X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 05 Sep 2012 12:28:42 -0400 Message-ID: X-Original-Return-Path: Received: from nm7-vm0.bullet.mail.sp2.yahoo.com ([98.139.91.192] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with SMTP id 5745167 for lml@lancaironline.net; Wed, 05 Sep 2012 09:22:06 -0400 Received-SPF: none receiver=logan.com; client-ip=98.139.91.192; envelope-from=chris_zavatson@yahoo.com Received: from [98.139.91.64] by nm7.bullet.mail.sp2.yahoo.com with NNFMP; 05 Sep 2012 13:21:30 -0000 Received: from [98.139.91.45] by tm4.bullet.mail.sp2.yahoo.com with NNFMP; 05 Sep 2012 13:21:30 -0000 Received: from [127.0.0.1] by omp1045.mail.sp2.yahoo.com with NNFMP; 05 Sep 2012 13:21:30 -0000 X-Yahoo-Newman-Id: 575808.81274.bm@omp1045.mail.sp2.yahoo.com Received: (qmail 26611 invoked from network); 5 Sep 2012 13:21:29 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=DKIM-Signature:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:Subject:References:From:Content-Type:X-Mailer:In-Reply-To:Message-Id:Date:To:Content-Transfer-Encoding:Mime-Version; b=QZxf4OlPHcFyEDEGIUa7xFwN9bKyqV0GHBpNcfy6Qd3HkeYJLsn3vlgkCmsPikZ5J26Ner/taMvbnIzJFwnBmErZ/z6MFR0XkLFpo/0gP6CCVcx6rJ/n9JUHjtw1bj9OVOvoaAkJ+HK/DYr4OMmAECNMlUtOHGx3ftKEgE5xawA= ; X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: fv8Yh7EVM1lpGmiNaeFof8EdCt_FWBZBhUQ2VmbdMu591Oc BTCcOwOhdx357TEjvJ6VCvPVIel3C2YV656G_vuiAn6UsXhk0EXCIxURCQhF 8u_8EqkH4a_uyI_2TouNTsHeZdIWskyF0556uYjlsKjMi88G0N7Xx02ah1Wh s90sJSVpL.IP3Q1DTdQC4aUT84jHR_Y3FOuUTZR8D28sLnGbtaf2MnKrQMaR yKy12dV9Py6.SnUGfFA9LOjbOq88Pg7fpj2ZCObGrf2n0Pk0dTDmygYAhT6a jee5TpfVvUy8rxwGevhLDKKfdMW2da1oDzcSrYKAwDdWecIKwy4mPGE4iw1A TbF0AFC0bUJ4Jz8hOUi35COrmwKCAIemhuEF7QnA5nZaO_XXZLOJ9P_uUGM0 8wJYQObBh6gUdF.ZCeuzgBlDGYV9dzCmoXG4R4RgHbxk_eKq97DtJanlRZkF xFOlrpHBzshZTn2EQpWq_WRiLA8QWrTdaZnbD8uHHlquuLjgjg6lvLPB34C_ a_YA- X-Yahoo-SMTP: 076hgjCswBC.G6e0vm7vgvZ9JJ0zmeBo_Oyw Received: from [192.168.1.78] (chris_zavatson@76.246.61.55 with xymcookie) by smtp108-mob.biz.mail.gq1.yahoo.com with SMTP; 05 Sep 2012 06:21:29 -0700 PDT Subject: Re: [LML] Re: Temp effect on hydraulics References: From: Chris Zavatston Content-Type: multipart/alternative; boundary=Apple-Mail-EADA259C-8EFA-4918-8502-11289322C1FC X-Mailer: iPhone Mail (9A405) In-Reply-To: X-Original-Message-Id: <3EA982FC-448A-49B3-9195-1ED65B04CD3D@yahoo.com> X-Original-Date: Wed, 5 Sep 2012 06:21:26 -0700 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-EADA259C-8EFA-4918-8502-11289322C1FC Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Oops, just noticed I listed the modulus instead CTE ~8E-04 /deg C Chris Sent from my spiffy iPhone On Sep 4, 2012, at 4:53 PM, Chris Zavatson wrote:= > Ed, > Coefficient of Thermal Expansion of hydraulic fluid ~270,000 psi. > Air in the system would make it very soft - think Ideal Gas Law - until th= e pressure gets really high. It would take a much larger change in volume to= get a big change in pressure. > Consider the nose strut. Pressure goes up as the strut is compressed over= several inches. Now imagine the strut completely filled with fork-oil. It= will still move, but not by much.=20 > Brakes systems are a different animal. They are not closed systems until t= he brakes are actually in use.=20 > Chris > =20 > Chris Zavatson > N91CZ > 360std > http://www.n91cz.net/ >=20 > From: Ed Gray > To: lml@lancaironline.net=20 > Sent: Tuesday, September 4, 2012 1:18 PM > Subject: [LML] Re: Temp effect on hydraulics >=20 > What is the coefficient of heat expansion on hydraulic fluid? Seems that > big pressure changes would be caused by trapped air. Auto brakes don't fa= il > in low or high temps. Could it be trapped air in the fluid line to the > sensor? > Ed Gray L360 Nearly complete with test hours, Dallas >=20 > -----Original Message----- > From: Lancair Mailing List [mailto:lml@lancaironline.net]=20 > Sent: Tuesday, September 04, 2012 5:01 AM > Subject: lml Digest #3893 >=20 > Lancair Mailing List Digest #3893 >=20 > 1) Re: Critical Service Bulletin > by Silvio Novelli > 2) Barrett at fly-in > by "Claudette Colwell" > 3) Re: Critical Service Bulletin on Cruise RPM > by Silvio Novelli > 4) Re: Critical Service Bulletin on Cruise RPM > by Colyn Case > 5) Re: Thermal influence on Hydraulic Pressure > by "Danny" > 6) Re: Thermal influence on Hydraulic Pressure > by Frederick Moreno >=20 > This digest is sent to you because you are subscribed to > the mailing list . > For archives and help click > http://mail.lancaironline.net:81/Lists/lml/List.html > LML website: http://www.lancaironline.net/maillist.html >=20 >=20 > -- > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.htm= l >=20 >=20 --Apple-Mail-EADA259C-8EFA-4918-8502-11289322C1FC Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
Oops, just noticed = I listed the modulus instead
CTE =7E8E-04 /deg = C
Chris


Sent from my spiffy = iPhone

On Sep 4, 2012, at 4:53 PM, Chris Zavatson <chris_zavatson=40yahoo.com> wrote:

Coefficient of = Thermal Expansion of hydraulic fluid =7E270,000 psi.
Air in the system = would make it very soft - think Ideal Gas Law - until the pressure gets = really high. It would take a much larger change in volume to get a big = change in pressure.
Consider the nose = strut.  Pressure goes up as the strut is compressed over several = inches.  Now imagine the strut completely filled with fork-oil.  = It will still move, but not by much. 
Brakes systems are a = different animal. They are not closed systems until the brakes are = actually in use. 
Chris
 
Chris = Zavatson
N91CZ
360std

From: Ed Gray <egraylaw=40swbell.net>
= To: lml=40lancaironline.net =
Sent: Tuesday, = September 4, 2012 1:18 PM
Subject: =5BLML=5D Re: Temp effect on = hydraulics

What is the coefficient of heat expansion = on hydraulic fluid?  Seems that
big pressure changes would be = caused by trapped air.  Auto brakes don't fail
in low or high = temps.  Could it be trapped air in the fluid line to = the
sensor?
Ed Gray L360 Nearly complete with test hours, Dallas

-----Original = Message-----
From: Lancair Mailing List =5Bmailto:lml=40lancaironline.net= =5D
Sent: Tuesday, September 04, 2012 5:01 AM
Subject: lml Digest = =233893

        Lancair Mailing List Digest = =233893

1) Re: Critical Service Bulletin
    by Silvio = Novelli <ppxsn=40novellisouza.com= =2Ebr>
2) Barrett at fly-in
    by =22Claudette = Colwell=22 <colwell.ch=40gmail.com>= ;
3) Re: Critical Service Bulletin on Cruise RPM
    by = Silvio Novelli <ppxsn=40novellisouza.com= =2Ebr>
4) Re: Critical Service Bulletin on Cruise RPM
  =   by Colyn Case = <colyncase=40earthlink.net<= /a>>
5) Re: Thermal influence on Hydraulic Pressure
    = by =22Danny=22 <danny=40n107sd.com>
6) = Re: Thermal influence on Hydraulic Pressure
    by Frederick = Moreno <frederickmoreno=40bigp= ond.com>

This digest is sent to you because you are = subscribed to
  the mailing list <lml=40lancaironline.net&= gt;.
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