Part 3 of the single propeller drone build is here. Watch the latest progress as the Arduino-powered project comes together ...

Add Yahoo as a preferred source to see more of our stories on Google. Ukraine has been pushing the speed of its interceptors as Russia develops its newer jet-powered Shaheds.Maks Muravsky/Global ...

Quadcopters tend to have very poor efficency because of their high disk loading. High disk loading– that is, how much weight each square meter of area swept by the propellers must carry–is almost ...