X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 07 May 2010 20:47:46 -0400 Message-ID: X-Original-Return-Path: Received: from mail-ww0-f52.google.com ([74.125.82.52] verified) by logan.com (CommuniGate Pro SMTP 5.3.6) with ESMTP id 4251175 for lml@lancaironline.net; Fri, 07 May 2010 10:45:46 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.82.52; envelope-from=carbonflier@gmail.com Received: by wwb34 with SMTP id 34so562970wwb.25 for ; Fri, 07 May 2010 07:45:10 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type; b=VqQKPElQAU2mz0oQ5wYE+OlEEWGWblMy5Iycvv4LjedKgqeFyAkfKjpXvJR32BIJq8 hdQZMp0xKXBrXBOqR2kfVLDCPlnZ2pCEDrjmy+Icig1GZbUG2rFV1Ybnckm/O/dwv67l BDEEAUJlYFaQKD6+s3rFaphqcDCAHA0qy5sj4= Received: by 10.216.86.133 with SMTP id w5mr83858wee.187.1273243510819; Fri, 07 May 2010 07:45:10 -0700 (PDT) X-Original-Return-Path: Received: from [192.168.0.169] (host-98-127-52-164.bln-mt.client.bresnan.net [98.127.52.164]) by mx.google.com with ESMTPS id h1sm1047982wee.19.2010.05.07.07.45.06 (version=TLSv1/SSLv3 cipher=RC4-MD5); Fri, 07 May 2010 07:45:08 -0700 (PDT) X-Original-Message-ID: <4BE42766.6090100@gmail.com> X-Original-Date: Fri, 07 May 2010 08:44:54 -0600 From: David Standish User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 X-Original-To: John Hafen X-Original-CC: lml@lancaironline.net Subject: Re: Re: [LML] Re: Cabin Door Window-IV-P References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------050007060103050708030300" This is a multi-part message in MIME format. --------------050007060103050708030300 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit This might help. http://www.brookstone.com/sl/product/49014-n-a-p-luxe-travel-pillow.html John Hafen wrote: > 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 >> > --------------050007060103050708030300 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit

This might help.
http://www.brookstone.com/sl/product/49014-n-a-p-luxe-travel-pillow.html



John Hafen wrote:
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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