Cowl Hinge Shims

RV8 Builders

Looking at the shims for the piano hinges on the firewall
What thickness did people use?
Top
Sides
Bottom

Just trying to get a starting point.

Thanks, in anticipation.

Rob

Shims

Mine is a 7A with Skybolts but the concept is similar. I used .032". However, I added a strip of carbon fiber and a strip of fiberglass over it. That's about .020" thickness of stiffener material. Without the added material, I would use .025". Even if its slightly shy, the micro, primer and paint will take up the difference.

Shims

Larry

Thanks that is what I needed.


Thanks
Rob

followed the instructions but..

I followed the plans but the top hinge is curved and uses a smaller rod to go through the curves. this makes the cowl loose at the top. If I did it again, I would increase the shim thickness where the piano hinge flattens out at the top to keep the cowl tighter to the top skin/firewall.