The RD-8 engine was developed by Yuzhnoye Design Bureau for the second stage of the Zenit rocket. It has four hinged chambers and a single turbopump unit. The fuel pair is LOX/kerosene. Vacuum thrust is 78.5 kN and its specific impulse in vacuum is 342 seconds (3.35 km/s).
The engine was designed for long service life (up to 4000 seconds), high reliability, and is the first smaller upper stage engine to use the staged combustion cycle.
O light shine down on me You know what I need Shine down on me Shine down on the garden Shine down on the garden
Sweet earth alive under me You know what I need Cradle me like a seed As I lay in the garden As I lay in the garden
O wise and beautiful tree Standing high over me Oh the things you have seen Tell me your story in the garden Tell it to me in the garden
And tell me How long have we slept How long have we wept There's work to be done
Sky above So vast and so deep You know what I need Rain down on me Rain down on the garden Rain down on the garden
O light surrounding me Sweet mystery In everything I see Come and find me in the garden Come and find me in the garden