The Design of a Fixed-Pitch Skewed Propeller for a Cable Laying Repair Ship (T-ARC)

摘要

The design process is presented for a fixed-pitch propeller for a Cable-Laying Repair Ship (T-ARC). The design specifications required that sufficient thrust be provided ollb3- ard and other low-speed conditions and that the endurance speed at 80-percent power be 15 knots. The effects on performance of various design parameters are also considered. The propeller is 13 feet (3.936m) in diameter and is designed to turn at 145 rpm at full power and 135 rpm at endurance speed. Calculations indicate that this propeller will perform satisfactorily at all required conditions. However, cavitation will be present at both endurance and full-power conditions and, if more than 6-percent margin in effective power is required, 15 knots will not be attainable at 80-percent power. Nearly twice the required thrust will be available at the low-speed conditions.