From 10,000 ft to Mach transition, which VMO applies?

From 10,000 ft to Mach transition, which VMO applies?

• A. 300
• B. 320
• C. 340
• D. 360

Answer: (B)

The maximum operating speed in that portion of the flight envelope is defined by VMO, and the airspeed limit is given in knots indicated. Between 10,000 ft and the Mach transition altitude, the published limit for the ERJ 175 is 320 knots indicated. This is the speed you must not exceed in that band; once you reach the Mach transition, the governing limit switches from VMO to MMO (the Mach-number limit). Exceeding 320 knots in this band would violate the published VMO and could impose structural or certification concerns. The other numbers would either exceed the published limit for this altitude band or correspond to other portions of the envelope.

The maximum operating speed in that portion of the flight envelope is defined by VMO, and the airspeed limit is given in knots indicated. Between 10,000 ft and the Mach transition altitude, the published limit for the ERJ 175 is 320 knots indicated. This is the speed you must not exceed in that band; once you reach the Mach transition, the governing limit switches from VMO to MMO (the Mach-number limit). Exceeding 320 knots in this band would violate the published VMO and could impose structural or certification concerns. The other numbers would either exceed the published limit for this altitude band or correspond to other portions of the envelope.