X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao11.cox.net ([68.230.241.28] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1000072 for flyrotary@lancaironline.net; Mon, 27 Feb 2006 14:05:08 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.28; envelope-from=steve@stevet.net Received: from [192.168.2.203] (really [68.6.58.190]) by fed1rmmtao11.cox.net (InterMail vM.6.01.05.02 201-2131-123-102-20050715) with ESMTP id <20060227190243.HAPU6244.fed1rmmtao11.cox.net@[192.168.2.203]> for ; Mon, 27 Feb 2006 14:02:43 -0500 Mime-Version: 1.0 (Apple Message framework v746.2) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-7--448879492 Message-Id: <3F4899B6-7637-4ED8-95AD-4431DC25A9D4@stevet.net> From: Steve Thomas Subject: Re: [FlyRotary] Re: Exhaust Blowout Date: Mon, 27 Feb 2006 11:04:37 -0800 To: "Rotary motors in aircraft" X-Mailer: Apple Mail (2.746.2) --Apple-Mail-7--448879492 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed On Feb 27, 2006, at 1:02 PM, Richard Sohn wrote: > > ----- Original Message ----- > From: al p wick > To: Rotary motors in aircraft > 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. > > Richard Sohn > N-2071U > Richard, do you have any photos? Best Regards, Steve Thomas SteveT.Net --Apple-Mail-7--448879492 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1
On Feb 27, 2006, = at 1:02 PM, Richard Sohn wrote:

=A0
----- Original = Message -----
Sent: Monday, February 27, 2006 8:23 AM
Subject: [FlyRotary] Re: Exhaust = Blowout

=A0
=A0
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.
=A0

-al= wick
Al,
=A0
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.
=A0

Best Regards,

Steve = Thomas=A0
SteveT.Net



 =

= --Apple-Mail-7--448879492--