Aerial vehicle hold-down harpoon

An aerial vehicle harpoon device for securing an aerial vehicle (31, 55) to a grid (9) of a landing site, the aerial vehicle (31, 55) comprises an undercarriage (11) having a supporting surface (13) for supporting the aerial vehicle (31, 55) when being in contact with the ground (15), the harpoon device (1) further comprises a securing element (4) arranged adjacent the supporting surface (13) for said securing of the aerial vehicle, wherein the harpoon device (1) further comprises a resilient actuating device (23) which is adapted to extend the securing element (4) beyond the supporting surface (13) in an unloaded state, when the aerial vehicle has landed and the harpoon device (1) is engaged to the grid (9), and which resilient actuating device (23) in a loaded state is compressed by the weight of the aerial vehicle (31, 55) when contacting the ground (15) so that the securing element (4) retracts and the supporting surface (13) contacts the ground (15).