World First RPG Propelled By Water Bottle Rocket
This is the RPG that I have created that is propelled by pressurized water and air. If you can’t see me, I’m at the far right of the video, the spot where I launched the RPG water rocket.
For this video, the rocket is pressurized to 60psi and filled with 250ml of water. You can see that when the rocket is launched, there is some short burst of water spray which is the reaction mass that help to propel the water rocket forward.
This happens because water is forced out of the rocket by the pressurized air.
The water rocket then reaches a peak when the water has all expelled out, it then descends back to the ground due to the force of gravity.