Abstract: A system that includes a ground unit, an aerial unit and a connecting element that is arranged to connect the ground unit to the aerial unit; wherein the ground unit comprises a connecting element manipulator that is arranged to alter an effective length of the connecting element; wherein the effective length of the connecting element defines a distance between the ground unit and the aerial unit; wherein at least one out of the ground unit and the aerial unit comprises a controller; wherein the controller is configured to determine the manner in which the aerial unit operates and is further configured to assist in a controlling of an aerial monitoring device that differs from the aerial unit.

Abstract: A system that includes a ground unit that includes: a takeoff and landing platform; a landing and takeoff assisting module; and a housing. The takeoff and landing platform is arranged to hold and support an aerial unit during a first part of a landing process of the aerial unit and a first part of takeoff process of the aerial unit. The aerial unit is coupled to the ground unit via a connecting element. The effective length of the connecting element increases during the takeoff process and decreases during the landing process. The landing and takeoff assisting module is coupled to the takeoff and landing platform and is arranged to (a) lower the takeoff and landing platform into the housing during a second part of the landing process and (b) elevate the takeoff and landing platform during a second part of the takeoff process.

Abstract: An aerial unit, a method and a system are provide, the system includes a ground unit; an aerial unit and a connecting element arranged to connect the ground unit to the aerial unit. The ground unit may include a connecting element manipulator, a ground unit controller for controlling the connecting element manipulator; and a ground unit location sensor arranged to generate ground unit location information indicative of a location of the ground unit. The wherein the aerial unit may include a first propeller, a frame, a first propeller motor, at least one steering element; and an aerial unit location sensor arranged to generate aerial unit location information indicative of a location of the aerial unit.

Abstract: An aerial unit includes a connecting element arranged to connect a ground unit to the aerial unit. The ground unit may include a connecting element manipulator, for altering an effective length of the connecting element and a ground unit controller for controlling the connecting element manipulator. A positioning unit is arranged to image the aerial unit and to generate metadata about a location of the aerial unit. An interfacing module is provided for coupling a payload to the aerial unit. At least one of the ground unit and the aerial unit may include a controller that is arranged to control, at least in response to the metadata, at least one of a first propeller motor and at least one steering element to affect at least one of the location of the aerial unit and the orientation of the aerial unit.

Abstract: An aerial unit, a method and a system are provide, the system includes a ground unit; an aerial unit and a connecting element arranged to connect the ground unit to the aerial unit. The ground unit may include a connecting element manipulator, a ground unit controller for controlling the connecting element manipulator; and a ground unit location sensor arranged to generate ground unit location information indicative of a location of the ground unit. The wherein the aerial unit may include a first propeller, a frame, a first propeller motor, at least one steering element; and an aerial unit location sensor arranged to generate aerial unit location information indicative of a location of the aerial unit.

Abstract: A system that includes a ground unit that includes: a takeoff and landing platform; a landing and takeoff assisting module; and a housing. The takeoff and landing platform is arranged to hold and support an aerial unit during a first part of a landing process of the aerial unit and a first part of takeoff process of the aerial unit. The aerial unit is coupled to the ground unit via a connecting element. The effective length of the connecting element increases during the takeoff process and decreases during the landing process. The landing and takeoff assisting module is coupled to the takeoff and landing platform and is arranged to (a) lower the takeoff and landing platform into the housing during a second part of the landing process and (b) elevate the takeoff and landing platform during a second part of the takeoff process.

Abstract: An aerial unit includes a connecting element arranged to connect a ground unit to the aerial unit. The ground unit may include a connecting element manipulator, for altering an effective length of the connecting element and a ground unit controller for controlling the connecting element manipulator. A positioning unit is arranged to image the aerial unit and to generate metadata about a location of the aerial unit. An interfacing module is provided for coupling a payload to the aerial unit. At least one of the ground unit and the aerial unit may include a controller that is arranged to control, at least in response to the metadata, at least one of a first propeller motor and at least one steering element to affect at least one of the location of the aerial unit and the orientation of the aerial unit.

Abstract: An aerial unit that includes a first propeller; a second propeller that is spaced apart from the first propeller and is below the first propeller; a propelling module that is configured to rotate the first propeller and the second propeller about a first axis; an apertured duct that comprises a first duct portion and a second duct portion. The first duct portion surrounds the first propeller. The second duct portion surrounds the second propeller. The apertured duct defines at least one aperture at an intermediate area that is positioned below the first propeller and is above the second propeller. The aggregate size of the at least one aperture is at least fifty percent of a size of the intermediate area; a frame; and at least one steering element; an interfacing module arranged to be connected to a connecting element that couples the aerial unit to a ground unit. The propelling module and the duct are connected to the frame.