Which configuration is ideal for installation on aircraft wings?

Which configuration is ideal for installation on aircraft wings?

• A. Opposed
• B. Inline
• C. V-type
• D. Radial

Answer: (A)

Opposed engines are best for wing installation because their flat, compact layout fits neatly into a wing nacelle and keeps the thrust line close to the wing, reducing drag and simplifying aerodynamics. The cylinders sit on opposite sides of the crankcase, giving natural primary balance which smooths operation and minimizes vibration transmitted to the airframe—an important factor for wing-mounted engines. This configuration also provides a low profile and short engine length, making it easier to design the nacelle and maintain proper clearance with landing gear and the wing structure. Cooling is efficient since air flows evenly around cylinders on both sides. Inline engines, by contrast, are longer and taller, which increases nacelle size and drag. V-type engines are wider and add complexity to nacelle design, while radial engines have a large frontal area and weight that are not ideal for wing mounting. Hence, the opposed configuration is the most suitable for wings.

Opposed engines are best for wing installation because their flat, compact layout fits neatly into a wing nacelle and keeps the thrust line close to the wing, reducing drag and simplifying aerodynamics. The cylinders sit on opposite sides of the crankcase, giving natural primary balance which smooths operation and minimizes vibration transmitted to the airframe—an important factor for wing-mounted engines. This configuration also provides a low profile and short engine length, making it easier to design the nacelle and maintain proper clearance with landing gear and the wing structure. Cooling is efficient since air flows evenly around cylinders on both sides.

Inline engines, by contrast, are longer and taller, which increases nacelle size and drag. V-type engines are wider and add complexity to nacelle design, while radial engines have a large frontal area and weight that are not ideal for wing mounting. Hence, the opposed configuration is the most suitable for wings.