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 combustion ramjet at the Kennedy Space Center and the GE Aerospace Research Center in New York, respectively. The SFRJ was installed on the Atmospheric Test Launched Airbreathing System (ATLAS) Flight Test Vehicle that underwent “a successful supersonic captive carry” flight test. Contents The Solid Fuel Ramjet (SFRJ) and the Hypersonic Dual-Mode Ramjet (DMRJ) are seeing rapid success as the U.S. hikes spending and development

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