Systems and methods include UAVs that serve to assist carrier personnel by reducing the physical demands of the transportation and delivery process. A UAV generally includes a UAV chassis including an upper portion, a plurality of propulsion members configured to provide lift to the UAV chassis, and a parcel carrier configured for being selectively coupled to and removed from the UAV chassis. UAV support mechanisms are utilized to load and unload parcel carriers to the UAV chassis, and the UAV lands on and takes off from the UAV support mechanism to deliver parcels to a serviceable point. The UAV includes computing entities that interface with different systems and computing entities to send and receive various types of information.

Airborne unmanned autonomous vehicles (UAVs) may be used to hover over swimming pools or spas and dispense chemicals (or other materials or devices) directly thereinto. UAVs alternatively or additionally may include sensors designed to identify certain characteristics of pools or spas or of the water therein. The UAVs further may hover over, or land on, pool pads or other areas adjacent or near a pool or spa to deliver or receive parts or other objects.

A rotor system for aerial vehicles where two or more rotor systems are used in a coaxial or tandem arrangement on the aerial vehicle.

A linear thruster aircraft includes: an airframe, including an elongated mounting nacelle and a main body; an aircraft control unit with a processor, a non-transitory memory, and an input/output component; and at least one linear thruster arrangement with at least four thrusters mounted along at least one elongated axis of the elongated mounting nacelle, such that the thrusters are configured to provide lift, pitch, roll, and yaw movement. Optionally, the linear thruster arrangement can include alternating lateral and vertical offsets of the thrusters from the elongated axis, and pairs of thrusters can be vertically overlapping.

A linear thruster aircraft includes: an airframe, including an elongated mounting nacelle and a main body; an aircraft control unit with a processor, a non-transitory memory, and an input/output component; and at least one linear thruster arrangement with at least four thrusters mounted along at least one elongated axis of the elongated mounting nacelle, such that the thrusters are configured to provide lift, pitch, roll, and yaw movement. Optionally, the linear thruster arrangement can include alternating lateral and vertical offsets of the thrusters from the elongated axis, and pairs of thrusters can be vertically overlapping.

A method including powering on a controller and an unmanned aerial vehicle (UAV). Setting a clock time on the controller to an initial time. Connecting the UAV to a global positioning satellite (GPS). Linking the controller and the UAV and comparing the initial time to a time from the GPS. Setting the clock time of the controller and the UAV so that the controller and the UAV have a same time.

The present invention discloses an unmanned aerial vehicle, including: a fuselage; a battery accommodation cavity, disposed on the fuselage; a battery pack, including at least two battery blocks and mounted inside the battery accommodation cavity; a battery circuit board, electrically connected to the battery blocks in the battery pack; and a functional module, electrically connected to the battery circuit board, the battery blocks in the battery pack supplying power to the functional module via the battery circuit board at the same time. By using the solution of the present invention, endurance of the unmanned aerial vehicle is increased.

A method for positioning a target in a building based on the assistance of two aircraft includes the following steps: allowing two aircraft with respective direction-finding devices to fly around a building, and sending a signal by a positioning tag carried by an indoor target; measuring projections of directions of the signal source on a horizontal plane respectively by the two aircraft, and indicating a position of the indoor target on the horizontal plane by an intersection of the two projections; and according to a difference between barometric pressures of the indoor target and the aircraft, obtaining an altitude of the target to further obtain position coordinates of the target. The method avoids deploying an indoor positioning base station, and improves the positioning accuracy, stability and anti-interference performance.

An agricultural method includes providing a positive air pressure chamber to prevent outside contaminants from entering the chamber; growing crops in a plurality of cells in the chamber, each cell having multi-grow benches or levels, each cell further having connectors to vertical hoists for vertical movements in the chamber; maintaining pre-set temperature, humidity, carbon dioxide, watering and lighting levels to achieve predetermined plant growth; using motorized transport rails to deliver benches for operations including seeding, harvesting, grow media recovery, and bench wash; dispensing seeds in the cell with a mechanical seeder coupled to the transport rails; growing the crops with computer controlled nutrients, light and air level; and harvesting the crops and delivering the harvested crop at a selected outlet of the chamber.

A drone propeller of the present invention includes a plurality of blades and a rotary shaft, wherein the blades comprise a rotation retaining unit connected to the rotary shaft side, a separation and detachment unit that is on the outer side of the blades and is to be separated when damaged, and a breakage inducing unit which connects the rotation retaining unit and the separation and detachment unit and is damaged during a collision.