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Building Tips and technical articles. => ARF'S => Topic started by: Bill Little on August 05, 2012, 03:15:12 PM
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HI All,
Just wanting to hear experiences with using the Strega ARC BC and crimped lead outs as they come from the factory? I would rather not cut up a lot to change them out unless there is a failure rate to the stock ones.
Thanks!
Bill
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Hi Bill,
I had an ARF Cardinal on which i left the original crimped lead outs and never had a problem on over 200 or so flights. I only hope they continue to hold out for the guy I sold it to
Cheers
Al
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Big Bear, I thought you would know better. Yes you can slap my hans if you want. I would only use crimped lines/leadouts only as a last resort. I know the combat guys use them a lot, but how long do their planes last. All my ARF/ARC's had the crimping replaced. Used to wrap my lines/leadouts, but since Carl Schoupe put me onto the swagging method I may never go back. I can make a set of lines in a fourth the time it takes to wrap. I also do a pull test on them that the judges would fall over if they had to do it. Think in excess of 100 pound pull test. H^^
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Right on, Doc!
There are a lot of ways to spell the process - the one I learned about 50 years ago was "swaging" - the process of forming a softer outer metal so it conforms to material passing through it.
Carl's swaging pliers can produce a crimp that forces the aluminum or soft copper outer tube into the steel wires making up our usual 7-strand cable flying lines. NOTE: per AMA Rules, swaging ends for steel single-strand line is NOT allowed...
His package stresses developing a gradual, smooth crimp, evenly formed around the swaged section, and it takes a dozen or so gentle squeeezes, turning the section some in the pliers' jaws, to accomplish. Not only holds very well, but looks very neat and proper.
A "factory" crimp is usually only a few squeezes with round jaw needle-nose pliers. Carl's tool forms a much greater area, with more uniform result.
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<= Lost a tutor II ARF n1 when a crimped lead out broke at the bellcrank. <=
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I lost a custom profile quite a few years ago when one leadout fatigued at the wrapped termination.
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I can swage cable down to 1/16" (.0625) using the equiment at Home Depot. It's good for control handles. You just buy the cable & swages and use their tool in the store.
Where do you get swages for .018, .021, .024, and .027"
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I lost a custom profile quite a few years ago when one leadout fatigued at the wrapped termination.
Of course you did, Phil. ::)
Chris...
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I've been using nylon coated salt water fishing leader for cable leadouts. There are separate packages of tubes to swage or crimp for each size leader. Works fine for me.
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Bellcrank removed with minimal surgery. Hopefully no further surgery to reinstall the BC.
I just couldn't bring myself to trust it on a .60 powered stunter............
BIG Bear
RNMM/AMM