On Tuesday, June 18, 2019 at 7:43:16 AM UTC-7, krasw wrote:
Simple table that tells you how much to increase MC at certain headwind component would be enough to solve this issue.

Unfortunately not.

The problem of optimum MacCready speed in wind relates to both wind shear and the relative horizontal velocity of the thermals. With a uniform atmosphere in which the wind speed is constant with height and in which thermals move at the same speed as the wind, standard MacCready theory applies. In these ideal conditions, there is no advantage in changing speed upwind or downwind.

In the case where thermals move more slowly than the wind (the more general case) or where they don't move at all (wave), the optimal speed will generally be faster upwind and slower downwind. This is what many experienced cross-country pilots have intuitively figured out in the real world.

Mathematical analyses of these have been done by several folks, including John Cochrane and Branko Stojkovic. Long enough ago to be forgotten.

The solution of speed to fly with wind is not easy, since the effects of wind shear and thermal speed are variable and may not be known well enough for a satisfactory general mathematical solution.

Mike