EXPERIMENTAL DETERMINATION OF SURFACE-PIERCING, FULLY VENTILATED HYDROFOIL STABILITY DERIVATIVES BY A FREE OSCILLATION TECHNIQUE

Abstract

The results of an experimental evaluation of the dynamic stability derivatives of surface-piercing, fully ventilated, dihedral hydrofoils are presented, including the effects of variation in speed, trim imm r ion, m ss, moment of inertia and frequency of oscillation. T E T R MA BY THE UNCOUPLED FREE OSCILLATION T C IQUE WIT EIT ER FR E O I EAVE OR PITCH. An analysis of the results is pres nte on the basis of quasi-steady theory, including the derivation ofA NEW EXPRESSION FOR THE PITCH DAMPING DERIVATIVE, AND IS SHOWN TO BE IN GOOD AGREEMENT WITH THEORETICAL PREDICTIONS. It is concluded that the qua i-steady theory will be adequate for all prototype designs of surf ce-piercing fully ventilated hydrofoils. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1962
Accession Number
AD0292967

Entities

People

  • Gerard Fridsma
  • P. Ward Brown

Organizations

  • Stevens Institute of Technology

Tags

DTIC Thesaurus Topics

  • Agreements
  • Frequency
  • Hydrofoils
  • Inertia
  • Moment Of Inertia
  • Oscillation
  • Prototypes
  • Test And Evaluation

Readers

  • Marine Hydrodynamics
  • Marine Propulsion Engineering and Naval Architecture
  • Snow Cover Descriptors for Reptiles and Their Illustrations.