An electrohydrodynamic rotary system and related method that include at least one rotary device comprising a hub portion, an axis of rotation, and at least one blade extending radially from the hub portion. The system includes at least one electrically conductive rotary electrode emitter coupled to the at least one blade proximate to the back edge, and at least one electrically conductive counter electrode positioned proximate to the at least one rotary device in a spaced relationship. The system further includes an electrical system that applies an electric potential difference between the at least one electrically conductive rotary electrode emitter and the at least one electrically conductive counter electrode that generates corona discharges from the at least one rotary electrode that form flows of ionic wind that rotate the at least one rotary device about the axis of rotation in a first direction.

A sponson attachment for an airboat allows the airboat to increase its safety and stability very quickly. A method for attaching a sponson to an airboat hull includes attaching first and second flexible tethers to a side of the sponson. The method also includes removably securing the first flexible tether to an exterior of the airboat hull adjacent a gunnel, and removably securing the second flexible tether below the first flexible tether on the exterior of the hull.

A sponson attachment for an airboat allows the airboat to increase its safety and stability very quickly. A method for attaching a sponson to an airboat hull includes attaching first and second flexible tethers to a side of the sponson. The method also includes removably securing the first flexible tether to an exterior of the airboat hull adjacent a gunnel, and removably securing the second flexible tether below the first flexible tether on the exterior of the hull.

A propeller-powered propulsion system and method of remote-controlled waterway navigation is configured to navigate a waterway in a navigation route while being controlled remotely, and being tracked by a GPS system. The watercraft provides a watercraft body that carries a propeller subassembly having multiple propellers that operate independently of each other for variable propulsion and steering. A mobile communication device transmits a command signal to a receiver in the propeller subassembly. A microcontroller converts the command signal to a speed for each propeller, independently of the other. The propeller speeds create a disproportionate level of thrust from each propeller to enable remote controlled steering of the watercraft toward port and starboard directions, at variable speeds, and preprogrammed navigation routes. The mobile communication device also acquires location data of the watercraft body obtained by a GPS system. The microcontroller processes the location data to automate the navigation of the watercraft.

A transmission (14) for connecting a propeller (15) to an engine (13) having a drive shaft (2), comprising: a first gear (3) driven by the drive shaft (2) in a first rotational direction; an idler gear (4) driven by the first gear; a third gear (5) driven by the idler gear (4); and an output shaft (6) driven by the third gear in the first rotational direction.

A transmission (14) for connecting a propeller (15) to an engine (13) having a drive shaft (2), comprising: a first gear (3) driven by the drive shaft (2) in a first rotational direction; an idler gear (4) driven by the first gear; a third gear (5) driven by the idler gear (4); and an output shaft (6) driven by the third gear in the first rotational direction.

A tow bar assembly for use in a droneboarding system is disclosed. The tow bar assembly includes a shaft adapted to be connected to an unmanned aerial vehicle via at least one tension line. A multi-axis interface device is associated with the shaft and is adapted to receive flight control commands from a user holding onto the shaft. A flight controller is mounted to the shaft and is adapted to generate flight control signals for controlling the flight path of the unmanned aerial vehicle according to the flight control commands received from the user via the multi-axis interface device. The flight controller is further adapted to wirelessly transmit the flight control signals to the unmanned aerial vehicle.

A search and rescue drone system includes a buoyant body member, a frame attached to the buoyant body member for carrying a motor and propeller, and an electronic array including a camera, GPS, an EPIRB radio distress beacon, and a transmitter/receiver for remote control flying the drone and communicating with an operator. A laser guidance system may provide coordinates for landing near a swimmer in distress. The search and rescue drone may also be programmed to simply fly to the location of an electronic wearable device, like a bracelet, that is worn by a man overboard. In another embodiment, the search and rescue drone includes pivoting motor mounts, so that it can take off and land vertically with propellers rotating in a horizontal plane, and then the propellers may pivot to rotate in a vertical plane for propulsion across water similar to a fan boat with rescued people aboard.

A search and rescue drone system includes a buoyant body member, a frame attached to the buoyant body member for carrying a motor and propeller, and an electronic array including a camera, GPS, an EPIRB radio distress beacon, and a transmitter/receiver for remote control flying the drone and communicating with an operator. A laser guidance system may provide coordinates for landing near a swimmer in distress. The search and rescue drone may also be programmed to simply fly to the location of an electronic wearable device, like a bracelet, that is worn by a man overboard. In another embodiment, the search and rescue drone includes pivoting motor mounts, so that it can take off and land vertically with propellers rotating in a horizontal plane, and then the propellers may pivot to rotate in a vertical plane for propulsion across water similar to a fan boat with rescued people aboard.

An agricultural amphibious bait feeding boat includes a boat body. A bait feeding device is fixed to one end of the boat body, and a propulsion device is fixed to the other end of the boat body. The boat body includes two foam floating bodies, foam fixing carbon rods, a transverse carbon rod, tube ferrule fixing assemblies, and tee joints. The two foam floating bodies include a left foam floating body and a right foam floating body, the foam fixing carbon rods parallel to each other are respectively arranged above the two foam floating bodies, and the foam floating bodies and the foam fixing carbon rods are fixed through the tube ferrule fixing assemblies. The transverse carbon rod is connected to the foam fixing carbon rods through the tee joints, and the left foam floating body and the right foam floating body are fixedly connected to each other.