Rachuk was born in Perm. In 1944 the family moved to Voronezh. In 1954 Rachuk entered the Voronezh Civil Engineering Institute. After graduation he became a construction engineer in Krasnoyarsk. In 1962, after Gagarinís flight, and after being refused admission to aerospace engineering schools, he joined KbKHA and worked on development of the liquid rocket engines for Chelomei's UR-200 and UR-500 missiles. He then worked on Russia's only nuclear rocket engine, leading to uccessful ground tests at Semipalatinsk. From 1970 - 1980, Rachuk was chief designer for the RD-0120 oxygen-hydrogen rocket engine used on the Energia-Buran core stage. In 1993 Rachuk was named head of the KBKhA. Under his leadership, the bureau developed the 14D23 / RD-0124 oxygen-kerosene engines for the Soyuz-2 and Angara LVs, the 14D24 oxygen-kerosene engine for the Soyuz-2.1v light launch vehicle, the RD-0146D oxygen-hydrogen engine for the upper stage of the Angara launch vehicle, and a hypersonic jet engine, tested in flight at a speed of Mach 6.5. In 2011 he initiated work on electric propulsion engines. Author of more than 130 scientific works, and 20 patents, including the submerged engine used in the first stage of the RSM-54 SLBM.