Number of wheels - necessity to spread the weight over an area of surface. Runway/taxiway/apron surfaces are all given bearing strength figures. We can look them up in a book for any airport we have to make an unscheduled visit to, and of course they are known to the aircraft designers. The often quoted example is the early Indian Airlines A320s, given a specially designed 8 wheel main gear because of the weak surfaces the airline flew to.
bohica From United States of America, joined Feb 2004, 2804 posts, RR: 0
Reply 2, posted (1 year 8 months 3 weeks 2 hours ago) and read 4117 times:
Quoting musang (Reply 1): Not sure what you mean on the A330 gear........
I believe he is referring to the space between the front and rear axles on the A330 main landing gears. They are spaced that far apart to distribute the weight on the ground better. Comparing it to a 767, the A330 is a heavier airplane than the 767. If the front and rear axles were spaced the same as the 767, the weight would be concentrated on a smaller area, possibly causing damage to the surface. By spreading out the axles, the same weight is distributed over a larger area without having to add wheels or another landing gear, which obviously would add weight to the plane.