Mayak is a new family of Ukrainian launch vehicles under development by the Yuzhnoye Design Office, which would be manufactured by Yuzhmash. The family is built in a modular fashion on the basis of a single line of main engines with thrust of roughly 120 or 200 tonnes-force (1,200 or 2,000 kN) for the first stage (RD-801 or RD-810) and 10 tonnes-force (98 kN) for the upper stage (RD-809K derived from RD-8). Engines, control systems and ground equipment are largely derived from components of existing rocket families Zenit and Tsyklon.