Combining the technologies could improve efficiency enough to make hypersonic projectiles much more affordable.
GE Aerospace and Lockheed Martin completed a series of engine tests demonstrating the viability of a liquid-fueled rotating ...
A series of tests have demonstrated the viability of a liquid-fueled rotating detonation ramjet for hypersonic missiles, ...
TL;DR: A hypersonic dual-mode ramjet engine is a high-speed air-breathing jet engine capable of operating efficiently at both lower and extremely high Mach speeds by utilizing dual combustion modes.