Return-Path: Received: from out014.verizon.net ([206.46.170.46] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 384977 for flyrotary@lancaironline.net; Mon, 30 Aug 2004 12:56:33 -0400 Received-SPF: pass receiver=logan.com; client-ip=206.46.170.46; envelope-from=finn.lassen@verizon.net Received: from verizon.net ([4.12.145.173]) by out014.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20040830165604.WKCW24490.out014.verizon.net@verizon.net> for ; Mon, 30 Aug 2004 11:56:04 -0500 Message-ID: <41335BEB.2080202@verizon.net> Date: Mon, 30 Aug 2004 12:55:07 -0400 From: Finn Lassen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: redrive oil return References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------010507070104020707090304" X-Authentication-Info: Submitted using SMTP AUTH at out014.verizon.net from [4.12.145.173] at Mon, 30 Aug 2004 11:56:04 -0500 This is a multi-part message in MIME format. --------------010507070104020707090304 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit No need to wonder. Actually an indent is machined in the housing up to the outlet to improve on the friction pumping action of the ring gear. In any case, the incoming oil will push oil out the outlets and uphill if needed. And just in case someone missed this point: No restriction orifice is needed in the oil inlet line to any of Tracy's PSRUs, unlike the Ross PSRUs. So if converting from Ross to RWS, remove the 0.035" restriction! Finn Al Gietzen wrote: > > > > The lowest drain port on the drive is under the gear set. I'm > wondering if rotation of the ring gear would cause some "pumping" > action to force the oil out the drain. > > --------------010507070104020707090304 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit No need to wonder. Actually an indent is machined in the housing up to the outlet to improve on the friction pumping action of the ring gear.

In any case, the incoming oil will push oil out the outlets and uphill if needed.

And just in case someone missed this point: No restriction orifice is needed in the oil inlet line to any of Tracy's PSRUs, unlike the Ross PSRUs. So if converting from Ross to RWS, remove the 0.035" restriction!

Finn

Al Gietzen wrote:

Message

The lowest drain port on the drive is under the gear set. I’m wondering if rotation of the ring gear would cause some “pumping” action to force the oil out the drain.

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