page_title: North American BT-9
section_title: Variants
hierarchical_section_title: North American BT-9 / Variants
caption_attribution_description: English: North American BT-14 basic trainer in flight.
context_page_description: The North American BT-9 was the United States Army Air Corps designation for a low-wing single engine monoplane primary trainer aircraft that served before and during World War II.
  It was a contemporary of the Boeing-Stearman PT-13 Kaydet biplane trainer which pilots learned to fly on before advancing to Basic Flying Training on the BT-9. If they passed, they would continue on to the North American BC-1 and later the AT-6 and other aircraft types specific for each role. During the war, it was discovered that increasing the number of hours of Primary Flying Training eliminated the need for intermediate trainers like the BT-9 and so production never reached the levels for the PT and AT types.
  The NJ-1 was used by the United States Navy for a similar role, but was closer to the one off BT-10.
context_section_description: Source: Warbirds
  NA-16
  Prototype aircraft, one built.
  NA-18
  Pre-production aircraft, one built.
  North American BT-9
  Unarmed two-seat primary trainer for the USAAC, 42 built.
  North American BT-9A
  Armed with two 0.30 in (7.62 mm) machine guns, 40 built.
  North American BT-9B
  Improved unarmed version, 117 built.
  North American BT-9C
  Similar to the BT-9B, but with some equipment changes, 97 built.
  North American BT-9D
  One prototype only, which led to the development of the BT-14.
  North American Y1BT-10 & BT-10
  One prototype from BT-9C batch re-engined with a 600 hp R-1340-41.
  North American NJ-1
  Two-seat primary trainer aircraft for the USN, powered by a 600 hp (447 kW) Pratt & Whitney R-1340 radial piston engine, 40 delivered.
  North American YBT-14
  Redesignated BT-9D as prototype for BT-14.
  North American BT-14
  Advanced version with lengthened metal fuselage and T-6 outer wing panels, powered by a 450 hp (336 kW) Pratt & Whitney R-985-25 radial piston engine, USAAC, 251 delivered.
  North American BT-14A
  27 BT-14s were converted to take the 400 hp (298 kW) Pratt & Whitney R-985-11 radial piston engine.
caption: BT-14
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