Characteristics

[John Ferrell]

I have noticed my multi-axis autopilot has developed a divergent phugoid lately.
refer to http://www.flightlab.net/pdf/7_LongitudinalDynamicStability.pdf
John Ferrell    
http://DixieNC.US

  ----- Original Message ----- 
  From: Bob Pastorello 
  To: discussion at nsrca.org 
  Sent: Saturday, January 01, 2005 2:47 PM
  Subject: Re: Characteristics


  Nat, what is the "S" axis?
      And why should I solve loop tracking?
      My multi-axis autopilot does that for me.

  Bob Pastorello
  NSRCA 199  AMA 46373
  rcaerobob at cox.net
  www.rcaerobats.net


    ----- Original Message ----- 
    From: Nat Penton 
    To: discussion at nsrca.org 
    Sent: Saturday, January 01, 2005 1:24 PM
    Subject: Characteristics


    Ray your outline of the variables affecting loops makes sense. To solve the problem we could place a vane sensor ahead of the fin and have automatic fin adjustment. It would not require a servo and may eliminate the need for right thrust. Lets assign this project to Bob Pastorello.

    Now we need to address why pattern planes pitch down in S and L yaw and pitch up when inverted.    Nat


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