合成繊維索とマニラロープの耐用標準について : 日本丸における帆装索具使用実績から

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Synthetic fiber rope has recently taken the place of manila rope on board the sail training ship "NIPPON MARU" as sailing gears, because of its light weight, easy handling in rain and low-price advantages. We have experimented with the remaining strength of two kinds of Polypropylene ropes and manila rope after using one year or more as braces and halyards. P mono (mono-filament one) P mult (multi-filament one) The results are as follows. 1) P mult and P mono are excellent as halyards 2) P mult is better than the others as braces. 3) We may use P mult and P mono as sailing gears about two or two and half years which is about the same life of the manila ropes. 4) We must take care of the elongation of above synthetic fiber ropes for the safety of works and must not use them as gunt lines, cat falls, boat falls and so on.
社団法人日本航海学会の論文
1979-02-20