Shell arranged with extensible wings and guiding device

• US 8,686,330 B2
• Filed: 02/24/2011
• Issued: 04/01/2014
• Est. Priority Date: 02/25/2010
• Status: Active Grant

• Current Assignee: BAE Systems Hã¤Gglunds AB
• Original Assignee: BAE Systems Hã¤Gglunds AB
• Inventors: Johansson, Nils
• Primary Examiner(s): GREGORY, BERNARR E
• Application Number:
  US13/580,874
• Publication Number:
  US 20130048778A1
• Time in Patent Office: 1,132 Days
• Field of Search: 244 31- 33, 244/34.R, 244/35.R, 244/45.R, 244/46, 244/49, 102/382, 102/384, 102/386, 102/473, 102/490, 102/501
• US Class Current: 244/3.28
• CPC Class Codes: F42B 10/38 Range-increasing arrangements F42B10/34, F42B14/06 and F42B15/105 take precedence
• CPC Class Codes: F42B 10/62 Steering by movement of flight surfaces

Abstract

The invention relates to a shell (1) arranged with extensible wings (3) having improved guidance characteristics during the gliding and final phase of the shell (1). The invention is characterized in that the extensible wings (3), via threaded wing fixtures (8), are movably arranged on rotatable axial guide shafts (6) on the shell body (2) for separate or simultaneous displacement of the wings (3) in the longitudinal direction A of the shell (1), for guidance of the shell (1) in the vertical and lateral directions during the trajectory phase of the shell, and in that the wings (3) are also rotatably arranged on radial guide shafts for controlling the angle of incidence of the wings (3) during the final phase of the shell (1).

Claims

1. A mortar shell arranged with extensible wings having improved guidance characteristics during the gliding and final phase of the shell, characterized in that the extensible wings, via threaded wing fixtures, are movably arranged on rotatable axial guide shafts on the shell body for separate or simultaneous displacement of the wings in the longitudinal direction of the shell, for guidance of the shell in the lateral direction during the gliding phase of the shell, and in that the wings are also rotatably arranged on radial guide shafts for controlling the angle of incidence of the wings during the final phase of the shell.

2. A shell according to claim 1, wherein the wings are refracted against the shell body during firing of the shell, and in that the wings are extended from the shell body when a release mechanism is activated.

3. A shell according to claim 2, wherein the release mechanism is activated on a preprogrammed basis via a programmable command and control unit arranged in the shell body.

4. A shell according to claim 3, wherein the release mechanism is activated by remote control in response to an activation signal from a ground-based transmitter.

5. A shell according to claim 4, wherein the release mechanism is electromechanical is activated on a preprogrammed basis via a programmable command and control unit arranged in the shell body.

6. A shell according to claim 5, wherein the release mechanism is pyrotechnic.

7. A shell according to claim 6, wherein the wings are hinged to allow the shape of the wings to be adapted to the shape of the shell body when the wings are retracted against the shell body.

8. A shell according to claim 5, wherein the wings are hinged to allow the shape of the wings to be adapted to the shape of the shell body when the wings are retracted against the shell body.

9. A shell according to claim 4, wherein the release mechanism is pyrotechnic.

10. A shell according to claim 4, wherein the wings are hinged to allow the shape of the wings to be adapted to the shape of the shell body when the wings are retracted against the shell body.

11. A shell according to claim 3, wherein the release mechanism is electromechanical.

12. A shell according to claim 11, wherein the release mechanism is pyrotechnic.

13. A shell according to claim 11, wherein the wings are hinged to allow the shape of the wings to be adapted to the shape of the shell body when the wings are retracted against the shell body.

14. A shell according to claim 3, wherein the release mechanism is pyrotechnic.

15. A shell according to claim 14, wherein the wings are hinged to allow the shape of the wings to be adapted to the shape of the shell body when the wings are retracted against the shell body.

16. A shell according to claim 3, wherein the wings are hinged to allow the shape of the wings to be adapted to the shape of the shell body when the wings are retracted against the shell body.

17. A shell according to claim 2, wherein the wings are hinged to allow the shape of the wings to be adapted to the shape of the shell body when the wings are retracted against the shell body.

18. A shell according to claim 1, wherein the wings are hinged to allow the shape of the wings to be adapted to the shape of the shell body when the wings are retracted against the shell body.

19. A shell according to claim 1, wherein rotation of the axial guide shafts is effected with electric motors, the torgue of which is transferred to the guide shafts via flexible rotary shafts.

20. A shell according to claim 19, wherein activation of the electric motors is realized in response to control signals from a ground-based transmitter via the programmable command and control unit.