X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost03.isp.att.net ([204.127.217.103] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTP id 6507133 for flyrotary@lancaironline.net; Tue, 08 Oct 2013 13:46:32 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.103; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-147-248.mco.bellsouth.net[98.85.147.248]) by isp.att.net (frfwmhc03) with SMTP id <20131008174558H0300pnc73e>; Tue, 8 Oct 2013 17:45:59 +0000 X-Originating-IP: [98.85.147.248] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Multiple coollant pressure Caps Date: Tue, 8 Oct 2013 13:45:59 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005D_01CEC42C.B93D4AD0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Ac7EKzwGvJSiiZteT3KMju2tZkHV7AAIhs5Q X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_005D_01CEC42C.B93D4AD0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Jeff, On my radiator, I have a solid cap, no pressure relief. This cap seals at the top of the radiator neck, not down at the bottom where the pressure cap seals. That allows the coolant to rise into the overflow neck. The overflow neck nipple is then plumbed to the bottom of my swirl can and the swirl can has a pressure relief cap on it. I think 21 lbs on the pressure relief cap. This system automatically eliminates air and I periodically check the swirl can to see if I need to add coolant. I only have to add coolant if I have had the system apart for maintenance and introduce air. Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Jeff Whaley Sent: Tuesday, October 08, 2013 9:35 AM To: Rotary motors in aircraft Subject: [FlyRotary] Multiple coollant pressure Caps My original radiator was custom-built and had no filler neck. I bought a new stock radiator that comes with a filler neck and pressure cap. I already have an expansion tank high on the firewall with a filler neck and pressure cap. The radiator will be mounted under the engine. In this scenario is it acceptable to have 2 pressure caps? I don't really want the second cap and am considering getting it welded shut - but do I have to? If the lower-mounted pressure cap has the highest pressure rating I'm thinking it should be okay. Has anyone tried this? Jeff This message, and the documents attached hereto, is intended only for the addressee and may contain privileged or confidential information. Any unauthorized disclosure is strictly prohibited. If you have received this message in error, please notify us immediately so that we may correct our internal records. Please then delete the original message. Thank you. ------=_NextPart_000_005D_01CEC42C.B93D4AD0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Jeff,

On my radiator, I have a solid cap, = no pressure relief.  This cap seals at the top of the radiator neck, = not down at the bottom where the pressure cap seals.  That allows the = coolant to rise into the overflow neck.  The overflow neck nipple is then plumbed = to the bottom of my swirl can and the swirl can has a pressure relief cap on = it.  I think 21 lbs on the pressure relief cap.

 

This system automatically = eliminates air and I periodically check the swirl can to see if I need to add = coolant.  I only have to add coolant if I have had the system apart for maintenance and introduce air.

 

Bill B

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Jeff Whaley
Sent: Tuesday, October = 08, 2013 9:35 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] = Multiple coollant pressure Caps

 

My original radiator was custom-built and had no filler neck.  I = bought a new stock radiator that comes with a filler neck and pressure cap.  I = already have an expansion tank high on the firewall with a filler neck and = pressure cap.  The radiator will be mounted under the engine.  In this scenario is it acceptable to have 2 pressure caps?  I don’t = really want the second cap and am considering getting it welded shut - but do I = have to?  If the lower-mounted pressure cap has the highest pressure = rating I’m thinking it should be okay.  Has anyone tried = this?

Jeff

This message, and the documents = attached hereto, is intended only for the addressee and may contain privileged or confidential information. Any unauthorized disclosure is strictly = prohibited. If you have received this message in error, please notify us immediately = so that we may correct our internal records. Please then delete the = original message. Thank you.

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