Ki-34 | |
---|---|
Nakajima AT-2, civil version of the Ki-34 | |
Role | Civil airliner/Light military transport aircraft |
Manufacturer | Nakajima Aircraft Company |
First flight | 12 September 1936 |
Introduction | 1937 |
Primary users | IJA Air Force IJN Air Service Dai Nippon Koku KK Manchukuo National Airways |
Number built | 351 |
The Nakajima Ki-34 was a Japanese light transport of World War II. It was a twin-engine, low-wing monoplane; the undercarriage was of tailwheel type with retractable main units. During the Pacific War, the Allies assigned the type the reporting name Thora.
The Ki-34 was originally designed as a civil transport. Nakajima Aircraft Company, which had the license-production rights to the Douglas DC-2, began design work in 1935 on a smaller twin engine airliner for routes which did not have the capacity to justify use of the larger DC-2. The initial design was designated AT-1, and after numerous design iterations, flew as a prototype designated AT-2 on 12 September 1936. [1] The design was all metal, except for the flight control surfaces, which were plywood. The wings used a multi-cell cantilever design. The prototype was fitted with 432 kW (580 hp) Nakajima Kotobuki 2-1 radial engines with fixed pitch wooden propellers, which were replaced in production models with Kotobuki-41 529 kW (710 hp) nine-cylinder radial engines, with variable pitch metal propellers.
A total of 32 AT-2s were produced for Imperial Japanese Airways (Dai Nippon Koku KK) and Manchukuo National Airways, [2] operating on scheduled routes between Tokyo and Xinjing, Tokyo and Tianjin, and within Manchukuo. These aircraft remained in operational service until the surrender of Japan in August 1945.
With a high demand for increased military transport capability after the start of the Second Sino-Japanese War in 1937, the Imperial Japanese Army adapted the AT-2 design for military use by fitting with more powerful Nakajima Ha-1b radial engines and re-designating the aircraft as the Army Type 97 Transport and Ki-34. The initial 19 aircraft were produced by Nakajima Aircraft, and another 299 aircraft were subsequently produced by the Army-affiliated Tachikawa Hikoki K.K. The final airframe was delivered in 1942.
In operational service, the Ki-34 was used as a utility aircraft for liaison and communications duties, and for paratrooper training and Special Forces operations.
At a later date, some aircraft were transferred to the Imperial Japanese Navy, where they were known as the Navy Type AT-2 Transport or Nakajima L1N1. Several were also transferred to the air force of the Japanese puppet state of China-Nanjing in 1942.
Data from Japanese Aircraft of the Pacific War, [2] Warbirds Resource Group [3]
General characteristics
Performance
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