Your car's tachometer has a redline that's probably well below 10,000 rpm. These engines put the capabilities of production ...

The XF-84H was an ambitious project to reverse-engineer a jet-powered F-84 into a prop-driven aircraft capable of achieving ...

The European aerospace firm is confident will get approval from the United States' Federal Aviation Administration.

With four engines and barely a whisper, this aircraft defies expectations. Its unusual design and near-silent operation make ...