X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 04 Sep 2012 19:53:48 -0400 Message-ID: X-Original-Return-Path: Received: from imr-da04.mx.aol.com ([205.188.105.146] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTP id 5744148 for lml@lancaironline.net; Tue, 04 Sep 2012 18:04:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.105.146; envelope-from=Sky2high@aol.com Received: from mtaomg-ma05.r1000.mx.aol.com (mtaomg-ma05.r1000.mx.aol.com [172.29.41.12]) by imr-da04.mx.aol.com (8.14.1/8.14.1) with ESMTP id q84M3jBF007903 for ; Tue, 4 Sep 2012 18:03:45 -0400 Received: from core-mtd004b.r1000.mail.aol.com (core-mtd004.r1000.mail.aol.com [172.29.235.205]) by mtaomg-ma05.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id C1879E00008F for ; Tue, 4 Sep 2012 18:03:44 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Tue, 4 Sep 2012 18:03:44 -0400 (EDT) Subject: Re: [LML] Re: Thermal influence on Hydraulic Pressure X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_d93e.741fcf91.3d77d4bf_boundary" X-Mailer: AOL 9.6 sub 168 X-Originating-IP: [67.175.156.123] x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:434996704:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d290c50467ac02be8 --part1_d93e.741fcf91.3d77d4bf_boundary Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable Chris, =20 Thanks, the pdf is worth your weight in gold. The culmination of years in= =20 the belly of the beast. Marv should put in the LML ref material. =20 Scott Krueger =20 =20 In a message dated 9/4/2012 3:31:18 P.M. Central Daylight Time, =20 chris_zavatson@yahoo.com writes: =20 Danny, No affect on gear movement. I should add however that elevated high-side pressure is one of the=20 contributing factors to gear extension failures in a standard system set u= p. My=20 low pressure setting is higher than the nominal 550 psi. It is set to 800= =20 psi to avoid the pressure spike that propogates through the system when=20 gear down is selected. see "Failure to Extend" on page 10 for more detail. _http://www.n91cz.com/Hydraulics/Lancair%20Hydraulics.pdf_=20 (http://www.n91cz.com/Hydraulics/Lancair%20Hydraulics.pdf)=20 =20 Chris Zavatson N91CZ 360std _www.N91CZ.net_ (http://www.n91cz.net/) =20 =20 =20 =20 From: Danny To: lml@lancaironline.net=20 Sent: Monday, September 3, 2012 11:54 AM Subject: [LML] Re: Thermal influence on Hydraulic Pressure =20 =20 =20 Chris, What was the impact on the gear movement? =20 =20 Danny LNC2-360 N 38=B0 43' 25.7" W 77=B0 30' 38.6" =20 =20 =20 From: Chris Zavatson [mailto:chris_zavatson@yahoo.com]=20 Sent: Saturday, September 01, 2012 11:32 PM To: lml@lancaironline.net Subject: [LML] Thermal influence on Hydraulic Pressure =20 =20 =20 -took this photo after a descent from 16.5k to 1,500 ft. =20 OAT went from 42 to 94 degrees. =20 High Pressure gauge is pegged at 2,000+ psi =20 -Didn't get a photo, but the opposite happened on the ramp in Spokane.=20 After sitting for an hour, the low pressure gauge was pegged at 1,200 psi+= . =20 Spokane might not be the warmest spot in the country, but at 85 deg F, it= =20 was 55 degrees warmer than the cold soak on the previous leg. =20 Temperature changes have a big impact on system pressure.=20 =20 =20 Chris Zavatson =20 N91CZ =20 360std =20 http://www.n91cz.net/ --part1_d93e.741fcf91.3d77d4bf_boundary Content-Type: text/html; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable
Chris,
 
Thanks, the pdf is worth your weight in gold.  The culmination of= =20 years in the belly of the beast.  Marv should put in the LML ref= =20 material.
 
Scott Krueger
 
In a message dated 9/4/2012 3:31:18 P.M. Central Daylight Time,=20 chris_zavatson@yahoo.com writes:
=
Danny,
No affect on gear=20 movement.
I should add however that= =20 elevated high-side pressure is one of the contributing factors to gear=20 extension failures in a standard system set up.  My low pressure setting = ;is=20 higher than the nominal 550 psi.  It is set to 800 psi to avoid= the=20 pressure spike that propogates through the system when gear down is=20 selected. see "Failure to Extend" = on page=20 10 for more detail. http://= www.n91cz.com/Hydraulics/Lancair%20Hydraulics.pdf   Chris=20 Zavatson N91CZ 360std www.N91CZ.net   

From: Danny=20 <danny@n107sd.com>
To:=20 lml@lancaironline.net
Sent:=20 Monday, September 3, 2012 11:54 AM
Subject: [LML] Re: Thermal influen= ce on=20 Hydraulic Pressure

Chris,
= What was=20 the impact on the gear movement?
 
Danny
LNC2-360
= N 38=B0 43'=20 25.7"
= W 77=B0 30'=20 38.6"
 
From: Chris Zav= atson=20 [mailto:chris_zavatson@yahoo.com]
Sent: Saturday, September 01, 2012= 11:32=20 PM
To:=20 lml@lancaironline.net
Subject: [LML] Thermal influence o= n=20 Hydraulic Pressure
 
-took=20 this photo after a descent from 16.5k to 1,500=20 ft.
OAT went=20 from 42 to 94 degrees.
High=20 Pressure gauge is pegged at 2,000+ psi
-Didn't=20 get a photo, but the opposite happened on the ramp in Spokane. After= =20 sitting for an hour, the low pressure gauge was pegged at 1,200 psi+.&nbs= p;=20 Spokane might not be the warmest spot in the country, but at 85 deg F, it= was=20 55 degrees warmer than the cold soak on the previous=20 leg.
Temperature=20 changes have a big impact on system pressure. 
 
Chris=20 Zavatson
N91CZ
360std
http://www.n91cz.net/
<= BR>
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