Fastest Plane of the world

The X-43 was an unmanned experimental hypersonic aircraft with multiple planned scale variations meant to test various aspects ofhypersonic flight. It was part of the X-plane series and specifically of NASA's Hyper-X program. It set several airspeed records for jet-propelled aircraft. The X-43 is the fastest aircraft on record at approximately 7000 miles per hour (10,461 km/h).^[1]

A winged booster rocket with the X-43 placed on top, called a "stack", was drop launched from a larger carrier plane. After the booster rocket (a modified first stage of the Pegasus rocket) brought the stack to the target speed and altitude, it was discarded, and the X-43 flew free using its own engine, a scramjet.

The first plane in the series, the X-43A, was a single-use vehicle. Three of them were built. The first was destroyed after malfunctioning in flight; the other two have successfully flown, with the scramjet operating for approximately 10 seconds, followed by a 10 minute glide and intentional crash into the ocean.