The present disclosure describes various systems, devices, and methods configured to retrieve a fixed-wing aircraft from free flight using a flexible capture member and a monopole assembly.

Methods and apparatus to guide an unmanned aerial vehicle for recovery thereof are disclosed. A disclosed example apparatus to recover an aircraft or a payload thereof includes a tether line, and markers supported by the tether line at different positions of the tether line, the markers to be detected by the aircraft, the aircraft to be guided to engage the tether line by determining positions of the markers and calculating a position of at least a portion of the tether line based on the determined position of the markers.

Methods and apparatus to recover unmanned aerial vehicles with kites are disclosed. A disclosed example apparatus includes a tether line to be supported by a kite at a distal end thereof, and a release to deploy and expand a parafoil from at least one of the tether line or the kite in response to the aircraft contacting the tether line.

Methods, apparatus, systems and articles of manufacture are disclosed. A disclosed example apparatus to recover an aircraft includes a mast extending from a base, a boom extending from the mast at a first end of the boom to a second end of the boom opposite the first end, a tether line extending between the mast to the base and guided by the boom, a portion of the tether line extending between the second end of the boom and the base, and a mount to operatively coupled the a kite to the tether line, the kite to support the tether line as the aircraft contacts the portion for recovery thereof.

Aerial launch and/or recovery for unmanned aircraft, and associated systems and methods are described. A representative system includes a first, carrier aircraft having an airframe, a propulsion system carried by the airframe and positioned to support the carrier aircraft in hover, and a capture line carried by the carrier aircraft and deployable to hang from the carrier aircraft. The capture line is sized to releasably engage with a capture device of a second, carried aircraft. The system further includes a retrieval device positioned to support the carried aircraft for detachment from the capture line.

The design of a novel digital controller for a motor driven aircraft arrestment system of the type used on aircraft carriers is described. The unique control and feedback design of the described controller has many advanced features, which provide many advantages over existing designs for controlling advanced arresting gear systems. Gain scheduling in engage/arrest controllers can be done based on estimated parameters such as speed, effective skew angle, and faults to allow optimized engage/arrest controllers, where the gain scheduling can be defined, discretely, for each “bin” as defined for a range of threshold values, or it can be defined, continuously, using interpolation and/or functions of speed and effective skew. Particularly, controller design gain values K.sub.ci and K.sub.fi are picked to shape control loop transfer functions and dampen resonances in the aircraft arrestment system.

Unmanned aerial vehicle (UAV) recovery is disclosed. An example apparatus to recover an unmanned aerial vehicle (UAV) includes a support rail to support a cable. The apparatus also includes a pivot arm to rotate about a pivot, where the cable is suspended between the support rail and the pivot arm, and where the pivot arm is rotated to a first orientation when the UAV contacts the cable and rotated to a second orientation when the UAV is brought to a stop. The apparatus also includes at least one of a friction device or a damper operatively coupled to the cable to resist motion of the cable during rotation of the pivot arm from the first orientation to the second orientation.

A device for catching and launching a guided UAV, the device comprises a supporting post, a horizontal shaft mounted on the post, and a lever is mounted on the horizontal shaft and can make a full revolution around a horizontal axis within a vertical plane, the lever is equipped with an engagement/disengagement device a means for interaction with the UAV catching device and an optical member, preferably arranged on the lever, for determining a location of the lever interaction means by an optical guidance system of the UAV. The lever comprises two coaxial portions, one is the engagement/disengagement device, and the second is a bar, wherein one end of the bar is coupled to the horizontal shaft, while another end thereof is connected to the engagement/disengagement device. The bar and the engagement/disengagement device are connected by a hinge that enables their fixation in a coaxial state and allows offset the axis of the engagement/disengagement device relative to the axis of the bar within a rotation plane of the lever. The horizontal shaft is equipped with a means for accumulating and/or dissipating the kinetic energy of the UAV, the lever is fixed on the shaft and can provide an elastic offset of the interaction means of the engagement/disengagement device within a plane perpendicular to the rotation plane of the lever, the interaction means configured to provide mutual locking/unlocking with the UAV catching device.

Systems and methods for capturing unmanned aircraft and controlling post-recovery motion of the aircraft are disclosed herein. An aircraft system in accordance with one embodiment of the technology, for example, includes a base assembly and an aircraft capture member attached to and extending from the base assembly. The aircraft capture member has a distal region positioned to intercept an unmanned aircraft in flight. The aircraft capture member comprises an elongated telescoping rod including a plurality of discrete segments having a telescoping arrangement relative to each other. The aircraft capture member is configured to elongate or pay out from a first initial length to a second extended length greater than the first length after an unmanned aircraft intercepts and engages the distal region of the aircraft capture member.

Various embodiments of the present disclosure provide a rotorcraft-assisted system and method for launching and retrieving a fixed-wing aircraft into and from free flight. The launch and retrieval system includes a modular multicopter, a storage and launch system, an anchor system, a flexible capture member, and an aircraft-landing structure. The multicopter is attachable to the fixed-wing aircraft to facilitate launching the fixed-wing aircraft into free, wing-borne flight. The storage and launch system is usable to store the multicopter (when disassembled) and to act as a launch mount for the fixed-wing aircraft by retaining the fixed-wing aircraft in a desired launch orientation. The anchor system is usable with the multicopter, the flexible capture member, and the aircraft-landing structure to retrieve the fixed-wing aircraft from free, wing-borne flight.