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Weight and Balance

Vaughn College GL21-1

Payload The term used for passengers, baggage and cargo.
Useful Load The weight of the occupants, baggage, and usable fuel. (Aircraft Certified before FAR Part23 include oil.)
Usable Fuel The portion of the total fuel load available to an aircraft in flight.
Unusable Fuel The small amount of fuel that cannot be safely used in flight or drained on the ground.
Zero Fuel Weight The weight of the aircraft to include all useful load except fuel.
Maximum Ramp Weight The maximum weight approved for operations on the ground.
Maximum Takeoff Weight The maximum design weight of any aircraft for takeoff.
Maximum Landing Weight The maximum authorized weight of the aircraft for landing.
Maximum Weight The maximum allowable weight for an aircraft under any conditions.
Scale Weight The weight registered on the scales used to weigh an aircraft.
Tare Weight The weight of all items such as blocks or chocks used to hold an airplane on the scales when it is being weighed.
Net Weight The scale weight subtracted from the weight of any items not part of the aircraft such as chocks or blocks.
Acrobatic Category Airplane An airplane that is approved for flight without restrictions other than those shown to be necessary as a result of a flight test.
Arm The horizontal distance that an item of equipment is located from the datum.
Ballast Weight that is installed in an aircraft for the purpose of bringing the CG into the desired range.
Basic Weight A weight determined by the manufacture.
Center of Gravity (CG) The point about which the weight of an airplane or any object is concentrated or balanced.
Center of Gravity Limits The maximum forward and rearward location allowable for the CG.
Center of Gravity Range The distance between the forward and rearward limits.
Datum An imaginary vertical plane from which all horizontal measurements are taken.
Empty Weight The weight of an aircraft with unusable fuel and full oil. If certified before 3/1/1978 it includes unusable fuel and unusable oil.
Empty Weight Center of Gravity (EWCG) The CG of an aircraft in its empty weight condition.
Empty Weight Center of Gravity Range Limit set that makes it impossible to exceed the GG range using standard specification loading arrangements.
Full Fuel (Total Fuel) The amount of fuel indicated on the TCD's which includes usable and unusable fuel.
Full Oil (total Oil) The amount of oil indicated on the TCD's which includes usable and unusable oil.
Leveling Means The method specified by the aircraft designer by which the technician can determine that the aircraft is properly leveled for weighing.
Lateral Center of Gravity Determining the CG of an airplane from wing tip to wing tip.
Longitudinal Center of Gravity Determining the CG of an airplane from nose to tail.
Minimum Fuel The minimum amount of fuel considered to be in the tanks when computing an adverse- loaded CG condition.
Moment The product of a weight of an item times its distance from the datum.
Normal Category The category of aircraft certified under FAR Part 23, which is limited to non acrobatic operations.
Residual Fuel and Oil The fluids that will not normally drain because they are trapped in the lines, filters, tanks, etc.
Station Is a longitudinal location on an aircraft measured from the datum, or a lateral wing point measured from buttline "0".
Utility Category That category of aircraft, certified under FAR Part 23, which are intended for limited acrobatic operation.
Weighing Points Specified point on an aircraft where the scales are placed for weighing the aircraft.
Wheelbase The distance measured in inches between the center of the main wheels and the center of the nose or tail wheel.
Created by: sumthnlykastar