Propulsion Systems Laboratory – How PSL Worked
How PSL Worked A brief overview of how the Propulsion Systems Laboratory (PSL) No. 1 and 2 was able to test large engines in simulated altitude conditions. NASA Glenn Research CenterHistoric Facilities Propulsion Systems Laboratory (PSL) No. 1 and 2 Overview Glossary Overview The Propulsion Systems Laboratory (PSL) at NASA Glenn Research Center originally contained two altitude chambers for testing full-scale turbojet, ramjet, and rocket engines in conditions that replicated those encountered during flight. A large hatch allowed the installation of the engine onto a moveable thrust stand within the test section. Compressors in the Equipment Building pumped air at high speeds towards one of the test chambers. The air was conditioned as it passed through the refrigeration equipment, heaters, and dryers to produce the temperatures found at high altitudes or supersonic speeds. Large exhausters, also located in the Equipment Building, reduced the air pressure within the test chamber to create the thin air of high altitudes. As...