Abstract:
A waterbike (10) characterized by a front-end steering member (11) and a pair of horizontally displaceable stabilizing floatation members (13). The waterbike (10) has increased maneuverability at high speeds, and stability at low speeds or in a stationary position.
Abstract:
A boat having a pair of hull members (12) with separate fore and aft planing surfaces. Each one of the hulls has a forebottom surface (54), an aftbottom surface (55) and a midbottom surface (34). The forebottom surfaces and the aftbottom surfaces have positive trim angles (46, 48). Each midbottom surface is recessed into the respective hull member. When propelled at planing speeds, the boat skims across the water upon a planing area of the forebottom surface and a planing area of the aftbottom surface with the midbottom surface lifted out of the water.
Abstract:
A hydrofoil propulsion system (10) utilizing dual water propellers (16) in combination with dual shrouded air propellers (18). The air propellers (18) and the water propellers (16) are powered by diesel engines (22) mounted in pairs inside the hull (24) of the hydrofoil craft (14). Each water propeller (16) is affixed to an outdrive (35) through a pivotal propeller shaft (28) that permits the propeller shaft (28) and the water propeller (16) to move horizontally and vertically with respect to the hull (24). An air propeller (18) and a water propeller (16) are each coupled to a single pair of engines (22) so that as the craft (14) transistions from the hullborne mode to the foilborne mode, the thrust load is automatically transferred from the water propeller (16) to the air propeller (18).
Abstract:
A hull (4) for a trailable houseboat (2), the hull having sidewalls, bottom, bow and stern, the bottom having passages (30) which extend from the bow to the stern, the arrangement being such that when the hull is stationary and supporting a predetermined load, the passages are generally submerged and wherein when the hull is travelling above a predetermined speed, the hull is raised and water and air enter the passages to thereby improve the floatation of the hull.
Abstract:
The ''three-body'' nautical craft is designed in order to facilitate its dynamic sustentation and to regulate and localize such lift. The nautical craft is comprised of a central body (1) and two lateral bodies (2) which are offset forwards. The air flow due to the displacement is orientated by the channel (3), under the float, and directed between the edges of the side bodies (2), towards the outlets (12). These outlets participate, by adjustment or deformation, to the regulation of the sustentation and the trim of the float.
Abstract:
A hull (5) of a glide boat (1) consists of front and rear hull portions (5a, 5b). A bottom part (2a) of the front hull portion (5a) forms one front glide portion (21a), and a recess (7) is provided so as to extend along the center line of the rear hull portion (5b), two bottom parts (2b') either of which is positioned on the left or right side of this recess (7) forming two rear glide portions (21b). When the speed of the glide boat (1) is low, it runs with the front and rear glide portions (21a, 21b) completely submerged, and, when the speed of the glide boat (1) is high, it floats and glides on the water surface with the hull (5) supported on three portions, one front glide portion (21a) and two rear glide portions (21b).
Abstract:
A performance marine surface vessel (72) with a recess (73) in its underside that is pressurized with gas to form a supporting gas cushion that carries a substantial portion of vessel weight. The gas cushion is restrained by catamaran-like sidehulls, a movable seal (33) forward, and substantially rigid aft seal (61). In some instances a center hull (74) and/or a skeg-like device (59) are utilized to separate portions of the recess (73). The forward movable seal (33) is best made in several elements that are individually removable through an opening in the front deck. The seal elements (33) are formed at their top portion by a substantially rigid cap (64) that also attaches the seal (33) to the hull. The seal attachment (64) allows staggering of seals, fore and aft, which improves entry into waves.
Abstract:
A marine vessel includes a buoyant vessel body (12), a propulsive device, and at least one planing element (14). The planing element lifts the buoyant vessel body upward and out of contact with water throughout prolonged high-speed travel. The ratio of the planing element area to the volumetric equivalent of the weight supported by the planing element raised to the power of two-thirds is less than 1. The length of the planing element is at least 20 times its breadth. At least one of a plurality of attachment mechanisms (26) attached between the planing element and the buoyant vessel body is controllably adjustable in length so as to adjust an angle of attack of the planing element with respect to water. A deadrise angle adjustment mechanism (42) controllably adjusts a deadrise angle of the planing element with respect to water. The buoyant vessel body includes a ballast tank (28), and ballast piping connects the ballast tank with a ballast intake valve (30).
Abstract:
Planing-type vessel comprising a front portion and a rear portion in the direction of movement of the structure, the front portion comprising two symmetrical skim hulls (18, 20) and the rear portion having a rear contact area (34) comprising at least one skim hull. The invention is characterized in that the front and rear hulls are disposed on either side of the centre of gravity of the structure along the longitudinal axis thereof. The rear contact area is thereby subjected to a load greater than that of the front hulls. The invention is also characterized in that the angle of attack of the hull body in relation to the water surface is positive regardless of speed.
Abstract:
A water craft (1) comprises a hull (2) having an upper surface (6), an underside (5) and a stern. At the bow (13) of the water craft (1) there is a downwardly extending keel (3) having essentially planar wings (4) extending laterally therefrom. Keel (3) extends downwardly to the stern. Spaced from the underside (5) of craft (1) at the stern end thereof is a pair of foils (10) which span between outer edges (12) of underside (5) and keel (3). The contour of underside (5) provides a pair of tunnel like cavities under which foils (10) span. Extending from foils (10) are a number of fins (8). At the upper edge of bow (13) is a tail (9) which extends in a rearward direction from upper surface (6) of the water craft (1). The high speed water craft (1) is particularly suitable for high speed surface skimming.