To observe it live without trying too hard, an airport where HWC is less than 10 kt at threshold would be best. With the landing flap out, check ND for TAS - GS and observe that
- for HWC stronger than 10 kt, any variation will be reflected on the Vapp target;
- for HWS slower than 10 kt, adjustments to Vapp target do not happen.
Done.