Quote:
Originally Posted by kidicarus5897
Is there a rule of thumb for what TAS to fly when experiencing a given headwind or tailwind. I usually see, and it makes sense that, we are usually dispatched to fly MSC with a headwind and .76 or so with a tailwind to maximize efficency, but I can't figure out what formula they use. Anyone have an idea? Curious because with winds different than forcast for the flight plan, it might be adventageous to increase/decrease TAS accordingly to save fuel.
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From "Handling the big jets" aka bible for Cathay interviews take your filed TAS - half the tail wind or headwind and add or subtract to the TAS. For example flying westbound with a TAS of 420 with a 60 kts headwind - 420+30 (1/2 of 60) - fly at 450 (not as likely as subtracting for tailwind. The essence: spend as little time as possible in headwinds and as long as possible in a tailwind. Clear as mud?