Your sUAS has a maximum airspeed of 30 knots. You fly straight out directly into a steady 12-knot wind, then return on the reciprocal course. What are your groundspeeds?

Explanation

Groundspeed is airspeed adjusted for wind, so flying into a 12-knot headwind gives 30 minus 12, or 18 knots, and returning with that wind as a tailwind gives 30 plus 12, or 42 knots. This is why the outbound leg eats far more battery per mile and why you should turn back well before the halfway point of your endurance. Wind clearly does affect groundspeed, and the reversed option applies the headwind on the wrong leg.