[NSRCA-discussion] OS140 Header/Pipe

[colin chariandy]

I ran that muffler for quite a while and have to admit that I like better than a pipe. I did run the full length Mac header and at that length with a 15X11 4B prop was able to get a very smooth and constant speed with great breaking but sacrificed top end power a bit. You can almost run the needle valve anywhere with that set-up as it extremely forgiving.
 
It is a muffler so theoretically reducing the header length shouldnt make much difference...but mine did run very well at full length.
 
Colin.

--- On Fri, 2/6/09, Jay Marshall <lightfoot at sc.rr.com> wrote:

From: Jay Marshall <lightfoot at sc.rr.com>
Subject: [NSRCA-discussion] OS140 Header/Pipe
To: nsrca-discussion at lists.nsrca.org
Received: Friday, February 6, 2009, 8:29 AM








 
I am installing a OS140RX engine and OS Header, and a Bolly MF 480 R pipe into a new (Impact) airframe. From the “Bolly Book” this appears to be more of a muffler than a tuned pipe. This model is not in the “book”.
 
Is anyone running this configuration?
 
Space is a little tight and I was thinking of cutting off some of the header but have no idea of the implications of this move. Evidently Bolly no longer produces CF pipes and I can find no specific information on this setup.
Jay Marshall 
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