Abstract: A armor system for protecting a vehicle from a projectile, the projectile having an expected trajectory and the vehicle having a hull, is disclosed. The armor system has a modular armor subsystem configured to be mounted exterior to the vehicle hull. The modular armor subsystem has a leading layer having metal, leading relative to the expected projectile trajectory, and an intermediate sheet-like layer having low density material, of a density less than metal, abutting a rear surface of the leading layer. The armor system also has an intermediate sheet-like layer having glass fiber material and abutting a rear surface of the intermediate low density material layer, and an intermediate sheet-like layer having metal and abutting a rear surface of the intermediate glass fiber layer.

Abstract: A armor system for protecting a vehicle from a projectile, the projectile having an expected trajectory and the vehicle having a hull, is disclosed. The armor system has a modular armor subsystem configured to be mounted exterior to the vehicle hull. The modular armor subsystem has a leading layer having metal, leading relative to the expected projectile trajectory, and an intermediate sheet-like layer having low density material, of a density less than metal, abutting a rear surface of the leading layer. The armor system also has an intermediate sheet-like layer having glass fiber material and abutting a rear surface of the intermediate low density material layer, and an intermediate sheet-like layer having metal and abutting a rear surface of the intermediate glass fiber layer.

Abstract: The disclosed armor system for protecting a vehicle from high energy projectiles includes a leading layer, relative to the projectile trajectory, positioned exterior to the hull; a first plurality of sheet-like layers of a low density material positioned between the leading layer and the hull; and a second plurality of sheet-like high strength metal layers positioned between the leading layer and the hull. The individual ones of the first plurality of high strength metal layers are positioned alternating with, and to the rear of, individual ones of the second plurality of low density material layers. The leading layer can be one of a sheet-like metal layer, a metalicized grid layer, and the outer-most layer of the first plurality of low density materials layers. The materials of the high strength metal layers may be selected from high strength steel and high strength aluminum, and the materials of the low density material may be selected from low density polypropylene composites and R-Glass composites.