Methods, devices, and systems of various embodiments are disclosed for operating a propeller assembly for use with a UAV. Various embodiments include a propeller assembly including a pivotal arm, a propeller mounted on the pivotal arm, and pivotal leg coupled to the pivotal arm. The pivotal leg may be folded into the pivotal arm and the pivotal arm may be folded into a body of the UAV. A processor may be coupled to the propeller assembly and configured with processor-executable instructions to perform operations of the propeller assembly.

A method for controlling a UAV includes: receiving a takeoff control command, where the takeoff control command is used to control the UAV to take off; in response to the takeoff control command, when the UAV is not equipped with the safety protection device, prohibiting the UAV from taking off, and/or when the UAV is equipped with the safety protection device, controlling the UAV to take off. This method enhances the safety and usability of the UAV.

A method for controlling a UAV includes: receiving a takeoff control command, where the takeoff control command is used to control the UAV to take off; in response to the takeoff control command, when the UAV is not equipped with the safety protection device, prohibiting the UAV from taking off, and/or when the UAV is equipped with the safety protection device, controlling the UAV to take off. This method enhances the safety and usability of the UAV.

A fact checking system utilizes social networking information and analyzes and determines the factual accuracy of information and/or characterizes the information by comparing the information with source information. The social networking fact checking system automatically monitors information, processes the information, fact checks the information and/or provides a status of the information, including automatically modifying a web page to include the fact check results. The fact checking system is able to be implemented utilizing a drone device. The drone device is able to be implemented in conjunction with a security system.

A system comprising an aerial vehicle or an unmanned aerial vehicle (UAV) configured to control pitch, roll, and/or yaw via airfoils having resiliently mounted trailing edges opposed by fuselage-house deflecting actuator horns. Embodiments include one or more rudder elements which may be rotatably attached and actuated by an effector member disposed within the fuselage housing and extendible in part to engage the one or more rudder elements.

The present disclosure discloses a trans-media unmanned aerial vehicle device and a control method thereof. The trans-media unmanned aerial vehicle device includes a housing, and a piston which is arranged in the housing and is capable of moving in a reciprocating manner in the housing; one end of the housing is provided with an opening; several flying wings are uniformly arranged in a circumferential direction of the piston; the flying wings are rotatably connected to a side of the piston facing the opening and are spread or retracted like an umbrella; and under the pushing of the piston, the flying wings can be spread to the outside of the housing and retracted back into the housing.

The present disclosure discloses a trans-media unmanned aerial vehicle device and a control method thereof. The trans-media unmanned aerial vehicle device includes a housing, and a piston which is arranged in the housing and is capable of moving in a reciprocating manner in the housing; one end of the housing is provided with an opening; several flying wings are uniformly arranged in a circumferential direction of the piston; the flying wings are rotatably connected to a side of the piston facing the opening and are spread or retracted like an umbrella; and under the pushing of the piston, the flying wings can be spread to the outside of the housing and retracted back into the housing.

Systems, methods, and devices provide a vehicle, such as an aircraft, with rotors configured to function as a tri-copter for vertical takeoff and landing (VTOL) and a fixed-wing vehicle for forward flight. One rotor may be mounted at a front of the vehicle fuselage on a hinged structure controlled by an actuator to tilt from horizontal to vertical positions. Two additional rotors may be mounted on the horizontal surface of the vehicle tail structure with rotor axes oriented vertically to the fuselage. For forward flight of the vehicle, the front rotor may be rotated down such that the front rotor axis may be oriented horizontally along the fuselage and the front rotor may act as a propeller. For vertical flight, the front rotor may be rotated up such that the front rotor axis may be oriented vertically to the fuselage, while the tail rotors may be activated.

An unmanned aerial vehicle includes multiple rotor arms; a rotor disposed at an end of each of the multiple rotor arms; and an adjustment component configured to enable a first rotor arm to move relative to a second rotor arm.

A launcher for unmanned aerial vehicles (UAV), the launcher having a foldable UAV stowed within said launcher, the launcher includes, a launch tube configured as a UAV launcher and a UAV carrying case. The launcher further includes a pneumatic booster connected to said UAV for accelerating said UAV during launching phase. The launcher further includes a separation mechanism operated to permits separation of the booster from the UAV when the UAV leaves the launcher tube and to transfer the kinetic energy that is created from the pneumatic booster to the UAV in the launching phase. The UAV is propelled off of the launch tube by the booster that transmits thrust in the launch tube to the space below said booster. The UAV which is connected to the booster by the separation mechanism is pushed out of the launcher tube body and leaves the launch tube, the booster is separated from the UAV by the separation mechanism and the UAV is automatically deployed. The UAV propellers are activated to propel the UAV and driven the UAV.