X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 05 Aug 2009 06:19:05 -0400 Message-ID: X-Original-Return-Path: Received: from smtp2b.orange.fr ([80.12.242.146] verified) by logan.com (CommuniGate Pro SMTP 5.2.15) with ESMTP id 3795369 for lml@lancaironline.net; Wed, 05 Aug 2009 04:37:08 -0400 Received-SPF: none receiver=logan.com; client-ip=80.12.242.146; envelope-from=alainoireaux@free.fr Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf2b19.orange.fr (SMTP Server) with ESMTP id 7C89380000A7 for ; Wed, 5 Aug 2009 10:36:31 +0200 (CEST) Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf2b19.orange.fr (SMTP Server) with ESMTP id 7059C800009F for ; Wed, 5 Aug 2009 10:36:31 +0200 (CEST) Received: from [192.168.1.10] (ARennes-252-1-49-160.w83-195.abo.wanadoo.fr [83.195.122.160]) by mwinf2b19.orange.fr (SMTP Server) with ESMTP id 274E780000A7 for ; Wed, 5 Aug 2009 10:36:31 +0200 (CEST) X-ME-UUID: 20090805083631161.274E780000A7@mwinf2b19.orange.fr X-Original-Message-ID: <4A794472.6020603@free.fr> X-Original-Date: Wed, 05 Aug 2009 10:36:02 +0200 From: Alain NOIREAUX User-Agent: Thunderbird 2.0.0.22 (X11/20090608) MIME-Version: 1.0 X-Original-To: Lancair Mailing List Subject: Re: [LML] Re: Ice with OAT 36*F (LIVP): Ram Recovery on OAT References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------020907010806060009060301" This is a multi-part message in MIME format. --------------020907010806060009060301 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit For my Dynon D10 A , I installed the OAT probe at the rear part inside the Right gear well and it works fine . Alain Noireaux LNC2 F-PSDV > Posted for "Bill" : > > Ice with OAT 36*F (LIVP): Ram Recovery on OATHey Fred, > > Airliners have an OAT probe called a "Rosemont probe". The idea is to > give a > more accurate OAT reading. It's an enclosure around the probe with a > bunch of > little holes in it. Since only a percentage of the air gets through > the holes, > the local velocity inside the "cage" is much less. I guess that the > theory is > that the cage absorbs most of the ram and friction rise leaving the > air inside > the cage at a low relative velocity and at a temp somewhere near true > OAT. > There might be much more to this device that I don't know about (I never > really gave them much thought other than to make sure that it was > "there") but > if this is all it is, do you think that we could construct something > like this > to reduce OAT error? I'd be interested in your thoughts on this. > > Bill Harrelson > N5ZQ 320 1,650 hrs > N6ZQ IV under construction > > > [Discussion about this very thing long ago led many folks to install > their OAT probes in the gear wells.... the gear doors aren't air-tight > and the environment inside the gear well is the same as outside > (except for rain & stuff) for all intents and purposes. Just another > data point. ] > > -- > > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html --------------020907010806060009060301 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit For my Dynon D10 A , I  installed the OAT probe at the rear part inside the Right gear well and it works fine .

Alain Noireaux  LNC2  F-PSDV
Posted for "Bill" <n5zq@verizon.net>:

 Ice with OAT 36*F (LIVP): Ram Recovery on OATHey Fred,
 
 Airliners have an OAT probe called a "Rosemont probe". The idea is to give a
more accurate OAT reading. It's an enclosure around the probe with a bunch of
little holes in it. Since only a percentage of the air gets through the holes,
the local velocity inside the "cage" is much less. I guess that the theory is
that the cage absorbs most of the ram and friction rise leaving the air inside
the cage at a low relative velocity and at a temp somewhere near true OAT.
There might be much more to this device that I don't know about (I never
really gave them much thought other than to make sure that it was "there") but
if this is all it is, do you think that we could construct something like this
to reduce OAT error? I'd be interested in your thoughts on this.
 
 Bill Harrelson
 N5ZQ 320 1,650 hrs
 N6ZQ  IV under construction
 
 
[Discussion about this very thing long ago led many folks to install their OAT probes in the gear wells.... the gear doors aren't air-tight and the environment inside the gear well is the same as outside (except for rain & stuff) for all intents and purposes.  Just another data point.  <M>  ]

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