X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Thu, 10 Aug 2006 15:46:20 -0400 Message-ID: X-Original-Return-Path: Received: from [68.98.211.24] (HELO systems3.net) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1317100 for lml@lancaironline.net; Thu, 10 Aug 2006 15:11:05 -0400 Received-SPF: none receiver=logan.com; client-ip=68.98.211.24; envelope-from=cberland@systems3.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C6BCB0.9F68080E" Content-class: urn:content-classes:message Subject: [LML] Wing Twist and EI observations X-MimeOLE: Produced By Microsoft Exchange V6.5 X-Original-Date: Thu, 10 Aug 2006 12:10:19 -0700 X-Original-Message-ID: <87C33F695961494D886EB3B6C8A476510B8C0B@s3server.Systems3.local> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] Wing Twist and EI observations Thread-Index: Aca8nfCFXA7d3QvhQgylQ8/mgL69UwAEbx3g From: "Craig Berland" X-Original-To: "Lancair Mailing List" This is a multi-part message in MIME format. ------_=_NextPart_001_01C6BCB0.9F68080E Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Robert M. Simon wrote:=20 The EI readouts are all over the map and do not agree with the RPM and MAP displayed on the Grand Rapids EIS. If the firing angle readout is correct we are at 40 degrees on take off, 32 degrees when cruising ROP but that drops off as we go LOP - and that seems strange. Could anyone enlighten me on this? =20 =20 If you are not turbocharged, the ignition timing should be about 25 deg BTDC on take off. It then should advance a few degrees in cruise and more as you increase your altitude. The timing could/should be significantly advanced in a low power decent. Maybe read as much as 40 deg BTDC depending on the MAP and RPM. Your findings are hopefully bad readings as they are way out of whack. Craig Berland =20 ------_=_NextPart_001_01C6BCB0.9F68080E Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Robert M. = Simon = wrote:

The EI readouts are all = over the map=20 and do not agree with the RPM and MAP displayed on the Grand Rapids = EIS. =20 If the firing angle readout is correct we are at 40 degrees on take off, = 32=20 degrees when cruising ROP but that drops off as we go LOP - and that = seems=20 strange. Could anyone enlighten me on this?

If you are not turbocharged, the ignition timing = should be about 25 deg BTDC on take = off. It then=20 should advance a few degrees in cruise and more as you increase=20 your altitude. The timing could/should be significantly = advanced in a=20 low power decent. Maybe read as much as 40 deg BTDC depending on the MAP = and=20 RPM. Your findings are hopefully bad readings as they are way out = of=20 whack.

Craig Berland

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