Return-Path: Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.2b5) with ESMTP id 147436 for flyrotary@lancaironline.net; Thu, 10 Jun 2004 12:27:35 -0400 Received: from [192.168.1.103] ([68.219.38.107]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040610162659.GWAW19385.imf25aec.mail.bellsouth.net@[192.168.1.103]> for ; Thu, 10 Jun 2004 12:26:59 -0400 Message-ID: <40C88BCE.6060408@bellsouth.net> Date: Thu, 10 Jun 2004 12:26:54 -0400 From: Mike Robert User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040608 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Cooling oil References: In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit 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.