On the Selection of the Block-Coefficient of Super Tanker

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  • スーパータンカーの肥瘠係数の選定について
  • スーパータンカー ノ ヒセキケイスウ ノ センテイ ニ ツイテ

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Abstract

Looking over the data of super tankers built for these few years, we can easily see that the block-coefficients of those vessels are larger than the usual values of ordinary cargo ships, but can not find any definite standard on it. To determine the most economical block-coefficient, we calculated initial costs and earning efficiencies for super tankers with large block-coefficients using the results of the tank tests which have been carried out at our request by the Transportation Technical Research Institute. Our conclusion is, in a word, that it is not advantageous to choose larger blockcoefficient than 0.80, especially from a stand-point of earning efficiency.

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