[ExI] Toroidal propellers: A game changer in air and water

BillK pharos at gmail.com
Fri Jan 27 21:22:00 UTC 2023

These strangely-shaped twisted-toroid propellers look like a
revolutionary (sorry) advance for the aviation and marine sectors.
Radically quieter than traditional propellers in both air and water,
they're also showing some huge efficiency gains.

Looks good! Still very early in development though, so improvements
can be expected.


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