sterling engines run off of the difference in temperature between two substances, liquid primarily. were the ancient henges used for this purpose, to irrigate water, grind grains etc? Ii have discovered that this is highly possible. some interesting facts in this regard:
1. here is the modern solar sterling engine. look familiar?:
http://www.stirlingengine.co.uk/d.asp?product=KS90_SOL_KIT
2. stonehenge is made of alternating white and black granite pillars, which would absorb heat differently from the sun. in the summer the surface would be hotter, in the winter the ground...
3. three mounting points for 'posts' of some sort are found adjacent to stonehenge, which could hold a wheel of some sort.
4. a moat surrounds the henge, which could be used for altering temperature somehow
I am no expert on any of this, i am reaching out to the community to help me understand this further. comments welcome!
*edited to get the link to work right
