Return-Path: Received: from mail.tsisp.com ([65.23.108.44] verified) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP-TLS id 85861 for flyrotary@lancaironline.net; Sun, 23 May 2004 12:41:10 -0400 Received: from stevehome by mail.tsisp.com (Technical Support Inc.) with SMTP id CQA74584 for ; Sun, 23 May 2004 12:41:09 -0400 Reply-To: From: "Steve Brooks" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: water temp sender Date: Sun, 23 May 2004 12:43:35 -0400 Message-ID: <007501c440e5$17e9e730$6400a8c0@WORKGROUP.local> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0076_01C440C3.90D84730" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) 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_0076_01C440C3.90D84730 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Russell Duffy Sent: Sunday, May 23, 2004 11:24 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: water temp sender I now have another question. Since I found out that I'm measuring water temperature twice, and not measuring oil temperature at all, now I have another issue. I getting about a 20 degree difference between the two coolant temps. The way you measured the temps is the way it should be, as long as the water is flowing well. The water leaves the engine at the thermostat housing, so it has picked up all the heat it can from the engine. That will be the hottest point. The water then goes to the radiators, cools off, and comes back to the engine. It then goes through about half the engine to get to the point where the other sensor is located. It should be cooler here, than it will be when it makes it through the other half of the engine to get to the thermostat housing. Ed must have a wacky gauge :-) With a 20 degree difference at the halfway point, the cooling system must be doing a reasonable good job. 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... :-) 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. Steve ------=_NextPart_000_0076_01C440C3.90D84730 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
 
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Russell=20 Duffy
Sent: Sunday, May 23, 2004 11:24 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: water temp=20 sender

I now have another question.  Since I found out = that I'm=20 measuring water temperature twice, and not measuring oil temperature = at all,=20 now I have another issue. I getting about a 20 degree difference = between the=20 two coolant temps.

The way you measured the temps is = the way it=20 should be, as long as the water is flowing well.  The water = leaves the=20 engine at the thermostat housing, so it has picked up all the heat it = can from=20 the engine.  That will be the hottest point.  The = water=20 then goes to the radiators, cools off, and comes back to the = engine.  It=20 then goes through about half the engine to get to the point where the = other=20 sensor is located.  It should be cooler here, than it will = be when=20 it makes it through the other half of the engine to get to the = thermostat=20 housing.  Ed must have a wacky gauge=20 :-)

With a 20 degree difference = at the=20 halfway point, the cooling system must be doing a reasonable good=20 job. 

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 = constant=20 flow of oil past the sensor.   I suspect that measuring = the oil=20 as it returns to the engine was selected as the next logical = point.  I=20 have the pan temp hooked up as an Aux temp on the EM-2, but I can't = say I've=20 looked at it yet.  Maybe when 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

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