Mitsubishi Ki-51

Mitsubishi Ki-51. The Mitsubishi Ki-51 was a light bomber used by the Imperial Japanese Army Air Service during World War II, with its design influenced by the Dornier Do 17 and Heinkel He 118. It was designed to replace the Mitsubishi Ki-30 and saw action in various theaters, including China, Burma, and the Philippines. The Ki-51 was also used by the Royal Thai Air Force and the Indonesian Air Force, with some aircraft being captured by the United States Army Air Forces and used for evaluation purposes, such as at the Wright Field.

● Design and Development

The Mitsubishi Ki-51 was designed by a team led by Joji Hattori, who had previously worked on the Mitsubishi G3M and Mitsubishi G4M bombers. The design was influenced by the Dornier Do 17 and Heinkel He 118, with a focus on aerodynamics and maneuverability. The Ki-51 was powered by a Mitsubishi Ha-26 engine, which provided a top speed of over 300 mph. The aircraft was also equipped with a retractable landing gear and a variable-pitch propeller, designed by Hamilton Standard. The Ki-51 underwent testing at the Tachikawa Airfield and was later produced at the Mitsubishi Nagoya factory, with some components being manufactured by Nakajima Aircraft Company and Kawasaki Heavy Industries.

● Operational History

The Mitsubishi Ki-51 saw action in various theaters during World War II, including China, Burma, and the Philippines. It was used by the Imperial Japanese Army Air Service to attack Allied forces, such as the United States Army Air Forces and the Royal Air Force. The Ki-51 was also used to support Japanese Army ground operations, such as during the Battle of Singapore and the Battle of Burma. Some Ki-51s were captured by the Soviet Air Forces and used for evaluation purposes, with some being flown by Soviet test pilots, including Mark Gallai. The Ki-51 was also used by the Royal Thai Air Force to attack French Indochina during the Franco-Thai War.

● Variants

There were several variants of the Mitsubishi Ki-51, including the Ki-51a, Ki-51b, and Ki-51c. The Ki-51a was the initial production model, while the Ki-51b had an improved Mitsubishi Ha-102 engine. The Ki-51c was a modified version with a wooden fuselage and was used for training purposes, with some being used by the Imperial Japanese Navy Air Service. Other variants included the Ki-51d and Ki-51e, which had different armament and avionics configurations, designed by Nippon Electric and Toshiba.

● Specifications

The Mitsubishi Ki-51 had a length of 29 ft 8 in and a wingspan of 37 ft 9 in. It was powered by a Mitsubishi Ha-26 engine, which provided a top speed of over 300 mph. The aircraft had a range of over 1,000 mi and was equipped with a retractable landing gear and a variable-pitch propeller. The Ki-51 was armed with machine guns and could carry a bomb load of up to 1,100 lb, designed by Japanese Army ordnance experts, including General Tomoyuki Yamashita. The aircraft had a crew of two, including a pilot and a navigator, who used navigation equipment designed by Seiko and Citizen Watch.

● Operators

The Mitsubishi Ki-51 was operated by several countries, including Japan, Thailand, and Indonesia. The Imperial Japanese Army Air Service was the primary operator, with the aircraft being used in various theaters during World War II. The Royal Thai Air Force also operated the Ki-51, using it to attack French Indochina during the Franco-Thai War. The Indonesian Air Force operated a small number of Ki-51s, which were used for training purposes, with some being flown by Indonesian pilots, including Sukarno. Other operators included the United States Army Air Forces, which captured several Ki-51s and used them for evaluation purposes, with some being flown by American test pilots, including Chuck Yeager. Category:Aircraft of Japan