Ship propulsion system with two contra=rotating propellers

摘要

The propulsion system has at least one IC engine (14) driving the first propeller (2) and at least one electric motor (24) driving the second propeller (4). The electric motors are supplied by one or more generators (16,16'). One propeller, i.e. the first, is variable pitch and the other is fixed pitch.The first propeller is arranged behind the second propeller, looking in the direction of travel of the ship. The two propellers are mounted on two mutually coaxial shafts. The sum of the powers of the one or more IC engines and the one or more electric motors correspond to the maximum required propulsive power of the ship.