The spars won't care if they are a few degrees one way or the other. But if
you happened to get the rib lay-out from the Pietenpol family, it shows
where those uprights are intended to be. However, the strength of the wing
isn't very sensitive to that angle, as long as it's not too far off.
Just to be clear, I'm talking about the angle of the spar with regard to the
chord or the bottom of the wing. I'm not talking about the angle of
incidence.
David Paule
> <Lowellcfrank@yahoo.com>
>
> I used the 90 Deg, from the cord line as Mr R. suggested.....
