Boot mechanism for complex projectile base survival
First Claim
1. A projectile to be shot from the barrel of a gun by a charge, the projectile including a base, fins pivotably mounted to the base, weight reducing voids formed in the base and an incompressible filler material in the voids that limits propagation of shock waves in and around the base as the charge is setoff.
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Accused Products
Abstract
A projectile (10) with extensible fins (24) is designed to be lightweight by removing material unnecessary to structural strength and filling the resulting voids with a non-metallic filler material (26). Although particularly suited where the extensible fins (24) are mounted behind the obturator (22) and that are therefore subjected to turbulent, destructive shock waves when the projectile is accelerated down the gun barrel, the method and apparatus can be used elsewhere as well. The filler material (26) may be high temperature grease, an epoxy, a silicone or other similar materials. The filler material (26) may be designed to fall away as soon as the projectile (10) exits the gun barrel, or it may be permanently adhered to the material of the projectile. The filler may be surrounded by a frangible boot (66, 66′) to protect the filler during storage, shipment and loading into the gun.
54 Citations
16 Claims
- 1. A projectile to be shot from the barrel of a gun by a charge, the projectile including a base, fins pivotably mounted to the base, weight reducing voids formed in the base and an incompressible filler material in the voids that limits propagation of shock waves in and around the base as the charge is setoff.
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11. A method of protecting extensible fins of a projectile as it is fired by
a charge from the barrel of a gun, the method including the steps of providing a projectile having a base with fin receiving slots and extensible fins mounted in to the base in the slots, and filling the slots with a non-metallic, substantially incompressible filler material.
Specification