Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b8) with ESMTP id 340004 for flyrotary@lancaironline.net; Fri, 30 Jul 2004 16:06:01 -0400 Received-SPF: error receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from EDWARD (cpe-069-132-183-211.carolina.rr.com [69.132.183.211]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i6UK5SPg017855 for ; Fri, 30 Jul 2004 16:05:29 -0400 (EDT) Message-ID: <002801c47670$911d5590$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Turbo and the EC2 Date: Fri, 30 Jul 2004 16:05:31 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0025_01C4764F.09CB5130" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0025_01C4764F.09CB5130 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageWell, its generally accepted that retarding ignition timing as = boost increases is one way to make certain you don't get into detonation = situation. I guess I would wonder about why the timing between leading = and trailing would be critical. It could be that since with boost you = have higher combustion chamber pressure which supposedly leads to faster = combustion propagation of the wave front - that the split could be a = factor. =20 It could be that with faster combustion wave propagation that you = would want the timing of the lead and trail closer in timing rather than = further or possibly vice versa {:>).=20 . =20 Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: John Slade=20 To: Rotary motors in aircraft=20 Sent: Friday, July 30, 2004 3:11 PM Subject: [FlyRotary] Re: Turbo and the EC2 > From what perspective, John??=20 I'm hearing from Leon that the ignition timing in general, and = specifically the timing split between leading and trailing is CRITICAL = to turbo installations. I "think" Tracy is retarding the ignition with = boost, but I don't know how much. I wish Tracy was back on the list and had time to read it. :( John ------=_NextPart_000_0025_01C4764F.09CB5130 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Well, its generally accepted that = retarding=20 ignition timing as boost increases is one way to make certain you don't = get into=20 detonation situation.  I guess I would wonder about why the timing = between=20 leading and trailing would be critical.  It could be that since = with boost=20 you have higher combustion chamber pressure which supposedly leads to = faster=20 combustion propagation of the wave front - that the split could be a=20 factor. 
 
It could be that   with = faster combustion=20 wave propagation that you would want the timing of the lead and trail = closer in=20 timing rather than further or possibly vice versa = {:>). 
. 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From:=20 John=20 Slade
Sent: Friday, July 30, 2004 = 3:11 PM
Subject: [FlyRotary] Re: Turbo = and the=20 EC2

 > From what perspective, = John?? 
I'm hearing from Leon that the ignition timing in = general, and=20 specifically the timing split between leading and trailing is CRITICAL = to=20 turbo installations.  I "think" = Tracy is=20 retarding the ignition with boost, but I don't know how=20 much.
 
I wish Tracy was back on the list and had = time to=20 read it. :(
John
 
------=_NextPart_000_0025_01C4764F.09CB5130--