Magic Halo Helicopters

9 11 2010
These helicopters emit a strange magic-like particles on their blades as they lift-off. Now what are these weird things?
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Apparently these are called The Kopp-Etchell Effect

“When a helicopter is flown near to the ground in desert environments abrasion occurs from the sand striking the rotor blade. At night, the sand hitting the metal abrasion strip causes a visible corona or halo around the rotor blades. The corona effect is caused by the oxidation of eroded particles resulting in visible corona.”



Source : chilloutpoint.com


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