Accession Number:

AD0753357

Title:

Helicopter Downwash Applied to Fog Clearing: A Status Summary

Descriptive Note:

Research and development technical rept.

Corporate Author:

ARMY ELECTRONICS COMMAND WHITE SANDS MISSILE RANGE NM ATMOSPHERIC SCIENCES LAB

Personal Author(s):

• Nordquist, Jr., Walter S.
• Dickson, David H.

Report Date:

1972-10-01

Pagination or Media Count:

53.0

Abstract:

The report summarizes the results of a literature search and a survey of helicopter pilots concerning the use of helicopter-induced downwash to effect temporary clearings in fog. While the technique has been unsuccessfully applied in a variety of situations, the available information indicates that the criteria for determining the probability of successful application of this method are yet to be completely established. In general larger helicopters, such as the CH-54, can be successfully used for clearing fogs of 500-600 foot depth however, smaller helicopters, such as the UN-1, do not work well for fogs of depths over 100-300 feet.

Descriptors:

• *FOG
• REMOVAL
• STATISTICAL DATA
• VIETNAM
• DOWNWASH
• HELICOPTERS

Subject Categories:

• Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE