[NSRCA-discussion] Turbulence

[Nat Penton]

I made the attached comment regarding directional stability tongue in cheek. One of my early Express designs had so little directional stability it would fall flat thru of a stall turn. Interestingly this was the only place I was aware of a problem.

I had one airplane with a 15% stab back in the 80s because I rationalized the more forward CG would reduce pitch changing effects of turbulence. I can't remember the results <G>.

High inertia damps the effects of turbulence - and works fine if you leave out the snaps and get used to the change in roll timing <G>.                                   Nat
  ----- Original Message ----- 
  From: Nat Penton 
  To: NSRCA Mailing List 
  Sent: Thursday, October 11, 2007 1:24 PM
  Subject: [NSRCA-discussion] Turbulence


  Simple physics tells us moving the center of lift inboard ( more taper ) will benefit flying in turbulent conditions. As a side note, since turbulence is fractal, speed will benefit.

  Back to subject, and question. Directionally it appears the less directionally stable the airplane the less change in direction due to a gust. We prefer the airplane moves over without a change in direction.

  Where and how do we draw the line on direction stability ?


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