How much water?

One of the more common questions that's often asked is how much water should I put in my water rocket? The standard answer usually is 1/3 of the rocket capacity, but because the ideal amount of water is dependent on a number of factors this amount is rarely exactly 1/3 .

This week we look at how some of these different factors affect the optimum water amount:

http://www.AirCommandRockets.com/water.htm

The article compares how the optimum changes with pressure, nozzle size, weight and liquid density.