Evaluation of a Power-Augmented-Ram Wing Operating Free in Heave and Pitch over Water

Abstract

An investigation was conducted at the David W. Taylor Naval Ship Research and Development Center Carriage III Facility to determine performance characteristics of a power-augmented-ram wing-in-ground-effect vehicle. The model was the first statically stable vehicle to be operated free in heave and pitch with excess thrust. The power-augmented-ram vehicle successfully accomplished a static takeoff at the extremely low thrust-to-weight ratio of 0. 173. The model was able to accelerate through hump at a vehicle density of 2 lb/ cu ft (32 kg/cu m); this is a higher density than in any previous test. Trimming moments were supplied by one of several aerodynamic/hydrodynamic control surfaces. The best performance was obtained using a large 40-deg deadrise, 'V' shaped, planing tail.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1977
Accession Number
ADA045428

Entities

People

  • David W Taylor
  • Fred H. Krause

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Airfoils
  • Control Surfaces
  • Control Systems
  • Digital Data
  • Ground Effect
  • Ground Effect Machines
  • Horizontal Stabilizers
  • Hydrodynamic Control Surfaces
  • Leading Edges
  • Measurement
  • Operating Systems
  • Plastic Explosives
  • Propulsion Systems
  • Surface Effect Vehicles
  • Test And Evaluation
  • Two Dimensional

Readers

  • Aerodynamics/Aeronautics.
  • Fluid Dynamics.
  • Marine Hydrodynamics