The whirling of helicopter rotors might be the most feared sound in ski racing. Skiers wearing little more than lightly ...

Helicopter rescues are an essential aspect of safety protocols in alpine skiing. The International Ski and Snowboard Federation mandates that a rescue helicopter or an equivalent evacuation method ...

The fundamental design principles behind rotary-wing aircraft date back to the Renaissance, with some of the earliest-known designs belonging to Leonardo da Vinci. Naturally, technology has ...

Helicopters are marvelous pieces of engineering, providing a live demonstration of the laws of physics as they carry us into the skies. With metal or composite blades angled just right and spinning at ...

A global team of researchers has demonstrated that active twisting of helicopter main rotor blades could help reduce noise ...