ail control setup

[Bob Pastorello]

Again, my opinion, shorter is better, unless the horizontal angle of the rod/servo arm/control is too extreme and stresses the clevis pin/servo arm hole.
    Generally, nearly always these days, I put the shafts rearmost, so that I can have a shorter rod.  Check my Excelleron or Icepoint page.

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


  ----- Original Message ----- 
  From: twortkoetter 
  To: discussion at nsrca.org 
  Sent: Tuesday, February 08, 2005 7:47 PM
  Subject: RE: ail control setup


  Thanks Bob if I keep the linkage square to the servo and hinge line I am at the tangent that Troy is talking about.  The second part of my question is should the output shaft be closer to the L.E. or T.E. of the wing(asked poorly in my first post)

   

  Tim

   

  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On Behalf Of Bob Pastorello
  Sent: Tuesday, February 08, 2005 6:19 PM
  To: discussion at nsrca.org
  Subject: Re: ail control setup

   

  For fear of impinging on Troy's notes....in "laymen's terms" (that's ALL of us, BTW, Tim)....as much as possible, in all cases, ALL the time, have control systems "square, straight, perpendicular"....at neutral, a line drawn across the servo from the clevis to the center of the shaft should be parallel to the hinge line of the control surface.  A line from the control surface takeoff point TO the servo arm/clevis should be 90* to the hinge line, and straight to the servo arm.  The attachment points should always be "short on the servo end, longer on the control side" to avoid flutter, and keep mechanical leverage on the side of the servo.  And the last item...the "holes" for clevises should be set so that you get recommended maximum throws with the tx set to 100% or more travel, the servo takeoff point as close to the shaft as it can be, with the control takeoff point as far OUT from the hinge line as IT can be.

   

  It can be explained a LOT more complicated than this, and probably easier.  This is just the way I think of it.


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

   

   

    ----- Original Message ----- 

    From: twortkoetter 

    To: discussion at nsrca.org 

    Sent: Tuesday, February 08, 2005 5:56 PM

    Subject: ail control setup

     

    I just received my Jan K-factor yesterday, great timing since I am re-doing
    my ail control setup.  I was one of the ones that have my dual rates at 40%
    low and 50% high so I certainly found Troy's article interesting.  This will
    be my second year flying intermediate and I sure have a lot to learn,
    especially when it comes to airplane setup not to mention flying... but
    that's all part of the fun.
     
    Now to the question, which way should I mount the servos, should the control
    arm face the leading edge or the trailing edge?  I had it set up with the
    servos facing the trailing edge to make the linkage the shortest possible
    but I am going to go from 2-56 music wire to c.f. rods and don't know if the
    distance to small.  I could flip the servos and have more room but should I
    keep the linkages as short as possible or is it not as important due to the
    stiffness of the c.f.
     
    I am also having a hard time picturing what Troy was saying about the
    tangent line when it comes to attaching to the servo, could someone explain
    it in lay mans terms?
     
    Thanks,
    Tim Wortkoetter
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