Abstract: A planing hull having a conical contour extending from the bow portion to a stern portion having a flat surface on each side of the keel, a wide lip chine having a lip portion, and a transom separating the bow portion and the stern portion creating a step between the bow portion and the stern portion. A flat keel portion extends from the stern to the mid hull transom.

Abstract: A single-body transom type of hull includes reaction flaps extending along side platings of the hull in a direction from bow to stern over at least 10% or more of the length of the ship. Inner surfaces of the flaps, along with outer surfaces of the side platings, form structures having inversely U-shaped cross sections defining recesses of parabolic cross sections so that water may flow smoothly along the hull. The reaction flaps thus suppress the outward flow of spray from the hull and impart lateral stability to the hull even at high speeds.

Abstract: This invention relates to a marine vessel hull form, in particular to a high speed planing boat. It describes a new and distinctive shape of hull which, unlike other hull forms developed to date, features the shape which modifies the flow of water underneath and around it in such a manner that the waves behind the hull at speed are reduced to a minimum. This hydrodynamic effect results in reduced resistance and thus increased speed and/or reduced fuel consumption. Further, it will result in reduced wash behind the boat, an effect that will enable it to operate at full speed near shores where local regulations limit crafts' speed because of shore erosion caused by waves generated by boats and ships. The hull form described in this invention offers more stability than the planing traditional hulls do, due primarily to higher beam to length ratio and to the stern shape, which departs from the traditional "V", which is not particularly stable at speed or stationary.

Abstract: An amphibious aircraft, capable of high speed maneuverability on the surface of the water, utilizes a aerodynamic platform to generate lift and to define a tunnel with a pair of central sponsons extending inwardly of the wings of the aircraft longitudinally of the platform which supports the cockpit and propulsion system.

Abstract: A Vee bottom structure for a boat includes a stern, a bow and sides which are symmetrical relative to a keel line. The bottom structure comprises a part extending from the stern towards the bow. This part includes central bottoms which are positioned at an angle to each other beside the keel line on either side thereof, and of side bottoms extending outward from outer margins of the central bottoms and positioned at an angle against the central bottom on the respective side.

Abstract: A submersible boat is provided which utilizes a planing boat hull with a sharp bow and blunt stern. The submersible boat performs as a planing boat until it nears the target location. Then, the boat submerges in order to avoid detection. After this vessel submerges, it travels with the blunt end forward and the sharp end aft.

Abstract: A vessel (10) has a semi-displacement or semi-planing round bilge hull (11) characterized by low length-to-beam ratio (between about 5.0 to 7.0) and utilizing hydrodynamic lift. The bottom (15) of the hull (11) rises toward the stern (17) and flattens out at the transom (30). Four waterjet propulsion units (26, 27, 28, 29) are mounted at the transom (30) with inlets (31) arranged on the hull bottom (15) just forward of the transom (30) in a high pressure area. Water under high pressure is directed to the pumps (32) from the inlets (31). Eight marine gas turbines arranged in pairs (36/37, 38/39, 40/41, 42/43) power the waterjet propulsion units (26, 27, 28, 29) through combined gearboxes (44, 45, 46, 47) and cardan shafts (48, 49, 50, 51).

Abstract: This invention is an improved boat hull design for stable operation as a planing-type hull in a wide range of water conditions. The hull is comprised of a substantially V-shaped central hull portion and a pair of adjacent side floats, one on each side of the central hull. The inner walls of the side floats are substantially vertical, and the floats are stepped upwardly at approximately midships, such that the rear portion of the side floats is substantially horizontal, or parallel to the plane of the water surface. At least one pair of flat surfaces are formed along the bottom portion of the hull positioned at the intersection of lowermost strakes and steps formed on each side of the hull, so as to provide substantially improved stability and attitude when running at high speed on rough water. A dihedral tunnel is formed by the concavely-curved surfaces of the central hull in combination with the inner walls of the side floats.

Abstract: A hull extension is attached at an appropriate distance above the hull bottom surface to the stern of a planing water craft so as to be at least partially submerged at subplaning speeds and totally unsubmerged at planing speeds, effectively increasing hull length at subplaning speeds while not affecting hull length at planing speeds. A "step" effect is thus featured whereby the hull extension is not in contact with the water once planing commences. Hydrodynamic and buoyant efficiency is increased by the hull extension at subplaning speeds and unaffected thereby at planing speeds. The hull extension also offers practical utility in terms of providing additional protection, deck space and mounting area.

Abstract: An improved hull is disclosed for use on an inboard boat of a relatively increased length, the hull having a generally deep V-shaped bottom surface at the bow slowly transitioning to a relatively flat stern to provide increased lift as compared to conventional inboard boats, to provide a smooth ride yet permit maximized speed and stability for water skiing use, to provide the desirable handling characteristics (such as for turning and maneuverability) found in an inboard boat of relatively shorter length, and to produce a minimal wake for water skiing purposes. The hull is formed with a series of longitudinally-aligned pairs of strakes which, over the majority of their respective lengths, have a negative strake angle. Through the specific placement, the longitudinal commencement and termination, of the respective pairs of strakes, they provide increased lift, improved turning ability, and reduced wake side spray.

Abstract: A boat hull is provided with a unique V-shaped bottom surface to increase lift, to reduce drag, and to maximize speed. The deadrise angle of the V-shaped bottom increases progressively from the stern to a point forward of the stern at a rate of 2.degree. to 6.degree. for each four feet of keel length, i.e., at the rate of about 1/2.degree. to 11/2.degree. per foot of keel length. The bottom surface between the stern and the forward point has a generally convex transverse cross section. The keel is substantially straight from the stern to the forward point and then curves upwardly to the bow.

Abstract: A boat hull is designed with air passageway slots positioned at the stern of the craft. If the bow begins to rise thereby presenting the danger of the craft flipping, the air pressure, at a given point, is allowed to escape through the air passageways. Once the air begins to escape through the air passageways, the forces tending to flip the craft diminish and the bow of the boat lowers to the water.

Abstract: A pleasure boat having a rectangular passenger area for operation at high speeds in moderate seas, planes on ski-like planing surfaces on the bottom of laterally spaced, knife edge hulls located on the starboard and port sides of the craft and the stern end of a wedge shaped bottom rounded to assist in turns; the rounded bottom also having flutes to improve tracking and strakes to assist in the lift and to divert spray from the craft; the two forward hulls terminating in tunnels located along either side of the rounded bottom to reduce greatly the surface area in the water and to provide lift to assist in planing.

Abstract: A mechanism with one foot pedal for controlling the fore-and-aft attitude of a high-speed boat having the usual cavitation or trim plate. When the foot pedal is depressed the cavitation plate is lowered through an interconnecting assembly of pivoted members to lower the bow of the boat against any upending tendency as it accelerates from a dead stop in the water. As the boat speed increases, release of pressure on the foot pedal causes movement of the cavitation plate to an upper position, wherein it is ineffective to lower the bow, and locking of the plate in that position until the foot pedal is again depressed.

Abstract: A hull for a sail boat, wherein devices for the continuous hydrodynamic conversion of a displacement-type hull into a planing-type hull, even during sailing are provided on the stern in front of the hull end.

Abstract: A hard shell shaped to intimately cover the bottom of an inflatable raft. The shell is made of various contoured staves or segments joined together. Straps are used to attach the shell to the raft, bow and transom. A combination transom and mounting frame is used in the raft which do not include a built-in transom. The shell not only protects the raft against abrasion and puncture, but also reduces its drag coefficient, contributes to it stability and enhances its directional control.

Abstract: A mid-planing hull for a fast, sea-going vessel in which the centers of buoyancy, gravity, and hydrodynamic lift at planing speeds substantially coincide amidships. In a preferred embodiment, the hull includes a full forefoot of conically developed forward sections, a straight and level keel in a vee-bottom of constant deadrise, with planing surfaces distinctly decreasing in area in the afterbody to trailing edges at the stern.

Abstract: A hull with a convexly down-stepped plane located in the aft section and a "V" shaped hull structure in the forward section. The "V" shaped section and the planar section are connected by a smooth, convexly shaped transition section that is convex in reference to the exterior of the hull and extends below the "V" section. The transition section can be provided with spray root deflectors. The planing surface extends substantially the full width of the lower portion of the hull and can have portions of its after portion upwardly displaced.

Abstract: The body of the ship, particularly sailing yachts and boats, on which is exerted, as a result of the displacement-originated forces, a lifting force such that the body starts to plane, has, at least in one longitudinal region located underneath the horizontal plane (12) defined by the water surface, a vertical longitudinal profile (14) of which the lower portion has a shape corresponding to that of the lower portion of the profile of an aerofoil. The longitudinal profile extends towards the stern (10) substantially tangentially to the horizontal plane (12). The chord (S) of at least this aerofoil lies within the horizontal plane. The lower portion of the body may have the shape indicated in lateral longitudinal regions and may have in a central region profile chords having a positive or negative incidence angle. Conversely, the shape indicated may be realized in the central region, the profile chords having a positive or negative incidence angle being located in the lateral regions.

Abstract: A planing boat is provided having a variable configuration hull including two side panels hingedly secured to opposite sides of a keel panel. When the boat is sitting still in the water or moving at relatively slow speeds, the side panels extend generally outwardly from the keel panel providing the boat with a degree of stability. As the speed of the boat increases, and upon attaining dynamic stability, the side panels pivot upwardly thereby reducing the effect of impact on the water. When the speed of the boat decreases, the side panels return to their normal outwardly extending position.

Abstract: A small watercraft is provided with a heavy engine and its auxiliary machinery at the fore section of a hull and is designed to be steered by the rider on the rear section of the hull. An outer configuration of the bow portion of the small watercraft, which is to sink below the water surface when the small watercraft floats on the water without the rider, is designed to be asymmetrical to the center line of the hull.

Abstract: Hydrocraft, capable of maintaining comfortable seaworthy performance at both low and high speeds, in both calm and rough seas, wherein its hull form coordinates high efficiency of at least two zero deadrise planing surfaces with a wave piercing, wedge effect bow segment. The forward portion of the respective concave sides of the bow intersect at the centerline of the hull. The sides of the forward body of the hull rise from the bottom at the chine, vertically then upwardly and outwardly in a concave curvature, the form of which will load the side skin in tension. At a preselected point above the hull bottom, the sharp edged bow is truncated in a conical, forward sloping surface to provide an upward hydrodynamic force to lift the hull over waves which are higher than the gunwale. The parallel after body is located above the after planing surface, and a conical transom closes the stern.

Abstract: A deep vee entry hull is disclosed and includes a central running surface flanked in the after portion thereof, by inboard, intermediate and outboard running surfaces. The central and inboard surfaces terminate at the aft ends thereof in a first transverse step while the intermediate running surfaces terminate in a second transverse step aft of the first.

Abstract: A tunnel-type boat-hull construction is operative with substantially reduced frictional resistance in the water and also with improved high-speed stability. An air-withdrawal port is provided in the bow portion of the tunnel, and exit ports which are interconnected to the withdrawal port are provided along generally downwardly facing submerged surfaces of the hull. When the boat hull is operated in a forward direction, air is captured in the forward portion of the tunnel, and a portion of the air is withdrawn through the withdrawal port and is exited through the exit ports. The air which is exited through the exit ports provides lubrication for the submerged hull surfaces so that the hull is operative with substantially improved efficiency; and because the air is withdrawn from the bow portion of the tunnel, the bow uplift effects which are characteristic of conventional tunnel-hull-type vessels when they have been operated under high-speed conditions are substantially reduced.

Abstract: A boat having a hull which has straight lines in the hull plan normal to the central axis of the keel, the straight lines all making the same acute angles with the keel center line. Preferably the straight lines extend beyond the water line to the chine. The freeboard portion above the chine is inclined inwardly from the chine toward the keel center line. The boat remains substantially level as it increases speed under engine, or wind, thrust. An inward slant of the above water freeboard portion tends to deflect wind and sunlight without undue sidewise tilt of the hull.

Abstract: A drag reducing device for barges including a flexible mat carrying a plurality of transversely spaced, elongated flexible tubular air passages open at the top and bottom, suspended from one end of a barge, extending transversely of the barge and adapted to swing longitudinally of the barge as the barge moves longitudinally through a body of water, whereby air from the atmosphere is conducted through the tubular air passages to an area beneath the barge.The drag reducing device is particularly adapted for suspension between the adjacent ends of a pair of barges connected in tandem so that the flexible mat and tubular members swing in a trailing longitudinal direction to direct air beneath the bottom surface of the trailing barge.

Abstract: A motorized pleasure boat having an essentially V-shaped hull. Pairs of strakes are placed on each side of the hull bottom to reduce side slipping and to increase planing efficiency. Stern extensions project rearwardly from the transom to further improve planing efficiency. The stern extensions have inner surfaces which additionally reduce side slipping. The length-to-width ratio of the hull is substantially less than that of traditional hulls.

Abstract: A stabilizer for boats, the stabilizer being of generally delta planform, having a positive upper camber and a negative lower camber in chordwise cross section, being mountable upon a propeller post and in adjacent spaced relation from the propeller and adapted to be submerged, the stabilizer providing a lifting force to the stern, a downward force to the bow and a generally stabilizing affect upon the boat to which it is adapted.

Abstract: An hydrofoil assembly for small craft is disclosed. The assembly includes two hydrofoils independently mounted on a boat or a propulsion unit of the boat's motor for free pivotal movement between a depending position and a extended in-use position. The foils automatically adopt the in-use position during forward movement and drop to their depending positions whenever their angle of attack becomes negative, such as in reverse movement when pivoted up to clear an obstacle, or when the boat is stationary.

Abstract: A highly efficient sailboard shape has a full displacement form for efficient light and upwind sailing and has an efficient planing form for high wind sailing with the conversion from displacement to planing forms caused by the buoyance reaction to aftward weight shift.

Abstract: A fan-powered water vessel in which an essentially flat-bottomed main hull portion is provided with a central friction reducing, relatively shallow tunnel whereby air forced into the forward portions thereof serves to form an air film between the major parts of the bottom of the boat and the supporting water surface. In addition, a pair of relatively narrow secondary tunnels are provided on either side of the central tunnel and are of a depth substantially greater than that of the central tunnel so as to confine the friction reducing air film between said secondary tunnels. This construction enables the boat to be utilized both on relatively calm inland waters and swamps as well as in choppy waters. An elevated bow provided at the forward section of the main hull divides and spreads waves to further enhance efficiency. The rear of the hull includes a power supply support housing including an air fan.

Abstract: Porpoising control in a high speed planing hull is effected during straight, on plane running and in turning maneuvers by a novel configuration of aft tapered wedges bridging the aft, exit ends of the outboard and next adjacent, inboard running surfaces.

Abstract: A ski boat for producing a relatively small, well-defined wake and a relatively smooth working table includes a V-shaped keel section. The angle of the "V" increases towards the stern of the hull. A chine panel is mounted at each of the outboard edges of the keel section. A secondary chine is located on each side of the keel section, being parallel to the centerline of the V-shaped keel section and following the contour of the keel section. A concave depression panel is located at the stern of the boat, extending forwardly therefrom into the keel section.

Abstract: A convertible sailboat/motorboat is disclosed which has capability for displacement movement under maximum speeds typical of the maximum for displacement boats as a function of their size, capability for semi-planing of the hull under sail propulsion, and capability for planing of the hull under motorboat propulsion. The key features are an extremely light hull weight, an engine located approximately amidships, and a deep retractable keel with an upper trim tab which upon retraction into the hull creates a large shift of center-of-gravity rearward for the boat. The keel is hinged at a point above and to the rear of the keel which imparts a large rear movement of the keel weight for motorboat operation upon its retraction. Performance under displacement sailing is uniquely enhanced with the combination of a low-weight, deep keel and the keel trim tab in the upper portion of the keel where slip reaction is generated with the addition of a minimum of extra heeling moment to that generated by the sails.

Abstract: An elongated ski boat is provided for producing a relatively small, well-defined wake and a relatively smooth working table. The boat comprises an elongated hull which includes a bow, a stern, a port side, a starboard side and a transom. The hull comprises a starboard keel panel and a port keel panel, each of which extends from a location above the water line near the bow to the stern of the hull. The keel panels join one another at a center keel line to form a V-shaped keel section having a starboard edge and a port edge. The V-shaped keel section defines an obtuse angle at the bow which progressively increases to an angle of slightly less than 180.degree. at the stern. A starboard chine panel and a port chine panel are each joined to the respective edge of the keel section, extending forwardly from the stern to a location above the water line near the bow.

Abstract: 4. A towable sea-going vehicle for carrying communications equipment for in conjunctive cooperation with communications equipment of another vessel comprising:an essentially hollow body having openings in its walls for free flooding and self-bailing of said body;said body having an essentially rounded, gently pointed nose section and a V-bottom portion, said V-bottom portion providing a surface for the planing of said body on the surface of water and providing a face portion for contributing to the hydrodynamic lifting of said body when in an underwater position;buoyancy producing means located in said body to the extent that the weight of said body in air is substantially less than the excess buoyancy of said body when immersed in water;and said body having an upper cambered portion for producing lift when said body is in an underwater position;whereby said communications-carrying vehicle may be towed either submerged or on the water surface at speeds up to and in excess of 35 knots.

Abstract: A surface vehicle has two wings, which are hinged to a wing core along axes extending along the wing center axis, to change the angle of attack, so that the trailing wing edges as extending towards the rear in converging configuration remain in a common plane and close the plenum chamber with reference to the (hypothetical) mirror image of the wing construction.

Abstract: A hull is provided including an aft transom and upstanding freeboard sides extending forwardly from the stern and terminating in a forward bow. The hull includes bottom structure having a central keel extending horizontally forward from the transom and curving upwardly at its forward end portion to form the aforementioned forward bow. The bottom structure includes opposite side deadrise surfaces extending outwardly from the keel and the deadrise surfaces decrease in width to a forward apex defined by the forward extremities of the deadrise surfaces. The forward end portions of the deadrise surfaces curve upwardly into the lower portion of the bow and the angle of the deadrise surfaces relative to transverse horizontal lines does not increase from the transom toward the aforementioned apex. Opposite side outer bottom surfaces extend between the remote marginal portions of the deadrise surfaces and the lower marginal portions of the freeboard sides.

Abstract: A vee bottom boat having one or two inboard engines with the drive shafts thereof extending through the hull to position a propeller in a position such that when the boat is planing at cruising speed the propeller will be surface-running or operating in half-submerged condition. A rudder is located directly in rear of the propeller. A partly cylindrical splash guard is provided over the propeller and prevents "rooster-tailing." In addition, a water supply duct having a radius approximating that of the propeller is provided extending forwardly a short distance from the propeller. A transmission connecting the engine to a propeller shaft includes a chain which permits advantageous location of the propeller shaft relative to the engine and its output shaft.

Abstract: A high speed planing boat hull including a transom stern, freeboard side portions and a wide-keeled lower hull portion which comprises keel sidewalls forming steep relatively constant deadrise angles, and keel bottom surfaces which are flat at the transom and progress forwardly to form shallow deadrise angles. First steps having shallow deadrise angles are located adjacent the keel sidewalls, second steps having similar deadrise angles are located adjacent the side portions, and risers having steep deadrise angles interconnect the first and second steps.

Abstract: An aqua-planing vehicle has freely rotatable buoyant wheels at both sides of the front and rear ends of a rectangular base frame so that the watercraft can float on a lake or ocean surface. The watercraft propelling member such as a screw is driven by a power source such as an engine mounted on the frame so that the aqua-planing vehicle can plane on the water surface at high speed. Wing members are arranged aslant above the frame such that they receive air on their undersides during travel of the watercraft so that the craft is endowed with buoyancy by virtue of air resistance, to thereby reduce water resistance and allow smooth and high-speed planing of the watercraft on the water surface. Provided aslant below the frame are high-glide impellers arranged such that they can be pushed down by an operating pedal.