Reference
Aviation glossary
Concise definitions for aviation terminology — from METAR and NOTAM to aerodynamics and airline operations. Search directly or scan alphabetically.
L
L/D MaxL/D Max is the airspeed where an aircraft produces the greatest lift-to-drag ratio, generating the most lift with the least drag. This speed represents the lowest possible total drag and defines best glide speed in engine failure scenarios. Landside OperationsLandside operations are all airport activities in public areas before the security checkpoint, including check-in, baggage claim, customs, and ground transportation connections. LiftLift is the aerodynamic force generated by airflow over a wing that acts upward, perpendicular to the relative wind, and opposes gravity to enable aircraft flight. Liquid Water ContentLiquid water content (LWC) is the total mass of liquid water droplets suspended in a given volume of air, measured in grams per cubic meter (g/m³). Higher LWC accelerates ice accumulation on aircraft surfaces during flight through icing conditions. Load FactorLoad factor is the ratio of an aircraft's lift to its weight, expressed in g's. In straight and level flight, load factor equals 1g; in turns and maneuvers, it increases as the pilot demands more lift. Low Visibility ProcedureLow Visibility Procedure (LVP) is a set of enhanced airport operating rules that activate when visibility or cloud ceiling drops below minimums required for standard instrument approaches, allowing only certified crews to operate.
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