?????
On the runway the HDG and TRACK are the same, so how does the computer workout the wind??? Headwind or Tailwind yes but crosswind??
Hi Nitpicker, sorry for the late reply to this, but I had to wait until I flew again to check.
The A321 I flew today does give a wind and direction at 100kts on the take-off roll, and not just head or tail wind. RWY heading was 078 but the wind displayed was 063/7. As to how it does this, I don't know, but the ADIRS do compute yawing as well as everything else, and the flight computers know how much rudder is being put in and what the resultant track is - even on the runway. So it is not inconceivable that some clever software is doing the sums to give a wind vector.
I would be fascinated to learn more.
U