Required TAS
The TAS (and heading) needed to make good a course at a target groundspeed in a known wind: air vector = ground vector − wind vector.
WIND
REQUIRED TAS12/32SOLVED
°
kt
°
kt
How this is computed
The TAS (and heading) needed to make good a course at a target groundspeed in a known wind: air vector = ground vector − wind vector. Into a direct 20 kt headwind, holding 100 kt over the ground takes 120 kt true. Pinned in scripts/test-tools-solvers.ts; the CHECK line flags mathematically-valid but unflyable answers where the wind overwhelms the requested groundspeed.
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