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If so instructed by your teacher, print out a worksheet page for these problems. |
Open the slide called Mach Number
and read the definition of Mach number.
Various military aircraft have Mach numbers from 1.6 to over 3. Do you know what that means?
The unitless Mach number was named after the Austrian physicist Ernst Mach. The Mach number is ratio of the speed of the aircraft to the speed of sound . An airplane flying at less than Mach 1 is traveling at subsonic speeds; at about Mach 1, or transonic , it is at the speed of sound, and greater than Mach 1 is supersonic . An aircraft traveling at Mach 2 is traveling at twice the speed of sound.
The speed of sound on an average day at sea level is 761 mph. The
speed of sound depends on the composition and temperature of the air
and it decreases with altitude. For the following problems, assume
that the speed of sound is constant and equal to 740 mph.
Max Mach Number,
= __________________ Max Speed , km/hr =
______________________
Please send any comments to:
Curator:
Dave Mazza
Responsible Official:
Tom Benson