• Reinforced composite flywheels and shafts 

      John H. Gully; W. Alan Walls; Elvin G. Estes; Steve M. Manifold; Michael L. Spann (United States Patent and Trademark Office, 1994-02-15)
      The maximum safe operating speed or flywheels and shafts made of low tensile strength material is often determined by the speed at which radial tensile stress exceeds a radial tensile stress limit for the material. ...