Water rockets are created from plastic bottles, made aerodynamic by nose cones and fins. The rocket is part filled with water, and air is pumped in with a foot pump. When the rocket is released ...

Water gets pushed down, bottle flies up. Done? Oh no! The first step into more sophistication is the aerodynamics. But honestly, if you make something vaguely rocket-shaped with fins, it’ll ...

Many of us made soda bottle rockets for science ... a tire pump and some cardboard fins. [François Gissy] modified the design but not the principle for his water trike which reached 261 kph ...