X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 24 Feb 2008 07:45:15 -0500 Message-ID: X-Original-Return-Path: Received: from mta15.adelphia.net ([68.168.78.77] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2754128 for lml@lancaironline.net; Sat, 23 Feb 2008 09:17:46 -0500 Received-SPF: pass receiver=logan.com; client-ip=68.168.78.77; envelope-from=glcasey@adelphia.net Received: from [75.82.216.175] by mta15.adelphia.net (InterMail vM.6.01.05.04 201-2131-123-105-20051025) with ESMTP id <20080223141706.VOHZ4595.mta15.adelphia.net@[75.82.216.175]> for ; Sat, 23 Feb 2008 09:17:06 -0500 Mime-Version: 1.0 (Apple Message framework v753) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-3--16758436 X-Original-Message-Id: From: Gary Casey Subject: Re: Water Cooling in these speed talk days ? X-Original-Date: Sat, 23 Feb 2008 06:17:04 -0800 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.753) --Apple-Mail-3--16758436 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed I talked to the guy that is doing this and looked at his design. I thought it was well designed and a logical approach. The water pump is gear driven and everything is high quality. I feel that the only real advantage is that liquid cooling can allow the compression to be raised somewhat because of the cooler cylinder head surface temperature. And the volumetric efficiency might go up a little because of less inlet air heating. The liquid-cooled cylinders themselves are actually lighter than the air-cooled versions, but adding the other stuff, including the coolant, raised the installed weight, but not by much. In theory the required radiator can cause less drag than the cylinder fins, but you need more air to do the cooling. the cylinder fins of an air-cooled engine are at maybe 350 degrees, while the coolant is limited to around 200-240 to keep a margin below boiling. The bottom line is you need more air, but the restriction to the air flow is less - nominally a break-even proposition. The higher the speed the more the equation goes in favor of liquid cooling. And if you want to add more boost (more power) the cooling is mostly limited by the radiator size, not the cooling of the cylinder itself as is the case with air-cooled cylinders. A liquid cooled TSIO-540 for Reno? TSIO-720? Gary Casey > > Have anyone on the list heard about Lancair with water cooling ? > > http://www.liquidcooledairpower.com > > I guess mentioned system is to heavy, however dosent seems > > like the webpage have been updated for a while. > > > Roger > > www.n360df.com --Apple-Mail-3--16758436 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 I talked to the guy that is doing this and looked at his design. =A0I = thought it was well designed and a logical approach. =A0The water pump = is gear driven and everything is high quality. =A0I feel that the only = real advantage is that liquid cooling can allow the compression to be = raised somewhat because of the cooler cylinder head surface temperature. = =A0And the volumetric efficiency might go up a little because of less = inlet air heating. =A0The liquid-cooled cylinders themselves are = actually lighter than the air-cooled versions, but adding the other = stuff, including the coolant, raised the installed weight, but not by = much. =A0In theory the required radiator can cause less drag than the = cylinder fins, but you need more air to do the cooling. =A0the cylinder = fins of an air-cooled engine are at maybe 350 degrees, while the coolant = is limited to around 200-240 to keep a margin below boiling. =A0The = bottom line is you need more air, but the restriction to the air flow is = less - nominally a break-even proposition. =A0The higher the speed the = more the equation goes in favor of liquid cooling. =A0And if you want to = add more boost (more power) the cooling is mostly limited by the = radiator size, not the cooling of the cylinder itself as is the case = with air-cooled cylinders. =A0A liquid cooled TSIO-540 for Reno? = =A0TSIO-720?

Gary = Casey


Have anyone on the = list heard about Lancair with water cooling ?

http://www.liquidcooledairpow= er.com

I guess mentioned system is to heavy, however dosent = seems

like the webpage have been updated for a while.


Roger

www.n360df.com

= --Apple-Mail-3--16758436--