Return-Path: Sender: (Marvin Kaye) To: flyrotary@lancaironline.net Date: Tue, 23 Mar 2004 21:29:56 -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 3115308 for flyrotary@lancaironline.net; Tue, 23 Mar 2004 10:46:24 -0500 Received: (qmail 10836 invoked from network); 23 Mar 2004 15:46:20 -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; 23 Mar 2004 15:46:20 -0000 X-Original-Message-Id: <5.1.1.5.2.20040323093645.0118cb70@localhost> X-Sender: msteitle@mail.utexas.edu@localhost X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 X-Original-Date: Tue, 23 Mar 2004 09:46:15 -0600 X-Original-To: "Rotary motors in aircraft" From: Mark Steitle Subject: Re: [FlyRotary] Cap for pressurized system In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed David, While my a/c hasn't flown, I do have 5 hours of ground time on my n/a 20B. I just finished wiring my EM-2 last weekend and powered it up for the first time. The EM-2 tells me that my cooling system maintains 27 psi at the exit of the block. My system is designed with a single purge tank and one 25# radiator cap on the purge tank. It also has an overflow bottle without any pressure cap to catch any burbles. After about a 30 min.run on Sunday, I noticed that it purged some air and sucked in about a cup of coolant from the catch tank. I figure that it will stop doing that once all the air is out of the system. Hope this helps. Mark S. At 09:05 PM 3/22/2004 -0800, you wrote: >Several times on the rotary lists people have mentioned a tiered cooling >system. One in which a primary cap spills over into a pressurized >reservoir. I have been trying to set up such a system except that the >secondary (upper) seal on a radiator cap will not hold any significant >amount of pressure. So the pressurized reservoir only spills coolant >around the primary radiator cap. Does any one know of a cap that will >hold pressure (at least 20 psi) to its reservoir? > >David Leonard >The Rotary Roster: >http://members.aol.com/_ht_a/rotaryroster/index.html > > > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html