The Solid Fuel Ramjet (SFRJ) and the Hypersonic Dual-Mode Ramjet (DMRJ) are seeing rapid success as the U.S. hikes spending and development of hypersonic weapons. GE Aerospace has shed more light on its hypersonic propulsion programs, announcing on Sep. 22, 2025 the testing of a Solid Fuel Ramjet (SFRJ) propulsion system and a dual-mode rotation-detonation […]