RUDDER FORCE AND MOMENT MEASUREMENTS ON A 1/4-SCALE SES 100 RUDDER

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 force and moments with ventilation of the rudder at the trailing edge versus no ventilation.

• Corporate Authors:

  Naval Ship Research and Development Center

  Ship Performance Department
  Bethesda, MD  United States  20034
• Authors:
  • Layne, D E
• Publication Date: 1973-11

Media Info

• Features: References;
• Pagination: 37 p.

Subject/Index Terms

• TRT Terms: Cavitation (Mechanics); Force; Froude number; Rudders; Surface effect ships; Torque
• Old TRIS Terms: Effects; Rudder forces
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00051882
• Record Type: Publication
• Source Agency: Naval Ship Research and Development Center
• Report/Paper Numbers: NSRDC #4118 R&D Rpt
• Files: TRIS
• Created Date: Mar 25 1974 12:00AM