NPO Energomash
The RD-170 (РД-170, Реактивный Двигатель-170, Reactive Engine-170) is the world's most powerful liquid-fuel rocket engine and - regardless of the fuel type - second after Space Shuttle's SRB. It was designed and produced in the Soviet Union by NPO Energomash for use with the Energia launch vehicle. The engine burns the Russian equivalent of RP-1 fuel and LOX oxidizer in four combustion chambers, all supplied by one single-shaft, single-turbine turbopump rated at in a staged combustion cycle.