A drone-assisted ballistic system is provided. The ballistic system may include a plurality of mobile devices, a ballistic computer, and a data interface. Each mobile device may be operable to gather wind data along or adjacent to a flight path of a projectile to a target, each mobile device measuring at least wind speed and wind direction. The ballistic system may include at least one static device operable to gather wind data at or near a launch or firing position. The ballistic computer may be in data communication with the plurality of mobile devices to receive the wind data. The ballistic computer may be configured to calculate a wind compensation value for the projectile based on the wind data. The data interface may be in data communication with the ballistic computer to output the wind compensation value to a user in real-time.

A propulsion unit includes a motor rotor that spins about a central rotational axis, propeller blades each having a proximal base and a distal tip, and pivot mounts each coupling the proximal base of a corresponding one of the propeller blades to the motor rotor. The propeller blades each freely pivot at the proximal base about a corresponding offset pivoting axis that is substantially parallel to but offset from the central rotational axis of the motor rotor.

A propulsion unit includes a motor rotor, a clip-in base mount, a clip-in rotor cap, propeller mounts, and propeller blades. The motor rotor spins about a central rotational axis. The clip-in base mount is disposed on the motor rotor. The clip-in rotor cap is shaped to mate with and detachably clip into the clip-in base mount. The propeller mounts are attached to the clip-in rotor cap. The propeller blades each have a proximal base and a distal tip. The proximal base of each propeller blade mounts to a corresponding one of the propeller mounts.

An unmanned aerial vehicle includes a plurality of propellers and an airframe. The airframe includes a body having a hollow portion, and a plurality of through holes connected to the hollow portion and formed on an outer peripheral surface of the body. The airframe also includes a plurality of arms supporting the plurality of propellers, and each arm of the plurality of arms includes a base end portion disposed at a body side in a longitudinal direction of the respective arm. The base end portion is inserted in a corresponding through hole of the plurality of through holes and supported by the body. Each arm of the plurality of arms is configured to be stored in the hollow portion of the body by being retracted into the body via the through hole, and expanded out of the body by being pulled out of the body via the through hole.

Vehicles such as unmanned air vehicles that are capable of movement from an open, flight configuration to an enclosed configuration in which all major flight components can be protected by an outer shell are disclosed. In the enclosed configuration, the vehicles can take on standard geometric shapes such as a rectangular prism, sphere, cylinder, or another shape, so as to not be recognizable as an unmanned air vehicle. Embodiments of vehicles can also include interchangeable and/or wireless motor arms, motor arms which are electrically connected to the remainder of the vehicle only when in an open configuration, remote controllers removably attached to the remainder of the vehicle, and clip or other attachment mechanisms for attachment to objects such as backpacks.

Equipment and methods that combine the use of wave powered vehicles and unmanned aerial vehicles (UAVs or drones). A UAV can be launched from a wave-powered vehicle, observe another vessel, and report the results of its observation to the wave-powered vehicle, and the wave-powered vehicle can report the results of the observation to a remote location. The UAV can land on water and can then be recovered by the wave-powered vehicle.

Systems and methods are provided for autonomous robotic surgery which is preferably integrated with autonomous-assisted intraoperative real-time single modality and/or multi-modality fusion imaging/electrophysiological diagnostics. The robotic surgery systems and methods can be integrated with autonomous-assisted intraoperative body/limb positioning, and integrated with autonomous-assisted land and unmanned aerial vehicular patient transportation.

An aircraft and an outer shell therefor. The aircraft includes an outer shell; and main body components, accommodated in the outer shell. The outer shell includes: an inner cavity, the inner cavity being provided with a space for at least accommodating the main body components of the aircraft; an outer surface, the outer surface enclosing the inner cavity.

An unmanned aerial vehicle is provided in the present disclosure. The unmanned aerial vehicle includes an aircraft body, first arm assemblies disposed at a front of the aircraft body, and second arm assemblies disposed at a rear of the aircraft body. The first arm assemblies include first arms, and the second arm assemblies include second arms. The first arms and the second arms are rotatably connected to the aircraft body respectively, to enable each of the first arms and the second arms to be at an unfolded state or a folded state. When the first arm assemblies and the second arm assemblies are at the folded state, the first arms and the second arms are arranged side by side.

A propeller assembly includes propeller blades that self-fold when not in use, which reduces the overall footprint of the propeller assembly and enables efficient storage. During flying conditions, the propeller blades unfold and extend to a flight configuration that enables the generation of lift on the propeller blades and consequently to an attached aerial vehicle. In various embodiments, the transitioning of the propeller blades between a flight and folded configuration may be enabled by torsion springs coupled to each propeller blade. For example, the torsion springs cause each propeller blade to rotate and self-fold when no external forces are applied. Alternatively, during flying conditions, centrifugal forces that arise as the propeller assembly rotates counteract the torsion springs, enabling each propeller blade to achieve an extended flight configuration. Therefore, the propeller blades of the propeller assembly are optimally oriented without the need for human intervention.