X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp.knology.net ([24.214.63.101] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with SMTP id 1031232 for flyrotary@lancaironline.net; Sun, 12 Mar 2006 00:57:04 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.214.63.101; envelope-from=rv7rotary@knology.net Received: (qmail 6657 invoked by uid 0); 12 Mar 2006 05:50:46 -0000 Received: from unknown (HELO Silver) (24.96.145.214) by smtp5.knology.net with SMTP; 12 Mar 2006 05:50:46 -0000 From: "Chris Sargent" To: "Rotary motors in aircraft" Subject: RE: Duct Flow Separation - the cooling killer Date: Sat, 11 Mar 2006 23:56:10 -0600 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0000_01C64567.5F2B2950" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0000_01C64567.5F2B2950 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Ed Anderson wrote about the NACA study on duct flow losses… One thing that I believe I have learned about ducts and diffusers relative to cooling is summed up in this extract from a NACA study. This was extracted from a Naca study designed to try to make sense of a number of reports (sometimes with conflicting results) on cooling. For those of you interest the report number is; NACA-WR-L-208 which is the redesignation of the original report number War Time Report - Advance Restricted Report L4F26 by John Henry. Good reading in that it attempts to separate the cooling wheat from the chaff. Here’s a link to this study online: http://naca.larc.nasa.gov/digidoc/report/wr/08/NACA-WR-L-208.PDF Here’s a link to other ‘’War Report’’ NACA studies: http://naca.larc.nasa.gov/digidoc/report/wr/ And other NACA reports of all types: http://naca.larc.nasa.gov/digidoc/report/ Chris Sargent ------=_NextPart_000_0000_01C64567.5F2B2950 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Ed Anderson wrote about the NACA study on duct flow = losses…<= /p>

<= /p>

One thing that I believe I have learned about ducts = and diffusers relative to cooling is summed up in this extract from a = NACA study.

This was extracted from a Naca study designed to try = to make sense of a number of reports (sometimes with conflicting results) on = cooling. For those of you interest the report number is; = NACA-WR-L-208 which is the redesignation of the original report number War Time Report = - Advance Restricted Report L4F26 by John Henry. Good reading in = that it attempts to separate the cooling wheat from the = chaff.