Since its first flight in 2010, following tests with the earlier X-37A variant, it has been executing covert missions in Earth's orbit. The vehicle is just under 30 feet long and features tiny ...

The X-40A provided valuable approach and landing data for the 120-percent scale X-37A vehicle that would later make its own drop tests at Dryden. Those tests paved the way for the X-37B Orbital ...