Grigorovich DG-56
The Grigorowitsch DG-56 ( Russian Григорович ДГ-56 , also Grigorowitsch LK-3 , ЛК-3) was the project of a Soviet three-seater long-range fighter equipped with two 825 hp Hispano-Suiza 12 Ybrs engines. The maximum speed calculated was 438 km / h. The armament should consist of eight SchWAK machine cannons. Construction of the single-seat prototype began in 1935, but the project was discontinued in 1936 before the machine was completed.