X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 03 May 2012 08:28:12 -0400 Message-ID: X-Original-Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5520688 for lml@lancaironline.net; Thu, 03 May 2012 07:27:35 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=super_chipmunk@roadrunner.com X-Original-Return-Path: X-Authority-Analysis: v=2.0 cv=Hvb06jvS c=1 sm=0 a=+kuJ7Sa7hUpxs7xJxzDFzQ==:17 a=AeF9CLZUGkAA:10 a=1nuarMoDg38A:10 a=zTVDa7HKqxcA:10 a=Ia-xEzejAAAA:8 a=cNih9p5NSjNkhFkwPX4A:9 a=axaLG0s6cEqfUM7pvOIA:7 a=pILNOxqGKmIA:10 a=EzXvWhQp4_cA:10 a=pGLkceISAAAA:8 a=W5PA_s2rpVTD5T1FEyEA:9 a=1ZNQfhChRbggDodvmsAA:7 a=_W_S_7VecoQA:10 a=MSl-tDqOz04A:10 a=+kuJ7Sa7hUpxs7xJxzDFzQ==:117 X-Cloudmark-Score: 0 X-Originating-IP: 76.179.81.18 Received: from [76.179.81.18] ([76.179.81.18:56261] helo=WilliamHP) by cdptpa-oedge04.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 08/BF-16302-48B62AF4; Thu, 03 May 2012 11:27:00 +0000 X-Original-Message-ID: From: "Bill Wade" X-Original-To: "Lancair Mailing List" References: In-Reply-To: Subject: Re: [LML] Re: Contactors vs Solid State Relays X-Original-Date: Thu, 3 May 2012 07:26:57 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0057_01CD28FE.1F124E30" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 This is a multi-part message in MIME format. ------=_NextPart_000_0057_01CD28FE.1F124E30 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Thanks Paul- I=92m of the same vintage as the relay but = considerably more failure prone and less predictable- probably the = weakest link in the whole plane.=20 I=92ve had some experience with antique vehicles so I imagine the = lacquer on the windings and insulation materials would still be good- = I=92m curious about the resistance readings. I have a very basic = education from studying The AeroElectric Connection 15 years ago so I = hope to learn more. I=92m guessing the Leach has more windings of finer wire. Would that = make it more likely to overheat than the Lancair unit? Does it suggest = anything about the intended applications? Thanks- Bill Wade From: Paul Miller=20 Sent: Wednesday, May 02, 2012 4:32 PM To: lml@lancaironline.net=20 Subject: [LML] Re: Contactors vs Solid State Relays Well, Bill, using 1960's NOS parts for a modern airplane? That's about = the dumbest idea I've heard today.=20 Paul Legacy Spruce Creek (P.S. I'm using a dozen 1961 NOS spark plugs and the Legacy purrs much = better than my mega-ohm'd resistance chumpions so good luck as I'm = thinking your relay is well preserved and well built). =20 On 2012-05-02, at 3:15 PM, Bill Wade wrote: Aircraft Spruce carries a solid-state =93Superswitch=94 contactor = from Lamar Technologies. Has anyone used these? FWIW there are a number of NOS 24V 50A Leach contactors for sale on = Ebay. I got a few with the idea of replacing the hydraulic pump relay = supplied by Lancair. They arrived in sealed original packaging- no date = of manufacture but my guess is 50=92s or 60=92s. The exposed insulation = appears to be sound and the units function properly. The Leach unit weighs 8.12 oz., about 5 oz. less than the Lancair = style and the windings measure 152.7 Ohms vs. 62.7. The pump draws about = 30A at system pressure according to the Oildyne chart. Comments? Thanks- Bill Wade ------=_NextPart_000_0057_01CD28FE.1F124E30 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Thanks Paul-
           &n= bsp;        =20 I=92m of the same vintage as the relay but considerably more failure = prone and=20 less predictable- probably the weakest link in the whole plane.
 
  I=92ve had some experience with antique vehicles so I = imagine the=20 lacquer on the windings and insulation materials would still be good- = I=92m=20 curious about the resistance readings. I have a very basic education = from=20 studying The AeroElectric Connection 15 years ago so I hope to learn = more.
 
  I=92m guessing the Leach has more windings of finer wire. = Would that=20 make it more likely to overheat than the Lancair unit? Does it suggest = anything=20 about the intended applications?
 
  Thanks- Bill Wade
 
 
Sent: Wednesday, May 02, 2012 4:32 PM
Subject: [LML] Re: Contactors vs Solid State=20 Relays
 
Well,=20 Bill, using 1960's NOS parts for a modern airplane?  That's about = the=20 dumbest idea I've heard today.=20
 
Paul
Legacy
Spruce Creek
(P.S.  I'm using a dozen 1961 NOS spark plugs and the Legacy = purrs=20 much better than my mega-ohm'd resistance chumpions so good luck as I'm = thinking=20 your relay is well preserved and well built). 
On 2012-05-02, at 3:15 PM, Bill Wade wrote:
 
  = Aircraft=20 Spruce carries a solid-state =93Superswitch=94 contactor from Lamar = Technologies.=20 Has anyone used these?
 
  = FWIW there are=20 a number of NOS 24V 50A Leach contactors for sale on Ebay. I got a few = with=20 the idea of replacing the hydraulic pump relay supplied by Lancair. = They=20 arrived in sealed original packaging- no date of manufacture but my = guess is=20 50=92s or 60=92s. The exposed insulation appears to be sound and the = units=20 function properly.
 
  = The Leach unit=20 weighs 8.12 oz., about 5 oz. less than the Lancair style and the = windings=20 measure 152.7 Ohms vs. 62.7. The pump draws about 30A at system = pressure=20 according to the Oildyne chart. Comments?
 
  = Thanks- Bill=20 Wade
 
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