a water rocket for playing blast off nozzle stroke control system

摘要

The present invention relates to a toy rocket launch nozzle stroke control device for filling a high-pressure air into a PET bottle by filling some of the water in the PET bottle, the PET bottle is opened instantly, and the toy is fired with the propulsion force of the built-in water sprayed at high pressure. It is about the improvement of the launch nozzle which consists of conical packing among the core parts of the water rocket launching platform used for the purpose.;There are two types of PET bottlelets on the market, narrow and wide, so that the water rocket launch pad is set at a constant distance from the lower firing nozzle and the socket that unlocks the border of the PET bottle from the top. In many cases, water is leaked in the process of compressing air, so it is often impossible to launch.;The present invention provides a device that allows the firing nozzle to be moved up and down while rotating the threaded worm interlocked with the worm screw of the circular screw shaft, so that the inner diameter of the PET bottle bottle is narrow or wide. To provide a toy rocket launch nozzle stroke control device that can be mounted and fired by all.