Abstract: A ground anchor system for anchoring a post comprises a base plate, a housing extending above the base plate, an anchor extending below the base plate, the anchor comprising a tapered helix having a thread encircling a tube which tapers inwardly towards the lower end of the anchor, and a boring tip at the lower end of the anchor. The tapered helical thread of the anchor firmly engages with the ground into which it is threaded to provide a solid support to a post inserted in the housing. Helix taper and length, and thread taper and pitch may be selected to optimize retention and lateral support of a post in a particular ground type.

Abstract: A method and a device for assembling an air-craft wing incorporating at least two of the operations drilling, riveting and fitting of anchor nuts (20), where a robot (7) is mobile relative to the wing in a plane parallel to the wing and where the robot (7) is equipped with an arm (9) designed to accommodate a tool holder (15), where the tool holder (15) is primarily equipped with tools for performing a single work operation, whereby the robot is moved so that the robot arm (9) is positioned at the first work position on the aircraft wing unit, where the robot (7) carries out the first work operation at the said first work position, where the robot arm (9) is manoeuvred in the correct order to new work positions on the wing unit within a work area (10) reachable by the robot arm (9), and carries out the first work operation at these new work positions.