Return-Path: Sender: (Marvin Kaye) To: lml Date: Tue, 14 Jan 2003 21:36:44 -0500 Message-ID: X-Original-Return-Path: Received: from nycsmtp2out.rdc-nyc.rr.com ([24.29.99.223] verified) by logan.com (CommuniGate Pro SMTP 4.0.5) with ESMTP id 1983465 for lml@lancaironline.net; Tue, 14 Jan 2003 21:04:42 -0500 Received: from VAIO (66-108-210-211.nyc.rr.com [66.108.210.211]) by nycsmtp2out.rdc-nyc.rr.com (8.12.1/Road Runner SMTP Server 1.0) with ESMTP id h0F1xVUK006696 for ; Tue, 14 Jan 2003 20:59:38 -0500 (EST) From: "clark baker" X-Original-To: Subject: LNC2 - OAT error X-Original-Date: Tue, 14 Jan 2003 21:04:27 -0500 X-Original-Message-ID: <001d01c2bc3a$729b4a60$d3d26c42@VAIO> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001E_01C2BC10.89C54260" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2605 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 This is a multi-part message in MIME format. ------=_NextPart_000_001E_01C2BC10.89C54260 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit I calibrated the OAT on my Rock Mountain Micro Encoder on the ground. However, I still noticed significant in flight errors, especially in the wintertime. On a recent flight at 19,000, with a reported OAT of -25c, I was indicating -12c. I spoke to Rocky Mountain, I learned that the body (back) side of the probe needs to be either insulated or in an area where the temperature is near the OAT. If it is in a heated area like my installation (ie, in the NACA scoop in my 360), the probe will not be accurate. They suggested that spray on foam insulation of about 1", or relocating the probe to an unheated area would solve the problem. It makes sense, I had just never thought of this possibility before. Regards, Clark Baker N250JF LNC2 360 - 550 hrs tt (and still debugging!) ------=_NextPart_000_001E_01C2BC10.89C54260 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

I calibrated the OAT on my Rock Mountain Micro = Encoder on the ground.  However, I = still noticed significant in flight errors, especially in the wintertime.  On a recent flight at 19,000, = with a reported OAT of -25c, I was indicating = -12c.

 

I spoke to = Rocky = Mountain, I learned that the body = (back) side of the probe needs to be either insulated or in an area where the temperature is near the OAT.  = If it is in a heated area like my installation (ie, in the NACA scoop in my = 360), the probe will not be accurate.  = They suggested that spray on foam insulation of about 1”, or relocating the probe = to an unheated area would solve the problem.  It makes sense, I had just never thought of this possibility = before.

 

Regards,

=

Clark = Baker

N250JF

LNC2 360 – 550 hrs tt (and = still debugging!)

 

 

 

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