Experimental Spindle Torque and Open-Water Performance of Two Skewed Controllable-Pitch Propellers

Abstract

Experimental results are presented on the spindle torque and open- water performance of two skewed controllable-pitch propellers. Both propellers have radial distributions of skew specified so that the section midchord is forward of the spindle axis at the inner radii and aft of the spindle axis at the outer radii. One propeller has no rake and the other has substantial forward rake. The experiments were conducted at steady conditions in uniform flow in a towing basin over a range of positive and negative pitch ratios and a range of positive and negative advance coefficients so that the complete maneuvering envelope of the ship was simulated in a quasi-steady manner. The experimental open-water performance was correlated with calculated values based on a least- squares fit to previous systematic experimental data.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1975
Accession Number
ADA025284

Entities

People

  • John J. Nelka
  • Richard D. Kader
  • Robert J. Boswell

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Aerodynamic Loading
  • Blades
  • Calibration
  • Controllable Pitch Propellers
  • Engineers
  • Experimental Data
  • Geometry
  • Instrumentation
  • Measurement
  • Model Basins
  • Naval Architecture
  • Propeller Hubs
  • Propellers
  • Propulsion Systems
  • Ship Model Basins
  • Simulations

Readers

  • Aerodynamics.