Inhaltsangabe
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. 1879. Excerpt: ... CHAPTER XIV.-« THE latest trials (July 1879), to decide on the best turret armour for H.M.S. "Inflexible," have resulted in the compound armour-plate coming out of a very trying ordeal, with the most favourable results. This compound system consists in having a rolled plate, half of its thickness being iron, the remainder of steel--forming a hard, shot-resisting face. The plate tested was a portion of one originally 22 feet in length by 8 feet, manufactured by Messrs. Cammell and Company, of Sheffield, and rolled down till there was a thickness of 3J inches of steel upon 5J inches of iron. The total thickness being just half of what the original turret armour was to have been, thereby making a considerable saving in weight. Three shots were fired at the plate, which was 8 feet 4 inches by 6 feet broad, at a range of 30 feet, from a 12-ton 9-inch gun, the charge being 50 lbs., and the projectile, a Palliser chilled shot, weighing 250 lbs. The shots were completely broken up, and none of the fine cracks extended to the iron backing. A steel twin-screw double-turreted ship, to be called the " Colossus," has just been commenced at steel torpedo ram, to be called the " Polyphemus"; dimensions: 240 feet between perpendiculars, 40 feet extreme breadth, with a load draft of 20 feet, and a displacement of 2,640 tons. The design is novel, the small part above water being convex, and her midship section closely resembling a peg-top. Her frames are of Bessemer steel, and the bottom plating of Siemens-Martin steel, from the Landore works. She will be propelled by twin-screws, and two pair of high-pressure compound horizontal engines by Messrs. Humphrey and Tennant. High-pressure cylinders will be 38 inches in diameter, and the lowpressure 64 inches, stroke 45 inc...
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