Abstract: An Unmanned Aerial Vehicle includes a body, a boom, a rotor, and a nozzle. The rotor is connected to the body and rotates about an axis of rotation. The axis of rotation of the rotor is disposed at a fixed locations relative to the body. The boom is connected to the body. The nozzle is disposed at a distal end of the boom and is configured to controllably apply a liquid to a surface disposed proximate to the nozzle. The rotor, boom, and nozzle are arranged such that the nozzle is disposed further away from the body than the axis of rotation of the rotor.

Abstract: A UAV includes a body and rotor coupled to the body. The UAV may include a boom connected to the body, and a nozzle connected to a distal end of the boom, wherein an operational configuration of the nozzle is responsive to a second control signal. The rotor, boom, and nozzle are arranged such that the nozzle is disposed further away from the body than the rotor. The UAV may further include a sensor disposed on either the body or the boom, wherein the sensor is configured to generate a detection signal associated with a distance between the sensor and a surface disposed proximate to the sensor.

Abstract: A UAV includes a body and rotor coupled to the body. The UAV may include a boom coupled to the body, and a nozzle coupled to a distal end of the boom, wherein an operational configuration of the nozzle is responsive to a second control signal. The rotor, boom, and nozzle are arranged such that the nozzle is disposed further away from the body than the rotor. The UAV may further include a sensor disposed on either the body or the boom, wherein the sensor is configured to generate a detection signal associated with a distance between the sensor and a surface disposed proximate to the sensor.