The zero lift drag coefficient, CD0, quantifies an aircraft’s drag when it produces no lift at zero angle of attack. It’s a dimensionless parameter determined by the body’s shape, surface characteristics, and other non-lift generating factors. Lower CD0 values signify reduced drag during level flight, enhancing fuel efficiency and overall aerodynamic performance. The formula to calculate Zero lift drag coefficient as follows:
Where:
- Â is the drag coefficient,
- Â is the zero-lift drag coefficient,
- Â is the lift coefficient,
- Â is the Oswald efficiency factor,
- Â is the aspect ratio of the wings.