Design and Development
The Tupolev I-14, designated as the ANT-31, was developed by the Tupolev design team at the Central Aero-Hydrodynamic Institute (TsAGI) under the leadership of Andrei Nikolayevich Tupolev. The aircraft represented a significant leap in aviation technology for the early 1930s, designed as a single-seat, single-engine, all-metal cantilever monoplane. It is noted for being the first fighter of its kind to combine an all-metal construction with an enclosed cockpit and retractable main undercarriage. The first prototype, the ANT-31-1, made its maiden flight on May 27, 1933. This was followed by an improved version, the I-14bis (ANT-31-2), which featured revised tail surfaces and wings to enhance aerodynamic performance and handling.
Production and Manufacturing
Series production of the I-14 was carried out at the Irkutsk Aviation Plant (also known as GAZ-125), which had been established in 1932. The plant's main workshops launched on August 24, 1934, and the first I-14 produced at the facility flew in February 1935. Although a production order for 55 aircraft was initially placed for the I-14bis standard, the program was severely curtailed. Deliveries began in November 1936, but production was halted after only 18 aircraft were completed. This limited run was primarily due to the established production and success of the competing Polikarpov I-16. Today, the Irkutsk Aviation Plant operates as a subsidiary of the Yakovlev Corporation.
Technical Specifications and Powerplant
The production I-14 was powered by a single Shvetsov M-25, a 9-cylinder air-cooled radial piston engine produced by the A. D. Shvetsov Design Bureau. The M-25 was a licensed Soviet version of the Wright R-1820 "Cyclone," delivering 521.8 kW (699.7 hp). This powerplant enabled a maximum speed of 449 km/h and a service ceiling of 9,430 m. The aircraft had a wingspan of 11.25 m and a length of 6.11 m, with a gross weight of 1,540 kg. While early design concepts for the I-14bis included heavy 45 mm Kurchevsky APK-11 recoilless cannons, the production standard was simplified to a more conventional armament consisting of one 20 mm ShVAK cannon and one 7.62 mm ShKAS machine gun.
Service History and Legacy
The I-14 was operated exclusively by the Soviet Air Force (VVS RKKA) in the role of a front-line fighter. Despite its advanced technical features, it saw no documented combat service in major conflicts, as it was phased out in favor of the more robust Polikarpov I-16. There are no documented surviving examples of the I-14 in museums or private collections. Its primary legacy lies in its role as the first aircraft produced by the Irkutsk Aviation Plant and its demonstration of the Soviet Union's ability to implement cutting-edge fighter design concepts in the early 1930s.