Nakajima Ki.27 "Nate" Timeline
July 1936: Nakajima rolled out a prototype designated P E (Pursuit Experimental)
with an air cooled radial engine and fixed spatted undercarriage.
15 October 1936: 1st flight of the prototype Ki.27 (P E) at Ojima Airfield.
Wing Area: 16.4 sq. m. (176.527 sq. ft.), Wing Span: 10.4 m. (34' 1 7/16")
December 1936: 1st flight of the second prototype with a new wing.
Wing Area: 17.6 sq. m. (189.44 sq. ft.)
Speed: 291 mph./9,000 m.
Climb: 5,000 m./5' 10"
Engine: Nakajima Ha-1a: 710 hp./T.O., 650 hp./2,000 m.
Early 1937: The design was designated Ki.27 and began tests at the JAAF
Technical Air Research Institute at Tachikawa. It was pitted against:
Mitsubishi Ki.33: 301 mph./4,000 m., 5,000 m./5' 56"
Kawasaki Ki.28: 295 mph./3,000 m., 5,000 m./5' 35"
The Ki.27 was the slowest of the three but had superlative maneuverability.
Spring 1937: The Koku Hombu ordered ten pre-production Ki.27. At this time
it was decided to increase the wing span to 11.31 m. (37' 1 1/4"). Wing area
was increased to 18.56 sq. m. (199.777 sq. ft.).
Note: The Ki.27 was a balance between performance, potential reliability, simplicity,
ease of operation and maintenance.
Note: Armament of all Ki.27s was the license-built Vickers Class E machine gun
produced by Tokyo, Kokura & Nagoya Army Arsenals. 2 x Type 89 7.7 mm./
500 rpg./900 rpm./ 2,690 fps. velocity.
June-December 1937: Ten Pre-production Ki.27s were constructed and Nakajima
tooled up for series production at its Factory No.1 in Ota.
December 1937: The Koku Humbu approved the series production of the Ki.27
and production began as the Army Type 97 Fighter Model A (Ki.27).
Engine: Nakajima Ha-1b: 710 hp./T.O., 780 hp./2,900 m.
March 1938: The first Ki.27s were sent to Northern China.
3 April 1938: The first Ki.27kos to become operational were with the 1st Chutai of
the 2nd Hiko Daitai. The Ki.27 supplemented their Ki.10s
1 July 1938: The 59th Fighter Sentai becomes the first unit to be exclusively equipped
with the Ki.27 at Kagamigahara, Gifu Profecture.
July-August 1940: Progress of the Ki.43 was slow so Nakajima designed a lightweight
version designated Ki.27Kai. Two were constructed. Maximum speed reached 295
mph. Wing Loading had dropped to 80 kg./sq. m. (16.4 lb./sq. ft.).
Loaded Weight was 3.276 lb.
Edited by CORSNING, 17 July 2017 - 02:17 PM.