Modified Specifications for Triple Expansion Twin-Screw Propelling Machinery for U.S.S. San Francisco (Cruiser No. 5) of 4,083 Tons Displacement and 19 Knots Speed

Modified Specifications for Triple Expansion Twin-Screw Propelling Machinery for U.S.S. San Francisco (Cruiser No. 5) of 4,083 Tons Displacement and 19 Knots Speed

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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. 1888 edition. Excerpt: ...16 B. W. G. The vapor-pipe will lead up the engine-room hatch and discharge above the level of the awnings, where it will have a suitable hood; or it may be led into the main escape-pipes. Each feed-pump suction will be provided with a valve operated by a copper float in the feedtank, so arranged that it will allow no air to enter the feedpipes. There will be a small supplementary feed-tank in the after engine-room above the level of the air-pump, into which the air-pump will discharge. From this tank a 6-inch vaporpipe will lead as specified for the forward compartment, and a 4-inch water-pipe will lead to feed-tank in forward engineroom. The main feed-tank will form a support for the forward end of forward condenser. BOILERS. There will be four cylindrical, double-ended, horizontal return-tube boilers 14 feet 8 inches greatest diameter and 19 feet 2 inches mean length over heads. Each boiler will have three corrugated furnaces 42 inches in least internal diameter. The boilers will be divided into two groups, each in a separate water-tight compartment. BOILER MATERIAL. All material used in the construction of the boilers, except the tubes, rivets and circulating-plates, is to be open-hearth steel. The tubes are to be of wrought-iron or steel of the best quality. The rivets to be of either open-hearth or ClappGriffiths' steel. All material is to be tested as elsewhere specified. BOILER-SHELLS. The shell of each boiler will be inches thick, made in three rings, each ring of three plates. BOILER-HEADS. Each head of each boiler is to be made of three plates; the upper plate 1 inches thick, the middle plate forming the front tube-sheet will be inch thick, and the lower plate jr inch thick. The lower plates of front heads to be flanged inwardly at...show more

Product details

  • Paperback | 32 pages
  • 189 x 246 x 2mm | 77g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236580516
  • 9781236580511