초록 ▼

An aerodynamic device, such as a projectile includes an elongated forebody, and an aft section secured to the forebody. The aft section acts as a d control device, and includes a connecting member that extends integrally in a conically shaped flared section, for generating a lift force to help stabi

An aerodynamic device, such as a projectile includes an elongated forebody, and an aft section secured to the forebody. The aft section acts as a d control device, and includes a connecting member that extends integrally in a conically shaped flared section, for generating a lift force to help stabilize the projectile during forward flight. The aft section further includes a flange that extends from the flared section, and that provides velocity decay and optimal drag, in order to limit the projectile flight and descent within a predetermined safety or emergency range. The flared section is defined between an innermost edge positioned adjacent to the connecting member, and an outermost edge positioned adjacent to the flange. The flange includes a forward facing wall that extends from the outermost edge and that has a height "H" that controls the amount of drag on the projectile, such that the outer diameter of the aft section is less than, or equal to the inner diameter of the gun barrel from which the projectile is fired.

대표청구항 ▼

[ What is claimed is:] [1.] 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 con

[ What is claimed is:] [1.] 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.