UH-60 Black Hawk helicopter rotor up close.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...1_fullsize.jpg
Fullsize image: https://s3-us-west-1.amazonaws.com/h...2_fullsize.jpg
Fullsize image: https://s3-us-west-1.amazonaws.com/h...3_fullsize.jpg
Previously:
Helicopter with intermeshing rotors - GIF
Helicopter main rotor blade flex - GIF
Helicopter rotors collide - GIF
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