NASA Glenn: 1952–1957
High Energy Propulsion: The Lewis Flight Propulsion Laboratory refocused again in 1949 and expanded its research, particularly in regards to the study of rocket propellants. This led to the determination that the lightweight and highly reactive liquid hydrogen could be safely used as a fuel. The improvement of jet and ramjet engines continued throughout the 1950s, and the icing program continued to make strides. The lab also led a presidentially mandated effort to reduce fatalities in low-speed aircraft crashes. In the mid-1950s NACA researchers began to study nuclear propulsion for both aircraft and rockets.