Landing distance data are based on crossing the beginning of the available landing distance at 50' at which speed?

Landing distance data are based on crossing the beginning of the available landing distance at 50' at which speed?

• A. Vref
• B. V2
• C. Vapp
• D. Vle

Answer: (A)

Landing distance data are calculated from a stabilized final approach crossing 50 feet above the runway at the reference landing speed. That speed, known as Vref, represents the speed you’re expected to fly in the landing configuration to produce the proper energy and flight path for a safe touchdown. The data are tied to this specific speed so the distances are consistent under the chart’s assumed conditions. Vref is the speed used for landing calculations, not the takeoff speed (V2), not the general approach speed (Vapp) used for planning, and not the maximum gear extension speed (Vle).

Landing distance data are calculated from a stabilized final approach crossing 50 feet above the runway at the reference landing speed. That speed, known as Vref, represents the speed you’re expected to fly in the landing configuration to produce the proper energy and flight path for a safe touchdown. The data are tied to this specific speed so the distances are consistent under the chart’s assumed conditions. Vref is the speed used for landing calculations, not the takeoff speed (V2), not the general approach speed (Vapp) used for planning, and not the maximum gear extension speed (Vle).