An aircraft comprising a hydrogen-containing envelope, a water-collection system for collecting water from the envelope, an electrolyser to convert the water collected using the water-collection system into hydrogen, and a hydrogen-replenishment system for replenishing the envelope with hydrogen generated using the electrolyser. In one embodiment, generated hydrogen is also supplied to a hydrogen-fueled propulsion system for propulsion of the aircraft.

An air cushioned landing system for an air vehicle comprises an inflatable and deflatable skirt (113) in the form of a tube having inner (101) and outer (100) walls. The inner wall defines a central plenum (116) within the skirt, the skirt including gas pockets (130) arranged to stiffen one or more regions of at least one of the inner (101) and outer (100) sidewalls during deflation of the skirt. A gas pocket fan inflates the gas pockets prior to and during deflation of the skirt, wherein the gas pockets are constrained to move from a mutually spaced apart position when the skirt is inflated, to a mutually closely adjacent position when the skirt is fully deflated.

A hybrid aircraft of the unmanned type configured for joint and optimized use of aerostatic and aerodynamic force has an inflatable body having an outer shell and a load-bearing structure inside the outer shell, the inflatable body being adapted to assume a closed wing operating configuration.

A hybrid airship-aerostat includes a hull, a motor, a fin, a controller, and a bridle system. The motor is coupled to the hull and is configured to rotate between a thrust configuration and a lift configuration. The motor is configured to generate a lift force, a thrust force, or a combination thereof. The fin is coupled to a tail of the hull and is configured to provide directional control of the hull. The controller is configured to operate the motor and the fin to pilot the hull. The bridle system is configured to removably couple to a first end of a tether.

An unmanned hybrid airship for delivering packages, featuring: a forward cargo bay counterbalanced by a moveable counterweight; and a gripping mechanism for engaging unconventional mooring structures such as balcony rails and window sills. Other embodiments are described.

A hybrid stratospheric airship for the combined and optimized use of aerostatic and aerodynamic force, including: an inflatable central body; a first and second inflatable wing extending from the central body protruding laterally from two opposite sides of the central body, each wing having a portion proximal to the central body, an end portion distal from said central body, a leading edge, and a trailing edge; an outer shell having a main shell portion associated with the main body, and a first and a second side shell portion associated with each wing, respectively; at least one main spar extending transversely to the central body, which supports the first and second wing and crosses the central body, the at least one main spar a rectilinear spar interposed between the leading edge and the trailing edge of the first and second wings, and connected to the distal end portions of the wings.

Provided is a system for point to point wireless power transmission including: a plurality of autonomous and semi-autonomous unmanned systems configured as a mobile transmitting and/or receiving power station, through which unmanned systems can navigate, maneuver, beam ride, and recharge from point to point. Provided is a method of adapting unmanned systems to receive and transmit power point-to-point amongst themselves. The method includes controlling a swarm formed from a plurality of autonomous synchronized unmanned systems to form a larger transmitter and receiver for a mobile power station.

An unmanned aerial system (UAS) includes a lighter-than-air (LTA) airship configured for autonomous long-duration flight; a hybrid propulsion system including at least one hydrogen fuel cell and at least one solar photovoltaic (PV) module disposed upon an outer surface of the LTA airship; an electrolyzer configured to generate hydrogen gas from water using power from the at least one solar PV module; a hydrogen storage system operatively connected to the at least one hydrogen fuel cell and the electrolyzer; and an autonomous resource management system configured to dynamically allocate power between the at least one hydrogen fuel cell, the at least one solar PV module, and the electrolyzer.

Provided is a system for point to point wireless power transmission including: a plurality of autonomous and semi-autonomous unmanned systems configured as a mobile transmitting and/or receiving power station, through which unmanned systems can navigate, maneuver, beam ride, and recharge from point to point. Provided is a method of adapting unmanned systems to receive and transmit power point-to-point amongst themselves. The method includes controlling a swarm formed from a plurality of autonomous synchronized unmanned systems to form a larger transmitter and receiver for a mobile power station.

Unmanned and remotely controlled airship constituted from system of multirotor combined with inflatable envelope. The airship may be lifted/powered by a power system comprising three or more rotors. In some embodiments, the airship may be constructed using rods, connectors, the main system/control box and the rotors. The airship system may have a systemic symmetry for weight distribution and flight control and may be, for example, a symmetric ellipsoid envelope/blimp.