Abstract: The invention relates to a method for manufacturing wind turbine blades, blades for propellers, wings or similar structures, and to a structure in the shape of a blade produced by means of said method, including: use a female mold of the leading edge (5), a female mold of the trailing edge (6), and a third mold (7) for a composite male tool (8) as a lost mold for manufacturing at least an inner crossbeam (4); wherein a demolding agent and an outer protective varnish is applied on the inner sides by robot or a digitally-controlled device; applying prepreg in superimposed layers; coating the prepreg with a vaccum film, and connecting to a pump for extracting air from between the prepreg layers; fitting together the molds and positioning the pieces with the prepreg laminates; and applying pressure and thermal curve for the method of curing or polymerizing the set of pieces in a single stage or all at once.

Abstract: A storage system for storing energy useful in starting and regulating electrical systems, that includes a transmission system to transmit mechanical energy between an electric machine and an energy storage device having at least one coil spring arranged in a rotating shaft; and a braking and holding element connected to the shaft to alternately block the spring or keep it in a released state, wherein the electric machine acts like a motor turning the rotating shaft in a first direction to tense the spring to store mechanical energy, and the rotation of the shaft in the opposite direction releases the mechanical energy stored in the spring and the transmission system turns the electric machine to operate the electric machine like an electric generator.