Over the past few years, labels such as DJI have pushed drones into the mainstream. If you look closely, you'll notice that a majority of them have four propellers, while helicopters have fewer of ...

The images, reportedly captured in April, show a compound helicopter with coaxial main rotors and pusher propeller, which bears similarity to Sikorsky’s X2 Technology. Few days after photos emerged of ...

The Joby Aviation eVTOL is described as a helicopter-airplane hybrid, with fixed wings and six propellers mounted on nacelles and capable of tilting 90 degrees. It will take off and land vertically, ...