Memory Metal Heat Engine
Celsius Immersion Thermometer
*Reservoir / heating cup shown in product photo is for illustration purposes only and not included.
This ingenious memory metal engine exploits a property of the Nitinol metal alloy that makes it want to return to the shape it was originally formed in when produced. This property of Nitinol alloy is known as the "memory effect". Nitinol wire is produced in straight lengths at a temperature of @600 Degrees Celsius. After it is allowed to cool, it is manually deformed and joined into a closed loop and positioned around the pulleys. When submerged into hot water (@ 80 Degrees C), the Nitinol wire tries to return to its original straight shape. The Nitinol exerts torque on the lower (smaller) wheel as it tries (in vein) to return to its original shape. This torque spins the lower wheel, and more nitinol is drawn into the hot water. The other side of the loop is cooled by the air which momentarily relaxes the wire as it passes around the larger pulley. The process will repeat as long as the water remains warm enough.
Overall Length: 10" / 25cm
Thickness: @ 1"
Weight: 4 oz.
Minimum Operating Temperature: 45 Deg. C
Maximum Operating Temperature: 90 Deg. C