X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta03.westchester.pa.mail.comcast.net ([76.96.62.32] verified) by logan.com (CommuniGate Pro SMTP 6.0c3) with ESMTP id 5931338 for flyrotary@lancaironline.net; Mon, 10 Dec 2012 09:25:51 -0500 Received-SPF: none receiver=logan.com; client-ip=76.96.62.32; envelope-from=gordon@acumen-ea.com Received: from omta12.westchester.pa.mail.comcast.net ([76.96.62.44]) by qmta03.westchester.pa.mail.comcast.net with comcast id ZmyC1k0070xGWP853qRGQs; Mon, 10 Dec 2012 14:25:16 +0000 Received: from GordonHPelite ([76.123.51.236]) by omta12.westchester.pa.mail.comcast.net with comcast id ZqRF1k00R55mGuc3YqRFnF; Mon, 10 Dec 2012 14:25:15 +0000 From: "Gordon Alling" To: "'Rotary motors in aircraft'" Subject: What is the value of CHT? Date: Mon, 10 Dec 2012 09:25:13 -0500 Message-ID: <004e01cdd6e2$2b40ea80$81c2bf80$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004F_01CDD6B8.426AE280" X-Mailer: Microsoft Office Outlook 12.0 Content-Language: en-us thread-index: Ac3W4irmVzcayuMeTkuAX3RdSS2hmQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1355149516; bh=ZRInCL0pSvmzy7+AtS1xRltDF6P34plvOaI8uxJ7o14=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=ETBEz6lzyGvo1Ojyg/NktOFl1S8OquGcuNGRvdEWlUCeaZ2e5210IFH9V4ilNSw7h EdSN/9rNXNxB+l00EMlAJlcqayTYChxkUItVKzmOk8wfRykMWM2uFOEbO4T3bWInIf f84BF1rbdkUrOWN5YWLJUWgouvkgqmaEfwyJQdeNum+A/ALzEDaNqv7qhbe6TarJlu febJbznpxWYEeR508EpT08nXo2lh7T6YhhgZTvKukQGJoeTMk87zdSSa5cwVcRSY2p MTb5OKJLPDNGhtLm0Cu6V6+b0CYUFUBQKhQ2xtD9VPacBrYTojH7Xhq7ho+/R1XTBG Nol4f/Gu/9Ugw== This is a multi-part message in MIME format. ------=_NextPart_000_004F_01CDD6B8.426AE280 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I'm thinking about engine monitors and what parameters I need to watch. I'm wondering about the value of cylinder head temperatures in a water-cooled engine. For an air-cooled engine, CHT is valuable as a measure of engine overheat. For the water-cooled rotary, the coolant temp supplies that info. So, what is the additional benefit of monitoring CHTs (in addition to coolant temp). What am I missing? Gordon C. Alling, Jr., PE President acumen Engineering/Analysis, Inc. 540-786-2200 www.acumen-ea.com ------=_NextPart_000_004F_01CDD6B8.426AE280 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I’m thinking about engine monitors and what = parameters I need to watch. = I’m wondering about the value of cylinder head temperatures = in a water-cooled engine. = For an air-cooled engine, CHT is valuable as a measure of engine = overheat. For the = water-cooled rotary, the coolant temp supplies that info. So, what is the additional = benefit of monitoring CHTs (in addition to coolant = temp).

What am I missing?

Gordon C. Alling, Jr., = PE

President

acumen = Engineering/Analysis, = Inc.

540-786-2200

www.acumen-ea.com

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