Return-Path: Received: from fed1rmmtao09.cox.net ([68.230.241.30] verified) by logan.com (CommuniGate Pro SMTP 4.2b8) with ESMTP id 321312 for flyrotary@lancaironline.net; Wed, 14 Jul 2004 12:52:56 -0400 Received-SPF: error receiver=logan.com; client-ip=68.230.241.30; envelope-from=ALVentures@cox.net Received: from BigAl ([68.107.116.221]) by fed1rmmtao09.cox.net (InterMail vM.6.01.03.02 201-2131-111-104-20040324) with ESMTP id <20040714165224.VEBN8122.fed1rmmtao09.cox.net@BigAl> for ; Wed, 14 Jul 2004 12:52:24 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: New Scoop Date: Wed, 14 Jul 2004 09:52:45 -0700 Message-ID: <000001c469c2$fcadb170$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C46988.504ED970" 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 V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C46988.504ED970 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Subject: [FlyRotary] Re: New Scoop=20 =20 Kelly, I would tend to agree, but according to information I received from = other on this group, I was told that the common practice was to measure the = coolant at its hottest point, and oil at it's coolest point. =20 =20 It's logical place to measure the coolant at its hottest point since = that is its limiting value. If you have coolant exceeding the boiling point anywhere (except for the nucleate boiling at internal surfaces) you have = a problem. =20 =20 The limiting factor on the oil temp in the rotary is its ability to cool = the rotors/seals, so it's the temp at which it returns to the engine. This limit is generally accepted to be about 220F, but could be exceeded some = for short periods and probably not be a problem. The limit on the oil = itself (breakdown) is higher; considerably higher for synthetics. =20 At least that's my take on it. =20 Al =20 ------=_NextPart_000_0001_01C46988.504ED970 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Subject: [FlyRotary] Re: New Scoop

Kelly,

I = would tend to agree, but according to information I received from other on this group, = I was told that the common practice was to measure the coolant at its hottest = point, and oil at it’s coolest point.

It’s logical place to = measure the coolant at its hottest point since that is its limiting value. If = you have coolant exceeding the boiling point anywhere (except for the = nucleate boiling at internal surfaces) you have a problem. =

The limiting factor on the oil = temp in the rotary is its ability to cool the rotors/seals, so it’s the = temp at which it returns to the engine. This limit is generally accepted = to be about 220F, but could be exceeded some for short periods and probably = not be a problem. The limit on the oil itself (breakdown) is higher; = considerably higher for synthetics.

At least that’s my take on = it.

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