Bogie wheel landing gear configuration reduces which two factors compared to a single wheel arrangement?

• A. Higher tyre pressure and higher ACN
• B. Reduced tyre pressure and lower ACN
• C. Increased maintenance time and weight
• D. Greater aerodynamic drag

Answer: (B)

Distributing the aircraft’s weight over multiple wheels lowers the load each tire must carry. With a bogie, several tires share the same strut, so the force on any individual tire is smaller. That means the required pressure for the tire can be reduced, since the load per tire is lower. It also lowers the pavement impact, which engineers express as the Aircraft Classification Number (ACN); a lighter load per wheel translates to a lower ACN, meaning less stress on the pavement.

So, bogie gear reduces both the per-tire load (and thus the tire pressure needed) and the overall pavement impact (the ACN). The other options aren’t aligned with this effect: bogie configurations don’t inherently reduce maintenance time and weight, and while they can affect aerodynamics, the primary two factors affected in this context are tyre pressure per tire and ACN.