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What happens to the Maximum Operating Mach (MMO) when the Mach Number increases?

  • A

    MMO decreases

  • B

    MMO remains the same

  • C

    MMO increases

  • D

    MMO increases then decreases

When creating the aircraft, the manufacturer defines the MMO (Maximum Operating Mach) as a fixed limit. It is the maximum Mach number at which the aircraft can operate without experiencing adverse aerodynamic effects such as shock waves or buffeting due to transonic or supersonic flow. Increasing the Mach number of the aircraft does not change the MMO as it is a fixed value. Operating above this value could lead to unsafe conditions, but the MMO itself remains unchanged.

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