This little video shows Boeing verifying the crosswind landing limits on the 777 and the 747SP. The engineers design the landing gear system, goes up for a design review, gets manufactured, the maintenance people install it, ops check it, then jack and retract the system; but then Boeing test crews have to actually prove the design. Before the landing gear sideload limits gets etched in stone in the -1 flight manual. So they sneak off to Brazil to do these tests at a certain remote BAF...