It may look "nutty" and like a "blender," but the designers say the craft could challenge helicopters ...

Helicopters take advantage of the free stream flow along a rotor blade to produce lift and thrust. In rotating systems, the rotor hub clasps the blades and connects them to the main shaft of the ...

The Zhukovsky Central Aero-Hydrodynamic Institute (TsAGI) and the Mil Design Bureau have designed new rotor blades that make it possible to boost the speed of existing Russian combat helicopters ...