Accession Number : AD0474070

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

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH

Personal Author(s) : Hicks, J. R.

Report Date : AUG 1965

Pagination or Media Count : 21

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)

Descriptors :   (*FOG, SCATTERING), (*GREENLAND, FOG), HELICOPTERS, HELICOPTER ROTORS, AIR TRAFFIC, AIR TRANSPORTATION, FEASIBILITY STUDIES, CONVECTION, LOW ALTITUDE, TABLES(DATA), RADIOSONDES, DOWNWASH, COUNTERMEASURES, REDUCTION.

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE