Here is my issue. I have laser cut short kit, and I need to drill the motor mounting holes. The plans call for 3 degree down angle (Which is built into the firewall mounting) and 2 degree of right thrust. At least that's what my memory thinks it is.

But for this conversation it doesn't matter.

A quick question first. Even with the right thrust, is the center of the prop still centered, left-to-right, in the fuse? Or is the mounting point of the engine centered and as a result of the right thrust the prop is not centered?

OK, assuming that the prop needs to be centered side to side even with side thrust built in, the engine mount holes will have to be off to the left side of center on the F1.

So what's the method for determining how far to shift the mount holes? And what's the method for shimming the motor mount to induce the correct amount of right thrust. I'm sure some trigonometry is involved. But I'm really rusty at trig.

I'm going electric on this particular plane, so the easiest way to induce right thrust is to shim the stand-offs on the left side.



TIA

Lyndon