Paul,
I was curious to see how long it would take the pulse ( sound wave) of
the closing rotor to travel the distance of the tuned manifold length of
21.36"

My figures using 770 mph at sea level suggest 1 millisec.

Now I'm interested to understand how much effect that has on the
incoming air speed or VE.

George ( down under)


Where did you get 21.36?  Are you sure it is not 21.37? :)

770 MPH is 1130 FPS. The wave travels out and back. It also has harmonics.

Not much. It is the air velocity you are interested in.
In theory there is no long distance molecule motion
in a wave.

Paul Lamar

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