drones, future technologies, propellers, toroidal propeller

What is a ‘Toroidal Propeller’ and Could it Change the Future of Drones? An Expert Explains

The basic configuration of traditional propellers has not fundamentally changed since the first powered flight by the Wright brothers in 1903. However, as engineers learn more about aerodynamics and attempt new experiments, propellers are evolving into more complex shapes. These feature multiple blades, high sweep angles, blade tip devices, and other features to optimize performance ...

Troy Oakes

Toroidal propellers.