Mach Number Rechner — Formel
## Mach Number
The Mach number is a dimensionless ratio comparing an object's speed to the speed of sound in the surrounding medium.
### Formula
**M = v / v_sound**
- M < 1: subsonic
- M = 1: sonic (speed of sound)
- M > 1: supersonic
- M > 5: hypersonic
The Mach number is a dimensionless ratio comparing an object's speed to the speed of sound in the surrounding medium.
### Formula
**M = v / v_sound**
- M < 1: subsonic
- M = 1: sonic (speed of sound)
- M > 1: supersonic
- M > 5: hypersonic
Lösungsbeispiel
An aircraft flying at 680 m/s in air at 20 degrees C.
- v_sound = 331.3 + 0.606 * 20 = 343.4 m/s
- M = 680 / 343.4
- M = 1.980
- The aircraft is supersonic (M > 1)