Re: Re: F1D CG poll

From: <RLBailey_at_care4free.net>
Date: Mon, 17 Dec 2007 19:13:47 -0000

Tapio

I recommend CG at 80-85%, no further back. Very smooth air is flattering the model trim as you will find when you fly in turbulence!

Bob

  ----- Original Message -----
  From: Tapio Linkosalo
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Monday, December 17, 2007 2:07 PM
  Subject: Re: [Indoor_Construction] Re: F1D CG poll



  On Mon, 17 Dec 2007 RLBailey_at_care4free.net wrote:

> As you bring the weight down, the pitch inertia will also come down and
> will improve thestability as a result. This means you may then be able
> to move the CG back a little. How much, I can't say.

  Thanks, this is something to consider for my next models. Indeed I have
  been wondering, how critical the trim of my model was at 100% CG. It
  seemed to mush slightly when in turbulence, and on the other hand, the air
  in the hall was super-smooth, so I gather my trim was a bit on the extreme
  side. But, cannot really test much further with that model, as I had 50mm
  spacer to bring the motor forward, and the wing is at the aft of the motor
  tube, so moving it further back would take the back support onto the
  sub-boom, and I wonder if that is solid enough for the flight loads. So I
  need to loose 100+mg on the tailplane and tailboom to get more room to
  shift the CG.

  -tapio-


   

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Received on Mon Dec 17 2007 - 11:14:02 CET