Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Wed, 28 May 2003 01:38:51 -0400 Message-ID: X-Original-Return-Path: <13brv3@mchsi.com> Received: from sccmmhc01.mchsi.com ([204.127.203.183] verified) by logan.com (CommuniGate Pro SMTP 4.1b6) with ESMTP id 2365518 for flyrotary@lancaironline.net; Wed, 28 May 2003 00:19:19 -0400 Received: from rad (12-218-74-116.client.mchsi.com[12.218.74.116]) by sccmmhc01.mchsi.com (sccmmhc01) with SMTP id <20030528041918mm1004b7ghe>; Wed, 28 May 2003 04:19:18 +0000 Reply-To: <13brv3@mchsi.com> From: <13brv3@mchsi.com> X-Original-To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: oil return location? X-Original-Date: Tue, 27 May 2003 23:19:22 -0500 X-Original-Message-ID: <005401c324d0$50e49120$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0055_01C324A6.680E8920" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0055_01C324A6.680E8920 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Tracy should confirm this but I think you want your oil return to enter = the pan above the oil level in the pan. Otherwise you risk oil backing up in = the redrive. You also risk pressurizing the drive and possibly blowing a = seal. I know in turbo installs this is true and a return line into the pan below = oil level is a definite no-no. =20 I'll let Tracy speak up if he thinks this will be a problem. I just = can't see it as an issue with the redrive. It's still a gravity feed, and = there isn't any pressure. Turbo return is somewhat different. As I = understand, they always use those large diameter pipes, because the oil gets beaten = into a frothy foam by the extreme RPM of the shaft. I have a stock oil = return pipe on the way from Mazda, and it would bolt right on, except that something from the mount will surely be in the way. I may have to cut = the pipe and reconnect it with some hose. We'll see. Who knows, something = has to fit eventually :-) =20 BTW Mike, I've been thinking about you today since I'm working on my = cowl. Mine is going to be uuuuuuugly. Van is probably having nightmares now, = and doesn't even know why yet :-) =20 Cheers, Rusty=20 =20 =20 ------=_NextPart_000_0055_01C324A6.680E8920 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

 Tracy should confirm this but I think you = want your oil return to enter the pan above the oil level in the pan. Otherwise = you risk oil backing up in the redrive. You also risk pressurizing the drive and possibly blowing a seal. I know in turbo installs this is true and a = return line into the pan below oil level is a definite no-no.

 

I’ll let Tracy speak up if he thinks this will be a = problem.  I just can’t see it as an issue with the redrive.  It’s still = a gravity feed, and there isn’t any pressure.  Turbo return is somewhat different.  As I understand, they always use those large = diameter pipes, because the oil gets beaten into a frothy foam by the extreme RPM = of the shaft.  I have a stock oil return pipe on the way from Mazda, and = it would bolt right on, except that something from the mount will surely be in = the way.  I may have to cut the pipe and reconnect it with some = hose.  We’ll see.  Who knows, something has to fit eventually = :-)

 

BTW Mike, I’ve been thinking = about you today since I’m working on my cowl.  Mine is going to be uuuuuuugly.  Van is probably having nightmares now, and = doesn’t even know why yet :-)

 

Cheers,

Rusty

 

 

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