How we launched the 20-liter "rocket" on the water

Today I want to publish the material that we prepared last year. However, for several reasons, he lay on the shelf. It's about how we launched into the air a 20 liter bottle from the cooler with the help of water and an automobile pump. This is the only one who did not. But one thing is to look, and another is to try it yourself. The lesson turned out to be quite fascinating, and four hours passed quickly. I recommend everyone to the May holidays;)

Now more about the launch.
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Extract from Wikipedia:

Jet thrust is the force resulting from the interaction of a propulsion system with a jet of expanding liquid or gas flowing from a nozzle and possessing kinetic energy.

Sparkling wine test

First, we tried the effect of jet thrust on a bottle of sparkling wine, attached wheels to it.




Enough power to bottle drove a little over 2 meters.

Departure for nature and preparation for launch

Since the estimated altitude of the flight of the “20-liter rocket” is above 10 meters, we set off for the launch outside the city.

To begin with, the bottle was filled with water by a third.

It was decided to regulate the pressure on the eye by adjusting for this a cork of electrical tape wound on a hose from an automobile compressor.

Trial run

Having installed the rocket on the launch pad and connecting the hose to it from the compressor, we launch it.

Misfire. After a couple of minutes the hose knocked out and all the water flowed out. The rocket did not even budge, although the bottle had a little swelling bottom (rocket nose). Either the pressure is low or there is a lot of water and the rocket is too heavy.

Again preparation and second launch

To begin with, it was decided to increase the density of the cork by winding several more layers of electrical tape. Water at the same time poured the same.


Installation again.

Although the launch did not take place again, the rocket nevertheless made an attempt to take off.

Change parameters and the third launch

Once the rocket broke away from the launch pad, it means that it already has the strength. Now we tried to change the weight of the rocket, reducing the amount of water in half.


Finally everything worked out. The rocket flew.

Test run

To make sure that the result is not random, we launched a rocket 2 more times and all the launches were successful.

Launch video report

If you have any plastic bottle, car pump, electrical tape and you are in nature, you just have to repeat it yourself! And if you run with children, the theme for writing “how I spent the summer” will be provided.

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