Return-Path: Received: from mail.tsisp.com ([65.23.108.44] verified) by logan.com (CommuniGate Pro SMTP 4.2.4) with ESMTP-TLS id 456032 for flyrotary@lancaironline.net; Thu, 07 Oct 2004 07:48:29 -0400 Received-SPF: none receiver=logan.com; client-ip=65.23.108.44; envelope-from=prvt_pilot@yahoo.com Received: from stevehome by mail.tsisp.com (Technical Support Inc.) with SMTP id CQA74584 for ; Thu, 07 Oct 2004 07:47:55 -0400 Reply-To: From: "Steve Brooks" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: #$!%@$ temperatures still high Date: Thu, 7 Oct 2004 07:48:58 -0400 Message-ID: <005201c4ac63$a9cfbc80$6400a8c0@workgroup.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0053_01C4AC42.22BE1C80" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.6604 (9.0.2911.0) In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0053_01C4AC42.22BE1C80 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Re: [FlyRotary] Re: #$!%@$ temperatures still highJoe, I was trying to think of a good way to do this test while in the plane, and outside of a camp stove or something to boil the water, it would be pretty hard to do. I don't think that pulling them to test would be too difficult, plus the sensor resistance goes down as it gets hotter, so any additional resistance in the ground, or the wiring would make the gauge read cooler, not hotter. I think that I'll test it first out of the plane and see what I get, I can also measure the resistance at boiling, and then run the plane to the same reading and check the resistance of the sensor there, just to validate the readings. Steve -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Joe Hull Sent: Wednesday, October 06, 2004 7:48 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: #$!%@$ temperatures still high On 10/6/04 6:46 PM, "Steve Brooks" wrote: Mark, You raise a good point. I'm pretty confident in the oil side of the equation. The digital readout is aircraft certified, and the specs are +- 1/2 degree. The sender is also aircraft type. The water temp is automotive. Its anyone's guess how accurate it is. The sensors aren't real expensive, so I may just order another one, and see what I get. The engine doesn't seem to be really hot when I land, which also makes me wonder about the accuracy. With that said, I also think that my air flow through the oil cooler is a little on the low side. I don't want to rob any more form the coolant side, so another scoop seems to be the answer. Steve Steve, can't you put the sender in boiling water and see what do you read? Many gauges have adjustments on the back and you can compensate if the reading is off. bulent Steve - Make sure you do this (hot water test) while the sender and gauge are attached in the plane. If there is a "ground loop" problem (i.e. significant difference in resistance between sender to ground and gauge to ground) you might be getting an error that way too. If you test them out of the plane they may check out OK but in the plane they may have this additional error. Just a thot! Joe Hull ------=_NextPart_000_0053_01C4AC42.22BE1C80 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] Re: #$!%@$ temperatures still high
Joe,
I was=20 trying to think of a good way to do this test while in the plane, and = outside of=20 a camp stove or something to boil the water, it would be pretty hard to=20 do.  I don't think that pulling them to test would be too = difficult, plus=20 the sensor resistance goes down as it gets hotter, so any additional = resistance=20 in the ground, or the wiring would make the gauge read cooler, not=20 hotter.
 
I=20 think that I'll test it first out of the plane and see what I get, I can = also=20 measure the resistance at boiling, and then run the plane to the same = reading=20 and check the resistance of the sensor there, just to validate the=20 readings.
 
Steve
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Joe=20 Hull
Sent: Wednesday, October 06, 2004 7:48 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: #$!%@$ = temperatures=20 still high

On 10/6/04 6:46 PM, = "Steve=20 Brooks" <prvt_pilot@yahoo.com> wrote:

Mark,
You raise=20 a good point.  I'm pretty confident in the oil side of the = equation.=20  The digital readout is aircraft certified, and the specs are +- = 1/2=20 degree.  The sender is also aircraft type.  The water temp = is=20 automotive.  Its anyone's guess how accurate it is.  The = sensors=20 aren't real expensive, so I may just order another one, and see what I = get.
The engine doesn't seem to be really hot when I land, which = also makes=20 me wonder about the accuracy.

With that = said, I=20 also think that my air flow through the oil cooler is a little on the = low=20 side.  I don't want to rob any more form the coolant side, so = another=20 scoop seems to be the answer.

Steve


Steve, = can’t you put the=20 sender in boiling water and see what do you read? Many gauges have = adjustments=20 on the back and you can compensate if the reading is=20 off.
bulent

 

Steve=20 –

Make sure = you do this=20 (hot water test) while the sender and gauge are attached in the plane. = If=20 there is a “ground loop” problem (i.e. significant = difference in resistance=20 between sender to ground and gauge to ground) you might be getting an = error=20 that way too. If you test them out of the plane they may check out OK = but in=20 the plane they may have this additional error.

 

Just a=20 thot!

Joe=20 Hull

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