X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 07 May 2010 06:19:54 -0400 Message-ID: X-Original-Return-Path: Received: from fmailhost05.isp.att.net ([207.115.11.55] verified) by logan.com (CommuniGate Pro SMTP 5.3.6) with ESMTP id 4250701 for lml@lancaironline.net; Thu, 06 May 2010 22:46:20 -0400 Received-SPF: none receiver=logan.com; client-ip=207.115.11.55; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-85-113-131.mco.bellsouth.net[98.85.113.131]) by isp.att.net (frfwmhc05) with SMTP id <20100507024542H0500rr1u4e>; Fri, 7 May 2010 02:45:43 +0000 X-Originating-IP: [98.85.113.131] From: "Bill Bradburry" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Re: Cabin Door Window-IV-P X-Original-Date: Thu, 6 May 2010 22:45:45 -0400 X-Original-Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0000_01CAED6D.DDFE9E30" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcrtYM8PUpNf4igGTX23pDbWrR+6vAALoWlQ X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_0000_01CAED6D.DDFE9E30 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Maybe someone was just trying to get in???? :>) _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of John Hafen Sent: Thursday, May 06, 2010 5:12 PM To: lml@lancaironline.net Subject: [LML] Re: Cabin Door Window-IV-P Are you sure the noise wasn't from dosing off and nodding forward, hitting the top of your headset on the ceiling -- and hearing a "thump" in your headset before waking up again? Happens to me all the time. Found out there's nothing wrong with the plane. John Hafen On May 5, 2010, at 6:24 PM, Colyn Case wrote: 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, 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.but 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 "after-fire" 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.not producing much power. The fuel mixture will occasionally ignite in the exhaust stack causing a definite pop/bang. You've got the old window for asking. I don't have it out yet.probably be June as my "real work" 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. According to Ed, the crankshaft failed between the bearing journal and the prop flange.right in the radius. Ed says you can see a crack through at least half the material, then the rest "tore off", bending/distorting the metal in the process. Don't know if this was one of the "bad" 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. Bob 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 ------=_NextPart_000_0000_01CAED6D.DDFE9E30 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Maybe someone was just trying to = get in????  :>)

 

From: = Lancair Mailing List = [mailto:lml@lancaironline.net] On Behalf Of John Hafen
Sent: Thursday, May 06, = 2010 5:12 PM
To: = lml@lancaironline.net
Subject: [LML] Re: Cabin = Door Window-IV-P

 

Are you sure the noise wasn't from dosing off and nodding = forward, hitting the top of your headset on the ceiling -- and hearing a "thump" in your headset before waking up = again?

 

Happens to me all the time.  Found out there's nothing = wrong with the plane.

 

John Hafen

 

 

On May 5, 2010, at 6:24 PM, Colyn Case = wrote:



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,=

 =

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…but 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 “after-fire” = 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…not = producing much power… The fuel mixture will occasionally ignite in the exhaust = stack causing a definite pop/bang.

 =

You’ve= got the old window for asking. I don’t have it out yet…probably be June = as my “real work” 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.

 =

According = to Ed, the crankshaft failed between the bearing journal and the prop = flange…right in the radius. Ed says you can see a crack through at least half the material, = then the rest “tore off”, bending/distorting the metal in the = process. Don’t know if this was one of the “bad” 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.

 =

Bob

 =

 =

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

 

 

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