Moment index

The moment (weight times arm) divided by a reduction factor.

Aircraft Weight and Balance Handbook, p. G-4

Also defined in 1 more source

A moment divided by a constant such as 100, 1,000, or 10,000. The purpose of using a moment index is to simplify weight and balance computations of airplanes where heavy items and long arms result in large, unmanageable numbers.

Pilot's Handbook of Aeronautical Knowledge, p. G-20

Taught in GEN-C Quick reference, GEN-C Procedures.