Northrop P-61 Black Widow airplane model. The heavily armed Black Widow was the United States' first aircraft specifically designed as a night-fighter. In the nose, it carried radar equipment which enabled its crew of two or three to locate enemy aircraft in total darkness and fly into proper position to attack.
The XP-61 was flight-tested in 1942 and delivery of production aircraft began in late 1943. The P-61 flew its first operational intercept mission as a night fighter in Europe on July 3, 1944, and later was also used as a night intruder over enemy territory. In the Pacific, a Black Widow claimed its first "kill" on the night of July 6, 1944. As P-61s became available, they replaced interim Douglas P-70s in all USAAF night fighter squadrons. During WW II, Northrop built approximately 700 P-61s, 41 of these were -Cs manufactured in the summer of 1945 offering greater speed and capable of operating at higher altitude. Northrop fabricated 36 more Black Widows in 1946 as F-15A unarmed photo-reconnaissance aircraft.