X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 31 Dec 2005 17:02:25 -0500 Message-ID: X-Original-Return-Path: Received: from wind.imbris.com ([216.18.130.7] verified) by logan.com (CommuniGate Pro SMTP 5.0.5) with ESMTPS id 907275 for lml@lancaironline.net; Sat, 31 Dec 2005 12:35:42 -0500 Received-SPF: none receiver=logan.com; client-ip=216.18.130.7; envelope-from=brent@regandesigns.com Received: from [192.168.1.100] (vsat-148-63-101-227.c002.t7.mrt.starband.net [148.63.101.227]) (authenticated bits=0) by wind.imbris.com (8.12.11/8.12.11.S) with ESMTP id jBVHYUDG043435 for ; Sat, 31 Dec 2005 09:34:39 -0800 (PST) (envelope-from brent@regandesigns.com) X-Original-Message-ID: <43B6C11C.4050307@regandesigns.com> X-Original-Date: Sat, 31 Dec 2005 09:34:20 -0800 From: Brent Regan User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 X-Original-To: Lancair Subject: Re: Where has all the power gone? Content-Type: multipart/alternative; boundary="------------090106020701040500010608" This is a multi-part message in MIME format. --------------090106020701040500010608 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Monty Barrett brought an excellent point to my attention that deserves consideration. <<>> Admittedly, I do not know enough about the various EI systems on the market to know if this circumstance has been considered in the design such that the advance is appropriately set at low RPM (for ground operation). It is a question I would want answered when considering using an EI system. Regards Brent Regan --------------090106020701040500010608 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Monty Barrett brought an excellent point to my attention that  deserves consideration.

<<<A big fault of (EI that uses manifold pressure to set timing) is that as soon as the engine starts and the manifold pressure is at a low value, the ignition event occurs earlier and all that is accomplished is that a lot of surface area in the combustion chamber confines is exposed to a lot of heat which is NOT doing any work.  I personally know of some ground overheats that occurred with (EI) because of ATC delays, long taxi's, etc.>>>

Admittedly, I do not know enough about the various EI systems on the market to know if this circumstance has been considered in the design such that the advance is appropriately set at low RPM (for ground operation). It is a question I would want answered when considering using an EI system.

Regards
Brent Regan


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