Return-Path: Received: from fed1rmmtao09.cox.net ([68.230.241.30] verified) by logan.com (CommuniGate Pro SMTP 4.2b5) with ESMTP id 147429 for flyrotary@lancaironline.net; Thu, 10 Jun 2004 12:21:07 -0400 Received: from BigAl ([68.107.116.221]) by fed1rmmtao09.cox.net (InterMail vM.6.01.03.02 201-2131-111-104-20040324) with ESMTP id <20040610162036.XTF27188.fed1rmmtao09.cox.net@BigAl> for ; Thu, 10 Jun 2004 12:20:36 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Cooling oil Date: Thu, 10 Jun 2004 09:20:46 -0700 Message-ID: <000001c44f06$e2cf96f0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C44ECC.3670BEF0" 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 V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C44ECC.3670BEF0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 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=20 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=20 adequately cool 5 gal/min while the mazda unit can cool 9.5 gal/min. If = 2=20 A/C coolers where used would the two scenarios be equal? Just thinking = out=20 loud any thoughts? Thanks =20 Joe Berki =20 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. =20 Al ------=_NextPart_000_0001_01C44ECC.3670BEF0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

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.

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