Today's Message Index:
----------------------
1. 03:19 AM - Re: Re: wire squash connections (Bill Bradburry)
2. 06:50 AM - wire squash connections (Roger)
3. 08:53 AM - Re: wire squash connections (David)
4. 01:01 PM - Re: wire squash connections (Robert L. Nuckolls, III)
5. 04:27 PM - Hydraulic crimper (Richard Girard)
6. 05:02 PM - Re: wire squash connections (David)
7. 08:34 PM - Re: Hydraulic crimper (Robert L. Nuckolls, III)
8. 10:21 PM - Re: Hydraulic crimper (MLWynn@aol.com)
Message 1
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| Subject: | Re: wire squash connections |
If it is an experimental plane, put some on if you want.
Bill B
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Don
Sent: Thursday, February 03, 2011 12:53 AM
Subject: RE: AeroElectric-List: Re: wire squash connections
Bob I use them on my P-MAGS. Like Bob N says these will not form gas tight
connections in screw down devices, but they do provide a fairly lagre
contact area and they keep the wire from being stressed. I check mine every
condition inspection. So far I have not needed to replace any wires but it
will be easy when the time comes. I wish that the P_MAGS came with D-SUB
connectors, but I am not holding my breath. Don
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Bob
Marshall
Sent: Wednesday, February 02, 2011 9:32 PM
Subject: AeroElectric-List: Re: wire squash connections
<marshall6916@sbcglobal.net>
Great suggestions, thanks everyone!! I think I will order the ferrules from
Altech though they come in packs of 100. If I do order, does anyone want a
few?
My thinking is that the ferrules will do as advertised and prevent strand
breaks and maybe a bit of oxidation, too. Just seems like a better
connection.
--------
RV-6A construction resumed. Planning electrical and building wing.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=329418#329418
Message 2
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| Subject: | wire squash connections |
>>If contact area is the issue, how about crimp on male spade? Lots of
>>contact area for the screw to mash into. It has a crimp onto the wire and
>>a crimp onto the insulation. Add some heat shrink tubing for strain
>>relief and support the wire.
>
> I like the pins better . . . or simply
> the combed strands.
>
>
> Bob . . .
Where I used to work we used a similar terminal in one of our
devices. We used a crimp on pin on the end of the wires before insertion.
This made for a nice looking finished job, But unless the assembly tech
really torqued the screws down very tight, they would tend to loosen.
Roger
Message 3
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| Subject: | Re: wire squash connections |
Bob, can you tell if the Labjack U12, www.labjack.com/U12 , is
suitable? I had no idea that termination was such a concern. I've had
the U12 for several years and hope to use it in my Mustang II
(Mustang2.) It was only $100 at the time I bought it as well. If I
need to get the dataq part, so be it, but it doesn't has have as many
capabilities as the Labjack.
Thanks,
David M.
Robert L. Nuckolls, III wrote:
> At 10:26 AM 2/2/2011, you wrote:
>>
>> Bob,
>>
>> Interesting. I plan to put a pair of P-Mags on the Lycoming for my
>> Toot.
>>
>> Rather than bare wires under a screw, I'd think about crimping a
>> suitably sized ring terminal onto the wire with proper shrink tube
>> and placing the ring under the screw along with a lock washer.
>>
>> Others, please chime in if there's an error in my thinking as it's
>> info I'll eventually need.
>
> Just so we're all on the same page . . .
>
> The twist-n-squash terminal strips featured in this
> thread are probably the best there is for taking
> wires to etched circuit boards with convenience,
> minimum cost and reliability . . . UNDER CERTAIN
> CONDITIONS. Here's one example of the technology:
>
> Emacs!
>
> Here's one of my favorite $100 data acquisition modules that
> uses the same terminal strip.
>
> Emacs!
>
> Note that the bared end of a wire is NOT captured by
> a head of the mash-screw . . .
>
> Emacs!
>
> But by the END of the mash-screw. Further, there is a buffer
> strip between the wire strands and the end of the screw. If one
> REALLY needs to use a twist-n-squash technology, this is one of
> the best.
>
> Legacy design goals for aviation (and other disciplines)
> have adopted processes that offer gas-tightness in the
> metallic joints of the current carrying pathway along
> with wire support immediately adjacent to the gas-tight
> joint that prevents failure of the wire under vibration.
>
> Without getting in too much of a dither about new design
> goals, I think the best application of this process calls
> for parallel strands of wire pressed into the lower
> concave surface of the cavity with force from above
> offered by the screw. Then supply bundle support within
> a couple inches of the squash-joints.
>
> Note that is NOT what I did on this particular example . . .
> but then this DAM isn't expected to be in place and
> functioning after what we hope is decades of otherwise
> unattended service.
>
> Bob . . .
>
--
If you're an American, just say NO to the Obamanation, to socialism, and get rid
of Soros.
Message 4
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| Subject: | Re: wire squash connections |
At 11:45 AM 2/3/2011, you wrote:
>
>Bob, can you tell if the Labjack U12, www.labjack.com/U12 , is
>suitable? I had no idea that termination was such a concern. I've
>had the U12 for several years and hope to use it in my Mustang II
>(Mustang2.) It was only $100 at the time I bought it as well.
Suitable for what task? How do you intend to use
the device and what effects might failure of the
device have on the outcome of any given flight.
I believe the U12 is available as a bare-foot board
assembly that has no i/o terminal strip or housing.
You can solder your own i/o termination technology
to the board. But even so, you need to think through
the FMEA for having this board fail to accomplish
any given task.
If I need to get the dataq part, so be it, but it doesn't has have as
many capabilities as the Labjack.
The DataQ device has the SAME terminal strips. The
pictures showed how I reduced the inconvenience of
of those strips with a D-sub connection adaptation . . .
but the strips are still there.
Unless you're using this board to develop feedback
data for an autopilot or fuel injection system,
then I suspect that failure to perform is nothing
worse than a maintenance event. EITHER product will
offer good value.
Bob . . .
Message 5
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| Subject: | Hydraulic crimper |
It's Harbor Freight so the usual caveats, and at $60 it might be a bit much
just to make one set of battery cables but an EAA chapter or a group of
builders might find it affordable.
http://tinyurl.com/47aqbyd
*
*
Rick Girard
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
Message 6
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| Subject: | Re: wire squash connections |
My purposes for this unit are pressures (turbo (3), air(2), water, and
oil), misc switches, and possibly duct placements with the analog outs.
I also intend to use the AMD 494/495 chips with thermocouples for
temps. No system critical functions will be used with this a/d unit.
I intend to use a megasquirt family device for engine controls and rpm
reporting, etc.
Thanks,
David
Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>
> At 11:45 AM 2/3/2011, you wrote:
>>
>> Bob, can you tell if the Labjack U12, www.labjack.com/U12 , is
>> suitable? I had no idea that termination was such a concern. I've
>> had the U12 for several years and hope to use it in my Mustang II
>> (Mustang2.) It was only $100 at the time I bought it as well.
>
> Suitable for what task? How do you intend to use
> the device and what effects might failure of the
> device have on the outcome of any given flight.
>
> I believe the U12 is available as a bare-foot board
> assembly that has no i/o terminal strip or housing.
> You can solder your own i/o termination technology
> to the board. But even so, you need to think through
> the FMEA for having this board fail to accomplish
> any given task.
>
> If I need to get the dataq part, so be it, but it doesn't has have as
> many capabilities as the Labjack.
>
> The DataQ device has the SAME terminal strips. The
> pictures showed how I reduced the inconvenience of
> of those strips with a D-sub connection adaptation . . .
> but the strips are still there.
>
> Unless you're using this board to develop feedback
> data for an autopilot or fuel injection system,
> then I suspect that failure to perform is nothing
> worse than a maintenance event. EITHER product will
> offer good value.
>
>
> Bob . . .
>
>
--
If you're an American, just say NO to the Obamanation, to socialism, and get rid
of Soros.
Message 7
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| Subject: | Re: Hydraulic crimper |
At 07:18 PM 2/3/2011, you wrote:
>It's Harbor Freight so the usual caveats, and at $60 it might be a
>bit much just to make one set of battery cables but an EAA chapter
>or a group of builders might find it affordable.
>
><http://tinyurl.com/47aqbyd>http://tinyurl.com/47aqbyd
Looks like a 'deal' to me.
Bob . . .
Message 8
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| Subject: | Re: Hydraulic crimper |
I bought one of these and have used it on my heavy cables. Also loaned it
out to friends for automobile as well as aircraft cables. It works really
well. The crimps are easy to control and appear to be quite tight.
Michael Wynn
RV 8 Wiring
San Ramon, CA
In a message dated 2/3/2011 8:35:11 P.M. Pacific Standard Time,
nuckolls.bob@aeroelectric.com writes:
At 07:18 PM 2/3/2011, you wrote:
It's Harbor Freight so the usual caveats, and at $60 it might be a bit
much just to make one set of battery cables but an EAA chapter or a group of
builders might find it affordable.
_http://tinyurl.com/47aqbyd_ (http://tinyurl.com/47aqbyd)
Looks like a 'deal' to me.
Bob . . .
(http://www.matronics.com/Navigator?AeroElectric-List)
(http://www.matronics.com/contribution)
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