High Speed Idle Engine Control Mode

Innovators at NASA's Glenn Research Center have developed an engine control mode that improves an engine's responsiveness to throttle commands during emergency landing conditions. The high speed idle (HSI) control mode increases the speed of the engine's fan and core shafts, allowing faster response and increased maneuverability during landing conditions when engines are in a low-power state. The innovation uses existing engine actuators to change the engine operating point to allow for faster engine response. Use of HSI increases fuel consumption, but it is anticipated to be used only in emergencies where the additional engine performance will help improve aircraft survivability.