I launch a proprietary 'Rokit' 2-litre-bottle water rocket. A cardboard tube was taped to the bottle to accommodate the supporting launching stick. Also a tennis ball was taped to the end of the bottle to improve stability and cause the rocket to reach a greater height. Release pressure was approximately 40 pounds per square inch. Notice the cloud of spray as the pressurised air inside the bottle punches out past the remaining water.
Pressure when the bung blows out is typically somewhere between 35 and 40 pounds per square inch (psi).
ianrusselluk 4 years ago
lol how much psi was that about
asskicker851 5 years ago