Abstract: A method and system for developing a propulsive force which can be utilized for driving different types of water, air or land vehicles. The propulsive force is developed by rotating a propeller shaft with four generally flat propeller blades mounted on two perpendicular intercrossed axles, which are fixed to the propeller shaft in a plane perpendicular to its axis. The surface of each blade is lying in a plane perpendicular to the axle on which it is mounted and the blades are rotated in these planes around these intercrossed axles with the same speed in different directions, so that the adjacent propeller blades are rotated clockwise and counterclockwise not interfering with each other.