Re: Rudder size effect on control

From: <RLBailey_at_care4free.net>
Date: Thu, 27 Sep 2007 10:49:41 +0100

Tapio

I had the same problem with F1D's and believe lack of rudder area was a contributary cause. Also it's neither a necessary or sufficient condition, so it may not necessarily cure it.

I sorted it just in time for the European Champs!

Bob

----- Original Message -----
  From: Tapio Linkosalo
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Tuesday, September 25, 2007 7:28 AM
  Subject: Re: [Indoor_Construction] Rudder size effect on control



  On Sat, 22 Sep 2007, Bill Gowen wrote:

> I've been told that not enough rudder area will cause a Dutch roll which
> is a rolling oscillation from side to side. A commercial SO design of a
> few years back had very small twin rudders and was prone to this
> problem.

  I had a FW Stieglitz No-Cal, that - I think - suffered from too little
  rudder area. It flew OK on moderate torque, but the launch was worse: the
  torque from the prop dropped the left wing, but the model started to
  sideslip to the left, keeping banked and nose slightly up attitude, and
  flying straight (to the wall). Once the torque dropped the model started
  turning nicely. The initial flight looked like a bit more of rudder area
  would have turned the model into the slip direction and would have
  restored normal flight. I think some pennyplanes that I used to have also
  showed same kind of behaviour.

  -Tapio-


   

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Received on Thu Sep 27 2007 - 02:51:15 CEST