Abstract: An efficient axial fan includes an upper camber with a linear angle upper surface that expands from the leading edge of upper camber to the top of the surface and decreases from this peak to the trailing edge of upper camber, a lower camber with the parabolic curve vertex surface and the reverse parabolic curve vertex surface and the pointed lower surface as a result of a sudden curve towards the trailing edge of lower camber of the surface, a tip end connecting the ends of the wings to prevent eddies to form at the ends, a roof end connecting the bottom of the wings, at least one middle beam positioned between the lower camber and the upper camber associated with the tip end and the roof end, and a mean camber fixed on the middle beam located 90 degrees perpendicularly between the lower camber and the upper camber.

Abstract: A 2-piece axial fan blade designed for a cooling tower includes an upper wing and a lower wing, in which the upper wing includes an upper wing upper profile and an upper wing lower profile at a first torsion angle, and the lower wing includes an lower wing upper profile and a lower wing lower profile arranged so that the lower wing has a second torsion angle parallel to the upper wing. The upper wing further includes a decoupled twin profile rod fixed between the upper wing upper profile and the upper wing lower profile. The lower wing upper profile and the lower wing lower profile are parallel to a direction of extension of wing profiles.

Abstract: An efficient axial fan includes an upper camber with a linear angle upper surface that expands from the leading edge of upper camber to the top of the surface and decreases from this peak to the trailing edge of upper camber, a lower camber with the parabolic curve vertex surface and the reverse parabolic curve vertex surface and the pointed lower surface as a result of a sudden curve towards the trailing edge of lover camber of the surface, a tip end connecting the ends of the wings to prevent eddies to form at the ends, a roof end connecting the bottom of the wings, at least one middle beam positioned between the lower camber and the upper camber associated with the tip end and the roof end, and a mean camber fixed on the middle beam located 90 degrees perpendicularly between the lower camber and the upper camber.

Abstract: A 2-piece axial fan blade designed for a cooling tower includes an upper wing and a lower wing, in which the upper wing includes an upper wing upper profile and an upper wing lower profile at a first torsion angle, and the lower wing includes an lower wing upper profile and a lower wing lower profile arranged so that the lower wing has a second torsion angle parallel to the upper wing. The upper wing further includes a decoupled twin profile rod fixed between the upper wing upper profile and the upper wing lower profile. The lower wing upper profile and the lower wing lower profile are parallel to a direction of extension of wing profiles.