Abstract: A paddle wheel yacht includes a ship body and a ship power device that is arranged on the ship body and consists of a propeller driven by a main engine. The propeller consists of two paddle wheels. The lower edges of the paddle wheels are lower than the bottom surface of the ship body and are symmetrically arranged on the two sides of the ship body. Paddles are uniformly distributed on the outer edges of the paddle wheels in the radial direction and continuously flap the water surface down-backward at high speed when the paddle wheels rotate at high speed. Only the tail part of the ship body contacts with the water surface and the ship body slides on the water surface, so as to avoid large water resistance and obviously improve the propulsion efficiency to realize the high speed and economical navigation of the ship.

Abstract: Water craft achieving better hydrodynamic performance, greater stability and increased versatility. The improvement over the water craft in the U.S. Pat. No. 6,595,815 is achieved by the use of a new configuration of the active hulls and the stationary hull, the modification of the active hulls and the stationary hulls and the addition of a pair of the modified active hulls.

Abstract: A recreational water craft of uncomplicated design and construction is provided herein which is adaptive to be manually powered by one or more crew members or readily converted from manual power to sail (or supplement by sail) without loss of stability or increase in complexity of operation. This water craft possesses the attributes of a tri-hull and/or catamaran vessel, wherein the crew is supported and operates such vessel from a centrally located platform or main float which is connected to, and flanked on either side by, an outrigger float or pontoon. Each outrigger float is further provided with a vertical extension or riser to which is mounted an independently operated and manually powered paddle wheel. The paddle wheels, upon mounting to the riser, are positioned in the open wells located to the port and starboard sides of the platform and inboard of each of the outrigger floats.

Abstract: A water bicycle and a detachable device for converting a sail board into a water bicycle. The water bicycle has a flotation member and a frame removably mounted to the flotation member. Pedals are rotatably mounted to the frame. Paddle wheels are provided on either side of the frame and are interconnected with the pedals so as to be rotatably driven by the pedals. A steering handle is rotatably mounted to the frame and is interconnected with the paddle wheels to selectively steer the water bicycle by raising and lowering the paddle wheels.

Abstract: A watercraft has two pontoons interconnected by framework which supports a propelling unit adjacent its bow end. The unit includes a paddle wheel between the two pontoons with exposed pedals to be engaged by the feet of a seated occupant. A rudder is attached to the stern end of the framework to an intermediate portion of which a seating unit is attached adjacent which the rudder control is located. An outboard motor may be attached to the rear end of the framework and the seating unit, constructed to enable the watercraft to accommodate two persons seated back-to-back, is adjustable lengthwise of the framework.

Abstract: A radially vaned rotor is mounted for rotation about a horizontal axis extending athwartships of a boat. A housing encircles the major portion of the rotor and has an axial inlet and a downwardly directed peripheral outlet. The tips of the rotor vanes project through the housing peripheral outlet below the surface of the water surrounding the boat. When the boat is traveling at low speed, the rotor functions as the impeller of a centrifugal pump drawing water into the housing through the axial inlet and discharging the water through the peripheral outlet to propel the boat. The outlet can be shifted circumferentially fore and aft to alter the direction of water discharged therethrough. At high speed, planing of the boat elevates the housing so that only air is drawn through its axial inlet and discharged through its peripheral outlet, the majority of boat-propelling force being produced by the paddle wheel action of the rotor vane tips.

Abstract: A rudderless motorboat propelled and steered by twin-turbine wheels also functioning as traction wheels to carry the boat over sandbars and other submerged bodies to prevent it from running aground. The stern section of the boat hull is provided with a pair of longitudinally-extending tunnels which are symmetrically disposed with respect to the keel. Each wheel is rotatably mounted within a respective tunnel on an axis of rotation which is above the bottom line of the hull whereby only the lower segment of the wheel projects below this line to effect propulsion. Disposed within each tunnel on either side of the wheel therein are inlet and outlet baffles which are contoured to admit water to the propelling segment of the wheel and to discharge water therefrom, the baffles otherwise conforming to the periphery of the wheel to prevent recirculation of the water.