An unmanned vehicle capable of tunneling into soft materials, such as sand, comprises a hollow, bullet-shaped forward outer body with a first drive screw thread integrated into its exterior, a hollow cylindrical rear outer body with a second drive screw thread integrated into its exterior but threaded in the opposed direction of the first drive screw thread, and an inner body that is rotatably coupled to the inside of the forward and rear outer bodies via mechanical gears, and including directional control fins mounted on a housing at the rear end of the inner body.

A control system for a marine vessel that includes a drive source and an operator that receives an operation is able to switch a control mode of the drive source without providing an additional operator. An operation received by the operator when the drive source is resting is disabled, and a function of switching a control mode of the drive source is assigned to the operation of the operator that is received when the drive source is resting.

A control system for a marine vessel that includes a drive source and an operator that receives an operation is able to switch a control mode of the drive source without providing an additional operator. An operation received by the operator when the drive source is resting is disabled, and a function of switching a control mode of the drive source is assigned to the operation of the operator that is received when the drive source is resting.

A retrofit propulsion apparatus attaches to an avian decoy to provide both propulsion and steering to the decoy under remote control by the user. The retrofit propulsion apparatus attaches to decoys with different keel geometries without the need to modify the retrofit propulsion apparatus for each decoy keel geometry. The apparatus includes a housing that contains electrical circuitry with control circuitry that couples to inboard water propulsion devices to provide thrust and steering to the decoy. A housing cover sealably attaches to the housing to seal the housing. The housing cover includes a slot that receives a vertical member of a decoy keel. The housing includes an angled channel that receives both a decoy with a decoy bottom member with vertical spaced apart sides and a decoy with a decoy bottom member with angled sides.

A marine vessel maneuvering system includes a marine propulsion unit including an electric motor, an input to input a neutral command to stop the electric motor and to input a drive command to drive the electric motor, a start switch to switch a stopped state in which the electric motor is not driven to a ready-to-be-driven state in which the electric motor is ready to be driven, and a controller configured or programmed to perform a control to switch the stopped state to the ready-to-be-driven state upon a user operating the start switch when a main power supply that controls a power supply to an on-board device of a hull is in an on state, the neutral command is being input to the input, and a marine vessel is in the stopped state.

A marine vessel maneuvering system includes a marine propulsion unit including an electric motor, an input to input a neutral command to stop the electric motor and to input a drive command to drive the electric motor, a start switch to switch a stopped state in which the electric motor is not driven to a ready-to-be-driven state in which the electric motor is ready to be driven, and a controller configured or programmed to perform a control to switch the stopped state to the ready-to-be-driven state upon a user operating the start switch when a main power supply that controls a power supply to an on-board device of a hull is in an on state, the neutral command is being input to the input, and a marine vessel is in the stopped state.

The invention relates to a stator (8) for an electric rotating machine (2), which stator has a laminated stator core (16) having coil bars (20) and has at least one stator winding head board (24) having an insulating main body (28). In order to reduce the axial length of the stator (8), according to the invention, conducting tracks (26) are integrated into the insulating main body (28), wherein the at least one stator winding head board (24) lies on an end face (23) of the laminated stator core (16) and wherein the conducting tracks (26) are integrally bonded to the coil bars (20).

The invention relates to a stator (8) for an electric rotating machine (2), which stator has a laminated stator core (16) having coil bars (20) and has at least one stator winding head board (24) having an insulating main body (28). In order to reduce the axial length of the stator (8), according to the invention, conducting tracks (26) are integrated into the insulating main body (28), wherein the at least one stator winding head board (24) lies on an end face (23) of the laminated stator core (16) and wherein the conducting tracks (26) are integrally bonded to the coil bars (20).

A modular, weight-shift controlled watercraft device is disclosed which includes: a modular board removably attachable to a power system. The power system includes a modular power supply system, and a modular propulsion system. The power supply system includes a housing including a battery. The propulsion system includes a modular strut, a modular propulsion pod, and a modular hydrofoil. In one embodiment, the power supply system is removably and mechanically attachable directly to the propulsion system.

A modular, weight-shift controlled watercraft device is disclosed which includes: a modular board removably attachable to a power system. The power system includes a modular power supply system, and a modular propulsion system. The power supply system includes a housing including a battery. The propulsion system includes a modular strut, a modular propulsion pod, and a modular hydrofoil. In one embodiment, the power supply system is removably and mechanically attachable directly to the propulsion system.