free-stream Mach number
free-stream Mach number[′frē ‚strēm ′mäk ‚nəm·bər]
The Mach number of the total airframe (entire aircraft) as contrasted with the local Mach number of a section of the airframe.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
free-stream Mach number (MFs)
The Mach number of a body measured in free stream, which is unaccelerated by the airfoil or the body's presence.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved