Aircraft employing a scramjet system enjoy ... first airplane powered by an air-breathing engine to fly at hypersonic speeds. The X-43 broke all new ground throughout the course of its historic ...

To date, NASA has achieved speeds of Mach 9.6 using a scramjet (the X-43A unmanned hypersonic aircraft). Had the X-24C project proceeded, the US would likely be much further ahead today with ...

It was built to find out how aircraft structures, materials, and control surfaces would perform at hypersonic speeds and very high altitudes. In 199 research flights, the X-15 provided that ...