Successful test flight of unmanned aircraft in the US brings the hypersonic era closer
American aerospace company Stratolaunch hailed the first powered test flight of a new unmanned craft for hypersonic research on Saturday a success. Hypersonic describes flights at speeds of at least Mach 5, or five times the speed of sound. Chief Executive Officer Zachary Krevor said in a statement that the Talon-A-1 vehicle "reached high supersonic speeds approaching Mach 5 and collected a great amount of data at an incredible value to our customers". Paris to New York in 1.5 hours: The hydrogen jet looking to usher in hypersonic air travelKrevor said he could not release the specific altitud...