12
These are illustrations from Kenichi Yamamoto's 1981 book Rotary
Engine.

Obviously an assumption was made that the pressure in the combustion
chamber was uniform and centered on the rotor face.

You can see this in the 004 illustration.

I find that hard to believe.

It is going to be very costly to measure the actual pressure map
as a function of e-shaft angle but I think it could be done with
a high speed data acquisition electronics. Like 10 Maximites.

There are ten pins on a Maximite that will convert analog pressures
to digital numbers. We probably need about 100 pressure taps.
Ten only would be a great start. It would probably take 10 or 20
usec to measure one pressure tap.

Paul Lamar


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