The Effect of Yaw upon Penetration; the Effect upon Bullets of Penetrating very Thin Duralumin Sheets; and the Use of Shielding Structures in the Form of Gratings

摘要

If armor is spaced back inside the fuselage of an aircraft, bullets may tumble before striking the armor due to penetrating a Duralumin sheet at large obliquity. The effect of a shielding Duralumin sheet at 60 degrees obliquity and 23 inches separation on the limit of a typical bullet-proof plate at normal incidence is shown to be more than 200 feet per second. There is a gain in weight efficiency even when the resolved weight of the Duralumin is included with that of the armor plate.nThe efficiency of a light grating used as the first plate of a divided armor structure depends considerably upon design