X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [66.219.56.248] (HELO qnsi-xch.qnsi.net) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1000455 for flyrotary@lancaironline.net; Mon, 27 Feb 2006 18:19:38 -0500 Received-SPF: none receiver=logan.com; client-ip=66.219.56.248; envelope-from=bhughes@qnsi.net Content-class: urn:content-classes:message Return-Receipt-To: "Bobby J. Hughes" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C63BF4.60F0D8F6" Disposition-Notification-To: "Bobby J. Hughes" X-MimeOLE: Produced By Microsoft Exchange V6.5.6944.0 Subject: RE: [FlyRotary] Re: Exhaust Blowout Date: Mon, 27 Feb 2006 17:20:20 -0600 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: Exhaust Blowout Thread-Index: AcY786qPAZ4r5tpSRTCA6DL9MlOeJgAAExSQ From: "Bobby J. Hughes" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C63BF4.60F0D8F6 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Richard, =20 Driving down the road observing mufflers. (got to get a life) I have noticed some cars with two small pipe exiting the muffler. I wonder what effect this would have on sound and rpm's verses one small pipe or one large pipe? =20 Bobby ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Richard Sohn Sent: Monday, February 27, 2006 7:18 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Exhaust Blowout =20 ----- Original Message -----=20 From: Steve Thomas =20 To: Rotary motors in aircraft =20 Sent: Monday, February 27, 2006 11:04 AM Subject: [FlyRotary] Re: Exhaust Blowout On Feb 27, 2006, at 1:02 PM, Richard Sohn wrote: =09 =20 ----- Original Message ----- From: al p wick =20 To: Rotary motors in aircraft =20 Sent: Monday, February 27, 2006 8:23 AM Subject: [FlyRotary] Re: Exhaust Blowout =20 =20 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. =20 -al wick =09 Al, =20 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 =20 Richard, do you have any photos? =09 =09 Best Regards, Steve Thomas=20 SteveT.Net =20 Yes. =20 Richard Sohn N-2071U =20 =20 ------_=_NextPart_001_01C63BF4.60F0D8F6 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Richard,
 
Driving down the road observing mufflers. (got = to get a=20 life) I have noticed some cars with two small pipe exiting the muffler. = I wonder=20 what effect this would have on sound and rpm's verses one small pipe or = one=20 large pipe?
 
Bobby

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Richard=20 Sohn
Sent: Monday, February 27, 2006 7:18 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: Exhaust=20 Blowout

 
----- Original Message -----
From:=20 Steve = Thomas=20
Sent: Monday, February 27, 2006 = 11:04=20 AM
Subject: [FlyRotary] Re: = Exhaust=20 Blowout


On Feb 27, 2006, at 1:02 PM, Richard Sohn wrote:
 
----- Original = Message=20 -----
From:=20 al=20 p wick
Sent:=20 Monday, February 27, 2006 8:23 AM
Subject:=20 [FlyRotary] Re: Exhaust Blowout

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

-al wick
Al,
 
It seems you are = right with=20 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=20 result(regarding noise), also subjective, was amazing, and the = engine lost=20 only 200RPM at the top end.
 
Richard = SohnN-2071U
 
Richard, = do you have=20 any photos?

Best Regards,

Steve Thomas 
SteveT.Net
 
Yes.
 
Richard Sohn
N-2071U
 
 



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