Developments within the diesel engine and associated marine reduction gear industries have created a need for a radical evaluation of the torsionally flexible coupling fitted between them to provide a general solution of the requirements for the series producers in either industry (generally considered to be <2000HP I 1800 rev/min). This paper briefly presents the diesel application engineers philosophies for the two traditional solutions based upon rubber-in-compression and rubber-in-shear, discussing the merits and liabilities of each solution, and in doing so, develops the design goals for the torsionally flexible coupling presented in this paper. In order that the coupling is universally applicable to the whole industry, the paper briefly outlines the design versatility and ease of refurbishment.

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