Wow, there’s innovation in propeller shapes (which i thought we’re close to optimal for a century): toroidal propellers >50% performance improvement at midrange rpms in liquids!
Toroidal propellers: A noise-killing game changer in air and water
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.
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