Yury Vladimirovich Lomonosov (Russian: ???? ???????????? ?????????; 24 April 1876 – 19 November 1952) was a Russian railway engineer and a leading figure in the development of Russian Railways in the early 20th century.
He was best known for design and construction of the world's first operationally successful mainline diesel locomotive, the E el-2.
This was completed in 1924 and went into service in 1925.
In the late 1920s, Lomonosov immigrated to Europe and later became a British citizen.