Airborne Aids for Coping with Low-Level Wind Shear.
Final rept. Jun 75-Jul 79,
SRI INTERNATIONAL MENLO PARK CA AVIATION SYSTEMS LAB
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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.
- Flight Control and Instrumentation