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RBL 40 pounder Armstrong gun : ウィキペディア英語版 | RBL 40 pounder Armstrong gun
The Armstrong RBL 40 pounder gun was an early attempt to use William Armstrong's new and innovative breechloading mechanism for medium artillery. ==Design history==
The Armstrong "screw" breech had already proved successful in the RBL 12 pounder 8 cwt field gun, and the British Government requested it be implemented for heavier guns despite Armstrong's protests that the mechanism was unsuited to heavy guns.〔Ruffell, The Armstrong Gun Part 5: British revert to Muzzle Loading〕 The first version weighed 32 cwt, followed by the 35 cwt version which introduced a longer and stronger breech-piece.〔Treatise on Manufacture of Service Ordnance, 1877〕
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