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Someone on the site asks about helicopters and I wonder the same thing. I know helicopters are hellishly expensive to use, but they are used occasionally - eg

• trhway 7y ago
  >The largest wind turbines can weigh up to 700,000 pounds fully assembled and typically require around 10 loads to transport. so, average speaking the components are on the scale of 35t/each. The current helicopters top at about 20t payload, so could be used only for some smaller parts. That one https://en.wikipedia.org/wiki/Mil_V-12 https://en.wikipedia.org/wiki/Mil_V-12 could have done more jobs here. Or it is a new and shiny market for airships (or some kind of hybrid with airship)