FIELD: engines.
SUBSTANCE: invention relates to jet propulsion systems, more specifically jet propulsion device (1), in which first feed (6) circuit for feeding main thruster (4) with a first propellant includes outlet (13), downstream from a pump (8b) of first turbopump (8) and passing through first regenerative heat exchanger (10) and turbine (8a) of first turbopump (8), and in which second feed circuit (7) for feeding main thruster (4) with a second propellant includes, downstream from pump (9b) of second turbopump (9) and passing through second regenerative heat exchanger (11) and a turbine (9a) of second turbopump (9). System (1) additionally includes least one secondary thruster (15) connected downstream from turbines (8a, 9a) of first and second turbopumps (8, 9).
EFFECT: invention provides higher power output.
10 cl, 1 dwg
