Return-Path: Received: from fed1rmmtao01.cox.net ([68.230.241.38] verified) by logan.com (CommuniGate Pro SMTP 4.2.3) with ESMTP id 439591 for flyrotary@lancaironline.net; Fri, 01 Oct 2004 13:13:54 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.38; envelope-from=ALVentures@cox.net Received: from BigAl ([68.107.116.221]) by fed1rmmtao01.cox.net (InterMail vM.6.01.03.04 201-2131-111-106-20040729) with ESMTP id <20041001171321.GUWX10580.fed1rmmtao01.cox.net@BigAl> for ; Fri, 1 Oct 2004 13:13:21 -0400 From: "Al Gietzen" To: "Rotary motors in aircraft" Subject: oil injector pump Date: Fri, 1 Oct 2004 10:13:28 -0700 Message-ID: <000001c4a7d9$f8480db0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4A79F.4BEBA6B0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C4A79F.4BEBA6B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable My 20B came with a 4-port injector/metering pump from a 13B with three = ports feeding the 3 rotors and one port blocked. The pump began leaking = (dripping out around the adjustment lever shaft) during the dyno runs; and then continuing to get worse as the pump finally stopped pumping after a = total of maybe 4-5 hrs operation. The replacement pump pumps very well, but immediately began showing some leakage. =20 I don't know the outlet plumbing of the pump, but it is a positive displacement from the plunger, and as metering pump I'm thinking it may = be setup for positive flow to each port; so blocking a port may be the = cause of the leakage and failure. =20 Anyone have some input on this? =20 Thanks, =20 Al ------=_NextPart_000_0001_01C4A79F.4BEBA6B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

My 20B came with a 4-port injector/metering pump = from a 13B with three ports feeding the 3 rotors and one port blocked. = The pump began leaking (dripping out around the adjustment lever shaft) during = the dyno runs; and then continuing to get worse as the pump finally stopped = pumping after a total of maybe 4-5 hrs operation. The replacement pump = pumps very well, but immediately began showing some leakage.

I don’t know the outlet plumbing of the pump, = but it is a positive displacement from the plunger, and as metering pump = I’m thinking it may be setup for positive flow to each port; so blocking a = port may be the cause of the leakage and failure.

Anyone have some input on this?

Thanks,

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