Coffin Corner Explained - [How YOU can spot the coffin corner by looking at the Airspeed Indicator] 

In this video, we are going to talk about the Coffin Corner.
If you stay until the end I will show you with the simulator how an Airline Pilot recognise that he/she is flying into the coffin corner.
The Coffin Corner is the point at which your High-Speed Buffer and your Low-Speed Buffet coincide.
In order to understand this phenomenon, we need to talk about what happens to your stall speed and your Maximum Mach Number (MMO) with the increase in altitude.
Since the local speed of sound (MACH 1) expressed in knots decreases when temperature fall this means that at high altitude your MMO will a slower knots speed compare to the mean sea level one.
The opposite is true to you stall speed True Air Speed, because the Air Density decreases with the altitude so you need to fly faster in order to keep flying, thus your stall speed will increase.
When your High-Speed Buffer or MMO decreases to the point where meets the low-speed buffet (that has increased due to higher stall speed) you have a problem called coffin corner because if you accelerate you will Overspeed and if you slow down you will have the pre stall buffet.
If you find yourself in this scenario you need to watch very closely your Indicated Airspeed or descend to a lower altitude.
If you want to learn more about mach number watch the following video:
• Mach To Knots: Why Do ...
If you are curious to know what the Critical Mach Number is watch the following:
• Critical Mach Number E...
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Disclaimer:
THIS VIDEO IS FOR ENTERTAINMENT PURPOSES ONLY.
NOT FOR REAL-LIFE OPERATIONS.
PLEASE REFER TO THE OFFICIAL MANUAL AND DOCUMENTATION.
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