There was a great documentary[0] on this a few years ago. They specifically talked about the energy requirements and how they solved them. [0] https://m.imdb.c

There was a great documentary[0] on this a few years ago. They specifically talked about the energy requirements and how they solved them. [0] https://m.imdb.com/title/tt0133093 https://m.imdb.com/title/tt0133093