Accession Number:

ADA080589

Title:

Airborne Aids for Coping with Low-Level Wind Shear.

Descriptive Note:

Final rept. Jun 75-Jul 79,

Corporate Author:

SRI INTERNATIONAL MENLO PARK CA AVIATION SYSTEMS LAB

Personal Author(s):

Report Date:

1979-07-01

Pagination or Media Count:

99.0

Abstract:

This report summarizes the development and test of airborne displays, instrumentation and procedures for aiding an airline jet-transport pilot to cope with wind shear on approach-and-landing and on takeoff. The task involved analysis of windshear effects, development of wind models including shear and turbulence, specification of displays and instrument models, and conduct of six large-scale piloted flight-simulation exercises. A set of candidate standard wind-shear models was developed. The beneficial effects of training in a moving-base simulator were noted. In tests on both wide bodied DC-10 and nonwide-bodied B-727 airplanes, and both precision and localizer-only approach, conventional instrumentation was found inadequate for coping with wind shear. Many instruments and techniques, including head-up displays, were tested. Ground speed was found to be an important additional item of information. A system, consisting of acceleration and ground speed augmented flight director, acceleration-margin criterion for advising go-around, and minimum-height-loss go-around pitch steering, was found to solve the wind-shear problem on approach and landing. Test procedures and requirements for device qualification were developed. No instrumentation was found that aided in coping with severe wind shear on takeoff.

Subject Categories:

  • Flight Control and Instrumentation
  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE