fastest nasa plane
NASA X-43A is an unmanned experimental hypersonic aircraft designed by NASA. It is the fastest aircraft ever built, currently holding the fastest flight speed record. NASA has been officially recognized by the Guinness World Records in 2005 for setting the highest speed record for a jet-powered aircraft, when X-43A reached the speed of 10,461 km/h (7,000 miles per hour) or 8.4 times faster than the speed of sound.