THE DOMINANT AERODYNAMIC CHARACTERISTICS OF A SHAPED GEM

Abstract

The effects of aerodynamic forces and moments acting on a ground effect machine in forward flight are investigated in some detail. Emphasis is placed upon the performance gains possible by shaping a GEM to maximize lift at zero degrees angle of attack. The associated longitudinal stability and trim problem is discussed, and at least one solution presented. The work is both theoretical and experimental, the latter utilizing wind-tunnel models of a reconfigured P-GEM and also the full-scale P-GEM. Flight test results prove the validity of the concept and are extrapolated to higher airspeeds than those attainable with the P-GEM.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1964
Accession Number
AD0608522

Entities

People

  • A. F. Wojciechowicz Jr.
  • T. E. Sweeney
  • W. B. Nixon

Organizations

  • Princeton University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aerodynamic Configurations
  • Aerodynamic Forces
  • Aerodynamic Lift
  • Aircrafts
  • Base Pressure
  • Drag
  • Dynamic Pressure
  • Fluid Dynamics
  • Ground Effect
  • Ground Effect Machines
  • Pressure Distribution
  • Static Pressure
  • Three Dimensional
  • Wind Tunnel Models
  • Wind Tunnel Tests
  • Wind Tunnels

Readers

  • Aerodynamics/Aeronautics.
  • Theoretical Analysis.