Re: Re: measure the torque in level flight

From: Fred Tellier <fred-tellier_at_cogeco.ca>
Date: Thu, 15 Mar 2007 12:37:36 -0400

I guess I am not smart enough for this Indoor flying, but I fail to see what the cruising torque would tell me about my plane or prop that RPM checks will not.
The RPM at different parts of the flight tells me plane trim, prop settings and rubber power, as I never change more than one trim thing at a time and I document all flights I compare changes through RPM.

As for break in I prefer winding as it tells me the amount of turns a motor will take to a given torque. I learned this from a very smart young man Doug Schaefer, he called it the 3 wind break in. I wind F1D motors to .25 in/oz 1st .3 2nd and .35 3rd I record the turns to each torque, the initial length and rested length after each wind in a spread sheet and add flight winding data and flight info for each flying wind. Each motor is numbered and stored in a numbered bag. This info helps me choose a motor for flying. I never worry about cross section area only length and how well the motor takes turns, you will be surprised at the difference in turns motors of the same length will take. Also I find that higher turns motors usually break after the first or second flight. I also break about 10% of the motors while breaking in.
This may seem like a lot of work, but I watch TV while breaking in motors so the time passes quickly, and I find less pressure while flying as I have all motors ready to use.

Fred

---- Original Message -----
  From: torqueburner
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Thursday, March 15, 2007 11:44 AM
  Subject: [Indoor_Construction] Re: measure the torque in level flight


  --- In Indoor_Construction_at_yahoogroups.com, LeRoy C Cordes <lcordes@...> wrote:
>
> Out of curiosity - How the devil would you do this ???
>
> LeRoy Cordes

  Leroy, the way we've done it is to launch at a low torque, so that the plane only climbs a little
  after it is released. Then, when it appears to be flying level without climbing anymore, grab
  the plane, remove the rubber, and measure the torque.

  Dave Drummer



   

[Non-text portions of this message have been removed]
Received on Thu Mar 15 2007 - 09:37:56 CET