Indoor Now Time Get out indoor models check over warps needed repairs indoor season full swing number clubs having regu lar practice sessions contests set up After models ready make up new motors test fly models have access site Set up some sessions ownget swing sea son Visitors Welcome various cities listed below list indooi ses sion/contest dates contact information ConnecticutGlastonbury Jan 6 Jan 16 Feb 9 Feb 13 Mar 13 Apr 12 Apr 17 May 1 1977 Contact George Armstead 89 Harvest Lane Glaston bury CT 06033 FloridaMiami Jan 2 Feb 6 Mar 6 Apr 3 May 8 1977 Contact Dr John Martin 3227 Darwin St Miami FL 33133 IllinoisChicago monthly sessions Chicago area contact Otto Curth 2107 Center Northbrook IL 60062 New YorkNew York City Record trial sessions no gliders held Colum bia University contact Ron Williams 1364 Lexington Ave New York NY 10028 OklahomaMidwest City Jan 16 Feb 20 Mar 20 1977 Contact Matt Gewain 2215 Air Depot Blvd Midwest City OK 73110 Bud Tenny understanding torque output rubber motor can very helpful under standing indoor models fly better t IA 0 0 ITorque Makes World Go Round props too indoor fliers using torque meters rubber testing winding motors flight simplethe energy output indoor models rubber motor translated directly torque twist ing force drive propeller good precisely right motor model ceiling height conditions Torque Cone Fig shows typi cal torque curve rubber motor torque recorded during both winding unwinding higher curve shows torque buildup during winding lower curve unwinding curve important remember two things about winding curve steep peak near maximum turns much lower unwinding curve torque values same number turns steep part curve signals rubber close breaking flier lot winding experience using torque meter can sense rising torque stop wind ing before motor breaks impor tant remember drop torque upper curve lower torque level high enough launch Important Torque Levels particu lar prop/motor combination value torque launch determines high model will climb very important low medium ceiling flying makes very accurate way avoid hitting ceiling Besides launch torque also important know value level continued page 78 F G TURN S b FIG 2 CLIMB-HEAVY MOTOR LEVEL FLIGHT CLIMB-LIGHT MOTOR 46 Model Aviation Petite Amy Hancy gets off good flight Jr Easy B 1976 Nats came 6th another girl Cathy Mullins first Picture taken Phil Edwards AEMEN PRESENT 2~Eotea Hand GlideDurable Solid Sproce -7 & Baka Construceioo 17 WingSpan $249 Hand GliderExtra cab Solid Sproce & Balsa - Construction 18 WingSpan $249 Hand Glider Solid Syroce & Balsa Construction 11 Win5 Sparc -Ideal Beginner Competition Model $198 FF Indoor/Tenny continued page 46 flight torque changeover torque Levelflight torque torque required fly model level changeover torque minimum torque will make propeller continue pull model model still airborne motor unwinds changeover torque model immediately starts come down faster What happens prop continues turn model now pushing prop instead being pulled prop What Does Mean Fig 2 shows unwinding curves thick heavy motor upper curve thinner motor Launch torque level flight torque marked two horizontal lines show effect two very differ ent motors flight model two flights same model motor will released same launch torque level flight torque sumed same both flights heavy motor note much longer takes turns flight time motor unwind level flight torque means model will climb much longer thicker motor look what happens total unwinding time heavy motor over half gone model will probably run out turns before touchdown other curve climb time shorter time left unwinding level-flight torque occurs start linear part curve choice motor will result longer flight since model will come down slowly during time between level-flight torque changeover torque Hand GliderDo able Balsa Constroct 19 WegSpan $249 0 nd GliderDurable Balsa Construction -18 WingSpan $249 Kite teebde ipd ,5eblank&pm5pa isde ,dd & ensue, Aero Modeling Enterprises 2215 So Air Depot Bind MidwestCity OkIa 73110 Dealer Inquiries Invited See hobby dealer firull Winding Technique Important un winding curves shown Fig 1 Fig 2 typical what happens flying field winding curve Fig 1 idealized shape hap pens real life Actually Fig 1 wind ing curve traced machine-wound test unstretched wound nearly break point An experienced flier winds some variations scheme motor stretched out between four six times normal length turns added fairly slowly torque meter reading watched carefullynot ab solute values trend torque begins rise rapidly addition few turns 5he amount stretch reduced reduced tension allows some motor knots double up indicated torque drops some point fliers allow motor rest little massage knots work out local lumps wound motor Winding continues followed further reduction stretch massage motor fully wound torque level should high steady Launch Torque Now motor fully wound torque probably higher desired launch torque Since usually necessary let out few turns allow motor slip off winder hook motor prop re-check torque torque meter has un winding feature easy let off enough turns reach desired launch torque Otherwise necessary hook motor model let prop run until torque feels right Wind Less such problem getting fully wound desired launch torque wind motor enough get right torque Im glad asked Winding motor way has certain benefits First winding technique mentioned above motor consistently wound time likely react previous flights Second winding way unwinding desired torque motor will have up 15% turns simply wound launch torque launched fliers have prob lems making consistent flights proper winding technique can overcome problems since torque rather number turns given motor determines high model climbs safer use torque stead turns Bud Tenny Box 545 Richardson TX 75080 RC Sport/Van Putte continued page 17 ron differential required ar range linkages obtain Unfortu nately best method trial-and-error have patience can get just right wrong aileron differen tial better Figs 1 2 show two ways obtain aileron differential low-wing airplanes Since virtually pattern airplanes have low wings sport fliers highwing airplanes arent really concerned perfect axial rolls shouldnt cause problems course can combine both techniques provide differential possible using either technique itself Try very easy works reminds construction tech nique just discovered would like share Like modelers often use vinyl spackling basic construction repair jobs Spackling great use cause fills small holes well easy sand easy sand because soft relatively porous both char acteristics can problems paint over because paint absorbed spackling finish duller adjacent areas After sanding down spackled area give shot Hot Stuff Zap other light sanding paint goes much uniformly TA C Times newsletter Temple Texas Aero Modelers Model Airplane Club edited Dan Amburn comes gem worth sharing Happiness Finding out new next door neigh bor Jersey Jim Martin landing ten sec onds before receiver battery dies finding out loud crunch heard backing car out pit area rotten board accidentally flying through tree touching limb cleaning plane suddenly 78 Model Aviation
Edition: Model Aviation - 1977/02
Page Numbers: 46, 78
Indoor Now Time Get out indoor models check over warps needed repairs indoor season full swing number clubs having regu lar practice sessions contests set up After models ready make up new motors test fly models have access site Set up some sessions ownget swing sea son Visitors Welcome various cities listed below list indooi ses sion/contest dates contact information ConnecticutGlastonbury Jan 6 Jan 16 Feb 9 Feb 13 Mar 13 Apr 12 Apr 17 May 1 1977 Contact George Armstead 89 Harvest Lane Glaston bury CT 06033 FloridaMiami Jan 2 Feb 6 Mar 6 Apr 3 May 8 1977 Contact Dr John Martin 3227 Darwin St Miami FL 33133 IllinoisChicago monthly sessions Chicago area contact Otto Curth 2107 Center Northbrook IL 60062 New YorkNew York City Record trial sessions no gliders held Colum bia University contact Ron Williams 1364 Lexington Ave New York NY 10028 OklahomaMidwest City Jan 16 Feb 20 Mar 20 1977 Contact Matt Gewain 2215 Air Depot Blvd Midwest City OK 73110 Bud Tenny understanding torque output rubber motor can very helpful under standing indoor models fly better t IA 0 0 ITorque Makes World Go Round props too indoor fliers using torque meters rubber testing winding motors flight simplethe energy output indoor models rubber motor translated directly torque twist ing force drive propeller good precisely right motor model ceiling height conditions Torque Cone Fig shows typi cal torque curve rubber motor torque recorded during both winding unwinding higher curve shows torque buildup during winding lower curve unwinding curve important remember two things about winding curve steep peak near maximum turns much lower unwinding curve torque values same number turns steep part curve signals rubber close breaking flier lot winding experience using torque meter can sense rising torque stop wind ing before motor breaks impor tant remember drop torque upper curve lower torque level high enough launch Important Torque Levels particu lar prop/motor combination value torque launch determines high model will climb very important low medium ceiling flying makes very accurate way avoid hitting ceiling Besides launch torque also important know value level continued page 78 F G TURN S b FIG 2 CLIMB-HEAVY MOTOR LEVEL FLIGHT CLIMB-LIGHT MOTOR 46 Model Aviation Petite Amy Hancy gets off good flight Jr Easy B 1976 Nats came 6th another girl Cathy Mullins first Picture taken Phil Edwards AEMEN PRESENT 2~Eotea Hand GlideDurable Solid Sproce -7 & Baka Construceioo 17 WingSpan $249 Hand GliderExtra cab Solid Sproce & Balsa - Construction 18 WingSpan $249 Hand Glider Solid Syroce & Balsa Construction 11 Win5 Sparc -Ideal Beginner Competition Model $198 FF Indoor/Tenny continued page 46 flight torque changeover torque Levelflight torque torque required fly model level changeover torque minimum torque will make propeller continue pull model model still airborne motor unwinds changeover torque model immediately starts come down faster What happens prop continues turn model now pushing prop instead being pulled prop What Does Mean Fig 2 shows unwinding curves thick heavy motor upper curve thinner motor Launch torque level flight torque marked two horizontal lines show effect two very differ ent motors flight model two flights same model motor will released same launch torque level flight torque sumed same both flights heavy motor note much longer takes turns flight time motor unwind level flight torque means model will climb much longer thicker motor look what happens total unwinding time heavy motor over half gone model will probably run out turns before touchdown other curve climb time shorter time left unwinding level-flight torque occurs start linear part curve choice motor will result longer flight since model will come down slowly during time between level-flight torque changeover torque Hand GliderDo able Balsa Constroct 19 WegSpan $249 0 nd GliderDurable Balsa Construction -18 WingSpan $249 Kite teebde ipd ,5eblank&pm5pa isde ,dd & ensue, Aero Modeling Enterprises 2215 So Air Depot Bind MidwestCity OkIa 73110 Dealer Inquiries Invited See hobby dealer firull Winding Technique Important un winding curves shown Fig 1 Fig 2 typical what happens flying field winding curve Fig 1 idealized shape hap pens real life Actually Fig 1 wind ing curve traced machine-wound test unstretched wound nearly break point An experienced flier winds some variations scheme motor stretched out between four six times normal length turns added fairly slowly torque meter reading watched carefullynot ab solute values trend torque begins rise rapidly addition few turns 5he amount stretch reduced reduced tension allows some motor knots double up indicated torque drops some point fliers allow motor rest little massage knots work out local lumps wound motor Winding continues followed further reduction stretch massage motor fully wound torque level should high steady Launch Torque Now motor fully wound torque probably higher desired launch torque Since usually necessary let out few turns allow motor slip off winder hook motor prop re-check torque torque meter has un winding feature easy let off enough turns reach desired launch torque Otherwise necessary hook motor model let prop run until torque feels right Wind Less such problem getting fully wound desired launch torque wind motor enough get right torque Im glad asked Winding motor way has certain benefits First winding technique mentioned above motor consistently wound time likely react previous flights Second winding way unwinding desired torque motor will have up 15% turns simply wound launch torque launched fliers have prob lems making consistent flights proper winding technique can overcome problems since torque rather number turns given motor determines high model climbs safer use torque stead turns Bud Tenny Box 545 Richardson TX 75080 RC Sport/Van Putte continued page 17 ron differential required ar range linkages obtain Unfortu nately best method trial-and-error have patience can get just right wrong aileron differen tial better Figs 1 2 show two ways obtain aileron differential low-wing airplanes Since virtually pattern airplanes have low wings sport fliers highwing airplanes arent really concerned perfect axial rolls shouldnt cause problems course can combine both techniques provide differential possible using either technique itself Try very easy works reminds construction tech nique just discovered would like share Like modelers often use vinyl spackling basic construction repair jobs Spackling great use cause fills small holes well easy sand easy sand because soft relatively porous both char acteristics can problems paint over because paint absorbed spackling finish duller adjacent areas After sanding down spackled area give shot Hot Stuff Zap other light sanding paint goes much uniformly TA C Times newsletter Temple Texas Aero Modelers Model Airplane Club edited Dan Amburn comes gem worth sharing Happiness Finding out new next door neigh bor Jersey Jim Martin landing ten sec onds before receiver battery dies finding out loud crunch heard backing car out pit area rotten board accidentally flying through tree touching limb cleaning plane suddenly 78 Model Aviation