The F-17 designation almost came to service in the 1970s. Northrop Aircraft (now Northrop Grumman) developed the YF-17 Cobra and flew prototypes in 1976 with some help from NASA.

Northrop YF-17 Provenance Rex Hardy, Gift, 1995, NASM.1995.0050. Creator Northrop Corp See more items in Northrop YF-17 Photograph Albums Summary The Northrop YF-17, unveiled in April 1974, was a ...