X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 30 Jan 2012 12:21:36 -0500 Message-ID: X-Original-Return-Path: Received: from nm1-vm4.bullet.mail.ne1.yahoo.com ([98.138.91.161] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with SMTP id 5370214 for lml@lancaironline.net; Mon, 30 Jan 2012 12:13:46 -0500 Received-SPF: none receiver=logan.com; client-ip=98.138.91.161; envelope-from=chris_zavatson@yahoo.com Received: from [98.138.90.51] by nm1.bullet.mail.ne1.yahoo.com with NNFMP; 30 Jan 2012 17:13:11 -0000 Received: from [98.138.87.12] by tm4.bullet.mail.ne1.yahoo.com with NNFMP; 30 Jan 2012 17:13:11 -0000 Received: from [127.0.0.1] by omp1012.mail.ne1.yahoo.com with NNFMP; 30 Jan 2012 17:13:11 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 118182.85122.bm@omp1012.mail.ne1.yahoo.com Received: (qmail 61807 invoked by uid 60001); 30 Jan 2012 17:13:10 -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:In-Reply-To:MIME-Version:Content-Type; b=oydGRcK3v1BA2eAxdVHjaoENgnf0MFrLhVVhAMLX8uIrfqFMwmJYLRFdyd4dLZanMzePu2BRo4ykgTby0t4qID5IZtUZAGhd+OlMVK87vHl6g3/HN3IJkT1JD1+L7+8u4x9Z70YLeHLaWHl5gaITVZ2xU46Z+5zddiQABOHhfjE=; X-YMail-OSG: Y18LK9YVM1l37xkrfXwOtYqrYf6kMZZes1xDGeBA5cAqR3y fq9xlgiWXhuQSuoACIpmGZ3rInsJC.c1qgyX9pN_u35xd2WpE4lEznpB2Iit NvyT1G6k1p6zdZAeCGElVMGHlwqBqSUS8MvrXDXMjB2kDl1Rvfl2npsIhqty hFVjBU7r.iZzA9O29.kb0yKG05iSnpUf3K7CBNX4gutdyF4UYbaqPz2kvSEj bNImo7JozP.26iq9bNLebP3bAU0YGq9n2_dghQd_uTdirk90sKOovFKsQiS8 CjA3ZeCyWHmurIg15YZwKvblBrlGaEP04kdBvso69KhwmDrd4VPZSL59BVxX UO0ER6HD0OEm0gAfzpXJENX978vTH7R1SvO_AC7tIspt.w8gTlxa_eILeKSV 6_pki64YrZoZlINVIq2eirJ1HnZa9Ed5PKPwxzfknKJveAXwKQY58NK4ZENq E2Qrto_npRdf_lzcKeVROGrlyWqm9gkEz0GPRiRTJJI5cOvMEb6pRMk7uNBM bVHy8.7FZIyJabLkwjFOeMjN2ts2ABF6wlJlBPm__R3my Received: from [12.130.164.194] by web36903.mail.mud.yahoo.com via HTTP; Mon, 30 Jan 2012 09:13:10 PST X-Mailer: YahooMailWebService/0.8.116.331537 References: X-Original-Message-ID: <1327943590.35078.YahooMailNeo@web36903.mail.mud.yahoo.com> X-Original-Date: Mon, 30 Jan 2012 09:13:10 -0800 (PST) From: Chris Zavatson Reply-To: Chris Zavatson Subject: Re: [LML] Re: Hydraulic hoses X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-2114655128-2001782833-1327943590=:35078" ---2114655128-2001782833-1327943590=:35078 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Lorn, et al=0ARob is referring to the system downstream of the poppet valve= .=C2=A0 It is true that the pump and the adjustable relief valve will not a= llow the system to actively pressurize beyond the the relief valve setting.= =C2=A0 However once shut down, thermal heating can further raise the pressu= re level on the aircraft side.=C2=A0 There is a fixed=C2=A0thermal relief v= alve in the pump downstream of the poppet valve for just such a reason.=C2= =A0 I do not know what its setting is.=C2=A0 It is definitely greater that = 2,000 psi.=C2=A0 Given that the Oildyne pumps are rated to 3,000, I would n= ot be surprised if the thermal relief valve rating is greater than 3,000 ps= i.=0A=C2=A0=0AChris Zavatson=0AN91CZ=0A360std=0Awww.N91CZ.net=0A=C2=A0=0A= =C2=A0=0A=C2=A0=0AFrom: Lorn H Olsen =0ATo: lml@lancairon= line.net =0ASent: Monday, January 30, 2012 7:52 AM=0ASubject: [LML] Re: Hyd= raulic hoses=0A=0ARob,=0A=0AIf the hydraulic pump is working correctly, it = has a 1,400 to 1,500 PSI override. The pressure in both the up and down sid= e will never be greater than the override PSI.=0A=0ALorn=0A=0A> From: "Stev= ens Family" =0A> Date: January 29, 2012 5:16:11 P= M EST=0A> =0A> A quick query from =E2=80=9CDown Under=E2=80=9D. I am up to = building the hydraulic system for my Lancair 360, and need to purchase some= hydraulic hose for the gear retract system. I understand the system theore= tically operates at about 1500 PSI. However I have spoken to someone with e= xperience on a similar aircraft, and he said that he has observed pressures= over 2000 PSI, due to the heat soak phenomenon previously discussed on the= LML.=0A> =0A> My question is, what pressure hose have others used in their= aircraft? Do you have any suggestions or useful comments about building th= is system?=0A> =0A> Thanks in anticipation.=0A> =0A> Rob Stevens=0A> Perth,= Western Australia.=0A=0A--=0AFor archives and unsub http://mail.lancaironl= ine.net:81/lists/lml/List.html ---2114655128-2001782833-1327943590=:35078 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Lorn, et al
Rob is referring to = the system downstream of the poppet valve.  It is true that the pump a= nd the adjustable relief valve will not allow the system to actively pressu= rize beyond the the relief valve setting.  However once shut down, the= rmal heating can further raise the pressure level on the aircraft side.&nbs= p; There is a fixed thermal relief valve in the pump downstream of the= poppet valve for just such a reason.  I do not know what its setting = is.  It is definitely greater that 2,000 psi.  Given that the Oil= dyne pumps are rated to 3,000, I would not be surprised if the thermal reli= ef valve rating is greater than 3,000 psi.
 
Chris Zavatson
N91CZ
360std
 
 
 
From:= Lorn H Olsen <lorn@dynacomm.us>
To: lml@lancaironline.net
Sent: Monday, January 30, 2012 7:52 AM
<= SPAN style=3D"FONT-WEIGHT: bold">Subject: [LML] Re: Hydraulic ho= ses

Rob,

If the hydraulic pump is working correc= tly, it has a 1,400 to 1,500 PSI override. The pressure in both the up and = down side will never be greater than the override PSI.

Lorn

&= gt; From: "Stevens Family" <stevens5@swiftdsl.com.au&g= t;
> Date: January 29, 2012 5:16:11 PM EST
>
> A quick q= uery from =E2=80=9CDown Under=E2=80=9D. I am up to building the hydraulic s= ystem for my Lancair 360, and need to purchase some hydraulic hose for the = gear retract system. I understand the system theoretically operates at abou= t 1500 PSI. However I have spoken to someone with experience on a similar a= ircraft, and he said that he has observed pressures over 2000 PSI, due to t= he heat soak phenomenon previously discussed on the LML.
>
> M= y question is, what pressure hose have others used in their aircraft? Do yo= u have any suggestions or useful comments about building this system?
&g= t;
> Thanks in anticipation.
>
> Rob Stevens
> Pe= rth, Western Australia.

--
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