What is Vfe 5?

What is Vfe 5?

• A. 180 knots
• B. 165 knots
• C. 200 knots
• D. 215 knots

Answer: (A)

Vfe is the maximum speed at which the airplane may be flown with a given flap setting extended. Each flap position has its own Vfe published in the aircraft’s limits, because extending the flaps changes the wing’s lift and drag characteristics and increases structural loads if you go too fast. For flap setting 5 on the ERJ 175, the published Vfe is 180 knots. This is the speed limit you must not exceed while the flaps are at position 5. If you need to fly faster with the flaps still out, you would retract to a smaller flap setting (which has a higher Vfe) before accelerating. The other speeds listed aren’t the Vfe for flap 5; they either correspond to different flap settings or are not the Vfe limit for that configuration.

Vfe is the maximum speed at which the airplane may be flown with a given flap setting extended. Each flap position has its own Vfe published in the aircraft’s limits, because extending the flaps changes the wing’s lift and drag characteristics and increases structural loads if you go too fast.

For flap setting 5 on the ERJ 175, the published Vfe is 180 knots. This is the speed limit you must not exceed while the flaps are at position 5. If you need to fly faster with the flaps still out, you would retract to a smaller flap setting (which has a higher Vfe) before accelerating. The other speeds listed aren’t the Vfe for flap 5; they either correspond to different flap settings or are not the Vfe limit for that configuration.