A propeller-driven rocket has a body that is divided into multiple pieces. During the launch and climb, the body reaction to the torque of the propeller keeps the body panels pressed into their initial orientation. At the apex of flight, or a predetermined time from launch, the propeller reverses direction for short period of time. This reverses the forces on the body panels, causing them to release outward. The body panels are hinged such that they may form a rotor for an auto-rotating, controlled descent.

This invention is a tubular shaped flying toy comprised of a polypropylene (foam) main cylindrical body with a heavy plastic ring supported front end. The main foam body is held in place to the plastic ring support with the help of rubber bracelet bands that stretch around the outside of the front end of the toy where the foam body stretches onto the hard plastic ring. The toy is thrown with a baseball type throwing motion, and provides a graceful, smooth flight.

A boomerang includes a main housing, a bracket, a paddle, a main control board, a power supply, a motor and a lamp strip; the housing is spherical with an accommodation space therein and multiple holes thereon, the multiple holes are communicated with the accommodation space. The bracket is mounted in the accommodation space, the bracket provides a shaft, a central of the shaft coincides with a center of the main housing. The paddle is located in the accommodating space and rotatably disposed on the shaft; the main control board, the power supply, the motor and the lamp strip are mounted on the bracket; the power supply, the motor and the lamp strip are electrically connected to the main control board, the motor drives the paddle to rotate.

A boomerang includes a main housing, a bracket, a paddle, a main control board, a power supply, a motor and a lamp strip; the housing is spherical with an accommodation space therein and multiple holes thereon, the multiple holes are communicated with the accommodation space. The bracket is mounted in the accommodation space, the bracket provides a shaft, a central of the shaft coincides with a center of the main housing. The paddle is located in the accommodating space and rotatably disposed on the shaft; the main control board, the power supply, the motor and the lamp strip are mounted on the bracket; the power supply, the motor and the lamp strip are electrically connected to the main control board, the motor drives the paddle to rotate.

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.

A modular wing, adapted to be used on a flying device such as a toy airplane, drone, or other small fixed wing flying device, or form a part of a wind turbine or any other apparatus that requires a wing or blade, that is compatible with all block-based toy systems such as LEGO®, DECOOL® or KAZI®. The modular wing is comprised of a series of modular aerodynamic surfaces that may be suitable for manufacture by a low-cost method such as molding or additive manufacturing such as 3D printing, typically but not necessarily from plastic, to form wing sub elements which, when assembled together, form a wing or blade such as an airplane wing or turbine blade. The modular wing may comprise cambered or symmetric wing shapes. The modular wing may be used in a static display model fully flying aerodynamic aircraft, sailing hydrodynamic boat, or aerodynamic functioning turbine.

A modular wing, adapted to be used on a flying device such as a toy airplane, drone, or other small fixed wing flying device, or form a part of a wind turbine or any other apparatus that requires a wing or blade, that is compatible with all block-based toy systems such as LEGO®, DECOOL® or KAZI®. The modular wing is comprised of a series of modular aerodynamic surfaces that may be suitable for manufacture by a low-cost method such as molding or additive manufacturing such as 3D printing, typically but not necessarily from plastic, to form wing sub elements which, when assembled together, form a wing or blade such as an airplane wing or turbine blade. The modular wing may comprise cambered or symmetric wing shapes. The modular wing may be used in a static display model fully flying aerodynamic aircraft, sailing hydrodynamic boat, or aerodynamic functioning turbine.

A toy comprising a rotor (20), an actuator mechanism (33), and a launch device (41), wherein the rotor comprises an actuator mechanism (33), and wherein the one toy building element comprises a launch device (41) in the form of a cavity, wherein the cavity is configured for receiving the actuator mechanism (33), and wherein the actuator means (50) can be inserted into a through-going slit opening (42) to cooperate with the actuator mechanism to the effect that a momentum can be transferred from the actuator means (50) to the rotor (20), whereby the rotor can be rotated and launched from the launch device, and wherein the toy comprises at least two toy building elements, of which the one toy building element (40) comprises the launch device (41), and wherein the toy building element (40) is provided with one or more of first types of coupling means (43) and the second toy building element is provided with one or more of second types of coupling means that are geometrically configured complementarily relative to the first type of coupling means, whereby the first and second types of coupling means can be interconnected to form a spatial structure comprising the launch device (41).

A toy comprising a rotor (20), an actuator mechanism (33), and a launch device (41), wherein the rotor comprises an actuator mechanism (33), and wherein the one toy building element comprises a launch device (41) in the form of a cavity, wherein the cavity is configured for receiving the actuator mechanism (33), and wherein the actuator means (50) can be inserted into a through-going slit opening (42) to cooperate with the actuator mechanism to the effect that a momentum can be transferred from the actuator means (50) to the rotor (20), whereby the rotor can be rotated and launched from the launch device, and wherein the toy comprises at least two toy building elements, of which the one toy building element (40) comprises the launch device (41), and wherein the toy building element (40) is provided with one or more of first types of coupling means (43) and the second toy building element is provided with one or more of second types of coupling means that are geometrically configured complementarily relative to the first type of coupling means, whereby the first and second types of coupling means can be interconnected to form a spatial structure comprising the launch device (41).