Page 189 - Theory and Design of Air Cushion Craft
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172 Stability
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Fig. 4.37 Influence of gap between the lower tip of transverse stability skirt and ground on static transverse
stability of model craft.
0.4 0.8
Fig. 4.38 Influence of vertical position of centre of gravity on static transverse stability.
analysis of transverse stability during the design of skirt height. If one uses higher
skirts due to the requirements of obstacle-clearing capability and seaworthiness, then
effective measures for stability have to be adopted during the design stage.
Effect of fan flow rate on transverse stability
Figure 4.39 shows that transverse stability of an ACV is directly proportional to the
flow rate of fans, the relation of which is opposite to that for SES. Probably the
rationale of this phenomenon is that the slope of total head with respect to the flow
rate on a characteristic curve increases as the flow rate of the fan increases, which
leads to enhanced transverse stability.
