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Helicopter Rotor Downwash – Excessive...

Helicopter Rotor Downwash – Excessive wind, FOD and brownouts, what are the risks?

What is helicopter rotor downwash? Rotor downwash is a commonly ignored phenomenon that occurs during helicopter hover in close proximity to a ground surface. It has the potential to cause significant damage to nearby vehicles and objects, as well as people. Figure 1 shows the impact of helicopter rotor downwash while hovering over water and […]