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LysPJ • yesterday at 12:37 PM • 2 replies • view on HN

Here you are: https://en.wikipedia.org/wiki/Toroidal_propeller

Replies

AftHurrahWinch • yesterday at 5:33 PM

Really enjoyed this:

> In the centuries after Archimedes invented the Archimedes' screw, developments of propeller design led to the torus marine propeller... it was invented in the early 1890s

"the centuries" indeed. :)

reedciccio • yesterday at 1:58 PM

Uhm... The article lacks quite a few citations.