McDonnell / Douglas

A-20 Boston/Havoc

Douglas A-20 Boston/Havoc

McDonnell / Douglas


The Douglas A-20 Havoc (company designation DB-7) is an American medium bomber, attack aircraft, night intruder, night fighter.

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A-20 Boston/Havoc

The Douglas A-20 Havoc (company designation DB-7) is an American medium bomber, attack aircraft, night intruder, night fighter, and reconnaissance aircraft of World War II.

Designed to meet an Army Air Corps requirement for a bomber, it was ordered by France for their air force before the USAAC decided it would also meet their requirements. French DB-7s were the first to see combat; after the fall of France the bomber, under the service name Boston continued with the Royal Air Force. From 1941, night fighter and intruder versions were given the service name Havoc. In 1942 USAAF A-20s saw combat in North Africa.

Operational History


In October 1941 the Netherlands government in exile ordered 48 DB-7C planes for use in the Dutch East Indies. Delivery had been scheduled for May 1942 but because of the desperate situation US government agreed to divert 32 DB-7B Boston III aircraft to the Dutch East Indies in advance.

The first 6 were delivered by ship in February 1942.[citation needed] Only one aircraft was assembled in time to take part in the action. The Japanese captured the remaining aircraft of the delivery, and at least one was repaired and later tested by the Japanese Army.



RoleMedium bomber/Attack aircraft, Night Fighter
National originUnited States
ManufacturerDouglas Aircraft Company
DesignerEd Heinemann
First flight23 January 1939
Introduction10 January 1941
Retired(USAF) 1949
Primary usersUnited States Army Air Forces
Soviet Air Force
Royal Air Force
French Air Force
Number built7,478
Developed intoDouglas DC-5


Specifications (Douglas Havoc)

General characteristics

  • Crew: 3
  • Length: 47 ft 11 78 in (14.63 m)
  • Wingspan: 61 ft 3.5 in (18.68 m)
  • Height: 18 ft 1 12 in (5.52 m)
  • Wing area: 464 sq ft (43.1 m2)
  • Airfoil: root: NACA 23018; tip: NACA 23009
  • Empty weight: 16,031 lb (7,272 kg)
  • Gross weight: 24,127 lb (10,944 kg)
  • Fuel capacity: 400 US gal (330 imp gal; 1,500 l) normal capacity300 US gal (250 imp gal; 1,100 l) in an optional external tank 676 US gal (563 imp gal; 2,560 l) in four optional auxiliary tanks in the bomb-bay
  • Powerplant: 2 × Wright R-2600-23 Twin Cyclone 14-cylinder air-cooled radial piston engines, 1,600 hp (1,200 kW) each
  • Propellers: 3-bladed Hamilton-Standard Hydromatic, 11 ft 3 in (3.43 m) diameter constant-speed fully-feathering propellers

Douglas A-20 Boston/Havoc



  • Maximum speed: 317 mph (510 km/h, 275 kn) at 10,700 ft (3,300 m) 325 mph (282 kn; 523 km/h) at 14,500 ft (4,400 m)
  • Cruise speed: 280 mph (450 km/h, 240 kn) at 14,000 ft (4,300 m)
  • Stall speed: 98 mph (158 km/h, 85 kn)
  • Range: 945 mi (1,521 km, 821 nmi)
  • Ferry range: 2,300 mi (3,700 km, 2,000 nmi)
  • Service ceiling: 23,700 ft (7,200 m)
  • Rate of climb: 2,000 ft/min (10 m/s)
  • Time to altitude: 10,000 ft (3,000 m) in 8 minutes 48 seconds


Aircrafttoaal encyclopedia

The Douglas World Cruiser (DWC) was developed to meet a requirement from the United States Army Air Service for an aircraft suitable for an attempt at the first flight around the world. The Douglas Aircraft Company responded with a modified variant of their DT torpedo bomber, the DWC.