Megastructures

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Megastructures: Extreme Helicopter
Extreme Helicopter
National Geographic  |  May 13, 2015

The Air-Crane heavy-lift helicopter is really big, totally cool and addictively watchable as it does extra-heavy, brute-force work with surgical precision.

The Air-Crane heavy-lift helicopter is really big, totally cool and addictively watchable as it does extra-heavy, brute-force work with surgical precision.

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