Hatz Biplane Association

I need help with the spar dimensions. I have looked in the previous newsletters and on this forum with no luck. I assume I am missing this information in my set of plans and would like to have the correct dimensions before I butcher up a spar. Is there a correct angle to bevel the spars? I have been playing with autocad and using what info I have been able to get from my plans. I have 82 degrees on the top but it appears the bottom of the spars may have a slight bevel. Also is there a correct dimension for the height? I have 4.775 in. for the front of the spar and 4.885 for the rear. I print that out to scale and it is a close fit in the rib. I appreciate any input.
Thanks
Dan

You may want to take a look at the thread "Rib dimension discrepency" in the Hatz classic forum

Juerg

ok that helps. My ribs are right on for the 25" center to center dimension but they are about .025" taller in the spar opening. I assume I will have to bevel the spars to the 4.900 dimension or maybe even a few thousands bigger and fit each rib to be a snug fit ? If I have to remove a slight amount of wood from the ribs to fit is it better to remove from the top of the opening or bottom, or does it matter.
dan