GUIDED PROJECTILE AND METHOD OF ENABLING GUIDANCE THEREOF

• US 20170268855A1
• Filed: 03/15/2016
• Published: 09/21/2017
• Est. Priority Date: 03/15/2016
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: McAllister, Edward, Rackers, Keith, Qato, Ledjan, Binkholder, Ryan Glen, Klakovich, Vincent Wayne
• Granted Patent: US 10,151,568 B2
• Time in Patent Office: Days
• CPC Class Codes: F42B 10/14 using fins spread or deployed after launch, e.g. after leaving the barrel
• CPC Class Codes: F42B 10/64 of fins

Abstract

A guided projectile that includes a warhead case, a cartridge case coupled to the warhead case, and a tail kit assembly positioned within the cartridge case. The tail kit assembly includes a hollow casing including a plurality of fin slots defined therein, a control fin selectively extendable from within the hollow casing through each fin slot of the plurality of fin slots, and a fin slot cover positioned within each fin slot with a minimum clearance fit such that the control fin is retained within the hollow casing. The fin slot cover is releasable from within each fin slot such that the control fin is deployable therethrough.

Claims

1. A guided projectile comprising:

a warhead case;

a cartridge case coupled to said warhead case; and

a tail kit assembly positioned within said cartridge case, said tail kit assembly comprising;

a hollow casing comprising a plurality of fin slots defined therein;

a control fin selectively extendable from within said hollow casing through each fin slot of said plurality of fin slots; and

a fin slot cover positioned within each fin slot with a minimum clearance fit such that said control fin is retained within said hollow casing, wherein said fin slot cover is releasable from within each fin slot such that said control fin is deployable therethrough.

2. The guided projectile in accordance with claim 1, wherein said fin slot cover is positioned such that said fin slot cover is configured for release from within each fin slot when a centrifugal force is induced to said fin slot cover.

3. The guided projectile in accordance with claim 1, wherein said tail kit assembly further comprises a flexible sealing member compressibly disposed between said fin slot cover and a portion of said hollow casing.

4. The guided projectile in accordance with claim 3, wherein said fin slot cover comprises a retaining groove sized to receive said flexible sealing member therein, said retaining groove extending about a periphery of said fin slot cover.

5. The guided projectile in accordance with claim 4, wherein said flexible sealing member has a thickness such that said flexible sealing member and at least a portion of said fin slot cover have a larger profile than said opening of each fin slot.

6. The guided projectile in accordance with claim 3, wherein said fin slot cover is sized relative to each fin slot to have the minimum clearance fit such that said fin slot cover and said flexible sealing member disposed between said fin slot cover and said each fin slot yield a compression fit for retaining said fin slot cover with a predetermined retaining force of at least 5 pounds.

7. The guided projectile in accordance with claim 1, wherein said hollow casing has a cylindrical cross-sectional shape extending continuously between a forward end and an aft end of said hollow casing.

8. The guided projectile in accordance with claim 7 further comprising a protective cap positioned at said aft end of said hollow casing.

9. A tail kit assembly for use with a guided projectile, said tail kit assembly comprising:

a hollow casing comprising a plurality of fin slots defined therein;

a control fin selectively extendable from within said hollow casing through each fin slot of said plurality of fin slots; and

a fin slot cover positioned within each fin slot with a minimum clearance fit such that said control fin is retained within said hollow casing, wherein said fin slot cover is releasable from within each fin slot such that said control fin is deployable therethrough.

10. The assembly in accordance with claim 9, wherein said fin slot cover is positioned such that said fin slot cover is configured for release from within each fin slot when a centrifugal force is induced to said fin slot cover.

11. The assembly in accordance with claim 9 further comprising a flexible sealing member compressibly disposed between said fin slot cover and a portion of said hollow casing.

12. The assembly in accordance with claim 11, wherein said fin slot cover comprises a retaining groove sized to receive said flexible sealing member therein, said retaining groove extending about a periphery of said fin slot cover.

13. The assembly in accordance with claim 12, wherein said flexible sealing member has a thickness such that said flexible sealing member is compressibly disposed between said fin slot and said fin slot cover with a predetermined retaining force greater than that required for projectile handling and loading, and less than that encountered during gun muzzle egress.

14. The assembly in accordance with claim 11, wherein said fin slot cover is sized relative to each fin slot to have the minimum clearance fit such that said fin slot cover and said flexible sealing member disposed between said fin slot cover and said each fin slot yield a compression fit for retaining said fin slot cover with a predetermined retaining force of at least 5 pounds.

15. The assembly in accordance with claim 9, wherein said hollow casing has a cylindrical cross-sectional shape extending continuously between a forward end and an aft end of said hollow casing.

16. The assembly in accordance with claim 15 further comprising a protective cap positioned at said aft end of said hollow casing.

17. A method of enabling guidance of a guided projectile, said method comprising:

loading the guided projectile into a projectile launcher, the guided projectile including a hollow casing, a control fin selectively extendable from within the hollow casing through a fin slot defined in the hollow casing, and a fin slot cover positioned within the fin slot with a minimum clearance fit such that the control fin is retained within the hollow casing; and

inducing a centrifugal force to the fin slot cover such that the fin slot cover is released from the hollow casing, and such that the control fin is deployed from within the hollow casing.

18. The method in accordance with claim 17, wherein inducing a centrifugal force to the fin slot cover comprises discharging the guided projectile from the projectile launcher.

19. The method in accordance with claim 18, wherein discharging the guided projectile comprises discharging the guided projectile from the projectile launcher having a rifled barrel.

20. The method in accordance with claim 17, wherein inducing a centrifugal force to the fin slot cover comprises releasing the fin slot cover from the hollow casing such that the fin slot cover is foreign object debris.