. Notes on torpedoes, offensive and defensive. -Bottom 470 pounds, and its available buoyancy, that is to say5actual power of flotation, about 140 pounds. 300 andWfift hun0urnd ^ne &enera^ design and dimensions of the 250-pound casecase, construction are shown in section in Fig. 114. The body consists of A- and dimensions. ° ^ l inch best boiler-plate iron, riveted, with dished ends. Thesize and construction of the mouth-piece is similar to that Mf. 11*.. Sec&ow. of the 100 pound case, so that the fuses, &c, may be inter-changeable. The whole of the iron work should be paintedtwo co
. Notes on torpedoes, offensive and defensive. -Bottom 470 pounds, and its available buoyancy, that is to say5actual power of flotation, about 140 pounds. 300 andWfift hun0urnd ^ne &enera^ design and dimensions of the 250-pound casecase, construction are shown in section in Fig. 114. The body consists of A- and dimensions. ° ^ l inch best boiler-plate iron, riveted, with dished ends. Thesize and construction of the mouth-piece is similar to that Mf. 11*.. Sec&ow. of the 100 pound case, so that the fuses, &c, may be inter-changeable. The whole of the iron work should be paintedtwo coats, and tested to a pressure of 30 pounds on thesquare inch, gradually increasing from within. The moor-ing chains are attached by eyes to wrought-iron bands 301 shrunk on and screwed to the body by coupling screws, asshown in the figure. The charge of 250 pounds renders itapplicable for the destruction of a vessel without absolutecontact; it may, however, be necessary,in certain cases, toemploy it as a contact mine, and when used as such, awooden jacket, as shown in the figure, must be added toprotect the case from injury by collision with friendly ves-sels. Its calculated weight, complete with charge, and with-out the wooden jacket, is about 520 pounds, and its avail-able buoyancy, (actual power of flotation,) is about 80pounds. Fig. 115 shows a plan of the bottom of this case,including the wooden jacket. Fig, 115.
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherwashi, bookyear1872
