The "father" was soon outgrown

The V-2 was the first space rocket with liquid fuel, turbo pumps, and aerodynamics which could handle supersonic speeds. All the new inventions were also used in the next generations of space rockets, which grew much larger than the V-2. In order to be able to lift still more cargo, extra rocket stages with detachable engines and fuel tanks were added, making the rockets grow. The V-2 was 14 m tall, whereas the giant of the future, the ITS, will measure no less than 122 m.