Hatz Biplane Association

That all looks fantastic. Just heading to bed, so well study this tomorrow. I'm just getting warmed up for my center section as the ribs get glued up in my house. Looking good!

Looks very nice! I wish I'd have done what you did by gluing a wood plate around the N strut attach brackets...something to glue the fabric to when covering.
I wanted that little bit of curve to the top of the ribs that continues from the main wing airfoil shape, so I glued balsa to the top of each aileron rib, sanded it to the slight curvature of the original airfoil shape, then glued some ultra thin ply (R/C modelers ply) on top of the balsa so that the rib stitching wouldn't pull into the balsa. My idea, originally, was to keep the curvature going from leading edge to trailing edge. But then I got to thinking about the acro mounts today and how they make the leading edge radius of the aileron larger than the trailing edge of the wing just ahead of the aileron. This causes the detached airflow ahead of the aileron to reattach to and make the aileron more effective. So, I bumped up the top of the aileron surface. This also has the effect of creating a better transition of airflow from the wing onto the aileron when the aileron is fully deflected. There is no sudden break at the hinge. I know, there I go again, if I wanted a Pitts, I shoulda built a Pitts. But, I've got the coolest old time looking biplane with a nice roll rate! Life couldn't be better short of winning the lottery!

Beautiful wood work, Ron! Thanks for the photos.

Thank you very much and thank you for sharing that information too. I may have to do a bit more head scratching now as I really like that idea. Shouldn't be to hard to and I'm at a perfect point in the aileron construction to consider it.