. The railroad and engineering journal . ns per square inch, with 15 percent, extension and an elastic limit of tons per squareinch. The standard thus indicated has, however, in allcases been greatly exceeded. The five guns in questionare as follows : i. The cm. ( in.) gun, 23 caliberslong ; 2. The cm. ( in.) gun, 24 calibers long ; cm. ( in.) gun, 30 calibers long ; 4. The acted on by the flat spring t. It may be fired by a lanyard,which draws back the trigger and releases the special levers fitted on. The piece is worked by two men. One lay
. The railroad and engineering journal . ns per square inch, with 15 percent, extension and an elastic limit of tons per squareinch. The standard thus indicated has, however, in allcases been greatly exceeded. The five guns in questionare as follows : i. The cm. ( in.) gun, 23 caliberslong ; 2. The cm. ( in.) gun, 24 calibers long ; cm. ( in.) gun, 30 calibers long ; 4. The acted on by the flat spring t. It may be fired by a lanyard,which draws back the trigger and releases the special levers fitted on. The piece is worked by two men. One lays, loads andfires, and one hands the ammunition. The gun is in eachcase made in two parts of forged crucible steel, the barreland the breech-piece, which is screwed on to it, forming 154 THE RAILROAD AND [April, 1R90. a jacket. Figs. 4, 5. 6 and 7 show the longest , the fourth gun of those we have enumerated, whichappears to be the best to take as an example. The is a comparatively short piece. The total length of. t-^ -^^ -s. v^x ^^^---^^Sijiii; Fig. 8. the barrel of this gun is in. The rifling con-sists of 24 grooves of the section shown in fig. 7. Thetwist is right-handed, increasing from i in 165 to i in 30calibers. The entire gun is in. long. The diameterof the powder chamber is in., that of the bore • The gun weighs lbs., or with lbs. The charge is lbs. The shell weighs 4
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
