This paper supports the thesis that the new self-unloading vessels are a vital link in a modern transportation system and must be predisposed in design to automation, reliability and flexibility. The basic unloading configurations of Belt, Wheel and Screw that dominate today's self-unloaders are discussed from the viewpoint of history, transition and recent application. The Belt, as a century-old device, is a standard workhorse system that has evolved to a current state of sophistication. The feat of Wheel unloading technology was successfully orginated only in this century and is applied today in the most recent 1,000 foot vessels for Great Lakes use. The MV Stewart J. Cort typifies this concept and is the ultimate in standard for new construction. The Screw unloading system is advantegeously presented as being conducive and viable for overcoming problems of arching and bridging. Its principles are manifest in the ORBA Parascrew, the first screw concept for marine application, which are presented at length.

  • Supplemental Notes:
    • Presented at the Spring Meeting of SNAME, Vancouver, B.C., Canada, May 14-17, 1975.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Yu, A T
    • White, G R
  • Publication Date: 1975-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00095548
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Files: TRIS
  • Created Date: May 29 1975 12:00AM