Water Rocket Forum

Hello, from Portugal

I´m new in water rockets, and want learn more. I hope in this forum you could help to understand some math equation, like this one:

h=(Mi/Mr)*(Mi/Mr)*(Pi/density of water*g)

It looks like an equation for predicting the max altitude using the mass of a filled rocket and the mass of the empty rocket, the density of water, and acceleration due to gravity.

but as it gets to this equation?

Water rocket, is more experience, not theory.