Iron-Cased Ships; A Series of Lectures Delivered Before the Royal United Service Institution

Iron-Cased Ships; A Series of Lectures Delivered Before the Royal United Service Institution

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1861 edition. Excerpt: ...iron, cono-cylindrical, 100 lbs.--Struck the left-hand corner of No. 6 target near the top. Bulge of plate, 2J inches; penetration, If inch; total, 4f. Fractured the plate through its whole depth in a line with the angle of the port next abaft the blow. Three bolts around the point of impact projected 1 inch through the plate; but the bolts themselves were not started. Shot did not lodge. 3rd shot, homogeneous metal, cylindrical, 80 lbs.; length, 8f inches.--Struck to the right and over the bull's eye of No. 7 target, entering the joint between the plates until the base of the shot arrived at their inner side, where it stuck fast in the timbers. About one-third of this shot struck the plate above the joint, and two-thirds the plate below it; the upper plate, yielding in the line of least resistance, opened at the joint of an inch. The shorter bolt of those specimens on the table was struck by this shot, which followed the bolt as it were, and exhibited on its own surface a projection of near half an inch where it had entered the bolt-hole. But I will here draw attention to the effects of impact on all the bolts exhibited, as having an important bearing on this mode of fastening armour plates. It will be seen that the swell or " set up" of the bolt when struck does not take place in the coned head which has been driven with force into the corresponding bolt-hole of the plate itself; but it takes place in the part of the bolt in the timber beyond the plate, and the swell or "set up" thus acts to harden the hold of the bolt in the timber. This appears to account for only one instance having occurred in which a bolt was detached, so as in any way to represent a splinter, which took place in the case of the 10th shot of the first day, the more

Product details

  • Paperback | 74 pages
  • 189 x 246 x 4mm | 150g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236676955
  • 9781236676955