Preliminary Design of a Hemispherical-Nosed Add-On Control System Employing Spoilers.

Abstract

Preliminary design studies of methods for controlling the trajectory of a free-falling bluff body in subsonic and transonic flow regimes are described. Two types of controls, nose-mounted jet spoilers and nose-mounted cylindrical spoilers, are discussed. Results are reported from wind-tunnel tests conducted at the Arnold Engineering Development Center (AEDC) providing static stability characteristics and damping-in-pitch characteristics for a bomb model with nose-mounted spoilers. Results from trajectory calculations obtained using a program developed at Eglin Air Force Base are presented. Range envelopes for eleven spoiler configurations are obtained. Impact point scatter is estimated for the 'clean' configuration (i.e., without spoilers) using uncertainty tolerances provided with the aerodynamic data from the wind-tunnel tests. Recommendations are made for further study. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1971
Accession Number
AD0889686

Entities

People

  • Bernard M. Leadon
  • D. J. Green
  • J. M. Ward
  • R. S. Brunsvold

Organizations

  • University of Florida

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Control Systems
  • Engineering
  • Flow
  • Impact Point
  • Systems Engineering
  • Trajectories
  • Transonic Flow
  • Uncertainty
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerospace Test and Evaluation
  • Fluid Mechanics and Fluid Dynamics.
  • Software Engineering