Water Rocket

The purpose here is to design and manufacture a water rocket. A water rocket is a type of model rocket using water as its reaction mass. The engine of the  rocket is usually a used plastic soft drink bottle. The water is forced out by a pressurized  gas, typically compressed air. It is an example of Newton's third law of motion.

It covers various aspects of product making including design, model construction.


27th Feb : 9am to 5pm

venue –ceesat


• Event consists of two rounds. 

• First round : RANGE TEST

          Here the range is tested. The points given to the teams based on the range reached 

by the water rocket. This round is eliminative from which top teams will proceed to the next stage.

• Second round: No Rush – Reach the Target

           At a distance of 100m from the launch pad, a target of 10m diameter circle is 

placed. Maximum points are scored by the team who takes more time to reach the 

target. If target is not reached, no points are awarded.

The final judgement is based on the total points scored by the participated team in both the

two rounds described above.

• The total points scored in both the  rounds are added up and awarded as their 

final score.

• Decision of the organisers is final.

•  Water rockets can have multiple stages. Parachute, gliding and other mechanical 

launch mechanisms are allowed. Booster mechanisms are allowed as well.

• Use of electronic components and chemical explosives are banned.

• Teams are advised to get more than one water rocket, in case of any damage to one. 

But the water rockets must be identical.

• Water rockets for different rounds could be different, but for the same round, they 

must use the same water rocket.

• Two trials will be given and best two will be taken into consideration.

• The team will be disqualified/given another chance to remodel if the model is found 

   to be dangerous in anyway. Decision of the organisers is final.

• The rocket body should be made only with plastic bottles of aerated soft drinks of maximum capacity 2.5L and should be free of any fabrication failures or dents caused by heat exposure. More than one bottle can be used but the total volume must be less than 2.5L

• Participants are supposed to get their own launching pads and same launching pad 

cannot be shared by other teams.

• Maximum pressure supoorted 60psi

• The provided footpump will only be compatible with common bicycle valves


1. Can school students participate as well? Totally.

No barriers at all.

2. What will be the pre-requisites?

Building a water rocket is both fun and quite an easy task. Basic designing and fundamentals in aero modelling would be sufficient.

3. Will launch pads be provided?

Not in any circumstance. The team has to deal with their launch pads in case if it gets damaged or broken.

4. Will any materials be provided on the spot?

The organization only provides water, a measuring cup, a bucket and compressors (which will have an in-built pressure gage). Other materials will NOT be provided. However, you could buy items in the stationary shops in the campus.

5. What if the rocket gets destroyed?

The team is expected to deal with the damages and repairs of both their rockets and launch pads, if any such thing occurs. If the team is unable to get them fixed, they will automatically be disqualified. Any destruction of the college property or the models of other teams will lead to direct disqualification.

6. Are we allowed to have mechanisms in our models?

Yes, as long as they do not involve any electronic circuits and chemical explosives. Moreover, any sling-shot or catapult mechanisms in the launch pad will NOT be allowed. Allowed mechanisms are parachute, gliding, multi-stage rocketing, zip tie, etc.

7. Who decides if the team in allowed to participate in the first place?

The event managers’ decision is final in this regard. If any model is found dangerous to the humans or property and if any of the above prohibited mechanisms are used, the team will be disqualified.

8. Is pre-registration necessary?

It is highly recommended that you pre-register for the event. But you can also register on-spot in the PR desk. The on-spot registration must be done at least one hour prior to the event’s start.

9. Should the model be made even before we come to the college?

Not necessary. You can get the materials and construct your model even inside the campus, but before the event begins, it should be completely ready and functional. If the organizers find the model to be readymade, the team is disqualified. The organizers’ decision is final.

10. Is modification of the model design allowed?

Modification of models in a particular round is prohibited. However, different models can be used in different rounds.

11. How many trials will be given for a team in a particular round?

Strictly two. No more, no less. We will either consider the best  or the average. The final judging criteria will be intimated before the event begins.

12. What if there is a tie between some teams?

The organizers will decide whether to conduct a tie breaker. The tie breakers will be simple enough that won’t require major changes in the model.

13. How much time will be given for one launch?

Maximum 15 minutes. No additional time will be given.

14. Will I get an additional trial if the rocket fails to launch, i.e. if the rocket doesn’t leave the launch pad itself?

You wouldn’t get any additional trial unless you have one trial left out of the two allowed trials.

15. What will happen if I reach late for the competition?

Punctuality is highly appreciated. But in any case of unavoidable delay, inform the organizers before, so that they would be able to allocate a time slot for you. But if you appear late without informing, you’ll be disqualified.

16. Can we team up with students of other colleges?

Yes, it is allowed. The members could be from different colleges, different branches, different years or even pursuing different degrees (UG and PG). 

17. How many participants per team is allowed?

2 or 3 people per team. No more and no less

To download information regarding WATER ROCKET click the link below:


Other useful links:







1.. Shiva Manohar - +91 9791449432

2. Gopi krishna - +91 8438424495          

3. Vignesh- +91 9497866598





Other Queries:-

Ashwin Bharathwaj

+91 9894945490

Design a water rocket that is completely powered by the thrust

provided by compressed air in the bottle and using water as the ‘fuel’ to increase 

the mass fraction.

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Developed by Delta Force.
Designed by NITT-Design Team.