X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 07 Feb 2011 22:18:55 -0500 Message-ID: X-Original-Return-Path: Received: from mail.glasair.org ([65.75.24.102] verified) by logan.com (CommuniGate Pro SMTP 5.4c2a) with ESMTPS id 4841370 for lml@lancaironline.net; Mon, 07 Feb 2011 16:10:46 -0500 Received-SPF: none receiver=logan.com; client-ip=65.75.24.102; envelope-from=BGray@glasair.org Received: from gray1 by mail.glasair.org (VisNetic.MailServer.v9.1.4.1) with ESMTP id QXR71808 for ; Mon, 07 Feb 2011 16:10:08 -0500 From: "Bruce" X-Original-To: "'Lancair Mailing List'" Subject: RE: [LML] Re: LNC2 Hydraulic Landing Gear Pressure Switch Wear Issues X-Original-Date: Mon, 7 Feb 2011 16:10:07 -0500 X-Original-Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_010C_01CBC6E1.7D0D5C80" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5994 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_010C_01CBC6E1.7D0D5C80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I would think that =BD amp at 14v should be enough. =20 Bruce WWW.Glasair.org=20 -----Original Message----- From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Sky2high@aol.com Sent: Monday, February 07, 2011 2:53 PM To: lml@lancaironline.net Subject: [LML] Re: LNC2 Hydraulic Landing Gear Pressure Switch Wear Issues =20 Their specs look great. Is the 500 mA current limitation adequate for operating clunky 12 VDC intermittent relays (the pump power switch relays)? =20 Grayhawk =20 In a message dated 2/7/2011 11:32:18 A.M. Central Standard Time, BGray@glasair.org writes: Several of our guys (including me) have junked our mechanical pressure switches and moved to solid state adjustable switches. =20 http://www.automationdirect.com/adc/Search/Search?searchquery=3DPSD25-OP-= 5 800H &cmd=3DSearch&fctype=3Dadc.falcon.search.SearchFormCtrl&TxnNumber=3D-1 =20 =20 Bruce WWW.Glasair.org=20 -----Original Message----- From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Don Gordon Sent: Monday, February 07, 2011 7:45 AM To: lml@lancaironline.net Subject: [LML] LNC2 Hydraulic Landing Gear Pressure Switch Wear Issues =20 I have recently replaced both my high pressure and low pressure switches in the hydraulic system for the landing gear. These switches began to have trouble providing a positive and discrete on/off event when the hydraulic pressure reached the prescribed limits. I began to hear strange crackling and static noises in my headset just prior to the hydraulic pump running (though it would just run for a fraction of a second to re-pressurize). These strange sounds in my headset began to occur longer and longer prior to the pump tripping on. I also began to notice some other odd electrical issues with the aircraft. Finally, I began to suspect these switches were faulty are replaced both of them. The problem went away and so did my electrical issues I experienced. =20 =20 ------=_NextPart_000_010C_01CBC6E1.7D0D5C80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I would think = that ½ amp at 14v should be enough.

 

Bruce
WWW.Glasair.org

-----Original = Message-----
From: Lancair Mailing = List [mailto:lml@lancaironline.net] On = Behalf Of Sky2high@aol.com
Sent: Monday, February = 07, 2011 2:53 PM
To: = lml@lancaironline.net
Subject: [LML] Re: LNC2 = Hydraulic Landing Gear Pressure Switch Wear Issues

 

Their specs look great.  Is the 500 mA current limitation adequate for = operating clunky 12 VDC intermittent relays (the pump power switch = relays)?

 

Grayhawk

 

In a message dated 2/7/2011 11:32:18 A.M. Central Standard Time, = BGray@glasair.org writes:

Several of our guys (including me) = have junked our mechanical pressure switches and moved to solid state = adjustable switches.

 

http://www.automationdirect.com/adc/Search/Searc= h?searchquery=3DPSD25-OP-5800H&cmd=3DSearch&fctype=3Dadc.falcon.s= earch.SearchFormCtrl&TxnNumber=3D-1

 

 

Bruce
WWW.Glasair.org

-----Original Message-----
From: Lancair Mailing = List [mailto:lml@lancaironline.net] On = Behalf Of Don Gordon
Sent: Monday, February = 07, 2011 7:45 AM
To: = lml@lancaironline.net
Subject: [LML] LNC2 = Hydraulic Landing Gear Pressure Switch Wear Issues

 

I have = recently replaced both my high pressure and low pressure switches in the = hydraulic system for the landing gear.  These switches began to have trouble providing a positive and discrete on/off event when the hydraulic = pressure reached the prescribed limits.  I began to hear strange crackling = and static noises in my headset just prior to the hydraulic pump running = (though it would just run for a fraction of a second to re-pressurize).  These strange sounds in my headset began to occur longer and longer prior to = the pump tripping on.  I also began to notice some other odd electrical = issues with the aircraft.  Finally, I began to suspect these switches were = faulty are replaced both of them.  The problem went away and so did my = electrical issues I experienced.

 

 

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