Grigorovich TB-5
 Grigorovich TB-5 (Russian: Григорович ТБ-5) was an experimental heavy bomber designed and tested in the Soviet Union in the early 1930s. Designed as a competitor for TB-3 TB-5 was intended to be powered by two FED 24-cylinder X engines of 746 kW (1000 hp) each. When these were canceled the underwing pods were revised to each house a pair of Bristol Jupiter engines in a push-pull configuration.