X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 10 Jul 2007 11:40:20 -0400 Message-ID: X-Original-Return-Path: Received: from mail8.tpgi.com.au ([203.12.160.46] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTPS id 2168402 for lml@lancaironline.net; Tue, 10 Jul 2007 02:49:17 -0400 Received-SPF: pass receiver=logan.com; client-ip=203.12.160.46; envelope-from=domcrain@tpg.com.au X-TPG-Antivirus: Passed Received: from CRAIN (60-241-193-89.static.tpgi.com.au [60.241.193.89]) by mail8.tpgi.com.au (envelope-from domcrain@tpg.com.au) (8.13.6/8.13.6) with ESMTP id l6A6mP46014087 for ; Tue, 10 Jul 2007 16:48:32 +1000 From: "Dominic V Crain" X-Original-To: "'Lancair Mailing List'" Subject: RE: [LML] Re: TSIO-550 turbine inlet probes X-Original-Date: Tue, 10 Jul 2007 16:47:47 +1000 X-Original-Message-ID: <005d01c7c2be$3cab42e0$0202a8c0@CRAIN> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005E_01C7C312.0E5752E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6822 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 Thread-Index: AcfCjmpsPjzCEdjfRSumpAoHu9ujFQALo7yA Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_005E_01C7C312.0E5752E0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Actually Walter, I am not in a position to do anything. Yessee - I don't have any of the stuff you're talkin' about. I have a lowly O-320 and that's it. But back in the GOD's (that's GOOD OLD DAYS), when rEAL pilots flew = Allison jet power or JT8D's or CFM 56's etc., TIT"S, apart from la femme = fatale's doing cockpit visits, were what you saw going into the turbine, (as in Allisons) and EGT'S were what you saw coming out of the turbine's as in JT8D'S and CFM 56'S. As for the rest of the stuff you mentioned, I've got no idea what you're talkin' about. See - we Aussies are bloody deep - just ask Grayhawk. Cheers Dom =20 Dominic: =20 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). The one further away will read lower. Why? The gas is expanding and cooling as it flows down the pipe. The TIT reading is = higher because the TIT is getting more pulses of exhaust gas per 720 cycle. As = a result it has less time to cool between hot pulses. It READS higher. = It is not actually hotter. You don't really think the gas gets hotter the = further it gets from the exhaust valve, do you? =20 Walter =20 =20 ------=_NextPart_000_005E_01C7C312.0E5752E0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

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

Yessee – I don’t have = any of the stuff you’re talkin’ about.

I have a lowly O-320 and = that’s it.

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

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

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

Cheers

Dom

Dominic:

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). The one further away will read lower. = Why? The gas is expanding and cooling as it flows down the pipe. The TIT = reading is higher because the TIT is getting more pulses of exhaust gas per 720 = cycle. As a result it has less time to cool between hot pulses. It READS higher. It is not actually hotter. You don't really think = the gas gets hotter the further it gets from the exhaust valve, do = you?

Walter=

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