I think that the sooner you combine the flows from the separate exhaust ports, the quieter the exhaust note becomes. Of course, you reduce scavenging as you move the cross-over closer to the ports. This may not matter much on the RX-8, however.

At 07:48 PM 5/4/2005, you wrote:

After hearing the plane last fall, I can tell you that both the sound level & 'tone quality' are a refreshing departure from typical rotary sound. If Paul finds that he's making adequate power with reasonable fuel economy, he will deserve credit for an amazing 'find'.

Charlie


Steve Brooks wrote:

Paul,
Thanks for the photos.  You're right, its pretty simple.  I'm surprised that
it's not louder.

Steve

-----Original Message-----
From: Rotary motors in aircraft [ mailto:flyrotary@lancaironline.net]On
Behalf Of Paul
Sent: Wednesday, May 04, 2005 8:48 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Rotary Canard - was home again


Hi, Steve and thanks for the reply.  I am running what I believe to be the
simplest and most bullet-proof exhaust going. I am using the stock cast iron
manifold, (which does a great job of absorbing engine pulses), with a short
8 inch long exhaust pipe. Total weight is 12 pounds.  See attached pics.
Everyone at the flying field tells me that it is no louder than the
Lycomings....just a "different" sound some say.  Hope this helps.  Paul
Conner

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