X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao08.cox.net ([68.230.241.31] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1094465 for flyrotary@lancaironline.net; Sat, 06 May 2006 10:38:49 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.31; envelope-from=ALVentures@cox.net Received: from BigAl ([72.192.132.90]) by fed1rmmtao08.cox.net (InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP id <20060506143803.NZDF27967.fed1rmmtao08.cox.net@BigAl> for ; Sat, 6 May 2006 10:38:03 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: oil cooler lines Date: Sat, 6 May 2006 07:38:19 -0700 Message-ID: <000501c6711a$b84006d0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C670E0.0BE12ED0" 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 V6.00.2900.2869 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C670E0.0BE12ED0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Plumbing in parallel will have lower pressure drop; and likely some advantage in heat rejection because of higher average rejection temp. =20 =20 Rotary engines have a high oil flow. Twelve ft of -8 line and two = coolers in series could have quite a high pressure drop starting up on a cold morning. But once things are warmed up, should be OK. Personally, I'd = opt for at least -10 line. =20 FWIW, =20 Al =20 -------------- Original message --------------=20 From: BMears9413@aol.com=20 I'm running two oil coolers in the Spitfire. Due to the lengthe of the = lines and volume of the two coolers I reduced my oil lines to AN8 (I think = stock they were 10?) Now, before I close everything up I'm having second = guessing. My total line length will be around 12'. I had planned on running the = lines to one oil cooler, then the other, then back to the motor. Any comments? =20 Bob Mears ------=_NextPart_000_0006_01C670E0.0BE12ED0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Plumbing in parallel will have lower pressure drop; and likely some advantage in = heat rejection because of higher average rejection temp. =  

 

Rotary engines have a high oil flow.  Twelve ft of -8 line and two coolers in series could have = quite a high pressure drop starting up on a cold morning.  But once things = are warmed up, should be OK.  Personally, I’d opt for at least = -10 line.

 

FWIW,

 

Al

 

-------------- Original message = --------------
From: BMears9413@aol.com

I'm running two oil coolers in the Spitfire. = Due to the lengthe of the lines and volume of the two coolers I reduced my oil = lines to AN8 (I think stock they were 10?) Now, before I close everything up = I'm having second guessing. My total line length will be around 12'. I had = planned on running the lines to one oil cooler, then the other, then back to the = motor.

Any comments?

 

Bob Mears

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