X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 04 Sep 2012 16:18:53 -0400 Message-ID: X-Original-Return-Path: Received: from nm39-vm3.bullet.mail.ne1.yahoo.com ([98.138.229.163] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with SMTP id 5743323 for lml@lancaironline.net; Tue, 04 Sep 2012 11:53:00 -0400 Received-SPF: none receiver=logan.com; client-ip=98.138.229.163; envelope-from=chris_zavatson@yahoo.com Received: from [98.138.90.53] by nm39.bullet.mail.ne1.yahoo.com with NNFMP; 04 Sep 2012 15:52:24 -0000 Received: from [98.138.89.193] by tm6.bullet.mail.ne1.yahoo.com with NNFMP; 04 Sep 2012 15:52:24 -0000 Received: from [127.0.0.1] by omp1051.mail.ne1.yahoo.com with NNFMP; 04 Sep 2012 15:52:24 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 9741.18805.bm@omp1051.mail.ne1.yahoo.com Received: (qmail 39695 invoked by uid 60001); 4 Sep 2012 15:52:23 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type; b=vusrZEnMWS0xPTBNFvO+omJouhfQ9VJoaCbgU2vcHabQeyFD/1nTLs8WSuCwTxlLiqN7Ccxh98Q0zTymfLtqOorXed3PBvxnLx8yqwK1bO9vHq7y5+nwEnvPiQJniJjbzUWc8/9z552PoFdZOQEkAEsDWX0tXTu1QVdNKVH84B0=; X-YMail-OSG: SY1CqOoVM1m3M798kiDCN1NM7wFv2UU1GsYn.ZA8AMY53RS oIiSb_XvfuQxAFf4CwakLdMNCiBZktILfDMEA3Ozs4J5_43r7i30gfjYQq01 rrUUmCYppvdZf68dDd2IdFwvuSr0vmmyrJl1B4dcaZJk4ZcZfWLIj0N_C_Ce AQ60B6o55fW1pKyvS3sdfA0iYIDYcHj9vbVNgx16i.1lTftadIE2YF9I96Nm knXMGBWynuXWm81.k.IB3mK0SdfEI0NeKZ_StmucKwIp0KboUEBCbTky8oZE jSMa3SO7.U4jhh9W1a8Er6bvqs6jK_nzljr3hlxipC4KZwrcTW4QFPQOrf_d D.I4aUnuMxEno72gGzhyZazKORtTOrqdoDKr7DQn.ZKlxPpNkHCYzFKlelpj 580hm77fUegiEGU7X8ySCRvWO0ELCQ9kcxG1pFHTZ1C6irT5aTqrQPVYA73u kFG2km_Ej_rIP.a5k9mxotjI.ehxhj68kz3sUv8gmacOjLq_i2rm_BG.AgAZ 6gB_gYCkQn.dWYI3TtkuDGhO2KxFHliAniLOStcMJrKlDa5d8ha17zjKLRzs 4sijp1VxrKyLvl25r0yc9bbzUHGcVzCSMF036B_kX_Gz.FfCepRFM Received: from [12.130.164.194] by web121601.mail.ne1.yahoo.com via HTTP; Tue, 04 Sep 2012 08:52:23 PDT X-Mailer: YahooMailWebService/0.8.121.416 References: X-Original-Message-ID: <1346773943.33107.YahooMailNeo@web121601.mail.ne1.yahoo.com> X-Original-Date: Tue, 4 Sep 2012 08:52:23 -0700 (PDT) From: Chris Zavatson Reply-To: Chris Zavatson Subject: Re: [LML] Re: Thermal influence on Hydraulic Pressure X-Original-To: Lancair Mailing List MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-1977980688-1494883566-1346773943=:33107" ---1977980688-1494883566-1346773943=:33107 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Danny,=0ANo affect on gear movement.=0AI should add however that elevated h= igh-side pressure is one of the contributing factors to gear extension fail= ures in a standard system set up.=A0 My low pressure setting=A0is higher th= an the nominal 550 psi.=A0=A0It is set to 800 psi to avoid the pressure spi= ke that propogates through the system when gear down is selected.=0Asee "Fa= ilure to Extend" on page 10 for more detail.=0Ahttp://www.n91cz.com/Hydraul= ics/Lancair%20Hydraulics.pdf=0A=A0=0AChris Zavatson=0AN91CZ=0A360std=0Awww.= N91CZ.net=A0=0A=A0=0A=0AFrom: Danny =0ATo: lml@lancaironl= ine.net =0ASent: Monday, September 3, 2012 11:54 AM=0ASubject: [LML] Re: Th= ermal influence on Hydraulic Pressure=0A=0A=0AChris,=0AWhat was the impact = on the gear movement?=0A=A0=0ADanny=0ALNC2-360=0AN 38=B0 43' 25.7"=0AW 77= =B0 30' 38.6"=0A=A0=0AFrom:Chris Zavatson [mailto:chris_zavatson@yahoo.com]= =0ASent: Saturday, September 01, 2012 11:32 PM=0ATo: lml@lancaironline.net= =0ASubject: [LML] Thermal influence on Hydraulic Pressure=0A=A0=0A-took thi= s photo after=A0a descent from 16.5k to 1,500 ft.=0AOAT=A0went from 42 to 9= 4 degrees.=0AHigh Pressure gauge is pegged at 2,000+ psi=0A-Didn't get a ph= oto, but the opposite happened on the ramp in Spokane.=A0After sitting for = an hour, the low pressure gauge was pegged at 1,200 psi+.=A0 Spokane might = not be the warmest spot in the country, but at 85 deg F, it was 55 degrees = warmer than the cold soak on the previous leg.=0ATemperature changes have a= big impact on system pressure.=A0=0A=A0=0AChris Zavatson=0AN91CZ=0A360std= =0Ahttp://www.n91cz.net/ ---1977980688-1494883566-1346773943=:33107 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Danny,
No affect on gear movement.
I should add however that elevated high-side pressure= is one of the contributing factors to gear extension failures in a standar= d system set up.  My low pr= essure setting is higher than the nominal 550 psi.  It is se= t to 800 psi to avoid the pressure spike that propogates through the system= when gear down is selected.
see "Failure to Extend" on page 10 for more detail.<= /SPAN>
=  
= Chris Zavatson
N91CZ<= /DIV>
360std=
 

From: Danny <danny@n107sd.com>
To: lml@lancaironline.net
Sent: Monday, September 3, 2012 11:54 = AM
Subject: [LML] Re: Th= ermal influence on Hydraulic Pressure