What is the Mach Speed of an aircraft?

I'm @dulip here to tell some kind of tech information today. This is one of my favourite subject and my one and only job that is Aeronautical Engineering .. So guys we will have a look about a supersonic aircraft from a technical view.. We all know in 1903 Wright brothers invented the first airplane. After that so many different changes Aeronautical branch has developed.. Today I'm not going to introduce you about the very basic and general stories such as what is the theory of flight etc. So my friends we all had learned about the the above mentioned theories in our advanced level classes..

Now we will enter to the point, An Austrian physicist Ernst Mach was invented this concept , So that this phenomena is named as Mach Number.. What is actually Mach Number is? I will tell you.. Before that I have to explain some facts about our atmosphere.

Density is directly proportional to the pressure
Density is inversely proportional to the temperature
Static pressure reducing when we climb through the atmosphere belt.

These fact are very useful to understand Mach Number and its concept...

Src

Simply we can say Mach number is the ratio of speed of a body to speed of sound. This is the most basic introduction which I can give you to explain the theory. In our day to day life we are using some words Supersonic ,subsonic etc. These words are related to the Mach terminology.. These words we use in Aeronautical Engineering to identify aircrafts by its speed.. As an example if an aircraft speed is less than Mach 01 or less than speed of sound that means aircraft is subsonic.. Anyway someone is telling to you that is a subsonic aircraft, then you have to understand that aircraft can't exceed the speed of sound.

Src

There is an insane method to calculate the Mach no of the aircrafts, I will explain you that from a familiar aircraft for the #Srilankan, that is #F7 aircraft... This is the one and only supersonic fighter jet we have in serviceable condition. There is an instrument called as Mach meter... It calculates the Mach speed of the aircraft..

This is the very basic introduction of the Mach Speed of an aircraft.. If you are satisfy with this article please give me your valuable comments...

Thank You...