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 |
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.