A reverse force mechanism includes a main shaft, a main link, a movable shaft, an actuating link, a slider, an actuating shaft, a spring link, and a spring shaft. A reverse force spring is attached to the spring link. The spring shaft is fixed to a position a dimension away in a direction parallel to the slider from a base point on an extension of a line segment from the main shaft to the movable shaft when in an inserted state in which the movable shaft is farthest from a line connecting the main shaft and the actuating shaft. The dimension is set such that a resultant operating force is constant at a non-zero value. An angle between the actuating link and the slider is set to be variable within a range of 25 to 85 during operation.

There is described an aircraft configured to be able to hover, comprising a fuselage; and a support element adapted to support a load, made of elastically deformable material and constrained to said fuselage; the support element being movable in an operating position in which it is arranged at least partially outside said fuselage and supports said load; the aircraft comprises a sock surrounding the support element arranged in said operating position; the sock is configured to contain the elastic return of the support element, in case the support element arranged in said operating position is sheared off.