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Michel
Joined: 10 Jan 2006
Posts: 966
Location: Norway
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 Posted: Wed Aug 15, 2007 10:15 am Post subject: Kitfox-List: ALERT! ANYONE FLYING AEROCET 1100 FLOATS!! |
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On Aug 15, 2007, at 6:03 PM, Paul Seehafer wrote:
| Quote: | You will need a nicopress go/no-go gauge to be able to tell if they
are good or not (a $6 tool).
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I don't want to sound arrogant or patronising but ... as a sailor I
would never trust Nicopress to support anything aboard. All sailing
rigs use a conical terminal device to end the stays. The more you pull
on the stay, the more it tightens. Of course, those are a tad more
expensive than Nicopress but ... safety first, isn't it?
Yes, I know, I have Nicopress on the wires of my rudder but the force
it must sustain is minimal compare to floats.
In any case, I am glad it went well for you, Paul. And thank you for
letting the word out. While I don't have floats, it's nice to know that
we have this list to report our problem because learning from others'
experience is the best way to safe flying.
Cheers,
Michel Verheughe
Norway
Kitfox 3 - Jabiru 2200
do not archive
PS: An alternative to Nicopress is simply the good old wire spicing.
Not easy if you haven't done it before but maybe a sailmaker can help
you there. A nice splicing dressed with e.g. self-bounding rubber tape.
But the best is the conical terminal because you avoid to make a bend
in the cable around the eyelet. Here is an example:
http://www.bosunsupplies.com/QuickAttachInstruction.cfm
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Kitfox 3 - Jabiru 2200 |
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Guy Buchanan
Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA
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| Posted: Wed Aug 15, 2007 10:19 am Post subject: Kitfox-List: ALERT! ANYONE FLYING AEROCET 1100 FLOATS!! |
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At 09:03 AM 8/15/2007, you wrote:
| Quote: | Recently I had two of the cross brace cables fail on my Aerocet
floats because the nicopress sleeves slipped on the cable, caused by
not being crimped properly when manufactured.
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Paul,
Thanks for the pictures, without them your diagnosis would
have been wrong and you would have had more failures. Your nico
sleeve failed because it was on 1x19 wire. Nico sleeves are intended
solely for 7x19 wire and should NEVER be used on 1x19! (Yes, that's
CAPITAL N - NEVER! Some people try two sleeves on 1x19, thinking that
will work. DON'T DO IT! You can also use them on 7x7, but you
shouldn't be using 7x7 for structural applications anyway.) ANY
STRUCTURAL 1X19 WIRE TERMINATED WITH NICO SLEEVES SHOULD BE
IMMEDIATELY REPLACED BY 1X19 WITH SWAGED AIRCRAFT FITTINGS.
If you require references I'll dig them up, but I know this
well, having worked in yacht rigging and design for 20 years. I also
can't tell you, off the top of my head, what fraction of the wire's
capability a 1x19 nico will carry, since we never did it; but I saw
many failures, mostly Hobie cat rigs.
Now I know this is going to require some work on your part,
since your tabs may not provide enough clearance for the air-fork
clevis, but please take the time to do it right. And please spread
the word. If your hardware came from Aerocet, you might let them know
that they have taken on excess liability in this regard.
Guy Buchanan
San Diego, CA
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too. |
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