Sustaining Knife edge?

[wgalligan]

Try moving the cg forward.  This may help in the pitch to belly.  If its tail heavy that could explain why it doesnt need much rudder in knife edge or mix up elevator to rudder.

WG

  ----- Original Message ----- 
  From: Ihncheol Park 
  To: discussion at nsrca.org 
  Sent: Monday, June 09, 2003 2:29 PM
  Subject: RE: Sustaining Knife edge?


  I just realized that I forgot to mention another thing.  
  The plane pitches to belly when rudder is used during level flight. 

  Will try all the suggestions received this week and post result here.
  Thank you,

  Ihncheol Park
    -----Original Message-----
    From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of jim ivey
    Sent: Monday, June 09, 2003 11:16 AM
    To: discussion
    Subject: Re: Sustaining Knife edge?


    Ihncheol,
    Fly the plane looking at the bottom of plane in knife edge in the same circumstances as you did looking at the top. If you have the same symptoms down wind, then your plane is probably ok, I think your problem is the fact that airspeed + wind speed is considerably different upwind than it is airspeed - wind speed downwind. In other words the rudder has help holding the plane in knife edge, upwind. You also may be a little nose heavy, which will aggravate the problem.

    Jim Ivey

      ----- Original Message -----
      From: patterndude at attbi.com
      Sent: Monday, June 09, 2003 12:57 PM
      To: discussion at nsrca.org
      Subject: Re: Sustaining Knife edge?

      How much right thrust are you compensating for when flying L to R (seeing top 
      of plane)?
        I think P-factor should pull the plane to the belly (L to R) or canopy (R to 
      L), so that is not the answer.  

      --Lance
      > 
      > 
      > Ihncheol Park wrote:
      > 
      > > I have a question to ask.
      > > Flying condition was very good.  Almost no wind on ground level, maybe a few
      > > MPH in the air (flying height).  Wind direction left to right.
      > > When I fly knife edge from right to left facing the top of the plane, very
      > > little rudder is required to stay on without going up or down.
      > >
      > > However, from left to right facing the top, the plane just can not stay and
      > > keep dropping.
      > >
      > > What could be the cause of this?
      > > Side thrust?
      > >
      > > Thank you,
      > >
      > > Ihncheol Park
      > >
      > > =====================================
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      > > # discussion-request at nsrca.org
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      > > #
      > 
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