FREE FLIGHT INDOOR jT E i ii ABOUT EIGHT MONTHS AGO chit-chat between Del Ogren Roger Schroeder developed concept Internet-based postal contest A-6 class A-6 class proposed Clarence Mather San Diego Orbiteers club published rules began promoting event first such contest history excellent results including imposing international entry Hats off Del Roger data below taken Internet Complete results available http/n-lemmacom/indoor/ ContestantTime Andrew Tagliafico 640 John Lenderman636 Akihiro Danjo626 Mark Allison623 Lew Gitlow603 Emil Schutzel505 Adj Time see 415 441 400 398 378 334 Hi 47 47 483 47 47 265 Bill Shailor504333266 six highest adjusted times Note time Andrew Tagliafico 640 fudge factor 2/3 sec per foot ceiling height difference 70 feet following have abstracted Roger Schroeders comments also posted Internet http/n lemma com/indoor has pleasure Contest Director first A-6 International E-mail contest made possible generosity Del Ogren maintained web site regularly posted new results international event entries England Australia Finland Argentina Japan US winners participating believe between eight 10 fliers never built Indoor model before lot never built A-6 model participation beginners especially good due mostly efforts Don Park teacher Piper Middle School Kansas City Kansas believe A-6 now established low-cost lowtech fun-type competitive Indoor event can find airplanes cost less admission show still fly indoors times four seven minutes Del hope some large club will adopt A-6 event encourage competition maintain consistent set rules have kindly offered suggestions about rule changes Most concerned tissue covering rule Gampi paper lightest tissue A-6 available two sources US relatively expensive Other comments concerned /32 diameter wire size Akihiro pointed out outside US wood metric sizes 1 15 23 etc 1/16 square 1/32 sheet available sanding size blade mounted weight applies twist prop blade test Torque stand used Leonard father-son team modular torsional strength see text Jim Clem photos disassembles easy packing allows stand-up winding September 1998 127 Simple addition prop pitch gauge allows torsional testing prop bladeslspars works plug-in blades address concerns propose following rule changes made 1 Add rule minimum model weight rubber 13 grams 2 Allow covering material plastic paper microfilm etc 3 Eliminate wire-size rule 4 builders metric wood sizes available 15 mm wood may substituted /16 wood 1 mm may substituted 1/32 important rule minimum weight After worry about covering materials wire sizes small variations wood sizes goes away Boeing Model Activity Thanks lot hard work several people Boeing employees three locations have regular access Indoor sites Keith Varnau gave brief report After almost six years BEAMS Boeing Employees Aerodynamic Modeling Society up running three locations Everett WA Seattle WA Wichita KS Leadership has changed focus remains basically same sharing technical skills adults youth together Indoor E-mail Indoor Group has 145 members registered Bud Tenny rten@nstarnet sending E-mail request address receive late-breaking news such happens clubs holding Indoor events can send announcements events Bud Tenny via E-mail snail mail Box 830545 Richardson TX 75083 prompt posting members Indoor Group Dels web page Come join us Indoor Electric Bob Wilder has made another one-hour-plus flight 1:1908 same Cat II site made previously reported 63-minute flight time sanction effect eight ten witnesses After flight passed 50 minutes some talk about potty breaks sending out food model still enough energy climb slowly after time passed 60 minutes last five minutes possible because site long enough prolonged level flight very low power levels model sinks turning drifts slowly higher straight flight much-higher site descent could have longer high altitude site about 34 feet high Wing 40 inches span 250 sq inches area Weight 110 grams Battery 4 x 550 mAh NiMH weighing 48 grams Motor Wes-Technik DC-S Wes-Technik 8 x 4 carbon-fiber prop Gearbox homemade 751 ratio Control nonproportional rudder on-off motor control modified Twin Turbo two-channel radio Covering 1/2 mil MylarTM Since record flight Bob has redone model different radio batteries 15 percent reduction weight Bob Clemens staged Indoor contest Buffalo Bills fieldhouse Buffalo New York event may help establish pattern access may help us find Indoor sites other parts country Besides regular Indoor events meet featured Indoor Electric FF event Bobs report Electric event three contestants ad hoc Unlimited Electric Endurance event no rules other models Free Flight electrically powered bit surprised low turnout flying very good 1 Dan Hurd Thistle 2 Mark Whalen Mastodon 3 Clarence Hurd Thistle 1100 906 547 Thistle small all-sheet podand-boom design uses small Kenway motors pusher setup pod construction article about two years ago Model Aviation Don Srull brought along very light Indoor RC model flew hour 31 minutes finally landing out sheer boredom 50 contestants meant able break financially meet Buffalo Bills fieldhouse cost us $1000 day well worth believe word-of-mouth well get contest will ensure better turnout 1999 Speculation BEAM newsletter Gene Stubbs Editor recent return astronaut Shannon Lucid Mir Space Station got thinking What would marooned Space Station six months would what always similar situations would open up smuggled package balsa start building MiniSticks would typical Indoor aircraft fly weightlessness Sure flight times would great what about stability no gravity would no sideslipthe dihedral would ineffective aircraft would probably just spiral around corkscrew pattern Rather striving maximum flight time Indoor contest orbit might have goal achieve stable circular flight path After some thought decided regular MiniStick weightlessness should fly stable loops Lets say have MiniStick weighs 1/2 g trimmed cruise Earth airspeed 2 meters per second weightlessness would execute loop 4 meter radius centrifugal force would equal aircrafts /2 g weight Earth equal its lift could add ballast bring gross weight mass up say 12 g would make stable loop radius more-reasonable 1 meter Since aircraft cant tell difference between gravity centrifugal force stability mechanisms help fly Earth should still active weightlessness roll disturbance instance would lead sideslip whereupon dihedral would kick right aircraft Any increase loop radius would like reducing gravity Earth aircraft would climb back stable loop radius lift centrifugal forces cancel Equal Blade Flare Jim Clems continuing experiments prop efficiency prop flaring led test rig shown Photos 1 2 Most us use some sort pitch measurement rig ensure props what think assurance important amount flare Unequal flare like unequal pitch distribution between blades causes prop wobble diminishes flight time Jim uses plug-in blades easy clamp blade place twist hub end prop weighted beam Equal twist can twiddled bladesjust before assembling blades hub Photo 1 before adding weight beam Photo 2 shows displacement arbitrary twisting moment Field Support Equipment Nick Nicklet Leonard father-son team now concentrating FiD models have constructed some awesome support equipment photo shows torque stand best Ive seen uses helium bottle ballast disassembles small pile pieces easy transport best thing about rig puts torque meter convenient heightno bending over winding Model Aviation
Edition: Model Aviation - 1998/09
Page Numbers: 127, 128
Edition: Model Aviation - 1998/09
Page Numbers: 127, 128
FREE FLIGHT INDOOR jT E i ii ABOUT EIGHT MONTHS AGO chit-chat between Del Ogren Roger Schroeder developed concept Internet-based postal contest A-6 class A-6 class proposed Clarence Mather San Diego Orbiteers club published rules began promoting event first such contest history excellent results including imposing international entry Hats off Del Roger data below taken Internet Complete results available http/n-lemmacom/indoor/ ContestantTime Andrew Tagliafico 640 John Lenderman636 Akihiro Danjo626 Mark Allison623 Lew Gitlow603 Emil Schutzel505 Adj Time see 415 441 400 398 378 334 Hi 47 47 483 47 47 265 Bill Shailor504333266 six highest adjusted times Note time Andrew Tagliafico 640 fudge factor 2/3 sec per foot ceiling height difference 70 feet following have abstracted Roger Schroeders comments also posted Internet http/n lemma com/indoor has pleasure Contest Director first A-6 International E-mail contest made possible generosity Del Ogren maintained web site regularly posted new results international event entries England Australia Finland Argentina Japan US winners participating believe between eight 10 fliers never built Indoor model before lot never built A-6 model participation beginners especially good due mostly efforts Don Park teacher Piper Middle School Kansas City Kansas believe A-6 now established low-cost lowtech fun-type competitive Indoor event can find airplanes cost less admission show still fly indoors times four seven minutes Del hope some large club will adopt A-6 event encourage competition maintain consistent set rules have kindly offered suggestions about rule changes Most concerned tissue covering rule Gampi paper lightest tissue A-6 available two sources US relatively expensive Other comments concerned /32 diameter wire size Akihiro pointed out outside US wood metric sizes 1 15 23 etc 1/16 square 1/32 sheet available sanding size blade mounted weight applies twist prop blade test Torque stand used Leonard father-son team modular torsional strength see text Jim Clem photos disassembles easy packing allows stand-up winding September 1998 127 Simple addition prop pitch gauge allows torsional testing prop bladeslspars works plug-in blades address concerns propose following rule changes made 1 Add rule minimum model weight rubber 13 grams 2 Allow covering material plastic paper microfilm etc 3 Eliminate wire-size rule 4 builders metric wood sizes available 15 mm wood may substituted /16 wood 1 mm may substituted 1/32 important rule minimum weight After worry about covering materials wire sizes small variations wood sizes goes away Boeing Model Activity Thanks lot hard work several people Boeing employees three locations have regular access Indoor sites Keith Varnau gave brief report After almost six years BEAMS Boeing Employees Aerodynamic Modeling Society up running three locations Everett WA Seattle WA Wichita KS Leadership has changed focus remains basically same sharing technical skills adults youth together Indoor E-mail Indoor Group has 145 members registered Bud Tenny rten@nstarnet sending E-mail request address receive late-breaking news such happens clubs holding Indoor events can send announcements events Bud Tenny via E-mail snail mail Box 830545 Richardson TX 75083 prompt posting members Indoor Group Dels web page Come join us Indoor Electric Bob Wilder has made another one-hour-plus flight 1:1908 same Cat II site made previously reported 63-minute flight time sanction effect eight ten witnesses After flight passed 50 minutes some talk about potty breaks sending out food model still enough energy climb slowly after time passed 60 minutes last five minutes possible because site long enough prolonged level flight very low power levels model sinks turning drifts slowly higher straight flight much-higher site descent could have longer high altitude site about 34 feet high Wing 40 inches span 250 sq inches area Weight 110 grams Battery 4 x 550 mAh NiMH weighing 48 grams Motor Wes-Technik DC-S Wes-Technik 8 x 4 carbon-fiber prop Gearbox homemade 751 ratio Control nonproportional rudder on-off motor control modified Twin Turbo two-channel radio Covering 1/2 mil MylarTM Since record flight Bob has redone model different radio batteries 15 percent reduction weight Bob Clemens staged Indoor contest Buffalo Bills fieldhouse Buffalo New York event may help establish pattern access may help us find Indoor sites other parts country Besides regular Indoor events meet featured Indoor Electric FF event Bobs report Electric event three contestants ad hoc Unlimited Electric Endurance event no rules other models Free Flight electrically powered bit surprised low turnout flying very good 1 Dan Hurd Thistle 2 Mark Whalen Mastodon 3 Clarence Hurd Thistle 1100 906 547 Thistle small all-sheet podand-boom design uses small Kenway motors pusher setup pod construction article about two years ago Model Aviation Don Srull brought along very light Indoor RC model flew hour 31 minutes finally landing out sheer boredom 50 contestants meant able break financially meet Buffalo Bills fieldhouse cost us $1000 day well worth believe word-of-mouth well get contest will ensure better turnout 1999 Speculation BEAM newsletter Gene Stubbs Editor recent return astronaut Shannon Lucid Mir Space Station got thinking What would marooned Space Station six months would what always similar situations would open up smuggled package balsa start building MiniSticks would typical Indoor aircraft fly weightlessness Sure flight times would great what about stability no gravity would no sideslipthe dihedral would ineffective aircraft would probably just spiral around corkscrew pattern Rather striving maximum flight time Indoor contest orbit might have goal achieve stable circular flight path After some thought decided regular MiniStick weightlessness should fly stable loops Lets say have MiniStick weighs 1/2 g trimmed cruise Earth airspeed 2 meters per second weightlessness would execute loop 4 meter radius centrifugal force would equal aircrafts /2 g weight Earth equal its lift could add ballast bring gross weight mass up say 12 g would make stable loop radius more-reasonable 1 meter Since aircraft cant tell difference between gravity centrifugal force stability mechanisms help fly Earth should still active weightlessness roll disturbance instance would lead sideslip whereupon dihedral would kick right aircraft Any increase loop radius would like reducing gravity Earth aircraft would climb back stable loop radius lift centrifugal forces cancel Equal Blade Flare Jim Clems continuing experiments prop efficiency prop flaring led test rig shown Photos 1 2 Most us use some sort pitch measurement rig ensure props what think assurance important amount flare Unequal flare like unequal pitch distribution between blades causes prop wobble diminishes flight time Jim uses plug-in blades easy clamp blade place twist hub end prop weighted beam Equal twist can twiddled bladesjust before assembling blades hub Photo 1 before adding weight beam Photo 2 shows displacement arbitrary twisting moment Field Support Equipment Nick Nicklet Leonard father-son team now concentrating FiD models have constructed some awesome support equipment photo shows torque stand best Ive seen uses helium bottle ballast disassembles small pile pieces easy transport best thing about rig puts torque meter convenient heightno bending over winding Model Aviation
