محرك صاروخي
In 1952, [[Osamu Tezuka]]'s [[manga]] "Tetsuwan Atom", more popularly known in the West as "[[Astro Boy]]", was published. The series focused upon a robot boy built by a [[scientist]] to replace his deceased son. Being built from an incomplete robot originally intended for [[military]] purposes Astro Boy possessed amazing powers such as flight through [[Rocket engine|thrusters]] in his feet and the incredible mechanical strength of his limbs.