A teacher and his students built a 2 stage rocket from plastic bottles and powered by water pressure.



    by ask_ur_mom

    47 Comments

    1. Each bottle is used as a pressure container. Part of the bottle is filled with water and the remaining volume with air.When the nozzle is opened the compressed air expands. Expansion forces the water out of the bottle at high speed. As mass is expelled downward an equal force pushes the bottle upward.

    2. Okay this is actually pretty impressive. I’ve seen way smaller water-powered rocket models but never something that goes **this** far.

    3. That went wayyy higher than I expected. Really cool and probably life changing for these students.

    4. szechuan_broccoli on

      They should put an altimeter in it so they can gauge progress if they do subsequent launches

    5. SLOOT_APOCALYPSE on

      that was amazing I built a 1 stage water rocket when I was 12, I won third place in the science fair, I lost to a solar panel RC kit car, still salty over it because you weren’t supposed to use kits, it was supposed to be your own built project but of course the judges were parents and teachers, ooooohhh ahhhh.

      * yeah this person needs to go to college, if there is someone wise enough to recruit them they should do it now

    6. Air Pressure is what powers the vehicle. The water is expelled by the air that was stored inside the pressure vessel.

    7. Why is it that the contrail of a rocket appears curved even as the rocket proceeds straight up?

      Is that some curvature of the Earth thing?

    8. Philosopher1776 on

      This is the stuff we desperately need in our school system. I will contact the Department of Education, oh wait, we no longer have a functioning Department of Education.

    9. Chemical_Cat_9813 on

      My 2015 hs graduate did this in science class and rocket club. Its out there at many schools, just need a kid willing to learn this and put in the time, time otherwise spent on a screen.

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