H2-View News: Sierra Space completes hydrogen-powered engine testing for US space missions
Administrator2025-02-12T13:38:05+00:00Research Laboratory (AFRL) was aimed at continuing to mature upper stage engines to fulfil future National Security Space Launch (NSSL) missions. NSSL missions are intended to assure the US Department of Defence (DOD) access to space. The US Air Force has been in the process of selecting its next generation NSSL vehicles since 2018. VR35K-A [...]

