Gradient ballistic material and honeycomb grille

A gradient ballistic material and honeycomb grille for stopping a projectile while still maintaining air flow, the grille comprising;

• a grille unit which is surrounded by a mounting flange, said grille unit including;
• a plurality of flat louvers positioned parallel to each other,
• a plurality of S-louvers positioned parallel to each other;
• and
• a honeycomb unit positioned adjacent the S-louvers;
• wherein the flat louvers have a mating face that overlaps a mating face of the S-louver, and the pitch of the flat louvers is such that the projectile cannot pass through the grille in a straight line;
• and
• wherein the S-louver section includes a hook end to trap projectile fragments at a first end and a mating indent at a second end for holding the flat louver mating face.

A method for stopping a projectile while still maintaining air flow to a vehicle utilizing a gradient ballistic material and a honeycomb grille, the method comprising;

• positioning a plurality of flat louvers parallel to each other across the length of the grille,
• positioning a plurality of S-louvers parallel to each other across the length of the grille;
• and
• positioning a honeycomb unit adjacent the S-louvers;
• wherein the flat louvers have a mating face that overlaps a mating face of the S-louver;
• wherein the S-louver section includes a hook end to trap projectile fragments at a first end and a mating indent at a second end for holding the flat louver mating face:
• and the pitch of the flat louvers is such that the projectile cannot pass through the grille in a straight line.