X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [199.185.220.224] (HELO priv-edtnes40.telusplanet.net) by logan.com (CommuniGate Pro SMTP 5.0.4) with ESMTP id 883184 for flyrotary@lancaironline.net; Thu, 15 Dec 2005 08:50:20 -0500 Received-SPF: pass receiver=logan.com; client-ip=199.185.220.224; envelope-from=haywire@telus.net Received: from Endurance ([154.20.245.217]) by priv-edtnes40.telusplanet.net (InterMail vM.6.01.04.04 201-2131-118-104-20050224) with SMTP id <20051215134931.PDLW9919.priv-edtnes40.telusplanet.net@Endurance> for ; Thu, 15 Dec 2005 06:49:31 -0700 From: "Todd Bartrim" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Radiator Expansion Tank Date: Thu, 15 Dec 2005 05:49:31 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0033_01C6013B.51BEB9F0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) 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_0033_01C6013B.51BEB9F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Todd Can you explain how using two pressure caps (one 22lb & one 15 lb) add up to a possible total system pressure of 37lbs. I can only see it as a max of 22lbs, Georges B. Hi Georges; The rad caps are differential meaning that they will hold back their rated pressure above the pressure seen at the outlet. So if the the first cap produces a 15 psi increase over atmospheric pressure, then the second cap which has it's outlet plumbed to the 15 psi reservoir will further increase this by it's rated pressure (22 psi in this case) to give a total of 37 psi. At least that's the way I see it. Todd ------=_NextPart_000_0033_01C6013B.51BEB9F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Todd
Can you explain how using two pressure caps (one 22lb & = one 15=20 lb) add up to a possible total system pressure of 37lbs. I can = only see it=20 as a max of 22lbs,
Georges B. 
 
Hi=20 Georges;
    The=20 rad caps are differential meaning that they will hold back their rated = pressure=20 above the pressure seen at the outlet. So if the the first cap produces = a 15 psi=20 increase over atmospheric pressure, then the second cap which has it's = outlet=20 plumbed to the 15 psi reservoir will further increase this by it's rated = pressure (22 psi in this case) to give a total of 37 = psi.
    At=20 least that's the way I see it.
   =20
Todd
 
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