I Helicopters El Walt Schoonard YOUMANS HEAD MODS Due fact Im thinking too things time made mistake mix measurements Youmans Head Mods article should follows center pivot center inner ball 5/16 center first ball center outer ball 5/8 Bill has just now changed 1/2-in between inner outer ball centers gives greater amount collective quicker cyclic response flying skill too great yet would go first measure ments skill improves can change latter hope goof did confuse too much Sorry Best Helicopter Finish Now winter will have plenty time build new helicopters next summer following finish proced ure will make much easier put super finish new bird finish developed fiberglass epoxy wood structures also developed easy foolproof can repaired spotted should unfortunate have crash fuelproof mar proof idiot proof fuselages kits either fiberglass epoxy-glass layed up female mold using some type mold release residue release must removed fuselage before work can started finish use either acetone lacquer thinner Scotch-Brite pad scrub release agent off should done open area plenty ventilation Vigorous scrub bing will ensure greater adhesion later Now sand fuselage #220 grit wet dry sandpaper blow clean spect carefully mold defects pin holes can filled autobody plastic better known bondo brands market will just fine material heavy use sparingly bondo cured can scraped singleedged razor sanded #220 sandpaper exposed wood surfaces should coated finish resin scraped single-edged razor blade sanded #220 paper Blow clean air pressure good idea make some sort jig hold fuselage can get surfaces easily Now using low-grade thinner such DuPont #3608 apply couple coats primer DuPont 80S Oxide should thinned least two parts thinner part primer Allow 20 30 minutes dry dry sand #220 paper sanding should remove primer leaving low areas same exposed wood parts Blow clean apply two coats primer can sanded #320 #400 grit paper Make sure grain covered wood parts some grain still shows apply primer sand lightly still have few small imperfec tions can filled red oxideglazing putty Use small amounts needed Allow dry sand smooth putty remain should small imperfections Now homogeneous coat primer thinned three parts should lightly sprayed over surfaces Next find Ditzler body supply store look through auto-paint chips select colors Purchase pint color usedin acrylic lacquer Also buy what masking tape may need such 3/4-in 1/2-in 1/4-in 1/8-in masking tape recommend Garbo rundum #98 tape very thin has very sharp edge store doesnt have brand look qualities other brand tapes Purchase quart Ditzler Acrylic Clear quart Ditzler Delthane Clear Continued page 90 28 Model Aviation Authors Jet Ranger finish described text Easy ana roolproo finish developed tor fiberglass epoxy wood structures Too bad cant show pic four colors As line-up five Lama SA-31 5s suggest aircraft well represented 77 German meet 15-lb Swiss-built Lama SA-315 Shown two figures cockpit copter very good rugged performer frame holding 3 X 3 sheet plastic over heating element mount form single-stroke vacuum pump mounted box support buying used check oper ation element pump pump pulls heated plastic over form instantly produce part form must have slightly tapered sides known draft angle order extract molded part first uses made tool production two dozen sheets corrugated shape ailerons Waco Cabin YKS-6 3 length lim itation meant three pieces re quired surface joints invisible made along corrugation material used form 1/4 Plexiglas acrylic sheet chosen because gives very sharp corners impression produces its smoothness leaves no blemishes finished part dense hardwood such birch would likely have done well Grooves exact depth spacing machined Plexiglas hollowground blade circular table saw set 45 degrees just barely extending above saw table edge Plexiglas cut away saw connect corrugation grooves air flow single hole drilled area evacuate air pump dur ing forming process Plexiglas form set support provided Vac-U-Form held place two layers masking tape tape serves vacuum seal After sytrene part formed cut shape scissors fastened hollow balsa ailerons epoxy cement Dummy pilots can esisily molded cluding clothing shoes using parts dolls molds complete pilot made manner will weigh less ounce mold pilots cap can carved sanded balsa since absolutely smooth cap really desir able Wood grain balsa other softwood will offset styrene visible seams cap can repro duced cementing pieces fish line across top wood mold cap completed addition con struction paper visor held place contact cement Ordinary model cement dope will dissolve styrene can sprayed light dry coats dope out damage wet coat will cause warping change shape Enamel epoxy other paints harm less styrene Navigation lights best molded clear butyrate sheet red green color can applied inside give appearance transparent lenses Some strobe lights have shape will permit molding have ring lens will lock mold lens cannot extracted respect vacuum molding same other type parts cannot re moved back draft con dition exists whenever part smaller base top draft angle taper must used sides mold easy extraction part Small fairings strut cuffs louvers spection covers air scoops hinges doors can duplicated quantity minimum weight penalty rud der cable lead-out fairing fastened place screws can have screw heads reproduced part fairing adding pin heads mold part requires trimming painting fore cementing place New Competition Class stimulating suggestion new competition class semi-scale models offered Bob Lopshire Innovators Class plane need modeled after specific prototype may combination several planes different manu facturers purpose create new plane scale-like appearance may closely resemble particular air craft may bear similarity main idea bring back true fun RC class features Bob advocates combining two people team designer-builder other pilot Builder pilot would need team least two years lose standing class builder pilot could same person divi sion homebuilders either division plane would judged scalelike flight ingenuity realistic appearance would interesting see what scale modelers could produce giv en free reign designing planes own ideas hindrance having faithfully copy existing design Bob Wischer Ri 5-221 Lapham Peak Rd Delafield WI 53018 RC Pylon/Lane continued page 27 very difficult keep up airplane speed wonder will end firmly believe majority Formula pilots capable handling Formula ship speeds guys will think about times have seen guy very fast plane get trouble because could stay ahead Maybe should consider milder fuel stock props method keeping speed down allow little mar gin safety dont lose event expect will get blast few diehards believe all-out speed can appreciate feelings am looking preservation event people will participate Think about let know what ideas issue slowing down Formula keeping QM stated 1976-1977 AMA Rule Book Dave Lane 4477 W 136th St Haw thorne CA 90250 RC Helicopters/Schoonard continued page 28 Hardener Also couple sheets #600 grit wet-or-dry sandpaper Using color selected base color spray entire helicopter until coy90 Model Aviation Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground GREATEST B/C zBASIC TBAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-BAY dealers sold themSHALL WE SAY MORE Andresvs Airoraft Model Co Inc US Ete 1& Noeth St Topsfield Mass 01983 881-8541 Price $3995 kit per dollar bar em ered evenly dry about 30 minutes spray couple wet coats clear acrylic Reduce acrylic mater ials will spray no orange peel Allow dry overnight tape up multi-color schemes rea son clear after base color prevent kinds finger marks getting porous paint masking multi-colors make sure have no spot can leak overspray onto base color t coats multi-colors should sprayed rather dry seal tape edges Allow multi-ctMors dry several hours before removing tape pulling back over itself Any feather edges paint left standing can removed scraping light ly single-edged razor blade should done carefully Now make sure edges sharp no overspray present overspray detected sand #600 grit wet wipe dry Now wipe entire helicopter Preps-Sol DuPont grease wax re mover remove finger marks Using tac rag remove lint dust Spray couple wet coats acrylic clear over painted surfaces Allow dry overnight Now sand paint edges smooth #600 grit wet wipe clean tac lint free Now comes hard partbut part will make helicopter beautiful durable Because Delthane difficult spray should practice some ob ject such old gallon paint can Mix up small quantity per instructions container practice spraying until get knack sprays like enamel flows after surface will run spray too wet will flow spray too dry sure wear pro tective mask Let tell againwear protective mask Delthane will cure overnight can safely handled 24 hours have used type finish years have won single best finish con test have ever entered except beaten plane painted another person beat own handiwork Oh well its fickle worldso what may want practice whole procedure old box board sheet metal until get hang great part Ditzler Acrylic Lacquer very forgiving mistakes dirt runs bugs can sanded out done over within minutes times gave full curing times need adhered repairs can done soon can touch paint usually just minutes Bill materials 1 gallon DuPont #3608 Thinner $350 1 pint DuPont Preps-Sol Cleaner $180 1 quart DuPont #808 oxide primer $450 1 roll 3/4-inch tape $200 1 roll 1/4-inch tape 85 1 roll 1/8-inch tape 85 1 Tac-Rag 60 1 pint color $350 ea 1 quart Ditzler Acrylic Clear $450 1 quart Ditzler Delthane & Hardener $750 minimals will enough several helicopters sure mix amount Delthane going use will cure up un usable Clean out spray gun after use lacquer thinner Cost-wise am sure will find economical other process will like results World-Wide RC Helicopter Symposium Because great manufac turers cannot come time planned symposium new date will have selected column will keep informed progress made flying trying hard enough Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 RC Soaring/Pruss continued page 29 name Aquila 1000 So could use existing fuselage Paul maintained original root rib dimensions transitioned en larged section root next rib shown photos proFebruary 1978 91 Peflormance Flying . K & B 35cc 21 R/C ENGINE flying WORK HORSE its site no rugged werful dependable engine mpetitors its class size will know theyre up against winner Easy start Requires no break-in period Features incIude Efficient Muffler r 90 decibels Cylinder Piston Bearings nced By-Pass Port ing y Carburetor Density Aluminum Die Casting
Edition: Model Aviation - 1978/02
Page Numbers: 28, 90, 91
I Helicopters El Walt Schoonard YOUMANS HEAD MODS Due fact Im thinking too things time made mistake mix measurements Youmans Head Mods article should follows center pivot center inner ball 5/16 center first ball center outer ball 5/8 Bill has just now changed 1/2-in between inner outer ball centers gives greater amount collective quicker cyclic response flying skill too great yet would go first measure ments skill improves can change latter hope goof did confuse too much Sorry Best Helicopter Finish Now winter will have plenty time build new helicopters next summer following finish proced ure will make much easier put super finish new bird finish developed fiberglass epoxy wood structures also developed easy foolproof can repaired spotted should unfortunate have crash fuelproof mar proof idiot proof fuselages kits either fiberglass epoxy-glass layed up female mold using some type mold release residue release must removed fuselage before work can started finish use either acetone lacquer thinner Scotch-Brite pad scrub release agent off should done open area plenty ventilation Vigorous scrub bing will ensure greater adhesion later Now sand fuselage #220 grit wet dry sandpaper blow clean spect carefully mold defects pin holes can filled autobody plastic better known bondo brands market will just fine material heavy use sparingly bondo cured can scraped singleedged razor sanded #220 sandpaper exposed wood surfaces should coated finish resin scraped single-edged razor blade sanded #220 paper Blow clean air pressure good idea make some sort jig hold fuselage can get surfaces easily Now using low-grade thinner such DuPont #3608 apply couple coats primer DuPont 80S Oxide should thinned least two parts thinner part primer Allow 20 30 minutes dry dry sand #220 paper sanding should remove primer leaving low areas same exposed wood parts Blow clean apply two coats primer can sanded #320 #400 grit paper Make sure grain covered wood parts some grain still shows apply primer sand lightly still have few small imperfec tions can filled red oxideglazing putty Use small amounts needed Allow dry sand smooth putty remain should small imperfections Now homogeneous coat primer thinned three parts should lightly sprayed over surfaces Next find Ditzler body supply store look through auto-paint chips select colors Purchase pint color usedin acrylic lacquer Also buy what masking tape may need such 3/4-in 1/2-in 1/4-in 1/8-in masking tape recommend Garbo rundum #98 tape very thin has very sharp edge store doesnt have brand look qualities other brand tapes Purchase quart Ditzler Acrylic Clear quart Ditzler Delthane Clear Continued page 90 28 Model Aviation Authors Jet Ranger finish described text Easy ana roolproo finish developed tor fiberglass epoxy wood structures Too bad cant show pic four colors As line-up five Lama SA-31 5s suggest aircraft well represented 77 German meet 15-lb Swiss-built Lama SA-315 Shown two figures cockpit copter very good rugged performer frame holding 3 X 3 sheet plastic over heating element mount form single-stroke vacuum pump mounted box support buying used check oper ation element pump pump pulls heated plastic over form instantly produce part form must have slightly tapered sides known draft angle order extract molded part first uses made tool production two dozen sheets corrugated shape ailerons Waco Cabin YKS-6 3 length lim itation meant three pieces re quired surface joints invisible made along corrugation material used form 1/4 Plexiglas acrylic sheet chosen because gives very sharp corners impression produces its smoothness leaves no blemishes finished part dense hardwood such birch would likely have done well Grooves exact depth spacing machined Plexiglas hollowground blade circular table saw set 45 degrees just barely extending above saw table edge Plexiglas cut away saw connect corrugation grooves air flow single hole drilled area evacuate air pump dur ing forming process Plexiglas form set support provided Vac-U-Form held place two layers masking tape tape serves vacuum seal After sytrene part formed cut shape scissors fastened hollow balsa ailerons epoxy cement Dummy pilots can esisily molded cluding clothing shoes using parts dolls molds complete pilot made manner will weigh less ounce mold pilots cap can carved sanded balsa since absolutely smooth cap really desir able Wood grain balsa other softwood will offset styrene visible seams cap can repro duced cementing pieces fish line across top wood mold cap completed addition con struction paper visor held place contact cement Ordinary model cement dope will dissolve styrene can sprayed light dry coats dope out damage wet coat will cause warping change shape Enamel epoxy other paints harm less styrene Navigation lights best molded clear butyrate sheet red green color can applied inside give appearance transparent lenses Some strobe lights have shape will permit molding have ring lens will lock mold lens cannot extracted respect vacuum molding same other type parts cannot re moved back draft con dition exists whenever part smaller base top draft angle taper must used sides mold easy extraction part Small fairings strut cuffs louvers spection covers air scoops hinges doors can duplicated quantity minimum weight penalty rud der cable lead-out fairing fastened place screws can have screw heads reproduced part fairing adding pin heads mold part requires trimming painting fore cementing place New Competition Class stimulating suggestion new competition class semi-scale models offered Bob Lopshire Innovators Class plane need modeled after specific prototype may combination several planes different manu facturers purpose create new plane scale-like appearance may closely resemble particular air craft may bear similarity main idea bring back true fun RC class features Bob advocates combining two people team designer-builder other pilot Builder pilot would need team least two years lose standing class builder pilot could same person divi sion homebuilders either division plane would judged scalelike flight ingenuity realistic appearance would interesting see what scale modelers could produce giv en free reign designing planes own ideas hindrance having faithfully copy existing design Bob Wischer Ri 5-221 Lapham Peak Rd Delafield WI 53018 RC Pylon/Lane continued page 27 very difficult keep up airplane speed wonder will end firmly believe majority Formula pilots capable handling Formula ship speeds guys will think about times have seen guy very fast plane get trouble because could stay ahead Maybe should consider milder fuel stock props method keeping speed down allow little mar gin safety dont lose event expect will get blast few diehards believe all-out speed can appreciate feelings am looking preservation event people will participate Think about let know what ideas issue slowing down Formula keeping QM stated 1976-1977 AMA Rule Book Dave Lane 4477 W 136th St Haw thorne CA 90250 RC Helicopters/Schoonard continued page 28 Hardener Also couple sheets #600 grit wet-or-dry sandpaper Using color selected base color spray entire helicopter until coy90 Model Aviation Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground GREATEST B/C zBASIC TBAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-BAY dealers sold themSHALL WE SAY MORE Andresvs Airoraft Model Co Inc US Ete 1& Noeth St Topsfield Mass 01983 881-8541 Price $3995 kit per dollar bar em ered evenly dry about 30 minutes spray couple wet coats clear acrylic Reduce acrylic mater ials will spray no orange peel Allow dry overnight tape up multi-color schemes rea son clear after base color prevent kinds finger marks getting porous paint masking multi-colors make sure have no spot can leak overspray onto base color t coats multi-colors should sprayed rather dry seal tape edges Allow multi-ctMors dry several hours before removing tape pulling back over itself Any feather edges paint left standing can removed scraping light ly single-edged razor blade should done carefully Now make sure edges sharp no overspray present overspray detected sand #600 grit wet wipe dry Now wipe entire helicopter Preps-Sol DuPont grease wax re mover remove finger marks Using tac rag remove lint dust Spray couple wet coats acrylic clear over painted surfaces Allow dry overnight Now sand paint edges smooth #600 grit wet wipe clean tac lint free Now comes hard partbut part will make helicopter beautiful durable Because Delthane difficult spray should practice some ob ject such old gallon paint can Mix up small quantity per instructions container practice spraying until get knack sprays like enamel flows after surface will run spray too wet will flow spray too dry sure wear pro tective mask Let tell againwear protective mask Delthane will cure overnight can safely handled 24 hours have used type finish years have won single best finish con test have ever entered except beaten plane painted another person beat own handiwork Oh well its fickle worldso what may want practice whole procedure old box board sheet metal until get hang great part Ditzler Acrylic Lacquer very forgiving mistakes dirt runs bugs can sanded out done over within minutes times gave full curing times need adhered repairs can done soon can touch paint usually just minutes Bill materials 1 gallon DuPont #3608 Thinner $350 1 pint DuPont Preps-Sol Cleaner $180 1 quart DuPont #808 oxide primer $450 1 roll 3/4-inch tape $200 1 roll 1/4-inch tape 85 1 roll 1/8-inch tape 85 1 Tac-Rag 60 1 pint color $350 ea 1 quart Ditzler Acrylic Clear $450 1 quart Ditzler Delthane & Hardener $750 minimals will enough several helicopters sure mix amount Delthane going use will cure up un usable Clean out spray gun after use lacquer thinner Cost-wise am sure will find economical other process will like results World-Wide RC Helicopter Symposium Because great manufac turers cannot come time planned symposium new date will have selected column will keep informed progress made flying trying hard enough Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 RC Soaring/Pruss continued page 29 name Aquila 1000 So could use existing fuselage Paul maintained original root rib dimensions transitioned en larged section root next rib shown photos proFebruary 1978 91 Peflormance Flying . K & B 35cc 21 R/C ENGINE flying WORK HORSE its site no rugged werful dependable engine mpetitors its class size will know theyre up against winner Easy start Requires no break-in period Features incIude Efficient Muffler r 90 decibels Cylinder Piston Bearings nced By-Pass Port ing y Carburetor Density Aluminum Die Casting
Edition: Model Aviation - 1978/02
Page Numbers: 28, 90, 91
I Helicopters El Walt Schoonard YOUMANS HEAD MODS Due fact Im thinking too things time made mistake mix measurements Youmans Head Mods article should follows center pivot center inner ball 5/16 center first ball center outer ball 5/8 Bill has just now changed 1/2-in between inner outer ball centers gives greater amount collective quicker cyclic response flying skill too great yet would go first measure ments skill improves can change latter hope goof did confuse too much Sorry Best Helicopter Finish Now winter will have plenty time build new helicopters next summer following finish proced ure will make much easier put super finish new bird finish developed fiberglass epoxy wood structures also developed easy foolproof can repaired spotted should unfortunate have crash fuelproof mar proof idiot proof fuselages kits either fiberglass epoxy-glass layed up female mold using some type mold release residue release must removed fuselage before work can started finish use either acetone lacquer thinner Scotch-Brite pad scrub release agent off should done open area plenty ventilation Vigorous scrub bing will ensure greater adhesion later Now sand fuselage #220 grit wet dry sandpaper blow clean spect carefully mold defects pin holes can filled autobody plastic better known bondo brands market will just fine material heavy use sparingly bondo cured can scraped singleedged razor sanded #220 sandpaper exposed wood surfaces should coated finish resin scraped single-edged razor blade sanded #220 paper Blow clean air pressure good idea make some sort jig hold fuselage can get surfaces easily Now using low-grade thinner such DuPont #3608 apply couple coats primer DuPont 80S Oxide should thinned least two parts thinner part primer Allow 20 30 minutes dry dry sand #220 paper sanding should remove primer leaving low areas same exposed wood parts Blow clean apply two coats primer can sanded #320 #400 grit paper Make sure grain covered wood parts some grain still shows apply primer sand lightly still have few small imperfec tions can filled red oxideglazing putty Use small amounts needed Allow dry sand smooth putty remain should small imperfections Now homogeneous coat primer thinned three parts should lightly sprayed over surfaces Next find Ditzler body supply store look through auto-paint chips select colors Purchase pint color usedin acrylic lacquer Also buy what masking tape may need such 3/4-in 1/2-in 1/4-in 1/8-in masking tape recommend Garbo rundum #98 tape very thin has very sharp edge store doesnt have brand look qualities other brand tapes Purchase quart Ditzler Acrylic Clear quart Ditzler Delthane Clear Continued page 90 28 Model Aviation Authors Jet Ranger finish described text Easy ana roolproo finish developed tor fiberglass epoxy wood structures Too bad cant show pic four colors As line-up five Lama SA-31 5s suggest aircraft well represented 77 German meet 15-lb Swiss-built Lama SA-315 Shown two figures cockpit copter very good rugged performer frame holding 3 X 3 sheet plastic over heating element mount form single-stroke vacuum pump mounted box support buying used check oper ation element pump pump pulls heated plastic over form instantly produce part form must have slightly tapered sides known draft angle order extract molded part first uses made tool production two dozen sheets corrugated shape ailerons Waco Cabin YKS-6 3 length lim itation meant three pieces re quired surface joints invisible made along corrugation material used form 1/4 Plexiglas acrylic sheet chosen because gives very sharp corners impression produces its smoothness leaves no blemishes finished part dense hardwood such birch would likely have done well Grooves exact depth spacing machined Plexiglas hollowground blade circular table saw set 45 degrees just barely extending above saw table edge Plexiglas cut away saw connect corrugation grooves air flow single hole drilled area evacuate air pump dur ing forming process Plexiglas form set support provided Vac-U-Form held place two layers masking tape tape serves vacuum seal After sytrene part formed cut shape scissors fastened hollow balsa ailerons epoxy cement Dummy pilots can esisily molded cluding clothing shoes using parts dolls molds complete pilot made manner will weigh less ounce mold pilots cap can carved sanded balsa since absolutely smooth cap really desir able Wood grain balsa other softwood will offset styrene visible seams cap can repro duced cementing pieces fish line across top wood mold cap completed addition con struction paper visor held place contact cement Ordinary model cement dope will dissolve styrene can sprayed light dry coats dope out damage wet coat will cause warping change shape Enamel epoxy other paints harm less styrene Navigation lights best molded clear butyrate sheet red green color can applied inside give appearance transparent lenses Some strobe lights have shape will permit molding have ring lens will lock mold lens cannot extracted respect vacuum molding same other type parts cannot re moved back draft con dition exists whenever part smaller base top draft angle taper must used sides mold easy extraction part Small fairings strut cuffs louvers spection covers air scoops hinges doors can duplicated quantity minimum weight penalty rud der cable lead-out fairing fastened place screws can have screw heads reproduced part fairing adding pin heads mold part requires trimming painting fore cementing place New Competition Class stimulating suggestion new competition class semi-scale models offered Bob Lopshire Innovators Class plane need modeled after specific prototype may combination several planes different manu facturers purpose create new plane scale-like appearance may closely resemble particular air craft may bear similarity main idea bring back true fun RC class features Bob advocates combining two people team designer-builder other pilot Builder pilot would need team least two years lose standing class builder pilot could same person divi sion homebuilders either division plane would judged scalelike flight ingenuity realistic appearance would interesting see what scale modelers could produce giv en free reign designing planes own ideas hindrance having faithfully copy existing design Bob Wischer Ri 5-221 Lapham Peak Rd Delafield WI 53018 RC Pylon/Lane continued page 27 very difficult keep up airplane speed wonder will end firmly believe majority Formula pilots capable handling Formula ship speeds guys will think about times have seen guy very fast plane get trouble because could stay ahead Maybe should consider milder fuel stock props method keeping speed down allow little mar gin safety dont lose event expect will get blast few diehards believe all-out speed can appreciate feelings am looking preservation event people will participate Think about let know what ideas issue slowing down Formula keeping QM stated 1976-1977 AMA Rule Book Dave Lane 4477 W 136th St Haw thorne CA 90250 RC Helicopters/Schoonard continued page 28 Hardener Also couple sheets #600 grit wet-or-dry sandpaper Using color selected base color spray entire helicopter until coy90 Model Aviation Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground GREATEST B/C zBASIC TBAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-BAY dealers sold themSHALL WE SAY MORE Andresvs Airoraft Model Co Inc US Ete 1& Noeth St Topsfield Mass 01983 881-8541 Price $3995 kit per dollar bar em ered evenly dry about 30 minutes spray couple wet coats clear acrylic Reduce acrylic mater ials will spray no orange peel Allow dry overnight tape up multi-color schemes rea son clear after base color prevent kinds finger marks getting porous paint masking multi-colors make sure have no spot can leak overspray onto base color t coats multi-colors should sprayed rather dry seal tape edges Allow multi-ctMors dry several hours before removing tape pulling back over itself Any feather edges paint left standing can removed scraping light ly single-edged razor blade should done carefully Now make sure edges sharp no overspray present overspray detected sand #600 grit wet wipe dry Now wipe entire helicopter Preps-Sol DuPont grease wax re mover remove finger marks Using tac rag remove lint dust Spray couple wet coats acrylic clear over painted surfaces Allow dry overnight Now sand paint edges smooth #600 grit wet wipe clean tac lint free Now comes hard partbut part will make helicopter beautiful durable Because Delthane difficult spray should practice some ob ject such old gallon paint can Mix up small quantity per instructions container practice spraying until get knack sprays like enamel flows after surface will run spray too wet will flow spray too dry sure wear pro tective mask Let tell againwear protective mask Delthane will cure overnight can safely handled 24 hours have used type finish years have won single best finish con test have ever entered except beaten plane painted another person beat own handiwork Oh well its fickle worldso what may want practice whole procedure old box board sheet metal until get hang great part Ditzler Acrylic Lacquer very forgiving mistakes dirt runs bugs can sanded out done over within minutes times gave full curing times need adhered repairs can done soon can touch paint usually just minutes Bill materials 1 gallon DuPont #3608 Thinner $350 1 pint DuPont Preps-Sol Cleaner $180 1 quart DuPont #808 oxide primer $450 1 roll 3/4-inch tape $200 1 roll 1/4-inch tape 85 1 roll 1/8-inch tape 85 1 Tac-Rag 60 1 pint color $350 ea 1 quart Ditzler Acrylic Clear $450 1 quart Ditzler Delthane & Hardener $750 minimals will enough several helicopters sure mix amount Delthane going use will cure up un usable Clean out spray gun after use lacquer thinner Cost-wise am sure will find economical other process will like results World-Wide RC Helicopter Symposium Because great manufac turers cannot come time planned symposium new date will have selected column will keep informed progress made flying trying hard enough Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 RC Soaring/Pruss continued page 29 name Aquila 1000 So could use existing fuselage Paul maintained original root rib dimensions transitioned en larged section root next rib shown photos proFebruary 1978 91 Peflormance Flying . K & B 35cc 21 R/C ENGINE flying WORK HORSE its site no rugged werful dependable engine mpetitors its class size will know theyre up against winner Easy start Requires no break-in period Features incIude Efficient Muffler r 90 decibels Cylinder Piston Bearings nced By-Pass Port ing y Carburetor Density Aluminum Die Casting