How Do Different Valves and Nozzles Work in Water Rockets?

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SUMMARY

This discussion focuses on the mechanics of valves and nozzles in water rockets, emphasizing the importance of using reliable release mechanisms to achieve maximum pressure. A simple design involves using a cork or a tire valve, but these may not withstand maximum pressure. The discussion highlights a popular release mechanism invented by Clark, which utilizes plastic cable ties to secure the rocket motor. This method ensures a more effective launch by preventing premature release.

PREREQUISITES
  • Understanding of basic water rocket design principles
  • Familiarity with pressure dynamics in fluid systems
  • Knowledge of valve types and their applications
  • Experience with construction materials and techniques for model rockets
NEXT STEPS
  • Research advanced valve designs for water rockets, such as pneumatic valves
  • Explore nozzle shapes and their impact on rocket performance
  • Learn about pressure testing methods for water rocket components
  • Investigate construction techniques for secure attachment of nozzles and valves
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This discussion is beneficial for hobbyists, educators, and engineers interested in water rocket design, construction, and optimization. It provides insights for anyone looking to enhance their understanding of fluid dynamics in model rocketry.

mickdriscoll
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Can someone please explain how a water rocket valve will work. i know you could use a cork and a tyre valve as a very simple design with the bottle opening being the nozzle shape. but what are some other valves that ensure the bottle is pumped to the maximum pressure it can hold (a cork will most likely be forced out before maximum pressure is reached. and what could be a method of attaching a nozzle as well?
 
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Water rocket launcher construction

There is one concept for the release mechanism that is very popular, invented by Clark, that uses plastic cable-ties as the catch to hold the rocket motor by the ring on the neck.

See:my construction article including links to Clark's site and others.

The basic mechanism:

ties.png


In the latched state:
latched.png


Hope this helps!
 

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