X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 27 Feb 2013 11:55:20 -0500 Message-ID: X-Original-Return-Path: Received: from blu0-omc3-s26.blu0.hotmail.com ([65.55.116.101] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTP id 6086886 for lml@lancaironline.net; Wed, 27 Feb 2013 11:06:13 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.55.116.101; envelope-from=gary21sn@hotmail.com Received: from BLU172-DS24 ([65.55.116.72]) by blu0-omc3-s26.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Wed, 27 Feb 2013 08:05:39 -0800 X-EIP: [n4tqs/bR7CcTmTzDQ/bDifUQPIEGJ+Et] X-Originating-Email: [gary21sn@hotmail.com] X-Original-Message-ID: X-Original-Return-Path: gary21sn@hotmail.com From: "Gary Edwards" X-Original-To: "Lancair Mailing List" References: Subject: Re: 360 Gear Relays X-Original-Date: Wed, 27 Feb 2013 08:05:38 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_012A_01CE14C1.3A728370" X-Priority: 3 In-Reply-To: X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V10.50.0008.2100 Seal-Send-Time: Wed, 27 Feb 2013 08:05:38 -0800 X-OriginalArrivalTime: 27 Feb 2013 16:05:39.0000 (UTC) FILETIME=[490D8B80:01CE1504] This is a multi-part message in MIME format. ------=_NextPart_000_012A_01CE14C1.3A728370 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I concur with Scott. I've never had a an issue with orientation of the = relays. Only with inadvertantly leaving them 'heated up' with the = switch on for 60 minutes. They eventually worked after cycling the gear = 3 times after departing the landing pattern. Both were then replaced. Gary Edwards LNC2 ----- Original Message -----=20 From: Sky2high@aol.com=20 To: lml@lancaironline.net=20 Sent: Tuesday, February 26, 2013 8:46 PM Subject: [LML] Re: 360 Gear Relays Angier, Did you take it apart? One way an intermittent use purposed relay can fail is if it remains = selected for too long, heats up and melts the coil wire insulation which = can then harden and bind the core rod when the relay finally cools off. = If the system is wired as Lancair recommended, this is easily possible. = Say the Master switch is on for extended electrical system testing, the = gear switch is in the up position, the motor power breaker is pulled but = the relay coil power breaker is not and the hydraulic pressure is low = enough that the pressure switch is closed - thus power is applied to the = up relay for a long time eventually destroying it. There will be no = indication at the panel because the transition light is powered from the = relay contactor but the pump power breaker was pulled. The orientation is not the problem. Scott PS My relay coil power is fused and is obtained after the pump breaker = so that pulling the pump breaker removes all electricity from the = hydraulic system. In a message dated 2/26/2013 7:37:14 P.M. Central Standard Time, = N4ZQ@VERIZON.NET writes: Gear up relay failed today... Fortunately 4ZQ was up on jacks in her hangar at the time. Not sure if it was the orientation of the relays or simply age. In any event, new relays will be installed in the morning and their = orientation will be reversed. Angier Ames N4ZQ ------=_NextPart_000_012A_01CE14C1.3A728370 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I concur with Scott.  I've never had a an issue with = orientation of=20 the relays.  Only with inadvertantly leaving them 'heated up' with = the=20 switch on for 60 minutes.  They eventually worked after cycling the = gear 3=20 times after departing the landing pattern.  Both were then=20 replaced.
 
Gary Edwards
LNC2
----- Original Message -----
Sent: Tuesday, February 26, = 2013 8:46=20 PM
Subject: [LML] Re: 360 Gear = Relays

Angier,
 
Did you take it apart?
 
One way an intermittent use purposed relay can fail is if it = remains=20 selected for too long, heats up and melts the coil = wire insulation which=20 can then harden and bind the core rod when the relay finally = cools=20 off.  If the system is wired as Lancair recommended, this is = easily=20 possible.  Say the Master switch is on for extended electrical = system=20 testing, the gear switch is in the up position, the motor power = breaker is=20 pulled but the relay coil power breaker is not and the hydraulic = pressure is=20 low enough that the pressure switch is closed - thus power is applied = to the=20 up relay for a long time eventually destroying it.  There will be = no=20 indication at the panel because the transition light is powered from = the relay=20 contactor but the pump power breaker was pulled.
 
The orientation is not the problem.
 
Scott
 
PS My relay coil power is fused and is obtained after the pump = breaker so=20 that pulling the pump breaker removes all electricity from the = hydraulic=20 system.
 
 
In a message dated 2/26/2013 7:37:14 P.M. Central Standard Time,=20 N4ZQ@VERIZON.NET writes:
Gear=20 up relay failed today...
Fortunately 4ZQ was up on jacks in her = hangar at=20 the time.
Not sure if it was the orientation of the relays or = simply=20 age.
In any event, new relays will be installed in the morning = and their=20 orientation will be reversed.

Angier=20 = Ames
N4ZQ


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