Since my ES wings have a difference in washout, I was concerned.  That's how a lot of this discussion got started.  And why I talked to Mr. Hollmann.

 

Since my "relative" measurements were done that showed a 1.7 degree difference in incidence at the tips, I have done measurements with actual incidence.

 

My biggest concern was that I had, for example, 1 degree of washout on one wing and .7 degree negative washout (if there is such a term) on the other wing.  That would cause the tip to stall first with the 64212 airfoil.

 

But I have 2.2 degrees on the right wing and .5 degrees on the left wing, so I do have some washout on both sides.  Keep in mind, that's at the tip.  If you move inboard 2 feet the difference in down to a much smaller number.  Not ideal, but not a death trap.

 

Mike Easley

Colorado Springs