Military

Eurocopter Moves One Step Closer to ‘Whisper Mode’

02-26-2010 • Jason Paur @ Autopia

The new blade shape is combined with another technology called Blue Pulse, which adds three flaps to the edge of the rotor blades. These flaps move up and down at 15 to 40 times per second, using piezoelectric motors that also help to reduce the blad