Trim Question

[Nat Penton]

Dan are your vert rolls axial ? What % rud/elev mix ? Any other mixes ?    Nat Penton
  ----- Original Message ----- 
  From: Dan Curtis 
  To: NSRCA Discussion 
  Sent: Sunday, April 18, 2004 12:57 AM
  Subject: Trim Question


  Well I have run into a trim problem with a plane that I have not seen before.  Time to tap into the wealth of knowledge on the list.

  The plane generally is flying pretty nice.  Uplines/Downlines are good, minor mixing for knifeedge stuff, good feel while inverted...etc.

  Problem rears its ugly head in rolling to knifeedge.  When using small aileron movement to slowly roll into a 4/8 or 4 pt for example the plane will pitch to canopy.  Not drastically but I would say moderately, more than enough to cause a concern.  However, if you do a full 4 pt or slow roll with rudder coming in the pitch to canopy does not happen.  With good top rudder the plane is trimmed to fly very nice straight knifeedge flight right or left.

  I got to playing with is some today and when I would roll from upright to knife edge with no other input other than the aileron deflection the plane would have a predictable drop of the nose and would begin going to the canopy.

  What am I overlooking here.  Any ideas or has anyone run into this before?

  Thanks

  Dan Curtis
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