Tunnel Wedge.

Abstract

A full or partial tunnel wedge is positioned in the propeller shaft tunnel aft of the propeller on a waterborne craft. The size and angle of the wedge is determined by the characteristics of the particular craft. The wedge converges water flow and increases water pressure aft of the propeller. The higher water pressure increases the propeller thrust and reduces the hull drag of the propeller shaft tunnel thus reducing the shaft horsepower required to maintain a given speed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 20, 1980
Accession Number
ADD008457

Entities

People

  • Donald W. Hankley

Organizations

  • United States Department of the Navy

Tags

DTIC Thesaurus Topics

  • Engineering
  • Flow
  • Horsepower
  • Mechanical Engineering
  • Propeller Components
  • Propeller Shafts
  • Propellers
  • Propulsion Systems
  • Water Flow
  • Waterborne

Readers

  • Aerodynamics.
  • Fluid Dynamics.
  • Naval Architecture and Marine Engineering.