EVALUATION OF THE TRIM OF A PLANING BOAT AT INCEPTION OF PORPOISING

Planing boats porpoise in smooth water when the angle of attack, or trim of the planing surface exceeds a critical value that depends on the speed, on the configuration of the hull and on the location of the center of gravity. The purpose of the present paper is to provide designers with a straight-forward method for the evaluation of the critical trim corresponding to a given set of conditons. Numerical applications show that the trims so computed agree with experimental results within acceptable limits.

• Supplemental Notes:
  • Presented at the Spring Meeting, Lake Buena Vista, Florida, April 2-4, 1973.
• Corporate Authors:

  Society of Naval Architects and Marine Engineers

  601 Pavonia Avenue
  Jersey City, NJ  United States  07306-2907
• Authors:
  • Angeli, J C
• Publication Date: 1973

Media Info

• Features: References;
• Pagination: 6 p.

Subject/Index Terms

• TRT Terms: Hulls; Hydroplanes; Ship dynamic stability; Trim (Aeronautics)
• Old TRIS Terms: Hull configurations; Stepped hulls; Trim
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00044475
• Record Type: Publication
• Source Agency: Society of Naval Architects and Marine Engineers
• Report/Paper Numbers: Paper D
• Files: TRIS
• Created Date: May 23 1973 12:00AM