Abstract: Method for generating a force vector, comprising the steps of: -providing at least a first mass and a second mass, -making the first mass rotate around an axis of rotation, -changing the distance between the first mass and the axis of rotation between two extreme positions while rotating the first mass, -making the second mass move around an axis of rotation, -changing the distance between the second mass and the axis of rotation between extreme positions while rotating the second mass, -making the masses move in opposite direction with respect to each other, -subjecting the masses to a deceleration phase and a subsequent acceleration phase while changing the direction of movement of said masses between the extreme positions, -making each acceleration phase of said masses directly adjoin a subsequent decelerating phase.