X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 04 Aug 2009 11:37:56 -0400 Message-ID: X-Original-Return-Path: Received: from nschwmtas05p.mx.bigpond.com ([61.9.189.149] verified) by logan.com (CommuniGate Pro SMTP 5.2.15) with ESMTP id 3794320 for lml@lancaironline.net; Tue, 04 Aug 2009 09:31:29 -0400 Received-SPF: pass receiver=logan.com; client-ip=61.9.189.149; envelope-from=frederickmoreno@bigpond.com Received: from nschwotgx02p.mx.bigpond.com ([58.170.138.242]) by nschwmtas05p.mx.bigpond.com with ESMTP id <20090804133049.JUWU1928.nschwmtas05p.mx.bigpond.com@nschwotgx02p.mx.bigpond.com> for ; Tue, 4 Aug 2009 13:30:49 +0000 Received: from Razzle ([58.170.138.242]) by nschwotgx02p.mx.bigpond.com with ESMTP id <20090804133048.UYAU13014.nschwotgx02p.mx.bigpond.com@Razzle> for ; Tue, 4 Aug 2009 13:30:48 +0000 From: "Frederick Moreno" X-Original-To: "Lancair Mail" Subject: FW: [LML] Ice with OAT 36*F (LIVP): Ram Recovery on OAT X-Original-Date: Tue, 4 Aug 2009 21:30:38 +0800 X-Original-Message-ID: <5BB8917465424BDE90387B41251E1D27@Razzle> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00ED_01CA154A.D121D8E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 Thread-Index: AcoT8L6+lFxYdm/LR5eIZMvhE8TsoABFsbZw X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Importance: Normal X-RPD-ScanID: Class unknown; VirusThreatLevel unknown, RefID str=0001.0A150201.4A783809.00BD,ss=1,fgs=0 This is a multi-part message in MIME format. ------=_NextPart_000_00ED_01CA154A.D121D8E0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit doesn't this effect depend on where your probe is? e.g. if it's in the wing root about mid-chord, would you still see this? Yes. It is a frictional aerodynamic heating error, not a compression error, but they are nearly the same. There is no escaping the error. You have to calculate to get the true OAT. Fred ------=_NextPart_000_00ED_01CA154A.D121D8E0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Ice with OAT 36*F (LIVP): Ram Recovery on OAT

 

doesn't this effect depend on where your probe is?

e.g. if it's in the wing root about mid-chord, would you still see this?

 

Yes. 

 

It is a frictional aerodynamic heating error, not a compression error, but they are nearly the same.  There is no escaping= the error.  You have to calculate to get the true  OAT.

 

Fred

 

------=_NextPart_000_00ED_01CA154A.D121D8E0--