Return-Path: Received: from seraph2.grc.nasa.gov ([128.156.10.11] verified) by logan.com (CommuniGate Pro SMTP 4.2b5) with ESMTP id 147451 for flyrotary@lancaironline.net; Thu, 10 Jun 2004 12:39:41 -0400 Received: from lombok-fi.grc.nasa.gov (lombok-fi.grc.nasa.gov [139.88.112.33]) by seraph2.grc.nasa.gov (Postfix) with ESMTP id B20CC689B7 for ; Thu, 10 Jun 2004 12:39:10 -0400 (EDT) Received: from manihi.grc.nasa.gov (manihi.grc.nasa.gov [139.88.112.36]) by lombok-fi.grc.nasa.gov (NASA GRC TCPD 8.12.10/8.12.10) with ESMTP id i5AGdARP025443 for ; Thu, 10 Jun 2004 12:39:10 -0400 (EDT) Received: from GESS20.grc.nasa.gov (gess20.grc.nasa.gov [139.88.63.20]) by manihi.grc.nasa.gov (NASA GRC TCPD 8.12.10/8.12.10) with ESMTP id i5AGd9fZ026949; Thu, 10 Jun 2004 12:39:09 -0400 (EDT) Message-Id: <5.1.0.14.2.20040610123440.0360b118@pop.grc.nasa.gov> X-Sender: scberki@pop.grc.nasa.gov X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Thu, 10 Jun 2004 12:39:09 -0400 To: "Rotary motors in aircraft" , "Rotary motors in aircraft" From: Joseph Berki Subject: Re: [FlyRotary] Re: Cooling oil In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed It would be interesting to measure flow in both engines. I thought that both Lycoming and Mazda engines rejected 2/3 heat load through the oil that is why I started going down this road. If the engines generated the same Hp than the heat load should be similar. Joe Berki At 12:26 PM 6/10/2004 -0400, Mike Robert wrote: >Al Gietzen wrote: > >>I received some preliminary information about oil flow rates in Lycoming >> >>engines which was stated as 5 gal/ min. The other list had a thread where >> >>it was stated that the flow rate of the 13b oil pump was 9.5 gal / min @ >> >>6000 rpm. How would play out in a scenario where an aircraft oil cooler >> >>was used in place of the Mazda unit? It would seem that the AC cooler can >> >>adequately cool 5 gal/min while the mazda unit can cool 9.5 gal/min. If 2 >> >>A/C coolers where used would the two scenarios be equal? Just thinking out >> >>loud any thoughts? Thanks >> >>Joe Berki >> >>Could be, but you really don't know. The flow rate numbers are >>approximate, and the margins designed in may be different. You may be >>better off comparing core volume with a Mazda cooler. For the same HP >>out, I recall that the rotary puts more than twice the heat load into the oil. >> >>Al >That is correct. The rotors are cooled, solely and internally, by the oil. > >>> Homepage: http://www.flyrotary.com/ >>> Archive: http://lancaironline.net/lists/flyrotary/List.html