Abstract: An unmanned aircraft configured to fall or crash in a controlled and safe manner. The unmanned aircraft includes a drive system to thrust the unmanned aircraft during a flight, and a reverse thrust system to reverse thrust the unmanned aircraft during a landing. The unmanned aircraft further includes a controller operationally coupled to the reverse thrust system, and a detector to detect and notify to the controller that the unmanned aircraft is in an uncontrolled situation during the flight. The controller is adapted to activate the reverse thrust system in order to reverse thrust the unmanned aircraft in-flight upon notification from the detector that the unmanned aircraft is in an uncontrolled situation.

Abstract: An unmanned aircraft comprises: a drive system to thrust the unmanned aircraft during a flight; a reverse thrust system to reverse thrust the unmanned aircraft during a landing; a controller operationally coupled to the reverse thrust system; and a detector to detect and notify to the controller that the unmanned aircraft is in an uncontrolled situation during the flight. The controller is then adapted to activate the reverse thrust system in order to reverse thrust the unmanned aircraft in-flight upon notification from the detector that the unmanned aircraft is in an uncontrolled situation.

Abstract: A single wing for an unmanned aircraft adapted for image acquisition, surveillance or other applications consists of a ribbed frame and a foam wherein the ribbed frame is integrated during molding for stiffness and strength. The foam has a container for holding the electric and/or electronic components. The foam constitutes the outer layer of the unmanned aircraft at impact side. The wing can be produced at low cost and low complexity in large volumes, increases the impact resistance and safety when used in civil areas, and is removable and disposable thereby enabling reuse of the electric and/or electronic components.

Abstract: A single wing for an unmanned aircraft adapted for image acquisition, surveillance or other applications consists of a ribbed frame and a foam wherein the ribbed frame is integrated during molding for stiffness and strength. The foam has a container for holding the electric and/or electronic components. The foam constitutes the outer layer of the unmanned aircraft at impact side. The wing can be produced at low cost and low complexity in large volumes, increases the impact resistance and safety when used in civil areas, and is removable and disposable thereby enabling reuse of the electric and/or electronic components.