The Operating Empty Weight (OEW) of an aircraft is the weight of the aircraft in a fully operational and empty state, ready for flight. It includes the weight of the aircraft’s structure, standard equipment, furnishings, and other operational items, but excludes the weight of passengers, cargo, operational fluids (such as engine oil and hydraulic fluid), and usable fuel. Here’s the formula, definition, and SI unit for Operating Empty Weight:
Operating Empty Weight Formula: The formula for calculating the Operating Empty Weight (OEW) is the sum of the structural weight of the aircraft, standard equipment, furnishings, and other operational items:
- OEW: Operating Empty Weight, measured in kilograms (kg) or pounds (lbs), depending on regional conventions.
- Structural Weight: The weight of the aircraft’s structure, including the airframe, engines, landing gear, and other essential components, measured in kilograms (kg) or pounds (lbs).
- Standard Equipment Weight: The weight of standard equipment installed on the aircraft for operational purposes, measured in kilograms (kg) or pounds (lbs).
- Furnishings Weight: The weight of furnishings and interior components, such as seats, galleys, and lavatories, measured in kilograms (kg) or pounds (lbs).
- Other Operational Items Weight: The weight of other operational items required for aircraft operation, excluding payload, operational fluids, and usable fuel, measured in kilograms (kg) or pounds (lbs).