The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . 0 lb to more than fivetimes that weight, and no boundary line can be assigned whichwill separate these field equipments from those of the light unitsof a siege train It will be convenient to consider in turn thethree natures of ordnance (guns, howitzers and mortars) employedand to quote some typical instances of each kind The United States 00 pr. Gun.—This gun and its equipment areot modern type (1904) Its general appearance is shown in figs. 69_ and 70, Plate V. The calibre is 4-7; the charge 594
The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . 0 lb to more than fivetimes that weight, and no boundary line can be assigned whichwill separate these field equipments from those of the light unitsof a siege train It will be convenient to consider in turn thethree natures of ordnance (guns, howitzers and mortars) employedand to quote some typical instances of each kind The United States 00 pr. Gun.—This gun and its equipment areot modern type (1904) Its general appearance is shown in figs. 69_ and 70, Plate V. The calibre is 4-7; the charge 594 lb of smokeless powder and the muzzle velocity developedis 1700 Fixed ammunition is employed, and with an elevationof 15° the range is 7600 yds The weight of the equipment limberedup is given as 715 cwt.: it is known as a siege gun In its general aspect the carriage resembles a field carriage, but ofstronger type, with a special arrangement of cradle. In fig. 71 two sections are given; the cradle, it will be seen,consists of three cylinders (seen in section in the upper figure) which. From Lieut. •Colonel Onnond M. Us^ls Ordnance and 71.—Diagram of 47-in. Siege Gun, Traversing bracket, r, Rails. x, Axle. p, Pintle bearing. s. Spring cylinders, y. Pintle yoke. are bound together by broad steel bands; the two outer cylinderscarry rails r upon which the gun slides in recoil. The centre cylindercontains the hydraulic gear for checking recoil, the two outer containthe springs s. These springs are arranged in three con-centric columns, the front end of each outer column being con-nected to the rear end of the next inner column by a steel tube,flanged outwardly at the front end and inwardly at the rear rod carrying a head which acts on the inner coil only passesthrough the centre of the cylinder and is fixed to a yoke that isconnected with a lug at the breech of the gun. The flanged tubesthus convey the pressure from the innermost
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Keywords: ., bookcentury1900, bookdecade1910, bookidencyclopdiab, bookyear1910
