A rotary wing is characterised by the number of blades.

Such aircraft must be light and must have efficient rotary wings.

Now, the machine was dependent on fuel from the uptake of its rotary wing.

They had seven grasping arms apiece, each suspended from its own rotary wing.

Unpiloted, with a brain the size of a cell, they wouldn't think to turn their rotary wings upside down.

The engines of helicopters use their power to turn the rotary wings in a horizontal plane around a hub.

Rotary Wing - provides helicopter services for the oil and gas industry in Nigeria.

After much thinking and testing, the Wrights conceived of the propeller as a rotary wing.

At the same time, he brought his craft's rotary wing to full speed, dragging the smaller nanomachine behind him like a kid's balloon.

Over the years the stations emphasis changed from fixed wing aircraft to rotary wing, although its main role remains largely the same.