Breakthrough: A toroidal propeller design that makes drones whisper-quiet. This will scale to large people mover Drones.

Quiet propellers often indicate less efficiency. If these new "blades" are much less efficient, then flight time and distance will be severely impacted, and the noise factor may take a back seat. Except of course for the black whisper helicopters of the government's men in black.

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be sure to check RCFlightTest on Youtube. He has extensively studied this. Lots of great videos on it.

100 years in the making ... Safer, reduced noise, higher thrust

They're not exactly new. I was flying these a couple of years ago when they came out. They're not silent by any means but they do fly with less noise. I flew these a lot in a neighborhood bc regular 3 blade props on a 70mph bird diving trees kinda freaks people out sometimes 😄🤙

Great. Silent death drones. Awesome.

Like these?

We never got to hear the propeller. There was someone talking over it and music 😢

Very cool. Too bad the best ideas get patented thus preventing the best ideas from being widely adopted. Copyright and patent laws need to be rewritten so they are treated like recipes. Otherwise we will never reach our highest heights.

I'm sorry, but I'm not particularly impressed.

I do not like the military implications of this