Everyone can launch a rocket. For this, there is no need to rent a spaceport, to spend a multi-million dollar fortune, because you can build a real water rocket from an ordinary plastic bottle.
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To begin with, we will deal with the necessary materials for a water rocket.
We will need an ordinary plastic bottle, one fitting (you can use a fitting from the camera of an old tire or buy it on the market for about a dollar), a glue gun, a piece of thread (preferably nylon, because it is stronger), a regular pump and tap water.
At the beginning, it is necessary to make a small hole on the cork of the bottle, screw a fitting into this hole and glue it all with hot glue for greater fixation and insulation and tightness.
Next, you need to build up one little ring on both sides of the cover. This must be done so that when winding the cover, the thread does not slip. Also, do not forget to fix one edge of the thread when building rings.
The rocket is ready. The question remains, how exactly does this design work?
In the bottle you need to draw a little more than half water, then tighten the cork. It is not necessary to tighten the lid too tightly, since its main role is not to let air in. The next step is to take the pump and pump air into the bottle. Then it remains to take the thread and screw on the lid. To launch a rocket, you just need to hold the bottle slightly with your left hand, and quickly pull the thread with your right so that the cap quickly unscrews.
The pressure of air and water raises the rocket into the air.
ATTENTION!!! Keep the precautionary rules. Never launch a rocket in the closed position.