Originally Posted by corporate-wage-slave

I can answer the last two. W+B calculations are done at the last moment and are weather dependent (among other things). It's even been the case that aircraft have trundled back to the departure gate after a late W+B calc requires something to change just prior to departure. The last question: it gets 2 tonnes off the aircraft, and that may be the W+B requirement. 83 kgs for men, 75 kgs for ladies, and I'm glad they aren't more precise than that.