Which value corresponds to the maximum Mach number (MMO)?

Which value corresponds to the maximum Mach number (MMO)?

• A. .78
• B. .82
• C. .84
• D. .90

Answer: (B)

MMO is the highest speed at which the airplane is certified to operate, limited by aerodynamic buffet, structural loads, and control effectiveness. For this aircraft, the published MMO is Mach 0.82, so the value 0.82 is the maximum Mach number. Speeds higher than this would push the airplane into unsafe regimes where the structure or controls may not respond predictably, while speeds well below MMO aren’t the published limit.

MMO is the highest speed at which the airplane is certified to operate, limited by aerodynamic buffet, structural loads, and control effectiveness. For this aircraft, the published MMO is Mach 0.82, so the value 0.82 is the maximum Mach number. Speeds higher than this would push the airplane into unsafe regimes where the structure or controls may not respond predictably, while speeds well below MMO aren’t the published limit.