Side/end plates are where the real weight loss is to be
had. Mazda has even done the parts already, published a paper on it and
everything! The LeMans engine used detonation gun coated and diamond
ground end and intermediate housings. They ran 24 hrs flat out and won
one of the worlds biggest races over all. This is also the safest way to
lose weight off the engine, it has already been tested by the factory!
Foamed metal and all this other stuff is fine, but getting something to
market is the key.

A rotary with aluminum end and center housings would
have such a HP to weight advantage it isn't even funny.
Bill Jepson

It should be possible to cast these from aluminum using factory parts
for templates.  You would probably need to put a thin steel sheet on for
wear protection.

I can dream of a 1-rotor with aluminum ends . . .

Keith Wood

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