Abstract: Building upon recent works of the authors on Unmanned Aerial Vehicle (UAV) micro-Doppler analysis, this paper introduces three novel algorithms for estimating up to four distinct propeller ...

At the very crux of engineering is the desire to problem-solve, optimize, and squeeze out every bit of efficiency possible from the system being built. Aircraft design and aeronautical engineering ...

Over the past few years, labels such as DJI have pushed drones into the mainstream. If you look closely, you'll notice that a majority of them have four propellers, while helicopters have fewer of ...

Midea Group has patented a counter-rotating motor for high-speed blenders. The motor includes a stator with outer and inner windings, an inverter for synchronous excitation, an inner rotor rotating in ...

It’s a rare occasion when a piece of engineering transcends its pure industrial function and becomes art. And it’s even rarer when that metamorphosis is the byproduct of a quest for better performance ...

Human flight is no longer a novelty. Nor is it any longer fun, if you ask Austrian startup FlyNow, which argues that the industrialization of flight has sucked all the fun out of it, among other ...

There are now a number of companies working on eVTOL (electric vertical takeoff and landing) "air taxis," most of which look a bit like larger versions of consumer quadcopter drones. The eCopter is ...

Tokyo, Japan – As anyone who drinks their coffee with milk knows, it’s much easier to mix liquids together than to separate them. In fact, the second law of thermodynamics would seem to dictate that a ...

Drone manufacturers have started to design aircraft for very specific applications, believes Ken Stewart, CEO of NUAIR (Northeast UAS Airspace Integration Research Alliance, Inc.). Government agencies ...

[Tom] likes to build little helicopters and decided to build one that runs on compressed air. (Video, embedded below.) Turns out it was a little harder than he thought. Originally, he was trying for a ...

An artist’s conception of Dragonfly on the surface of Titan. The real article will not launch until 2026, and arrives at Titan’s Shangri-La dune sea eight years later, in 2034. The friendliest place ...