Patent ID: 8205840

Claim:
An elongated aerodynamic element, comprising an aircraft wing or a rotary wing blade, provided with an upper aerodynamic surface and a lower aerodynamic surface defining therebetween a leading edge and a trailing edge, said aerodynamic element being capable of being torsion-deformed along an axis directed at least approximately along the span of said aerodynamic element and including, connected to each other, a front longitudinal portion including said leading edge and a rear longitudinal portion including said trailing edge, with a torsion of said aerodynamic element being associated with a relative sliding of said longitudinal portions at least substantially parallel to said span, wherein: one of said upper or lower aerodynamic surfaces is continuous and provides a linking between said front and rear longitudinal portions; the other of said aerodynamic surfaces is partitioned, on the side of said leading edge, by a longitudinal slot directed at least approximately along said span and separating said front and rear longitudinal portions from each other, the slot defining edges along the front and rear longitudinal portions with one of the edges being part of one of said longitudinal portions whereas the other of said edges is part of the other longitudinal portion; and inside said aerodynamic element, are provided inner actuating means capable of causing a relative sliding between said edges defined by the slot.