Originally designed as a day fighter, the prototype first flew in
1951. Problems with the planned powerplant (the Westinghouse J40)
and program change to a all-weather night fighter delayed the Demon's
delivery until 1956.
The Demon was withdrawn in 1964 to be replaced by more capable fighters
that became available during the long development of the Demon.
The F3H was redesignated the F-3 in 1962.
