FIELD: shipbuilding. SUBSTANCE: main propulsion plant includes engine plant 1 connected rotatably by means of practically vertical tubular shaft 8 mounted rotatably in ship. Hollow casing 1a embraces propulsion AC motor 2 connected with propeller shaft 3 which is connected in its turn with propeller 4 mounted on the outside of casing 1a which is supported internally by means of vertical plate bulkheads 5 which act as stiffeners in combination, as attachment units for securing propulsion motor 2, as members transmitting reaction forces to casing 1a at moment of rotation and as members of air tunnels for supply of gaseous cooling agent for motor 2 and discharge of waste agent. EFFECT: enhanced efficiency. 12 cl, 7 dwg
