Which drag type accounts for drag that does not arise from lift production and includes form and skin friction on non-lifting surfaces?

Which drag type accounts for drag that does not arise from lift production and includes form and skin friction on non-lifting surfaces?

• A. Induced
• B. Profile
• C. Form
• D. Parasite

Answer: (D)

Drag can be separated into two broad families: one tied to lifting, and the other not tied to lift at all. The description here points to the latter—drag that does not arise from lift production. This is parasite drag, which covers the pressure (form) drag and viscous (skin friction) drag on surfaces that aren’t contributing to generating lift. Examples include the fuselage, landing gear, antennas, and other non-lifting parts of the aircraft. Induced drag comes from the wing producing lift and is not what this question describes, while form drag and skin friction are components of parasite drag, not separate categories that describe non-lift-related drag on their own.

Drag can be separated into two broad families: one tied to lifting, and the other not tied to lift at all. The description here points to the latter—drag that does not arise from lift production. This is parasite drag, which covers the pressure (form) drag and viscous (skin friction) drag on surfaces that aren’t contributing to generating lift. Examples include the fuselage, landing gear, antennas, and other non-lifting parts of the aircraft. Induced drag comes from the wing producing lift and is not what this question describes, while form drag and skin friction are components of parasite drag, not separate categories that describe non-lift-related drag on their own.