Paul,
For those guys that just MUST have a plate type engine mount, what do
you think of this layout? The tabs at the back mount a threaded pin to
go through the rod end firewall mount. Just 3d doodling.
Bill Jepson

Why would anybody need a plate type mount?

That is REAL expensive Bill. A 18 by 18 by 1/2 inch
thick plate is 162 cubic inches. At .1 pound per cubic
inch that is 16 pounds of aluminum. At $4 a pound that
is $65 bucks for aluminum alone. You will now throw
out 80% of that material.

The situation is worse if you want to move the motor
mounts out to get clearance for a tang muffler or
turbo charger. Now the rubber bushings have a 28
inch center to center distance while the engine
is only 12 inches wide.

Yes you can piece it out of 1/2 by 2 inch al bar stock
but that is a lot of expensive high heat tig welding.
Some of the highest bending stresses are right where
it needs to be welded.

You have two gaskets
and twice the potential oil leaks. Also the heat of
the oil is more directly applied to the main rubber motor
mounts due to the high heat conductivity of aluminum.

We still haven't discussed the cost of cutting
the plate to shape. Yes it can be done on a band saw
equipped with a blade welder but most people
would do it with a mill.

Lastly the rear motor mount would not work as the
rubber rod ends used require a 1/2 inch bolt and the
plate is only a half inch thick.

IMHO motor plates mounts are a dumb idea.

Paul Lamar ...No rotor no motor.

As I mentioned just doodling because so many people seem stuck on the
idea. As an aside, if cutting a plate like this I would probably get it
water jet cut. You could leave the inside and outside edges as cut.
Totally agreed on the costs of the mount I'm planning on the beam and
P-51 style tube myself. The only reason I throw it out there is to show
the CC mount guys. The attached is the way to do the rear mt. Cutting
plate for structure water jet is the way-to-go for low stress. There are
many shops in my area, and I'm sure more down by you. now back to our
normal programming.
Bill Jepson


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