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| This page contains instructions on how to build a simple, cheap and relatively safe rocket. However I must warn you that it uses a pressurized container which could possibly cause. | ||||||
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build your rocket you will need to obtain the following ingredients.
I find that for bottles the ASDA brand cola range seem to provide results. |
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football adapter valve comes in two parts which need to be separated. Discard
the long thin metal section and remove the metal ball from the shorter
one.
You can remove the ball by either widening the opening of the valve part so it falls out or by hack sawing this end off. Next drill a hole through the centre of the 330ml bottle top. The ASDA brand contains a soft plastic seal inside the top which is perfect for preventing leaks. On other brands you may have to put a little Blue-tack around the hole to prevent leakage. Screw the valve part into the hole from the inside of the top. You now have a MK I rocket but if you try to launch it you'll find it spins wildly out of control! To keep it flying straight add a booster section. To do this remove the top curvy section of the 2l bottle. The hole you make where the neck of the bottle was should be slipped on to the neck of the 330ml bottle. Screw the adapted bottle top back on and you're ready to launch the MK II water rocket. To make your rocket spin like a helicopter on re-entry, cut the booster section into slices and fold them out. This is the MK III. The MK IV is a poor performer so I won't describe how to make it just lean from these mistakes. *A short booster section is NOT good! *Fins near the middle cause it to fly straight for a time then spin, spraying everyone in the process. * Paint and cellotape on the bottle decrease it's expansion thus less water pressure. * A pointed nose cone only adds weight and increase the chance of injuring someone! |
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dfgdfgdfgdfgdfg dfgdfgdfgdfgdfgdfgdfg dgdgdgdgdgdgdgdgf |
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