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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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 Posted: Mon Nov 01, 2010 7:07 pm Post subject: Knife blade connectors |
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Heard recently an allegation that this type of connector may no longer
be allowed on certified aircraft. Old wives tale or is there some
substance? I've learned to take 43-13 with a grain of salt, so figured
would ask the experts first.
Kelly
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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
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Neal.George(at)hurlburt.a
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| Posted: Tue Nov 02, 2010 4:23 am Post subject: Knife blade connectors |
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News to me, Kelly,
Where'd you hear that?
neal
=============
<kellym(at)aviating.com>
Heard recently an allegation that this type of connector may no longer
be allowed on certified aircraft. Old wives tale or is there some
substance? I've learned to take 43-13 with a grain of salt, so figured
would ask the experts first.
Kelly
--
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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| Posted: Tue Nov 02, 2010 4:50 am Post subject: Knife blade connectors |
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Another mail list, attributed to old crusty A&P/IA. I like those old
connectors, so wanted to be sure it was not based in anything official.
On 11/2/2010 5:17 AM, George, Neal E Capt USAF ACC 505 TRS/DOJ wrote:
| Quote: | News to me, Kelly,
Where'd you hear that?
neal
=============
<kellym(at)aviating.com>
Heard recently an allegation that this type of connector may no longer
be allowed on certified aircraft. Old wives tale or is there some
substance? I've learned to take 43-13 with a grain of salt, so figured
would ask the experts first.
Kelly
|
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http://www.matronics.com/Navigator?AeroElectric-List |
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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD |
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nuckolls.bob(at)aeroelect
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| Posted: Tue Nov 02, 2010 10:16 am Post subject: Knife blade connectors |
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At 10:01 PM 11/1/2010, you wrote:
| Quote: | --> AeroElectric-List message posted by: Kelly McMullen <kellym(at)aviating.com>
Heard recently an allegation that this type of connector may no longer be allowed on certified aircraft. Old wives tale or is there some substance? I've learned to take 43-13 with a grain of salt, so figured would ask the experts first. |
There's a lot of confusion between what is "allowed" and
that which is no longer "common practice". As a general rule,
the folks-who-know-more-about-airplanes-than-we-do
will not indulge themselves in bans on specific products
unless they're involved in a safety of flight issue.
We've always had an interest in fabricating one-wire,
'serviceable' splices in certain wires. If one wanted
to avoid installing a one-pin connector, then some form
of breakable splice was called for. For the three weeks
I spent on the Cessna 310/320 assembly line, I installed
a bucket-full of "wrist-locks" . . .
[img]cid:.0[/img]
In other venues, the knife-splice was favored . . .
[img]cid:.1[/img]
Both technologies were covered with an insulating sleeve
secured in the center with a tie of string. Today, one might
use heat-shrink. Both technologies offer a tug-resistant
splice with good integrity.
When I left Hawker-Beech, these technologies had been replaced
in production for many years. Powers that be favored a line
of one-pin connectors. These were plastic housings with a
double-ended female connector molded in. A splice as achieved
by crimping the appropriate male pin on both wires and
seating them into the double-female housing.
It was fairly compact, used tools and pins commonly used
all over the airplane . . . and could be opened by simply
extracting one of the two pins with the appropriate tool.
MUCH more expensive for materials . . . a toss-up I think
for labor . . . but it IS the latest and greatest.
In the mean time, there's nothing 'wrong' with knife-
spices or wrist-locks if they meet your design goals.
Bob . . .
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