Plastic Coated Wire - Deciding on the Best Strategy
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작성자 Rachelle Conti 작성일25-07-22 04:06 조회2회 댓글0건본문
As regards rapidity of aimed fire-and no taking pictures is price consideration which is not aimed-a lot relies on the quickness with which the gun may be opened, loaded and closed once more ready for firing, plastic coated wire but fairly as a lot depends on the benefit and comfort of transferring to any required direction the gun with its mounting; also on the system of recoil adopted and the strategy of sighting. The entire of the mechanism then rotates around the hinge pin and leaves the breech open ready for loading. In the bigger varieties of all breech mechanisms ball bearings are employed in various parts, such as the hinge pin bearings, &c., to reduce friction and in most of the modern heavy guns on board ship the breech mechanism is organized to be labored by a hydraulic cylinder placed on the breech face, or by a small hydraulic engine or electric motor placed in some handy position on the mounting. For 6-in. and 4-in. guns a shot help is connected to the breech face which is operated by the breech mechanism so that when the breech is open the shot support is in position for loading, and it falls out of the way when the breech is being closed.
In the older types the lock or its substitute was manipulated by hand, and with electric firing the wires from the tubes were joined up to the loose ends of the firing circuit; security depended therefore on all the pieces being so as and all operations appropriately performed. Because the breech screw threads are being disengaged the electric or percussion lock W is operated by a cam groove in a similar method to that already described. 5-in. and 14-in. calibre had been being made. It appears, due to this fact, that the balance of advantages is definitely in favour of the de Bange system, for all guns besides these of small calibre. The concept has developed from the use of such cartridges in small arms, and bigger cartridges of the identical kind were launched for 3-pounder and 6-pounder guns by Hotchkiss and Nordenfelt concerning the 12 months 1880 for the aim of fast firing in opposition to torpedo boats.
7-in. calibre with the powder charge contained in metallic cases, and about 1888 a 6-in. 100-pounder gun utilizing related cartridges. The use of fashionable smokeless powder renders them and comparable devices, such because the Broadwell ring (fig. 49), &c., peculiarly liable to wreck, as a slight abrasion of the lip of the cup or ring, or of its seating, allows gasoline to flee, and so accentuates the defect with every spherical fired. When the gun was fired, the gasoline pressure expanded the cup ring and compelled it into shut bearing against the seating in the gun and the thick steel plate on the breech screw, thus preventing any escape of fuel. The pad so made is then positioned on the front of the breech screw B, and it's protected on its faces by disks C, C, of metallic tin or copper having steel wedge rings on the outer edges; the circumference of the complete pad and disks is mostly only slightly coned and suits into a corresponding seating formed at the breech finish of the chamber, the canvas of the circumference of the pad being in immediate contact with the seat. They're contrived so as to be capable of firing both electric and percussion tubes, but others are organized for firing solely electric, separate locks being employed for use with percussion tubes.
In entrance of the pad is placed a robust steel disk formed with a spindle, and referred to as a mushroom head D, the spindle passing via the outlet in the pad and via the breech screw, being secured in rear by a nut. The flame is due to the large amount of extremely heated carbonic oxide remaining within the gun from the explosion of the cost; this mixing with the oxygen of the air when the breech is opened burns quickly as a sheet of flame in rear of the gun, and will wind be blowing down the gun the motion is more intense. While the strange varieties of plastic obturators final for an indefinite time a cartridge case can be utilized for a restricted number of rounds only, depending on the calibre of the gun; with subject guns from ten to twenty rounds or even more could also be fired from one case if care is taken to reform it after each round; with massive guns they will not, in fact, fire so many.
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