NO OCR TEXT NO OCR TEXT fuselage incorporates special nose construction essentially simple plywood box balsa added permit shaping oval cross section Solid balsa tall surfaces simplify construction airfoils sanded symmetrical sections offer desired low drag THIS 5-FT SLOPE SOARER can easily quickly built can tear across sky high-speed runs can perform aerobatic maneuvers two-channel controls Inside out side loops spins extended inverted flight horizontal vertical rolls inside outside tight vertical turns blistering dives abrupt pullouts high-speed passes kinds showy flight duck soup design distinctive racy appearance rugged highly functional especially clean single nut bolt screw dowel rubberband horn pushrod hangs out ailerons can gapless Swingee fittings used ailerons linkage internal servo tucked flat wing cavity hooked directly Swingees Ailerons hooked up operate differentially Turn ing response ailerons alone no rudder excellent especially tight upelevator given after banking model pushrod flying stab entirely internal passing through fin bellcrank crisp action reliable neutral wing cleanly attached via internal hold-downs Only two little bolt heads visible bottom However 5-ft span assembled model makes small package easily transported slope site ready-to-fly condition An all-up weight 26 oz results wing loading about 8 ozIsq ft pound sheet lead can added internally increase loading higher winds style flying like Buzzbat will saunter around peace fully light wind flying gets interesting lift strong enough downstick pressure used some real speed point youd best blink make diving pass may wonder went ConstructIon Youll need following materials Wood medium-density balsa unless otherwise specified 2 x 3 x 36 ribs Four 6 x spruce spars Two 36 sub-leading edge Two 36 leading edge Two 1 x 36 beveled 1/16 x ling edge stock TE ailerons 3 x hard balsa sparwebbingfrom center Rl wing tip undersides x 36 hatch underbelly 3 x soft fin decking top wing tips 3 x /16 x 36 hard spar webbing Rl R9 interior wing saddle x 36 fuselage doublers x 36 light C-grain stab Four triangular stock joining fuselage sides formers wing ribs dihedral braces misc Four 3 x 1/16 x 36 wing sheeting cap strips ard running antenna down fuselage Spruce x o mounting Birch ply 3/, ers nose center core 24 Model Aviation Hatch merges cleanly ins wing Tairing LomDnuu WEIn IlK um nuD ails provides good wind penetration Contour-type paint scheme adds aireauraleek appearance Birch ply 1/16 x 12 x 48 slab sides bottom braces part bottom sheeting misc Birch /32 ply inlays fin Birch . ply sub-decking aft rear former Music wire 1/16 support Aluminum tubing 1/16 ID stab Two 055 1/i. x 36 music wire aileron stab pushrods Four metal devises Six 2-56 threaded couplers pushrod ends Two Swingees smaller white Delrin type available -in *4 sheet metal screws attach front hold-down 4-40 blind nut attach rear hold-down Two aileron hinges one-piece types fine Three -in 4-40 bolts round heads Tap size 4-40 4-40 self-tapping screw Two Du-Bro A6-in threaded ball links/sockets Aluminum strip Yio x wing hold-downs preferably tempered aircraft aluminum Thin sheet metal tin can etc aileron servo bracket Nylon 1A6-in sheet Sig stab bellcrank Vinyl seating tape 1/16 x saddle Brass 016 sheet making U around Swingee arms Lead 1/16-in sheet ballasting optionai Fuselage Make matched pair 1/ p1y sides As shown up 500 mAhuncased square battery pack wrapped -in latex foam bottom sides can accommodated 450 niAh pack con figured plans will also fit Use root pattern mark wing saddle contour incidence shown front hold-down bent plans space left accept large elevator servo aft former servo plan use can go forward plans show bend hold-down fcot forward notching sides front crosspiece accord ingly front former should just wide enough accept elevator servo cross wise mounting ears 4-in rails Make formers glue side fuselage other inverting assembly gcod alignment Cut attach interior saddle pieces Cut -in ply center core nose noting fits Via-in below top sides Make matched pair spacers fit against sides join front end Glue spacers core trim screw head clearance Cut ply bottom mark centerline Cut 42 birch ply hold-down crosspieces width fuselage bot tom servo used small enough go forward former cut rectangle snugly accept sideways Depending other space needs setup may placed forward battery-toreceiver adapter could also used eliminate bulky wiring harness Add triangular stock TS inside edges fuselage except hatch aft fin front Join nose core/spacer assembly sides Glue bottom crosspieces compart ment divider optional Fin Cut out shape noting goes bottom sides Make bellcrank standard 500 mAh battery pack fits nose Battery-to-receiver adapter cable usea instead bulky switch harness Hatch slides off keys accurately fuselage Wing attaches two Alien-head bolts shown nere Dritz posts sewing Item recess bolt heads provide seats protecting bottom fuselage Swingee-operated ailerons eliminate external hardware Authn says youve never tried youve mimeed * tewlf dmvi Tavi dtaii tII wn Wing trailing edge ailerons included made standard beveled stock forsimplification keep parts fabrication minimum Sig nylon Use #40 bit %2-in wireanda#51 or#S2fortheclevisforno sloppiness binding Make belicrank cutout Trim away 1/32 around bellcrank fin bottom out about inlays go easiest accomplish before balsa sections glued together using inlays marking Add 1/16 ply doublers inlays main support wire Glue inlay Position other Yi6-in shim between make keying marks drill %2-in hole sewing thread spool hole shimmed down decreasing diameter pieces tubing makes good drilling guide Place bellcrank outsides drill series holes arc front stab connecting wire smooth out rough spots Mark path pushrod through fin align servo output arm common carpenters saw can used cut pushrod slot fin bottom pushrod can made 055 1/its-in wire threaded couplers ends threaded rods inserted Y16-in dowel Assemble pushrod lay fin slot Fill underneath balsa Run Yn-in support wire through Glue other inlay rechecking alignment free movement Use Zap cyanoacrylate CyA glue wire inlays Glue Cm fuselage side flush bottom trim TS front fin Clamp fin between sides eyeball shift fin needed eliminate built-in turning tendency ignore leaning Zap 1-in length 1/ cross-grained ply subdecking top just forward Cm secure positioning Glue fin other side let 26 Model Aviation Flying stab pivots rigid support actuated pushrod/bellcrank arrangement assures well-defined neutral Pivot location stab design avoid high-speed fiutter Fin sandwiches between tue ena Olin ply sides s slim extremely strong rear Stab roots fit cieaniy fiat sides ofthefin BUZ ZBAT 2 CHANNEL SLOPE SOARER DESIGNED BY HARLEY MICHAELIS /4 BALSA C NIRA BALSA FIN~CN 3/32 BALSA /64 PLY-DOUBLER 1/32 PLY BALSA OVER 1/16 PLY KEYHOLE PLATE /8 PLY CORE 3/16BALSA WEB 1/16 PLY BOTTOM 1/16 x /4I/B SUB L E SPRUCE SPARS 26 PLY WING BRACES BALSA N N - SWINGEE 1/16 WIRE BALSA TE STOCK ONE PIECE N CAP STRIPS N NN 1/16 BALSA SHEETING TOP BOTTOM N N N- N I/4x3/8 LE glue dry fin leans hold fuselage between knees twist 1-in sections /64 ply subdecking progres sively glued CyA Its good idea protect fingers backing iron-on covering CyA fires Install elevator servo complete pushrod rear former install crosspieces etc guide route pushrod clear hold-downs Finish Y64 ply subdecking sand corners make square box Add hard balsa pine nose core front underbelly Add sheet stock ply box structure shaping fuselage using lighter balsa rear Cut hatch block profile sides fuselage Glue Ys4 ply bottom edges hatch hold-down screw goes Fit dovetailed /s ply plate atop spacer blocks between sides hatch block position drill through mounting plate estab lish common centerline screw rear keyhole slot Set adjust screw hatch punch pinholes balsa around thoroughly reinforce area thin CyA glue Make keyhole slot plate glue place Add keying plate hatch rear underside Sand down ply box corners except along saddle edges Merge /16 ply along hatch area simultaneously shaping hatch razor plane flat Permagrit tool excellent aid forming nice oval cross sections Cut glue fm extension slightly above line stab Work fin generally symmetrical airfoil keep flat stab butts Stab Cut -in balsa preferably light medium C-grain stock Lay against fin correct position mark 3Az-in ID tubes go Cut snug slots press tubes Slip halves make snug slots /16-in ID tubing Shift stab halves slots until same plane aligned well wing saddle Use tiny drop CyA secure tubes position Remove add CyA fill around tubes epoxy putty etc Shape nice symmetrical airfoil thinning toward tips Reinforce I/IS BALSA SHEETING B BALSA B PLY WINGCAP STRIPS ARE NOT SHOWN TIP-DEE CROSS SECTON THIS PANEL FOR CLARITY AT RIGHT TIP 3/32 BALSA RIBS I- II/IBI/4WINGPLANTOPVI SPRUCE SRS I-7R-6P-SR-4R-3P-S I__ AILERON HINGE / //4 50 BALSA YE STOCK SWINGEE BALSA BIB NOTE MAKE PLY RIBO& ROOT AIRFOIL 9 10 STACK CUT 3/32 BALSA SPARTRIM 2 P0~REAR WING FAIRINGRIBS-REARDOUBLERr PLY FACE ROOTR-9R-O BALSA SHEETSADDLE /4 1/6 PLYEDGE BALSATRI STOCK I/IS PLY PLANKSI/ISB" PLYI/BI/B BALSA IBALSAFUSELADE3/IS BA IA-AI/S ~M SHAPE~SHEET _____B-B WING FAIRING DETAILPLY ________BALSA DETAILSEATING 1/16 PLY KEYHOLESPACER1/4 BALSAFORMERL15WING TAPE SOLID BALSAFLATBLOCKYRI-STOCIBPOF CHEEKSA TRECEIVER ABA AREA /8 BALSA SIDES TAPER DOWN TO REAP SLAB SIDE A-/ S/ BALSA WING 3/35 PLY SADDLE FUSELAGE FORMERS 1p-I-S/B _______ 3/35 PLY FORMERS 7-I/S 7-3/4~I/8LONuOC1-3/4FUSELAGE SIDEI-3/4 H/S --- 7 3/B OFF IIS-S/BPLY FAIRING4-40 BL SOLIDORENUTFORM BA I/B PLY____ _ - zmTF AREA 7JECES/ERTh bX__ SOLI BALSA SEERAIL HARD BALSA ORCROSS SECTIONS A-B-C OPTIONAL PINE CHEEKS1/4 TRI STOCKI/IS PLY BOTTOM harden thin edges application ofoutput pushrod clears holdthin CyAdowns Adjust stab 0-0 neutral Position stab servo adjust theis line bottom fuselage 1/83/B ALUM 4-40 TAP 1/4 BALSA TRI -STOCK SAND TO PLY HERE SPACER BLOCKSLAB SIDE--450 MIL I/B PLYPAK COREKkA-lJ HARD---BATT PAK BALSA CHEEK DETAIL NOSEBALSA Left shot interior saddle pieces already 1/16 ply sides joined farmers Ply nose core/spacer glued onto front end Right Bottom croaspieces 1/16 ply glued sides triangle stock added reinforcing hatch keying plate has already glued place Elevator servo recessed fuselage bottom will attached mounting rails 28 Model Aviation 80 Full-Size Plans Available. See Page 164 XJBLERS TO1/16 BALSA SHEETING1/4 3/8 BALSA1/32 PLY CORE B LICE SHEETS-.--TOP 16 BOTTOM-BUTTLEADING EDGEI/B BALSABALSA BLOCK WING nc m nonoSUB L ETIPS I--808-0 RO I6PLYIS~VOSPRUCE 50CK5 1/16 ANG RACESI/4WEBS TO 16 d/4PLYSLOTAS THICK AS THEN 3/16 TO /16BALSA SPRUCE SWINGEE 4 WING TI OSHSTRIPS LSA WEB SPARS NOTE GRAIN BRASS U 1/4 50 BALSA NDI/I6II-IR- /83--4R-S I/I6I/2R7SPAR RB8-I ENTER-~ S OR I/lB ALSA WIRE NOTCH - _ SWINGEE 1/16 PLY ON BOTTOMSIND NUT E S100 PLY DETAIL 4 PLY~ B DEcK C-C CCW ON RIGHT AlL SERVO LOW WIREBALSA T E STOCK REVERSE FOR CWI ONE PIECE OPTIONAL 1/64 PLY GAP COVER SEE TEXT 1/16 PLY WING BRACES NO DIHEDRAL _____/ /16 PLY_______________[11 IDES___________________________________II Ii 25 FINFILL SLOT LBOERr2WINGBRACESjJ PUSHRcIO WIRE/16 PLY BOTTOM 3/32 PLY WITH BALSAIdSTAB CROSSFORMS EXTERIOR SS PIECES SEC ONCONTOUR REARI/B BALSA DETAILC GRAIN /4/ALUMINUM1/64 TUBES ________1/4 BALSA FIN EXTERSION FIN FRONT 1/16 PLY ~JBLER 1/32 PLY FIN DOUBLER I/4\l ThI STOCK BETWEEN SLAB SIDES 3/ 2 1/16 LLASTNG OPTIONS1/16SHEET LEAD 9APPROX 40Z 0 EACH DEIJBLE LAY BETWEEN NOLD DOWNS NOTE 5157 YEFFECTU/4 BALSA C RADIO SIGNAL- RUN ANTENNA HIGHIIIGRAJN IN FUSELAGEIf4I III&BALSA T 1/4 BALSA FINFIL ERFill EXT CONTOURII1/32 PLY INLAY C-CEXTENSIONI 1/16 PLY DOUBLER / jI rqj ii-1/16 NYLON SOLID BALSAIII 111/16 SEE X-SECT BALSA 1/8 BALSA OVER 1/16 PLY SIDES MW PUSHROD SLOT FOR PUSH ROD THIN CLEVIS BALSA 0I23456 FUSELAGE BOTTOM TO FIT ELEV SERVO CASE PLY KEY HATCH IL RAILS ON RIBS BRACKET TO SECURE SERVO WINGDETAIL MODEL AVIATION BUZZBAT 2 CHANNEL SLOPE SOARER SPAN 60 LENGTH 39 AREA 4S0 SQIN DESIGNED BY HARLEY MICHAELIS AMA 32343 [SF ~ ACING BY 70E DEMARcO March 1986 29 ALL RIGHTS RESERVED Left cutout made f stab belicrank slotted underneath accommodate pushrod 3/32-in stab wire rigidlysupported inthe ply inlays/doublers shimmed Spool servesasa drill guide Right Thefin isgiuded totheslab sides 1/64 ply subdecking added top bottom form ply box rugged very light enclosed hardware greatly reduces drag Left Balsa planks blocks added ply fuselage box keyed hatch installed can shaped along rest fuselage Right Balsa sheeting worked razor plane sanding block oval cross sections ply box corners Keep working until nice sculptured shape achieved Model Magic Filler used author fix gaps dings make fillets Left 1/4-in vertical webs plywood braces blind nut have installed Servo railswlll capped balsa centerthe out put wheel vertically cavity Installing 3/16-In webbing out tips next Right Simple wing construction cuts buildIng time Wing flat Permagrit sanding tool especially useful forming rib templates /32 balsa ribs Make RO R9 templates 6 ply Use cut four RO ribs two R9 ribs Clamp eight rectangles balsa between RO R9 templates stack-shape Ri through R8 Reverse templates repeat pro cedure ribs other wing half Level rib tops andtrim /i-in off top edges innermost ROs forward wing brace Cut 6 x ce spars bottom sheeting Note sheeting extends forward -in-thick sub-leading edge Butt-glue spars sheeting except vertical front wing brace goes Trim /16-in sheeting allow brace Pin sheeting ribs work surface make line ball-point pen represent rear sub-leading edge Shape fit solid trailing edge TE stock extend out R5 rib stations Note underside trimmed outermost ROs inlaid /16 ply plate mini micro servo output wheel offset holes needed ailerons Space inboard RO ribs fit servo -in rails Cut -in-deep notches TE ends RO R4 Trim ribs accord ingly Pin TE place 46-in shim strip under RO-R4 ribs Zap TE front aileron line pin down 6in strip fairly hard balsa -in balsa spar strip hinging will later added rear half now glue ribs R5 out piece Cut deep notches spar strip ribs Bevel spar strip match airfoil glue Swingees should handpicked ones move freely have minimum slop piness arm other parts held flat install glue wide strip /16 ply use /32 ply thicker Swingee onto -in balsa aile ron mounting strip aligning against spar front between ribs Swingee will lay Use #11 blade ply cut slot bottom use Swingee guide cut top sides snug fit Cut pair spruce blocks -in long -in strip Trim match Swingee thickness Insert Swingee glue blocks ply form front portion slot sides Remove Swingee Cap strip Of/16 ply complete slot Drill /i6in holes through center ply Swingee hinge line close struc ture drop CyA holes secure taking care avoid bonding moving parts Shim /6-in drill bit drill slot 30 Model Aviation Left Ribs 1-Bare shaped Permagritfile balsa rectangies clamped between plywood templates RO R9 Spruce spars butt-join sheeting eilminating rib notches Above Wing builds flatno dihedral Ribs notched stock-size beveied trail Ing edge also used ailerons Ribs flrsttacked spar CyA one glued sheeting CyA Left An aluminum bracket secures servo rails 1/16-in ball links offset output holes provide aileron differential Right brass strip around Swingee arm receives metal clevis Swingee blocked lnwith spruce ply glued CyA Left OptIonal 1/64 ply coversthe alieron gap thlsvlew underside slit rubbercement bead added cementcures acts hinge slit cracked Right Wing fairing has ply core balsa planking Hatch slides beneath streamlining Len I apered aluminum hold-downa secured wing part secret about wing held two visible screw heads Right author launches Buzzbat another flight Low drag makes ship good performer light winds aileron arm straight forward aileron neutral Use 1/64 ply shim up slot necessary Most type hinge Radio South etc good other locations -in-wide brass strip crimp Ufittings around Swingee arm threads Trim smooth matched pair Out 344 U-fitting make hole clevis pin sized neither bind sioppy Place close possible arms maximum deflection Use metal clevis keeper instead nylon type Aileron trimming will made rotation entire pushrod ball socket end Zap-glue ribs atime spar sheeting maintaining pressure against rib bottoms Check rib fronts tops straightedge sand down build up necessary achieve uniformity Put 1/16 balsa doubler front center bottom sheeting splice wing halves together Add 1/16 sheeting over tops RO ribs splice top center sheeting Cut add vertical webbing sub-leading edge Cut 1/16 ply braces go wing bottom under top sheeting Trim Y16-in ribs forward webbing glue brace flush work surface Rejoin sectioned ribs TS bracing Add block through sheeting attach front hold-down screw block must sufficient size/strength screw get good bite supports models weight G-forces Add top spar sheeting rear brace Add shape leading edge Fit glue 1/34 ply plate rear aluminum hold-down fastens Drill Continued page 117 March 1986 31 Letters Editor Continued page 12 authorized report Bills demise George L Eaton AKA CS Verral now holds copyrights Bills future Bill Barnes killed automobile ac cident No way next thing know will try tell Glenn Miller killed plane crash Bill Barnes lives Bud Overn Santa Ana CA Great men like Barnes legends Bill seen gas station Elcino Lake Charles Nats Safeway super market North Platte Truth must faced fateful day 1952 great pilot foolishly ventured out red Volks wagen van near-hurricane conditions demise covered up CIA due planned highly-sensitive mission Near East could have brought lasting peace region New York Times reluctantly deleted obit Since Frank Tinsley retired happy mayor New England town friends hid news sad event would have broken heart Yes party New York town house reported pa pers Bud Ovem may aware Barnes identical twin perhaps thwarted Japanese Aleu tians Until secret file Pentagon declassffied lips sealed Shorty Sandy party might see things after happy consump tion colorless odorless liquid olives toothpicks butler whispered man New Yorker old times sake Russian-like liquid actually Barnes secret engine coolant drained through loaves white bread Pepperidge family size stood end remove toxic agent Perhaps will news Bud real Sandy always wore green silk shirt first three buttons open reveal tatoo Stormer Sandy wore polka-dot tie nightdoesnt square Having visited soft-spoken FBI type still-secret file can say no EditorPublisher Wheeley has firmly advised same operator publish another word about Barnes case closed Since personally edited Chuck Ver rals copy George L Eaton will sign affidavit Chuck shared chore alternate-month basis Harold Mon tanye Bud Overn Chuck others will remiss Monty forgotten pal Bill playing tennis Gosh Chuck cant tell brothers apart Bill Winter Fairfax VA Buzzbat Continued page 31 hole 4-40 blind nut near plate front dead center wing Make rear hold-down bends somewhat rounded available use tempered aircraft-type aluminum Center punch bent ends out about Y16 drill %2-in holes Tap 4-40 threads Temporarily attach hold-down set wing position saddle Mark hole fuselage bottom drilled Repeat front hold-down foot bent forward accommodate servo locate front hole making template scrap balsa match hold-down hole spacing Lay template fuselage bottom mark Drill holes fuselage resting firmly block making final installation hold-downs glue notched ply plates wing around cant rotate Extend bottom sheeting toward aileron servo minimize open area enclosed fuselage Cut x 1in piece -in birch ply glue centered inside extend over ply plate adjacent bottom sheeting Drill through 4-40 blind nut Attach -in balsa vertical crosspiece aft servo Add TS places ply plate other bottom sheeting meets other Continued page 120 March1986 117 K responding advertisers mention read about Model Aviation DALLAIRE SPORTSTER SPECIFICATIONS Wing Span 72 Inches Wing Chord 11 Inches Power 21-30 Engine Radio 3 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware %$OLD TIMER Rt 1 Box 190 a MS 38754 Telephone 601 2473578 Buzzbat Continued page 117 structural members common damage bad landing piy plates breaking away Add remaining top center sheeting cap strips ex treme tips ply facing wing faking can shaped tack-glued hatch rear broken away glued leading edge wing mounted remainder faking fitted Magic Model Filler can smooth everything out Temporarily add 6-in seating tape adding facingto get good merge between hatch fairing Aileron servo installation Rails glued inside inboard RO ribs po sitioned center servo output wheel vertically cavity metal bracket screws over servo case under side cutout sheeting over servo wheel gives /1-in space Butt servo bottom against rear brace flopped cable best clears front hold-down Aileron differential up down provided placing Yie-in ball links offset holes output wheel Try 450 get least twice much up down avoid adverse yaw Use hole radius least /16 get enough aileron movement Servo-to Swingee linkup plans show applies small white Swingee control wire will run high low ball links side wheel builder dark opposing Swingees used both ball links can top bottom wheel preferably bottom easier access Study servo rotation corresponding Swingee action planes rear radio observe whats happening As turns linear movement up-aileron must greater Tape ailerons neutral Mark cut paths holes pushrod wires through ribs Use coupler suf ficient threads adjustments solder coupler wire aileron end Put metal clevis centered threads use keeper radio output wheel neutral sockets couplers mark wires cut servo end go deep couplers Cut epoxy wires couplers avoid bonding Swingee parts secure rear portions CyA dropped through small holes made balsa Optional aileron gap covers An idea better gap covers referred plans came after plans inked After covered allerons installed cut -in-wide strip thin rigid plastic 3 mil clear drafting Mylar excellent attach -in-wide double-sticky clear Scotch tape can external under covering wing low heat used Static electricity requires clean environ ment following steps First tape -in strip cutto length work sufface bits black tape placed edge stretch care fully lower position length doublesticky tape accurately other long edge some excess both ends Remove black tape Holding excess ends carefully position over gap slowly lower position Trim excess Finishing various tex coverings bear up better fuselage unrein forced films single 8-in-wide piece can fuselage Make overlaps forward fm around nose Alter fuselage covered protect raw edges around bolt holes large washer eyelet bushing broad flange #5 Dritz Mighty Snaps packet size 24 sewing outlets contains posts well-suited application Put -in dense latex foam Ace Sig etc around three sides fronts battery receiver hatch underside can hollowed out necessary Run antenna down fuselage -in balsa stick typical switch harness nuis ance install since full charge should give three four hours operation battery-to-receiver adapter practical alternative Balance trim saddle cut conform plans wing has 10 incidence Balanced out stab 0-0 little tendency bailcon ship must flown out its heading Use 450 500 mAh pack Vie-in sheet lead squares forward battery balancing necessary Balancing point shown plans enough stab throw will permit gcod spins may fly too squirrely first low-time pilots youre experi enced pilot balance model begin spar trim elevator level flight Keep stab throw front about Ye way initially ship touchy pitch axis After familiarity may want increase throw obtain true spins tighter turns etc Use dual rate setting trans mitter available Tight spins possible adequate stab movement center gravity CG too far ward Some pictures show larger fin hampered spins fm size plans gives ample directional stabil ity akspeeds up tip walk experienced increase aileron differ ential bottom ballast used larger groinmets can adjusted vertically wing hold-downs hold lead onto fuse lage bottom sure sheet lead weights cut folded maintain desired balance point FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY 120 Model Aviation ONLY $4995 Atom Back Approx Wi 175 oz Displacement 09 Cu Bore-5 Stroke 5 Piston Steel Crank CaseMagnesium Alloy inal Crankshaft Bearing Silicon Bronze Cylinder- Chromally Steel Approx RPM -12000 Grey Cox 7 x 4 prop FOBLsAngebs cA cA residents add 6% Sales Tax Order Direct ATOM smallest Ignition engines ever produced Designed R Arden further developments John Morrill Simplex Engines Limited Production Run Delivery 10 12 weeks ARO will receive within 7 days order con firming postcard verify receipt order give assigned engine number ap proximate delivery date Morrill-ADC PO Box 1210 Simi Valley CA 93062
Edition: Model Aviation - 1986/03
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 117, 120
NO OCR TEXT NO OCR TEXT fuselage incorporates special nose construction essentially simple plywood box balsa added permit shaping oval cross section Solid balsa tall surfaces simplify construction airfoils sanded symmetrical sections offer desired low drag THIS 5-FT SLOPE SOARER can easily quickly built can tear across sky high-speed runs can perform aerobatic maneuvers two-channel controls Inside out side loops spins extended inverted flight horizontal vertical rolls inside outside tight vertical turns blistering dives abrupt pullouts high-speed passes kinds showy flight duck soup design distinctive racy appearance rugged highly functional especially clean single nut bolt screw dowel rubberband horn pushrod hangs out ailerons can gapless Swingee fittings used ailerons linkage internal servo tucked flat wing cavity hooked directly Swingees Ailerons hooked up operate differentially Turn ing response ailerons alone no rudder excellent especially tight upelevator given after banking model pushrod flying stab entirely internal passing through fin bellcrank crisp action reliable neutral wing cleanly attached via internal hold-downs Only two little bolt heads visible bottom However 5-ft span assembled model makes small package easily transported slope site ready-to-fly condition An all-up weight 26 oz results wing loading about 8 ozIsq ft pound sheet lead can added internally increase loading higher winds style flying like Buzzbat will saunter around peace fully light wind flying gets interesting lift strong enough downstick pressure used some real speed point youd best blink make diving pass may wonder went ConstructIon Youll need following materials Wood medium-density balsa unless otherwise specified 2 x 3 x 36 ribs Four 6 x spruce spars Two 36 sub-leading edge Two 36 leading edge Two 1 x 36 beveled 1/16 x ling edge stock TE ailerons 3 x hard balsa sparwebbingfrom center Rl wing tip undersides x 36 hatch underbelly 3 x soft fin decking top wing tips 3 x /16 x 36 hard spar webbing Rl R9 interior wing saddle x 36 fuselage doublers x 36 light C-grain stab Four triangular stock joining fuselage sides formers wing ribs dihedral braces misc Four 3 x 1/16 x 36 wing sheeting cap strips ard running antenna down fuselage Spruce x o mounting Birch ply 3/, ers nose center core 24 Model Aviation Hatch merges cleanly ins wing Tairing LomDnuu WEIn IlK um nuD ails provides good wind penetration Contour-type paint scheme adds aireauraleek appearance Birch ply 1/16 x 12 x 48 slab sides bottom braces part bottom sheeting misc Birch /32 ply inlays fin Birch . ply sub-decking aft rear former Music wire 1/16 support Aluminum tubing 1/16 ID stab Two 055 1/i. x 36 music wire aileron stab pushrods Four metal devises Six 2-56 threaded couplers pushrod ends Two Swingees smaller white Delrin type available -in *4 sheet metal screws attach front hold-down 4-40 blind nut attach rear hold-down Two aileron hinges one-piece types fine Three -in 4-40 bolts round heads Tap size 4-40 4-40 self-tapping screw Two Du-Bro A6-in threaded ball links/sockets Aluminum strip Yio x wing hold-downs preferably tempered aircraft aluminum Thin sheet metal tin can etc aileron servo bracket Nylon 1A6-in sheet Sig stab bellcrank Vinyl seating tape 1/16 x saddle Brass 016 sheet making U around Swingee arms Lead 1/16-in sheet ballasting optionai Fuselage Make matched pair 1/ p1y sides As shown up 500 mAhuncased square battery pack wrapped -in latex foam bottom sides can accommodated 450 niAh pack con figured plans will also fit Use root pattern mark wing saddle contour incidence shown front hold-down bent plans space left accept large elevator servo aft former servo plan use can go forward plans show bend hold-down fcot forward notching sides front crosspiece accord ingly front former should just wide enough accept elevator servo cross wise mounting ears 4-in rails Make formers glue side fuselage other inverting assembly gcod alignment Cut attach interior saddle pieces Cut -in ply center core nose noting fits Via-in below top sides Make matched pair spacers fit against sides join front end Glue spacers core trim screw head clearance Cut ply bottom mark centerline Cut 42 birch ply hold-down crosspieces width fuselage bot tom servo used small enough go forward former cut rectangle snugly accept sideways Depending other space needs setup may placed forward battery-toreceiver adapter could also used eliminate bulky wiring harness Add triangular stock TS inside edges fuselage except hatch aft fin front Join nose core/spacer assembly sides Glue bottom crosspieces compart ment divider optional Fin Cut out shape noting goes bottom sides Make bellcrank standard 500 mAh battery pack fits nose Battery-to-receiver adapter cable usea instead bulky switch harness Hatch slides off keys accurately fuselage Wing attaches two Alien-head bolts shown nere Dritz posts sewing Item recess bolt heads provide seats protecting bottom fuselage Swingee-operated ailerons eliminate external hardware Authn says youve never tried youve mimeed * tewlf dmvi Tavi dtaii tII wn Wing trailing edge ailerons included made standard beveled stock forsimplification keep parts fabrication minimum Sig nylon Use #40 bit %2-in wireanda#51 or#S2fortheclevisforno sloppiness binding Make belicrank cutout Trim away 1/32 around bellcrank fin bottom out about inlays go easiest accomplish before balsa sections glued together using inlays marking Add 1/16 ply doublers inlays main support wire Glue inlay Position other Yi6-in shim between make keying marks drill %2-in hole sewing thread spool hole shimmed down decreasing diameter pieces tubing makes good drilling guide Place bellcrank outsides drill series holes arc front stab connecting wire smooth out rough spots Mark path pushrod through fin align servo output arm common carpenters saw can used cut pushrod slot fin bottom pushrod can made 055 1/its-in wire threaded couplers ends threaded rods inserted Y16-in dowel Assemble pushrod lay fin slot Fill underneath balsa Run Yn-in support wire through Glue other inlay rechecking alignment free movement Use Zap cyanoacrylate CyA glue wire inlays Glue Cm fuselage side flush bottom trim TS front fin Clamp fin between sides eyeball shift fin needed eliminate built-in turning tendency ignore leaning Zap 1-in length 1/ cross-grained ply subdecking top just forward Cm secure positioning Glue fin other side let 26 Model Aviation Flying stab pivots rigid support actuated pushrod/bellcrank arrangement assures well-defined neutral Pivot location stab design avoid high-speed fiutter Fin sandwiches between tue ena Olin ply sides s slim extremely strong rear Stab roots fit cieaniy fiat sides ofthefin BUZ ZBAT 2 CHANNEL SLOPE SOARER DESIGNED BY HARLEY MICHAELIS /4 BALSA C NIRA BALSA FIN~CN 3/32 BALSA /64 PLY-DOUBLER 1/32 PLY BALSA OVER 1/16 PLY KEYHOLE PLATE /8 PLY CORE 3/16BALSA WEB 1/16 PLY BOTTOM 1/16 x /4I/B SUB L E SPRUCE SPARS 26 PLY WING BRACES BALSA N N - SWINGEE 1/16 WIRE BALSA TE STOCK ONE PIECE N CAP STRIPS N NN 1/16 BALSA SHEETING TOP BOTTOM N N N- N I/4x3/8 LE glue dry fin leans hold fuselage between knees twist 1-in sections /64 ply subdecking progres sively glued CyA Its good idea protect fingers backing iron-on covering CyA fires Install elevator servo complete pushrod rear former install crosspieces etc guide route pushrod clear hold-downs Finish Y64 ply subdecking sand corners make square box Add hard balsa pine nose core front underbelly Add sheet stock ply box structure shaping fuselage using lighter balsa rear Cut hatch block profile sides fuselage Glue Ys4 ply bottom edges hatch hold-down screw goes Fit dovetailed /s ply plate atop spacer blocks between sides hatch block position drill through mounting plate estab lish common centerline screw rear keyhole slot Set adjust screw hatch punch pinholes balsa around thoroughly reinforce area thin CyA glue Make keyhole slot plate glue place Add keying plate hatch rear underside Sand down ply box corners except along saddle edges Merge /16 ply along hatch area simultaneously shaping hatch razor plane flat Permagrit tool excellent aid forming nice oval cross sections Cut glue fm extension slightly above line stab Work fin generally symmetrical airfoil keep flat stab butts Stab Cut -in balsa preferably light medium C-grain stock Lay against fin correct position mark 3Az-in ID tubes go Cut snug slots press tubes Slip halves make snug slots /16-in ID tubing Shift stab halves slots until same plane aligned well wing saddle Use tiny drop CyA secure tubes position Remove add CyA fill around tubes epoxy putty etc Shape nice symmetrical airfoil thinning toward tips Reinforce I/IS BALSA SHEETING B BALSA B PLY WINGCAP STRIPS ARE NOT SHOWN TIP-DEE CROSS SECTON THIS PANEL FOR CLARITY AT RIGHT TIP 3/32 BALSA RIBS I- II/IBI/4WINGPLANTOPVI SPRUCE SRS I-7R-6P-SR-4R-3P-S I__ AILERON HINGE / //4 50 BALSA YE STOCK SWINGEE BALSA BIB NOTE MAKE PLY RIBO& ROOT AIRFOIL 9 10 STACK CUT 3/32 BALSA SPARTRIM 2 P0~REAR WING FAIRINGRIBS-REARDOUBLERr PLY FACE ROOTR-9R-O BALSA SHEETSADDLE /4 1/6 PLYEDGE BALSATRI STOCK I/IS PLY PLANKSI/ISB" PLYI/BI/B BALSA IBALSAFUSELADE3/IS BA IA-AI/S ~M SHAPE~SHEET _____B-B WING FAIRING DETAILPLY ________BALSA DETAILSEATING 1/16 PLY KEYHOLESPACER1/4 BALSAFORMERL15WING TAPE SOLID BALSAFLATBLOCKYRI-STOCIBPOF CHEEKSA TRECEIVER ABA AREA /8 BALSA SIDES TAPER DOWN TO REAP SLAB SIDE A-/ S/ BALSA WING 3/35 PLY SADDLE FUSELAGE FORMERS 1p-I-S/B _______ 3/35 PLY FORMERS 7-I/S 7-3/4~I/8LONuOC1-3/4FUSELAGE SIDEI-3/4 H/S --- 7 3/B OFF IIS-S/BPLY FAIRING4-40 BL SOLIDORENUTFORM BA I/B PLY____ _ - zmTF AREA 7JECES/ERTh bX__ SOLI BALSA SEERAIL HARD BALSA ORCROSS SECTIONS A-B-C OPTIONAL PINE CHEEKS1/4 TRI STOCKI/IS PLY BOTTOM harden thin edges application ofoutput pushrod clears holdthin CyAdowns Adjust stab 0-0 neutral Position stab servo adjust theis line bottom fuselage 1/83/B ALUM 4-40 TAP 1/4 BALSA TRI -STOCK SAND TO PLY HERE SPACER BLOCKSLAB SIDE--450 MIL I/B PLYPAK COREKkA-lJ HARD---BATT PAK BALSA CHEEK DETAIL NOSEBALSA Left shot interior saddle pieces already 1/16 ply sides joined farmers Ply nose core/spacer glued onto front end Right Bottom croaspieces 1/16 ply glued sides triangle stock added reinforcing hatch keying plate has already glued place Elevator servo recessed fuselage bottom will attached mounting rails 28 Model Aviation 80 Full-Size Plans Available. See Page 164 XJBLERS TO1/16 BALSA SHEETING1/4 3/8 BALSA1/32 PLY CORE B LICE SHEETS-.--TOP 16 BOTTOM-BUTTLEADING EDGEI/B BALSABALSA BLOCK WING nc m nonoSUB L ETIPS I--808-0 RO I6PLYIS~VOSPRUCE 50CK5 1/16 ANG RACESI/4WEBS TO 16 d/4PLYSLOTAS THICK AS THEN 3/16 TO /16BALSA SPRUCE SWINGEE 4 WING TI OSHSTRIPS LSA WEB SPARS NOTE GRAIN BRASS U 1/4 50 BALSA NDI/I6II-IR- /83--4R-S I/I6I/2R7SPAR RB8-I ENTER-~ S OR I/lB ALSA WIRE NOTCH - _ SWINGEE 1/16 PLY ON BOTTOMSIND NUT E S100 PLY DETAIL 4 PLY~ B DEcK C-C CCW ON RIGHT AlL SERVO LOW WIREBALSA T E STOCK REVERSE FOR CWI ONE PIECE OPTIONAL 1/64 PLY GAP COVER SEE TEXT 1/16 PLY WING BRACES NO DIHEDRAL _____/ /16 PLY_______________[11 IDES___________________________________II Ii 25 FINFILL SLOT LBOERr2WINGBRACESjJ PUSHRcIO WIRE/16 PLY BOTTOM 3/32 PLY WITH BALSAIdSTAB CROSSFORMS EXTERIOR SS PIECES SEC ONCONTOUR REARI/B BALSA DETAILC GRAIN /4/ALUMINUM1/64 TUBES ________1/4 BALSA FIN EXTERSION FIN FRONT 1/16 PLY ~JBLER 1/32 PLY FIN DOUBLER I/4\l ThI STOCK BETWEEN SLAB SIDES 3/ 2 1/16 LLASTNG OPTIONS1/16SHEET LEAD 9APPROX 40Z 0 EACH DEIJBLE LAY BETWEEN NOLD DOWNS NOTE 5157 YEFFECTU/4 BALSA C RADIO SIGNAL- RUN ANTENNA HIGHIIIGRAJN IN FUSELAGEIf4I III&BALSA T 1/4 BALSA FINFIL ERFill EXT CONTOURII1/32 PLY INLAY C-CEXTENSIONI 1/16 PLY DOUBLER / jI rqj ii-1/16 NYLON SOLID BALSAIII 111/16 SEE X-SECT BALSA 1/8 BALSA OVER 1/16 PLY SIDES MW PUSHROD SLOT FOR PUSH ROD THIN CLEVIS BALSA 0I23456 FUSELAGE BOTTOM TO FIT ELEV SERVO CASE PLY KEY HATCH IL RAILS ON RIBS BRACKET TO SECURE SERVO WINGDETAIL MODEL AVIATION BUZZBAT 2 CHANNEL SLOPE SOARER SPAN 60 LENGTH 39 AREA 4S0 SQIN DESIGNED BY HARLEY MICHAELIS AMA 32343 [SF ~ ACING BY 70E DEMARcO March 1986 29 ALL RIGHTS RESERVED Left cutout made f stab belicrank slotted underneath accommodate pushrod 3/32-in stab wire rigidlysupported inthe ply inlays/doublers shimmed Spool servesasa drill guide Right Thefin isgiuded totheslab sides 1/64 ply subdecking added top bottom form ply box rugged very light enclosed hardware greatly reduces drag Left Balsa planks blocks added ply fuselage box keyed hatch installed can shaped along rest fuselage Right Balsa sheeting worked razor plane sanding block oval cross sections ply box corners Keep working until nice sculptured shape achieved Model Magic Filler used author fix gaps dings make fillets Left 1/4-in vertical webs plywood braces blind nut have installed Servo railswlll capped balsa centerthe out put wheel vertically cavity Installing 3/16-In webbing out tips next Right Simple wing construction cuts buildIng time Wing flat Permagrit sanding tool especially useful forming rib templates /32 balsa ribs Make RO R9 templates 6 ply Use cut four RO ribs two R9 ribs Clamp eight rectangles balsa between RO R9 templates stack-shape Ri through R8 Reverse templates repeat pro cedure ribs other wing half Level rib tops andtrim /i-in off top edges innermost ROs forward wing brace Cut 6 x ce spars bottom sheeting Note sheeting extends forward -in-thick sub-leading edge Butt-glue spars sheeting except vertical front wing brace goes Trim /16-in sheeting allow brace Pin sheeting ribs work surface make line ball-point pen represent rear sub-leading edge Shape fit solid trailing edge TE stock extend out R5 rib stations Note underside trimmed outermost ROs inlaid /16 ply plate mini micro servo output wheel offset holes needed ailerons Space inboard RO ribs fit servo -in rails Cut -in-deep notches TE ends RO R4 Trim ribs accord ingly Pin TE place 46-in shim strip under RO-R4 ribs Zap TE front aileron line pin down 6in strip fairly hard balsa -in balsa spar strip hinging will later added rear half now glue ribs R5 out piece Cut deep notches spar strip ribs Bevel spar strip match airfoil glue Swingees should handpicked ones move freely have minimum slop piness arm other parts held flat install glue wide strip /16 ply use /32 ply thicker Swingee onto -in balsa aile ron mounting strip aligning against spar front between ribs Swingee will lay Use #11 blade ply cut slot bottom use Swingee guide cut top sides snug fit Cut pair spruce blocks -in long -in strip Trim match Swingee thickness Insert Swingee glue blocks ply form front portion slot sides Remove Swingee Cap strip Of/16 ply complete slot Drill /i6in holes through center ply Swingee hinge line close struc ture drop CyA holes secure taking care avoid bonding moving parts Shim /6-in drill bit drill slot 30 Model Aviation Left Ribs 1-Bare shaped Permagritfile balsa rectangies clamped between plywood templates RO R9 Spruce spars butt-join sheeting eilminating rib notches Above Wing builds flatno dihedral Ribs notched stock-size beveied trail Ing edge also used ailerons Ribs flrsttacked spar CyA one glued sheeting CyA Left An aluminum bracket secures servo rails 1/16-in ball links offset output holes provide aileron differential Right brass strip around Swingee arm receives metal clevis Swingee blocked lnwith spruce ply glued CyA Left OptIonal 1/64 ply coversthe alieron gap thlsvlew underside slit rubbercement bead added cementcures acts hinge slit cracked Right Wing fairing has ply core balsa planking Hatch slides beneath streamlining Len I apered aluminum hold-downa secured wing part secret about wing held two visible screw heads Right author launches Buzzbat another flight Low drag makes ship good performer light winds aileron arm straight forward aileron neutral Use 1/64 ply shim up slot necessary Most type hinge Radio South etc good other locations -in-wide brass strip crimp Ufittings around Swingee arm threads Trim smooth matched pair Out 344 U-fitting make hole clevis pin sized neither bind sioppy Place close possible arms maximum deflection Use metal clevis keeper instead nylon type Aileron trimming will made rotation entire pushrod ball socket end Zap-glue ribs atime spar sheeting maintaining pressure against rib bottoms Check rib fronts tops straightedge sand down build up necessary achieve uniformity Put 1/16 balsa doubler front center bottom sheeting splice wing halves together Add 1/16 sheeting over tops RO ribs splice top center sheeting Cut add vertical webbing sub-leading edge Cut 1/16 ply braces go wing bottom under top sheeting Trim Y16-in ribs forward webbing glue brace flush work surface Rejoin sectioned ribs TS bracing Add block through sheeting attach front hold-down screw block must sufficient size/strength screw get good bite supports models weight G-forces Add top spar sheeting rear brace Add shape leading edge Fit glue 1/34 ply plate rear aluminum hold-down fastens Drill Continued page 117 March 1986 31 Letters Editor Continued page 12 authorized report Bills demise George L Eaton AKA CS Verral now holds copyrights Bills future Bill Barnes killed automobile ac cident No way next thing know will try tell Glenn Miller killed plane crash Bill Barnes lives Bud Overn Santa Ana CA Great men like Barnes legends Bill seen gas station Elcino Lake Charles Nats Safeway super market North Platte Truth must faced fateful day 1952 great pilot foolishly ventured out red Volks wagen van near-hurricane conditions demise covered up CIA due planned highly-sensitive mission Near East could have brought lasting peace region New York Times reluctantly deleted obit Since Frank Tinsley retired happy mayor New England town friends hid news sad event would have broken heart Yes party New York town house reported pa pers Bud Ovem may aware Barnes identical twin perhaps thwarted Japanese Aleu tians Until secret file Pentagon declassffied lips sealed Shorty Sandy party might see things after happy consump tion colorless odorless liquid olives toothpicks butler whispered man New Yorker old times sake Russian-like liquid actually Barnes secret engine coolant drained through loaves white bread Pepperidge family size stood end remove toxic agent Perhaps will news Bud real Sandy always wore green silk shirt first three buttons open reveal tatoo Stormer Sandy wore polka-dot tie nightdoesnt square Having visited soft-spoken FBI type still-secret file can say no EditorPublisher Wheeley has firmly advised same operator publish another word about Barnes case closed Since personally edited Chuck Ver rals copy George L Eaton will sign affidavit Chuck shared chore alternate-month basis Harold Mon tanye Bud Overn Chuck others will remiss Monty forgotten pal Bill playing tennis Gosh Chuck cant tell brothers apart Bill Winter Fairfax VA Buzzbat Continued page 31 hole 4-40 blind nut near plate front dead center wing Make rear hold-down bends somewhat rounded available use tempered aircraft-type aluminum Center punch bent ends out about Y16 drill %2-in holes Tap 4-40 threads Temporarily attach hold-down set wing position saddle Mark hole fuselage bottom drilled Repeat front hold-down foot bent forward accommodate servo locate front hole making template scrap balsa match hold-down hole spacing Lay template fuselage bottom mark Drill holes fuselage resting firmly block making final installation hold-downs glue notched ply plates wing around cant rotate Extend bottom sheeting toward aileron servo minimize open area enclosed fuselage Cut x 1in piece -in birch ply glue centered inside extend over ply plate adjacent bottom sheeting Drill through 4-40 blind nut Attach -in balsa vertical crosspiece aft servo Add TS places ply plate other bottom sheeting meets other Continued page 120 March1986 117 K responding advertisers mention read about Model Aviation DALLAIRE SPORTSTER SPECIFICATIONS Wing Span 72 Inches Wing Chord 11 Inches Power 21-30 Engine Radio 3 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware %$OLD TIMER Rt 1 Box 190 a MS 38754 Telephone 601 2473578 Buzzbat Continued page 117 structural members common damage bad landing piy plates breaking away Add remaining top center sheeting cap strips ex treme tips ply facing wing faking can shaped tack-glued hatch rear broken away glued leading edge wing mounted remainder faking fitted Magic Model Filler can smooth everything out Temporarily add 6-in seating tape adding facingto get good merge between hatch fairing Aileron servo installation Rails glued inside inboard RO ribs po sitioned center servo output wheel vertically cavity metal bracket screws over servo case under side cutout sheeting over servo wheel gives /1-in space Butt servo bottom against rear brace flopped cable best clears front hold-down Aileron differential up down provided placing Yie-in ball links offset holes output wheel Try 450 get least twice much up down avoid adverse yaw Use hole radius least /16 get enough aileron movement Servo-to Swingee linkup plans show applies small white Swingee control wire will run high low ball links side wheel builder dark opposing Swingees used both ball links can top bottom wheel preferably bottom easier access Study servo rotation corresponding Swingee action planes rear radio observe whats happening As turns linear movement up-aileron must greater Tape ailerons neutral Mark cut paths holes pushrod wires through ribs Use coupler suf ficient threads adjustments solder coupler wire aileron end Put metal clevis centered threads use keeper radio output wheel neutral sockets couplers mark wires cut servo end go deep couplers Cut epoxy wires couplers avoid bonding Swingee parts secure rear portions CyA dropped through small holes made balsa Optional aileron gap covers An idea better gap covers referred plans came after plans inked After covered allerons installed cut -in-wide strip thin rigid plastic 3 mil clear drafting Mylar excellent attach -in-wide double-sticky clear Scotch tape can external under covering wing low heat used Static electricity requires clean environ ment following steps First tape -in strip cutto length work sufface bits black tape placed edge stretch care fully lower position length doublesticky tape accurately other long edge some excess both ends Remove black tape Holding excess ends carefully position over gap slowly lower position Trim excess Finishing various tex coverings bear up better fuselage unrein forced films single 8-in-wide piece can fuselage Make overlaps forward fm around nose Alter fuselage covered protect raw edges around bolt holes large washer eyelet bushing broad flange #5 Dritz Mighty Snaps packet size 24 sewing outlets contains posts well-suited application Put -in dense latex foam Ace Sig etc around three sides fronts battery receiver hatch underside can hollowed out necessary Run antenna down fuselage -in balsa stick typical switch harness nuis ance install since full charge should give three four hours operation battery-to-receiver adapter practical alternative Balance trim saddle cut conform plans wing has 10 incidence Balanced out stab 0-0 little tendency bailcon ship must flown out its heading Use 450 500 mAh pack Vie-in sheet lead squares forward battery balancing necessary Balancing point shown plans enough stab throw will permit gcod spins may fly too squirrely first low-time pilots youre experi enced pilot balance model begin spar trim elevator level flight Keep stab throw front about Ye way initially ship touchy pitch axis After familiarity may want increase throw obtain true spins tighter turns etc Use dual rate setting trans mitter available Tight spins possible adequate stab movement center gravity CG too far ward Some pictures show larger fin hampered spins fm size plans gives ample directional stabil ity akspeeds up tip walk experienced increase aileron differ ential bottom ballast used larger groinmets can adjusted vertically wing hold-downs hold lead onto fuse lage bottom sure sheet lead weights cut folded maintain desired balance point FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY 120 Model Aviation ONLY $4995 Atom Back Approx Wi 175 oz Displacement 09 Cu Bore-5 Stroke 5 Piston Steel Crank CaseMagnesium Alloy inal Crankshaft Bearing Silicon Bronze Cylinder- Chromally Steel Approx RPM -12000 Grey Cox 7 x 4 prop FOBLsAngebs cA cA residents add 6% Sales Tax Order Direct ATOM smallest Ignition engines ever produced Designed R Arden further developments John Morrill Simplex Engines Limited Production Run Delivery 10 12 weeks ARO will receive within 7 days order con firming postcard verify receipt order give assigned engine number ap proximate delivery date Morrill-ADC PO Box 1210 Simi Valley CA 93062
Edition: Model Aviation - 1986/03
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 117, 120
NO OCR TEXT NO OCR TEXT fuselage incorporates special nose construction essentially simple plywood box balsa added permit shaping oval cross section Solid balsa tall surfaces simplify construction airfoils sanded symmetrical sections offer desired low drag THIS 5-FT SLOPE SOARER can easily quickly built can tear across sky high-speed runs can perform aerobatic maneuvers two-channel controls Inside out side loops spins extended inverted flight horizontal vertical rolls inside outside tight vertical turns blistering dives abrupt pullouts high-speed passes kinds showy flight duck soup design distinctive racy appearance rugged highly functional especially clean single nut bolt screw dowel rubberband horn pushrod hangs out ailerons can gapless Swingee fittings used ailerons linkage internal servo tucked flat wing cavity hooked directly Swingees Ailerons hooked up operate differentially Turn ing response ailerons alone no rudder excellent especially tight upelevator given after banking model pushrod flying stab entirely internal passing through fin bellcrank crisp action reliable neutral wing cleanly attached via internal hold-downs Only two little bolt heads visible bottom However 5-ft span assembled model makes small package easily transported slope site ready-to-fly condition An all-up weight 26 oz results wing loading about 8 ozIsq ft pound sheet lead can added internally increase loading higher winds style flying like Buzzbat will saunter around peace fully light wind flying gets interesting lift strong enough downstick pressure used some real speed point youd best blink make diving pass may wonder went ConstructIon Youll need following materials Wood medium-density balsa unless otherwise specified 2 x 3 x 36 ribs Four 6 x spruce spars Two 36 sub-leading edge Two 36 leading edge Two 1 x 36 beveled 1/16 x ling edge stock TE ailerons 3 x hard balsa sparwebbingfrom center Rl wing tip undersides x 36 hatch underbelly 3 x soft fin decking top wing tips 3 x /16 x 36 hard spar webbing Rl R9 interior wing saddle x 36 fuselage doublers x 36 light C-grain stab Four triangular stock joining fuselage sides formers wing ribs dihedral braces misc Four 3 x 1/16 x 36 wing sheeting cap strips ard running antenna down fuselage Spruce x o mounting Birch ply 3/, ers nose center core 24 Model Aviation Hatch merges cleanly ins wing Tairing LomDnuu WEIn IlK um nuD ails provides good wind penetration Contour-type paint scheme adds aireauraleek appearance Birch ply 1/16 x 12 x 48 slab sides bottom braces part bottom sheeting misc Birch /32 ply inlays fin Birch . ply sub-decking aft rear former Music wire 1/16 support Aluminum tubing 1/16 ID stab Two 055 1/i. x 36 music wire aileron stab pushrods Four metal devises Six 2-56 threaded couplers pushrod ends Two Swingees smaller white Delrin type available -in *4 sheet metal screws attach front hold-down 4-40 blind nut attach rear hold-down Two aileron hinges one-piece types fine Three -in 4-40 bolts round heads Tap size 4-40 4-40 self-tapping screw Two Du-Bro A6-in threaded ball links/sockets Aluminum strip Yio x wing hold-downs preferably tempered aircraft aluminum Thin sheet metal tin can etc aileron servo bracket Nylon 1A6-in sheet Sig stab bellcrank Vinyl seating tape 1/16 x saddle Brass 016 sheet making U around Swingee arms Lead 1/16-in sheet ballasting optionai Fuselage Make matched pair 1/ p1y sides As shown up 500 mAhuncased square battery pack wrapped -in latex foam bottom sides can accommodated 450 niAh pack con figured plans will also fit Use root pattern mark wing saddle contour incidence shown front hold-down bent plans space left accept large elevator servo aft former servo plan use can go forward plans show bend hold-down fcot forward notching sides front crosspiece accord ingly front former should just wide enough accept elevator servo cross wise mounting ears 4-in rails Make formers glue side fuselage other inverting assembly gcod alignment Cut attach interior saddle pieces Cut -in ply center core nose noting fits Via-in below top sides Make matched pair spacers fit against sides join front end Glue spacers core trim screw head clearance Cut ply bottom mark centerline Cut 42 birch ply hold-down crosspieces width fuselage bot tom servo used small enough go forward former cut rectangle snugly accept sideways Depending other space needs setup may placed forward battery-toreceiver adapter could also used eliminate bulky wiring harness Add triangular stock TS inside edges fuselage except hatch aft fin front Join nose core/spacer assembly sides Glue bottom crosspieces compart ment divider optional Fin Cut out shape noting goes bottom sides Make bellcrank standard 500 mAh battery pack fits nose Battery-to-receiver adapter cable usea instead bulky switch harness Hatch slides off keys accurately fuselage Wing attaches two Alien-head bolts shown nere Dritz posts sewing Item recess bolt heads provide seats protecting bottom fuselage Swingee-operated ailerons eliminate external hardware Authn says youve never tried youve mimeed * tewlf dmvi Tavi dtaii tII wn Wing trailing edge ailerons included made standard beveled stock forsimplification keep parts fabrication minimum Sig nylon Use #40 bit %2-in wireanda#51 or#S2fortheclevisforno sloppiness binding Make belicrank cutout Trim away 1/32 around bellcrank fin bottom out about inlays go easiest accomplish before balsa sections glued together using inlays marking Add 1/16 ply doublers inlays main support wire Glue inlay Position other Yi6-in shim between make keying marks drill %2-in hole sewing thread spool hole shimmed down decreasing diameter pieces tubing makes good drilling guide Place bellcrank outsides drill series holes arc front stab connecting wire smooth out rough spots Mark path pushrod through fin align servo output arm common carpenters saw can used cut pushrod slot fin bottom pushrod can made 055 1/its-in wire threaded couplers ends threaded rods inserted Y16-in dowel Assemble pushrod lay fin slot Fill underneath balsa Run Yn-in support wire through Glue other inlay rechecking alignment free movement Use Zap cyanoacrylate CyA glue wire inlays Glue Cm fuselage side flush bottom trim TS front fin Clamp fin between sides eyeball shift fin needed eliminate built-in turning tendency ignore leaning Zap 1-in length 1/ cross-grained ply subdecking top just forward Cm secure positioning Glue fin other side let 26 Model Aviation Flying stab pivots rigid support actuated pushrod/bellcrank arrangement assures well-defined neutral Pivot location stab design avoid high-speed fiutter Fin sandwiches between tue ena Olin ply sides s slim extremely strong rear Stab roots fit cieaniy fiat sides ofthefin BUZ ZBAT 2 CHANNEL SLOPE SOARER DESIGNED BY HARLEY MICHAELIS /4 BALSA C NIRA BALSA FIN~CN 3/32 BALSA /64 PLY-DOUBLER 1/32 PLY BALSA OVER 1/16 PLY KEYHOLE PLATE /8 PLY CORE 3/16BALSA WEB 1/16 PLY BOTTOM 1/16 x /4I/B SUB L E SPRUCE SPARS 26 PLY WING BRACES BALSA N N - SWINGEE 1/16 WIRE BALSA TE STOCK ONE PIECE N CAP STRIPS N NN 1/16 BALSA SHEETING TOP BOTTOM N N N- N I/4x3/8 LE glue dry fin leans hold fuselage between knees twist 1-in sections /64 ply subdecking progres sively glued CyA Its good idea protect fingers backing iron-on covering CyA fires Install elevator servo complete pushrod rear former install crosspieces etc guide route pushrod clear hold-downs Finish Y64 ply subdecking sand corners make square box Add hard balsa pine nose core front underbelly Add sheet stock ply box structure shaping fuselage using lighter balsa rear Cut hatch block profile sides fuselage Glue Ys4 ply bottom edges hatch hold-down screw goes Fit dovetailed /s ply plate atop spacer blocks between sides hatch block position drill through mounting plate estab lish common centerline screw rear keyhole slot Set adjust screw hatch punch pinholes balsa around thoroughly reinforce area thin CyA glue Make keyhole slot plate glue place Add keying plate hatch rear underside Sand down ply box corners except along saddle edges Merge /16 ply along hatch area simultaneously shaping hatch razor plane flat Permagrit tool excellent aid forming nice oval cross sections Cut glue fm extension slightly above line stab Work fin generally symmetrical airfoil keep flat stab butts Stab Cut -in balsa preferably light medium C-grain stock Lay against fin correct position mark 3Az-in ID tubes go Cut snug slots press tubes Slip halves make snug slots /16-in ID tubing Shift stab halves slots until same plane aligned well wing saddle Use tiny drop CyA secure tubes position Remove add CyA fill around tubes epoxy putty etc Shape nice symmetrical airfoil thinning toward tips Reinforce I/IS BALSA SHEETING B BALSA B PLY WINGCAP STRIPS ARE NOT SHOWN TIP-DEE CROSS SECTON THIS PANEL FOR CLARITY AT RIGHT TIP 3/32 BALSA RIBS I- II/IBI/4WINGPLANTOPVI SPRUCE SRS I-7R-6P-SR-4R-3P-S I__ AILERON HINGE / //4 50 BALSA YE STOCK SWINGEE BALSA BIB NOTE MAKE PLY RIBO& ROOT AIRFOIL 9 10 STACK CUT 3/32 BALSA SPARTRIM 2 P0~REAR WING FAIRINGRIBS-REARDOUBLERr PLY FACE ROOTR-9R-O BALSA SHEETSADDLE /4 1/6 PLYEDGE BALSATRI STOCK I/IS PLY PLANKSI/ISB" PLYI/BI/B BALSA IBALSAFUSELADE3/IS BA IA-AI/S ~M SHAPE~SHEET _____B-B WING FAIRING DETAILPLY ________BALSA DETAILSEATING 1/16 PLY KEYHOLESPACER1/4 BALSAFORMERL15WING TAPE SOLID BALSAFLATBLOCKYRI-STOCIBPOF CHEEKSA TRECEIVER ABA AREA /8 BALSA SIDES TAPER DOWN TO REAP SLAB SIDE A-/ S/ BALSA WING 3/35 PLY SADDLE FUSELAGE FORMERS 1p-I-S/B _______ 3/35 PLY FORMERS 7-I/S 7-3/4~I/8LONuOC1-3/4FUSELAGE SIDEI-3/4 H/S --- 7 3/B OFF IIS-S/BPLY FAIRING4-40 BL SOLIDORENUTFORM BA I/B PLY____ _ - zmTF AREA 7JECES/ERTh bX__ SOLI BALSA SEERAIL HARD BALSA ORCROSS SECTIONS A-B-C OPTIONAL PINE CHEEKS1/4 TRI STOCKI/IS PLY BOTTOM harden thin edges application ofoutput pushrod clears holdthin CyAdowns Adjust stab 0-0 neutral Position stab servo adjust theis line bottom fuselage 1/83/B ALUM 4-40 TAP 1/4 BALSA TRI -STOCK SAND TO PLY HERE SPACER BLOCKSLAB SIDE--450 MIL I/B PLYPAK COREKkA-lJ HARD---BATT PAK BALSA CHEEK DETAIL NOSEBALSA Left shot interior saddle pieces already 1/16 ply sides joined farmers Ply nose core/spacer glued onto front end Right Bottom croaspieces 1/16 ply glued sides triangle stock added reinforcing hatch keying plate has already glued place Elevator servo recessed fuselage bottom will attached mounting rails 28 Model Aviation 80 Full-Size Plans Available. See Page 164 XJBLERS TO1/16 BALSA SHEETING1/4 3/8 BALSA1/32 PLY CORE B LICE SHEETS-.--TOP 16 BOTTOM-BUTTLEADING EDGEI/B BALSABALSA BLOCK WING nc m nonoSUB L ETIPS I--808-0 RO I6PLYIS~VOSPRUCE 50CK5 1/16 ANG RACESI/4WEBS TO 16 d/4PLYSLOTAS THICK AS THEN 3/16 TO /16BALSA SPRUCE SWINGEE 4 WING TI OSHSTRIPS LSA WEB SPARS NOTE GRAIN BRASS U 1/4 50 BALSA NDI/I6II-IR- /83--4R-S I/I6I/2R7SPAR RB8-I ENTER-~ S OR I/lB ALSA WIRE NOTCH - _ SWINGEE 1/16 PLY ON BOTTOMSIND NUT E S100 PLY DETAIL 4 PLY~ B DEcK C-C CCW ON RIGHT AlL SERVO LOW WIREBALSA T E STOCK REVERSE FOR CWI ONE PIECE OPTIONAL 1/64 PLY GAP COVER SEE TEXT 1/16 PLY WING BRACES NO DIHEDRAL _____/ /16 PLY_______________[11 IDES___________________________________II Ii 25 FINFILL SLOT LBOERr2WINGBRACESjJ PUSHRcIO WIRE/16 PLY BOTTOM 3/32 PLY WITH BALSAIdSTAB CROSSFORMS EXTERIOR SS PIECES SEC ONCONTOUR REARI/B BALSA DETAILC GRAIN /4/ALUMINUM1/64 TUBES ________1/4 BALSA FIN EXTERSION FIN FRONT 1/16 PLY ~JBLER 1/32 PLY FIN DOUBLER I/4\l ThI STOCK BETWEEN SLAB SIDES 3/ 2 1/16 LLASTNG OPTIONS1/16SHEET LEAD 9APPROX 40Z 0 EACH DEIJBLE LAY BETWEEN NOLD DOWNS NOTE 5157 YEFFECTU/4 BALSA C RADIO SIGNAL- RUN ANTENNA HIGHIIIGRAJN IN FUSELAGEIf4I III&BALSA T 1/4 BALSA FINFIL ERFill EXT CONTOURII1/32 PLY INLAY C-CEXTENSIONI 1/16 PLY DOUBLER / jI rqj ii-1/16 NYLON SOLID BALSAIII 111/16 SEE X-SECT BALSA 1/8 BALSA OVER 1/16 PLY SIDES MW PUSHROD SLOT FOR PUSH ROD THIN CLEVIS BALSA 0I23456 FUSELAGE BOTTOM TO FIT ELEV SERVO CASE PLY KEY HATCH IL RAILS ON RIBS BRACKET TO SECURE SERVO WINGDETAIL MODEL AVIATION BUZZBAT 2 CHANNEL SLOPE SOARER SPAN 60 LENGTH 39 AREA 4S0 SQIN DESIGNED BY HARLEY MICHAELIS AMA 32343 [SF ~ ACING BY 70E DEMARcO March 1986 29 ALL RIGHTS RESERVED Left cutout made f stab belicrank slotted underneath accommodate pushrod 3/32-in stab wire rigidlysupported inthe ply inlays/doublers shimmed Spool servesasa drill guide Right Thefin isgiuded totheslab sides 1/64 ply subdecking added top bottom form ply box rugged very light enclosed hardware greatly reduces drag Left Balsa planks blocks added ply fuselage box keyed hatch installed can shaped along rest fuselage Right Balsa sheeting worked razor plane sanding block oval cross sections ply box corners Keep working until nice sculptured shape achieved Model Magic Filler used author fix gaps dings make fillets Left 1/4-in vertical webs plywood braces blind nut have installed Servo railswlll capped balsa centerthe out put wheel vertically cavity Installing 3/16-In webbing out tips next Right Simple wing construction cuts buildIng time Wing flat Permagrit sanding tool especially useful forming rib templates /32 balsa ribs Make RO R9 templates 6 ply Use cut four RO ribs two R9 ribs Clamp eight rectangles balsa between RO R9 templates stack-shape Ri through R8 Reverse templates repeat pro cedure ribs other wing half Level rib tops andtrim /i-in off top edges innermost ROs forward wing brace Cut 6 x ce spars bottom sheeting Note sheeting extends forward -in-thick sub-leading edge Butt-glue spars sheeting except vertical front wing brace goes Trim /16-in sheeting allow brace Pin sheeting ribs work surface make line ball-point pen represent rear sub-leading edge Shape fit solid trailing edge TE stock extend out R5 rib stations Note underside trimmed outermost ROs inlaid /16 ply plate mini micro servo output wheel offset holes needed ailerons Space inboard RO ribs fit servo -in rails Cut -in-deep notches TE ends RO R4 Trim ribs accord ingly Pin TE place 46-in shim strip under RO-R4 ribs Zap TE front aileron line pin down 6in strip fairly hard balsa -in balsa spar strip hinging will later added rear half now glue ribs R5 out piece Cut deep notches spar strip ribs Bevel spar strip match airfoil glue Swingees should handpicked ones move freely have minimum slop piness arm other parts held flat install glue wide strip /16 ply use /32 ply thicker Swingee onto -in balsa aile ron mounting strip aligning against spar front between ribs Swingee will lay Use #11 blade ply cut slot bottom use Swingee guide cut top sides snug fit Cut pair spruce blocks -in long -in strip Trim match Swingee thickness Insert Swingee glue blocks ply form front portion slot sides Remove Swingee Cap strip Of/16 ply complete slot Drill /i6in holes through center ply Swingee hinge line close struc ture drop CyA holes secure taking care avoid bonding moving parts Shim /6-in drill bit drill slot 30 Model Aviation Left Ribs 1-Bare shaped Permagritfile balsa rectangies clamped between plywood templates RO R9 Spruce spars butt-join sheeting eilminating rib notches Above Wing builds flatno dihedral Ribs notched stock-size beveied trail Ing edge also used ailerons Ribs flrsttacked spar CyA one glued sheeting CyA Left An aluminum bracket secures servo rails 1/16-in ball links offset output holes provide aileron differential Right brass strip around Swingee arm receives metal clevis Swingee blocked lnwith spruce ply glued CyA Left OptIonal 1/64 ply coversthe alieron gap thlsvlew underside slit rubbercement bead added cementcures acts hinge slit cracked Right Wing fairing has ply core balsa planking Hatch slides beneath streamlining Len I apered aluminum hold-downa secured wing part secret about wing held two visible screw heads Right author launches Buzzbat another flight Low drag makes ship good performer light winds aileron arm straight forward aileron neutral Use 1/64 ply shim up slot necessary Most type hinge Radio South etc good other locations -in-wide brass strip crimp Ufittings around Swingee arm threads Trim smooth matched pair Out 344 U-fitting make hole clevis pin sized neither bind sioppy Place close possible arms maximum deflection Use metal clevis keeper instead nylon type Aileron trimming will made rotation entire pushrod ball socket end Zap-glue ribs atime spar sheeting maintaining pressure against rib bottoms Check rib fronts tops straightedge sand down build up necessary achieve uniformity Put 1/16 balsa doubler front center bottom sheeting splice wing halves together Add 1/16 sheeting over tops RO ribs splice top center sheeting Cut add vertical webbing sub-leading edge Cut 1/16 ply braces go wing bottom under top sheeting Trim Y16-in ribs forward webbing glue brace flush work surface Rejoin sectioned ribs TS bracing Add block through sheeting attach front hold-down screw block must sufficient size/strength screw get good bite supports models weight G-forces Add top spar sheeting rear brace Add shape leading edge Fit glue 1/34 ply plate rear aluminum hold-down fastens Drill Continued page 117 March 1986 31 Letters Editor Continued page 12 authorized report Bills demise George L Eaton AKA CS Verral now holds copyrights Bills future Bill Barnes killed automobile ac cident No way next thing know will try tell Glenn Miller killed plane crash Bill Barnes lives Bud Overn Santa Ana CA Great men like Barnes legends Bill seen gas station Elcino Lake Charles Nats Safeway super market North Platte Truth must faced fateful day 1952 great pilot foolishly ventured out red Volks wagen van near-hurricane conditions demise covered up CIA due planned highly-sensitive mission Near East could have brought lasting peace region New York Times reluctantly deleted obit Since Frank Tinsley retired happy mayor New England town friends hid news sad event would have broken heart Yes party New York town house reported pa pers Bud Ovem may aware Barnes identical twin perhaps thwarted Japanese Aleu tians Until secret file Pentagon declassffied lips sealed Shorty Sandy party might see things after happy consump tion colorless odorless liquid olives toothpicks butler whispered man New Yorker old times sake Russian-like liquid actually Barnes secret engine coolant drained through loaves white bread Pepperidge family size stood end remove toxic agent Perhaps will news Bud real Sandy always wore green silk shirt first three buttons open reveal tatoo Stormer Sandy wore polka-dot tie nightdoesnt square Having visited soft-spoken FBI type still-secret file can say no EditorPublisher Wheeley has firmly advised same operator publish another word about Barnes case closed Since personally edited Chuck Ver rals copy George L Eaton will sign affidavit Chuck shared chore alternate-month basis Harold Mon tanye Bud Overn Chuck others will remiss Monty forgotten pal Bill playing tennis Gosh Chuck cant tell brothers apart Bill Winter Fairfax VA Buzzbat Continued page 31 hole 4-40 blind nut near plate front dead center wing Make rear hold-down bends somewhat rounded available use tempered aircraft-type aluminum Center punch bent ends out about Y16 drill %2-in holes Tap 4-40 threads Temporarily attach hold-down set wing position saddle Mark hole fuselage bottom drilled Repeat front hold-down foot bent forward accommodate servo locate front hole making template scrap balsa match hold-down hole spacing Lay template fuselage bottom mark Drill holes fuselage resting firmly block making final installation hold-downs glue notched ply plates wing around cant rotate Extend bottom sheeting toward aileron servo minimize open area enclosed fuselage Cut x 1in piece -in birch ply glue centered inside extend over ply plate adjacent bottom sheeting Drill through 4-40 blind nut Attach -in balsa vertical crosspiece aft servo Add TS places ply plate other bottom sheeting meets other Continued page 120 March1986 117 K responding advertisers mention read about Model Aviation DALLAIRE SPORTSTER SPECIFICATIONS Wing Span 72 Inches Wing Chord 11 Inches Power 21-30 Engine Radio 3 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware %$OLD TIMER Rt 1 Box 190 a MS 38754 Telephone 601 2473578 Buzzbat Continued page 117 structural members common damage bad landing piy plates breaking away Add remaining top center sheeting cap strips ex treme tips ply facing wing faking can shaped tack-glued hatch rear broken away glued leading edge wing mounted remainder faking fitted Magic Model Filler can smooth everything out Temporarily add 6-in seating tape adding facingto get good merge between hatch fairing Aileron servo installation Rails glued inside inboard RO ribs po sitioned center servo output wheel vertically cavity metal bracket screws over servo case under side cutout sheeting over servo wheel gives /1-in space Butt servo bottom against rear brace flopped cable best clears front hold-down Aileron differential up down provided placing Yie-in ball links offset holes output wheel Try 450 get least twice much up down avoid adverse yaw Use hole radius least /16 get enough aileron movement Servo-to Swingee linkup plans show applies small white Swingee control wire will run high low ball links side wheel builder dark opposing Swingees used both ball links can top bottom wheel preferably bottom easier access Study servo rotation corresponding Swingee action planes rear radio observe whats happening As turns linear movement up-aileron must greater Tape ailerons neutral Mark cut paths holes pushrod wires through ribs Use coupler suf ficient threads adjustments solder coupler wire aileron end Put metal clevis centered threads use keeper radio output wheel neutral sockets couplers mark wires cut servo end go deep couplers Cut epoxy wires couplers avoid bonding Swingee parts secure rear portions CyA dropped through small holes made balsa Optional aileron gap covers An idea better gap covers referred plans came after plans inked After covered allerons installed cut -in-wide strip thin rigid plastic 3 mil clear drafting Mylar excellent attach -in-wide double-sticky clear Scotch tape can external under covering wing low heat used Static electricity requires clean environ ment following steps First tape -in strip cutto length work sufface bits black tape placed edge stretch care fully lower position length doublesticky tape accurately other long edge some excess both ends Remove black tape Holding excess ends carefully position over gap slowly lower position Trim excess Finishing various tex coverings bear up better fuselage unrein forced films single 8-in-wide piece can fuselage Make overlaps forward fm around nose Alter fuselage covered protect raw edges around bolt holes large washer eyelet bushing broad flange #5 Dritz Mighty Snaps packet size 24 sewing outlets contains posts well-suited application Put -in dense latex foam Ace Sig etc around three sides fronts battery receiver hatch underside can hollowed out necessary Run antenna down fuselage -in balsa stick typical switch harness nuis ance install since full charge should give three four hours operation battery-to-receiver adapter practical alternative Balance trim saddle cut conform plans wing has 10 incidence Balanced out stab 0-0 little tendency bailcon ship must flown out its heading Use 450 500 mAh pack Vie-in sheet lead squares forward battery balancing necessary Balancing point shown plans enough stab throw will permit gcod spins may fly too squirrely first low-time pilots youre experi enced pilot balance model begin spar trim elevator level flight Keep stab throw front about Ye way initially ship touchy pitch axis After familiarity may want increase throw obtain true spins tighter turns etc Use dual rate setting trans mitter available Tight spins possible adequate stab movement center gravity CG too far ward Some pictures show larger fin hampered spins fm size plans gives ample directional stabil ity akspeeds up tip walk experienced increase aileron differ ential bottom ballast used larger groinmets can adjusted vertically wing hold-downs hold lead onto fuse lage bottom sure sheet lead weights cut folded maintain desired balance point FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY 120 Model Aviation ONLY $4995 Atom Back Approx Wi 175 oz Displacement 09 Cu Bore-5 Stroke 5 Piston Steel Crank CaseMagnesium Alloy inal Crankshaft Bearing Silicon Bronze Cylinder- Chromally Steel Approx RPM -12000 Grey Cox 7 x 4 prop FOBLsAngebs cA cA residents add 6% Sales Tax Order Direct ATOM smallest Ignition engines ever produced Designed R Arden further developments John Morrill Simplex Engines Limited Production Run Delivery 10 12 weeks ARO will receive within 7 days order con firming postcard verify receipt order give assigned engine number ap proximate delivery date Morrill-ADC PO Box 1210 Simi Valley CA 93062
Edition: Model Aviation - 1986/03
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 117, 120
NO OCR TEXT NO OCR TEXT fuselage incorporates special nose construction essentially simple plywood box balsa added permit shaping oval cross section Solid balsa tall surfaces simplify construction airfoils sanded symmetrical sections offer desired low drag THIS 5-FT SLOPE SOARER can easily quickly built can tear across sky high-speed runs can perform aerobatic maneuvers two-channel controls Inside out side loops spins extended inverted flight horizontal vertical rolls inside outside tight vertical turns blistering dives abrupt pullouts high-speed passes kinds showy flight duck soup design distinctive racy appearance rugged highly functional especially clean single nut bolt screw dowel rubberband horn pushrod hangs out ailerons can gapless Swingee fittings used ailerons linkage internal servo tucked flat wing cavity hooked directly Swingees Ailerons hooked up operate differentially Turn ing response ailerons alone no rudder excellent especially tight upelevator given after banking model pushrod flying stab entirely internal passing through fin bellcrank crisp action reliable neutral wing cleanly attached via internal hold-downs Only two little bolt heads visible bottom However 5-ft span assembled model makes small package easily transported slope site ready-to-fly condition An all-up weight 26 oz results wing loading about 8 ozIsq ft pound sheet lead can added internally increase loading higher winds style flying like Buzzbat will saunter around peace fully light wind flying gets interesting lift strong enough downstick pressure used some real speed point youd best blink make diving pass may wonder went ConstructIon Youll need following materials Wood medium-density balsa unless otherwise specified 2 x 3 x 36 ribs Four 6 x spruce spars Two 36 sub-leading edge Two 36 leading edge Two 1 x 36 beveled 1/16 x ling edge stock TE ailerons 3 x hard balsa sparwebbingfrom center Rl wing tip undersides x 36 hatch underbelly 3 x soft fin decking top wing tips 3 x /16 x 36 hard spar webbing Rl R9 interior wing saddle x 36 fuselage doublers x 36 light C-grain stab Four triangular stock joining fuselage sides formers wing ribs dihedral braces misc Four 3 x 1/16 x 36 wing sheeting cap strips ard running antenna down fuselage Spruce x o mounting Birch ply 3/, ers nose center core 24 Model Aviation Hatch merges cleanly ins wing Tairing LomDnuu WEIn IlK um nuD ails provides good wind penetration Contour-type paint scheme adds aireauraleek appearance Birch ply 1/16 x 12 x 48 slab sides bottom braces part bottom sheeting misc Birch /32 ply inlays fin Birch . ply sub-decking aft rear former Music wire 1/16 support Aluminum tubing 1/16 ID stab Two 055 1/i. x 36 music wire aileron stab pushrods Four metal devises Six 2-56 threaded couplers pushrod ends Two Swingees smaller white Delrin type available -in *4 sheet metal screws attach front hold-down 4-40 blind nut attach rear hold-down Two aileron hinges one-piece types fine Three -in 4-40 bolts round heads Tap size 4-40 4-40 self-tapping screw Two Du-Bro A6-in threaded ball links/sockets Aluminum strip Yio x wing hold-downs preferably tempered aircraft aluminum Thin sheet metal tin can etc aileron servo bracket Nylon 1A6-in sheet Sig stab bellcrank Vinyl seating tape 1/16 x saddle Brass 016 sheet making U around Swingee arms Lead 1/16-in sheet ballasting optionai Fuselage Make matched pair 1/ p1y sides As shown up 500 mAhuncased square battery pack wrapped -in latex foam bottom sides can accommodated 450 niAh pack con figured plans will also fit Use root pattern mark wing saddle contour incidence shown front hold-down bent plans space left accept large elevator servo aft former servo plan use can go forward plans show bend hold-down fcot forward notching sides front crosspiece accord ingly front former should just wide enough accept elevator servo cross wise mounting ears 4-in rails Make formers glue side fuselage other inverting assembly gcod alignment Cut attach interior saddle pieces Cut -in ply center core nose noting fits Via-in below top sides Make matched pair spacers fit against sides join front end Glue spacers core trim screw head clearance Cut ply bottom mark centerline Cut 42 birch ply hold-down crosspieces width fuselage bot tom servo used small enough go forward former cut rectangle snugly accept sideways Depending other space needs setup may placed forward battery-toreceiver adapter could also used eliminate bulky wiring harness Add triangular stock TS inside edges fuselage except hatch aft fin front Join nose core/spacer assembly sides Glue bottom crosspieces compart ment divider optional Fin Cut out shape noting goes bottom sides Make bellcrank standard 500 mAh battery pack fits nose Battery-to-receiver adapter cable usea instead bulky switch harness Hatch slides off keys accurately fuselage Wing attaches two Alien-head bolts shown nere Dritz posts sewing Item recess bolt heads provide seats protecting bottom fuselage Swingee-operated ailerons eliminate external hardware Authn says youve never tried youve mimeed * tewlf dmvi Tavi dtaii tII wn Wing trailing edge ailerons included made standard beveled stock forsimplification keep parts fabrication minimum Sig nylon Use #40 bit %2-in wireanda#51 or#S2fortheclevisforno sloppiness binding Make belicrank cutout Trim away 1/32 around bellcrank fin bottom out about inlays go easiest accomplish before balsa sections glued together using inlays marking Add 1/16 ply doublers inlays main support wire Glue inlay Position other Yi6-in shim between make keying marks drill %2-in hole sewing thread spool hole shimmed down decreasing diameter pieces tubing makes good drilling guide Place bellcrank outsides drill series holes arc front stab connecting wire smooth out rough spots Mark path pushrod through fin align servo output arm common carpenters saw can used cut pushrod slot fin bottom pushrod can made 055 1/its-in wire threaded couplers ends threaded rods inserted Y16-in dowel Assemble pushrod lay fin slot Fill underneath balsa Run Yn-in support wire through Glue other inlay rechecking alignment free movement Use Zap cyanoacrylate CyA glue wire inlays Glue Cm fuselage side flush bottom trim TS front fin Clamp fin between sides eyeball shift fin needed eliminate built-in turning tendency ignore leaning Zap 1-in length 1/ cross-grained ply subdecking top just forward Cm secure positioning Glue fin other side let 26 Model Aviation Flying stab pivots rigid support actuated pushrod/bellcrank arrangement assures well-defined neutral Pivot location stab design avoid high-speed fiutter Fin sandwiches between tue ena Olin ply sides s slim extremely strong rear Stab roots fit cieaniy fiat sides ofthefin BUZ ZBAT 2 CHANNEL SLOPE SOARER DESIGNED BY HARLEY MICHAELIS /4 BALSA C NIRA BALSA FIN~CN 3/32 BALSA /64 PLY-DOUBLER 1/32 PLY BALSA OVER 1/16 PLY KEYHOLE PLATE /8 PLY CORE 3/16BALSA WEB 1/16 PLY BOTTOM 1/16 x /4I/B SUB L E SPRUCE SPARS 26 PLY WING BRACES BALSA N N - SWINGEE 1/16 WIRE BALSA TE STOCK ONE PIECE N CAP STRIPS N NN 1/16 BALSA SHEETING TOP BOTTOM N N N- N I/4x3/8 LE glue dry fin leans hold fuselage between knees twist 1-in sections /64 ply subdecking progres sively glued CyA Its good idea protect fingers backing iron-on covering CyA fires Install elevator servo complete pushrod rear former install crosspieces etc guide route pushrod clear hold-downs Finish Y64 ply subdecking sand corners make square box Add hard balsa pine nose core front underbelly Add sheet stock ply box structure shaping fuselage using lighter balsa rear Cut hatch block profile sides fuselage Glue Ys4 ply bottom edges hatch hold-down screw goes Fit dovetailed /s ply plate atop spacer blocks between sides hatch block position drill through mounting plate estab lish common centerline screw rear keyhole slot Set adjust screw hatch punch pinholes balsa around thoroughly reinforce area thin CyA glue Make keyhole slot plate glue place Add keying plate hatch rear underside Sand down ply box corners except along saddle edges Merge /16 ply along hatch area simultaneously shaping hatch razor plane flat Permagrit tool excellent aid forming nice oval cross sections Cut glue fm extension slightly above line stab Work fin generally symmetrical airfoil keep flat stab butts Stab Cut -in balsa preferably light medium C-grain stock Lay against fin correct position mark 3Az-in ID tubes go Cut snug slots press tubes Slip halves make snug slots /16-in ID tubing Shift stab halves slots until same plane aligned well wing saddle Use tiny drop CyA secure tubes position Remove add CyA fill around tubes epoxy putty etc Shape nice symmetrical airfoil thinning toward tips Reinforce I/IS BALSA SHEETING B BALSA B PLY WINGCAP STRIPS ARE NOT SHOWN TIP-DEE CROSS SECTON THIS PANEL FOR CLARITY AT RIGHT TIP 3/32 BALSA RIBS I- II/IBI/4WINGPLANTOPVI SPRUCE SRS I-7R-6P-SR-4R-3P-S I__ AILERON HINGE / //4 50 BALSA YE STOCK SWINGEE BALSA BIB NOTE MAKE PLY RIBO& ROOT AIRFOIL 9 10 STACK CUT 3/32 BALSA SPARTRIM 2 P0~REAR WING FAIRINGRIBS-REARDOUBLERr PLY FACE ROOTR-9R-O BALSA SHEETSADDLE /4 1/6 PLYEDGE BALSATRI STOCK I/IS PLY PLANKSI/ISB" PLYI/BI/B BALSA IBALSAFUSELADE3/IS BA IA-AI/S ~M SHAPE~SHEET _____B-B WING FAIRING DETAILPLY ________BALSA DETAILSEATING 1/16 PLY KEYHOLESPACER1/4 BALSAFORMERL15WING TAPE SOLID BALSAFLATBLOCKYRI-STOCIBPOF CHEEKSA TRECEIVER ABA AREA /8 BALSA SIDES TAPER DOWN TO REAP SLAB SIDE A-/ S/ BALSA WING 3/35 PLY SADDLE FUSELAGE FORMERS 1p-I-S/B _______ 3/35 PLY FORMERS 7-I/S 7-3/4~I/8LONuOC1-3/4FUSELAGE SIDEI-3/4 H/S --- 7 3/B OFF IIS-S/BPLY FAIRING4-40 BL SOLIDORENUTFORM BA I/B PLY____ _ - zmTF AREA 7JECES/ERTh bX__ SOLI BALSA SEERAIL HARD BALSA ORCROSS SECTIONS A-B-C OPTIONAL PINE CHEEKS1/4 TRI STOCKI/IS PLY BOTTOM harden thin edges application ofoutput pushrod clears holdthin CyAdowns Adjust stab 0-0 neutral Position stab servo adjust theis line bottom fuselage 1/83/B ALUM 4-40 TAP 1/4 BALSA TRI -STOCK SAND TO PLY HERE SPACER BLOCKSLAB SIDE--450 MIL I/B PLYPAK COREKkA-lJ HARD---BATT PAK BALSA CHEEK DETAIL NOSEBALSA Left shot interior saddle pieces already 1/16 ply sides joined farmers Ply nose core/spacer glued onto front end Right Bottom croaspieces 1/16 ply glued sides triangle stock added reinforcing hatch keying plate has already glued place Elevator servo recessed fuselage bottom will attached mounting rails 28 Model Aviation 80 Full-Size Plans Available. See Page 164 XJBLERS TO1/16 BALSA SHEETING1/4 3/8 BALSA1/32 PLY CORE B LICE SHEETS-.--TOP 16 BOTTOM-BUTTLEADING EDGEI/B BALSABALSA BLOCK WING nc m nonoSUB L ETIPS I--808-0 RO I6PLYIS~VOSPRUCE 50CK5 1/16 ANG RACESI/4WEBS TO 16 d/4PLYSLOTAS THICK AS THEN 3/16 TO /16BALSA SPRUCE SWINGEE 4 WING TI OSHSTRIPS LSA WEB SPARS NOTE GRAIN BRASS U 1/4 50 BALSA NDI/I6II-IR- /83--4R-S I/I6I/2R7SPAR RB8-I ENTER-~ S OR I/lB ALSA WIRE NOTCH - _ SWINGEE 1/16 PLY ON BOTTOMSIND NUT E S100 PLY DETAIL 4 PLY~ B DEcK C-C CCW ON RIGHT AlL SERVO LOW WIREBALSA T E STOCK REVERSE FOR CWI ONE PIECE OPTIONAL 1/64 PLY GAP COVER SEE TEXT 1/16 PLY WING BRACES NO DIHEDRAL _____/ /16 PLY_______________[11 IDES___________________________________II Ii 25 FINFILL SLOT LBOERr2WINGBRACESjJ PUSHRcIO WIRE/16 PLY BOTTOM 3/32 PLY WITH BALSAIdSTAB CROSSFORMS EXTERIOR SS PIECES SEC ONCONTOUR REARI/B BALSA DETAILC GRAIN /4/ALUMINUM1/64 TUBES ________1/4 BALSA FIN EXTERSION FIN FRONT 1/16 PLY ~JBLER 1/32 PLY FIN DOUBLER I/4\l ThI STOCK BETWEEN SLAB SIDES 3/ 2 1/16 LLASTNG OPTIONS1/16SHEET LEAD 9APPROX 40Z 0 EACH DEIJBLE LAY BETWEEN NOLD DOWNS NOTE 5157 YEFFECTU/4 BALSA C RADIO SIGNAL- RUN ANTENNA HIGHIIIGRAJN IN FUSELAGEIf4I III&BALSA T 1/4 BALSA FINFIL ERFill EXT CONTOURII1/32 PLY INLAY C-CEXTENSIONI 1/16 PLY DOUBLER / jI rqj ii-1/16 NYLON SOLID BALSAIII 111/16 SEE X-SECT BALSA 1/8 BALSA OVER 1/16 PLY SIDES MW PUSHROD SLOT FOR PUSH ROD THIN CLEVIS BALSA 0I23456 FUSELAGE BOTTOM TO FIT ELEV SERVO CASE PLY KEY HATCH IL RAILS ON RIBS BRACKET TO SECURE SERVO WINGDETAIL MODEL AVIATION BUZZBAT 2 CHANNEL SLOPE SOARER SPAN 60 LENGTH 39 AREA 4S0 SQIN DESIGNED BY HARLEY MICHAELIS AMA 32343 [SF ~ ACING BY 70E DEMARcO March 1986 29 ALL RIGHTS RESERVED Left cutout made f stab belicrank slotted underneath accommodate pushrod 3/32-in stab wire rigidlysupported inthe ply inlays/doublers shimmed Spool servesasa drill guide Right Thefin isgiuded totheslab sides 1/64 ply subdecking added top bottom form ply box rugged very light enclosed hardware greatly reduces drag Left Balsa planks blocks added ply fuselage box keyed hatch installed can shaped along rest fuselage Right Balsa sheeting worked razor plane sanding block oval cross sections ply box corners Keep working until nice sculptured shape achieved Model Magic Filler used author fix gaps dings make fillets Left 1/4-in vertical webs plywood braces blind nut have installed Servo railswlll capped balsa centerthe out put wheel vertically cavity Installing 3/16-In webbing out tips next Right Simple wing construction cuts buildIng time Wing flat Permagrit sanding tool especially useful forming rib templates /32 balsa ribs Make RO R9 templates 6 ply Use cut four RO ribs two R9 ribs Clamp eight rectangles balsa between RO R9 templates stack-shape Ri through R8 Reverse templates repeat pro cedure ribs other wing half Level rib tops andtrim /i-in off top edges innermost ROs forward wing brace Cut 6 x ce spars bottom sheeting Note sheeting extends forward -in-thick sub-leading edge Butt-glue spars sheeting except vertical front wing brace goes Trim /16-in sheeting allow brace Pin sheeting ribs work surface make line ball-point pen represent rear sub-leading edge Shape fit solid trailing edge TE stock extend out R5 rib stations Note underside trimmed outermost ROs inlaid /16 ply plate mini micro servo output wheel offset holes needed ailerons Space inboard RO ribs fit servo -in rails Cut -in-deep notches TE ends RO R4 Trim ribs accord ingly Pin TE place 46-in shim strip under RO-R4 ribs Zap TE front aileron line pin down 6in strip fairly hard balsa -in balsa spar strip hinging will later added rear half now glue ribs R5 out piece Cut deep notches spar strip ribs Bevel spar strip match airfoil glue Swingees should handpicked ones move freely have minimum slop piness arm other parts held flat install glue wide strip /16 ply use /32 ply thicker Swingee onto -in balsa aile ron mounting strip aligning against spar front between ribs Swingee will lay Use #11 blade ply cut slot bottom use Swingee guide cut top sides snug fit Cut pair spruce blocks -in long -in strip Trim match Swingee thickness Insert Swingee glue blocks ply form front portion slot sides Remove Swingee Cap strip Of/16 ply complete slot Drill /i6in holes through center ply Swingee hinge line close struc ture drop CyA holes secure taking care avoid bonding moving parts Shim /6-in drill bit drill slot 30 Model Aviation Left Ribs 1-Bare shaped Permagritfile balsa rectangies clamped between plywood templates RO R9 Spruce spars butt-join sheeting eilminating rib notches Above Wing builds flatno dihedral Ribs notched stock-size beveied trail Ing edge also used ailerons Ribs flrsttacked spar CyA one glued sheeting CyA Left An aluminum bracket secures servo rails 1/16-in ball links offset output holes provide aileron differential Right brass strip around Swingee arm receives metal clevis Swingee blocked lnwith spruce ply glued CyA Left OptIonal 1/64 ply coversthe alieron gap thlsvlew underside slit rubbercement bead added cementcures acts hinge slit cracked Right Wing fairing has ply core balsa planking Hatch slides beneath streamlining Len I apered aluminum hold-downa secured wing part secret about wing held two visible screw heads Right author launches Buzzbat another flight Low drag makes ship good performer light winds aileron arm straight forward aileron neutral Use 1/64 ply shim up slot necessary Most type hinge Radio South etc good other locations -in-wide brass strip crimp Ufittings around Swingee arm threads Trim smooth matched pair Out 344 U-fitting make hole clevis pin sized neither bind sioppy Place close possible arms maximum deflection Use metal clevis keeper instead nylon type Aileron trimming will made rotation entire pushrod ball socket end Zap-glue ribs atime spar sheeting maintaining pressure against rib bottoms Check rib fronts tops straightedge sand down build up necessary achieve uniformity Put 1/16 balsa doubler front center bottom sheeting splice wing halves together Add 1/16 sheeting over tops RO ribs splice top center sheeting Cut add vertical webbing sub-leading edge Cut 1/16 ply braces go wing bottom under top sheeting Trim Y16-in ribs forward webbing glue brace flush work surface Rejoin sectioned ribs TS bracing Add block through sheeting attach front hold-down screw block must sufficient size/strength screw get good bite supports models weight G-forces Add top spar sheeting rear brace Add shape leading edge Fit glue 1/34 ply plate rear aluminum hold-down fastens Drill Continued page 117 March 1986 31 Letters Editor Continued page 12 authorized report Bills demise George L Eaton AKA CS Verral now holds copyrights Bills future Bill Barnes killed automobile ac cident No way next thing know will try tell Glenn Miller killed plane crash Bill Barnes lives Bud Overn Santa Ana CA Great men like Barnes legends Bill seen gas station Elcino Lake Charles Nats Safeway super market North Platte Truth must faced fateful day 1952 great pilot foolishly ventured out red Volks wagen van near-hurricane conditions demise covered up CIA due planned highly-sensitive mission Near East could have brought lasting peace region New York Times reluctantly deleted obit Since Frank Tinsley retired happy mayor New England town friends hid news sad event would have broken heart Yes party New York town house reported pa pers Bud Ovem may aware Barnes identical twin perhaps thwarted Japanese Aleu tians Until secret file Pentagon declassffied lips sealed Shorty Sandy party might see things after happy consump tion colorless odorless liquid olives toothpicks butler whispered man New Yorker old times sake Russian-like liquid actually Barnes secret engine coolant drained through loaves white bread Pepperidge family size stood end remove toxic agent Perhaps will news Bud real Sandy always wore green silk shirt first three buttons open reveal tatoo Stormer Sandy wore polka-dot tie nightdoesnt square Having visited soft-spoken FBI type still-secret file can say no EditorPublisher Wheeley has firmly advised same operator publish another word about Barnes case closed Since personally edited Chuck Ver rals copy George L Eaton will sign affidavit Chuck shared chore alternate-month basis Harold Mon tanye Bud Overn Chuck others will remiss Monty forgotten pal Bill playing tennis Gosh Chuck cant tell brothers apart Bill Winter Fairfax VA Buzzbat Continued page 31 hole 4-40 blind nut near plate front dead center wing Make rear hold-down bends somewhat rounded available use tempered aircraft-type aluminum Center punch bent ends out about Y16 drill %2-in holes Tap 4-40 threads Temporarily attach hold-down set wing position saddle Mark hole fuselage bottom drilled Repeat front hold-down foot bent forward accommodate servo locate front hole making template scrap balsa match hold-down hole spacing Lay template fuselage bottom mark Drill holes fuselage resting firmly block making final installation hold-downs glue notched ply plates wing around cant rotate Extend bottom sheeting toward aileron servo minimize open area enclosed fuselage Cut x 1in piece -in birch ply glue centered inside extend over ply plate adjacent bottom sheeting Drill through 4-40 blind nut Attach -in balsa vertical crosspiece aft servo Add TS places ply plate other bottom sheeting meets other Continued page 120 March1986 117 K responding advertisers mention read about Model Aviation DALLAIRE SPORTSTER SPECIFICATIONS Wing Span 72 Inches Wing Chord 11 Inches Power 21-30 Engine Radio 3 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware %$OLD TIMER Rt 1 Box 190 a MS 38754 Telephone 601 2473578 Buzzbat Continued page 117 structural members common damage bad landing piy plates breaking away Add remaining top center sheeting cap strips ex treme tips ply facing wing faking can shaped tack-glued hatch rear broken away glued leading edge wing mounted remainder faking fitted Magic Model Filler can smooth everything out Temporarily add 6-in seating tape adding facingto get good merge between hatch fairing Aileron servo installation Rails glued inside inboard RO ribs po sitioned center servo output wheel vertically cavity metal bracket screws over servo case under side cutout sheeting over servo wheel gives /1-in space Butt servo bottom against rear brace flopped cable best clears front hold-down Aileron differential up down provided placing Yie-in ball links offset holes output wheel Try 450 get least twice much up down avoid adverse yaw Use hole radius least /16 get enough aileron movement Servo-to Swingee linkup plans show applies small white Swingee control wire will run high low ball links side wheel builder dark opposing Swingees used both ball links can top bottom wheel preferably bottom easier access Study servo rotation corresponding Swingee action planes rear radio observe whats happening As turns linear movement up-aileron must greater Tape ailerons neutral Mark cut paths holes pushrod wires through ribs Use coupler suf ficient threads adjustments solder coupler wire aileron end Put metal clevis centered threads use keeper radio output wheel neutral sockets couplers mark wires cut servo end go deep couplers Cut epoxy wires couplers avoid bonding Swingee parts secure rear portions CyA dropped through small holes made balsa Optional aileron gap covers An idea better gap covers referred plans came after plans inked After covered allerons installed cut -in-wide strip thin rigid plastic 3 mil clear drafting Mylar excellent attach -in-wide double-sticky clear Scotch tape can external under covering wing low heat used Static electricity requires clean environ ment following steps First tape -in strip cutto length work sufface bits black tape placed edge stretch care fully lower position length doublesticky tape accurately other long edge some excess both ends Remove black tape Holding excess ends carefully position over gap slowly lower position Trim excess Finishing various tex coverings bear up better fuselage unrein forced films single 8-in-wide piece can fuselage Make overlaps forward fm around nose Alter fuselage covered protect raw edges around bolt holes large washer eyelet bushing broad flange #5 Dritz Mighty Snaps packet size 24 sewing outlets contains posts well-suited application Put -in dense latex foam Ace Sig etc around three sides fronts battery receiver hatch underside can hollowed out necessary Run antenna down fuselage -in balsa stick typical switch harness nuis ance install since full charge should give three four hours operation battery-to-receiver adapter practical alternative Balance trim saddle cut conform plans wing has 10 incidence Balanced out stab 0-0 little tendency bailcon ship must flown out its heading Use 450 500 mAh pack Vie-in sheet lead squares forward battery balancing necessary Balancing point shown plans enough stab throw will permit gcod spins may fly too squirrely first low-time pilots youre experi enced pilot balance model begin spar trim elevator level flight Keep stab throw front about Ye way initially ship touchy pitch axis After familiarity may want increase throw obtain true spins tighter turns etc Use dual rate setting trans mitter available Tight spins possible adequate stab movement center gravity CG too far ward Some pictures show larger fin hampered spins fm size plans gives ample directional stabil ity akspeeds up tip walk experienced increase aileron differ ential bottom ballast used larger groinmets can adjusted vertically wing hold-downs hold lead onto fuse lage bottom sure sheet lead weights cut folded maintain desired balance point FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY 120 Model Aviation ONLY $4995 Atom Back Approx Wi 175 oz Displacement 09 Cu Bore-5 Stroke 5 Piston Steel Crank CaseMagnesium Alloy inal Crankshaft Bearing Silicon Bronze Cylinder- Chromally Steel Approx RPM -12000 Grey Cox 7 x 4 prop FOBLsAngebs cA cA residents add 6% Sales Tax Order Direct ATOM smallest Ignition engines ever produced Designed R Arden further developments John Morrill Simplex Engines Limited Production Run Delivery 10 12 weeks ARO will receive within 7 days order con firming postcard verify receipt order give assigned engine number ap proximate delivery date Morrill-ADC PO Box 1210 Simi Valley CA 93062
Edition: Model Aviation - 1986/03
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 117, 120
NO OCR TEXT NO OCR TEXT fuselage incorporates special nose construction essentially simple plywood box balsa added permit shaping oval cross section Solid balsa tall surfaces simplify construction airfoils sanded symmetrical sections offer desired low drag THIS 5-FT SLOPE SOARER can easily quickly built can tear across sky high-speed runs can perform aerobatic maneuvers two-channel controls Inside out side loops spins extended inverted flight horizontal vertical rolls inside outside tight vertical turns blistering dives abrupt pullouts high-speed passes kinds showy flight duck soup design distinctive racy appearance rugged highly functional especially clean single nut bolt screw dowel rubberband horn pushrod hangs out ailerons can gapless Swingee fittings used ailerons linkage internal servo tucked flat wing cavity hooked directly Swingees Ailerons hooked up operate differentially Turn ing response ailerons alone no rudder excellent especially tight upelevator given after banking model pushrod flying stab entirely internal passing through fin bellcrank crisp action reliable neutral wing cleanly attached via internal hold-downs Only two little bolt heads visible bottom However 5-ft span assembled model makes small package easily transported slope site ready-to-fly condition An all-up weight 26 oz results wing loading about 8 ozIsq ft pound sheet lead can added internally increase loading higher winds style flying like Buzzbat will saunter around peace fully light wind flying gets interesting lift strong enough downstick pressure used some real speed point youd best blink make diving pass may wonder went ConstructIon Youll need following materials Wood medium-density balsa unless otherwise specified 2 x 3 x 36 ribs Four 6 x spruce spars Two 36 sub-leading edge Two 36 leading edge Two 1 x 36 beveled 1/16 x ling edge stock TE ailerons 3 x hard balsa sparwebbingfrom center Rl wing tip undersides x 36 hatch underbelly 3 x soft fin decking top wing tips 3 x /16 x 36 hard spar webbing Rl R9 interior wing saddle x 36 fuselage doublers x 36 light C-grain stab Four triangular stock joining fuselage sides formers wing ribs dihedral braces misc Four 3 x 1/16 x 36 wing sheeting cap strips ard running antenna down fuselage Spruce x o mounting Birch ply 3/, ers nose center core 24 Model Aviation Hatch merges cleanly ins wing Tairing LomDnuu WEIn IlK um nuD ails provides good wind penetration Contour-type paint scheme adds aireauraleek appearance Birch ply 1/16 x 12 x 48 slab sides bottom braces part bottom sheeting misc Birch /32 ply inlays fin Birch . ply sub-decking aft rear former Music wire 1/16 support Aluminum tubing 1/16 ID stab Two 055 1/i. x 36 music wire aileron stab pushrods Four metal devises Six 2-56 threaded couplers pushrod ends Two Swingees smaller white Delrin type available -in *4 sheet metal screws attach front hold-down 4-40 blind nut attach rear hold-down Two aileron hinges one-piece types fine Three -in 4-40 bolts round heads Tap size 4-40 4-40 self-tapping screw Two Du-Bro A6-in threaded ball links/sockets Aluminum strip Yio x wing hold-downs preferably tempered aircraft aluminum Thin sheet metal tin can etc aileron servo bracket Nylon 1A6-in sheet Sig stab bellcrank Vinyl seating tape 1/16 x saddle Brass 016 sheet making U around Swingee arms Lead 1/16-in sheet ballasting optionai Fuselage Make matched pair 1/ p1y sides As shown up 500 mAhuncased square battery pack wrapped -in latex foam bottom sides can accommodated 450 niAh pack con figured plans will also fit Use root pattern mark wing saddle contour incidence shown front hold-down bent plans space left accept large elevator servo aft former servo plan use can go forward plans show bend hold-down fcot forward notching sides front crosspiece accord ingly front former should just wide enough accept elevator servo cross wise mounting ears 4-in rails Make formers glue side fuselage other inverting assembly gcod alignment Cut attach interior saddle pieces Cut -in ply center core nose noting fits Via-in below top sides Make matched pair spacers fit against sides join front end Glue spacers core trim screw head clearance Cut ply bottom mark centerline Cut 42 birch ply hold-down crosspieces width fuselage bot tom servo used small enough go forward former cut rectangle snugly accept sideways Depending other space needs setup may placed forward battery-toreceiver adapter could also used eliminate bulky wiring harness Add triangular stock TS inside edges fuselage except hatch aft fin front Join nose core/spacer assembly sides Glue bottom crosspieces compart ment divider optional Fin Cut out shape noting goes bottom sides Make bellcrank standard 500 mAh battery pack fits nose Battery-to-receiver adapter cable usea instead bulky switch harness Hatch slides off keys accurately fuselage Wing attaches two Alien-head bolts shown nere Dritz posts sewing Item recess bolt heads provide seats protecting bottom fuselage Swingee-operated ailerons eliminate external hardware Authn says youve never tried youve mimeed * tewlf dmvi Tavi dtaii tII wn Wing trailing edge ailerons included made standard beveled stock forsimplification keep parts fabrication minimum Sig nylon Use #40 bit %2-in wireanda#51 or#S2fortheclevisforno sloppiness binding Make belicrank cutout Trim away 1/32 around bellcrank fin bottom out about inlays go easiest accomplish before balsa sections glued together using inlays marking Add 1/16 ply doublers inlays main support wire Glue inlay Position other Yi6-in shim between make keying marks drill %2-in hole sewing thread spool hole shimmed down decreasing diameter pieces tubing makes good drilling guide Place bellcrank outsides drill series holes arc front stab connecting wire smooth out rough spots Mark path pushrod through fin align servo output arm common carpenters saw can used cut pushrod slot fin bottom pushrod can made 055 1/its-in wire threaded couplers ends threaded rods inserted Y16-in dowel Assemble pushrod lay fin slot Fill underneath balsa Run Yn-in support wire through Glue other inlay rechecking alignment free movement Use Zap cyanoacrylate CyA glue wire inlays Glue Cm fuselage side flush bottom trim TS front fin Clamp fin between sides eyeball shift fin needed eliminate built-in turning tendency ignore leaning Zap 1-in length 1/ cross-grained ply subdecking top just forward Cm secure positioning Glue fin other side let 26 Model Aviation Flying stab pivots rigid support actuated pushrod/bellcrank arrangement assures well-defined neutral Pivot location stab design avoid high-speed fiutter Fin sandwiches between tue ena Olin ply sides s slim extremely strong rear Stab roots fit cieaniy fiat sides ofthefin BUZ ZBAT 2 CHANNEL SLOPE SOARER DESIGNED BY HARLEY MICHAELIS /4 BALSA C NIRA BALSA FIN~CN 3/32 BALSA /64 PLY-DOUBLER 1/32 PLY BALSA OVER 1/16 PLY KEYHOLE PLATE /8 PLY CORE 3/16BALSA WEB 1/16 PLY BOTTOM 1/16 x /4I/B SUB L E SPRUCE SPARS 26 PLY WING BRACES BALSA N N - SWINGEE 1/16 WIRE BALSA TE STOCK ONE PIECE N CAP STRIPS N NN 1/16 BALSA SHEETING TOP BOTTOM N N N- N I/4x3/8 LE glue dry fin leans hold fuselage between knees twist 1-in sections /64 ply subdecking progres sively glued CyA Its good idea protect fingers backing iron-on covering CyA fires Install elevator servo complete pushrod rear former install crosspieces etc guide route pushrod clear hold-downs Finish Y64 ply subdecking sand corners make square box Add hard balsa pine nose core front underbelly Add sheet stock ply box structure shaping fuselage using lighter balsa rear Cut hatch block profile sides fuselage Glue Ys4 ply bottom edges hatch hold-down screw goes Fit dovetailed /s ply plate atop spacer blocks between sides hatch block position drill through mounting plate estab lish common centerline screw rear keyhole slot Set adjust screw hatch punch pinholes balsa around thoroughly reinforce area thin CyA glue Make keyhole slot plate glue place Add keying plate hatch rear underside Sand down ply box corners except along saddle edges Merge /16 ply along hatch area simultaneously shaping hatch razor plane flat Permagrit tool excellent aid forming nice oval cross sections Cut glue fm extension slightly above line stab Work fin generally symmetrical airfoil keep flat stab butts Stab Cut -in balsa preferably light medium C-grain stock Lay against fin correct position mark 3Az-in ID tubes go Cut snug slots press tubes Slip halves make snug slots /16-in ID tubing Shift stab halves slots until same plane aligned well wing saddle Use tiny drop CyA secure tubes position Remove add CyA fill around tubes epoxy putty etc Shape nice symmetrical airfoil thinning toward tips Reinforce I/IS BALSA SHEETING B BALSA B PLY WINGCAP STRIPS ARE NOT SHOWN TIP-DEE CROSS SECTON THIS PANEL FOR CLARITY AT RIGHT TIP 3/32 BALSA RIBS I- II/IBI/4WINGPLANTOPVI SPRUCE SRS I-7R-6P-SR-4R-3P-S I__ AILERON HINGE / //4 50 BALSA YE STOCK SWINGEE BALSA BIB NOTE MAKE PLY RIBO& ROOT AIRFOIL 9 10 STACK CUT 3/32 BALSA SPARTRIM 2 P0~REAR WING FAIRINGRIBS-REARDOUBLERr PLY FACE ROOTR-9R-O BALSA SHEETSADDLE /4 1/6 PLYEDGE BALSATRI STOCK I/IS PLY PLANKSI/ISB" PLYI/BI/B BALSA IBALSAFUSELADE3/IS BA IA-AI/S ~M SHAPE~SHEET _____B-B WING FAIRING DETAILPLY ________BALSA DETAILSEATING 1/16 PLY KEYHOLESPACER1/4 BALSAFORMERL15WING TAPE SOLID BALSAFLATBLOCKYRI-STOCIBPOF CHEEKSA TRECEIVER ABA AREA /8 BALSA SIDES TAPER DOWN TO REAP SLAB SIDE A-/ S/ BALSA WING 3/35 PLY SADDLE FUSELAGE FORMERS 1p-I-S/B _______ 3/35 PLY FORMERS 7-I/S 7-3/4~I/8LONuOC1-3/4FUSELAGE SIDEI-3/4 H/S --- 7 3/B OFF IIS-S/BPLY FAIRING4-40 BL SOLIDORENUTFORM BA I/B PLY____ _ - zmTF AREA 7JECES/ERTh bX__ SOLI BALSA SEERAIL HARD BALSA ORCROSS SECTIONS A-B-C OPTIONAL PINE CHEEKS1/4 TRI STOCKI/IS PLY BOTTOM harden thin edges application ofoutput pushrod clears holdthin CyAdowns Adjust stab 0-0 neutral Position stab servo adjust theis line bottom fuselage 1/83/B ALUM 4-40 TAP 1/4 BALSA TRI -STOCK SAND TO PLY HERE SPACER BLOCKSLAB SIDE--450 MIL I/B PLYPAK COREKkA-lJ HARD---BATT PAK BALSA CHEEK DETAIL NOSEBALSA Left shot interior saddle pieces already 1/16 ply sides joined farmers Ply nose core/spacer glued onto front end Right Bottom croaspieces 1/16 ply glued sides triangle stock added reinforcing hatch keying plate has already glued place Elevator servo recessed fuselage bottom will attached mounting rails 28 Model Aviation 80 Full-Size Plans Available. See Page 164 XJBLERS TO1/16 BALSA SHEETING1/4 3/8 BALSA1/32 PLY CORE B LICE SHEETS-.--TOP 16 BOTTOM-BUTTLEADING EDGEI/B BALSABALSA BLOCK WING nc m nonoSUB L ETIPS I--808-0 RO I6PLYIS~VOSPRUCE 50CK5 1/16 ANG RACESI/4WEBS TO 16 d/4PLYSLOTAS THICK AS THEN 3/16 TO /16BALSA SPRUCE SWINGEE 4 WING TI OSHSTRIPS LSA WEB SPARS NOTE GRAIN BRASS U 1/4 50 BALSA NDI/I6II-IR- /83--4R-S I/I6I/2R7SPAR RB8-I ENTER-~ S OR I/lB ALSA WIRE NOTCH - _ SWINGEE 1/16 PLY ON BOTTOMSIND NUT E S100 PLY DETAIL 4 PLY~ B DEcK C-C CCW ON RIGHT AlL SERVO LOW WIREBALSA T E STOCK REVERSE FOR CWI ONE PIECE OPTIONAL 1/64 PLY GAP COVER SEE TEXT 1/16 PLY WING BRACES NO DIHEDRAL _____/ /16 PLY_______________[11 IDES___________________________________II Ii 25 FINFILL SLOT LBOERr2WINGBRACESjJ PUSHRcIO WIRE/16 PLY BOTTOM 3/32 PLY WITH BALSAIdSTAB CROSSFORMS EXTERIOR SS PIECES SEC ONCONTOUR REARI/B BALSA DETAILC GRAIN /4/ALUMINUM1/64 TUBES ________1/4 BALSA FIN EXTERSION FIN FRONT 1/16 PLY ~JBLER 1/32 PLY FIN DOUBLER I/4\l ThI STOCK BETWEEN SLAB SIDES 3/ 2 1/16 LLASTNG OPTIONS1/16SHEET LEAD 9APPROX 40Z 0 EACH DEIJBLE LAY BETWEEN NOLD DOWNS NOTE 5157 YEFFECTU/4 BALSA C RADIO SIGNAL- RUN ANTENNA HIGHIIIGRAJN IN FUSELAGEIf4I III&BALSA T 1/4 BALSA FINFIL ERFill EXT CONTOURII1/32 PLY INLAY C-CEXTENSIONI 1/16 PLY DOUBLER / jI rqj ii-1/16 NYLON SOLID BALSAIII 111/16 SEE X-SECT BALSA 1/8 BALSA OVER 1/16 PLY SIDES MW PUSHROD SLOT FOR PUSH ROD THIN CLEVIS BALSA 0I23456 FUSELAGE BOTTOM TO FIT ELEV SERVO CASE PLY KEY HATCH IL RAILS ON RIBS BRACKET TO SECURE SERVO WINGDETAIL MODEL AVIATION BUZZBAT 2 CHANNEL SLOPE SOARER SPAN 60 LENGTH 39 AREA 4S0 SQIN DESIGNED BY HARLEY MICHAELIS AMA 32343 [SF ~ ACING BY 70E DEMARcO March 1986 29 ALL RIGHTS RESERVED Left cutout made f stab belicrank slotted underneath accommodate pushrod 3/32-in stab wire rigidlysupported inthe ply inlays/doublers shimmed Spool servesasa drill guide Right Thefin isgiuded totheslab sides 1/64 ply subdecking added top bottom form ply box rugged very light enclosed hardware greatly reduces drag Left Balsa planks blocks added ply fuselage box keyed hatch installed can shaped along rest fuselage Right Balsa sheeting worked razor plane sanding block oval cross sections ply box corners Keep working until nice sculptured shape achieved Model Magic Filler used author fix gaps dings make fillets Left 1/4-in vertical webs plywood braces blind nut have installed Servo railswlll capped balsa centerthe out put wheel vertically cavity Installing 3/16-In webbing out tips next Right Simple wing construction cuts buildIng time Wing flat Permagrit sanding tool especially useful forming rib templates /32 balsa ribs Make RO R9 templates 6 ply Use cut four RO ribs two R9 ribs Clamp eight rectangles balsa between RO R9 templates stack-shape Ri through R8 Reverse templates repeat pro cedure ribs other wing half Level rib tops andtrim /i-in off top edges innermost ROs forward wing brace Cut 6 x ce spars bottom sheeting Note sheeting extends forward -in-thick sub-leading edge Butt-glue spars sheeting except vertical front wing brace goes Trim /16-in sheeting allow brace Pin sheeting ribs work surface make line ball-point pen represent rear sub-leading edge Shape fit solid trailing edge TE stock extend out R5 rib stations Note underside trimmed outermost ROs inlaid /16 ply plate mini micro servo output wheel offset holes needed ailerons Space inboard RO ribs fit servo -in rails Cut -in-deep notches TE ends RO R4 Trim ribs accord ingly Pin TE place 46-in shim strip under RO-R4 ribs Zap TE front aileron line pin down 6in strip fairly hard balsa -in balsa spar strip hinging will later added rear half now glue ribs R5 out piece Cut deep notches spar strip ribs Bevel spar strip match airfoil glue Swingees should handpicked ones move freely have minimum slop piness arm other parts held flat install glue wide strip /16 ply use /32 ply thicker Swingee onto -in balsa aile ron mounting strip aligning against spar front between ribs Swingee will lay Use #11 blade ply cut slot bottom use Swingee guide cut top sides snug fit Cut pair spruce blocks -in long -in strip Trim match Swingee thickness Insert Swingee glue blocks ply form front portion slot sides Remove Swingee Cap strip Of/16 ply complete slot Drill /i6in holes through center ply Swingee hinge line close struc ture drop CyA holes secure taking care avoid bonding moving parts Shim /6-in drill bit drill slot 30 Model Aviation Left Ribs 1-Bare shaped Permagritfile balsa rectangies clamped between plywood templates RO R9 Spruce spars butt-join sheeting eilminating rib notches Above Wing builds flatno dihedral Ribs notched stock-size beveied trail Ing edge also used ailerons Ribs flrsttacked spar CyA one glued sheeting CyA Left An aluminum bracket secures servo rails 1/16-in ball links offset output holes provide aileron differential Right brass strip around Swingee arm receives metal clevis Swingee blocked lnwith spruce ply glued CyA Left OptIonal 1/64 ply coversthe alieron gap thlsvlew underside slit rubbercement bead added cementcures acts hinge slit cracked Right Wing fairing has ply core balsa planking Hatch slides beneath streamlining Len I apered aluminum hold-downa secured wing part secret about wing held two visible screw heads Right author launches Buzzbat another flight Low drag makes ship good performer light winds aileron arm straight forward aileron neutral Use 1/64 ply shim up slot necessary Most type hinge Radio South etc good other locations -in-wide brass strip crimp Ufittings around Swingee arm threads Trim smooth matched pair Out 344 U-fitting make hole clevis pin sized neither bind sioppy Place close possible arms maximum deflection Use metal clevis keeper instead nylon type Aileron trimming will made rotation entire pushrod ball socket end Zap-glue ribs atime spar sheeting maintaining pressure against rib bottoms Check rib fronts tops straightedge sand down build up necessary achieve uniformity Put 1/16 balsa doubler front center bottom sheeting splice wing halves together Add 1/16 sheeting over tops RO ribs splice top center sheeting Cut add vertical webbing sub-leading edge Cut 1/16 ply braces go wing bottom under top sheeting Trim Y16-in ribs forward webbing glue brace flush work surface Rejoin sectioned ribs TS bracing Add block through sheeting attach front hold-down screw block must sufficient size/strength screw get good bite supports models weight G-forces Add top spar sheeting rear brace Add shape leading edge Fit glue 1/34 ply plate rear aluminum hold-down fastens Drill Continued page 117 March 1986 31 Letters Editor Continued page 12 authorized report Bills demise George L Eaton AKA CS Verral now holds copyrights Bills future Bill Barnes killed automobile ac cident No way next thing know will try tell Glenn Miller killed plane crash Bill Barnes lives Bud Overn Santa Ana CA Great men like Barnes legends Bill seen gas station Elcino Lake Charles Nats Safeway super market North Platte Truth must faced fateful day 1952 great pilot foolishly ventured out red Volks wagen van near-hurricane conditions demise covered up CIA due planned highly-sensitive mission Near East could have brought lasting peace region New York Times reluctantly deleted obit Since Frank Tinsley retired happy mayor New England town friends hid news sad event would have broken heart Yes party New York town house reported pa pers Bud Ovem may aware Barnes identical twin perhaps thwarted Japanese Aleu tians Until secret file Pentagon declassffied lips sealed Shorty Sandy party might see things after happy consump tion colorless odorless liquid olives toothpicks butler whispered man New Yorker old times sake Russian-like liquid actually Barnes secret engine coolant drained through loaves white bread Pepperidge family size stood end remove toxic agent Perhaps will news Bud real Sandy always wore green silk shirt first three buttons open reveal tatoo Stormer Sandy wore polka-dot tie nightdoesnt square Having visited soft-spoken FBI type still-secret file can say no EditorPublisher Wheeley has firmly advised same operator publish another word about Barnes case closed Since personally edited Chuck Ver rals copy George L Eaton will sign affidavit Chuck shared chore alternate-month basis Harold Mon tanye Bud Overn Chuck others will remiss Monty forgotten pal Bill playing tennis Gosh Chuck cant tell brothers apart Bill Winter Fairfax VA Buzzbat Continued page 31 hole 4-40 blind nut near plate front dead center wing Make rear hold-down bends somewhat rounded available use tempered aircraft-type aluminum Center punch bent ends out about Y16 drill %2-in holes Tap 4-40 threads Temporarily attach hold-down set wing position saddle Mark hole fuselage bottom drilled Repeat front hold-down foot bent forward accommodate servo locate front hole making template scrap balsa match hold-down hole spacing Lay template fuselage bottom mark Drill holes fuselage resting firmly block making final installation hold-downs glue notched ply plates wing around cant rotate Extend bottom sheeting toward aileron servo minimize open area enclosed fuselage Cut x 1in piece -in birch ply glue centered inside extend over ply plate adjacent bottom sheeting Drill through 4-40 blind nut Attach -in balsa vertical crosspiece aft servo Add TS places ply plate other bottom sheeting meets other Continued page 120 March1986 117 K responding advertisers mention read about Model Aviation DALLAIRE SPORTSTER SPECIFICATIONS Wing Span 72 Inches Wing Chord 11 Inches Power 21-30 Engine Radio 3 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware %$OLD TIMER Rt 1 Box 190 a MS 38754 Telephone 601 2473578 Buzzbat Continued page 117 structural members common damage bad landing piy plates breaking away Add remaining top center sheeting cap strips ex treme tips ply facing wing faking can shaped tack-glued hatch rear broken away glued leading edge wing mounted remainder faking fitted Magic Model Filler can smooth everything out Temporarily add 6-in seating tape adding facingto get good merge between hatch fairing Aileron servo installation Rails glued inside inboard RO ribs po sitioned center servo output wheel vertically cavity metal bracket screws over servo case under side cutout sheeting over servo wheel gives /1-in space Butt servo bottom against rear brace flopped cable best clears front hold-down Aileron differential up down provided placing Yie-in ball links offset holes output wheel Try 450 get least twice much up down avoid adverse yaw Use hole radius least /16 get enough aileron movement Servo-to Swingee linkup plans show applies small white Swingee control wire will run high low ball links side wheel builder dark opposing Swingees used both ball links can top bottom wheel preferably bottom easier access Study servo rotation corresponding Swingee action planes rear radio observe whats happening As turns linear movement up-aileron must greater Tape ailerons neutral Mark cut paths holes pushrod wires through ribs Use coupler suf ficient threads adjustments solder coupler wire aileron end Put metal clevis centered threads use keeper radio output wheel neutral sockets couplers mark wires cut servo end go deep couplers Cut epoxy wires couplers avoid bonding Swingee parts secure rear portions CyA dropped through small holes made balsa Optional aileron gap covers An idea better gap covers referred plans came after plans inked After covered allerons installed cut -in-wide strip thin rigid plastic 3 mil clear drafting Mylar excellent attach -in-wide double-sticky clear Scotch tape can external under covering wing low heat used Static electricity requires clean environ ment following steps First tape -in strip cutto length work sufface bits black tape placed edge stretch care fully lower position length doublesticky tape accurately other long edge some excess both ends Remove black tape Holding excess ends carefully position over gap slowly lower position Trim excess Finishing various tex coverings bear up better fuselage unrein forced films single 8-in-wide piece can fuselage Make overlaps forward fm around nose Alter fuselage covered protect raw edges around bolt holes large washer eyelet bushing broad flange #5 Dritz Mighty Snaps packet size 24 sewing outlets contains posts well-suited application Put -in dense latex foam Ace Sig etc around three sides fronts battery receiver hatch underside can hollowed out necessary Run antenna down fuselage -in balsa stick typical switch harness nuis ance install since full charge should give three four hours operation battery-to-receiver adapter practical alternative Balance trim saddle cut conform plans wing has 10 incidence Balanced out stab 0-0 little tendency bailcon ship must flown out its heading Use 450 500 mAh pack Vie-in sheet lead squares forward battery balancing necessary Balancing point shown plans enough stab throw will permit gcod spins may fly too squirrely first low-time pilots youre experi enced pilot balance model begin spar trim elevator level flight Keep stab throw front about Ye way initially ship touchy pitch axis After familiarity may want increase throw obtain true spins tighter turns etc Use dual rate setting trans mitter available Tight spins possible adequate stab movement center gravity CG too far ward Some pictures show larger fin hampered spins fm size plans gives ample directional stabil ity akspeeds up tip walk experienced increase aileron differ ential bottom ballast used larger groinmets can adjusted vertically wing hold-downs hold lead onto fuse lage bottom sure sheet lead weights cut folded maintain desired balance point FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY 120 Model Aviation ONLY $4995 Atom Back Approx Wi 175 oz Displacement 09 Cu Bore-5 Stroke 5 Piston Steel Crank CaseMagnesium Alloy inal Crankshaft Bearing Silicon Bronze Cylinder- Chromally Steel Approx RPM -12000 Grey Cox 7 x 4 prop FOBLsAngebs cA cA residents add 6% Sales Tax Order Direct ATOM smallest Ignition engines ever produced Designed R Arden further developments John Morrill Simplex Engines Limited Production Run Delivery 10 12 weeks ARO will receive within 7 days order con firming postcard verify receipt order give assigned engine number ap proximate delivery date Morrill-ADC PO Box 1210 Simi Valley CA 93062
Edition: Model Aviation - 1986/03
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 117, 120
NO OCR TEXT NO OCR TEXT fuselage incorporates special nose construction essentially simple plywood box balsa added permit shaping oval cross section Solid balsa tall surfaces simplify construction airfoils sanded symmetrical sections offer desired low drag THIS 5-FT SLOPE SOARER can easily quickly built can tear across sky high-speed runs can perform aerobatic maneuvers two-channel controls Inside out side loops spins extended inverted flight horizontal vertical rolls inside outside tight vertical turns blistering dives abrupt pullouts high-speed passes kinds showy flight duck soup design distinctive racy appearance rugged highly functional especially clean single nut bolt screw dowel rubberband horn pushrod hangs out ailerons can gapless Swingee fittings used ailerons linkage internal servo tucked flat wing cavity hooked directly Swingees Ailerons hooked up operate differentially Turn ing response ailerons alone no rudder excellent especially tight upelevator given after banking model pushrod flying stab entirely internal passing through fin bellcrank crisp action reliable neutral wing cleanly attached via internal hold-downs Only two little bolt heads visible bottom However 5-ft span assembled model makes small package easily transported slope site ready-to-fly condition An all-up weight 26 oz results wing loading about 8 ozIsq ft pound sheet lead can added internally increase loading higher winds style flying like Buzzbat will saunter around peace fully light wind flying gets interesting lift strong enough downstick pressure used some real speed point youd best blink make diving pass may wonder went ConstructIon Youll need following materials Wood medium-density balsa unless otherwise specified 2 x 3 x 36 ribs Four 6 x spruce spars Two 36 sub-leading edge Two 36 leading edge Two 1 x 36 beveled 1/16 x ling edge stock TE ailerons 3 x hard balsa sparwebbingfrom center Rl wing tip undersides x 36 hatch underbelly 3 x soft fin decking top wing tips 3 x /16 x 36 hard spar webbing Rl R9 interior wing saddle x 36 fuselage doublers x 36 light C-grain stab Four triangular stock joining fuselage sides formers wing ribs dihedral braces misc Four 3 x 1/16 x 36 wing sheeting cap strips ard running antenna down fuselage Spruce x o mounting Birch ply 3/, ers nose center core 24 Model Aviation Hatch merges cleanly ins wing Tairing LomDnuu WEIn IlK um nuD ails provides good wind penetration Contour-type paint scheme adds aireauraleek appearance Birch ply 1/16 x 12 x 48 slab sides bottom braces part bottom sheeting misc Birch /32 ply inlays fin Birch . ply sub-decking aft rear former Music wire 1/16 support Aluminum tubing 1/16 ID stab Two 055 1/i. x 36 music wire aileron stab pushrods Four metal devises Six 2-56 threaded couplers pushrod ends Two Swingees smaller white Delrin type available -in *4 sheet metal screws attach front hold-down 4-40 blind nut attach rear hold-down Two aileron hinges one-piece types fine Three -in 4-40 bolts round heads Tap size 4-40 4-40 self-tapping screw Two Du-Bro A6-in threaded ball links/sockets Aluminum strip Yio x wing hold-downs preferably tempered aircraft aluminum Thin sheet metal tin can etc aileron servo bracket Nylon 1A6-in sheet Sig stab bellcrank Vinyl seating tape 1/16 x saddle Brass 016 sheet making U around Swingee arms Lead 1/16-in sheet ballasting optionai Fuselage Make matched pair 1/ p1y sides As shown up 500 mAhuncased square battery pack wrapped -in latex foam bottom sides can accommodated 450 niAh pack con figured plans will also fit Use root pattern mark wing saddle contour incidence shown front hold-down bent plans space left accept large elevator servo aft former servo plan use can go forward plans show bend hold-down fcot forward notching sides front crosspiece accord ingly front former should just wide enough accept elevator servo cross wise mounting ears 4-in rails Make formers glue side fuselage other inverting assembly gcod alignment Cut attach interior saddle pieces Cut -in ply center core nose noting fits Via-in below top sides Make matched pair spacers fit against sides join front end Glue spacers core trim screw head clearance Cut ply bottom mark centerline Cut 42 birch ply hold-down crosspieces width fuselage bot tom servo used small enough go forward former cut rectangle snugly accept sideways Depending other space needs setup may placed forward battery-toreceiver adapter could also used eliminate bulky wiring harness Add triangular stock TS inside edges fuselage except hatch aft fin front Join nose core/spacer assembly sides Glue bottom crosspieces compart ment divider optional Fin Cut out shape noting goes bottom sides Make bellcrank standard 500 mAh battery pack fits nose Battery-to-receiver adapter cable usea instead bulky switch harness Hatch slides off keys accurately fuselage Wing attaches two Alien-head bolts shown nere Dritz posts sewing Item recess bolt heads provide seats protecting bottom fuselage Swingee-operated ailerons eliminate external hardware Authn says youve never tried youve mimeed * tewlf dmvi Tavi dtaii tII wn Wing trailing edge ailerons included made standard beveled stock forsimplification keep parts fabrication minimum Sig nylon Use #40 bit %2-in wireanda#51 or#S2fortheclevisforno sloppiness binding Make belicrank cutout Trim away 1/32 around bellcrank fin bottom out about inlays go easiest accomplish before balsa sections glued together using inlays marking Add 1/16 ply doublers inlays main support wire Glue inlay Position other Yi6-in shim between make keying marks drill %2-in hole sewing thread spool hole shimmed down decreasing diameter pieces tubing makes good drilling guide Place bellcrank outsides drill series holes arc front stab connecting wire smooth out rough spots Mark path pushrod through fin align servo output arm common carpenters saw can used cut pushrod slot fin bottom pushrod can made 055 1/its-in wire threaded couplers ends threaded rods inserted Y16-in dowel Assemble pushrod lay fin slot Fill underneath balsa Run Yn-in support wire through Glue other inlay rechecking alignment free movement Use Zap cyanoacrylate CyA glue wire inlays Glue Cm fuselage side flush bottom trim TS front fin Clamp fin between sides eyeball shift fin needed eliminate built-in turning tendency ignore leaning Zap 1-in length 1/ cross-grained ply subdecking top just forward Cm secure positioning Glue fin other side let 26 Model Aviation Flying stab pivots rigid support actuated pushrod/bellcrank arrangement assures well-defined neutral Pivot location stab design avoid high-speed fiutter Fin sandwiches between tue ena Olin ply sides s slim extremely strong rear Stab roots fit cieaniy fiat sides ofthefin BUZ ZBAT 2 CHANNEL SLOPE SOARER DESIGNED BY HARLEY MICHAELIS /4 BALSA C NIRA BALSA FIN~CN 3/32 BALSA /64 PLY-DOUBLER 1/32 PLY BALSA OVER 1/16 PLY KEYHOLE PLATE /8 PLY CORE 3/16BALSA WEB 1/16 PLY BOTTOM 1/16 x /4I/B SUB L E SPRUCE SPARS 26 PLY WING BRACES BALSA N N - SWINGEE 1/16 WIRE BALSA TE STOCK ONE PIECE N CAP STRIPS N NN 1/16 BALSA SHEETING TOP BOTTOM N N N- N I/4x3/8 LE glue dry fin leans hold fuselage between knees twist 1-in sections /64 ply subdecking progres sively glued CyA Its good idea protect fingers backing iron-on covering CyA fires Install elevator servo complete pushrod rear former install crosspieces etc guide route pushrod clear hold-downs Finish Y64 ply subdecking sand corners make square box Add hard balsa pine nose core front underbelly Add sheet stock ply box structure shaping fuselage using lighter balsa rear Cut hatch block profile sides fuselage Glue Ys4 ply bottom edges hatch hold-down screw goes Fit dovetailed /s ply plate atop spacer blocks between sides hatch block position drill through mounting plate estab lish common centerline screw rear keyhole slot Set adjust screw hatch punch pinholes balsa around thoroughly reinforce area thin CyA glue Make keyhole slot plate glue place Add keying plate hatch rear underside Sand down ply box corners except along saddle edges Merge /16 ply along hatch area simultaneously shaping hatch razor plane flat Permagrit tool excellent aid forming nice oval cross sections Cut glue fm extension slightly above line stab Work fin generally symmetrical airfoil keep flat stab butts Stab Cut -in balsa preferably light medium C-grain stock Lay against fin correct position mark 3Az-in ID tubes go Cut snug slots press tubes Slip halves make snug slots /16-in ID tubing Shift stab halves slots until same plane aligned well wing saddle Use tiny drop CyA secure tubes position Remove add CyA fill around tubes epoxy putty etc Shape nice symmetrical airfoil thinning toward tips Reinforce I/IS BALSA SHEETING B BALSA B PLY WINGCAP STRIPS ARE NOT SHOWN TIP-DEE CROSS SECTON THIS PANEL FOR CLARITY AT RIGHT TIP 3/32 BALSA RIBS I- II/IBI/4WINGPLANTOPVI SPRUCE SRS I-7R-6P-SR-4R-3P-S I__ AILERON HINGE / //4 50 BALSA YE STOCK SWINGEE BALSA BIB NOTE MAKE PLY RIBO& ROOT AIRFOIL 9 10 STACK CUT 3/32 BALSA SPARTRIM 2 P0~REAR WING FAIRINGRIBS-REARDOUBLERr PLY FACE ROOTR-9R-O BALSA SHEETSADDLE /4 1/6 PLYEDGE BALSATRI STOCK I/IS PLY PLANKSI/ISB" PLYI/BI/B BALSA IBALSAFUSELADE3/IS BA IA-AI/S ~M SHAPE~SHEET _____B-B WING FAIRING DETAILPLY ________BALSA DETAILSEATING 1/16 PLY KEYHOLESPACER1/4 BALSAFORMERL15WING TAPE SOLID BALSAFLATBLOCKYRI-STOCIBPOF CHEEKSA TRECEIVER ABA AREA /8 BALSA SIDES TAPER DOWN TO REAP SLAB SIDE A-/ S/ BALSA WING 3/35 PLY SADDLE FUSELAGE FORMERS 1p-I-S/B _______ 3/35 PLY FORMERS 7-I/S 7-3/4~I/8LONuOC1-3/4FUSELAGE SIDEI-3/4 H/S --- 7 3/B OFF IIS-S/BPLY FAIRING4-40 BL SOLIDORENUTFORM BA I/B PLY____ _ - zmTF AREA 7JECES/ERTh bX__ SOLI BALSA SEERAIL HARD BALSA ORCROSS SECTIONS A-B-C OPTIONAL PINE CHEEKS1/4 TRI STOCKI/IS PLY BOTTOM harden thin edges application ofoutput pushrod clears holdthin CyAdowns Adjust stab 0-0 neutral Position stab servo adjust theis line bottom fuselage 1/83/B ALUM 4-40 TAP 1/4 BALSA TRI -STOCK SAND TO PLY HERE SPACER BLOCKSLAB SIDE--450 MIL I/B PLYPAK COREKkA-lJ HARD---BATT PAK BALSA CHEEK DETAIL NOSEBALSA Left shot interior saddle pieces already 1/16 ply sides joined farmers Ply nose core/spacer glued onto front end Right Bottom croaspieces 1/16 ply glued sides triangle stock added reinforcing hatch keying plate has already glued place Elevator servo recessed fuselage bottom will attached mounting rails 28 Model Aviation 80 Full-Size Plans Available. See Page 164 XJBLERS TO1/16 BALSA SHEETING1/4 3/8 BALSA1/32 PLY CORE B LICE SHEETS-.--TOP 16 BOTTOM-BUTTLEADING EDGEI/B BALSABALSA BLOCK WING nc m nonoSUB L ETIPS I--808-0 RO I6PLYIS~VOSPRUCE 50CK5 1/16 ANG RACESI/4WEBS TO 16 d/4PLYSLOTAS THICK AS THEN 3/16 TO /16BALSA SPRUCE SWINGEE 4 WING TI OSHSTRIPS LSA WEB SPARS NOTE GRAIN BRASS U 1/4 50 BALSA NDI/I6II-IR- /83--4R-S I/I6I/2R7SPAR RB8-I ENTER-~ S OR I/lB ALSA WIRE NOTCH - _ SWINGEE 1/16 PLY ON BOTTOMSIND NUT E S100 PLY DETAIL 4 PLY~ B DEcK C-C CCW ON RIGHT AlL SERVO LOW WIREBALSA T E STOCK REVERSE FOR CWI ONE PIECE OPTIONAL 1/64 PLY GAP COVER SEE TEXT 1/16 PLY WING BRACES NO DIHEDRAL _____/ /16 PLY_______________[11 IDES___________________________________II Ii 25 FINFILL SLOT LBOERr2WINGBRACESjJ PUSHRcIO WIRE/16 PLY BOTTOM 3/32 PLY WITH BALSAIdSTAB CROSSFORMS EXTERIOR SS PIECES SEC ONCONTOUR REARI/B BALSA DETAILC GRAIN /4/ALUMINUM1/64 TUBES ________1/4 BALSA FIN EXTERSION FIN FRONT 1/16 PLY ~JBLER 1/32 PLY FIN DOUBLER I/4\l ThI STOCK BETWEEN SLAB SIDES 3/ 2 1/16 LLASTNG OPTIONS1/16SHEET LEAD 9APPROX 40Z 0 EACH DEIJBLE LAY BETWEEN NOLD DOWNS NOTE 5157 YEFFECTU/4 BALSA C RADIO SIGNAL- RUN ANTENNA HIGHIIIGRAJN IN FUSELAGEIf4I III&BALSA T 1/4 BALSA FINFIL ERFill EXT CONTOURII1/32 PLY INLAY C-CEXTENSIONI 1/16 PLY DOUBLER / jI rqj ii-1/16 NYLON SOLID BALSAIII 111/16 SEE X-SECT BALSA 1/8 BALSA OVER 1/16 PLY SIDES MW PUSHROD SLOT FOR PUSH ROD THIN CLEVIS BALSA 0I23456 FUSELAGE BOTTOM TO FIT ELEV SERVO CASE PLY KEY HATCH IL RAILS ON RIBS BRACKET TO SECURE SERVO WINGDETAIL MODEL AVIATION BUZZBAT 2 CHANNEL SLOPE SOARER SPAN 60 LENGTH 39 AREA 4S0 SQIN DESIGNED BY HARLEY MICHAELIS AMA 32343 [SF ~ ACING BY 70E DEMARcO March 1986 29 ALL RIGHTS RESERVED Left cutout made f stab belicrank slotted underneath accommodate pushrod 3/32-in stab wire rigidlysupported inthe ply inlays/doublers shimmed Spool servesasa drill guide Right Thefin isgiuded totheslab sides 1/64 ply subdecking added top bottom form ply box rugged very light enclosed hardware greatly reduces drag Left Balsa planks blocks added ply fuselage box keyed hatch installed can shaped along rest fuselage Right Balsa sheeting worked razor plane sanding block oval cross sections ply box corners Keep working until nice sculptured shape achieved Model Magic Filler used author fix gaps dings make fillets Left 1/4-in vertical webs plywood braces blind nut have installed Servo railswlll capped balsa centerthe out put wheel vertically cavity Installing 3/16-In webbing out tips next Right Simple wing construction cuts buildIng time Wing flat Permagrit sanding tool especially useful forming rib templates /32 balsa ribs Make RO R9 templates 6 ply Use cut four RO ribs two R9 ribs Clamp eight rectangles balsa between RO R9 templates stack-shape Ri through R8 Reverse templates repeat pro cedure ribs other wing half Level rib tops andtrim /i-in off top edges innermost ROs forward wing brace Cut 6 x ce spars bottom sheeting Note sheeting extends forward -in-thick sub-leading edge Butt-glue spars sheeting except vertical front wing brace goes Trim /16-in sheeting allow brace Pin sheeting ribs work surface make line ball-point pen represent rear sub-leading edge Shape fit solid trailing edge TE stock extend out R5 rib stations Note underside trimmed outermost ROs inlaid /16 ply plate mini micro servo output wheel offset holes needed ailerons Space inboard RO ribs fit servo -in rails Cut -in-deep notches TE ends RO R4 Trim ribs accord ingly Pin TE place 46-in shim strip under RO-R4 ribs Zap TE front aileron line pin down 6in strip fairly hard balsa -in balsa spar strip hinging will later added rear half now glue ribs R5 out piece Cut deep notches spar strip ribs Bevel spar strip match airfoil glue Swingees should handpicked ones move freely have minimum slop piness arm other parts held flat install glue wide strip /16 ply use /32 ply thicker Swingee onto -in balsa aile ron mounting strip aligning against spar front between ribs Swingee will lay Use #11 blade ply cut slot bottom use Swingee guide cut top sides snug fit Cut pair spruce blocks -in long -in strip Trim match Swingee thickness Insert Swingee glue blocks ply form front portion slot sides Remove Swingee Cap strip Of/16 ply complete slot Drill /i6in holes through center ply Swingee hinge line close struc ture drop CyA holes secure taking care avoid bonding moving parts Shim /6-in drill bit drill slot 30 Model Aviation Left Ribs 1-Bare shaped Permagritfile balsa rectangies clamped between plywood templates RO R9 Spruce spars butt-join sheeting eilminating rib notches Above Wing builds flatno dihedral Ribs notched stock-size beveied trail Ing edge also used ailerons Ribs flrsttacked spar CyA one glued sheeting CyA Left An aluminum bracket secures servo rails 1/16-in ball links offset output holes provide aileron differential Right brass strip around Swingee arm receives metal clevis Swingee blocked lnwith spruce ply glued CyA Left OptIonal 1/64 ply coversthe alieron gap thlsvlew underside slit rubbercement bead added cementcures acts hinge slit cracked Right Wing fairing has ply core balsa planking Hatch slides beneath streamlining Len I apered aluminum hold-downa secured wing part secret about wing held two visible screw heads Right author launches Buzzbat another flight Low drag makes ship good performer light winds aileron arm straight forward aileron neutral Use 1/64 ply shim up slot necessary Most type hinge Radio South etc good other locations -in-wide brass strip crimp Ufittings around Swingee arm threads Trim smooth matched pair Out 344 U-fitting make hole clevis pin sized neither bind sioppy Place close possible arms maximum deflection Use metal clevis keeper instead nylon type Aileron trimming will made rotation entire pushrod ball socket end Zap-glue ribs atime spar sheeting maintaining pressure against rib bottoms Check rib fronts tops straightedge sand down build up necessary achieve uniformity Put 1/16 balsa doubler front center bottom sheeting splice wing halves together Add 1/16 sheeting over tops RO ribs splice top center sheeting Cut add vertical webbing sub-leading edge Cut 1/16 ply braces go wing bottom under top sheeting Trim Y16-in ribs forward webbing glue brace flush work surface Rejoin sectioned ribs TS bracing Add block through sheeting attach front hold-down screw block must sufficient size/strength screw get good bite supports models weight G-forces Add top spar sheeting rear brace Add shape leading edge Fit glue 1/34 ply plate rear aluminum hold-down fastens Drill Continued page 117 March 1986 31 Letters Editor Continued page 12 authorized report Bills demise George L Eaton AKA CS Verral now holds copyrights Bills future Bill Barnes killed automobile ac cident No way next thing know will try tell Glenn Miller killed plane crash Bill Barnes lives Bud Overn Santa Ana CA Great men like Barnes legends Bill seen gas station Elcino Lake Charles Nats Safeway super market North Platte Truth must faced fateful day 1952 great pilot foolishly ventured out red Volks wagen van near-hurricane conditions demise covered up CIA due planned highly-sensitive mission Near East could have brought lasting peace region New York Times reluctantly deleted obit Since Frank Tinsley retired happy mayor New England town friends hid news sad event would have broken heart Yes party New York town house reported pa pers Bud Ovem may aware Barnes identical twin perhaps thwarted Japanese Aleu tians Until secret file Pentagon declassffied lips sealed Shorty Sandy party might see things after happy consump tion colorless odorless liquid olives toothpicks butler whispered man New Yorker old times sake Russian-like liquid actually Barnes secret engine coolant drained through loaves white bread Pepperidge family size stood end remove toxic agent Perhaps will news Bud real Sandy always wore green silk shirt first three buttons open reveal tatoo Stormer Sandy wore polka-dot tie nightdoesnt square Having visited soft-spoken FBI type still-secret file can say no EditorPublisher Wheeley has firmly advised same operator publish another word about Barnes case closed Since personally edited Chuck Ver rals copy George L Eaton will sign affidavit Chuck shared chore alternate-month basis Harold Mon tanye Bud Overn Chuck others will remiss Monty forgotten pal Bill playing tennis Gosh Chuck cant tell brothers apart Bill Winter Fairfax VA Buzzbat Continued page 31 hole 4-40 blind nut near plate front dead center wing Make rear hold-down bends somewhat rounded available use tempered aircraft-type aluminum Center punch bent ends out about Y16 drill %2-in holes Tap 4-40 threads Temporarily attach hold-down set wing position saddle Mark hole fuselage bottom drilled Repeat front hold-down foot bent forward accommodate servo locate front hole making template scrap balsa match hold-down hole spacing Lay template fuselage bottom mark Drill holes fuselage resting firmly block making final installation hold-downs glue notched ply plates wing around cant rotate Extend bottom sheeting toward aileron servo minimize open area enclosed fuselage Cut x 1in piece -in birch ply glue centered inside extend over ply plate adjacent bottom sheeting Drill through 4-40 blind nut Attach -in balsa vertical crosspiece aft servo Add TS places ply plate other bottom sheeting meets other Continued page 120 March1986 117 K responding advertisers mention read about Model Aviation DALLAIRE SPORTSTER SPECIFICATIONS Wing Span 72 Inches Wing Chord 11 Inches Power 21-30 Engine Radio 3 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware %$OLD TIMER Rt 1 Box 190 a MS 38754 Telephone 601 2473578 Buzzbat Continued page 117 structural members common damage bad landing piy plates breaking away Add remaining top center sheeting cap strips ex treme tips ply facing wing faking can shaped tack-glued hatch rear broken away glued leading edge wing mounted remainder faking fitted Magic Model Filler can smooth everything out Temporarily add 6-in seating tape adding facingto get good merge between hatch fairing Aileron servo installation Rails glued inside inboard RO ribs po sitioned center servo output wheel vertically cavity metal bracket screws over servo case under side cutout sheeting over servo wheel gives /1-in space Butt servo bottom against rear brace flopped cable best clears front hold-down Aileron differential up down provided placing Yie-in ball links offset holes output wheel Try 450 get least twice much up down avoid adverse yaw Use hole radius least /16 get enough aileron movement Servo-to Swingee linkup plans show applies small white Swingee control wire will run high low ball links side wheel builder dark opposing Swingees used both ball links can top bottom wheel preferably bottom easier access Study servo rotation corresponding Swingee action planes rear radio observe whats happening As turns linear movement up-aileron must greater Tape ailerons neutral Mark cut paths holes pushrod wires through ribs Use coupler suf ficient threads adjustments solder coupler wire aileron end Put metal clevis centered threads use keeper radio output wheel neutral sockets couplers mark wires cut servo end go deep couplers Cut epoxy wires couplers avoid bonding Swingee parts secure rear portions CyA dropped through small holes made balsa Optional aileron gap covers An idea better gap covers referred plans came after plans inked After covered allerons installed cut -in-wide strip thin rigid plastic 3 mil clear drafting Mylar excellent attach -in-wide double-sticky clear Scotch tape can external under covering wing low heat used Static electricity requires clean environ ment following steps First tape -in strip cutto length work sufface bits black tape placed edge stretch care fully lower position length doublesticky tape accurately other long edge some excess both ends Remove black tape Holding excess ends carefully position over gap slowly lower position Trim excess Finishing various tex coverings bear up better fuselage unrein forced films single 8-in-wide piece can fuselage Make overlaps forward fm around nose Alter fuselage covered protect raw edges around bolt holes large washer eyelet bushing broad flange #5 Dritz Mighty Snaps packet size 24 sewing outlets contains posts well-suited application Put -in dense latex foam Ace Sig etc around three sides fronts battery receiver hatch underside can hollowed out necessary Run antenna down fuselage -in balsa stick typical switch harness nuis ance install since full charge should give three four hours operation battery-to-receiver adapter practical alternative Balance trim saddle cut conform plans wing has 10 incidence Balanced out stab 0-0 little tendency bailcon ship must flown out its heading Use 450 500 mAh pack Vie-in sheet lead squares forward battery balancing necessary Balancing point shown plans enough stab throw will permit gcod spins may fly too squirrely first low-time pilots youre experi enced pilot balance model begin spar trim elevator level flight Keep stab throw front about Ye way initially ship touchy pitch axis After familiarity may want increase throw obtain true spins tighter turns etc Use dual rate setting trans mitter available Tight spins possible adequate stab movement center gravity CG too far ward Some pictures show larger fin hampered spins fm size plans gives ample directional stabil ity akspeeds up tip walk experienced increase aileron differ ential bottom ballast used larger groinmets can adjusted vertically wing hold-downs hold lead onto fuse lage bottom sure sheet lead weights cut folded maintain desired balance point FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY 120 Model Aviation ONLY $4995 Atom Back Approx Wi 175 oz Displacement 09 Cu Bore-5 Stroke 5 Piston Steel Crank CaseMagnesium Alloy inal Crankshaft Bearing Silicon Bronze Cylinder- Chromally Steel Approx RPM -12000 Grey Cox 7 x 4 prop FOBLsAngebs cA cA residents add 6% Sales Tax Order Direct ATOM smallest Ignition engines ever produced Designed R Arden further developments John Morrill Simplex Engines Limited Production Run Delivery 10 12 weeks ARO will receive within 7 days order con firming postcard verify receipt order give assigned engine number ap proximate delivery date Morrill-ADC PO Box 1210 Simi Valley CA 93062
Edition: Model Aviation - 1986/03
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 117, 120
NO OCR TEXT NO OCR TEXT fuselage incorporates special nose construction essentially simple plywood box balsa added permit shaping oval cross section Solid balsa tall surfaces simplify construction airfoils sanded symmetrical sections offer desired low drag THIS 5-FT SLOPE SOARER can easily quickly built can tear across sky high-speed runs can perform aerobatic maneuvers two-channel controls Inside out side loops spins extended inverted flight horizontal vertical rolls inside outside tight vertical turns blistering dives abrupt pullouts high-speed passes kinds showy flight duck soup design distinctive racy appearance rugged highly functional especially clean single nut bolt screw dowel rubberband horn pushrod hangs out ailerons can gapless Swingee fittings used ailerons linkage internal servo tucked flat wing cavity hooked directly Swingees Ailerons hooked up operate differentially Turn ing response ailerons alone no rudder excellent especially tight upelevator given after banking model pushrod flying stab entirely internal passing through fin bellcrank crisp action reliable neutral wing cleanly attached via internal hold-downs Only two little bolt heads visible bottom However 5-ft span assembled model makes small package easily transported slope site ready-to-fly condition An all-up weight 26 oz results wing loading about 8 ozIsq ft pound sheet lead can added internally increase loading higher winds style flying like Buzzbat will saunter around peace fully light wind flying gets interesting lift strong enough downstick pressure used some real speed point youd best blink make diving pass may wonder went ConstructIon Youll need following materials Wood medium-density balsa unless otherwise specified 2 x 3 x 36 ribs Four 6 x spruce spars Two 36 sub-leading edge Two 36 leading edge Two 1 x 36 beveled 1/16 x ling edge stock TE ailerons 3 x hard balsa sparwebbingfrom center Rl wing tip undersides x 36 hatch underbelly 3 x soft fin decking top wing tips 3 x /16 x 36 hard spar webbing Rl R9 interior wing saddle x 36 fuselage doublers x 36 light C-grain stab Four triangular stock joining fuselage sides formers wing ribs dihedral braces misc Four 3 x 1/16 x 36 wing sheeting cap strips ard running antenna down fuselage Spruce x o mounting Birch ply 3/, ers nose center core 24 Model Aviation Hatch merges cleanly ins wing Tairing LomDnuu WEIn IlK um nuD ails provides good wind penetration Contour-type paint scheme adds aireauraleek appearance Birch ply 1/16 x 12 x 48 slab sides bottom braces part bottom sheeting misc Birch /32 ply inlays fin Birch . ply sub-decking aft rear former Music wire 1/16 support Aluminum tubing 1/16 ID stab Two 055 1/i. x 36 music wire aileron stab pushrods Four metal devises Six 2-56 threaded couplers pushrod ends Two Swingees smaller white Delrin type available -in *4 sheet metal screws attach front hold-down 4-40 blind nut attach rear hold-down Two aileron hinges one-piece types fine Three -in 4-40 bolts round heads Tap size 4-40 4-40 self-tapping screw Two Du-Bro A6-in threaded ball links/sockets Aluminum strip Yio x wing hold-downs preferably tempered aircraft aluminum Thin sheet metal tin can etc aileron servo bracket Nylon 1A6-in sheet Sig stab bellcrank Vinyl seating tape 1/16 x saddle Brass 016 sheet making U around Swingee arms Lead 1/16-in sheet ballasting optionai Fuselage Make matched pair 1/ p1y sides As shown up 500 mAhuncased square battery pack wrapped -in latex foam bottom sides can accommodated 450 niAh pack con figured plans will also fit Use root pattern mark wing saddle contour incidence shown front hold-down bent plans space left accept large elevator servo aft former servo plan use can go forward plans show bend hold-down fcot forward notching sides front crosspiece accord ingly front former should just wide enough accept elevator servo cross wise mounting ears 4-in rails Make formers glue side fuselage other inverting assembly gcod alignment Cut attach interior saddle pieces Cut -in ply center core nose noting fits Via-in below top sides Make matched pair spacers fit against sides join front end Glue spacers core trim screw head clearance Cut ply bottom mark centerline Cut 42 birch ply hold-down crosspieces width fuselage bot tom servo used small enough go forward former cut rectangle snugly accept sideways Depending other space needs setup may placed forward battery-toreceiver adapter could also used eliminate bulky wiring harness Add triangular stock TS inside edges fuselage except hatch aft fin front Join nose core/spacer assembly sides Glue bottom crosspieces compart ment divider optional Fin Cut out shape noting goes bottom sides Make bellcrank standard 500 mAh battery pack fits nose Battery-to-receiver adapter cable usea instead bulky switch harness Hatch slides off keys accurately fuselage Wing attaches two Alien-head bolts shown nere Dritz posts sewing Item recess bolt heads provide seats protecting bottom fuselage Swingee-operated ailerons eliminate external hardware Authn says youve never tried youve mimeed * tewlf dmvi Tavi dtaii tII wn Wing trailing edge ailerons included made standard beveled stock forsimplification keep parts fabrication minimum Sig nylon Use #40 bit %2-in wireanda#51 or#S2fortheclevisforno sloppiness binding Make belicrank cutout Trim away 1/32 around bellcrank fin bottom out about inlays go easiest accomplish before balsa sections glued together using inlays marking Add 1/16 ply doublers inlays main support wire Glue inlay Position other Yi6-in shim between make keying marks drill %2-in hole sewing thread spool hole shimmed down decreasing diameter pieces tubing makes good drilling guide Place bellcrank outsides drill series holes arc front stab connecting wire smooth out rough spots Mark path pushrod through fin align servo output arm common carpenters saw can used cut pushrod slot fin bottom pushrod can made 055 1/its-in wire threaded couplers ends threaded rods inserted Y16-in dowel Assemble pushrod lay fin slot Fill underneath balsa Run Yn-in support wire through Glue other inlay rechecking alignment free movement Use Zap cyanoacrylate CyA glue wire inlays Glue Cm fuselage side flush bottom trim TS front fin Clamp fin between sides eyeball shift fin needed eliminate built-in turning tendency ignore leaning Zap 1-in length 1/ cross-grained ply subdecking top just forward Cm secure positioning Glue fin other side let 26 Model Aviation Flying stab pivots rigid support actuated pushrod/bellcrank arrangement assures well-defined neutral Pivot location stab design avoid high-speed fiutter Fin sandwiches between tue ena Olin ply sides s slim extremely strong rear Stab roots fit cieaniy fiat sides ofthefin BUZ ZBAT 2 CHANNEL SLOPE SOARER DESIGNED BY HARLEY MICHAELIS /4 BALSA C NIRA BALSA FIN~CN 3/32 BALSA /64 PLY-DOUBLER 1/32 PLY BALSA OVER 1/16 PLY KEYHOLE PLATE /8 PLY CORE 3/16BALSA WEB 1/16 PLY BOTTOM 1/16 x /4I/B SUB L E SPRUCE SPARS 26 PLY WING BRACES BALSA N N - SWINGEE 1/16 WIRE BALSA TE STOCK ONE PIECE N CAP STRIPS N NN 1/16 BALSA SHEETING TOP BOTTOM N N N- N I/4x3/8 LE glue dry fin leans hold fuselage between knees twist 1-in sections /64 ply subdecking progres sively glued CyA Its good idea protect fingers backing iron-on covering CyA fires Install elevator servo complete pushrod rear former install crosspieces etc guide route pushrod clear hold-downs Finish Y64 ply subdecking sand corners make square box Add hard balsa pine nose core front underbelly Add sheet stock ply box structure shaping fuselage using lighter balsa rear Cut hatch block profile sides fuselage Glue Ys4 ply bottom edges hatch hold-down screw goes Fit dovetailed /s ply plate atop spacer blocks between sides hatch block position drill through mounting plate estab lish common centerline screw rear keyhole slot Set adjust screw hatch punch pinholes balsa around thoroughly reinforce area thin CyA glue Make keyhole slot plate glue place Add keying plate hatch rear underside Sand down ply box corners except along saddle edges Merge /16 ply along hatch area simultaneously shaping hatch razor plane flat Permagrit tool excellent aid forming nice oval cross sections Cut glue fm extension slightly above line stab Work fin generally symmetrical airfoil keep flat stab butts Stab Cut -in balsa preferably light medium C-grain stock Lay against fin correct position mark 3Az-in ID tubes go Cut snug slots press tubes Slip halves make snug slots /16-in ID tubing Shift stab halves slots until same plane aligned well wing saddle Use tiny drop CyA secure tubes position Remove add CyA fill around tubes epoxy putty etc Shape nice symmetrical airfoil thinning toward tips Reinforce I/IS BALSA SHEETING B BALSA B PLY WINGCAP STRIPS ARE NOT SHOWN TIP-DEE CROSS SECTON THIS PANEL FOR CLARITY AT RIGHT TIP 3/32 BALSA RIBS I- II/IBI/4WINGPLANTOPVI SPRUCE SRS I-7R-6P-SR-4R-3P-S I__ AILERON HINGE / //4 50 BALSA YE STOCK SWINGEE BALSA BIB NOTE MAKE PLY RIBO& ROOT AIRFOIL 9 10 STACK CUT 3/32 BALSA SPARTRIM 2 P0~REAR WING FAIRINGRIBS-REARDOUBLERr PLY FACE ROOTR-9R-O BALSA SHEETSADDLE /4 1/6 PLYEDGE BALSATRI STOCK I/IS PLY PLANKSI/ISB" PLYI/BI/B BALSA IBALSAFUSELADE3/IS BA IA-AI/S ~M SHAPE~SHEET _____B-B WING FAIRING DETAILPLY ________BALSA DETAILSEATING 1/16 PLY KEYHOLESPACER1/4 BALSAFORMERL15WING TAPE SOLID BALSAFLATBLOCKYRI-STOCIBPOF CHEEKSA TRECEIVER ABA AREA /8 BALSA SIDES TAPER DOWN TO REAP SLAB SIDE A-/ S/ BALSA WING 3/35 PLY SADDLE FUSELAGE FORMERS 1p-I-S/B _______ 3/35 PLY FORMERS 7-I/S 7-3/4~I/8LONuOC1-3/4FUSELAGE SIDEI-3/4 H/S --- 7 3/B OFF IIS-S/BPLY FAIRING4-40 BL SOLIDORENUTFORM BA I/B PLY____ _ - zmTF AREA 7JECES/ERTh bX__ SOLI BALSA SEERAIL HARD BALSA ORCROSS SECTIONS A-B-C OPTIONAL PINE CHEEKS1/4 TRI STOCKI/IS PLY BOTTOM harden thin edges application ofoutput pushrod clears holdthin CyAdowns Adjust stab 0-0 neutral Position stab servo adjust theis line bottom fuselage 1/83/B ALUM 4-40 TAP 1/4 BALSA TRI -STOCK SAND TO PLY HERE SPACER BLOCKSLAB SIDE--450 MIL I/B PLYPAK COREKkA-lJ HARD---BATT PAK BALSA CHEEK DETAIL NOSEBALSA Left shot interior saddle pieces already 1/16 ply sides joined farmers Ply nose core/spacer glued onto front end Right Bottom croaspieces 1/16 ply glued sides triangle stock added reinforcing hatch keying plate has already glued place Elevator servo recessed fuselage bottom will attached mounting rails 28 Model Aviation 80 Full-Size Plans Available. See Page 164 XJBLERS TO1/16 BALSA SHEETING1/4 3/8 BALSA1/32 PLY CORE B LICE SHEETS-.--TOP 16 BOTTOM-BUTTLEADING EDGEI/B BALSABALSA BLOCK WING nc m nonoSUB L ETIPS I--808-0 RO I6PLYIS~VOSPRUCE 50CK5 1/16 ANG RACESI/4WEBS TO 16 d/4PLYSLOTAS THICK AS THEN 3/16 TO /16BALSA SPRUCE SWINGEE 4 WING TI OSHSTRIPS LSA WEB SPARS NOTE GRAIN BRASS U 1/4 50 BALSA NDI/I6II-IR- /83--4R-S I/I6I/2R7SPAR RB8-I ENTER-~ S OR I/lB ALSA WIRE NOTCH - _ SWINGEE 1/16 PLY ON BOTTOMSIND NUT E S100 PLY DETAIL 4 PLY~ B DEcK C-C CCW ON RIGHT AlL SERVO LOW WIREBALSA T E STOCK REVERSE FOR CWI ONE PIECE OPTIONAL 1/64 PLY GAP COVER SEE TEXT 1/16 PLY WING BRACES NO DIHEDRAL _____/ /16 PLY_______________[11 IDES___________________________________II Ii 25 FINFILL SLOT LBOERr2WINGBRACESjJ PUSHRcIO WIRE/16 PLY BOTTOM 3/32 PLY WITH BALSAIdSTAB CROSSFORMS EXTERIOR SS PIECES SEC ONCONTOUR REARI/B BALSA DETAILC GRAIN /4/ALUMINUM1/64 TUBES ________1/4 BALSA FIN EXTERSION FIN FRONT 1/16 PLY ~JBLER 1/32 PLY FIN DOUBLER I/4\l ThI STOCK BETWEEN SLAB SIDES 3/ 2 1/16 LLASTNG OPTIONS1/16SHEET LEAD 9APPROX 40Z 0 EACH DEIJBLE LAY BETWEEN NOLD DOWNS NOTE 5157 YEFFECTU/4 BALSA C RADIO SIGNAL- RUN ANTENNA HIGHIIIGRAJN IN FUSELAGEIf4I III&BALSA T 1/4 BALSA FINFIL ERFill EXT CONTOURII1/32 PLY INLAY C-CEXTENSIONI 1/16 PLY DOUBLER / jI rqj ii-1/16 NYLON SOLID BALSAIII 111/16 SEE X-SECT BALSA 1/8 BALSA OVER 1/16 PLY SIDES MW PUSHROD SLOT FOR PUSH ROD THIN CLEVIS BALSA 0I23456 FUSELAGE BOTTOM TO FIT ELEV SERVO CASE PLY KEY HATCH IL RAILS ON RIBS BRACKET TO SECURE SERVO WINGDETAIL MODEL AVIATION BUZZBAT 2 CHANNEL SLOPE SOARER SPAN 60 LENGTH 39 AREA 4S0 SQIN DESIGNED BY HARLEY MICHAELIS AMA 32343 [SF ~ ACING BY 70E DEMARcO March 1986 29 ALL RIGHTS RESERVED Left cutout made f stab belicrank slotted underneath accommodate pushrod 3/32-in stab wire rigidlysupported inthe ply inlays/doublers shimmed Spool servesasa drill guide Right Thefin isgiuded totheslab sides 1/64 ply subdecking added top bottom form ply box rugged very light enclosed hardware greatly reduces drag Left Balsa planks blocks added ply fuselage box keyed hatch installed can shaped along rest fuselage Right Balsa sheeting worked razor plane sanding block oval cross sections ply box corners Keep working until nice sculptured shape achieved Model Magic Filler used author fix gaps dings make fillets Left 1/4-in vertical webs plywood braces blind nut have installed Servo railswlll capped balsa centerthe out put wheel vertically cavity Installing 3/16-In webbing out tips next Right Simple wing construction cuts buildIng time Wing flat Permagrit sanding tool especially useful forming rib templates /32 balsa ribs Make RO R9 templates 6 ply Use cut four RO ribs two R9 ribs Clamp eight rectangles balsa between RO R9 templates stack-shape Ri through R8 Reverse templates repeat pro cedure ribs other wing half Level rib tops andtrim /i-in off top edges innermost ROs forward wing brace Cut 6 x ce spars bottom sheeting Note sheeting extends forward -in-thick sub-leading edge Butt-glue spars sheeting except vertical front wing brace goes Trim /16-in sheeting allow brace Pin sheeting ribs work surface make line ball-point pen represent rear sub-leading edge Shape fit solid trailing edge TE stock extend out R5 rib stations Note underside trimmed outermost ROs inlaid /16 ply plate mini micro servo output wheel offset holes needed ailerons Space inboard RO ribs fit servo -in rails Cut -in-deep notches TE ends RO R4 Trim ribs accord ingly Pin TE place 46-in shim strip under RO-R4 ribs Zap TE front aileron line pin down 6in strip fairly hard balsa -in balsa spar strip hinging will later added rear half now glue ribs R5 out piece Cut deep notches spar strip ribs Bevel spar strip match airfoil glue Swingees should handpicked ones move freely have minimum slop piness arm other parts held flat install glue wide strip /16 ply use /32 ply thicker Swingee onto -in balsa aile ron mounting strip aligning against spar front between ribs Swingee will lay Use #11 blade ply cut slot bottom use Swingee guide cut top sides snug fit Cut pair spruce blocks -in long -in strip Trim match Swingee thickness Insert Swingee glue blocks ply form front portion slot sides Remove Swingee Cap strip Of/16 ply complete slot Drill /i6in holes through center ply Swingee hinge line close struc ture drop CyA holes secure taking care avoid bonding moving parts Shim /6-in drill bit drill slot 30 Model Aviation Left Ribs 1-Bare shaped Permagritfile balsa rectangies clamped between plywood templates RO R9 Spruce spars butt-join sheeting eilminating rib notches Above Wing builds flatno dihedral Ribs notched stock-size beveied trail Ing edge also used ailerons Ribs flrsttacked spar CyA one glued sheeting CyA Left An aluminum bracket secures servo rails 1/16-in ball links offset output holes provide aileron differential Right brass strip around Swingee arm receives metal clevis Swingee blocked lnwith spruce ply glued CyA Left OptIonal 1/64 ply coversthe alieron gap thlsvlew underside slit rubbercement bead added cementcures acts hinge slit cracked Right Wing fairing has ply core balsa planking Hatch slides beneath streamlining Len I apered aluminum hold-downa secured wing part secret about wing held two visible screw heads Right author launches Buzzbat another flight Low drag makes ship good performer light winds aileron arm straight forward aileron neutral Use 1/64 ply shim up slot necessary Most type hinge Radio South etc good other locations -in-wide brass strip crimp Ufittings around Swingee arm threads Trim smooth matched pair Out 344 U-fitting make hole clevis pin sized neither bind sioppy Place close possible arms maximum deflection Use metal clevis keeper instead nylon type Aileron trimming will made rotation entire pushrod ball socket end Zap-glue ribs atime spar sheeting maintaining pressure against rib bottoms Check rib fronts tops straightedge sand down build up necessary achieve uniformity Put 1/16 balsa doubler front center bottom sheeting splice wing halves together Add 1/16 sheeting over tops RO ribs splice top center sheeting Cut add vertical webbing sub-leading edge Cut 1/16 ply braces go wing bottom under top sheeting Trim Y16-in ribs forward webbing glue brace flush work surface Rejoin sectioned ribs TS bracing Add block through sheeting attach front hold-down screw block must sufficient size/strength screw get good bite supports models weight G-forces Add top spar sheeting rear brace Add shape leading edge Fit glue 1/34 ply plate rear aluminum hold-down fastens Drill Continued page 117 March 1986 31 Letters Editor Continued page 12 authorized report Bills demise George L Eaton AKA CS Verral now holds copyrights Bills future Bill Barnes killed automobile ac cident No way next thing know will try tell Glenn Miller killed plane crash Bill Barnes lives Bud Overn Santa Ana CA Great men like Barnes legends Bill seen gas station Elcino Lake Charles Nats Safeway super market North Platte Truth must faced fateful day 1952 great pilot foolishly ventured out red Volks wagen van near-hurricane conditions demise covered up CIA due planned highly-sensitive mission Near East could have brought lasting peace region New York Times reluctantly deleted obit Since Frank Tinsley retired happy mayor New England town friends hid news sad event would have broken heart Yes party New York town house reported pa pers Bud Ovem may aware Barnes identical twin perhaps thwarted Japanese Aleu tians Until secret file Pentagon declassffied lips sealed Shorty Sandy party might see things after happy consump tion colorless odorless liquid olives toothpicks butler whispered man New Yorker old times sake Russian-like liquid actually Barnes secret engine coolant drained through loaves white bread Pepperidge family size stood end remove toxic agent Perhaps will news Bud real Sandy always wore green silk shirt first three buttons open reveal tatoo Stormer Sandy wore polka-dot tie nightdoesnt square Having visited soft-spoken FBI type still-secret file can say no EditorPublisher Wheeley has firmly advised same operator publish another word about Barnes case closed Since personally edited Chuck Ver rals copy George L Eaton will sign affidavit Chuck shared chore alternate-month basis Harold Mon tanye Bud Overn Chuck others will remiss Monty forgotten pal Bill playing tennis Gosh Chuck cant tell brothers apart Bill Winter Fairfax VA Buzzbat Continued page 31 hole 4-40 blind nut near plate front dead center wing Make rear hold-down bends somewhat rounded available use tempered aircraft-type aluminum Center punch bent ends out about Y16 drill %2-in holes Tap 4-40 threads Temporarily attach hold-down set wing position saddle Mark hole fuselage bottom drilled Repeat front hold-down foot bent forward accommodate servo locate front hole making template scrap balsa match hold-down hole spacing Lay template fuselage bottom mark Drill holes fuselage resting firmly block making final installation hold-downs glue notched ply plates wing around cant rotate Extend bottom sheeting toward aileron servo minimize open area enclosed fuselage Cut x 1in piece -in birch ply glue centered inside extend over ply plate adjacent bottom sheeting Drill through 4-40 blind nut Attach -in balsa vertical crosspiece aft servo Add TS places ply plate other bottom sheeting meets other Continued page 120 March1986 117 K responding advertisers mention read about Model Aviation DALLAIRE SPORTSTER SPECIFICATIONS Wing Span 72 Inches Wing Chord 11 Inches Power 21-30 Engine Radio 3 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware %$OLD TIMER Rt 1 Box 190 a MS 38754 Telephone 601 2473578 Buzzbat Continued page 117 structural members common damage bad landing piy plates breaking away Add remaining top center sheeting cap strips ex treme tips ply facing wing faking can shaped tack-glued hatch rear broken away glued leading edge wing mounted remainder faking fitted Magic Model Filler can smooth everything out Temporarily add 6-in seating tape adding facingto get good merge between hatch fairing Aileron servo installation Rails glued inside inboard RO ribs po sitioned center servo output wheel vertically cavity metal bracket screws over servo case under side cutout sheeting over servo wheel gives /1-in space Butt servo bottom against rear brace flopped cable best clears front hold-down Aileron differential up down provided placing Yie-in ball links offset holes output wheel Try 450 get least twice much up down avoid adverse yaw Use hole radius least /16 get enough aileron movement Servo-to Swingee linkup plans show applies small white Swingee control wire will run high low ball links side wheel builder dark opposing Swingees used both ball links can top bottom wheel preferably bottom easier access Study servo rotation corresponding Swingee action planes rear radio observe whats happening As turns linear movement up-aileron must greater Tape ailerons neutral Mark cut paths holes pushrod wires through ribs Use coupler suf ficient threads adjustments solder coupler wire aileron end Put metal clevis centered threads use keeper radio output wheel neutral sockets couplers mark wires cut servo end go deep couplers Cut epoxy wires couplers avoid bonding Swingee parts secure rear portions CyA dropped through small holes made balsa Optional aileron gap covers An idea better gap covers referred plans came after plans inked After covered allerons installed cut -in-wide strip thin rigid plastic 3 mil clear drafting Mylar excellent attach -in-wide double-sticky clear Scotch tape can external under covering wing low heat used Static electricity requires clean environ ment following steps First tape -in strip cutto length work sufface bits black tape placed edge stretch care fully lower position length doublesticky tape accurately other long edge some excess both ends Remove black tape Holding excess ends carefully position over gap slowly lower position Trim excess Finishing various tex coverings bear up better fuselage unrein forced films single 8-in-wide piece can fuselage Make overlaps forward fm around nose Alter fuselage covered protect raw edges around bolt holes large washer eyelet bushing broad flange #5 Dritz Mighty Snaps packet size 24 sewing outlets contains posts well-suited application Put -in dense latex foam Ace Sig etc around three sides fronts battery receiver hatch underside can hollowed out necessary Run antenna down fuselage -in balsa stick typical switch harness nuis ance install since full charge should give three four hours operation battery-to-receiver adapter practical alternative Balance trim saddle cut conform plans wing has 10 incidence Balanced out stab 0-0 little tendency bailcon ship must flown out its heading Use 450 500 mAh pack Vie-in sheet lead squares forward battery balancing necessary Balancing point shown plans enough stab throw will permit gcod spins may fly too squirrely first low-time pilots youre experi enced pilot balance model begin spar trim elevator level flight Keep stab throw front about Ye way initially ship touchy pitch axis After familiarity may want increase throw obtain true spins tighter turns etc Use dual rate setting trans mitter available Tight spins possible adequate stab movement center gravity CG too far ward Some pictures show larger fin hampered spins fm size plans gives ample directional stabil ity akspeeds up tip walk experienced increase aileron differ ential bottom ballast used larger groinmets can adjusted vertically wing hold-downs hold lead onto fuse lage bottom sure sheet lead weights cut folded maintain desired balance point FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY 120 Model Aviation ONLY $4995 Atom Back Approx Wi 175 oz Displacement 09 Cu Bore-5 Stroke 5 Piston Steel Crank CaseMagnesium Alloy inal Crankshaft Bearing Silicon Bronze Cylinder- Chromally Steel Approx RPM -12000 Grey Cox 7 x 4 prop FOBLsAngebs cA cA residents add 6% Sales Tax Order Direct ATOM smallest Ignition engines ever produced Designed R Arden further developments John Morrill Simplex Engines Limited Production Run Delivery 10 12 weeks ARO will receive within 7 days order con firming postcard verify receipt order give assigned engine number ap proximate delivery date Morrill-ADC PO Box 1210 Simi Valley CA 93062
Edition: Model Aviation - 1986/03
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 117, 120
NO OCR TEXT NO OCR TEXT fuselage incorporates special nose construction essentially simple plywood box balsa added permit shaping oval cross section Solid balsa tall surfaces simplify construction airfoils sanded symmetrical sections offer desired low drag THIS 5-FT SLOPE SOARER can easily quickly built can tear across sky high-speed runs can perform aerobatic maneuvers two-channel controls Inside out side loops spins extended inverted flight horizontal vertical rolls inside outside tight vertical turns blistering dives abrupt pullouts high-speed passes kinds showy flight duck soup design distinctive racy appearance rugged highly functional especially clean single nut bolt screw dowel rubberband horn pushrod hangs out ailerons can gapless Swingee fittings used ailerons linkage internal servo tucked flat wing cavity hooked directly Swingees Ailerons hooked up operate differentially Turn ing response ailerons alone no rudder excellent especially tight upelevator given after banking model pushrod flying stab entirely internal passing through fin bellcrank crisp action reliable neutral wing cleanly attached via internal hold-downs Only two little bolt heads visible bottom However 5-ft span assembled model makes small package easily transported slope site ready-to-fly condition An all-up weight 26 oz results wing loading about 8 ozIsq ft pound sheet lead can added internally increase loading higher winds style flying like Buzzbat will saunter around peace fully light wind flying gets interesting lift strong enough downstick pressure used some real speed point youd best blink make diving pass may wonder went ConstructIon Youll need following materials Wood medium-density balsa unless otherwise specified 2 x 3 x 36 ribs Four 6 x spruce spars Two 36 sub-leading edge Two 36 leading edge Two 1 x 36 beveled 1/16 x ling edge stock TE ailerons 3 x hard balsa sparwebbingfrom center Rl wing tip undersides x 36 hatch underbelly 3 x soft fin decking top wing tips 3 x /16 x 36 hard spar webbing Rl R9 interior wing saddle x 36 fuselage doublers x 36 light C-grain stab Four triangular stock joining fuselage sides formers wing ribs dihedral braces misc Four 3 x 1/16 x 36 wing sheeting cap strips ard running antenna down fuselage Spruce x o mounting Birch ply 3/, ers nose center core 24 Model Aviation Hatch merges cleanly ins wing Tairing LomDnuu WEIn IlK um nuD ails provides good wind penetration Contour-type paint scheme adds aireauraleek appearance Birch ply 1/16 x 12 x 48 slab sides bottom braces part bottom sheeting misc Birch /32 ply inlays fin Birch . ply sub-decking aft rear former Music wire 1/16 support Aluminum tubing 1/16 ID stab Two 055 1/i. x 36 music wire aileron stab pushrods Four metal devises Six 2-56 threaded couplers pushrod ends Two Swingees smaller white Delrin type available -in *4 sheet metal screws attach front hold-down 4-40 blind nut attach rear hold-down Two aileron hinges one-piece types fine Three -in 4-40 bolts round heads Tap size 4-40 4-40 self-tapping screw Two Du-Bro A6-in threaded ball links/sockets Aluminum strip Yio x wing hold-downs preferably tempered aircraft aluminum Thin sheet metal tin can etc aileron servo bracket Nylon 1A6-in sheet Sig stab bellcrank Vinyl seating tape 1/16 x saddle Brass 016 sheet making U around Swingee arms Lead 1/16-in sheet ballasting optionai Fuselage Make matched pair 1/ p1y sides As shown up 500 mAhuncased square battery pack wrapped -in latex foam bottom sides can accommodated 450 niAh pack con figured plans will also fit Use root pattern mark wing saddle contour incidence shown front hold-down bent plans space left accept large elevator servo aft former servo plan use can go forward plans show bend hold-down fcot forward notching sides front crosspiece accord ingly front former should just wide enough accept elevator servo cross wise mounting ears 4-in rails Make formers glue side fuselage other inverting assembly gcod alignment Cut attach interior saddle pieces Cut -in ply center core nose noting fits Via-in below top sides Make matched pair spacers fit against sides join front end Glue spacers core trim screw head clearance Cut ply bottom mark centerline Cut 42 birch ply hold-down crosspieces width fuselage bot tom servo used small enough go forward former cut rectangle snugly accept sideways Depending other space needs setup may placed forward battery-toreceiver adapter could also used eliminate bulky wiring harness Add triangular stock TS inside edges fuselage except hatch aft fin front Join nose core/spacer assembly sides Glue bottom crosspieces compart ment divider optional Fin Cut out shape noting goes bottom sides Make bellcrank standard 500 mAh battery pack fits nose Battery-to-receiver adapter cable usea instead bulky switch harness Hatch slides off keys accurately fuselage Wing attaches two Alien-head bolts shown nere Dritz posts sewing Item recess bolt heads provide seats protecting bottom fuselage Swingee-operated ailerons eliminate external hardware Authn says youve never tried youve mimeed * tewlf dmvi Tavi dtaii tII wn Wing trailing edge ailerons included made standard beveled stock forsimplification keep parts fabrication minimum Sig nylon Use #40 bit %2-in wireanda#51 or#S2fortheclevisforno sloppiness binding Make belicrank cutout Trim away 1/32 around bellcrank fin bottom out about inlays go easiest accomplish before balsa sections glued together using inlays marking Add 1/16 ply doublers inlays main support wire Glue inlay Position other Yi6-in shim between make keying marks drill %2-in hole sewing thread spool hole shimmed down decreasing diameter pieces tubing makes good drilling guide Place bellcrank outsides drill series holes arc front stab connecting wire smooth out rough spots Mark path pushrod through fin align servo output arm common carpenters saw can used cut pushrod slot fin bottom pushrod can made 055 1/its-in wire threaded couplers ends threaded rods inserted Y16-in dowel Assemble pushrod lay fin slot Fill underneath balsa Run Yn-in support wire through Glue other inlay rechecking alignment free movement Use Zap cyanoacrylate CyA glue wire inlays Glue Cm fuselage side flush bottom trim TS front fin Clamp fin between sides eyeball shift fin needed eliminate built-in turning tendency ignore leaning Zap 1-in length 1/ cross-grained ply subdecking top just forward Cm secure positioning Glue fin other side let 26 Model Aviation Flying stab pivots rigid support actuated pushrod/bellcrank arrangement assures well-defined neutral Pivot location stab design avoid high-speed fiutter Fin sandwiches between tue ena Olin ply sides s slim extremely strong rear Stab roots fit cieaniy fiat sides ofthefin BUZ ZBAT 2 CHANNEL SLOPE SOARER DESIGNED BY HARLEY MICHAELIS /4 BALSA C NIRA BALSA FIN~CN 3/32 BALSA /64 PLY-DOUBLER 1/32 PLY BALSA OVER 1/16 PLY KEYHOLE PLATE /8 PLY CORE 3/16BALSA WEB 1/16 PLY BOTTOM 1/16 x /4I/B SUB L E SPRUCE SPARS 26 PLY WING BRACES BALSA N N - SWINGEE 1/16 WIRE BALSA TE STOCK ONE PIECE N CAP STRIPS N NN 1/16 BALSA SHEETING TOP BOTTOM N N N- N I/4x3/8 LE glue dry fin leans hold fuselage between knees twist 1-in sections /64 ply subdecking progres sively glued CyA Its good idea protect fingers backing iron-on covering CyA fires Install elevator servo complete pushrod rear former install crosspieces etc guide route pushrod clear hold-downs Finish Y64 ply subdecking sand corners make square box Add hard balsa pine nose core front underbelly Add sheet stock ply box structure shaping fuselage using lighter balsa rear Cut hatch block profile sides fuselage Glue Ys4 ply bottom edges hatch hold-down screw goes Fit dovetailed /s ply plate atop spacer blocks between sides hatch block position drill through mounting plate estab lish common centerline screw rear keyhole slot Set adjust screw hatch punch pinholes balsa around thoroughly reinforce area thin CyA glue Make keyhole slot plate glue place Add keying plate hatch rear underside Sand down ply box corners except along saddle edges Merge /16 ply along hatch area simultaneously shaping hatch razor plane flat Permagrit tool excellent aid forming nice oval cross sections Cut glue fm extension slightly above line stab Work fin generally symmetrical airfoil keep flat stab butts Stab Cut -in balsa preferably light medium C-grain stock Lay against fin correct position mark 3Az-in ID tubes go Cut snug slots press tubes Slip halves make snug slots /16-in ID tubing Shift stab halves slots until same plane aligned well wing saddle Use tiny drop CyA secure tubes position Remove add CyA fill around tubes epoxy putty etc Shape nice symmetrical airfoil thinning toward tips Reinforce I/IS BALSA SHEETING B BALSA B PLY WINGCAP STRIPS ARE NOT SHOWN TIP-DEE CROSS SECTON THIS PANEL FOR CLARITY AT RIGHT TIP 3/32 BALSA RIBS I- II/IBI/4WINGPLANTOPVI SPRUCE SRS I-7R-6P-SR-4R-3P-S I__ AILERON HINGE / //4 50 BALSA YE STOCK SWINGEE BALSA BIB NOTE MAKE PLY RIBO& ROOT AIRFOIL 9 10 STACK CUT 3/32 BALSA SPARTRIM 2 P0~REAR WING FAIRINGRIBS-REARDOUBLERr PLY FACE ROOTR-9R-O BALSA SHEETSADDLE /4 1/6 PLYEDGE BALSATRI STOCK I/IS PLY PLANKSI/ISB" PLYI/BI/B BALSA IBALSAFUSELADE3/IS BA IA-AI/S ~M SHAPE~SHEET _____B-B WING FAIRING DETAILPLY ________BALSA DETAILSEATING 1/16 PLY KEYHOLESPACER1/4 BALSAFORMERL15WING TAPE SOLID BALSAFLATBLOCKYRI-STOCIBPOF CHEEKSA TRECEIVER ABA AREA /8 BALSA SIDES TAPER DOWN TO REAP SLAB SIDE A-/ S/ BALSA WING 3/35 PLY SADDLE FUSELAGE FORMERS 1p-I-S/B _______ 3/35 PLY FORMERS 7-I/S 7-3/4~I/8LONuOC1-3/4FUSELAGE SIDEI-3/4 H/S --- 7 3/B OFF IIS-S/BPLY FAIRING4-40 BL SOLIDORENUTFORM BA I/B PLY____ _ - zmTF AREA 7JECES/ERTh bX__ SOLI BALSA SEERAIL HARD BALSA ORCROSS SECTIONS A-B-C OPTIONAL PINE CHEEKS1/4 TRI STOCKI/IS PLY BOTTOM harden thin edges application ofoutput pushrod clears holdthin CyAdowns Adjust stab 0-0 neutral Position stab servo adjust theis line bottom fuselage 1/83/B ALUM 4-40 TAP 1/4 BALSA TRI -STOCK SAND TO PLY HERE SPACER BLOCKSLAB SIDE--450 MIL I/B PLYPAK COREKkA-lJ HARD---BATT PAK BALSA CHEEK DETAIL NOSEBALSA Left shot interior saddle pieces already 1/16 ply sides joined farmers Ply nose core/spacer glued onto front end Right Bottom croaspieces 1/16 ply glued sides triangle stock added reinforcing hatch keying plate has already glued place Elevator servo recessed fuselage bottom will attached mounting rails 28 Model Aviation 80 Full-Size Plans Available. See Page 164 XJBLERS TO1/16 BALSA SHEETING1/4 3/8 BALSA1/32 PLY CORE B LICE SHEETS-.--TOP 16 BOTTOM-BUTTLEADING EDGEI/B BALSABALSA BLOCK WING nc m nonoSUB L ETIPS I--808-0 RO I6PLYIS~VOSPRUCE 50CK5 1/16 ANG RACESI/4WEBS TO 16 d/4PLYSLOTAS THICK AS THEN 3/16 TO /16BALSA SPRUCE SWINGEE 4 WING TI OSHSTRIPS LSA WEB SPARS NOTE GRAIN BRASS U 1/4 50 BALSA NDI/I6II-IR- /83--4R-S I/I6I/2R7SPAR RB8-I ENTER-~ S OR I/lB ALSA WIRE NOTCH - _ SWINGEE 1/16 PLY ON BOTTOMSIND NUT E S100 PLY DETAIL 4 PLY~ B DEcK C-C CCW ON RIGHT AlL SERVO LOW WIREBALSA T E STOCK REVERSE FOR CWI ONE PIECE OPTIONAL 1/64 PLY GAP COVER SEE TEXT 1/16 PLY WING BRACES NO DIHEDRAL _____/ /16 PLY_______________[11 IDES___________________________________II Ii 25 FINFILL SLOT LBOERr2WINGBRACESjJ PUSHRcIO WIRE/16 PLY BOTTOM 3/32 PLY WITH BALSAIdSTAB CROSSFORMS EXTERIOR SS PIECES SEC ONCONTOUR REARI/B BALSA DETAILC GRAIN /4/ALUMINUM1/64 TUBES ________1/4 BALSA FIN EXTERSION FIN FRONT 1/16 PLY ~JBLER 1/32 PLY FIN DOUBLER I/4\l ThI STOCK BETWEEN SLAB SIDES 3/ 2 1/16 LLASTNG OPTIONS1/16SHEET LEAD 9APPROX 40Z 0 EACH DEIJBLE LAY BETWEEN NOLD DOWNS NOTE 5157 YEFFECTU/4 BALSA C RADIO SIGNAL- RUN ANTENNA HIGHIIIGRAJN IN FUSELAGEIf4I III&BALSA T 1/4 BALSA FINFIL ERFill EXT CONTOURII1/32 PLY INLAY C-CEXTENSIONI 1/16 PLY DOUBLER / jI rqj ii-1/16 NYLON SOLID BALSAIII 111/16 SEE X-SECT BALSA 1/8 BALSA OVER 1/16 PLY SIDES MW PUSHROD SLOT FOR PUSH ROD THIN CLEVIS BALSA 0I23456 FUSELAGE BOTTOM TO FIT ELEV SERVO CASE PLY KEY HATCH IL RAILS ON RIBS BRACKET TO SECURE SERVO WINGDETAIL MODEL AVIATION BUZZBAT 2 CHANNEL SLOPE SOARER SPAN 60 LENGTH 39 AREA 4S0 SQIN DESIGNED BY HARLEY MICHAELIS AMA 32343 [SF ~ ACING BY 70E DEMARcO March 1986 29 ALL RIGHTS RESERVED Left cutout made f stab belicrank slotted underneath accommodate pushrod 3/32-in stab wire rigidlysupported inthe ply inlays/doublers shimmed Spool servesasa drill guide Right Thefin isgiuded totheslab sides 1/64 ply subdecking added top bottom form ply box rugged very light enclosed hardware greatly reduces drag Left Balsa planks blocks added ply fuselage box keyed hatch installed can shaped along rest fuselage Right Balsa sheeting worked razor plane sanding block oval cross sections ply box corners Keep working until nice sculptured shape achieved Model Magic Filler used author fix gaps dings make fillets Left 1/4-in vertical webs plywood braces blind nut have installed Servo railswlll capped balsa centerthe out put wheel vertically cavity Installing 3/16-In webbing out tips next Right Simple wing construction cuts buildIng time Wing flat Permagrit sanding tool especially useful forming rib templates /32 balsa ribs Make RO R9 templates 6 ply Use cut four RO ribs two R9 ribs Clamp eight rectangles balsa between RO R9 templates stack-shape Ri through R8 Reverse templates repeat pro cedure ribs other wing half Level rib tops andtrim /i-in off top edges innermost ROs forward wing brace Cut 6 x ce spars bottom sheeting Note sheeting extends forward -in-thick sub-leading edge Butt-glue spars sheeting except vertical front wing brace goes Trim /16-in sheeting allow brace Pin sheeting ribs work surface make line ball-point pen represent rear sub-leading edge Shape fit solid trailing edge TE stock extend out R5 rib stations Note underside trimmed outermost ROs inlaid /16 ply plate mini micro servo output wheel offset holes needed ailerons Space inboard RO ribs fit servo -in rails Cut -in-deep notches TE ends RO R4 Trim ribs accord ingly Pin TE place 46-in shim strip under RO-R4 ribs Zap TE front aileron line pin down 6in strip fairly hard balsa -in balsa spar strip hinging will later added rear half now glue ribs R5 out piece Cut deep notches spar strip ribs Bevel spar strip match airfoil glue Swingees should handpicked ones move freely have minimum slop piness arm other parts held flat install glue wide strip /16 ply use /32 ply thicker Swingee onto -in balsa aile ron mounting strip aligning against spar front between ribs Swingee will lay Use #11 blade ply cut slot bottom use Swingee guide cut top sides snug fit Cut pair spruce blocks -in long -in strip Trim match Swingee thickness Insert Swingee glue blocks ply form front portion slot sides Remove Swingee Cap strip Of/16 ply complete slot Drill /i6in holes through center ply Swingee hinge line close struc ture drop CyA holes secure taking care avoid bonding moving parts Shim /6-in drill bit drill slot 30 Model Aviation Left Ribs 1-Bare shaped Permagritfile balsa rectangies clamped between plywood templates RO R9 Spruce spars butt-join sheeting eilminating rib notches Above Wing builds flatno dihedral Ribs notched stock-size beveied trail Ing edge also used ailerons Ribs flrsttacked spar CyA one glued sheeting CyA Left An aluminum bracket secures servo rails 1/16-in ball links offset output holes provide aileron differential Right brass strip around Swingee arm receives metal clevis Swingee blocked lnwith spruce ply glued CyA Left OptIonal 1/64 ply coversthe alieron gap thlsvlew underside slit rubbercement bead added cementcures acts hinge slit cracked Right Wing fairing has ply core balsa planking Hatch slides beneath streamlining Len I apered aluminum hold-downa secured wing part secret about wing held two visible screw heads Right author launches Buzzbat another flight Low drag makes ship good performer light winds aileron arm straight forward aileron neutral Use 1/64 ply shim up slot necessary Most type hinge Radio South etc good other locations -in-wide brass strip crimp Ufittings around Swingee arm threads Trim smooth matched pair Out 344 U-fitting make hole clevis pin sized neither bind sioppy Place close possible arms maximum deflection Use metal clevis keeper instead nylon type Aileron trimming will made rotation entire pushrod ball socket end Zap-glue ribs atime spar sheeting maintaining pressure against rib bottoms Check rib fronts tops straightedge sand down build up necessary achieve uniformity Put 1/16 balsa doubler front center bottom sheeting splice wing halves together Add 1/16 sheeting over tops RO ribs splice top center sheeting Cut add vertical webbing sub-leading edge Cut 1/16 ply braces go wing bottom under top sheeting Trim Y16-in ribs forward webbing glue brace flush work surface Rejoin sectioned ribs TS bracing Add block through sheeting attach front hold-down screw block must sufficient size/strength screw get good bite supports models weight G-forces Add top spar sheeting rear brace Add shape leading edge Fit glue 1/34 ply plate rear aluminum hold-down fastens Drill Continued page 117 March 1986 31 Letters Editor Continued page 12 authorized report Bills demise George L Eaton AKA CS Verral now holds copyrights Bills future Bill Barnes killed automobile ac cident No way next thing know will try tell Glenn Miller killed plane crash Bill Barnes lives Bud Overn Santa Ana CA Great men like Barnes legends Bill seen gas station Elcino Lake Charles Nats Safeway super market North Platte Truth must faced fateful day 1952 great pilot foolishly ventured out red Volks wagen van near-hurricane conditions demise covered up CIA due planned highly-sensitive mission Near East could have brought lasting peace region New York Times reluctantly deleted obit Since Frank Tinsley retired happy mayor New England town friends hid news sad event would have broken heart Yes party New York town house reported pa pers Bud Ovem may aware Barnes identical twin perhaps thwarted Japanese Aleu tians Until secret file Pentagon declassffied lips sealed Shorty Sandy party might see things after happy consump tion colorless odorless liquid olives toothpicks butler whispered man New Yorker old times sake Russian-like liquid actually Barnes secret engine coolant drained through loaves white bread Pepperidge family size stood end remove toxic agent Perhaps will news Bud real Sandy always wore green silk shirt first three buttons open reveal tatoo Stormer Sandy wore polka-dot tie nightdoesnt square Having visited soft-spoken FBI type still-secret file can say no EditorPublisher Wheeley has firmly advised same operator publish another word about Barnes case closed Since personally edited Chuck Ver rals copy George L Eaton will sign affidavit Chuck shared chore alternate-month basis Harold Mon tanye Bud Overn Chuck others will remiss Monty forgotten pal Bill playing tennis Gosh Chuck cant tell brothers apart Bill Winter Fairfax VA Buzzbat Continued page 31 hole 4-40 blind nut near plate front dead center wing Make rear hold-down bends somewhat rounded available use tempered aircraft-type aluminum Center punch bent ends out about Y16 drill %2-in holes Tap 4-40 threads Temporarily attach hold-down set wing position saddle Mark hole fuselage bottom drilled Repeat front hold-down foot bent forward accommodate servo locate front hole making template scrap balsa match hold-down hole spacing Lay template fuselage bottom mark Drill holes fuselage resting firmly block making final installation hold-downs glue notched ply plates wing around cant rotate Extend bottom sheeting toward aileron servo minimize open area enclosed fuselage Cut x 1in piece -in birch ply glue centered inside extend over ply plate adjacent bottom sheeting Drill through 4-40 blind nut Attach -in balsa vertical crosspiece aft servo Add TS places ply plate other bottom sheeting meets other Continued page 120 March1986 117 K responding advertisers mention read about Model Aviation DALLAIRE SPORTSTER SPECIFICATIONS Wing Span 72 Inches Wing Chord 11 Inches Power 21-30 Engine Radio 3 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware %$OLD TIMER Rt 1 Box 190 a MS 38754 Telephone 601 2473578 Buzzbat Continued page 117 structural members common damage bad landing piy plates breaking away Add remaining top center sheeting cap strips ex treme tips ply facing wing faking can shaped tack-glued hatch rear broken away glued leading edge wing mounted remainder faking fitted Magic Model Filler can smooth everything out Temporarily add 6-in seating tape adding facingto get good merge between hatch fairing Aileron servo installation Rails glued inside inboard RO ribs po sitioned center servo output wheel vertically cavity metal bracket screws over servo case under side cutout sheeting over servo wheel gives /1-in space Butt servo bottom against rear brace flopped cable best clears front hold-down Aileron differential up down provided placing Yie-in ball links offset holes output wheel Try 450 get least twice much up down avoid adverse yaw Use hole radius least /16 get enough aileron movement Servo-to Swingee linkup plans show applies small white Swingee control wire will run high low ball links side wheel builder dark opposing Swingees used both ball links can top bottom wheel preferably bottom easier access Study servo rotation corresponding Swingee action planes rear radio observe whats happening As turns linear movement up-aileron must greater Tape ailerons neutral Mark cut paths holes pushrod wires through ribs Use coupler suf ficient threads adjustments solder coupler wire aileron end Put metal clevis centered threads use keeper radio output wheel neutral sockets couplers mark wires cut servo end go deep couplers Cut epoxy wires couplers avoid bonding Swingee parts secure rear portions CyA dropped through small holes made balsa Optional aileron gap covers An idea better gap covers referred plans came after plans inked After covered allerons installed cut -in-wide strip thin rigid plastic 3 mil clear drafting Mylar excellent attach -in-wide double-sticky clear Scotch tape can external under covering wing low heat used Static electricity requires clean environ ment following steps First tape -in strip cutto length work sufface bits black tape placed edge stretch care fully lower position length doublesticky tape accurately other long edge some excess both ends Remove black tape Holding excess ends carefully position over gap slowly lower position Trim excess Finishing various tex coverings bear up better fuselage unrein forced films single 8-in-wide piece can fuselage Make overlaps forward fm around nose Alter fuselage covered protect raw edges around bolt holes large washer eyelet bushing broad flange #5 Dritz Mighty Snaps packet size 24 sewing outlets contains posts well-suited application Put -in dense latex foam Ace Sig etc around three sides fronts battery receiver hatch underside can hollowed out necessary Run antenna down fuselage -in balsa stick typical switch harness nuis ance install since full charge should give three four hours operation battery-to-receiver adapter practical alternative Balance trim saddle cut conform plans wing has 10 incidence Balanced out stab 0-0 little tendency bailcon ship must flown out its heading Use 450 500 mAh pack Vie-in sheet lead squares forward battery balancing necessary Balancing point shown plans enough stab throw will permit gcod spins may fly too squirrely first low-time pilots youre experi enced pilot balance model begin spar trim elevator level flight Keep stab throw front about Ye way initially ship touchy pitch axis After familiarity may want increase throw obtain true spins tighter turns etc Use dual rate setting trans mitter available Tight spins possible adequate stab movement center gravity CG too far ward Some pictures show larger fin hampered spins fm size plans gives ample directional stabil ity akspeeds up tip walk experienced increase aileron differ ential bottom ballast used larger groinmets can adjusted vertically wing hold-downs hold lead onto fuse lage bottom sure sheet lead weights cut folded maintain desired balance point FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY 120 Model Aviation ONLY $4995 Atom Back Approx Wi 175 oz Displacement 09 Cu Bore-5 Stroke 5 Piston Steel Crank CaseMagnesium Alloy inal Crankshaft Bearing Silicon Bronze Cylinder- Chromally Steel Approx RPM -12000 Grey Cox 7 x 4 prop FOBLsAngebs cA cA residents add 6% Sales Tax Order Direct ATOM smallest Ignition engines ever produced Designed R Arden further developments John Morrill Simplex Engines Limited Production Run Delivery 10 12 weeks ARO will receive within 7 days order con firming postcard verify receipt order give assigned engine number ap proximate delivery date Morrill-ADC PO Box 1210 Simi Valley CA 93062
Edition: Model Aviation - 1986/03
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 117, 120
NO OCR TEXT NO OCR TEXT fuselage incorporates special nose construction essentially simple plywood box balsa added permit shaping oval cross section Solid balsa tall surfaces simplify construction airfoils sanded symmetrical sections offer desired low drag THIS 5-FT SLOPE SOARER can easily quickly built can tear across sky high-speed runs can perform aerobatic maneuvers two-channel controls Inside out side loops spins extended inverted flight horizontal vertical rolls inside outside tight vertical turns blistering dives abrupt pullouts high-speed passes kinds showy flight duck soup design distinctive racy appearance rugged highly functional especially clean single nut bolt screw dowel rubberband horn pushrod hangs out ailerons can gapless Swingee fittings used ailerons linkage internal servo tucked flat wing cavity hooked directly Swingees Ailerons hooked up operate differentially Turn ing response ailerons alone no rudder excellent especially tight upelevator given after banking model pushrod flying stab entirely internal passing through fin bellcrank crisp action reliable neutral wing cleanly attached via internal hold-downs Only two little bolt heads visible bottom However 5-ft span assembled model makes small package easily transported slope site ready-to-fly condition An all-up weight 26 oz results wing loading about 8 ozIsq ft pound sheet lead can added internally increase loading higher winds style flying like Buzzbat will saunter around peace fully light wind flying gets interesting lift strong enough downstick pressure used some real speed point youd best blink make diving pass may wonder went ConstructIon Youll need following materials Wood medium-density balsa unless otherwise specified 2 x 3 x 36 ribs Four 6 x spruce spars Two 36 sub-leading edge Two 36 leading edge Two 1 x 36 beveled 1/16 x ling edge stock TE ailerons 3 x hard balsa sparwebbingfrom center Rl wing tip undersides x 36 hatch underbelly 3 x soft fin decking top wing tips 3 x /16 x 36 hard spar webbing Rl R9 interior wing saddle x 36 fuselage doublers x 36 light C-grain stab Four triangular stock joining fuselage sides formers wing ribs dihedral braces misc Four 3 x 1/16 x 36 wing sheeting cap strips ard running antenna down fuselage Spruce x o mounting Birch ply 3/, ers nose center core 24 Model Aviation Hatch merges cleanly ins wing Tairing LomDnuu WEIn IlK um nuD ails provides good wind penetration Contour-type paint scheme adds aireauraleek appearance Birch ply 1/16 x 12 x 48 slab sides bottom braces part bottom sheeting misc Birch /32 ply inlays fin Birch . ply sub-decking aft rear former Music wire 1/16 support Aluminum tubing 1/16 ID stab Two 055 1/i. x 36 music wire aileron stab pushrods Four metal devises Six 2-56 threaded couplers pushrod ends Two Swingees smaller white Delrin type available -in *4 sheet metal screws attach front hold-down 4-40 blind nut attach rear hold-down Two aileron hinges one-piece types fine Three -in 4-40 bolts round heads Tap size 4-40 4-40 self-tapping screw Two Du-Bro A6-in threaded ball links/sockets Aluminum strip Yio x wing hold-downs preferably tempered aircraft aluminum Thin sheet metal tin can etc aileron servo bracket Nylon 1A6-in sheet Sig stab bellcrank Vinyl seating tape 1/16 x saddle Brass 016 sheet making U around Swingee arms Lead 1/16-in sheet ballasting optionai Fuselage Make matched pair 1/ p1y sides As shown up 500 mAhuncased square battery pack wrapped -in latex foam bottom sides can accommodated 450 niAh pack con figured plans will also fit Use root pattern mark wing saddle contour incidence shown front hold-down bent plans space left accept large elevator servo aft former servo plan use can go forward plans show bend hold-down fcot forward notching sides front crosspiece accord ingly front former should just wide enough accept elevator servo cross wise mounting ears 4-in rails Make formers glue side fuselage other inverting assembly gcod alignment Cut attach interior saddle pieces Cut -in ply center core nose noting fits Via-in below top sides Make matched pair spacers fit against sides join front end Glue spacers core trim screw head clearance Cut ply bottom mark centerline Cut 42 birch ply hold-down crosspieces width fuselage bot tom servo used small enough go forward former cut rectangle snugly accept sideways Depending other space needs setup may placed forward battery-toreceiver adapter could also used eliminate bulky wiring harness Add triangular stock TS inside edges fuselage except hatch aft fin front Join nose core/spacer assembly sides Glue bottom crosspieces compart ment divider optional Fin Cut out shape noting goes bottom sides Make bellcrank standard 500 mAh battery pack fits nose Battery-to-receiver adapter cable usea instead bulky switch harness Hatch slides off keys accurately fuselage Wing attaches two Alien-head bolts shown nere Dritz posts sewing Item recess bolt heads provide seats protecting bottom fuselage Swingee-operated ailerons eliminate external hardware Authn says youve never tried youve mimeed * tewlf dmvi Tavi dtaii tII wn Wing trailing edge ailerons included made standard beveled stock forsimplification keep parts fabrication minimum Sig nylon Use #40 bit %2-in wireanda#51 or#S2fortheclevisforno sloppiness binding Make belicrank cutout Trim away 1/32 around bellcrank fin bottom out about inlays go easiest accomplish before balsa sections glued together using inlays marking Add 1/16 ply doublers inlays main support wire Glue inlay Position other Yi6-in shim between make keying marks drill %2-in hole sewing thread spool hole shimmed down decreasing diameter pieces tubing makes good drilling guide Place bellcrank outsides drill series holes arc front stab connecting wire smooth out rough spots Mark path pushrod through fin align servo output arm common carpenters saw can used cut pushrod slot fin bottom pushrod can made 055 1/its-in wire threaded couplers ends threaded rods inserted Y16-in dowel Assemble pushrod lay fin slot Fill underneath balsa Run Yn-in support wire through Glue other inlay rechecking alignment free movement Use Zap cyanoacrylate CyA glue wire inlays Glue Cm fuselage side flush bottom trim TS front fin Clamp fin between sides eyeball shift fin needed eliminate built-in turning tendency ignore leaning Zap 1-in length 1/ cross-grained ply subdecking top just forward Cm secure positioning Glue fin other side let 26 Model Aviation Flying stab pivots rigid support actuated pushrod/bellcrank arrangement assures well-defined neutral Pivot location stab design avoid high-speed fiutter Fin sandwiches between tue ena Olin ply sides s slim extremely strong rear Stab roots fit cieaniy fiat sides ofthefin BUZ ZBAT 2 CHANNEL SLOPE SOARER DESIGNED BY HARLEY MICHAELIS /4 BALSA C NIRA BALSA FIN~CN 3/32 BALSA /64 PLY-DOUBLER 1/32 PLY BALSA OVER 1/16 PLY KEYHOLE PLATE /8 PLY CORE 3/16BALSA WEB 1/16 PLY BOTTOM 1/16 x /4I/B SUB L E SPRUCE SPARS 26 PLY WING BRACES BALSA N N - SWINGEE 1/16 WIRE BALSA TE STOCK ONE PIECE N CAP STRIPS N NN 1/16 BALSA SHEETING TOP BOTTOM N N N- N I/4x3/8 LE glue dry fin leans hold fuselage between knees twist 1-in sections /64 ply subdecking progres sively glued CyA Its good idea protect fingers backing iron-on covering CyA fires Install elevator servo complete pushrod rear former install crosspieces etc guide route pushrod clear hold-downs Finish Y64 ply subdecking sand corners make square box Add hard balsa pine nose core front underbelly Add sheet stock ply box structure shaping fuselage using lighter balsa rear Cut hatch block profile sides fuselage Glue Ys4 ply bottom edges hatch hold-down screw goes Fit dovetailed /s ply plate atop spacer blocks between sides hatch block position drill through mounting plate estab lish common centerline screw rear keyhole slot Set adjust screw hatch punch pinholes balsa around thoroughly reinforce area thin CyA glue Make keyhole slot plate glue place Add keying plate hatch rear underside Sand down ply box corners except along saddle edges Merge /16 ply along hatch area simultaneously shaping hatch razor plane flat Permagrit tool excellent aid forming nice oval cross sections Cut glue fm extension slightly above line stab Work fin generally symmetrical airfoil keep flat stab butts Stab Cut -in balsa preferably light medium C-grain stock Lay against fin correct position mark 3Az-in ID tubes go Cut snug slots press tubes Slip halves make snug slots /16-in ID tubing Shift stab halves slots until same plane aligned well wing saddle Use tiny drop CyA secure tubes position Remove add CyA fill around tubes epoxy putty etc Shape nice symmetrical airfoil thinning toward tips Reinforce I/IS BALSA SHEETING B BALSA B PLY WINGCAP STRIPS ARE NOT SHOWN TIP-DEE CROSS SECTON THIS PANEL FOR CLARITY AT RIGHT TIP 3/32 BALSA RIBS I- II/IBI/4WINGPLANTOPVI SPRUCE SRS I-7R-6P-SR-4R-3P-S I__ AILERON HINGE / //4 50 BALSA YE STOCK SWINGEE BALSA BIB NOTE MAKE PLY RIBO& ROOT AIRFOIL 9 10 STACK CUT 3/32 BALSA SPARTRIM 2 P0~REAR WING FAIRINGRIBS-REARDOUBLERr PLY FACE ROOTR-9R-O BALSA SHEETSADDLE /4 1/6 PLYEDGE BALSATRI STOCK I/IS PLY PLANKSI/ISB" PLYI/BI/B BALSA IBALSAFUSELADE3/IS BA IA-AI/S ~M SHAPE~SHEET _____B-B WING FAIRING DETAILPLY ________BALSA DETAILSEATING 1/16 PLY KEYHOLESPACER1/4 BALSAFORMERL15WING TAPE SOLID BALSAFLATBLOCKYRI-STOCIBPOF CHEEKSA TRECEIVER ABA AREA /8 BALSA SIDES TAPER DOWN TO REAP SLAB SIDE A-/ S/ BALSA WING 3/35 PLY SADDLE FUSELAGE FORMERS 1p-I-S/B _______ 3/35 PLY FORMERS 7-I/S 7-3/4~I/8LONuOC1-3/4FUSELAGE SIDEI-3/4 H/S --- 7 3/B OFF IIS-S/BPLY FAIRING4-40 BL SOLIDORENUTFORM BA I/B PLY____ _ - zmTF AREA 7JECES/ERTh bX__ SOLI BALSA SEERAIL HARD BALSA ORCROSS SECTIONS A-B-C OPTIONAL PINE CHEEKS1/4 TRI STOCKI/IS PLY BOTTOM harden thin edges application ofoutput pushrod clears holdthin CyAdowns Adjust stab 0-0 neutral Position stab servo adjust theis line bottom fuselage 1/83/B ALUM 4-40 TAP 1/4 BALSA TRI -STOCK SAND TO PLY HERE SPACER BLOCKSLAB SIDE--450 MIL I/B PLYPAK COREKkA-lJ HARD---BATT PAK BALSA CHEEK DETAIL NOSEBALSA Left shot interior saddle pieces already 1/16 ply sides joined farmers Ply nose core/spacer glued onto front end Right Bottom croaspieces 1/16 ply glued sides triangle stock added reinforcing hatch keying plate has already glued place Elevator servo recessed fuselage bottom will attached mounting rails 28 Model Aviation 80 Full-Size Plans Available. See Page 164 XJBLERS TO1/16 BALSA SHEETING1/4 3/8 BALSA1/32 PLY CORE B LICE SHEETS-.--TOP 16 BOTTOM-BUTTLEADING EDGEI/B BALSABALSA BLOCK WING nc m nonoSUB L ETIPS I--808-0 RO I6PLYIS~VOSPRUCE 50CK5 1/16 ANG RACESI/4WEBS TO 16 d/4PLYSLOTAS THICK AS THEN 3/16 TO /16BALSA SPRUCE SWINGEE 4 WING TI OSHSTRIPS LSA WEB SPARS NOTE GRAIN BRASS U 1/4 50 BALSA NDI/I6II-IR- /83--4R-S I/I6I/2R7SPAR RB8-I ENTER-~ S OR I/lB ALSA WIRE NOTCH - _ SWINGEE 1/16 PLY ON BOTTOMSIND NUT E S100 PLY DETAIL 4 PLY~ B DEcK C-C CCW ON RIGHT AlL SERVO LOW WIREBALSA T E STOCK REVERSE FOR CWI ONE PIECE OPTIONAL 1/64 PLY GAP COVER SEE TEXT 1/16 PLY WING BRACES NO DIHEDRAL _____/ /16 PLY_______________[11 IDES___________________________________II Ii 25 FINFILL SLOT LBOERr2WINGBRACESjJ PUSHRcIO WIRE/16 PLY BOTTOM 3/32 PLY WITH BALSAIdSTAB CROSSFORMS EXTERIOR SS PIECES SEC ONCONTOUR REARI/B BALSA DETAILC GRAIN /4/ALUMINUM1/64 TUBES ________1/4 BALSA FIN EXTERSION FIN FRONT 1/16 PLY ~JBLER 1/32 PLY FIN DOUBLER I/4\l ThI STOCK BETWEEN SLAB SIDES 3/ 2 1/16 LLASTNG OPTIONS1/16SHEET LEAD 9APPROX 40Z 0 EACH DEIJBLE LAY BETWEEN NOLD DOWNS NOTE 5157 YEFFECTU/4 BALSA C RADIO SIGNAL- RUN ANTENNA HIGHIIIGRAJN IN FUSELAGEIf4I III&BALSA T 1/4 BALSA FINFIL ERFill EXT CONTOURII1/32 PLY INLAY C-CEXTENSIONI 1/16 PLY DOUBLER / jI rqj ii-1/16 NYLON SOLID BALSAIII 111/16 SEE X-SECT BALSA 1/8 BALSA OVER 1/16 PLY SIDES MW PUSHROD SLOT FOR PUSH ROD THIN CLEVIS BALSA 0I23456 FUSELAGE BOTTOM TO FIT ELEV SERVO CASE PLY KEY HATCH IL RAILS ON RIBS BRACKET TO SECURE SERVO WINGDETAIL MODEL AVIATION BUZZBAT 2 CHANNEL SLOPE SOARER SPAN 60 LENGTH 39 AREA 4S0 SQIN DESIGNED BY HARLEY MICHAELIS AMA 32343 [SF ~ ACING BY 70E DEMARcO March 1986 29 ALL RIGHTS RESERVED Left cutout made f stab belicrank slotted underneath accommodate pushrod 3/32-in stab wire rigidlysupported inthe ply inlays/doublers shimmed Spool servesasa drill guide Right Thefin isgiuded totheslab sides 1/64 ply subdecking added top bottom form ply box rugged very light enclosed hardware greatly reduces drag Left Balsa planks blocks added ply fuselage box keyed hatch installed can shaped along rest fuselage Right Balsa sheeting worked razor plane sanding block oval cross sections ply box corners Keep working until nice sculptured shape achieved Model Magic Filler used author fix gaps dings make fillets Left 1/4-in vertical webs plywood braces blind nut have installed Servo railswlll capped balsa centerthe out put wheel vertically cavity Installing 3/16-In webbing out tips next Right Simple wing construction cuts buildIng time Wing flat Permagrit sanding tool especially useful forming rib templates /32 balsa ribs Make RO R9 templates 6 ply Use cut four RO ribs two R9 ribs Clamp eight rectangles balsa between RO R9 templates stack-shape Ri through R8 Reverse templates repeat pro cedure ribs other wing half Level rib tops andtrim /i-in off top edges innermost ROs forward wing brace Cut 6 x ce spars bottom sheeting Note sheeting extends forward -in-thick sub-leading edge Butt-glue spars sheeting except vertical front wing brace goes Trim /16-in sheeting allow brace Pin sheeting ribs work surface make line ball-point pen represent rear sub-leading edge Shape fit solid trailing edge TE stock extend out R5 rib stations Note underside trimmed outermost ROs inlaid /16 ply plate mini micro servo output wheel offset holes needed ailerons Space inboard RO ribs fit servo -in rails Cut -in-deep notches TE ends RO R4 Trim ribs accord ingly Pin TE place 46-in shim strip under RO-R4 ribs Zap TE front aileron line pin down 6in strip fairly hard balsa -in balsa spar strip hinging will later added rear half now glue ribs R5 out piece Cut deep notches spar strip ribs Bevel spar strip match airfoil glue Swingees should handpicked ones move freely have minimum slop piness arm other parts held flat install glue wide strip /16 ply use /32 ply thicker Swingee onto -in balsa aile ron mounting strip aligning against spar front between ribs Swingee will lay Use #11 blade ply cut slot bottom use Swingee guide cut top sides snug fit Cut pair spruce blocks -in long -in strip Trim match Swingee thickness Insert Swingee glue blocks ply form front portion slot sides Remove Swingee Cap strip Of/16 ply complete slot Drill /i6in holes through center ply Swingee hinge line close struc ture drop CyA holes secure taking care avoid bonding moving parts Shim /6-in drill bit drill slot 30 Model Aviation Left Ribs 1-Bare shaped Permagritfile balsa rectangies clamped between plywood templates RO R9 Spruce spars butt-join sheeting eilminating rib notches Above Wing builds flatno dihedral Ribs notched stock-size beveied trail Ing edge also used ailerons Ribs flrsttacked spar CyA one glued sheeting CyA Left An aluminum bracket secures servo rails 1/16-in ball links offset output holes provide aileron differential Right brass strip around Swingee arm receives metal clevis Swingee blocked lnwith spruce ply glued CyA Left OptIonal 1/64 ply coversthe alieron gap thlsvlew underside slit rubbercement bead added cementcures acts hinge slit cracked Right Wing fairing has ply core balsa planking Hatch slides beneath streamlining Len I apered aluminum hold-downa secured wing part secret about wing held two visible screw heads Right author launches Buzzbat another flight Low drag makes ship good performer light winds aileron arm straight forward aileron neutral Use 1/64 ply shim up slot necessary Most type hinge Radio South etc good other locations -in-wide brass strip crimp Ufittings around Swingee arm threads Trim smooth matched pair Out 344 U-fitting make hole clevis pin sized neither bind sioppy Place close possible arms maximum deflection Use metal clevis keeper instead nylon type Aileron trimming will made rotation entire pushrod ball socket end Zap-glue ribs atime spar sheeting maintaining pressure against rib bottoms Check rib fronts tops straightedge sand down build up necessary achieve uniformity Put 1/16 balsa doubler front center bottom sheeting splice wing halves together Add 1/16 sheeting over tops RO ribs splice top center sheeting Cut add vertical webbing sub-leading edge Cut 1/16 ply braces go wing bottom under top sheeting Trim Y16-in ribs forward webbing glue brace flush work surface Rejoin sectioned ribs TS bracing Add block through sheeting attach front hold-down screw block must sufficient size/strength screw get good bite supports models weight G-forces Add top spar sheeting rear brace Add shape leading edge Fit glue 1/34 ply plate rear aluminum hold-down fastens Drill Continued page 117 March 1986 31 Letters Editor Continued page 12 authorized report Bills demise George L Eaton AKA CS Verral now holds copyrights Bills future Bill Barnes killed automobile ac cident No way next thing know will try tell Glenn Miller killed plane crash Bill Barnes lives Bud Overn Santa Ana CA Great men like Barnes legends Bill seen gas station Elcino Lake Charles Nats Safeway super market North Platte Truth must faced fateful day 1952 great pilot foolishly ventured out red Volks wagen van near-hurricane conditions demise covered up CIA due planned highly-sensitive mission Near East could have brought lasting peace region New York Times reluctantly deleted obit Since Frank Tinsley retired happy mayor New England town friends hid news sad event would have broken heart Yes party New York town house reported pa pers Bud Ovem may aware Barnes identical twin perhaps thwarted Japanese Aleu tians Until secret file Pentagon declassffied lips sealed Shorty Sandy party might see things after happy consump tion colorless odorless liquid olives toothpicks butler whispered man New Yorker old times sake Russian-like liquid actually Barnes secret engine coolant drained through loaves white bread Pepperidge family size stood end remove toxic agent Perhaps will news Bud real Sandy always wore green silk shirt first three buttons open reveal tatoo Stormer Sandy wore polka-dot tie nightdoesnt square Having visited soft-spoken FBI type still-secret file can say no EditorPublisher Wheeley has firmly advised same operator publish another word about Barnes case closed Since personally edited Chuck Ver rals copy George L Eaton will sign affidavit Chuck shared chore alternate-month basis Harold Mon tanye Bud Overn Chuck others will remiss Monty forgotten pal Bill playing tennis Gosh Chuck cant tell brothers apart Bill Winter Fairfax VA Buzzbat Continued page 31 hole 4-40 blind nut near plate front dead center wing Make rear hold-down bends somewhat rounded available use tempered aircraft-type aluminum Center punch bent ends out about Y16 drill %2-in holes Tap 4-40 threads Temporarily attach hold-down set wing position saddle Mark hole fuselage bottom drilled Repeat front hold-down foot bent forward accommodate servo locate front hole making template scrap balsa match hold-down hole spacing Lay template fuselage bottom mark Drill holes fuselage resting firmly block making final installation hold-downs glue notched ply plates wing around cant rotate Extend bottom sheeting toward aileron servo minimize open area enclosed fuselage Cut x 1in piece -in birch ply glue centered inside extend over ply plate adjacent bottom sheeting Drill through 4-40 blind nut Attach -in balsa vertical crosspiece aft servo Add TS places ply plate other bottom sheeting meets other Continued page 120 March1986 117 K responding advertisers mention read about Model Aviation DALLAIRE SPORTSTER SPECIFICATIONS Wing Span 72 Inches Wing Chord 11 Inches Power 21-30 Engine Radio 3 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware %$OLD TIMER Rt 1 Box 190 a MS 38754 Telephone 601 2473578 Buzzbat Continued page 117 structural members common damage bad landing piy plates breaking away Add remaining top center sheeting cap strips ex treme tips ply facing wing faking can shaped tack-glued hatch rear broken away glued leading edge wing mounted remainder faking fitted Magic Model Filler can smooth everything out Temporarily add 6-in seating tape adding facingto get good merge between hatch fairing Aileron servo installation Rails glued inside inboard RO ribs po sitioned center servo output wheel vertically cavity metal bracket screws over servo case under side cutout sheeting over servo wheel gives /1-in space Butt servo bottom against rear brace flopped cable best clears front hold-down Aileron differential up down provided placing Yie-in ball links offset holes output wheel Try 450 get least twice much up down avoid adverse yaw Use hole radius least /16 get enough aileron movement Servo-to Swingee linkup plans show applies small white Swingee control wire will run high low ball links side wheel builder dark opposing Swingees used both ball links can top bottom wheel preferably bottom easier access Study servo rotation corresponding Swingee action planes rear radio observe whats happening As turns linear movement up-aileron must greater Tape ailerons neutral Mark cut paths holes pushrod wires through ribs Use coupler suf ficient threads adjustments solder coupler wire aileron end Put metal clevis centered threads use keeper radio output wheel neutral sockets couplers mark wires cut servo end go deep couplers Cut epoxy wires couplers avoid bonding Swingee parts secure rear portions CyA dropped through small holes made balsa Optional aileron gap covers An idea better gap covers referred plans came after plans inked After covered allerons installed cut -in-wide strip thin rigid plastic 3 mil clear drafting Mylar excellent attach -in-wide double-sticky clear Scotch tape can external under covering wing low heat used Static electricity requires clean environ ment following steps First tape -in strip cutto length work sufface bits black tape placed edge stretch care fully lower position length doublesticky tape accurately other long edge some excess both ends Remove black tape Holding excess ends carefully position over gap slowly lower position Trim excess Finishing various tex coverings bear up better fuselage unrein forced films single 8-in-wide piece can fuselage Make overlaps forward fm around nose Alter fuselage covered protect raw edges around bolt holes large washer eyelet bushing broad flange #5 Dritz Mighty Snaps packet size 24 sewing outlets contains posts well-suited application Put -in dense latex foam Ace Sig etc around three sides fronts battery receiver hatch underside can hollowed out necessary Run antenna down fuselage -in balsa stick typical switch harness nuis ance install since full charge should give three four hours operation battery-to-receiver adapter practical alternative Balance trim saddle cut conform plans wing has 10 incidence Balanced out stab 0-0 little tendency bailcon ship must flown out its heading Use 450 500 mAh pack Vie-in sheet lead squares forward battery balancing necessary Balancing point shown plans enough stab throw will permit gcod spins may fly too squirrely first low-time pilots youre experi enced pilot balance model begin spar trim elevator level flight Keep stab throw front about Ye way initially ship touchy pitch axis After familiarity may want increase throw obtain true spins tighter turns etc Use dual rate setting trans mitter available Tight spins possible adequate stab movement center gravity CG too far ward Some pictures show larger fin hampered spins fm size plans gives ample directional stabil ity akspeeds up tip walk experienced increase aileron differ ential bottom ballast used larger groinmets can adjusted vertically wing hold-downs hold lead onto fuse lage bottom sure sheet lead weights cut folded maintain desired balance point FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY 120 Model Aviation ONLY $4995 Atom Back Approx Wi 175 oz Displacement 09 Cu Bore-5 Stroke 5 Piston Steel Crank CaseMagnesium Alloy inal Crankshaft Bearing Silicon Bronze Cylinder- Chromally Steel Approx RPM -12000 Grey Cox 7 x 4 prop FOBLsAngebs cA cA residents add 6% Sales Tax Order Direct ATOM smallest Ignition engines ever produced Designed R Arden further developments John Morrill Simplex Engines Limited Production Run Delivery 10 12 weeks ARO will receive within 7 days order con firming postcard verify receipt order give assigned engine number ap proximate delivery date Morrill-ADC PO Box 1210 Simi Valley CA 93062
Edition: Model Aviation - 1986/03
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 117, 120
NO OCR TEXT NO OCR TEXT fuselage incorporates special nose construction essentially simple plywood box balsa added permit shaping oval cross section Solid balsa tall surfaces simplify construction airfoils sanded symmetrical sections offer desired low drag THIS 5-FT SLOPE SOARER can easily quickly built can tear across sky high-speed runs can perform aerobatic maneuvers two-channel controls Inside out side loops spins extended inverted flight horizontal vertical rolls inside outside tight vertical turns blistering dives abrupt pullouts high-speed passes kinds showy flight duck soup design distinctive racy appearance rugged highly functional especially clean single nut bolt screw dowel rubberband horn pushrod hangs out ailerons can gapless Swingee fittings used ailerons linkage internal servo tucked flat wing cavity hooked directly Swingees Ailerons hooked up operate differentially Turn ing response ailerons alone no rudder excellent especially tight upelevator given after banking model pushrod flying stab entirely internal passing through fin bellcrank crisp action reliable neutral wing cleanly attached via internal hold-downs Only two little bolt heads visible bottom However 5-ft span assembled model makes small package easily transported slope site ready-to-fly condition An all-up weight 26 oz results wing loading about 8 ozIsq ft pound sheet lead can added internally increase loading higher winds style flying like Buzzbat will saunter around peace fully light wind flying gets interesting lift strong enough downstick pressure used some real speed point youd best blink make diving pass may wonder went ConstructIon Youll need following materials Wood medium-density balsa unless otherwise specified 2 x 3 x 36 ribs Four 6 x spruce spars Two 36 sub-leading edge Two 36 leading edge Two 1 x 36 beveled 1/16 x ling edge stock TE ailerons 3 x hard balsa sparwebbingfrom center Rl wing tip undersides x 36 hatch underbelly 3 x soft fin decking top wing tips 3 x /16 x 36 hard spar webbing Rl R9 interior wing saddle x 36 fuselage doublers x 36 light C-grain stab Four triangular stock joining fuselage sides formers wing ribs dihedral braces misc Four 3 x 1/16 x 36 wing sheeting cap strips ard running antenna down fuselage Spruce x o mounting Birch ply 3/, ers nose center core 24 Model Aviation Hatch merges cleanly ins wing Tairing LomDnuu WEIn IlK um nuD ails provides good wind penetration Contour-type paint scheme adds aireauraleek appearance Birch ply 1/16 x 12 x 48 slab sides bottom braces part bottom sheeting misc Birch /32 ply inlays fin Birch . ply sub-decking aft rear former Music wire 1/16 support Aluminum tubing 1/16 ID stab Two 055 1/i. x 36 music wire aileron stab pushrods Four metal devises Six 2-56 threaded couplers pushrod ends Two Swingees smaller white Delrin type available -in *4 sheet metal screws attach front hold-down 4-40 blind nut attach rear hold-down Two aileron hinges one-piece types fine Three -in 4-40 bolts round heads Tap size 4-40 4-40 self-tapping screw Two Du-Bro A6-in threaded ball links/sockets Aluminum strip Yio x wing hold-downs preferably tempered aircraft aluminum Thin sheet metal tin can etc aileron servo bracket Nylon 1A6-in sheet Sig stab bellcrank Vinyl seating tape 1/16 x saddle Brass 016 sheet making U around Swingee arms Lead 1/16-in sheet ballasting optionai Fuselage Make matched pair 1/ p1y sides As shown up 500 mAhuncased square battery pack wrapped -in latex foam bottom sides can accommodated 450 niAh pack con figured plans will also fit Use root pattern mark wing saddle contour incidence shown front hold-down bent plans space left accept large elevator servo aft former servo plan use can go forward plans show bend hold-down fcot forward notching sides front crosspiece accord ingly front former should just wide enough accept elevator servo cross wise mounting ears 4-in rails Make formers glue side fuselage other inverting assembly gcod alignment Cut attach interior saddle pieces Cut -in ply center core nose noting fits Via-in below top sides Make matched pair spacers fit against sides join front end Glue spacers core trim screw head clearance Cut ply bottom mark centerline Cut 42 birch ply hold-down crosspieces width fuselage bot tom servo used small enough go forward former cut rectangle snugly accept sideways Depending other space needs setup may placed forward battery-toreceiver adapter could also used eliminate bulky wiring harness Add triangular stock TS inside edges fuselage except hatch aft fin front Join nose core/spacer assembly sides Glue bottom crosspieces compart ment divider optional Fin Cut out shape noting goes bottom sides Make bellcrank standard 500 mAh battery pack fits nose Battery-to-receiver adapter cable usea instead bulky switch harness Hatch slides off keys accurately fuselage Wing attaches two Alien-head bolts shown nere Dritz posts sewing Item recess bolt heads provide seats protecting bottom fuselage Swingee-operated ailerons eliminate external hardware Authn says youve never tried youve mimeed * tewlf dmvi Tavi dtaii tII wn Wing trailing edge ailerons included made standard beveled stock forsimplification keep parts fabrication minimum Sig nylon Use #40 bit %2-in wireanda#51 or#S2fortheclevisforno sloppiness binding Make belicrank cutout Trim away 1/32 around bellcrank fin bottom out about inlays go easiest accomplish before balsa sections glued together using inlays marking Add 1/16 ply doublers inlays main support wire Glue inlay Position other Yi6-in shim between make keying marks drill %2-in hole sewing thread spool hole shimmed down decreasing diameter pieces tubing makes good drilling guide Place bellcrank outsides drill series holes arc front stab connecting wire smooth out rough spots Mark path pushrod through fin align servo output arm common carpenters saw can used cut pushrod slot fin bottom pushrod can made 055 1/its-in wire threaded couplers ends threaded rods inserted Y16-in dowel Assemble pushrod lay fin slot Fill underneath balsa Run Yn-in support wire through Glue other inlay rechecking alignment free movement Use Zap cyanoacrylate CyA glue wire inlays Glue Cm fuselage side flush bottom trim TS front fin Clamp fin between sides eyeball shift fin needed eliminate built-in turning tendency ignore leaning Zap 1-in length 1/ cross-grained ply subdecking top just forward Cm secure positioning Glue fin other side let 26 Model Aviation Flying stab pivots rigid support actuated pushrod/bellcrank arrangement assures well-defined neutral Pivot location stab design avoid high-speed fiutter Fin sandwiches between tue ena Olin ply sides s slim extremely strong rear Stab roots fit cieaniy fiat sides ofthefin BUZ ZBAT 2 CHANNEL SLOPE SOARER DESIGNED BY HARLEY MICHAELIS /4 BALSA C NIRA BALSA FIN~CN 3/32 BALSA /64 PLY-DOUBLER 1/32 PLY BALSA OVER 1/16 PLY KEYHOLE PLATE /8 PLY CORE 3/16BALSA WEB 1/16 PLY BOTTOM 1/16 x /4I/B SUB L E SPRUCE SPARS 26 PLY WING BRACES BALSA N N - SWINGEE 1/16 WIRE BALSA TE STOCK ONE PIECE N CAP STRIPS N NN 1/16 BALSA SHEETING TOP BOTTOM N N N- N I/4x3/8 LE glue dry fin leans hold fuselage between knees twist 1-in sections /64 ply subdecking progres sively glued CyA Its good idea protect fingers backing iron-on covering CyA fires Install elevator servo complete pushrod rear former install crosspieces etc guide route pushrod clear hold-downs Finish Y64 ply subdecking sand corners make square box Add hard balsa pine nose core front underbelly Add sheet stock ply box structure shaping fuselage using lighter balsa rear Cut hatch block profile sides fuselage Glue Ys4 ply bottom edges hatch hold-down screw goes Fit dovetailed /s ply plate atop spacer blocks between sides hatch block position drill through mounting plate estab lish common centerline screw rear keyhole slot Set adjust screw hatch punch pinholes balsa around thoroughly reinforce area thin CyA glue Make keyhole slot plate glue place Add keying plate hatch rear underside Sand down ply box corners except along saddle edges Merge /16 ply along hatch area simultaneously shaping hatch razor plane flat Permagrit tool excellent aid forming nice oval cross sections Cut glue fm extension slightly above line stab Work fin generally symmetrical airfoil keep flat stab butts Stab Cut -in balsa preferably light medium C-grain stock Lay against fin correct position mark 3Az-in ID tubes go Cut snug slots press tubes Slip halves make snug slots /16-in ID tubing Shift stab halves slots until same plane aligned well wing saddle Use tiny drop CyA secure tubes position Remove add CyA fill around tubes epoxy putty etc Shape nice symmetrical airfoil thinning toward tips Reinforce I/IS BALSA SHEETING B BALSA B PLY WINGCAP STRIPS ARE NOT SHOWN TIP-DEE CROSS SECTON THIS PANEL FOR CLARITY AT RIGHT TIP 3/32 BALSA RIBS I- II/IBI/4WINGPLANTOPVI SPRUCE SRS I-7R-6P-SR-4R-3P-S I__ AILERON HINGE / //4 50 BALSA YE STOCK SWINGEE BALSA BIB NOTE MAKE PLY RIBO& ROOT AIRFOIL 9 10 STACK CUT 3/32 BALSA SPARTRIM 2 P0~REAR WING FAIRINGRIBS-REARDOUBLERr PLY FACE ROOTR-9R-O BALSA SHEETSADDLE /4 1/6 PLYEDGE BALSATRI STOCK I/IS PLY PLANKSI/ISB" PLYI/BI/B BALSA IBALSAFUSELADE3/IS BA IA-AI/S ~M SHAPE~SHEET _____B-B WING FAIRING DETAILPLY ________BALSA DETAILSEATING 1/16 PLY KEYHOLESPACER1/4 BALSAFORMERL15WING TAPE SOLID BALSAFLATBLOCKYRI-STOCIBPOF CHEEKSA TRECEIVER ABA AREA /8 BALSA SIDES TAPER DOWN TO REAP SLAB SIDE A-/ S/ BALSA WING 3/35 PLY SADDLE FUSELAGE FORMERS 1p-I-S/B _______ 3/35 PLY FORMERS 7-I/S 7-3/4~I/8LONuOC1-3/4FUSELAGE SIDEI-3/4 H/S --- 7 3/B OFF IIS-S/BPLY FAIRING4-40 BL SOLIDORENUTFORM BA I/B PLY____ _ - zmTF AREA 7JECES/ERTh bX__ SOLI BALSA SEERAIL HARD BALSA ORCROSS SECTIONS A-B-C OPTIONAL PINE CHEEKS1/4 TRI STOCKI/IS PLY BOTTOM harden thin edges application ofoutput pushrod clears holdthin CyAdowns Adjust stab 0-0 neutral Position stab servo adjust theis line bottom fuselage 1/83/B ALUM 4-40 TAP 1/4 BALSA TRI -STOCK SAND TO PLY HERE SPACER BLOCKSLAB SIDE--450 MIL I/B PLYPAK COREKkA-lJ HARD---BATT PAK BALSA CHEEK DETAIL NOSEBALSA Left shot interior saddle pieces already 1/16 ply sides joined farmers Ply nose core/spacer glued onto front end Right Bottom croaspieces 1/16 ply glued sides triangle stock added reinforcing hatch keying plate has already glued place Elevator servo recessed fuselage bottom will attached mounting rails 28 Model Aviation 80 Full-Size Plans Available. See Page 164 XJBLERS TO1/16 BALSA SHEETING1/4 3/8 BALSA1/32 PLY CORE B LICE SHEETS-.--TOP 16 BOTTOM-BUTTLEADING EDGEI/B BALSABALSA BLOCK WING nc m nonoSUB L ETIPS I--808-0 RO I6PLYIS~VOSPRUCE 50CK5 1/16 ANG RACESI/4WEBS TO 16 d/4PLYSLOTAS THICK AS THEN 3/16 TO /16BALSA SPRUCE SWINGEE 4 WING TI OSHSTRIPS LSA WEB SPARS NOTE GRAIN BRASS U 1/4 50 BALSA NDI/I6II-IR- /83--4R-S I/I6I/2R7SPAR RB8-I ENTER-~ S OR I/lB ALSA WIRE NOTCH - _ SWINGEE 1/16 PLY ON BOTTOMSIND NUT E S100 PLY DETAIL 4 PLY~ B DEcK C-C CCW ON RIGHT AlL SERVO LOW WIREBALSA T E STOCK REVERSE FOR CWI ONE PIECE OPTIONAL 1/64 PLY GAP COVER SEE TEXT 1/16 PLY WING BRACES NO DIHEDRAL _____/ /16 PLY_______________[11 IDES___________________________________II Ii 25 FINFILL SLOT LBOERr2WINGBRACESjJ PUSHRcIO WIRE/16 PLY BOTTOM 3/32 PLY WITH BALSAIdSTAB CROSSFORMS EXTERIOR SS PIECES SEC ONCONTOUR REARI/B BALSA DETAILC GRAIN /4/ALUMINUM1/64 TUBES ________1/4 BALSA FIN EXTERSION FIN FRONT 1/16 PLY ~JBLER 1/32 PLY FIN DOUBLER I/4\l ThI STOCK BETWEEN SLAB SIDES 3/ 2 1/16 LLASTNG OPTIONS1/16SHEET LEAD 9APPROX 40Z 0 EACH DEIJBLE LAY BETWEEN NOLD DOWNS NOTE 5157 YEFFECTU/4 BALSA C RADIO SIGNAL- RUN ANTENNA HIGHIIIGRAJN IN FUSELAGEIf4I III&BALSA T 1/4 BALSA FINFIL ERFill EXT CONTOURII1/32 PLY INLAY C-CEXTENSIONI 1/16 PLY DOUBLER / jI rqj ii-1/16 NYLON SOLID BALSAIII 111/16 SEE X-SECT BALSA 1/8 BALSA OVER 1/16 PLY SIDES MW PUSHROD SLOT FOR PUSH ROD THIN CLEVIS BALSA 0I23456 FUSELAGE BOTTOM TO FIT ELEV SERVO CASE PLY KEY HATCH IL RAILS ON RIBS BRACKET TO SECURE SERVO WINGDETAIL MODEL AVIATION BUZZBAT 2 CHANNEL SLOPE SOARER SPAN 60 LENGTH 39 AREA 4S0 SQIN DESIGNED BY HARLEY MICHAELIS AMA 32343 [SF ~ ACING BY 70E DEMARcO March 1986 29 ALL RIGHTS RESERVED Left cutout made f stab belicrank slotted underneath accommodate pushrod 3/32-in stab wire rigidlysupported inthe ply inlays/doublers shimmed Spool servesasa drill guide Right Thefin isgiuded totheslab sides 1/64 ply subdecking added top bottom form ply box rugged very light enclosed hardware greatly reduces drag Left Balsa planks blocks added ply fuselage box keyed hatch installed can shaped along rest fuselage Right Balsa sheeting worked razor plane sanding block oval cross sections ply box corners Keep working until nice sculptured shape achieved Model Magic Filler used author fix gaps dings make fillets Left 1/4-in vertical webs plywood braces blind nut have installed Servo railswlll capped balsa centerthe out put wheel vertically cavity Installing 3/16-In webbing out tips next Right Simple wing construction cuts buildIng time Wing flat Permagrit sanding tool especially useful forming rib templates /32 balsa ribs Make RO R9 templates 6 ply Use cut four RO ribs two R9 ribs Clamp eight rectangles balsa between RO R9 templates stack-shape Ri through R8 Reverse templates repeat pro cedure ribs other wing half Level rib tops andtrim /i-in off top edges innermost ROs forward wing brace Cut 6 x ce spars bottom sheeting Note sheeting extends forward -in-thick sub-leading edge Butt-glue spars sheeting except vertical front wing brace goes Trim /16-in sheeting allow brace Pin sheeting ribs work surface make line ball-point pen represent rear sub-leading edge Shape fit solid trailing edge TE stock extend out R5 rib stations Note underside trimmed outermost ROs inlaid /16 ply plate mini micro servo output wheel offset holes needed ailerons Space inboard RO ribs fit servo -in rails Cut -in-deep notches TE ends RO R4 Trim ribs accord ingly Pin TE place 46-in shim strip under RO-R4 ribs Zap TE front aileron line pin down 6in strip fairly hard balsa -in balsa spar strip hinging will later added rear half now glue ribs R5 out piece Cut deep notches spar strip ribs Bevel spar strip match airfoil glue Swingees should handpicked ones move freely have minimum slop piness arm other parts held flat install glue wide strip /16 ply use /32 ply thicker Swingee onto -in balsa aile ron mounting strip aligning against spar front between ribs Swingee will lay Use #11 blade ply cut slot bottom use Swingee guide cut top sides snug fit Cut pair spruce blocks -in long -in strip Trim match Swingee thickness Insert Swingee glue blocks ply form front portion slot sides Remove Swingee Cap strip Of/16 ply complete slot Drill /i6in holes through center ply Swingee hinge line close struc ture drop CyA holes secure taking care avoid bonding moving parts Shim /6-in drill bit drill slot 30 Model Aviation Left Ribs 1-Bare shaped Permagritfile balsa rectangies clamped between plywood templates RO R9 Spruce spars butt-join sheeting eilminating rib notches Above Wing builds flatno dihedral Ribs notched stock-size beveied trail Ing edge also used ailerons Ribs flrsttacked spar CyA one glued sheeting CyA Left An aluminum bracket secures servo rails 1/16-in ball links offset output holes provide aileron differential Right brass strip around Swingee arm receives metal clevis Swingee blocked lnwith spruce ply glued CyA Left OptIonal 1/64 ply coversthe alieron gap thlsvlew underside slit rubbercement bead added cementcures acts hinge slit cracked Right Wing fairing has ply core balsa planking Hatch slides beneath streamlining Len I apered aluminum hold-downa secured wing part secret about wing held two visible screw heads Right author launches Buzzbat another flight Low drag makes ship good performer light winds aileron arm straight forward aileron neutral Use 1/64 ply shim up slot necessary Most type hinge Radio South etc good other locations -in-wide brass strip crimp Ufittings around Swingee arm threads Trim smooth matched pair Out 344 U-fitting make hole clevis pin sized neither bind sioppy Place close possible arms maximum deflection Use metal clevis keeper instead nylon type Aileron trimming will made rotation entire pushrod ball socket end Zap-glue ribs atime spar sheeting maintaining pressure against rib bottoms Check rib fronts tops straightedge sand down build up necessary achieve uniformity Put 1/16 balsa doubler front center bottom sheeting splice wing halves together Add 1/16 sheeting over tops RO ribs splice top center sheeting Cut add vertical webbing sub-leading edge Cut 1/16 ply braces go wing bottom under top sheeting Trim Y16-in ribs forward webbing glue brace flush work surface Rejoin sectioned ribs TS bracing Add block through sheeting attach front hold-down screw block must sufficient size/strength screw get good bite supports models weight G-forces Add top spar sheeting rear brace Add shape leading edge Fit glue 1/34 ply plate rear aluminum hold-down fastens Drill Continued page 117 March 1986 31 Letters Editor Continued page 12 authorized report Bills demise George L Eaton AKA CS Verral now holds copyrights Bills future Bill Barnes killed automobile ac cident No way next thing know will try tell Glenn Miller killed plane crash Bill Barnes lives Bud Overn Santa Ana CA Great men like Barnes legends Bill seen gas station Elcino Lake Charles Nats Safeway super market North Platte Truth must faced fateful day 1952 great pilot foolishly ventured out red Volks wagen van near-hurricane conditions demise covered up CIA due planned highly-sensitive mission Near East could have brought lasting peace region New York Times reluctantly deleted obit Since Frank Tinsley retired happy mayor New England town friends hid news sad event would have broken heart Yes party New York town house reported pa pers Bud Ovem may aware Barnes identical twin perhaps thwarted Japanese Aleu tians Until secret file Pentagon declassffied lips sealed Shorty Sandy party might see things after happy consump tion colorless odorless liquid olives toothpicks butler whispered man New Yorker old times sake Russian-like liquid actually Barnes secret engine coolant drained through loaves white bread Pepperidge family size stood end remove toxic agent Perhaps will news Bud real Sandy always wore green silk shirt first three buttons open reveal tatoo Stormer Sandy wore polka-dot tie nightdoesnt square Having visited soft-spoken FBI type still-secret file can say no EditorPublisher Wheeley has firmly advised same operator publish another word about Barnes case closed Since personally edited Chuck Ver rals copy George L Eaton will sign affidavit Chuck shared chore alternate-month basis Harold Mon tanye Bud Overn Chuck others will remiss Monty forgotten pal Bill playing tennis Gosh Chuck cant tell brothers apart Bill Winter Fairfax VA Buzzbat Continued page 31 hole 4-40 blind nut near plate front dead center wing Make rear hold-down bends somewhat rounded available use tempered aircraft-type aluminum Center punch bent ends out about Y16 drill %2-in holes Tap 4-40 threads Temporarily attach hold-down set wing position saddle Mark hole fuselage bottom drilled Repeat front hold-down foot bent forward accommodate servo locate front hole making template scrap balsa match hold-down hole spacing Lay template fuselage bottom mark Drill holes fuselage resting firmly block making final installation hold-downs glue notched ply plates wing around cant rotate Extend bottom sheeting toward aileron servo minimize open area enclosed fuselage Cut x 1in piece -in birch ply glue centered inside extend over ply plate adjacent bottom sheeting Drill through 4-40 blind nut Attach -in balsa vertical crosspiece aft servo Add TS places ply plate other bottom sheeting meets other Continued page 120 March1986 117 K responding advertisers mention read about Model Aviation DALLAIRE SPORTSTER SPECIFICATIONS Wing Span 72 Inches Wing Chord 11 Inches Power 21-30 Engine Radio 3 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware %$OLD TIMER Rt 1 Box 190 a MS 38754 Telephone 601 2473578 Buzzbat Continued page 117 structural members common damage bad landing piy plates breaking away Add remaining top center sheeting cap strips ex treme tips ply facing wing faking can shaped tack-glued hatch rear broken away glued leading edge wing mounted remainder faking fitted Magic Model Filler can smooth everything out Temporarily add 6-in seating tape adding facingto get good merge between hatch fairing Aileron servo installation Rails glued inside inboard RO ribs po sitioned center servo output wheel vertically cavity metal bracket screws over servo case under side cutout sheeting over servo wheel gives /1-in space Butt servo bottom against rear brace flopped cable best clears front hold-down Aileron differential up down provided placing Yie-in ball links offset holes output wheel Try 450 get least twice much up down avoid adverse yaw Use hole radius least /16 get enough aileron movement Servo-to Swingee linkup plans show applies small white Swingee control wire will run high low ball links side wheel builder dark opposing Swingees used both ball links can top bottom wheel preferably bottom easier access Study servo rotation corresponding Swingee action planes rear radio observe whats happening As turns linear movement up-aileron must greater Tape ailerons neutral Mark cut paths holes pushrod wires through ribs Use coupler suf ficient threads adjustments solder coupler wire aileron end Put metal clevis centered threads use keeper radio output wheel neutral sockets couplers mark wires cut servo end go deep couplers Cut epoxy wires couplers avoid bonding Swingee parts secure rear portions CyA dropped through small holes made balsa Optional aileron gap covers An idea better gap covers referred plans came after plans inked After covered allerons installed cut -in-wide strip thin rigid plastic 3 mil clear drafting Mylar excellent attach -in-wide double-sticky clear Scotch tape can external under covering wing low heat used Static electricity requires clean environ ment following steps First tape -in strip cutto length work sufface bits black tape placed edge stretch care fully lower position length doublesticky tape accurately other long edge some excess both ends Remove black tape Holding excess ends carefully position over gap slowly lower position Trim excess Finishing various tex coverings bear up better fuselage unrein forced films single 8-in-wide piece can fuselage Make overlaps forward fm around nose Alter fuselage covered protect raw edges around bolt holes large washer eyelet bushing broad flange #5 Dritz Mighty Snaps packet size 24 sewing outlets contains posts well-suited application Put -in dense latex foam Ace Sig etc around three sides fronts battery receiver hatch underside can hollowed out necessary Run antenna down fuselage -in balsa stick typical switch harness nuis ance install since full charge should give three four hours operation battery-to-receiver adapter practical alternative Balance trim saddle cut conform plans wing has 10 incidence Balanced out stab 0-0 little tendency bailcon ship must flown out its heading Use 450 500 mAh pack Vie-in sheet lead squares forward battery balancing necessary Balancing point shown plans enough stab throw will permit gcod spins may fly too squirrely first low-time pilots youre experi enced pilot balance model begin spar trim elevator level flight Keep stab throw front about Ye way initially ship touchy pitch axis After familiarity may want increase throw obtain true spins tighter turns etc Use dual rate setting trans mitter available Tight spins possible adequate stab movement center gravity CG too far ward Some pictures show larger fin hampered spins fm size plans gives ample directional stabil ity akspeeds up tip walk experienced increase aileron differ ential bottom ballast used larger groinmets can adjusted vertically wing hold-downs hold lead onto fuse lage bottom sure sheet lead weights cut folded maintain desired balance point FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY 120 Model Aviation ONLY $4995 Atom Back Approx Wi 175 oz Displacement 09 Cu Bore-5 Stroke 5 Piston Steel Crank CaseMagnesium Alloy inal Crankshaft Bearing Silicon Bronze Cylinder- Chromally Steel Approx RPM -12000 Grey Cox 7 x 4 prop FOBLsAngebs cA cA residents add 6% Sales Tax Order Direct ATOM smallest Ignition engines ever produced Designed R Arden further developments John Morrill Simplex Engines Limited Production Run Delivery 10 12 weeks ARO will receive within 7 days order con firming postcard verify receipt order give assigned engine number ap proximate delivery date Morrill-ADC PO Box 1210 Simi Valley CA 93062