The paper analyzes methods of steering and reversing of conventional water jet propulsion systems, followed by an explanation of a new steering and reversing system that has significant advantages. The combined deflector system of dual concentrically, vertically pivoted deflectors form a steering nozzle when rotated in unison. Reverse is obtained by rotating the deflectors in opposing direction until the nozzle opening is fully closed; the water now discharges forward through reverse passages built into the lower part of the deflectors; the size and weight of these deflectors are a magnitude lower than conventional systems; the deflector position is controlled by means of 2 shielded rods, each connected to a deflector half; these rods are activated by hydraulic cylinders, placed inside the vessel via a mechanism that precisely controls the movement of the deflector halves; the control rods retract fully when the engine is shut off to protect sealing surfaces; helm and reverse position feed-back occurs from within the vessel; all hydraulic and feed-back cable hull penetrations and cylinder rod exposure to marine growth have been eliminated; the deflectors may be equipped with steering vanes to obtain better low speed manoeuvring as well as emergency steering while being towed; major improvements in safety and emergency handling capabilities are explained.

  • Supplemental Notes:
    • Intl Symposium on Waterjet Propulsion Latest Developments; 1-2 Dec 1994; London, UK. Pprs. Publ by RINA, London, UK. Ppr 8 [15 p, 12 fig]
  • Authors:
    • Roos, P W
  • Publication Date: 1994


  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00710869
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Aug 14 1995 12:00AM