Return-Path: Received: from imf19aec.mail.bellsouth.net ([205.152.59.67] verified) by logan.com (CommuniGate Pro SMTP 4.2.1) with ESMTP id 409438 for flyrotary@lancaironline.net; Mon, 13 Sep 2004 16:55:39 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.67; envelope-from=sladerj@bellsouth.net Received: from JSLADE ([209.215.55.109]) by imf19aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20040913205508.DGKN6918.imf19aec.mail.bellsouth.net@JSLADE> for ; Mon, 13 Sep 2004 16:55:08 -0400 From: "John Slade" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Limp home mode Date: Mon, 13 Sep 2004 16:55:07 -0400 Message-ID: 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 IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 Importance: Normal In-Reply-To: ============= What I am interested in is the scenario of coolant loss, a computer that only fires, say, every third revolution so that although the engine is producing only partial power, it is also producing minimum heat. Still enough to stay airborne, and able to be cooled with the oil alone. Is this possible? ============= They say a rotary is cooled 1/3 by oil, 2/3 by water, so theoretically you could use 1/3 power and continue flying, but there's probably more to it than this. I expect that some parts are cooled by more by water than oil and vice versa. Certainly you can turn off one set of injectors (or one set of coils) and lower the power use, but you can also lower power use by reducing throttle. The automatic cadillac system sounds like more of a sales gimmick, and for those who don't know how to do this. The rotary is very good at "limping home". It has redundant ignition and fuel injection. I once saw a disassembled engine which "blew" in a drag race, then was driven home 100+ miles. Lose of coolant is something you can prevent with quality hoses and fittings. Perhaps the more likely scenario is water pump failure for which you can add a backup electric water pump. John (Sticking with rev 1)