JMLBlues@aol.com wrote:

I don't know the numbers on the size of the combustion chamber (rotor
projected area and such), but the 1000 psi combustion pressure is probably a
tad high. I'd expect to see no higher than 650 psi naturally aspirated, and
maybe 800 psi boosted. I'm unsure, but I think its unlikely for any gasoline
engine to get to 1000 psi without being heavily into detonation. In a Mazda,
I think rotors, rotor housings, and end housings would break after not much
time at 1000 psi. Diesel piston engines are designed for combustion pressures
of around 3000 psi, which is one reason why diesels are so heavy.

Jon Lauter
Rotary Power Marine Corporation

I was just thinking about that. The lower chart of rotor bearing load
gave me an idea. Perhaps one of the reasons it is possible to get
730 HP out of a 13B at 10,000 RPM is the combustion pressure cancels the
centrifugal force generated by the weight of the rotor. The minimum load
RPM point on the chart moves up in RPM as the engine is turbocharge 
boosted at higher engine speeds.

We are left of course with higher main bearing loads and apex
seal jump off problems.

Paul Lamar

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