Profile drag

Definitions

• The total of the skin friction drag and form drag for a two-dimensional airfoil section.
• Drag incurred from frictional or parasitic resistance of the blades passing through the air. It does not change significantly with the angle of attack of the airfoil section, but it increases moderately as airspeed increases.

References

• Airplane Flying Handbook, Federal Aviation Administration, 2021
• Helicopter Flying Handbook, Federal Aviation Administration, 2019
• Rotorcraft Flying Handbook, Federal Aviation Administration, 2000