sentences:  He invented the first rocket engine to use a castable, composite rocket propellant, and pioneered the advancement of both liquid-fuel and solid-fuel rockets.Born in Los Angeles, Parsons was raised by a wealthy family on Orange Grove Avenue in Pasadena.Inspired by science fiction literature, he developed an interest in rocketry in his childhood and in 1928 began amateur rocket experiments with school friend Edward S. Forman.