REFLECTOR: castor angle.

[Lou Stedman]

John educate me. What is a pivot bolt?

Lou Stedman
Velocity N7044Q
Olean, NY
  ----- Original Message ----- 
  From: John Dibble 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Sunday, November 23, 2008 7:44 AM
  Subject: Re: REFLECTOR: castor angle.


  I experienced shimmy at 30 kn while braking.  The shimmy was in the right main.  The problem turned out to be a bent pivot bolt.  You can check for that by loosening the nut and turning the bolt to see if there is a tight and a loose spot.  If there is, a short term fix is to leave the bolt in a tighter position  (check that gear extends properly).  That will make it tighter and eliminate shimmy if that's where it's coming from. 
  John 

  Lou Stedman wrote: 

    Got a question for the group. I have read that castor angle is important to prevent wheel shimmy. I am led to believe that the castor should be level. I have fixed gear. While repairing my main landing struts I had to remove about two inches of length. I now have a very slight wheel shimmy on landing at about 50 kts. while breaking.  I am wondering if this could be caused by a change in the angle of my nose wheel castor. if so how do I change it? Lou Stedman 
    Velocity N7044Q 
    Olean, NY 
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