The effects of increased damping in roll, pitch, and yaw on the flying qualities of a single-rotor helicopter for precision flight have been studied by means of visual maneuver and instrument approaches. Electronic components were used to vary the damping by producing control Inputs proportional to rate of roll, pitch, and yaw in a direction to oppose the angular velocities.nThe results indicate that, for a representative single-rotor heli¬copter, increased damping can reduce random deviations from the desired flight path and can decrease the effort required of the pilot, especially at low forward speeds. Increased damping in roll was found to be par¬ticularly beneficial; corresponding changes in yaw and pitch, however, were less effective for the combinations of parameters covered.nSome operational aspects of helicopter instrument approaches are also included in the discussion.
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