Re: F1D longitudinal stability

From: <RLBailey_at_care4free.net>
Date: Wed, 21 Nov 2007 12:23:08 -0000

Tapio

You lucky man, having access to a big hall you can use at this time of year!

My usual method of moving the CG forward is to put some clay or similar on the front wing post. The improvement in model stability usually cancels out the adverse effect of the extra weight.

Good luck! Bob
  ----- Original Message -----
  From: Tapio Linkosalo
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Wednesday, November 21, 2007 9:00 AM
  Subject: Re: [Indoor_Construction] F1D longitudinal stability




  On Mon, 12 Nov 2007 RLBailey_at_care4free.net wrote:

>> Bob, thanks. I think I could get away with buiding a larger stab, as
>> the first one is a bit too hefty, and I could get away with lighter
>> structures. But anyway, as moving the CG forward is a better way,
>> thanks Bill for reminding about the spacers. That is the easiest way,
>> as the motor is short and heavy anyway, just bend a spacer a few
>> centimeters long to move the motor and thus CG forward. I'll try that
>> the next time I get a chance to test my F1D.

> Hope it works OK. Please keep us posted!

  Well, we had a session last Saturday in a small gym, unfortunately they
  had forgotten to turn off the air conditioning, so the conditions were
  pretty much unflyable. From the turbulent results I got the impression
  that the model might indeed work, and a 200mm (8 in) motor seemed to be
  good, with initial burst giving positive climb, and the cruise still
  maintaining height (as much as you could see in the bumpy air). Anyway,
  the moment of truth will be in the Finnish Champs on Independence Day, the
  6th December. Then we will fly in a 20m (60ft) hall, where the air was
  good the last time I visited this autumn. I'll let you know how it turns
  out :)

  -Tapio-


   

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Received on Wed Nov 21 2007 - 04:23:17 CET