X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 21 Dec 2009 12:21:15 -0500 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 5.3c4) with ESMTP id 4033795 for lml@lancaironline.net; Mon, 21 Dec 2009 11:51:37 -0500 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=DdpOwgg3jeYpW9cp78Dw4wxMCF4Q0jQsvSANBjlkf+CD/6O5WDCxr/bgOiSISdwR; 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-curtail.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1NMlTL-0006j9-I6 for lml@lancaironline.net; Mon, 21 Dec 2009 11:51:03 -0500 X-Original-Message-ID: <710875B9334E4C319A725A4EE9A10A86@nvidia.com> From: "Colyn Case at earthlink" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: Firewall X-Original-Date: Mon, 21 Dec 2009 11:51:03 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0397_01CA8233.DF4DC7C0" 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: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940b9e11f7f2a0b09b5a01eff99f36fbb12350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 216.57.118.33 This is a multi-part message in MIME format. ------=_NextPart_000_0397_01CA8233.DF4DC7C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I like the specific region approach. early is better. somebody must = make a multi-zone temp head that would work well. I happened to have = an excess edm-700 so that is what I used. (6 probes). it is amazing how = "local" some issues can be, prior to ignition. ....and if you can find = it prior to ignition, that's a good thing. If anyone is interested in the temp sensing tapes, one product is at http://www.mv.com/ipusers/paperthermometer/ I used these to measure temps in the exhaust tunnel after acquiring an = exhaust pipe that guided the exhaust somewhat closer to the fuselage. = they worked well but they only go to 500 dF. Google search found some = other similar products. Maybe they go higher. ----- Original Message -----=20 From: Bill Wade=20 To: lml@lancaironline.net=20 Sent: Monday, December 21, 2009 8:36 AM Subject: [LML] Re: Firewall I agree- finding a suitable temperature range in a specific location = would be difficult with the engine changing temperatures constantly as = loading varied and cooling airflow changed. The outlet would show any = increase no matter what the source. I'm thinking about point sources like exhaust joints or = turbochargers affecting nearby hoses. There are temperature indicating = tapes that could be placed to determine what the normal temperatures = might be. It might be possible to choose a fuse that would blow when the = hose first became exposed rather than allowing failure to create an = alarm at the outlet. -Bill ------=_NextPart_000_0397_01CA8233.DF4DC7C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I like the specific region = approach.  early is=20 better.  somebody must make a multi-zone temp head that would work=20 well.   I happened to have an excess edm-700 so that is what I = used.=20 (6 probes).  it is amazing how "local" some issues can be, prior to = ignition.   ....and if you can find it prior to ignition, = that's a=20 good thing.
 
If anyone is interested in the temp = sensing tapes,=20 one product is at
http://www.mv.com/ip= users/paperthermometer/
 
I used these to measure temps in the = exhaust=20 tunnel  after acquiring an exhaust pipe that guided the exhaust = somewhat=20 closer to the fuselage.  they worked well but they only go to 500=20 dF.   Google search found some other similar = products.  =20 Maybe they go higher.
----- Original Message -----
From:=20 Bill Wade
Sent: Monday, December 21, 2009 = 8:36=20 AM
Subject: [LML] Re: = Firewall

  I agree- finding a suitable = temperature=20 range in a specific location would be difficult with the engine = changing=20 temperatures constantly as loading varied and cooling airflow changed. = The=20 outlet would show any increase no matter what the = source.
 
  I'm thinking about point = sources like=20 exhaust joints or turbochargers affecting nearby hoses. There are = temperature=20 indicating tapes that could be placed to determine what the normal=20 temperatures might be. It might be possible to choose a fuse that = would blow=20 when the hose first became exposed rather than allowing failure to = create an=20 alarm at the outlet.  = -Bill
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