Topic - Energiya

, "Energy") (GRAU 11K25) was a Soviet rocket that was designed by NPO Energia to serve as a heavy-lift partially recoverable launch system for a variety of payloads including the Buran spacecraft. Control system main developer enterprise was the Khartron NPO "Electropribor". The Energia used four strap-on boosters each powered by a four-chamber RD-170 engine burning kerosene/LOX, and a central core stage with 4 one-chamber RD-0120 (11D122) engines fueled by liquid hydrogen/LOX. - Source: Wikipedia