Nakajima Type 91 fighter

The Nakajima Type 91 fighter was a Japanese single-seat, single-engine parasol-monoplane fighter of the 1930s with a fixed tailskid undercarriage. It was designed to an Imperial Japanese Army requirement of 1927 and developed from the NC series of prototypes, with a smaller wing, relocated fuel tank and bracing struts, a Townend ring cowling and a new tail and undercarriage. It first flew in 1931 and the Army ordered it as the Nakajima Army Type 91 fighter, though directional stability and centre of gravity problems delayed service entry. Between 1931 and 1934 some 420 were built, 100 of them by Ishikawajima, and the Kawasaki Army Type 95 fighter replaced it in 1936 and 1937.