HELICOPTER DOWNWASH BLAST EFFECTS STUDY

Abstract

Field tests were conducted with operational helicopters at Fort Rucker, Ala., and at the Waterways Experiment Station to determine downwash velocity profiles. In addition, tests utilizing scale-model rotor blades were made at the WES over wet and dry sands and a dry lean clay, and over a chemically stabilized soil, plastic-impregnated soils, and lightweight ground covers (membranes) to determine modelscale velocity profiles and air velocities at the ground surface required to dislodge and move particles of various types of soil, the size of soil area requiring protection for various VTOL aircraft, and the effectiveness of membranes and soil stabilization in preventing dust- cloud formation.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1964
Accession Number
AD0452177

Entities

People

  • G. W. Leese

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Blast
  • Boundary Layer
  • Downwash
  • Ducted Fans
  • Dynamic Pressure
  • Field Tests
  • Helicopters
  • Lightweight
  • Measurement
  • Membranes
  • Model Tests
  • Models
  • Propeller Hubs
  • Rotary Wing Aircraft
  • Scale Models
  • Soil Stabilization

Readers

  • Aerospace Engineering
  • Explosive Engineering.
  • Geotechnical Engineering.