Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Fri, 12 Mar 2004 22:23:23 -0500 Message-ID: X-Original-Return-Path: Received: from mta-out-1.udlp.com ([207.109.1.8] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3076688 for lml@lancaironline.net; Fri, 12 Mar 2004 21:51:09 -0500 Received: from asdmngwia.mpls.udlp.com (asdmngwia.mpls.udlp.com [10.1.62.22]) by mta-out-1.udlp.com (8.12.10/8.12.10) with ESMTP id i2D1MZBb017323 for ; Fri, 12 Mar 2004 19:22:35 -0600 Received: from DM-MN-06-MTA by asdmngwia.mpls.udlp.com with Novell_GroupWise; Fri, 12 Mar 2004 20:51:03 -0600 X-Original-Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.1 X-Original-Date: Fri, 12 Mar 2004 20:50:53 -0600 From: "Christopher Zavatson" X-Original-To: Subject: Re: [LML] Re: Possible Gear Hydraulic System Vapor Lock Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Lorn, Question. What is the pressure in your low circuit during retraction? It = should be low, perhaps 50 psi. This is the backpressure circuit doing its = job, allowing the extra fluid to bleed back to the reservoir. Once you = are airborne and pressure leaks across from the high side to the low side, = it should continue to relieve back to the reservoir. =20 I just got back from the airport where I tried to replicate your scenario = on my test bench. I could not get the low side to maintain any pressure = while a leak was slowly bleeding across from high to low. If I let it = bleed more quickly, I could hear the fluid squirting back into the = reservoir. My test bench is an exact duplicate of the system in the = airplane but with extra valves and pressure gauges to isolate and monitor = the particular cylinder or cylinders being tested. I would be curious to = know what your pressure indication is on the low side during retraction. = If it is at or near zero with the gear coming up, you've got a real head = scratcher on your hands. Chris