The ratio between the true air speed (TAS) and the local speed of sound (LSS). This ratio, which equals one when the TAS is equal to the LSS, is known as the Mach Number (M) and is very important in aircraft operating at high speed.
If you wish to contribute or participate in the discussions about articles you are invited to join SKYbrary as a registered user
Message to the Editor
What is SKYbrary
Copyright © SKYbrary Aviation Safety, 2021-2023. All rights reserved.