C SCALE Mike Gretz IN case havent heard 1980 CL Scale World Championships have heen cancelled deadline contest organizers set final entry commitment interested coun tries recently passed getting sufficient number signed up CL Scale As mentioned March 80 column five coun tries needed stage World Championships time wrote column Dec 79 four countries firmly committed felt fairly confident nation would sign up time didnt work out way Perhaps intense political situations have developed around world since including talk Olympic boycott may have something reluctance new countries sign up Its hard say second time row WC CL Scale event cancelled due political problems apparent lack interest enough FAI participating countries first time 1978 has wonder now what kind mammoth effort might take some future years get CL Scale back WC schedule Just look uphill battle FF Scale enthusiasts country having trying get event World Champion ship status sincerest hope second cancellation will lead similar struggle CL Scale competitors United States have expressed hope someday participating Scale World Championships Al Arnold modeler New Orleans flies unique style CL Scale model might recall have pictured some models before column photo Als Gotha bomber August 79 ModelAviation Albatros D-IIa shown January 80 issue models reflect strong FF Scale influence both size construction style Most small 28 42 wingspan recently sent photos other interesting CL Scale aircraft way Al president Louisiana Scale Squadron club includes FF CL RC scale modelers lumped group has scale common denominator part Al Arnolds letter cut teeth kid rubber FF scale several years thats built first got CL construction techniques knew keep light simple Now find CL models really beefed up FFjobs glow engine control lines Because light over powered model seems fly better heavy underpowered have shown up contests competitive models other guys cant understand Albatros good example 28 wingspan biplane drag flies well 049 Gotha GIV excellent example philosophy applied large model Im telling because people seem think ukie scale ship has heavy good dont Ive mentioned occasions like build CL Scale models larger 40 70 inch wingspan range Now wouldnt want anyone assume therefore disagree Al Arnolds style building came conclusion youve probably missed main point Als own reasoning fact total agreement what makes CL Scale model fly really well build light overpowered Al keeps wing loading down ultra-light construction whereas prefer larger model Someday Im going build small ultra-light ukie scale like Als give arm rest looks like fun Continued page 109 34 Model Aviation Didnt know WW2 DeHavilland Mosquito bombers needle valves Rolls-Royce engines Bill Boss New Hyde Park NY built Precision Scale model took pictures too Mosquito Britains version all-wood fighter-bomber although markings 654th Bomber Squadron USAAF July 1944 models wingspan 62 weighs just under 14 lbs Power two Webra 40s Check out expert landing gear detailing Model features operating flaps bomb bay doors droppable bombs fuel tanks years Nationals competition should see well other magnificent CL scale models flight line Al Arnold uses small engines models uses light built-up Another Al Arnold rendition Soviet airplane Ko construction keep flyable rendition WW2 rean War Red Chinese Mig 15 locally built experimental ductad Russian Lavochkin LA-S fighter-bomber 33 wingspan model fan propels model craft weighs 1/2 lbs has 28 inwingspan has features theoriginalsplit flapsoperational leading edge powered 15 engine Finished Silkspan dope Landry slats bomb drop Photo Frank Landry pic AT LAST SOME PrimerU ndercoater Nowin Weve taken popular two-part white primer-undercoat formula made gray Just gray enough please have told us want see dents nicks ripples re sanding Now make little visible just efficient ever course its still available white too Wood Plastic Metal Fiberglass Hobbypoxy primer-undercoater covers well cures fills fast shrinking easy sand provides smooth-as-glass surface. great adhesion wood plastic metal fiberglass Whether youre balsa builder molded plastic buff whether brush spray it. can now put little color life Hobbypoxy gray undercoat. good ever lot visible complete information how-to-do-it Hobbypoxy Finishing Guide write today AflflhIflAVUA Division Pettit Paint Co Inc H unniruAt PRODUCTS 32 Pine Street Rockaway NJ 07866 HOBBYPOXY ct group finishing products especially formulated hobbyists including Epoxy Glues Epoxy-enamel Paints Fillers Primer-undercoaters Resins canopy always use extreme care glueing Hot Stuff Before canopy permanently glued position several things completed Make antenna sandwiching small 2-56 screw between two pieces 3/32 plywood leaving slightly ads protruding bottom antenna mount made first cutting hole canopy just large enough nut sandwiching nut between two pieces 3/32 plywood removable antenna very helpful during trans porting can unscrewed risking chance having accidently knocked off Add radio operators gun pilot naviga tor Check fit glue canopy fuselage Finish The finish original achieved talc dope method would suggest used finishing manner stick method like best just case guide achieving finish talc dope method Sand balsa smooth #320 sandpaper fill dings dents canyons putty mixture dope talcum powder usually mix putty mixture will slowly start fall inverting mixing container Spray brush two coats clear dope bare wood sanding between coat #320 sandpaper Apply SGM medium Silkspan surfaces Silkspan lightly dampened Apply two coats clear dope sand lightly between coat Brush spray mixture dope talcum powder mixture consistency being thinned just enough spray also like add color dope mixture preferably white seems make flaws finish visible Sand #320 sanding talc away Apply two coats filler sand #400 between coat satisfied grain flaws filled add coat 50% thinned dope sand 400 sandpaper time sand water Now finish ready colors dont go too far away talc dope filler flaws really seem jump Out after color coats applied Before color applied fuel proof engine compartments epoxy dress snap cowl fasteners place Aerogloss dope used throughout colors being mostly mixed Military Flats markings used stencils cut drafting mylar spray adhesive pieces cut stencil used cover markings until overall color scheme applied sharks mouth masked masking tape although liquid masking film would probably have less trouble simple technique markings always spray lightest color first colors follows Top Surfaces Light GrayStorm Gray Dark Grayi part Storm Gray 1 part Flat Black WhiteFlat White Yellowi part Cub Yellow 1 part Flat White w/touch Stearman Red RedStearman Red w/touch talc flatten finish BlackFlat Black Bottom Light Bluei part Navy Blue 16 parts Flat White back cover Wings magazine June i972 used guide colors camouflage scheme Flying Pick rather calm day initial flight 1 iO will handle wind its always wise eliminate variables possible Balance model CG marked plans use guide preference original needed no nose tail weight may always case Use ailerons rudders trim used rudder offset about ed work well keeping airplane taut lines low throttle Lightly glue ailerons neutral starting can easily moved give desired results field Until well acquainted flying characteristics model slow landings takeoffs directly wind should avoided Rather should done somewhat perpen dicular wind deflected flaps heading wind model will balloon due excessive lift creating loose line tension OS 25s pull itO no problem best prop arrangement seemed 8x6 inboard 8x4 outboard original weighed just over 5 lbs would fly either engine wouldnt suggest doing some consolation know should other quit during flight Very realistic takeoffs taxis touch-n-gos landings can achieved ii 0 mention bombing missions ay have just one-half fun have model project will have well worth time spent CL Scale/Gretz Continued page 34 full size Lavochkin LA-5 see photo Al Arnolds beautiful model Russians leading fighter bombers World War 2 wood airplane first introduced 1943 very high rate productionsome factories built 50 per day simplification Lavochkins undercarriage interchangeJune 1980 109 MATTER FROM HOBBYPOXY DRESS FOR THE OCCASION Get ready warm RC weather high-quality Tee Shirts BILL EVANS Silkscreened 100% cotten multi-colors theyre available sizes 5 M L XL Choose ELECK RIDER/Yellow ASTRON/Light Blue SIMITAR 540/Tan SEND $695 plus $100 shipping ch1 COREFIIM new instant dry adhesive PA wide 36 yard rolls $895 also offer following high-quality RC kits Simitar Sport Slope Squire Saracen Seville Winterhawk Hot Rock Simitar 540 Write complete brochure fine products x E ng ala strong process Eliminates gaps between control surfaces better performance 35/$189 BILL EVANS ~AIRCRAFT 20825 ROSCOE BLVD CANOGA PARK CA 91306/ TELEPHONE 213 7090894 able YAK series fighters Lavochkins 35 ft wingspan twin-row eighteen cylinder air-cooled engine 1850 hp Top speed 390 mph Armament consisted twin 20mm cannons six 55 lb rockets under wings Another unique feature automatic leading edge slats popped out critical airspeeds eliminate wingtip stalls Al talks about model LA-5 Lavochkin since its completion has won seven first place trophies both flying static competitions An original design adventure build document always draws comments now well known area own personal total airplane wingspan 33 inches weighs 1 lb 12 oz engine has no throttle bad mistake Split flaps actuated aileron bellcranks pushrods internally mounted horn Leading edge slats actuated another set bellcranks rods held open position compression springs until pulled Bomb release nothing simple lynch-pin actuated fifth line model flies great Being light overpowered goes sound scale speed 62 ft lines drag five control lines Model sheeted 1/32 sheet balsa painted mixture Aero Gloss flat dopes An idiosyncrasy real LA-S bounced badly during landings Believe scale aspect original has faithfully duplicated way big ambition now build model improving Lavochkin take Nats Id kind like compete against after its over could sit shade talk about airplanes tell other what did wrong blew last flight last time Nationals held Ohio Dayton 1976 turnout CL Sport Precision Scale nothing short spectacular year Nats scheduled Wilming ton OH excitement could just great Cleveland Dayton Cincinnati have always hotbeds ukie scale activity Chicago Indianapolis New York etc also well within driving range year will have two days flying should eliminate chance repeat last years windy blowout Lincoln live within range Wilmington have entertaining inner thoughts someday coming Natsdo now means bring along model enter Lets hear tired old excuse NATS airplane good enough Bring along give best shot may surprised well can know youll have good time Ed note sure pre register Mike Gretz Box 162 Montezuma IA 50171 CL Speed/Hempel Continued page 35 bag set aside completes engine modification instruc tions suction tank B speed has blessing compared pen bladders past using pen bladders pipe engines would lucky get run per engine comeback tank system has made B speed fun fly once Study drawing construction tank very carefully vary draw ing tank system works exceptionally well designed building tank sure radius bends tubing eliminate flat spots kinks means keep cotton pickin pliers off tubing Check drawing feed tube position Feed tube should soldered approximately 10 degree angle up horizontal Also sure feed tube points straight spray bar elbow may have resolder position elbow match up feed tube tank finished clean inside thoroughly lacquer thinner forget pressure check tank potential leaks next operation fit tank speed pan Use some type hand grinder mill remove unnecessary metal allow placement fuel tank Take special care fuel tank will mount level straight Check height tank does interfere models control system Clean pan thor oughly soap water rinse lacquer thinner alcohol displace moisture will necessary time mount engine pan check tank placement cut-out needle Check Fig 3 detail Use clear silicone adhesive mount tank pan close engine carburetor possible Allow assembly dry thoroughly 24 hours Mount engine-pan assembly model check clearance ram tube distance ram tube fuselage side should approximately 550 inches Drill tap left side pan 4-40 bolt Check placement bolt Fig 3 placement critical bolt place bend 900 forward very carefully intended used cap overflow tube may necessary flow some solder over threads prevent tubing breaking Next drill front engine cowl left sidejust above spinner air-cooling vent required Mount tuned pipe model set 13 inches center glow plug edge pipe now ready test run engine model fill tank remove tubing overflow cap Hold nnse nf model straight up fill through ram tube Allow fuel flow out through overflow tube Slip overflow tubing back over screw cap side pan fuel bulb still ram tube hold model nose down give small squeeze force some fuel venturi prime engine Mount 7 x 10 Rev-Up prop engine Open needle valve 6 turns seat Using electric starter hold nose model down about 30 deg engine starts hold model level Engine should run rich Allow run few seconds tilt nose upward engine rpm should increase dramatically indicates engine has come 110 Model Aviation INDIAN CITY RADIO CONTROL CLUB PRESENTS GREATER MICHIGAN MODELERS SHOW & EXPO II PLANESBOATSCARS MANUFACTURERSS TATIC DISPLAYS 5 WAP SHOP October 34 5 1980 West Eight Mile Artillery Armory Oak Park NKlichigan
Edition: Model Aviation - 1980/06
Page Numbers: 34, 109, 110
Edition: Model Aviation - 1980/06
Page Numbers: 34, 109, 110
C SCALE Mike Gretz IN case havent heard 1980 CL Scale World Championships have heen cancelled deadline contest organizers set final entry commitment interested coun tries recently passed getting sufficient number signed up CL Scale As mentioned March 80 column five coun tries needed stage World Championships time wrote column Dec 79 four countries firmly committed felt fairly confident nation would sign up time didnt work out way Perhaps intense political situations have developed around world since including talk Olympic boycott may have something reluctance new countries sign up Its hard say second time row WC CL Scale event cancelled due political problems apparent lack interest enough FAI participating countries first time 1978 has wonder now what kind mammoth effort might take some future years get CL Scale back WC schedule Just look uphill battle FF Scale enthusiasts country having trying get event World Champion ship status sincerest hope second cancellation will lead similar struggle CL Scale competitors United States have expressed hope someday participating Scale World Championships Al Arnold modeler New Orleans flies unique style CL Scale model might recall have pictured some models before column photo Als Gotha bomber August 79 ModelAviation Albatros D-IIa shown January 80 issue models reflect strong FF Scale influence both size construction style Most small 28 42 wingspan recently sent photos other interesting CL Scale aircraft way Al president Louisiana Scale Squadron club includes FF CL RC scale modelers lumped group has scale common denominator part Al Arnolds letter cut teeth kid rubber FF scale several years thats built first got CL construction techniques knew keep light simple Now find CL models really beefed up FFjobs glow engine control lines Because light over powered model seems fly better heavy underpowered have shown up contests competitive models other guys cant understand Albatros good example 28 wingspan biplane drag flies well 049 Gotha GIV excellent example philosophy applied large model Im telling because people seem think ukie scale ship has heavy good dont Ive mentioned occasions like build CL Scale models larger 40 70 inch wingspan range Now wouldnt want anyone assume therefore disagree Al Arnolds style building came conclusion youve probably missed main point Als own reasoning fact total agreement what makes CL Scale model fly really well build light overpowered Al keeps wing loading down ultra-light construction whereas prefer larger model Someday Im going build small ultra-light ukie scale like Als give arm rest looks like fun Continued page 109 34 Model Aviation Didnt know WW2 DeHavilland Mosquito bombers needle valves Rolls-Royce engines Bill Boss New Hyde Park NY built Precision Scale model took pictures too Mosquito Britains version all-wood fighter-bomber although markings 654th Bomber Squadron USAAF July 1944 models wingspan 62 weighs just under 14 lbs Power two Webra 40s Check out expert landing gear detailing Model features operating flaps bomb bay doors droppable bombs fuel tanks years Nationals competition should see well other magnificent CL scale models flight line Al Arnold uses small engines models uses light built-up Another Al Arnold rendition Soviet airplane Ko construction keep flyable rendition WW2 rean War Red Chinese Mig 15 locally built experimental ductad Russian Lavochkin LA-S fighter-bomber 33 wingspan model fan propels model craft weighs 1/2 lbs has 28 inwingspan has features theoriginalsplit flapsoperational leading edge powered 15 engine Finished Silkspan dope Landry slats bomb drop Photo Frank Landry pic AT LAST SOME PrimerU ndercoater Nowin Weve taken popular two-part white primer-undercoat formula made gray Just gray enough please have told us want see dents nicks ripples re sanding Now make little visible just efficient ever course its still available white too Wood Plastic Metal Fiberglass Hobbypoxy primer-undercoater covers well cures fills fast shrinking easy sand provides smooth-as-glass surface. great adhesion wood plastic metal fiberglass Whether youre balsa builder molded plastic buff whether brush spray it. can now put little color life Hobbypoxy gray undercoat. good ever lot visible complete information how-to-do-it Hobbypoxy Finishing Guide write today AflflhIflAVUA Division Pettit Paint Co Inc H unniruAt PRODUCTS 32 Pine Street Rockaway NJ 07866 HOBBYPOXY ct group finishing products especially formulated hobbyists including Epoxy Glues Epoxy-enamel Paints Fillers Primer-undercoaters Resins canopy always use extreme care glueing Hot Stuff Before canopy permanently glued position several things completed Make antenna sandwiching small 2-56 screw between two pieces 3/32 plywood leaving slightly ads protruding bottom antenna mount made first cutting hole canopy just large enough nut sandwiching nut between two pieces 3/32 plywood removable antenna very helpful during trans porting can unscrewed risking chance having accidently knocked off Add radio operators gun pilot naviga tor Check fit glue canopy fuselage Finish The finish original achieved talc dope method would suggest used finishing manner stick method like best just case guide achieving finish talc dope method Sand balsa smooth #320 sandpaper fill dings dents canyons putty mixture dope talcum powder usually mix putty mixture will slowly start fall inverting mixing container Spray brush two coats clear dope bare wood sanding between coat #320 sandpaper Apply SGM medium Silkspan surfaces Silkspan lightly dampened Apply two coats clear dope sand lightly between coat Brush spray mixture dope talcum powder mixture consistency being thinned just enough spray also like add color dope mixture preferably white seems make flaws finish visible Sand #320 sanding talc away Apply two coats filler sand #400 between coat satisfied grain flaws filled add coat 50% thinned dope sand 400 sandpaper time sand water Now finish ready colors dont go too far away talc dope filler flaws really seem jump Out after color coats applied Before color applied fuel proof engine compartments epoxy dress snap cowl fasteners place Aerogloss dope used throughout colors being mostly mixed Military Flats markings used stencils cut drafting mylar spray adhesive pieces cut stencil used cover markings until overall color scheme applied sharks mouth masked masking tape although liquid masking film would probably have less trouble simple technique markings always spray lightest color first colors follows Top Surfaces Light GrayStorm Gray Dark Grayi part Storm Gray 1 part Flat Black WhiteFlat White Yellowi part Cub Yellow 1 part Flat White w/touch Stearman Red RedStearman Red w/touch talc flatten finish BlackFlat Black Bottom Light Bluei part Navy Blue 16 parts Flat White back cover Wings magazine June i972 used guide colors camouflage scheme Flying Pick rather calm day initial flight 1 iO will handle wind its always wise eliminate variables possible Balance model CG marked plans use guide preference original needed no nose tail weight may always case Use ailerons rudders trim used rudder offset about ed work well keeping airplane taut lines low throttle Lightly glue ailerons neutral starting can easily moved give desired results field Until well acquainted flying characteristics model slow landings takeoffs directly wind should avoided Rather should done somewhat perpen dicular wind deflected flaps heading wind model will balloon due excessive lift creating loose line tension OS 25s pull itO no problem best prop arrangement seemed 8x6 inboard 8x4 outboard original weighed just over 5 lbs would fly either engine wouldnt suggest doing some consolation know should other quit during flight Very realistic takeoffs taxis touch-n-gos landings can achieved ii 0 mention bombing missions ay have just one-half fun have model project will have well worth time spent CL Scale/Gretz Continued page 34 full size Lavochkin LA-5 see photo Al Arnolds beautiful model Russians leading fighter bombers World War 2 wood airplane first introduced 1943 very high rate productionsome factories built 50 per day simplification Lavochkins undercarriage interchangeJune 1980 109 MATTER FROM HOBBYPOXY DRESS FOR THE OCCASION Get ready warm RC weather high-quality Tee Shirts BILL EVANS Silkscreened 100% cotten multi-colors theyre available sizes 5 M L XL Choose ELECK RIDER/Yellow ASTRON/Light Blue SIMITAR 540/Tan SEND $695 plus $100 shipping ch1 COREFIIM new instant dry adhesive PA wide 36 yard rolls $895 also offer following high-quality RC kits Simitar Sport Slope Squire Saracen Seville Winterhawk Hot Rock Simitar 540 Write complete brochure fine products x E ng ala strong process Eliminates gaps between control surfaces better performance 35/$189 BILL EVANS ~AIRCRAFT 20825 ROSCOE BLVD CANOGA PARK CA 91306/ TELEPHONE 213 7090894 able YAK series fighters Lavochkins 35 ft wingspan twin-row eighteen cylinder air-cooled engine 1850 hp Top speed 390 mph Armament consisted twin 20mm cannons six 55 lb rockets under wings Another unique feature automatic leading edge slats popped out critical airspeeds eliminate wingtip stalls Al talks about model LA-5 Lavochkin since its completion has won seven first place trophies both flying static competitions An original design adventure build document always draws comments now well known area own personal total airplane wingspan 33 inches weighs 1 lb 12 oz engine has no throttle bad mistake Split flaps actuated aileron bellcranks pushrods internally mounted horn Leading edge slats actuated another set bellcranks rods held open position compression springs until pulled Bomb release nothing simple lynch-pin actuated fifth line model flies great Being light overpowered goes sound scale speed 62 ft lines drag five control lines Model sheeted 1/32 sheet balsa painted mixture Aero Gloss flat dopes An idiosyncrasy real LA-S bounced badly during landings Believe scale aspect original has faithfully duplicated way big ambition now build model improving Lavochkin take Nats Id kind like compete against after its over could sit shade talk about airplanes tell other what did wrong blew last flight last time Nationals held Ohio Dayton 1976 turnout CL Sport Precision Scale nothing short spectacular year Nats scheduled Wilming ton OH excitement could just great Cleveland Dayton Cincinnati have always hotbeds ukie scale activity Chicago Indianapolis New York etc also well within driving range year will have two days flying should eliminate chance repeat last years windy blowout Lincoln live within range Wilmington have entertaining inner thoughts someday coming Natsdo now means bring along model enter Lets hear tired old excuse NATS airplane good enough Bring along give best shot may surprised well can know youll have good time Ed note sure pre register Mike Gretz Box 162 Montezuma IA 50171 CL Speed/Hempel Continued page 35 bag set aside completes engine modification instruc tions suction tank B speed has blessing compared pen bladders past using pen bladders pipe engines would lucky get run per engine comeback tank system has made B speed fun fly once Study drawing construction tank very carefully vary draw ing tank system works exceptionally well designed building tank sure radius bends tubing eliminate flat spots kinks means keep cotton pickin pliers off tubing Check drawing feed tube position Feed tube should soldered approximately 10 degree angle up horizontal Also sure feed tube points straight spray bar elbow may have resolder position elbow match up feed tube tank finished clean inside thoroughly lacquer thinner forget pressure check tank potential leaks next operation fit tank speed pan Use some type hand grinder mill remove unnecessary metal allow placement fuel tank Take special care fuel tank will mount level straight Check height tank does interfere models control system Clean pan thor oughly soap water rinse lacquer thinner alcohol displace moisture will necessary time mount engine pan check tank placement cut-out needle Check Fig 3 detail Use clear silicone adhesive mount tank pan close engine carburetor possible Allow assembly dry thoroughly 24 hours Mount engine-pan assembly model check clearance ram tube distance ram tube fuselage side should approximately 550 inches Drill tap left side pan 4-40 bolt Check placement bolt Fig 3 placement critical bolt place bend 900 forward very carefully intended used cap overflow tube may necessary flow some solder over threads prevent tubing breaking Next drill front engine cowl left sidejust above spinner air-cooling vent required Mount tuned pipe model set 13 inches center glow plug edge pipe now ready test run engine model fill tank remove tubing overflow cap Hold nnse nf model straight up fill through ram tube Allow fuel flow out through overflow tube Slip overflow tubing back over screw cap side pan fuel bulb still ram tube hold model nose down give small squeeze force some fuel venturi prime engine Mount 7 x 10 Rev-Up prop engine Open needle valve 6 turns seat Using electric starter hold nose model down about 30 deg engine starts hold model level Engine should run rich Allow run few seconds tilt nose upward engine rpm should increase dramatically indicates engine has come 110 Model Aviation INDIAN CITY RADIO CONTROL CLUB PRESENTS GREATER MICHIGAN MODELERS SHOW & EXPO II PLANESBOATSCARS MANUFACTURERSS TATIC DISPLAYS 5 WAP SHOP October 34 5 1980 West Eight Mile Artillery Armory Oak Park NKlichigan
Edition: Model Aviation - 1980/06
Page Numbers: 34, 109, 110
C SCALE Mike Gretz IN case havent heard 1980 CL Scale World Championships have heen cancelled deadline contest organizers set final entry commitment interested coun tries recently passed getting sufficient number signed up CL Scale As mentioned March 80 column five coun tries needed stage World Championships time wrote column Dec 79 four countries firmly committed felt fairly confident nation would sign up time didnt work out way Perhaps intense political situations have developed around world since including talk Olympic boycott may have something reluctance new countries sign up Its hard say second time row WC CL Scale event cancelled due political problems apparent lack interest enough FAI participating countries first time 1978 has wonder now what kind mammoth effort might take some future years get CL Scale back WC schedule Just look uphill battle FF Scale enthusiasts country having trying get event World Champion ship status sincerest hope second cancellation will lead similar struggle CL Scale competitors United States have expressed hope someday participating Scale World Championships Al Arnold modeler New Orleans flies unique style CL Scale model might recall have pictured some models before column photo Als Gotha bomber August 79 ModelAviation Albatros D-IIa shown January 80 issue models reflect strong FF Scale influence both size construction style Most small 28 42 wingspan recently sent photos other interesting CL Scale aircraft way Al president Louisiana Scale Squadron club includes FF CL RC scale modelers lumped group has scale common denominator part Al Arnolds letter cut teeth kid rubber FF scale several years thats built first got CL construction techniques knew keep light simple Now find CL models really beefed up FFjobs glow engine control lines Because light over powered model seems fly better heavy underpowered have shown up contests competitive models other guys cant understand Albatros good example 28 wingspan biplane drag flies well 049 Gotha GIV excellent example philosophy applied large model Im telling because people seem think ukie scale ship has heavy good dont Ive mentioned occasions like build CL Scale models larger 40 70 inch wingspan range Now wouldnt want anyone assume therefore disagree Al Arnolds style building came conclusion youve probably missed main point Als own reasoning fact total agreement what makes CL Scale model fly really well build light overpowered Al keeps wing loading down ultra-light construction whereas prefer larger model Someday Im going build small ultra-light ukie scale like Als give arm rest looks like fun Continued page 109 34 Model Aviation Didnt know WW2 DeHavilland Mosquito bombers needle valves Rolls-Royce engines Bill Boss New Hyde Park NY built Precision Scale model took pictures too Mosquito Britains version all-wood fighter-bomber although markings 654th Bomber Squadron USAAF July 1944 models wingspan 62 weighs just under 14 lbs Power two Webra 40s Check out expert landing gear detailing Model features operating flaps bomb bay doors droppable bombs fuel tanks years Nationals competition should see well other magnificent CL scale models flight line Al Arnold uses small engines models uses light built-up Another Al Arnold rendition Soviet airplane Ko construction keep flyable rendition WW2 rean War Red Chinese Mig 15 locally built experimental ductad Russian Lavochkin LA-S fighter-bomber 33 wingspan model fan propels model craft weighs 1/2 lbs has 28 inwingspan has features theoriginalsplit flapsoperational leading edge powered 15 engine Finished Silkspan dope Landry slats bomb drop Photo Frank Landry pic AT LAST SOME PrimerU ndercoater Nowin Weve taken popular two-part white primer-undercoat formula made gray Just gray enough please have told us want see dents nicks ripples re sanding Now make little visible just efficient ever course its still available white too Wood Plastic Metal Fiberglass Hobbypoxy primer-undercoater covers well cures fills fast shrinking easy sand provides smooth-as-glass surface. great adhesion wood plastic metal fiberglass Whether youre balsa builder molded plastic buff whether brush spray it. can now put little color life Hobbypoxy gray undercoat. good ever lot visible complete information how-to-do-it Hobbypoxy Finishing Guide write today AflflhIflAVUA Division Pettit Paint Co Inc H unniruAt PRODUCTS 32 Pine Street Rockaway NJ 07866 HOBBYPOXY ct group finishing products especially formulated hobbyists including Epoxy Glues Epoxy-enamel Paints Fillers Primer-undercoaters Resins canopy always use extreme care glueing Hot Stuff Before canopy permanently glued position several things completed Make antenna sandwiching small 2-56 screw between two pieces 3/32 plywood leaving slightly ads protruding bottom antenna mount made first cutting hole canopy just large enough nut sandwiching nut between two pieces 3/32 plywood removable antenna very helpful during trans porting can unscrewed risking chance having accidently knocked off Add radio operators gun pilot naviga tor Check fit glue canopy fuselage Finish The finish original achieved talc dope method would suggest used finishing manner stick method like best just case guide achieving finish talc dope method Sand balsa smooth #320 sandpaper fill dings dents canyons putty mixture dope talcum powder usually mix putty mixture will slowly start fall inverting mixing container Spray brush two coats clear dope bare wood sanding between coat #320 sandpaper Apply SGM medium Silkspan surfaces Silkspan lightly dampened Apply two coats clear dope sand lightly between coat Brush spray mixture dope talcum powder mixture consistency being thinned just enough spray also like add color dope mixture preferably white seems make flaws finish visible Sand #320 sanding talc away Apply two coats filler sand #400 between coat satisfied grain flaws filled add coat 50% thinned dope sand 400 sandpaper time sand water Now finish ready colors dont go too far away talc dope filler flaws really seem jump Out after color coats applied Before color applied fuel proof engine compartments epoxy dress snap cowl fasteners place Aerogloss dope used throughout colors being mostly mixed Military Flats markings used stencils cut drafting mylar spray adhesive pieces cut stencil used cover markings until overall color scheme applied sharks mouth masked masking tape although liquid masking film would probably have less trouble simple technique markings always spray lightest color first colors follows Top Surfaces Light GrayStorm Gray Dark Grayi part Storm Gray 1 part Flat Black WhiteFlat White Yellowi part Cub Yellow 1 part Flat White w/touch Stearman Red RedStearman Red w/touch talc flatten finish BlackFlat Black Bottom Light Bluei part Navy Blue 16 parts Flat White back cover Wings magazine June i972 used guide colors camouflage scheme Flying Pick rather calm day initial flight 1 iO will handle wind its always wise eliminate variables possible Balance model CG marked plans use guide preference original needed no nose tail weight may always case Use ailerons rudders trim used rudder offset about ed work well keeping airplane taut lines low throttle Lightly glue ailerons neutral starting can easily moved give desired results field Until well acquainted flying characteristics model slow landings takeoffs directly wind should avoided Rather should done somewhat perpen dicular wind deflected flaps heading wind model will balloon due excessive lift creating loose line tension OS 25s pull itO no problem best prop arrangement seemed 8x6 inboard 8x4 outboard original weighed just over 5 lbs would fly either engine wouldnt suggest doing some consolation know should other quit during flight Very realistic takeoffs taxis touch-n-gos landings can achieved ii 0 mention bombing missions ay have just one-half fun have model project will have well worth time spent CL Scale/Gretz Continued page 34 full size Lavochkin LA-5 see photo Al Arnolds beautiful model Russians leading fighter bombers World War 2 wood airplane first introduced 1943 very high rate productionsome factories built 50 per day simplification Lavochkins undercarriage interchangeJune 1980 109 MATTER FROM HOBBYPOXY DRESS FOR THE OCCASION Get ready warm RC weather high-quality Tee Shirts BILL EVANS Silkscreened 100% cotten multi-colors theyre available sizes 5 M L XL Choose ELECK RIDER/Yellow ASTRON/Light Blue SIMITAR 540/Tan SEND $695 plus $100 shipping ch1 COREFIIM new instant dry adhesive PA wide 36 yard rolls $895 also offer following high-quality RC kits Simitar Sport Slope Squire Saracen Seville Winterhawk Hot Rock Simitar 540 Write complete brochure fine products x E ng ala strong process Eliminates gaps between control surfaces better performance 35/$189 BILL EVANS ~AIRCRAFT 20825 ROSCOE BLVD CANOGA PARK CA 91306/ TELEPHONE 213 7090894 able YAK series fighters Lavochkins 35 ft wingspan twin-row eighteen cylinder air-cooled engine 1850 hp Top speed 390 mph Armament consisted twin 20mm cannons six 55 lb rockets under wings Another unique feature automatic leading edge slats popped out critical airspeeds eliminate wingtip stalls Al talks about model LA-5 Lavochkin since its completion has won seven first place trophies both flying static competitions An original design adventure build document always draws comments now well known area own personal total airplane wingspan 33 inches weighs 1 lb 12 oz engine has no throttle bad mistake Split flaps actuated aileron bellcranks pushrods internally mounted horn Leading edge slats actuated another set bellcranks rods held open position compression springs until pulled Bomb release nothing simple lynch-pin actuated fifth line model flies great Being light overpowered goes sound scale speed 62 ft lines drag five control lines Model sheeted 1/32 sheet balsa painted mixture Aero Gloss flat dopes An idiosyncrasy real LA-S bounced badly during landings Believe scale aspect original has faithfully duplicated way big ambition now build model improving Lavochkin take Nats Id kind like compete against after its over could sit shade talk about airplanes tell other what did wrong blew last flight last time Nationals held Ohio Dayton 1976 turnout CL Sport Precision Scale nothing short spectacular year Nats scheduled Wilming ton OH excitement could just great Cleveland Dayton Cincinnati have always hotbeds ukie scale activity Chicago Indianapolis New York etc also well within driving range year will have two days flying should eliminate chance repeat last years windy blowout Lincoln live within range Wilmington have entertaining inner thoughts someday coming Natsdo now means bring along model enter Lets hear tired old excuse NATS airplane good enough Bring along give best shot may surprised well can know youll have good time Ed note sure pre register Mike Gretz Box 162 Montezuma IA 50171 CL Speed/Hempel Continued page 35 bag set aside completes engine modification instruc tions suction tank B speed has blessing compared pen bladders past using pen bladders pipe engines would lucky get run per engine comeback tank system has made B speed fun fly once Study drawing construction tank very carefully vary draw ing tank system works exceptionally well designed building tank sure radius bends tubing eliminate flat spots kinks means keep cotton pickin pliers off tubing Check drawing feed tube position Feed tube should soldered approximately 10 degree angle up horizontal Also sure feed tube points straight spray bar elbow may have resolder position elbow match up feed tube tank finished clean inside thoroughly lacquer thinner forget pressure check tank potential leaks next operation fit tank speed pan Use some type hand grinder mill remove unnecessary metal allow placement fuel tank Take special care fuel tank will mount level straight Check height tank does interfere models control system Clean pan thor oughly soap water rinse lacquer thinner alcohol displace moisture will necessary time mount engine pan check tank placement cut-out needle Check Fig 3 detail Use clear silicone adhesive mount tank pan close engine carburetor possible Allow assembly dry thoroughly 24 hours Mount engine-pan assembly model check clearance ram tube distance ram tube fuselage side should approximately 550 inches Drill tap left side pan 4-40 bolt Check placement bolt Fig 3 placement critical bolt place bend 900 forward very carefully intended used cap overflow tube may necessary flow some solder over threads prevent tubing breaking Next drill front engine cowl left sidejust above spinner air-cooling vent required Mount tuned pipe model set 13 inches center glow plug edge pipe now ready test run engine model fill tank remove tubing overflow cap Hold nnse nf model straight up fill through ram tube Allow fuel flow out through overflow tube Slip overflow tubing back over screw cap side pan fuel bulb still ram tube hold model nose down give small squeeze force some fuel venturi prime engine Mount 7 x 10 Rev-Up prop engine Open needle valve 6 turns seat Using electric starter hold nose model down about 30 deg engine starts hold model level Engine should run rich Allow run few seconds tilt nose upward engine rpm should increase dramatically indicates engine has come 110 Model Aviation INDIAN CITY RADIO CONTROL CLUB PRESENTS GREATER MICHIGAN MODELERS SHOW & EXPO II PLANESBOATSCARS MANUFACTURERSS TATIC DISPLAYS 5 WAP SHOP October 34 5 1980 West Eight Mile Artillery Armory Oak Park NKlichigan
