X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Sender: To: lml Date: Sat, 02 Dec 2006 11:13:23 -0500 Message-ID: X-Original-Return-Path: Received: from secure5.liveoakhosting.com ([64.49.254.21] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTPS id 1632373 for lml@lancaironline.net; Sat, 02 Dec 2006 09:39:40 -0500 Received-SPF: none receiver=logan.com; client-ip=64.49.254.21; envelope-from=walter@advancedpilot.com Received: (qmail 26758 invoked from network); 2 Dec 2006 08:39:17 -0600 Received: from ip12-197-246-235.networkusa.com (HELO ?192.168.1.43?) (12.197.246.235) by rs5.liveoakhosting.com with (AES128-SHA encrypted) SMTP; 2 Dec 2006 08:39:17 -0600 Mime-Version: 1.0 (Apple Message framework v752.3) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-1--67885817 X-Original-Message-Id: From: Walter Atkinson Subject: Re: [LML] Re: New (2006) TSIO550E Lean of Peak (LOP) Operation X-Original-Date: Sat, 2 Dec 2006 08:39:51 -0600 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.752.3) --Apple-Mail-1--67885817 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Peak EGT always occurs at a F:A ratio of about .067... period. The FF at that peak is based on the mass airflow, not the CR of the engine. The higher CR engines are more efficient at turning avgas into HP. Walter On Dec 2, 2006, at 8:22 AM, colyncase on earthlink wrote: The HP multiplier for LOP is based on the BSFC(min). In the engines with 8.5:1 CR it is 14.9. In the 7.5:1 engines it is about 13.7. Walter Walter, do 8.5:1 engines peak at the same, higher, or lower fuel flow? (I think this amounts to asking if the displacment is actually the same, it would be if the crankshaft is the same) If the same, then an 8.5:1 engine has 9% more power at peak. right? Colyn --Apple-Mail-1--67885817 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 Peak EGT always occurs at a F:A = ratio of about .067...=A0 period.=A0 The FF at that peak is based on the = mass airflow, not the CR of the engine.

The higher CR engines are = more efficient at turning avgas into HP.

Walter




On Dec 2, = 2006, at 8:22 AM, colyncase on earthlink wrote:

=A0 The HP multiplier for LOP is = based on the BSFC(min).=A0 In the engines=A0 with
8.5:1 CR it is 14.9.=A0 In the = 7.5:1 engines it is about 13.7.
=A0 =
=A0 = Walter
=A0
=A0


= --Apple-Mail-1--67885817--