The study referenced in the Popular Mechanics article (Leonardo da Vinci’s 500-Year-Old Invention Might Fix the #1 Problem With Drones) noted that the Da Vinci design had a lower lift coefficient, but required less power and generated less noise.
That ship sailed 50 years ago. Consumer electronics were always a race to the bottom. Walmart laid a heavy hand on its supplies to move production to cheaper markets over the last 40 years. Consumers have not shown any great interest in paying...
From Ukrainian Drone Delivers Emergency E-Bike To Surrounded Soldier - Jalopnik
A brigade of the National Guard of Ukraine delivered an e-bike to an injured soldier who was surrounded by enemy soldiers.
Skydio assembles their drones in the US, but a substantial portion of the parts come from Asia.
Batteries: Dongguan Poweramp Technology Ltd, manufactured in Guangdong, China
Camera sensor: Sony IMX577 image sensor. manufactured in Guangdong...