Rudder Force and Moment Measurements on a 1/4-Scale SES 100 Rudder
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD SHIP PERFORMANCE DEPT
Pagination or Media Count:
Force and moment measurements were obtained in the NSRDC 36-in. variable-pressure water tunnel on a high-speed rudder with a geometric aspect ratio of 1.47. Data presented adhere to Froude scaling with an attempt to scale appropriate cavitation number. The cavitation index was varied from 3.4 to 0.16 for angles of attack of 0 to 29 deg. Lift, drag, and rudder stock torque were all significantly affected by variations in the cavitation number. Additional data are presented for Froude scaling only without considering the effect of cavitation number. The report also indicates a decrease in forces and moments with ventilation of the rudder at the trailing edge versus no ventilation.
- Marine Engineering