DESIGN AND DEVELOPMENT OF WATER ROCKET
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Rocket technology dates back to the 1stcentury BC, when the Hero of Alexandria came up with an engine which works on steam. Right from that period there have been numerous improvements in the rocket technology. Understanding of actual rocket and its performance can be carried out with water rocket, which is easy, safe and less expensive. This paper deals with the design and development of water rocket and its parachute. Water rocket works on the principle of Newton’s Third Law, where water is used as its reaction mass. The compressed gas forces out the water creating an equal and opposite reaction. In this paper a conceptual design methodology is followed to design parachute and water rocket using a 2 L bottle having a diameter of 8.5 cm to find out different performance parameters. The calculated velocity, thrust and range are 26.24 m/s, 31.72 kg and 181.44 m respectively. To achieve 2 m/s terminal velocity of descending rocket, parachute has been designed of 50 cm in diameter. On basis of designed parameters various rockets has been developed and tested successfully for different percentage of water and internal pressure. This paper gives a design and development methodology for any such water rocket with parachute, which can be adopted for further usage.
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