Air cushion borne vehicles

Claim 1

A VEHICLE ADAPTED TO BE SUPPORTED AT LEAST PARTIALLY ON AN AIR CUSHION, THE VEHICLE COMPRISING A VEHICLE BODY HAVING A PERIPHERAL PART; A FLEXIBLE SKIRT ON THE UNDERSIDE OF THE VEHICLE BODY AND CONSTITUTING A SIDE OF A SPACE THAT RECEIVES AIR FROM FORMING THE AIR CUSHION, SAID SKIRT INCLUDING AN OUTER WALL OF FLEXIBLE MATERIAL EXTENDING DOWNWARDLY AND INWARDLY AND HAVING ITS UPPER EDGE EFFECTIVELY CARRIED BY THE PERIPHERAL PART OF THE BODY OF THE VEHICLE, SAID SKIRT ALSO COMPRISING AN INNER WALL EXTENDING DOWNWARDLY AND OUTWARDLY RELATIVE TO THE VEHICLE BODY AND SPACED FROM THE OUTER WALL, UPRIGHT FLEXIBLE WEBS LOCATED BETWEEN AND SPACED AT INTERVALS ALONG SAID WALLS, THE WEBS BEING ATTACHED TO THE INSIDE SURFACES OF THE WALLS ALONG LINES EXTENDING UPWARDLY AND DOWNWARDLY OF SAID SURFACES, SAID WEBS EXTENDING INWARDLY SUBSTANTIALLY PERPENDICULAR TO THE GENERAL DIRECTION OF THE ADJACENT PART OF SAID OUTER WALL ALONG SAID PERIPHERAL PART OF THE VEHICLE BODY AND BEING EFFECTIVELY CONNECTED TO THE UNDERSIDE OF THE VEHICLE BODY THEREBY TO LIMIT OUTWARD DISPLACEMENT OF SAID OUTER WALL; AND DUCTING FOR SUPPLYING AIR UNDER PRESSURE FOR THE SKIRT AND AIR CUSHION, SAID DUCTING BEING POSITIONED TO SUPPLY AIR TO THE UPPER PART OF THE INSIDE SURFACE OF THE OUTER WALL, THE SPACE BETWEEN SAID INNER AND OUTER WALLS COMMUNICATING WITH THE AIR CUSHION SPACE TO ENABLE AIR TO FLOW FROM THE FORMER SPACE TO THE LATTER SPACE, AND THE BOTTOM EDGES OF SAID WALLS FORMING AN AIR OUTLET THROUGH WHICH AIR SUPPLIED BY THE DUCTING FLOWS DOWNWARDLY TO FORM AN AIR CURTAIN BELOW THE SKIRT.