Paul--

The attached will, hopefully, reflect my concern over dimensions for
motor mount design sent to me (Thank You!). Assume the top view of what
you had sent, previously, was reversed as engine will rotate
counterclockwise from pilot's perspective.

Tom

It helps if you forward quote the old messages keeping the old subject
heading. Helps me figure out what you are referring to.

All top views sent are correct. That is not the oil pan. That
is the air intact plenum.

With a 2.85:1 gear box the prop rotates clockwise from the
pilots view. Same direction the engine turns.  The correct direction
for most props. Counter clockwise with the 2.17:1 gear box.
Requires special custom props and develops less HP. Which gear
box do you have?

1/8th inch wall on all the short tubes and washers.
The diameter depends on the size of the bolt heads.
I would say one inch minimum OD.

The Barry rubber bushing cups are 1.5 inch OD as the bolt is
a half inch.

Upper long tubes are 5/8th OD .049 wall and the lower long tubes
are 7/8th OD .049 wall.

The link rubber rods ends are from McMaster Carr.
Here is the pic and catalog page again.