MOTIONS AND TANK LOADS IN WAVES FOR AN EXTENDED PERFORMANCE HYDROFOIL WITH A SUBMERGED BUOYANCY/FUEL TANK

Seakeeping experiments in calm water and regular and random waves have been conducted on a model of the PHM hydrofoil outfitted with a large buoyancy fuel tank (lower hull). The self-propelled model was equipped with an automatic control system that actuated the hydrofoil flaps to minimize motions. It also incorporated manual steering control of the forward strut, aft rudder and aft flaps for coordinated maneuvers. Measurements were made of motions, accelerations, forces on the tank, and control surface position in the foilborne mode. Mean, significant and maximum values of measured variables are provided in this report, as are tranfser functions of motions. It is determined that maximum yaw moment on the tank (which greatly affects strut attachment requirements and strut bending) occurs at a heading close to beam seas. Sudden changes in heading also result in large loads. The tank provides a bow up moment that should assist takeoff and permit the vessel to maintain a favorable attitude underway.

  • Supplemental Notes:
    • Report; DTIC distribution restrictions apply
  • Corporate Authors:

    David Taylor Naval Ship R&D Center

    Development Center
    Bethesda, MD  United States  20084
  • Authors:
    • Gersten, A
  • Publication Date: 1980-5

Media Info

  • Features: References;
  • Pagination: 75 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00660964
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Report/Paper Numbers: DTNSRDC/SPD-0942-01
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM