FIELD: designing and operation of jet engine plants of space vehicles. SUBSTANCE: propellant feed system includes autonomous subsystems and propellant topping-up system which have fuel and oxidizer tanks. Hydraulic cavities of propellant tanks in propellant topping-up system are connected with one of autonomous subsystems through coupling units by means of hydraulic mains of propellant transfer system connected to mains feeding propellant from tanks to manifolds through start and cutoff valves. System is provided with additional propellant transfer mains fitted with start and cutoff valves connecting the propellant feed mains of other subsystem with hydraulic propellant transfer mains. On one side, additional propellant transfer mains are connected to propellant feed main before start and cutoff valves fitted at manifold inlets and on other side they are connected to hydraulic propellant transfer mains between coupling units of hydraulic mains and start and cutoff valves separating these units from hydraulic cavities of propellant tanks of propellant topping-up system. EFFECT: possibility of redistribution of propellant among propellant tanks; enhanced efficiency of engine plant of cargo vehicle; extended functional capabilities. 2 cl, 1 dwg
