Toroidal propellers

[Bill-Higdon]

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.

newatlas.com

Mmmm ok maybe

 

[rv6ejguy]

 

[Toobuilder]

 

[Vigilant1]

 

[Tiger Tim]

 

[Norman]

 

[Hot Wings]

 

[TheFlyingBikeGuy]

 

[jedi]

 

[rv6ejguy]

 

[Marc Zeitlin]

 

[henryk]

 

[jedi]

 

[rv6ejguy]

 

[TheFlyingBikeGuy]

 

[jedi]

 

[aeromomentum]

 

[Tiger Tim]

 

[Norman]

 

[BBerson]