Direct labor requirements for removal and replacement of shafts, propellers and rudders on U.S. Navy ships at the Long Beach, Calif., Naval Shipyard have been reduced some 80 percent by the use of a new rigging technique. The Elpar Mobile Precision System, operated in the drydock, consists of two high-platform trucks, and a pallet which is symmetrically constructed and allows truck platform entry from any of four sides. The pallet's 120 in. square horizontal surface is divided into identical halves. Each section has a movable plane that occupies 1/8 of the total horizontal surface. Each section and plane may be controlled individually or in unison. Control is left-right and/or forward-reverse. Two telescoping uprights attached to each section lift the pallet. A hydraulic cylinder inside the upright provides vertical movements to the mounting plate, on which interchangeable component-carrying arms are attached. Details are given for the trucks, and the procedures used in removing propellers, shafts and rudders are described.

  • Availability:
  • Corporate Authors:

    Simmons-Boardman Publishing Corporation

    30 Church Street
    New York, NY  United States  10007
  • Publication Date: 1970-7

Media Info

  • Pagination: p. 62-63
  • Serial:
    • Marine Engineering/Log
    • Volume: 75
    • Issue Number: 8
    • Publisher: New York: Simmons-Boardman Publishing Corp.
    • ISSN: 0732-5460

Subject/Index Terms

Filing Info

  • Accession Number: 00019139
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Oct 29 1971 12:00AM