Return-Path: Received: from [24.25.9.103] (HELO ms-smtp-04-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 85896 for flyrotary@lancaironline.net; Sun, 23 May 2004 13:01:09 -0400 Received: from EDWARD (clt25-78-058.carolina.rr.com [24.25.78.58]) by ms-smtp-04-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i4NH18Vw009679 for ; Sun, 23 May 2004 13:01:09 -0400 (EDT) Message-ID: <004601c440e7$8e6ae650$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: water temp sender Date: Sun, 23 May 2004 13:01:14 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0043_01C440C6.071B52F0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0043_01C440C6.071B52F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message=20 For water, the standard is to measure it as it leaves the engine, = which is the hottest point. I would think that's what you'd want to do = with the oil as well, but unfortunately, there's no practical way to do = that. The oil drips back to the pan from different places, and you = can't measure that return flow directly. You can measure the pan temp, = as I did originally, but it's not the best reading, since there isn't = really a constant flow of oil past the sensor. I suspect that = measuring the oil as it returns to the engine was selected as the next = logical point. I have the pan temp hooked up as an Aux temp on the = EM-2, but I can't say I've looked at it yet. Maybe when Tracy gets = around to that data logging... :-) =20 Someone else said that the remote oil filter was a good place to put = the sensor, so I'm going to check into that this afternoon, and see if = that is possible.=20 Steve Steve, just be aware that the 210F limit referred to is measured = after the oil cooler. So if your filter is after your cooler then you = will be measuring it at the "recommended" point. Not to say you can not = measure it at the filter even if before the cooler, but clearly if it = has not gone through the oil cooler yet, it will be considerably hotter = than 210F. As Rusty mentioned, the oil pan is not the best place to = measure temperature. Ed Anderson ------=_NextPart_000_0043_01C440C6.071B52F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 

For water,=20 the standard is to measure it as it leaves the engine, which is the = hottest=20 point.  I would think that's what you'd want to do with = the oil as=20 well, but unfortunately, there's no practical way to do = that.  The=20 oil drips back to the pan from different places, and you can't = measure=20 that return flow directly.  You can measure the pan temp, as I = did=20 originally, but it's not the best reading, since there isn't really = a=20 constant flow of oil past the sensor.   I suspect = that=20 measuring the oil as it returns to the engine was selected as the = next=20 logical point.  I have the pan temp hooked up as an Aux temp on = the=20 EM-2, but I can't say I've looked at it yet.  Maybe when=20 Tracy gets around to that data logging... :-)
 

Someone else said that the = remote oil=20 filter was a good place to put the sensor, so I'm going to check = into that=20 this afternoon, and see if that is=20 possible. 

 

Steve

 

Steve, just be aware that the 210F limit = referred=20 to is measured after the oil cooler.  So if your filter is = after your=20 cooler then you will be measuring it at the "recommended" = point.  Not=20 to say you can not measure it at the filter even if before the = cooler,=20 but clearly if it has not gone through the oil cooler yet, it will = be=20 considerably hotter than 210F.  As Rusty mentioned, the oil pan = is not=20 the best place to measure=20 temperature.

 

Ed=20 = Anderson

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