FIELD: reversal of thrust of double-flow turbojet engines. SUBSTANCE: device is provided with swivel doors which may be integrated into outer wall of circular duct in closed position when device is functioning in forward thrust mode; circular passage forms gas flow loop behind fan of turbojet engine. Doors may also turn under action of special control unit to form obstruction for deflecting gas flow when thrust reversal unit is functioning in thrust reversal mode. Each door is provided with at least one gas flow deflecting blade whose aerodynamic profile has form of wing; it is positioned in contact with gas flow circulating through circular passage. Gas flow acts on this blade trying to keep door in closing position corresponding to operation of proposed unit in forward thrust mode. EFFECT: enhanced reliability and safety; improved characteristics during operation in forward thrust mode and thrust reversal mode. 17 cl, 30 dwg
