Plum Brook Station In the early 1960s and 1970s, NASA developed many facilities to ground test flight components before the components are placed into space. Included in these facilities was Plum Brook Station, which housed four ground test facilities for simulating a space environment. Plum Brook was mothballed in the late 1970s. In 1987, Plum Brook was reactivated. Plum Brook has the following facilities which have been used for tests on the Centaur/RL-10. Spacecraft Propulsion Research Facility: This is the largest space environment test chamber in the U.S. for full-scale rocket engine testing at up to 400,000 lb thrust. Designed to test liquid hydrogen/oxygen rocket engines, it houses a 38 ft diameter by 62 foot high stainless steel test chamber. A separate control and data building is located a safe distance from the test facility. The facility can provide sustained high vacuum (10 to -6 power torr), solar thermal simulation via quartz lamp array, a 250 ton floor load capacity, an LH2 supply to the test articles via vacuum jacketed piping and installed chamber penetrations, a 200,000 gal LH2 storage tank, a 19,000 gal propellant safety dump tank and a 6,000 gal LO2 oxidizer safety dump tank. The facility has a water spray chamber/steam ejector system to cool and remove rocket exhaust. Cryogenic Propellant Tank Facility: The cryogenic propellant tank facility is a 25 ft diameter space environment with a 20 ft diameter door. The facility's design and construction allow large-scale LH2 experiments to be conducted safely.