Answer: Robert H. Goddard
Explanation: he developed and flew the first liquid-propellant rocket
Answer:
-Technical Societies
Explanation:
Rocket enthusiasts and rocket clubs were active in Germany, the US, Russia, and other countries. Experimental rockets were designed, tested, and sometimes flown. Some of the experiments used liquid fuel, though solid-fuel rockets were also developed. In 1932, the rocket motor was developed as a reusable method for the flight of a rocket.
