Abstract: A track system comprising a dynamic tensioning device located between an idler wheel and the support frame as to apply proper tension in the track. The dynamic tensioning device is adapted to block at its current length upon the occurrence of a determined condition. The dynamic tensioner is adapted to substantially maintain its length when an acceleration and or deceleration of the track system reaches a predetermined value. For instance, such characteristic is relevant in an event of emergency braking. A dynamic tensioner would become contracted and the tension in the endless track would become too low. A low tension could cause the endless track to ratchet.

Abstract: An embodiment is developed for a cylindrically shaped, elliptical rolling robot that has the ability to morph its outer surface as it rolls. The morphing actuation alters lengths of the major and minor axes, resulting in a torque imbalance that rolls the robot along faster or brakes its motion. A control scheme is implemented, whereby angular position and horizontal velocity are used as feedback to trigger and define morphing actuation. A goal of the control scheme is to cause the robot to follow a given velocity profile comprised of steps and ramps. Equations of motion for the rolling robot are formulated, which include rolling resistance torque caused by deformation of the outer surface tread. A computer program solves the equations of motion, and resulting plots show that by automatically morphing its shape in a periodic fashion, the rolling robot is able to commence from an initial position, achieve constant average velocity and slow itself.

Abstract: A technique for facilitating automation of fitting a wire harness to a vehicle is provided. A wire harness module includes a wire harness formed in a packed shape. Connectors each attached to an end of the wire harness are attached to specific positions on the wire harness. Fixtures for fixing the wire harness to the vehicle are attached to specific positions on the wire harness. Identification information unique to the wire harness is recorded in a tag. The identification information is used when acquiring attachment position information, which indicates the positions at which the connectors and fixtures are attached.

Abstract: An anti-theft lock for bicycles and other vehicles powered by a person, which lock can be switched over from a locking state into a move state, containing means for tamper-proof attachment of the lock to the vehicle, and a control unit for switching over the lock from the locking state into the move state, and vice versa, is characterized in that the control unit has a receiver for signals of an associated mobile transmitter which are transmitted in a wireless fashion and means for determining the distance of said control unit from the mobile transmitter; the control unit switches over the lock into the locking state if the distance exceeds a threshold value and the vehicle is simultaneously not travelling; and the control unit switches over the lock into the move state if the distance undershoots a threshold value.

Abstract: Provided is a saddled-vehicle cowl structure capable of effectively supplying outside air to a power unit. A saddled-vehicle cowl structure includes a main seat on which an occupant is seated, a side cowl that covers a side lower part of the main seat, an air cleaner box provided below the main seat and connected to a power unit, and an air intake duct for supplying outdoor air to the air cleaner box. The side cowl includes an inner side cowl and an outer side cowl disposed on a vehicle width direction outer side of the inner side cowl. An air intake port for supplying traveling wind to the air intake duct is provided near a front end portion of the inner side cowl. The air intake port is covered by the outer side cowl from an outer side.

Abstract: A retractable top for a motorcycle including a windshield and a storage compartment, the retractable top is provided with at least one hinge secured to the storage compartment, at least one folding member for pivotably securing a front section of the retractable top to an adjacent section of the retractable top, and at least one buckle for securing the front section of the retractable top to the windshield. Each buckle includes a first hook disposed on an inner surface of the windshield, a pivotal loop configured to place on the first hook, a second hook disposed on an inner surface of the front section of the retractable top, and a third hook pivotably secured to the pivotal loop and configured to secure to the second hook. The retractable top and the windshield are configured to releasably fasten together.

Abstract: The present disclosure relates to a self-balancing vehicle, which includes an intermediate bracket, a first connecting shaft, a second connecting shaft, a first pedal assembly, a second pedal assembly, a first motor and a second motor. One end of the first connecting shaft and one end of the second connecting shaft are respectively disposed on two opposite sides of the intermediate bracket, and are rotatable with respect to the intermediate bracket, respectively, the other end of the first connecting shaft is fixed to the first pedal assembly, the other end of the second connecting shaft is fixed to the second pedal assembly, the first motor includes a first output shaft rotatably disposed on the first pedal assembly, the second motor includes a second output shaft rotatably disposed on the second pedal assembly.

Abstract: Two-wheeled motor-driven vehicles are disclosed. In one embodiment, a two-wheeled motor-driven vehicle includes a chassis, a central unit including a drive unit and a seat carrier, and a cockpit including a steering mechanism and an operating unit. Front and/or rear wheels are carried on respective wheel mounts that rotatably carry the wheels via a roller bearing. The wheel mounts have a first toroidal wheel bearing rim and a second toroidal wheel bearing rim mountable to a wheel rim.

Abstract: The invention is a foldable, personal transportation device. It can be ridden either by manual propulsion, that is, pushing backward with a foot on the ground while standing with the other foot on the riding platform. It may also be used with electric motor propulsion. When folded, the device is free standing. It can also be pulled, while remaining on the ground, in its folded state.

Abstract: A bicycle front fork includes two extension tubes connected to each other at two respective top ends thereof. A steering tube is connected to a position where the two respective top ends of the two extension tubes are connected. The steering tube has at least one groove defined axially in the outer surface thereof. The at least one groove receives at least one control cable therein. The at least one control cable is hidden when the head tube is installed to the bicycle frame.

Abstract: A bicycle operating device comprises a base member, an operating member, and a piston. The base member has a longitudinal axis defined along a center axis of a free end of a bicycle handlebar in a mounting state where the base member is mounted to the free end of the bicycle handlebar. The base member includes a cylinder bore having a cylinder center axis. The cylinder bore is at least partly arranged in the bicycle handlebar in the mounting state. The operating member is pivotally coupled to the base member about a pivot axis. The cylinder center axis is inclined relative to the longitudinal axis by an inclination angle equal to or larger than 4 degrees. The piston is movably provided in the cylinder bore and operatively coupled to the operating member to move in the cylinder bore in response to a pivotal movement of the operating member.

Abstract: A bicycle operating device comprises a base member, an operating member, an operating structure, and an operating unit. The operating member is movable relative to the base member between a rest position and an operated position. The operating structure includes a take-up member movable relative to the base member to move a first operation cable in a pulling direction and a releasing direction opposite to the pulling direction. The operating unit is mounted to the base member to operate a second bicycle component in response to an input operation from a user. The operating unit includes an electrical switch and a controller. The electrical switch is configured to receive the input operation from the user. The controller is configured to generate an operation signal to operate the second bicycle component in response to the input operation inputted from the electrical switch.

Abstract: A bicycle component mounting device comprises a base member, a holding member, a movable member, and a guide structure. The base member includes a mounting portion. The holding member is movably mounted to the mounting portion. The movable member is movably mounted relative to the base member to push the holding member relative to the mounting portion. The guide structure is configured to guide the holding member relative to the mounting portion in a guide direction inclined relative to a longitudinal axis in response to a movement of the movable member. The guide structure includes a recess and a protrusion. The recess is provided at one of the mounting portion and the holding member. The protrusion is configured to be disposed in the recess and provided at the other of the mounting portion and the holding member.

Abstract: A drive device for an electric bicycle includes a drive housing rigidly connected to a frame of the electric bicycle and a bottom bracket shaft arranged to rotate in the drive housing. First and second pedal cranks are arranged at respective ends of the bottom bracket shaft. The first and second pedal cranks are arranged to rotate with the bottom bracket shaft. A summing hollow shaft is rotatably supported in the drive housing. The summing hollow shaft is directly connected to the bottom bracket shaft via a cyclist's freewheel and, via a motor freewheel, to a gear driven by an electric motor. The summing hollow shaft is connected to a chain wheel for rotation therewith. A sensor assembly fixedly arranged in the drive housing includes a first torque sensor which cooperates with the bottom bracket shaft, and a second torque sensor which cooperates with the summing hollow shaft.

Abstract: A bicycle controller includes an electronic control unit. The electronic control unit controls a transmission device that changes a ratio of a rotational speed of a wheel of a bicycle to a rotational speed of a crank of the bicycle, and a motor that transmits torque to an upstream side of the transmission device in a transmission path of a manual driving force that is input to the crank. The electronic control unit switches between a first mode that drives the motor in accordance with the manual driving force and a second mode that allows the motor to be driven to assist walking of the bicycle. The electronic control unit controls the transmission device to change the ratio upon detection of the electronic control unit switching between the first mode and the second mode or the electronic control unit being in the second mode.

Abstract: Disclosed is a mooring line connector assembly for connecting a mooring line to a floating structure, including: a tubular housing connectable to the floating structure, having a lower housing end and an upper housing end with an inner circumference; a connector body extending along a connector axis, having an upper connector body end and a lower connector body end connected to the mooring line; a guiding body rotatably arranged on the connector body to be freely rotatable around the connector body and the connector axis, including first rotation unit on an outer surface of the guiding body and a guiding part having an outer circumference at an upper guiding body end; and second rotation unit arranged on an inner surface of the tubular housing, arranged for engaging the first rotation unit.

Abstract: A multi-adjustable watercraft chock includes a base having opposite ends attachable on a surface, a pair of arms pivotally connected at inner ends to the base at opposite locations proximate the opposite ends of the base, contact bodies disposed at outer ends of the arms, couplers connecting the contact bodies with respective outer ends of the arms so as to define a pair of pivotal axes spaced apart from, and orthogonally oriented relative to, one another such that one contact body is pivotal in orthogonal directions relative to the respective outer end of one arm, and angular adjustment mechanisms coupling the arms to proximate the outer ends of the base so as to enable the arms to be continuously angularly adjusted to selectively extend from the base in oppositely flared configuration and arm outer ends and therewith bodies to thereby raise or lower relative to the base.

Abstract: A watercraft including a frame and a folding ladder coupled to the frame. The folding ladder is configured for moving in between a folded position and an unfolded position. The ladder includes a stabilizing portion connected to the frame and defining a stabilizing plane and a first stair portion pivotably connected to the stabilizing portion. The first stair portion pivots relative to the stabilizing portion in a first direction of rotation. The ladder further includes a second stair portion pivotably connected to the first stair portion. The second stair portion pivots relative to the first stair portion in a second direction of rotation which is opposite to the first direction of rotation of the first stair portion such that the ladder selectively folds between the folded position and the unfolded position.

Abstract: The present invention relates to a floating mounting (1) which includes ballasting means (2) in order to vary the draught of the floating Lfb mounting. The floating mounting (1) according to the invention has a depth-variable horizontal cross-section, such that the second moment of area of the cross-section of the floating mounting, at the buoyancy surface (Sd), is higher when the floating mounting is deballasted, compared with the second moment of area of the buoyancy surface of the floating mounting, at the buoyancy surface (Sb), when the floating mounting is ballasted.

Abstract: A surfboard includes a core covered with a laminate and having curved perforations in the deck area and the tail area of the surfboard, in order to prevent air blisters from forming between the core and laminate. The curved perforations are deformable under pressure to minimize the opening of the perforations to inhibit liquid from entering and maximizing under zero pressure to allow the maximum amount of trapped liquid and gasses from escaping. The core is formed from an extruded closed-cell polystyrene foam block that has been shaped by restraining it against a shaped form using shaped restraining tools and straps, and heating it; and by cutting using a hot wire. The core is laminated with FIBERGLAS® and epoxy resin, and the perforations are formed using a perforating tool that has a planar or curved working surface and one or more heated needles extending perpendicularly from the working surface.

Abstract: The invention relates to a surfboard with an inflatable main part (1) having a front (2) and securing means which are arranged on the front (2) and which are provided for a drive component (20), said drive component (20) comprising an electric drive. The body component 1 has a longitudinal direction L which extends from the tail 2 of the body component 1 to the nose 3 of the body component 1.

Abstract: A first unit acquires attribute record data and a second unit acquires deterioration degree data from a terminal device mounted on a ship. The attribute record data indicates an attribute relating to a past sailing of the ship. The deterioration degree data indicates a deterioration degree, which is checked during performance of maintenance work, of each device mounted on the ship. A third unit generates relational data indicating a relation between various attributes relating to the state of the sailing of the ship and the deterioration degree of the device based on the attribute record data and deterioration degree data. A fourth unit acquires estimated attribute data indicating an estimated value of the attributes relating to sailing of the ship. A fifth unit generates timing data indicating a timing of maintenance work to be performed on each device based on the attribute record data, estimated attribute data, and relational data.

Abstract: Disclosed herein is a floating recovery device for underwater equipment. The device includes a recovery body partitioned into a first compartment, a second compartment, and a third compartment by a partition wall, first and second pressure tanks installed in the first and second compartments, respectively, first and second striking parts fastened to the first and second pressure tanks, respectively, to strike the first and second pressure tanks, first and second actuators wirelessly actuating the first and second striking parts, respectively, and a buoyancy generator installed in the third compartment, and inflated by high-pressure gas introduced from the first and second pressure tanks, thus generating buoyancy. Such a configuration allows the pressure tank to be wirelessly struck for the purpose of supplying high-pressure gas to the buoyancy generator and floating the underwater equipment in the event of the loss of the underwater equipment.

Abstract: A snorkel is provided. The snorkel has a mouthpiece portion and a waterproof structure which is disposed at an end opposite to the mouthpiece portion. The waterproof structure has a tube body and a lid body. At least one vent and a first stopper are disposed at the tube end portion of the tube body. The lid body has an opening and a second stopper. The tube end portion is provided within the lid body by passing through the opening. When the waterproof structure is located above the water, the waterproof structure is in fluid communication with the mouthpiece portion by the opening and the vent. When the waterproof structure is located below the water, the lid body is floated upwards so that the second stopper contacts with the first stopper portion to substantially block flow of the water from the opening into the vent of the tube body.

Abstract: An apparatus includes first and second tanks each configured to receive and store a refrigerant under pressure. The apparatus also includes at least one generator configured to generate electrical power based on a flow of the refrigerant between the tanks. The apparatus further includes a collector configured to transfer solar thermal energy to one of the tanks to heat the refrigerant in that tank and/or radiate thermal energy from one of the tanks into an ambient environment to cool the refrigerant in that tank. In addition, the apparatus could include first and second insulated water jackets each configured to receive and retain water, where the first tank is located within the first insulated water jacket and the second tank is located within the second insulated water jacket.

Abstract: A system includes a vehicle having a body and a power generation system. The power generation system includes first and second tanks each configured to receive and store a refrigerant under pressure. The power generation system also includes at least one generator configured to generate electrical power based on a flow of the refrigerant between the tanks. The first tank is configured to be cooled by one of ambient air and water to a lower temperature, and the second tank is configured to be warmed by another of the ambient air and the water to a higher temperature. The first tank or associated heat exchanger can be positioned such that the first tank is above the water's surface when a portion of the body breaches the surface. The second tank or associated heat exchanger can be positioned such that the second tank is below the water's surface when a portion of the body breaches the surface.

Abstract: An outboard motor includes an engine including a plurality of cylinders, a cowling including an internal space, a drive force transmission shaft, and a supercharger driven by the drive force transmission shaft. An upper end of the supercharger is disposed below an upper end of an uppermost one of the plurality of cylinders in the internal space of the cowling.

Abstract: An outboard motor having an internal combustion engine that causes rotation of a driveshaft, a planetary transmission that operatively connects the driveshaft to a transmission output shaft, a band brake configured to shift the planetary transmission amongst a forward gear, neutral gear and reverse gear, a hydraulic actuator is configured to actuate the band brake, and a cooling water circuit that extends adjacent to the hydraulic actuator so that the hydraulic actuator exchanges heat with cooling water in the cooling water circuit.

Abstract: When a main switch is turned on, a main relay is energized so as to supply electric power to a computer system; when an engine starting switch is turned on, an engine is started and energization of the main relay is continued; when an engine stopping switch is turned on, the engine is stopped, and the main relay is de-energized so as to stop supply of electric power to the computer system.

Abstract: An airship hull is disclosed. The airship hull comprises a gas-tight shape fabricated from a membrane. The airship hull comprises one or more fibers applied to an outer surface of the gas-tight shape in a continuous manner such that a particular one of the one or more fibers wraps around a circumference of the gas-tight shape multiple times, wherein the applied one or more fibers are affixed to the outer surface of the gas-tight shape.

Abstract: High-altitude balloons and apparatuses for filling such high-altitude balloons are provided. As an example, an apparatus for filling a high-altitude balloon includes a tube extending through envelope material of the balloon is provided. The apparatus also includes a flange connected to a first end of the tube. The flange is connected to an interior surface of the balloon. A fitting is connected to a second end of the tube. The fitting is configured for attachment with an apparatus for filling the balloon with lift gas. In addition, methods of filling high-altitude balloons with lift gas and methods of manufacturing balloons are also provided.

Abstract: A heavy-lift UAV frame includes a central frame portion having a symmetrical shape and forming a pocket area for receiving an avionics package. Top and bottom plates are secured to the central frame portion and include four corner members that extend diagonally outward therefrom. A plurality of boom arms are pivotally connected to the corner members and transition between an extended position for flight and a retracted position for storage and transport. Each boom arm includes a complementary dimension to one side of the central frame portion and is arranged parallel thereto when in the retracted position.

Abstract: A cabin structural component for a transport vehicle, in particular for an aircraft or spacecraft, has a sandwich structure that has a core and a first cover layer, the first cover layer being provided with a heat conductor that is arranged and designed for heating a cabin wall that can be produced using the cabin structural component.

Abstract: A vehicle body may have an internal skeleton, and a skin fabricated in-situ over the internal skeleton. The internal skeleton may be fabricated via a first additive manufacturing system. The skin may be fabricated via a second additive manufacturing system that is different from the first additive manufacturing system.

Abstract: A rotating retractable step system positioned within a cutout of a wall is presented. The rotating retractable step system comprises a foot pedal and a support shaft. The foot pedal is configured to be stowed in a vertical orientation within the cutout of the wall, and to rotate between the vertical orientation and a horizontal orientation. The support shaft is associated with the foot pedal, such that movement of the support shaft extends the foot pedal outwardly away from the cutout, or retracts the foot pedal towards the cutout.

Abstract: A vehicle body may have an internal skeleton forming a wing shape and a fuselage shape, and a skin fabricated in-situ over the internal skeleton. The skin may include a matrix material, and a plurality of continuous fibers at least partially coated with the matrix material. The plurality of continuous fibers may extend from the wing shape over the fuselage shape.

Abstract: An aircraft wing that is rotatable about its spar, the spar attached to a fuselage or a central structural member of the aircraft, with the wing rotatable about the spar, and the wing rotatable to flex or tilt the wing, to change the aerodynamic properties of the wing. The wing includes ribs along the length of the wing and the spar is held stationary at a spar-anchor attachment to the central structural member, with each rib of the wing able to rotate about the spar as held by each rib.

Abstract: A fairing for an aircraft is disclosed in which the fairing comprises a first fairing portion configured to be fixedly attached to a first structural component and having a first edge; a second fairing portion configured to be fixedly attached to a second structural component and having a second edge, wherein the first edge and the second edge define an interface configured to enable relative movement between the first fairing portion and the second fairing portion.

Abstract: A wing for an aircraft includes a wing structure attachable to a body of an aircraft, at least one high lift body movably supported at the wing structure, a drive unit coupled with the wing structure and the high lift body and adapted to move the high lift body relative to the wing structure in a chordwise direction between a retracted position and an extended position, and a sealing device coupled with the high lift body and the wing structure. The high lift body comprises at least one outer edge facing to the wing structure, which at least one outer edge creates a gap to the wing structure at least in an extended position. The sealing device includes a flexible sealing body, which seals the intermediate space between the high lift body and the wing structure in extended positions of the high lift body.

Abstract: A detachable propeller holder device includes a propeller holder module, a fixed seat and a motor module. Paddles are located the propeller holder module, a buckling component is located on the propeller holder module, the buckling component includes two elastic arms and two hooks, the two elastic arms are symmetrically located at two sides of the propeller holder module, the hooks are respectively located at an end of the two elastic arms and are respectively buckled with two limit portions which are symmetrically located at the fixed seat, so as to fix the propeller holder module to the fixed seat. In the present invention, only the buckling component at the side of the propeller holder module is pinched by fingers to deform inwardly till the hooks are detached from the limit portions of the fixed seat, and then the propeller holder module is pulled upwardly to be removed.

Abstract: A system for reducing drag on an aircraft includes an ambient air inlet positioned in or near a wingtip fence and or winglet of the aircraft and an air pressurization device, such as an air compressor, coupled to the ambient air inlet. The air pressurization device has an inlet oriented toward the ambient air inlet. The air pressurization device has an outlet oriented toward an interior of the aircraft.

Abstract: A deployable vortex generator attached to a lifting surface includes a vane moveable relative to the lifting surface. The vane moves from a deployed position to a retracted position in response to a change in ambient conditions. In the deployed position, the vane acts on the air flow to create vortices. In the retracted position, the vane is closely aligned with the free stream velocity.

Abstract: A drive system for an aircraft landing gear, the drive system including a pinion gear, a drive shaft arranged to rotate the pinion gear about a drive axis, a driven gear arranged to mesh with the pinion gear to be rotatable by the pinion gear, the driven gear being connectable to a wheel of the landing gear to be capable of rotating the wheel about a wheel axis; and a flexible interface. The flexible interface includes a plurality of driven gear coupling members, each driven gear coupling member having a first connection portion attached to the driven gear, a second connection portion adapted to be attached to the wheel at an offset distance from the wheel axis, and a joint between the first connection portion and the second connection portion, the joint permitting relative movement between the first connection portion and the second connection portion.

Abstract: An aircraft has a fuselage, a first rotor assembly having a first rotor hub and first rotor blades pivotably coupled to the first rotor hub and a second rotor assembly having a second rotor hub and second rotor blades pivotably coupled to the second rotor hub. The first and second rotor blades have deployed configurations extending generally radially from the fuselage and stowed configurations extending generally parallel with the fuselage. A sequencing cam, positioned between the first and second rotor hubs, is coupled to the second rotor blades. The sequencing cam has a retracted orientation when the second rotor blades are in the stowed configuration and an extended orientation when the second rotor blades are in the deployed configuration in which the sequencing cam props support arms of the first rotor blades preventing transition of the first rotor blades from the deployed configuration to the stowed configuration.

Abstract: In one embodiment, a magnetic orientation detent includes a motor coupled to a motor shaft, the motor mechanically coupled to a motor mount. The magnetic orientation detent may also include a flywheel mechanically coupled to a distal end of the motor shaft. The magnetic orientation detent may further include a first plurality of magnets coupled to the motor mount and a second plurality of magnets coupled to the flywheel. The second plurality of magnets couple magnetically to the first plurality of magnets.

Abstract: An aircraft system includes a wing member and a plurality of unmanned aircraft systems selectively connectable to the wing member. The wing member has a generally airfoil cross-section, a leading edge and a trailing edge. The unmanned aircraft systems have a connected flight mode while coupled to the wing member and an independent flight mode when detached from the wing member. In the connected flight mode, the unmanned aircraft systems are operable to provide propulsion to the wing member to enable flight. The unmanned aircraft systems are operable to be launched from the wing member to perform aerial missions in the independent flight mode and are operable to be recovered by the wing member and returned to the connected flight mode. Thereafter, in the connected flight mode, the unmanned aircraft systems are operable to be resupplied by the wing member.

Abstract: A computer-implemented method for managing the flight of a drone comprising a physical treatment device, the method comprises the steps repeated over time of measuring the distance between the drone and an object present in the environment of the drone; adjusting the distance from the drone to the object according to predefined internal parameters; and performing a physical treatment on the object from the drone. Developments describe the management of distances to objects, surface tracking, object recognition, the installation of beacons in the environment, the use of on-board or remotely accessed sensors (e.g. position and contact sensors, cameras, motion detectors) and various types of treatment (e.g. cleaning, dusting, sterilization). Both software aspects (e.g. learning, central or distributed logic, autonomy, cooperation with floor robots) and system aspects (addition of a fan, brush, duster or germicidal lamp) are described.

Abstract: Apparatus, methods and systems to associate a flight plan of an unmanned aerial vehicle (e.g., a drone) with a cryptographic signature are disclosed herein. Some disclosed examples include one or more non-transitory computer-readable media including computer-executable instructions. The computer readable instructions, when executed by one or more processors, cause the one or more processors to compare a flight path over a geographic area of an unmanned aerial vehicle to a geographically identified no-fly zone. The flight path is included in a flight plan. The instructions also cause the vehicle to determine whether the flight path enters the geographically identified no-fly zone, and based on whether the flight path is determined to enter the geographically identified no-fly zone, associate the flight plan with a cryptographic signature.

Abstract: A personal propulsion device, including a platform configured to support a passenger's body; and at least one fluid discharge nozzle coupled to the platform and angled with respect to the platform, where the angle defined between the nozzle and the platform is between approximately 95° and 120°; where the personal propulsion device is configured to receive pressurized fluid from a remote pressurized fluid source, and where the personal propulsion device is configured to achieve flight.

Abstract: A method for transporting liquid with a UAV transport that includes docking the UAV transport with a first station and supplying the UAV transport with liquid from the first station. The UAV transport undocks from the first station and flies to the vicinity of a second station. The UAV transport docks with the second station and delivers at least a portion of the liquid to the second station. A UAV for use therewith and a method for maintaining a feed tray at the second station are provided.