0:21:06 > 0:21:08This is Blue Peter but mini.
0:21:08 > 0:21:11Expect epic adventures, makes,
0:21:11 > 0:21:13bakes, badges, pets,
0:21:13 > 0:21:15presenters and your post.
0:21:15 > 0:21:19We've only got five minutes so get ready for your Blue Peter adventure.
0:21:20 > 0:21:25It's time for me to take on these massive towering turbines.
0:21:25 > 0:21:28I've had to complete some tough sea survival training.
0:21:31 > 0:21:34Let's hope I don't need it as I join the specialist
0:21:34 > 0:21:38engineering team who are going to show me how a wind turbine works.
0:21:42 > 0:21:45We are heading 12 miles out off the coast of Liverpool.
0:21:45 > 0:21:47It is wet and it is very windy.
0:21:49 > 0:21:51The wind farm is approaching,
0:21:51 > 0:21:53so it's time for me to gear up
0:21:53 > 0:21:56and prepare for these super-sized structures.
0:21:56 > 0:21:59We've now just entered the actual wind farm
0:21:59 > 0:22:03and the first thing you notice is just the size of them.
0:22:03 > 0:22:07They are genuinely enormous.
0:22:07 > 0:22:13Each turbine is approximately the height of 26 double-decker buses
0:22:13 > 0:22:15and I love it.
0:22:17 > 0:22:20As our boat approaches the turbine, everything starts to get serious.
0:22:20 > 0:22:24This is by far the most dangerous moment in my whole day,
0:22:24 > 0:22:28the transfer from the boat to the ladder.
0:22:28 > 0:22:30I got a bit confused in training...
0:22:30 > 0:22:32Er, no, the rope.
0:22:32 > 0:22:36..but now it's the real deal. I have to stay ice cool.
0:22:37 > 0:22:41I tell you what, this is a touch different to the swimming pool.
0:22:42 > 0:22:45I need to tread carefully. The rungs are slippy with seaweed
0:22:45 > 0:22:48and the wind is swirling all around me.
0:22:48 > 0:22:51All I can do is keep climbing.
0:22:51 > 0:22:53This is one seriously extreme job.
0:22:57 > 0:22:59And I've made it.
0:23:01 > 0:23:02I'm now 20 metres up.
0:23:04 > 0:23:06Can you hear that?
0:23:06 > 0:23:10Because those are the sounds of blades. Look at the size of them!
0:23:10 > 0:23:12Look how close they are.
0:23:12 > 0:23:16You can almost feel the air resistance touching your cheek.
0:23:16 > 0:23:17It's amazing.
0:23:17 > 0:23:20And in a few seconds I'm going to go and turn those things off.
0:23:20 > 0:23:22This day gets better and better.
0:23:22 > 0:23:25The engineers winch up their equipment
0:23:25 > 0:23:28and then it's time for Paul and me to do a very important job.
0:23:28 > 0:23:32I hope you can hear us. It is incredibly loud in here.
0:23:32 > 0:23:37This turbine can generate over 3,000 kilowatts
0:23:37 > 0:23:38and that amount of electricity,
0:23:38 > 0:23:41we need to turn it off to make sure we're safe.
0:23:41 > 0:23:44You should feel a little wobble when the brakes come on properly.
0:23:44 > 0:23:45Yeah, I can feel it now.
0:23:47 > 0:23:49And there you go. Stopped.
0:23:49 > 0:23:52Turbine is safe and there's no turning back now.
0:23:52 > 0:23:54So this is it.
0:23:54 > 0:23:57120 metres up that way.
0:23:57 > 0:23:59Take me to the top.
0:24:00 > 0:24:05The shaft of this tower is so massive it has its very own lift.
0:24:05 > 0:24:08As I head to the top, let's find out how wind energy works.
0:24:10 > 0:24:13This generator makes electricity by spinning
0:24:13 > 0:24:14a magnet inside a metal coil.
0:24:16 > 0:24:19You might have made a small version of this at school.
0:24:19 > 0:24:22There are many different ways to power a generator.
0:24:22 > 0:24:24In this case, it is using wind power.
0:24:26 > 0:24:29I'm now 80 metres up in the neck of the turbine.
0:24:29 > 0:24:33This is the part which actually pivots the whole top of the turbine
0:24:33 > 0:24:34with the blades and everything
0:24:34 > 0:24:37so it faces the wind in any direction.
0:24:37 > 0:24:39To generate maximum power,
0:24:39 > 0:24:42the turbine's blades must be facing into the wind.
0:24:42 > 0:24:44But because the wind direction changes,
0:24:44 > 0:24:46these turbines need to be able to rotate.
0:24:46 > 0:24:50There's six motors, now, all turning the turbine.
0:24:50 > 0:24:53So you can see this moving quite slowly,
0:24:53 > 0:24:58and automatically this will pick up where the wind is
0:24:58 > 0:25:01and turn it any which way to find the best direction.
0:25:01 > 0:25:03This place is the best.
0:25:03 > 0:25:05Such incredible engineering.
0:25:05 > 0:25:09It's now time to go even higher into the head of the turbine,
0:25:09 > 0:25:10known as the nacelle.
0:25:13 > 0:25:16- Paul, I am in the nacelle. - Yep. There we are.
0:25:18 > 0:25:20So, what exactly goes on here?
0:25:20 > 0:25:22What we are looking at now is, obviously,
0:25:22 > 0:25:24outside you have got the hub and the blades
0:25:24 > 0:25:26and then that turns this main shaft here,
0:25:26 > 0:25:28and then that goes into the generator,
0:25:28 > 0:25:31which is what produces the electricity.
0:25:31 > 0:25:32It's really similar to...
0:25:32 > 0:25:35It goes from the wind outside, that's free,
0:25:35 > 0:25:37transforms, transforms
0:25:37 > 0:25:40- into everything we need for our homes.- Yep.
0:25:40 > 0:25:42Now, Paul, a bit of a favour.
0:25:42 > 0:25:47Is there any way we could stand on top of the nacelle?
0:25:47 > 0:25:48We can certainly stand out the back
0:25:48 > 0:25:50on what we call the weather deck,
0:25:50 > 0:25:52but we can't stand on top of this.
0:25:52 > 0:25:53See you on the weather deck.
0:25:55 > 0:25:56This is it.
0:25:56 > 0:25:59The moment I've been waiting for since the start of my training.
0:25:59 > 0:26:05Time to stand at the top of this 120 metre mega-structure.
0:26:06 > 0:26:08Would you take a look at this view.
0:26:11 > 0:26:14The wind energy turned into electricity.
0:26:14 > 0:26:16What an incredible thought that is.
0:26:17 > 0:26:19Genuinely flabbergasting.
0:26:19 > 0:26:20I've learnt so much.
0:26:20 > 0:26:22All I need now to do is just to, erm...
0:26:22 > 0:26:23Well, get down, I guess.
0:26:23 > 0:26:24Guys?
0:26:24 > 0:26:26Anyone?
0:26:27 > 0:26:30Help!