Static port skin applique apparatus and method
View Patent ↗A surface-mounted fuselage skin appliqué panel having an aperture to a reference static air input port is rugged, replaceable, and independently calibratable. The static port skin appliqué generally conforms to the fuselage surface, and is held in place either with adhesive or with a mounting frame. The appliqué size enables airflow in the vicinity of the static port to be substantially uniform. Because the appliqué is not part of the fuselage structure, distorting stress loads are avoided. The appliqué material resists scratches and bumps that can distort flow. A static port skin appliqué and its mounting provisions can be made using a range of materials, and can receive finishes to meet user preferences.
1. A static port skin appliqué for an aircraft measurement reference, comprising:
a panel configured to overlay and to be substantially conformal to a fuselage surface at a location;
a retainer configured to secure the panel against the fuselage surface at the location;
an aperture in the panel, configured to couple air to a corresponding aperture in a static port inboard of the panel;
a hole pattern through the panel in a direction perpendicular to an external surface of the static port, wherein the hole pattern has dimensions parallel to the external surface of the static port substantially equal to dimensions of a hole pattern in the static port; and
a thermally conductive insert fitted into the panel, wherein, exclusive of holes of the hole pattern, the combined thickness of the insert and panel at each point covered at least in part by the insert is substantially equal to the thickness of the panel away from the insert, wherein the insert contacts, aligns with, has a surface area comparable to a surface area of, and has a contour approximately equal to a contour of, the static port, and wherein the insert includes the hole pattern.
2. The static port skin appliqué of claim 1 , wherein panel surface contours substantially duplicate fuselage surface contours at the location, and wherein panel airflow properties substantially duplicate fuselage surface airflow properties proximal to the aperture.
3. The static port skin appliqué of claim 1 , wherein the retainer further comprises:
a mounting frame configured to secure a perimeter of the panel to the fuselage surface;
a faired preparation for the mounting frame, whereby airflow proximal to the aperture has low turbulence; and
a fastening provision, whereby attachment of the mounting frame and retention of the panel to an aircraft withstand a full range of flight stresses.
4. The static port skin appliqué of claim 3 , wherein the faired preparation for the mounting frame further comprises:
application of an adhesive sealant material, whereby access of airflow and penetration of water and other contaminants between at least one component of the static port skin appliqué and the fuselage surface is substantially prevented; and
application of a sealant grease material, whereby access of airflow and penetration of water and other contaminants between the aperture in the panel and any portion of the fuselage other than the corresponding aperture in the static port is substantially prevented.
5. The static port skin appliqué of claim 4 , wherein sealant grease occupying an interstitial volume between the thermally conductive insert and the static port, proximal to the hole pattern therethrough, is thermally conductive.
6. The static port skin appliqué of claim 3 , wherein the mounting frame further comprises a plurality of frame elements, each generally conformal to and overlaying at least a portion of a boundary edge of the panel with a panel retention part of each frame element, and generally conformal to a fuselage surface on a mounting part of each frame element distal to the panel retention part thereof.
7. The static port skin appliqué of claim 6 , wherein a z-bar portion of the frame is overlaid at least in part with adhesive sealant.
8. The static port skin appliqué of claim 6 , wherein a transition from the panel retention part of a frame element to the panel comprises adhesive sealant.
9. The static port skin appliqué of claim 1 , wherein the panel further comprises:
a panel material having structural properties comparable in at least one of resilience and hardness to a fuselage surface material;
a panel material having thermal and dimensional isomorphic properties compatible with closely fitting the panel to the fuselage surface; and
a material coating on an exterior surface of the panel compatible with conventional aircraft finishing and finish maintenance methods.
10. The static port skin appliqué of claim 9 , wherein the panel further comprises:
a molding compound, wherein the molding compound comprises any one of polyester, acrylic, urethane, polycarbonate, polyetherketone, and epoxy;
an outer-layer reinforcing filler, wherein the outer-layer reinforcing filler is fiberglass, aramid, or extended chain polyethylene; and
an inner-layer reinforcing filler, wherein the inner-layer reinforcing filler is carbon fiber.
11. The static port skin appliqué of claim 9 , wherein the panel further comprises a metallic material, wherein the metallic material comprises any one of a single layer of aircraft aluminum alloy, a metallic laminate, and a composite of metallic and nonmetallic materials.
12. The static port skin appliqué of claim 9 , wherein a finishing process applied thereto is substantially identical to an aircraft fuselage skin surface finishing process.
13. The static port skin appliqué of claim 1 , wherein the retainer further comprises at least one of:
an adhesive material, whereby the panel is secured to the fuselage surface;
an adhesive material substantially equivalent in application methodology to a contact cement;
an adhesive material activated by heating;
an adhesive material, a bond of which to a fuselage surface is subject to release by a solvent; and
an adhesive material having gap filling capability, whereby bonding between the panel and the fuselage surface takes place with low occurrence of unjoined regions.
14. The static port skin appliqué of claim 1 , wherein the retainer further comprises an adhesive material, and wherein the panel is configured to be attached to the fuselage surface by an adhesive layer.
15. The static port skin appliqué of claim 14 , wherein the adhesive material is applied to each of the surfaces to be joined and allowed to dry before pressing them together.
16. The static port skin appliqué of claim 14 , wherein the adhesive material is subject to activation by a process, wherein the process comprises at least one of heating and pressure.
17. The static port skin appliqué of claim 14 , wherein the adhesive material is characterized by gap filling capability sufficient to establish uniform bonding between at least a portion of the panel and the fuselage surface.
18. The static port skin appliqué of claim 14 , wherein a bond between the panel and the fuselage surface is subject to release by an agent, wherein the agent comprises any one of a solvent and a debonding agent.
19. The static port skin appliqué of claim 1 , wherein the hole pattern comprising the panel aperture substantially aligns with the hole pattern in the static port.
20. The static port skin appliqué of claim 1 , wherein removal and replacement of the appliqué corrects airflow distortion effects associated with impact or scratch events at least at some levels of severity thereof.