----- Original Message -----

From: Tracy Crook

To: Rotary motors in aircraft

Sent: Monday, May 18, 2009 1:05 PM

Subject: [FlyRotary] Re: 20b Exhaust

Too soon to say really.  I have not even had time to assemble the builders log to get ready for the DAR. Lack of engine power is definitely not what is keeping this thing grounded though : )

Tracy

On Sun, May 17, 2009 at 6:01 PM, George Lendich <lendich@aanet.com.au> wrote:

Tracy,

Any significant back pressure to speak of?

George (down under)

----- Original Message -----

From: Tracy Crook

To: Rotary motors in aircraft

Sent: Monday, May 18, 2009 12:11 AM

Subject: [FlyRotary] Re: 20b Exhaust

In general, the bigger the exit pipe, the louder the exhaust will be.  I used 2.25" which I think is about the minimum for a 20B.

Tracy

On Sat, May 16, 2009 at 9:28 AM, <jewen@comporium.net> wrote:

I have fabricated my exhaust manifold/tangential muffler for my 20b.  All I have left is to fit and weld the exhaust pipe.  I would like opinions on the size the exhaust pipe should be.  This is in a pusher application (Velocity) with a relatively short run from the muffler to the exit point.  Similar installation to Al G.

Thanks,
Joe


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