The turbine has blades (4), fastened to a horizontal shaft (2). The blades have a very strong profile, and the wind forces are concentrated on the side surfaces, to increase rotary force. They are fastened in a pendulous fashion, with side parts facing to the rear, to the shaft, which is wider at the front. This permits the centre of gravity of the turbine to be moved forward against the wind. The blades are arrow-shaped, to permit self-adjustment of the turbine in the wind, and gives improved stability. USE - Horizontal axis wind turbine with adjustable blades.