matornir a. Walt Perkins JE Aibritton L-R super imposed over set strong ultralight shells CL Team Racer fuselage shell halves shown trimmed ready join Theyre made layer Kevlar 350 carbon veilimpregnated Shell EPON 815 epoxy Diethylenetriamine hardener Shot authors taken 1979 team trials such techniques described authors very nearly Team Race World Champions two years ago system constructing using Shadow IV Team Racing fuselage matching molds ideal whenever repeatable lightweight shells high strength wanted U J E Aibritton Walt Perkins 64 Model Aviation SI1ADOT W FUSELAGE MLDS 9 FACE PATE REINFORCING SCREWS HIDDEN G L_r&zW- -~--&N 0 23 BACKING PLATE REINFOB3F3 SCttWS AWNG SLOT PLATEA-A L DA STEEL POD -7---/ / 0 / II 5ASSEMBLY SIDE VIEW AND CROSS SECTIONASSEMBX END VIEW II S MOLD SEPARATION BOLTS / - \0 II DIA STEEL ROD20 BACKING PLATE BE]NEOBCNG SCREWSB -B B i ONE OF THE challenging aspects designing competition model planes rules usually written allow some latitude materials selection and/or construction techniques Con trol Line FAI Team Racing rules precisely define minimum fuselage height width cross section allowing free choice other variable designers racing class choose traditional glassreinforced wood fuselage JE believed could develop stronger lighter fuselage using very thin moldings epoxy-impregnated carbon veil paper Kevlar materiaL summarize five years development first set molds taught us other teams using molded fuselages all-glass shells both heavy fragile second set molds showed strength Kevlar well need split shells vertically Kevlar re inforced carbon filaments allowed us remove internal formers tradi tional hardwood engine mount third set molds opened eyes advantages making very thin shells matching male female molds also leamed two-part molds cannot reinforced wood expected last last set molds subject article incorporates tricks weve leamed date would encourage experimentation should helpful know weve tried four kinds epoxy three styles Kevlar material five styles carbon reinforcement two types glass cloth reinforcement sources everything presently use given end article mold-making techniques described should examined serious modeler has concern light weight high strength application FAL Team Racing takes maximum advantage techniques no minimum weight limit model relatively low absolute strength requirements can easily see applications other kinds models properly designed molded fuselage should have lower polar moment inertia equally strong wood fuselage effect allows model turn about its pitch axis faster speed-related RC events could use advan tage other side coin designer has problem needing strength weight answer Plug full-size plug designed split vertically assembled around engine magnesium engine mount case FAI Team Racer splitting line made spot giuing two i-in balsa formers precisely cut sheet metal template Fill out August1982 65 Main plug horizontal vertical members giueo sogesner snown rianeo oy iauove uno below metal templates used shape balsa eventual shells wont better molds molds wont better plug care needed getting plug just right balance plug appropriately-sizedthen gradually finer grades sandpapersimple doped finish its easy balsa blocks leaving space -in wingUse metal templates necessary ensureallows easy splitting Next split plug slotsymmetry shape Apply favorite finishremove engine mount Fill hole left Carefully shape plug first knife andand polish glass-like surface use aeach half balsa finish too Plug-half glued male mold backing plate coated PVA pic ture female mold face plate place thin coat epoxy resin has applied plug except area around wing slot Cardboard has taped around mold perimeter wing slot plate reinforcing bars placed its ready applying mix Hysol Epoxy Resin 4215 100 parts Hardener 3404 5A parts 66 Model Aviation Two views partially-assembled plug theTeam Racer application plug built around engine engine mountto assure fit mini mum frontal area Authors found typical fiberglass shells heavy brittle compared materials now use pictures fully-assembled balsa plug shaping side top views Joint lines plus added reference marks help achieve symmetry final shaping knife sandpaper shaping tools needed finished plug now ready split has clear-doped sanded polished glass-like surtace Engine mount removed after splitting Holes left filled balsa finished same way set matching male female molds ready use recommend months Safety Comes First tips working epoxy upper cowl section also removed time set aside use windshield form Metal mold part preparation Carefully hand saw appropriate pieces aluminum shown drawing Drill countersink appropriate screw holes two slots re quired aluminum plates wing plate wing access plug should milled place correct alignment accuracy Form dia steel reinforcing bars common con struction steel obtainable hardware stores Drill tap appropriate mold separ ation bolt holes around edge female mold face plates Prior using metal parts thoroughly sand surfaces bonded epoxy degrease entire part grease-cutting solvent use acetone cleaned take precautions avoid contaminating part skin oil Female mold Cover male mold backing plate Mylar packing tape glue appropriate plug-half place cyanoacrylate glue Use modeling clay fill gaps between plate plug-half sharp 900 break way around desired Wipe everything tack rag coat surfaces polyvinylace tate PVA release agent Set aside dry Glue nine edge reinforcing screws female mold face plate Hysol 4215 resin 3404 hardener mixture ratio 100 parts resin 5 parts hardener cured sand face smooth Mix approximately 30 grams Continued page 147 August 1982 67 After resin pour placement female mold backing plate Cleaned-out female mold balsa access plug glued place Female mold balsa access plug covered duct tape First coating resin applied female mold except around top perimeter Note reinforcing bar place male mold epoxy has poured male mold backing plate place perimeter taped contain run-off tissue grain running 900 ribs spanwise no bias could give uneven pull tightens case have never thought much about grain direction tissue try tearing corner sheet see direction tears easiest grain direction Phil Cliffboth recommend plastic ized dopethat dope order Sig Lite Cote nitrate dope few drops plasti cizer such TCP added non-tautening nitrate such Aerodyne willing go lengths prevent warps heres Clifts method nutshell First select C-grain balsa LE. TE. ribs make sure fits nicely stress assemble pinned down board Spray water Cliff suspects ammonia weakens balsa allow 12 hours dry dope structure Aerodyne nitrate dope equiva lent wait another 12 hours Tissue-cover spray water pin down wait overnight before doping Dope tissue 50-50 thinned Aerodyne touch-dry pin back down 24 hours give second coat leave board for48 hours Six hours hot sun still pinned down finishes job Wow det anything warp after treatment Baron Von Keinigrabber Wappingers Falls NY comes tip Scale finish after have made dead-flat wing has success using water-based plastic model paint called Polly-S camouflage streaking DR-I wing well blue undersides Well-thinned says adds almost no weight Earl Van Gorder senior Junior columnist over Fhing Models confirms states further baron would never lie us should now Baron uses Earls address letters Count Alex Pisana comes useful tidbit save wifes snagged pantyhose make great filter material dope enamel prior spraying Before leaving Id like help convince havent yet procured Ron Williams classic Building Flying Indoor Mode/A jrplanes have local bookstore orderone soon wont sorry $1495 Published Simon Schuster Simon Schuster Bldg Rockefeller Center 1230 Avenue Americas New York NY 10020 book contains treasure trove of~ how-to info phases Indoor way building model box larger-than-Peanut Lacey M- 10 scale documentation included Editor Also available AMA members AMA HQ Supply & Service $1050 pictures delight making great gift non-English speakers Williams great modeler superb illustrator Buy Next time well discuss some inter esting ways remove pesky warps models built before learned about McBaine method Bill Warner 423-C San Vicenre Blvd Santa Monica CA 90402 Molds/Al britton- Perkins Continued page 67 Hysol mixturewith exception area right around wing slot Take care doing break through PVA layer Immediately position female mold face plate place gently clamp until resin cures step places gel coat resin plug helps avoid surface bubbles mold resin layer has cured fabricate corrugated cardboard box around edge backing plate Seal seams masking tape Make box high enough contain main resin Position wing slot reinforc ing bars Also place remaining perimeter re inforcing bars place Mix approximately 1400 grams Hysol resin hardener three batches Pour separ ately cavity over plug around wing plate Agitate mold allow air bubbles escape Heating resin gently hair dryer also helps dispel air bubbles Drop female mold backing plate place force down until rests face plate reinforcing screws Some resin should ooze up through reinforcing screw holes around wing plate Push appropriate rein forcing screws through backing plate resin resin has cured remove card board edging male mold backing plate Remove plug carefully breaking up Take care gouge mold surface Soaking assembly water overnight will remove reluctant pieces balsa Clean out small voids mold surface fill Hysol resin mix Prior using sand surfaces lightly 600 wet-or-dry sandpaper polish polishing compound Male mold Shape wing access plug balsa attach wing plate cyano acrylate glue Cover surfaces including wing access plug duct tape Add second layer tape areas additional reinforce ment anticipated case added August1982 147 popular biplane design Designed ZG ~kZ4 aD me. Aeroinaster Too Easytobufld.easytotly. fully a~c. racy good looks trophy winner over 16 years Wingspan 48 52u Wing Area 817864 910 sqin ne 60-78 U Weight 7 lbs Depending confIguration u build ews Aircraft Model Co Box 721 Urbana IL 61801 division Great Planes Model Manufacturing Company MODELIViANIA CER JSESENO NSECI RD DDI1.VrI 12i3399230 NO COLLECT CALLS BETIEEN E 13 & S 14 STS FROR STATEN ISLAND TARE VERRIZMW TO BELT PlOW EAST Y ISLAND AVE EXiT TX AVE N ON TO Ii 3 BLS TO STWE OPEN 1ER4& BED i2 TO 9TPES & Ti4RS 12 TO 545 FRi i2 TO 7 & SAT 10 TO 8 OOiHIGH POiNT PROP/SPIPEER BALANCES PROTECT YISJR ENGINES USE TIE BEST24951995 002000 PRODUCTS PEANA ORIT 2 TYPES FLAT ON RAO1USiFIPE/COURSE SPIT ON BOTH EXTIER OlE8954950 BOY SET FLAT RADIUSSET OF 2895 003D ENGiNES S21 SERVO bE PLUO24951295 AS ABOVE 111TH FUTASA PLUO29951595 004M0EWS TRAIPElOPASTER87952995 005ASBOCIATED 12E R/C CAR 8 CELLBAT LESS BOOT & RADIO128007495 SAVE TiPE PPE YDt ORDER IN2i2 3299250 006 ERJI CLEAN 6 I/S SIZE SIWER ORILL330 255 00785/32 395299 00083/iN470379 009 " 8 7/32 399 010"8 1/4" 530 429 Oil SORI CLEAN 12 1/8 --500 299 1212 5/32 " 800 839 i3123/18 910699 0i4127/32 -1045829 015121/4 899 SEE DUB BEN 101 SPECIAL LIST OVER 150 ANb0FACT1S 016ARC TANITA 4 iBEEL TOYOTA iSPECIAL OFFER iPELLEES BATTERIES AND CIIASOER 25999 R 2 OR i AND SAVE 1000 EACH 24999 2 SAX/ORDER FOR SHIPPING PIWOOES 017BIll AIR CLEAIER FOR ROOT S LASSES CASBS FINE FOR AIRCHAPT225179 AEPLACENENT FILTERS 2/FACE195129 010ZINGER OR TOFFLITE 18 PROPS159199 FOR FASTER SERVICE FIiWE YOI59 ORDER IN 2213399250 ANSTERCARD AND VISA ACCEPTED BEND ALL ORDERS MW IIWUIRES TO BROOILYN BE V4ODAEL lBETNTRSE 13057 DRPAESEAENfl NAECI R0 ESRDDICLVN NV 1 13 ALl PRICES SiJBECT TO OWIDE OFFER BOOD 30Th OF PUB IERITH 1S0ESS CIMNY SiPPLIES ARE ESNAIISTED FREE 101 SPECIALSLIST WITH ORDERS OR SEND BABE ORDERING IWIATIOR SWEY NO COD ALL PRICES INCLUDE 55 CASH DISCOLBIT NIH PET ORBER $15 ONSOiT CASD USERS PLEASE ADD 57 TO TOTAL INCLUDE CASD0 ESFIRSTIOR DATE INTER EME 0 & SIMWTUBE SHIPPINO & *W4G.INO 1500 3000 ADD 430 OVER 3000 ADD 97 MI 15 1030 & 25 LBS ' OWRSIZE BOX ADD $400 WiT OF CONT 115 ADD 155 OF TOTAL FOR SHIPPINO ALL 4IES P057 BE IN US CINCY SALES ARE FINAL ALLOW TIiE FOR PERSONAL CIECKS TO CLEAR NY RESIDENTS RUST ADO APPLICABLE SALES TAX SEND SASE FOR ALL INQUIRES SPECIFY SIZE COLOR MW TYPE IAPERE REQUIRED small Section glass cloth nose area Level tape seams modeling clay coat surfaces PVA Mix 30 grams Hysol resin hardener apply gel coat surfaces except face plate perimeter cured insert re inforcing bars Coatthe five separation bolts silicone grease thread male mold backing plate holes until theyre flush Mix approximately 600 grams Hysol resin hardener pour female mold Agitate mold release air bubbles Position male mold backing plate over wing access plug gently press place Some resin should ooze out through reinforcing screw holes between two mold-halves Cover seam between mold-halves masking tape contain resin Press appropriate reinforcing screws place set aside cure cured remove masking tape break out balsa wing access plug sur rounding duct tape Apply gentle pressure via separation bolts until mold-halves come apart Remove duct tape female mold Clean out clay residue PVA male mold-half Fill small voids Hysol resin sand 600 sandpaper polish Fuselage shelL Wax mold surfaces two times polish Coat mold surfaces PVA get coating may help force-dry PVA hair dryer working small areas until covered theres doubt completeness PVA coverage apply second coat Dont take chances seizing mold Position appropriately cut Kevlar carbon veil paper pieces layer female mold saturate mixture Shell EPON 815 resin DTA hardener mixed ratio 100 parts resin 11 parts hardener Use 30 grams per fuselage half Tack reinforcing glass cloth nose piece place male mold-half join male female mold Place sufficient C-clamps around mold apply pressure Stop clamping firm resistance feW Excess clamping pressure will destroy molds will result thinner shell Clean off much resin molds possible Use facial tissues clean excess resin out wing access hole After letting molds sit room temperature two hours bake oven 175-2000F two hours Remove oven separate mold-halves still warm Its much easier take shell out mold warm Mold maintenance Inspect molds after run correct problems before next use Always wax before run make sure molds have complete PVA coating Clean molds five runs detergent water Sources 2024 aluminum mold plates local metal supply company Flat-head machine bolts -in steel wire hardware store Hysol resin hardenec TMR MatIs 9016 Rosehill Rd Lenexa KS 66215 Tel 913 888-2606 Mold release wax PVA local fiberglass fabricating company Kevlar Style 350 United Plastics Products PO Box 15766 Orlando FL 32858 TeL 305 295-7911 Carbon veil 50 gm/mt2 Union Carbide Corp 270 Park Ave NY NY 10017 Tel Sales 312 454-2000 Shell EPON 815 resin DTA hardener Miller-Stephenson Danbury CT Tel 203 743-4447 CL Aerobatics/Paul Con fin ued page 68 hand rather glued airplane Further become structural members much stop stress cracking wing-fuselage joint Typically glued place either epoxy white glue Large ones can hollowed out Doug continues havent already tried may want test micro balloons something other epoxy example make up paste Titebond microballoons cut Titebond water make paste experience has produced aston ishingly hard fillet Some have added small amounts soft balsa dust micro balloons/Titebond good results have better luck mix Ambroid microballoons thin mix Ijust add dope clear colored fillets made manner should find no problem dope lifting dope sticks well dope Regarding Epoxolite Doug states may worthwhile mention Epoxolite can used least two different ways 1 outside fuselage wing joint 2 inside fuselage wing joint strength strength inside softer MARKV HAND DRILL/WINDER 5 $2800 Plus Freight * HEAVY DIE-CAST NYLON CASE * METAL GEARS * ADJUSTABLE GEAR TOLERANCE * BALL THRUST-BEARING ON SPINDLE ****************** ********* * *AIAMnITrM * **vvtIEJuI *-vr Phi * Dealers Invited * * xliv year iiarranty* * *CORD * * WetorOry * * Stick Abrasines *A Keen Machine' gives exceptional *sanding control excellent finish * *89~ Basic xci 1 flat Wnd 1 * rits *1 O8~ Builder Special mcI 2 flat 1 halt- * und isand 5 eaih S grits *1 29~ Delor inilods 3flat 2half * round niands Ibuffsixdsand *tO Cxx 6 grits * *Additional Wands Abras*esaxaable * poor Ixcal hobby shop *ADD IS ELMORE toe No i2t4 288 5789* * an 266 xite Tenas 75t49 * 148 Model Aviation HOT STUFFM VIDEO-TIPS FREE FOR UP TO 60 DAYS ONE HOUR VHS CASSETTE CLUB MEETINGS HOBBY SHOPS DISTRIBUTORS sORGANIZATIONS $3000 refundable deposit requIred order Send name address phone checkto Satellite City PO Box 836 Simi CA 93062
Edition: Model Aviation - 1982/08
Page Numbers: 64, 65, 66, 67, 147, 148
matornir a. Walt Perkins JE Aibritton L-R super imposed over set strong ultralight shells CL Team Racer fuselage shell halves shown trimmed ready join Theyre made layer Kevlar 350 carbon veilimpregnated Shell EPON 815 epoxy Diethylenetriamine hardener Shot authors taken 1979 team trials such techniques described authors very nearly Team Race World Champions two years ago system constructing using Shadow IV Team Racing fuselage matching molds ideal whenever repeatable lightweight shells high strength wanted U J E Aibritton Walt Perkins 64 Model Aviation SI1ADOT W FUSELAGE MLDS 9 FACE PATE REINFORCING SCREWS HIDDEN G L_r&zW- -~--&N 0 23 BACKING PLATE REINFOB3F3 SCttWS AWNG SLOT PLATEA-A L DA STEEL POD -7---/ / 0 / II 5ASSEMBLY SIDE VIEW AND CROSS SECTIONASSEMBX END VIEW II S MOLD SEPARATION BOLTS / - \0 II DIA STEEL ROD20 BACKING PLATE BE]NEOBCNG SCREWSB -B B i ONE OF THE challenging aspects designing competition model planes rules usually written allow some latitude materials selection and/or construction techniques Con trol Line FAI Team Racing rules precisely define minimum fuselage height width cross section allowing free choice other variable designers racing class choose traditional glassreinforced wood fuselage JE believed could develop stronger lighter fuselage using very thin moldings epoxy-impregnated carbon veil paper Kevlar materiaL summarize five years development first set molds taught us other teams using molded fuselages all-glass shells both heavy fragile second set molds showed strength Kevlar well need split shells vertically Kevlar re inforced carbon filaments allowed us remove internal formers tradi tional hardwood engine mount third set molds opened eyes advantages making very thin shells matching male female molds also leamed two-part molds cannot reinforced wood expected last last set molds subject article incorporates tricks weve leamed date would encourage experimentation should helpful know weve tried four kinds epoxy three styles Kevlar material five styles carbon reinforcement two types glass cloth reinforcement sources everything presently use given end article mold-making techniques described should examined serious modeler has concern light weight high strength application FAL Team Racing takes maximum advantage techniques no minimum weight limit model relatively low absolute strength requirements can easily see applications other kinds models properly designed molded fuselage should have lower polar moment inertia equally strong wood fuselage effect allows model turn about its pitch axis faster speed-related RC events could use advan tage other side coin designer has problem needing strength weight answer Plug full-size plug designed split vertically assembled around engine magnesium engine mount case FAI Team Racer splitting line made spot giuing two i-in balsa formers precisely cut sheet metal template Fill out August1982 65 Main plug horizontal vertical members giueo sogesner snown rianeo oy iauove uno below metal templates used shape balsa eventual shells wont better molds molds wont better plug care needed getting plug just right balance plug appropriately-sizedthen gradually finer grades sandpapersimple doped finish its easy balsa blocks leaving space -in wingUse metal templates necessary ensureallows easy splitting Next split plug slotsymmetry shape Apply favorite finishremove engine mount Fill hole left Carefully shape plug first knife andand polish glass-like surface use aeach half balsa finish too Plug-half glued male mold backing plate coated PVA pic ture female mold face plate place thin coat epoxy resin has applied plug except area around wing slot Cardboard has taped around mold perimeter wing slot plate reinforcing bars placed its ready applying mix Hysol Epoxy Resin 4215 100 parts Hardener 3404 5A parts 66 Model Aviation Two views partially-assembled plug theTeam Racer application plug built around engine engine mountto assure fit mini mum frontal area Authors found typical fiberglass shells heavy brittle compared materials now use pictures fully-assembled balsa plug shaping side top views Joint lines plus added reference marks help achieve symmetry final shaping knife sandpaper shaping tools needed finished plug now ready split has clear-doped sanded polished glass-like surtace Engine mount removed after splitting Holes left filled balsa finished same way set matching male female molds ready use recommend months Safety Comes First tips working epoxy upper cowl section also removed time set aside use windshield form Metal mold part preparation Carefully hand saw appropriate pieces aluminum shown drawing Drill countersink appropriate screw holes two slots re quired aluminum plates wing plate wing access plug should milled place correct alignment accuracy Form dia steel reinforcing bars common con struction steel obtainable hardware stores Drill tap appropriate mold separ ation bolt holes around edge female mold face plates Prior using metal parts thoroughly sand surfaces bonded epoxy degrease entire part grease-cutting solvent use acetone cleaned take precautions avoid contaminating part skin oil Female mold Cover male mold backing plate Mylar packing tape glue appropriate plug-half place cyanoacrylate glue Use modeling clay fill gaps between plate plug-half sharp 900 break way around desired Wipe everything tack rag coat surfaces polyvinylace tate PVA release agent Set aside dry Glue nine edge reinforcing screws female mold face plate Hysol 4215 resin 3404 hardener mixture ratio 100 parts resin 5 parts hardener cured sand face smooth Mix approximately 30 grams Continued page 147 August 1982 67 After resin pour placement female mold backing plate Cleaned-out female mold balsa access plug glued place Female mold balsa access plug covered duct tape First coating resin applied female mold except around top perimeter Note reinforcing bar place male mold epoxy has poured male mold backing plate place perimeter taped contain run-off tissue grain running 900 ribs spanwise no bias could give uneven pull tightens case have never thought much about grain direction tissue try tearing corner sheet see direction tears easiest grain direction Phil Cliffboth recommend plastic ized dopethat dope order Sig Lite Cote nitrate dope few drops plasti cizer such TCP added non-tautening nitrate such Aerodyne willing go lengths prevent warps heres Clifts method nutshell First select C-grain balsa LE. TE. ribs make sure fits nicely stress assemble pinned down board Spray water Cliff suspects ammonia weakens balsa allow 12 hours dry dope structure Aerodyne nitrate dope equiva lent wait another 12 hours Tissue-cover spray water pin down wait overnight before doping Dope tissue 50-50 thinned Aerodyne touch-dry pin back down 24 hours give second coat leave board for48 hours Six hours hot sun still pinned down finishes job Wow det anything warp after treatment Baron Von Keinigrabber Wappingers Falls NY comes tip Scale finish after have made dead-flat wing has success using water-based plastic model paint called Polly-S camouflage streaking DR-I wing well blue undersides Well-thinned says adds almost no weight Earl Van Gorder senior Junior columnist over Fhing Models confirms states further baron would never lie us should now Baron uses Earls address letters Count Alex Pisana comes useful tidbit save wifes snagged pantyhose make great filter material dope enamel prior spraying Before leaving Id like help convince havent yet procured Ron Williams classic Building Flying Indoor Mode/A jrplanes have local bookstore orderone soon wont sorry $1495 Published Simon Schuster Simon Schuster Bldg Rockefeller Center 1230 Avenue Americas New York NY 10020 book contains treasure trove of~ how-to info phases Indoor way building model box larger-than-Peanut Lacey M- 10 scale documentation included Editor Also available AMA members AMA HQ Supply & Service $1050 pictures delight making great gift non-English speakers Williams great modeler superb illustrator Buy Next time well discuss some inter esting ways remove pesky warps models built before learned about McBaine method Bill Warner 423-C San Vicenre Blvd Santa Monica CA 90402 Molds/Al britton- Perkins Continued page 67 Hysol mixturewith exception area right around wing slot Take care doing break through PVA layer Immediately position female mold face plate place gently clamp until resin cures step places gel coat resin plug helps avoid surface bubbles mold resin layer has cured fabricate corrugated cardboard box around edge backing plate Seal seams masking tape Make box high enough contain main resin Position wing slot reinforc ing bars Also place remaining perimeter re inforcing bars place Mix approximately 1400 grams Hysol resin hardener three batches Pour separ ately cavity over plug around wing plate Agitate mold allow air bubbles escape Heating resin gently hair dryer also helps dispel air bubbles Drop female mold backing plate place force down until rests face plate reinforcing screws Some resin should ooze up through reinforcing screw holes around wing plate Push appropriate rein forcing screws through backing plate resin resin has cured remove card board edging male mold backing plate Remove plug carefully breaking up Take care gouge mold surface Soaking assembly water overnight will remove reluctant pieces balsa Clean out small voids mold surface fill Hysol resin mix Prior using sand surfaces lightly 600 wet-or-dry sandpaper polish polishing compound Male mold Shape wing access plug balsa attach wing plate cyano acrylate glue Cover surfaces including wing access plug duct tape Add second layer tape areas additional reinforce ment anticipated case added August1982 147 popular biplane design Designed ZG ~kZ4 aD me. Aeroinaster Too Easytobufld.easytotly. fully a~c. racy good looks trophy winner over 16 years Wingspan 48 52u Wing Area 817864 910 sqin ne 60-78 U Weight 7 lbs Depending confIguration u build ews Aircraft Model Co Box 721 Urbana IL 61801 division Great Planes Model Manufacturing Company MODELIViANIA CER JSESENO NSECI RD DDI1.VrI 12i3399230 NO COLLECT CALLS BETIEEN E 13 & S 14 STS FROR STATEN ISLAND TARE VERRIZMW TO BELT PlOW EAST Y ISLAND AVE EXiT TX AVE N ON TO Ii 3 BLS TO STWE OPEN 1ER4& BED i2 TO 9TPES & Ti4RS 12 TO 545 FRi i2 TO 7 & SAT 10 TO 8 OOiHIGH POiNT PROP/SPIPEER BALANCES PROTECT YISJR ENGINES USE TIE BEST24951995 002000 PRODUCTS PEANA ORIT 2 TYPES FLAT ON RAO1USiFIPE/COURSE SPIT ON BOTH EXTIER OlE8954950 BOY SET FLAT RADIUSSET OF 2895 003D ENGiNES S21 SERVO bE PLUO24951295 AS ABOVE 111TH FUTASA PLUO29951595 004M0EWS TRAIPElOPASTER87952995 005ASBOCIATED 12E R/C CAR 8 CELLBAT LESS BOOT & RADIO128007495 SAVE TiPE PPE YDt ORDER IN2i2 3299250 006 ERJI CLEAN 6 I/S SIZE SIWER ORILL330 255 00785/32 395299 00083/iN470379 009 " 8 7/32 399 010"8 1/4" 530 429 Oil SORI CLEAN 12 1/8 --500 299 1212 5/32 " 800 839 i3123/18 910699 0i4127/32 -1045829 015121/4 899 SEE DUB BEN 101 SPECIAL LIST OVER 150 ANb0FACT1S 016ARC TANITA 4 iBEEL TOYOTA iSPECIAL OFFER iPELLEES BATTERIES AND CIIASOER 25999 R 2 OR i AND SAVE 1000 EACH 24999 2 SAX/ORDER FOR SHIPPING PIWOOES 017BIll AIR CLEAIER FOR ROOT S LASSES CASBS FINE FOR AIRCHAPT225179 AEPLACENENT FILTERS 2/FACE195129 010ZINGER OR TOFFLITE 18 PROPS159199 FOR FASTER SERVICE FIiWE YOI59 ORDER IN 2213399250 ANSTERCARD AND VISA ACCEPTED BEND ALL ORDERS MW IIWUIRES TO BROOILYN BE V4ODAEL lBETNTRSE 13057 DRPAESEAENfl NAECI R0 ESRDDICLVN NV 1 13 ALl PRICES SiJBECT TO OWIDE OFFER BOOD 30Th OF PUB IERITH 1S0ESS CIMNY SiPPLIES ARE ESNAIISTED FREE 101 SPECIALSLIST WITH ORDERS OR SEND BABE ORDERING IWIATIOR SWEY NO COD ALL PRICES INCLUDE 55 CASH DISCOLBIT NIH PET ORBER $15 ONSOiT CASD USERS PLEASE ADD 57 TO TOTAL INCLUDE CASD0 ESFIRSTIOR DATE INTER EME 0 & SIMWTUBE SHIPPINO & *W4G.INO 1500 3000 ADD 430 OVER 3000 ADD 97 MI 15 1030 & 25 LBS ' OWRSIZE BOX ADD $400 WiT OF CONT 115 ADD 155 OF TOTAL FOR SHIPPINO ALL 4IES P057 BE IN US CINCY SALES ARE FINAL ALLOW TIiE FOR PERSONAL CIECKS TO CLEAR NY RESIDENTS RUST ADO APPLICABLE SALES TAX SEND SASE FOR ALL INQUIRES SPECIFY SIZE COLOR MW TYPE IAPERE REQUIRED small Section glass cloth nose area Level tape seams modeling clay coat surfaces PVA Mix 30 grams Hysol resin hardener apply gel coat surfaces except face plate perimeter cured insert re inforcing bars Coatthe five separation bolts silicone grease thread male mold backing plate holes until theyre flush Mix approximately 600 grams Hysol resin hardener pour female mold Agitate mold release air bubbles Position male mold backing plate over wing access plug gently press place Some resin should ooze out through reinforcing screw holes between two mold-halves Cover seam between mold-halves masking tape contain resin Press appropriate reinforcing screws place set aside cure cured remove masking tape break out balsa wing access plug sur rounding duct tape Apply gentle pressure via separation bolts until mold-halves come apart Remove duct tape female mold Clean out clay residue PVA male mold-half Fill small voids Hysol resin sand 600 sandpaper polish Fuselage shelL Wax mold surfaces two times polish Coat mold surfaces PVA get coating may help force-dry PVA hair dryer working small areas until covered theres doubt completeness PVA coverage apply second coat Dont take chances seizing mold Position appropriately cut Kevlar carbon veil paper pieces layer female mold saturate mixture Shell EPON 815 resin DTA hardener mixed ratio 100 parts resin 11 parts hardener Use 30 grams per fuselage half Tack reinforcing glass cloth nose piece place male mold-half join male female mold Place sufficient C-clamps around mold apply pressure Stop clamping firm resistance feW Excess clamping pressure will destroy molds will result thinner shell Clean off much resin molds possible Use facial tissues clean excess resin out wing access hole After letting molds sit room temperature two hours bake oven 175-2000F two hours Remove oven separate mold-halves still warm Its much easier take shell out mold warm Mold maintenance Inspect molds after run correct problems before next use Always wax before run make sure molds have complete PVA coating Clean molds five runs detergent water Sources 2024 aluminum mold plates local metal supply company Flat-head machine bolts -in steel wire hardware store Hysol resin hardenec TMR MatIs 9016 Rosehill Rd Lenexa KS 66215 Tel 913 888-2606 Mold release wax PVA local fiberglass fabricating company Kevlar Style 350 United Plastics Products PO Box 15766 Orlando FL 32858 TeL 305 295-7911 Carbon veil 50 gm/mt2 Union Carbide Corp 270 Park Ave NY NY 10017 Tel Sales 312 454-2000 Shell EPON 815 resin DTA hardener Miller-Stephenson Danbury CT Tel 203 743-4447 CL Aerobatics/Paul Con fin ued page 68 hand rather glued airplane Further become structural members much stop stress cracking wing-fuselage joint Typically glued place either epoxy white glue Large ones can hollowed out Doug continues havent already tried may want test micro balloons something other epoxy example make up paste Titebond microballoons cut Titebond water make paste experience has produced aston ishingly hard fillet Some have added small amounts soft balsa dust micro balloons/Titebond good results have better luck mix Ambroid microballoons thin mix Ijust add dope clear colored fillets made manner should find no problem dope lifting dope sticks well dope Regarding Epoxolite Doug states may worthwhile mention Epoxolite can used least two different ways 1 outside fuselage wing joint 2 inside fuselage wing joint strength strength inside softer MARKV HAND DRILL/WINDER 5 $2800 Plus Freight * HEAVY DIE-CAST NYLON CASE * METAL GEARS * ADJUSTABLE GEAR TOLERANCE * BALL THRUST-BEARING ON SPINDLE ****************** ********* * *AIAMnITrM * **vvtIEJuI *-vr Phi * Dealers Invited * * xliv year iiarranty* * *CORD * * WetorOry * * Stick Abrasines *A Keen Machine' gives exceptional *sanding control excellent finish * *89~ Basic xci 1 flat Wnd 1 * rits *1 O8~ Builder Special mcI 2 flat 1 halt- * und isand 5 eaih S grits *1 29~ Delor inilods 3flat 2half * round niands Ibuffsixdsand *tO Cxx 6 grits * *Additional Wands Abras*esaxaable * poor Ixcal hobby shop *ADD IS ELMORE toe No i2t4 288 5789* * an 266 xite Tenas 75t49 * 148 Model Aviation HOT STUFFM VIDEO-TIPS FREE FOR UP TO 60 DAYS ONE HOUR VHS CASSETTE CLUB MEETINGS HOBBY SHOPS DISTRIBUTORS sORGANIZATIONS $3000 refundable deposit requIred order Send name address phone checkto Satellite City PO Box 836 Simi CA 93062
Edition: Model Aviation - 1982/08
Page Numbers: 64, 65, 66, 67, 147, 148
matornir a. Walt Perkins JE Aibritton L-R super imposed over set strong ultralight shells CL Team Racer fuselage shell halves shown trimmed ready join Theyre made layer Kevlar 350 carbon veilimpregnated Shell EPON 815 epoxy Diethylenetriamine hardener Shot authors taken 1979 team trials such techniques described authors very nearly Team Race World Champions two years ago system constructing using Shadow IV Team Racing fuselage matching molds ideal whenever repeatable lightweight shells high strength wanted U J E Aibritton Walt Perkins 64 Model Aviation SI1ADOT W FUSELAGE MLDS 9 FACE PATE REINFORCING SCREWS HIDDEN G L_r&zW- -~--&N 0 23 BACKING PLATE REINFOB3F3 SCttWS AWNG SLOT PLATEA-A L DA STEEL POD -7---/ / 0 / II 5ASSEMBLY SIDE VIEW AND CROSS SECTIONASSEMBX END VIEW II S MOLD SEPARATION BOLTS / - \0 II DIA STEEL ROD20 BACKING PLATE BE]NEOBCNG SCREWSB -B B i ONE OF THE challenging aspects designing competition model planes rules usually written allow some latitude materials selection and/or construction techniques Con trol Line FAI Team Racing rules precisely define minimum fuselage height width cross section allowing free choice other variable designers racing class choose traditional glassreinforced wood fuselage JE believed could develop stronger lighter fuselage using very thin moldings epoxy-impregnated carbon veil paper Kevlar materiaL summarize five years development first set molds taught us other teams using molded fuselages all-glass shells both heavy fragile second set molds showed strength Kevlar well need split shells vertically Kevlar re inforced carbon filaments allowed us remove internal formers tradi tional hardwood engine mount third set molds opened eyes advantages making very thin shells matching male female molds also leamed two-part molds cannot reinforced wood expected last last set molds subject article incorporates tricks weve leamed date would encourage experimentation should helpful know weve tried four kinds epoxy three styles Kevlar material five styles carbon reinforcement two types glass cloth reinforcement sources everything presently use given end article mold-making techniques described should examined serious modeler has concern light weight high strength application FAL Team Racing takes maximum advantage techniques no minimum weight limit model relatively low absolute strength requirements can easily see applications other kinds models properly designed molded fuselage should have lower polar moment inertia equally strong wood fuselage effect allows model turn about its pitch axis faster speed-related RC events could use advan tage other side coin designer has problem needing strength weight answer Plug full-size plug designed split vertically assembled around engine magnesium engine mount case FAI Team Racer splitting line made spot giuing two i-in balsa formers precisely cut sheet metal template Fill out August1982 65 Main plug horizontal vertical members giueo sogesner snown rianeo oy iauove uno below metal templates used shape balsa eventual shells wont better molds molds wont better plug care needed getting plug just right balance plug appropriately-sizedthen gradually finer grades sandpapersimple doped finish its easy balsa blocks leaving space -in wingUse metal templates necessary ensureallows easy splitting Next split plug slotsymmetry shape Apply favorite finishremove engine mount Fill hole left Carefully shape plug first knife andand polish glass-like surface use aeach half balsa finish too Plug-half glued male mold backing plate coated PVA pic ture female mold face plate place thin coat epoxy resin has applied plug except area around wing slot Cardboard has taped around mold perimeter wing slot plate reinforcing bars placed its ready applying mix Hysol Epoxy Resin 4215 100 parts Hardener 3404 5A parts 66 Model Aviation Two views partially-assembled plug theTeam Racer application plug built around engine engine mountto assure fit mini mum frontal area Authors found typical fiberglass shells heavy brittle compared materials now use pictures fully-assembled balsa plug shaping side top views Joint lines plus added reference marks help achieve symmetry final shaping knife sandpaper shaping tools needed finished plug now ready split has clear-doped sanded polished glass-like surtace Engine mount removed after splitting Holes left filled balsa finished same way set matching male female molds ready use recommend months Safety Comes First tips working epoxy upper cowl section also removed time set aside use windshield form Metal mold part preparation Carefully hand saw appropriate pieces aluminum shown drawing Drill countersink appropriate screw holes two slots re quired aluminum plates wing plate wing access plug should milled place correct alignment accuracy Form dia steel reinforcing bars common con struction steel obtainable hardware stores Drill tap appropriate mold separ ation bolt holes around edge female mold face plates Prior using metal parts thoroughly sand surfaces bonded epoxy degrease entire part grease-cutting solvent use acetone cleaned take precautions avoid contaminating part skin oil Female mold Cover male mold backing plate Mylar packing tape glue appropriate plug-half place cyanoacrylate glue Use modeling clay fill gaps between plate plug-half sharp 900 break way around desired Wipe everything tack rag coat surfaces polyvinylace tate PVA release agent Set aside dry Glue nine edge reinforcing screws female mold face plate Hysol 4215 resin 3404 hardener mixture ratio 100 parts resin 5 parts hardener cured sand face smooth Mix approximately 30 grams Continued page 147 August 1982 67 After resin pour placement female mold backing plate Cleaned-out female mold balsa access plug glued place Female mold balsa access plug covered duct tape First coating resin applied female mold except around top perimeter Note reinforcing bar place male mold epoxy has poured male mold backing plate place perimeter taped contain run-off tissue grain running 900 ribs spanwise no bias could give uneven pull tightens case have never thought much about grain direction tissue try tearing corner sheet see direction tears easiest grain direction Phil Cliffboth recommend plastic ized dopethat dope order Sig Lite Cote nitrate dope few drops plasti cizer such TCP added non-tautening nitrate such Aerodyne willing go lengths prevent warps heres Clifts method nutshell First select C-grain balsa LE. TE. ribs make sure fits nicely stress assemble pinned down board Spray water Cliff suspects ammonia weakens balsa allow 12 hours dry dope structure Aerodyne nitrate dope equiva lent wait another 12 hours Tissue-cover spray water pin down wait overnight before doping Dope tissue 50-50 thinned Aerodyne touch-dry pin back down 24 hours give second coat leave board for48 hours Six hours hot sun still pinned down finishes job Wow det anything warp after treatment Baron Von Keinigrabber Wappingers Falls NY comes tip Scale finish after have made dead-flat wing has success using water-based plastic model paint called Polly-S camouflage streaking DR-I wing well blue undersides Well-thinned says adds almost no weight Earl Van Gorder senior Junior columnist over Fhing Models confirms states further baron would never lie us should now Baron uses Earls address letters Count Alex Pisana comes useful tidbit save wifes snagged pantyhose make great filter material dope enamel prior spraying Before leaving Id like help convince havent yet procured Ron Williams classic Building Flying Indoor Mode/A jrplanes have local bookstore orderone soon wont sorry $1495 Published Simon Schuster Simon Schuster Bldg Rockefeller Center 1230 Avenue Americas New York NY 10020 book contains treasure trove of~ how-to info phases Indoor way building model box larger-than-Peanut Lacey M- 10 scale documentation included Editor Also available AMA members AMA HQ Supply & Service $1050 pictures delight making great gift non-English speakers Williams great modeler superb illustrator Buy Next time well discuss some inter esting ways remove pesky warps models built before learned about McBaine method Bill Warner 423-C San Vicenre Blvd Santa Monica CA 90402 Molds/Al britton- Perkins Continued page 67 Hysol mixturewith exception area right around wing slot Take care doing break through PVA layer Immediately position female mold face plate place gently clamp until resin cures step places gel coat resin plug helps avoid surface bubbles mold resin layer has cured fabricate corrugated cardboard box around edge backing plate Seal seams masking tape Make box high enough contain main resin Position wing slot reinforc ing bars Also place remaining perimeter re inforcing bars place Mix approximately 1400 grams Hysol resin hardener three batches Pour separ ately cavity over plug around wing plate Agitate mold allow air bubbles escape Heating resin gently hair dryer also helps dispel air bubbles Drop female mold backing plate place force down until rests face plate reinforcing screws Some resin should ooze up through reinforcing screw holes around wing plate Push appropriate rein forcing screws through backing plate resin resin has cured remove card board edging male mold backing plate Remove plug carefully breaking up Take care gouge mold surface Soaking assembly water overnight will remove reluctant pieces balsa Clean out small voids mold surface fill Hysol resin mix Prior using sand surfaces lightly 600 wet-or-dry sandpaper polish polishing compound Male mold Shape wing access plug balsa attach wing plate cyano acrylate glue Cover surfaces including wing access plug duct tape Add second layer tape areas additional reinforce ment anticipated case added August1982 147 popular biplane design Designed ZG ~kZ4 aD me. Aeroinaster Too Easytobufld.easytotly. fully a~c. racy good looks trophy winner over 16 years Wingspan 48 52u Wing Area 817864 910 sqin ne 60-78 U Weight 7 lbs Depending confIguration u build ews Aircraft Model Co Box 721 Urbana IL 61801 division Great Planes Model Manufacturing Company MODELIViANIA CER JSESENO NSECI RD DDI1.VrI 12i3399230 NO COLLECT CALLS BETIEEN E 13 & S 14 STS FROR STATEN ISLAND TARE VERRIZMW TO BELT PlOW EAST Y ISLAND AVE EXiT TX AVE N ON TO Ii 3 BLS TO STWE OPEN 1ER4& BED i2 TO 9TPES & Ti4RS 12 TO 545 FRi i2 TO 7 & SAT 10 TO 8 OOiHIGH POiNT PROP/SPIPEER BALANCES PROTECT YISJR ENGINES USE TIE BEST24951995 002000 PRODUCTS PEANA ORIT 2 TYPES FLAT ON RAO1USiFIPE/COURSE SPIT ON BOTH EXTIER OlE8954950 BOY SET FLAT RADIUSSET OF 2895 003D ENGiNES S21 SERVO bE PLUO24951295 AS ABOVE 111TH FUTASA PLUO29951595 004M0EWS TRAIPElOPASTER87952995 005ASBOCIATED 12E R/C CAR 8 CELLBAT LESS BOOT & RADIO128007495 SAVE TiPE PPE YDt ORDER IN2i2 3299250 006 ERJI CLEAN 6 I/S SIZE SIWER ORILL330 255 00785/32 395299 00083/iN470379 009 " 8 7/32 399 010"8 1/4" 530 429 Oil SORI CLEAN 12 1/8 --500 299 1212 5/32 " 800 839 i3123/18 910699 0i4127/32 -1045829 015121/4 899 SEE DUB BEN 101 SPECIAL LIST OVER 150 ANb0FACT1S 016ARC TANITA 4 iBEEL TOYOTA iSPECIAL OFFER iPELLEES BATTERIES AND CIIASOER 25999 R 2 OR i AND SAVE 1000 EACH 24999 2 SAX/ORDER FOR SHIPPING PIWOOES 017BIll AIR CLEAIER FOR ROOT S LASSES CASBS FINE FOR AIRCHAPT225179 AEPLACENENT FILTERS 2/FACE195129 010ZINGER OR TOFFLITE 18 PROPS159199 FOR FASTER SERVICE FIiWE YOI59 ORDER IN 2213399250 ANSTERCARD AND VISA ACCEPTED BEND ALL ORDERS MW IIWUIRES TO BROOILYN BE V4ODAEL lBETNTRSE 13057 DRPAESEAENfl NAECI R0 ESRDDICLVN NV 1 13 ALl PRICES SiJBECT TO OWIDE OFFER BOOD 30Th OF PUB IERITH 1S0ESS CIMNY SiPPLIES ARE ESNAIISTED FREE 101 SPECIALSLIST WITH ORDERS OR SEND BABE ORDERING IWIATIOR SWEY NO COD ALL PRICES INCLUDE 55 CASH DISCOLBIT NIH PET ORBER $15 ONSOiT CASD USERS PLEASE ADD 57 TO TOTAL INCLUDE CASD0 ESFIRSTIOR DATE INTER EME 0 & SIMWTUBE SHIPPINO & *W4G.INO 1500 3000 ADD 430 OVER 3000 ADD 97 MI 15 1030 & 25 LBS ' OWRSIZE BOX ADD $400 WiT OF CONT 115 ADD 155 OF TOTAL FOR SHIPPINO ALL 4IES P057 BE IN US CINCY SALES ARE FINAL ALLOW TIiE FOR PERSONAL CIECKS TO CLEAR NY RESIDENTS RUST ADO APPLICABLE SALES TAX SEND SASE FOR ALL INQUIRES SPECIFY SIZE COLOR MW TYPE IAPERE REQUIRED small Section glass cloth nose area Level tape seams modeling clay coat surfaces PVA Mix 30 grams Hysol resin hardener apply gel coat surfaces except face plate perimeter cured insert re inforcing bars Coatthe five separation bolts silicone grease thread male mold backing plate holes until theyre flush Mix approximately 600 grams Hysol resin hardener pour female mold Agitate mold release air bubbles Position male mold backing plate over wing access plug gently press place Some resin should ooze out through reinforcing screw holes between two mold-halves Cover seam between mold-halves masking tape contain resin Press appropriate reinforcing screws place set aside cure cured remove masking tape break out balsa wing access plug sur rounding duct tape Apply gentle pressure via separation bolts until mold-halves come apart Remove duct tape female mold Clean out clay residue PVA male mold-half Fill small voids Hysol resin sand 600 sandpaper polish Fuselage shelL Wax mold surfaces two times polish Coat mold surfaces PVA get coating may help force-dry PVA hair dryer working small areas until covered theres doubt completeness PVA coverage apply second coat Dont take chances seizing mold Position appropriately cut Kevlar carbon veil paper pieces layer female mold saturate mixture Shell EPON 815 resin DTA hardener mixed ratio 100 parts resin 11 parts hardener Use 30 grams per fuselage half Tack reinforcing glass cloth nose piece place male mold-half join male female mold Place sufficient C-clamps around mold apply pressure Stop clamping firm resistance feW Excess clamping pressure will destroy molds will result thinner shell Clean off much resin molds possible Use facial tissues clean excess resin out wing access hole After letting molds sit room temperature two hours bake oven 175-2000F two hours Remove oven separate mold-halves still warm Its much easier take shell out mold warm Mold maintenance Inspect molds after run correct problems before next use Always wax before run make sure molds have complete PVA coating Clean molds five runs detergent water Sources 2024 aluminum mold plates local metal supply company Flat-head machine bolts -in steel wire hardware store Hysol resin hardenec TMR MatIs 9016 Rosehill Rd Lenexa KS 66215 Tel 913 888-2606 Mold release wax PVA local fiberglass fabricating company Kevlar Style 350 United Plastics Products PO Box 15766 Orlando FL 32858 TeL 305 295-7911 Carbon veil 50 gm/mt2 Union Carbide Corp 270 Park Ave NY NY 10017 Tel Sales 312 454-2000 Shell EPON 815 resin DTA hardener Miller-Stephenson Danbury CT Tel 203 743-4447 CL Aerobatics/Paul Con fin ued page 68 hand rather glued airplane Further become structural members much stop stress cracking wing-fuselage joint Typically glued place either epoxy white glue Large ones can hollowed out Doug continues havent already tried may want test micro balloons something other epoxy example make up paste Titebond microballoons cut Titebond water make paste experience has produced aston ishingly hard fillet Some have added small amounts soft balsa dust micro balloons/Titebond good results have better luck mix Ambroid microballoons thin mix Ijust add dope clear colored fillets made manner should find no problem dope lifting dope sticks well dope Regarding Epoxolite Doug states may worthwhile mention Epoxolite can used least two different ways 1 outside fuselage wing joint 2 inside fuselage wing joint strength strength inside softer MARKV HAND DRILL/WINDER 5 $2800 Plus Freight * HEAVY DIE-CAST NYLON CASE * METAL GEARS * ADJUSTABLE GEAR TOLERANCE * BALL THRUST-BEARING ON SPINDLE ****************** ********* * *AIAMnITrM * **vvtIEJuI *-vr Phi * Dealers Invited * * xliv year iiarranty* * *CORD * * WetorOry * * Stick Abrasines *A Keen Machine' gives exceptional *sanding control excellent finish * *89~ Basic xci 1 flat Wnd 1 * rits *1 O8~ Builder Special mcI 2 flat 1 halt- * und isand 5 eaih S grits *1 29~ Delor inilods 3flat 2half * round niands Ibuffsixdsand *tO Cxx 6 grits * *Additional Wands Abras*esaxaable * poor Ixcal hobby shop *ADD IS ELMORE toe No i2t4 288 5789* * an 266 xite Tenas 75t49 * 148 Model Aviation HOT STUFFM VIDEO-TIPS FREE FOR UP TO 60 DAYS ONE HOUR VHS CASSETTE CLUB MEETINGS HOBBY SHOPS DISTRIBUTORS sORGANIZATIONS $3000 refundable deposit requIred order Send name address phone checkto Satellite City PO Box 836 Simi CA 93062
Edition: Model Aviation - 1982/08
Page Numbers: 64, 65, 66, 67, 147, 148
matornir a. Walt Perkins JE Aibritton L-R super imposed over set strong ultralight shells CL Team Racer fuselage shell halves shown trimmed ready join Theyre made layer Kevlar 350 carbon veilimpregnated Shell EPON 815 epoxy Diethylenetriamine hardener Shot authors taken 1979 team trials such techniques described authors very nearly Team Race World Champions two years ago system constructing using Shadow IV Team Racing fuselage matching molds ideal whenever repeatable lightweight shells high strength wanted U J E Aibritton Walt Perkins 64 Model Aviation SI1ADOT W FUSELAGE MLDS 9 FACE PATE REINFORCING SCREWS HIDDEN G L_r&zW- -~--&N 0 23 BACKING PLATE REINFOB3F3 SCttWS AWNG SLOT PLATEA-A L DA STEEL POD -7---/ / 0 / II 5ASSEMBLY SIDE VIEW AND CROSS SECTIONASSEMBX END VIEW II S MOLD SEPARATION BOLTS / - \0 II DIA STEEL ROD20 BACKING PLATE BE]NEOBCNG SCREWSB -B B i ONE OF THE challenging aspects designing competition model planes rules usually written allow some latitude materials selection and/or construction techniques Con trol Line FAI Team Racing rules precisely define minimum fuselage height width cross section allowing free choice other variable designers racing class choose traditional glassreinforced wood fuselage JE believed could develop stronger lighter fuselage using very thin moldings epoxy-impregnated carbon veil paper Kevlar materiaL summarize five years development first set molds taught us other teams using molded fuselages all-glass shells both heavy fragile second set molds showed strength Kevlar well need split shells vertically Kevlar re inforced carbon filaments allowed us remove internal formers tradi tional hardwood engine mount third set molds opened eyes advantages making very thin shells matching male female molds also leamed two-part molds cannot reinforced wood expected last last set molds subject article incorporates tricks weve leamed date would encourage experimentation should helpful know weve tried four kinds epoxy three styles Kevlar material five styles carbon reinforcement two types glass cloth reinforcement sources everything presently use given end article mold-making techniques described should examined serious modeler has concern light weight high strength application FAL Team Racing takes maximum advantage techniques no minimum weight limit model relatively low absolute strength requirements can easily see applications other kinds models properly designed molded fuselage should have lower polar moment inertia equally strong wood fuselage effect allows model turn about its pitch axis faster speed-related RC events could use advan tage other side coin designer has problem needing strength weight answer Plug full-size plug designed split vertically assembled around engine magnesium engine mount case FAI Team Racer splitting line made spot giuing two i-in balsa formers precisely cut sheet metal template Fill out August1982 65 Main plug horizontal vertical members giueo sogesner snown rianeo oy iauove uno below metal templates used shape balsa eventual shells wont better molds molds wont better plug care needed getting plug just right balance plug appropriately-sizedthen gradually finer grades sandpapersimple doped finish its easy balsa blocks leaving space -in wingUse metal templates necessary ensureallows easy splitting Next split plug slotsymmetry shape Apply favorite finishremove engine mount Fill hole left Carefully shape plug first knife andand polish glass-like surface use aeach half balsa finish too Plug-half glued male mold backing plate coated PVA pic ture female mold face plate place thin coat epoxy resin has applied plug except area around wing slot Cardboard has taped around mold perimeter wing slot plate reinforcing bars placed its ready applying mix Hysol Epoxy Resin 4215 100 parts Hardener 3404 5A parts 66 Model Aviation Two views partially-assembled plug theTeam Racer application plug built around engine engine mountto assure fit mini mum frontal area Authors found typical fiberglass shells heavy brittle compared materials now use pictures fully-assembled balsa plug shaping side top views Joint lines plus added reference marks help achieve symmetry final shaping knife sandpaper shaping tools needed finished plug now ready split has clear-doped sanded polished glass-like surtace Engine mount removed after splitting Holes left filled balsa finished same way set matching male female molds ready use recommend months Safety Comes First tips working epoxy upper cowl section also removed time set aside use windshield form Metal mold part preparation Carefully hand saw appropriate pieces aluminum shown drawing Drill countersink appropriate screw holes two slots re quired aluminum plates wing plate wing access plug should milled place correct alignment accuracy Form dia steel reinforcing bars common con struction steel obtainable hardware stores Drill tap appropriate mold separ ation bolt holes around edge female mold face plates Prior using metal parts thoroughly sand surfaces bonded epoxy degrease entire part grease-cutting solvent use acetone cleaned take precautions avoid contaminating part skin oil Female mold Cover male mold backing plate Mylar packing tape glue appropriate plug-half place cyanoacrylate glue Use modeling clay fill gaps between plate plug-half sharp 900 break way around desired Wipe everything tack rag coat surfaces polyvinylace tate PVA release agent Set aside dry Glue nine edge reinforcing screws female mold face plate Hysol 4215 resin 3404 hardener mixture ratio 100 parts resin 5 parts hardener cured sand face smooth Mix approximately 30 grams Continued page 147 August 1982 67 After resin pour placement female mold backing plate Cleaned-out female mold balsa access plug glued place Female mold balsa access plug covered duct tape First coating resin applied female mold except around top perimeter Note reinforcing bar place male mold epoxy has poured male mold backing plate place perimeter taped contain run-off tissue grain running 900 ribs spanwise no bias could give uneven pull tightens case have never thought much about grain direction tissue try tearing corner sheet see direction tears easiest grain direction Phil Cliffboth recommend plastic ized dopethat dope order Sig Lite Cote nitrate dope few drops plasti cizer such TCP added non-tautening nitrate such Aerodyne willing go lengths prevent warps heres Clifts method nutshell First select C-grain balsa LE. TE. ribs make sure fits nicely stress assemble pinned down board Spray water Cliff suspects ammonia weakens balsa allow 12 hours dry dope structure Aerodyne nitrate dope equiva lent wait another 12 hours Tissue-cover spray water pin down wait overnight before doping Dope tissue 50-50 thinned Aerodyne touch-dry pin back down 24 hours give second coat leave board for48 hours Six hours hot sun still pinned down finishes job Wow det anything warp after treatment Baron Von Keinigrabber Wappingers Falls NY comes tip Scale finish after have made dead-flat wing has success using water-based plastic model paint called Polly-S camouflage streaking DR-I wing well blue undersides Well-thinned says adds almost no weight Earl Van Gorder senior Junior columnist over Fhing Models confirms states further baron would never lie us should now Baron uses Earls address letters Count Alex Pisana comes useful tidbit save wifes snagged pantyhose make great filter material dope enamel prior spraying Before leaving Id like help convince havent yet procured Ron Williams classic Building Flying Indoor Mode/A jrplanes have local bookstore orderone soon wont sorry $1495 Published Simon Schuster Simon Schuster Bldg Rockefeller Center 1230 Avenue Americas New York NY 10020 book contains treasure trove of~ how-to info phases Indoor way building model box larger-than-Peanut Lacey M- 10 scale documentation included Editor Also available AMA members AMA HQ Supply & Service $1050 pictures delight making great gift non-English speakers Williams great modeler superb illustrator Buy Next time well discuss some inter esting ways remove pesky warps models built before learned about McBaine method Bill Warner 423-C San Vicenre Blvd Santa Monica CA 90402 Molds/Al britton- Perkins Continued page 67 Hysol mixturewith exception area right around wing slot Take care doing break through PVA layer Immediately position female mold face plate place gently clamp until resin cures step places gel coat resin plug helps avoid surface bubbles mold resin layer has cured fabricate corrugated cardboard box around edge backing plate Seal seams masking tape Make box high enough contain main resin Position wing slot reinforc ing bars Also place remaining perimeter re inforcing bars place Mix approximately 1400 grams Hysol resin hardener three batches Pour separ ately cavity over plug around wing plate Agitate mold allow air bubbles escape Heating resin gently hair dryer also helps dispel air bubbles Drop female mold backing plate place force down until rests face plate reinforcing screws Some resin should ooze up through reinforcing screw holes around wing plate Push appropriate rein forcing screws through backing plate resin resin has cured remove card board edging male mold backing plate Remove plug carefully breaking up Take care gouge mold surface Soaking assembly water overnight will remove reluctant pieces balsa Clean out small voids mold surface fill Hysol resin mix Prior using sand surfaces lightly 600 wet-or-dry sandpaper polish polishing compound Male mold Shape wing access plug balsa attach wing plate cyano acrylate glue Cover surfaces including wing access plug duct tape Add second layer tape areas additional reinforce ment anticipated case added August1982 147 popular biplane design Designed ZG ~kZ4 aD me. Aeroinaster Too Easytobufld.easytotly. fully a~c. racy good looks trophy winner over 16 years Wingspan 48 52u Wing Area 817864 910 sqin ne 60-78 U Weight 7 lbs Depending confIguration u build ews Aircraft Model Co Box 721 Urbana IL 61801 division Great Planes Model Manufacturing Company MODELIViANIA CER JSESENO NSECI RD DDI1.VrI 12i3399230 NO COLLECT CALLS BETIEEN E 13 & S 14 STS FROR STATEN ISLAND TARE VERRIZMW TO BELT PlOW EAST Y ISLAND AVE EXiT TX AVE N ON TO Ii 3 BLS TO STWE OPEN 1ER4& BED i2 TO 9TPES & Ti4RS 12 TO 545 FRi i2 TO 7 & SAT 10 TO 8 OOiHIGH POiNT PROP/SPIPEER BALANCES PROTECT YISJR ENGINES USE TIE BEST24951995 002000 PRODUCTS PEANA ORIT 2 TYPES FLAT ON RAO1USiFIPE/COURSE SPIT ON BOTH EXTIER OlE8954950 BOY SET FLAT RADIUSSET OF 2895 003D ENGiNES S21 SERVO bE PLUO24951295 AS ABOVE 111TH FUTASA PLUO29951595 004M0EWS TRAIPElOPASTER87952995 005ASBOCIATED 12E R/C CAR 8 CELLBAT LESS BOOT & RADIO128007495 SAVE TiPE PPE YDt ORDER IN2i2 3299250 006 ERJI CLEAN 6 I/S SIZE SIWER ORILL330 255 00785/32 395299 00083/iN470379 009 " 8 7/32 399 010"8 1/4" 530 429 Oil SORI CLEAN 12 1/8 --500 299 1212 5/32 " 800 839 i3123/18 910699 0i4127/32 -1045829 015121/4 899 SEE DUB BEN 101 SPECIAL LIST OVER 150 ANb0FACT1S 016ARC TANITA 4 iBEEL TOYOTA iSPECIAL OFFER iPELLEES BATTERIES AND CIIASOER 25999 R 2 OR i AND SAVE 1000 EACH 24999 2 SAX/ORDER FOR SHIPPING PIWOOES 017BIll AIR CLEAIER FOR ROOT S LASSES CASBS FINE FOR AIRCHAPT225179 AEPLACENENT FILTERS 2/FACE195129 010ZINGER OR TOFFLITE 18 PROPS159199 FOR FASTER SERVICE FIiWE YOI59 ORDER IN 2213399250 ANSTERCARD AND VISA ACCEPTED BEND ALL ORDERS MW IIWUIRES TO BROOILYN BE V4ODAEL lBETNTRSE 13057 DRPAESEAENfl NAECI R0 ESRDDICLVN NV 1 13 ALl PRICES SiJBECT TO OWIDE OFFER BOOD 30Th OF PUB IERITH 1S0ESS CIMNY SiPPLIES ARE ESNAIISTED FREE 101 SPECIALSLIST WITH ORDERS OR SEND BABE ORDERING IWIATIOR SWEY NO COD ALL PRICES INCLUDE 55 CASH DISCOLBIT NIH PET ORBER $15 ONSOiT CASD USERS PLEASE ADD 57 TO TOTAL INCLUDE CASD0 ESFIRSTIOR DATE INTER EME 0 & SIMWTUBE SHIPPINO & *W4G.INO 1500 3000 ADD 430 OVER 3000 ADD 97 MI 15 1030 & 25 LBS ' OWRSIZE BOX ADD $400 WiT OF CONT 115 ADD 155 OF TOTAL FOR SHIPPINO ALL 4IES P057 BE IN US CINCY SALES ARE FINAL ALLOW TIiE FOR PERSONAL CIECKS TO CLEAR NY RESIDENTS RUST ADO APPLICABLE SALES TAX SEND SASE FOR ALL INQUIRES SPECIFY SIZE COLOR MW TYPE IAPERE REQUIRED small Section glass cloth nose area Level tape seams modeling clay coat surfaces PVA Mix 30 grams Hysol resin hardener apply gel coat surfaces except face plate perimeter cured insert re inforcing bars Coatthe five separation bolts silicone grease thread male mold backing plate holes until theyre flush Mix approximately 600 grams Hysol resin hardener pour female mold Agitate mold release air bubbles Position male mold backing plate over wing access plug gently press place Some resin should ooze out through reinforcing screw holes between two mold-halves Cover seam between mold-halves masking tape contain resin Press appropriate reinforcing screws place set aside cure cured remove masking tape break out balsa wing access plug sur rounding duct tape Apply gentle pressure via separation bolts until mold-halves come apart Remove duct tape female mold Clean out clay residue PVA male mold-half Fill small voids Hysol resin sand 600 sandpaper polish Fuselage shelL Wax mold surfaces two times polish Coat mold surfaces PVA get coating may help force-dry PVA hair dryer working small areas until covered theres doubt completeness PVA coverage apply second coat Dont take chances seizing mold Position appropriately cut Kevlar carbon veil paper pieces layer female mold saturate mixture Shell EPON 815 resin DTA hardener mixed ratio 100 parts resin 11 parts hardener Use 30 grams per fuselage half Tack reinforcing glass cloth nose piece place male mold-half join male female mold Place sufficient C-clamps around mold apply pressure Stop clamping firm resistance feW Excess clamping pressure will destroy molds will result thinner shell Clean off much resin molds possible Use facial tissues clean excess resin out wing access hole After letting molds sit room temperature two hours bake oven 175-2000F two hours Remove oven separate mold-halves still warm Its much easier take shell out mold warm Mold maintenance Inspect molds after run correct problems before next use Always wax before run make sure molds have complete PVA coating Clean molds five runs detergent water Sources 2024 aluminum mold plates local metal supply company Flat-head machine bolts -in steel wire hardware store Hysol resin hardenec TMR MatIs 9016 Rosehill Rd Lenexa KS 66215 Tel 913 888-2606 Mold release wax PVA local fiberglass fabricating company Kevlar Style 350 United Plastics Products PO Box 15766 Orlando FL 32858 TeL 305 295-7911 Carbon veil 50 gm/mt2 Union Carbide Corp 270 Park Ave NY NY 10017 Tel Sales 312 454-2000 Shell EPON 815 resin DTA hardener Miller-Stephenson Danbury CT Tel 203 743-4447 CL Aerobatics/Paul Con fin ued page 68 hand rather glued airplane Further become structural members much stop stress cracking wing-fuselage joint Typically glued place either epoxy white glue Large ones can hollowed out Doug continues havent already tried may want test micro balloons something other epoxy example make up paste Titebond microballoons cut Titebond water make paste experience has produced aston ishingly hard fillet Some have added small amounts soft balsa dust micro balloons/Titebond good results have better luck mix Ambroid microballoons thin mix Ijust add dope clear colored fillets made manner should find no problem dope lifting dope sticks well dope Regarding Epoxolite Doug states may worthwhile mention Epoxolite can used least two different ways 1 outside fuselage wing joint 2 inside fuselage wing joint strength strength inside softer MARKV HAND DRILL/WINDER 5 $2800 Plus Freight * HEAVY DIE-CAST NYLON CASE * METAL GEARS * ADJUSTABLE GEAR TOLERANCE * BALL THRUST-BEARING ON SPINDLE ****************** ********* * *AIAMnITrM * **vvtIEJuI *-vr Phi * Dealers Invited * * xliv year iiarranty* * *CORD * * WetorOry * * Stick Abrasines *A Keen Machine' gives exceptional *sanding control excellent finish * *89~ Basic xci 1 flat Wnd 1 * rits *1 O8~ Builder Special mcI 2 flat 1 halt- * und isand 5 eaih S grits *1 29~ Delor inilods 3flat 2half * round niands Ibuffsixdsand *tO Cxx 6 grits * *Additional Wands Abras*esaxaable * poor Ixcal hobby shop *ADD IS ELMORE toe No i2t4 288 5789* * an 266 xite Tenas 75t49 * 148 Model Aviation HOT STUFFM VIDEO-TIPS FREE FOR UP TO 60 DAYS ONE HOUR VHS CASSETTE CLUB MEETINGS HOBBY SHOPS DISTRIBUTORS sORGANIZATIONS $3000 refundable deposit requIred order Send name address phone checkto Satellite City PO Box 836 Simi CA 93062
Edition: Model Aviation - 1982/08
Page Numbers: 64, 65, 66, 67, 147, 148
matornir a. Walt Perkins JE Aibritton L-R super imposed over set strong ultralight shells CL Team Racer fuselage shell halves shown trimmed ready join Theyre made layer Kevlar 350 carbon veilimpregnated Shell EPON 815 epoxy Diethylenetriamine hardener Shot authors taken 1979 team trials such techniques described authors very nearly Team Race World Champions two years ago system constructing using Shadow IV Team Racing fuselage matching molds ideal whenever repeatable lightweight shells high strength wanted U J E Aibritton Walt Perkins 64 Model Aviation SI1ADOT W FUSELAGE MLDS 9 FACE PATE REINFORCING SCREWS HIDDEN G L_r&zW- -~--&N 0 23 BACKING PLATE REINFOB3F3 SCttWS AWNG SLOT PLATEA-A L DA STEEL POD -7---/ / 0 / II 5ASSEMBLY SIDE VIEW AND CROSS SECTIONASSEMBX END VIEW II S MOLD SEPARATION BOLTS / - \0 II DIA STEEL ROD20 BACKING PLATE BE]NEOBCNG SCREWSB -B B i ONE OF THE challenging aspects designing competition model planes rules usually written allow some latitude materials selection and/or construction techniques Con trol Line FAI Team Racing rules precisely define minimum fuselage height width cross section allowing free choice other variable designers racing class choose traditional glassreinforced wood fuselage JE believed could develop stronger lighter fuselage using very thin moldings epoxy-impregnated carbon veil paper Kevlar materiaL summarize five years development first set molds taught us other teams using molded fuselages all-glass shells both heavy fragile second set molds showed strength Kevlar well need split shells vertically Kevlar re inforced carbon filaments allowed us remove internal formers tradi tional hardwood engine mount third set molds opened eyes advantages making very thin shells matching male female molds also leamed two-part molds cannot reinforced wood expected last last set molds subject article incorporates tricks weve leamed date would encourage experimentation should helpful know weve tried four kinds epoxy three styles Kevlar material five styles carbon reinforcement two types glass cloth reinforcement sources everything presently use given end article mold-making techniques described should examined serious modeler has concern light weight high strength application FAL Team Racing takes maximum advantage techniques no minimum weight limit model relatively low absolute strength requirements can easily see applications other kinds models properly designed molded fuselage should have lower polar moment inertia equally strong wood fuselage effect allows model turn about its pitch axis faster speed-related RC events could use advan tage other side coin designer has problem needing strength weight answer Plug full-size plug designed split vertically assembled around engine magnesium engine mount case FAI Team Racer splitting line made spot giuing two i-in balsa formers precisely cut sheet metal template Fill out August1982 65 Main plug horizontal vertical members giueo sogesner snown rianeo oy iauove uno below metal templates used shape balsa eventual shells wont better molds molds wont better plug care needed getting plug just right balance plug appropriately-sizedthen gradually finer grades sandpapersimple doped finish its easy balsa blocks leaving space -in wingUse metal templates necessary ensureallows easy splitting Next split plug slotsymmetry shape Apply favorite finishremove engine mount Fill hole left Carefully shape plug first knife andand polish glass-like surface use aeach half balsa finish too Plug-half glued male mold backing plate coated PVA pic ture female mold face plate place thin coat epoxy resin has applied plug except area around wing slot Cardboard has taped around mold perimeter wing slot plate reinforcing bars placed its ready applying mix Hysol Epoxy Resin 4215 100 parts Hardener 3404 5A parts 66 Model Aviation Two views partially-assembled plug theTeam Racer application plug built around engine engine mountto assure fit mini mum frontal area Authors found typical fiberglass shells heavy brittle compared materials now use pictures fully-assembled balsa plug shaping side top views Joint lines plus added reference marks help achieve symmetry final shaping knife sandpaper shaping tools needed finished plug now ready split has clear-doped sanded polished glass-like surtace Engine mount removed after splitting Holes left filled balsa finished same way set matching male female molds ready use recommend months Safety Comes First tips working epoxy upper cowl section also removed time set aside use windshield form Metal mold part preparation Carefully hand saw appropriate pieces aluminum shown drawing Drill countersink appropriate screw holes two slots re quired aluminum plates wing plate wing access plug should milled place correct alignment accuracy Form dia steel reinforcing bars common con struction steel obtainable hardware stores Drill tap appropriate mold separ ation bolt holes around edge female mold face plates Prior using metal parts thoroughly sand surfaces bonded epoxy degrease entire part grease-cutting solvent use acetone cleaned take precautions avoid contaminating part skin oil Female mold Cover male mold backing plate Mylar packing tape glue appropriate plug-half place cyanoacrylate glue Use modeling clay fill gaps between plate plug-half sharp 900 break way around desired Wipe everything tack rag coat surfaces polyvinylace tate PVA release agent Set aside dry Glue nine edge reinforcing screws female mold face plate Hysol 4215 resin 3404 hardener mixture ratio 100 parts resin 5 parts hardener cured sand face smooth Mix approximately 30 grams Continued page 147 August 1982 67 After resin pour placement female mold backing plate Cleaned-out female mold balsa access plug glued place Female mold balsa access plug covered duct tape First coating resin applied female mold except around top perimeter Note reinforcing bar place male mold epoxy has poured male mold backing plate place perimeter taped contain run-off tissue grain running 900 ribs spanwise no bias could give uneven pull tightens case have never thought much about grain direction tissue try tearing corner sheet see direction tears easiest grain direction Phil Cliffboth recommend plastic ized dopethat dope order Sig Lite Cote nitrate dope few drops plasti cizer such TCP added non-tautening nitrate such Aerodyne willing go lengths prevent warps heres Clifts method nutshell First select C-grain balsa LE. TE. ribs make sure fits nicely stress assemble pinned down board Spray water Cliff suspects ammonia weakens balsa allow 12 hours dry dope structure Aerodyne nitrate dope equiva lent wait another 12 hours Tissue-cover spray water pin down wait overnight before doping Dope tissue 50-50 thinned Aerodyne touch-dry pin back down 24 hours give second coat leave board for48 hours Six hours hot sun still pinned down finishes job Wow det anything warp after treatment Baron Von Keinigrabber Wappingers Falls NY comes tip Scale finish after have made dead-flat wing has success using water-based plastic model paint called Polly-S camouflage streaking DR-I wing well blue undersides Well-thinned says adds almost no weight Earl Van Gorder senior Junior columnist over Fhing Models confirms states further baron would never lie us should now Baron uses Earls address letters Count Alex Pisana comes useful tidbit save wifes snagged pantyhose make great filter material dope enamel prior spraying Before leaving Id like help convince havent yet procured Ron Williams classic Building Flying Indoor Mode/A jrplanes have local bookstore orderone soon wont sorry $1495 Published Simon Schuster Simon Schuster Bldg Rockefeller Center 1230 Avenue Americas New York NY 10020 book contains treasure trove of~ how-to info phases Indoor way building model box larger-than-Peanut Lacey M- 10 scale documentation included Editor Also available AMA members AMA HQ Supply & Service $1050 pictures delight making great gift non-English speakers Williams great modeler superb illustrator Buy Next time well discuss some inter esting ways remove pesky warps models built before learned about McBaine method Bill Warner 423-C San Vicenre Blvd Santa Monica CA 90402 Molds/Al britton- Perkins Continued page 67 Hysol mixturewith exception area right around wing slot Take care doing break through PVA layer Immediately position female mold face plate place gently clamp until resin cures step places gel coat resin plug helps avoid surface bubbles mold resin layer has cured fabricate corrugated cardboard box around edge backing plate Seal seams masking tape Make box high enough contain main resin Position wing slot reinforc ing bars Also place remaining perimeter re inforcing bars place Mix approximately 1400 grams Hysol resin hardener three batches Pour separ ately cavity over plug around wing plate Agitate mold allow air bubbles escape Heating resin gently hair dryer also helps dispel air bubbles Drop female mold backing plate place force down until rests face plate reinforcing screws Some resin should ooze up through reinforcing screw holes around wing plate Push appropriate rein forcing screws through backing plate resin resin has cured remove card board edging male mold backing plate Remove plug carefully breaking up Take care gouge mold surface Soaking assembly water overnight will remove reluctant pieces balsa Clean out small voids mold surface fill Hysol resin mix Prior using sand surfaces lightly 600 wet-or-dry sandpaper polish polishing compound Male mold Shape wing access plug balsa attach wing plate cyano acrylate glue Cover surfaces including wing access plug duct tape Add second layer tape areas additional reinforce ment anticipated case added August1982 147 popular biplane design Designed ZG ~kZ4 aD me. Aeroinaster Too Easytobufld.easytotly. fully a~c. racy good looks trophy winner over 16 years Wingspan 48 52u Wing Area 817864 910 sqin ne 60-78 U Weight 7 lbs Depending confIguration u build ews Aircraft Model Co Box 721 Urbana IL 61801 division Great Planes Model Manufacturing Company MODELIViANIA CER JSESENO NSECI RD DDI1.VrI 12i3399230 NO COLLECT CALLS BETIEEN E 13 & S 14 STS FROR STATEN ISLAND TARE VERRIZMW TO BELT PlOW EAST Y ISLAND AVE EXiT TX AVE N ON TO Ii 3 BLS TO STWE OPEN 1ER4& BED i2 TO 9TPES & Ti4RS 12 TO 545 FRi i2 TO 7 & SAT 10 TO 8 OOiHIGH POiNT PROP/SPIPEER BALANCES PROTECT YISJR ENGINES USE TIE BEST24951995 002000 PRODUCTS PEANA ORIT 2 TYPES FLAT ON RAO1USiFIPE/COURSE SPIT ON BOTH EXTIER OlE8954950 BOY SET FLAT RADIUSSET OF 2895 003D ENGiNES S21 SERVO bE PLUO24951295 AS ABOVE 111TH FUTASA PLUO29951595 004M0EWS TRAIPElOPASTER87952995 005ASBOCIATED 12E R/C CAR 8 CELLBAT LESS BOOT & RADIO128007495 SAVE TiPE PPE YDt ORDER IN2i2 3299250 006 ERJI CLEAN 6 I/S SIZE SIWER ORILL330 255 00785/32 395299 00083/iN470379 009 " 8 7/32 399 010"8 1/4" 530 429 Oil SORI CLEAN 12 1/8 --500 299 1212 5/32 " 800 839 i3123/18 910699 0i4127/32 -1045829 015121/4 899 SEE DUB BEN 101 SPECIAL LIST OVER 150 ANb0FACT1S 016ARC TANITA 4 iBEEL TOYOTA iSPECIAL OFFER iPELLEES BATTERIES AND CIIASOER 25999 R 2 OR i AND SAVE 1000 EACH 24999 2 SAX/ORDER FOR SHIPPING PIWOOES 017BIll AIR CLEAIER FOR ROOT S LASSES CASBS FINE FOR AIRCHAPT225179 AEPLACENENT FILTERS 2/FACE195129 010ZINGER OR TOFFLITE 18 PROPS159199 FOR FASTER SERVICE FIiWE YOI59 ORDER IN 2213399250 ANSTERCARD AND VISA ACCEPTED BEND ALL ORDERS MW IIWUIRES TO BROOILYN BE V4ODAEL lBETNTRSE 13057 DRPAESEAENfl NAECI R0 ESRDDICLVN NV 1 13 ALl PRICES SiJBECT TO OWIDE OFFER BOOD 30Th OF PUB IERITH 1S0ESS CIMNY SiPPLIES ARE ESNAIISTED FREE 101 SPECIALSLIST WITH ORDERS OR SEND BABE ORDERING IWIATIOR SWEY NO COD ALL PRICES INCLUDE 55 CASH DISCOLBIT NIH PET ORBER $15 ONSOiT CASD USERS PLEASE ADD 57 TO TOTAL INCLUDE CASD0 ESFIRSTIOR DATE INTER EME 0 & SIMWTUBE SHIPPINO & *W4G.INO 1500 3000 ADD 430 OVER 3000 ADD 97 MI 15 1030 & 25 LBS ' OWRSIZE BOX ADD $400 WiT OF CONT 115 ADD 155 OF TOTAL FOR SHIPPINO ALL 4IES P057 BE IN US CINCY SALES ARE FINAL ALLOW TIiE FOR PERSONAL CIECKS TO CLEAR NY RESIDENTS RUST ADO APPLICABLE SALES TAX SEND SASE FOR ALL INQUIRES SPECIFY SIZE COLOR MW TYPE IAPERE REQUIRED small Section glass cloth nose area Level tape seams modeling clay coat surfaces PVA Mix 30 grams Hysol resin hardener apply gel coat surfaces except face plate perimeter cured insert re inforcing bars Coatthe five separation bolts silicone grease thread male mold backing plate holes until theyre flush Mix approximately 600 grams Hysol resin hardener pour female mold Agitate mold release air bubbles Position male mold backing plate over wing access plug gently press place Some resin should ooze out through reinforcing screw holes between two mold-halves Cover seam between mold-halves masking tape contain resin Press appropriate reinforcing screws place set aside cure cured remove masking tape break out balsa wing access plug sur rounding duct tape Apply gentle pressure via separation bolts until mold-halves come apart Remove duct tape female mold Clean out clay residue PVA male mold-half Fill small voids Hysol resin sand 600 sandpaper polish Fuselage shelL Wax mold surfaces two times polish Coat mold surfaces PVA get coating may help force-dry PVA hair dryer working small areas until covered theres doubt completeness PVA coverage apply second coat Dont take chances seizing mold Position appropriately cut Kevlar carbon veil paper pieces layer female mold saturate mixture Shell EPON 815 resin DTA hardener mixed ratio 100 parts resin 11 parts hardener Use 30 grams per fuselage half Tack reinforcing glass cloth nose piece place male mold-half join male female mold Place sufficient C-clamps around mold apply pressure Stop clamping firm resistance feW Excess clamping pressure will destroy molds will result thinner shell Clean off much resin molds possible Use facial tissues clean excess resin out wing access hole After letting molds sit room temperature two hours bake oven 175-2000F two hours Remove oven separate mold-halves still warm Its much easier take shell out mold warm Mold maintenance Inspect molds after run correct problems before next use Always wax before run make sure molds have complete PVA coating Clean molds five runs detergent water Sources 2024 aluminum mold plates local metal supply company Flat-head machine bolts -in steel wire hardware store Hysol resin hardenec TMR MatIs 9016 Rosehill Rd Lenexa KS 66215 Tel 913 888-2606 Mold release wax PVA local fiberglass fabricating company Kevlar Style 350 United Plastics Products PO Box 15766 Orlando FL 32858 TeL 305 295-7911 Carbon veil 50 gm/mt2 Union Carbide Corp 270 Park Ave NY NY 10017 Tel Sales 312 454-2000 Shell EPON 815 resin DTA hardener Miller-Stephenson Danbury CT Tel 203 743-4447 CL Aerobatics/Paul Con fin ued page 68 hand rather glued airplane Further become structural members much stop stress cracking wing-fuselage joint Typically glued place either epoxy white glue Large ones can hollowed out Doug continues havent already tried may want test micro balloons something other epoxy example make up paste Titebond microballoons cut Titebond water make paste experience has produced aston ishingly hard fillet Some have added small amounts soft balsa dust micro balloons/Titebond good results have better luck mix Ambroid microballoons thin mix Ijust add dope clear colored fillets made manner should find no problem dope lifting dope sticks well dope Regarding Epoxolite Doug states may worthwhile mention Epoxolite can used least two different ways 1 outside fuselage wing joint 2 inside fuselage wing joint strength strength inside softer MARKV HAND DRILL/WINDER 5 $2800 Plus Freight * HEAVY DIE-CAST NYLON CASE * METAL GEARS * ADJUSTABLE GEAR TOLERANCE * BALL THRUST-BEARING ON SPINDLE ****************** ********* * *AIAMnITrM * **vvtIEJuI *-vr Phi * Dealers Invited * * xliv year iiarranty* * *CORD * * WetorOry * * Stick Abrasines *A Keen Machine' gives exceptional *sanding control excellent finish * *89~ Basic xci 1 flat Wnd 1 * rits *1 O8~ Builder Special mcI 2 flat 1 halt- * und isand 5 eaih S grits *1 29~ Delor inilods 3flat 2half * round niands Ibuffsixdsand *tO Cxx 6 grits * *Additional Wands Abras*esaxaable * poor Ixcal hobby shop *ADD IS ELMORE toe No i2t4 288 5789* * an 266 xite Tenas 75t49 * 148 Model Aviation HOT STUFFM VIDEO-TIPS FREE FOR UP TO 60 DAYS ONE HOUR VHS CASSETTE CLUB MEETINGS HOBBY SHOPS DISTRIBUTORS sORGANIZATIONS $3000 refundable deposit requIred order Send name address phone checkto Satellite City PO Box 836 Simi CA 93062
Edition: Model Aviation - 1982/08
Page Numbers: 64, 65, 66, 67, 147, 148
matornir a. Walt Perkins JE Aibritton L-R super imposed over set strong ultralight shells CL Team Racer fuselage shell halves shown trimmed ready join Theyre made layer Kevlar 350 carbon veilimpregnated Shell EPON 815 epoxy Diethylenetriamine hardener Shot authors taken 1979 team trials such techniques described authors very nearly Team Race World Champions two years ago system constructing using Shadow IV Team Racing fuselage matching molds ideal whenever repeatable lightweight shells high strength wanted U J E Aibritton Walt Perkins 64 Model Aviation SI1ADOT W FUSELAGE MLDS 9 FACE PATE REINFORCING SCREWS HIDDEN G L_r&zW- -~--&N 0 23 BACKING PLATE REINFOB3F3 SCttWS AWNG SLOT PLATEA-A L DA STEEL POD -7---/ / 0 / II 5ASSEMBLY SIDE VIEW AND CROSS SECTIONASSEMBX END VIEW II S MOLD SEPARATION BOLTS / - \0 II DIA STEEL ROD20 BACKING PLATE BE]NEOBCNG SCREWSB -B B i ONE OF THE challenging aspects designing competition model planes rules usually written allow some latitude materials selection and/or construction techniques Con trol Line FAI Team Racing rules precisely define minimum fuselage height width cross section allowing free choice other variable designers racing class choose traditional glassreinforced wood fuselage JE believed could develop stronger lighter fuselage using very thin moldings epoxy-impregnated carbon veil paper Kevlar materiaL summarize five years development first set molds taught us other teams using molded fuselages all-glass shells both heavy fragile second set molds showed strength Kevlar well need split shells vertically Kevlar re inforced carbon filaments allowed us remove internal formers tradi tional hardwood engine mount third set molds opened eyes advantages making very thin shells matching male female molds also leamed two-part molds cannot reinforced wood expected last last set molds subject article incorporates tricks weve leamed date would encourage experimentation should helpful know weve tried four kinds epoxy three styles Kevlar material five styles carbon reinforcement two types glass cloth reinforcement sources everything presently use given end article mold-making techniques described should examined serious modeler has concern light weight high strength application FAL Team Racing takes maximum advantage techniques no minimum weight limit model relatively low absolute strength requirements can easily see applications other kinds models properly designed molded fuselage should have lower polar moment inertia equally strong wood fuselage effect allows model turn about its pitch axis faster speed-related RC events could use advan tage other side coin designer has problem needing strength weight answer Plug full-size plug designed split vertically assembled around engine magnesium engine mount case FAI Team Racer splitting line made spot giuing two i-in balsa formers precisely cut sheet metal template Fill out August1982 65 Main plug horizontal vertical members giueo sogesner snown rianeo oy iauove uno below metal templates used shape balsa eventual shells wont better molds molds wont better plug care needed getting plug just right balance plug appropriately-sizedthen gradually finer grades sandpapersimple doped finish its easy balsa blocks leaving space -in wingUse metal templates necessary ensureallows easy splitting Next split plug slotsymmetry shape Apply favorite finishremove engine mount Fill hole left Carefully shape plug first knife andand polish glass-like surface use aeach half balsa finish too Plug-half glued male mold backing plate coated PVA pic ture female mold face plate place thin coat epoxy resin has applied plug except area around wing slot Cardboard has taped around mold perimeter wing slot plate reinforcing bars placed its ready applying mix Hysol Epoxy Resin 4215 100 parts Hardener 3404 5A parts 66 Model Aviation Two views partially-assembled plug theTeam Racer application plug built around engine engine mountto assure fit mini mum frontal area Authors found typical fiberglass shells heavy brittle compared materials now use pictures fully-assembled balsa plug shaping side top views Joint lines plus added reference marks help achieve symmetry final shaping knife sandpaper shaping tools needed finished plug now ready split has clear-doped sanded polished glass-like surtace Engine mount removed after splitting Holes left filled balsa finished same way set matching male female molds ready use recommend months Safety Comes First tips working epoxy upper cowl section also removed time set aside use windshield form Metal mold part preparation Carefully hand saw appropriate pieces aluminum shown drawing Drill countersink appropriate screw holes two slots re quired aluminum plates wing plate wing access plug should milled place correct alignment accuracy Form dia steel reinforcing bars common con struction steel obtainable hardware stores Drill tap appropriate mold separ ation bolt holes around edge female mold face plates Prior using metal parts thoroughly sand surfaces bonded epoxy degrease entire part grease-cutting solvent use acetone cleaned take precautions avoid contaminating part skin oil Female mold Cover male mold backing plate Mylar packing tape glue appropriate plug-half place cyanoacrylate glue Use modeling clay fill gaps between plate plug-half sharp 900 break way around desired Wipe everything tack rag coat surfaces polyvinylace tate PVA release agent Set aside dry Glue nine edge reinforcing screws female mold face plate Hysol 4215 resin 3404 hardener mixture ratio 100 parts resin 5 parts hardener cured sand face smooth Mix approximately 30 grams Continued page 147 August 1982 67 After resin pour placement female mold backing plate Cleaned-out female mold balsa access plug glued place Female mold balsa access plug covered duct tape First coating resin applied female mold except around top perimeter Note reinforcing bar place male mold epoxy has poured male mold backing plate place perimeter taped contain run-off tissue grain running 900 ribs spanwise no bias could give uneven pull tightens case have never thought much about grain direction tissue try tearing corner sheet see direction tears easiest grain direction Phil Cliffboth recommend plastic ized dopethat dope order Sig Lite Cote nitrate dope few drops plasti cizer such TCP added non-tautening nitrate such Aerodyne willing go lengths prevent warps heres Clifts method nutshell First select C-grain balsa LE. TE. ribs make sure fits nicely stress assemble pinned down board Spray water Cliff suspects ammonia weakens balsa allow 12 hours dry dope structure Aerodyne nitrate dope equiva lent wait another 12 hours Tissue-cover spray water pin down wait overnight before doping Dope tissue 50-50 thinned Aerodyne touch-dry pin back down 24 hours give second coat leave board for48 hours Six hours hot sun still pinned down finishes job Wow det anything warp after treatment Baron Von Keinigrabber Wappingers Falls NY comes tip Scale finish after have made dead-flat wing has success using water-based plastic model paint called Polly-S camouflage streaking DR-I wing well blue undersides Well-thinned says adds almost no weight Earl Van Gorder senior Junior columnist over Fhing Models confirms states further baron would never lie us should now Baron uses Earls address letters Count Alex Pisana comes useful tidbit save wifes snagged pantyhose make great filter material dope enamel prior spraying Before leaving Id like help convince havent yet procured Ron Williams classic Building Flying Indoor Mode/A jrplanes have local bookstore orderone soon wont sorry $1495 Published Simon Schuster Simon Schuster Bldg Rockefeller Center 1230 Avenue Americas New York NY 10020 book contains treasure trove of~ how-to info phases Indoor way building model box larger-than-Peanut Lacey M- 10 scale documentation included Editor Also available AMA members AMA HQ Supply & Service $1050 pictures delight making great gift non-English speakers Williams great modeler superb illustrator Buy Next time well discuss some inter esting ways remove pesky warps models built before learned about McBaine method Bill Warner 423-C San Vicenre Blvd Santa Monica CA 90402 Molds/Al britton- Perkins Continued page 67 Hysol mixturewith exception area right around wing slot Take care doing break through PVA layer Immediately position female mold face plate place gently clamp until resin cures step places gel coat resin plug helps avoid surface bubbles mold resin layer has cured fabricate corrugated cardboard box around edge backing plate Seal seams masking tape Make box high enough contain main resin Position wing slot reinforc ing bars Also place remaining perimeter re inforcing bars place Mix approximately 1400 grams Hysol resin hardener three batches Pour separ ately cavity over plug around wing plate Agitate mold allow air bubbles escape Heating resin gently hair dryer also helps dispel air bubbles Drop female mold backing plate place force down until rests face plate reinforcing screws Some resin should ooze up through reinforcing screw holes around wing plate Push appropriate rein forcing screws through backing plate resin resin has cured remove card board edging male mold backing plate Remove plug carefully breaking up Take care gouge mold surface Soaking assembly water overnight will remove reluctant pieces balsa Clean out small voids mold surface fill Hysol resin mix Prior using sand surfaces lightly 600 wet-or-dry sandpaper polish polishing compound Male mold Shape wing access plug balsa attach wing plate cyano acrylate glue Cover surfaces including wing access plug duct tape Add second layer tape areas additional reinforce ment anticipated case added August1982 147 popular biplane design Designed ZG ~kZ4 aD me. Aeroinaster Too Easytobufld.easytotly. fully a~c. racy good looks trophy winner over 16 years Wingspan 48 52u Wing Area 817864 910 sqin ne 60-78 U Weight 7 lbs Depending confIguration u build ews Aircraft Model Co Box 721 Urbana IL 61801 division Great Planes Model Manufacturing Company MODELIViANIA CER JSESENO NSECI RD DDI1.VrI 12i3399230 NO COLLECT CALLS BETIEEN E 13 & S 14 STS FROR STATEN ISLAND TARE VERRIZMW TO BELT PlOW EAST Y ISLAND AVE EXiT TX AVE N ON TO Ii 3 BLS TO STWE OPEN 1ER4& BED i2 TO 9TPES & Ti4RS 12 TO 545 FRi i2 TO 7 & SAT 10 TO 8 OOiHIGH POiNT PROP/SPIPEER BALANCES PROTECT YISJR ENGINES USE TIE BEST24951995 002000 PRODUCTS PEANA ORIT 2 TYPES FLAT ON RAO1USiFIPE/COURSE SPIT ON BOTH EXTIER OlE8954950 BOY SET FLAT RADIUSSET OF 2895 003D ENGiNES S21 SERVO bE PLUO24951295 AS ABOVE 111TH FUTASA PLUO29951595 004M0EWS TRAIPElOPASTER87952995 005ASBOCIATED 12E R/C CAR 8 CELLBAT LESS BOOT & RADIO128007495 SAVE TiPE PPE YDt ORDER IN2i2 3299250 006 ERJI CLEAN 6 I/S SIZE SIWER ORILL330 255 00785/32 395299 00083/iN470379 009 " 8 7/32 399 010"8 1/4" 530 429 Oil SORI CLEAN 12 1/8 --500 299 1212 5/32 " 800 839 i3123/18 910699 0i4127/32 -1045829 015121/4 899 SEE DUB BEN 101 SPECIAL LIST OVER 150 ANb0FACT1S 016ARC TANITA 4 iBEEL TOYOTA iSPECIAL OFFER iPELLEES BATTERIES AND CIIASOER 25999 R 2 OR i AND SAVE 1000 EACH 24999 2 SAX/ORDER FOR SHIPPING PIWOOES 017BIll AIR CLEAIER FOR ROOT S LASSES CASBS FINE FOR AIRCHAPT225179 AEPLACENENT FILTERS 2/FACE195129 010ZINGER OR TOFFLITE 18 PROPS159199 FOR FASTER SERVICE FIiWE YOI59 ORDER IN 2213399250 ANSTERCARD AND VISA ACCEPTED BEND ALL ORDERS MW IIWUIRES TO BROOILYN BE V4ODAEL lBETNTRSE 13057 DRPAESEAENfl NAECI R0 ESRDDICLVN NV 1 13 ALl PRICES SiJBECT TO OWIDE OFFER BOOD 30Th OF PUB IERITH 1S0ESS CIMNY SiPPLIES ARE ESNAIISTED FREE 101 SPECIALSLIST WITH ORDERS OR SEND BABE ORDERING IWIATIOR SWEY NO COD ALL PRICES INCLUDE 55 CASH DISCOLBIT NIH PET ORBER $15 ONSOiT CASD USERS PLEASE ADD 57 TO TOTAL INCLUDE CASD0 ESFIRSTIOR DATE INTER EME 0 & SIMWTUBE SHIPPINO & *W4G.INO 1500 3000 ADD 430 OVER 3000 ADD 97 MI 15 1030 & 25 LBS ' OWRSIZE BOX ADD $400 WiT OF CONT 115 ADD 155 OF TOTAL FOR SHIPPINO ALL 4IES P057 BE IN US CINCY SALES ARE FINAL ALLOW TIiE FOR PERSONAL CIECKS TO CLEAR NY RESIDENTS RUST ADO APPLICABLE SALES TAX SEND SASE FOR ALL INQUIRES SPECIFY SIZE COLOR MW TYPE IAPERE REQUIRED small Section glass cloth nose area Level tape seams modeling clay coat surfaces PVA Mix 30 grams Hysol resin hardener apply gel coat surfaces except face plate perimeter cured insert re inforcing bars Coatthe five separation bolts silicone grease thread male mold backing plate holes until theyre flush Mix approximately 600 grams Hysol resin hardener pour female mold Agitate mold release air bubbles Position male mold backing plate over wing access plug gently press place Some resin should ooze out through reinforcing screw holes between two mold-halves Cover seam between mold-halves masking tape contain resin Press appropriate reinforcing screws place set aside cure cured remove masking tape break out balsa wing access plug sur rounding duct tape Apply gentle pressure via separation bolts until mold-halves come apart Remove duct tape female mold Clean out clay residue PVA male mold-half Fill small voids Hysol resin sand 600 sandpaper polish Fuselage shelL Wax mold surfaces two times polish Coat mold surfaces PVA get coating may help force-dry PVA hair dryer working small areas until covered theres doubt completeness PVA coverage apply second coat Dont take chances seizing mold Position appropriately cut Kevlar carbon veil paper pieces layer female mold saturate mixture Shell EPON 815 resin DTA hardener mixed ratio 100 parts resin 11 parts hardener Use 30 grams per fuselage half Tack reinforcing glass cloth nose piece place male mold-half join male female mold Place sufficient C-clamps around mold apply pressure Stop clamping firm resistance feW Excess clamping pressure will destroy molds will result thinner shell Clean off much resin molds possible Use facial tissues clean excess resin out wing access hole After letting molds sit room temperature two hours bake oven 175-2000F two hours Remove oven separate mold-halves still warm Its much easier take shell out mold warm Mold maintenance Inspect molds after run correct problems before next use Always wax before run make sure molds have complete PVA coating Clean molds five runs detergent water Sources 2024 aluminum mold plates local metal supply company Flat-head machine bolts -in steel wire hardware store Hysol resin hardenec TMR MatIs 9016 Rosehill Rd Lenexa KS 66215 Tel 913 888-2606 Mold release wax PVA local fiberglass fabricating company Kevlar Style 350 United Plastics Products PO Box 15766 Orlando FL 32858 TeL 305 295-7911 Carbon veil 50 gm/mt2 Union Carbide Corp 270 Park Ave NY NY 10017 Tel Sales 312 454-2000 Shell EPON 815 resin DTA hardener Miller-Stephenson Danbury CT Tel 203 743-4447 CL Aerobatics/Paul Con fin ued page 68 hand rather glued airplane Further become structural members much stop stress cracking wing-fuselage joint Typically glued place either epoxy white glue Large ones can hollowed out Doug continues havent already tried may want test micro balloons something other epoxy example make up paste Titebond microballoons cut Titebond water make paste experience has produced aston ishingly hard fillet Some have added small amounts soft balsa dust micro balloons/Titebond good results have better luck mix Ambroid microballoons thin mix Ijust add dope clear colored fillets made manner should find no problem dope lifting dope sticks well dope Regarding Epoxolite Doug states may worthwhile mention Epoxolite can used least two different ways 1 outside fuselage wing joint 2 inside fuselage wing joint strength strength inside softer MARKV HAND DRILL/WINDER 5 $2800 Plus Freight * HEAVY DIE-CAST NYLON CASE * METAL GEARS * ADJUSTABLE GEAR TOLERANCE * BALL THRUST-BEARING ON SPINDLE ****************** ********* * *AIAMnITrM * **vvtIEJuI *-vr Phi * Dealers Invited * * xliv year iiarranty* * *CORD * * WetorOry * * Stick Abrasines *A Keen Machine' gives exceptional *sanding control excellent finish * *89~ Basic xci 1 flat Wnd 1 * rits *1 O8~ Builder Special mcI 2 flat 1 halt- * und isand 5 eaih S grits *1 29~ Delor inilods 3flat 2half * round niands Ibuffsixdsand *tO Cxx 6 grits * *Additional Wands Abras*esaxaable * poor Ixcal hobby shop *ADD IS ELMORE toe No i2t4 288 5789* * an 266 xite Tenas 75t49 * 148 Model Aviation HOT STUFFM VIDEO-TIPS FREE FOR UP TO 60 DAYS ONE HOUR VHS CASSETTE CLUB MEETINGS HOBBY SHOPS DISTRIBUTORS sORGANIZATIONS $3000 refundable deposit requIred order Send name address phone checkto Satellite City PO Box 836 Simi CA 93062