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The Welin breech block was a revolutionary stepped, interrupted thread design for locking artillery breeches, invented by Axel Welin in 1889 or 1890. Shortly after, Vickers acquired the British patents. Welin breech blocks provide obturation for artillery pieces which use separate loading bagged charges and projectiles. In this system the ...
It weighed 102,000 kilograms (224,872 lb), including the Welin-type breech. This used the Elswick three-motion short-arm mechanism, much like the British BL 18 inch Mk I naval gun designed around the same time. Chamber volume was 467.11 litres (28,505 cu in). [1] Rear view of the gun on display at the Yamato Museum
Axel Welin solved this problem with his stepped interrupted screw design: the Welin breech block of 1890. This design has threads of the block and breech cut in steps of successively larger radius. For example, this allows a breechblock with four steps to allow four-fifths of the block circumference to be threaded, allowing for a much shorter ...
"Third year type" refers to the Welin breech block on this gun. Breech-block design began in 1914, the third year of the Taishō period. This breech-block design was also used on Japanese 40 cm (16 inch), 20 cm (8 inch), 15.5 cm (6 inch), 12.7 cm (5 inch), and 12 cm (4.7 inch) naval guns. [2] This gun was not mounted aboard submarines.
Large caliber breech-loading artillery became practical with French development of the obturator by Charles Ragon de Bange in 1872; and speed of reloading was improved by adaptation of the interrupted screw breech plug, which was later further improved by Axel Welin in 1890 as the Welin breech block and adopted by the Swedish. [2]
Each day, two Connect blocks roll off the line, as the factory continues to ramp up production. The factory needs 147 workers to fully operate a shift, up from120 now. "We're still scaling up," he ...
All guns employed a Welin breech block and used a Smith-Asbury mechanism, and, in the case of the Mark 12, chromium plating was introduced to prolong barrel life. These improvements enabled the guns to fire heavier 1,500 lb (680 kg) shells, and increasing the gun mount elevation to 30 degrees [ 2 ] extended the range of the guns to 36,000 yd ...
He was married to Agnes Welin from 1889. Axel Welin studied at the Royal Institute of Technology in Stockholm from 1879 to 1884. Between 1886 and 1888, Welin worked as a weapons designer for Thorsten Nordenfelt in London. In 1889 he started his own engineering firm, the Welin Davit & Engineering Company Ltd. He soon designed the famed Welin Breech.