X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 03 Nov 2009 08:21:37 -0500 Message-ID: X-Original-Return-Path: Received: from elasmtp-kukur.atl.sa.earthlink.net ([209.86.89.65] verified) by logan.com (CommuniGate Pro SMTP 5.2.17) with ESMTP id 3913671 for lml@lancaironline.net; Mon, 02 Nov 2009 15:46:20 -0500 Received-SPF: none receiver=logan.com; client-ip=209.86.89.65; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=a/ffTXW4L/qVhXH/RGo70ShW4gOZ/rcbeSg8+hPX710bjKyCMtpmvNy68KWLmWfi; h=Received:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-ELNK-Trace:X-Originating-IP; Received: from [216.57.118.63] (helo=ccaselt3) by elasmtp-kukur.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1N53mb-0001hV-RP for lml@lancaironline.net; Mon, 02 Nov 2009 15:45:46 -0500 X-Original-Message-ID: <075501ca5bfd$724d9120$668c020a@nvidia.com> From: "Colyn Case at earthlink" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: LOP operations with O-360 X-Original-Date: Mon, 2 Nov 2009 15:45:41 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0752_01CA5BD3.8878DDD0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3598 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940df8541040c197561a8b732d6e2038c2a350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 216.57.118.63 This is a multi-part message in MIME format. ------=_NextPart_000_0752_01CA5BD3.8878DDD0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Keith, I wouldn't completely give up on it. at peak is okay if you are = at a low enough power setting. (e.g. like you will be at higher = altitudes) I have a O-360 at 2200 hours now which looks pretty clean on the = borescope. =20 I usually am flying low and am VERY ROP (125 dF) but also have been = running at peak to very slightly LOP when high. In general the CHT's are 30 dF lower when peak to LOP. ----- Original Message -----=20 From: Keith Smith=20 To: lml@lancaironline.net=20 Sent: Monday, November 02, 2009 3:32 PM Subject: [LML] Re: LOP operations with O-360 Colyn, you're right. I was using the CHT as a benchmark for whether I = was LOP or not, but not how far. =20 After trying it again with the lean find mode on the EDM-700, I now = see that the spread is such that I can only get the #4 cyl to 10deg LOP = before the engine gets close to quitting, because #1 and #2 are so much = leaner at that point. So, as it turns out, close, but not cigar. ROP it is, then! Keith ------=_NextPart_000_0752_01CA5BD3.8878DDD0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Keith, I wouldn't completely give up on = it.   at peak is okay if you are at a low enough power = setting. (e.g.=20 like you will be at higher altitudes)
I have a O-360 at 2200 hours now which = looks pretty=20 clean on the borescope.  
I usually am flying low and am VERY ROP = (125 dF)=20 but also have been running at peak to very slightly LOP when=20 high.
In general the CHT's are 30 dF lower = when peak to=20 LOP.
----- Original Message -----
From:=20 Keith=20 Smith
Sent: Monday, November 02, 2009 = 3:32=20 PM
Subject: [LML] Re: LOP = operations with=20 O-360

Colyn, you're right.  I was using the CHT as a = benchmark=20 for whether I was LOP or not, but not how far. 

After = trying it=20 again with the lean find mode on the EDM-700, I now see that the = spread is=20 such that I can only get the #4 cyl to 10deg LOP before the engine = gets close=20 to quitting, because #1 and #2 are so much leaner at that = point.

So, as=20 it turns out, close, but not cigar.  ROP it is,=20 then!

Keith
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