Test yourself: 5 hard theory questions, free Airspace, weather, regs and aerodynamics, FAA-style — instant score, every answer explained. No signup.
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An arm (moment arm) is:
A
the weight of an item
B
the vertical distance from the wing
C
the horizontal distance from the datum to the item's CG
D
the total moment
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See where you stand: 5 hard questions, instant score, every answer explained.