Mr. Lamar,
     I am planning on using a rotary engine in a sport hovercraft I'm
building. I intend to build one of the "canister" type exhausts
shown on your excellent website. However, since sport hovercraft are
operated much nearer people than aircraft are, I wonder if
this will attenuate the sound enough. I expect to need another
after-muffler (I'm looking for production automobile sound levels).
Do you have any suggestions? Like aircraft, weight (or the lack of it)
is important, and space is at a premium, but I have plenty
of horsepower, so I can stand to lose a little in exchange for a quiet
exhaust.
     I appreciate any input you have, and I thank you for your time.

Regards,
Randy Bland

Automotive sound level is a tall order.
Figure on some really big mufflers.
Several in series.

Paul Lamar ...No rotor no motor.

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