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Date: Thu, 12 Oct 2006 08:55:22 -0600
From: Bob White <rlwhite@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Musings on the EM-2 connector P1
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Tried to send this yesterday, but it bounced.  I haven't worked out all the problems of using the internet while traveling.

Hi Bill,

What you are planning will work fine.  I would use a butt crimp connector to transition from the TC wire to the copper.  Mainly because it would be less bulky than the ring connectors.  When I build TC cables I only use the crimp pins just to minimize the number of joints. You are making basically the same transistion a few inches further from the connector.

One thing to keep in mind with these TC measurements is that they are NOT high precision measurements.  If you have a 10 or 20 degree error in your EGT measurement, it's no big deal.  You just want to a consistent reading which means the errors shouldn't vary much as the ambient temperature changes.

Bob W.  (Enjoying a "brisk" day in the north country.)

On Wed, 11 Oct 2006 07:41:27 -0400
"Bill Bradburry" <bbradburry@allvantage.com> wrote:

> I have been slowly building the harnesses for the EC and EM-2.  I now
> have arrived at the P1 connector on the EM-2.  This supplied connector
> is a solder connector to be connected to J and K thermocouple
> wire....Hmmm.  You can not solder this wire....Hmmm.
> I have considered buying a crimp connector, BUT there is going to be a
> transition joint from thermocouple wire to copper at some place inside
> this apparatus no matter what you do.
> So what I am going to do is make up copper jumpers that solder to the
> connector and terminate with crimped ring terminals for connection to
> the thermocouple wires.  The connection will be inside the panel and I
> think will introduce a minimum of error in the system.
> Any comments or a better way to think of this?
> 
> Bill Bradburry
> 
> 
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