Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Mon, 19 May 2003 19:37:07 -0400 Message-ID: X-Original-Return-Path: Received: from BAY0-SMTP06.adinternal.hotmail.com ([65.54.241.113] verified) by logan.com (CommuniGate Pro SMTP 4.1b6) with ESMTP id 2354740 for flyrotary@lancaironline.net; Mon, 19 May 2003 12:19:56 -0400 X-Originating-IP: [68.7.218.110] X-Originating-Email: [alventures@msn.com] Received: from BigAl ([68.7.218.110]) by BAY0-SMTP06.adinternal.hotmail.com with Microsoft SMTPSVC(5.0.2195.5600); Mon, 19 May 2003 09:19:55 -0700 Reply-To: From: "Al Gietzen" X-Original-To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: coolant / thermostat X-Original-Date: Mon, 19 May 2003 09:19:52 -0700 Organization: ALVentures X-Original-Message-ID: <000001c31e22$7d66db40$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4024 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Original-Return-Path: alventures@email.msn.com X-OriginalArrivalTime: 19 May 2003 16:19:55.0515 (UTC) FILETIME=[7C085CB0:01C31E22] Posted for "Marko Bewersdorff" : >How about a ball valve - those with zero flow restriction? You could put one in line and manually control flow - maybe a remote lever of some sorts - that would be like a cowl flap basically. hmm, I sound too theoretical - for the record, I currently have no cooling problems - the engine is still sitting near the plane on an oil drum, just need to get started on the engine mount... A ball valve could work fine as an in-line control if it is the line to one of two radiators. In the main line out of the pump; probably not. As noted in other postings, the Mazda thermostat closes the internal recirculation loop when it opens to the external loop. With the thermostat removed and the bypass plugged, throttling downstream with a valve could cause serious hotspots in the engine. Al