New Delhi: The first form of man-made flying objects were kites.Later the invention of hydrogen led to the invention of hydrogen balloons in the 18th century. In the 19th century experiments with gliders provided the
world s 10 weird looking aircraft everImage Source : INDIATV
2. The Hiller X-18
This plane was the testing ground for tilt-wing and vertical takeoff and landing planes.
It was conceived in 1955 and had its first flight in 1959. The plane had 20 successful flights.