nuckolls.bob(at)aeroelect
Guest
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 Posted: Fri Dec 12, 2008 6:35 am Post subject: Crimping of machined D-sub pins |
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At 07:05 AM 12/12/2008, you wrote:
| Quote: |
<andrewbutler(at)ireland.com>
Good stuff indeed.
Now only last week I installed my Ray Allen elevator trim and
attached the AWG24 to AWG22 using D-SUB PINS. One of the AWG 24
wires did indeed disconnect, and I incorrectly (thanks guys) assumed
that I hadn't crimped it right. I redid it and gave all the pins
tug. They stuck fast. Now I know I was lucky.
Next I joined up the MALE FEMALE D-SUB pins and covered each
connection in heatshrink. Then I bundled the lot together and
covered with a single larger piece of heat shrink.
I installed the trim assembly with the heatshrinked bundle poking
through the bushing in the elevator spar. Nice job done (I thought).
Do I need to redo it?
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What is the risk of having the trim actuator fail
to function? It's probably not a big deal in terms of
getting the airplane back on the ground without
breaking a sweat.
What's the cost of ownership issue for having to
fix it at a later date versus doing something about
it now?
Any offer by me or anyone else to assess risk will
be based on magnitudes pulled from where the sun
don't shine. I'll suggest it's a matter of personal
choice taking into consideration that the technology
used was misapplied to the task (too small wire for
a 22/20AWG pin).
| Quote: | If so, why? i.e. what are the realistic failure modes that the AWG24
side of the connections might contibute to, in this case, given that
I tested each crimp and each one has two layers of heat shrink
holding them together?
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Here's an alternative for joining those (at)$(at)#$(at)# 24AWG
conductors to ship's wiring.
http://www.aeroelectric.com/articles/macservo/macservo.html
There are other connector technologies that would work
just as well.
Bob . . .
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