"Stan Prevost" wrote:

But my question is how do they do it? The desired track in a hold is
not the pretty little racetrack pattern with two parallel sides and
two semicircles at each end, except in a no-wind situation.

An FMS does fly all holding patterns with two parallel sides and two semicircles. It corrects for the wind
by commanding the bank angle required to track the semicircle. This may be more or less than a
standard rate turn, depending on the wind.

Mike