Is there a formula to figure out how much thrust angle to put on my firewall or is it always just 3 - 4 degrees. I have an Airworld FW-190 that I will be installing the Moki 250 radial on. Plane will weight about 50lbs when finished. 110" wingspan and a pretty tall vertical. The fiberglass plate that came with the kit was at 3 degrees but I wondering if more would be needed with the bigger engine set up. Any advise would be great, except telling me it's too big of a motor

Thanks, Billy