X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 15 Dec 2009 16:33:59 -0500 Message-ID: X-Original-Return-Path: Received: from elasmtp-masked.atl.sa.earthlink.net ([209.86.89.68] verified) by logan.com (CommuniGate Pro SMTP 5.3c3) with ESMTP id 4022119 for lml@lancaironline.net; Tue, 15 Dec 2009 13:57:08 -0500 Received-SPF: none receiver=logan.com; client-ip=209.86.89.68; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=sNPkiesARPKyx7cAn9DkI9UtAZyRRrF8e+Pg48UBrg09UmvqFAKtuoGU99iDQoJR; 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 [216.57.118.33] (helo=ccaselt3) by elasmtp-masked.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1NKcZU-0000zX-UD for lml@lancaironline.net; Tue, 15 Dec 2009 13:56:33 -0500 X-Original-Message-ID: From: "Colyn Case at earthlink" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Firewall X-Original-Date: Tue, 15 Dec 2009 13:56:32 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0543_01CA7D8E.687AB260" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940aef5cb147d0e68436e6e7d85029c8748350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 216.57.118.33 This is a multi-part message in MIME format. ------=_NextPart_000_0543_01CA7D8E.687AB260 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable that looks interesting, what does it do if there is heat but not light? = what does it do if you have massive smoke? =20 for now I took an old jpi and put the 6 CHT probes at different places = around the engine compartment. That allows you to baseline it and get a = little info on the source of the problem, which might help assess the = risk or time remaining. Most of these indicate between 150dF and = 180dF. My thought was that these will move above normal range before = anything sparks. Therefore more time.....maybe. As far as the firewall goes, sounds like the blanket is nearly useless = as an insulator and dubious as far as heat rejection goes. Has anyone = researched alternatives that might be better at both? Colyn ----- Original Message -----=20 From: Charlie Kohler=20 To: lml@lancaironline.net=20 Sent: Tuesday, December 15, 2009 1:37 PM Subject: [LML] Firewall In the "for what it's worth column"-- Subject: firewall blanket protection. Several months ago I was removing my exhaust system for top = overhaul/Jet Hot coatings and was particularly interested in my firewall = blanket and several areas of the aluminized coating had come loose and = or off. I started to remove some of it and I discovered that BEHIND a = perfectly normal piece of the blanket I had a blackened/totally charred = 6 inch in diameter piece of pre-preg firewall.=20 My analysis was that during an exhaust crack event well over a year = ago had sprayed exhaust on the firewall blanket from a distance of about = 14 inches and while the blanket had not discolored or gave any = indication of thermal distress--the pre-preg behind it had not fared = well at all.=20 After repairing the pre-preg I repaired the original blanket and put a = 2000=B0 Thermo-Tec blanket on top. I have since tested that = combination-- and I am not too pleased. I would have to say that the blanket protection we have is marginal at = best. While my cracked exhaust event was probably in the neighborhood of = two hours or more exposure-- I sincerely think we need to have a = indication of what is going on in our assessory section. We need to have = a system that is error and false alarm -free. A verification system of = some sort to prevent panic/overreaction.=20 I am currently looking at-- http://www.acroname.com/robotics/parts/R67-UVTRON.html=20 backed up (verified) by a standard outside air temperature gauge = placed in gascolator area. Anyone have a better idea? =20 Charlie K. See me on the web at=20 www.Lancair-IV.com ------=_NextPart_000_0543_01CA7D8E.687AB260 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
that looks interesting,  what does = it do if=20 there is heat but not light?   what does it do if you have = massive=20 smoke?  
 
for now I took an old jpi and put the 6 = CHT probes=20 at different places around the engine compartment.  That allows you = to=20 baseline it and get a little info on the source of the problem, which = might help=20 assess the risk or time remaining.   Most of these indicate = between=20 150dF and 180dF.   My thought was that these will move above = normal=20 range before anything sparks.  Therefore more = time.....maybe.
 
As far as the firewall goes, sounds = like the=20 blanket is nearly useless as an insulator and dubious as far as heat = rejection=20 goes.  Has anyone researched alternatives that might be better at=20 both?
 
Colyn
----- Original Message -----
From:=20 Charlie=20 Kohler
Sent: Tuesday, December 15, = 2009 1:37=20 PM
Subject: [LML] Firewall

In the "for what it's worth column"--

     Subject: firewall blanket protection.

 

Several months ago I was removing my exhaust system for top = overhaul/Jet=20 Hot coatings and was particularly interested in my firewall blanket = and=20 several areas of the aluminized coating had come loose and or off. I = started=20 to remove some of it and I discovered that BEHIND a perfectly normal = piece of=20 the blanket I had a blackened/totally charred 6 inch in diameter piece = of=20 pre-preg firewall.

My analysis was that during an exhaust crack event well over a year = ago had=20 sprayed exhaust on the firewall blanket from a distance of about 14 = inches and=20 while the blanket had not discolored or gave any indication = of=20 thermal distress--the pre-preg behind it had not fared well at all. =

After repairing the pre-preg I repaired the original blanket and = put a=20 2000=B0 Thermo-Tec blanket on top. I have since tested that = combination-- and I=20 am not too pleased.

I would have to say that the blanket protection we have is marginal = at=20 best. While my cracked exhaust event was probably in the neighborhood = of two=20 hours or more exposure-- I sincerely think we need to have a = indication of=20 what is going on in our assessory section. We need to have a system = that is=20 error and false alarm -free. A verification system of some sort to = prevent=20 panic/overreaction.

I am currently looking at--

http://ww= w.acroname.com/robotics/parts/R67-UVTRON.html=20

backed up (verified) by a standard outside air temperature gauge = placed in=20 gascolator area.

 

Anyone have a better idea?


 
Charlie K.
 
See me on the web at
 
------=_NextPart_000_0543_01CA7D8E.687AB260--