The jet engine - it is not obligatory the dangerous device burning fuel. Such engines, especially when using for starting of models of rockets, can work also at other, safe principles.
Instruction
1. Take a piece of usual polyfoam. Make of it a cylinder about 50 centimeters long and with a diameter about 8 centimeters.
2. In a cylinder do the long channel with a diameter about one and a half centimeters and at two-three centimeters long less than length of a cylinder. From outside, opposite to the beginning of the channel, round off preparation to give it the improved aerodynamic qualities.
3. Make a piece about 15 centimeters long of a plastic pipe which diameter such is that preparation is put on her quite hardly, but easily is removed. Round its edges on both sides.
4. Via the adapter for coordination of diameters connect a hose to one of the ends of a tube. Pressurize adapter junctions with a tube and a hose in any way (the usual adhesive tape will approach).
5. Connect a hose to the bicycle pump, and establish a tube on a strong massive support vertically.
6. "Rocket" if desired paint, a primotayta to it an adhesive tape a LED small lamp, including, self-made. It has to eat from easy batteries, for example, sentries (not lithium, in order to avoid ignition of polyfoam at accidental short circuit), differently the weighted model of a rocket will not be able to depart. Think up a way of ornament and for "launcher" - for example, its vykrasta in khaki, but so that paint did not prevent movement of any moving parts.
7. Take out "rocket" and "launcher" on the street. Make sure that the model after start will not get to anybody into an eye. Delay the bicycle pump then sharply press it. Toy "rocket" with the pneumatic jet engine will rise approximately by thirty meters. You watch that it did not fly on a roof or someone's balcony. If it is supplied with a small lamp, it is the best of all to start it in night-time - the safe and reusable alternative to ordinary fireworks will turn out.