PERFORMANCE ESTIMATES OF CAPTURED AIR BUBBLE VEHICLES WITH WATER JET PROPULSION

Performance predictions of captured air bubble ( CAB ) vehicles utilizing water jet propulsion are presented. The analysis was made for various combinations of gross weight, specific loading, length-to-beam ratio, and wave height. In addition, the effect of varying the ducting loss coefficient was also investigated. It was found that the total drag hump of low length-to-beam ratios ( L/B ) was eliminated at higher L/B values. This effect is due to the complex behavior of the wavemaking drag component. It was further found that for a particular length-to-beam ratio ( L/B ), a value of specific cushion loading existed which optimized the performance ( as measured by the ratio of weight to horsepower required ). The lighter specific cushion loadings offered definite performance advantages at the lower length-to-beam ratios. ( Author )

• Corporate Authors:

  University of California, Berkeley

  Berkeley, CA  United States  94720
• Authors:
  • Williams, Robert M
• Publication Date: 1967-2

Media Info

• Pagination: 125 p.

Subject/Index Terms

• TRT Terms: Hump yards; Waterjet propelled craft
• Old TRIS Terms: Drag hump; Waterjet propulsion
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00001963
• Record Type: Publication
• Source Agency: Defense Documentation Center
• Report/Paper Numbers: AERO-1119 R & D Rpt.
• Files: TRIS
• Created Date: Oct 30 1972 12:00AM