Re: Re: measure the torque in level flight from Fred Tellier on 2007-03-19 ([Indoor

From: Fred Tellier <fred-tellier_at_cogeco.ca>
Date: Mon, 19 Mar 2007 08:33:33 -0400

Hi Ignacio

The 1st wind happens as soon as the motor is tied and I leave it wound until I tie the next motor, probably a couple of minutes. The next wind is at least the next day as I am usually too bored with motors by the time I have made up a bunch. After the second wind again at least several hours before the third but usually another day. I don't leave the motors wound for very long, just while I record the information on the wind. I used to give the motors longer at torque but found that the amount of stretch of the loop after winding is not any more after several minutes so I just wind record and unwind. Note unwind, I don't let the motors spin off the turns real fast as I think that it may damage the rubber.
While on the topic of motors I tie the motors already lubricated, if you use the double overhand knot they don't slip, or untie even if lubed.
As you may have noticed this is not done at the flying session but before hand, I always have a lot of motors tied in advance, with lengths from 8.5 to 9.5 inches, I like to fly not make motors and cut rubber while at the contests.

Fred

  ----- Original Message -----
  From: izgo
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Sunday, March 18, 2007 11:51 PM
  Subject: [Indoor_Construction] Re: measure the torque in level flight

  Fred,

  This sounds as a nice way to break in motors. I will put
  in practice. But can you tellme about time intervals:

  How much time you rest motors between each stage?
  And how much time you rest them before using for flight?

  Ignacio.

  Original message from Fred T.:

  FT> As for break in I prefer winding as it tells me the amount
  FT> of turns a motor will take to a given torque. I learned this
  FT> from a very smart young man Doug Schaefer, he called it the 3
  FT> wind break in. I wind F1D motors to .25 in/oz 1st .3 2nd and
  FT> .35 3rd I record the turns to each torque, the initial length
  FT> and rested length after each wind
  FT> Fred



[Non-text portions of this message have been removed]
Received on Mon Mar 19 2007 - 05:33:44 CET