Page 186 - Theory and Design of Air Cushion Craft

Factors affecting ACV transverse stability 169

Fig. 4.33 Typical static transverse stability curve for ACV.

change of cushion pressure of the craft in heeling and the effectiveness of the air cush-
ion blown from the nozzle of stability skirts on the stability of craft.
Therefore these problems have to be solved by experiments. References 45 and 46
offered some commentary on experimental results from model tests as discussed
below.

Effect of supporting surface

Figure 4.34 shows that the static transverse stability for an ACV model with + type of
cushion compartment hovering on a water surface is worse than that on rigid surface
due to the deformation of the water surface. In general the static transverse stability
on the water surface is about 70-80% of that on rigid surface whatever type of
cushion compartment was adopted.

3 en

Fig. 4.34 Static transverse stability of ACV models with + type of air cushion compartmentation.