"6"^^ . . . . . "The Polikarpov SPB (D) (Skorostnoy Pikiruyushchy Bombardirovshchik (Dalnost)\u2014High Speed Dive Bomber (Distance)) was a Soviet twin-engined dive bomber designed before World War II. A single prototype and five pre-production aircraft were built, but two crashed and the program was cancelled in favor of the Petlyakov Pe-2."@en .