Your
correct Ernest. I should have specified an RV. I think all of the
RV's
are designed the same. I have read somewhere it is 1.25 degrees.
Just
trying to confirm.
Bobby
The direction of the engine offset, and any fin offset would also depend
on the direction of propeller rotation. The fin and engine offset must
agree.
Lynn E. Hanover
Also, you might ask your engine
mount builder if he can truly resolve a quarter of a degree. I
am sure he is pondering this issue and wondering the same
:) Jerry
My
simple (hanger engineering) approach would be to draw a straight line the
length of the left side tubes. This should be a known length. Then using
a protractor draw another line the same length at a 1.25 degree
offset. Measure the difference at the end of the lines. Then draw a line
47.5 inches (firewall to C-drive face) and repeat with a 1.25 degree offset.
Measure the difference and subtract first set of
measurements. That should provide a good estimate for how much shorter
to make the right side tubes. Washers could be use for fine tuning if needed.
The flying RV10's seem to be as much as 1/2 ball out to the right in
cruse. Not sure how much it would be without the offset. It does vary with
airspeed. Some are installing rudder trim. Van's mounts have
the offset build in. Tracy also has offset built into his RV8
mount. I think it is needed to make the plane fly correctly.
Bobby