What angular spacing is used when replacing three blades as a set?

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Multiple Choice

What angular spacing is used when replacing three blades as a set?

Explanation:
Even spacing around the hub is essential for rotor balance. With three blades, dividing a full circle evenly gives 360 degrees / 3 = 120 degrees between each blade. So when replacing three blades as a set, position them 120 degrees apart. This equal spacing ensures uniform mass distribution and minimizes vibration. Spacings like 60, 90, or 180 degrees would create imbalance because the blades would not be distributed evenly around the circumference.

Even spacing around the hub is essential for rotor balance. With three blades, dividing a full circle evenly gives 360 degrees / 3 = 120 degrees between each blade. So when replacing three blades as a set, position them 120 degrees apart. This equal spacing ensures uniform mass distribution and minimizes vibration. Spacings like 60, 90, or 180 degrees would create imbalance because the blades would not be distributed evenly around the circumference.

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