Glossary - W
Waterline (WL). A horizontal reference plane used to locate vertical positions on an aircraft. Positions are usually given in inches above or below the waterline.
Watt. A unit of power equal to one joule per second.
Weighing points. Locations on an aircraft that the manufacturer designates for the placement of scales when weighing aircraft.
Weight. A measure of the pull of gravity acting on the mass of an object.
Whole numbers. The numbers: 0, 1, 2, 3, 4, 5, and so on.
Wiring diagrams. A diagram that shows the electrical wiring and circuitry, coded for identification, of all the electrical appliances and devices used on aircraft.
Work. The amount of energy transferred by a force.
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