Jack Parsons, American chemist and engineer (born 1914)

Jack Parsons

American rocket engineer (1914–1952)

John Whiteside Parsons was an American rocket engineer, chemist, and Thelemite occultist. Parsons was one of the principal founders of both the Jet Propulsion Laboratory (JPL) and Aerojet. He invented the first rocket engine to use a castable, composite rocket propellant, and…