Hatz Biplane Association

That is roughly what I have, about 3.5 inches from the trailing edge. With this distance when I move the lower aileron 25 degrees up, the upper aileron moves up almost 35 degrees. When I move the lower aileron down 20 degrees the upper again moves down about 30 degrees. If I move the lower bolt about an inch further from the trailing edge so that the lower is 4.5 from the trailing edge and the upper is 3.5 they move equally. The same is true if I move the upper back about an inch. I think this occurs because the lower bolt is on the top with the hinge but the upper bolt is not. The problem is reduced as the attachment moves closer to the trailing edge.
I was wondering if anybody else has seen this.

The dimensions from the CAD drawing show 3.8" from the trailing edge to the center of the rod bearing hole for both.
I seem to remember 25 up and 20 down. You don't want them equal.

Thanks but I am looking for the location of the horns that connect the top to the bottom and there relationship to the trailing edge. It's the distance from the trailing edge to the bolt hole that I can't find. I took mine from the print and got about 3.5 inches from the trailing edge. With my connecting tube located there the upper aileron moves much more than the lower. If i move the lower aileron up 25 degrees the upper goes around 35. I think that the issue is that it's actually the distance from the hinge that's important. The lower hinge is on the same plane as the horn but the upper is not.
The print also indicates that 25 degrees up and 20 degrees down is equal to 2.5 inches and 2.0 inches of trailing edge travel. It's more like 5 inches and 4.5. Which number is correct 25 degrees or 2.5 inches of travel?

Hi Ed,
Unless I am not understanding your question, the bottom of sheet 20 shows it pretty well I thought. Does this help?
There are 3 horns - the two that connect the top aileron to the bottom, and the one that connects eventually to the stick. All three are depicted on the sheet.

Does anybody know the location for mounting the aileron horns on sheet 20? I can't seem to find it anywhere.