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Reference Speed (Vref)
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| Article Information | ||
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| Category: | General | 
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| Content source: | SKYbrary | 
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| Content control: | SKYbrary |
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Definition
1.3 times the stalling speed in the stated landing configuration and at the prevailing aircraft weight. This is the speed required as the landing runway threshold is crossed at a height of 50 feet15.24 m <br /> in landing configuration if the calculated aircraft performance is to be achieved.