Padgett-Swann Machinery is one of the oldest nozzle manufacturers in the United States. Nozzles increase forward and astern pull; protect the propeller from striking objects; and increase flow conditions into the propeller thus reducing fluctuation in pressure on the blades results in a beneficial effect on cavitations, fatigue stress, vibration and noise. The nozzle offers a means of increasing the efficiency of heavily loaded propellers and the nozzle itself produces a positive thrust. Efficiency is increased by 30 percent, giving more dragging, towrope and bollard pull, while not reducing the speed or consuming more fuel than with a conventional openface propeller. While not sacrificing thrust, the fuel savings on new construction are upward of 20 percent.