Tangent. See [Gunnery].
Tangent scale.—·21 of an inch is the tangent of 1 degree to every foot of a gun’s length, from the base ring to the swell of the muzzle: Therefore, if the distance in feet, between these two points be multiplied by ·21, the product will be the tangent of 1 degree; from which the dispart being subtracted, will give the length of the tangent scale above the base ring for one degree of elevation for that particular gun. If the scale is to be applied to the quarter sight of the gun, of course the dispart need not be subtracted.
Tangent of one degree to the following British ordnance.
| Length. | Tangent, 1°. | Dispart. | |||||
|---|---|---|---|---|---|---|---|
| Ft. | In. | In. | In. | ||||
| 12 pr. medium | 6 | 6 | 1 | ·365 | 1 | ·475 | |
| 12 pr. light | 5 | — | 1 | ·05 | 1 | · | |
| 6 pr. heavy | 7 | — | 1 | ·47 | 1 | ·32 | |
| 6 pr. light | 5 | — | 1 | ·05 | 1 | · | |
| 3 pr. heavy | 6 | — | 1 | ·26 | 1 | ·08 | |
| 10 inch howitzer | 3 | 11 | ¹⁄₂ | ·84 | — | ||
| 8 do. howitzer | 3 | 1 | ·64 | — | |||
| 5¹⁄₂ do. light | 2 | 2 | ³⁄₄ | ·47 | — | ||
| 4²⁄₅ do. | 1 | 10 | ·384 | — | |||
Tangent of one degree to the following French guns.
| Kind. | Siege. | Field. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tangent of 1°. | Dispart. | Tangent of 1°. | Dispart. | |||||||||
| in. | li. | p. | in. | li. | p. | in. | li. | p. | in. | li. | p. | |
| 24 pr. | 2 | 1 | 5 | 1 | 2 | 4 | — | — | ||||
| 16 — | 2 | - | - | 1 | 1 | - | — | — | ||||
| 12 — | 1 | 10 | 6 | 1 | - | - | 1 | 4 | - | 1 | 3 | 2 |
| 8 — | 1 | 8 | 3 | 1 | - | - | 1 | 2 | ¹⁄₂ | 1 | 2 | - |
| 4 — | — | — | 1 | - | - | 1 | - | - | ||||
| 6 in. how’r. | — | — | 0 | 5 | 6 | — | ||||||
As the French tangent scales are marked off in inches and lines, the above dimensions are given in the same, for the more ready turning the French elevations into degrees, and thereby comparing their ranges with the English.
TANK, Ind. A pond or pool of water. A reservoir to preserve the water that falls in the rainy season.
TANNADAR, Ind. A commander of a small fort, or custom house.
TAP. A gentle blow, as a tap of the drum.