At KiteSim our goal is to develop a realistic and fun kitesurfing simulator that allows beginners to start kitesurfing in an easy and safe way. But also allows pro kitesurfers to train in perfect conditions. We are developing the KiteSim simulator in collaboration with the TU-Delft and design agency Frank & Frens. The simulator is based on a realistic computer model that simulates the forces on the kite, the rider and the lines. These forces are exerted trough the simulator and experienced by the rider. The actions of the rider are measured and used as input for the simulator.