Dyneema rope VS steel - Page 2
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  1. #21
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    Quote Originally Posted by Garwood View Post
    In that test, that 3/8 cable must be pretty shitty to break at 14k pounds. Decent 3/8" wire rope shouldn't fail under 20K lbs.
    It sure looked like they designed the "test" so the 3/8 steel twould break before the Dyneema, why else use that kind of clamp, and why 5 of them?

  2. #22
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    This in a great test to failure of 500 metric tons. Bottom of the page, cant link directly to the video URL. Applied Fiber News | Applied Fiber

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    Is this what "synthetic" winch lines are made of that are becoming popular on automotive and ATV winches?

    We recently developed an automated winch drum winding system for production winding of synthetic rope onto drums before they are assembled into complete winch assemblies. They key is that you have to wind it very tight (we designed to wind at 1000 lbs tension). If wound at lower tensions, the rope is so slippery that when placed under sudden tension on a loosely wound drum, it would knife into the layers and then cause a huge mess when trying to spool the rope off the drum to correct.

  5. #24
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    Yes, Motion - this is that stuff, or at least performance-wise the same as whatever you designed for.

    Here's a link to some "Mudders" talking about the product: Why does my 13000 lb Master-Pull winch rope have a 2T WLL hook? | IH8MUD Forum

  6. #25
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    Quote Originally Posted by motion guru View Post
    Is this what "synthetic" winch lines are made of that are becoming popular on automotive and ATV winches?

    We recently developed an automated winch drum winding system for production winding of synthetic rope onto drums before they are assembled into complete winch assemblies. They key is that you have to wind it very tight (we designed to wind at 1000 lbs tension). If wound at lower tensions, the rope is so slippery that when placed under sudden tension on a loosely wound drum, it would knife into the layers and then cause a huge mess when trying to spool the rope off the drum to correct.
    The masterpull stuff was designed to work on winches. Its really dense,it really behaves like steel cable. Im using it on grooved drum on push-pull winches with no overlay but it doesnt squish out.

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    Quote Originally Posted by motion guru View Post
    Is this what "synthetic" winch lines are made of that are becoming popular on automotive and ATV winches?

    We recently developed an automated winch drum winding system for production winding of synthetic rope onto drums before they are assembled into complete winch assemblies. They key is that you have to wind it very tight (we designed to wind at 1000 lbs tension). If wound at lower tensions, the rope is so slippery that when placed under sudden tension on a loosely wound drum, it would knife into the layers and then cause a huge mess when trying to spool the rope off the drum to correct.
    You wanna hear something funny? I scrapped out a production CNC winch drum winding machine last year. It was based on a large transformer coil winding machine with a spool carrier on linear bearings tensioned by air cylinders.

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    They use this stuff in larger sizes for tugboat tow lines too. I picked up a 50' length of 1˝" line that's purple for $40. I looked it up and near as I can tell minimum breaking strength is WELL over 50 tons. I use the length that I have on a 2:1 anchor pulley when pulling trees out with the tractor, compounded by a 5:1 setup that also uses smaller dyneema rope.

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    Quote Originally Posted by lucky7 View Post
    No stretch.
    A friend used to own a rope company in east Palo Alto ... they were one of (or maybe the only) place that made mylar line. Sold most of it to the defense department for towing nets that caught the film dropped from satellites, I was told the advantage to it was no-stretch so it towed more accurately.

    Times have changed a little

    You guys should watch double-braid being made, it's pretty cool.

  10. #29
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    Quote Originally Posted by EmanuelGoldstein View Post
    Sold most of it to the defense department for towing nets that caught the film dropped from satellites, I was told the advantage to it was no-stretch so it towed more accurately.
    Corona, back before it started doing drugs and hanging out in crowds...

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    Quote Originally Posted by Milland View Post
    Corona, back before it started doing drugs and hanging out in crowds...
    Cool, thanks. I'd never seen photos, just heard the description. Didn't match my mental image at all

    Reading about the program, funny, Fred used to say the space biz quit being fun when you didn't have to keep your finger on the destruct button


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