File:Dome Added to the Space Power Chambers for the Centaur Rocket (GRC-1963-C-65692).jpg

English: This 22.5-foot-diameter domed lid was added to the Space Power Chambers to allow the vertical installation of a Centaur second-stage rocket into the vacuum tank at the National Aeronautics and Space Administration (NASA) Lewis Research Center. The lid could be removed using a crane so that the Centaur could be lowered into the chamber. After a year of additional construction, the new dome and extension were completed in September 1963. The feature became the facility’s distinctive attribute. The modifications to the facility began two years earlier, however. In 1961, NASA Lewis management decided to convert the Altitude Wind Tunnel into two large test chambers and later renamed it the Space Power Chambers. The conversion included the removal of the tunnel’s internal components and the insertion of bulkheads to seal off the new chambers within the tunnel. The 100-foot-long vacuum tank was created in the east leg of the tunnel, which was 31 feet in diameter at one end and 27 feet in diameter at the other. With the transfer of the Centaur second-stage rocket program to NASA Lewis in October 1962, the newly completed Space Power Chambers facility had to be modified to accommodate the space vehicle. The goal of the test engineers was to subject the Centaur to long durations in conditions that would replicate those encountered during its missions in space. The facility was used for a variety of tests on the Centaur second-stage rocket until the early 1970s.