B - Operations – Transporting – 60 – V
Patent
B - Operations, Transporting
60
V
305/5
B60V 1/00 (2006.01) B60V 1/16 (2006.01)
Patent
CA 1138497
ABSTRACT A waterborne air cushion vehicle is disclosed which has a flat rigid upper rectangular sheet-like platform. A plurality of flat rigid longitudinal walls are attached substantially at right angles to the plat- form and depend therefrom substantially parallel with the major axis of the platform. The outermost two of the walls are disposed as sidewalls along the respective edges of the platform. A plurality of longitudinally spaced laterally aligned arrays of flexible trough-shaped skirts are respectively looped with a space therein and fastened via each longitudinal edge thereof with respect to the underside of the platform flush with but independently movable with respect to adjacent pairs of the walls but extendable to a lesser depth than that of the walls. Pressurised air is admissible via apertures of fixed size at a relatively higher pressure to the skirts and also admissible at a relatively lower pressure via variable-sized openings remotely controlled and located respectively beneath the platform in com- munication with at least four square or rectangular open-bottomed air cushion chambers disposed laterally in pairs and each bounded by an adjacent pair of the skirts and by an adjacent pair of the walls. The depth of the walls and of the skirts is so related to the flow rate of the air that the vehicle is buoyant upon water with the walls protruding into the water sufficiently to prevent air spillage via the walls when the vehicle is urged longitudinal- ly through the water by propulsion means. The skirt air inlet openings are adapted to re-admit by reverse flow at least part of the compressed air in any one of the skirts independently in response to fugitive deflection of the skirts resulting from turbulence of the water, to thereby inhibit move- ment of the vehicle about the pitch axis thereof. Each skirt is a bag-like structure adapted to resist changes in its cross-sectional shape under load by virtue of captive air therein.
334355
Fetherstonhaugh & Co.
Mattox Darryl F.
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