The Solid Fuel Ramjet (SFRJ) and the Hypersonic Dual-Mode Ramjet (DMRJ) are seeing rapid success as the U.S. hikes spending ...

In brief: Researchers in China have successfully tested the world's first boron ramjet engine that can operate both in the air and underwater. The engine was originally conceived for hypersonic ...

A jet engine is any engine that can propel an aircraft of some kind via rearward expulsion of a jet of fluid, typically a hot exhaust gas that the engine generates by drawing in fuel from the ...

China has tested a powerful engine that can carry weapons at remarkable speeds through both air and water. The novel engine achieved 90% efficiency in laboratory tests, which were conducted in ...