In the past,
you've seen Grant teach you how to make a rope maker,
and how to make a few types of DIY rope.
Well today, we are going to test those kinds of rope.
We're going to see how much weight they can take
before they break.
[Music]
Guys, you've seen Grant make rope before.
You've even learned
how to make a rope maker from him, and today,
we're going to put that to the test.
This one is made from cord.
We've also got some sisal twine,
and finally, a rope made out of soda bottles.
So to test these types of ropes,
we can't just say, oh, we pulled this hard
until it snaps.
So, we've got an industrial scale.
It's a crane scale.
We're going to secure the rope
in between this scale and a truck,
and then start driving away.
We're going to film this screen, and see how high it gets right
before the rope gives out.
Maybe the ropes will snap.
Maybe the ropes will stretch to the point
where they're not securing anything anymore.
We just want to see how high the scale gets
before that happens.
That should tell us how strong our rope is.
48.
40-- 50.
You hit 50.
Almost 51.
[Music]
43.
43 pounds, not bad.
Okay, you got like 10 pounds on me.
Here's the basic idea.
We're going to take three kinds
of DIY rope that Grant has shown you in the past,
and we're going to put them on a powerful scale,
and pull on them with a truck
to see how long they last before they snap.
[Music]
Almost 60.
Okay.
So our powers combined doesn't do much.
Once we've made some rope that we can hold onto,
I think we'll be able to do a lot more than that.
Yeah.
The problem right now is that it's less about strength,
and more about what your fingers can take.
[Music]
We've made all of our types of rope.
We've got them out here,
and we've got two big old trucks,
and we're gonna pull them and see what happens to them.
First off, best bet,
which one do you think is gonna be strongest?
I kind of think that the the triple braided
sisal rope is going to be the strongest.
I agree.
Yeah.
I think the Mason twine is actually going to be stretchier,
but the sisal twine is going to be a lot of stronger.
All right, so we have a single piece of the sisal,
a single piece of the Mason twine,
then for both of those,
we've got three twists braided together,
which is actually six strands,
because it's three times going there and back,
and then we have three of those twisted together,
as well as the soda bottle rope that Grant made,
and we're going to test all of them.
Just want to point out,
we've made a quick modification to our scale.
You can't really see too well what's going on necessarily,
but this is a GoPro that's just facing the numbers,
and we don't know.
This might twist or something as we're pulling on it,
and this way,
the GoPro is sort of locked in place.
It's always facing the screen.
We should always be able to see what's on the screen.
It's filming at a high frame rate,
so right before the rope breaks,
we should see the maximum pull strength that it gets to.
First up is the single strand of Mason line.
We'll see what it gets to.
I bet that immediately just flips.
Oh, yeah.
[Music]
All right, you're starting to lift.
Hey, it lifted it up.
All right, you can add a little bit more tension.
[Music]
Camera's spinning around like crazy.
Done.
I think it did actually break at the knot.
Doesn't matter how strong your rope it is
if the knot can't take it.
Most of the time
you're not going to just have two plates squishing down
on top of your rope as you pull away.
So that should be our first one.
Yep.
Let's move on to the sisal.
[Music]
It's lifting.
It broke.
So that broke very quickly.
I'm interested to see what that got to.
All right.
So we tested our individual strands.
Next is our three strand rope,
and we're going with the sisal twine this time,
because we think it's going to break faster just
after that initial tests.
So these little u-shaped brackets,
they tightened down quite a bit.
This is what we're going to be using for everything,
other than the single strands,
just because we don't have to tie knots this way.
We've got liftoff.
Better than the last one.
[Music]
Stop.
[Music]
This wasn't as tight as I was hoping it would,
but it's still snapped the twine.
Yeah.
So, I think it was a good result.
We'll see once we get to the bigger ropes,
but now I'm banking on the Mason twine.
That's lit.
[Music]
It is lifting.
[Music]
It is stretching.
[Music]
Keep going.
[Music]
Huh?
So it's actually putting...
>> Stop! >> pressure?
I'm not sure what failed.
I think it was just the rope.
This looks very broken.
Yeah.
Now that I would say definitely at a much higher strength.
So using these little you bracket shape pieces,
one of them is now missing.
Because I think
when the rope broke, it kind of got launched somewhere,
and we haven't yet found where that somewhere is.
[Music]
I got it.
No more rope attached though.
[Music]
I don't think it needs much interaction,
but I'm going to back up more because...
I don't want to snap and hit you.
Now, we started launching metal pieces.
[Music]
It is lifting.
[Music]
It is stretching.
I hate this.
It is broken.
It broke.
Sure enough.
It just keep breaking near where we're putting tension on it.
But..
That is extremely common.
Most cords, ropes,
tethers will break where you have a knot,
just because it's being pinched.
There's extra pressure right there.
I still think we're getting good data.
All right, time for what we assume to be our strongest.
[Music]
We have liftoff.
Stretching.
Stretching more.
Broke.
Nice.
Holy cow.
This stuff is crazy strong.
So I think these two broke,
and then this one stayed on, and just kept stretching,
and then it broke as well.
Yeah.
All right.
I think this is our strongest one,
but we still got one more to test.
We do.
We have our soda bottle rope,
and I don't know much about the strength
of the soda bottle rope.
But we want to know.
I believe Grant hung from the soda bottle rope.
So that's some amount of weight.
That's an indication, but it's not an exact number.
So now we want to get an exact number.
[Music]
I do think it'll break,
but I think it will stretch a lot
before it breaks.
All right, let's find out.
[Music]
Lifting.
Stretching.
Wow.
Stretching.
Holy cow!
Broken.
[Music]
Looks like we just had one,
one of our little ropes doing all the work here.
One broke last.
Yeah.
Same thing that happen with the other one.
Like two of them broke,
and then it stretched a little bit more,
and then it broke more.
Very cool.
Let's take a look at our results.
All right, reviewing footage.
First up, the string.
The Mason twine, one strand of it.
I think it reached five pounds.
[Music]
Wow.
[Music]
It can pull more weight than I can pull just with the,
the two bars together.
41-40--.
Oh, it hit 49.
That was a 49.
48 to 49.
49.
Yeah.
>> 49 and then... >> In just a second.
All right, do you think this one pulled more or less?
I'm thinking way less.
Well, remember how quick it snaps.
Yeah.
It broke.
It didn't--
>> It didn't even get completely-- >> Didn't even get tight, yeah.
9.
It hit 9, 10.
Oh yeah.
It's breaks at 10.
The 10 flashed up there.
I don't think it's always that weak.
I think we had like a weak spot.
So it's that--
It's made from fibers.
Just these super thin fibers twisted together.
Overall, it's decently strong,
but there are sometimes weak points.
And I think,
we maybe had a knot tied on a weak point,
because ten pounds is pretty little.
It did obviously break without even pulling the line tight.
So, it might have really just been 10 pounds on it.
This is the sisal rope, the six strands of it.
Did hold tight, little bit of stretching.
And then snap.
30, 50, 60--
It hit--
Oh.
I think I saw--
Like 130.
139 maybe?
39, 139.
I think it might be switching from 20 to 30 but,
we have one backward 6, 9.
Moving on to the Mason twine.
So six strands of the Mason twine twisted together.
All right, 189.
So 129-139 up to 189 with the Mason twine.
Just one was about 130.
We don't know exactly,
because our scale didn't get perfect reading.
But about 130.
3 times that, do you think's going to be 390?
It's stretching.
Oh, but this--
It's just slide, and snap.
The slide is what's interesting on this one.
>> Oh, I think that's-- >> 299.
That hit 299.
Yeah, I think we're at 293 there.
Yeah, that's 293.
All right, so not three times as much.
Almost up to 300 pounds.
Those points where it's binding together,
where it's actually being attached, those are going
to be a little bit weaker.
So it's not fully as strong as three times the strength of one,
but it's quite a bit stronger.
It's more than double.
For a homemade rope out of twine...
300 pounds is,
you can be able to move a lot of stuff at 300 pounds.
Yeah.
You're getting a good strong rope.
So stretchy.
Oh my goodness.
Stretching more.
Broke.
Nice.
I remember, two of them broke first,
and there just ones stretched out--
Just holding on.
Just stretching a lot.
What'd you get?
But before,
when the first one broke, we had a high point
of like 390 in there, I think.
I think it's that...
389.
Almost 300,
and then almost 400 for the Mason twine.
Not quite there.
But not bad.
It's pretty serious rope.
And now we've got one left, the soda bottle.
Where you think the soda bottle rope opens up?
I don't even know where to begin to guess on this one.
Lifting.
That's so stretchy.
Oh my goodness.
Just goes out of frame.
Stretching.
Wow.
I was kidding, but it does.
Broken.
Oh, it stretched a ton.
Wow.
Down.
No way.
That's it.
Like 440--
The soda bottle rope is our strongest rope.
That's soda bottles.
It was thicker.
It was still a lot thicker too.
But it doesn't matter.
That's, that's volume, not mass.
That's crazy.
I did not think the soda bottle rope would be that strong.
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