X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 10 Nov 2011 13:38:11 -0500 Message-ID: X-Original-Return-Path: Received: from qmta14.westchester.pa.mail.comcast.net ([76.96.59.212] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with ESMTP id 5194885 for lml@lancaironline.net; Thu, 10 Nov 2011 13:37:17 -0500 Received-SPF: pass receiver=logan.com; client-ip=76.96.59.212; envelope-from=jmorgan1023@comcast.net Received: from omta14.westchester.pa.mail.comcast.net ([76.96.62.60]) by qmta14.westchester.pa.mail.comcast.net with comcast id vW9Z1h00D1HzFnQ5EWcig0; Thu, 10 Nov 2011 18:36:42 +0000 Received: from [192.168.1.104] ([68.40.213.193]) by omta14.westchester.pa.mail.comcast.net with comcast id vWch1h00J4AvRc43aWchkP; Thu, 10 Nov 2011 18:36:42 +0000 From: Jack Morgan Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-1--954383382 Subject: OAT X-Original-Date: Thu, 10 Nov 2011 13:36:40 -0500 In-Reply-To: X-Original-To: Lancair Mailing List References: X-Original-Message-Id: <5DBD1FEF-881E-41DB-83D3-6EC65D56DDE3@comcast.net> X-Mailer: Apple Mail (2.1084) --Apple-Mail-1--954383382 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii I located mine on the engine cooling baffle near the cooling inlet = opening. It's accurate with the engine operating and is pretty close = with the aircraft idle in the sun after an overnight cool. The sun will = have some effect regardless of where you put it. Obviously it reads = hotter after engine shut down but I have not found that to be a problem. = On the fast aircraft, impact heating of the airstream raises the reading = if the probe is in the clean airstream. Impact heating is negligible in = the suggested location since the cooling airflow over the engine is at a = much reduced speed. During taxi mine agrees with the automated weather = at the airports. This location avoids most of the drag of the probe for = the purists plus places it out of harms way for ramp/cleaning damage. Jack Morgan > From: GENE CASH > Date: November 10, 2011 12:15:16 PM EST > To: lml@lancaironline.net > Subject: OAT Location >=20 >=20 > For those of you with an AHARS unit used with a glass panel, where are = you locating your OAT probe? I have a Dynon Skyview and it says do not = locate the probe in the sun which rules out the top of the fuselage, in = the vicinity of engine heat which rules out the bottom (exhaust) or = exposed to cabin heat at the rear of the probe which nixes the clever = idea I saw one dude use by mounting the probe in the cabin air NACA = inlet. Now I don't have a clue. Any input appreciated. >=20 > GC > LFG >=20 --Apple-Mail-1--954383382 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii I = located mine on the engine cooling baffle near the cooling inlet = opening. It's accurate with the engine operating and is pretty close = with the aircraft idle in the sun after an overnight cool. The sun will = have some effect regardless of where you put it. Obviously it reads = hotter after engine shut down but I have not found that to be a problem. = On the fast aircraft, impact heating of the airstream raises the reading = if the probe is in the clean airstream. Impact heating is negligible in = the suggested location since the cooling airflow over the engine is at a = much reduced speed. During taxi mine agrees with the automated weather = at the airports. This location avoids most of the drag of the probe for = the purists plus places it out of harms way for ramp/cleaning = damage.

Jack Morgan

From: GENE CASH <genecq2@yahoo.com>
Date: November 10, 2011 = 12:15:16 PM EST
Subject: OAT = Location


For those of you with an AHARS unit = used with a glass panel, where are you locating your OAT probe?  I = have a Dynon Skyview and it says do not locate the probe in the sun = which rules out the top of the fuselage, in the vicinity of engine heat = which rules out the bottom (exhaust) or exposed to cabin heat at the = rear of the probe which nixes the clever idea I saw one dude use by = mounting the probe in the cabin air NACA inlet.  Now I don't have a = clue.  Any input = appreciated.

GC
LFG


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