X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from access.aic-fl.com ([204.49.76.2] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1000073 for flyrotary@lancaironline.net; Mon, 27 Feb 2006 13:55:54 -0500 Received-SPF: none receiver=logan.com; client-ip=204.49.76.2; envelope-from=unicorn@gdsys.net Received: from b9k4u9 (unverified [204.49.76.26]) by access.aic-fl.com (Rockliffe SMTPRA 4.5.6) with SMTP id for ; Mon, 27 Feb 2006 12:53:30 -0600 Message-ID: <000a01c63be1$16ed7920$1a4c31cc@b9k4u9> From: "Richard Sohn" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Exhaust Blowout Date: Mon, 27 Feb 2006 13:02:11 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C63B9E.05A37DB0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C63B9E.05A37DB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: al p wick=20 To: Rotary motors in aircraft=20 Sent: Monday, February 27, 2006 8:23 AM Subject: [FlyRotary] Re: Exhaust Blowout I'm not all that familiar with rotary characteristics. Puzzled why = tail pipe is such large diameter (2 pipes seam welded together). I would = think that exhaust pulse at any one moment is no greater than a single = tube diameter. Maybe someone can explain to me. -al wick Al, It seems you are right with the pipe sizes. We did a test at the last = Shady Bend meet. A small resonator box from Monty and added a 1 1/2" = exit pipe. The result(regarding noise), also subjective, was amazing, = and the engine lost only 200RPM at the top end.=20 Richard Sohn N-2071U ------=_NextPart_000_0007_01C63B9E.05A37DB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
----- Original Message -----
From:=20 al p = wick
Sent: Monday, February 27, 2006 = 8:23=20 AM
Subject: [FlyRotary] Re: = Exhaust=20 Blowout

 
 
I'm not all that familiar with rotary characteristics. Puzzled = why tail=20 pipe is such large diameter (2 pipes seam welded together). I would = think that=20 exhaust pulse at any one moment is no greater than a single tube = diameter.=20 Maybe someone can explain to me.
 

-al wick
Al,
 
It seems you are right with the pipe = sizes. We=20 did a test at the last Shady Bend meet. A small resonator box from = Monty and=20 added a 1 1/2" exit pipe. The result(regarding noise), also = subjective, was=20 amazing, and the engine lost only 200RPM at the top end.
 
Richard Sohn
N-2071U
 
 
 
 
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