Look what I made.

[birdman]

^ That link didn't work for me, even when I truncated it to:

http://www.whispergen-europe.com

Weird, it used to work, and all the other subsidiary pages work.
Try this:
http://www.whispergen-europe.com/productspec_en.php?fm=whispergen&fp=Product%20Specs

[230RN]

Oh, well, other examples abound.  Solar 10KW generator:

https://www.youtube.com/watch?v=EahfGfDdgNY

Don't know what my problem was with that first link, so thanks.

Not to overpower anyone with examples, but here's a real pretty one with a magnetic displacer in a clear glass (quartz?) displacement chamber.

https://www.youtube.com/watch?v=VpZpjH71320&feature=player_detailpage

(Love that one!  Freakin' work of art!)

Terry