Then again, I'm not convinced it would be an improvement to lower the
tone.  My opinion is that people aren't used to the sound.  Making it
more big-fart Continental/Lycoming-like isn't better, just familiar.
I think we need to get more people exposed to the smooth and powerful
sound of not reciprocating..

I do think it would be better for the engine to not sound like a two
stroke, which I think some people may unfortunately associate with the
Wankel.

Matt-

When people comment that my Turbo 20B sounds like a vacuum cleaner, I simply
ask them if they'd expect a turbojet to sound like a piston plane.  Of
course not.  I like the sound of my 20B turbo.

Tom Parkes