Re: Re: seeking some F1D tips?

From: Fred Tellier <fred-tellier_at_cogeco.ca>
Date: Mon, 19 Mar 2007 08:41:33 -0400

I use one of the torque meters that the Polish flyers make and sell but I recalibrated it in in. oz. Don't worry about matching values as everyone's winding will produce somewhat different results. Try to get more turns, try different stretch amounts, different methods of reducing the stretch while winding, but get the habit of winding slowly, Jim Richmond gets more turns in than anyone I know and is takes him a really long time to wind.

Fred
  ----- Original Message -----
  From: izgo
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Monday, March 19, 2007 12:22 AM
  Subject: [Indoor_Construction] Re: seeking some F1D tips?


  Fred,

  After all, Thanks very much Fred for taking all this work on
  writing with details all this tips. Your points of view are
  priceless and makes a lot of sence, simple and precise details.

  FT> The Rpm at various parts of the flight is very important for me
  FT> as I can tell if my flight attitude ( nose up ) is correct and
  FT> helps adjust the decalage to get optimum trim. It is even more
  FT> important when one starts using a VP as the closing of the
  FT> blades can be tracked. I take RPM readings at one minute
  FT> intervals through the flight.

  Its time to put in practice all said. As I can understand counting RPM
  along all flight is very important, Its like taking a radiography of
  flight. :) But... still I have to learn how to read all data,
  understand what it means and how to do litle changes based on all that
  info.

  Right now im using your Excel program to practice some winding
  and at same time comparing some different rubber batches. The
  numbers (energy) I'm getting are far from the tests you have
  done. I suspect im having problems reading torque correctly
  because reading errors are +/- 0.01 in-oz.

  For example, I'm getting averages 4300 FT-Lb/Lb from Tan II 5/99
  and 3950 FT-Lb/Lb from SS 04/2006, so 5/99 has about ~9% more
  energy than SS04/2006. Up to here sound reasonable, but im far of
  reaching those 4700 FT-Lb/Lb you are getting. Dunno if im winding
  too bad of if I measuring too bad..OR if this rubber is not so
  good.

  What torquemetertype you use? I mean, how much torque per
  360 degree and how accurate is?

  Ignacio.



   

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Received on Mon Mar 19 2007 - 05:41:42 CET