Piloted Flight Simulation Study of Low-Level Wind Shear Phase 3. All- Weather Landing Systems, Engineering Services Support Project, Task 2
Interim rept. Apr-Dec 1977
SRI INTERNATIONAL MENLO PARK CA AVIATION SYSTEMS LAB
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This task is concerned with development and test by piloted flight simulation of airborne techniques designed to aid the pilot to detect and cope with low-level wind shear. This report documents the Phase 3 tests on a DC-10 aircraft simulator, involving a set of wind profiles significantly expanded over those used previously and an especially large group 26 of subject pilots in the major test. The operational situation simulated was a landing under Category I visibility to a 7000-ft runway with ILS guidance. There were 10 different wind profiles, with wind shear ranging from low to high severity. In an initial trial various aiding concepts were compared in individual experiments. This involved 4 versions of groundspeed displays, 2 versions of modified acceleration- augmented flight director steering and speed commands, and 2 go-around decision aids a computation of longitudinal acceleration margin and an energy-rate meter. The more promising were combined in 3 systems tested in a full trial. Performance was marginal, but would have been adequate if all the go-around advisories had been honored. False-alarm and missed-alarm rates of the advisories were too high. Additional work was recommended on go-around decision aids, the importance of effective go-around decision aids being emphasized. It was noted that the go-around warning requires improved consistency in backup information an on-off display is not adequate.
- Flight Control and Instrumentation