I drew the parts in Rhino, exported them to SW, drafted, filleted and shelled them. Exported them back to Rhino, added the flange and rendered it. Whew! It needs a few more internal ribs.

It would weigh about 10 pounds in aluminum with a .2 inch wall and about 6 pounds in magnesium. Tracy's current set up is about 8 pounds for the adapter plate, spacers and bolts.
The 4130 steel schertz beam 30 inches long weighs about 5.3 pounds for a total current weight of around
13.3 pounds. A mag casting would be about half that and an aluminum casting would give only a 3.3 pound saving.
However the mold for the casting is going to cost a lot so the price of ten or 15 will be about $500 or $600.

How many people would be interested in a mag casting?

Paul Lamar ...No rotor no motor.

Paul,
Have you included in your castings "Machining costs' .
George ( down under)


Yes that is including machining. It is a guess however.

Paul Lamar ...No rotor no motor.


How many inches would that move the engine back or would I have
to make a new engine mount???? Karibian

Three or four inches. I don't suggest it for existing motor
mounts with the Schertz beam under the rear housing.
There are a few out there with the rubber bushings
on the adapter plate. That would move the engine forward
about one or two inches. I have one of those and Bob White has
one. Maybe Jerry Hey too.

There are also one or two with the Schertz beam between
the adapter plate and the rear housings. Those would not
move the engine fore or aft at all. Mark Supinski has one
of those.

Paul Lamar ...No rotor no motor.

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