Pepperoni,

The problem that I see is that

Based upon what? Are you an engine construction engineer specializing in
aluminum engines? Or is it just "gut feel"?

the engines run up to 6000 rpm, and are geared 3:1.

Not in cruise.

but more
problems seem folded back in with the liquid cooling.


Again: Says who? Liquid cooling seems to be a total non-issue with the
Rotaxes, the new diesels and engines in general.

--
Thomas Borchert (EDDH)