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The "Operating empty weight" (OEW) is the sum of the empty weight and the crew plus their baggage. Standard items include all structural modification or configuration orders that may have altered the MEW, including all fluids necessary for operation such as engine oil , engine coolant , water , hydraulic fluid and unusable fuel .
In aviation, manufacturer's empty weight (MEW) (also known as manufacturer's weight empty (MWE)) is the weight of the aircraft "as built" and includes the weight of the structure, power plant, furnishings, installations, systems, and other equipment that are considered an integral part of an aircraft before additional operator items are added for operation.
Unusable fuel is included in ZFW. Remember the takeoff weight components contributions: + + = Where OEW is the Operating Empty Weight (that is a charactersitic of the plane), PL is the Payload actually embarqued, and FOB the Fuel actually embarqued and TOW the actual take-off weight.
The empty weight of a vehicle is based on its weight without any payload (cargo, passengers, usable fuel, etc.). [1] [2] Aviation.
The top horizontal line represents the maximum payload. It is limited structurally by maximum zero-fuel weight (MZFW) of the aircraft. Maximum payload is the difference between maximum zero-fuel weight and operational empty weight (OEW). Moving left-to-right along the line shows the constant maximum payload as the range increases.
Operating weight is a measure of the total weight of a vehicle or machine when it is in use, including all necessary components such as the driver or operator, fuel, and any additional equipment or tools required for its operation.
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The logarithmic term with weight ratios is replaced by the direct ratio between / = where is the energy per mass of the battery (e.g. 150-200 Wh/kg for Li-ion batteries), the total efficiency (typically 0.7-0.8 for batteries, motor, gearbox and propeller), / lift over drag (typically around 18), and the weight ratio / typically around 0.3.