mm m m rnw wwWW inin in — ww U wU w w modern-day adaptation Control Line Stunt fly ings earlier designs pleasing elliptical wings produces good looking model winning potential equal its rich heritage ETom Dixon IF YOU CANT BEAT emjoin emor saying goes Well join em Stunter After years pref erence 35-size planes am forced concede larger powerful model necessary competitive national level Although am entirely convinced yet larger model flies substantially better Ive come ad mit image presents current requirement play game suc cess Once Id decided move larger plane looked around what others doing New Jersey-New York area group flying SuperTigre-60-powered models widely varying sizes ranging Windy Urtnowskis huge Sweepers Glen Meadors Eagle latter being hardly larger models flying Fox 35s Atlanta Scott Bair has flying super-light semiscale models ST 60 two years now own homemade engines Frank Williams using ST 60 Profile Surrounded variety no consensus what might best opted simply enlarge Phoenixa revision Palmer Thunderbirdby multiplying linear dimensions 110% airfoils curved surfaces enlarged reproducing enlarging photocopy machine Along way too decided modernize look plane straightening out fuselage lines using bubble-type canopy Also landing gear moved farther out wing angled inward current style Wheel position moved slightly rearward better landings No changes made aerodynamics design result modifications hoped would Thunderbird 60 capable making better presentation judges still retaining excellent easy handling qualities smaller Phoe nix emerged engine tank control systems airplane size brand-new ground did like idea drilling conventional spraybar hole crank case hundred-dollar engine Also Scott Bairs work true venturi com monly referred sprinkler systems convinced better way venturi turned -in Delrin rod fit retained spraybar manner old G-21 ST 46 Control Line engine major difference stock Tigre-type venturi use fuel inlet hole done prevent engine occasionally getting air bubbles delivery system can lead erratic runs Final venturi size 182 ID may need varied plane flown hotter weather high altitude muffler used T-60 SST unit eight No 43 size holes open results very quiet presentation sacrificing power fact weight drag carrying engine under-stressed remains con stant four-cycle setting until four-leaf 66 Model Aviation clover momentarily burps two-cycle Using large prop also keeps noise down decreasing rpm Currently am using Top Flite 14-6 thinned about 50% blade thickness engine capable turning prop would necessitate longer landing gear belief almost current Stunters could benefit prop diameter people use high static thrust big prop gives better vertical pull line tension large disc area prevents model running away going downhill look full-scale aerobatic aircraft will confirm point have huge props fuel tank designed manufactured Doug Taffinder Thick ness chosen align fuel feed line spraybar tank resting motor mounts basically guess no experience tank should aligned 60 turned out fine exactly equal upright inverted lap times first flight onwards Length width tank chosen fit space available nose 1 x 2 x 6-in tank has volume between 7 7 oz ade quate AMA Pattern time limits Ac tually measure fuel tank am using 6 oz Doug Taflinder has tanks available special-order basis has dubbed Dixie 60 Write him details Carolina-TaWmder 8345 Delhi Rd North Charleston SC 29418 Phone 803/553-7169 cheap because handmade beautifully done well worth advantage Dixie 60 tank its mounting canted outwards rear ensures solid fuel feed throughout flight until uniflow vent uncovers just before fuel gone straight mounting can result occasional air bub bles toward end run can also result unused fuel attendant weight CG change problems Line length begun 69 ft center handlethe maximum allow able length AMA FAI rules No change has found necessary lines 018 cable 14-6 prop ground rpm setting 7300 gives fairly slow 55 56 seconds per lap solid tension maneuvers very windy conditions prop can changed 145 run 7800 rpm gives slightly constant speed defense against windupbut expense higher noise level necessity adjusting fuel volume maintain length run generally stay 14-6 control system uses conventional Top Flite three-inch nylon bellcrank X-cell /32 wire horns After experimenting making some -in wire horns felt just necessary Instead X-cell horn wires cut off re-bent short practical increase tor sion resistance recommend using flap horn length much over 3 September1987 67 Overall Views autnor says no startea OUT TO give ne juages wnu iney weni iu see scaled up original Phoenix Stunter larger 60-size model shown after just couple flights sold stable model its super Stunt flying qualities Larger diameter props 14 x 6 produce resistance down-maneuver speed increase lower revving also results less noise generation Since photo taken author says hes switched Merco 61 engine 3- 4-blade carbon fiber props have same effect large props provide better ground clearance elevator horn length over 2 model size unless horn wires m material belicrank mounted backwards effect precession P Factor anything else currently con troversial Rather done practical matter keep pushrod flaps straight possible clear center ribs keep wire bends toward outside circle order reduce load retaining washers major departure adapting Thunderbird take cue Stan Powell reduce sensitivity control system closest inside hole bellcrank used drive flap pushrod receiving hole flap horn inch hinge line flaps results very smooth system allows small inputs jerkiness using four-inch spacing handle reflexes similar almost im possible bounce corner over-con trolling model like quicker responses larger handle can always used HOLLOWED BALSAIIH BALSA5516 SQ BALSA BLOCS TOE N BOSTONSHEETINGLEADING EASE AO ISETABLE~Tf2I74 LEADOOTS 4I IH HALA OH BALSA SBEET BALSB Il6BAFSA VERY SAN WEBS IsV BALSA 55 BAA Sir CORE SE EL SE NOTCH 35 Ba LA SE OAF5 ECIASYFEAL HINGE SOSAFLOCOTION SAP BOCB THIS 5005 0A ST NATS RIB ESH ASTO FINA IS AlE SICK HIRE R-I STAT 651 LANDING GEARA15 EALSS HEFS STABILIZER RIGHT SIDE GOB A2SS BALSA CEA 15 BALSA ITRISCr SAL -iITI1~ -Z0~SHEET l~] ~4ThEN 0d 025AR5 BALSA01 0-CELL HORN SHORTEN TO 0ISO 515A BALSA SHEET ELEVATOR ISA BALSAO2 SHEETHINGE LOCATIONI Lead-outs receive special attention cause anticipated increase flight loads Brass-plated 027-in cable Perfect Co inserted soft brass tubing 2 ID bent teardrop shape bellcrank line attachment point tubing allows smooth bearing surface bellcrank spreads load cable also looks Pro Stunt Note Sullivan C-D lead-out cable too large fit 2 ID tubing discussing controls seems time ly talk some about trimming Stunters thing will notice build T 60 because its equal-panel wings lot tip weight necessary have weighed total ballast Id guess close three ounces Under FAI rules lighter lines may used case tip weight could less find tip weight gives effective line tension nonequal wings Besides semi-elliptical wing looks odd dif ficult build panel longer other T-60 tends build nose-heavy anticipation problem machined excess weight off spare cylinder head also built hatch add tail weight As turned out no tail weight needed 7A-oz lighter machined head neces 68 Model Aviation hatch rearwas included additional tail weightcould added getthe proper CG However after machining away part cylinder head no tall weight needed Small hatch outboard wing tip bot tom makes easy vary tip weight nec essaryto trim model non-symmetrical wing could have used building seml-ellptical wing panel longer other difficult also would look odd Becky Dixon shows off Thunderbird inspired paint scheme wide-stance landing gearon husbandTomsbigStunter Usingamodifled Byrons plug-inwing joiner allows large-span model fit smallest compact carsalso simplifies construction wing maintenance Only eight holes muffler help keep things quiet Note machined cylinder head modification stock venturi SuperTigre text has details Full-Size Plans Available. See Page 170 116 PLY RIB 1216 BALSA SHEETING128 RB BALSAPLY BELLERANK MOUNTNOR SO BALSA DOUBLERTRIM RIBS 10 FIT-LEON SDOUBLERFIT BETWEEN FUSE S BES NO EDGE OWER BALSA BLUER -- -r- r - Th1 LT ao INS 2 zL 128 BALSA IL __- __ __-__—__ 16 PETINI hi ISGEGOCRMAPLE1SOUBLER OP EW -II -IWIGANESBEEI LITEERMO 1216 BALSI IIII IflR52IRCENTER SROBIII BALSA C STRIPSSHEETING J7IiI IilliIIVRBALSAI IIII[III IIUSHEOBALAELOTHI K-11LW BALSA NEH-SHEET TIP H-N-NH-SH-A ___________---___LW H-HH-U -II ROTE OSE WING TIP WEIGHT ~-7~OH BOILD TIP FROM SOLID 31-lUG NALSA SHEET II -SUB UUU6E GRAIN -WALSA FLAPS 3232 BALSA 0-CELL HOWS-REBENO TO U SATURATE HORN HOLES RITR HINGE TD SalT THIN CYG TO STHENGTGEN 8006 1IjFA 04 247 WINO SPAR UOGTENINO NOTE IRREGULAR PH MEDIUM2 52H APLE MOTOR BOUNTS TOP SlEW- ONE RIGHT -ONE LEFT 0H HR BALSA 3232 bALSA SHEET N-IS 3232 BALSA UGEET N-Il N-IS 3216 BALSA SHEET 1232 PLO DOUBLERS 32I6 BALSA N-b 3230 BALSA HEET 12C ARBON FIBER REINFORCEMENT ADO TOP STRIPS BEFORE PLT NOSE DOUHLEH IS GORED HOTTOM STRIPS ARE GLUED AFTEG I WING IS INSTALLER FIN RUD 3216 BALSA SCRAF SHEETFILLSTAG UOulT / CANUFT IS II RIG WAIL 06 HOLLOWED I22 BALSA SHEET TO H-lU HOI BALSA BLUER TOP R-IIR-IZ NHOLLOW TO SUIT ITOLO-ALL MOTOR MOUNT OFFOCT ENGINEARROW SHAFT FUSELAGE SIDE VIEW B r-5AIR VENT TAFFINRER BIOIE 60 FUEL TANR INS- jZR021 Vk/32U2B0LS1 PLY BAFFLEc -32 BE 500 ILRLDGDREEI - IA~BLOS COWL _ NPLY28BALSAIBEROLASSNH SOROWICIIEO ART 22 BALSA BLOCKFUSE ORESPUSHROO WITHTWO 00 PLO N MAFLE ROlEMOTALUROTTOB HOLLOWER3232 MW ENOENS SLVO AIMGO2RPLHIIII1ZIOIUOI12080 SHEETIIIIA]HALOAI/j OAILHHIEEL H NWWHEELS12B BALSAiVh4f12P% 122I DIA BARNESMODEL AVIATION NOSE RING20A J0E2- F4A__THUNDERBIRD 60 LTEPSF 6CONTROL LINE PRECISION AIROBATIC ____ ESIGNED BY IOU DIXON TRACING BY OE DEMARCO sary balance plane model have built 20 years did have some tail weightor usually nose weightto bring trim might mention too during construction spinner backplate prop nut also machined down reduce nose heaviness lightness its extremities major factor planes ability groove proper CG Stunter heavy tail heavy nose both harder turn harder stop turning due mass operating long moment arm Too-heavy wing tips produces same effect roll axis Minor gusts make airplane bounce major advantage elliptical-type wings like T 60 tips build up light because much less wood extremities Think about next time consider building foam wing block tips extremely helpful novice have expert flier help trim plane expert can quickly figure out lead-outs need placed trim weight may needed whether flaps elevators need tweaked dial model in Atlanta find flying anothers ships brings twofold benefits flier gets anothers opinion what needed observer viewing plane outside circle can see things pilot cannot view well such flying wing slightly high low believe well worth traveling several hundred miles get together someone can help trim new plane rather struggle alone companionship worth too Flying Hand-Launched Gliders inci dentally has big payoff helping develop feel trim general Nothing else know can teach much price time involved Although learn way HLG directly applicable Control Line just may develop another good hobby get some exercise youre Free Flighters pretty good people too Construction Only unusual aspects construction will highlighted basic sequences same Phoenix Smoother articles MA Feb 1984 March 1985 respectively also assumed builders first scratch-built model cer tainly dont recommend such Wing Please note double leading edge planking center ribs added precaution against rough handling pulltesting lesser degree possible folding wing Remember trim ribs accordingly before assembling ternal wing structure difficult accurately once jig did learn rear center section can dou bled too have doubts about wings integrity Mine has held up fine 25-mph winds doubled rear planking have heard T-60 built early plans wing folded Since have talked builder however know hollowed things better left solid deviated plans some other way might explain buckling Also note webbing trailing edge essential MonoKote tissue covering used prevents flaps inducing twist wing reaction flaps being deflected Grain direction should vertical webbing fits should tight forced Spar material should super-light 4-lb balsa Medium-weight wood better Trailing edge sheeting should quarter-grain speckled-appearing wood both stiffness resistance against over-thinning shaping trailing edge capContinued page 150 September1987 69 race flexible push rod serves servo best nothing beats Gold-N-Rod Sullivan Products Because Gold-N-Rods unique design allows lowest friction accurate transfer motion around curves push rod market Heres Exclusive spline design dramatically reduces friction between inner outer rod Sullivans demanding quality control insures tight fit minimal play between inner outer rods Gold-N-Rods special temperature-resistant resins help keep model trim comes convenient applications Gold-N-Rod soars above competition Youll find installation snap adjustments easier using Gold-N-Rods complete kit push rods studs Gold-N-Clevises So dont get thrown curve Instead go gold Gold-N-Rod Sullivan return welcomed valuable contributions future articles Please con tact directly James J Noonan 7454 West Thurston Circle Milwaukee WI 53218 T-60/Dixon Continued page 69 Weight can readily saved hol lowing out spar within about /4 ribs sheeting after wing fully constructed hollow inboard landing gear locations Ribs should also hollowed leave bar vertically about halfway between spar trailing edge guard against covering shrink age flattening airfoil curvature Light5fP7oDroR PRODUC OeeNonhHa nO p Bo66 Bn 66022243000 0.JZ .k.d p. Made n ening holes should also cut nose sections ribs before sheeting grind away back leading edge strip using Robart sanding drum Dremel tool triangle shape left between ribs Fuselage Note 007-in carbon fiber strip reinforcing shown plans greatly augments fuselages resistance bending under air loads adding almost no weight also very important accurately shape wing cutouts perform wing-to-fuselage assembly parts inverted flat surface avoid bending fuselage crutch out alignment during assembly top crutch must remain straight line after wing installed avoid building unwanted incidence tail wheel mount much easier stronger method traditional copper wire lacing Simply place oversized 1/16 ply mount blanks vise drill between /16 drill make groove wire Sandwich tail gear wire between two ply pieces using thick CyA glue join Add maple anchor protruding end wire resist twisting trim whole assembly fit rear fuselage takes longer describe Moving other end take pains keep cowl very light Hollow out much possible coat inside nose cowl Hobby Poxy Formula 2 glue strength fuel resistance heated after application heat gun excess merely poured out heat thins glue soaks ac celerating cure-time Covering out side cowl silkspan helps finishing adds some strength Some people advocate covering nose glass cloth have found necessary canopy shown plans built up sheet balsa origlnal model used cut-down Sig 11-in WW II canopy softened distorted slightly during painting As result future models will have wood possibly fiberglass canopy Ex-Atlantan Lou Melancon avoid ed whole problem T-60 simulating canopy nose section much like Stan Powells Dove Lous plane finished MonoKote came out 4 oz lighter 53 oz also used Sig Chipmunk wheel pants distinctive touch Finishing choice finishing discretion builder model covered Sig Light Flite Plyspan tissue finished Sig nitrate butyrate Lite Coat dope rubbed out using progressively finer grades steel wool polished Dupont white compound waxed As mentioned Lou Melancon MonoKoted plane ex cellent results tip shape prevents usual problems covering wing tips MonoKote Take choice business family pressures am leaning more towards iron-on coverings timesaving ad vantages Further developments next gener ation T-60s will have two-piece plug-in wing removable tail surfaces twin enthusiasms large planes small automobiles forcing move another great advantage ease finishing maintenance individual components Easier storage shipping distant contest sites also pluses Europeans have building way years Well hint adapt plug-in system Byron Originals Continued page 152 150 Model Aviation push comes shove Sullivans Gold-N-Rod smoothest around curves IKON NWST PO Box 566 Dept AM Auburn WA 98071 206 941-8248 PRODUCTS FOR ThE ICCflhhtaflflEifl Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship 8 Performance NEW IMPROVED ** * * LI*lm Wst Medd wIla mare wauli Pews ITU5petenNooes * 7eW3 Oeien nvi1 yeaCORD * *WelarDry *Stick Abrasives * * A Keen Machine gives exceptional * sending control excellent finish 89 Basic nci 1 net Wand 1 eachp C 1 O8~ Soilile Special ncl 2 fiat 1 halfroved wend 5 6 gels 1 2gg Delco ncades 3 hat 2 vat roved *wands 1 beth weeds end tO oh *hgnis *Additional Wends Abrasives availablee C * WANDIT MANUFACTURING 214 2885789 * *PC Box 266 uite Texas 75149C uses its quarter-scale RC models Since plug-in system yet built flying details included would like information about work-in-progress can contacted Suite 401 1938 Peachtree Rd Atlanta GA 30309 Likewise have questions comments model presented feel free write did design building considerations work out its first com petition outing T-60 won 31st King Orange Stunt event Al Lewis Flyoff Trophy spent morning judging Old-Timer Stunt first official flight second total flight day first several hours believe testimony easy handling ac curate flying characteristics design pos sesses T-60 other important events remains seen thing sure though Im glad Ijomed em Im glad let Phoenix live new life larger bird CI Aerobatics/Fancher Continued page 70 hinge almost mandatory since can installedand fact should afterthe model covered Lets make perfectly clear surfaces hinged should slotted accept hinges prior covering Apply covering next seal right over hinge slots slots reopened sharp razor knife should hinges installed installing bellcrank two things very important First sure installation perfectly sound platform must rigidly supported properly glued using either epoxy aliphatic-resin glue bellcrank bolt should firmly tightened nut installed epoxy prevent loosening solder washers nylontype bellcranks pushrod retainers heat may melt nylon disrupt smooth control action use Y32-in Du-Bro wheel collars setscrews firmly tightened epoxied place Second sure flap end pushrod directly line inch above flap hinge line bellcrank neutral will allow proper alignment flap horn thus ensure whole control system will neutral simultaneously shaping sheet balsa flaps tail surfaces use rounded cross section shown plans Dont try taper too thin will unacceptably weakened Now time cut slots hinges Dont attempt get narrow gap between hinged surfaces what usually happens controls end up rubbing depriving both freedom range control movement Just leave natural gap results rounded pinned section hinge Shaping profile fuselage pain neck plywood doublers dont take well carving planing sanding shape seems imposing task Try way Assemble balsa profile fuselage hardwood engine mounts plywood doublers board -in thicker balsa tripler discussed last month Blend square rear edge ply doubler balsa fuse using piece scrap -in balsa already sanded triangular section Now comes tough part shaping front end Believe going sand sucker shape First clamp fuse work bench nose sticks out midair Use either large C-clamp some scrap hardwood protect balsa fuse pile old Model Aviation mags protect against snap ping fuse half shape place piece scrap hardwood under fuse support nose piece one-by-two about three feet long good Now using 2 x 12-in strip coarse 40-grit sandpaper attack side nose though buffing pair shoes As use buffing motion move fore aft removing material uniformly Youll surprised fast can shape front end plywood Now hard part done carve aft fuse pleasant shape using razor plane sandpaper Dont overly taper toward tail doing will weaken area allow tail flex flight Prior final shaping area permanently attach rudder has good solid joint fuselage can faired smoothly Although previous use iron-on coverings limited Top Flites MonoKote chose try Sigs new Supercoat material very pleased its performance activated much lower temperature somewhat Continued page 155 152 Model Aviation GREAT LAKES TRAINER T21A SPAN 64 115 SCALE SEND $200 FOR COMPLETE CATALOG OF FINE KITS 4 N@RTNEA8T AERODWEANICS Inc_______ aic L1BANONSTRET ORO MAINE 04073 517-460-IUl PERIOR DESIGN ORAFTSMANSHIPThe Finest Kits Youll Ever Buy Build Train-Air 20 Train-Air 40 Sport-Air 40 Bel-Air 40 40 Hydro-Floats EEL7A7IiO. Ths need easy handling superior serobatlc modern looking sport exhIbition biplane has filfed 5664k AS kit parta biplane tin line at- kita machine cut assist buIlding reaf ahow Sal-AIr 60 has fully sunimetrical wing sections ThIs gives greatest potential aerobatic panormance either upright inverted ship capable very slow close-in type flight right up rlgoroua aerobatic schedule can muster SPEC IFICATIONS ktgine Requirementany 60Fuesiage Width35 Wiep Span52WeIght RengeB 75 lbs WIng Area955 0Wing Loading Range14810 185 Fuselage Length46 207-490-1661 VIas Mastercard Accepted
Edition: Model Aviation - 1987/09
Page Numbers: 66, 67, 68, 69, 150, 152
mm m m rnw wwWW inin in — ww U wU w w modern-day adaptation Control Line Stunt fly ings earlier designs pleasing elliptical wings produces good looking model winning potential equal its rich heritage ETom Dixon IF YOU CANT BEAT emjoin emor saying goes Well join em Stunter After years pref erence 35-size planes am forced concede larger powerful model necessary competitive national level Although am entirely convinced yet larger model flies substantially better Ive come ad mit image presents current requirement play game suc cess Once Id decided move larger plane looked around what others doing New Jersey-New York area group flying SuperTigre-60-powered models widely varying sizes ranging Windy Urtnowskis huge Sweepers Glen Meadors Eagle latter being hardly larger models flying Fox 35s Atlanta Scott Bair has flying super-light semiscale models ST 60 two years now own homemade engines Frank Williams using ST 60 Profile Surrounded variety no consensus what might best opted simply enlarge Phoenixa revision Palmer Thunderbirdby multiplying linear dimensions 110% airfoils curved surfaces enlarged reproducing enlarging photocopy machine Along way too decided modernize look plane straightening out fuselage lines using bubble-type canopy Also landing gear moved farther out wing angled inward current style Wheel position moved slightly rearward better landings No changes made aerodynamics design result modifications hoped would Thunderbird 60 capable making better presentation judges still retaining excellent easy handling qualities smaller Phoe nix emerged engine tank control systems airplane size brand-new ground did like idea drilling conventional spraybar hole crank case hundred-dollar engine Also Scott Bairs work true venturi com monly referred sprinkler systems convinced better way venturi turned -in Delrin rod fit retained spraybar manner old G-21 ST 46 Control Line engine major difference stock Tigre-type venturi use fuel inlet hole done prevent engine occasionally getting air bubbles delivery system can lead erratic runs Final venturi size 182 ID may need varied plane flown hotter weather high altitude muffler used T-60 SST unit eight No 43 size holes open results very quiet presentation sacrificing power fact weight drag carrying engine under-stressed remains con stant four-cycle setting until four-leaf 66 Model Aviation clover momentarily burps two-cycle Using large prop also keeps noise down decreasing rpm Currently am using Top Flite 14-6 thinned about 50% blade thickness engine capable turning prop would necessitate longer landing gear belief almost current Stunters could benefit prop diameter people use high static thrust big prop gives better vertical pull line tension large disc area prevents model running away going downhill look full-scale aerobatic aircraft will confirm point have huge props fuel tank designed manufactured Doug Taffinder Thick ness chosen align fuel feed line spraybar tank resting motor mounts basically guess no experience tank should aligned 60 turned out fine exactly equal upright inverted lap times first flight onwards Length width tank chosen fit space available nose 1 x 2 x 6-in tank has volume between 7 7 oz ade quate AMA Pattern time limits Ac tually measure fuel tank am using 6 oz Doug Taflinder has tanks available special-order basis has dubbed Dixie 60 Write him details Carolina-TaWmder 8345 Delhi Rd North Charleston SC 29418 Phone 803/553-7169 cheap because handmade beautifully done well worth advantage Dixie 60 tank its mounting canted outwards rear ensures solid fuel feed throughout flight until uniflow vent uncovers just before fuel gone straight mounting can result occasional air bub bles toward end run can also result unused fuel attendant weight CG change problems Line length begun 69 ft center handlethe maximum allow able length AMA FAI rules No change has found necessary lines 018 cable 14-6 prop ground rpm setting 7300 gives fairly slow 55 56 seconds per lap solid tension maneuvers very windy conditions prop can changed 145 run 7800 rpm gives slightly constant speed defense against windupbut expense higher noise level necessity adjusting fuel volume maintain length run generally stay 14-6 control system uses conventional Top Flite three-inch nylon bellcrank X-cell /32 wire horns After experimenting making some -in wire horns felt just necessary Instead X-cell horn wires cut off re-bent short practical increase tor sion resistance recommend using flap horn length much over 3 September1987 67 Overall Views autnor says no startea OUT TO give ne juages wnu iney weni iu see scaled up original Phoenix Stunter larger 60-size model shown after just couple flights sold stable model its super Stunt flying qualities Larger diameter props 14 x 6 produce resistance down-maneuver speed increase lower revving also results less noise generation Since photo taken author says hes switched Merco 61 engine 3- 4-blade carbon fiber props have same effect large props provide better ground clearance elevator horn length over 2 model size unless horn wires m material belicrank mounted backwards effect precession P Factor anything else currently con troversial Rather done practical matter keep pushrod flaps straight possible clear center ribs keep wire bends toward outside circle order reduce load retaining washers major departure adapting Thunderbird take cue Stan Powell reduce sensitivity control system closest inside hole bellcrank used drive flap pushrod receiving hole flap horn inch hinge line flaps results very smooth system allows small inputs jerkiness using four-inch spacing handle reflexes similar almost im possible bounce corner over-con trolling model like quicker responses larger handle can always used HOLLOWED BALSAIIH BALSA5516 SQ BALSA BLOCS TOE N BOSTONSHEETINGLEADING EASE AO ISETABLE~Tf2I74 LEADOOTS 4I IH HALA OH BALSA SBEET BALSB Il6BAFSA VERY SAN WEBS IsV BALSA 55 BAA Sir CORE SE EL SE NOTCH 35 Ba LA SE OAF5 ECIASYFEAL HINGE SOSAFLOCOTION SAP BOCB THIS 5005 0A ST NATS RIB ESH ASTO FINA IS AlE SICK HIRE R-I STAT 651 LANDING GEARA15 EALSS HEFS STABILIZER RIGHT SIDE GOB A2SS BALSA CEA 15 BALSA ITRISCr SAL -iITI1~ -Z0~SHEET l~] ~4ThEN 0d 025AR5 BALSA01 0-CELL HORN SHORTEN TO 0ISO 515A BALSA SHEET ELEVATOR ISA BALSAO2 SHEETHINGE LOCATIONI Lead-outs receive special attention cause anticipated increase flight loads Brass-plated 027-in cable Perfect Co inserted soft brass tubing 2 ID bent teardrop shape bellcrank line attachment point tubing allows smooth bearing surface bellcrank spreads load cable also looks Pro Stunt Note Sullivan C-D lead-out cable too large fit 2 ID tubing discussing controls seems time ly talk some about trimming Stunters thing will notice build T 60 because its equal-panel wings lot tip weight necessary have weighed total ballast Id guess close three ounces Under FAI rules lighter lines may used case tip weight could less find tip weight gives effective line tension nonequal wings Besides semi-elliptical wing looks odd dif ficult build panel longer other T-60 tends build nose-heavy anticipation problem machined excess weight off spare cylinder head also built hatch add tail weight As turned out no tail weight needed 7A-oz lighter machined head neces 68 Model Aviation hatch rearwas included additional tail weightcould added getthe proper CG However after machining away part cylinder head no tall weight needed Small hatch outboard wing tip bot tom makes easy vary tip weight nec essaryto trim model non-symmetrical wing could have used building seml-ellptical wing panel longer other difficult also would look odd Becky Dixon shows off Thunderbird inspired paint scheme wide-stance landing gearon husbandTomsbigStunter Usingamodifled Byrons plug-inwing joiner allows large-span model fit smallest compact carsalso simplifies construction wing maintenance Only eight holes muffler help keep things quiet Note machined cylinder head modification stock venturi SuperTigre text has details Full-Size Plans Available. See Page 170 116 PLY RIB 1216 BALSA SHEETING128 RB BALSAPLY BELLERANK MOUNTNOR SO BALSA DOUBLERTRIM RIBS 10 FIT-LEON SDOUBLERFIT BETWEEN FUSE S BES NO EDGE OWER BALSA BLUER -- -r- r - Th1 LT ao INS 2 zL 128 BALSA IL __- __ __-__—__ 16 PETINI hi ISGEGOCRMAPLE1SOUBLER OP EW -II -IWIGANESBEEI LITEERMO 1216 BALSI IIII IflR52IRCENTER SROBIII BALSA C STRIPSSHEETING J7IiI IilliIIVRBALSAI IIII[III IIUSHEOBALAELOTHI K-11LW BALSA NEH-SHEET TIP H-N-NH-SH-A ___________---___LW H-HH-U -II ROTE OSE WING TIP WEIGHT ~-7~OH BOILD TIP FROM SOLID 31-lUG NALSA SHEET II -SUB UUU6E GRAIN -WALSA FLAPS 3232 BALSA 0-CELL HOWS-REBENO TO U SATURATE HORN HOLES RITR HINGE TD SalT THIN CYG TO STHENGTGEN 8006 1IjFA 04 247 WINO SPAR UOGTENINO NOTE IRREGULAR PH MEDIUM2 52H APLE MOTOR BOUNTS TOP SlEW- ONE RIGHT -ONE LEFT 0H HR BALSA 3232 bALSA SHEET N-IS 3232 BALSA UGEET N-Il N-IS 3216 BALSA SHEET 1232 PLO DOUBLERS 32I6 BALSA N-b 3230 BALSA HEET 12C ARBON FIBER REINFORCEMENT ADO TOP STRIPS BEFORE PLT NOSE DOUHLEH IS GORED HOTTOM STRIPS ARE GLUED AFTEG I WING IS INSTALLER FIN RUD 3216 BALSA SCRAF SHEETFILLSTAG UOulT / CANUFT IS II RIG WAIL 06 HOLLOWED I22 BALSA SHEET TO H-lU HOI BALSA BLUER TOP R-IIR-IZ NHOLLOW TO SUIT ITOLO-ALL MOTOR MOUNT OFFOCT ENGINEARROW SHAFT FUSELAGE SIDE VIEW B r-5AIR VENT TAFFINRER BIOIE 60 FUEL TANR INS- jZR021 Vk/32U2B0LS1 PLY BAFFLEc -32 BE 500 ILRLDGDREEI - IA~BLOS COWL _ NPLY28BALSAIBEROLASSNH SOROWICIIEO ART 22 BALSA BLOCKFUSE ORESPUSHROO WITHTWO 00 PLO N MAFLE ROlEMOTALUROTTOB HOLLOWER3232 MW ENOENS SLVO AIMGO2RPLHIIII1ZIOIUOI12080 SHEETIIIIA]HALOAI/j OAILHHIEEL H NWWHEELS12B BALSAiVh4f12P% 122I DIA BARNESMODEL AVIATION NOSE RING20A J0E2- F4A__THUNDERBIRD 60 LTEPSF 6CONTROL LINE PRECISION AIROBATIC ____ ESIGNED BY IOU DIXON TRACING BY OE DEMARCO sary balance plane model have built 20 years did have some tail weightor usually nose weightto bring trim might mention too during construction spinner backplate prop nut also machined down reduce nose heaviness lightness its extremities major factor planes ability groove proper CG Stunter heavy tail heavy nose both harder turn harder stop turning due mass operating long moment arm Too-heavy wing tips produces same effect roll axis Minor gusts make airplane bounce major advantage elliptical-type wings like T 60 tips build up light because much less wood extremities Think about next time consider building foam wing block tips extremely helpful novice have expert flier help trim plane expert can quickly figure out lead-outs need placed trim weight may needed whether flaps elevators need tweaked dial model in Atlanta find flying anothers ships brings twofold benefits flier gets anothers opinion what needed observer viewing plane outside circle can see things pilot cannot view well such flying wing slightly high low believe well worth traveling several hundred miles get together someone can help trim new plane rather struggle alone companionship worth too Flying Hand-Launched Gliders inci dentally has big payoff helping develop feel trim general Nothing else know can teach much price time involved Although learn way HLG directly applicable Control Line just may develop another good hobby get some exercise youre Free Flighters pretty good people too Construction Only unusual aspects construction will highlighted basic sequences same Phoenix Smoother articles MA Feb 1984 March 1985 respectively also assumed builders first scratch-built model cer tainly dont recommend such Wing Please note double leading edge planking center ribs added precaution against rough handling pulltesting lesser degree possible folding wing Remember trim ribs accordingly before assembling ternal wing structure difficult accurately once jig did learn rear center section can dou bled too have doubts about wings integrity Mine has held up fine 25-mph winds doubled rear planking have heard T-60 built early plans wing folded Since have talked builder however know hollowed things better left solid deviated plans some other way might explain buckling Also note webbing trailing edge essential MonoKote tissue covering used prevents flaps inducing twist wing reaction flaps being deflected Grain direction should vertical webbing fits should tight forced Spar material should super-light 4-lb balsa Medium-weight wood better Trailing edge sheeting should quarter-grain speckled-appearing wood both stiffness resistance against over-thinning shaping trailing edge capContinued page 150 September1987 69 race flexible push rod serves servo best nothing beats Gold-N-Rod Sullivan Products Because Gold-N-Rods unique design allows lowest friction accurate transfer motion around curves push rod market Heres Exclusive spline design dramatically reduces friction between inner outer rod Sullivans demanding quality control insures tight fit minimal play between inner outer rods Gold-N-Rods special temperature-resistant resins help keep model trim comes convenient applications Gold-N-Rod soars above competition Youll find installation snap adjustments easier using Gold-N-Rods complete kit push rods studs Gold-N-Clevises So dont get thrown curve Instead go gold Gold-N-Rod Sullivan return welcomed valuable contributions future articles Please con tact directly James J Noonan 7454 West Thurston Circle Milwaukee WI 53218 T-60/Dixon Continued page 69 Weight can readily saved hol lowing out spar within about /4 ribs sheeting after wing fully constructed hollow inboard landing gear locations Ribs should also hollowed leave bar vertically about halfway between spar trailing edge guard against covering shrink age flattening airfoil curvature Light5fP7oDroR PRODUC OeeNonhHa nO p Bo66 Bn 66022243000 0.JZ .k.d p. Made n ening holes should also cut nose sections ribs before sheeting grind away back leading edge strip using Robart sanding drum Dremel tool triangle shape left between ribs Fuselage Note 007-in carbon fiber strip reinforcing shown plans greatly augments fuselages resistance bending under air loads adding almost no weight also very important accurately shape wing cutouts perform wing-to-fuselage assembly parts inverted flat surface avoid bending fuselage crutch out alignment during assembly top crutch must remain straight line after wing installed avoid building unwanted incidence tail wheel mount much easier stronger method traditional copper wire lacing Simply place oversized 1/16 ply mount blanks vise drill between /16 drill make groove wire Sandwich tail gear wire between two ply pieces using thick CyA glue join Add maple anchor protruding end wire resist twisting trim whole assembly fit rear fuselage takes longer describe Moving other end take pains keep cowl very light Hollow out much possible coat inside nose cowl Hobby Poxy Formula 2 glue strength fuel resistance heated after application heat gun excess merely poured out heat thins glue soaks ac celerating cure-time Covering out side cowl silkspan helps finishing adds some strength Some people advocate covering nose glass cloth have found necessary canopy shown plans built up sheet balsa origlnal model used cut-down Sig 11-in WW II canopy softened distorted slightly during painting As result future models will have wood possibly fiberglass canopy Ex-Atlantan Lou Melancon avoid ed whole problem T-60 simulating canopy nose section much like Stan Powells Dove Lous plane finished MonoKote came out 4 oz lighter 53 oz also used Sig Chipmunk wheel pants distinctive touch Finishing choice finishing discretion builder model covered Sig Light Flite Plyspan tissue finished Sig nitrate butyrate Lite Coat dope rubbed out using progressively finer grades steel wool polished Dupont white compound waxed As mentioned Lou Melancon MonoKoted plane ex cellent results tip shape prevents usual problems covering wing tips MonoKote Take choice business family pressures am leaning more towards iron-on coverings timesaving ad vantages Further developments next gener ation T-60s will have two-piece plug-in wing removable tail surfaces twin enthusiasms large planes small automobiles forcing move another great advantage ease finishing maintenance individual components Easier storage shipping distant contest sites also pluses Europeans have building way years Well hint adapt plug-in system Byron Originals Continued page 152 150 Model Aviation push comes shove Sullivans Gold-N-Rod smoothest around curves IKON NWST PO Box 566 Dept AM Auburn WA 98071 206 941-8248 PRODUCTS FOR ThE ICCflhhtaflflEifl Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship 8 Performance NEW IMPROVED ** * * LI*lm Wst Medd wIla mare wauli Pews ITU5petenNooes * 7eW3 Oeien nvi1 yeaCORD * *WelarDry *Stick Abrasives * * A Keen Machine gives exceptional * sending control excellent finish 89 Basic nci 1 net Wand 1 eachp C 1 O8~ Soilile Special ncl 2 fiat 1 halfroved wend 5 6 gels 1 2gg Delco ncades 3 hat 2 vat roved *wands 1 beth weeds end tO oh *hgnis *Additional Wends Abrasives availablee C * WANDIT MANUFACTURING 214 2885789 * *PC Box 266 uite Texas 75149C uses its quarter-scale RC models Since plug-in system yet built flying details included would like information about work-in-progress can contacted Suite 401 1938 Peachtree Rd Atlanta GA 30309 Likewise have questions comments model presented feel free write did design building considerations work out its first com petition outing T-60 won 31st King Orange Stunt event Al Lewis Flyoff Trophy spent morning judging Old-Timer Stunt first official flight second total flight day first several hours believe testimony easy handling ac curate flying characteristics design pos sesses T-60 other important events remains seen thing sure though Im glad Ijomed em Im glad let Phoenix live new life larger bird CI Aerobatics/Fancher Continued page 70 hinge almost mandatory since can installedand fact should afterthe model covered Lets make perfectly clear surfaces hinged should slotted accept hinges prior covering Apply covering next seal right over hinge slots slots reopened sharp razor knife should hinges installed installing bellcrank two things very important First sure installation perfectly sound platform must rigidly supported properly glued using either epoxy aliphatic-resin glue bellcrank bolt should firmly tightened nut installed epoxy prevent loosening solder washers nylontype bellcranks pushrod retainers heat may melt nylon disrupt smooth control action use Y32-in Du-Bro wheel collars setscrews firmly tightened epoxied place Second sure flap end pushrod directly line inch above flap hinge line bellcrank neutral will allow proper alignment flap horn thus ensure whole control system will neutral simultaneously shaping sheet balsa flaps tail surfaces use rounded cross section shown plans Dont try taper too thin will unacceptably weakened Now time cut slots hinges Dont attempt get narrow gap between hinged surfaces what usually happens controls end up rubbing depriving both freedom range control movement Just leave natural gap results rounded pinned section hinge Shaping profile fuselage pain neck plywood doublers dont take well carving planing sanding shape seems imposing task Try way Assemble balsa profile fuselage hardwood engine mounts plywood doublers board -in thicker balsa tripler discussed last month Blend square rear edge ply doubler balsa fuse using piece scrap -in balsa already sanded triangular section Now comes tough part shaping front end Believe going sand sucker shape First clamp fuse work bench nose sticks out midair Use either large C-clamp some scrap hardwood protect balsa fuse pile old Model Aviation mags protect against snap ping fuse half shape place piece scrap hardwood under fuse support nose piece one-by-two about three feet long good Now using 2 x 12-in strip coarse 40-grit sandpaper attack side nose though buffing pair shoes As use buffing motion move fore aft removing material uniformly Youll surprised fast can shape front end plywood Now hard part done carve aft fuse pleasant shape using razor plane sandpaper Dont overly taper toward tail doing will weaken area allow tail flex flight Prior final shaping area permanently attach rudder has good solid joint fuselage can faired smoothly Although previous use iron-on coverings limited Top Flites MonoKote chose try Sigs new Supercoat material very pleased its performance activated much lower temperature somewhat Continued page 155 152 Model Aviation GREAT LAKES TRAINER T21A SPAN 64 115 SCALE SEND $200 FOR COMPLETE CATALOG OF FINE KITS 4 N@RTNEA8T AERODWEANICS Inc_______ aic L1BANONSTRET ORO MAINE 04073 517-460-IUl PERIOR DESIGN ORAFTSMANSHIPThe Finest Kits Youll Ever Buy Build Train-Air 20 Train-Air 40 Sport-Air 40 Bel-Air 40 40 Hydro-Floats EEL7A7IiO. Ths need easy handling superior serobatlc modern looking sport exhIbition biplane has filfed 5664k AS kit parta biplane tin line at- kita machine cut assist buIlding reaf ahow Sal-AIr 60 has fully sunimetrical wing sections ThIs gives greatest potential aerobatic panormance either upright inverted ship capable very slow close-in type flight right up rlgoroua aerobatic schedule can muster SPEC IFICATIONS ktgine Requirementany 60Fuesiage Width35 Wiep Span52WeIght RengeB 75 lbs WIng Area955 0Wing Loading Range14810 185 Fuselage Length46 207-490-1661 VIas Mastercard Accepted
Edition: Model Aviation - 1987/09
Page Numbers: 66, 67, 68, 69, 150, 152
mm m m rnw wwWW inin in — ww U wU w w modern-day adaptation Control Line Stunt fly ings earlier designs pleasing elliptical wings produces good looking model winning potential equal its rich heritage ETom Dixon IF YOU CANT BEAT emjoin emor saying goes Well join em Stunter After years pref erence 35-size planes am forced concede larger powerful model necessary competitive national level Although am entirely convinced yet larger model flies substantially better Ive come ad mit image presents current requirement play game suc cess Once Id decided move larger plane looked around what others doing New Jersey-New York area group flying SuperTigre-60-powered models widely varying sizes ranging Windy Urtnowskis huge Sweepers Glen Meadors Eagle latter being hardly larger models flying Fox 35s Atlanta Scott Bair has flying super-light semiscale models ST 60 two years now own homemade engines Frank Williams using ST 60 Profile Surrounded variety no consensus what might best opted simply enlarge Phoenixa revision Palmer Thunderbirdby multiplying linear dimensions 110% airfoils curved surfaces enlarged reproducing enlarging photocopy machine Along way too decided modernize look plane straightening out fuselage lines using bubble-type canopy Also landing gear moved farther out wing angled inward current style Wheel position moved slightly rearward better landings No changes made aerodynamics design result modifications hoped would Thunderbird 60 capable making better presentation judges still retaining excellent easy handling qualities smaller Phoe nix emerged engine tank control systems airplane size brand-new ground did like idea drilling conventional spraybar hole crank case hundred-dollar engine Also Scott Bairs work true venturi com monly referred sprinkler systems convinced better way venturi turned -in Delrin rod fit retained spraybar manner old G-21 ST 46 Control Line engine major difference stock Tigre-type venturi use fuel inlet hole done prevent engine occasionally getting air bubbles delivery system can lead erratic runs Final venturi size 182 ID may need varied plane flown hotter weather high altitude muffler used T-60 SST unit eight No 43 size holes open results very quiet presentation sacrificing power fact weight drag carrying engine under-stressed remains con stant four-cycle setting until four-leaf 66 Model Aviation clover momentarily burps two-cycle Using large prop also keeps noise down decreasing rpm Currently am using Top Flite 14-6 thinned about 50% blade thickness engine capable turning prop would necessitate longer landing gear belief almost current Stunters could benefit prop diameter people use high static thrust big prop gives better vertical pull line tension large disc area prevents model running away going downhill look full-scale aerobatic aircraft will confirm point have huge props fuel tank designed manufactured Doug Taffinder Thick ness chosen align fuel feed line spraybar tank resting motor mounts basically guess no experience tank should aligned 60 turned out fine exactly equal upright inverted lap times first flight onwards Length width tank chosen fit space available nose 1 x 2 x 6-in tank has volume between 7 7 oz ade quate AMA Pattern time limits Ac tually measure fuel tank am using 6 oz Doug Taflinder has tanks available special-order basis has dubbed Dixie 60 Write him details Carolina-TaWmder 8345 Delhi Rd North Charleston SC 29418 Phone 803/553-7169 cheap because handmade beautifully done well worth advantage Dixie 60 tank its mounting canted outwards rear ensures solid fuel feed throughout flight until uniflow vent uncovers just before fuel gone straight mounting can result occasional air bub bles toward end run can also result unused fuel attendant weight CG change problems Line length begun 69 ft center handlethe maximum allow able length AMA FAI rules No change has found necessary lines 018 cable 14-6 prop ground rpm setting 7300 gives fairly slow 55 56 seconds per lap solid tension maneuvers very windy conditions prop can changed 145 run 7800 rpm gives slightly constant speed defense against windupbut expense higher noise level necessity adjusting fuel volume maintain length run generally stay 14-6 control system uses conventional Top Flite three-inch nylon bellcrank X-cell /32 wire horns After experimenting making some -in wire horns felt just necessary Instead X-cell horn wires cut off re-bent short practical increase tor sion resistance recommend using flap horn length much over 3 September1987 67 Overall Views autnor says no startea OUT TO give ne juages wnu iney weni iu see scaled up original Phoenix Stunter larger 60-size model shown after just couple flights sold stable model its super Stunt flying qualities Larger diameter props 14 x 6 produce resistance down-maneuver speed increase lower revving also results less noise generation Since photo taken author says hes switched Merco 61 engine 3- 4-blade carbon fiber props have same effect large props provide better ground clearance elevator horn length over 2 model size unless horn wires m material belicrank mounted backwards effect precession P Factor anything else currently con troversial Rather done practical matter keep pushrod flaps straight possible clear center ribs keep wire bends toward outside circle order reduce load retaining washers major departure adapting Thunderbird take cue Stan Powell reduce sensitivity control system closest inside hole bellcrank used drive flap pushrod receiving hole flap horn inch hinge line flaps results very smooth system allows small inputs jerkiness using four-inch spacing handle reflexes similar almost im possible bounce corner over-con trolling model like quicker responses larger handle can always used HOLLOWED BALSAIIH BALSA5516 SQ BALSA BLOCS TOE N BOSTONSHEETINGLEADING EASE AO ISETABLE~Tf2I74 LEADOOTS 4I IH HALA OH BALSA SBEET BALSB Il6BAFSA VERY SAN WEBS IsV BALSA 55 BAA Sir CORE SE EL SE NOTCH 35 Ba LA SE OAF5 ECIASYFEAL HINGE SOSAFLOCOTION SAP BOCB THIS 5005 0A ST NATS RIB ESH ASTO FINA IS AlE SICK HIRE R-I STAT 651 LANDING GEARA15 EALSS HEFS STABILIZER RIGHT SIDE GOB A2SS BALSA CEA 15 BALSA ITRISCr SAL -iITI1~ -Z0~SHEET l~] ~4ThEN 0d 025AR5 BALSA01 0-CELL HORN SHORTEN TO 0ISO 515A BALSA SHEET ELEVATOR ISA BALSAO2 SHEETHINGE LOCATIONI Lead-outs receive special attention cause anticipated increase flight loads Brass-plated 027-in cable Perfect Co inserted soft brass tubing 2 ID bent teardrop shape bellcrank line attachment point tubing allows smooth bearing surface bellcrank spreads load cable also looks Pro Stunt Note Sullivan C-D lead-out cable too large fit 2 ID tubing discussing controls seems time ly talk some about trimming Stunters thing will notice build T 60 because its equal-panel wings lot tip weight necessary have weighed total ballast Id guess close three ounces Under FAI rules lighter lines may used case tip weight could less find tip weight gives effective line tension nonequal wings Besides semi-elliptical wing looks odd dif ficult build panel longer other T-60 tends build nose-heavy anticipation problem machined excess weight off spare cylinder head also built hatch add tail weight As turned out no tail weight needed 7A-oz lighter machined head neces 68 Model Aviation hatch rearwas included additional tail weightcould added getthe proper CG However after machining away part cylinder head no tall weight needed Small hatch outboard wing tip bot tom makes easy vary tip weight nec essaryto trim model non-symmetrical wing could have used building seml-ellptical wing panel longer other difficult also would look odd Becky Dixon shows off Thunderbird inspired paint scheme wide-stance landing gearon husbandTomsbigStunter Usingamodifled Byrons plug-inwing joiner allows large-span model fit smallest compact carsalso simplifies construction wing maintenance Only eight holes muffler help keep things quiet Note machined cylinder head modification stock venturi SuperTigre text has details Full-Size Plans Available. See Page 170 116 PLY RIB 1216 BALSA SHEETING128 RB BALSAPLY BELLERANK MOUNTNOR SO BALSA DOUBLERTRIM RIBS 10 FIT-LEON SDOUBLERFIT BETWEEN FUSE S BES NO EDGE OWER BALSA BLUER -- -r- r - Th1 LT ao INS 2 zL 128 BALSA IL __- __ __-__—__ 16 PETINI hi ISGEGOCRMAPLE1SOUBLER OP EW -II -IWIGANESBEEI LITEERMO 1216 BALSI IIII IflR52IRCENTER SROBIII BALSA C STRIPSSHEETING J7IiI IilliIIVRBALSAI IIII[III IIUSHEOBALAELOTHI K-11LW BALSA NEH-SHEET TIP H-N-NH-SH-A ___________---___LW H-HH-U -II ROTE OSE WING TIP WEIGHT ~-7~OH BOILD TIP FROM SOLID 31-lUG NALSA SHEET II -SUB UUU6E GRAIN -WALSA FLAPS 3232 BALSA 0-CELL HOWS-REBENO TO U SATURATE HORN HOLES RITR HINGE TD SalT THIN CYG TO STHENGTGEN 8006 1IjFA 04 247 WINO SPAR UOGTENINO NOTE IRREGULAR PH MEDIUM2 52H APLE MOTOR BOUNTS TOP SlEW- ONE RIGHT -ONE LEFT 0H HR BALSA 3232 bALSA SHEET N-IS 3232 BALSA UGEET N-Il N-IS 3216 BALSA SHEET 1232 PLO DOUBLERS 32I6 BALSA N-b 3230 BALSA HEET 12C ARBON FIBER REINFORCEMENT ADO TOP STRIPS BEFORE PLT NOSE DOUHLEH IS GORED HOTTOM STRIPS ARE GLUED AFTEG I WING IS INSTALLER FIN RUD 3216 BALSA SCRAF SHEETFILLSTAG UOulT / CANUFT IS II RIG WAIL 06 HOLLOWED I22 BALSA SHEET TO H-lU HOI BALSA BLUER TOP R-IIR-IZ NHOLLOW TO SUIT ITOLO-ALL MOTOR MOUNT OFFOCT ENGINEARROW SHAFT FUSELAGE SIDE VIEW B r-5AIR VENT TAFFINRER BIOIE 60 FUEL TANR INS- jZR021 Vk/32U2B0LS1 PLY BAFFLEc -32 BE 500 ILRLDGDREEI - IA~BLOS COWL _ NPLY28BALSAIBEROLASSNH SOROWICIIEO ART 22 BALSA BLOCKFUSE ORESPUSHROO WITHTWO 00 PLO N MAFLE ROlEMOTALUROTTOB HOLLOWER3232 MW ENOENS SLVO AIMGO2RPLHIIII1ZIOIUOI12080 SHEETIIIIA]HALOAI/j OAILHHIEEL H NWWHEELS12B BALSAiVh4f12P% 122I DIA BARNESMODEL AVIATION NOSE RING20A J0E2- F4A__THUNDERBIRD 60 LTEPSF 6CONTROL LINE PRECISION AIROBATIC ____ ESIGNED BY IOU DIXON TRACING BY OE DEMARCO sary balance plane model have built 20 years did have some tail weightor usually nose weightto bring trim might mention too during construction spinner backplate prop nut also machined down reduce nose heaviness lightness its extremities major factor planes ability groove proper CG Stunter heavy tail heavy nose both harder turn harder stop turning due mass operating long moment arm Too-heavy wing tips produces same effect roll axis Minor gusts make airplane bounce major advantage elliptical-type wings like T 60 tips build up light because much less wood extremities Think about next time consider building foam wing block tips extremely helpful novice have expert flier help trim plane expert can quickly figure out lead-outs need placed trim weight may needed whether flaps elevators need tweaked dial model in Atlanta find flying anothers ships brings twofold benefits flier gets anothers opinion what needed observer viewing plane outside circle can see things pilot cannot view well such flying wing slightly high low believe well worth traveling several hundred miles get together someone can help trim new plane rather struggle alone companionship worth too Flying Hand-Launched Gliders inci dentally has big payoff helping develop feel trim general Nothing else know can teach much price time involved Although learn way HLG directly applicable Control Line just may develop another good hobby get some exercise youre Free Flighters pretty good people too Construction Only unusual aspects construction will highlighted basic sequences same Phoenix Smoother articles MA Feb 1984 March 1985 respectively also assumed builders first scratch-built model cer tainly dont recommend such Wing Please note double leading edge planking center ribs added precaution against rough handling pulltesting lesser degree possible folding wing Remember trim ribs accordingly before assembling ternal wing structure difficult accurately once jig did learn rear center section can dou bled too have doubts about wings integrity Mine has held up fine 25-mph winds doubled rear planking have heard T-60 built early plans wing folded Since have talked builder however know hollowed things better left solid deviated plans some other way might explain buckling Also note webbing trailing edge essential MonoKote tissue covering used prevents flaps inducing twist wing reaction flaps being deflected Grain direction should vertical webbing fits should tight forced Spar material should super-light 4-lb balsa Medium-weight wood better Trailing edge sheeting should quarter-grain speckled-appearing wood both stiffness resistance against over-thinning shaping trailing edge capContinued page 150 September1987 69 race flexible push rod serves servo best nothing beats Gold-N-Rod Sullivan Products Because Gold-N-Rods unique design allows lowest friction accurate transfer motion around curves push rod market Heres Exclusive spline design dramatically reduces friction between inner outer rod Sullivans demanding quality control insures tight fit minimal play between inner outer rods Gold-N-Rods special temperature-resistant resins help keep model trim comes convenient applications Gold-N-Rod soars above competition Youll find installation snap adjustments easier using Gold-N-Rods complete kit push rods studs Gold-N-Clevises So dont get thrown curve Instead go gold Gold-N-Rod Sullivan return welcomed valuable contributions future articles Please con tact directly James J Noonan 7454 West Thurston Circle Milwaukee WI 53218 T-60/Dixon Continued page 69 Weight can readily saved hol lowing out spar within about /4 ribs sheeting after wing fully constructed hollow inboard landing gear locations Ribs should also hollowed leave bar vertically about halfway between spar trailing edge guard against covering shrink age flattening airfoil curvature Light5fP7oDroR PRODUC OeeNonhHa nO p Bo66 Bn 66022243000 0.JZ .k.d p. Made n ening holes should also cut nose sections ribs before sheeting grind away back leading edge strip using Robart sanding drum Dremel tool triangle shape left between ribs Fuselage Note 007-in carbon fiber strip reinforcing shown plans greatly augments fuselages resistance bending under air loads adding almost no weight also very important accurately shape wing cutouts perform wing-to-fuselage assembly parts inverted flat surface avoid bending fuselage crutch out alignment during assembly top crutch must remain straight line after wing installed avoid building unwanted incidence tail wheel mount much easier stronger method traditional copper wire lacing Simply place oversized 1/16 ply mount blanks vise drill between /16 drill make groove wire Sandwich tail gear wire between two ply pieces using thick CyA glue join Add maple anchor protruding end wire resist twisting trim whole assembly fit rear fuselage takes longer describe Moving other end take pains keep cowl very light Hollow out much possible coat inside nose cowl Hobby Poxy Formula 2 glue strength fuel resistance heated after application heat gun excess merely poured out heat thins glue soaks ac celerating cure-time Covering out side cowl silkspan helps finishing adds some strength Some people advocate covering nose glass cloth have found necessary canopy shown plans built up sheet balsa origlnal model used cut-down Sig 11-in WW II canopy softened distorted slightly during painting As result future models will have wood possibly fiberglass canopy Ex-Atlantan Lou Melancon avoid ed whole problem T-60 simulating canopy nose section much like Stan Powells Dove Lous plane finished MonoKote came out 4 oz lighter 53 oz also used Sig Chipmunk wheel pants distinctive touch Finishing choice finishing discretion builder model covered Sig Light Flite Plyspan tissue finished Sig nitrate butyrate Lite Coat dope rubbed out using progressively finer grades steel wool polished Dupont white compound waxed As mentioned Lou Melancon MonoKoted plane ex cellent results tip shape prevents usual problems covering wing tips MonoKote Take choice business family pressures am leaning more towards iron-on coverings timesaving ad vantages Further developments next gener ation T-60s will have two-piece plug-in wing removable tail surfaces twin enthusiasms large planes small automobiles forcing move another great advantage ease finishing maintenance individual components Easier storage shipping distant contest sites also pluses Europeans have building way years Well hint adapt plug-in system Byron Originals Continued page 152 150 Model Aviation push comes shove Sullivans Gold-N-Rod smoothest around curves IKON NWST PO Box 566 Dept AM Auburn WA 98071 206 941-8248 PRODUCTS FOR ThE ICCflhhtaflflEifl Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship 8 Performance NEW IMPROVED ** * * LI*lm Wst Medd wIla mare wauli Pews ITU5petenNooes * 7eW3 Oeien nvi1 yeaCORD * *WelarDry *Stick Abrasives * * A Keen Machine gives exceptional * sending control excellent finish 89 Basic nci 1 net Wand 1 eachp C 1 O8~ Soilile Special ncl 2 fiat 1 halfroved wend 5 6 gels 1 2gg Delco ncades 3 hat 2 vat roved *wands 1 beth weeds end tO oh *hgnis *Additional Wends Abrasives availablee C * WANDIT MANUFACTURING 214 2885789 * *PC Box 266 uite Texas 75149C uses its quarter-scale RC models Since plug-in system yet built flying details included would like information about work-in-progress can contacted Suite 401 1938 Peachtree Rd Atlanta GA 30309 Likewise have questions comments model presented feel free write did design building considerations work out its first com petition outing T-60 won 31st King Orange Stunt event Al Lewis Flyoff Trophy spent morning judging Old-Timer Stunt first official flight second total flight day first several hours believe testimony easy handling ac curate flying characteristics design pos sesses T-60 other important events remains seen thing sure though Im glad Ijomed em Im glad let Phoenix live new life larger bird CI Aerobatics/Fancher Continued page 70 hinge almost mandatory since can installedand fact should afterthe model covered Lets make perfectly clear surfaces hinged should slotted accept hinges prior covering Apply covering next seal right over hinge slots slots reopened sharp razor knife should hinges installed installing bellcrank two things very important First sure installation perfectly sound platform must rigidly supported properly glued using either epoxy aliphatic-resin glue bellcrank bolt should firmly tightened nut installed epoxy prevent loosening solder washers nylontype bellcranks pushrod retainers heat may melt nylon disrupt smooth control action use Y32-in Du-Bro wheel collars setscrews firmly tightened epoxied place Second sure flap end pushrod directly line inch above flap hinge line bellcrank neutral will allow proper alignment flap horn thus ensure whole control system will neutral simultaneously shaping sheet balsa flaps tail surfaces use rounded cross section shown plans Dont try taper too thin will unacceptably weakened Now time cut slots hinges Dont attempt get narrow gap between hinged surfaces what usually happens controls end up rubbing depriving both freedom range control movement Just leave natural gap results rounded pinned section hinge Shaping profile fuselage pain neck plywood doublers dont take well carving planing sanding shape seems imposing task Try way Assemble balsa profile fuselage hardwood engine mounts plywood doublers board -in thicker balsa tripler discussed last month Blend square rear edge ply doubler balsa fuse using piece scrap -in balsa already sanded triangular section Now comes tough part shaping front end Believe going sand sucker shape First clamp fuse work bench nose sticks out midair Use either large C-clamp some scrap hardwood protect balsa fuse pile old Model Aviation mags protect against snap ping fuse half shape place piece scrap hardwood under fuse support nose piece one-by-two about three feet long good Now using 2 x 12-in strip coarse 40-grit sandpaper attack side nose though buffing pair shoes As use buffing motion move fore aft removing material uniformly Youll surprised fast can shape front end plywood Now hard part done carve aft fuse pleasant shape using razor plane sandpaper Dont overly taper toward tail doing will weaken area allow tail flex flight Prior final shaping area permanently attach rudder has good solid joint fuselage can faired smoothly Although previous use iron-on coverings limited Top Flites MonoKote chose try Sigs new Supercoat material very pleased its performance activated much lower temperature somewhat Continued page 155 152 Model Aviation GREAT LAKES TRAINER T21A SPAN 64 115 SCALE SEND $200 FOR COMPLETE CATALOG OF FINE KITS 4 N@RTNEA8T AERODWEANICS Inc_______ aic L1BANONSTRET ORO MAINE 04073 517-460-IUl PERIOR DESIGN ORAFTSMANSHIPThe Finest Kits Youll Ever Buy Build Train-Air 20 Train-Air 40 Sport-Air 40 Bel-Air 40 40 Hydro-Floats EEL7A7IiO. Ths need easy handling superior serobatlc modern looking sport exhIbition biplane has filfed 5664k AS kit parta biplane tin line at- kita machine cut assist buIlding reaf ahow Sal-AIr 60 has fully sunimetrical wing sections ThIs gives greatest potential aerobatic panormance either upright inverted ship capable very slow close-in type flight right up rlgoroua aerobatic schedule can muster SPEC IFICATIONS ktgine Requirementany 60Fuesiage Width35 Wiep Span52WeIght RengeB 75 lbs WIng Area955 0Wing Loading Range14810 185 Fuselage Length46 207-490-1661 VIas Mastercard Accepted
Edition: Model Aviation - 1987/09
Page Numbers: 66, 67, 68, 69, 150, 152
mm m m rnw wwWW inin in — ww U wU w w modern-day adaptation Control Line Stunt fly ings earlier designs pleasing elliptical wings produces good looking model winning potential equal its rich heritage ETom Dixon IF YOU CANT BEAT emjoin emor saying goes Well join em Stunter After years pref erence 35-size planes am forced concede larger powerful model necessary competitive national level Although am entirely convinced yet larger model flies substantially better Ive come ad mit image presents current requirement play game suc cess Once Id decided move larger plane looked around what others doing New Jersey-New York area group flying SuperTigre-60-powered models widely varying sizes ranging Windy Urtnowskis huge Sweepers Glen Meadors Eagle latter being hardly larger models flying Fox 35s Atlanta Scott Bair has flying super-light semiscale models ST 60 two years now own homemade engines Frank Williams using ST 60 Profile Surrounded variety no consensus what might best opted simply enlarge Phoenixa revision Palmer Thunderbirdby multiplying linear dimensions 110% airfoils curved surfaces enlarged reproducing enlarging photocopy machine Along way too decided modernize look plane straightening out fuselage lines using bubble-type canopy Also landing gear moved farther out wing angled inward current style Wheel position moved slightly rearward better landings No changes made aerodynamics design result modifications hoped would Thunderbird 60 capable making better presentation judges still retaining excellent easy handling qualities smaller Phoe nix emerged engine tank control systems airplane size brand-new ground did like idea drilling conventional spraybar hole crank case hundred-dollar engine Also Scott Bairs work true venturi com monly referred sprinkler systems convinced better way venturi turned -in Delrin rod fit retained spraybar manner old G-21 ST 46 Control Line engine major difference stock Tigre-type venturi use fuel inlet hole done prevent engine occasionally getting air bubbles delivery system can lead erratic runs Final venturi size 182 ID may need varied plane flown hotter weather high altitude muffler used T-60 SST unit eight No 43 size holes open results very quiet presentation sacrificing power fact weight drag carrying engine under-stressed remains con stant four-cycle setting until four-leaf 66 Model Aviation clover momentarily burps two-cycle Using large prop also keeps noise down decreasing rpm Currently am using Top Flite 14-6 thinned about 50% blade thickness engine capable turning prop would necessitate longer landing gear belief almost current Stunters could benefit prop diameter people use high static thrust big prop gives better vertical pull line tension large disc area prevents model running away going downhill look full-scale aerobatic aircraft will confirm point have huge props fuel tank designed manufactured Doug Taffinder Thick ness chosen align fuel feed line spraybar tank resting motor mounts basically guess no experience tank should aligned 60 turned out fine exactly equal upright inverted lap times first flight onwards Length width tank chosen fit space available nose 1 x 2 x 6-in tank has volume between 7 7 oz ade quate AMA Pattern time limits Ac tually measure fuel tank am using 6 oz Doug Taflinder has tanks available special-order basis has dubbed Dixie 60 Write him details Carolina-TaWmder 8345 Delhi Rd North Charleston SC 29418 Phone 803/553-7169 cheap because handmade beautifully done well worth advantage Dixie 60 tank its mounting canted outwards rear ensures solid fuel feed throughout flight until uniflow vent uncovers just before fuel gone straight mounting can result occasional air bub bles toward end run can also result unused fuel attendant weight CG change problems Line length begun 69 ft center handlethe maximum allow able length AMA FAI rules No change has found necessary lines 018 cable 14-6 prop ground rpm setting 7300 gives fairly slow 55 56 seconds per lap solid tension maneuvers very windy conditions prop can changed 145 run 7800 rpm gives slightly constant speed defense against windupbut expense higher noise level necessity adjusting fuel volume maintain length run generally stay 14-6 control system uses conventional Top Flite three-inch nylon bellcrank X-cell /32 wire horns After experimenting making some -in wire horns felt just necessary Instead X-cell horn wires cut off re-bent short practical increase tor sion resistance recommend using flap horn length much over 3 September1987 67 Overall Views autnor says no startea OUT TO give ne juages wnu iney weni iu see scaled up original Phoenix Stunter larger 60-size model shown after just couple flights sold stable model its super Stunt flying qualities Larger diameter props 14 x 6 produce resistance down-maneuver speed increase lower revving also results less noise generation Since photo taken author says hes switched Merco 61 engine 3- 4-blade carbon fiber props have same effect large props provide better ground clearance elevator horn length over 2 model size unless horn wires m material belicrank mounted backwards effect precession P Factor anything else currently con troversial Rather done practical matter keep pushrod flaps straight possible clear center ribs keep wire bends toward outside circle order reduce load retaining washers major departure adapting Thunderbird take cue Stan Powell reduce sensitivity control system closest inside hole bellcrank used drive flap pushrod receiving hole flap horn inch hinge line flaps results very smooth system allows small inputs jerkiness using four-inch spacing handle reflexes similar almost im possible bounce corner over-con trolling model like quicker responses larger handle can always used HOLLOWED BALSAIIH BALSA5516 SQ BALSA BLOCS TOE N BOSTONSHEETINGLEADING EASE AO ISETABLE~Tf2I74 LEADOOTS 4I IH HALA OH BALSA SBEET BALSB Il6BAFSA VERY SAN WEBS IsV BALSA 55 BAA Sir CORE SE EL SE NOTCH 35 Ba LA SE OAF5 ECIASYFEAL HINGE SOSAFLOCOTION SAP BOCB THIS 5005 0A ST NATS RIB ESH ASTO FINA IS AlE SICK HIRE R-I STAT 651 LANDING GEARA15 EALSS HEFS STABILIZER RIGHT SIDE GOB A2SS BALSA CEA 15 BALSA ITRISCr SAL -iITI1~ -Z0~SHEET l~] ~4ThEN 0d 025AR5 BALSA01 0-CELL HORN SHORTEN TO 0ISO 515A BALSA SHEET ELEVATOR ISA BALSAO2 SHEETHINGE LOCATIONI Lead-outs receive special attention cause anticipated increase flight loads Brass-plated 027-in cable Perfect Co inserted soft brass tubing 2 ID bent teardrop shape bellcrank line attachment point tubing allows smooth bearing surface bellcrank spreads load cable also looks Pro Stunt Note Sullivan C-D lead-out cable too large fit 2 ID tubing discussing controls seems time ly talk some about trimming Stunters thing will notice build T 60 because its equal-panel wings lot tip weight necessary have weighed total ballast Id guess close three ounces Under FAI rules lighter lines may used case tip weight could less find tip weight gives effective line tension nonequal wings Besides semi-elliptical wing looks odd dif ficult build panel longer other T-60 tends build nose-heavy anticipation problem machined excess weight off spare cylinder head also built hatch add tail weight As turned out no tail weight needed 7A-oz lighter machined head neces 68 Model Aviation hatch rearwas included additional tail weightcould added getthe proper CG However after machining away part cylinder head no tall weight needed Small hatch outboard wing tip bot tom makes easy vary tip weight nec essaryto trim model non-symmetrical wing could have used building seml-ellptical wing panel longer other difficult also would look odd Becky Dixon shows off Thunderbird inspired paint scheme wide-stance landing gearon husbandTomsbigStunter Usingamodifled Byrons plug-inwing joiner allows large-span model fit smallest compact carsalso simplifies construction wing maintenance Only eight holes muffler help keep things quiet Note machined cylinder head modification stock venturi SuperTigre text has details Full-Size Plans Available. See Page 170 116 PLY RIB 1216 BALSA SHEETING128 RB BALSAPLY BELLERANK MOUNTNOR SO BALSA DOUBLERTRIM RIBS 10 FIT-LEON SDOUBLERFIT BETWEEN FUSE S BES NO EDGE OWER BALSA BLUER -- -r- r - Th1 LT ao INS 2 zL 128 BALSA IL __- __ __-__—__ 16 PETINI hi ISGEGOCRMAPLE1SOUBLER OP EW -II -IWIGANESBEEI LITEERMO 1216 BALSI IIII IflR52IRCENTER SROBIII BALSA C STRIPSSHEETING J7IiI IilliIIVRBALSAI IIII[III IIUSHEOBALAELOTHI K-11LW BALSA NEH-SHEET TIP H-N-NH-SH-A ___________---___LW H-HH-U -II ROTE OSE WING TIP WEIGHT ~-7~OH BOILD TIP FROM SOLID 31-lUG NALSA SHEET II -SUB UUU6E GRAIN -WALSA FLAPS 3232 BALSA 0-CELL HOWS-REBENO TO U SATURATE HORN HOLES RITR HINGE TD SalT THIN CYG TO STHENGTGEN 8006 1IjFA 04 247 WINO SPAR UOGTENINO NOTE IRREGULAR PH MEDIUM2 52H APLE MOTOR BOUNTS TOP SlEW- ONE RIGHT -ONE LEFT 0H HR BALSA 3232 bALSA SHEET N-IS 3232 BALSA UGEET N-Il N-IS 3216 BALSA SHEET 1232 PLO DOUBLERS 32I6 BALSA N-b 3230 BALSA HEET 12C ARBON FIBER REINFORCEMENT ADO TOP STRIPS BEFORE PLT NOSE DOUHLEH IS GORED HOTTOM STRIPS ARE GLUED AFTEG I WING IS INSTALLER FIN RUD 3216 BALSA SCRAF SHEETFILLSTAG UOulT / CANUFT IS II RIG WAIL 06 HOLLOWED I22 BALSA SHEET TO H-lU HOI BALSA BLUER TOP R-IIR-IZ NHOLLOW TO SUIT ITOLO-ALL MOTOR MOUNT OFFOCT ENGINEARROW SHAFT FUSELAGE SIDE VIEW B r-5AIR VENT TAFFINRER BIOIE 60 FUEL TANR INS- jZR021 Vk/32U2B0LS1 PLY BAFFLEc -32 BE 500 ILRLDGDREEI - IA~BLOS COWL _ NPLY28BALSAIBEROLASSNH SOROWICIIEO ART 22 BALSA BLOCKFUSE ORESPUSHROO WITHTWO 00 PLO N MAFLE ROlEMOTALUROTTOB HOLLOWER3232 MW ENOENS SLVO AIMGO2RPLHIIII1ZIOIUOI12080 SHEETIIIIA]HALOAI/j OAILHHIEEL H NWWHEELS12B BALSAiVh4f12P% 122I DIA BARNESMODEL AVIATION NOSE RING20A J0E2- F4A__THUNDERBIRD 60 LTEPSF 6CONTROL LINE PRECISION AIROBATIC ____ ESIGNED BY IOU DIXON TRACING BY OE DEMARCO sary balance plane model have built 20 years did have some tail weightor usually nose weightto bring trim might mention too during construction spinner backplate prop nut also machined down reduce nose heaviness lightness its extremities major factor planes ability groove proper CG Stunter heavy tail heavy nose both harder turn harder stop turning due mass operating long moment arm Too-heavy wing tips produces same effect roll axis Minor gusts make airplane bounce major advantage elliptical-type wings like T 60 tips build up light because much less wood extremities Think about next time consider building foam wing block tips extremely helpful novice have expert flier help trim plane expert can quickly figure out lead-outs need placed trim weight may needed whether flaps elevators need tweaked dial model in Atlanta find flying anothers ships brings twofold benefits flier gets anothers opinion what needed observer viewing plane outside circle can see things pilot cannot view well such flying wing slightly high low believe well worth traveling several hundred miles get together someone can help trim new plane rather struggle alone companionship worth too Flying Hand-Launched Gliders inci dentally has big payoff helping develop feel trim general Nothing else know can teach much price time involved Although learn way HLG directly applicable Control Line just may develop another good hobby get some exercise youre Free Flighters pretty good people too Construction Only unusual aspects construction will highlighted basic sequences same Phoenix Smoother articles MA Feb 1984 March 1985 respectively also assumed builders first scratch-built model cer tainly dont recommend such Wing Please note double leading edge planking center ribs added precaution against rough handling pulltesting lesser degree possible folding wing Remember trim ribs accordingly before assembling ternal wing structure difficult accurately once jig did learn rear center section can dou bled too have doubts about wings integrity Mine has held up fine 25-mph winds doubled rear planking have heard T-60 built early plans wing folded Since have talked builder however know hollowed things better left solid deviated plans some other way might explain buckling Also note webbing trailing edge essential MonoKote tissue covering used prevents flaps inducing twist wing reaction flaps being deflected Grain direction should vertical webbing fits should tight forced Spar material should super-light 4-lb balsa Medium-weight wood better Trailing edge sheeting should quarter-grain speckled-appearing wood both stiffness resistance against over-thinning shaping trailing edge capContinued page 150 September1987 69 race flexible push rod serves servo best nothing beats Gold-N-Rod Sullivan Products Because Gold-N-Rods unique design allows lowest friction accurate transfer motion around curves push rod market Heres Exclusive spline design dramatically reduces friction between inner outer rod Sullivans demanding quality control insures tight fit minimal play between inner outer rods Gold-N-Rods special temperature-resistant resins help keep model trim comes convenient applications Gold-N-Rod soars above competition Youll find installation snap adjustments easier using Gold-N-Rods complete kit push rods studs Gold-N-Clevises So dont get thrown curve Instead go gold Gold-N-Rod Sullivan return welcomed valuable contributions future articles Please con tact directly James J Noonan 7454 West Thurston Circle Milwaukee WI 53218 T-60/Dixon Continued page 69 Weight can readily saved hol lowing out spar within about /4 ribs sheeting after wing fully constructed hollow inboard landing gear locations Ribs should also hollowed leave bar vertically about halfway between spar trailing edge guard against covering shrink age flattening airfoil curvature Light5fP7oDroR PRODUC OeeNonhHa nO p Bo66 Bn 66022243000 0.JZ .k.d p. Made n ening holes should also cut nose sections ribs before sheeting grind away back leading edge strip using Robart sanding drum Dremel tool triangle shape left between ribs Fuselage Note 007-in carbon fiber strip reinforcing shown plans greatly augments fuselages resistance bending under air loads adding almost no weight also very important accurately shape wing cutouts perform wing-to-fuselage assembly parts inverted flat surface avoid bending fuselage crutch out alignment during assembly top crutch must remain straight line after wing installed avoid building unwanted incidence tail wheel mount much easier stronger method traditional copper wire lacing Simply place oversized 1/16 ply mount blanks vise drill between /16 drill make groove wire Sandwich tail gear wire between two ply pieces using thick CyA glue join Add maple anchor protruding end wire resist twisting trim whole assembly fit rear fuselage takes longer describe Moving other end take pains keep cowl very light Hollow out much possible coat inside nose cowl Hobby Poxy Formula 2 glue strength fuel resistance heated after application heat gun excess merely poured out heat thins glue soaks ac celerating cure-time Covering out side cowl silkspan helps finishing adds some strength Some people advocate covering nose glass cloth have found necessary canopy shown plans built up sheet balsa origlnal model used cut-down Sig 11-in WW II canopy softened distorted slightly during painting As result future models will have wood possibly fiberglass canopy Ex-Atlantan Lou Melancon avoid ed whole problem T-60 simulating canopy nose section much like Stan Powells Dove Lous plane finished MonoKote came out 4 oz lighter 53 oz also used Sig Chipmunk wheel pants distinctive touch Finishing choice finishing discretion builder model covered Sig Light Flite Plyspan tissue finished Sig nitrate butyrate Lite Coat dope rubbed out using progressively finer grades steel wool polished Dupont white compound waxed As mentioned Lou Melancon MonoKoted plane ex cellent results tip shape prevents usual problems covering wing tips MonoKote Take choice business family pressures am leaning more towards iron-on coverings timesaving ad vantages Further developments next gener ation T-60s will have two-piece plug-in wing removable tail surfaces twin enthusiasms large planes small automobiles forcing move another great advantage ease finishing maintenance individual components Easier storage shipping distant contest sites also pluses Europeans have building way years Well hint adapt plug-in system Byron Originals Continued page 152 150 Model Aviation push comes shove Sullivans Gold-N-Rod smoothest around curves IKON NWST PO Box 566 Dept AM Auburn WA 98071 206 941-8248 PRODUCTS FOR ThE ICCflhhtaflflEifl Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship 8 Performance NEW IMPROVED ** * * LI*lm Wst Medd wIla mare wauli Pews ITU5petenNooes * 7eW3 Oeien nvi1 yeaCORD * *WelarDry *Stick Abrasives * * A Keen Machine gives exceptional * sending control excellent finish 89 Basic nci 1 net Wand 1 eachp C 1 O8~ Soilile Special ncl 2 fiat 1 halfroved wend 5 6 gels 1 2gg Delco ncades 3 hat 2 vat roved *wands 1 beth weeds end tO oh *hgnis *Additional Wends Abrasives availablee C * WANDIT MANUFACTURING 214 2885789 * *PC Box 266 uite Texas 75149C uses its quarter-scale RC models Since plug-in system yet built flying details included would like information about work-in-progress can contacted Suite 401 1938 Peachtree Rd Atlanta GA 30309 Likewise have questions comments model presented feel free write did design building considerations work out its first com petition outing T-60 won 31st King Orange Stunt event Al Lewis Flyoff Trophy spent morning judging Old-Timer Stunt first official flight second total flight day first several hours believe testimony easy handling ac curate flying characteristics design pos sesses T-60 other important events remains seen thing sure though Im glad Ijomed em Im glad let Phoenix live new life larger bird CI Aerobatics/Fancher Continued page 70 hinge almost mandatory since can installedand fact should afterthe model covered Lets make perfectly clear surfaces hinged should slotted accept hinges prior covering Apply covering next seal right over hinge slots slots reopened sharp razor knife should hinges installed installing bellcrank two things very important First sure installation perfectly sound platform must rigidly supported properly glued using either epoxy aliphatic-resin glue bellcrank bolt should firmly tightened nut installed epoxy prevent loosening solder washers nylontype bellcranks pushrod retainers heat may melt nylon disrupt smooth control action use Y32-in Du-Bro wheel collars setscrews firmly tightened epoxied place Second sure flap end pushrod directly line inch above flap hinge line bellcrank neutral will allow proper alignment flap horn thus ensure whole control system will neutral simultaneously shaping sheet balsa flaps tail surfaces use rounded cross section shown plans Dont try taper too thin will unacceptably weakened Now time cut slots hinges Dont attempt get narrow gap between hinged surfaces what usually happens controls end up rubbing depriving both freedom range control movement Just leave natural gap results rounded pinned section hinge Shaping profile fuselage pain neck plywood doublers dont take well carving planing sanding shape seems imposing task Try way Assemble balsa profile fuselage hardwood engine mounts plywood doublers board -in thicker balsa tripler discussed last month Blend square rear edge ply doubler balsa fuse using piece scrap -in balsa already sanded triangular section Now comes tough part shaping front end Believe going sand sucker shape First clamp fuse work bench nose sticks out midair Use either large C-clamp some scrap hardwood protect balsa fuse pile old Model Aviation mags protect against snap ping fuse half shape place piece scrap hardwood under fuse support nose piece one-by-two about three feet long good Now using 2 x 12-in strip coarse 40-grit sandpaper attack side nose though buffing pair shoes As use buffing motion move fore aft removing material uniformly Youll surprised fast can shape front end plywood Now hard part done carve aft fuse pleasant shape using razor plane sandpaper Dont overly taper toward tail doing will weaken area allow tail flex flight Prior final shaping area permanently attach rudder has good solid joint fuselage can faired smoothly Although previous use iron-on coverings limited Top Flites MonoKote chose try Sigs new Supercoat material very pleased its performance activated much lower temperature somewhat Continued page 155 152 Model Aviation GREAT LAKES TRAINER T21A SPAN 64 115 SCALE SEND $200 FOR COMPLETE CATALOG OF FINE KITS 4 N@RTNEA8T AERODWEANICS Inc_______ aic L1BANONSTRET ORO MAINE 04073 517-460-IUl PERIOR DESIGN ORAFTSMANSHIPThe Finest Kits Youll Ever Buy Build Train-Air 20 Train-Air 40 Sport-Air 40 Bel-Air 40 40 Hydro-Floats EEL7A7IiO. Ths need easy handling superior serobatlc modern looking sport exhIbition biplane has filfed 5664k AS kit parta biplane tin line at- kita machine cut assist buIlding reaf ahow Sal-AIr 60 has fully sunimetrical wing sections ThIs gives greatest potential aerobatic panormance either upright inverted ship capable very slow close-in type flight right up rlgoroua aerobatic schedule can muster SPEC IFICATIONS ktgine Requirementany 60Fuesiage Width35 Wiep Span52WeIght RengeB 75 lbs WIng Area955 0Wing Loading Range14810 185 Fuselage Length46 207-490-1661 VIas Mastercard Accepted
Edition: Model Aviation - 1987/09
Page Numbers: 66, 67, 68, 69, 150, 152
mm m m rnw wwWW inin in — ww U wU w w modern-day adaptation Control Line Stunt fly ings earlier designs pleasing elliptical wings produces good looking model winning potential equal its rich heritage ETom Dixon IF YOU CANT BEAT emjoin emor saying goes Well join em Stunter After years pref erence 35-size planes am forced concede larger powerful model necessary competitive national level Although am entirely convinced yet larger model flies substantially better Ive come ad mit image presents current requirement play game suc cess Once Id decided move larger plane looked around what others doing New Jersey-New York area group flying SuperTigre-60-powered models widely varying sizes ranging Windy Urtnowskis huge Sweepers Glen Meadors Eagle latter being hardly larger models flying Fox 35s Atlanta Scott Bair has flying super-light semiscale models ST 60 two years now own homemade engines Frank Williams using ST 60 Profile Surrounded variety no consensus what might best opted simply enlarge Phoenixa revision Palmer Thunderbirdby multiplying linear dimensions 110% airfoils curved surfaces enlarged reproducing enlarging photocopy machine Along way too decided modernize look plane straightening out fuselage lines using bubble-type canopy Also landing gear moved farther out wing angled inward current style Wheel position moved slightly rearward better landings No changes made aerodynamics design result modifications hoped would Thunderbird 60 capable making better presentation judges still retaining excellent easy handling qualities smaller Phoe nix emerged engine tank control systems airplane size brand-new ground did like idea drilling conventional spraybar hole crank case hundred-dollar engine Also Scott Bairs work true venturi com monly referred sprinkler systems convinced better way venturi turned -in Delrin rod fit retained spraybar manner old G-21 ST 46 Control Line engine major difference stock Tigre-type venturi use fuel inlet hole done prevent engine occasionally getting air bubbles delivery system can lead erratic runs Final venturi size 182 ID may need varied plane flown hotter weather high altitude muffler used T-60 SST unit eight No 43 size holes open results very quiet presentation sacrificing power fact weight drag carrying engine under-stressed remains con stant four-cycle setting until four-leaf 66 Model Aviation clover momentarily burps two-cycle Using large prop also keeps noise down decreasing rpm Currently am using Top Flite 14-6 thinned about 50% blade thickness engine capable turning prop would necessitate longer landing gear belief almost current Stunters could benefit prop diameter people use high static thrust big prop gives better vertical pull line tension large disc area prevents model running away going downhill look full-scale aerobatic aircraft will confirm point have huge props fuel tank designed manufactured Doug Taffinder Thick ness chosen align fuel feed line spraybar tank resting motor mounts basically guess no experience tank should aligned 60 turned out fine exactly equal upright inverted lap times first flight onwards Length width tank chosen fit space available nose 1 x 2 x 6-in tank has volume between 7 7 oz ade quate AMA Pattern time limits Ac tually measure fuel tank am using 6 oz Doug Taflinder has tanks available special-order basis has dubbed Dixie 60 Write him details Carolina-TaWmder 8345 Delhi Rd North Charleston SC 29418 Phone 803/553-7169 cheap because handmade beautifully done well worth advantage Dixie 60 tank its mounting canted outwards rear ensures solid fuel feed throughout flight until uniflow vent uncovers just before fuel gone straight mounting can result occasional air bub bles toward end run can also result unused fuel attendant weight CG change problems Line length begun 69 ft center handlethe maximum allow able length AMA FAI rules No change has found necessary lines 018 cable 14-6 prop ground rpm setting 7300 gives fairly slow 55 56 seconds per lap solid tension maneuvers very windy conditions prop can changed 145 run 7800 rpm gives slightly constant speed defense against windupbut expense higher noise level necessity adjusting fuel volume maintain length run generally stay 14-6 control system uses conventional Top Flite three-inch nylon bellcrank X-cell /32 wire horns After experimenting making some -in wire horns felt just necessary Instead X-cell horn wires cut off re-bent short practical increase tor sion resistance recommend using flap horn length much over 3 September1987 67 Overall Views autnor says no startea OUT TO give ne juages wnu iney weni iu see scaled up original Phoenix Stunter larger 60-size model shown after just couple flights sold stable model its super Stunt flying qualities Larger diameter props 14 x 6 produce resistance down-maneuver speed increase lower revving also results less noise generation Since photo taken author says hes switched Merco 61 engine 3- 4-blade carbon fiber props have same effect large props provide better ground clearance elevator horn length over 2 model size unless horn wires m material belicrank mounted backwards effect precession P Factor anything else currently con troversial Rather done practical matter keep pushrod flaps straight possible clear center ribs keep wire bends toward outside circle order reduce load retaining washers major departure adapting Thunderbird take cue Stan Powell reduce sensitivity control system closest inside hole bellcrank used drive flap pushrod receiving hole flap horn inch hinge line flaps results very smooth system allows small inputs jerkiness using four-inch spacing handle reflexes similar almost im possible bounce corner over-con trolling model like quicker responses larger handle can always used HOLLOWED BALSAIIH BALSA5516 SQ BALSA BLOCS TOE N BOSTONSHEETINGLEADING EASE AO ISETABLE~Tf2I74 LEADOOTS 4I IH HALA OH BALSA SBEET BALSB Il6BAFSA VERY SAN WEBS IsV BALSA 55 BAA Sir CORE SE EL SE NOTCH 35 Ba LA SE OAF5 ECIASYFEAL HINGE SOSAFLOCOTION SAP BOCB THIS 5005 0A ST NATS RIB ESH ASTO FINA IS AlE SICK HIRE R-I STAT 651 LANDING GEARA15 EALSS HEFS STABILIZER RIGHT SIDE GOB A2SS BALSA CEA 15 BALSA ITRISCr SAL -iITI1~ -Z0~SHEET l~] ~4ThEN 0d 025AR5 BALSA01 0-CELL HORN SHORTEN TO 0ISO 515A BALSA SHEET ELEVATOR ISA BALSAO2 SHEETHINGE LOCATIONI Lead-outs receive special attention cause anticipated increase flight loads Brass-plated 027-in cable Perfect Co inserted soft brass tubing 2 ID bent teardrop shape bellcrank line attachment point tubing allows smooth bearing surface bellcrank spreads load cable also looks Pro Stunt Note Sullivan C-D lead-out cable too large fit 2 ID tubing discussing controls seems time ly talk some about trimming Stunters thing will notice build T 60 because its equal-panel wings lot tip weight necessary have weighed total ballast Id guess close three ounces Under FAI rules lighter lines may used case tip weight could less find tip weight gives effective line tension nonequal wings Besides semi-elliptical wing looks odd dif ficult build panel longer other T-60 tends build nose-heavy anticipation problem machined excess weight off spare cylinder head also built hatch add tail weight As turned out no tail weight needed 7A-oz lighter machined head neces 68 Model Aviation hatch rearwas included additional tail weightcould added getthe proper CG However after machining away part cylinder head no tall weight needed Small hatch outboard wing tip bot tom makes easy vary tip weight nec essaryto trim model non-symmetrical wing could have used building seml-ellptical wing panel longer other difficult also would look odd Becky Dixon shows off Thunderbird inspired paint scheme wide-stance landing gearon husbandTomsbigStunter Usingamodifled Byrons plug-inwing joiner allows large-span model fit smallest compact carsalso simplifies construction wing maintenance Only eight holes muffler help keep things quiet Note machined cylinder head modification stock venturi SuperTigre text has details Full-Size Plans Available. See Page 170 116 PLY RIB 1216 BALSA SHEETING128 RB BALSAPLY BELLERANK MOUNTNOR SO BALSA DOUBLERTRIM RIBS 10 FIT-LEON SDOUBLERFIT BETWEEN FUSE S BES NO EDGE OWER BALSA BLUER -- -r- r - Th1 LT ao INS 2 zL 128 BALSA IL __- __ __-__—__ 16 PETINI hi ISGEGOCRMAPLE1SOUBLER OP EW -II -IWIGANESBEEI LITEERMO 1216 BALSI IIII IflR52IRCENTER SROBIII BALSA C STRIPSSHEETING J7IiI IilliIIVRBALSAI IIII[III IIUSHEOBALAELOTHI K-11LW BALSA NEH-SHEET TIP H-N-NH-SH-A ___________---___LW H-HH-U -II ROTE OSE WING TIP WEIGHT ~-7~OH BOILD TIP FROM SOLID 31-lUG NALSA SHEET II -SUB UUU6E GRAIN -WALSA FLAPS 3232 BALSA 0-CELL HOWS-REBENO TO U SATURATE HORN HOLES RITR HINGE TD SalT THIN CYG TO STHENGTGEN 8006 1IjFA 04 247 WINO SPAR UOGTENINO NOTE IRREGULAR PH MEDIUM2 52H APLE MOTOR BOUNTS TOP SlEW- ONE RIGHT -ONE LEFT 0H HR BALSA 3232 bALSA SHEET N-IS 3232 BALSA UGEET N-Il N-IS 3216 BALSA SHEET 1232 PLO DOUBLERS 32I6 BALSA N-b 3230 BALSA HEET 12C ARBON FIBER REINFORCEMENT ADO TOP STRIPS BEFORE PLT NOSE DOUHLEH IS GORED HOTTOM STRIPS ARE GLUED AFTEG I WING IS INSTALLER FIN RUD 3216 BALSA SCRAF SHEETFILLSTAG UOulT / CANUFT IS II RIG WAIL 06 HOLLOWED I22 BALSA SHEET TO H-lU HOI BALSA BLUER TOP R-IIR-IZ NHOLLOW TO SUIT ITOLO-ALL MOTOR MOUNT OFFOCT ENGINEARROW SHAFT FUSELAGE SIDE VIEW B r-5AIR VENT TAFFINRER BIOIE 60 FUEL TANR INS- jZR021 Vk/32U2B0LS1 PLY BAFFLEc -32 BE 500 ILRLDGDREEI - IA~BLOS COWL _ NPLY28BALSAIBEROLASSNH SOROWICIIEO ART 22 BALSA BLOCKFUSE ORESPUSHROO WITHTWO 00 PLO N MAFLE ROlEMOTALUROTTOB HOLLOWER3232 MW ENOENS SLVO AIMGO2RPLHIIII1ZIOIUOI12080 SHEETIIIIA]HALOAI/j OAILHHIEEL H NWWHEELS12B BALSAiVh4f12P% 122I DIA BARNESMODEL AVIATION NOSE RING20A J0E2- F4A__THUNDERBIRD 60 LTEPSF 6CONTROL LINE PRECISION AIROBATIC ____ ESIGNED BY IOU DIXON TRACING BY OE DEMARCO sary balance plane model have built 20 years did have some tail weightor usually nose weightto bring trim might mention too during construction spinner backplate prop nut also machined down reduce nose heaviness lightness its extremities major factor planes ability groove proper CG Stunter heavy tail heavy nose both harder turn harder stop turning due mass operating long moment arm Too-heavy wing tips produces same effect roll axis Minor gusts make airplane bounce major advantage elliptical-type wings like T 60 tips build up light because much less wood extremities Think about next time consider building foam wing block tips extremely helpful novice have expert flier help trim plane expert can quickly figure out lead-outs need placed trim weight may needed whether flaps elevators need tweaked dial model in Atlanta find flying anothers ships brings twofold benefits flier gets anothers opinion what needed observer viewing plane outside circle can see things pilot cannot view well such flying wing slightly high low believe well worth traveling several hundred miles get together someone can help trim new plane rather struggle alone companionship worth too Flying Hand-Launched Gliders inci dentally has big payoff helping develop feel trim general Nothing else know can teach much price time involved Although learn way HLG directly applicable Control Line just may develop another good hobby get some exercise youre Free Flighters pretty good people too Construction Only unusual aspects construction will highlighted basic sequences same Phoenix Smoother articles MA Feb 1984 March 1985 respectively also assumed builders first scratch-built model cer tainly dont recommend such Wing Please note double leading edge planking center ribs added precaution against rough handling pulltesting lesser degree possible folding wing Remember trim ribs accordingly before assembling ternal wing structure difficult accurately once jig did learn rear center section can dou bled too have doubts about wings integrity Mine has held up fine 25-mph winds doubled rear planking have heard T-60 built early plans wing folded Since have talked builder however know hollowed things better left solid deviated plans some other way might explain buckling Also note webbing trailing edge essential MonoKote tissue covering used prevents flaps inducing twist wing reaction flaps being deflected Grain direction should vertical webbing fits should tight forced Spar material should super-light 4-lb balsa Medium-weight wood better Trailing edge sheeting should quarter-grain speckled-appearing wood both stiffness resistance against over-thinning shaping trailing edge capContinued page 150 September1987 69 race flexible push rod serves servo best nothing beats Gold-N-Rod Sullivan Products Because Gold-N-Rods unique design allows lowest friction accurate transfer motion around curves push rod market Heres Exclusive spline design dramatically reduces friction between inner outer rod Sullivans demanding quality control insures tight fit minimal play between inner outer rods Gold-N-Rods special temperature-resistant resins help keep model trim comes convenient applications Gold-N-Rod soars above competition Youll find installation snap adjustments easier using Gold-N-Rods complete kit push rods studs Gold-N-Clevises So dont get thrown curve Instead go gold Gold-N-Rod Sullivan return welcomed valuable contributions future articles Please con tact directly James J Noonan 7454 West Thurston Circle Milwaukee WI 53218 T-60/Dixon Continued page 69 Weight can readily saved hol lowing out spar within about /4 ribs sheeting after wing fully constructed hollow inboard landing gear locations Ribs should also hollowed leave bar vertically about halfway between spar trailing edge guard against covering shrink age flattening airfoil curvature Light5fP7oDroR PRODUC OeeNonhHa nO p Bo66 Bn 66022243000 0.JZ .k.d p. Made n ening holes should also cut nose sections ribs before sheeting grind away back leading edge strip using Robart sanding drum Dremel tool triangle shape left between ribs Fuselage Note 007-in carbon fiber strip reinforcing shown plans greatly augments fuselages resistance bending under air loads adding almost no weight also very important accurately shape wing cutouts perform wing-to-fuselage assembly parts inverted flat surface avoid bending fuselage crutch out alignment during assembly top crutch must remain straight line after wing installed avoid building unwanted incidence tail wheel mount much easier stronger method traditional copper wire lacing Simply place oversized 1/16 ply mount blanks vise drill between /16 drill make groove wire Sandwich tail gear wire between two ply pieces using thick CyA glue join Add maple anchor protruding end wire resist twisting trim whole assembly fit rear fuselage takes longer describe Moving other end take pains keep cowl very light Hollow out much possible coat inside nose cowl Hobby Poxy Formula 2 glue strength fuel resistance heated after application heat gun excess merely poured out heat thins glue soaks ac celerating cure-time Covering out side cowl silkspan helps finishing adds some strength Some people advocate covering nose glass cloth have found necessary canopy shown plans built up sheet balsa origlnal model used cut-down Sig 11-in WW II canopy softened distorted slightly during painting As result future models will have wood possibly fiberglass canopy Ex-Atlantan Lou Melancon avoid ed whole problem T-60 simulating canopy nose section much like Stan Powells Dove Lous plane finished MonoKote came out 4 oz lighter 53 oz also used Sig Chipmunk wheel pants distinctive touch Finishing choice finishing discretion builder model covered Sig Light Flite Plyspan tissue finished Sig nitrate butyrate Lite Coat dope rubbed out using progressively finer grades steel wool polished Dupont white compound waxed As mentioned Lou Melancon MonoKoted plane ex cellent results tip shape prevents usual problems covering wing tips MonoKote Take choice business family pressures am leaning more towards iron-on coverings timesaving ad vantages Further developments next gener ation T-60s will have two-piece plug-in wing removable tail surfaces twin enthusiasms large planes small automobiles forcing move another great advantage ease finishing maintenance individual components Easier storage shipping distant contest sites also pluses Europeans have building way years Well hint adapt plug-in system Byron Originals Continued page 152 150 Model Aviation push comes shove Sullivans Gold-N-Rod smoothest around curves IKON NWST PO Box 566 Dept AM Auburn WA 98071 206 941-8248 PRODUCTS FOR ThE ICCflhhtaflflEifl Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship 8 Performance NEW IMPROVED ** * * LI*lm Wst Medd wIla mare wauli Pews ITU5petenNooes * 7eW3 Oeien nvi1 yeaCORD * *WelarDry *Stick Abrasives * * A Keen Machine gives exceptional * sending control excellent finish 89 Basic nci 1 net Wand 1 eachp C 1 O8~ Soilile Special ncl 2 fiat 1 halfroved wend 5 6 gels 1 2gg Delco ncades 3 hat 2 vat roved *wands 1 beth weeds end tO oh *hgnis *Additional Wends Abrasives availablee C * WANDIT MANUFACTURING 214 2885789 * *PC Box 266 uite Texas 75149C uses its quarter-scale RC models Since plug-in system yet built flying details included would like information about work-in-progress can contacted Suite 401 1938 Peachtree Rd Atlanta GA 30309 Likewise have questions comments model presented feel free write did design building considerations work out its first com petition outing T-60 won 31st King Orange Stunt event Al Lewis Flyoff Trophy spent morning judging Old-Timer Stunt first official flight second total flight day first several hours believe testimony easy handling ac curate flying characteristics design pos sesses T-60 other important events remains seen thing sure though Im glad Ijomed em Im glad let Phoenix live new life larger bird CI Aerobatics/Fancher Continued page 70 hinge almost mandatory since can installedand fact should afterthe model covered Lets make perfectly clear surfaces hinged should slotted accept hinges prior covering Apply covering next seal right over hinge slots slots reopened sharp razor knife should hinges installed installing bellcrank two things very important First sure installation perfectly sound platform must rigidly supported properly glued using either epoxy aliphatic-resin glue bellcrank bolt should firmly tightened nut installed epoxy prevent loosening solder washers nylontype bellcranks pushrod retainers heat may melt nylon disrupt smooth control action use Y32-in Du-Bro wheel collars setscrews firmly tightened epoxied place Second sure flap end pushrod directly line inch above flap hinge line bellcrank neutral will allow proper alignment flap horn thus ensure whole control system will neutral simultaneously shaping sheet balsa flaps tail surfaces use rounded cross section shown plans Dont try taper too thin will unacceptably weakened Now time cut slots hinges Dont attempt get narrow gap between hinged surfaces what usually happens controls end up rubbing depriving both freedom range control movement Just leave natural gap results rounded pinned section hinge Shaping profile fuselage pain neck plywood doublers dont take well carving planing sanding shape seems imposing task Try way Assemble balsa profile fuselage hardwood engine mounts plywood doublers board -in thicker balsa tripler discussed last month Blend square rear edge ply doubler balsa fuse using piece scrap -in balsa already sanded triangular section Now comes tough part shaping front end Believe going sand sucker shape First clamp fuse work bench nose sticks out midair Use either large C-clamp some scrap hardwood protect balsa fuse pile old Model Aviation mags protect against snap ping fuse half shape place piece scrap hardwood under fuse support nose piece one-by-two about three feet long good Now using 2 x 12-in strip coarse 40-grit sandpaper attack side nose though buffing pair shoes As use buffing motion move fore aft removing material uniformly Youll surprised fast can shape front end plywood Now hard part done carve aft fuse pleasant shape using razor plane sandpaper Dont overly taper toward tail doing will weaken area allow tail flex flight Prior final shaping area permanently attach rudder has good solid joint fuselage can faired smoothly Although previous use iron-on coverings limited Top Flites MonoKote chose try Sigs new Supercoat material very pleased its performance activated much lower temperature somewhat Continued page 155 152 Model Aviation GREAT LAKES TRAINER T21A SPAN 64 115 SCALE SEND $200 FOR COMPLETE CATALOG OF FINE KITS 4 N@RTNEA8T AERODWEANICS Inc_______ aic L1BANONSTRET ORO MAINE 04073 517-460-IUl PERIOR DESIGN ORAFTSMANSHIPThe Finest Kits Youll Ever Buy Build Train-Air 20 Train-Air 40 Sport-Air 40 Bel-Air 40 40 Hydro-Floats EEL7A7IiO. Ths need easy handling superior serobatlc modern looking sport exhIbition biplane has filfed 5664k AS kit parta biplane tin line at- kita machine cut assist buIlding reaf ahow Sal-AIr 60 has fully sunimetrical wing sections ThIs gives greatest potential aerobatic panormance either upright inverted ship capable very slow close-in type flight right up rlgoroua aerobatic schedule can muster SPEC IFICATIONS ktgine Requirementany 60Fuesiage Width35 Wiep Span52WeIght RengeB 75 lbs WIng Area955 0Wing Loading Range14810 185 Fuselage Length46 207-490-1661 VIas Mastercard Accepted
Edition: Model Aviation - 1987/09
Page Numbers: 66, 67, 68, 69, 150, 152
mm m m rnw wwWW inin in — ww U wU w w modern-day adaptation Control Line Stunt fly ings earlier designs pleasing elliptical wings produces good looking model winning potential equal its rich heritage ETom Dixon IF YOU CANT BEAT emjoin emor saying goes Well join em Stunter After years pref erence 35-size planes am forced concede larger powerful model necessary competitive national level Although am entirely convinced yet larger model flies substantially better Ive come ad mit image presents current requirement play game suc cess Once Id decided move larger plane looked around what others doing New Jersey-New York area group flying SuperTigre-60-powered models widely varying sizes ranging Windy Urtnowskis huge Sweepers Glen Meadors Eagle latter being hardly larger models flying Fox 35s Atlanta Scott Bair has flying super-light semiscale models ST 60 two years now own homemade engines Frank Williams using ST 60 Profile Surrounded variety no consensus what might best opted simply enlarge Phoenixa revision Palmer Thunderbirdby multiplying linear dimensions 110% airfoils curved surfaces enlarged reproducing enlarging photocopy machine Along way too decided modernize look plane straightening out fuselage lines using bubble-type canopy Also landing gear moved farther out wing angled inward current style Wheel position moved slightly rearward better landings No changes made aerodynamics design result modifications hoped would Thunderbird 60 capable making better presentation judges still retaining excellent easy handling qualities smaller Phoe nix emerged engine tank control systems airplane size brand-new ground did like idea drilling conventional spraybar hole crank case hundred-dollar engine Also Scott Bairs work true venturi com monly referred sprinkler systems convinced better way venturi turned -in Delrin rod fit retained spraybar manner old G-21 ST 46 Control Line engine major difference stock Tigre-type venturi use fuel inlet hole done prevent engine occasionally getting air bubbles delivery system can lead erratic runs Final venturi size 182 ID may need varied plane flown hotter weather high altitude muffler used T-60 SST unit eight No 43 size holes open results very quiet presentation sacrificing power fact weight drag carrying engine under-stressed remains con stant four-cycle setting until four-leaf 66 Model Aviation clover momentarily burps two-cycle Using large prop also keeps noise down decreasing rpm Currently am using Top Flite 14-6 thinned about 50% blade thickness engine capable turning prop would necessitate longer landing gear belief almost current Stunters could benefit prop diameter people use high static thrust big prop gives better vertical pull line tension large disc area prevents model running away going downhill look full-scale aerobatic aircraft will confirm point have huge props fuel tank designed manufactured Doug Taffinder Thick ness chosen align fuel feed line spraybar tank resting motor mounts basically guess no experience tank should aligned 60 turned out fine exactly equal upright inverted lap times first flight onwards Length width tank chosen fit space available nose 1 x 2 x 6-in tank has volume between 7 7 oz ade quate AMA Pattern time limits Ac tually measure fuel tank am using 6 oz Doug Taflinder has tanks available special-order basis has dubbed Dixie 60 Write him details Carolina-TaWmder 8345 Delhi Rd North Charleston SC 29418 Phone 803/553-7169 cheap because handmade beautifully done well worth advantage Dixie 60 tank its mounting canted outwards rear ensures solid fuel feed throughout flight until uniflow vent uncovers just before fuel gone straight mounting can result occasional air bub bles toward end run can also result unused fuel attendant weight CG change problems Line length begun 69 ft center handlethe maximum allow able length AMA FAI rules No change has found necessary lines 018 cable 14-6 prop ground rpm setting 7300 gives fairly slow 55 56 seconds per lap solid tension maneuvers very windy conditions prop can changed 145 run 7800 rpm gives slightly constant speed defense against windupbut expense higher noise level necessity adjusting fuel volume maintain length run generally stay 14-6 control system uses conventional Top Flite three-inch nylon bellcrank X-cell /32 wire horns After experimenting making some -in wire horns felt just necessary Instead X-cell horn wires cut off re-bent short practical increase tor sion resistance recommend using flap horn length much over 3 September1987 67 Overall Views autnor says no startea OUT TO give ne juages wnu iney weni iu see scaled up original Phoenix Stunter larger 60-size model shown after just couple flights sold stable model its super Stunt flying qualities Larger diameter props 14 x 6 produce resistance down-maneuver speed increase lower revving also results less noise generation Since photo taken author says hes switched Merco 61 engine 3- 4-blade carbon fiber props have same effect large props provide better ground clearance elevator horn length over 2 model size unless horn wires m material belicrank mounted backwards effect precession P Factor anything else currently con troversial Rather done practical matter keep pushrod flaps straight possible clear center ribs keep wire bends toward outside circle order reduce load retaining washers major departure adapting Thunderbird take cue Stan Powell reduce sensitivity control system closest inside hole bellcrank used drive flap pushrod receiving hole flap horn inch hinge line flaps results very smooth system allows small inputs jerkiness using four-inch spacing handle reflexes similar almost im possible bounce corner over-con trolling model like quicker responses larger handle can always used HOLLOWED BALSAIIH BALSA5516 SQ BALSA BLOCS TOE N BOSTONSHEETINGLEADING EASE AO ISETABLE~Tf2I74 LEADOOTS 4I IH HALA OH BALSA SBEET BALSB Il6BAFSA VERY SAN WEBS IsV BALSA 55 BAA Sir CORE SE EL SE NOTCH 35 Ba LA SE OAF5 ECIASYFEAL HINGE SOSAFLOCOTION SAP BOCB THIS 5005 0A ST NATS RIB ESH ASTO FINA IS AlE SICK HIRE R-I STAT 651 LANDING GEARA15 EALSS HEFS STABILIZER RIGHT SIDE GOB A2SS BALSA CEA 15 BALSA ITRISCr SAL -iITI1~ -Z0~SHEET l~] ~4ThEN 0d 025AR5 BALSA01 0-CELL HORN SHORTEN TO 0ISO 515A BALSA SHEET ELEVATOR ISA BALSAO2 SHEETHINGE LOCATIONI Lead-outs receive special attention cause anticipated increase flight loads Brass-plated 027-in cable Perfect Co inserted soft brass tubing 2 ID bent teardrop shape bellcrank line attachment point tubing allows smooth bearing surface bellcrank spreads load cable also looks Pro Stunt Note Sullivan C-D lead-out cable too large fit 2 ID tubing discussing controls seems time ly talk some about trimming Stunters thing will notice build T 60 because its equal-panel wings lot tip weight necessary have weighed total ballast Id guess close three ounces Under FAI rules lighter lines may used case tip weight could less find tip weight gives effective line tension nonequal wings Besides semi-elliptical wing looks odd dif ficult build panel longer other T-60 tends build nose-heavy anticipation problem machined excess weight off spare cylinder head also built hatch add tail weight As turned out no tail weight needed 7A-oz lighter machined head neces 68 Model Aviation hatch rearwas included additional tail weightcould added getthe proper CG However after machining away part cylinder head no tall weight needed Small hatch outboard wing tip bot tom makes easy vary tip weight nec essaryto trim model non-symmetrical wing could have used building seml-ellptical wing panel longer other difficult also would look odd Becky Dixon shows off Thunderbird inspired paint scheme wide-stance landing gearon husbandTomsbigStunter Usingamodifled Byrons plug-inwing joiner allows large-span model fit smallest compact carsalso simplifies construction wing maintenance Only eight holes muffler help keep things quiet Note machined cylinder head modification stock venturi SuperTigre text has details Full-Size Plans Available. See Page 170 116 PLY RIB 1216 BALSA SHEETING128 RB BALSAPLY BELLERANK MOUNTNOR SO BALSA DOUBLERTRIM RIBS 10 FIT-LEON SDOUBLERFIT BETWEEN FUSE S BES NO EDGE OWER BALSA BLUER -- -r- r - Th1 LT ao INS 2 zL 128 BALSA IL __- __ __-__—__ 16 PETINI hi ISGEGOCRMAPLE1SOUBLER OP EW -II -IWIGANESBEEI LITEERMO 1216 BALSI IIII IflR52IRCENTER SROBIII BALSA C STRIPSSHEETING J7IiI IilliIIVRBALSAI IIII[III IIUSHEOBALAELOTHI K-11LW BALSA NEH-SHEET TIP H-N-NH-SH-A ___________---___LW H-HH-U -II ROTE OSE WING TIP WEIGHT ~-7~OH BOILD TIP FROM SOLID 31-lUG NALSA SHEET II -SUB UUU6E GRAIN -WALSA FLAPS 3232 BALSA 0-CELL HOWS-REBENO TO U SATURATE HORN HOLES RITR HINGE TD SalT THIN CYG TO STHENGTGEN 8006 1IjFA 04 247 WINO SPAR UOGTENINO NOTE IRREGULAR PH MEDIUM2 52H APLE MOTOR BOUNTS TOP SlEW- ONE RIGHT -ONE LEFT 0H HR BALSA 3232 bALSA SHEET N-IS 3232 BALSA UGEET N-Il N-IS 3216 BALSA SHEET 1232 PLO DOUBLERS 32I6 BALSA N-b 3230 BALSA HEET 12C ARBON FIBER REINFORCEMENT ADO TOP STRIPS BEFORE PLT NOSE DOUHLEH IS GORED HOTTOM STRIPS ARE GLUED AFTEG I WING IS INSTALLER FIN RUD 3216 BALSA SCRAF SHEETFILLSTAG UOulT / CANUFT IS II RIG WAIL 06 HOLLOWED I22 BALSA SHEET TO H-lU HOI BALSA BLUER TOP R-IIR-IZ NHOLLOW TO SUIT ITOLO-ALL MOTOR MOUNT OFFOCT ENGINEARROW SHAFT FUSELAGE SIDE VIEW B r-5AIR VENT TAFFINRER BIOIE 60 FUEL TANR INS- jZR021 Vk/32U2B0LS1 PLY BAFFLEc -32 BE 500 ILRLDGDREEI - IA~BLOS COWL _ NPLY28BALSAIBEROLASSNH SOROWICIIEO ART 22 BALSA BLOCKFUSE ORESPUSHROO WITHTWO 00 PLO N MAFLE ROlEMOTALUROTTOB HOLLOWER3232 MW ENOENS SLVO AIMGO2RPLHIIII1ZIOIUOI12080 SHEETIIIIA]HALOAI/j OAILHHIEEL H NWWHEELS12B BALSAiVh4f12P% 122I DIA BARNESMODEL AVIATION NOSE RING20A J0E2- F4A__THUNDERBIRD 60 LTEPSF 6CONTROL LINE PRECISION AIROBATIC ____ ESIGNED BY IOU DIXON TRACING BY OE DEMARCO sary balance plane model have built 20 years did have some tail weightor usually nose weightto bring trim might mention too during construction spinner backplate prop nut also machined down reduce nose heaviness lightness its extremities major factor planes ability groove proper CG Stunter heavy tail heavy nose both harder turn harder stop turning due mass operating long moment arm Too-heavy wing tips produces same effect roll axis Minor gusts make airplane bounce major advantage elliptical-type wings like T 60 tips build up light because much less wood extremities Think about next time consider building foam wing block tips extremely helpful novice have expert flier help trim plane expert can quickly figure out lead-outs need placed trim weight may needed whether flaps elevators need tweaked dial model in Atlanta find flying anothers ships brings twofold benefits flier gets anothers opinion what needed observer viewing plane outside circle can see things pilot cannot view well such flying wing slightly high low believe well worth traveling several hundred miles get together someone can help trim new plane rather struggle alone companionship worth too Flying Hand-Launched Gliders inci dentally has big payoff helping develop feel trim general Nothing else know can teach much price time involved Although learn way HLG directly applicable Control Line just may develop another good hobby get some exercise youre Free Flighters pretty good people too Construction Only unusual aspects construction will highlighted basic sequences same Phoenix Smoother articles MA Feb 1984 March 1985 respectively also assumed builders first scratch-built model cer tainly dont recommend such Wing Please note double leading edge planking center ribs added precaution against rough handling pulltesting lesser degree possible folding wing Remember trim ribs accordingly before assembling ternal wing structure difficult accurately once jig did learn rear center section can dou bled too have doubts about wings integrity Mine has held up fine 25-mph winds doubled rear planking have heard T-60 built early plans wing folded Since have talked builder however know hollowed things better left solid deviated plans some other way might explain buckling Also note webbing trailing edge essential MonoKote tissue covering used prevents flaps inducing twist wing reaction flaps being deflected Grain direction should vertical webbing fits should tight forced Spar material should super-light 4-lb balsa Medium-weight wood better Trailing edge sheeting should quarter-grain speckled-appearing wood both stiffness resistance against over-thinning shaping trailing edge capContinued page 150 September1987 69 race flexible push rod serves servo best nothing beats Gold-N-Rod Sullivan Products Because Gold-N-Rods unique design allows lowest friction accurate transfer motion around curves push rod market Heres Exclusive spline design dramatically reduces friction between inner outer rod Sullivans demanding quality control insures tight fit minimal play between inner outer rods Gold-N-Rods special temperature-resistant resins help keep model trim comes convenient applications Gold-N-Rod soars above competition Youll find installation snap adjustments easier using Gold-N-Rods complete kit push rods studs Gold-N-Clevises So dont get thrown curve Instead go gold Gold-N-Rod Sullivan return welcomed valuable contributions future articles Please con tact directly James J Noonan 7454 West Thurston Circle Milwaukee WI 53218 T-60/Dixon Continued page 69 Weight can readily saved hol lowing out spar within about /4 ribs sheeting after wing fully constructed hollow inboard landing gear locations Ribs should also hollowed leave bar vertically about halfway between spar trailing edge guard against covering shrink age flattening airfoil curvature Light5fP7oDroR PRODUC OeeNonhHa nO p Bo66 Bn 66022243000 0.JZ .k.d p. Made n ening holes should also cut nose sections ribs before sheeting grind away back leading edge strip using Robart sanding drum Dremel tool triangle shape left between ribs Fuselage Note 007-in carbon fiber strip reinforcing shown plans greatly augments fuselages resistance bending under air loads adding almost no weight also very important accurately shape wing cutouts perform wing-to-fuselage assembly parts inverted flat surface avoid bending fuselage crutch out alignment during assembly top crutch must remain straight line after wing installed avoid building unwanted incidence tail wheel mount much easier stronger method traditional copper wire lacing Simply place oversized 1/16 ply mount blanks vise drill between /16 drill make groove wire Sandwich tail gear wire between two ply pieces using thick CyA glue join Add maple anchor protruding end wire resist twisting trim whole assembly fit rear fuselage takes longer describe Moving other end take pains keep cowl very light Hollow out much possible coat inside nose cowl Hobby Poxy Formula 2 glue strength fuel resistance heated after application heat gun excess merely poured out heat thins glue soaks ac celerating cure-time Covering out side cowl silkspan helps finishing adds some strength Some people advocate covering nose glass cloth have found necessary canopy shown plans built up sheet balsa origlnal model used cut-down Sig 11-in WW II canopy softened distorted slightly during painting As result future models will have wood possibly fiberglass canopy Ex-Atlantan Lou Melancon avoid ed whole problem T-60 simulating canopy nose section much like Stan Powells Dove Lous plane finished MonoKote came out 4 oz lighter 53 oz also used Sig Chipmunk wheel pants distinctive touch Finishing choice finishing discretion builder model covered Sig Light Flite Plyspan tissue finished Sig nitrate butyrate Lite Coat dope rubbed out using progressively finer grades steel wool polished Dupont white compound waxed As mentioned Lou Melancon MonoKoted plane ex cellent results tip shape prevents usual problems covering wing tips MonoKote Take choice business family pressures am leaning more towards iron-on coverings timesaving ad vantages Further developments next gener ation T-60s will have two-piece plug-in wing removable tail surfaces twin enthusiasms large planes small automobiles forcing move another great advantage ease finishing maintenance individual components Easier storage shipping distant contest sites also pluses Europeans have building way years Well hint adapt plug-in system Byron Originals Continued page 152 150 Model Aviation push comes shove Sullivans Gold-N-Rod smoothest around curves IKON NWST PO Box 566 Dept AM Auburn WA 98071 206 941-8248 PRODUCTS FOR ThE ICCflhhtaflflEifl Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship 8 Performance NEW IMPROVED ** * * LI*lm Wst Medd wIla mare wauli Pews ITU5petenNooes * 7eW3 Oeien nvi1 yeaCORD * *WelarDry *Stick Abrasives * * A Keen Machine gives exceptional * sending control excellent finish 89 Basic nci 1 net Wand 1 eachp C 1 O8~ Soilile Special ncl 2 fiat 1 halfroved wend 5 6 gels 1 2gg Delco ncades 3 hat 2 vat roved *wands 1 beth weeds end tO oh *hgnis *Additional Wends Abrasives availablee C * WANDIT MANUFACTURING 214 2885789 * *PC Box 266 uite Texas 75149C uses its quarter-scale RC models Since plug-in system yet built flying details included would like information about work-in-progress can contacted Suite 401 1938 Peachtree Rd Atlanta GA 30309 Likewise have questions comments model presented feel free write did design building considerations work out its first com petition outing T-60 won 31st King Orange Stunt event Al Lewis Flyoff Trophy spent morning judging Old-Timer Stunt first official flight second total flight day first several hours believe testimony easy handling ac curate flying characteristics design pos sesses T-60 other important events remains seen thing sure though Im glad Ijomed em Im glad let Phoenix live new life larger bird CI Aerobatics/Fancher Continued page 70 hinge almost mandatory since can installedand fact should afterthe model covered Lets make perfectly clear surfaces hinged should slotted accept hinges prior covering Apply covering next seal right over hinge slots slots reopened sharp razor knife should hinges installed installing bellcrank two things very important First sure installation perfectly sound platform must rigidly supported properly glued using either epoxy aliphatic-resin glue bellcrank bolt should firmly tightened nut installed epoxy prevent loosening solder washers nylontype bellcranks pushrod retainers heat may melt nylon disrupt smooth control action use Y32-in Du-Bro wheel collars setscrews firmly tightened epoxied place Second sure flap end pushrod directly line inch above flap hinge line bellcrank neutral will allow proper alignment flap horn thus ensure whole control system will neutral simultaneously shaping sheet balsa flaps tail surfaces use rounded cross section shown plans Dont try taper too thin will unacceptably weakened Now time cut slots hinges Dont attempt get narrow gap between hinged surfaces what usually happens controls end up rubbing depriving both freedom range control movement Just leave natural gap results rounded pinned section hinge Shaping profile fuselage pain neck plywood doublers dont take well carving planing sanding shape seems imposing task Try way Assemble balsa profile fuselage hardwood engine mounts plywood doublers board -in thicker balsa tripler discussed last month Blend square rear edge ply doubler balsa fuse using piece scrap -in balsa already sanded triangular section Now comes tough part shaping front end Believe going sand sucker shape First clamp fuse work bench nose sticks out midair Use either large C-clamp some scrap hardwood protect balsa fuse pile old Model Aviation mags protect against snap ping fuse half shape place piece scrap hardwood under fuse support nose piece one-by-two about three feet long good Now using 2 x 12-in strip coarse 40-grit sandpaper attack side nose though buffing pair shoes As use buffing motion move fore aft removing material uniformly Youll surprised fast can shape front end plywood Now hard part done carve aft fuse pleasant shape using razor plane sandpaper Dont overly taper toward tail doing will weaken area allow tail flex flight Prior final shaping area permanently attach rudder has good solid joint fuselage can faired smoothly Although previous use iron-on coverings limited Top Flites MonoKote chose try Sigs new Supercoat material very pleased its performance activated much lower temperature somewhat Continued page 155 152 Model Aviation GREAT LAKES TRAINER T21A SPAN 64 115 SCALE SEND $200 FOR COMPLETE CATALOG OF FINE KITS 4 N@RTNEA8T AERODWEANICS Inc_______ aic L1BANONSTRET ORO MAINE 04073 517-460-IUl PERIOR DESIGN ORAFTSMANSHIPThe Finest Kits Youll Ever Buy Build Train-Air 20 Train-Air 40 Sport-Air 40 Bel-Air 40 40 Hydro-Floats EEL7A7IiO. Ths need easy handling superior serobatlc modern looking sport exhIbition biplane has filfed 5664k AS kit parta biplane tin line at- kita machine cut assist buIlding reaf ahow Sal-AIr 60 has fully sunimetrical wing sections ThIs gives greatest potential aerobatic panormance either upright inverted ship capable very slow close-in type flight right up rlgoroua aerobatic schedule can muster SPEC IFICATIONS ktgine Requirementany 60Fuesiage Width35 Wiep Span52WeIght RengeB 75 lbs WIng Area955 0Wing Loading Range14810 185 Fuselage Length46 207-490-1661 VIas Mastercard Accepted