Return-Path: Received: from a34-mta02.direcway.com ([66.82.4.91] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 568953 for flyrotary@lancaironline.net; Wed, 15 Dec 2004 16:04:47 -0500 Received-SPF: none receiver=logan.com; client-ip=66.82.4.91; envelope-from=jackbeale@direcpc.com Received: from jack (dpc691916001.direcpc.com [69.19.16.1]) by a34-mta02.direcway.com (iPlanet Messaging Server 5.2 HotFix 1.25 (built Mar 3 2004)) with SMTP id <0I8S0079A7USWZ@a34-mta02.direcway.com> for flyrotary@lancaironline.net; Wed, 15 Dec 2004 16:04:16 -0500 (EST) Date: Wed, 15 Dec 2004 16:02:48 -0500 From: Jack Beale Subject: Re: [FlyRotary] Re: [FlyRotary]Oil Cooling/Pumping To: Rotary motors in aircraft Message-id: <007f01c4e2e9$a13997a0$2619050a@jack> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Mailer: Microsoft Outlook Express 6.00.2600.0000 Content-type: multipart/alternative; boundary="Boundary_(ID_/wQRc3+DDEJabxbR1p+7zA)" X-Priority: 3 X-MSMail-priority: Normal References: This is a multi-part message in MIME format. --Boundary_(ID_/wQRc3+DDEJabxbR1p+7zA) Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 7BIT A, I was thinking two things: 1. simply reduce the pressure with a regulator; and 2. reduce the pressure and bypass the cooler with some of the flow. I really don't know how much oil must pass through the cooler for sufficient cooling - may be a trial-and-error thing. At the very least the cooler wouldn't be over-pressurized and fail, causing loss of all the oil. I suspect that the regulator could be adjusted to provide adequate flow at a pressure well within the limits of the cooler. Given the correct formula and inputs, someone could calculate a ballpark figure. Testing would be the only way to prove it for sure. Jack Beale jack.beale@att.net -------------------------------------------------------------------------------- ----- Original Message ----- From: Al Gietzen To: Rotary motors in aircraft Sent: Wednesday, December 15, 2004 1:13 PM Subject: [FlyRotary] Re: [FlyRotary]Oil Cooling/Pumping If an overpressure in the oil cooler is causing the cooler to burst... Why not limit the pressure by adding a pressure regulator in series with the cooling system....? I guess you mean to bypass the cooler with some of the flow to limit pressure to the cooler? Probably not a good idea - reduces your ability to cool the oil. Al --Boundary_(ID_/wQRc3+DDEJabxbR1p+7zA) Content-type: text/html; charset=iso-8859-1 Content-transfer-encoding: quoted-printable

I was thinking two things: 1. simply reduce the = pressure=20 with a regulator; and 2. reduce the pressure and bypass the cooler with = some of=20 the flow.

I really don't know how much oil must pass = through the=20 cooler for sufficient cooling - may be a trial-and-error thing. At = the=20 very least the cooler wouldn't be over-pressurized and fail, causing = loss of all=20 the oil.

I suspect that the regulator could be adjusted = to=20 provide adequate flow at a pressure well within the limits of the = cooler.

Given the correct formula and inputs, someone = could=20 calculate a ballpark figure. Testing would be the only way to = prove it for=20 sure.

Jack Beale
jack.beale@att.net

----- Original Message -----=20

From: Al = Gietzen

To: Rotary motors in = aircraft

Sent: Wednesday, December 15, 2004 1:13 PM

Subject: [FlyRotary] Re: [FlyRotary]Oil = Cooling/Pumping

If an = overpressure in=20 the oil cooler is causing the cooler to burst...

Why not = limit the=20 pressure by adding a pressure regulator in series with the=20 cooling system....?

I guess you mean to bypass the = cooler=20 with some of the flow to limit pressure to the cooler? Probably = not a=20 good idea =96 reduces your ability to cool the oil.

--Boundary_(ID_/wQRc3+DDEJabxbR1p+7zA)--