The maximum allowable airplane weight excluding usable fuel is referred to as what?

The maximum allowable airplane weight excluding usable fuel is known as the maximum zero fuel weight (MZFW). This weight limit is important because it ensures that the structural integrity of the aircraft is maintained without relying on the weight of the fuel to provide balance and control.

MZFW includes the weight of the aircraft plus all the operational elements such as cargo, passengers, and baggage, but excludes any fuel that might be on board. This limit is crucial for preventing structural overloading of the aircraft during flight phases prior to takeoff when the fuel weight is not a factor.

Understanding MZFW helps in planning loading and balance, ensuring the aircraft remains within safe operational parameters even before fuel is considered.