Quick Facts
- Type
- Aerodynamic Reference
- Definition
- The reference chord length of a wing used for aerodynamic calculations, CG po...
- Used By
- Engineers, Load Planners
Definition#
Mean aerodynamic chord (MAC) is a calculated reference chord length that represents the aerodynamic characteristics of a wing planform. CG position is typically expressed as a percentage of MAC.
Why It Matters Operationally#
Weight and balance calculations reference CG as a percentage of MAC (e.g., "CG at 25% MAC"). Staying within the certified CG range ensures proper stability margins.