Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2902402 for flyrotary@lancaironline.net; Tue, 23 Dec 2003 10:12:39 -0500 Received: from rad ([68.212.7.74]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20031223151238.CSCN8082.imf24aec.mail.bellsouth.net@rad> for ; Tue, 23 Dec 2003 10:12:38 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: dual EWP plumbing? Date: Tue, 23 Dec 2003 09:12:34 -0600 Message-ID: <034301c3c967$3549cf70$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0344_01C3C934.EAAF5F70" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0344_01C3C934.EAAF5F70 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable I suspect that with only half the coolant, and only one core, it might = be hard to cool even at cruise. John =20 You may very well be correct, but I won't really know until I try it. I imagine that one pump would be on all the time, and the second would be = on a thermostat of some type, either the Davies Craig controller, or just an on/off type. I am pretty sure that one pump/core would maintain a safe cruise power setting, so once I get beyond the initial climb period, it should provide all the backup I need. =20 =20 While it would be nice to have a true flow rate indicator, I would = settle for a flow switch that just indicates that there is flow of some minimal amount. Has anyone seen such a thing? I'm thinking this would be a = good "pump fail" indicator. =20 =20 Cheers, Rusty =20 ------=_NextPart_000_0344_01C3C934.EAAF5F70 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message

I suspect that with only half the coolant, and only = one core, it=20 might be hard to cool even at cruise. John

 
You may = very well be=20 correct, but I won't really know until I try it.  I imagine that = one pump=20 would be on all the time, and the second would be on a thermostat of = some type,=20 either the Davies Craig controller, or just an on/off type.  I am = pretty=20 sure that one pump/core would maintain a safe cruise power setting, so = once I=20 get beyond the initial climb period, it should provide all the backup I=20 need.  
 
While it = would be nice=20 to have a true flow rate indicator, I would settle for a flow switch = that just=20 indicates that there is flow of some minimal amount.  Has anyone = seen such=20 a thing?  I'm thinking this would be a good "pump fail" = indicator. =20
 
Cheers,
Rusty
 
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