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A sliding block is common in artillery. A vertical sliding block rises and falls while a horizontal sliding block slides to one side. It is a strong design. The breechblock is well supported by the receiver within which it slides and the mechanisms for opening and closing the breech do not have to act to any extent against the forces generated ...
A metal cup on the front of the block, together with the pressure of the screw behind it, provided "obturation" and sealed the breech to prevent escape of gasses rearward on firing. The sliding-block was known as the "vent-piece", as the vent tube was inserted through it to fire the gun. In modern terms it was a vertical sliding-block.
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]
In a falling block or sliding block action, a solid metal breechblock "slides" vertically in grooves cut into the breech of the firearm and actuated by a lever. Examples of firearms using the falling-block action are the Sharps rifle and Ruger No. 1 .
The mechanism of the lock is fixed in the breech block, which consists of the ordinary main-spring acting upon a tumbler by a swivel. The tumbler and striker are made in one piece; the scear and trigger are also in one piece . By depressing the lever the breech block is brought down, the cartridge-case extracted and the rifle is cocked.
These guns succeeded the similar World War I-era BL 4.7 inch gun, changing the cartridges from BL silk bags to separate QF in brass cases and a new horizontal sliding-block breech mechanism. Mark IX was deployed in single mountings CP Mk XIV on the A-class destroyers of 1930 and on most subsequent destroyer classes up to and including the R ...
A QF gun fires metallic-cased ammunition, generally with the shell fixed to it, as a single unit, just like a firearm cartridge. This allows a simpler breech mechanism, such as a sliding block breech, which when coupled with the easier ammunition handling and ramming procedures, allows a much higher rate of fire.
The gun had an early form of horizontal sliding-block breech and it fired separate-loading, bagged charges and projectiles. [1] The advantage the Versuchmörser 06 had over its predecessor the 21 cm Mörser 99 was its recoil mechanism raised its rate of fire from one round every three minutes to one round per minute. The 21 cm Mörser 99 ...