X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from SMTP02.INFOAVE.NET ([165.166.0.27] verified) by logan.com (CommuniGate Pro SMTP 4.3.2) with ESMTP id 964814 for flyrotary@lancaironline.net; Thu, 26 May 2005 21:23:50 -0400 Received-SPF: none receiver=logan.com; client-ip=165.166.0.27; envelope-from=Jewen@Comporium.net Received: from engineer1 ([206.74.87.186]) by SMTP00.InfoAve.Net (PMDF V6.2-X31 #30986) with SMTP id <01LOQ8DVWZ0K9E7C6K@SMTP00.InfoAve.Net> for flyrotary@lancaironline.net; Thu, 26 May 2005 21:23:03 -0400 (EDT) Date: Thu, 26 May 2005 21:20:58 -0400 From: Joe Subject: Re: [FlyRotary] D-sub connectors - Prewired cables To: Rotary motors in aircraft Message-id: <008701c5625a$567b3160$6532a8c0@engineer1> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Mailer: Microsoft Outlook Express 6.00.2800.1158 Content-type: multipart/alternative; boundary="----=_NextPart_000_0084_01C56238.CF3EB0D0" X-Priority: 3 X-MSMail-priority: Normal References: This is a multi-part message in MIME format. ------=_NextPart_000_0084_01C56238.CF3EB0D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Al, I second your motion on the crimped connectors. I replaced the solder = type connector that came with my EC-2 with the crimped pin type. Much = easier, faster and I feel more reliable than a soldered connection. = SteinAir.com has a D Sub crimping tool for $31. I would add that there = are 2 basic types of pins, one is formed from sheet metal, the other is = milled from stock. The Aeroelectric and Steinair tools are for the = milled type. Joe ----- Original Message -----=20 From: Al Gietzen=20 To: Rotary motors in aircraft=20 Sent: Thursday, May 26, 2005 12:20 PM Subject: [FlyRotary] D-sub connectors - Prewired cables One thing to consider is that with a canard pusher you can't get a = prewired harness installed easily because the plugs won't go down the = electrical conduit. A harness could be installed during the fuselage = construction, but once the fuselage is built you either have to run the harness another = way, add a connector, or snip and resolder all the wires. One easy solution is to use the gold plated, machined crimp-on d-sub = pins. Put all the pins on, but pull the wire bundle to where it goes = before snapping the pins into the connector.=20 After doing all my avionics and EFIS plugs with the gold plated = crimp-on D-subs, I got to love them. Quick easy, and with the special = D-sub crimp tool; very secure connections. Snap them into the connector = after making and checking the crimp. I'm recommending that Tracy go that route. Yeah, it takes a good tool = ($44 t Aeroelectric = http://www.bandc.biz/cgi-bin/ez-catalog/cat_display.cgi?9X358218#RCT-3) = I believe in soldered connections for all critical leads that carry much = current, but the risks involved in soldering those little solder-socket = d-subs that are already in the connector - I don't think so.=20 It is especially important on the EM2 P-1 connector because the TC = wire does not solder well. Tinned copper works OK, but the TC wires do = not form a eutectic at the joint, and you only get a 'mechanical' = connection anyway. I found I had to use additional acid to get the = solder to wet out on these wires - risk of corrosion in the future. If I = were doing that one over, I'd toss that connector and get a new one with = the plated crimp-on pins. Any seconds to that motion (Tracy needs a little more pressure; don't = ya think :) Al ------=_NextPart_000_0084_01C56238.CF3EB0D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Al,
I second your motion on the crimped=20 connectors.  I replaced the solder type connector that came with my = EC-2=20 with the crimped pin type.  Much easier, faster and I feel more = reliable=20 than a soldered connection.  SteinAir.com has a D Sub crimping = tool=20 for $31.  I would add that there are 2 basic types of pins, one is = formed=20 from sheet metal, the other is milled from stock.  The Aeroelectric = and=20 Steinair tools are for the milled type.
Joe
----- Original Message -----
From:=20 Al = Gietzen=20
Sent: Thursday, May 26, 2005 = 12:20=20 PM
Subject: [FlyRotary] D-sub = connectors -=20 Prewired cables

 

One thing to consider is that with a canard = pusher you=20 can't get a prewired

harness installed easily because the plugs = won't go=20 down the electrical

conduit. A harness could be installed during = the=20 fuselage construction, but

once the fuselage is built you either have = to run the=20 harness another way,

add a connector, or snip and resolder all = the=20 wires.

 

One easy = solution=20 is to use the gold plated, machined crimp-on d-sub pins.  Put all = the=20 pins on, but pull the wire bundle to where it goes before snapping the = pins=20 into the connector.

 

After = doing all my=20 avionics and EFIS plugs with the gold plated crimp-on D-subs, I got to = love=20 them.  Quick easy, and with the special D-sub crimp tool; very = secure=20 connections. Snap them into the connector after making and checking = the=20 crimp.

 

I=92m = recommending=20 that Tracy go=20 that route.  Yeah, it takes a good tool ($44 t Aeroelectric http://www.bandc.biz/cgi-bin/ez-catalog/cat_display.cgi?9X358218#R= CT-3) =20 I believe in soldered connections for all critical leads that carry = much=20 current, but the risks involved in soldering those little = solder-socket d-subs=20 that are already in the connector =96 I don=92t think so. =

 

 It = is=20 especially important on the EM2 P-1 connector because the TC wire does = not=20 solder well.  Tinned copper works OK, but the TC wires do not = form a=20 eutectic at the joint, and you only get a =91mechanical=92 connection = anyway. I=20 found I had to use additional acid to get the solder to wet out on = these wires=20 =96 risk of corrosion in the future. If I were doing that one over, = I=92d toss=20 that connector and get a new one with the plated crimp-on=20 pins.

 

Any = seconds to=20 that motion (Tracy=20 needs a little more pressure; don=92t ya think :)

 

Al

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