trou?e d'envol / drift-down

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trouée d'envol / drift-down

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25th March 2014 | 06:50

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FLT86

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Joined: Mar 2009

Posts: 60

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From: Paris

trouée d'envol / drift-down

bonjour,

je n’ai pas très bien compris le principe de la trouée d’envol et de la drift-down procedure.
pouvez-vous me les expliquer svp ?

merci

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