In a significant development from few months back, DRDO successfully tested a cutting-edge Active Cooled Scramjet Combustor ...

The HAWC prototype is powered by a supersonic combustion ramjet, or scramjet, which uses supersonic air produced during initial acceleration to reach speeds greater than Mach 5, or five times the ...

Source: Wikimedia Commons The combustion inside a ramjet must occur at subsonic ... to why ramjet engines can’t achieve supersonic speeds, rather scramjet engines are needed to do so.