Mach hold mode

Mach hold mode

In a flight control system, a control mode in which a desired flying speed of an aircraft expressed as a Mach number is maintained automatically. The system is used in high-speed aircraft flying at a high altitude. The signal output from sensors measuring the air speed and the altitude are integrated into a central data computer to provide the required Mach signal output.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved