Ken Flaglor Gee Bee Model Y MY FIRST GEE BEE model built 1975 time have built three Model Ys two model too spent day Ken Model Y found best- have quarter-scale size saw beautiful machine photographing flying model ever piloted Since Ken Flaglors replica decided build aircraft inside out Im sure have pic After having covered history full-size plane month Americas premier Gee Bee model builder takes us through construction start finish four-channel radios 61 engine Part 2 2 EHenry Haffke Top After unfortunate crash its contest debut Haffke rebuilt latest Model V immaculate condition seen Except addition some minor detailing its ready competition again Above Left Hows documentation 1/5-size Gee Bee nes tles underneath Ken Flaglors replica 1985 Nats Above Right beautiful front end what gives model great part Its appeal As model lacks brace wires oil cooler scoop spark plugs ignition wires pitot tube aileron balances appropriate prop 34 Model Aviation ture nut bolt screw can seen taking aircraft apart AMA Nats first held Springfield MA flown three models various Gee Bees competition Springfield birthplace Gee Bees area childhood home well Nats scheduled again 1985 decided build two new Gee Bees competition Both would models Kens Model Y would Sport Scale other would ful ly detailed FAI Scale competition Using stack photos taken other research able produce good set scale drawings cut two sets parts put two fuselages together started cowls took over two months finish cowls dummy engines point realized would nev er get two models completed time Nats concentrated Sport Scale model spent some late nights getting ready good friend Sid Clement agreed test flying Sid master pilot has flown other Gee Bee creations didnt have Model Y quite finished Sunday before Nats Sid took out test flying installed Left The basic fuselage sides i/a-in balsa Note stab platform rear two sides plywood wing saddle doubler Right After first few bulkheads glued fuselage sides structure begins take Gee bees familiar barrel shape Left if youve got good eye may have noticed bulkhead shown plan forward cockpit early fuselage Right Top side stringers place bottom stringers will added after wing fuselage joined Left Details see include direction grain wing fillet bases rear fairing block wing hold down block fuel tank lo cation Right completed wing fairings built up blocks forward aft have 1/8-in planking over fairing bulkheads April 1988 35 Left After bottom stringers have glued place tall wheel installed shown Right Construction left wing panel has completed now ready final shaping sanding Note aluminum torque rod used actuate aileron Left After wing built aileron cut free trailing edge torque rod bolt will become servo crank sections nylon control horns embedded wood housings serve bearings Right center section contaIns required two aileron servos Left Tail surfaces built up starting %2 sheet balsa base adding %2 ribs edges both sides form realistic surface course simpler version could made cutting surfaces out 1A-ln sheet balsa Right completed landing gear assemblies main gear strut Note brass tube bushing axle gear strut fairings shown match Flaglors replica old 60 very reliable turned out non-Schnuerle engine didnt have quite enough power After several tempts get model unstuck tweaked engine max gave ship hefty shove Sid brought smoothly air made few turns handed transmitter saying doesnt need anything flew beautifully wasnt enough power maneuvers Sid discussed power situation new Webra 61 never run Sid felt would job hated change engines point since dummy engine made fit older 60 next night ran Webra couple hours test stand stalled Thanks Edson adjustable engine mount went easily got pleasant surprise dummy engine fit bet ter over Webra over orig inal engine muffler also fit no alterations took model across street flying field quite few folks flying got ready another test time everything flawless couldnt believe difference two en gines same displacement entire flight super landing good everything else returned shop spent rest night detailing didnt get everything wanted done felt model respectable enough take Nats Model Y en tered Sport Scale Gee Bee R-1 Gi ant Scale Model D FM However came time fly Model Y luck ran out out showing Ken Flaglor around Gee Bee coun 36 Model Aviation try night before models static judged went out early next day assembled Model Y took some pictures Kens replica model together got flight line Model Y eager fly since done beautifully test As soon started takeoff run knew some thing wrong model jumped air bounced back down lifted off lurched air corrected cor rected again fought steer over grass edge runway few sec onds later thanks radio failure completely out control rolled over its back fought upright went spin hit ground mightily disappointed big gest jolt yet come static scores posted found Model Y earned highest static score event 97 didnt get chance start repair job over six months rebuild front fuselage wing panel radio being repaired middle contest season flew three contests repaired Model Y still gun-shy events Nats did poor job flying Gee Bee first two events still managed come second third contest comfortable again flew model way should flown took first wide margin short time have model have enjoyed immensely Im looking forward flying will future plans presented include details building Model Y variants first Model Y NRl 1049 ring cowl its shown Plate 3 drawings landing gear aircraft differed others Dashed lines fuse lage drawing show variation aft end tail skid rather faired tail wheel second Model Y NR7 1 8Y two distinct configurations original smooth cowl open gear fairings plane appeared Chi cago Air Races 1933 bump cowl long windshield fully faired landing gear legs Ken Flaglors replica NR7l8L main subject drawings details shown aircrafl string ers ribs exactly scale markings shown exact positions appear relation ribs stringers Correct colors aircraft follows NRl 1049 white red trim black pinstripe separating colors NR7l8Y original cream red trim black pinstripeNR7l8Y 1933 white red trim black pinstripe NR7l8L cream red trim black pinstripe Choose version cut out parts start construction Fuselage Prepare %-in fuselage sides marked drawing small arrows Note platform stabilizer added top aft end building NRl 1049 will note slight difference front end sides shown Plate 3 drawings Also note forward fuselage bulkheads different shown next drawing fuselage front end ply fuselage doublers laminated basic sides extend F-6 front end sides sure make right left side Start fuselage structure gluing A-in ply F-3 -in balsa F-2 bulk heads place Make sure keep thing square point let assembly dry completely before pro ceeding remaining fuselage bulkheads added now tail brought together joined Install top bottom center stringers alternate remaining stringers gluing one side matching stringer other side progress Prepare firewall mounting en gine making required holes fuel lines throttle linkage Locate firewall against F-2 dont install yet Make compartment fuel tank between F-2 F-3 install tank top front fuselage can now sheeted planked A-in balsa prefer planking sheeting works well no compound curves completes basic fuselage structure cowl built assembling series rings have cut mateThe completed cowl after addition crankcase blank consists three layers rocker bumps Filler forms smooth fillets -in balsa cylinder bottoms have around bumps Notches visible inside traced onto blank areas cowl necessary proper cylinder fit cut out accommodate cylinder halves April 1988 37 Left Two sets cowl parts seen cowl frame has assembled other spread out show pieces top row front rings contains two balsa rings ply ring lower row contains two ply rings four spacers Above planked cowl left has sanded its final shape shaped cowl some rocker arm bump blanks has shaped Youll need 18 rocker bumps rials shown plans Glue C-i C-2 C-3 together glue C-4 C-5 other two sets rings joined A-in-sq balsa strips cut length shown pians Note slight taper front back cowl Make sure keep taper glue A-in-sq bal sa joiners place good idea build cardboard jig keep shape during assembly Trace side view cowl cardboard making two patterns Join 900 angle other cutting slot halfway front back side sliding together Using line up structure will assure proper shape Allow cowl structure dry completely before planking A-in balsa strips built dummy engine before planking cowl got thing fit perfectly before doing planking can build entire front end engine secured firewall dummy engine place cowl lined up attached firewall sheet metal screws through mounting tabs C-4 After completing unit firewall can fitted front fuselage epoxied place against F-2 Doing way allows line up perfect fit cowl fuselage After planking cowl carve sand final shape before adding cowl bumps time-consuming bumps go around front cowl curve must carefully fitted place cut blanks bumps band saw carved rough sanded tops shape before gluing place cowl have built dummy engine can glue bumps exact ly belong top side of cylinders cowl completed bumps place final sanding finishing can done cowl dummy engine assembly big job feel impressive part model dummy engine have done really much work Make crankcase gluing three layers A-in balsa together per patterns shown Use Wasp cylinders Williams Brothers using front half cylinder Draw curve tracing bot tom cylinder nine flat sides crankcase Cut away wood inside curves cylinder halves will fit Shape crankcase fit engine making necessary cutouts carburetor needle valve fits properly cylinders can epox ied place cutout crankcase drying 18 pushrods can cut proper length %-in birch dowel stock Make point end pushrod can pushed crankcase Sand pushrods smooth tack glue piece scrap balsa painting much easier trying paint after assembling dummy engine will want make two cylind ers removable allow cooling air come over engine flight done gluing plywood curve between two cyl inders side missing ones making up two removable cylinders ply insert behind cylinder see plans detail sheet metal screw through ply curve ply insert behind cylinder will hold place model display Wing Cut ribs proper material stack short pieces spar stock Sand stack ribs final shape Select hard balsa spars Make two spacer blocks scrap material 7 8 long support spars during wing construction Mark rib locations spar After sliding ribs onto spars support spars spacer blocks placed between two A- 1 ribs other between Rib D Rib E ribs proper positions glue place Glue 12-in piece square leading edge notches front rib Cut A-in trailing edge shape aileron block notch ribs Glue place Cut down 1 x %-in trailing edge stock 1% width glue place between ribs B Cut tip parts hard A-in balsa glue place Add x %-in tip rib braces Using couple pieces scrap A6 sheet spacers tack glue A-in aileron lead ing edge wing structure Glue 3/ aileron base leading edge Glue half ribs top bottom aileron base Add A-in ply plates top bottom wing brace wire top wing compression struts Make up landing gear mount blocks /l6 ply parts epoxy place wing panel can now sanded its final shape Cut aileron free wing structure glue %-in triangle pieces top bottom trailing edge between ribs B F Carve leading edge ailer round shape Install pine block inboard end aileron leading edge Carefully drill take end aluminum torque rod Make A-in ply bushings torque rods glue place ribs A-I B shown plans Make up A-in aluminum torque rod fit aileron Drill through pine block torque rod underside secure sheet metal screw Fit brass tube wire hinge other end aileron wing tip Build other wing panel just did first except build upside down spacer blocks over plans both panels finished can joined dihedral braces Test fit braces two panels together make sure perfect fit joint before gluing Use ep oxy glue panels together block up wing tips two blocks equal height between ribs tip will keep panels properly aligned epoxy sets panels dry center section can sheeted Y32 balsa Fit wing mount block between ply fuselage doublers epoxy place using %-in ply mount supports side Fit wing fuselage after installing dowel wing leading edge Drill tap wing block nylon bolt Fit wing faking block between wing trailing edge F-7 38 Model Aviation First crankcase shaped cut out accept 61 engine Williams Bros plastic cylinders glued place Back dummy engine has ply curve used hold removable cylinders Complete dummy engine except pushrods spark plugs Ignition wires fuselage can now completed addition rear bottom stringers tail wheel mount Also add %-in ply strut mount plates tail surfaces can simply cut A-in sheet balsa can built up prefer build up tail surfaces did cut base parts 34 hard balsa Add ribs outer edge parts same mate rial both top bottom base surfaces sand final shape Make A-in ply hinges shown plans realistic tail can course use favorite hinging system place shown Use joiner horn elevators An aluminum horn can installed rud der shown Wing fairing Cut two fillet bases A6 ply grain running crosswise length fillet base l2/ x 2 Fit base wing fairing block behind wing Assemble wing loosely fuselage Insert fillet bases between saddle wing Glue saddle making sure dont get glue wing Tighten wing down hold fillet bases place until glue dries Cut h-in balsa fillet blocks shown side view fuselage fill tween fuselage outer edges fillet bases blocks Fit fuselage curve wing/fuselage joint Allow glue dry completely carve sand proper shape Cut three wing fillet formers A-in balsa glue place between front rear fillet blocks Glue three other side well former should against rear front fillet block other two spaced evenly point rear fillet block Sheet plank fil let between front rear blocks Sand final shape dry Landing gear fafrings Refer front view landing gear fairing cut required parts proper materials Laminate parts together weight heavily hold place glue sets Install locating dowel front rear set wheel fairings Tack glue two fairing halves together carve sand shape After shaped fairings fit ted landing gear wires tack glued place Mount radio components areas shown plans according manufacturers instructions servos rudder elevator throttle can mount ed %-in ply tray screwed rails along inside fuselage sides rudder servo should mounted center three using cables connecting rudder will scale installed aluminum rudder horn An arrow shaft pushrod used elevator flexible pushrod throttle Two servos should used ailerons quite large Servos connected receiver cable battery can located beside fuel tank receiver can go under servo tray fuselage switch can mounted aft end servo tray can reached through cockpit Finishing ways finish April 1988 39 Glue /8-in-dowel dummy pushrods block wood make easier paint Lacking addition fuel tank cap fuel gauge make complete re built model ready contest circuit again model always does well static scoring finished dummy engine inside com pleted cowl finished seamless cowl looks like molded fiberglass true scale though thats exactly what Flaglor used replica Model V close look pitot tube lower brace wires spreader bar open landing gear fairings cant pick out picture spreader bars natural wood finish model Scale model type fa bric covering will realistic choice gave entire structure coat Balsarite used Coverites Permagloss material available correct shade cream Permagloss woven fab ric material same composition used full-size aircraft lighter weight prepainted fully finished comes off roll Permagloss gives realistic fabric look finished model results lighter finish could get paint Perma gloss also very durable impervious fuel solvents masked off trim areas gave coat Primex prepares Permagloss painting gives much better adhesion also enhan ces gloss painted trim used Black Baron Epoxy trim sprayed coat Black Baron Clear over once trim cured Registration numbers cut Coy erite Trimsheet material applied exact position shown plans Rudder numbers also cut Trimsheet material Coverite Pinstripes used outline registration numbers wing rudder racing number 7 fuselage sides Gee Bee logo fin cut black Trimsheet material printing rudder below registra tion numbers hand lettered draft ing pen given coat clear fuel-proof ink Built Ken Flaglor lettering left side fu selage under stab hand painted flying landing wires made elastic cord add final touch detailing cord threaded through wing wheel fairings made remov able fuselage connect point made oval plate three holes wires knotted behind plate small rectangular balsa block epoxied behind plate hook installed balsa block fuselage opening cut block fit wire hook pulls rubberbands looped around hook first plate through fuselage over hook second plate Flying full-size Gee Bee Model Ys wonderful flying aircraft Kens magnificent replica racing planes people believe high-performance sport aircraft NR1 1049 won national aerobatics title 1932 pi loted Russell Boardman model flies better RC Scale model experience built straight balanced shown plans will surprise its fine flying characteristics find its performance superior quarter-scale Model Ys Ive built model will start its takeoff roll very little rudder needed keep going straight tail will come up after short run slight back pressure stick will bring gently off ground modContinued page 133 SCAL RADIO CONTROL 8W Nt EWH CONTROL-UNE 000 VINTAGESMOOTHGOLDEN AGENEW sizes2/CONTOURsizes2/BALLOON 31/i"234 3/s 133/4131/4 13%2hz4/z 11443/i11/4311/443/g31451/4 11/2511/24141145334 1/61/i214514l7/a6h SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS 4LL1AMS Send $3 fully Illustrated catalog other kite accessorIes in~ DEPTMA PAWNEE ST SAN MARCOS CA 9 New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows walk yet Fully Aerobatic Complete Kit 89~ 56 wing 40 Length 40 Engine 4 lbs 4 CH Tiger Tail 4 New Deluxe Kit 16495 Fiber Glass Fuse & Belly Pan Foam wing & Stab Balsa & Plywood 72 wing Cajus RIC Pmducts 800 sq 112 Rosie SI Latayelte LA 70508 318 232-7446 Dealer inqutries invited April 1988 41 EELS FREE-FLIGHT Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Belly Pan Foam wing & Hwd Ask about Kit & Eng Combos NO MORE KICKBACKS THROWN PROPS popular best selling odd-on ignition system world Convert engine spark ignition breakerless capacitive discharge Ignition System can installed engines 60 up both 2 & 4 stroke both single & twin cylinders 4-strokers run absolutely beautiful ignition lOto 30% power 4stroke engIne No kickback throwing props Absolutely no pee-detonation death 4stroke engines Much lower priced fuel & no rusty bearings commercial fuel ovailable RedMas Very low 9001000 rmp reliable idle end easy hand starts can control ignition timing will stop predetonation engine will run mudi cooler develop power Now available completely shielded spark plug lead 90 plug cover Chosen TLG ME g & Byron Origleals its outstanding reliability Send $100 price list newsletter ordering Box 1732 CH Electronics IflCe Riverton WY 82501 307 857-6897 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1988/04
Page Numbers: 34, 35, 36, 37, 38, 39, 41, 133
Ken Flaglor Gee Bee Model Y MY FIRST GEE BEE model built 1975 time have built three Model Ys two model too spent day Ken Model Y found best- have quarter-scale size saw beautiful machine photographing flying model ever piloted Since Ken Flaglors replica decided build aircraft inside out Im sure have pic After having covered history full-size plane month Americas premier Gee Bee model builder takes us through construction start finish four-channel radios 61 engine Part 2 2 EHenry Haffke Top After unfortunate crash its contest debut Haffke rebuilt latest Model V immaculate condition seen Except addition some minor detailing its ready competition again Above Left Hows documentation 1/5-size Gee Bee nes tles underneath Ken Flaglors replica 1985 Nats Above Right beautiful front end what gives model great part Its appeal As model lacks brace wires oil cooler scoop spark plugs ignition wires pitot tube aileron balances appropriate prop 34 Model Aviation ture nut bolt screw can seen taking aircraft apart AMA Nats first held Springfield MA flown three models various Gee Bees competition Springfield birthplace Gee Bees area childhood home well Nats scheduled again 1985 decided build two new Gee Bees competition Both would models Kens Model Y would Sport Scale other would ful ly detailed FAI Scale competition Using stack photos taken other research able produce good set scale drawings cut two sets parts put two fuselages together started cowls took over two months finish cowls dummy engines point realized would nev er get two models completed time Nats concentrated Sport Scale model spent some late nights getting ready good friend Sid Clement agreed test flying Sid master pilot has flown other Gee Bee creations didnt have Model Y quite finished Sunday before Nats Sid took out test flying installed Left The basic fuselage sides i/a-in balsa Note stab platform rear two sides plywood wing saddle doubler Right After first few bulkheads glued fuselage sides structure begins take Gee bees familiar barrel shape Left if youve got good eye may have noticed bulkhead shown plan forward cockpit early fuselage Right Top side stringers place bottom stringers will added after wing fuselage joined Left Details see include direction grain wing fillet bases rear fairing block wing hold down block fuel tank lo cation Right completed wing fairings built up blocks forward aft have 1/8-in planking over fairing bulkheads April 1988 35 Left After bottom stringers have glued place tall wheel installed shown Right Construction left wing panel has completed now ready final shaping sanding Note aluminum torque rod used actuate aileron Left After wing built aileron cut free trailing edge torque rod bolt will become servo crank sections nylon control horns embedded wood housings serve bearings Right center section contaIns required two aileron servos Left Tail surfaces built up starting %2 sheet balsa base adding %2 ribs edges both sides form realistic surface course simpler version could made cutting surfaces out 1A-ln sheet balsa Right completed landing gear assemblies main gear strut Note brass tube bushing axle gear strut fairings shown match Flaglors replica old 60 very reliable turned out non-Schnuerle engine didnt have quite enough power After several tempts get model unstuck tweaked engine max gave ship hefty shove Sid brought smoothly air made few turns handed transmitter saying doesnt need anything flew beautifully wasnt enough power maneuvers Sid discussed power situation new Webra 61 never run Sid felt would job hated change engines point since dummy engine made fit older 60 next night ran Webra couple hours test stand stalled Thanks Edson adjustable engine mount went easily got pleasant surprise dummy engine fit bet ter over Webra over orig inal engine muffler also fit no alterations took model across street flying field quite few folks flying got ready another test time everything flawless couldnt believe difference two en gines same displacement entire flight super landing good everything else returned shop spent rest night detailing didnt get everything wanted done felt model respectable enough take Nats Model Y en tered Sport Scale Gee Bee R-1 Gi ant Scale Model D FM However came time fly Model Y luck ran out out showing Ken Flaglor around Gee Bee coun 36 Model Aviation try night before models static judged went out early next day assembled Model Y took some pictures Kens replica model together got flight line Model Y eager fly since done beautifully test As soon started takeoff run knew some thing wrong model jumped air bounced back down lifted off lurched air corrected cor rected again fought steer over grass edge runway few sec onds later thanks radio failure completely out control rolled over its back fought upright went spin hit ground mightily disappointed big gest jolt yet come static scores posted found Model Y earned highest static score event 97 didnt get chance start repair job over six months rebuild front fuselage wing panel radio being repaired middle contest season flew three contests repaired Model Y still gun-shy events Nats did poor job flying Gee Bee first two events still managed come second third contest comfortable again flew model way should flown took first wide margin short time have model have enjoyed immensely Im looking forward flying will future plans presented include details building Model Y variants first Model Y NRl 1049 ring cowl its shown Plate 3 drawings landing gear aircraft differed others Dashed lines fuse lage drawing show variation aft end tail skid rather faired tail wheel second Model Y NR7 1 8Y two distinct configurations original smooth cowl open gear fairings plane appeared Chi cago Air Races 1933 bump cowl long windshield fully faired landing gear legs Ken Flaglors replica NR7l8L main subject drawings details shown aircrafl string ers ribs exactly scale markings shown exact positions appear relation ribs stringers Correct colors aircraft follows NRl 1049 white red trim black pinstripe separating colors NR7l8Y original cream red trim black pinstripeNR7l8Y 1933 white red trim black pinstripe NR7l8L cream red trim black pinstripe Choose version cut out parts start construction Fuselage Prepare %-in fuselage sides marked drawing small arrows Note platform stabilizer added top aft end building NRl 1049 will note slight difference front end sides shown Plate 3 drawings Also note forward fuselage bulkheads different shown next drawing fuselage front end ply fuselage doublers laminated basic sides extend F-6 front end sides sure make right left side Start fuselage structure gluing A-in ply F-3 -in balsa F-2 bulk heads place Make sure keep thing square point let assembly dry completely before pro ceeding remaining fuselage bulkheads added now tail brought together joined Install top bottom center stringers alternate remaining stringers gluing one side matching stringer other side progress Prepare firewall mounting en gine making required holes fuel lines throttle linkage Locate firewall against F-2 dont install yet Make compartment fuel tank between F-2 F-3 install tank top front fuselage can now sheeted planked A-in balsa prefer planking sheeting works well no compound curves completes basic fuselage structure cowl built assembling series rings have cut mateThe completed cowl after addition crankcase blank consists three layers rocker bumps Filler forms smooth fillets -in balsa cylinder bottoms have around bumps Notches visible inside traced onto blank areas cowl necessary proper cylinder fit cut out accommodate cylinder halves April 1988 37 Left Two sets cowl parts seen cowl frame has assembled other spread out show pieces top row front rings contains two balsa rings ply ring lower row contains two ply rings four spacers Above planked cowl left has sanded its final shape shaped cowl some rocker arm bump blanks has shaped Youll need 18 rocker bumps rials shown plans Glue C-i C-2 C-3 together glue C-4 C-5 other two sets rings joined A-in-sq balsa strips cut length shown pians Note slight taper front back cowl Make sure keep taper glue A-in-sq bal sa joiners place good idea build cardboard jig keep shape during assembly Trace side view cowl cardboard making two patterns Join 900 angle other cutting slot halfway front back side sliding together Using line up structure will assure proper shape Allow cowl structure dry completely before planking A-in balsa strips built dummy engine before planking cowl got thing fit perfectly before doing planking can build entire front end engine secured firewall dummy engine place cowl lined up attached firewall sheet metal screws through mounting tabs C-4 After completing unit firewall can fitted front fuselage epoxied place against F-2 Doing way allows line up perfect fit cowl fuselage After planking cowl carve sand final shape before adding cowl bumps time-consuming bumps go around front cowl curve must carefully fitted place cut blanks bumps band saw carved rough sanded tops shape before gluing place cowl have built dummy engine can glue bumps exact ly belong top side of cylinders cowl completed bumps place final sanding finishing can done cowl dummy engine assembly big job feel impressive part model dummy engine have done really much work Make crankcase gluing three layers A-in balsa together per patterns shown Use Wasp cylinders Williams Brothers using front half cylinder Draw curve tracing bot tom cylinder nine flat sides crankcase Cut away wood inside curves cylinder halves will fit Shape crankcase fit engine making necessary cutouts carburetor needle valve fits properly cylinders can epox ied place cutout crankcase drying 18 pushrods can cut proper length %-in birch dowel stock Make point end pushrod can pushed crankcase Sand pushrods smooth tack glue piece scrap balsa painting much easier trying paint after assembling dummy engine will want make two cylind ers removable allow cooling air come over engine flight done gluing plywood curve between two cyl inders side missing ones making up two removable cylinders ply insert behind cylinder see plans detail sheet metal screw through ply curve ply insert behind cylinder will hold place model display Wing Cut ribs proper material stack short pieces spar stock Sand stack ribs final shape Select hard balsa spars Make two spacer blocks scrap material 7 8 long support spars during wing construction Mark rib locations spar After sliding ribs onto spars support spars spacer blocks placed between two A- 1 ribs other between Rib D Rib E ribs proper positions glue place Glue 12-in piece square leading edge notches front rib Cut A-in trailing edge shape aileron block notch ribs Glue place Cut down 1 x %-in trailing edge stock 1% width glue place between ribs B Cut tip parts hard A-in balsa glue place Add x %-in tip rib braces Using couple pieces scrap A6 sheet spacers tack glue A-in aileron lead ing edge wing structure Glue 3/ aileron base leading edge Glue half ribs top bottom aileron base Add A-in ply plates top bottom wing brace wire top wing compression struts Make up landing gear mount blocks /l6 ply parts epoxy place wing panel can now sanded its final shape Cut aileron free wing structure glue %-in triangle pieces top bottom trailing edge between ribs B F Carve leading edge ailer round shape Install pine block inboard end aileron leading edge Carefully drill take end aluminum torque rod Make A-in ply bushings torque rods glue place ribs A-I B shown plans Make up A-in aluminum torque rod fit aileron Drill through pine block torque rod underside secure sheet metal screw Fit brass tube wire hinge other end aileron wing tip Build other wing panel just did first except build upside down spacer blocks over plans both panels finished can joined dihedral braces Test fit braces two panels together make sure perfect fit joint before gluing Use ep oxy glue panels together block up wing tips two blocks equal height between ribs tip will keep panels properly aligned epoxy sets panels dry center section can sheeted Y32 balsa Fit wing mount block between ply fuselage doublers epoxy place using %-in ply mount supports side Fit wing fuselage after installing dowel wing leading edge Drill tap wing block nylon bolt Fit wing faking block between wing trailing edge F-7 38 Model Aviation First crankcase shaped cut out accept 61 engine Williams Bros plastic cylinders glued place Back dummy engine has ply curve used hold removable cylinders Complete dummy engine except pushrods spark plugs Ignition wires fuselage can now completed addition rear bottom stringers tail wheel mount Also add %-in ply strut mount plates tail surfaces can simply cut A-in sheet balsa can built up prefer build up tail surfaces did cut base parts 34 hard balsa Add ribs outer edge parts same mate rial both top bottom base surfaces sand final shape Make A-in ply hinges shown plans realistic tail can course use favorite hinging system place shown Use joiner horn elevators An aluminum horn can installed rud der shown Wing fairing Cut two fillet bases A6 ply grain running crosswise length fillet base l2/ x 2 Fit base wing fairing block behind wing Assemble wing loosely fuselage Insert fillet bases between saddle wing Glue saddle making sure dont get glue wing Tighten wing down hold fillet bases place until glue dries Cut h-in balsa fillet blocks shown side view fuselage fill tween fuselage outer edges fillet bases blocks Fit fuselage curve wing/fuselage joint Allow glue dry completely carve sand proper shape Cut three wing fillet formers A-in balsa glue place between front rear fillet blocks Glue three other side well former should against rear front fillet block other two spaced evenly point rear fillet block Sheet plank fil let between front rear blocks Sand final shape dry Landing gear fafrings Refer front view landing gear fairing cut required parts proper materials Laminate parts together weight heavily hold place glue sets Install locating dowel front rear set wheel fairings Tack glue two fairing halves together carve sand shape After shaped fairings fit ted landing gear wires tack glued place Mount radio components areas shown plans according manufacturers instructions servos rudder elevator throttle can mount ed %-in ply tray screwed rails along inside fuselage sides rudder servo should mounted center three using cables connecting rudder will scale installed aluminum rudder horn An arrow shaft pushrod used elevator flexible pushrod throttle Two servos should used ailerons quite large Servos connected receiver cable battery can located beside fuel tank receiver can go under servo tray fuselage switch can mounted aft end servo tray can reached through cockpit Finishing ways finish April 1988 39 Glue /8-in-dowel dummy pushrods block wood make easier paint Lacking addition fuel tank cap fuel gauge make complete re built model ready contest circuit again model always does well static scoring finished dummy engine inside com pleted cowl finished seamless cowl looks like molded fiberglass true scale though thats exactly what Flaglor used replica Model V close look pitot tube lower brace wires spreader bar open landing gear fairings cant pick out picture spreader bars natural wood finish model Scale model type fa bric covering will realistic choice gave entire structure coat Balsarite used Coverites Permagloss material available correct shade cream Permagloss woven fab ric material same composition used full-size aircraft lighter weight prepainted fully finished comes off roll Permagloss gives realistic fabric look finished model results lighter finish could get paint Perma gloss also very durable impervious fuel solvents masked off trim areas gave coat Primex prepares Permagloss painting gives much better adhesion also enhan ces gloss painted trim used Black Baron Epoxy trim sprayed coat Black Baron Clear over once trim cured Registration numbers cut Coy erite Trimsheet material applied exact position shown plans Rudder numbers also cut Trimsheet material Coverite Pinstripes used outline registration numbers wing rudder racing number 7 fuselage sides Gee Bee logo fin cut black Trimsheet material printing rudder below registra tion numbers hand lettered draft ing pen given coat clear fuel-proof ink Built Ken Flaglor lettering left side fu selage under stab hand painted flying landing wires made elastic cord add final touch detailing cord threaded through wing wheel fairings made remov able fuselage connect point made oval plate three holes wires knotted behind plate small rectangular balsa block epoxied behind plate hook installed balsa block fuselage opening cut block fit wire hook pulls rubberbands looped around hook first plate through fuselage over hook second plate Flying full-size Gee Bee Model Ys wonderful flying aircraft Kens magnificent replica racing planes people believe high-performance sport aircraft NR1 1049 won national aerobatics title 1932 pi loted Russell Boardman model flies better RC Scale model experience built straight balanced shown plans will surprise its fine flying characteristics find its performance superior quarter-scale Model Ys Ive built model will start its takeoff roll very little rudder needed keep going straight tail will come up after short run slight back pressure stick will bring gently off ground modContinued page 133 SCAL RADIO CONTROL 8W Nt EWH CONTROL-UNE 000 VINTAGESMOOTHGOLDEN AGENEW sizes2/CONTOURsizes2/BALLOON 31/i"234 3/s 133/4131/4 13%2hz4/z 11443/i11/4311/443/g31451/4 11/2511/24141145334 1/61/i214514l7/a6h SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS 4LL1AMS Send $3 fully Illustrated catalog other kite accessorIes in~ DEPTMA PAWNEE ST SAN MARCOS CA 9 New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows walk yet Fully Aerobatic Complete Kit 89~ 56 wing 40 Length 40 Engine 4 lbs 4 CH Tiger Tail 4 New Deluxe Kit 16495 Fiber Glass Fuse & Belly Pan Foam wing & Stab Balsa & Plywood 72 wing Cajus RIC Pmducts 800 sq 112 Rosie SI Latayelte LA 70508 318 232-7446 Dealer inqutries invited April 1988 41 EELS FREE-FLIGHT Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Belly Pan Foam wing & Hwd Ask about Kit & Eng Combos NO MORE KICKBACKS THROWN PROPS popular best selling odd-on ignition system world Convert engine spark ignition breakerless capacitive discharge Ignition System can installed engines 60 up both 2 & 4 stroke both single & twin cylinders 4-strokers run absolutely beautiful ignition lOto 30% power 4stroke engIne No kickback throwing props Absolutely no pee-detonation death 4stroke engines Much lower priced fuel & no rusty bearings commercial fuel ovailable RedMas Very low 9001000 rmp reliable idle end easy hand starts can control ignition timing will stop predetonation engine will run mudi cooler develop power Now available completely shielded spark plug lead 90 plug cover Chosen TLG ME g & Byron Origleals its outstanding reliability Send $100 price list newsletter ordering Box 1732 CH Electronics IflCe Riverton WY 82501 307 857-6897 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1988/04
Page Numbers: 34, 35, 36, 37, 38, 39, 41, 133
Ken Flaglor Gee Bee Model Y MY FIRST GEE BEE model built 1975 time have built three Model Ys two model too spent day Ken Model Y found best- have quarter-scale size saw beautiful machine photographing flying model ever piloted Since Ken Flaglors replica decided build aircraft inside out Im sure have pic After having covered history full-size plane month Americas premier Gee Bee model builder takes us through construction start finish four-channel radios 61 engine Part 2 2 EHenry Haffke Top After unfortunate crash its contest debut Haffke rebuilt latest Model V immaculate condition seen Except addition some minor detailing its ready competition again Above Left Hows documentation 1/5-size Gee Bee nes tles underneath Ken Flaglors replica 1985 Nats Above Right beautiful front end what gives model great part Its appeal As model lacks brace wires oil cooler scoop spark plugs ignition wires pitot tube aileron balances appropriate prop 34 Model Aviation ture nut bolt screw can seen taking aircraft apart AMA Nats first held Springfield MA flown three models various Gee Bees competition Springfield birthplace Gee Bees area childhood home well Nats scheduled again 1985 decided build two new Gee Bees competition Both would models Kens Model Y would Sport Scale other would ful ly detailed FAI Scale competition Using stack photos taken other research able produce good set scale drawings cut two sets parts put two fuselages together started cowls took over two months finish cowls dummy engines point realized would nev er get two models completed time Nats concentrated Sport Scale model spent some late nights getting ready good friend Sid Clement agreed test flying Sid master pilot has flown other Gee Bee creations didnt have Model Y quite finished Sunday before Nats Sid took out test flying installed Left The basic fuselage sides i/a-in balsa Note stab platform rear two sides plywood wing saddle doubler Right After first few bulkheads glued fuselage sides structure begins take Gee bees familiar barrel shape Left if youve got good eye may have noticed bulkhead shown plan forward cockpit early fuselage Right Top side stringers place bottom stringers will added after wing fuselage joined Left Details see include direction grain wing fillet bases rear fairing block wing hold down block fuel tank lo cation Right completed wing fairings built up blocks forward aft have 1/8-in planking over fairing bulkheads April 1988 35 Left After bottom stringers have glued place tall wheel installed shown Right Construction left wing panel has completed now ready final shaping sanding Note aluminum torque rod used actuate aileron Left After wing built aileron cut free trailing edge torque rod bolt will become servo crank sections nylon control horns embedded wood housings serve bearings Right center section contaIns required two aileron servos Left Tail surfaces built up starting %2 sheet balsa base adding %2 ribs edges both sides form realistic surface course simpler version could made cutting surfaces out 1A-ln sheet balsa Right completed landing gear assemblies main gear strut Note brass tube bushing axle gear strut fairings shown match Flaglors replica old 60 very reliable turned out non-Schnuerle engine didnt have quite enough power After several tempts get model unstuck tweaked engine max gave ship hefty shove Sid brought smoothly air made few turns handed transmitter saying doesnt need anything flew beautifully wasnt enough power maneuvers Sid discussed power situation new Webra 61 never run Sid felt would job hated change engines point since dummy engine made fit older 60 next night ran Webra couple hours test stand stalled Thanks Edson adjustable engine mount went easily got pleasant surprise dummy engine fit bet ter over Webra over orig inal engine muffler also fit no alterations took model across street flying field quite few folks flying got ready another test time everything flawless couldnt believe difference two en gines same displacement entire flight super landing good everything else returned shop spent rest night detailing didnt get everything wanted done felt model respectable enough take Nats Model Y en tered Sport Scale Gee Bee R-1 Gi ant Scale Model D FM However came time fly Model Y luck ran out out showing Ken Flaglor around Gee Bee coun 36 Model Aviation try night before models static judged went out early next day assembled Model Y took some pictures Kens replica model together got flight line Model Y eager fly since done beautifully test As soon started takeoff run knew some thing wrong model jumped air bounced back down lifted off lurched air corrected cor rected again fought steer over grass edge runway few sec onds later thanks radio failure completely out control rolled over its back fought upright went spin hit ground mightily disappointed big gest jolt yet come static scores posted found Model Y earned highest static score event 97 didnt get chance start repair job over six months rebuild front fuselage wing panel radio being repaired middle contest season flew three contests repaired Model Y still gun-shy events Nats did poor job flying Gee Bee first two events still managed come second third contest comfortable again flew model way should flown took first wide margin short time have model have enjoyed immensely Im looking forward flying will future plans presented include details building Model Y variants first Model Y NRl 1049 ring cowl its shown Plate 3 drawings landing gear aircraft differed others Dashed lines fuse lage drawing show variation aft end tail skid rather faired tail wheel second Model Y NR7 1 8Y two distinct configurations original smooth cowl open gear fairings plane appeared Chi cago Air Races 1933 bump cowl long windshield fully faired landing gear legs Ken Flaglors replica NR7l8L main subject drawings details shown aircrafl string ers ribs exactly scale markings shown exact positions appear relation ribs stringers Correct colors aircraft follows NRl 1049 white red trim black pinstripe separating colors NR7l8Y original cream red trim black pinstripeNR7l8Y 1933 white red trim black pinstripe NR7l8L cream red trim black pinstripe Choose version cut out parts start construction Fuselage Prepare %-in fuselage sides marked drawing small arrows Note platform stabilizer added top aft end building NRl 1049 will note slight difference front end sides shown Plate 3 drawings Also note forward fuselage bulkheads different shown next drawing fuselage front end ply fuselage doublers laminated basic sides extend F-6 front end sides sure make right left side Start fuselage structure gluing A-in ply F-3 -in balsa F-2 bulk heads place Make sure keep thing square point let assembly dry completely before pro ceeding remaining fuselage bulkheads added now tail brought together joined Install top bottom center stringers alternate remaining stringers gluing one side matching stringer other side progress Prepare firewall mounting en gine making required holes fuel lines throttle linkage Locate firewall against F-2 dont install yet Make compartment fuel tank between F-2 F-3 install tank top front fuselage can now sheeted planked A-in balsa prefer planking sheeting works well no compound curves completes basic fuselage structure cowl built assembling series rings have cut mateThe completed cowl after addition crankcase blank consists three layers rocker bumps Filler forms smooth fillets -in balsa cylinder bottoms have around bumps Notches visible inside traced onto blank areas cowl necessary proper cylinder fit cut out accommodate cylinder halves April 1988 37 Left Two sets cowl parts seen cowl frame has assembled other spread out show pieces top row front rings contains two balsa rings ply ring lower row contains two ply rings four spacers Above planked cowl left has sanded its final shape shaped cowl some rocker arm bump blanks has shaped Youll need 18 rocker bumps rials shown plans Glue C-i C-2 C-3 together glue C-4 C-5 other two sets rings joined A-in-sq balsa strips cut length shown pians Note slight taper front back cowl Make sure keep taper glue A-in-sq bal sa joiners place good idea build cardboard jig keep shape during assembly Trace side view cowl cardboard making two patterns Join 900 angle other cutting slot halfway front back side sliding together Using line up structure will assure proper shape Allow cowl structure dry completely before planking A-in balsa strips built dummy engine before planking cowl got thing fit perfectly before doing planking can build entire front end engine secured firewall dummy engine place cowl lined up attached firewall sheet metal screws through mounting tabs C-4 After completing unit firewall can fitted front fuselage epoxied place against F-2 Doing way allows line up perfect fit cowl fuselage After planking cowl carve sand final shape before adding cowl bumps time-consuming bumps go around front cowl curve must carefully fitted place cut blanks bumps band saw carved rough sanded tops shape before gluing place cowl have built dummy engine can glue bumps exact ly belong top side of cylinders cowl completed bumps place final sanding finishing can done cowl dummy engine assembly big job feel impressive part model dummy engine have done really much work Make crankcase gluing three layers A-in balsa together per patterns shown Use Wasp cylinders Williams Brothers using front half cylinder Draw curve tracing bot tom cylinder nine flat sides crankcase Cut away wood inside curves cylinder halves will fit Shape crankcase fit engine making necessary cutouts carburetor needle valve fits properly cylinders can epox ied place cutout crankcase drying 18 pushrods can cut proper length %-in birch dowel stock Make point end pushrod can pushed crankcase Sand pushrods smooth tack glue piece scrap balsa painting much easier trying paint after assembling dummy engine will want make two cylind ers removable allow cooling air come over engine flight done gluing plywood curve between two cyl inders side missing ones making up two removable cylinders ply insert behind cylinder see plans detail sheet metal screw through ply curve ply insert behind cylinder will hold place model display Wing Cut ribs proper material stack short pieces spar stock Sand stack ribs final shape Select hard balsa spars Make two spacer blocks scrap material 7 8 long support spars during wing construction Mark rib locations spar After sliding ribs onto spars support spars spacer blocks placed between two A- 1 ribs other between Rib D Rib E ribs proper positions glue place Glue 12-in piece square leading edge notches front rib Cut A-in trailing edge shape aileron block notch ribs Glue place Cut down 1 x %-in trailing edge stock 1% width glue place between ribs B Cut tip parts hard A-in balsa glue place Add x %-in tip rib braces Using couple pieces scrap A6 sheet spacers tack glue A-in aileron lead ing edge wing structure Glue 3/ aileron base leading edge Glue half ribs top bottom aileron base Add A-in ply plates top bottom wing brace wire top wing compression struts Make up landing gear mount blocks /l6 ply parts epoxy place wing panel can now sanded its final shape Cut aileron free wing structure glue %-in triangle pieces top bottom trailing edge between ribs B F Carve leading edge ailer round shape Install pine block inboard end aileron leading edge Carefully drill take end aluminum torque rod Make A-in ply bushings torque rods glue place ribs A-I B shown plans Make up A-in aluminum torque rod fit aileron Drill through pine block torque rod underside secure sheet metal screw Fit brass tube wire hinge other end aileron wing tip Build other wing panel just did first except build upside down spacer blocks over plans both panels finished can joined dihedral braces Test fit braces two panels together make sure perfect fit joint before gluing Use ep oxy glue panels together block up wing tips two blocks equal height between ribs tip will keep panels properly aligned epoxy sets panels dry center section can sheeted Y32 balsa Fit wing mount block between ply fuselage doublers epoxy place using %-in ply mount supports side Fit wing fuselage after installing dowel wing leading edge Drill tap wing block nylon bolt Fit wing faking block between wing trailing edge F-7 38 Model Aviation First crankcase shaped cut out accept 61 engine Williams Bros plastic cylinders glued place Back dummy engine has ply curve used hold removable cylinders Complete dummy engine except pushrods spark plugs Ignition wires fuselage can now completed addition rear bottom stringers tail wheel mount Also add %-in ply strut mount plates tail surfaces can simply cut A-in sheet balsa can built up prefer build up tail surfaces did cut base parts 34 hard balsa Add ribs outer edge parts same mate rial both top bottom base surfaces sand final shape Make A-in ply hinges shown plans realistic tail can course use favorite hinging system place shown Use joiner horn elevators An aluminum horn can installed rud der shown Wing fairing Cut two fillet bases A6 ply grain running crosswise length fillet base l2/ x 2 Fit base wing fairing block behind wing Assemble wing loosely fuselage Insert fillet bases between saddle wing Glue saddle making sure dont get glue wing Tighten wing down hold fillet bases place until glue dries Cut h-in balsa fillet blocks shown side view fuselage fill tween fuselage outer edges fillet bases blocks Fit fuselage curve wing/fuselage joint Allow glue dry completely carve sand proper shape Cut three wing fillet formers A-in balsa glue place between front rear fillet blocks Glue three other side well former should against rear front fillet block other two spaced evenly point rear fillet block Sheet plank fil let between front rear blocks Sand final shape dry Landing gear fafrings Refer front view landing gear fairing cut required parts proper materials Laminate parts together weight heavily hold place glue sets Install locating dowel front rear set wheel fairings Tack glue two fairing halves together carve sand shape After shaped fairings fit ted landing gear wires tack glued place Mount radio components areas shown plans according manufacturers instructions servos rudder elevator throttle can mount ed %-in ply tray screwed rails along inside fuselage sides rudder servo should mounted center three using cables connecting rudder will scale installed aluminum rudder horn An arrow shaft pushrod used elevator flexible pushrod throttle Two servos should used ailerons quite large Servos connected receiver cable battery can located beside fuel tank receiver can go under servo tray fuselage switch can mounted aft end servo tray can reached through cockpit Finishing ways finish April 1988 39 Glue /8-in-dowel dummy pushrods block wood make easier paint Lacking addition fuel tank cap fuel gauge make complete re built model ready contest circuit again model always does well static scoring finished dummy engine inside com pleted cowl finished seamless cowl looks like molded fiberglass true scale though thats exactly what Flaglor used replica Model V close look pitot tube lower brace wires spreader bar open landing gear fairings cant pick out picture spreader bars natural wood finish model Scale model type fa bric covering will realistic choice gave entire structure coat Balsarite used Coverites Permagloss material available correct shade cream Permagloss woven fab ric material same composition used full-size aircraft lighter weight prepainted fully finished comes off roll Permagloss gives realistic fabric look finished model results lighter finish could get paint Perma gloss also very durable impervious fuel solvents masked off trim areas gave coat Primex prepares Permagloss painting gives much better adhesion also enhan ces gloss painted trim used Black Baron Epoxy trim sprayed coat Black Baron Clear over once trim cured Registration numbers cut Coy erite Trimsheet material applied exact position shown plans Rudder numbers also cut Trimsheet material Coverite Pinstripes used outline registration numbers wing rudder racing number 7 fuselage sides Gee Bee logo fin cut black Trimsheet material printing rudder below registra tion numbers hand lettered draft ing pen given coat clear fuel-proof ink Built Ken Flaglor lettering left side fu selage under stab hand painted flying landing wires made elastic cord add final touch detailing cord threaded through wing wheel fairings made remov able fuselage connect point made oval plate three holes wires knotted behind plate small rectangular balsa block epoxied behind plate hook installed balsa block fuselage opening cut block fit wire hook pulls rubberbands looped around hook first plate through fuselage over hook second plate Flying full-size Gee Bee Model Ys wonderful flying aircraft Kens magnificent replica racing planes people believe high-performance sport aircraft NR1 1049 won national aerobatics title 1932 pi loted Russell Boardman model flies better RC Scale model experience built straight balanced shown plans will surprise its fine flying characteristics find its performance superior quarter-scale Model Ys Ive built model will start its takeoff roll very little rudder needed keep going straight tail will come up after short run slight back pressure stick will bring gently off ground modContinued page 133 SCAL RADIO CONTROL 8W Nt EWH CONTROL-UNE 000 VINTAGESMOOTHGOLDEN AGENEW sizes2/CONTOURsizes2/BALLOON 31/i"234 3/s 133/4131/4 13%2hz4/z 11443/i11/4311/443/g31451/4 11/2511/24141145334 1/61/i214514l7/a6h SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS 4LL1AMS Send $3 fully Illustrated catalog other kite accessorIes in~ DEPTMA PAWNEE ST SAN MARCOS CA 9 New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows walk yet Fully Aerobatic Complete Kit 89~ 56 wing 40 Length 40 Engine 4 lbs 4 CH Tiger Tail 4 New Deluxe Kit 16495 Fiber Glass Fuse & Belly Pan Foam wing & Stab Balsa & Plywood 72 wing Cajus RIC Pmducts 800 sq 112 Rosie SI Latayelte LA 70508 318 232-7446 Dealer inqutries invited April 1988 41 EELS FREE-FLIGHT Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Belly Pan Foam wing & Hwd Ask about Kit & Eng Combos NO MORE KICKBACKS THROWN PROPS popular best selling odd-on ignition system world Convert engine spark ignition breakerless capacitive discharge Ignition System can installed engines 60 up both 2 & 4 stroke both single & twin cylinders 4-strokers run absolutely beautiful ignition lOto 30% power 4stroke engIne No kickback throwing props Absolutely no pee-detonation death 4stroke engines Much lower priced fuel & no rusty bearings commercial fuel ovailable RedMas Very low 9001000 rmp reliable idle end easy hand starts can control ignition timing will stop predetonation engine will run mudi cooler develop power Now available completely shielded spark plug lead 90 plug cover Chosen TLG ME g & Byron Origleals its outstanding reliability Send $100 price list newsletter ordering Box 1732 CH Electronics IflCe Riverton WY 82501 307 857-6897 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1988/04
Page Numbers: 34, 35, 36, 37, 38, 39, 41, 133
Ken Flaglor Gee Bee Model Y MY FIRST GEE BEE model built 1975 time have built three Model Ys two model too spent day Ken Model Y found best- have quarter-scale size saw beautiful machine photographing flying model ever piloted Since Ken Flaglors replica decided build aircraft inside out Im sure have pic After having covered history full-size plane month Americas premier Gee Bee model builder takes us through construction start finish four-channel radios 61 engine Part 2 2 EHenry Haffke Top After unfortunate crash its contest debut Haffke rebuilt latest Model V immaculate condition seen Except addition some minor detailing its ready competition again Above Left Hows documentation 1/5-size Gee Bee nes tles underneath Ken Flaglors replica 1985 Nats Above Right beautiful front end what gives model great part Its appeal As model lacks brace wires oil cooler scoop spark plugs ignition wires pitot tube aileron balances appropriate prop 34 Model Aviation ture nut bolt screw can seen taking aircraft apart AMA Nats first held Springfield MA flown three models various Gee Bees competition Springfield birthplace Gee Bees area childhood home well Nats scheduled again 1985 decided build two new Gee Bees competition Both would models Kens Model Y would Sport Scale other would ful ly detailed FAI Scale competition Using stack photos taken other research able produce good set scale drawings cut two sets parts put two fuselages together started cowls took over two months finish cowls dummy engines point realized would nev er get two models completed time Nats concentrated Sport Scale model spent some late nights getting ready good friend Sid Clement agreed test flying Sid master pilot has flown other Gee Bee creations didnt have Model Y quite finished Sunday before Nats Sid took out test flying installed Left The basic fuselage sides i/a-in balsa Note stab platform rear two sides plywood wing saddle doubler Right After first few bulkheads glued fuselage sides structure begins take Gee bees familiar barrel shape Left if youve got good eye may have noticed bulkhead shown plan forward cockpit early fuselage Right Top side stringers place bottom stringers will added after wing fuselage joined Left Details see include direction grain wing fillet bases rear fairing block wing hold down block fuel tank lo cation Right completed wing fairings built up blocks forward aft have 1/8-in planking over fairing bulkheads April 1988 35 Left After bottom stringers have glued place tall wheel installed shown Right Construction left wing panel has completed now ready final shaping sanding Note aluminum torque rod used actuate aileron Left After wing built aileron cut free trailing edge torque rod bolt will become servo crank sections nylon control horns embedded wood housings serve bearings Right center section contaIns required two aileron servos Left Tail surfaces built up starting %2 sheet balsa base adding %2 ribs edges both sides form realistic surface course simpler version could made cutting surfaces out 1A-ln sheet balsa Right completed landing gear assemblies main gear strut Note brass tube bushing axle gear strut fairings shown match Flaglors replica old 60 very reliable turned out non-Schnuerle engine didnt have quite enough power After several tempts get model unstuck tweaked engine max gave ship hefty shove Sid brought smoothly air made few turns handed transmitter saying doesnt need anything flew beautifully wasnt enough power maneuvers Sid discussed power situation new Webra 61 never run Sid felt would job hated change engines point since dummy engine made fit older 60 next night ran Webra couple hours test stand stalled Thanks Edson adjustable engine mount went easily got pleasant surprise dummy engine fit bet ter over Webra over orig inal engine muffler also fit no alterations took model across street flying field quite few folks flying got ready another test time everything flawless couldnt believe difference two en gines same displacement entire flight super landing good everything else returned shop spent rest night detailing didnt get everything wanted done felt model respectable enough take Nats Model Y en tered Sport Scale Gee Bee R-1 Gi ant Scale Model D FM However came time fly Model Y luck ran out out showing Ken Flaglor around Gee Bee coun 36 Model Aviation try night before models static judged went out early next day assembled Model Y took some pictures Kens replica model together got flight line Model Y eager fly since done beautifully test As soon started takeoff run knew some thing wrong model jumped air bounced back down lifted off lurched air corrected cor rected again fought steer over grass edge runway few sec onds later thanks radio failure completely out control rolled over its back fought upright went spin hit ground mightily disappointed big gest jolt yet come static scores posted found Model Y earned highest static score event 97 didnt get chance start repair job over six months rebuild front fuselage wing panel radio being repaired middle contest season flew three contests repaired Model Y still gun-shy events Nats did poor job flying Gee Bee first two events still managed come second third contest comfortable again flew model way should flown took first wide margin short time have model have enjoyed immensely Im looking forward flying will future plans presented include details building Model Y variants first Model Y NRl 1049 ring cowl its shown Plate 3 drawings landing gear aircraft differed others Dashed lines fuse lage drawing show variation aft end tail skid rather faired tail wheel second Model Y NR7 1 8Y two distinct configurations original smooth cowl open gear fairings plane appeared Chi cago Air Races 1933 bump cowl long windshield fully faired landing gear legs Ken Flaglors replica NR7l8L main subject drawings details shown aircrafl string ers ribs exactly scale markings shown exact positions appear relation ribs stringers Correct colors aircraft follows NRl 1049 white red trim black pinstripe separating colors NR7l8Y original cream red trim black pinstripeNR7l8Y 1933 white red trim black pinstripe NR7l8L cream red trim black pinstripe Choose version cut out parts start construction Fuselage Prepare %-in fuselage sides marked drawing small arrows Note platform stabilizer added top aft end building NRl 1049 will note slight difference front end sides shown Plate 3 drawings Also note forward fuselage bulkheads different shown next drawing fuselage front end ply fuselage doublers laminated basic sides extend F-6 front end sides sure make right left side Start fuselage structure gluing A-in ply F-3 -in balsa F-2 bulk heads place Make sure keep thing square point let assembly dry completely before pro ceeding remaining fuselage bulkheads added now tail brought together joined Install top bottom center stringers alternate remaining stringers gluing one side matching stringer other side progress Prepare firewall mounting en gine making required holes fuel lines throttle linkage Locate firewall against F-2 dont install yet Make compartment fuel tank between F-2 F-3 install tank top front fuselage can now sheeted planked A-in balsa prefer planking sheeting works well no compound curves completes basic fuselage structure cowl built assembling series rings have cut mateThe completed cowl after addition crankcase blank consists three layers rocker bumps Filler forms smooth fillets -in balsa cylinder bottoms have around bumps Notches visible inside traced onto blank areas cowl necessary proper cylinder fit cut out accommodate cylinder halves April 1988 37 Left Two sets cowl parts seen cowl frame has assembled other spread out show pieces top row front rings contains two balsa rings ply ring lower row contains two ply rings four spacers Above planked cowl left has sanded its final shape shaped cowl some rocker arm bump blanks has shaped Youll need 18 rocker bumps rials shown plans Glue C-i C-2 C-3 together glue C-4 C-5 other two sets rings joined A-in-sq balsa strips cut length shown pians Note slight taper front back cowl Make sure keep taper glue A-in-sq bal sa joiners place good idea build cardboard jig keep shape during assembly Trace side view cowl cardboard making two patterns Join 900 angle other cutting slot halfway front back side sliding together Using line up structure will assure proper shape Allow cowl structure dry completely before planking A-in balsa strips built dummy engine before planking cowl got thing fit perfectly before doing planking can build entire front end engine secured firewall dummy engine place cowl lined up attached firewall sheet metal screws through mounting tabs C-4 After completing unit firewall can fitted front fuselage epoxied place against F-2 Doing way allows line up perfect fit cowl fuselage After planking cowl carve sand final shape before adding cowl bumps time-consuming bumps go around front cowl curve must carefully fitted place cut blanks bumps band saw carved rough sanded tops shape before gluing place cowl have built dummy engine can glue bumps exact ly belong top side of cylinders cowl completed bumps place final sanding finishing can done cowl dummy engine assembly big job feel impressive part model dummy engine have done really much work Make crankcase gluing three layers A-in balsa together per patterns shown Use Wasp cylinders Williams Brothers using front half cylinder Draw curve tracing bot tom cylinder nine flat sides crankcase Cut away wood inside curves cylinder halves will fit Shape crankcase fit engine making necessary cutouts carburetor needle valve fits properly cylinders can epox ied place cutout crankcase drying 18 pushrods can cut proper length %-in birch dowel stock Make point end pushrod can pushed crankcase Sand pushrods smooth tack glue piece scrap balsa painting much easier trying paint after assembling dummy engine will want make two cylind ers removable allow cooling air come over engine flight done gluing plywood curve between two cyl inders side missing ones making up two removable cylinders ply insert behind cylinder see plans detail sheet metal screw through ply curve ply insert behind cylinder will hold place model display Wing Cut ribs proper material stack short pieces spar stock Sand stack ribs final shape Select hard balsa spars Make two spacer blocks scrap material 7 8 long support spars during wing construction Mark rib locations spar After sliding ribs onto spars support spars spacer blocks placed between two A- 1 ribs other between Rib D Rib E ribs proper positions glue place Glue 12-in piece square leading edge notches front rib Cut A-in trailing edge shape aileron block notch ribs Glue place Cut down 1 x %-in trailing edge stock 1% width glue place between ribs B Cut tip parts hard A-in balsa glue place Add x %-in tip rib braces Using couple pieces scrap A6 sheet spacers tack glue A-in aileron lead ing edge wing structure Glue 3/ aileron base leading edge Glue half ribs top bottom aileron base Add A-in ply plates top bottom wing brace wire top wing compression struts Make up landing gear mount blocks /l6 ply parts epoxy place wing panel can now sanded its final shape Cut aileron free wing structure glue %-in triangle pieces top bottom trailing edge between ribs B F Carve leading edge ailer round shape Install pine block inboard end aileron leading edge Carefully drill take end aluminum torque rod Make A-in ply bushings torque rods glue place ribs A-I B shown plans Make up A-in aluminum torque rod fit aileron Drill through pine block torque rod underside secure sheet metal screw Fit brass tube wire hinge other end aileron wing tip Build other wing panel just did first except build upside down spacer blocks over plans both panels finished can joined dihedral braces Test fit braces two panels together make sure perfect fit joint before gluing Use ep oxy glue panels together block up wing tips two blocks equal height between ribs tip will keep panels properly aligned epoxy sets panels dry center section can sheeted Y32 balsa Fit wing mount block between ply fuselage doublers epoxy place using %-in ply mount supports side Fit wing fuselage after installing dowel wing leading edge Drill tap wing block nylon bolt Fit wing faking block between wing trailing edge F-7 38 Model Aviation First crankcase shaped cut out accept 61 engine Williams Bros plastic cylinders glued place Back dummy engine has ply curve used hold removable cylinders Complete dummy engine except pushrods spark plugs Ignition wires fuselage can now completed addition rear bottom stringers tail wheel mount Also add %-in ply strut mount plates tail surfaces can simply cut A-in sheet balsa can built up prefer build up tail surfaces did cut base parts 34 hard balsa Add ribs outer edge parts same mate rial both top bottom base surfaces sand final shape Make A-in ply hinges shown plans realistic tail can course use favorite hinging system place shown Use joiner horn elevators An aluminum horn can installed rud der shown Wing fairing Cut two fillet bases A6 ply grain running crosswise length fillet base l2/ x 2 Fit base wing fairing block behind wing Assemble wing loosely fuselage Insert fillet bases between saddle wing Glue saddle making sure dont get glue wing Tighten wing down hold fillet bases place until glue dries Cut h-in balsa fillet blocks shown side view fuselage fill tween fuselage outer edges fillet bases blocks Fit fuselage curve wing/fuselage joint Allow glue dry completely carve sand proper shape Cut three wing fillet formers A-in balsa glue place between front rear fillet blocks Glue three other side well former should against rear front fillet block other two spaced evenly point rear fillet block Sheet plank fil let between front rear blocks Sand final shape dry Landing gear fafrings Refer front view landing gear fairing cut required parts proper materials Laminate parts together weight heavily hold place glue sets Install locating dowel front rear set wheel fairings Tack glue two fairing halves together carve sand shape After shaped fairings fit ted landing gear wires tack glued place Mount radio components areas shown plans according manufacturers instructions servos rudder elevator throttle can mount ed %-in ply tray screwed rails along inside fuselage sides rudder servo should mounted center three using cables connecting rudder will scale installed aluminum rudder horn An arrow shaft pushrod used elevator flexible pushrod throttle Two servos should used ailerons quite large Servos connected receiver cable battery can located beside fuel tank receiver can go under servo tray fuselage switch can mounted aft end servo tray can reached through cockpit Finishing ways finish April 1988 39 Glue /8-in-dowel dummy pushrods block wood make easier paint Lacking addition fuel tank cap fuel gauge make complete re built model ready contest circuit again model always does well static scoring finished dummy engine inside com pleted cowl finished seamless cowl looks like molded fiberglass true scale though thats exactly what Flaglor used replica Model V close look pitot tube lower brace wires spreader bar open landing gear fairings cant pick out picture spreader bars natural wood finish model Scale model type fa bric covering will realistic choice gave entire structure coat Balsarite used Coverites Permagloss material available correct shade cream Permagloss woven fab ric material same composition used full-size aircraft lighter weight prepainted fully finished comes off roll Permagloss gives realistic fabric look finished model results lighter finish could get paint Perma gloss also very durable impervious fuel solvents masked off trim areas gave coat Primex prepares Permagloss painting gives much better adhesion also enhan ces gloss painted trim used Black Baron Epoxy trim sprayed coat Black Baron Clear over once trim cured Registration numbers cut Coy erite Trimsheet material applied exact position shown plans Rudder numbers also cut Trimsheet material Coverite Pinstripes used outline registration numbers wing rudder racing number 7 fuselage sides Gee Bee logo fin cut black Trimsheet material printing rudder below registra tion numbers hand lettered draft ing pen given coat clear fuel-proof ink Built Ken Flaglor lettering left side fu selage under stab hand painted flying landing wires made elastic cord add final touch detailing cord threaded through wing wheel fairings made remov able fuselage connect point made oval plate three holes wires knotted behind plate small rectangular balsa block epoxied behind plate hook installed balsa block fuselage opening cut block fit wire hook pulls rubberbands looped around hook first plate through fuselage over hook second plate Flying full-size Gee Bee Model Ys wonderful flying aircraft Kens magnificent replica racing planes people believe high-performance sport aircraft NR1 1049 won national aerobatics title 1932 pi loted Russell Boardman model flies better RC Scale model experience built straight balanced shown plans will surprise its fine flying characteristics find its performance superior quarter-scale Model Ys Ive built model will start its takeoff roll very little rudder needed keep going straight tail will come up after short run slight back pressure stick will bring gently off ground modContinued page 133 SCAL RADIO CONTROL 8W Nt EWH CONTROL-UNE 000 VINTAGESMOOTHGOLDEN AGENEW sizes2/CONTOURsizes2/BALLOON 31/i"234 3/s 133/4131/4 13%2hz4/z 11443/i11/4311/443/g31451/4 11/2511/24141145334 1/61/i214514l7/a6h SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS 4LL1AMS Send $3 fully Illustrated catalog other kite accessorIes in~ DEPTMA PAWNEE ST SAN MARCOS CA 9 New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows walk yet Fully Aerobatic Complete Kit 89~ 56 wing 40 Length 40 Engine 4 lbs 4 CH Tiger Tail 4 New Deluxe Kit 16495 Fiber Glass Fuse & Belly Pan Foam wing & Stab Balsa & Plywood 72 wing Cajus RIC Pmducts 800 sq 112 Rosie SI Latayelte LA 70508 318 232-7446 Dealer inqutries invited April 1988 41 EELS FREE-FLIGHT Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Belly Pan Foam wing & Hwd Ask about Kit & Eng Combos NO MORE KICKBACKS THROWN PROPS popular best selling odd-on ignition system world Convert engine spark ignition breakerless capacitive discharge Ignition System can installed engines 60 up both 2 & 4 stroke both single & twin cylinders 4-strokers run absolutely beautiful ignition lOto 30% power 4stroke engIne No kickback throwing props Absolutely no pee-detonation death 4stroke engines Much lower priced fuel & no rusty bearings commercial fuel ovailable RedMas Very low 9001000 rmp reliable idle end easy hand starts can control ignition timing will stop predetonation engine will run mudi cooler develop power Now available completely shielded spark plug lead 90 plug cover Chosen TLG ME g & Byron Origleals its outstanding reliability Send $100 price list newsletter ordering Box 1732 CH Electronics IflCe Riverton WY 82501 307 857-6897 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1988/04
Page Numbers: 34, 35, 36, 37, 38, 39, 41, 133
Ken Flaglor Gee Bee Model Y MY FIRST GEE BEE model built 1975 time have built three Model Ys two model too spent day Ken Model Y found best- have quarter-scale size saw beautiful machine photographing flying model ever piloted Since Ken Flaglors replica decided build aircraft inside out Im sure have pic After having covered history full-size plane month Americas premier Gee Bee model builder takes us through construction start finish four-channel radios 61 engine Part 2 2 EHenry Haffke Top After unfortunate crash its contest debut Haffke rebuilt latest Model V immaculate condition seen Except addition some minor detailing its ready competition again Above Left Hows documentation 1/5-size Gee Bee nes tles underneath Ken Flaglors replica 1985 Nats Above Right beautiful front end what gives model great part Its appeal As model lacks brace wires oil cooler scoop spark plugs ignition wires pitot tube aileron balances appropriate prop 34 Model Aviation ture nut bolt screw can seen taking aircraft apart AMA Nats first held Springfield MA flown three models various Gee Bees competition Springfield birthplace Gee Bees area childhood home well Nats scheduled again 1985 decided build two new Gee Bees competition Both would models Kens Model Y would Sport Scale other would ful ly detailed FAI Scale competition Using stack photos taken other research able produce good set scale drawings cut two sets parts put two fuselages together started cowls took over two months finish cowls dummy engines point realized would nev er get two models completed time Nats concentrated Sport Scale model spent some late nights getting ready good friend Sid Clement agreed test flying Sid master pilot has flown other Gee Bee creations didnt have Model Y quite finished Sunday before Nats Sid took out test flying installed Left The basic fuselage sides i/a-in balsa Note stab platform rear two sides plywood wing saddle doubler Right After first few bulkheads glued fuselage sides structure begins take Gee bees familiar barrel shape Left if youve got good eye may have noticed bulkhead shown plan forward cockpit early fuselage Right Top side stringers place bottom stringers will added after wing fuselage joined Left Details see include direction grain wing fillet bases rear fairing block wing hold down block fuel tank lo cation Right completed wing fairings built up blocks forward aft have 1/8-in planking over fairing bulkheads April 1988 35 Left After bottom stringers have glued place tall wheel installed shown Right Construction left wing panel has completed now ready final shaping sanding Note aluminum torque rod used actuate aileron Left After wing built aileron cut free trailing edge torque rod bolt will become servo crank sections nylon control horns embedded wood housings serve bearings Right center section contaIns required two aileron servos Left Tail surfaces built up starting %2 sheet balsa base adding %2 ribs edges both sides form realistic surface course simpler version could made cutting surfaces out 1A-ln sheet balsa Right completed landing gear assemblies main gear strut Note brass tube bushing axle gear strut fairings shown match Flaglors replica old 60 very reliable turned out non-Schnuerle engine didnt have quite enough power After several tempts get model unstuck tweaked engine max gave ship hefty shove Sid brought smoothly air made few turns handed transmitter saying doesnt need anything flew beautifully wasnt enough power maneuvers Sid discussed power situation new Webra 61 never run Sid felt would job hated change engines point since dummy engine made fit older 60 next night ran Webra couple hours test stand stalled Thanks Edson adjustable engine mount went easily got pleasant surprise dummy engine fit bet ter over Webra over orig inal engine muffler also fit no alterations took model across street flying field quite few folks flying got ready another test time everything flawless couldnt believe difference two en gines same displacement entire flight super landing good everything else returned shop spent rest night detailing didnt get everything wanted done felt model respectable enough take Nats Model Y en tered Sport Scale Gee Bee R-1 Gi ant Scale Model D FM However came time fly Model Y luck ran out out showing Ken Flaglor around Gee Bee coun 36 Model Aviation try night before models static judged went out early next day assembled Model Y took some pictures Kens replica model together got flight line Model Y eager fly since done beautifully test As soon started takeoff run knew some thing wrong model jumped air bounced back down lifted off lurched air corrected cor rected again fought steer over grass edge runway few sec onds later thanks radio failure completely out control rolled over its back fought upright went spin hit ground mightily disappointed big gest jolt yet come static scores posted found Model Y earned highest static score event 97 didnt get chance start repair job over six months rebuild front fuselage wing panel radio being repaired middle contest season flew three contests repaired Model Y still gun-shy events Nats did poor job flying Gee Bee first two events still managed come second third contest comfortable again flew model way should flown took first wide margin short time have model have enjoyed immensely Im looking forward flying will future plans presented include details building Model Y variants first Model Y NRl 1049 ring cowl its shown Plate 3 drawings landing gear aircraft differed others Dashed lines fuse lage drawing show variation aft end tail skid rather faired tail wheel second Model Y NR7 1 8Y two distinct configurations original smooth cowl open gear fairings plane appeared Chi cago Air Races 1933 bump cowl long windshield fully faired landing gear legs Ken Flaglors replica NR7l8L main subject drawings details shown aircrafl string ers ribs exactly scale markings shown exact positions appear relation ribs stringers Correct colors aircraft follows NRl 1049 white red trim black pinstripe separating colors NR7l8Y original cream red trim black pinstripeNR7l8Y 1933 white red trim black pinstripe NR7l8L cream red trim black pinstripe Choose version cut out parts start construction Fuselage Prepare %-in fuselage sides marked drawing small arrows Note platform stabilizer added top aft end building NRl 1049 will note slight difference front end sides shown Plate 3 drawings Also note forward fuselage bulkheads different shown next drawing fuselage front end ply fuselage doublers laminated basic sides extend F-6 front end sides sure make right left side Start fuselage structure gluing A-in ply F-3 -in balsa F-2 bulk heads place Make sure keep thing square point let assembly dry completely before pro ceeding remaining fuselage bulkheads added now tail brought together joined Install top bottom center stringers alternate remaining stringers gluing one side matching stringer other side progress Prepare firewall mounting en gine making required holes fuel lines throttle linkage Locate firewall against F-2 dont install yet Make compartment fuel tank between F-2 F-3 install tank top front fuselage can now sheeted planked A-in balsa prefer planking sheeting works well no compound curves completes basic fuselage structure cowl built assembling series rings have cut mateThe completed cowl after addition crankcase blank consists three layers rocker bumps Filler forms smooth fillets -in balsa cylinder bottoms have around bumps Notches visible inside traced onto blank areas cowl necessary proper cylinder fit cut out accommodate cylinder halves April 1988 37 Left Two sets cowl parts seen cowl frame has assembled other spread out show pieces top row front rings contains two balsa rings ply ring lower row contains two ply rings four spacers Above planked cowl left has sanded its final shape shaped cowl some rocker arm bump blanks has shaped Youll need 18 rocker bumps rials shown plans Glue C-i C-2 C-3 together glue C-4 C-5 other two sets rings joined A-in-sq balsa strips cut length shown pians Note slight taper front back cowl Make sure keep taper glue A-in-sq bal sa joiners place good idea build cardboard jig keep shape during assembly Trace side view cowl cardboard making two patterns Join 900 angle other cutting slot halfway front back side sliding together Using line up structure will assure proper shape Allow cowl structure dry completely before planking A-in balsa strips built dummy engine before planking cowl got thing fit perfectly before doing planking can build entire front end engine secured firewall dummy engine place cowl lined up attached firewall sheet metal screws through mounting tabs C-4 After completing unit firewall can fitted front fuselage epoxied place against F-2 Doing way allows line up perfect fit cowl fuselage After planking cowl carve sand final shape before adding cowl bumps time-consuming bumps go around front cowl curve must carefully fitted place cut blanks bumps band saw carved rough sanded tops shape before gluing place cowl have built dummy engine can glue bumps exact ly belong top side of cylinders cowl completed bumps place final sanding finishing can done cowl dummy engine assembly big job feel impressive part model dummy engine have done really much work Make crankcase gluing three layers A-in balsa together per patterns shown Use Wasp cylinders Williams Brothers using front half cylinder Draw curve tracing bot tom cylinder nine flat sides crankcase Cut away wood inside curves cylinder halves will fit Shape crankcase fit engine making necessary cutouts carburetor needle valve fits properly cylinders can epox ied place cutout crankcase drying 18 pushrods can cut proper length %-in birch dowel stock Make point end pushrod can pushed crankcase Sand pushrods smooth tack glue piece scrap balsa painting much easier trying paint after assembling dummy engine will want make two cylind ers removable allow cooling air come over engine flight done gluing plywood curve between two cyl inders side missing ones making up two removable cylinders ply insert behind cylinder see plans detail sheet metal screw through ply curve ply insert behind cylinder will hold place model display Wing Cut ribs proper material stack short pieces spar stock Sand stack ribs final shape Select hard balsa spars Make two spacer blocks scrap material 7 8 long support spars during wing construction Mark rib locations spar After sliding ribs onto spars support spars spacer blocks placed between two A- 1 ribs other between Rib D Rib E ribs proper positions glue place Glue 12-in piece square leading edge notches front rib Cut A-in trailing edge shape aileron block notch ribs Glue place Cut down 1 x %-in trailing edge stock 1% width glue place between ribs B Cut tip parts hard A-in balsa glue place Add x %-in tip rib braces Using couple pieces scrap A6 sheet spacers tack glue A-in aileron lead ing edge wing structure Glue 3/ aileron base leading edge Glue half ribs top bottom aileron base Add A-in ply plates top bottom wing brace wire top wing compression struts Make up landing gear mount blocks /l6 ply parts epoxy place wing panel can now sanded its final shape Cut aileron free wing structure glue %-in triangle pieces top bottom trailing edge between ribs B F Carve leading edge ailer round shape Install pine block inboard end aileron leading edge Carefully drill take end aluminum torque rod Make A-in ply bushings torque rods glue place ribs A-I B shown plans Make up A-in aluminum torque rod fit aileron Drill through pine block torque rod underside secure sheet metal screw Fit brass tube wire hinge other end aileron wing tip Build other wing panel just did first except build upside down spacer blocks over plans both panels finished can joined dihedral braces Test fit braces two panels together make sure perfect fit joint before gluing Use ep oxy glue panels together block up wing tips two blocks equal height between ribs tip will keep panels properly aligned epoxy sets panels dry center section can sheeted Y32 balsa Fit wing mount block between ply fuselage doublers epoxy place using %-in ply mount supports side Fit wing fuselage after installing dowel wing leading edge Drill tap wing block nylon bolt Fit wing faking block between wing trailing edge F-7 38 Model Aviation First crankcase shaped cut out accept 61 engine Williams Bros plastic cylinders glued place Back dummy engine has ply curve used hold removable cylinders Complete dummy engine except pushrods spark plugs Ignition wires fuselage can now completed addition rear bottom stringers tail wheel mount Also add %-in ply strut mount plates tail surfaces can simply cut A-in sheet balsa can built up prefer build up tail surfaces did cut base parts 34 hard balsa Add ribs outer edge parts same mate rial both top bottom base surfaces sand final shape Make A-in ply hinges shown plans realistic tail can course use favorite hinging system place shown Use joiner horn elevators An aluminum horn can installed rud der shown Wing fairing Cut two fillet bases A6 ply grain running crosswise length fillet base l2/ x 2 Fit base wing fairing block behind wing Assemble wing loosely fuselage Insert fillet bases between saddle wing Glue saddle making sure dont get glue wing Tighten wing down hold fillet bases place until glue dries Cut h-in balsa fillet blocks shown side view fuselage fill tween fuselage outer edges fillet bases blocks Fit fuselage curve wing/fuselage joint Allow glue dry completely carve sand proper shape Cut three wing fillet formers A-in balsa glue place between front rear fillet blocks Glue three other side well former should against rear front fillet block other two spaced evenly point rear fillet block Sheet plank fil let between front rear blocks Sand final shape dry Landing gear fafrings Refer front view landing gear fairing cut required parts proper materials Laminate parts together weight heavily hold place glue sets Install locating dowel front rear set wheel fairings Tack glue two fairing halves together carve sand shape After shaped fairings fit ted landing gear wires tack glued place Mount radio components areas shown plans according manufacturers instructions servos rudder elevator throttle can mount ed %-in ply tray screwed rails along inside fuselage sides rudder servo should mounted center three using cables connecting rudder will scale installed aluminum rudder horn An arrow shaft pushrod used elevator flexible pushrod throttle Two servos should used ailerons quite large Servos connected receiver cable battery can located beside fuel tank receiver can go under servo tray fuselage switch can mounted aft end servo tray can reached through cockpit Finishing ways finish April 1988 39 Glue /8-in-dowel dummy pushrods block wood make easier paint Lacking addition fuel tank cap fuel gauge make complete re built model ready contest circuit again model always does well static scoring finished dummy engine inside com pleted cowl finished seamless cowl looks like molded fiberglass true scale though thats exactly what Flaglor used replica Model V close look pitot tube lower brace wires spreader bar open landing gear fairings cant pick out picture spreader bars natural wood finish model Scale model type fa bric covering will realistic choice gave entire structure coat Balsarite used Coverites Permagloss material available correct shade cream Permagloss woven fab ric material same composition used full-size aircraft lighter weight prepainted fully finished comes off roll Permagloss gives realistic fabric look finished model results lighter finish could get paint Perma gloss also very durable impervious fuel solvents masked off trim areas gave coat Primex prepares Permagloss painting gives much better adhesion also enhan ces gloss painted trim used Black Baron Epoxy trim sprayed coat Black Baron Clear over once trim cured Registration numbers cut Coy erite Trimsheet material applied exact position shown plans Rudder numbers also cut Trimsheet material Coverite Pinstripes used outline registration numbers wing rudder racing number 7 fuselage sides Gee Bee logo fin cut black Trimsheet material printing rudder below registra tion numbers hand lettered draft ing pen given coat clear fuel-proof ink Built Ken Flaglor lettering left side fu selage under stab hand painted flying landing wires made elastic cord add final touch detailing cord threaded through wing wheel fairings made remov able fuselage connect point made oval plate three holes wires knotted behind plate small rectangular balsa block epoxied behind plate hook installed balsa block fuselage opening cut block fit wire hook pulls rubberbands looped around hook first plate through fuselage over hook second plate Flying full-size Gee Bee Model Ys wonderful flying aircraft Kens magnificent replica racing planes people believe high-performance sport aircraft NR1 1049 won national aerobatics title 1932 pi loted Russell Boardman model flies better RC Scale model experience built straight balanced shown plans will surprise its fine flying characteristics find its performance superior quarter-scale Model Ys Ive built model will start its takeoff roll very little rudder needed keep going straight tail will come up after short run slight back pressure stick will bring gently off ground modContinued page 133 SCAL RADIO CONTROL 8W Nt EWH CONTROL-UNE 000 VINTAGESMOOTHGOLDEN AGENEW sizes2/CONTOURsizes2/BALLOON 31/i"234 3/s 133/4131/4 13%2hz4/z 11443/i11/4311/443/g31451/4 11/2511/24141145334 1/61/i214514l7/a6h SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS 4LL1AMS Send $3 fully Illustrated catalog other kite accessorIes in~ DEPTMA PAWNEE ST SAN MARCOS CA 9 New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows walk yet Fully Aerobatic Complete Kit 89~ 56 wing 40 Length 40 Engine 4 lbs 4 CH Tiger Tail 4 New Deluxe Kit 16495 Fiber Glass Fuse & Belly Pan Foam wing & Stab Balsa & Plywood 72 wing Cajus RIC Pmducts 800 sq 112 Rosie SI Latayelte LA 70508 318 232-7446 Dealer inqutries invited April 1988 41 EELS FREE-FLIGHT Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Belly Pan Foam wing & Hwd Ask about Kit & Eng Combos NO MORE KICKBACKS THROWN PROPS popular best selling odd-on ignition system world Convert engine spark ignition breakerless capacitive discharge Ignition System can installed engines 60 up both 2 & 4 stroke both single & twin cylinders 4-strokers run absolutely beautiful ignition lOto 30% power 4stroke engIne No kickback throwing props Absolutely no pee-detonation death 4stroke engines Much lower priced fuel & no rusty bearings commercial fuel ovailable RedMas Very low 9001000 rmp reliable idle end easy hand starts can control ignition timing will stop predetonation engine will run mudi cooler develop power Now available completely shielded spark plug lead 90 plug cover Chosen TLG ME g & Byron Origleals its outstanding reliability Send $100 price list newsletter ordering Box 1732 CH Electronics IflCe Riverton WY 82501 307 857-6897 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1988/04
Page Numbers: 34, 35, 36, 37, 38, 39, 41, 133
Ken Flaglor Gee Bee Model Y MY FIRST GEE BEE model built 1975 time have built three Model Ys two model too spent day Ken Model Y found best- have quarter-scale size saw beautiful machine photographing flying model ever piloted Since Ken Flaglors replica decided build aircraft inside out Im sure have pic After having covered history full-size plane month Americas premier Gee Bee model builder takes us through construction start finish four-channel radios 61 engine Part 2 2 EHenry Haffke Top After unfortunate crash its contest debut Haffke rebuilt latest Model V immaculate condition seen Except addition some minor detailing its ready competition again Above Left Hows documentation 1/5-size Gee Bee nes tles underneath Ken Flaglors replica 1985 Nats Above Right beautiful front end what gives model great part Its appeal As model lacks brace wires oil cooler scoop spark plugs ignition wires pitot tube aileron balances appropriate prop 34 Model Aviation ture nut bolt screw can seen taking aircraft apart AMA Nats first held Springfield MA flown three models various Gee Bees competition Springfield birthplace Gee Bees area childhood home well Nats scheduled again 1985 decided build two new Gee Bees competition Both would models Kens Model Y would Sport Scale other would ful ly detailed FAI Scale competition Using stack photos taken other research able produce good set scale drawings cut two sets parts put two fuselages together started cowls took over two months finish cowls dummy engines point realized would nev er get two models completed time Nats concentrated Sport Scale model spent some late nights getting ready good friend Sid Clement agreed test flying Sid master pilot has flown other Gee Bee creations didnt have Model Y quite finished Sunday before Nats Sid took out test flying installed Left The basic fuselage sides i/a-in balsa Note stab platform rear two sides plywood wing saddle doubler Right After first few bulkheads glued fuselage sides structure begins take Gee bees familiar barrel shape Left if youve got good eye may have noticed bulkhead shown plan forward cockpit early fuselage Right Top side stringers place bottom stringers will added after wing fuselage joined Left Details see include direction grain wing fillet bases rear fairing block wing hold down block fuel tank lo cation Right completed wing fairings built up blocks forward aft have 1/8-in planking over fairing bulkheads April 1988 35 Left After bottom stringers have glued place tall wheel installed shown Right Construction left wing panel has completed now ready final shaping sanding Note aluminum torque rod used actuate aileron Left After wing built aileron cut free trailing edge torque rod bolt will become servo crank sections nylon control horns embedded wood housings serve bearings Right center section contaIns required two aileron servos Left Tail surfaces built up starting %2 sheet balsa base adding %2 ribs edges both sides form realistic surface course simpler version could made cutting surfaces out 1A-ln sheet balsa Right completed landing gear assemblies main gear strut Note brass tube bushing axle gear strut fairings shown match Flaglors replica old 60 very reliable turned out non-Schnuerle engine didnt have quite enough power After several tempts get model unstuck tweaked engine max gave ship hefty shove Sid brought smoothly air made few turns handed transmitter saying doesnt need anything flew beautifully wasnt enough power maneuvers Sid discussed power situation new Webra 61 never run Sid felt would job hated change engines point since dummy engine made fit older 60 next night ran Webra couple hours test stand stalled Thanks Edson adjustable engine mount went easily got pleasant surprise dummy engine fit bet ter over Webra over orig inal engine muffler also fit no alterations took model across street flying field quite few folks flying got ready another test time everything flawless couldnt believe difference two en gines same displacement entire flight super landing good everything else returned shop spent rest night detailing didnt get everything wanted done felt model respectable enough take Nats Model Y en tered Sport Scale Gee Bee R-1 Gi ant Scale Model D FM However came time fly Model Y luck ran out out showing Ken Flaglor around Gee Bee coun 36 Model Aviation try night before models static judged went out early next day assembled Model Y took some pictures Kens replica model together got flight line Model Y eager fly since done beautifully test As soon started takeoff run knew some thing wrong model jumped air bounced back down lifted off lurched air corrected cor rected again fought steer over grass edge runway few sec onds later thanks radio failure completely out control rolled over its back fought upright went spin hit ground mightily disappointed big gest jolt yet come static scores posted found Model Y earned highest static score event 97 didnt get chance start repair job over six months rebuild front fuselage wing panel radio being repaired middle contest season flew three contests repaired Model Y still gun-shy events Nats did poor job flying Gee Bee first two events still managed come second third contest comfortable again flew model way should flown took first wide margin short time have model have enjoyed immensely Im looking forward flying will future plans presented include details building Model Y variants first Model Y NRl 1049 ring cowl its shown Plate 3 drawings landing gear aircraft differed others Dashed lines fuse lage drawing show variation aft end tail skid rather faired tail wheel second Model Y NR7 1 8Y two distinct configurations original smooth cowl open gear fairings plane appeared Chi cago Air Races 1933 bump cowl long windshield fully faired landing gear legs Ken Flaglors replica NR7l8L main subject drawings details shown aircrafl string ers ribs exactly scale markings shown exact positions appear relation ribs stringers Correct colors aircraft follows NRl 1049 white red trim black pinstripe separating colors NR7l8Y original cream red trim black pinstripeNR7l8Y 1933 white red trim black pinstripe NR7l8L cream red trim black pinstripe Choose version cut out parts start construction Fuselage Prepare %-in fuselage sides marked drawing small arrows Note platform stabilizer added top aft end building NRl 1049 will note slight difference front end sides shown Plate 3 drawings Also note forward fuselage bulkheads different shown next drawing fuselage front end ply fuselage doublers laminated basic sides extend F-6 front end sides sure make right left side Start fuselage structure gluing A-in ply F-3 -in balsa F-2 bulk heads place Make sure keep thing square point let assembly dry completely before pro ceeding remaining fuselage bulkheads added now tail brought together joined Install top bottom center stringers alternate remaining stringers gluing one side matching stringer other side progress Prepare firewall mounting en gine making required holes fuel lines throttle linkage Locate firewall against F-2 dont install yet Make compartment fuel tank between F-2 F-3 install tank top front fuselage can now sheeted planked A-in balsa prefer planking sheeting works well no compound curves completes basic fuselage structure cowl built assembling series rings have cut mateThe completed cowl after addition crankcase blank consists three layers rocker bumps Filler forms smooth fillets -in balsa cylinder bottoms have around bumps Notches visible inside traced onto blank areas cowl necessary proper cylinder fit cut out accommodate cylinder halves April 1988 37 Left Two sets cowl parts seen cowl frame has assembled other spread out show pieces top row front rings contains two balsa rings ply ring lower row contains two ply rings four spacers Above planked cowl left has sanded its final shape shaped cowl some rocker arm bump blanks has shaped Youll need 18 rocker bumps rials shown plans Glue C-i C-2 C-3 together glue C-4 C-5 other two sets rings joined A-in-sq balsa strips cut length shown pians Note slight taper front back cowl Make sure keep taper glue A-in-sq bal sa joiners place good idea build cardboard jig keep shape during assembly Trace side view cowl cardboard making two patterns Join 900 angle other cutting slot halfway front back side sliding together Using line up structure will assure proper shape Allow cowl structure dry completely before planking A-in balsa strips built dummy engine before planking cowl got thing fit perfectly before doing planking can build entire front end engine secured firewall dummy engine place cowl lined up attached firewall sheet metal screws through mounting tabs C-4 After completing unit firewall can fitted front fuselage epoxied place against F-2 Doing way allows line up perfect fit cowl fuselage After planking cowl carve sand final shape before adding cowl bumps time-consuming bumps go around front cowl curve must carefully fitted place cut blanks bumps band saw carved rough sanded tops shape before gluing place cowl have built dummy engine can glue bumps exact ly belong top side of cylinders cowl completed bumps place final sanding finishing can done cowl dummy engine assembly big job feel impressive part model dummy engine have done really much work Make crankcase gluing three layers A-in balsa together per patterns shown Use Wasp cylinders Williams Brothers using front half cylinder Draw curve tracing bot tom cylinder nine flat sides crankcase Cut away wood inside curves cylinder halves will fit Shape crankcase fit engine making necessary cutouts carburetor needle valve fits properly cylinders can epox ied place cutout crankcase drying 18 pushrods can cut proper length %-in birch dowel stock Make point end pushrod can pushed crankcase Sand pushrods smooth tack glue piece scrap balsa painting much easier trying paint after assembling dummy engine will want make two cylind ers removable allow cooling air come over engine flight done gluing plywood curve between two cyl inders side missing ones making up two removable cylinders ply insert behind cylinder see plans detail sheet metal screw through ply curve ply insert behind cylinder will hold place model display Wing Cut ribs proper material stack short pieces spar stock Sand stack ribs final shape Select hard balsa spars Make two spacer blocks scrap material 7 8 long support spars during wing construction Mark rib locations spar After sliding ribs onto spars support spars spacer blocks placed between two A- 1 ribs other between Rib D Rib E ribs proper positions glue place Glue 12-in piece square leading edge notches front rib Cut A-in trailing edge shape aileron block notch ribs Glue place Cut down 1 x %-in trailing edge stock 1% width glue place between ribs B Cut tip parts hard A-in balsa glue place Add x %-in tip rib braces Using couple pieces scrap A6 sheet spacers tack glue A-in aileron lead ing edge wing structure Glue 3/ aileron base leading edge Glue half ribs top bottom aileron base Add A-in ply plates top bottom wing brace wire top wing compression struts Make up landing gear mount blocks /l6 ply parts epoxy place wing panel can now sanded its final shape Cut aileron free wing structure glue %-in triangle pieces top bottom trailing edge between ribs B F Carve leading edge ailer round shape Install pine block inboard end aileron leading edge Carefully drill take end aluminum torque rod Make A-in ply bushings torque rods glue place ribs A-I B shown plans Make up A-in aluminum torque rod fit aileron Drill through pine block torque rod underside secure sheet metal screw Fit brass tube wire hinge other end aileron wing tip Build other wing panel just did first except build upside down spacer blocks over plans both panels finished can joined dihedral braces Test fit braces two panels together make sure perfect fit joint before gluing Use ep oxy glue panels together block up wing tips two blocks equal height between ribs tip will keep panels properly aligned epoxy sets panels dry center section can sheeted Y32 balsa Fit wing mount block between ply fuselage doublers epoxy place using %-in ply mount supports side Fit wing fuselage after installing dowel wing leading edge Drill tap wing block nylon bolt Fit wing faking block between wing trailing edge F-7 38 Model Aviation First crankcase shaped cut out accept 61 engine Williams Bros plastic cylinders glued place Back dummy engine has ply curve used hold removable cylinders Complete dummy engine except pushrods spark plugs Ignition wires fuselage can now completed addition rear bottom stringers tail wheel mount Also add %-in ply strut mount plates tail surfaces can simply cut A-in sheet balsa can built up prefer build up tail surfaces did cut base parts 34 hard balsa Add ribs outer edge parts same mate rial both top bottom base surfaces sand final shape Make A-in ply hinges shown plans realistic tail can course use favorite hinging system place shown Use joiner horn elevators An aluminum horn can installed rud der shown Wing fairing Cut two fillet bases A6 ply grain running crosswise length fillet base l2/ x 2 Fit base wing fairing block behind wing Assemble wing loosely fuselage Insert fillet bases between saddle wing Glue saddle making sure dont get glue wing Tighten wing down hold fillet bases place until glue dries Cut h-in balsa fillet blocks shown side view fuselage fill tween fuselage outer edges fillet bases blocks Fit fuselage curve wing/fuselage joint Allow glue dry completely carve sand proper shape Cut three wing fillet formers A-in balsa glue place between front rear fillet blocks Glue three other side well former should against rear front fillet block other two spaced evenly point rear fillet block Sheet plank fil let between front rear blocks Sand final shape dry Landing gear fafrings Refer front view landing gear fairing cut required parts proper materials Laminate parts together weight heavily hold place glue sets Install locating dowel front rear set wheel fairings Tack glue two fairing halves together carve sand shape After shaped fairings fit ted landing gear wires tack glued place Mount radio components areas shown plans according manufacturers instructions servos rudder elevator throttle can mount ed %-in ply tray screwed rails along inside fuselage sides rudder servo should mounted center three using cables connecting rudder will scale installed aluminum rudder horn An arrow shaft pushrod used elevator flexible pushrod throttle Two servos should used ailerons quite large Servos connected receiver cable battery can located beside fuel tank receiver can go under servo tray fuselage switch can mounted aft end servo tray can reached through cockpit Finishing ways finish April 1988 39 Glue /8-in-dowel dummy pushrods block wood make easier paint Lacking addition fuel tank cap fuel gauge make complete re built model ready contest circuit again model always does well static scoring finished dummy engine inside com pleted cowl finished seamless cowl looks like molded fiberglass true scale though thats exactly what Flaglor used replica Model V close look pitot tube lower brace wires spreader bar open landing gear fairings cant pick out picture spreader bars natural wood finish model Scale model type fa bric covering will realistic choice gave entire structure coat Balsarite used Coverites Permagloss material available correct shade cream Permagloss woven fab ric material same composition used full-size aircraft lighter weight prepainted fully finished comes off roll Permagloss gives realistic fabric look finished model results lighter finish could get paint Perma gloss also very durable impervious fuel solvents masked off trim areas gave coat Primex prepares Permagloss painting gives much better adhesion also enhan ces gloss painted trim used Black Baron Epoxy trim sprayed coat Black Baron Clear over once trim cured Registration numbers cut Coy erite Trimsheet material applied exact position shown plans Rudder numbers also cut Trimsheet material Coverite Pinstripes used outline registration numbers wing rudder racing number 7 fuselage sides Gee Bee logo fin cut black Trimsheet material printing rudder below registra tion numbers hand lettered draft ing pen given coat clear fuel-proof ink Built Ken Flaglor lettering left side fu selage under stab hand painted flying landing wires made elastic cord add final touch detailing cord threaded through wing wheel fairings made remov able fuselage connect point made oval plate three holes wires knotted behind plate small rectangular balsa block epoxied behind plate hook installed balsa block fuselage opening cut block fit wire hook pulls rubberbands looped around hook first plate through fuselage over hook second plate Flying full-size Gee Bee Model Ys wonderful flying aircraft Kens magnificent replica racing planes people believe high-performance sport aircraft NR1 1049 won national aerobatics title 1932 pi loted Russell Boardman model flies better RC Scale model experience built straight balanced shown plans will surprise its fine flying characteristics find its performance superior quarter-scale Model Ys Ive built model will start its takeoff roll very little rudder needed keep going straight tail will come up after short run slight back pressure stick will bring gently off ground modContinued page 133 SCAL RADIO CONTROL 8W Nt EWH CONTROL-UNE 000 VINTAGESMOOTHGOLDEN AGENEW sizes2/CONTOURsizes2/BALLOON 31/i"234 3/s 133/4131/4 13%2hz4/z 11443/i11/4311/443/g31451/4 11/2511/24141145334 1/61/i214514l7/a6h SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS 4LL1AMS Send $3 fully Illustrated catalog other kite accessorIes in~ DEPTMA PAWNEE ST SAN MARCOS CA 9 New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows walk yet Fully Aerobatic Complete Kit 89~ 56 wing 40 Length 40 Engine 4 lbs 4 CH Tiger Tail 4 New Deluxe Kit 16495 Fiber Glass Fuse & Belly Pan Foam wing & Stab Balsa & Plywood 72 wing Cajus RIC Pmducts 800 sq 112 Rosie SI Latayelte LA 70508 318 232-7446 Dealer inqutries invited April 1988 41 EELS FREE-FLIGHT Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Belly Pan Foam wing & Hwd Ask about Kit & Eng Combos NO MORE KICKBACKS THROWN PROPS popular best selling odd-on ignition system world Convert engine spark ignition breakerless capacitive discharge Ignition System can installed engines 60 up both 2 & 4 stroke both single & twin cylinders 4-strokers run absolutely beautiful ignition lOto 30% power 4stroke engIne No kickback throwing props Absolutely no pee-detonation death 4stroke engines Much lower priced fuel & no rusty bearings commercial fuel ovailable RedMas Very low 9001000 rmp reliable idle end easy hand starts can control ignition timing will stop predetonation engine will run mudi cooler develop power Now available completely shielded spark plug lead 90 plug cover Chosen TLG ME g & Byron Origleals its outstanding reliability Send $100 price list newsletter ordering Box 1732 CH Electronics IflCe Riverton WY 82501 307 857-6897 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1988/04
Page Numbers: 34, 35, 36, 37, 38, 39, 41, 133
Ken Flaglor Gee Bee Model Y MY FIRST GEE BEE model built 1975 time have built three Model Ys two model too spent day Ken Model Y found best- have quarter-scale size saw beautiful machine photographing flying model ever piloted Since Ken Flaglors replica decided build aircraft inside out Im sure have pic After having covered history full-size plane month Americas premier Gee Bee model builder takes us through construction start finish four-channel radios 61 engine Part 2 2 EHenry Haffke Top After unfortunate crash its contest debut Haffke rebuilt latest Model V immaculate condition seen Except addition some minor detailing its ready competition again Above Left Hows documentation 1/5-size Gee Bee nes tles underneath Ken Flaglors replica 1985 Nats Above Right beautiful front end what gives model great part Its appeal As model lacks brace wires oil cooler scoop spark plugs ignition wires pitot tube aileron balances appropriate prop 34 Model Aviation ture nut bolt screw can seen taking aircraft apart AMA Nats first held Springfield MA flown three models various Gee Bees competition Springfield birthplace Gee Bees area childhood home well Nats scheduled again 1985 decided build two new Gee Bees competition Both would models Kens Model Y would Sport Scale other would ful ly detailed FAI Scale competition Using stack photos taken other research able produce good set scale drawings cut two sets parts put two fuselages together started cowls took over two months finish cowls dummy engines point realized would nev er get two models completed time Nats concentrated Sport Scale model spent some late nights getting ready good friend Sid Clement agreed test flying Sid master pilot has flown other Gee Bee creations didnt have Model Y quite finished Sunday before Nats Sid took out test flying installed Left The basic fuselage sides i/a-in balsa Note stab platform rear two sides plywood wing saddle doubler Right After first few bulkheads glued fuselage sides structure begins take Gee bees familiar barrel shape Left if youve got good eye may have noticed bulkhead shown plan forward cockpit early fuselage Right Top side stringers place bottom stringers will added after wing fuselage joined Left Details see include direction grain wing fillet bases rear fairing block wing hold down block fuel tank lo cation Right completed wing fairings built up blocks forward aft have 1/8-in planking over fairing bulkheads April 1988 35 Left After bottom stringers have glued place tall wheel installed shown Right Construction left wing panel has completed now ready final shaping sanding Note aluminum torque rod used actuate aileron Left After wing built aileron cut free trailing edge torque rod bolt will become servo crank sections nylon control horns embedded wood housings serve bearings Right center section contaIns required two aileron servos Left Tail surfaces built up starting %2 sheet balsa base adding %2 ribs edges both sides form realistic surface course simpler version could made cutting surfaces out 1A-ln sheet balsa Right completed landing gear assemblies main gear strut Note brass tube bushing axle gear strut fairings shown match Flaglors replica old 60 very reliable turned out non-Schnuerle engine didnt have quite enough power After several tempts get model unstuck tweaked engine max gave ship hefty shove Sid brought smoothly air made few turns handed transmitter saying doesnt need anything flew beautifully wasnt enough power maneuvers Sid discussed power situation new Webra 61 never run Sid felt would job hated change engines point since dummy engine made fit older 60 next night ran Webra couple hours test stand stalled Thanks Edson adjustable engine mount went easily got pleasant surprise dummy engine fit bet ter over Webra over orig inal engine muffler also fit no alterations took model across street flying field quite few folks flying got ready another test time everything flawless couldnt believe difference two en gines same displacement entire flight super landing good everything else returned shop spent rest night detailing didnt get everything wanted done felt model respectable enough take Nats Model Y en tered Sport Scale Gee Bee R-1 Gi ant Scale Model D FM However came time fly Model Y luck ran out out showing Ken Flaglor around Gee Bee coun 36 Model Aviation try night before models static judged went out early next day assembled Model Y took some pictures Kens replica model together got flight line Model Y eager fly since done beautifully test As soon started takeoff run knew some thing wrong model jumped air bounced back down lifted off lurched air corrected cor rected again fought steer over grass edge runway few sec onds later thanks radio failure completely out control rolled over its back fought upright went spin hit ground mightily disappointed big gest jolt yet come static scores posted found Model Y earned highest static score event 97 didnt get chance start repair job over six months rebuild front fuselage wing panel radio being repaired middle contest season flew three contests repaired Model Y still gun-shy events Nats did poor job flying Gee Bee first two events still managed come second third contest comfortable again flew model way should flown took first wide margin short time have model have enjoyed immensely Im looking forward flying will future plans presented include details building Model Y variants first Model Y NRl 1049 ring cowl its shown Plate 3 drawings landing gear aircraft differed others Dashed lines fuse lage drawing show variation aft end tail skid rather faired tail wheel second Model Y NR7 1 8Y two distinct configurations original smooth cowl open gear fairings plane appeared Chi cago Air Races 1933 bump cowl long windshield fully faired landing gear legs Ken Flaglors replica NR7l8L main subject drawings details shown aircrafl string ers ribs exactly scale markings shown exact positions appear relation ribs stringers Correct colors aircraft follows NRl 1049 white red trim black pinstripe separating colors NR7l8Y original cream red trim black pinstripeNR7l8Y 1933 white red trim black pinstripe NR7l8L cream red trim black pinstripe Choose version cut out parts start construction Fuselage Prepare %-in fuselage sides marked drawing small arrows Note platform stabilizer added top aft end building NRl 1049 will note slight difference front end sides shown Plate 3 drawings Also note forward fuselage bulkheads different shown next drawing fuselage front end ply fuselage doublers laminated basic sides extend F-6 front end sides sure make right left side Start fuselage structure gluing A-in ply F-3 -in balsa F-2 bulk heads place Make sure keep thing square point let assembly dry completely before pro ceeding remaining fuselage bulkheads added now tail brought together joined Install top bottom center stringers alternate remaining stringers gluing one side matching stringer other side progress Prepare firewall mounting en gine making required holes fuel lines throttle linkage Locate firewall against F-2 dont install yet Make compartment fuel tank between F-2 F-3 install tank top front fuselage can now sheeted planked A-in balsa prefer planking sheeting works well no compound curves completes basic fuselage structure cowl built assembling series rings have cut mateThe completed cowl after addition crankcase blank consists three layers rocker bumps Filler forms smooth fillets -in balsa cylinder bottoms have around bumps Notches visible inside traced onto blank areas cowl necessary proper cylinder fit cut out accommodate cylinder halves April 1988 37 Left Two sets cowl parts seen cowl frame has assembled other spread out show pieces top row front rings contains two balsa rings ply ring lower row contains two ply rings four spacers Above planked cowl left has sanded its final shape shaped cowl some rocker arm bump blanks has shaped Youll need 18 rocker bumps rials shown plans Glue C-i C-2 C-3 together glue C-4 C-5 other two sets rings joined A-in-sq balsa strips cut length shown pians Note slight taper front back cowl Make sure keep taper glue A-in-sq bal sa joiners place good idea build cardboard jig keep shape during assembly Trace side view cowl cardboard making two patterns Join 900 angle other cutting slot halfway front back side sliding together Using line up structure will assure proper shape Allow cowl structure dry completely before planking A-in balsa strips built dummy engine before planking cowl got thing fit perfectly before doing planking can build entire front end engine secured firewall dummy engine place cowl lined up attached firewall sheet metal screws through mounting tabs C-4 After completing unit firewall can fitted front fuselage epoxied place against F-2 Doing way allows line up perfect fit cowl fuselage After planking cowl carve sand final shape before adding cowl bumps time-consuming bumps go around front cowl curve must carefully fitted place cut blanks bumps band saw carved rough sanded tops shape before gluing place cowl have built dummy engine can glue bumps exact ly belong top side of cylinders cowl completed bumps place final sanding finishing can done cowl dummy engine assembly big job feel impressive part model dummy engine have done really much work Make crankcase gluing three layers A-in balsa together per patterns shown Use Wasp cylinders Williams Brothers using front half cylinder Draw curve tracing bot tom cylinder nine flat sides crankcase Cut away wood inside curves cylinder halves will fit Shape crankcase fit engine making necessary cutouts carburetor needle valve fits properly cylinders can epox ied place cutout crankcase drying 18 pushrods can cut proper length %-in birch dowel stock Make point end pushrod can pushed crankcase Sand pushrods smooth tack glue piece scrap balsa painting much easier trying paint after assembling dummy engine will want make two cylind ers removable allow cooling air come over engine flight done gluing plywood curve between two cyl inders side missing ones making up two removable cylinders ply insert behind cylinder see plans detail sheet metal screw through ply curve ply insert behind cylinder will hold place model display Wing Cut ribs proper material stack short pieces spar stock Sand stack ribs final shape Select hard balsa spars Make two spacer blocks scrap material 7 8 long support spars during wing construction Mark rib locations spar After sliding ribs onto spars support spars spacer blocks placed between two A- 1 ribs other between Rib D Rib E ribs proper positions glue place Glue 12-in piece square leading edge notches front rib Cut A-in trailing edge shape aileron block notch ribs Glue place Cut down 1 x %-in trailing edge stock 1% width glue place between ribs B Cut tip parts hard A-in balsa glue place Add x %-in tip rib braces Using couple pieces scrap A6 sheet spacers tack glue A-in aileron lead ing edge wing structure Glue 3/ aileron base leading edge Glue half ribs top bottom aileron base Add A-in ply plates top bottom wing brace wire top wing compression struts Make up landing gear mount blocks /l6 ply parts epoxy place wing panel can now sanded its final shape Cut aileron free wing structure glue %-in triangle pieces top bottom trailing edge between ribs B F Carve leading edge ailer round shape Install pine block inboard end aileron leading edge Carefully drill take end aluminum torque rod Make A-in ply bushings torque rods glue place ribs A-I B shown plans Make up A-in aluminum torque rod fit aileron Drill through pine block torque rod underside secure sheet metal screw Fit brass tube wire hinge other end aileron wing tip Build other wing panel just did first except build upside down spacer blocks over plans both panels finished can joined dihedral braces Test fit braces two panels together make sure perfect fit joint before gluing Use ep oxy glue panels together block up wing tips two blocks equal height between ribs tip will keep panels properly aligned epoxy sets panels dry center section can sheeted Y32 balsa Fit wing mount block between ply fuselage doublers epoxy place using %-in ply mount supports side Fit wing fuselage after installing dowel wing leading edge Drill tap wing block nylon bolt Fit wing faking block between wing trailing edge F-7 38 Model Aviation First crankcase shaped cut out accept 61 engine Williams Bros plastic cylinders glued place Back dummy engine has ply curve used hold removable cylinders Complete dummy engine except pushrods spark plugs Ignition wires fuselage can now completed addition rear bottom stringers tail wheel mount Also add %-in ply strut mount plates tail surfaces can simply cut A-in sheet balsa can built up prefer build up tail surfaces did cut base parts 34 hard balsa Add ribs outer edge parts same mate rial both top bottom base surfaces sand final shape Make A-in ply hinges shown plans realistic tail can course use favorite hinging system place shown Use joiner horn elevators An aluminum horn can installed rud der shown Wing fairing Cut two fillet bases A6 ply grain running crosswise length fillet base l2/ x 2 Fit base wing fairing block behind wing Assemble wing loosely fuselage Insert fillet bases between saddle wing Glue saddle making sure dont get glue wing Tighten wing down hold fillet bases place until glue dries Cut h-in balsa fillet blocks shown side view fuselage fill tween fuselage outer edges fillet bases blocks Fit fuselage curve wing/fuselage joint Allow glue dry completely carve sand proper shape Cut three wing fillet formers A-in balsa glue place between front rear fillet blocks Glue three other side well former should against rear front fillet block other two spaced evenly point rear fillet block Sheet plank fil let between front rear blocks Sand final shape dry Landing gear fafrings Refer front view landing gear fairing cut required parts proper materials Laminate parts together weight heavily hold place glue sets Install locating dowel front rear set wheel fairings Tack glue two fairing halves together carve sand shape After shaped fairings fit ted landing gear wires tack glued place Mount radio components areas shown plans according manufacturers instructions servos rudder elevator throttle can mount ed %-in ply tray screwed rails along inside fuselage sides rudder servo should mounted center three using cables connecting rudder will scale installed aluminum rudder horn An arrow shaft pushrod used elevator flexible pushrod throttle Two servos should used ailerons quite large Servos connected receiver cable battery can located beside fuel tank receiver can go under servo tray fuselage switch can mounted aft end servo tray can reached through cockpit Finishing ways finish April 1988 39 Glue /8-in-dowel dummy pushrods block wood make easier paint Lacking addition fuel tank cap fuel gauge make complete re built model ready contest circuit again model always does well static scoring finished dummy engine inside com pleted cowl finished seamless cowl looks like molded fiberglass true scale though thats exactly what Flaglor used replica Model V close look pitot tube lower brace wires spreader bar open landing gear fairings cant pick out picture spreader bars natural wood finish model Scale model type fa bric covering will realistic choice gave entire structure coat Balsarite used Coverites Permagloss material available correct shade cream Permagloss woven fab ric material same composition used full-size aircraft lighter weight prepainted fully finished comes off roll Permagloss gives realistic fabric look finished model results lighter finish could get paint Perma gloss also very durable impervious fuel solvents masked off trim areas gave coat Primex prepares Permagloss painting gives much better adhesion also enhan ces gloss painted trim used Black Baron Epoxy trim sprayed coat Black Baron Clear over once trim cured Registration numbers cut Coy erite Trimsheet material applied exact position shown plans Rudder numbers also cut Trimsheet material Coverite Pinstripes used outline registration numbers wing rudder racing number 7 fuselage sides Gee Bee logo fin cut black Trimsheet material printing rudder below registra tion numbers hand lettered draft ing pen given coat clear fuel-proof ink Built Ken Flaglor lettering left side fu selage under stab hand painted flying landing wires made elastic cord add final touch detailing cord threaded through wing wheel fairings made remov able fuselage connect point made oval plate three holes wires knotted behind plate small rectangular balsa block epoxied behind plate hook installed balsa block fuselage opening cut block fit wire hook pulls rubberbands looped around hook first plate through fuselage over hook second plate Flying full-size Gee Bee Model Ys wonderful flying aircraft Kens magnificent replica racing planes people believe high-performance sport aircraft NR1 1049 won national aerobatics title 1932 pi loted Russell Boardman model flies better RC Scale model experience built straight balanced shown plans will surprise its fine flying characteristics find its performance superior quarter-scale Model Ys Ive built model will start its takeoff roll very little rudder needed keep going straight tail will come up after short run slight back pressure stick will bring gently off ground modContinued page 133 SCAL RADIO CONTROL 8W Nt EWH CONTROL-UNE 000 VINTAGESMOOTHGOLDEN AGENEW sizes2/CONTOURsizes2/BALLOON 31/i"234 3/s 133/4131/4 13%2hz4/z 11443/i11/4311/443/g31451/4 11/2511/24141145334 1/61/i214514l7/a6h SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS 4LL1AMS Send $3 fully Illustrated catalog other kite accessorIes in~ DEPTMA PAWNEE ST SAN MARCOS CA 9 New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows walk yet Fully Aerobatic Complete Kit 89~ 56 wing 40 Length 40 Engine 4 lbs 4 CH Tiger Tail 4 New Deluxe Kit 16495 Fiber Glass Fuse & Belly Pan Foam wing & Stab Balsa & Plywood 72 wing Cajus RIC Pmducts 800 sq 112 Rosie SI Latayelte LA 70508 318 232-7446 Dealer inqutries invited April 1988 41 EELS FREE-FLIGHT Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Belly Pan Foam wing & Hwd Ask about Kit & Eng Combos NO MORE KICKBACKS THROWN PROPS popular best selling odd-on ignition system world Convert engine spark ignition breakerless capacitive discharge Ignition System can installed engines 60 up both 2 & 4 stroke both single & twin cylinders 4-strokers run absolutely beautiful ignition lOto 30% power 4stroke engIne No kickback throwing props Absolutely no pee-detonation death 4stroke engines Much lower priced fuel & no rusty bearings commercial fuel ovailable RedMas Very low 9001000 rmp reliable idle end easy hand starts can control ignition timing will stop predetonation engine will run mudi cooler develop power Now available completely shielded spark plug lead 90 plug cover Chosen TLG ME g & Byron Origleals its outstanding reliability Send $100 price list newsletter ordering Box 1732 CH Electronics IflCe Riverton WY 82501 307 857-6897 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1988/04
Page Numbers: 34, 35, 36, 37, 38, 39, 41, 133
Ken Flaglor Gee Bee Model Y MY FIRST GEE BEE model built 1975 time have built three Model Ys two model too spent day Ken Model Y found best- have quarter-scale size saw beautiful machine photographing flying model ever piloted Since Ken Flaglors replica decided build aircraft inside out Im sure have pic After having covered history full-size plane month Americas premier Gee Bee model builder takes us through construction start finish four-channel radios 61 engine Part 2 2 EHenry Haffke Top After unfortunate crash its contest debut Haffke rebuilt latest Model V immaculate condition seen Except addition some minor detailing its ready competition again Above Left Hows documentation 1/5-size Gee Bee nes tles underneath Ken Flaglors replica 1985 Nats Above Right beautiful front end what gives model great part Its appeal As model lacks brace wires oil cooler scoop spark plugs ignition wires pitot tube aileron balances appropriate prop 34 Model Aviation ture nut bolt screw can seen taking aircraft apart AMA Nats first held Springfield MA flown three models various Gee Bees competition Springfield birthplace Gee Bees area childhood home well Nats scheduled again 1985 decided build two new Gee Bees competition Both would models Kens Model Y would Sport Scale other would ful ly detailed FAI Scale competition Using stack photos taken other research able produce good set scale drawings cut two sets parts put two fuselages together started cowls took over two months finish cowls dummy engines point realized would nev er get two models completed time Nats concentrated Sport Scale model spent some late nights getting ready good friend Sid Clement agreed test flying Sid master pilot has flown other Gee Bee creations didnt have Model Y quite finished Sunday before Nats Sid took out test flying installed Left The basic fuselage sides i/a-in balsa Note stab platform rear two sides plywood wing saddle doubler Right After first few bulkheads glued fuselage sides structure begins take Gee bees familiar barrel shape Left if youve got good eye may have noticed bulkhead shown plan forward cockpit early fuselage Right Top side stringers place bottom stringers will added after wing fuselage joined Left Details see include direction grain wing fillet bases rear fairing block wing hold down block fuel tank lo cation Right completed wing fairings built up blocks forward aft have 1/8-in planking over fairing bulkheads April 1988 35 Left After bottom stringers have glued place tall wheel installed shown Right Construction left wing panel has completed now ready final shaping sanding Note aluminum torque rod used actuate aileron Left After wing built aileron cut free trailing edge torque rod bolt will become servo crank sections nylon control horns embedded wood housings serve bearings Right center section contaIns required two aileron servos Left Tail surfaces built up starting %2 sheet balsa base adding %2 ribs edges both sides form realistic surface course simpler version could made cutting surfaces out 1A-ln sheet balsa Right completed landing gear assemblies main gear strut Note brass tube bushing axle gear strut fairings shown match Flaglors replica old 60 very reliable turned out non-Schnuerle engine didnt have quite enough power After several tempts get model unstuck tweaked engine max gave ship hefty shove Sid brought smoothly air made few turns handed transmitter saying doesnt need anything flew beautifully wasnt enough power maneuvers Sid discussed power situation new Webra 61 never run Sid felt would job hated change engines point since dummy engine made fit older 60 next night ran Webra couple hours test stand stalled Thanks Edson adjustable engine mount went easily got pleasant surprise dummy engine fit bet ter over Webra over orig inal engine muffler also fit no alterations took model across street flying field quite few folks flying got ready another test time everything flawless couldnt believe difference two en gines same displacement entire flight super landing good everything else returned shop spent rest night detailing didnt get everything wanted done felt model respectable enough take Nats Model Y en tered Sport Scale Gee Bee R-1 Gi ant Scale Model D FM However came time fly Model Y luck ran out out showing Ken Flaglor around Gee Bee coun 36 Model Aviation try night before models static judged went out early next day assembled Model Y took some pictures Kens replica model together got flight line Model Y eager fly since done beautifully test As soon started takeoff run knew some thing wrong model jumped air bounced back down lifted off lurched air corrected cor rected again fought steer over grass edge runway few sec onds later thanks radio failure completely out control rolled over its back fought upright went spin hit ground mightily disappointed big gest jolt yet come static scores posted found Model Y earned highest static score event 97 didnt get chance start repair job over six months rebuild front fuselage wing panel radio being repaired middle contest season flew three contests repaired Model Y still gun-shy events Nats did poor job flying Gee Bee first two events still managed come second third contest comfortable again flew model way should flown took first wide margin short time have model have enjoyed immensely Im looking forward flying will future plans presented include details building Model Y variants first Model Y NRl 1049 ring cowl its shown Plate 3 drawings landing gear aircraft differed others Dashed lines fuse lage drawing show variation aft end tail skid rather faired tail wheel second Model Y NR7 1 8Y two distinct configurations original smooth cowl open gear fairings plane appeared Chi cago Air Races 1933 bump cowl long windshield fully faired landing gear legs Ken Flaglors replica NR7l8L main subject drawings details shown aircrafl string ers ribs exactly scale markings shown exact positions appear relation ribs stringers Correct colors aircraft follows NRl 1049 white red trim black pinstripe separating colors NR7l8Y original cream red trim black pinstripeNR7l8Y 1933 white red trim black pinstripe NR7l8L cream red trim black pinstripe Choose version cut out parts start construction Fuselage Prepare %-in fuselage sides marked drawing small arrows Note platform stabilizer added top aft end building NRl 1049 will note slight difference front end sides shown Plate 3 drawings Also note forward fuselage bulkheads different shown next drawing fuselage front end ply fuselage doublers laminated basic sides extend F-6 front end sides sure make right left side Start fuselage structure gluing A-in ply F-3 -in balsa F-2 bulk heads place Make sure keep thing square point let assembly dry completely before pro ceeding remaining fuselage bulkheads added now tail brought together joined Install top bottom center stringers alternate remaining stringers gluing one side matching stringer other side progress Prepare firewall mounting en gine making required holes fuel lines throttle linkage Locate firewall against F-2 dont install yet Make compartment fuel tank between F-2 F-3 install tank top front fuselage can now sheeted planked A-in balsa prefer planking sheeting works well no compound curves completes basic fuselage structure cowl built assembling series rings have cut mateThe completed cowl after addition crankcase blank consists three layers rocker bumps Filler forms smooth fillets -in balsa cylinder bottoms have around bumps Notches visible inside traced onto blank areas cowl necessary proper cylinder fit cut out accommodate cylinder halves April 1988 37 Left Two sets cowl parts seen cowl frame has assembled other spread out show pieces top row front rings contains two balsa rings ply ring lower row contains two ply rings four spacers Above planked cowl left has sanded its final shape shaped cowl some rocker arm bump blanks has shaped Youll need 18 rocker bumps rials shown plans Glue C-i C-2 C-3 together glue C-4 C-5 other two sets rings joined A-in-sq balsa strips cut length shown pians Note slight taper front back cowl Make sure keep taper glue A-in-sq bal sa joiners place good idea build cardboard jig keep shape during assembly Trace side view cowl cardboard making two patterns Join 900 angle other cutting slot halfway front back side sliding together Using line up structure will assure proper shape Allow cowl structure dry completely before planking A-in balsa strips built dummy engine before planking cowl got thing fit perfectly before doing planking can build entire front end engine secured firewall dummy engine place cowl lined up attached firewall sheet metal screws through mounting tabs C-4 After completing unit firewall can fitted front fuselage epoxied place against F-2 Doing way allows line up perfect fit cowl fuselage After planking cowl carve sand final shape before adding cowl bumps time-consuming bumps go around front cowl curve must carefully fitted place cut blanks bumps band saw carved rough sanded tops shape before gluing place cowl have built dummy engine can glue bumps exact ly belong top side of cylinders cowl completed bumps place final sanding finishing can done cowl dummy engine assembly big job feel impressive part model dummy engine have done really much work Make crankcase gluing three layers A-in balsa together per patterns shown Use Wasp cylinders Williams Brothers using front half cylinder Draw curve tracing bot tom cylinder nine flat sides crankcase Cut away wood inside curves cylinder halves will fit Shape crankcase fit engine making necessary cutouts carburetor needle valve fits properly cylinders can epox ied place cutout crankcase drying 18 pushrods can cut proper length %-in birch dowel stock Make point end pushrod can pushed crankcase Sand pushrods smooth tack glue piece scrap balsa painting much easier trying paint after assembling dummy engine will want make two cylind ers removable allow cooling air come over engine flight done gluing plywood curve between two cyl inders side missing ones making up two removable cylinders ply insert behind cylinder see plans detail sheet metal screw through ply curve ply insert behind cylinder will hold place model display Wing Cut ribs proper material stack short pieces spar stock Sand stack ribs final shape Select hard balsa spars Make two spacer blocks scrap material 7 8 long support spars during wing construction Mark rib locations spar After sliding ribs onto spars support spars spacer blocks placed between two A- 1 ribs other between Rib D Rib E ribs proper positions glue place Glue 12-in piece square leading edge notches front rib Cut A-in trailing edge shape aileron block notch ribs Glue place Cut down 1 x %-in trailing edge stock 1% width glue place between ribs B Cut tip parts hard A-in balsa glue place Add x %-in tip rib braces Using couple pieces scrap A6 sheet spacers tack glue A-in aileron lead ing edge wing structure Glue 3/ aileron base leading edge Glue half ribs top bottom aileron base Add A-in ply plates top bottom wing brace wire top wing compression struts Make up landing gear mount blocks /l6 ply parts epoxy place wing panel can now sanded its final shape Cut aileron free wing structure glue %-in triangle pieces top bottom trailing edge between ribs B F Carve leading edge ailer round shape Install pine block inboard end aileron leading edge Carefully drill take end aluminum torque rod Make A-in ply bushings torque rods glue place ribs A-I B shown plans Make up A-in aluminum torque rod fit aileron Drill through pine block torque rod underside secure sheet metal screw Fit brass tube wire hinge other end aileron wing tip Build other wing panel just did first except build upside down spacer blocks over plans both panels finished can joined dihedral braces Test fit braces two panels together make sure perfect fit joint before gluing Use ep oxy glue panels together block up wing tips two blocks equal height between ribs tip will keep panels properly aligned epoxy sets panels dry center section can sheeted Y32 balsa Fit wing mount block between ply fuselage doublers epoxy place using %-in ply mount supports side Fit wing fuselage after installing dowel wing leading edge Drill tap wing block nylon bolt Fit wing faking block between wing trailing edge F-7 38 Model Aviation First crankcase shaped cut out accept 61 engine Williams Bros plastic cylinders glued place Back dummy engine has ply curve used hold removable cylinders Complete dummy engine except pushrods spark plugs Ignition wires fuselage can now completed addition rear bottom stringers tail wheel mount Also add %-in ply strut mount plates tail surfaces can simply cut A-in sheet balsa can built up prefer build up tail surfaces did cut base parts 34 hard balsa Add ribs outer edge parts same mate rial both top bottom base surfaces sand final shape Make A-in ply hinges shown plans realistic tail can course use favorite hinging system place shown Use joiner horn elevators An aluminum horn can installed rud der shown Wing fairing Cut two fillet bases A6 ply grain running crosswise length fillet base l2/ x 2 Fit base wing fairing block behind wing Assemble wing loosely fuselage Insert fillet bases between saddle wing Glue saddle making sure dont get glue wing Tighten wing down hold fillet bases place until glue dries Cut h-in balsa fillet blocks shown side view fuselage fill tween fuselage outer edges fillet bases blocks Fit fuselage curve wing/fuselage joint Allow glue dry completely carve sand proper shape Cut three wing fillet formers A-in balsa glue place between front rear fillet blocks Glue three other side well former should against rear front fillet block other two spaced evenly point rear fillet block Sheet plank fil let between front rear blocks Sand final shape dry Landing gear fafrings Refer front view landing gear fairing cut required parts proper materials Laminate parts together weight heavily hold place glue sets Install locating dowel front rear set wheel fairings Tack glue two fairing halves together carve sand shape After shaped fairings fit ted landing gear wires tack glued place Mount radio components areas shown plans according manufacturers instructions servos rudder elevator throttle can mount ed %-in ply tray screwed rails along inside fuselage sides rudder servo should mounted center three using cables connecting rudder will scale installed aluminum rudder horn An arrow shaft pushrod used elevator flexible pushrod throttle Two servos should used ailerons quite large Servos connected receiver cable battery can located beside fuel tank receiver can go under servo tray fuselage switch can mounted aft end servo tray can reached through cockpit Finishing ways finish April 1988 39 Glue /8-in-dowel dummy pushrods block wood make easier paint Lacking addition fuel tank cap fuel gauge make complete re built model ready contest circuit again model always does well static scoring finished dummy engine inside com pleted cowl finished seamless cowl looks like molded fiberglass true scale though thats exactly what Flaglor used replica Model V close look pitot tube lower brace wires spreader bar open landing gear fairings cant pick out picture spreader bars natural wood finish model Scale model type fa bric covering will realistic choice gave entire structure coat Balsarite used Coverites Permagloss material available correct shade cream Permagloss woven fab ric material same composition used full-size aircraft lighter weight prepainted fully finished comes off roll Permagloss gives realistic fabric look finished model results lighter finish could get paint Perma gloss also very durable impervious fuel solvents masked off trim areas gave coat Primex prepares Permagloss painting gives much better adhesion also enhan ces gloss painted trim used Black Baron Epoxy trim sprayed coat Black Baron Clear over once trim cured Registration numbers cut Coy erite Trimsheet material applied exact position shown plans Rudder numbers also cut Trimsheet material Coverite Pinstripes used outline registration numbers wing rudder racing number 7 fuselage sides Gee Bee logo fin cut black Trimsheet material printing rudder below registra tion numbers hand lettered draft ing pen given coat clear fuel-proof ink Built Ken Flaglor lettering left side fu selage under stab hand painted flying landing wires made elastic cord add final touch detailing cord threaded through wing wheel fairings made remov able fuselage connect point made oval plate three holes wires knotted behind plate small rectangular balsa block epoxied behind plate hook installed balsa block fuselage opening cut block fit wire hook pulls rubberbands looped around hook first plate through fuselage over hook second plate Flying full-size Gee Bee Model Ys wonderful flying aircraft Kens magnificent replica racing planes people believe high-performance sport aircraft NR1 1049 won national aerobatics title 1932 pi loted Russell Boardman model flies better RC Scale model experience built straight balanced shown plans will surprise its fine flying characteristics find its performance superior quarter-scale Model Ys Ive built model will start its takeoff roll very little rudder needed keep going straight tail will come up after short run slight back pressure stick will bring gently off ground modContinued page 133 SCAL RADIO CONTROL 8W Nt EWH CONTROL-UNE 000 VINTAGESMOOTHGOLDEN AGENEW sizes2/CONTOURsizes2/BALLOON 31/i"234 3/s 133/4131/4 13%2hz4/z 11443/i11/4311/443/g31451/4 11/2511/24141145334 1/61/i214514l7/a6h SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS 4LL1AMS Send $3 fully Illustrated catalog other kite accessorIes in~ DEPTMA PAWNEE ST SAN MARCOS CA 9 New Kit CAJUN TWO STEP INTERMEDIATE TRAINER Slows walk yet Fully Aerobatic Complete Kit 89~ 56 wing 40 Length 40 Engine 4 lbs 4 CH Tiger Tail 4 New Deluxe Kit 16495 Fiber Glass Fuse & Belly Pan Foam wing & Stab Balsa & Plywood 72 wing Cajus RIC Pmducts 800 sq 112 Rosie SI Latayelte LA 70508 318 232-7446 Dealer inqutries invited April 1988 41 EELS FREE-FLIGHT Composite Construction Balsa Fuse w/Fiberglass Top Deck Chin Cowl & Belly Pan Foam wing & Hwd Ask about Kit & Eng Combos NO MORE KICKBACKS THROWN PROPS popular best selling odd-on ignition system world Convert engine spark ignition breakerless capacitive discharge Ignition System can installed engines 60 up both 2 & 4 stroke both single & twin cylinders 4-strokers run absolutely beautiful ignition lOto 30% power 4stroke engIne No kickback throwing props Absolutely no pee-detonation death 4stroke engines Much lower priced fuel & no rusty bearings commercial fuel ovailable RedMas Very low 9001000 rmp reliable idle end easy hand starts can control ignition timing will stop predetonation engine will run mudi cooler develop power Now available completely shielded spark plug lead 90 plug cover Chosen TLG ME g & Byron Origleals its outstanding reliability Send $100 price list newsletter ordering Box 1732 CH Electronics IflCe Riverton WY 82501 307 857-6897 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT