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United States' Northrop A-17 attack


  • Northrop A-17A
  • Northrop A-17A


The Northrop A-17's design was based on the Gamma and Delta civilian planes. The A-17 was Northrop's first military aircraft.


In December 1934 an order for 110 was placed after the prototype was done being tested.


Production was delayed because two types of engines were replaced before settling on the production model.

  • Northrop A-17:
  • Northrop A-17A: 93, 100
  • A-33: 31
  • Total: 242
  • Manufacturer: Northrop Corporation at El Segundo, California


  • Northrop YA-13: Prototype. Developed privately in summer of 1933.
  • Northrop A-17: The landing gear were fixed.
  • Northrop A-17A: More powerful engine.
  • Northrop 8A-1: Exported to Sweden and their designation was the B-5.
  • 8A-5: Purchased by Peru but commandeered by the United States Army in 1942 and were used in a utility role.


Deliveries of the A-17 began in August 1935.

Withdrawn by the end of 1940 from primary units.

French Purchase

Many of the A-17As were sold to France. These were in turn sold to Great Britain. These became trainers in the South African Air Force (SAAF).


  Northrop A-17A attack
Type Attack, Attack bomber, Ground attack
Crew 2
Engine (Type) 1: Pratt & Whitney Twin Wasp Junior
1: Pratt & Whitney R-1535-13 Wasp
1: Pratt & Whitney R-1535-13 Twin-Wasp Junior
Cylinders Radial, Radial 9, Radial 14
Cooling Air
HP 825
Propeller blades 3 variable pitch
Span 47' 8", 47' 9"
Length 31' 8"
Height 9' 9", 12'
Wing area 362 sq ft
Empty 5,106 lb
Loaded 7,500 lb, 7,543 lb, 7,550 lb
Speed 220 mph
Speed @ 2,500' 220 mph
Service Ceiling 19,400'
Range 732 miles, 800 miles
Armament 5: MG
Bombs 400 lb, 500 lb, 900 lb
Wings 4: MG
4: .30 MG
Rear cockpit 1: MG
1: .30 MG


  1. Aircraft of WWII, Stewart Wilson, 1998
  2. World War II Airplanes Volume 2, Enzo Angelucci, Paolo Matricardi, 1976
  3. Aeronautics Aircraft Spotters' Handbook, Ensign L. C. Guthman, 1943
  4. American Attack Aircraft Since 1926, E. R. Johnson, 2012
20th Century American Military History Crucial Site