Versatile door systems for vehicles

1. A versatile door system for a vehicle having a frame with an opening, the door system comprising:

a door assembly including a hingeable door and a slidable door, the hingeable door hingeably coupled to the frame proximate the opening, the slidable door slidably coupled to the hingeable door; and

a rail system including a segmented upper rail having a first portion coupled to the frame and a second portion formed on an exterior side of the hingeable door;

wherein, the slidable door includes a slider bearing configured to sequentially engage the first and second portions of the segmented upper rail along a path of travel of the slidable door;

wherein, in a closed configuration, the hingeable door and the slidable door are securably disposed within the opening; and

wherein, the hingeable door and the slidable door are configured to collectively provide access to selectable portions of the opening.

2. The door system as recited in claim 1 wherein the slidable door has a closed position in which the slidable door is disposed within the opening and is longitudinally aligned with the hingeable door and an open position in which the slidable door is slid into an exterior position relative to the hingeable door; and

wherein the hingeable door has a closed position in which the hingeable door is disposed within the opening and an open position in which the hingeable door is pivoted outwardly relative to the opening together with the slidable door.

3. The door system as recited in claim 2 wherein, in an open configuration, the slidable door is in the open position and the hingeable door is in the closed position, such that the door system provides access to at least a portion of the opening.

4. The door system as recited in claim 2 wherein, in an open configuration, the slidable door is in the open position and the hingeable door is in the open position such that the door system provides access to at least a portion of the opening.

5. The door system as recited in claim 2 wherein, when the slidable door is in the open position, the slidable door is secured against movement relative to the hingeable door.

6. The door system as recited in claim 1 wherein, in the closed configuration, the hingeable door and the slidable door are latched to the frame.

7. The door system as recited in claim 1 wherein the rail system further comprises a lower rail coupled to the hingeable door; and

wherein the slidable door travels on the upper rail and the lower rail between open and closed positions.

8. A versatile door system for a vehicle having a frame with an opening, the door system comprising:

a first door assembly including a first hingeable door and a first slidable door, the first hingeable door hingeably coupled to the frame proximate a first side of the opening, the first slidable door slidably coupled to the first hingeable door;

a second door assembly including a second hingeable door and a second slidable door, the second hingeable door hingeably coupled to the frame proximate a second side of the opening, the second slidable door slidably coupled to the second hingeable door; and

a rail system including a first segmented upper rail having a portion coupled to the frame and a portion formed on an exterior side of the first hingeable door and a second segmented upper rail having a portion coupled to the frame and a portion formed on an exterior side of the second hingeable door;

wherein, the first slidable door includes a first slider bearing configured to sequentially engage the two portions of the first segmented upper rail along a path of travel of the first slidable door and the second slidable door includes a second slider bearing configured to sequentially engage the two portions of the second segmented upper rail along a path of travel of the second slidable door;

wherein, in a closed configuration, each of the doors is securably disposed within the opening; and

wherein, the first hingeable door, the first slidable door, the second hingeable door and the second slidable door are configured to collectively provide access to selectable portions of the opening.

9. The door system as recited in claim 8 wherein the first slidable door has a closed position in which the first slidable door is disposed within the opening and is longitudinally aligned with the first hingeable door and an open position in which the first slidable door is slid into an exterior position relative to the first hingeable door;

wherein the first hingeable door has a closed position in which the first hingeable door is disposed within the opening and an open position in which the first hingeable door is pivoted relative to the opening together with the first slidable door;

wherein the second slidable door has a closed position in which the second slidable door is disposed within the opening and is longitudinally aligned with the second hingeable door and an open position in which the second slidable door is slid into an exterior position relative to the second hingeable door; and

wherein the second hingeable door has a closed position in which the second hingeable door is disposed within the opening and an open position in which the second hingeable door is pivoted relative to the opening together with the second slidable door.

10. The door system as recited in claim 9 wherein, in an open configuration, the first slidable door is in the open position, the first hingeable door is in the closed position, the second slidable door is in the closed position and the second hingeable door is in the closed position such that the door system provides access to about a quarter width of the opening.

11. The door system as recited in claim 9 wherein, in an open configuration, the first slidable door is in the closed position, the first hingeable door is in the closed position, the second slidable door is in the open position and the second hingeable door is in the closed position such that the door system provides access to about a quarter width of the opening.

12. The door system as recited in claim 9 wherein, in an open configuration, the first slidable door is in the open position, the first hingeable door is in the open position, the second slidable door is in the closed position and the second hingeable door is in the closed position such that the door system provides access to about a half width of the opening.

13. The door system as recited in claim 9 wherein, in an open configuration, the first slidable door is in the open position, the first hingeable door is in the closed position, the second slidable door is in the open position and the second hingeable door is in the closed position such that the door system provides access to about a half width of the opening.

14. The door system as recited in claim 9 wherein, in an open configuration, the first slidable door is in the closed position, the first hingeable door is in the closed position, the second slidable door is in the open position and the second hingeable door is in the open position such that the door system provides access to about a half width of the opening.

15. The door system as recited in claim 9 wherein, in an open configuration, the first slidable door is in the open position, the first hingeable door is in the open position, the second slidable door is in the open position and the second hingeable door is in the closed position such that the door system provides access to about a three quarter width of the opening.

16. The door system as recited in claim 9 wherein, in an open configuration, the first slidable door is in the open position, the first hingeable door is in the closed position, the second slidable door is in the open position and the second hingeable door is in the open position such that the door system provides access to about a three quarter width of the opening.

17. The door system as recited in claim 9 wherein, in an open configuration, the first slidable door is in the open position, the first hingeable door is in the open position, the second slidable door is in the open position and the second hingeable door is in the open position such that the door system provides access to about a full width of the opening.

18. A vehicle comprising:

a frame having an opening; and

a versatile door system coupled to the frame, the door system including:

a first door assembly including a first hingeable door and a first slidable door, the first hingeable door hingeably coupled to the frame proximate a first side of the opening, the first slidable door slidably coupled to the first hingeable door;

a second door assembly including a second hingeable door and a second slidable door, the second hingeable door hingeably coupled to the frame proximate a second side of the opening, the second slidable door slidably coupled to the second hingeable door; and

a rail system including a first segmented upper rail having a portion coupled to the frame and a portion formed on an exterior side of the first hingeable door and a second segmented upper rail having a portion coupled to the frame and a portion formed on an exterior side of the second hingeable door;

wherein, the first slidable door includes a first slider bearing configured to sequentially engage the two portions of the first segmented upper rail along a path of travel of the first slidable door and the second slidable door includes a second slider bearing configured to sequentially engage the two portions of the second segmented upper rail along a path of travel of the second slidable door;

wherein, in a closed configuration, each of the doors is securably disposed within the opening; and

wherein, the first hingeable door, the first slidable door, the second hingeable door and the second slidable door are configured to collectively provide access to selectable portions of the opening.

19. The vehicle as recited in claim 18 wherein the vehicle further comprises an aircraft.

20. The vehicle as recited in claim 18 wherein the vehicle further comprises a rotorcraft.