X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 31 Jan 2012 18:46:53 -0500 Message-ID: X-Original-Return-Path: Received: from nm10.bullet.mail.bf1.yahoo.com ([98.139.212.169] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with SMTP id 5372022 for lml@lancaironline.net; Tue, 31 Jan 2012 17:09:50 -0500 Received-SPF: none receiver=logan.com; client-ip=98.139.212.169; envelope-from=wfhannahan@yahoo.com Received: from [98.139.212.147] by nm10.bullet.mail.bf1.yahoo.com with NNFMP; 31 Jan 2012 22:09:15 -0000 Received: from [98.139.212.238] by tm4.bullet.mail.bf1.yahoo.com with NNFMP; 31 Jan 2012 22:09:15 -0000 Received: from [127.0.0.1] by omp1047.mail.bf1.yahoo.com with NNFMP; 31 Jan 2012 22:09:15 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 399896.29602.bm@omp1047.mail.bf1.yahoo.com Received: (qmail 66123 invoked by uid 60001); 31 Jan 2012 22:09:14 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=QFv/uaB8EjIYobyuRF6GDrDMss6oTC5bULnJDeLLlX+L0jpErvQA4Vc8WSzTV9gzusPCJRJrwEr2hUPwdXvdYSLkRj29+Z2V/E93jyplBfFOknJLqkwiijVuh1b9ecLO5tjZnQ6XnmujEdyCA2g38hpc8vyOnSNoEt9vi5an2R0=; X-YMail-OSG: JAWpaakVM1naymlGipDV1acS18HMov.NsKWgi7BAJTgan5x d4CdT0vUH7RwxZ0JcitK8.uQBP..DqMCRyWgU8YJZUiiP1NAoXlBYWXv3Lro pW0iiuYjCRh.8A8c6KRWkk8e7lQQvWRnMQQ4lYXooqAdAOHQzo2f6FtLbsBy Omo.DWkmVoBpDWzihgYsIgv4u.Q2LBbkxuAWSw9xBscOMVHXgD78xLiq8WBG RvOrukD4l0EhsRPM5ZtWpD_kKDSvKgGcejWDS9fDdYq_iGGx5zuMrMutNOSj ZEifhmK7Fvg6CH_54vDwg.f9prMO9aNrbGcevPESd.G1RaVweriVe9iNKW5O 87N0hZ49ZzsfSF93AEV3QHc9hFCkvx3DEegNbeccSAgfbzFbpMIDu61RhJPm wponGV6m1XTUdReacm456f2eq0zRkuVwlHQKEH47.U0SjU8s1x.0zLdIUrJG 4C07r70B1pRiq8u3HQ9nhLFamaMablknE6TCNbdFckOlQRJNB60I0H8p.07s H8VcE4Lx0.YWsxd4VcSSmXR1O7ggf9hX7iaWaqMFJtc9TsxWbly3IPZDiZrT Xq_BIjaEStmLeFlZbE6cOAg8ZWa998pEzNhrjFya75sEMhi7yPhET2voreTC XC9RqOxwdBorsCnK4au7CsAt59Bdy02nK3muncZcyuNHdIK_DLJeCwFB5kqA Q4nGv7petxxHTjfonXKmxiEWdtiz.VPg0DBaXC4gSxS8YfW5vH.MYVOql0QS EIIt7Q7ZAYjjZoBGV6tsdUmdgrMThfp6RBkZQyeN9FujTYTGRNOGLK6tEdU. 1N7tDuEzGJp_fa2oE4VKrf7k01klg3h2h61att7znu3pTS5gsaONYKjeUuX8 wT7._ewpQW7ipNcTMK0NZWul97UiEyHCOFqxevITA2oxWbLMRKpm3ScY8r.0 RHX4PNXwd5uc- Received: from [97.123.68.40] by web33906.mail.mud.yahoo.com via HTTP; Tue, 31 Jan 2012 14:09:14 PST X-Mailer: YahooMailClassic/15.0.4 YahooMailWebService/0.8.116.331537 X-Original-Message-ID: <1328047754.50480.YahooMailClassic@web33906.mail.mud.yahoo.com> X-Original-Date: Tue, 31 Jan 2012 14:09:14 -0800 (PST) From: Bill Hannahan Subject: 320/360 Hydraulic Pressure Switch X-Original-To: lml@lancaironline.net In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="1094781026-1947962373-1328047754=:50480" --1094781026-1947962373-1328047754=:50480 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable =0A=0A=0A=0A=C2=A0=0A=0ARegarding this quote on the trv from the Oildyne br= ocure;=0A=0A=C2=A0=0A=0A=E2=80=9CIt is a fixed relief valve with a pressure= =0A=0Asetting approximately 100-140 bar (1500-2000 psi)=0A=0Aabove the syst= em relief valve=0Apressure.=E2=80=9D=0A=0A=C2=A0=0A=0AAs I read this, if th= e pump is rated=0Ato produce flow at 3000 psi, the TRV is set for 4500 =E2= =80=93 5000 psi. That seems way=0Atoo high for our systems.=0A=0A=C2=A0=0A= =0A=C2=A0=0A=0AThe third set of pressure switches on=0Amy 360 are acting up= . I am thinking about a spring project to upgrade them. I=0Abought two new/= old stock pressure switches for about $75 including shipping.=0A=0A=C2=A0= =0A=0Ahttp://www.ebay.com/itm/DIRECT-AUTOMATION-PSD25-0P-1450H-PRESSURE-SWI= TCH-/220904940181?_trksid=3Dp3286.m7&_trkparms=3Dalgo%3DLVI%26itu%3DUCI%26o= tn%3D3%26po%3DLVI%26ps%3D63%26clkid%3D6005931030562248892=0A=0A=C2=A0=0A=0A= =C2=A0=0A=0AThey are limited to 250 ma load current and a max overload=0Aof= 2900 psi. My plan is to reset the TRV=E2=80=99s to the neighborhood of 120= 0 psi. At=0Athat pressure motor current is less than 30 amps.=0A=0A=C2=A0= =0A=0AI found 50 amp PNP Darlington=0Atransistors to replace the big power = relays. They have enough gain to be driven=0Adirectly from the pressure swi= tch through an appropriate resistor.=0A=0A=C2=A0=0A=0Ahttp://www.ebay.com/i= tm/MJ11032-Darlington-Power-transistors-NPN-Audio-Amp-x2-/180663839378?pt= =3DLH_DefaultDomain_0&hash=3Ditem2a10676a92=0A=0A=C2=A0=0A=0A=C2=A0=0A=0AI = would appreciate some information from those who have=0Ainstalled pressure = gauges. =0A=0A=C2=A0=0A=0A1=E2=80=A6 At what pressure does your up pressure= switch close and=0Aopen?=0A=0A=C2=A0=0A=0A2=E2=80=A6 At what pressure does= your down pressure switch close and=0Aopen?=0A=0A=C2=A0=0A=0A3=E2=80=A6 Do= es the momentum of the motor cause the pressure to=0Aspike well above the p= ressure setpoint?=0A=0A=C2=A0=0A=0A4=E2=80=A6 In high G pull-ups and/or tur= bulence, do you see=0Afluctuations in pressure, from what to what?=0A=0A=C2= =A0=0A=0AThanks for your feedback.=0A=0A=C2=A0=0A=0A=C2=A0=0A=0A Regards, Bill Hannahan =20 wfhannahan@yahoo.com --- On Mon, 1/30/12, Bruce wrote: From: Bruce Subject: [LML] Re: IV-P Hydraulic Pressure Switch To: lml@lancaironline.net Date: Monday, January 30, 2012, 12:05 PM =0A=0A=0A =0A=0A=0A =0A =0A =0A =0A=0A =0A=0A=0A=0A=0A=0A=0A=0A=0A=0AYou mi= ght look at, =0A=0A =C2=A0 =0A=0Ahttp://www.automationdirect.com/adc/Shoppi= ng/Catalog/Sensors_-z-_Encoders/Pressure_Sensors_-a-_Pressure_Gauges/Pressu= re_Switches/PSD25-0P-5800H =0A=0A =C2=A0 =0A=0ASolid state and adjustable, = don=E2=80=99t=0Aforget the matching cable =0A=0A =C2=A0 =0A=0A=0A=0ABruce =0AWWW.Glasair.org=0A =0A=0A=0A=0A-----Original Message----- =0AFrom: Lancair Mailing List=0A[mailto:lml@lancaironline.net] On Behalf Of= Craig=0ABerland. =0ASent: Monday, January 30, 2012=0A10:53 AM =0ATo: lml@lancaironline.net =0ASubject: [LML] IV-P Hydraulic=0APressure Switch=0A=0A =C2=A0 =0A=0AA few= weeks ago when returning home my main landing=0Agear failed to extend.=C2= =A0 I have determined the pressure switch that=0Acontrols the hydraulic pum= p relay has failed. The kit supplied switch has a=0Aminimum temperature rat= ing of -22 deg F.=C2=A0 Since my switch failed with=0Aabout 110 hrs on it, = has anybody found a better switch? =0A=0AOn a personal note: When building = N7VG, the only thing=0Amy wife wanted was her own personal landing gear lig= hts. She was all over the=0Afact that the mains did not lock down. The emer= gency pump worked and all is=0Awell. =0A=0ACraig Berland =0A=0AIV-P N7VG = =0A=0A =C2=A0 =0A=0A=0A=0A=0A=0A --1094781026-1947962373-1328047754=:50480 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable