Subsonic Aerodynamic Stabilization of Long, Low-Drag Bodies of Revolution Using Boattail Fins

Abstract

Subsonic three-degree-of-freedom wind tunnel tests were utilized to demonstrate the dynamic instability of a five and one half caliber long, spin stabilized body of revolution. A modification of this body, i.e., the addition of fins to the boattail section, is shown to be an effective means of controlling this instability. The optically acquired angular orientation data was fitted to a closed form solution of the differential equations of motion. The pitching, damping, and Magnus moments were evaluated as both linear and nonlinear functions of angle of attack. The airflow over the model was observed by means of smokeflow photography.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1972
Accession Number
AD0744444

Entities

People

  • Roy W. Kline

Organizations

  • Picatinny Arsenal

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aerodynamic Stability
  • Angular Motion
  • Bodies Of Revolution
  • Boundary Layer
  • Cameras
  • Center Of Gravity
  • Differential Equations
  • Equations
  • Low Drag
  • Orientation (Direction)
  • Photographs
  • Photography
  • Test Equipment
  • Test Facilities
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Marine Hydrodynamics
  • ballistics.