mcdu perf appr - wind from different directions

[Fritz]

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

[asessa]

Sorry i didn't understand your question... when you get a metar you have only 1 direction for wind

[Fritz]

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.

[asessa]

I usually insert only the wind

[Fritz]

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.

[OmniAtlas]

I don't think winds have been implemented into the calculations so I leave this blank.

[masterp]

you can insert the headwind...runway heading if it VRB

[Maddin91]

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.

[OmniAtlas]

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