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The VFE speed is the...

  • A

    stalling or minimum steady flight speed with the flaps retracted.

  • B

    maximum flap extended speed.

  • C

    stalling or minimum steady flight speed with the flaps extended.

  • D

    maximum landing gear extended speed.

Refer to figure.
CS 25.1511 Flap extended speed

The established flap extended speed VFE must be established so that it does not exceed the design flap speed VFE chosen under CS 25.335 (e) and 25.345, for the corresponding wing-flap positions and engine powers.

Here are the different speeds with the associated visual indicators (colored arcs) of an airspeed indicator:

White arc:

  • Lower limit – VS0: stalling speed with flaps extended.
  • Upper limit – VFE: maximum speed with flaps extended.

Green Arc:

  • Lower limit – VS1: stalling speed in clean configuration.
  • Upper limit – VN0: maximum speed in normal operation.

Yellow arc:

  • Lower limit – VN0: maximum speed in normal operation.
  • Upper limit – VNE: Red Line - never exceed speed.

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