4F30.60 - Nitinol Wire - Memory Wire

See paragraph one in the procedure section.
See paragraph three in the procedure section.
Code Number:
Demo Title:
Nitinol Wire - Memory Wire
Crystal Formation - Crystal States
Area of Study:
Heat & Fluids
Thermobile, Memory wire with green bead ends, 'ICE' memory wire.

All of these wire will work if dipped in water that has been heated to about 160 degrees F. or 75 degrees C. Lower the brass wheel of the thermobile into the heated water and the wire will try to straighten out which makes the thermobile turn. Bend the green beaded wire to any shape you want and then dip it into the hot water and watch it straighten out. Bend the 'ICE' wire to a different shape and when it is dipped into the hot water it will regain its 'ICE' shape.

The nitinol wire windmill also works by immersing the lower pulley into hot water. 

  • William Kopp, Arthur Schmidt, Ed McNeil, "The Icemobile", TPT, Vol. 23, # 6, Sept. 1985, p. 375 - 376.
  • H. Richard Crane, "More on the Thermobile: Power from Wire that Remembers", TPT, Vol. 23, # 4, Apr. 1985, p. 238.
  • Ed McNeil, Norbert Zarumba, "A Mystery Heat (?) Engine", TPT, Vol. 22, # 6, Sept. 1984, p. 400 -  401.
  • A. D. Johnson and J. L. McNichols, Jr., "Comments on 'Demonstration Solid State Engine' [Am. J. Phys. 52, 1144 (1984)]", AJP, Vol. 54, #8, Aug. 1986, p. 745.
  • R. D. Spence and Michael J. Harrison, "Demonstration Solid State Engine", AJP, Vol. 52, #12, Dec. 1984, p. 1144.
  • Jearl Walker,  "Wire That "Remembers" Its Shape Is Put to Work Running an Engine",  The Amateur Scientist, May, 1986.

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