초록 ▼

A guided artillery shell is provided with a set of tail fins which are stowed within the shell assembly prior to the firing of the shell and during barrel traversal, and are automatically deployed upon muzzle exit by a mechanism responsive to the change in pressure upon muzzle exit and centrifugal f

A guided artillery shell is provided with a set of tail fins which are stowed within the shell assembly prior to the firing of the shell and during barrel traversal, and are automatically deployed upon muzzle exit by a mechanism responsive to the change in pressure upon muzzle exit and centrifugal force.

대표청구항 ▼

A guided artillery shell having automatically deployed tail fins, comprising, a generally cylindrical fin support frame attached to the aft end of said shell\s body, said frame having a plurality of large, equally spaced pressure equalizing ports in its aft end and an equal plurality of fin slots eq

A guided artillery shell having automatically deployed tail fins, comprising, a generally cylindrical fin support frame attached to the aft end of said shell\s body, said frame having a plurality of large, equally spaced pressure equalizing ports in its aft end and an equal plurality of fin slots equally spaced around the periphery of said frame, said frame further comprising a central rod extending from the center of its aft end to the center of the aft end of said shell\s body, a piston with a central hole slidably mounted on said central rod and held, prior to muzzle exit, against said aft end of said frame by means of a shear pin passing through a shoulder on said piston and said central rod, said piston including a pressure chamber formed by a recess therein and the inside of said aft end of said frame, a plurality of small pressure control holes in said aft end of said frame communicating with said pressure chamber, a set of tail fins pivoted near one edge of their inboard ends on pins mounted in said frame, the opposite edge of said inboard ends of said fins having a projection thereon which, prior to muzzle exit, is latched under a flange on the outside of said piston, the fins completely stowed inside said frame prior to launch, whereby upon firing of said shell, the gun chamber gases will pressurize said piston pressure chamber through said pressure control holes and upon muzzle exit the pressure therein will force the piston forward, breaking said shear pin and unlatching said stowed tail fins which will then pivot around said pins to the deployed position, passing through said fin slots, with the projections thereon stopping against the forward edge of said fin slots.