出典:Wikipedia
出典:『Wikipedia』 (2011/07/22 13:20 UTC 版)
Space Shuttle main engines (SSMEs) were reusable liquid-fuel rocket engines built by Pratt & Whitney Rocketdyne. Each Space Shuttle ascent to orbit was propelled by three of the fourteen SSMEs used by the NASA Space Shuttle program. After each flight, the three SSMEs were removed from the Space Shuttle orbiter, inspected and refurbished in preparation for reuse on a subsequent flight. The SSME was also designated RS-24 or RS-25 for industrial purposes.