The XB-70 Valkyrie is one of the most amazing machines that ever took flight. Not only was it absolutely huge, with its “six pack” of General Electric YJ93 turbojet engines, but its long ...

The six engines were General Electric YJ93-GE-3 turbojet, which ran on JP-6 jet fuel. Each engine produced 28,000 pounds of thrust with the afterburners engaged and 19,900 pounds of thrust without ...

Following development of the YJ93-GE-3 turbojets for the Mach 3-capable XB-70 Valkyrie, the company tested a scramjet engine for the AFRL in the late 1960s.

Six General Electric YJ93-3 turbojet engines, each in the 30,000-pound-thrust class, powered the XB-70. The futuristic XB-70A Valkyrie was originally conceived in the 1950s as a high-altitude ...