To understand how far hypersonic ambitions can realistically go, I keep returning to the single X-15 airframe that flew higher and faster than any other, a machine that bridged the gap between ...

Key Points and Summary - NASA’s X-43A wasn’t a paper study—it was a 12-foot, hydrogen-fueled experimental jet that proved an air-breathing engine could fly at nearly ten times the speed of sound. -It ...

Add Yahoo as a preferred source to see more of our stories on Google. (NewsNation) — The Department of Defense announced Monday the United States successfully completed two test flights of a reusable ...

Stratolaunch has finally found a use for the world’s largest airplane. Twice in the past five months, the company launched a hypersonic vehicle over the Pacific Ocean, accelerated it to more than five ...