FREE FLIGHT INDOOR lTr f yflcjm lT ir OME MESSAGE As building column following E-mail arrived Jimmy Buxton trying get hold let know am still piece fully recovered little incident kept getting Johnson City year wanted let know feel fine thank along rest Indoor community card created well wishes received really great see names associate familiar faces card wishing full speedy recovery promise will Johnson City next year thank everyone can person am also back throwing gliders again trying get shape chase elusive 80-second barrier MiniDome also really want help Bernie [Boehm] trying prevent United States Indoor HLG [Hand-Launched Glider] title making its way Australia again Thanks Indoor Group Indoor Radio Control RC Fun-Flying fast-growing segment Indoor activity represented Northern Slo-Fli designed Gerry Pronovost Ottawa Indoor Model Flyers Description total weight 46 oz 135 grams Northern Slo-Fli travels approximately 2 meters per second fast walking pace weight breakdown model Fuselage Wing Stab RC equipment Battery Nacelle gear Prop Motor gearing 10 g 27 g 31 g 25 g 15 g 2g 25 g equipment used Cannon Ultra Micro Three four channels used control modeltwo servos control rudder elevator German speed controller BEC [Battery Eliminator Circuit] 18 g used throttle Seven 50 mA cells energize 10-gram coreless motor tI2 x -inch Gear reduction 881 spins 95-inch hand-carved balsa prop speeds up 2500 rpm 50 mA battery pack can fastcharged 12-volt battery pack plane will take off less 10 feet dependent upon throttle setting can climb quickly cruise around desired height floor level ceiling model extremely stable has remarkably small turning circle no stall tendencies Flight durations determined throttle setting battery capacity Flights four minutes currently being made nothing rewarding see controlled craft cruise walking pacethis what call Joie de vivre designed aircraft simple light easy control school gymnasium after 25 flights very few adjustments have required have no mishaps Photo furnished Dan OGrady editor SAM 86 Speaks shows structure very well Microfilm Flu Last fall discussed perceived shortage microfilm solution concerns about whether FlD wingspan should reduced 55 centimeters us fortunate enough receive El Torbellino newsletter San Diego Orbiteers edited Howard Haupt got delightful unexpected bonus Cezar Banks wrote excellent treatise Aesthetics Microfilm includes following 130 Model Aviation Fli Canadian Indoor Radio Control sport model designed Gerry Pronovost Ottowa Indoor Model Flyers Photo provided Dan OGrady Nick Leonard made interesting winding stooge scrap materials shop Details text Leonard photo background position theres much newsletter Im love microfilm am awe us just modelers either Have ever run across anyone toddler very senior citizen seeing mike ship fly very first time has looked wonder lands very young kids want get hands Others press have cautioned get too close Its though magnetic pull work something magical happening Are emotions being stirred bet Beats Wonder like beauty cannot explained 80s gave five dinner talks around country local chapters AIAA American Institute Aeronautics Astronautics capping off FlD flight demo few feet over heads dining room audience mostly engineers few spouses individual reactions always same eyes got wider jaw would drop mouth opened whole face lit up kids again moment moment mesmerized Indeed words like mesmerized gossamer ethereal majestic etc have used describe subjective qualities microfilm models since first appeared scene 1930s 60-odd years since mystique has endured grown objective qualities cant explained can compared Imagine minds eye current 65 cm Microfilm model cruising alongside proposed 55 cm Plastic ship sake argument lets say both mesmerizing gossamer ethereal majestic little lot Just big aesthetic margin between Which leads think rationale smaller model plastic covering compelling enough willing give up aesthetic margin say no about Fudge Factors Years ago Charlie Sotich suggested concept fudge factor could used make allowances ceiling height different sites postal contests held basic formula first used members NIMAS National Indoor Model Airplane Society worked pretty well long wasnt big difference ceiling heights MiniStick International Postal meets have used formula allows wide range heights Robert Leifeld posted query Indoor Group Hello am old prof still does bit Indoor flying report Model Aviation postal contest gives rise note has always bothered fudge factor ceiling height factored scoring no fudge factor air density consequence course us dont live near sea level cant compete dont enter about getting some pros indoor flying business paper variation flying times air density effect likely non-linear Numerous replies agreed posting Hermann Andresen referred paper published NFFS National Free Flight Society Symposium passed comment correctly stated elevation correction nonlinear simplicity close approximation would consider atmosphere ocean air 30000 ft deep sea level full pressure 6000 ft above /5 20 percent atmosphere order plane generate same lift equal its weight will have fly about 10 percent faster same lift drag angle would have 10 percent less performance lift drag angle given airfoil would slightly steeper higher elevation example Reynolds No would 10% lower based density x velocity Indoor outdoor models flying laminar regime translates 5% increase skin friction profile drag Since other sources drag especially induced lift/drag ratio two 3 percent worse short lose about 2% performance 1000 feet elevation Similarly lose about percent ten degrees F increase temperature rubber powered models totally overwhelmed rubber motors increase energy release temperature dont have information Fred Pearce others have test data Yes would fairer correct Indoor postal times both elevation temperature Winding Stooge An accompanying photo shows winding stooge used Nick Nicklet Leonard Nick puzzled about thought such good idea First stooge Ive seen used Indoor flier can stand upright wind relaxed comfortable stance Second knocks down small bundle aluminum pieces stows almost anywhere travel stooge integrates Wilder winder homemade torque meter swivels align rubber mandatory rubber torque element aligned best accuracy Everything needed make flight except model rubber motor convenient package Actually stooge packedit requires reasonably heavy object ballast help keep upright usually object opportunity picture connecting rod aircraft engine Nick claims stooge built scrap materials around shop except two machined fittings joining pieces four rigging clips anchoring four wire cables hold whole mechanism rigid * January1999 131 Structural detail Leonard winding stooge Leonard photo
Edition: Model Aviation - 1999/01
Page Numbers: 130, 131
FREE FLIGHT INDOOR lTr f yflcjm lT ir OME MESSAGE As building column following E-mail arrived Jimmy Buxton trying get hold let know am still piece fully recovered little incident kept getting Johnson City year wanted let know feel fine thank along rest Indoor community card created well wishes received really great see names associate familiar faces card wishing full speedy recovery promise will Johnson City next year thank everyone can person am also back throwing gliders again trying get shape chase elusive 80-second barrier MiniDome also really want help Bernie [Boehm] trying prevent United States Indoor HLG [Hand-Launched Glider] title making its way Australia again Thanks Indoor Group Indoor Radio Control RC Fun-Flying fast-growing segment Indoor activity represented Northern Slo-Fli designed Gerry Pronovost Ottawa Indoor Model Flyers Description total weight 46 oz 135 grams Northern Slo-Fli travels approximately 2 meters per second fast walking pace weight breakdown model Fuselage Wing Stab RC equipment Battery Nacelle gear Prop Motor gearing 10 g 27 g 31 g 25 g 15 g 2g 25 g equipment used Cannon Ultra Micro Three four channels used control modeltwo servos control rudder elevator German speed controller BEC [Battery Eliminator Circuit] 18 g used throttle Seven 50 mA cells energize 10-gram coreless motor tI2 x -inch Gear reduction 881 spins 95-inch hand-carved balsa prop speeds up 2500 rpm 50 mA battery pack can fastcharged 12-volt battery pack plane will take off less 10 feet dependent upon throttle setting can climb quickly cruise around desired height floor level ceiling model extremely stable has remarkably small turning circle no stall tendencies Flight durations determined throttle setting battery capacity Flights four minutes currently being made nothing rewarding see controlled craft cruise walking pacethis what call Joie de vivre designed aircraft simple light easy control school gymnasium after 25 flights very few adjustments have required have no mishaps Photo furnished Dan OGrady editor SAM 86 Speaks shows structure very well Microfilm Flu Last fall discussed perceived shortage microfilm solution concerns about whether FlD wingspan should reduced 55 centimeters us fortunate enough receive El Torbellino newsletter San Diego Orbiteers edited Howard Haupt got delightful unexpected bonus Cezar Banks wrote excellent treatise Aesthetics Microfilm includes following 130 Model Aviation Fli Canadian Indoor Radio Control sport model designed Gerry Pronovost Ottowa Indoor Model Flyers Photo provided Dan OGrady Nick Leonard made interesting winding stooge scrap materials shop Details text Leonard photo background position theres much newsletter Im love microfilm am awe us just modelers either Have ever run across anyone toddler very senior citizen seeing mike ship fly very first time has looked wonder lands very young kids want get hands Others press have cautioned get too close Its though magnetic pull work something magical happening Are emotions being stirred bet Beats Wonder like beauty cannot explained 80s gave five dinner talks around country local chapters AIAA American Institute Aeronautics Astronautics capping off FlD flight demo few feet over heads dining room audience mostly engineers few spouses individual reactions always same eyes got wider jaw would drop mouth opened whole face lit up kids again moment moment mesmerized Indeed words like mesmerized gossamer ethereal majestic etc have used describe subjective qualities microfilm models since first appeared scene 1930s 60-odd years since mystique has endured grown objective qualities cant explained can compared Imagine minds eye current 65 cm Microfilm model cruising alongside proposed 55 cm Plastic ship sake argument lets say both mesmerizing gossamer ethereal majestic little lot Just big aesthetic margin between Which leads think rationale smaller model plastic covering compelling enough willing give up aesthetic margin say no about Fudge Factors Years ago Charlie Sotich suggested concept fudge factor could used make allowances ceiling height different sites postal contests held basic formula first used members NIMAS National Indoor Model Airplane Society worked pretty well long wasnt big difference ceiling heights MiniStick International Postal meets have used formula allows wide range heights Robert Leifeld posted query Indoor Group Hello am old prof still does bit Indoor flying report Model Aviation postal contest gives rise note has always bothered fudge factor ceiling height factored scoring no fudge factor air density consequence course us dont live near sea level cant compete dont enter about getting some pros indoor flying business paper variation flying times air density effect likely non-linear Numerous replies agreed posting Hermann Andresen referred paper published NFFS National Free Flight Society Symposium passed comment correctly stated elevation correction nonlinear simplicity close approximation would consider atmosphere ocean air 30000 ft deep sea level full pressure 6000 ft above /5 20 percent atmosphere order plane generate same lift equal its weight will have fly about 10 percent faster same lift drag angle would have 10 percent less performance lift drag angle given airfoil would slightly steeper higher elevation example Reynolds No would 10% lower based density x velocity Indoor outdoor models flying laminar regime translates 5% increase skin friction profile drag Since other sources drag especially induced lift/drag ratio two 3 percent worse short lose about 2% performance 1000 feet elevation Similarly lose about percent ten degrees F increase temperature rubber powered models totally overwhelmed rubber motors increase energy release temperature dont have information Fred Pearce others have test data Yes would fairer correct Indoor postal times both elevation temperature Winding Stooge An accompanying photo shows winding stooge used Nick Nicklet Leonard Nick puzzled about thought such good idea First stooge Ive seen used Indoor flier can stand upright wind relaxed comfortable stance Second knocks down small bundle aluminum pieces stows almost anywhere travel stooge integrates Wilder winder homemade torque meter swivels align rubber mandatory rubber torque element aligned best accuracy Everything needed make flight except model rubber motor convenient package Actually stooge packedit requires reasonably heavy object ballast help keep upright usually object opportunity picture connecting rod aircraft engine Nick claims stooge built scrap materials around shop except two machined fittings joining pieces four rigging clips anchoring four wire cables hold whole mechanism rigid * January1999 131 Structural detail Leonard winding stooge Leonard photo