X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [65.54.250.77] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 5.0.3) with ESMTP id 860442 for flyrotary@lancaironline.net; Fri, 02 Dec 2005 11:16:17 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.250.77; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 2 Dec 2005 08:11:43 -0800 Message-ID: Received: from 4.174.6.243 by BAY115-DAV5.phx.gbl with DAV; Fri, 02 Dec 2005 16:11:43 +0000 X-Originating-IP: [4.174.6.243] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: EGT delta Date: Fri, 2 Dec 2005 11:11:40 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00D3_01C5F731.2B415FD0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Fri, 2 Dec 2005 11:11:40 -0500 X-OriginalArrivalTime: 02 Dec 2005 16:11:43.0556 (UTC) FILETIME=[16256040:01C5F75B] This is a multi-part message in MIME format. ------=_NextPart_000_00D3_01C5F731.2B415FD0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageGlad to hear that you are flying again Todd. BTW, you are the = one who inspired the new Primer function on the EC2. Can't remember if = yours has it or not. If so, are you using it and how does it work at = low temperatures? I think most of the high EGT delta per inch is due to the flame front, = not actual cooling in the pipe. The mixture will affect the observed = delta and where it occurs a lot. Delta across the turbo is for a = different reason. The energy to compress all that air has to come from = somewhere : ) Tracy (drilling final holes in RV-8 instrument panel) ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Friday, December 02, 2005 8:40 AM Subject: [FlyRotary] Re: Turbo post mortem However I can confirm that there was a very large delta T across = the turbo, and that the temp drop before the turbo is approx. 50F/inch. = I have thermocouples installed at each exhaust port, then another a few = inches further down right at the turbo inlet, then another ~10" after = the turbo outlet (pics are in the archives if interested). I was very = surprised at this temp drop myself so swapped around positions of the = T/C's to confirm the temps. Strange but true.=20 ------=_NextPart_000_00D3_01C5F731.2B415FD0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Glad to hear that you are flying again Todd.  BTW, you are the = one who=20 inspired the new Primer function on the EC2.  Can't remember if = yours has=20 it or not.  If so, are you using it and how does it work at low=20 temperatures?
 
I think most of the high EGT delta per inch is due to the flame = front, not=20 actual cooling in the pipe.  The mixture will affect the observed = delta and=20 where it occurs a lot.    Delta across the turbo is for a = different reason.  The energy to compress all that air has to come = from=20 somewhere : )
 
Tracy (drilling final holes in RV-8 instrument panel)
----- Original Message -----
From: Russell=20 Duffy
To: Rotary motors in = aircraft
Sent: Friday, December 02, 2005 = 8:40=20 AM
Subject: [FlyRotary] Re: Turbo = post=20 mortem

    However I can confirm = that there=20 was a very large delta T across the turbo, and that the temp drop = before the=20 turbo is approx. 50F/inch. I have thermocouples installed at each = exhaust=20 port, then another a few inches further down right at the turbo inlet, = then=20 another ~10" after the turbo outlet (pics are in the archives if = interested).=20 I was very surprised at this temp drop myself so swapped around = positions=20 of the T/C's to confirm the temps.
    Strange but true. 
 
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