Projectile Spin Rate Measurement Using Induced Electromotive Force Techniques

Abstract

This report deals with the problem of measuring the rotation of a projectile (spin) without altering the center of gravity, exterior surface and true weight of the projectile. Twenty millimeter projectiles were magnetized and fired parallel to a 12 foot long coil. The induced electromotive force (e. m.f.) was amplified and recorded on magnetic tape for playback through an oscillograph recorder. The period of the generated sine wave was then measured to determine the spin (f=1/T). Different barrels were used to obtain data over a wide range of twists. It was found that this system provided a reliable and 'production line' method for the measurement of spin rate.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1975
Accession Number
ADA010710

Entities

People

  • M. E. Goldser

Organizations

  • Frankford Arsenal

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Center Of Gravity
  • Classification
  • Engineering
  • Laboratory Procedures
  • Magnetic Fields
  • Magnetic Tape
  • Magnets
  • Materials
  • Measurement
  • Photography
  • Printed Circuits
  • Production
  • Projectiles
  • Recording Systems
  • Revolutions
  • Rotation
  • Security

Fields of Study

  • Physics

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Superconducting Magnet Technology
  • ballistics.