Re: F1D longitudinal trim

From: <RLBailey_at_care4free.net>
Date: Mon, 13 Nov 2006 11:42:01 -0000

Tapio

It sounds as if you would benefit from moving CG forward another 5 mm to give a quick stall recovery (good for turbulence). Glad it's OK so far!

Bob

  ----- Original Message -----
  From: Tapio Linkosalo
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Sunday, November 12, 2006 8:09 AM
  Subject: Re: [Indoor_Construction] F1D longitudinal trim



  On Sun, 5 Nov 2006 RLBailey_at_care4free.net wrote:

  : CG is much too far back; suggest you move CG forward by up to 10 mm and
  : retry. You need to eliminate the deep stall first.

  Bob, you hit the nail right to the head. I moved wing 10mm back, and now
  the stall behaviour is much better. The model is still rather sensitive to
  decalage, but now there is a window between stall and dive.

  Nick wrote:

  : If the Fuse is floppy, It will come back to haunt you, It took Fred
  : Tellier point that out with my model for me to see that.

  I also added some boron to the fuselage, and I think this made the
  behaviour of the model more consistent. I managed to ged some
  decent-looking flights yesterday. Not much duration, as it seems obvious
  that my rubber is too thin, after some climb on the burst I start to loose
  altitude on cruise. But the model is seriously overweight, as well as the
  motor tube is battered, so I think I better build a new model rather that
  use thicker rubber and witness the tube collapse under load. In any case
  this first attempt gave me some nice data on model layout and trimming,
  that I can use when building new models.

  -Tapio-


   

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Received on Mon Nov 13 2006 - 03:56:26 CET