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CHECK YOUR LINES!

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CHECK YOUR LINES!

Post  roddie on Thu Mar 06, 2014 7:12 pm

Look what I found!  affraid affraid affraid Probably not too common... but this handle had never been used! Luckily I was examining the ends to see how they were done, while making up a shorter set for my Speed contest model.

This could have wrecked an airplane...

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Re: CHECK YOUR LINES!

Post  Cribbs74 on Thu Mar 06, 2014 9:18 pm

What size is that line? It looks very large for that sleeve.

Good catch.
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Re: CHECK YOUR LINES!

Post  daddyo on Thu Mar 06, 2014 10:22 pm

Good eye
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Re: CHECK YOUR LINES!

Post  roddie on Thu Mar 06, 2014 11:10 pm

Cribbs74 wrote:What size is that line? It looks very large for that sleeve.

Good catch.

Ron, The line is .032" and the sleeve is 1/8" o.d. standard Brass tubing. It looks to be a defective seam by the way it's split. I replaced the sleeve with some K & S 1/8" o.d. Brass tubing that I had. I searched K & S to see if their tubing is listed as "seamless"... it does not state that it is.

I thought the spool of line that I have was a smaller diameter, but it's the same. I made up a shorter set of leads to use with the narrow spacing.

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Re: CHECK YOUR LINES!

Post  Cribbs74 on Thu Mar 06, 2014 11:13 pm

Excellent crimps on that handle!
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Re: CHECK YOUR LINES!

Post  Cajun66 on Sat Mar 08, 2014 6:54 pm

I know it's overkill, but all mine get soldered. I'm a bit paranoid.
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Re: CHECK YOUR LINES!

Post  Cribbs74 on Sat Mar 08, 2014 8:10 pm

You probobly don't want to hear this, but solder is bad.

The solder makes the cable hard and does not allow it to flex as it should. Over time it will cause the cable to snap. Also solder flux can be corrosive and eat away the cable even if you don't see it.

Crimps or wire wrap is the way to go. I like wire wraps, but crimps are much quicker.
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Re: CHECK YOUR LINES!

Post  RknRusty on Sat Mar 08, 2014 8:29 pm

Cribbs74 wrote:You probobly don't want to hear this, but solder is bad.

The solder makes the cable hard and does not allow it to flex as it should. Over time it will cause the cable to snap. Also solder flux can be corrosive and eat away the cable even if you don't see it.

Crimps or wire wrap is the way to go. I like wire wraps, but crimps are much quicker.
I typed a similar reply a while ago, and then didn't want to be the voice of doom, so decided not to post it. The AMA quit recommending solder some years ago for that reason.
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Re: CHECK YOUR LINES!

Post  pkrankow on Sat Mar 08, 2014 8:40 pm

Wire wraps with adhesive lined heat shrink or hot glue and regular heat shrink is awesome! Time consuming is right though.

I use crimps typically.

Phil
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Re: CHECK YOUR LINES!

Post  Cribbs74 on Sat Mar 08, 2014 8:42 pm

I was thinking the same thing Rusty. Then I figured it would be more helpful if it ended up saving a model.

I sure hope I am not coming off as a "know it all" because I am anything but. Truth be told it wasn't that long ago that I was soldering my leadouts as well.

Ron
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Re: CHECK YOUR LINES!

Post  pkrankow on Sat Mar 08, 2014 9:02 pm

Cribbs74 wrote: Truth be told it wasn't that long ago that I was soldering my leadouts as well.

Ron

Same here.

It was in the 2012-2013 AMA rule book as an acceptable practice, as it has been for as long as I am aware. Heat shrink and hot glue is much easier though.

Phil
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Re: CHECK YOUR LINES!

Post  Cribbs74 on Sat Mar 08, 2014 9:40 pm

I usually epoxy my wraps, but heat shrink is a good idea as well.
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Re: CHECK YOUR LINES!

Post  RknRusty on Sat Mar 08, 2014 11:56 pm

Cribbs74 wrote:I usually epoxy my wraps, but heat shrink is a good idea as well.
Epoxy is good, but shrink tube can trap moisture and hide its affects.

What do y'all clean your lines with? I use acetone on a paper towel, before and after. It vaporizes instantly. Around here, alcohol will leave a trail of water everywhere it touches. I have to dry droplets off of my wings after cleaning with alcohol.
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Re: CHECK YOUR LINES!

Post  Cribbs74 on Sun Mar 09, 2014 8:18 am

Clean lines? What's that?

Umm, maybe I should start doing that.
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Re: CHECK YOUR LINES!

Post  JPvelo on Sun Mar 09, 2014 8:27 am

Water droplets, what's that?
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Re: CHECK YOUR LINES!

Post  RknRusty on Sun Mar 09, 2014 8:56 am

JPvelo wrote:Water droplets, what's that?
You dang Arid-zonians!

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Re: CHECK YOUR LINES!

Post  Cajun66 on Sun Mar 09, 2014 9:51 am

Cribbs74 wrote:You probobly don't want to hear this, but solder is bad.

The solder makes the cable hard and does not allow it to flex as it should. Over time it will cause the cable to snap. Also solder flux can be corrosive and eat away the cable even if you don't see it.

Crimps or wire wrap is the way to go. I like wire wraps, but crimps are much quicker.

Weather I wanted to hear it or not, I glad I got the info. I'm going to cut the ends off and replace them. I'll be making a point to do a visual insp and not assume they're good to go.
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Re: CHECK YOUR LINES!

Post  Cribbs74 on Sun Mar 09, 2014 10:19 am

I usually inspect lines when I run them out before the first flight. It's probably not a bad idea to do it more often or clean them as Rusty suggested. I should probably put a little more effort into it seeing as they are so important.
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Re: CHECK YOUR LINES!

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