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United States' flagUnited States' Army Air Corps aircraft marking

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.1 The A-17 was Northrop's first military aircraft.1


In December 1934 an order for 110 was placed after the prototype was done being tested.1,4


Production was delayed because two types of engines were replaced before settling on the production model.1

  • Northrop A-17:
  • Northrop A-17A: 931, 1004
  • A-33: 314
  • Total: 2424
  • Manufacturer: Northrop Corporation1,4 at El Segundo, California4


  • Northrop YA-13: Prototype.1 Developed privately in summer of 1933.1
  • Northrop A-17: The landing gear were fixed.4
  • Northrop A-17A: More powerful engine.1
  • Northrop 8A-1: Exported to Sweden and their designation was the B-5.3
  • 8A-5: Purchased by Peru but commandeered by the United States Army in 1942 and were used in a utility role.4


Deliveries of the A-17 began in August 1935.1

Withdrawn by the end of 1940 from primary units.4

French Purchase

Many of the A-17As were sold to France.4 These were in turn sold to Great Britain.4 These became trainers in the South African Air Force (SAAF).4


  Northrop A-17A attack
Type Attack1, Attack bomber3, Ground attack4
Crew 21,4
Engine (Type) 1: Pratt & Whitney Twin Wasp Junior3
1: Pratt & Whitney R-1535-13 Wasp1
1: Pratt & Whitney R-1535-13 Twin-Wasp Junior4
Cylinders Radial3, Radial 91, Radial 144
Cooling Air1,4
HP 8251,3,4
Propeller blades 3 variable pitch4
Span 47' 8"3, 47' 9"1,4
Length 31' 8"1,3,4
Height 9' 9"3, 12'1
Wing area 362 ft24
Empty 5,106 lb4
Loaded 7,500 lb3, 7,543 lb1, 7,550 lb4
Speed 220 mph3
Speed @ 2,500' 220 mph1,4
Service ceiling 19,400'1,4
Range 732 miles1,4, 800 miles3
Armament 5: MG1
Bombs 400 lb1, 500 lb3, 900 lb4
Wings 4: MG3
4: .30 MG4
Rear cockpit 1: MG3
1: .30 MG4


  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