. American engineer and railroad journal . THE LUNKKN GATE BREECH LOADING RIFLE MORTARS. We present an engraving taken from a photograph of the12-in. breech-loading rifle mortars built by the Builders IronFoundry, of Providence, K. I., and shown as they were laidout on the Hoor of the shop. These mortars are made withcast-iron Itodies and two rows of steel hoops. The total lengthof the gun is in., the diameter outside of the hoopsbeing 42J in and weight 14i gross tons, or lbs. Theguns are a part of the system of coiist defense adopted by theUnited States Government i
. American engineer and railroad journal . THE LUNKKN GATE BREECH LOADING RIFLE MORTARS. We present an engraving taken from a photograph of the12-in. breech-loading rifle mortars built by the Builders IronFoundry, of Providence, K. I., and shown as they were laidout on the Hoor of the shop. These mortars are made withcast-iron Itodies and two rows of steel hoops. The total lengthof the gun is in., the diameter outside of the hoopsbeing 42J in and weight 14i gross tons, or lbs. Theguns are a part of the system of coiist defense adopted by theUnited States Government in liH8(i, and 73 of them have beenordered at a cost of about ^6011,001). Their general apjx-ar-ance bears a close resemblance to the steel breech-loading riflesmade by the Navy Department, with the exception of their 17,000 lbs. and a tensile strength of from 30,000 to square inch, or nearly double that of ordinary cast metal is melted in what is known as an air-furnace, andthe iron, being separated from the fuel,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
