X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 11 Jul 2007 06:06:00 -0400 Message-ID: X-Original-Return-Path: Received: from ironport5.liveoakmail.com ([216.110.12.21] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2169652 for lml@lancaironline.net; Tue, 10 Jul 2007 15:06:58 -0400 Received-SPF: none receiver=logan.com; client-ip=216.110.12.21; envelope-from=walter@advancedpilot.com X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Ao8CALJ1k0ZAMf4V/2dsb2JhbACCYg X-IronPort-AV: E=Sophos;i="4.16,523,1175490000"; d="scan'208,217";a="21254892" Received: from rs5.liveoakhosting.com (HELO secure5.liveoakhosting.com) ([64.49.254.21]) by ironport5.liveoakmail.com with ESMTP; 10 Jul 2007 14:06:17 -0500 Received: (qmail 13009 invoked from network); 10 Jul 2007 14:06:16 -0500 Received: from ip68-108-233-213.br.br.cox.net (HELO ?10.0.1.2?) (68.108.233.213) by rs5.liveoakhosting.com with (AES128-SHA encrypted) SMTP; 10 Jul 2007 14:06:16 -0500 Mime-Version: 1.0 (Apple Message framework v752.3) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-1--371296121 X-Original-Message-Id: <3457D844-4A98-4D80-B166-9373361C488D@advancedpilot.com> From: Walter Atkinson Subject: Re: [LML] Re: TSIO-550 turbine inlet probes X-Original-Date: Tue, 10 Jul 2007 14:05:33 -0500 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.752.3) --Apple-Mail-1--371296121 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=WINDOWS-1252; delsp=yes; format=flowed Dom: Well, that kinda 'splains things! You oughta join us in Sydney for the APS class this coming October. =20 We'll clear all of this up--and more! Walter On Jul 10, 2007, at 10:40 AM, Dominic V Crain wrote: Actually Walter, I am not in a position to do anything. Yessee =96 I don=92t have any of the stuff you=92re talkin=92 about. I have a lowly O-320 and that=92s it. But back in the GOD=92s (that=92s GOOD OLD DAYS), when rEAL pilots flew =20= Allison jet power or JT8D=92s or CFM 56=92s etc., TIT=94S, apart from la = =20 femme fatale=92s doing cockpit visits, were what you saw going into the =20= turbine, (as in Allisons) and EGT=92S were what you saw coming out of =20= the turbine=92s as in JT8D=92S and CFM 56=92S. As for the rest of the stuff you mentioned, I=92ve got no idea what =20 you=92re talkin=92 about. See =96 we Aussies are bloody deep =96 just ask Grayhawk. Cheers Dom Dominic: Do this. Place a probe 3" from the exhaust flange, then place another =20= one a foot from the exhaust flange (same cylinder with no other =20 exhaust stream joining in). The one further away will read lower. =20 Why? The gas is expanding and cooling as it flows down the pipe. =20 The TIT reading is higher because the TIT is getting more pulses of =20 exhaust gas per 720 cycle. As a result it has less time to cool =20 between hot pulses. It READS higher. It is not actually hotter. =20 You don't really think the gas gets hotter the further it gets from =20 the exhaust valve, do you? Walter --Apple-Mail-1--371296121 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=WINDOWS-1252 Dom:

Well, that kinda 'splains = things!=A0 <g>

You oughta join us in = Sydney for the APS class this coming October.=A0 We'll clear all of this = up--and more!

Walter

On Jul 10, = 2007, at 10:40 AM, Dominic V Crain wrote:

Actually Walter, I am = not in a position to do anything.

Yessee =96 I don=92t have any of the = stuff you=92re talkin=92 about.

I have a lowly O-320 and that=92s = it.

But back in the GOD=92s (that=92s = GOOD OLD DAYS), when rEAL pilots flew Allison jet power or JT8D=92s or = CFM 56=92s etc., TIT=94S, apart from la femme fatale=92s doing cockpit = visits, were what you saw going into the turbine, (as in Allisons) and = EGT=92S were what you saw coming out of the turbine=92s as in JT8D=92S = and CFM 56=92S.

As for the rest of the stuff you = mentioned, I=92ve got no idea what you=92re talkin=92 = about.

See =96 we Aussies are bloody deep =96= just ask Grayhawk.

Cheers

=A0

Do this. Place a probe = 3" from the exhaust flange, then place another one a foot from the = exhaust flange (same cylinder with no other exhaust stream joining in).=A0= The one further away will read lower.=A0 Why?=A0 The gas is expanding = and cooling as it flows down the pipe.=A0 The TIT reading is higher = because the TIT is getting more pulses of exhaust gas per 720 cycle.=A0 = As a result it has less time to cool between hot pulses.=A0 It READS = higher.=A0 It is not actually hotter.=A0 You don't really think the gas = gets hotter the further it gets from the exhaust valve, do = you?

=A0

=A0

= --Apple-Mail-1--371296121--