INFLATABLE HULL OF CATAMARAN-TYPE KNOCKED-DOWN VESSEL Russian patent published in 2001 - IPC

FIELD: boatbuilding; building of inflatable multi-hulled sports and pleasure sailing catamarans. SUBSTANCE: hull is provided with convex profiled flexible envelope with fore and aft edges, pair of inflatable chambers, longitudinal partition and two cavities. Partition is connected with flexible envelope over its upper and lower edges. Each cavity is formed by inner surface of flexible envelope and surface of partition adjoining it. Inflatable chambers are located opposite each other on either side of partition. Chamber are located in cavities to be engageable with envelope and partition. Partition is rigid; it is connected with aft and force edges of envelope over its side edges. Inflatable chambers are located over entire length of cavities. Cross section of hull has form of two bows interconnected by common chord. Chord is formed by height of partition in cross section. Bows are formed by cross section of flexible envelope in such way that relationship (s/H) < π is true, where S is perimeter of cross section of flexible envelope; H is height of partition in cross section; π is constant equal to 3.14159:. EFFECT: increased speed of vessel. 4 dwg