What is the primary benefit of a bogie wheel landing gear configuration compared with a single wheel on a main gear leg?

• A. Higher load on tyres
• B. Increased maintenance complexity
• C. Reduced tyre pressure and lower ACN
• D. Higher cost

Answer: (C)

The main idea is that bogie landing gear spreads the aircraft’s weight across several tires, rather than a single wheel. By sharing the load, each tire carries less pressure and the total footprint on the runway is larger. That means the pavement sees a lower loading factor (ACN) for the gear and the tires experience less stress and wear. This is the primary benefit of a bogie setup: reduced tyre pressure and a lower ACN due to load distribution. The other outcomes described—higher tyre load, more maintenance complexity, or higher cost—aren’t advantages of having multiple wheels; they’re typically trade-offs that come with added wheels.