A Course of Instruction in Ordnance And Gunnery Compiled for the Use of the Cad
A Course of Instruction in Ordnance And Gunnery Compiled for the Use of the Cad
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One of the principal objects of traverses, on a terreplein, is to confine the bursting effects of shells within narrow limits. Mortar shells penetrate from half a yard to one yard in earth ; and the amount of SHRAPNEL FIRING. 465 earth thrown up by explosion is about one cubic yard for each pound of the bursting-charge. Ordinarily, the diameter of the crater at the top is two or three times the depth. The 13 -inch shell will often break in falling on a pavement* Roofs of good masonry, little mo...re than a yard thick, are sufficient to resist the penetration of mortar shells.
The effect of mortar-firing is generally in favor of the besiegers, as the works of the besieged present a larger and more favorable surface for the action of shells. About one-fifth of the shells fall inside of a demi-lune at a distance of 650 yards, and about one-third at a dis- tance of 450 yards. The line of fire should be taken in the direction of the greatest extent of the part to be shelled. The fire of mortars at sea is veiy uncertain, unless the object be very large.
What to read after A Course of Instruction in Ordnance And Gunnery Compiled for the Use of the Cad?
You can find similar books in the "Read Also" column, or choose other free books by James G James Gilchrist Benton to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
One of the principal objects of traverses, on a terreplein, is to confine the bursting effects of shells within narrow limits. Mortar shells penetrate from half a yard to one yard in earth ; and the amount of SHRAPNEL FIRING. 465 earth thrown up by explosion is about one cubic yard for each pound of the bursting-charge. Ordinarily, the diameter of the crater at the top is two or three times the depth. The 13 -inch shell will often break in falling on a pavement* Roofs of good masonry, little mo...re than a yard thick, are sufficient to resist the penetration of mortar shells.
The effect of mortar-firing is generally in favor of the besiegers, as the works of the besieged present a larger and more favorable surface for the action of shells. About one-fifth of the shells fall inside of a demi-lune at a distance of 650 yards, and about one-third at a dis- tance of 450 yards. The line of fire should be taken in the direction of the greatest extent of the part to be shelled. The fire of mortars at sea is veiy uncertain, unless the object be very large.
What to read after A Course of Instruction in Ordnance And Gunnery Compiled for the Use of the Cad?
You can find similar books in the "Read Also" column, or choose other free books by James G James Gilchrist Benton to read onlineMoreLess
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