How to Build a Water Rocket

Figure 3.1: First, collect some unused soft drink bottles. From the bottle cap, cut 1/3 of the length of the bottle. This part act as nose cone of the water rocket and the objective is to create an aerodynamic to the rocket so that air resistance is reduced.



Figure 3.2: Using 3/8-inch drill bit, drill a hole at the center of the rubber cork. Hold the rubber cork steady with G-clamp. Make sure the angle of the drill bit is perpendicular to the surface of the rubber cork.Then, screw the tire valve from the smaller surface of the rubber cork.



Figure 3.3: Plug the rubber cork on the bottle's mouth.



Figure 3.4: Place the nose cone at the bottom of the bottle.



Figure 3.5: Now, you have a water rocket and is ready to be launched.