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WATER ROCKET

“Build a rocket and leave the Earth!” ….and building a Water Rocket is not really a ‘rocket science’

The WATER ROCKET competition for 5th graders is not only of play and excitement, but also great way of learning some basics in science. This event and its Learning materials explain the hidden science in very simple and practical way.

The competitors are expected to build a WATER ROCKET out of any materials of their choice, and launch it to win the race.

 

WATER ROCKET RULES 2019-20

PROBLEM STATEMENT-

Build a water rocket out of any plastic suitable container that will soar in the air for the longest time.

Time starts at count of ‘zero’ call and ends at moment rocket touches the ground.

IMPORTANT-

STUDENTS SHOULD BUILD/ASSEMBLE THEIR ROCKETS AND NOT USE READY-MADE/ ‘READY TO LAUNCH’ ROCKETS.

HOWEVER, LAUNCHERS, PUMPS OR PARTS WHICH ARE NOT PART OF THE ROCKET CAN BE BOUGHT READY-MADE

 

General notes-

  1. The rocket should be propelled by pressurized air and water only. The rocket will be launched vertically from launcher.
  2. Competitor can bring their launcher or standard launcher will be provided by cognium.
  3. The rocket can be made up of any bottle, tube or container not more than 1-liter volumetric capacity of the pressure chamber.
  4. The launcher can be made from any materials of competitor’s choice or from the kit available with cognium’s website.
  5. Competitors may buy a launcher kit from our website if they wish. They may use it for purposes of trials, experiments or practice. However, buying kits from our website is optional and is made available for competitor’s convenience only. Buying from cognium will not earn any extra credits at the competition.
  6. The competitor shall ensure that parts bought from sources other than cognium, conform the rules of the competition, failing which the model will be disqualified.
  7. There will be a revised problem statement for the final round. These revisions will be announced after completion of the first round. Winners of the first round may, if they feel necessary, modify or rebuild their rockets to meet the revised problem statement.

 

COMPETITION DESCRIPTION

Competitors are required to build a water rocket out of any plastic material (like mineral water bottle, plastic pipe, or such other container or bottle). The volumetric capacity of the pressure chamber of such rocket should not exceed 1 ltr. The rocket will be mounted on the official competition launcher, and the rocket is pressurized to 2 bars maximum. A competitor can decide on the quantity of water, nose shape, fin size and shape, surface preparation so that it soars highest. Rocket should follow a sine wave trajectory. Random trajectory will lose points.

 

RULES

  1. Dimension rules
  2. Maximum capacity of the pressure chamber of rocket should not exceed 1 liter
  3. It must have an inside nozzle diameter of 15 mm. maximum to 5mm minimum
  4. Rocket must carry plain water and compressed air as a propellant
  5. Quantity of water at the liftoff should not be less than 50 ml.
  6. Maximum pressure at liftoff should not exceed 2 bars.

 

  1. Weight

There is no weight limit for the rocket.

Materials of construction

For rocket

  1. The rocket can be made up of plastic material only (metal or glass may cause injury)- like mineral water bottle, plastic pipe, or such other container. If you are using a mineral water bottle, you can use the bottle cap and drill a hole in cap of any size if desired between 5mm and 15 mm.

MINIMUM SIZE OF NOZZLE SHOULD NOT BE LESS THAN 5MM OR MORE THAN 15MM.

For launcher

  1. Competitors may build their own launcher to match their rocket. Instructions for building a simple launcher are available on internet.

Alternatively, they can buy a kit made available for the competitors for our website.

  1. Buying launcher from Cognium is not mandatory.

POWER

Propellant

  1. The volumetric capacity of the rocket chamber should not exceed 1 ltr. (1000 cc) grams.
  2. Any propellant other than plain water and compressed air is not permitted.
  3. The quantity of water shall not be less than 50 ml.
  4. The pressure of the propellant shall not exceed 2 bars

GENERAL RULES.
Students are free to design the rocket and its parts in anyway, which can make it soar in the air for the longest time. No mechanisms, resulting in increasing the maximum permitted pressure are allowed. Only passive mechanisms (passive mechanism = not working on electrical, chemical or such other source,) for altering the rate of release of pressure are permitted.

 

Prohibited items

  1. The use of parachutes is not allowed.
  2. Use of materials that release gases or alters the specified pressure is not allowed.
  3. Mechanism to store energy, other than pressurized air is not allowed.

Arena details.

The arena is an open ground. The rocket will be launched vertically upwards.

 

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