X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mv-relay-2.splasers.com ([65.119.109.149] verified) by logan.com (CommuniGate Pro SMTP 5.0c1) with ESMTP id 689589 for flyrotary@lancaironline.net; Thu, 01 Sep 2005 18:11:17 -0400 Received-SPF: none receiver=logan.com; client-ip=65.119.109.149; envelope-from=mike.wynn@spectra-physics.com Received: from usmtv-mx01.spectra-physics.com (firewall [172.22.1.10]) by mv-relay-2.splasers.com (8.11.6/8.11.6) with ESMTP id j81KYZw05328 for ; Thu, 1 Sep 2005 13:34:35 -0700 Received: by usmtv-mx01.spectra-physics.com with Internet Mail Service (5.5.2653.19) id <3WZLW0HS>; Thu, 1 Sep 2005 15:10:06 -0700 Message-ID: <5FA49D34561C5945BA9258B31BF648800C5D6C9B@usmtv-mx01.spectra-physics.com> From: "Wynn, Mike" To: flyrotary@lancaironline.net Subject: Single rotor exhaust header design?? Date: Thu, 1 Sep 2005 15:10:05 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C5AF41.E86D0100" This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C5AF41.E86D0100 Content-Type: text/plain So a quick question: If you have a Renesis based single rotor with two exhaust ports each pulsing at the same time, what is the best arrangement for the headers? The best length for the primary is going to be determined by the rpm - so should be the same as for any other rotary. But is it best to run two independent pipes and concentrate on minimizing back pressure, or, if you were to make one primary twice the length of the other one and then join into a single pipe perhaps you get some scavenging? How do traditional `bunch of bananas' headers compare with VAM/tangential in terms of engine performance? Lynn, Leon ??? Cheers Mike ------_=_NextPart_001_01C5AF41.E86D0100 Content-Type: text/html Content-Transfer-Encoding: quoted-printable Single rotor exhaust header design??

So a quick question:

If you have a Renesis based single = rotor with two exhaust ports each pulsing at the same time, what is the = best arrangement for the headers?

The best length for the primary is = going to be determined by the rpm - so should be the same as for any = other rotary.  But is it best to run two independent pipes and = concentrate on minimizing back pressure, or, if you were to make one = primary twice the length of the other one and then join into a single = pipe perhaps you get some scavenging?


How do traditional `bunch of bananas' = headers compare with VAM/tangential in terms of engine = performance?


Lynn, Leon ???

Cheers
Mike


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