What is the fastest plane?
Breaking Records Through Aviation History. What is the fastest plane in the world today? That title goes to the unmanned NASA X-43, clocking in at a jaw-dropping Mach 9. If the thrill of a sonic boom gets your heart racing, you’re in the right place. The final flight of the small X-43A research aircraft is targeted to sustain a speed of up to Mach 10, or 10 times the speed of sound (about 7,000 mph), powered by a revolutionary airframe-integrated supersonic-combustion ramjet or ‘scramjet’ engine.