General Electric J31

The I-16 was a development of GE's I-A which, in turn was a copy of Whittle's W.1. Designed to deliver 1,600 lbs thrust, the I-16 was first run in 1943. By the end of the war, a jet engine designation system had been developed by the U.S. Military and the I-16 became the J31.
Around 250 were produced.


  • I-16: 1,650 lb (7.3 kN) thrust
  • J31-GE-5: 2,000 lb (8.9 kN) thrust


  • Centrifugal turbojet
  • Single-stage centrifugal compressor
  • Single axial turbine

used by

  • Bell P-59 Airacomet