The attack of armor by competent projectiles involves a punching cycle of very short duration and extreme reactions. The characteristic results, with respect to the essential properties in the design of ship protection, have been investigated by means of simple dimensional forms, and a generalization has been made by reference to a penetration coefficient. The latter is a function of the penetration number (ratio of plate thickness to projectile diameter) and the obliquity of impact. A similar treatment of the absorption problem is outlined, and the special case of thin plate is of note in the implied linear velocity law of reaction. Conditions for extension in scale are stated and also certain convenient ratios for the estimation of the relative limits of nonsimilar systems.

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obliquity of impact number absorption problem design of ship protection punching cycle linear velocity law of penetration nonsimilar systems dimensional forms plate

L. Thompson,.Reduced Scale Studies in Armor Penetration. 3 (3),155.

L. Thompson,"Reduced Scale Studies in Armor Penetration" 3

L. Thompson,"Reduced Scale Studies in Armor Penetration"