X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Wed, 13 Sep 2006 19:12:10 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d21.mx.aol.com ([205.188.144.207] verified) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTP id 1401847 for lml@lancaironline.net; Wed, 13 Sep 2006 18:08:39 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.207; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d21.mx.aol.com (mail_out_v38_r7.6.) id q.c07.438bca0 (30739) for ; Wed, 13 Sep 2006 18:07:36 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Wed, 13 Sep 2006 18:07:35 EDT Subject: Re: [LML] Re: Backfires LOP X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1158185255" X-Mailer: 9.0 Security Edition for Windows sub 5330 X-Spam-Flag: NO -------------------------------1158185255 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 9/13/2006 4:34:23 P.M. Central Standard Time, walter@advancedpilot.com writes: I experience the same popping in my TSIO550 powered ES-P. A test pilot for Columbia told me that it is very common when running LOP and is aggravated by the low inertia composite prop. The engine has slight variations of fuel mixture and occasionally the fire in a cylinder goes out - leading to the sound. He said if running high power LOP to expect it and get used to it - and it does no harm to the engine. I am unfamiliar with any science that supports that set of notions. I've got to ponder that. 'Tis a puzzlement. Lancair , Walter, et al, Hmmmm, Lean misfire is certainly a possibility. Arcing mags is another. Hey, I have an idea, how about an electronic ignition? At least the spark is there all the time. Check the CAFE tests of electronic ignitions concerning lean misfire (of course one has to be a member of EAA and then poke around). Grayhawk -------------------------------1158185255 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 9/13/2006 4:34:23 P.M. Central Standard Time,=20 walter@advancedpilot.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>I=20 experience the same popping in my TSIO550 powered ES-P.  A test = =20
pilot for Columbia told me that it is very common when running LOP&nbs= p;=20
and is aggravated by the low inertia composite prop.  The engine=20 has 
slight variations of fuel mixture and occasionally the fire=20= in=20 a 
cylinder goes out - leading to the sound.  He said if run= ning=20 high 
power LOP to expect it and get used to it - and it does no=20= harm=20 to 
the engine.


I am unfamiliar with any science that=20 supports that set of notions.  
I've got to ponder that.&nbs= p;=20 'Tis a puzzlement.
Lancair , Walter, et al,
 
Hmmmm, Lean misfire is certainly a possibility.  Arcing mags is=20 another.  Hey, I have an idea, how about an electronic ignition? =20= At=20 least the spark is there all the time.
 
  Check the CAFE tests of electronic ignitions concerning lean mis= fire=20 (of course one has to be a member of EAA and then poke around).
 
Grayhawk
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