Abstract
At first sight, a rocket seems to be about fire, noise and smoke. The basic principle of rocket is the famous Newtonian principle which says that "To every action, there is an equal and opposite action". A rocket throws mass in one direction and benefit of an equal reaction in the opposite direction. The first man who invented the rocket is the famous Mao Yuanyi in 1621. He wrote eighty books about that subject. (Visual). Indeed, those rockets were used for war. However, there is another famous man that usually use rocket, and here he is…. (Visual). This is the Coyote and he wants above all to catch Beep Beep. So, in order to achieve that goal, he decided to use a rocket. He put some gunpowder inside the tank, he jump on it and he lights the candle. Why his rocket exploded? Solid fuel has to burn very quickly but not explode.
GUNPOWDER: gunpowder is made up 75% nitrate, 15% carbon and 10% sulphur. Therefore, we may change the mix into 72% nitrate, 24% carbon and 4% sulphur. Instead of getting gunpowder, we get a solid-fuel that does not explode and burn during a long time (2 to 5 minutes).
