The
TF33 (JT3D) is a turbofan version of the J57
turbojet. The first two compressor stages of the canceled
J91/JT9
replaced the first three compressor stages of the J57, making it
simple to modify existing turbojets with a kit. The
conversion increased thrust by 35 percent and fuel consumption by
15-22 percent.
The TF33 first flew in 1958 and was in production
until 1985. About 8,600 were produced.
