This clip is of Brian Trubee RV4 with a coax muffler.
IMHO it is less annoying :)

For comparison here is an assortment of rotaries.
Mike W. NA 2 rotor, Dave L. 13B turbo,  Al G. NA 3 rotor.

Borrego Springs rotary flyin
http://www.youtube.com/watch?v=dibuqenWcOk

RX8 P-port on the dyno.
How to build a P-port
http://www.youtube.com/watch?v=NKJ00JsnS8A


Paul Lamar

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