An electric underwater jet motor designed for vehicles traveling above or below the sea. The electric underwater jet motor includes a plurality of stators for marine crafts; at least one radial stator, at least one rotor, at least two impeller blades, a magnetic bearing; at least one permanent magnet bar; at least one axial stator, hydrodynamic bearing components, a motor housing and an engine fastener; a hydrodynamic jet motor housing; and a control unit including a microprocessor, a software, magnetic bearing distance sensors, counter and speed measurement sensors, gyroscopic balance sensors to provide comfortable travel by collected data to reduce an effect of sea currents and wave movements which are the consequences of seasickness on the passengers at sea, heat and humidity sensors, pressure measurement sensors, voltage and ampere measurement sensors, a motor drive circuitry, software algorithms, an energy management system, a control panel, batteries and battery charging components.

A convertible ducted fan engine and mounting system. The convertible ducted fan engine has a shroud encircling a mechanical fan. The convertible ducted fan engine includes a fluid-propulsion configuration in which the mechanical fan rotates freely with respect to the shroud to produce thrust through fluid flow, and a drive-wheel configuration in which the shroud rotates about the rotational axis.

The foot pedal-powered impeller system comprises a foot crank coupled to an impeller drive via a vertical drive shaft. The foot crank, mounted on the top surface of a water craft, may comprise two pedals that couple to a central spindle via crank arms. The spindle may pass through a right angle gear box which translates rotational motion of the spindle into rotational motion of the drive shaft. The drive shaft may turn a shaft gear on the underside of the water craft which engages an impeller tube gear and turns an impeller tube. An impeller mounted within the impeller tube may force water to enter the front of the impeller drive via an intake nozzle, pass through the impeller tube, and exit through a discharge nozzle. The discharge of water may move the water craft.

The present invention provides an underwater moving vehicle improved in motion performance and capable of stably maintaining its position.

[Solution]

An underwater moving vehicle comprising: a vehicle body (1) configured to be set in advance in such a manner that weight of the vehicle body (1) becomes larger than buoyant force generated in water; a thruster (32) configured to generate an upward thrust by driving screw propellers (21); a drive adjuster (50) configured to control water depth of the vehicle body (1) to a predetermined position by adjusting drive of the screw propellers (21) and generating the upward thrust equivalent to difference between the weight and the buoyant force; and a water flow deflector (34) configured to move the vehicle body (1) in a horizontal direction by deflecting a downward water flow generated by the screw propellers (21).

The present invention provides an underwater moving vehicle improved in motion performance and capable of stably maintaining its position.

[Solution]

An underwater moving vehicle comprising: a vehicle body (1) configured to be set in advance in such a manner that weight of the vehicle body (1) becomes larger than buoyant force generated in water; a thruster (32) configured to generate an upward thrust by driving screw propellers (21); a drive adjuster (50) configured to control water depth of the vehicle body (1) to a predetermined position by adjusting drive of the screw propellers (21) and generating the upward thrust equivalent to difference between the weight and the buoyant force; and a water flow deflector (34) configured to move the vehicle body (1) in a horizontal direction by deflecting a downward water flow generated by the screw propellers (21).

A tugboat having azimuthal propelling units, comprising at least two juxtaposed azimuthal propelling units, characterized in that each of the juxtaposed propelling units has a main shaft with a main axis extending at an angle relative to at least one of a main plane of symmetry or a transverse center plane of the tugboat.

A watercraft propulsion system operably coupled to a watercraft wherein the propulsion system includes a housing assembly having a first housing and a second housing movable with respect to each other so as to provide an operational mode and a standby mode. The first housing includes at least one aperture that is configured to provide access to the interior volume of the first housing. The second housing includes at least one aperture configured to provide access to the interior volume of the second housing. In the operational mode the first housing and second housing are positioned so as to facilitate alignment of the at least one apertures formed therein. In the standby mode the first housing and second housing are positioned so as to provide an offset of the least one apertures. The first housing is movably mounted within the interior volume of the second housing.

A watercraft propulsion system operably coupled to a watercraft wherein the propulsion system includes a housing assembly having a first housing and a second housing movable with respect to each other so as to provide an operational mode and a standby mode. The first housing includes at least one aperture that is configured to provide access to the interior volume of the first housing. The second housing includes at least one aperture configured to provide access to the interior volume of the second housing. In the operational mode the first housing and second housing are positioned so as to facilitate alignment of the at least one apertures formed therein. In the standby mode the first housing and second housing are positioned so as to provide an offset of the least one apertures. The first housing is movably mounted within the interior volume of the second housing.

A thruster assembly to create shaped waves in a water behind a boat for water sports, such as wake surfing. The thruster assembly comprises one or more thrusting channels, an outer body the outer body comprises a round surface in the form of a circular or elliptical cross-section. The outer body comprises an elongated elliptical cross-section being wider than it is tall. A thruster portion comprises a width, a height, and a depth. The outer body comprises an outer surface and an inner surface. The outer body comprises a round surface in the form of a circular or elliptical cross-section. The outer body comprises an elongated elliptical cross-section being wider than it is tall.

A thruster assembly to create shaped waves in a water behind a boat for water sports, such as wake surfing. The thruster assembly comprises one or more thrusting channels, an outer body the outer body comprises a round surface in the form of a circular or elliptical cross-section. The outer body comprises an elongated elliptical cross-section being wider than it is tall. A thruster portion comprises a width, a height, and a depth. The outer body comprises an outer surface and an inner surface. The outer body comprises a round surface in the form of a circular or elliptical cross-section. The outer body comprises an elongated elliptical cross-section being wider than it is tall.