Return-Path: <13brv3@bellsouth.net> Received: from imf23aec.mail.bellsouth.net ([205.152.59.71] verified) by logan.com (CommuniGate Pro SMTP 4.2b8) with ESMTP id 328196 for flyrotary@lancaironline.net; Tue, 20 Jul 2004 16:54:24 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.71; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf23aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040720205335.IRVK1779.imf23aec.mail.bellsouth.net@rd> for ; Tue, 20 Jul 2004 16:53:35 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: High Temperature Readings Date: Tue, 20 Jul 2004 15:53:45 -0500 Message-ID: <009001c46e9b$a601d260$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0091_01C46E71.BD2BCA60" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_0091_01C46E71.BD2BCA60 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit It seems at the very least that it might be worth checking the resistance between the sensor body to a/c instrument buss ground (not just the engine) to be sure that a poor electrical connection isn't causing higher temp readings. Hi Mark, I agree, particularly if there's any reason to suspect the readings. It's also important to make sure you have a good, purposeful ground from your engine to the airframe, which is probably a lot easier for those of us with aluminum planes. I really like the grounding plates that Electric Bob sells (sold ?). It makes a good common ground point for everything. We worry a bit more about grounding in the MRI world than most folks. The scanners are in RF shielded rooms, and the ground scheme is meticulously followed. The total signal that we receive from a patient is in the neighborhood of a millionth of a volt. In other words, if you stand in one spot too long around my machine, I'll ground your shoes :-) Rusty (FD will likely be gone this weekend) ------=_NextPart_000_0091_01C46E71.BD2BCA60 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
It seems at the very least that it might be worth checking the = resistance=20 between the sensor body to a/c instrument buss ground (not just the = engine) to=20 be sure that a poor electrical connection isn't causing higher temp=20 readings.   
 
Hi=20 Mark,
 
I agree,=20 particularly if there's any reason to suspect the readings.  It's = also=20 important to make sure you have a good, purposeful ground from your=20 engine to the airframe, which is probably a lot easier for those of = us with=20 aluminum planes.  I really like the grounding plates that = Electric Bob=20 sells (sold ?).  It makes a good common ground point for=20 everything.  
 
We worry=20 a bit more about grounding in the MRI world than most folks.  The = scanners=20 are in RF shielded rooms, and the ground scheme is meticulously = followed. =20 The total signal that we receive from a patient is in the neighborhood = of a=20 millionth of a volt.  In other words, if you stand in one spot too = long=20 around my machine, I'll ground your shoes :-)
 
Rusty (FD=20 will likely be gone this=20 weekend)   
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