X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 04 Jan 2008 19:55:41 -0500 Message-ID: X-Original-Return-Path: Received: from imr-m07.mx.aol.com ([64.12.138.209] verified) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTP id 2630761 for lml@lancaironline.net; Fri, 04 Jan 2008 09:44:16 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.138.209; envelope-from=Sky2high@aol.com Received: from imo-d04.mx.aol.com (imo-d04.mail.aol.com [172.18.150.228]) by imr-m07.mx.aol.com (v107.10) with ESMTP id RELAYIN5-6477e4611136; Fri, 04 Jan 2008 09:43:29 -0500 Received: from Sky2high@aol.com by imo-d04.mx.aol.com (mail_out_v38_r9.3.) id q.ced.257d6843 (65097) for ; Fri, 4 Jan 2008 09:13:16 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Fri, 4 Jan 2008 09:13:16 EST Subject: Re: [LML] Electronic Ignition X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1199455996" X-Mailer: AOL 9.0 VR sub 5006 X-Spam-Flag: NO X-AOL-IP: 172.18.150.228 -------------------------------1199455996 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 1/4/2008 7:33:25 A.M. Central Standard Time, douglasbrunner@earthlink.net writes: I have been thinking a little bit about this issue. I would like to add my 2 cents and see what others (particularly Adkinson and Braly) have to say about this issue. Doug, Go here: _http://cafefoundation.org/v2/research_reports.php_ (http://cafefoundation.org/v2/research_reports.php) and read Ignition Dynamics I, II & III. 20 or 25 Degrees BTDC (depending on compression ratio) provides a reasonable compromise for standard flying at 75% (plus or minus a bit). The timing makes a bigger difference at higher altitudes where NA engines are operating at reduced power enforced by lack of MAP. The EI also makes a big difference in starting and high power operations - like take off. If the PRISM system ever becomes available, it will have an electronic ignition. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Pilot not TSO'd, Certificated score only > 70%. **************Start the year off right. Easy ways to stay in shape. http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489 -------------------------------1199455996 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 1/4/2008 7:33:25 A.M. Central Standard Time,=20 douglasbrunner@earthlink.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

I have been thinking a little bit about this issue. I would lik= e to=20 add my 2 cents

and see what others (particularly Adkinson and Braly) have to sa= y=20 about this issue.

Doug,

Go here:

http://cafefounda= tion.org/v2/research_reports.php

and read Ignition Dynamics I, II & III.

20 or 25 Degrees BTDC (depending on compression ratio) provides&nb= sp;a=20 reasonable compromise for standard flying at 75% (plus or minus a=20 bit). The timing makes a bigger difference at higher altitud= es=20 where NA engines are operating at reduced power enforced by lack of MAP.&nbs= p;=20 The EI also makes a big difference in starting and high power operations - l= ike=20 take off.

If the PRISM system ever becomes available, it will have an electronic=20 ignition.

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

Pil= ot=20 not TSO'd, Certificated score only >=20 70%.

S= tart the year off right. Easy ways to stay=20= in shape in the new year.

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