In a bubble test, air is blown in front of the spinning propeller to visualize the flow of the water. This revealed some stalling on the bi-blade and the toroidal design too, which would explain ...

The toroidal propeller, one of the Lab's @RD100Awards winners, has a unique, closed-form propeller design that makes it a significantly quieter alternative to common multirotor propellers on ...

Overall, toroidal propellers are an exciting recent development in propeller design, at least in some cases. While they can be more quiet, they won’t completely replace traditional props just ...

Have a listen in the video below: The toroidal propeller, one of the Lab's @RD100Awards winners, has a unique, closed-form propeller design that makes it a significantly quieter alternative to ...

The origins of the toroidal propeller date back to the 1980s, when researchers studying fish movement discovered that a toroidal shape could create a vortex around the blade, reducing drag and ...

Overall, toroidal propellers are an exciting recent development in propeller design, at least in some cases. While they can be more quiet, they won’t completely replace traditional props just ...

Have a listen in the video below: The toroidal propeller, one of the Lab's @RD100Awards winners, has a unique, closed-form propeller design that makes it a significantly quieter alternative to ...