AEROBATICS Wynn Paul AS YOU read may getting ready start next year s beauty bomb case may Although known prolific builder nevertheless Id like list some ideas methods tricks have used building resulted reasonably good productmy own 16-pointer 77 Nats er 12-pointersame plane 78 Nats ugh er 13-pointer same plane again 79 Nats Like said Im known prolific builder planes hold up Since lot people use foam wings hope everybody knows use bottom parts foam cutout aug brace joining two wing halves use pieces masking tape about two feet long three top three bottom hold halves together epoxy glue setting up laying fiber glass cloth around seam use masking tape either side cloth contain epoxy keep spreading too far Usually substitute 6-32 8-32 bolt pivot bellcrank also put 1/16-in plywood plate top bottom wing bolt comes through surface will never pulled out soldering brass tubing control horns bushings use piece tubing about six inches long can easily line up square joint cooling cut off proper length use Vaseline lubricant controls before buttoning up because Bob Gieseke said thats what uses making wing tips use heavy wood outboard dont hollow out except tip-weight box Ijust dont see reason go trouble hollow out tip just add weight back tip weight final-shaping tips run piece onein masking tape around wing tip/wing joint prevent accidental gouging sand paper block Several Pampawagons built way final finish flaps being installed theory lot easier work plane flaps last minute Id install flaps best could cover up flap horn goes flap sometimes worked Out some times trouble lining up flaps some sanding finish etc may want try once However think next plane will go back installing flaps before wing fuselage Its good idea make leadout loops soon tips wing Loop solder give pull test solder believe soldering leadouts done before wing plane minimize chance discovering faulty leadout after plane finished Before put wing fuselage make small marks about 24 center line trailing edge marking pen equidistant points exact center wing takes account unequal panel lengths Use marks later gluing fuselage wing measure nose plane marks also rear fuselage assumes fuselage straight start make fuselage use method advocated Ed Southwick Skylark article assemble engine bearers two bulk heads plywood doublers unit first think its easier get square mounting surface engine way After bulkheads bearers together run square metal ruler across engine mounting surface see both bearers squared up Some builders use filler block between engine bearers start off very square surface engine After gluing engine bearers filler block has squared Continued page 112 36 Model Aviation business end Paul Walkers Sea Hawk Kent WA Muffler Bob Hunt Ed Robbert Lexington KY original foam wing stunter Its OS Max 4OFSR has altered port timing Martine muffler Fuel feed fromAnother KentuckianRandy Hancockfrom Midway displays original Eds own-design pressure fuel tankplane features foam wing ST 46 Martine muffler Sig paint ATTENTION ERS Epoxy Glass Cowl NOSEN HOSTETLER PICA BALSA USA PLATF- CONCEPT FLEET SID MORGAN- RCM T CRAFT BYRON/SHEBER PITFS FOLKER D7 BOEING P-26&F4-B4 -GEE BEE MODY KRAFT SUPER FLY A&A SCALE AND OTHERS Send S ASE Complete List T&D FIBERGLASS SPECIALTIES 30925 Block Garden City MI 48135 Phi 313 421 6358 Tee Dee 049s run same recommend start off stock engine fly plane few times become familiar flying characteristics engines used Spullet set up left-hand crankshaft test flights Cox 4-4 left-hand prop prop used Cox ready-to-fly WW biplanes Later single-blade props tried hand-carved wood prop single blade 49 dia x 45 pitch used set record Jim Wade excellent articleEagle I published May 1976 issue Model Aviation article has plans constructing single-blade prop used set Senior Speed record 10827 mph also has some very helpful hints Tee Dee 049 set up addition Wades article would highly recommend get touch Gene Hempel P&G Metal Shop price chromed crankshaft definitely worth effort See address end article record-setting flight Spullet using venturi hole of150 dia following fuel mix 65% nitromethane 10% castor oil 8% synthetic oil Paraplex 17% propylene oxide stock 1702 Cox glow head head gasket also used shaved head will add some power always reliable suggest staying standard heads until getting consistent flights Sources various parts dealer may have stock speed pan Cox Hobbies 1505 E Warner Ave Santa Ana CA 92702 speed shell fiberglass John Newton 2154 Los Padres Rowland Heights CA 91745 Hardware packet Spullet Kirn-Kraft PO Box 785 Anaheim CA 92805 Chromed shaft fitted crankcase P&G Metal Shop 301 N Yale Dr Garland TX 75042 Reworked Tee Dee 049 engines 2-line bellcrank lines etc Kustom Kraftsmanship PO Box 2699 Laguna Hills CA 92653 CL Aerobatics/Paul Continued page 36 add bulkheads plywood doublers method will ensure engine mounting surface flat will put stress bearer causing annoying cracks later after 18-point finish has dried Also using method will enable get good tank fit having grapple fuselage sides Before gluing plywood doublers pencil several lines running lengthwise both sides doubler help line up fuselage sides wing later gluing fuselage onto wing found much better make cutouts wing bottom side fuselage Its just easier lay fuselage down over wing try block up fuselage bottom first put fuselage wing have top block tack-glued onto fuselage fuselage unbowed prevents big gaps later try put blocks back top bottom fuselage comes hollowing blocks can give no star tricksmy last plane has about five places went through block wing tip Ive tried electric light flashlights pins fluorescent lights detectors stetho scopes etc still go through wood guess best advice go slowly carefully Im certain everyone knows trick taping piece sandpaper onto top fuselage running canopy over trim final shape before insetting wood works Also someone told long time ago might have Jim Silhavy Bob Lampione ghosts world Precision Aerobatics past after completing plane make good pinhole very rear canopywhich will allow canopy alr breathe wont get condensa tion its hot outside have done planes time works think its good idea lay coat epoxy fiberglass cloth engine bearers down around under engine compartment help eliminate fuel soaking help keep front end together higli-zippity- zip engines have now building cowlings try construct side cowling close enough engine helps keep fuel tubing filter moving possibly coming loose flight Actually side cowling just touches fuel filter very difficult fuel line slide off spray bar just safety measure can built some designs cowlings latest airplane has full plywood ring nose cowling slips behind ring first time Ive used full plywood ring like lot betterits nice looking will probably keep front end held together cowling fits information stunt PAMPA write Wynn Paul 1640 Maywick Dr Lexington KY 40504 CL Carrier/Perry Continued page 37 what limited beginning engine consistently outperforms other mass-produced engines custom-made plain-bearing conversions well engine Supertigre ST 35 RC engine currently produced flat-top piston Perry-ported design time baffled piston version also avail able flat-top Combat type Profile Carrier engines readily avail able hobby shops discount houses Combat fliers have few box used engines kits suitable Profile Carrier Almost 35-class profile model under 44-in span qualifies some better others 10-point scale bonus makes replica model desirable GS Products Bearcat Corsair Skyraider very good models have out production some time hear turning up hobby shop occasionally 112 Model Aviation WANTED Display Purposes Flying Lady U Restaurant needs purchase well detailed Precision Scale model Ford 5-AT Tn- motor 6 7 wingspan required Send details & photos Irv Perch % Hill Country Inc PO Box 999 Morgan Hill CA 95037 Phone 408 779-4136
Edition: Model Aviation - 1980/10
Page Numbers: 36, 112
AEROBATICS Wynn Paul AS YOU read may getting ready start next year s beauty bomb case may Although known prolific builder nevertheless Id like list some ideas methods tricks have used building resulted reasonably good productmy own 16-pointer 77 Nats er 12-pointersame plane 78 Nats ugh er 13-pointer same plane again 79 Nats Like said Im known prolific builder planes hold up Since lot people use foam wings hope everybody knows use bottom parts foam cutout aug brace joining two wing halves use pieces masking tape about two feet long three top three bottom hold halves together epoxy glue setting up laying fiber glass cloth around seam use masking tape either side cloth contain epoxy keep spreading too far Usually substitute 6-32 8-32 bolt pivot bellcrank also put 1/16-in plywood plate top bottom wing bolt comes through surface will never pulled out soldering brass tubing control horns bushings use piece tubing about six inches long can easily line up square joint cooling cut off proper length use Vaseline lubricant controls before buttoning up because Bob Gieseke said thats what uses making wing tips use heavy wood outboard dont hollow out except tip-weight box Ijust dont see reason go trouble hollow out tip just add weight back tip weight final-shaping tips run piece onein masking tape around wing tip/wing joint prevent accidental gouging sand paper block Several Pampawagons built way final finish flaps being installed theory lot easier work plane flaps last minute Id install flaps best could cover up flap horn goes flap sometimes worked Out some times trouble lining up flaps some sanding finish etc may want try once However think next plane will go back installing flaps before wing fuselage Its good idea make leadout loops soon tips wing Loop solder give pull test solder believe soldering leadouts done before wing plane minimize chance discovering faulty leadout after plane finished Before put wing fuselage make small marks about 24 center line trailing edge marking pen equidistant points exact center wing takes account unequal panel lengths Use marks later gluing fuselage wing measure nose plane marks also rear fuselage assumes fuselage straight start make fuselage use method advocated Ed Southwick Skylark article assemble engine bearers two bulk heads plywood doublers unit first think its easier get square mounting surface engine way After bulkheads bearers together run square metal ruler across engine mounting surface see both bearers squared up Some builders use filler block between engine bearers start off very square surface engine After gluing engine bearers filler block has squared Continued page 112 36 Model Aviation business end Paul Walkers Sea Hawk Kent WA Muffler Bob Hunt Ed Robbert Lexington KY original foam wing stunter Its OS Max 4OFSR has altered port timing Martine muffler Fuel feed fromAnother KentuckianRandy Hancockfrom Midway displays original Eds own-design pressure fuel tankplane features foam wing ST 46 Martine muffler Sig paint ATTENTION ERS Epoxy Glass Cowl NOSEN HOSTETLER PICA BALSA USA PLATF- CONCEPT FLEET SID MORGAN- RCM T CRAFT BYRON/SHEBER PITFS FOLKER D7 BOEING P-26&F4-B4 -GEE BEE MODY KRAFT SUPER FLY A&A SCALE AND OTHERS Send S ASE Complete List T&D FIBERGLASS SPECIALTIES 30925 Block Garden City MI 48135 Phi 313 421 6358 Tee Dee 049s run same recommend start off stock engine fly plane few times become familiar flying characteristics engines used Spullet set up left-hand crankshaft test flights Cox 4-4 left-hand prop prop used Cox ready-to-fly WW biplanes Later single-blade props tried hand-carved wood prop single blade 49 dia x 45 pitch used set record Jim Wade excellent articleEagle I published May 1976 issue Model Aviation article has plans constructing single-blade prop used set Senior Speed record 10827 mph also has some very helpful hints Tee Dee 049 set up addition Wades article would highly recommend get touch Gene Hempel P&G Metal Shop price chromed crankshaft definitely worth effort See address end article record-setting flight Spullet using venturi hole of150 dia following fuel mix 65% nitromethane 10% castor oil 8% synthetic oil Paraplex 17% propylene oxide stock 1702 Cox glow head head gasket also used shaved head will add some power always reliable suggest staying standard heads until getting consistent flights Sources various parts dealer may have stock speed pan Cox Hobbies 1505 E Warner Ave Santa Ana CA 92702 speed shell fiberglass John Newton 2154 Los Padres Rowland Heights CA 91745 Hardware packet Spullet Kirn-Kraft PO Box 785 Anaheim CA 92805 Chromed shaft fitted crankcase P&G Metal Shop 301 N Yale Dr Garland TX 75042 Reworked Tee Dee 049 engines 2-line bellcrank lines etc Kustom Kraftsmanship PO Box 2699 Laguna Hills CA 92653 CL Aerobatics/Paul Continued page 36 add bulkheads plywood doublers method will ensure engine mounting surface flat will put stress bearer causing annoying cracks later after 18-point finish has dried Also using method will enable get good tank fit having grapple fuselage sides Before gluing plywood doublers pencil several lines running lengthwise both sides doubler help line up fuselage sides wing later gluing fuselage onto wing found much better make cutouts wing bottom side fuselage Its just easier lay fuselage down over wing try block up fuselage bottom first put fuselage wing have top block tack-glued onto fuselage fuselage unbowed prevents big gaps later try put blocks back top bottom fuselage comes hollowing blocks can give no star tricksmy last plane has about five places went through block wing tip Ive tried electric light flashlights pins fluorescent lights detectors stetho scopes etc still go through wood guess best advice go slowly carefully Im certain everyone knows trick taping piece sandpaper onto top fuselage running canopy over trim final shape before insetting wood works Also someone told long time ago might have Jim Silhavy Bob Lampione ghosts world Precision Aerobatics past after completing plane make good pinhole very rear canopywhich will allow canopy alr breathe wont get condensa tion its hot outside have done planes time works think its good idea lay coat epoxy fiberglass cloth engine bearers down around under engine compartment help eliminate fuel soaking help keep front end together higli-zippity- zip engines have now building cowlings try construct side cowling close enough engine helps keep fuel tubing filter moving possibly coming loose flight Actually side cowling just touches fuel filter very difficult fuel line slide off spray bar just safety measure can built some designs cowlings latest airplane has full plywood ring nose cowling slips behind ring first time Ive used full plywood ring like lot betterits nice looking will probably keep front end held together cowling fits information stunt PAMPA write Wynn Paul 1640 Maywick Dr Lexington KY 40504 CL Carrier/Perry Continued page 37 what limited beginning engine consistently outperforms other mass-produced engines custom-made plain-bearing conversions well engine Supertigre ST 35 RC engine currently produced flat-top piston Perry-ported design time baffled piston version also avail able flat-top Combat type Profile Carrier engines readily avail able hobby shops discount houses Combat fliers have few box used engines kits suitable Profile Carrier Almost 35-class profile model under 44-in span qualifies some better others 10-point scale bonus makes replica model desirable GS Products Bearcat Corsair Skyraider very good models have out production some time hear turning up hobby shop occasionally 112 Model Aviation WANTED Display Purposes Flying Lady U Restaurant needs purchase well detailed Precision Scale model Ford 5-AT Tn- motor 6 7 wingspan required Send details & photos Irv Perch % Hill Country Inc PO Box 999 Morgan Hill CA 95037 Phone 408 779-4136