Couple of segways brought me to this. Really worth a look, and stay with it right to the end. Just amazing stuff. By the way, when Archemedes made his screw for lifting water over 2000 years ago, he probably knew intuitively that it would work in reverse too. But no human on the planet did this till someone in Germany invented the (very very efficient) hydrodynamic Screw around 1990. https://youtube/watch?v=nZXjUqLMgxM#t=3499
Posted on: Sun, 30 Nov 2014 06:27:05 +0000
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