Given today's sensor technology, it is surprising that not at least one of the following solutions has been adopted:
- "weighbridge" concept: a/c passes over a strip of load cells on taxiway or at runway threshold, where actual take-off weight is determined and relayed to cockpit crew for verification of their loadsheet calculations
or
- built-in weighing capability by using load cells in landing gear suspension to continuously monitor actual aircraft weight at any given moment on the ground.
Neither solution is prohibitively expensive and could, essentially, even be integrated into take-off weight calculation software.