MODERN GUNS AND PROJECTILES.
The modern armor-piercing shell, made of hardened steel, and with its conical point carefully fashioned for the greatest penetrating power, has all the armor-piercing effectiveness of a solid shot of the same shape, while its explosiveness makes it infinitely more destructive. For the modern shell does not explode when it first strikes the side or armor of an enemy's ship, but after it has pierced the side or armor and has exhausted its penetrative effect. The percussion fuse is in the base of the shell, and is exploded by a plunger driven against it by the force of the impact of the shell on striking. The time between the impact of the shell and its explosion is sufficient for it to have done its full penetrative work.
It first must be understood that all modern guns on ships-of-war are breech-loading and rifled, and that the smooth bore exists only as a relic, or to be brought out in an emergency for coast defense, when modern guns are not available. From the thirteen-inch down to the four-inch, the guns are designated by their caliber, the diameter of their bore, and the shot they throw, while from that to the one-pounder they take their name from the weight of the shot. Everything below the one-pounder is in the machine-gun class.
The base of rapid-fire work is the bringing together in one cartridge of the primer, powder, and shell. When the limit of weight of cartridge, easily handled by one man, is reached, the limit of rapid-fire action is also reached; and, although the quick-moving breech mechanisms have been applied abroad to guns of as large as eight-inch caliber, such guns would rank as quick, rather than rapid firing, and would require powder and shot to be loaded separately.
On the modern battleships the function of the great guns is the penetration of the enemy's armor, either at the waterline belt or on the turrets and gun positions, while that of the rapid-firers is the destruction of the unarmored parts or the disabling of the guns not armor protected. The six, three, and one-pounders direct their rain of shots at the turret portholes, gun shields, or unprotected parts of the ship, having also an eye to torpedo-boats, while from the fighting tops, the Gatlings rain a thousand shots a minute on any of the crew in exposed positions. With such a storm of large and small projectiles it would seem to be rather a question of who would be left alive rather than who would be killed.
The guns in use in the United States navy are the 13-inch, 12-inch, 10-inch, 8-inch, 6-inch, 5-inch, 4-inch, 6-pounders, 3-pounders, 1-pounder, Hotchkiss 37 mm. revolver cannon, and the machine guns. In the following table is given the length and weight of these guns, as well as of the shell they carry:
Length Powder weight
of gun, charge, of shell,
GUNS. feet. pounds. pounds.
One-pounder 5.1 .3 1
Three-pounder 7.3 1.7 3
Six-pounder 8.9 3.0 6
Fourteen-pounder 11.6 8.0 14
Four-inch 13.7 14.0 33
Five-inch 17.4 30.0 50
Six-inch 21.3 50.0 100
Eight-inch 28.7 115.0 250
Ten-inch 31.2 240.0 500
Twelve-inch 36.8 425.0 850
Thirteen-inch 40.0 550.0 1,100
HOW THE BIG GUNS ARE USED.
The 14-pounder, although not included in the navy armament, is given for the purpose of comparison, since it is with guns of this caliber that some of the Spanish torpedo-boat destroyers are armed. The largest gun as yet mounted on our largest torpedo-boats is the 6-pounder, while a single 1-pounder is the gun armament of the ordinary torpedo-boat. The Hotchkiss revolver cannon is not given in the table because its caliber, etc., is the same as that of the 1-pounder, and, in fact, the latter has superseded it in the latest armaments, so that it is now found only on the older ships of the modern fleet. The machine guns are not given because their effective work is practically the same. The Gatling is of 45-caliber, and uses the government ammunition for the Springfield rifle.