Is the top of the rotor similar to the top of a wing? 12 a

The air is flowing over the rotor face from left to right or
maybe from right to left.

The question is: where is the center of pressure?

That will change the lever arm length applying torque to
the e-shaft.

On a wing the pressure is reduced as the airflows over the wing?

What is the real value of the pressure on the face of the rotor.

In a piston engine there is no doubt that the center of pressure
is in the center of the piston because no airflow crosses the top
of the piston.

IMHO until someone figures out how to survey and measure and
record the instantaneous pressures on the face of rotor in a
grid pattern I don't think we will know the answers

Paul Lamar

Apples and oranges is it not ?

The wing is operating in free air whereas the rotor chamber, the side plates, the ports and the moving rotor itself all interact and probably far faster than the thick, ooey, gooey air could return to a free state after being disturbed.

John Rogi

I don't agree. That is the only difference in a Wankel and a piston.
If fact the air velocity (squish flow) over the top of the curved rotor is important
relative to a point on the surface of the rotor. At low RPM's the air velocity is highest
where the BSFC is the worst. At high RPM's the surface of the rotor is probably moving
as fast as the air. That is where the BSFC is the best.

Paul Lamar

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