Why is the emergency gear extension speed 120 knots whereas normal Vle is 180?

• A. To reduce air drag as the nose gear swings forward into the relative wind
• B. To prevent hydraulic overheating
• C. To ensure the gear retracts smoothly
• D. To avoid engine stall

Answer: (A)

During emergency gear extension the gear is moved using limited or alternative power, and the nose gear swings out into the airstream. Keeping the speed down to about 120 knots reduces dynamic pressure on the partially extended gear and doors, so the mechanism isn’t overwhelmed by wind forces as it transitions to its locked position. This helps ensure reliable deployment and proper seating of the gear without excessive loading that could cause misalignment or damage.

Normal Vle of 180 knots assumes full hydraulic power and normal operating conditions, where rapid deployment is safe and dependable. In the emergency scenario, the priority is a controlled, reliable extension under reduced power, hence the lower speed.

Hydraulic overheating isn’t the main concern in this context because emergency extension relies on alternate or limited power rather than normal hydraulic flow. The issue isn’t about retraction smoothness, and engine stall isn’t directly related to the gear extension speed.