Autorotating aerial device, method of forming the autorotating aerial device and an autorotating aerial system

An autorotating aerial system, the system comprising:

• two or more autorotating aerial devices, each autorotating aerial device coupled together at a coupling hub and comprises:
• a housing member having disposed thereon an actuator and a controller configured to control the actuator;
• and
• a wing member coupled to the actuator, the wing member comprising a main wing portion and a flap portion adjustable with respect to the main wing portion, wherein the controller is configured to control the actuator to switch the autorotating aerial device between a diving mode of operation and an autorotating mode of operation based on adjusting an angle of attack of the flap portion, the angle of attack being with respect to a lateral axis along the main wing portion,
• wherein for said each autorotating aerial device, the actuator of the autorotating aerial device is configured to release the autorotating aerial device from the coupling hub in response to a trigger.

A method of forming an autorotating aerial device, the method comprising:

• providing a housing member having disposed thereon an actuator and a controller configured to control the actuator;
• providing a wing member comprising a main wing portion and a flap portion adjustable with respect to the main wing portion, wherein the main wing portion comprises a leading edge and a trailing edge, and the flap portion is arranged along at least substantially an entire length of the trailing edge of the main wing portion;
• and
• coupling the wing member to the actuator, wherein the controller is configured to control the actuator to switch the autorotating aerial device between a diving mode of operation and an autorotating mode of operation based on adjusting an angle of attack of the flap portion, by adjusting the angle of attack of the flap portion beyond a critical angle of attack for the diving mode of operation and adjusting the angle of attack of the flap portion below the critical angle of attack for the autorotating mode of operation, the angle of attack being with respect to a lateral axis along the main wing portion, and
• wherein the controller is further configured to control the actuator to adjust the angle of attack of the flap portion to an angle in a range of about 70° to about 90° for a positive angle with respect to the lateral axis along the main wing portion or in a range of about −60° to about −90° for a negative angle with respect to the lateral axis along the main wing portion to initiate the diving mode of operation of the autorotating aerial device.