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5 Cards in this Set
- Front
- Back
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Reference Datum
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An imaginary vertical line from which all horizontal distances are measured for balance purposes
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ARM
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(moment arm) the horizontal distance in inches from the reference datum to an item or position on the airplane.
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Moment
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Moment is the weight (in pounds) of an item multiplied by its ARM (in inches).
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Useable Fuel
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Fuel available for flying
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Unusable Fuel
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Fule in the aircraft that is not available to the engine.
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