WEBVTT
Kind: captions
Language: en

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- When you go to a theme park

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or some adrenaline-junkie
tourist attraction,

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you expect it to be safe.

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Thrilling, sure, but safe.

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But how can the companies
that create those rides

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test a new one?
Say you've got a new invention

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like say, a zipline
that goes round corners.

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There are a few rides
sort of like it the world,

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but they all use different technologies
and work in different ways.

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There are standards for
things that are mass produced.

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How do you test something
that's one of a kind?

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You really swing outwards
on that, don't you?

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- We, as a company, like to
invent and break and test stuff.

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So we've gone through the process

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of testing other people's
stuff to making our own.

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- Traditionally ziplines
are a cheap amusement ride.

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They go from point A to point B

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and you need to have
a clear line of sight.

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They're different from a rollercoaster

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which is able to go round corners
but has an awful lot of expense

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in building the infrastructure
to hold the rails up.

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The difference is our
product transitions

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from a wire rope cable into
a corner which is rail-based.

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That allows you to go much further

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because a zipline can travel kilometres

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and a corner can provide
a lot of entertainment.

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We have a patent on the technology
so we've got sole use of it.

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Previously, braking systems
were friction-based.

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Our new system has eddy current brakes.

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This is a property of materials

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that occurs when you move a
magnet through a conductor.

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I have in my hand an aluminium channel,
that acts as the conductor.

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If I drop a steel mass down
this aluminium conductor,

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as you would expect, it will fall.

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If I now drop a magnet down
this aluminium conductor,

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eddy current braking will slow it down

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and it will fall at a very slow rate.

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We've captured that and incorporated it
into our eddy current brake.

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That allows you to have
no contacting parts

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so there are no wear surfaces.

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So there's no brake dust that's created.

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The brake is configured such that,

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regardless of the rider weight
and wind conditions

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and gradient of the corner,

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you will always fall at a peak velocity
which we have governed.

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No electronics in there whatsoever.

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It solely works on springs,
centrifugal force and eddy current braking.

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- Regulations on rides and attractions

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differ massively depending
on where you are.

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In some states in the US, for example,

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the job of checking that a ride is safe
is left to the insurance companies

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who'd have to pay out if
there was an accident.

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The only time the government gets involved
is if something has gone so wrong,

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if the company has been so negligent,

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that there might be criminal charges.

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Other countries, like New Zealand
are a bit more strict.

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There is a difference
between foreseeable misuse

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and unforeseeable misuse.

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If someone gets their phone out on a ride
to take a picture

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and it falls out of their hands and
cracks someone's head open underneath,

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well, you should have seen that coming
when you built the ride.

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Someone was probably gonna do that,
you should have put a net down.

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But if someone deliberately
breaks the restraints

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so they can stand up
on your rollercoaster,

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well, that's their own fault.

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The definitions are deliberately
vague in law, though.

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Because it's easier to say that
you should do "everything reasonable"

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rather than change the law every time
someone invents something new.

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- Most countries have their
own national standards

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and they are acceptable
ways of doing things.

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They lay out how you
should engineer things,

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how you should test them.

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It's important to comply with standards.

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It's also important to show
that you've complied with standards

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so that people can trace
what you've done and why

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through the design process.

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Generally when you're doing
something new, though,

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there isn't a standard that you can use
to encompass the entire product.

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So what we do is we actually go out
and we look at all the standards

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and we pick bits from
each of the standards

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that we think are most applicable.

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When you design a ride, for
example, a zipline ride,

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you work out fast the person's going to go

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and how much force they're going to
apply to each of the components.

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If you have a safety factor of five,

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you multiply the maximum that
the system will see by five

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and you need to design
and test to that factor.

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What we need to do, though,

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is we try and work out what will go wrong
should any part of the system fail

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and part of that failure modes
and effect analysis

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is to work out how
people could do stupid things.

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Which they will.

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You look at the history,

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you look at what people have
done on ziplines in the past.

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The main thing is to stay involved

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right through to seeing
the thing being used.

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Spot potential misuses
and mitigate for them.

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- Oh, here we go!

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Oh, man.

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That doesn't look like
much from the outside

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but when you swing round that corner

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it makes a heck of a difference.

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Thank you very much to all the team

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at Holmes Solutions.

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You can pull down the description
for more about them and their work.

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The first one of these rides is going in

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at Pigeon Forge, Tennessee,
sometime this year.

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Thank you, folks.