Drone breaks world speed record with 453 mph in test run — exotic sawtooth carbon fiber propeller blades one of the key advances in the Blackbird design

A drone team pushed an updated Blackbird prototype to an unofficial top speed of 453 mph in testing.

The run used custom handmade carbon-fiber propellers with sawtooth edges, designed for better high-speed efficiency.

An earlier flight lost connection, and the drone sustained minor landing damage, but the team plans an official attempt.

The result highlights progress in propeller and airflow design that could help multirotor drones go much faster.