2~6 2.25L coke bottles, scissors, single-sided blades, rubber stoppers, balloon needles, valve cores, staplers, double-sided adhesive tapes, colored decorative paper, tablecloths and other light and airtight materials.

Second, the specific methods

Production process:

Manufacture of the pressure plug: cut off the thicker end of the rubber plug with a knife, with a diameter of 2.3cm, install the valve core, hose and nut through the small hole, and press the rubber plug into the bottle mouth forcibly, so that the part exposed from the bottle mouth is no more than 2 mm; 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.

Manufacture of wings: cut four wings out of cardboard. In order to make the rocket fly stably, the wing must have high hardness. If the hardness of the paper is not enough, two or three pieces can be glued together. After cutting off the wing, the "sticky claws" are alternately folded back to both sides and symmetrically stuck on the lower side of the rocket with transparent tape.

Extended data:

Water rocket is a toy designed by using mass ratio and air pressure, and it is also one of the famous cases in physics teaching. It can cultivate students' interest in learning physics, and the physical principles contained in it are an important basis for understanding mechanics in physics.

Water rocket is also called air pressure water jet rocket and water propulsion rocket. It is made of waste beverage bottles into power cabin, arrow body, arrow body, tail wing and parachute.

Baidu encyclopedia-water rocket