FORCE AND MOMENT CHARACTERISTICS OF SIX HIGH-SPEED RUDDERS FOR USE ON HIGH-PERFORMANCE CRAFT

Six rudders with a geometric aspect ratio of 1.5 and widely varying section shapes were constructed to determine the effect of section shape on the cavitating performance of high-speed rudders. Experiments were conducted in the 24-in. variable-pressure water tunnel at cavitation indices between 4.0 and 0.5 and an angle of attack range from -5 to +35 deg. Section shape had little effect on the lift curve slope or on the maximum lift coefficient. However, the blunt base sections had substantially higher drag coefficients throughout the normal operating range of rudder angles. Rudder stock torque was significantly affected by section shape and cavitation index.

• Corporate Authors:

  Naval Ship Research and Development Center

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

Media Info

• Features: References;
• Pagination: 34 p.

Subject/Index Terms

• TRT Terms: Airfoils; Hydrofoils; Performance; Rudders; Torque
• Uncontrolled Terms: Control surfaces
• Old TRIS Terms: Cavitating hydrofoils
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00051176
• Record Type: Publication
• Source Agency: Naval Ship Research and Development Center
• Report/Paper Numbers: Paper #4150
• Files: TRIS
• Created Date: Feb 28 1974 12:00AM