Helicopter starts:
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Helicopter approaching and hovering
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Helicopter in flight
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Helicopter flies (fast)
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Helicopter starts
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Helicopter flies slowly
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Helicopter takes off
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Helicopter Warning System
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Helicopter engine malfunction signal
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Helicopter approaching and landing
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Helicopter shuts down
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A helicopter approaches, lands and flies away
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Flies away, Helicopter whirls in place
★★★★★