News for hackers. Stuff that matters.

A comment on Toroidal propeller allows a drone to operate more quietly [pdf]. Parent comment

Re:Toroidal propeller allows a drone to operate more quietly... by someweirdperson on Sunday January 29, 2023 @05:45PM (#34573574)
Someone simply needs to invent a motor that provides constant torque through a full revolution.

To control the amount of thrust changeable rpm is needed, or a changeable geometry, like pitch. I imagine the latter wouldn't be easy with the toroidal propellers.

[ Parent | on HN ]
Re:Toroidal propeller allows a drone to operate more quietly... by eurasiantiger on Sunday January 29, 2023 @06:11PM (#34573786)
You could mount each toroidal blade on an angled pivot and use rpm control to change the pitch. This enables thrust vectoring.
[ Parent | on HN ]
Re:Toroidal propeller allows a drone to operate more quietly... by taneq on Monday January 30, 2023 @07:28AM (#34578801)
This might be what you're referring to, but Tom Stanton built a swashplateless 4 axis R/C helicopter (albeit not with toroidal blades) based on this principle: https://youtu.be/d80oXSCcHTk
[ Parent | on HN ]