FAA Airframe Weight and Balance Practice Test – Prep, Questions, Study Guide

LEMAC (Leading Edge Mean Aerodynamic Chord) and TEMAC (Trailing Edge Mean Aerodynamic Chord) are both key reference points used in the weight and balance calculations of an aircraft. They are defined in relation to the aircraft’s datum, which serves as a baseline measurement point from which all other measurements are taken.

In weight and balance, understanding the location of LEMAC and TEMAC is crucial because it allows for the determination of the center of gravity (CG) of the aircraft. The CG position is critical for ensuring the safe operation of the aircraft, affecting stability and control during flight. By measuring the distances of LEMAC and TEMAC from the datum, pilots and engineers can assess how weight is distributed across the aircraft and make necessary adjustments for safe flight operations.

The other options do not correctly describe LEMAC and TEMAC as they are specifically oriented around the datum and not related to distances from the tail, engines, or wings directly. This distinction is fundamental in aviation dynamics where accurate weight and balance are essential for performance and safety.