Klimov M-105
The Klimov M-105 was a V12 liquid-cooled piston aircraft engine used by Soviet aircraft during World War II. Most versions produced about 1,100 horsepower (820 kW), making them competitive with other early-war designs like the Rolls-Royce Merlin and Daimler-Benz DB 601. Almost 130,000 were produced, and best known as the engines of the Petlyakov Pe-2 and Pe-3, and the long line of Yakovlev fighters.