For demonstration of the rocket principle. The model is half filled with water and placed on a launch pad. An internal overpressure is inflated with an air pump. The rocket is released manually and then flies freely longer than 40 m. Can also be propelled with a carbon dioxide cartridge along a tensioned line. The rocket's traction force, with carbon dioxide cartridge as the driving source, can be measured with a dynamometer and amounts to about 0.3 N.

The model is made of strong plastic, equipped with loops on one wing and a cushioning rubber hat in the nose. The kit includes a rocket, launch pad, air pump, earth nail, water filling funnel and holder for carbon dioxide cartridge.