Most often, you'll see helicopters with one main rotor and a single tail fan. However, one Bell helicopter has four small tail fans instead of one big rotor. One of the more interesting rotor ...

The main rotor of the doomed helicopter that crashed into the Hudson River was finally recovered Monday — which could provide crucial information as investigators continue to probe what caused ...

Space fans scouring the raw images from ... Related: Ingenuity Mars helicopter snapped rotor blade during hard landing last month (video, photo) Geovisual design student Simeon Schmauß also ...