To provide directional thrust to the Mohole drilling vessel it is intended to install steering propellers at the base of each of the six columns. These propellers will be driven by 750 horse-power direct current motors and will be free to rotate through 360 degrees. There are many factors which must be considered in the installation design for these six propulsive units. These include hydrodynamic operating efficiency, access for servicing and maintenance, ease of replacement, simplicity of operation, and reasonable cost. They must be unaffected by motion of the platform in a seaway and their removal must not adversely affect either the static or dynamic stability of the vessel. This report discusses in a general way the consideration which has been given to these many factors and the conclusions which have been reached are exemplified in a preliminary design of the propulsive unit installation and retraction system. (Author)


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    Title :

    Project Mohole Preliminary Design of Retraction System for Steering Propulsion Units


    Contributors:
    J. D. Dyal (author)

    Publication date :

    1963


    Size :

    16 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English