How many inches ahead of the wing leading edge is the datum located?

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Multiple Choice

How many inches ahead of the wing leading edge is the datum located?

In weight and balance, the datum is a fixed reference point from which all horizontal distances (arms) are measured. For this airplane, the manufacturer sets the datum 78.4 inches ahead of the wing leading edge. That means every weight’s moment is calculated using its distance forward of that point; weights located forward of the datum produce positive moments, and the CG is found from the total moment divided by total weight. So the correct answer reflects the aircraft’s documented datum location: 78.4 inches ahead of the wing leading edge. The other options don’t fit because they describe the datum as behind the leading edge, above it, or specify a different forward distance than what the manufacturer specifies.

In weight and balance, the datum is a fixed reference point from which all horizontal distances (arms) are measured. For this airplane, the manufacturer sets the datum 78.4 inches ahead of the wing leading edge. That means every weight’s moment is calculated using its distance forward of that point; weights located forward of the datum produce positive moments, and the CG is found from the total moment divided by total weight.

So the correct answer reflects the aircraft’s documented datum location: 78.4 inches ahead of the wing leading edge. The other options don’t fit because they describe the datum as behind the leading edge, above it, or specify a different forward distance than what the manufacturer specifies.

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