Aircraft maneuver envelope warning system

A maneuver envelope warning system for an aircraft having operating limits, operating condition sensors and an indicator driver. The indicator driver has a plurality of visual indicators. The indicator driver determines a relationship between sensed operating conditions and the operating limits; such as, a ratio therebetween. The indicator driver illuminates a number of the indicators in proportion to the determined relationship. The position of the indicators illuminated represents to a pilot in an easily ascertainable manner whether the operational conditions are approaching operational limits of the aircraft, and the degree to which operational conditions lie within or exceed operational limits

A simulation investigation of Scout/Attack helicopter directional control requirements for hover and low-speed tasks

A piloted simulator experiment was conducted to investigate directional axis handling qualities requirements for low-speed (<40 knots) and hover tasks performed by a Scout/ Attack (SCAT) helicopter. Included in the investigation were the directional characteristics of various candidate light helicopter family configurations. Also, the experiment focused on conventional single main/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. Two types of yaw stability and control augmentation systems were implemented: one consisting of washed-out yaw rate feedback and shaped control input, the other a way rate command, heading-hold system. Five pilots flew 22 configurations under various wind conditions.http://archive.org/details/simulationinvest00biveApproved for public release; distribution is unlimited