1
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this is a dynamic climbing rope one can

2
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take hundreds of these massive Falls and

3
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it will still provide a soft Landing for

4
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the climber Now Let's ignore the blue

5
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protective shift and pull out the core

6
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so this white strands is the core of the

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Rope which is responsible for majority

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of rope's strength if I would untwist

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the core strand eventually I would get

10
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to this thing which is called a

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multi-filament and if I would dig deeper

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and try to separate the smallest part of

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the Rope I would get to a single

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filament which I can barely see so this

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is a single filament

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so this filament is about 10 times

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thinner than the human hair and there is

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about 50 to 80

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000 of them in a single rope and all of

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them run across entire length of the

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Rope now during the fall this filaments

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stretch but also they slide past each

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other which creates friction and this

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friction helps to dampen the impact

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however if we would make a rope wet

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water on the surface of the filaments

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would act as a lubricant this would

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allow the filaments to slide easier past

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each other which would reduce the

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dampening effect also you can probably

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imagine that as I want to stretch the

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Rope out it needs to shrink in diameter

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however if the Rope is full of water in

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order to shrink in diameter first it

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needs to spit the water out however if

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the impact is hard enough the water

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cannot Escape faster it's like when you

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belly flop on the water and the water

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doesn't have enough time to flow around

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your body and things get even more

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interesting from here if we would look

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deeper deep deep inside the filament we

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would find this but don't worry the only

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00:02:07,799 --> 00:02:09,539
thing you need to know that this is a

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monomer which joins together to form a

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polymer chain and this chain can be very

47
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long very very long which is really

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great for making filament fiber and this

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is where things get interesting notice

50
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that some parts of this fiber are

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arranged neatly in order these parts are

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called crystalline and they have polymer

53
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chains packed so close together that

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they form an attraction for each other

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and this happens because hydrogen from

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one chain really likes the oxygen from

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the other chain so all of this makes

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these parts really strong with which is

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great for the strength of the Rope

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however it also makes these parts really

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stiff which is not so great when you

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want your dynamic rope to stretch and

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that's what these other parts that look

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like spaghettis are four they are called

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amorphous and they have much bigger gaps

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between the chains which allows them to

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stretch

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so when the force is applied on the

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fiber these spaghetti Parts stretch and

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the crystalline Parts provide the

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strength you can probably imagine that a

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very stiff rope

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wouldn't be great for climbing but

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neither the Rope which would stretch too

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much because when I fall I want to land

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not on the ground so by controlling the

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ratio between spaghettis and crystalline

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Parts rope manufacturers can create this

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great strength but at the same time

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perfect Force absorption which is quite

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impressive now remember I said that

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hydrogen really likes the oxygen guess

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what else has a lot of hydrogen and

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oxygen that's right water good news is

85
00:04:00,180 --> 00:04:02,640
that water cannot really penetrate into

86
00:04:02,640 --> 00:04:04,860
the crystalline parts of the fiber

87
00:04:04,860 --> 00:04:07,620
because the chains there are very packed

88
00:04:07,620 --> 00:04:10,620
close together already however spaghetti

89
00:04:10,620 --> 00:04:13,860
Parts have gaps and that allows water to

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00:04:13,860 --> 00:04:16,859
come in and bond to the chains and this

91
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bonding increases the distance between

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the chains and it also weakens the

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intermolecular attraction so now if the

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the force is applied when the fiber is

95
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wet spaghettis might stretch more than

96
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what they are capable to recover from

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and that might damage the entire

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structure of the fiber but all of that

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is in theory so let's see if that theory

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applies to real world climbing

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situations

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[Music]

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and if you're wondering who goes

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climbing in the rain well this was my

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birthday and we came up with a brilliant

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idea to climb 34 routes in a day and

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half of the day was raining

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so yeah let's say I have some wet

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experiences but my anecdotal experiences

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are not science and to do proper science

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I needed to go to the place where the

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ropes are properly tested

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[Music]

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[ __ ] there's a lot coming out

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[Music]

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that's a lot

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and before we begin a strange fact I

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checked a lot of user manuals of dynamic

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climbing ropes from various Brands and

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about half of them have various warnings

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about wet drops however the other half

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doesn't mention anything

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hmm okay so here is the question

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will dry rope cause harder catch on

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realistic fault scenario

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well we would say over time yes in the

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beginning probably not

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so you mean on a first fall maybe not

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yes and on the repeated Falls probably

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yes exactly that's not my first

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statement made

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now since we wanted to mimic real world

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scenarios

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and heartfalls rarely exceed 4

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kilonewtons we needed to modify the drop

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tower to produce the forces between

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three and four kilonewtons

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so we overshoot yes we did buy a lot

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[Music]

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okay

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which took a bit of adjustment on this

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old drop tower Mammoth actually has a

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way more advanced drop tower which I

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already had a pleasure to use when we

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were testing the cut resistance of the

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ropes which was super interesting yeah

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that's easier with the other one because

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it works electronically you can put in

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the number where you want to go and then

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it's aligns it by itself but we are not

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allowed to use it not for the water

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it doesn't like water yeah so this one

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doesn't like the water this one also

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doesn't like weather no as soon as these

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get wet rust will appear off the wall

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and then friction has a big influence on

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the yeah but this one we don't use this

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for any development or production

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control yeah that's why we are allowed

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to make it wet exactly

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4.11

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[Music]

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I've heard you're going like oh

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the frustration

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and not only we needed to make sure that

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our samples are between three and four

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kilonewtons but also that each of them

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is as similar as possible how is it

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going we have a method of how we can

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always make the nuts equal later we will

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have fun

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it's a group activity it's a team

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building yes how many samples do we need

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depends on you how many samples do we

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need

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depends on how many people we have

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making them

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[Music]

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so what's going on equal length is equal

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everything is equal having samples as

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similar as possible was actually really

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important because as Adriana said

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textiles is a very tricky and Moody raw

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material to work with Moody it's very

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moody yes so although we cannot control

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the mood of the Rope but in order to

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make the nice statistics that you're

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gonna see later in this video we needed

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to try our best

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too long so basically we are massaging

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back and forth to get uh yeah it's what

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we in German call it Sisyphus are bite

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no we got it you think so if not it's

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time for lunch

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either we succeed or we eat

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everybody click

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three points

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yeah when I was editing this I thought

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wow if you ever wondered how Geeks are

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celebrating life this is a prime example

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anyway the next question was is our test

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setup repeatable meaning will we get

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00:09:53,820 --> 00:09:56,279
second fall to be close to the first one

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if we don't get that then we five hours

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more

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don't make a night session work till

207
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five and then you go bouldering we have

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00:10:06,959 --> 00:10:08,399
time limit

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00:10:08,399 --> 00:10:10,260
because we need to go bouldering because

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we need to completely

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very nice that's very good very Swiss

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accurate

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our setup was working really well and

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now we needed to collect a lot of data

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this might take if we wait three minutes

216
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and we do five Falls that's 15 minutes

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just waiting times three times six

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fifteen

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00:10:39,920 --> 00:10:43,220
I the eyes are getting bigger and bigger

220
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and here are the results if we average

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all the samples we get the Baseline of

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how the force is increasing with every

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fall which shows that rope doesn't have

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enough time to fully recover so let's

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see what happens when the ropes are wet

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look how much air is coming out

227
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all the air is escaping from the Rope

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during the fall the water will be trying

229
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to escape trying to blast out of Europe

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we wanted to do three different tests

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where the ropes were soaked for 1 5 and

232
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15 minutes and what was interesting that

233
00:11:19,980 --> 00:11:22,560
fully submerging the Rope for just one

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00:11:22,560 --> 00:11:25,380
minute was enough to almost completely

235
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saturate the Rope meaning that soaking

236
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for longer did not add any extra weight

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and after we dropped all the wet samples

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and enjoyed the splashing of the water

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everywhere

240
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[Laughter]

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oh my God

242
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here are the results since the

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difference in water absorption was

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minimal the forces were actually very

245
00:11:51,779 --> 00:11:54,360
similar and if we take the average of

246
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all the wet samples we can see that the

247
00:11:57,240 --> 00:12:00,120
first fall was only slightly harder

248
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however the difference increases with

249
00:12:03,000 --> 00:12:04,860
the subsequent false

250
00:12:04,860 --> 00:12:07,260
you know it's combining everything to

251
00:12:07,260 --> 00:12:11,120
family so statistically significant

252
00:12:11,120 --> 00:12:15,800
very good today we made a page

253
00:12:16,279 --> 00:12:20,339
science a little future me Interruption

254
00:12:20,339 --> 00:12:23,459
since I got more information the peak

255
00:12:23,459 --> 00:12:25,620
forces that we measured obviously do

256
00:12:25,620 --> 00:12:27,779
contribute to how hard the catch will be

257
00:12:27,779 --> 00:12:30,660
for the climber however it's not the

258
00:12:30,660 --> 00:12:32,700
only Factor

259
00:12:32,700 --> 00:12:34,980
the big Force to the climber usually

260
00:12:34,980 --> 00:12:38,220
happens around this moment but even on

261
00:12:38,220 --> 00:12:40,860
the hardest Falls this moment is not

262
00:12:40,860 --> 00:12:43,320
hard enough for the human body to be a

263
00:12:43,320 --> 00:12:46,440
problem what is the problem however is

264
00:12:46,440 --> 00:12:51,079
how hard the climber will hit the wall

265
00:12:51,959 --> 00:12:54,240
as I mentioned earlier as the Rope is

266
00:12:54,240 --> 00:12:56,279
stretching the filaments are rubbing

267
00:12:56,279 --> 00:12:58,680
against each other which dampens the

268
00:12:58,680 --> 00:13:01,019
energy and and if the Rope would be able

269
00:13:01,019 --> 00:13:02,880
to absorb all the energy during the fall

270
00:13:02,880 --> 00:13:06,420
it would stretch and then stop however

271
00:13:06,420 --> 00:13:08,940
that's not what happens on hard Falls

272
00:13:08,940 --> 00:13:11,519
normally the Rope will act like a spring

273
00:13:11,519 --> 00:13:14,760
it will stretch and then bounce back

274
00:13:14,760 --> 00:13:18,060
that bounce back usually creates more

275
00:13:18,060 --> 00:13:20,700
energy going towards the wall and if the

276
00:13:20,700 --> 00:13:22,860
Rope is wet the filaments are sliding

277
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easier past each other which reduces the

278
00:13:25,500 --> 00:13:28,500
dampening effect so the bounce back into

279
00:13:28,500 --> 00:13:31,620
the wall should be harder so I was

280
00:13:31,620 --> 00:13:34,560
really curious to test this however this

281
00:13:34,560 --> 00:13:36,480
requires more advanced testing

282
00:13:36,480 --> 00:13:39,180
facilities but luckily after I left

283
00:13:39,180 --> 00:13:41,100
Mahmoud did this test in another

284
00:13:41,100 --> 00:13:44,100
facility and sent me the results here is

285
00:13:44,100 --> 00:13:46,500
the force graph where the initial Peak

286
00:13:46,500 --> 00:13:49,680
was said to be around 3.6 kilonewtons

287
00:13:49,680 --> 00:13:52,680
and after that we can see how the Rope

288
00:13:52,680 --> 00:13:55,860
bounces couple of times now in the case

289
00:13:55,860 --> 00:13:58,560
of the wet rope the peak is only

290
00:13:58,560 --> 00:14:01,320
slightly higher however the spring

291
00:14:01,320 --> 00:14:05,519
effect is much higher and this is the

292
00:14:05,519 --> 00:14:08,180
same graph after five consecutive Falls

293
00:14:08,180 --> 00:14:12,440
the initial Peak was 23 percent harder

294
00:14:12,440 --> 00:14:16,680
however the bounce was much harder so

295
00:14:16,680 --> 00:14:19,800
the spring effect was much bigger

296
00:14:19,800 --> 00:14:22,740
alright so far we confirmed that wet

297
00:14:22,740 --> 00:14:26,279
robes might cause harder Falls but also

298
00:14:26,279 --> 00:14:29,279
according to the theory wet drops might

299
00:14:29,279 --> 00:14:31,500
lead to some permanent damage to the

300
00:14:31,500 --> 00:14:32,519
Rope

301
00:14:32,519 --> 00:14:35,160
let's see so we left the last rope

302
00:14:35,160 --> 00:14:36,720
hanging overnight

303
00:14:36,720 --> 00:14:40,139
so technically now it's dry and

304
00:14:40,139 --> 00:14:43,320
um and rested

305
00:14:43,320 --> 00:14:46,139
so we dropped this rope once again and

306
00:14:46,139 --> 00:14:49,199
the fall was harder compared to the

307
00:14:49,199 --> 00:14:51,899
Baseline which definitely hints that

308
00:14:51,899 --> 00:14:54,600
there was some permanent damage done to

309
00:14:54,600 --> 00:14:57,720
the Rope alright so far so good and

310
00:14:57,720 --> 00:14:59,940
there was two more experiments I wanted

311
00:14:59,940 --> 00:15:03,060
to make first of all we did all our

312
00:15:03,060 --> 00:15:05,940
tests on classic ropes so I was curious

313
00:15:05,940 --> 00:15:08,760
how dried treated ropes would perform on

314
00:15:08,760 --> 00:15:10,920
the same tests and in case you don't

315
00:15:10,920 --> 00:15:13,199
know dry treated ropes are soaked in

316
00:15:13,199 --> 00:15:16,620
certain chemicals that make them more

317
00:15:16,620 --> 00:15:21,000
water resistant our dry ropes we add the

318
00:15:21,000 --> 00:15:24,060
chemical first to the core so to the

319
00:15:24,060 --> 00:15:26,519
strands they get a drop application then

320
00:15:26,519 --> 00:15:28,980
we braid the rope together and then we

321
00:15:28,980 --> 00:15:31,620
submerge it in a chemical bath and we

322
00:15:31,620 --> 00:15:34,320
take it out and we dry it and then you

323
00:15:34,320 --> 00:15:36,600
have a dry roll so basically core is

324
00:15:36,600 --> 00:15:38,880
separately submerged into chemical and

325
00:15:38,880 --> 00:15:42,060
then entire rope now the cooler get a

326
00:15:42,060 --> 00:15:44,220
drop application you need

327
00:15:44,220 --> 00:15:46,920
just a little drop every every couple

328
00:15:46,920 --> 00:15:50,760
seconds is enough to make it uh water

329
00:15:50,760 --> 00:15:53,040
resistant interesting and then the

330
00:15:53,040 --> 00:15:55,380
entire rope goes into the thing yeah

331
00:15:55,380 --> 00:15:58,019
when it's finished so let's see how good

332
00:15:58,019 --> 00:16:01,500
that treatment is in practice

333
00:16:01,500 --> 00:16:06,120
[Music]

334
00:16:06,120 --> 00:16:08,519
so at first we did a lot of drops

335
00:16:08,519 --> 00:16:11,040
without water and that allowed us to

336
00:16:11,040 --> 00:16:13,680
compare treated tropes with classic ones

337
00:16:13,680 --> 00:16:15,899
and it was good to see that treatment

338
00:16:15,899 --> 00:16:18,899
has no negative effect when the ropes

339
00:16:18,899 --> 00:16:21,600
are dry so let's see if it has a

340
00:16:21,600 --> 00:16:23,639
positive effect when the ropes are wet

341
00:16:23,639 --> 00:16:27,000
number two number two you want to get

342
00:16:27,000 --> 00:16:28,860
the shot of how

343
00:16:28,860 --> 00:16:32,940
treated robes Stone bubble or duvet

344
00:16:32,940 --> 00:16:36,779
bubble wait maybe I don't want to

345
00:16:36,779 --> 00:16:39,180
look it doesn't bubble as much as the

346
00:16:39,180 --> 00:16:40,680
other one

347
00:16:40,680 --> 00:16:43,620
what if you squeeze it a bit but no

348
00:16:43,620 --> 00:16:45,740
squeezing

349
00:16:45,740 --> 00:16:48,720
and yes dry treated ropes absorbed

350
00:16:48,720 --> 00:16:51,079
significantly less water

351
00:16:51,079 --> 00:16:54,779
ah I know what can be the problem that

352
00:16:54,779 --> 00:16:57,899
ends I see bubbles coming from the ends

353
00:16:57,899 --> 00:17:00,000
a little bit although we sealed the ends

354
00:17:00,000 --> 00:17:02,339
but most of the bubbles are coming from

355
00:17:02,339 --> 00:17:04,980
the tip of the Rope maybe I'm gonna keep

356
00:17:04,980 --> 00:17:07,740
that tip just a little bit out

357
00:17:07,740 --> 00:17:09,720
yeah I mean you can always have like

358
00:17:09,720 --> 00:17:12,600
little holes where it could get in with

359
00:17:12,600 --> 00:17:14,819
these kind of things if it's not seared

360
00:17:14,819 --> 00:17:16,559
well in the end you have like a

361
00:17:16,559 --> 00:17:18,600
capillary effect of that the water

362
00:17:18,600 --> 00:17:22,199
traveled along the fiber okay let's see

363
00:17:22,199 --> 00:17:25,100
I'm super curious

364
00:17:25,630 --> 00:17:27,480
[Music]

365
00:17:27,480 --> 00:17:30,780
wow there was no splash of water

366
00:17:30,780 --> 00:17:32,940
and here is the treated rope that we

367
00:17:32,940 --> 00:17:35,700
soaked for 15 minutes as you can see

368
00:17:35,700 --> 00:17:37,919
there is still barely any water coming

369
00:17:37,919 --> 00:17:40,320
out of it and if we would compare this

370
00:17:40,320 --> 00:17:43,200
to the classic ropes the difference is

371
00:17:43,200 --> 00:17:46,039
huge

372
00:17:48,960 --> 00:17:53,160
we're still here collecting the data

373
00:17:53,160 --> 00:17:56,220
Never Ending Story how are we feeling to

374
00:17:56,220 --> 00:17:57,600
you

375
00:17:57,600 --> 00:17:58,380
yeah

376
00:17:58,380 --> 00:18:02,039
here stopped for climbing and when it

377
00:18:02,039 --> 00:18:04,200
comes to the treated tropes soaking them

378
00:18:04,200 --> 00:18:07,260
up to 5 minutes showed no increase in

379
00:18:07,260 --> 00:18:10,140
forces however soaking for 15 minutes

380
00:18:10,140 --> 00:18:13,919
already was worse but not as bad

381
00:18:13,919 --> 00:18:17,160
compared to the classic ropes so dried

382
00:18:17,160 --> 00:18:19,260
treated ropes unsurprisingly were

383
00:18:19,260 --> 00:18:21,120
performing better in wet conditions

384
00:18:21,120 --> 00:18:23,820
however I know that many of you myself

385
00:18:23,820 --> 00:18:27,299
included had a question how long does

386
00:18:27,299 --> 00:18:30,360
dry treatment stay effective does it

387
00:18:30,360 --> 00:18:34,140
wear off so this is a used truck that I

388
00:18:34,140 --> 00:18:37,620
used for about a year actively almost

389
00:18:37,620 --> 00:18:40,140
climbing every second or every third day

390
00:18:40,140 --> 00:18:43,260
so we could get a sample of this

391
00:18:43,260 --> 00:18:45,900
yeah that's it this orange rope that I

392
00:18:45,900 --> 00:18:47,700
brought is actually perfect for our

393
00:18:47,700 --> 00:18:50,039
comparisons because it's exactly the

394
00:18:50,039 --> 00:18:52,440
same rope as the one we already tested

395
00:18:52,440 --> 00:18:55,260
the only difference is the color

396
00:18:55,260 --> 00:18:57,780
at first we did the test without water

397
00:18:57,780 --> 00:19:00,360
so that we could compare how much

398
00:19:00,360 --> 00:19:03,120
stiffer old rope gets compared to the

399
00:19:03,120 --> 00:19:05,460
new one and to my surprise the

400
00:19:05,460 --> 00:19:08,160
difference was very minimal one note

401
00:19:08,160 --> 00:19:10,500
here is that we selected the test sample

402
00:19:10,500 --> 00:19:12,660
from the middle of the rope that part of

403
00:19:12,660 --> 00:19:15,240
the Rope usually is the least damaged

404
00:19:15,240 --> 00:19:17,880
but that's good to know that if your

405
00:19:17,880 --> 00:19:19,620
ends of the Rope are damaged and you

406
00:19:19,620 --> 00:19:21,900
chop them off the rest of the Rope

407
00:19:21,900 --> 00:19:23,660
should perform really well

408
00:19:23,660 --> 00:19:25,679
[Music]

409
00:19:25,679 --> 00:19:27,140
yeah

410
00:19:27,140 --> 00:19:30,660
oh it's bubbling much more than new

411
00:19:30,660 --> 00:19:34,140
ropes yeah and yes old rope absorbed

412
00:19:34,140 --> 00:19:36,780
more water however it still performed

413
00:19:36,780 --> 00:19:38,520
better compared to the classic rope

414
00:19:38,520 --> 00:19:42,120
being new treated rope soaked for five

415
00:19:42,120 --> 00:19:44,220
minutes let's see how it how well it

416
00:19:44,220 --> 00:19:44,650
served

417
00:19:44,650 --> 00:19:47,250
[Laughter]

418
00:19:47,250 --> 00:19:53,249
[Music]

419
00:19:53,580 --> 00:19:56,700
we actually washed the Rope but you can

420
00:19:56,700 --> 00:19:59,580
still see that the water which comes out

421
00:19:59,580 --> 00:20:00,539
of it

422
00:20:00,539 --> 00:20:03,480
is still grayish a little bit

423
00:20:03,480 --> 00:20:06,000
coming out does it hurt so you want to

424
00:20:06,000 --> 00:20:07,520
blend my washing machine

425
00:20:07,520 --> 00:20:10,320
and this is what happened with the wet

426
00:20:10,320 --> 00:20:12,660
old rope the first fall was actually

427
00:20:12,660 --> 00:20:16,140
identical which is very nice and then

428
00:20:16,140 --> 00:20:18,360
the subsequent folds again had an

429
00:20:18,360 --> 00:20:20,520
increase in forces

430
00:20:20,520 --> 00:20:23,400
and if we would compare all wet drops

431
00:20:23,400 --> 00:20:26,100
this is what we get

432
00:20:26,100 --> 00:20:28,380
and the only thing missing here that we

433
00:20:28,380 --> 00:20:31,260
had no time to do would be to test old

434
00:20:31,260 --> 00:20:33,600
classic robes

435
00:20:33,600 --> 00:20:36,960
so yes treated robes do lose their water

436
00:20:36,960 --> 00:20:40,440
repellent magic Over time however they

437
00:20:40,440 --> 00:20:42,360
still perform better compared to the

438
00:20:42,360 --> 00:20:46,140
classic ropes however there is still one

439
00:20:46,140 --> 00:20:48,000
very interesting thing to know let's

440
00:20:48,000 --> 00:20:50,100
look into water absorption graph again

441
00:20:50,100 --> 00:20:52,260
notice that classic crops are almost

442
00:20:52,260 --> 00:20:54,120
fully saturated after five minutes

443
00:20:54,120 --> 00:20:56,880
however treated tropes even after 15

444
00:20:56,880 --> 00:20:59,880
minutes still have a trend up so then

445
00:20:59,880 --> 00:21:01,919
the question is what's the full

446
00:21:01,919 --> 00:21:05,039
saturation point of treated ropes so I

447
00:21:05,039 --> 00:21:07,500
asked Adriana to do these tests and here

448
00:21:07,500 --> 00:21:10,140
are the results turns out that all the

449
00:21:10,140 --> 00:21:12,360
ropes were trending to the same around

450
00:21:12,360 --> 00:21:16,020
40 percent level so that means even if

451
00:21:16,020 --> 00:21:18,179
your rope is dry treated and you put it

452
00:21:18,179 --> 00:21:20,460
under water and you leave it there for

453
00:21:20,460 --> 00:21:21,600
long enough

454
00:21:21,600 --> 00:21:23,700
I don't know why would you do that but

455
00:21:23,700 --> 00:21:26,280
if you would do that eventually all of

456
00:21:26,280 --> 00:21:28,520
these tens of thousands of tiny

457
00:21:28,520 --> 00:21:31,320
filaments in the Rope would act as

458
00:21:31,320 --> 00:21:34,080
capillaries and the water would find its

459
00:21:34,080 --> 00:21:36,679
way in and it would probably perform

460
00:21:36,679 --> 00:21:41,299
similar to the Rope being not treated

461
00:21:43,919 --> 00:21:47,580
now before some of you will become

462
00:21:47,580 --> 00:21:49,799
hydrophobic let me add a couple of

463
00:21:49,799 --> 00:21:52,559
things yes wet ropes are significantly

464
00:21:52,559 --> 00:21:55,020
heavier which sucks when you're climbing

465
00:21:55,020 --> 00:21:57,900
and they might wear down quicker both

466
00:21:57,900 --> 00:22:01,620
from false and from abrasion which sucks

467
00:22:01,620 --> 00:22:04,020
to your wallet also there is a theory

468
00:22:04,020 --> 00:22:07,320
that They are thicker with swell from

469
00:22:07,320 --> 00:22:08,400
water

470
00:22:08,400 --> 00:22:10,460
let's see

471
00:22:10,460 --> 00:22:14,039
I soaked this rope for a few hours this

472
00:22:14,039 --> 00:22:17,520
is supposed to be 9.8 rope and I'm

473
00:22:17,520 --> 00:22:20,059
measuring

474
00:22:21,260 --> 00:22:26,419
11.3 let's see the wet spot

475
00:22:31,380 --> 00:22:32,520
okay

476
00:22:32,520 --> 00:22:34,740
so I don't see any difference at least

477
00:22:34,740 --> 00:22:36,840
on this rope which is worn out and it's

478
00:22:36,840 --> 00:22:39,600
already thicker when it's nominal value

479
00:22:39,600 --> 00:22:42,840
yeah so I didn't want to leave my fellow

480
00:22:42,840 --> 00:22:45,360
climbers hanging like that so the next

481
00:22:45,360 --> 00:22:47,640
day I took a bunch of different used

482
00:22:47,640 --> 00:22:51,240
ropes soaked them and measured the

483
00:22:51,240 --> 00:22:53,640
thickness and what I found out is that

484
00:22:53,640 --> 00:22:56,460
indeed some of the robes did got thicker

485
00:22:56,460 --> 00:22:58,740
like the green decathlon rope for

486
00:22:58,740 --> 00:23:01,559
example however other ropes did not

487
00:23:01,559 --> 00:23:04,919
change in diameter next I tested how

488
00:23:04,919 --> 00:23:07,380
smooth the ropes run through belaying

489
00:23:07,380 --> 00:23:10,140
devices and here my findings were mixed

490
00:23:10,140 --> 00:23:13,320
again some of the ropes got sticky they

491
00:23:13,320 --> 00:23:15,600
became harder to pull through belaying

492
00:23:15,600 --> 00:23:18,600
device and more likely to lock the blank

493
00:23:18,600 --> 00:23:21,539
device however other ropes got the

494
00:23:21,539 --> 00:23:23,700
opposite result they became more

495
00:23:23,700 --> 00:23:26,580
slippery as if water would lubricate the

496
00:23:26,580 --> 00:23:29,460
billeting device so yes the laying does

497
00:23:29,460 --> 00:23:32,159
change with water however it's unclear

498
00:23:32,159 --> 00:23:34,919
how how the change will affect Europe

499
00:23:34,919 --> 00:23:38,159
and about those other things well

500
00:23:38,159 --> 00:23:40,620
honestly it's unlikely that you will

501
00:23:40,620 --> 00:23:42,659
climb in such a wet conditions long

502
00:23:42,659 --> 00:23:45,419
enough to even have those problems so if

503
00:23:45,419 --> 00:23:49,559
your rope got a bit wet well try it but

504
00:23:49,559 --> 00:23:53,340
if I would be going to cold wet ice

505
00:23:53,340 --> 00:23:57,600
climbing places where people die

506
00:23:57,600 --> 00:24:00,000
um yeah maybe having a treated rope

507
00:24:00,000 --> 00:24:02,340
reduces the chance of dying this is so

508
00:24:02,340 --> 00:24:05,159
hard she put I mean I don't know just

509
00:24:05,159 --> 00:24:07,980
like being in a snowy or icy environment

510
00:24:07,980 --> 00:24:10,140
it's recommended to have the dry

511
00:24:10,140 --> 00:24:11,700
treatment because it's just an extra

512
00:24:11,700 --> 00:24:14,280
safety buffer yeah there is one route in

513
00:24:14,280 --> 00:24:16,980
Spain which crosses a waterfall in

514
00:24:16,980 --> 00:24:18,120
multi-pitch

515
00:24:18,120 --> 00:24:20,400
yeah I mean also if you're climb in very

516
00:24:20,400 --> 00:24:23,340
humid conditions it's Thailand

517
00:24:23,340 --> 00:24:25,919
we go there it's really humid and dry

518
00:24:25,919 --> 00:24:27,919
rope makes sense

519
00:24:27,919 --> 00:24:31,799
interesting so the little details shall

520
00:24:31,799 --> 00:24:33,360
we go to Thailand to do some science

521
00:24:33,360 --> 00:24:36,380
research trip

522
00:24:36,539 --> 00:24:38,640
all right if you found this video

523
00:24:38,640 --> 00:24:41,039
interesting I made the playlist for you

524
00:24:41,039 --> 00:24:42,840
where I was nerding with Mammoth

525
00:24:42,840 --> 00:24:45,240
Engineers on different topics very

526
00:24:45,240 --> 00:24:47,400
interesting topics so thank you Mahmoud

527
00:24:47,400 --> 00:24:49,320
for letting me to periodically come over

528
00:24:49,320 --> 00:24:51,659
and play with your toys and thank you

529
00:24:51,659 --> 00:24:54,240
Adriana for all their rope chemistry

530
00:24:54,240 --> 00:24:58,440
explanations and thank you for watching

531
00:24:58,440 --> 00:25:01,580
you in the next one