PERFORMANCE ESTIMATES OF CAPTURED AIR BUBBLE VEHICLES WITH WATER JET PROPULSION
Research and development rept.
CALIFORNIA UNIV BERKELEY DEPT OF MOLECULAR BIOLOGY
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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 lb was eliminated at higher lb 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 lb, 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.
- Surface Effect Vehicles and Amphibious Vehicles