====== Heat Engine (rotational) ======

{{tag> rubber band disk wheel needs_review untagged unlocated}}

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===== Description =====

A conversation of heat energy to kinetic energy which utilizes thermal contraction.


heat contraction, Newton's second law  





===== Purpose =====


A demonstration of conversation of heat energy to kinetic energy which utilizes thermal contraction.  



===== Apparatus =====


Wheel and shade, spotlight  



===== Setup =====


The wheel consists of a light delicately suspended wheel with rubber-band spokes. The lamp is placed so that it heats up a portion of the spokes. When these rubber bands heat up, the contract and thus offset the balance of the wheel, causing it to rotate.  



===== Notes =====


Since the rubber bands tend to stress over time, the spokes become easily damaged with age. This demonstration often needs to be restrung and because this is a long and laborious process, a 3 DAY NOTICE for this demo is required.  

Useful Links: 	  
Wait a minute! Things expand when they are heated don't they? [[ http://newton.dep.anl.gov/askasci/gen99/gen99997.htm |  Ask A Scientist ]]may be able to help you out here.   

Updated on: 06/19/13

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| **Location** | ---- |
| **Maker** | Unknown |
| **Current State** | Working |
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