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Old 02-15-2011 | 08:06 AM
  #23  
MTK
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From: Whippany, NJ
Default RE: DERIVATIVE, New 2X2


ORIGINAL: mjfrederick

Matt,

Is there a reason you decided to remove the built-in down thrust by moving the wing rather than making a wedge shim for the nose ring and adjusting the angle of the firewall when you glue it in? Just seems to me like that would have been easier than filling, sanding, and recutting the wing tube holes on the fuse.

Matt
I don't want 2 1/2 degrees downtrust. The plane will need about 2 1/2 degrees right thrust for the powerplant I am planning, and that's bad enough. Putting a shim in the front to compensate is fine but it didn't solve the main issue to suit my taste

I needed to move the wing and stab to my liking regardless. That requires filling, sanding and refinishing so that I can build the mold

A side note on the existing cutouts for wing and stab. With the nose ring square, wing holes are cut to produce approximately 1/2 positive incidence; stab holes are cut to produce zero incidence.

Bulding the thing stock, the only reference you need is to make sure the nose ring is square to the reference table. If you use a different reference, you're on your own.