Electric Planes Take to the Sky at NASA Green Flight Challenge

There is no roar of a 3,000 horsepower V-12 at an electric airplane race. Instead there is only the whir of an electric motor as pilots entered in the NASA Green Flight Challenge take off into the morning sky above the Sonoma County vineyards.

Source: http://www.wired.com/autopia/2011/09/electric-airplanes-race-at-nasa-greenflight-challenge/

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