Return-Path: Sender: (Marvin Kaye) To: flyrotary@lancaironline.net Date: Wed, 03 Mar 2004 18:07:56 -0500 Message-ID: X-Original-Return-Path: Received: from wb2-a.mail.utexas.edu ([128.83.126.136] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP-TLS id 3060880 for flyrotary@lancaironline.net; Wed, 03 Mar 2004 10:27:20 -0500 Received: (qmail 55594 invoked from network); 3 Mar 2004 15:27:18 -0000 Received: from dhcp-191-101.per.utexas.edu (HELO benefits3.mail.utexas.edu) (146.6.191.101) by wb2.mail.utexas.edu with RC4-SHA encrypted SMTP; 3 Mar 2004 15:27:18 -0000 X-Original-Message-Id: <5.1.1.5.2.20040303084735.02134b80@localhost> X-Sender: msteitle@mail.utexas.edu@localhost X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 X-Original-Date: Wed, 03 Mar 2004 09:27:13 -0600 X-Original-To: "Rotary motors in aircraft" From: Mark Steitle Subject: Re: [FlyRotary] Re: overflow connections In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed John, Your system varies from mine in that my radiator is set up as a cross- flow, i.e. tanks on left and right. Coolant flows into my radiator at the upper left, and out at the lower right. The bleeder fitting is on the upper right tank. But, for the purpose of removing trapped air in the radiator, I think your system would still benefit from a bleeder circuit going from the upper tank back to the expansion tank. I assume the big line from the bottom of your wp (wp inlet) is connected to the aft/lower tank of the radiator? And the upper wp line (wp outlet) is connected to the fore/upper radiator tank? Without a bleeder circuit, I don't see how air that's trapped in the radiator can escape. If it were me, I would connect the line from the fore/upper rad. tank to the side fitting on the exp. tank. This fitting should be on the other end of the radiator tank from where the large hose connects. And then connect the bottom fitting on the exp. tank to the wp inlet ("T" it in to the wp inlet at the wp). Also install a cap or bleed valve at the thermostat to bleed any air during initial filling. After that, it should not be necessary to open this fitting. Or you can simply remove the upper hose at the thermostat housing when filling the system. The expansion tank needs to be higher than the rest of the cooling system. Mark S. At 09:38 AM 3/3/2004 -0500, you wrote: > > As installed, are the radiator end tanks on left and right, or > > top and bottom? >the tanks are forward and aft. The forward one is about 4 inches higher than >the aft one. > > > And is your return line on the bottom, or top? Consider how air > > will escape, if it ever gets into the radiator. >The lower expansion tank connection is plumbed to the forward rad end tank. >The upper expansion tank connection is plumbed to the top of the engine >block. > >It seems to work. >Should it? :) > >John > > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html