X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wproxy.gmail.com ([64.233.184.196] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 990206 for flyrotary@lancaironline.net; Sat, 18 Feb 2006 13:57:12 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.233.184.196; envelope-from=russell.duffy@gmail.com Received: by wproxy.gmail.com with SMTP id 55so357092wri for ; Sat, 18 Feb 2006 10:56:28 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:to:subject:date:message-id:mime-version:content-type:x-priority:x-msmail-priority:x-mailer:importance:in-reply-to:x-mimeole; b=GkuJ6KIN+jqQW5Smh/8J2tofVju5MMQ2zj/bhgXy3HxLkNeItIJeXaYbC4pBhizsgphzcDgNeXa97JVl/I1B9veIY6HskfMZw6+OuZ7zPOd7LMXFhRdxKsdX1t/Q8jqemrF/vsVNe/wZNuGn1pbQXVc9oGLvvzLDu/SojT99wD0= Received: by 10.54.150.19 with SMTP id x19mr2480037wrd; Sat, 18 Feb 2006 10:56:28 -0800 (PST) Return-Path: Received: from rd ( [65.6.194.9]) by mx.gmail.com with ESMTP id 44sm2528816wri.2006.02.18.10.56.28; Sat, 18 Feb 2006 10:56:28 -0800 (PST) From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Another Turbo? Date: Sat, 18 Feb 2006 12:56:28 -0600 Message-ID: <000501c634bd$06a70430$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C6348A.BC0C9430" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C6348A.BC0C9430 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The second turbo sent turbine fragments back into the exhaust port and = took out an apex seal. This cost me a housing, a set of seals and a drive to North Carolina.=20 =20 Hi John, =20 How confident are you in this diagnosis? Did you actually find pieces = of turbine blade imbedded in the housing? Did Bruce says he's seen this = plenty of times before? =20 =20 I've got to admit that I have a hard time believing this could happen. = As Ed said, they're spinning fast, but the energy will be mostly = centrifugal force, with some forward momentum thrown in. When you think of the = angle that the exhaust hits the turbine, it just seems really unlikely this = could happen. =20 =20 I've always wondered if that failure didn't happen just the opposite. = If detonation broke an apex seal, it would go into the turbine. This in = fact happens all the time on the cars. =20 =20 Good luck with your new turbo. =20 =20 Rusty (new kits are soooooo nice) =20 ------=_NextPart_000_0006_01C6348A.BC0C9430 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
The=20 second turbo sent turbine fragments back into the exhaust port and took = out an=20 apex seal.
This cost me a housing, a set of seals and a drive to North = Carolina. 
 
Hi=20 John,
 
How=20 confident are you in this diagnosis?  Did you actually find pieces = of=20 turbine blade imbedded in the housing?  Did Bruce says he's = seen this=20 plenty of times = before?  
 
I've got to=20 admit that I have a hard time believing this could happen.  As = Ed=20 said, they're spinning fast, but the energy will be=20 mostly centrifugal force, with some forward momentum thrown = in.  When=20 you think of the angle that the exhaust hits = the turbine, it just=20 seems really unlikely this could happen. =20
 
I've always=20 wondered if that failure didn't happen just the opposite. =20 If detonation broke an apex seal, it would go into the = turbine.  This=20 in fact happens all the time on the=20 cars.  
 
Good luck=20 with your new = turbo.  
 
Rusty (new=20 kits are soooooo=20 nice)  
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