I saw a documentary about the tests and all the work that lay ahead the first flight of the B777, and one thing that had to be done was to weigh (sp?) the aircraft. This was done on three different scales, one for each set of landing-gear. They then somehow added the results from each scale and found out how heavy the plane was.
It's that last process I don't understand.
If you put a metal tube across three scales, one scale wouldn't show how much 1/3 of the tube weighs. The weight of the rest of the tube would affect the scale, and you would end up weighing the same area of the tube on all the scales. (Sounds complicated, I know.) This would happen when weighing a plane aswell, right?
Therefore: How can they find out exactly what a plane weighs?
If anyone understood what my question was based upon, I hope you could give me some answers.