The Measurement of Non-Linear Forces and Moments by Means of Free Flight Tests

Abstract

It has been observed, that the behavior of missiles either moving under the influence of non-linear forces and moments or flying at large angles of yaw is frequently well described by curves of the same form as those generated by linear force systems and small angles of yaw. With this in mind an "equivalent" linear solution to the actual equations of yawing motion is obtained. This equivalent linear solution has been used in the analysis of a wide variety of programs fired on HRL's Spark Ranges and considerable success has been experienced. Excellent internal consistency has been observed in measuring non-linear normal and Magnus forces and their moments and, in all cases where wind tunnel results were available, they were in good agreement with range results. The application of this technique to the equally important problem of predicting yawing motion is described.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1956
Accession Number
ADA408436

Entities

People

  • Charles H. Murphy

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Forces
  • Agreements
  • Amplitude
  • Diameters
  • Differential Equations
  • Equations
  • Equations Of Motion
  • Flat Trajectories
  • Flight
  • Free Flight
  • Geometry
  • Mach Number
  • Moment Of Inertia
  • Trajectories
  • Transverse
  • Two Dimensional
  • Wind Tunnels

Readers

  • Aerodynamics/Aeronautics.
  • Control Systems Engineering.
  • Systems Analysis and Design