Hmph.

First, go listen to this: http://www.youtube.com/watch?v=_vy_G5q0Pwg

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Seems some of my ideas are already taken:

1) http://www.youtube.com/watch?v=z0_nuvPKIi8
2) http://en.wikipedia.org/wiki/Stirling_engine & http://www.youtube.com/watch?v=UvrBzwBIFhM
3) http://engineeringworks.tamu.edu/index.php/2010/old-technology-new-promise/