Which pair best describes the two primary categories of wing design described?

• A. Wing sweep designs; Planform designs
• B. Aileron types and flaps
• C. Fuselage length and wing chord
• D. Tailplane geometry and canopy shape

Answer: (A)

Wing design is described along two fundamental axes: how much the wing is swept back or forward (sweep), and the shape of the wing as seen from above (planform). The sweep affects high-speed aerodynamic behavior, such as delaying shock formation and changing stall characteristics, while the planform shape determines lift distribution and induced drag, influencing efficiency and stall behavior. Together, these two categories capture the main geometric aspects designers manipulate on a wing.

This pair—sweep designs and planform designs—best fits because it covers the primary geometric dimensions of wing shape, whereas the other choices mix in control surfaces, basic dimensions, or separate components that aren’t the two primary design categories of the wing itself.