Abstract: A wind turbine blade having an improved balance of strength, weight and aerodynamic characteristics suitable for use with a governing mechanism includes an elongated member having a cross-sectional profile having a top surface, a leading edge, a trailing edge and a bottom surface between the leading and trailing edges. The top surface of the profile is configured to be substantially in the form of a standard airfoil. The leading edge is configured to be substantially in the form of a standard air foil while the bottom surface is configured to have a concave surface extending between the leading edge and the trailing edge. The elongated member is preferably a hollow chord made from a rectangular sheet of aluminum having an elongated central portion and opposite side edges. The blade is formed by folding the sheet along its central portion and rigidly attaching the side edges to each other.