Dynamic Balancing of a Nonrolling, Sting Supported, Wind Tunnel Model Performing Nonplanar Motions

Abstract

Wind-off, bench tests on a wind tunnel model that had freedom to pitch, and yaw, but no freedom to roll indicated that the pitching and yawing motions were inertially coupled. An order of magnitude analysis showed that this coupling was due to the product of inertia term I sub YZ. The inertially coupled equations of motion are solved, and a method is presented for determining the magnitude and sign of L sub yz from recordings of the model motion. The method used to dynamically balance the model is described, and experimental results are presented that verify this method.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1972
Accession Number
AD0752208

Entities

People

  • Kevin E. Yelmgren

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Angular Motion
  • Bench Tests
  • Classification
  • Coordinate Systems
  • Couplings
  • Equations
  • Equations Of Motion
  • Frequency
  • Molecular Dynamics
  • New York
  • Numerical Analysis
  • Resonant Frequency
  • Vibration
  • Wind Tunnel Models
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Control Systems Engineering.