[falcolas]

Easier - add weight sensors to the landing gears. A set of piezo sensors between the mounts and the frames should suffice. Only three sensors to calibrate and maintain, they can give a real-time indication of the actual balance of the aircraft (including fuel), and don't impose on the airline's customers (or staff, other than to move a few people around to correct for a bad CG, something they do today).

[phil21]

I remember thinking this as the obvious answer as well, but then reading a few forum threads discussing that these already exist but were not reliable enough to rely on.

That was some time ago, I wonder if the situation has changed any.