【臺(tái)詞】Do You Know S1-07 Boat Propeller and Hot-Air Balloon

【臺(tái)詞】Do You Know S1-07 Boat Propeller and Hot-Air Balloon

Do You Know S1-07a Boat Propeller1人有 · 書評(píng)1 Do You Know S1-07a Boat Propeller

Do You Know S1-07b Hot-Air Balloon1人有 · 書評(píng)1 Do You Know S1-07b Hot-Air Balloon

Hello, I'm Maddie.

And today, I'm looking at transport

and the different ways

you can travel around.

Oh, look! There's a boat!

I love boats! Do you?

I like the way they glide

about on top of the water.

But do you know how a boat moves?

How does it work? Let's find out.

How does it work?

A boat!

Come on,

we're going for a boat ride.

Let's go! Ha-ha-ha-ha!

And we're off!

Whee! Hee-hee-hee!

This is so much fun!

You can see there are lots of

different parts to a boat.

That's the front, the pointy bit,

and it's called the bow.

And this is the back,

it's called the stern.

And then that is the engine.

And in the middle, we have places

to sit and put our things.

At the bow,

there is something called an anchor.

Peter lowers the anchor into the

water, to the bottom of the lake,

where it will hook into the ground

and hold the boat in one place.

But there are lots of parts

of the boat you can't see.

Do you know why?

It's because they're in the water.

I know!

Let's use my special camera

and this underwater light

to see if we can get a closer look.

Now you can see underneath the boat,

and this is what makes it move.

This is called a propeller.

Here's a little toy boat.

You might have one like it

to play with in the bath.

And this one has propellers, too.

Can you see?

The propeller looks a bit like

a fan that goes round and round

and cools you down, doesn't it?

But on a real boat, the propeller

is powered by an engine.

That's what makes the boat move.

The engine and propeller

are attached to each other.

Petrol goes in the boat engine.

And when it starts,

it makes a big brum-brum noise.

WHIRRING

Inside, the petrol starts to burn.

And as it does,

it creates a powerful gas.

The gas pushes a long pole

called a piston

backwards and forwards,

backwards and forwards.

As the piston moves,

it turns a cog at the bottom.

This cog turns another cog

attached to the propeller

outside the boat.

As the propeller spins

round and round,

it pushes the boat through

the water.

Let's go!

Look at the propeller. You can see

the blades spinning around,

pushing the water away behind it

and sending the boat forwards.

To take a closer look

at the propeller,

we are using something called

a winch to pull the boat in.

MADDIE LAUGHS

I'm helping pulling the boat in.

Doesn't the winch sound great?

CLICKING

Clickety-click!

The propeller has three blades.

One, two, three.

These three blades help push

the boat through the water.

Being on a boat is such great fun!

But if you were on a boat,

where would you like to go?

Can you remember the name

of the front of the boat?

It's the pointy bit

and it's called the bow.

Did you hear the winch as it pulled

the boat out of the water?

It went clickety-click.

And did you see the propeller

spinning round and round?

So next time you see a boat,

you'll know just how it works.

There are lots of other ways

to travel.

On the water,

on the ground, in the sky.

What things travel up in the sky?

There are aeroplanes, helicopters

and my personal favourite,

the hot-air balloon.

This is just a toy hot-air balloon.

The real thing is much bigger.

But do you know how

a hot-air balloon is made?

Let's find out.

How is it made?

A hot-air balloon.

Hot-air balloons are really big.

They have a basket for people

to ride in

and a huge balloon which lifts

the basket high into the sky.

And this is where they're made.

Yes, this is

a hot-air balloon factory!

And that is a lot of material.

The material is called nylon and it

arrives in the factory in big rolls.

So, how does all this become

a balloon?

First, the material needs to be cut

into smaller pieces

with a small, round cutter.

Here it is. It fits inside

the machine, just here.

Let's see it cut the material

into smaller pieces

using my special camera.

With my special camera in place,

it's time to turn the machine on.

The cutter is programmed

by a computer

to cut the strips

into the right size.

It moves along really fast.

It doesn't look like

it's doing anything,

but believe it or not,

that is cutting the material

into smaller pieces.

It takes lots and lots of these

strips of nylon

to make a hot-air balloon,

but how are they joined together?

That happens here,

in the sewing room.

The sewing machine joins up

the edges with thread

using a special stitch

so the material won't tear.

Listen to that sound.

WHIRRING

It's a bit like a jigsaw.

The pieces have to be sewn together

in the right order

so that you end up with

a perfect-looking balloon.

Whilst the balloon is being

sewn together,

in another part of the factory,

the team are working on the basket.

The basket is made from willow,

a type of tree that is light

and bends into shapes easily.

Look how the wood has been woven.

It's like a bigger version of

a basket you might have at home.

Like a bin!

Or a fruit basket.

Have you got a basket at home?

But this basket is going to carry

something much heavier than fruit.

It's amazing to think that this

will soon carry people high,

high up into the sky.

Back upstairs,

one of the balloons is ready.

But do you know how much material

goes into making just one balloon?

Wow!

Look how much material there is.

It's like the biggest

superhero cape ever!

But to see just how much material

there really is,

let's fill it with air.

WHIRRING

Wow! It's enormous! It's so big,

it won't even fit inside this room.

Big moment. Let's go inside!

Oh! That is amazing!

Let's go on an explore around

the balloon with my special camera.

Look just how huge this balloon is!

You can see how all of the pieces

of material

have been stitched together.

There's actually

a thousand metres of material here.

If you stretched all of that out,

it would be the same as 80 big buses

in a row!

HORN BEEPS

So we have the balloon

and we've got the basket,

now we just need to see it fly.

The team are getting

a hot-air balloon ready to fly.

First, they have to unpack all

the material and lay it out flat.

I'm so excited to see all of this

flat material inflate.

Next, the team are going to inflate

the material with air

using a fan so that it blows up.

It's a bit like a party balloon.

Only a lot bigger.

Where'd it go?

Wow!

This hot-air balloon is enormous!

This is the gas burner.

It makes the air inside

the balloon hot,

which lifts it off the ground

and makes it fly.

Look at that, a giant white balloon!

What do you think it looks like?

I think it looks

a bit like a huge egg.

Just look at this hot-air balloon.

Isn't it incredible how a flat piece

of material can turn into this!

I loved seeing how

a hot-air balloon was made.

What was your favourite bit?

Do you remember the name

of the part of the balloon

that carries people?

That's right, it's the basket.

Did you like the sound of

the sewing machine

when it sewed all the material

together?

WHIRRING

And did you see how big the balloon

was when it filled up with hot air?

It was huge!

So now we know how a hot-air balloon

is made.

With lots of material,

lots of sewing

and this bendy wood

that's used to make the basket.

And now we know how a boat works,

using a propeller under the water

to push the water away.

Right, there's only one thing

left to do. Fly!

Up, up and away!

I'll see you next time. Bye!