Mitsubishi 1MF

Mitsubishi 1MF
Role Carrier Fighter
Manufacturer Mitsubishi Internal Combustion
Designer Herbert Smith
First flight 1921
Introduction 1923
Retired 1930
Primary user Imperial Japanese Navy
Number built 138

The Mitsubishi 1MF was a Japanese carrier fighter aircraft of the 1920s. Designed for Mitsubishi Aircraft by the British aircraft designer Herbert Smith, the 1MF, also known as the Navy Type 10 Carrier Fighter was operated by the Imperial Japanese Navy from 1923 to 1930.


Development and design

The Japanese shipbuilding company Mitsubishi Shipbuilding and Engineering Co Ltd set up a subsidiary company, the Mitsubishi Internal Combustion Engine Manufacturing Co Ltd (Mitsubishi Nainenki Seizo KK) in 1920 to produce aircraft and automobiles at Nagoya. It quickly gained a contract from the Imperial Japanese Navy to produce three types of aircraft for operation from aircraft carriers: a fighter, a torpedo bomber and a reconnaissance aircraft. To produce these aircraft, it hired Herbert Smith, formerly of the Sopwith Aviation Company to assist the design of these aircraft, Smith bringing to Japan a team of seven other British engineers [1].

The fighter designed by Smith and his team, designated the 1MF by Mitsubishi, and known as the Type 10 Carrier Fighter by the Japanese Navy (referring to the year of design of 1921, the 10th year of the Taishō period), first flew in October 1921 [1].

The 1MF was a single-seat, single-bay biplane with unequal-span wings and all-wooden construction, powered by a 224 kW (300 hp) Hispano-Suiza engine (license produced as the Mitsubishi Hi engine). It was fitted with claw-type arrestor gear for use with British-style fore and aft arrestor cables [2].

After successful flight testing, the aircraft was accepted by the Japanese Navy as a standard fighter, with 138 of various versions being built, production continuing until 1928. [3].

Operational history

The 1MF entered service with the Imperial Japanese Navy in 1923, replacing the Gloster Sparrowhawk [4]. A 1MF aircraft became the first aircraft to take-off from and land on Japan's new aircraft carrier Hōshō on 28 February 1923 [2]. The 1MF series proved a tough and reliable aircraft[3], operating from the carriers Akagi and Kaga - as well as from Hōshō - when they entered service in 1927 and 1928 respectively [2]. It continued in service until 1930, being replaced by the Nakajima A1N.


Initial prototype. Fitted with car-type radiator on front of nose. Navy designation Type 10-1.
Experimental version with increased wing area. Navy designation Type 10-1.
Experimental prototype with two bay wing. Navy designation Type 10-1.
Production version with Lamblin radiators under nose replacing original car-type radiators. Navy designation Type 10-2.
Revised production version with cockpit moved forwards. Navy designation Type 10-2.
Minor changes. Navy designation Type 10-2.
Carrier trainer version with jettisonable wheeled undercarriage and floats under wings to allow safe ditching. Navy designation Type 10-2.



Specifications (1MF3)

Data from Japanese Aircraft 1910-1941 [1]

General characteristics

  • Crew: One
  • Length: 6.90 m (22 ft 7½ in)
  • Wingspan: 8.50 m (27 ft 10½ in)
  • Height: 3.10 m (10 ft 2 in)
  • Empty weight: 940 kg (2,073 lb)
  • Loaded weight: 1,280 kg (2,821 lb)
  • Powerplant: 1 × Mitsubishi Hi V-8 water-cooled, 224 kW (300 hp)



See also

Related development
Aircraft of comparable role, configuration and era


  1. ^ a b c Mikesh, Robert C; Abe, Shorzoe (1990). Japanese Aircraft 1910-1941. London: Putnam Aeronautical Books. ISBN 0 85177 840 2. 
  2. ^ a b c Johan Myhrman. "Mitsubishi Type 10 Carrier Fighter - Brief history of the Type 10". Retrieved 2007-08-09. 
  3. ^ a b Donald, David (Editor) (1997). The Encyclopedia of World Aircraft. Aerospace Publishing. ISBN 1-85605-375-X. 
  4. ^ Johan Myhrman. "The Sparrowhawk Ship Born Fighter - Brief history of the Sparrowhawk". Retrieved 2007-08-09. 

External links

IJN Hosho and her aircraft
Virtual Aircraft Museum

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