The purpose of the main reduction gears is to __________.

The purpose of the main reduction gears is to reduce high turbine RPM to an efficient propeller RPM. In marine propulsion systems, turbines operate at much higher speeds compared to the optimal speeds required for propellers to efficiently convert that rotational energy into thrust. The main reduction gears serve to bridge this gap by lowering the turbine's rapid revolutions per minute (RPM) to a more manageable level that is suitable for driving the propeller effectively. This reduction allows the vessel to maintain efficient operation and propulsion performance while ensuring that the engine operates within its designed parameters.

By facilitating this reduction, the gears play a critical role in enhancing the overall efficiency of the propulsion system, allowing for better fuel economy and extended operational life for the machinery involved.