Drag Characteristics and Suitability of Three-Foot Long Parachute Decelerators,

Abstract

Air drop and wind tunnel tests were conducted to verify the stability of sonobuoys with decelerators limited to a total length of three feet. This limitation was established for safety reasons. The existing decelerator systems are configured to a length of 5 to 12 feet, with cross-type canopies varying in area from 1.5 to 3.5 square feet. Sonobuoys are blunt nose right circular cylinders, 4-7/8 inches in diameter, 36 inches long ranging in weight from 12 to 39 pounds. Testing established that suitable stability could be achieved using a three-foot long decelerator. Drag coefficient, opening load, high altitude air descent time and stability data were also determined for three-foot long decelerators. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 14, 1981
Accession Number
ADA111782

Entities

People

  • Carl T. Calianno

Organizations

  • Naval Air Warfare Center Warminster

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Acoustic Detectors
  • Aircrafts
  • Altitude
  • Coefficients
  • Computer Programs
  • Drop Tests
  • Dynamic Pressure
  • High Altitude
  • Load Cells
  • Low Altitude
  • Models
  • Parachutes
  • Rotary Wing Aircraft
  • Sonobuoys
  • Weight
  • Wind Tunnel Tests
  • Wind Tunnels

Readers

  • Aerial Delivery - Logistics and Supply Chain Management.
  • Aerodynamics/Aeronautics.