How fast was Concorde? Learn why Mach 2 meant about 1,350 mph and how its delta wing, Olympus engines, intakes and fuel trim sustained it.
Concorde normally cruised at Mach 2.0—about 1,350 mph (2,170 km/h or 1,170 knots) at 50,000–60,000 ft—and its operating limit was Mach 2.04. A slender delta wing, variable-geometry intakes, four Olympus 593 turbojets and carefully managed heat and fuel balance allowed sustained supersonic flight without continuous reheat.
How fast was Concorde in mph, km/h and knots?
Concorde's normal cruise speed was approximately twice the local speed of sound, giving a true airspeed around 1,320–1,350 mph depending on atmospheric temperature. The often-quoted 1,350 mph figure is a useful rounded value, not a fixed speed maintained on every flight.
| Measurement | Typical value | What it means |
|---|---|---|
| Cruise Mach | Mach 2.00–2.02 | About twice the local speed of sound |
| Maximum operating Mach | Mach 2.04 | The operational limit, not a target to exceed |
| True airspeed | About 1,320–1,350 mph | Roughly 2,125–2,175 km/h or 1,150–1,175 knots |
| Cruise altitude | About 50,000–60,000 ft | Concorde climbed gradually as fuel was burned |
| Ground speed | Variable | True airspeed adjusted for headwind or tailwind |
Mach is based on the speed of sound at the aircraft's location, which changes with air temperature. Nor should 1,170 knots true airspeed be confused with indicated airspeed: our explanation of how IAS and Mach differ at high altitude covers why the cockpit indications are not interchangeable.
How could Concorde sustain Mach 2?
Concorde combined low supersonic drag, carefully controlled airflow through its engines, high-altitude cruise and active fuel management. No single component made Mach 2 possible; the airframe, intakes, engines and control systems were designed around that operating point.
How did Concorde's engine intakes work at Mach 2?
The Olympus engines did not swallow air at Mach 2 directly. Computer-controlled intake ramps and spill doors formed a sequence of shock waves that slowed and compressed the airflow to a subsonic speed before it reached each engine compressor.
This pressure recovery was crucial to efficient cruise. If the shock pattern moved out of position, an intake unstart could cause a sharp loss of thrust, noise and yaw; the intake controls and engine protections were designed to correct it rapidly.
Concorde used reheat—the British term for afterburning—during take-off and the transonic acceleration. Reheat was normally switched off at about Mach 1.7, after which the four Rolls-Royce/Snecma Olympus 593 turbojets carried the aircraft to Mach 2 and sustained cruise without it. Leaving reheat on throughout cruise would have consumed far too much fuel.
Why was Concorde's delta wing suitable for Mach 2?
Concorde's very thin, sharply swept ogival delta wing reduced wave drag and remained stable at supersonic speed. At low speed, the same wing generated strong leading-edge vortices and needed a high angle of attack, which is why Concorde approached nose-high and used its drooping nose to restore the pilots' view.
Flying above 50,000 ft also reduced drag because the air was thin. As fuel burned and the aircraft became lighter, Concorde performed a gradual cruise climb, rising towards 60,000 ft while remaining near Mach 2.
How did Concorde handle heat and balance?
Aerodynamic heating was one of Concorde's hard speed limits. The nose could reach roughly 127°C, and the airframe expanded by several inches during supersonic cruise. Its aluminium construction, temperature limits and highly reflective white finish were all part of the thermal design; substantially higher speeds would have demanded different structural materials.
Passing through the sound barrier also moved the aerodynamic centre of pressure rearwards. Concorde pumped fuel between forward and aft trim tanks to move its centre of gravity, rather than holding large elevon deflections that would add drag. Fuel moved aft during acceleration and forwards again during deceleration.
What did a Concorde Mach 2 flight profile look like?
A Concorde flight reached Mach 2 in stages and spent only the oceanic portion of a typical transatlantic service at full cruise speed.
- Take off with reheat: all four engines used reheat for the high-power departure.
- Climb subsonically: the aircraft followed noise and route restrictions while leaving the airport area.
- Accelerate over an approved area: reheat helped Concorde through the high-drag transonic region and remained in use until roughly Mach 1.7.
- Continue to Mach 2 without reheat: the engines and intakes then sustained efficient supersonic cruise.
- Cruise-climb: the aircraft rose gradually as its weight decreased.
- Decelerate before landfall: Concorde returned to subsonic speed before entering areas where routine sonic booms were prohibited.
This produced transatlantic crossing times of roughly three and a half hours, although wind, routing and the subsonic departure and arrival segments prevented a simple distance-divided-by-1,350-mph calculation.
Why could Concorde not fly at Mach 2 over land?
Concorde's shock waves formed a sonic-boom corridor beneath its entire supersonic route, so routine Mach 2 operation was largely confined to oceanic tracks. The boom was not a single sound left behind when the aircraft crossed Mach 1; it was generated continuously while Concorde remained supersonic.
What should Mach 2 look like in a flight simulator?
A simulated Concorde should show Mach near 2 while true airspeed is around 1,150–1,175 knots, even though indicated airspeed is much lower. A common mistake is to watch groundspeed alone, which changes with wind, or to leave reheat engaged throughout cruise.
The expected sequence is reheat for take-off and transonic acceleration, reheat off near Mach 1.7, dry acceleration to Mach 2, then a gradual cruise climb. Simmers can recreate that profile with our Concorde package for FSX and Prepar3D, which includes supersonic flight dynamics, reheat and a sonic-boom gauge.