![]() You see how high that went? It's amazing. So this was actually the best one, wasn't it? They're looking at it going Whee! Look at. 'Oops, we seem to have hit one of the teacher's cars.' Luckily they're having a bit more success than this group. 'Bloodhound rocket engineers are experts in their field and are continually testing the rocket in order to produce the perfect model. So it's quite impressive when you throw a load of water out the back isn't it? Was yours the one that didn’t work- Whee. 'Pumping air into the bottle 'causes the pressure inside the rocket to build up and that's what pushes the water out of the back of the bottle and propels it into the sky.' Now, this is really safe, but they can go quite high and quite fast, so we've got to do this outside and make sure that the rockets are angled away from everyone. Attach one end of the rubber tubing to the bottle, and the other end to a track pump, and you're ready to launch.' Try experimenting yourself with different volumes of water. ![]() To get the rocket to work properly, we have to get the right amount of water in the bottle. 'Here we're using an easily available rocket kit which turns an everyday fizzy drinks bottle into a rocket. The way they work is that if stuff is thrown in one direction, then the stuff that's throwing it, in this case the bottles, goes in the other direction, yeah? And the reason why fire works is because when you get fire and lots of explosions it makes lots of gas. So you don’t need fire for rockets to work. ![]() Yeah, so people think often that it's fire, okay? But in this case, well, we don’t have any fire do we? So you know that Bloodhound has a rocket on the back of it, yeah? Do you know how rockets actually work? So I'm here at New Invention Junior School in the West Midlands to investigate how a rocket can give Bloodhound the power it needs to go so fast. Bloodhound is hoping to be the fastest car in the world, by using both a jet engine and a rocket.
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