Hybrid spin/fin stabilized projectile

Details Hybrid spin/fin stabilized projectile Hybrid spin/fin stabilized projectile

2007-06-24

2010-12-14

Eldred, J. Woodrow (Department: 3641)

Ammunition and explosives

Projectiles

C102S473000, C102S490000, C244S003230, C244S003240

Reexamination Certificate

active

07849800

ABSTRACT:
A hybrid spin/fin stabilized projectile. The novel projectile includes a body, a first mechanism for spin stabilizing the body during a first mode, and a second mechanism for fin stabilizing the body during a second mode. In an illustrative embodiment, the projectile includes a rifling band adapted to engage with rifling in a gun during gun launch to impart a spin rate compatible with spin stabilization to the projectile, and a plurality of folding fins attached to an aft end of the body. A fin locking mechanism locks the fins in an undeployed position during the first mode and unlocks to deploy the fins at a predetermined time to switch the projectile to fin stabilization during the second mode. The projectile also includes a mechanism for reducing the spin of the projectile to a rate compatible with guided flight during the second mode.

REFERENCES:
patent: 4546940 (1985-10-01), Andersson et al.
patent: 5386951 (1995-02-01), Gaywood
patent: 6135387 (2000-10-01), Seidel et al.
patent: 2005/0051667 (2005-03-01), Arlton et al.
patent: WO-2009/002449 (2008-12-01), None
“International Application Serial No. PCT/US2008/007710, International Search Report and Written Opinion mailed Oct. 2, 2008”, 9 pgs.

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