X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 05 May 2010 21:24:28 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-curtail.atl.sa.earthlink.net ([209.86.89.64] verified) by logan.com (CommuniGate Pro SMTP 5.3.6) with ESMTP id 4247643 for lml@lancaironline.net; Tue, 04 May 2010 16:41:27 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.64; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=QweL3wdhCqCx8aKttTZk3s1MXZrvrCaMQQ4z29ezj9q5UYy8jA9pS9tv7oc64pIY; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [216.57.118.166] (helo=[192.168.1.101]) by elasmtp-curtail.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1O9OvC-0000K8-Ie for lml@lancaironline.net; Tue, 04 May 2010 16:40:51 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1078) Content-Type: multipart/alternative; boundary=Apple-Mail-96-493189400 Subject: Re: [LML] Re: Cabin Door Window-IV-P X-Original-Date: Tue, 4 May 2010 16:40:49 -0400 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <07D18EA3-DCB8-40DB-A18D-95C1013921B7@earthlink.net> X-Mailer: Apple Mail (2.1078) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da94085415ffd18e5fd717b71067d0a41ce99350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 216.57.118.166 --Apple-Mail-96-493189400 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 My noise didn't sound like it was coming from the engine. more like = something banging on the fuselage. Just happened 2 or 3 times and then = stopped. I had done some carbon work since the last flight so possibly = it was some bubbles popping but it seemed loud for that. My engine is set up for 45 gph in the climb. On May 4, 2010, at 4:23 PM, Robert Pastusek wrote: > Colyn, > =20 > On the loud banging/popping, could the engine be pre-igniting? This = will definitely cause what you describe, and is definitely not good on = it. Do you climb at full rich mixture? If so, pre-ignition is not = likely=85but possible. If you are leaning in the climb, try pushing in = the mixture the next time it happens to see if that corrects it. Also, = you can get a pop/bang from =93after-fire=94 in descent with the mixture = rich. This is caused by unburned fuel being dumped into the exhaust = during descent when the engine is essentially windmilling=85not = producing much power=85 The fuel mixture will occasionally ignite in the = exhaust stack causing a definite pop/bang. > =20 > You=92ve got the old window for asking. I don=92t have it out = yet=85probably be June as my =93real work=94 is significantly = interfering with my fun these days, but I intend to try to get it out in = one piece so I can try to see where the break started, and why. > =20 > According to Ed, the crankshaft failed between the bearing journal and = the prop flange=85right in the radius. Ed says you can see a crack = through at least half the material, then the rest =93tore off=94, = bending/distorting the metal in the process. Don=92t know if this was = one of the =93bad=94 Continental cranks that got through the check of a = few years ago or not. The NTSB has the engine and is analyzing now. = Expect to hear more about this when available. > =20 > Bob > =20 > =20 > From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of = Colyn Case > Sent: Monday, May 03, 2010 6:40 PM > To: lml@lancaironline.net > Subject: [LML] Re: Cabin Door Window-IV-P --Apple-Mail-96-493189400 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 My noise didn't sound like it was coming from the = engine.  more like something banging on the fuselage.   Just = happened 2 or 3 times and then stopped.   I had done some carbon = work since the last flight so possibly it was some bubbles popping but = it seemed loud for that.

My engine is set up for 45 = gph in the climb.

On May 4, 2010, at 4:23 PM, = Robert Pastusek wrote:

On = the loud banging/popping, could the engine be pre-igniting? This will = definitely cause what you describe, and is definitely not good on it. Do = you climb at full rich mixture? If so, pre-ignition is not likely=85but = possible. If you are leaning in the climb, try pushing in the mixture = the next time it happens to see if that corrects it. Also, you can get a = pop/bang from =93after-fire=94 in descent with the mixture rich. This is = caused by unburned fuel being dumped into the exhaust during descent = when the engine is essentially windmilling=85not producing much power=85 = The fuel mixture will occasionally ignite in the exhaust stack causing a = definite pop/bang.
 Lancair = Mailing List [mailto:lml@lancaironline.net] On Behalf Of Colyn = Case
Sent: Monday, May 03, 2010 6:40 = PM
To: lml@lancaironline.net
Subj= ect: [LML] Re: = Cabin Door = Window-IV-P

= --Apple-Mail-96-493189400--