Dan asked me to describe my installation for interpolation by others.
It is an 1835 VW with large jugs, Dan Diehl case and accessory drive,
Zenith carb, direct drive, 52" Culver Prop, and standard engine mounts with 1
inch extensions. I measured from the firewall to the middle of the engine to
assign its moment, hence the negative number due to moving forward. I used this
method after the way Cessna assigns their arm/moment in their POHs. I whole
heartedly agree with both Larry and Mark, would remark that this is a strictly
simplified illustration using the basic weight and balance formula. What I
would recommend to anyone desiring to move the engine forward is to make
extensions and mock up the results without the cowling and weigh the results.
With Great Plains recommending 3 inches forward to restore a CG, it seems
reasonable for light weight engine installs to need nearly 3 -4 to stay on the
forward side. Once I get mine actually in the air flying, I will experiment
with this and post the results.
Colin Rainey KR2(td)
crain...@cfl.rr.com
Sanford, Florida
FLY SAFE!!!!
