The RD-120 is a liquid-fueled rocket engine developed in Russia. It is designed to power the Zenit launch vehicle and is known for its efficiency and reliability. The engine uses a combination of kerosene and liquid oxygen as propellants, allowing it to produce a significant amount of thrust. This engine features a staged combustion cycle, which enhances its performance by maximizing the energy extracted from the propellants. The RD-120 has been used in various space missions, contributing to the successful deployment of satellites and other payloads into orbit.