The orientation of an airport runway is determined by:
Choose the correct answer
Prevailing wind direction
Wind rose analysis to maximize wind coverage (percentage of time crosswind component < permissible limit)
Sun angle
Terrain only
Correct Answer
B. Wind rose analysis to maximize wind coverage (percentage of time crosswind component < permissible limit)
Why is this the answer?
Runway orientation is chosen using wind rose analysis so that aircraft can take off/land with acceptable crosswind components (< 20 km/h for small aircraft, < 37 km/h for large aircraft) for maximum percentage of time (usually 95%). The most favourable wind direction = lowest crosswind.
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