Transactions of the Society of Naval Architects and Marine Engineers Volume 11

Transactions of the Society of Naval Architects and Marine Engineers Volume 11

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...small weights is readily found through the division of the given weight by the tons per inch immersion at the existing draught, and then the original figure may be increased or reduced by this amount to give the final condition with considerable accuracy. A knowledge of the position of the transverse metacenter is an absolute necessity in the determination of the vertical position of the center of gravity of the weights of lading placed in the vessel, as this center, when combined with that of the weight of the vessel, must fall a certain distance below the metacenter to give a satisfactory initial stability at sea. In trimming the vessel to give an alteration in draught which will allow the passage over a dock sill, or some similar obstruction, the curve of centers of gravity of water planes is used to determine the point about which the vessel turns under the trimming moment created by shifting a weight on board, the amount shown to be required by the curve of moments to alter trim. Should it be necessary to place a weight of moderate amount on board a vessel in such a position as to avoid changing the trim, this curve of centers of gravity of water planes is again of use, as the center of gravity of the plane at which the vessel is floating is, approximately, the center of gravity of the added layer of displacement and, therefore, is the point over which the weight must be placed; if this weight, however, is of considerable amount, and the layer of additional displacement correspondingly thick, the center of gravity of the plane in the middle of the layer may be taken as the position of the weight with wholly satisfactory results. The last of these curves noted, that recording the areas of the wetted surface, is of value in this...show more

Product details

  • Paperback
  • 189 x 246 x 8mm | 263g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236980727
  • 9781236980724