EXPERIMENTS ON THE DISSIPATION OF WARM FOG BY HELICOPTER-INDUCED AIR EXCHANGE OVER THULE AFB GREENLAND,

Abstract

Tests have demonstrated that certain types of shallow fogs can be dispersed by the downwash created by helicopters flying at near-hovering airspeeds at altitudes a few feet above the top of the fog. One helicopter can clear an area about 75 yards wide by a mile long every 10-15 minutes. This system requires unsafe flying techniques, i.e., near-hovering airspeeds during which time the helicopter is operating at almost full power, low altitudes and positions where an engine failure would probably result in a crash since the aircraft would have to descend through the fog to an unknown landing area. Therefore, this technique is recommended for emergency use only. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1965
Accession Number
AD0474070

Entities

People

  • J. R. Hicks

Organizations

  • Cold Regions Research and Engineering Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Airspeed
  • Altitude
  • Dissipation
  • Downwash
  • Elevation
  • Emergencies
  • Greenland
  • Helicopters
  • Hovering
  • Low Altitude

Readers

  • Aerospace Engineering
  • Educational Psychology