REFLECTOR: Adjusting wing incidence

[Scott Baker]

Peter,
With only the lower strake in place, the center section spar will twist with the unsupported weight of the wings attached.  You many not have a problem at all.  Be sure to support to the trailing edge of the wings to relieve stress on the cc spar.
Scott B
  ----- Original Message ----- 
  From: Peter Braswell 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Wednesday, September 14, 2011 6:56 AM
  Subject: REFLECTOR: Adjusting wing incidence


  All,
  After attaching my lower strake and comparing the angle between the strake and wing, things didn't look right.


  After going back and verifying the right measurements off the spar to get the strake aligned properly (they were correct) I remeasured the incidence of the wings.  With the firewall 90 degrees, the right wing was off level about 1.1 degrees.  The left wing about the same.  


  Though not a tragedy, I'm puzzled.  This seems like a lot to be off with the wings bolted directly to the spar.  Is this common?


  At any rate, I understand adjustments can be made by shimming out the wing attach bolts.  I was wondering how folks are doing this?  Washers seem the most obvious, but maneuvering them in there might be tricky.  Was wondering if anybody has fabricated a bushing out of aluminum tubing or something similar to act as a stand-off, whether that's safe and if so, what material should be used (aluminum, steel, ???) or should I stick with washers?


  TIA,
  Peter

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