 WEST PALM BEACH, Fla., May 11, 2021 GLOBE NEWSWIRE -- Aerojet Rocketdyne recently completed a successful RL10C-X altitude hot fire test series that put the next generation engine through the rigors of a typical spaceflight mission. Using a test chamber that simulates the vacuum of outer space, the RL10C-X, which produces roughly 24,000 pounds of thrust, was tested in a flight-like configuration to demonstrate the engines capability to complete a typical mission profile, including multiple restarts. 