Abstract: An airfoil of an aerodynamic surface including: a control surface having an upper surface and a lower surface, and an actuator configured to elevate or lower the control surface, wherein at least a portion of one of the upper surface and the lower surface of the control surface is auxetic with a negative Poisson ratio, and the other of the upper surface and the lower surface of the control surface includes a material with a higher Poisson ratio.

Abstract: A computer assisted method for manufacturing a foldable paraboloid antenna includes election of a two-dimensional radial Origami pattern with triangular cells and election of a paraboloid surface. The Origami pattern is projected from the paraboloid surface focus onto the paraboloid surface to print the Origami pattern on the paraboloid surface, obtaining triangles with curved sides. A pattern with triangles with straight sides on the paraboloid surface is obtained by joining vertices of the projected curved-sided triangles. The method includes scaling and calculating centroids of the triangles, to reduce each triangle referenced on the corresponding centroid and to determine spacing, obtaining a mesh with segments and triangular cells delimited by the segments. The triangular cells have triangles of reflective rigid material. The mesh is flexible, so each segment width is at least the sum of the thicknesses of two adjacent rigid triangles, and periphery cells have a rounded outer edge.

Abstract: An airfoil of an aerodynamic surface including: a control surface having an upper surface and a lower surface, and an actuator configured to elevate or lower the control surface, wherein at least a portion of one of the upper surface and the lower surface of the control surface is auxetic with a negative Poisson ratio, and the other of the upper surface and the lower surface of the control surface includes a material with a higher Poisson ratio.

Abstract: A computer assisted method for manufacturing a foldable paraboloid antenna includes election of a two-dimensional radial Origami pattern with triangular cells and election of a paraboloid surface. The Origami pattern is projected from the paraboloid surface focus onto the paraboloid surface to print the Origami pattern on the paraboloid surface, obtaining triangles with curved sides. A pattern with triangles with straight sides on the paraboloid surface is obtained by joining vertices of the projected curved-sided triangles. The method includes scaling and calculating centroids of the triangles, to reduce each triangle referenced on the corresponding centroid and to determine spacing, obtaining a mesh with segments and triangular cells delimited by the segments. The triangular cells have triangles of reflective rigid material. The mesh is flexible, so each segment width is at least the sum of the thicknesses of two adjacent rigid triangles, and periphery cells have a rounded outer edge.

Abstract: A method for manufacturing a part layer-upon-layer using Additive Manufacturing technology, the method including: printing the part together with an elastomeric enclosure shaped thereto leaving a gap free of material therebetween, the elastomeric enclosure including at least one opening; heating the ensemble of the printed part and elastomeric enclosure or keeping an operating printing temperature; applying vacuum by the at least one opening of the elastomeric enclosure so that the elastomeric enclosure deflates thus exerting pressure to the printed part; and maintaining the printed part under vacuum and heat during a predefined time.

Abstract: A method for simulating surface roughness on an aircraft part surface and a method for testing the behavior on flight of this aircraft part with surface roughness simulated, wherein the surface roughness simulation includes forming a roughness pattern on the aircraft part surface using a laser. The roughness pattern is a projectable lattice including longitudinal projections and transverse projections, wherein heights of the longitudinal and transverse projections correspond to a maximum roughness of a selected surface roughness type.

Abstract: A modular cover is provided to cover a molding tool, in which the cover comprises a plurality of plates configured to be coupled together to cover at least a portion of the surface of the molding tool, a fastening arrangement configured to fasten the plurality of plates to the molding tool, in which each of the plurality of plates has at least one coating of reflective material. A system and a method for manufacturing a structural element are also provided.

Abstract: A 3D printed drilling template (20, 30a, 30b, 30c) including: a rigid framework able to be manipulated by an operator or an automaton, and a set of traversing (22, 32a, 32b, 32c, 33c) orifices in the framework and arranged to guide the drilling of holes into a structure on which the drilling template is mounted, wherein the drilling template (20, 30a, 30b, 30c) is designed or revised on an ad-hoc basis and manufactured by 3D printing and using a 3D printing material based on a polymer material mixed with powdered graphene.

Abstract: A method for manufacturing a part layer-upon-layer using Additive Manufacturing technology, the method including: printing the part together with an elastomeric enclosure shaped thereto leaving a gap free of material therebetween, the elastomeric enclosure including at least one opening; heating the ensemble of the printed part and elastomeric enclosure or keeping an operating printing temperature; applying vacuum by the at least one opening of the elastomeric enclosure so that the elastomeric enclosure deflates thus exerting pressure to the printed part; and maintaining the printed part under vacuum and heat during a predefined time.

Abstract: An impression chamber (1) for a 3D printer (6) adapted to receive a high performance plastic filament (19) and including a print head (7) and a printing bed (8), wherein the impression chamber (1) includes a thermally insulated plate (2) and a polyimide film (3) attached to the plate (2) for delimiting a printing space (20). The plate (2) is dimensioned to have a surface (2a) equal or larger than the major surface of the piece (5) to be printed, and the film (3) is dimensioned to surround the printing bed (8). The plate (2) is provided with a first through-hole (15) for allowing the passage of at least part of the print head (7), so that the plate (2) is moved by the movement of the print head (7) and the film (3) is dragged by said movement providing a flexible impression chamber (1).

Abstract: A method for simulating surface roughness on an aircraft part surface and a method for testing the behavior on flight of this aircraft part with surface roughness simulated, wherein the surface roughness simulation includes forming a roughness pattern on the aircraft part surface using a laser.

Abstract: A system for re-energizing streamflow in control surfaces of aircraft, comprising a panel provided with at least one aerodynamic element movable at least between a rest position, where the at least one aerodynamic element does not protrude from the panel, and a use position, where the at least one aerodynamic element protrudes from the panel, acting as a vortex generator. The at least one aerodynamic element is a die-cut portion of the panel that is hinged to a remainder of the panel.

Abstract: A boundary layer suction system adapted to a surface exposed to the circulation of a fluid. The system comprises a portion of the surface, a bifurcation element for bifurcating a mass of fluid flowing along the front face of the surface, comprising an airfoil-shaped cross-section such that the fluid is bifurcated into a first and a second flow, a slot located on the portion of the surface and downstream of the leading edge of the bifurcation element, the slot communicating the front and the rear faces of the portion of the surface, and an arrangement to provide a pressure difference between the front and the rear faces of the surface around the slot, such that a suction of the boundary layer is performed through the slot by the pressure difference.

Abstract: An impression chamber (1) for a 3D printer (6) adapted to receive a high performance plastic filament (19) and including a print head (7) and a printing bed (8), wherein the impression chamber (1) includes a thermally insulated plate (2) and a polyimide film (3) attached to the plate (2) for delimiting a printing space (20). The plate (2) is dimensioned to have a surface (2a) equal or larger than the major surface of the piece (5) to be printed, and the film (3) is dimensioned to surround the printing bed (8). The plate (2) is provided with a first through-hole (15) for allowing the passage of at least part of the print head (7), so that the plate (2) is moved by the movement of the print head (7) and the film (3) is dragged by said movement providing a flexible impression chamber (1).

Abstract: A manufacturing process to form a positioning control tool, such as a gyroscope, by using a three-dimensional (3D) printer printing a polymer material mixed with powdered graphene (12a) components (410) on a piezoelectric substrate (205), the components (410) include: a resonator (411) transducer configured to create a first surface acoustic wave (215); a pair of reflectors (412a, 412b) configured to reflect the first surface acoustic wave (215); a structure (413) which, when subjected to a Coriolis force, creates a second surface acoustic wave (230); a first sensor transducer (414) configured to sense the second surface acoustic wave (230); and a second sensor transducer (415) configured to sense a residual surface acoustic wave from a second region of the surface (210) of the piezoelectric substrate free of the structures that respond to the Coriolis force.

Abstract: A 3D printed drilling template (20, 30a, 30b, 30c) including: a rigid framework able to be manipulated by an operator or an automaton, and a set of traversing (22, 32a, 32b, 32c, 33c) orifices in the framework and arranged to guide the drilling of holes into a structure on which the drilling template is mounted, wherein the drilling template (20, 30a, 30b, 30c) is designed or revised on an ad-hoc basis and manufactured by 3D printing and using a 3D printing material based on a polymer material mixed with powdered graphene.

Abstract: A boundary layer suction system adapted to a surface exposed to the circulation of a fluid. The system comprises a portion of the surface, a bifurcation element for bifurcating a mass of fluid flowing along the front face of the surface, comprising an airfoil-shaped cross-section such that the fluid is bifurcated into a first and a second flow, a slot located on the portion of the surface and upstream of the leading edge of the bifurcation element, the slot communicating the front and the rear faces of the portion of the surface, and an arrangement to provide a pressure difference between the front and the rear faces of the surface around the slot, such that a suction of the boundary layer is performed through the slot by the pressure difference.