On Aug 22, 9:38*am, T8 wrote:
On Aug 22, 12:15*pm, Bob Kuykendall wrote:

My experience, backed by template checks on a variety of sailplanes,
is that getting the waviness below .004" is a lot more important than
making the airfoil exactly match the intended contour.

And after about a half hour of gauging the spar dips and bumps on
ships at your local airport, you can give the gauge to someone else
because you'll be "calibrated". *A 0.006" wiggle is quite noticeable
by hand. *0.003 starts to feel pretty smooth.

-T8

when I finished the wing plugs for the HP-24 they were easily within .
003, by the time we were able to make the molds the plugs had
developed a few creases where the foam core butted together. now that
the wings are made, and I've sprayed a bunch of high-solids primer on
them, there are no wiggles or waggles anymore............after I spray
the top coat and go thru the various grades of wet paper, they should
look and feel very nice.

Brad