The Martin T4M was an American torpedo bomber from the 1920s. It was an improvement on the earlier Martin T3M, a single-engine biplane. The T4M served as the standard torpedo bomber aboard US Navy aircraft carriers through much of the 1930s. The TG-2 was the last development and featured a 620hp (463 kW) Wright R-1820-86 Cyclone engine. In total just 32 were produced in that variant.