Episode 5 Brain Freeze


Episode 5

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STUDIO BELL RINGS

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Oh, deary me. I wonder where McCork is? It's getting late.

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Colin, did you know that scientists in Europe have

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invented a plane which runs completely on solar power? How cool!

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That's amazing, Doctor.

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I wonder what sort of fuel Professor McCork is running on today.

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HE MURMURS APPRECIATIVELY

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Ten seconds to air, everyone.

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Ohhh!

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HE BURPS

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Oh, excuse me.

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-DRAMATIC VOICEOVER:

-This is Brain Freeze.

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With Dr Knowles...

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Professor McCork...

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..and Colin, the floor manager.

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Stand by.

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Hello, everyone, and welcome to Brain Freeze.

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And let's reveal...

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Today we're asking...

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Ah, do we have to talk about this, Dr Knowles? I hate flying.

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It's OK, Professor. Relax.

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There are four main factors involved in getting a plane off the ground.

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Please tell me none of them is luck.

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These are...

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Thrust is the force that moves the aeroplane forward.

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It is generated by the plane's engines or propellers

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and overcomes the drag force present in the air.

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Remember, air isn't nothing.

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It's a mixture of gases that the plane has to push through.

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So, it's like riding a bike in the wind blowing in your face or

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-something?

-Something like that, Professor.

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Ah, see, I'm not just a pretty face!

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But before we take off, a quick word from our sponsors. Stay tuned.

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DRAMATIC OUTRO

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And we're clear! Are you looking forward to your trip, McCork?

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I am indeed. New York city.

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The World Hot Dog Eating Championships.

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-Months of training finally about to pay off.

-Oh!

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It's been so long since I've had a holiday.

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The thing is, I've no idea how I'm going to get there. I hate flying.

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-Well, they say it's perfectly safe.

-I was thinking maybe I could drive.

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CAR HORNS TOOT

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Ah, no, strike that. Maybe I could swim?

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-Not after eating all those hot dogs, Professor.

-Yeah, true enough.

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Here, I could try taking one of them jet skis.

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Help! Oh! Help!

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Ooooh!

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Well, I'm sure you'll figure something out, McCork.

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Places please, everybody.

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Just in from Frank.

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If thrust makes the plane go forward, what makes it go up?

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Aeroplane wings are designed in a special way.

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They're curved on top and flatter underneath.

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The air moving over the curved part of the wings flows faster than

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the air at the bottom, creating a difference in pressure

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resulting in an upward lift force.

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This lift force combines with the forward thrust of the engines to

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-overcome the drag force of the air.

-Ah, finally.

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But there is one other force at work - gravity.

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Gravity is the special force that pulls all of us down

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on the Earth's surface.

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When the upward lift force created by the wings is greater than

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the force of gravity pulling the plane back to Earth,

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it's time to fasten those seatbelts!

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So, now you know how an aeroplane flies.

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Lift has to overcome gravity and thrust has to overcome drag.

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And I have to overcome fear.

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That's all for today's show. See you next time.

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DRAMATIC OUTRO

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And we're clear. Phew! Great show, guys.

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Maybe I could ride a whale over or jump on a dolphin's back or

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-maybe I could get a TARDIS like yer man, Doctor Who.

-Oh, look at this.

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-Cheapskate Airways. Flights to New York for 25.

-Ah, that's magic.

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-Book me in, so, Doctor.

-But, wait.

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-I thought you were afraid of flying?

-Well, a bargain's a bargain, Colin.

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Oh, McCork!

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