
One object of the present invention is to avoid loss of energy during deceleration of a vehicle. Another object is to decelerate an aircraft after its landing and to utilize the energy of said deceleration to taxi that aircraft or for its immediate take-off. This invention can be incorporated in a wheel within which a plurality of energy collectors, or spheres 8', can be housed circumferentially and be so connected as to spin, each about its own axis 20, and to accelerate under the impact of cen...











