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@xAviation
When helicopters land in desert zones, sand grains strike the fast-spinning metal blades, creating a ring of white-hot sparks around the rotor. Called the Kopp-Etchells effect, it's often seen during night operations.
📸: Camden Thrasher
@xAviation
When helicopters land in desert zones, sand grains strike the fast-spinning metal blades, creating a ring of white-hot sparks around the rotor. Called the Kopp-Etchells effect, it's often seen during night operations.
📸: Camden Thrasher