Aqua Jet

Rules & Regulations


Design and fabricate a single stage water rocket using a plastic container preferably a softbottle that uses a combination of pressurized air and water for propulsion tocomplete a defined task. A launcher should also be constructed that could launch. The water rocket safely.


  1. The capacity of the plastic container to be used should be less than or equal to 2 liters.

  2. Only water can be used as propellant. No other gas is allowed to be pressurized and provide thrust to the rocket. (Foot pumps and hand pumps can be used).

  3. The maximum pressure should not exceed 60 psi.

  4. Only the above given propellant should be used for launching (Mentos can be used).No other potential, kinetic, or any other form of energy will be permitted for the Launch.

  5. The Launcher must remain stationary on the ground while and after the launching of the rocket.

  6. No component or body part of the rocket should get detached from main frame during the flight of the rocket. If detached, the rocket will be disqualified.

  7. The flange and the mouth of bottle can be used to hold the rocket while pressurizing.

  8. Upper tip of rocket should be visible and marked red.

  9. No electronic device can be used.

  10. The launching mechanism should be such that participant is enable to launch the rocket safely from the launcher.


    • To keep rocket more aerodynamically stable there is a rule of thumb that states that the center of drag (COD) should be 1-2 times the distance equal to rocket diameter ,behind the Centre of Gravity (COG). Where COD can be found by making a cardboard cut-out of the sideways view of the rocket and finding its center of gravity.

    • To lower COD you can use wings or to rise COG try using weights on the nose of the rocket.

    • Be careful while experimenting with water rocket. Use of excessive pressure might lead to an accident.

    • Do not use mineral water bottles as they cannot withstand the high pressure.

    • Use soft drink bottle.

    • Do not use any metallic part in rocket as it can cause harm.

    • Safety googles are advised to be worn by the competitors.


    Any of following if satisfied may lead to disqualification of a team:

    • Rocket found dangerous by organizers and judges.

    • The Rocket don’t have a triggering safety launch from a distance of 1m from the launcher.


Sahil : +91 90562 32227