X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 64 [XX] (18%) URL: contains host with port number (18%) SPAMTRICK: obfuscated phone number (18%) SPAMTRICK: obfuscated phone number (18%) SPAMTRICK: obfuscated phone number (-15%) BODY: obfuscated phone number adjustment (-15%) BODY: obfuscated phone number adjustment Return-Path: Received: from fed1rmmtao104.cox.net ([68.230.241.42] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 2016942 for flyrotary@lancaironline.net; Mon, 30 Apr 2007 00:09:31 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.42; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao104.cox.net (InterMail vM.7.05.02.00 201-2174-114-20060621) with ESMTP id <20070430040836.LTZJ24310.fed1rmmtao104.cox.net@fed1rmimpo01.cox.net> for ; Mon, 30 Apr 2007 00:08:36 -0400 Received: from BigAl ([72.192.132.90]) by fed1rmimpo01.cox.net with bizsmtp id tG8c1W0021xAn3c0000000; Mon, 30 Apr 2007 00:08:36 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Cooling Effectiveness Date: Sun, 29 Apr 2007 21:08:34 -0800 Message-ID: <000001c78ae5$9a96b3a0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C78AA2.8C75BD90" 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 V6.00.2900.3028 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C78AA2.8C75BD90 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit If I'm lucky to get on the runway without waiting and start the roll with 180-190F I'm happy camper. But if I have to wait behind few planes, I have to takeoff with 200-210F and very soon at 1000 feet start pulling the power back at 220F. I'm installing misting system like Tracy. Today bought the pump, but have not installed it yet. In my short hours in cruise I see 160F water and 137-140F oil temps. My goal is to do something for the ground an takeoff cooling. Buly CZ MK-IV 13B Cosmo NA Buly; With a pusher, ground cooling is a bit tougher. Although the negative pressure created by the prop would keep my coolant temps down OK when OAT was 60, at higher temps my results were like yours. I installed a SPAL 10" high performance fan on the inside of my rad. http://www.jaycorptech.com/showproduct.aspx?productid=11&categoryid=2 . I can now pretty much taxi and wait at idle indefinitely and keep the coolant at 190F or less. That also keeps the oil temps under about 200F, even though the fan provides no additional air flow for the oil cooler. I typically turn on the fan somewhere during taxi, and turn it off as I'm cleared onto the runway. It alleviated the anxiety of ground operations on a warm day. I also tried a water spray system on the oil cooler for ground operations, but for whatever reason did not find it to be very effective. I think the reason is the fins and tubes are relatively vertical, and the water was not well misted so much of it would run through without evaporating. Al -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_0001_01C78AA2.8C75BD90 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

If I'm lucky to get on the

runway without waiting and start the roll with 180-190F I'm happy =

camper. But if I have to wait behind few planes, I have to takeoff =

with 200-210F and very soon at 1000 feet start pulling the power back =

at 220F. I'm installing misting system like Tracy. Today = bought the

pump, but have not installed it yet.

In my short hours in cruise I see 160F water and 137-140F oil temps. =

My goal is to do something for the ground an takeoff = cooling.

Buly

CZ MK-IV 13B Cosmo NA

Buly;

With a pusher, = ground cooling is a bit tougher. Although the negative pressure created = by the prop would keep my coolant temps down OK when OAT was 60, at higher = temps my results were like yours. I installed a SPAL 10” high = performance fan on the inside of my rad. http://www.jaycorptech.com/showproduct.aspx?productid= =3D11&categoryid=3D2 .

I can now = pretty much taxi and wait at idle indefinitely and keep the coolant at 190F or less. = That also keeps the oil temps under about 200F, even though the fan provides = no additional air flow for the oil cooler. I typically turn on the = fan somewhere during taxi, and turn it off as I’m cleared onto the = runway. It alleviated the anxiety of ground operations on a warm = day.

I also tried a = water spray system on the oil cooler for ground operations, but for whatever = reason did not find it to be very effective. I think the reason is the = fins and tubes are relatively vertical, and the water was not well misted so much = of it would run through without evaporating.

Al

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