X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp101.plus.mail.re2.yahoo.com ([206.190.53.26] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with SMTP id 999624 for flyrotary@lancaironline.net; Mon, 27 Feb 2006 06:44:46 -0500 Received-SPF: none receiver=logan.com; client-ip=206.190.53.26; envelope-from=prvt_pilot@yahoo.com Received: (qmail 86684 invoked from network); 27 Feb 2006 11:43:50 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Received:Reply-To:From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:In-Reply-To:Importance:X-MimeOLE; b=hXmgq4tjN95HogYQDdQJKssxpJ+8J1tRL4vptqLHnozWu3hK114xDyDZuYbUwcbcs9yj+6L++x0fohNaiav/zvxygo/85jexlQ0T3BX/Nu7O82bUAr/VaNH1Th88tXCcHRqpWQoRx75D1+gr2pdC6cJDJBkxBDRJx/gUX9RR6Mc= ; Received: from unknown (HELO stevehome) (prvt?pilot@71.0.19.116 with login) by smtp101.plus.mail.re2.yahoo.com with SMTP; 27 Feb 2006 11:43:49 -0000 Reply-To: From: "Steve Brooks" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Exhaust Blowout Date: Mon, 27 Feb 2006 06:49:29 -0500 Message-ID: <00aa01c63b94$0dfc6080$0302a8c0@workgroup.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00AB_01C63B6A.252965C0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.6604 (9.0.2911.0) In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1506 This is a multi-part message in MIME format. ------=_NextPart_000_00AB_01C63B6A.252965C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Joe, Sorry to hear about your muffler. Better that it happened on the ground though. Do you have a solution for the problem ? Steve Brooks -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Joe Hull Sent: Monday, February 27, 2006 2:10 AM To: Rotary motors in aircraft Subject: [FlyRotary] Exhaust Blowout I’m still struggling with tuning my rotary/microtech. I spent an hour or so running it yesterday and ended up a little closer on the tuning front but also ended up with a blown out exhaust/muffler. It’s come apart at a bunch of places – not the welds but the Inconel itself next to the welds. The exhaust pipe coming out of the “tangential tube” is/was in the profile of an “8” without the connection in the center. An engineer friend of mine who looked it over said it makes sense - after the fact - that the exhaust pulses were causing the tube to flex at the center joint. It appears to have started at the outboard end and went all the way to the center tube and then, perhaps from vibration, cracked out the pipes except for about ˝” from the center connection. The main manifold – runners and the tangential tube – are all sound with no signs of stress. So, be careful out there! Pics attached. Thanx, Joe Hull Cozy Mk-IV #991 (Done Building! In Phase1 Flight Test - 0 hrs flown) Redmond (Seattle), Washington ------=_NextPart_000_00AB_01C63B6A.252965C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Joe,
Sorry=20 to hear about your muffler.  Better that it happened on the ground=20 though.  Do you have a solution for the problem = ?
 
Steve=20 Brooks
 
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Joe=20 Hull
Sent: Monday, February 27, 2006 2:10 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Exhaust=20 Blowout

I'm still struggling = with tuning=20 my rotary/microtech. I spent an hour or so running it yesterday and = ended up a=20 little closer on the tuning front but also ended up with a blown out=20 exhaust/muffler. It's come apart at a bunch of places - not the welds = but the=20 Inconel itself next to the welds.

 

The exhaust pipe coming = out of the=20 "tangential tube" is/was in the profile of an "8" without the = connection in=20 the center. An engineer friend of mine who looked it over said it = makes sense=20 - after the fact - that the exhaust pulses were causing the tube to = flex at=20 the center joint.  It appears to have started at the outboard end = and=20 went all the way to the center tube and then, perhaps from vibration, = cracked=20 out the pipes except for about =BD" from the center=20 connection.

 

The main manifold - = runners and=20 the tangential tube - are all sound with no signs of=20 stress.

So, be careful out=20 there!

 

Pics=20 attached.

 

Thanx,

Joe=20 Hull

Cozy Mk-IV #991 (Done = Building! In=20 Phase1 Flight Test - 0 hrs flown)

Redmond (Seattle), Washington

------=_NextPart_000_00AB_01C63B6A.252965C0--