ЖРД РД-170 (11Д521) и РД-171 (11Д520) Abstract. The RD-170/171 (Rocket Engine-170/171) are the world's most powerful liquid propellant rocket engines, designed and produced by NPO Energomash for use with Energia and Zenit launch vehicles. Engines use high performance staged combustion cycle with oxygen rich turbine drive gases.
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