NEW season coming Only few areas have indoor flying year around us have wait cooler months before seriously planning indoor activity time ap proaching contests flying sessions will begin planning time now number different indoor activities add spice interest lets examine few Postal Contests model airplane contests conducted mailthat club indi vidual entered will fly events local site under conditions agreed upon participants results mailed originating group sponsor times compared winners notified mail nothing like having wait three weeks longer find out won contest kind flying often takes place during winter months few die-hards have access indoor sites year around no shows up flying sessions during summer try postal meets can still have some competition flys postal meets know some another area send invitation challenge depending good think see will take Otherwise may read postal meets club newsletters similar sources Finally clubs indi viduals wish try postal flying may write column declare intent someone has made similar offer can get together challenge invitation will pub lished next available column along address telephone number wish No telephone numbers will published specific permission Lets try outall can lose time takes write results various matches can published maybe will have some extra fun Some Postal Guidelines invitations should specific model class some range ceiling heights NIMAS National Indoor Model Airplane Society has conducted annual postal meet using fudge factors allow comparison between times flown under different ceiling heights interest postal flying via column will printed about fudge factors need arises about Start Cat Pennyplane con tests Almost everyone has Cat site available Pennyplanes Easy Bs popular models Since AMA Rule Book deliberately vague about some aspects Easy B rules sure specify what mean Easy B model Ceiling Dodgers times contest won model can maintain its cool scrubbing flat ceiling banging around rafters has noted such flying like picking best thermals outdoor FF events So disqualify model touches ceiling part building structure such way climb portion flight prolonged takes really good model well adjusted skillfully flown win under no touch rules prop/rubber combination whole new setup really good fliers find new dimension flying such contest Note indoor model can used Ceiling Dodgers fit model choice site holding event can specify certain model type design fit event needs group look another way ceiling dodging concept will also make otherwise poor site fairly acceptable reality indoor HLGs no touch modelseven just brush ceiling light flight nearly always spoiled Special Events about Matchbox Con test concept calls careful design construction plus clever ideas Any model will fit standard box common kitchen matches eligible Depending upon sets up rules model parts must fit box assembled model must fit box Under assembled category helicopters very low aspect-ratio rubber-powered models have done well catapult glider built matchbox event lot fun difficult adjust smallest piece indoor rubber available giider moves fast release vanishes sight has get someone else launch model possible observe trajec tory decide what adjustments need made Parlor Mites parlor contests parlor mite basically 10 span model intended flown homes very small sites may have number various rules depending holds event Micro-X PO Box 1063 Lorain OH 44055 has kit furnishes materials three such models differing design kit could basis formula contest guaranteed liven up model club party San Diego Orbiteers have similar class despite fairly stringent rules often has flights exceeding three minutes recreation center gymnasium rules A-6 class 1 Wing area 30 sq maximum 2 Motor stick length prop diameter 6 maximum 3 materials readily available hobby shops 4 wood strip 1/16 sq minimum sheet balsa parts made 1/32 minimum thickness 5 Wing rib depth 1/16 minimum wing covering tissue models rubber-powered 6 Prop can unmodified commercial plastic built flat sheet balsa blades mounted 1/8-in square hub 7 Prop shaft 1/32 diameter wire thrust bearing 1/16 diameter aluminum tubing Orbiteers intended A-6 model group activity club rather project rank beginner same time beginner groups experienced guidance can well A-6 design model building classes Thirty-Minute Glider No Stan Stoy hasnt Continued page 126 48 Model Aviation Left Not prop blocks expensivel styrofoam block has some drawbacks convenience outweighs Credit Bob Lieber idea photo Right Stan Chiltons ultimate indoor scale0 Haus Triple Beam Balance sensitive 00017 oz does change humidity like homemade scales Expensive very convenient Tell-all picture beautiful scale work taken Stan Winning Ideas FOURMOST FUEL FITTING SETS Large Fuel Fitting Set cSize % IDPRICE S150 1 Tee 1 Elbow 1 Union 1 Plug Both Made Fuel Proof Polyethylene Small Fuel Fitting Set Size A6 10PRICE S125 1 Tee 2 Elbows 1 Pen Bladder Tee FUEL MANIFOLD This Manifold Provides Convenient Method Tank Filling Draining Priming %2 10PRICE 95 1 Scale 1931 Gee Bee Super Sportster IGeneral Arrange ment Drawing Catalog 25cBy W T Bill Given ERNISTIC MODELS PO BOX 6974 ALBUQ NM 87197 lated mild chuck article claims control characteristics can simulated too cutting away control surface taping back deflected position author cites cases unusual characteristics cures predicted small chuck-glider tests later confirmed expensive wind-tunnel tests RC model programs course models must accurately constructed attention must paid accuracy incidence angles CG positions model must launched proper flight attitude speed wonder dont use technique design aid free-flight competition sport models has done course isnt done very often reason bunch copy cats Basic area ratios moment arms dihedral angles CG positions have pretty well standardized before trying something really newa T-tail negative dihe dral stab canard winglets whateverwouldnt pay spend hour two doing bit cutand-try chuck glider first Certainly FF Scale modelers should able profit technique except perhaps few blessed nack being able make fool thing fly Hello Bill Warner course technique shouldnt work Reynolds Number thatbut ap parently does recently built model absolutely unstable Perhaps bi-stable would accurate description perfectly stable either normal glide near-vertical dive model wasnt far out should have flown well didnt might have profited technique shouldnt work does OHLG DT forms dethermalizers have 0491051 AIR FLO ENGINE MOUNT REDUCES DRAG VIBRATION FREE PRICE 250 FUEL SHUTOFF Can Used Control Fuel Flow Starting jPositive Airborn Shutoff PRICE 350 C FLASH STARTING SUNEXCELLER POWER S LONGER LIFE SLOWEST DRAIN GLOW PLUGS SWANSON ASSOCIATES gte P0 309 SI WAYNE N W JERSEY 69 ROUTE 29PEOIJANROcE 9W IERS used outdoor hand-launch gliders cluding drag brakes fold-down rudder drop-off nose weight pop-up stab popularized Bill Blanchard See Polly article May issue Bills scheme employed him others decade works just great some fliers prefer mount stabilizer bottom fuselage such designs pop-up stab wont work Orbiteer Gerry Giles comes rescue pop-down stab reported Torbellino sketch shows basic tail-end hardware front end can fuse burner such Polly Gerry reports prototype works very well does appear vulnerable damage feared Addition 1/16-sq spruce leading edge will help drawback compared pop-up lack adjusting screw trim However find once adjust ments warped little need ever change Note Blanchards version pop-up DT employs shims rather adjust ing screw Bob Meuser 4200 Gregory St Oakland CA 94619 FF Indoor/Tenny continued page 48 done yet another fun model idea glven specified set materials can build glider 30 minutes set rules specified contestant would furnished 6-in long piece 1/16X1/8 balsa 2X6X1/32 balsa sheet No other materials except choice adhesive permitted includes nose weight must derived balsa glue idea provides interesting challenge should thought out well advance contest Styrofoam prop blocla Bob Lieber has sug gested expensive balsa blocks no longer need invested prop blocks photo shows styrofoam block used forming balsa blades Coupe dHiver models also can used Easy B Pennyplane props Two precautions necessary first blades must air dried since baking oven would melt deform styrofoam second work sur face should protected rubbing epoxy glue foam Bob uses expanded bead foam material offers following advice about cutting helix Thin plywood some other hard material glued uncut block both top bottom gnide hot wire cutter top guide visible photo cutter wire must parallel end planes block during whole cut cut surface needs no sanding care applying epoxy glue will preserve smooth surface Bud Tenny PO Box 545 Richardson TX 75080 Junior/Hartmangruber continued page 57 once week Boys Club starters use Comet Fly Boy Cloud Buster kits because two kits excellent teaching fundamentals built up wing fuselage construction finer points model adjustments best flights After boys have mastered two models encouraged make own selections building proj ects have several have gone advanced free flight control line engine-powered models needs done ignite spark interest help grow Now must say should club club member volunteer conduct model group anywhere make one-time thing Continuous instruction flying operations necessary keep up develop interest boy Boys Club always influx new members time goes find boy often will show real interest educational value art model building really rest life others time may seem just something Boys Club knows maybe later life will remember enjoyed modeling resume building flying Editors Note numerous flying sessions localities have impressed enthralled kidsof ageswho ask models can befoun4 tofly Letters magazine reflect same needfor information So Wyoufree-flighters will bear us month wed like render much-needed service author outstand ing rubber-model expert familiar market availabiliiy invited MA share us experience building flying hund reds interesting aircraft Although talking scale will find included meaningful coverage non-scale items trainer intermediate categoriesgreat lead-ins tackling real scale stuff SAFE FLYING IS NO ACCIDENT 126 Model Aviation
Edition: Model Aviation - 1979/12
Page Numbers: 48, 126
NEW season coming Only few areas have indoor flying year around us have wait cooler months before seriously planning indoor activity time ap proaching contests flying sessions will begin planning time now number different indoor activities add spice interest lets examine few Postal Contests model airplane contests conducted mailthat club indi vidual entered will fly events local site under conditions agreed upon participants results mailed originating group sponsor times compared winners notified mail nothing like having wait three weeks longer find out won contest kind flying often takes place during winter months few die-hards have access indoor sites year around no shows up flying sessions during summer try postal meets can still have some competition flys postal meets know some another area send invitation challenge depending good think see will take Otherwise may read postal meets club newsletters similar sources Finally clubs indi viduals wish try postal flying may write column declare intent someone has made similar offer can get together challenge invitation will pub lished next available column along address telephone number wish No telephone numbers will published specific permission Lets try outall can lose time takes write results various matches can published maybe will have some extra fun Some Postal Guidelines invitations should specific model class some range ceiling heights NIMAS National Indoor Model Airplane Society has conducted annual postal meet using fudge factors allow comparison between times flown under different ceiling heights interest postal flying via column will printed about fudge factors need arises about Start Cat Pennyplane con tests Almost everyone has Cat site available Pennyplanes Easy Bs popular models Since AMA Rule Book deliberately vague about some aspects Easy B rules sure specify what mean Easy B model Ceiling Dodgers times contest won model can maintain its cool scrubbing flat ceiling banging around rafters has noted such flying like picking best thermals outdoor FF events So disqualify model touches ceiling part building structure such way climb portion flight prolonged takes really good model well adjusted skillfully flown win under no touch rules prop/rubber combination whole new setup really good fliers find new dimension flying such contest Note indoor model can used Ceiling Dodgers fit model choice site holding event can specify certain model type design fit event needs group look another way ceiling dodging concept will also make otherwise poor site fairly acceptable reality indoor HLGs no touch modelseven just brush ceiling light flight nearly always spoiled Special Events about Matchbox Con test concept calls careful design construction plus clever ideas Any model will fit standard box common kitchen matches eligible Depending upon sets up rules model parts must fit box assembled model must fit box Under assembled category helicopters very low aspect-ratio rubber-powered models have done well catapult glider built matchbox event lot fun difficult adjust smallest piece indoor rubber available giider moves fast release vanishes sight has get someone else launch model possible observe trajec tory decide what adjustments need made Parlor Mites parlor contests parlor mite basically 10 span model intended flown homes very small sites may have number various rules depending holds event Micro-X PO Box 1063 Lorain OH 44055 has kit furnishes materials three such models differing design kit could basis formula contest guaranteed liven up model club party San Diego Orbiteers have similar class despite fairly stringent rules often has flights exceeding three minutes recreation center gymnasium rules A-6 class 1 Wing area 30 sq maximum 2 Motor stick length prop diameter 6 maximum 3 materials readily available hobby shops 4 wood strip 1/16 sq minimum sheet balsa parts made 1/32 minimum thickness 5 Wing rib depth 1/16 minimum wing covering tissue models rubber-powered 6 Prop can unmodified commercial plastic built flat sheet balsa blades mounted 1/8-in square hub 7 Prop shaft 1/32 diameter wire thrust bearing 1/16 diameter aluminum tubing Orbiteers intended A-6 model group activity club rather project rank beginner same time beginner groups experienced guidance can well A-6 design model building classes Thirty-Minute Glider No Stan Stoy hasnt Continued page 126 48 Model Aviation Left Not prop blocks expensivel styrofoam block has some drawbacks convenience outweighs Credit Bob Lieber idea photo Right Stan Chiltons ultimate indoor scale0 Haus Triple Beam Balance sensitive 00017 oz does change humidity like homemade scales Expensive very convenient Tell-all picture beautiful scale work taken Stan Winning Ideas FOURMOST FUEL FITTING SETS Large Fuel Fitting Set cSize % IDPRICE S150 1 Tee 1 Elbow 1 Union 1 Plug Both Made Fuel Proof Polyethylene Small Fuel Fitting Set Size A6 10PRICE S125 1 Tee 2 Elbows 1 Pen Bladder Tee FUEL MANIFOLD This Manifold Provides Convenient Method Tank Filling Draining Priming %2 10PRICE 95 1 Scale 1931 Gee Bee Super Sportster IGeneral Arrange ment Drawing Catalog 25cBy W T Bill Given ERNISTIC MODELS PO BOX 6974 ALBUQ NM 87197 lated mild chuck article claims control characteristics can simulated too cutting away control surface taping back deflected position author cites cases unusual characteristics cures predicted small chuck-glider tests later confirmed expensive wind-tunnel tests RC model programs course models must accurately constructed attention must paid accuracy incidence angles CG positions model must launched proper flight attitude speed wonder dont use technique design aid free-flight competition sport models has done course isnt done very often reason bunch copy cats Basic area ratios moment arms dihedral angles CG positions have pretty well standardized before trying something really newa T-tail negative dihe dral stab canard winglets whateverwouldnt pay spend hour two doing bit cutand-try chuck glider first Certainly FF Scale modelers should able profit technique except perhaps few blessed nack being able make fool thing fly Hello Bill Warner course technique shouldnt work Reynolds Number thatbut ap parently does recently built model absolutely unstable Perhaps bi-stable would accurate description perfectly stable either normal glide near-vertical dive model wasnt far out should have flown well didnt might have profited technique shouldnt work does OHLG DT forms dethermalizers have 0491051 AIR FLO ENGINE MOUNT REDUCES DRAG VIBRATION FREE PRICE 250 FUEL SHUTOFF Can Used Control Fuel Flow Starting jPositive Airborn Shutoff PRICE 350 C FLASH STARTING SUNEXCELLER POWER S LONGER LIFE SLOWEST DRAIN GLOW PLUGS SWANSON ASSOCIATES gte P0 309 SI WAYNE N W JERSEY 69 ROUTE 29PEOIJANROcE 9W IERS used outdoor hand-launch gliders cluding drag brakes fold-down rudder drop-off nose weight pop-up stab popularized Bill Blanchard See Polly article May issue Bills scheme employed him others decade works just great some fliers prefer mount stabilizer bottom fuselage such designs pop-up stab wont work Orbiteer Gerry Giles comes rescue pop-down stab reported Torbellino sketch shows basic tail-end hardware front end can fuse burner such Polly Gerry reports prototype works very well does appear vulnerable damage feared Addition 1/16-sq spruce leading edge will help drawback compared pop-up lack adjusting screw trim However find once adjust ments warped little need ever change Note Blanchards version pop-up DT employs shims rather adjust ing screw Bob Meuser 4200 Gregory St Oakland CA 94619 FF Indoor/Tenny continued page 48 done yet another fun model idea glven specified set materials can build glider 30 minutes set rules specified contestant would furnished 6-in long piece 1/16X1/8 balsa 2X6X1/32 balsa sheet No other materials except choice adhesive permitted includes nose weight must derived balsa glue idea provides interesting challenge should thought out well advance contest Styrofoam prop blocla Bob Lieber has sug gested expensive balsa blocks no longer need invested prop blocks photo shows styrofoam block used forming balsa blades Coupe dHiver models also can used Easy B Pennyplane props Two precautions necessary first blades must air dried since baking oven would melt deform styrofoam second work sur face should protected rubbing epoxy glue foam Bob uses expanded bead foam material offers following advice about cutting helix Thin plywood some other hard material glued uncut block both top bottom gnide hot wire cutter top guide visible photo cutter wire must parallel end planes block during whole cut cut surface needs no sanding care applying epoxy glue will preserve smooth surface Bud Tenny PO Box 545 Richardson TX 75080 Junior/Hartmangruber continued page 57 once week Boys Club starters use Comet Fly Boy Cloud Buster kits because two kits excellent teaching fundamentals built up wing fuselage construction finer points model adjustments best flights After boys have mastered two models encouraged make own selections building proj ects have several have gone advanced free flight control line engine-powered models needs done ignite spark interest help grow Now must say should club club member volunteer conduct model group anywhere make one-time thing Continuous instruction flying operations necessary keep up develop interest boy Boys Club always influx new members time goes find boy often will show real interest educational value art model building really rest life others time may seem just something Boys Club knows maybe later life will remember enjoyed modeling resume building flying Editors Note numerous flying sessions localities have impressed enthralled kidsof ageswho ask models can befoun4 tofly Letters magazine reflect same needfor information So Wyoufree-flighters will bear us month wed like render much-needed service author outstand ing rubber-model expert familiar market availabiliiy invited MA share us experience building flying hund reds interesting aircraft Although talking scale will find included meaningful coverage non-scale items trainer intermediate categoriesgreat lead-ins tackling real scale stuff SAFE FLYING IS NO ACCIDENT 126 Model Aviation