Although turbojet and turbofan jet engines are similar, the things that set them apart make them very different. Here's what you need to know.

Between Mach 2 and Mach 3, the turbojet transitions to a ramjet engine, which powers the plane at hypersonic speed. “That's actually pretty tricky and pretty difficult,” Case said.

China has conducted a successful maiden flight of a miniature turbojet engine manufactured entirely with 3D printing, a development that explores new methods for tackling difficulties in aerospace ...