THREE METHODS OF PRESENTING FLIGHT VECTOR INFORMATION IN A HEAD-UP DISPLAY DURING SIMULATED STOL APPROACHES

摘要

A simulator study was conducted to determine the usefulness of adding flight path vector symbology to a head-up display designed to improve glide-slope tracking performance during steep 7 5° visual approaches in STOL aircraft All displays included a fixed attitude symbol, a pitch- and roll-stabilized horizon bar, and a glide-slope reference bar parallel to and 7 5° below the horizon bar The displays differed with respect to the flight-path marker (FPM) symbol display I had no FPM symbol, display II had an air-referenced FPM, and display III had a ground-referenced FPM No differences between displays I and II were found on any of the performance measures Display III was found to decrease height error in the early part of the approach and to reduce descent rate variation over the entire approach Two measures of workload did not indicate any differences between the displays.