Thank you all for watching and the interesting comments, here are some points to address the main ones I have seen:

Major props to the inventors.

I love seeing engineering breakthroughs like this. Amazing stuff.

So exciting! My dad was a metallurgist and cast many large propellers for military, cargo, and passenger vessels. I wish he was still around so I could share this with him. Thank you!

As a drone pilot, I love the idea of quieter flight & improved rfficiency! Hope these make it to the marketplace soon!

It's crazy how much improvement can be made to everything we already have.

“My intern did all the work and I won’t even say his name.” I’d expect nothing less

Being able to travel 20% farther with the same amount of fuel the boat can holy and doing it faster is quite an improvement.

Such a cool innovation with a surprising amount of applications! Hopefully they become more cost effective in the future!

Cavitation also is responsible for a great deal of wear and tear, shortening the service life of a propeller. Given that even smaller propellers aren't inexpensive, consider replacement costs on a cargo or military vessel.

I could see this being interesting for FPV, quieter at the same performance and potentially greater crash resistance with the right materials. Not to mention it would probably hurt a lot less to get hit by one of these props compared to an open blade

Unbelievably cool and useful. How did no one think of this earlier. It's amazing how we keep finding new improvements. I'm so excited for the future!

Back in the 70s I ran into this toroidal propeller design in patent reseach. While attempting to design a constant torque variable pitch propeller myself. Must say I was very impressed at the time. In my own study of the toroidal design I drew the same conclusion of machine shop limitations of this design in manufacturing on a commercial level. But an extremely viable concept since the invention of 3 axis cnc machinery on an industrial scale. The shape does redefine the term of warp speed,, due to the warping of edge chines in this design.

This may be the biggest innovation I've seen in my lifetime.

As someone who is looking to work on a bulk freighter on the Great Lakes, I would love to see these props tried on the large freighters. Hopefully they can make the ships even more efficient and comfortable for the crews.

I imagine that toroidal blades could be amazing on fans, both for noise and static pressure

Love to see the effects on massive ships like cargo and cruises