Martin T4M

The Martin T4M was an American single-engined biplane torpedo bomber of the 1920s, developed by the Glenn L. Martin Company from the earlier Martin T3M, and it served as the standard torpedo bomber aboard United States Navy aircraft carriers through much of the 1930s. The Model 74 followed tests of radial-engined T3M developments, and its prototype, the XT4M-1, first flew in April 1927 with new single-bay metal wings and a Pratt and Whitney Hornet engine. The Navy ordered 102 production T4M-1 aircraft on 30 June 1927. Martin sold its Cleveland factory to the Great Lakes Aircraft Company in October 1928, so Great Lakes received an order for 18 TG-1 aircraft and later built the TG-2 version with Wright Cyclone engines.