What are Vle and Vlo and why are they important in performance planning for gear-equipped aircraft?

• A. Vle is maximum gear extension speed; Vlo is maximum gear retraction speed.
• B. Vle is maximum gear extension speed; Vlo is maximum gear operating speed.
• C. Vle is maximum gear extension speed; Vlo is maximum gear operating speed; exceeding either can cause gear structural damage or failure; important for speed planning near the ground.
• D. Vle is minimum gear extension speed; Vlo is minimum gear retraction speed.

Answer: (C)

The main thing being tested is how speed limits tied to the landing gear govern safe operation and performance planning. Vle and Vlo set the boundaries for how fast you can fly with the gear in certain states, so you don’t over-stress the gear system.

Vle is the maximum speed with the landing gear extended. When the gear is down, the airplane experiences more drag and different structural loads. If you fly faster than Vle while the gear is extended, those loads can exceed what the gear, doors, and locking mechanisms were designed to handle, risking damage or failure.

Vlo is the maximum speed at which the landing gear can be moved—extended or retracted. The gear operation has to occur within this limit because above it the mechanisms may not deploy or lock reliably, and the forces on the gear system during movement can cause damage or improper installation.

Because these limits matter most during approach, landing, or after takeoff, performance planning always includes staying within these speeds to ensure gear can be deployed and secured safely and to avoid dangerous gear-related failures.