The Mach number is named after the physicist and philosopher Ernst Mach according to a proposal by the aeronautical engineer See more

While the terms subsonic and supersonic, in the purest sense, refer to speeds below and above the local speed of sound respectively, … See more

Flight can be roughly classified in six categories:
For comparison: the required speed for low Earth orbit is … See more

When the speed of sound is known, the Mach number at which an aircraft is flying can be calculated by
$${\displaystyle \mathrm {M} ={\frac {u}{c}}}$$
where:
M is the Mach … See more

Mach number is a measure of the compressibility characteristics of fluid flow: the fluid (air) behaves under the influence of compressibility in a similar manner at a given Mach number, regardless of other variables. As modeled in the International Standard Atmosphere See more

As a flow in a channel becomes supersonic, one significant change takes place. The conservation of mass flow rate leads one to expect that contracting the flow channel would … See more

• Critical Mach number – Concept in aerodynamics
• Machmeter – Flight instrument
• Ramjet – Supersonic atmospheric jet engine
• Scramjet – Jet engine where combustion takes place in … See more