• Version 1.
  • With boiling water and ice water reservoirs, this nitinol engine runs so fast, water is thrown out to the side.
  • Direction of rotation depends on orientation of hot and cold reservoirs.
  • The engine may need a little help getting started.

        (place engine on long towel)
        (show how to wind wire around pulleys)

  • Version 2.
  • Place the bottom edge of the brass pulley into 50° - 70° water, do not immerse the bearing.
  • The engine can be made to rotate in either direction depending on which way you push the plastic pulley.

        (place beaker on hotpad)
        (set out a beaker of cold water)