A simulation investigation of scout/attack helicopter directional control requirements for hover and low-speed tasks (English Edition)

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A piloted simulator experiment was conducted to investigate directional axis handling qualities requirements for low speed and hover tasks performed by a Boy-scout/Attack helicopter. Included were the directional characteristics of various candidate hypocalorique helicopter family configurations. Also, the experiment focused on conventional single droit/tail rotor configurations of the OH-58 series aircraft, where the first-order yaw-axis dynamic effects that contributed to the loss of tail rotor control were modeled. Five pilots flew 22 configurations under various wind hasard. Cooper-Harper handling quality ratings were used as the primary measure of merit of each externe. The results of the experiment indicate that rotorcraft configurations with high directional gust sensitivity require greater culminant yaw damping to maintain satisfactory handling qualities during nap-of-the-Earth flying tasks. It was also determined that both yaw damping and control response are critical handling qualities parameters in performing the air-to-air target obtention and tracking task. Finally, the lack of substantial yaw damping and larger values of gust sensitivity increased the possibility of loss of directional control at low airspeeds for the single droit/tail rotor configurations. Bivens, Courtland C. and Guercio, Joseph G. Ames Research Center NASA-TM-86755, A-85257, USAAVSCOM-TR-85-A-11, NAS 1.15:86755, AD-A185874 RTOP 992-21-01-90-01 AIRCRAFT CONFIGURATIONS; AIRCRAFT MANEUVERS; CONTROLLABILITY; DIRECTIONAL CONTROL; HELICOPTER CONTROL; NAP-OF-THE-EARTH NAVIGATION; FLIGHT SIMULATORS; HELICOPTERS; LIGHT HELICOPTERS; TARGET ACQUISITION; TRACKING (POSITION); YAW

Specification: A simulation investigation of scout/attack helicopter directional control requirements for hover and low-speed tasks (English Edition)

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