A sequence of ground-and flight-simulation experiments was conducled at the Ames Research Center as part of a joint NASA/FAA program to investiyate helicopter instrument-flieht-rules (IFR) airworthiness criteria. This paper describes the first six of these experiments and summarizes major results. Five of the experiments were conducled a n large-amplitude motion base simulators at Ames Research Center; the NASA-Army V/STOLAND UH-IH variable-stability helicopter was used in the flight experiment. Among the results shown for instrument operations are a requirement for some level of artificial stability and control, the adequacy of neutral longitudinal control position gradients, a limited advantage of including flight directors in the display, and the necessity for pitch and roll altitude stabilization to achieve ratings of satisfactory for the approach tasks considered.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.