EXPERIMENTAL STUDIES OF THE AERODYNAMICS OF GROUND EFFECT MACHINES

Abstract

The results are presented of a series of experiments conducted to investigate the basic aerodynamics of ground effect machines. Two-dimensional model tests and full scale tests of the Tinajero ground effect machine were made. The flow patterns and pressure distributions around a vehicle at various flight conditions were investigated and the effects of nose shape on these patterns was determined. It was found that nose shape had no significant effect on the cushion under the vehicle, but does have an effect on the basic external aerodynamic coefficients. Sketches of typical flow patterns, typical pressure distribution, and aerodynamic coefficients around critical points are presented. Pressure distributions under the vehicle, static stability curves, dynamic damping coefficients, and some aerodynamic coefficients are presented. The machine was found to be basically unstable in yaw and the controls were ineffective. The directional stability problem prohibited a complete investigation at forward speeds.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1962
Accession Number
AD0294902

Entities

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Air Platforms
  • Autonomy
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Boundary Layer
  • Center Of Gravity
  • Contracts
  • Control Systems
  • Dynamic Pressure
  • Engineers
  • Flow Visualization
  • Governments
  • Ground Effect
  • Ground Effect Machines
  • Measurement
  • Model Tests
  • Pressure Distribution
  • Two Dimensional
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Engineering

Readers

  • Aerodynamics/Aeronautics.
  • Neural Network Machine Learning.