The obvious solution was to adapt the toroidal shape for a PC fan. He was familiar with the idea from similar screws on boats that are commercially available. You can see his tests in the video below.

He proposed the toroidal shape (like a donut) as a potential solution for navigating viscous environments. However, despite ...

A team at MIT’s Lincoln Lab has developed a new propeller shape that significantly reduces ... researchers iterated on various toroidal propeller geometries until arriving at one that ...

Jinlin and colleagues wanted to determine whether observed radio source asymmetries indicate that magnetic fields in the galactic halo still have a toroidal shape when the effects of the ...

Torispherical tank heads feature a dish with a fixed radius. The knuckle, the transition between the cylinder and the disk, has a toroidal shape. There are two main types of torispherical tank heads: ...