Control Line Aerobatics Ted Fancher LETS get right back Sig Twister project started last month major reasons selected Twister its ease construction constant-chord wing means ribs same size square tips can built directly firm flat surface Youve heard beforeand aint guarantee will againthat single important part Stunt ship straight wing. thats truth Cover firm flat surface sheet soft composition material comes 4-ft 8-ft sheets lumber hardware store firm about -in thick accepts pins easily generic term insulation board RMCM Most dealers will cut convenient size you ask Build wing directly plans described kits full-size plans Cover plans Saran wrap first prevent becoming part wing techniques may help Whenever possible use masking tape rather straight pins hold pieces place instance installing leading edge hold place strips tape going lower spar around leading edge back upper spar couple bays between ribs will position leading edge firmly wont split ribs will pins will leave access rib joint glue application Note Twisters uniflow tank details arrow points sealed tube overflowvent arrow B points unifiow vent line can finetune engine runs changing exhaust back-pressure Using SST Products muf fler makes task easy since 4-40 screws can plugged outlet holes vary back-pressure its subtle refinement experienced fliers glue everything possible cyanoacrylate CyA follow up coat aliphatic resin-type glue ie Tite-Bond etc applied small cheap brush intend use RC nylon-type hinges rather cloth ones shown plans sure glue scrap balsa between trailing edge sheeting accept types hinges such Du-Bro Klett much preferable cloth hinges operate much freely seldom break somewhat easier install addition plan finishing model iron-on type covering type Continued page 152 Flat inboard edges elevators flaps covered first too Note Ted instal led 1/8-in basswood inserts accept Heres neat Job covering large flat surfaces iron-on film Cut piece nylon control horns bare balsa surface film oversize coverthe flat area first coax over edge piece iron down compressed weakened hornstrip edges later trim about 1/8-in wide mounting screws tightened down 70 Model Aviation Final shaping Twister nose 100-grit sandpaper previously rough-formed veiy coarse 40-grit sandpaper Note nozzle shop vacuum lashed nearby suck up dust its good idea also wear filter mask doing job like modelers best friend ismasking tape LI youre sanding piece match structure aireadyfinished size can protect finished wood tape Although may sand through can always put fresh strip will payyou exercise some care slotting thin wood surfaces forthe instaliation nylon hinges Ted makes things extra simple Dremel drill press Center drills very fine guide-hole end potential hinge slot ensures slotting tool R will follow pilot holes straight woodit keeps digging crooked slot coming out side balsa sheet Surface still unshaped 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 easier apply Its best characteristic its ability applied sheet surfacessuch stab elevators flapswithout irritating trapped-air bubbles Merely tack inch around perimeter shrink down flat Finally completely seal entire perimeter Heres hint neatly covering areas such flat wing tips innermost flat edges surfaces like flaps elevators Cover first separately larger flat areas Trim excess within around edges Now apply covering major surfaces slightly overlapping already covered area Trim closely again seal around corners Done properly seams will nearly disappear thejointwill completely sealed no unsightly excess covering hanging around always cover wing tail before instal lation Neatly mark eventual fuselage loca tion apply Supercoat up within Once wing tall covered install unfinished fuselage extremely careful installed square fuselage other Remember Stunt straight peat crooked pits Use either epoxy aliphatic resin very important wing/fuselage joint must ex tremely strong brittle gaps jointespecially leading edgefill scrap balsa ensure sealed joint Fillets glue joint dry mask off wing tall about ring exposed next fuselage Cut tip off Sig glue gun open up hole up enough Sig Epoxolite top bottom wing entire tall once Dont try time material may start harden before done modeling shape Using modified glue gun carefully apply uniform 3/16-in bead Epoxolite Youll need experiment little learn much needed forewarned will take less material think Keeping finger wet plain tap water lightly mold fillet approximate shape Use tip round-bladed propagain kept wet achieve final uniform shape use Top Flite 7 x 3 Carefully remove excess Epoxolite lightly feather edges fillet wet finger allow cure completely fillet thus applied should overlap plastic covering wing tail will seal joints securely addition further strengthening wing/fuse joint After Epoxolite cures will notice oily feel its surface Remove either Sig Airplane Cleaner dope thinner Failure may cause paint finish bubble over fillets Pactras Formula U can applied over aimost filler material souse favorite covered fuse light silkspan applied dampened over two full-strength coats Sig dope applied couple coats Sig Balsa Fillercoat Sand filler carefully between coats until smooth surface achieved Seal filler 50/50 clear-dope/thinner mix After dope dries completely shoot very light couple medium coats Formula U color choice stand back watch shine day trim ship made MonoKote Trim Sheets ensure identical shapes both sides model first cut MOST OF OUR SALES ARE FROM WORD OF MOUTH RP California used CESSNA 1 B2to train wife fly GE Colorado NEED WE SAY MORE. PICA PRODUCTS 2657 NE 188th ST MIAMI FLA 33180 Phone 1-305-935-1436 design pattern thin cardboard such department store gift boxes use patterns cut trim sheets Make certain make right- left-side designs secret applying sticky critters exactly want trapped air bubbles ladys cleaning cupboards spray window-cleaner use Glass Plus Windex Spray liberal amount completely over area intend locate trim Remove backing locate trim approximately want spray will prevent sticking until have positioned exactly desired Hold position hand take paper towel working middle squeegee spray solution out under trim until bubbles removed Once solution out trim permanently xed. right want Now can spend afternoon finishing up detail items Glue hinges epoxy Mount control horns securely holes pushrod directly over hinge line will ensure equal up down move ment Bend pushrod shape install formed slight Z bend seen photos allows pushrod effectively lengthened shortened sometimes helpful flight trimming Dont forget install pushrod fairlead Du-Bro retainers Use pushrod holes shown plans provide one-to-one control ratio flaps elevators Mount engine photos may see Midwest thrust wedges used provide 30 engine offset items also available Parma Company RC Car department come sets 10 20 3O September 1987 155 T-28 B best scale trainer ever flew Hey Nothing beats RA 4 fun flys yIf1ars Limited Edition ectors Issue Capture action excitement planes pilots years NATS beautiful 14 page full color 12 xl 8 commemorative 1988 calendarl ORDER NOWmonly $995 Before thisLII~ZIIoLShipping & handling LIMITED EDITIONtWJ$2 50 first calendar Collectors Calendar sold ESSIVE IMAGE STUDIOS $100 ea addtl OFFICIAL Photographers AMA NATS 6818 Odana Road Madison WI 53719 608 833-9490 Mount tank connect tubes required choose use uniflow system discussed last month hook up see pictures ie uniflow pipe connected fuse-mounted filler tube overflow tube capped piece ofsealed tubing cap will removed fill tank replaced Final weight modified Twister can anywhere 35 40 oz Mine came out 38 balanced between three-quarters inch forward spot shown plan CG using Merco 40 spinner muffler OS 40 stock muffler choose use longer tail moreforward CG will provide sedate first flight positive line tension Very little wing tip ballast necessary profile since weight engine tank controls outboard centerline forgot cut wing tip remove some ballast would start out add flight tests show necessary pick model up crankshaft tail outboard wing should drop softly ground Betcha does See field Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Scale/Boss Continued page 71 along subject model unit static judging Proper documentation model towing system towed object must provided within specified number pages allowable data Please note rule interpretation personal interpretation Dave has indicated Michacls need further official consideration question Michaels should ask full Scale Contest Board interpretation would like close discussion rules two thoughts First reminder members Scale Contest Board have already cast Final Vote current set rules-change proposals Second have particular section rules believe needs discussion column would too glad hear Something newfrom Bell Rock Industries BRI helps make building easier its Grate-Shapes Weight-Mates GreatShapes series sanding blocks about 10 long number shapes thatwill fit almost model sanding chores silicon carbide grit sanding tools made work surfaces suitable shaping round flat square V concave surfaces offered number sizes shape style sanding tools excellent doing much rough sanding such parts leading trailing edges wings tall surfaces long straight edges word caution offered BRI recommend tools used balsawood foam other soft materials recommended use hard gummy woods metal materials will greatly shorten useful lives Prices Grate-Shapes range $495 set three squares sized $2195 six-pack combination other item mentioned Weight-Mates four- six-inch canvas-like bags filled lead shot sand weigh approx imately five pounds can used hold model parts firmly place during construction bags can also used tie-downs model during transportation bags come five pack sell $695 complete detalls sizes shapes pricing write BRI 6486 Hwy 179Suite 108 Sedona AZ 86336 Contest activity September 20 1987 Garden State Circle Burners GSCB will hosting its annual Bendix/Teterboro Scale rally Precision Sport Profile classes being offered awards form trophies merchandise fifth place event George Gaydos CD hoping years entries wlll surpass 23 last year meet held Bendix Co parking lot adjacent west side Teterboro airport all-blacktop parking lot makes good Scale flying AMA rules apply Precision Sport classes Profile event will flown according GSCBs own rules full contest details copy Profile Scale rules write G Gaydos 8 Dapp Court Elmwood Park NJ 07407 Please send correspondenceespecially photosrelating CL Scale Bill Boss 7706 269th Street New Hyde Park NY 11040 responding advertisers mention read about Model Aviation CL Speed/Hempel Continued page 72 envelope SASE address given end column Another hot item related Speed upcoming -scale NHRA National Hot Rod Association drag-racing funny cars Since Texas hotbed racing activity Southwest full-size racing cars well model cars recently opportunity work some wild little machines speeds attained model cars reach over 100 mph Some technical notes concerning model cars follows frame constructed aircraft-grade tubular steel heli-arc welded rigid built-in roll cage beautiful hand-laid fiberglass body covers frame sold ready paint racing decor centrifugal clutch drive traln permits easy starting engine smooth idling fast acceleration Dual inboard rear disc brakes combined real working drag parachute provide means slowing down after fast run down track several types englnes used cars engine used manufacturer cars months photos Zenoah 140 two-cycle chromed cylinder bore engines have plenty space cylinder experiment port timing engine coupled rear wheels fully enclosed three-stage gearbox Different gear ratios available rear drive axle participation model racing events averages 25 30 entrants weekend race track Its very exciting informa tion mail SASE Discount RYC Hobbies 605 South Sherman St Richardson TX 75081 telephone number 214 669-3705 Gene Hempel 301N YaleDr Garland TX 75042 CL Racing/Ballard Continued page 73 engines will dominant force Nationals since seem overpower almost K&B OS presently existence Slow Rat times averaged under six minutes good first major meet 87 Midwest season Engine modification to K&B 15 am Continued page 158 156 Model Aviation HOBBYPOXY TRUE TM-PART EPOXY PAINTS 16 COLORS R ER EPOXY GLUES FOUR FORMULAS 5-MIN 1V 45-MIN FAST FILL GRAIN FILLER QUICK-PREP POLYESTER RESIN FREE COLOR CARD AND BROCHURE HOWfPOXY DIVISION P116 Pwini Company Inc 36 Pine Sired Rocieway NJ 07666
Edition: Model Aviation - 1987/09
Page Numbers: 70, 152, 155, 156
Control Line Aerobatics Ted Fancher LETS get right back Sig Twister project started last month major reasons selected Twister its ease construction constant-chord wing means ribs same size square tips can built directly firm flat surface Youve heard beforeand aint guarantee will againthat single important part Stunt ship straight wing. thats truth Cover firm flat surface sheet soft composition material comes 4-ft 8-ft sheets lumber hardware store firm about -in thick accepts pins easily generic term insulation board RMCM Most dealers will cut convenient size you ask Build wing directly plans described kits full-size plans Cover plans Saran wrap first prevent becoming part wing techniques may help Whenever possible use masking tape rather straight pins hold pieces place instance installing leading edge hold place strips tape going lower spar around leading edge back upper spar couple bays between ribs will position leading edge firmly wont split ribs will pins will leave access rib joint glue application Note Twisters uniflow tank details arrow points sealed tube overflowvent arrow B points unifiow vent line can finetune engine runs changing exhaust back-pressure Using SST Products muf fler makes task easy since 4-40 screws can plugged outlet holes vary back-pressure its subtle refinement experienced fliers glue everything possible cyanoacrylate CyA follow up coat aliphatic resin-type glue ie Tite-Bond etc applied small cheap brush intend use RC nylon-type hinges rather cloth ones shown plans sure glue scrap balsa between trailing edge sheeting accept types hinges such Du-Bro Klett much preferable cloth hinges operate much freely seldom break somewhat easier install addition plan finishing model iron-on type covering type Continued page 152 Flat inboard edges elevators flaps covered first too Note Ted instal led 1/8-in basswood inserts accept Heres neat Job covering large flat surfaces iron-on film Cut piece nylon control horns bare balsa surface film oversize coverthe flat area first coax over edge piece iron down compressed weakened hornstrip edges later trim about 1/8-in wide mounting screws tightened down 70 Model Aviation Final shaping Twister nose 100-grit sandpaper previously rough-formed veiy coarse 40-grit sandpaper Note nozzle shop vacuum lashed nearby suck up dust its good idea also wear filter mask doing job like modelers best friend ismasking tape LI youre sanding piece match structure aireadyfinished size can protect finished wood tape Although may sand through can always put fresh strip will payyou exercise some care slotting thin wood surfaces forthe instaliation nylon hinges Ted makes things extra simple Dremel drill press Center drills very fine guide-hole end potential hinge slot ensures slotting tool R will follow pilot holes straight woodit keeps digging crooked slot coming out side balsa sheet Surface still unshaped 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 easier apply Its best characteristic its ability applied sheet surfacessuch stab elevators flapswithout irritating trapped-air bubbles Merely tack inch around perimeter shrink down flat Finally completely seal entire perimeter Heres hint neatly covering areas such flat wing tips innermost flat edges surfaces like flaps elevators Cover first separately larger flat areas Trim excess within around edges Now apply covering major surfaces slightly overlapping already covered area Trim closely again seal around corners Done properly seams will nearly disappear thejointwill completely sealed no unsightly excess covering hanging around always cover wing tail before instal lation Neatly mark eventual fuselage loca tion apply Supercoat up within Once wing tall covered install unfinished fuselage extremely careful installed square fuselage other Remember Stunt straight peat crooked pits Use either epoxy aliphatic resin very important wing/fuselage joint must ex tremely strong brittle gaps jointespecially leading edgefill scrap balsa ensure sealed joint Fillets glue joint dry mask off wing tall about ring exposed next fuselage Cut tip off Sig glue gun open up hole up enough Sig Epoxolite top bottom wing entire tall once Dont try time material may start harden before done modeling shape Using modified glue gun carefully apply uniform 3/16-in bead Epoxolite Youll need experiment little learn much needed forewarned will take less material think Keeping finger wet plain tap water lightly mold fillet approximate shape Use tip round-bladed propagain kept wet achieve final uniform shape use Top Flite 7 x 3 Carefully remove excess Epoxolite lightly feather edges fillet wet finger allow cure completely fillet thus applied should overlap plastic covering wing tail will seal joints securely addition further strengthening wing/fuse joint After Epoxolite cures will notice oily feel its surface Remove either Sig Airplane Cleaner dope thinner Failure may cause paint finish bubble over fillets Pactras Formula U can applied over aimost filler material souse favorite covered fuse light silkspan applied dampened over two full-strength coats Sig dope applied couple coats Sig Balsa Fillercoat Sand filler carefully between coats until smooth surface achieved Seal filler 50/50 clear-dope/thinner mix After dope dries completely shoot very light couple medium coats Formula U color choice stand back watch shine day trim ship made MonoKote Trim Sheets ensure identical shapes both sides model first cut MOST OF OUR SALES ARE FROM WORD OF MOUTH RP California used CESSNA 1 B2to train wife fly GE Colorado NEED WE SAY MORE. PICA PRODUCTS 2657 NE 188th ST MIAMI FLA 33180 Phone 1-305-935-1436 design pattern thin cardboard such department store gift boxes use patterns cut trim sheets Make certain make right- left-side designs secret applying sticky critters exactly want trapped air bubbles ladys cleaning cupboards spray window-cleaner use Glass Plus Windex Spray liberal amount completely over area intend locate trim Remove backing locate trim approximately want spray will prevent sticking until have positioned exactly desired Hold position hand take paper towel working middle squeegee spray solution out under trim until bubbles removed Once solution out trim permanently xed. right want Now can spend afternoon finishing up detail items Glue hinges epoxy Mount control horns securely holes pushrod directly over hinge line will ensure equal up down move ment Bend pushrod shape install formed slight Z bend seen photos allows pushrod effectively lengthened shortened sometimes helpful flight trimming Dont forget install pushrod fairlead Du-Bro retainers Use pushrod holes shown plans provide one-to-one control ratio flaps elevators Mount engine photos may see Midwest thrust wedges used provide 30 engine offset items also available Parma Company RC Car department come sets 10 20 3O September 1987 155 T-28 B best scale trainer ever flew Hey Nothing beats RA 4 fun flys yIf1ars Limited Edition ectors Issue Capture action excitement planes pilots years NATS beautiful 14 page full color 12 xl 8 commemorative 1988 calendarl ORDER NOWmonly $995 Before thisLII~ZIIoLShipping & handling LIMITED EDITIONtWJ$2 50 first calendar Collectors Calendar sold ESSIVE IMAGE STUDIOS $100 ea addtl OFFICIAL Photographers AMA NATS 6818 Odana Road Madison WI 53719 608 833-9490 Mount tank connect tubes required choose use uniflow system discussed last month hook up see pictures ie uniflow pipe connected fuse-mounted filler tube overflow tube capped piece ofsealed tubing cap will removed fill tank replaced Final weight modified Twister can anywhere 35 40 oz Mine came out 38 balanced between three-quarters inch forward spot shown plan CG using Merco 40 spinner muffler OS 40 stock muffler choose use longer tail moreforward CG will provide sedate first flight positive line tension Very little wing tip ballast necessary profile since weight engine tank controls outboard centerline forgot cut wing tip remove some ballast would start out add flight tests show necessary pick model up crankshaft tail outboard wing should drop softly ground Betcha does See field Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Scale/Boss Continued page 71 along subject model unit static judging Proper documentation model towing system towed object must provided within specified number pages allowable data Please note rule interpretation personal interpretation Dave has indicated Michacls need further official consideration question Michaels should ask full Scale Contest Board interpretation would like close discussion rules two thoughts First reminder members Scale Contest Board have already cast Final Vote current set rules-change proposals Second have particular section rules believe needs discussion column would too glad hear Something newfrom Bell Rock Industries BRI helps make building easier its Grate-Shapes Weight-Mates GreatShapes series sanding blocks about 10 long number shapes thatwill fit almost model sanding chores silicon carbide grit sanding tools made work surfaces suitable shaping round flat square V concave surfaces offered number sizes shape style sanding tools excellent doing much rough sanding such parts leading trailing edges wings tall surfaces long straight edges word caution offered BRI recommend tools used balsawood foam other soft materials recommended use hard gummy woods metal materials will greatly shorten useful lives Prices Grate-Shapes range $495 set three squares sized $2195 six-pack combination other item mentioned Weight-Mates four- six-inch canvas-like bags filled lead shot sand weigh approx imately five pounds can used hold model parts firmly place during construction bags can also used tie-downs model during transportation bags come five pack sell $695 complete detalls sizes shapes pricing write BRI 6486 Hwy 179Suite 108 Sedona AZ 86336 Contest activity September 20 1987 Garden State Circle Burners GSCB will hosting its annual Bendix/Teterboro Scale rally Precision Sport Profile classes being offered awards form trophies merchandise fifth place event George Gaydos CD hoping years entries wlll surpass 23 last year meet held Bendix Co parking lot adjacent west side Teterboro airport all-blacktop parking lot makes good Scale flying AMA rules apply Precision Sport classes Profile event will flown according GSCBs own rules full contest details copy Profile Scale rules write G Gaydos 8 Dapp Court Elmwood Park NJ 07407 Please send correspondenceespecially photosrelating CL Scale Bill Boss 7706 269th Street New Hyde Park NY 11040 responding advertisers mention read about Model Aviation CL Speed/Hempel Continued page 72 envelope SASE address given end column Another hot item related Speed upcoming -scale NHRA National Hot Rod Association drag-racing funny cars Since Texas hotbed racing activity Southwest full-size racing cars well model cars recently opportunity work some wild little machines speeds attained model cars reach over 100 mph Some technical notes concerning model cars follows frame constructed aircraft-grade tubular steel heli-arc welded rigid built-in roll cage beautiful hand-laid fiberglass body covers frame sold ready paint racing decor centrifugal clutch drive traln permits easy starting engine smooth idling fast acceleration Dual inboard rear disc brakes combined real working drag parachute provide means slowing down after fast run down track several types englnes used cars engine used manufacturer cars months photos Zenoah 140 two-cycle chromed cylinder bore engines have plenty space cylinder experiment port timing engine coupled rear wheels fully enclosed three-stage gearbox Different gear ratios available rear drive axle participation model racing events averages 25 30 entrants weekend race track Its very exciting informa tion mail SASE Discount RYC Hobbies 605 South Sherman St Richardson TX 75081 telephone number 214 669-3705 Gene Hempel 301N YaleDr Garland TX 75042 CL Racing/Ballard Continued page 73 engines will dominant force Nationals since seem overpower almost K&B OS presently existence Slow Rat times averaged under six minutes good first major meet 87 Midwest season Engine modification to K&B 15 am Continued page 158 156 Model Aviation HOBBYPOXY TRUE TM-PART EPOXY PAINTS 16 COLORS R ER EPOXY GLUES FOUR FORMULAS 5-MIN 1V 45-MIN FAST FILL GRAIN FILLER QUICK-PREP POLYESTER RESIN FREE COLOR CARD AND BROCHURE HOWfPOXY DIVISION P116 Pwini Company Inc 36 Pine Sired Rocieway NJ 07666
Edition: Model Aviation - 1987/09
Page Numbers: 70, 152, 155, 156
Control Line Aerobatics Ted Fancher LETS get right back Sig Twister project started last month major reasons selected Twister its ease construction constant-chord wing means ribs same size square tips can built directly firm flat surface Youve heard beforeand aint guarantee will againthat single important part Stunt ship straight wing. thats truth Cover firm flat surface sheet soft composition material comes 4-ft 8-ft sheets lumber hardware store firm about -in thick accepts pins easily generic term insulation board RMCM Most dealers will cut convenient size you ask Build wing directly plans described kits full-size plans Cover plans Saran wrap first prevent becoming part wing techniques may help Whenever possible use masking tape rather straight pins hold pieces place instance installing leading edge hold place strips tape going lower spar around leading edge back upper spar couple bays between ribs will position leading edge firmly wont split ribs will pins will leave access rib joint glue application Note Twisters uniflow tank details arrow points sealed tube overflowvent arrow B points unifiow vent line can finetune engine runs changing exhaust back-pressure Using SST Products muf fler makes task easy since 4-40 screws can plugged outlet holes vary back-pressure its subtle refinement experienced fliers glue everything possible cyanoacrylate CyA follow up coat aliphatic resin-type glue ie Tite-Bond etc applied small cheap brush intend use RC nylon-type hinges rather cloth ones shown plans sure glue scrap balsa between trailing edge sheeting accept types hinges such Du-Bro Klett much preferable cloth hinges operate much freely seldom break somewhat easier install addition plan finishing model iron-on type covering type Continued page 152 Flat inboard edges elevators flaps covered first too Note Ted instal led 1/8-in basswood inserts accept Heres neat Job covering large flat surfaces iron-on film Cut piece nylon control horns bare balsa surface film oversize coverthe flat area first coax over edge piece iron down compressed weakened hornstrip edges later trim about 1/8-in wide mounting screws tightened down 70 Model Aviation Final shaping Twister nose 100-grit sandpaper previously rough-formed veiy coarse 40-grit sandpaper Note nozzle shop vacuum lashed nearby suck up dust its good idea also wear filter mask doing job like modelers best friend ismasking tape LI youre sanding piece match structure aireadyfinished size can protect finished wood tape Although may sand through can always put fresh strip will payyou exercise some care slotting thin wood surfaces forthe instaliation nylon hinges Ted makes things extra simple Dremel drill press Center drills very fine guide-hole end potential hinge slot ensures slotting tool R will follow pilot holes straight woodit keeps digging crooked slot coming out side balsa sheet Surface still unshaped 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 easier apply Its best characteristic its ability applied sheet surfacessuch stab elevators flapswithout irritating trapped-air bubbles Merely tack inch around perimeter shrink down flat Finally completely seal entire perimeter Heres hint neatly covering areas such flat wing tips innermost flat edges surfaces like flaps elevators Cover first separately larger flat areas Trim excess within around edges Now apply covering major surfaces slightly overlapping already covered area Trim closely again seal around corners Done properly seams will nearly disappear thejointwill completely sealed no unsightly excess covering hanging around always cover wing tail before instal lation Neatly mark eventual fuselage loca tion apply Supercoat up within Once wing tall covered install unfinished fuselage extremely careful installed square fuselage other Remember Stunt straight peat crooked pits Use either epoxy aliphatic resin very important wing/fuselage joint must ex tremely strong brittle gaps jointespecially leading edgefill scrap balsa ensure sealed joint Fillets glue joint dry mask off wing tall about ring exposed next fuselage Cut tip off Sig glue gun open up hole up enough Sig Epoxolite top bottom wing entire tall once Dont try time material may start harden before done modeling shape Using modified glue gun carefully apply uniform 3/16-in bead Epoxolite Youll need experiment little learn much needed forewarned will take less material think Keeping finger wet plain tap water lightly mold fillet approximate shape Use tip round-bladed propagain kept wet achieve final uniform shape use Top Flite 7 x 3 Carefully remove excess Epoxolite lightly feather edges fillet wet finger allow cure completely fillet thus applied should overlap plastic covering wing tail will seal joints securely addition further strengthening wing/fuse joint After Epoxolite cures will notice oily feel its surface Remove either Sig Airplane Cleaner dope thinner Failure may cause paint finish bubble over fillets Pactras Formula U can applied over aimost filler material souse favorite covered fuse light silkspan applied dampened over two full-strength coats Sig dope applied couple coats Sig Balsa Fillercoat Sand filler carefully between coats until smooth surface achieved Seal filler 50/50 clear-dope/thinner mix After dope dries completely shoot very light couple medium coats Formula U color choice stand back watch shine day trim ship made MonoKote Trim Sheets ensure identical shapes both sides model first cut MOST OF OUR SALES ARE FROM WORD OF MOUTH RP California used CESSNA 1 B2to train wife fly GE Colorado NEED WE SAY MORE. PICA PRODUCTS 2657 NE 188th ST MIAMI FLA 33180 Phone 1-305-935-1436 design pattern thin cardboard such department store gift boxes use patterns cut trim sheets Make certain make right- left-side designs secret applying sticky critters exactly want trapped air bubbles ladys cleaning cupboards spray window-cleaner use Glass Plus Windex Spray liberal amount completely over area intend locate trim Remove backing locate trim approximately want spray will prevent sticking until have positioned exactly desired Hold position hand take paper towel working middle squeegee spray solution out under trim until bubbles removed Once solution out trim permanently xed. right want Now can spend afternoon finishing up detail items Glue hinges epoxy Mount control horns securely holes pushrod directly over hinge line will ensure equal up down move ment Bend pushrod shape install formed slight Z bend seen photos allows pushrod effectively lengthened shortened sometimes helpful flight trimming Dont forget install pushrod fairlead Du-Bro retainers Use pushrod holes shown plans provide one-to-one control ratio flaps elevators Mount engine photos may see Midwest thrust wedges used provide 30 engine offset items also available Parma Company RC Car department come sets 10 20 3O September 1987 155 T-28 B best scale trainer ever flew Hey Nothing beats RA 4 fun flys yIf1ars Limited Edition ectors Issue Capture action excitement planes pilots years NATS beautiful 14 page full color 12 xl 8 commemorative 1988 calendarl ORDER NOWmonly $995 Before thisLII~ZIIoLShipping & handling LIMITED EDITIONtWJ$2 50 first calendar Collectors Calendar sold ESSIVE IMAGE STUDIOS $100 ea addtl OFFICIAL Photographers AMA NATS 6818 Odana Road Madison WI 53719 608 833-9490 Mount tank connect tubes required choose use uniflow system discussed last month hook up see pictures ie uniflow pipe connected fuse-mounted filler tube overflow tube capped piece ofsealed tubing cap will removed fill tank replaced Final weight modified Twister can anywhere 35 40 oz Mine came out 38 balanced between three-quarters inch forward spot shown plan CG using Merco 40 spinner muffler OS 40 stock muffler choose use longer tail moreforward CG will provide sedate first flight positive line tension Very little wing tip ballast necessary profile since weight engine tank controls outboard centerline forgot cut wing tip remove some ballast would start out add flight tests show necessary pick model up crankshaft tail outboard wing should drop softly ground Betcha does See field Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Scale/Boss Continued page 71 along subject model unit static judging Proper documentation model towing system towed object must provided within specified number pages allowable data Please note rule interpretation personal interpretation Dave has indicated Michacls need further official consideration question Michaels should ask full Scale Contest Board interpretation would like close discussion rules two thoughts First reminder members Scale Contest Board have already cast Final Vote current set rules-change proposals Second have particular section rules believe needs discussion column would too glad hear Something newfrom Bell Rock Industries BRI helps make building easier its Grate-Shapes Weight-Mates GreatShapes series sanding blocks about 10 long number shapes thatwill fit almost model sanding chores silicon carbide grit sanding tools made work surfaces suitable shaping round flat square V concave surfaces offered number sizes shape style sanding tools excellent doing much rough sanding such parts leading trailing edges wings tall surfaces long straight edges word caution offered BRI recommend tools used balsawood foam other soft materials recommended use hard gummy woods metal materials will greatly shorten useful lives Prices Grate-Shapes range $495 set three squares sized $2195 six-pack combination other item mentioned Weight-Mates four- six-inch canvas-like bags filled lead shot sand weigh approx imately five pounds can used hold model parts firmly place during construction bags can also used tie-downs model during transportation bags come five pack sell $695 complete detalls sizes shapes pricing write BRI 6486 Hwy 179Suite 108 Sedona AZ 86336 Contest activity September 20 1987 Garden State Circle Burners GSCB will hosting its annual Bendix/Teterboro Scale rally Precision Sport Profile classes being offered awards form trophies merchandise fifth place event George Gaydos CD hoping years entries wlll surpass 23 last year meet held Bendix Co parking lot adjacent west side Teterboro airport all-blacktop parking lot makes good Scale flying AMA rules apply Precision Sport classes Profile event will flown according GSCBs own rules full contest details copy Profile Scale rules write G Gaydos 8 Dapp Court Elmwood Park NJ 07407 Please send correspondenceespecially photosrelating CL Scale Bill Boss 7706 269th Street New Hyde Park NY 11040 responding advertisers mention read about Model Aviation CL Speed/Hempel Continued page 72 envelope SASE address given end column Another hot item related Speed upcoming -scale NHRA National Hot Rod Association drag-racing funny cars Since Texas hotbed racing activity Southwest full-size racing cars well model cars recently opportunity work some wild little machines speeds attained model cars reach over 100 mph Some technical notes concerning model cars follows frame constructed aircraft-grade tubular steel heli-arc welded rigid built-in roll cage beautiful hand-laid fiberglass body covers frame sold ready paint racing decor centrifugal clutch drive traln permits easy starting engine smooth idling fast acceleration Dual inboard rear disc brakes combined real working drag parachute provide means slowing down after fast run down track several types englnes used cars engine used manufacturer cars months photos Zenoah 140 two-cycle chromed cylinder bore engines have plenty space cylinder experiment port timing engine coupled rear wheels fully enclosed three-stage gearbox Different gear ratios available rear drive axle participation model racing events averages 25 30 entrants weekend race track Its very exciting informa tion mail SASE Discount RYC Hobbies 605 South Sherman St Richardson TX 75081 telephone number 214 669-3705 Gene Hempel 301N YaleDr Garland TX 75042 CL Racing/Ballard Continued page 73 engines will dominant force Nationals since seem overpower almost K&B OS presently existence Slow Rat times averaged under six minutes good first major meet 87 Midwest season Engine modification to K&B 15 am Continued page 158 156 Model Aviation HOBBYPOXY TRUE TM-PART EPOXY PAINTS 16 COLORS R ER EPOXY GLUES FOUR FORMULAS 5-MIN 1V 45-MIN FAST FILL GRAIN FILLER QUICK-PREP POLYESTER RESIN FREE COLOR CARD AND BROCHURE HOWfPOXY DIVISION P116 Pwini Company Inc 36 Pine Sired Rocieway NJ 07666
Edition: Model Aviation - 1987/09
Page Numbers: 70, 152, 155, 156
Control Line Aerobatics Ted Fancher LETS get right back Sig Twister project started last month major reasons selected Twister its ease construction constant-chord wing means ribs same size square tips can built directly firm flat surface Youve heard beforeand aint guarantee will againthat single important part Stunt ship straight wing. thats truth Cover firm flat surface sheet soft composition material comes 4-ft 8-ft sheets lumber hardware store firm about -in thick accepts pins easily generic term insulation board RMCM Most dealers will cut convenient size you ask Build wing directly plans described kits full-size plans Cover plans Saran wrap first prevent becoming part wing techniques may help Whenever possible use masking tape rather straight pins hold pieces place instance installing leading edge hold place strips tape going lower spar around leading edge back upper spar couple bays between ribs will position leading edge firmly wont split ribs will pins will leave access rib joint glue application Note Twisters uniflow tank details arrow points sealed tube overflowvent arrow B points unifiow vent line can finetune engine runs changing exhaust back-pressure Using SST Products muf fler makes task easy since 4-40 screws can plugged outlet holes vary back-pressure its subtle refinement experienced fliers glue everything possible cyanoacrylate CyA follow up coat aliphatic resin-type glue ie Tite-Bond etc applied small cheap brush intend use RC nylon-type hinges rather cloth ones shown plans sure glue scrap balsa between trailing edge sheeting accept types hinges such Du-Bro Klett much preferable cloth hinges operate much freely seldom break somewhat easier install addition plan finishing model iron-on type covering type Continued page 152 Flat inboard edges elevators flaps covered first too Note Ted instal led 1/8-in basswood inserts accept Heres neat Job covering large flat surfaces iron-on film Cut piece nylon control horns bare balsa surface film oversize coverthe flat area first coax over edge piece iron down compressed weakened hornstrip edges later trim about 1/8-in wide mounting screws tightened down 70 Model Aviation Final shaping Twister nose 100-grit sandpaper previously rough-formed veiy coarse 40-grit sandpaper Note nozzle shop vacuum lashed nearby suck up dust its good idea also wear filter mask doing job like modelers best friend ismasking tape LI youre sanding piece match structure aireadyfinished size can protect finished wood tape Although may sand through can always put fresh strip will payyou exercise some care slotting thin wood surfaces forthe instaliation nylon hinges Ted makes things extra simple Dremel drill press Center drills very fine guide-hole end potential hinge slot ensures slotting tool R will follow pilot holes straight woodit keeps digging crooked slot coming out side balsa sheet Surface still unshaped 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 easier apply Its best characteristic its ability applied sheet surfacessuch stab elevators flapswithout irritating trapped-air bubbles Merely tack inch around perimeter shrink down flat Finally completely seal entire perimeter Heres hint neatly covering areas such flat wing tips innermost flat edges surfaces like flaps elevators Cover first separately larger flat areas Trim excess within around edges Now apply covering major surfaces slightly overlapping already covered area Trim closely again seal around corners Done properly seams will nearly disappear thejointwill completely sealed no unsightly excess covering hanging around always cover wing tail before instal lation Neatly mark eventual fuselage loca tion apply Supercoat up within Once wing tall covered install unfinished fuselage extremely careful installed square fuselage other Remember Stunt straight peat crooked pits Use either epoxy aliphatic resin very important wing/fuselage joint must ex tremely strong brittle gaps jointespecially leading edgefill scrap balsa ensure sealed joint Fillets glue joint dry mask off wing tall about ring exposed next fuselage Cut tip off Sig glue gun open up hole up enough Sig Epoxolite top bottom wing entire tall once Dont try time material may start harden before done modeling shape Using modified glue gun carefully apply uniform 3/16-in bead Epoxolite Youll need experiment little learn much needed forewarned will take less material think Keeping finger wet plain tap water lightly mold fillet approximate shape Use tip round-bladed propagain kept wet achieve final uniform shape use Top Flite 7 x 3 Carefully remove excess Epoxolite lightly feather edges fillet wet finger allow cure completely fillet thus applied should overlap plastic covering wing tail will seal joints securely addition further strengthening wing/fuse joint After Epoxolite cures will notice oily feel its surface Remove either Sig Airplane Cleaner dope thinner Failure may cause paint finish bubble over fillets Pactras Formula U can applied over aimost filler material souse favorite covered fuse light silkspan applied dampened over two full-strength coats Sig dope applied couple coats Sig Balsa Fillercoat Sand filler carefully between coats until smooth surface achieved Seal filler 50/50 clear-dope/thinner mix After dope dries completely shoot very light couple medium coats Formula U color choice stand back watch shine day trim ship made MonoKote Trim Sheets ensure identical shapes both sides model first cut MOST OF OUR SALES ARE FROM WORD OF MOUTH RP California used CESSNA 1 B2to train wife fly GE Colorado NEED WE SAY MORE. PICA PRODUCTS 2657 NE 188th ST MIAMI FLA 33180 Phone 1-305-935-1436 design pattern thin cardboard such department store gift boxes use patterns cut trim sheets Make certain make right- left-side designs secret applying sticky critters exactly want trapped air bubbles ladys cleaning cupboards spray window-cleaner use Glass Plus Windex Spray liberal amount completely over area intend locate trim Remove backing locate trim approximately want spray will prevent sticking until have positioned exactly desired Hold position hand take paper towel working middle squeegee spray solution out under trim until bubbles removed Once solution out trim permanently xed. right want Now can spend afternoon finishing up detail items Glue hinges epoxy Mount control horns securely holes pushrod directly over hinge line will ensure equal up down move ment Bend pushrod shape install formed slight Z bend seen photos allows pushrod effectively lengthened shortened sometimes helpful flight trimming Dont forget install pushrod fairlead Du-Bro retainers Use pushrod holes shown plans provide one-to-one control ratio flaps elevators Mount engine photos may see Midwest thrust wedges used provide 30 engine offset items also available Parma Company RC Car department come sets 10 20 3O September 1987 155 T-28 B best scale trainer ever flew Hey Nothing beats RA 4 fun flys yIf1ars Limited Edition ectors Issue Capture action excitement planes pilots years NATS beautiful 14 page full color 12 xl 8 commemorative 1988 calendarl ORDER NOWmonly $995 Before thisLII~ZIIoLShipping & handling LIMITED EDITIONtWJ$2 50 first calendar Collectors Calendar sold ESSIVE IMAGE STUDIOS $100 ea addtl OFFICIAL Photographers AMA NATS 6818 Odana Road Madison WI 53719 608 833-9490 Mount tank connect tubes required choose use uniflow system discussed last month hook up see pictures ie uniflow pipe connected fuse-mounted filler tube overflow tube capped piece ofsealed tubing cap will removed fill tank replaced Final weight modified Twister can anywhere 35 40 oz Mine came out 38 balanced between three-quarters inch forward spot shown plan CG using Merco 40 spinner muffler OS 40 stock muffler choose use longer tail moreforward CG will provide sedate first flight positive line tension Very little wing tip ballast necessary profile since weight engine tank controls outboard centerline forgot cut wing tip remove some ballast would start out add flight tests show necessary pick model up crankshaft tail outboard wing should drop softly ground Betcha does See field Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Scale/Boss Continued page 71 along subject model unit static judging Proper documentation model towing system towed object must provided within specified number pages allowable data Please note rule interpretation personal interpretation Dave has indicated Michacls need further official consideration question Michaels should ask full Scale Contest Board interpretation would like close discussion rules two thoughts First reminder members Scale Contest Board have already cast Final Vote current set rules-change proposals Second have particular section rules believe needs discussion column would too glad hear Something newfrom Bell Rock Industries BRI helps make building easier its Grate-Shapes Weight-Mates GreatShapes series sanding blocks about 10 long number shapes thatwill fit almost model sanding chores silicon carbide grit sanding tools made work surfaces suitable shaping round flat square V concave surfaces offered number sizes shape style sanding tools excellent doing much rough sanding such parts leading trailing edges wings tall surfaces long straight edges word caution offered BRI recommend tools used balsawood foam other soft materials recommended use hard gummy woods metal materials will greatly shorten useful lives Prices Grate-Shapes range $495 set three squares sized $2195 six-pack combination other item mentioned Weight-Mates four- six-inch canvas-like bags filled lead shot sand weigh approx imately five pounds can used hold model parts firmly place during construction bags can also used tie-downs model during transportation bags come five pack sell $695 complete detalls sizes shapes pricing write BRI 6486 Hwy 179Suite 108 Sedona AZ 86336 Contest activity September 20 1987 Garden State Circle Burners GSCB will hosting its annual Bendix/Teterboro Scale rally Precision Sport Profile classes being offered awards form trophies merchandise fifth place event George Gaydos CD hoping years entries wlll surpass 23 last year meet held Bendix Co parking lot adjacent west side Teterboro airport all-blacktop parking lot makes good Scale flying AMA rules apply Precision Sport classes Profile event will flown according GSCBs own rules full contest details copy Profile Scale rules write G Gaydos 8 Dapp Court Elmwood Park NJ 07407 Please send correspondenceespecially photosrelating CL Scale Bill Boss 7706 269th Street New Hyde Park NY 11040 responding advertisers mention read about Model Aviation CL Speed/Hempel Continued page 72 envelope SASE address given end column Another hot item related Speed upcoming -scale NHRA National Hot Rod Association drag-racing funny cars Since Texas hotbed racing activity Southwest full-size racing cars well model cars recently opportunity work some wild little machines speeds attained model cars reach over 100 mph Some technical notes concerning model cars follows frame constructed aircraft-grade tubular steel heli-arc welded rigid built-in roll cage beautiful hand-laid fiberglass body covers frame sold ready paint racing decor centrifugal clutch drive traln permits easy starting engine smooth idling fast acceleration Dual inboard rear disc brakes combined real working drag parachute provide means slowing down after fast run down track several types englnes used cars engine used manufacturer cars months photos Zenoah 140 two-cycle chromed cylinder bore engines have plenty space cylinder experiment port timing engine coupled rear wheels fully enclosed three-stage gearbox Different gear ratios available rear drive axle participation model racing events averages 25 30 entrants weekend race track Its very exciting informa tion mail SASE Discount RYC Hobbies 605 South Sherman St Richardson TX 75081 telephone number 214 669-3705 Gene Hempel 301N YaleDr Garland TX 75042 CL Racing/Ballard Continued page 73 engines will dominant force Nationals since seem overpower almost K&B OS presently existence Slow Rat times averaged under six minutes good first major meet 87 Midwest season Engine modification to K&B 15 am Continued page 158 156 Model Aviation HOBBYPOXY TRUE TM-PART EPOXY PAINTS 16 COLORS R ER EPOXY GLUES FOUR FORMULAS 5-MIN 1V 45-MIN FAST FILL GRAIN FILLER QUICK-PREP POLYESTER RESIN FREE COLOR CARD AND BROCHURE HOWfPOXY DIVISION P116 Pwini Company Inc 36 Pine Sired Rocieway NJ 07666