Over what did Otto Lilienthal gain control for his aircrafts?
Speed
Direction
Both speed and direction
Neither, it was uncontrolled flight
Answer
Otto Lilienthal did not gain control over his aircrafts. His aircrafts were gliders that were unable to fly under their own power. They were able to glide through the air, but they could not be controlled in any way.
Flight of the Eagle: Testing Your Knowledge on Otto Lilienthal, the German Aviation Pioneer