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Flying Wind Turbines (revisited)(again)

http://www.ted.com/talks/saul_griffith_on_kites_as_the_future_of_renewable_energy.html

I admire his enthusiasm.

His demo model looks to be using the string to pull the generator on the ground (the kite is being made to do circles in the sky). This gets around the current problem but adds back in the size of the rope and then lovely orthogonal challenges.