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water rocket

How to Make a Water Rocket Step By Step Instructions

How to Make a Water Rocket Step By Step Instructions

Introduction to Water Rocket

To make water rocket is one of the practical demonstration of construction and working of  rockets. It can be made by the simple household material like plastic bottles, electrical tape, polythene bags etc. It is an interesting project to explain the working and aerodynamics of a rocket in which pressurized air and water are used as fuel of the rocket.

Material Required to make water rocket

To make water rocket, following materials are required:

Carbonated Bottles

2 carbonated bottles are required to make water rocket: one is for body of water rocket and other for skirt of water rocket to which fins will be attached. The carbonated bottles are recommended because they do not burst and can bear high air pressure. It should be kept in mind that bottles with less designing and curves must be used to minimize weak points in bottles.

 Plastic File

One plastic file is needed to make four fins of water rocket; fins help the rocket in flight by cutting the air around. As water is used as fuel, cardboard or paper fins must not be used as they get wet, bend or tear apart.

 Polythene Bags

Polythene bags are served as shock absorber when rocket return to the ground. It is filled in the head of the rocket so that it may not get damaged.

  • A Pair Of Scissor.
  • Electrical Tape.
  • Marker.
  • A Ruler.
Material required for making Water Rocket

Material required for making Water Rocket

 

Steps to make Water Rocket

The construction can be divided into 3 parts to make water rocket. The parts are Nose cone, skirt and fins. Making of each part and its significance is described as under:

Making Of Nose Cone

Nose cone is one of the important part in making of water rocket. It helps in flight of the rocket due to its aerodynamic shape by minimizing air drag or resistance which opposes the rocket's motion. The polythene bags filled in the cone work as shock absorber when it returns to the ground

One of the carbonated bottles is cut with the help of scissor from the upper side to make rocket nose cone which is of 3 inches.

One of the carbonated bottles is cut with the help of scissor from the upper side to make rocket nose cone which is of 3 inches.

 

⦁Fix the nose cone at the lower part of the other bottle with the help of tape.

Fix the nose cone at the lower part of the other bottle with the help of tape.

 

Fill the nose cone with the polythene bags, and cover the upper part of the cone with the tape.

Fill the nose cone with the polythene bags, and cover the upper part of the cone with the tape.

Making Of Skirt

Skirt is made to give the rocket proper shape and space to attach the fins on it. It can be made by using another carbonated bottle or by using plastic file. It must be equally divided into 4 parts so that 4 wings can attached to it with equal spacing.

The lower part of the bottle (used to make nose cone) can be used to make skirt of the water rocket. The length of skirt is 4 inches.

The lower part of the bottle (used to make nose cone) can be used to make skirt of the water rocket. The length of skirt is 4 inches.

 

Wrap the skirt around the bottle and divide the circumference in four equal parts and mark on it.

Wrap the skirt around the bottle and divide the circumference in four equal parts and mark on it.

The skirt is fixed to the upper part of another bottle with the help of tape in such a way that the neck of bottle is slightly below the skirt.

The skirt is fixed to the upper part of another bottle with the help of tape in such a way that the neck of bottle is slightly below the skirt.

Making of fins

The fins are the most important part of water rocket that are used for controlling the direction and minimizing the air drag around the rocket while flying. It also provides stability to the rocket to keep flying without being tumbled or wobbled in the air.

Mark 1cm from the width of the fins and draw the line. Divide the length of the fins in four equal parts i.e. one inch.

Mark 1cm from the width of the fins and draw the line. Divide the length of the fins in four equal parts i.e. one inch.

 

From the opposite side, mark 1.5 inch and make a diagonal to the width.

From the opposite side, mark 1.5 inch and make a diagonal to the width.

 

Separate the fins from the sheet and cut them out carefully along the marks with the help of scissor.

Separate the fins from the sheet and cut them out carefully along the marks with the help of scissor.

 

Cut the 1 inch division along the length of the fin up to 1 cm mark and bend the cuts in alternative manner.

Cut the 1 inch division along the length of the fin up to 1 cm mark and bend the cuts in alternative manner.

 

Prepare all four fins in the same manner.

Prepare all four fins in the same manner.

 

Attach the fins to the skirt on the marked line with the help of tape in such a way the diagonal must be point towards the nose cone.

Attach the fins to the skirt on the marked line with the help of tape in such a way the diagonal must be point towards the nose cone.

 

Water rocket is ready for flight now.

Water rocket is ready for flight now.

 

Watch Video:

See Also:

Water rocket construction

Make a Water Rocket for Competition

Making of Water Rocket

PET Bottle Water Rocket

Download Water Rocket Manual