The New Fastest Helicopter on Earth Can Fly at an Insane 300MPH

Most helicopters are built for hovering, not for speed. But the Eurocopter X3 is built for both. The demonstrator tilt-rotor aircraft proved as much when it set a pair of air speed records earlier this month. » 6/17/13 3:26pm 6/17/13 3:26pm

The Blade That Would Make Helicopters Almost Silent

Helicopters make a lot of noise because of a physical phenomenon called blade-vortex interaction. Eurocopter engineers have developed a new kind of rotor blade that attenuates this problem. It's called Blue Edge, and—as you can hear—it works beautifully: » 2/26/10 12:34pm 2/26/10 12:34pm