A-33/Model 8A-5
Douglas A-33.jpg
Northrop A-17/Douglas A-33
Role Attack aircraft
National origin United States
Manufacturer Douglas Aircraft Company
Introduction 1941
Primary user United States Army Air Corps
Number built 36
Developed from Northrop A-17

The Douglas A-33 (Model 8A-5) was an American attack aircraft built in small numbers during World War II. It was an updated version of the Northrop A-17, with a more powerful engine and an increased bomb load. While the A-33 was intended initially for the export market, the entire production run was taken up by the United States Army Air Corps.

Design and development

In 1932, the Northrop Corporation had been formed as a partly owned subsidiary of Douglas and by 1937, the Northrop Model 8 became known as the Douglas 8A produced in the El Segundo Division of Douglas aircraft.

The 8A-5 was powered by a 1,200 hp (895 kW) Wright R-1820-87 engine and was the most powerful and best armed of the series, with four wing mounted 0.30 in machine guns, two 0.50 in machine guns in pods below the wing, a rear-firing flexibly mounted 0.30 in gun, and the ability carry up to 2,000 lb of bombs.

Operational history

Early in 1940, the Norwegian government ordered 36 8A-5s which not had been delivered before Norway was invaded by the Germans. Completed between October 1940 and January 1941, the aircraft were delivered to a training center in Canada that had been set up for the Norwegian government-in-exile, named "Little Norway" at Toronto Island Airport, Ontario.

After the loss of two aircraft and a reassessment of the training needs now met by the use of other aircraft, the remaining 34 Model 8A-5Ps were sold to Peru. However, 31 were repossessed by the Army Air Corps at the start of World War II. These aircraft, designated A-33, were used for training, target tug, and utility duties.[1]


Model 8A-5
Serial numbers: 42-13584/13601; 42-109007/109019


 United States

Specifications (A-33)

Data from McDonnell Douglas Aircraft since 1920[2]

General characteristics



See also

Related development

Aircraft of comparable role, configuration, and era


  1. ^ Pelletier Air Enthusiast September/October 1998, pp. 3–4.
  2. ^ Francillon 1979, p. 222.
  3. ^ Lednicer, David. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 16 April 2019.
  • Francillon, René J. McDonnell Douglas Aircraft since 1920. London: Putnam, 1979. ISBN 0-370-00050-1.
  • Pelletier, Alain J. "Northrop's Connection: The unsung A-17 attack aircraft and its legacy, Part 1". Air Enthusiast No 75, May–June 1998, pp. 62–67. Stamford, Lincolnshire: Key Publishing. ISSN 0143-5450.
  • Pelletier, Alain J. "Northrop's Connection: The unsung A-17 attack aircraft and its legacy, Part 2". Air Enthusiast No 77, September–October 1998, pp. 2–15. Stamford, Lincolnshire: Key Publishing. ISSN 0143-5450.
  • Wagner, Ray. American Combat Planes of the 20th Century, Third Enlarged Edition. New York: Doubleday, 1982. ISBN 978-0-930083-17-5.
  • Andrade, John M. . U.S Military Aircraft Designations and Serials since 1909. Leicester: Midland Counties Publications, 1979. ISBN 0-904597-22-9.
  • Swanborough, F. G. and Peter M. Bowers. United States Military aircraft since 1909. London: Putnam, 1963, 1971, 1989. ISBN 0-85177-816-X.

Further reading