Aerojet Rocketdyne Powers Launch of ULAâs Delta IV Heavy to Orbit VANDENBERG AIR FORCE BASE, Calif., April 26, 2021 - Engines supplied by Aerojet Rocketdyne provided the lifting power for today's successful launch of a United Launch Alliance (ULA) Delta IV Heavy rocket carrying a classified U.S. National Reconnaissance Office (NRO) NROL-82 payload. 'When it comes to launching high-value national security payloads, America puts its trust in our propulsion systems,' said Eileen P. Drake, Aerojet Rocketdyne CEO and president. 'Our reliable, flight-proven RS-68 and RL10 engines have supported ULA's Delta IV Heavy missions since the rocket's first flight in 2004 and have continued with 100% mission success for nearly two decades.'