyna still make Dyna Jet Any information may able supply will greatly appreci ated Thank very much Cam Dix Ontario Canada have put Mr Dix touch Mike Langlois did wizard article CL Super Burp December 1978 issue MA publishes occasional state-of-the-art articles ob scure types models competition just such purposesto get data down somewhere long-lasting refer ences now possible bellowing sounds wafting across Cam s ho metown Don Mills entire pro vince Ontario yes under stand Curtiss still has Dyna Jets Al discount advertisers has offered item recently Likes Half-A Scale Just few lines let know think choice construction pro jects excellent particularly im pressed Wildcat Bowers SruH have around B-25 March issue would like encourage publish addi tional Frank Baker multisthat A-26 looks very interesting I C Sloane East Hanover NJ Alas JC dont weve got works Hurst cooking up Lockheed Air Express Gee Bee Z/Williams continued page 17 fly itself has no bad habits Landings best made wheel landings try three-point Quick rudder action roll-out necessary avoid ground ioops asphalt other hard surface tail-wheel comes contact small tail-wheel built end tailskid use hard-surfaced runways unable fly airplane off asphalt concrete until some special tires made grinding groove regular tires snapping 0 ring made polypropelene done allowing tires slide no takeoff problems experienced Full backstick required keep tail down push throttle open ease stick forward speed increases ship comes off little back stick 30 50 feet depending upon wind 106 Model Aviation Please send _______________ copies new 5th edition Radio Control Buyers Guide Enclosed $825 copy ordered $725 retail plus $100 postage handling City State ZIP _________________________________________ Return RC Buyers Guide Clifton House Clifton VA 22024 LOOKING FOR A BETTER FIELD BOX VIM RflY Look Aerotrend best market Tested approved reccomended RCM FM MAN magazines Flyin Box right made super durable fiberglas shipped completely assembled stor age bins flip-up plane supports folding legs wood boxesleft offer similar range features low low price Both types offered deluxe models built-In power panels other access ories SEND SA&E FOR FREE CATALOG SHOWING ALL OUR FINE PRODUCTS ST PROSPECT STREET AEROTREND PRODUCTS EAVEN CT 06515 2 $8995 Assembled condition Special tires necessary dirt grass important thing remember about model allow center gravity CG get behind recommended 18 percent wing chord back forward wing spar full-size Gee Bee racers lost 1935 CG limits ignored inexperienced pilot modified aircraft incorporate larger fuel tanks cross-country Bendix race Unfortunately accident blamed design airplane news media feel competent test fly model Gee Bee find good experi enced scale model flier help Believe expert pattern fliers qualified fly airplane Construction I started cutting out fuse lage bulkheads Below top longeron bulkheads made 3/32 sheet balsa 1/64 plywood glued side Temporarily glue X strip wood sides bulkheads top hold being glued top basswood longerons Pin building board carefully align square some other right-angle tool lower half fuselage built upside down board Glue bottom center basswood stringer place clamp pin bulkheads Recheck alignment Glue couple diagonal braces X basswood top bulkhead #A bottom bulkhead #D Now can lay rest medium-hard balsa stringers around fuse lage Fill between stringers 3/32 balsa strips indicated planking Let unit set day two Cut wing ribs out using patterns shown change alrfoil shape thickness racing plane trainer Assemble ribs spars proper order position Cement leading trailing edges place laminate wing tips basswood best results Cut 1/16 sheet balsa leading edge planking trim fit well Cement place sand leading edge proper shape Install aileron hinges torque rods plug-in dowels flying wire fittings landing gear will removable bend shape sewn bolted attachment fasten bulkheads glue ply wood root ribs place Make sure both correct angle want removable landing gear did make up angle brackets aluminum drill gear screw holes Bolt bulkheads bolt root ribs shaped wing-root fairings front bulkhead back made balsa block hollowed out 3/32 balsa planking Cracks low spots filled Maglc Patch similar materiaL Make front contoured section tween 3/16 plywood firewall bulkhead #A out balsa blocks thick sheet stock Hollow out about kness Remove STATEMENT OF OWNERSHIP MANAGEMENT ANO CIRCULATION Pq,dlt 399 SC 1681 1Tttaot PuOIoaton MODEL AVIATION Pobhcaton No 793d 2Date Flng Seotembet 14 1979 3FteooettooOtlssoe Motttflln No 01 Isaac PoEIofled Attnaalo 12 R Annual Sobsonptton Ptce $1600 4 Locatonotlnnossnottceol poblcasonlsteetotvcountostateandZlP codel Pttttetsl baN Ftseenth NI NW Puashttaton DC 2000N N Lopattolt Dl headDarets genetol bosness ol1ces PODISflPt pttttetsl GIN Ffteetth Dl NW WashngtOn DC 2DOON 6 Nattles Potnelete adanesses 01 Puhltsflet Edtpt Manaattg hdtot Pobnshe Cal S Wheeln 6th FIteentflht NWPlaahinglonDC2DSTN PatIo Wllatt 4 Wnte 815 Ftteenth Nt NW WashndtDn DC 20005 Manaona Edto NONE 7 Opane Apadetnto 01 Model Oeonaotcs St N Flteetth Nt asflngtot DC 2OGGN Known Nondholdets tnontaaaees Othet secuttp holdets 0othflg ot hold nul%otttoneottotalantoontotbondsmottgagesot otnelsacottles NONE 9 Fotcotnptetonbononptott otganoatottsaothotoedtomal aIspactal tates lNePsOn 132 122 PDMI outoose lnnpton noonofI 01 ths otganaa tSc enempt stab tot Fedeta noonte tao PuPosps haun hhanaeadutna PtePedtng 12 noontha ID F slant Nato, oIC,ootaton 601001 Aoeaoeno popes no nopnsol sndle do,ngpoElshed ptnpedngneatest l2tnonthstlnodate ATotal No Copes P,nted Net Pesa SonI5467262275 SPaOCtcoatnn 1hal ea thtoooh Oealns Cattets Ntpot Vendots Coontet Dalpa2175 2252 2Mal hohscnpsons4h664h61d6 CTotal Pad C,colaton4913959290 OFteeosttEosonhhMalcattet otOthat Means hampton Contpltnentatoand Othe Fee CoPtes28062212 CTotalDatnEotonlhotnotC&DI5294761610 FCopesNoOst,Noted 1Ott Ce Use Left Ooet Unapononted Opo led alte Pt nI ny1 429653 2Rotons toot howl Agents28612 OTotailNotnot FF1 and2 Ptouldeooa help less ton shownn Al5467262275 11 lpetttothafthasoatomPntsntadehhmPabOoeatpoottePt andoomplete CARLO PInFELCY Puhltahat fuselage structure building board cement contoured section place Place waxed paper top longerons back #D bulkhead pin upper sections bulkheads place Plank top fuse lage back cockpit headrest build adjustable unit indi cated cement stabilizer positive angle degree Leading edge up about 1/16 Build up vertical fin laminated leading edge airplane spent much time its back during asphalt takeoff attempts upper fin strengthened repalred several times Make tail-skid movable rudder control install small tall-wheel expect operate off hard-surface runway scale landing gear shock system works well made per plan Install englne radial mount suit engine Mine tipped 20 degrees right position working engine cylinder between two dummy cylinders scale engine 40-size series 71 K & B engine provides plenty power 115 Zinger prop fuel tank installed directly behind firewall left side fuselage after aileron rudder servos mounted Servos installed directly behind firewall under alongside 8-ounce tank receiver behind bulkhead #A battery pack located will balance aircraft Mine behind receiver extra weight adjustable stabilizer may have farther forward Rubber bands hold battery receiver place plenty foam wrap Lou Proctors streamlined wire #2 turnbuckles used rigging upper rigging wings attaches piece music wire across fuselage longerons Rig degree two wash-out both wings will some flexing torque rods ailerons no amount sloppiness should allowed 1/16 music wire pushrod supported center used elevator control Cables small stiff spring used rudder control Rudder bellcrank length critical link servo should just outside cable attachment point top fuselage hatch held place back internal rubber band front modified Dzues fastener Wheel pants could made hollowed balsa blocks However used two layers fiberglass cloth plywood frames allow pant halves screwed together cowling could made up balsa rings prefer two layers fiberglass cloth aluminum ring about 1/16 X 1/2 glassed back Drill screw holes through attachment stand-off fittings fastened firewall model covered natural Coverite except rudder stabilizer elevators covered Silkspan Several light coats clear Sig dope applied sanded Sig Cub yellow dope sprayed three coats lightly sanded weave cloth should still visible finished except metal covering simulated planking Scalloping numbers masked off sprayed Sig black dope Use 1/16-in wide red striping tape separation black yellow scalloping around numbers small lettering generally black except Springfield Air Racing Association Inc Powered P&W Wasp Hartahorn Steel Tie Rods Supersportster Aircraft Products Wheels & Brakes red Also red edging around Gee Bee rudder N77V Unless good small lettering striping unlikely will come up 108 Model Aviation MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS
Edition: Model Aviation - 1979/12
Page Numbers: 10, 11, 12, 13, 14, 15, 16, 17, 106, 108, 110
NO OCR TEXT NO OCR TEXT THE history aviation has produced few men enough courage gamble convictions Wright Brothers Glenn Curt iss Tony Fokker Clyde Cessna Giuseppe Bel lanca Don Douglas Walt Beech Jack Northrop some Granville Brothers Gee Bees remarkable aircraft con tributed greatly advancement aerody namic engineering Granvilles innovations used other aircraft years Yet news media jumped misfortunes befalling built aircraft blowing mishap completely out proportion actuality expanding news accidents catas trophy contributed downfall Granville Brothers Aircraft Company crashes involving Gee Bee aircraft human fail ure pilot error contributed mech anical failures secondary factor Gee Bees aircraft originally designed flown good airplanes Only modified greater horsepower fuel tankage did get trouble stability problems changes authorized manufac turer Most people under impression Doolittle successfully fly Gee Bee R1 flew time Thompson Trophy race fact R1 racer test-flown number times Russell Boardman before Doolittle saw airplanes Doolittle flew R1 several times before Thompson race qualifying racer dedicated scale man 40powered model exact scale version real City Spring fieldeven aerodynamic set-up Granger Williams Shell event trying establish worlds speed record Other pilots flew Gee Bee racers included Lee Gehlbach Russell Thaw Roy Minor Jimmy Haislip Lee Gehlback test flew R2 flew both Bendix Thompson races first aircraft produced Granvilles 1929 small two place biplane side-byside seating Powered 60-hp Velie M5 engine unusual feature adjustable wing flap could changed flight various angles allowed unusually low landing speed still gave good flying perfor mance factory set up company turned building model Biplanes Early 1930 American Flying Derby organized sponsored American Cirrus Engines Inc planes entered would powered Cirrus engines sold sponsors Cirrus engine four-cylinder in-line manufactured Michigan under English patents Springfield Granvilles made plans enter new plane American Derby An engineer Bob Hail joined Granvilles 1929 rest Granville organization produced first Gee Bee Sportster Model X features airplane carried through rest Gee Bee Sportsters racers through 1934 Bob Hall later turn design talents World War 2 Grumman Aircraft Wing span Model X 25 feetsingle-place opencockpit monoplane powered inverted Cirrus engine developing 95 hp at2 100 rpm wing shape same used suc ceeding Gee Bee designs through 1933 Pilot new creation Lowell Bayles flown everything Jennies Ford trimotors After flying derby impressed performance little sportster bought own use fast safe dependable sport plane Production models Gee Bee X fitted engines Two GeeBees two pilots Right Granger Williams Z article Bill Turner GeeBee Miss Los Angeles especially builtboth now flying Most important factor excellent performance Grangers Z its light weight Its struc ture based closely upon Vein Clements CL planVein specialized GeeBees some 25 years side bottom views basic fuselage show root fairings tailor fuselage including 95hp Cirrus model B 95hp Menasco model C 125-hp Menasco model D 135-hp Ranger Model F Radial engined versions powered 1 10hp Warner model E new two-place Senior Sportater Gee Bee designated model Y larger D model 20% designed 210-hp Kinner 215hp Lycoming 240-hp Wright J6 Pratt & Whitney Wasp Jr 300 hp / outside GeeBee exactly like its big counterpart Lowell Bayles looked inside saw nothing like thisl Servos rud der aileron installed before 8oz tank located under neath side tank immediately behind firewall ciuser view uwe outaims uewne seiu -evident Uoi irue tie rod runs woss cockpit attach points wing wires Front view plan makes clear location fourservos Foamwrapped battery pack appears extreme right photo une psesure truy worth 1000 words Especially interesting treat ment landing gear arrangement functional scale rigging wires Proctor streamlined wire No 2 turnbuckles brace wing take sideloads gear Reaay-so-ve-coverea L evokes special feeling real aircraft K&B 40-sized series 71 tipped 20 degrees position working cyl inder between two dummy cylinders Plenty power Zinger 11-5 TATONE ENGINE MOUNT K 8 B 40 ENGINE AT 400 TILT PLASTIC WASP 9 CYL ENGINE FROM WILLIAMS BROS 3/32 X 3/8 BALSA PLANKING FORMER V16 WIRE TIE ROD ON TOP OF FORMER FORMER B B-i BALSA SHEET COWL RINGS OR FORMED FIBERGLASS 3/16 PLYWOOD FIREWALL BETWEEN LOUVERED CcYAL AND RADIAL ENGINE MOUNT ___7 A74fA CAL ~ GLIOC LOTf k77 7-9 A/C 1/8 BRASS TUBING INSIDE SHOCK SPRING METAL COVER GAP UNDER COWLING REAR RIM FOR AIR COOLING N N N BALSA BLOCKS 3/32 WIRE MAINS IAMS BROS 143 SMOOTH WHEELS 3/32 WIRE MAINMETAL PI\OT FORK STRUTBRACKETTURNBUCKLES ANCHOR 10 1/32 WIRE FIBERGLASS FNrS OR BALSA LAMiNATES 1/8 BALSA FORMS UNDER REMOVABLE HATCH AILERON BELLCRANKS FORMER D 1/16 X 3/16 BALSA FOR ALL STRINGERS FORMER E 3/16 SQ SPRUCE FIN POST 3/32 PLYVJCOD PROCTOR STREAMLINE WIRES / 1/16 SHEET BALSA CORE IN RUDDER AND STABILIZER 1/8 DOWEL TORQUE TUBES 1/32 PLY RUDDER HORNS 1/16 X 1/8 BALSA EDGE LAMINATES N WIRE BRACED STRUT TO SPAR BIKE SPOKE SCREW JACK ON 3/32 PLYWCOD PLATFORM ELEVATOR 8ELLCRANK ---- TAIL SKID WITH WHEEL AT BASE 1/16 PLYWOOD FILLET T E 1/8 X 1/2 BALSA TRAILING EDGES AILERON ROD DISCONNECT AILERON TORQUE WIRE 1/4 BALSA AILERON SPAR METAL CLIP ON SPAR FOR WING RIGGING WIRES 3/16 TRIANGULAR FILLETS 1/16 BALSA ALL WING RIBS I/8X 1/4 SPRUCE SPARS FRONT AND REAR 1/16 BALSA L E COVER TOP AND BOTTOM 1/8 PLYWDD WING TIPS I/16X 3/16 BALSA TIP BOW LAMINATED 1931 Bob Hall Zantford Granville designed new plane first strictly racing model model Z Rolled out shop August 22 1931 Gee Bee Z constructed using some duplicate modified parts used building model Ys Powered loaned Pratt & Whitney Wasp Jr engine used Laird Solution won 1930 Thompson Race basic fuselage structure welded chrome-moly tubing wing built wood using M6 airfoil cockpit cover ancestor bubble canopy transparent section fastened removable section top fuselage cover placed after pilot seated held position quick releas able fasteners inside cockpit Aircraft Product wheels brakes actuated full back position control stick directional brake control rudder pedals first day 1933 National Air Races Bob Hall won 25mile race Menasco-powered D model Zantford Granville fourth 30mile race flying Warnerpowered model E Mary Haislip Menasco powered D Maude Tait Warnerpowered E won second third two womens events Lowell Bayles won Shell qualifying event Z 26734 mph new record Bob Hall second 21386 model Y Rudder belicrank spring-loaded cables running aft rudder pushrod extreme left crank Passing over two pushrods engage horns attached aileron torque tubeplan detail shows uncommonly simple coupling arrangement inner torque tube wings Hubber-scale builders will appreciate photo looking aft stringers permit almost shell-like structure weight impor tant can no business basic boxes other popular crudi ties Note bushed pushrod guide also provides stiffening way wasand clearly dont have take word Tile shock strut covers thin aluminum Front view plan shows cross sections both built-up balsa boots Pants can hollowed balsa blocks Granger made two halves using plywood frames two layers glass clothhalves screw together Gear can permanently fixed detachabledetails text help detailed photo plans can duplicate actual strut arrangement real aircraftnote shock-absorbing coil spring Jr cylinders configured just two rings very simple arrangement designer advises loca tion center gravity must behind 18% wing chord FULL SIZE PLANS AVAILABLE SEE PAGE 128 Bayles won 50mile race Z Bob Hall second placeuntil hit water tower forced land two feet wing tip gone model Y Bob Hall won General Tire Trophy Z won mixed free-for-all race also Z Maude Tait won Aerol Trophy Y Lowell Bayles won Thompson Trophy race 23623 mph Z Bob Hall fourth Y too bad first year Gee Bee racing group November 1931 750-hp Pratt & Whit ney Wasp Sr engine installed Gee Bee Z attempt set new speed record Several tries made during November early December set record propeller engine problems kept completing required four passes over course December 5 Bayles flew Z about 1000 feet five miles course went dive gain speed As levelled out roared through course first pass airplane suddenly dipped level flight pulled up sharply right wing folded up Z rolled twice right before crashed exploded physical evidence scene motion pictures crash inspected frame frame leading conclusion loose gas cap started trouble Apparently cap flew off striking cockpit cover canopy shattered inward blinding Bayles causing him lose control Designer Bob Hall said Gee Bee sensitive longitudinally added stress dip pull-up caused right wing fall Speed time estimated excess 325 mph first unfortunate series mishaps exploited news papers hack writers seeking capitalize sensationalism Much information adapted book Gee Bee Story Charles Man drake additional information correc tions Bob Granville Building Model Gee Bee i tired same old quickly-built easy-flying muchmodified scale models never look like original airplaneyou ready take chal lenge exact scale model unusual airplane choose Gee Bee racer because intrigues everyone experts tells wont fly serious enough make exact scale say welcome exclusive group model builders fliers other hand people think scale models will fly unless redesign bigger tails dif ferent airfoils shorter landing gear some other abortive change because know original designer forget buddy talk same language afraid challenge exact scale model presents lousy pilot model Gee Bee Z exact scale proportions aerodynamic layout flying stability equal good high per fonnance model has flown will Continued page 106 ltttj1 . - - -t I .. j 77 j I -t I/ /\ Vh vrr1v II -~1 -A -~2 Painstaking attention engine c pro duced life-like P&W Particularly note Tamitiar trademark location case shaft well pushrod attachment case Plans show balsa ring cowl construction Granger used two-layer fiberglass shell aluminum ring back Granger Z recommends wheel land ings warns against 3-pointers Describes mod ification tires enabled ship take off concrete runways problem begin ning comments proper handling during roll-out after touchdown GeeBee lore fly Fast Combat now am wonder ing could pass along either Mr Hempel Mr Upton someone has experience jets What primarily need know current designs Jet Speed planes could get plans Also recommended Dyna Jet Raven Assuming arent kept secret what some reworking processes done jets make faster other cutting off air nozzle enlarging holes flowiector Dyna Jet Does Curtiss Dyna still make Dyna Jet Any information may able supply will greatly appreci ated Thank very much Cam Dix Ontario Canada have put Mr Dix touch Mike Langlois did wizard article CL Super Burp December 1978 issue MA publishes occasional state-of-the-art articles ob scure types models competition just such purposesto get data down somewhere long-lasting refer ences now possible bellowing sounds wafting across Cam s ho metown Don Mills entire pro vince Ontario yes under stand Curtiss still has Dyna Jets Al discount advertisers has offered item recently Likes Half-A Scale Just few lines let know think choice construction pro jects excellent particularly im pressed Wildcat Bowers SruH have around B-25 March issue would like encourage publish addi tional Frank Baker multisthat A-26 looks very interesting I C Sloane East Hanover NJ Alas JC dont weve got works Hurst cooking up Lockheed Air Express Gee Bee Z/Williams continued page 17 fly itself has no bad habits Landings best made wheel landings try three-point Quick rudder action roll-out necessary avoid ground ioops asphalt other hard surface tail-wheel comes contact small tail-wheel built end tailskid use hard-surfaced runways unable fly airplane off asphalt concrete until some special tires made grinding groove regular tires snapping 0 ring made polypropelene done allowing tires slide no takeoff problems experienced Full backstick required keep tail down push throttle open ease stick forward speed increases ship comes off little back stick 30 50 feet depending upon wind 106 Model Aviation Please send _______________ copies new 5th edition Radio Control Buyers Guide Enclosed $825 copy ordered $725 retail plus $100 postage handling City State ZIP _________________________________________ Return RC Buyers Guide Clifton House Clifton VA 22024 LOOKING FOR A BETTER FIELD BOX VIM RflY Look Aerotrend best market Tested approved reccomended RCM FM MAN magazines Flyin Box right made super durable fiberglas shipped completely assembled stor age bins flip-up plane supports folding legs wood boxesleft offer similar range features low low price Both types offered deluxe models built-In power panels other access ories SEND SA&E FOR FREE CATALOG SHOWING ALL OUR FINE PRODUCTS ST PROSPECT STREET AEROTREND PRODUCTS EAVEN CT 06515 2 $8995 Assembled condition Special tires necessary dirt grass important thing remember about model allow center gravity CG get behind recommended 18 percent wing chord back forward wing spar full-size Gee Bee racers lost 1935 CG limits ignored inexperienced pilot modified aircraft incorporate larger fuel tanks cross-country Bendix race Unfortunately accident blamed design airplane news media feel competent test fly model Gee Bee find good experi enced scale model flier help Believe expert pattern fliers qualified fly airplane Construction I started cutting out fuse lage bulkheads Below top longeron bulkheads made 3/32 sheet balsa 1/64 plywood glued side Temporarily glue X strip wood sides bulkheads top hold being glued top basswood longerons Pin building board carefully align square some other right-angle tool lower half fuselage built upside down board Glue bottom center basswood stringer place clamp pin bulkheads Recheck alignment Glue couple diagonal braces X basswood top bulkhead #A bottom bulkhead #D Now can lay rest medium-hard balsa stringers around fuse lage Fill between stringers 3/32 balsa strips indicated planking Let unit set day two Cut wing ribs out using patterns shown change alrfoil shape thickness racing plane trainer Assemble ribs spars proper order position Cement leading trailing edges place laminate wing tips basswood best results Cut 1/16 sheet balsa leading edge planking trim fit well Cement place sand leading edge proper shape Install aileron hinges torque rods plug-in dowels flying wire fittings landing gear will removable bend shape sewn bolted attachment fasten bulkheads glue ply wood root ribs place Make sure both correct angle want removable landing gear did make up angle brackets aluminum drill gear screw holes Bolt bulkheads bolt root ribs shaped wing-root fairings front bulkhead back made balsa block hollowed out 3/32 balsa planking Cracks low spots filled Maglc Patch similar materiaL Make front contoured section tween 3/16 plywood firewall bulkhead #A out balsa blocks thick sheet stock Hollow out about kness Remove STATEMENT OF OWNERSHIP MANAGEMENT ANO CIRCULATION Pq,dlt 399 SC 1681 1Tttaot PuOIoaton MODEL AVIATION Pobhcaton No 793d 2Date Flng Seotembet 14 1979 3FteooettooOtlssoe Motttflln No 01 Isaac PoEIofled Attnaalo 12 R Annual Sobsonptton Ptce $1600 4 Locatonotlnnossnottceol poblcasonlsteetotvcountostateandZlP codel Pttttetsl baN Ftseenth NI NW Puashttaton DC 2000N N Lopattolt Dl headDarets genetol bosness ol1ces PODISflPt pttttetsl GIN Ffteetth Dl NW WashngtOn DC 2DOON 6 Nattles Potnelete adanesses 01 Puhltsflet Edtpt Manaattg hdtot Pobnshe Cal S Wheeln 6th FIteentflht NWPlaahinglonDC2DSTN PatIo Wllatt 4 Wnte 815 Ftteenth Nt NW WashndtDn DC 20005 Manaona Edto NONE 7 Opane Apadetnto 01 Model Oeonaotcs St N Flteetth Nt asflngtot DC 2OGGN Known Nondholdets tnontaaaees Othet secuttp holdets 0othflg ot hold nul%otttoneottotalantoontotbondsmottgagesot otnelsacottles NONE 9 Fotcotnptetonbononptott otganoatottsaothotoedtomal aIspactal tates lNePsOn 132 122 PDMI outoose lnnpton noonofI 01 ths otganaa tSc enempt stab tot Fedeta noonte tao PuPosps haun hhanaeadutna PtePedtng 12 noontha ID F slant Nato, oIC,ootaton 601001 Aoeaoeno popes no nopnsol sndle do,ngpoElshed ptnpedngneatest l2tnonthstlnodate ATotal No Copes P,nted Net Pesa SonI5467262275 SPaOCtcoatnn 1hal ea thtoooh Oealns Cattets Ntpot Vendots Coontet Dalpa2175 2252 2Mal hohscnpsons4h664h61d6 CTotal Pad C,colaton4913959290 OFteeosttEosonhhMalcattet otOthat Means hampton Contpltnentatoand Othe Fee CoPtes28062212 CTotalDatnEotonlhotnotC&DI5294761610 FCopesNoOst,Noted 1Ott Ce Use Left Ooet Unapononted Opo led alte Pt nI ny1 429653 2Rotons toot howl Agents28612 OTotailNotnot FF1 and2 Ptouldeooa help less ton shownn Al5467262275 11 lpetttothafthasoatomPntsntadehhmPabOoeatpoottePt andoomplete CARLO PInFELCY Puhltahat fuselage structure building board cement contoured section place Place waxed paper top longerons back #D bulkhead pin upper sections bulkheads place Plank top fuse lage back cockpit headrest build adjustable unit indi cated cement stabilizer positive angle degree Leading edge up about 1/16 Build up vertical fin laminated leading edge airplane spent much time its back during asphalt takeoff attempts upper fin strengthened repalred several times Make tail-skid movable rudder control install small tall-wheel expect operate off hard-surface runway scale landing gear shock system works well made per plan Install englne radial mount suit engine Mine tipped 20 degrees right position working engine cylinder between two dummy cylinders scale engine 40-size series 71 K & B engine provides plenty power 115 Zinger prop fuel tank installed directly behind firewall left side fuselage after aileron rudder servos mounted Servos installed directly behind firewall under alongside 8-ounce tank receiver behind bulkhead #A battery pack located will balance aircraft Mine behind receiver extra weight adjustable stabilizer may have farther forward Rubber bands hold battery receiver place plenty foam wrap Lou Proctors streamlined wire #2 turnbuckles used rigging upper rigging wings attaches piece music wire across fuselage longerons Rig degree two wash-out both wings will some flexing torque rods ailerons no amount sloppiness should allowed 1/16 music wire pushrod supported center used elevator control Cables small stiff spring used rudder control Rudder bellcrank length critical link servo should just outside cable attachment point top fuselage hatch held place back internal rubber band front modified Dzues fastener Wheel pants could made hollowed balsa blocks However used two layers fiberglass cloth plywood frames allow pant halves screwed together cowling could made up balsa rings prefer two layers fiberglass cloth aluminum ring about 1/16 X 1/2 glassed back Drill screw holes through attachment stand-off fittings fastened firewall model covered natural Coverite except rudder stabilizer elevators covered Silkspan Several light coats clear Sig dope applied sanded Sig Cub yellow dope sprayed three coats lightly sanded weave cloth should still visible finished except metal covering simulated planking Scalloping numbers masked off sprayed Sig black dope Use 1/16-in wide red striping tape separation black yellow scalloping around numbers small lettering generally black except Springfield Air Racing Association Inc Powered P&W Wasp Hartahorn Steel Tie Rods Supersportster Aircraft Products Wheels & Brakes red Also red edging around Gee Bee rudder N77V Unless good small lettering striping unlikely will come up 108 Model Aviation MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS
Edition: Model Aviation - 1979/12
Page Numbers: 10, 11, 12, 13, 14, 15, 16, 17, 106, 108, 110
NO OCR TEXT NO OCR TEXT THE history aviation has produced few men enough courage gamble convictions Wright Brothers Glenn Curt iss Tony Fokker Clyde Cessna Giuseppe Bel lanca Don Douglas Walt Beech Jack Northrop some Granville Brothers Gee Bees remarkable aircraft con tributed greatly advancement aerody namic engineering Granvilles innovations used other aircraft years Yet news media jumped misfortunes befalling built aircraft blowing mishap completely out proportion actuality expanding news accidents catas trophy contributed downfall Granville Brothers Aircraft Company crashes involving Gee Bee aircraft human fail ure pilot error contributed mech anical failures secondary factor Gee Bees aircraft originally designed flown good airplanes Only modified greater horsepower fuel tankage did get trouble stability problems changes authorized manufac turer Most people under impression Doolittle successfully fly Gee Bee R1 flew time Thompson Trophy race fact R1 racer test-flown number times Russell Boardman before Doolittle saw airplanes Doolittle flew R1 several times before Thompson race qualifying racer dedicated scale man 40powered model exact scale version real City Spring fieldeven aerodynamic set-up Granger Williams Shell event trying establish worlds speed record Other pilots flew Gee Bee racers included Lee Gehlbach Russell Thaw Roy Minor Jimmy Haislip Lee Gehlback test flew R2 flew both Bendix Thompson races first aircraft produced Granvilles 1929 small two place biplane side-byside seating Powered 60-hp Velie M5 engine unusual feature adjustable wing flap could changed flight various angles allowed unusually low landing speed still gave good flying perfor mance factory set up company turned building model Biplanes Early 1930 American Flying Derby organized sponsored American Cirrus Engines Inc planes entered would powered Cirrus engines sold sponsors Cirrus engine four-cylinder in-line manufactured Michigan under English patents Springfield Granvilles made plans enter new plane American Derby An engineer Bob Hail joined Granvilles 1929 rest Granville organization produced first Gee Bee Sportster Model X features airplane carried through rest Gee Bee Sportsters racers through 1934 Bob Hall later turn design talents World War 2 Grumman Aircraft Wing span Model X 25 feetsingle-place opencockpit monoplane powered inverted Cirrus engine developing 95 hp at2 100 rpm wing shape same used suc ceeding Gee Bee designs through 1933 Pilot new creation Lowell Bayles flown everything Jennies Ford trimotors After flying derby impressed performance little sportster bought own use fast safe dependable sport plane Production models Gee Bee X fitted engines Two GeeBees two pilots Right Granger Williams Z article Bill Turner GeeBee Miss Los Angeles especially builtboth now flying Most important factor excellent performance Grangers Z its light weight Its struc ture based closely upon Vein Clements CL planVein specialized GeeBees some 25 years side bottom views basic fuselage show root fairings tailor fuselage including 95hp Cirrus model B 95hp Menasco model C 125-hp Menasco model D 135-hp Ranger Model F Radial engined versions powered 1 10hp Warner model E new two-place Senior Sportater Gee Bee designated model Y larger D model 20% designed 210-hp Kinner 215hp Lycoming 240-hp Wright J6 Pratt & Whitney Wasp Jr 300 hp / outside GeeBee exactly like its big counterpart Lowell Bayles looked inside saw nothing like thisl Servos rud der aileron installed before 8oz tank located under neath side tank immediately behind firewall ciuser view uwe outaims uewne seiu -evident Uoi irue tie rod runs woss cockpit attach points wing wires Front view plan makes clear location fourservos Foamwrapped battery pack appears extreme right photo une psesure truy worth 1000 words Especially interesting treat ment landing gear arrangement functional scale rigging wires Proctor streamlined wire No 2 turnbuckles brace wing take sideloads gear Reaay-so-ve-coverea L evokes special feeling real aircraft K&B 40-sized series 71 tipped 20 degrees position working cyl inder between two dummy cylinders Plenty power Zinger 11-5 TATONE ENGINE MOUNT K 8 B 40 ENGINE AT 400 TILT PLASTIC WASP 9 CYL ENGINE FROM WILLIAMS BROS 3/32 X 3/8 BALSA PLANKING FORMER V16 WIRE TIE ROD ON TOP OF FORMER FORMER B B-i BALSA SHEET COWL RINGS OR FORMED FIBERGLASS 3/16 PLYWOOD FIREWALL BETWEEN LOUVERED CcYAL AND RADIAL ENGINE MOUNT ___7 A74fA CAL ~ GLIOC LOTf k77 7-9 A/C 1/8 BRASS TUBING INSIDE SHOCK SPRING METAL COVER GAP UNDER COWLING REAR RIM FOR AIR COOLING N N N BALSA BLOCKS 3/32 WIRE MAINS IAMS BROS 143 SMOOTH WHEELS 3/32 WIRE MAINMETAL PI\OT FORK STRUTBRACKETTURNBUCKLES ANCHOR 10 1/32 WIRE FIBERGLASS FNrS OR BALSA LAMiNATES 1/8 BALSA FORMS UNDER REMOVABLE HATCH AILERON BELLCRANKS FORMER D 1/16 X 3/16 BALSA FOR ALL STRINGERS FORMER E 3/16 SQ SPRUCE FIN POST 3/32 PLYVJCOD PROCTOR STREAMLINE WIRES / 1/16 SHEET BALSA CORE IN RUDDER AND STABILIZER 1/8 DOWEL TORQUE TUBES 1/32 PLY RUDDER HORNS 1/16 X 1/8 BALSA EDGE LAMINATES N WIRE BRACED STRUT TO SPAR BIKE SPOKE SCREW JACK ON 3/32 PLYWCOD PLATFORM ELEVATOR 8ELLCRANK ---- TAIL SKID WITH WHEEL AT BASE 1/16 PLYWOOD FILLET T E 1/8 X 1/2 BALSA TRAILING EDGES AILERON ROD DISCONNECT AILERON TORQUE WIRE 1/4 BALSA AILERON SPAR METAL CLIP ON SPAR FOR WING RIGGING WIRES 3/16 TRIANGULAR FILLETS 1/16 BALSA ALL WING RIBS I/8X 1/4 SPRUCE SPARS FRONT AND REAR 1/16 BALSA L E COVER TOP AND BOTTOM 1/8 PLYWDD WING TIPS I/16X 3/16 BALSA TIP BOW LAMINATED 1931 Bob Hall Zantford Granville designed new plane first strictly racing model model Z Rolled out shop August 22 1931 Gee Bee Z constructed using some duplicate modified parts used building model Ys Powered loaned Pratt & Whitney Wasp Jr engine used Laird Solution won 1930 Thompson Race basic fuselage structure welded chrome-moly tubing wing built wood using M6 airfoil cockpit cover ancestor bubble canopy transparent section fastened removable section top fuselage cover placed after pilot seated held position quick releas able fasteners inside cockpit Aircraft Product wheels brakes actuated full back position control stick directional brake control rudder pedals first day 1933 National Air Races Bob Hall won 25mile race Menasco-powered D model Zantford Granville fourth 30mile race flying Warnerpowered model E Mary Haislip Menasco powered D Maude Tait Warnerpowered E won second third two womens events Lowell Bayles won Shell qualifying event Z 26734 mph new record Bob Hall second 21386 model Y Rudder belicrank spring-loaded cables running aft rudder pushrod extreme left crank Passing over two pushrods engage horns attached aileron torque tubeplan detail shows uncommonly simple coupling arrangement inner torque tube wings Hubber-scale builders will appreciate photo looking aft stringers permit almost shell-like structure weight impor tant can no business basic boxes other popular crudi ties Note bushed pushrod guide also provides stiffening way wasand clearly dont have take word Tile shock strut covers thin aluminum Front view plan shows cross sections both built-up balsa boots Pants can hollowed balsa blocks Granger made two halves using plywood frames two layers glass clothhalves screw together Gear can permanently fixed detachabledetails text help detailed photo plans can duplicate actual strut arrangement real aircraftnote shock-absorbing coil spring Jr cylinders configured just two rings very simple arrangement designer advises loca tion center gravity must behind 18% wing chord FULL SIZE PLANS AVAILABLE SEE PAGE 128 Bayles won 50mile race Z Bob Hall second placeuntil hit water tower forced land two feet wing tip gone model Y Bob Hall won General Tire Trophy Z won mixed free-for-all race also Z Maude Tait won Aerol Trophy Y Lowell Bayles won Thompson Trophy race 23623 mph Z Bob Hall fourth Y too bad first year Gee Bee racing group November 1931 750-hp Pratt & Whit ney Wasp Sr engine installed Gee Bee Z attempt set new speed record Several tries made during November early December set record propeller engine problems kept completing required four passes over course December 5 Bayles flew Z about 1000 feet five miles course went dive gain speed As levelled out roared through course first pass airplane suddenly dipped level flight pulled up sharply right wing folded up Z rolled twice right before crashed exploded physical evidence scene motion pictures crash inspected frame frame leading conclusion loose gas cap started trouble Apparently cap flew off striking cockpit cover canopy shattered inward blinding Bayles causing him lose control Designer Bob Hall said Gee Bee sensitive longitudinally added stress dip pull-up caused right wing fall Speed time estimated excess 325 mph first unfortunate series mishaps exploited news papers hack writers seeking capitalize sensationalism Much information adapted book Gee Bee Story Charles Man drake additional information correc tions Bob Granville Building Model Gee Bee i tired same old quickly-built easy-flying muchmodified scale models never look like original airplaneyou ready take chal lenge exact scale model unusual airplane choose Gee Bee racer because intrigues everyone experts tells wont fly serious enough make exact scale say welcome exclusive group model builders fliers other hand people think scale models will fly unless redesign bigger tails dif ferent airfoils shorter landing gear some other abortive change because know original designer forget buddy talk same language afraid challenge exact scale model presents lousy pilot model Gee Bee Z exact scale proportions aerodynamic layout flying stability equal good high per fonnance model has flown will Continued page 106 ltttj1 . - - -t I .. j 77 j I -t I/ /\ Vh vrr1v II -~1 -A -~2 Painstaking attention engine c pro duced life-like P&W Particularly note Tamitiar trademark location case shaft well pushrod attachment case Plans show balsa ring cowl construction Granger used two-layer fiberglass shell aluminum ring back Granger Z recommends wheel land ings warns against 3-pointers Describes mod ification tires enabled ship take off concrete runways problem begin ning comments proper handling during roll-out after touchdown GeeBee lore fly Fast Combat now am wonder ing could pass along either Mr Hempel Mr Upton someone has experience jets What primarily need know current designs Jet Speed planes could get plans Also recommended Dyna Jet Raven Assuming arent kept secret what some reworking processes done jets make faster other cutting off air nozzle enlarging holes flowiector Dyna Jet Does Curtiss Dyna still make Dyna Jet Any information may able supply will greatly appreci ated Thank very much Cam Dix Ontario Canada have put Mr Dix touch Mike Langlois did wizard article CL Super Burp December 1978 issue MA publishes occasional state-of-the-art articles ob scure types models competition just such purposesto get data down somewhere long-lasting refer ences now possible bellowing sounds wafting across Cam s ho metown Don Mills entire pro vince Ontario yes under stand Curtiss still has Dyna Jets Al discount advertisers has offered item recently Likes Half-A Scale Just few lines let know think choice construction pro jects excellent particularly im pressed Wildcat Bowers SruH have around B-25 March issue would like encourage publish addi tional Frank Baker multisthat A-26 looks very interesting I C Sloane East Hanover NJ Alas JC dont weve got works Hurst cooking up Lockheed Air Express Gee Bee Z/Williams continued page 17 fly itself has no bad habits Landings best made wheel landings try three-point Quick rudder action roll-out necessary avoid ground ioops asphalt other hard surface tail-wheel comes contact small tail-wheel built end tailskid use hard-surfaced runways unable fly airplane off asphalt concrete until some special tires made grinding groove regular tires snapping 0 ring made polypropelene done allowing tires slide no takeoff problems experienced Full backstick required keep tail down push throttle open ease stick forward speed increases ship comes off little back stick 30 50 feet depending upon wind 106 Model Aviation Please send _______________ copies new 5th edition Radio Control Buyers Guide Enclosed $825 copy ordered $725 retail plus $100 postage handling City State ZIP _________________________________________ Return RC Buyers Guide Clifton House Clifton VA 22024 LOOKING FOR A BETTER FIELD BOX VIM RflY Look Aerotrend best market Tested approved reccomended RCM FM MAN magazines Flyin Box right made super durable fiberglas shipped completely assembled stor age bins flip-up plane supports folding legs wood boxesleft offer similar range features low low price Both types offered deluxe models built-In power panels other access ories SEND SA&E FOR FREE CATALOG SHOWING ALL OUR FINE PRODUCTS ST PROSPECT STREET AEROTREND PRODUCTS EAVEN CT 06515 2 $8995 Assembled condition Special tires necessary dirt grass important thing remember about model allow center gravity CG get behind recommended 18 percent wing chord back forward wing spar full-size Gee Bee racers lost 1935 CG limits ignored inexperienced pilot modified aircraft incorporate larger fuel tanks cross-country Bendix race Unfortunately accident blamed design airplane news media feel competent test fly model Gee Bee find good experi enced scale model flier help Believe expert pattern fliers qualified fly airplane Construction I started cutting out fuse lage bulkheads Below top longeron bulkheads made 3/32 sheet balsa 1/64 plywood glued side Temporarily glue X strip wood sides bulkheads top hold being glued top basswood longerons Pin building board carefully align square some other right-angle tool lower half fuselage built upside down board Glue bottom center basswood stringer place clamp pin bulkheads Recheck alignment Glue couple diagonal braces X basswood top bulkhead #A bottom bulkhead #D Now can lay rest medium-hard balsa stringers around fuse lage Fill between stringers 3/32 balsa strips indicated planking Let unit set day two Cut wing ribs out using patterns shown change alrfoil shape thickness racing plane trainer Assemble ribs spars proper order position Cement leading trailing edges place laminate wing tips basswood best results Cut 1/16 sheet balsa leading edge planking trim fit well Cement place sand leading edge proper shape Install aileron hinges torque rods plug-in dowels flying wire fittings landing gear will removable bend shape sewn bolted attachment fasten bulkheads glue ply wood root ribs place Make sure both correct angle want removable landing gear did make up angle brackets aluminum drill gear screw holes Bolt bulkheads bolt root ribs shaped wing-root fairings front bulkhead back made balsa block hollowed out 3/32 balsa planking Cracks low spots filled Maglc Patch similar materiaL Make front contoured section tween 3/16 plywood firewall bulkhead #A out balsa blocks thick sheet stock Hollow out about kness Remove STATEMENT OF OWNERSHIP MANAGEMENT ANO CIRCULATION Pq,dlt 399 SC 1681 1Tttaot PuOIoaton MODEL AVIATION Pobhcaton No 793d 2Date Flng Seotembet 14 1979 3FteooettooOtlssoe Motttflln No 01 Isaac PoEIofled Attnaalo 12 R Annual Sobsonptton Ptce $1600 4 Locatonotlnnossnottceol poblcasonlsteetotvcountostateandZlP codel Pttttetsl baN Ftseenth NI NW Puashttaton DC 2000N N Lopattolt Dl headDarets genetol bosness ol1ces PODISflPt pttttetsl GIN Ffteetth Dl NW WashngtOn DC 2DOON 6 Nattles Potnelete adanesses 01 Puhltsflet Edtpt Manaattg hdtot Pobnshe Cal S Wheeln 6th FIteentflht NWPlaahinglonDC2DSTN PatIo Wllatt 4 Wnte 815 Ftteenth Nt NW WashndtDn DC 20005 Manaona Edto NONE 7 Opane Apadetnto 01 Model Oeonaotcs St N Flteetth Nt asflngtot DC 2OGGN Known Nondholdets tnontaaaees Othet secuttp holdets 0othflg ot hold nul%otttoneottotalantoontotbondsmottgagesot otnelsacottles NONE 9 Fotcotnptetonbononptott otganoatottsaothotoedtomal aIspactal tates lNePsOn 132 122 PDMI outoose lnnpton noonofI 01 ths otganaa tSc enempt stab tot Fedeta noonte tao PuPosps haun hhanaeadutna PtePedtng 12 noontha ID F slant Nato, oIC,ootaton 601001 Aoeaoeno popes no nopnsol sndle do,ngpoElshed ptnpedngneatest l2tnonthstlnodate ATotal No Copes P,nted Net Pesa SonI5467262275 SPaOCtcoatnn 1hal ea thtoooh Oealns Cattets Ntpot Vendots Coontet Dalpa2175 2252 2Mal hohscnpsons4h664h61d6 CTotal Pad C,colaton4913959290 OFteeosttEosonhhMalcattet otOthat Means hampton Contpltnentatoand Othe Fee CoPtes28062212 CTotalDatnEotonlhotnotC&DI5294761610 FCopesNoOst,Noted 1Ott Ce Use Left Ooet Unapononted Opo led alte Pt nI ny1 429653 2Rotons toot howl Agents28612 OTotailNotnot FF1 and2 Ptouldeooa help less ton shownn Al5467262275 11 lpetttothafthasoatomPntsntadehhmPabOoeatpoottePt andoomplete CARLO PInFELCY Puhltahat fuselage structure building board cement contoured section place Place waxed paper top longerons back #D bulkhead pin upper sections bulkheads place Plank top fuse lage back cockpit headrest build adjustable unit indi cated cement stabilizer positive angle degree Leading edge up about 1/16 Build up vertical fin laminated leading edge airplane spent much time its back during asphalt takeoff attempts upper fin strengthened repalred several times Make tail-skid movable rudder control install small tall-wheel expect operate off hard-surface runway scale landing gear shock system works well made per plan Install englne radial mount suit engine Mine tipped 20 degrees right position working engine cylinder between two dummy cylinders scale engine 40-size series 71 K & B engine provides plenty power 115 Zinger prop fuel tank installed directly behind firewall left side fuselage after aileron rudder servos mounted Servos installed directly behind firewall under alongside 8-ounce tank receiver behind bulkhead #A battery pack located will balance aircraft Mine behind receiver extra weight adjustable stabilizer may have farther forward Rubber bands hold battery receiver place plenty foam wrap Lou Proctors streamlined wire #2 turnbuckles used rigging upper rigging wings attaches piece music wire across fuselage longerons Rig degree two wash-out both wings will some flexing torque rods ailerons no amount sloppiness should allowed 1/16 music wire pushrod supported center used elevator control Cables small stiff spring used rudder control Rudder bellcrank length critical link servo should just outside cable attachment point top fuselage hatch held place back internal rubber band front modified Dzues fastener Wheel pants could made hollowed balsa blocks However used two layers fiberglass cloth plywood frames allow pant halves screwed together cowling could made up balsa rings prefer two layers fiberglass cloth aluminum ring about 1/16 X 1/2 glassed back Drill screw holes through attachment stand-off fittings fastened firewall model covered natural Coverite except rudder stabilizer elevators covered Silkspan Several light coats clear Sig dope applied sanded Sig Cub yellow dope sprayed three coats lightly sanded weave cloth should still visible finished except metal covering simulated planking Scalloping numbers masked off sprayed Sig black dope Use 1/16-in wide red striping tape separation black yellow scalloping around numbers small lettering generally black except Springfield Air Racing Association Inc Powered P&W Wasp Hartahorn Steel Tie Rods Supersportster Aircraft Products Wheels & Brakes red Also red edging around Gee Bee rudder N77V Unless good small lettering striping unlikely will come up 108 Model Aviation MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS
Edition: Model Aviation - 1979/12
Page Numbers: 10, 11, 12, 13, 14, 15, 16, 17, 106, 108, 110
NO OCR TEXT NO OCR TEXT THE history aviation has produced few men enough courage gamble convictions Wright Brothers Glenn Curt iss Tony Fokker Clyde Cessna Giuseppe Bel lanca Don Douglas Walt Beech Jack Northrop some Granville Brothers Gee Bees remarkable aircraft con tributed greatly advancement aerody namic engineering Granvilles innovations used other aircraft years Yet news media jumped misfortunes befalling built aircraft blowing mishap completely out proportion actuality expanding news accidents catas trophy contributed downfall Granville Brothers Aircraft Company crashes involving Gee Bee aircraft human fail ure pilot error contributed mech anical failures secondary factor Gee Bees aircraft originally designed flown good airplanes Only modified greater horsepower fuel tankage did get trouble stability problems changes authorized manufac turer Most people under impression Doolittle successfully fly Gee Bee R1 flew time Thompson Trophy race fact R1 racer test-flown number times Russell Boardman before Doolittle saw airplanes Doolittle flew R1 several times before Thompson race qualifying racer dedicated scale man 40powered model exact scale version real City Spring fieldeven aerodynamic set-up Granger Williams Shell event trying establish worlds speed record Other pilots flew Gee Bee racers included Lee Gehlbach Russell Thaw Roy Minor Jimmy Haislip Lee Gehlback test flew R2 flew both Bendix Thompson races first aircraft produced Granvilles 1929 small two place biplane side-byside seating Powered 60-hp Velie M5 engine unusual feature adjustable wing flap could changed flight various angles allowed unusually low landing speed still gave good flying perfor mance factory set up company turned building model Biplanes Early 1930 American Flying Derby organized sponsored American Cirrus Engines Inc planes entered would powered Cirrus engines sold sponsors Cirrus engine four-cylinder in-line manufactured Michigan under English patents Springfield Granvilles made plans enter new plane American Derby An engineer Bob Hail joined Granvilles 1929 rest Granville organization produced first Gee Bee Sportster Model X features airplane carried through rest Gee Bee Sportsters racers through 1934 Bob Hall later turn design talents World War 2 Grumman Aircraft Wing span Model X 25 feetsingle-place opencockpit monoplane powered inverted Cirrus engine developing 95 hp at2 100 rpm wing shape same used suc ceeding Gee Bee designs through 1933 Pilot new creation Lowell Bayles flown everything Jennies Ford trimotors After flying derby impressed performance little sportster bought own use fast safe dependable sport plane Production models Gee Bee X fitted engines Two GeeBees two pilots Right Granger Williams Z article Bill Turner GeeBee Miss Los Angeles especially builtboth now flying Most important factor excellent performance Grangers Z its light weight Its struc ture based closely upon Vein Clements CL planVein specialized GeeBees some 25 years side bottom views basic fuselage show root fairings tailor fuselage including 95hp Cirrus model B 95hp Menasco model C 125-hp Menasco model D 135-hp Ranger Model F Radial engined versions powered 1 10hp Warner model E new two-place Senior Sportater Gee Bee designated model Y larger D model 20% designed 210-hp Kinner 215hp Lycoming 240-hp Wright J6 Pratt & Whitney Wasp Jr 300 hp / outside GeeBee exactly like its big counterpart Lowell Bayles looked inside saw nothing like thisl Servos rud der aileron installed before 8oz tank located under neath side tank immediately behind firewall ciuser view uwe outaims uewne seiu -evident Uoi irue tie rod runs woss cockpit attach points wing wires Front view plan makes clear location fourservos Foamwrapped battery pack appears extreme right photo une psesure truy worth 1000 words Especially interesting treat ment landing gear arrangement functional scale rigging wires Proctor streamlined wire No 2 turnbuckles brace wing take sideloads gear Reaay-so-ve-coverea L evokes special feeling real aircraft K&B 40-sized series 71 tipped 20 degrees position working cyl inder between two dummy cylinders Plenty power Zinger 11-5 TATONE ENGINE MOUNT K 8 B 40 ENGINE AT 400 TILT PLASTIC WASP 9 CYL ENGINE FROM WILLIAMS BROS 3/32 X 3/8 BALSA PLANKING FORMER V16 WIRE TIE ROD ON TOP OF FORMER FORMER B B-i BALSA SHEET COWL RINGS OR FORMED FIBERGLASS 3/16 PLYWOOD FIREWALL BETWEEN LOUVERED CcYAL AND RADIAL ENGINE MOUNT ___7 A74fA CAL ~ GLIOC LOTf k77 7-9 A/C 1/8 BRASS TUBING INSIDE SHOCK SPRING METAL COVER GAP UNDER COWLING REAR RIM FOR AIR COOLING N N N BALSA BLOCKS 3/32 WIRE MAINS IAMS BROS 143 SMOOTH WHEELS 3/32 WIRE MAINMETAL PI\OT FORK STRUTBRACKETTURNBUCKLES ANCHOR 10 1/32 WIRE FIBERGLASS FNrS OR BALSA LAMiNATES 1/8 BALSA FORMS UNDER REMOVABLE HATCH AILERON BELLCRANKS FORMER D 1/16 X 3/16 BALSA FOR ALL STRINGERS FORMER E 3/16 SQ SPRUCE FIN POST 3/32 PLYVJCOD PROCTOR STREAMLINE WIRES / 1/16 SHEET BALSA CORE IN RUDDER AND STABILIZER 1/8 DOWEL TORQUE TUBES 1/32 PLY RUDDER HORNS 1/16 X 1/8 BALSA EDGE LAMINATES N WIRE BRACED STRUT TO SPAR BIKE SPOKE SCREW JACK ON 3/32 PLYWCOD PLATFORM ELEVATOR 8ELLCRANK ---- TAIL SKID WITH WHEEL AT BASE 1/16 PLYWOOD FILLET T E 1/8 X 1/2 BALSA TRAILING EDGES AILERON ROD DISCONNECT AILERON TORQUE WIRE 1/4 BALSA AILERON SPAR METAL CLIP ON SPAR FOR WING RIGGING WIRES 3/16 TRIANGULAR FILLETS 1/16 BALSA ALL WING RIBS I/8X 1/4 SPRUCE SPARS FRONT AND REAR 1/16 BALSA L E COVER TOP AND BOTTOM 1/8 PLYWDD WING TIPS I/16X 3/16 BALSA TIP BOW LAMINATED 1931 Bob Hall Zantford Granville designed new plane first strictly racing model model Z Rolled out shop August 22 1931 Gee Bee Z constructed using some duplicate modified parts used building model Ys Powered loaned Pratt & Whitney Wasp Jr engine used Laird Solution won 1930 Thompson Race basic fuselage structure welded chrome-moly tubing wing built wood using M6 airfoil cockpit cover ancestor bubble canopy transparent section fastened removable section top fuselage cover placed after pilot seated held position quick releas able fasteners inside cockpit Aircraft Product wheels brakes actuated full back position control stick directional brake control rudder pedals first day 1933 National Air Races Bob Hall won 25mile race Menasco-powered D model Zantford Granville fourth 30mile race flying Warnerpowered model E Mary Haislip Menasco powered D Maude Tait Warnerpowered E won second third two womens events Lowell Bayles won Shell qualifying event Z 26734 mph new record Bob Hall second 21386 model Y Rudder belicrank spring-loaded cables running aft rudder pushrod extreme left crank Passing over two pushrods engage horns attached aileron torque tubeplan detail shows uncommonly simple coupling arrangement inner torque tube wings Hubber-scale builders will appreciate photo looking aft stringers permit almost shell-like structure weight impor tant can no business basic boxes other popular crudi ties Note bushed pushrod guide also provides stiffening way wasand clearly dont have take word Tile shock strut covers thin aluminum Front view plan shows cross sections both built-up balsa boots Pants can hollowed balsa blocks Granger made two halves using plywood frames two layers glass clothhalves screw together Gear can permanently fixed detachabledetails text help detailed photo plans can duplicate actual strut arrangement real aircraftnote shock-absorbing coil spring Jr cylinders configured just two rings very simple arrangement designer advises loca tion center gravity must behind 18% wing chord FULL SIZE PLANS AVAILABLE SEE PAGE 128 Bayles won 50mile race Z Bob Hall second placeuntil hit water tower forced land two feet wing tip gone model Y Bob Hall won General Tire Trophy Z won mixed free-for-all race also Z Maude Tait won Aerol Trophy Y Lowell Bayles won Thompson Trophy race 23623 mph Z Bob Hall fourth Y too bad first year Gee Bee racing group November 1931 750-hp Pratt & Whit ney Wasp Sr engine installed Gee Bee Z attempt set new speed record Several tries made during November early December set record propeller engine problems kept completing required four passes over course December 5 Bayles flew Z about 1000 feet five miles course went dive gain speed As levelled out roared through course first pass airplane suddenly dipped level flight pulled up sharply right wing folded up Z rolled twice right before crashed exploded physical evidence scene motion pictures crash inspected frame frame leading conclusion loose gas cap started trouble Apparently cap flew off striking cockpit cover canopy shattered inward blinding Bayles causing him lose control Designer Bob Hall said Gee Bee sensitive longitudinally added stress dip pull-up caused right wing fall Speed time estimated excess 325 mph first unfortunate series mishaps exploited news papers hack writers seeking capitalize sensationalism Much information adapted book Gee Bee Story Charles Man drake additional information correc tions Bob Granville Building Model Gee Bee i tired same old quickly-built easy-flying muchmodified scale models never look like original airplaneyou ready take chal lenge exact scale model unusual airplane choose Gee Bee racer because intrigues everyone experts tells wont fly serious enough make exact scale say welcome exclusive group model builders fliers other hand people think scale models will fly unless redesign bigger tails dif ferent airfoils shorter landing gear some other abortive change because know original designer forget buddy talk same language afraid challenge exact scale model presents lousy pilot model Gee Bee Z exact scale proportions aerodynamic layout flying stability equal good high per fonnance model has flown will Continued page 106 ltttj1 . - - -t I .. j 77 j I -t I/ /\ Vh vrr1v II -~1 -A -~2 Painstaking attention engine c pro duced life-like P&W Particularly note Tamitiar trademark location case shaft well pushrod attachment case Plans show balsa ring cowl construction Granger used two-layer fiberglass shell aluminum ring back Granger Z recommends wheel land ings warns against 3-pointers Describes mod ification tires enabled ship take off concrete runways problem begin ning comments proper handling during roll-out after touchdown GeeBee lore fly Fast Combat now am wonder ing could pass along either Mr Hempel Mr Upton someone has experience jets What primarily need know current designs Jet Speed planes could get plans Also recommended Dyna Jet Raven Assuming arent kept secret what some reworking processes done jets make faster other cutting off air nozzle enlarging holes flowiector Dyna Jet Does Curtiss Dyna still make Dyna Jet Any information may able supply will greatly appreci ated Thank very much Cam Dix Ontario Canada have put Mr Dix touch Mike Langlois did wizard article CL Super Burp December 1978 issue MA publishes occasional state-of-the-art articles ob scure types models competition just such purposesto get data down somewhere long-lasting refer ences now possible bellowing sounds wafting across Cam s ho metown Don Mills entire pro vince Ontario yes under stand Curtiss still has Dyna Jets Al discount advertisers has offered item recently Likes Half-A Scale Just few lines let know think choice construction pro jects excellent particularly im pressed Wildcat Bowers SruH have around B-25 March issue would like encourage publish addi tional Frank Baker multisthat A-26 looks very interesting I C Sloane East Hanover NJ Alas JC dont weve got works Hurst cooking up Lockheed Air Express Gee Bee Z/Williams continued page 17 fly itself has no bad habits Landings best made wheel landings try three-point Quick rudder action roll-out necessary avoid ground ioops asphalt other hard surface tail-wheel comes contact small tail-wheel built end tailskid use hard-surfaced runways unable fly airplane off asphalt concrete until some special tires made grinding groove regular tires snapping 0 ring made polypropelene done allowing tires slide no takeoff problems experienced Full backstick required keep tail down push throttle open ease stick forward speed increases ship comes off little back stick 30 50 feet depending upon wind 106 Model Aviation Please send _______________ copies new 5th edition Radio Control Buyers Guide Enclosed $825 copy ordered $725 retail plus $100 postage handling City State ZIP _________________________________________ Return RC Buyers Guide Clifton House Clifton VA 22024 LOOKING FOR A BETTER FIELD BOX VIM RflY Look Aerotrend best market Tested approved reccomended RCM FM MAN magazines Flyin Box right made super durable fiberglas shipped completely assembled stor age bins flip-up plane supports folding legs wood boxesleft offer similar range features low low price Both types offered deluxe models built-In power panels other access ories SEND SA&E FOR FREE CATALOG SHOWING ALL OUR FINE PRODUCTS ST PROSPECT STREET AEROTREND PRODUCTS EAVEN CT 06515 2 $8995 Assembled condition Special tires necessary dirt grass important thing remember about model allow center gravity CG get behind recommended 18 percent wing chord back forward wing spar full-size Gee Bee racers lost 1935 CG limits ignored inexperienced pilot modified aircraft incorporate larger fuel tanks cross-country Bendix race Unfortunately accident blamed design airplane news media feel competent test fly model Gee Bee find good experi enced scale model flier help Believe expert pattern fliers qualified fly airplane Construction I started cutting out fuse lage bulkheads Below top longeron bulkheads made 3/32 sheet balsa 1/64 plywood glued side Temporarily glue X strip wood sides bulkheads top hold being glued top basswood longerons Pin building board carefully align square some other right-angle tool lower half fuselage built upside down board Glue bottom center basswood stringer place clamp pin bulkheads Recheck alignment Glue couple diagonal braces X basswood top bulkhead #A bottom bulkhead #D Now can lay rest medium-hard balsa stringers around fuse lage Fill between stringers 3/32 balsa strips indicated planking Let unit set day two Cut wing ribs out using patterns shown change alrfoil shape thickness racing plane trainer Assemble ribs spars proper order position Cement leading trailing edges place laminate wing tips basswood best results Cut 1/16 sheet balsa leading edge planking trim fit well Cement place sand leading edge proper shape Install aileron hinges torque rods plug-in dowels flying wire fittings landing gear will removable bend shape sewn bolted attachment fasten bulkheads glue ply wood root ribs place Make sure both correct angle want removable landing gear did make up angle brackets aluminum drill gear screw holes Bolt bulkheads bolt root ribs shaped wing-root fairings front bulkhead back made balsa block hollowed out 3/32 balsa planking Cracks low spots filled Maglc Patch similar materiaL Make front contoured section tween 3/16 plywood firewall bulkhead #A out balsa blocks thick sheet stock Hollow out about kness Remove STATEMENT OF OWNERSHIP MANAGEMENT ANO CIRCULATION Pq,dlt 399 SC 1681 1Tttaot PuOIoaton MODEL AVIATION Pobhcaton No 793d 2Date Flng Seotembet 14 1979 3FteooettooOtlssoe Motttflln No 01 Isaac PoEIofled Attnaalo 12 R Annual Sobsonptton Ptce $1600 4 Locatonotlnnossnottceol poblcasonlsteetotvcountostateandZlP codel Pttttetsl baN Ftseenth NI NW Puashttaton DC 2000N N Lopattolt Dl headDarets genetol bosness ol1ces PODISflPt pttttetsl GIN Ffteetth Dl NW WashngtOn DC 2DOON 6 Nattles Potnelete adanesses 01 Puhltsflet Edtpt Manaattg hdtot Pobnshe Cal S Wheeln 6th FIteentflht NWPlaahinglonDC2DSTN PatIo Wllatt 4 Wnte 815 Ftteenth Nt NW WashndtDn DC 20005 Manaona Edto NONE 7 Opane Apadetnto 01 Model Oeonaotcs St N Flteetth Nt asflngtot DC 2OGGN Known Nondholdets tnontaaaees Othet secuttp holdets 0othflg ot hold nul%otttoneottotalantoontotbondsmottgagesot otnelsacottles NONE 9 Fotcotnptetonbononptott otganoatottsaothotoedtomal aIspactal tates lNePsOn 132 122 PDMI outoose lnnpton noonofI 01 ths otganaa tSc enempt stab tot Fedeta noonte tao PuPosps haun hhanaeadutna PtePedtng 12 noontha ID F slant Nato, oIC,ootaton 601001 Aoeaoeno popes no nopnsol sndle do,ngpoElshed ptnpedngneatest l2tnonthstlnodate ATotal No Copes P,nted Net Pesa SonI5467262275 SPaOCtcoatnn 1hal ea thtoooh Oealns Cattets Ntpot Vendots Coontet Dalpa2175 2252 2Mal hohscnpsons4h664h61d6 CTotal Pad C,colaton4913959290 OFteeosttEosonhhMalcattet otOthat Means hampton Contpltnentatoand Othe Fee CoPtes28062212 CTotalDatnEotonlhotnotC&DI5294761610 FCopesNoOst,Noted 1Ott Ce Use Left Ooet Unapononted Opo led alte Pt nI ny1 429653 2Rotons toot howl Agents28612 OTotailNotnot FF1 and2 Ptouldeooa help less ton shownn Al5467262275 11 lpetttothafthasoatomPntsntadehhmPabOoeatpoottePt andoomplete CARLO PInFELCY Puhltahat fuselage structure building board cement contoured section place Place waxed paper top longerons back #D bulkhead pin upper sections bulkheads place Plank top fuse lage back cockpit headrest build adjustable unit indi cated cement stabilizer positive angle degree Leading edge up about 1/16 Build up vertical fin laminated leading edge airplane spent much time its back during asphalt takeoff attempts upper fin strengthened repalred several times Make tail-skid movable rudder control install small tall-wheel expect operate off hard-surface runway scale landing gear shock system works well made per plan Install englne radial mount suit engine Mine tipped 20 degrees right position working engine cylinder between two dummy cylinders scale engine 40-size series 71 K & B engine provides plenty power 115 Zinger prop fuel tank installed directly behind firewall left side fuselage after aileron rudder servos mounted Servos installed directly behind firewall under alongside 8-ounce tank receiver behind bulkhead #A battery pack located will balance aircraft Mine behind receiver extra weight adjustable stabilizer may have farther forward Rubber bands hold battery receiver place plenty foam wrap Lou Proctors streamlined wire #2 turnbuckles used rigging upper rigging wings attaches piece music wire across fuselage longerons Rig degree two wash-out both wings will some flexing torque rods ailerons no amount sloppiness should allowed 1/16 music wire pushrod supported center used elevator control Cables small stiff spring used rudder control Rudder bellcrank length critical link servo should just outside cable attachment point top fuselage hatch held place back internal rubber band front modified Dzues fastener Wheel pants could made hollowed balsa blocks However used two layers fiberglass cloth plywood frames allow pant halves screwed together cowling could made up balsa rings prefer two layers fiberglass cloth aluminum ring about 1/16 X 1/2 glassed back Drill screw holes through attachment stand-off fittings fastened firewall model covered natural Coverite except rudder stabilizer elevators covered Silkspan Several light coats clear Sig dope applied sanded Sig Cub yellow dope sprayed three coats lightly sanded weave cloth should still visible finished except metal covering simulated planking Scalloping numbers masked off sprayed Sig black dope Use 1/16-in wide red striping tape separation black yellow scalloping around numbers small lettering generally black except Springfield Air Racing Association Inc Powered P&W Wasp Hartahorn Steel Tie Rods Supersportster Aircraft Products Wheels & Brakes red Also red edging around Gee Bee rudder N77V Unless good small lettering striping unlikely will come up 108 Model Aviation MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS
Edition: Model Aviation - 1979/12
Page Numbers: 10, 11, 12, 13, 14, 15, 16, 17, 106, 108, 110
NO OCR TEXT NO OCR TEXT THE history aviation has produced few men enough courage gamble convictions Wright Brothers Glenn Curt iss Tony Fokker Clyde Cessna Giuseppe Bel lanca Don Douglas Walt Beech Jack Northrop some Granville Brothers Gee Bees remarkable aircraft con tributed greatly advancement aerody namic engineering Granvilles innovations used other aircraft years Yet news media jumped misfortunes befalling built aircraft blowing mishap completely out proportion actuality expanding news accidents catas trophy contributed downfall Granville Brothers Aircraft Company crashes involving Gee Bee aircraft human fail ure pilot error contributed mech anical failures secondary factor Gee Bees aircraft originally designed flown good airplanes Only modified greater horsepower fuel tankage did get trouble stability problems changes authorized manufac turer Most people under impression Doolittle successfully fly Gee Bee R1 flew time Thompson Trophy race fact R1 racer test-flown number times Russell Boardman before Doolittle saw airplanes Doolittle flew R1 several times before Thompson race qualifying racer dedicated scale man 40powered model exact scale version real City Spring fieldeven aerodynamic set-up Granger Williams Shell event trying establish worlds speed record Other pilots flew Gee Bee racers included Lee Gehlbach Russell Thaw Roy Minor Jimmy Haislip Lee Gehlback test flew R2 flew both Bendix Thompson races first aircraft produced Granvilles 1929 small two place biplane side-byside seating Powered 60-hp Velie M5 engine unusual feature adjustable wing flap could changed flight various angles allowed unusually low landing speed still gave good flying perfor mance factory set up company turned building model Biplanes Early 1930 American Flying Derby organized sponsored American Cirrus Engines Inc planes entered would powered Cirrus engines sold sponsors Cirrus engine four-cylinder in-line manufactured Michigan under English patents Springfield Granvilles made plans enter new plane American Derby An engineer Bob Hail joined Granvilles 1929 rest Granville organization produced first Gee Bee Sportster Model X features airplane carried through rest Gee Bee Sportsters racers through 1934 Bob Hall later turn design talents World War 2 Grumman Aircraft Wing span Model X 25 feetsingle-place opencockpit monoplane powered inverted Cirrus engine developing 95 hp at2 100 rpm wing shape same used suc ceeding Gee Bee designs through 1933 Pilot new creation Lowell Bayles flown everything Jennies Ford trimotors After flying derby impressed performance little sportster bought own use fast safe dependable sport plane Production models Gee Bee X fitted engines Two GeeBees two pilots Right Granger Williams Z article Bill Turner GeeBee Miss Los Angeles especially builtboth now flying Most important factor excellent performance Grangers Z its light weight Its struc ture based closely upon Vein Clements CL planVein specialized GeeBees some 25 years side bottom views basic fuselage show root fairings tailor fuselage including 95hp Cirrus model B 95hp Menasco model C 125-hp Menasco model D 135-hp Ranger Model F Radial engined versions powered 1 10hp Warner model E new two-place Senior Sportater Gee Bee designated model Y larger D model 20% designed 210-hp Kinner 215hp Lycoming 240-hp Wright J6 Pratt & Whitney Wasp Jr 300 hp / outside GeeBee exactly like its big counterpart Lowell Bayles looked inside saw nothing like thisl Servos rud der aileron installed before 8oz tank located under neath side tank immediately behind firewall ciuser view uwe outaims uewne seiu -evident Uoi irue tie rod runs woss cockpit attach points wing wires Front view plan makes clear location fourservos Foamwrapped battery pack appears extreme right photo une psesure truy worth 1000 words Especially interesting treat ment landing gear arrangement functional scale rigging wires Proctor streamlined wire No 2 turnbuckles brace wing take sideloads gear Reaay-so-ve-coverea L evokes special feeling real aircraft K&B 40-sized series 71 tipped 20 degrees position working cyl inder between two dummy cylinders Plenty power Zinger 11-5 TATONE ENGINE MOUNT K 8 B 40 ENGINE AT 400 TILT PLASTIC WASP 9 CYL ENGINE FROM WILLIAMS BROS 3/32 X 3/8 BALSA PLANKING FORMER V16 WIRE TIE ROD ON TOP OF FORMER FORMER B B-i BALSA SHEET COWL RINGS OR FORMED FIBERGLASS 3/16 PLYWOOD FIREWALL BETWEEN LOUVERED CcYAL AND RADIAL ENGINE MOUNT ___7 A74fA CAL ~ GLIOC LOTf k77 7-9 A/C 1/8 BRASS TUBING INSIDE SHOCK SPRING METAL COVER GAP UNDER COWLING REAR RIM FOR AIR COOLING N N N BALSA BLOCKS 3/32 WIRE MAINS IAMS BROS 143 SMOOTH WHEELS 3/32 WIRE MAINMETAL PI\OT FORK STRUTBRACKETTURNBUCKLES ANCHOR 10 1/32 WIRE FIBERGLASS FNrS OR BALSA LAMiNATES 1/8 BALSA FORMS UNDER REMOVABLE HATCH AILERON BELLCRANKS FORMER D 1/16 X 3/16 BALSA FOR ALL STRINGERS FORMER E 3/16 SQ SPRUCE FIN POST 3/32 PLYVJCOD PROCTOR STREAMLINE WIRES / 1/16 SHEET BALSA CORE IN RUDDER AND STABILIZER 1/8 DOWEL TORQUE TUBES 1/32 PLY RUDDER HORNS 1/16 X 1/8 BALSA EDGE LAMINATES N WIRE BRACED STRUT TO SPAR BIKE SPOKE SCREW JACK ON 3/32 PLYWCOD PLATFORM ELEVATOR 8ELLCRANK ---- TAIL SKID WITH WHEEL AT BASE 1/16 PLYWOOD FILLET T E 1/8 X 1/2 BALSA TRAILING EDGES AILERON ROD DISCONNECT AILERON TORQUE WIRE 1/4 BALSA AILERON SPAR METAL CLIP ON SPAR FOR WING RIGGING WIRES 3/16 TRIANGULAR FILLETS 1/16 BALSA ALL WING RIBS I/8X 1/4 SPRUCE SPARS FRONT AND REAR 1/16 BALSA L E COVER TOP AND BOTTOM 1/8 PLYWDD WING TIPS I/16X 3/16 BALSA TIP BOW LAMINATED 1931 Bob Hall Zantford Granville designed new plane first strictly racing model model Z Rolled out shop August 22 1931 Gee Bee Z constructed using some duplicate modified parts used building model Ys Powered loaned Pratt & Whitney Wasp Jr engine used Laird Solution won 1930 Thompson Race basic fuselage structure welded chrome-moly tubing wing built wood using M6 airfoil cockpit cover ancestor bubble canopy transparent section fastened removable section top fuselage cover placed after pilot seated held position quick releas able fasteners inside cockpit Aircraft Product wheels brakes actuated full back position control stick directional brake control rudder pedals first day 1933 National Air Races Bob Hall won 25mile race Menasco-powered D model Zantford Granville fourth 30mile race flying Warnerpowered model E Mary Haislip Menasco powered D Maude Tait Warnerpowered E won second third two womens events Lowell Bayles won Shell qualifying event Z 26734 mph new record Bob Hall second 21386 model Y Rudder belicrank spring-loaded cables running aft rudder pushrod extreme left crank Passing over two pushrods engage horns attached aileron torque tubeplan detail shows uncommonly simple coupling arrangement inner torque tube wings Hubber-scale builders will appreciate photo looking aft stringers permit almost shell-like structure weight impor tant can no business basic boxes other popular crudi ties Note bushed pushrod guide also provides stiffening way wasand clearly dont have take word Tile shock strut covers thin aluminum Front view plan shows cross sections both built-up balsa boots Pants can hollowed balsa blocks Granger made two halves using plywood frames two layers glass clothhalves screw together Gear can permanently fixed detachabledetails text help detailed photo plans can duplicate actual strut arrangement real aircraftnote shock-absorbing coil spring Jr cylinders configured just two rings very simple arrangement designer advises loca tion center gravity must behind 18% wing chord FULL SIZE PLANS AVAILABLE SEE PAGE 128 Bayles won 50mile race Z Bob Hall second placeuntil hit water tower forced land two feet wing tip gone model Y Bob Hall won General Tire Trophy Z won mixed free-for-all race also Z Maude Tait won Aerol Trophy Y Lowell Bayles won Thompson Trophy race 23623 mph Z Bob Hall fourth Y too bad first year Gee Bee racing group November 1931 750-hp Pratt & Whit ney Wasp Sr engine installed Gee Bee Z attempt set new speed record Several tries made during November early December set record propeller engine problems kept completing required four passes over course December 5 Bayles flew Z about 1000 feet five miles course went dive gain speed As levelled out roared through course first pass airplane suddenly dipped level flight pulled up sharply right wing folded up Z rolled twice right before crashed exploded physical evidence scene motion pictures crash inspected frame frame leading conclusion loose gas cap started trouble Apparently cap flew off striking cockpit cover canopy shattered inward blinding Bayles causing him lose control Designer Bob Hall said Gee Bee sensitive longitudinally added stress dip pull-up caused right wing fall Speed time estimated excess 325 mph first unfortunate series mishaps exploited news papers hack writers seeking capitalize sensationalism Much information adapted book Gee Bee Story Charles Man drake additional information correc tions Bob Granville Building Model Gee Bee i tired same old quickly-built easy-flying muchmodified scale models never look like original airplaneyou ready take chal lenge exact scale model unusual airplane choose Gee Bee racer because intrigues everyone experts tells wont fly serious enough make exact scale say welcome exclusive group model builders fliers other hand people think scale models will fly unless redesign bigger tails dif ferent airfoils shorter landing gear some other abortive change because know original designer forget buddy talk same language afraid challenge exact scale model presents lousy pilot model Gee Bee Z exact scale proportions aerodynamic layout flying stability equal good high per fonnance model has flown will Continued page 106 ltttj1 . - - -t I .. j 77 j I -t I/ /\ Vh vrr1v II -~1 -A -~2 Painstaking attention engine c pro duced life-like P&W Particularly note Tamitiar trademark location case shaft well pushrod attachment case Plans show balsa ring cowl construction Granger used two-layer fiberglass shell aluminum ring back Granger Z recommends wheel land ings warns against 3-pointers Describes mod ification tires enabled ship take off concrete runways problem begin ning comments proper handling during roll-out after touchdown GeeBee lore fly Fast Combat now am wonder ing could pass along either Mr Hempel Mr Upton someone has experience jets What primarily need know current designs Jet Speed planes could get plans Also recommended Dyna Jet Raven Assuming arent kept secret what some reworking processes done jets make faster other cutting off air nozzle enlarging holes flowiector Dyna Jet Does Curtiss Dyna still make Dyna Jet Any information may able supply will greatly appreci ated Thank very much Cam Dix Ontario Canada have put Mr Dix touch Mike Langlois did wizard article CL Super Burp December 1978 issue MA publishes occasional state-of-the-art articles ob scure types models competition just such purposesto get data down somewhere long-lasting refer ences now possible bellowing sounds wafting across Cam s ho metown Don Mills entire pro vince Ontario yes under stand Curtiss still has Dyna Jets Al discount advertisers has offered item recently Likes Half-A Scale Just few lines let know think choice construction pro jects excellent particularly im pressed Wildcat Bowers SruH have around B-25 March issue would like encourage publish addi tional Frank Baker multisthat A-26 looks very interesting I C Sloane East Hanover NJ Alas JC dont weve got works Hurst cooking up Lockheed Air Express Gee Bee Z/Williams continued page 17 fly itself has no bad habits Landings best made wheel landings try three-point Quick rudder action roll-out necessary avoid ground ioops asphalt other hard surface tail-wheel comes contact small tail-wheel built end tailskid use hard-surfaced runways unable fly airplane off asphalt concrete until some special tires made grinding groove regular tires snapping 0 ring made polypropelene done allowing tires slide no takeoff problems experienced Full backstick required keep tail down push throttle open ease stick forward speed increases ship comes off little back stick 30 50 feet depending upon wind 106 Model Aviation Please send _______________ copies new 5th edition Radio Control Buyers Guide Enclosed $825 copy ordered $725 retail plus $100 postage handling City State ZIP _________________________________________ Return RC Buyers Guide Clifton House Clifton VA 22024 LOOKING FOR A BETTER FIELD BOX VIM RflY Look Aerotrend best market Tested approved reccomended RCM FM MAN magazines Flyin Box right made super durable fiberglas shipped completely assembled stor age bins flip-up plane supports folding legs wood boxesleft offer similar range features low low price Both types offered deluxe models built-In power panels other access ories SEND SA&E FOR FREE CATALOG SHOWING ALL OUR FINE PRODUCTS ST PROSPECT STREET AEROTREND PRODUCTS EAVEN CT 06515 2 $8995 Assembled condition Special tires necessary dirt grass important thing remember about model allow center gravity CG get behind recommended 18 percent wing chord back forward wing spar full-size Gee Bee racers lost 1935 CG limits ignored inexperienced pilot modified aircraft incorporate larger fuel tanks cross-country Bendix race Unfortunately accident blamed design airplane news media feel competent test fly model Gee Bee find good experi enced scale model flier help Believe expert pattern fliers qualified fly airplane Construction I started cutting out fuse lage bulkheads Below top longeron bulkheads made 3/32 sheet balsa 1/64 plywood glued side Temporarily glue X strip wood sides bulkheads top hold being glued top basswood longerons Pin building board carefully align square some other right-angle tool lower half fuselage built upside down board Glue bottom center basswood stringer place clamp pin bulkheads Recheck alignment Glue couple diagonal braces X basswood top bulkhead #A bottom bulkhead #D Now can lay rest medium-hard balsa stringers around fuse lage Fill between stringers 3/32 balsa strips indicated planking Let unit set day two Cut wing ribs out using patterns shown change alrfoil shape thickness racing plane trainer Assemble ribs spars proper order position Cement leading trailing edges place laminate wing tips basswood best results Cut 1/16 sheet balsa leading edge planking trim fit well Cement place sand leading edge proper shape Install aileron hinges torque rods plug-in dowels flying wire fittings landing gear will removable bend shape sewn bolted attachment fasten bulkheads glue ply wood root ribs place Make sure both correct angle want removable landing gear did make up angle brackets aluminum drill gear screw holes Bolt bulkheads bolt root ribs shaped wing-root fairings front bulkhead back made balsa block hollowed out 3/32 balsa planking Cracks low spots filled Maglc Patch similar materiaL Make front contoured section tween 3/16 plywood firewall bulkhead #A out balsa blocks thick sheet stock Hollow out about kness Remove STATEMENT OF OWNERSHIP MANAGEMENT ANO CIRCULATION Pq,dlt 399 SC 1681 1Tttaot PuOIoaton MODEL AVIATION Pobhcaton No 793d 2Date Flng Seotembet 14 1979 3FteooettooOtlssoe Motttflln No 01 Isaac PoEIofled Attnaalo 12 R Annual Sobsonptton Ptce $1600 4 Locatonotlnnossnottceol poblcasonlsteetotvcountostateandZlP codel Pttttetsl baN Ftseenth NI NW Puashttaton DC 2000N N Lopattolt Dl headDarets genetol bosness ol1ces PODISflPt pttttetsl GIN Ffteetth Dl NW WashngtOn DC 2DOON 6 Nattles Potnelete adanesses 01 Puhltsflet Edtpt Manaattg hdtot Pobnshe Cal S Wheeln 6th FIteentflht NWPlaahinglonDC2DSTN PatIo Wllatt 4 Wnte 815 Ftteenth Nt NW WashndtDn DC 20005 Manaona Edto NONE 7 Opane Apadetnto 01 Model Oeonaotcs St N Flteetth Nt asflngtot DC 2OGGN Known Nondholdets tnontaaaees Othet secuttp holdets 0othflg ot hold nul%otttoneottotalantoontotbondsmottgagesot otnelsacottles NONE 9 Fotcotnptetonbononptott otganoatottsaothotoedtomal aIspactal tates lNePsOn 132 122 PDMI outoose lnnpton noonofI 01 ths otganaa tSc enempt stab tot Fedeta noonte tao PuPosps haun hhanaeadutna PtePedtng 12 noontha ID F slant Nato, oIC,ootaton 601001 Aoeaoeno popes no nopnsol sndle do,ngpoElshed ptnpedngneatest l2tnonthstlnodate ATotal No Copes P,nted Net Pesa SonI5467262275 SPaOCtcoatnn 1hal ea thtoooh Oealns Cattets Ntpot Vendots Coontet Dalpa2175 2252 2Mal hohscnpsons4h664h61d6 CTotal Pad C,colaton4913959290 OFteeosttEosonhhMalcattet otOthat Means hampton Contpltnentatoand Othe Fee CoPtes28062212 CTotalDatnEotonlhotnotC&DI5294761610 FCopesNoOst,Noted 1Ott Ce Use Left Ooet Unapononted Opo led alte Pt nI ny1 429653 2Rotons toot howl Agents28612 OTotailNotnot FF1 and2 Ptouldeooa help less ton shownn Al5467262275 11 lpetttothafthasoatomPntsntadehhmPabOoeatpoottePt andoomplete CARLO PInFELCY Puhltahat fuselage structure building board cement contoured section place Place waxed paper top longerons back #D bulkhead pin upper sections bulkheads place Plank top fuse lage back cockpit headrest build adjustable unit indi cated cement stabilizer positive angle degree Leading edge up about 1/16 Build up vertical fin laminated leading edge airplane spent much time its back during asphalt takeoff attempts upper fin strengthened repalred several times Make tail-skid movable rudder control install small tall-wheel expect operate off hard-surface runway scale landing gear shock system works well made per plan Install englne radial mount suit engine Mine tipped 20 degrees right position working engine cylinder between two dummy cylinders scale engine 40-size series 71 K & B engine provides plenty power 115 Zinger prop fuel tank installed directly behind firewall left side fuselage after aileron rudder servos mounted Servos installed directly behind firewall under alongside 8-ounce tank receiver behind bulkhead #A battery pack located will balance aircraft Mine behind receiver extra weight adjustable stabilizer may have farther forward Rubber bands hold battery receiver place plenty foam wrap Lou Proctors streamlined wire #2 turnbuckles used rigging upper rigging wings attaches piece music wire across fuselage longerons Rig degree two wash-out both wings will some flexing torque rods ailerons no amount sloppiness should allowed 1/16 music wire pushrod supported center used elevator control Cables small stiff spring used rudder control Rudder bellcrank length critical link servo should just outside cable attachment point top fuselage hatch held place back internal rubber band front modified Dzues fastener Wheel pants could made hollowed balsa blocks However used two layers fiberglass cloth plywood frames allow pant halves screwed together cowling could made up balsa rings prefer two layers fiberglass cloth aluminum ring about 1/16 X 1/2 glassed back Drill screw holes through attachment stand-off fittings fastened firewall model covered natural Coverite except rudder stabilizer elevators covered Silkspan Several light coats clear Sig dope applied sanded Sig Cub yellow dope sprayed three coats lightly sanded weave cloth should still visible finished except metal covering simulated planking Scalloping numbers masked off sprayed Sig black dope Use 1/16-in wide red striping tape separation black yellow scalloping around numbers small lettering generally black except Springfield Air Racing Association Inc Powered P&W Wasp Hartahorn Steel Tie Rods Supersportster Aircraft Products Wheels & Brakes red Also red edging around Gee Bee rudder N77V Unless good small lettering striping unlikely will come up 108 Model Aviation MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS