Improvement of Head-Up Display Standards. Volume 5. Head Up Display ILS (Instrument Landing System) Accuracy Flight Tests.

Abstract : An in-flight investigation of the effect of head-up display symbol accuracy has been conducted using a variable stability T-33 aircraft. The results indicate that 100-200 ft lateral errors and 500-1500 ft longitudinal errors in locating a contact analog synthetic runway did not cause difficulties for the evaluation pilots. There was no apparent tendency for the subjects to follow HUD cues and ignore real world cues. Keywords: Head up display, Symbology, Instrument, Flight control, Flight tests, Accuracy, Display.