NO OCR TEXT it All moments kept reasonable lengths tight enough hot perform ance wanted mid-wing configuration resulted certain difficulties Considering size Snapdragon one-piece plane inev itable Radio space could also problem spars leading edge trailing edge passing through thrust line As pre viously stated wing chord turned out per fect radio installation Should wing severely damaged one-piece airplane could mean having junk whole thing Therefore strength must wing D-tube construc tion trailing edge sheeting tips squared off simplicity no det rimental effects ply dihedral doubler added just safe side though spars run straight through Trail ing edge tips used prevent possi bility aileron flutter box-style fuselage offered simplicity strength remember looks didnt count project help aero batic ability top bottom contours fuselage symmetrical hatches allow full easy access fuel tank radio equipment Formers kept minimum blunt-nose Stik-type firewall selected No nose wheels please tail dragger wide stance generous tail wheel moment will nicely Joining wing fuselage offers no big problem Just profile Control Line planes hole cut wing inserted aligned epoxy applied fin horizontal stabi lizer cut sheet balsa round out brainstorm first Snapdragon constructed using balsa fuselage keep down weight Problems developed rather quickly tail moment too short proper balance problem control throws set up too high roll rate uncontrollable end result noseheavy erratic aircraft Step step pounding after pound ing kinks worked out tail glued back control throws slowed down center gravity CU reworked last two flights sticks handed friend fellow club member Jeff Stoltz hell fly anything least once time flew although still some what sensitive After two successful easy flights tail popped off again landing Snapdragon found bottom trash can Lessons learned applied three built plywood fuse lages corrected tail moments late August Jeff went field tried again Jeff set plane up Enya 25XTV set up Su pertigre S-29 Tigers Paw muffler Jeff went up first Well hows doing After thoughtful pause Jeff responded Ill tell ya soon nerves calm down After landing settling down bit Jeff took up out practice figured now experienced Snapdragon pilot result again sweet success Takeoffs quick Outrageous climb out angles possible model turned rolled looped better expected Stall turns snaps some thing behold little planes seemed float sky snapped hearts content occasion since Left Somehow using flower logo didnt quite seem right fellow drawn up square corners certainly indicative mod els flight performance Right Control surfaces rather large results quick tight maneuvers desired Its hard see devices kept closed small piece fuel tubing something should standard high-performance model May 1988 25 given weekend several Snapdragons can found chasing darting after other up down Yadkin river bottom authors iocal club field North Carolina Left the hatches off radio fuel tank completely accessible length fuel tubing prevents plywood side rubbing through Insulation antenna Right rough landings crashes 1A-20 nylon bolts allow landing gear break away instead tearing out bottom fuselage Dave Brown Lite Flight Wheels very durable offer significant weight savings tried half snap inverted worked Vertical dives L-shaped pullouts possible Jeff bold enough try Snapdragon has exceeded expec tations size perfect transport yet large enough seen flight design has elements fair symine try results good inverted flight performance controls turned up will tie itself knots Slow down have quick sport ship 15%-thick fully symmetrical airfoil long chord provides plenty lift small plane Blunt tips keep simple big ailerons provide plenty roll response fully aerobatic Supertigre S-29 faster two models though slightly heavier Jeff s both due heavier engine weight added tail bal ancing Enya 25XTV OS Max 25FP Snapdragon balances per fectly having add ballast larger 40-size engine would too much plane Sometime intend try Enya see just what bottom end range Slow flight characteristics surpris ing generous wing control surface area allow putter along like trainer landing approaches plane flares nicely pull nose up higher will mush careful though will snap try park Remember 26 Model Aviation back Jeff Stoitz pick-uD looks like Its loaded up combat match shows just roomSniSlmollcitvIs time scent flvina uwng nuai runwey mw uiru w up unu banking away Takeoff rolls short straight No difficulty ground looping has experienced Steep climb-out gles can made strong 25 engine 1/16 BALSA 518 x 3/4 LEADING SNAPDRAGON W M CARTRETTE 1/8 BALSA K BALSA EDGE 1/4 PLYHAYES P/N AL-25 ENGINE MOUNT 25 TO30 EN G NE HALLCO L G 1/16 BALSA WEBS VERTICAL GRAIN 2-1/2 DIA WHEELS LITE FLIGHT 3/B BALSA TRI STOCK pI/USHEET N LITE PLY I/8LITE PLY SPRUCE SPARS x TOP B BOTTOM 3/8x I-I/2 BALSA TRAILING EDGE STOCK 3/32 BALSA I/4 BALSA Cutting out parts before begin construction reduces clutter workbench makes assembly go much faster easiest way cut ribs stacking shaping blanks Note notches cut leading trailing edge pieces shown picture left author says prefers pre-drill firewall formers may want wait until after model has assembled Left wing standard D-tube construction open center bay allows plenty radio room No cap strips used ribs save assembly time really arent necessary plane Right certain build right left fuselage side best lay out mirror images make sure No cutouts needed fuselage will balance still have plenty tail strength isnt trainer No ballooning tendencies have noted landings Ground handling excellent wide stance main gear tail moment combine give straight takeoff roll landing roll-out No ground looping has oc curred Prop clearance ample nineinch props surprisingly few props have broken plane low profile allows good crosswind taxiing fly ing 2-in wheel selected main gear allow rough terrain foam wheels selected keep weight down Contact ground landing results very little bouncing Like plane slam landing will bouncebut responds quickly enough allow gun engine go around reclaim pride chose use nose gear obvious reasons tend bend rough landings steering gets sloppy wear love eat props Snapdragons main gear mounted 1420 nylon bolts shear away nicely ditch have already saved few headaches Construction Before assemble thing advantageous cut out parts create kit Go ahead drill out firewall former holes Save hatches landing gear mount holes until later Stack sand W3 ribs leave W4 tips bit oversized since will sanded wing contour later balsa used hard grade used Sig Lite Ply throughout adhesive used Zap CA SbZap thinner Zap great sheeting tacking bonding balsa balsa Sb-Zap gives working time works better butt joints areas re quire strength will also need some 30-minute epoxy firewall fuselage/wing joint Flex-Zap can safely substituted some savings weight Wing Lets begin Cut 34 x x 36-in leading edge LE pieces down 22 in. Also cut 48-in-long spars 4 x -in balsa trailing edge TE down 45 Using plan carefully mark rib locations LE TE spars As shown plan use razor saw notch LE TE accept ribs W2 W3 cut notches ribs Wl butt joints Note LE pieces have buttjoined doubled piece / x x 24 -in ply important center ply doubler between marks ribs W 1 Glue LE doubler together now Make sure leading edges straight Use flat surface straight edge necessary Using flat surface lay out plans cover protective film choice prefer wax paper Ill enter debate Align lower spar TE plans Shim up spar scrap strip A6 balsa TE 5A-in blocks Making sure everything lines up plans position glue ribs W2 W3 Use building triangle ensure ribs 900 spar Now glue top spar LE Glue -in ply dihedral braces A6 balsa vertical webbing spars per plan Align glue fore aft pieces ribs W 1 Glue LE TE sheeting shown Carefully align glue place maple servo rails Pay special attention side view plans ensure tops servo rails line up level Use actual servo check proper fit Finish sheeting two center sections Wl W2 completes wing assembly now Fuselage Being sure have right left side mark locations firewall formers F2 F3 maple hatch anchor blocks tail block Cut glue 3/6-sq balsa strips indicated flush edges both fuselage halves Next attach maple hatch anchors %-in tri angular balsa pieces reinforce land ing gear mount Align two fuselage halves secure tail ends together masking tape fuselage sides straight align ment epoxy-glue firewall also glue F2 F3 Glue %-in balsa triangular braces firewall 3A6-sq strips reinforce formers run along top edge F2 Remove masking tape install tail block again checking fuselage alignment Glue A-in ply nose bottom 4-in landing gear mount -in ply strips under radio fuel tank hatch tongues will anchor Sheet top fuselage -in 28 Model Aviation S/H3/4 BALSA LEADING EDGE _zLITEPLYDBLR 3/4LO-3/4 -I ~-~IFAlLHI-#--if DIAEORALVIE BALSA S*ETififIf I/IS BALSA BRACEDTOPS BOTTOMIIIiIi SHEETING TOP -3W-3W-3W-3W-W-16-I11211A-31W-31W 3W-311 AND BOTTOM SHEETVIA BALSA SHONO3/B-IIIIII II CLARITYTOP N BOTTOM WINGPLANTOPVIEW 24x 02 I 1/16 BALSAVEHYICAL GRAINSPRUCE SPARS BALSABINGE TOP OMITTED FORI__LOCATION ------I -~-----_------H---_I MAPLEI _________________SEBSO RAILS1/H BRASS TUBING I---_-3/32 BALSAW-3 SHEET________ F-I V4 PlY 3/BSU MAPLE BLOCKS OHILLED I/LYW3/B BALSA TRI-STOCKANG TAPPED FORIA 4-40 F-I MUSIC WIRE I/A BALSA SHEET3/RI I-I/O BALSA TRAILING EDGE ClOCK SHEETVA BALSAMA0. W 2SHEETIVVUV\AxAA 0 MOUNT 11 3H BALSAiiBURN B STOC Al ENGR BASW E____H EII II IL BFUSELAGE TOP YIEWESITBOHR11 IIlL SBROD ARGE E\\~JAAAVVLIiLILI4\i 3/IS 50/RUDDER BALSA/ SA P FUSELAGE SIDEDIHEDRAL E 1/A PLY LG MOUNT FOR I/A20FINRUDDEF GOLDBERG DUBRO MEG LUE RYRUD N ARD IPPROD AENSRE MOUNTYELLOW RYROD THRUST17J77iI77i1fZE PL 51005I/H IT /HALLODSPECIFICATIONS VI//J//A Q-]WING AREAARK 5G IN LL/JLiiL LSiNJWEIGHT3-3/4 LBS F 3ME FUGHT NOSE BOTTOMTANK HATCHRADIO HATCL TYPICAL HINGE LOCATION \4STABI LIZ ER jjAj rD34DB MODEL AVIATION SNAPDRAGON MID-WING SPORT B FUN FLY PLANE DESIGNED S DRAWN BY W M CARTRETTE TRACING BY JOE DEMARCO ALL RIGHTS RESERVED VABALSA SHEET W-4 3/IA BALSA SHEET \~ II2 cross-grain balsa F3 stabilizer saddle now ready attach wing Give wing preliminary sanding carefully sand off burrs wing slots fuselage Making sure wing right side up carefully patiently slide through fuselage Take care splinter ribs dig sheeting necessary sand out wing slot some alter incidence Once wing centered aligned fu selage tack place few drops Zap Slide A-in brass tubing over ail eron torque rods bend cut shown Note different lengths brass tubes prefer ence Rocket City swivel links included %2-in torque rods Insert torque rod assemblies through fuselage along TE wing shown Re check make sure proper sides tack place CyA Glue wing place 30-minute epoxy generous inside excessive outside build up slight fillet using wet finger smear epoxy along joint Also epoxy brass tubing wing fuselage being care ful get torque rods recommend wrapping bit fiberglass around longer left brass tubing TE added strength torque rod Coat thin cyanoacrylate CyA will have very secure bond Carefully align horizontal stabilizer fuselage glue epoxy stab elevator fin rudder cut /16 hard balsa sheet certain stabilizer centered level wing 900 fuselage center line dry glue %-in triangular braces support stab A-in ply tail plate Attach fin triangular braces fuselage shown making certain TE lines up notch tail plate tail wheel wire will come through should fall rudder hinge line Bore hole through balsa under neath glue yellow Nyrod guide flush tail plate Insert piece straight /16 music wire through Nyrod help line up A-in ply tail wheel plate bottom fuselage fin top Once satisfied CyA tail wheel plate place Position glue rudder eleva tor control rod guides prefer blue Sul livan Products Gold-N-Rod control link ages have drawn plans using have found no problems slop can add brace midway up fuselage desire reinforce guides Once control system set time sheet bottom fuselage A-in crossgrain balsa Check hatches proper fitting Trim necessary Attach tongues hatches fit place care fully drill screw holes through hatch maple blocks using A6 bit Tap blocks 4-40 screw ealarge hatch holes A-in diameter landing gear chose Hallco Temper-Lock rated 45 60 lb gear rated 40 45 lb would probably suf fice sturdier needed slam-and-goes gear drilled out ac cept two 4-20 nylon bolts 4-in ply landing gear plate drilled match 5A2 bit tapped 4-20 Coat threads thin Zap run tap back through Plywood tends splinter will help reinforce threads Should threads eventually strip out just drill holes out 4 use 4-20 blind nuts last steps before covering put place glue throttle pushrod guide fuel-proof firewall fuel tank compartment Any butyrate dope will nicely throttle prefer use Sullivan Products Gold-N-Rod throttle cable rather fool music wire Finish wings gluing A-in W4 balsa tips TE tips cut 1 /2 x %-in TE stock sure re 30 Model Aviation Left It very important keep fuselage straight untwisted during construction easiest method temporarily tape tail gether install firewall formers permanently join tail Right stab must level wing Measure stab tip wing tip side get alignment correct Draw centerline down top fuselage guide mount fin line up triangle absolutely certain fin/rudder hinge line inline hole tail wheel wire comes through Left firewall landing gear mount should solidly braced stage fuel tank hatch lip ply nose bottom already place Also note strips along top edge F2 create hatch seat Right Center align wing carefully measuring tip fu selage side tip tall joint Make sure top wing up far will go Sheet top rear fuselage cross-grain balsa Left Install section yellow Nyrod act bearing tail wheel wire After glue sets Nyrod install tail wheel plate Use piece scrap music wire keep Nyrod aligned glue dries plate Right Install throttle cable guide ail eron torque rod assembly Notch trailing edge stock needed torque rods can move freely through entire range move beveled edge TE tips dont reflex droop Remember wing symmetrical done cut ailerons 1 in TE stock rudder elevator /16 balsa per plans Bevel hinge surfaces shown Go ahead bore torque rod holes ailerons coat inside thin CyA harden balsa careful clog up holes parts should given final sanding before covering preference cover plane before attaching ailerons ele vator rudder technique allows thorough covering job espe cially along hinge lines ends aileron stock Snapdragons far have covered Top Flite Super MonoKote planes design lends itself well glossy finish Super Mono Kote preference covering jobs have kept simple consistent Yellow chosen main color darker colors have variedthough usually metallics covering important remember color scheme should aid telling top model bottom espe cially plane quick small Trying see fin landing gear no fun get disoriented thats dragon wing dark underbelly help out Finish up hinging control surfaces preference Lake Hobbies Easy Hinges bond securely few drops thin Zap hinge slot easily made #11 X-Acto blade hinges require no pinning mount rudder first bend 1A6 tail wheel wire accept l-in-dia tail wheel Carl Goldberg nylon tail wheel bracket mounted slot tail wheel plate aligned Nyrod sleeve Insert tail wheel wire up through mount sleeve bend right angle cut shown side view plan Bore out /l6 hole rudder accept music wire hinge rudder place Mount ailerons elevator shown Mount landing gear two -20 bolts % long will shear off during rough landings wheels decided upon 2/2-in-dia Dave Brown Products Lite Flite Wheels bored out accept 46 axle Carl Goldberg Long Nylon Control Horus Snap-Links round out control linkage attaching control horn rudder recommend attaching over hole tail wheel wire inserts rudderfor added strength business end bird rec ommend Du-Bro 6-oz fuel tank Hayes P/N AL-25 engine mount Du-Bro tank fits perfectly fuel vent lines run straight out through fire wall no bends kinks Ive learued through experience Hayes mount very strong long enough allow move engine forward aft help balancing model flying has done using Zinger 9-5 props have performed well 25 29 engines best prop have found S-29 engine 9-55 Glass Nylon Prop manufactured Yo shioka Model Factory dont recommend trying low pitch 10-in prop 29 en gine model due lack prop clear ance Please remember safe flying rule Like RC aircraft Snapdrag can will bite stick fingers prop Continued page 32 May 1988 31 wing tip trailing edge tip final touches assembling wing Sand glue surface trailing edge tip follows airfoil shape otherwise bevel cut wood will cause tip droop down reflex upward Holes drilled hatches place sanding done plane ready covering Flat surfa ces square corners make covering model breeze control surfaces tail wheel will added last Dont misled solid surfaces plane comes out very light Littlest Miracle Workshop PROFESSIONAL TOOL Send 50 SUITABLE FOR ALLfor catalog HOBBIES AND CRAFTS Makers of. Mini-Glue 74s Stray- Tray Tee Bar Mini-Saw fuff-Stuff & Jewel Stripes SCALE RADIO_CONTROL OK VINTAGE sizes214 31/a 1334 11443/i 1145 P/86s/ LEI2L APPLIED DESIGN CORP PO Box 3384 Torrance CA 90510 WHEELS CONTROL-UNE FREE-FLIGHT NEW BALLOON 21/z4/2 314514 3 As stated before Supertigre S-29 Tigers Paw muffler faster 25 engines requires roughly 1 oz tail weight washer downthrust combination plane will literally pull itself vertically out hands dont try Enya 25XTV combo seems best plane moves out quickly doesnt require added weight 05 Max 25FP solid performer ones Ive seen dont have quite power Enya Install radio choice have used Futaba Conquest 4NL Air tronics SR4R find both excel lent Note elevator rudder ser vos mounted bit offset prevent crowding pushrods on-off switch charging jack mounted fuse lage side opposite engine exhaust receiver battery area Route re ceiver antenna outside fuselage away engine exhaust usually attach fin incorporate rubberband shock cord Always wrap receiver battery pack foam rubber prevent damage vibration impact Also enclose both plastic wrap prevent exposure raw fuel should fuel tank leak first flight set up ailerons 14 throw way rudder should begin 1 elevator % can crank up later like set up throws too hot plane can get away Right now flying about 1% rud der travel ator 3/ ailerons combination plenty hot still controllable help encouragement devel opment testing plane special thanks go Charles Downing Patrick OConnell Jeff Stoltzall fellow mem bers RAMS RC club WinstonSalem King area North Carolina Charlie contributed much advice aerodynamics structure plane Hes also great story two about adventures RC Charlie encouraged write up article about Snapdragon Patrick spent hours discussing improve upon popular Fun Fly designs ideas corporated Snapdragon Patrick plane awaits Jeff has put plane through its paces stamped seal approval clear day can found banks Yadkin River making shoestring-high inverted passes down runway other members RAMS have bitten lips during some ear lier fiascoes gentlemen am grateful please keep quiet SAFE FLYING IS NO ACCIDENT Recoil Tubing Fourmost Fourmost Recoil Tubing four foot length super tough fuel proof urethane Extends tubing preformed four inch coil Four Feet attached fuel can allows placement field box fuel can convenient distance air craft boat After use tubing will retract its original space -saving form out the soil out way Price $450 No 123 Size 1/8 lD information about Recoil Tubing other innovative model products Fourmost send stamped self-addressed business size envelope FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 503 357-2732 $265 repl strips Add 20% postage SMOOTH CONTOUR 3/4234 13/4 1143 11/2414 214514 GOLDEN AGE sizes21/i 314 13 114 43/i 1145 P/8 614 Send *3 fully illustrated catalog other kite accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS
Edition: Model Aviation - 1988/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32
NO OCR TEXT it All moments kept reasonable lengths tight enough hot perform ance wanted mid-wing configuration resulted certain difficulties Considering size Snapdragon one-piece plane inev itable Radio space could also problem spars leading edge trailing edge passing through thrust line As pre viously stated wing chord turned out per fect radio installation Should wing severely damaged one-piece airplane could mean having junk whole thing Therefore strength must wing D-tube construc tion trailing edge sheeting tips squared off simplicity no det rimental effects ply dihedral doubler added just safe side though spars run straight through Trail ing edge tips used prevent possi bility aileron flutter box-style fuselage offered simplicity strength remember looks didnt count project help aero batic ability top bottom contours fuselage symmetrical hatches allow full easy access fuel tank radio equipment Formers kept minimum blunt-nose Stik-type firewall selected No nose wheels please tail dragger wide stance generous tail wheel moment will nicely Joining wing fuselage offers no big problem Just profile Control Line planes hole cut wing inserted aligned epoxy applied fin horizontal stabi lizer cut sheet balsa round out brainstorm first Snapdragon constructed using balsa fuselage keep down weight Problems developed rather quickly tail moment too short proper balance problem control throws set up too high roll rate uncontrollable end result noseheavy erratic aircraft Step step pounding after pound ing kinks worked out tail glued back control throws slowed down center gravity CU reworked last two flights sticks handed friend fellow club member Jeff Stoltz hell fly anything least once time flew although still some what sensitive After two successful easy flights tail popped off again landing Snapdragon found bottom trash can Lessons learned applied three built plywood fuse lages corrected tail moments late August Jeff went field tried again Jeff set plane up Enya 25XTV set up Su pertigre S-29 Tigers Paw muffler Jeff went up first Well hows doing After thoughtful pause Jeff responded Ill tell ya soon nerves calm down After landing settling down bit Jeff took up out practice figured now experienced Snapdragon pilot result again sweet success Takeoffs quick Outrageous climb out angles possible model turned rolled looped better expected Stall turns snaps some thing behold little planes seemed float sky snapped hearts content occasion since Left Somehow using flower logo didnt quite seem right fellow drawn up square corners certainly indicative mod els flight performance Right Control surfaces rather large results quick tight maneuvers desired Its hard see devices kept closed small piece fuel tubing something should standard high-performance model May 1988 25 given weekend several Snapdragons can found chasing darting after other up down Yadkin river bottom authors iocal club field North Carolina Left the hatches off radio fuel tank completely accessible length fuel tubing prevents plywood side rubbing through Insulation antenna Right rough landings crashes 1A-20 nylon bolts allow landing gear break away instead tearing out bottom fuselage Dave Brown Lite Flight Wheels very durable offer significant weight savings tried half snap inverted worked Vertical dives L-shaped pullouts possible Jeff bold enough try Snapdragon has exceeded expec tations size perfect transport yet large enough seen flight design has elements fair symine try results good inverted flight performance controls turned up will tie itself knots Slow down have quick sport ship 15%-thick fully symmetrical airfoil long chord provides plenty lift small plane Blunt tips keep simple big ailerons provide plenty roll response fully aerobatic Supertigre S-29 faster two models though slightly heavier Jeff s both due heavier engine weight added tail bal ancing Enya 25XTV OS Max 25FP Snapdragon balances per fectly having add ballast larger 40-size engine would too much plane Sometime intend try Enya see just what bottom end range Slow flight characteristics surpris ing generous wing control surface area allow putter along like trainer landing approaches plane flares nicely pull nose up higher will mush careful though will snap try park Remember 26 Model Aviation back Jeff Stoitz pick-uD looks like Its loaded up combat match shows just roomSniSlmollcitvIs time scent flvina uwng nuai runwey mw uiru w up unu banking away Takeoff rolls short straight No difficulty ground looping has experienced Steep climb-out gles can made strong 25 engine 1/16 BALSA 518 x 3/4 LEADING SNAPDRAGON W M CARTRETTE 1/8 BALSA K BALSA EDGE 1/4 PLYHAYES P/N AL-25 ENGINE MOUNT 25 TO30 EN G NE HALLCO L G 1/16 BALSA WEBS VERTICAL GRAIN 2-1/2 DIA WHEELS LITE FLIGHT 3/B BALSA TRI STOCK pI/USHEET N LITE PLY I/8LITE PLY SPRUCE SPARS x TOP B BOTTOM 3/8x I-I/2 BALSA TRAILING EDGE STOCK 3/32 BALSA I/4 BALSA Cutting out parts before begin construction reduces clutter workbench makes assembly go much faster easiest way cut ribs stacking shaping blanks Note notches cut leading trailing edge pieces shown picture left author says prefers pre-drill firewall formers may want wait until after model has assembled Left wing standard D-tube construction open center bay allows plenty radio room No cap strips used ribs save assembly time really arent necessary plane Right certain build right left fuselage side best lay out mirror images make sure No cutouts needed fuselage will balance still have plenty tail strength isnt trainer No ballooning tendencies have noted landings Ground handling excellent wide stance main gear tail moment combine give straight takeoff roll landing roll-out No ground looping has oc curred Prop clearance ample nineinch props surprisingly few props have broken plane low profile allows good crosswind taxiing fly ing 2-in wheel selected main gear allow rough terrain foam wheels selected keep weight down Contact ground landing results very little bouncing Like plane slam landing will bouncebut responds quickly enough allow gun engine go around reclaim pride chose use nose gear obvious reasons tend bend rough landings steering gets sloppy wear love eat props Snapdragons main gear mounted 1420 nylon bolts shear away nicely ditch have already saved few headaches Construction Before assemble thing advantageous cut out parts create kit Go ahead drill out firewall former holes Save hatches landing gear mount holes until later Stack sand W3 ribs leave W4 tips bit oversized since will sanded wing contour later balsa used hard grade used Sig Lite Ply throughout adhesive used Zap CA SbZap thinner Zap great sheeting tacking bonding balsa balsa Sb-Zap gives working time works better butt joints areas re quire strength will also need some 30-minute epoxy firewall fuselage/wing joint Flex-Zap can safely substituted some savings weight Wing Lets begin Cut 34 x x 36-in leading edge LE pieces down 22 in. Also cut 48-in-long spars 4 x -in balsa trailing edge TE down 45 Using plan carefully mark rib locations LE TE spars As shown plan use razor saw notch LE TE accept ribs W2 W3 cut notches ribs Wl butt joints Note LE pieces have buttjoined doubled piece / x x 24 -in ply important center ply doubler between marks ribs W 1 Glue LE doubler together now Make sure leading edges straight Use flat surface straight edge necessary Using flat surface lay out plans cover protective film choice prefer wax paper Ill enter debate Align lower spar TE plans Shim up spar scrap strip A6 balsa TE 5A-in blocks Making sure everything lines up plans position glue ribs W2 W3 Use building triangle ensure ribs 900 spar Now glue top spar LE Glue -in ply dihedral braces A6 balsa vertical webbing spars per plan Align glue fore aft pieces ribs W 1 Glue LE TE sheeting shown Carefully align glue place maple servo rails Pay special attention side view plans ensure tops servo rails line up level Use actual servo check proper fit Finish sheeting two center sections Wl W2 completes wing assembly now Fuselage Being sure have right left side mark locations firewall formers F2 F3 maple hatch anchor blocks tail block Cut glue 3/6-sq balsa strips indicated flush edges both fuselage halves Next attach maple hatch anchors %-in tri angular balsa pieces reinforce land ing gear mount Align two fuselage halves secure tail ends together masking tape fuselage sides straight align ment epoxy-glue firewall also glue F2 F3 Glue %-in balsa triangular braces firewall 3A6-sq strips reinforce formers run along top edge F2 Remove masking tape install tail block again checking fuselage alignment Glue A-in ply nose bottom 4-in landing gear mount -in ply strips under radio fuel tank hatch tongues will anchor Sheet top fuselage -in 28 Model Aviation S/H3/4 BALSA LEADING EDGE _zLITEPLYDBLR 3/4LO-3/4 -I ~-~IFAlLHI-#--if DIAEORALVIE BALSA S*ETififIf I/IS BALSA BRACEDTOPS BOTTOMIIIiIi SHEETING TOP -3W-3W-3W-3W-W-16-I11211A-31W-31W 3W-311 AND BOTTOM SHEETVIA BALSA SHONO3/B-IIIIII II CLARITYTOP N BOTTOM WINGPLANTOPVIEW 24x 02 I 1/16 BALSAVEHYICAL GRAINSPRUCE SPARS BALSABINGE TOP OMITTED FORI__LOCATION ------I -~-----_------H---_I MAPLEI _________________SEBSO RAILS1/H BRASS TUBING I---_-3/32 BALSAW-3 SHEET________ F-I V4 PlY 3/BSU MAPLE BLOCKS OHILLED I/LYW3/B BALSA TRI-STOCKANG TAPPED FORIA 4-40 F-I MUSIC WIRE I/A BALSA SHEET3/RI I-I/O BALSA TRAILING EDGE ClOCK SHEETVA BALSAMA0. W 2SHEETIVVUV\AxAA 0 MOUNT 11 3H BALSAiiBURN B STOC Al ENGR BASW E____H EII II IL BFUSELAGE TOP YIEWESITBOHR11 IIlL SBROD ARGE E\\~JAAAVVLIiLILI4\i 3/IS 50/RUDDER BALSA/ SA P FUSELAGE SIDEDIHEDRAL E 1/A PLY LG MOUNT FOR I/A20FINRUDDEF GOLDBERG DUBRO MEG LUE RYRUD N ARD IPPROD AENSRE MOUNTYELLOW RYROD THRUST17J77iI77i1fZE PL 51005I/H IT /HALLODSPECIFICATIONS VI//J//A Q-]WING AREAARK 5G IN LL/JLiiL LSiNJWEIGHT3-3/4 LBS F 3ME FUGHT NOSE BOTTOMTANK HATCHRADIO HATCL TYPICAL HINGE LOCATION \4STABI LIZ ER jjAj rD34DB MODEL AVIATION SNAPDRAGON MID-WING SPORT B FUN FLY PLANE DESIGNED S DRAWN BY W M CARTRETTE TRACING BY JOE DEMARCO ALL RIGHTS RESERVED VABALSA SHEET W-4 3/IA BALSA SHEET \~ II2 cross-grain balsa F3 stabilizer saddle now ready attach wing Give wing preliminary sanding carefully sand off burrs wing slots fuselage Making sure wing right side up carefully patiently slide through fuselage Take care splinter ribs dig sheeting necessary sand out wing slot some alter incidence Once wing centered aligned fu selage tack place few drops Zap Slide A-in brass tubing over ail eron torque rods bend cut shown Note different lengths brass tubes prefer ence Rocket City swivel links included %2-in torque rods Insert torque rod assemblies through fuselage along TE wing shown Re check make sure proper sides tack place CyA Glue wing place 30-minute epoxy generous inside excessive outside build up slight fillet using wet finger smear epoxy along joint Also epoxy brass tubing wing fuselage being care ful get torque rods recommend wrapping bit fiberglass around longer left brass tubing TE added strength torque rod Coat thin cyanoacrylate CyA will have very secure bond Carefully align horizontal stabilizer fuselage glue epoxy stab elevator fin rudder cut /16 hard balsa sheet certain stabilizer centered level wing 900 fuselage center line dry glue %-in triangular braces support stab A-in ply tail plate Attach fin triangular braces fuselage shown making certain TE lines up notch tail plate tail wheel wire will come through should fall rudder hinge line Bore hole through balsa under neath glue yellow Nyrod guide flush tail plate Insert piece straight /16 music wire through Nyrod help line up A-in ply tail wheel plate bottom fuselage fin top Once satisfied CyA tail wheel plate place Position glue rudder eleva tor control rod guides prefer blue Sul livan Products Gold-N-Rod control link ages have drawn plans using have found no problems slop can add brace midway up fuselage desire reinforce guides Once control system set time sheet bottom fuselage A-in crossgrain balsa Check hatches proper fitting Trim necessary Attach tongues hatches fit place care fully drill screw holes through hatch maple blocks using A6 bit Tap blocks 4-40 screw ealarge hatch holes A-in diameter landing gear chose Hallco Temper-Lock rated 45 60 lb gear rated 40 45 lb would probably suf fice sturdier needed slam-and-goes gear drilled out ac cept two 4-20 nylon bolts 4-in ply landing gear plate drilled match 5A2 bit tapped 4-20 Coat threads thin Zap run tap back through Plywood tends splinter will help reinforce threads Should threads eventually strip out just drill holes out 4 use 4-20 blind nuts last steps before covering put place glue throttle pushrod guide fuel-proof firewall fuel tank compartment Any butyrate dope will nicely throttle prefer use Sullivan Products Gold-N-Rod throttle cable rather fool music wire Finish wings gluing A-in W4 balsa tips TE tips cut 1 /2 x %-in TE stock sure re 30 Model Aviation Left It very important keep fuselage straight untwisted during construction easiest method temporarily tape tail gether install firewall formers permanently join tail Right stab must level wing Measure stab tip wing tip side get alignment correct Draw centerline down top fuselage guide mount fin line up triangle absolutely certain fin/rudder hinge line inline hole tail wheel wire comes through Left firewall landing gear mount should solidly braced stage fuel tank hatch lip ply nose bottom already place Also note strips along top edge F2 create hatch seat Right Center align wing carefully measuring tip fu selage side tip tall joint Make sure top wing up far will go Sheet top rear fuselage cross-grain balsa Left Install section yellow Nyrod act bearing tail wheel wire After glue sets Nyrod install tail wheel plate Use piece scrap music wire keep Nyrod aligned glue dries plate Right Install throttle cable guide ail eron torque rod assembly Notch trailing edge stock needed torque rods can move freely through entire range move beveled edge TE tips dont reflex droop Remember wing symmetrical done cut ailerons 1 in TE stock rudder elevator /16 balsa per plans Bevel hinge surfaces shown Go ahead bore torque rod holes ailerons coat inside thin CyA harden balsa careful clog up holes parts should given final sanding before covering preference cover plane before attaching ailerons ele vator rudder technique allows thorough covering job espe cially along hinge lines ends aileron stock Snapdragons far have covered Top Flite Super MonoKote planes design lends itself well glossy finish Super Mono Kote preference covering jobs have kept simple consistent Yellow chosen main color darker colors have variedthough usually metallics covering important remember color scheme should aid telling top model bottom espe cially plane quick small Trying see fin landing gear no fun get disoriented thats dragon wing dark underbelly help out Finish up hinging control surfaces preference Lake Hobbies Easy Hinges bond securely few drops thin Zap hinge slot easily made #11 X-Acto blade hinges require no pinning mount rudder first bend 1A6 tail wheel wire accept l-in-dia tail wheel Carl Goldberg nylon tail wheel bracket mounted slot tail wheel plate aligned Nyrod sleeve Insert tail wheel wire up through mount sleeve bend right angle cut shown side view plan Bore out /l6 hole rudder accept music wire hinge rudder place Mount ailerons elevator shown Mount landing gear two -20 bolts % long will shear off during rough landings wheels decided upon 2/2-in-dia Dave Brown Products Lite Flite Wheels bored out accept 46 axle Carl Goldberg Long Nylon Control Horus Snap-Links round out control linkage attaching control horn rudder recommend attaching over hole tail wheel wire inserts rudderfor added strength business end bird rec ommend Du-Bro 6-oz fuel tank Hayes P/N AL-25 engine mount Du-Bro tank fits perfectly fuel vent lines run straight out through fire wall no bends kinks Ive learued through experience Hayes mount very strong long enough allow move engine forward aft help balancing model flying has done using Zinger 9-5 props have performed well 25 29 engines best prop have found S-29 engine 9-55 Glass Nylon Prop manufactured Yo shioka Model Factory dont recommend trying low pitch 10-in prop 29 en gine model due lack prop clear ance Please remember safe flying rule Like RC aircraft Snapdrag can will bite stick fingers prop Continued page 32 May 1988 31 wing tip trailing edge tip final touches assembling wing Sand glue surface trailing edge tip follows airfoil shape otherwise bevel cut wood will cause tip droop down reflex upward Holes drilled hatches place sanding done plane ready covering Flat surfa ces square corners make covering model breeze control surfaces tail wheel will added last Dont misled solid surfaces plane comes out very light Littlest Miracle Workshop PROFESSIONAL TOOL Send 50 SUITABLE FOR ALLfor catalog HOBBIES AND CRAFTS Makers of. Mini-Glue 74s Stray- Tray Tee Bar Mini-Saw fuff-Stuff & Jewel Stripes SCALE RADIO_CONTROL OK VINTAGE sizes214 31/a 1334 11443/i 1145 P/86s/ LEI2L APPLIED DESIGN CORP PO Box 3384 Torrance CA 90510 WHEELS CONTROL-UNE FREE-FLIGHT NEW BALLOON 21/z4/2 314514 3 As stated before Supertigre S-29 Tigers Paw muffler faster 25 engines requires roughly 1 oz tail weight washer downthrust combination plane will literally pull itself vertically out hands dont try Enya 25XTV combo seems best plane moves out quickly doesnt require added weight 05 Max 25FP solid performer ones Ive seen dont have quite power Enya Install radio choice have used Futaba Conquest 4NL Air tronics SR4R find both excel lent Note elevator rudder ser vos mounted bit offset prevent crowding pushrods on-off switch charging jack mounted fuse lage side opposite engine exhaust receiver battery area Route re ceiver antenna outside fuselage away engine exhaust usually attach fin incorporate rubberband shock cord Always wrap receiver battery pack foam rubber prevent damage vibration impact Also enclose both plastic wrap prevent exposure raw fuel should fuel tank leak first flight set up ailerons 14 throw way rudder should begin 1 elevator % can crank up later like set up throws too hot plane can get away Right now flying about 1% rud der travel ator 3/ ailerons combination plenty hot still controllable help encouragement devel opment testing plane special thanks go Charles Downing Patrick OConnell Jeff Stoltzall fellow mem bers RAMS RC club WinstonSalem King area North Carolina Charlie contributed much advice aerodynamics structure plane Hes also great story two about adventures RC Charlie encouraged write up article about Snapdragon Patrick spent hours discussing improve upon popular Fun Fly designs ideas corporated Snapdragon Patrick plane awaits Jeff has put plane through its paces stamped seal approval clear day can found banks Yadkin River making shoestring-high inverted passes down runway other members RAMS have bitten lips during some ear lier fiascoes gentlemen am grateful please keep quiet SAFE FLYING IS NO ACCIDENT Recoil Tubing Fourmost Fourmost Recoil Tubing four foot length super tough fuel proof urethane Extends tubing preformed four inch coil Four Feet attached fuel can allows placement field box fuel can convenient distance air craft boat After use tubing will retract its original space -saving form out the soil out way Price $450 No 123 Size 1/8 lD information about Recoil Tubing other innovative model products Fourmost send stamped self-addressed business size envelope FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 503 357-2732 $265 repl strips Add 20% postage SMOOTH CONTOUR 3/4234 13/4 1143 11/2414 214514 GOLDEN AGE sizes21/i 314 13 114 43/i 1145 P/8 614 Send *3 fully illustrated catalog other kite accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS
Edition: Model Aviation - 1988/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32
NO OCR TEXT it All moments kept reasonable lengths tight enough hot perform ance wanted mid-wing configuration resulted certain difficulties Considering size Snapdragon one-piece plane inev itable Radio space could also problem spars leading edge trailing edge passing through thrust line As pre viously stated wing chord turned out per fect radio installation Should wing severely damaged one-piece airplane could mean having junk whole thing Therefore strength must wing D-tube construc tion trailing edge sheeting tips squared off simplicity no det rimental effects ply dihedral doubler added just safe side though spars run straight through Trail ing edge tips used prevent possi bility aileron flutter box-style fuselage offered simplicity strength remember looks didnt count project help aero batic ability top bottom contours fuselage symmetrical hatches allow full easy access fuel tank radio equipment Formers kept minimum blunt-nose Stik-type firewall selected No nose wheels please tail dragger wide stance generous tail wheel moment will nicely Joining wing fuselage offers no big problem Just profile Control Line planes hole cut wing inserted aligned epoxy applied fin horizontal stabi lizer cut sheet balsa round out brainstorm first Snapdragon constructed using balsa fuselage keep down weight Problems developed rather quickly tail moment too short proper balance problem control throws set up too high roll rate uncontrollable end result noseheavy erratic aircraft Step step pounding after pound ing kinks worked out tail glued back control throws slowed down center gravity CU reworked last two flights sticks handed friend fellow club member Jeff Stoltz hell fly anything least once time flew although still some what sensitive After two successful easy flights tail popped off again landing Snapdragon found bottom trash can Lessons learned applied three built plywood fuse lages corrected tail moments late August Jeff went field tried again Jeff set plane up Enya 25XTV set up Su pertigre S-29 Tigers Paw muffler Jeff went up first Well hows doing After thoughtful pause Jeff responded Ill tell ya soon nerves calm down After landing settling down bit Jeff took up out practice figured now experienced Snapdragon pilot result again sweet success Takeoffs quick Outrageous climb out angles possible model turned rolled looped better expected Stall turns snaps some thing behold little planes seemed float sky snapped hearts content occasion since Left Somehow using flower logo didnt quite seem right fellow drawn up square corners certainly indicative mod els flight performance Right Control surfaces rather large results quick tight maneuvers desired Its hard see devices kept closed small piece fuel tubing something should standard high-performance model May 1988 25 given weekend several Snapdragons can found chasing darting after other up down Yadkin river bottom authors iocal club field North Carolina Left the hatches off radio fuel tank completely accessible length fuel tubing prevents plywood side rubbing through Insulation antenna Right rough landings crashes 1A-20 nylon bolts allow landing gear break away instead tearing out bottom fuselage Dave Brown Lite Flight Wheels very durable offer significant weight savings tried half snap inverted worked Vertical dives L-shaped pullouts possible Jeff bold enough try Snapdragon has exceeded expec tations size perfect transport yet large enough seen flight design has elements fair symine try results good inverted flight performance controls turned up will tie itself knots Slow down have quick sport ship 15%-thick fully symmetrical airfoil long chord provides plenty lift small plane Blunt tips keep simple big ailerons provide plenty roll response fully aerobatic Supertigre S-29 faster two models though slightly heavier Jeff s both due heavier engine weight added tail bal ancing Enya 25XTV OS Max 25FP Snapdragon balances per fectly having add ballast larger 40-size engine would too much plane Sometime intend try Enya see just what bottom end range Slow flight characteristics surpris ing generous wing control surface area allow putter along like trainer landing approaches plane flares nicely pull nose up higher will mush careful though will snap try park Remember 26 Model Aviation back Jeff Stoitz pick-uD looks like Its loaded up combat match shows just roomSniSlmollcitvIs time scent flvina uwng nuai runwey mw uiru w up unu banking away Takeoff rolls short straight No difficulty ground looping has experienced Steep climb-out gles can made strong 25 engine 1/16 BALSA 518 x 3/4 LEADING SNAPDRAGON W M CARTRETTE 1/8 BALSA K BALSA EDGE 1/4 PLYHAYES P/N AL-25 ENGINE MOUNT 25 TO30 EN G NE HALLCO L G 1/16 BALSA WEBS VERTICAL GRAIN 2-1/2 DIA WHEELS LITE FLIGHT 3/B BALSA TRI STOCK pI/USHEET N LITE PLY I/8LITE PLY SPRUCE SPARS x TOP B BOTTOM 3/8x I-I/2 BALSA TRAILING EDGE STOCK 3/32 BALSA I/4 BALSA Cutting out parts before begin construction reduces clutter workbench makes assembly go much faster easiest way cut ribs stacking shaping blanks Note notches cut leading trailing edge pieces shown picture left author says prefers pre-drill firewall formers may want wait until after model has assembled Left wing standard D-tube construction open center bay allows plenty radio room No cap strips used ribs save assembly time really arent necessary plane Right certain build right left fuselage side best lay out mirror images make sure No cutouts needed fuselage will balance still have plenty tail strength isnt trainer No ballooning tendencies have noted landings Ground handling excellent wide stance main gear tail moment combine give straight takeoff roll landing roll-out No ground looping has oc curred Prop clearance ample nineinch props surprisingly few props have broken plane low profile allows good crosswind taxiing fly ing 2-in wheel selected main gear allow rough terrain foam wheels selected keep weight down Contact ground landing results very little bouncing Like plane slam landing will bouncebut responds quickly enough allow gun engine go around reclaim pride chose use nose gear obvious reasons tend bend rough landings steering gets sloppy wear love eat props Snapdragons main gear mounted 1420 nylon bolts shear away nicely ditch have already saved few headaches Construction Before assemble thing advantageous cut out parts create kit Go ahead drill out firewall former holes Save hatches landing gear mount holes until later Stack sand W3 ribs leave W4 tips bit oversized since will sanded wing contour later balsa used hard grade used Sig Lite Ply throughout adhesive used Zap CA SbZap thinner Zap great sheeting tacking bonding balsa balsa Sb-Zap gives working time works better butt joints areas re quire strength will also need some 30-minute epoxy firewall fuselage/wing joint Flex-Zap can safely substituted some savings weight Wing Lets begin Cut 34 x x 36-in leading edge LE pieces down 22 in. Also cut 48-in-long spars 4 x -in balsa trailing edge TE down 45 Using plan carefully mark rib locations LE TE spars As shown plan use razor saw notch LE TE accept ribs W2 W3 cut notches ribs Wl butt joints Note LE pieces have buttjoined doubled piece / x x 24 -in ply important center ply doubler between marks ribs W 1 Glue LE doubler together now Make sure leading edges straight Use flat surface straight edge necessary Using flat surface lay out plans cover protective film choice prefer wax paper Ill enter debate Align lower spar TE plans Shim up spar scrap strip A6 balsa TE 5A-in blocks Making sure everything lines up plans position glue ribs W2 W3 Use building triangle ensure ribs 900 spar Now glue top spar LE Glue -in ply dihedral braces A6 balsa vertical webbing spars per plan Align glue fore aft pieces ribs W 1 Glue LE TE sheeting shown Carefully align glue place maple servo rails Pay special attention side view plans ensure tops servo rails line up level Use actual servo check proper fit Finish sheeting two center sections Wl W2 completes wing assembly now Fuselage Being sure have right left side mark locations firewall formers F2 F3 maple hatch anchor blocks tail block Cut glue 3/6-sq balsa strips indicated flush edges both fuselage halves Next attach maple hatch anchors %-in tri angular balsa pieces reinforce land ing gear mount Align two fuselage halves secure tail ends together masking tape fuselage sides straight align ment epoxy-glue firewall also glue F2 F3 Glue %-in balsa triangular braces firewall 3A6-sq strips reinforce formers run along top edge F2 Remove masking tape install tail block again checking fuselage alignment Glue A-in ply nose bottom 4-in landing gear mount -in ply strips under radio fuel tank hatch tongues will anchor Sheet top fuselage -in 28 Model Aviation S/H3/4 BALSA LEADING EDGE _zLITEPLYDBLR 3/4LO-3/4 -I ~-~IFAlLHI-#--if DIAEORALVIE BALSA S*ETififIf I/IS BALSA BRACEDTOPS BOTTOMIIIiIi SHEETING TOP -3W-3W-3W-3W-W-16-I11211A-31W-31W 3W-311 AND BOTTOM SHEETVIA BALSA SHONO3/B-IIIIII II CLARITYTOP N BOTTOM WINGPLANTOPVIEW 24x 02 I 1/16 BALSAVEHYICAL GRAINSPRUCE SPARS BALSABINGE TOP OMITTED FORI__LOCATION ------I -~-----_------H---_I MAPLEI _________________SEBSO RAILS1/H BRASS TUBING I---_-3/32 BALSAW-3 SHEET________ F-I V4 PlY 3/BSU MAPLE BLOCKS OHILLED I/LYW3/B BALSA TRI-STOCKANG TAPPED FORIA 4-40 F-I MUSIC WIRE I/A BALSA SHEET3/RI I-I/O BALSA TRAILING EDGE ClOCK SHEETVA BALSAMA0. W 2SHEETIVVUV\AxAA 0 MOUNT 11 3H BALSAiiBURN B STOC Al ENGR BASW E____H EII II IL BFUSELAGE TOP YIEWESITBOHR11 IIlL SBROD ARGE E\\~JAAAVVLIiLILI4\i 3/IS 50/RUDDER BALSA/ SA P FUSELAGE SIDEDIHEDRAL E 1/A PLY LG MOUNT FOR I/A20FINRUDDEF GOLDBERG DUBRO MEG LUE RYRUD N ARD IPPROD AENSRE MOUNTYELLOW RYROD THRUST17J77iI77i1fZE PL 51005I/H IT /HALLODSPECIFICATIONS VI//J//A Q-]WING AREAARK 5G IN LL/JLiiL LSiNJWEIGHT3-3/4 LBS F 3ME FUGHT NOSE BOTTOMTANK HATCHRADIO HATCL TYPICAL HINGE LOCATION \4STABI LIZ ER jjAj rD34DB MODEL AVIATION SNAPDRAGON MID-WING SPORT B FUN FLY PLANE DESIGNED S DRAWN BY W M CARTRETTE TRACING BY JOE DEMARCO ALL RIGHTS RESERVED VABALSA SHEET W-4 3/IA BALSA SHEET \~ II2 cross-grain balsa F3 stabilizer saddle now ready attach wing Give wing preliminary sanding carefully sand off burrs wing slots fuselage Making sure wing right side up carefully patiently slide through fuselage Take care splinter ribs dig sheeting necessary sand out wing slot some alter incidence Once wing centered aligned fu selage tack place few drops Zap Slide A-in brass tubing over ail eron torque rods bend cut shown Note different lengths brass tubes prefer ence Rocket City swivel links included %2-in torque rods Insert torque rod assemblies through fuselage along TE wing shown Re check make sure proper sides tack place CyA Glue wing place 30-minute epoxy generous inside excessive outside build up slight fillet using wet finger smear epoxy along joint Also epoxy brass tubing wing fuselage being care ful get torque rods recommend wrapping bit fiberglass around longer left brass tubing TE added strength torque rod Coat thin cyanoacrylate CyA will have very secure bond Carefully align horizontal stabilizer fuselage glue epoxy stab elevator fin rudder cut /16 hard balsa sheet certain stabilizer centered level wing 900 fuselage center line dry glue %-in triangular braces support stab A-in ply tail plate Attach fin triangular braces fuselage shown making certain TE lines up notch tail plate tail wheel wire will come through should fall rudder hinge line Bore hole through balsa under neath glue yellow Nyrod guide flush tail plate Insert piece straight /16 music wire through Nyrod help line up A-in ply tail wheel plate bottom fuselage fin top Once satisfied CyA tail wheel plate place Position glue rudder eleva tor control rod guides prefer blue Sul livan Products Gold-N-Rod control link ages have drawn plans using have found no problems slop can add brace midway up fuselage desire reinforce guides Once control system set time sheet bottom fuselage A-in crossgrain balsa Check hatches proper fitting Trim necessary Attach tongues hatches fit place care fully drill screw holes through hatch maple blocks using A6 bit Tap blocks 4-40 screw ealarge hatch holes A-in diameter landing gear chose Hallco Temper-Lock rated 45 60 lb gear rated 40 45 lb would probably suf fice sturdier needed slam-and-goes gear drilled out ac cept two 4-20 nylon bolts 4-in ply landing gear plate drilled match 5A2 bit tapped 4-20 Coat threads thin Zap run tap back through Plywood tends splinter will help reinforce threads Should threads eventually strip out just drill holes out 4 use 4-20 blind nuts last steps before covering put place glue throttle pushrod guide fuel-proof firewall fuel tank compartment Any butyrate dope will nicely throttle prefer use Sullivan Products Gold-N-Rod throttle cable rather fool music wire Finish wings gluing A-in W4 balsa tips TE tips cut 1 /2 x %-in TE stock sure re 30 Model Aviation Left It very important keep fuselage straight untwisted during construction easiest method temporarily tape tail gether install firewall formers permanently join tail Right stab must level wing Measure stab tip wing tip side get alignment correct Draw centerline down top fuselage guide mount fin line up triangle absolutely certain fin/rudder hinge line inline hole tail wheel wire comes through Left firewall landing gear mount should solidly braced stage fuel tank hatch lip ply nose bottom already place Also note strips along top edge F2 create hatch seat Right Center align wing carefully measuring tip fu selage side tip tall joint Make sure top wing up far will go Sheet top rear fuselage cross-grain balsa Left Install section yellow Nyrod act bearing tail wheel wire After glue sets Nyrod install tail wheel plate Use piece scrap music wire keep Nyrod aligned glue dries plate Right Install throttle cable guide ail eron torque rod assembly Notch trailing edge stock needed torque rods can move freely through entire range move beveled edge TE tips dont reflex droop Remember wing symmetrical done cut ailerons 1 in TE stock rudder elevator /16 balsa per plans Bevel hinge surfaces shown Go ahead bore torque rod holes ailerons coat inside thin CyA harden balsa careful clog up holes parts should given final sanding before covering preference cover plane before attaching ailerons ele vator rudder technique allows thorough covering job espe cially along hinge lines ends aileron stock Snapdragons far have covered Top Flite Super MonoKote planes design lends itself well glossy finish Super Mono Kote preference covering jobs have kept simple consistent Yellow chosen main color darker colors have variedthough usually metallics covering important remember color scheme should aid telling top model bottom espe cially plane quick small Trying see fin landing gear no fun get disoriented thats dragon wing dark underbelly help out Finish up hinging control surfaces preference Lake Hobbies Easy Hinges bond securely few drops thin Zap hinge slot easily made #11 X-Acto blade hinges require no pinning mount rudder first bend 1A6 tail wheel wire accept l-in-dia tail wheel Carl Goldberg nylon tail wheel bracket mounted slot tail wheel plate aligned Nyrod sleeve Insert tail wheel wire up through mount sleeve bend right angle cut shown side view plan Bore out /l6 hole rudder accept music wire hinge rudder place Mount ailerons elevator shown Mount landing gear two -20 bolts % long will shear off during rough landings wheels decided upon 2/2-in-dia Dave Brown Products Lite Flite Wheels bored out accept 46 axle Carl Goldberg Long Nylon Control Horus Snap-Links round out control linkage attaching control horn rudder recommend attaching over hole tail wheel wire inserts rudderfor added strength business end bird rec ommend Du-Bro 6-oz fuel tank Hayes P/N AL-25 engine mount Du-Bro tank fits perfectly fuel vent lines run straight out through fire wall no bends kinks Ive learued through experience Hayes mount very strong long enough allow move engine forward aft help balancing model flying has done using Zinger 9-5 props have performed well 25 29 engines best prop have found S-29 engine 9-55 Glass Nylon Prop manufactured Yo shioka Model Factory dont recommend trying low pitch 10-in prop 29 en gine model due lack prop clear ance Please remember safe flying rule Like RC aircraft Snapdrag can will bite stick fingers prop Continued page 32 May 1988 31 wing tip trailing edge tip final touches assembling wing Sand glue surface trailing edge tip follows airfoil shape otherwise bevel cut wood will cause tip droop down reflex upward Holes drilled hatches place sanding done plane ready covering Flat surfa ces square corners make covering model breeze control surfaces tail wheel will added last Dont misled solid surfaces plane comes out very light Littlest Miracle Workshop PROFESSIONAL TOOL Send 50 SUITABLE FOR ALLfor catalog HOBBIES AND CRAFTS Makers of. Mini-Glue 74s Stray- Tray Tee Bar Mini-Saw fuff-Stuff & Jewel Stripes SCALE RADIO_CONTROL OK VINTAGE sizes214 31/a 1334 11443/i 1145 P/86s/ LEI2L APPLIED DESIGN CORP PO Box 3384 Torrance CA 90510 WHEELS CONTROL-UNE FREE-FLIGHT NEW BALLOON 21/z4/2 314514 3 As stated before Supertigre S-29 Tigers Paw muffler faster 25 engines requires roughly 1 oz tail weight washer downthrust combination plane will literally pull itself vertically out hands dont try Enya 25XTV combo seems best plane moves out quickly doesnt require added weight 05 Max 25FP solid performer ones Ive seen dont have quite power Enya Install radio choice have used Futaba Conquest 4NL Air tronics SR4R find both excel lent Note elevator rudder ser vos mounted bit offset prevent crowding pushrods on-off switch charging jack mounted fuse lage side opposite engine exhaust receiver battery area Route re ceiver antenna outside fuselage away engine exhaust usually attach fin incorporate rubberband shock cord Always wrap receiver battery pack foam rubber prevent damage vibration impact Also enclose both plastic wrap prevent exposure raw fuel should fuel tank leak first flight set up ailerons 14 throw way rudder should begin 1 elevator % can crank up later like set up throws too hot plane can get away Right now flying about 1% rud der travel ator 3/ ailerons combination plenty hot still controllable help encouragement devel opment testing plane special thanks go Charles Downing Patrick OConnell Jeff Stoltzall fellow mem bers RAMS RC club WinstonSalem King area North Carolina Charlie contributed much advice aerodynamics structure plane Hes also great story two about adventures RC Charlie encouraged write up article about Snapdragon Patrick spent hours discussing improve upon popular Fun Fly designs ideas corporated Snapdragon Patrick plane awaits Jeff has put plane through its paces stamped seal approval clear day can found banks Yadkin River making shoestring-high inverted passes down runway other members RAMS have bitten lips during some ear lier fiascoes gentlemen am grateful please keep quiet SAFE FLYING IS NO ACCIDENT Recoil Tubing Fourmost Fourmost Recoil Tubing four foot length super tough fuel proof urethane Extends tubing preformed four inch coil Four Feet attached fuel can allows placement field box fuel can convenient distance air craft boat After use tubing will retract its original space -saving form out the soil out way Price $450 No 123 Size 1/8 lD information about Recoil Tubing other innovative model products Fourmost send stamped self-addressed business size envelope FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 503 357-2732 $265 repl strips Add 20% postage SMOOTH CONTOUR 3/4234 13/4 1143 11/2414 214514 GOLDEN AGE sizes21/i 314 13 114 43/i 1145 P/8 614 Send *3 fully illustrated catalog other kite accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS
Edition: Model Aviation - 1988/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32
NO OCR TEXT it All moments kept reasonable lengths tight enough hot perform ance wanted mid-wing configuration resulted certain difficulties Considering size Snapdragon one-piece plane inev itable Radio space could also problem spars leading edge trailing edge passing through thrust line As pre viously stated wing chord turned out per fect radio installation Should wing severely damaged one-piece airplane could mean having junk whole thing Therefore strength must wing D-tube construc tion trailing edge sheeting tips squared off simplicity no det rimental effects ply dihedral doubler added just safe side though spars run straight through Trail ing edge tips used prevent possi bility aileron flutter box-style fuselage offered simplicity strength remember looks didnt count project help aero batic ability top bottom contours fuselage symmetrical hatches allow full easy access fuel tank radio equipment Formers kept minimum blunt-nose Stik-type firewall selected No nose wheels please tail dragger wide stance generous tail wheel moment will nicely Joining wing fuselage offers no big problem Just profile Control Line planes hole cut wing inserted aligned epoxy applied fin horizontal stabi lizer cut sheet balsa round out brainstorm first Snapdragon constructed using balsa fuselage keep down weight Problems developed rather quickly tail moment too short proper balance problem control throws set up too high roll rate uncontrollable end result noseheavy erratic aircraft Step step pounding after pound ing kinks worked out tail glued back control throws slowed down center gravity CU reworked last two flights sticks handed friend fellow club member Jeff Stoltz hell fly anything least once time flew although still some what sensitive After two successful easy flights tail popped off again landing Snapdragon found bottom trash can Lessons learned applied three built plywood fuse lages corrected tail moments late August Jeff went field tried again Jeff set plane up Enya 25XTV set up Su pertigre S-29 Tigers Paw muffler Jeff went up first Well hows doing After thoughtful pause Jeff responded Ill tell ya soon nerves calm down After landing settling down bit Jeff took up out practice figured now experienced Snapdragon pilot result again sweet success Takeoffs quick Outrageous climb out angles possible model turned rolled looped better expected Stall turns snaps some thing behold little planes seemed float sky snapped hearts content occasion since Left Somehow using flower logo didnt quite seem right fellow drawn up square corners certainly indicative mod els flight performance Right Control surfaces rather large results quick tight maneuvers desired Its hard see devices kept closed small piece fuel tubing something should standard high-performance model May 1988 25 given weekend several Snapdragons can found chasing darting after other up down Yadkin river bottom authors iocal club field North Carolina Left the hatches off radio fuel tank completely accessible length fuel tubing prevents plywood side rubbing through Insulation antenna Right rough landings crashes 1A-20 nylon bolts allow landing gear break away instead tearing out bottom fuselage Dave Brown Lite Flight Wheels very durable offer significant weight savings tried half snap inverted worked Vertical dives L-shaped pullouts possible Jeff bold enough try Snapdragon has exceeded expec tations size perfect transport yet large enough seen flight design has elements fair symine try results good inverted flight performance controls turned up will tie itself knots Slow down have quick sport ship 15%-thick fully symmetrical airfoil long chord provides plenty lift small plane Blunt tips keep simple big ailerons provide plenty roll response fully aerobatic Supertigre S-29 faster two models though slightly heavier Jeff s both due heavier engine weight added tail bal ancing Enya 25XTV OS Max 25FP Snapdragon balances per fectly having add ballast larger 40-size engine would too much plane Sometime intend try Enya see just what bottom end range Slow flight characteristics surpris ing generous wing control surface area allow putter along like trainer landing approaches plane flares nicely pull nose up higher will mush careful though will snap try park Remember 26 Model Aviation back Jeff Stoitz pick-uD looks like Its loaded up combat match shows just roomSniSlmollcitvIs time scent flvina uwng nuai runwey mw uiru w up unu banking away Takeoff rolls short straight No difficulty ground looping has experienced Steep climb-out gles can made strong 25 engine 1/16 BALSA 518 x 3/4 LEADING SNAPDRAGON W M CARTRETTE 1/8 BALSA K BALSA EDGE 1/4 PLYHAYES P/N AL-25 ENGINE MOUNT 25 TO30 EN G NE HALLCO L G 1/16 BALSA WEBS VERTICAL GRAIN 2-1/2 DIA WHEELS LITE FLIGHT 3/B BALSA TRI STOCK pI/USHEET N LITE PLY I/8LITE PLY SPRUCE SPARS x TOP B BOTTOM 3/8x I-I/2 BALSA TRAILING EDGE STOCK 3/32 BALSA I/4 BALSA Cutting out parts before begin construction reduces clutter workbench makes assembly go much faster easiest way cut ribs stacking shaping blanks Note notches cut leading trailing edge pieces shown picture left author says prefers pre-drill firewall formers may want wait until after model has assembled Left wing standard D-tube construction open center bay allows plenty radio room No cap strips used ribs save assembly time really arent necessary plane Right certain build right left fuselage side best lay out mirror images make sure No cutouts needed fuselage will balance still have plenty tail strength isnt trainer No ballooning tendencies have noted landings Ground handling excellent wide stance main gear tail moment combine give straight takeoff roll landing roll-out No ground looping has oc curred Prop clearance ample nineinch props surprisingly few props have broken plane low profile allows good crosswind taxiing fly ing 2-in wheel selected main gear allow rough terrain foam wheels selected keep weight down Contact ground landing results very little bouncing Like plane slam landing will bouncebut responds quickly enough allow gun engine go around reclaim pride chose use nose gear obvious reasons tend bend rough landings steering gets sloppy wear love eat props Snapdragons main gear mounted 1420 nylon bolts shear away nicely ditch have already saved few headaches Construction Before assemble thing advantageous cut out parts create kit Go ahead drill out firewall former holes Save hatches landing gear mount holes until later Stack sand W3 ribs leave W4 tips bit oversized since will sanded wing contour later balsa used hard grade used Sig Lite Ply throughout adhesive used Zap CA SbZap thinner Zap great sheeting tacking bonding balsa balsa Sb-Zap gives working time works better butt joints areas re quire strength will also need some 30-minute epoxy firewall fuselage/wing joint Flex-Zap can safely substituted some savings weight Wing Lets begin Cut 34 x x 36-in leading edge LE pieces down 22 in. Also cut 48-in-long spars 4 x -in balsa trailing edge TE down 45 Using plan carefully mark rib locations LE TE spars As shown plan use razor saw notch LE TE accept ribs W2 W3 cut notches ribs Wl butt joints Note LE pieces have buttjoined doubled piece / x x 24 -in ply important center ply doubler between marks ribs W 1 Glue LE doubler together now Make sure leading edges straight Use flat surface straight edge necessary Using flat surface lay out plans cover protective film choice prefer wax paper Ill enter debate Align lower spar TE plans Shim up spar scrap strip A6 balsa TE 5A-in blocks Making sure everything lines up plans position glue ribs W2 W3 Use building triangle ensure ribs 900 spar Now glue top spar LE Glue -in ply dihedral braces A6 balsa vertical webbing spars per plan Align glue fore aft pieces ribs W 1 Glue LE TE sheeting shown Carefully align glue place maple servo rails Pay special attention side view plans ensure tops servo rails line up level Use actual servo check proper fit Finish sheeting two center sections Wl W2 completes wing assembly now Fuselage Being sure have right left side mark locations firewall formers F2 F3 maple hatch anchor blocks tail block Cut glue 3/6-sq balsa strips indicated flush edges both fuselage halves Next attach maple hatch anchors %-in tri angular balsa pieces reinforce land ing gear mount Align two fuselage halves secure tail ends together masking tape fuselage sides straight align ment epoxy-glue firewall also glue F2 F3 Glue %-in balsa triangular braces firewall 3A6-sq strips reinforce formers run along top edge F2 Remove masking tape install tail block again checking fuselage alignment Glue A-in ply nose bottom 4-in landing gear mount -in ply strips under radio fuel tank hatch tongues will anchor Sheet top fuselage -in 28 Model Aviation S/H3/4 BALSA LEADING EDGE _zLITEPLYDBLR 3/4LO-3/4 -I ~-~IFAlLHI-#--if DIAEORALVIE BALSA S*ETififIf I/IS BALSA BRACEDTOPS BOTTOMIIIiIi SHEETING TOP -3W-3W-3W-3W-W-16-I11211A-31W-31W 3W-311 AND BOTTOM SHEETVIA BALSA SHONO3/B-IIIIII II CLARITYTOP N BOTTOM WINGPLANTOPVIEW 24x 02 I 1/16 BALSAVEHYICAL GRAINSPRUCE SPARS BALSABINGE TOP OMITTED FORI__LOCATION ------I -~-----_------H---_I MAPLEI _________________SEBSO RAILS1/H BRASS TUBING I---_-3/32 BALSAW-3 SHEET________ F-I V4 PlY 3/BSU MAPLE BLOCKS OHILLED I/LYW3/B BALSA TRI-STOCKANG TAPPED FORIA 4-40 F-I MUSIC WIRE I/A BALSA SHEET3/RI I-I/O BALSA TRAILING EDGE ClOCK SHEETVA BALSAMA0. W 2SHEETIVVUV\AxAA 0 MOUNT 11 3H BALSAiiBURN B STOC Al ENGR BASW E____H EII II IL BFUSELAGE TOP YIEWESITBOHR11 IIlL SBROD ARGE E\\~JAAAVVLIiLILI4\i 3/IS 50/RUDDER BALSA/ SA P FUSELAGE SIDEDIHEDRAL E 1/A PLY LG MOUNT FOR I/A20FINRUDDEF GOLDBERG DUBRO MEG LUE RYRUD N ARD IPPROD AENSRE MOUNTYELLOW RYROD THRUST17J77iI77i1fZE PL 51005I/H IT /HALLODSPECIFICATIONS VI//J//A Q-]WING AREAARK 5G IN LL/JLiiL LSiNJWEIGHT3-3/4 LBS F 3ME FUGHT NOSE BOTTOMTANK HATCHRADIO HATCL TYPICAL HINGE LOCATION \4STABI LIZ ER jjAj rD34DB MODEL AVIATION SNAPDRAGON MID-WING SPORT B FUN FLY PLANE DESIGNED S DRAWN BY W M CARTRETTE TRACING BY JOE DEMARCO ALL RIGHTS RESERVED VABALSA SHEET W-4 3/IA BALSA SHEET \~ II2 cross-grain balsa F3 stabilizer saddle now ready attach wing Give wing preliminary sanding carefully sand off burrs wing slots fuselage Making sure wing right side up carefully patiently slide through fuselage Take care splinter ribs dig sheeting necessary sand out wing slot some alter incidence Once wing centered aligned fu selage tack place few drops Zap Slide A-in brass tubing over ail eron torque rods bend cut shown Note different lengths brass tubes prefer ence Rocket City swivel links included %2-in torque rods Insert torque rod assemblies through fuselage along TE wing shown Re check make sure proper sides tack place CyA Glue wing place 30-minute epoxy generous inside excessive outside build up slight fillet using wet finger smear epoxy along joint Also epoxy brass tubing wing fuselage being care ful get torque rods recommend wrapping bit fiberglass around longer left brass tubing TE added strength torque rod Coat thin cyanoacrylate CyA will have very secure bond Carefully align horizontal stabilizer fuselage glue epoxy stab elevator fin rudder cut /16 hard balsa sheet certain stabilizer centered level wing 900 fuselage center line dry glue %-in triangular braces support stab A-in ply tail plate Attach fin triangular braces fuselage shown making certain TE lines up notch tail plate tail wheel wire will come through should fall rudder hinge line Bore hole through balsa under neath glue yellow Nyrod guide flush tail plate Insert piece straight /16 music wire through Nyrod help line up A-in ply tail wheel plate bottom fuselage fin top Once satisfied CyA tail wheel plate place Position glue rudder eleva tor control rod guides prefer blue Sul livan Products Gold-N-Rod control link ages have drawn plans using have found no problems slop can add brace midway up fuselage desire reinforce guides Once control system set time sheet bottom fuselage A-in crossgrain balsa Check hatches proper fitting Trim necessary Attach tongues hatches fit place care fully drill screw holes through hatch maple blocks using A6 bit Tap blocks 4-40 screw ealarge hatch holes A-in diameter landing gear chose Hallco Temper-Lock rated 45 60 lb gear rated 40 45 lb would probably suf fice sturdier needed slam-and-goes gear drilled out ac cept two 4-20 nylon bolts 4-in ply landing gear plate drilled match 5A2 bit tapped 4-20 Coat threads thin Zap run tap back through Plywood tends splinter will help reinforce threads Should threads eventually strip out just drill holes out 4 use 4-20 blind nuts last steps before covering put place glue throttle pushrod guide fuel-proof firewall fuel tank compartment Any butyrate dope will nicely throttle prefer use Sullivan Products Gold-N-Rod throttle cable rather fool music wire Finish wings gluing A-in W4 balsa tips TE tips cut 1 /2 x %-in TE stock sure re 30 Model Aviation Left It very important keep fuselage straight untwisted during construction easiest method temporarily tape tail gether install firewall formers permanently join tail Right stab must level wing Measure stab tip wing tip side get alignment correct Draw centerline down top fuselage guide mount fin line up triangle absolutely certain fin/rudder hinge line inline hole tail wheel wire comes through Left firewall landing gear mount should solidly braced stage fuel tank hatch lip ply nose bottom already place Also note strips along top edge F2 create hatch seat Right Center align wing carefully measuring tip fu selage side tip tall joint Make sure top wing up far will go Sheet top rear fuselage cross-grain balsa Left Install section yellow Nyrod act bearing tail wheel wire After glue sets Nyrod install tail wheel plate Use piece scrap music wire keep Nyrod aligned glue dries plate Right Install throttle cable guide ail eron torque rod assembly Notch trailing edge stock needed torque rods can move freely through entire range move beveled edge TE tips dont reflex droop Remember wing symmetrical done cut ailerons 1 in TE stock rudder elevator /16 balsa per plans Bevel hinge surfaces shown Go ahead bore torque rod holes ailerons coat inside thin CyA harden balsa careful clog up holes parts should given final sanding before covering preference cover plane before attaching ailerons ele vator rudder technique allows thorough covering job espe cially along hinge lines ends aileron stock Snapdragons far have covered Top Flite Super MonoKote planes design lends itself well glossy finish Super Mono Kote preference covering jobs have kept simple consistent Yellow chosen main color darker colors have variedthough usually metallics covering important remember color scheme should aid telling top model bottom espe cially plane quick small Trying see fin landing gear no fun get disoriented thats dragon wing dark underbelly help out Finish up hinging control surfaces preference Lake Hobbies Easy Hinges bond securely few drops thin Zap hinge slot easily made #11 X-Acto blade hinges require no pinning mount rudder first bend 1A6 tail wheel wire accept l-in-dia tail wheel Carl Goldberg nylon tail wheel bracket mounted slot tail wheel plate aligned Nyrod sleeve Insert tail wheel wire up through mount sleeve bend right angle cut shown side view plan Bore out /l6 hole rudder accept music wire hinge rudder place Mount ailerons elevator shown Mount landing gear two -20 bolts % long will shear off during rough landings wheels decided upon 2/2-in-dia Dave Brown Products Lite Flite Wheels bored out accept 46 axle Carl Goldberg Long Nylon Control Horus Snap-Links round out control linkage attaching control horn rudder recommend attaching over hole tail wheel wire inserts rudderfor added strength business end bird rec ommend Du-Bro 6-oz fuel tank Hayes P/N AL-25 engine mount Du-Bro tank fits perfectly fuel vent lines run straight out through fire wall no bends kinks Ive learued through experience Hayes mount very strong long enough allow move engine forward aft help balancing model flying has done using Zinger 9-5 props have performed well 25 29 engines best prop have found S-29 engine 9-55 Glass Nylon Prop manufactured Yo shioka Model Factory dont recommend trying low pitch 10-in prop 29 en gine model due lack prop clear ance Please remember safe flying rule Like RC aircraft Snapdrag can will bite stick fingers prop Continued page 32 May 1988 31 wing tip trailing edge tip final touches assembling wing Sand glue surface trailing edge tip follows airfoil shape otherwise bevel cut wood will cause tip droop down reflex upward Holes drilled hatches place sanding done plane ready covering Flat surfa ces square corners make covering model breeze control surfaces tail wheel will added last Dont misled solid surfaces plane comes out very light Littlest Miracle Workshop PROFESSIONAL TOOL Send 50 SUITABLE FOR ALLfor catalog HOBBIES AND CRAFTS Makers of. Mini-Glue 74s Stray- Tray Tee Bar Mini-Saw fuff-Stuff & Jewel Stripes SCALE RADIO_CONTROL OK VINTAGE sizes214 31/a 1334 11443/i 1145 P/86s/ LEI2L APPLIED DESIGN CORP PO Box 3384 Torrance CA 90510 WHEELS CONTROL-UNE FREE-FLIGHT NEW BALLOON 21/z4/2 314514 3 As stated before Supertigre S-29 Tigers Paw muffler faster 25 engines requires roughly 1 oz tail weight washer downthrust combination plane will literally pull itself vertically out hands dont try Enya 25XTV combo seems best plane moves out quickly doesnt require added weight 05 Max 25FP solid performer ones Ive seen dont have quite power Enya Install radio choice have used Futaba Conquest 4NL Air tronics SR4R find both excel lent Note elevator rudder ser vos mounted bit offset prevent crowding pushrods on-off switch charging jack mounted fuse lage side opposite engine exhaust receiver battery area Route re ceiver antenna outside fuselage away engine exhaust usually attach fin incorporate rubberband shock cord Always wrap receiver battery pack foam rubber prevent damage vibration impact Also enclose both plastic wrap prevent exposure raw fuel should fuel tank leak first flight set up ailerons 14 throw way rudder should begin 1 elevator % can crank up later like set up throws too hot plane can get away Right now flying about 1% rud der travel ator 3/ ailerons combination plenty hot still controllable help encouragement devel opment testing plane special thanks go Charles Downing Patrick OConnell Jeff Stoltzall fellow mem bers RAMS RC club WinstonSalem King area North Carolina Charlie contributed much advice aerodynamics structure plane Hes also great story two about adventures RC Charlie encouraged write up article about Snapdragon Patrick spent hours discussing improve upon popular Fun Fly designs ideas corporated Snapdragon Patrick plane awaits Jeff has put plane through its paces stamped seal approval clear day can found banks Yadkin River making shoestring-high inverted passes down runway other members RAMS have bitten lips during some ear lier fiascoes gentlemen am grateful please keep quiet SAFE FLYING IS NO ACCIDENT Recoil Tubing Fourmost Fourmost Recoil Tubing four foot length super tough fuel proof urethane Extends tubing preformed four inch coil Four Feet attached fuel can allows placement field box fuel can convenient distance air craft boat After use tubing will retract its original space -saving form out the soil out way Price $450 No 123 Size 1/8 lD information about Recoil Tubing other innovative model products Fourmost send stamped self-addressed business size envelope FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 503 357-2732 $265 repl strips Add 20% postage SMOOTH CONTOUR 3/4234 13/4 1143 11/2414 214514 GOLDEN AGE sizes21/i 314 13 114 43/i 1145 P/8 614 Send *3 fully illustrated catalog other kite accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS
Edition: Model Aviation - 1988/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32
NO OCR TEXT it All moments kept reasonable lengths tight enough hot perform ance wanted mid-wing configuration resulted certain difficulties Considering size Snapdragon one-piece plane inev itable Radio space could also problem spars leading edge trailing edge passing through thrust line As pre viously stated wing chord turned out per fect radio installation Should wing severely damaged one-piece airplane could mean having junk whole thing Therefore strength must wing D-tube construc tion trailing edge sheeting tips squared off simplicity no det rimental effects ply dihedral doubler added just safe side though spars run straight through Trail ing edge tips used prevent possi bility aileron flutter box-style fuselage offered simplicity strength remember looks didnt count project help aero batic ability top bottom contours fuselage symmetrical hatches allow full easy access fuel tank radio equipment Formers kept minimum blunt-nose Stik-type firewall selected No nose wheels please tail dragger wide stance generous tail wheel moment will nicely Joining wing fuselage offers no big problem Just profile Control Line planes hole cut wing inserted aligned epoxy applied fin horizontal stabi lizer cut sheet balsa round out brainstorm first Snapdragon constructed using balsa fuselage keep down weight Problems developed rather quickly tail moment too short proper balance problem control throws set up too high roll rate uncontrollable end result noseheavy erratic aircraft Step step pounding after pound ing kinks worked out tail glued back control throws slowed down center gravity CU reworked last two flights sticks handed friend fellow club member Jeff Stoltz hell fly anything least once time flew although still some what sensitive After two successful easy flights tail popped off again landing Snapdragon found bottom trash can Lessons learned applied three built plywood fuse lages corrected tail moments late August Jeff went field tried again Jeff set plane up Enya 25XTV set up Su pertigre S-29 Tigers Paw muffler Jeff went up first Well hows doing After thoughtful pause Jeff responded Ill tell ya soon nerves calm down After landing settling down bit Jeff took up out practice figured now experienced Snapdragon pilot result again sweet success Takeoffs quick Outrageous climb out angles possible model turned rolled looped better expected Stall turns snaps some thing behold little planes seemed float sky snapped hearts content occasion since Left Somehow using flower logo didnt quite seem right fellow drawn up square corners certainly indicative mod els flight performance Right Control surfaces rather large results quick tight maneuvers desired Its hard see devices kept closed small piece fuel tubing something should standard high-performance model May 1988 25 given weekend several Snapdragons can found chasing darting after other up down Yadkin river bottom authors iocal club field North Carolina Left the hatches off radio fuel tank completely accessible length fuel tubing prevents plywood side rubbing through Insulation antenna Right rough landings crashes 1A-20 nylon bolts allow landing gear break away instead tearing out bottom fuselage Dave Brown Lite Flight Wheels very durable offer significant weight savings tried half snap inverted worked Vertical dives L-shaped pullouts possible Jeff bold enough try Snapdragon has exceeded expec tations size perfect transport yet large enough seen flight design has elements fair symine try results good inverted flight performance controls turned up will tie itself knots Slow down have quick sport ship 15%-thick fully symmetrical airfoil long chord provides plenty lift small plane Blunt tips keep simple big ailerons provide plenty roll response fully aerobatic Supertigre S-29 faster two models though slightly heavier Jeff s both due heavier engine weight added tail bal ancing Enya 25XTV OS Max 25FP Snapdragon balances per fectly having add ballast larger 40-size engine would too much plane Sometime intend try Enya see just what bottom end range Slow flight characteristics surpris ing generous wing control surface area allow putter along like trainer landing approaches plane flares nicely pull nose up higher will mush careful though will snap try park Remember 26 Model Aviation back Jeff Stoitz pick-uD looks like Its loaded up combat match shows just roomSniSlmollcitvIs time scent flvina uwng nuai runwey mw uiru w up unu banking away Takeoff rolls short straight No difficulty ground looping has experienced Steep climb-out gles can made strong 25 engine 1/16 BALSA 518 x 3/4 LEADING SNAPDRAGON W M CARTRETTE 1/8 BALSA K BALSA EDGE 1/4 PLYHAYES P/N AL-25 ENGINE MOUNT 25 TO30 EN G NE HALLCO L G 1/16 BALSA WEBS VERTICAL GRAIN 2-1/2 DIA WHEELS LITE FLIGHT 3/B BALSA TRI STOCK pI/USHEET N LITE PLY I/8LITE PLY SPRUCE SPARS x TOP B BOTTOM 3/8x I-I/2 BALSA TRAILING EDGE STOCK 3/32 BALSA I/4 BALSA Cutting out parts before begin construction reduces clutter workbench makes assembly go much faster easiest way cut ribs stacking shaping blanks Note notches cut leading trailing edge pieces shown picture left author says prefers pre-drill firewall formers may want wait until after model has assembled Left wing standard D-tube construction open center bay allows plenty radio room No cap strips used ribs save assembly time really arent necessary plane Right certain build right left fuselage side best lay out mirror images make sure No cutouts needed fuselage will balance still have plenty tail strength isnt trainer No ballooning tendencies have noted landings Ground handling excellent wide stance main gear tail moment combine give straight takeoff roll landing roll-out No ground looping has oc curred Prop clearance ample nineinch props surprisingly few props have broken plane low profile allows good crosswind taxiing fly ing 2-in wheel selected main gear allow rough terrain foam wheels selected keep weight down Contact ground landing results very little bouncing Like plane slam landing will bouncebut responds quickly enough allow gun engine go around reclaim pride chose use nose gear obvious reasons tend bend rough landings steering gets sloppy wear love eat props Snapdragons main gear mounted 1420 nylon bolts shear away nicely ditch have already saved few headaches Construction Before assemble thing advantageous cut out parts create kit Go ahead drill out firewall former holes Save hatches landing gear mount holes until later Stack sand W3 ribs leave W4 tips bit oversized since will sanded wing contour later balsa used hard grade used Sig Lite Ply throughout adhesive used Zap CA SbZap thinner Zap great sheeting tacking bonding balsa balsa Sb-Zap gives working time works better butt joints areas re quire strength will also need some 30-minute epoxy firewall fuselage/wing joint Flex-Zap can safely substituted some savings weight Wing Lets begin Cut 34 x x 36-in leading edge LE pieces down 22 in. Also cut 48-in-long spars 4 x -in balsa trailing edge TE down 45 Using plan carefully mark rib locations LE TE spars As shown plan use razor saw notch LE TE accept ribs W2 W3 cut notches ribs Wl butt joints Note LE pieces have buttjoined doubled piece / x x 24 -in ply important center ply doubler between marks ribs W 1 Glue LE doubler together now Make sure leading edges straight Use flat surface straight edge necessary Using flat surface lay out plans cover protective film choice prefer wax paper Ill enter debate Align lower spar TE plans Shim up spar scrap strip A6 balsa TE 5A-in blocks Making sure everything lines up plans position glue ribs W2 W3 Use building triangle ensure ribs 900 spar Now glue top spar LE Glue -in ply dihedral braces A6 balsa vertical webbing spars per plan Align glue fore aft pieces ribs W 1 Glue LE TE sheeting shown Carefully align glue place maple servo rails Pay special attention side view plans ensure tops servo rails line up level Use actual servo check proper fit Finish sheeting two center sections Wl W2 completes wing assembly now Fuselage Being sure have right left side mark locations firewall formers F2 F3 maple hatch anchor blocks tail block Cut glue 3/6-sq balsa strips indicated flush edges both fuselage halves Next attach maple hatch anchors %-in tri angular balsa pieces reinforce land ing gear mount Align two fuselage halves secure tail ends together masking tape fuselage sides straight align ment epoxy-glue firewall also glue F2 F3 Glue %-in balsa triangular braces firewall 3A6-sq strips reinforce formers run along top edge F2 Remove masking tape install tail block again checking fuselage alignment Glue A-in ply nose bottom 4-in landing gear mount -in ply strips under radio fuel tank hatch tongues will anchor Sheet top fuselage -in 28 Model Aviation S/H3/4 BALSA LEADING EDGE _zLITEPLYDBLR 3/4LO-3/4 -I ~-~IFAlLHI-#--if DIAEORALVIE BALSA S*ETififIf I/IS BALSA BRACEDTOPS BOTTOMIIIiIi SHEETING TOP -3W-3W-3W-3W-W-16-I11211A-31W-31W 3W-311 AND BOTTOM SHEETVIA BALSA SHONO3/B-IIIIII II CLARITYTOP N BOTTOM WINGPLANTOPVIEW 24x 02 I 1/16 BALSAVEHYICAL GRAINSPRUCE SPARS BALSABINGE TOP OMITTED FORI__LOCATION ------I -~-----_------H---_I MAPLEI _________________SEBSO RAILS1/H BRASS TUBING I---_-3/32 BALSAW-3 SHEET________ F-I V4 PlY 3/BSU MAPLE BLOCKS OHILLED I/LYW3/B BALSA TRI-STOCKANG TAPPED FORIA 4-40 F-I MUSIC WIRE I/A BALSA SHEET3/RI I-I/O BALSA TRAILING EDGE ClOCK SHEETVA BALSAMA0. W 2SHEETIVVUV\AxAA 0 MOUNT 11 3H BALSAiiBURN B STOC Al ENGR BASW E____H EII II IL BFUSELAGE TOP YIEWESITBOHR11 IIlL SBROD ARGE E\\~JAAAVVLIiLILI4\i 3/IS 50/RUDDER BALSA/ SA P FUSELAGE SIDEDIHEDRAL E 1/A PLY LG MOUNT FOR I/A20FINRUDDEF GOLDBERG DUBRO MEG LUE RYRUD N ARD IPPROD AENSRE MOUNTYELLOW RYROD THRUST17J77iI77i1fZE PL 51005I/H IT /HALLODSPECIFICATIONS VI//J//A Q-]WING AREAARK 5G IN LL/JLiiL LSiNJWEIGHT3-3/4 LBS F 3ME FUGHT NOSE BOTTOMTANK HATCHRADIO HATCL TYPICAL HINGE LOCATION \4STABI LIZ ER jjAj rD34DB MODEL AVIATION SNAPDRAGON MID-WING SPORT B FUN FLY PLANE DESIGNED S DRAWN BY W M CARTRETTE TRACING BY JOE DEMARCO ALL RIGHTS RESERVED VABALSA SHEET W-4 3/IA BALSA SHEET \~ II2 cross-grain balsa F3 stabilizer saddle now ready attach wing Give wing preliminary sanding carefully sand off burrs wing slots fuselage Making sure wing right side up carefully patiently slide through fuselage Take care splinter ribs dig sheeting necessary sand out wing slot some alter incidence Once wing centered aligned fu selage tack place few drops Zap Slide A-in brass tubing over ail eron torque rods bend cut shown Note different lengths brass tubes prefer ence Rocket City swivel links included %2-in torque rods Insert torque rod assemblies through fuselage along TE wing shown Re check make sure proper sides tack place CyA Glue wing place 30-minute epoxy generous inside excessive outside build up slight fillet using wet finger smear epoxy along joint Also epoxy brass tubing wing fuselage being care ful get torque rods recommend wrapping bit fiberglass around longer left brass tubing TE added strength torque rod Coat thin cyanoacrylate CyA will have very secure bond Carefully align horizontal stabilizer fuselage glue epoxy stab elevator fin rudder cut /16 hard balsa sheet certain stabilizer centered level wing 900 fuselage center line dry glue %-in triangular braces support stab A-in ply tail plate Attach fin triangular braces fuselage shown making certain TE lines up notch tail plate tail wheel wire will come through should fall rudder hinge line Bore hole through balsa under neath glue yellow Nyrod guide flush tail plate Insert piece straight /16 music wire through Nyrod help line up A-in ply tail wheel plate bottom fuselage fin top Once satisfied CyA tail wheel plate place Position glue rudder eleva tor control rod guides prefer blue Sul livan Products Gold-N-Rod control link ages have drawn plans using have found no problems slop can add brace midway up fuselage desire reinforce guides Once control system set time sheet bottom fuselage A-in crossgrain balsa Check hatches proper fitting Trim necessary Attach tongues hatches fit place care fully drill screw holes through hatch maple blocks using A6 bit Tap blocks 4-40 screw ealarge hatch holes A-in diameter landing gear chose Hallco Temper-Lock rated 45 60 lb gear rated 40 45 lb would probably suf fice sturdier needed slam-and-goes gear drilled out ac cept two 4-20 nylon bolts 4-in ply landing gear plate drilled match 5A2 bit tapped 4-20 Coat threads thin Zap run tap back through Plywood tends splinter will help reinforce threads Should threads eventually strip out just drill holes out 4 use 4-20 blind nuts last steps before covering put place glue throttle pushrod guide fuel-proof firewall fuel tank compartment Any butyrate dope will nicely throttle prefer use Sullivan Products Gold-N-Rod throttle cable rather fool music wire Finish wings gluing A-in W4 balsa tips TE tips cut 1 /2 x %-in TE stock sure re 30 Model Aviation Left It very important keep fuselage straight untwisted during construction easiest method temporarily tape tail gether install firewall formers permanently join tail Right stab must level wing Measure stab tip wing tip side get alignment correct Draw centerline down top fuselage guide mount fin line up triangle absolutely certain fin/rudder hinge line inline hole tail wheel wire comes through Left firewall landing gear mount should solidly braced stage fuel tank hatch lip ply nose bottom already place Also note strips along top edge F2 create hatch seat Right Center align wing carefully measuring tip fu selage side tip tall joint Make sure top wing up far will go Sheet top rear fuselage cross-grain balsa Left Install section yellow Nyrod act bearing tail wheel wire After glue sets Nyrod install tail wheel plate Use piece scrap music wire keep Nyrod aligned glue dries plate Right Install throttle cable guide ail eron torque rod assembly Notch trailing edge stock needed torque rods can move freely through entire range move beveled edge TE tips dont reflex droop Remember wing symmetrical done cut ailerons 1 in TE stock rudder elevator /16 balsa per plans Bevel hinge surfaces shown Go ahead bore torque rod holes ailerons coat inside thin CyA harden balsa careful clog up holes parts should given final sanding before covering preference cover plane before attaching ailerons ele vator rudder technique allows thorough covering job espe cially along hinge lines ends aileron stock Snapdragons far have covered Top Flite Super MonoKote planes design lends itself well glossy finish Super Mono Kote preference covering jobs have kept simple consistent Yellow chosen main color darker colors have variedthough usually metallics covering important remember color scheme should aid telling top model bottom espe cially plane quick small Trying see fin landing gear no fun get disoriented thats dragon wing dark underbelly help out Finish up hinging control surfaces preference Lake Hobbies Easy Hinges bond securely few drops thin Zap hinge slot easily made #11 X-Acto blade hinges require no pinning mount rudder first bend 1A6 tail wheel wire accept l-in-dia tail wheel Carl Goldberg nylon tail wheel bracket mounted slot tail wheel plate aligned Nyrod sleeve Insert tail wheel wire up through mount sleeve bend right angle cut shown side view plan Bore out /l6 hole rudder accept music wire hinge rudder place Mount ailerons elevator shown Mount landing gear two -20 bolts % long will shear off during rough landings wheels decided upon 2/2-in-dia Dave Brown Products Lite Flite Wheels bored out accept 46 axle Carl Goldberg Long Nylon Control Horus Snap-Links round out control linkage attaching control horn rudder recommend attaching over hole tail wheel wire inserts rudderfor added strength business end bird rec ommend Du-Bro 6-oz fuel tank Hayes P/N AL-25 engine mount Du-Bro tank fits perfectly fuel vent lines run straight out through fire wall no bends kinks Ive learued through experience Hayes mount very strong long enough allow move engine forward aft help balancing model flying has done using Zinger 9-5 props have performed well 25 29 engines best prop have found S-29 engine 9-55 Glass Nylon Prop manufactured Yo shioka Model Factory dont recommend trying low pitch 10-in prop 29 en gine model due lack prop clear ance Please remember safe flying rule Like RC aircraft Snapdrag can will bite stick fingers prop Continued page 32 May 1988 31 wing tip trailing edge tip final touches assembling wing Sand glue surface trailing edge tip follows airfoil shape otherwise bevel cut wood will cause tip droop down reflex upward Holes drilled hatches place sanding done plane ready covering Flat surfa ces square corners make covering model breeze control surfaces tail wheel will added last Dont misled solid surfaces plane comes out very light Littlest Miracle Workshop PROFESSIONAL TOOL Send 50 SUITABLE FOR ALLfor catalog HOBBIES AND CRAFTS Makers of. Mini-Glue 74s Stray- Tray Tee Bar Mini-Saw fuff-Stuff & Jewel Stripes SCALE RADIO_CONTROL OK VINTAGE sizes214 31/a 1334 11443/i 1145 P/86s/ LEI2L APPLIED DESIGN CORP PO Box 3384 Torrance CA 90510 WHEELS CONTROL-UNE FREE-FLIGHT NEW BALLOON 21/z4/2 314514 3 As stated before Supertigre S-29 Tigers Paw muffler faster 25 engines requires roughly 1 oz tail weight washer downthrust combination plane will literally pull itself vertically out hands dont try Enya 25XTV combo seems best plane moves out quickly doesnt require added weight 05 Max 25FP solid performer ones Ive seen dont have quite power Enya Install radio choice have used Futaba Conquest 4NL Air tronics SR4R find both excel lent Note elevator rudder ser vos mounted bit offset prevent crowding pushrods on-off switch charging jack mounted fuse lage side opposite engine exhaust receiver battery area Route re ceiver antenna outside fuselage away engine exhaust usually attach fin incorporate rubberband shock cord Always wrap receiver battery pack foam rubber prevent damage vibration impact Also enclose both plastic wrap prevent exposure raw fuel should fuel tank leak first flight set up ailerons 14 throw way rudder should begin 1 elevator % can crank up later like set up throws too hot plane can get away Right now flying about 1% rud der travel ator 3/ ailerons combination plenty hot still controllable help encouragement devel opment testing plane special thanks go Charles Downing Patrick OConnell Jeff Stoltzall fellow mem bers RAMS RC club WinstonSalem King area North Carolina Charlie contributed much advice aerodynamics structure plane Hes also great story two about adventures RC Charlie encouraged write up article about Snapdragon Patrick spent hours discussing improve upon popular Fun Fly designs ideas corporated Snapdragon Patrick plane awaits Jeff has put plane through its paces stamped seal approval clear day can found banks Yadkin River making shoestring-high inverted passes down runway other members RAMS have bitten lips during some ear lier fiascoes gentlemen am grateful please keep quiet SAFE FLYING IS NO ACCIDENT Recoil Tubing Fourmost Fourmost Recoil Tubing four foot length super tough fuel proof urethane Extends tubing preformed four inch coil Four Feet attached fuel can allows placement field box fuel can convenient distance air craft boat After use tubing will retract its original space -saving form out the soil out way Price $450 No 123 Size 1/8 lD information about Recoil Tubing other innovative model products Fourmost send stamped self-addressed business size envelope FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 503 357-2732 $265 repl strips Add 20% postage SMOOTH CONTOUR 3/4234 13/4 1143 11/2414 214514 GOLDEN AGE sizes21/i 314 13 114 43/i 1145 P/8 614 Send *3 fully illustrated catalog other kite accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS
Edition: Model Aviation - 1988/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32
NO OCR TEXT it All moments kept reasonable lengths tight enough hot perform ance wanted mid-wing configuration resulted certain difficulties Considering size Snapdragon one-piece plane inev itable Radio space could also problem spars leading edge trailing edge passing through thrust line As pre viously stated wing chord turned out per fect radio installation Should wing severely damaged one-piece airplane could mean having junk whole thing Therefore strength must wing D-tube construc tion trailing edge sheeting tips squared off simplicity no det rimental effects ply dihedral doubler added just safe side though spars run straight through Trail ing edge tips used prevent possi bility aileron flutter box-style fuselage offered simplicity strength remember looks didnt count project help aero batic ability top bottom contours fuselage symmetrical hatches allow full easy access fuel tank radio equipment Formers kept minimum blunt-nose Stik-type firewall selected No nose wheels please tail dragger wide stance generous tail wheel moment will nicely Joining wing fuselage offers no big problem Just profile Control Line planes hole cut wing inserted aligned epoxy applied fin horizontal stabi lizer cut sheet balsa round out brainstorm first Snapdragon constructed using balsa fuselage keep down weight Problems developed rather quickly tail moment too short proper balance problem control throws set up too high roll rate uncontrollable end result noseheavy erratic aircraft Step step pounding after pound ing kinks worked out tail glued back control throws slowed down center gravity CU reworked last two flights sticks handed friend fellow club member Jeff Stoltz hell fly anything least once time flew although still some what sensitive After two successful easy flights tail popped off again landing Snapdragon found bottom trash can Lessons learned applied three built plywood fuse lages corrected tail moments late August Jeff went field tried again Jeff set plane up Enya 25XTV set up Su pertigre S-29 Tigers Paw muffler Jeff went up first Well hows doing After thoughtful pause Jeff responded Ill tell ya soon nerves calm down After landing settling down bit Jeff took up out practice figured now experienced Snapdragon pilot result again sweet success Takeoffs quick Outrageous climb out angles possible model turned rolled looped better expected Stall turns snaps some thing behold little planes seemed float sky snapped hearts content occasion since Left Somehow using flower logo didnt quite seem right fellow drawn up square corners certainly indicative mod els flight performance Right Control surfaces rather large results quick tight maneuvers desired Its hard see devices kept closed small piece fuel tubing something should standard high-performance model May 1988 25 given weekend several Snapdragons can found chasing darting after other up down Yadkin river bottom authors iocal club field North Carolina Left the hatches off radio fuel tank completely accessible length fuel tubing prevents plywood side rubbing through Insulation antenna Right rough landings crashes 1A-20 nylon bolts allow landing gear break away instead tearing out bottom fuselage Dave Brown Lite Flight Wheels very durable offer significant weight savings tried half snap inverted worked Vertical dives L-shaped pullouts possible Jeff bold enough try Snapdragon has exceeded expec tations size perfect transport yet large enough seen flight design has elements fair symine try results good inverted flight performance controls turned up will tie itself knots Slow down have quick sport ship 15%-thick fully symmetrical airfoil long chord provides plenty lift small plane Blunt tips keep simple big ailerons provide plenty roll response fully aerobatic Supertigre S-29 faster two models though slightly heavier Jeff s both due heavier engine weight added tail bal ancing Enya 25XTV OS Max 25FP Snapdragon balances per fectly having add ballast larger 40-size engine would too much plane Sometime intend try Enya see just what bottom end range Slow flight characteristics surpris ing generous wing control surface area allow putter along like trainer landing approaches plane flares nicely pull nose up higher will mush careful though will snap try park Remember 26 Model Aviation back Jeff Stoitz pick-uD looks like Its loaded up combat match shows just roomSniSlmollcitvIs time scent flvina uwng nuai runwey mw uiru w up unu banking away Takeoff rolls short straight No difficulty ground looping has experienced Steep climb-out gles can made strong 25 engine 1/16 BALSA 518 x 3/4 LEADING SNAPDRAGON W M CARTRETTE 1/8 BALSA K BALSA EDGE 1/4 PLYHAYES P/N AL-25 ENGINE MOUNT 25 TO30 EN G NE HALLCO L G 1/16 BALSA WEBS VERTICAL GRAIN 2-1/2 DIA WHEELS LITE FLIGHT 3/B BALSA TRI STOCK pI/USHEET N LITE PLY I/8LITE PLY SPRUCE SPARS x TOP B BOTTOM 3/8x I-I/2 BALSA TRAILING EDGE STOCK 3/32 BALSA I/4 BALSA Cutting out parts before begin construction reduces clutter workbench makes assembly go much faster easiest way cut ribs stacking shaping blanks Note notches cut leading trailing edge pieces shown picture left author says prefers pre-drill firewall formers may want wait until after model has assembled Left wing standard D-tube construction open center bay allows plenty radio room No cap strips used ribs save assembly time really arent necessary plane Right certain build right left fuselage side best lay out mirror images make sure No cutouts needed fuselage will balance still have plenty tail strength isnt trainer No ballooning tendencies have noted landings Ground handling excellent wide stance main gear tail moment combine give straight takeoff roll landing roll-out No ground looping has oc curred Prop clearance ample nineinch props surprisingly few props have broken plane low profile allows good crosswind taxiing fly ing 2-in wheel selected main gear allow rough terrain foam wheels selected keep weight down Contact ground landing results very little bouncing Like plane slam landing will bouncebut responds quickly enough allow gun engine go around reclaim pride chose use nose gear obvious reasons tend bend rough landings steering gets sloppy wear love eat props Snapdragons main gear mounted 1420 nylon bolts shear away nicely ditch have already saved few headaches Construction Before assemble thing advantageous cut out parts create kit Go ahead drill out firewall former holes Save hatches landing gear mount holes until later Stack sand W3 ribs leave W4 tips bit oversized since will sanded wing contour later balsa used hard grade used Sig Lite Ply throughout adhesive used Zap CA SbZap thinner Zap great sheeting tacking bonding balsa balsa Sb-Zap gives working time works better butt joints areas re quire strength will also need some 30-minute epoxy firewall fuselage/wing joint Flex-Zap can safely substituted some savings weight Wing Lets begin Cut 34 x x 36-in leading edge LE pieces down 22 in. Also cut 48-in-long spars 4 x -in balsa trailing edge TE down 45 Using plan carefully mark rib locations LE TE spars As shown plan use razor saw notch LE TE accept ribs W2 W3 cut notches ribs Wl butt joints Note LE pieces have buttjoined doubled piece / x x 24 -in ply important center ply doubler between marks ribs W 1 Glue LE doubler together now Make sure leading edges straight Use flat surface straight edge necessary Using flat surface lay out plans cover protective film choice prefer wax paper Ill enter debate Align lower spar TE plans Shim up spar scrap strip A6 balsa TE 5A-in blocks Making sure everything lines up plans position glue ribs W2 W3 Use building triangle ensure ribs 900 spar Now glue top spar LE Glue -in ply dihedral braces A6 balsa vertical webbing spars per plan Align glue fore aft pieces ribs W 1 Glue LE TE sheeting shown Carefully align glue place maple servo rails Pay special attention side view plans ensure tops servo rails line up level Use actual servo check proper fit Finish sheeting two center sections Wl W2 completes wing assembly now Fuselage Being sure have right left side mark locations firewall formers F2 F3 maple hatch anchor blocks tail block Cut glue 3/6-sq balsa strips indicated flush edges both fuselage halves Next attach maple hatch anchors %-in tri angular balsa pieces reinforce land ing gear mount Align two fuselage halves secure tail ends together masking tape fuselage sides straight align ment epoxy-glue firewall also glue F2 F3 Glue %-in balsa triangular braces firewall 3A6-sq strips reinforce formers run along top edge F2 Remove masking tape install tail block again checking fuselage alignment Glue A-in ply nose bottom 4-in landing gear mount -in ply strips under radio fuel tank hatch tongues will anchor Sheet top fuselage -in 28 Model Aviation S/H3/4 BALSA LEADING EDGE _zLITEPLYDBLR 3/4LO-3/4 -I ~-~IFAlLHI-#--if DIAEORALVIE BALSA S*ETififIf I/IS BALSA BRACEDTOPS BOTTOMIIIiIi SHEETING TOP -3W-3W-3W-3W-W-16-I11211A-31W-31W 3W-311 AND BOTTOM SHEETVIA BALSA SHONO3/B-IIIIII II CLARITYTOP N BOTTOM WINGPLANTOPVIEW 24x 02 I 1/16 BALSAVEHYICAL GRAINSPRUCE SPARS BALSABINGE TOP OMITTED FORI__LOCATION ------I -~-----_------H---_I MAPLEI _________________SEBSO RAILS1/H BRASS TUBING I---_-3/32 BALSAW-3 SHEET________ F-I V4 PlY 3/BSU MAPLE BLOCKS OHILLED I/LYW3/B BALSA TRI-STOCKANG TAPPED FORIA 4-40 F-I MUSIC WIRE I/A BALSA SHEET3/RI I-I/O BALSA TRAILING EDGE ClOCK SHEETVA BALSAMA0. W 2SHEETIVVUV\AxAA 0 MOUNT 11 3H BALSAiiBURN B STOC Al ENGR BASW E____H EII II IL BFUSELAGE TOP YIEWESITBOHR11 IIlL SBROD ARGE E\\~JAAAVVLIiLILI4\i 3/IS 50/RUDDER BALSA/ SA P FUSELAGE SIDEDIHEDRAL E 1/A PLY LG MOUNT FOR I/A20FINRUDDEF GOLDBERG DUBRO MEG LUE RYRUD N ARD IPPROD AENSRE MOUNTYELLOW RYROD THRUST17J77iI77i1fZE PL 51005I/H IT /HALLODSPECIFICATIONS VI//J//A Q-]WING AREAARK 5G IN LL/JLiiL LSiNJWEIGHT3-3/4 LBS F 3ME FUGHT NOSE BOTTOMTANK HATCHRADIO HATCL TYPICAL HINGE LOCATION \4STABI LIZ ER jjAj rD34DB MODEL AVIATION SNAPDRAGON MID-WING SPORT B FUN FLY PLANE DESIGNED S DRAWN BY W M CARTRETTE TRACING BY JOE DEMARCO ALL RIGHTS RESERVED VABALSA SHEET W-4 3/IA BALSA SHEET \~ II2 cross-grain balsa F3 stabilizer saddle now ready attach wing Give wing preliminary sanding carefully sand off burrs wing slots fuselage Making sure wing right side up carefully patiently slide through fuselage Take care splinter ribs dig sheeting necessary sand out wing slot some alter incidence Once wing centered aligned fu selage tack place few drops Zap Slide A-in brass tubing over ail eron torque rods bend cut shown Note different lengths brass tubes prefer ence Rocket City swivel links included %2-in torque rods Insert torque rod assemblies through fuselage along TE wing shown Re check make sure proper sides tack place CyA Glue wing place 30-minute epoxy generous inside excessive outside build up slight fillet using wet finger smear epoxy along joint Also epoxy brass tubing wing fuselage being care ful get torque rods recommend wrapping bit fiberglass around longer left brass tubing TE added strength torque rod Coat thin cyanoacrylate CyA will have very secure bond Carefully align horizontal stabilizer fuselage glue epoxy stab elevator fin rudder cut /16 hard balsa sheet certain stabilizer centered level wing 900 fuselage center line dry glue %-in triangular braces support stab A-in ply tail plate Attach fin triangular braces fuselage shown making certain TE lines up notch tail plate tail wheel wire will come through should fall rudder hinge line Bore hole through balsa under neath glue yellow Nyrod guide flush tail plate Insert piece straight /16 music wire through Nyrod help line up A-in ply tail wheel plate bottom fuselage fin top Once satisfied CyA tail wheel plate place Position glue rudder eleva tor control rod guides prefer blue Sul livan Products Gold-N-Rod control link ages have drawn plans using have found no problems slop can add brace midway up fuselage desire reinforce guides Once control system set time sheet bottom fuselage A-in crossgrain balsa Check hatches proper fitting Trim necessary Attach tongues hatches fit place care fully drill screw holes through hatch maple blocks using A6 bit Tap blocks 4-40 screw ealarge hatch holes A-in diameter landing gear chose Hallco Temper-Lock rated 45 60 lb gear rated 40 45 lb would probably suf fice sturdier needed slam-and-goes gear drilled out ac cept two 4-20 nylon bolts 4-in ply landing gear plate drilled match 5A2 bit tapped 4-20 Coat threads thin Zap run tap back through Plywood tends splinter will help reinforce threads Should threads eventually strip out just drill holes out 4 use 4-20 blind nuts last steps before covering put place glue throttle pushrod guide fuel-proof firewall fuel tank compartment Any butyrate dope will nicely throttle prefer use Sullivan Products Gold-N-Rod throttle cable rather fool music wire Finish wings gluing A-in W4 balsa tips TE tips cut 1 /2 x %-in TE stock sure re 30 Model Aviation Left It very important keep fuselage straight untwisted during construction easiest method temporarily tape tail gether install firewall formers permanently join tail Right stab must level wing Measure stab tip wing tip side get alignment correct Draw centerline down top fuselage guide mount fin line up triangle absolutely certain fin/rudder hinge line inline hole tail wheel wire comes through Left firewall landing gear mount should solidly braced stage fuel tank hatch lip ply nose bottom already place Also note strips along top edge F2 create hatch seat Right Center align wing carefully measuring tip fu selage side tip tall joint Make sure top wing up far will go Sheet top rear fuselage cross-grain balsa Left Install section yellow Nyrod act bearing tail wheel wire After glue sets Nyrod install tail wheel plate Use piece scrap music wire keep Nyrod aligned glue dries plate Right Install throttle cable guide ail eron torque rod assembly Notch trailing edge stock needed torque rods can move freely through entire range move beveled edge TE tips dont reflex droop Remember wing symmetrical done cut ailerons 1 in TE stock rudder elevator /16 balsa per plans Bevel hinge surfaces shown Go ahead bore torque rod holes ailerons coat inside thin CyA harden balsa careful clog up holes parts should given final sanding before covering preference cover plane before attaching ailerons ele vator rudder technique allows thorough covering job espe cially along hinge lines ends aileron stock Snapdragons far have covered Top Flite Super MonoKote planes design lends itself well glossy finish Super Mono Kote preference covering jobs have kept simple consistent Yellow chosen main color darker colors have variedthough usually metallics covering important remember color scheme should aid telling top model bottom espe cially plane quick small Trying see fin landing gear no fun get disoriented thats dragon wing dark underbelly help out Finish up hinging control surfaces preference Lake Hobbies Easy Hinges bond securely few drops thin Zap hinge slot easily made #11 X-Acto blade hinges require no pinning mount rudder first bend 1A6 tail wheel wire accept l-in-dia tail wheel Carl Goldberg nylon tail wheel bracket mounted slot tail wheel plate aligned Nyrod sleeve Insert tail wheel wire up through mount sleeve bend right angle cut shown side view plan Bore out /l6 hole rudder accept music wire hinge rudder place Mount ailerons elevator shown Mount landing gear two -20 bolts % long will shear off during rough landings wheels decided upon 2/2-in-dia Dave Brown Products Lite Flite Wheels bored out accept 46 axle Carl Goldberg Long Nylon Control Horus Snap-Links round out control linkage attaching control horn rudder recommend attaching over hole tail wheel wire inserts rudderfor added strength business end bird rec ommend Du-Bro 6-oz fuel tank Hayes P/N AL-25 engine mount Du-Bro tank fits perfectly fuel vent lines run straight out through fire wall no bends kinks Ive learued through experience Hayes mount very strong long enough allow move engine forward aft help balancing model flying has done using Zinger 9-5 props have performed well 25 29 engines best prop have found S-29 engine 9-55 Glass Nylon Prop manufactured Yo shioka Model Factory dont recommend trying low pitch 10-in prop 29 en gine model due lack prop clear ance Please remember safe flying rule Like RC aircraft Snapdrag can will bite stick fingers prop Continued page 32 May 1988 31 wing tip trailing edge tip final touches assembling wing Sand glue surface trailing edge tip follows airfoil shape otherwise bevel cut wood will cause tip droop down reflex upward Holes drilled hatches place sanding done plane ready covering Flat surfa ces square corners make covering model breeze control surfaces tail wheel will added last Dont misled solid surfaces plane comes out very light Littlest Miracle Workshop PROFESSIONAL TOOL Send 50 SUITABLE FOR ALLfor catalog HOBBIES AND CRAFTS Makers of. Mini-Glue 74s Stray- Tray Tee Bar Mini-Saw fuff-Stuff & Jewel Stripes SCALE RADIO_CONTROL OK VINTAGE sizes214 31/a 1334 11443/i 1145 P/86s/ LEI2L APPLIED DESIGN CORP PO Box 3384 Torrance CA 90510 WHEELS CONTROL-UNE FREE-FLIGHT NEW BALLOON 21/z4/2 314514 3 As stated before Supertigre S-29 Tigers Paw muffler faster 25 engines requires roughly 1 oz tail weight washer downthrust combination plane will literally pull itself vertically out hands dont try Enya 25XTV combo seems best plane moves out quickly doesnt require added weight 05 Max 25FP solid performer ones Ive seen dont have quite power Enya Install radio choice have used Futaba Conquest 4NL Air tronics SR4R find both excel lent Note elevator rudder ser vos mounted bit offset prevent crowding pushrods on-off switch charging jack mounted fuse lage side opposite engine exhaust receiver battery area Route re ceiver antenna outside fuselage away engine exhaust usually attach fin incorporate rubberband shock cord Always wrap receiver battery pack foam rubber prevent damage vibration impact Also enclose both plastic wrap prevent exposure raw fuel should fuel tank leak first flight set up ailerons 14 throw way rudder should begin 1 elevator % can crank up later like set up throws too hot plane can get away Right now flying about 1% rud der travel ator 3/ ailerons combination plenty hot still controllable help encouragement devel opment testing plane special thanks go Charles Downing Patrick OConnell Jeff Stoltzall fellow mem bers RAMS RC club WinstonSalem King area North Carolina Charlie contributed much advice aerodynamics structure plane Hes also great story two about adventures RC Charlie encouraged write up article about Snapdragon Patrick spent hours discussing improve upon popular Fun Fly designs ideas corporated Snapdragon Patrick plane awaits Jeff has put plane through its paces stamped seal approval clear day can found banks Yadkin River making shoestring-high inverted passes down runway other members RAMS have bitten lips during some ear lier fiascoes gentlemen am grateful please keep quiet SAFE FLYING IS NO ACCIDENT Recoil Tubing Fourmost Fourmost Recoil Tubing four foot length super tough fuel proof urethane Extends tubing preformed four inch coil Four Feet attached fuel can allows placement field box fuel can convenient distance air craft boat After use tubing will retract its original space -saving form out the soil out way Price $450 No 123 Size 1/8 lD information about Recoil Tubing other innovative model products Fourmost send stamped self-addressed business size envelope FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 503 357-2732 $265 repl strips Add 20% postage SMOOTH CONTOUR 3/4234 13/4 1143 11/2414 214514 GOLDEN AGE sizes21/i 314 13 114 43/i 1145 P/8 614 Send *3 fully illustrated catalog other kite accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS
Edition: Model Aviation - 1988/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32
NO OCR TEXT it All moments kept reasonable lengths tight enough hot perform ance wanted mid-wing configuration resulted certain difficulties Considering size Snapdragon one-piece plane inev itable Radio space could also problem spars leading edge trailing edge passing through thrust line As pre viously stated wing chord turned out per fect radio installation Should wing severely damaged one-piece airplane could mean having junk whole thing Therefore strength must wing D-tube construc tion trailing edge sheeting tips squared off simplicity no det rimental effects ply dihedral doubler added just safe side though spars run straight through Trail ing edge tips used prevent possi bility aileron flutter box-style fuselage offered simplicity strength remember looks didnt count project help aero batic ability top bottom contours fuselage symmetrical hatches allow full easy access fuel tank radio equipment Formers kept minimum blunt-nose Stik-type firewall selected No nose wheels please tail dragger wide stance generous tail wheel moment will nicely Joining wing fuselage offers no big problem Just profile Control Line planes hole cut wing inserted aligned epoxy applied fin horizontal stabi lizer cut sheet balsa round out brainstorm first Snapdragon constructed using balsa fuselage keep down weight Problems developed rather quickly tail moment too short proper balance problem control throws set up too high roll rate uncontrollable end result noseheavy erratic aircraft Step step pounding after pound ing kinks worked out tail glued back control throws slowed down center gravity CU reworked last two flights sticks handed friend fellow club member Jeff Stoltz hell fly anything least once time flew although still some what sensitive After two successful easy flights tail popped off again landing Snapdragon found bottom trash can Lessons learned applied three built plywood fuse lages corrected tail moments late August Jeff went field tried again Jeff set plane up Enya 25XTV set up Su pertigre S-29 Tigers Paw muffler Jeff went up first Well hows doing After thoughtful pause Jeff responded Ill tell ya soon nerves calm down After landing settling down bit Jeff took up out practice figured now experienced Snapdragon pilot result again sweet success Takeoffs quick Outrageous climb out angles possible model turned rolled looped better expected Stall turns snaps some thing behold little planes seemed float sky snapped hearts content occasion since Left Somehow using flower logo didnt quite seem right fellow drawn up square corners certainly indicative mod els flight performance Right Control surfaces rather large results quick tight maneuvers desired Its hard see devices kept closed small piece fuel tubing something should standard high-performance model May 1988 25 given weekend several Snapdragons can found chasing darting after other up down Yadkin river bottom authors iocal club field North Carolina Left the hatches off radio fuel tank completely accessible length fuel tubing prevents plywood side rubbing through Insulation antenna Right rough landings crashes 1A-20 nylon bolts allow landing gear break away instead tearing out bottom fuselage Dave Brown Lite Flight Wheels very durable offer significant weight savings tried half snap inverted worked Vertical dives L-shaped pullouts possible Jeff bold enough try Snapdragon has exceeded expec tations size perfect transport yet large enough seen flight design has elements fair symine try results good inverted flight performance controls turned up will tie itself knots Slow down have quick sport ship 15%-thick fully symmetrical airfoil long chord provides plenty lift small plane Blunt tips keep simple big ailerons provide plenty roll response fully aerobatic Supertigre S-29 faster two models though slightly heavier Jeff s both due heavier engine weight added tail bal ancing Enya 25XTV OS Max 25FP Snapdragon balances per fectly having add ballast larger 40-size engine would too much plane Sometime intend try Enya see just what bottom end range Slow flight characteristics surpris ing generous wing control surface area allow putter along like trainer landing approaches plane flares nicely pull nose up higher will mush careful though will snap try park Remember 26 Model Aviation back Jeff Stoitz pick-uD looks like Its loaded up combat match shows just roomSniSlmollcitvIs time scent flvina uwng nuai runwey mw uiru w up unu banking away Takeoff rolls short straight No difficulty ground looping has experienced Steep climb-out gles can made strong 25 engine 1/16 BALSA 518 x 3/4 LEADING SNAPDRAGON W M CARTRETTE 1/8 BALSA K BALSA EDGE 1/4 PLYHAYES P/N AL-25 ENGINE MOUNT 25 TO30 EN G NE HALLCO L G 1/16 BALSA WEBS VERTICAL GRAIN 2-1/2 DIA WHEELS LITE FLIGHT 3/B BALSA TRI STOCK pI/USHEET N LITE PLY I/8LITE PLY SPRUCE SPARS x TOP B BOTTOM 3/8x I-I/2 BALSA TRAILING EDGE STOCK 3/32 BALSA I/4 BALSA Cutting out parts before begin construction reduces clutter workbench makes assembly go much faster easiest way cut ribs stacking shaping blanks Note notches cut leading trailing edge pieces shown picture left author says prefers pre-drill firewall formers may want wait until after model has assembled Left wing standard D-tube construction open center bay allows plenty radio room No cap strips used ribs save assembly time really arent necessary plane Right certain build right left fuselage side best lay out mirror images make sure No cutouts needed fuselage will balance still have plenty tail strength isnt trainer No ballooning tendencies have noted landings Ground handling excellent wide stance main gear tail moment combine give straight takeoff roll landing roll-out No ground looping has oc curred Prop clearance ample nineinch props surprisingly few props have broken plane low profile allows good crosswind taxiing fly ing 2-in wheel selected main gear allow rough terrain foam wheels selected keep weight down Contact ground landing results very little bouncing Like plane slam landing will bouncebut responds quickly enough allow gun engine go around reclaim pride chose use nose gear obvious reasons tend bend rough landings steering gets sloppy wear love eat props Snapdragons main gear mounted 1420 nylon bolts shear away nicely ditch have already saved few headaches Construction Before assemble thing advantageous cut out parts create kit Go ahead drill out firewall former holes Save hatches landing gear mount holes until later Stack sand W3 ribs leave W4 tips bit oversized since will sanded wing contour later balsa used hard grade used Sig Lite Ply throughout adhesive used Zap CA SbZap thinner Zap great sheeting tacking bonding balsa balsa Sb-Zap gives working time works better butt joints areas re quire strength will also need some 30-minute epoxy firewall fuselage/wing joint Flex-Zap can safely substituted some savings weight Wing Lets begin Cut 34 x x 36-in leading edge LE pieces down 22 in. Also cut 48-in-long spars 4 x -in balsa trailing edge TE down 45 Using plan carefully mark rib locations LE TE spars As shown plan use razor saw notch LE TE accept ribs W2 W3 cut notches ribs Wl butt joints Note LE pieces have buttjoined doubled piece / x x 24 -in ply important center ply doubler between marks ribs W 1 Glue LE doubler together now Make sure leading edges straight Use flat surface straight edge necessary Using flat surface lay out plans cover protective film choice prefer wax paper Ill enter debate Align lower spar TE plans Shim up spar scrap strip A6 balsa TE 5A-in blocks Making sure everything lines up plans position glue ribs W2 W3 Use building triangle ensure ribs 900 spar Now glue top spar LE Glue -in ply dihedral braces A6 balsa vertical webbing spars per plan Align glue fore aft pieces ribs W 1 Glue LE TE sheeting shown Carefully align glue place maple servo rails Pay special attention side view plans ensure tops servo rails line up level Use actual servo check proper fit Finish sheeting two center sections Wl W2 completes wing assembly now Fuselage Being sure have right left side mark locations firewall formers F2 F3 maple hatch anchor blocks tail block Cut glue 3/6-sq balsa strips indicated flush edges both fuselage halves Next attach maple hatch anchors %-in tri angular balsa pieces reinforce land ing gear mount Align two fuselage halves secure tail ends together masking tape fuselage sides straight align ment epoxy-glue firewall also glue F2 F3 Glue %-in balsa triangular braces firewall 3A6-sq strips reinforce formers run along top edge F2 Remove masking tape install tail block again checking fuselage alignment Glue A-in ply nose bottom 4-in landing gear mount -in ply strips under radio fuel tank hatch tongues will anchor Sheet top fuselage -in 28 Model Aviation S/H3/4 BALSA LEADING EDGE _zLITEPLYDBLR 3/4LO-3/4 -I ~-~IFAlLHI-#--if DIAEORALVIE BALSA S*ETififIf I/IS BALSA BRACEDTOPS BOTTOMIIIiIi SHEETING TOP -3W-3W-3W-3W-W-16-I11211A-31W-31W 3W-311 AND BOTTOM SHEETVIA BALSA SHONO3/B-IIIIII II CLARITYTOP N BOTTOM WINGPLANTOPVIEW 24x 02 I 1/16 BALSAVEHYICAL GRAINSPRUCE SPARS BALSABINGE TOP OMITTED FORI__LOCATION ------I -~-----_------H---_I MAPLEI _________________SEBSO RAILS1/H BRASS TUBING I---_-3/32 BALSAW-3 SHEET________ F-I V4 PlY 3/BSU MAPLE BLOCKS OHILLED I/LYW3/B BALSA TRI-STOCKANG TAPPED FORIA 4-40 F-I MUSIC WIRE I/A BALSA SHEET3/RI I-I/O BALSA TRAILING EDGE ClOCK SHEETVA BALSAMA0. W 2SHEETIVVUV\AxAA 0 MOUNT 11 3H BALSAiiBURN B STOC Al ENGR BASW E____H EII II IL BFUSELAGE TOP YIEWESITBOHR11 IIlL SBROD ARGE E\\~JAAAVVLIiLILI4\i 3/IS 50/RUDDER BALSA/ SA P FUSELAGE SIDEDIHEDRAL E 1/A PLY LG MOUNT FOR I/A20FINRUDDEF GOLDBERG DUBRO MEG LUE RYRUD N ARD IPPROD AENSRE MOUNTYELLOW RYROD THRUST17J77iI77i1fZE PL 51005I/H IT /HALLODSPECIFICATIONS VI//J//A Q-]WING AREAARK 5G IN LL/JLiiL LSiNJWEIGHT3-3/4 LBS F 3ME FUGHT NOSE BOTTOMTANK HATCHRADIO HATCL TYPICAL HINGE LOCATION \4STABI LIZ ER jjAj rD34DB MODEL AVIATION SNAPDRAGON MID-WING SPORT B FUN FLY PLANE DESIGNED S DRAWN BY W M CARTRETTE TRACING BY JOE DEMARCO ALL RIGHTS RESERVED VABALSA SHEET W-4 3/IA BALSA SHEET \~ II2 cross-grain balsa F3 stabilizer saddle now ready attach wing Give wing preliminary sanding carefully sand off burrs wing slots fuselage Making sure wing right side up carefully patiently slide through fuselage Take care splinter ribs dig sheeting necessary sand out wing slot some alter incidence Once wing centered aligned fu selage tack place few drops Zap Slide A-in brass tubing over ail eron torque rods bend cut shown Note different lengths brass tubes prefer ence Rocket City swivel links included %2-in torque rods Insert torque rod assemblies through fuselage along TE wing shown Re check make sure proper sides tack place CyA Glue wing place 30-minute epoxy generous inside excessive outside build up slight fillet using wet finger smear epoxy along joint Also epoxy brass tubing wing fuselage being care ful get torque rods recommend wrapping bit fiberglass around longer left brass tubing TE added strength torque rod Coat thin cyanoacrylate CyA will have very secure bond Carefully align horizontal stabilizer fuselage glue epoxy stab elevator fin rudder cut /16 hard balsa sheet certain stabilizer centered level wing 900 fuselage center line dry glue %-in triangular braces support stab A-in ply tail plate Attach fin triangular braces fuselage shown making certain TE lines up notch tail plate tail wheel wire will come through should fall rudder hinge line Bore hole through balsa under neath glue yellow Nyrod guide flush tail plate Insert piece straight /16 music wire through Nyrod help line up A-in ply tail wheel plate bottom fuselage fin top Once satisfied CyA tail wheel plate place Position glue rudder eleva tor control rod guides prefer blue Sul livan Products Gold-N-Rod control link ages have drawn plans using have found no problems slop can add brace midway up fuselage desire reinforce guides Once control system set time sheet bottom fuselage A-in crossgrain balsa Check hatches proper fitting Trim necessary Attach tongues hatches fit place care fully drill screw holes through hatch maple blocks using A6 bit Tap blocks 4-40 screw ealarge hatch holes A-in diameter landing gear chose Hallco Temper-Lock rated 45 60 lb gear rated 40 45 lb would probably suf fice sturdier needed slam-and-goes gear drilled out ac cept two 4-20 nylon bolts 4-in ply landing gear plate drilled match 5A2 bit tapped 4-20 Coat threads thin Zap run tap back through Plywood tends splinter will help reinforce threads Should threads eventually strip out just drill holes out 4 use 4-20 blind nuts last steps before covering put place glue throttle pushrod guide fuel-proof firewall fuel tank compartment Any butyrate dope will nicely throttle prefer use Sullivan Products Gold-N-Rod throttle cable rather fool music wire Finish wings gluing A-in W4 balsa tips TE tips cut 1 /2 x %-in TE stock sure re 30 Model Aviation Left It very important keep fuselage straight untwisted during construction easiest method temporarily tape tail gether install firewall formers permanently join tail Right stab must level wing Measure stab tip wing tip side get alignment correct Draw centerline down top fuselage guide mount fin line up triangle absolutely certain fin/rudder hinge line inline hole tail wheel wire comes through Left firewall landing gear mount should solidly braced stage fuel tank hatch lip ply nose bottom already place Also note strips along top edge F2 create hatch seat Right Center align wing carefully measuring tip fu selage side tip tall joint Make sure top wing up far will go Sheet top rear fuselage cross-grain balsa Left Install section yellow Nyrod act bearing tail wheel wire After glue sets Nyrod install tail wheel plate Use piece scrap music wire keep Nyrod aligned glue dries plate Right Install throttle cable guide ail eron torque rod assembly Notch trailing edge stock needed torque rods can move freely through entire range move beveled edge TE tips dont reflex droop Remember wing symmetrical done cut ailerons 1 in TE stock rudder elevator /16 balsa per plans Bevel hinge surfaces shown Go ahead bore torque rod holes ailerons coat inside thin CyA harden balsa careful clog up holes parts should given final sanding before covering preference cover plane before attaching ailerons ele vator rudder technique allows thorough covering job espe cially along hinge lines ends aileron stock Snapdragons far have covered Top Flite Super MonoKote planes design lends itself well glossy finish Super Mono Kote preference covering jobs have kept simple consistent Yellow chosen main color darker colors have variedthough usually metallics covering important remember color scheme should aid telling top model bottom espe cially plane quick small Trying see fin landing gear no fun get disoriented thats dragon wing dark underbelly help out Finish up hinging control surfaces preference Lake Hobbies Easy Hinges bond securely few drops thin Zap hinge slot easily made #11 X-Acto blade hinges require no pinning mount rudder first bend 1A6 tail wheel wire accept l-in-dia tail wheel Carl Goldberg nylon tail wheel bracket mounted slot tail wheel plate aligned Nyrod sleeve Insert tail wheel wire up through mount sleeve bend right angle cut shown side view plan Bore out /l6 hole rudder accept music wire hinge rudder place Mount ailerons elevator shown Mount landing gear two -20 bolts % long will shear off during rough landings wheels decided upon 2/2-in-dia Dave Brown Products Lite Flite Wheels bored out accept 46 axle Carl Goldberg Long Nylon Control Horus Snap-Links round out control linkage attaching control horn rudder recommend attaching over hole tail wheel wire inserts rudderfor added strength business end bird rec ommend Du-Bro 6-oz fuel tank Hayes P/N AL-25 engine mount Du-Bro tank fits perfectly fuel vent lines run straight out through fire wall no bends kinks Ive learued through experience Hayes mount very strong long enough allow move engine forward aft help balancing model flying has done using Zinger 9-5 props have performed well 25 29 engines best prop have found S-29 engine 9-55 Glass Nylon Prop manufactured Yo shioka Model Factory dont recommend trying low pitch 10-in prop 29 en gine model due lack prop clear ance Please remember safe flying rule Like RC aircraft Snapdrag can will bite stick fingers prop Continued page 32 May 1988 31 wing tip trailing edge tip final touches assembling wing Sand glue surface trailing edge tip follows airfoil shape otherwise bevel cut wood will cause tip droop down reflex upward Holes drilled hatches place sanding done plane ready covering Flat surfa ces square corners make covering model breeze control surfaces tail wheel will added last Dont misled solid surfaces plane comes out very light Littlest Miracle Workshop PROFESSIONAL TOOL Send 50 SUITABLE FOR ALLfor catalog HOBBIES AND CRAFTS Makers of. Mini-Glue 74s Stray- Tray Tee Bar Mini-Saw fuff-Stuff & Jewel Stripes SCALE RADIO_CONTROL OK VINTAGE sizes214 31/a 1334 11443/i 1145 P/86s/ LEI2L APPLIED DESIGN CORP PO Box 3384 Torrance CA 90510 WHEELS CONTROL-UNE FREE-FLIGHT NEW BALLOON 21/z4/2 314514 3 As stated before Supertigre S-29 Tigers Paw muffler faster 25 engines requires roughly 1 oz tail weight washer downthrust combination plane will literally pull itself vertically out hands dont try Enya 25XTV combo seems best plane moves out quickly doesnt require added weight 05 Max 25FP solid performer ones Ive seen dont have quite power Enya Install radio choice have used Futaba Conquest 4NL Air tronics SR4R find both excel lent Note elevator rudder ser vos mounted bit offset prevent crowding pushrods on-off switch charging jack mounted fuse lage side opposite engine exhaust receiver battery area Route re ceiver antenna outside fuselage away engine exhaust usually attach fin incorporate rubberband shock cord Always wrap receiver battery pack foam rubber prevent damage vibration impact Also enclose both plastic wrap prevent exposure raw fuel should fuel tank leak first flight set up ailerons 14 throw way rudder should begin 1 elevator % can crank up later like set up throws too hot plane can get away Right now flying about 1% rud der travel ator 3/ ailerons combination plenty hot still controllable help encouragement devel opment testing plane special thanks go Charles Downing Patrick OConnell Jeff Stoltzall fellow mem bers RAMS RC club WinstonSalem King area North Carolina Charlie contributed much advice aerodynamics structure plane Hes also great story two about adventures RC Charlie encouraged write up article about Snapdragon Patrick spent hours discussing improve upon popular Fun Fly designs ideas corporated Snapdragon Patrick plane awaits Jeff has put plane through its paces stamped seal approval clear day can found banks Yadkin River making shoestring-high inverted passes down runway other members RAMS have bitten lips during some ear lier fiascoes gentlemen am grateful please keep quiet SAFE FLYING IS NO ACCIDENT Recoil Tubing Fourmost Fourmost Recoil Tubing four foot length super tough fuel proof urethane Extends tubing preformed four inch coil Four Feet attached fuel can allows placement field box fuel can convenient distance air craft boat After use tubing will retract its original space -saving form out the soil out way Price $450 No 123 Size 1/8 lD information about Recoil Tubing other innovative model products Fourmost send stamped self-addressed business size envelope FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 503 357-2732 $265 repl strips Add 20% postage SMOOTH CONTOUR 3/4234 13/4 1143 11/2414 214514 GOLDEN AGE sizes21/i 314 13 114 43/i 1145 P/8 614 Send *3 fully illustrated catalog other kite accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS
Edition: Model Aviation - 1988/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32
NO OCR TEXT it All moments kept reasonable lengths tight enough hot perform ance wanted mid-wing configuration resulted certain difficulties Considering size Snapdragon one-piece plane inev itable Radio space could also problem spars leading edge trailing edge passing through thrust line As pre viously stated wing chord turned out per fect radio installation Should wing severely damaged one-piece airplane could mean having junk whole thing Therefore strength must wing D-tube construc tion trailing edge sheeting tips squared off simplicity no det rimental effects ply dihedral doubler added just safe side though spars run straight through Trail ing edge tips used prevent possi bility aileron flutter box-style fuselage offered simplicity strength remember looks didnt count project help aero batic ability top bottom contours fuselage symmetrical hatches allow full easy access fuel tank radio equipment Formers kept minimum blunt-nose Stik-type firewall selected No nose wheels please tail dragger wide stance generous tail wheel moment will nicely Joining wing fuselage offers no big problem Just profile Control Line planes hole cut wing inserted aligned epoxy applied fin horizontal stabi lizer cut sheet balsa round out brainstorm first Snapdragon constructed using balsa fuselage keep down weight Problems developed rather quickly tail moment too short proper balance problem control throws set up too high roll rate uncontrollable end result noseheavy erratic aircraft Step step pounding after pound ing kinks worked out tail glued back control throws slowed down center gravity CU reworked last two flights sticks handed friend fellow club member Jeff Stoltz hell fly anything least once time flew although still some what sensitive After two successful easy flights tail popped off again landing Snapdragon found bottom trash can Lessons learned applied three built plywood fuse lages corrected tail moments late August Jeff went field tried again Jeff set plane up Enya 25XTV set up Su pertigre S-29 Tigers Paw muffler Jeff went up first Well hows doing After thoughtful pause Jeff responded Ill tell ya soon nerves calm down After landing settling down bit Jeff took up out practice figured now experienced Snapdragon pilot result again sweet success Takeoffs quick Outrageous climb out angles possible model turned rolled looped better expected Stall turns snaps some thing behold little planes seemed float sky snapped hearts content occasion since Left Somehow using flower logo didnt quite seem right fellow drawn up square corners certainly indicative mod els flight performance Right Control surfaces rather large results quick tight maneuvers desired Its hard see devices kept closed small piece fuel tubing something should standard high-performance model May 1988 25 given weekend several Snapdragons can found chasing darting after other up down Yadkin river bottom authors iocal club field North Carolina Left the hatches off radio fuel tank completely accessible length fuel tubing prevents plywood side rubbing through Insulation antenna Right rough landings crashes 1A-20 nylon bolts allow landing gear break away instead tearing out bottom fuselage Dave Brown Lite Flight Wheels very durable offer significant weight savings tried half snap inverted worked Vertical dives L-shaped pullouts possible Jeff bold enough try Snapdragon has exceeded expec tations size perfect transport yet large enough seen flight design has elements fair symine try results good inverted flight performance controls turned up will tie itself knots Slow down have quick sport ship 15%-thick fully symmetrical airfoil long chord provides plenty lift small plane Blunt tips keep simple big ailerons provide plenty roll response fully aerobatic Supertigre S-29 faster two models though slightly heavier Jeff s both due heavier engine weight added tail bal ancing Enya 25XTV OS Max 25FP Snapdragon balances per fectly having add ballast larger 40-size engine would too much plane Sometime intend try Enya see just what bottom end range Slow flight characteristics surpris ing generous wing control surface area allow putter along like trainer landing approaches plane flares nicely pull nose up higher will mush careful though will snap try park Remember 26 Model Aviation back Jeff Stoitz pick-uD looks like Its loaded up combat match shows just roomSniSlmollcitvIs time scent flvina uwng nuai runwey mw uiru w up unu banking away Takeoff rolls short straight No difficulty ground looping has experienced Steep climb-out gles can made strong 25 engine 1/16 BALSA 518 x 3/4 LEADING SNAPDRAGON W M CARTRETTE 1/8 BALSA K BALSA EDGE 1/4 PLYHAYES P/N AL-25 ENGINE MOUNT 25 TO30 EN G NE HALLCO L G 1/16 BALSA WEBS VERTICAL GRAIN 2-1/2 DIA WHEELS LITE FLIGHT 3/B BALSA TRI STOCK pI/USHEET N LITE PLY I/8LITE PLY SPRUCE SPARS x TOP B BOTTOM 3/8x I-I/2 BALSA TRAILING EDGE STOCK 3/32 BALSA I/4 BALSA Cutting out parts before begin construction reduces clutter workbench makes assembly go much faster easiest way cut ribs stacking shaping blanks Note notches cut leading trailing edge pieces shown picture left author says prefers pre-drill firewall formers may want wait until after model has assembled Left wing standard D-tube construction open center bay allows plenty radio room No cap strips used ribs save assembly time really arent necessary plane Right certain build right left fuselage side best lay out mirror images make sure No cutouts needed fuselage will balance still have plenty tail strength isnt trainer No ballooning tendencies have noted landings Ground handling excellent wide stance main gear tail moment combine give straight takeoff roll landing roll-out No ground looping has oc curred Prop clearance ample nineinch props surprisingly few props have broken plane low profile allows good crosswind taxiing fly ing 2-in wheel selected main gear allow rough terrain foam wheels selected keep weight down Contact ground landing results very little bouncing Like plane slam landing will bouncebut responds quickly enough allow gun engine go around reclaim pride chose use nose gear obvious reasons tend bend rough landings steering gets sloppy wear love eat props Snapdragons main gear mounted 1420 nylon bolts shear away nicely ditch have already saved few headaches Construction Before assemble thing advantageous cut out parts create kit Go ahead drill out firewall former holes Save hatches landing gear mount holes until later Stack sand W3 ribs leave W4 tips bit oversized since will sanded wing contour later balsa used hard grade used Sig Lite Ply throughout adhesive used Zap CA SbZap thinner Zap great sheeting tacking bonding balsa balsa Sb-Zap gives working time works better butt joints areas re quire strength will also need some 30-minute epoxy firewall fuselage/wing joint Flex-Zap can safely substituted some savings weight Wing Lets begin Cut 34 x x 36-in leading edge LE pieces down 22 in. Also cut 48-in-long spars 4 x -in balsa trailing edge TE down 45 Using plan carefully mark rib locations LE TE spars As shown plan use razor saw notch LE TE accept ribs W2 W3 cut notches ribs Wl butt joints Note LE pieces have buttjoined doubled piece / x x 24 -in ply important center ply doubler between marks ribs W 1 Glue LE doubler together now Make sure leading edges straight Use flat surface straight edge necessary Using flat surface lay out plans cover protective film choice prefer wax paper Ill enter debate Align lower spar TE plans Shim up spar scrap strip A6 balsa TE 5A-in blocks Making sure everything lines up plans position glue ribs W2 W3 Use building triangle ensure ribs 900 spar Now glue top spar LE Glue -in ply dihedral braces A6 balsa vertical webbing spars per plan Align glue fore aft pieces ribs W 1 Glue LE TE sheeting shown Carefully align glue place maple servo rails Pay special attention side view plans ensure tops servo rails line up level Use actual servo check proper fit Finish sheeting two center sections Wl W2 completes wing assembly now Fuselage Being sure have right left side mark locations firewall formers F2 F3 maple hatch anchor blocks tail block Cut glue 3/6-sq balsa strips indicated flush edges both fuselage halves Next attach maple hatch anchors %-in tri angular balsa pieces reinforce land ing gear mount Align two fuselage halves secure tail ends together masking tape fuselage sides straight align ment epoxy-glue firewall also glue F2 F3 Glue %-in balsa triangular braces firewall 3A6-sq strips reinforce formers run along top edge F2 Remove masking tape install tail block again checking fuselage alignment Glue A-in ply nose bottom 4-in landing gear mount -in ply strips under radio fuel tank hatch tongues will anchor Sheet top fuselage -in 28 Model Aviation S/H3/4 BALSA LEADING EDGE _zLITEPLYDBLR 3/4LO-3/4 -I ~-~IFAlLHI-#--if DIAEORALVIE BALSA S*ETififIf I/IS BALSA BRACEDTOPS BOTTOMIIIiIi SHEETING TOP -3W-3W-3W-3W-W-16-I11211A-31W-31W 3W-311 AND BOTTOM SHEETVIA BALSA SHONO3/B-IIIIII II CLARITYTOP N BOTTOM WINGPLANTOPVIEW 24x 02 I 1/16 BALSAVEHYICAL GRAINSPRUCE SPARS BALSABINGE TOP OMITTED FORI__LOCATION ------I -~-----_------H---_I MAPLEI _________________SEBSO RAILS1/H BRASS TUBING I---_-3/32 BALSAW-3 SHEET________ F-I V4 PlY 3/BSU MAPLE BLOCKS OHILLED I/LYW3/B BALSA TRI-STOCKANG TAPPED FORIA 4-40 F-I MUSIC WIRE I/A BALSA SHEET3/RI I-I/O BALSA TRAILING EDGE ClOCK SHEETVA BALSAMA0. W 2SHEETIVVUV\AxAA 0 MOUNT 11 3H BALSAiiBURN B STOC Al ENGR BASW E____H EII II IL BFUSELAGE TOP YIEWESITBOHR11 IIlL SBROD ARGE E\\~JAAAVVLIiLILI4\i 3/IS 50/RUDDER BALSA/ SA P FUSELAGE SIDEDIHEDRAL E 1/A PLY LG MOUNT FOR I/A20FINRUDDEF GOLDBERG DUBRO MEG LUE RYRUD N ARD IPPROD AENSRE MOUNTYELLOW RYROD THRUST17J77iI77i1fZE PL 51005I/H IT /HALLODSPECIFICATIONS VI//J//A Q-]WING AREAARK 5G IN LL/JLiiL LSiNJWEIGHT3-3/4 LBS F 3ME FUGHT NOSE BOTTOMTANK HATCHRADIO HATCL TYPICAL HINGE LOCATION \4STABI LIZ ER jjAj rD34DB MODEL AVIATION SNAPDRAGON MID-WING SPORT B FUN FLY PLANE DESIGNED S DRAWN BY W M CARTRETTE TRACING BY JOE DEMARCO ALL RIGHTS RESERVED VABALSA SHEET W-4 3/IA BALSA SHEET \~ II2 cross-grain balsa F3 stabilizer saddle now ready attach wing Give wing preliminary sanding carefully sand off burrs wing slots fuselage Making sure wing right side up carefully patiently slide through fuselage Take care splinter ribs dig sheeting necessary sand out wing slot some alter incidence Once wing centered aligned fu selage tack place few drops Zap Slide A-in brass tubing over ail eron torque rods bend cut shown Note different lengths brass tubes prefer ence Rocket City swivel links included %2-in torque rods Insert torque rod assemblies through fuselage along TE wing shown Re check make sure proper sides tack place CyA Glue wing place 30-minute epoxy generous inside excessive outside build up slight fillet using wet finger smear epoxy along joint Also epoxy brass tubing wing fuselage being care ful get torque rods recommend wrapping bit fiberglass around longer left brass tubing TE added strength torque rod Coat thin cyanoacrylate CyA will have very secure bond Carefully align horizontal stabilizer fuselage glue epoxy stab elevator fin rudder cut /16 hard balsa sheet certain stabilizer centered level wing 900 fuselage center line dry glue %-in triangular braces support stab A-in ply tail plate Attach fin triangular braces fuselage shown making certain TE lines up notch tail plate tail wheel wire will come through should fall rudder hinge line Bore hole through balsa under neath glue yellow Nyrod guide flush tail plate Insert piece straight /16 music wire through Nyrod help line up A-in ply tail wheel plate bottom fuselage fin top Once satisfied CyA tail wheel plate place Position glue rudder eleva tor control rod guides prefer blue Sul livan Products Gold-N-Rod control link ages have drawn plans using have found no problems slop can add brace midway up fuselage desire reinforce guides Once control system set time sheet bottom fuselage A-in crossgrain balsa Check hatches proper fitting Trim necessary Attach tongues hatches fit place care fully drill screw holes through hatch maple blocks using A6 bit Tap blocks 4-40 screw ealarge hatch holes A-in diameter landing gear chose Hallco Temper-Lock rated 45 60 lb gear rated 40 45 lb would probably suf fice sturdier needed slam-and-goes gear drilled out ac cept two 4-20 nylon bolts 4-in ply landing gear plate drilled match 5A2 bit tapped 4-20 Coat threads thin Zap run tap back through Plywood tends splinter will help reinforce threads Should threads eventually strip out just drill holes out 4 use 4-20 blind nuts last steps before covering put place glue throttle pushrod guide fuel-proof firewall fuel tank compartment Any butyrate dope will nicely throttle prefer use Sullivan Products Gold-N-Rod throttle cable rather fool music wire Finish wings gluing A-in W4 balsa tips TE tips cut 1 /2 x %-in TE stock sure re 30 Model Aviation Left It very important keep fuselage straight untwisted during construction easiest method temporarily tape tail gether install firewall formers permanently join tail Right stab must level wing Measure stab tip wing tip side get alignment correct Draw centerline down top fuselage guide mount fin line up triangle absolutely certain fin/rudder hinge line inline hole tail wheel wire comes through Left firewall landing gear mount should solidly braced stage fuel tank hatch lip ply nose bottom already place Also note strips along top edge F2 create hatch seat Right Center align wing carefully measuring tip fu selage side tip tall joint Make sure top wing up far will go Sheet top rear fuselage cross-grain balsa Left Install section yellow Nyrod act bearing tail wheel wire After glue sets Nyrod install tail wheel plate Use piece scrap music wire keep Nyrod aligned glue dries plate Right Install throttle cable guide ail eron torque rod assembly Notch trailing edge stock needed torque rods can move freely through entire range move beveled edge TE tips dont reflex droop Remember wing symmetrical done cut ailerons 1 in TE stock rudder elevator /16 balsa per plans Bevel hinge surfaces shown Go ahead bore torque rod holes ailerons coat inside thin CyA harden balsa careful clog up holes parts should given final sanding before covering preference cover plane before attaching ailerons ele vator rudder technique allows thorough covering job espe cially along hinge lines ends aileron stock Snapdragons far have covered Top Flite Super MonoKote planes design lends itself well glossy finish Super Mono Kote preference covering jobs have kept simple consistent Yellow chosen main color darker colors have variedthough usually metallics covering important remember color scheme should aid telling top model bottom espe cially plane quick small Trying see fin landing gear no fun get disoriented thats dragon wing dark underbelly help out Finish up hinging control surfaces preference Lake Hobbies Easy Hinges bond securely few drops thin Zap hinge slot easily made #11 X-Acto blade hinges require no pinning mount rudder first bend 1A6 tail wheel wire accept l-in-dia tail wheel Carl Goldberg nylon tail wheel bracket mounted slot tail wheel plate aligned Nyrod sleeve Insert tail wheel wire up through mount sleeve bend right angle cut shown side view plan Bore out /l6 hole rudder accept music wire hinge rudder place Mount ailerons elevator shown Mount landing gear two -20 bolts % long will shear off during rough landings wheels decided upon 2/2-in-dia Dave Brown Products Lite Flite Wheels bored out accept 46 axle Carl Goldberg Long Nylon Control Horus Snap-Links round out control linkage attaching control horn rudder recommend attaching over hole tail wheel wire inserts rudderfor added strength business end bird rec ommend Du-Bro 6-oz fuel tank Hayes P/N AL-25 engine mount Du-Bro tank fits perfectly fuel vent lines run straight out through fire wall no bends kinks Ive learued through experience Hayes mount very strong long enough allow move engine forward aft help balancing model flying has done using Zinger 9-5 props have performed well 25 29 engines best prop have found S-29 engine 9-55 Glass Nylon Prop manufactured Yo shioka Model Factory dont recommend trying low pitch 10-in prop 29 en gine model due lack prop clear ance Please remember safe flying rule Like RC aircraft Snapdrag can will bite stick fingers prop Continued page 32 May 1988 31 wing tip trailing edge tip final touches assembling wing Sand glue surface trailing edge tip follows airfoil shape otherwise bevel cut wood will cause tip droop down reflex upward Holes drilled hatches place sanding done plane ready covering Flat surfa ces square corners make covering model breeze control surfaces tail wheel will added last Dont misled solid surfaces plane comes out very light Littlest Miracle Workshop PROFESSIONAL TOOL Send 50 SUITABLE FOR ALLfor catalog HOBBIES AND CRAFTS Makers of. Mini-Glue 74s Stray- Tray Tee Bar Mini-Saw fuff-Stuff & Jewel Stripes SCALE RADIO_CONTROL OK VINTAGE sizes214 31/a 1334 11443/i 1145 P/86s/ LEI2L APPLIED DESIGN CORP PO Box 3384 Torrance CA 90510 WHEELS CONTROL-UNE FREE-FLIGHT NEW BALLOON 21/z4/2 314514 3 As stated before Supertigre S-29 Tigers Paw muffler faster 25 engines requires roughly 1 oz tail weight washer downthrust combination plane will literally pull itself vertically out hands dont try Enya 25XTV combo seems best plane moves out quickly doesnt require added weight 05 Max 25FP solid performer ones Ive seen dont have quite power Enya Install radio choice have used Futaba Conquest 4NL Air tronics SR4R find both excel lent Note elevator rudder ser vos mounted bit offset prevent crowding pushrods on-off switch charging jack mounted fuse lage side opposite engine exhaust receiver battery area Route re ceiver antenna outside fuselage away engine exhaust usually attach fin incorporate rubberband shock cord Always wrap receiver battery pack foam rubber prevent damage vibration impact Also enclose both plastic wrap prevent exposure raw fuel should fuel tank leak first flight set up ailerons 14 throw way rudder should begin 1 elevator % can crank up later like set up throws too hot plane can get away Right now flying about 1% rud der travel ator 3/ ailerons combination plenty hot still controllable help encouragement devel opment testing plane special thanks go Charles Downing Patrick OConnell Jeff Stoltzall fellow mem bers RAMS RC club WinstonSalem King area North Carolina Charlie contributed much advice aerodynamics structure plane Hes also great story two about adventures RC Charlie encouraged write up article about Snapdragon Patrick spent hours discussing improve upon popular Fun Fly designs ideas corporated Snapdragon Patrick plane awaits Jeff has put plane through its paces stamped seal approval clear day can found banks Yadkin River making shoestring-high inverted passes down runway other members RAMS have bitten lips during some ear lier fiascoes gentlemen am grateful please keep quiet SAFE FLYING IS NO ACCIDENT Recoil Tubing Fourmost Fourmost Recoil Tubing four foot length super tough fuel proof urethane Extends tubing preformed four inch coil Four Feet attached fuel can allows placement field box fuel can convenient distance air craft boat After use tubing will retract its original space -saving form out the soil out way Price $450 No 123 Size 1/8 lD information about Recoil Tubing other innovative model products Fourmost send stamped self-addressed business size envelope FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 503 357-2732 $265 repl strips Add 20% postage SMOOTH CONTOUR 3/4234 13/4 1143 11/2414 214514 GOLDEN AGE sizes21/i 314 13 114 43/i 1145 P/8 614 Send *3 fully illustrated catalog other kite accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS
Edition: Model Aviation - 1988/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32
NO OCR TEXT it All moments kept reasonable lengths tight enough hot perform ance wanted mid-wing configuration resulted certain difficulties Considering size Snapdragon one-piece plane inev itable Radio space could also problem spars leading edge trailing edge passing through thrust line As pre viously stated wing chord turned out per fect radio installation Should wing severely damaged one-piece airplane could mean having junk whole thing Therefore strength must wing D-tube construc tion trailing edge sheeting tips squared off simplicity no det rimental effects ply dihedral doubler added just safe side though spars run straight through Trail ing edge tips used prevent possi bility aileron flutter box-style fuselage offered simplicity strength remember looks didnt count project help aero batic ability top bottom contours fuselage symmetrical hatches allow full easy access fuel tank radio equipment Formers kept minimum blunt-nose Stik-type firewall selected No nose wheels please tail dragger wide stance generous tail wheel moment will nicely Joining wing fuselage offers no big problem Just profile Control Line planes hole cut wing inserted aligned epoxy applied fin horizontal stabi lizer cut sheet balsa round out brainstorm first Snapdragon constructed using balsa fuselage keep down weight Problems developed rather quickly tail moment too short proper balance problem control throws set up too high roll rate uncontrollable end result noseheavy erratic aircraft Step step pounding after pound ing kinks worked out tail glued back control throws slowed down center gravity CU reworked last two flights sticks handed friend fellow club member Jeff Stoltz hell fly anything least once time flew although still some what sensitive After two successful easy flights tail popped off again landing Snapdragon found bottom trash can Lessons learned applied three built plywood fuse lages corrected tail moments late August Jeff went field tried again Jeff set plane up Enya 25XTV set up Su pertigre S-29 Tigers Paw muffler Jeff went up first Well hows doing After thoughtful pause Jeff responded Ill tell ya soon nerves calm down After landing settling down bit Jeff took up out practice figured now experienced Snapdragon pilot result again sweet success Takeoffs quick Outrageous climb out angles possible model turned rolled looped better expected Stall turns snaps some thing behold little planes seemed float sky snapped hearts content occasion since Left Somehow using flower logo didnt quite seem right fellow drawn up square corners certainly indicative mod els flight performance Right Control surfaces rather large results quick tight maneuvers desired Its hard see devices kept closed small piece fuel tubing something should standard high-performance model May 1988 25 given weekend several Snapdragons can found chasing darting after other up down Yadkin river bottom authors iocal club field North Carolina Left the hatches off radio fuel tank completely accessible length fuel tubing prevents plywood side rubbing through Insulation antenna Right rough landings crashes 1A-20 nylon bolts allow landing gear break away instead tearing out bottom fuselage Dave Brown Lite Flight Wheels very durable offer significant weight savings tried half snap inverted worked Vertical dives L-shaped pullouts possible Jeff bold enough try Snapdragon has exceeded expec tations size perfect transport yet large enough seen flight design has elements fair symine try results good inverted flight performance controls turned up will tie itself knots Slow down have quick sport ship 15%-thick fully symmetrical airfoil long chord provides plenty lift small plane Blunt tips keep simple big ailerons provide plenty roll response fully aerobatic Supertigre S-29 faster two models though slightly heavier Jeff s both due heavier engine weight added tail bal ancing Enya 25XTV OS Max 25FP Snapdragon balances per fectly having add ballast larger 40-size engine would too much plane Sometime intend try Enya see just what bottom end range Slow flight characteristics surpris ing generous wing control surface area allow putter along like trainer landing approaches plane flares nicely pull nose up higher will mush careful though will snap try park Remember 26 Model Aviation back Jeff Stoitz pick-uD looks like Its loaded up combat match shows just roomSniSlmollcitvIs time scent flvina uwng nuai runwey mw uiru w up unu banking away Takeoff rolls short straight No difficulty ground looping has experienced Steep climb-out gles can made strong 25 engine 1/16 BALSA 518 x 3/4 LEADING SNAPDRAGON W M CARTRETTE 1/8 BALSA K BALSA EDGE 1/4 PLYHAYES P/N AL-25 ENGINE MOUNT 25 TO30 EN G NE HALLCO L G 1/16 BALSA WEBS VERTICAL GRAIN 2-1/2 DIA WHEELS LITE FLIGHT 3/B BALSA TRI STOCK pI/USHEET N LITE PLY I/8LITE PLY SPRUCE SPARS x TOP B BOTTOM 3/8x I-I/2 BALSA TRAILING EDGE STOCK 3/32 BALSA I/4 BALSA Cutting out parts before begin construction reduces clutter workbench makes assembly go much faster easiest way cut ribs stacking shaping blanks Note notches cut leading trailing edge pieces shown picture left author says prefers pre-drill firewall formers may want wait until after model has assembled Left wing standard D-tube construction open center bay allows plenty radio room No cap strips used ribs save assembly time really arent necessary plane Right certain build right left fuselage side best lay out mirror images make sure No cutouts needed fuselage will balance still have plenty tail strength isnt trainer No ballooning tendencies have noted landings Ground handling excellent wide stance main gear tail moment combine give straight takeoff roll landing roll-out No ground looping has oc curred Prop clearance ample nineinch props surprisingly few props have broken plane low profile allows good crosswind taxiing fly ing 2-in wheel selected main gear allow rough terrain foam wheels selected keep weight down Contact ground landing results very little bouncing Like plane slam landing will bouncebut responds quickly enough allow gun engine go around reclaim pride chose use nose gear obvious reasons tend bend rough landings steering gets sloppy wear love eat props Snapdragons main gear mounted 1420 nylon bolts shear away nicely ditch have already saved few headaches Construction Before assemble thing advantageous cut out parts create kit Go ahead drill out firewall former holes Save hatches landing gear mount holes until later Stack sand W3 ribs leave W4 tips bit oversized since will sanded wing contour later balsa used hard grade used Sig Lite Ply throughout adhesive used Zap CA SbZap thinner Zap great sheeting tacking bonding balsa balsa Sb-Zap gives working time works better butt joints areas re quire strength will also need some 30-minute epoxy firewall fuselage/wing joint Flex-Zap can safely substituted some savings weight Wing Lets begin Cut 34 x x 36-in leading edge LE pieces down 22 in. Also cut 48-in-long spars 4 x -in balsa trailing edge TE down 45 Using plan carefully mark rib locations LE TE spars As shown plan use razor saw notch LE TE accept ribs W2 W3 cut notches ribs Wl butt joints Note LE pieces have buttjoined doubled piece / x x 24 -in ply important center ply doubler between marks ribs W 1 Glue LE doubler together now Make sure leading edges straight Use flat surface straight edge necessary Using flat surface lay out plans cover protective film choice prefer wax paper Ill enter debate Align lower spar TE plans Shim up spar scrap strip A6 balsa TE 5A-in blocks Making sure everything lines up plans position glue ribs W2 W3 Use building triangle ensure ribs 900 spar Now glue top spar LE Glue -in ply dihedral braces A6 balsa vertical webbing spars per plan Align glue fore aft pieces ribs W 1 Glue LE TE sheeting shown Carefully align glue place maple servo rails Pay special attention side view plans ensure tops servo rails line up level Use actual servo check proper fit Finish sheeting two center sections Wl W2 completes wing assembly now Fuselage Being sure have right left side mark locations firewall formers F2 F3 maple hatch anchor blocks tail block Cut glue 3/6-sq balsa strips indicated flush edges both fuselage halves Next attach maple hatch anchors %-in tri angular balsa pieces reinforce land ing gear mount Align two fuselage halves secure tail ends together masking tape fuselage sides straight align ment epoxy-glue firewall also glue F2 F3 Glue %-in balsa triangular braces firewall 3A6-sq strips reinforce formers run along top edge F2 Remove masking tape install tail block again checking fuselage alignment Glue A-in ply nose bottom 4-in landing gear mount -in ply strips under radio fuel tank hatch tongues will anchor Sheet top fuselage -in 28 Model Aviation S/H3/4 BALSA LEADING EDGE _zLITEPLYDBLR 3/4LO-3/4 -I ~-~IFAlLHI-#--if DIAEORALVIE BALSA S*ETififIf I/IS BALSA BRACEDTOPS BOTTOMIIIiIi SHEETING TOP -3W-3W-3W-3W-W-16-I11211A-31W-31W 3W-311 AND BOTTOM SHEETVIA BALSA SHONO3/B-IIIIII II CLARITYTOP N BOTTOM WINGPLANTOPVIEW 24x 02 I 1/16 BALSAVEHYICAL GRAINSPRUCE SPARS BALSABINGE TOP OMITTED FORI__LOCATION ------I -~-----_------H---_I MAPLEI _________________SEBSO RAILS1/H BRASS TUBING I---_-3/32 BALSAW-3 SHEET________ F-I V4 PlY 3/BSU MAPLE BLOCKS OHILLED I/LYW3/B BALSA TRI-STOCKANG TAPPED FORIA 4-40 F-I MUSIC WIRE I/A BALSA SHEET3/RI I-I/O BALSA TRAILING EDGE ClOCK SHEETVA BALSAMA0. W 2SHEETIVVUV\AxAA 0 MOUNT 11 3H BALSAiiBURN B STOC Al ENGR BASW E____H EII II IL BFUSELAGE TOP YIEWESITBOHR11 IIlL SBROD ARGE E\\~JAAAVVLIiLILI4\i 3/IS 50/RUDDER BALSA/ SA P FUSELAGE SIDEDIHEDRAL E 1/A PLY LG MOUNT FOR I/A20FINRUDDEF GOLDBERG DUBRO MEG LUE RYRUD N ARD IPPROD AENSRE MOUNTYELLOW RYROD THRUST17J77iI77i1fZE PL 51005I/H IT /HALLODSPECIFICATIONS VI//J//A Q-]WING AREAARK 5G IN LL/JLiiL LSiNJWEIGHT3-3/4 LBS F 3ME FUGHT NOSE BOTTOMTANK HATCHRADIO HATCL TYPICAL HINGE LOCATION \4STABI LIZ ER jjAj rD34DB MODEL AVIATION SNAPDRAGON MID-WING SPORT B FUN FLY PLANE DESIGNED S DRAWN BY W M CARTRETTE TRACING BY JOE DEMARCO ALL RIGHTS RESERVED VABALSA SHEET W-4 3/IA BALSA SHEET \~ II2 cross-grain balsa F3 stabilizer saddle now ready attach wing Give wing preliminary sanding carefully sand off burrs wing slots fuselage Making sure wing right side up carefully patiently slide through fuselage Take care splinter ribs dig sheeting necessary sand out wing slot some alter incidence Once wing centered aligned fu selage tack place few drops Zap Slide A-in brass tubing over ail eron torque rods bend cut shown Note different lengths brass tubes prefer ence Rocket City swivel links included %2-in torque rods Insert torque rod assemblies through fuselage along TE wing shown Re check make sure proper sides tack place CyA Glue wing place 30-minute epoxy generous inside excessive outside build up slight fillet using wet finger smear epoxy along joint Also epoxy brass tubing wing fuselage being care ful get torque rods recommend wrapping bit fiberglass around longer left brass tubing TE added strength torque rod Coat thin cyanoacrylate CyA will have very secure bond Carefully align horizontal stabilizer fuselage glue epoxy stab elevator fin rudder cut /16 hard balsa sheet certain stabilizer centered level wing 900 fuselage center line dry glue %-in triangular braces support stab A-in ply tail plate Attach fin triangular braces fuselage shown making certain TE lines up notch tail plate tail wheel wire will come through should fall rudder hinge line Bore hole through balsa under neath glue yellow Nyrod guide flush tail plate Insert piece straight /16 music wire through Nyrod help line up A-in ply tail wheel plate bottom fuselage fin top Once satisfied CyA tail wheel plate place Position glue rudder eleva tor control rod guides prefer blue Sul livan Products Gold-N-Rod control link ages have drawn plans using have found no problems slop can add brace midway up fuselage desire reinforce guides Once control system set time sheet bottom fuselage A-in crossgrain balsa Check hatches proper fitting Trim necessary Attach tongues hatches fit place care fully drill screw holes through hatch maple blocks using A6 bit Tap blocks 4-40 screw ealarge hatch holes A-in diameter landing gear chose Hallco Temper-Lock rated 45 60 lb gear rated 40 45 lb would probably suf fice sturdier needed slam-and-goes gear drilled out ac cept two 4-20 nylon bolts 4-in ply landing gear plate drilled match 5A2 bit tapped 4-20 Coat threads thin Zap run tap back through Plywood tends splinter will help reinforce threads Should threads eventually strip out just drill holes out 4 use 4-20 blind nuts last steps before covering put place glue throttle pushrod guide fuel-proof firewall fuel tank compartment Any butyrate dope will nicely throttle prefer use Sullivan Products Gold-N-Rod throttle cable rather fool music wire Finish wings gluing A-in W4 balsa tips TE tips cut 1 /2 x %-in TE stock sure re 30 Model Aviation Left It very important keep fuselage straight untwisted during construction easiest method temporarily tape tail gether install firewall formers permanently join tail Right stab must level wing Measure stab tip wing tip side get alignment correct Draw centerline down top fuselage guide mount fin line up triangle absolutely certain fin/rudder hinge line inline hole tail wheel wire comes through Left firewall landing gear mount should solidly braced stage fuel tank hatch lip ply nose bottom already place Also note strips along top edge F2 create hatch seat Right Center align wing carefully measuring tip fu selage side tip tall joint Make sure top wing up far will go Sheet top rear fuselage cross-grain balsa Left Install section yellow Nyrod act bearing tail wheel wire After glue sets Nyrod install tail wheel plate Use piece scrap music wire keep Nyrod aligned glue dries plate Right Install throttle cable guide ail eron torque rod assembly Notch trailing edge stock needed torque rods can move freely through entire range move beveled edge TE tips dont reflex droop Remember wing symmetrical done cut ailerons 1 in TE stock rudder elevator /16 balsa per plans Bevel hinge surfaces shown Go ahead bore torque rod holes ailerons coat inside thin CyA harden balsa careful clog up holes parts should given final sanding before covering preference cover plane before attaching ailerons ele vator rudder technique allows thorough covering job espe cially along hinge lines ends aileron stock Snapdragons far have covered Top Flite Super MonoKote planes design lends itself well glossy finish Super Mono Kote preference covering jobs have kept simple consistent Yellow chosen main color darker colors have variedthough usually metallics covering important remember color scheme should aid telling top model bottom espe cially plane quick small Trying see fin landing gear no fun get disoriented thats dragon wing dark underbelly help out Finish up hinging control surfaces preference Lake Hobbies Easy Hinges bond securely few drops thin Zap hinge slot easily made #11 X-Acto blade hinges require no pinning mount rudder first bend 1A6 tail wheel wire accept l-in-dia tail wheel Carl Goldberg nylon tail wheel bracket mounted slot tail wheel plate aligned Nyrod sleeve Insert tail wheel wire up through mount sleeve bend right angle cut shown side view plan Bore out /l6 hole rudder accept music wire hinge rudder place Mount ailerons elevator shown Mount landing gear two -20 bolts % long will shear off during rough landings wheels decided upon 2/2-in-dia Dave Brown Products Lite Flite Wheels bored out accept 46 axle Carl Goldberg Long Nylon Control Horus Snap-Links round out control linkage attaching control horn rudder recommend attaching over hole tail wheel wire inserts rudderfor added strength business end bird rec ommend Du-Bro 6-oz fuel tank Hayes P/N AL-25 engine mount Du-Bro tank fits perfectly fuel vent lines run straight out through fire wall no bends kinks Ive learued through experience Hayes mount very strong long enough allow move engine forward aft help balancing model flying has done using Zinger 9-5 props have performed well 25 29 engines best prop have found S-29 engine 9-55 Glass Nylon Prop manufactured Yo shioka Model Factory dont recommend trying low pitch 10-in prop 29 en gine model due lack prop clear ance Please remember safe flying rule Like RC aircraft Snapdrag can will bite stick fingers prop Continued page 32 May 1988 31 wing tip trailing edge tip final touches assembling wing Sand glue surface trailing edge tip follows airfoil shape otherwise bevel cut wood will cause tip droop down reflex upward Holes drilled hatches place sanding done plane ready covering Flat surfa ces square corners make covering model breeze control surfaces tail wheel will added last Dont misled solid surfaces plane comes out very light Littlest Miracle Workshop PROFESSIONAL TOOL Send 50 SUITABLE FOR ALLfor catalog HOBBIES AND CRAFTS Makers of. Mini-Glue 74s Stray- Tray Tee Bar Mini-Saw fuff-Stuff & Jewel Stripes SCALE RADIO_CONTROL OK VINTAGE sizes214 31/a 1334 11443/i 1145 P/86s/ LEI2L APPLIED DESIGN CORP PO Box 3384 Torrance CA 90510 WHEELS CONTROL-UNE FREE-FLIGHT NEW BALLOON 21/z4/2 314514 3 As stated before Supertigre S-29 Tigers Paw muffler faster 25 engines requires roughly 1 oz tail weight washer downthrust combination plane will literally pull itself vertically out hands dont try Enya 25XTV combo seems best plane moves out quickly doesnt require added weight 05 Max 25FP solid performer ones Ive seen dont have quite power Enya Install radio choice have used Futaba Conquest 4NL Air tronics SR4R find both excel lent Note elevator rudder ser vos mounted bit offset prevent crowding pushrods on-off switch charging jack mounted fuse lage side opposite engine exhaust receiver battery area Route re ceiver antenna outside fuselage away engine exhaust usually attach fin incorporate rubberband shock cord Always wrap receiver battery pack foam rubber prevent damage vibration impact Also enclose both plastic wrap prevent exposure raw fuel should fuel tank leak first flight set up ailerons 14 throw way rudder should begin 1 elevator % can crank up later like set up throws too hot plane can get away Right now flying about 1% rud der travel ator 3/ ailerons combination plenty hot still controllable help encouragement devel opment testing plane special thanks go Charles Downing Patrick OConnell Jeff Stoltzall fellow mem bers RAMS RC club WinstonSalem King area North Carolina Charlie contributed much advice aerodynamics structure plane Hes also great story two about adventures RC Charlie encouraged write up article about Snapdragon Patrick spent hours discussing improve upon popular Fun Fly designs ideas corporated Snapdragon Patrick plane awaits Jeff has put plane through its paces stamped seal approval clear day can found banks Yadkin River making shoestring-high inverted passes down runway other members RAMS have bitten lips during some ear lier fiascoes gentlemen am grateful please keep quiet SAFE FLYING IS NO ACCIDENT Recoil Tubing Fourmost Fourmost Recoil Tubing four foot length super tough fuel proof urethane Extends tubing preformed four inch coil Four Feet attached fuel can allows placement field box fuel can convenient distance air craft boat After use tubing will retract its original space -saving form out the soil out way Price $450 No 123 Size 1/8 lD information about Recoil Tubing other innovative model products Fourmost send stamped self-addressed business size envelope FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 503 357-2732 $265 repl strips Add 20% postage SMOOTH CONTOUR 3/4234 13/4 1143 11/2414 214514 GOLDEN AGE sizes21/i 314 13 114 43/i 1145 P/8 614 Send *3 fully illustrated catalog other kite accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS