Aerojet Rocketdyne’s planned replacement for the Russian-made RD-180 rocket, in use in military launches, passed its critical design review, the company announced Monday. The 500,000-pound thrust, liquid-fueled rocket, known as AR1, is planned for flight in 2019 as part of a Congressional mandate to replace the RD-180 with a US-made engine. The design review proves the company finalized its design and confirms it meets requirements for National Security Space missions, Aerojet Rocketdyne CEO Eileen Drake said in a release. The Air Force has awarded contracts to Aerojet Rocketdyne, United Launch Alliance, SpaceX, and Orbital ATK for development work on possible RD-180 replacements with a congressionally mandated 2019 deadline for deciding on the replacement.
B-52 Engine, Radar Upgrades Hit New Milestones
Sept. 15, 2026
The Air Force’s program to re-engine the B-52H Stratofortress has moved from its technology maturation and risk reduction phase to engineering and manufacturing development, marking a new milestone in the sweeping overhaul of the Cold War-era bomber, a top official said Sept. 15.
