What is the fastest non-military airplane?
The Supersonic Concorde is the fastest airplane before its retirement in 2003. The Concorde had an average cruise speed of Mach 2.02 (an airspeed of around 2,140 km/h or 1,330 mph) with a maximum cruise altitude of 60,000 feet (18,300 metres). The current speeddiest airplane is the Cessna Citation X. It has a top speed of Mach 0.92, which at its normal flight altitude of 43,000 feet (13 km) is about 510 knots (945 km/h).