a thoughtful web.
Good ideas and conversation. No ads, no tracking.   Login or Take a Tour!
comment by Bosun
Bosun  ·  2225 days ago  ·  link  ·    ·  parent  ·  post: Cheap oil killed sailing ships. Now they’re back and totally tubular

Interesting, however the Flettner Rotor still needs a combustion engine to turn the rotor.