4 ms·

A rubber band driven toy plane wound by a child can fly for minutes. I'm not sure birds expend orders of magnitude less energy than that.

• TeMPOraL 9y ago
  Can it intentionally maneuver? Avoid obstacles? Reach goals? Land and take off again, by itself?
  • varjag 9y ago
    Yeah it can not shit on my head too. How is that relevant to the physics of flight?