초록

A hollow tubular projectile is disclosed having about 30 percent less mass than conventional ammunition projectiles and considerably less drag, as a result of precise aerodynamic design details.

대표청구항 ▼

An elongate tubular projectile having a longitudinal center axis, consisting of: a cylindrical center throat portion having a wall thickness defined by concentric inner and outer spaced-apart surfaces, a forward compression section adjoining said throat portion and formed by two converging conical s

An elongate tubular projectile having a longitudinal center axis, consisting of: a cylindrical center throat portion having a wall thickness defined by concentric inner and outer spaced-apart surfaces, a forward compression section adjoining said throat portion and formed by two converging conical surfaces intersecting each other to form a sharp leading edge and enclosing a V-shaped leading edge angle, the bisector of which in the longitudinal cross-section is substantially parallel to said longitudinal center axis, and an aft diffusion section adjoining said throat portion and formed by two converging conical surfaces forming a V-shaped trailing edge, said aft diffusion section having a smooth constant expansion angle and a smooth transition from said adjoining throat portion to said trailing edge, said throat portion having constant diameter throughout the length of said inner surface, said sharp leading edge defines a circular inlet having a predetermined first cross-sectional area for inlet airflow, said throat portion diameter defines a constant second cross-sectional area for airflow through said throat portion and the ratio of said second area to said first area is not less than 0.6.