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  About Rockets
 


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  Rocket Research 101
     - Thrust
     - Acceleration
  Rocket Research 102
  Rocket Research 103

  Educator Section
  Rocket Safety
  The Simulators
  Install 3D Simulator
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Welcome to Rocket Research 101

Propulsion - Questions

 

Do I have to use water?
Why can’t I just use pressurized air?

Let’s go to the simulator and try!

Image of pressure input field
on simulator

Add air (increase the air pressure) to the pop bottle and Launch to see the thrust produced.

NOTE: Most pumps (such as a bicycle pump) read out pressurized air in pounds per square inch (lb/in2, or PSI). In science the metric system is preferred, where pressure is measured in Newtons per square meter (N/m2) also known as "Pascals" (Pa).

How do you convert from PSI to Pascals? Learn how.

Click here to access the Simulator.


Now:

What happens if I add Water?
Is more water better?

Back to the simulator!

Image of Water level and Airp pressure fields in simulator

Try different amounts of water and air pressure and log the results.

Click here to access the simulator.


Conclusions:

Which gave the fastest speed, water or air?

a) water
b) air

 

 


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Any comments, concerns, or questions should be addressed to:    

Developer: David Mazza    
Responsible NASA Official: Jo Ann Charleston    

 
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Editor: Tom Benson
NASA Official: Tom Benson
Last Updated: Jun 12 2014

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