Figure 7

Heart rate changes around the engine failure: (a) HR changes during maneuvers inside, outside or at the line limit of the height-speed diagram. (b) HR changes between different groups of pilot expertise: Group 1 (test pilots with extensive autorotation experience), Group 2 (test pilots with lesser autorotation experience) and Group 3 (operational pilots with lesser autorotation experience). (c) HR changes for the four zone regions. The high-hover had the highest area under the curve, being followed by cruise. Take-off and Knee were not significantly different. (d) Average percent change of HR around the engine failure for all maneuvers. We emphasize that these averaged figures are used only to facilitate an overview of the data. For statistics purposes, the effects of repetitions were incorporated in a linear mixed effect model.