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  1. 10-18-2015, 06:36 AM #1
    Fritz
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    mcdu perf appr - wind from different directions

    Hi,
    what do I have to insert on the MCDU PERF APPR page at arrival airport surface wind, if the wind comes from different directions?

    Thanks for the help
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  2. 10-19-2015, 05:52 AM #2
    asessa
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    Re: mcdu perf appr - wind from different directions

    Sorry i didn't understand your question... when you get a metar you have only 1 direction for wind
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  3. 10-19-2015, 07:15 AM #3
    Fritz
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    Re: mcdu perf appr - wind from different directions

    VRB - Variable
    Used when windspeed is less than 3KT or during a violent thunderstorm
    when wind direction can not be determined.

    You can not insert VRB on the MCDU PERF APPR page.
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  4. 10-19-2015, 07:25 AM #4
    asessa
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    Re: mcdu perf appr - wind from different directions

    I usually insert only the wind
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  5. 10-24-2015, 02:07 PM #5
    Fritz
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    Re: mcdu perf appr - wind from different directions

    BLANK is also not a valid value for the wind direction. It must be a value between 0 and 360.
    I suppose variable (VRB) is currently not implemented.
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  6. 10-25-2015, 03:18 AM #6
    OmniAtlas
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    Re: mcdu perf appr - wind from different directions

    I don't think winds have been implemented into the calculations so I leave this blank.
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  7. 11-04-2015, 10:58 PM #7
    masterp
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    Re: mcdu perf appr - wind from different directions

    you can insert the headwind...runway heading if it VRB
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  8. 11-09-2015, 04:09 AM #8
    Maddin91
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    Re: mcdu perf appr - wind from different directions

    The wind is only used to calculate Vapp.
    Always use the worst case scenario. Let's say runway is 360. Wind is given as 05015kt 010V090. In this example worst case would be 090 with 15kts because it's the full crosswind.

    As a guideline: Headwind is good, crosswind is bad, tailwind is worse.
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  9. 11-09-2015, 06:45 AM #9
    OmniAtlas
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    Re: mcdu perf appr - wind from different directions

    Whatever Mag/Wind I insert in the Approach page my VAPP does not change.
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