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Once reached end of location, blinds open to let air through and
sail pulled back to origin. During operation it pulls a cable that
runs an electric generator or mechanical storage (such as a
flywheel, compressed air or compressed magnets).
Benefits: Slowly moving parts, no need for special
permits and no
worries about birds. On building tops can catch a vast amount of
wingspan with a very small imprint and small need for
An old idea. [Vernon, Jul 13 2015]
Another old idea. [Vernon, Jul 13 2015]
Another even earlier (2010) idea of mine
Ground Sail Electric Power
[pashute, Jul 13 2015]
||Use two on opposite cycles, connected by a rope around a pulley.