Month: January 2025

Mix and Matching Propellers Reduces Noise

It took some outside-the-box thinking by the folks at Aurora, a Boeing-owned company, to arrive at this invention. They asked the question “but Why are drones so loud?” The answer is not so simple: constructive interference. When a propeller spins, it has a noise profile. This noise profile is part spinning motor, part propeller’s interaction with air. This profile has peaks and valleys. Add 3 more propellers with identical noise profiles, and the peaks and […]

Airborne Battery Swapper for Telecom Drones

Ericsson (the Swedish telecommunications giant) has applied for an interesting invention: a UAV that can swap batteries of other UAVs mid-flight. Why would Ericsson need an electric air refueling tanker? Because they want to provide telecommunication services using drones. Imagine being on a search and rescue mission in a vast expanse of nothing, and you need to check your Instagram. Ericsson’s drones can provide full mobile coverage, and stay aloft indefinitely. The invention mainly discloses […]