The invention relates to a method for constructing and/or manufacturing a water sports device (2) which has a modular structure comprising a floating body (4). The modules can be connected together via interfaces and are connected during operation. In particular, the invention relates to a method for constructing and/or manufacturing a foilboard or driver propulsion vehicle, wherein a server device is provided, and a program-controlled input interface is provided for user-defined inputs on a terminal (5), in particular a mobile terminal, which is arranged at a distance from the server device in particular. The modules are imaged in a computer program of the server device and/or of the terminal (5), and at least one outer contour of the floating body (4) of the water sports device (2) can be, in particular, freely defined by the user. On the basis of the outer contour of the floating body (4) defined in the program, automated manufacturing information is produced, and the floating body (4) manufactured according to the production information can be combined with another module, in particular multiple other modules, to produce the water sports device (2). The invention also

A handheld underwater aircraft includes a battery compartment (12) and propellers. There are at least two propellers, which are symmetrically distributed on both sides of the battery compartment (12), and are connected to the battery compartment (12). A special design with axes of the propellers being unparallel with an axis of the battery compartment (12) is adopted, and unparallel included angles make component forces generated by the various propellers in a direction of motion of a non-underwater aircraft offset each other, and enable the underwater aircraft to maintain balanced and forward-forward motion. The design with the axes of the propellers being unparallel with the axis of the battery compartment (12) leads to a little power loss, but avoids a larger power loss caused by the impact of water on the human body, thereby comprehensively improving the thrust of the underwater aircraft in use.

The present application relates to the field of underwater propeller, and more particular, to a multifunctional underwater propeller, which includes a propeller body. The propeller body is detachably connected with a handle, and a surface of the propeller body is connected with an adapter structure for detachably connecting external equipment. The adapter structure includes a connecting piece and a slide rail, and the connecting piece is in plug-in connection with the slide rail, and configured for detachably connecting the external equipment.

Disclosed is an underwater booster, comprising a cabin body (5), a first mounting structure of thruster (1) and a second mounting structure of thruster (8) symmetrically disposed on two sides of the cabin body (5); a first connecting structure (2) and a second connecting structure (7) symmetrically disposed on the two sides of the cabin body (5), wherein the first mounting structure of thruster (1) is connected with the cabin body (5) via the first connecting structure (2), and second mounting structure of thruster (8) is connected with the cabin body (5) via the second connecting structure (7); a handle is disposed on the first connecting structure (2) and the second connecting structure (7) for gripping, and an axis of the first mounting structure of thruster (1) is not parallel to an axis of the second mounting structure of thruster (8). The structure can improve user experience.

Disclosed is a compact egg-shaped propeller, including an outer shell, an inner shell, and a driving motor unit arranged in the inner shell. The outer shell is detachably connected to the inner shell; the outer shell is egg-shaped; the outer shell is provided with a front cover at a top of the driving motor unit; the outer shell is provided with a jet orifice at a tail portion of the driving motor unit; blades are connected to one side of the driving motor unit close to the front cover; the driving motor unit is connected to a main control compartment; foldable handles are connected to a left side and right side of the main control compartment respectively; and the foldable handles are movably connected to the inner shell. By means of the layout, the gravity center is centered, the structure is compact and simple, and the appearance is simple and beautiful; the blades and the motor are designed in front, and the semi-circular front cover prevents debris and hands from entering; a battery indicator can display current remaining power to a user; a buoyancy block ensures that the whole device does not sink down after a user loosens the hands in water, facilitating search; and when the device is not in use, the handles can be folded, thereby facilitating storage and carrying.

A low emission submersible engine is part of a multipurpose aquatic device, such as an aquatic craft or an electrical generator. A propulsion system having a propeller is coupled to the submersible engine to produce a swimmer propulsion machine and a generator is attached to the engine to produce an electrical generator. The submersible engine receives air from a snorkel that extends up above a water line. The aquatic device has a fuel reservoir which may receive liquid fuel or may receive a fuel cylinder. Floatation chambers keep the aquatic device afloat with the engine submerged. The exhaust assembly and exhaust ports from the engine may also be submerged and the exhaust ports may provide additional thrust. A propulsion system housing integrates the drive shaft and propeller, clutch coupler, exhaust conduits and water flow conduits and is detachably attachable to the engine.

The present disclosure relates to an underwater thruster, comprising a power part and a propeller, wherein the power part is provided at the upstream of the propeller for driving the propeller to rotate. The underwater thruster further comprises: a water inlet part, which the power part is provided at the upstream or internally of the water inlet part, the water inlet part being provided with a water inlet, one end and the other end of the water inlet part being columnar, and the diameter of radial cross-sections of the water inlet part gradually increasing from one end to the other end of the water inlet part; and a water outlet part, which is provided at the downstream of the water inlet part, one end of the water outlet part being provided with a water outlet, wherein the water inlet part is adjacent to the propeller and provided at the upstream of the propeller, and the propeller is provided inside the water outlet part. According to the present disclosure, by improving the structure of the underwater thruster, the guide stability of the underwater thruster in use is improved, and the kinetic energy utilization rate is increased.

A handheld underwater aircraft includes a battery compartment (12) and propellers. There are at least two propellers, which are symmetrically distributed on both sides of the battery compartment (12), and are connected to the battery compartment (12). A special design with axes of the propellers being unparallel with an axis of the battery compartment (12) is adopted, and unparallel included angles make component forces generated by the various propellers in a direction of motion of a non-underwater aircraft offset each other, and enable the underwater aircraft to maintain balanced and forward-forward motion. The design with the axes of the propellers being unparallel with the axis of the battery compartment (12) leads to a little power loss, but avoids a larger power loss caused by the impact of water on the human body, thereby comprehensively improving the thrust of the underwater aircraft in use.

The present application relates to the field of underwater propeller, and more particular, to a multifunctional underwater propeller, which includes a propeller body. The propeller body is detachably connected with a handle, and a surface of the propeller body is connected with an adapter structure for detachably connecting external equipment. The adapter structure includes a connecting piece and a slide rail, and the connecting piece is in plug-in connection with the slide rail, and configured for detachably connecting the external equipment.

An underwater swimming aid includes a power device and a camera instrument fixing device, and the power device includes a propeller for providing power to drive the underwater swimming aid to advance and a connecting plate fixed to the propeller; and the camera instrument fixing device includes a mounting bracket and a fixing bracket, the mounting bracket is fixed to the connecting plate and is fixedly connected to the fixing bracket, and the fixing bracket is used for fixing a camera instrument. According to the underwater swimming aid, the camera instrument fixing device is fixed to an existing underwater swimming aid, and the camera instrument is mounted on the camera instrument fixing device, so that users can photograph underwater scenes while enjoying funs brought by the swimming aid.