CONTROL LINE AEROBATICS ACCURATELY BUILT MODELS FLY BETTER No has built flying models will dispute its difficult quantify focus broad statement know no such thing absolute accuracy accuracy takes time can increase costs So far does go trying achieve ultimateand what ultimate Paul Walker once wrote could tell airplane misaligned /s4 inch Now thats lot dimension bigger problems often result accumulation small errors practicality standpoint should try construct subassemblies wing tail fuselage fixtures jigs reference flat true surfaces better fixture automatic accuracy piece Lets look fuselage jigs Generally provide flat base inscribed centerline sliders hold sides formers alignment Wing jigs have evolved several different forms tube-or rod- suspension types Hunt lost-foam-cradle method tail surfaces constructed flat surface using traditional methods resulting pieces must assembled airplane Most versions final assembly involve large fiat platform usually leveled hard surface center hinge lines inscribed platform used reference measure perpendicularity incidence enough care proper methods will result accurate airframe Constructing unit jig however does necessarily generate accurate unit subtleties construction can cause major problems Once potential trouble spots understood theyre relatively easy avoid discussion prompted conversation friend said built wings jigs hadnt successful building straight key point avoid putting stress structure assemble jig underlying principle make part fit accurately Several years ago constructing built-up wing using tubes-through-the-ribs method tubes 3/s-inch aircraft tubing sighting through tubes could shimmed few thousandths Construction proceeded routinelythe ribs trued up using long sanding block leading- trailing-edge planking installed As aside ribs wing made using timehonored sandwich method Although did result useable ribs found severely beveled leading edge problem adhering leading-edge planking reinforce ribs provide enough gluing area recommendation would use sandwich ribs patterns make useable ribs outside edge reference will use extra wood will result satisfactory wing accurate ribs use lost-foam method Up point wing jig dead 48-inch straightedge placed surface proved planked center section proceeded capstrips finished found induced warp trailing edge happened before gave wing shot ammonia figured would settle back true dried didnt work Next cut off capstrips affected panel remembered Id aggressive fitting first set capstripsI fitted bit long pushed down adhere makes very tight joint leading/trailing edge However puts pressure wing away rigid part structurein case leading edge warped trailing edge possible cap wing top bottom rib time wouldnt problem usually isnt possible technique very carefully fit capstrips glued position virtually no contact leading/trailing edges ideal situation joint joining surfaces smooth contact pressure does practice prevent warps also results best glue joints April 1996 107 Sibling rivalry Ryan Maft Spoula competed Beginner class well-attended Peoria Wyre Flyers contest beautiful deBolt Stuntwagon Noel Drindak 46-ounce Sam Sciorrattas Popeye captured Peoria Stunt contest model flies very well Woolard Fox 40 Sam up-and-coming flier Illinois area GET YOUR FINGERS AWAY FROM THE PROP WITH ATLANTIC R/C MIXTURE VALVES Atlantic Mixture Valve worked beautifully answer problems Clarence Lee A/C Modeler Remote Mixture Valve Works like remote needle valve Mounts anywhere Eliminates need needle valve extensions holes cowl needle valve Guaranteed glow $495 engines using medium iubing Remote mixture valve large tubing $650 In-Flight Mixture Valve.$695 Get engine running perfectly ft counts air Also in-flight engine shutoff smoke valve Guaranteed glow engines using medium fuel tubing Servo required In-f light mixture valve large tubing $850 Full refund satisfied either valve Guarantee valid direct sales Both patented Newthe LeakCatchertm tank isoiator.Free purchase free teakCatdier per order Additional LealiCatchers $195 Contains tank fuel line leaks dont have fuelproof tank area Eases tank installationrPatent pendiog price canl afford 10 protect valusbie model fuel damage Leaks trapped plastic bag sealed 116 hole firewall rubber compression ring Keeps fuel oil firewall out fuselage use glow fuel 13/16 drill bit drilling hole required LeakCatcher works best power drill Insta-cure thin CA Insta-cure filling CA 1 oz $350 2 oz $595 Quik-cure 5 mm epoxy Slow-cure 30 mm epoxy 9 Oz $895 Shipped us Can order call 800 7654474 Visa & MC accept Please add $300 shipping handling per order ee 5&li outiode USer Canada send check MO Atlantic R/C Products Inc P0 Box 523007 Springfield VA 22152 vA maidents please add 45% sales isa Dealer quiriea iovited method has benefits close fitting joint stronger less glue necessaryresulting weight savings best ways reduce weight taking out materials Remember fitting joint important areas such spar slots very important alignment weight reduction method recommend create special-purpose sanding tools specific openings spar openings took section 220 garnet sandpaper material glued edge /i6 X piece spar material After material set trimmed knife sanded long 3/s edge smooth perpendicular sandpaper edge Now tool precision-fit slot spar assembled wing much investment time vast increase precision snmmarize Strive highest degree accuracy possible Use jigs fixtures assemble airplane Pay particular attention fit of jointsthis will minimize stress warps provide higher strength reduced weight Easy-to-make specialpurpose sanding tools can make precision fits much easier Tech Tips month have couple tips noted modelers Bill Werwage Bob Hunt have mentioned before part much larger body informationthey work well need surface again Have ever wondered complex open-bay structures get buffed out beautiful finish takes plenty time sand surface matte finish difficult part comes edges open bays get careless youll go through paint and/or paper necessitating repair Its hard keep going things difficult timeconsuming Enter Bill Werwages suggestion Use high-quality 0000 steel wool Furniture makers use fine wood furniture first use steel wool youll think have ruined surface scratches Keep going scratches will out nice smooth surface will buff out fine compound Turn pad frequently keep fresh work surface little practice will become comfortable youll wonder ever achieved good finish Thanks Bill sharing some later plans Bob Hunt shows trick shaping blocks precisely fit attached surfaces such vertical stabilizers scoops cowls first mentioned sounded too easy later tried wished used sooner Trace footprint part onto ih2 plywood cut out Make sure have reference lines help position plywood block block should almost ready its final rough sanding Tack-glue plywood block exact location Rough-in plywood surrounding surface 80-grit sandpaper rounded blocks Work progressively finer sandpaper until youre satisfied Remember Youre trying achieve smooth blend line surface idea minimize filleting material reduce weight airplane trick really works wellgive try Thanks Bob Model Aviation RAFT SPEEDMA S TER Aircraft Speedmaster new technology aircraft speed measurement Designed safety convenience mind Speedmaster allows safe speed measurement separating aircraft line flight pilot unit measures speeds 10 mph 300 mph completely self-contained powered standard 9 volt alkaline cell No calibration Speedmaster system ever needed will maintain equivalent stability digital watch over life unit Speedmaster system chipped its own transport case measuring 6 x 12 x 16 weights 10 lbs Price $495 plus shipping RC Research Manufacturing 550 Primrose Odessa TX 79765 550-2413
Edition: Model Aviation - 1996/04
Page Numbers: 107, 108
Edition: Model Aviation - 1996/04
Page Numbers: 107, 108
CONTROL LINE AEROBATICS ACCURATELY BUILT MODELS FLY BETTER No has built flying models will dispute its difficult quantify focus broad statement know no such thing absolute accuracy accuracy takes time can increase costs So far does go trying achieve ultimateand what ultimate Paul Walker once wrote could tell airplane misaligned /s4 inch Now thats lot dimension bigger problems often result accumulation small errors practicality standpoint should try construct subassemblies wing tail fuselage fixtures jigs reference flat true surfaces better fixture automatic accuracy piece Lets look fuselage jigs Generally provide flat base inscribed centerline sliders hold sides formers alignment Wing jigs have evolved several different forms tube-or rod- suspension types Hunt lost-foam-cradle method tail surfaces constructed flat surface using traditional methods resulting pieces must assembled airplane Most versions final assembly involve large fiat platform usually leveled hard surface center hinge lines inscribed platform used reference measure perpendicularity incidence enough care proper methods will result accurate airframe Constructing unit jig however does necessarily generate accurate unit subtleties construction can cause major problems Once potential trouble spots understood theyre relatively easy avoid discussion prompted conversation friend said built wings jigs hadnt successful building straight key point avoid putting stress structure assemble jig underlying principle make part fit accurately Several years ago constructing built-up wing using tubes-through-the-ribs method tubes 3/s-inch aircraft tubing sighting through tubes could shimmed few thousandths Construction proceeded routinelythe ribs trued up using long sanding block leading- trailing-edge planking installed As aside ribs wing made using timehonored sandwich method Although did result useable ribs found severely beveled leading edge problem adhering leading-edge planking reinforce ribs provide enough gluing area recommendation would use sandwich ribs patterns make useable ribs outside edge reference will use extra wood will result satisfactory wing accurate ribs use lost-foam method Up point wing jig dead 48-inch straightedge placed surface proved planked center section proceeded capstrips finished found induced warp trailing edge happened before gave wing shot ammonia figured would settle back true dried didnt work Next cut off capstrips affected panel remembered Id aggressive fitting first set capstripsI fitted bit long pushed down adhere makes very tight joint leading/trailing edge However puts pressure wing away rigid part structurein case leading edge warped trailing edge possible cap wing top bottom rib time wouldnt problem usually isnt possible technique very carefully fit capstrips glued position virtually no contact leading/trailing edges ideal situation joint joining surfaces smooth contact pressure does practice prevent warps also results best glue joints April 1996 107 Sibling rivalry Ryan Maft Spoula competed Beginner class well-attended Peoria Wyre Flyers contest beautiful deBolt Stuntwagon Noel Drindak 46-ounce Sam Sciorrattas Popeye captured Peoria Stunt contest model flies very well Woolard Fox 40 Sam up-and-coming flier Illinois area GET YOUR FINGERS AWAY FROM THE PROP WITH ATLANTIC R/C MIXTURE VALVES Atlantic Mixture Valve worked beautifully answer problems Clarence Lee A/C Modeler Remote Mixture Valve Works like remote needle valve Mounts anywhere Eliminates need needle valve extensions holes cowl needle valve Guaranteed glow $495 engines using medium iubing Remote mixture valve large tubing $650 In-Flight Mixture Valve.$695 Get engine running perfectly ft counts air Also in-flight engine shutoff smoke valve Guaranteed glow engines using medium fuel tubing Servo required In-f light mixture valve large tubing $850 Full refund satisfied either valve Guarantee valid direct sales Both patented Newthe LeakCatchertm tank isoiator.Free purchase free teakCatdier per order Additional LealiCatchers $195 Contains tank fuel line leaks dont have fuelproof tank area Eases tank installationrPatent pendiog price canl afford 10 protect valusbie model fuel damage Leaks trapped plastic bag sealed 116 hole firewall rubber compression ring Keeps fuel oil firewall out fuselage use glow fuel 13/16 drill bit drilling hole required LeakCatcher works best power drill Insta-cure thin CA Insta-cure filling CA 1 oz $350 2 oz $595 Quik-cure 5 mm epoxy Slow-cure 30 mm epoxy 9 Oz $895 Shipped us Can order call 800 7654474 Visa & MC accept Please add $300 shipping handling per order ee 5&li outiode USer Canada send check MO Atlantic R/C Products Inc P0 Box 523007 Springfield VA 22152 vA maidents please add 45% sales isa Dealer quiriea iovited method has benefits close fitting joint stronger less glue necessaryresulting weight savings best ways reduce weight taking out materials Remember fitting joint important areas such spar slots very important alignment weight reduction method recommend create special-purpose sanding tools specific openings spar openings took section 220 garnet sandpaper material glued edge /i6 X piece spar material After material set trimmed knife sanded long 3/s edge smooth perpendicular sandpaper edge Now tool precision-fit slot spar assembled wing much investment time vast increase precision snmmarize Strive highest degree accuracy possible Use jigs fixtures assemble airplane Pay particular attention fit of jointsthis will minimize stress warps provide higher strength reduced weight Easy-to-make specialpurpose sanding tools can make precision fits much easier Tech Tips month have couple tips noted modelers Bill Werwage Bob Hunt have mentioned before part much larger body informationthey work well need surface again Have ever wondered complex open-bay structures get buffed out beautiful finish takes plenty time sand surface matte finish difficult part comes edges open bays get careless youll go through paint and/or paper necessitating repair Its hard keep going things difficult timeconsuming Enter Bill Werwages suggestion Use high-quality 0000 steel wool Furniture makers use fine wood furniture first use steel wool youll think have ruined surface scratches Keep going scratches will out nice smooth surface will buff out fine compound Turn pad frequently keep fresh work surface little practice will become comfortable youll wonder ever achieved good finish Thanks Bill sharing some later plans Bob Hunt shows trick shaping blocks precisely fit attached surfaces such vertical stabilizers scoops cowls first mentioned sounded too easy later tried wished used sooner Trace footprint part onto ih2 plywood cut out Make sure have reference lines help position plywood block block should almost ready its final rough sanding Tack-glue plywood block exact location Rough-in plywood surrounding surface 80-grit sandpaper rounded blocks Work progressively finer sandpaper until youre satisfied Remember Youre trying achieve smooth blend line surface idea minimize filleting material reduce weight airplane trick really works wellgive try Thanks Bob Model Aviation RAFT SPEEDMA S TER Aircraft Speedmaster new technology aircraft speed measurement Designed safety convenience mind Speedmaster allows safe speed measurement separating aircraft line flight pilot unit measures speeds 10 mph 300 mph completely self-contained powered standard 9 volt alkaline cell No calibration Speedmaster system ever needed will maintain equivalent stability digital watch over life unit Speedmaster system chipped its own transport case measuring 6 x 12 x 16 weights 10 lbs Price $495 plus shipping RC Research Manufacturing 550 Primrose Odessa TX 79765 550-2413
