Arrival of Equipment for the New Propulsion Systems Laboratory A caravan of large steel castings arrived at the National Advisory Committee for Aeronautics (NACA) Lewis Flight Propulsion Laboratory in January 1951. These pieces would serve as the two 14-foot diameter test chambers in the new Propulsion Systems Laboratory (PSL). NACA Lewis specialized in aircraft engines and offered many engine test facilities. In the late 1940s, however, the NACA realized a larger facility was required to test the newest jet engines. When completed in October 1952, PSL became the nation’s most powerful facility for testing full-scale engines at simulated flight altitudes. NACA engineers began designing the PSL in 1947, and excavations commenced in September 1949. In the spring of 1950, the facility’s supports were erected, and the two large exhaust gas coolers were installed. Work on the Access Building began in early 1951 with the arrival of the large test section pieces, seen in this photograph. The massive pieces were delivered to the area from the Henry Pratt Company by rail and then loaded on a series of flatbed trucks that transported them to Lewis. The nearest vehicle has one of the clamshell access hatches. PSL was initially used to study the jet engines of the early 1950s and ramjets for missile programs such as Navaho and Bomarc. With the advent of the space program in the late 1950s, the facility was used to investigate complex rocket engines, including the Pratt and Whitney RL-10.
