Hydraulic catapult represents an innovation in the world of adrenaline adventures which is becoming increasingly popular. Catapult works by accelerating the circle with a construction arm and shoots a person into the water in the highest position. In doing so, we must be careful that the launch, flight and landing in the water are safe. The catapult model of dimensions 4000 mm x 1000 mm x 1100 mm was designed based on analytical calculations. We have calculated the highest flight height, the speed at landing, the distance from the pivot to the launch and the flight length. The 3-D model of the catapult was drawn with the SolidWorks software. In the experimental part of the final project we made a smaller prototype dimension of 2000 mm x 300 mm x 445 mm with which we measured the length of the flight and the time of the launch. The value of the longest range of missile was 9,1 m. The minimum time taken to launch the load from the test catapult was 0,292 s. The prototype results were then compared with analytical calculations.