X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx2.magma.ca ([206.191.0.250] verified) by logan.com (CommuniGate Pro SMTP 4.3.5) with ESMTPS id 1024388 for flyrotary@lancaironline.net; Tue, 28 Jun 2005 00:48:38 -0400 Received-SPF: none receiver=logan.com; client-ip=206.191.0.250; envelope-from=ianddsl@magma.ca Received: from mail2.magma.ca (mail2.magma.ca [206.191.0.214]) by mx2.magma.ca (8.13.0/8.13.0) with ESMTP id j5S4lpQG019449 for ; Tue, 28 Jun 2005 00:47:52 -0400 Received: from binky (ottawa-hs-64-26-156-111.s-ip.magma.ca [64.26.156.111]) by mail2.magma.ca (8.13.0/8.13.0) with SMTP id j5S4ln53002122 for ; Tue, 28 Jun 2005 00:47:52 -0400 Reply-To: From: "Ian Dewhirst" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Engine Rebuild - Coolant Leak Cause Date: Tue, 28 Jun 2005 00:47:43 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0054_01C57B7A.FE9DD3F0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0054_01C57B7A.FE9DD3F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi Ed, one more possible hypothesis... as soon as you start an internal combustion engine the cooland is required to absorb the pressure pulses from the combustion process. Without a vapor cusion to dampen this energy you would have to see something in the guage, the frequency would likely be higher then the response time of the guage so you would not see it as a fluctuating pressure. I think that the pump could generate some pressure, perhaps 4 psi or so, but I think 22 psi is a stretch, the pressure would also have to vary with engine speed. I suppose the easy way to test the pump theory is to remove the belt. Cheers, Ian -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Ed Anderson Sent: Monday, June 27, 2005 10:32 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Engine Rebuild - Coolant Leak Cause Could be, Buly suggested the same thing, George. My coolant pressure pump is after the radiators and before the water pump inlet. So the coolant does have to get through two radiators before my sensor senses the pressure. Ed ------=_NextPart_000_0054_01C57B7A.FE9DD3F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Ed, one more possible=20 hypothesis... as soon as you start an internal combustion = engine the=20 cooland is required to absorb the pressure pulses from the combustion=20 process.  Without a vapor = cusion to=20 dampen this energy you would have to see something in the guage, the = frequency=20 would likely be higher then the response time of the guage so you = would not=20 see it as a fluctuating pressure.  I think that the pump could = generate=20 some pressure, perhaps 4 psi or so, but I think 22 psi is a = stretch, =20 the pressure would also have to vary with engine speed.  I suppose = the easy=20 way to test the pump theory is to remove the belt.
 
Cheers,  Ian
 
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Ed=20 Anderson
Sent: Monday, June 27, 2005 10:32 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: Engine Rebuild - = Coolant=20 Leak Cause

Could be, Buly suggested the same thing, George. 
 
My coolant pressure pump is after the radiators and before the = water pump=20 inlet.  So the coolant does have to get through two radiators = before=20 my  sensor senses the pressure.
 
Ed
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