Northrop P-61 Black Widow
The Northrop P-61 Black Widow was the first American aircraft designed from the outset as a night fighter, built around an airborne radar that let its three-man crew find and attack enemy aircraft in darkness and bad weather. Developed from a January 1941 Army contract, the prototype flew on 26 May 1942. The big twin-boom fighter reached combat in mid-1944 and served in every theater of the war's final year, intercepting aircraft by night and ranging into enemy territory on intruder missions. Northrop built 706, and only four survive: three on museum display and one under restoration to fly.
Why It Mattered
The Black Widow was the first American aircraft designed from the start to find and destroy enemy aircraft at night and in bad weather. What made that possible was radar carried aboard the aircraft itself, a set developed for the Army at a laboratory run by the Massachusetts Institute of Technology. Air & Space Forces Magazine notes that in 1944 no other aircraft existed that had been purpose-built solely for fighting after dark. It served in combat for only the final year of the Second World War, yet its crews were credited with 127 enemy aircraft and 18 V-1 flying bombs destroyed. Its larger legacy is the way it worked: the magazine argues that a night interceptor flown by a pilot and a radar operator as an integrated team presaged how air combat would later be fought.
Design Notes
Northrop's answer to the Army's contract of 30 January 1941 was an unusually large fighter, comparable in size to the medium bombers of its era. The fuselage nacelle sat between twin tail booms, a layout chosen for stability as the aircraft closed in behind an intruder. The three-man crew sat in line within it: the pilot, a gunner behind him, and a radar observer at the rear, behind the turret. The aircraft was designed around its radar, the SCR-720, and its fixed armament was four 20 mm cannon in the belly, firing forward. Above the fuselage sat a powered, remote-controlled turret with four .50-calibre machine guns; only the pilot could fire the cannon, but any of the three crewmen could operate the machine guns. The turret was the same type as the B-29's forward turret, and because the bomber had production priority, several hundred Black Widows were delivered without one. Roll control came from spoilers on top of the wings, outboard of the engines, rather than conventional ailerons. Its glossy black finish was also a design choice: in searchlight tests it went undetected in 80 per cent of flights through the beams.
Operational History
Northrop test pilot Vance Breeze flew the prototype on 26 May 1942, but production was slow to start: the first aircraft came off the line in October 1943. The first night fighters reached the European Theater in March 1944, and combat operations began just after D-Day, in June 1944. The Black Widows soon moved beyond defensive patrols, flying deep into German airspace to bomb and strafe trains and road traffic. From July 1944 they also defended England against night-launched V-1 flying bombs. On the continent the squadrons turned to intruder work: the 425th Night Fighter Squadron strafed German road and rail traffic at night to cut the resupply Patton wanted shut down. The Pacific war started at nearly the same moment: on 30 June 1944 a Black Widow scored the type's first Pacific victory, a Mitsubishi Betty. Pacific squadrons harassed Japanese shipping convoys resupplying at Ormoc in the Philippines, escorted lost or crippled B-29s home, and in February 1945 the 427th Night Fighter Squadron added underwing rockets to its aircraft. The type's best-known episode came on the night of 14–15 August 1945, when the war was officially over but, as the Smithsonian notes, no one was sure every Japanese unit had heard the message. A Black Widow named Lady in the Dark forced an intruding Ki-43 fighter into the sea without firing a shot; the next night the same aircraft forced a Ki-44 into the ground, again without firing. When the war ended, the Army cancelled further production; a few aircraft, among them camera-carrying F-15As, later redesignated RF-61C, stayed in active service until 1950.
Afterlife
Northrop built 706 Black Widows, and only four are known to survive. Three are on permanent static display in museums — at Beijing, at Dayton, and at the Smithsonian's Udvar-Hazy Center — and the fourth is being restored to fly. The Smithsonian's P-61C was delivered in July 1945 and never saw combat; it flew cold-weather tests, then joined the National Thunderstorm Project, its turret removed for storm-monitoring equipment. From 1951 to 1954 the National Advisory Committee for Aeronautics borrowed the aircraft as a mothership, dropping recoverable swept-wing test bodies on some 50 flights; it came back to the Smithsonian that August with only 530 flying hours. The fourth survivor, a P-61B, spent just five days with its squadron in New Guinea before crash-landing on Mount Cyclops; it remained on the mountain until 1991. The Mid-Atlantic Air Museum's recovery and restoration project began in 1979, led by co-founder Eugene Strine until his passing in June 2018; his son Russell leads it now, and the museum is restoring the aircraft to airworthy condition.