4100 | 14 | 31 | 4 | 774 4200 | 15 | 9 | 4 | 766 4300 | 15 | 47 | 4 | 758 4400 | 16 | 26 | 3 | 750 4500 | 17 | 5 | 3 | 743 ------+------+------+-----------+--------- CHAPTER III. 3.6-inch Rifle, etc. 3.6-inch Mortar, etc. Weights and Dimensions of Foreign Artillery. 3.6.-INCH B. L. RIFLE, MODEL 1891 (REVISED). Material steel Total length 7.79 feet Calibre 3.6 inches Weight 1181 pounds Grooves 26 Twist of rifling { 1 turn in 50 to { 1 turn in 25 calibers Axis of trunnions above ground 3.56 feet Powder-chamber cylindrical Vent axial Preponderance 31 pounds Muzzle velocity 1550 ft.-sec. Maximum range for shrapnel 7420 yards [Illustration: FIG. 49.] This gun is similar in construction to the 3.2-inch (revised November 11, 1892). NOMENCLATURE.--_ab_, locking-shoulder and recess; _c_, conical gas-check seat; _d_, cylindrical powder-chamber; _e_, connecting slope for seat of rotary band; _f_, slope from no lands to maximum lands. SIGHTS. Similar to those of 3.2-inch gun. AMMUNITION AND FUZES. The ammunition differs only in weight and dimensions from that described for the 3.2-inch gun. Fuzes are the same. Powder-charge 4.1875 pounds U. F. sphero-hex. Weight of shell, filled 20 pounds Bursting-charge, shell 14½ ounces Weight of shrapnel, complete 20 pounds Bursting-charge, shrapnel 4 ounces Total number of balls 218 Total number of individual pieces 280 CARRIAGES, LIMBERS, CAISSONS, COMBINED BATTERY-WAGON AND FORGE, ARTILLERY-WAGON.