alt Hacker NewsThe coolest recent development in marine propellers is toroidal propellers which are now commercially available and seem to perform significantly better than standard propellers: https://www.sharrowmarine.com/
Replies
HPsquared • today at 3:09 PM
That's pretty cool, but I wonder if they can get stuff tangled in there.
LoganDark • today at 12:32 PM
That website seems to no useful information; only marketing speak about how great it is... Do you know of a good source on how toroidal propellers work and the engineering behind them?
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For the most part the Sharrow props have not proven to be much of an improvement, particularly for the high price.
The tests that have shown "significant" improvements have frequently compared the Sharrow to a sub-optimal prop. Feedback from many actual users is that the gains are moderate over a narrow RPM range.