X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Thu, 23 Nov 2006 11:16:48 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d03.mx.aol.com ([205.188.157.35] verified) by logan.com (CommuniGate Pro SMTP 5.1.2) with ESMTP id 1597026 for lml@lancaironline.net; Thu, 23 Nov 2006 10:59:36 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.157.35; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d03.mx.aol.com (mail_out_v38_r7.6.) id q.c11.aa4b055 (40523) for ; Thu, 23 Nov 2006 10:59:01 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Thu, 23 Nov 2006 10:59:01 EST Subject: Re: [LML] Re: Electrical /Hydraulic system questionslancair235/320 X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1164297541" X-Mailer: 9.0 Security Edition for Windows sub 5330 X-Spam-Flag: NO -------------------------------1164297541 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 11/23/2006 9:49:33 A.M. Central Standard Time, rosenzweig2@verizon.net writes: About the pressure building in flight, I have a seperate light that illuminates anytime the pump is running. Sometimes it cycles on during flight to repressurize. Do you know if your pumps are doing that? Steve, It is not unusual of the cycles are short and far apart. Once engaged, a pressure switch has a holding range of several hundred psi. Under the rigors of flight, G greater than one maneuvers, temperature changes and less than perfect seals, it is understandable that the pump would occasionally need to re-build the pressure that is characterized by a short blip. My pump blips maybe once every 1/2 hour in flight. I have left my airplane over a weekend on jacks with the gear retracted (power shut down) and returned on Monday to see little, if any, door sag. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) A man has got to know his limitations. -------------------------------1164297541 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 11/23/2006 9:49:33 A.M. Central Standard Time,=20 rosenzweig2@verizon.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

About the pressure building in flight, I=20= have a=20 seperate light that illuminates anytime the pump is running. Sometim= es=20 it cycles on during flight to repressurize. Do you know if your pump= s=20 are doing that?

Steve,

It is not unusual of the cycles are short and far apart. Once=20 engaged, a pressure switch has a holding range of several hundred psi. = =20 Under the rigors of flight, G greater than one maneuvers, temperature change= s=20 and less than perfect seals, it is understandable that the pump=20 would occasionally need to re-build the pressure that is characterized=20= by a=20 short blip.

My pump blips maybe once every 1/2 hour in flight. I have left my= =20 airplane over a weekend on jacks with the gear retracted (power shut down) a= nd=20 returned on Monday to see little, if any, door sag. =20

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

A m= an=20 has got to know his limitations.

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