X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao101.cox.net ([68.230.241.45] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTP id 2402602 for flyrotary@lancaironline.net; Tue, 23 Oct 2007 13:41:59 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.45; envelope-from=alventures@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao101.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20071023174118.IXHG1384.fed1rmmtao101.cox.net@fed1rmimpo03.cox.net> for ; Tue, 23 Oct 2007 13:41:18 -0400 Received: from BigAl ([72.192.143.193]) by fed1rmimpo03.cox.net with bizsmtp id 3thE1Y00D4AaN600000000; Tue, 23 Oct 2007 13:41:16 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Cooling Update - Lancair ES/20B Date: Tue, 23 Oct 2007 10:42:51 -0800 Message-ID: <000001c815a4$85a0b1e0$6401a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C81561.777D71E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C81561.777D71E0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 I'm hoping that I will be able to remove the oil/air cooler and block = off that inlet. This should bring the oil temps more in line with the water temps. Also, this would reduce the pressure inside the cowl thereby improving the airflow through the water radiator, and increase the efficiency of the system in the process. We'll see. =20 I may eventually do something similar. One point - before eliminating = your oil/air cooler you may want to get some data on the pressure drop on the = oil side for the oil/water cooler. The Fluidyne coolers I looked at had excessive pressure drop for the full flow oil for the rotary. Those = coolers are designed for piston engines with lower oil flows. Do you know a model number on that cooler? Al (Lots of disruption here because of the fires. My kids and grandkids = have been evacuated from their homes and are staying here. No fire danger = here, but lots of smoke. Not able to get to my airplane at Ramona airport; but have word that it is fine. Friends at Ramona have been evacuated, and = still don't know if their homes are OK.) =20 =20 ------=_NextPart_000_0001_01C81561.777D71E0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

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I'm hoping that I will be able = to remove the oil/air cooler and block off that inlet. This should bring the oil = temps more in line with the water temps. Also, this would reduce the = pressure inside the cowl thereby improving the airflow through the water = radiator, and increase the efficiency of the system in the process. = We'll see.

I may eventually do something similar. One point – before = eliminating your oil/air cooler you may want to get some data on the pressure drop = on the oil side for the oil/water cooler. The Fluidyne coolers I looked = at had excessive pressure drop for the full flow oil for the rotary. = Those coolers are designed for piston engines with lower oil = flows.

Do you know a model number on that cooler?

Al

(Lots of disruption here because of the fires. My kids and grandkids = have been evacuated from their homes and are staying here. No fire danger = here, but lots of smoke. Not able to get to my airplane at Ramona airport; but = have word that it is fine. Friends at Ramona have been evacuated, and still = don’t know if their homes are OK.)

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