Do scramjet engines exist?
While scramjet technology has been under development since the 1950s, only very recently have scramjets successfully achieved powered flight. The compression, combustion, and expansion regions of: (a) turbojet, (b) ramjet, and (c) scramjet engines. Russia, USA, China and India are the countries having scramjet technology. You can read about the Hypersonic Technology Demonstrator Vehicle (HSTDV) – unmanned scramjet technology of DRDO in the given link. Further readings: Advanced Technology Vehicle – India, one of the 4 Countries To Develop Scramjet Engine.The realm of scramjet technology is an exclusive one, with only a handful of nations having successfully developed and tested this advanced technology. The nations that have made significant strides in scramjet technology include Russia, the United States, China, and India.Russian engineers developed scramjet engine achieving Mach twenty-five breaking all previous speed records Russia’s Central Institute of Aviation Motors successfully tested a hypersonic scramjet engine that reached speeds of 30,625 kilometers per hour (Mach 25) during atmospheric flight in November 2025.
Which Indian missile uses a scramjet engine?
Hypersonic Cruise Missiles (HCMs) Powered by scramjet engines throughout their flight. They can fly at low altitudes and change direction, making interception extremely difficult. DRDO successfully conducted a ground test of a full-scale, actively cooled, long-duration scramjet engine. This achievement significantly strengthens India’s position in advanced hypersonic technologies and paves the way for the development of future Hypersonic Cruise Missiles (HCMs).
Which is faster scramjet or ramjet?
Yes, Scramjet is faster than ramjet. Ramjet operates at supersonic speeds and scramjet operates at hypersonic speeds. You can read about the Hypersonic Technology Demonstrator Vehicle (HSTDV) – unmanned scramjet technology of DRDO in the given link. Results show that the performance boundary between ramjets and scramjets occurs near Mach 7. Specifically, at Mach 6, the ramjet exhibits a 1290 m/s higher specific impulse than the scramjet; however, at Mach 7, their performance becomes comparable.