Patent ID: 6123289
Filing Date: 2000-09-26
Classification: F42B

Abstract:
A projectile to be fired from a barrel having an inner diameter, comprising:an elongated forebody;an aft section secured to a rearward section of said forebody;said aft section including a connecting member that extends integrally in a flared section; anda flange;said connecting member securing said aft section to said forebody;said flared section extending from said connecting member to said flange;said flared section defining a generally solid conical surface that generates a lift force to help stabilize the projectile during forward flight;said flange providing a velocity decay and drag, in order to limit the projectile flight and descent within a predetermined safety or emergency range;wherein said flange is connected at the rearward edge of said flared section, and includes a forward facing wall that extends from said outermost edge of said flared section;wherein said forward facing wall has a height (H) that controls the amount of drag on the projectile; andwherein as the projectile exits the barrel, air is directed over the rearward section, generates a first shock wave (SW1) at an innermost edge of the flared section, and progresses over the flared section, and generates a second shock wave (SW2) as it reaches the forward facing wall, so as to counteract the lift force by increasing drag on the projectile.