STATUS: Retired, Out-of-Service
MANUFACTURER(S): Douglas Aircraft Company - USA
OPERATORS: United States (retired)
LENGTH: 47.57 feet (14.5 meters)
WIDTH: 61.35 feet (18.7 meters)
HEIGHT: 18.04 feet (5.5 meters)
WEIGHT (EMPTY): 15,730 pounds (7,135 kilograms)
WEIGHT (MTOW): 19,753 pounds (8,960 kilograms)
ENGINE: 2 x Pratt & Whitney R-2600-11 air-cooled radial piston engines developing 1,600 horsepower each and driving three-bladed propeller units.
SPEED (MAX): 339 miles-per-hour (545 kilometers-per-hour; 294 knots)
CEILING: 28,215 feet (8,600 meters; 5.34 miles)
Detailing the development and operational history of the Douglas P-70 Nighthawk Night-Fighter Aircraft Conversion.
Entry last updated on 6/21/2018.
Authored by Staff Writer. Content ©www.MilitaryFactory.com.
To shore up its need for a dedicated night fighter in 1940, the United States Army Air Corps (USAAC) went ahead with modified Douglas A-20 "Havoc" / "Boston" light bombers to suit the role. Development began in 1942 in anticipation that the series would not have to fight for long as the Northrop P-61 "Black Widow" - purposely designed for night fighting - would soon arrive in 1943. As such, 163 conversions were made and these across a few notable marks - some never to see combat exposure at all. An XP-70 served as the series prototype to prove the validity of the conversion and the aircraft then operated under the formal designation of P-70 "Nighthawk". All P-70s were delivered before September of 1942.
It was the British Royal Air Force (RAF) that first realized the A-20 as a night fighter when they converted their A-20 Havocs for the role by installing appropriate air intercept radar and a ventral gun pod. The naturally-glazed nose section was painted over/hard-covered to shroud the radar suite and an additional internal fuel tank was fitted for extended operational ranges. The USAAC followed suit, arming their A-20s and outfitting them with local copies of the British AI Mk IV radar (as the SCR-540). These aircraft too lost their glazed nose sections. Some fitted a ventral cannon tray with 4 x 20mm cannons while others utilized a "gun nose" mounting 6 or 8 x 0.50 M2 Browning heavy machine guns - continuing the American reliance on all-machine-gun armament for their aircraft. 2 x 0.50 machine guns were fitted under the nose to fire tracer rounds, useful in gun-laying. In these forms, the radar suite was moved to the bomb bay. The armor protection encountered in the original A-20 was reduced to help lighten the operation loads of the P-70s. It was deemed that such an aircraft, in its given role, need not burden itself down with unnecessary protection.
The Douglas A-20 airframe proved a solid choice for the mission ahead. Its dual-engine configuration, particularly over expansive oceans, meant that the aircraft could fly on a single engine if forced. The multiple crew spread the workload around helping to reduce pilot fatigue. Cannon armament - or similar forward-firing firepower - was a prerequisite considering that the crew would have, at best, a single drive against an enemy target and best make the first shots count.
P-70 marked original base Nighthawks numbering 59 examples. The P-70A-1 mark emerged from the A-20C production model and totaled 39 examples while the 65 P-70A-2s came from the A-20G. The P-70B-1 was the A-20G-10-DO night fighter conversion (single example) and P-70B-2s were A-20G and A-20J models reserved for training future P-61 crews - these aircraft outfitted with SCR-720 and SCR-729 radar kits.
In practice, the P-70 proved a serviceable machine but was only ever fielded in the Pacific Theater. There was already a converted A-20 with radar on station over California after the Japanese attack at Pearl to prove the aircraft-radar combination sound. First deliveries of P-70s was in April of 1942 with machine gun noses while retaining support for 2,000lb of internal stores if needed. The A-1s then followed in 1943 during a period when night fighters were in constant need against marauding Japanese raiders. While P-70s lacked much in the way of flat-out speed and high-altitude work (they lacked superchargers), they provided a solution where there initial proved none to be found. its usefulness was limited with the arrival of the dedicated P-61 in 1944 and other converted types which promised better results and performance. By the start of 1945, all P-70s were removed from frontline service, thus ending their operational tenures in World War 2, and served as trainers until their final days. Indeed, the P-70 trainers graduated some 485 persons to serve in American night fighter squadrons.
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General Assessment (BETA)
Values are derrived from a variety of categories related to the design, overall function, and historical influence of this aircraft in aviation history.
MF Power Rating (BETA)
The MF Power Rating takes into account over sixty individual factors related to this aircraft entry. The rating is out of 100 total possible points.
Relative Maximum Speed Rating
This entry's maximum listed speed (339mph).
Graph average of 300 miles-per-hour.
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units