Apparatuses and methods for aerodynamic window assemblies

• US 10,293,915 B2
• Filed: 12/13/2016
• Issued: 05/21/2019
• Est. Priority Date: 12/13/2016
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Smith, Randal H., Spalart, Philippe R., LeDoux, Stephen T., Poling, Hugh, Baillie, Jerald C.
• Primary Examiner(s): Xavier, Valentina
• Application Number:
  US15/377,630
• Publication Number:
  US 20180162512A1
• Time in Patent Office: 889 Days
• CPC Class Codes: B64C 1/1476 Canopies; Windscreens or similar transparent elements
• CPC Class Codes: B64C 1/1484 Windows B64C1/1492 takes precedence
• CPC Class Codes: B64C 1/1492 Structure and mounting of the transparent elements in the window or windscreen
• CPC Class Codes: B64F 5/10 Manufacturing or assembling aircraft, e.g. jigs therefor

Abstract

A window assembly for an aircraft is provided that includes a windshield, a side window, a post, and an airflow surface. The windshield is oriented toward a front of the aircraft. The side window is oriented toward a side of the aircraft. The post is interposed between the windshield and the side window. The airflow surface is disposed on the post and on an exterior of the aircraft. The airflow surface extends along a length from a leading edge proximate the windshield to a trailing edge proximate the side window, and extends along a height between a top and a bottom. The airflow surface has a first radius of curvature proximate the leading edge and a second radius of curvature proximate the trailing edge, wherein the first radius of curvature is less than the second radius of curvature.

Claims

1. A window assembly for an aircraft comprising:

a windshield oriented toward a front of the aircraft;

a side window oriented toward a side of the aircraft;

a post interposed between the windshield and the side window; and

an airflow surface disposed on the post and on an exterior of the aircraft, the airflow surface extending along a length from a leading edge proximate the windshield to a trailing edge proximate the side window, the airflow surface extending along a height between a top and a bottom, the airflow surface having a first radius of curvature proximate the leading edge and a second radius of curvature proximate the trailing edge, wherein the first radius of curvature is less than the second radius of curvature.

2. The window assembly of claim 1, wherein a minimum radius of curvature for the airflow surface is interposed between the leading edge of the airflow surface and a midpoint of the airflow surface.

3. The window assembly of claim 1, wherein the side window is substantially flat and the airflow surface has a linear slope at the trailing edge.

4. The window assembly of claim 1, wherein a profile of the airflow surface is configured based on local flow conditions.

5. The window assembly of claim 1, wherein a profile of the airflow surface varies along the height of the airflow surface.

6. The window assembly of claim 1, wherein the length is between 3 and 4 inches, and the airflow surface defines a maximum thickness between 0.35 and 0.5 inches.

7. The window assembly of claim 1, wherein a maximum thickness defined by the airflow surface is interposed between the leading edge of the airflow surface and a midpoint of the airflow surface.

8. The window assembly of claim 1, further comprising a windshield frame surrounding at least a portion of the windshield, and a side frame surrounding at least portion of the side window, wherein the post comprises at least a portion of the windshield frame and at least a portion of the side frame.

9. The window assembly of claim 1, further comprising an aerodynamic member secured to an outer surface of the post, wherein the aerodynamic member comprises the airflow surface.

10. The window assembly of claim 1, wherein the airflow surface comprises a machined surface of the post.

11. A method comprising:

providing a windshield oriented toward a front of an aircraft, a side window oriented toward a side of the aircraft, and a post interposed between the windshield and the side window; and

forming an airflow surface disposed on the post and on an exterior of the aircraft, the airflow surface extending along a length from a leading edge proximate the windshield to a trailing edge proximate the side window, the airflow surface extending along a height between a top and a bottom, the airflow surface having a first radius of curvature proximate the leading edge and a second radius of curvature proximate the trailing edge, wherein the first radius of curvature is less than the second radius of curvature.

12. The method of claim 11, wherein forming the airflow surface comprises securing an aerodynamic member to an outer surface of the post, wherein the aerodynamic member comprises the airflow surface.

13. The method of claim 12, wherein securing the aerodynamic member to the outer surface of the post comprises securing an interior surface of the aerodynamic member to the outer surface of the post, wherein the interior surface defines a constant radius of curvature.

14. The method of claim 11, wherein a profile of the airflow surface varies along the height of the airflow surface.

15. The method of claim 11, wherein a maximum thickness defined by the airflow surface is interposed between the leading edge of the airflow surface and a midpoint of the airflow surface.

16. An aerodynamic member configured to be secured to an aircraft window assembly, the aircraft window assembly comprising a windshield oriented toward a front of an aircraft, a side window oriented toward a side of the aircraft, and a post interposed between the windshield and the side window, the aerodynamic member comprising:

an airflow surface configured to be disposed on the post and on an exterior of the aircraft when the aerodynamic member is secured to the aircraft window assembly, the airflow surface extending along a length from a leading edge of the airflow surface to a trailing edge of the airflow surface, the airflow surface extending along a height between a top and a bottom, the airflow surface having a first radius of curvature proximate the leading edge and a second radius of curvature proximate the trailing edge, wherein the first radius of curvature is less than the second radius of curvature.

17. The aerodynamic member of claim 16, further comprising an interior surface of the aerodynamic member configured to be secured to an outer surface of the post, wherein the interior surface defines a constant radius of curvature.

18. The aerodynamic member of claim 16, wherein a profile of the airflow surface varies along the height of the airflow surface.

19. The aerodynamic member of claim 16, wherein a minimum radius of curvature for the airflow surface is interposed between the leading edge of the airflow surface and a midpoint of the airflow surface.

20. The aerodynamic member of claim 16, wherein a maximum thickness defined by the airflow surface is interposed between the leading edge of the airflow surface and a midpoint of the airflow surface.