A bullet for a rifle, an artillery shell, or even a missile is all subject to drag. The vacuum created as air moving at high speed passes over the end or past any change of angle of a projectile or missile slows the projectile or missile. Placing dimples or depressions, or the inverse thereof, around the circumference and or along the length of a bullet to create vortices to disrupt the air flow will fill the area where partial vacuums form with air. The streamlined boat tail bullet design, as an example, reduces this form drag by allowing the air to flow along the surface of the tapering end. The resulting aerodynamic advantage is currently seen as the optimum shape for rifle technology. This invention will also further reduce drag and increase range, velocity, and trajectory.


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    Title :

    Projectile and Missile Enhancement and Drag Reduction Technology


    Contributors:

    Publication date :

    2016-06-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F42B EXPLOSIVE CHARGES, e.g. FOR BLASTING , Explosive Ladungen, z.B. für Sprengungen / B64C AEROPLANES , Flugzeuge



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    Srinivasan, G. / Chamberlain, R. | AIAA | 2004



    Computed drag reduction on a projectile using porous surfaces

    Hsiung, Jih-Lan / Chow, Chuen-Yen | AIAA | 1995