A vertical plane perpendicular to the aircraft longitudinal axis from which fore and aft (usually aft)
measurements are made for weight and balance purposes.
That portion of the engine oil which can be drained from the engine.
The aircraft weight with fixed ballast, unusable fuel, engine oil, engine coolant, hydraulic fluid,
and in other respects as required by applicable regulatory standards.
The weight of the aircraft at landing touchdown.
The largest weight allowed by design, structural, performance or other limitations.
A measure of the rotational tendency of a weight, about a specified line, mathematically equal to
the product of the weight and the arm.
Weights corresponding to the aircraft as offered with seating and interior, avionics, accessories,
fixed ballast and other equipment specified by the manufacturer as composing a standard
The longitudinal distance from some point to the zero datum or zero fuselage station.
The weight of the aircraft at lift-off.
The fuel remaining after consumption of usable fuel.
That portion of the total fuel which is available for consumption as determined in accordance
with applicable regulatory standards.
The difference between the aircraft ramp weight and basic empty weight.
Foot or feet
Pounds per square inch
Rate of climb