I SEVERAL MONTHS AGO read some claim Two-Meter RC Sail plane class dying out very popular dont know writer got source because everywhere go getting bigger ever 1982 Nats no exception Two-Meter event entries other Sailplane class several new kits size market neat designs coming out month saw some beautiful TwoMeter multi-channeled Sailplanes aile rons 1982 Nats looked number well-known outstanding pilots fly against figured Scooter best could least Scooter did its part placing first event Sailplane designed com pete hot F3B World Championship class wings built V dihedral ailerons would very com petitive does move out fastjust what designed John Gunsaullus St Petersburg FL has won several Two-Meter contests Scooter including first place 1981 Deep South Championships also fastest time recent F3B qualifying trials semi-finals flying against some excellent FAI-type aircraft really want good testimonial talk Tom Con nelly St Petersburg FL recent wins 30 Model Aviation bli surfaces removed easy packing Scooter will fit smallest com pact autos rudder removed model will fit within box just 42 long Left Every effort has made assure clean lines low drag wing-fuselage joint still simplicity Note fuselage top between wing panels airfoil-shaped Right An optional canopy arrangement has slotted wing spacer block ~snaps~ over brass wing wire tube Canopy removed can see bulkhead-mounted switch outer pushrod housing also snaps bulkhead slots Left Another view assembled optional canopy spacer block glued together simple spring-loaded pin holds down front canopy Right Wing tips simple clean Tip block shaped seine airfoil tapered rather sharp outer edge Left Extra weight windy days added inserting lead-filled partly filled brass tubes receiving holes wing Tube shown filled 410 lead slugs gun shop Right Look angle clean lines between wings fuselage obvious flying Scooter Two-Meter Unlimited classes have quickly taken him out Sportsman class Ex pert Ed Wright Jr Tampa FL has also won several first places including 1981 exceptionally easy fly Scooter Tangerine Championships worth work takes build First place get out model what put 1982 Nats against some really hot ultimate competition still competition best proof can give October 1983 31 Left Special wire hook used pulling wing-retaining rubberbands through fuselage its used hook rubber onto eye hook other wing panel Right Tail section straightforward Rudder area larger normal improve response low speeds Left Stabilator halves held place 4-40 setscrews aluminum wheel collars Note Allen wrench projecting stab Right tow hook homemade author extruded aluminum T-shaped stock commercial varieties could used General few things should shouldnt Dont use twist drill drill holes holes will drift off-center usually come out fuzzy Use drill tem plate guide piece brass tubing cutting edge filed form small teeth Use good aliphatic resin glue balsa parts fast cyanoacrylate CyA special areas good slow-drying epoxy high-strength plywood areas Dont build directly plan Cover plastic like Saran Wrap Afteryou have covered model like MonoKote save clear plastic backing lay over drawing building next model Select wood carefully Use wing spars have straight grain select ing sheeting wings use lighter wood outer panels heavier wood center Use light medium stab rudder Use lots elbow grease sandpaper finishing Templates Fabricate wing stabilizer templates before build anything else usually use A6 plywood A2 plywood Left Illustrated method drilling through fuselage ply wing rib hole balsa wing blockto insert rear wing wire tube proper dihedral angle Right front fuselage earlier version side-mounted switch various sizes brass tubing notches filed ends form cutting edges used drilling holespreferable twist drills 32 Model Aviation CHUCK WOOD l4ank ClarkA WOOD CHIP LETSGETSERIOUSCHUCk BILL THOTYOUD ANT WEALL-SUTWHATY TELL DON TOTy TV- THATLL YOUE NOT LEAVNGTHESeHEVeRA5KTRIFIC YOUR SIMMICK PUT I-MTO5LEEP DONTTY I/4SO BALSA FIN RUDDEI/4X /2 RUDDER TE HITOIC HALLS L*JTIL GIMMICkYOLhNOW WEIALL KNXK -SRULLTOOUTGUESS MLITTLE PILOT S TOPANDLEDGE YOU TELL TE 6AD LAMA SHOW BIZ- IEE N VA Sfl UP HERE HOW COME YOU -FULLA E IS cHIPr1/16 X /4 DIAGONALS LITTLe t pjI5H IT NI6HT WITH0 HES NOTA TA COMPUTE HE NOW/S BUT 1/IGRIBS I/8RIBS WATALKING DULLES1/32 PLYWOOD BOX NFR LAENCLOSES 1/16 PLYWOOD HORN AND I/B BRASS RODS N/ I- X 5/BELEVTOR T E I/B BALSA SIDES7 TOPANDBOITOM I/B PLYWOOD SIDES 3/16 X 1/4 L E1/16 X 1/4 SPARS TOP AND BOTTOM WITH 1/8 50 SPACERS BETWEEN /4 BALSA BLOCKS BETWEEN WING SPARS 1/16 X 1/4 CAPS ALL RIBS TCA/ BOTTOM 1/16 WEBS BETWEEN ALL SPARS I/BX 1/4 SPRUCE SPARS TOPAND BOlTOM BOTH WING PANELS SO TTPLFTBLOCK SO T E fl NT BRACE TUBEI/2DIA WEIGHT TUBE BRASS TUBE 1/16 PLYWOOD /4 BALSA BLOCKS 4 BALSA BLOCK SPAR WEBS WEEN SPARS TO HERE HOLLOW BLOCKFRONTAND BJ1/32 PLYWOOD BRACE JaNS WNG PANELS AT SPARS I/B PLYWOOD SIDE3/B BALSA SHEETFILL UNDER/OVER TUBE WITHTOP AND BOTTOM BOll-I PANELS ND BOTTOM PANELSWING FAIRINGSSPRUCE AND MICRO-BALLOONS 1/16 WEBS BETWEEN ALL SPARS easier cut Cut out master wing airfoil template first dont drill holes yet Next cut WI wing rib template should /16-in smaller thafl master airfoil template Drill WI first locate clamp WI master airfoil template drill master now have accurate master lay fuselage sides drilling wing wire tube holes proper location also serves contour top fuselage airfoil shape However dont build wing fuselage yet Construct stab drill rib template next stab template used drill stab ribs also stab horn Vertical fin rudder Cut out two A2 ply horn box sides shaded area shown drawing Drill slot stab bearing rear wire clearance Lay side ply box down build Y16-in spacer frame around outside edge add second side should add up / rudder thickness okay remove top side adding horn bearing horn glue top ply section place Quickly stick piece 3A2-in wire stab-horn bearing Using square make sure sides aligned wire 900 sides horn box dont want crooked stab relationship rudder Also make sure horn remains free movable dry sand front back square lay drawing construct ver tical fin movable rudder around horn box Leave small dorsal fin off time Since rudder parts ribs -in wide trailing edge stock around Yb-in add trailing edge shim ming center ribs After glue has dried can trim sand ribs top bottom fair trailing edge can now construct fuselage Fuselage recommend forward fu selage sides plus bulkheads Wl wing ribs four stab ribs cut Lite-Ply plywood available Sig light weight easy cuteven jigsaw Whether use Lite-Ply regular ply cut fuselage sides shown Use ply forward splice balsa splice rear Use master airfoil template locate wing wire tube holes drill holes required Sand fuselage sides together brass wing tubes place mas ter airfoil templates will also help sand airfoil shape top fuse lage sides Cut fuselage bottom also ply forward one-third balsa rear two-thirds Next cut out bulkheads nose block nose block constructed three pieces -in basswood center section cut out can add lead ballast Taper outside nose block shown plans Lay fuselage bottom drawing Glue nose block bulkheads set rudder horn box assembly place Notice fin leading edge just barely rests Bulkhead F7 part dry add stab pushrod outer housing through bulkheads ending F7 Add inner pushrod metal horn clevis Make sure pushrod horn operate freely Add fuselage sides Install piece -in brass tubing through wing wire tube holes help align sides usually make template piece 3-in-sq balsa sheet cutting side about 910 Use template check angle between tubing fuselage sides fuselage straight F2 F7 angle same both sides clamp sides around F3 area Clamp fuselage sides lower ply box area rudder small C-clamp clothespins Finally clamp sides nose block Add other clamps and/or pins required use slow-drying epoxy Hobby Poxy #2 sides allows enough time align everything before glue sets up can now add rudder pushrod etc Note both outer pushrod housings inner rods place can snapped up out F2 later insertion radio receiver may want run antenna tube through fuselage side usually run antenna tube 3A6-in hole HRI/4 BALSA AIBOTTOII 1r SHOWN FI 0 RIGHT WING Pt II --F 111111111 OPT AWNCRIMPF____ II WHEELENDS COLLAR IL. I I/4LB00 SHEETTUBE[7}o Li ROOT RIBPOLY BREAK TEMPLATETEMPLATE 1 FII V4 TD LITE LY / POLYNEORA& BF~ I/lB 1/4 VBOCL BALSA SPOR BET WNRS N 5PA4I5/55 6 E WISENOTEAREAINSERTE BLAIT BE S/3D D-B/W TO PORN D-I/D FILL AREA WITh SPRUCE B MICRO BALLOONS 5/B BALSA TRAIUNGI EDGEI 3/lA 1/4E-E LEADING EDGES JEAIRS.Li LaLSJLBe F 1/4 50 BALSA P.- TAIL TYP CROSS SECT EPOSY BEAD FRlIh1I -3 PIECES OF S/jIq - SSWOOD CnE.- SECTION CUT OUT WW4 CANOPY NORMALLY NOSESOWN WITh EYE AOl FOREIGHT B RUBBER BARED WEIGHT BALSA ABEA- S/A IAIEFLATBATTERYjYSABEAF PACESI TOW H A-A I-tiNCAN0PY B WING SPACER BLOCKS MAY BE GLEES TOGETIER AFER FORABBO fuselage side after covering slit MonoKote reach small hook pull out antenna Cut out two wing fairing blocks 34 Model Aviation TUBE Left Wing spacer block sits bulkhead wing wire tube After covering rear block hinged 3M tape covering material Front ot block held place canopy Right Wing spacer block canopy glued together held down rubberband eye hooks FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 1—I/IE BALGA TRAILING EDGE II~-IVt _____________________ _________________________ _________________________Ii 1II -B IIAl r 11 II I II i1 LII 11I-~IIII II1-iiIi I-u - II BALOA 0B OO BRASS TUBE WING EYE HOOKS / RIBS 3-I/2 IZ 2 EACH 3-1HLONS 2 EACH H- S/4 LONS ROOT WEBS [v32][b-2-10-1-10]]V F --F--II itII RIGHT WING PLAN OUTBOARD PANEL IIII IOR NOTE PRE-ULUE ALL WING WEBS BEFORE FINAL IIi GLUING III -II -I- F OTE RASP-IN SLOTS FOR P/H 0 GAIN ACCESS TO RECEIVERALL WINB SHEETING IS AREAVW BALSA V F-3 P-4 F-5 F-H __ Ti 7K II H LEFT /ING PIAN INBOARD PANEL W-IN-SH-2N-3N-SH-SW-SW-3W-3 SWB BALSA WEB BAGSAERTICAL GRAIN EIB PLY/Bo /4 SPRUCE SPARS GEIGHT TUBEI/BBALSA WEBI VERT GRAIN/8 BALSA VB/8 fSHEETVERY GRAIN 9FLSAWY STOPAGO RIB H-H AFTER PANELS ARE JOINEE W-4 V4BALSA WEB IN POLY AREA NOTE POLYHEIWAL BRACES lAST SHOWN -f I/4SO EALSA LEADING EDGE BEVELEGAfEAESSE OF TOP-YE AEDGE OF BOTTOM-YE— B--NOT SHOWN ON L/H PANELS OUTBOARD PANEL oR-HA-A-HA-SN-IDW-I LEFT WING PLAN W-5 VB BALSA WEB HERE TO YIP 032 10 S1600 3/IN 5/Bo1o6 /16 PLT BRASS OR ALUM TUBE HORNIS 0 5/5200 GAO TUBE 2-5/4MASTER AIRFOIL-3/52 Ox Soo %5GU5LS TUBE B-"/000 TEMPLATEIS TIVEHORS BEARING ___S-VS WING POLYHEDRAL DETA L WIRE BOGS REOLIHEE WRO7/52o 7TYPICAL CROSS SECTIONI/IA F-7U I5/52 4-VS STAB 3/32 S-SWY2ATZI CANOPY HINGEVRPLY5/52 SNAP SYSTEM B-2S4 B-S 1/16 BALSA 1261 Il/ilW284 I/RBALSA RI -111 -Il FINlIIIiWEIGHT GRAIN IINLAY BET SIDESIAABB1/4 SHEETCOVEREG902 ESPY2902 LEAVE FUSELAGE COMAER SHARP AT THIS . WING LOAONU POINT PROGRESBOELY INCREASE RADIUS ruLELAGE SIE VIEWENE ELEVATOR SAYER7-z oz AFT APPROX H IS 3/52 BP20 TUBE IS BUKHEAO AIRING--C2LFTSTAB HORN BOG-I/16 OUThINE 3Fi0—A5/16 BALSA B/ V32 AFT SECTIIBO ----PLY TO FORM I/B I---I/B BALSA TOP--S- 2F3F-HSIDED B BOTTOM -T[j V /H I/O HICK BGS F-SED-TOP UI-IFETISIS S SPUPO / I/B 05 BRASS TUBE/52 PLY IF1 DOUBLER ALL CORNERS 5/52 R EUCEPT AU NOTED C USE SMALL RUDDER RUSSER B FIN ScOT NOTROOOER 0/0 /LROHOL SHOWN ON TOP VIEWEXITOLEYT TAIL GRID MASTER AIBEDIL TMPLATE CUT LEARANCE FORWING FAIRIRUS FROM S/B WOOD SHEET RING HOOKS TOP VIEW TES OUTLINE OF FUSELAGE SIGES ANTENNA EVIT SCOOTER METER NE D BY LE ON K INCAID IBBUN0 f TRACING BY JOE DENARCO %I-in basswood using master airfoil template will need tapered ap proximately /4n per top view plans wing tubes inserted through fuselage add fairing blocks check taper Trim inside surface blocks until outsides parallel blocks fit flush against fuselage parallel outside wing butts can glue place Add rear top side fuselage cross-grain sheeting tween sides wing fairing blocks October 1983 35 RD PANEL Left Wing tip ribs cut proper length stacked piece spar stock ready shaping tops per templates outer sides Right wing tip center panels joined together dihedral braces can easily installed photos author Left The wing panels have built nd sanded smooth Theyre now ready covering Note tips finished thin edge can seen wing half left Right stabilator horn place 1/32 ply horn box cover ready added Fabricate wing spacer block fit tween sides rest top F2 wing tube Sand top block airfoil shape fuselage sides fairing blocks After spacer block sanded shape cut carve sand canopy block fit over radio area neatly over spacer block Glue scrap X p approxi mately 1-in long across bottom canopy block several places properly locate canopy fuselage canopy block wing spacer block may glued togetheror left separate canopy can held place eye hooks rubberbands alternate method shown drawing may used Add small /4 sheet dorsal fin fuselage ready sand Wings layout plan may seem little strange you would rather cut up drawing place tip panels ends center panels can build complete wing halves together thats fine arranged panels way did two reasons First both tip panels can built one-piece 36-in bottom spar 36-in pieces complete rest tip panels minimum scrap same true center panels except 48-in wood used Second leave main x s piece sandwich /4-in brass wing wire tubes between spars helps keep tubes nice straight will notice bottom Wl same shape WI Consequently ribs can cut WI template guide Make two ribs Lite-Ply six /s balsa 26 Vis balsa Four teen 26 / s-in ribs tapered tip panels stack taper 14 tip ribs Select seven left panel seven right panel Using thin-line felt-tip pen mark two ribs W5 two W6 etc through WI Lay bottom spar drawing Insert rib its correct posi tion felt-tip pen hurk ribs leading edge LE trailing edge TE excess should cut off Take two WI ribs contour top airfoil shown drawing Using short piece x stock stack ribs W4 through WI contour tops Ribs W5 through W 10 same op posite panel will have re-cut top spar notch tapered ribs always assemble center panels first Yes slight bit undercamber wing dont worry about can build wing right over draving airfoil rests main spar tip trailing edge Cut leading trailing edge sheeting proper length panel Due leading edge contouring bending over ribs make sheeting about A-in wider shown drawing can cut off excess after assembly Put together both center panels same time following order Lay bottom lead ing edge sheeting drawing lining up spar Lay 42-in one-piece uncut spar top sheeting proper place can CyA-glue spar sheetingor use white glue Lay dont pin down bottom TB place remember bevel first Add W3 ribs glue spar sheeting TE Add WI ply rib brass tubing same time tilt rib 3V0 use template end brass tubing should just touch bottom spar see cross section DD important brass tube no longer shorter indicated will change angle Add top piece spar both panels Before gluing check top straightedge Make sure brass tubing squarely tween top bottom spars just touching bottom spar Add drop CyA hold tubing place Add A-in-width vertical-grain balsa webbing between end tube Rib W3 Use either scrap wood and/or micro balloons glue fill cavities side top bottom tubes Add As ply brace side tube area will sandwich tubes between spars Cut trim W2 ribs fit Make sure aft part W2 ribs level top spar necessary add Vis-in shims under W2s temporarily substitute As-in fairing sheet will added later Add vertical-grain webs between spars time may want add webs before add top spar prefer fit time whatever feel best razor plane shape LB shown add front face ribs Now will raise bottom sheeting ribsby shimming can use either long ruler TB stock good straight stock around A-in thick usually two three steps gluing CyA go 36 Model Aviation Left The stabilator rudder ready cover one-piece hinge pin used may visible magazine reproduction picture allows easy rudder removal case repairs needed Right vertical fin constructed around completed horn box fuselage sides will sandwich both sides lower fin horn box assembly provide strong stabilator support Run ruler between drawing LE sheeting until sheeting shimmed tightly against ribs Continue closing gap shims gluing until bottom sheeting completely glued ribs LE can now cut main spars center panels can moved sepa rately Note Leave off top sheeting time Due undercambered airfoil tip ribs will touching bottom TE Remove panels building board glue TE ribs dry add top TE sheeting Assemble tip panels same way center panels After panels completed except top sheeting use sanding block sand panel ends poly break until fit together perfectly Lay center panel building board shim tip panel proper angle butt-glue panels together Wipe away excess glue dry add dihedral braces side main spars back sid LE Trim taper I-in length spruce /x sq x /4 fit hollow section TE poly break strengthen joint Cut trim add W4 Use forward halves two extra W2 ribs between spars leading edge inserted against innermost W3 weight tube support Youll need two pieces /-in GD aluminum fiberglass tubing brass too heavy least 5-in long install through WI W2 ribs glue place Cardboard tubes model rocket motors would also work well Find best-fitting brass tubing avail able hobby shops will go inside aluminum tubes Cut about four pieces brass tubing will fill remov able weights Fill two about halfway lead completely fill other two A6-in brass tube 5-in long filled lead will weigh 46 oz Two tubes course will weigh 92 oz wing tube extended 7-in total weight added will about 138 oz Lay main inner wine nanel building board add top LE sheeting completely dry raise shim center panels until tip panels laying building board add outer top sheeting Befrre have pins added will need check outer panel washout Twist tip panel until tip TE between /x 3/6-in higher dihedral break set add additional pins sheeting needed Add center panel fairing sheet tween spar TE bottom side Add lock balsa between WI W2 over A-in GD rear wing wire tube hole wing half Now have add -in GD brass tube through -in hole /6 sq balsa supportat proper angle Heres Remove rear -in brass wing tube fuselage Install wing half main wing wire Using long extension drill /x-in tube very coarse teeth filed end run through fuselage fairing blocks -in hole nlv rib WI Y 2nd drill tho 3/ n block until drill goes through Rib W2 Remove wing half drill op posite half same way Add little glue brass tubing -in GD l/2-in length install hole now ready add top center fairing sheet ing cap strips wing tip block wing now complete except sanding covering OPTIONAL WEBBING Its important use spar webbing Installing webs between spars best though could glue edges shown Stabilator stab halves built almost flat sanded final shape Lay down bottom one-piece spar over drawing Cut ribs four -Ply eight /6 sheet balsa -in high Notch top bottom spars Drill Continued page 129 October 1983 37 entire tail section ready covering fitted together early preview sections easy build have good strength though lightweight beauty Scooter Two-Meter Sailplane form finish match its truly outstanding flight qualities Wing leading edge pin striping certainly decorative also thought functional least some amount turbulating effect briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 129
I SEVERAL MONTHS AGO read some claim Two-Meter RC Sail plane class dying out very popular dont know writer got source because everywhere go getting bigger ever 1982 Nats no exception Two-Meter event entries other Sailplane class several new kits size market neat designs coming out month saw some beautiful TwoMeter multi-channeled Sailplanes aile rons 1982 Nats looked number well-known outstanding pilots fly against figured Scooter best could least Scooter did its part placing first event Sailplane designed com pete hot F3B World Championship class wings built V dihedral ailerons would very com petitive does move out fastjust what designed John Gunsaullus St Petersburg FL has won several Two-Meter contests Scooter including first place 1981 Deep South Championships also fastest time recent F3B qualifying trials semi-finals flying against some excellent FAI-type aircraft really want good testimonial talk Tom Con nelly St Petersburg FL recent wins 30 Model Aviation bli surfaces removed easy packing Scooter will fit smallest com pact autos rudder removed model will fit within box just 42 long Left Every effort has made assure clean lines low drag wing-fuselage joint still simplicity Note fuselage top between wing panels airfoil-shaped Right An optional canopy arrangement has slotted wing spacer block ~snaps~ over brass wing wire tube Canopy removed can see bulkhead-mounted switch outer pushrod housing also snaps bulkhead slots Left Another view assembled optional canopy spacer block glued together simple spring-loaded pin holds down front canopy Right Wing tips simple clean Tip block shaped seine airfoil tapered rather sharp outer edge Left Extra weight windy days added inserting lead-filled partly filled brass tubes receiving holes wing Tube shown filled 410 lead slugs gun shop Right Look angle clean lines between wings fuselage obvious flying Scooter Two-Meter Unlimited classes have quickly taken him out Sportsman class Ex pert Ed Wright Jr Tampa FL has also won several first places including 1981 exceptionally easy fly Scooter Tangerine Championships worth work takes build First place get out model what put 1982 Nats against some really hot ultimate competition still competition best proof can give October 1983 31 Left Special wire hook used pulling wing-retaining rubberbands through fuselage its used hook rubber onto eye hook other wing panel Right Tail section straightforward Rudder area larger normal improve response low speeds Left Stabilator halves held place 4-40 setscrews aluminum wheel collars Note Allen wrench projecting stab Right tow hook homemade author extruded aluminum T-shaped stock commercial varieties could used General few things should shouldnt Dont use twist drill drill holes holes will drift off-center usually come out fuzzy Use drill tem plate guide piece brass tubing cutting edge filed form small teeth Use good aliphatic resin glue balsa parts fast cyanoacrylate CyA special areas good slow-drying epoxy high-strength plywood areas Dont build directly plan Cover plastic like Saran Wrap Afteryou have covered model like MonoKote save clear plastic backing lay over drawing building next model Select wood carefully Use wing spars have straight grain select ing sheeting wings use lighter wood outer panels heavier wood center Use light medium stab rudder Use lots elbow grease sandpaper finishing Templates Fabricate wing stabilizer templates before build anything else usually use A6 plywood A2 plywood Left Illustrated method drilling through fuselage ply wing rib hole balsa wing blockto insert rear wing wire tube proper dihedral angle Right front fuselage earlier version side-mounted switch various sizes brass tubing notches filed ends form cutting edges used drilling holespreferable twist drills 32 Model Aviation CHUCK WOOD l4ank ClarkA WOOD CHIP LETSGETSERIOUSCHUCk BILL THOTYOUD ANT WEALL-SUTWHATY TELL DON TOTy TV- THATLL YOUE NOT LEAVNGTHESeHEVeRA5KTRIFIC YOUR SIMMICK PUT I-MTO5LEEP DONTTY I/4SO BALSA FIN RUDDEI/4X /2 RUDDER TE HITOIC HALLS L*JTIL GIMMICkYOLhNOW WEIALL KNXK -SRULLTOOUTGUESS MLITTLE PILOT S TOPANDLEDGE YOU TELL TE 6AD LAMA SHOW BIZ- IEE N VA Sfl UP HERE HOW COME YOU -FULLA E IS cHIPr1/16 X /4 DIAGONALS LITTLe t pjI5H IT NI6HT WITH0 HES NOTA TA COMPUTE HE NOW/S BUT 1/IGRIBS I/8RIBS WATALKING DULLES1/32 PLYWOOD BOX NFR LAENCLOSES 1/16 PLYWOOD HORN AND I/B BRASS RODS N/ I- X 5/BELEVTOR T E I/B BALSA SIDES7 TOPANDBOITOM I/B PLYWOOD SIDES 3/16 X 1/4 L E1/16 X 1/4 SPARS TOP AND BOTTOM WITH 1/8 50 SPACERS BETWEEN /4 BALSA BLOCKS BETWEEN WING SPARS 1/16 X 1/4 CAPS ALL RIBS TCA/ BOTTOM 1/16 WEBS BETWEEN ALL SPARS I/BX 1/4 SPRUCE SPARS TOPAND BOlTOM BOTH WING PANELS SO TTPLFTBLOCK SO T E fl NT BRACE TUBEI/2DIA WEIGHT TUBE BRASS TUBE 1/16 PLYWOOD /4 BALSA BLOCKS 4 BALSA BLOCK SPAR WEBS WEEN SPARS TO HERE HOLLOW BLOCKFRONTAND BJ1/32 PLYWOOD BRACE JaNS WNG PANELS AT SPARS I/B PLYWOOD SIDE3/B BALSA SHEETFILL UNDER/OVER TUBE WITHTOP AND BOTTOM BOll-I PANELS ND BOTTOM PANELSWING FAIRINGSSPRUCE AND MICRO-BALLOONS 1/16 WEBS BETWEEN ALL SPARS easier cut Cut out master wing airfoil template first dont drill holes yet Next cut WI wing rib template should /16-in smaller thafl master airfoil template Drill WI first locate clamp WI master airfoil template drill master now have accurate master lay fuselage sides drilling wing wire tube holes proper location also serves contour top fuselage airfoil shape However dont build wing fuselage yet Construct stab drill rib template next stab template used drill stab ribs also stab horn Vertical fin rudder Cut out two A2 ply horn box sides shaded area shown drawing Drill slot stab bearing rear wire clearance Lay side ply box down build Y16-in spacer frame around outside edge add second side should add up / rudder thickness okay remove top side adding horn bearing horn glue top ply section place Quickly stick piece 3A2-in wire stab-horn bearing Using square make sure sides aligned wire 900 sides horn box dont want crooked stab relationship rudder Also make sure horn remains free movable dry sand front back square lay drawing construct ver tical fin movable rudder around horn box Leave small dorsal fin off time Since rudder parts ribs -in wide trailing edge stock around Yb-in add trailing edge shim ming center ribs After glue has dried can trim sand ribs top bottom fair trailing edge can now construct fuselage Fuselage recommend forward fu selage sides plus bulkheads Wl wing ribs four stab ribs cut Lite-Ply plywood available Sig light weight easy cuteven jigsaw Whether use Lite-Ply regular ply cut fuselage sides shown Use ply forward splice balsa splice rear Use master airfoil template locate wing wire tube holes drill holes required Sand fuselage sides together brass wing tubes place mas ter airfoil templates will also help sand airfoil shape top fuse lage sides Cut fuselage bottom also ply forward one-third balsa rear two-thirds Next cut out bulkheads nose block nose block constructed three pieces -in basswood center section cut out can add lead ballast Taper outside nose block shown plans Lay fuselage bottom drawing Glue nose block bulkheads set rudder horn box assembly place Notice fin leading edge just barely rests Bulkhead F7 part dry add stab pushrod outer housing through bulkheads ending F7 Add inner pushrod metal horn clevis Make sure pushrod horn operate freely Add fuselage sides Install piece -in brass tubing through wing wire tube holes help align sides usually make template piece 3-in-sq balsa sheet cutting side about 910 Use template check angle between tubing fuselage sides fuselage straight F2 F7 angle same both sides clamp sides around F3 area Clamp fuselage sides lower ply box area rudder small C-clamp clothespins Finally clamp sides nose block Add other clamps and/or pins required use slow-drying epoxy Hobby Poxy #2 sides allows enough time align everything before glue sets up can now add rudder pushrod etc Note both outer pushrod housings inner rods place can snapped up out F2 later insertion radio receiver may want run antenna tube through fuselage side usually run antenna tube 3A6-in hole HRI/4 BALSA AIBOTTOII 1r SHOWN FI 0 RIGHT WING Pt II --F 111111111 OPT AWNCRIMPF____ II WHEELENDS COLLAR IL. I I/4LB00 SHEETTUBE[7}o Li ROOT RIBPOLY BREAK TEMPLATETEMPLATE 1 FII V4 TD LITE LY / POLYNEORA& BF~ I/lB 1/4 VBOCL BALSA SPOR BET WNRS N 5PA4I5/55 6 E WISENOTEAREAINSERTE BLAIT BE S/3D D-B/W TO PORN D-I/D FILL AREA WITh SPRUCE B MICRO BALLOONS 5/B BALSA TRAIUNGI EDGEI 3/lA 1/4E-E LEADING EDGES JEAIRS.Li LaLSJLBe F 1/4 50 BALSA P.- TAIL TYP CROSS SECT EPOSY BEAD FRlIh1I -3 PIECES OF S/jIq - SSWOOD CnE.- SECTION CUT OUT WW4 CANOPY NORMALLY NOSESOWN WITh EYE AOl FOREIGHT B RUBBER BARED WEIGHT BALSA ABEA- S/A IAIEFLATBATTERYjYSABEAF PACESI TOW H A-A I-tiNCAN0PY B WING SPACER BLOCKS MAY BE GLEES TOGETIER AFER FORABBO fuselage side after covering slit MonoKote reach small hook pull out antenna Cut out two wing fairing blocks 34 Model Aviation TUBE Left Wing spacer block sits bulkhead wing wire tube After covering rear block hinged 3M tape covering material Front ot block held place canopy Right Wing spacer block canopy glued together held down rubberband eye hooks FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 1—I/IE BALGA TRAILING EDGE II~-IVt _____________________ _________________________ _________________________Ii 1II -B IIAl r 11 II I II i1 LII 11I-~IIII II1-iiIi I-u - II BALOA 0B OO BRASS TUBE WING EYE HOOKS / RIBS 3-I/2 IZ 2 EACH 3-1HLONS 2 EACH H- S/4 LONS ROOT WEBS [v32][b-2-10-1-10]]V F --F--II itII RIGHT WING PLAN OUTBOARD PANEL IIII IOR NOTE PRE-ULUE ALL WING WEBS BEFORE FINAL IIi GLUING III -II -I- F OTE RASP-IN SLOTS FOR P/H 0 GAIN ACCESS TO RECEIVERALL WINB SHEETING IS AREAVW BALSA V F-3 P-4 F-5 F-H __ Ti 7K II H LEFT /ING PIAN INBOARD PANEL W-IN-SH-2N-3N-SH-SW-SW-3W-3 SWB BALSA WEB BAGSAERTICAL GRAIN EIB PLY/Bo /4 SPRUCE SPARS GEIGHT TUBEI/BBALSA WEBI VERT GRAIN/8 BALSA VB/8 fSHEETVERY GRAIN 9FLSAWY STOPAGO RIB H-H AFTER PANELS ARE JOINEE W-4 V4BALSA WEB IN POLY AREA NOTE POLYHEIWAL BRACES lAST SHOWN -f I/4SO EALSA LEADING EDGE BEVELEGAfEAESSE OF TOP-YE AEDGE OF BOTTOM-YE— B--NOT SHOWN ON L/H PANELS OUTBOARD PANEL oR-HA-A-HA-SN-IDW-I LEFT WING PLAN W-5 VB BALSA WEB HERE TO YIP 032 10 S1600 3/IN 5/Bo1o6 /16 PLT BRASS OR ALUM TUBE HORNIS 0 5/5200 GAO TUBE 2-5/4MASTER AIRFOIL-3/52 Ox Soo %5GU5LS TUBE B-"/000 TEMPLATEIS TIVEHORS BEARING ___S-VS WING POLYHEDRAL DETA L WIRE BOGS REOLIHEE WRO7/52o 7TYPICAL CROSS SECTIONI/IA F-7U I5/52 4-VS STAB 3/32 S-SWY2ATZI CANOPY HINGEVRPLY5/52 SNAP SYSTEM B-2S4 B-S 1/16 BALSA 1261 Il/ilW284 I/RBALSA RI -111 -Il FINlIIIiWEIGHT GRAIN IINLAY BET SIDESIAABB1/4 SHEETCOVEREG902 ESPY2902 LEAVE FUSELAGE COMAER SHARP AT THIS . WING LOAONU POINT PROGRESBOELY INCREASE RADIUS ruLELAGE SIE VIEWENE ELEVATOR SAYER7-z oz AFT APPROX H IS 3/52 BP20 TUBE IS BUKHEAO AIRING--C2LFTSTAB HORN BOG-I/16 OUThINE 3Fi0—A5/16 BALSA B/ V32 AFT SECTIIBO ----PLY TO FORM I/B I---I/B BALSA TOP--S- 2F3F-HSIDED B BOTTOM -T[j V /H I/O HICK BGS F-SED-TOP UI-IFETISIS S SPUPO / I/B 05 BRASS TUBE/52 PLY IF1 DOUBLER ALL CORNERS 5/52 R EUCEPT AU NOTED C USE SMALL RUDDER RUSSER B FIN ScOT NOTROOOER 0/0 /LROHOL SHOWN ON TOP VIEWEXITOLEYT TAIL GRID MASTER AIBEDIL TMPLATE CUT LEARANCE FORWING FAIRIRUS FROM S/B WOOD SHEET RING HOOKS TOP VIEW TES OUTLINE OF FUSELAGE SIGES ANTENNA EVIT SCOOTER METER NE D BY LE ON K INCAID IBBUN0 f TRACING BY JOE DENARCO %I-in basswood using master airfoil template will need tapered ap proximately /4n per top view plans wing tubes inserted through fuselage add fairing blocks check taper Trim inside surface blocks until outsides parallel blocks fit flush against fuselage parallel outside wing butts can glue place Add rear top side fuselage cross-grain sheeting tween sides wing fairing blocks October 1983 35 RD PANEL Left Wing tip ribs cut proper length stacked piece spar stock ready shaping tops per templates outer sides Right wing tip center panels joined together dihedral braces can easily installed photos author Left The wing panels have built nd sanded smooth Theyre now ready covering Note tips finished thin edge can seen wing half left Right stabilator horn place 1/32 ply horn box cover ready added Fabricate wing spacer block fit tween sides rest top F2 wing tube Sand top block airfoil shape fuselage sides fairing blocks After spacer block sanded shape cut carve sand canopy block fit over radio area neatly over spacer block Glue scrap X p approxi mately 1-in long across bottom canopy block several places properly locate canopy fuselage canopy block wing spacer block may glued togetheror left separate canopy can held place eye hooks rubberbands alternate method shown drawing may used Add small /4 sheet dorsal fin fuselage ready sand Wings layout plan may seem little strange you would rather cut up drawing place tip panels ends center panels can build complete wing halves together thats fine arranged panels way did two reasons First both tip panels can built one-piece 36-in bottom spar 36-in pieces complete rest tip panels minimum scrap same true center panels except 48-in wood used Second leave main x s piece sandwich /4-in brass wing wire tubes between spars helps keep tubes nice straight will notice bottom Wl same shape WI Consequently ribs can cut WI template guide Make two ribs Lite-Ply six /s balsa 26 Vis balsa Four teen 26 / s-in ribs tapered tip panels stack taper 14 tip ribs Select seven left panel seven right panel Using thin-line felt-tip pen mark two ribs W5 two W6 etc through WI Lay bottom spar drawing Insert rib its correct posi tion felt-tip pen hurk ribs leading edge LE trailing edge TE excess should cut off Take two WI ribs contour top airfoil shown drawing Using short piece x stock stack ribs W4 through WI contour tops Ribs W5 through W 10 same op posite panel will have re-cut top spar notch tapered ribs always assemble center panels first Yes slight bit undercamber wing dont worry about can build wing right over draving airfoil rests main spar tip trailing edge Cut leading trailing edge sheeting proper length panel Due leading edge contouring bending over ribs make sheeting about A-in wider shown drawing can cut off excess after assembly Put together both center panels same time following order Lay bottom lead ing edge sheeting drawing lining up spar Lay 42-in one-piece uncut spar top sheeting proper place can CyA-glue spar sheetingor use white glue Lay dont pin down bottom TB place remember bevel first Add W3 ribs glue spar sheeting TE Add WI ply rib brass tubing same time tilt rib 3V0 use template end brass tubing should just touch bottom spar see cross section DD important brass tube no longer shorter indicated will change angle Add top piece spar both panels Before gluing check top straightedge Make sure brass tubing squarely tween top bottom spars just touching bottom spar Add drop CyA hold tubing place Add A-in-width vertical-grain balsa webbing between end tube Rib W3 Use either scrap wood and/or micro balloons glue fill cavities side top bottom tubes Add As ply brace side tube area will sandwich tubes between spars Cut trim W2 ribs fit Make sure aft part W2 ribs level top spar necessary add Vis-in shims under W2s temporarily substitute As-in fairing sheet will added later Add vertical-grain webs between spars time may want add webs before add top spar prefer fit time whatever feel best razor plane shape LB shown add front face ribs Now will raise bottom sheeting ribsby shimming can use either long ruler TB stock good straight stock around A-in thick usually two three steps gluing CyA go 36 Model Aviation Left The stabilator rudder ready cover one-piece hinge pin used may visible magazine reproduction picture allows easy rudder removal case repairs needed Right vertical fin constructed around completed horn box fuselage sides will sandwich both sides lower fin horn box assembly provide strong stabilator support Run ruler between drawing LE sheeting until sheeting shimmed tightly against ribs Continue closing gap shims gluing until bottom sheeting completely glued ribs LE can now cut main spars center panels can moved sepa rately Note Leave off top sheeting time Due undercambered airfoil tip ribs will touching bottom TE Remove panels building board glue TE ribs dry add top TE sheeting Assemble tip panels same way center panels After panels completed except top sheeting use sanding block sand panel ends poly break until fit together perfectly Lay center panel building board shim tip panel proper angle butt-glue panels together Wipe away excess glue dry add dihedral braces side main spars back sid LE Trim taper I-in length spruce /x sq x /4 fit hollow section TE poly break strengthen joint Cut trim add W4 Use forward halves two extra W2 ribs between spars leading edge inserted against innermost W3 weight tube support Youll need two pieces /-in GD aluminum fiberglass tubing brass too heavy least 5-in long install through WI W2 ribs glue place Cardboard tubes model rocket motors would also work well Find best-fitting brass tubing avail able hobby shops will go inside aluminum tubes Cut about four pieces brass tubing will fill remov able weights Fill two about halfway lead completely fill other two A6-in brass tube 5-in long filled lead will weigh 46 oz Two tubes course will weigh 92 oz wing tube extended 7-in total weight added will about 138 oz Lay main inner wine nanel building board add top LE sheeting completely dry raise shim center panels until tip panels laying building board add outer top sheeting Befrre have pins added will need check outer panel washout Twist tip panel until tip TE between /x 3/6-in higher dihedral break set add additional pins sheeting needed Add center panel fairing sheet tween spar TE bottom side Add lock balsa between WI W2 over A-in GD rear wing wire tube hole wing half Now have add -in GD brass tube through -in hole /6 sq balsa supportat proper angle Heres Remove rear -in brass wing tube fuselage Install wing half main wing wire Using long extension drill /x-in tube very coarse teeth filed end run through fuselage fairing blocks -in hole nlv rib WI Y 2nd drill tho 3/ n block until drill goes through Rib W2 Remove wing half drill op posite half same way Add little glue brass tubing -in GD l/2-in length install hole now ready add top center fairing sheet ing cap strips wing tip block wing now complete except sanding covering OPTIONAL WEBBING Its important use spar webbing Installing webs between spars best though could glue edges shown Stabilator stab halves built almost flat sanded final shape Lay down bottom one-piece spar over drawing Cut ribs four -Ply eight /6 sheet balsa -in high Notch top bottom spars Drill Continued page 129 October 1983 37 entire tail section ready covering fitted together early preview sections easy build have good strength though lightweight beauty Scooter Two-Meter Sailplane form finish match its truly outstanding flight qualities Wing leading edge pin striping certainly decorative also thought functional least some amount turbulating effect briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 129
I SEVERAL MONTHS AGO read some claim Two-Meter RC Sail plane class dying out very popular dont know writer got source because everywhere go getting bigger ever 1982 Nats no exception Two-Meter event entries other Sailplane class several new kits size market neat designs coming out month saw some beautiful TwoMeter multi-channeled Sailplanes aile rons 1982 Nats looked number well-known outstanding pilots fly against figured Scooter best could least Scooter did its part placing first event Sailplane designed com pete hot F3B World Championship class wings built V dihedral ailerons would very com petitive does move out fastjust what designed John Gunsaullus St Petersburg FL has won several Two-Meter contests Scooter including first place 1981 Deep South Championships also fastest time recent F3B qualifying trials semi-finals flying against some excellent FAI-type aircraft really want good testimonial talk Tom Con nelly St Petersburg FL recent wins 30 Model Aviation bli surfaces removed easy packing Scooter will fit smallest com pact autos rudder removed model will fit within box just 42 long Left Every effort has made assure clean lines low drag wing-fuselage joint still simplicity Note fuselage top between wing panels airfoil-shaped Right An optional canopy arrangement has slotted wing spacer block ~snaps~ over brass wing wire tube Canopy removed can see bulkhead-mounted switch outer pushrod housing also snaps bulkhead slots Left Another view assembled optional canopy spacer block glued together simple spring-loaded pin holds down front canopy Right Wing tips simple clean Tip block shaped seine airfoil tapered rather sharp outer edge Left Extra weight windy days added inserting lead-filled partly filled brass tubes receiving holes wing Tube shown filled 410 lead slugs gun shop Right Look angle clean lines between wings fuselage obvious flying Scooter Two-Meter Unlimited classes have quickly taken him out Sportsman class Ex pert Ed Wright Jr Tampa FL has also won several first places including 1981 exceptionally easy fly Scooter Tangerine Championships worth work takes build First place get out model what put 1982 Nats against some really hot ultimate competition still competition best proof can give October 1983 31 Left Special wire hook used pulling wing-retaining rubberbands through fuselage its used hook rubber onto eye hook other wing panel Right Tail section straightforward Rudder area larger normal improve response low speeds Left Stabilator halves held place 4-40 setscrews aluminum wheel collars Note Allen wrench projecting stab Right tow hook homemade author extruded aluminum T-shaped stock commercial varieties could used General few things should shouldnt Dont use twist drill drill holes holes will drift off-center usually come out fuzzy Use drill tem plate guide piece brass tubing cutting edge filed form small teeth Use good aliphatic resin glue balsa parts fast cyanoacrylate CyA special areas good slow-drying epoxy high-strength plywood areas Dont build directly plan Cover plastic like Saran Wrap Afteryou have covered model like MonoKote save clear plastic backing lay over drawing building next model Select wood carefully Use wing spars have straight grain select ing sheeting wings use lighter wood outer panels heavier wood center Use light medium stab rudder Use lots elbow grease sandpaper finishing Templates Fabricate wing stabilizer templates before build anything else usually use A6 plywood A2 plywood Left Illustrated method drilling through fuselage ply wing rib hole balsa wing blockto insert rear wing wire tube proper dihedral angle Right front fuselage earlier version side-mounted switch various sizes brass tubing notches filed ends form cutting edges used drilling holespreferable twist drills 32 Model Aviation CHUCK WOOD l4ank ClarkA WOOD CHIP LETSGETSERIOUSCHUCk BILL THOTYOUD ANT WEALL-SUTWHATY TELL DON TOTy TV- THATLL YOUE NOT LEAVNGTHESeHEVeRA5KTRIFIC YOUR SIMMICK PUT I-MTO5LEEP DONTTY I/4SO BALSA FIN RUDDEI/4X /2 RUDDER TE HITOIC HALLS L*JTIL GIMMICkYOLhNOW WEIALL KNXK -SRULLTOOUTGUESS MLITTLE PILOT S TOPANDLEDGE YOU TELL TE 6AD LAMA SHOW BIZ- IEE N VA Sfl UP HERE HOW COME YOU -FULLA E IS cHIPr1/16 X /4 DIAGONALS LITTLe t pjI5H IT NI6HT WITH0 HES NOTA TA COMPUTE HE NOW/S BUT 1/IGRIBS I/8RIBS WATALKING DULLES1/32 PLYWOOD BOX NFR LAENCLOSES 1/16 PLYWOOD HORN AND I/B BRASS RODS N/ I- X 5/BELEVTOR T E I/B BALSA SIDES7 TOPANDBOITOM I/B PLYWOOD SIDES 3/16 X 1/4 L E1/16 X 1/4 SPARS TOP AND BOTTOM WITH 1/8 50 SPACERS BETWEEN /4 BALSA BLOCKS BETWEEN WING SPARS 1/16 X 1/4 CAPS ALL RIBS TCA/ BOTTOM 1/16 WEBS BETWEEN ALL SPARS I/BX 1/4 SPRUCE SPARS TOPAND BOlTOM BOTH WING PANELS SO TTPLFTBLOCK SO T E fl NT BRACE TUBEI/2DIA WEIGHT TUBE BRASS TUBE 1/16 PLYWOOD /4 BALSA BLOCKS 4 BALSA BLOCK SPAR WEBS WEEN SPARS TO HERE HOLLOW BLOCKFRONTAND BJ1/32 PLYWOOD BRACE JaNS WNG PANELS AT SPARS I/B PLYWOOD SIDE3/B BALSA SHEETFILL UNDER/OVER TUBE WITHTOP AND BOTTOM BOll-I PANELS ND BOTTOM PANELSWING FAIRINGSSPRUCE AND MICRO-BALLOONS 1/16 WEBS BETWEEN ALL SPARS easier cut Cut out master wing airfoil template first dont drill holes yet Next cut WI wing rib template should /16-in smaller thafl master airfoil template Drill WI first locate clamp WI master airfoil template drill master now have accurate master lay fuselage sides drilling wing wire tube holes proper location also serves contour top fuselage airfoil shape However dont build wing fuselage yet Construct stab drill rib template next stab template used drill stab ribs also stab horn Vertical fin rudder Cut out two A2 ply horn box sides shaded area shown drawing Drill slot stab bearing rear wire clearance Lay side ply box down build Y16-in spacer frame around outside edge add second side should add up / rudder thickness okay remove top side adding horn bearing horn glue top ply section place Quickly stick piece 3A2-in wire stab-horn bearing Using square make sure sides aligned wire 900 sides horn box dont want crooked stab relationship rudder Also make sure horn remains free movable dry sand front back square lay drawing construct ver tical fin movable rudder around horn box Leave small dorsal fin off time Since rudder parts ribs -in wide trailing edge stock around Yb-in add trailing edge shim ming center ribs After glue has dried can trim sand ribs top bottom fair trailing edge can now construct fuselage Fuselage recommend forward fu selage sides plus bulkheads Wl wing ribs four stab ribs cut Lite-Ply plywood available Sig light weight easy cuteven jigsaw Whether use Lite-Ply regular ply cut fuselage sides shown Use ply forward splice balsa splice rear Use master airfoil template locate wing wire tube holes drill holes required Sand fuselage sides together brass wing tubes place mas ter airfoil templates will also help sand airfoil shape top fuse lage sides Cut fuselage bottom also ply forward one-third balsa rear two-thirds Next cut out bulkheads nose block nose block constructed three pieces -in basswood center section cut out can add lead ballast Taper outside nose block shown plans Lay fuselage bottom drawing Glue nose block bulkheads set rudder horn box assembly place Notice fin leading edge just barely rests Bulkhead F7 part dry add stab pushrod outer housing through bulkheads ending F7 Add inner pushrod metal horn clevis Make sure pushrod horn operate freely Add fuselage sides Install piece -in brass tubing through wing wire tube holes help align sides usually make template piece 3-in-sq balsa sheet cutting side about 910 Use template check angle between tubing fuselage sides fuselage straight F2 F7 angle same both sides clamp sides around F3 area Clamp fuselage sides lower ply box area rudder small C-clamp clothespins Finally clamp sides nose block Add other clamps and/or pins required use slow-drying epoxy Hobby Poxy #2 sides allows enough time align everything before glue sets up can now add rudder pushrod etc Note both outer pushrod housings inner rods place can snapped up out F2 later insertion radio receiver may want run antenna tube through fuselage side usually run antenna tube 3A6-in hole HRI/4 BALSA AIBOTTOII 1r SHOWN FI 0 RIGHT WING Pt II --F 111111111 OPT AWNCRIMPF____ II WHEELENDS COLLAR IL. I I/4LB00 SHEETTUBE[7}o Li ROOT RIBPOLY BREAK TEMPLATETEMPLATE 1 FII V4 TD LITE LY / POLYNEORA& BF~ I/lB 1/4 VBOCL BALSA SPOR BET WNRS N 5PA4I5/55 6 E WISENOTEAREAINSERTE BLAIT BE S/3D D-B/W TO PORN D-I/D FILL AREA WITh SPRUCE B MICRO BALLOONS 5/B BALSA TRAIUNGI EDGEI 3/lA 1/4E-E LEADING EDGES JEAIRS.Li LaLSJLBe F 1/4 50 BALSA P.- TAIL TYP CROSS SECT EPOSY BEAD FRlIh1I -3 PIECES OF S/jIq - SSWOOD CnE.- SECTION CUT OUT WW4 CANOPY NORMALLY NOSESOWN WITh EYE AOl FOREIGHT B RUBBER BARED WEIGHT BALSA ABEA- S/A IAIEFLATBATTERYjYSABEAF PACESI TOW H A-A I-tiNCAN0PY B WING SPACER BLOCKS MAY BE GLEES TOGETIER AFER FORABBO fuselage side after covering slit MonoKote reach small hook pull out antenna Cut out two wing fairing blocks 34 Model Aviation TUBE Left Wing spacer block sits bulkhead wing wire tube After covering rear block hinged 3M tape covering material Front ot block held place canopy Right Wing spacer block canopy glued together held down rubberband eye hooks FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 1—I/IE BALGA TRAILING EDGE II~-IVt _____________________ _________________________ _________________________Ii 1II -B IIAl r 11 II I II i1 LII 11I-~IIII II1-iiIi I-u - II BALOA 0B OO BRASS TUBE WING EYE HOOKS / RIBS 3-I/2 IZ 2 EACH 3-1HLONS 2 EACH H- S/4 LONS ROOT WEBS [v32][b-2-10-1-10]]V F --F--II itII RIGHT WING PLAN OUTBOARD PANEL IIII IOR NOTE PRE-ULUE ALL WING WEBS BEFORE FINAL IIi GLUING III -II -I- F OTE RASP-IN SLOTS FOR P/H 0 GAIN ACCESS TO RECEIVERALL WINB SHEETING IS AREAVW BALSA V F-3 P-4 F-5 F-H __ Ti 7K II H LEFT /ING PIAN INBOARD PANEL W-IN-SH-2N-3N-SH-SW-SW-3W-3 SWB BALSA WEB BAGSAERTICAL GRAIN EIB PLY/Bo /4 SPRUCE SPARS GEIGHT TUBEI/BBALSA WEBI VERT GRAIN/8 BALSA VB/8 fSHEETVERY GRAIN 9FLSAWY STOPAGO RIB H-H AFTER PANELS ARE JOINEE W-4 V4BALSA WEB IN POLY AREA NOTE POLYHEIWAL BRACES lAST SHOWN -f I/4SO EALSA LEADING EDGE BEVELEGAfEAESSE OF TOP-YE AEDGE OF BOTTOM-YE— B--NOT SHOWN ON L/H PANELS OUTBOARD PANEL oR-HA-A-HA-SN-IDW-I LEFT WING PLAN W-5 VB BALSA WEB HERE TO YIP 032 10 S1600 3/IN 5/Bo1o6 /16 PLT BRASS OR ALUM TUBE HORNIS 0 5/5200 GAO TUBE 2-5/4MASTER AIRFOIL-3/52 Ox Soo %5GU5LS TUBE B-"/000 TEMPLATEIS TIVEHORS BEARING ___S-VS WING POLYHEDRAL DETA L WIRE BOGS REOLIHEE WRO7/52o 7TYPICAL CROSS SECTIONI/IA F-7U I5/52 4-VS STAB 3/32 S-SWY2ATZI CANOPY HINGEVRPLY5/52 SNAP SYSTEM B-2S4 B-S 1/16 BALSA 1261 Il/ilW284 I/RBALSA RI -111 -Il FINlIIIiWEIGHT GRAIN IINLAY BET SIDESIAABB1/4 SHEETCOVEREG902 ESPY2902 LEAVE FUSELAGE COMAER SHARP AT THIS . WING LOAONU POINT PROGRESBOELY INCREASE RADIUS ruLELAGE SIE VIEWENE ELEVATOR SAYER7-z oz AFT APPROX H IS 3/52 BP20 TUBE IS BUKHEAO AIRING--C2LFTSTAB HORN BOG-I/16 OUThINE 3Fi0—A5/16 BALSA B/ V32 AFT SECTIIBO ----PLY TO FORM I/B I---I/B BALSA TOP--S- 2F3F-HSIDED B BOTTOM -T[j V /H I/O HICK BGS F-SED-TOP UI-IFETISIS S SPUPO / I/B 05 BRASS TUBE/52 PLY IF1 DOUBLER ALL CORNERS 5/52 R EUCEPT AU NOTED C USE SMALL RUDDER RUSSER B FIN ScOT NOTROOOER 0/0 /LROHOL SHOWN ON TOP VIEWEXITOLEYT TAIL GRID MASTER AIBEDIL TMPLATE CUT LEARANCE FORWING FAIRIRUS FROM S/B WOOD SHEET RING HOOKS TOP VIEW TES OUTLINE OF FUSELAGE SIGES ANTENNA EVIT SCOOTER METER NE D BY LE ON K INCAID IBBUN0 f TRACING BY JOE DENARCO %I-in basswood using master airfoil template will need tapered ap proximately /4n per top view plans wing tubes inserted through fuselage add fairing blocks check taper Trim inside surface blocks until outsides parallel blocks fit flush against fuselage parallel outside wing butts can glue place Add rear top side fuselage cross-grain sheeting tween sides wing fairing blocks October 1983 35 RD PANEL Left Wing tip ribs cut proper length stacked piece spar stock ready shaping tops per templates outer sides Right wing tip center panels joined together dihedral braces can easily installed photos author Left The wing panels have built nd sanded smooth Theyre now ready covering Note tips finished thin edge can seen wing half left Right stabilator horn place 1/32 ply horn box cover ready added Fabricate wing spacer block fit tween sides rest top F2 wing tube Sand top block airfoil shape fuselage sides fairing blocks After spacer block sanded shape cut carve sand canopy block fit over radio area neatly over spacer block Glue scrap X p approxi mately 1-in long across bottom canopy block several places properly locate canopy fuselage canopy block wing spacer block may glued togetheror left separate canopy can held place eye hooks rubberbands alternate method shown drawing may used Add small /4 sheet dorsal fin fuselage ready sand Wings layout plan may seem little strange you would rather cut up drawing place tip panels ends center panels can build complete wing halves together thats fine arranged panels way did two reasons First both tip panels can built one-piece 36-in bottom spar 36-in pieces complete rest tip panels minimum scrap same true center panels except 48-in wood used Second leave main x s piece sandwich /4-in brass wing wire tubes between spars helps keep tubes nice straight will notice bottom Wl same shape WI Consequently ribs can cut WI template guide Make two ribs Lite-Ply six /s balsa 26 Vis balsa Four teen 26 / s-in ribs tapered tip panels stack taper 14 tip ribs Select seven left panel seven right panel Using thin-line felt-tip pen mark two ribs W5 two W6 etc through WI Lay bottom spar drawing Insert rib its correct posi tion felt-tip pen hurk ribs leading edge LE trailing edge TE excess should cut off Take two WI ribs contour top airfoil shown drawing Using short piece x stock stack ribs W4 through WI contour tops Ribs W5 through W 10 same op posite panel will have re-cut top spar notch tapered ribs always assemble center panels first Yes slight bit undercamber wing dont worry about can build wing right over draving airfoil rests main spar tip trailing edge Cut leading trailing edge sheeting proper length panel Due leading edge contouring bending over ribs make sheeting about A-in wider shown drawing can cut off excess after assembly Put together both center panels same time following order Lay bottom lead ing edge sheeting drawing lining up spar Lay 42-in one-piece uncut spar top sheeting proper place can CyA-glue spar sheetingor use white glue Lay dont pin down bottom TB place remember bevel first Add W3 ribs glue spar sheeting TE Add WI ply rib brass tubing same time tilt rib 3V0 use template end brass tubing should just touch bottom spar see cross section DD important brass tube no longer shorter indicated will change angle Add top piece spar both panels Before gluing check top straightedge Make sure brass tubing squarely tween top bottom spars just touching bottom spar Add drop CyA hold tubing place Add A-in-width vertical-grain balsa webbing between end tube Rib W3 Use either scrap wood and/or micro balloons glue fill cavities side top bottom tubes Add As ply brace side tube area will sandwich tubes between spars Cut trim W2 ribs fit Make sure aft part W2 ribs level top spar necessary add Vis-in shims under W2s temporarily substitute As-in fairing sheet will added later Add vertical-grain webs between spars time may want add webs before add top spar prefer fit time whatever feel best razor plane shape LB shown add front face ribs Now will raise bottom sheeting ribsby shimming can use either long ruler TB stock good straight stock around A-in thick usually two three steps gluing CyA go 36 Model Aviation Left The stabilator rudder ready cover one-piece hinge pin used may visible magazine reproduction picture allows easy rudder removal case repairs needed Right vertical fin constructed around completed horn box fuselage sides will sandwich both sides lower fin horn box assembly provide strong stabilator support Run ruler between drawing LE sheeting until sheeting shimmed tightly against ribs Continue closing gap shims gluing until bottom sheeting completely glued ribs LE can now cut main spars center panels can moved sepa rately Note Leave off top sheeting time Due undercambered airfoil tip ribs will touching bottom TE Remove panels building board glue TE ribs dry add top TE sheeting Assemble tip panels same way center panels After panels completed except top sheeting use sanding block sand panel ends poly break until fit together perfectly Lay center panel building board shim tip panel proper angle butt-glue panels together Wipe away excess glue dry add dihedral braces side main spars back sid LE Trim taper I-in length spruce /x sq x /4 fit hollow section TE poly break strengthen joint Cut trim add W4 Use forward halves two extra W2 ribs between spars leading edge inserted against innermost W3 weight tube support Youll need two pieces /-in GD aluminum fiberglass tubing brass too heavy least 5-in long install through WI W2 ribs glue place Cardboard tubes model rocket motors would also work well Find best-fitting brass tubing avail able hobby shops will go inside aluminum tubes Cut about four pieces brass tubing will fill remov able weights Fill two about halfway lead completely fill other two A6-in brass tube 5-in long filled lead will weigh 46 oz Two tubes course will weigh 92 oz wing tube extended 7-in total weight added will about 138 oz Lay main inner wine nanel building board add top LE sheeting completely dry raise shim center panels until tip panels laying building board add outer top sheeting Befrre have pins added will need check outer panel washout Twist tip panel until tip TE between /x 3/6-in higher dihedral break set add additional pins sheeting needed Add center panel fairing sheet tween spar TE bottom side Add lock balsa between WI W2 over A-in GD rear wing wire tube hole wing half Now have add -in GD brass tube through -in hole /6 sq balsa supportat proper angle Heres Remove rear -in brass wing tube fuselage Install wing half main wing wire Using long extension drill /x-in tube very coarse teeth filed end run through fuselage fairing blocks -in hole nlv rib WI Y 2nd drill tho 3/ n block until drill goes through Rib W2 Remove wing half drill op posite half same way Add little glue brass tubing -in GD l/2-in length install hole now ready add top center fairing sheet ing cap strips wing tip block wing now complete except sanding covering OPTIONAL WEBBING Its important use spar webbing Installing webs between spars best though could glue edges shown Stabilator stab halves built almost flat sanded final shape Lay down bottom one-piece spar over drawing Cut ribs four -Ply eight /6 sheet balsa -in high Notch top bottom spars Drill Continued page 129 October 1983 37 entire tail section ready covering fitted together early preview sections easy build have good strength though lightweight beauty Scooter Two-Meter Sailplane form finish match its truly outstanding flight qualities Wing leading edge pin striping certainly decorative also thought functional least some amount turbulating effect briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 129
I SEVERAL MONTHS AGO read some claim Two-Meter RC Sail plane class dying out very popular dont know writer got source because everywhere go getting bigger ever 1982 Nats no exception Two-Meter event entries other Sailplane class several new kits size market neat designs coming out month saw some beautiful TwoMeter multi-channeled Sailplanes aile rons 1982 Nats looked number well-known outstanding pilots fly against figured Scooter best could least Scooter did its part placing first event Sailplane designed com pete hot F3B World Championship class wings built V dihedral ailerons would very com petitive does move out fastjust what designed John Gunsaullus St Petersburg FL has won several Two-Meter contests Scooter including first place 1981 Deep South Championships also fastest time recent F3B qualifying trials semi-finals flying against some excellent FAI-type aircraft really want good testimonial talk Tom Con nelly St Petersburg FL recent wins 30 Model Aviation bli surfaces removed easy packing Scooter will fit smallest com pact autos rudder removed model will fit within box just 42 long Left Every effort has made assure clean lines low drag wing-fuselage joint still simplicity Note fuselage top between wing panels airfoil-shaped Right An optional canopy arrangement has slotted wing spacer block ~snaps~ over brass wing wire tube Canopy removed can see bulkhead-mounted switch outer pushrod housing also snaps bulkhead slots Left Another view assembled optional canopy spacer block glued together simple spring-loaded pin holds down front canopy Right Wing tips simple clean Tip block shaped seine airfoil tapered rather sharp outer edge Left Extra weight windy days added inserting lead-filled partly filled brass tubes receiving holes wing Tube shown filled 410 lead slugs gun shop Right Look angle clean lines between wings fuselage obvious flying Scooter Two-Meter Unlimited classes have quickly taken him out Sportsman class Ex pert Ed Wright Jr Tampa FL has also won several first places including 1981 exceptionally easy fly Scooter Tangerine Championships worth work takes build First place get out model what put 1982 Nats against some really hot ultimate competition still competition best proof can give October 1983 31 Left Special wire hook used pulling wing-retaining rubberbands through fuselage its used hook rubber onto eye hook other wing panel Right Tail section straightforward Rudder area larger normal improve response low speeds Left Stabilator halves held place 4-40 setscrews aluminum wheel collars Note Allen wrench projecting stab Right tow hook homemade author extruded aluminum T-shaped stock commercial varieties could used General few things should shouldnt Dont use twist drill drill holes holes will drift off-center usually come out fuzzy Use drill tem plate guide piece brass tubing cutting edge filed form small teeth Use good aliphatic resin glue balsa parts fast cyanoacrylate CyA special areas good slow-drying epoxy high-strength plywood areas Dont build directly plan Cover plastic like Saran Wrap Afteryou have covered model like MonoKote save clear plastic backing lay over drawing building next model Select wood carefully Use wing spars have straight grain select ing sheeting wings use lighter wood outer panels heavier wood center Use light medium stab rudder Use lots elbow grease sandpaper finishing Templates Fabricate wing stabilizer templates before build anything else usually use A6 plywood A2 plywood Left Illustrated method drilling through fuselage ply wing rib hole balsa wing blockto insert rear wing wire tube proper dihedral angle Right front fuselage earlier version side-mounted switch various sizes brass tubing notches filed ends form cutting edges used drilling holespreferable twist drills 32 Model Aviation CHUCK WOOD l4ank ClarkA WOOD CHIP LETSGETSERIOUSCHUCk BILL THOTYOUD ANT WEALL-SUTWHATY TELL DON TOTy TV- THATLL YOUE NOT LEAVNGTHESeHEVeRA5KTRIFIC YOUR SIMMICK PUT I-MTO5LEEP DONTTY I/4SO BALSA FIN RUDDEI/4X /2 RUDDER TE HITOIC HALLS L*JTIL GIMMICkYOLhNOW WEIALL KNXK -SRULLTOOUTGUESS MLITTLE PILOT S TOPANDLEDGE YOU TELL TE 6AD LAMA SHOW BIZ- IEE N VA Sfl UP HERE HOW COME YOU -FULLA E IS cHIPr1/16 X /4 DIAGONALS LITTLe t pjI5H IT NI6HT WITH0 HES NOTA TA COMPUTE HE NOW/S BUT 1/IGRIBS I/8RIBS WATALKING DULLES1/32 PLYWOOD BOX NFR LAENCLOSES 1/16 PLYWOOD HORN AND I/B BRASS RODS N/ I- X 5/BELEVTOR T E I/B BALSA SIDES7 TOPANDBOITOM I/B PLYWOOD SIDES 3/16 X 1/4 L E1/16 X 1/4 SPARS TOP AND BOTTOM WITH 1/8 50 SPACERS BETWEEN /4 BALSA BLOCKS BETWEEN WING SPARS 1/16 X 1/4 CAPS ALL RIBS TCA/ BOTTOM 1/16 WEBS BETWEEN ALL SPARS I/BX 1/4 SPRUCE SPARS TOPAND BOlTOM BOTH WING PANELS SO TTPLFTBLOCK SO T E fl NT BRACE TUBEI/2DIA WEIGHT TUBE BRASS TUBE 1/16 PLYWOOD /4 BALSA BLOCKS 4 BALSA BLOCK SPAR WEBS WEEN SPARS TO HERE HOLLOW BLOCKFRONTAND BJ1/32 PLYWOOD BRACE JaNS WNG PANELS AT SPARS I/B PLYWOOD SIDE3/B BALSA SHEETFILL UNDER/OVER TUBE WITHTOP AND BOTTOM BOll-I PANELS ND BOTTOM PANELSWING FAIRINGSSPRUCE AND MICRO-BALLOONS 1/16 WEBS BETWEEN ALL SPARS easier cut Cut out master wing airfoil template first dont drill holes yet Next cut WI wing rib template should /16-in smaller thafl master airfoil template Drill WI first locate clamp WI master airfoil template drill master now have accurate master lay fuselage sides drilling wing wire tube holes proper location also serves contour top fuselage airfoil shape However dont build wing fuselage yet Construct stab drill rib template next stab template used drill stab ribs also stab horn Vertical fin rudder Cut out two A2 ply horn box sides shaded area shown drawing Drill slot stab bearing rear wire clearance Lay side ply box down build Y16-in spacer frame around outside edge add second side should add up / rudder thickness okay remove top side adding horn bearing horn glue top ply section place Quickly stick piece 3A2-in wire stab-horn bearing Using square make sure sides aligned wire 900 sides horn box dont want crooked stab relationship rudder Also make sure horn remains free movable dry sand front back square lay drawing construct ver tical fin movable rudder around horn box Leave small dorsal fin off time Since rudder parts ribs -in wide trailing edge stock around Yb-in add trailing edge shim ming center ribs After glue has dried can trim sand ribs top bottom fair trailing edge can now construct fuselage Fuselage recommend forward fu selage sides plus bulkheads Wl wing ribs four stab ribs cut Lite-Ply plywood available Sig light weight easy cuteven jigsaw Whether use Lite-Ply regular ply cut fuselage sides shown Use ply forward splice balsa splice rear Use master airfoil template locate wing wire tube holes drill holes required Sand fuselage sides together brass wing tubes place mas ter airfoil templates will also help sand airfoil shape top fuse lage sides Cut fuselage bottom also ply forward one-third balsa rear two-thirds Next cut out bulkheads nose block nose block constructed three pieces -in basswood center section cut out can add lead ballast Taper outside nose block shown plans Lay fuselage bottom drawing Glue nose block bulkheads set rudder horn box assembly place Notice fin leading edge just barely rests Bulkhead F7 part dry add stab pushrod outer housing through bulkheads ending F7 Add inner pushrod metal horn clevis Make sure pushrod horn operate freely Add fuselage sides Install piece -in brass tubing through wing wire tube holes help align sides usually make template piece 3-in-sq balsa sheet cutting side about 910 Use template check angle between tubing fuselage sides fuselage straight F2 F7 angle same both sides clamp sides around F3 area Clamp fuselage sides lower ply box area rudder small C-clamp clothespins Finally clamp sides nose block Add other clamps and/or pins required use slow-drying epoxy Hobby Poxy #2 sides allows enough time align everything before glue sets up can now add rudder pushrod etc Note both outer pushrod housings inner rods place can snapped up out F2 later insertion radio receiver may want run antenna tube through fuselage side usually run antenna tube 3A6-in hole HRI/4 BALSA AIBOTTOII 1r SHOWN FI 0 RIGHT WING Pt II --F 111111111 OPT AWNCRIMPF____ II WHEELENDS COLLAR IL. I I/4LB00 SHEETTUBE[7}o Li ROOT RIBPOLY BREAK TEMPLATETEMPLATE 1 FII V4 TD LITE LY / POLYNEORA& BF~ I/lB 1/4 VBOCL BALSA SPOR BET WNRS N 5PA4I5/55 6 E WISENOTEAREAINSERTE BLAIT BE S/3D D-B/W TO PORN D-I/D FILL AREA WITh SPRUCE B MICRO BALLOONS 5/B BALSA TRAIUNGI EDGEI 3/lA 1/4E-E LEADING EDGES JEAIRS.Li LaLSJLBe F 1/4 50 BALSA P.- TAIL TYP CROSS SECT EPOSY BEAD FRlIh1I -3 PIECES OF S/jIq - SSWOOD CnE.- SECTION CUT OUT WW4 CANOPY NORMALLY NOSESOWN WITh EYE AOl FOREIGHT B RUBBER BARED WEIGHT BALSA ABEA- S/A IAIEFLATBATTERYjYSABEAF PACESI TOW H A-A I-tiNCAN0PY B WING SPACER BLOCKS MAY BE GLEES TOGETIER AFER FORABBO fuselage side after covering slit MonoKote reach small hook pull out antenna Cut out two wing fairing blocks 34 Model Aviation TUBE Left Wing spacer block sits bulkhead wing wire tube After covering rear block hinged 3M tape covering material Front ot block held place canopy Right Wing spacer block canopy glued together held down rubberband eye hooks FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 1—I/IE BALGA TRAILING EDGE II~-IVt _____________________ _________________________ _________________________Ii 1II -B IIAl r 11 II I II i1 LII 11I-~IIII II1-iiIi I-u - II BALOA 0B OO BRASS TUBE WING EYE HOOKS / RIBS 3-I/2 IZ 2 EACH 3-1HLONS 2 EACH H- S/4 LONS ROOT WEBS [v32][b-2-10-1-10]]V F --F--II itII RIGHT WING PLAN OUTBOARD PANEL IIII IOR NOTE PRE-ULUE ALL WING WEBS BEFORE FINAL IIi GLUING III -II -I- F OTE RASP-IN SLOTS FOR P/H 0 GAIN ACCESS TO RECEIVERALL WINB SHEETING IS AREAVW BALSA V F-3 P-4 F-5 F-H __ Ti 7K II H LEFT /ING PIAN INBOARD PANEL W-IN-SH-2N-3N-SH-SW-SW-3W-3 SWB BALSA WEB BAGSAERTICAL GRAIN EIB PLY/Bo /4 SPRUCE SPARS GEIGHT TUBEI/BBALSA WEBI VERT GRAIN/8 BALSA VB/8 fSHEETVERY GRAIN 9FLSAWY STOPAGO RIB H-H AFTER PANELS ARE JOINEE W-4 V4BALSA WEB IN POLY AREA NOTE POLYHEIWAL BRACES lAST SHOWN -f I/4SO EALSA LEADING EDGE BEVELEGAfEAESSE OF TOP-YE AEDGE OF BOTTOM-YE— B--NOT SHOWN ON L/H PANELS OUTBOARD PANEL oR-HA-A-HA-SN-IDW-I LEFT WING PLAN W-5 VB BALSA WEB HERE TO YIP 032 10 S1600 3/IN 5/Bo1o6 /16 PLT BRASS OR ALUM TUBE HORNIS 0 5/5200 GAO TUBE 2-5/4MASTER AIRFOIL-3/52 Ox Soo %5GU5LS TUBE B-"/000 TEMPLATEIS TIVEHORS BEARING ___S-VS WING POLYHEDRAL DETA L WIRE BOGS REOLIHEE WRO7/52o 7TYPICAL CROSS SECTIONI/IA F-7U I5/52 4-VS STAB 3/32 S-SWY2ATZI CANOPY HINGEVRPLY5/52 SNAP SYSTEM B-2S4 B-S 1/16 BALSA 1261 Il/ilW284 I/RBALSA RI -111 -Il FINlIIIiWEIGHT GRAIN IINLAY BET SIDESIAABB1/4 SHEETCOVEREG902 ESPY2902 LEAVE FUSELAGE COMAER SHARP AT THIS . WING LOAONU POINT PROGRESBOELY INCREASE RADIUS ruLELAGE SIE VIEWENE ELEVATOR SAYER7-z oz AFT APPROX H IS 3/52 BP20 TUBE IS BUKHEAO AIRING--C2LFTSTAB HORN BOG-I/16 OUThINE 3Fi0—A5/16 BALSA B/ V32 AFT SECTIIBO ----PLY TO FORM I/B I---I/B BALSA TOP--S- 2F3F-HSIDED B BOTTOM -T[j V /H I/O HICK BGS F-SED-TOP UI-IFETISIS S SPUPO / I/B 05 BRASS TUBE/52 PLY IF1 DOUBLER ALL CORNERS 5/52 R EUCEPT AU NOTED C USE SMALL RUDDER RUSSER B FIN ScOT NOTROOOER 0/0 /LROHOL SHOWN ON TOP VIEWEXITOLEYT TAIL GRID MASTER AIBEDIL TMPLATE CUT LEARANCE FORWING FAIRIRUS FROM S/B WOOD SHEET RING HOOKS TOP VIEW TES OUTLINE OF FUSELAGE SIGES ANTENNA EVIT SCOOTER METER NE D BY LE ON K INCAID IBBUN0 f TRACING BY JOE DENARCO %I-in basswood using master airfoil template will need tapered ap proximately /4n per top view plans wing tubes inserted through fuselage add fairing blocks check taper Trim inside surface blocks until outsides parallel blocks fit flush against fuselage parallel outside wing butts can glue place Add rear top side fuselage cross-grain sheeting tween sides wing fairing blocks October 1983 35 RD PANEL Left Wing tip ribs cut proper length stacked piece spar stock ready shaping tops per templates outer sides Right wing tip center panels joined together dihedral braces can easily installed photos author Left The wing panels have built nd sanded smooth Theyre now ready covering Note tips finished thin edge can seen wing half left Right stabilator horn place 1/32 ply horn box cover ready added Fabricate wing spacer block fit tween sides rest top F2 wing tube Sand top block airfoil shape fuselage sides fairing blocks After spacer block sanded shape cut carve sand canopy block fit over radio area neatly over spacer block Glue scrap X p approxi mately 1-in long across bottom canopy block several places properly locate canopy fuselage canopy block wing spacer block may glued togetheror left separate canopy can held place eye hooks rubberbands alternate method shown drawing may used Add small /4 sheet dorsal fin fuselage ready sand Wings layout plan may seem little strange you would rather cut up drawing place tip panels ends center panels can build complete wing halves together thats fine arranged panels way did two reasons First both tip panels can built one-piece 36-in bottom spar 36-in pieces complete rest tip panels minimum scrap same true center panels except 48-in wood used Second leave main x s piece sandwich /4-in brass wing wire tubes between spars helps keep tubes nice straight will notice bottom Wl same shape WI Consequently ribs can cut WI template guide Make two ribs Lite-Ply six /s balsa 26 Vis balsa Four teen 26 / s-in ribs tapered tip panels stack taper 14 tip ribs Select seven left panel seven right panel Using thin-line felt-tip pen mark two ribs W5 two W6 etc through WI Lay bottom spar drawing Insert rib its correct posi tion felt-tip pen hurk ribs leading edge LE trailing edge TE excess should cut off Take two WI ribs contour top airfoil shown drawing Using short piece x stock stack ribs W4 through WI contour tops Ribs W5 through W 10 same op posite panel will have re-cut top spar notch tapered ribs always assemble center panels first Yes slight bit undercamber wing dont worry about can build wing right over draving airfoil rests main spar tip trailing edge Cut leading trailing edge sheeting proper length panel Due leading edge contouring bending over ribs make sheeting about A-in wider shown drawing can cut off excess after assembly Put together both center panels same time following order Lay bottom lead ing edge sheeting drawing lining up spar Lay 42-in one-piece uncut spar top sheeting proper place can CyA-glue spar sheetingor use white glue Lay dont pin down bottom TB place remember bevel first Add W3 ribs glue spar sheeting TE Add WI ply rib brass tubing same time tilt rib 3V0 use template end brass tubing should just touch bottom spar see cross section DD important brass tube no longer shorter indicated will change angle Add top piece spar both panels Before gluing check top straightedge Make sure brass tubing squarely tween top bottom spars just touching bottom spar Add drop CyA hold tubing place Add A-in-width vertical-grain balsa webbing between end tube Rib W3 Use either scrap wood and/or micro balloons glue fill cavities side top bottom tubes Add As ply brace side tube area will sandwich tubes between spars Cut trim W2 ribs fit Make sure aft part W2 ribs level top spar necessary add Vis-in shims under W2s temporarily substitute As-in fairing sheet will added later Add vertical-grain webs between spars time may want add webs before add top spar prefer fit time whatever feel best razor plane shape LB shown add front face ribs Now will raise bottom sheeting ribsby shimming can use either long ruler TB stock good straight stock around A-in thick usually two three steps gluing CyA go 36 Model Aviation Left The stabilator rudder ready cover one-piece hinge pin used may visible magazine reproduction picture allows easy rudder removal case repairs needed Right vertical fin constructed around completed horn box fuselage sides will sandwich both sides lower fin horn box assembly provide strong stabilator support Run ruler between drawing LE sheeting until sheeting shimmed tightly against ribs Continue closing gap shims gluing until bottom sheeting completely glued ribs LE can now cut main spars center panels can moved sepa rately Note Leave off top sheeting time Due undercambered airfoil tip ribs will touching bottom TE Remove panels building board glue TE ribs dry add top TE sheeting Assemble tip panels same way center panels After panels completed except top sheeting use sanding block sand panel ends poly break until fit together perfectly Lay center panel building board shim tip panel proper angle butt-glue panels together Wipe away excess glue dry add dihedral braces side main spars back sid LE Trim taper I-in length spruce /x sq x /4 fit hollow section TE poly break strengthen joint Cut trim add W4 Use forward halves two extra W2 ribs between spars leading edge inserted against innermost W3 weight tube support Youll need two pieces /-in GD aluminum fiberglass tubing brass too heavy least 5-in long install through WI W2 ribs glue place Cardboard tubes model rocket motors would also work well Find best-fitting brass tubing avail able hobby shops will go inside aluminum tubes Cut about four pieces brass tubing will fill remov able weights Fill two about halfway lead completely fill other two A6-in brass tube 5-in long filled lead will weigh 46 oz Two tubes course will weigh 92 oz wing tube extended 7-in total weight added will about 138 oz Lay main inner wine nanel building board add top LE sheeting completely dry raise shim center panels until tip panels laying building board add outer top sheeting Befrre have pins added will need check outer panel washout Twist tip panel until tip TE between /x 3/6-in higher dihedral break set add additional pins sheeting needed Add center panel fairing sheet tween spar TE bottom side Add lock balsa between WI W2 over A-in GD rear wing wire tube hole wing half Now have add -in GD brass tube through -in hole /6 sq balsa supportat proper angle Heres Remove rear -in brass wing tube fuselage Install wing half main wing wire Using long extension drill /x-in tube very coarse teeth filed end run through fuselage fairing blocks -in hole nlv rib WI Y 2nd drill tho 3/ n block until drill goes through Rib W2 Remove wing half drill op posite half same way Add little glue brass tubing -in GD l/2-in length install hole now ready add top center fairing sheet ing cap strips wing tip block wing now complete except sanding covering OPTIONAL WEBBING Its important use spar webbing Installing webs between spars best though could glue edges shown Stabilator stab halves built almost flat sanded final shape Lay down bottom one-piece spar over drawing Cut ribs four -Ply eight /6 sheet balsa -in high Notch top bottom spars Drill Continued page 129 October 1983 37 entire tail section ready covering fitted together early preview sections easy build have good strength though lightweight beauty Scooter Two-Meter Sailplane form finish match its truly outstanding flight qualities Wing leading edge pin striping certainly decorative also thought functional least some amount turbulating effect briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 129
I SEVERAL MONTHS AGO read some claim Two-Meter RC Sail plane class dying out very popular dont know writer got source because everywhere go getting bigger ever 1982 Nats no exception Two-Meter event entries other Sailplane class several new kits size market neat designs coming out month saw some beautiful TwoMeter multi-channeled Sailplanes aile rons 1982 Nats looked number well-known outstanding pilots fly against figured Scooter best could least Scooter did its part placing first event Sailplane designed com pete hot F3B World Championship class wings built V dihedral ailerons would very com petitive does move out fastjust what designed John Gunsaullus St Petersburg FL has won several Two-Meter contests Scooter including first place 1981 Deep South Championships also fastest time recent F3B qualifying trials semi-finals flying against some excellent FAI-type aircraft really want good testimonial talk Tom Con nelly St Petersburg FL recent wins 30 Model Aviation bli surfaces removed easy packing Scooter will fit smallest com pact autos rudder removed model will fit within box just 42 long Left Every effort has made assure clean lines low drag wing-fuselage joint still simplicity Note fuselage top between wing panels airfoil-shaped Right An optional canopy arrangement has slotted wing spacer block ~snaps~ over brass wing wire tube Canopy removed can see bulkhead-mounted switch outer pushrod housing also snaps bulkhead slots Left Another view assembled optional canopy spacer block glued together simple spring-loaded pin holds down front canopy Right Wing tips simple clean Tip block shaped seine airfoil tapered rather sharp outer edge Left Extra weight windy days added inserting lead-filled partly filled brass tubes receiving holes wing Tube shown filled 410 lead slugs gun shop Right Look angle clean lines between wings fuselage obvious flying Scooter Two-Meter Unlimited classes have quickly taken him out Sportsman class Ex pert Ed Wright Jr Tampa FL has also won several first places including 1981 exceptionally easy fly Scooter Tangerine Championships worth work takes build First place get out model what put 1982 Nats against some really hot ultimate competition still competition best proof can give October 1983 31 Left Special wire hook used pulling wing-retaining rubberbands through fuselage its used hook rubber onto eye hook other wing panel Right Tail section straightforward Rudder area larger normal improve response low speeds Left Stabilator halves held place 4-40 setscrews aluminum wheel collars Note Allen wrench projecting stab Right tow hook homemade author extruded aluminum T-shaped stock commercial varieties could used General few things should shouldnt Dont use twist drill drill holes holes will drift off-center usually come out fuzzy Use drill tem plate guide piece brass tubing cutting edge filed form small teeth Use good aliphatic resin glue balsa parts fast cyanoacrylate CyA special areas good slow-drying epoxy high-strength plywood areas Dont build directly plan Cover plastic like Saran Wrap Afteryou have covered model like MonoKote save clear plastic backing lay over drawing building next model Select wood carefully Use wing spars have straight grain select ing sheeting wings use lighter wood outer panels heavier wood center Use light medium stab rudder Use lots elbow grease sandpaper finishing Templates Fabricate wing stabilizer templates before build anything else usually use A6 plywood A2 plywood Left Illustrated method drilling through fuselage ply wing rib hole balsa wing blockto insert rear wing wire tube proper dihedral angle Right front fuselage earlier version side-mounted switch various sizes brass tubing notches filed ends form cutting edges used drilling holespreferable twist drills 32 Model Aviation CHUCK WOOD l4ank ClarkA WOOD CHIP LETSGETSERIOUSCHUCk BILL THOTYOUD ANT WEALL-SUTWHATY TELL DON TOTy TV- THATLL YOUE NOT LEAVNGTHESeHEVeRA5KTRIFIC YOUR SIMMICK PUT I-MTO5LEEP DONTTY I/4SO BALSA FIN RUDDEI/4X /2 RUDDER TE HITOIC HALLS L*JTIL GIMMICkYOLhNOW WEIALL KNXK -SRULLTOOUTGUESS MLITTLE PILOT S TOPANDLEDGE YOU TELL TE 6AD LAMA SHOW BIZ- IEE N VA Sfl UP HERE HOW COME YOU -FULLA E IS cHIPr1/16 X /4 DIAGONALS LITTLe t pjI5H IT NI6HT WITH0 HES NOTA TA COMPUTE HE NOW/S BUT 1/IGRIBS I/8RIBS WATALKING DULLES1/32 PLYWOOD BOX NFR LAENCLOSES 1/16 PLYWOOD HORN AND I/B BRASS RODS N/ I- X 5/BELEVTOR T E I/B BALSA SIDES7 TOPANDBOITOM I/B PLYWOOD SIDES 3/16 X 1/4 L E1/16 X 1/4 SPARS TOP AND BOTTOM WITH 1/8 50 SPACERS BETWEEN /4 BALSA BLOCKS BETWEEN WING SPARS 1/16 X 1/4 CAPS ALL RIBS TCA/ BOTTOM 1/16 WEBS BETWEEN ALL SPARS I/BX 1/4 SPRUCE SPARS TOPAND BOlTOM BOTH WING PANELS SO TTPLFTBLOCK SO T E fl NT BRACE TUBEI/2DIA WEIGHT TUBE BRASS TUBE 1/16 PLYWOOD /4 BALSA BLOCKS 4 BALSA BLOCK SPAR WEBS WEEN SPARS TO HERE HOLLOW BLOCKFRONTAND BJ1/32 PLYWOOD BRACE JaNS WNG PANELS AT SPARS I/B PLYWOOD SIDE3/B BALSA SHEETFILL UNDER/OVER TUBE WITHTOP AND BOTTOM BOll-I PANELS ND BOTTOM PANELSWING FAIRINGSSPRUCE AND MICRO-BALLOONS 1/16 WEBS BETWEEN ALL SPARS easier cut Cut out master wing airfoil template first dont drill holes yet Next cut WI wing rib template should /16-in smaller thafl master airfoil template Drill WI first locate clamp WI master airfoil template drill master now have accurate master lay fuselage sides drilling wing wire tube holes proper location also serves contour top fuselage airfoil shape However dont build wing fuselage yet Construct stab drill rib template next stab template used drill stab ribs also stab horn Vertical fin rudder Cut out two A2 ply horn box sides shaded area shown drawing Drill slot stab bearing rear wire clearance Lay side ply box down build Y16-in spacer frame around outside edge add second side should add up / rudder thickness okay remove top side adding horn bearing horn glue top ply section place Quickly stick piece 3A2-in wire stab-horn bearing Using square make sure sides aligned wire 900 sides horn box dont want crooked stab relationship rudder Also make sure horn remains free movable dry sand front back square lay drawing construct ver tical fin movable rudder around horn box Leave small dorsal fin off time Since rudder parts ribs -in wide trailing edge stock around Yb-in add trailing edge shim ming center ribs After glue has dried can trim sand ribs top bottom fair trailing edge can now construct fuselage Fuselage recommend forward fu selage sides plus bulkheads Wl wing ribs four stab ribs cut Lite-Ply plywood available Sig light weight easy cuteven jigsaw Whether use Lite-Ply regular ply cut fuselage sides shown Use ply forward splice balsa splice rear Use master airfoil template locate wing wire tube holes drill holes required Sand fuselage sides together brass wing tubes place mas ter airfoil templates will also help sand airfoil shape top fuse lage sides Cut fuselage bottom also ply forward one-third balsa rear two-thirds Next cut out bulkheads nose block nose block constructed three pieces -in basswood center section cut out can add lead ballast Taper outside nose block shown plans Lay fuselage bottom drawing Glue nose block bulkheads set rudder horn box assembly place Notice fin leading edge just barely rests Bulkhead F7 part dry add stab pushrod outer housing through bulkheads ending F7 Add inner pushrod metal horn clevis Make sure pushrod horn operate freely Add fuselage sides Install piece -in brass tubing through wing wire tube holes help align sides usually make template piece 3-in-sq balsa sheet cutting side about 910 Use template check angle between tubing fuselage sides fuselage straight F2 F7 angle same both sides clamp sides around F3 area Clamp fuselage sides lower ply box area rudder small C-clamp clothespins Finally clamp sides nose block Add other clamps and/or pins required use slow-drying epoxy Hobby Poxy #2 sides allows enough time align everything before glue sets up can now add rudder pushrod etc Note both outer pushrod housings inner rods place can snapped up out F2 later insertion radio receiver may want run antenna tube through fuselage side usually run antenna tube 3A6-in hole HRI/4 BALSA AIBOTTOII 1r SHOWN FI 0 RIGHT WING Pt II --F 111111111 OPT AWNCRIMPF____ II WHEELENDS COLLAR IL. I I/4LB00 SHEETTUBE[7}o Li ROOT RIBPOLY BREAK TEMPLATETEMPLATE 1 FII V4 TD LITE LY / POLYNEORA& BF~ I/lB 1/4 VBOCL BALSA SPOR BET WNRS N 5PA4I5/55 6 E WISENOTEAREAINSERTE BLAIT BE S/3D D-B/W TO PORN D-I/D FILL AREA WITh SPRUCE B MICRO BALLOONS 5/B BALSA TRAIUNGI EDGEI 3/lA 1/4E-E LEADING EDGES JEAIRS.Li LaLSJLBe F 1/4 50 BALSA P.- TAIL TYP CROSS SECT EPOSY BEAD FRlIh1I -3 PIECES OF S/jIq - SSWOOD CnE.- SECTION CUT OUT WW4 CANOPY NORMALLY NOSESOWN WITh EYE AOl FOREIGHT B RUBBER BARED WEIGHT BALSA ABEA- S/A IAIEFLATBATTERYjYSABEAF PACESI TOW H A-A I-tiNCAN0PY B WING SPACER BLOCKS MAY BE GLEES TOGETIER AFER FORABBO fuselage side after covering slit MonoKote reach small hook pull out antenna Cut out two wing fairing blocks 34 Model Aviation TUBE Left Wing spacer block sits bulkhead wing wire tube After covering rear block hinged 3M tape covering material Front ot block held place canopy Right Wing spacer block canopy glued together held down rubberband eye hooks FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 1—I/IE BALGA TRAILING EDGE II~-IVt _____________________ _________________________ _________________________Ii 1II -B IIAl r 11 II I II i1 LII 11I-~IIII II1-iiIi I-u - II BALOA 0B OO BRASS TUBE WING EYE HOOKS / RIBS 3-I/2 IZ 2 EACH 3-1HLONS 2 EACH H- S/4 LONS ROOT WEBS [v32][b-2-10-1-10]]V F --F--II itII RIGHT WING PLAN OUTBOARD PANEL IIII IOR NOTE PRE-ULUE ALL WING WEBS BEFORE FINAL IIi GLUING III -II -I- F OTE RASP-IN SLOTS FOR P/H 0 GAIN ACCESS TO RECEIVERALL WINB SHEETING IS AREAVW BALSA V F-3 P-4 F-5 F-H __ Ti 7K II H LEFT /ING PIAN INBOARD PANEL W-IN-SH-2N-3N-SH-SW-SW-3W-3 SWB BALSA WEB BAGSAERTICAL GRAIN EIB PLY/Bo /4 SPRUCE SPARS GEIGHT TUBEI/BBALSA WEBI VERT GRAIN/8 BALSA VB/8 fSHEETVERY GRAIN 9FLSAWY STOPAGO RIB H-H AFTER PANELS ARE JOINEE W-4 V4BALSA WEB IN POLY AREA NOTE POLYHEIWAL BRACES lAST SHOWN -f I/4SO EALSA LEADING EDGE BEVELEGAfEAESSE OF TOP-YE AEDGE OF BOTTOM-YE— B--NOT SHOWN ON L/H PANELS OUTBOARD PANEL oR-HA-A-HA-SN-IDW-I LEFT WING PLAN W-5 VB BALSA WEB HERE TO YIP 032 10 S1600 3/IN 5/Bo1o6 /16 PLT BRASS OR ALUM TUBE HORNIS 0 5/5200 GAO TUBE 2-5/4MASTER AIRFOIL-3/52 Ox Soo %5GU5LS TUBE B-"/000 TEMPLATEIS TIVEHORS BEARING ___S-VS WING POLYHEDRAL DETA L WIRE BOGS REOLIHEE WRO7/52o 7TYPICAL CROSS SECTIONI/IA F-7U I5/52 4-VS STAB 3/32 S-SWY2ATZI CANOPY HINGEVRPLY5/52 SNAP SYSTEM B-2S4 B-S 1/16 BALSA 1261 Il/ilW284 I/RBALSA RI -111 -Il FINlIIIiWEIGHT GRAIN IINLAY BET SIDESIAABB1/4 SHEETCOVEREG902 ESPY2902 LEAVE FUSELAGE COMAER SHARP AT THIS . WING LOAONU POINT PROGRESBOELY INCREASE RADIUS ruLELAGE SIE VIEWENE ELEVATOR SAYER7-z oz AFT APPROX H IS 3/52 BP20 TUBE IS BUKHEAO AIRING--C2LFTSTAB HORN BOG-I/16 OUThINE 3Fi0—A5/16 BALSA B/ V32 AFT SECTIIBO ----PLY TO FORM I/B I---I/B BALSA TOP--S- 2F3F-HSIDED B BOTTOM -T[j V /H I/O HICK BGS F-SED-TOP UI-IFETISIS S SPUPO / I/B 05 BRASS TUBE/52 PLY IF1 DOUBLER ALL CORNERS 5/52 R EUCEPT AU NOTED C USE SMALL RUDDER RUSSER B FIN ScOT NOTROOOER 0/0 /LROHOL SHOWN ON TOP VIEWEXITOLEYT TAIL GRID MASTER AIBEDIL TMPLATE CUT LEARANCE FORWING FAIRIRUS FROM S/B WOOD SHEET RING HOOKS TOP VIEW TES OUTLINE OF FUSELAGE SIGES ANTENNA EVIT SCOOTER METER NE D BY LE ON K INCAID IBBUN0 f TRACING BY JOE DENARCO %I-in basswood using master airfoil template will need tapered ap proximately /4n per top view plans wing tubes inserted through fuselage add fairing blocks check taper Trim inside surface blocks until outsides parallel blocks fit flush against fuselage parallel outside wing butts can glue place Add rear top side fuselage cross-grain sheeting tween sides wing fairing blocks October 1983 35 RD PANEL Left Wing tip ribs cut proper length stacked piece spar stock ready shaping tops per templates outer sides Right wing tip center panels joined together dihedral braces can easily installed photos author Left The wing panels have built nd sanded smooth Theyre now ready covering Note tips finished thin edge can seen wing half left Right stabilator horn place 1/32 ply horn box cover ready added Fabricate wing spacer block fit tween sides rest top F2 wing tube Sand top block airfoil shape fuselage sides fairing blocks After spacer block sanded shape cut carve sand canopy block fit over radio area neatly over spacer block Glue scrap X p approxi mately 1-in long across bottom canopy block several places properly locate canopy fuselage canopy block wing spacer block may glued togetheror left separate canopy can held place eye hooks rubberbands alternate method shown drawing may used Add small /4 sheet dorsal fin fuselage ready sand Wings layout plan may seem little strange you would rather cut up drawing place tip panels ends center panels can build complete wing halves together thats fine arranged panels way did two reasons First both tip panels can built one-piece 36-in bottom spar 36-in pieces complete rest tip panels minimum scrap same true center panels except 48-in wood used Second leave main x s piece sandwich /4-in brass wing wire tubes between spars helps keep tubes nice straight will notice bottom Wl same shape WI Consequently ribs can cut WI template guide Make two ribs Lite-Ply six /s balsa 26 Vis balsa Four teen 26 / s-in ribs tapered tip panels stack taper 14 tip ribs Select seven left panel seven right panel Using thin-line felt-tip pen mark two ribs W5 two W6 etc through WI Lay bottom spar drawing Insert rib its correct posi tion felt-tip pen hurk ribs leading edge LE trailing edge TE excess should cut off Take two WI ribs contour top airfoil shown drawing Using short piece x stock stack ribs W4 through WI contour tops Ribs W5 through W 10 same op posite panel will have re-cut top spar notch tapered ribs always assemble center panels first Yes slight bit undercamber wing dont worry about can build wing right over draving airfoil rests main spar tip trailing edge Cut leading trailing edge sheeting proper length panel Due leading edge contouring bending over ribs make sheeting about A-in wider shown drawing can cut off excess after assembly Put together both center panels same time following order Lay bottom lead ing edge sheeting drawing lining up spar Lay 42-in one-piece uncut spar top sheeting proper place can CyA-glue spar sheetingor use white glue Lay dont pin down bottom TB place remember bevel first Add W3 ribs glue spar sheeting TE Add WI ply rib brass tubing same time tilt rib 3V0 use template end brass tubing should just touch bottom spar see cross section DD important brass tube no longer shorter indicated will change angle Add top piece spar both panels Before gluing check top straightedge Make sure brass tubing squarely tween top bottom spars just touching bottom spar Add drop CyA hold tubing place Add A-in-width vertical-grain balsa webbing between end tube Rib W3 Use either scrap wood and/or micro balloons glue fill cavities side top bottom tubes Add As ply brace side tube area will sandwich tubes between spars Cut trim W2 ribs fit Make sure aft part W2 ribs level top spar necessary add Vis-in shims under W2s temporarily substitute As-in fairing sheet will added later Add vertical-grain webs between spars time may want add webs before add top spar prefer fit time whatever feel best razor plane shape LB shown add front face ribs Now will raise bottom sheeting ribsby shimming can use either long ruler TB stock good straight stock around A-in thick usually two three steps gluing CyA go 36 Model Aviation Left The stabilator rudder ready cover one-piece hinge pin used may visible magazine reproduction picture allows easy rudder removal case repairs needed Right vertical fin constructed around completed horn box fuselage sides will sandwich both sides lower fin horn box assembly provide strong stabilator support Run ruler between drawing LE sheeting until sheeting shimmed tightly against ribs Continue closing gap shims gluing until bottom sheeting completely glued ribs LE can now cut main spars center panels can moved sepa rately Note Leave off top sheeting time Due undercambered airfoil tip ribs will touching bottom TE Remove panels building board glue TE ribs dry add top TE sheeting Assemble tip panels same way center panels After panels completed except top sheeting use sanding block sand panel ends poly break until fit together perfectly Lay center panel building board shim tip panel proper angle butt-glue panels together Wipe away excess glue dry add dihedral braces side main spars back sid LE Trim taper I-in length spruce /x sq x /4 fit hollow section TE poly break strengthen joint Cut trim add W4 Use forward halves two extra W2 ribs between spars leading edge inserted against innermost W3 weight tube support Youll need two pieces /-in GD aluminum fiberglass tubing brass too heavy least 5-in long install through WI W2 ribs glue place Cardboard tubes model rocket motors would also work well Find best-fitting brass tubing avail able hobby shops will go inside aluminum tubes Cut about four pieces brass tubing will fill remov able weights Fill two about halfway lead completely fill other two A6-in brass tube 5-in long filled lead will weigh 46 oz Two tubes course will weigh 92 oz wing tube extended 7-in total weight added will about 138 oz Lay main inner wine nanel building board add top LE sheeting completely dry raise shim center panels until tip panels laying building board add outer top sheeting Befrre have pins added will need check outer panel washout Twist tip panel until tip TE between /x 3/6-in higher dihedral break set add additional pins sheeting needed Add center panel fairing sheet tween spar TE bottom side Add lock balsa between WI W2 over A-in GD rear wing wire tube hole wing half Now have add -in GD brass tube through -in hole /6 sq balsa supportat proper angle Heres Remove rear -in brass wing tube fuselage Install wing half main wing wire Using long extension drill /x-in tube very coarse teeth filed end run through fuselage fairing blocks -in hole nlv rib WI Y 2nd drill tho 3/ n block until drill goes through Rib W2 Remove wing half drill op posite half same way Add little glue brass tubing -in GD l/2-in length install hole now ready add top center fairing sheet ing cap strips wing tip block wing now complete except sanding covering OPTIONAL WEBBING Its important use spar webbing Installing webs between spars best though could glue edges shown Stabilator stab halves built almost flat sanded final shape Lay down bottom one-piece spar over drawing Cut ribs four -Ply eight /6 sheet balsa -in high Notch top bottom spars Drill Continued page 129 October 1983 37 entire tail section ready covering fitted together early preview sections easy build have good strength though lightweight beauty Scooter Two-Meter Sailplane form finish match its truly outstanding flight qualities Wing leading edge pin striping certainly decorative also thought functional least some amount turbulating effect briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 129
I SEVERAL MONTHS AGO read some claim Two-Meter RC Sail plane class dying out very popular dont know writer got source because everywhere go getting bigger ever 1982 Nats no exception Two-Meter event entries other Sailplane class several new kits size market neat designs coming out month saw some beautiful TwoMeter multi-channeled Sailplanes aile rons 1982 Nats looked number well-known outstanding pilots fly against figured Scooter best could least Scooter did its part placing first event Sailplane designed com pete hot F3B World Championship class wings built V dihedral ailerons would very com petitive does move out fastjust what designed John Gunsaullus St Petersburg FL has won several Two-Meter contests Scooter including first place 1981 Deep South Championships also fastest time recent F3B qualifying trials semi-finals flying against some excellent FAI-type aircraft really want good testimonial talk Tom Con nelly St Petersburg FL recent wins 30 Model Aviation bli surfaces removed easy packing Scooter will fit smallest com pact autos rudder removed model will fit within box just 42 long Left Every effort has made assure clean lines low drag wing-fuselage joint still simplicity Note fuselage top between wing panels airfoil-shaped Right An optional canopy arrangement has slotted wing spacer block ~snaps~ over brass wing wire tube Canopy removed can see bulkhead-mounted switch outer pushrod housing also snaps bulkhead slots Left Another view assembled optional canopy spacer block glued together simple spring-loaded pin holds down front canopy Right Wing tips simple clean Tip block shaped seine airfoil tapered rather sharp outer edge Left Extra weight windy days added inserting lead-filled partly filled brass tubes receiving holes wing Tube shown filled 410 lead slugs gun shop Right Look angle clean lines between wings fuselage obvious flying Scooter Two-Meter Unlimited classes have quickly taken him out Sportsman class Ex pert Ed Wright Jr Tampa FL has also won several first places including 1981 exceptionally easy fly Scooter Tangerine Championships worth work takes build First place get out model what put 1982 Nats against some really hot ultimate competition still competition best proof can give October 1983 31 Left Special wire hook used pulling wing-retaining rubberbands through fuselage its used hook rubber onto eye hook other wing panel Right Tail section straightforward Rudder area larger normal improve response low speeds Left Stabilator halves held place 4-40 setscrews aluminum wheel collars Note Allen wrench projecting stab Right tow hook homemade author extruded aluminum T-shaped stock commercial varieties could used General few things should shouldnt Dont use twist drill drill holes holes will drift off-center usually come out fuzzy Use drill tem plate guide piece brass tubing cutting edge filed form small teeth Use good aliphatic resin glue balsa parts fast cyanoacrylate CyA special areas good slow-drying epoxy high-strength plywood areas Dont build directly plan Cover plastic like Saran Wrap Afteryou have covered model like MonoKote save clear plastic backing lay over drawing building next model Select wood carefully Use wing spars have straight grain select ing sheeting wings use lighter wood outer panels heavier wood center Use light medium stab rudder Use lots elbow grease sandpaper finishing Templates Fabricate wing stabilizer templates before build anything else usually use A6 plywood A2 plywood Left Illustrated method drilling through fuselage ply wing rib hole balsa wing blockto insert rear wing wire tube proper dihedral angle Right front fuselage earlier version side-mounted switch various sizes brass tubing notches filed ends form cutting edges used drilling holespreferable twist drills 32 Model Aviation CHUCK WOOD l4ank ClarkA WOOD CHIP LETSGETSERIOUSCHUCk BILL THOTYOUD ANT WEALL-SUTWHATY TELL DON TOTy TV- THATLL YOUE NOT LEAVNGTHESeHEVeRA5KTRIFIC YOUR SIMMICK PUT I-MTO5LEEP DONTTY I/4SO BALSA FIN RUDDEI/4X /2 RUDDER TE HITOIC HALLS L*JTIL GIMMICkYOLhNOW WEIALL KNXK -SRULLTOOUTGUESS MLITTLE PILOT S TOPANDLEDGE YOU TELL TE 6AD LAMA SHOW BIZ- IEE N VA Sfl UP HERE HOW COME YOU -FULLA E IS cHIPr1/16 X /4 DIAGONALS LITTLe t pjI5H IT NI6HT WITH0 HES NOTA TA COMPUTE HE NOW/S BUT 1/IGRIBS I/8RIBS WATALKING DULLES1/32 PLYWOOD BOX NFR LAENCLOSES 1/16 PLYWOOD HORN AND I/B BRASS RODS N/ I- X 5/BELEVTOR T E I/B BALSA SIDES7 TOPANDBOITOM I/B PLYWOOD SIDES 3/16 X 1/4 L E1/16 X 1/4 SPARS TOP AND BOTTOM WITH 1/8 50 SPACERS BETWEEN /4 BALSA BLOCKS BETWEEN WING SPARS 1/16 X 1/4 CAPS ALL RIBS TCA/ BOTTOM 1/16 WEBS BETWEEN ALL SPARS I/BX 1/4 SPRUCE SPARS TOPAND BOlTOM BOTH WING PANELS SO TTPLFTBLOCK SO T E fl NT BRACE TUBEI/2DIA WEIGHT TUBE BRASS TUBE 1/16 PLYWOOD /4 BALSA BLOCKS 4 BALSA BLOCK SPAR WEBS WEEN SPARS TO HERE HOLLOW BLOCKFRONTAND BJ1/32 PLYWOOD BRACE JaNS WNG PANELS AT SPARS I/B PLYWOOD SIDE3/B BALSA SHEETFILL UNDER/OVER TUBE WITHTOP AND BOTTOM BOll-I PANELS ND BOTTOM PANELSWING FAIRINGSSPRUCE AND MICRO-BALLOONS 1/16 WEBS BETWEEN ALL SPARS easier cut Cut out master wing airfoil template first dont drill holes yet Next cut WI wing rib template should /16-in smaller thafl master airfoil template Drill WI first locate clamp WI master airfoil template drill master now have accurate master lay fuselage sides drilling wing wire tube holes proper location also serves contour top fuselage airfoil shape However dont build wing fuselage yet Construct stab drill rib template next stab template used drill stab ribs also stab horn Vertical fin rudder Cut out two A2 ply horn box sides shaded area shown drawing Drill slot stab bearing rear wire clearance Lay side ply box down build Y16-in spacer frame around outside edge add second side should add up / rudder thickness okay remove top side adding horn bearing horn glue top ply section place Quickly stick piece 3A2-in wire stab-horn bearing Using square make sure sides aligned wire 900 sides horn box dont want crooked stab relationship rudder Also make sure horn remains free movable dry sand front back square lay drawing construct ver tical fin movable rudder around horn box Leave small dorsal fin off time Since rudder parts ribs -in wide trailing edge stock around Yb-in add trailing edge shim ming center ribs After glue has dried can trim sand ribs top bottom fair trailing edge can now construct fuselage Fuselage recommend forward fu selage sides plus bulkheads Wl wing ribs four stab ribs cut Lite-Ply plywood available Sig light weight easy cuteven jigsaw Whether use Lite-Ply regular ply cut fuselage sides shown Use ply forward splice balsa splice rear Use master airfoil template locate wing wire tube holes drill holes required Sand fuselage sides together brass wing tubes place mas ter airfoil templates will also help sand airfoil shape top fuse lage sides Cut fuselage bottom also ply forward one-third balsa rear two-thirds Next cut out bulkheads nose block nose block constructed three pieces -in basswood center section cut out can add lead ballast Taper outside nose block shown plans Lay fuselage bottom drawing Glue nose block bulkheads set rudder horn box assembly place Notice fin leading edge just barely rests Bulkhead F7 part dry add stab pushrod outer housing through bulkheads ending F7 Add inner pushrod metal horn clevis Make sure pushrod horn operate freely Add fuselage sides Install piece -in brass tubing through wing wire tube holes help align sides usually make template piece 3-in-sq balsa sheet cutting side about 910 Use template check angle between tubing fuselage sides fuselage straight F2 F7 angle same both sides clamp sides around F3 area Clamp fuselage sides lower ply box area rudder small C-clamp clothespins Finally clamp sides nose block Add other clamps and/or pins required use slow-drying epoxy Hobby Poxy #2 sides allows enough time align everything before glue sets up can now add rudder pushrod etc Note both outer pushrod housings inner rods place can snapped up out F2 later insertion radio receiver may want run antenna tube through fuselage side usually run antenna tube 3A6-in hole HRI/4 BALSA AIBOTTOII 1r SHOWN FI 0 RIGHT WING Pt II --F 111111111 OPT AWNCRIMPF____ II WHEELENDS COLLAR IL. I I/4LB00 SHEETTUBE[7}o Li ROOT RIBPOLY BREAK TEMPLATETEMPLATE 1 FII V4 TD LITE LY / POLYNEORA& BF~ I/lB 1/4 VBOCL BALSA SPOR BET WNRS N 5PA4I5/55 6 E WISENOTEAREAINSERTE BLAIT BE S/3D D-B/W TO PORN D-I/D FILL AREA WITh SPRUCE B MICRO BALLOONS 5/B BALSA TRAIUNGI EDGEI 3/lA 1/4E-E LEADING EDGES JEAIRS.Li LaLSJLBe F 1/4 50 BALSA P.- TAIL TYP CROSS SECT EPOSY BEAD FRlIh1I -3 PIECES OF S/jIq - SSWOOD CnE.- SECTION CUT OUT WW4 CANOPY NORMALLY NOSESOWN WITh EYE AOl FOREIGHT B RUBBER BARED WEIGHT BALSA ABEA- S/A IAIEFLATBATTERYjYSABEAF PACESI TOW H A-A I-tiNCAN0PY B WING SPACER BLOCKS MAY BE GLEES TOGETIER AFER FORABBO fuselage side after covering slit MonoKote reach small hook pull out antenna Cut out two wing fairing blocks 34 Model Aviation TUBE Left Wing spacer block sits bulkhead wing wire tube After covering rear block hinged 3M tape covering material Front ot block held place canopy Right Wing spacer block canopy glued together held down rubberband eye hooks FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 1—I/IE BALGA TRAILING EDGE II~-IVt _____________________ _________________________ _________________________Ii 1II -B IIAl r 11 II I II i1 LII 11I-~IIII II1-iiIi I-u - II BALOA 0B OO BRASS TUBE WING EYE HOOKS / RIBS 3-I/2 IZ 2 EACH 3-1HLONS 2 EACH H- S/4 LONS ROOT WEBS [v32][b-2-10-1-10]]V F --F--II itII RIGHT WING PLAN OUTBOARD PANEL IIII IOR NOTE PRE-ULUE ALL WING WEBS BEFORE FINAL IIi GLUING III -II -I- F OTE RASP-IN SLOTS FOR P/H 0 GAIN ACCESS TO RECEIVERALL WINB SHEETING IS AREAVW BALSA V F-3 P-4 F-5 F-H __ Ti 7K II H LEFT /ING PIAN INBOARD PANEL W-IN-SH-2N-3N-SH-SW-SW-3W-3 SWB BALSA WEB BAGSAERTICAL GRAIN EIB PLY/Bo /4 SPRUCE SPARS GEIGHT TUBEI/BBALSA WEBI VERT GRAIN/8 BALSA VB/8 fSHEETVERY GRAIN 9FLSAWY STOPAGO RIB H-H AFTER PANELS ARE JOINEE W-4 V4BALSA WEB IN POLY AREA NOTE POLYHEIWAL BRACES lAST SHOWN -f I/4SO EALSA LEADING EDGE BEVELEGAfEAESSE OF TOP-YE AEDGE OF BOTTOM-YE— B--NOT SHOWN ON L/H PANELS OUTBOARD PANEL oR-HA-A-HA-SN-IDW-I LEFT WING PLAN W-5 VB BALSA WEB HERE TO YIP 032 10 S1600 3/IN 5/Bo1o6 /16 PLT BRASS OR ALUM TUBE HORNIS 0 5/5200 GAO TUBE 2-5/4MASTER AIRFOIL-3/52 Ox Soo %5GU5LS TUBE B-"/000 TEMPLATEIS TIVEHORS BEARING ___S-VS WING POLYHEDRAL DETA L WIRE BOGS REOLIHEE WRO7/52o 7TYPICAL CROSS SECTIONI/IA F-7U I5/52 4-VS STAB 3/32 S-SWY2ATZI CANOPY HINGEVRPLY5/52 SNAP SYSTEM B-2S4 B-S 1/16 BALSA 1261 Il/ilW284 I/RBALSA RI -111 -Il FINlIIIiWEIGHT GRAIN IINLAY BET SIDESIAABB1/4 SHEETCOVEREG902 ESPY2902 LEAVE FUSELAGE COMAER SHARP AT THIS . WING LOAONU POINT PROGRESBOELY INCREASE RADIUS ruLELAGE SIE VIEWENE ELEVATOR SAYER7-z oz AFT APPROX H IS 3/52 BP20 TUBE IS BUKHEAO AIRING--C2LFTSTAB HORN BOG-I/16 OUThINE 3Fi0—A5/16 BALSA B/ V32 AFT SECTIIBO ----PLY TO FORM I/B I---I/B BALSA TOP--S- 2F3F-HSIDED B BOTTOM -T[j V /H I/O HICK BGS F-SED-TOP UI-IFETISIS S SPUPO / I/B 05 BRASS TUBE/52 PLY IF1 DOUBLER ALL CORNERS 5/52 R EUCEPT AU NOTED C USE SMALL RUDDER RUSSER B FIN ScOT NOTROOOER 0/0 /LROHOL SHOWN ON TOP VIEWEXITOLEYT TAIL GRID MASTER AIBEDIL TMPLATE CUT LEARANCE FORWING FAIRIRUS FROM S/B WOOD SHEET RING HOOKS TOP VIEW TES OUTLINE OF FUSELAGE SIGES ANTENNA EVIT SCOOTER METER NE D BY LE ON K INCAID IBBUN0 f TRACING BY JOE DENARCO %I-in basswood using master airfoil template will need tapered ap proximately /4n per top view plans wing tubes inserted through fuselage add fairing blocks check taper Trim inside surface blocks until outsides parallel blocks fit flush against fuselage parallel outside wing butts can glue place Add rear top side fuselage cross-grain sheeting tween sides wing fairing blocks October 1983 35 RD PANEL Left Wing tip ribs cut proper length stacked piece spar stock ready shaping tops per templates outer sides Right wing tip center panels joined together dihedral braces can easily installed photos author Left The wing panels have built nd sanded smooth Theyre now ready covering Note tips finished thin edge can seen wing half left Right stabilator horn place 1/32 ply horn box cover ready added Fabricate wing spacer block fit tween sides rest top F2 wing tube Sand top block airfoil shape fuselage sides fairing blocks After spacer block sanded shape cut carve sand canopy block fit over radio area neatly over spacer block Glue scrap X p approxi mately 1-in long across bottom canopy block several places properly locate canopy fuselage canopy block wing spacer block may glued togetheror left separate canopy can held place eye hooks rubberbands alternate method shown drawing may used Add small /4 sheet dorsal fin fuselage ready sand Wings layout plan may seem little strange you would rather cut up drawing place tip panels ends center panels can build complete wing halves together thats fine arranged panels way did two reasons First both tip panels can built one-piece 36-in bottom spar 36-in pieces complete rest tip panels minimum scrap same true center panels except 48-in wood used Second leave main x s piece sandwich /4-in brass wing wire tubes between spars helps keep tubes nice straight will notice bottom Wl same shape WI Consequently ribs can cut WI template guide Make two ribs Lite-Ply six /s balsa 26 Vis balsa Four teen 26 / s-in ribs tapered tip panels stack taper 14 tip ribs Select seven left panel seven right panel Using thin-line felt-tip pen mark two ribs W5 two W6 etc through WI Lay bottom spar drawing Insert rib its correct posi tion felt-tip pen hurk ribs leading edge LE trailing edge TE excess should cut off Take two WI ribs contour top airfoil shown drawing Using short piece x stock stack ribs W4 through WI contour tops Ribs W5 through W 10 same op posite panel will have re-cut top spar notch tapered ribs always assemble center panels first Yes slight bit undercamber wing dont worry about can build wing right over draving airfoil rests main spar tip trailing edge Cut leading trailing edge sheeting proper length panel Due leading edge contouring bending over ribs make sheeting about A-in wider shown drawing can cut off excess after assembly Put together both center panels same time following order Lay bottom lead ing edge sheeting drawing lining up spar Lay 42-in one-piece uncut spar top sheeting proper place can CyA-glue spar sheetingor use white glue Lay dont pin down bottom TB place remember bevel first Add W3 ribs glue spar sheeting TE Add WI ply rib brass tubing same time tilt rib 3V0 use template end brass tubing should just touch bottom spar see cross section DD important brass tube no longer shorter indicated will change angle Add top piece spar both panels Before gluing check top straightedge Make sure brass tubing squarely tween top bottom spars just touching bottom spar Add drop CyA hold tubing place Add A-in-width vertical-grain balsa webbing between end tube Rib W3 Use either scrap wood and/or micro balloons glue fill cavities side top bottom tubes Add As ply brace side tube area will sandwich tubes between spars Cut trim W2 ribs fit Make sure aft part W2 ribs level top spar necessary add Vis-in shims under W2s temporarily substitute As-in fairing sheet will added later Add vertical-grain webs between spars time may want add webs before add top spar prefer fit time whatever feel best razor plane shape LB shown add front face ribs Now will raise bottom sheeting ribsby shimming can use either long ruler TB stock good straight stock around A-in thick usually two three steps gluing CyA go 36 Model Aviation Left The stabilator rudder ready cover one-piece hinge pin used may visible magazine reproduction picture allows easy rudder removal case repairs needed Right vertical fin constructed around completed horn box fuselage sides will sandwich both sides lower fin horn box assembly provide strong stabilator support Run ruler between drawing LE sheeting until sheeting shimmed tightly against ribs Continue closing gap shims gluing until bottom sheeting completely glued ribs LE can now cut main spars center panels can moved sepa rately Note Leave off top sheeting time Due undercambered airfoil tip ribs will touching bottom TE Remove panels building board glue TE ribs dry add top TE sheeting Assemble tip panels same way center panels After panels completed except top sheeting use sanding block sand panel ends poly break until fit together perfectly Lay center panel building board shim tip panel proper angle butt-glue panels together Wipe away excess glue dry add dihedral braces side main spars back sid LE Trim taper I-in length spruce /x sq x /4 fit hollow section TE poly break strengthen joint Cut trim add W4 Use forward halves two extra W2 ribs between spars leading edge inserted against innermost W3 weight tube support Youll need two pieces /-in GD aluminum fiberglass tubing brass too heavy least 5-in long install through WI W2 ribs glue place Cardboard tubes model rocket motors would also work well Find best-fitting brass tubing avail able hobby shops will go inside aluminum tubes Cut about four pieces brass tubing will fill remov able weights Fill two about halfway lead completely fill other two A6-in brass tube 5-in long filled lead will weigh 46 oz Two tubes course will weigh 92 oz wing tube extended 7-in total weight added will about 138 oz Lay main inner wine nanel building board add top LE sheeting completely dry raise shim center panels until tip panels laying building board add outer top sheeting Befrre have pins added will need check outer panel washout Twist tip panel until tip TE between /x 3/6-in higher dihedral break set add additional pins sheeting needed Add center panel fairing sheet tween spar TE bottom side Add lock balsa between WI W2 over A-in GD rear wing wire tube hole wing half Now have add -in GD brass tube through -in hole /6 sq balsa supportat proper angle Heres Remove rear -in brass wing tube fuselage Install wing half main wing wire Using long extension drill /x-in tube very coarse teeth filed end run through fuselage fairing blocks -in hole nlv rib WI Y 2nd drill tho 3/ n block until drill goes through Rib W2 Remove wing half drill op posite half same way Add little glue brass tubing -in GD l/2-in length install hole now ready add top center fairing sheet ing cap strips wing tip block wing now complete except sanding covering OPTIONAL WEBBING Its important use spar webbing Installing webs between spars best though could glue edges shown Stabilator stab halves built almost flat sanded final shape Lay down bottom one-piece spar over drawing Cut ribs four -Ply eight /6 sheet balsa -in high Notch top bottom spars Drill Continued page 129 October 1983 37 entire tail section ready covering fitted together early preview sections easy build have good strength though lightweight beauty Scooter Two-Meter Sailplane form finish match its truly outstanding flight qualities Wing leading edge pin striping certainly decorative also thought functional least some amount turbulating effect briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 129
I SEVERAL MONTHS AGO read some claim Two-Meter RC Sail plane class dying out very popular dont know writer got source because everywhere go getting bigger ever 1982 Nats no exception Two-Meter event entries other Sailplane class several new kits size market neat designs coming out month saw some beautiful TwoMeter multi-channeled Sailplanes aile rons 1982 Nats looked number well-known outstanding pilots fly against figured Scooter best could least Scooter did its part placing first event Sailplane designed com pete hot F3B World Championship class wings built V dihedral ailerons would very com petitive does move out fastjust what designed John Gunsaullus St Petersburg FL has won several Two-Meter contests Scooter including first place 1981 Deep South Championships also fastest time recent F3B qualifying trials semi-finals flying against some excellent FAI-type aircraft really want good testimonial talk Tom Con nelly St Petersburg FL recent wins 30 Model Aviation bli surfaces removed easy packing Scooter will fit smallest com pact autos rudder removed model will fit within box just 42 long Left Every effort has made assure clean lines low drag wing-fuselage joint still simplicity Note fuselage top between wing panels airfoil-shaped Right An optional canopy arrangement has slotted wing spacer block ~snaps~ over brass wing wire tube Canopy removed can see bulkhead-mounted switch outer pushrod housing also snaps bulkhead slots Left Another view assembled optional canopy spacer block glued together simple spring-loaded pin holds down front canopy Right Wing tips simple clean Tip block shaped seine airfoil tapered rather sharp outer edge Left Extra weight windy days added inserting lead-filled partly filled brass tubes receiving holes wing Tube shown filled 410 lead slugs gun shop Right Look angle clean lines between wings fuselage obvious flying Scooter Two-Meter Unlimited classes have quickly taken him out Sportsman class Ex pert Ed Wright Jr Tampa FL has also won several first places including 1981 exceptionally easy fly Scooter Tangerine Championships worth work takes build First place get out model what put 1982 Nats against some really hot ultimate competition still competition best proof can give October 1983 31 Left Special wire hook used pulling wing-retaining rubberbands through fuselage its used hook rubber onto eye hook other wing panel Right Tail section straightforward Rudder area larger normal improve response low speeds Left Stabilator halves held place 4-40 setscrews aluminum wheel collars Note Allen wrench projecting stab Right tow hook homemade author extruded aluminum T-shaped stock commercial varieties could used General few things should shouldnt Dont use twist drill drill holes holes will drift off-center usually come out fuzzy Use drill tem plate guide piece brass tubing cutting edge filed form small teeth Use good aliphatic resin glue balsa parts fast cyanoacrylate CyA special areas good slow-drying epoxy high-strength plywood areas Dont build directly plan Cover plastic like Saran Wrap Afteryou have covered model like MonoKote save clear plastic backing lay over drawing building next model Select wood carefully Use wing spars have straight grain select ing sheeting wings use lighter wood outer panels heavier wood center Use light medium stab rudder Use lots elbow grease sandpaper finishing Templates Fabricate wing stabilizer templates before build anything else usually use A6 plywood A2 plywood Left Illustrated method drilling through fuselage ply wing rib hole balsa wing blockto insert rear wing wire tube proper dihedral angle Right front fuselage earlier version side-mounted switch various sizes brass tubing notches filed ends form cutting edges used drilling holespreferable twist drills 32 Model Aviation CHUCK WOOD l4ank ClarkA WOOD CHIP LETSGETSERIOUSCHUCk BILL THOTYOUD ANT WEALL-SUTWHATY TELL DON TOTy TV- THATLL YOUE NOT LEAVNGTHESeHEVeRA5KTRIFIC YOUR SIMMICK PUT I-MTO5LEEP DONTTY I/4SO BALSA FIN RUDDEI/4X /2 RUDDER TE HITOIC HALLS L*JTIL GIMMICkYOLhNOW WEIALL KNXK -SRULLTOOUTGUESS MLITTLE PILOT S TOPANDLEDGE YOU TELL TE 6AD LAMA SHOW BIZ- IEE N VA Sfl UP HERE HOW COME YOU -FULLA E IS cHIPr1/16 X /4 DIAGONALS LITTLe t pjI5H IT NI6HT WITH0 HES NOTA TA COMPUTE HE NOW/S BUT 1/IGRIBS I/8RIBS WATALKING DULLES1/32 PLYWOOD BOX NFR LAENCLOSES 1/16 PLYWOOD HORN AND I/B BRASS RODS N/ I- X 5/BELEVTOR T E I/B BALSA SIDES7 TOPANDBOITOM I/B PLYWOOD SIDES 3/16 X 1/4 L E1/16 X 1/4 SPARS TOP AND BOTTOM WITH 1/8 50 SPACERS BETWEEN /4 BALSA BLOCKS BETWEEN WING SPARS 1/16 X 1/4 CAPS ALL RIBS TCA/ BOTTOM 1/16 WEBS BETWEEN ALL SPARS I/BX 1/4 SPRUCE SPARS TOPAND BOlTOM BOTH WING PANELS SO TTPLFTBLOCK SO T E fl NT BRACE TUBEI/2DIA WEIGHT TUBE BRASS TUBE 1/16 PLYWOOD /4 BALSA BLOCKS 4 BALSA BLOCK SPAR WEBS WEEN SPARS TO HERE HOLLOW BLOCKFRONTAND BJ1/32 PLYWOOD BRACE JaNS WNG PANELS AT SPARS I/B PLYWOOD SIDE3/B BALSA SHEETFILL UNDER/OVER TUBE WITHTOP AND BOTTOM BOll-I PANELS ND BOTTOM PANELSWING FAIRINGSSPRUCE AND MICRO-BALLOONS 1/16 WEBS BETWEEN ALL SPARS easier cut Cut out master wing airfoil template first dont drill holes yet Next cut WI wing rib template should /16-in smaller thafl master airfoil template Drill WI first locate clamp WI master airfoil template drill master now have accurate master lay fuselage sides drilling wing wire tube holes proper location also serves contour top fuselage airfoil shape However dont build wing fuselage yet Construct stab drill rib template next stab template used drill stab ribs also stab horn Vertical fin rudder Cut out two A2 ply horn box sides shaded area shown drawing Drill slot stab bearing rear wire clearance Lay side ply box down build Y16-in spacer frame around outside edge add second side should add up / rudder thickness okay remove top side adding horn bearing horn glue top ply section place Quickly stick piece 3A2-in wire stab-horn bearing Using square make sure sides aligned wire 900 sides horn box dont want crooked stab relationship rudder Also make sure horn remains free movable dry sand front back square lay drawing construct ver tical fin movable rudder around horn box Leave small dorsal fin off time Since rudder parts ribs -in wide trailing edge stock around Yb-in add trailing edge shim ming center ribs After glue has dried can trim sand ribs top bottom fair trailing edge can now construct fuselage Fuselage recommend forward fu selage sides plus bulkheads Wl wing ribs four stab ribs cut Lite-Ply plywood available Sig light weight easy cuteven jigsaw Whether use Lite-Ply regular ply cut fuselage sides shown Use ply forward splice balsa splice rear Use master airfoil template locate wing wire tube holes drill holes required Sand fuselage sides together brass wing tubes place mas ter airfoil templates will also help sand airfoil shape top fuse lage sides Cut fuselage bottom also ply forward one-third balsa rear two-thirds Next cut out bulkheads nose block nose block constructed three pieces -in basswood center section cut out can add lead ballast Taper outside nose block shown plans Lay fuselage bottom drawing Glue nose block bulkheads set rudder horn box assembly place Notice fin leading edge just barely rests Bulkhead F7 part dry add stab pushrod outer housing through bulkheads ending F7 Add inner pushrod metal horn clevis Make sure pushrod horn operate freely Add fuselage sides Install piece -in brass tubing through wing wire tube holes help align sides usually make template piece 3-in-sq balsa sheet cutting side about 910 Use template check angle between tubing fuselage sides fuselage straight F2 F7 angle same both sides clamp sides around F3 area Clamp fuselage sides lower ply box area rudder small C-clamp clothespins Finally clamp sides nose block Add other clamps and/or pins required use slow-drying epoxy Hobby Poxy #2 sides allows enough time align everything before glue sets up can now add rudder pushrod etc Note both outer pushrod housings inner rods place can snapped up out F2 later insertion radio receiver may want run antenna tube through fuselage side usually run antenna tube 3A6-in hole HRI/4 BALSA AIBOTTOII 1r SHOWN FI 0 RIGHT WING Pt II --F 111111111 OPT AWNCRIMPF____ II WHEELENDS COLLAR IL. I I/4LB00 SHEETTUBE[7}o Li ROOT RIBPOLY BREAK TEMPLATETEMPLATE 1 FII V4 TD LITE LY / POLYNEORA& BF~ I/lB 1/4 VBOCL BALSA SPOR BET WNRS N 5PA4I5/55 6 E WISENOTEAREAINSERTE BLAIT BE S/3D D-B/W TO PORN D-I/D FILL AREA WITh SPRUCE B MICRO BALLOONS 5/B BALSA TRAIUNGI EDGEI 3/lA 1/4E-E LEADING EDGES JEAIRS.Li LaLSJLBe F 1/4 50 BALSA P.- TAIL TYP CROSS SECT EPOSY BEAD FRlIh1I -3 PIECES OF S/jIq - SSWOOD CnE.- SECTION CUT OUT WW4 CANOPY NORMALLY NOSESOWN WITh EYE AOl FOREIGHT B RUBBER BARED WEIGHT BALSA ABEA- S/A IAIEFLATBATTERYjYSABEAF PACESI TOW H A-A I-tiNCAN0PY B WING SPACER BLOCKS MAY BE GLEES TOGETIER AFER FORABBO fuselage side after covering slit MonoKote reach small hook pull out antenna Cut out two wing fairing blocks 34 Model Aviation TUBE Left Wing spacer block sits bulkhead wing wire tube After covering rear block hinged 3M tape covering material Front ot block held place canopy Right Wing spacer block canopy glued together held down rubberband eye hooks FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 1—I/IE BALGA TRAILING EDGE II~-IVt _____________________ _________________________ _________________________Ii 1II -B IIAl r 11 II I II i1 LII 11I-~IIII II1-iiIi I-u - II BALOA 0B OO BRASS TUBE WING EYE HOOKS / RIBS 3-I/2 IZ 2 EACH 3-1HLONS 2 EACH H- S/4 LONS ROOT WEBS [v32][b-2-10-1-10]]V F --F--II itII RIGHT WING PLAN OUTBOARD PANEL IIII IOR NOTE PRE-ULUE ALL WING WEBS BEFORE FINAL IIi GLUING III -II -I- F OTE RASP-IN SLOTS FOR P/H 0 GAIN ACCESS TO RECEIVERALL WINB SHEETING IS AREAVW BALSA V F-3 P-4 F-5 F-H __ Ti 7K II H LEFT /ING PIAN INBOARD PANEL W-IN-SH-2N-3N-SH-SW-SW-3W-3 SWB BALSA WEB BAGSAERTICAL GRAIN EIB PLY/Bo /4 SPRUCE SPARS GEIGHT TUBEI/BBALSA WEBI VERT GRAIN/8 BALSA VB/8 fSHEETVERY GRAIN 9FLSAWY STOPAGO RIB H-H AFTER PANELS ARE JOINEE W-4 V4BALSA WEB IN POLY AREA NOTE POLYHEIWAL BRACES lAST SHOWN -f I/4SO EALSA LEADING EDGE BEVELEGAfEAESSE OF TOP-YE AEDGE OF BOTTOM-YE— B--NOT SHOWN ON L/H PANELS OUTBOARD PANEL oR-HA-A-HA-SN-IDW-I LEFT WING PLAN W-5 VB BALSA WEB HERE TO YIP 032 10 S1600 3/IN 5/Bo1o6 /16 PLT BRASS OR ALUM TUBE HORNIS 0 5/5200 GAO TUBE 2-5/4MASTER AIRFOIL-3/52 Ox Soo %5GU5LS TUBE B-"/000 TEMPLATEIS TIVEHORS BEARING ___S-VS WING POLYHEDRAL DETA L WIRE BOGS REOLIHEE WRO7/52o 7TYPICAL CROSS SECTIONI/IA F-7U I5/52 4-VS STAB 3/32 S-SWY2ATZI CANOPY HINGEVRPLY5/52 SNAP SYSTEM B-2S4 B-S 1/16 BALSA 1261 Il/ilW284 I/RBALSA RI -111 -Il FINlIIIiWEIGHT GRAIN IINLAY BET SIDESIAABB1/4 SHEETCOVEREG902 ESPY2902 LEAVE FUSELAGE COMAER SHARP AT THIS . WING LOAONU POINT PROGRESBOELY INCREASE RADIUS ruLELAGE SIE VIEWENE ELEVATOR SAYER7-z oz AFT APPROX H IS 3/52 BP20 TUBE IS BUKHEAO AIRING--C2LFTSTAB HORN BOG-I/16 OUThINE 3Fi0—A5/16 BALSA B/ V32 AFT SECTIIBO ----PLY TO FORM I/B I---I/B BALSA TOP--S- 2F3F-HSIDED B BOTTOM -T[j V /H I/O HICK BGS F-SED-TOP UI-IFETISIS S SPUPO / I/B 05 BRASS TUBE/52 PLY IF1 DOUBLER ALL CORNERS 5/52 R EUCEPT AU NOTED C USE SMALL RUDDER RUSSER B FIN ScOT NOTROOOER 0/0 /LROHOL SHOWN ON TOP VIEWEXITOLEYT TAIL GRID MASTER AIBEDIL TMPLATE CUT LEARANCE FORWING FAIRIRUS FROM S/B WOOD SHEET RING HOOKS TOP VIEW TES OUTLINE OF FUSELAGE SIGES ANTENNA EVIT SCOOTER METER NE D BY LE ON K INCAID IBBUN0 f TRACING BY JOE DENARCO %I-in basswood using master airfoil template will need tapered ap proximately /4n per top view plans wing tubes inserted through fuselage add fairing blocks check taper Trim inside surface blocks until outsides parallel blocks fit flush against fuselage parallel outside wing butts can glue place Add rear top side fuselage cross-grain sheeting tween sides wing fairing blocks October 1983 35 RD PANEL Left Wing tip ribs cut proper length stacked piece spar stock ready shaping tops per templates outer sides Right wing tip center panels joined together dihedral braces can easily installed photos author Left The wing panels have built nd sanded smooth Theyre now ready covering Note tips finished thin edge can seen wing half left Right stabilator horn place 1/32 ply horn box cover ready added Fabricate wing spacer block fit tween sides rest top F2 wing tube Sand top block airfoil shape fuselage sides fairing blocks After spacer block sanded shape cut carve sand canopy block fit over radio area neatly over spacer block Glue scrap X p approxi mately 1-in long across bottom canopy block several places properly locate canopy fuselage canopy block wing spacer block may glued togetheror left separate canopy can held place eye hooks rubberbands alternate method shown drawing may used Add small /4 sheet dorsal fin fuselage ready sand Wings layout plan may seem little strange you would rather cut up drawing place tip panels ends center panels can build complete wing halves together thats fine arranged panels way did two reasons First both tip panels can built one-piece 36-in bottom spar 36-in pieces complete rest tip panels minimum scrap same true center panels except 48-in wood used Second leave main x s piece sandwich /4-in brass wing wire tubes between spars helps keep tubes nice straight will notice bottom Wl same shape WI Consequently ribs can cut WI template guide Make two ribs Lite-Ply six /s balsa 26 Vis balsa Four teen 26 / s-in ribs tapered tip panels stack taper 14 tip ribs Select seven left panel seven right panel Using thin-line felt-tip pen mark two ribs W5 two W6 etc through WI Lay bottom spar drawing Insert rib its correct posi tion felt-tip pen hurk ribs leading edge LE trailing edge TE excess should cut off Take two WI ribs contour top airfoil shown drawing Using short piece x stock stack ribs W4 through WI contour tops Ribs W5 through W 10 same op posite panel will have re-cut top spar notch tapered ribs always assemble center panels first Yes slight bit undercamber wing dont worry about can build wing right over draving airfoil rests main spar tip trailing edge Cut leading trailing edge sheeting proper length panel Due leading edge contouring bending over ribs make sheeting about A-in wider shown drawing can cut off excess after assembly Put together both center panels same time following order Lay bottom lead ing edge sheeting drawing lining up spar Lay 42-in one-piece uncut spar top sheeting proper place can CyA-glue spar sheetingor use white glue Lay dont pin down bottom TB place remember bevel first Add W3 ribs glue spar sheeting TE Add WI ply rib brass tubing same time tilt rib 3V0 use template end brass tubing should just touch bottom spar see cross section DD important brass tube no longer shorter indicated will change angle Add top piece spar both panels Before gluing check top straightedge Make sure brass tubing squarely tween top bottom spars just touching bottom spar Add drop CyA hold tubing place Add A-in-width vertical-grain balsa webbing between end tube Rib W3 Use either scrap wood and/or micro balloons glue fill cavities side top bottom tubes Add As ply brace side tube area will sandwich tubes between spars Cut trim W2 ribs fit Make sure aft part W2 ribs level top spar necessary add Vis-in shims under W2s temporarily substitute As-in fairing sheet will added later Add vertical-grain webs between spars time may want add webs before add top spar prefer fit time whatever feel best razor plane shape LB shown add front face ribs Now will raise bottom sheeting ribsby shimming can use either long ruler TB stock good straight stock around A-in thick usually two three steps gluing CyA go 36 Model Aviation Left The stabilator rudder ready cover one-piece hinge pin used may visible magazine reproduction picture allows easy rudder removal case repairs needed Right vertical fin constructed around completed horn box fuselage sides will sandwich both sides lower fin horn box assembly provide strong stabilator support Run ruler between drawing LE sheeting until sheeting shimmed tightly against ribs Continue closing gap shims gluing until bottom sheeting completely glued ribs LE can now cut main spars center panels can moved sepa rately Note Leave off top sheeting time Due undercambered airfoil tip ribs will touching bottom TE Remove panels building board glue TE ribs dry add top TE sheeting Assemble tip panels same way center panels After panels completed except top sheeting use sanding block sand panel ends poly break until fit together perfectly Lay center panel building board shim tip panel proper angle butt-glue panels together Wipe away excess glue dry add dihedral braces side main spars back sid LE Trim taper I-in length spruce /x sq x /4 fit hollow section TE poly break strengthen joint Cut trim add W4 Use forward halves two extra W2 ribs between spars leading edge inserted against innermost W3 weight tube support Youll need two pieces /-in GD aluminum fiberglass tubing brass too heavy least 5-in long install through WI W2 ribs glue place Cardboard tubes model rocket motors would also work well Find best-fitting brass tubing avail able hobby shops will go inside aluminum tubes Cut about four pieces brass tubing will fill remov able weights Fill two about halfway lead completely fill other two A6-in brass tube 5-in long filled lead will weigh 46 oz Two tubes course will weigh 92 oz wing tube extended 7-in total weight added will about 138 oz Lay main inner wine nanel building board add top LE sheeting completely dry raise shim center panels until tip panels laying building board add outer top sheeting Befrre have pins added will need check outer panel washout Twist tip panel until tip TE between /x 3/6-in higher dihedral break set add additional pins sheeting needed Add center panel fairing sheet tween spar TE bottom side Add lock balsa between WI W2 over A-in GD rear wing wire tube hole wing half Now have add -in GD brass tube through -in hole /6 sq balsa supportat proper angle Heres Remove rear -in brass wing tube fuselage Install wing half main wing wire Using long extension drill /x-in tube very coarse teeth filed end run through fuselage fairing blocks -in hole nlv rib WI Y 2nd drill tho 3/ n block until drill goes through Rib W2 Remove wing half drill op posite half same way Add little glue brass tubing -in GD l/2-in length install hole now ready add top center fairing sheet ing cap strips wing tip block wing now complete except sanding covering OPTIONAL WEBBING Its important use spar webbing Installing webs between spars best though could glue edges shown Stabilator stab halves built almost flat sanded final shape Lay down bottom one-piece spar over drawing Cut ribs four -Ply eight /6 sheet balsa -in high Notch top bottom spars Drill Continued page 129 October 1983 37 entire tail section ready covering fitted together early preview sections easy build have good strength though lightweight beauty Scooter Two-Meter Sailplane form finish match its truly outstanding flight qualities Wing leading edge pin striping certainly decorative also thought functional least some amount turbulating effect briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 129
I SEVERAL MONTHS AGO read some claim Two-Meter RC Sail plane class dying out very popular dont know writer got source because everywhere go getting bigger ever 1982 Nats no exception Two-Meter event entries other Sailplane class several new kits size market neat designs coming out month saw some beautiful TwoMeter multi-channeled Sailplanes aile rons 1982 Nats looked number well-known outstanding pilots fly against figured Scooter best could least Scooter did its part placing first event Sailplane designed com pete hot F3B World Championship class wings built V dihedral ailerons would very com petitive does move out fastjust what designed John Gunsaullus St Petersburg FL has won several Two-Meter contests Scooter including first place 1981 Deep South Championships also fastest time recent F3B qualifying trials semi-finals flying against some excellent FAI-type aircraft really want good testimonial talk Tom Con nelly St Petersburg FL recent wins 30 Model Aviation bli surfaces removed easy packing Scooter will fit smallest com pact autos rudder removed model will fit within box just 42 long Left Every effort has made assure clean lines low drag wing-fuselage joint still simplicity Note fuselage top between wing panels airfoil-shaped Right An optional canopy arrangement has slotted wing spacer block ~snaps~ over brass wing wire tube Canopy removed can see bulkhead-mounted switch outer pushrod housing also snaps bulkhead slots Left Another view assembled optional canopy spacer block glued together simple spring-loaded pin holds down front canopy Right Wing tips simple clean Tip block shaped seine airfoil tapered rather sharp outer edge Left Extra weight windy days added inserting lead-filled partly filled brass tubes receiving holes wing Tube shown filled 410 lead slugs gun shop Right Look angle clean lines between wings fuselage obvious flying Scooter Two-Meter Unlimited classes have quickly taken him out Sportsman class Ex pert Ed Wright Jr Tampa FL has also won several first places including 1981 exceptionally easy fly Scooter Tangerine Championships worth work takes build First place get out model what put 1982 Nats against some really hot ultimate competition still competition best proof can give October 1983 31 Left Special wire hook used pulling wing-retaining rubberbands through fuselage its used hook rubber onto eye hook other wing panel Right Tail section straightforward Rudder area larger normal improve response low speeds Left Stabilator halves held place 4-40 setscrews aluminum wheel collars Note Allen wrench projecting stab Right tow hook homemade author extruded aluminum T-shaped stock commercial varieties could used General few things should shouldnt Dont use twist drill drill holes holes will drift off-center usually come out fuzzy Use drill tem plate guide piece brass tubing cutting edge filed form small teeth Use good aliphatic resin glue balsa parts fast cyanoacrylate CyA special areas good slow-drying epoxy high-strength plywood areas Dont build directly plan Cover plastic like Saran Wrap Afteryou have covered model like MonoKote save clear plastic backing lay over drawing building next model Select wood carefully Use wing spars have straight grain select ing sheeting wings use lighter wood outer panels heavier wood center Use light medium stab rudder Use lots elbow grease sandpaper finishing Templates Fabricate wing stabilizer templates before build anything else usually use A6 plywood A2 plywood Left Illustrated method drilling through fuselage ply wing rib hole balsa wing blockto insert rear wing wire tube proper dihedral angle Right front fuselage earlier version side-mounted switch various sizes brass tubing notches filed ends form cutting edges used drilling holespreferable twist drills 32 Model Aviation CHUCK WOOD l4ank ClarkA WOOD CHIP LETSGETSERIOUSCHUCk BILL THOTYOUD ANT WEALL-SUTWHATY TELL DON TOTy TV- THATLL YOUE NOT LEAVNGTHESeHEVeRA5KTRIFIC YOUR SIMMICK PUT I-MTO5LEEP DONTTY I/4SO BALSA FIN RUDDEI/4X /2 RUDDER TE HITOIC HALLS L*JTIL GIMMICkYOLhNOW WEIALL KNXK -SRULLTOOUTGUESS MLITTLE PILOT S TOPANDLEDGE YOU TELL TE 6AD LAMA SHOW BIZ- IEE N VA Sfl UP HERE HOW COME YOU -FULLA E IS cHIPr1/16 X /4 DIAGONALS LITTLe t pjI5H IT NI6HT WITH0 HES NOTA TA COMPUTE HE NOW/S BUT 1/IGRIBS I/8RIBS WATALKING DULLES1/32 PLYWOOD BOX NFR LAENCLOSES 1/16 PLYWOOD HORN AND I/B BRASS RODS N/ I- X 5/BELEVTOR T E I/B BALSA SIDES7 TOPANDBOITOM I/B PLYWOOD SIDES 3/16 X 1/4 L E1/16 X 1/4 SPARS TOP AND BOTTOM WITH 1/8 50 SPACERS BETWEEN /4 BALSA BLOCKS BETWEEN WING SPARS 1/16 X 1/4 CAPS ALL RIBS TCA/ BOTTOM 1/16 WEBS BETWEEN ALL SPARS I/BX 1/4 SPRUCE SPARS TOPAND BOlTOM BOTH WING PANELS SO TTPLFTBLOCK SO T E fl NT BRACE TUBEI/2DIA WEIGHT TUBE BRASS TUBE 1/16 PLYWOOD /4 BALSA BLOCKS 4 BALSA BLOCK SPAR WEBS WEEN SPARS TO HERE HOLLOW BLOCKFRONTAND BJ1/32 PLYWOOD BRACE JaNS WNG PANELS AT SPARS I/B PLYWOOD SIDE3/B BALSA SHEETFILL UNDER/OVER TUBE WITHTOP AND BOTTOM BOll-I PANELS ND BOTTOM PANELSWING FAIRINGSSPRUCE AND MICRO-BALLOONS 1/16 WEBS BETWEEN ALL SPARS easier cut Cut out master wing airfoil template first dont drill holes yet Next cut WI wing rib template should /16-in smaller thafl master airfoil template Drill WI first locate clamp WI master airfoil template drill master now have accurate master lay fuselage sides drilling wing wire tube holes proper location also serves contour top fuselage airfoil shape However dont build wing fuselage yet Construct stab drill rib template next stab template used drill stab ribs also stab horn Vertical fin rudder Cut out two A2 ply horn box sides shaded area shown drawing Drill slot stab bearing rear wire clearance Lay side ply box down build Y16-in spacer frame around outside edge add second side should add up / rudder thickness okay remove top side adding horn bearing horn glue top ply section place Quickly stick piece 3A2-in wire stab-horn bearing Using square make sure sides aligned wire 900 sides horn box dont want crooked stab relationship rudder Also make sure horn remains free movable dry sand front back square lay drawing construct ver tical fin movable rudder around horn box Leave small dorsal fin off time Since rudder parts ribs -in wide trailing edge stock around Yb-in add trailing edge shim ming center ribs After glue has dried can trim sand ribs top bottom fair trailing edge can now construct fuselage Fuselage recommend forward fu selage sides plus bulkheads Wl wing ribs four stab ribs cut Lite-Ply plywood available Sig light weight easy cuteven jigsaw Whether use Lite-Ply regular ply cut fuselage sides shown Use ply forward splice balsa splice rear Use master airfoil template locate wing wire tube holes drill holes required Sand fuselage sides together brass wing tubes place mas ter airfoil templates will also help sand airfoil shape top fuse lage sides Cut fuselage bottom also ply forward one-third balsa rear two-thirds Next cut out bulkheads nose block nose block constructed three pieces -in basswood center section cut out can add lead ballast Taper outside nose block shown plans Lay fuselage bottom drawing Glue nose block bulkheads set rudder horn box assembly place Notice fin leading edge just barely rests Bulkhead F7 part dry add stab pushrod outer housing through bulkheads ending F7 Add inner pushrod metal horn clevis Make sure pushrod horn operate freely Add fuselage sides Install piece -in brass tubing through wing wire tube holes help align sides usually make template piece 3-in-sq balsa sheet cutting side about 910 Use template check angle between tubing fuselage sides fuselage straight F2 F7 angle same both sides clamp sides around F3 area Clamp fuselage sides lower ply box area rudder small C-clamp clothespins Finally clamp sides nose block Add other clamps and/or pins required use slow-drying epoxy Hobby Poxy #2 sides allows enough time align everything before glue sets up can now add rudder pushrod etc Note both outer pushrod housings inner rods place can snapped up out F2 later insertion radio receiver may want run antenna tube through fuselage side usually run antenna tube 3A6-in hole HRI/4 BALSA AIBOTTOII 1r SHOWN FI 0 RIGHT WING Pt II --F 111111111 OPT AWNCRIMPF____ II WHEELENDS COLLAR IL. I I/4LB00 SHEETTUBE[7}o Li ROOT RIBPOLY BREAK TEMPLATETEMPLATE 1 FII V4 TD LITE LY / POLYNEORA& BF~ I/lB 1/4 VBOCL BALSA SPOR BET WNRS N 5PA4I5/55 6 E WISENOTEAREAINSERTE BLAIT BE S/3D D-B/W TO PORN D-I/D FILL AREA WITh SPRUCE B MICRO BALLOONS 5/B BALSA TRAIUNGI EDGEI 3/lA 1/4E-E LEADING EDGES JEAIRS.Li LaLSJLBe F 1/4 50 BALSA P.- TAIL TYP CROSS SECT EPOSY BEAD FRlIh1I -3 PIECES OF S/jIq - SSWOOD CnE.- SECTION CUT OUT WW4 CANOPY NORMALLY NOSESOWN WITh EYE AOl FOREIGHT B RUBBER BARED WEIGHT BALSA ABEA- S/A IAIEFLATBATTERYjYSABEAF PACESI TOW H A-A I-tiNCAN0PY B WING SPACER BLOCKS MAY BE GLEES TOGETIER AFER FORABBO fuselage side after covering slit MonoKote reach small hook pull out antenna Cut out two wing fairing blocks 34 Model Aviation TUBE Left Wing spacer block sits bulkhead wing wire tube After covering rear block hinged 3M tape covering material Front ot block held place canopy Right Wing spacer block canopy glued together held down rubberband eye hooks FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 1—I/IE BALGA TRAILING EDGE II~-IVt _____________________ _________________________ _________________________Ii 1II -B IIAl r 11 II I II i1 LII 11I-~IIII II1-iiIi I-u - II BALOA 0B OO BRASS TUBE WING EYE HOOKS / RIBS 3-I/2 IZ 2 EACH 3-1HLONS 2 EACH H- S/4 LONS ROOT WEBS [v32][b-2-10-1-10]]V F --F--II itII RIGHT WING PLAN OUTBOARD PANEL IIII IOR NOTE PRE-ULUE ALL WING WEBS BEFORE FINAL IIi GLUING III -II -I- F OTE RASP-IN SLOTS FOR P/H 0 GAIN ACCESS TO RECEIVERALL WINB SHEETING IS AREAVW BALSA V F-3 P-4 F-5 F-H __ Ti 7K II H LEFT /ING PIAN INBOARD PANEL W-IN-SH-2N-3N-SH-SW-SW-3W-3 SWB BALSA WEB BAGSAERTICAL GRAIN EIB PLY/Bo /4 SPRUCE SPARS GEIGHT TUBEI/BBALSA WEBI VERT GRAIN/8 BALSA VB/8 fSHEETVERY GRAIN 9FLSAWY STOPAGO RIB H-H AFTER PANELS ARE JOINEE W-4 V4BALSA WEB IN POLY AREA NOTE POLYHEIWAL BRACES lAST SHOWN -f I/4SO EALSA LEADING EDGE BEVELEGAfEAESSE OF TOP-YE AEDGE OF BOTTOM-YE— B--NOT SHOWN ON L/H PANELS OUTBOARD PANEL oR-HA-A-HA-SN-IDW-I LEFT WING PLAN W-5 VB BALSA WEB HERE TO YIP 032 10 S1600 3/IN 5/Bo1o6 /16 PLT BRASS OR ALUM TUBE HORNIS 0 5/5200 GAO TUBE 2-5/4MASTER AIRFOIL-3/52 Ox Soo %5GU5LS TUBE B-"/000 TEMPLATEIS TIVEHORS BEARING ___S-VS WING POLYHEDRAL DETA L WIRE BOGS REOLIHEE WRO7/52o 7TYPICAL CROSS SECTIONI/IA F-7U I5/52 4-VS STAB 3/32 S-SWY2ATZI CANOPY HINGEVRPLY5/52 SNAP SYSTEM B-2S4 B-S 1/16 BALSA 1261 Il/ilW284 I/RBALSA RI -111 -Il FINlIIIiWEIGHT GRAIN IINLAY BET SIDESIAABB1/4 SHEETCOVEREG902 ESPY2902 LEAVE FUSELAGE COMAER SHARP AT THIS . WING LOAONU POINT PROGRESBOELY INCREASE RADIUS ruLELAGE SIE VIEWENE ELEVATOR SAYER7-z oz AFT APPROX H IS 3/52 BP20 TUBE IS BUKHEAO AIRING--C2LFTSTAB HORN BOG-I/16 OUThINE 3Fi0—A5/16 BALSA B/ V32 AFT SECTIIBO ----PLY TO FORM I/B I---I/B BALSA TOP--S- 2F3F-HSIDED B BOTTOM -T[j V /H I/O HICK BGS F-SED-TOP UI-IFETISIS S SPUPO / I/B 05 BRASS TUBE/52 PLY IF1 DOUBLER ALL CORNERS 5/52 R EUCEPT AU NOTED C USE SMALL RUDDER RUSSER B FIN ScOT NOTROOOER 0/0 /LROHOL SHOWN ON TOP VIEWEXITOLEYT TAIL GRID MASTER AIBEDIL TMPLATE CUT LEARANCE FORWING FAIRIRUS FROM S/B WOOD SHEET RING HOOKS TOP VIEW TES OUTLINE OF FUSELAGE SIGES ANTENNA EVIT SCOOTER METER NE D BY LE ON K INCAID IBBUN0 f TRACING BY JOE DENARCO %I-in basswood using master airfoil template will need tapered ap proximately /4n per top view plans wing tubes inserted through fuselage add fairing blocks check taper Trim inside surface blocks until outsides parallel blocks fit flush against fuselage parallel outside wing butts can glue place Add rear top side fuselage cross-grain sheeting tween sides wing fairing blocks October 1983 35 RD PANEL Left Wing tip ribs cut proper length stacked piece spar stock ready shaping tops per templates outer sides Right wing tip center panels joined together dihedral braces can easily installed photos author Left The wing panels have built nd sanded smooth Theyre now ready covering Note tips finished thin edge can seen wing half left Right stabilator horn place 1/32 ply horn box cover ready added Fabricate wing spacer block fit tween sides rest top F2 wing tube Sand top block airfoil shape fuselage sides fairing blocks After spacer block sanded shape cut carve sand canopy block fit over radio area neatly over spacer block Glue scrap X p approxi mately 1-in long across bottom canopy block several places properly locate canopy fuselage canopy block wing spacer block may glued togetheror left separate canopy can held place eye hooks rubberbands alternate method shown drawing may used Add small /4 sheet dorsal fin fuselage ready sand Wings layout plan may seem little strange you would rather cut up drawing place tip panels ends center panels can build complete wing halves together thats fine arranged panels way did two reasons First both tip panels can built one-piece 36-in bottom spar 36-in pieces complete rest tip panels minimum scrap same true center panels except 48-in wood used Second leave main x s piece sandwich /4-in brass wing wire tubes between spars helps keep tubes nice straight will notice bottom Wl same shape WI Consequently ribs can cut WI template guide Make two ribs Lite-Ply six /s balsa 26 Vis balsa Four teen 26 / s-in ribs tapered tip panels stack taper 14 tip ribs Select seven left panel seven right panel Using thin-line felt-tip pen mark two ribs W5 two W6 etc through WI Lay bottom spar drawing Insert rib its correct posi tion felt-tip pen hurk ribs leading edge LE trailing edge TE excess should cut off Take two WI ribs contour top airfoil shown drawing Using short piece x stock stack ribs W4 through WI contour tops Ribs W5 through W 10 same op posite panel will have re-cut top spar notch tapered ribs always assemble center panels first Yes slight bit undercamber wing dont worry about can build wing right over draving airfoil rests main spar tip trailing edge Cut leading trailing edge sheeting proper length panel Due leading edge contouring bending over ribs make sheeting about A-in wider shown drawing can cut off excess after assembly Put together both center panels same time following order Lay bottom lead ing edge sheeting drawing lining up spar Lay 42-in one-piece uncut spar top sheeting proper place can CyA-glue spar sheetingor use white glue Lay dont pin down bottom TB place remember bevel first Add W3 ribs glue spar sheeting TE Add WI ply rib brass tubing same time tilt rib 3V0 use template end brass tubing should just touch bottom spar see cross section DD important brass tube no longer shorter indicated will change angle Add top piece spar both panels Before gluing check top straightedge Make sure brass tubing squarely tween top bottom spars just touching bottom spar Add drop CyA hold tubing place Add A-in-width vertical-grain balsa webbing between end tube Rib W3 Use either scrap wood and/or micro balloons glue fill cavities side top bottom tubes Add As ply brace side tube area will sandwich tubes between spars Cut trim W2 ribs fit Make sure aft part W2 ribs level top spar necessary add Vis-in shims under W2s temporarily substitute As-in fairing sheet will added later Add vertical-grain webs between spars time may want add webs before add top spar prefer fit time whatever feel best razor plane shape LB shown add front face ribs Now will raise bottom sheeting ribsby shimming can use either long ruler TB stock good straight stock around A-in thick usually two three steps gluing CyA go 36 Model Aviation Left The stabilator rudder ready cover one-piece hinge pin used may visible magazine reproduction picture allows easy rudder removal case repairs needed Right vertical fin constructed around completed horn box fuselage sides will sandwich both sides lower fin horn box assembly provide strong stabilator support Run ruler between drawing LE sheeting until sheeting shimmed tightly against ribs Continue closing gap shims gluing until bottom sheeting completely glued ribs LE can now cut main spars center panels can moved sepa rately Note Leave off top sheeting time Due undercambered airfoil tip ribs will touching bottom TE Remove panels building board glue TE ribs dry add top TE sheeting Assemble tip panels same way center panels After panels completed except top sheeting use sanding block sand panel ends poly break until fit together perfectly Lay center panel building board shim tip panel proper angle butt-glue panels together Wipe away excess glue dry add dihedral braces side main spars back sid LE Trim taper I-in length spruce /x sq x /4 fit hollow section TE poly break strengthen joint Cut trim add W4 Use forward halves two extra W2 ribs between spars leading edge inserted against innermost W3 weight tube support Youll need two pieces /-in GD aluminum fiberglass tubing brass too heavy least 5-in long install through WI W2 ribs glue place Cardboard tubes model rocket motors would also work well Find best-fitting brass tubing avail able hobby shops will go inside aluminum tubes Cut about four pieces brass tubing will fill remov able weights Fill two about halfway lead completely fill other two A6-in brass tube 5-in long filled lead will weigh 46 oz Two tubes course will weigh 92 oz wing tube extended 7-in total weight added will about 138 oz Lay main inner wine nanel building board add top LE sheeting completely dry raise shim center panels until tip panels laying building board add outer top sheeting Befrre have pins added will need check outer panel washout Twist tip panel until tip TE between /x 3/6-in higher dihedral break set add additional pins sheeting needed Add center panel fairing sheet tween spar TE bottom side Add lock balsa between WI W2 over A-in GD rear wing wire tube hole wing half Now have add -in GD brass tube through -in hole /6 sq balsa supportat proper angle Heres Remove rear -in brass wing tube fuselage Install wing half main wing wire Using long extension drill /x-in tube very coarse teeth filed end run through fuselage fairing blocks -in hole nlv rib WI Y 2nd drill tho 3/ n block until drill goes through Rib W2 Remove wing half drill op posite half same way Add little glue brass tubing -in GD l/2-in length install hole now ready add top center fairing sheet ing cap strips wing tip block wing now complete except sanding covering OPTIONAL WEBBING Its important use spar webbing Installing webs between spars best though could glue edges shown Stabilator stab halves built almost flat sanded final shape Lay down bottom one-piece spar over drawing Cut ribs four -Ply eight /6 sheet balsa -in high Notch top bottom spars Drill Continued page 129 October 1983 37 entire tail section ready covering fitted together early preview sections easy build have good strength though lightweight beauty Scooter Two-Meter Sailplane form finish match its truly outstanding flight qualities Wing leading edge pin striping certainly decorative also thought functional least some amount turbulating effect briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 129
I SEVERAL MONTHS AGO read some claim Two-Meter RC Sail plane class dying out very popular dont know writer got source because everywhere go getting bigger ever 1982 Nats no exception Two-Meter event entries other Sailplane class several new kits size market neat designs coming out month saw some beautiful TwoMeter multi-channeled Sailplanes aile rons 1982 Nats looked number well-known outstanding pilots fly against figured Scooter best could least Scooter did its part placing first event Sailplane designed com pete hot F3B World Championship class wings built V dihedral ailerons would very com petitive does move out fastjust what designed John Gunsaullus St Petersburg FL has won several Two-Meter contests Scooter including first place 1981 Deep South Championships also fastest time recent F3B qualifying trials semi-finals flying against some excellent FAI-type aircraft really want good testimonial talk Tom Con nelly St Petersburg FL recent wins 30 Model Aviation bli surfaces removed easy packing Scooter will fit smallest com pact autos rudder removed model will fit within box just 42 long Left Every effort has made assure clean lines low drag wing-fuselage joint still simplicity Note fuselage top between wing panels airfoil-shaped Right An optional canopy arrangement has slotted wing spacer block ~snaps~ over brass wing wire tube Canopy removed can see bulkhead-mounted switch outer pushrod housing also snaps bulkhead slots Left Another view assembled optional canopy spacer block glued together simple spring-loaded pin holds down front canopy Right Wing tips simple clean Tip block shaped seine airfoil tapered rather sharp outer edge Left Extra weight windy days added inserting lead-filled partly filled brass tubes receiving holes wing Tube shown filled 410 lead slugs gun shop Right Look angle clean lines between wings fuselage obvious flying Scooter Two-Meter Unlimited classes have quickly taken him out Sportsman class Ex pert Ed Wright Jr Tampa FL has also won several first places including 1981 exceptionally easy fly Scooter Tangerine Championships worth work takes build First place get out model what put 1982 Nats against some really hot ultimate competition still competition best proof can give October 1983 31 Left Special wire hook used pulling wing-retaining rubberbands through fuselage its used hook rubber onto eye hook other wing panel Right Tail section straightforward Rudder area larger normal improve response low speeds Left Stabilator halves held place 4-40 setscrews aluminum wheel collars Note Allen wrench projecting stab Right tow hook homemade author extruded aluminum T-shaped stock commercial varieties could used General few things should shouldnt Dont use twist drill drill holes holes will drift off-center usually come out fuzzy Use drill tem plate guide piece brass tubing cutting edge filed form small teeth Use good aliphatic resin glue balsa parts fast cyanoacrylate CyA special areas good slow-drying epoxy high-strength plywood areas Dont build directly plan Cover plastic like Saran Wrap Afteryou have covered model like MonoKote save clear plastic backing lay over drawing building next model Select wood carefully Use wing spars have straight grain select ing sheeting wings use lighter wood outer panels heavier wood center Use light medium stab rudder Use lots elbow grease sandpaper finishing Templates Fabricate wing stabilizer templates before build anything else usually use A6 plywood A2 plywood Left Illustrated method drilling through fuselage ply wing rib hole balsa wing blockto insert rear wing wire tube proper dihedral angle Right front fuselage earlier version side-mounted switch various sizes brass tubing notches filed ends form cutting edges used drilling holespreferable twist drills 32 Model Aviation CHUCK WOOD l4ank ClarkA WOOD CHIP LETSGETSERIOUSCHUCk BILL THOTYOUD ANT WEALL-SUTWHATY TELL DON TOTy TV- THATLL YOUE NOT LEAVNGTHESeHEVeRA5KTRIFIC YOUR SIMMICK PUT I-MTO5LEEP DONTTY I/4SO BALSA FIN RUDDEI/4X /2 RUDDER TE HITOIC HALLS L*JTIL GIMMICkYOLhNOW WEIALL KNXK -SRULLTOOUTGUESS MLITTLE PILOT S TOPANDLEDGE YOU TELL TE 6AD LAMA SHOW BIZ- IEE N VA Sfl UP HERE HOW COME YOU -FULLA E IS cHIPr1/16 X /4 DIAGONALS LITTLe t pjI5H IT NI6HT WITH0 HES NOTA TA COMPUTE HE NOW/S BUT 1/IGRIBS I/8RIBS WATALKING DULLES1/32 PLYWOOD BOX NFR LAENCLOSES 1/16 PLYWOOD HORN AND I/B BRASS RODS N/ I- X 5/BELEVTOR T E I/B BALSA SIDES7 TOPANDBOITOM I/B PLYWOOD SIDES 3/16 X 1/4 L E1/16 X 1/4 SPARS TOP AND BOTTOM WITH 1/8 50 SPACERS BETWEEN /4 BALSA BLOCKS BETWEEN WING SPARS 1/16 X 1/4 CAPS ALL RIBS TCA/ BOTTOM 1/16 WEBS BETWEEN ALL SPARS I/BX 1/4 SPRUCE SPARS TOPAND BOlTOM BOTH WING PANELS SO TTPLFTBLOCK SO T E fl NT BRACE TUBEI/2DIA WEIGHT TUBE BRASS TUBE 1/16 PLYWOOD /4 BALSA BLOCKS 4 BALSA BLOCK SPAR WEBS WEEN SPARS TO HERE HOLLOW BLOCKFRONTAND BJ1/32 PLYWOOD BRACE JaNS WNG PANELS AT SPARS I/B PLYWOOD SIDE3/B BALSA SHEETFILL UNDER/OVER TUBE WITHTOP AND BOTTOM BOll-I PANELS ND BOTTOM PANELSWING FAIRINGSSPRUCE AND MICRO-BALLOONS 1/16 WEBS BETWEEN ALL SPARS easier cut Cut out master wing airfoil template first dont drill holes yet Next cut WI wing rib template should /16-in smaller thafl master airfoil template Drill WI first locate clamp WI master airfoil template drill master now have accurate master lay fuselage sides drilling wing wire tube holes proper location also serves contour top fuselage airfoil shape However dont build wing fuselage yet Construct stab drill rib template next stab template used drill stab ribs also stab horn Vertical fin rudder Cut out two A2 ply horn box sides shaded area shown drawing Drill slot stab bearing rear wire clearance Lay side ply box down build Y16-in spacer frame around outside edge add second side should add up / rudder thickness okay remove top side adding horn bearing horn glue top ply section place Quickly stick piece 3A2-in wire stab-horn bearing Using square make sure sides aligned wire 900 sides horn box dont want crooked stab relationship rudder Also make sure horn remains free movable dry sand front back square lay drawing construct ver tical fin movable rudder around horn box Leave small dorsal fin off time Since rudder parts ribs -in wide trailing edge stock around Yb-in add trailing edge shim ming center ribs After glue has dried can trim sand ribs top bottom fair trailing edge can now construct fuselage Fuselage recommend forward fu selage sides plus bulkheads Wl wing ribs four stab ribs cut Lite-Ply plywood available Sig light weight easy cuteven jigsaw Whether use Lite-Ply regular ply cut fuselage sides shown Use ply forward splice balsa splice rear Use master airfoil template locate wing wire tube holes drill holes required Sand fuselage sides together brass wing tubes place mas ter airfoil templates will also help sand airfoil shape top fuse lage sides Cut fuselage bottom also ply forward one-third balsa rear two-thirds Next cut out bulkheads nose block nose block constructed three pieces -in basswood center section cut out can add lead ballast Taper outside nose block shown plans Lay fuselage bottom drawing Glue nose block bulkheads set rudder horn box assembly place Notice fin leading edge just barely rests Bulkhead F7 part dry add stab pushrod outer housing through bulkheads ending F7 Add inner pushrod metal horn clevis Make sure pushrod horn operate freely Add fuselage sides Install piece -in brass tubing through wing wire tube holes help align sides usually make template piece 3-in-sq balsa sheet cutting side about 910 Use template check angle between tubing fuselage sides fuselage straight F2 F7 angle same both sides clamp sides around F3 area Clamp fuselage sides lower ply box area rudder small C-clamp clothespins Finally clamp sides nose block Add other clamps and/or pins required use slow-drying epoxy Hobby Poxy #2 sides allows enough time align everything before glue sets up can now add rudder pushrod etc Note both outer pushrod housings inner rods place can snapped up out F2 later insertion radio receiver may want run antenna tube through fuselage side usually run antenna tube 3A6-in hole HRI/4 BALSA AIBOTTOII 1r SHOWN FI 0 RIGHT WING Pt II --F 111111111 OPT AWNCRIMPF____ II WHEELENDS COLLAR IL. I I/4LB00 SHEETTUBE[7}o Li ROOT RIBPOLY BREAK TEMPLATETEMPLATE 1 FII V4 TD LITE LY / POLYNEORA& BF~ I/lB 1/4 VBOCL BALSA SPOR BET WNRS N 5PA4I5/55 6 E WISENOTEAREAINSERTE BLAIT BE S/3D D-B/W TO PORN D-I/D FILL AREA WITh SPRUCE B MICRO BALLOONS 5/B BALSA TRAIUNGI EDGEI 3/lA 1/4E-E LEADING EDGES JEAIRS.Li LaLSJLBe F 1/4 50 BALSA P.- TAIL TYP CROSS SECT EPOSY BEAD FRlIh1I -3 PIECES OF S/jIq - SSWOOD CnE.- SECTION CUT OUT WW4 CANOPY NORMALLY NOSESOWN WITh EYE AOl FOREIGHT B RUBBER BARED WEIGHT BALSA ABEA- S/A IAIEFLATBATTERYjYSABEAF PACESI TOW H A-A I-tiNCAN0PY B WING SPACER BLOCKS MAY BE GLEES TOGETIER AFER FORABBO fuselage side after covering slit MonoKote reach small hook pull out antenna Cut out two wing fairing blocks 34 Model Aviation TUBE Left Wing spacer block sits bulkhead wing wire tube After covering rear block hinged 3M tape covering material Front ot block held place canopy Right Wing spacer block canopy glued together held down rubberband eye hooks FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 1—I/IE BALGA TRAILING EDGE II~-IVt _____________________ _________________________ _________________________Ii 1II -B IIAl r 11 II I II i1 LII 11I-~IIII II1-iiIi I-u - II BALOA 0B OO BRASS TUBE WING EYE HOOKS / RIBS 3-I/2 IZ 2 EACH 3-1HLONS 2 EACH H- S/4 LONS ROOT WEBS [v32][b-2-10-1-10]]V F --F--II itII RIGHT WING PLAN OUTBOARD PANEL IIII IOR NOTE PRE-ULUE ALL WING WEBS BEFORE FINAL IIi GLUING III -II -I- F OTE RASP-IN SLOTS FOR P/H 0 GAIN ACCESS TO RECEIVERALL WINB SHEETING IS AREAVW BALSA V F-3 P-4 F-5 F-H __ Ti 7K II H LEFT /ING PIAN INBOARD PANEL W-IN-SH-2N-3N-SH-SW-SW-3W-3 SWB BALSA WEB BAGSAERTICAL GRAIN EIB PLY/Bo /4 SPRUCE SPARS GEIGHT TUBEI/BBALSA WEBI VERT GRAIN/8 BALSA VB/8 fSHEETVERY GRAIN 9FLSAWY STOPAGO RIB H-H AFTER PANELS ARE JOINEE W-4 V4BALSA WEB IN POLY AREA NOTE POLYHEIWAL BRACES lAST SHOWN -f I/4SO EALSA LEADING EDGE BEVELEGAfEAESSE OF TOP-YE AEDGE OF BOTTOM-YE— B--NOT SHOWN ON L/H PANELS OUTBOARD PANEL oR-HA-A-HA-SN-IDW-I LEFT WING PLAN W-5 VB BALSA WEB HERE TO YIP 032 10 S1600 3/IN 5/Bo1o6 /16 PLT BRASS OR ALUM TUBE HORNIS 0 5/5200 GAO TUBE 2-5/4MASTER AIRFOIL-3/52 Ox Soo %5GU5LS TUBE B-"/000 TEMPLATEIS TIVEHORS BEARING ___S-VS WING POLYHEDRAL DETA L WIRE BOGS REOLIHEE WRO7/52o 7TYPICAL CROSS SECTIONI/IA F-7U I5/52 4-VS STAB 3/32 S-SWY2ATZI CANOPY HINGEVRPLY5/52 SNAP SYSTEM B-2S4 B-S 1/16 BALSA 1261 Il/ilW284 I/RBALSA RI -111 -Il FINlIIIiWEIGHT GRAIN IINLAY BET SIDESIAABB1/4 SHEETCOVEREG902 ESPY2902 LEAVE FUSELAGE COMAER SHARP AT THIS . WING LOAONU POINT PROGRESBOELY INCREASE RADIUS ruLELAGE SIE VIEWENE ELEVATOR SAYER7-z oz AFT APPROX H IS 3/52 BP20 TUBE IS BUKHEAO AIRING--C2LFTSTAB HORN BOG-I/16 OUThINE 3Fi0—A5/16 BALSA B/ V32 AFT SECTIIBO ----PLY TO FORM I/B I---I/B BALSA TOP--S- 2F3F-HSIDED B BOTTOM -T[j V /H I/O HICK BGS F-SED-TOP UI-IFETISIS S SPUPO / I/B 05 BRASS TUBE/52 PLY IF1 DOUBLER ALL CORNERS 5/52 R EUCEPT AU NOTED C USE SMALL RUDDER RUSSER B FIN ScOT NOTROOOER 0/0 /LROHOL SHOWN ON TOP VIEWEXITOLEYT TAIL GRID MASTER AIBEDIL TMPLATE CUT LEARANCE FORWING FAIRIRUS FROM S/B WOOD SHEET RING HOOKS TOP VIEW TES OUTLINE OF FUSELAGE SIGES ANTENNA EVIT SCOOTER METER NE D BY LE ON K INCAID IBBUN0 f TRACING BY JOE DENARCO %I-in basswood using master airfoil template will need tapered ap proximately /4n per top view plans wing tubes inserted through fuselage add fairing blocks check taper Trim inside surface blocks until outsides parallel blocks fit flush against fuselage parallel outside wing butts can glue place Add rear top side fuselage cross-grain sheeting tween sides wing fairing blocks October 1983 35 RD PANEL Left Wing tip ribs cut proper length stacked piece spar stock ready shaping tops per templates outer sides Right wing tip center panels joined together dihedral braces can easily installed photos author Left The wing panels have built nd sanded smooth Theyre now ready covering Note tips finished thin edge can seen wing half left Right stabilator horn place 1/32 ply horn box cover ready added Fabricate wing spacer block fit tween sides rest top F2 wing tube Sand top block airfoil shape fuselage sides fairing blocks After spacer block sanded shape cut carve sand canopy block fit over radio area neatly over spacer block Glue scrap X p approxi mately 1-in long across bottom canopy block several places properly locate canopy fuselage canopy block wing spacer block may glued togetheror left separate canopy can held place eye hooks rubberbands alternate method shown drawing may used Add small /4 sheet dorsal fin fuselage ready sand Wings layout plan may seem little strange you would rather cut up drawing place tip panels ends center panels can build complete wing halves together thats fine arranged panels way did two reasons First both tip panels can built one-piece 36-in bottom spar 36-in pieces complete rest tip panels minimum scrap same true center panels except 48-in wood used Second leave main x s piece sandwich /4-in brass wing wire tubes between spars helps keep tubes nice straight will notice bottom Wl same shape WI Consequently ribs can cut WI template guide Make two ribs Lite-Ply six /s balsa 26 Vis balsa Four teen 26 / s-in ribs tapered tip panels stack taper 14 tip ribs Select seven left panel seven right panel Using thin-line felt-tip pen mark two ribs W5 two W6 etc through WI Lay bottom spar drawing Insert rib its correct posi tion felt-tip pen hurk ribs leading edge LE trailing edge TE excess should cut off Take two WI ribs contour top airfoil shown drawing Using short piece x stock stack ribs W4 through WI contour tops Ribs W5 through W 10 same op posite panel will have re-cut top spar notch tapered ribs always assemble center panels first Yes slight bit undercamber wing dont worry about can build wing right over draving airfoil rests main spar tip trailing edge Cut leading trailing edge sheeting proper length panel Due leading edge contouring bending over ribs make sheeting about A-in wider shown drawing can cut off excess after assembly Put together both center panels same time following order Lay bottom lead ing edge sheeting drawing lining up spar Lay 42-in one-piece uncut spar top sheeting proper place can CyA-glue spar sheetingor use white glue Lay dont pin down bottom TB place remember bevel first Add W3 ribs glue spar sheeting TE Add WI ply rib brass tubing same time tilt rib 3V0 use template end brass tubing should just touch bottom spar see cross section DD important brass tube no longer shorter indicated will change angle Add top piece spar both panels Before gluing check top straightedge Make sure brass tubing squarely tween top bottom spars just touching bottom spar Add drop CyA hold tubing place Add A-in-width vertical-grain balsa webbing between end tube Rib W3 Use either scrap wood and/or micro balloons glue fill cavities side top bottom tubes Add As ply brace side tube area will sandwich tubes between spars Cut trim W2 ribs fit Make sure aft part W2 ribs level top spar necessary add Vis-in shims under W2s temporarily substitute As-in fairing sheet will added later Add vertical-grain webs between spars time may want add webs before add top spar prefer fit time whatever feel best razor plane shape LB shown add front face ribs Now will raise bottom sheeting ribsby shimming can use either long ruler TB stock good straight stock around A-in thick usually two three steps gluing CyA go 36 Model Aviation Left The stabilator rudder ready cover one-piece hinge pin used may visible magazine reproduction picture allows easy rudder removal case repairs needed Right vertical fin constructed around completed horn box fuselage sides will sandwich both sides lower fin horn box assembly provide strong stabilator support Run ruler between drawing LE sheeting until sheeting shimmed tightly against ribs Continue closing gap shims gluing until bottom sheeting completely glued ribs LE can now cut main spars center panels can moved sepa rately Note Leave off top sheeting time Due undercambered airfoil tip ribs will touching bottom TE Remove panels building board glue TE ribs dry add top TE sheeting Assemble tip panels same way center panels After panels completed except top sheeting use sanding block sand panel ends poly break until fit together perfectly Lay center panel building board shim tip panel proper angle butt-glue panels together Wipe away excess glue dry add dihedral braces side main spars back sid LE Trim taper I-in length spruce /x sq x /4 fit hollow section TE poly break strengthen joint Cut trim add W4 Use forward halves two extra W2 ribs between spars leading edge inserted against innermost W3 weight tube support Youll need two pieces /-in GD aluminum fiberglass tubing brass too heavy least 5-in long install through WI W2 ribs glue place Cardboard tubes model rocket motors would also work well Find best-fitting brass tubing avail able hobby shops will go inside aluminum tubes Cut about four pieces brass tubing will fill remov able weights Fill two about halfway lead completely fill other two A6-in brass tube 5-in long filled lead will weigh 46 oz Two tubes course will weigh 92 oz wing tube extended 7-in total weight added will about 138 oz Lay main inner wine nanel building board add top LE sheeting completely dry raise shim center panels until tip panels laying building board add outer top sheeting Befrre have pins added will need check outer panel washout Twist tip panel until tip TE between /x 3/6-in higher dihedral break set add additional pins sheeting needed Add center panel fairing sheet tween spar TE bottom side Add lock balsa between WI W2 over A-in GD rear wing wire tube hole wing half Now have add -in GD brass tube through -in hole /6 sq balsa supportat proper angle Heres Remove rear -in brass wing tube fuselage Install wing half main wing wire Using long extension drill /x-in tube very coarse teeth filed end run through fuselage fairing blocks -in hole nlv rib WI Y 2nd drill tho 3/ n block until drill goes through Rib W2 Remove wing half drill op posite half same way Add little glue brass tubing -in GD l/2-in length install hole now ready add top center fairing sheet ing cap strips wing tip block wing now complete except sanding covering OPTIONAL WEBBING Its important use spar webbing Installing webs between spars best though could glue edges shown Stabilator stab halves built almost flat sanded final shape Lay down bottom one-piece spar over drawing Cut ribs four -Ply eight /6 sheet balsa -in high Notch top bottom spars Drill Continued page 129 October 1983 37 entire tail section ready covering fitted together early preview sections easy build have good strength though lightweight beauty Scooter Two-Meter Sailplane form finish match its truly outstanding flight qualities Wing leading edge pin striping certainly decorative also thought functional least some amount turbulating effect briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft