An axial-flow turbojet developing up to 11,200 pounds of thrust.
A turbofan version of the J57 developing up to 21,000 pounds of thrust.
An axial-flow, dual compressor turbojet developing 13,500 pounds of thrust, up to 19,600 pounds with afterburner.
An axial-flow, dual compressor turbojet developing 17,500 pounds of thrust, up to 26,500 pounds with afterburner.
An axial-flow turbofan developing up to 25,100 pounds of thrust with afterburner.
