GE had a successful Mach 2.2 captive flight of solid fuel ramjet on F-104 which demonstrated throttleable thrust for evasive, long-range munitions. GE tested atmospheric test of launched airbreathing system (ATLAS) Flight Test Vehicle which marking a major milestone in advancing solid fuel ramjet (SFRJ) propulsion technology. Solid fuel ramjets represent a pivotal advancement in ...

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Link :
https://www.nextbigfuture.com/2025/10/ge-flies-a-solid-fuel-ramjet-could-lead-to-longer-range-hypersonic-missiles.html