A motor assembly that includes a motor having a motor casing, a rotatable shaft extending from said motor casing to a shaft length and a hub coupled to said rotatable shaft, the hub having a circumferential skid surface disposed immediately proximal to the motor casing and having a channel configured to seat a propeller, when a propeller is present, wherein a bending moment applied to the shaft through the hub results in the circumferential skid surface contacting said motor casing.

A remote-control aircraft comprises an aircraft body with a mounting platform provided with a connecting part and first magnet(s), and the connecting part is perforated with a connecting hole; and comprises an aircraft wing with an inserting part and second magnet(s) on its underside close to the aircraft body, the inserting part is rotationally inserted into the connecting hole, the second magnet and the first magnet are connected by magnetic attraction, and the aircraft wing is in close contact with the mounting platform. Thus, the aircraft wing and body can be quickly assembled and disassembled and can be carried conveniently. While the aircraft wing collides with an obstacle, it can be rotated around the inserting part as the center, and the impact force can be unloaded by rotating to prevent the aircraft wing from being damaged and prevent the aircraft wing from being separated from the aircraft body.

An unmanned aerial vehicle (UAV) includes a propeller, a driving device, and an elastic abutting member sleeve. The propeller includes a blade base, a blade mounted on the blade base, and a first installation foolproof member disposed on the blade base. The driving device includes a main body, a driving shaft rotatable relative to the main body, a locking member disposed on the main body, and a second installation foolproof member disposed on the locking member. The driving device is coupled with the propeller. The elastic abutting member is coupled with the driving shaft and disposed between the main body and the blade base and abuts against the main body and the blade base.

A kit and assembly for mapping out steps in a build process for constructing a model replica including a mapping key containing a plurality of symbols corresponding to different fabrication operations associated with the build process. One or more template boards are provided, each containing one or more replica parts and having a sub-arrangement or scheme of symbols drawn from the mapping key for providing a subset build step. Assembly of the foam board replica can be expedited, with or without reference to separate instructional videos which can be provided for any specific replica kit.

The present invention relates to a book comprising a first outer cover having a substantially planar body defining a first aperture extending therethrough; a second outer cover having a substantially planar body defining a second aperture extending therethrough; and at least one inner element located between the first and second outer covers, the or each inner element having a substantially planar body defining an inner element aperture extending therethrough; wherein at least a portion of the first and second apertures and the or each inner element aperture are aligned with one another to define a receiving aperture extending through the book.

A motor assembly that includes a motor having a motor casing, a rotatable shaft extending from said motor casing to a shaft length and a hub coupled to said rotatable shaft, the hub having a circumferential skid surface disposed immediately proximal to the motor casing and having a channel configured to seat a propeller, when a propeller is present, wherein a bending moment applied to the shaft through the hub results in the circumferential skid surface contacting said motor casing.

The present disclosure provides a collision judgment method and apparatus. The method includes: determining, by a moving device, according to acceleration data collected by an acceleration sensor, that the moving device collides; sending collision information to the corresponding control device, including at least a moving device identifier and a collision time; sending, by the corresponding control device, the collision information to a collision judgment device; detecting, by the collision judgement device, whether at least two collision information sent by the at least two control devices is received within a predetermined time interval; when the at least two collision information is received within the predetermined time interval, and a difference between collision times carried in the at least two collision information is less than a preset threshold, determining that moving devices corresponding to moving device identifiers carried in the at least two collision information collided with one other.

The parameter setting device has a parameter data input unit and a setting control unit which stores parameter data in an empty channel in the steering signal received from the transmitter and sends it to the transmitter. The parameter setting device and the transmitter are connected, and the parameter data is input to the parameter setting device. The parameter setting device stores the parameter data in the empty channel of the steering signal received from the transmitter and sends it back to the transmitter. The transmitter sends its steering signal to the body to be steered. The parameter data of the specific operation object mounted on the object to be steered can be reliably changed while continuing the operation of the operation object mounted on the object to be steered.

An aircraft control system and control method are disclosed. The system comprises a remote control apparatus with a first control rod and a flight controller associated with an aircraft. The first control rod is configured to move in a first movement direction to control a motion of the aircraft in a first motion direction when an external force is applied on the first control rod and after a withdrawal of the external force, the first control rod returns to a preset position. The remote control apparatus operates to generate one or more control signals corresponding to the withdrawal of the external force. The flight controller controls the aircraft to maintain a flight state based on said control signals and one or more state signals, which are generated based on a measurement of the flight state by a flight controller associated with the aircraft state measurement sensors carried by the aircraft.

A monitoring terminal includes a transceiver, a receiver, and a processor. The transceiver provides a two-way communication with an unmanned aerial vehicle (UAV) via a first communication link and is configured to receive feedback data and a feedback data indication from the UAV and transmit control data to the UAV. The receiver is configured to receive the control data and a control data indication from a controlling terminal via a second communication link. The second communication link does not interfere with the first communication link. The processor is configured to determine whether the feedback data and the control data are being simultaneously transmitted via the first communication link based on the feedback data indication and the control data indication.