Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Thu, 29 May 2003 00:18:14 -0400 Message-ID: X-Original-Return-Path: Received: from [65.54.169.132] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.1b6) with ESMTP id 2366597 for flyrotary@lancaironline.net; Wed, 28 May 2003 19:27:57 -0400 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 28 May 2003 16:27:52 -0700 Received: from 67.243.12.201 by bay3-dav102.bay3.hotmail.com with DAV; Wed, 28 May 2003 23:27:52 +0000 X-Originating-IP: [67.243.12.201] X-Originating-Email: [lors01@msn.com] Reply-To: "Tracy Crook" From: "Tracy Crook" X-Original-To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: oil return location? X-Original-Date: Wed, 28 May 2003 19:24:15 -0400 Organization: Real World Solutions Inc. MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003A_01C3254E.BA03E4C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Original-Message-ID: X-OriginalArrivalTime: 28 May 2003 23:27:52.0298 (UTC) FILETIME=[C24E44A0:01C32570] This is a multi-part message in MIME format. ------=_NextPart_000_003A_01C3254E.BA03E4C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Subject: [FlyRotary] Re: oil return location? 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=20 I have never returned the oil to a point below the oil level so I have = no personal experience with that arrangement. But ---- there have been = around 5 reported cases of oil leaking past redrive oil seals when the = oil return was below the oil level in the pan. Draw your own = conclusions. I would not count on the oil being any less "frothy" from a planetary = redrive than from a turbo. The oil chruning through all those gear = teeth is likely to be pretty well whipped up. If you are looking for a convienient place to return oil, drill & tap = a hole (1/4" NPT) in the "foot" of the flywheel end rotor housing on = the spark plug side. It is at the perfect height, close to the return = from the drive and away from the hot exhaust. Tracy Crook tcrook@rotaryaviation.com www.rotaryaviation.com ------=_NextPart_000_003A_01C3254E.BA03E4C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Subject: [FlyRotary] Re: oil = return=20 location?

Tracy should confirm = this but I=20 think you want your oil return to enter the pan above the oil level in = the=20 pan. Otherwise you risk oil backing up in the redrive. You also risk=20 pressurizing the drive and possibly blowing a seal. I know in turbo = installs=20 this is true and a return line into the pan below oil level is a = definite=20 no-no.

I=92ll let Tracy speak up if he thinks this will be a = problem. I=20 just can=92t see it as an issue with the redrive. It=92s still a = gravity=20 feed, and there isn=92t any pressure. Turbo return is somewhat=20 different. As I understand, they always use those large diameter = pipes,=20 because the oil gets beaten into a frothy foam by the extreme RPM of = the=20 shaft. I have a stock oil return pipe on the way from Mazda, and = it=20 would bolt right on, except that something from the mount will surely = be in=20 the way. I may have to cut the pipe and reconnect it with some=20 hose. We=92ll see. Who knows, something has to fit = eventually=20 :-)

BTW Mike, = I=92ve been=20 thinking about you today since I=92m working on my cowl. Mine is = going to=20 be uuuuuuugly. Van is probably having nightmares now, and = doesn=92t even=20 know why yet :-)

Cheers,

Rusty=20

I have = never returned=20 the oil to a point below the oil level so I have no personal = experience with=20 that arrangement. But ---- there have been around 5 = reported cases=20 of oil leaking past redrive oil seals when the oil return was below = the oil=20 level in the pan. Draw your own conclusions.

I would not = count on=20 the oil being any less "frothy" from a planetary redrive than from a=20 turbo. The oil chruning through all those gear teeth is likely = to be=20 pretty well whipped up.

If you are = looking=20 for a convienient place to return oil, drill & tap a = hole=20 (1/4" NPT) in the "foot" of the flywheel end rotor = housing on=20 the spark plug side. It is at the perfect height, close to = the=20 return from the drive and away from the hot exhaust.

Tracy = Crook
tcrook@rotaryaviation.comwww.rotaryaviation.com<= /FONT>

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