The Vref equals 1.3*Vso, where the Vso is the stall in landing configuration.
This speed is very important since is the minimum speed of your final approach. During the descend and approach briefing you need to calculate the Vref and the Vfly for that specific approach.
Since the Vref is closed related to the Stall speed, the higher the stall speed the higher will be your Vref.
The stall speed changes with the weight and the flap configuration. The heavier the Aircraft the higher the stall speed and, the higher flap setting the lower the stall speed.
The Vfly or V approach is the Vref corrected by the wind, this speed is your target final approach speed.
In order to obtain the Vfly we add half of the headwind component to the Vref, so, once you know the headwind component you divide it by two and then you add the result to the Vref.
The V approach will give you an extra margin on top of the Vref.
So, if you take your Vso (stall speed in landing configuration) and multiply it by 1.3 you obtain the Vref and, if you add the wind correction you get the Vfly.
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Timestamps:
00:00 Intro
00:35 What is the Vref
00:55 Boeing 737 Vref speed
01:18 Vref and Stall speed
02:55 What is the Vfly/ Vapproach
03:15 How to calculate the Vfly
05:32 Why we fly the Vfly
06:15 Final thoughts
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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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