Between June 15 and July 29, 1945, six Army Air Forces pilots flying experimental Sikorsky helicopters evacuated between 75 and 94 wounded American soldiers from the Philippine jungles while under ...

Helicopters on Mars may sound like something from a science fiction novel — or perhaps just a typical "Doctor Who" episode. But actually, they're not fully confined to the world of sci-fi; after all, ...

In order to increase flight speed, coaxial high-speed helicopter is getting more and more attention. Due to the complexity of its transmission system, this study mainly deals with dynamics reduction ...