A coaxial double layer parachute includes an inner inflatable body and an outer canopy which are located along a central axis. Since the inner inflatable body is filled with helium to generate a first buoyance, the inner inflatable body can be obviously lifted to a certain height. When a payload connected to the inner inflatable body and the outer canopy with parachute cords falls, the ambient air flows will enter the inflation space through the annular air inlets to produce a second buoyance, which makes the outer canopy open completely. Hence, a secure descending task from even a very low height can be fulfilled if the coaxial double layer parachute can employed. Apparently, the coaxial double layer parachute can be mainly applied to fire and earthquake rescue actions in the cities when low height deployments, risk-free parachuting, and less complicated manual operation are required.

A high-rise building escape apparatus enables user to quickly exit a high-rise building in the event of an emergency. It mainly includes a damper which withstands impact of termination of descent and decreases terminal velocity due to its mushroomlike shape, a compartment, side and bottom nets, a parachute, an air source system, hoses, rotatable and fix frames, and a safety belt. The apparatus is operated following the procedure below. A user sets up the fix frame and rotatable frame attaching the dropping parts on the sill of a window or on the top of a balcony, makes the rotatable frame swing to the outside, opens the dropping part pack, fills the high pressure air to the airbags simultaneously through a number of internal hoses and an external hose, and disconnects the hoses. The user then moves from the inside of the building to the compartment in the middle of the damper through the rotatable frame with hands grabbing it, reaches the bottom portion of the compartment, fastens the safety belt, and releases the dropping parts. As a result, the user will move down with the damper, the parachute will be extended, released, and deployed, and the rotatable frame will rotate back. As soon as the user reaches the ground, the user will unbuckle the safety belt, get out of the damper, and release the high pressure air.

An airframe is provided that can be flown under the control of an operator or an automated sensor and feedback system. The airframe can be any of a variety of known configurations with multiple rotors, fixed or retractable wings, puller or pusher propellers, or jet engines. The airframe includes at least one arm that is used to intercept and disable another airborne vehicle. In some configurations, the arm is fixed and can include fingers at its outer end. In other configurations, the arm is movable from a closed condition to an open condition. A wire or net is connected between the arm and a portion of the airframe so that the wire or net is spread open when the arm is deployed to the open condition. The wire or net are configured to disable or capture a target such as another aerial vehicle.

An airframe is provided that can be flown under the control of an operator or an automated sensor and feedback system. The airframe can be any of a variety of known configurations with multiple rotors, fixed or retractable wings, puller or pusher propellers, or jet engines. The airframe includes at least one arm that is used to intercept and disable another airborne vehicle. In some configurations, the arm is fixed and can include fingers at its outer end. In other configurations, the arm is movable from a closed condition to an open condition. A wire or net is connected between the arm and a portion of the airframe so that the wire or net is spread open when the arm is deployed to the open condition. The wire or net are configured to disable or capture a target such as another aerial vehicle.

In one possible embodiment, a system capable of a self-propagating data link includes an unmanned vehicle having a data link transceiver and at least one deployable data link transceiver. The unmanned vehicle having a deployment means for deploying the at least one deployable data link transceiver.

In one possible embodiment, a system capable of a self-propagating data link includes an unmanned vehicle having a data link transceiver and at least one deployable data link transceiver. The unmanned vehicle having a deployment means for deploying the at least one deployable data link transceiver.

In one possible embodiment, a system capable of a self-propagating data link includes an unmanned vehicle having a data link transceiver and at least one deployable data link transceiver. The unmanned vehicle having a deployment means for deploying the at least one deployable data link transceiver.

In one possible embodiment, a system capable of a self-propagating data link includes an unmanned vehicle having a data link transceiver and at least one deployable data link transceiver. The unmanned vehicle having a deployment means for deploying the at least one deployable data link transceiver.

A parachute device is provided with a bag containing a main parachute and a reserve parachute and with a propulsion assembly having a frame to which two arms are coupled; the two arms can be opened laterally by operating a control and support respective power units, which can be started by operating a further control.

A parachute device is provided with a bag containing a main parachute and a reserve parachute and with a propulsion assembly having a frame to which two arms are coupled; the two arms can be opened laterally by operating a control and support respective power units, which can be started by operating a further control.