1. Material preparation

2 to 6 2.25L Coke bottles, scissors, single-sided blade, rubber stopper, ball air needle, valve core, stapler, double Surface glue, colored decorative paper. Lightweight and airtight materials such as tablecloths.

2. Specific methods

Production process:

Preparation of booster plug: Use a knife to cut off the thicker end of the rubber plug. The diameter of the cut is 2.3cm. Install the valve core, hose, and nut through the small hole, and force the rubber stopper into the bottle mouth so that the part exposed outside the bottle mouth does not exceed about 2mm; use scissors to dig a hole with a diameter of about 12mm in the middle of the beverage bottle cap. , so that only the valve core is exposed when the bottle cap is tightened.

Preparation of side wings: Cut out four side wings with pieces of cardboard. In order to make the rocket have better stability during flight, the side wings must have higher hardness. If the paper pieces are not hard enough, you can Two or three pieces are glued together to make it. After cutting the side wings, alternately fold the "pasting claws" back on both sides and stick them symmetrically on the lower side of the rocket with transparent tape.

Extended information:

The water rocket is a toy designed using mass ratio and air pressure. It is also one of the famous cases in physics teaching, which can cultivate students' ability to learn physics. Interest, and the physical principles contained in it are an important basis for understanding mechanics in physics.

Water rockets are also called pneumatic water-jet rockets and water-propelled rockets. It uses discarded beverage bottles to make power cabins, rocket bodies, arrows, tail fins, and parachutes.

Baidu Encyclopedia—Water Rocket