The main purpose of this thesis was to implement the real-time simulation model of the Bell Aircraft Corporation XV-15 aircraft to give a face to the mathematical model describing the flight mechanics of the tilt-rotor. The mathematical model has been developed thanks to several thesis works carried out at the Politecnico di Torino in collaboration with the ZHAW University located in Winterthur, Switzerland, and includes simplified mathematical models for the aerodynamics of the whole aircraft, rotors, and engine dynamics. The author's task was therefore to take the model in question and make it work with a graphic environment that reproduces the aircraft following the commands given by the pilot.