Quick Facts
- Type
- Aerodynamic Concept
- Definition
- All aerodynamic drag not related to lift production
- Used By
- Pilots, Engineers
Definition#
Parasite drag encompasses all drag forces that are not a byproduct of lift generation. It has three components: form drag (shape), skin friction drag (surface roughness), and interference drag (where components meet).
Why It Matters Operationally#
Parasite drag increases with the square of airspeed. At cruise speeds, it dominates total drag. Smooth surfaces, streamlined shapes, and flush rivets reduce parasite drag and improve performance.
Related Guides#
- Induced vs Parasite Drag
- How Airplanes Fly — The Complete Aviation Fundamentals Guide
- How Jet Engines Work (Turbofan vs Turboprop)