Aerodynamic Characteristics and Subsonic Flight Performance of the Spin- Stabilized, 4.2 Inch M329A1E1 Mortar Projectile

Abstract

An extensive study of the aerodynamic characteristics of the 4.2 in. M329A1E1 Mortar Projectile has been conducted. A spectrum of yaw levels up to 40 degrees and Mach numbers from 0.55 to 1.025 were covered in the Ballistic Research Laboratories (BRL) Transonic Range Facility. A Magnus wind tunnel test in the Ames 12 ft. Pressure Wind Tunnel involved boom and boattail effects on Magnus as well as static forces from moments. Mach numbers from 0.3 to 0.95 and angles of attack from 0 to 30 degrees (for a Mach number of 0.3) and 0 degrees to 20 degrees (for the higher Mach numbers) were considered. Shells instrumented with yaw sondes were fired at Wallops Island Facility of NASA. The theoretical differential equation of motion then was fitted to the resulting single plane angular motion data.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1972
Accession Number
AD0746977

Entities

People

  • R. Kline
  • W. Gazdayka

Organizations

  • Picatinny Arsenal

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Angular Motion
  • Aspect Angle
  • Center Of Gravity
  • Computer Simulations
  • Differential Equations
  • Equations
  • Gages
  • Insensitive Explosives
  • Mach Number
  • Muzzle Velocity
  • Projectiles
  • Research Facilities
  • Rotating Bands
  • Test Facilities
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Fluid Dynamics.
  • ballistics.