How do parachutes work for a water rocket?

Water rockets do not use parachutes for their operation or flights. Their propulsion and recovery mechanisms function differently:

1. Propulsion: Water rockets generate thrust through a reaction force created by the rapid expulsion of water from a pressurized chamber. By releasing the water under pressure, the rocket experiences an upward thrust that propels it into the air. The pressurized water is typically generated by adding compressed air to a bottle and then releasing it into a nozzle.

2. Recovery: Water rockets do not employ parachutes for recovery. Instead, they rely on a drag device called a "streamer" or "recovery streamer." The streamer is attached to the body of the rocket and creates drag as it moves through the air. This drag causes the rocket to slow down and eventually descend to the ground. The streamer is designed to be lightweight to minimize the impact of added weight on the rocket's performance.

Unlike traditional rockets that use solid or liquid propellants and often require parachutes for recovery, water rockets use water as a propellant and rely on the drag created by a streamer for a controlled descent.