Rotor craft and variable-negative-twist paddle thereof

The variable-negative-torsion paddle comprises a control assembly and a composite paddle body, the composite paddle body comprises a first paddle body and a second paddle body, the first paddle body is of a rigid structure, and the second paddle body comprises a deformation layer, a paddle grid and a flexible skin. When the driver pushes the rear edge of the blade root of the composite blade, the first blade or the second blade connected with the driver rotates around the main shaft, then the first blade and the second blade movably connected with the main shaft are driven to rotate, and the second blade comprises a deformation layer connected through a blade grid so that the second blade can deform to form a laminated elastomer structure. The deformation layer of the second blade generates shear deformation so that the two ends of the composite blade can rotate relatively, the whole composite blade generates torsional deformation, centrifugal force is transmitted to the composite blade part fixedly connected