Accession Number:

AD0839673

Title:

HIGH ALTITUDE CLEAR AIR TURBULENCE MODELS FOR AIRCRAFT DESIGN AND OPERATION

Descriptive Note:

Final rept. 1 Mar 1966-30 Jun 1968

Corporate Author:

LOCKHEED-CALIFORNIA CO BURBANK

Personal Author(s):

• Ashburn, Edward V.
• Prophet, David T.
• Waco, David E.

Report Date:

1968-07-01

Pagination or Media Count:

135.0

Abstract:

This report presents the results of an analysis of the turbulence data derived from the high altitude clear air turbulence HICAT flight investigation and from the pertinent meteorological and geophysical data. The curves representing the power spectra have various slopes and shape. These curves are grouped into categories. One group of categories are predominantly cases of flights over mountains. A second group of categories are mostly from flights over flatland. Theoretical, statistical, and practical forecasting analyses in addition to flight records all indicate that large horizontal temperature gradients and large changes in vertical temperature gradient are closely associated with HICAT and conversely small horizontal temperature gradients and nearly constant vertical temperature gradients are closely associated with smooth air.

Descriptors:

• *CLEAR AIR TURBULENCE
• AIRCRAFT
• ATMOSPHERIC MOTION
• HIGH ALTITUDE
• OPERATION
• AIR MASS ANALYSIS
• METEOROLOGICAL PHENOMENA
• GEOPHYSICS
• ATMOSPHERE MODELS
• GUST LOADS
• FLIGHT TESTING
• STANDARDS

Subject Categories:

• Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE