The main objective of this thesis is to develop a Level 1 simulator specifically for the Bell 412 helicopter to study the Vortex Ring State (VRS). This is an unsteady aerodynamic condition that occurs at certain descent rates and low forward speeds. Entering the VRS causes a sudden loss of thrust, an increase in descent rate and a loss of controllability. It is therefore necessary that the flight envelope avoids this possibility and, if this state occurs, pilots are trained in recovery manoeuvres to get out. This is the context in which the project was developed to provide a satisfactory model for possible pilot training.