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A
reduces the magnitude of moments, making it less time-consuming to compute.
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B
regroups different loading zones in single indexes, reducing the complexity of the load and trim sheet.
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C
is digitalised and can be automatically uploaded to the aircraft FMC to determine stabiliser trim.
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D
directly produces the position of the CG and the stabiliser trim setting.
When completing load sheets, particularly for large aircraft, it is convenient to use an Index to represent the large numbers involved and to simplify the calculations.
Generally, Loading Index is a non-dimensional figure (i.e. a figure without unit of measurement) that is a scaled down value of a moment and the effect of reducing the magnitude of the moment to one that is much easier to use.
A "Loading Index" (LI) is simply a Moment (Load Mass x CG Arm) divided by a constant: LI = (Load Mass x CG Arm) / Constant = Load Moment / Constant.
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