X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 03 Nov 2005 13:49:24 -0500 Message-ID: X-Original-Return-Path: Received: from [63.240.77.82] (HELO sccrmhc12.comcast.net) by logan.com (CommuniGate Pro SMTP 5.0) with ESMTP id 813090 for lml@lancaironline.net; Thu, 03 Nov 2005 01:12:15 -0500 Received-SPF: none receiver=logan.com; client-ip=63.240.77.82; envelope-from=rbelshe@comcast.net Received: from desk (c-67-188-253-134.hsd1.ca.comcast.net[67.188.253.134]) by comcast.net (sccrmhc12) with SMTP id <200511030611150120044h93e>; Thu, 3 Nov 2005 06:11:20 +0000 From: "Bob B." X-Original-To: "'Lancair Mailing List'" Subject: RE: [LML] Re: Lancair 320 gear problem -- help wanted X-Original-Date: Wed, 2 Nov 2005 22:09:38 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0080_01C5DFFA.21229620" X-Mailer: Microsoft Office Outlook, Build 11.0.6353 In-Reply-To: Thread-Index: AcXgG0QH3pgV5jFBQr66snFwhKeA+wABzOyw X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1506 X-Original-Message-ID: This is a multi-part message in MIME format. ------=_NextPart_000_0080_01C5DFFA.21229620 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Great experiment, Scott. I would expect that the pump would just get hot if you powered both leads. It might trip the breaker if you held power on long enough. Did you really get the pump to run in the "wrong" direction some of the time? You said "at least six sequential connections to both wires were made separated by a second or so (Dn-Up, Up-Dn) and all but one resulted in the pump running primarily in the down direction with foaming visible in the up direction tube.." Do you mean the pump keeps running when you connect 12v to the "other" wire? Do you mean it starts in one direction and then reverses when you connect the second wire? If the pump ever runs in the wrong direction it would open the wrong pressure switch and never shut down! Does anyone know how this motor is wound? I think it is probably a series motor with two field windings. It should be impossible to do what you reported. Also, it has been noted that the motor relays are Ford starter relays. In automotive service they would be starting and interrupting over ten times the current they see in our application. Fusing of the contacts should be a rare (if ever, occurrence). In the instance where relay power is left on for a long time they could stick in the closed position due to an internal melt down of some sort. Thanks again for your experiment, and all the good info you provide this group. Please don't take this as criticism. Like you, I'm just trying to understand why people have so many problems with the LNC2 gear system. Fortunately, I have had none, except for a blown seal and a leaky (in one direction only) dump valve. Bob Belshe Moraga, CA Lancair 235/320 http://home.comcast.net/~rbelshe/ ------=_NextPart_000_0080_01C5DFFA.21229620 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Great = experiment,=20 Scott.  
 
I would = expect that the=20 pump would just get hot if you powered both leads.   It might = trip the=20 breaker if you held power on long enough. 
 
Did you really get the pump to run in the = "wrong"=20 direction some of the time?  You said  "at least six = sequential=20 connections to both wires were made separated by a second or = so=20 (Dn-Up, Up-Dn) and all but one resulted in the pump running = primarily in=20 the down direction with foaming visible in the up direction = tube.."  Do you=20 mean the pump keeps running when you connect 12v to the "other" = wire?  Do=20 you mean it starts in one direction and then reverses when you connect = the=20 second wire?
 
If the pump = ever runs in=20 the wrong direction it would open the wrong pressure switch and never = shut=20 down!   
Does anyone = know how this=20 motor is wound?  I think it is probably a series motor with two = field=20 windings.  It should be impossible to do what you = reported.
 
Also, it has been noted that the = motor=20 relays are Ford starter relays.   In automotive service they = would be=20 starting and interrupting over ten times the current they see in our=20 application.  Fusing of the contacts should be a rare (if ever,=20 occurrence).   In the instance where relay power is left on = for a long=20 time they could stick in the closed position due to an internal = melt down=20 of some sort.
 
Thanks again for your experiment, = and all=20 the good info you provide this group.   Please don't take this = as=20 criticism. 
Like you, I'm just trying to = understand why=20 people have so many problems with the LNC2 gear system.  =
Fortunately, I have had none, = except for a=20 blown seal and a leaky (in one direction only) dump valve.
 

Bob Belshe
Moraga, CA
Lancair=20 235/320  
http://home.comcast.net/~rbels= he/=20

 
 



 
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