G+_George Kozi Posted December 12, 2015 Share Posted December 12, 2015 Originally shared by Interesting Engineering Link to comment Share on other sites More sharing options...
G+_Brian Goossen Posted December 12, 2015 Share Posted December 12, 2015 How can it maneuver with only "one propeller"? Link to comment Share on other sites More sharing options...
G+_Ben Yanke Posted December 13, 2015 Share Posted December 13, 2015 I wonder if it's two stacked ones? idk Link to comment Share on other sites More sharing options...
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