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Section of the double wedge sliding breechblock of a C64 field gun, an early breech-loading field gun. [13] The sliding breechblock consists of two opposed wedges. The screw mechanism moves the wedges relative to each other, to change the effective thickness of the breechblock. Expanding the block locks it in the closed position and seals the ...
Diagram of the horizontal sliding wedge. The German company Krupp in contrast, adopted "Horizontal sliding block" breeches, rather than screw breeches, for all artillery calibres up to 16 in (410 mm) naval guns. This was similar in some ways to the original "Armstrong screw"; the shot and powder cartridge were inserted through the open rear end ...
The 8.8 cm SK L/30 gun weighed 644 kilograms (1,420 lb) and had an overall length of about 2.64 meters (8 ft 8 in). It used the Krupp horizontal sliding block, or "wedge", as it is sometimes referred to, breech design. In addition to mounts for surface ships there was also a submarine version which was on either a retractable or fixed pivot mount.
Krupp used the approach to slide a wedge through the rear part of the gun, the so-called sliding wedge breech block. Up till 1864 the Krupp sliding wedge breech called simple breech had an almost square diameter, only the corners of the breech hole were a bit rounded. That year Krupp invented the cylindroprismatic (halbcylindrischen) type of ...
A falling-block action (also known as a sliding-block or dropping-block action) is a single-shot firearm action in which a solid metal breechblock slides vertically in grooves cut into the breech of the weapon and is actuated by a lever. [1]
Meanwhile, the Prussian Navy had a 15 cm gun with double wedge breech and a weight of 60 Zentners (3,000 kg) changed for an increased charge. [18] This gun was tested in Fall 1868. In detail, it was a massive cast steel breechloader of 3050 kg including the double wedge breech block. The length of bore was 2,084 mm.
Although designated as 28 cm (11 in), its actual caliber was 28.3 centimeters (11.1 in). It used Krupp's horizontal sliding-block, or "wedge", as it is sometimes referred to, breech design rather than the interrupted screw commonly used in heavy guns of other nations. This required that the propellant charge be loaded in a metal case (usually ...
The first variant of the gun, the M1975 (M stands for Model) had a semi-automatic horizontal sliding wedge type breech lock. The second variant, M1977, had a more practical vertical sliding wedge breech block. [1] The M1977 can be also used as a field gun at brigade level, as it has a maximum range of 20.6 kilometers.